/* ssl.c
 *
 * Copyright (C) 2006-2021 wolfSSL Inc.
 *
 * This file is part of wolfSSL.
 *
 * wolfSSL is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * wolfSSL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
 */


#ifdef HAVE_CONFIG_H
    #include <config.h>
#endif

#include <wolfssl/wolfcrypt/settings.h>
#if defined(OPENSSL_EXTRA) && !defined(_WIN32)
    /* turn on GNU extensions for XVASPRINTF with wolfSSL_BIO_printf */
    #undef  _GNU_SOURCE
    #define _GNU_SOURCE
#endif

#if !defined(WOLFCRYPT_ONLY) || defined(OPENSSL_EXTRA) || \
    defined(OPENSSL_EXTRA_X509_SMALL)

#include <wolfssl/internal.h>
#include <wolfssl/error-ssl.h>
#include <wolfssl/wolfcrypt/coding.h>
#ifdef NO_INLINE
    #include <wolfssl/wolfcrypt/misc.h>
#else
    #define WOLFSSL_MISC_INCLUDED
    #include <wolfcrypt/src/misc.c>
#endif

#ifdef HAVE_ERRNO_H
    #include <errno.h>
#endif


#if !defined(WOLFSSL_ALLOW_NO_SUITES) && !defined(WOLFCRYPT_ONLY)
    #if defined(NO_DH) && !defined(HAVE_ECC) && !defined(WOLFSSL_STATIC_RSA) \
                && !defined(WOLFSSL_STATIC_DH) && !defined(WOLFSSL_STATIC_PSK) \
                && !defined(HAVE_CURVE25519) && !defined(HAVE_CURVE448)
        #error "No cipher suites defined because DH disabled, ECC disabled, and no static suites defined. Please see top of README"
    #endif
    #ifdef WOLFSSL_CERT_GEN
        /* need access to Cert struct for creating certificate */
        #include <wolfssl/wolfcrypt/asn_public.h>
    #endif
#endif

#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL) || \
        defined(HAVE_WEBSERVER) || defined(WOLFSSL_KEY_GEN)
    #include <wolfssl/openssl/evp.h>
    /* openssl headers end, wolfssl internal headers next */
#endif

#include <wolfssl/wolfcrypt/wc_encrypt.h>

#ifndef NO_RSA
    #include <wolfssl/wolfcrypt/rsa.h>
#endif

#ifdef OPENSSL_EXTRA
    /* openssl headers begin */
    #include <wolfssl/openssl/aes.h>
    #include <wolfssl/openssl/hmac.h>
    #include <wolfssl/openssl/crypto.h>
    #include <wolfssl/openssl/des.h>
    #include <wolfssl/openssl/bn.h>
    #include <wolfssl/openssl/buffer.h>
    #include <wolfssl/openssl/dh.h>
    #include <wolfssl/openssl/rsa.h>
    #include <wolfssl/openssl/pem.h>
    #include <wolfssl/openssl/ec.h>
    #include <wolfssl/openssl/ec25519.h>
    #include <wolfssl/openssl/ed25519.h>
    #include <wolfssl/openssl/ec448.h>
    #include <wolfssl/openssl/ed448.h>
    #include <wolfssl/openssl/ecdsa.h>
    #include <wolfssl/openssl/ecdh.h>
    #include <wolfssl/openssl/err.h>
    #include <wolfssl/openssl/opensslv.h>
    #include <wolfssl/openssl/rc4.h>
    #include <wolfssl/openssl/stack.h>
    #include <wolfssl/openssl/x509_vfy.h>
    /* openssl headers end, wolfssl internal headers next */
    #include <wolfssl/wolfcrypt/hmac.h>
    #include <wolfssl/wolfcrypt/random.h>
    #include <wolfssl/wolfcrypt/des3.h>
    #include <wolfssl/wolfcrypt/ecc.h>
    #include <wolfssl/wolfcrypt/md4.h>
    #include <wolfssl/wolfcrypt/md5.h>
    #include <wolfssl/wolfcrypt/arc4.h>
    #include <wolfssl/wolfcrypt/idea.h>
    #include <wolfssl/wolfcrypt/curve25519.h>
    #include <wolfssl/wolfcrypt/ed25519.h>
    #include <wolfssl/wolfcrypt/curve448.h>
    #if defined(OPENSSL_ALL) || defined(HAVE_STUNNEL)
        #include <wolfssl/openssl/ocsp.h>
        #include <wolfssl/openssl/lhash.h>
        #include <wolfssl/openssl/txt_db.h>
    #endif /* WITH_STUNNEL */
    #if defined(WOLFSSL_SHA512) || defined(WOLFSSL_SHA384)
        #include <wolfssl/wolfcrypt/sha512.h>
    #endif
    #if defined(WOLFCRYPT_HAVE_SRP) && !defined(NO_SHA256) \
        && !defined(WC_NO_RNG)
        #include <wolfssl/wolfcrypt/srp.h>
    #endif
    #if defined(HAVE_FIPS) || defined(HAVE_SELFTEST)
        #include <wolfssl/wolfcrypt/pkcs7.h>
    #endif
    #if defined(OPENSSL_ALL) && defined(HAVE_PKCS7)
        #include <wolfssl/openssl/pkcs7.h>
    #endif /* OPENSSL_ALL && HAVE_PKCS7 */
#endif

#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
    #include <wolfssl/openssl/x509v3.h>
    int SetIndividualInternal(WOLFSSL_BIGNUM* bn, mp_int* mpi);
    int SetIndividualExternal(WOLFSSL_BIGNUM** bn, mp_int* mpi);
    int oid2nid(word32 oid, int grp);
    word32 nid2oid(int nid, int grp);
#endif

#if defined(WOLFSSL_QT)
    #include <wolfssl/wolfcrypt/sha.h>
#endif

#ifdef NO_ASN
    #include <wolfssl/wolfcrypt/dh.h>
#endif
#endif /* !WOLFCRYPT_ONLY || OPENSSL_EXTRA */

#define WOLFSSL_EVP_INCLUDED
#include "wolfcrypt/src/evp.c"

#ifndef WOLFCRYPT_ONLY

#ifdef OPENSSL_EXTRA
    /* Global pointer to constant BN on */
    static WOLFSSL_BIGNUM* bn_one = NULL;

    /* WOLFSSL_NO_OPENSSL_RAND_CB: Allows way to reduce code size for 
     *                OPENSSL_EXTRA where RAND callbacks are not used */
    #ifndef WOLFSSL_NO_OPENSSL_RAND_CB
        static const WOLFSSL_RAND_METHOD* gRandMethods = NULL;
        static int gRandMethodsInit = 0;
        static wolfSSL_Mutex gRandMethodMutex;
    #endif /* !WOLFSSL_NO_OPENSSL_RAND_CB */
#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) && defined(HAVE_ECC)
const WOLF_EC_NIST_NAME kNistCurves[] = {
    {XSTR_SIZEOF("P-192"),   "P-192",   NID_X9_62_prime192v1},
    {XSTR_SIZEOF("P-256"),   "P-256",   NID_X9_62_prime256v1},
    {XSTR_SIZEOF("P-112"),   "P-112",   NID_secp112r1},
    {XSTR_SIZEOF("P-112-2"), "P-112-2", NID_secp112r2},
    {XSTR_SIZEOF("P-128"),   "P-128",   NID_secp128r1},
    {XSTR_SIZEOF("P-128-2"), "P-128-2", NID_secp128r2},
    {XSTR_SIZEOF("P-160"),   "P-160",   NID_secp160r1},
    {XSTR_SIZEOF("P-160-2"), "P-160-2", NID_secp160r2},
    {XSTR_SIZEOF("P-224"),   "P-224",   NID_secp224r1},
    {XSTR_SIZEOF("P-384"),   "P-384",   NID_secp384r1},
    {XSTR_SIZEOF("P-521"),   "P-521",   NID_secp521r1},
    {XSTR_SIZEOF("K-160"),   "K-160",   NID_secp160k1},
    {XSTR_SIZEOF("K-192"),   "K-192",   NID_secp192k1},
    {XSTR_SIZEOF("K-224"),   "K-224",   NID_secp224k1},
    {XSTR_SIZEOF("K-256"),   "K-256",   NID_secp256k1},
    {XSTR_SIZEOF("B-160"),   "B-160",   NID_brainpoolP160r1},
    {XSTR_SIZEOF("B-192"),   "B-192",   NID_brainpoolP192r1},
    {XSTR_SIZEOF("B-224"),   "B-224",   NID_brainpoolP224r1},
    {XSTR_SIZEOF("B-256"),   "B-256",   NID_brainpoolP256r1},
    {XSTR_SIZEOF("B-320"),   "B-320",   NID_brainpoolP320r1},
    {XSTR_SIZEOF("B-384"),   "B-384",   NID_brainpoolP384r1},
    {XSTR_SIZEOF("B-512"),   "B-512",   NID_brainpoolP512r1},
    {0,                     NULL,      0},
};
#endif

#if defined(WOLFSSL_RENESAS_TSIP_TLS)
    /* for root ca verification */
int tsip_tls_RootCertVerify(const byte *cert, word32 cert_len,
                            word32 key_n_start, word32 key_n_len,
                            word32 key_e_start, word32 key_e_len,
                            word32 cm_row);
byte tsip_rootCAverified( );
#endif

#ifdef WOLFSSL_SESSION_EXPORT
#ifdef WOLFSSL_DTLS
int wolfSSL_dtls_import(WOLFSSL* ssl, const unsigned char* buf, unsigned int sz)
{
    WOLFSSL_ENTER("wolfSSL_session_import");

    if (ssl == NULL || buf == NULL) {
        return BAD_FUNC_ARG;
    }

    /* sanity checks on buffer and protocol are done in internal function */
    return wolfSSL_dtls_import_internal(ssl, buf, sz);
}


/* Sets the function to call for serializing the session. This function is
 * called right after the handshake is completed. */
int wolfSSL_CTX_dtls_set_export(WOLFSSL_CTX* ctx, wc_dtls_export func)
{

    WOLFSSL_ENTER("wolfSSL_CTX_dtls_set_export");

    /* purposefully allow func to be NULL */
    if (ctx == NULL) {
        return BAD_FUNC_ARG;
    }

    ctx->dtls_export = func;

    return WOLFSSL_SUCCESS;
}


/* Sets the function in WOLFSSL struct to call for serializing the session. This
 * function is called right after the handshake is completed. */
int wolfSSL_dtls_set_export(WOLFSSL* ssl, wc_dtls_export func)
{

    WOLFSSL_ENTER("wolfSSL_dtls_set_export");

    /* purposefully allow func to be NULL */
    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    ssl->dtls_export = func;

    return WOLFSSL_SUCCESS;
}


/* This function allows for directly serializing a session rather than using
 * callbacks. It has less overhead by removing a temporary buffer and gives
 * control over when the session gets serialized. When using callbacks the
 * session is always serialized immediately after the handshake is finished.
 *
 * buf is the argument to contain the serialized session
 * sz  is the size of the buffer passed in
 * ssl is the WOLFSSL struct to serialize
 * returns the size of serialized session on success, 0 on no action, and
 *         negative value on error */
int wolfSSL_dtls_export(WOLFSSL* ssl, unsigned char* buf, unsigned int* sz)
{
    WOLFSSL_ENTER("wolfSSL_dtls_export");

    if (ssl == NULL || sz == NULL) {
        return BAD_FUNC_ARG;
    }

    if (buf == NULL) {
        *sz = MAX_EXPORT_BUFFER;
        return 0;
    }

    /* if not DTLS do nothing */
    if (!ssl->options.dtls) {
        WOLFSSL_MSG("Currently only DTLS export is supported");
        return 0;
    }

    /* copy over keys, options, and dtls state struct */
    return wolfSSL_dtls_export_internal(ssl, buf, *sz);
}


/* This function is similar to wolfSSL_dtls_export but only exports the portion
 * of the WOLFSSL structure related to the state of the connection, i.e. peer
 * sequence number, epoch, AEAD state etc.
 *
 * buf is the argument to contain the serialized state, if null then set "sz" to
 *     buffer size required
 * sz  is the size of the buffer passed in
 * ssl is the WOLFSSL struct to serialize
 * returns the size of serialized session on success, 0 on no action, and
 *         negative value on error */
int wolfSSL_dtls_export_state_only(WOLFSSL* ssl, unsigned char* buf,
        unsigned int* sz)
{
    WOLFSSL_ENTER("wolfSSL_dtls_export_state_only");

    if (ssl == NULL || sz == NULL) {
        return BAD_FUNC_ARG;
    }

    if (buf == NULL) {
        *sz = MAX_EXPORT_STATE_BUFFER;
        return 0;
    }

    /* if not DTLS do nothing */
    if (!ssl->options.dtls) {
        WOLFSSL_MSG("Currently only DTLS export state is supported");
        return 0;
    }

    /* copy over keys, options, and dtls state struct */
    return wolfSSL_dtls_export_state_internal(ssl, buf, *sz);
}


/* returns 0 on success */
int wolfSSL_send_session(WOLFSSL* ssl)
{
    int ret;
    byte* buf;
    word16 bufSz = MAX_EXPORT_BUFFER;

    WOLFSSL_ENTER("wolfSSL_send_session");

    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    buf = (byte*)XMALLOC(bufSz, ssl->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (buf == NULL) {
        return MEMORY_E;
    }

    /* if not DTLS do nothing */
    if (!ssl->options.dtls) {
        XFREE(buf, ssl->heap, DYNAMIC_TYPE_TMP_BUFFER);
        WOLFSSL_MSG("Currently only DTLS export is supported");
        return 0;
    }

    /* copy over keys, options, and dtls state struct */
    ret = wolfSSL_dtls_export_internal(ssl, buf, bufSz);
    if (ret < 0) {
        XFREE(buf, ssl->heap, DYNAMIC_TYPE_TMP_BUFFER);
        return ret;
    }

    /* if no error ret has size of buffer */
    ret = ssl->dtls_export(ssl, buf, ret, NULL);
    if (ret != WOLFSSL_SUCCESS) {
        XFREE(buf, ssl->heap, DYNAMIC_TYPE_TMP_BUFFER);
        return ret;
    }

    XFREE(buf, ssl->heap, DYNAMIC_TYPE_TMP_BUFFER);
    return 0;
}
#endif /* WOLFSSL_DTLS */
#endif /* WOLFSSL_SESSION_EXPORT */

/* prevent multiple mutex initializations */
static volatile WOLFSSL_GLOBAL int initRefCount = 0;
static WOLFSSL_GLOBAL wolfSSL_Mutex count_mutex;   /* init ref count mutex */

/* Create a new WOLFSSL_CTX struct and return the pointer to created struct.
   WOLFSSL_METHOD pointer passed in is given to ctx to manage.
   This function frees the passed in WOLFSSL_METHOD struct on failure and on
   success is freed when ctx is freed.
 */
WOLFSSL_CTX* wolfSSL_CTX_new_ex(WOLFSSL_METHOD* method, void* heap)
{
    WOLFSSL_CTX* ctx = NULL;

    WOLFSSL_ENTER("wolfSSL_CTX_new_ex");

    if (initRefCount == 0) {
        /* user no longer forced to call Init themselves */
        int ret = wolfSSL_Init();
        if (ret != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("wolfSSL_Init failed");
            WOLFSSL_LEAVE("WOLFSSL_CTX_new", 0);
            if (method != NULL) {
                XFREE(method, heap, DYNAMIC_TYPE_METHOD);
            }
            return NULL;
        }
    }

    if (method == NULL)
        return ctx;

    ctx = (WOLFSSL_CTX*) XMALLOC(sizeof(WOLFSSL_CTX), heap, DYNAMIC_TYPE_CTX);
    if (ctx) {
        int ret;

        ret = InitSSL_Ctx(ctx, method, heap);
    #ifdef WOLFSSL_STATIC_MEMORY
        if (heap != NULL) {
            ctx->onHeap = 1; /* free the memory back to heap when done */
        }
    #endif
        if (ret < 0) {
            WOLFSSL_MSG("Init CTX failed");
            wolfSSL_CTX_free(ctx);
            ctx = NULL;
        }
#if defined(OPENSSL_EXTRA) && defined(WOLFCRYPT_HAVE_SRP) \
                           && !defined(NO_SHA256) && !defined(WC_NO_RNG)
        else {
            ctx->srp = (Srp*)XMALLOC(sizeof(Srp), heap, DYNAMIC_TYPE_SRP);
            if (ctx->srp == NULL){
                WOLFSSL_MSG("Init CTX failed");
                wolfSSL_CTX_free(ctx);
                return NULL;
            }
            XMEMSET(ctx->srp, 0, sizeof(Srp));
        }
#endif
    }
    else {
        WOLFSSL_MSG("Alloc CTX failed, method freed");
        XFREE(method, heap, DYNAMIC_TYPE_METHOD);
    }


    WOLFSSL_LEAVE("WOLFSSL_CTX_new", 0);
    return ctx;
}


WOLFSSL_ABI
WOLFSSL_CTX* wolfSSL_CTX_new(WOLFSSL_METHOD* method)
{
#ifdef WOLFSSL_HEAP_TEST
    /* if testing the heap hint then set top level CTX to have test value */
    return wolfSSL_CTX_new_ex(method, (void*)WOLFSSL_HEAP_TEST);
#else
    return wolfSSL_CTX_new_ex(method, NULL);
#endif
}

#ifdef OPENSSL_EXTRA
/* increases CTX reference count to track proper time to "free" */
int wolfSSL_CTX_up_ref(WOLFSSL_CTX* ctx)
{
    int refCount = SSL_CTX_RefCount(ctx, 1);
    return ((refCount > 1) ? WOLFSSL_SUCCESS : WOLFSSL_FAILURE);
}
#endif

WOLFSSL_ABI
void wolfSSL_CTX_free(WOLFSSL_CTX* ctx)
{
    WOLFSSL_ENTER("SSL_CTX_free");
    if (ctx) {
#if defined(OPENSSL_EXTRA) && defined(WOLFCRYPT_HAVE_SRP) \
&& !defined(NO_SHA256) && !defined(WC_NO_RNG)
        if (ctx->srp != NULL) {
            if (ctx->srp_password != NULL){
                XFREE(ctx->srp_password, ctx->heap, DYNAMIC_TYPE_SRP);
                ctx->srp_password = NULL;
            }
            wc_SrpTerm(ctx->srp);
            XFREE(ctx->srp, ctx->heap, DYNAMIC_TYPE_SRP);
            ctx->srp = NULL;
        }
#endif
        FreeSSL_Ctx(ctx);
    }

    WOLFSSL_LEAVE("SSL_CTX_free", 0);
}


#ifdef HAVE_ENCRYPT_THEN_MAC
/**
 * Sets whether Encrypt-Then-MAC extension can be negotiated against context.
 * The default value: enabled.
 *
 * ctx  SSL/TLS context.
 * set  Whether to allow or not: 1 is allow and 0 is disallow.
 * returns WOLFSSL_SUCCESS
 */
int wolfSSL_CTX_AllowEncryptThenMac(WOLFSSL_CTX *ctx, int set)
{
    ctx->disallowEncThenMac = !set;
    return WOLFSSL_SUCCESS;
}

/**
 * Sets whether Encrypt-Then-MAC extension can be negotiated against context.
 * The default value comes from context.
 *
 * ctx  SSL/TLS context.
 * set  Whether to allow or not: 1 is allow and 0 is disallow.
 * returns WOLFSSL_SUCCESS
 */
int wolfSSL_AllowEncryptThenMac(WOLFSSL *ssl, int set)
{
    ssl->options.disallowEncThenMac = !set;
    return WOLFSSL_SUCCESS;
}
#endif

#ifdef SINGLE_THREADED
/* no locking in single threaded mode, allow a CTX level rng to be shared with
 * WOLFSSL objects, WOLFSSL_SUCCESS on ok */
int wolfSSL_CTX_new_rng(WOLFSSL_CTX* ctx)
{
    WC_RNG* rng;
    int     ret;

    if (ctx == NULL) {
        return BAD_FUNC_ARG;
    }

    rng = (WC_RNG*)XMALLOC(sizeof(WC_RNG), ctx->heap, DYNAMIC_TYPE_RNG);
    if (rng == NULL) {
        return MEMORY_E;
    }

#ifndef HAVE_FIPS
    ret = wc_InitRng_ex(rng, ctx->heap, ctx->devId);
#else
    ret = wc_InitRng(rng);
#endif
    if (ret != 0) {
        XFREE(rng, ctx->heap, DYNAMIC_TYPE_RNG);
        return ret;
    }

    ctx->rng = rng;
    return WOLFSSL_SUCCESS;
}
#endif


WOLFSSL_ABI
WOLFSSL* wolfSSL_new(WOLFSSL_CTX* ctx)
{
    WOLFSSL* ssl = NULL;
    int ret = 0;

    WOLFSSL_ENTER("SSL_new");

    if (ctx == NULL)
        return ssl;

    ssl = (WOLFSSL*) XMALLOC(sizeof(WOLFSSL), ctx->heap, DYNAMIC_TYPE_SSL);
    if (ssl)
        if ( (ret = InitSSL(ssl, ctx, 0)) < 0) {
            FreeSSL(ssl, ctx->heap);
            ssl = 0;
        }

    WOLFSSL_LEAVE("SSL_new", ret);
    (void)ret;

    return ssl;
}


WOLFSSL_ABI
void wolfSSL_free(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("SSL_free");
    if (ssl)
        FreeSSL(ssl, ssl->ctx->heap);
    WOLFSSL_LEAVE("SSL_free", 0);
}


int wolfSSL_is_server(WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;
    return ssl->options.side == WOLFSSL_SERVER_END;
}

#ifdef HAVE_WRITE_DUP

/*
 * Release resources around WriteDup object
 *
 * ssl WOLFSSL object
 *
 * no return, destruction so make best attempt
*/
void FreeWriteDup(WOLFSSL* ssl)
{
    int doFree = 0;

    WOLFSSL_ENTER("FreeWriteDup");

    if (ssl->dupWrite) {
        if (wc_LockMutex(&ssl->dupWrite->dupMutex) == 0) {
            ssl->dupWrite->dupCount--;
            if (ssl->dupWrite->dupCount == 0) {
                doFree = 1;
            } else {
                WOLFSSL_MSG("WriteDup count not zero, no full free");
            }
            wc_UnLockMutex(&ssl->dupWrite->dupMutex);
        }
    }

    if (doFree) {
        WOLFSSL_MSG("Doing WriteDup full free, count to zero");
        wc_FreeMutex(&ssl->dupWrite->dupMutex);
        XFREE(ssl->dupWrite, ssl->heap, DYNAMIC_TYPE_WRITEDUP);
    }
}


/*
 * duplicate existing ssl members into dup needed for writing
 *
 * dup write only WOLFSSL
 * ssl existing WOLFSSL
 *
 * 0 on success
*/
static int DupSSL(WOLFSSL* dup, WOLFSSL* ssl)
{
    /* shared dupWrite setup */
    ssl->dupWrite = (WriteDup*)XMALLOC(sizeof(WriteDup), ssl->heap,
                                       DYNAMIC_TYPE_WRITEDUP);
    if (ssl->dupWrite == NULL) {
        return MEMORY_E;
    }
    XMEMSET(ssl->dupWrite, 0, sizeof(WriteDup));

    if (wc_InitMutex(&ssl->dupWrite->dupMutex) != 0) {
        XFREE(ssl->dupWrite, ssl->heap, DYNAMIC_TYPE_WRITEDUP);
        ssl->dupWrite = NULL;
        return BAD_MUTEX_E;
    }
    ssl->dupWrite->dupCount = 2;    /* both sides have a count to start */
    dup->dupWrite = ssl->dupWrite; /* each side uses */

    /* copy write parts over to dup writer */
    XMEMCPY(&dup->specs,   &ssl->specs,   sizeof(CipherSpecs));
    XMEMCPY(&dup->options, &ssl->options, sizeof(Options));
    XMEMCPY(&dup->keys,    &ssl->keys,    sizeof(Keys));
    XMEMCPY(&dup->encrypt, &ssl->encrypt, sizeof(Ciphers));
    /* dup side now owns encrypt/write ciphers */
    XMEMSET(&ssl->encrypt, 0, sizeof(Ciphers));

    dup->IOCB_WriteCtx = ssl->IOCB_WriteCtx;
    dup->wfd    = ssl->wfd;
    dup->wflags = ssl->wflags;
    dup->hmac   = ssl->hmac;
#ifdef HAVE_TRUNCATED_HMAC
    dup->truncated_hmac = ssl->truncated_hmac;
#endif

    /* unique side dup setup */
    dup->dupSide = WRITE_DUP_SIDE;
    ssl->dupSide = READ_DUP_SIDE;

    return 0;
}


/*
 * duplicate a WOLFSSL object post handshake for writing only
 * turn existing object into read only.  Allows concurrent access from two
 * different threads.
 *
 * ssl existing WOLFSSL object
 *
 * return dup'd WOLFSSL object on success
*/
WOLFSSL* wolfSSL_write_dup(WOLFSSL* ssl)
{
    WOLFSSL* dup = NULL;
    int ret = 0;

    (void)ret;
    WOLFSSL_ENTER("wolfSSL_write_dup");

    if (ssl == NULL) {
        return ssl;
    }

    if (ssl->options.handShakeDone == 0) {
        WOLFSSL_MSG("wolfSSL_write_dup called before handshake complete");
        return NULL;
    }

    if (ssl->dupWrite) {
        WOLFSSL_MSG("wolfSSL_write_dup already called once");
        return NULL;
    }

    dup = (WOLFSSL*) XMALLOC(sizeof(WOLFSSL), ssl->ctx->heap, DYNAMIC_TYPE_SSL);
    if (dup) {
        if ( (ret = InitSSL(dup, ssl->ctx, 1)) < 0) {
            FreeSSL(dup, ssl->ctx->heap);
            dup = NULL;
        } else if ( (ret = DupSSL(dup, ssl)) < 0) {
            FreeSSL(dup, ssl->ctx->heap);
            dup = NULL;
        }
    }

    WOLFSSL_LEAVE("wolfSSL_write_dup", ret);

    return dup;
}


/*
 * Notify write dup side of fatal error or close notify
 *
 * ssl WOLFSSL object
 * err Notify err
 *
 * 0 on success
*/
int NotifyWriteSide(WOLFSSL* ssl, int err)
{
    int ret;

    WOLFSSL_ENTER("NotifyWriteSide");

    ret = wc_LockMutex(&ssl->dupWrite->dupMutex);
    if (ret == 0) {
        ssl->dupWrite->dupErr = err;
        ret = wc_UnLockMutex(&ssl->dupWrite->dupMutex);
    }

    return ret;
}


#endif /* HAVE_WRITE_DUP */


#ifdef HAVE_POLY1305
/* set if to use old poly 1 for yes 0 to use new poly */
int wolfSSL_use_old_poly(WOLFSSL* ssl, int value)
{
    (void)ssl;
    (void)value;

#ifndef WOLFSSL_NO_TLS12
    WOLFSSL_ENTER("SSL_use_old_poly");
    WOLFSSL_MSG("Warning SSL connection auto detects old/new and this function"
            "is depreciated");
    ssl->options.oldPoly = (word16)value;
    WOLFSSL_LEAVE("SSL_use_old_poly", 0);
#endif
    return 0;
}
#endif


WOLFSSL_ABI
int wolfSSL_set_fd(WOLFSSL* ssl, int fd)
{
    int ret;

    WOLFSSL_ENTER("SSL_set_fd");

    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    ret = wolfSSL_set_read_fd(ssl, fd);
    if (ret == WOLFSSL_SUCCESS) {
        ret = wolfSSL_set_write_fd(ssl, fd);
    }

    return ret;
}


int wolfSSL_set_read_fd(WOLFSSL* ssl, int fd)
{
    WOLFSSL_ENTER("SSL_set_read_fd");

    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    ssl->rfd = fd;      /* not used directly to allow IO callbacks */
    ssl->IOCB_ReadCtx  = &ssl->rfd;

    #ifdef WOLFSSL_DTLS
        if (ssl->options.dtls) {
            ssl->IOCB_ReadCtx = &ssl->buffers.dtlsCtx;
            ssl->buffers.dtlsCtx.rfd = fd;
        }
    #endif

    WOLFSSL_LEAVE("SSL_set_read_fd", WOLFSSL_SUCCESS);
    return WOLFSSL_SUCCESS;
}


int wolfSSL_set_write_fd(WOLFSSL* ssl, int fd)
{
    WOLFSSL_ENTER("SSL_set_write_fd");

    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    ssl->wfd = fd;      /* not used directly to allow IO callbacks */
    ssl->IOCB_WriteCtx  = &ssl->wfd;

    #ifdef WOLFSSL_DTLS
        if (ssl->options.dtls) {
            ssl->IOCB_WriteCtx = &ssl->buffers.dtlsCtx;
            ssl->buffers.dtlsCtx.wfd = fd;
        }
    #endif

    WOLFSSL_LEAVE("SSL_set_write_fd", WOLFSSL_SUCCESS);
    return WOLFSSL_SUCCESS;
}


/**
  * Get the name of cipher at priority level passed in.
  */
char* wolfSSL_get_cipher_list(int priority)
{
    const CipherSuiteInfo* ciphers = GetCipherNames();

    if (priority >= GetCipherNamesSize() || priority < 0) {
        return 0;
    }

    return (char*)ciphers[priority].name;
}


/**
  * Get the name of cipher at priority level passed in.
  */
char* wolfSSL_get_cipher_list_ex(WOLFSSL* ssl, int priority)
{

    if (ssl == NULL) {
        return NULL;
    }
    else {
        const char* cipher;

        if ((cipher = wolfSSL_get_cipher_name_internal(ssl)) != NULL) {
            if (priority == 0) {
                return (char*)cipher;
            }
            else {
                return NULL;
            }
        }
        else {
            return wolfSSL_get_cipher_list(priority);
        }
    }
}


int wolfSSL_get_ciphers(char* buf, int len)
{
    const CipherSuiteInfo* ciphers = GetCipherNames();
    int ciphersSz = GetCipherNamesSize();
    int i;
    int cipherNameSz;

    if (buf == NULL || len <= 0)
        return BAD_FUNC_ARG;

    /* Add each member to the buffer delimited by a : */
    for (i = 0; i < ciphersSz; i++) {
        cipherNameSz = (int)XSTRLEN(ciphers[i].name);
        if (cipherNameSz + 1 < len) {
            XSTRNCPY(buf, ciphers[i].name, len);
            buf += cipherNameSz;

            if (i < ciphersSz - 1)
                *buf++ = ':';
            *buf = 0;

            len -= cipherNameSz + 1;
        }
        else
            return BUFFER_E;
    }
    return WOLFSSL_SUCCESS;
}


#ifndef NO_ERROR_STRINGS
/* places a list of all supported cipher suites in TLS_* format into "buf"
 * return WOLFSSL_SUCCESS on success */
int wolfSSL_get_ciphers_iana(char* buf, int len)
{
    const CipherSuiteInfo* ciphers = GetCipherNames();
    int ciphersSz = GetCipherNamesSize();
    int i;
    int cipherNameSz;

    if (buf == NULL || len <= 0)
        return BAD_FUNC_ARG;

    /* Add each member to the buffer delimited by a : */
    for (i = 0; i < ciphersSz; i++) {
#ifndef NO_CIPHER_SUITE_ALIASES
        if (ciphers[i].flags & WOLFSSL_CIPHER_SUITE_FLAG_NAMEALIAS)
            continue;
#endif
        cipherNameSz = (int)XSTRLEN(ciphers[i].name_iana);
        if (cipherNameSz + 1 < len) {
            XSTRNCPY(buf, ciphers[i].name_iana, len);
            buf += cipherNameSz;

            if (i < ciphersSz - 1)
                *buf++ = ':';
            *buf = 0;

            len -= cipherNameSz + 1;
        }
        else
            return BUFFER_E;
    }
    return WOLFSSL_SUCCESS;
}
#endif /* NO_ERROR_STRINGS */


const char* wolfSSL_get_shared_ciphers(WOLFSSL* ssl, char* buf, int len)
{
    const char* cipher;

    if (ssl == NULL)
        return NULL;

    cipher = wolfSSL_get_cipher_name_iana(ssl);
    len = min(len, (int)(XSTRLEN(cipher) + 1));
    XMEMCPY(buf, cipher, len);
    return buf;
}

int wolfSSL_get_fd(const WOLFSSL* ssl)
{
    int fd = -1;
    WOLFSSL_ENTER("SSL_get_fd");
    if (ssl) {
        fd = ssl->rfd;
    }
    WOLFSSL_LEAVE("SSL_get_fd", fd);
    return fd;
}


int wolfSSL_dtls(WOLFSSL* ssl)
{
    int dtlsOpt = 0;
    if (ssl)
        dtlsOpt = ssl->options.dtls;
    return dtlsOpt;
}

#if !defined(NO_CERTS)
/* Set whether mutual authentication is required for connections.
 * Server side only.
 *
 * ctx  The SSL/TLS CTX object.
 * req  1 to indicate required and 0 when not.
 * returns BAD_FUNC_ARG when ctx is NULL, SIDE_ERROR when not a server and
 * 0 on success.
 */
int wolfSSL_CTX_mutual_auth(WOLFSSL_CTX* ctx, int req)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;
    if (ctx->method->side == WOLFSSL_CLIENT_END)
        return SIDE_ERROR;

    ctx->mutualAuth = (byte)req;

    return 0;
}

/* Set whether mutual authentication is required for the connection.
 * Server side only.
 *
 * ssl  The SSL/TLS object.
 * req  1 to indicate required and 0 when not.
 * returns BAD_FUNC_ARG when ssl is NULL, or not using TLS v1.3,
 * SIDE_ERROR when not a client and 0 on success.
 */
int wolfSSL_mutual_auth(WOLFSSL* ssl, int req)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;
    if (ssl->options.side == WOLFSSL_SERVER_END)
        return SIDE_ERROR;

    ssl->options.mutualAuth = (word16)req;

    return 0;
}
#endif /* NO_CERTS */

#ifdef WOLFSSL_WOLFSENTRY_HOOKS

int wolfSSL_CTX_set_AcceptFilter(
    WOLFSSL_CTX *ctx,
    NetworkFilterCallback_t AcceptFilter,
    void *AcceptFilter_arg)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;
    ctx->AcceptFilter = AcceptFilter;
    ctx->AcceptFilter_arg = AcceptFilter_arg;
    return 0;
}

int wolfSSL_set_AcceptFilter(
    WOLFSSL *ssl,
    NetworkFilterCallback_t AcceptFilter,
    void *AcceptFilter_arg)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;
    ssl->AcceptFilter = AcceptFilter;
    ssl->AcceptFilter_arg = AcceptFilter_arg;
    return 0;
}

int wolfSSL_CTX_set_ConnectFilter(
    WOLFSSL_CTX *ctx,
    NetworkFilterCallback_t ConnectFilter,
    void *ConnectFilter_arg)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;
    ctx->ConnectFilter = ConnectFilter;
    ctx->ConnectFilter_arg = ConnectFilter_arg;
    return 0;
}

int wolfSSL_set_ConnectFilter(
    WOLFSSL *ssl,
    NetworkFilterCallback_t ConnectFilter,
    void *ConnectFilter_arg)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;
    ssl->ConnectFilter = ConnectFilter;
    ssl->ConnectFilter_arg = ConnectFilter_arg;
    return 0;
}

#endif /* WOLFSSL_WOLFSENTRY_HOOKS */

#ifndef WOLFSSL_LEANPSK
int wolfSSL_dtls_set_peer(WOLFSSL* ssl, void* peer, unsigned int peerSz)
{
#ifdef WOLFSSL_DTLS
    void* sa;

    if (ssl == NULL)
        return WOLFSSL_FAILURE;

    sa = (void*)XMALLOC(peerSz, ssl->heap, DYNAMIC_TYPE_SOCKADDR);
    if (sa != NULL) {
        if (ssl->buffers.dtlsCtx.peer.sa != NULL) {
            XFREE(ssl->buffers.dtlsCtx.peer.sa,ssl->heap,DYNAMIC_TYPE_SOCKADDR);
            ssl->buffers.dtlsCtx.peer.sa = NULL;
        }
        XMEMCPY(sa, peer, peerSz);
        ssl->buffers.dtlsCtx.peer.sa = sa;
        ssl->buffers.dtlsCtx.peer.sz = peerSz;
        return WOLFSSL_SUCCESS;
    }
    return WOLFSSL_FAILURE;
#else
    (void)ssl;
    (void)peer;
    (void)peerSz;
    return WOLFSSL_NOT_IMPLEMENTED;
#endif
}

int wolfSSL_dtls_get_peer(WOLFSSL* ssl, void* peer, unsigned int* peerSz)
{
#ifdef WOLFSSL_DTLS
    if (ssl == NULL) {
        return WOLFSSL_FAILURE;
    }

    if (peer != NULL && peerSz != NULL
            && *peerSz >= ssl->buffers.dtlsCtx.peer.sz
            && ssl->buffers.dtlsCtx.peer.sa != NULL) {
        *peerSz = ssl->buffers.dtlsCtx.peer.sz;
        XMEMCPY(peer, ssl->buffers.dtlsCtx.peer.sa, *peerSz);
        return WOLFSSL_SUCCESS;
    }
    return WOLFSSL_FAILURE;
#else
    (void)ssl;
    (void)peer;
    (void)peerSz;
    return WOLFSSL_NOT_IMPLEMENTED;
#endif
}


#if defined(WOLFSSL_SCTP) && defined(WOLFSSL_DTLS)

int wolfSSL_CTX_dtls_set_sctp(WOLFSSL_CTX* ctx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_dtls_set_sctp()");

    if (ctx == NULL)
        return BAD_FUNC_ARG;

    ctx->dtlsSctp = 1;
    return WOLFSSL_SUCCESS;
}


int wolfSSL_dtls_set_sctp(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_dtls_set_sctp()");

    if (ssl == NULL)
        return BAD_FUNC_ARG;

    ssl->options.dtlsSctp = 1;
    return WOLFSSL_SUCCESS;
}

#endif /* WOLFSSL_DTLS && WOLFSSL_SCTP */

#if (defined(WOLFSSL_SCTP) || defined(WOLFSSL_DTLS_MTU)) && \
                                                           defined(WOLFSSL_DTLS)

int wolfSSL_CTX_dtls_set_mtu(WOLFSSL_CTX* ctx, word16 newMtu)
{
    if (ctx == NULL || newMtu > MAX_RECORD_SIZE)
        return BAD_FUNC_ARG;

    ctx->dtlsMtuSz = newMtu;
    return WOLFSSL_SUCCESS;
}


int wolfSSL_dtls_set_mtu(WOLFSSL* ssl, word16 newMtu)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    if (newMtu > MAX_RECORD_SIZE) {
        ssl->error = BAD_FUNC_ARG;
        return WOLFSSL_FAILURE;
    }

    ssl->dtlsMtuSz = newMtu;
    return WOLFSSL_SUCCESS;
}

#endif /* WOLFSSL_DTLS && (WOLFSSL_SCTP || WOLFSSL_DTLS_MTU) */


#ifdef WOLFSSL_DTLS_DROP_STATS

int wolfSSL_dtls_get_drop_stats(WOLFSSL* ssl,
                                word32* macDropCount, word32* replayDropCount)
{
    int ret;

    WOLFSSL_ENTER("wolfSSL_dtls_get_drop_stats()");

    if (ssl == NULL)
        ret = BAD_FUNC_ARG;
    else {
        ret = WOLFSSL_SUCCESS;
        if (macDropCount != NULL)
            *macDropCount = ssl->macDropCount;
        if (replayDropCount != NULL)
            *replayDropCount = ssl->replayDropCount;
    }

    WOLFSSL_LEAVE("wolfSSL_dtls_get_drop_stats()", ret);
    return ret;
}

#endif /* WOLFSSL_DTLS_DROP_STATS */


#if defined(WOLFSSL_MULTICAST)

int wolfSSL_CTX_mcast_set_member_id(WOLFSSL_CTX* ctx, word16 id)
{
    int ret = 0;

    WOLFSSL_ENTER("wolfSSL_CTX_mcast_set_member_id()");

    if (ctx == NULL || id > 255)
        ret = BAD_FUNC_ARG;

    if (ret == 0) {
        ctx->haveEMS = 0;
        ctx->haveMcast = 1;
        ctx->mcastID = (byte)id;
#ifndef WOLFSSL_USER_IO
        ctx->CBIORecv = EmbedReceiveFromMcast;
#endif /* WOLFSSL_USER_IO */

        ret = WOLFSSL_SUCCESS;
    }
    WOLFSSL_LEAVE("wolfSSL_CTX_mcast_set_member_id()", ret);
    return ret;
}

int wolfSSL_mcast_get_max_peers(void)
{
    return WOLFSSL_MULTICAST_PEERS;
}

#ifdef WOLFSSL_DTLS
static WC_INLINE word32 UpdateHighwaterMark(word32 cur, word32 first,
                                         word32 second, word32 high)
{
    word32 newCur = 0;

    if (cur < first)
        newCur = first;
    else if (cur < second)
        newCur = second;
    else if (cur < high)
        newCur = high;

    return newCur;
}
#endif /* WOLFSSL_DTLS */


int wolfSSL_set_secret(WOLFSSL* ssl, word16 epoch,
                       const byte* preMasterSecret, word32 preMasterSz,
                       const byte* clientRandom, const byte* serverRandom,
                       const byte* suite)
{
    int ret = 0;

    WOLFSSL_ENTER("wolfSSL_set_secret()");

    if (ssl == NULL || preMasterSecret == NULL ||
        preMasterSz == 0 || preMasterSz > ENCRYPT_LEN ||
        clientRandom == NULL || serverRandom == NULL || suite == NULL) {

        ret = BAD_FUNC_ARG;
    }

    if (ret == 0) {
        XMEMCPY(ssl->arrays->preMasterSecret, preMasterSecret, preMasterSz);
        ssl->arrays->preMasterSz = preMasterSz;
        XMEMCPY(ssl->arrays->clientRandom, clientRandom, RAN_LEN);
        XMEMCPY(ssl->arrays->serverRandom, serverRandom, RAN_LEN);
        ssl->options.cipherSuite0 = suite[0];
        ssl->options.cipherSuite = suite[1];

        ret = SetCipherSpecs(ssl);
    }

    if (ret == 0)
        ret = MakeTlsMasterSecret(ssl);

    if (ret == 0) {
        ssl->keys.encryptionOn = 1;
        ret = SetKeysSide(ssl, ENCRYPT_AND_DECRYPT_SIDE);
    }

    if (ret == 0) {
        if (ssl->options.dtls) {
        #ifdef WOLFSSL_DTLS
            WOLFSSL_DTLS_PEERSEQ* peerSeq;
            int i;

            ssl->keys.dtls_epoch = epoch;
            for (i = 0, peerSeq = ssl->keys.peerSeq;
                 i < WOLFSSL_DTLS_PEERSEQ_SZ;
                 i++, peerSeq++) {

                peerSeq->nextEpoch = epoch;
                peerSeq->prevSeq_lo = peerSeq->nextSeq_lo;
                peerSeq->prevSeq_hi = peerSeq->nextSeq_hi;
                peerSeq->nextSeq_lo = 0;
                peerSeq->nextSeq_hi = 0;
                XMEMCPY(peerSeq->prevWindow, peerSeq->window, DTLS_SEQ_SZ);
                XMEMSET(peerSeq->window, 0, DTLS_SEQ_SZ);
                peerSeq->highwaterMark = UpdateHighwaterMark(0,
                        ssl->ctx->mcastFirstSeq,
                        ssl->ctx->mcastSecondSeq,
                        ssl->ctx->mcastMaxSeq);
            }
        #else
            (void)epoch;
        #endif
        }
        FreeHandshakeResources(ssl);
        ret = WOLFSSL_SUCCESS;
    }
    else {
        if (ssl)
            ssl->error = ret;
        ret = WOLFSSL_FATAL_ERROR;
    }
    WOLFSSL_LEAVE("wolfSSL_set_secret()", ret);
    return ret;
}


#ifdef WOLFSSL_DTLS

int wolfSSL_mcast_peer_add(WOLFSSL* ssl, word16 peerId, int remove)
{
    WOLFSSL_DTLS_PEERSEQ* p = NULL;
    int ret = WOLFSSL_SUCCESS;
    int i;

    WOLFSSL_ENTER("wolfSSL_mcast_peer_add()");
    if (ssl == NULL || peerId > 255)
        return BAD_FUNC_ARG;

    if (!remove) {
        /* Make sure it isn't already present, while keeping the first
         * open spot. */
        for (i = 0; i < WOLFSSL_DTLS_PEERSEQ_SZ; i++) {
            if (ssl->keys.peerSeq[i].peerId == INVALID_PEER_ID)
                p = &ssl->keys.peerSeq[i];
            if (ssl->keys.peerSeq[i].peerId == peerId) {
                WOLFSSL_MSG("Peer ID already in multicast peer list.");
                p = NULL;
            }
        }

        if (p != NULL) {
            XMEMSET(p, 0, sizeof(WOLFSSL_DTLS_PEERSEQ));
            p->peerId = peerId;
            p->highwaterMark = UpdateHighwaterMark(0,
                ssl->ctx->mcastFirstSeq,
                ssl->ctx->mcastSecondSeq,
                ssl->ctx->mcastMaxSeq);
        }
        else {
            WOLFSSL_MSG("No room in peer list.");
            ret = -1;
        }
    }
    else {
        for (i = 0; i < WOLFSSL_DTLS_PEERSEQ_SZ; i++) {
            if (ssl->keys.peerSeq[i].peerId == peerId)
                p = &ssl->keys.peerSeq[i];
        }

        if (p != NULL) {
            p->peerId = INVALID_PEER_ID;
        }
        else {
            WOLFSSL_MSG("Peer not found in list.");
        }
    }

    WOLFSSL_LEAVE("wolfSSL_mcast_peer_add()", ret);
    return ret;
}


/* If peerId is in the list of peers and its last sequence number is non-zero,
 * return 1, otherwise return 0. */
int wolfSSL_mcast_peer_known(WOLFSSL* ssl, unsigned short peerId)
{
    int known = 0;
    int i;

    WOLFSSL_ENTER("wolfSSL_mcast_peer_known()");

    if (ssl == NULL || peerId > 255) {
        return BAD_FUNC_ARG;
    }

    for (i = 0; i < WOLFSSL_DTLS_PEERSEQ_SZ; i++) {
        if (ssl->keys.peerSeq[i].peerId == peerId) {
            if (ssl->keys.peerSeq[i].nextSeq_hi ||
                ssl->keys.peerSeq[i].nextSeq_lo) {

                known = 1;
            }
            break;
        }
    }

    WOLFSSL_LEAVE("wolfSSL_mcast_peer_known()", known);
    return known;
}


int wolfSSL_CTX_mcast_set_highwater_cb(WOLFSSL_CTX* ctx, word32 maxSeq,
                                       word32 first, word32 second,
                                       CallbackMcastHighwater cb)
{
    if (ctx == NULL || (second && first > second) ||
        first > maxSeq || second > maxSeq || cb == NULL) {

        return BAD_FUNC_ARG;
    }

    ctx->mcastHwCb = cb;
    ctx->mcastFirstSeq = first;
    ctx->mcastSecondSeq = second;
    ctx->mcastMaxSeq = maxSeq;

    return WOLFSSL_SUCCESS;
}


int wolfSSL_mcast_set_highwater_ctx(WOLFSSL* ssl, void* ctx)
{
    if (ssl == NULL || ctx == NULL)
        return BAD_FUNC_ARG;

    ssl->mcastHwCbCtx = ctx;

    return WOLFSSL_SUCCESS;
}

#endif /* WOLFSSL_DTLS */

#endif /* WOLFSSL_MULTICAST */


#endif /* WOLFSSL_LEANPSK */


/* return underlying connect or accept, WOLFSSL_SUCCESS on ok */
int wolfSSL_negotiate(WOLFSSL* ssl)
{
    int err = WOLFSSL_FATAL_ERROR;

    WOLFSSL_ENTER("wolfSSL_negotiate");
#ifndef NO_WOLFSSL_SERVER
    if (ssl->options.side == WOLFSSL_SERVER_END) {
#ifdef WOLFSSL_TLS13
        if (IsAtLeastTLSv1_3(ssl->version))
            err = wolfSSL_accept_TLSv13(ssl);
        else
#endif
            err = wolfSSL_accept(ssl);
    }
#endif

#ifndef NO_WOLFSSL_CLIENT
    if (ssl->options.side == WOLFSSL_CLIENT_END) {
#ifdef WOLFSSL_TLS13
        if (IsAtLeastTLSv1_3(ssl->version))
            err = wolfSSL_connect_TLSv13(ssl);
        else
#endif
            err = wolfSSL_connect(ssl);
    }
#endif

    (void)ssl;

    WOLFSSL_LEAVE("wolfSSL_negotiate", err);

    return err;
}


WOLFSSL_ABI
WC_RNG* wolfSSL_GetRNG(WOLFSSL* ssl)
{
    if (ssl) {
        return ssl->rng;
    }

    return NULL;
}


#ifndef WOLFSSL_LEANPSK
/* object size based on build */
int wolfSSL_GetObjectSize(void)
{
#ifdef SHOW_SIZES
    printf("sizeof suites           = %lu\n", (unsigned long)sizeof(Suites));
    printf("sizeof ciphers(2)       = %lu\n", (unsigned long)sizeof(Ciphers));
#ifndef NO_RC4
    printf("\tsizeof arc4         = %lu\n", (unsigned long)sizeof(Arc4));
#endif
    printf("\tsizeof aes          = %lu\n", (unsigned long)sizeof(Aes));
#ifndef NO_DES3
    printf("\tsizeof des3         = %lu\n", (unsigned long)sizeof(Des3));
#endif
#ifndef NO_RABBIT
    printf("\tsizeof rabbit       = %lu\n", (unsigned long)sizeof(Rabbit));
#endif
#ifdef HAVE_CHACHA
    printf("\tsizeof chacha       = %lu\n", (unsigned long)sizeof(ChaCha));
#endif
    printf("sizeof cipher specs     = %lu\n", (unsigned long)sizeof(CipherSpecs));
    printf("sizeof keys             = %lu\n", (unsigned long)sizeof(Keys));
    printf("sizeof Hashes(2)        = %lu\n", (unsigned long)sizeof(Hashes));
#ifndef NO_MD5
    printf("\tsizeof MD5          = %lu\n", (unsigned long)sizeof(wc_Md5));
#endif
#ifndef NO_SHA
    printf("\tsizeof SHA          = %lu\n", (unsigned long)sizeof(wc_Sha));
#endif
#ifdef WOLFSSL_SHA224
    printf("\tsizeof SHA224       = %lu\n", (unsigned long)sizeof(wc_Sha224));
#endif
#ifndef NO_SHA256
    printf("\tsizeof SHA256       = %lu\n", (unsigned long)sizeof(wc_Sha256));
#endif
#ifdef WOLFSSL_SHA384
    printf("\tsizeof SHA384       = %lu\n", (unsigned long)sizeof(wc_Sha384));
#endif
#ifdef WOLFSSL_SHA384
    printf("\tsizeof SHA512       = %lu\n", (unsigned long)sizeof(wc_Sha512));
#endif
    printf("sizeof Buffers          = %lu\n", (unsigned long)sizeof(Buffers));
    printf("sizeof Options          = %lu\n", (unsigned long)sizeof(Options));
    printf("sizeof Arrays           = %lu\n", (unsigned long)sizeof(Arrays));
#ifndef NO_RSA
    printf("sizeof RsaKey           = %lu\n", (unsigned long)sizeof(RsaKey));
#endif
#ifdef HAVE_ECC
    printf("sizeof ecc_key          = %lu\n", (unsigned long)sizeof(ecc_key));
#endif
    printf("sizeof WOLFSSL_CIPHER    = %lu\n", (unsigned long)sizeof(WOLFSSL_CIPHER));
    printf("sizeof WOLFSSL_SESSION   = %lu\n", (unsigned long)sizeof(WOLFSSL_SESSION));
    printf("sizeof WOLFSSL           = %lu\n", (unsigned long)sizeof(WOLFSSL));
    printf("sizeof WOLFSSL_CTX       = %lu\n", (unsigned long)sizeof(WOLFSSL_CTX));
#endif

    return sizeof(WOLFSSL);
}

int wolfSSL_CTX_GetObjectSize(void)
{
    return sizeof(WOLFSSL_CTX);
}

int wolfSSL_METHOD_GetObjectSize(void)
{
    return sizeof(WOLFSSL_METHOD);
}
#endif


#ifdef WOLFSSL_STATIC_MEMORY

int wolfSSL_CTX_load_static_memory(WOLFSSL_CTX** ctx, wolfSSL_method_func method,
                                   unsigned char* buf, unsigned int sz,
                                   int flag, int maxSz)
{
    WOLFSSL_HEAP*      heap;
    WOLFSSL_HEAP_HINT* hint;
    word32 idx = 0;

    if (ctx == NULL || buf == NULL) {
        return BAD_FUNC_ARG;
    }

    if (*ctx == NULL && method == NULL) {
        return BAD_FUNC_ARG;
    }

    if (*ctx == NULL || (*ctx)->heap == NULL) {
        if (sizeof(WOLFSSL_HEAP) + sizeof(WOLFSSL_HEAP_HINT) > sz - idx) {
            return BUFFER_E; /* not enough memory for structures */
        }
        heap = (WOLFSSL_HEAP*)buf;
        idx += sizeof(WOLFSSL_HEAP);
        if (wolfSSL_init_memory_heap(heap) != 0) {
            return WOLFSSL_FAILURE;
        }
        hint = (WOLFSSL_HEAP_HINT*)(buf + idx);
        idx += sizeof(WOLFSSL_HEAP_HINT);
        XMEMSET(hint, 0, sizeof(WOLFSSL_HEAP_HINT));
        hint->memory = heap;

        if (*ctx && (*ctx)->heap == NULL) {
            (*ctx)->heap = (void*)hint;
        }
    }
    else {
#ifdef WOLFSSL_HEAP_TEST
        /* do not load in memory if test has been set */
        if ((*ctx)->heap == (void*)WOLFSSL_HEAP_TEST) {
            return WOLFSSL_SUCCESS;
        }
#endif
        hint = (WOLFSSL_HEAP_HINT*)((*ctx)->heap);
        heap = hint->memory;
    }

    if (wolfSSL_load_static_memory(buf + idx, sz - idx, flag, heap) != 1) {
        WOLFSSL_MSG("Error partitioning memory");
        return WOLFSSL_FAILURE;
    }

    /* create ctx if needed */
    if (*ctx == NULL) {
        *ctx = wolfSSL_CTX_new_ex(method(hint), hint);
        if (*ctx == NULL) {
            WOLFSSL_MSG("Error creating ctx");
            return WOLFSSL_FAILURE;
        }
    }

    /* determine what max applies too */
    if (flag & WOLFMEM_IO_POOL || flag & WOLFMEM_IO_POOL_FIXED) {
        heap->maxIO = maxSz;
    }
    else { /* general memory used in handshakes */
        heap->maxHa = maxSz;
    }

    heap->flag |= flag;

    (void)maxSz;
    (void)method;

    return WOLFSSL_SUCCESS;
}


int wolfSSL_is_static_memory(WOLFSSL* ssl, WOLFSSL_MEM_CONN_STATS* mem_stats)
{
    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }
    WOLFSSL_ENTER("wolfSSL_is_static_memory");

    /* fill out statistics if wanted and WOLFMEM_TRACK_STATS flag */
    if (mem_stats != NULL && ssl->heap != NULL) {
        WOLFSSL_HEAP_HINT* hint = ((WOLFSSL_HEAP_HINT*)(ssl->heap));
        WOLFSSL_HEAP* heap      = hint->memory;
        if (heap->flag & WOLFMEM_TRACK_STATS && hint->stats != NULL) {
            XMEMCPY(mem_stats, hint->stats, sizeof(WOLFSSL_MEM_CONN_STATS));
        }
    }

    return (ssl->heap) ? 1 : 0;
}


int wolfSSL_CTX_is_static_memory(WOLFSSL_CTX* ctx, WOLFSSL_MEM_STATS* mem_stats)
{
    if (ctx == NULL) {
        return BAD_FUNC_ARG;
    }
    WOLFSSL_ENTER("wolfSSL_CTX_is_static_memory");

    /* fill out statistics if wanted */
    if (mem_stats != NULL && ctx->heap != NULL) {
        WOLFSSL_HEAP* heap = ((WOLFSSL_HEAP_HINT*)(ctx->heap))->memory;
        if (wolfSSL_GetMemStats(heap, mem_stats) != 1) {
            return MEMORY_E;
        }
    }

    return (ctx->heap) ? 1 : 0;
}

#endif /* WOLFSSL_STATIC_MEMORY */


/* return max record layer size plaintext input size */
int wolfSSL_GetMaxOutputSize(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_GetMaxOutputSize");

    if (ssl == NULL)
        return BAD_FUNC_ARG;

    if (ssl->options.handShakeState != HANDSHAKE_DONE) {
        WOLFSSL_MSG("Handshake not complete yet");
        return BAD_FUNC_ARG;
    }

    return wolfSSL_GetMaxRecordSize(ssl, OUTPUT_RECORD_SIZE);
}


/* return record layer size of plaintext input size */
int wolfSSL_GetOutputSize(WOLFSSL* ssl, int inSz)
{
    int maxSize;

    WOLFSSL_ENTER("wolfSSL_GetOutputSize");

    if (inSz < 0)
        return BAD_FUNC_ARG;

    maxSize = wolfSSL_GetMaxOutputSize(ssl);
    if (maxSize < 0)
        return maxSize;   /* error */
    if (inSz > maxSize)
        return INPUT_SIZE_E;

    return BuildMessage(ssl, NULL, 0, NULL, inSz, application_data, 0, 1, 0, CUR_ORDER);
}


#ifdef HAVE_ECC
int wolfSSL_CTX_SetMinEccKey_Sz(WOLFSSL_CTX* ctx, short keySz)
{
    if (ctx == NULL || keySz < 0 || keySz % 8 != 0) {
        WOLFSSL_MSG("Key size must be divisible by 8 or ctx was null");
        return BAD_FUNC_ARG;
    }

    ctx->minEccKeySz     = keySz / 8;
#ifndef NO_CERTS
    ctx->cm->minEccKeySz = keySz / 8;
#endif
    return WOLFSSL_SUCCESS;
}


int wolfSSL_SetMinEccKey_Sz(WOLFSSL* ssl, short keySz)
{
    if (ssl == NULL || keySz < 0 || keySz % 8 != 0) {
        WOLFSSL_MSG("Key size must be divisible by 8 or ssl was null");
        return BAD_FUNC_ARG;
    }

    ssl->options.minEccKeySz = keySz / 8;
    return WOLFSSL_SUCCESS;
}

#endif /* HAVE_ECC */

#ifndef NO_RSA
int wolfSSL_CTX_SetMinRsaKey_Sz(WOLFSSL_CTX* ctx, short keySz)
{
    if (ctx == NULL || keySz < 0 || keySz % 8 != 0) {
        WOLFSSL_MSG("Key size must be divisible by 8 or ctx was null");
        return BAD_FUNC_ARG;
    }

    ctx->minRsaKeySz     = keySz / 8;
    ctx->cm->minRsaKeySz = keySz / 8;
    return WOLFSSL_SUCCESS;
}


int wolfSSL_SetMinRsaKey_Sz(WOLFSSL* ssl, short keySz)
{
    if (ssl == NULL || keySz < 0 || keySz % 8 != 0) {
        WOLFSSL_MSG("Key size must be divisible by 8 or ssl was null");
        return BAD_FUNC_ARG;
    }

    ssl->options.minRsaKeySz = keySz / 8;
    return WOLFSSL_SUCCESS;
}
#endif /* !NO_RSA */

#ifndef NO_DH
/* server Diffie-Hellman parameters, WOLFSSL_SUCCESS on ok */
int wolfSSL_SetTmpDH(WOLFSSL* ssl, const unsigned char* p, int pSz,
                    const unsigned char* g, int gSz)
{
    WOLFSSL_ENTER("wolfSSL_SetTmpDH");

    if (ssl == NULL || p == NULL || g == NULL)
        return BAD_FUNC_ARG;

    if ((word16)pSz < ssl->options.minDhKeySz)
        return DH_KEY_SIZE_E;
    if ((word16)pSz > ssl->options.maxDhKeySz)
        return DH_KEY_SIZE_E;

    /* this function is for server only */
    if (ssl->options.side == WOLFSSL_CLIENT_END)
        return SIDE_ERROR;

    #if !defined(WOLFSSL_OLD_PRIME_CHECK) && !defined(HAVE_FIPS) && \
        !defined(HAVE_SELFTEST)
        ssl->options.dhKeyTested = 0;
        ssl->options.dhDoKeyTest = 1;
    #endif

    if (ssl->buffers.serverDH_P.buffer && ssl->buffers.weOwnDH) {
        XFREE(ssl->buffers.serverDH_P.buffer, ssl->heap, DYNAMIC_TYPE_PUBLIC_KEY);
        ssl->buffers.serverDH_P.buffer = NULL;
    }
    if (ssl->buffers.serverDH_G.buffer && ssl->buffers.weOwnDH) {
        XFREE(ssl->buffers.serverDH_G.buffer, ssl->heap, DYNAMIC_TYPE_PUBLIC_KEY);
        ssl->buffers.serverDH_G.buffer = NULL;
    }

    ssl->buffers.weOwnDH = 1;  /* SSL owns now */
    ssl->buffers.serverDH_P.buffer = (byte*)XMALLOC(pSz, ssl->heap,
                                                    DYNAMIC_TYPE_PUBLIC_KEY);
    if (ssl->buffers.serverDH_P.buffer == NULL)
            return MEMORY_E;

    ssl->buffers.serverDH_G.buffer = (byte*)XMALLOC(gSz, ssl->heap,
                                                    DYNAMIC_TYPE_PUBLIC_KEY);
    if (ssl->buffers.serverDH_G.buffer == NULL) {
        XFREE(ssl->buffers.serverDH_P.buffer, ssl->heap, DYNAMIC_TYPE_PUBLIC_KEY);
        ssl->buffers.serverDH_P.buffer = NULL;
        return MEMORY_E;
    }

    ssl->buffers.serverDH_P.length = pSz;
    ssl->buffers.serverDH_G.length = gSz;

    XMEMCPY(ssl->buffers.serverDH_P.buffer, p, pSz);
    XMEMCPY(ssl->buffers.serverDH_G.buffer, g, gSz);

    ssl->options.haveDH = 1;

    if (ssl->options.side != WOLFSSL_NEITHER_END) {
        word16 havePSK;
        word16 haveRSA;
        int    keySz   = 0;

    #ifndef NO_PSK
        havePSK = ssl->options.havePSK;
    #else
        havePSK = 0;
    #endif
    #ifdef NO_RSA
        haveRSA = 0;
    #else
        haveRSA = 1;
    #endif
    #ifndef NO_CERTS
        keySz = ssl->buffers.keySz;
    #endif
        InitSuites(ssl->suites, ssl->version, keySz, haveRSA, havePSK,
                   ssl->options.haveDH, ssl->options.haveNTRU,
                   ssl->options.haveECDSAsig, ssl->options.haveECC,
                   ssl->options.haveStaticECC, ssl->options.haveAnon,
                   ssl->options.side);
    }

    WOLFSSL_LEAVE("wolfSSL_SetTmpDH", 0);

    return WOLFSSL_SUCCESS;
}


#if !defined(WOLFSSL_OLD_PRIME_CHECK) && !defined(HAVE_FIPS) && \
    !defined(HAVE_SELFTEST)
/* Enables or disables the session's DH key prime test. */
int wolfSSL_SetEnableDhKeyTest(WOLFSSL* ssl, int enable)
{
    WOLFSSL_ENTER("wolfSSL_SetEnableDhKeyTest");

    if (ssl == NULL)
        return BAD_FUNC_ARG;

    if (!enable)
        ssl->options.dhDoKeyTest = 0;
    else
        ssl->options.dhDoKeyTest = 1;

    WOLFSSL_LEAVE("wolfSSL_SetEnableDhKeyTest", WOLFSSL_SUCCESS);
    return WOLFSSL_SUCCESS;
}
#endif


/* server ctx Diffie-Hellman parameters, WOLFSSL_SUCCESS on ok */
int wolfSSL_CTX_SetTmpDH(WOLFSSL_CTX* ctx, const unsigned char* p, int pSz,
                         const unsigned char* g, int gSz)
{
    WOLFSSL_ENTER("wolfSSL_CTX_SetTmpDH");
    if (ctx == NULL || p == NULL || g == NULL) return BAD_FUNC_ARG;

    if ((word16)pSz < ctx->minDhKeySz)
        return DH_KEY_SIZE_E;
    if ((word16)pSz > ctx->maxDhKeySz)
        return DH_KEY_SIZE_E;

    #if !defined(WOLFSSL_OLD_PRIME_CHECK) && !defined(HAVE_FIPS) && \
        !defined(HAVE_SELFTEST)
    {
        DhKey checkKey;
        WC_RNG rng;
        int error, freeKey = 0;

        error = wc_InitRng(&rng);
        if (!error)
            error = wc_InitDhKey(&checkKey);
        if (!error) {
            freeKey = 1;
            error = wc_DhSetCheckKey(&checkKey,
                                 p, pSz, g, gSz, NULL, 0, 0, &rng);
        }
        if (freeKey)
            wc_FreeDhKey(&checkKey);
        wc_FreeRng(&rng);
        if (error)
            return error;

        ctx->dhKeyTested = 1;
    }
    #endif

    XFREE(ctx->serverDH_P.buffer, ctx->heap, DYNAMIC_TYPE_PUBLIC_KEY);
    ctx->serverDH_P.buffer = NULL;
    XFREE(ctx->serverDH_G.buffer, ctx->heap, DYNAMIC_TYPE_PUBLIC_KEY);
    ctx->serverDH_G.buffer = NULL;

    ctx->serverDH_P.buffer = (byte*)XMALLOC(pSz, ctx->heap, DYNAMIC_TYPE_PUBLIC_KEY);
    if (ctx->serverDH_P.buffer == NULL)
       return MEMORY_E;

    ctx->serverDH_G.buffer = (byte*)XMALLOC(gSz, ctx->heap, DYNAMIC_TYPE_PUBLIC_KEY);
    if (ctx->serverDH_G.buffer == NULL) {
        XFREE(ctx->serverDH_P.buffer, ctx->heap, DYNAMIC_TYPE_PUBLIC_KEY);
        ctx->serverDH_P.buffer = NULL;
        return MEMORY_E;
    }

    ctx->serverDH_P.length = pSz;
    ctx->serverDH_G.length = gSz;

    XMEMCPY(ctx->serverDH_P.buffer, p, pSz);
    XMEMCPY(ctx->serverDH_G.buffer, g, gSz);

    ctx->haveDH = 1;

    WOLFSSL_LEAVE("wolfSSL_CTX_SetTmpDH", 0);
    return WOLFSSL_SUCCESS;
}


int wolfSSL_CTX_SetMinDhKey_Sz(WOLFSSL_CTX* ctx, word16 keySz_bits)
{
    if (ctx == NULL || keySz_bits > 16000 || keySz_bits % 8 != 0)
        return BAD_FUNC_ARG;

    ctx->minDhKeySz = keySz_bits / 8;
    return WOLFSSL_SUCCESS;
}


int wolfSSL_SetMinDhKey_Sz(WOLFSSL* ssl, word16 keySz_bits)
{
    if (ssl == NULL || keySz_bits > 16000 || keySz_bits % 8 != 0)
        return BAD_FUNC_ARG;

    ssl->options.minDhKeySz = keySz_bits / 8;
    return WOLFSSL_SUCCESS;
}


int wolfSSL_CTX_SetMaxDhKey_Sz(WOLFSSL_CTX* ctx, word16 keySz_bits)
{
    if (ctx == NULL || keySz_bits > 16000 || keySz_bits % 8 != 0)
        return BAD_FUNC_ARG;

    ctx->maxDhKeySz = keySz_bits / 8;
    return WOLFSSL_SUCCESS;
}


int wolfSSL_SetMaxDhKey_Sz(WOLFSSL* ssl, word16 keySz_bits)
{
    if (ssl == NULL || keySz_bits > 16000 || keySz_bits % 8 != 0)
        return BAD_FUNC_ARG;

    ssl->options.maxDhKeySz = keySz_bits / 8;
    return WOLFSSL_SUCCESS;
}


int wolfSSL_GetDhKey_Sz(WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    return (ssl->options.dhKeySz * 8);
}

#endif /* !NO_DH */


WOLFSSL_ABI
int wolfSSL_write(WOLFSSL* ssl, const void* data, int sz)
{
    int ret;

    WOLFSSL_ENTER("SSL_write()");

    if (ssl == NULL || data == NULL || sz < 0)
        return BAD_FUNC_ARG;

#ifdef WOLFSSL_EARLY_DATA
    if (ssl->earlyData != no_early_data && (ret = wolfSSL_negotiate(ssl)) < 0) {
        ssl->error = ret;
        return WOLFSSL_FATAL_ERROR;
    }
    ssl->earlyData = no_early_data;
#endif

#ifdef HAVE_WRITE_DUP
    { /* local variable scope */
        int dupErr = 0;   /* local copy */

        ret = 0;

        if (ssl->dupWrite && ssl->dupSide == READ_DUP_SIDE) {
            WOLFSSL_MSG("Read dup side cannot write");
            return WRITE_DUP_WRITE_E;
        }
        if (ssl->dupWrite) {
            if (wc_LockMutex(&ssl->dupWrite->dupMutex) != 0) {
                return BAD_MUTEX_E;
            }
            dupErr = ssl->dupWrite->dupErr;
            ret = wc_UnLockMutex(&ssl->dupWrite->dupMutex);
        }

        if (ret != 0) {
            ssl->error = ret;  /* high priority fatal error */
            return WOLFSSL_FATAL_ERROR;
        }
        if (dupErr != 0) {
            WOLFSSL_MSG("Write dup error from other side");
            ssl->error = dupErr;
            return WOLFSSL_FATAL_ERROR;
        }
    }
#endif

#ifdef HAVE_ERRNO_H
    errno = 0;
#endif

    #ifdef OPENSSL_EXTRA
    if (ssl->CBIS != NULL) {
        ssl->CBIS(ssl, SSL_CB_WRITE, WOLFSSL_SUCCESS);
        ssl->cbmode = SSL_CB_WRITE;
    }
    #endif
    ret = SendData(ssl, data, sz);

    WOLFSSL_LEAVE("SSL_write()", ret);

    if (ret < 0)
        return WOLFSSL_FATAL_ERROR;
    else
        return ret;
}

static int wolfSSL_read_internal(WOLFSSL* ssl, void* data, int sz, int peek)
{
    int ret;

    WOLFSSL_ENTER("wolfSSL_read_internal()");

    if (ssl == NULL || data == NULL || sz < 0)
        return BAD_FUNC_ARG;

#if defined(WOLFSSL_ERROR_CODE_OPENSSL) && defined(OPENSSL_EXTRA)
    /* This additional logic is meant to simulate following openSSL behavior:
     * After bidirectional SSL_shutdown complete, SSL_read returns 0 and
     * SSL_get_error_code returns SSL_ERROR_ZERO_RETURN.
     * This behavior is used to know the disconnect of the underlying
     * transport layer.
     *
     * In this logic, CBIORecv is called with a read size of 0 to check the
     * transport layer status. It also returns WOLFSSL_FAILURE so that
     * SSL_read does not return a positive number on failure.
     */

    /* make sure bidirectional TLS shutdown completes */
    if (ssl->error == WOLFSSL_ERROR_SYSCALL) {
        /* ask the underlying transport the connection is closed */
        if (ssl->CBIORecv(ssl, (char*)data, 0, ssl->IOCB_ReadCtx) ==
                                            WOLFSSL_CBIO_ERR_CONN_CLOSE) {
            ssl->options.isClosed = 1;
            ssl->error = WOLFSSL_ERROR_ZERO_RETURN;
        }
        return WOLFSSL_FAILURE;
    }
#endif

#ifdef HAVE_WRITE_DUP
    if (ssl->dupWrite && ssl->dupSide == WRITE_DUP_SIDE) {
        WOLFSSL_MSG("Write dup side cannot read");
        return WRITE_DUP_READ_E;
    }
#endif

#ifdef HAVE_ERRNO_H
        errno = 0;
#endif

#ifdef WOLFSSL_DTLS
    if (ssl->options.dtls) {
        ssl->dtls_expected_rx = max(sz + DTLS_MTU_ADDITIONAL_READ_BUFFER,
                MAX_MTU);
#ifdef WOLFSSL_SCTP
        if (ssl->options.dtlsSctp)
#endif
#if defined(WOLFSSL_SCTP) || defined(WOLFSSL_DTLS_MTU)
            /* Add some bytes so that we can operate with slight difference
             * in set MTU size on each peer */
            ssl->dtls_expected_rx = max(ssl->dtls_expected_rx,
                    ssl->dtlsMtuSz + DTLS_MTU_ADDITIONAL_READ_BUFFER);
#endif
    }
#endif

    sz = wolfSSL_GetMaxRecordSize(ssl, sz);

    ret = ReceiveData(ssl, (byte*)data, sz, peek);

#ifdef HAVE_WRITE_DUP
    if (ssl->dupWrite) {
        if (ssl->error != 0 && ssl->error != WANT_READ
        #ifdef WOLFSSL_ASYNC_CRYPT
            && ssl->error != WC_PENDING_E
        #endif
        ) {
            int notifyErr;

            WOLFSSL_MSG("Notifying write side of fatal read error");
            notifyErr  = NotifyWriteSide(ssl, ssl->error);
            if (notifyErr < 0) {
                ret = ssl->error = notifyErr;
            }
        }
    }
#endif

    WOLFSSL_LEAVE("wolfSSL_read_internal()", ret);

    if (ret < 0)
        return WOLFSSL_FATAL_ERROR;
    else
        return ret;
}


int wolfSSL_peek(WOLFSSL* ssl, void* data, int sz)
{
    WOLFSSL_ENTER("wolfSSL_peek()");

    return wolfSSL_read_internal(ssl, data, sz, TRUE);
}


WOLFSSL_ABI
int wolfSSL_read(WOLFSSL* ssl, void* data, int sz)
{
    WOLFSSL_ENTER("wolfSSL_read()");

    #ifdef OPENSSL_EXTRA
    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }
    if (ssl->CBIS != NULL) {
        ssl->CBIS(ssl, SSL_CB_READ, WOLFSSL_SUCCESS);
        ssl->cbmode = SSL_CB_READ;
    }
    #endif
    return wolfSSL_read_internal(ssl, data, sz, FALSE);
}


#ifdef WOLFSSL_MULTICAST

int wolfSSL_mcast_read(WOLFSSL* ssl, word16* id, void* data, int sz)
{
    int ret = 0;

    WOLFSSL_ENTER("wolfSSL_mcast_read()");

    if (ssl == NULL)
        return BAD_FUNC_ARG;

    ret = wolfSSL_read_internal(ssl, data, sz, FALSE);
    if (ssl->options.dtls && ssl->options.haveMcast && id != NULL)
        *id = ssl->keys.curPeerId;
    return ret;
}

#endif /* WOLFSSL_MULTICAST */


/* helpers to set the device id, WOLFSSL_SUCCESS on ok */
WOLFSSL_ABI
int wolfSSL_SetDevId(WOLFSSL* ssl, int devId)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    ssl->devId = devId;

    return WOLFSSL_SUCCESS;
}

WOLFSSL_ABI
int wolfSSL_CTX_SetDevId(WOLFSSL_CTX* ctx, int devId)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;

    ctx->devId = devId;

    return WOLFSSL_SUCCESS;
}

/* helpers to get device id and heap */
WOLFSSL_ABI
int wolfSSL_CTX_GetDevId(WOLFSSL_CTX* ctx, WOLFSSL* ssl)
{
    int devId = INVALID_DEVID;
    if (ctx != NULL)
        devId = ctx->devId;
    else if (ssl != NULL)
        devId = ssl->devId;
    return devId;
}
void* wolfSSL_CTX_GetHeap(WOLFSSL_CTX* ctx, WOLFSSL* ssl)
{
    void* heap = NULL;
    if (ctx != NULL)
        heap = ctx->heap;
    else if (ssl != NULL)
        heap = ssl->heap;
    return heap;
}


#ifdef HAVE_SNI

WOLFSSL_ABI
int wolfSSL_UseSNI(WOLFSSL* ssl, byte type, const void* data, word16 size)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    return TLSX_UseSNI(&ssl->extensions, type, data, size, ssl->heap);
}


WOLFSSL_ABI
int wolfSSL_CTX_UseSNI(WOLFSSL_CTX* ctx, byte type, const void* data,
                                                                    word16 size)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;

    return TLSX_UseSNI(&ctx->extensions, type, data, size, ctx->heap);
}

#ifndef NO_WOLFSSL_SERVER

void wolfSSL_SNI_SetOptions(WOLFSSL* ssl, byte type, byte options)
{
    if (ssl && ssl->extensions)
        TLSX_SNI_SetOptions(ssl->extensions, type, options);
}


void wolfSSL_CTX_SNI_SetOptions(WOLFSSL_CTX* ctx, byte type, byte options)
{
    if (ctx && ctx->extensions)
        TLSX_SNI_SetOptions(ctx->extensions, type, options);
}


byte wolfSSL_SNI_Status(WOLFSSL* ssl, byte type)
{
    return TLSX_SNI_Status(ssl ? ssl->extensions : NULL, type);
}


word16 wolfSSL_SNI_GetRequest(WOLFSSL* ssl, byte type, void** data)
{
    if (data)
        *data = NULL;

    if (ssl && ssl->extensions)
        return TLSX_SNI_GetRequest(ssl->extensions, type, data);

    return 0;
}


int wolfSSL_SNI_GetFromBuffer(const byte* clientHello, word32 helloSz,
                              byte type, byte* sni, word32* inOutSz)
{
    if (clientHello && helloSz > 0 && sni && inOutSz && *inOutSz > 0)
        return TLSX_SNI_GetFromBuffer(clientHello, helloSz, type, sni, inOutSz);

    return BAD_FUNC_ARG;
}

#endif /* NO_WOLFSSL_SERVER */

#endif /* HAVE_SNI */


#ifdef HAVE_TRUSTED_CA

WOLFSSL_API int wolfSSL_UseTrustedCA(WOLFSSL* ssl, byte type,
            const byte* certId, word32 certIdSz)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    if (type == WOLFSSL_TRUSTED_CA_PRE_AGREED) {
        if (certId != NULL || certIdSz != 0)
            return BAD_FUNC_ARG;
    }
    else if (type == WOLFSSL_TRUSTED_CA_X509_NAME) {
        if (certId == NULL || certIdSz == 0)
            return BAD_FUNC_ARG;
    }
    #ifndef NO_SHA
    else if (type == WOLFSSL_TRUSTED_CA_KEY_SHA1 ||
            type == WOLFSSL_TRUSTED_CA_CERT_SHA1) {
        if (certId == NULL || certIdSz != WC_SHA_DIGEST_SIZE)
            return BAD_FUNC_ARG;
    }
    #endif
    else
        return BAD_FUNC_ARG;

    return TLSX_UseTrustedCA(&ssl->extensions,
            type, certId, certIdSz, ssl->heap);
}

#endif /* HAVE_TRUSTED_CA */


#ifdef HAVE_MAX_FRAGMENT
#ifndef NO_WOLFSSL_CLIENT

int wolfSSL_UseMaxFragment(WOLFSSL* ssl, byte mfl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

#ifdef WOLFSSL_ALLOW_MAX_FRAGMENT_ADJUST
    /* The following is a non-standard way to reconfigure the max packet size
        post-handshake for wolfSSL_write/wolfSSL_read */
    if (ssl->options.handShakeState == HANDSHAKE_DONE) {
        switch (mfl) {
            case WOLFSSL_MFL_2_8 : ssl->max_fragment =  256; break;
            case WOLFSSL_MFL_2_9 : ssl->max_fragment =  512; break;
            case WOLFSSL_MFL_2_10: ssl->max_fragment = 1024; break;
            case WOLFSSL_MFL_2_11: ssl->max_fragment = 2048; break;
            case WOLFSSL_MFL_2_12: ssl->max_fragment = 4096; break;
            case WOLFSSL_MFL_2_13: ssl->max_fragment = 8192; break;
            default: ssl->max_fragment = MAX_RECORD_SIZE; break;
        }
        return WOLFSSL_SUCCESS;
    }
#endif /* WOLFSSL_MAX_FRAGMENT_ADJUST */

    /* This call sets the max fragment TLS extension, which gets sent to server.
        The server_hello response is what sets the `ssl->max_fragment` in
        TLSX_MFL_Parse */
    return TLSX_UseMaxFragment(&ssl->extensions, mfl, ssl->heap);
}


int wolfSSL_CTX_UseMaxFragment(WOLFSSL_CTX* ctx, byte mfl)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;

    return TLSX_UseMaxFragment(&ctx->extensions, mfl, ctx->heap);
}

#endif /* NO_WOLFSSL_CLIENT */
#endif /* HAVE_MAX_FRAGMENT */

#ifdef HAVE_TRUNCATED_HMAC
#ifndef NO_WOLFSSL_CLIENT

int wolfSSL_UseTruncatedHMAC(WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    return TLSX_UseTruncatedHMAC(&ssl->extensions, ssl->heap);
}


int wolfSSL_CTX_UseTruncatedHMAC(WOLFSSL_CTX* ctx)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;

    return TLSX_UseTruncatedHMAC(&ctx->extensions, ctx->heap);
}

#endif /* NO_WOLFSSL_CLIENT */
#endif /* HAVE_TRUNCATED_HMAC */

#ifdef HAVE_CERTIFICATE_STATUS_REQUEST

int wolfSSL_UseOCSPStapling(WOLFSSL* ssl, byte status_type, byte options)
{
    if (ssl == NULL || ssl->options.side != WOLFSSL_CLIENT_END)
        return BAD_FUNC_ARG;

    return TLSX_UseCertificateStatusRequest(&ssl->extensions, status_type,
                                          options, NULL, ssl->heap, ssl->devId);
}


int wolfSSL_CTX_UseOCSPStapling(WOLFSSL_CTX* ctx, byte status_type,
                                                                   byte options)
{
    if (ctx == NULL || ctx->method->side != WOLFSSL_CLIENT_END)
        return BAD_FUNC_ARG;

    return TLSX_UseCertificateStatusRequest(&ctx->extensions, status_type,
                                          options, NULL, ctx->heap, ctx->devId);
}

#endif /* HAVE_CERTIFICATE_STATUS_REQUEST */

#ifdef HAVE_CERTIFICATE_STATUS_REQUEST_V2

int wolfSSL_UseOCSPStaplingV2(WOLFSSL* ssl, byte status_type, byte options)
{
    if (ssl == NULL || ssl->options.side != WOLFSSL_CLIENT_END)
        return BAD_FUNC_ARG;

    return TLSX_UseCertificateStatusRequestV2(&ssl->extensions, status_type,
                                                options, ssl->heap, ssl->devId);
}


int wolfSSL_CTX_UseOCSPStaplingV2(WOLFSSL_CTX* ctx, byte status_type,
                                                                   byte options)
{
    if (ctx == NULL || ctx->method->side != WOLFSSL_CLIENT_END)
        return BAD_FUNC_ARG;

    return TLSX_UseCertificateStatusRequestV2(&ctx->extensions, status_type,
                                                options, ctx->heap, ctx->devId);
}

#endif /* HAVE_CERTIFICATE_STATUS_REQUEST_V2 */

/* Elliptic Curves */
#if defined(HAVE_SUPPORTED_CURVES)

static int isValidCurveGroup(word16 name)
{
    switch (name) {
        case WOLFSSL_ECC_SECP160K1:
        case WOLFSSL_ECC_SECP160R1:
        case WOLFSSL_ECC_SECP160R2:
        case WOLFSSL_ECC_SECP192K1:
        case WOLFSSL_ECC_SECP192R1:
        case WOLFSSL_ECC_SECP224K1:
        case WOLFSSL_ECC_SECP224R1:
        case WOLFSSL_ECC_SECP256K1:
        case WOLFSSL_ECC_SECP256R1:
        case WOLFSSL_ECC_SECP384R1:
        case WOLFSSL_ECC_SECP521R1:
        case WOLFSSL_ECC_BRAINPOOLP256R1:
        case WOLFSSL_ECC_BRAINPOOLP384R1:
        case WOLFSSL_ECC_BRAINPOOLP512R1:
        case WOLFSSL_ECC_X25519:
        case WOLFSSL_ECC_X448:

        case WOLFSSL_FFDHE_2048:
        case WOLFSSL_FFDHE_3072:
        case WOLFSSL_FFDHE_4096:
        case WOLFSSL_FFDHE_6144:
        case WOLFSSL_FFDHE_8192:
            return 1;

        default:
            return 0;
    }
}

int wolfSSL_UseSupportedCurve(WOLFSSL* ssl, word16 name)
{
    if (ssl == NULL || !isValidCurveGroup(name))
        return BAD_FUNC_ARG;

    ssl->options.userCurves = 1;

    return TLSX_UseSupportedCurve(&ssl->extensions, name, ssl->heap);
}


int wolfSSL_CTX_UseSupportedCurve(WOLFSSL_CTX* ctx, word16 name)
{
    if (ctx == NULL || !isValidCurveGroup(name))
        return BAD_FUNC_ARG;

    ctx->userCurves = 1;

    return TLSX_UseSupportedCurve(&ctx->extensions, name, ctx->heap);
}

#if defined(OPENSSL_EXTRA) && defined(WOLFSSL_TLS13)
int  wolfSSL_CTX_set1_groups(WOLFSSL_CTX* ctx, int* groups,
                                        int count)
{
    int i;
    int _groups[WOLFSSL_MAX_GROUP_COUNT];
    WOLFSSL_ENTER("wolfSSL_CTX_set1_groups");
    if (count == 0) {
        WOLFSSL_MSG("Group count is zero");
        return WOLFSSL_FAILURE;
    }
    for (i = 0; i < count; i++) {
        if (isValidCurveGroup((word16)groups[i])) {
            _groups[i] = groups[i];
        }
#ifdef HAVE_ECC
        else {
            /* groups may be populated with curve NIDs */
            int oid = nid2oid(groups[i], oidCurveType);
            int name = (int)GetCurveByOID(oid);
            if (name == 0) {
                WOLFSSL_MSG("Invalid group name");
                return WOLFSSL_FAILURE;
            }
            _groups[i] = name;
        }
#else
        else {
            WOLFSSL_MSG("Invalid group name");
            return WOLFSSL_FAILURE;
        }
#endif
    }
    return wolfSSL_CTX_set_groups(ctx, _groups, count) == WOLFSSL_SUCCESS ?
            WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
}

int  wolfSSL_set1_groups(WOLFSSL* ssl, int* groups, int count)
{
    int i;
    int _groups[WOLFSSL_MAX_GROUP_COUNT];
    WOLFSSL_ENTER("wolfSSL_CTX_set1_groups");
    if (count == 0) {
        WOLFSSL_MSG("Group count is zero");
        return WOLFSSL_FAILURE;
    }
    for (i = 0; i < count; i++) {
        if (isValidCurveGroup((word16)groups[i])) {
            _groups[i] = groups[i];
        }
#ifdef HAVE_ECC
        else {
            /* groups may be populated with curve NIDs */
            int oid = nid2oid(groups[i], oidCurveType);
            int name = (int)GetCurveByOID(oid);
            if (name == 0) {
                WOLFSSL_MSG("Invalid group name");
                return WOLFSSL_FAILURE;
            }
            _groups[i] = name;
        }
#else
        else {
            WOLFSSL_MSG("Invalid group name");
            return WOLFSSL_FAILURE;
        }
#endif
    }
    return wolfSSL_set_groups(ssl, _groups, count) == WOLFSSL_SUCCESS ?
            WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
}
#endif /* OPENSSL_EXTRA && WOLFSSL_TLS13 */
#endif /* HAVE_SUPPORTED_CURVES */

/* QSH quantum safe handshake */
#ifdef HAVE_QSH
/* returns 1 if QSH has been used 0 otherwise */
int wolfSSL_isQSH(WOLFSSL* ssl)
{
    /* if no ssl struct than QSH was not used */
    if (ssl == NULL)
        return 0;

    return ssl->isQSH;
}


int wolfSSL_UseSupportedQSH(WOLFSSL* ssl, word16 name)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    switch (name) {
    #ifdef HAVE_NTRU
        case WOLFSSL_NTRU_EESS439:
        case WOLFSSL_NTRU_EESS593:
        case WOLFSSL_NTRU_EESS743:
            break;
    #endif
        default:
            return BAD_FUNC_ARG;
    }

    ssl->user_set_QSHSchemes = 1;

    return TLSX_UseQSHScheme(&ssl->extensions, name, NULL, 0, ssl->heap);
}

#ifndef NO_WOLFSSL_CLIENT
    /* user control over sending client public key in hello
       when flag = 1 will send keys if flag is 0 or function is not called
       then will not send keys in the hello extension
       return 0 on success
     */
    int wolfSSL_UseClientQSHKeys(WOLFSSL* ssl, unsigned char flag)
    {
        if (ssl == NULL)
            return BAD_FUNC_ARG;

        ssl->sendQSHKeys = flag;

        return 0;
    }
#endif /* NO_WOLFSSL_CLIENT */
#endif /* HAVE_QSH */

/* Application-Layer Protocol Negotiation */
#ifdef HAVE_ALPN

WOLFSSL_ABI
int wolfSSL_UseALPN(WOLFSSL* ssl, char *protocol_name_list,
                    word32 protocol_name_listSz, byte options)
{
    char    *list, *ptr, *token[WOLFSSL_MAX_ALPN_NUMBER+1]={NULL};
    word16  len;
    int     idx = 0;
    int     ret = WOLFSSL_FAILURE;

    WOLFSSL_ENTER("wolfSSL_UseALPN");

    if (ssl == NULL || protocol_name_list == NULL)
        return BAD_FUNC_ARG;

    if (protocol_name_listSz > (WOLFSSL_MAX_ALPN_NUMBER *
                                WOLFSSL_MAX_ALPN_PROTO_NAME_LEN +
                                WOLFSSL_MAX_ALPN_NUMBER)) {
        WOLFSSL_MSG("Invalid arguments, protocol name list too long");
        return BAD_FUNC_ARG;
    }

    if (!(options & WOLFSSL_ALPN_CONTINUE_ON_MISMATCH) &&
        !(options & WOLFSSL_ALPN_FAILED_ON_MISMATCH)) {
            WOLFSSL_MSG("Invalid arguments, options not supported");
            return BAD_FUNC_ARG;
        }


    list = (char *)XMALLOC(protocol_name_listSz+1, ssl->heap,
                           DYNAMIC_TYPE_ALPN);
    if (list == NULL) {
        WOLFSSL_MSG("Memory failure");
        return MEMORY_ERROR;
    }

    XSTRNCPY(list, protocol_name_list, protocol_name_listSz);
    list[protocol_name_listSz] = '\0';

    /* read all protocol name from the list */
    token[idx] = XSTRTOK(list, ",", &ptr);
    while (idx < WOLFSSL_MAX_ALPN_NUMBER && token[idx] != NULL)
        token[++idx] = XSTRTOK(NULL, ",", &ptr);

    /* add protocol name list in the TLS extension in reverse order */
    while ((idx--) > 0) {
        len = (word16)XSTRLEN(token[idx]);

        ret = TLSX_UseALPN(&ssl->extensions, token[idx], len, options,
                                                                     ssl->heap);
        if (ret != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("TLSX_UseALPN failure");
            break;
        }
    }

    XFREE(list, ssl->heap, DYNAMIC_TYPE_ALPN);

    return ret;
}

int wolfSSL_ALPN_GetProtocol(WOLFSSL* ssl, char **protocol_name, word16 *size)
{
    return TLSX_ALPN_GetRequest(ssl ? ssl->extensions : NULL,
                               (void **)protocol_name, size);
}

int wolfSSL_ALPN_GetPeerProtocol(WOLFSSL* ssl, char **list, word16 *listSz)
{
    if (list == NULL || listSz == NULL)
        return BAD_FUNC_ARG;

    if (ssl->alpn_client_list == NULL)
        return BUFFER_ERROR;

    *listSz = (word16)XSTRLEN(ssl->alpn_client_list);
    if (*listSz == 0)
        return BUFFER_ERROR;

    *list = (char *)XMALLOC((*listSz)+1, ssl->heap, DYNAMIC_TYPE_TLSX);
    if (*list == NULL)
        return MEMORY_ERROR;

    XSTRNCPY(*list, ssl->alpn_client_list, (*listSz)+1);
    (*list)[*listSz] = 0;

    return WOLFSSL_SUCCESS;
}


/* used to free memory allocated by wolfSSL_ALPN_GetPeerProtocol */
int wolfSSL_ALPN_FreePeerProtocol(WOLFSSL* ssl, char **list)
{
    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    XFREE(*list, ssl->heap, DYNAMIC_TYPE_TLSX);
    *list = NULL;

    return WOLFSSL_SUCCESS;
}

#endif /* HAVE_ALPN */

/* Secure Renegotiation */
#ifdef HAVE_SECURE_RENEGOTIATION

/* user is forcing ability to use secure renegotiation, we discourage it */
int wolfSSL_UseSecureRenegotiation(WOLFSSL* ssl)
{
    int ret = BAD_FUNC_ARG;

    if (ssl)
        ret = TLSX_UseSecureRenegotiation(&ssl->extensions, ssl->heap);

    if (ret == WOLFSSL_SUCCESS) {
        TLSX* extension = TLSX_Find(ssl->extensions, TLSX_RENEGOTIATION_INFO);

        if (extension)
            ssl->secure_renegotiation = (SecureRenegotiation*)extension->data;
    }

    return ret;
}

int wolfSSL_CTX_UseSecureRenegotiation(WOLFSSL_CTX* ctx)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;

    ctx->useSecureReneg = 1;
    return WOLFSSL_SUCCESS;
}


/* do a secure renegotiation handshake, user forced, we discourage */
static int _Rehandshake(WOLFSSL* ssl)
{
    int ret;

    if (ssl == NULL)
        return BAD_FUNC_ARG;

    if (ssl->secure_renegotiation == NULL) {
        WOLFSSL_MSG("Secure Renegotiation not forced on by user");
        return SECURE_RENEGOTIATION_E;
    }

    if (ssl->secure_renegotiation->enabled == 0) {
        WOLFSSL_MSG("Secure Renegotiation not enabled at extension level");
        return SECURE_RENEGOTIATION_E;
    }

    /* If the client started the renegotiation, the server will already
     * have processed the client's hello. */
    if (ssl->options.side != WOLFSSL_SERVER_END ||
        ssl->options.acceptState != ACCEPT_FIRST_REPLY_DONE) {

        if (ssl->options.handShakeState != HANDSHAKE_DONE) {
            if (!ssl->options.handShakeDone) {
                WOLFSSL_MSG("Can't renegotiate until initial "
                            "handshake complete");
                return SECURE_RENEGOTIATION_E;
            }
            else {
                WOLFSSL_MSG("Renegotiation already started. "
                            "Moving it forward.");
                ret = wolfSSL_negotiate(ssl);
                if (ret == WOLFSSL_SUCCESS)
                    ssl->secure_rene_count++;
                return ret;
            }
        }

#ifndef NO_FORCE_SCR_SAME_SUITE
        /* force same suite */
        if (ssl->suites) {
            ssl->suites->suiteSz = SUITE_LEN;
            ssl->suites->suites[0] = ssl->options.cipherSuite0;
            ssl->suites->suites[1] = ssl->options.cipherSuite;
        }
#endif

        /* reset handshake states */
        ssl->options.sendVerify = 0;
        ssl->options.serverState = NULL_STATE;
        ssl->options.clientState = NULL_STATE;
        ssl->options.connectState  = CONNECT_BEGIN;
        ssl->options.acceptState   = ACCEPT_BEGIN_RENEG;
        ssl->options.handShakeState = NULL_STATE;
        ssl->options.processReply  = 0;  /* TODO, move states in internal.h */

        XMEMSET(&ssl->msgsReceived, 0, sizeof(ssl->msgsReceived));

        ssl->secure_renegotiation->cache_status = SCR_CACHE_NEEDED;

#if !defined(NO_WOLFSSL_SERVER) && defined(HAVE_SERVER_RENEGOTIATION_INFO)
        if (ssl->options.side == WOLFSSL_SERVER_END) {
            ret = SendHelloRequest(ssl);
            if (ret != 0) {
                ssl->error = ret;
                return WOLFSSL_FATAL_ERROR;
            }
        }
#endif /* NO_WOLFSSL_SERVER && HAVE_SERVER_RENEGOTIATION_INFO */

        ret = InitHandshakeHashes(ssl);
        if (ret != 0) {
            ssl->error = ret;
            return WOLFSSL_FATAL_ERROR;
        }
    }
    ret = wolfSSL_negotiate(ssl);
    if (ret == WOLFSSL_SUCCESS)
        ssl->secure_rene_count++;
    return ret;
}


/* do a secure renegotiation handshake, user forced, we discourage */
int wolfSSL_Rehandshake(WOLFSSL* ssl)
{
    int ret = WOLFSSL_SUCCESS;
    WOLFSSL_ENTER("wolfSSL_Rehandshake");

    if (ssl->options.side == WOLFSSL_SERVER_END) {
        /* Reset option to send certificate verify. */
        ssl->options.sendVerify = 0;
    }
    else {
        /* Reset resuming flag to do full secure handshake. */
        ssl->options.resuming = 0;
        #ifdef HAVE_SESSION_TICKET
            /* Clearing the ticket. */
            ret = wolfSSL_UseSessionTicket(ssl);
        #endif
    }

#ifdef HAVE_SESSION_TICKET
    if (ret == WOLFSSL_SUCCESS)
#endif
        ret = _Rehandshake(ssl);

    return ret;
}


#ifndef NO_WOLFSSL_CLIENT

/* do a secure resumption handshake, user forced, we discourage */
int wolfSSL_SecureResume(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_SecureResume");

    if (ssl == NULL)
        return BAD_FUNC_ARG;

    if (ssl->options.side == WOLFSSL_SERVER_END) {
        ssl->error = SIDE_ERROR;
        return SSL_FATAL_ERROR;
    }

    return _Rehandshake(ssl);
}

#endif /* NO_WOLFSSL_CLIENT */

long wolfSSL_SSL_get_secure_renegotiation_support(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_SSL_get_secure_renegotiation_support");

    if (!ssl || !ssl->secure_renegotiation)
        return WOLFSSL_FAILURE;
    return ssl->secure_renegotiation->enabled;
}

#endif /* HAVE_SECURE_RENEGOTIATION */

#if defined(HAVE_SESSION_TICKET)
/* Session Ticket */

#if !defined(NO_WOLFSSL_SERVER)
int wolfSSL_CTX_NoTicketTLSv12(WOLFSSL_CTX* ctx)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;

    ctx->noTicketTls12 = 1;

    return WOLFSSL_SUCCESS;
}

int wolfSSL_NoTicketTLSv12(WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    ssl->options.noTicketTls12 = 1;

    return WOLFSSL_SUCCESS;
}

/* WOLFSSL_SUCCESS on ok */
int wolfSSL_CTX_set_TicketEncCb(WOLFSSL_CTX* ctx, SessionTicketEncCb cb)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;

    ctx->ticketEncCb = cb;

    return WOLFSSL_SUCCESS;
}

/* set hint interval, WOLFSSL_SUCCESS on ok */
int wolfSSL_CTX_set_TicketHint(WOLFSSL_CTX* ctx, int hint)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;

    ctx->ticketHint = hint;

    return WOLFSSL_SUCCESS;
}

/* set user context, WOLFSSL_SUCCESS on ok */
int wolfSSL_CTX_set_TicketEncCtx(WOLFSSL_CTX* ctx, void* userCtx)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;

    ctx->ticketEncCtx = userCtx;

    return WOLFSSL_SUCCESS;
}

/* get user context - returns userCtx on success, NULL on failure */
void* wolfSSL_CTX_get_TicketEncCtx(WOLFSSL_CTX* ctx)
{
    if (ctx == NULL)
        return NULL;

    return ctx->ticketEncCtx;
}
#endif /* !NO_WOLFSSL_SERVER */

#if !defined(NO_WOLFSSL_CLIENT)
int wolfSSL_UseSessionTicket(WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    return TLSX_UseSessionTicket(&ssl->extensions, NULL, ssl->heap);
}

int wolfSSL_CTX_UseSessionTicket(WOLFSSL_CTX* ctx)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;

    return TLSX_UseSessionTicket(&ctx->extensions, NULL, ctx->heap);
}

WOLFSSL_API int wolfSSL_get_SessionTicket(WOLFSSL* ssl,
                                          byte* buf, word32* bufSz)
{
    if (ssl == NULL || buf == NULL || bufSz == NULL || *bufSz == 0)
        return BAD_FUNC_ARG;

    if (ssl->session.ticketLen <= *bufSz) {
        XMEMCPY(buf, ssl->session.ticket, ssl->session.ticketLen);
        *bufSz = ssl->session.ticketLen;
    }
    else
        *bufSz = 0;

    return WOLFSSL_SUCCESS;
}

WOLFSSL_API int wolfSSL_set_SessionTicket(WOLFSSL* ssl, const byte* buf,
                                          word32 bufSz)
{
    if (ssl == NULL || (buf == NULL && bufSz > 0))
        return BAD_FUNC_ARG;

    if (bufSz > 0) {
        /* Ticket will fit into static ticket */
        if(bufSz <= SESSION_TICKET_LEN) {
            if (ssl->session.isDynamic) {
                XFREE(ssl->session.ticket, ssl->heap, DYNAMIC_TYPE_SESSION_TICK);
                ssl->session.isDynamic = 0;
                ssl->session.ticket = ssl->session.staticTicket;
            }
        } else { /* Ticket requires dynamic ticket storage */
            if (ssl->session.ticketLen < bufSz) { /* is dyn buffer big enough */
                if(ssl->session.isDynamic)
                    XFREE(ssl->session.ticket, ssl->heap,
                            DYNAMIC_TYPE_SESSION_TICK);
                ssl->session.ticket = (byte*)XMALLOC(bufSz, ssl->heap,
                        DYNAMIC_TYPE_SESSION_TICK);
                if(!ssl->session.ticket) {
                    ssl->session.ticket = ssl->session.staticTicket;
                    ssl->session.isDynamic = 0;
                    return MEMORY_ERROR;
                }
                ssl->session.isDynamic = 1;
            }
        }
        XMEMCPY(ssl->session.ticket, buf, bufSz);
    }
    ssl->session.ticketLen = (word16)bufSz;

    return WOLFSSL_SUCCESS;
}


WOLFSSL_API int wolfSSL_set_SessionTicket_cb(WOLFSSL* ssl,
                                            CallbackSessionTicket cb, void* ctx)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    ssl->session_ticket_cb = cb;
    ssl->session_ticket_ctx = ctx;

    return WOLFSSL_SUCCESS;
}
#endif /* !NO_WOLFSSL_CLIENT */

#endif /* HAVE_SESSION_TICKET */


#ifdef HAVE_EXTENDED_MASTER
#ifndef NO_WOLFSSL_CLIENT

int wolfSSL_CTX_DisableExtendedMasterSecret(WOLFSSL_CTX* ctx)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;

    ctx->haveEMS = 0;

    return WOLFSSL_SUCCESS;
}


int wolfSSL_DisableExtendedMasterSecret(WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    ssl->options.haveEMS = 0;

    return WOLFSSL_SUCCESS;
}

#endif
#endif


#ifndef WOLFSSL_LEANPSK

int wolfSSL_send(WOLFSSL* ssl, const void* data, int sz, int flags)
{
    int ret;
    int oldFlags;

    WOLFSSL_ENTER("wolfSSL_send()");

    if (ssl == NULL || data == NULL || sz < 0)
        return BAD_FUNC_ARG;

    oldFlags = ssl->wflags;

    ssl->wflags = flags;
    ret = wolfSSL_write(ssl, data, sz);
    ssl->wflags = oldFlags;

    WOLFSSL_LEAVE("wolfSSL_send()", ret);

    return ret;
}


int wolfSSL_recv(WOLFSSL* ssl, void* data, int sz, int flags)
{
    int ret;
    int oldFlags;

    WOLFSSL_ENTER("wolfSSL_recv()");

    if (ssl == NULL || data == NULL || sz < 0)
        return BAD_FUNC_ARG;

    oldFlags = ssl->rflags;

    ssl->rflags = flags;
    ret = wolfSSL_read(ssl, data, sz);
    ssl->rflags = oldFlags;

    WOLFSSL_LEAVE("wolfSSL_recv()", ret);

    return ret;
}
#endif


/* WOLFSSL_SUCCESS on ok */
WOLFSSL_ABI
int wolfSSL_shutdown(WOLFSSL* ssl)
{
    int  ret = WOLFSSL_FATAL_ERROR;
    WOLFSSL_ENTER("SSL_shutdown()");

    if (ssl == NULL)
        return WOLFSSL_FATAL_ERROR;

    if (ssl->options.quietShutdown) {
        WOLFSSL_MSG("quiet shutdown, no close notify sent");
        ret = WOLFSSL_SUCCESS;
    }
    else {
        /* try to send close notify, not an error if can't */
        if (!ssl->options.isClosed && !ssl->options.connReset &&
                                      !ssl->options.sentNotify) {
            ssl->error = SendAlert(ssl, alert_warning, close_notify);
            if (ssl->error < 0) {
                WOLFSSL_ERROR(ssl->error);
                return WOLFSSL_FATAL_ERROR;
            }
            ssl->options.sentNotify = 1;  /* don't send close_notify twice */
            if (ssl->options.closeNotify)
                ret = WOLFSSL_SUCCESS;
            else {
                ret = WOLFSSL_SHUTDOWN_NOT_DONE;
                WOLFSSL_LEAVE("SSL_shutdown()", ret);
                return ret;
            }
        }

#ifdef WOLFSSL_SHUTDOWNONCE
        if (ssl->options.isClosed || ssl->options.connReset) {
            /* Shutdown has already occurred.
             * Caller is free to ignore this error. */
            return SSL_SHUTDOWN_ALREADY_DONE_E;
        }
#endif

        /* call wolfSSL_shutdown again for bidirectional shutdown */
        if (ssl->options.sentNotify && !ssl->options.closeNotify) {
            ret = ProcessReply(ssl);
            if (ret == ZERO_RETURN) {
                /* simulate OpenSSL behavior */
                ssl->error = WOLFSSL_ERROR_SYSCALL;
                ret = WOLFSSL_SUCCESS;
            } else if (ssl->error == WOLFSSL_ERROR_NONE) {
                ret = WOLFSSL_SHUTDOWN_NOT_DONE;
            } else {
                WOLFSSL_ERROR(ssl->error);
                ret = WOLFSSL_FATAL_ERROR;
            }
        }
    }

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
    /* reset WOLFSSL structure state for possible re-use */
    if (ret == WOLFSSL_SUCCESS) {
        if (wolfSSL_clear(ssl) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("could not clear WOLFSSL");
            ret = WOLFSSL_FATAL_ERROR;
        }
    }
#endif

    WOLFSSL_LEAVE("SSL_shutdown()", ret);

    return ret;
}


/* get current error state value */
int wolfSSL_state(WOLFSSL* ssl)
{
    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    return ssl->error;
}


WOLFSSL_ABI
int wolfSSL_get_error(WOLFSSL* ssl, int ret)
{
    WOLFSSL_ENTER("SSL_get_error");

    if (ret > 0)
        return WOLFSSL_ERROR_NONE;
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    WOLFSSL_LEAVE("SSL_get_error", ssl->error);

    /* make sure converted types are handled in SetErrorString() too */
    if (ssl->error == WANT_READ)
        return WOLFSSL_ERROR_WANT_READ;         /* convert to OpenSSL type */
    else if (ssl->error == WANT_WRITE)
        return WOLFSSL_ERROR_WANT_WRITE;        /* convert to OpenSSL type */
    else if (ssl->error == ZERO_RETURN)
        return WOLFSSL_ERROR_ZERO_RETURN;       /* convert to OpenSSL type */
    return ssl->error;
}


/* retrieve alert history, WOLFSSL_SUCCESS on ok */
int wolfSSL_get_alert_history(WOLFSSL* ssl, WOLFSSL_ALERT_HISTORY *h)
{
    if (ssl && h) {
        *h = ssl->alert_history;
    }
    return WOLFSSL_SUCCESS;
}

#ifdef OPENSSL_EXTRA
/* returns SSL_WRITING, SSL_READING or SSL_NOTHING */
int wolfSSL_want(WOLFSSL* ssl)
{
    int rw_state = SSL_NOTHING;
    if (ssl) {
        if (ssl->error == WANT_READ)
            rw_state = SSL_READING;
        else if (ssl->error == WANT_WRITE)
            rw_state = SSL_WRITING;
    }
    return rw_state;
}
#endif

/* return TRUE if current error is want read */
int wolfSSL_want_read(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("SSL_want_read");
    if (ssl->error == WANT_READ)
        return 1;

    return 0;
}


/* return TRUE if current error is want write */
int wolfSSL_want_write(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("SSL_want_write");
    if (ssl->error == WANT_WRITE)
        return 1;

    return 0;
}


char* wolfSSL_ERR_error_string(unsigned long errNumber, char* data)
{
    static char tmp[WOLFSSL_MAX_ERROR_SZ] = {0};

    WOLFSSL_ENTER("ERR_error_string");
    if (data) {
        SetErrorString((int)errNumber, data);
        return data;
    }
    else {
        SetErrorString((int)errNumber, tmp);
        return tmp;
    }
}


void wolfSSL_ERR_error_string_n(unsigned long e, char* buf, unsigned long len)
{
    WOLFSSL_ENTER("wolfSSL_ERR_error_string_n");
    if (len >= WOLFSSL_MAX_ERROR_SZ)
        wolfSSL_ERR_error_string(e, buf);
    else {
        char tmp[WOLFSSL_MAX_ERROR_SZ];

        WOLFSSL_MSG("Error buffer too short, truncating");
        if (len) {
            wolfSSL_ERR_error_string(e, tmp);
            XMEMCPY(buf, tmp, len-1);
            buf[len-1] = '\0';
        }
    }
}


/* don't free temporary arrays at end of handshake */
void wolfSSL_KeepArrays(WOLFSSL* ssl)
{
    if (ssl)
        ssl->options.saveArrays = 1;
}


/* user doesn't need temporary arrays anymore, Free */
void wolfSSL_FreeArrays(WOLFSSL* ssl)
{
    if (ssl && ssl->options.handShakeState == HANDSHAKE_DONE) {
        ssl->options.saveArrays = 0;
        FreeArrays(ssl, 1);
    }
}

/* Set option to indicate that the resources are not to be freed after
 * handshake.
 *
 * ssl  The SSL/TLS object.
 * returns BAD_FUNC_ARG when ssl is NULL and 0 on success.
 */
int wolfSSL_KeepHandshakeResources(WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    ssl->options.keepResources = 1;

    return 0;
}

/* Free the handshake resources after handshake.
 *
 * ssl  The SSL/TLS object.
 * returns BAD_FUNC_ARG when ssl is NULL and 0 on success.
 */
int wolfSSL_FreeHandshakeResources(WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    FreeHandshakeResources(ssl);

    return 0;
}

/* Use the client's order of preference when matching cipher suites.
 *
 * ssl  The SSL/TLS context object.
 * returns BAD_FUNC_ARG when ssl is NULL and 0 on success.
 */
int wolfSSL_CTX_UseClientSuites(WOLFSSL_CTX* ctx)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;

    ctx->useClientOrder = 1;

    return 0;
}

/* Use the client's order of preference when matching cipher suites.
 *
 * ssl  The SSL/TLS object.
 * returns BAD_FUNC_ARG when ssl is NULL and 0 on success.
 */
int wolfSSL_UseClientSuites(WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    ssl->options.useClientOrder = 1;

    return 0;
}

#ifdef WOLFSSL_DTLS
const byte* wolfSSL_GetDtlsMacSecret(WOLFSSL* ssl, int verify, int epochOrder)
{
#ifndef WOLFSSL_AEAD_ONLY
    Keys* keys = NULL;

    (void)epochOrder;

    if (ssl == NULL)
        return NULL;

#ifdef HAVE_SECURE_RENEGOTIATION
    switch (epochOrder) {
    case PEER_ORDER:
        if (IsDtlsMsgSCRKeys(ssl))
            keys = &ssl->secure_renegotiation->tmp_keys;
        else
            keys = &ssl->keys;
        break;
    case PREV_ORDER:
        keys = &ssl->keys;
        break;
    case CUR_ORDER:
        if (DtlsUseSCRKeys(ssl))
            keys = &ssl->secure_renegotiation->tmp_keys;
        else
            keys = &ssl->keys;
        break;
    default:
        WOLFSSL_MSG("Unknown epoch order");
        return NULL;
    }
#else
    keys = &ssl->keys;
#endif

    if ( (ssl->options.side == WOLFSSL_CLIENT_END && !verify) ||
         (ssl->options.side == WOLFSSL_SERVER_END &&  verify) )
        return keys->client_write_MAC_secret;
    else
        return keys->server_write_MAC_secret;
#else
    (void)ssl;
    (void)verify;
    (void)epochOrder;

    return NULL;
#endif
}
#endif /* WOLFSSL_DTLS */

const byte* wolfSSL_GetMacSecret(WOLFSSL* ssl, int verify)
{
#ifndef WOLFSSL_AEAD_ONLY
    if (ssl == NULL)
        return NULL;

    if ( (ssl->options.side == WOLFSSL_CLIENT_END && !verify) ||
         (ssl->options.side == WOLFSSL_SERVER_END &&  verify) )
        return ssl->keys.client_write_MAC_secret;
    else
        return ssl->keys.server_write_MAC_secret;
#else
    (void)ssl;
    (void)verify;

    return NULL;
#endif
}


#ifdef ATOMIC_USER

void  wolfSSL_CTX_SetMacEncryptCb(WOLFSSL_CTX* ctx, CallbackMacEncrypt cb)
{
    if (ctx)
        ctx->MacEncryptCb = cb;
}


void  wolfSSL_SetMacEncryptCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->MacEncryptCtx = ctx;
}


void* wolfSSL_GetMacEncryptCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->MacEncryptCtx;

    return NULL;
}


void  wolfSSL_CTX_SetDecryptVerifyCb(WOLFSSL_CTX* ctx, CallbackDecryptVerify cb)
{
    if (ctx)
        ctx->DecryptVerifyCb = cb;
}


void  wolfSSL_SetDecryptVerifyCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->DecryptVerifyCtx = ctx;
}


void* wolfSSL_GetDecryptVerifyCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->DecryptVerifyCtx;

    return NULL;
}

#if defined(HAVE_ENCRYPT_THEN_MAC) && !defined(WOLFSSL_AEAD_ONLY)
/**
 * Set the callback, against the context, that encrypts then MACs.
 *
 * ctx  SSL/TLS context.
 * cb   Callback function to use with Encrypt-Then-MAC.
 */
void  wolfSSL_CTX_SetEncryptMacCb(WOLFSSL_CTX* ctx, CallbackEncryptMac cb)
{
    if (ctx)
        ctx->EncryptMacCb = cb;
}

/**
 * Set the context to use with callback that encrypts then MACs.
 *
 * ssl  SSL/TLS object.
 * ctx  Callback function's context.
 */
void  wolfSSL_SetEncryptMacCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->EncryptMacCtx = ctx;
}

/**
 * Get the context being used with callback that encrypts then MACs.
 *
 * ssl  SSL/TLS object.
 * returns callback function's context or NULL if SSL/TLS object is NULL.
 */
void* wolfSSL_GetEncryptMacCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->EncryptMacCtx;

    return NULL;
}


/**
 * Set the callback, against the context, that MAC verifies then decrypts.
 *
 * ctx  SSL/TLS context.
 * cb   Callback function to use with Encrypt-Then-MAC.
 */
void  wolfSSL_CTX_SetVerifyDecryptCb(WOLFSSL_CTX* ctx, CallbackVerifyDecrypt cb)
{
    if (ctx)
        ctx->VerifyDecryptCb = cb;
}

/**
 * Set the context to use with callback that MAC verifies then decrypts.
 *
 * ssl  SSL/TLS object.
 * ctx  Callback function's context.
 */
void  wolfSSL_SetVerifyDecryptCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->VerifyDecryptCtx = ctx;
}

/**
 * Get the context being used with callback that MAC verifies then decrypts.
 *
 * ssl  SSL/TLS object.
 * returns callback function's context or NULL if SSL/TLS object is NULL.
 */
void* wolfSSL_GetVerifyDecryptCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->VerifyDecryptCtx;

    return NULL;
}
#endif /* HAVE_ENCRYPT_THEN_MAC !WOLFSSL_AEAD_ONLY */



const byte* wolfSSL_GetClientWriteKey(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->keys.client_write_key;

    return NULL;
}


const byte* wolfSSL_GetClientWriteIV(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->keys.client_write_IV;

    return NULL;
}


const byte* wolfSSL_GetServerWriteKey(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->keys.server_write_key;

    return NULL;
}


const byte* wolfSSL_GetServerWriteIV(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->keys.server_write_IV;

    return NULL;
}

int wolfSSL_GetKeySize(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->specs.key_size;

    return BAD_FUNC_ARG;
}


int wolfSSL_GetIVSize(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->specs.iv_size;

    return BAD_FUNC_ARG;
}


int wolfSSL_GetBulkCipher(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->specs.bulk_cipher_algorithm;

    return BAD_FUNC_ARG;
}


int wolfSSL_GetCipherType(WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

#ifndef WOLFSSL_AEAD_ONLY
    if (ssl->specs.cipher_type == block)
        return WOLFSSL_BLOCK_TYPE;
    if (ssl->specs.cipher_type == stream)
        return WOLFSSL_STREAM_TYPE;
#endif
    if (ssl->specs.cipher_type == aead)
        return WOLFSSL_AEAD_TYPE;

    return -1;
}


int wolfSSL_GetCipherBlockSize(WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    return ssl->specs.block_size;
}


int wolfSSL_GetAeadMacSize(WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    return ssl->specs.aead_mac_size;
}


int wolfSSL_IsTLSv1_1(WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    if (ssl->options.tls1_1)
        return 1;

    return 0;
}


int wolfSSL_GetSide(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->options.side;

    return BAD_FUNC_ARG;
}


int wolfSSL_GetHmacSize(WOLFSSL* ssl)
{
    /* AEAD ciphers don't have HMAC keys */
    if (ssl)
        return (ssl->specs.cipher_type != aead) ? ssl->specs.hash_size : 0;

    return BAD_FUNC_ARG;
}

#endif /* ATOMIC_USER */

#ifndef NO_CERTS

WOLFSSL_CERT_MANAGER* wolfSSL_CTX_GetCertManager(WOLFSSL_CTX* ctx)
{
    WOLFSSL_CERT_MANAGER* cm = NULL;
    if (ctx)
        cm = ctx->cm;
    return cm;
}

WOLFSSL_CERT_MANAGER* wolfSSL_CertManagerNew_ex(void* heap)
{
    WOLFSSL_CERT_MANAGER* cm;

    WOLFSSL_ENTER("wolfSSL_CertManagerNew");

    cm = (WOLFSSL_CERT_MANAGER*) XMALLOC(sizeof(WOLFSSL_CERT_MANAGER), heap,
                                         DYNAMIC_TYPE_CERT_MANAGER);
    if (cm) {
        XMEMSET(cm, 0, sizeof(WOLFSSL_CERT_MANAGER));
        cm->refCount = 1;

        if (wc_InitMutex(&cm->caLock) != 0) {
            WOLFSSL_MSG("Bad mutex init");
            wolfSSL_CertManagerFree(cm);
            return NULL;
        }
        if (wc_InitMutex(&cm->refMutex) != 0) {
            WOLFSSL_MSG("Bad mutex init");
            wolfSSL_CertManagerFree(cm);
            return NULL;
        }

        #ifdef WOLFSSL_TRUST_PEER_CERT
        if (wc_InitMutex(&cm->tpLock) != 0) {
            WOLFSSL_MSG("Bad mutex init");
            wolfSSL_CertManagerFree(cm);
            return NULL;
        }
        #endif

        /* set default minimum key size allowed */
        #ifndef NO_RSA
            cm->minRsaKeySz = MIN_RSAKEY_SZ;
        #endif
        #ifdef HAVE_ECC
            cm->minEccKeySz = MIN_ECCKEY_SZ;
        #endif
            cm->heap = heap;
    }

    return cm;
}


WOLFSSL_CERT_MANAGER* wolfSSL_CertManagerNew(void)
{
    return wolfSSL_CertManagerNew_ex(NULL);
}


void wolfSSL_CertManagerFree(WOLFSSL_CERT_MANAGER* cm)
{
    int doFree = 0;
    WOLFSSL_ENTER("wolfSSL_CertManagerFree");

    if (cm) {
        if (wc_LockMutex(&cm->refMutex) != 0) {
            WOLFSSL_MSG("Couldn't lock cm mutex");
        }
        cm->refCount--;
        if (cm->refCount == 0)
            doFree = 1;
        wc_UnLockMutex(&cm->refMutex);
        if (doFree) {
            #ifdef HAVE_CRL
                if (cm->crl)
                    FreeCRL(cm->crl, 1);
            #endif
            #ifdef HAVE_OCSP
                if (cm->ocsp)
                    FreeOCSP(cm->ocsp, 1);
                XFREE(cm->ocspOverrideURL, cm->heap, DYNAMIC_TYPE_URL);
            #if !defined(NO_WOLFSSL_SERVER) && \
                (defined(HAVE_CERTIFICATE_STATUS_REQUEST) || \
                 defined(HAVE_CERTIFICATE_STATUS_REQUEST_V2))
                if (cm->ocsp_stapling)
                    FreeOCSP(cm->ocsp_stapling, 1);
            #endif
            #endif
            FreeSignerTable(cm->caTable, CA_TABLE_SIZE, cm->heap);
            wc_FreeMutex(&cm->caLock);

            #ifdef WOLFSSL_TRUST_PEER_CERT
            FreeTrustedPeerTable(cm->tpTable, TP_TABLE_SIZE, cm->heap);
            wc_FreeMutex(&cm->tpLock);
            #endif
            if (wc_FreeMutex(&cm->refMutex) != 0) {
                WOLFSSL_MSG("Couldn't free refMutex mutex");
            }
            XFREE(cm, cm->heap, DYNAMIC_TYPE_CERT_MANAGER);
        }
    }

}

int wolfSSL_CertManager_up_ref(WOLFSSL_CERT_MANAGER* cm)
{
    if (cm) {
        if (wc_LockMutex(&cm->refMutex) != 0) {
            WOLFSSL_MSG("Failed to lock cm mutex");
        }
        cm->refCount++;
        wc_UnLockMutex(&cm->refMutex);

        return WOLFSSL_SUCCESS;
    }

    return WOLFSSL_FAILURE;
}

#if defined(OPENSSL_EXTRA) && !defined(NO_FILESYSTEM)
#if defined(WOLFSSL_SIGNER_DER_CERT)
/******************************************************************************
* wolfSSL_CertManagerGetCerts - retrieve stack of X509 certificates in a
* certificate manager (CM).
*
* RETURNS:
* returns stack of X509 certs on success, otherwise returns a NULL.
*/
WOLFSSL_STACK* wolfSSL_CertManagerGetCerts(WOLFSSL_CERT_MANAGER* cm)
{
    WOLFSSL_STACK* sk = NULL;
    int numCerts = 0;
    DerBuffer** certBuffers = NULL;
    const byte* derBuffer = NULL;
    Signer* signers = NULL;
    word32  row = 0;
    WOLFSSL_X509* x509 = NULL;
    int i = 0;
    int ret = 0;

    if (cm == NULL)
        return NULL;

    sk = wolfSSL_sk_X509_new();
    if (sk == NULL)
        goto error;

    if (wc_LockMutex(&cm->caLock) != 0)
        goto error;

    /* Iterate once to get the number of certs, for memory allocation
       purposes. */
    for (row = 0; row < CA_TABLE_SIZE; row++) {
        signers = cm->caTable[row];
        while (signers && signers->derCert && signers->derCert->buffer) {
            ++numCerts;
            signers = signers->next;
        }
    }

    if (numCerts == 0) {
        wc_UnLockMutex(&cm->caLock);
        goto error;
    }

    certBuffers = (DerBuffer**)XMALLOC(sizeof(DerBuffer*) * numCerts, cm->heap,
                                       DYNAMIC_TYPE_TMP_BUFFER);
    if (certBuffers == NULL) {
        wc_UnLockMutex(&cm->caLock);
        goto error;
    }
    XMEMSET(certBuffers, 0, sizeof(DerBuffer*) * numCerts);

    /* Copy the certs locally so that we can release the caLock. If the lock is
       held when wolfSSL_d2i_X509 is called, GetCA will also try to get the
       lock, leading to deadlock. */
    for (row = 0; row < CA_TABLE_SIZE; row++) {
        signers = cm->caTable[row];
        while (signers && signers->derCert && signers->derCert->buffer) {
            ret = AllocDer(&certBuffers[i], signers->derCert->length, CA_TYPE,
                           cm->heap);
            if (ret < 0) {
                wc_UnLockMutex(&cm->caLock);
                goto error;
            }

            XMEMCPY(certBuffers[i]->buffer, signers->derCert->buffer,
                    signers->derCert->length);
            certBuffers[i]->length = signers->derCert->length;

            ++i;
            signers = signers->next;
        }
    }

    wc_UnLockMutex(&cm->caLock);

    for (i = 0; i < numCerts; ++i) {
        derBuffer = certBuffers[i]->buffer;
        wolfSSL_d2i_X509(&x509, &derBuffer, certBuffers[i]->length);
        if (x509 == NULL)
            goto error;

        if (wolfSSL_sk_X509_push(sk, x509) != WOLFSSL_SUCCESS)
            goto error;
    }

    for (i = 0; i < numCerts && certBuffers[i] != NULL; ++i) {
        FreeDer(&certBuffers[i]);
    }

    XFREE(certBuffers, cm->heap, DYNAMIC_TYPE_TMP_BUFFER);

    return sk;

error:
    if (sk)
        wolfSSL_sk_X509_free(sk);

    if (certBuffers != NULL) {
        for (i = 0; i < numCerts && certBuffers[i] != NULL; ++i) {
            FreeDer(&certBuffers[i]);
        }
    }

    if (certBuffers)
        XFREE(certBuffers, cm->heap, DYNAMIC_TYPE_TMP_BUFFER);

    return NULL;
}

#endif /* WOLFSSL_SIGNER_DER_CERT */
#endif /* OPENSSL_EXTRA && !NO_FILESYSTEM */

/* Unload the CA signer list */
int wolfSSL_CertManagerUnloadCAs(WOLFSSL_CERT_MANAGER* cm)
{
    WOLFSSL_ENTER("wolfSSL_CertManagerUnloadCAs");

    if (cm == NULL)
        return BAD_FUNC_ARG;

    if (wc_LockMutex(&cm->caLock) != 0)
        return BAD_MUTEX_E;

    FreeSignerTable(cm->caTable, CA_TABLE_SIZE, cm->heap);

    wc_UnLockMutex(&cm->caLock);


    return WOLFSSL_SUCCESS;
}


#ifdef WOLFSSL_TRUST_PEER_CERT
int wolfSSL_CertManagerUnload_trust_peers(WOLFSSL_CERT_MANAGER* cm)
{
    WOLFSSL_ENTER("wolfSSL_CertManagerUnload_trust_peers");

    if (cm == NULL)
        return BAD_FUNC_ARG;

    if (wc_LockMutex(&cm->tpLock) != 0)
        return BAD_MUTEX_E;

    FreeTrustedPeerTable(cm->tpTable, TP_TABLE_SIZE, cm->heap);

    wc_UnLockMutex(&cm->tpLock);


    return WOLFSSL_SUCCESS;
}
#endif /* WOLFSSL_TRUST_PEER_CERT */

#endif /* NO_CERTS */

#if !defined(NO_FILESYSTEM) && !defined(NO_STDIO_FILESYSTEM)

void wolfSSL_ERR_print_errors_fp(XFILE fp, int err)
{
    char data[WOLFSSL_MAX_ERROR_SZ + 1];

    WOLFSSL_ENTER("wolfSSL_ERR_print_errors_fp");
    SetErrorString(err, data);
    XFPRINTF(fp, "%s", data);
}

#if defined(OPENSSL_EXTRA) || defined(DEBUG_WOLFSSL_VERBOSE)
void wolfSSL_ERR_dump_errors_fp(XFILE fp)
{
    wc_ERR_print_errors_fp(fp);
}

void wolfSSL_ERR_print_errors_cb (int (*cb)(const char *str, size_t len,
                                            void *u), void *u)
{
    wc_ERR_print_errors_cb(cb, u);
}
#endif
#endif

WOLFSSL_ABI
int wolfSSL_pending(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("SSL_pending");
    return ssl->buffers.clearOutputBuffer.length;
}


#ifndef WOLFSSL_LEANPSK
/* turn on handshake group messages for context */
int wolfSSL_CTX_set_group_messages(WOLFSSL_CTX* ctx)
{
    if (ctx == NULL)
       return BAD_FUNC_ARG;

    ctx->groupMessages = 1;

    return WOLFSSL_SUCCESS;
}
#endif


#ifndef NO_WOLFSSL_CLIENT
/* connect enough to get peer cert chain */
int wolfSSL_connect_cert(WOLFSSL* ssl)
{
    int  ret;

    if (ssl == NULL)
        return WOLFSSL_FAILURE;

    ssl->options.certOnly = 1;
    ret = wolfSSL_connect(ssl);
    ssl->options.certOnly   = 0;

    return ret;
}
#endif


#ifndef WOLFSSL_LEANPSK
/* turn on handshake group messages for ssl object */
int wolfSSL_set_group_messages(WOLFSSL* ssl)
{
    if (ssl == NULL)
       return BAD_FUNC_ARG;

    ssl->options.groupMessages = 1;

    return WOLFSSL_SUCCESS;
}


/* make minVersion the internal equivalent SSL version */
static int SetMinVersionHelper(byte* minVersion, int version)
{
#ifdef NO_TLS
    (void)minVersion;
#endif

    switch (version) {
#if defined(WOLFSSL_ALLOW_SSLV3) && !defined(NO_OLD_TLS)
        case WOLFSSL_SSLV3:
            *minVersion = SSLv3_MINOR;
            break;
#endif

#ifndef NO_TLS
    #ifndef NO_OLD_TLS
        #ifdef WOLFSSL_ALLOW_TLSV10
        case WOLFSSL_TLSV1:
            *minVersion = TLSv1_MINOR;
            break;
        #endif

        case WOLFSSL_TLSV1_1:
            *minVersion = TLSv1_1_MINOR;
            break;
    #endif
    #ifndef WOLFSSL_NO_TLS12
        case WOLFSSL_TLSV1_2:
            *minVersion = TLSv1_2_MINOR;
            break;
    #endif
#endif
    #ifdef WOLFSSL_TLS13
        case WOLFSSL_TLSV1_3:
            *minVersion = TLSv1_3_MINOR;
            break;
    #endif

        default:
            WOLFSSL_MSG("Bad function argument");
            return BAD_FUNC_ARG;
    }

    return WOLFSSL_SUCCESS;
}


/* Set minimum downgrade version allowed, WOLFSSL_SUCCESS on ok */
WOLFSSL_ABI
int wolfSSL_CTX_SetMinVersion(WOLFSSL_CTX* ctx, int version)
{
    WOLFSSL_ENTER("wolfSSL_CTX_SetMinVersion");

    if (ctx == NULL) {
        WOLFSSL_MSG("Bad function argument");
        return BAD_FUNC_ARG;
    }

    return SetMinVersionHelper(&ctx->minDowngrade, version);
}


/* Set minimum downgrade version allowed, WOLFSSL_SUCCESS on ok */
int wolfSSL_SetMinVersion(WOLFSSL* ssl, int version)
{
    WOLFSSL_ENTER("wolfSSL_SetMinVersion");

    if (ssl == NULL) {
        WOLFSSL_MSG("Bad function argument");
        return BAD_FUNC_ARG;
    }

    return SetMinVersionHelper(&ssl->options.minDowngrade, version);
}


/* Function to get version as WOLFSSL_ enum value for wolfSSL_SetVersion */
int wolfSSL_GetVersion(const WOLFSSL* ssl)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    if (ssl->version.major == SSLv3_MAJOR) {
        switch (ssl->version.minor) {
            case SSLv3_MINOR :
                return WOLFSSL_SSLV3;
            case TLSv1_MINOR :
                return WOLFSSL_TLSV1;
            case TLSv1_1_MINOR :
                return WOLFSSL_TLSV1_1;
            case TLSv1_2_MINOR :
                return WOLFSSL_TLSV1_2;
            case TLSv1_3_MINOR :
                return WOLFSSL_TLSV1_3;
            default:
                break;
        }
    }

    return VERSION_ERROR;
}

int wolfSSL_SetVersion(WOLFSSL* ssl, int version)
{
    word16 haveRSA = 1;
    word16 havePSK = 0;
    int    keySz   = 0;

    WOLFSSL_ENTER("wolfSSL_SetVersion");

    if (ssl == NULL) {
        WOLFSSL_MSG("Bad function argument");
        return BAD_FUNC_ARG;
    }

    switch (version) {
#if defined(WOLFSSL_ALLOW_SSLV3) && !defined(NO_OLD_TLS)
        case WOLFSSL_SSLV3:
            ssl->version = MakeSSLv3();
            break;
#endif

#ifndef NO_TLS
    #ifndef NO_OLD_TLS
        #ifdef WOLFSSL_ALLOW_TLSV10
        case WOLFSSL_TLSV1:
            ssl->version = MakeTLSv1();
            break;
        #endif

        case WOLFSSL_TLSV1_1:
            ssl->version = MakeTLSv1_1();
            break;
    #endif
    #ifndef WOLFSSL_NO_TLS12
        case WOLFSSL_TLSV1_2:
            ssl->version = MakeTLSv1_2();
            break;
    #endif
#endif
#ifdef WOLFSSL_TLS13
        case WOLFSSL_TLSV1_3:
            ssl->version = MakeTLSv1_3();
            break;

#endif

        default:
            WOLFSSL_MSG("Bad function argument");
            return BAD_FUNC_ARG;
    }

    #ifdef NO_RSA
        haveRSA = 0;
    #endif
    #ifndef NO_PSK
        havePSK = ssl->options.havePSK;
    #endif
    #ifndef NO_CERTS
        keySz = ssl->buffers.keySz;
    #endif

    InitSuites(ssl->suites, ssl->version, keySz, haveRSA, havePSK,
               ssl->options.haveDH, ssl->options.haveNTRU,
               ssl->options.haveECDSAsig, ssl->options.haveECC,
               ssl->options.haveStaticECC, ssl->options.haveAnon,
               ssl->options.side);

    return WOLFSSL_SUCCESS;
}
#endif /* !leanpsk */


#if !defined(NO_CERTS) || !defined(NO_SESSION_CACHE)

/* Make a work from the front of random hash */
static WC_INLINE word32 MakeWordFromHash(const byte* hashID)
{
    return ((word32)hashID[0] << 24) | ((word32)hashID[1] << 16) |
           ((word32)hashID[2] <<  8) |  (word32)hashID[3];
}

#endif /* !NO_CERTS || !NO_SESSION_CACHE */


#ifndef NO_CERTS

/* hash is the SHA digest of name, just use first 32 bits as hash */
static WC_INLINE word32 HashSigner(const byte* hash)
{
    return MakeWordFromHash(hash) % CA_TABLE_SIZE;
}


/* does CA already exist on signer list */
int AlreadySigner(WOLFSSL_CERT_MANAGER* cm, byte* hash)
{
    Signer* signers;
    int     ret = 0;
    word32  row;

    if (cm == NULL || hash == NULL) {
        return ret;
    }

    row = HashSigner(hash);

    if (wc_LockMutex(&cm->caLock) != 0) {
        return ret;
    }
    signers = cm->caTable[row];
    while (signers) {
        byte* subjectHash;

    #ifndef NO_SKID
        subjectHash = signers->subjectKeyIdHash;
    #else
        subjectHash = signers->subjectNameHash;
    #endif

        if (XMEMCMP(hash, subjectHash, SIGNER_DIGEST_SIZE) == 0) {
            ret = 1; /* success */
            break;
        }
        signers = signers->next;
    }
    wc_UnLockMutex(&cm->caLock);

    return ret;
}


#ifdef WOLFSSL_TRUST_PEER_CERT
/* hash is the SHA digest of name, just use first 32 bits as hash */
static WC_INLINE word32 TrustedPeerHashSigner(const byte* hash)
{
    return MakeWordFromHash(hash) % TP_TABLE_SIZE;
}

/* does trusted peer already exist on signer list */
int AlreadyTrustedPeer(WOLFSSL_CERT_MANAGER* cm, byte* hash)
{
    TrustedPeerCert* tp;
    int     ret = 0;
    word32  row = TrustedPeerHashSigner(hash);

    if (wc_LockMutex(&cm->tpLock) != 0)
        return  ret;
    tp = cm->tpTable[row];
    while (tp) {
        byte* subjectHash;
        #ifndef NO_SKID
            subjectHash = tp->subjectKeyIdHash;
        #else
            subjectHash = tp->subjectNameHash;
        #endif
        if (XMEMCMP(hash, subjectHash, SIGNER_DIGEST_SIZE) == 0) {
            ret = 1;
            break;
        }
        tp = tp->next;
    }
    wc_UnLockMutex(&cm->tpLock);

    return ret;
}


/* return Trusted Peer if found, otherwise NULL
    type is what to match on
 */
TrustedPeerCert* GetTrustedPeer(void* vp, byte* hash, int type)
{
    WOLFSSL_CERT_MANAGER* cm = (WOLFSSL_CERT_MANAGER*)vp;
    TrustedPeerCert* ret = NULL;
    TrustedPeerCert* tp  = NULL;
    word32  row;

    if (cm == NULL || hash == NULL)
        return NULL;

    row = TrustedPeerHashSigner(hash);

    if (wc_LockMutex(&cm->tpLock) != 0)
        return ret;

    tp = cm->tpTable[row];
    while (tp) {
        byte* subjectHash;
        switch (type) {
            #ifndef NO_SKID
            case WC_MATCH_SKID:
                subjectHash = tp->subjectKeyIdHash;
                break;
            #endif
            case WC_MATCH_NAME:
                subjectHash = tp->subjectNameHash;
                break;
            default:
                WOLFSSL_MSG("Unknown search type");
                wc_UnLockMutex(&cm->tpLock);
                return NULL;
        }
        if (XMEMCMP(hash, subjectHash, SIGNER_DIGEST_SIZE) == 0) {
            ret = tp;
            break;
        }
        tp = tp->next;
    }
    wc_UnLockMutex(&cm->tpLock);

    return ret;
}


int MatchTrustedPeer(TrustedPeerCert* tp, DecodedCert* cert)
{
    if (tp == NULL || cert == NULL)
        return BAD_FUNC_ARG;

    /* subject key id or subject hash has been compared when searching
       tpTable for the cert from function GetTrustedPeer */

    /* compare signatures */
    if (tp->sigLen == cert->sigLength) {
        if (XMEMCMP(tp->sig, cert->signature, cert->sigLength)) {
            return WOLFSSL_FAILURE;
        }
    }
    else {
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}
#endif /* WOLFSSL_TRUST_PEER_CERT */


/* return CA if found, otherwise NULL */
Signer* GetCA(void* vp, byte* hash)
{
    WOLFSSL_CERT_MANAGER* cm = (WOLFSSL_CERT_MANAGER*)vp;
    Signer* ret = NULL;
    Signer* signers;
    word32  row = 0;

    if (cm == NULL || hash == NULL)
        return NULL;

    row = HashSigner(hash);

    if (wc_LockMutex(&cm->caLock) != 0)
        return ret;

    signers = cm->caTable[row];
    while (signers) {
        byte* subjectHash;
        #ifndef NO_SKID
            subjectHash = signers->subjectKeyIdHash;
        #else
            subjectHash = signers->subjectNameHash;
        #endif
        if (XMEMCMP(hash, subjectHash, SIGNER_DIGEST_SIZE) == 0) {
            ret = signers;
            break;
        }
        signers = signers->next;
    }
    wc_UnLockMutex(&cm->caLock);

    return ret;
}


#ifndef NO_SKID
/* return CA if found, otherwise NULL. Walk through hash table. */
Signer* GetCAByName(void* vp, byte* hash)
{
    WOLFSSL_CERT_MANAGER* cm = (WOLFSSL_CERT_MANAGER*)vp;
    Signer* ret = NULL;
    Signer* signers;
    word32  row;

    if (cm == NULL)
        return NULL;

    if (wc_LockMutex(&cm->caLock) != 0)
        return ret;

    for (row = 0; row < CA_TABLE_SIZE && ret == NULL; row++) {
        signers = cm->caTable[row];
        while (signers && ret == NULL) {
            if (XMEMCMP(hash, signers->subjectNameHash,
                        SIGNER_DIGEST_SIZE) == 0) {
                ret = signers;
            }
            signers = signers->next;
        }
    }
    wc_UnLockMutex(&cm->caLock);

    return ret;
}
#endif


#ifdef WOLFSSL_TRUST_PEER_CERT
/* add a trusted peer cert to linked list */
int AddTrustedPeer(WOLFSSL_CERT_MANAGER* cm, DerBuffer** pDer, int verify)
{
    int ret, row;
    TrustedPeerCert* peerCert;
    DecodedCert* cert;
    DerBuffer*   der = *pDer;
    byte* subjectHash = NULL;

    WOLFSSL_MSG("Adding a Trusted Peer Cert");

    cert = (DecodedCert*)XMALLOC(sizeof(DecodedCert), cm->heap,
                                 DYNAMIC_TYPE_DCERT);
    if (cert == NULL) {
        FreeDer(&der);
        return MEMORY_E;
    }

    InitDecodedCert(cert, der->buffer, der->length, cm->heap);
    if ((ret = ParseCert(cert, TRUSTED_PEER_TYPE, verify, cm)) != 0) {
        FreeDecodedCert(cert);
        XFREE(cert, NULL, DYNAMIC_TYPE_DCERT);
        FreeDer(&der);
        return ret;
    }
    WOLFSSL_MSG("\tParsed new trusted peer cert");

    peerCert = (TrustedPeerCert*)XMALLOC(sizeof(TrustedPeerCert), cm->heap,
                                                             DYNAMIC_TYPE_CERT);
    if (peerCert == NULL) {
        FreeDecodedCert(cert);
        XFREE(cert, cm->heap, DYNAMIC_TYPE_DCERT);
        FreeDer(&der);
        return MEMORY_E;
    }
    XMEMSET(peerCert, 0, sizeof(TrustedPeerCert));

#ifndef NO_SKID
    if (cert->extAuthKeyIdSet) {
        subjectHash = cert->extSubjKeyId;
    }
    else {
        subjectHash = cert->subjectHash;
    }
#else
    subjectHash = cert->subjectHash;
#endif

    #ifndef IGNORE_NAME_CONSTRAINTS
        if (peerCert->permittedNames)
            FreeNameSubtrees(peerCert->permittedNames, cm->heap);
        if (peerCert->excludedNames)
            FreeNameSubtrees(peerCert->excludedNames, cm->heap);
    #endif

    if (AlreadyTrustedPeer(cm, subjectHash)) {
        WOLFSSL_MSG("\tAlready have this CA, not adding again");
        FreeTrustedPeer(peerCert, cm->heap);
        (void)ret;
    }
    else {
        /* add trusted peer signature */
        peerCert->sigLen = cert->sigLength;
        peerCert->sig = (byte *)XMALLOC(cert->sigLength, cm->heap,
                                                        DYNAMIC_TYPE_SIGNATURE);
        if (peerCert->sig == NULL) {
            FreeDecodedCert(cert);
            XFREE(cert, cm->heap, DYNAMIC_TYPE_DCERT);
            FreeTrustedPeer(peerCert, cm->heap);
            FreeDer(&der);
            return MEMORY_E;
        }
        XMEMCPY(peerCert->sig, cert->signature, cert->sigLength);

        /* add trusted peer name */
        peerCert->nameLen = cert->subjectCNLen;
        peerCert->name    = cert->subjectCN;
        #ifndef IGNORE_NAME_CONSTRAINTS
            peerCert->permittedNames = cert->permittedNames;
            peerCert->excludedNames  = cert->excludedNames;
        #endif

        /* add SKID when available and hash of name */
        #ifndef NO_SKID
            XMEMCPY(peerCert->subjectKeyIdHash, cert->extSubjKeyId,
                    SIGNER_DIGEST_SIZE);
        #endif
            XMEMCPY(peerCert->subjectNameHash, cert->subjectHash,
                    SIGNER_DIGEST_SIZE);
            peerCert->next    = NULL; /* If Key Usage not set, all uses valid. */
            cert->subjectCN = 0;
        #ifndef IGNORE_NAME_CONSTRAINTS
            cert->permittedNames = NULL;
            cert->excludedNames = NULL;
        #endif

        #ifndef NO_SKID
            if (cert->extAuthKeyIdSet) {
                row = TrustedPeerHashSigner(peerCert->subjectKeyIdHash);
            }
            else {
                row = TrustedPeerHashSigner(peerCert->subjectNameHash);
            }
        #else
            row = TrustedPeerHashSigner(peerCert->subjectNameHash);
        #endif

            if (wc_LockMutex(&cm->tpLock) == 0) {
                peerCert->next = cm->tpTable[row];
                cm->tpTable[row] = peerCert;   /* takes ownership */
                wc_UnLockMutex(&cm->tpLock);
            }
            else {
                WOLFSSL_MSG("\tTrusted Peer Cert Mutex Lock failed");
                FreeDecodedCert(cert);
                XFREE(cert, cm->heap, DYNAMIC_TYPE_DCERT);
                FreeTrustedPeer(peerCert, cm->heap);
                FreeDer(&der);
                return BAD_MUTEX_E;
            }
        }

    WOLFSSL_MSG("\tFreeing parsed trusted peer cert");
    FreeDecodedCert(cert);
    XFREE(cert, cm->heap, DYNAMIC_TYPE_DCERT);
    WOLFSSL_MSG("\tFreeing der trusted peer cert");
    FreeDer(&der);
    WOLFSSL_MSG("\t\tOK Freeing der trusted peer cert");
    WOLFSSL_LEAVE("AddTrustedPeer", ret);

    return WOLFSSL_SUCCESS;
}
#endif /* WOLFSSL_TRUST_PEER_CERT */


/* owns der, internal now uses too */
/* type flag ids from user or from chain received during verify
   don't allow chain ones to be added w/o isCA extension */
int AddCA(WOLFSSL_CERT_MANAGER* cm, DerBuffer** pDer, int type, int verify)
{
    int         ret;
    Signer*     signer = NULL;
    word32      row;
    byte*       subjectHash;
#ifdef WOLFSSL_SMALL_STACK
    DecodedCert* cert = NULL;
#else
    DecodedCert  cert[1];
#endif
    DerBuffer*   der = *pDer;

    WOLFSSL_MSG("Adding a CA");

    if (cm == NULL) {
        FreeDer(pDer);
        return BAD_FUNC_ARG;
    }

#ifdef WOLFSSL_SMALL_STACK
    cert = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL,
                                 DYNAMIC_TYPE_DCERT);
    if (cert == NULL) {
        FreeDer(pDer);
        return MEMORY_E;
    }
#endif

    InitDecodedCert(cert, der->buffer, der->length, cm->heap);
    ret = ParseCert(cert, CA_TYPE, verify, cm);
    WOLFSSL_MSG("\tParsed new CA");

#ifndef NO_SKID
    subjectHash = cert->extSubjKeyId;
#else
    subjectHash = cert->subjectHash;
#endif

    /* check CA key size */
    if (verify) {
        switch (cert->keyOID) {
            #ifndef NO_RSA
            case RSAk:
                if (cm->minRsaKeySz < 0 ||
                                   cert->pubKeySize < (word16)cm->minRsaKeySz) {
                    ret = RSA_KEY_SIZE_E;
                    WOLFSSL_MSG("\tCA RSA key size error");
                }
                break;
            #endif /* !NO_RSA */
            #ifdef HAVE_ECC
            case ECDSAk:
                if (cm->minEccKeySz < 0 ||
                                   cert->pubKeySize < (word16)cm->minEccKeySz) {
                    ret = ECC_KEY_SIZE_E;
                    WOLFSSL_MSG("\tCA ECC key size error");
                }
                break;
            #endif /* HAVE_ECC */
            #ifdef HAVE_ED25519
            case ED25519k:
                if (cm->minEccKeySz < 0 ||
                                   ED25519_KEY_SIZE < (word16)cm->minEccKeySz) {
                    ret = ECC_KEY_SIZE_E;
                    WOLFSSL_MSG("\tCA ECC key size error");
                }
                break;
            #endif /* HAVE_ED25519 */
            #ifdef HAVE_ED448
            case ED448k:
                if (cm->minEccKeySz < 0 ||
                                     ED448_KEY_SIZE < (word16)cm->minEccKeySz) {
                    ret = ECC_KEY_SIZE_E;
                    WOLFSSL_MSG("\tCA ECC key size error");
                }
                break;
            #endif /* HAVE_ED448 */

            default:
                WOLFSSL_MSG("\tNo key size check done on CA");
                break; /* no size check if key type is not in switch */
        }
    }

    if (ret == 0 && cert->isCA == 0 && type != WOLFSSL_USER_CA) {
        WOLFSSL_MSG("\tCan't add as CA if not actually one");
        ret = NOT_CA_ERROR;
    }
#ifndef ALLOW_INVALID_CERTSIGN
    else if (ret == 0 && cert->isCA == 1 && type != WOLFSSL_USER_CA &&
        !cert->selfSigned && (cert->extKeyUsage & KEYUSE_KEY_CERT_SIGN) == 0) {
        /* Intermediate CA certs are required to have the keyCertSign
        * extension set. User loaded root certs are not. */
        WOLFSSL_MSG("\tDoesn't have key usage certificate signing");
        ret = NOT_CA_ERROR;
    }
#endif
    else if (ret == 0 && AlreadySigner(cm, subjectHash)) {
        WOLFSSL_MSG("\tAlready have this CA, not adding again");
        (void)ret;
    }
    else if (ret == 0) {
        /* take over signer parts */
        signer = MakeSigner(cm->heap);
        if (!signer)
            ret = MEMORY_ERROR;
    }
    if (ret == 0 && signer != NULL) {
    #ifdef WOLFSSL_SIGNER_DER_CERT
        ret = AllocDer(&signer->derCert, der->length, der->type, NULL);
    }
    if (ret == 0 && signer != NULL) {
        XMEMCPY(signer->derCert->buffer, der->buffer, der->length);
    #endif
        signer->keyOID         = cert->keyOID;
        if (cert->pubKeyStored) {
            signer->publicKey      = cert->publicKey;
            signer->pubKeySize     = cert->pubKeySize;
        }
        if (cert->subjectCNStored) {
            signer->nameLen        = cert->subjectCNLen;
            signer->name           = cert->subjectCN;
        }
        signer->pathLength     = cert->pathLength;
        signer->maxPathLen     = cert->maxPathLen;
        signer->pathLengthSet  = cert->pathLengthSet;
        signer->selfSigned     = cert->selfSigned;
    #ifndef IGNORE_NAME_CONSTRAINTS
        signer->permittedNames = cert->permittedNames;
        signer->excludedNames  = cert->excludedNames;
    #endif
    #ifndef NO_SKID
        XMEMCPY(signer->subjectKeyIdHash, cert->extSubjKeyId,
                SIGNER_DIGEST_SIZE);
    #endif
        XMEMCPY(signer->subjectNameHash, cert->subjectHash,
                SIGNER_DIGEST_SIZE);
    #ifdef HAVE_OCSP
        XMEMCPY(signer->subjectKeyHash, cert->subjectKeyHash,
                KEYID_SIZE);
    #endif
        signer->keyUsage = cert->extKeyUsageSet ? cert->extKeyUsage
                                                : 0xFFFF;
        signer->next    = NULL; /* If Key Usage not set, all uses valid. */
        cert->publicKey = 0;    /* in case lock fails don't free here.   */
        cert->subjectCN = 0;
    #ifndef IGNORE_NAME_CONSTRAINTS
        cert->permittedNames = NULL;
        cert->excludedNames = NULL;
    #endif

    #ifndef NO_SKID
        row = HashSigner(signer->subjectKeyIdHash);
    #else
        row = HashSigner(signer->subjectNameHash);
    #endif

        if (wc_LockMutex(&cm->caLock) == 0) {
            signer->next = cm->caTable[row];
            cm->caTable[row] = signer;   /* takes ownership */
            wc_UnLockMutex(&cm->caLock);
            if (cm->caCacheCallback)
                cm->caCacheCallback(der->buffer, (int)der->length, type);
        }
        else {
            WOLFSSL_MSG("\tCA Mutex Lock failed");
            ret = BAD_MUTEX_E;
            FreeSigner(signer, cm->heap);
        }
    }
#if defined(WOLFSSL_RENESAS_TSIP_TLS)
    /* Verify CA by TSIP so that generated tsip key is going to be able to */
    /* be used for peer's cert verification                                */
    /* TSIP is only able to handle USER CA, and only one CA.               */
    /* Therefore, it doesn't need to call TSIP again if there is already   */
    /* verified CA.                                                        */
    if ( ret == 0 && signer != NULL ) {
        signer->cm_idx = row;
        if (type == WOLFSSL_USER_CA && tsip_rootCAverified() == 0 ) {
            if ((ret = tsip_tls_RootCertVerify(cert->source, cert->maxIdx,
                 cert->sigCtx.pubkey_n_start, cert->sigCtx.pubkey_n_len - 1,
                 cert->sigCtx.pubkey_e_start, cert->sigCtx.pubkey_e_len - 1,
                 row/* cm index */))
                != 0)
                WOLFSSL_MSG("tsip_tls_RootCertVerify() failed");
            else
                WOLFSSL_MSG("tsip_tls_RootCertVerify() succeed");
        }
    }
#endif
    WOLFSSL_MSG("\tFreeing Parsed CA");
    FreeDecodedCert(cert);
#ifdef WOLFSSL_SMALL_STACK
    XFREE(cert, NULL, DYNAMIC_TYPE_DCERT);
#endif
    WOLFSSL_MSG("\tFreeing der CA");
    FreeDer(pDer);
    WOLFSSL_MSG("\t\tOK Freeing der CA");

    WOLFSSL_LEAVE("AddCA", ret);

    return ret == 0 ? WOLFSSL_SUCCESS : ret;
}

#endif /* !NO_CERTS */


#ifndef NO_SESSION_CACHE

    /* basic config gives a cache with 33 sessions, adequate for clients and
       embedded servers

       TITAN_SESSION_CACHE allows just over 2 million sessions, for servers
       with titanic amounts of memory with long session ID timeouts and high
       levels of traffic.

       HUGE_SESSION_CACHE yields 65,791 sessions, for servers under heavy load,
       allows over 13,000 new sessions per minute or over 200 new sessions per
       second

       BIG_SESSION_CACHE yields 20,027 sessions

       MEDIUM_SESSION_CACHE allows 1055 sessions, adequate for servers that
       aren't under heavy load, basically allows 200 new sessions per minute

       SMALL_SESSION_CACHE only stores 6 sessions, good for embedded clients
       or systems where the default of nearly 3kB is too much RAM, this define
       uses less than 500 bytes RAM

       default SESSION_CACHE stores 33 sessions (no XXX_SESSION_CACHE defined)
    */
    #if defined(TITAN_SESSION_CACHE)
        #define SESSIONS_PER_ROW 31
        #define SESSION_ROWS 64937
    #elif defined(HUGE_SESSION_CACHE)
        #define SESSIONS_PER_ROW 11
        #define SESSION_ROWS 5981
    #elif defined(BIG_SESSION_CACHE)
        #define SESSIONS_PER_ROW 7
        #define SESSION_ROWS 2861
    #elif defined(MEDIUM_SESSION_CACHE)
        #define SESSIONS_PER_ROW 5
        #define SESSION_ROWS 211
    #elif defined(SMALL_SESSION_CACHE)
        #define SESSIONS_PER_ROW 2
        #define SESSION_ROWS 3
    #else
        #define SESSIONS_PER_ROW 3
        #define SESSION_ROWS 11
    #endif

    typedef struct SessionRow {
        int nextIdx;                           /* where to place next one   */
        int totalCount;                        /* sessions ever on this row */
        WOLFSSL_SESSION Sessions[SESSIONS_PER_ROW];
    } SessionRow;

    static WOLFSSL_GLOBAL SessionRow SessionCache[SESSION_ROWS];

    #if defined(WOLFSSL_SESSION_STATS) && defined(WOLFSSL_PEAK_SESSIONS)
        static WOLFSSL_GLOBAL word32 PeakSessions;
    #endif

    static WOLFSSL_GLOBAL wolfSSL_Mutex session_mutex; /* SessionCache mutex */

    #ifndef NO_CLIENT_CACHE

        typedef struct ClientSession {
            word16 serverRow;            /* SessionCache Row id */
            word16 serverIdx;            /* SessionCache Idx (column) */
        } ClientSession;

        typedef struct ClientRow {
            int nextIdx;                /* where to place next one   */
            int totalCount;             /* sessions ever on this row */
            ClientSession Clients[SESSIONS_PER_ROW];
        } ClientRow;

        static WOLFSSL_GLOBAL ClientRow ClientCache[SESSION_ROWS];
                                                     /* Client Cache */
                                                     /* uses session mutex */
    #endif  /* NO_CLIENT_CACHE */

#endif /* NO_SESSION_CACHE */

#if defined(OPENSSL_EXTRA) || \
    (defined(OPENSSL_EXTRA_X509_SMALL) && !defined(NO_RSA))

    #define HAVE_GLOBAL_RNG /* consolidate flags for using globalRNG */
    static WC_RNG globalRNG;
    static int initGlobalRNG = 0;
    static wolfSSL_Mutex globalRNGMutex;
#endif

#if defined(OPENSSL_EXTRA) && !defined(WOLFSSL_NO_OPENSSL_RAND_CB)
static int wolfSSL_RAND_InitMutex(void)
{
    if (gRandMethodsInit == 0) {
        if (wc_InitMutex(&gRandMethodMutex) != 0) {
            WOLFSSL_MSG("Bad Init Mutex rand methods");
            return BAD_MUTEX_E;
        }
        gRandMethodsInit = 1;
    }
    return 0;
}
#endif

WOLFSSL_ABI
int wolfSSL_Init(void)
{
    WOLFSSL_ENTER("wolfSSL_Init");

    if (initRefCount == 0) {
        /* Initialize crypto for use with TLS connection */
        if (wolfCrypt_Init() != 0) {
            WOLFSSL_MSG("Bad wolfCrypt Init");
            return WC_INIT_E;
        }

#ifdef HAVE_GLOBAL_RNG
        if (wc_InitMutex(&globalRNGMutex) != 0) {
            WOLFSSL_MSG("Bad Init Mutex rng");
            return BAD_MUTEX_E;
        }
#endif

#ifdef OPENSSL_EXTRA
    #ifndef WOLFSSL_NO_OPENSSL_RAND_CB
        if (wolfSSL_RAND_InitMutex() != 0) {
            return BAD_MUTEX_E;
        }
    #endif
        if (wolfSSL_RAND_seed(NULL, 0) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("wolfSSL_RAND_Seed failed");
            return WC_INIT_E;
        }
#endif

#ifndef NO_SESSION_CACHE
        if (wc_InitMutex(&session_mutex) != 0) {
            WOLFSSL_MSG("Bad Init Mutex session");
            return BAD_MUTEX_E;
        }
#endif
        if (wc_InitMutex(&count_mutex) != 0) {
            WOLFSSL_MSG("Bad Init Mutex count");
            return BAD_MUTEX_E;
        }
    }

    if (wc_LockMutex(&count_mutex) != 0) {
        WOLFSSL_MSG("Bad Lock Mutex count");
        return BAD_MUTEX_E;
    }

    initRefCount++;
    wc_UnLockMutex(&count_mutex);

    return WOLFSSL_SUCCESS;
}



#ifndef NO_CERTS

/* process user cert chain to pass during the handshake */
static int ProcessUserChain(WOLFSSL_CTX* ctx, const unsigned char* buff,
                         long sz, int format, int type, WOLFSSL* ssl,
                         long* used, EncryptedInfo* info, int verify)
{
    int ret = 0;
    void* heap = wolfSSL_CTX_GetHeap(ctx, ssl);
#ifdef WOLFSSL_TLS13
    int cnt = 0;
#endif

    if ((type == CA_TYPE) && (ctx == NULL)) {
        WOLFSSL_MSG("Need context for CA load");
        return BAD_FUNC_ARG;
    }

    /* we may have a user cert chain, try to consume */
    if ((type == CERT_TYPE || type == CA_TYPE) && (info->consumed < sz)) {
    #ifdef WOLFSSL_SMALL_STACK
        byte   staticBuffer[1];                 /* force heap usage */
    #else
        byte   staticBuffer[FILE_BUFFER_SIZE];  /* tmp chain buffer */
    #endif
        byte*  chainBuffer = staticBuffer;
        int    dynamicBuffer = 0;
        word32 bufferSz;
        long   consumed = info->consumed;
        word32 idx = 0;
        int    gotOne = 0;

        /* Calculate max possible size, including max headers */
        bufferSz = (word32)(sz - consumed) + (CERT_HEADER_SZ * MAX_CHAIN_DEPTH);
        if (bufferSz > sizeof(staticBuffer)) {
            WOLFSSL_MSG("Growing Tmp Chain Buffer");
            /* will shrink to actual size */
            chainBuffer = (byte*)XMALLOC(bufferSz, heap, DYNAMIC_TYPE_FILE);
            if (chainBuffer == NULL) {
                return MEMORY_E;
            }
            dynamicBuffer = 1;
        }

        WOLFSSL_MSG("Processing Cert Chain");
        while (consumed < sz) {
            DerBuffer* part = NULL;
            word32 remain = (word32)(sz - consumed);
            info->consumed = 0;

            if (format == WOLFSSL_FILETYPE_PEM) {
            #ifdef WOLFSSL_PEM_TO_DER
                ret = PemToDer(buff + consumed, remain, type, &part,
                               heap, info, NULL);
            #else
                ret = NOT_COMPILED_IN;
            #endif
            }
            else {
                int length = remain;
                if (format == WOLFSSL_FILETYPE_ASN1) {
                    /* get length of der (read sequence) */
                    word32 inOutIdx = 0;
                    if (GetSequence(buff + consumed, &inOutIdx, &length,
                            remain) < 0) {
                        ret = ASN_NO_PEM_HEADER;
                    }
                    length += inOutIdx; /* include leading sequence */
                }
                info->consumed = length;
                if (ret == 0) {
                    ret = AllocDer(&part, length, type, heap);
                    if (ret == 0) {
                        XMEMCPY(part->buffer, buff + consumed, length);
                    }
                }
            }
            if (ret == 0) {
                gotOne = 1;
#ifdef WOLFSSL_TLS13
                cnt++;
#endif
                if ((idx + part->length + CERT_HEADER_SZ) > bufferSz) {
                    WOLFSSL_MSG("   Cert Chain bigger than buffer");
                    ret = BUFFER_E;
                }
                else {
                    c32to24(part->length, &chainBuffer[idx]);
                    idx += CERT_HEADER_SZ;
                    XMEMCPY(&chainBuffer[idx], part->buffer, part->length);
                    idx += part->length;
                    consumed  += info->consumed;
                    if (used)
                        *used += info->consumed;
                }

                /* add CA's to certificate manager */
                if (type == CA_TYPE) {
                    /* verify CA unless user set to no verify */
                    ret = AddCA(ctx->cm, &part, WOLFSSL_USER_CA, verify);
                    gotOne = 0; /* don't exit loop for CA type */
                }
            }

            FreeDer(&part);

            if (ret == ASN_NO_PEM_HEADER && gotOne) {
                WOLFSSL_MSG("We got one good cert, so stuff at end ok");
                break;
            }

            if (ret < 0) {
                WOLFSSL_MSG("   Error in Cert in Chain");
                if (dynamicBuffer)
                    XFREE(chainBuffer, heap, DYNAMIC_TYPE_FILE);
                return ret;
            }
            WOLFSSL_MSG("   Consumed another Cert in Chain");
        }
        WOLFSSL_MSG("Finished Processing Cert Chain");

        /* only retain actual size used */
        ret = 0;
        if (idx > 0) {
            if (ssl) {
                if (ssl->buffers.weOwnCertChain) {
                    FreeDer(&ssl->buffers.certChain);
                }
                ret = AllocDer(&ssl->buffers.certChain, idx, type, heap);
                if (ret == 0) {
                    XMEMCPY(ssl->buffers.certChain->buffer, chainBuffer,
                            idx);
                    ssl->buffers.weOwnCertChain = 1;
                }
            #ifdef WOLFSSL_TLS13
                ssl->buffers.certChainCnt = cnt;
            #endif
            } else if (ctx) {
                FreeDer(&ctx->certChain);
                ret = AllocDer(&ctx->certChain, idx, type, heap);
                if (ret == 0) {
                    XMEMCPY(ctx->certChain->buffer, chainBuffer, idx);
                }
            #ifdef WOLFSSL_TLS13
                ctx->certChainCnt = cnt;
            #endif
            }
        }

        if (dynamicBuffer)
            XFREE(chainBuffer, heap, DYNAMIC_TYPE_FILE);
    }

    return ret;
}

static int ProcessBufferTryDecode(WOLFSSL_CTX* ctx, WOLFSSL* ssl, DerBuffer* der,
    int* keySz, word32* idx, int* resetSuites, int* keyFormat, void* heap, int devId)
{
    int ret = 0;

    (void)heap;
    (void)devId;

    if (ctx == NULL && ssl == NULL)
        ret = BAD_FUNC_ARG;
    if (!der || !keySz || !idx || !resetSuites || !keyFormat)
        ret = BAD_FUNC_ARG;

#ifndef NO_RSA
    if (ret == 0 && (*keyFormat == 0 || *keyFormat == RSAk)) {
        /* make sure RSA key can be used */
    #ifdef WOLFSSL_SMALL_STACK
        RsaKey* key;
    #else
        RsaKey  key[1];
    #endif

    #ifdef WOLFSSL_SMALL_STACK
        key = (RsaKey*)XMALLOC(sizeof(RsaKey), heap, DYNAMIC_TYPE_RSA);
        if (key == NULL)
            return MEMORY_E;
    #endif
        
        ret = wc_InitRsaKey_ex(key, heap, devId);
        if (ret == 0) {
            *idx = 0;
            if (wc_RsaPrivateKeyDecode(der->buffer, idx, key, der->length)
                != 0) {
            #if !defined(HAVE_ECC) && !defined(HAVE_ED25519) && \
                                                            !defined(HAVE_ED448)
                WOLFSSL_MSG("RSA decode failed and ECC/ED25519/ED448 not "
                            "enabled to try");
                ret = WOLFSSL_BAD_FILE;
            #endif
            }
            else {
                /* check that the size of the RSA key is enough */
                int minRsaSz = ssl ? ssl->options.minRsaKeySz :
                    ctx->minRsaKeySz;
                *keySz = wc_RsaEncryptSize((RsaKey*)key);
                if (*keySz < minRsaSz) {
                    ret = RSA_KEY_SIZE_E;
                    WOLFSSL_MSG("Private Key size too small");
                }

                if (ssl) {
                    ssl->buffers.keyType = rsa_sa_algo;
                    ssl->buffers.keySz = *keySz;
                }
                else {
                    ctx->privateKeyType = rsa_sa_algo;
                    ctx->privateKeySz = *keySz;
                }

                *keyFormat = RSAk;

                if (ssl && ssl->options.side == WOLFSSL_SERVER_END) {
                    ssl->options.haveStaticECC = 0;
                    *resetSuites = 1;
                }
            }

            wc_FreeRsaKey(key);
        }

    #ifdef WOLFSSL_SMALL_STACK
        XFREE(key, heap, DYNAMIC_TYPE_RSA);
    #endif
    }
#endif
#ifdef HAVE_ECC
    if (ret == 0 && (*keyFormat == 0 || *keyFormat == ECDSAk)) {
        /* make sure ECC key can be used */
    #ifdef WOLFSSL_SMALL_STACK
        ecc_key* key;
    #else
        ecc_key  key[1];
    #endif

    #ifdef WOLFSSL_SMALL_STACK
        key = (ecc_key*)XMALLOC(sizeof(ecc_key), heap, DYNAMIC_TYPE_ECC);
        if (key == NULL)
            return MEMORY_E;
    #endif

        if (wc_ecc_init_ex(key, heap, devId) == 0) {
            *idx = 0;
            if (wc_EccPrivateKeyDecode(der->buffer, idx, key,
                                                        der->length) == 0) {
                /* check for minimum ECC key size and then free */
                int minKeySz = ssl ? ssl->options.minEccKeySz :
                                                        ctx->minEccKeySz;
                *keySz = wc_ecc_size(key);
                if (*keySz < minKeySz) {
                    WOLFSSL_MSG("ECC private key too small");
                    ret = ECC_KEY_SIZE_E;
                }

                *keyFormat = ECDSAk;
                if (ssl) {
                    ssl->options.haveStaticECC = 1;
                    ssl->buffers.keyType = ecc_dsa_sa_algo;
                    ssl->buffers.keySz = *keySz;
                }
                else {
                    ctx->haveStaticECC = 1;
                    ctx->privateKeyType = ecc_dsa_sa_algo;
                    ctx->privateKeySz = *keySz;
                }

                if (ssl && ssl->options.side == WOLFSSL_SERVER_END) {
                    *resetSuites = 1;
                }
            }

            wc_ecc_free(key);
        }

    #ifdef WOLFSSL_SMALL_STACK
        XFREE(key, heap, DYNAMIC_TYPE_ECC);
    #endif
    }
#endif /* HAVE_ECC */
#ifdef HAVE_ED25519
    if (ret == 0 && (*keyFormat == 0 || *keyFormat == ED25519k)) {
        /* make sure Ed25519 key can be used */
    #ifdef WOLFSSL_SMALL_STACK
        ed25519_key* key;
    #else
        ed25519_key  key[1];
    #endif

    #ifdef WOLFSSL_SMALL_STACK
        key = (ed25519_key*)XMALLOC(sizeof(ed25519_key), heap,
                                                      DYNAMIC_TYPE_ED25519);
        if (key == NULL)
            return MEMORY_E;
    #endif

        ret = wc_ed25519_init(key);
        if (ret == 0) {
            *idx = 0;
            if (wc_Ed25519PrivateKeyDecode(der->buffer, idx, key,
                                                        der->length) == 0) {
                /* check for minimum key size and then free */
                int minKeySz = ssl ? ssl->options.minEccKeySz :
                                                           ctx->minEccKeySz;
                *keySz = ED25519_KEY_SIZE;
                if (*keySz < minKeySz) {
                    WOLFSSL_MSG("ED25519 private key too small");
                    ret = ECC_KEY_SIZE_E;
                }
                if (ret == 0) {
                    if (ssl) {
                        ssl->buffers.keyType = ed25519_sa_algo;
                        ssl->buffers.keySz = *keySz;
                    }
                    else if (ctx) {
                        ctx->privateKeyType = ed25519_sa_algo;
                        ctx->privateKeySz = *keySz;
                    }

                    *keyFormat = ED25519k;
                    if (ssl && ssl->options.side == WOLFSSL_SERVER_END) {
                        *resetSuites = 1;
                    }
                }
            }

            wc_ed25519_free(key);
        }

    #ifdef WOLFSSL_SMALL_STACK
        XFREE(key, heap, DYNAMIC_TYPE_ED25519);
    #endif
    }
#endif /* HAVE_ED25519 */
#ifdef HAVE_ED448
    if (ret == 0 && (*keyFormat == 0 || *keyFormat == ED448k)) {
        /* make sure Ed448 key can be used */
    #ifdef WOLFSSL_SMALL_STACK
        ed448_key* key = NULL;
    #else
        ed448_key  key[1];
    #endif

    #ifdef WOLFSSL_SMALL_STACK
        key = (ed448_key*)XMALLOC(sizeof(ed448_key), heap, DYNAMIC_TYPE_ED448);
        if (key == NULL)
            return MEMORY_E;
    #endif

        ret = wc_ed448_init(key);
        if (ret == 0) {
            *idx = 0;
            if (wc_Ed448PrivateKeyDecode(der->buffer, idx, key,
                                                            der->length) != 0) {
                ret = WOLFSSL_BAD_FILE;
            }

            if (ret == 0) {
                /* check for minimum key size and then free */
                int minKeySz = ssl ? ssl->options.minEccKeySz :
                                                               ctx->minEccKeySz;
                *keySz = ED448_KEY_SIZE;
                if (*keySz < minKeySz) {
                    WOLFSSL_MSG("ED448 private key too small");
                    ret = ECC_KEY_SIZE_E;
                }
            }
            if (ret == 0) {
                if (ssl) {
                    ssl->buffers.keyType = ed448_sa_algo;
                    ssl->buffers.keySz = *keySz;
                }
                else if (ctx) {
                    ctx->privateKeyType = ed448_sa_algo;
                    ctx->privateKeySz = *keySz;
                }

                *keyFormat = ED448k;
                if (ssl && ssl->options.side == WOLFSSL_SERVER_END) {
                    *resetSuites = 1;
                }
            }

            wc_ed448_free(key);
        }

    #ifdef WOLFSSL_SMALL_STACK
        XFREE(key, heap, DYNAMIC_TYPE_ED448);
    #endif
    }
#endif /* HAVE_ED448 */
    return ret;
}

/* process the buffer buff, length sz, into ctx of format and type
   used tracks bytes consumed, userChain specifies a user cert chain
   to pass during the handshake */
int ProcessBuffer(WOLFSSL_CTX* ctx, const unsigned char* buff,
                         long sz, int format, int type, WOLFSSL* ssl,
                         long* used, int userChain, int verify)
{
    DerBuffer*    der = NULL;        /* holds DER or RAW (for NTRU) */
    int           ret = 0;
    int           done = 0;
    int           keyFormat = 0;
    int           resetSuites = 0;
    void*         heap = wolfSSL_CTX_GetHeap(ctx, ssl);
    int           devId = wolfSSL_CTX_GetDevId(ctx, ssl);
    word32        idx = 0;
    int           keySz = 0;
#if (defined(WOLFSSL_ENCRYPTED_KEYS) && !defined(NO_PWDBASED)) || \
     defined(HAVE_PKCS8)
    word32        algId = 0;
#endif
#ifdef WOLFSSL_SMALL_STACK
    EncryptedInfo* info = NULL;
#else
    EncryptedInfo  info[1];
#endif

    (void)devId;
    (void)idx;
    (void)keySz;

    if (used)
        *used = sz;     /* used bytes default to sz, PEM chain may shorten*/

    /* check args */
    if (format != WOLFSSL_FILETYPE_ASN1 && format != WOLFSSL_FILETYPE_PEM
                                    && format != WOLFSSL_FILETYPE_RAW)
        return WOLFSSL_BAD_FILETYPE;

    if (ctx == NULL && ssl == NULL)
        return BAD_FUNC_ARG;

#ifdef WOLFSSL_SMALL_STACK
    info = (EncryptedInfo*)XMALLOC(sizeof(EncryptedInfo), heap,
                                   DYNAMIC_TYPE_ENCRYPTEDINFO);
    if (info == NULL)
        return MEMORY_E;
#endif

    XMEMSET(info, 0, sizeof(EncryptedInfo));
#if defined(WOLFSSL_ENCRYPTED_KEYS) && !defined(NO_PWDBASED)
    if (ctx) {
        info->passwd_cb       = ctx->passwd_cb;
        info->passwd_userdata = ctx->passwd_userdata;
    }
#endif

    if (format == WOLFSSL_FILETYPE_PEM) {
    #ifdef WOLFSSL_PEM_TO_DER
        ret = PemToDer(buff, sz, type, &der, heap, info, &keyFormat);
    #else
        ret = NOT_COMPILED_IN;
    #endif
    }
    else {
        /* ASN1 (DER) or RAW (NTRU) */
        int length = (int)sz;
        if (format == WOLFSSL_FILETYPE_ASN1) {
            /* get length of der (read sequence or octet string) */
            word32 inOutIdx = 0;
            if (GetSequence(buff, &inOutIdx, &length, (word32)sz) >= 0) {
                length += inOutIdx; /* include leading sequence */
            }
            /* get length using octect string (allowed for private key types) */
            else if (type == PRIVATEKEY_TYPE &&
                    GetOctetString(buff, &inOutIdx, &length, (word32)sz) >= 0) {
                length += inOutIdx; /* include leading oct string */
            }
            else {
                ret = ASN_PARSE_E;
            }
        }

        info->consumed = length;

        if (ret == 0) {
            ret = AllocDer(&der, (word32)length, type, heap);
            if (ret == 0) {
                XMEMCPY(der->buffer, buff, length);
            }

        #ifdef HAVE_PKCS8
            /* if private key try and remove PKCS8 header */
            if (type == PRIVATEKEY_TYPE) {
                if ((ret = ToTraditional_ex(der->buffer, der->length, &algId)) > 0) {
                    /* Found PKCS8 header */
                    /* ToTraditional_ex moves buff and returns adjusted length */
                    der->length = ret;
                }
                ret = 0; /* failures should be ignored */
            }
        #endif
        }
    }

    if (used) {
        *used = info->consumed;
    }

    /* process user chain */
    if (ret >= 0) {
        /* Chain should have server cert first, then intermediates, then root.
         * First certificate in chain is processed below after ProcessUserChain
         *   and is loaded into ssl->buffers.certificate.
         * Remainder are processed using ProcessUserChain and are loaded into
         *   ssl->buffers.certChain. */
        if (userChain) {
            ret = ProcessUserChain(ctx, buff, sz, format, type, ssl, used, info,
                                   verify);
        }
    }

    /* info is only used for private key with DER or PEM, so free now */
    if (ret < 0 || type != PRIVATEKEY_TYPE || format == WOLFSSL_FILETYPE_RAW) {
    #ifdef WOLFSSL_SMALL_STACK
        XFREE(info, heap, DYNAMIC_TYPE_ENCRYPTEDINFO);
    #endif
    }

    /* check for error */
    if (ret < 0) {
        FreeDer(&der);
        done = 1;
    }

    if (done == 1) {
        /* No operation, just skip the next section */
    }
    /* Handle DER owner */
    else if (type == CA_TYPE) {
        if (ctx == NULL) {
            WOLFSSL_MSG("Need context for CA load");
            FreeDer(&der);
            return BAD_FUNC_ARG;
        }
        /* verify CA unless user set to no verify */
        ret = AddCA(ctx->cm, &der, WOLFSSL_USER_CA, verify);
        done = 1;
    }
#ifdef WOLFSSL_TRUST_PEER_CERT
    else if (type == TRUSTED_PEER_TYPE) {
        if (ctx == NULL) {
            WOLFSSL_MSG("Need context for trusted peer cert load");
            FreeDer(&der);
            return BAD_FUNC_ARG;
        }
        /* add trusted peer cert. der is freed within */
        ret = AddTrustedPeer(ctx->cm, &der, !ctx->verifyNone);
        if (ret != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Error adding trusted peer");
        }
        done = 1;
    }
#endif /* WOLFSSL_TRUST_PEER_CERT */
    else if (type == CERT_TYPE) {
        if (ssl) {
             /* Make sure previous is free'd */
            if (ssl->buffers.weOwnCert) {
                FreeDer(&ssl->buffers.certificate);
            #ifdef KEEP_OUR_CERT
                wolfSSL_X509_free(ssl->ourCert);
                ssl->ourCert = NULL;
            #endif
            }
            ssl->buffers.certificate = der;
        #ifdef KEEP_OUR_CERT
            ssl->keepCert = 1; /* hold cert for ssl lifetime */
        #endif
            ssl->buffers.weOwnCert = 1;
        }
        else if (ctx) {
            FreeDer(&ctx->certificate); /* Make sure previous is free'd */
        #ifdef KEEP_OUR_CERT
            if (ctx->ourCert) {
                if (ctx->ownOurCert)
                    wolfSSL_X509_free(ctx->ourCert);
                ctx->ourCert = NULL;
            }
        #endif
            ctx->certificate = der;
        }
    }
    else if (type == PRIVATEKEY_TYPE) {
        if (ssl) {
             /* Make sure previous is free'd */
            if (ssl->buffers.weOwnKey) {
                FreeDer(&ssl->buffers.key);
            }
            ssl->buffers.key = der;
            ssl->buffers.weOwnKey = 1;
        }
        else if (ctx) {
            FreeDer(&ctx->privateKey);
            ctx->privateKey = der;
        }
    }
    else {
        FreeDer(&der);
        return WOLFSSL_BAD_CERTTYPE;
    }

    if (done == 1) {
        /* No operation, just skip the next section */
    }
    else if (type == PRIVATEKEY_TYPE && format != WOLFSSL_FILETYPE_RAW) {
    #if defined(WOLFSSL_ENCRYPTED_KEYS) || defined(HAVE_PKCS8)
        keyFormat = algId;
    #endif

        ret = ProcessBufferTryDecode(ctx, ssl, der, &keySz, &idx, &resetSuites,
                &keyFormat, heap, devId);

    #if defined(WOLFSSL_ENCRYPTED_KEYS) && !defined(NO_PWDBASED)
        /* for WOLFSSL_FILETYPE_PEM, PemToDer manages the decryption */
        /* If private key type PKCS8 header wasn't already removed (algoId == 0) */
        if ((ret != 0 || keyFormat == 0)
            && format != WOLFSSL_FILETYPE_PEM && info->passwd_cb && algId == 0)
        {
            int   passwordSz = NAME_SZ;
        #ifndef WOLFSSL_SMALL_STACK
            char  password[NAME_SZ];
        #else
            char* password = (char*)XMALLOC(passwordSz, heap, DYNAMIC_TYPE_STRING);
            if (password == NULL) {
            #ifdef WOLFSSL_SMALL_STACK
                XFREE(info, heap, DYNAMIC_TYPE_ENCRYPTEDINFO);
            #endif
                FreeDer(&der);
                return MEMORY_E;
            }
        #endif
            /* get password */
            ret = info->passwd_cb(password, passwordSz, PEM_PASS_READ,
                info->passwd_userdata);
            if (ret >= 0) {
                passwordSz = ret;

                /* PKCS8 decrypt */
                ret = ToTraditionalEnc(der->buffer, der->length,
                                       password, passwordSz, &algId);
                if (ret >= 0) {
                    der->length = ret;
                }
                /* ignore failures and try parsing as unencrypted */

                ForceZero(password, passwordSz);
            }

        #ifdef WOLFSSL_SMALL_STACK
            XFREE(password, heap, DYNAMIC_TYPE_STRING);
        #endif
            ret = ProcessBufferTryDecode(ctx, ssl, der, &keySz, &idx,
                &resetSuites, &keyFormat, heap, devId);
        }
    #endif /* WOLFSSL_ENCRYPTED_KEYS && !NO_PWDBASED */

    #ifdef WOLFSSL_SMALL_STACK
        XFREE(info, heap, DYNAMIC_TYPE_ENCRYPTEDINFO);
    #endif

        if (ret != 0)
            return ret;
        if (keyFormat == 0) {
#ifdef OPENSSL_EXTRA
            /* Reaching this point probably means that the
             * decryption password is wrong */
            if (info->passwd_cb)
                EVPerr(0, EVP_R_BAD_DECRYPT);
#endif
            return WOLFSSL_BAD_FILE;
        }

        (void)devId;
    }
    else if (type == CERT_TYPE) {
    #ifdef WOLFSSL_SMALL_STACK
        DecodedCert* cert;
    #else
        DecodedCert  cert[1];
    #endif
    #if defined(HAVE_PKCS11) || defined(HAVE_PK_CALLBACKS)
        int keyType = 0;
    #endif

    #ifdef WOLFSSL_SMALL_STACK
        cert = (DecodedCert*)XMALLOC(sizeof(DecodedCert), heap,
                                     DYNAMIC_TYPE_DCERT);
        if (cert == NULL)
            return MEMORY_E;
    #endif

        WOLFSSL_MSG("Checking cert signature type");
        InitDecodedCert(cert, der->buffer, der->length, heap);

        if (DecodeToKey(cert, 0) < 0) {
            WOLFSSL_MSG("Decode to key failed");
            FreeDecodedCert(cert);
        #ifdef WOLFSSL_SMALL_STACK
            XFREE(cert, heap, DYNAMIC_TYPE_DCERT);
        #endif
            return WOLFSSL_BAD_FILE;
        }

        if (ssl && ssl->options.side == WOLFSSL_SERVER_END) {
            resetSuites = 1;
        }
        if (ssl && ssl->ctx->haveECDSAsig) {
            WOLFSSL_MSG("SSL layer setting cert, CTX had ECDSA, turning off");
            ssl->options.haveECDSAsig = 0;   /* may turn back on next */
        }

        switch (cert->signatureOID) {
            case CTC_SHAwECDSA:
            case CTC_SHA256wECDSA:
            case CTC_SHA384wECDSA:
            case CTC_SHA512wECDSA:
            case CTC_ED25519:
            case CTC_ED448:
                WOLFSSL_MSG("ECDSA/ED25519/ED448 cert signature");
                if (ssl)
                    ssl->options.haveECDSAsig = 1;
                else if (ctx)
                    ctx->haveECDSAsig = 1;
                break;
            default:
                WOLFSSL_MSG("Not ECDSA cert signature");
                break;
        }

    #if defined(HAVE_ECC) || defined(HAVE_ED25519) || defined(HAVE_ED448)
        if (ssl) {
            ssl->pkCurveOID = cert->pkCurveOID;
        #ifndef WC_STRICT_SIG
            if (cert->keyOID == ECDSAk) {
                ssl->options.haveECC = 1;
            }
            #ifdef HAVE_ED25519
                else if (cert->keyOID == ED25519k) {
                    ssl->options.haveECC = 1;
                }
            #endif
            #ifdef HAVE_ED448
                else if (cert->keyOID == ED448k) {
                    ssl->options.haveECC = 1;
                }
            #endif
        #else
            ssl->options.haveECC = ssl->options.haveECDSAsig;
        #endif
        }
        else if (ctx) {
            ctx->pkCurveOID = cert->pkCurveOID;
        #ifndef WC_STRICT_SIG
            if (cert->keyOID == ECDSAk) {
                ctx->haveECC = 1;
            }
            #ifdef HAVE_ED25519
                else if (cert->keyOID == ED25519k) {
                    ctx->haveECC = 1;
                }
            #endif
            #ifdef HAVE_ED448
                else if (cert->keyOID == ED448k) {
                    ctx->haveECC = 1;
                }
            #endif
        #else
            ctx->haveECC = ctx->haveECDSAsig;
        #endif
        }
    #endif

        /* check key size of cert unless specified not to */
        switch (cert->keyOID) {
        #ifndef NO_RSA
            case RSAk:
            #if defined(HAVE_PKCS11) || defined(HAVE_PK_CALLBACKS)
                keyType = rsa_sa_algo;
            #endif
                /* Determine RSA key size by parsing public key */
                idx = 0;
                ret = wc_RsaPublicKeyDecode_ex(cert->publicKey, &idx,
                    cert->pubKeySize, NULL, (word32*)&keySz, NULL, NULL);
                if (ret < 0)
                    break;

                if (ssl && !ssl->options.verifyNone) {
                    if (ssl->options.minRsaKeySz < 0 ||
                          keySz < (int)ssl->options.minRsaKeySz) {
                        ret = RSA_KEY_SIZE_E;
                        WOLFSSL_MSG("Certificate RSA key size too small");
                    }
                }
                else if (ctx && !ctx->verifyNone) {
                    if (ctx->minRsaKeySz < 0 ||
                                  keySz < (int)ctx->minRsaKeySz) {
                        ret = RSA_KEY_SIZE_E;
                        WOLFSSL_MSG("Certificate RSA key size too small");
                    }
                }
                break;
        #endif /* !NO_RSA */
        #ifdef HAVE_ECC
            case ECDSAk:
            #if defined(HAVE_PKCS11) || defined(HAVE_PK_CALLBACKS)
                keyType = ecc_dsa_sa_algo;
            #endif
                /* Determine ECC key size based on curve */
                keySz = wc_ecc_get_curve_size_from_id(
                    wc_ecc_get_oid(cert->pkCurveOID, NULL, NULL));

                if (ssl && !ssl->options.verifyNone) {
                    if (ssl->options.minEccKeySz < 0 ||
                          keySz < (int)ssl->options.minEccKeySz) {
                        ret = ECC_KEY_SIZE_E;
                        WOLFSSL_MSG("Certificate ECC key size error");
                    }
                }
                else if (ctx && !ctx->verifyNone) {
                    if (ctx->minEccKeySz < 0 ||
                                  keySz < (int)ctx->minEccKeySz) {
                        ret = ECC_KEY_SIZE_E;
                        WOLFSSL_MSG("Certificate ECC key size error");
                    }
                }
                break;
        #endif /* HAVE_ECC */
        #ifdef HAVE_ED25519
            case ED25519k:
            #if defined(HAVE_PKCS11) || defined(HAVE_PK_CALLBACKS)
                keyType = ed25519_sa_algo;
            #endif
                /* ED25519 is fixed key size */
                keySz = ED25519_KEY_SIZE;
                if (ssl && !ssl->options.verifyNone) {
                    if (ssl->options.minEccKeySz < 0 ||
                          keySz < (int)ssl->options.minEccKeySz) {
                        ret = ECC_KEY_SIZE_E;
                        WOLFSSL_MSG("Certificate Ed key size error");
                    }
                }
                else if (ctx && !ctx->verifyNone) {
                    if (ctx->minEccKeySz < 0 ||
                                  keySz < (int)ctx->minEccKeySz) {
                        ret = ECC_KEY_SIZE_E;
                        WOLFSSL_MSG("Certificate ECC key size error");
                    }
                }
                break;
        #endif /* HAVE_ED25519 */
        #ifdef HAVE_ED448
            case ED448k:
            #if defined(HAVE_PKCS11) || defined(HAVE_PK_CALLBACKS)
                keyType = ed448_sa_algo;
            #endif
                /* ED448 is fixed key size */
                keySz = ED448_KEY_SIZE;
                if (ssl && !ssl->options.verifyNone) {
                    if (ssl->options.minEccKeySz < 0 ||
                          keySz < (int)ssl->options.minEccKeySz) {
                        ret = ECC_KEY_SIZE_E;
                        WOLFSSL_MSG("Certificate Ed key size error");
                    }
                }
                else if (ctx && !ctx->verifyNone) {
                    if (ctx->minEccKeySz < 0 ||
                                  keySz < (int)ctx->minEccKeySz) {
                        ret = ECC_KEY_SIZE_E;
                        WOLFSSL_MSG("Certificate ECC key size error");
                    }
                }
                break;
        #endif /* HAVE_ED448 */

            default:
                WOLFSSL_MSG("No key size check done on certificate");
                break; /* do no check if not a case for the key */
        }

    #if defined(HAVE_PKCS11) || defined(HAVE_PK_CALLBACKS)
        if (ssl
        #ifdef HAVE_PK_CALLBACKS
                && ssl->buffers.keyType == 0
        #endif
            ) {
            ssl->buffers.keyType = keyType;
            ssl->buffers.keySz = keySz;
        }
        else if (ctx
        #ifdef HAVE_PK_CALLBACKS
                     && ctx->privateKeyType == 0
        #endif
            ) {
            ctx->privateKeyType = keyType;
            ctx->privateKeySz = keySz;
        }
    #endif

        FreeDecodedCert(cert);
    #ifdef WOLFSSL_SMALL_STACK
        XFREE(cert, heap, DYNAMIC_TYPE_DCERT);
    #endif

        if (ret != 0) {
            done = 1;
        }
    }

    if (done == 1) {
    #if !defined(NO_WOLFSSL_CM_VERIFY) && (!defined(NO_WOLFSSL_CLIENT) || \
                                           !defined(WOLFSSL_NO_CLIENT_AUTH))
        if ((type == CA_TYPE) || (type == CERT_TYPE)) {
            /* Call to over-ride status */
            if ((ctx != NULL) && (ctx->cm != NULL) &&
                (ctx->cm->verifyCallback != NULL)) {
                ret = CM_VerifyBuffer_ex(ctx->cm, buff,
                        sz, format, (ret == WOLFSSL_SUCCESS ? 0 : ret));
            }
        }
    #endif /* NO_WOLFSSL_CM_VERIFY */

        return ret;
    }


    if (ssl && resetSuites) {
        word16 havePSK = 0;
        word16 haveRSA = 0;

        #ifndef NO_PSK
        if (ssl->options.havePSK) {
            havePSK = 1;
        }
        #endif
        #ifndef NO_RSA
            haveRSA = 1;
        #endif
        #ifndef NO_CERTS
            keySz = ssl->buffers.keySz;
        #endif

        /* let's reset suites */
        InitSuites(ssl->suites, ssl->version, keySz, haveRSA,
                   havePSK, ssl->options.haveDH, ssl->options.haveNTRU,
                   ssl->options.haveECDSAsig, ssl->options.haveECC,
                   ssl->options.haveStaticECC, ssl->options.haveAnon,
                   ssl->options.side);
    }

    return WOLFSSL_SUCCESS;
}


/* CA PEM file for verification, may have multiple/chain certs to process */
static int ProcessChainBuffer(WOLFSSL_CTX* ctx, const unsigned char* buff,
                        long sz, int format, int type, WOLFSSL* ssl, int verify)
{
    long used   = 0;
    int  ret    = 0;
    int  gotOne = 0;

    WOLFSSL_MSG("Processing CA PEM file");
    while (used < sz) {
        long consumed = 0;

        ret = ProcessBuffer(ctx, buff + used, sz - used, format, type, ssl,
                            &consumed, 0, verify);

        if (ret < 0) {
#if defined(WOLFSSL_WPAS) && defined(HAVE_CRL)
            DerBuffer*    der = NULL;
            EncryptedInfo info;

            WOLFSSL_MSG("Trying a CRL");
            if (PemToDer(buff + used, sz - used, CRL_TYPE, &der, NULL, &info,
                                                                   NULL) == 0) {
                WOLFSSL_MSG("   Processed a CRL");
                wolfSSL_CertManagerLoadCRLBuffer(ctx->cm, der->buffer,
                                            der->length, WOLFSSL_FILETYPE_ASN1);
                FreeDer(&der);
                used += info.consumed;
                continue;
            }
#endif

            if (consumed > 0) { /* Made progress in file */
                WOLFSSL_ERROR(ret);
                WOLFSSL_MSG("CA Parse failed, with progress in file.");
                WOLFSSL_MSG("Search for other certs in file");
            }
            else {
                WOLFSSL_MSG("CA Parse failed, no progress in file.");
                WOLFSSL_MSG("Do not continue search for other certs in file");
                break;
            }
        }
        else {
            WOLFSSL_MSG("   Processed a CA");
            gotOne = 1;
        }
        used += consumed;
    }

    if (gotOne) {
        WOLFSSL_MSG("Processed at least one valid CA. Other stuff OK");
        return WOLFSSL_SUCCESS;
    }
    return ret;
}


static WC_INLINE WOLFSSL_METHOD* cm_pick_method(void)
{
    #ifndef NO_WOLFSSL_CLIENT
        #if !defined(NO_OLD_TLS) && defined(WOLFSSL_ALLOW_SSLV3)
            return wolfSSLv3_client_method();
        #elif !defined(NO_OLD_TLS) && defined(WOLFSSL_ALLOW_TLSV10)
            return wolfTLSv1_client_method();
        #elif !defined(NO_OLD_TLS)
            return wolfTLSv1_1_client_method();
        #elif !defined(WOLFSSL_NO_TLS12)
            return wolfTLSv1_2_client_method();
        #elif defined(WOLFSSL_TLS13)
            return wolfTLSv1_3_client_method();
        #else
            return NULL;
        #endif
    #elif !defined(NO_WOLFSSL_SERVER)
        #if !defined(NO_OLD_TLS) && defined(WOLFSSL_ALLOW_SSLV3)
            return wolfSSLv3_server_method();
        #elif !defined(NO_OLD_TLS) && defined(WOLFSSL_ALLOW_TLSV10)
            return wolfTLSv1_server_method();
        #elif !defined(NO_OLD_TLS)
            return wolfTLSv1_1_server_method();
        #elif !defined(WOLFSSL_NO_TLS12)
            return wolfTLSv1_2_server_method();
        #elif defined(WOLFSSL_TLS13)
            return wolfTLSv1_3_server_method();
        #else
            return NULL;
        #endif
    #else
        return NULL;
    #endif
}


/* like load verify locations, 1 for success, < 0 for error */
int wolfSSL_CertManagerLoadCABuffer(WOLFSSL_CERT_MANAGER* cm,
                                   const unsigned char* in, long sz, int format)
{
    int ret = WOLFSSL_FATAL_ERROR;
    WOLFSSL_CTX* tmp;

    WOLFSSL_ENTER("wolfSSL_CertManagerLoadCABuffer");

    if (cm == NULL) {
        WOLFSSL_MSG("No CertManager error");
        return ret;
    }
    tmp = wolfSSL_CTX_new(cm_pick_method());

    if (tmp == NULL) {
        WOLFSSL_MSG("CTX new failed");
        return ret;
    }

    /* for tmp use */
    wolfSSL_CertManagerFree(tmp->cm);
    tmp->cm = cm;

    ret = wolfSSL_CTX_load_verify_buffer(tmp, in, sz, format);

    /* don't loose our good one */
    tmp->cm = NULL;
    wolfSSL_CTX_free(tmp);

    return ret;
}

#ifdef HAVE_CRL

int wolfSSL_CertManagerLoadCRLBuffer(WOLFSSL_CERT_MANAGER* cm,
                                   const unsigned char* buff, long sz, int type)
{
    WOLFSSL_ENTER("wolfSSL_CertManagerLoadCRLBuffer");
    if (cm == NULL)
        return BAD_FUNC_ARG;

    if (cm->crl == NULL) {
        if (wolfSSL_CertManagerEnableCRL(cm, 0) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Enable CRL failed");
            return WOLFSSL_FATAL_ERROR;
        }
    }

    return BufferLoadCRL(cm->crl, buff, sz, type, VERIFY);
}

int wolfSSL_CertManagerFreeCRL(WOLFSSL_CERT_MANAGER* cm)
{
    WOLFSSL_ENTER("wolfSSL_CertManagerFreeCRL");
    if (cm == NULL)
        return BAD_FUNC_ARG;
    if (cm->crl != NULL){
        FreeCRL(cm->crl, 1);
        cm->crl = NULL;
    }
    return WOLFSSL_SUCCESS;
}

int wolfSSL_CTX_LoadCRLBuffer(WOLFSSL_CTX* ctx, const unsigned char* buff,
                              long sz, int type)
{
    WOLFSSL_ENTER("wolfSSL_CTX_LoadCRLBuffer");

    if (ctx == NULL)
        return BAD_FUNC_ARG;

    return wolfSSL_CertManagerLoadCRLBuffer(ctx->cm, buff, sz, type);
}


int wolfSSL_LoadCRLBuffer(WOLFSSL* ssl, const unsigned char* buff,
                          long sz, int type)
{
    WOLFSSL_ENTER("wolfSSL_LoadCRLBuffer");

    if (ssl == NULL || ssl->ctx == NULL)
        return BAD_FUNC_ARG;

    return wolfSSL_CertManagerLoadCRLBuffer(ssl->ctx->cm, buff, sz, type);
}


#endif /* HAVE_CRL */

/* turn on CRL if off and compiled in, set options */
int wolfSSL_CertManagerEnableCRL(WOLFSSL_CERT_MANAGER* cm, int options)
{
    int ret = WOLFSSL_SUCCESS;

    (void)options;

    WOLFSSL_ENTER("wolfSSL_CertManagerEnableCRL");
    if (cm == NULL)
        return BAD_FUNC_ARG;

    #ifdef HAVE_CRL
        if (cm->crl == NULL) {
            cm->crl = (WOLFSSL_CRL*)XMALLOC(sizeof(WOLFSSL_CRL), cm->heap,
                                            DYNAMIC_TYPE_CRL);
            if (cm->crl == NULL)
                return MEMORY_E;

            if (InitCRL(cm->crl, cm) != 0) {
                WOLFSSL_MSG("Init CRL failed");
                FreeCRL(cm->crl, 1);
                cm->crl = NULL;
                return WOLFSSL_FAILURE;
            }

        #if defined(HAVE_CRL_IO) && defined(USE_WOLFSSL_IO)
            cm->crl->crlIOCb = EmbedCrlLookup;
        #endif
        }

        cm->crlEnabled = 1;
        if (options & WOLFSSL_CRL_CHECKALL)
            cm->crlCheckAll = 1;
    #else
        ret = NOT_COMPILED_IN;
    #endif

    return ret;
}


int wolfSSL_CertManagerDisableCRL(WOLFSSL_CERT_MANAGER* cm)
{
    WOLFSSL_ENTER("wolfSSL_CertManagerDisableCRL");
    if (cm == NULL)
        return BAD_FUNC_ARG;

    cm->crlEnabled = 0;

    return WOLFSSL_SUCCESS;
}

#ifndef NO_WOLFSSL_CM_VERIFY
void wolfSSL_CertManagerSetVerify(WOLFSSL_CERT_MANAGER* cm, VerifyCallback vc)
{
    WOLFSSL_ENTER("wolfSSL_CertManagerSetVerify");
    if (cm == NULL)
        return;

    cm->verifyCallback = vc;
}
#endif /* NO_WOLFSSL_CM_VERIFY */

#if !defined(NO_WOLFSSL_CLIENT) || !defined(WOLFSSL_NO_CLIENT_AUTH)
/* Verify the certificate, WOLFSSL_SUCCESS for ok, < 0 for error */
int CM_VerifyBuffer_ex(WOLFSSL_CERT_MANAGER* cm, const byte* buff,
                                    long sz, int format, int err_val)
{
    int ret = 0;
    DerBuffer* der = NULL;
#ifdef WOLFSSL_SMALL_STACK
    DecodedCert* cert;
#else
    DecodedCert  cert[1];
#endif

    WOLFSSL_ENTER("wolfSSL_CertManagerVerifyBuffer");

#ifdef WOLFSSL_SMALL_STACK
    cert = (DecodedCert*)XMALLOC(sizeof(DecodedCert), cm->heap,
                                 DYNAMIC_TYPE_DCERT);
    if (cert == NULL)
        return MEMORY_E;
#endif

    if (format == WOLFSSL_FILETYPE_PEM) {
#ifdef WOLFSSL_PEM_TO_DER
        ret = PemToDer(buff, sz, CERT_TYPE, &der, cm->heap, NULL, NULL);
        if (ret != 0) {
            FreeDer(&der);
        #ifdef WOLFSSL_SMALL_STACK
            XFREE(cert, cm->heap, DYNAMIC_TYPE_DCERT);
        #endif
            return ret;
        }
        InitDecodedCert(cert, der->buffer, der->length, cm->heap);
#else
        ret = NOT_COMPILED_IN;
#endif
    }
    else {
        InitDecodedCert(cert, buff, (word32)sz, cm->heap);
    }

    if (ret == 0)
        ret = ParseCertRelative(cert, CERT_TYPE, 1, cm);

#if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
    /* ret needs to be self-singer error for Qt compat */
    if (ret == ASN_NO_SIGNER_E && cert->selfSigned)
        ret = ASN_SELF_SIGNED_E;
#endif

#ifdef HAVE_CRL
    if (ret == 0 && cm->crlEnabled)
        ret = CheckCertCRL(cm->crl, cert);
#endif

#ifndef NO_WOLFSSL_CM_VERIFY
    /* if verify callback has been set */
    if (cm->verifyCallback) {
        buffer certBuf;
    #ifdef WOLFSSL_SMALL_STACK
        ProcPeerCertArgs* args;
        args = (ProcPeerCertArgs*)XMALLOC(
            sizeof(ProcPeerCertArgs), cm->heap, DYNAMIC_TYPE_TMP_BUFFER);
        if (args == NULL) {
            XFREE(cert, cm->heap, DYNAMIC_TYPE_DCERT);
            return MEMORY_E;
        }
    #else
        ProcPeerCertArgs  args[1];
    #endif

        certBuf.buffer = (byte*)buff;
        certBuf.length = (unsigned int)sz;
        XMEMSET(args, 0, sizeof(ProcPeerCertArgs));

        args->totalCerts = 1;
        args->certs = &certBuf;
        args->dCert = cert;
        args->dCertInit = 1;

        if (err_val != 0) {
            ret = err_val;
        }
        ret = DoVerifyCallback(cm, NULL, ret, args);
    #ifdef WOLFSSL_SMALL_STACK
        XFREE(args, cm->heap, DYNAMIC_TYPE_TMP_BUFFER);
    #endif
    }
#else
    (void)err_val;
#endif

    FreeDecodedCert(cert);
    FreeDer(&der);
#ifdef WOLFSSL_SMALL_STACK
    XFREE(cert, cm->heap, DYNAMIC_TYPE_DCERT);
#endif

    return ret == 0 ? WOLFSSL_SUCCESS : ret;
}

/* Verify the certificate, WOLFSSL_SUCCESS for ok, < 0 for error */
int wolfSSL_CertManagerVerifyBuffer(WOLFSSL_CERT_MANAGER* cm, const byte* buff,
                                    long sz, int format)
{
    return CM_VerifyBuffer_ex(cm, buff, sz, format, 0);
}
#endif /* !NO_WOLFSSL_CLIENT || !WOLFSSL_NO_CLIENT_AUTH */

/* turn on OCSP if off and compiled in, set options */
int wolfSSL_CertManagerEnableOCSP(WOLFSSL_CERT_MANAGER* cm, int options)
{
    int ret = WOLFSSL_SUCCESS;

    (void)options;

    WOLFSSL_ENTER("wolfSSL_CertManagerEnableOCSP");
    if (cm == NULL)
        return BAD_FUNC_ARG;

    #ifdef HAVE_OCSP
        if (cm->ocsp == NULL) {
            cm->ocsp = (WOLFSSL_OCSP*)XMALLOC(sizeof(WOLFSSL_OCSP), cm->heap,
                                              DYNAMIC_TYPE_OCSP);
            if (cm->ocsp == NULL)
                return MEMORY_E;

            if (InitOCSP(cm->ocsp, cm) != 0) {
                WOLFSSL_MSG("Init OCSP failed");
                FreeOCSP(cm->ocsp, 1);
                cm->ocsp = NULL;
                return WOLFSSL_FAILURE;
            }
        }
        cm->ocspEnabled = 1;
        if (options & WOLFSSL_OCSP_URL_OVERRIDE)
            cm->ocspUseOverrideURL = 1;
        if (options & WOLFSSL_OCSP_NO_NONCE)
            cm->ocspSendNonce = 0;
        else
            cm->ocspSendNonce = 1;
        if (options & WOLFSSL_OCSP_CHECKALL)
            cm->ocspCheckAll = 1;
        #ifndef WOLFSSL_USER_IO
            cm->ocspIOCb = EmbedOcspLookup;
            cm->ocspRespFreeCb = EmbedOcspRespFree;
            cm->ocspIOCtx = cm->heap;
        #endif /* WOLFSSL_USER_IO */
    #else
        ret = NOT_COMPILED_IN;
    #endif

    return ret;
}


int wolfSSL_CertManagerDisableOCSP(WOLFSSL_CERT_MANAGER* cm)
{
    WOLFSSL_ENTER("wolfSSL_CertManagerDisableOCSP");
    if (cm == NULL)
        return BAD_FUNC_ARG;

    cm->ocspEnabled = 0;

    return WOLFSSL_SUCCESS;
}

/* turn on OCSP Stapling if off and compiled in, set options */
int wolfSSL_CertManagerEnableOCSPStapling(WOLFSSL_CERT_MANAGER* cm)
{
    int ret = WOLFSSL_SUCCESS;

    WOLFSSL_ENTER("wolfSSL_CertManagerEnableOCSPStapling");

    if (cm == NULL)
        return BAD_FUNC_ARG;

#if defined(HAVE_CERTIFICATE_STATUS_REQUEST) \
 || defined(HAVE_CERTIFICATE_STATUS_REQUEST_V2)
    #ifndef NO_WOLFSSL_SERVER
    if (cm->ocsp_stapling == NULL) {
        cm->ocsp_stapling = (WOLFSSL_OCSP*)XMALLOC(sizeof(WOLFSSL_OCSP),
                                               cm->heap, DYNAMIC_TYPE_OCSP);
        if (cm->ocsp_stapling == NULL)
            return MEMORY_E;

        if (InitOCSP(cm->ocsp_stapling, cm) != 0) {
            WOLFSSL_MSG("Init OCSP failed");
            FreeOCSP(cm->ocsp_stapling, 1);
            cm->ocsp_stapling = NULL;
            return WOLFSSL_FAILURE;
        }
    }

    #ifndef WOLFSSL_USER_IO
        cm->ocspIOCb = EmbedOcspLookup;
        cm->ocspRespFreeCb = EmbedOcspRespFree;
        cm->ocspIOCtx = cm->heap;
    #endif /* WOLFSSL_USER_IO */
    #endif /* NO_WOLFSSL_SERVER */
    cm->ocspStaplingEnabled = 1;
#else
    ret = NOT_COMPILED_IN;
#endif

    return ret;
}

int wolfSSL_CertManagerDisableOCSPStapling(WOLFSSL_CERT_MANAGER* cm)
{
    int ret = WOLFSSL_SUCCESS;

    WOLFSSL_ENTER("wolfSSL_CertManagerDisableOCSPStapling");

    if (cm == NULL)
        return BAD_FUNC_ARG;

#if defined(HAVE_CERTIFICATE_STATUS_REQUEST) \
 || defined(HAVE_CERTIFICATE_STATUS_REQUEST_V2)
    cm->ocspStaplingEnabled = 0;
#else
    ret = NOT_COMPILED_IN;
#endif
    return ret;
}

/* require OCSP stapling response */
int wolfSSL_CertManagerEnableOCSPMustStaple(WOLFSSL_CERT_MANAGER* cm)
{
    int ret;

    WOLFSSL_ENTER("wolfSSL_CertManagerEnableOCSPMustStaple");

    if (cm == NULL)
        return BAD_FUNC_ARG;

#if defined(HAVE_CERTIFICATE_STATUS_REQUEST) \
 || defined(HAVE_CERTIFICATE_STATUS_REQUEST_V2)
    #ifndef NO_WOLFSSL_CLIENT
        cm->ocspMustStaple = 1;
    #endif
    ret = WOLFSSL_SUCCESS;
#else
    ret = NOT_COMPILED_IN;
#endif

    return ret;
}

int wolfSSL_CertManagerDisableOCSPMustStaple(WOLFSSL_CERT_MANAGER* cm)
{
    int ret;

    WOLFSSL_ENTER("wolfSSL_CertManagerDisableOCSPMustStaple");

    if (cm == NULL)
        return BAD_FUNC_ARG;

#if defined(HAVE_CERTIFICATE_STATUS_REQUEST) \
 || defined(HAVE_CERTIFICATE_STATUS_REQUEST_V2)
    #ifndef NO_WOLFSSL_CLIENT
        cm->ocspMustStaple = 0;
    #endif
    ret = WOLFSSL_SUCCESS;
#else
    ret = NOT_COMPILED_IN;
#endif
    return ret;
}

#ifdef HAVE_OCSP
/* check CRL if enabled, WOLFSSL_SUCCESS  */
int wolfSSL_CertManagerCheckOCSP(WOLFSSL_CERT_MANAGER* cm, byte* der, int sz)
{
    int ret;
#ifdef WOLFSSL_SMALL_STACK
    DecodedCert* cert = NULL;
#else
    DecodedCert  cert[1];
#endif

    WOLFSSL_ENTER("wolfSSL_CertManagerCheckOCSP");

    if (cm == NULL)
        return BAD_FUNC_ARG;

    if (cm->ocspEnabled == 0)
        return WOLFSSL_SUCCESS;

#ifdef WOLFSSL_SMALL_STACK
    cert = (DecodedCert*)XMALLOC(sizeof(DecodedCert), cm->heap, DYNAMIC_TYPE_DCERT);
    if (cert == NULL)
        return MEMORY_E;
#endif

    InitDecodedCert(cert, der, sz, NULL);

    if ((ret = ParseCertRelative(cert, CERT_TYPE, VERIFY_OCSP, cm)) != 0) {
        WOLFSSL_MSG("ParseCert failed");
    }
    else if ((ret = CheckCertOCSP(cm->ocsp, cert, NULL)) != 0) {
        WOLFSSL_MSG("CheckCertOCSP failed");
    }

    FreeDecodedCert(cert);
#ifdef WOLFSSL_SMALL_STACK
    XFREE(cert, cm->heap, DYNAMIC_TYPE_DCERT);
#endif

    return ret == 0 ? WOLFSSL_SUCCESS : ret;
}

WOLFSSL_API int wolfSSL_CertManagerCheckOCSPResponse(WOLFSSL_CERT_MANAGER *cm,
                                                    byte *response, int responseSz, buffer *responseBuffer,
                                                    CertStatus *status, OcspEntry *entry, OcspRequest *ocspRequest)
{
    int ret;

    WOLFSSL_ENTER("wolfSSL_CertManagerCheckOCSPResponse");
    if (cm == NULL || response == NULL)
        return BAD_FUNC_ARG;
    if (cm->ocspEnabled == 0)
        return WOLFSSL_SUCCESS;

    ret = CheckOcspResponse(cm->ocsp, response, responseSz, responseBuffer, status,
                        entry, ocspRequest);

    return ret == 0 ? WOLFSSL_SUCCESS : ret;
}

int wolfSSL_CertManagerSetOCSPOverrideURL(WOLFSSL_CERT_MANAGER* cm,
                                          const char* url)
{
    WOLFSSL_ENTER("wolfSSL_CertManagerSetOCSPOverrideURL");
    if (cm == NULL)
        return BAD_FUNC_ARG;

    XFREE(cm->ocspOverrideURL, cm->heap, DYNAMIC_TYPE_URL);
    if (url != NULL) {
        int urlSz = (int)XSTRLEN(url) + 1;
        cm->ocspOverrideURL = (char*)XMALLOC(urlSz, cm->heap, DYNAMIC_TYPE_URL);
        if (cm->ocspOverrideURL != NULL) {
            XMEMCPY(cm->ocspOverrideURL, url, urlSz);
        }
        else
            return MEMORY_E;
    }
    else
        cm->ocspOverrideURL = NULL;

    return WOLFSSL_SUCCESS;
}


int wolfSSL_CertManagerSetOCSP_Cb(WOLFSSL_CERT_MANAGER* cm,
                        CbOCSPIO ioCb, CbOCSPRespFree respFreeCb, void* ioCbCtx)
{
    WOLFSSL_ENTER("wolfSSL_CertManagerSetOCSP_Cb");
    if (cm == NULL)
        return BAD_FUNC_ARG;

    cm->ocspIOCb = ioCb;
    cm->ocspRespFreeCb = respFreeCb;
    cm->ocspIOCtx = ioCbCtx;

    return WOLFSSL_SUCCESS;
}


int wolfSSL_EnableOCSP(WOLFSSL* ssl, int options)
{
    WOLFSSL_ENTER("wolfSSL_EnableOCSP");
    if (ssl)
        return wolfSSL_CertManagerEnableOCSP(ssl->ctx->cm, options);
    else
        return BAD_FUNC_ARG;
}

int wolfSSL_DisableOCSP(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_DisableOCSP");
    if (ssl)
        return wolfSSL_CertManagerDisableOCSP(ssl->ctx->cm);
    else
        return BAD_FUNC_ARG;
}


int wolfSSL_EnableOCSPStapling(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_EnableOCSPStapling");
    if (ssl)
        return wolfSSL_CertManagerEnableOCSPStapling(ssl->ctx->cm);
    else
        return BAD_FUNC_ARG;
}

int wolfSSL_DisableOCSPStapling(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_DisableOCSPStapling");
    if (ssl)
        return wolfSSL_CertManagerDisableOCSPStapling(ssl->ctx->cm);
    else
        return BAD_FUNC_ARG;
}

int wolfSSL_SetOCSP_OverrideURL(WOLFSSL* ssl, const char* url)
{
    WOLFSSL_ENTER("wolfSSL_SetOCSP_OverrideURL");
    if (ssl)
        return wolfSSL_CertManagerSetOCSPOverrideURL(ssl->ctx->cm, url);
    else
        return BAD_FUNC_ARG;
}


int wolfSSL_SetOCSP_Cb(WOLFSSL* ssl,
                        CbOCSPIO ioCb, CbOCSPRespFree respFreeCb, void* ioCbCtx)
{
    WOLFSSL_ENTER("wolfSSL_SetOCSP_Cb");
    if (ssl) {
        ssl->ocspIOCtx = ioCbCtx; /* use SSL specific ioCbCtx */
        return wolfSSL_CertManagerSetOCSP_Cb(ssl->ctx->cm,
                                             ioCb, respFreeCb, NULL);
    }
    else
        return BAD_FUNC_ARG;
}


int wolfSSL_CTX_EnableOCSP(WOLFSSL_CTX* ctx, int options)
{
    WOLFSSL_ENTER("wolfSSL_CTX_EnableOCSP");
    if (ctx)
        return wolfSSL_CertManagerEnableOCSP(ctx->cm, options);
    else
        return BAD_FUNC_ARG;
}


int wolfSSL_CTX_DisableOCSP(WOLFSSL_CTX* ctx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_DisableOCSP");
    if (ctx)
        return wolfSSL_CertManagerDisableOCSP(ctx->cm);
    else
        return BAD_FUNC_ARG;
}


int wolfSSL_CTX_SetOCSP_OverrideURL(WOLFSSL_CTX* ctx, const char* url)
{
    WOLFSSL_ENTER("wolfSSL_SetOCSP_OverrideURL");
    if (ctx)
        return wolfSSL_CertManagerSetOCSPOverrideURL(ctx->cm, url);
    else
        return BAD_FUNC_ARG;
}


int wolfSSL_CTX_SetOCSP_Cb(WOLFSSL_CTX* ctx, CbOCSPIO ioCb,
                           CbOCSPRespFree respFreeCb, void* ioCbCtx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_SetOCSP_Cb");
    if (ctx)
        return wolfSSL_CertManagerSetOCSP_Cb(ctx->cm, ioCb,
                                             respFreeCb, ioCbCtx);
    else
        return BAD_FUNC_ARG;
}

#if defined(HAVE_CERTIFICATE_STATUS_REQUEST) \
 || defined(HAVE_CERTIFICATE_STATUS_REQUEST_V2)
int wolfSSL_CTX_EnableOCSPStapling(WOLFSSL_CTX* ctx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_EnableOCSPStapling");
    if (ctx)
        return wolfSSL_CertManagerEnableOCSPStapling(ctx->cm);
    else
        return BAD_FUNC_ARG;
}

int wolfSSL_CTX_DisableOCSPStapling(WOLFSSL_CTX* ctx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_DisableOCSPStapling");
    if (ctx)
        return wolfSSL_CertManagerDisableOCSPStapling(ctx->cm);
    else
        return BAD_FUNC_ARG;
}

int wolfSSL_CTX_EnableOCSPMustStaple(WOLFSSL_CTX* ctx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_EnableOCSPMustStaple");
    if (ctx)
        return wolfSSL_CertManagerEnableOCSPMustStaple(ctx->cm);
    else
        return BAD_FUNC_ARG;
}

int wolfSSL_CTX_DisableOCSPMustStaple(WOLFSSL_CTX* ctx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_DisableOCSPMustStaple");
    if (ctx)
        return wolfSSL_CertManagerDisableOCSPMustStaple(ctx->cm);
    else
        return BAD_FUNC_ARG;
}
#endif /* HAVE_CERTIFICATE_STATUS_REQUEST || HAVE_CERTIFICATE_STATUS_REQUEST_V2 */

#endif /* HAVE_OCSP */

/* macro to get verify settings for AddCA */
#define GET_VERIFY_SETTING_CTX(ctx) \
    (ctx && ctx->verifyNone ? NO_VERIFY : VERIFY)
#define GET_VERIFY_SETTING_SSL(ssl) \
    (ssl && ssl->options.verifyNone ? NO_VERIFY : VERIFY)

#ifndef NO_FILESYSTEM

/* process a file with name fname into ctx of format and type
   userChain specifies a user certificate chain to pass during handshake */
int ProcessFile(WOLFSSL_CTX* ctx, const char* fname, int format, int type,
                WOLFSSL* ssl, int userChain, WOLFSSL_CRL* crl, int verify)
{
#ifdef WOLFSSL_SMALL_STACK
    byte   staticBuffer[1]; /* force heap usage */
#else
    byte   staticBuffer[FILE_BUFFER_SIZE];
#endif
    byte*  myBuffer = staticBuffer;
    int    dynamic = 0;
    int    ret;
    long   sz = 0;
    XFILE  file;
    void*  heapHint = wolfSSL_CTX_GetHeap(ctx, ssl);
#ifndef NO_CODING
    const char* header = NULL;
    const char* footer = NULL;
#endif

    (void)crl;
    (void)heapHint;

    if (fname == NULL) return WOLFSSL_BAD_FILE;

    file = XFOPEN(fname, "rb");
    if (file == XBADFILE) return WOLFSSL_BAD_FILE;
    if (XFSEEK(file, 0, XSEEK_END) != 0) {
        XFCLOSE(file);
        return WOLFSSL_BAD_FILE;
    }
    sz = XFTELL(file);
    XREWIND(file);

    if (sz > MAX_WOLFSSL_FILE_SIZE || sz <= 0) {
        WOLFSSL_MSG("ProcessFile file size error");
        XFCLOSE(file);
        return WOLFSSL_BAD_FILE;
    }

    if (sz > (long)sizeof(staticBuffer)) {
        WOLFSSL_MSG("Getting dynamic buffer");
        myBuffer = (byte*)XMALLOC(sz, heapHint, DYNAMIC_TYPE_FILE);
        if (myBuffer == NULL) {
            XFCLOSE(file);
            return WOLFSSL_BAD_FILE;
        }
        dynamic = 1;
    }

    if ((size_t)XFREAD(myBuffer, 1, sz, file) != (size_t)sz)
        ret = WOLFSSL_BAD_FILE;
    else {
        /* Try to detect type by parsing cert header and footer */
        if (type == DETECT_CERT_TYPE) {
#ifndef NO_CODING
            if (wc_PemGetHeaderFooter(CA_TYPE, &header, &footer) == 0 &&
               (XSTRNSTR((char*)myBuffer, header, (int)sz) != NULL)) {
                type = CA_TYPE;
            }
#ifdef HAVE_CRL
            else if (wc_PemGetHeaderFooter(CRL_TYPE, &header, &footer) == 0 &&
                    (XSTRNSTR((char*)myBuffer, header, (int)sz) != NULL)) {
                type = CRL_TYPE;
            }
#endif
            else if (wc_PemGetHeaderFooter(CERT_TYPE, &header, &footer) == 0 &&
                    (XSTRNSTR((char*)myBuffer, header, (int)sz) != NULL)) {
                type = CERT_TYPE;
            }
            else
#endif
            {
                WOLFSSL_MSG("Failed to detect certificate type");
                if (dynamic)
                    XFREE(myBuffer, heapHint, DYNAMIC_TYPE_FILE);
                XFCLOSE(file);
                return WOLFSSL_BAD_CERTTYPE;
            }
        }
        if ((type == CA_TYPE || type == TRUSTED_PEER_TYPE)
                                          && format == WOLFSSL_FILETYPE_PEM) {
            ret = ProcessChainBuffer(ctx, myBuffer, sz, format, type, ssl,
                                     verify);
        }
#ifdef HAVE_CRL
        else if (type == CRL_TYPE)
            ret = BufferLoadCRL(crl, myBuffer, sz, format, verify);
#endif
        else
            ret = ProcessBuffer(ctx, myBuffer, sz, format, type, ssl, NULL,
                                userChain, verify);
    }

    XFCLOSE(file);
    if (dynamic)
        XFREE(myBuffer, heapHint, DYNAMIC_TYPE_FILE);

    return ret;
}

/* loads file then loads each file in path, no c_rehash */
int wolfSSL_CTX_load_verify_locations_ex(WOLFSSL_CTX* ctx, const char* file,
                                     const char* path, word32 flags)
{
    int ret = WOLFSSL_SUCCESS;
#ifndef NO_WOLFSSL_DIR
    int fileRet;
    int successCount = 0;
    int failCount = 0;
#endif
    int verify;

    WOLFSSL_MSG("wolfSSL_CTX_load_verify_locations_ex");

    if (ctx == NULL || (file == NULL && path == NULL)) {
        return WOLFSSL_FAILURE;
    }

    verify = GET_VERIFY_SETTING_CTX(ctx);
    if (flags & WOLFSSL_LOAD_FLAG_DATE_ERR_OKAY)
        verify = VERIFY_SKIP_DATE;

    if (file) {
        ret = ProcessFile(ctx, file, WOLFSSL_FILETYPE_PEM, CA_TYPE, NULL, 0,
                          NULL, verify);
#ifndef NO_WOLFSSL_DIR
        if (ret == WOLFSSL_SUCCESS)
            successCount++;
#endif
    }

    if (ret == WOLFSSL_SUCCESS && path) {
#ifndef NO_WOLFSSL_DIR
        char* name = NULL;
    #ifdef WOLFSSL_SMALL_STACK
        ReadDirCtx* readCtx;
        readCtx = (ReadDirCtx*)XMALLOC(sizeof(ReadDirCtx), ctx->heap,
                                                       DYNAMIC_TYPE_DIRCTX);
        if (readCtx == NULL)
            return MEMORY_E;
    #else
        ReadDirCtx readCtx[1];
    #endif

        /* try to load each regular file in path */
        fileRet = wc_ReadDirFirst(readCtx, path, &name);
        while (fileRet == 0 && name) {
            WOLFSSL_MSG(name); /* log file name */
            ret = ProcessFile(ctx, name, WOLFSSL_FILETYPE_PEM, CA_TYPE,
                              NULL, 0, NULL, verify);
            if (ret != WOLFSSL_SUCCESS) {
                /* handle flags for ignoring errors, skipping expired certs or
                   by PEM certificate header error */
                if ( (flags & WOLFSSL_LOAD_FLAG_IGNORE_ERR) ||
                    ((flags & WOLFSSL_LOAD_FLAG_PEM_CA_ONLY) &&
                       (ret == ASN_NO_PEM_HEADER))) {
                    /* Do not fail here if a certificate fails to load,
                       continue to next file */
                    ret = WOLFSSL_SUCCESS;
                }
                else {
                    WOLFSSL_ERROR(ret);
                    WOLFSSL_MSG("Load CA file failed, continuing");
                    failCount++;
                }
            }
            else {
                successCount++;
            }
            fileRet = wc_ReadDirNext(readCtx, path, &name);
        }
        wc_ReadDirClose(readCtx);

        /* pass directory read failure to response code */
        if (fileRet != WC_READDIR_NOFILE) {
            ret = fileRet;
    #if defined(WOLFSSL_QT)
            if (ret == BAD_PATH_ERROR && 
                flags & WOLFSSL_LOAD_FLAG_IGNORE_BAD_PATH_ERR) {
               /* QSslSocket always loads certs in system folder 
                * when it is initialized.
                * Compliant with OpenSSL when flag sets.
                */
                ret = WOLFSSL_SUCCESS;
            }
            else {
                /* qssl socket wants to know errors. */
                WOLFSSL_ERROR(ret);
            }
    #endif
        }
        /* report failure if no files were loaded or there were failures */
        else if (successCount == 0 || failCount > 0) {
            /* use existing error code if exists */
    #if defined(WOLFSSL_QT)
            /* compliant with OpenSSL when flag sets*/
            if (!(flags & WOLFSSL_LOAD_FLAG_IGNORE_ZEROFILE)) {
    #endif
            if (ret == WOLFSSL_SUCCESS)
                ret = WOLFSSL_FAILURE;
    #if defined(WOLFSSL_QT)
            }
    #endif
        }
        else {
            ret = WOLFSSL_SUCCESS;
        }

    #ifdef WOLFSSL_SMALL_STACK
        XFREE(readCtx, ctx->heap, DYNAMIC_TYPE_DIRCTX);
    #endif
#else
        ret = NOT_COMPILED_IN;
        (void)flags;
#endif
    }

    return ret;
}

WOLFSSL_ABI
int wolfSSL_CTX_load_verify_locations(WOLFSSL_CTX* ctx, const char* file,
                                     const char* path)
{
    int ret = wolfSSL_CTX_load_verify_locations_ex(ctx, file, path,
        WOLFSSL_LOAD_VERIFY_DEFAULT_FLAGS);

    return WS_RETURN_CODE(ret,WOLFSSL_FAILURE);
}


#ifdef WOLFSSL_TRUST_PEER_CERT
/* Used to specify a peer cert to match when connecting
    ctx : the ctx structure to load in peer cert
    file: the string name of cert file
    type: type of format such as PEM/DER
 */
int wolfSSL_CTX_trust_peer_cert(WOLFSSL_CTX* ctx, const char* file, int type)
{
    WOLFSSL_ENTER("wolfSSL_CTX_trust_peer_cert");

    if (ctx == NULL || file == NULL) {
        return WOLFSSL_FAILURE;
    }

    return ProcessFile(ctx, file, type, TRUSTED_PEER_TYPE, NULL, 0, NULL,
                       GET_VERIFY_SETTING_CTX(ctx));
}
#endif /* WOLFSSL_TRUST_PEER_CERT */


#if !defined(NO_WOLFSSL_CLIENT) || !defined(WOLFSSL_NO_CLIENT_AUTH)
/* Verify the certificate, WOLFSSL_SUCCESS for ok, < 0 for error */
int wolfSSL_CertManagerVerify(WOLFSSL_CERT_MANAGER* cm, const char* fname,
                             int format)
{
    int    ret = WOLFSSL_FATAL_ERROR;
#ifdef WOLFSSL_SMALL_STACK
    byte   staticBuffer[1]; /* force heap usage */
#else
    byte   staticBuffer[FILE_BUFFER_SIZE];
#endif
    byte*  myBuffer = staticBuffer;
    int    dynamic = 0;
    long   sz = 0;
    XFILE  file = XFOPEN(fname, "rb");

    WOLFSSL_ENTER("wolfSSL_CertManagerVerify");

    if (file == XBADFILE) return WOLFSSL_BAD_FILE;
    if(XFSEEK(file, 0, XSEEK_END) != 0) {
        XFCLOSE(file);
        return WOLFSSL_BAD_FILE;
    }
    sz = XFTELL(file);
    XREWIND(file);

    if (sz > MAX_WOLFSSL_FILE_SIZE || sz <= 0) {
        WOLFSSL_MSG("CertManagerVerify file size error");
        XFCLOSE(file);
        return WOLFSSL_BAD_FILE;
    }

    if (sz > (long)sizeof(staticBuffer)) {
        WOLFSSL_MSG("Getting dynamic buffer");
        myBuffer = (byte*) XMALLOC(sz, cm->heap, DYNAMIC_TYPE_FILE);
        if (myBuffer == NULL) {
            XFCLOSE(file);
            return WOLFSSL_BAD_FILE;
        }
        dynamic = 1;
    }

    if ((size_t)XFREAD(myBuffer, 1, sz, file) != (size_t)sz)
        ret = WOLFSSL_BAD_FILE;
    else
        ret = wolfSSL_CertManagerVerifyBuffer(cm, myBuffer, sz, format);

    XFCLOSE(file);
    if (dynamic)
        XFREE(myBuffer, cm->heap, DYNAMIC_TYPE_FILE);

    return ret;
}
#endif

/* like load verify locations, 1 for success, < 0 for error */
int wolfSSL_CertManagerLoadCA(WOLFSSL_CERT_MANAGER* cm, const char* file,
                             const char* path)
{
    int ret = WOLFSSL_FATAL_ERROR;
    WOLFSSL_CTX* tmp;

    WOLFSSL_ENTER("wolfSSL_CertManagerLoadCA");

    if (cm == NULL) {
        WOLFSSL_MSG("No CertManager error");
        return ret;
    }
    tmp = wolfSSL_CTX_new(cm_pick_method());

    if (tmp == NULL) {
        WOLFSSL_MSG("CTX new failed");
        return ret;
    }

    /* for tmp use */
    wolfSSL_CertManagerFree(tmp->cm);
    tmp->cm = cm;

    ret = wolfSSL_CTX_load_verify_locations(tmp, file, path);

    /* don't lose our good one */
    tmp->cm = NULL;
    wolfSSL_CTX_free(tmp);

    return ret;
}


#endif /* NO_FILESYSTEM */

#ifdef HAVE_CRL

/* check CRL if enabled, WOLFSSL_SUCCESS  */
int wolfSSL_CertManagerCheckCRL(WOLFSSL_CERT_MANAGER* cm, byte* der, int sz)
{
    int ret = 0;
#ifdef WOLFSSL_SMALL_STACK
    DecodedCert* cert = NULL;
#else
    DecodedCert  cert[1];
#endif

    WOLFSSL_ENTER("wolfSSL_CertManagerCheckCRL");

    if (cm == NULL)
        return BAD_FUNC_ARG;

    if (cm->crlEnabled == 0)
        return WOLFSSL_SUCCESS;

#ifdef WOLFSSL_SMALL_STACK
    cert = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL, DYNAMIC_TYPE_DCERT);
    if (cert == NULL)
        return MEMORY_E;
#endif

    InitDecodedCert(cert, der, sz, NULL);

    if ((ret = ParseCertRelative(cert, CERT_TYPE, VERIFY_CRL, cm)) != 0) {
        WOLFSSL_MSG("ParseCert failed");
    }
    else if ((ret = CheckCertCRL(cm->crl, cert)) != 0) {
        WOLFSSL_MSG("CheckCertCRL failed");
    }

    FreeDecodedCert(cert);
#ifdef WOLFSSL_SMALL_STACK
    XFREE(cert, NULL, DYNAMIC_TYPE_DCERT);
#endif

    return ret == 0 ? WOLFSSL_SUCCESS : ret;
}


int wolfSSL_CertManagerSetCRL_Cb(WOLFSSL_CERT_MANAGER* cm, CbMissingCRL cb)
{
    WOLFSSL_ENTER("wolfSSL_CertManagerSetCRL_Cb");
    if (cm == NULL)
        return BAD_FUNC_ARG;

    cm->cbMissingCRL = cb;

    return WOLFSSL_SUCCESS;
}

#ifdef HAVE_CRL_IO
int wolfSSL_CertManagerSetCRL_IOCb(WOLFSSL_CERT_MANAGER* cm, CbCrlIO cb)
{
    if (cm == NULL)
        return BAD_FUNC_ARG;

    cm->crl->crlIOCb = cb;

    return WOLFSSL_SUCCESS;
}
#endif

#ifndef NO_FILESYSTEM
int wolfSSL_CertManagerLoadCRL(WOLFSSL_CERT_MANAGER* cm, const char* path,
                              int type, int monitor)
{
    WOLFSSL_ENTER("wolfSSL_CertManagerLoadCRL");
    if (cm == NULL)
        return BAD_FUNC_ARG;

    if (cm->crl == NULL) {
        if (wolfSSL_CertManagerEnableCRL(cm, 0) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Enable CRL failed");
            return WOLFSSL_FATAL_ERROR;
        }
    }

    return LoadCRL(cm->crl, path, type, monitor);
}
#endif

int wolfSSL_EnableCRL(WOLFSSL* ssl, int options)
{
    WOLFSSL_ENTER("wolfSSL_EnableCRL");
    if (ssl)
        return wolfSSL_CertManagerEnableCRL(ssl->ctx->cm, options);
    else
        return BAD_FUNC_ARG;
}


int wolfSSL_DisableCRL(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_DisableCRL");
    if (ssl)
        return wolfSSL_CertManagerDisableCRL(ssl->ctx->cm);
    else
        return BAD_FUNC_ARG;
}

#ifndef NO_FILESYSTEM
int wolfSSL_LoadCRL(WOLFSSL* ssl, const char* path, int type, int monitor)
{
    WOLFSSL_ENTER("wolfSSL_LoadCRL");
    if (ssl)
        return wolfSSL_CertManagerLoadCRL(ssl->ctx->cm, path, type, monitor);
    else
        return BAD_FUNC_ARG;
}
#endif


int wolfSSL_SetCRL_Cb(WOLFSSL* ssl, CbMissingCRL cb)
{
    WOLFSSL_ENTER("wolfSSL_SetCRL_Cb");
    if (ssl)
        return wolfSSL_CertManagerSetCRL_Cb(ssl->ctx->cm, cb);
    else
        return BAD_FUNC_ARG;
}

#ifdef HAVE_CRL_IO
int wolfSSL_SetCRL_IOCb(WOLFSSL* ssl, CbCrlIO cb)
{
    WOLFSSL_ENTER("wolfSSL_SetCRL_Cb");
    if (ssl)
        return wolfSSL_CertManagerSetCRL_IOCb(ssl->ctx->cm, cb);
    else
        return BAD_FUNC_ARG;
}
#endif

int wolfSSL_CTX_EnableCRL(WOLFSSL_CTX* ctx, int options)
{
    WOLFSSL_ENTER("wolfSSL_CTX_EnableCRL");
    if (ctx)
        return wolfSSL_CertManagerEnableCRL(ctx->cm, options);
    else
        return BAD_FUNC_ARG;
}


int wolfSSL_CTX_DisableCRL(WOLFSSL_CTX* ctx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_DisableCRL");
    if (ctx)
        return wolfSSL_CertManagerDisableCRL(ctx->cm);
    else
        return BAD_FUNC_ARG;
}


#ifndef NO_FILESYSTEM
int wolfSSL_CTX_LoadCRL(WOLFSSL_CTX* ctx, const char* path,
                        int type, int monitor)
{
    WOLFSSL_ENTER("wolfSSL_CTX_LoadCRL");
    if (ctx)
        return wolfSSL_CertManagerLoadCRL(ctx->cm, path, type, monitor);
    else
        return BAD_FUNC_ARG;
}
#endif


int wolfSSL_CTX_SetCRL_Cb(WOLFSSL_CTX* ctx, CbMissingCRL cb)
{
    WOLFSSL_ENTER("wolfSSL_CTX_SetCRL_Cb");
    if (ctx)
        return wolfSSL_CertManagerSetCRL_Cb(ctx->cm, cb);
    else
        return BAD_FUNC_ARG;
}

#ifdef HAVE_CRL_IO
int wolfSSL_CTX_SetCRL_IOCb(WOLFSSL_CTX* ctx, CbCrlIO cb)
{
    WOLFSSL_ENTER("wolfSSL_CTX_SetCRL_IOCb");
    if (ctx)
        return wolfSSL_CertManagerSetCRL_IOCb(ctx->cm, cb);
    else
        return BAD_FUNC_ARG;
}
#endif


#endif /* HAVE_CRL */


#ifndef NO_FILESYSTEM


#ifdef WOLFSSL_DER_LOAD

/* Add format parameter to allow DER load of CA files */
int wolfSSL_CTX_der_load_verify_locations(WOLFSSL_CTX* ctx, const char* file,
                                          int format)
{
    WOLFSSL_ENTER("wolfSSL_CTX_der_load_verify_locations");
    if (ctx == NULL || file == NULL)
        return WOLFSSL_FAILURE;

    if (ProcessFile(ctx, file, format, CA_TYPE, NULL, 0, NULL,
                    GET_VERIFY_SETTING_CTX(ctx)) == WOLFSSL_SUCCESS) {
        return WOLFSSL_SUCCESS;
    }

    return WOLFSSL_FAILURE;
}

#endif /* WOLFSSL_DER_LOAD */



WOLFSSL_ABI
int wolfSSL_CTX_use_certificate_file(WOLFSSL_CTX* ctx, const char* file,
                                     int format)
{
    WOLFSSL_ENTER("wolfSSL_CTX_use_certificate_file");

    if (ProcessFile(ctx, file, format, CERT_TYPE, NULL, 0, NULL,
                    GET_VERIFY_SETTING_CTX(ctx)) == WOLFSSL_SUCCESS) {
        return WOLFSSL_SUCCESS;
    }

    return WOLFSSL_FAILURE;
}


WOLFSSL_ABI
int wolfSSL_CTX_use_PrivateKey_file(WOLFSSL_CTX* ctx, const char* file,
                                    int format)
{
    WOLFSSL_ENTER("wolfSSL_CTX_use_PrivateKey_file");

    if (ProcessFile(ctx, file, format, PRIVATEKEY_TYPE, NULL, 0, NULL,
                    GET_VERIFY_SETTING_CTX(ctx)) == WOLFSSL_SUCCESS) {
        return WOLFSSL_SUCCESS;
    }

    return WOLFSSL_FAILURE;
}


#endif /* NO_FILESYSTEM */


/* Sets the max chain depth when verifying a certificate chain. Default depth
 * is set to MAX_CHAIN_DEPTH.
 *
 * ctx   WOLFSSL_CTX structure to set depth in
 * depth max depth
 */
void wolfSSL_CTX_set_verify_depth(WOLFSSL_CTX *ctx, int depth) {
    WOLFSSL_ENTER("wolfSSL_CTX_set_verify_depth");

    if (ctx == NULL || depth < 0 || depth > MAX_CHAIN_DEPTH) {
        WOLFSSL_MSG("Bad depth argument, too large or less than 0");
        return;
    }

    ctx->verifyDepth = (byte)depth;
}


/* get cert chaining depth using ssl struct */
long wolfSSL_get_verify_depth(WOLFSSL* ssl)
{
    if(ssl == NULL) {
        return BAD_FUNC_ARG;
    }
#ifndef OPENSSL_EXTRA
    return MAX_CHAIN_DEPTH;
#else
    return ssl->options.verifyDepth;
#endif
}


/* get cert chaining depth using ctx struct */
long wolfSSL_CTX_get_verify_depth(WOLFSSL_CTX* ctx)
{
    if (ctx == NULL) {
        return BAD_FUNC_ARG;
    }
#ifndef OPENSSL_EXTRA
    return MAX_CHAIN_DEPTH;
#else
    return ctx->verifyDepth;
#endif
}


#ifndef NO_FILESYSTEM


WOLFSSL_ABI
int wolfSSL_CTX_use_certificate_chain_file(WOLFSSL_CTX* ctx, const char* file)
{
    /* process up to MAX_CHAIN_DEPTH plus subject cert */
    WOLFSSL_ENTER("wolfSSL_CTX_use_certificate_chain_file");

    if (ProcessFile(ctx, file, WOLFSSL_FILETYPE_PEM, CERT_TYPE, NULL, 1, NULL,
                    GET_VERIFY_SETTING_CTX(ctx)) == WOLFSSL_SUCCESS) {
        return WOLFSSL_SUCCESS;
    }

   return WOLFSSL_FAILURE;
}


int wolfSSL_CTX_use_certificate_chain_file_format(WOLFSSL_CTX* ctx,
                                                  const char* file, int format)
{
    /* process up to MAX_CHAIN_DEPTH plus subject cert */
    WOLFSSL_ENTER("wolfSSL_CTX_use_certificate_chain_file_format");

    if (ProcessFile(ctx, file, format, CERT_TYPE, NULL, 1, NULL,
                    GET_VERIFY_SETTING_CTX(ctx)) == WOLFSSL_SUCCESS) {
        return WOLFSSL_SUCCESS;
    }

   return WOLFSSL_FAILURE;
}


#ifndef NO_DH

/* server Diffie-Hellman parameters */
static int wolfSSL_SetTmpDH_file_wrapper(WOLFSSL_CTX* ctx, WOLFSSL* ssl,
                                        const char* fname, int format)
{
#ifdef WOLFSSL_SMALL_STACK
    byte   staticBuffer[1]; /* force heap usage */
#else
    byte   staticBuffer[FILE_BUFFER_SIZE];
#endif
    byte*  myBuffer = staticBuffer;
    int    dynamic = 0;
    int    ret;
    long   sz = 0;
    XFILE  file;

    if (ctx == NULL || fname == NULL)
        return BAD_FUNC_ARG;

    file = XFOPEN(fname, "rb");
    if (file == XBADFILE) return WOLFSSL_BAD_FILE;
    if(XFSEEK(file, 0, XSEEK_END) != 0) {
        XFCLOSE(file);
        return WOLFSSL_BAD_FILE;
    }
    sz = XFTELL(file);
    XREWIND(file);

    if (sz > MAX_WOLFSSL_FILE_SIZE || sz <= 0) {
        WOLFSSL_MSG("SetTmpDH file size error");
        XFCLOSE(file);
        return WOLFSSL_BAD_FILE;
    }

    if (sz > (long)sizeof(staticBuffer)) {
        WOLFSSL_MSG("Getting dynamic buffer");
        myBuffer = (byte*) XMALLOC(sz, ctx->heap, DYNAMIC_TYPE_FILE);
        if (myBuffer == NULL) {
            XFCLOSE(file);
            return WOLFSSL_BAD_FILE;
        }
        dynamic = 1;
    }

    if ((size_t)XFREAD(myBuffer, 1, sz, file) != (size_t)sz)
        ret = WOLFSSL_BAD_FILE;
    else {
        if (ssl)
            ret = wolfSSL_SetTmpDH_buffer(ssl, myBuffer, sz, format);
        else
            ret = wolfSSL_CTX_SetTmpDH_buffer(ctx, myBuffer, sz, format);
    }

    XFCLOSE(file);
    if (dynamic)
        XFREE(myBuffer, ctx->heap, DYNAMIC_TYPE_FILE);

    return ret;
}

/* server Diffie-Hellman parameters */
int wolfSSL_SetTmpDH_file(WOLFSSL* ssl, const char* fname, int format)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    return wolfSSL_SetTmpDH_file_wrapper(ssl->ctx, ssl, fname, format);
}


/* server Diffie-Hellman parameters */
int wolfSSL_CTX_SetTmpDH_file(WOLFSSL_CTX* ctx, const char* fname, int format)
{
    return wolfSSL_SetTmpDH_file_wrapper(ctx, NULL, fname, format);
}

#endif /* NO_DH */

#endif /* NO_FILESYSTEM */

#ifndef NO_CHECK_PRIVATE_KEY
/* Check private against public in certificate for match
 *
 * ctx  WOLFSSL_CTX structure to check private key in
 *
 * Returns SSL_SUCCESS on good private key and SSL_FAILURE if miss matched. */
int wolfSSL_CTX_check_private_key(const WOLFSSL_CTX* ctx)
{
#ifdef WOLFSSL_SMALL_STACK
    DecodedCert* der = NULL;
#else
    DecodedCert  der[1];
#endif
    word32 size;
    byte*  buff;
    int    ret = WOLFSSL_FAILURE;

    WOLFSSL_ENTER("wolfSSL_CTX_check_private_key");

    if (ctx == NULL || ctx->certificate == NULL) {
        return WOLFSSL_FAILURE;
    }

#ifndef NO_CERTS
#ifdef WOLFSSL_SMALL_STACK
    der = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL, DYNAMIC_TYPE_DCERT);
    if (der == NULL)
        return MEMORY_E;
#endif

    size = ctx->certificate->length;
    buff = ctx->certificate->buffer;
    InitDecodedCert(der, buff, size, ctx->heap);
    if (ParseCertRelative(der, CERT_TYPE, NO_VERIFY, NULL) != 0) {
        FreeDecodedCert(der);
    #ifdef WOLFSSL_SMALL_STACK
        XFREE(der, NULL, DYNAMIC_TYPE_DCERT);
    #endif
        return WOLFSSL_FAILURE;
    }

    size = ctx->privateKey->length;
    buff = ctx->privateKey->buffer;
#ifdef WOLF_CRYPTO_CB
    if (ctx->privateKeyDevId != INVALID_DEVID) {
        int type = 0;
        void *pkey = NULL;

    #ifndef NO_RSA
        if (der->keyOID == RSAk) {
            type = DYNAMIC_TYPE_RSA;
        }
    #endif
    #ifdef HAVE_ECC
        if (der->keyOID == ECDSAk) {
            type = DYNAMIC_TYPE_ECC;
        }
    #endif
        ret = CreateDevPrivateKey(&pkey, buff, size, type, ctx->privateKeyLabel,
                                  ctx->privateKeyId, ctx->heap,
                                  ctx->privateKeyDevId);
    #ifndef NO_RSA
        if (ret == 0 && der->keyOID == RSAk) {
            ret = wc_CryptoCb_RsaCheckPrivKey((RsaKey*)pkey, der->publicKey,
                                              der->pubKeySize);
            wc_FreeRsaKey((RsaKey*)pkey);
        }
    #endif
    #ifdef HAVE_ECC
        if (ret == 0 && der->keyOID == ECDSAk) {
            ret = wc_CryptoCb_EccCheckPrivKey((ecc_key*)pkey, der->publicKey,
                                              der->pubKeySize);
            wc_ecc_free((ecc_key*)pkey);
        }
    #endif
        if (pkey != NULL) {
            XFREE(pkey, ctx->heap, type);
        }
        if (ret != CRYPTOCB_UNAVAILABLE) {
            if (ret == 0) {
                ret = WOLFSSL_SUCCESS;
            }
            else {
                ret = WOLFSSL_FAILURE;
            }
        }
    }
    else {
        /* fall through if unavailable */
        ret = CRYPTOCB_UNAVAILABLE;
    }

    if (ret == CRYPTOCB_UNAVAILABLE)
#endif
    {
        ret = wc_CheckPrivateKeyCert(buff, size, der);
        if (ret == 1) {
            ret = WOLFSSL_SUCCESS;
        }
        else {
            ret = WOLFSSL_FAILURE;
        }
    }
    FreeDecodedCert(der);
#ifdef WOLFSSL_SMALL_STACK
    XFREE(der, NULL, DYNAMIC_TYPE_DCERT);
#endif

    return ret;
#else
    WOLFSSL_MSG("NO_CERTS is defined, can not check private key");
    return WOLFSSL_FAILURE;
#endif
}
#endif /* !NO_CHECK_PRIVATE_KEY */

#ifdef OPENSSL_EXTRA

#ifndef NO_BIO
/* put SSL type in extra for now, not very common */

/* Converts a DER format key read from "bio" to a PKCS8 structure.
 *
 * bio  input bio to read DER from
 * pkey If not NULL then this pointer will be overwritten with a new PKCS8
 *      structure.
 *
 * returns a WOLFSSL_PKCS8_PRIV_KEY_INFO pointer on success and NULL in fail
 *         case.
 */
WOLFSSL_PKCS8_PRIV_KEY_INFO* wolfSSL_d2i_PKCS8_PKEY_bio(WOLFSSL_BIO* bio,
        WOLFSSL_PKCS8_PRIV_KEY_INFO** pkey)
{
    WOLFSSL_PKCS8_PRIV_KEY_INFO* pkcs8 = NULL;
#ifdef WOLFSSL_PEM_TO_DER
    unsigned char* mem = NULL;
    int memSz;
    int keySz;
    word32 algId;

    WOLFSSL_MSG("wolfSSL_d2i_PKCS8_PKEY_bio()");

    if (bio == NULL) {
        return NULL;
    }

    if ((memSz = wolfSSL_BIO_get_mem_data(bio, &mem)) < 0) {
        return NULL;
    }

    if ((keySz = wc_KeyPemToDer(mem, memSz, mem, memSz, NULL)) < 0) {
        WOLFSSL_MSG("Not PEM format");
        keySz = memSz;
        if ((keySz = ToTraditional_ex((byte*)mem, (word32)keySz, &algId)) < 0) {
            return NULL;
        }
    }

    pkcs8 = wolfSSL_EVP_PKEY_new();
    if (pkcs8 == NULL) {
        return NULL;
    }

    pkcs8->pkey.ptr = (char*)XMALLOC(keySz, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
    if (pkcs8->pkey.ptr == NULL) {
        wolfSSL_EVP_PKEY_free(pkcs8);
        return NULL;
    }
    XMEMCPY(pkcs8->pkey.ptr, mem, keySz);
    pkcs8->pkey_sz = keySz;

    if (pkey != NULL) {
        *pkey = pkcs8;
    }
#else
    (void)bio;
    (void)pkey;
#endif /* WOLFSSL_PEM_TO_DER */

    return pkcs8;
}


/* expecting DER format public key
 *
 * bio  input bio to read DER from
 * out  If not NULL then this pointer will be overwritten with a new
 * WOLFSSL_EVP_PKEY pointer
 *
 * returns a WOLFSSL_EVP_PKEY pointer on success and NULL in fail case.
 */
WOLFSSL_EVP_PKEY* wolfSSL_d2i_PUBKEY_bio(WOLFSSL_BIO* bio,
                                         WOLFSSL_EVP_PKEY** out)
{
    unsigned char* mem;
    long memSz;
    WOLFSSL_EVP_PKEY* pkey = NULL;

    WOLFSSL_ENTER("wolfSSL_d2i_PUBKEY_bio()");

    if (bio == NULL) {
        return NULL;
    }
    (void)out;

    memSz = wolfSSL_BIO_get_len(bio);
    if (memSz <= 0) {
        return NULL;
    }

    mem = (unsigned char*)XMALLOC(memSz, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (mem == NULL) {
        return NULL;
    }

    if (wolfSSL_BIO_read(bio, mem, (int)memSz) == memSz) {
        pkey = wolfSSL_d2i_PUBKEY(NULL, (const unsigned char**)&mem, memSz);
        if (out != NULL && pkey != NULL) {
            *out = pkey;
        }
    }

    XFREE(mem, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    return pkey;
}

#endif /* !NO_BIO */



/* Converts a DER encoded public key to a WOLFSSL_EVP_PKEY structure.
 *
 * out  pointer to new WOLFSSL_EVP_PKEY structure. Can be NULL
 * in   DER buffer to convert
 * inSz size of in buffer
 *
 * returns a pointer to a new WOLFSSL_EVP_PKEY structure on success and NULL
 *         on fail
 */
WOLFSSL_EVP_PKEY* wolfSSL_d2i_PUBKEY(WOLFSSL_EVP_PKEY** out,
                                     const unsigned char** in, long inSz)
{
    WOLFSSL_EVP_PKEY* pkey = NULL;
    const unsigned char* mem;
    long memSz = inSz;

    WOLFSSL_ENTER("wolfSSL_d2i_PUBKEY");

    if (in == NULL || inSz < 0) {
        WOLFSSL_MSG("Bad argument");
        return NULL;
    }
    mem = *in;

    #if !defined(NO_RSA)
    {
        RsaKey rsa;
        word32 keyIdx = 0;

        /* test if RSA key */
        if (wc_InitRsaKey(&rsa, NULL) == 0 &&
            wc_RsaPublicKeyDecode(mem, &keyIdx, &rsa, (word32)memSz) == 0) {
            wc_FreeRsaKey(&rsa);
            pkey = wolfSSL_EVP_PKEY_new();
            if (pkey != NULL) {
                pkey->pkey_sz = keyIdx;
                pkey->pkey.ptr = (char*)XMALLOC(memSz, NULL,
                        DYNAMIC_TYPE_PUBLIC_KEY);
                if (pkey->pkey.ptr == NULL) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }
                XMEMCPY(pkey->pkey.ptr, mem, keyIdx);
                pkey->type = EVP_PKEY_RSA;
                if (out != NULL) {
                    *out = pkey;
                }

                pkey->ownRsa = 1;
                pkey->rsa = wolfSSL_RSA_new();
                if (pkey->rsa == NULL) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }

                if (wolfSSL_RSA_LoadDer_ex(pkey->rsa,
                            (const unsigned char*)pkey->pkey.ptr,
                            pkey->pkey_sz, WOLFSSL_RSA_LOAD_PUBLIC) != 1) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }

                return pkey;
            }
            else {
                WOLFSSL_MSG("RSA wolfSSL_EVP_PKEY_new error");
            }
        }
        wc_FreeRsaKey(&rsa);
    }
    #endif /* NO_RSA */

    #ifdef HAVE_ECC
    {
        word32  keyIdx = 0;
        ecc_key ecc;

        if (wc_ecc_init(&ecc) == 0 &&
            wc_EccPublicKeyDecode(mem, &keyIdx, &ecc, (word32)memSz) == 0) {
            wc_ecc_free(&ecc);
            pkey = wolfSSL_EVP_PKEY_new();
            if (pkey != NULL) {
                pkey->pkey_sz = keyIdx;
                pkey->pkey.ptr = (char*)XMALLOC(keyIdx, NULL,
                        DYNAMIC_TYPE_PUBLIC_KEY);
                if (pkey->pkey.ptr == NULL) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }
                XMEMCPY(pkey->pkey.ptr, mem, keyIdx);
                pkey->type = EVP_PKEY_EC;
                if (out != NULL) {
                    *out = pkey;
                }

                pkey->ownEcc = 1;
                pkey->ecc = wolfSSL_EC_KEY_new();
                if (pkey->ecc == NULL) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }

                if (wolfSSL_EC_KEY_LoadDer_ex(pkey->ecc,
                            (const unsigned char*)pkey->pkey.ptr,
                            pkey->pkey_sz, WOLFSSL_EC_KEY_LOAD_PUBLIC) != 1) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }

                return pkey;
            }
            else {
                WOLFSSL_MSG("ECC wolfSSL_EVP_PKEY_new error");
            }
        }
        wc_ecc_free(&ecc);
    }
    #endif /* HAVE_ECC */

    #if !defined(NO_DSA)
    {
        DsaKey dsa;
        word32 keyIdx = 0;

        /* test if DSA key */
        if (wc_InitDsaKey(&dsa) == 0 &&
            wc_DsaPublicKeyDecode(mem, &keyIdx, &dsa, (word32)memSz) == 0) {
            wc_FreeDsaKey(&dsa);
            pkey = wolfSSL_EVP_PKEY_new();

            if (pkey != NULL) {
                pkey->pkey_sz = keyIdx;
                pkey->pkey.ptr = (char*)XMALLOC(memSz, NULL,
                        DYNAMIC_TYPE_PUBLIC_KEY);
                if (pkey->pkey.ptr == NULL) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }
                XMEMCPY(pkey->pkey.ptr, mem, keyIdx);
                pkey->type = EVP_PKEY_DSA;
                if (out != NULL) {
                    *out = pkey;
                }

                pkey->ownDsa = 1;
                pkey->dsa = wolfSSL_DSA_new();
                if (pkey->dsa == NULL) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }


                if (wolfSSL_DSA_LoadDer_ex(pkey->dsa,
                            (const unsigned char*)pkey->pkey.ptr,
                            pkey->pkey_sz, WOLFSSL_DSA_LOAD_PUBLIC) != 1) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }

                return pkey;
            }
            else {
                WOLFSSL_MSG("DSA wolfSSL_EVP_PKEY_new error");
            }
        }
        wc_FreeDsaKey(&dsa);
    }
    #endif /* NO_DSA */

    #if !defined(NO_DH) && (defined(WOLFSSL_QT) || defined(OPENSSL_ALL))
    #if !defined(HAVE_FIPS) || (defined(HAVE_FIPS_VERSION) && \
        (HAVE_FIPS_VERSION > 2))
    {
        DhKey dh;
        word32 keyIdx = 0;

        /* test if DH key */
        if (wc_InitDhKey(&dh) == 0 &&
            wc_DhKeyDecode(mem, &keyIdx, &dh, (word32)memSz) == 0) {
            wc_FreeDhKey(&dh);
            pkey = wolfSSL_EVP_PKEY_new();

            if (pkey != NULL) {
                pkey->pkey_sz = (int)memSz;
                pkey->pkey.ptr = (char*)XMALLOC(memSz, NULL,
                        DYNAMIC_TYPE_PUBLIC_KEY);
                if (pkey->pkey.ptr == NULL) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }
                XMEMCPY(pkey->pkey.ptr, mem, memSz);
                pkey->type = EVP_PKEY_DH;
                if (out != NULL) {
                    *out = pkey;
                }

                pkey->ownDh = 1;
                pkey->dh = wolfSSL_DH_new();
                if (pkey->dh == NULL) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }

                if (wolfSSL_DH_LoadDer(pkey->dh,
                            (const unsigned char*)pkey->pkey.ptr,
                            pkey->pkey_sz) != WOLFSSL_SUCCESS) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }

                return pkey;
            }
            else {
                WOLFSSL_MSG("DH wolfSSL_EVP_PKEY_new error");
            }
        }
        wc_FreeDhKey(&dh);
    }
    #endif /* !HAVE_FIPS || HAVE_FIPS_VERSION > 2 */
    #endif /* !NO_DH && (WOLFSSL_QT || OPENSSL_ALL) */

    #if !defined(NO_DH) && defined(OPENSSL_EXTRA) && defined(WOLFSSL_DH_EXTRA)
    #if !defined(HAVE_FIPS) || (defined(HAVE_FIPS_VERSION) && \
            (HAVE_FIPS_VERSION > 2))
    {
        DhKey   dh;
        word32  keyIdx = 0;
        DhKey*  key = NULL;
        int ret;
        int elements;
        /* test if DH-public key */
        if (wc_InitDhKey(&dh) != 0)
            return NULL;

        ret = wc_DhPublicKeyDecode(mem, &keyIdx, &dh, (word32)memSz);
        wc_FreeDhKey(&dh);

        if (ret == 0) {
            pkey = wolfSSL_EVP_PKEY_new();
            if (pkey != NULL) {
                pkey->type     = EVP_PKEY_DH;
                pkey->pkey_sz  = (int)memSz;
                pkey->pkey.ptr = (char*)XMALLOC(memSz, NULL,
                    DYNAMIC_TYPE_PUBLIC_KEY);
                if (pkey->pkey.ptr == NULL) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }
                XMEMCPY(pkey->pkey.ptr, mem, memSz);
                if (out != NULL) {
                    *out = pkey;
                }
                pkey->ownDh = 1;
                pkey->dh = wolfSSL_DH_new();
                if (pkey->dh == NULL) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }

                key = (DhKey*)pkey->dh->internal;

                keyIdx = 0;
                if (wc_DhPublicKeyDecode(mem, &keyIdx, key, (word32)memSz) == 0)
                {
                    elements = ELEMENT_P | ELEMENT_G | ELEMENT_Q | ELEMENT_PUB;
                    if( SetDhExternal_ex(pkey->dh, elements)
                                                         == WOLFSSL_SUCCESS ){
                        return pkey;
                    }
                    /*
                    if (SetIndividualExternal(&(pkey->dh->p), &key->p)
                        == WOLFSSL_SUCCESS &&
                        SetIndividualExternal(&(pkey->dh->g), &key->g)
                        == WOLFSSL_SUCCESS &&
                        SetIndividualExternal(&(pkey->dh->q), &key->q)
                        == WOLFSSL_SUCCESS &&
                        SetIndividualExternal(&(pkey->dh->pub_key), &key->pub)
                        == WOLFSSL_SUCCESS) {
                        return pkey;
                    } */
                }
                else {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }
            }
        }
    }
    #endif /* !HAVE_FIPS || HAVE_FIPS_VERSION > 2 */
    #endif /* !NO_DH &&  OPENSSL_EXTRA && WOLFSSL_DH_EXTRA */

    if (pkey == NULL) {
        WOLFSSL_MSG("wolfSSL_d2i_PUBKEY couldn't determine key type");
    }

    return pkey;
}

/* helper function to get raw pointer to DER buffer from WOLFSSL_EVP_PKEY */
static int wolfSSL_EVP_PKEY_get_der(const WOLFSSL_EVP_PKEY* key, unsigned char** der)
{
    unsigned char* pt;
    int sz;

    if (!key || !key->pkey_sz)
        return WOLFSSL_FATAL_ERROR;

    sz = key->pkey_sz;
    if (der) {
        pt = (unsigned char*)key->pkey.ptr;
        if (*der) {
            /* since this function signature has no size value passed in it is
             * assumed that the user has allocated a large enough buffer */
            XMEMCPY(*der, pt, sz);
            *der += sz;
        }
        else {
            *der = (unsigned char*)XMALLOC(sz, NULL, DYNAMIC_TYPE_OPENSSL);
            if (*der == NULL) {
                return WOLFSSL_FATAL_ERROR;
            }
            XMEMCPY(*der, pt, sz);
        }
    }
    return sz;
}

int wolfSSL_i2d_PUBKEY(const WOLFSSL_EVP_PKEY *key, unsigned char **der)
{
    return wolfSSL_EVP_PKEY_get_der(key, der);
}


/* Reads in a DER format key. If PKCS8 headers are found they are stripped off.
 *
 * type  type of key
 * out   newly created WOLFSSL_EVP_PKEY structure
 * in    pointer to input key DER
 * inSz  size of in buffer
 *
 * On success a non null pointer is returned and the pointer in is advanced the
 * same number of bytes read.
 */
WOLFSSL_EVP_PKEY* wolfSSL_d2i_PrivateKey(int type, WOLFSSL_EVP_PKEY** out,
        const unsigned char **in, long inSz)
{
    WOLFSSL_EVP_PKEY* local;
    word32 idx = 0;
    int    ret;
    word32 algId;

    WOLFSSL_ENTER("wolfSSL_d2i_PrivateKey");

    if (in == NULL || inSz < 0) {
        WOLFSSL_MSG("Bad argument");
        return NULL;
    }

    /* Check if input buffer has PKCS8 header. In the case that it does not
     * have a PKCS8 header then do not error out. */
    if ((ret = ToTraditionalInline_ex((const byte*)(*in), &idx, (word32)inSz,
                                                                 &algId)) > 0) {
        WOLFSSL_MSG("Found and removed PKCS8 header");
    }
    else {
        if (ret != ASN_PARSE_E) {
            WOLFSSL_MSG("Unexpected error with trying to remove PKCS8 header");
            return NULL;
        }
    }

    if (out != NULL && *out != NULL) {
        wolfSSL_EVP_PKEY_free(*out);
        *out = NULL;
    }
    local = wolfSSL_EVP_PKEY_new();
    if (local == NULL) {
        return NULL;
    }

    /* sanity check on idx before use */
    if ((int)idx > inSz) {
        WOLFSSL_MSG("Issue with index pointer");
        wolfSSL_EVP_PKEY_free(local);
        local = NULL;
        return NULL;
    }

    local->type     = type;
    local->pkey_sz  = (int)inSz - idx;
    local->pkey.ptr = (char*)XMALLOC(inSz - idx, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
    if (local->pkey.ptr == NULL) {
        wolfSSL_EVP_PKEY_free(local);
        local = NULL;
        return NULL;
    }
    else {
        XMEMCPY(local->pkey.ptr, *in + idx, inSz - idx);
    }

    switch (type) {
#ifndef NO_RSA
        case EVP_PKEY_RSA:
            local->ownRsa = 1;
            local->rsa = wolfSSL_RSA_new();
            if (local->rsa == NULL) {
                wolfSSL_EVP_PKEY_free(local);
                return NULL;
            }
            if (wolfSSL_RSA_LoadDer_ex(local->rsa,
                      (const unsigned char*)local->pkey.ptr, local->pkey_sz,
                      WOLFSSL_RSA_LOAD_PRIVATE) != WOLFSSL_SUCCESS) {
                wolfSSL_EVP_PKEY_free(local);
                return NULL;
            }
            break;
#endif /* NO_RSA */
#ifdef HAVE_ECC
        case EVP_PKEY_EC:
            local->ownEcc = 1;
            local->ecc = wolfSSL_EC_KEY_new();
            if (local->ecc == NULL) {
                wolfSSL_EVP_PKEY_free(local);
                return NULL;
            }
            if (wolfSSL_EC_KEY_LoadDer(local->ecc,
                      (const unsigned char*)local->pkey.ptr, local->pkey_sz)
                      != WOLFSSL_SUCCESS) {
                wolfSSL_EVP_PKEY_free(local);
                return NULL;
            }
            break;
#endif /* HAVE_ECC */
#if defined(WOLFSSL_QT) || defined(OPENSSL_ALL) || defined(WOLFSSL_OPENSSH)
#ifndef NO_DSA
        case EVP_PKEY_DSA:
            local->ownDsa = 1;
            local->dsa = wolfSSL_DSA_new();
            if (local->dsa == NULL) {
                wolfSSL_EVP_PKEY_free(local);
                return NULL;
            }
            if (wolfSSL_DSA_LoadDer(local->dsa,
                    (const unsigned char*)local->pkey.ptr, local->pkey_sz)
                    != WOLFSSL_SUCCESS) {
                wolfSSL_EVP_PKEY_free(local);
                return NULL;
            }
            break;
#endif /* NO_DSA */
#ifndef NO_DH
#if !defined(HAVE_FIPS) || (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION>2))
        case EVP_PKEY_DH:
            local->ownDh = 1;
            local->dh = wolfSSL_DH_new();
            if (local->dh == NULL) {
                wolfSSL_EVP_PKEY_free(local);
                return NULL;
            }
            if (wolfSSL_DH_LoadDer(local->dh,
                      (const unsigned char*)local->pkey.ptr, local->pkey_sz)
                      != WOLFSSL_SUCCESS) {
                wolfSSL_EVP_PKEY_free(local);
                return NULL;
            }
            break;
#endif /* !HAVE_FIPS || HAVE_FIPS_VERSION > 2 */
#endif /* HAVE_DH */
#endif /* WOLFSSL_QT || OPENSSL_ALL || WOLFSSL_OPENSSH */
        default:
            WOLFSSL_MSG("Unsupported key type");
            wolfSSL_EVP_PKEY_free(local);
            return NULL;
    }

    /* advance pointer with success */
    if (local != NULL) {
        if ((idx + local->pkey_sz) <= (word32)inSz) {
            *in = *in + idx + local->pkey_sz;
        }

        if (out != NULL) {
            *out = local;
        }
    }

    return local;
}

#ifndef NO_CERTS

int wolfSSL_check_private_key(const WOLFSSL* ssl)
{
    DecodedCert der;
    word32 size;
    byte*  buff;
    int    ret;

    if (ssl == NULL) {
        return WOLFSSL_FAILURE;
    }

    size = ssl->buffers.certificate->length;
    buff = ssl->buffers.certificate->buffer;
    InitDecodedCert(&der, buff, size, ssl->heap);
#ifdef HAVE_PK_CALLBACKS
    ret = InitSigPkCb((WOLFSSL*)ssl, &der.sigCtx);
    if (ret != 0) {
        FreeDecodedCert(&der);
        return ret;
    }
#endif

    if (ParseCertRelative(&der, CERT_TYPE, NO_VERIFY, NULL) != 0) {
        FreeDecodedCert(&der);
        return WOLFSSL_FAILURE;
    }

    size = ssl->buffers.key->length;
    buff = ssl->buffers.key->buffer;
#ifdef WOLF_CRYPTO_CB
    if (ssl->buffers.keyDevId != INVALID_DEVID) {
        int type = 0;
        void *pkey = NULL;

    #ifndef NO_RSA
        if (der.keyOID == RSAk) {
            type = DYNAMIC_TYPE_RSA;
        }
    #endif
    #ifdef HAVE_ECC
        if (der.keyOID == ECDSAk) {
            type = DYNAMIC_TYPE_ECC;
        }
    #endif
        ret = CreateDevPrivateKey(&pkey, buff, size, type,
                                  ssl->buffers.keyLabel,
                                  ssl->buffers.keyId, ssl->heap,
                                  ssl->buffers.keyDevId);
    #ifndef NO_RSA
        if (ret == 0 && der.keyOID == RSAk) {
            ret = wc_CryptoCb_RsaCheckPrivKey((RsaKey*)pkey, der.publicKey,
                                              der.pubKeySize);
            if (ret == 0)
                ret = WOLFSSL_SUCCESS;
            wc_FreeRsaKey((RsaKey*)pkey);
        }
    #endif
    #ifdef HAVE_ECC
        if (ret == 0 && der.keyOID == ECDSAk) {
            ret = wc_CryptoCb_EccCheckPrivKey((ecc_key*)pkey, der.publicKey,
                                              der.pubKeySize);
            if (ret == 0)
                ret = WOLFSSL_SUCCESS;
            wc_ecc_free((ecc_key*)pkey);
        }
    #endif
        if (pkey != NULL) {
            XFREE(pkey, ssl->heap, type);
        }
    }
    else {
        /* fall through if unavailable */
        ret = CRYPTOCB_UNAVAILABLE;
    }

    if (ret == CRYPTOCB_UNAVAILABLE)
#endif
        ret  = wc_CheckPrivateKeyCert(buff, size, &der);
    FreeDecodedCert(&der);
    return ret;
}

#if defined(OPENSSL_ALL)
/* Returns the number of X509V3 extensions in X509 object, or 0 on failure */
int wolfSSL_X509_get_ext_count(const WOLFSSL_X509* passedCert)
{
    int extCount = 0;
    int length = 0;
    int outSz = 0;
    const byte* rawCert;
    int sz = 0;
    word32 idx = 0;
    DecodedCert cert;
    const byte* input;

    WOLFSSL_ENTER("wolfSSL_X509_get_ext_count()");
    if (passedCert == NULL) {
        WOLFSSL_MSG("\tNot passed a certificate");
        return WOLFSSL_FAILURE;
    }

    rawCert = wolfSSL_X509_get_der((WOLFSSL_X509*)passedCert, &outSz);
    if (rawCert == NULL) {
        WOLFSSL_MSG("\tpassedCert has no internal DerBuffer set.");
        return WOLFSSL_FAILURE;
    }
    InitDecodedCert(&cert, rawCert, (word32)outSz, 0);

    if (ParseCert(&cert,
#ifdef WOLFSSL_CERT_REQ
            passedCert->isCSR ? CERTREQ_TYPE :
#endif
                    CA_TYPE,
            NO_VERIFY, NULL) < 0) {
        WOLFSSL_MSG("\tCertificate parsing failed");
        FreeDecodedCert(&cert);
        return WOLFSSL_FAILURE;
    }

    input = cert.extensions;
    sz = cert.extensionsSz;

    if (input == NULL || sz == 0) {
        WOLFSSL_MSG("\tsz or input NULL error");
        FreeDecodedCert(&cert);
        return WOLFSSL_FAILURE;
    }

#ifdef WOLFSSL_CERT_REQ
    if (!passedCert->isCSR)
#endif
    {
        if (input[idx++] != ASN_EXTENSIONS) {
            WOLFSSL_MSG("\tfail: should be an EXTENSIONS");
            FreeDecodedCert(&cert);
            return WOLFSSL_FAILURE;
        }

        if (GetLength(input, &idx, &length, sz) < 0) {
            WOLFSSL_MSG("\tfail: invalid length");
            FreeDecodedCert(&cert);
            return WOLFSSL_FAILURE;
        }
    }

    if (GetSequence(input, &idx, &length, sz) < 0) {
        WOLFSSL_MSG("\tfail: should be a SEQUENCE (1)");
        FreeDecodedCert(&cert);
        return WOLFSSL_FAILURE;
    }

    while (idx < (word32)sz) {
        if (GetSequence(input, &idx, &length, sz) < 0) {
            WOLFSSL_MSG("\tfail: should be a SEQUENCE");
            FreeDecodedCert(&cert);
            return WOLFSSL_FAILURE;
        }
        idx += length;
        extCount++;
    }
    FreeDecodedCert(&cert);
    return extCount;
}

/* Creates and returns pointer to a new X509_EXTENSION object in memory */
WOLFSSL_X509_EXTENSION* wolfSSL_X509_EXTENSION_new(void)
{
    WOLFSSL_X509_EXTENSION* newExt;

    WOLFSSL_ENTER("wolfSSL_X509_EXTENSION_new");

    newExt = (WOLFSSL_X509_EXTENSION*)XMALLOC(sizeof(WOLFSSL_X509_EXTENSION),
              NULL, DYNAMIC_TYPE_X509_EXT);
    if (newExt == NULL)
        return NULL;
    XMEMSET(newExt, 0, sizeof(WOLFSSL_X509_EXTENSION));

    return newExt;
}

void wolfSSL_X509_EXTENSION_free(WOLFSSL_X509_EXTENSION* x)
{
    WOLFSSL_ASN1_STRING asn1;
    WOLFSSL_ENTER("wolfSSL_X509_EXTENSION_free");
    if (x == NULL)
        return;

    if (x->obj != NULL)
        wolfSSL_ASN1_OBJECT_free(x->obj);

    asn1 = x->value;
    if (asn1.length > 0 && asn1.data != NULL && asn1.isDynamic)
        XFREE(asn1.data, NULL, DYNAMIC_TYPE_OPENSSL);

    wolfSSL_sk_free(x->ext_sk);

    XFREE(x, NULL, DYNAMIC_TYPE_X509_EXT);
}

/* Creates and returns a new WOLFSSL_X509_EXTENSION stack. */
WOLFSSL_STACK* wolfSSL_sk_new_x509_ext(void)
{
    WOLFSSL_STACK* sk;
    WOLFSSL_ENTER("wolfSSL_sk_new_x509_ext");

    sk = wolfSSL_sk_new_null();
    if (sk) {
        sk->type = STACK_TYPE_X509_EXT;
    }
    return sk;
}

/* return 1 on success 0 on fail */
int wolfSSL_sk_X509_EXTENSION_push(WOLFSSL_STACK* sk,WOLFSSL_X509_EXTENSION* ext)
{
    WOLFSSL_STACK* node;

    WOLFSSL_ENTER("wolfSSL_sk_X509_EXTENSION_push");

    if (sk == NULL || ext == NULL) {
        return WOLFSSL_FAILURE;
    }

    /* no previous values in stack */
    if (sk->data.ext == NULL) {
        sk->data.ext = ext;
        sk->num += 1;
        return WOLFSSL_SUCCESS;
    }

    /* stack already has value(s) create a new node and add more */
    node = (WOLFSSL_STACK*)XMALLOC(sizeof(WOLFSSL_STACK), NULL,
                                                             DYNAMIC_TYPE_X509);
    if (node == NULL) {
        WOLFSSL_MSG("Memory error");
        return WOLFSSL_FAILURE;
    }
    XMEMSET(node, 0, sizeof(WOLFSSL_STACK));

    /* push new obj onto head of stack */
    node->data.ext  = sk->data.ext;
    node->next      = sk->next;
    node->type      = sk->type;
    sk->next        = node;
    sk->data.ext    = ext;
    sk->num        += 1;

    return WOLFSSL_SUCCESS;
}

/* Free the structure for X509_EXTENSION stack
 *
 * sk  stack to free nodes in
 */
void wolfSSL_sk_X509_EXTENSION_free(WOLFSSL_STACK* sk)
{
    WOLFSSL_STACK* node;

    WOLFSSL_ENTER("wolfSSL_sk_X509_EXTENSION_free");

    if (sk == NULL) {
        return;
    }

    /* parse through stack freeing each node */
    node = sk->next;
    while ((node != NULL) && (sk->num > 1)) {
        WOLFSSL_STACK* tmp = node;
        node = node->next;

        wolfSSL_X509_EXTENSION_free(tmp->data.ext);
        XFREE(tmp, NULL, DYNAMIC_TYPE_X509);
        sk->num -= 1;
    }

    /* free head of stack */
    if (sk->num == 1) {
        wolfSSL_X509_EXTENSION_free(sk->data.ext);
    }
    XFREE(sk, NULL, DYNAMIC_TYPE_X509);
}

int wolfSSL_ASN1_BIT_STRING_set_bit(WOLFSSL_ASN1_BIT_STRING* str, int pos,
    int val)
{
    int bytes_cnt, bit;
    byte* temp;

    if (!str || (val != 0 && val != 1) || pos < 0) {
        return WOLFSSL_FAILURE;
    }

    bytes_cnt = pos/8;
    bit = 1<<(7-(pos%8));

    if (bytes_cnt+1 > str->length) {
        if (!(temp = (byte*)XREALLOC(str->data, bytes_cnt+1, NULL,
                DYNAMIC_TYPE_OPENSSL))) {
            return WOLFSSL_FAILURE;
        }
        XMEMSET(temp+str->length, 0, bytes_cnt+1 - str->length);
        str->data = temp;
        str->length = bytes_cnt+1;
    }

    str->data[bytes_cnt] &= ~bit;
    str->data[bytes_cnt] |= val ? bit : 0;

    return WOLFSSL_SUCCESS;
}

static WOLFSSL_STACK* generateExtStack(const WOLFSSL_X509 *x)
{
    int numOfExt, i;
    WOLFSSL_X509 *x509 = (WOLFSSL_X509*)x;
    WOLFSSL_STACK* ret;
    WOLFSSL_STACK* tmp;

    if (!x509) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    /* Save x509->ext_sk */
    tmp = x509->ext_sk;
    x509->ext_sk = NULL;
    numOfExt = wolfSSL_X509_get_ext_count(x509);

    for (i = 0; i < numOfExt; i++) {
        /* Build the extension stack */
        (void)wolfSSL_X509_set_ext(x509, i);
    }

    /* Restore */
    ret = x509->ext_sk;
    x509->ext_sk = tmp;
    return ret;
}

/**
 * @param x Certificate to extract extensions from
 * @return STACK_OF(X509_EXTENSION)*
 */
const WOLFSSL_STACK *wolfSSL_X509_get0_extensions(const WOLFSSL_X509 *x)
{
    int numOfExt;
    WOLFSSL_X509 *x509 = (WOLFSSL_X509*)x;
    WOLFSSL_ENTER("wolfSSL_X509_get0_extensions");

    if (!x509) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    numOfExt = wolfSSL_X509_get_ext_count(x509);

    if (numOfExt != wolfSSL_sk_num(x509->ext_sk_full)) {
        wolfSSL_sk_free(x509->ext_sk_full);
        x509->ext_sk_full = generateExtStack(x);
    }

    return x509->ext_sk_full;
}

/**
 * Caller is responsible for freeing the returned stack.
 */
const WOLFSSL_STACK *wolfSSL_X509_REQ_get_extensions(const WOLFSSL_X509 *x)
{
    return generateExtStack(x);
}

/* Gets the X509_EXTENSION* ext based on it's location in WOLFSSL_X509* x509.
 *
 * x509   : The X509 structure to look for the extension.
 * loc    : Location of the extension. If the extension is found at the given
 * location, a new X509_EXTENSION structure is populated with extension-specific
 * data based on the extension type.

 * Returns NULL on error or pointer to X509_EXTENSION structure containing the
 * extension. The returned X509_EXTENSION should not be free'd by caller.
 * The returned X509_EXTENSION is pushed onto a stack inside the x509 argument.
 * This is later free'd when x509 is free'd.
 *
 * NOTE: for unknown extension NIDs, a X509_EXTENSION is populated with the
 * extension oid as the ASN1_OBJECT (QT compatibility)
 */
WOLFSSL_X509_EXTENSION* wolfSSL_X509_get_ext(const WOLFSSL_X509* x509, int loc)
{
    WOLFSSL_X509_EXTENSION* ext = NULL;
    WOLFSSL_ENTER("wolfSSL_X509_get_ext");
    if (x509 == NULL)
        return NULL;

   ext = wolfSSL_X509_set_ext((WOLFSSL_X509*) x509, loc);
   return ext;
}

int wolfSSL_X509_get_ext_by_OBJ(const WOLFSSL_X509 *x,
        const WOLFSSL_ASN1_OBJECT *obj, int lastpos)
{
    const WOLF_STACK_OF(WOLFSSL_X509_EXTENSION) *sk;

    if (!x || !obj) {
        WOLFSSL_MSG("Bad parameter");
        return -1;
    }

    sk = wolfSSL_X509_get0_extensions(x);
    if (!sk) {
        WOLFSSL_MSG("No extensions");
        return -1;
    }
    lastpos++;
    if (lastpos < 0)
        lastpos = 0;
    for (; lastpos < wolfSSL_sk_num(sk); lastpos++)
        if (wolfSSL_OBJ_cmp((WOLFSSL_ASN1_OBJECT*)wolfSSL_sk_value(sk,
                        lastpos), obj) == 0)
            return lastpos;
    return -1;
}

/* Pushes a new X509_EXTENSION* ext onto the stack inside WOLFSSL_X509* x509.
 * This is currently a helper function for wolfSSL_X509_get_ext
 * Caller does not free the returned WOLFSSL_X509_EXTENSION*
 */
WOLFSSL_X509_EXTENSION* wolfSSL_X509_set_ext(WOLFSSL_X509* x509, int loc)
{
    int extCount = 0, length = 0, outSz = 0, sz = 0, ret = 0;
    int objSz = 0, isSet = 0;
    const byte* rawCert;
    const byte* input;
    byte* oidBuf;
    word32 oid, idx = 0, tmpIdx = 0;
    WOLFSSL_X509_EXTENSION* ext = NULL;
    WOLFSSL_ASN1_INTEGER* a;
    WOLFSSL_STACK* sk;
    DecodedCert cert;

    WOLFSSL_ENTER("wolfSSL_X509_set_ext");

    if(x509 == NULL){
        WOLFSSL_MSG("\tNot passed a certificate");
        return NULL;
    }

    if(loc <0 || (loc > wolfSSL_X509_get_ext_count(x509))){
        WOLFSSL_MSG("\tBad location argument");
        return NULL;
    }

    ext = wolfSSL_X509_EXTENSION_new();
    if (ext == NULL) {
        WOLFSSL_MSG("\tX509_EXTENSION_new() failed");
        return NULL;
    }

    rawCert = wolfSSL_X509_get_der((WOLFSSL_X509*)x509, &outSz);
    if (rawCert == NULL) {
        WOLFSSL_MSG("\tX509_get_der() failed");
        wolfSSL_X509_EXTENSION_free(ext);
        return NULL;
    }

    InitDecodedCert( &cert, rawCert, (word32)outSz, 0);

    if (ParseCert(&cert,
#ifdef WOLFSSL_CERT_REQ
            x509->isCSR ? CERTREQ_TYPE :
#endif
                    CA_TYPE,
            NO_VERIFY, NULL) < 0) {
        WOLFSSL_MSG("\tCertificate parsing failed");
        wolfSSL_X509_EXTENSION_free(ext);
        FreeDecodedCert(&cert);
        return NULL;
    }

    input = cert.extensions;
    sz = cert.extensionsSz;

    if (input == NULL || sz == 0) {
        WOLFSSL_MSG("\tfail: should be an EXTENSIONS");
        wolfSSL_X509_EXTENSION_free(ext);
        FreeDecodedCert(&cert);
        return NULL;
    }

#ifdef WOLFSSL_CERT_REQ
    if (!x509->isCSR)
#endif
    {
        if (input[idx++] != ASN_EXTENSIONS) {
            WOLFSSL_MSG("\tfail: should be an EXTENSIONS");
            wolfSSL_X509_EXTENSION_free(ext);
            FreeDecodedCert(&cert);
            return NULL;
        }

        if (GetLength(input, &idx, &length, sz) < 0) {
            WOLFSSL_MSG("\tfail: invalid length");
            wolfSSL_X509_EXTENSION_free(ext);
            FreeDecodedCert(&cert);
            return NULL;
        }
    }

    if (GetSequence(input, &idx, &length, sz) < 0) {
        WOLFSSL_MSG("\tfail: should be a SEQUENCE (1)");
        wolfSSL_X509_EXTENSION_free(ext);
        FreeDecodedCert(&cert);
        return NULL;
    }

    while (idx < (word32)sz) {
        oid = 0;

        if (GetSequence(input, &idx, &length, sz) < 0) {
            WOLFSSL_MSG("\tfail: should be a SEQUENCE");
            wolfSSL_X509_EXTENSION_free(ext);
            FreeDecodedCert(&cert);
            return NULL;
        }

        tmpIdx = idx;
        ret = GetObjectId(input, &idx, &oid, oidCertExtType, sz);
        if (ret < 0) {
            WOLFSSL_MSG("\tfail: OBJECT ID");
            wolfSSL_X509_EXTENSION_free(ext);
            FreeDecodedCert(&cert);
            return NULL;
        }
        idx = tmpIdx;

        /* Continue while loop until extCount == loc or idx > sz */
        if (extCount != loc) {
            idx += length;
            extCount++;
            continue;
        }
        /* extCount == loc. Now get the extension. */
        /* Check if extension has been set */
        isSet = wolfSSL_X509_ext_isSet_by_NID((WOLFSSL_X509*)x509, oid);
        ext->obj = wolfSSL_OBJ_nid2obj(oid);
        if (ext->obj == NULL) {
            WOLFSSL_MSG("\tfail: Invalid OBJECT");
            wolfSSL_X509_EXTENSION_free(ext);
            FreeDecodedCert(&cert);
            return NULL;
        }
        ext->obj->nid = oid;

        switch (oid) {
            case BASIC_CA_OID:
                if (!isSet)
                    break;
                /* Set pathlength */
                a = wolfSSL_ASN1_INTEGER_new();
                if (a == NULL) {
                    wolfSSL_X509_EXTENSION_free(ext);
                    FreeDecodedCert(&cert);
                    return NULL;
                }
                a->length = x509->pathLength;

                /* Save ASN1_INTEGER in x509 extension */
                ext->obj->pathlen = a;

                ext->obj->ca = x509->isCa;
                ext->crit = x509->basicConstCrit;
                break;

            case AUTH_INFO_OID:
                if (!isSet)
                    break;

                /* Create a stack to hold both the caIssuer and ocsp objects
                    in X509_EXTENSION structure */
                sk = (WOLF_STACK_OF(WOLFSSL_ASN1_OBJECT)*)XMALLOC(
                            sizeof(WOLF_STACK_OF(WOLFSSL_ASN1_OBJECT)),
                            NULL, DYNAMIC_TYPE_ASN1);
                if (sk == NULL) {
                    WOLFSSL_MSG("Failed to malloc stack");
                    wolfSSL_X509_EXTENSION_free(ext);
                    FreeDecodedCert(&cert);
                    return NULL;
                }
                XMEMSET(sk, 0, sizeof(WOLF_STACK_OF(WOLFSSL_ASN1_OBJECT)));
                sk->type = STACK_TYPE_OBJ;

                /* Add CaIssuers object to stack */
                if (x509->authInfoCaIssuer != NULL &&
                    x509->authInfoCaIssuerSz > 0)
                {
                    WOLFSSL_ASN1_OBJECT* obj;
                    obj = wolfSSL_ASN1_OBJECT_new();
                    if (obj == NULL) {
                        WOLFSSL_MSG("Error creating ASN1 object");
                        wolfSSL_sk_ASN1_OBJECT_free(sk);
                        wolfSSL_X509_EXTENSION_free(ext);
                        FreeDecodedCert(&cert);
                        return NULL;
                    }
                    obj->obj = (byte*)x509->authInfoCaIssuer;
                    obj->objSz = x509->authInfoCaIssuerSz;
                    obj->grp = oidCertAuthInfoType;
                    obj->nid = AIA_CA_ISSUER_OID;

                    ret = wolfSSL_sk_ASN1_OBJECT_push(sk, obj);
                    if (ret != WOLFSSL_SUCCESS) {
                        WOLFSSL_MSG("Error pushing ASN1 object onto stack");
                        wolfSSL_ASN1_OBJECT_free(obj);
                        wolfSSL_sk_ASN1_OBJECT_free(sk);
                        wolfSSL_X509_EXTENSION_free(ext);
                        FreeDecodedCert(&cert);
                        return NULL;
                    }
                }

                /* Add OCSP object to stack */
                if (x509->authInfo != NULL &&
                    x509->authInfoSz > 0)
                {
                    WOLFSSL_ASN1_OBJECT* obj;
                    obj = wolfSSL_ASN1_OBJECT_new();
                    if (obj == NULL) {
                        WOLFSSL_MSG("Error creating ASN1 object");
                        wolfSSL_sk_ASN1_OBJECT_free(sk);
                        wolfSSL_X509_EXTENSION_free(ext);
                        FreeDecodedCert(&cert);
                        return NULL;
                    }
                    obj->obj = x509->authInfo;
                    obj->objSz = x509->authInfoSz;
                    obj->grp = oidCertAuthInfoType;
                    obj->nid = AIA_OCSP_OID;

                    ret = wolfSSL_sk_ASN1_OBJECT_push(sk, obj);
                    if (ret != WOLFSSL_SUCCESS) {
                        WOLFSSL_MSG("Error pushing ASN1 object onto stack");
                        wolfSSL_ASN1_OBJECT_free(obj);
                        wolfSSL_sk_ASN1_OBJECT_free(sk);
                        wolfSSL_X509_EXTENSION_free(ext);
                        FreeDecodedCert(&cert);
                        return NULL;
                    }
                }
                ext->ext_sk = sk;
                ext->crit = x509->authInfoCrit;
                break;

            case AUTH_KEY_OID:
                if (!isSet)
                    break;

                ret = wolfSSL_ASN1_STRING_set(&ext->value, x509->authKeyId,
                                        x509->authKeyIdSz);
                if (ret != WOLFSSL_SUCCESS) {
                    WOLFSSL_MSG("ASN1_STRING_set() failed");
                    wolfSSL_X509_EXTENSION_free(ext);
                    FreeDecodedCert(&cert);
                    return NULL;
                }
                ext->crit = x509->authKeyIdCrit;
                break;

            case SUBJ_KEY_OID:
                if (!isSet)
                    break;

                ret = wolfSSL_ASN1_STRING_set(&ext->value, x509->subjKeyId,
                                        x509->subjKeyIdSz);
                if (ret != WOLFSSL_SUCCESS) {
                    WOLFSSL_MSG("ASN1_STRING_set() failed");
                    wolfSSL_X509_EXTENSION_free(ext);
                    FreeDecodedCert(&cert);
                    return NULL;
                }
                ext->crit = x509->subjKeyIdCrit;
                break;

            case CERT_POLICY_OID:
                if (!isSet)
                    break;
                ext->crit = x509->certPolicyCrit;
                break;

            case KEY_USAGE_OID:
                if (!isSet)
                    break;

                ret = wolfSSL_ASN1_STRING_set(&ext->value,
                                  (byte*)&(x509->keyUsage), sizeof(word16));
                if (ret != WOLFSSL_SUCCESS) {
                    WOLFSSL_MSG("ASN1_STRING_set() failed");
                    wolfSSL_X509_EXTENSION_free(ext);
                    FreeDecodedCert(&cert);
                    return NULL;
                }
                ext->crit = x509->keyUsageCrit;
                break;

            case EXT_KEY_USAGE_OID:
                if (!isSet)
                    break;
                ext->crit = x509->keyUsageCrit;
                break;

            case CRL_DIST_OID:
                if (!isSet)
                    break;
                ext->crit = x509->CRLdistCrit;
                break;

            case ALT_NAMES_OID:
            {
                WOLFSSL_GENERAL_NAME* gn = NULL;
                DNS_entry* dns = NULL;
                if (!isSet)
                    break;

                sk = (WOLFSSL_GENERAL_NAMES*)XMALLOC(
                          sizeof(WOLFSSL_GENERAL_NAMES), NULL,
                          DYNAMIC_TYPE_ASN1);
                if (sk == NULL) {
                    return NULL;
                }
                XMEMSET(sk, 0, sizeof(WOLFSSL_GENERAL_NAMES));
                sk->type = STACK_TYPE_GEN_NAME;

                if (x509->subjAltNameSet && x509->altNames != NULL) {
                    /* alt names are DNS_entry structs */
                    dns = x509->altNames;
                    /* Currently only support GEN_DNS type */
                    while (dns != NULL) {
                        gn = wolfSSL_GENERAL_NAME_new();
                        if (gn == NULL) {
                            WOLFSSL_MSG("Error creating GENERAL_NAME");
                            wolfSSL_sk_free(sk);
                            return NULL;
                        }

                        gn->type = dns->type;
                        gn->d.ia5->length = dns->len;
                        if (wolfSSL_ASN1_STRING_set(gn->d.ia5, dns->name,
                                    gn->d.ia5->length) != WOLFSSL_SUCCESS) {
                            WOLFSSL_MSG("ASN1_STRING_set failed");
                            wolfSSL_GENERAL_NAME_free(gn);
                            wolfSSL_sk_free(sk);
                            return NULL;
                        }

                        dns = dns->next;
                        /* last dns in list add at end of function */
                        if (dns != NULL) {
                            if (wolfSSL_sk_GENERAL_NAME_push(sk, gn) !=
                                                          WOLFSSL_SUCCESS) {
                            WOLFSSL_MSG("Error pushing onto stack");
                            wolfSSL_GENERAL_NAME_free(gn);
                            wolfSSL_sk_free(sk);
                            sk = NULL;
                            }
                        }
                    }
                    if (wolfSSL_sk_GENERAL_NAME_push(sk,gn) !=
                                                          WOLFSSL_SUCCESS) {
                        WOLFSSL_MSG("Error pushing onto stack");
                        wolfSSL_GENERAL_NAME_free(gn);
                        wolfSSL_sk_free(sk);
                        sk = NULL;
                    }
                }
                ext->ext_sk = sk;
                ext->crit = x509->subjAltNameCrit;
                break;
            }

            default:
                WOLFSSL_MSG("Unknown extension type found, parsing OID");
                /* If the extension type is not recognized/supported,
                    set the ASN1_OBJECT in the extension with the
                    parsed oid for access in later function calls */

                /* Get OID from input */
                if (GetASNObjectId(input, &idx, &length, sz) != 0) {
                    WOLFSSL_MSG("Failed to Get ASN Object Id");
                    wolfSSL_X509_EXTENSION_free(ext);
                    FreeDecodedCert(&cert);
                    return NULL;
                }
                oidBuf = (byte*)XMALLOC(length+1+MAX_LENGTH_SZ, NULL,
                                    DYNAMIC_TYPE_TMP_BUFFER);
                if (oidBuf == NULL) {
                    WOLFSSL_MSG("Failed to malloc tmp buffer");
                    wolfSSL_X509_EXTENSION_free(ext);
                    FreeDecodedCert(&cert);
                    return NULL;
                }
                oidBuf[0] = ASN_OBJECT_ID;
                objSz++;
                objSz += SetLength(length, oidBuf + 1);
                objSz += length;

                /* Set object size and reallocate space in object buffer */
                ext->obj->objSz = objSz;
                if(((ext->obj->dynamic & WOLFSSL_ASN1_DYNAMIC_DATA) != 0) ||
                   (ext->obj->obj == NULL)) {
                        ext->obj->obj =(byte*)XREALLOC((byte*)ext->obj->obj,
                                             ext->obj->objSz,
                                             NULL,DYNAMIC_TYPE_ASN1);
                    if (ext->obj->obj == NULL) {
                        wolfSSL_ASN1_OBJECT_free(ext->obj);
                        wolfSSL_X509_EXTENSION_free(ext);
                        FreeDecodedCert(&cert);
                        XFREE(oidBuf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                        return NULL;
                    }
                    ext->obj->dynamic |= WOLFSSL_ASN1_DYNAMIC_DATA;
                } else {
                    ext->obj->dynamic &= ~WOLFSSL_ASN1_DYNAMIC_DATA;
                }
                /* Get OID from input and copy to ASN1_OBJECT buffer */
                XMEMCPY(oidBuf+2, input+idx, length);
                XMEMCPY((byte*)ext->obj->obj, oidBuf, ext->obj->objSz);
                XFREE(oidBuf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                oidBuf = NULL;
                ext->obj->grp = oidCertExtType;
                ext->crit = 0;

                /* Get extension data and copy as ASN1_STRING */
                tmpIdx = idx + length;
                if ((tmpIdx >= (word32)sz) || (input[tmpIdx++] != ASN_OCTET_STRING)) {
                    WOLFSSL_MSG("Error decoding unknown extension data");
                    wolfSSL_ASN1_OBJECT_free(ext->obj);
                    wolfSSL_X509_EXTENSION_free(ext);
                    FreeDecodedCert(&cert);
                    return NULL;
                }

                if (GetLength(input, &tmpIdx, &length, sz) <= 0) {
                    WOLFSSL_MSG("Error: Invalid Input Length.");
                    wolfSSL_ASN1_OBJECT_free(ext->obj);
                    wolfSSL_X509_EXTENSION_free(ext);
                    FreeDecodedCert(&cert);
                    return NULL;
                }
                ext->value.data = (char*)XMALLOC(length, NULL, DYNAMIC_TYPE_ASN1);
                ext->value.isDynamic = 1;
                if (ext->value.data == NULL) {
                    WOLFSSL_MSG("Failed to malloc ASN1_STRING data");
                    wolfSSL_X509_EXTENSION_free(ext);
                    FreeDecodedCert(&cert);
                    return NULL;
                }
                XMEMCPY(ext->value.data,input+tmpIdx,length);
                ext->value.length = length;
        } /* switch(oid) */

        break; /* Got the Extension. Now exit while loop. */

    } /* while(idx < sz) */

    /* Store the new extension in a stack inside x509
     * The extensions on the stack are free'd internally when FreeX509 is called
     */
    if (x509->ext_sk == NULL)
        x509->ext_sk = wolfSSL_sk_new_x509_ext();
    if (x509->ext_sk != NULL)
        wolfSSL_sk_X509_EXTENSION_push(x509->ext_sk, ext);

    FreeDecodedCert(&cert);
    return ext;
}

/**
 * @param str String to copy
 * @param buf Output buffer. If this contains a pointer then it is free'd
 *            with the DYNAMIC_TYPE_X509_EXT hint.
 * @param len Output length
 * @return WOLFSSL_SUCCESS on sucess and WOLFSSL_FAILURE on error
 */
static int asn1_string_copy_to_buffer(WOLFSSL_ASN1_STRING* str, byte** buf,
        word32* len, void* heap) {
    if (!str || !buf || !len) {
        return WOLFSSL_FAILURE;
    }
    if (str->data && str->length > 0) {
        if (*buf)
            XFREE(*buf, heap, DYNAMIC_TYPE_X509_EXT);
        *len = 0;
        *buf = (byte*)XMALLOC(str->length, heap,
                DYNAMIC_TYPE_X509_EXT);
        if (!*buf) {
            WOLFSSL_MSG("malloc error");
            return WOLFSSL_FAILURE;
        }
        *len = str->length;
        XMEMCPY(*buf, str->data, str->length);
    }

    (void)heap;
    return WOLFSSL_SUCCESS;
}

int wolfSSL_X509_add_ext(WOLFSSL_X509 *x509, WOLFSSL_X509_EXTENSION *ext, int loc)
{
    WOLFSSL_ENTER("wolfSSL_X509_add_ext");

    if (!x509 || !ext || !ext->obj || loc >= 0) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    switch (ext->obj->type) {
    case NID_authority_key_identifier:
        if (asn1_string_copy_to_buffer(&ext->value, &x509->authKeyId,
                &x509->authKeyIdSz, x509->heap) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("asn1_string_copy_to_buffer error");
            return WOLFSSL_FAILURE;
        }
        x509->authKeyIdCrit = ext->crit;
        break;
    case NID_subject_key_identifier:
        if (asn1_string_copy_to_buffer(&ext->value, &x509->subjKeyId,
                &x509->subjKeyIdSz, x509->heap) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("asn1_string_copy_to_buffer error");
            return WOLFSSL_FAILURE;
        }
        x509->subjKeyIdCrit = ext->crit;
        break;
    case NID_subject_alt_name:
    {
        WOLFSSL_GENERAL_NAMES* gns = ext->ext_sk;
        while (gns) {
            WOLFSSL_GENERAL_NAME* gn = gns->data.gn;
            if (!gn || !gn->d.ia5 ||
                wolfSSL_X509_add_altname_ex(x509, gn->d.ia5->data,
                    gn->d.ia5->length, gn->type) != WOLFSSL_SUCCESS) {
                WOLFSSL_MSG("Subject alternative name missing extension");
                return WOLFSSL_FAILURE;
            }
            gns = gns->next;
        }
        x509->subjAltNameSet = 1;
        x509->subjAltNameCrit = ext->crit;
        break;
    }
    case NID_key_usage:
        if (ext && ext->value.data &&
                ext->value.length == sizeof(word16)) {
            x509->keyUsage = *(word16*)ext->value.data;
            x509->keyUsageCrit = ext->crit;
            x509->keyUsageSet = 1;
        }
        break;
    case NID_basic_constraints:
        if (ext->obj) {
            x509->isCa = ext->obj->ca;
            x509->basicConstCrit = ext->crit;
            if (ext->obj->pathlen)
                x509->pathLength = ext->obj->pathlen->length;
            x509->basicConstSet = 1;
        }
        break;
    default:
        WOLFSSL_MSG("Unsupported extension to add");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

#ifndef NO_BIO
/* Return 0 on success and 1 on failure. Copies ext data to bio, using indent
 *  to pad the output. flag is ignored. */
int wolfSSL_X509V3_EXT_print(WOLFSSL_BIO *out, WOLFSSL_X509_EXTENSION *ext,
        unsigned long flag, int indent)
{
    ASN1_OBJECT* obj;
    ASN1_STRING* str;
    int nid;
    const int sz = CTC_NAME_SIZE*2;
    int rc = WOLFSSL_FAILURE;
    char tmp[CTC_NAME_SIZE*2 + 1] = {0};
    WOLFSSL_ENTER("wolfSSL_X509V3_EXT_print");

    if ((out == NULL) || (ext == NULL)) {
        WOLFSSL_MSG("NULL parameter error");
        return rc;
    }

    obj = wolfSSL_X509_EXTENSION_get_object(ext);
    if (obj == NULL) {
        WOLFSSL_MSG("Error getting ASN1_OBJECT from X509_EXTENSION");
        return rc;
    }

    str = wolfSSL_X509_EXTENSION_get_data(ext);
    if (str == NULL) {
        WOLFSSL_MSG("Error getting ASN1_STRING from X509_EXTENSION");
        return rc;
    }

    /* Print extension based on the type */
    nid = wolfSSL_OBJ_obj2nid(obj);
    switch (nid) {
        case BASIC_CA_OID:
        {
            char isCa[] = "TRUE";
            char notCa[] = "FALSE";
            XSNPRINTF(tmp, sz, "%*sCA:%s", indent, "",
                                                    obj->ca ? isCa : notCa);
            break;
        }
        case ALT_NAMES_OID:
        {
            WOLFSSL_STACK* sk;
            char* val;
            int len;
            tmp[0] = '\0'; /* Make sure tmp is null-terminated */

            sk = ext->ext_sk;
            while (sk != NULL) {
                if (sk->type == STACK_TYPE_GEN_NAME && sk->data.gn) {
                    /* str is GENERAL_NAME for subject alternative name ext */
                    str = sk->data.gn->d.ia5;
                    len = str->length + 2; /* + 2 for NULL char and "," */
                    if (len > sz) {
                        WOLFSSL_MSG("len greater than buffer size");
                        return rc;
                    }

                    val = (char*)XMALLOC(len + indent, NULL,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
                    if (val == NULL) {
                        WOLFSSL_MSG("Memory error");
                        return rc;
                    }
                    if (sk->next)
                        XSNPRINTF(val, len, "%*s%s,", indent, "", str->strData);
                    else
                        XSNPRINTF(val, len, "%*s%s", indent, "", str->strData);

                    XSTRNCAT(tmp, val, len);
                    XFREE(val, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                }
                sk = sk->next;
            }
            break;
        }
        case AUTH_KEY_OID:
        case SUBJ_KEY_OID:
        {
            char* asn1str;
            asn1str = wolfSSL_i2s_ASN1_STRING(NULL, str);
            XSNPRINTF(tmp, sz, "%*s%s", indent, "", asn1str);
            XFREE(asn1str, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            break;
        }
        case AUTH_INFO_OID:
        case CERT_POLICY_OID:
        case CRL_DIST_OID:
        case KEY_USAGE_OID:
            WOLFSSL_MSG("X509V3_EXT_print not yet implemented for ext type");
            break;

        default:
            XSNPRINTF(tmp, sz, "%*s%s", indent, "", str->strData);
    }

    if (wolfSSL_BIO_write(out, tmp, (int)XSTRLEN(tmp)) == (int)XSTRLEN(tmp)) {
        rc = WOLFSSL_SUCCESS;
    }
    (void) flag;

    return rc;
}
#endif /* !NO_BIO */

#ifndef NO_WOLFSSL_STUB
int wolfSSL_X509V3_EXT_add_nconf(WOLFSSL_CONF *conf, WOLFSSL_X509V3_CTX *ctx,
        const char *section, WOLFSSL_X509 *cert)
{
    WOLFSSL_ENTER("wolfSSL_X509V3_EXT_add_nconf");
    WOLFSSL_STUB("wolfSSL_X509V3_EXT_add_nconf");
    (void)conf;
    (void)ctx;
    (void)section;
    (void)cert;
    return WOLFSSL_SUCCESS;
}
#endif

/* Returns crit flag in X509_EXTENSION object */
int wolfSSL_X509_EXTENSION_get_critical(const WOLFSSL_X509_EXTENSION* ex)
{
    WOLFSSL_ENTER("wolfSSL_X509_EXTENSION_get_critical");
    if (ex == NULL)
        return BAD_FUNC_ARG;
    return ex->crit;
}

/* Creates v3_ext_method for a given X509v3 extension
 *
 * ex   : The X509_EXTENSION used to create v3_ext_method. If the extension is
 * not NULL, get the NID of the extension object and populate the
 * extension type-specific X509V3_EXT_* function(s) in v3_ext_method.
 *
 * Returns NULL on error or pointer to the v3_ext_method populated with extension
 * type-specific X509V3_EXT_* function(s).
 *
 * NOTE: NID_subject_key_identifier is currently the only extension implementing
 * the X509V3_EXT_* functions, as it is the only type called directly by QT. The
 * other extension types return a pointer to a v3_ext_method struct that contains
 * only the NID.
 */
const WOLFSSL_v3_ext_method* wolfSSL_X509V3_EXT_get(WOLFSSL_X509_EXTENSION* ex)
{
    int nid;
    WOLFSSL_v3_ext_method method;

    WOLFSSL_ENTER("wolfSSL_X509V3_EXT_get");
    if ((ex == NULL) || (ex->obj == NULL)) {
        WOLFSSL_MSG("Passed an invalid X509_EXTENSION*");
        return NULL;
    }
    /* Initialize method to 0 */
    XMEMSET(&method, 0, sizeof(struct WOLFSSL_v3_ext_method));

    nid = ex->obj->nid;
    if (nid <= 0) {
        WOLFSSL_MSG("Failed to get nid from passed extension object");
        return NULL;
    }
    XMEMSET(&method, 0, sizeof(WOLFSSL_v3_ext_method));
    switch (nid) {
        case NID_basic_constraints:
            break;
        case NID_subject_key_identifier:
            method.i2s = (X509V3_EXT_I2S)wolfSSL_i2s_ASN1_STRING;
            break;
        case NID_subject_alt_name:
            WOLFSSL_MSG("i2v function not yet implemented for Subject Alternative Name");
            break;
        case NID_key_usage:
            WOLFSSL_MSG("i2v function not yet implemented for Key Usage");
            break;
        case NID_authority_key_identifier:
            WOLFSSL_MSG("i2v function not yet implemented for Auth Key Id");
            break;
        case NID_info_access:
            WOLFSSL_MSG("i2v function not yet implemented for Info Access");
            break;
        case NID_ext_key_usage:
            WOLFSSL_MSG("i2v function not yet implemented for Ext Key Usage");
            break;
        case NID_certificate_policies:
            WOLFSSL_MSG("r2i function not yet implemented for Cert Policies");
            break;
        case NID_crl_distribution_points:
            WOLFSSL_MSG("r2i function not yet implemented for CRL Dist Points");
            break;
        default:
            /* If extension type is unknown, return NULL -- QT makes call to
                X509_EXTENSION_get_data() if there is no v3_ext_method */
            WOLFSSL_MSG("X509V3_EXT_get(): Unknown extension type found");
            return NULL;
    }

    method.ext_nid = nid;
    ex->ext_method = method;

    return (const WOLFSSL_v3_ext_method*)&ex->ext_method;
}

/* Parses and returns an x509v3 extension internal structure.
 *
 * ext   : The X509_EXTENSION for parsing internal structure. If extension is
 * not NULL, get the NID of the extension object and create a new
 * extension-specific internal structure based on the extension type.
 *
 * Returns NULL on error or if NID is not found, otherwise returns a pointer to
 * the extension type-specific X509_EXTENSION internal structure.
 * Return is expected to be free'd by caller.
 */
void* wolfSSL_X509V3_EXT_d2i(WOLFSSL_X509_EXTENSION* ext)
{
    const WOLFSSL_v3_ext_method* method;
    int ret;
    WOLFSSL_ASN1_OBJECT* object;
    WOLFSSL_BASIC_CONSTRAINTS* bc;
    WOLFSSL_AUTHORITY_KEYID* akey;
    WOLFSSL_ASN1_STRING* asn1String, *newString;
    WOLFSSL_AUTHORITY_INFO_ACCESS* aia;
    WOLFSSL_STACK* sk;

    WOLFSSL_ENTER("wolfSSL_X509V3_EXT_d2i");

    if(ext == NULL) {
        WOLFSSL_MSG("Bad function Argument");
        return NULL;
    }

    /* extract extension info */
    method = wolfSSL_X509V3_EXT_get(ext);
    if (method == NULL) {
        WOLFSSL_MSG("wolfSSL_X509V3_EXT_get error");
        return NULL;
    }
    object = wolfSSL_X509_EXTENSION_get_object(ext);
    if (object == NULL) {
        WOLFSSL_MSG("X509_EXTENSION_get_object failed");
        return NULL;
    }

    /* Return pointer to proper internal structure based on NID */
    switch (object->type) {
        /* basicConstraints */
        case (NID_basic_constraints):
            WOLFSSL_MSG("basicConstraints");
            /* Allocate new BASIC_CONSTRAINTS structure */
            bc = wolfSSL_BASIC_CONSTRAINTS_new();
            if (bc == NULL) {
                WOLFSSL_MSG("Failed to malloc basic constraints");
                return NULL;
            }
            /* Copy pathlen and CA into BASIC_CONSTRAINTS from object */
            bc->ca = object->ca;
            if (object->pathlen->length > 0) {
                bc->pathlen = wolfSSL_ASN1_INTEGER_dup(object->pathlen);
                if (bc->pathlen == NULL) {
                    WOLFSSL_MSG("Failed to duplicate ASN1_INTEGER");
                    wolfSSL_BASIC_CONSTRAINTS_free(bc);
                    return NULL;
                }
            }
            else
                bc->pathlen = NULL;
            return bc;

        /* subjectKeyIdentifier */
        case (NID_subject_key_identifier):
            WOLFSSL_MSG("subjectKeyIdentifier");
            asn1String = wolfSSL_X509_EXTENSION_get_data(ext);
            if (asn1String == NULL) {
                WOLFSSL_MSG("X509_EXTENSION_get_data() failed");
                return NULL;
            }
            newString = wolfSSL_ASN1_STRING_new();
            if (newString == NULL) {
                WOLFSSL_MSG("Failed to malloc ASN1_STRING");
                return NULL;
            }
            ret = wolfSSL_ASN1_STRING_set(newString, asn1String->data,
                                                            asn1String->length);
            if (ret != WOLFSSL_SUCCESS) {
                WOLFSSL_MSG("ASN1_STRING_set() failed");
                wolfSSL_ASN1_STRING_free(newString);
                return NULL;
            };
            newString->type = asn1String->type;
            return newString;

        /* authorityKeyIdentifier */
        case (NID_authority_key_identifier):
            WOLFSSL_MSG("AuthorityKeyIdentifier");

            akey = (WOLFSSL_AUTHORITY_KEYID*)
                    XMALLOC(sizeof(WOLFSSL_AUTHORITY_KEYID), NULL,
                    DYNAMIC_TYPE_X509_EXT);
            if (akey == NULL) {
                WOLFSSL_MSG("Failed to malloc authority key id");
                return NULL;
            }
            
            XMEMSET(akey, 0, sizeof(WOLFSSL_AUTHORITY_KEYID));

            akey->keyid = wolfSSL_ASN1_STRING_new();
            if (akey->keyid == NULL) {
                WOLFSSL_MSG("ASN1_STRING_new() failed");
                wolfSSL_AUTHORITY_KEYID_free(akey);
                return NULL;
            }

            asn1String = wolfSSL_X509_EXTENSION_get_data(ext);
            if (asn1String == NULL) {
                WOLFSSL_MSG("X509_EXTENSION_get_data() failed");
                wolfSSL_AUTHORITY_KEYID_free(akey);
                return NULL;
            }

            ret = wolfSSL_ASN1_STRING_set(akey->keyid, asn1String->data,
                                                            asn1String->length);
            if (ret != WOLFSSL_SUCCESS) {
                WOLFSSL_MSG("ASN1_STRING_set() failed");
                wolfSSL_AUTHORITY_KEYID_free(akey);
                return NULL;
            };
            akey->keyid->type   = asn1String->type;

            /* For now, set issuer and serial to NULL. This may need to be
                updated for future use */
            akey->issuer = NULL;
            akey->serial = NULL;
            return akey;

        /* keyUsage */
        case (NID_key_usage):
            WOLFSSL_MSG("keyUsage");
            /* This may need to be updated for future use. The i2v method for
                keyUsage is not currently set. For now, return the ASN1_STRING
                representation of KeyUsage bit string */
            asn1String = wolfSSL_X509_EXTENSION_get_data(ext);
            if (asn1String == NULL) {
                WOLFSSL_MSG("X509_EXTENSION_get_data() failed");
                return NULL;
            }
            newString = wolfSSL_ASN1_STRING_new();
            if (newString == NULL) {
                WOLFSSL_MSG("Failed to malloc ASN1_STRING");
                return NULL;
            }
            ret = wolfSSL_ASN1_STRING_set(newString, asn1String->data,
                                                            asn1String->length);
            if (ret != WOLFSSL_SUCCESS) {
                WOLFSSL_MSG("ASN1_STRING_set() failed");
                wolfSSL_ASN1_STRING_free(newString);
                return NULL;
            };
            newString->type = asn1String->type;
            return newString;

        /* extKeyUsage */
        case (NID_ext_key_usage):
            WOLFSSL_MSG("extKeyUsage not supported yet");
            return NULL;

        /* certificatePolicies */
        case (NID_certificate_policies):
            WOLFSSL_MSG("certificatePolicies not supported yet");
            return NULL;

        /* cRLDistributionPoints */
        case (NID_crl_distribution_points):
            WOLFSSL_MSG("cRLDistributionPoints not supported yet");
            return NULL;

        /* authorityInfoAccess */
        case (NID_info_access):
            WOLFSSL_MSG("AuthorityInfoAccess");

            sk = ext->ext_sk;
            if (sk == NULL) {
                WOLFSSL_MSG("ACCESS_DESCRIPTION stack NULL");
                return NULL;
            }

            /* AUTHORITY_INFO_ACCESS is a stack of ACCESS_DESCRIPTION entries */
            aia = wolfSSL_sk_new_null();
            if (aia == NULL) {
                WOLFSSL_MSG("Failed to malloc AUTHORITY_INFO_ACCESS");
                return NULL;
            }
            aia->type = STACK_TYPE_ACCESS_DESCRIPTION;

            while (sk) {
                WOLFSSL_ACCESS_DESCRIPTION* ad;
                WOLFSSL_ASN1_OBJECT* aiaEntry;

                if (sk->type != STACK_TYPE_OBJ) {
                    sk = sk->next;
                    continue;
                }

                aiaEntry = sk->data.obj;

                /* ACCESS_DESCRIPTION has two members, method and location.
                Method: ASN1_OBJECT as either AIA_OCSP_OID or AIA_CA_ISSUER_OID
                Location: GENERAL_NAME structure containing the URI. */

                ad = (WOLFSSL_ACCESS_DESCRIPTION*)
                        XMALLOC(sizeof(WOLFSSL_ACCESS_DESCRIPTION), NULL,
                        DYNAMIC_TYPE_X509_EXT);
                if (ad == NULL) {
                    WOLFSSL_MSG("Failed to malloc ACCESS_DESCRIPTION");
                    XFREE(aia, NULL, DYNAMIC_TYPE_X509_EXT);
                    return NULL;
                }
                XMEMSET(ad, 0, sizeof(WOLFSSL_ACCESS_DESCRIPTION));

                /* Create new ASN1_OBJECT from oid */
                ad->method = wolfSSL_OBJ_nid2obj(aiaEntry->nid);
                if (ad->method == NULL) {
                    WOLFSSL_MSG("OBJ_nid2obj() failed");
                    XFREE(aia, NULL, DYNAMIC_TYPE_X509_EXT);
                    XFREE(ad, NULL, DYNAMIC_TYPE_X509_EXT);
                    return NULL;
                }

                /* Allocate memory for GENERAL NAME */
                ad->location = (WOLFSSL_GENERAL_NAME*)
                                XMALLOC(sizeof(WOLFSSL_GENERAL_NAME), NULL,
                                DYNAMIC_TYPE_OPENSSL);
                if (ad->location == NULL) {
                    WOLFSSL_MSG("Failed to malloc GENERAL_NAME");
                    wolfSSL_ASN1_OBJECT_free(ad->method);
                    XFREE(aia, NULL, DYNAMIC_TYPE_X509_EXT);
                    XFREE(ad, NULL, DYNAMIC_TYPE_X509_EXT);
                    return NULL;
                }
                XMEMSET(ad->location, 0, sizeof(WOLFSSL_GENERAL_NAME));
                ad->location->type = GEN_URI;
                ad->location->d.uniformResourceIdentifier =
                                    wolfSSL_ASN1_STRING_new();
                /* Set the URI in GENERAL_NAME */
                ret = wolfSSL_ASN1_STRING_set(
                                    ad->location->d.uniformResourceIdentifier,
                                    aiaEntry->obj, aiaEntry->objSz);
                if (ret != WOLFSSL_SUCCESS) {
                    WOLFSSL_MSG("ASN1_STRING_set() failed");
                    wolfSSL_ASN1_OBJECT_free(ad->method);
                    XFREE(aia, NULL, DYNAMIC_TYPE_X509_EXT);
                    XFREE(ad->location, NULL, DYNAMIC_TYPE_OPENSSL);
                    XFREE(ad, NULL, DYNAMIC_TYPE_X509_EXT);
                    return NULL;
                }
                /* Push to AUTHORITY_INFO_ACCESS stack */
                ret = wolfSSL_sk_ACCESS_DESCRIPTION_push(aia, ad);
                if (ret != WOLFSSL_SUCCESS) {
                    WOLFSSL_MSG("Error pushing ASN1 AD onto stack");
                    wolfSSL_sk_ACCESS_DESCRIPTION_pop_free(aia, NULL);
                    wolfSSL_ASN1_OBJECT_free(ad->method);
                    XFREE(aia, NULL, DYNAMIC_TYPE_X509_EXT);
                    XFREE(ad, NULL, DYNAMIC_TYPE_X509_EXT);
                    return NULL;
                }

                sk = sk->next;
            }
            return aia;

        default:
            WOLFSSL_MSG("Extension NID not in table, returning NULL");
            break;
    }
    return NULL;
}

/* Looks for the extension matching the passed in nid
 *
 * x509 : certificate to get parse through for extension.
 * nid : Extension OID to be found.
 * lastPos : Start search from extension after lastPos.
 *           Set to -1 to search from index 0.
 * return >= 0 If successful the extension index is returned.
 * return -1 If extension is not found or error is encountered.
 */
int wolfSSL_X509_get_ext_by_NID(const WOLFSSL_X509* x509, int nid, int lastPos)
{
    int extCount = 0, length = 0, outSz = 0, sz = 0, ret = 0;
    int isSet = 0, found = 0, loc;
    const byte* rawCert;
    const byte* input;
    word32 oid, idx = 0, tmpIdx = 0;
    DecodedCert cert;

    WOLFSSL_ENTER("wolfSSL_X509_get_ext_by_NID");

    if(x509 == NULL){
        WOLFSSL_MSG("\tNot passed a certificate");
        return WOLFSSL_FATAL_ERROR;
    }

    if(lastPos < -1 || (lastPos > (wolfSSL_X509_get_ext_count(x509) - 1))){
        WOLFSSL_MSG("\tBad location argument");
        return WOLFSSL_FATAL_ERROR;
    }

    loc = lastPos + 1;

    rawCert = wolfSSL_X509_get_der((WOLFSSL_X509*)x509, &outSz);
    if (rawCert == NULL) {
        WOLFSSL_MSG("\tX509_get_der() failed");
        return WOLFSSL_FATAL_ERROR;
    }

    InitDecodedCert( &cert, rawCert, (word32)outSz, 0);

    if (ParseCert(&cert,
#ifdef WOLFSSL_CERT_REQ
            x509->isCSR ? CERTREQ_TYPE :
#endif
            CA_TYPE,
            NO_VERIFY, NULL) < 0) {
        WOLFSSL_MSG("\tCertificate parsing failed");
        FreeDecodedCert(&cert);
        return WOLFSSL_FATAL_ERROR;
    }

    input = cert.extensions;
    sz = cert.extensionsSz;

    if (input == NULL || sz == 0) {
        WOLFSSL_MSG("\tfail: should be an EXTENSIONS");
        FreeDecodedCert(&cert);
        return WOLFSSL_FATAL_ERROR;
    }

#ifdef WOLFSSL_CERT_REQ
    if (!x509->isCSR)
#endif
    {
        if (input[idx++] != ASN_EXTENSIONS) {
            WOLFSSL_MSG("\tfail: should be an EXTENSIONS");
            FreeDecodedCert(&cert);
            return WOLFSSL_FATAL_ERROR;
        }

        if (GetLength(input, &idx, &length, sz) < 0) {
            WOLFSSL_MSG("\tfail: invalid length");
            FreeDecodedCert(&cert);
            return WOLFSSL_FATAL_ERROR;
        }
    }

    if (GetSequence(input, &idx, &length, sz) < 0) {
        WOLFSSL_MSG("\tfail: should be a SEQUENCE (1)");
        FreeDecodedCert(&cert);
        return WOLFSSL_FATAL_ERROR;
    }

    while (idx < (word32)sz) {
        oid = 0;

        if (GetSequence(input, &idx, &length, sz) < 0) {
            WOLFSSL_MSG("\tfail: should be a SEQUENCE");
            FreeDecodedCert(&cert);
            return WOLFSSL_FATAL_ERROR;
        }

        tmpIdx = idx;
        ret = GetObjectId(input, &idx, &oid, oidCertExtType, sz);
        if (ret < 0) {
            WOLFSSL_MSG("\tfail: OBJECT ID");
            FreeDecodedCert(&cert);
            return WOLFSSL_FATAL_ERROR;
        }
        idx = tmpIdx;

        if (extCount >= loc) {
            /* extCount >= loc. Now check if extension has been set */
            isSet = wolfSSL_X509_ext_isSet_by_NID((WOLFSSL_X509*)x509, oid);

            if (isSet && ((word32)nid == oid)) {
                found = 1;
                break;
            }
        }

        idx += length;
        extCount++;
    } /* while(idx < sz) */

    FreeDecodedCert(&cert);

    return found ? extCount : WOLFSSL_FATAL_ERROR;
}


#endif /* OPENSSL_ALL */

#endif /* !NO_CERTS */
#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)

WOLFSSL_ASN1_BIT_STRING* wolfSSL_ASN1_BIT_STRING_new(void)
{
    WOLFSSL_ASN1_BIT_STRING* str;

    str = (WOLFSSL_ASN1_BIT_STRING*)XMALLOC(sizeof(WOLFSSL_ASN1_BIT_STRING),
                                                  NULL, DYNAMIC_TYPE_OPENSSL);
    if (str) {
        XMEMSET(str, 0, sizeof(WOLFSSL_ASN1_BIT_STRING));
    }
    return str;
}

void wolfSSL_ASN1_BIT_STRING_free(WOLFSSL_ASN1_BIT_STRING* str)
{
    if (str) {
        if (str->data) {
            XFREE(str->data, NULL, DYNAMIC_TYPE_OPENSSL);
            str->data = NULL;
        }
        XFREE(str, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}

int wolfSSL_ASN1_BIT_STRING_get_bit(const WOLFSSL_ASN1_BIT_STRING* str, int i)
{
    if (!str || !str->data || str->length <= (i/8) || i < 0) {
        return WOLFSSL_FAILURE;
    }

    return (str->data[i/8] & (1<<(7-(i%8)))) ? 1 : 0;
}

/* Looks for the extension matching the passed in nid
 *
 * c   : if not null then is set to status value -2 if multiple occurrences
 *       of the extension are found, -1 if not found, 0 if found and not
 *       critical, and 1 if found and critical.
 * nid : Extension OID to be found.
 * idx : if NULL return first extension found match, otherwise start search at
 *       idx location and set idx to the location of extension returned.
 * returns NULL or a pointer to an WOLFSSL_ASN1_BIT_STRING (for KEY_USAGE_OID)
 * or WOLFSSL_STACK (for other)
 * holding extension structure
 *
 * NOTE code for decoding extensions is in asn.c DecodeCertExtensions --
 * use already decoded extension in this function to avoid decoding twice.
 * Currently we do not make use of idx since getting pre decoded extensions.
 */
void* wolfSSL_X509_get_ext_d2i(const WOLFSSL_X509* x509, int nid, int* c,
    int* idx)
{
    void* ret = NULL;
    WOLFSSL_STACK* sk = NULL;
    WOLFSSL_ASN1_OBJECT* obj = NULL;
    WOLFSSL_GENERAL_NAME* gn = NULL;
    WOLFSSL_BASIC_CONSTRAINTS* bc = NULL;

    WOLFSSL_ENTER("wolfSSL_X509_get_ext_d2i");

    if (x509 == NULL) {
        return NULL;
    }

    if (c != NULL) {
        *c = -1; /* default to not found */
    }

    switch (nid) {
        case BASIC_CA_OID:
            if (x509->basicConstSet) {
                WOLFSSL_ASN1_INTEGER* a;

                bc = wolfSSL_BASIC_CONSTRAINTS_new();
                if (!bc) {
                    WOLFSSL_MSG("wolfSSL_BASIC_CONSTRAINTS_new error");
                    return NULL;
                }

                a = wolfSSL_ASN1_INTEGER_new();
                if (!a) {
                    WOLFSSL_MSG("wolfSSL_ASN1_INTEGER_new error");
                    wolfSSL_BASIC_CONSTRAINTS_free(bc);
                    return NULL;
                }
                a->length = x509->pathLength;

#if defined(OPENSSL_ALL) || defined(WOLFSSL_QT) || \
        defined(WOLFSSL_APACHE_HTTPD)
                bc->ca = x509->isCa;
#endif
                bc->pathlen = a;
                if (c != NULL) {
                    *c = x509->basicConstCrit;
                }
            }
            else {
                WOLFSSL_MSG("No Basic Constraint set");
            }
            return bc;

        case ALT_NAMES_OID:
        {
            DNS_entry* dns = NULL;
            /* Malloc GENERAL_NAME stack */
            sk = (WOLFSSL_GENERAL_NAMES*)XMALLOC(
                        sizeof(WOLFSSL_GENERAL_NAMES), NULL,
                                                         DYNAMIC_TYPE_ASN1);
            if (sk == NULL) {
                return NULL;
            }
            XMEMSET(sk, 0, sizeof(WOLFSSL_GENERAL_NAMES));
            sk->type = STACK_TYPE_GEN_NAME;

            if (x509->subjAltNameSet && x509->altNames != NULL) {
                /* alt names are DNS_entry structs */
                if (c != NULL) {
                    if (x509->altNames->next != NULL) {
                        *c = -2; /* more then one found */
                    }
                    else {
                        *c = x509->subjAltNameCrit;
                    }
                }

                dns = x509->altNames;
                /* Currently only support GEN_DNS type */
                while (dns != NULL) {
                    gn = wolfSSL_GENERAL_NAME_new();
                    if (gn == NULL) {
                        WOLFSSL_MSG("Error creating GENERAL_NAME");
                        goto err;
                    }

                    gn->type = dns->type;
                    gn->d.ia5->length = dns->len;
                    if (wolfSSL_ASN1_STRING_set(gn->d.ia5, dns->name,
                                gn->d.ia5->length) != WOLFSSL_SUCCESS) {
                        WOLFSSL_MSG("ASN1_STRING_set failed");
                        goto err;
                    }

                    dns = dns->next;
                    if (wolfSSL_sk_GENERAL_NAME_push(sk, gn) !=
                                                      WOLFSSL_SUCCESS) {
                        WOLFSSL_MSG("Error pushing ASN1 object onto stack");
                        goto err;
                    }
                    /* null so that it doesn't get pushed again after switch */
                    gn = NULL;
                }
            }
            else {
                WOLFSSL_MSG("No Alt Names set");
            }

            break;
        }

        case CRL_DIST_OID:
            if (x509->CRLdistSet && x509->CRLInfo != NULL) {
                if (c != NULL) {
                    *c = x509->CRLdistCrit;
                }
                obj = wolfSSL_ASN1_OBJECT_new();
                if (obj == NULL) {
                    WOLFSSL_MSG("Issue creating WOLFSSL_ASN1_OBJECT struct");
                    return NULL;
                }
                obj->type  = CRL_DIST_OID;
                obj->grp   = oidCertExtType;
                obj->obj   = x509->CRLInfo;
                obj->objSz = x509->CRLInfoSz;
            }
            else {
                WOLFSSL_MSG("No CRL dist set");
            }
            break;

        case AUTH_INFO_OID:
            if (x509->authInfoSet && x509->authInfo != NULL) {
                if (c != NULL) {
                    *c = x509->authInfoCrit;
                }
                obj = wolfSSL_ASN1_OBJECT_new();
                if (obj == NULL) {
                    WOLFSSL_MSG("Issue creating WOLFSSL_ASN1_OBJECT struct");
                    return NULL;
                }
                obj->type  = AUTH_INFO_OID;
                obj->grp   = oidCertExtType;
                obj->obj   = x509->authInfo;
                obj->objSz = x509->authInfoSz;
            }
            else {
                WOLFSSL_MSG("No Auth Info set");
            }
            break;

        case AUTH_KEY_OID:
            if (x509->authKeyIdSet) {
                WOLFSSL_AUTHORITY_KEYID* akey = wolfSSL_AUTHORITY_KEYID_new();
                if (!akey) {
                    WOLFSSL_MSG("Issue creating WOLFSSL_AUTHORITY_KEYID struct");
                    return NULL;
                }

                if (c != NULL) {
                    *c = x509->authKeyIdCrit;
                }
                obj = wolfSSL_ASN1_OBJECT_new();
                if (obj == NULL) {
                    WOLFSSL_MSG("Issue creating WOLFSSL_ASN1_OBJECT struct");
                    wolfSSL_AUTHORITY_KEYID_free(akey);
                    return NULL;
                }
                obj->type  = AUTH_KEY_OID;
                obj->grp   = oidCertExtType;
                obj->obj   = x509->authKeyId;
                obj->objSz = x509->authKeyIdSz;
                akey->issuer = obj;
                return akey;
            }
            else {
                WOLFSSL_MSG("No Auth Key set");
            }
            break;

        case SUBJ_KEY_OID:
            if (x509->subjKeyIdSet) {
                if (c != NULL) {
                    *c = x509->subjKeyIdCrit;
                }
                obj = wolfSSL_ASN1_OBJECT_new();
                if (obj == NULL) {
                    WOLFSSL_MSG("Issue creating WOLFSSL_ASN1_OBJECT struct");
                    return NULL;
                }
                obj->type  = SUBJ_KEY_OID;
                obj->grp   = oidCertExtType;
                obj->obj   = x509->subjKeyId;
                obj->objSz = x509->subjKeyIdSz;
            }
            else {
                WOLFSSL_MSG("No Subject Key set");
            }
            break;

        case CERT_POLICY_OID:
        {
        #ifdef WOLFSSL_CERT_EXT
            int i;

            if (x509->certPoliciesNb > 0) {
                if (c != NULL) {
                    if (x509->certPoliciesNb > 1) {
                        *c = -2;
                    }
                    else {
                        *c = 0;
                    }
                }

                sk = wolfSSL_sk_new_asn1_obj();
                if (sk == NULL) {
                    return NULL;
                }

                for (i = 0; i < x509->certPoliciesNb - 1; i++) {
                    obj = wolfSSL_ASN1_OBJECT_new();
                    if (obj == NULL) {
                        WOLFSSL_MSG("Issue creating WOLFSSL_ASN1_OBJECT struct");
                        wolfSSL_sk_ASN1_OBJECT_free(sk);
                        return NULL;
                    }
                    obj->type  = CERT_POLICY_OID;
                    obj->grp   = oidCertExtType;
                    obj->obj   = (byte*)(x509->certPolicies[i]);
                    obj->objSz = MAX_CERTPOL_SZ;
                    if (wolfSSL_sk_ASN1_OBJECT_push(sk, obj)
                                                           != WOLFSSL_SUCCESS) {
                        WOLFSSL_MSG("Error pushing ASN1 object onto stack");
                        wolfSSL_ASN1_OBJECT_free(obj);
                        wolfSSL_sk_ASN1_OBJECT_free(sk);
                        sk = NULL;
                    }
                }
                obj = wolfSSL_ASN1_OBJECT_new();
                if (obj == NULL) {
                    WOLFSSL_MSG("Issue creating WOLFSSL_ASN1_OBJECT struct");
                    wolfSSL_sk_ASN1_OBJECT_free(sk);
                    return NULL;
                }
                obj->type  = CERT_POLICY_OID;
                obj->grp   = oidCertExtType;
                obj->obj   = (byte*)(x509->certPolicies[i]);
                obj->objSz = MAX_CERTPOL_SZ;
            }
            else {
                WOLFSSL_MSG("No Cert Policy set");
            }
        #elif defined(WOLFSSL_SEP)
            if (x509->certPolicySet) {
                if (c != NULL) {
                    *c = x509->certPolicyCrit;
                }
                obj = wolfSSL_ASN1_OBJECT_new();
                if (obj == NULL) {
                    WOLFSSL_MSG("Issue creating WOLFSSL_ASN1_OBJECT struct");
                    return NULL;
                }
                obj->type  = CERT_POLICY_OID;
                obj->grp   = oidCertExtType;
            }
            else {
                WOLFSSL_MSG("No Cert Policy set");
            }
        #else
            WOLFSSL_MSG("wolfSSL not built with WOLFSSL_SEP or WOLFSSL_CERT_EXT");
        #endif
            break;
        }
        case KEY_USAGE_OID:
        {
            WOLFSSL_ASN1_STRING* asn1str = NULL;
            if (x509->keyUsageSet) {
                if (c != NULL) {
                    *c = x509->keyUsageCrit;
                }

                asn1str = wolfSSL_ASN1_STRING_new();
                if (asn1str == NULL) {
                    WOLFSSL_MSG("Failed to malloc ASN1_STRING");
                    return NULL;
                }

                if (wolfSSL_ASN1_STRING_set(asn1str, &x509->keyUsage,
                        sizeof(word16)) != WOLFSSL_SUCCESS) {
                    WOLFSSL_MSG("wolfSSL_ASN1_STRING_set error");
                    wolfSSL_ASN1_STRING_free(asn1str);
                    return NULL;
                }

                asn1str->type = KEY_USAGE_OID;
            }
            else {
                WOLFSSL_MSG("No Key Usage set");
            }
            /* don't add stack of and return bit string directly */
            return asn1str;
        }
        case INHIBIT_ANY_OID:
            WOLFSSL_MSG("INHIBIT ANY extension not supported");
            break;

        case EXT_KEY_USAGE_OID:
            if (x509->extKeyUsageSrc != NULL) {
                if (c != NULL) {
                    if (x509->extKeyUsageCount > 1) {
                        *c = -2;
                    }
                    else {
                        *c = x509->extKeyUsageCrit;
                    }
                }
                obj = wolfSSL_ASN1_OBJECT_new();
                if (obj == NULL) {
                    WOLFSSL_MSG("Issue creating WOLFSSL_ASN1_OBJECT struct");
                    return NULL;
                }
                obj->type  = EXT_KEY_USAGE_OID;
                obj->grp   = oidCertExtType;
                obj->obj   = x509->extKeyUsageSrc;
                obj->objSz = x509->extKeyUsageSz;
            }
            else {
                WOLFSSL_MSG("No Extended Key Usage set");
            }
            break;

        case NAME_CONS_OID:
            WOLFSSL_MSG("Name Constraint OID extension not supported");
            break;

        case PRIV_KEY_USAGE_PERIOD_OID:
            WOLFSSL_MSG("Private Key Usage Period extension not supported");
            break;

        case SUBJECT_INFO_ACCESS:
            WOLFSSL_MSG("Subject Info Access extension not supported");
            break;

        case POLICY_MAP_OID:
            WOLFSSL_MSG("Policy Map extension not supported");
            break;

        case POLICY_CONST_OID:
            WOLFSSL_MSG("Policy Constraint extension not supported");
            break;

        case ISSUE_ALT_NAMES_OID:
            WOLFSSL_MSG("Issue Alt Names extension not supported");
            break;

        case TLS_FEATURE_OID:
            WOLFSSL_MSG("TLS Feature extension not supported");
            break;

        default:
            WOLFSSL_MSG("Unsupported/Unknown extension OID");
    }

    /* make sure stack of is allocated */
    if ((obj || gn) && sk == NULL) {
        sk = wolfSSL_sk_new_asn1_obj();
        if (sk == NULL) {
            goto err;
        }
    }
    if (obj) {
        if (wolfSSL_sk_ASN1_OBJECT_push(sk, obj) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Error pushing ASN1_OBJECT object onto "
                        "stack.");
            goto err;
        }
    }

    ret = sk;

    (void)idx;

    return ret;

err:
    if (obj) {
        wolfSSL_ASN1_OBJECT_free(obj);
    }
    if (gn) {
        wolfSSL_GENERAL_NAME_free(gn);
    }
    if (sk) {
        wolfSSL_sk_free(sk);
    }
    return NULL;
}
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#ifdef OPENSSL_EXTRA
#ifndef NO_CERTS
int wolfSSL_X509_add_altname_ex(WOLFSSL_X509* x509, const char* name,
        word32 nameSz, int type)
{
    DNS_entry* newAltName = NULL;
    char* nameCopy = NULL;

    if (x509 == NULL)
        return WOLFSSL_FAILURE;

    if ((name == NULL) || (nameSz == 0))
        return WOLFSSL_SUCCESS;

    newAltName = (DNS_entry*)XMALLOC(sizeof(DNS_entry),
            x509->heap, DYNAMIC_TYPE_ALTNAME);
    if (newAltName == NULL)
        return WOLFSSL_FAILURE;

    nameCopy = (char*)XMALLOC(nameSz + 1, x509->heap, DYNAMIC_TYPE_ALTNAME);
    if (nameCopy == NULL) {
        XFREE(newAltName, x509->heap, DYNAMIC_TYPE_ALTNAME);
        return WOLFSSL_FAILURE;
    }

    XMEMCPY(nameCopy, name, nameSz);

    nameCopy[nameSz] = '\0';

    newAltName->next = x509->altNames;
    newAltName->type = type;
    newAltName->len = nameSz;
    newAltName->name = nameCopy;
    x509->altNames = newAltName;

    return WOLFSSL_SUCCESS;
}

int wolfSSL_X509_add_altname(WOLFSSL_X509* x509, const char* name, int type)
{
    word32 nameSz;

    if (name == NULL)
        return WOLFSSL_SUCCESS;

    nameSz = (word32)XSTRLEN(name);
    if (nameSz == 0)
        return WOLFSSL_SUCCESS;

    if (type == ASN_IP_TYPE) {
        WOLFSSL_MSG("Type not supported, use wolfSSL_X509_add_altname_ex");
        return WOLFSSL_FAILURE;
    }

    return wolfSSL_X509_add_altname_ex(x509, name, nameSz, type);
}

#ifndef NO_WOLFSSL_STUB
WOLFSSL_X509_EXTENSION *wolfSSL_X509_delete_ext(WOLFSSL_X509 *x509, int loc)
{
    WOLFSSL_STUB("wolfSSL_X509_delete_ext");
    (void)x509;
    (void)loc;
    return NULL;
}

/* currently LHASH is not implemented (and not needed for Apache port) */
WOLFSSL_X509_EXTENSION* wolfSSL_X509V3_EXT_conf_nid(
        WOLF_LHASH_OF(CONF_VALUE)* conf, WOLFSSL_X509V3_CTX* ctx, int nid,
        char* value)
{
    WOLFSSL_STUB("wolfSSL_X509V3_EXT_conf_nid");

    if (conf != NULL) {
        WOLFSSL_MSG("Handling LHASH not implemented yet");
        return NULL;
    }

    (void)conf;
    (void)ctx;
    (void)nid;
    (void)value;
    return NULL;
}

void wolfSSL_X509V3_set_ctx_nodb(WOLFSSL_X509V3_CTX* ctx)
{
    WOLFSSL_STUB("wolfSSL_X509V3_set_ctx_nodb");
    (void)ctx;
}
#endif /* !NO_WOLFSSL_STUB */

#if defined(OPENSSL_ALL)
static void wolfSSL_X509V3_EXT_METHOD_populate(WOLFSSL_v3_ext_method *method,
                                               int nid)
{
    if (!method)
        return;

    WOLFSSL_ENTER("wolfSSL_X509V3_EXT_METHOD_populate");
    switch (nid) {
    case NID_subject_key_identifier:
        method->i2s = (X509V3_EXT_I2S)wolfSSL_i2s_ASN1_STRING;
        FALL_THROUGH;
    case NID_authority_key_identifier:
    case NID_key_usage:
    case NID_certificate_policies:
    case NID_policy_mappings:
    case NID_subject_alt_name:
    case NID_issuer_alt_name:
    case NID_basic_constraints:
    case NID_name_constraints:
    case NID_policy_constraints:
    case NID_ext_key_usage:
    case NID_crl_distribution_points:
    case NID_inhibit_any_policy:
    case NID_info_access:
        WOLFSSL_MSG("Nothing to populate for current NID");
        break;
    default:
        WOLFSSL_MSG("Unknown or unsupported NID");
        break;
    }

    return;
}

/**
 * @param nid One of the NID_* constants defined in asn.h
 * @param crit
 * @param data This data is copied to the returned extension.
 * @return
 */
WOLFSSL_X509_EXTENSION *wolfSSL_X509V3_EXT_i2d(int nid, int crit,
                                               void *data)
{
    WOLFSSL_X509_EXTENSION *ext = NULL;
    WOLFSSL_ASN1_STRING* asn1str = NULL;

    WOLFSSL_ENTER("wolfSSL_X509V3_EXT_i2d");

    if (!data) {
        return NULL;
    }

    if (!(ext = wolfSSL_X509_EXTENSION_new())) {
        return NULL;
    }

    wolfSSL_X509V3_EXT_METHOD_populate(&ext->ext_method, nid);

    switch (nid) {
    case NID_subject_key_identifier:
        /* WOLFSSL_ASN1_STRING */
    case NID_key_usage:
        /* WOLFSSL_ASN1_STRING */
    {
        asn1str = (WOLFSSL_ASN1_STRING*)data;
        ext->value = *asn1str;
        if (asn1str->isDynamic) {
            ext->value.data = (char*)XMALLOC(asn1str->length, NULL,
                                             DYNAMIC_TYPE_OPENSSL);
            if (!ext->value.data) {
                WOLFSSL_MSG("malloc failed");
                /* Zero so that no existing memory is freed */
                XMEMSET(&ext->value, 0, sizeof(WOLFSSL_ASN1_STRING));
                goto err_cleanup;
            }
            XMEMCPY(ext->value.data, asn1str->data, asn1str->length);
        }
        else {
            ext->value.data = ext->value.strData;
        }
        break;
    }
    case NID_subject_alt_name:
        /* typedef STACK_OF(GENERAL_NAME) GENERAL_NAMES */
    case NID_issuer_alt_name:
        /* typedef STACK_OF(GENERAL_NAME) GENERAL_NAMES */
    case NID_ext_key_usage:
        /* typedef STACK_OF(ASN1_OBJECT) EXTENDED_KEY_USAGE */
    case NID_info_access:
        /* typedef STACK_OF(ACCESS_DESCRIPTION) AUTHORITY_INFO_ACCESS */
    {
        WOLFSSL_STACK* sk = (WOLFSSL_STACK*)data;

        if (ext->ext_sk) {
            wolfSSL_sk_free(ext->ext_sk);
        }

        if (!(ext->ext_sk = wolfSSL_sk_dup(sk))) {
            WOLFSSL_MSG("wolfSSL_sk_dup failed");
            goto err_cleanup;
        }
        break;
    }
    case NID_basic_constraints:
    {
        /* WOLFSSL_BASIC_CONSTRAINTS */
        WOLFSSL_BASIC_CONSTRAINTS* bc = (WOLFSSL_BASIC_CONSTRAINTS*)data;

        if (!(ext->obj = wolfSSL_ASN1_OBJECT_new())) {
            WOLFSSL_MSG("wolfSSL_ASN1_OBJECT_new failed");
            goto err_cleanup;
        }

        ext->obj->ca = bc->ca;
        if (bc->pathlen) {
            ext->obj->pathlen = wolfSSL_ASN1_INTEGER_dup(bc->pathlen);
            if (!ext->obj->pathlen) {
                WOLFSSL_MSG("wolfSSL_ASN1_INTEGER_dup failed");
                goto err_cleanup;
            }
        }
        break;
    }
    case NID_authority_key_identifier:
    {
        /* AUTHORITY_KEYID */
        WOLFSSL_AUTHORITY_KEYID* akey = (WOLFSSL_AUTHORITY_KEYID*)data;

        if (akey->keyid) {
            if (wolfSSL_ASN1_STRING_set(&ext->value, akey->keyid->data,
                                    akey->keyid->length) != WOLFSSL_SUCCESS) {
                WOLFSSL_MSG("wolfSSL_ASN1_STRING_set failed");
                goto err_cleanup;
            }
            ext->value.type = akey->keyid->type;
        }
        else if (akey->issuer) {
            ext->obj = wolfSSL_ASN1_OBJECT_dup(akey->issuer);
            if (!ext->obj) {
                WOLFSSL_MSG("wolfSSL_ASN1_OBJECT_dup failed");
                goto err_cleanup;
            }
        }
        else {
            WOLFSSL_MSG("NID_authority_key_identifier empty data");
            goto err_cleanup;
        }
        break;
    }
    case NID_inhibit_any_policy:
        /* ASN1_INTEGER */
    case NID_certificate_policies:
        /* STACK_OF(POLICYINFO) */
    case NID_policy_mappings:
        /* STACK_OF(POLICY_MAPPING) */
    case NID_name_constraints:
        /* NAME_CONSTRAINTS */
    case NID_policy_constraints:
        /* POLICY_CONSTRAINTS */
    case NID_crl_distribution_points:
        /* typedef STACK_OF(DIST_POINT) CRL_DIST_POINTS */
    default:
        WOLFSSL_MSG("Unknown or unsupported NID");
        break;
    }

    ext->crit = crit;

    return ext;
err_cleanup:
    if (ext) {
        wolfSSL_X509_EXTENSION_free(ext);
    }
    if (asn1str) {
        wolfSSL_ASN1_STRING_free(asn1str);
    }
    return NULL;
}

/* Returns pointer to ASN1_OBJECT from an X509_EXTENSION object */
WOLFSSL_ASN1_OBJECT* wolfSSL_X509_EXTENSION_get_object \
    (WOLFSSL_X509_EXTENSION* ext)
{
    WOLFSSL_ENTER("wolfSSL_X509_EXTENSION_get_object");
    if(ext == NULL)
        return NULL;
    return ext->obj;
}
#endif /* OPENSSL_ALL */

/* Returns pointer to ASN1_STRING in X509_EXTENSION object */
WOLFSSL_ASN1_STRING* wolfSSL_X509_EXTENSION_get_data(WOLFSSL_X509_EXTENSION* ext)
{
    WOLFSSL_ENTER("wolfSSL_X509_EXTENSION_get_data");
    if (ext == NULL)
        return NULL;
    return &ext->value;
}

#if !defined(NO_PWDBASED)
int wolfSSL_X509_digest(const WOLFSSL_X509* x509, const WOLFSSL_EVP_MD* digest,
        unsigned char* buf, unsigned int* len)
{
    int ret;

    WOLFSSL_ENTER("wolfSSL_X509_digest");

    if (x509 == NULL || digest == NULL) {
        WOLFSSL_MSG("Null argument found");
        return WOLFSSL_FAILURE;
    }

    if (x509->derCert == NULL) {
        WOLFSSL_MSG("No DER certificate stored in X509");
        return WOLFSSL_FAILURE;
    }

    ret = wolfSSL_EVP_Digest(x509->derCert->buffer, x509->derCert->length, buf,
                              len, digest, NULL);
    WOLFSSL_LEAVE("wolfSSL_X509_digest", ret);
    return ret;
}

int wolfSSL_X509_pubkey_digest(const WOLFSSL_X509 *x509,
        const WOLFSSL_EVP_MD *digest, unsigned char* buf, unsigned int* len)
{
    int ret;

    WOLFSSL_ENTER("wolfSSL_X509_pubkey_digest");

    if (x509 == NULL || digest == NULL) {
        WOLFSSL_MSG("Null argument found");
        return WOLFSSL_FAILURE;
    }

    if (x509->pubKey.buffer == NULL || x509->pubKey.length == 0) {
        WOLFSSL_MSG("No DER public key stored in X509");
        return WOLFSSL_FAILURE;
    }

    ret = wolfSSL_EVP_Digest(x509->pubKey.buffer, x509->pubKey.length, buf,
                              len, digest, NULL);
    WOLFSSL_LEAVE("wolfSSL_X509_pubkey_digest", ret);
    return ret;
}
#endif

int wolfSSL_use_PrivateKey(WOLFSSL* ssl, WOLFSSL_EVP_PKEY* pkey)
{
    WOLFSSL_ENTER("wolfSSL_use_PrivateKey");
    if (ssl == NULL || pkey == NULL ) {
        return WOLFSSL_FAILURE;
    }

    return wolfSSL_use_PrivateKey_buffer(ssl, (unsigned char*)pkey->pkey.ptr,
                                         pkey->pkey_sz, WOLFSSL_FILETYPE_ASN1);
}


int wolfSSL_use_PrivateKey_ASN1(int pri, WOLFSSL* ssl, const unsigned char* der,
                                long derSz)
{
    WOLFSSL_ENTER("wolfSSL_use_PrivateKey_ASN1");
    if (ssl == NULL || der == NULL ) {
        return WOLFSSL_FAILURE;
    }

    (void)pri; /* type of private key */
    return wolfSSL_use_PrivateKey_buffer(ssl, der, derSz, WOLFSSL_FILETYPE_ASN1);
}
/******************************************************************************
* wolfSSL_CTX_use_PrivateKey_ASN1 - loads a private key buffer into the SSL ctx
*
* RETURNS:
* returns WOLFSSL_SUCCESS on success, otherwise returns WOLFSSL_FAILURE
*/

int wolfSSL_CTX_use_PrivateKey_ASN1(int pri, WOLFSSL_CTX* ctx,
                                            unsigned char* der, long derSz)
{
    WOLFSSL_ENTER("wolfSSL_CTX_use_PrivateKey_ASN1");
    if (ctx == NULL || der == NULL ) {
        return WOLFSSL_FAILURE;
    }

    (void)pri; /* type of private key */
    return wolfSSL_CTX_use_PrivateKey_buffer(ctx, der, derSz, WOLFSSL_FILETYPE_ASN1);
}


#ifndef NO_RSA
int wolfSSL_use_RSAPrivateKey_ASN1(WOLFSSL* ssl, unsigned char* der, long derSz)
{
    WOLFSSL_ENTER("wolfSSL_use_RSAPrivateKey_ASN1");
    if (ssl == NULL || der == NULL ) {
        return WOLFSSL_FAILURE;
    }

    return wolfSSL_use_PrivateKey_buffer(ssl, der, derSz, WOLFSSL_FILETYPE_ASN1);
}
#endif

int wolfSSL_use_certificate(WOLFSSL* ssl, WOLFSSL_X509* x509)
{
    long idx;

    WOLFSSL_ENTER("wolfSSL_use_certificate");
    if (x509 != NULL && ssl != NULL && x509->derCert != NULL) {
        if (ProcessBuffer(NULL, x509->derCert->buffer, x509->derCert->length,
                          WOLFSSL_FILETYPE_ASN1, CERT_TYPE, ssl, &idx, 0,
                          GET_VERIFY_SETTING_SSL(ssl)) == WOLFSSL_SUCCESS) {
            return WOLFSSL_SUCCESS;
        }
    }

    (void)idx;
    return WOLFSSL_FAILURE;
}

#endif /* NO_CERTS */

#endif /* OPENSSL_EXTRA */

#ifndef NO_CERTS
int wolfSSL_use_certificate_ASN1(WOLFSSL* ssl, const unsigned char* der,
                                 int derSz)
{
    long idx;

    WOLFSSL_ENTER("wolfSSL_use_certificate_ASN1");
    if (der != NULL && ssl != NULL) {
        if (ProcessBuffer(NULL, der, derSz, WOLFSSL_FILETYPE_ASN1, CERT_TYPE,
                ssl, &idx, 0, GET_VERIFY_SETTING_SSL(ssl)) == WOLFSSL_SUCCESS) {
            return WOLFSSL_SUCCESS;
        }
    }

    (void)idx;
    return WOLFSSL_FAILURE;
}

#ifndef NO_FILESYSTEM

WOLFSSL_ABI
int wolfSSL_use_certificate_file(WOLFSSL* ssl, const char* file, int format)
{
    WOLFSSL_ENTER("wolfSSL_use_certificate_file");

    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    if (ProcessFile(ssl->ctx, file, format, CERT_TYPE,
                ssl, 0, NULL, GET_VERIFY_SETTING_SSL(ssl)) == WOLFSSL_SUCCESS) {
        return WOLFSSL_SUCCESS;
    }

    return WOLFSSL_FAILURE;
}


WOLFSSL_ABI
int wolfSSL_use_PrivateKey_file(WOLFSSL* ssl, const char* file, int format)
{
    WOLFSSL_ENTER("wolfSSL_use_PrivateKey_file");

    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    if (ProcessFile(ssl->ctx, file, format, PRIVATEKEY_TYPE,
                ssl, 0, NULL, GET_VERIFY_SETTING_SSL(ssl)) == WOLFSSL_SUCCESS) {
        return WOLFSSL_SUCCESS;
    }

    return WOLFSSL_FAILURE;
}


WOLFSSL_ABI
int wolfSSL_use_certificate_chain_file(WOLFSSL* ssl, const char* file)
{
    /* process up to MAX_CHAIN_DEPTH plus subject cert */
    WOLFSSL_ENTER("wolfSSL_use_certificate_chain_file");

    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    if (ProcessFile(ssl->ctx, file, WOLFSSL_FILETYPE_PEM, CERT_TYPE,
               ssl, 1, NULL, GET_VERIFY_SETTING_SSL(ssl)) == WOLFSSL_SUCCESS) {
        return WOLFSSL_SUCCESS;
    }

   return WOLFSSL_FAILURE;
}

int wolfSSL_use_certificate_chain_file_format(WOLFSSL* ssl, const char* file,
                                              int format)
{
    /* process up to MAX_CHAIN_DEPTH plus subject cert */
    WOLFSSL_ENTER("wolfSSL_use_certificate_chain_file_format");

    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    if (ProcessFile(ssl->ctx, file, format, CERT_TYPE, ssl, 1,
                    NULL, GET_VERIFY_SETTING_SSL(ssl)) == WOLFSSL_SUCCESS) {
        return WOLFSSL_SUCCESS;
    }
    return WOLFSSL_FAILURE;
}

#endif /* !NO_FILESYSTEM */
#endif /* !NO_CERTS */

#ifdef HAVE_ECC

/* Set Temp CTX EC-DHE size in octets, can be 14 - 66 (112 - 521 bit) */
int wolfSSL_CTX_SetTmpEC_DHE_Sz(WOLFSSL_CTX* ctx, word16 sz)
{
    if (ctx == NULL)
        return BAD_FUNC_ARG;

    /* if 0 then get from loaded private key */
    if (sz == 0) {
        /* applies only to ECDSA */
        if (ctx->privateKeyType != ecc_dsa_sa_algo)
            return WOLFSSL_SUCCESS;

        if (ctx->privateKeySz == 0) {
            WOLFSSL_MSG("Must set private key/cert first");
            return BAD_FUNC_ARG;
        }

        sz = (word16)ctx->privateKeySz;
    }

    /* check size */
    if (sz < ECC_MINSIZE || sz > ECC_MAXSIZE)
        return BAD_FUNC_ARG;

    ctx->eccTempKeySz = sz;

    return WOLFSSL_SUCCESS;
}


/* Set Temp SSL EC-DHE size in octets, can be 14 - 66 (112 - 521 bit) */
int wolfSSL_SetTmpEC_DHE_Sz(WOLFSSL* ssl, word16 sz)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    /* check size */
    if (sz < ECC_MINSIZE || sz > ECC_MAXSIZE)
        return BAD_FUNC_ARG;

    ssl->eccTempKeySz = sz;

    return WOLFSSL_SUCCESS;
}

#endif /* HAVE_ECC */


#ifdef OPENSSL_EXTRA

#ifndef NO_FILESYSTEM
int wolfSSL_CTX_use_RSAPrivateKey_file(WOLFSSL_CTX* ctx,const char* file,
                                   int format)
{
    WOLFSSL_ENTER("SSL_CTX_use_RSAPrivateKey_file");

    return wolfSSL_CTX_use_PrivateKey_file(ctx, file, format);
}


int wolfSSL_use_RSAPrivateKey_file(WOLFSSL* ssl, const char* file, int format)
{
    WOLFSSL_ENTER("wolfSSL_use_RSAPrivateKey_file");

    return wolfSSL_use_PrivateKey_file(ssl, file, format);
}
#endif /* NO_FILESYSTEM */


/* Copies the master secret over to out buffer. If outSz is 0 returns the size
 * of master secret.
 *
 * ses : a session from completed TLS/SSL handshake
 * out : buffer to hold copy of master secret
 * outSz : size of out buffer
 * returns : number of bytes copied into out buffer on success
 *           less then or equal to 0 is considered a failure case
 */
int wolfSSL_SESSION_get_master_key(const WOLFSSL_SESSION* ses,
        unsigned char* out, int outSz)
{
    int size;

    if (outSz == 0) {
        return SECRET_LEN;
    }

    if (ses == NULL || out == NULL || outSz < 0) {
        return 0;
    }

    if (outSz > SECRET_LEN) {
        size = SECRET_LEN;
    }
    else {
        size = outSz;
    }

    XMEMCPY(out, ses->masterSecret, size);
    return size;
}


int wolfSSL_SESSION_get_master_key_length(const WOLFSSL_SESSION* ses)
{
    (void)ses;
    return SECRET_LEN;
}

#endif /* OPENSSL_EXTRA */

#ifndef NO_FILESYSTEM
#ifdef HAVE_NTRU

int wolfSSL_CTX_use_NTRUPrivateKey_file(WOLFSSL_CTX* ctx, const char* file)
{
    WOLFSSL_ENTER("wolfSSL_CTX_use_NTRUPrivateKey_file");

    if (ctx == NULL)
        return WOLFSSL_FAILURE;

    if (ProcessFile(ctx, file, WOLFSSL_FILETYPE_RAW, PRIVATEKEY_TYPE, NULL, 0,
                    NULL, GET_VERIFY_SETTING_CTX(ctx)) == WOLFSSL_SUCCESS) {
        ctx->haveNTRU = 1;
        return WOLFSSL_SUCCESS;
    }

    return WOLFSSL_FAILURE;
}

#endif /* HAVE_NTRU */


#endif /* NO_FILESYSTEM */


WOLFSSL_ABI
void wolfSSL_CTX_set_verify(WOLFSSL_CTX* ctx, int mode, VerifyCallback vc)
{
    WOLFSSL_ENTER("wolfSSL_CTX_set_verify");
    if (ctx == NULL)
        return;

    ctx->verifyPeer     = 0;
    ctx->verifyNone     = 0;
    ctx->failNoCert     = 0;
    ctx->failNoCertxPSK = 0;

    if (mode == WOLFSSL_VERIFY_NONE) {
        ctx->verifyNone = 1;
    }
    else {
        if (mode & WOLFSSL_VERIFY_PEER) {
            ctx->verifyPeer = 1;
        }
        if (mode & WOLFSSL_VERIFY_FAIL_EXCEPT_PSK) {
            ctx->failNoCertxPSK = 1;
        }
        if (mode & WOLFSSL_VERIFY_FAIL_IF_NO_PEER_CERT) {
            ctx->failNoCert = 1;
        }
    }

    ctx->verifyCallback = vc;
}

#ifdef OPENSSL_ALL
void wolfSSL_CTX_set_cert_verify_callback(WOLFSSL_CTX* ctx,
    CertVerifyCallback cb, void* arg)
{
    WOLFSSL_ENTER("SSL_CTX_set_cert_verify_callback");
    if (ctx == NULL)
        return;

    ctx->verifyCertCb = cb;
    ctx->verifyCertCbArg = arg;
}
#endif


void wolfSSL_set_verify(WOLFSSL* ssl, int mode, VerifyCallback vc)
{
    WOLFSSL_ENTER("wolfSSL_set_verify");
    if (ssl == NULL)
        return;

    ssl->options.verifyPeer     = 0;
    ssl->options.verifyNone     = 0;
    ssl->options.failNoCert     = 0;
    ssl->options.failNoCertxPSK = 0;

    if (mode == WOLFSSL_VERIFY_NONE) {
        ssl->options.verifyNone = 1;
    }
    else {
        if (mode & WOLFSSL_VERIFY_PEER) {
            ssl->options.verifyPeer = 1;
        }
        if (mode & WOLFSSL_VERIFY_FAIL_EXCEPT_PSK) {
            ssl->options.failNoCertxPSK = 1;
        }
        if (mode & WOLFSSL_VERIFY_FAIL_IF_NO_PEER_CERT) {
            ssl->options.failNoCert = 1;
        }
    }

    ssl->verifyCallback = vc;
}

void wolfSSL_set_verify_result(WOLFSSL *ssl, long v)
{
    WOLFSSL_ENTER("wolfSSL_set_verify_result");

    if (ssl == NULL)
        return;

#ifdef OPENSSL_ALL
    ssl->verifyCallbackResult = v;
#else
    (void)v;
    WOLFSSL_STUB("wolfSSL_set_verify_result");
#endif
}

#if defined(OPENSSL_EXTRA) && !defined(NO_CERTS) && \
    defined(WOLFSSL_TLS13) && defined(WOLFSSL_POST_HANDSHAKE_AUTH)
/* For TLS v1.3 send handshake messages after handshake completes. */
/* Returns 1=WOLFSSL_SUCCESS or 0=WOLFSSL_FAILURE */
int wolfSSL_verify_client_post_handshake(WOLFSSL* ssl)
{
    int ret = wolfSSL_request_certificate(ssl);
    return (ret == 0) ? WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
}

int wolfSSL_CTX_set_post_handshake_auth(WOLFSSL_CTX* ctx, int val)
{
    int ret = wolfSSL_CTX_allow_post_handshake_auth(ctx);
    if (ret == 0) {
        ctx->postHandshakeAuth = (val != 0);
    }
    return (ret == 0) ? WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
}
int wolfSSL_set_post_handshake_auth(WOLFSSL* ssl, int val)
{
    int ret = wolfSSL_allow_post_handshake_auth(ssl);
    if (ret == 0) {
        ssl->options.postHandshakeAuth = (val != 0);
    }
    return (ret == 0) ? WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
}
#endif /* OPENSSL_EXTRA && !NO_CERTS && WOLFSSL_TLS13 && WOLFSSL_POST_HANDSHAKE_AUTH */

/* store user ctx for verify callback */
void wolfSSL_SetCertCbCtx(WOLFSSL* ssl, void* ctx)
{
    WOLFSSL_ENTER("wolfSSL_SetCertCbCtx");
    if (ssl)
        ssl->verifyCbCtx = ctx;
}


/* store context CA Cache addition callback */
void wolfSSL_CTX_SetCACb(WOLFSSL_CTX* ctx, CallbackCACache cb)
{
    if (ctx && ctx->cm)
        ctx->cm->caCacheCallback = cb;
}


#if defined(PERSIST_CERT_CACHE)

#if !defined(NO_FILESYSTEM)

/* Persist cert cache to file */
int wolfSSL_CTX_save_cert_cache(WOLFSSL_CTX* ctx, const char* fname)
{
    WOLFSSL_ENTER("wolfSSL_CTX_save_cert_cache");

    if (ctx == NULL || fname == NULL)
        return BAD_FUNC_ARG;

    return CM_SaveCertCache(ctx->cm, fname);
}


/* Persist cert cache from file */
int wolfSSL_CTX_restore_cert_cache(WOLFSSL_CTX* ctx, const char* fname)
{
    WOLFSSL_ENTER("wolfSSL_CTX_restore_cert_cache");

    if (ctx == NULL || fname == NULL)
        return BAD_FUNC_ARG;

    return CM_RestoreCertCache(ctx->cm, fname);
}

#endif /* NO_FILESYSTEM */

/* Persist cert cache to memory */
int wolfSSL_CTX_memsave_cert_cache(WOLFSSL_CTX* ctx, void* mem,
                                   int sz, int* used)
{
    WOLFSSL_ENTER("wolfSSL_CTX_memsave_cert_cache");

    if (ctx == NULL || mem == NULL || used == NULL || sz <= 0)
        return BAD_FUNC_ARG;

    return CM_MemSaveCertCache(ctx->cm, mem, sz, used);
}


/* Restore cert cache from memory */
int wolfSSL_CTX_memrestore_cert_cache(WOLFSSL_CTX* ctx, const void* mem, int sz)
{
    WOLFSSL_ENTER("wolfSSL_CTX_memrestore_cert_cache");

    if (ctx == NULL || mem == NULL || sz <= 0)
        return BAD_FUNC_ARG;

    return CM_MemRestoreCertCache(ctx->cm, mem, sz);
}


/* get how big the the cert cache save buffer needs to be */
int wolfSSL_CTX_get_cert_cache_memsize(WOLFSSL_CTX* ctx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_get_cert_cache_memsize");

    if (ctx == NULL)
        return BAD_FUNC_ARG;

    return CM_GetCertCacheMemSize(ctx->cm);
}

#endif /* PERSIST_CERT_CACHE */
#endif /* !NO_CERTS */


#ifndef NO_SESSION_CACHE

WOLFSSL_ABI
WOLFSSL_SESSION* wolfSSL_get_session(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("SSL_get_session");
    if (ssl)
        return GetSession(ssl, 0, 1);

    return NULL;
}

/*
 * Sets the session object to use when establishing a TLS/SSL session using
 * the ssl object. Therefore, this function must be called before
 * wolfSSL_connect. The session object to use can be obtained in a previous
 * TLS/SSL connection using wolfSSL_get_session.
 *
 * This function rejects the session if it has been expired when this function
 * is called. Note that this expiration check is wolfSSL specific and differs
 * from OpenSSL return code behavior.
 *
 * By default, wolfSSL_set_session returns WOLFSSL_SUCCESS on successfully
 * setting the session, WOLFSSL_FAILURE on failure due to the session cache
 * being disabled, or the session has expired.
 *
 * To match OpenSSL return code behavior when session is expired, define
 * OPENSSL_EXTRA and WOLFSSL_ERROR_CODE_OPENSSL. This behavior will return
 * WOLFSSL_SUCCESS even when the session is expired and rejected.
 */
WOLFSSL_ABI
int wolfSSL_set_session(WOLFSSL* ssl, WOLFSSL_SESSION* session)
{
    WOLFSSL_ENTER("SSL_set_session");
    if (session)
        return SetSession(ssl, session);

    return WOLFSSL_FAILURE;
}


#ifndef NO_CLIENT_CACHE

/* Associate client session with serverID, find existing or store for saving
   if newSession flag on, don't reuse existing session
   WOLFSSL_SUCCESS on ok */
int wolfSSL_SetServerID(WOLFSSL* ssl, const byte* id, int len, int newSession)
{
    WOLFSSL_SESSION* session = NULL;

    WOLFSSL_ENTER("wolfSSL_SetServerID");

    if (ssl == NULL || id == NULL || len <= 0)
        return BAD_FUNC_ARG;

    if (newSession == 0) {
        session = GetSessionClient(ssl, id, len);
        if (session) {
            if (SetSession(ssl, session) != WOLFSSL_SUCCESS) {
    #ifdef HAVE_EXT_CACHE
                FreeSession(session, 0);
    #endif
                WOLFSSL_MSG("SetSession failed");
                session = NULL;
            }
        }
    }

    if (session == NULL) {
        WOLFSSL_MSG("Valid ServerID not cached already");

        ssl->session.idLen = (word16)min(SERVER_ID_LEN, (word32)len);
        XMEMCPY(ssl->session.serverID, id, ssl->session.idLen);
    }
    #ifdef HAVE_EXT_CACHE
    else
        FreeSession(session, 0);
    #endif

    return WOLFSSL_SUCCESS;
}

#endif /* NO_CLIENT_CACHE */

#if defined(PERSIST_SESSION_CACHE)

/* for persistence, if changes to layout need to increment and modify
   save_session_cache() and restore_session_cache and memory versions too */
#define WOLFSSL_CACHE_VERSION 2

/* Session Cache Header information */
typedef struct {
    int version;     /* cache layout version id */
    int rows;        /* session rows */
    int columns;     /* session columns */
    int sessionSz;   /* sizeof WOLFSSL_SESSION */
} cache_header_t;

/* current persistence layout is:

   1) cache_header_t
   2) SessionCache
   3) ClientCache

   update WOLFSSL_CACHE_VERSION if change layout for the following
   PERSISTENT_SESSION_CACHE functions
*/


/* get how big the the session cache save buffer needs to be */
int wolfSSL_get_session_cache_memsize(void)
{
    int sz  = (int)(sizeof(SessionCache) + sizeof(cache_header_t));

    #ifndef NO_CLIENT_CACHE
        sz += (int)(sizeof(ClientCache));
    #endif

    return sz;
}


/* Persist session cache to memory */
int wolfSSL_memsave_session_cache(void* mem, int sz)
{
    int i;
    cache_header_t cache_header;
    SessionRow*    row  = (SessionRow*)((byte*)mem + sizeof(cache_header));
#ifndef NO_CLIENT_CACHE
    ClientRow*     clRow;
#endif

    WOLFSSL_ENTER("wolfSSL_memsave_session_cache");

    if (sz < wolfSSL_get_session_cache_memsize()) {
        WOLFSSL_MSG("Memory buffer too small");
        return BUFFER_E;
    }

    cache_header.version   = WOLFSSL_CACHE_VERSION;
    cache_header.rows      = SESSION_ROWS;
    cache_header.columns   = SESSIONS_PER_ROW;
    cache_header.sessionSz = (int)sizeof(WOLFSSL_SESSION);
    XMEMCPY(mem, &cache_header, sizeof(cache_header));

    if (wc_LockMutex(&session_mutex) != 0) {
        WOLFSSL_MSG("Session cache mutex lock failed");
        return BAD_MUTEX_E;
    }

    for (i = 0; i < cache_header.rows; ++i)
        XMEMCPY(row++, SessionCache + i, sizeof(SessionRow));

#ifndef NO_CLIENT_CACHE
    clRow = (ClientRow*)row;
    for (i = 0; i < cache_header.rows; ++i)
        XMEMCPY(clRow++, ClientCache + i, sizeof(ClientRow));
#endif

    wc_UnLockMutex(&session_mutex);

    WOLFSSL_LEAVE("wolfSSL_memsave_session_cache", WOLFSSL_SUCCESS);

    return WOLFSSL_SUCCESS;
}


/* Restore the persistent session cache from memory */
int wolfSSL_memrestore_session_cache(const void* mem, int sz)
{
    int    i;
    cache_header_t cache_header;
    SessionRow*    row  = (SessionRow*)((byte*)mem + sizeof(cache_header));
#ifndef NO_CLIENT_CACHE
    ClientRow*     clRow;
#endif

    WOLFSSL_ENTER("wolfSSL_memrestore_session_cache");

    if (sz < wolfSSL_get_session_cache_memsize()) {
        WOLFSSL_MSG("Memory buffer too small");
        return BUFFER_E;
    }

    XMEMCPY(&cache_header, mem, sizeof(cache_header));
    if (cache_header.version   != WOLFSSL_CACHE_VERSION ||
        cache_header.rows      != SESSION_ROWS ||
        cache_header.columns   != SESSIONS_PER_ROW ||
        cache_header.sessionSz != (int)sizeof(WOLFSSL_SESSION)) {

        WOLFSSL_MSG("Session cache header match failed");
        return CACHE_MATCH_ERROR;
    }

    if (wc_LockMutex(&session_mutex) != 0) {
        WOLFSSL_MSG("Session cache mutex lock failed");
        return BAD_MUTEX_E;
    }

    for (i = 0; i < cache_header.rows; ++i)
        XMEMCPY(SessionCache + i, row++, sizeof(SessionRow));

#ifndef NO_CLIENT_CACHE
    clRow = (ClientRow*)row;
    for (i = 0; i < cache_header.rows; ++i)
        XMEMCPY(ClientCache + i, clRow++, sizeof(ClientRow));
#endif

    wc_UnLockMutex(&session_mutex);

    WOLFSSL_LEAVE("wolfSSL_memrestore_session_cache", WOLFSSL_SUCCESS);

    return WOLFSSL_SUCCESS;
}

#if !defined(NO_FILESYSTEM)

/* Persist session cache to file */
/* doesn't use memsave because of additional memory use */
int wolfSSL_save_session_cache(const char *fname)
{
    XFILE  file;
    int    ret;
    int    rc = WOLFSSL_SUCCESS;
    int    i;
    cache_header_t cache_header;

    WOLFSSL_ENTER("wolfSSL_save_session_cache");

    file = XFOPEN(fname, "w+b");
    if (file == XBADFILE) {
        WOLFSSL_MSG("Couldn't open session cache save file");
        return WOLFSSL_BAD_FILE;
    }
    cache_header.version   = WOLFSSL_CACHE_VERSION;
    cache_header.rows      = SESSION_ROWS;
    cache_header.columns   = SESSIONS_PER_ROW;
    cache_header.sessionSz = (int)sizeof(WOLFSSL_SESSION);

    /* cache header */
    ret = (int)XFWRITE(&cache_header, sizeof cache_header, 1, file);
    if (ret != 1) {
        WOLFSSL_MSG("Session cache header file write failed");
        XFCLOSE(file);
        return FWRITE_ERROR;
    }

    if (wc_LockMutex(&session_mutex) != 0) {
        WOLFSSL_MSG("Session cache mutex lock failed");
        XFCLOSE(file);
        return BAD_MUTEX_E;
    }

    /* session cache */
    for (i = 0; i < cache_header.rows; ++i) {
        ret = (int)XFWRITE(SessionCache + i, sizeof(SessionRow), 1, file);
        if (ret != 1) {
            WOLFSSL_MSG("Session cache member file write failed");
            rc = FWRITE_ERROR;
            break;
        }
    }

#ifndef NO_CLIENT_CACHE
    /* client cache */
    for (i = 0; i < cache_header.rows; ++i) {
        ret = (int)XFWRITE(ClientCache + i, sizeof(ClientRow), 1, file);
        if (ret != 1) {
            WOLFSSL_MSG("Client cache member file write failed");
            rc = FWRITE_ERROR;
            break;
        }
    }
#endif /* NO_CLIENT_CACHE */

    wc_UnLockMutex(&session_mutex);

    XFCLOSE(file);
    WOLFSSL_LEAVE("wolfSSL_save_session_cache", rc);

    return rc;
}


/* Restore the persistent session cache from file */
/* doesn't use memstore because of additional memory use */
int wolfSSL_restore_session_cache(const char *fname)
{
    XFILE  file;
    int    rc = WOLFSSL_SUCCESS;
    int    ret;
    int    i;
    cache_header_t cache_header;

    WOLFSSL_ENTER("wolfSSL_restore_session_cache");

    file = XFOPEN(fname, "rb");
    if (file == XBADFILE) {
        WOLFSSL_MSG("Couldn't open session cache save file");
        return WOLFSSL_BAD_FILE;
    }
    /* cache header */
    ret = (int)XFREAD(&cache_header, sizeof cache_header, 1, file);
    if (ret != 1) {
        WOLFSSL_MSG("Session cache header file read failed");
        XFCLOSE(file);
        return FREAD_ERROR;
    }
    if (cache_header.version   != WOLFSSL_CACHE_VERSION ||
        cache_header.rows      != SESSION_ROWS ||
        cache_header.columns   != SESSIONS_PER_ROW ||
        cache_header.sessionSz != (int)sizeof(WOLFSSL_SESSION)) {

        WOLFSSL_MSG("Session cache header match failed");
        XFCLOSE(file);
        return CACHE_MATCH_ERROR;
    }

    if (wc_LockMutex(&session_mutex) != 0) {
        WOLFSSL_MSG("Session cache mutex lock failed");
        XFCLOSE(file);
        return BAD_MUTEX_E;
    }

    /* session cache */
    for (i = 0; i < cache_header.rows; ++i) {
        ret = (int)XFREAD(SessionCache + i, sizeof(SessionRow), 1, file);
        if (ret != 1) {
            WOLFSSL_MSG("Session cache member file read failed");
            XMEMSET(SessionCache, 0, sizeof SessionCache);
            rc = FREAD_ERROR;
            break;
        }
    }

#ifndef NO_CLIENT_CACHE
    /* client cache */
    for (i = 0; i < cache_header.rows; ++i) {
        ret = (int)XFREAD(ClientCache + i, sizeof(ClientRow), 1, file);
        if (ret != 1) {
            WOLFSSL_MSG("Client cache member file read failed");
            XMEMSET(ClientCache, 0, sizeof ClientCache);
            rc = FREAD_ERROR;
            break;
        }
    }

#endif /* NO_CLIENT_CACHE */

    wc_UnLockMutex(&session_mutex);

    XFCLOSE(file);
    WOLFSSL_LEAVE("wolfSSL_restore_session_cache", rc);

    return rc;
}

#endif /* !NO_FILESYSTEM */
#endif /* PERSIST_SESSION_CACHE */
#endif /* NO_SESSION_CACHE */


void wolfSSL_load_error_strings(void)
{
    /* compatibility only */
}


int wolfSSL_library_init(void)
{
    WOLFSSL_ENTER("SSL_library_init");
    if (wolfSSL_Init() == WOLFSSL_SUCCESS)
        return WOLFSSL_SUCCESS;
    else
        return WOLFSSL_FATAL_ERROR;
}


#ifdef HAVE_SECRET_CALLBACK

int wolfSSL_set_session_secret_cb(WOLFSSL* ssl, SessionSecretCb cb, void* ctx)
{
    WOLFSSL_ENTER("wolfSSL_set_session_secret_cb");
    if (ssl == NULL)
        return WOLFSSL_FATAL_ERROR;

    ssl->sessionSecretCb = cb;
    ssl->sessionSecretCtx = ctx;
    /* If using a pre-set key, assume session resumption. */
    ssl->session.sessionIDSz = 0;
    ssl->options.resuming = 1;

    return WOLFSSL_SUCCESS;
}

#endif


#ifndef NO_SESSION_CACHE

/* on by default if built in but allow user to turn off */
WOLFSSL_ABI
long wolfSSL_CTX_set_session_cache_mode(WOLFSSL_CTX* ctx, long mode)
{
    WOLFSSL_ENTER("SSL_CTX_set_session_cache_mode");
    if (mode == WOLFSSL_SESS_CACHE_OFF)
        ctx->sessionCacheOff = 1;

    if ((mode & WOLFSSL_SESS_CACHE_NO_AUTO_CLEAR) != 0)
        ctx->sessionCacheFlushOff = 1;

#ifdef HAVE_EXT_CACHE
    if ((mode & WOLFSSL_SESS_CACHE_NO_INTERNAL_STORE) != 0)
        ctx->internalCacheOff = 1;
#endif

    return WOLFSSL_SUCCESS;
}

#endif /* NO_SESSION_CACHE */


#if !defined(NO_CERTS)
#if defined(PERSIST_CERT_CACHE)


#define WOLFSSL_CACHE_CERT_VERSION 1

typedef struct {
    int version;                 /* cache cert layout version id */
    int rows;                    /* hash table rows, CA_TABLE_SIZE */
    int columns[CA_TABLE_SIZE];  /* columns per row on list */
    int signerSz;                /* sizeof Signer object */
} CertCacheHeader;

/* current cert persistence layout is:

   1) CertCacheHeader
   2) caTable

   update WOLFSSL_CERT_CACHE_VERSION if change layout for the following
   PERSIST_CERT_CACHE functions
*/


/* Return memory needed to persist this signer, have lock */
static WC_INLINE int GetSignerMemory(Signer* signer)
{
    int sz = sizeof(signer->pubKeySize) + sizeof(signer->keyOID)
           + sizeof(signer->nameLen)    + sizeof(signer->subjectNameHash);

#if !defined(NO_SKID)
        sz += (int)sizeof(signer->subjectKeyIdHash);
#endif

    /* add dynamic bytes needed */
    sz += signer->pubKeySize;
    sz += signer->nameLen;

    return sz;
}


/* Return memory needed to persist this row, have lock */
static WC_INLINE int GetCertCacheRowMemory(Signer* row)
{
    int sz = 0;

    while (row) {
        sz += GetSignerMemory(row);
        row = row->next;
    }

    return sz;
}


/* get the size of persist cert cache, have lock */
static WC_INLINE int GetCertCacheMemSize(WOLFSSL_CERT_MANAGER* cm)
{
    int sz;
    int i;

    sz = sizeof(CertCacheHeader);

    for (i = 0; i < CA_TABLE_SIZE; i++)
        sz += GetCertCacheRowMemory(cm->caTable[i]);

    return sz;
}


/* Store cert cache header columns with number of items per list, have lock */
static WC_INLINE void SetCertHeaderColumns(WOLFSSL_CERT_MANAGER* cm, int* columns)
{
    int     i;
    Signer* row;

    for (i = 0; i < CA_TABLE_SIZE; i++) {
        int count = 0;
        row = cm->caTable[i];

        while (row) {
            ++count;
            row = row->next;
        }
        columns[i] = count;
    }
}


/* Restore whole cert row from memory, have lock, return bytes consumed,
   < 0 on error, have lock */
static WC_INLINE int RestoreCertRow(WOLFSSL_CERT_MANAGER* cm, byte* current,
                                 int row, int listSz, const byte* end)
{
    int idx = 0;

    if (listSz < 0) {
        WOLFSSL_MSG("Row header corrupted, negative value");
        return PARSE_ERROR;
    }

    while (listSz) {
        Signer* signer;
        byte*   publicKey;
        byte*   start = current + idx;  /* for end checks on this signer */
        int     minSz = sizeof(signer->pubKeySize) + sizeof(signer->keyOID) +
                      sizeof(signer->nameLen) + sizeof(signer->subjectNameHash);
        #ifndef NO_SKID
                minSz += (int)sizeof(signer->subjectKeyIdHash);
        #endif

        if (start + minSz > end) {
            WOLFSSL_MSG("Would overread restore buffer");
            return BUFFER_E;
        }
        signer = MakeSigner(cm->heap);
        if (signer == NULL)
            return MEMORY_E;

        /* pubKeySize */
        XMEMCPY(&signer->pubKeySize, current + idx, sizeof(signer->pubKeySize));
        idx += (int)sizeof(signer->pubKeySize);

        /* keyOID */
        XMEMCPY(&signer->keyOID, current + idx, sizeof(signer->keyOID));
        idx += (int)sizeof(signer->keyOID);

        /* pulicKey */
        if (start + minSz + signer->pubKeySize > end) {
            WOLFSSL_MSG("Would overread restore buffer");
            FreeSigner(signer, cm->heap);
            return BUFFER_E;
        }
        publicKey = (byte*)XMALLOC(signer->pubKeySize, cm->heap,
                                   DYNAMIC_TYPE_KEY);
        if (publicKey == NULL) {
            FreeSigner(signer, cm->heap);
            return MEMORY_E;
        }

        XMEMCPY(publicKey, current + idx, signer->pubKeySize);
        signer->publicKey = publicKey;
        idx += signer->pubKeySize;

        /* nameLen */
        XMEMCPY(&signer->nameLen, current + idx, sizeof(signer->nameLen));
        idx += (int)sizeof(signer->nameLen);

        /* name */
        if (start + minSz + signer->pubKeySize + signer->nameLen > end) {
            WOLFSSL_MSG("Would overread restore buffer");
            FreeSigner(signer, cm->heap);
            return BUFFER_E;
        }
        signer->name = (char*)XMALLOC(signer->nameLen, cm->heap,
                                      DYNAMIC_TYPE_SUBJECT_CN);
        if (signer->name == NULL) {
            FreeSigner(signer, cm->heap);
            return MEMORY_E;
        }

        XMEMCPY(signer->name, current + idx, signer->nameLen);
        idx += signer->nameLen;

        /* subjectNameHash */
        XMEMCPY(signer->subjectNameHash, current + idx, SIGNER_DIGEST_SIZE);
        idx += SIGNER_DIGEST_SIZE;

        #ifndef NO_SKID
            /* subjectKeyIdHash */
            XMEMCPY(signer->subjectKeyIdHash, current + idx,SIGNER_DIGEST_SIZE);
            idx += SIGNER_DIGEST_SIZE;
        #endif

        signer->next = cm->caTable[row];
        cm->caTable[row] = signer;

        --listSz;
    }

    return idx;
}


/* Store whole cert row into memory, have lock, return bytes added */
static WC_INLINE int StoreCertRow(WOLFSSL_CERT_MANAGER* cm, byte* current, int row)
{
    int     added  = 0;
    Signer* list   = cm->caTable[row];

    while (list) {
        XMEMCPY(current + added, &list->pubKeySize, sizeof(list->pubKeySize));
        added += (int)sizeof(list->pubKeySize);

        XMEMCPY(current + added, &list->keyOID,     sizeof(list->keyOID));
        added += (int)sizeof(list->keyOID);

        XMEMCPY(current + added, list->publicKey, list->pubKeySize);
        added += list->pubKeySize;

        XMEMCPY(current + added, &list->nameLen, sizeof(list->nameLen));
        added += (int)sizeof(list->nameLen);

        XMEMCPY(current + added, list->name, list->nameLen);
        added += list->nameLen;

        XMEMCPY(current + added, list->subjectNameHash, SIGNER_DIGEST_SIZE);
        added += SIGNER_DIGEST_SIZE;

        #ifndef NO_SKID
            XMEMCPY(current + added, list->subjectKeyIdHash,SIGNER_DIGEST_SIZE);
            added += SIGNER_DIGEST_SIZE;
        #endif

        list = list->next;
    }

    return added;
}


/* Persist cert cache to memory, have lock */
static WC_INLINE int DoMemSaveCertCache(WOLFSSL_CERT_MANAGER* cm,
                                     void* mem, int sz)
{
    int realSz;
    int ret = WOLFSSL_SUCCESS;
    int i;

    WOLFSSL_ENTER("DoMemSaveCertCache");

    realSz = GetCertCacheMemSize(cm);
    if (realSz > sz) {
        WOLFSSL_MSG("Mem output buffer too small");
        ret = BUFFER_E;
    }
    else {
        byte*           current;
        CertCacheHeader hdr;

        hdr.version  = WOLFSSL_CACHE_CERT_VERSION;
        hdr.rows     = CA_TABLE_SIZE;
        SetCertHeaderColumns(cm, hdr.columns);
        hdr.signerSz = (int)sizeof(Signer);

        XMEMCPY(mem, &hdr, sizeof(CertCacheHeader));
        current = (byte*)mem + sizeof(CertCacheHeader);

        for (i = 0; i < CA_TABLE_SIZE; ++i)
            current += StoreCertRow(cm, current, i);
    }

    return ret;
}


#if !defined(NO_FILESYSTEM)

/* Persist cert cache to file */
int CM_SaveCertCache(WOLFSSL_CERT_MANAGER* cm, const char* fname)
{
    XFILE file;
    int   rc = WOLFSSL_SUCCESS;
    int   memSz;
    byte* mem;

    WOLFSSL_ENTER("CM_SaveCertCache");

    file = XFOPEN(fname, "w+b");
    if (file == XBADFILE) {
       WOLFSSL_MSG("Couldn't open cert cache save file");
       return WOLFSSL_BAD_FILE;
    }

    if (wc_LockMutex(&cm->caLock) != 0) {
        WOLFSSL_MSG("wc_LockMutex on caLock failed");
        XFCLOSE(file);
        return BAD_MUTEX_E;
    }

    memSz = GetCertCacheMemSize(cm);
    mem   = (byte*)XMALLOC(memSz, cm->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (mem == NULL) {
        WOLFSSL_MSG("Alloc for tmp buffer failed");
        rc = MEMORY_E;
    } else {
        rc = DoMemSaveCertCache(cm, mem, memSz);
        if (rc == WOLFSSL_SUCCESS) {
            int ret = (int)XFWRITE(mem, memSz, 1, file);
            if (ret != 1) {
                WOLFSSL_MSG("Cert cache file write failed");
                rc = FWRITE_ERROR;
            }
        }
        XFREE(mem, cm->heap, DYNAMIC_TYPE_TMP_BUFFER);
    }

    wc_UnLockMutex(&cm->caLock);
    XFCLOSE(file);

    return rc;
}


/* Restore cert cache from file */
int CM_RestoreCertCache(WOLFSSL_CERT_MANAGER* cm, const char* fname)
{
    XFILE file;
    int   rc = WOLFSSL_SUCCESS;
    int   ret;
    int   memSz;
    byte* mem;

    WOLFSSL_ENTER("CM_RestoreCertCache");

    file = XFOPEN(fname, "rb");
    if (file == XBADFILE) {
       WOLFSSL_MSG("Couldn't open cert cache save file");
       return WOLFSSL_BAD_FILE;
    }

    if(XFSEEK(file, 0, XSEEK_END) != 0) {
        XFCLOSE(file);
        return WOLFSSL_BAD_FILE;
    }
    memSz = (int)XFTELL(file);
    XREWIND(file);

    if (memSz > MAX_WOLFSSL_FILE_SIZE || memSz <= 0) {
        WOLFSSL_MSG("CM_RestoreCertCache file size error");
        XFCLOSE(file);
        return WOLFSSL_BAD_FILE;
    }

    mem = (byte*)XMALLOC(memSz, cm->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (mem == NULL) {
        WOLFSSL_MSG("Alloc for tmp buffer failed");
        XFCLOSE(file);
        return MEMORY_E;
    }

    ret = (int)XFREAD(mem, memSz, 1, file);
    if (ret != 1) {
        WOLFSSL_MSG("Cert file read error");
        rc = FREAD_ERROR;
    } else {
        rc = CM_MemRestoreCertCache(cm, mem, memSz);
        if (rc != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Mem restore cert cache failed");
        }
    }

    XFREE(mem, cm->heap, DYNAMIC_TYPE_TMP_BUFFER);
    XFCLOSE(file);

    return rc;
}

#endif /* NO_FILESYSTEM */


/* Persist cert cache to memory */
int CM_MemSaveCertCache(WOLFSSL_CERT_MANAGER* cm, void* mem, int sz, int* used)
{
    int ret = WOLFSSL_SUCCESS;

    WOLFSSL_ENTER("CM_MemSaveCertCache");

    if (wc_LockMutex(&cm->caLock) != 0) {
        WOLFSSL_MSG("wc_LockMutex on caLock failed");
        return BAD_MUTEX_E;
    }

    ret = DoMemSaveCertCache(cm, mem, sz);
    if (ret == WOLFSSL_SUCCESS)
        *used  = GetCertCacheMemSize(cm);

    wc_UnLockMutex(&cm->caLock);

    return ret;
}


/* Restore cert cache from memory */
int CM_MemRestoreCertCache(WOLFSSL_CERT_MANAGER* cm, const void* mem, int sz)
{
    int ret = WOLFSSL_SUCCESS;
    int i;
    CertCacheHeader* hdr = (CertCacheHeader*)mem;
    byte*            current = (byte*)mem + sizeof(CertCacheHeader);
    byte*            end     = (byte*)mem + sz;  /* don't go over */

    WOLFSSL_ENTER("CM_MemRestoreCertCache");

    if (current > end) {
        WOLFSSL_MSG("Cert Cache Memory buffer too small");
        return BUFFER_E;
    }

    if (hdr->version  != WOLFSSL_CACHE_CERT_VERSION ||
        hdr->rows     != CA_TABLE_SIZE ||
        hdr->signerSz != (int)sizeof(Signer)) {

        WOLFSSL_MSG("Cert Cache Memory header mismatch");
        return CACHE_MATCH_ERROR;
    }

    if (wc_LockMutex(&cm->caLock) != 0) {
        WOLFSSL_MSG("wc_LockMutex on caLock failed");
        return BAD_MUTEX_E;
    }

    FreeSignerTable(cm->caTable, CA_TABLE_SIZE, cm->heap);

    for (i = 0; i < CA_TABLE_SIZE; ++i) {
        int added = RestoreCertRow(cm, current, i, hdr->columns[i], end);
        if (added < 0) {
            WOLFSSL_MSG("RestoreCertRow error");
            ret = added;
            break;
        }
        current += added;
    }

    wc_UnLockMutex(&cm->caLock);

    return ret;
}


/* get how big the the cert cache save buffer needs to be */
int CM_GetCertCacheMemSize(WOLFSSL_CERT_MANAGER* cm)
{
    int sz;

    WOLFSSL_ENTER("CM_GetCertCacheMemSize");

    if (wc_LockMutex(&cm->caLock) != 0) {
        WOLFSSL_MSG("wc_LockMutex on caLock failed");
        return BAD_MUTEX_E;
    }

    sz = GetCertCacheMemSize(cm);

    wc_UnLockMutex(&cm->caLock);

    return sz;
}

#endif /* PERSIST_CERT_CACHE */
#endif /* NO_CERTS */

#ifdef OPENSSL_EXTRA


/* removes all cipher suites from the list that contain "toRemove"
 * returns the new list size on success
 */
static int wolfSSL_remove_ciphers(char* list, int sz, const char* toRemove)
{
    int idx = 0;
    char* next = (char*)list;
    int totalSz = sz;

    if (list == NULL) {
        return 0;
    }

    do {
        char*  current = next;
        char   name[MAX_SUITE_NAME + 1];
        word32 length;

        next   = XSTRSTR(next, ":");
        length = min(sizeof(name), !next ? (word32)XSTRLEN(current) /* last */
                                         : (word32)(next - current));

        XSTRNCPY(name, current, length);
        name[(length == sizeof(name)) ? length - 1 : length] = 0;

        if (XSTRSTR(name, toRemove)) {
            XMEMMOVE(list + idx, list + idx + length, totalSz - (idx + length));
            totalSz -= length;
            list[totalSz] = '\0';
            next = current;
        }
        else {
            idx += length;
        }
    } while (next++); /* ++ needed to skip ':' */

    return totalSz;
}
/*
 * build enabled cipher list w/ TLS13 or w/o TLS13 suites
 * @param ctx    a pointer to WOLFSSL_CTX structure
 * @param suites currently enabled suites
 * @param onlytlsv13suites flag whether correcting w/ TLS13 suites
 *                         or w/o TLS13 suties
 * @param list   suites list that user wants to update
 * @return suites list on successs, otherwise NULL
 */
static char* buildEnabledCipherList(WOLFSSL_CTX* ctx, Suites* suites,
           int tls13Only, const char* list)
{
    word32 idx = 0;
    word32 listsz = 0;
    word32 len = 0;
    word32 ianasz = 0;
    const char* enabledcs = NULL;
    char* locallist = NULL;
    char* head = NULL;
    byte cipherSuite0;
    byte cipherSuite;
    
    /* sanity check */
    if (ctx == NULL || suites == NULL || list == NULL)
        return NULL;
        
    if (!suites->setSuites)
        return NULL;
    
    listsz = (word32)XSTRLEN(list);
    
    /* calculate necessary buffer length */
    for(idx = 0; idx < suites->suiteSz; idx++) {
        
        cipherSuite0 = suites->suites[idx];
        cipherSuite  = suites->suites[++idx];
        
        if (tls13Only && cipherSuite0 == TLS13_BYTE) {
            enabledcs = GetCipherNameInternal(cipherSuite0, cipherSuite);
        } 
        else if (!tls13Only && cipherSuite0 != TLS13_BYTE) {
            enabledcs = GetCipherNameInternal(cipherSuite0, cipherSuite);
        } 
        else
            continue;
        
        if (XSTRNCMP(enabledcs, "None", XSTRLEN(enabledcs)) != 0) {
            len += (word32)XSTRLEN(enabledcs) + 2;
        }
    }
    
    len += listsz + 2;
    
    /* build string */
    if (len > (listsz + 2)) {
        locallist = (char*)XMALLOC(len, ctx->heap,
                                           DYNAMIC_TYPE_TMP_BUFFER);
        /* sanity check */
        if (!locallist)
            return NULL;
        
        XMEMSET(locallist, 0, len);
        
        head = locallist;
        
        if (!tls13Only)
        {
            /* always tls13 suites in the head position */
            XSTRNCPY(locallist, list, len);
            locallist += listsz;
            *locallist++ = ':';
            *locallist = 0;
            len -= listsz + 1;
        }
        
        for(idx = 0; idx < suites->suiteSz; idx++) {
            cipherSuite0 = suites->suites[idx];
            cipherSuite  = suites->suites[++idx];
            
            if (tls13Only && cipherSuite0 == TLS13_BYTE) {
                enabledcs = GetCipherNameInternal(cipherSuite0, cipherSuite);
            }
            else if (!tls13Only && cipherSuite0 != TLS13_BYTE) {
                enabledcs = GetCipherNameInternal(cipherSuite0, cipherSuite);
            } 
            else
                continue;
            
            ianasz = (int)XSTRLEN(enabledcs);
            if (ianasz + 1 < len) {
                XSTRNCPY(locallist, enabledcs, len);
                locallist += ianasz;
                
                *locallist++ = ':';
                *locallist = 0;
                len -= ianasz + 1;
            }
            else{
                XFREE(locallist, ctx->heap, DYNAMIC_TYPE_TMP_BUFFER);
                return NULL;
            }
        }
        
        if (tls13Only) {
            XSTRNCPY(locallist, list, len);
            locallist += listsz;
            *locallist = 0;
        }
        
        return head;
    } 
    else 
        return NULL;
}

/*
 * check if the list has TLS13 and pre-TLS13 suites
 * @param list cipher suite list that user want to set
 * @return mixed: 0, only pre-TLS13: 1, only TLS13: 2
 */
static int CheckcipherList(const char* list)
{
    int ret;
    int findTLSv13Suites = 0;
    int findbeforeSuites = 0;
    byte cipherSuite0;
    byte cipherSuite1;
    int flags;
    char* next = (char*)list;
    
    do {
        char*  current = next;
        char   name[MAX_SUITE_NAME + 1];
        word32 length = MAX_SUITE_NAME;
        word32 current_length;

        next   = XSTRSTR(next, ":");
        
        current_length = (!next) ? (word32)XSTRLEN(current)
                                 : (word32)(next - current);
        
        if (current_length < length) {
            length = current_length;
        }
        XSTRNCPY(name, current, length);
        name[length] = 0;
        
        ret = wolfSSL_get_cipher_suite_from_name(name, &cipherSuite0, 
                                                        &cipherSuite1, &flags);
        if (ret == 0) {
            if (cipherSuite0 == TLS13_BYTE) {
                /* TLSv13 suite */
                findTLSv13Suites = 1;
                break;
            } 
            else {
                findbeforeSuites = 1;
                break;
            }
        } 
        if (findTLSv13Suites == 1 && findbeforeSuites == 1) {
            /* list has mixed suites */
            return 0;
        }
    }  while (next++); /* ++ needed to skip ':' */
    
    if (findTLSv13Suites == 0 && findbeforeSuites == 1) {
        return 1;/* only before TLSv13 sutes */
    }
    else if (findTLSv13Suites == 1 && findbeforeSuites == 0) {
        return 2;/* only TLSv13 suties */
    }
    else { 
        return 0;/* handle as mixed */
    }
}

/* parse some bulk lists like !eNULL / !aNULL
 *
 * returns WOLFSSL_SUCCESS on success and sets the cipher suite list
 */
static int wolfSSL_parse_cipher_list(WOLFSSL_CTX* ctx, Suites* suites,
        const char* list)
{
    int       ret          = 0;
    const int suiteSz      = GetCipherNamesSize();
    char*     next         = (char*)list;
    const CipherSuiteInfo* names = GetCipherNames();
    char*     localList    = NULL;
    int sz = 0;
    int listattribute = 0;
    char*     buildcipherList = NULL;
    int tls13Only = 0;
    
    if (suites == NULL || list == NULL) {
        WOLFSSL_MSG("NULL argument");
        return WOLFSSL_FAILURE;
    }

    /* does list contain eNULL or aNULL? */
    if (XSTRSTR(list, "aNULL") || XSTRSTR(list, "eNULL")) {
        do {
            char*  current = next;
            char   name[MAX_SUITE_NAME + 1];
            int    i;
            word32 length = MAX_SUITE_NAME;
            word32 current_length;

            next   = XSTRSTR(next, ":");
            
            current_length = (!next) ? (word32)XSTRLEN(current)
                                     : (word32)(next - current);
            
            if (current_length < length) {
                length = current_length;
            }
            XSTRNCPY(name, current, length);
            name[length] = 0;

            /* check for "not" case */
            if (name[0] == '!' && suiteSz > 0) {
                /* populate list with all suites if not already created */
                if (localList == NULL) {
                    for (i = 0; i < suiteSz; i++) {
                        sz += (int)XSTRLEN(names[i].name) + 2;
                    }
                    localList = (char*)XMALLOC(sz, ctx->heap,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
                    if (localList == NULL) {
                        return WOLFSSL_FAILURE;
                    }
                    wolfSSL_get_ciphers(localList, sz);
                    sz = (int)XSTRLEN(localList);
                }

                if (XSTRSTR(name, "eNULL")) {
                    wolfSSL_remove_ciphers(localList, sz, "-NULL");
                }
            }
        }
        while (next++); /* ++ needed to skip ':' */

        ret = SetCipherList(ctx, suites, localList);
        XFREE(localList, ctx->heap, DYNAMIC_TYPE_TMP_BUFFER);
        return (ret)? WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
    }
    else {
        
        listattribute = CheckcipherList(list);
        
        if (listattribute == 0) {
           /* list has mixed(pre-TLSv13 and TLSv13) suites
            * update cipher suites the same as before
            */
            return (SetCipherList(ctx, suites, list)) ? WOLFSSL_SUCCESS :
            WOLFSSL_FAILURE;
        } 
        else if (listattribute == 1) {
           /* list has only pre-TLSv13 suites. 
            * Only update before TLSv13 suites.
            */
            tls13Only = 1;
        } 
        else if (listattribute == 2) {
           /* list has only TLSv13 suites. Only update TLv13 suites
            * simulate set_ciphersuites() comatibility layer API
            */
            tls13Only = 0;
        }
        
        buildcipherList = buildEnabledCipherList(ctx, ctx->suites, 
                                                tls13Only, list);
        
        if (buildcipherList) {
            ret = SetCipherList(ctx, suites, buildcipherList);
            XFREE(buildcipherList, ctx->heap, DYNAMIC_TYPE_TMP_BUFFER);
        }
        else {
            ret = SetCipherList(ctx, suites, list);
        }

        return ret;
    }
}

#endif


int wolfSSL_CTX_set_cipher_list(WOLFSSL_CTX* ctx, const char* list)
{
    WOLFSSL_ENTER("wolfSSL_CTX_set_cipher_list");

    if (ctx == NULL)
        return WOLFSSL_FAILURE;

    /* alloc/init on demand only */
    if (ctx->suites == NULL) {
        ctx->suites = (Suites*)XMALLOC(sizeof(Suites), ctx->heap,
                                       DYNAMIC_TYPE_SUITES);
        if (ctx->suites == NULL) {
            WOLFSSL_MSG("Memory alloc for Suites failed");
            return WOLFSSL_FAILURE;
        }
        XMEMSET(ctx->suites, 0, sizeof(Suites));
    }

#ifdef OPENSSL_EXTRA
    return wolfSSL_parse_cipher_list(ctx, ctx->suites, list);
#else
    return (SetCipherList(ctx, ctx->suites, list)) ? WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
#endif
}


int wolfSSL_set_cipher_list(WOLFSSL* ssl, const char* list)
{
    WOLFSSL_ENTER("wolfSSL_set_cipher_list");
#ifdef SINGLE_THREADED
    if (ssl->ctx->suites == ssl->suites) {
        ssl->suites = (Suites*)XMALLOC(sizeof(Suites), ssl->heap,
                                       DYNAMIC_TYPE_SUITES);
        if (ssl->suites == NULL) {
            WOLFSSL_MSG("Suites Memory error");
            return MEMORY_E;
        }
        *ssl->suites = *ssl->ctx->suites;
        ssl->options.ownSuites = 1;
    }
#endif

#ifdef OPENSSL_EXTRA
    return wolfSSL_parse_cipher_list(ssl->ctx, ssl->suites, list);
#else
    return (SetCipherList(ssl->ctx, ssl->suites, list)) ? WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
#endif
}

#ifdef HAVE_KEYING_MATERIAL

#define TLS_PRF_LABEL_CLIENT_FINISHED     "client finished"
#define TLS_PRF_LABEL_SERVER_FINISHED     "server finished"
#define TLS_PRF_LABEL_MASTER_SECRET       "master secret"
#define TLS_PRF_LABEL_EXT_MASTER_SECRET   "extended master secret"
#define TLS_PRF_LABEL_KEY_EXPANSION       "key expansion"

static const struct ForbiddenLabels {
    const char* label;
    size_t labelLen;
} forbiddenLabels[] = {
    {TLS_PRF_LABEL_CLIENT_FINISHED, XSTR_SIZEOF(TLS_PRF_LABEL_CLIENT_FINISHED)},
    {TLS_PRF_LABEL_SERVER_FINISHED, XSTR_SIZEOF(TLS_PRF_LABEL_SERVER_FINISHED)},
    {TLS_PRF_LABEL_MASTER_SECRET, XSTR_SIZEOF(TLS_PRF_LABEL_MASTER_SECRET)},
    {TLS_PRF_LABEL_EXT_MASTER_SECRET, XSTR_SIZEOF(TLS_PRF_LABEL_EXT_MASTER_SECRET)},
    {TLS_PRF_LABEL_KEY_EXPANSION, XSTR_SIZEOF(TLS_PRF_LABEL_KEY_EXPANSION)},
    {NULL, 0},
};

/**
 * Implement RFC 5705
 * TLS 1.3 uses a different exporter definition (section 7.5 of RFC 8446)
 * @return WOLFSSL_SUCCESS on success and WOLFSSL_FAILURE on error
 */
int wolfSSL_export_keying_material(WOLFSSL *ssl,
        unsigned char *out, size_t outLen,
        const char *label, size_t labelLen,
        const unsigned char *context, size_t contextLen,
        int use_context)
{
    byte*  seed = NULL;
    word32 seedLen;
    const struct ForbiddenLabels* fl;

    WOLFSSL_ENTER("wolfSSL_export_keying_material");

    if (ssl == NULL || out == NULL || label == NULL ||
            (use_context && contextLen && context == NULL)) {
        WOLFSSL_MSG("Bad argument");
        return WOLFSSL_FAILURE;
    }

    /* clientRandom + serverRandom
     * OR
     * clientRandom + serverRandom + ctx len encoding + ctx */
    seedLen = !use_context ? (word32)SEED_LEN :
                             (word32)SEED_LEN + 2 + (word32)contextLen;

    if (ssl->options.saveArrays == 0 || ssl->arrays == NULL) {
        WOLFSSL_MSG("To export keying material wolfSSL needs to keep handshake "
                    "data. Call wolfSSL_KeepArrays before attempting to "
                    "export keyig material.");
        return WOLFSSL_FAILURE;
    }

    /* check forbidden labels */
    for (fl = &forbiddenLabels[0]; fl->label != NULL; fl++) {
        if (labelLen >= fl->labelLen &&
                XMEMCMP(label, fl->label, fl->labelLen) == 0) {
            WOLFSSL_MSG("Forbidden label");
            return WOLFSSL_FAILURE;
        }
    }

#ifdef WOLFSSL_TLS13
    if (IsAtLeastTLSv1_3(ssl->version)) {
        /* Path for TLS 1.3 */
        if (!use_context) {
            contextLen = 0;
            context = (byte*)""; /* Give valid pointer for 0 length memcpy */
        }

        if (Tls13_Exporter(ssl, out, (word32)outLen, label, labelLen,
                context, contextLen) != 0) {
            WOLFSSL_MSG("Tls13_Exporter error");
            return WOLFSSL_FAILURE;
        }
        return WOLFSSL_SUCCESS;
    }
#endif

    /* Path for <=TLS 1.2 */
    seed = (byte*)XMALLOC(seedLen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (seed == NULL) {
        WOLFSSL_MSG("malloc error");
        return WOLFSSL_FAILURE;
    }

    XMEMCPY(seed,           ssl->arrays->clientRandom, RAN_LEN);
    XMEMCPY(seed + RAN_LEN, ssl->arrays->serverRandom, RAN_LEN);

    if (use_context) {
        /* Encode len in big endian */
        seed[SEED_LEN    ] = (contextLen >> 8) & 0xFF;
        seed[SEED_LEN + 1] = (contextLen) & 0xFF;
        if (contextLen) {
            /* 0 length context is allowed */
            XMEMCPY(seed + SEED_LEN + 2, context, contextLen);
        }
    }

    if (wc_PRF_TLS(out, (word32)outLen, ssl->arrays->masterSecret, SECRET_LEN,
            (byte*)label, (word32)labelLen, seed, seedLen, IsAtLeastTLSv1_2(ssl),
            ssl->specs.mac_algorithm, ssl->heap, ssl->devId) != 0) {
        WOLFSSL_MSG("wc_PRF_TLS error");
        XFREE(seed, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        return WOLFSSL_FAILURE;
    }

    XFREE(seed, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    return WOLFSSL_SUCCESS;
}
#endif /* HAVE_KEYING_MATERIAL */

int wolfSSL_dtls_get_using_nonblock(WOLFSSL* ssl)
{
    int useNb = 0;

    if (ssl == NULL)
        return WOLFSSL_FAILURE;

    WOLFSSL_ENTER("wolfSSL_dtls_get_using_nonblock");
    if (ssl->options.dtls) {
#ifdef WOLFSSL_DTLS
        useNb = ssl->options.dtlsUseNonblock;
#endif
    }
    else {
        WOLFSSL_MSG("wolfSSL_dtls_get_using_nonblock() is "
                    "DEPRECATED for non-DTLS use.");
    }
    return useNb;
}


#ifndef WOLFSSL_LEANPSK

void wolfSSL_dtls_set_using_nonblock(WOLFSSL* ssl, int nonblock)
{
    (void)nonblock;

    WOLFSSL_ENTER("wolfSSL_dtls_set_using_nonblock");

    if (ssl == NULL)
        return;

    if (ssl->options.dtls) {
#ifdef WOLFSSL_DTLS
        ssl->options.dtlsUseNonblock = (nonblock != 0);
#endif
    }
    else {
        WOLFSSL_MSG("wolfSSL_dtls_set_using_nonblock() is "
                    "DEPRECATED for non-DTLS use.");
    }
}


#ifdef WOLFSSL_DTLS

int wolfSSL_dtls_get_current_timeout(WOLFSSL* ssl)
{
    int timeout = 0;
    if (ssl)
        timeout = ssl->dtls_timeout;

    WOLFSSL_LEAVE("wolfSSL_dtls_get_current_timeout()", timeout);
    return timeout;
}

int wolfSSL_DTLSv1_get_timeout(WOLFSSL* ssl, WOLFSSL_TIMEVAL* timeleft)
{
    if (ssl && timeleft) {
        XMEMSET(timeleft, 0, sizeof(WOLFSSL_TIMEVAL));
        timeleft->tv_sec = ssl->dtls_timeout;
    }
    return 0;
}

#ifndef NO_WOLFSSL_STUB
int wolfSSL_DTLSv1_handle_timeout(WOLFSSL* ssl)
{
    WOLFSSL_STUB("SSL_DTLSv1_handle_timeout");
    (void)ssl;
    return 0;
}
#endif

#ifndef NO_WOLFSSL_STUB
void wolfSSL_DTLSv1_set_initial_timeout_duration(WOLFSSL* ssl, word32 duration_ms)
{
    WOLFSSL_STUB("SSL_DTLSv1_set_initial_timeout_duration");
    (void)ssl;
    (void)duration_ms;
}
#endif

/* user may need to alter init dtls recv timeout, WOLFSSL_SUCCESS on ok */
int wolfSSL_dtls_set_timeout_init(WOLFSSL* ssl, int timeout)
{
    if (ssl == NULL || timeout < 0)
        return BAD_FUNC_ARG;

    if (timeout > ssl->dtls_timeout_max) {
        WOLFSSL_MSG("Can't set dtls timeout init greater than dtls timeout max");
        return BAD_FUNC_ARG;
    }

    ssl->dtls_timeout_init = timeout;
    ssl->dtls_timeout = timeout;

    return WOLFSSL_SUCCESS;
}


/* user may need to alter max dtls recv timeout, WOLFSSL_SUCCESS on ok */
int wolfSSL_dtls_set_timeout_max(WOLFSSL* ssl, int timeout)
{
    if (ssl == NULL || timeout < 0)
        return BAD_FUNC_ARG;

    if (timeout < ssl->dtls_timeout_init) {
        WOLFSSL_MSG("Can't set dtls timeout max less than dtls timeout init");
        return BAD_FUNC_ARG;
    }

    ssl->dtls_timeout_max = timeout;

    return WOLFSSL_SUCCESS;
}


int wolfSSL_dtls_got_timeout(WOLFSSL* ssl)
{
    int result = WOLFSSL_SUCCESS;
    WOLFSSL_ENTER("wolfSSL_dtls_got_timeout()");

    if (ssl == NULL)
        return WOLFSSL_FATAL_ERROR;

    if ((IsSCR(ssl) || !ssl->options.handShakeDone)) {
        if (DtlsMsgPoolTimeout(ssl) < 0){
            ssl->error = SOCKET_ERROR_E;
            WOLFSSL_ERROR(ssl->error);
            result = WOLFSSL_FATAL_ERROR;
        }
        else if ((result = DtlsMsgPoolSend(ssl, 0)) < 0)  {
            ssl->error = result;
            WOLFSSL_ERROR(result);
            result = WOLFSSL_FATAL_ERROR;
        }
        else {
            /* Reset return value to success */
            result = WOLFSSL_SUCCESS;
        }
    }

    WOLFSSL_LEAVE("wolfSSL_dtls_got_timeout()", result);
    return result;
}


/* retransmit all the saves messages, WOLFSSL_SUCCESS on ok */
int wolfSSL_dtls_retransmit(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_dtls_retransmit()");

    if (ssl == NULL)
        return WOLFSSL_FATAL_ERROR;

    if (!ssl->options.handShakeDone) {
        int result = DtlsMsgPoolSend(ssl, 0);
        if (result < 0) {
            ssl->error = result;
            WOLFSSL_ERROR(result);
            return WOLFSSL_FATAL_ERROR;
        }
    }

    return 0;
}

#endif /* DTLS */
#endif /* LEANPSK */


#if defined(WOLFSSL_DTLS) && !defined(NO_WOLFSSL_SERVER)

/* Not an SSL function, return 0 for success, error code otherwise */
/* Prereq: ssl's RNG needs to be initialized. */
int wolfSSL_DTLS_SetCookieSecret(WOLFSSL* ssl,
                                 const byte* secret, word32 secretSz)
{
    int ret = 0;

    WOLFSSL_ENTER("wolfSSL_DTLS_SetCookieSecret");

    if (ssl == NULL) {
        WOLFSSL_MSG("need a SSL object");
        return BAD_FUNC_ARG;
    }

    if (secret != NULL && secretSz == 0) {
        WOLFSSL_MSG("can't have a new secret without a size");
        return BAD_FUNC_ARG;
    }

    /* If secretSz is 0, use the default size. */
    if (secretSz == 0)
        secretSz = COOKIE_SECRET_SZ;

    if (secretSz != ssl->buffers.dtlsCookieSecret.length) {
        byte* newSecret;

        if (ssl->buffers.dtlsCookieSecret.buffer != NULL) {
            ForceZero(ssl->buffers.dtlsCookieSecret.buffer,
                      ssl->buffers.dtlsCookieSecret.length);
            XFREE(ssl->buffers.dtlsCookieSecret.buffer,
                  ssl->heap, DYNAMIC_TYPE_NONE);
        }

        newSecret = (byte*)XMALLOC(secretSz, ssl->heap,DYNAMIC_TYPE_COOKIE_PWD);
        if (newSecret == NULL) {
            ssl->buffers.dtlsCookieSecret.buffer = NULL;
            ssl->buffers.dtlsCookieSecret.length = 0;
            WOLFSSL_MSG("couldn't allocate new cookie secret");
            return MEMORY_ERROR;
        }
        ssl->buffers.dtlsCookieSecret.buffer = newSecret;
        ssl->buffers.dtlsCookieSecret.length = secretSz;
    }

    /* If the supplied secret is NULL, randomly generate a new secret. */
    if (secret == NULL) {
        ret = wc_RNG_GenerateBlock(ssl->rng,
                             ssl->buffers.dtlsCookieSecret.buffer, secretSz);
    }
    else
        XMEMCPY(ssl->buffers.dtlsCookieSecret.buffer, secret, secretSz);

    WOLFSSL_LEAVE("wolfSSL_DTLS_SetCookieSecret", 0);
    return ret;
}

#endif /* WOLFSSL_DTLS && !NO_WOLFSSL_SERVER */


/* EITHER SIDE METHODS */
#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_EITHER_SIDE)
    WOLFSSL_METHOD* wolfSSLv23_method(void)
    {
        return wolfSSLv23_method_ex(NULL);
    }
    WOLFSSL_METHOD* wolfSSLv23_method_ex(void* heap)
    {
        WOLFSSL_METHOD* m = NULL;
        WOLFSSL_ENTER("SSLv23_method");
    #if !defined(NO_WOLFSSL_CLIENT)
        m = wolfSSLv23_client_method_ex(heap);
    #elif !defined(NO_WOLFSSL_SERVER)
        m = wolfSSLv23_server_method_ex(heap);
    #endif
        if (m != NULL) {
            m->side = WOLFSSL_NEITHER_END;
        }

        return m;
    }

    #ifdef WOLFSSL_ALLOW_SSLV3
    WOLFSSL_METHOD* wolfSSLv3_method(void)
    {
        return wolfSSLv3_method_ex(NULL);
    }
    WOLFSSL_METHOD* wolfSSLv3_method_ex(void* heap)
    {
        WOLFSSL_METHOD* m = NULL;
        WOLFSSL_ENTER("SSLv3_method");
    #if !defined(NO_WOLFSSL_CLIENT)
        m = wolfSSLv3_client_method_ex(heap);
    #elif !defined(NO_WOLFSSL_SERVER)
        m = wolfSSLv3_server_method_ex(heap);
    #endif
        if (m != NULL) {
            m->side = WOLFSSL_NEITHER_END;
        }

        return m;
    }
    #endif
#endif /* OPENSSL_EXTRA || WOLFSSL_EITHER_SIDE */

/* client only parts */
#ifndef NO_WOLFSSL_CLIENT

    #ifdef OPENSSL_EXTRA
    WOLFSSL_METHOD* wolfSSLv2_client_method(void)
    {
        WOLFSSL_STUB("wolfSSLv2_client_method");
        return NULL;
    }
    #endif

    #if defined(WOLFSSL_ALLOW_SSLV3) && !defined(NO_OLD_TLS)
    WOLFSSL_METHOD* wolfSSLv3_client_method(void)
    {
        return wolfSSLv3_client_method_ex(NULL);
    }
    WOLFSSL_METHOD* wolfSSLv3_client_method_ex(void* heap)
    {
        WOLFSSL_METHOD* method =
                              (WOLFSSL_METHOD*) XMALLOC(sizeof(WOLFSSL_METHOD),
                                                     heap, DYNAMIC_TYPE_METHOD);
        (void)heap;
        WOLFSSL_ENTER("SSLv3_client_method_ex");
        if (method)
            InitSSL_Method(method, MakeSSLv3());
        return method;
    }
    #endif /* WOLFSSL_ALLOW_SSLV3 && !NO_OLD_TLS */


    WOLFSSL_METHOD* wolfSSLv23_client_method(void)
    {
        return wolfSSLv23_client_method_ex(NULL);
    }
    WOLFSSL_METHOD* wolfSSLv23_client_method_ex(void* heap)
    {
        WOLFSSL_METHOD* method =
                              (WOLFSSL_METHOD*) XMALLOC(sizeof(WOLFSSL_METHOD),
                                                     heap, DYNAMIC_TYPE_METHOD);
        (void)heap;
        WOLFSSL_ENTER("SSLv23_client_method_ex");
        if (method) {
    #if !defined(NO_SHA256) || defined(WOLFSSL_SHA384) || defined(WOLFSSL_SHA512)
        #if defined(WOLFSSL_TLS13)
            InitSSL_Method(method, MakeTLSv1_3());
        #elif !defined(WOLFSSL_NO_TLS12)
            InitSSL_Method(method, MakeTLSv1_2());
        #elif !defined(NO_OLD_TLS)
            InitSSL_Method(method, MakeTLSv1_1());
        #endif
    #else
        #ifndef NO_OLD_TLS
            InitSSL_Method(method, MakeTLSv1_1());
        #endif
    #endif
    #if !defined(NO_OLD_TLS) || defined(WOLFSSL_TLS13)
            method->downgrade = 1;
    #endif
        }
        return method;
    }


    #if defined(WOLFSSL_DTLS) || !defined(WOLFSSL_NO_TLS12) || !defined(NO_OLD_TLS) || \
        defined(WOLFSSL_ALLOW_SSLV3)
    /* If SCTP is not enabled returns the state of the dtls option.
     * If SCTP is enabled returns dtls && !sctp. */
    static WC_INLINE int IsDtlsNotSctpMode(WOLFSSL* ssl)
    {
        int result = ssl->options.dtls;

        if (result) {
        #ifdef WOLFSSL_SCTP
            result = !ssl->options.dtlsSctp;
        #endif
        }

        return result;
    }
    #endif /* WOLFSSL_DTLS || !WOLFSSL_NO_TLS12 || !NO_OLD_TLS */


    /* please see note at top of README if you get an error from connect */
    WOLFSSL_ABI
    int wolfSSL_connect(WOLFSSL* ssl)
    {
    #if !(defined(WOLFSSL_NO_TLS12) && defined(NO_OLD_TLS) && defined(WOLFSSL_TLS13))
        int neededState;
    #endif

        WOLFSSL_ENTER("SSL_connect()");

        #ifdef HAVE_ERRNO_H
            errno = 0;
        #endif

        if (ssl == NULL)
            return BAD_FUNC_ARG;

    #if defined(OPENSSL_EXTRA) || defined(WOLFSSL_EITHER_SIDE)
        if (ssl->options.side == WOLFSSL_NEITHER_END) {
            ssl->error = InitSSL_Side(ssl, WOLFSSL_CLIENT_END);
            if (ssl->error != WOLFSSL_SUCCESS) {
                WOLFSSL_ERROR(ssl->error);
                return WOLFSSL_FATAL_ERROR;
            }
            ssl->error = 0; /* expected to be zero here */
        }

    #ifdef OPENSSL_EXTRA
        if (ssl->CBIS != NULL) {
            ssl->CBIS(ssl, SSL_ST_CONNECT, WOLFSSL_SUCCESS);
            ssl->cbmode = SSL_CB_WRITE;
        }
    #endif
    #endif /* OPENSSL_EXTRA || WOLFSSL_EITHER_SIDE */

    #if defined(WOLFSSL_NO_TLS12) && defined(NO_OLD_TLS) && defined(WOLFSSL_TLS13)
        return wolfSSL_connect_TLSv13(ssl);
    #else
        #ifdef WOLFSSL_TLS13
        if (ssl->options.tls1_3)
            return wolfSSL_connect_TLSv13(ssl);
        #endif

#ifdef WOLFSSL_WOLFSENTRY_HOOKS
        if (ssl->ConnectFilter) {
            wolfSSL_netfilter_decision_t res;
            if ((ssl->ConnectFilter(ssl, ssl->ConnectFilter_arg, &res) ==
                 WOLFSSL_SUCCESS) &&
                (res == WOLFSSL_NETFILTER_REJECT)) {
                WOLFSSL_ERROR(ssl->error = SOCKET_FILTERED_E);
                return WOLFSSL_FATAL_ERROR;
            }
        }
#endif /* WOLFSSL_WOLFSENTRY_HOOKS */

        if (ssl->options.side != WOLFSSL_CLIENT_END) {
            WOLFSSL_ERROR(ssl->error = SIDE_ERROR);
            return WOLFSSL_FATAL_ERROR;
        }

        #ifdef WOLFSSL_DTLS
        if (ssl->version.major == DTLS_MAJOR) {
            ssl->options.dtls   = 1;
            ssl->options.tls    = 1;
            ssl->options.tls1_1 = 1;
        }
        #endif

        if (ssl->buffers.outputBuffer.length > 0
        #ifdef WOLFSSL_ASYNC_CRYPT
            /* do not send buffered or advance state if last error was an
                async pending operation */
            && ssl->error != WC_PENDING_E
        #endif
        ) {
            if ( (ssl->error = SendBuffered(ssl)) == 0) {
                /* fragOffset is non-zero when sending fragments. On the last
                 * fragment, fragOffset is zero again, and the state can be
                 * advanced. */
                if (ssl->fragOffset == 0) {
                    ssl->options.connectState++;
                    WOLFSSL_MSG("connect state: "
                                "Advanced from last buffered fragment send");
                }
                else {
                    WOLFSSL_MSG("connect state: "
                                "Not advanced, more fragments to send");
                }
            }
            else {
                WOLFSSL_ERROR(ssl->error);
                return WOLFSSL_FATAL_ERROR;
            }
        }

        switch (ssl->options.connectState) {

        case CONNECT_BEGIN :
            /* always send client hello first */
            if ( (ssl->error = SendClientHello(ssl)) != 0) {
                WOLFSSL_ERROR(ssl->error);
                return WOLFSSL_FATAL_ERROR;
            }
            ssl->options.connectState = CLIENT_HELLO_SENT;
            WOLFSSL_MSG("connect state: CLIENT_HELLO_SENT");
            FALL_THROUGH;

        case CLIENT_HELLO_SENT :
            neededState = ssl->options.resuming ? SERVER_FINISHED_COMPLETE :
                                          SERVER_HELLODONE_COMPLETE;
            #ifdef WOLFSSL_DTLS
                /* In DTLS, when resuming, we can go straight to FINISHED,
                 * or do a cookie exchange and then skip to FINISHED, assume
                 * we need the cookie exchange first. */
                if (IsDtlsNotSctpMode(ssl))
                    neededState = SERVER_HELLOVERIFYREQUEST_COMPLETE;
            #endif
            /* get response */
            while (ssl->options.serverState < neededState) {
                #ifdef WOLFSSL_TLS13
                    if (ssl->options.tls1_3)
                        return wolfSSL_connect_TLSv13(ssl);
                #endif
                if ( (ssl->error = ProcessReply(ssl)) < 0) {
                    WOLFSSL_ERROR(ssl->error);
                    return WOLFSSL_FATAL_ERROR;
                }
                /* if resumption failed, reset needed state */
                else if (neededState == SERVER_FINISHED_COMPLETE)
                    if (!ssl->options.resuming) {
                        if (!IsDtlsNotSctpMode(ssl))
                            neededState = SERVER_HELLODONE_COMPLETE;
                        else
                            neededState = SERVER_HELLOVERIFYREQUEST_COMPLETE;
                    }
            }

            ssl->options.connectState = HELLO_AGAIN;
            WOLFSSL_MSG("connect state: HELLO_AGAIN");
            FALL_THROUGH;

        case HELLO_AGAIN :
            if (ssl->options.certOnly)
                return WOLFSSL_SUCCESS;

        #ifdef WOLFSSL_TLS13
            if (ssl->options.tls1_3)
                return wolfSSL_connect_TLSv13(ssl);
        #endif

            #ifdef WOLFSSL_DTLS
            if (ssl->options.serverState ==
                    SERVER_HELLOVERIFYREQUEST_COMPLETE) {
                if (IsDtlsNotSctpMode(ssl)) {
                    /* re-init hashes, exclude first hello and verify request */
                    if ((ssl->error = InitHandshakeHashes(ssl)) != 0) {
                        WOLFSSL_ERROR(ssl->error);
                        return WOLFSSL_FATAL_ERROR;
                    }
                    if ( (ssl->error = SendClientHello(ssl)) != 0) {
                        WOLFSSL_ERROR(ssl->error);
                        return WOLFSSL_FATAL_ERROR;
                    }
                }
            }
            #endif

            ssl->options.connectState = HELLO_AGAIN_REPLY;
            WOLFSSL_MSG("connect state: HELLO_AGAIN_REPLY");
            FALL_THROUGH;

        case HELLO_AGAIN_REPLY :
            #ifdef WOLFSSL_DTLS
                if (IsDtlsNotSctpMode(ssl)) {
                    neededState = ssl->options.resuming ?
                           SERVER_FINISHED_COMPLETE : SERVER_HELLODONE_COMPLETE;

                    /* get response */
                    while (ssl->options.serverState < neededState) {
                        if ( (ssl->error = ProcessReply(ssl)) < 0) {
                            WOLFSSL_ERROR(ssl->error);
                            return WOLFSSL_FATAL_ERROR;
                        }
                        /* if resumption failed, reset needed state */
                        if (neededState == SERVER_FINISHED_COMPLETE) {
                            if (!ssl->options.resuming)
                                neededState = SERVER_HELLODONE_COMPLETE;
                        }
                    }
                }
            #endif

            ssl->options.connectState = FIRST_REPLY_DONE;
            WOLFSSL_MSG("connect state: FIRST_REPLY_DONE");
            FALL_THROUGH;

        case FIRST_REPLY_DONE :
            #if !defined(NO_CERTS) && !defined(WOLFSSL_NO_CLIENT_AUTH)
                #ifdef WOLFSSL_TLS13
                    if (ssl->options.tls1_3)
                        return wolfSSL_connect_TLSv13(ssl);
                #endif
                if (ssl->options.sendVerify) {
                    if ( (ssl->error = SendCertificate(ssl)) != 0) {
                        WOLFSSL_ERROR(ssl->error);
                        return WOLFSSL_FATAL_ERROR;
                    }
                    WOLFSSL_MSG("sent: certificate");
                }

            #endif
            ssl->options.connectState = FIRST_REPLY_FIRST;
            WOLFSSL_MSG("connect state: FIRST_REPLY_FIRST");
            FALL_THROUGH;

        case FIRST_REPLY_FIRST :
        #ifdef WOLFSSL_TLS13
            if (ssl->options.tls1_3)
                return wolfSSL_connect_TLSv13(ssl);
        #endif
            if (!ssl->options.resuming) {
                if ( (ssl->error = SendClientKeyExchange(ssl)) != 0) {
                    WOLFSSL_ERROR(ssl->error);
                    return WOLFSSL_FATAL_ERROR;
                }
                WOLFSSL_MSG("sent: client key exchange");
            }

            ssl->options.connectState = FIRST_REPLY_SECOND;
            WOLFSSL_MSG("connect state: FIRST_REPLY_SECOND");
            FALL_THROUGH;

    #if !defined(WOLFSSL_NO_TLS12) || !defined(NO_OLD_TLS)
        case FIRST_REPLY_SECOND :
            #if !defined(NO_CERTS) && !defined(WOLFSSL_NO_CLIENT_AUTH)
                if (ssl->options.sendVerify) {
                    if ( (ssl->error = SendCertificateVerify(ssl)) != 0) {
                        WOLFSSL_ERROR(ssl->error);
                        return WOLFSSL_FATAL_ERROR;
                    }
                    WOLFSSL_MSG("sent: certificate verify");
                }
            #endif /* !NO_CERTS && !WOLFSSL_NO_CLIENT_AUTH */
            ssl->options.connectState = FIRST_REPLY_THIRD;
            WOLFSSL_MSG("connect state: FIRST_REPLY_THIRD");
            FALL_THROUGH;

        case FIRST_REPLY_THIRD :
            if ( (ssl->error = SendChangeCipher(ssl)) != 0) {
                WOLFSSL_ERROR(ssl->error);
                return WOLFSSL_FATAL_ERROR;
            }
            WOLFSSL_MSG("sent: change cipher spec");
            ssl->options.connectState = FIRST_REPLY_FOURTH;
            WOLFSSL_MSG("connect state: FIRST_REPLY_FOURTH");
            FALL_THROUGH;

        case FIRST_REPLY_FOURTH :
            if ( (ssl->error = SendFinished(ssl)) != 0) {
                WOLFSSL_ERROR(ssl->error);
                return WOLFSSL_FATAL_ERROR;
            }
            WOLFSSL_MSG("sent: finished");
            ssl->options.connectState = FINISHED_DONE;
            WOLFSSL_MSG("connect state: FINISHED_DONE");
            FALL_THROUGH;

        case FINISHED_DONE :
            /* get response */
            while (ssl->options.serverState < SERVER_FINISHED_COMPLETE)
                if ( (ssl->error = ProcessReply(ssl)) < 0) {
                    WOLFSSL_ERROR(ssl->error);
                    return WOLFSSL_FATAL_ERROR;
                }

            ssl->options.connectState = SECOND_REPLY_DONE;
            WOLFSSL_MSG("connect state: SECOND_REPLY_DONE");
            FALL_THROUGH;

        case SECOND_REPLY_DONE:
        #ifndef NO_HANDSHAKE_DONE_CB
            if (ssl->hsDoneCb) {
                int cbret = ssl->hsDoneCb(ssl, ssl->hsDoneCtx);
                if (cbret < 0) {
                    ssl->error = cbret;
                    WOLFSSL_MSG("HandShake Done Cb don't continue error");
                    return WOLFSSL_FATAL_ERROR;
                }
            }
        #endif /* NO_HANDSHAKE_DONE_CB */

            if (!ssl->options.dtls) {
                if (!ssl->options.keepResources) {
                    FreeHandshakeResources(ssl);
                }
            }
        #ifdef WOLFSSL_DTLS
            else {
                ssl->options.dtlsHsRetain = 1;
            }
        #endif /* WOLFSSL_DTLS */

        #if defined(WOLFSSL_ASYNC_CRYPT) && defined(HAVE_SECURE_RENEGOTIATION)
            /* This may be necessary in async so that we don't try to
             * renegotiate again */
            if (ssl->secure_renegotiation && ssl->secure_renegotiation->startScr) {
                ssl->secure_renegotiation->startScr = 0;
            }
        #endif /* WOLFSSL_ASYNC_CRYPT && HAVE_SECURE_RENEGOTIATION */

            WOLFSSL_LEAVE("SSL_connect()", WOLFSSL_SUCCESS);
            return WOLFSSL_SUCCESS;
    #endif /* !WOLFSSL_NO_TLS12 || !NO_OLD_TLS */

        default:
            WOLFSSL_MSG("Unknown connect state ERROR");
            return WOLFSSL_FATAL_ERROR; /* unknown connect state */
        }
    #endif /* !WOLFSSL_NO_TLS12 || !NO_OLD_TLS || !WOLFSSL_TLS13 */
    }

#endif /* NO_WOLFSSL_CLIENT */


/* server only parts */
#ifndef NO_WOLFSSL_SERVER

    #ifdef OPENSSL_EXTRA
    WOLFSSL_METHOD* wolfSSLv2_server_method(void)
    {
        WOLFSSL_STUB("wolfSSLv2_server_method");
        return 0;
    }
    #endif

    #if defined(WOLFSSL_ALLOW_SSLV3) && !defined(NO_OLD_TLS)
    WOLFSSL_METHOD* wolfSSLv3_server_method(void)
    {
        return wolfSSLv3_server_method_ex(NULL);
    }
    WOLFSSL_METHOD* wolfSSLv3_server_method_ex(void* heap)
    {
        WOLFSSL_METHOD* method =
                              (WOLFSSL_METHOD*) XMALLOC(sizeof(WOLFSSL_METHOD),
                                                     heap, DYNAMIC_TYPE_METHOD);
        (void)heap;
        WOLFSSL_ENTER("SSLv3_server_method_ex");
        if (method) {
            InitSSL_Method(method, MakeSSLv3());
            method->side = WOLFSSL_SERVER_END;
        }
        return method;
    }
    #endif /* WOLFSSL_ALLOW_SSLV3 && !NO_OLD_TLS */

    WOLFSSL_METHOD* wolfSSLv23_server_method(void)
    {
        return wolfSSLv23_server_method_ex(NULL);
    }

    WOLFSSL_METHOD* wolfSSLv23_server_method_ex(void* heap)
    {
        WOLFSSL_METHOD* method =
                              (WOLFSSL_METHOD*) XMALLOC(sizeof(WOLFSSL_METHOD),
                                                     heap, DYNAMIC_TYPE_METHOD);
        (void)heap;
        WOLFSSL_ENTER("SSLv23_server_method_ex");
        if (method) {
    #if !defined(NO_SHA256) || defined(WOLFSSL_SHA384) || defined(WOLFSSL_SHA512)
        #ifdef WOLFSSL_TLS13
            InitSSL_Method(method, MakeTLSv1_3());
        #elif !defined(WOLFSSL_NO_TLS12)
            InitSSL_Method(method, MakeTLSv1_2());
        #elif !defined(NO_OLD_TLS)
            InitSSL_Method(method, MakeTLSv1_1());
        #endif
    #else
        #ifndef NO_OLD_TLS
            InitSSL_Method(method, MakeTLSv1_1());
        #else
            #error Must have SHA256, SHA384 or SHA512 enabled for TLS 1.2
        #endif
    #endif
    #if !defined(NO_OLD_TLS) || defined(WOLFSSL_TLS13)
            method->downgrade = 1;
    #endif
            method->side      = WOLFSSL_SERVER_END;
        }
        return method;
    }


    WOLFSSL_ABI
    int wolfSSL_accept(WOLFSSL* ssl)
    {
#if !(defined(WOLFSSL_NO_TLS12) && defined(NO_OLD_TLS) && defined(WOLFSSL_TLS13))
        word16 havePSK = 0;
        word16 haveAnon = 0;
        word16 haveMcast = 0;
#endif

        if (ssl == NULL)
            return WOLFSSL_FATAL_ERROR;

    #if defined(OPENSSL_EXTRA) || defined(WOLFSSL_EITHER_SIDE)
        if (ssl->options.side == WOLFSSL_NEITHER_END) {
            WOLFSSL_MSG("Setting WOLFSSL_SSL to be server side");
            ssl->error = InitSSL_Side(ssl, WOLFSSL_SERVER_END);
            if (ssl->error != WOLFSSL_SUCCESS) {
                WOLFSSL_ERROR(ssl->error);
                return WOLFSSL_FATAL_ERROR;
            }
            ssl->error = 0; /* expected to be zero here */
        }
    #endif /* OPENSSL_EXTRA || WOLFSSL_EITHER_SIDE */

#if defined(WOLFSSL_NO_TLS12) && defined(NO_OLD_TLS) && defined(WOLFSSL_TLS13)
        return wolfSSL_accept_TLSv13(ssl);
#else
    #ifdef WOLFSSL_TLS13
        if (ssl->options.tls1_3)
            return wolfSSL_accept_TLSv13(ssl);
    #endif
        WOLFSSL_ENTER("SSL_accept()");

#ifdef WOLFSSL_WOLFSENTRY_HOOKS
        if (ssl->AcceptFilter) {
            wolfSSL_netfilter_decision_t res;
            if ((ssl->AcceptFilter(ssl, ssl->AcceptFilter_arg, &res) ==
                 WOLFSSL_SUCCESS) &&
                (res == WOLFSSL_NETFILTER_REJECT)) {
                WOLFSSL_ERROR(ssl->error = SOCKET_FILTERED_E);
                return WOLFSSL_FATAL_ERROR;
            }
        }
#endif /* WOLFSSL_WOLFSENTRY_HOOKS */

        #ifdef HAVE_ERRNO_H
            errno = 0;
        #endif

        #ifndef NO_PSK
            havePSK = ssl->options.havePSK;
        #endif
        (void)havePSK;

        #ifdef HAVE_ANON
            haveAnon = ssl->options.haveAnon;
        #endif
        (void)haveAnon;

        #ifdef WOLFSSL_MULTICAST
            haveMcast = ssl->options.haveMcast;
        #endif
        (void)haveMcast;

        if (ssl->options.side != WOLFSSL_SERVER_END) {
            WOLFSSL_ERROR(ssl->error = SIDE_ERROR);
            return WOLFSSL_FATAL_ERROR;
        }

    #ifndef NO_CERTS
        /* in case used set_accept_state after init */
        /* allow no private key if using PK callbacks and CB is set */
        if (!havePSK && !haveAnon && !haveMcast) {
            if (!ssl->buffers.certificate ||
                !ssl->buffers.certificate->buffer) {

                WOLFSSL_MSG("accept error: server cert required");
                WOLFSSL_ERROR(ssl->error = NO_PRIVATE_KEY);
                return WOLFSSL_FATAL_ERROR;
            }

        #ifdef HAVE_PK_CALLBACKS
            if (wolfSSL_CTX_IsPrivatePkSet(ssl->ctx)) {
                WOLFSSL_MSG("Using PK for server private key");
            }
            else
        #endif
            if (!ssl->buffers.key || !ssl->buffers.key->buffer) {
                WOLFSSL_MSG("accept error: server key required");
                WOLFSSL_ERROR(ssl->error = NO_PRIVATE_KEY);
                return WOLFSSL_FATAL_ERROR;
            }
        }
    #endif

    #ifdef WOLFSSL_DTLS
        if (ssl->version.major == DTLS_MAJOR) {
            ssl->options.dtls   = 1;
            ssl->options.tls    = 1;
            ssl->options.tls1_1 = 1;
        }
    #endif

        if (ssl->buffers.outputBuffer.length > 0
        #ifdef WOLFSSL_ASYNC_CRYPT
            /* do not send buffered or advance state if last error was an
                async pending operation */
            && ssl->error != WC_PENDING_E
        #endif
        ) {
            if ( (ssl->error = SendBuffered(ssl)) == 0) {
                /* fragOffset is non-zero when sending fragments. On the last
                 * fragment, fragOffset is zero again, and the state can be
                 * advanced. */
                if (ssl->fragOffset == 0) {
                    ssl->options.acceptState++;
                    WOLFSSL_MSG("accept state: "
                                "Advanced from last buffered fragment send");
                }
                else {
                    WOLFSSL_MSG("accept state: "
                                "Not advanced, more fragments to send");
                }
            }
            else {
                WOLFSSL_ERROR(ssl->error);
                return WOLFSSL_FATAL_ERROR;
            }
        }

        switch (ssl->options.acceptState) {

        case ACCEPT_BEGIN :
#ifdef HAVE_SECURE_RENEGOTIATION
        case ACCEPT_BEGIN_RENEG:
#endif
            /* get response */
            while (ssl->options.clientState < CLIENT_HELLO_COMPLETE)
                if ( (ssl->error = ProcessReply(ssl)) < 0) {
                    WOLFSSL_ERROR(ssl->error);
                    return WOLFSSL_FATAL_ERROR;
                }
#ifdef WOLFSSL_TLS13
            ssl->options.acceptState = ACCEPT_CLIENT_HELLO_DONE;
            WOLFSSL_MSG("accept state ACCEPT_CLIENT_HELLO_DONE");
            FALL_THROUGH;

        case ACCEPT_CLIENT_HELLO_DONE :
            if (ssl->options.tls1_3) {
                return wolfSSL_accept_TLSv13(ssl);
            }
#endif
            ssl->options.acceptState = ACCEPT_FIRST_REPLY_DONE;
            WOLFSSL_MSG("accept state ACCEPT_FIRST_REPLY_DONE");
            FALL_THROUGH;

        case ACCEPT_FIRST_REPLY_DONE :
            if ( (ssl->error = SendServerHello(ssl)) != 0) {
                WOLFSSL_ERROR(ssl->error);
                return WOLFSSL_FATAL_ERROR;
            }
            ssl->options.acceptState = SERVER_HELLO_SENT;
            WOLFSSL_MSG("accept state SERVER_HELLO_SENT");
            FALL_THROUGH;

        case SERVER_HELLO_SENT :
        #ifdef WOLFSSL_TLS13
            if (ssl->options.tls1_3) {
                return wolfSSL_accept_TLSv13(ssl);
            }
        #endif
            #ifndef NO_CERTS
                if (!ssl->options.resuming)
                    if ( (ssl->error = SendCertificate(ssl)) != 0) {
                        WOLFSSL_ERROR(ssl->error);
                        return WOLFSSL_FATAL_ERROR;
                    }
            #endif
            ssl->options.acceptState = CERT_SENT;
            WOLFSSL_MSG("accept state CERT_SENT");
            FALL_THROUGH;

        case CERT_SENT :
            #ifndef NO_CERTS
            if (!ssl->options.resuming)
                if ( (ssl->error = SendCertificateStatus(ssl)) != 0) {
                    WOLFSSL_ERROR(ssl->error);
                    return WOLFSSL_FATAL_ERROR;
                }
            #endif
            ssl->options.acceptState = CERT_STATUS_SENT;
            WOLFSSL_MSG("accept state CERT_STATUS_SENT");
            FALL_THROUGH;

        case CERT_STATUS_SENT :
        #ifdef WOLFSSL_TLS13
            if (ssl->options.tls1_3) {
                return wolfSSL_accept_TLSv13(ssl);
            }
        #endif
            if (!ssl->options.resuming)
                if ( (ssl->error = SendServerKeyExchange(ssl)) != 0) {
                    WOLFSSL_ERROR(ssl->error);
                    return WOLFSSL_FATAL_ERROR;
                }
            ssl->options.acceptState = KEY_EXCHANGE_SENT;
            WOLFSSL_MSG("accept state KEY_EXCHANGE_SENT");
            FALL_THROUGH;

        case KEY_EXCHANGE_SENT :
            #ifndef NO_CERTS
                if (!ssl->options.resuming) {
                    if (ssl->options.verifyPeer) {
                        if ( (ssl->error = SendCertificateRequest(ssl)) != 0) {
                            WOLFSSL_ERROR(ssl->error);
                            return WOLFSSL_FATAL_ERROR;
                        }
                    }
                }
            #endif
            ssl->options.acceptState = CERT_REQ_SENT;
            WOLFSSL_MSG("accept state CERT_REQ_SENT");
            FALL_THROUGH;

        case CERT_REQ_SENT :
            if (!ssl->options.resuming)
                if ( (ssl->error = SendServerHelloDone(ssl)) != 0) {
                    WOLFSSL_ERROR(ssl->error);
                    return WOLFSSL_FATAL_ERROR;
                }
            ssl->options.acceptState = SERVER_HELLO_DONE;
            WOLFSSL_MSG("accept state SERVER_HELLO_DONE");
            FALL_THROUGH;

        case SERVER_HELLO_DONE :
            if (!ssl->options.resuming) {
                while (ssl->options.clientState < CLIENT_FINISHED_COMPLETE)
                    if ( (ssl->error = ProcessReply(ssl)) < 0) {
                        WOLFSSL_ERROR(ssl->error);
                        return WOLFSSL_FATAL_ERROR;
                    }
            }
            ssl->options.acceptState = ACCEPT_SECOND_REPLY_DONE;
            WOLFSSL_MSG("accept state  ACCEPT_SECOND_REPLY_DONE");
            FALL_THROUGH;

        case ACCEPT_SECOND_REPLY_DONE :
#ifdef HAVE_SESSION_TICKET
            if (ssl->options.createTicket && !ssl->options.noTicketTls12) {
                if ( (ssl->error = SendTicket(ssl)) != 0) {
                    WOLFSSL_ERROR(ssl->error);
                    return WOLFSSL_FATAL_ERROR;
                }
            }
#endif /* HAVE_SESSION_TICKET */
            ssl->options.acceptState = TICKET_SENT;
            WOLFSSL_MSG("accept state  TICKET_SENT");
            FALL_THROUGH;

        case TICKET_SENT:
            if ( (ssl->error = SendChangeCipher(ssl)) != 0) {
                WOLFSSL_ERROR(ssl->error);
                return WOLFSSL_FATAL_ERROR;
            }
            ssl->options.acceptState = CHANGE_CIPHER_SENT;
            WOLFSSL_MSG("accept state  CHANGE_CIPHER_SENT");
            FALL_THROUGH;

        case CHANGE_CIPHER_SENT :
            if ( (ssl->error = SendFinished(ssl)) != 0) {
                WOLFSSL_ERROR(ssl->error);
                return WOLFSSL_FATAL_ERROR;
            }

            ssl->options.acceptState = ACCEPT_FINISHED_DONE;
            WOLFSSL_MSG("accept state ACCEPT_FINISHED_DONE");
            FALL_THROUGH;

        case ACCEPT_FINISHED_DONE :
            if (ssl->options.resuming)
                while (ssl->options.clientState < CLIENT_FINISHED_COMPLETE)
                    if ( (ssl->error = ProcessReply(ssl)) < 0) {
                        WOLFSSL_ERROR(ssl->error);
                        return WOLFSSL_FATAL_ERROR;
                    }

            ssl->options.acceptState = ACCEPT_THIRD_REPLY_DONE;
            WOLFSSL_MSG("accept state ACCEPT_THIRD_REPLY_DONE");
            FALL_THROUGH;

        case ACCEPT_THIRD_REPLY_DONE :
#ifndef NO_HANDSHAKE_DONE_CB
            if (ssl->hsDoneCb) {
                int cbret = ssl->hsDoneCb(ssl, ssl->hsDoneCtx);
                if (cbret < 0) {
                    ssl->error = cbret;
                    WOLFSSL_MSG("HandShake Done Cb don't continue error");
                    return WOLFSSL_FATAL_ERROR;
                }
            }
#endif /* NO_HANDSHAKE_DONE_CB */

            if (!ssl->options.dtls) {
                if (!ssl->options.keepResources) {
                    FreeHandshakeResources(ssl);
                }
            }
#ifdef WOLFSSL_DTLS
            else {
                ssl->options.dtlsHsRetain = 1;
            }
#endif /* WOLFSSL_DTLS */

#if defined(WOLFSSL_ASYNC_CRYPT) && defined(HAVE_SECURE_RENEGOTIATION)
            /* This may be necessary in async so that we don't try to
             * renegotiate again */
            if (ssl->secure_renegotiation && ssl->secure_renegotiation->startScr) {
                ssl->secure_renegotiation->startScr = 0;
            }
#endif /* WOLFSSL_ASYNC_CRYPT && HAVE_SECURE_RENEGOTIATION */

#ifdef WOLFSSL_SESSION_EXPORT
            if (ssl->dtls_export) {
                if ((ssl->error = wolfSSL_send_session(ssl)) != 0) {
                    WOLFSSL_MSG("Export DTLS session error");
                    WOLFSSL_ERROR(ssl->error);
                    return WOLFSSL_FATAL_ERROR;
                }
            }
#endif

            WOLFSSL_LEAVE("SSL_accept()", WOLFSSL_SUCCESS);
            return WOLFSSL_SUCCESS;

        default :
            WOLFSSL_MSG("Unknown accept state ERROR");
            return WOLFSSL_FATAL_ERROR;
        }
#endif /* !WOLFSSL_NO_TLS12 */
    }

#endif /* NO_WOLFSSL_SERVER */


#ifndef NO_HANDSHAKE_DONE_CB

int wolfSSL_SetHsDoneCb(WOLFSSL* ssl, HandShakeDoneCb cb, void* user_ctx)
{
    WOLFSSL_ENTER("wolfSSL_SetHsDoneCb");

    if (ssl == NULL)
        return BAD_FUNC_ARG;

    ssl->hsDoneCb  = cb;
    ssl->hsDoneCtx = user_ctx;


    return WOLFSSL_SUCCESS;
}

#endif /* NO_HANDSHAKE_DONE_CB */

WOLFSSL_ABI
int wolfSSL_Cleanup(void)
{
    int ret = WOLFSSL_SUCCESS;
    int release = 0;

    WOLFSSL_ENTER("wolfSSL_Cleanup");

    if (initRefCount == 0)
        return ret;  /* possibly no init yet, but not failure either way */

    if (wc_LockMutex(&count_mutex) != 0) {
        WOLFSSL_MSG("Bad Lock Mutex count");
        return BAD_MUTEX_E;
    }

    release = initRefCount-- == 1;
    if (initRefCount < 0)
        initRefCount = 0;

    wc_UnLockMutex(&count_mutex);

    if (!release)
        return ret;

#ifdef OPENSSL_EXTRA
    if (bn_one) {
        wolfSSL_BN_free(bn_one);
        bn_one = NULL;
    }
#endif

#ifndef NO_SESSION_CACHE
    if (wc_FreeMutex(&session_mutex) != 0)
        ret = BAD_MUTEX_E;
#endif
    if (wc_FreeMutex(&count_mutex) != 0)
        ret = BAD_MUTEX_E;

#ifdef OPENSSL_EXTRA
    wolfSSL_RAND_Cleanup();
#endif

    if (wolfCrypt_Cleanup() != 0) {
        WOLFSSL_MSG("Error with wolfCrypt_Cleanup call");
        ret = WC_CLEANUP_E;
    }

#ifdef HAVE_GLOBAL_RNG
    if (wc_FreeMutex(&globalRNGMutex) != 0) {
        ret = BAD_MUTEX_E;
    }
#endif
    return ret;
}


#ifndef NO_SESSION_CACHE


/* some session IDs aren't random after all, let's make them random */
static WC_INLINE word32 HashSession(const byte* sessionID, word32 len, int* error)
{
    byte digest[WC_MAX_DIGEST_SIZE];

#ifndef NO_MD5
    *error =  wc_Md5Hash(sessionID, len, digest);
#elif !defined(NO_SHA)
    *error =  wc_ShaHash(sessionID, len, digest);
#elif !defined(NO_SHA256)
    *error =  wc_Sha256Hash(sessionID, len, digest);
#else
    #error "We need a digest to hash the session IDs"
#endif

    return *error == 0 ? MakeWordFromHash(digest) : 0; /* 0 on failure */
}


WOLFSSL_ABI
void wolfSSL_flush_sessions(WOLFSSL_CTX* ctx, long tm)
{
    /* static table now, no flushing needed */
    (void)ctx;
    (void)tm;
}


/* set ssl session timeout in seconds */
WOLFSSL_ABI
int wolfSSL_set_timeout(WOLFSSL* ssl, unsigned int to)
{
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    if (to == 0)
        to = WOLFSSL_SESSION_TIMEOUT;
    ssl->timeout = to;

    return WOLFSSL_SUCCESS;
}


/**
 * Sets ctx session timeout in seconds.
 * The timeout value set here should be reflected in the
 * "session ticket lifetime hint" if this API works in the openssl compat-layer.
 * Therefore wolfSSL_CTX_set_TicketHint is called internally.
 * Arguments:
 *  - ctx  WOLFSSL_CTX object which the timeout is set to
 *  - to   timeout value in second
 * Returns:
 *  WOLFSSL_SUCCESS on success, BAD_FUNC_ARG on failure.
 *  When WOLFSSL_ERROR_CODE_OPENSSL is defined, returns previous timeout value
 *  on success, BAD_FUNC_ARG on failure.
 */
WOLFSSL_ABI
int wolfSSL_CTX_set_timeout(WOLFSSL_CTX* ctx, unsigned int to)
{
    #if defined(WOLFSSL_ERROR_CODE_OPENSSL)
    word32 prev_timeout;
    #endif

    int ret = WOLFSSL_SUCCESS;
    (void)ret;

    if (ctx == NULL)
        ret = BAD_FUNC_ARG;

    if (ret == WOLFSSL_SUCCESS) {
    #if defined(WOLFSSL_ERROR_CODE_OPENSSL)
        prev_timeout = ctx->timeout;
    #endif
        if (to == 0) {
            ctx->timeout = WOLFSSL_SESSION_TIMEOUT;
        }
        else {
            ctx->timeout = to;
        }
    }
#if defined(OPENSSL_EXTRA) && defined(HAVE_SESSION_TICKET) && \
   !defined(NO_WOLFSSL_SERVER)
    if (ret == WOLFSSL_SUCCESS) {
        if (to == 0) {
            ret = wolfSSL_CTX_set_TicketHint(ctx, SESSION_TICKET_HINT_DEFAULT);
        }
        else {
            ret = wolfSSL_CTX_set_TicketHint(ctx, to);
        }
    }
#endif /* OPENSSL_EXTRA && HAVE_SESSION_TICKET && !NO_WOLFSSL_SERVER */

#if defined(WOLFSSL_ERROR_CODE_OPENSSL)
    if (ret == WOLFSSL_SUCCESS) {
        return prev_timeout;
    }
    else {
        return ret;
    }
#else
    return ret;
#endif /* WOLFSSL_ERROR_CODE_OPENSSL */
}


#ifndef NO_CLIENT_CACHE

/* Get Session from Client cache based on id/len, return NULL on failure */
WOLFSSL_SESSION* GetSessionClient(WOLFSSL* ssl, const byte* id, int len)
{
    WOLFSSL_SESSION* ret = NULL;
    word32          row;
    int             idx;
    int             count;
    int             error = 0;

    WOLFSSL_ENTER("GetSessionClient");

    if (ssl->ctx->sessionCacheOff)
        return NULL;

    if (ssl->options.side == WOLFSSL_SERVER_END)
        return NULL;

    len = min(SERVER_ID_LEN, (word32)len);

#ifdef HAVE_EXT_CACHE
    if (ssl->ctx->get_sess_cb != NULL) {
        int copy = 0;
        ret = ssl->ctx->get_sess_cb(ssl, (byte*)id, len, &copy);
        if (ret != NULL)
            return ret;
    }

    if (ssl->ctx->internalCacheOff)
        return NULL;
#endif

    row = HashSession(id, len, &error) % SESSION_ROWS;
    if (error != 0) {
        WOLFSSL_MSG("Hash session failed");
        return NULL;
    }

    if (wc_LockMutex(&session_mutex) != 0) {
        WOLFSSL_MSG("Lock session mutex failed");
        return NULL;
    }

    /* start from most recently used */
    count = min((word32)ClientCache[row].totalCount, SESSIONS_PER_ROW);
    idx = ClientCache[row].nextIdx - 1;
    if (idx < 0)
        idx = SESSIONS_PER_ROW - 1; /* if back to front, the previous was end */

    for (; count > 0; --count) {
        WOLFSSL_SESSION* current;
        ClientSession   clSess;

        if (idx >= SESSIONS_PER_ROW || idx < 0) { /* sanity check */
            WOLFSSL_MSG("Bad idx");
            break;
        }

        clSess = ClientCache[row].Clients[idx];

        current = &SessionCache[clSess.serverRow].Sessions[clSess.serverIdx];
        if (XMEMCMP(current->serverID, id, len) == 0) {
            WOLFSSL_MSG("Found a serverid match for client");
            if (LowResTimer() < (current->bornOn + current->timeout)) {
                WOLFSSL_MSG("Session valid");
                ret = current;
                break;
            } else {
                WOLFSSL_MSG("Session timed out");  /* could have more for id */
            }
        } else {
            WOLFSSL_MSG("ServerID not a match from client table");
        }

        idx = idx ? idx - 1 : SESSIONS_PER_ROW - 1;
    }

    wc_UnLockMutex(&session_mutex);

    return ret;
}

#endif /* NO_CLIENT_CACHE */

/* Restore the master secret and session information for certificates.
 *
 * ssl                  The SSL/TLS object.
 * session              The cached session to restore.
 * masterSecret         The master secret from the cached session.
 * restoreSessionCerts  Restoring session certificates is required.
 */
static WC_INLINE void RestoreSession(WOLFSSL* ssl, WOLFSSL_SESSION* session,
        byte* masterSecret, byte restoreSessionCerts)
{
    (void)ssl;
    (void)restoreSessionCerts;

    if (masterSecret)
        XMEMCPY(masterSecret, session->masterSecret, SECRET_LEN);
#ifdef SESSION_CERTS
    /* If set, we should copy the session certs into the ssl object
     * from the session we are returning so we can resume */
    if (restoreSessionCerts) {
        ssl->session.chain        = session->chain;
        ssl->session.version      = session->version;
    #ifdef NO_RESUME_SUITE_CHECK
        ssl->session.cipherSuite0 = session->cipherSuite0;
        ssl->session.cipherSuite  = session->cipherSuite;
    #endif
    }
#endif /* SESSION_CERTS */
#if !defined(NO_RESUME_SUITE_CHECK) || \
                        (defined(WOLFSSL_TLS13) && defined(HAVE_SESSION_TICKET))
    ssl->session.cipherSuite0 = session->cipherSuite0;
    ssl->session.cipherSuite  = session->cipherSuite;
#endif
}

WOLFSSL_SESSION* GetSession(WOLFSSL* ssl, byte* masterSecret,
        byte restoreSessionCerts)
{
    WOLFSSL_SESSION* ret = 0;
    const byte*  id = NULL;
    word32       row;
    int          idx;
    int          count;
    int          error = 0;

    (void)       restoreSessionCerts;

    if (ssl->options.sessionCacheOff)
        return NULL;

    if (ssl->options.haveSessionId == 0)
        return NULL;

#ifdef HAVE_SESSION_TICKET
    if (ssl->options.side == WOLFSSL_SERVER_END && ssl->options.useTicket == 1)
        return NULL;
#endif

    if (!ssl->options.tls1_3 && ssl->arrays != NULL)
        id = ssl->arrays->sessionID;
    else
        id = ssl->session.sessionID;

#ifdef HAVE_EXT_CACHE
    if (ssl->ctx->get_sess_cb != NULL) {
        int copy = 0;
        /* Attempt to retrieve the session from the external cache. */
        ret = ssl->ctx->get_sess_cb(ssl, (byte*)id, ID_LEN, &copy);
        if (ret != NULL) {
            RestoreSession(ssl, ret, masterSecret, restoreSessionCerts);
            return ret;
        }
    }

    if (ssl->ctx->internalCacheOff)
        return NULL;
#endif

    row = HashSession(id, ID_LEN, &error) % SESSION_ROWS;
    if (error != 0) {
        WOLFSSL_MSG("Hash session failed");
        return NULL;
    }

    if (wc_LockMutex(&session_mutex) != 0)
        return 0;

    /* start from most recently used */
    count = min((word32)SessionCache[row].totalCount, SESSIONS_PER_ROW);
    idx = SessionCache[row].nextIdx - 1;
    if (idx < 0)
        idx = SESSIONS_PER_ROW - 1; /* if back to front, the previous was end */

    for (; count > 0; --count) {
        WOLFSSL_SESSION* current;

        if (idx >= SESSIONS_PER_ROW || idx < 0) { /* sanity check */
            WOLFSSL_MSG("Bad idx");
            break;
        }

        current = &SessionCache[row].Sessions[idx];
        if (XMEMCMP(current->sessionID, id, ID_LEN) == 0 &&
                current->side == ssl->options.side) {
            WOLFSSL_MSG("Found a session match");
            if (LowResTimer() < (current->bornOn + current->timeout)) {
                WOLFSSL_MSG("Session valid");
                ret = current;
                RestoreSession(ssl, ret, masterSecret, restoreSessionCerts);
            } else {
                WOLFSSL_MSG("Session timed out");
            }
            break;  /* no more sessionIDs whether valid or not that match */
        } else {
            WOLFSSL_MSG("SessionID not a match at this idx");
        }

        idx = idx ? idx - 1 : SESSIONS_PER_ROW - 1;
    }

    wc_UnLockMutex(&session_mutex);

    return ret;
}


static int GetDeepCopySession(WOLFSSL* ssl, WOLFSSL_SESSION* copyFrom)
{
    WOLFSSL_SESSION* copyInto = &ssl->session;
    void* tmpBuff             = NULL;
    int ticketLen             = 0;
    int doDynamicCopy         = 0;
    int ret                   = WOLFSSL_SUCCESS;

    (void)ticketLen;
    (void)doDynamicCopy;
    (void)tmpBuff;

    if (!ssl || !copyFrom)
        return BAD_FUNC_ARG;

#ifdef HAVE_SESSION_TICKET
    /* Free old dynamic ticket if we had one to avoid leak */
    if (copyInto->isDynamic) {
        XFREE(copyInto->ticket, ssl->heap, DYNAMIC_TYPE_SESSION_TICK);
        copyInto->ticket = copyInto->staticTicket;
        copyInto->isDynamic = 0;
    }
#endif

    if (wc_LockMutex(&session_mutex) != 0)
        return BAD_MUTEX_E;

#ifdef HAVE_SESSION_TICKET
    /* Size of ticket to alloc if needed; Use later for alloc outside lock */
    doDynamicCopy = copyFrom->isDynamic;
    ticketLen = copyFrom->ticketLen;
#endif

    *copyInto = *copyFrom;

    /* Default ticket to non dynamic. This will avoid crash if we fail below */
#ifdef HAVE_SESSION_TICKET
    copyInto->ticket = copyInto->staticTicket;
    copyInto->isDynamic = 0;
#endif

#ifndef NO_RESUME_SUITE_CHECK
    copyInto->cipherSuite0   = copyFrom->cipherSuite0;
    copyInto->cipherSuite    = copyFrom->cipherSuite;
#endif

    if (wc_UnLockMutex(&session_mutex) != 0) {
        return BAD_MUTEX_E;
    }

#ifdef HAVE_SESSION_TICKET
#ifdef WOLFSSL_TLS13
    if (wc_LockMutex(&session_mutex) != 0) {
        XFREE(tmpBuff, ssl->heap, DYNAMIC_TYPE_SESSION_TICK);
        return BAD_MUTEX_E;
    }

#ifdef NO_RESUME_SUITE_CHECK
    copyInto->cipherSuite0   = copyFrom->cipherSuite0;
    copyInto->cipherSuite    = copyFrom->cipherSuite;
#endif
    copyInto->namedGroup     = copyFrom->namedGroup;
    copyInto->ticketSeen     = copyFrom->ticketSeen;
    copyInto->ticketAdd      = copyFrom->ticketAdd;
    copyInto->side           = copyFrom->side;
    XMEMCPY(&copyInto->ticketNonce, &copyFrom->ticketNonce,
                                                           sizeof(TicketNonce));
#ifdef WOLFSSL_EARLY_DATA
    copyInto->maxEarlyDataSz = copyFrom->maxEarlyDataSz;
#endif
    XMEMCPY(copyInto->masterSecret, copyFrom->masterSecret, SECRET_LEN);

    if (wc_UnLockMutex(&session_mutex) != 0) {
        if (ret == WOLFSSL_SUCCESS)
            ret = BAD_MUTEX_E;
    }
#endif
    /* If doing dynamic copy, need to alloc outside lock, then inside a lock
     * confirm the size still matches and memcpy */
    if (doDynamicCopy) {
        tmpBuff = (byte*)XMALLOC(ticketLen, ssl->heap,
                                                     DYNAMIC_TYPE_SESSION_TICK);
        if (!tmpBuff)
            return MEMORY_ERROR;

        if (wc_LockMutex(&session_mutex) != 0) {
            XFREE(tmpBuff, ssl->heap, DYNAMIC_TYPE_SESSION_TICK);
            return BAD_MUTEX_E;
        }

        if ((word16)ticketLen != copyFrom->ticketLen) {
            /* Another thread modified the ssl-> session ticket during alloc.
             * Treat as error, since ticket different than when copy requested */
            ret = VAR_STATE_CHANGE_E;
        }

        if (ret == WOLFSSL_SUCCESS) {
            copyInto->ticket = (byte*)tmpBuff;
            copyInto->isDynamic = 1;
            XMEMCPY(copyInto->ticket, copyFrom->ticket, ticketLen);
        }
    } else {
        /* Need to ensure ticket pointer gets updated to own buffer
         * and is not pointing to buff of session copied from */
        copyInto->ticket = copyInto->staticTicket;
    }

    if (doDynamicCopy) {
        if (wc_UnLockMutex(&session_mutex) != 0) {
            if (ret == WOLFSSL_SUCCESS)
                ret = BAD_MUTEX_E;
        }
    }

    if (ret != WOLFSSL_SUCCESS) {
        /* cleanup */
        if (tmpBuff)
            XFREE(tmpBuff, ssl->heap, DYNAMIC_TYPE_SESSION_TICK);
        copyInto->ticket = copyInto->staticTicket;
        copyInto->isDynamic = 0;
    }
#endif /* HAVE_SESSION_TICKET */
    return ret;
}


int SetSession(WOLFSSL* ssl, WOLFSSL_SESSION* session)
{
    if (ssl == NULL || ssl->options.sessionCacheOff)
        return WOLFSSL_FAILURE;

#ifdef OPENSSL_EXTRA
    /* check for application context id */
    if (ssl->sessionCtxSz > 0) {
        if (XMEMCMP(ssl->sessionCtx, session->sessionCtx, ssl->sessionCtxSz)) {
            /* context id did not match! */
            WOLFSSL_MSG("Session context did not match");
            return SSL_FAILURE;
        }
    }
#endif /* OPENSSL_EXTRA */

    if (LowResTimer() < (session->bornOn + session->timeout)) {
        int ret = GetDeepCopySession(ssl, session);
        if (ret == WOLFSSL_SUCCESS) {
            ssl->options.resuming = 1;

#if defined(SESSION_CERTS) || (defined(WOLFSSL_TLS13) && \
                               defined(HAVE_SESSION_TICKET))
            ssl->version              = session->version;
#endif
#if defined(SESSION_CERTS) || !defined(NO_RESUME_SUITE_CHECK) || \
                        (defined(WOLFSSL_TLS13) && defined(HAVE_SESSION_TICKET))
            ssl->options.cipherSuite0 = session->cipherSuite0;
            ssl->options.cipherSuite  = session->cipherSuite;
#endif
        }

        return ret;
    }
    else {
#if defined(OPENSSL_EXTRA) && defined(WOLFSSL_ERROR_CODE_OPENSSL)
        WOLFSSL_MSG("Session is expired but return success for \
                              OpenSSL compatibility");
        return WOLFSSL_SUCCESS;
#endif /* OPENSSL_EXTRA && WOLFSSL_ERROR_CODE_OPENSSL */
        return WOLFSSL_FAILURE;  /* session timed out */
    }
}


#ifdef WOLFSSL_SESSION_STATS
static int get_locked_session_stats(word32* active, word32* total,
                                    word32* peak);
#endif

int AddSession(WOLFSSL* ssl)
{
    word32 row = 0;
    word32 idx = 0;
    int    error = 0;
    const byte* id = NULL;
#ifdef HAVE_SESSION_TICKET
    byte*  tmpBuff = NULL;
    int    ticLen  = 0;
#endif
    WOLFSSL_SESSION* session;
    int i;
    int overwrite = 0;
#ifdef HAVE_EXT_CACHE
    int cbRet = 0;
#endif

    if (ssl->options.sessionCacheOff)
        return 0;

    if (ssl->options.haveSessionId == 0)
        return 0;

#ifdef HAVE_SESSION_TICKET
    if (ssl->options.side == WOLFSSL_SERVER_END && ssl->options.useTicket == 1)
        return 0;
#endif

#if defined(WOLFSSL_TLS13) && defined(HAVE_SESSION_TICKET)
    if (ssl->options.tls1_3)
        id = ssl->session.sessionID;
    else
#endif
    if (ssl->arrays)
        id = ssl->arrays->sessionID;
    if (id == NULL) {
        return BAD_FUNC_ARG;
    }

#ifdef HAVE_SESSION_TICKET
    ticLen = ssl->session.ticketLen;
    /* Alloc Memory here so if Malloc fails can exit outside of lock */
    if (ticLen > SESSION_TICKET_LEN) {
        tmpBuff = (byte*)XMALLOC(ticLen, ssl->heap,
                DYNAMIC_TYPE_SESSION_TICK);
        if(!tmpBuff)
            return MEMORY_E;
    }
#endif

#ifdef HAVE_EXT_CACHE
    if (ssl->options.internalCacheOff) {
        /* Create a new session object to be stored. */
        session = wolfSSL_SESSION_new();
        if (session == NULL) {
#ifdef HAVE_SESSION_TICKET
            XFREE(tmpBuff, ssl->heap, DYNAMIC_TYPE_SESSION_TICK);
#endif
            return MEMORY_E;
        }
    }
    else
#endif
    {
        /* Use the session object in the cache for external cache if required.
         */
        row = HashSession(id, ID_LEN, &error) % SESSION_ROWS;
        if (error != 0) {
            WOLFSSL_MSG("Hash session failed");
#ifdef HAVE_SESSION_TICKET
            XFREE(tmpBuff, ssl->heap, DYNAMIC_TYPE_SESSION_TICK);
#endif
            return error;
        }

        if (wc_LockMutex(&session_mutex) != 0) {
#ifdef HAVE_SESSION_TICKET
            XFREE(tmpBuff, ssl->heap, DYNAMIC_TYPE_SESSION_TICK);
#endif
            return BAD_MUTEX_E;
        }

        for (i=0; i<SESSIONS_PER_ROW; i++) {
            if (XMEMCMP(id, SessionCache[row].Sessions[i].sessionID, ID_LEN) == 0 &&
                    SessionCache[row].Sessions[i].side == ssl->options.side) {
                WOLFSSL_MSG("Session already exists. Overwriting.");
                overwrite = 1;
                idx = i;
                break;
            }
        }

        if (!overwrite) {
            idx = SessionCache[row].nextIdx++;
        }
#ifdef SESSION_INDEX
        ssl->sessionIndex = (row << SESSIDX_ROW_SHIFT) | idx;
#endif
        session = &SessionCache[row].Sessions[idx];
    }

    session->side = (byte)ssl->options.side;

#ifdef WOLFSSL_TLS13
    if (ssl->options.tls1_3) {
        XMEMCPY(session->masterSecret, ssl->session.masterSecret, SECRET_LEN);
        session->sessionIDSz = ID_LEN;
    }
    else
#endif
    {
        XMEMCPY(session->masterSecret, ssl->arrays->masterSecret, SECRET_LEN);
        session->sessionIDSz = ssl->arrays->sessionIDSz;
    }
    XMEMCPY(session->sessionID, id, ID_LEN);
    session->haveEMS = ssl->options.haveEMS;

#ifdef OPENSSL_EXTRA
    /* If using compatibility layer then check for and copy over session context
     * id. */
    if (ssl->sessionCtxSz > 0 && ssl->sessionCtxSz < ID_LEN) {
        XMEMCPY(session->sessionCtx, ssl->sessionCtx, ssl->sessionCtxSz);
    }
#endif

    session->timeout = ssl->timeout;
    session->bornOn  = LowResTimer();

#ifdef HAVE_SESSION_TICKET
    /* Check if another thread modified ticket since alloc */
    if ((word16)ticLen != ssl->session.ticketLen) {
        error = VAR_STATE_CHANGE_E;
    }

    if (error == 0) {
        /* Cleanup cache row's old Dynamic buff if exists */
        if (session->isDynamic) {
            XFREE(session->ticket, ssl->heap, DYNAMIC_TYPE_SESSION_TICK);
            session->ticket = NULL;
        }

        /* If too large to store in static buffer, use dyn buffer */
        if (ticLen > SESSION_TICKET_LEN) {
            session->ticket = tmpBuff;
            session->isDynamic = 1;
        } else {
            session->ticket = session->staticTicket;
            session->isDynamic = 0;
        }

        session->ticketLen = (word16)ticLen;
        XMEMCPY(session->ticket, ssl->session.ticket, ticLen);
    } else { /* cleanup, reset state */
        session->ticket    = session->staticTicket;
        session->isDynamic = 0;
        session->ticketLen = 0;
        if (tmpBuff) {
            XFREE(tmpBuff, ssl->heap, DYNAMIC_TYPE_SESSION_TICK);
            tmpBuff = NULL;
        }
    }
#endif

#ifdef SESSION_CERTS
    if (error == 0) {
        if (!overwrite || ssl->session.chain.count > 0) {
            /*
             * If we are overwriting and no certs present in ssl->session.chain
             * then keep the old chain.
             */
            session->chain.count = ssl->session.chain.count;
            XMEMCPY(session->chain.certs, ssl->session.chain.certs,
                    sizeof(x509_buffer) * session->chain.count);
        }
    }
#endif /* SESSION_CERTS */
#if defined(SESSION_CERTS) || (defined(WOLFSSL_TLS13) && \
                               defined(HAVE_SESSION_TICKET))
    if (error == 0) {
        session->version      = ssl->version;
    }
#endif /* SESSION_CERTS || (WOLFSSL_TLS13 & HAVE_SESSION_TICKET) */
#if defined(SESSION_CERTS) || !defined(NO_RESUME_SUITE_CHECK) || \
                        (defined(WOLFSSL_TLS13) && defined(HAVE_SESSION_TICKET))
    if (error == 0) {
        session->cipherSuite0 = ssl->options.cipherSuite0;
        session->cipherSuite  = ssl->options.cipherSuite;
    }
#endif
#if defined(WOLFSSL_TLS13)
    if (error == 0) {
        session->namedGroup     = ssl->session.namedGroup;
    }
#endif
#if defined(WOLFSSL_TLS13) && defined(HAVE_SESSION_TICKET)
    if (error == 0) {
        session->ticketSeen     = ssl->session.ticketSeen;
        session->ticketAdd      = ssl->session.ticketAdd;
        XMEMCPY(&session->ticketNonce, &ssl->session.ticketNonce,
                                                           sizeof(TicketNonce));
    #ifdef WOLFSSL_EARLY_DATA
        session->maxEarlyDataSz = ssl->session.maxEarlyDataSz;
    #endif
    }
#endif /* WOLFSSL_TLS13 && HAVE_SESSION_TICKET */
#ifdef HAVE_EXT_CACHE
    if (!ssl->options.internalCacheOff)
#endif
    {
        if (error == 0) {
            SessionCache[row].totalCount++;
            if (SessionCache[row].nextIdx == SESSIONS_PER_ROW)
                SessionCache[row].nextIdx = 0;
        }
    }
#ifndef NO_CLIENT_CACHE
    if (error == 0) {
        if (ssl->options.side == WOLFSSL_CLIENT_END && ssl->session.idLen) {
            word32 clientRow, clientIdx;

            WOLFSSL_MSG("Adding client cache entry");

            session->idLen = ssl->session.idLen;
            XMEMCPY(session->serverID, ssl->session.serverID,
                    ssl->session.idLen);

#ifdef HAVE_EXT_CACHE
            if (!ssl->options.internalCacheOff)
#endif
            {
                clientRow = HashSession(ssl->session.serverID,
                        ssl->session.idLen, &error) % SESSION_ROWS;
                if (error != 0) {
                    WOLFSSL_MSG("Hash session failed");
                } else {
                    clientIdx = ClientCache[clientRow].nextIdx++;

                    ClientCache[clientRow].Clients[clientIdx].serverRow =
                                                                   (word16)row;
                    ClientCache[clientRow].Clients[clientIdx].serverIdx =
                                                                   (word16)idx;

                    ClientCache[clientRow].totalCount++;
                    if (ClientCache[clientRow].nextIdx == SESSIONS_PER_ROW)
                        ClientCache[clientRow].nextIdx = 0;
                }
            }
        }
        else
            session->idLen = 0;
    }
#endif /* NO_CLIENT_CACHE */

#if defined(WOLFSSL_SESSION_STATS) && defined(WOLFSSL_PEAK_SESSIONS)
#ifdef HAVE_EXT_CACHE
    if (!ssl->options.internalCacheOff)
#endif
    {
        if (error == 0) {
            word32 active = 0;

            error = get_locked_session_stats(&active, NULL, NULL);
            if (error == WOLFSSL_SUCCESS) {
                error = 0;  /* back to this function ok */

                if (active > PeakSessions)
                    PeakSessions = active;
            }
        }
    }
#endif /* defined(WOLFSSL_SESSION_STATS) && defined(WOLFSSL_PEAK_SESSIONS) */

#ifdef HAVE_EXT_CACHE
    if (!ssl->options.internalCacheOff)
#endif
    {
        if (wc_UnLockMutex(&session_mutex) != 0)
            return BAD_MUTEX_E;
    }

#ifdef HAVE_EXT_CACHE
    if (error == 0 && ssl->ctx->new_sess_cb != NULL)
        cbRet = ssl->ctx->new_sess_cb(ssl, session);
    if (ssl->options.internalCacheOff && cbRet == 0)
        FreeSession(session, 1);
#endif

    return error;
}


#ifdef SESSION_INDEX

int wolfSSL_GetSessionIndex(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_GetSessionIndex");
    WOLFSSL_LEAVE("wolfSSL_GetSessionIndex", ssl->sessionIndex);
    return ssl->sessionIndex;
}


int wolfSSL_GetSessionAtIndex(int idx, WOLFSSL_SESSION* session)
{
    int row, col, result = WOLFSSL_FAILURE;

    WOLFSSL_ENTER("wolfSSL_GetSessionAtIndex");

    row = idx >> SESSIDX_ROW_SHIFT;
    col = idx & SESSIDX_IDX_MASK;

    if (wc_LockMutex(&session_mutex) != 0) {
        return BAD_MUTEX_E;
    }

    if (row < SESSION_ROWS &&
        col < (int)min(SessionCache[row].totalCount, SESSIONS_PER_ROW)) {
        XMEMCPY(session,
                 &SessionCache[row].Sessions[col], sizeof(WOLFSSL_SESSION));
        result = WOLFSSL_SUCCESS;
    }

    if (wc_UnLockMutex(&session_mutex) != 0)
        result = BAD_MUTEX_E;

    WOLFSSL_LEAVE("wolfSSL_GetSessionAtIndex", result);
    return result;
}

#endif /* SESSION_INDEX */

#if defined(SESSION_CERTS)

WOLFSSL_X509_CHAIN* wolfSSL_SESSION_get_peer_chain(WOLFSSL_SESSION* session)
{
    WOLFSSL_X509_CHAIN* chain = NULL;

    WOLFSSL_ENTER("wolfSSL_SESSION_get_peer_chain");
    if (session)
        chain = &session->chain;

    WOLFSSL_LEAVE("wolfSSL_SESSION_get_peer_chain", chain ? 1 : 0);
    return chain;
}


#ifdef OPENSSL_EXTRA
/* gets the peer certificate associated with the session passed in
 * returns null on failure, the caller should not free the returned pointer */
WOLFSSL_X509* wolfSSL_SESSION_get0_peer(WOLFSSL_SESSION* session)
{
    WOLFSSL_ENTER("wolfSSL_SESSION_get_peer_chain");
    if (session) {
        int count;

        count = wolfSSL_get_chain_count(&session->chain);
        if (count < 1 || count >= MAX_CHAIN_DEPTH) {
            WOLFSSL_MSG("bad count found");
            return NULL;
        }

        if (session->peer == NULL) {
            session->peer = wolfSSL_get_chain_X509(&session->chain, 0);
        }
        return session->peer;
    }
    WOLFSSL_MSG("No session passed in");

    return NULL;
}
#endif /* OPENSSL_EXTRA */
#endif /* SESSION_INDEX && SESSION_CERTS */


#ifdef WOLFSSL_SESSION_STATS

/* requires session_mutex lock held, WOLFSSL_SUCCESS on ok */
static int get_locked_session_stats(word32* active, word32* total, word32* peak)
{
    int result = WOLFSSL_SUCCESS;
    int i;
    int count;
    int idx;
    word32 now   = 0;
    word32 seen  = 0;
    word32 ticks = LowResTimer();

    (void)peak;

    WOLFSSL_ENTER("get_locked_session_stats");

    for (i = 0; i < SESSION_ROWS; i++) {
        seen += SessionCache[i].totalCount;

        if (active == NULL)
            continue;  /* no need to calculate what we can't set */

        count = min((word32)SessionCache[i].totalCount, SESSIONS_PER_ROW);
        idx   = SessionCache[i].nextIdx - 1;
        if (idx < 0)
            idx = SESSIONS_PER_ROW - 1; /* if back to front previous was end */

        for (; count > 0; --count, idx = idx ? idx - 1 : SESSIONS_PER_ROW - 1) {
            if (idx >= SESSIONS_PER_ROW || idx < 0) {  /* sanity check */
                WOLFSSL_MSG("Bad idx");
                break;
            }

            /* if not expired then good */
            if (ticks < (SessionCache[i].Sessions[idx].bornOn +
                         SessionCache[i].Sessions[idx].timeout) ) {
                now++;
            }
        }
    }

    if (active)
        *active = now;

    if (total)
        *total = seen;

#ifdef WOLFSSL_PEAK_SESSIONS
    if (peak)
        *peak = PeakSessions;
#endif

    WOLFSSL_LEAVE("get_locked_session_stats", result);

    return result;
}


/* return WOLFSSL_SUCCESS on ok */
int wolfSSL_get_session_stats(word32* active, word32* total, word32* peak,
                              word32* maxSessions)
{
    int result = WOLFSSL_SUCCESS;

    WOLFSSL_ENTER("wolfSSL_get_session_stats");

    if (maxSessions) {
        *maxSessions = SESSIONS_PER_ROW * SESSION_ROWS;

        if (active == NULL && total == NULL && peak == NULL)
            return result;  /* we're done */
    }

    /* user must provide at least one query value */
    if (active == NULL && total == NULL && peak == NULL)
        return BAD_FUNC_ARG;

    if (wc_LockMutex(&session_mutex) != 0) {
        return BAD_MUTEX_E;
    }

    result = get_locked_session_stats(active, total, peak);

    if (wc_UnLockMutex(&session_mutex) != 0)
        result = BAD_MUTEX_E;

    WOLFSSL_LEAVE("wolfSSL_get_session_stats", result);

    return result;
}

#endif /* WOLFSSL_SESSION_STATS */


    #ifdef PRINT_SESSION_STATS

    /* WOLFSSL_SUCCESS on ok */
    int wolfSSL_PrintSessionStats(void)
    {
        word32 totalSessionsSeen = 0;
        word32 totalSessionsNow = 0;
        word32 peak = 0;
        word32 maxSessions = 0;
        int    i;
        int    ret;
        double E;               /* expected freq */
        double chiSquare = 0;

        ret = wolfSSL_get_session_stats(&totalSessionsNow, &totalSessionsSeen,
                                        &peak, &maxSessions);
        if (ret != WOLFSSL_SUCCESS)
            return ret;
        printf("Total Sessions Seen = %d\n", totalSessionsSeen);
        printf("Total Sessions Now  = %d\n", totalSessionsNow);
#ifdef WOLFSSL_PEAK_SESSIONS
        printf("Peak  Sessions      = %d\n", peak);
#endif
        printf("Max   Sessions      = %d\n", maxSessions);

        E = (double)totalSessionsSeen / SESSION_ROWS;

        for (i = 0; i < SESSION_ROWS; i++) {
            double diff = SessionCache[i].totalCount - E;
            diff *= diff;                /* square    */
            diff /= E;                   /* normalize */

            chiSquare += diff;
        }
        printf("  chi-square = %5.1f, d.f. = %d\n", chiSquare,
                                                     SESSION_ROWS - 1);
        #if (SESSION_ROWS == 11)
            printf(" .05 p value =  18.3, chi-square should be less\n");
        #elif (SESSION_ROWS == 211)
            printf(".05 p value  = 244.8, chi-square should be less\n");
        #elif (SESSION_ROWS == 5981)
            printf(".05 p value  = 6161.0, chi-square should be less\n");
        #elif (SESSION_ROWS == 3)
            printf(".05 p value  =   6.0, chi-square should be less\n");
        #elif (SESSION_ROWS == 2861)
            printf(".05 p value  = 2985.5, chi-square should be less\n");
        #endif
        printf("\n");

        return ret;
    }

    #endif /* SESSION_STATS */

#else  /* NO_SESSION_CACHE */

/* No session cache version */
WOLFSSL_SESSION* GetSession(WOLFSSL* ssl, byte* masterSecret,
        byte restoreSessionCerts)
{
    (void)ssl;
    (void)masterSecret;
    (void)restoreSessionCerts;

    return NULL;
}

#endif /* NO_SESSION_CACHE */


/* call before SSL_connect, if verifying will add name check to
   date check and signature check */
WOLFSSL_ABI
int wolfSSL_check_domain_name(WOLFSSL* ssl, const char* dn)
{
    WOLFSSL_ENTER("wolfSSL_check_domain_name");

    if (ssl == NULL || dn == NULL) {
        WOLFSSL_MSG("Bad function argument: NULL");
        return WOLFSSL_FAILURE;
    }

    if (ssl->buffers.domainName.buffer)
        XFREE(ssl->buffers.domainName.buffer, ssl->heap, DYNAMIC_TYPE_DOMAIN);

    ssl->buffers.domainName.length = (word32)XSTRLEN(dn);
    ssl->buffers.domainName.buffer = (byte*)XMALLOC(
            ssl->buffers.domainName.length + 1, ssl->heap, DYNAMIC_TYPE_DOMAIN);

    if (ssl->buffers.domainName.buffer) {
        unsigned char* domainName = ssl->buffers.domainName.buffer;
        XMEMCPY(domainName, dn, ssl->buffers.domainName.length);
        domainName[ssl->buffers.domainName.length] = '\0';
        return WOLFSSL_SUCCESS;
    }
    else {
        ssl->error = MEMORY_ERROR;
        return WOLFSSL_FAILURE;
    }
}


/* turn on wolfSSL zlib compression
   returns WOLFSSL_SUCCESS for success, else error (not built in)
*/
int wolfSSL_set_compression(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_set_compression");
    (void)ssl;
#ifdef HAVE_LIBZ
    ssl->options.usingCompression = 1;
    return WOLFSSL_SUCCESS;
#else
    return NOT_COMPILED_IN;
#endif
}


#ifndef USE_WINDOWS_API
    #ifndef NO_WRITEV

        /* simulate writev semantics, doesn't actually do block at a time though
           because of SSL_write behavior and because front adds may be small */
        int wolfSSL_writev(WOLFSSL* ssl, const struct iovec* iov, int iovcnt)
        {
        #ifdef WOLFSSL_SMALL_STACK
            byte   staticBuffer[1]; /* force heap usage */
        #else
            byte   staticBuffer[FILE_BUFFER_SIZE];
        #endif
            byte* myBuffer  = staticBuffer;
            int   dynamic   = 0;
            int   sending   = 0;
            int   idx       = 0;
            int   i;
            int   ret;

            WOLFSSL_ENTER("wolfSSL_writev");

            for (i = 0; i < iovcnt; i++)
                sending += (int)iov[i].iov_len;

            if (sending > (int)sizeof(staticBuffer)) {
                myBuffer = (byte*)XMALLOC(sending, ssl->heap,
                                                           DYNAMIC_TYPE_WRITEV);
                if (!myBuffer)
                    return MEMORY_ERROR;

                dynamic = 1;
            }

            for (i = 0; i < iovcnt; i++) {
                XMEMCPY(&myBuffer[idx], iov[i].iov_base, iov[i].iov_len);
                idx += (int)iov[i].iov_len;
            }

           /* myBuffer may not initialized fully, but the sending length will be */
            PRAGMA_GCC_IGNORE("GCC diagnostic ignored \"-Wmaybe-uninitialized\"");
            ret = wolfSSL_write(ssl, myBuffer, sending);
            PRAGMA_GCC_POP;

            if (dynamic)
                XFREE(myBuffer, ssl->heap, DYNAMIC_TYPE_WRITEV);

            return ret;
        }
    #endif
#endif


#ifdef WOLFSSL_CALLBACKS

    typedef struct itimerval Itimerval;

    /* don't keep calling simple functions while setting up timer and signals
       if no inlining these are the next best */

    #define AddTimes(a, b, c)                       \
        do {                                        \
            c.tv_sec  = a.tv_sec  + b.tv_sec;       \
            c.tv_usec = a.tv_usec + b.tv_usec;      \
            if (c.tv_usec >=  1000000) {            \
                c.tv_sec++;                         \
                c.tv_usec -= 1000000;               \
            }                                       \
        } while (0)


    #define SubtractTimes(a, b, c)                  \
        do {                                        \
            c.tv_sec  = a.tv_sec  - b.tv_sec;       \
            c.tv_usec = a.tv_usec - b.tv_usec;      \
            if (c.tv_usec < 0) {                    \
                c.tv_sec--;                         \
                c.tv_usec += 1000000;               \
            }                                       \
        } while (0)

    #define CmpTimes(a, b, cmp)                     \
        ((a.tv_sec  ==  b.tv_sec) ?                 \
            (a.tv_usec cmp b.tv_usec) :             \
            (a.tv_sec  cmp b.tv_sec))               \


    /* do nothing handler */
    static void myHandler(int signo)
    {
        (void)signo;
        return;
    }


    static int wolfSSL_ex_wrapper(WOLFSSL* ssl, HandShakeCallBack hsCb,
                                 TimeoutCallBack toCb, WOLFSSL_TIMEVAL timeout)
    {
        int       ret        = WOLFSSL_FATAL_ERROR;
        int       oldTimerOn = 0;   /* was timer already on */
        WOLFSSL_TIMEVAL startTime;
        WOLFSSL_TIMEVAL endTime;
        WOLFSSL_TIMEVAL totalTime;
        Itimerval myTimeout;
        Itimerval oldTimeout; /* if old timer adjust from total time to reset */
        struct sigaction act, oact;

        #define ERR_OUT(x) { ssl->hsInfoOn = 0; ssl->toInfoOn = 0; return x; }

        if (hsCb) {
            ssl->hsInfoOn = 1;
            InitHandShakeInfo(&ssl->handShakeInfo, ssl);
        }
        if (toCb) {
            ssl->toInfoOn = 1;
            InitTimeoutInfo(&ssl->timeoutInfo);

            if (gettimeofday(&startTime, 0) < 0)
                ERR_OUT(GETTIME_ERROR);

            /* use setitimer to simulate getitimer, init 0 myTimeout */
            myTimeout.it_interval.tv_sec  = 0;
            myTimeout.it_interval.tv_usec = 0;
            myTimeout.it_value.tv_sec     = 0;
            myTimeout.it_value.tv_usec    = 0;
            if (setitimer(ITIMER_REAL, &myTimeout, &oldTimeout) < 0)
                ERR_OUT(SETITIMER_ERROR);

            if (oldTimeout.it_value.tv_sec || oldTimeout.it_value.tv_usec) {
                oldTimerOn = 1;

                /* is old timer going to expire before ours */
                if (CmpTimes(oldTimeout.it_value, timeout, <)) {
                    timeout.tv_sec  = oldTimeout.it_value.tv_sec;
                    timeout.tv_usec = oldTimeout.it_value.tv_usec;
                }
            }
            myTimeout.it_value.tv_sec  = timeout.tv_sec;
            myTimeout.it_value.tv_usec = timeout.tv_usec;

            /* set up signal handler, don't restart socket send/recv */
            act.sa_handler = myHandler;
            sigemptyset(&act.sa_mask);
            act.sa_flags = 0;
#ifdef SA_INTERRUPT
            act.sa_flags |= SA_INTERRUPT;
#endif
            if (sigaction(SIGALRM, &act, &oact) < 0)
                ERR_OUT(SIGACT_ERROR);

            if (setitimer(ITIMER_REAL, &myTimeout, 0) < 0)
                ERR_OUT(SETITIMER_ERROR);
        }

        /* do main work */
#ifndef NO_WOLFSSL_CLIENT
        if (ssl->options.side == WOLFSSL_CLIENT_END)
            ret = wolfSSL_connect(ssl);
#endif
#ifndef NO_WOLFSSL_SERVER
        if (ssl->options.side == WOLFSSL_SERVER_END)
            ret = wolfSSL_accept(ssl);
#endif

        /* do callbacks */
        if (toCb) {
            if (oldTimerOn) {
                gettimeofday(&endTime, 0);
                SubtractTimes(endTime, startTime, totalTime);
                /* adjust old timer for elapsed time */
                if (CmpTimes(totalTime, oldTimeout.it_value, <))
                    SubtractTimes(oldTimeout.it_value, totalTime,
                                  oldTimeout.it_value);
                else {
                    /* reset value to interval, may be off */
                    oldTimeout.it_value.tv_sec = oldTimeout.it_interval.tv_sec;
                    oldTimeout.it_value.tv_usec =oldTimeout.it_interval.tv_usec;
                }
                /* keep iter the same whether there or not */
            }
            /* restore old handler */
            if (sigaction(SIGALRM, &oact, 0) < 0)
                ret = SIGACT_ERROR;    /* more pressing error, stomp */
            else
                /* use old settings which may turn off (expired or not there) */
                if (setitimer(ITIMER_REAL, &oldTimeout, 0) < 0)
                    ret = SETITIMER_ERROR;

            /* if we had a timeout call callback */
            if (ssl->timeoutInfo.timeoutName[0]) {
                ssl->timeoutInfo.timeoutValue.tv_sec  = timeout.tv_sec;
                ssl->timeoutInfo.timeoutValue.tv_usec = timeout.tv_usec;
                (toCb)(&ssl->timeoutInfo);
            }
            /* clean up */
            FreeTimeoutInfo(&ssl->timeoutInfo, ssl->heap);
            ssl->toInfoOn = 0;
        }
        if (hsCb) {
            FinishHandShakeInfo(&ssl->handShakeInfo);
            (hsCb)(&ssl->handShakeInfo);
            ssl->hsInfoOn = 0;
        }
        return ret;
    }


#ifndef NO_WOLFSSL_CLIENT

    int wolfSSL_connect_ex(WOLFSSL* ssl, HandShakeCallBack hsCb,
                          TimeoutCallBack toCb, WOLFSSL_TIMEVAL timeout)
    {
        WOLFSSL_ENTER("wolfSSL_connect_ex");
        return wolfSSL_ex_wrapper(ssl, hsCb, toCb, timeout);
    }

#endif


#ifndef NO_WOLFSSL_SERVER

    int wolfSSL_accept_ex(WOLFSSL* ssl, HandShakeCallBack hsCb,
                         TimeoutCallBack toCb, WOLFSSL_TIMEVAL timeout)
    {
        WOLFSSL_ENTER("wolfSSL_accept_ex");
        return wolfSSL_ex_wrapper(ssl, hsCb, toCb, timeout);
    }

#endif

#endif /* WOLFSSL_CALLBACKS */


#ifndef NO_PSK

    void wolfSSL_CTX_set_psk_client_callback(WOLFSSL_CTX* ctx,
                                         wc_psk_client_callback cb)
    {
        WOLFSSL_ENTER("SSL_CTX_set_psk_client_callback");

        if (ctx == NULL)
            return;

        ctx->havePSK = 1;
        ctx->client_psk_cb = cb;
    }

    void wolfSSL_set_psk_client_callback(WOLFSSL* ssl,wc_psk_client_callback cb)
    {
        byte haveRSA = 1;
        int  keySz   = 0;

        WOLFSSL_ENTER("SSL_set_psk_client_callback");

        if (ssl == NULL)
            return;

        ssl->options.havePSK = 1;
        ssl->options.client_psk_cb = cb;

        #ifdef NO_RSA
            haveRSA = 0;
        #endif
        #ifndef NO_CERTS
            keySz = ssl->buffers.keySz;
        #endif
        InitSuites(ssl->suites, ssl->version, keySz, haveRSA, TRUE,
                   ssl->options.haveDH, ssl->options.haveNTRU,
                   ssl->options.haveECDSAsig, ssl->options.haveECC,
                   ssl->options.haveStaticECC, ssl->options.haveAnon,
                   ssl->options.side);
    }
    #ifdef OPENSSL_EXTRA
    /**
     * set call back function for psk session use
     * @param ssl  a pointer to WOLFSSL structure
     * @param cb   a function pointer to wc_psk_use_session_cb
     * @return none
     */
    void wolfSSL_set_psk_use_session_callback(WOLFSSL* ssl, 
                                                wc_psk_use_session_cb_func cb)
    {
        WOLFSSL_ENTER("wolfSSL_set_psk_use_session_callback");
        
        ssl->options.havePSK = 1;
        ssl->options.session_psk_cb = cb;
        
        WOLFSSL_LEAVE("wolfSSL_set_psk_use_session_callback", WOLFSSL_SUCCESS);
    }
    #endif
    
    void wolfSSL_CTX_set_psk_server_callback(WOLFSSL_CTX* ctx,
                                         wc_psk_server_callback cb)
    {
        WOLFSSL_ENTER("SSL_CTX_set_psk_server_callback");
        if (ctx == NULL)
            return;
        ctx->havePSK = 1;
        ctx->server_psk_cb = cb;
    }

    void wolfSSL_set_psk_server_callback(WOLFSSL* ssl,wc_psk_server_callback cb)
    {
        byte haveRSA = 1;
        int  keySz   = 0;

        WOLFSSL_ENTER("SSL_set_psk_server_callback");
        if (ssl == NULL)
            return;

        ssl->options.havePSK = 1;
        ssl->options.server_psk_cb = cb;

        #ifdef NO_RSA
            haveRSA = 0;
        #endif
        #ifndef NO_CERTS
            keySz = ssl->buffers.keySz;
        #endif
        InitSuites(ssl->suites, ssl->version, keySz, haveRSA, TRUE,
                   ssl->options.haveDH, ssl->options.haveNTRU,
                   ssl->options.haveECDSAsig, ssl->options.haveECC,
                   ssl->options.haveStaticECC, ssl->options.haveAnon,
                   ssl->options.side);
    }

    const char* wolfSSL_get_psk_identity_hint(const WOLFSSL* ssl)
    {
        WOLFSSL_ENTER("SSL_get_psk_identity_hint");

        if (ssl == NULL || ssl->arrays == NULL)
            return NULL;

        return ssl->arrays->server_hint;
    }


    const char* wolfSSL_get_psk_identity(const WOLFSSL* ssl)
    {
        WOLFSSL_ENTER("SSL_get_psk_identity");

        if (ssl == NULL || ssl->arrays == NULL)
            return NULL;

        return ssl->arrays->client_identity;
    }

    int wolfSSL_CTX_use_psk_identity_hint(WOLFSSL_CTX* ctx, const char* hint)
    {
        WOLFSSL_ENTER("SSL_CTX_use_psk_identity_hint");
        if (hint == 0)
            ctx->server_hint[0] = '\0';
        else {
            /* Qt does not call CTX_set_*_psk_callbacks where havePSK is set */
            #ifdef WOLFSSL_QT
            ctx->havePSK=1;
            #endif
            XSTRNCPY(ctx->server_hint, hint, MAX_PSK_ID_LEN);
            ctx->server_hint[MAX_PSK_ID_LEN] = '\0'; /* null term */
        }
        return WOLFSSL_SUCCESS;
    }

    int wolfSSL_use_psk_identity_hint(WOLFSSL* ssl, const char* hint)
    {
        WOLFSSL_ENTER("SSL_use_psk_identity_hint");

        if (ssl == NULL || ssl->arrays == NULL)
            return WOLFSSL_FAILURE;

        if (hint == 0)
            ssl->arrays->server_hint[0] = 0;
        else {
            XSTRNCPY(ssl->arrays->server_hint, hint,
                                            sizeof(ssl->arrays->server_hint)-1);
            ssl->arrays->server_hint[sizeof(ssl->arrays->server_hint)-1] = '\0';
        }
        return WOLFSSL_SUCCESS;
    }

    void* wolfSSL_get_psk_callback_ctx(WOLFSSL* ssl)
    {
        return ssl ? ssl->options.psk_ctx : NULL;
    }
    void* wolfSSL_CTX_get_psk_callback_ctx(WOLFSSL_CTX* ctx)
    {
        return ctx ? ctx->psk_ctx : NULL;
    }
    int wolfSSL_set_psk_callback_ctx(WOLFSSL* ssl, void* psk_ctx)
    {
        if (ssl == NULL)
            return WOLFSSL_FAILURE;
        ssl->options.psk_ctx = psk_ctx;
        return WOLFSSL_SUCCESS;
    }
    int wolfSSL_CTX_set_psk_callback_ctx(WOLFSSL_CTX* ctx, void* psk_ctx)
    {
        if (ctx == NULL)
            return WOLFSSL_FAILURE;
        ctx->psk_ctx = psk_ctx;
        return WOLFSSL_SUCCESS;
    }
#endif /* NO_PSK */


#ifdef HAVE_ANON

    int wolfSSL_CTX_allow_anon_cipher(WOLFSSL_CTX* ctx)
    {
        WOLFSSL_ENTER("wolfSSL_CTX_allow_anon_cipher");

        if (ctx == NULL)
            return WOLFSSL_FAILURE;

        ctx->haveAnon = 1;

        return WOLFSSL_SUCCESS;
    }

#endif /* HAVE_ANON */


#ifndef NO_CERTS
/* used to be defined on NO_FILESYSTEM only, but are generally useful */

    int wolfSSL_CTX_load_verify_buffer_ex(WOLFSSL_CTX* ctx,
                                         const unsigned char* in,
                                         long sz, int format, int userChain,
                                         word32 flags)
    {
        int verify;
        int ret = WOLFSSL_FAILURE;

        WOLFSSL_ENTER("wolfSSL_CTX_load_verify_buffer_ex");

        verify = GET_VERIFY_SETTING_CTX(ctx);
        if (flags & WOLFSSL_LOAD_FLAG_DATE_ERR_OKAY)
            verify = VERIFY_SKIP_DATE;

        if (format == WOLFSSL_FILETYPE_PEM)
            ret = ProcessChainBuffer(ctx, in, sz, format, CA_TYPE, NULL,
                                      verify);
        else
            ret = ProcessBuffer(ctx, in, sz, format, CA_TYPE, NULL, NULL,
                                 userChain, verify);
        WOLFSSL_LEAVE("wolfSSL_CTX_load_verify_buffer_ex", ret);
        return ret;
    }

    /* wolfSSL extension allows DER files to be loaded from buffers as well */
    int wolfSSL_CTX_load_verify_buffer(WOLFSSL_CTX* ctx,
                                       const unsigned char* in,
                                       long sz, int format)
    {
        return wolfSSL_CTX_load_verify_buffer_ex(ctx, in, sz, format, 0,
            WOLFSSL_LOAD_VERIFY_DEFAULT_FLAGS);
    }

    int wolfSSL_CTX_load_verify_chain_buffer_format(WOLFSSL_CTX* ctx,
                                       const unsigned char* in,
                                       long sz, int format)
    {
        return wolfSSL_CTX_load_verify_buffer_ex(ctx, in, sz, format, 1,
            WOLFSSL_LOAD_VERIFY_DEFAULT_FLAGS);
    }


#ifdef WOLFSSL_TRUST_PEER_CERT
    int wolfSSL_CTX_trust_peer_buffer(WOLFSSL_CTX* ctx,
                                       const unsigned char* in,
                                       long sz, int format)
    {
        WOLFSSL_ENTER("wolfSSL_CTX_trust_peer_buffer");

        /* sanity check on arguments */
        if (sz < 0 || in == NULL || ctx == NULL) {
            return BAD_FUNC_ARG;
        }

        if (format == WOLFSSL_FILETYPE_PEM)
            return ProcessChainBuffer(ctx, in, sz, format, TRUSTED_PEER_TYPE,
                                      NULL, GET_VERIFY_SETTING_CTX(ctx));
        else
            return ProcessBuffer(ctx, in, sz, format, TRUSTED_PEER_TYPE, NULL,
                                 NULL, 0, GET_VERIFY_SETTING_CTX(ctx));
    }
#endif /* WOLFSSL_TRUST_PEER_CERT */


    int wolfSSL_CTX_use_certificate_buffer(WOLFSSL_CTX* ctx,
                                 const unsigned char* in, long sz, int format)
    {
        int ret = WOLFSSL_FAILURE;

        WOLFSSL_ENTER("wolfSSL_CTX_use_certificate_buffer");
        ret = ProcessBuffer(ctx, in, sz, format, CERT_TYPE, NULL, NULL, 0,
                             GET_VERIFY_SETTING_CTX(ctx));
        WOLFSSL_LEAVE("wolfSSL_CTX_use_certificate_buffer", ret);
        return ret;
    }


    int wolfSSL_CTX_use_PrivateKey_buffer(WOLFSSL_CTX* ctx,
                                 const unsigned char* in, long sz, int format)
    {
        int ret = WOLFSSL_FAILURE;

        WOLFSSL_ENTER("wolfSSL_CTX_use_PrivateKey_buffer");
        ret = ProcessBuffer(ctx, in, sz, format, PRIVATEKEY_TYPE, NULL, NULL,
                             0, GET_VERIFY_SETTING_CTX(ctx));
        WOLFSSL_LEAVE("wolfSSL_CTX_use_PrivateKey_buffer", ret);
        return ret;
    }

#ifdef HAVE_PKCS11
    int wolfSSL_CTX_use_PrivateKey_id(WOLFSSL_CTX* ctx, const unsigned char* id,
                                      long sz, int devId, long keySz)
    {
        int ret = wolfSSL_CTX_use_PrivateKey_Id(ctx, id, sz, devId);

        if (ret == WOLFSSL_SUCCESS)
            ctx->privateKeySz = (word32)keySz;

        return ret;
    }

    int wolfSSL_CTX_use_PrivateKey_Id(WOLFSSL_CTX* ctx, const unsigned char* id,
                                      long sz, int devId)
    {
        int ret = WOLFSSL_FAILURE;

        FreeDer(&ctx->privateKey);
        if (AllocDer(&ctx->privateKey, (word32)sz, PRIVATEKEY_TYPE,
                                                              ctx->heap) == 0) {
            XMEMCPY(ctx->privateKey->buffer, id, sz);
            ctx->privateKeyId = 1;
            if (devId != INVALID_DEVID)
                ctx->privateKeyDevId = devId;
            else
                ctx->privateKeyDevId = ctx->devId;

            ret = WOLFSSL_SUCCESS;
        }

        return ret;
    }

    int wolfSSL_CTX_use_PrivateKey_Label(WOLFSSL_CTX* ctx, const char* label,
                                         int devId)
    {
        int ret = WOLFSSL_FAILURE;
        word32 sz = (word32)XSTRLEN(label) + 1;

        FreeDer(&ctx->privateKey);
        if (AllocDer(&ctx->privateKey, (word32)sz, PRIVATEKEY_TYPE,
                                                              ctx->heap) == 0) {
            XMEMCPY(ctx->privateKey->buffer, label, sz);
            ctx->privateKeyLabel = 1;
            if (devId != INVALID_DEVID)
                ctx->privateKeyDevId = devId;
            else
                ctx->privateKeyDevId = ctx->devId;

            ret = WOLFSSL_SUCCESS;
        }

        return ret;
    }
#endif

    int wolfSSL_CTX_use_certificate_chain_buffer_format(WOLFSSL_CTX* ctx,
                                 const unsigned char* in, long sz, int format)
    {
        WOLFSSL_ENTER("wolfSSL_CTX_use_certificate_chain_buffer_format");
        return ProcessBuffer(ctx, in, sz, format, CERT_TYPE, NULL, NULL, 1,
                             GET_VERIFY_SETTING_CTX(ctx));
    }

    int wolfSSL_CTX_use_certificate_chain_buffer(WOLFSSL_CTX* ctx,
                                 const unsigned char* in, long sz)
    {
        return wolfSSL_CTX_use_certificate_chain_buffer_format(ctx, in, sz,
                                                            WOLFSSL_FILETYPE_PEM);
    }


#ifndef NO_DH

    /* server wrapper for ctx or ssl Diffie-Hellman parameters */
    static int wolfSSL_SetTmpDH_buffer_wrapper(WOLFSSL_CTX* ctx, WOLFSSL* ssl,
                                               const unsigned char* buf,
                                               long sz, int format)
    {
        DerBuffer* der = NULL;
        int    ret      = 0;
        word32 pSz = MAX_DH_SIZE;
        word32 gSz = MAX_DH_SIZE;
    #ifdef WOLFSSL_SMALL_STACK
        byte*  p = NULL;
        byte*  g = NULL;
    #else
        byte   p[MAX_DH_SIZE];
        byte   g[MAX_DH_SIZE];
    #endif

        if (ctx == NULL || buf == NULL)
            return BAD_FUNC_ARG;

        ret = AllocDer(&der, 0, DH_PARAM_TYPE, ctx->heap);
        if (ret != 0) {
            return ret;
        }
        der->buffer = (byte*)buf;
        der->length = (word32)sz;

    #ifdef WOLFSSL_SMALL_STACK
        p = (byte*)XMALLOC(pSz, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
        g = (byte*)XMALLOC(gSz, NULL, DYNAMIC_TYPE_PUBLIC_KEY);

        if (p == NULL || g == NULL) {
            XFREE(p, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
            XFREE(g, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
            return MEMORY_E;
        }
    #endif

        if (format != WOLFSSL_FILETYPE_ASN1 && format != WOLFSSL_FILETYPE_PEM)
            ret = WOLFSSL_BAD_FILETYPE;
        else {
            if (format == WOLFSSL_FILETYPE_PEM) {
#ifdef WOLFSSL_PEM_TO_DER
                FreeDer(&der);
                ret = PemToDer(buf, sz, DH_PARAM_TYPE, &der, ctx->heap,
                               NULL, NULL);
    #ifdef WOLFSSL_WPAS
        #ifndef NO_DSA
                if (ret < 0) {
                    ret = PemToDer(buf, sz, DSA_PARAM_TYPE, &der, ctx->heap,
                               NULL, NULL);
                }
        #endif
    #endif /* WOLFSSL_WPAS */
#else
                ret = NOT_COMPILED_IN;
#endif /* WOLFSSL_PEM_TO_DER */
            }

            if (ret == 0) {
                if (wc_DhParamsLoad(der->buffer, der->length, p, &pSz, g, &gSz) < 0)
                    ret = WOLFSSL_BAD_FILETYPE;
                else if (ssl)
                    ret = wolfSSL_SetTmpDH(ssl, p, pSz, g, gSz);
                else
                    ret = wolfSSL_CTX_SetTmpDH(ctx, p, pSz, g, gSz);
            }
        }

        FreeDer(&der);

    #ifdef WOLFSSL_SMALL_STACK
        XFREE(p, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
        XFREE(g, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
    #endif

        return ret;
    }


    /* server Diffie-Hellman parameters, WOLFSSL_SUCCESS on ok */
    int wolfSSL_SetTmpDH_buffer(WOLFSSL* ssl, const unsigned char* buf, long sz,
                               int format)
    {
        if (ssl == NULL)
            return BAD_FUNC_ARG;

        return wolfSSL_SetTmpDH_buffer_wrapper(ssl->ctx, ssl, buf, sz, format);
    }


    /* server ctx Diffie-Hellman parameters, WOLFSSL_SUCCESS on ok */
    int wolfSSL_CTX_SetTmpDH_buffer(WOLFSSL_CTX* ctx, const unsigned char* buf,
                                   long sz, int format)
    {
        return wolfSSL_SetTmpDH_buffer_wrapper(ctx, NULL, buf, sz, format);
    }

#endif /* NO_DH */


    int wolfSSL_use_certificate_buffer(WOLFSSL* ssl,
                                 const unsigned char* in, long sz, int format)
    {
        WOLFSSL_ENTER("wolfSSL_use_certificate_buffer");
        if (ssl == NULL)
            return BAD_FUNC_ARG;

        return ProcessBuffer(ssl->ctx, in, sz, format, CERT_TYPE, ssl, NULL, 0,
                             GET_VERIFY_SETTING_SSL(ssl));
    }


    int wolfSSL_use_PrivateKey_buffer(WOLFSSL* ssl,
                                 const unsigned char* in, long sz, int format)
    {
        WOLFSSL_ENTER("wolfSSL_use_PrivateKey_buffer");
        if (ssl == NULL)
            return BAD_FUNC_ARG;

        return ProcessBuffer(ssl->ctx, in, sz, format, PRIVATEKEY_TYPE,
                             ssl, NULL, 0, GET_VERIFY_SETTING_SSL(ssl));
    }

#ifdef WOLF_CRYPTO_CB
    int wolfSSL_use_PrivateKey_id(WOLFSSL* ssl, const unsigned char* id,
                                  long sz, int devId, long keySz)
    {
        int ret = wolfSSL_use_PrivateKey_Id(ssl, id, sz, devId);

        if (ret == WOLFSSL_SUCCESS)
            ssl->buffers.keySz = (word32)keySz;

        return ret;
    }

    int wolfSSL_use_PrivateKey_Id(WOLFSSL* ssl, const unsigned char* id,
                                  long sz, int devId)
    {
        int ret = WOLFSSL_FAILURE;

        if (ssl->buffers.weOwnKey)
            FreeDer(&ssl->buffers.key);
        if (AllocDer(&ssl->buffers.key, (word32)sz, PRIVATEKEY_TYPE,
                                                            ssl->heap) == 0) {
            XMEMCPY(ssl->buffers.key->buffer, id, sz);
            ssl->buffers.weOwnKey = 1;
            ssl->buffers.keyId = 1;
            if (devId != INVALID_DEVID)
                ssl->buffers.keyDevId = devId;
            else
                ssl->buffers.keyDevId = ssl->devId;

            ret = WOLFSSL_SUCCESS;
        }

        return ret;
    }

    int wolfSSL_use_PrivateKey_Label(WOLFSSL* ssl, const char* label, int devId)
    {
        int ret = WOLFSSL_FAILURE;
        word32 sz = (word32)XSTRLEN(label) + 1;

        if (ssl->buffers.weOwnKey)
            FreeDer(&ssl->buffers.key);
        if (AllocDer(&ssl->buffers.key, (word32)sz, PRIVATEKEY_TYPE,
                                                            ssl->heap) == 0) {
            XMEMCPY(ssl->buffers.key->buffer, label, sz);
            ssl->buffers.weOwnKey = 1;
            ssl->buffers.keyLabel = 1;
            if (devId != INVALID_DEVID)
                ssl->buffers.keyDevId = devId;
            else
                ssl->buffers.keyDevId = ssl->devId;

            ret = WOLFSSL_SUCCESS;
        }

        return ret;
    }
#endif

    int wolfSSL_use_certificate_chain_buffer_format(WOLFSSL* ssl,
                                 const unsigned char* in, long sz, int format)
    {
        WOLFSSL_ENTER("wolfSSL_use_certificate_chain_buffer_format");
        if (ssl == NULL)
            return BAD_FUNC_ARG;

        return ProcessBuffer(ssl->ctx, in, sz, format, CERT_TYPE,
                             ssl, NULL, 1, GET_VERIFY_SETTING_SSL(ssl));
    }

    int wolfSSL_use_certificate_chain_buffer(WOLFSSL* ssl,
                                 const unsigned char* in, long sz)
    {
        return wolfSSL_use_certificate_chain_buffer_format(ssl, in, sz,
                                                            WOLFSSL_FILETYPE_PEM);
    }


    /* unload any certs or keys that SSL owns, leave CTX as is
       WOLFSSL_SUCCESS on ok */
    int wolfSSL_UnloadCertsKeys(WOLFSSL* ssl)
    {
        if (ssl == NULL) {
            WOLFSSL_MSG("Null function arg");
            return BAD_FUNC_ARG;
        }

        if (ssl->buffers.weOwnCert && !ssl->keepCert) {
            WOLFSSL_MSG("Unloading cert");
            FreeDer(&ssl->buffers.certificate);
            #ifdef KEEP_OUR_CERT
            wolfSSL_X509_free(ssl->ourCert);
            ssl->ourCert = NULL;
            #endif
            ssl->buffers.weOwnCert = 0;
        }

        if (ssl->buffers.weOwnCertChain) {
            WOLFSSL_MSG("Unloading cert chain");
            FreeDer(&ssl->buffers.certChain);
            ssl->buffers.weOwnCertChain = 0;
        }

        if (ssl->buffers.weOwnKey) {
            WOLFSSL_MSG("Unloading key");
            FreeDer(&ssl->buffers.key);
            ssl->buffers.weOwnKey = 0;
        }

        return WOLFSSL_SUCCESS;
    }


    int wolfSSL_CTX_UnloadCAs(WOLFSSL_CTX* ctx)
    {
        WOLFSSL_ENTER("wolfSSL_CTX_UnloadCAs");

        if (ctx == NULL)
            return BAD_FUNC_ARG;

        return wolfSSL_CertManagerUnloadCAs(ctx->cm);
    }


#ifdef WOLFSSL_TRUST_PEER_CERT
    int wolfSSL_CTX_Unload_trust_peers(WOLFSSL_CTX* ctx)
    {
        WOLFSSL_ENTER("wolfSSL_CTX_Unload_trust_peers");

        if (ctx == NULL)
            return BAD_FUNC_ARG;

        return wolfSSL_CertManagerUnload_trust_peers(ctx->cm);
    }
#endif /* WOLFSSL_TRUST_PEER_CERT */
/* old NO_FILESYSTEM end */
#endif /* !NO_CERTS */


#ifdef OPENSSL_EXTRA

    int wolfSSL_add_all_algorithms(void)
    {
        WOLFSSL_ENTER("wolfSSL_add_all_algorithms");
        if (wolfSSL_Init() == WOLFSSL_SUCCESS)
            return WOLFSSL_SUCCESS;
        else
            return WOLFSSL_FATAL_ERROR;
    }

    int wolfSSL_OpenSSL_add_all_algorithms_noconf(void)
    {
        WOLFSSL_ENTER("wolfSSL_OpenSSL_add_all_algorithms_noconf");

        if  (wolfSSL_add_all_algorithms() == WOLFSSL_FATAL_ERROR)
            return WOLFSSL_FATAL_ERROR;

        return  WOLFSSL_SUCCESS;
    }

    int wolfSSL_OpenSSL_add_all_algorithms_conf(void)
    {
        WOLFSSL_ENTER("wolfSSL_OpenSSL_add_all_algorithms_conf");
        /* This function is currently the same as
        wolfSSL_OpenSSL_add_all_algorithms_noconf since we do not employ
        the use of a wolfssl.cnf type configuration file and is only used for
        OpenSSL compatability. */

        if (wolfSSL_add_all_algorithms() == WOLFSSL_FATAL_ERROR) {
            return WOLFSSL_FATAL_ERROR;
        }
        return WOLFSSL_SUCCESS;
    }

   /* returns previous set cache size which stays constant */
    long wolfSSL_CTX_sess_set_cache_size(WOLFSSL_CTX* ctx, long sz)
    {
        /* cache size fixed at compile time in wolfSSL */
        (void)ctx;
        (void)sz;
        WOLFSSL_MSG("session cache is set at compile time");
        #ifndef NO_SESSION_CACHE
            return (long)(SESSIONS_PER_ROW * SESSION_ROWS);
        #else
            return 0;
        #endif
    }

#endif

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
    void wolfSSL_CTX_set_quiet_shutdown(WOLFSSL_CTX* ctx, int mode)
    {
        WOLFSSL_ENTER("wolfSSL_CTX_set_quiet_shutdown");
        if (mode)
            ctx->quietShutdown = 1;
    }


    void wolfSSL_set_quiet_shutdown(WOLFSSL* ssl, int mode)
    {
        WOLFSSL_ENTER("wolfSSL_CTX_set_quiet_shutdown");
        if (mode)
            ssl->options.quietShutdown = 1;
    }
#endif /* OPENSSL_EXTRA || WOLFSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#ifdef OPENSSL_EXTRA
#ifndef NO_BIO
    void wolfSSL_set_bio(WOLFSSL* ssl, WOLFSSL_BIO* rd, WOLFSSL_BIO* wr)
    {
        WOLFSSL_ENTER("wolfSSL_set_bio");

        if (ssl == NULL) {
            WOLFSSL_MSG("Bad argument, ssl was NULL");
            return;
        }

        /* free any existing WOLFSSL_BIOs in use but don't free those in
         * a chain */
        if (ssl->biord != NULL) {
            if (ssl->biord != ssl->biowr) {
                if (ssl->biowr != NULL && ssl->biowr->prev != NULL)
                    wolfSSL_BIO_free(ssl->biowr);
                ssl->biowr = NULL;
            }
            if (ssl->biord->prev != NULL)
                wolfSSL_BIO_free(ssl->biord);
            ssl->biord = NULL;
        }

        ssl->biord = rd;
        ssl->biowr = wr;

        /* set SSL to use BIO callbacks instead */
        if (((ssl->cbioFlag & WOLFSSL_CBIO_RECV) == 0)) {
            ssl->CBIORecv = BioReceive;
        }
        if (((ssl->cbioFlag & WOLFSSL_CBIO_SEND) == 0)) {
            ssl->CBIOSend = BioSend;
        }

        /* User programs should always retry reading from these BIOs */
        if (rd) {
            /* User writes to rd */
            BIO_set_retry_write(rd);
        }
        if (wr) {
            /* User reads from wr */
            BIO_set_retry_read(wr);
        }
    }
#endif /* !NO_BIO */
#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_EXTRA) || defined(HAVE_WEBSERVER)
    void wolfSSL_CTX_set_client_CA_list(WOLFSSL_CTX* ctx,
                                       WOLF_STACK_OF(WOLFSSL_X509_NAME)* names)
    {
        WOLFSSL_ENTER("wolfSSL_CTX_set_client_CA_list");
    #if defined(OPENSSL_EXTRA) || defined(WOLFSSL_EXTRA)
        if (ctx != NULL)
            ctx->ca_names = names;
    #else
        (void)ctx;
        (void)names;
    #endif
    }


    /* returns the CA's set on server side or the CA's sent from server when
     * on client side */
#if defined(SESSION_CERTS) && defined(OPENSSL_ALL)
    WOLF_STACK_OF(WOLFSSL_X509_NAME)* wolfSSL_get_client_CA_list(
            const WOLFSSL* ssl)
    {
        WOLFSSL_ENTER("wolfSSL_get_client_CA_list");

        if (ssl == NULL) {
            WOLFSSL_MSG("Bad argument passed to wolfSSL_get_client_CA_list");
            return NULL;
        }

        /* return list of CAs sent from the server */
        if (ssl->options.side == WOLFSSL_CLIENT_END) {
            WOLF_STACK_OF(WOLFSSL_X509)* sk;

            sk = wolfSSL_get_peer_cert_chain(ssl);
            if (sk != NULL) {
                WOLF_STACK_OF(WOLFSSL_X509_NAME)* ret;
                WOLFSSL_X509* x509;

                ret = wolfSSL_sk_X509_NAME_new(NULL);
                do {
                    x509 = wolfSSL_sk_X509_pop(sk);
                    if (x509 != NULL) {
                        if (wolfSSL_X509_get_isCA(x509)) {
                            if (wolfSSL_sk_X509_NAME_push(ret,
                                    wolfSSL_X509_get_subject_name(x509)) != 0) {
                                WOLFSSL_MSG("Error pushing X509 name to stack");
                                /* continue on to try other certificates and
                                 * do not fail out here */
                            }
                        }
                        wolfSSL_X509_free(x509);
                    }
                } while (x509 != NULL);
                wolfSSL_sk_X509_free(sk);
                return ret;
            }
            return NULL;
        }
        else {
            /* currently only can be set in the CTX */
            return ssl->ctx->ca_names;
        }
    }
#endif /* SESSION_CERTS */


    #if defined(OPENSSL_ALL) || defined(OPENSSL_EXTRA) || \
        defined(WOLFSSL_NGINX) || defined (WOLFSSL_HAPROXY)
    /* registers client cert callback, called during handshake if server
       requests client auth but user has not loaded client cert/key */
    void wolfSSL_CTX_set_client_cert_cb(WOLFSSL_CTX *ctx, client_cert_cb cb)
    {
        WOLFSSL_ENTER("wolfSSL_CTX_set_client_cert_cb");

        if (ctx != NULL) {
            ctx->CBClientCert = cb;
        }
    }
    #endif /* OPENSSL_ALL || OPENSSL_EXTRA || WOLFSSL_NGINX || WOLFSSL_HAPROXY */

#endif /* OPENSSL_EXTRA || WOLFSSL_EXTRA || HAVE_WEBSERVER */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_EXTRA)
    WOLF_STACK_OF(WOLFSSL_X509_NAME)* wolfSSL_CTX_get_client_CA_list(
            const WOLFSSL_CTX *s)
    {
        WOLFSSL_ENTER("wolfSSL_CTX_get_client_CA_list");

        if (s == NULL)
            return NULL;

        return s->ca_names;
    }
#endif

#if defined(OPENSSL_EXTRA) || defined(HAVE_WEBSERVER)
#ifndef NO_BIO
    #if !defined(NO_RSA) && !defined(NO_CERTS)
    WOLF_STACK_OF(WOLFSSL_X509_NAME)* wolfSSL_load_client_CA_file(const char* fname)
    {
        /* The webserver build is using this to load a CA into the server
         * for client authentication as an option. Have this return NULL in
         * that case. If OPENSSL_EXTRA is enabled, go ahead and include
         * the function. */
    #ifdef OPENSSL_EXTRA
        WOLFSSL_STACK *list = NULL;
        WOLFSSL_STACK *node;
        WOLFSSL_BIO* bio;
        WOLFSSL_X509 *cert = NULL;
        WOLFSSL_X509_NAME *subjectName = NULL;
        unsigned long err;

        WOLFSSL_ENTER("wolfSSL_load_client_CA_file");

        bio = wolfSSL_BIO_new_file(fname, "rb");
        if (bio == NULL)
            return NULL;

        /* Read each certificate in the chain out of the file. */
        while (wolfSSL_PEM_read_bio_X509(bio, &cert, NULL, NULL) != NULL) {
            subjectName = wolfSSL_X509_get_subject_name(cert);
            if (subjectName == NULL)
                break;

            node = wolfSSL_sk_new_node(NULL);
            if (node == NULL)
                break;
            node->type = STACK_TYPE_X509_NAME;

            /* Need a persistent copy of the subject name. */
            node->data.name = wolfSSL_X509_NAME_dup(subjectName);
            if (node->data.name != NULL) {
                /*
                * Original cert will be freed so make sure not to try to access
                * it in the future.
                */
                node->data.name->x509 = NULL;
            }

            /* Put node on the front of the list. */
            node->num  = (list == NULL) ? 1 : list->num + 1;
            node->next = list;
            list = node;

            wolfSSL_X509_free(cert);
            cert = NULL;
        }

        err = wolfSSL_ERR_peek_last_error();

        if (ERR_GET_LIB(err) == ERR_LIB_PEM &&
                ERR_GET_REASON(err) == PEM_R_NO_START_LINE) {
            /*
             * wolfSSL_PEM_read_bio_X509 pushes an ASN_NO_PEM_HEADER error
             * to the error queue on file end. This should not be left
             * for the caller to find so we clear the last error.
             */
            wc_RemoveErrorNode(-1);
        }

        wolfSSL_X509_free(cert);
        wolfSSL_BIO_free(bio);
        return list;
    #else
        (void)fname;
        return NULL;
    #endif
    }
    #endif
#endif /* !NO_BIO */
#endif /* OPENSSL_EXTRA || HAVE_WEBSERVER */

#ifdef OPENSSL_EXTRA
    #if !defined(NO_RSA) && !defined(NO_CERTS)
    int wolfSSL_CTX_add_client_CA(WOLFSSL_CTX* ctx, WOLFSSL_X509* x509)
    {
        WOLFSSL_STACK *node = NULL;
        WOLFSSL_X509_NAME *subjectName = NULL;

        WOLFSSL_ENTER("wolfSSL_CTX_add_client_CA");

        if (ctx == NULL || x509 == NULL){
            WOLFSSL_MSG("Bad argument");
            return SSL_FAILURE;
        }

        subjectName = wolfSSL_X509_get_subject_name(x509);
        if (subjectName == NULL){
            WOLFSSL_MSG("invalid x509 data");
            return SSL_FAILURE;
        }

        /* Alloc stack struct */
        node = (WOLF_STACK_OF(WOLFSSL_X509_NAME)*)XMALLOC(
                                           sizeof(WOLF_STACK_OF(WOLFSSL_X509_NAME)),
                                           NULL, DYNAMIC_TYPE_OPENSSL);
        if (node == NULL){
            WOLFSSL_MSG("memory allocation error");
            return SSL_FAILURE;
        }
        XMEMSET(node, 0, sizeof(WOLF_STACK_OF(WOLFSSL_X509_NAME)));

        /* Alloc and copy WOLFSSL_X509_NAME */
        node->data.name = (WOLFSSL_X509_NAME*)XMALLOC(
                                              sizeof(WOLFSSL_X509_NAME),
                                              NULL, DYNAMIC_TYPE_OPENSSL);
        if (node->data.name == NULL) {
            XFREE(node, NULL, DYNAMIC_TYPE_OPENSSL);
            WOLFSSL_MSG("memory allocation error");
            return SSL_FAILURE;
        }
        XMEMCPY(node->data.name, subjectName, sizeof(WOLFSSL_X509_NAME));
        XMEMSET(subjectName, 0, sizeof(WOLFSSL_X509_NAME));

        /* push new node onto head of stack */
        node->num = (ctx->ca_names == NULL) ? 1 : ctx->ca_names->num + 1;
        node->next = ctx->ca_names;
        ctx->ca_names = node;
        return WOLFSSL_SUCCESS;
    }
    #endif

    #ifndef NO_WOLFSSL_STUB
    int wolfSSL_CTX_set_default_verify_paths(WOLFSSL_CTX* ctx)
    {
        /* TODO:, not needed in goahead */
        (void)ctx;
        WOLFSSL_STUB("SSL_CTX_set_default_verify_paths");
        return SSL_NOT_IMPLEMENTED;
    }
    #endif

    #if defined(WOLFCRYPT_HAVE_SRP) && !defined(NO_SHA256) \
        && !defined(WC_NO_RNG)
    static const byte srp_N[] = {
        0xEE, 0xAF, 0x0A, 0xB9, 0xAD, 0xB3, 0x8D, 0xD6, 0x9C, 0x33, 0xF8,
        0x0A, 0xFA, 0x8F, 0xC5, 0xE8, 0x60, 0x72, 0x61, 0x87, 0x75, 0xFF,
        0x3C, 0x0B, 0x9E, 0xA2, 0x31, 0x4C, 0x9C, 0x25, 0x65, 0x76, 0xD6,
        0x74, 0xDF, 0x74, 0x96, 0xEA, 0x81, 0xD3, 0x38, 0x3B, 0x48, 0x13,
        0xD6, 0x92, 0xC6, 0xE0, 0xE0, 0xD5, 0xD8, 0xE2, 0x50, 0xB9, 0x8B,
        0xE4, 0x8E, 0x49, 0x5C, 0x1D, 0x60, 0x89, 0xDA, 0xD1, 0x5D, 0xC7,
        0xD7, 0xB4, 0x61, 0x54, 0xD6, 0xB6, 0xCE, 0x8E, 0xF4, 0xAD, 0x69,
        0xB1, 0x5D, 0x49, 0x82, 0x55, 0x9B, 0x29, 0x7B, 0xCF, 0x18, 0x85,
        0xC5, 0x29, 0xF5, 0x66, 0x66, 0x0E, 0x57, 0xEC, 0x68, 0xED, 0xBC,
        0x3C, 0x05, 0x72, 0x6C, 0xC0, 0x2F, 0xD4, 0xCB, 0xF4, 0x97, 0x6E,
        0xAA, 0x9A, 0xFD, 0x51, 0x38, 0xFE, 0x83, 0x76, 0x43, 0x5B, 0x9F,
        0xC6, 0x1D, 0x2F, 0xC0, 0xEB, 0x06, 0xE3
    };
    static const byte srp_g[] = {
        0x02
    };

    int wolfSSL_CTX_set_srp_username(WOLFSSL_CTX* ctx, char* username)
    {
        int r = 0;
        SrpSide srp_side = SRP_CLIENT_SIDE;
        byte salt[SRP_SALT_SIZE];

        WOLFSSL_ENTER("wolfSSL_CTX_set_srp_username");
        if (ctx == NULL || ctx->srp == NULL || username==NULL)
            return SSL_FAILURE;

        if (ctx->method->side == WOLFSSL_SERVER_END){
            srp_side = SRP_SERVER_SIDE;
        } else if (ctx->method->side == WOLFSSL_CLIENT_END){
            srp_side = SRP_CLIENT_SIDE;
        } else {
            WOLFSSL_MSG("Init CTX failed");
            return SSL_FAILURE;
        }

        if (wc_SrpInit(ctx->srp, SRP_TYPE_SHA256, srp_side) < 0) {
            WOLFSSL_MSG("Init SRP CTX failed");
            XFREE(ctx->srp, ctx->heap, DYNAMIC_TYPE_SRP);
            ctx->srp = NULL;
            return SSL_FAILURE;
        }
        r = wc_SrpSetUsername(ctx->srp, (const byte*)username,
                              (word32)XSTRLEN(username));
        if (r < 0) {
            WOLFSSL_MSG("fail to set srp username.");
            return SSL_FAILURE;
        }

        /* if wolfSSL_CTX_set_srp_password has already been called, */
        /* execute wc_SrpSetPassword here */
        if (ctx->srp_password != NULL) {
            WC_RNG rng;
            if (wc_InitRng(&rng) < 0){
                WOLFSSL_MSG("wc_InitRng failed");
                return SSL_FAILURE;
            }
            XMEMSET(salt, 0, sizeof(salt)/sizeof(salt[0]));
            r = wc_RNG_GenerateBlock(&rng, salt, sizeof(salt)/sizeof(salt[0]));
            wc_FreeRng(&rng);
            if (r <  0) {
                WOLFSSL_MSG("wc_RNG_GenerateBlock failed");   
                return SSL_FAILURE;
            }

            if (wc_SrpSetParams(ctx->srp, srp_N, sizeof(srp_N)/sizeof(srp_N[0]),
                                srp_g, sizeof(srp_g)/sizeof(srp_g[0]),
                                salt, sizeof(salt)/sizeof(salt[0])) < 0) {
                WOLFSSL_MSG("wc_SrpSetParam failed");
                return SSL_FAILURE;
            }
            r = wc_SrpSetPassword(ctx->srp,
                     (const byte*)ctx->srp_password,
                     (word32)XSTRLEN((char *)ctx->srp_password));
            if (r < 0) {
                WOLFSSL_MSG("fail to set srp password.");
                return SSL_FAILURE;
            }
            
            XFREE(ctx->srp_password, ctx->heap, DYNAMIC_TYPE_SRP);
            ctx->srp_password = NULL;
        }

        return WOLFSSL_SUCCESS;
    }

    int wolfSSL_CTX_set_srp_password(WOLFSSL_CTX* ctx, char* password)
    {
        int r;
        byte salt[SRP_SALT_SIZE];

        WOLFSSL_ENTER("wolfSSL_CTX_set_srp_password");
        if (ctx == NULL || ctx->srp == NULL || password == NULL)
            return SSL_FAILURE;

        if (ctx->srp->user != NULL) {
            WC_RNG rng;
            if (wc_InitRng(&rng) < 0) {
                WOLFSSL_MSG("wc_InitRng failed");
                return SSL_FAILURE;
            }
            XMEMSET(salt, 0, sizeof(salt)/sizeof(salt[0]));
            r = wc_RNG_GenerateBlock(&rng, salt, sizeof(salt)/sizeof(salt[0]));
            wc_FreeRng(&rng);
            if (r <  0) {
                WOLFSSL_MSG("wc_RNG_GenerateBlock failed");
                return SSL_FAILURE;
            }
            if (wc_SrpSetParams(ctx->srp, srp_N, sizeof(srp_N)/sizeof(srp_N[0]),
                                srp_g, sizeof(srp_g)/sizeof(srp_g[0]),
                                salt, sizeof(salt)/sizeof(salt[0])) < 0){
                WOLFSSL_MSG("wc_SrpSetParam failed");
                wc_FreeRng(&rng);
                return SSL_FAILURE;
            }
            r = wc_SrpSetPassword(ctx->srp, (const byte*)password,
                                  (word32)XSTRLEN(password));
            if (r < 0) {
                WOLFSSL_MSG("wc_SrpSetPassword failed.");
                wc_FreeRng(&rng);
                return SSL_FAILURE;
            }
            if (ctx->srp_password != NULL){
                XFREE(ctx->srp_password,NULL,
                      DYNAMIC_TYPE_SRP);
                ctx->srp_password = NULL;
            }
            wc_FreeRng(&rng);
        } else {
            /* save password for wolfSSL_set_srp_username */
            if (ctx->srp_password != NULL)
                XFREE(ctx->srp_password,ctx->heap, DYNAMIC_TYPE_SRP);

            ctx->srp_password = (byte*)XMALLOC(XSTRLEN(password) + 1, ctx->heap,
                                               DYNAMIC_TYPE_SRP);
            if (ctx->srp_password == NULL){
                WOLFSSL_MSG("memory allocation error");
                return SSL_FAILURE;
            }
            XMEMCPY(ctx->srp_password, password, XSTRLEN(password) + 1);
        }
        return WOLFSSL_SUCCESS;
    }

    /**
     * The modulus passed to wc_SrpSetParams in ssl.c is constant so check
     * that the requested strength is less than or equal to the size of the
     * static modulus size.
     * @param ctx Not used
     * @param strength Minimum number of bits for the modulus
     * @return 1 if strength is less than or equal to static modulus
     *         0 if strength is greater than static modulus
     */
    int  wolfSSL_CTX_set_srp_strength(WOLFSSL_CTX *ctx, int strength)
    {
        (void)ctx;
        WOLFSSL_ENTER("wolfSSL_CTX_set_srp_strength");
        if (strength > (int)(sizeof(srp_N)*8)) {
            WOLFSSL_MSG("Bad Parameter");
            return WOLFSSL_FAILURE;
        }
        return WOLFSSL_SUCCESS;
    }

    char* wolfSSL_get_srp_username(WOLFSSL *ssl)
    {
        if (ssl && ssl->ctx && ssl->ctx->srp) {
            return (char*) ssl->ctx->srp->user;
        }
        return NULL;
    }
    #endif /* WOLFCRYPT_HAVE_SRP && !NO_SHA256 && !WC_NO_RNG */

    /* keyblock size in bytes or -1 */
    int wolfSSL_get_keyblock_size(WOLFSSL* ssl)
    {
        if (ssl == NULL)
            return WOLFSSL_FATAL_ERROR;

        return 2 * (ssl->specs.key_size + ssl->specs.iv_size +
                    ssl->specs.hash_size);
    }

#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)

    /* store keys returns WOLFSSL_SUCCESS or -1 on error */
    int wolfSSL_get_keys(WOLFSSL* ssl, unsigned char** ms, unsigned int* msLen,
                                     unsigned char** sr, unsigned int* srLen,
                                     unsigned char** cr, unsigned int* crLen)
    {
        if (ssl == NULL || ssl->arrays == NULL)
            return WOLFSSL_FATAL_ERROR;

        *ms = ssl->arrays->masterSecret;
        *sr = ssl->arrays->serverRandom;
        *cr = ssl->arrays->clientRandom;

        *msLen = SECRET_LEN;
        *srLen = RAN_LEN;
        *crLen = RAN_LEN;

        return WOLFSSL_SUCCESS;
    }

    void wolfSSL_set_accept_state(WOLFSSL* ssl)
    {
        WOLFSSL_ENTER("wolfSSL_set_accept_state");
        if (ssl->options.side == WOLFSSL_CLIENT_END) {
    #ifdef HAVE_ECC
            ecc_key key;
            word32 idx = 0;

            if (ssl->options.haveStaticECC && ssl->buffers.key != NULL) {
                if (wc_ecc_init(&key) >= 0) {
                    if (wc_EccPrivateKeyDecode(ssl->buffers.key->buffer, &idx, &key,
                                                   ssl->buffers.key->length) != 0) {
                        ssl->options.haveECDSAsig = 0;
                        ssl->options.haveECC = 0;
                        ssl->options.haveStaticECC = 0;
                    }
                    wc_ecc_free(&key);
                }
            }
    #endif

    #ifndef NO_DH
            if (!ssl->options.haveDH && ssl->ctx->haveDH) {
                ssl->buffers.serverDH_P = ssl->ctx->serverDH_P;
                ssl->buffers.serverDH_G = ssl->ctx->serverDH_G;
                ssl->options.haveDH = 1;
            }
    #endif
        }

        if (InitSSL_Side(ssl, WOLFSSL_SERVER_END) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Error initializing server side");
        }
    }

#endif /* OPENSSL_EXTRA || WOLFSSL_EXTRA || WOLFSSL_WPAS_SMALL */

    /* return true if connection established */
    int wolfSSL_is_init_finished(WOLFSSL* ssl)
    {
        if (ssl == NULL)
            return 0;

        if (ssl->options.handShakeState == HANDSHAKE_DONE)
            return 1;

        return 0;
    }

#ifdef OPENSSL_EXTRA

    void wolfSSL_CTX_set_tmp_rsa_callback(WOLFSSL_CTX* ctx,
                                      WOLFSSL_RSA*(*f)(WOLFSSL*, int, int))
    {
        /* wolfSSL verifies all these internally */
        (void)ctx;
        (void)f;
    }


    void wolfSSL_set_shutdown(WOLFSSL* ssl, int opt)
    {
        WOLFSSL_ENTER("wolfSSL_set_shutdown");
        if(ssl==NULL) {
            WOLFSSL_MSG("Shutdown not set. ssl is null");
            return;
        }

        ssl->options.sentNotify =  (opt&WOLFSSL_SENT_SHUTDOWN) > 0;
        ssl->options.closeNotify = (opt&WOLFSSL_RECEIVED_SHUTDOWN) > 0;
    }


    long wolfSSL_CTX_get_options(WOLFSSL_CTX* ctx)
    {
        WOLFSSL_ENTER("wolfSSL_CTX_get_options");
        WOLFSSL_MSG("wolfSSL options are set through API calls and macros");
        if(ctx == NULL)
            return BAD_FUNC_ARG;
        return ctx->mask;
    }

#endif

    static long wolf_set_options(long old_op, long op);
    long wolfSSL_CTX_set_options(WOLFSSL_CTX* ctx, long opt)
    {
        WOLFSSL_ENTER("SSL_CTX_set_options");

        if (ctx == NULL)
            return BAD_FUNC_ARG;

        ctx->mask = wolf_set_options(ctx->mask, opt);

#if defined(HAVE_SESSION_TICKET) && !defined(NO_WOLFSSL_SERVER) && \
    defined(OPENSSL_EXTRA)
        if (ctx->mask & SSL_OP_NO_TICKET) {
            ctx->ticketEncCb = NULL;
            ctx->ticketEncCtx = NULL;
            WOLFSSL_MSG("\tSSL_OP_NO_TICKET");
        }
#endif

        return ctx->mask;
    }

#ifdef OPENSSL_EXTRA

    long wolfSSL_CTX_clear_options(WOLFSSL_CTX* ctx, long opt)
    {
        WOLFSSL_ENTER("SSL_CTX_clear_options");
        if(ctx == NULL)
            return BAD_FUNC_ARG;
        ctx->mask &= ~opt;
        return ctx->mask;
    }

    int wolfSSL_set_rfd(WOLFSSL* ssl, int rfd)
    {
        WOLFSSL_ENTER("SSL_set_rfd");
        ssl->rfd = rfd;      /* not used directly to allow IO callbacks */

        ssl->IOCB_ReadCtx  = &ssl->rfd;

    #ifdef WOLFSSL_DTLS
        if (ssl->options.dtls) {
            ssl->IOCB_ReadCtx = &ssl->buffers.dtlsCtx;
            ssl->buffers.dtlsCtx.rfd = rfd;
        }
    #endif

        return WOLFSSL_SUCCESS;
    }


    int wolfSSL_set_wfd(WOLFSSL* ssl, int wfd)
    {
        WOLFSSL_ENTER("SSL_set_wfd");
        ssl->wfd = wfd;      /* not used directly to allow IO callbacks */

        ssl->IOCB_WriteCtx  = &ssl->wfd;

        return WOLFSSL_SUCCESS;
    }
#endif /* OPENSSL_EXTRA */

#if !defined(NO_CERTS) && (defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL))
    WOLFSSL_X509_STORE* wolfSSL_CTX_get_cert_store(WOLFSSL_CTX* ctx)
    {
        if (ctx == NULL) {
            return NULL;
        }

        return &ctx->x509_store;
    }

    void wolfSSL_CTX_set_cert_store(WOLFSSL_CTX* ctx, WOLFSSL_X509_STORE* str)
    {
        if (ctx == NULL || str == NULL || ctx->cm == str->cm) {
            return;
        }

        if (wolfSSL_CertManager_up_ref(str->cm) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("wolfSSL_CertManager_up_ref error");
            return;
        }
        /* free cert manager if have one */
        if (ctx->cm != NULL) {
            wolfSSL_CertManagerFree(ctx->cm);
        }
        ctx->cm               = str->cm;
        ctx->x509_store.cm    = str->cm;

        /* free existing store if it exists */
        wolfSSL_X509_STORE_free(ctx->x509_store_pt);
        ctx->x509_store.cache = str->cache;
        ctx->x509_store_pt    = str; /* take ownership of store and free it
                                        with CTX free */
        ctx->cm->x509_store_p = ctx->x509_store_pt;/* CTX has onwership
                                                    and free it with CTX free*/
    }


#endif /* !NO_CERTS && (OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL) */

#ifdef OPENSSL_EXTRA
#ifndef NO_BIO
    WOLFSSL_BIO_METHOD* wolfSSL_BIO_f_md(void)
    {
        static WOLFSSL_BIO_METHOD meth;

        WOLFSSL_ENTER("wolfSSL_BIO_f_md");
        meth.type = WOLFSSL_BIO_MD;

        return &meth;
    }

    /* return the context and initialize the BIO state */
    int wolfSSL_BIO_get_md_ctx(WOLFSSL_BIO *bio, WOLFSSL_EVP_MD_CTX **mdcp)
    {
        int ret = WOLFSSL_FAILURE;

        if ((bio != NULL) && (mdcp != NULL)) {
            *mdcp = (WOLFSSL_EVP_MD_CTX*)bio->ptr;
            ret = WOLFSSL_SUCCESS;
        }

        return ret;
    }

    WOLFSSL_BIO_METHOD* wolfSSL_BIO_f_buffer(void)
    {
        static WOLFSSL_BIO_METHOD meth;

        WOLFSSL_ENTER("BIO_f_buffer");
        meth.type = WOLFSSL_BIO_BUFFER;

        return &meth;
    }

    #ifndef NO_WOLFSSL_STUB
    long wolfSSL_BIO_set_write_buffer_size(WOLFSSL_BIO* bio, long size)
    {
        /* wolfSSL has internal buffer, compatibility only */
        WOLFSSL_ENTER("BIO_set_write_buffer_size");
        WOLFSSL_MSG("Buffer resize failed");
        WOLFSSL_STUB("BIO_set_write_buffer_size");
        (void)bio;
        (void) size;

        /* Even though this is only a STUB at the moment many user applications
         * may attempt to use this. OpenSSL documentation specifies the return
         * "return 1 if the buffer was successfully resized or 0 for failure."
         * since wolfSSL does not resize the buffer will always return failure
         * by default due to memory concerns until this stub is promoted to
         * a non-stub function */
        return WOLFSSL_FAILURE; /* 0, no resize happened */
    }
    #endif

    WOLFSSL_BIO_METHOD* wolfSSL_BIO_s_bio(void)
    {
        static WOLFSSL_BIO_METHOD bio_meth;

        WOLFSSL_ENTER("wolfSSL_BIO_s_bio");
        bio_meth.type = WOLFSSL_BIO_BIO;

        return &bio_meth;
    }


#ifndef NO_FILESYSTEM
    WOLFSSL_BIO_METHOD* wolfSSL_BIO_s_file(void)
    {
        static WOLFSSL_BIO_METHOD file_meth;

        WOLFSSL_ENTER("wolfSSL_BIO_s_file");
        file_meth.type = WOLFSSL_BIO_FILE;

        return &file_meth;
    }
#endif


    WOLFSSL_BIO_METHOD* wolfSSL_BIO_f_ssl(void)
    {
        static WOLFSSL_BIO_METHOD meth;

        WOLFSSL_ENTER("wolfSSL_BIO_f_ssl");
        meth.type = WOLFSSL_BIO_SSL;

        return &meth;
    }


    WOLFSSL_BIO_METHOD *wolfSSL_BIO_s_socket(void)
    {
        static WOLFSSL_BIO_METHOD meth;

        WOLFSSL_ENTER("wolfSSL_BIO_s_socket");
        meth.type = WOLFSSL_BIO_SOCKET;

        return &meth;
    }


    WOLFSSL_BIO* wolfSSL_BIO_new_socket(int sfd, int closeF)
    {
        WOLFSSL_BIO* bio = wolfSSL_BIO_new(wolfSSL_BIO_s_socket());

        WOLFSSL_ENTER("BIO_new_socket");
        if (bio) {
            bio->type  = WOLFSSL_BIO_SOCKET;
            bio->shutdown = (byte)closeF;
            bio->num   = sfd;
        }
        return bio;
    }

    /**
     * Create new socket BIO object. This is a pure TCP connection with
     * no SSL or TLS protection.
     * @param str IP address to connect to
     * @return New BIO object or NULL on failure
     */
    WOLFSSL_BIO *wolfSSL_BIO_new_connect(const char *str)
    {
        WOLFSSL_BIO *bio;
        WOLFSSL_ENTER("wolfSSL_BIO_new_connect");
        bio = wolfSSL_BIO_new(wolfSSL_BIO_s_socket());
        if (bio) {
            bio->ip = str;
            bio->type  = WOLFSSL_BIO_SOCKET;
        }
        return bio;
    }

    /**
     * Set the port to connect to in the BIO object
     * @param b BIO object
     * @param port destination port
     * @return WOLFSSL_SUCCESS on success and WOLFSSL_FAILURE on failure
     */
    long wolfSSL_BIO_set_conn_port(WOLFSSL_BIO *b, char* port)
    {
        int p;
        WOLFSSL_ENTER("wolfSSL_BIO_set_conn_port");

        if (!b || !port) {
            WOLFSSL_ENTER("Bad parameter");
            return WOLFSSL_FAILURE;
        }

        p = XATOI(port);
        if (!p || p < 0) {
            WOLFSSL_ENTER("Port parsing error");
            return WOLFSSL_FAILURE;
        }

        b->port = (word16)p;
        return WOLFSSL_SUCCESS;
    }

#ifdef HAVE_HTTP_CLIENT
    /**
     * Attempt to connect to the destination address and port
     * @param b BIO object
     * @return WOLFSSL_SUCCESS on success and WOLFSSL_FAILURE on failure
     */
    long wolfSSL_BIO_do_connect(WOLFSSL_BIO *b)
    {
        SOCKET_T sfd = SOCKET_INVALID;
        WOLFSSL_ENTER("wolfSSL_BIO_do_connect");

        if (!b) {
            WOLFSSL_ENTER("Bad parameter");
            return WOLFSSL_FAILURE;
        }

        while (b && b->type != WOLFSSL_BIO_SOCKET)
            b = b->next;

        if (!b) {
            WOLFSSL_ENTER("No socket BIO in chain");
            return WOLFSSL_FAILURE;
        }

        if (wolfIO_TcpConnect(&sfd, b->ip, b->port, 0) < 0 ) {
            WOLFSSL_ENTER("wolfIO_TcpConnect error");
            return WOLFSSL_FAILURE;
        }

        b->num = sfd;
        b->shutdown = BIO_CLOSE;
        return WOLFSSL_SUCCESS;
    }
#endif /* HAVE_HTTP_CLIENT */

    int wolfSSL_BIO_eof(WOLFSSL_BIO* b)
    {
        WOLFSSL_ENTER("BIO_eof");
        if ((b != NULL) && (b->eof))
            return 1;

        return 0;
    }

    long wolfSSL_BIO_do_handshake(WOLFSSL_BIO *b)
    {
        WOLFSSL_ENTER("wolfSSL_BIO_do_handshake");
        if (b == NULL) {
            WOLFSSL_MSG("Bad parameter");
            return WOLFSSL_FAILURE;
        }
        if (b->type == WOLFSSL_BIO_SSL && b->ptr != NULL) {
            return wolfSSL_negotiate((WOLFSSL*)b->ptr);
        }
        else {
            WOLFSSL_MSG("Not SSL BIO or no SSL object set");
            return WOLFSSL_FAILURE;
        }
    }

    long wolfSSL_BIO_set_ssl(WOLFSSL_BIO* b, WOLFSSL* ssl, int closeF)
    {
        long ret = WOLFSSL_FAILURE;

        WOLFSSL_ENTER("wolfSSL_BIO_set_ssl");

        if (b != NULL) {
            b->ptr   = ssl;
            b->shutdown = (byte)closeF;
            if (b->next != NULL)
                wolfSSL_set_bio(ssl, b->next, b->next);
    /* add to ssl for bio free if SSL_free called before/instead of free_all? */
            ret = WOLFSSL_SUCCESS;
        }

        return ret;
    }

#ifndef NO_FILESYSTEM
    long wolfSSL_BIO_set_fd(WOLFSSL_BIO* b, int fd, int closeF)
    {
        WOLFSSL_ENTER("wolfSSL_BIO_set_fd");

        if (b != NULL) {
            b->num = fd;
            b->shutdown = (byte)closeF;
        }

        return WOLFSSL_SUCCESS;
    }
#endif

    /* Sets the close flag */
    int wolfSSL_BIO_set_close(WOLFSSL_BIO *b, long flag)
    {
        WOLFSSL_ENTER("wolfSSL_BIO_set_close");
        if (b != NULL) {
            b->shutdown = (byte)flag;
        }

        return WOLFSSL_SUCCESS;
    }

#if defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x10100000L
    WOLFSSL_BIO* wolfSSL_BIO_new(const WOLFSSL_BIO_METHOD* method)
#else
    WOLFSSL_BIO* wolfSSL_BIO_new(WOLFSSL_BIO_METHOD* method)
#endif
    {
        WOLFSSL_BIO* bio;

        WOLFSSL_ENTER("wolfSSL_BIO_new");
        if (method == NULL) {
            WOLFSSL_MSG("Bad method pointer passed in");
            return NULL;
        }

        bio = (WOLFSSL_BIO*) XMALLOC(sizeof(WOLFSSL_BIO), 0,
                DYNAMIC_TYPE_OPENSSL);
        if (bio) {
            XMEMSET(bio, 0, sizeof(WOLFSSL_BIO));
            bio->type = (byte)method->type;
#if defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x10100000L
            bio->method = (WOLFSSL_BIO_METHOD*)method;
#else
            bio->method = method;
#endif
            bio->shutdown = BIO_CLOSE; /* default to close things */
            bio->num = -1; /* Default to invalid socket */
            bio->init = 1;
            if (method->type != WOLFSSL_BIO_FILE &&
                    method->type != WOLFSSL_BIO_SOCKET &&
                    method->type != WOLFSSL_BIO_MD) {
                bio->mem_buf =(WOLFSSL_BUF_MEM*)XMALLOC(sizeof(WOLFSSL_BUF_MEM),
                                                       0, DYNAMIC_TYPE_OPENSSL);
                if (bio->mem_buf == NULL) {
                    WOLFSSL_MSG("Memory error");
                    wolfSSL_BIO_free(bio);
                    return NULL;
                }
                bio->mem_buf->data = (char*)bio->ptr;
            }

            if (method->type == WOLFSSL_BIO_MD) {
                bio->ptr = wolfSSL_EVP_MD_CTX_new();
                if (bio->ptr == NULL) {
                    WOLFSSL_MSG("Memory error");
                    wolfSSL_BIO_free(bio);
                    return NULL;
                }
            }

            /* check if is custom method */
            if (method->createCb) {
                method->createCb(bio);
            }
        }
        return bio;
    }

    WOLFSSL_BIO* wolfSSL_BIO_new_mem_buf(const void* buf, int len)
    {
        WOLFSSL_BIO* bio = NULL;

        if (buf == NULL) {
            return bio;
        }

        bio = wolfSSL_BIO_new(wolfSSL_BIO_s_mem());
        if (bio == NULL) {
            return bio;
        }

        if (len < 0) {
            /* The length of the string including terminating null. */
            len = (int)XSTRLEN((const char*)buf) + 1;
        }
        bio->num = bio->wrSz = len;
        bio->ptr = (byte*)XMALLOC(len, 0, DYNAMIC_TYPE_OPENSSL);
        if (bio->ptr == NULL) {
            wolfSSL_BIO_free(bio);
            return NULL;
        }
        if (bio->mem_buf != NULL) {
            bio->mem_buf->data = (char*)bio->ptr;
            bio->mem_buf->length = bio->num;
        }

        XMEMCPY(bio->ptr, buf, len);

        return bio;
    }

    /*
     * Note : If the flag BIO_NOCLOSE is set then freeing memory buffers is up
     *        to the application.
     * Returns 1 on success, 0 on failure
     */
    int wolfSSL_BIO_free(WOLFSSL_BIO* bio)
    {
        int ret;

        /* unchain?, doesn't matter in goahead since from free all */
        WOLFSSL_ENTER("wolfSSL_BIO_free");
        if (bio) {
#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
            wolfSSL_CRYPTO_cleanup_ex_data(&bio->ex_data);
#endif
            if (bio->infoCb) {
                /* info callback is called before free */
                ret = (int)bio->infoCb(bio, WOLFSSL_BIO_CB_FREE, NULL, 0, 0, 1);
                if (ret <= 0) {
                    return ret;
                }
            }

            /* call custom set free callback */
            if (bio->method && bio->method->freeCb) {
                bio->method->freeCb(bio);
            }

            /* remove from pair by setting the paired bios pair to NULL */
            if (bio->pair != NULL) {
                bio->pair->pair = NULL;
            }

            if (bio->shutdown) {
                if (bio->type == WOLFSSL_BIO_SSL && bio->ptr)
                    wolfSSL_free((WOLFSSL*)bio->ptr);
            #ifdef CloseSocket
                if (bio->type == WOLFSSL_BIO_SOCKET && bio->num)
                    CloseSocket(bio->num);
             #endif
            }

        #ifndef NO_FILESYSTEM
            if (bio->type == WOLFSSL_BIO_FILE && bio->shutdown == BIO_CLOSE) {
                if (bio->ptr) {
                    XFCLOSE((XFILE)bio->ptr);
                }
            #if !defined(USE_WINDOWS_API) && !defined(NO_WOLFSSL_DIR)\
                && !defined(WOLFSSL_NUCLEUS) && !defined(WOLFSSL_NUCLEUS_1_2)
                else if (bio->num != -1) {
                    XCLOSE(bio->num);
                }
            #endif
            }
        #endif

            if (bio->shutdown != BIO_NOCLOSE) {
                if (bio->type == WOLFSSL_BIO_MEMORY && bio->ptr != NULL) {
                    if (bio->mem_buf != NULL) {
                        if (bio->mem_buf->data != (char*)bio->ptr) {
                            XFREE(bio->ptr, bio->heap, DYNAMIC_TYPE_OPENSSL);
                            bio->ptr = NULL;
                        }
                    }
                    else {
                        XFREE(bio->ptr, bio->heap, DYNAMIC_TYPE_OPENSSL);
                        bio->ptr = NULL;
                    }
                }
                if (bio->mem_buf != NULL) {
                    wolfSSL_BUF_MEM_free(bio->mem_buf);
                    bio->mem_buf = NULL;
                }
            }

            if (bio->type == WOLFSSL_BIO_MD) {
                wolfSSL_EVP_MD_CTX_free((WOLFSSL_EVP_MD_CTX*)bio->ptr);
            }

            XFREE(bio, 0, DYNAMIC_TYPE_OPENSSL);
            return WOLFSSL_SUCCESS;
        }
        return WOLFSSL_FAILURE;
    }

    /* like BIO_free, but no return value */
    void wolfSSL_BIO_vfree(WOLFSSL_BIO* bio)
    {
        wolfSSL_BIO_free(bio);
    }


    void wolfSSL_BIO_free_all(WOLFSSL_BIO* bio)
    {
        WOLFSSL_ENTER("BIO_free_all");
        while (bio) {
            WOLFSSL_BIO* next = bio->next;
            wolfSSL_BIO_free(bio);
            bio = next;
        }
    }


    WOLFSSL_BIO* wolfSSL_BIO_push(WOLFSSL_BIO* top, WOLFSSL_BIO* append)
    {
        WOLFSSL_ENTER("BIO_push");
        top->next    = append;
        append->prev = top;

        /* SSL BIO's should use the next object in the chain for IO */
        if (top->type == WOLFSSL_BIO_SSL && top->ptr)
            wolfSSL_set_bio((WOLFSSL*)top->ptr, append, append);

        return top;
    }
#endif /* !NO_BIO */
#endif /* OPENSSL_EXTRA */

#ifdef WOLFSSL_ENCRYPTED_KEYS

    void wolfSSL_CTX_set_default_passwd_cb_userdata(WOLFSSL_CTX* ctx,
                                                   void* userdata)
    {
        WOLFSSL_ENTER("SSL_CTX_set_default_passwd_cb_userdata");
        if (ctx)
            ctx->passwd_userdata = userdata;
    }


    void wolfSSL_CTX_set_default_passwd_cb(WOLFSSL_CTX* ctx,pem_password_cb* cb)
    {
        WOLFSSL_ENTER("SSL_CTX_set_default_passwd_cb");
        if (ctx)
            ctx->passwd_cb = cb;
    }

    pem_password_cb* wolfSSL_CTX_get_default_passwd_cb(WOLFSSL_CTX *ctx)
    {
        if (ctx == NULL || ctx->passwd_cb == NULL) {
            return NULL;
        }

        return ctx->passwd_cb;
    }


    void* wolfSSL_CTX_get_default_passwd_cb_userdata(WOLFSSL_CTX *ctx)
    {
        if (ctx == NULL) {
            return NULL;
        }

        return ctx->passwd_userdata;
    }

#endif /* WOLFSSL_ENCRYPTED_KEYS */


#if defined(OPENSSL_EXTRA) || defined(HAVE_WEBSERVER)
    int wolfSSL_num_locks(void)
    {
        return 0;
    }

    void wolfSSL_set_locking_callback(void (*f)(int, int, const char*, int))
    {
        WOLFSSL_ENTER("wolfSSL_set_locking_callback");

        if (wc_SetMutexCb(f) != 0) {
            WOLFSSL_MSG("Error when setting mutex call back");
        }
    }


    typedef unsigned long (idCb)(void);
    static idCb* inner_idCb = NULL;

    unsigned long wolfSSL_thread_id(void)
    {
        if (inner_idCb != NULL) {
            return inner_idCb();
        }
        else {
            return 0;
        }
    }


    void wolfSSL_set_id_callback(unsigned long (*f)(void))
    {
        inner_idCb = f;
    }

    unsigned long wolfSSL_ERR_get_error(void)
    {
        WOLFSSL_ENTER("wolfSSL_ERR_get_error");

#if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY)
        {
            unsigned long ret = wolfSSL_ERR_peek_error_line_data(NULL, NULL,
                                                                 NULL, NULL);
            wc_RemoveErrorNode(-1);
            return ret;
        }
#elif (defined(OPENSSL_EXTRA) || defined(DEBUG_WOLFSSL_VERBOSE))
        {
            int ret = wc_PullErrorNode(NULL, NULL, NULL);

            if (ret < 0) {
                if (ret == BAD_STATE_E) return 0; /* no errors in queue */
                WOLFSSL_MSG("Error with pulling error node!");
                WOLFSSL_LEAVE("wolfSSL_ERR_get_error", ret);
                ret = 0 - ret; /* return absolute value of error */

                /* panic and try to clear out nodes */
                wc_ClearErrorNodes();
            }

            return (unsigned long)ret;
        }
#else
        return (unsigned long)(0 - NOT_COMPILED_IN);
#endif
    }

#if (defined(OPENSSL_EXTRA) || defined(DEBUG_WOLFSSL_VERBOSE))
#ifndef NO_BIO
    /* print out and clear all errors */
    void wolfSSL_ERR_print_errors(WOLFSSL_BIO* bio)
    {
        const char* file = NULL;
        const char* reason = NULL;
        int ret;
        int line = 0;
        char buf[WOLFSSL_MAX_ERROR_SZ * 2];

        WOLFSSL_ENTER("wolfSSL_ERR_print_errors");

        if (bio == NULL) {
            WOLFSSL_MSG("BIO passed in was null");
            return;
        }

        do {
        ret = wc_PeekErrorNode(0, &file, &reason, &line);
        if (ret >= 0) {
            const char* r = wolfSSL_ERR_reason_error_string(0 - ret);
            XSNPRINTF(buf, sizeof(buf), "error:%d:wolfSSL library:%s:%s:%d\n",
                    ret, r, file, line);
            wolfSSL_BIO_write(bio, buf, (int)XSTRLEN(buf));
            wc_RemoveErrorNode(0);
        }
        } while (ret >= 0);
        if (wolfSSL_BIO_write(bio, "", 1) != 1) {
            WOLFSSL_MSG("Issue writing final string terminator");
        }
    }
#endif /* !NO_BIO */
#endif /* OPENSSL_EXTRA || DEBUG_WOLFSSL_VERBOSE */

#endif /* OPENSSL_EXTRA || HAVE_WEBSERVER */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL) || \
    defined(HAVE_SECRET_CALLBACK)
#if !defined(NO_WOLFSSL_SERVER)
size_t wolfSSL_get_server_random(const WOLFSSL *ssl, unsigned char *out,
                                                                   size_t outSz)
{
    size_t size;

    /* return max size of buffer */
    if (outSz == 0) {
        return RAN_LEN;
    }

    if (ssl == NULL || out == NULL) {
        return 0;
    }

    if (ssl->options.saveArrays == 0 || ssl->arrays == NULL) {
        WOLFSSL_MSG("Arrays struct not saved after handshake");
        return 0;
    }

    if (outSz > RAN_LEN) {
        size = RAN_LEN;
    }
    else {
        size = outSz;
    }

    XMEMCPY(out, ssl->arrays->serverRandom, size);
    return size;
}
#endif /* !NO_WOLFSSL_SERVER */
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL || HAVE_SECRET_CALLBACK */

#ifdef OPENSSL_EXTRA
#if !defined(NO_WOLFSSL_SERVER)
/* Used to get the peer ephemeral public key sent during the connection
 * NOTE: currently wolfSSL_KeepHandshakeResources(WOLFSSL* ssl) must be called
 *       before the ephemeral key is stored.
 * return WOLFSSL_SUCCESS on success */
int wolfSSL_get_server_tmp_key(const WOLFSSL* ssl, WOLFSSL_EVP_PKEY** pkey)
{
    WOLFSSL_EVP_PKEY* ret = NULL;

    WOLFSSL_ENTER("wolfSSL_get_server_tmp_key");

    if (ssl == NULL || pkey == NULL) {
        WOLFSSL_MSG("Bad argument passed in");
        return WOLFSSL_FAILURE;
    }

#ifdef HAVE_ECC
    if (ssl->peerEccKey != NULL) {
        unsigned char* der;
        const unsigned char* pt;
        unsigned int   derSz = 0;
        int sz;

        if (wc_ecc_export_x963(ssl->peerEccKey, NULL, &derSz) !=
                LENGTH_ONLY_E) {
            WOLFSSL_MSG("get ecc der size failed");
            return WOLFSSL_FAILURE;
        }

        derSz += MAX_SEQ_SZ + (2 * MAX_ALGO_SZ) + MAX_SEQ_SZ + TRAILING_ZERO;
        der = (unsigned char*)XMALLOC(derSz, ssl->heap, DYNAMIC_TYPE_KEY);
        if (der == NULL) {
            WOLFSSL_MSG("Memory error");
            return WOLFSSL_FAILURE;
        }

        if ((sz = wc_EccPublicKeyToDer(ssl->peerEccKey, der, derSz, 1)) <= 0) {
            WOLFSSL_MSG("get ecc der failed");
            XFREE(der, ssl->heap, DYNAMIC_TYPE_KEY);
            return WOLFSSL_FAILURE;
        }
        pt = der; /* in case pointer gets advanced */
        ret = wolfSSL_d2i_PUBKEY(NULL, &pt, sz);
        XFREE(der, ssl->heap, DYNAMIC_TYPE_KEY);
    }
#endif

    *pkey = ret;
#ifdef HAVE_ECC
    if (ret != NULL)
        return WOLFSSL_SUCCESS;
    else
#endif
        return WOLFSSL_FAILURE;
}

#endif /* !NO_WOLFSSL_SERVER */

/**
 * This function checks if any compiled in protocol versions are
 * left enabled after calls to set_min or set_max API.
 * @param ctx The WOLFSSL_CTX to check
 * @return WOLFSSL_SUCCESS on valid settings and WOLFSSL_FAILURE when no
 *         protocol versions are left enabled.
 */
static int CheckSslMethodVersion(byte major, unsigned long options)
{
    int sanityConfirmed = 0;

    (void)options;

    switch (major) {
    #ifndef NO_TLS
        case SSLv3_MAJOR:
            #ifdef WOLFSSL_ALLOW_SSLV3
                if (!(options & WOLFSSL_OP_NO_SSLv3)) {
                    sanityConfirmed = 1;
                }
            #endif
            #ifndef NO_OLD_TLS
                if (!(options & WOLFSSL_OP_NO_TLSv1))
                    sanityConfirmed = 1;
                if (!(options & WOLFSSL_OP_NO_TLSv1_1))
                    sanityConfirmed = 1;
            #endif
            #ifndef WOLFSSL_NO_TLS12
                if (!(options & WOLFSSL_OP_NO_TLSv1_2))
                    sanityConfirmed = 1;
            #endif
            #ifdef WOLFSSL_TLS13
                if (!(options & WOLFSSL_OP_NO_TLSv1_3))
                    sanityConfirmed = 1;
            #endif
            break;
    #endif
    #ifdef WOLFSSL_DTLS
        case DTLS_MAJOR:
            sanityConfirmed = 1;
            break;
    #endif
        default:
            WOLFSSL_MSG("Invalid major version");
            return WOLFSSL_FAILURE;
    }
    if (!sanityConfirmed) {
        WOLFSSL_MSG("All compiled in TLS versions disabled");
        return WOLFSSL_FAILURE;
    }
    return WOLFSSL_SUCCESS;
}

/**
 * This function attempts to set the minimum protocol version to use by SSL
 * objects created from this WOLFSSL_CTX. This API guarantees that a version
 * of SSL/TLS lower than specified here will not be allowed. If the version
 * specified is not compiled in then this API sets the lowest compiled in
 * protocol version. CheckSslMethodVersion() is called to check if any
 * remaining protocol versions are enabled.
 * @param ctx
 * @param version Any of the following
 *          * SSL3_VERSION
 *          * TLS1_VERSION
 *          * TLS1_1_VERSION
 *          * TLS1_2_VERSION
 *          * TLS1_3_VERSION
 *          * DTLS1_VERSION
 *          * DTLS1_2_VERSION
 * @return WOLFSSL_SUCCESS on valid settings and WOLFSSL_FAILURE when no
 *         protocol versions are left enabled.
 */
int wolfSSL_CTX_set_min_proto_version(WOLFSSL_CTX* ctx, int version)
{
    WOLFSSL_ENTER("wolfSSL_CTX_set_min_proto_version");

    if (ctx == NULL) {
        return WOLFSSL_FAILURE;
    }

    switch (version) {
#ifndef NO_TLS
        case SSL3_VERSION:
#if defined(WOLFSSL_ALLOW_SSLV3) && !defined(NO_OLD_TLS)
            ctx->minDowngrade = SSLv3_MINOR;
            break;
#endif
        case TLS1_VERSION:
        #ifdef WOLFSSL_ALLOW_TLSV10
            ctx->minDowngrade = TLSv1_MINOR;
            break;
        #endif
        case TLS1_1_VERSION:
        #ifndef NO_OLD_TLS
            ctx->minDowngrade = TLSv1_1_MINOR;
            break;
        #endif
        case TLS1_2_VERSION:
        #ifndef WOLFSSL_NO_TLS12
            ctx->minDowngrade = TLSv1_2_MINOR;
            break;
        #endif
        case TLS1_3_VERSION:
        #ifdef WOLFSSL_TLS13
            ctx->minDowngrade = TLSv1_3_MINOR;
            break;
        #endif
#endif
#ifdef WOLFSSL_DTLS
        case DTLS1_VERSION:
    #ifndef NO_OLD_TLS
            ctx->minDowngrade = DTLS_MINOR;
            break;
    #endif
        case DTLS1_2_VERSION:
            ctx->minDowngrade = DTLSv1_2_MINOR;
            break;
#endif
        default:
            WOLFSSL_MSG("Unrecognized protocol version or not compiled in");
            return WOLFSSL_FAILURE;
    }

    switch (version) {
#ifndef NO_TLS
    case TLS1_3_VERSION:
        wolfSSL_CTX_set_options(ctx, WOLFSSL_OP_NO_TLSv1_2);
        FALL_THROUGH;
    case TLS1_2_VERSION:
        wolfSSL_CTX_set_options(ctx, WOLFSSL_OP_NO_TLSv1_1);
        FALL_THROUGH;
    case TLS1_1_VERSION:
        wolfSSL_CTX_set_options(ctx, WOLFSSL_OP_NO_TLSv1);
        FALL_THROUGH;
    case TLS1_VERSION:
        wolfSSL_CTX_set_options(ctx, WOLFSSL_OP_NO_SSLv3);
        break;
    case SSL3_VERSION:
    case SSL2_VERSION:
        /* Nothing to do here */
        break;
#endif
#ifdef WOLFSSL_DTLS
    case DTLS1_VERSION:
    case DTLS1_2_VERSION:
        break;
#endif
    default:
        WOLFSSL_MSG("Unrecognized protocol version or not compiled in");
        return WOLFSSL_FAILURE;
    }

    return CheckSslMethodVersion(ctx->method->version.major, ctx->mask);
}

/**
 * This function attempts to set the maximum protocol version to use by SSL
 * objects created from this WOLFSSL_CTX. This API guarantees that a version
 * of SSL/TLS higher than specified here will not be allowed. If the version
 * specified is not compiled in then this API sets the highest compiled in
 * protocol version. CheckSslMethodVersion() is called to check if any
 * remaining protocol versions are enabled.
 * @param ctx
 * @param version Any of the following
 *          * SSL3_VERSION
 *          * TLS1_VERSION
 *          * TLS1_1_VERSION
 *          * TLS1_2_VERSION
 *          * TLS1_3_VERSION
 *          * DTLS1_VERSION
 *          * DTLS1_2_VERSION
 * @return WOLFSSL_SUCCESS on valid settings and WOLFSSL_FAILURE when no
 *         protocol versions are left enabled.
 */
int wolfSSL_CTX_set_max_proto_version(WOLFSSL_CTX* ctx, int ver)
{
    WOLFSSL_ENTER("wolfSSL_CTX_set_max_proto_version");

    if (!ctx || !ctx->method) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    switch (ver) {
    case SSL2_VERSION:
        WOLFSSL_MSG("wolfSSL does not support SSLv2");
        return WOLFSSL_FAILURE;
#ifndef NO_TLS
    case SSL3_VERSION:
        wolfSSL_CTX_set_options(ctx, WOLFSSL_OP_NO_TLSv1);
        FALL_THROUGH;
    case TLS1_VERSION:
        wolfSSL_CTX_set_options(ctx, WOLFSSL_OP_NO_TLSv1_1);
        FALL_THROUGH;
    case TLS1_1_VERSION:
        wolfSSL_CTX_set_options(ctx, WOLFSSL_OP_NO_TLSv1_2);
        FALL_THROUGH;
    case TLS1_2_VERSION:
        wolfSSL_CTX_set_options(ctx, WOLFSSL_OP_NO_TLSv1_3);
        FALL_THROUGH;
    case TLS1_3_VERSION:
        /* Nothing to do here */
        break;
#endif
#ifdef WOLFSSL_DTLS
    case DTLS1_VERSION:
    case DTLS1_2_VERSION:
        break;
#endif
    default:
        WOLFSSL_MSG("Unrecognized protocol version or not compiled in");
        return WOLFSSL_FAILURE;
    }

    return CheckSslMethodVersion(ctx->method->version.major, ctx->mask);
}

static int GetMinProtoVersion(int minDowngrade)
{
    int ret;

    switch (minDowngrade) {
#ifndef NO_OLD_TLS
    #ifdef WOLFSSL_ALLOW_SSLV3
        case SSLv3_MINOR:
            ret = SSL3_VERSION;
            break;
    #endif
    #ifdef WOLFSSL_ALLOW_TLSV10
        case TLSv1_MINOR:
            ret = TLS1_VERSION;
            break;
    #endif
        case TLSv1_1_MINOR:
            ret = TLS1_1_VERSION;
            break;
#endif
#ifndef WOLFSSL_NO_TLS12
        case TLSv1_2_MINOR:
            ret = TLS1_2_VERSION;
            break;
#endif
#ifdef WOLFSSL_TLS13
        case TLSv1_3_MINOR:
            ret = TLS1_3_VERSION;
            break;
#endif
        default:
            ret = 0;
            break;
    }

    return ret;
}

WOLFSSL_API int wolfSSL_CTX_get_min_proto_version(WOLFSSL_CTX* ctx)
{
    int ret = 0;

    WOLFSSL_ENTER("wolfSSL_CTX_get_min_proto_version");

    if (ctx != NULL) {
        ret = GetMinProtoVersion(ctx->minDowngrade);
    }
    if (ret == 0) {
        ret = GetMinProtoVersion(WOLFSSL_MIN_DOWNGRADE);
    }

    WOLFSSL_LEAVE("wolfSSL_CTX_get_min_proto_version", ret);

    return ret;
}

#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL) || \
    defined(HAVE_SECRET_CALLBACK)
#if !defined(NO_WOLFSSL_CLIENT)
/* Return the amount of random bytes copied over or error case.
 * ssl : ssl struct after handshake
 * out : buffer to hold random bytes
 * outSz : either 0 (return max buffer sz) or size of out buffer
 *
 * NOTE: wolfSSL_KeepArrays(ssl) must be called to retain handshake information.
 */
size_t wolfSSL_get_client_random(const WOLFSSL* ssl, unsigned char* out,
                                                                   size_t outSz)
{
    size_t size;

    /* return max size of buffer */
    if (outSz == 0) {
        return RAN_LEN;
    }

    if (ssl == NULL || out == NULL) {
        return 0;
    }

    if (ssl->options.saveArrays == 0 || ssl->arrays == NULL) {
        WOLFSSL_MSG("Arrays struct not saved after handshake");
        return 0;
    }

    if (outSz > RAN_LEN) {
        size = RAN_LEN;
    }
    else {
        size = outSz;
    }

    XMEMCPY(out, ssl->arrays->clientRandom, size);
    return size;
}
#endif /* !NO_WOLFSSL_CLIENT */
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL || HAVE_SECRET_CALLBACK */

#ifdef OPENSSL_EXTRA
    unsigned long wolfSSLeay(void)
    {
        return SSLEAY_VERSION_NUMBER;
    }

    unsigned long wolfSSL_OpenSSL_version_num(void)
    {
        return OPENSSL_VERSION_NUMBER;
    }

    const char* wolfSSLeay_version(int type)
    {
        static const char* version = "SSLeay wolfSSL compatibility";
        (void)type;
        return version;
    }


#ifndef NO_MD5
    int wolfSSL_MD5_Init(WOLFSSL_MD5_CTX* md5)
    {
        int ret;
        typedef char md5_test[sizeof(MD5_CTX) >= sizeof(wc_Md5) ? 1 : -1];
        (void)sizeof(md5_test);

        WOLFSSL_ENTER("MD5_Init");
        ret = wc_InitMd5((wc_Md5*)md5);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_MD5_Update(WOLFSSL_MD5_CTX* md5, const void* input,
                           unsigned long sz)
    {
        int ret;

        WOLFSSL_ENTER("wolfSSL_MD5_Update");
        ret = wc_Md5Update((wc_Md5*)md5, (const byte*)input, (word32)sz);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_MD5_Final(byte* input, WOLFSSL_MD5_CTX* md5)
    {
        int ret;

        WOLFSSL_ENTER("MD5_Final");
        ret = wc_Md5Final((wc_Md5*)md5, input);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }
    /* Apply MD5 transformation to the data */
    int wolfSSL_MD5_Transform(WOLFSSL_MD5_CTX* md5, const unsigned char* data)
    {
        int ret;

       WOLFSSL_ENTER("MD5_Transform");
       
       /* sanity check */
       if (md5 == NULL || data == NULL) {
            return 0;
       }
       #if defined(BIG_ENDIAN_ORDER)
       {
            ByteReverseWords((word32*)data, (word32*)data, WC_MD5_BLOCK_SIZE);
       }
       #endif
    
       ret = wc_Md5Transform((wc_Md5*)md5, data);

       /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;
        else
            return 0;
    }
#endif /* !NO_MD5 */


#ifndef NO_SHA
    int wolfSSL_SHA_Init(WOLFSSL_SHA_CTX* sha)
    {
        int ret;

        typedef char sha_test[sizeof(SHA_CTX) >= sizeof(wc_Sha) ? 1 : -1];
        (void)sizeof(sha_test);

        WOLFSSL_ENTER("SHA_Init");
        ret = wc_InitSha((wc_Sha*)sha);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA_Update(WOLFSSL_SHA_CTX* sha, const void* input,
                           unsigned long sz)
    {
        int ret;

        WOLFSSL_ENTER("SHA_Update");
        ret = wc_ShaUpdate((wc_Sha*)sha, (const byte*)input, (word32)sz);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA_Final(byte* input, WOLFSSL_SHA_CTX* sha)
    {
        int ret;

        WOLFSSL_ENTER("SHA_Final");
        ret = wc_ShaFinal((wc_Sha*)sha, input);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }

    #if defined(OPENSSL_EXTRA) 
    #if !defined(HAVE_SELFTEST) && (!defined(HAVE_FIPS) || \
        (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION > 2)))
    /* Apply SHA1 transformation to the data */
    int wolfSSL_SHA_Transform(WOLFSSL_SHA_CTX* sha, 
                                         const unsigned char* data)
    {
       int ret;
       
       WOLFSSL_ENTER("SHA_Transform");
       /* sanity check */
       if (sha == NULL || data == NULL) {
            return 0;
       }
       #if defined(LITTLE_ENDIAN_ORDER)
       {
            ByteReverseWords((word32*)data, (word32*)data, WC_SHA_BLOCK_SIZE);
       }
       #endif
       ret = wc_ShaTransform((wc_Sha*)sha, data);

       /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;
        else
            return 0;
    }
    #endif
    #endif
    
    int wolfSSL_SHA1_Init(WOLFSSL_SHA_CTX* sha)
    {
        WOLFSSL_ENTER("SHA1_Init");
        return SHA_Init(sha);
    }


    int wolfSSL_SHA1_Update(WOLFSSL_SHA_CTX* sha, const void* input,
                            unsigned long sz)
    {
        WOLFSSL_ENTER("SHA1_Update");
        return SHA_Update(sha, input, sz);
    }


    int wolfSSL_SHA1_Final(byte* input, WOLFSSL_SHA_CTX* sha)
    {
        WOLFSSL_ENTER("SHA1_Final");
        return SHA_Final(input, sha);
    }
    #if defined(OPENSSL_EXTRA)
    #if !defined(HAVE_SELFTEST) && (!defined(HAVE_FIPS) || \
        (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION > 2)))
    /* Apply SHA1 transformation to the data */
    int wolfSSL_SHA1_Transform(WOLFSSL_SHA_CTX* sha, 
                                         const unsigned char* data)
    {
       WOLFSSL_ENTER("SHA1_Transform");
       return (wolfSSL_SHA_Transform(sha, data));
    }
    #endif
    #endif
#endif /* !NO_SHA */

#ifdef WOLFSSL_SHA224

    int wolfSSL_SHA224_Init(WOLFSSL_SHA224_CTX* sha)
    {
        int ret;

        typedef char sha_test[sizeof(SHA224_CTX) >= sizeof(wc_Sha224) ? 1 : -1];
        (void)sizeof(sha_test);

        WOLFSSL_ENTER("SHA224_Init");
        ret = wc_InitSha224((wc_Sha224*)sha);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA224_Update(WOLFSSL_SHA224_CTX* sha, const void* input,
                           unsigned long sz)
    {
        int ret;

        WOLFSSL_ENTER("SHA224_Update");
        ret = wc_Sha224Update((wc_Sha224*)sha, (const byte*)input, (word32)sz);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA224_Final(byte* input, WOLFSSL_SHA224_CTX* sha)
    {
        int ret;

        WOLFSSL_ENTER("SHA224_Final");
        ret = wc_Sha224Final((wc_Sha224*)sha, input);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }

#endif /* WOLFSSL_SHA224 */


    int wolfSSL_SHA256_Init(WOLFSSL_SHA256_CTX* sha256)
    {
        int ret;

        typedef char sha_test[sizeof(SHA256_CTX) >= sizeof(wc_Sha256) ? 1 : -1];
        (void)sizeof(sha_test);

        WOLFSSL_ENTER("SHA256_Init");
        ret = wc_InitSha256((wc_Sha256*)sha256);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA256_Update(WOLFSSL_SHA256_CTX* sha, const void* input,
                              unsigned long sz)
    {
        int ret;

        WOLFSSL_ENTER("SHA256_Update");
        ret = wc_Sha256Update((wc_Sha256*)sha, (const byte*)input, (word32)sz);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA256_Final(byte* input, WOLFSSL_SHA256_CTX* sha)
    {
        int ret;

        WOLFSSL_ENTER("SHA256_Final");
        ret = wc_Sha256Final((wc_Sha256*)sha, input);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }
    
    #if defined(OPENSSL_EXTRA)
    #if !defined(HAVE_SELFTEST) && (!defined(HAVE_FIPS) || \
        (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION > 2)))
    /* Apply SHA256 transformation to the data */
    int wolfSSL_SHA256_Transform(WOLFSSL_SHA256_CTX* sha256, 
                                                const unsigned char* data)
    {
       int ret;
       
       WOLFSSL_ENTER("SHA256_Transform");
       /* sanity check */
       if (sha256 == NULL || data == NULL) {
            return 0;
       }
       #if defined(LITTLE_ENDIAN_ORDER)
       {
            ByteReverseWords((word32*)data, (word32*)data, WC_SHA256_BLOCK_SIZE);
       }
       #endif
       ret = wc_Sha256Transform((wc_Sha256*)sha256, data);

       /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;
        else
            return 0;
    }
    #endif
    #endif
    
#ifdef WOLFSSL_SHA384

    int wolfSSL_SHA384_Init(WOLFSSL_SHA384_CTX* sha)
    {
        int ret;

        typedef char sha_test[sizeof(SHA384_CTX) >= sizeof(wc_Sha384) ? 1 : -1];
        (void)sizeof(sha_test);

        WOLFSSL_ENTER("SHA384_Init");
        ret = wc_InitSha384((wc_Sha384*)sha);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA384_Update(WOLFSSL_SHA384_CTX* sha, const void* input,
                           unsigned long sz)
    {
        int ret;

        WOLFSSL_ENTER("SHA384_Update");
        ret = wc_Sha384Update((wc_Sha384*)sha, (const byte*)input, (word32)sz);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA384_Final(byte* input, WOLFSSL_SHA384_CTX* sha)
    {
        int ret;

        WOLFSSL_ENTER("SHA384_Final");
        ret = wc_Sha384Final((wc_Sha384*)sha, input);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }

#endif /* WOLFSSL_SHA384 */


#ifdef WOLFSSL_SHA512

    int wolfSSL_SHA512_Init(WOLFSSL_SHA512_CTX* sha)
    {
        int ret;

        typedef char sha_test[sizeof(SHA512_CTX) >= sizeof(wc_Sha512) ? 1 : -1];
        (void)sizeof(sha_test);

        WOLFSSL_ENTER("SHA512_Init");
        ret = wc_InitSha512((wc_Sha512*)sha);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA512_Update(WOLFSSL_SHA512_CTX* sha, const void* input,
                           unsigned long sz)
    {
        int ret;

        WOLFSSL_ENTER("SHA512_Update");
        ret = wc_Sha512Update((wc_Sha512*)sha, (const byte*)input, (word32)sz);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA512_Final(byte* input, WOLFSSL_SHA512_CTX* sha)
    {
        int ret;

        WOLFSSL_ENTER("SHA512_Final");
        ret = wc_Sha512Final((wc_Sha512*)sha, input);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }

    #if !defined(HAVE_SELFTEST) && (!defined(HAVE_FIPS) || \
        (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION > 2)))
    /* Apply SHA512 transformation to the data */
    int wolfSSL_SHA512_Transform(WOLFSSL_SHA512_CTX* sha512,
                                          const unsigned char* data)
    {
       int ret;

       WOLFSSL_ENTER("SHA512_Transform");
       /* sanity check */
       if (sha512 == NULL || data == NULL) {
            return WOLFSSL_FAILURE;
       }

       ret = wc_Sha512Transform((wc_Sha512*)sha512, data);

       /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return WOLFSSL_SUCCESS;
        else
            return WOLFSSL_FAILURE;
    }
    #endif /* !defined(HAVE_FIPS) || (defined(HAVE_FIPS_VERSION) && \
              (HAVE_FIPS_VERSION > 2)) */
#endif /* WOLFSSL_SHA512 */

#ifdef WOLFSSL_SHA3
#ifndef WOLFSSL_NOSHA3_224

    int wolfSSL_SHA3_224_Init(WOLFSSL_SHA3_224_CTX* sha)
    {
        int ret;

        typedef char sha_test[sizeof(SHA3_224_CTX) >= sizeof(wc_Sha3) ? 1 : -1];
        (void)sizeof(sha_test);

        WOLFSSL_ENTER("SHA3_224_Init");
        ret = wc_InitSha3_224((wc_Sha3*)sha, NULL, 0);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA3_224_Update(WOLFSSL_SHA3_224_CTX* sha, const void* input,
                           unsigned long sz)
    {
        int ret;

        WOLFSSL_ENTER("SHA3_224_Update");
        ret = wc_Sha3_224_Update((wc_Sha3*)sha, (const byte*)input, (word32)sz);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA3_224_Final(byte* input, WOLFSSL_SHA3_224_CTX* sha)
    {
        int ret;

        WOLFSSL_ENTER("SHA3_224_Final");
        ret = wc_Sha3_224_Final((wc_Sha3*)sha, input);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }

#endif /* WOLFSSL_NOSHA3_224 */


#ifndef WOLFSSL_NOSHA3_256
    int wolfSSL_SHA3_256_Init(WOLFSSL_SHA3_256_CTX* sha3_256)
    {
        int ret;

        typedef char sha_test[sizeof(SHA3_256_CTX) >= sizeof(wc_Sha3) ? 1 : -1];
        (void)sizeof(sha_test);

        WOLFSSL_ENTER("SHA3_256_Init");
        ret = wc_InitSha3_256((wc_Sha3*)sha3_256, NULL, INVALID_DEVID);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA3_256_Update(WOLFSSL_SHA3_256_CTX* sha, const void* input,
                              unsigned long sz)
    {
        int ret;

        WOLFSSL_ENTER("SHA3_256_Update");
        ret = wc_Sha3_256_Update((wc_Sha3*)sha, (const byte*)input, (word32)sz);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA3_256_Final(byte* input, WOLFSSL_SHA3_256_CTX* sha)
    {
        int ret;

        WOLFSSL_ENTER("SHA3_256_Final");
        ret = wc_Sha3_256_Final((wc_Sha3*)sha, input);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }
#endif /* WOLFSSL_NOSHA3_256 */


    int wolfSSL_SHA3_384_Init(WOLFSSL_SHA3_384_CTX* sha)
    {
        int ret;

        typedef char sha_test[sizeof(SHA3_384_CTX) >= sizeof(wc_Sha3) ? 1 : -1];
        (void)sizeof(sha_test);

        WOLFSSL_ENTER("SHA3_384_Init");
        ret = wc_InitSha3_384((wc_Sha3*)sha, NULL, 0);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA3_384_Update(WOLFSSL_SHA3_384_CTX* sha, const void* input,
                           unsigned long sz)
    {
        int ret;

        WOLFSSL_ENTER("SHA3_384_Update");
        ret = wc_Sha3_384_Update((wc_Sha3*)sha, (const byte*)input, (word32)sz);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA3_384_Final(byte* input, WOLFSSL_SHA3_384_CTX* sha)
    {
        int ret;

        WOLFSSL_ENTER("SHA3_384_Final");
        ret = wc_Sha3_384_Final((wc_Sha3*)sha, input);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }



#ifndef WOLFSSL_NOSHA3_512

    int wolfSSL_SHA3_512_Init(WOLFSSL_SHA3_512_CTX* sha)
    {
        int ret;

        typedef char sha_test[sizeof(SHA3_512_CTX) >= sizeof(wc_Sha3) ? 1 : -1];
        (void)sizeof(sha_test);

        WOLFSSL_ENTER("SHA3_512_Init");
        ret = wc_InitSha3_512((wc_Sha3*)sha, NULL, 0);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA3_512_Update(WOLFSSL_SHA3_512_CTX* sha, const void* input,
                           unsigned long sz)
    {
        int ret;

        WOLFSSL_ENTER("SHA3_512_Update");
        ret = wc_Sha3_512_Update((wc_Sha3*)sha, (const byte*)input, (word32)sz);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }


    int wolfSSL_SHA3_512_Final(byte* input, WOLFSSL_SHA3_512_CTX* sha)
    {
        int ret;

        WOLFSSL_ENTER("SHA3_512_Final");
        ret = wc_Sha3_512_Final((wc_Sha3*)sha, input);

        /* return 1 on success, 0 otherwise */
        if (ret == 0)
            return 1;

        return 0;
    }

#endif /* WOLFSSL_NOSHA3_512 */
#endif /* WOLFSSL_SHA3 */

    /* store for external read of iv, WOLFSSL_SUCCESS on success */
    int  wolfSSL_StoreExternalIV(WOLFSSL_EVP_CIPHER_CTX* ctx)
    {
        WOLFSSL_ENTER("wolfSSL_StoreExternalIV");

        if (ctx == NULL) {
            WOLFSSL_MSG("Bad function argument");
            return WOLFSSL_FATAL_ERROR;
        }

        switch (ctx->cipherType) {

#ifndef NO_AES
#ifdef HAVE_AES_CBC
            case AES_128_CBC_TYPE :
            case AES_192_CBC_TYPE :
            case AES_256_CBC_TYPE :
                WOLFSSL_MSG("AES CBC");
                XMEMCPY(ctx->iv, &ctx->cipher.aes.reg, AES_BLOCK_SIZE);
                break;
#endif
#ifdef HAVE_AESGCM
            case AES_128_GCM_TYPE :
            case AES_192_GCM_TYPE :
            case AES_256_GCM_TYPE :
                WOLFSSL_MSG("AES GCM");
                XMEMCPY(ctx->iv, &ctx->cipher.aes.reg, AES_BLOCK_SIZE);
                break;
#endif /* HAVE_AESGCM */
#ifdef HAVE_AES_ECB
            case AES_128_ECB_TYPE :
            case AES_192_ECB_TYPE :
            case AES_256_ECB_TYPE :
                WOLFSSL_MSG("AES ECB");
                break;
#endif
#ifdef WOLFSSL_AES_COUNTER
            case AES_128_CTR_TYPE :
            case AES_192_CTR_TYPE :
            case AES_256_CTR_TYPE :
                WOLFSSL_MSG("AES CTR");
                XMEMCPY(ctx->iv, &ctx->cipher.aes.reg, AES_BLOCK_SIZE);
                break;
#endif /* WOLFSSL_AES_COUNTER */
#ifdef WOLFSSL_AES_CFB
#if !defined(HAVE_SELFTEST) && !defined(HAVE_FIPS)
            case AES_128_CFB1_TYPE:
            case AES_192_CFB1_TYPE:
            case AES_256_CFB1_TYPE:
                WOLFSSL_MSG("AES CFB1");
                break;
            case AES_128_CFB8_TYPE:
            case AES_192_CFB8_TYPE:
            case AES_256_CFB8_TYPE:
                WOLFSSL_MSG("AES CFB8");
                break;
#endif /* !HAVE_SELFTEST && !HAVE_FIPS */
            case AES_128_CFB128_TYPE:
            case AES_192_CFB128_TYPE:
            case AES_256_CFB128_TYPE:
                WOLFSSL_MSG("AES CFB128");
                break;
#endif /* WOLFSSL_AES_CFB */
#if defined(WOLFSSL_AES_OFB)
            case AES_128_OFB_TYPE:
            case AES_192_OFB_TYPE:
            case AES_256_OFB_TYPE:
                WOLFSSL_MSG("AES OFB");
                break;
#endif /* WOLFSSL_AES_OFB */
#ifdef WOLFSSL_AES_XTS
            case AES_128_XTS_TYPE:
            case AES_256_XTS_TYPE:
                WOLFSSL_MSG("AES XTS");
                break;
#endif /* WOLFSSL_AES_XTS */
#endif /* NO_AES */

#ifndef NO_DES3
            case DES_CBC_TYPE :
                WOLFSSL_MSG("DES CBC");
                XMEMCPY(ctx->iv, &ctx->cipher.des.reg, DES_BLOCK_SIZE);
                break;

            case DES_EDE3_CBC_TYPE :
                WOLFSSL_MSG("DES EDE3 CBC");
                XMEMCPY(ctx->iv, &ctx->cipher.des3.reg, DES_BLOCK_SIZE);
                break;
#endif
#ifdef WOLFSSL_DES_ECB
            case DES_ECB_TYPE :
                WOLFSSL_MSG("DES ECB");
                break;
            case DES_EDE3_ECB_TYPE :
                WOLFSSL_MSG("DES3 ECB");
                break;
#endif

#ifdef HAVE_IDEA
            case IDEA_CBC_TYPE :
                WOLFSSL_MSG("IDEA CBC");
                XMEMCPY(ctx->iv, &ctx->cipher.idea.reg, IDEA_BLOCK_SIZE);
                break;
#endif
            case ARC4_TYPE :
                WOLFSSL_MSG("ARC4");
                break;

            case NULL_CIPHER_TYPE :
                WOLFSSL_MSG("NULL");
                break;

            default: {
                WOLFSSL_MSG("bad type");
                return WOLFSSL_FATAL_ERROR;
            }
        }
        return WOLFSSL_SUCCESS;
    }

    /* set internal IV from external, WOLFSSL_SUCCESS on success */
    int  wolfSSL_SetInternalIV(WOLFSSL_EVP_CIPHER_CTX* ctx)
    {

        WOLFSSL_ENTER("wolfSSL_SetInternalIV");

        if (ctx == NULL) {
            WOLFSSL_MSG("Bad function argument");
            return WOLFSSL_FATAL_ERROR;
        }

        switch (ctx->cipherType) {

#ifndef NO_AES
#ifdef HAVE_AES_CBC
            case AES_128_CBC_TYPE :
            case AES_192_CBC_TYPE :
            case AES_256_CBC_TYPE :
                WOLFSSL_MSG("AES CBC");
                XMEMCPY(&ctx->cipher.aes.reg, ctx->iv, AES_BLOCK_SIZE);
                break;
#endif
#ifdef HAVE_AESGCM
            case AES_128_GCM_TYPE :
            case AES_192_GCM_TYPE :
            case AES_256_GCM_TYPE :
                WOLFSSL_MSG("AES GCM");
                XMEMCPY(&ctx->cipher.aes.reg, ctx->iv, AES_BLOCK_SIZE);
                break;
#endif
#ifdef HAVE_AES_ECB
            case AES_128_ECB_TYPE :
            case AES_192_ECB_TYPE :
            case AES_256_ECB_TYPE :
                WOLFSSL_MSG("AES ECB");
                break;
#endif
#ifdef WOLFSSL_AES_COUNTER
            case AES_128_CTR_TYPE :
            case AES_192_CTR_TYPE :
            case AES_256_CTR_TYPE :
                WOLFSSL_MSG("AES CTR");
                XMEMCPY(&ctx->cipher.aes.reg, ctx->iv, AES_BLOCK_SIZE);
                break;
#endif

#endif /* NO_AES */

#ifndef NO_DES3
            case DES_CBC_TYPE :
                WOLFSSL_MSG("DES CBC");
                XMEMCPY(&ctx->cipher.des.reg, ctx->iv, DES_BLOCK_SIZE);
                break;

            case DES_EDE3_CBC_TYPE :
                WOLFSSL_MSG("DES EDE3 CBC");
                XMEMCPY(&ctx->cipher.des3.reg, ctx->iv, DES_BLOCK_SIZE);
                break;
#endif
#ifdef WOLFSSL_DES_ECB
            case DES_ECB_TYPE :
                WOLFSSL_MSG("DES ECB");
                break;
            case DES_EDE3_ECB_TYPE :
                WOLFSSL_MSG("DES3 ECB");
                break;
#endif

#ifdef HAVE_IDEA
            case IDEA_CBC_TYPE :
                WOLFSSL_MSG("IDEA CBC");
                XMEMCPY(&ctx->cipher.idea.reg, ctx->iv, IDEA_BLOCK_SIZE);
                break;
#endif
            case ARC4_TYPE :
                WOLFSSL_MSG("ARC4");
                break;

            case NULL_CIPHER_TYPE :
                WOLFSSL_MSG("NULL");
                break;

            default: {
                WOLFSSL_MSG("bad type");
                return WOLFSSL_FATAL_ERROR;
            }
        }
        return WOLFSSL_SUCCESS;
    }

    unsigned char* wolfSSL_HMAC(const WOLFSSL_EVP_MD* evp_md, const void* key,
                                int key_len, const unsigned char* d, int n,
                                unsigned char* md, unsigned int* md_len)
    {
        int type;
        int mdlen;
        unsigned char* ret = NULL;
#ifdef WOLFSSL_SMALL_STACK
        Hmac* hmac = NULL;
#else
        Hmac  hmac[1];
#endif
        void* heap = NULL;

        WOLFSSL_ENTER("wolfSSL_HMAC");
        if (!md) {
            WOLFSSL_MSG("Static buffer not supported, pass in md buffer");
            return NULL;  /* no static buffer support */
        }

#ifndef NO_MD5
        if (XSTRNCMP(evp_md, "MD5", 3) == 0) {
            type = WC_MD5;
            mdlen = WC_MD5_DIGEST_SIZE;
        } else
#endif
#ifdef WOLFSSL_SHA224
        if (XSTRNCMP(evp_md, "SHA224", 6) == 0) {
            type = WC_SHA224;
            mdlen = WC_SHA224_DIGEST_SIZE;
        } else
#endif
#ifndef NO_SHA256
        if (XSTRNCMP(evp_md, "SHA256", 6) == 0) {
            type = WC_SHA256;
            mdlen = WC_SHA256_DIGEST_SIZE;
        } else
#endif
#ifdef WOLFSSL_SHA384
        if (XSTRNCMP(evp_md, "SHA384", 6) == 0) {
            type = WC_SHA384;
            mdlen = WC_SHA384_DIGEST_SIZE;
        } else
#endif
#ifdef WOLFSSL_SHA512
        if (XSTRNCMP(evp_md, "SHA512", 6) == 0) {
            type = WC_SHA512;
            mdlen = WC_SHA512_DIGEST_SIZE;
        } else
#endif
#ifdef WOLFSSL_SHA3
    #ifndef WOLFSSL_NOSHA3_224
        if (XSTRNCMP(evp_md, "SHA3_224", 8) == 0) {
            type = WC_SHA3_224;
            mdlen = WC_SHA3_224_DIGEST_SIZE;
        } else
    #endif
    #ifndef WOLFSSL_NOSHA3_256
        if (XSTRNCMP(evp_md, "SHA3_256", 8) == 0) {
            type = WC_SHA3_256;
            mdlen = WC_SHA3_256_DIGEST_SIZE;
        } else
    #endif
        if (XSTRNCMP(evp_md, "SHA3_384", 8) == 0) {
            type = WC_SHA3_384;
            mdlen = WC_SHA3_384_DIGEST_SIZE;
        } else
    #ifndef WOLFSSL_NOSHA3_512
        if (XSTRNCMP(evp_md, "SHA3_512", 8) == 0) {
            type = WC_SHA3_512;
            mdlen = WC_SHA3_512_DIGEST_SIZE;
        } else
    #endif
#endif
#ifndef NO_SHA
        if (XSTRNCMP(evp_md, "SHA", 3) == 0) {
            type = WC_SHA;
            mdlen = WC_SHA_DIGEST_SIZE;
        } else
#endif
        {
            return NULL;
        }

    #ifdef WOLFSSL_SMALL_STACK
        hmac = (Hmac*)XMALLOC(sizeof(Hmac), heap, DYNAMIC_TYPE_HMAC);
        if (hmac == NULL)
            return NULL;
    #endif

        if (wc_HmacInit(hmac, heap, INVALID_DEVID) == 0) {
            if (wc_HmacSetKey(hmac, type, (const byte*)key, key_len) == 0) {
                if (wc_HmacUpdate(hmac, d, n) == 0) {
                    if (wc_HmacFinal(hmac, md) == 0) {
                        if (md_len)
                            *md_len = mdlen;
                        ret = md;
                    }
                }
            }
            wc_HmacFree(hmac);
        }

    #ifdef WOLFSSL_SMALL_STACK
        XFREE(hmac, heap, DYNAMIC_TYPE_HMAC);
    #endif

        (void)evp_md;
        return ret;
    }

    void wolfSSL_ERR_clear_error(void)
    {
        WOLFSSL_ENTER("wolfSSL_ERR_clear_error");

#if defined(DEBUG_WOLFSSL) || defined(WOLFSSL_NGINX) || \
    defined(OPENSSL_EXTRA) || defined(DEBUG_WOLFSSL_VERBOSE)
        wc_ClearErrorNodes();
#endif
    }

    /* If a valid struct is provided with function pointers, will override
       RAND_seed, bytes, cleanup, add, pseudo_bytes and status.  If a NULL
       pointer is passed in, it will cancel any previous function overrides.

       Returns WOLFSSL_SUCCESS on success, WOLFSSL_FAILURE on failure. */
    int wolfSSL_RAND_set_rand_method(const WOLFSSL_RAND_METHOD *methods)
    {
    #ifndef WOLFSSL_NO_OPENSSL_RAND_CB
        if (wolfSSL_RAND_InitMutex() == 0 && wc_LockMutex(&gRandMethodMutex) == 0) {
            gRandMethods = methods;
            wc_UnLockMutex(&gRandMethodMutex);
            return WOLFSSL_SUCCESS;
        }
    #else
        (void)methods;
    #endif
        return WOLFSSL_FAILURE;
    }

    /* Returns WOLFSSL_SUCCESS if the RNG has been seeded with enough data */
    int wolfSSL_RAND_status(void)
    {
        int ret = WOLFSSL_SUCCESS;
    #ifndef WOLFSSL_NO_OPENSSL_RAND_CB
        if (wolfSSL_RAND_InitMutex() == 0 && wc_LockMutex(&gRandMethodMutex) == 0) {
            if (gRandMethods && gRandMethods->status)
                ret = gRandMethods->status();
            wc_UnLockMutex(&gRandMethodMutex);
        }
        else {
            ret = WOLFSSL_FAILURE;
        }
    #else
        /* wolfCrypt provides enough seed internally, so return success */
    #endif
        return ret;
    }

    void wolfSSL_RAND_add(const void* add, int len, double entropy)
    {
    #ifndef WOLFSSL_NO_OPENSSL_RAND_CB
        if (wolfSSL_RAND_InitMutex() == 0 && wc_LockMutex(&gRandMethodMutex) == 0) {
            if (gRandMethods && gRandMethods->add) {
                /* callback has return code, but RAND_add does not */
                (void)gRandMethods->add(add, len, entropy);
            }
            wc_UnLockMutex(&gRandMethodMutex);
        }
    #else
        /* wolfSSL seeds/adds internally, use explicit RNG if you want
           to take control */
        (void)add;
        (void)len;
        (void)entropy;
    #endif
    }

#ifndef NO_DES3
    /* 0 on ok */
    int wolfSSL_DES_key_sched(WOLFSSL_const_DES_cblock* key,
                              WOLFSSL_DES_key_schedule* schedule)
    {
        WOLFSSL_ENTER("wolfSSL_DES_key_sched");

        if (key == NULL || schedule == NULL) {
            WOLFSSL_MSG("Null argument passed in");
        }
        else {
            XMEMCPY(schedule, key, sizeof(WOLFSSL_const_DES_cblock));
        }

        return 0;
    }


    /* intended to behave similar to Kerberos mit_des_cbc_cksum
     * return the last 4 bytes of cipher text */
    WOLFSSL_DES_LONG wolfSSL_DES_cbc_cksum(const unsigned char* in,
            WOLFSSL_DES_cblock* out, long length, WOLFSSL_DES_key_schedule* sc,
            WOLFSSL_const_DES_cblock* iv)
    {
        WOLFSSL_DES_LONG ret;
        unsigned char* tmp;
        unsigned char* data   = (unsigned char*)in;
        long           dataSz = length;
        byte dynamicFlag = 0; /* when padding the buffer created needs free'd */

        WOLFSSL_ENTER("wolfSSL_DES_cbc_cksum");

        if (in == NULL || out == NULL || sc == NULL || iv == NULL) {
            WOLFSSL_MSG("Bad argument passed in");
            return 0;
        }

        /* if input length is not a multiple of DES_BLOCK_SIZE pad with 0s */
        if (dataSz % DES_BLOCK_SIZE) {
            dataSz += DES_BLOCK_SIZE - (dataSz % DES_BLOCK_SIZE);
            data = (unsigned char*)XMALLOC(dataSz, NULL,
                                           DYNAMIC_TYPE_TMP_BUFFER);
            if (data == NULL) {
                WOLFSSL_MSG("Issue creating temporary buffer");
                return 0;
            }
            dynamicFlag = 1; /* set to free buffer at end */
            XMEMCPY(data, in, length);
            XMEMSET(data + length, 0, dataSz - length); /* padding */
        }

        tmp = (unsigned char*)XMALLOC(dataSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        if (tmp == NULL) {
            WOLFSSL_MSG("Issue creating temporary buffer");
            if (dynamicFlag == 1) {
                XFREE(data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            }
            return 0;
        }

        wolfSSL_DES_cbc_encrypt(data, tmp, dataSz, sc,
                (WOLFSSL_DES_cblock*)iv, 1);
        XMEMCPY((unsigned char*)out, tmp + (dataSz - DES_BLOCK_SIZE),
                DES_BLOCK_SIZE);

        ret = (((*((unsigned char*)out + 4) & 0xFF) << 24)|
               ((*((unsigned char*)out + 5) & 0xFF) << 16)|
               ((*((unsigned char*)out + 6) & 0xFF) << 8) |
               (*((unsigned char*)out + 7) & 0xFF));

        XFREE(tmp, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        if (dynamicFlag == 1) {
            XFREE(data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        }

        return ret;
    }


    void wolfSSL_DES_cbc_encrypt(const unsigned char* input,
                                 unsigned char* output, long length,
                                 WOLFSSL_DES_key_schedule* schedule,
                                 WOLFSSL_DES_cblock* ivec, int enc)
    {
        Des myDes;
        byte lastblock[DES_BLOCK_SIZE];
        int  lb_sz;
        long  blk;

        WOLFSSL_ENTER("DES_cbc_encrypt");

        /* OpenSSL compat, no ret */
        wc_Des_SetKey(&myDes, (const byte*)schedule, (const byte*)ivec, !enc);
        lb_sz = length%DES_BLOCK_SIZE;
        blk   = length/DES_BLOCK_SIZE;

        if (enc){
            wc_Des_CbcEncrypt(&myDes, output, input, (word32)blk*DES_BLOCK_SIZE);
            if(lb_sz){
                XMEMSET(lastblock, 0, DES_BLOCK_SIZE);
                XMEMCPY(lastblock, input+length-lb_sz, lb_sz);
                wc_Des_CbcEncrypt(&myDes, output+blk*DES_BLOCK_SIZE,
                    lastblock, (word32)DES_BLOCK_SIZE);
            }
        }
        else {
            wc_Des_CbcDecrypt(&myDes, output, input, (word32)blk*DES_BLOCK_SIZE);
            if(lb_sz){
                wc_Des_CbcDecrypt(&myDes, lastblock, input+length-lb_sz, (word32)DES_BLOCK_SIZE);
                XMEMCPY(output+length-lb_sz, lastblock, lb_sz);
            }
        }
    }


    /* WOLFSSL_DES_key_schedule is a unsigned char array of size 8 */
    void wolfSSL_DES_ede3_cbc_encrypt(const unsigned char* input,
                                      unsigned char* output, long sz,
                                      WOLFSSL_DES_key_schedule* ks1,
                                      WOLFSSL_DES_key_schedule* ks2,
                                      WOLFSSL_DES_key_schedule* ks3,
                                      WOLFSSL_DES_cblock* ivec, int enc)
    {
        int ret;
        Des3 des;
        byte key[24];/* EDE uses 24 size key */
        byte lastblock[DES_BLOCK_SIZE];
        int  lb_sz;
        long  blk;

        WOLFSSL_ENTER("wolfSSL_DES_ede3_cbc_encrypt");

        XMEMSET(key, 0, sizeof(key));
        XMEMCPY(key, *ks1, DES_BLOCK_SIZE);
        XMEMCPY(&key[DES_BLOCK_SIZE], *ks2, DES_BLOCK_SIZE);
        XMEMCPY(&key[DES_BLOCK_SIZE * 2], *ks3, DES_BLOCK_SIZE);
        lb_sz = sz%DES_BLOCK_SIZE;
        blk   = sz/DES_BLOCK_SIZE;

        /* OpenSSL compat, no ret */
        (void)wc_Des3Init(&des, NULL, INVALID_DEVID);

        if (enc) {
            wc_Des3_SetKey(&des, key, (const byte*)ivec, DES_ENCRYPTION);
            ret = wc_Des3_CbcEncrypt(&des, output, input, (word32)blk*DES_BLOCK_SIZE);
        #if defined(WOLFSSL_ASYNC_CRYPT)
            ret = wc_AsyncWait(ret, &des.asyncDev, WC_ASYNC_FLAG_NONE);
        #endif
            (void)ret; /* ignore return codes for processing */
            if(lb_sz){
                XMEMSET(lastblock, 0, DES_BLOCK_SIZE);
                XMEMCPY(lastblock, input+sz-lb_sz, lb_sz);
                ret = wc_Des3_CbcEncrypt(&des, output+blk*DES_BLOCK_SIZE,
                    lastblock, (word32)DES_BLOCK_SIZE);
            #if defined(WOLFSSL_ASYNC_CRYPT)
                ret = wc_AsyncWait(ret, &des.asyncDev, WC_ASYNC_FLAG_NONE);
            #endif
                (void)ret; /* ignore return codes for processing */
            }
        }
        else {
            wc_Des3_SetKey(&des, key, (const byte*)ivec, DES_DECRYPTION);
            ret = wc_Des3_CbcDecrypt(&des, output, input, (word32)blk*DES_BLOCK_SIZE);
        #if defined(WOLFSSL_ASYNC_CRYPT)
            ret = wc_AsyncWait(ret, &des.asyncDev, WC_ASYNC_FLAG_NONE);
        #endif
            (void)ret; /* ignore return codes for processing */
            if(lb_sz){
                ret = wc_Des3_CbcDecrypt(&des, lastblock, input+sz-lb_sz, (word32)DES_BLOCK_SIZE);
            #if defined(WOLFSSL_ASYNC_CRYPT)
                ret = wc_AsyncWait(ret, &des.asyncDev, WC_ASYNC_FLAG_NONE);
            #endif
                (void)ret; /* ignore return codes for processing */
                XMEMCPY(output+sz-lb_sz, lastblock, lb_sz);
            }
        }
        wc_Des3Free(&des);
    }


    /* correctly sets ivec for next call */
    void wolfSSL_DES_ncbc_encrypt(const unsigned char* input,
                     unsigned char* output, long length,
                     WOLFSSL_DES_key_schedule* schedule, WOLFSSL_DES_cblock* ivec,
                     int enc)
    {
        Des myDes;
        byte lastblock[DES_BLOCK_SIZE];
        int  lb_sz;
        long idx = length;
        long blk;

        WOLFSSL_ENTER("DES_ncbc_encrypt");

        /* OpenSSL compat, no ret */
        if (wc_Des_SetKey(&myDes, (const byte*)schedule,
                         (const byte*)ivec, !enc) != 0) {
            WOLFSSL_MSG("wc_Des_SetKey return error.");
            return;
        }

        lb_sz = length%DES_BLOCK_SIZE;
        blk   = length/DES_BLOCK_SIZE;
        idx  -= sizeof(DES_cblock);
        if (lb_sz) {
            idx += DES_BLOCK_SIZE - lb_sz;
        }
        if (enc){
            wc_Des_CbcEncrypt(&myDes, output, input,
                    (word32)blk * DES_BLOCK_SIZE);
            if (lb_sz){
                XMEMSET(lastblock, 0, DES_BLOCK_SIZE);
                XMEMCPY(lastblock, input+length-lb_sz, lb_sz);
                wc_Des_CbcEncrypt(&myDes, output + blk * DES_BLOCK_SIZE,
                    lastblock, (word32)DES_BLOCK_SIZE);
            }
            XMEMCPY(ivec, output + idx, sizeof(DES_cblock));
        } else {
            WOLFSSL_DES_cblock tmp;
            XMEMCPY(tmp, input + idx, sizeof(DES_cblock));
            wc_Des_CbcDecrypt(&myDes, output, input,
                    (word32)blk * DES_BLOCK_SIZE);
            if (lb_sz){
                wc_Des_CbcDecrypt(&myDes, lastblock, input + length - lb_sz,
                        (word32)DES_BLOCK_SIZE);
                XMEMCPY(output+length-lb_sz, lastblock, lb_sz);
            }
            XMEMCPY(ivec, tmp, sizeof(WOLFSSL_DES_cblock));
        }

    }

#endif /* NO_DES3 */

    void wolfSSL_ERR_free_strings(void)
    {
        /* handled internally */
    }

    void wolfSSL_cleanup_all_ex_data(void)
    {
        /* nothing to do here */
    }

#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
    int wolfSSL_clear(WOLFSSL* ssl)
    {
        if (ssl == NULL) {
            return WOLFSSL_FAILURE;
        }

        ssl->options.isClosed = 0;
        ssl->options.connReset = 0;
        ssl->options.sentNotify = 0;
        ssl->options.sendVerify = 0;
        ssl->options.serverState = NULL_STATE;
        ssl->options.clientState = NULL_STATE;
        ssl->options.connectState = CONNECT_BEGIN;
        ssl->options.acceptState  = ACCEPT_BEGIN;
        ssl->options.handShakeState  = NULL_STATE;
        ssl->options.handShakeDone = 0;
        ssl->options.processReply = 0; /* doProcessInit */

        ssl->keys.encryptionOn = 0;
        XMEMSET(&ssl->msgsReceived, 0, sizeof(ssl->msgsReceived));

        if (ssl->hsHashes != NULL) {
#ifndef NO_OLD_TLS
#ifndef NO_MD5
            if (wc_InitMd5_ex(&ssl->hsHashes->hashMd5, ssl->heap,
                    ssl->devId) != 0) {
                return WOLFSSL_FAILURE;
            }
        #if defined(WOLFSSL_HASH_FLAGS) || defined(WOLF_CRYPTO_CB)
            wc_Md5SetFlags(&ssl->hsHashes->hashMd5, WC_HASH_FLAG_WILLCOPY);
        #endif
#endif
#ifndef NO_SHA
            if (wc_InitSha_ex(&ssl->hsHashes->hashSha, ssl->heap,
                    ssl->devId) != 0) {
                return WOLFSSL_FAILURE;
            }
        #if defined(WOLFSSL_HASH_FLAGS) || defined(WOLF_CRYPTO_CB)
            wc_ShaSetFlags(&ssl->hsHashes->hashSha, WC_HASH_FLAG_WILLCOPY);
        #endif
#endif
#endif
#ifndef NO_SHA256
            if (wc_InitSha256_ex(&ssl->hsHashes->hashSha256, ssl->heap,
                    ssl->devId) != 0) {
                return WOLFSSL_FAILURE;
            }
        #if defined(WOLFSSL_HASH_FLAGS) || defined(WOLF_CRYPTO_CB)
            wc_Sha256SetFlags(&ssl->hsHashes->hashSha256, WC_HASH_FLAG_WILLCOPY);
        #endif
#endif
#ifdef WOLFSSL_SHA384
            if (wc_InitSha384_ex(&ssl->hsHashes->hashSha384, ssl->heap,
                    ssl->devId) != 0) {
                return WOLFSSL_FAILURE;
            }
        #if defined(WOLFSSL_HASH_FLAGS) || defined(WOLF_CRYPTO_CB)
            wc_Sha384SetFlags(&ssl->hsHashes->hashSha384, WC_HASH_FLAG_WILLCOPY);
        #endif
#endif
#ifdef WOLFSSL_SHA512
            if (wc_InitSha512_ex(&ssl->hsHashes->hashSha512, ssl->heap,
                    ssl->devId) != 0) {
                return WOLFSSL_FAILURE;
            }
        #if defined(WOLFSSL_HASH_FLAGS) || defined(WOLF_CRYPTO_CB)
            wc_Sha512SetFlags(&ssl->hsHashes->hashSha512, WC_HASH_FLAG_WILLCOPY);
        #endif
#endif
        }
#ifdef SESSION_CERTS
        ssl->session.chain.count = 0;
#endif
#ifdef KEEP_PEER_CERT
        FreeX509(&ssl->peerCert);
        InitX509(&ssl->peerCert, 0, ssl->heap);
#endif

        return WOLFSSL_SUCCESS;
    }

#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#if defined(OPENSSL_EXTRA) || defined(HAVE_WEBSERVER)
    long wolfSSL_CTX_set_mode(WOLFSSL_CTX* ctx, long mode)
    {
        /* WOLFSSL_MODE_ACCEPT_MOVING_WRITE_BUFFER is wolfSSL default mode */

        WOLFSSL_ENTER("SSL_CTX_set_mode");
        switch(mode) {
            case SSL_MODE_ENABLE_PARTIAL_WRITE:
                ctx->partialWrite = 1;
                break;
            #if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
            case SSL_MODE_RELEASE_BUFFERS:
                WOLFSSL_MSG("SSL_MODE_RELEASE_BUFFERS not implemented.");
                break;
            #endif
            default:
                WOLFSSL_MSG("Mode Not Implemented");
        }

        /* SSL_MODE_AUTO_RETRY
         * Should not return -1 with renegotiation on read/write */

        return mode;
    }
#endif

#ifdef OPENSSL_EXTRA

    #ifndef NO_WOLFSSL_STUB
    long wolfSSL_SSL_get_mode(WOLFSSL* ssl)
    {
        /* TODO: */
        (void)ssl;
        WOLFSSL_STUB("SSL_get_mode");
        return 0;
    }
    #endif

    #ifndef NO_WOLFSSL_STUB
    long wolfSSL_CTX_get_mode(WOLFSSL_CTX* ctx)
    {
        /* TODO: */
        (void)ctx;
        WOLFSSL_STUB("SSL_CTX_get_mode");
        return 0;
    }
    #endif

    #ifndef NO_WOLFSSL_STUB
    void wolfSSL_CTX_set_default_read_ahead(WOLFSSL_CTX* ctx, int m)
    {
        /* TODO: maybe? */
        (void)ctx;
        (void)m;
        WOLFSSL_STUB("SSL_CTX_set_default_read_ahead");
    }
    #endif


    /* Storing app session context id, this value is inherited by WOLFSSL
     * objects created from WOLFSSL_CTX. Any session that is imported with a
     * different session context id will be rejected.
     *
     * ctx         structure to set context in
     * sid_ctx     value of context to set
     * sid_ctx_len length of sid_ctx buffer
     *
     * Returns WOLFSSL_SUCCESS in success case and SSL_FAILURE when failing
     */
    int wolfSSL_CTX_set_session_id_context(WOLFSSL_CTX* ctx,
                                           const unsigned char* sid_ctx,
                                           unsigned int sid_ctx_len)
    {
        WOLFSSL_ENTER("SSL_CTX_set_session_id_context");

        /* No application specific context needed for wolfSSL */
        if (sid_ctx_len > ID_LEN || ctx == NULL || sid_ctx == NULL) {
            return SSL_FAILURE;
        }
        XMEMCPY(ctx->sessionCtx, sid_ctx, sid_ctx_len);
        ctx->sessionCtxSz = (byte)sid_ctx_len;

        return WOLFSSL_SUCCESS;
    }



    /* Storing app session context id. Any session that is imported with a
     * different session context id will be rejected.
     *
     * ssl  structure to set context in
     * id   value of context to set
     * len  length of sid_ctx buffer
     *
     * Returns WOLFSSL_SUCCESS in success case and SSL_FAILURE when failing
     */
    int wolfSSL_set_session_id_context(WOLFSSL* ssl, const unsigned char* id,
                                   unsigned int len)
    {
        WOLFSSL_ENTER("wolfSSL_set_session_id_context");

        if (len > ID_LEN || ssl == NULL || id == NULL) {
            return SSL_FAILURE;
        }
        XMEMCPY(ssl->sessionCtx, id, len);
        ssl->sessionCtxSz = (byte)len;

        return WOLFSSL_SUCCESS;
    }


    long wolfSSL_CTX_sess_get_cache_size(WOLFSSL_CTX* ctx)
    {
        (void)ctx;
        #ifndef NO_SESSION_CACHE
            return (long)(SESSIONS_PER_ROW * SESSION_ROWS);
        #else
            return 0;
        #endif
    }


    /* returns the unsigned error value and increments the pointer into the
     * error queue.
     *
     * file  pointer to file name
     * line  gets set to line number of error when not NULL
     */
    unsigned long wolfSSL_ERR_get_error_line(const char** file, int* line)
    {
    #ifdef DEBUG_WOLFSSL
        int ret = wc_PullErrorNode(file, NULL, line);
        if (ret < 0) {
            if (ret == BAD_STATE_E) return 0; /* no errors in queue */
            WOLFSSL_MSG("Issue getting error node");
            WOLFSSL_LEAVE("wolfSSL_ERR_get_error_line", ret);
            ret = 0 - ret; /* return absolute value of error */

            /* panic and try to clear out nodes */
            wc_ClearErrorNodes();
        }
        return (unsigned long)ret;
    #else
        (void)file;
        (void)line;

        return 0;
    #endif
    }


#if (defined(DEBUG_WOLFSSL) || defined(OPENSSL_EXTRA)) && \
    (!defined(_WIN32) && !defined(NO_ERROR_QUEUE))
    static const char WOLFSSL_SYS_ACCEPT_T[]  = "accept";
    static const char WOLFSSL_SYS_BIND_T[]    = "bind";
    static const char WOLFSSL_SYS_CONNECT_T[] = "connect";
    static const char WOLFSSL_SYS_FOPEN_T[]   = "fopen";
    static const char WOLFSSL_SYS_FREAD_T[]   = "fread";
    static const char WOLFSSL_SYS_GETADDRINFO_T[] = "getaddrinfo";
    static const char WOLFSSL_SYS_GETSOCKOPT_T[]  = "getsockopt";
    static const char WOLFSSL_SYS_GETSOCKNAME_T[] = "getsockname";
    static const char WOLFSSL_SYS_GETHOSTBYNAME_T[] = "gethostbyname";
    static const char WOLFSSL_SYS_GETNAMEINFO_T[]   = "getnameinfo";
    static const char WOLFSSL_SYS_GETSERVBYNAME_T[] = "getservbyname";
    static const char WOLFSSL_SYS_IOCTLSOCKET_T[]   = "ioctlsocket";
    static const char WOLFSSL_SYS_LISTEN_T[]        = "listen";
    static const char WOLFSSL_SYS_OPENDIR_T[]       = "opendir";
    static const char WOLFSSL_SYS_SETSOCKOPT_T[]    = "setsockopt";
    static const char WOLFSSL_SYS_SOCKET_T[]        = "socket";

    /* switch with int mapped to function name for compatibility */
    static const char* wolfSSL_ERR_sys_func(int fun)
    {
        switch (fun) {
            case WOLFSSL_SYS_ACCEPT:      return WOLFSSL_SYS_ACCEPT_T;
            case WOLFSSL_SYS_BIND:        return WOLFSSL_SYS_BIND_T;
            case WOLFSSL_SYS_CONNECT:     return WOLFSSL_SYS_CONNECT_T;
            case WOLFSSL_SYS_FOPEN:       return WOLFSSL_SYS_FOPEN_T;
            case WOLFSSL_SYS_FREAD:       return WOLFSSL_SYS_FREAD_T;
            case WOLFSSL_SYS_GETADDRINFO: return WOLFSSL_SYS_GETADDRINFO_T;
            case WOLFSSL_SYS_GETSOCKOPT:  return WOLFSSL_SYS_GETSOCKOPT_T;
            case WOLFSSL_SYS_GETSOCKNAME: return WOLFSSL_SYS_GETSOCKNAME_T;
            case WOLFSSL_SYS_GETHOSTBYNAME: return WOLFSSL_SYS_GETHOSTBYNAME_T;
            case WOLFSSL_SYS_GETNAMEINFO: return WOLFSSL_SYS_GETNAMEINFO_T;
            case WOLFSSL_SYS_GETSERVBYNAME: return WOLFSSL_SYS_GETSERVBYNAME_T;
            case WOLFSSL_SYS_IOCTLSOCKET: return WOLFSSL_SYS_IOCTLSOCKET_T;
            case WOLFSSL_SYS_LISTEN:      return WOLFSSL_SYS_LISTEN_T;
            case WOLFSSL_SYS_OPENDIR:     return WOLFSSL_SYS_OPENDIR_T;
            case WOLFSSL_SYS_SETSOCKOPT:  return WOLFSSL_SYS_SETSOCKOPT_T;
            case WOLFSSL_SYS_SOCKET:      return WOLFSSL_SYS_SOCKET_T;
            default:
                return "NULL";
        }
    }
#endif /* DEBUG_WOLFSSL */


    /* @TODO when having an error queue this needs to push to the queue */
    void wolfSSL_ERR_put_error(int lib, int fun, int err, const char* file,
            int line)
    {
        WOLFSSL_ENTER("wolfSSL_ERR_put_error");

        #if !defined(DEBUG_WOLFSSL) && !defined(OPENSSL_EXTRA)
        (void)fun;
        (void)err;
        (void)file;
        (void)line;
        WOLFSSL_MSG("Not compiled in debug mode");
        #elif defined(OPENSSL_EXTRA) && \
                (defined(_WIN32) || defined(NO_ERROR_QUEUE))
        (void)fun;
        (void)file;
        (void)line;
        WOLFSSL_ERROR(err);
        #else
        WOLFSSL_ERROR_LINE(err, wolfSSL_ERR_sys_func(fun), (unsigned int)line,
            file, NULL);
        #endif
        (void)lib;
    }


    /* Similar to wolfSSL_ERR_get_error_line but takes in a flags argument for
     * more flexibility.
     *
     * file  output pointer to file where error happened
     * line  output to line number of error
     * data  output data. Is a string if ERR_TXT_STRING flag is used
     * flags bit flag to adjust data output
     *
     * Returns the error value or 0 if no errors are in the queue
     */
    unsigned long wolfSSL_ERR_get_error_line_data(const char** file, int* line,
                                                  const char** data, int *flags)
    {
        int ret;

        WOLFSSL_STUB("wolfSSL_ERR_get_error_line_data");

        if (flags != NULL) {
            if ((*flags & ERR_TXT_STRING) == ERR_TXT_STRING) {
                ret = wc_PullErrorNode(file, data, line);
                if (ret < 0) {
                    if (ret == BAD_STATE_E) return 0; /* no errors in queue */
                    WOLFSSL_MSG("Error with pulling error node!");
                    WOLFSSL_LEAVE("wolfSSL_ERR_get_error_line_data", ret);
                    ret = 0 - ret; /* return absolute value of error */

                    /* panic and try to clear out nodes */
                    wc_ClearErrorNodes();
                }

                return (unsigned long)ret;
            }
        }

        ret = wc_PullErrorNode(file, NULL, line);
        if (ret < 0) {
            if (ret == BAD_STATE_E) return 0; /* no errors in queue */
            WOLFSSL_MSG("Error with pulling error node!");
            WOLFSSL_LEAVE("wolfSSL_ERR_get_error_line_data", ret);
            ret = 0 - ret; /* return absolute value of error */

            /* panic and try to clear out nodes */
            wc_ClearErrorNodes();
        }

        return (unsigned long)ret;
    }

#endif /* OPENSSL_EXTRA */


#if (defined(KEEP_PEER_CERT) && defined(SESSION_CERTS)) || \
                                   (defined(OPENSSL_ALL) && defined(HAVE_PKCS7))
    /* Decode the X509 DER encoded certificate into a WOLFSSL_X509 object.
     *
     * x509  WOLFSSL_X509 object to decode into.
     * in    X509 DER data.
     * len   Length of the X509 DER data.
     * returns the new certificate on success, otherwise NULL.
     */
    static int DecodeToX509(WOLFSSL_X509* x509, const byte* in, int len)
    {
        int          ret;
    #ifdef WOLFSSL_SMALL_STACK
        DecodedCert* cert;
    #else
        DecodedCert  cert[1];
    #endif
        if (x509 == NULL || in == NULL || len <= 0)
            return BAD_FUNC_ARG;

    #ifdef WOLFSSL_SMALL_STACK
        cert = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL,
                                     DYNAMIC_TYPE_DCERT);
        if (cert == NULL)
            return MEMORY_E;
    #endif

        /* Create a DecodedCert object and copy fields into WOLFSSL_X509 object.
         */
        InitDecodedCert(cert, (byte*)in, len, NULL);
        if ((ret = ParseCertRelative(cert, CERT_TYPE, 0, NULL)) == 0) {
        /* Check if x509 was not previously initialized by wolfSSL_X509_new() */
            if (x509->dynamicMemory != TRUE)
                InitX509(x509, 0, NULL);
            ret = CopyDecodedToX509(x509, cert);
            FreeDecodedCert(cert);
        }
    #ifdef WOLFSSL_SMALL_STACK
        XFREE(cert, NULL, DYNAMIC_TYPE_DCERT);
    #endif

        return ret;
    }
#endif /* (KEEP_PEER_CERT && SESSION_CERTS) || (OPENSSL_ALL && HAVE_PKCS7) */


#ifdef KEEP_PEER_CERT
    WOLFSSL_ABI
    WOLFSSL_X509* wolfSSL_get_peer_certificate(WOLFSSL* ssl)
    {
        WOLFSSL_ENTER("SSL_get_peer_certificate");
        if (ssl == NULL)
            return NULL;

        if (ssl->peerCert.issuer.sz)
            return &ssl->peerCert;
#ifdef SESSION_CERTS
        else if (ssl->session.chain.count > 0) {
            if (DecodeToX509(&ssl->peerCert, ssl->session.chain.certs[0].buffer,
                    ssl->session.chain.certs[0].length) == 0) {
                return &ssl->peerCert;
            }
        }
#endif
        return 0;
    }

#endif /* KEEP_PEER_CERT */

#if defined(SESSION_CERTS) && defined(OPENSSL_EXTRA)
/* Return stack of peer certs.
 * Caller does not need to free return. The stack is Free'd when WOLFSSL* ssl is.
 */
WOLF_STACK_OF(WOLFSSL_X509)* wolfSSL_get_peer_cert_chain(const WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_get_peer_cert_chain");

    if (ssl == NULL)
        return NULL;

    if (ssl->peerCertChain == NULL)
        wolfSSL_set_peer_cert_chain((WOLFSSL*) ssl);
    return ssl->peerCertChain;
}

static int x509GetIssuerFromCM(WOLFSSL_X509 **issuer, WOLFSSL_CERT_MANAGER* cm,
        WOLFSSL_X509 *x);
/**
 * Recursively push the issuer CA chain onto the stack
 * @param cm The cert manager that is queried for the issuer
 * @param x  This cert's issuer will be queried in cm
 * @param sk The issuer is pushed onto this stack
 * @return WOLFSSL_SUCCESS on success
 *         WOLFSSL_FAILURE on no issuer found
 *         WOLFSSL_FATAL_ERROR on a fatal error
 */
static int pushCAx509Chain(WOLFSSL_CERT_MANAGER* cm,
        WOLFSSL_X509 *x, WOLFSSL_STACK* sk)
{
    WOLFSSL_X509* issuer[MAX_CHAIN_DEPTH];
    int i;
    int push = 1;
    int ret = WOLFSSL_SUCCESS;

    for (i = 0; i < MAX_CHAIN_DEPTH; i++) {
        if (x509GetIssuerFromCM(&issuer[i], cm, x)
                != WOLFSSL_SUCCESS)
            break;
        x = issuer[i];
    }
    if (i == 0) /* No further chain found */
        return WOLFSSL_FAILURE;
    i--;
    for (; i >= 0; i--) {
        if (push) {
            if (wolfSSL_sk_X509_push(sk, issuer[i]) != WOLFSSL_SUCCESS) {
                wolfSSL_X509_free(issuer[i]);
                ret = WOLFSSL_FATAL_ERROR;
                push = 0; /* Free the rest of the unpushed certs */
            }
        }
        else {
            wolfSSL_X509_free(issuer[i]);
        }
    }
    return ret;
}

/* Builds up and creates a stack of peer certificates for ssl->peerCertChain
    based off of the ssl session chain. Attempts to place CA certificates
    at the bottom of the stack. Returns stack of WOLFSSL_X509 certs or
    NULL on failure */
WOLF_STACK_OF(WOLFSSL_X509)* wolfSSL_set_peer_cert_chain(WOLFSSL* ssl)
{
    WOLFSSL_STACK* sk;
    WOLFSSL_X509* x509;
    int i = 0;
    int ret;

    WOLFSSL_ENTER("wolfSSL_set_peer_cert_chain");
    if ((ssl == NULL) || (ssl->session.chain.count == 0))
        return NULL;

    sk = wolfSSL_sk_X509_new();
    i = ssl->session.chain.count-1;
    for (; i >= 0; i--) {
        x509 = wolfSSL_X509_new();
        if (x509 == NULL) {
            WOLFSSL_MSG("Error Creating X509");
            wolfSSL_sk_X509_free(sk);
            return NULL;
        }
        ret = DecodeToX509(x509, ssl->session.chain.certs[i].buffer,
                             ssl->session.chain.certs[i].length);
#if !defined(WOLFSSL_QT)
        if (ret == 0 && i == ssl->session.chain.count-1) {
            /* On the last element in the chain try to add the CA chain
             * first if we have one for this cert */
            if (pushCAx509Chain(ssl->ctx->cm, x509, sk)
                    == WOLFSSL_FATAL_ERROR) {
                ret = WOLFSSL_FATAL_ERROR;
            }
        }
#else
        (void)pushCAx509Chain;
#endif

        if (ret != 0 || wolfSSL_sk_X509_push(sk, x509) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Error decoding cert");
            wolfSSL_X509_free(x509);
            wolfSSL_sk_X509_free(sk);
            return NULL;
        }
    }

    if (sk == NULL) {
        WOLFSSL_MSG("Null session chain");
    }
#if defined(OPENSSL_ALL)
    else if (ssl->options.side == WOLFSSL_SERVER_END) {
        /* to be compliant with openssl 
           first element is kept as peer cert on server side.*/
        wolfSSL_sk_X509_shift(sk);
    }
#endif
    /* This is Free'd when ssl is Free'd */
    ssl->peerCertChain = sk;
    return sk;
}
#endif /* SESSION_CERTS && OPENSSL_EXTRA */

#ifndef NO_CERTS
#if defined(KEEP_PEER_CERT) || defined(SESSION_CERTS) || \
    defined(OPENSSL_EXTRA)  || defined(OPENSSL_EXTRA_X509_SMALL)

/* user externally called free X509, if dynamic go ahead with free, otherwise
 * don't */
static void ExternalFreeX509(WOLFSSL_X509* x509)
{
#if defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)
    int doFree = 0;
#endif

    WOLFSSL_ENTER("ExternalFreeX509");
    if (x509) {
#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
        wolfSSL_CRYPTO_cleanup_ex_data(&x509->ex_data);
#endif
        if (x509->dynamicMemory) {
        #if defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)
            if (wc_LockMutex(&x509->refMutex) != 0) {
                WOLFSSL_MSG("Couldn't lock x509 mutex");
            }
            /* only free if all references to it are done */
            x509->refCount--;
            if (x509->refCount == 0)
                doFree = 1;
            wc_UnLockMutex(&x509->refMutex);
        #endif /* OPENSSL_EXTRA || OPENSSL_ALL */

        #if defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)
            if (doFree)
        #endif /* OPENSSL_EXTRA || OPENSSL_ALL */
            {
                FreeX509(x509);
                XFREE(x509, x509->heap, DYNAMIC_TYPE_X509);
            }
        } else {
            WOLFSSL_MSG("free called on non dynamic object, not freeing");
        }
    }
}

/* Frees an external WOLFSSL_X509 structure */
WOLFSSL_ABI
void wolfSSL_X509_free(WOLFSSL_X509* x509)
{
    WOLFSSL_ENTER("wolfSSL_FreeX509");
    ExternalFreeX509(x509);
}


/* copy name into in buffer, at most sz bytes, if buffer is null will
   malloc buffer, call responsible for freeing                     */
WOLFSSL_ABI
char* wolfSSL_X509_NAME_oneline(WOLFSSL_X509_NAME* name, char* in, int sz)
{
    int copySz;

    if (name == NULL) {
        WOLFSSL_MSG("WOLFSSL_X509_NAME pointer was NULL");
        return NULL;
    }

    copySz = min(sz, name->sz);

    WOLFSSL_ENTER("wolfSSL_X509_NAME_oneline");
    if (!name->sz) return in;

    if (!in) {
    #ifdef WOLFSSL_STATIC_MEMORY
        WOLFSSL_MSG("Using static memory -- please pass in a buffer");
        return NULL;
    #else
        in = (char*)XMALLOC(name->sz, NULL, DYNAMIC_TYPE_OPENSSL);
        if (!in ) return in;
        copySz = name->sz;
    #endif
    }

    if (copySz <= 0)
        return in;

    XMEMCPY(in, name->name, copySz - 1);
    in[copySz - 1] = 0;

    return in;
}

#if defined(OPENSSL_EXTRA) && defined(XSNPRINTF)
/* Copies X509 subject name into a buffer, with comma-separated name entries
 *   (matching OpenSSL v1.0.0 format)
 * Example Output for Issuer:
 *
 * C=US, ST=Montana, L=Bozeman, O=Sawtooth, OU=Consulting,
 *  CN=www.wolfssl.com, emailAddress=info@wolfssl.com
 */
char* wolfSSL_X509_get_name_oneline(WOLFSSL_X509_NAME* name, char* in, int sz)
{
    WOLFSSL_X509_NAME_ENTRY* entry;
    int nameSz, strSz, count, i, idx = 0;
    int totalSz = 0;
    char *str;
    char tmpBuf[256];
    char buf[80];
    const char* sn;
    WOLFSSL_ENTER("wolfSSL_X509_get_name_oneline");

    if (name == NULL) {
        WOLFSSL_MSG("wolfSSL_X509_get_subject_name failed");
        return NULL;
    }
    #ifdef WOLFSSL_STATIC_MEMORY
    if (!in) {
        WOLFSSL_MSG("Using static memory -- please pass in a buffer");
        return NULL;
    }
    #endif

    tmpBuf[0] = '\0'; /* Make sure tmpBuf is NULL terminated */
    /* Loop through X509 name entries and copy new format to buffer */
    count = wolfSSL_X509_NAME_entry_count(name);
    for (i = 0; i < count; i++) {

        /* Get name entry and size */
        entry = wolfSSL_X509_NAME_get_entry(name, i);
        if (entry == NULL) {
            WOLFSSL_MSG("wolfSSL_X509_NAME_get_entry failed");
            return NULL;
        }
        nameSz = wolfSSL_X509_NAME_get_text_by_NID(name, entry->nid, buf,
                                                                   sizeof(buf));
        if (nameSz < 0) {
            WOLFSSL_MSG("wolfSSL_X509_NAME_get_text_by_NID failed");
            return NULL;
        }

        /* Get short name */
        sn = wolfSSL_OBJ_nid2sn(entry->nid);
        if (sn == NULL) {
            WOLFSSL_MSG("OBJ_nid2sn failed");
            return NULL;
        }

        /* Copy sn and name text to buffer
         * Add extra strSz for '=', ',', ' ' and '\0' characters in XSNPRINTF.
         */
        if (i != count - 1) {
            strSz = (int)XSTRLEN(sn) + nameSz + 4;
            totalSz+= strSz;
            str = (char*)XMALLOC(strSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            if (str == NULL) {
                WOLFSSL_MSG("Memory error");
                return NULL;
            }
            XSNPRINTF(str, strSz, "%s=%s, ", sn, buf);
        }
        else {
            /* Copy last name entry
            * Add extra strSz for '=' and '\0' characters in XSNPRINTF.
            */
            strSz = (int)XSTRLEN(sn) + nameSz + 2;
            totalSz+= strSz;
            str = (char*)XMALLOC(strSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            if (str == NULL) {
                WOLFSSL_MSG("Memory error");
                return NULL;
            }
            XSNPRINTF(str, strSz, "%s=%s", sn, buf);
        }
        /* Copy string to tmpBuf */
        XSTRNCAT(tmpBuf, str, strSz);
        idx += strSz;
        XFREE(str, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    }

    /* Allocate space based on total string size if no buffer was provided */
    if (!in) {
        in = (char*)XMALLOC(totalSz+1, NULL, DYNAMIC_TYPE_OPENSSL);
        if (in == NULL) {
            WOLFSSL_MSG("Memory error");
            return in;
        }
    }
    else {
        if (totalSz > sz) {
            WOLFSSL_MSG("Memory error");
            return NULL;
        }
    }

    XMEMCPY(in, tmpBuf, totalSz);
    in[totalSz] = '\0';

    return in;
}
#endif


/* Wraps wolfSSL_X509_d2i
 *
 * returns a WOLFSSL_X509 structure pointer on success and NULL on fail
 */
WOLFSSL_X509* wolfSSL_d2i_X509(WOLFSSL_X509** x509, const unsigned char** in,
        int len)
{
    WOLFSSL_X509* newX509 = NULL;
    WOLFSSL_ENTER("wolfSSL_d2i_X509");

    if (in == NULL) {
        WOLFSSL_MSG("NULL input for wolfSSL_d2i_X509");
        return NULL;
    }

    newX509 = wolfSSL_X509_d2i(x509, *in, len);
    if (newX509 != NULL) {
        *in += newX509->derCert->length;
    }
    return newX509;
}

static WOLFSSL_X509* d2i_X509orX509REQ(WOLFSSL_X509** x509,
                                        const byte* in, int len, int req)
{
    WOLFSSL_X509 *newX509 = NULL;
    int type = req ? CERTREQ_TYPE : CERT_TYPE;

    WOLFSSL_ENTER("wolfSSL_X509_d2i");

    if (in != NULL && len != 0
    #ifndef WOLFSSL_CERT_REQ
            && req == 0
    #else
            && (req == 0 || req == 1)
    #endif
            ) {
    #ifdef WOLFSSL_SMALL_STACK
        DecodedCert* cert;
    #else
        DecodedCert  cert[1];
    #endif

    #ifdef WOLFSSL_SMALL_STACK
        cert = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL,
                                     DYNAMIC_TYPE_DCERT);
        if (cert == NULL)
            return NULL;
    #endif

        InitDecodedCert(cert, (byte*)in, len, NULL);
    #ifdef WOLFSSL_CERT_REQ
        cert->isCSR = req;
    #endif
        if (ParseCertRelative(cert, type, 0, NULL) == 0) {
            newX509 = wolfSSL_X509_new();
            if (newX509 != NULL) {
                if (CopyDecodedToX509(newX509, cert) != 0) {
                    wolfSSL_X509_free(newX509);
                    newX509 = NULL;
                }
            }
        }
        FreeDecodedCert(cert);
    #ifdef WOLFSSL_SMALL_STACK
        XFREE(cert, NULL, DYNAMIC_TYPE_DCERT);
    #endif
    }

    if (x509 != NULL)
        *x509 = newX509;

    return newX509;
}

int wolfSSL_X509_get_isCA(WOLFSSL_X509* x509)
{
    int isCA = 0;

    WOLFSSL_ENTER("wolfSSL_X509_get_isCA");

    if (x509 != NULL)
        isCA = x509->isCa;

    WOLFSSL_LEAVE("wolfSSL_X509_get_isCA", isCA);

    return isCA;
}

WOLFSSL_X509* wolfSSL_X509_d2i(WOLFSSL_X509** x509, const byte* in, int len)
{
    return d2i_X509orX509REQ(x509, in, len, 0);
}

#ifdef WOLFSSL_CERT_REQ
WOLFSSL_X509* wolfSSL_X509_REQ_d2i(WOLFSSL_X509** x509,
        const unsigned char* in, int len)
{
    return d2i_X509orX509REQ(x509, in, len, 1);
}
#endif
#endif /* KEEP_PEER_CERT || SESSION_CERTS || OPENSSL_EXTRA ||
          OPENSSL_EXTRA_X509_SMALL */

#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
/* returns the number of entries in the WOLFSSL_X509_NAME */
int wolfSSL_X509_NAME_entry_count(WOLFSSL_X509_NAME* name)
{
    int count = 0;

    WOLFSSL_ENTER("wolfSSL_X509_NAME_entry_count");

    if (name != NULL)
        count = name->entrySz;

    WOLFSSL_LEAVE("wolfSSL_X509_NAME_entry_count", count);
    return count;
}
#endif /* OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL */

#if defined(OPENSSL_EXTRA) || \
    defined(KEEP_OUR_CERT) || defined(KEEP_PEER_CERT) || defined(SESSION_CERTS)

/* return the next, if any, altname from the peer cert */
WOLFSSL_ABI
char* wolfSSL_X509_get_next_altname(WOLFSSL_X509* cert)
{
    char* ret = NULL;
    WOLFSSL_ENTER("wolfSSL_X509_get_next_altname");

    /* don't have any to work with */
    if (cert == NULL || cert->altNames == NULL)
        return NULL;

    /* already went through them */
    if (cert->altNamesNext == NULL)
        return NULL;

    ret = cert->altNamesNext->name;
    cert->altNamesNext = cert->altNamesNext->next;

    return ret;
}

int wolfSSL_X509_get_signature(WOLFSSL_X509* x509,
                                                unsigned char* buf, int* bufSz)
{
    WOLFSSL_ENTER("wolfSSL_X509_get_signature");
    if (x509 == NULL || bufSz == NULL || (*bufSz < (int)x509->sig.length &&
                buf != NULL))
        return WOLFSSL_FATAL_ERROR;

    if (buf != NULL)
        XMEMCPY(buf, x509->sig.buffer, x509->sig.length);
    *bufSz = x509->sig.length;

    return WOLFSSL_SUCCESS;
}


/* Getter function that copies over the DER public key buffer to "buf" and
    * sets the size in bufSz. If "buf" is NULL then just bufSz is set to needed
    * buffer size. "bufSz" passed in should initially be set by the user to be
    * the size of "buf". This gets checked to make sure the buffer is large
    * enough to hold the public key.
    *
    * Note: this is the X.509 form of key with "header" info.
    * return WOLFSSL_SUCCESS on success
    */
int wolfSSL_X509_get_pubkey_buffer(WOLFSSL_X509* x509,
                                            unsigned char* buf, int* bufSz)
{
#ifdef WOLFSSL_SMALL_STACK
    DecodedCert* cert;
#else
    DecodedCert cert[1];
#endif
    word32 idx;
    const byte*  der;
    int length = 0;
    int    ret, derSz = 0;
    int badDate = 0;
    const byte* pubKeyX509 = NULL;
    int   pubKeyX509Sz = 0;

    WOLFSSL_ENTER("wolfSSL_X509_get_pubkey_buffer");
    if (x509 == NULL || bufSz == NULL) {
        WOLFSSL_LEAVE("wolfSSL_X509_get_pubkey_buffer", BAD_FUNC_ARG);
        return WOLFSSL_FATAL_ERROR;
    }


#ifdef WOLFSSL_SMALL_STACK
    cert = (DecodedCert*)XMALLOC(sizeof(DecodedCert),
                                    x509->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (cert == NULL) {
        WOLFSSL_LEAVE("wolfSSL_X509_get_pubkey_buffer", MEMORY_E);
        return WOLFSSL_FATAL_ERROR;
    }
#endif

    der = wolfSSL_X509_get_der(x509, &derSz);
    InitDecodedCert(cert, der, derSz, NULL);
    ret = wc_GetPubX509(cert, 0, &badDate);
    if (ret >= 0) {
        idx = cert->srcIdx;
        pubKeyX509 = cert->source + cert->srcIdx;
        ret = GetSequence(cert->source, &cert->srcIdx, &length,
                cert->maxIdx);
        pubKeyX509Sz = length + (cert->srcIdx - idx);
    }

    FreeDecodedCert(cert);
#ifdef WOLFSSL_SMALL_STACK
    XFREE(cert, x509->heap, DYNAMIC_TYPE_TMP_BUFFER);
#endif

    if (ret < 0) {
        WOLFSSL_LEAVE("wolfSSL_X509_get_pubkey_buffer", ret);
        return WOLFSSL_FATAL_ERROR;
    }

    if (buf != NULL) {
        if (pubKeyX509Sz > *bufSz) {
            WOLFSSL_LEAVE("wolfSSL_X509_get_pubkey_buffer", BUFFER_E);
            return WOLFSSL_FATAL_ERROR;
        }
        XMEMCPY(buf, pubKeyX509, pubKeyX509Sz);
    }
    *bufSz = pubKeyX509Sz;

    return WOLFSSL_SUCCESS;
}


/* Getter function for the public key OID value
    * return public key OID stored in WOLFSSL_X509 structure */
int wolfSSL_X509_get_pubkey_type(WOLFSSL_X509* x509)
{
    if (x509 == NULL)
        return WOLFSSL_FAILURE;
    return x509->pubKeyOID;
}

#endif /* OPENSSL_EXTRA || KEEP_OUR_CERT || KEEP_PEER_CERT || SESSION_CERTS */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL) || \
    defined(KEEP_OUR_CERT) || defined(KEEP_PEER_CERT) || defined(SESSION_CERTS)

/* write X509 serial number in unsigned binary to buffer
    buffer needs to be at least EXTERNAL_SERIAL_SIZE (32) for all cases
    return WOLFSSL_SUCCESS on success */
int wolfSSL_X509_get_serial_number(WOLFSSL_X509* x509,
                                    byte* in, int* inOutSz)
{
    WOLFSSL_ENTER("wolfSSL_X509_get_serial_number");
    if (x509 == NULL || inOutSz == NULL) {
        WOLFSSL_MSG("Null argument passed in");
        return BAD_FUNC_ARG;
    }

    if (in != NULL) {
        if (*inOutSz < x509->serialSz) {
            WOLFSSL_MSG("Serial buffer too small");
            return BUFFER_E;
        }
        XMEMCPY(in, x509->serial, x509->serialSz);
    }
    *inOutSz = x509->serialSz;

    return WOLFSSL_SUCCESS;
}

/* not an openssl compatibility function - getting for derCert */
const byte* wolfSSL_X509_get_der(WOLFSSL_X509* x509, int* outSz)
{
    WOLFSSL_ENTER("wolfSSL_X509_get_der");

    if (x509 == NULL || x509->derCert == NULL || outSz == NULL)
        return NULL;

    *outSz = (int)x509->derCert->length;
    return x509->derCert->buffer;
}

#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL || KEEP_OUR_CERT || KEEP_PEER_CERT || SESSION_CERTS */

#ifdef OPENSSL_EXTRA

/* used by JSSE (not a standard compatibility function) */
WOLFSSL_ABI
const byte* wolfSSL_X509_notBefore(WOLFSSL_X509* x509)
{
    WOLFSSL_ENTER("wolfSSL_X509_notBefore");

    if (x509 == NULL)
        return NULL;

    XMEMSET(x509->notBeforeData, 0, sizeof(x509->notBeforeData));
    x509->notBeforeData[0] = (byte)x509->notBefore.type;
    x509->notBeforeData[1] = (byte)x509->notBefore.length;
    XMEMCPY(&x509->notBeforeData[2], x509->notBefore.data, x509->notBefore.length);

    return x509->notBeforeData;
}

/* used by JSSE (not a standard compatibility function) */
WOLFSSL_ABI
const byte* wolfSSL_X509_notAfter(WOLFSSL_X509* x509)
{
    WOLFSSL_ENTER("wolfSSL_X509_notAfter");

    if (x509 == NULL)
        return NULL;

    XMEMSET(x509->notAfterData, 0, sizeof(x509->notAfterData));
    x509->notAfterData[0] = (byte)x509->notAfter.type;
    x509->notAfterData[1] = (byte)x509->notAfter.length;
    XMEMCPY(&x509->notAfterData[2], x509->notAfter.data, x509->notAfter.length);

    return x509->notAfterData;
}


#if defined(WOLFSSL_QT) || defined(OPENSSL_ALL) && !defined(NO_WOLFSSL_STUB)
WOLFSSL_ASN1_TIME* wolfSSL_X509_gmtime_adj(WOLFSSL_ASN1_TIME *s, long adj)
{
    (void) s;
    (void) adj;
    WOLFSSL_STUB("wolfSSL_X509_gmtime_adj");
    return NULL;
}
#endif

/* get the buffer to be signed (tbs) from the WOLFSSL_X509 certificate
    *
    * outSz : gets set to the size of the buffer
    * returns a pointer to the internal buffer at the location of TBS on
    *         on success and NULL on failure.
    */
const unsigned char* wolfSSL_X509_get_tbs(WOLFSSL_X509* x509, int* outSz)
{
    int sz = 0, len;
    unsigned int idx = 0, tmpIdx;
    const unsigned char* der = NULL;
    const unsigned char* tbs = NULL;

    if (x509 == NULL || outSz == NULL) {
        return NULL;
    }

    der = wolfSSL_X509_get_der(x509, &sz);
    if (der == NULL) {
        return NULL;
    }

    if (GetSequence(der, &idx, &len, sz) < 0) {
        return NULL;
    }
    tbs = der + idx;
    tmpIdx = idx;
    if (GetSequence(der, &idx, &len, sz) < 0) {
        return NULL;
    }
    *outSz = len + (idx - tmpIdx);
    return tbs;
}

int wolfSSL_X509_version(WOLFSSL_X509* x509)
{
    WOLFSSL_ENTER("wolfSSL_X509_version");

    if (x509 == NULL)
        return 0;

    return x509->version;
}

#ifdef WOLFSSL_SEP

/* copy oid into in buffer, at most *inOutSz bytes, if buffer is null will
   malloc buffer, call responsible for freeing. Actual size returned in
   *inOutSz. Requires inOutSz be non-null */
byte* wolfSSL_X509_get_device_type(WOLFSSL_X509* x509, byte* in, int *inOutSz)
{
    int copySz;

    WOLFSSL_ENTER("wolfSSL_X509_get_dev_type");
    if (inOutSz == NULL) return NULL;
    if (!x509->deviceTypeSz) return in;

    copySz = min(*inOutSz, x509->deviceTypeSz);

    if (!in) {
    #ifdef WOLFSSL_STATIC_MEMORY
        WOLFSSL_MSG("Using static memory -- please pass in a buffer");
        return NULL;
    #else
        in = (byte*)XMALLOC(x509->deviceTypeSz, 0, DYNAMIC_TYPE_OPENSSL);
        if (!in) return in;
        copySz = x509->deviceTypeSz;
    #endif
    }

    XMEMCPY(in, x509->deviceType, copySz);
    *inOutSz = copySz;

    return in;
}


byte* wolfSSL_X509_get_hw_type(WOLFSSL_X509* x509, byte* in, int* inOutSz)
{
    int copySz;

    WOLFSSL_ENTER("wolfSSL_X509_get_hw_type");
    if (inOutSz == NULL) return NULL;
    if (!x509->hwTypeSz) return in;

    copySz = min(*inOutSz, x509->hwTypeSz);

    if (!in) {
    #ifdef WOLFSSL_STATIC_MEMORY
        WOLFSSL_MSG("Using static memory -- please pass in a buffer");
        return NULL;
    #else
        in = (byte*)XMALLOC(x509->hwTypeSz, 0, DYNAMIC_TYPE_OPENSSL);
        if (!in) return in;
        copySz = x509->hwTypeSz;
    #endif
    }

    XMEMCPY(in, x509->hwType, copySz);
    *inOutSz = copySz;

    return in;
}


byte* wolfSSL_X509_get_hw_serial_number(WOLFSSL_X509* x509,byte* in,
                                        int* inOutSz)
{
    int copySz;

    WOLFSSL_ENTER("wolfSSL_X509_get_hw_serial_number");
    if (inOutSz == NULL) return NULL;
    if (!x509->hwTypeSz) return in;

    copySz = min(*inOutSz, x509->hwSerialNumSz);

    if (!in) {
    #ifdef WOLFSSL_STATIC_MEMORY
        WOLFSSL_MSG("Using static memory -- please pass in a buffer");
        return NULL;
    #else
        in = (byte*)XMALLOC(x509->hwSerialNumSz, 0, DYNAMIC_TYPE_OPENSSL);
        if (!in) return in;
        copySz = x509->hwSerialNumSz;
    #endif
    }

    XMEMCPY(in, x509->hwSerialNum, copySz);
    *inOutSz = copySz;

    return in;
}

#endif /* WOLFSSL_SEP */
#endif /* OPENSSL_EXTRA */

/* require OPENSSL_EXTRA since wolfSSL_X509_free is wrapped by OPENSSL_EXTRA */
#if !defined(NO_CERTS) && defined(OPENSSL_EXTRA)

WOLFSSL_ASN1_TIME* wolfSSL_X509_get_notBefore(const WOLFSSL_X509* x509)
{
    WOLFSSL_ENTER("wolfSSL_X509_get_notBefore");

    if (x509 == NULL)
        return NULL;

    return (WOLFSSL_ASN1_TIME*)&x509->notBefore;
}


WOLFSSL_ASN1_TIME* wolfSSL_X509_get_notAfter(const WOLFSSL_X509* x509)
{
    WOLFSSL_ENTER("wolfSSL_X509_get_notAfter");

    if (x509 == NULL)
        return NULL;

    return (WOLFSSL_ASN1_TIME*)&x509->notAfter;
}


/* return 1 on success 0 on fail */
int wolfSSL_sk_X509_push(WOLF_STACK_OF(WOLFSSL_X509_NAME)* sk, WOLFSSL_X509* x509)
{
    WOLFSSL_ENTER("wolfSSL_sk_X509_push");

    if (sk == NULL || x509 == NULL) {
        return WOLFSSL_FAILURE;
    }

    return wolfSSL_sk_push(sk, x509);
}


WOLFSSL_X509* wolfSSL_sk_X509_pop(WOLF_STACK_OF(WOLFSSL_X509_NAME)* sk) {
    WOLFSSL_STACK* node;
    WOLFSSL_X509*  x509;

    if (sk == NULL) {
        return NULL;
    }

    node = sk->next;
    x509 = sk->data.x509;

    if (node != NULL) { /* update sk and remove node from stack */
        sk->data.x509 = node->data.x509;
        sk->next = node->next;
        XFREE(node, NULL, DYNAMIC_TYPE_X509);
    }
    else { /* last x509 in stack */
        sk->data.x509 = NULL;
    }

    if (sk->num > 0) {
        sk->num -= 1;
    }

    return x509;
}

/* Getter function for WOLFSSL_X509 pointer
 *
 * sk is the stack to retrieve pointer from
 * i  is the index value in stack
 *
 * returns a pointer to a WOLFSSL_X509 structure on success and NULL on
 *         fail
 */
WOLFSSL_X509* wolfSSL_sk_X509_value(STACK_OF(WOLFSSL_X509)* sk, int i)
{
    WOLFSSL_ENTER("wolfSSL_sk_X509_value");

    for (; sk != NULL && i > 0; i--)
        sk = sk->next;

    if (i != 0 || sk == NULL)
        return NULL;
    return sk->data.x509;
}

WOLFSSL_X509* wolfSSL_sk_X509_shift(WOLF_STACK_OF(WOLFSSL_X509)* sk)
{
    return wolfSSL_sk_X509_pop(sk);
}

#ifndef NO_WOLFSSL_STUB
void* wolfSSL_sk_X509_OBJECT_value(WOLF_STACK_OF(WOLFSSL_X509_OBJECT)* sk, int x)
{
    (void) sk;
    (void) x;
    return NULL;
}
#endif

#endif /* !NO_CERTS && OPENSSL_EXTRA */

#if !defined(NO_CERTS) && (defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL))
/* Free's all nodes in X509 stack. This is different then wolfSSL_sk_X509_free
 * in that it allows for choosing the function to use when freeing an X509s.
 *
 * sk  stack to free nodes in
 * f   X509 free function
 */
void wolfSSL_sk_X509_pop_free(STACK_OF(WOLFSSL_X509)* sk,
    void (*f) (WOLFSSL_X509*))
{
    WOLFSSL_STACK* node;

    WOLFSSL_ENTER("wolfSSL_sk_X509_pop_free");

    if (sk == NULL) {
        return;
    }

    /* parse through stack freeing each node */
    node = sk->next;
    while (node && sk->num > 1) {
        WOLFSSL_STACK* tmp = node;
        node = node->next;

        if (f)
            f(tmp->data.x509);
        else
            wolfSSL_X509_free(tmp->data.x509);
        tmp->data.x509 = NULL;
        XFREE(tmp, NULL, DYNAMIC_TYPE_X509);
        sk->num -= 1;
    }

    /* free head of stack */
    if (sk->num == 1) {
        if (f)
            f(sk->data.x509);
        else
            wolfSSL_X509_free(sk->data.x509);
        sk->data.x509 = NULL;
    }
    XFREE(sk, NULL, DYNAMIC_TYPE_X509);
}


/* free structure for x509 stack */
void wolfSSL_sk_X509_free(WOLF_STACK_OF(WOLFSSL_X509)* sk)
{
    wolfSSL_sk_X509_pop_free(sk, NULL);
}

#endif /* !NO_CERTS && (OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL) */

#if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
/* return 1 on success 0 on fail */
int wolfSSL_sk_ACCESS_DESCRIPTION_push(WOLF_STACK_OF(ACCESS_DESCRIPTION)* sk,
                                              WOLFSSL_ACCESS_DESCRIPTION* access)
{
    WOLFSSL_ENTER("wolfSSL_sk_ACCESS_DESCRIPTION_push");

    return wolfSSL_sk_push(sk, access);
}

/* Frees all nodes in ACCESS_DESCRIPTION stack
*
* sk stack of nodes to free
* f  free function to use, not called with wolfSSL
*/
void wolfSSL_sk_ACCESS_DESCRIPTION_pop_free(WOLFSSL_STACK* sk,
    void (*f) (WOLFSSL_ACCESS_DESCRIPTION*))
{
   WOLFSSL_STACK* node;

   WOLFSSL_ENTER("wolfSSL_sk_ACCESS_DESCRIPTION_pop_free");

   if (sk == NULL) {
       return;
   }

   /* parse through stack freeing each node */
   node = sk->next;
   while (node && sk->num > 1) {
       WOLFSSL_STACK* tmp = node;
       node = node->next;

       if (f)
           f(tmp->data.access);
       else
           wolfSSL_ACCESS_DESCRIPTION_free(tmp->data.access);
       tmp->data.access = NULL;
       XFREE(tmp, NULL, DYNAMIC_TYPE_ASN1);
       sk->num -= 1;
   }

   /* free head of stack */
   if (sk->num == 1) {
        if (f)
            f(sk->data.access);
        else {
            if(sk->data.access->method) {

               wolfSSL_ASN1_OBJECT_free(sk->data.access->method);
            }
            if(sk->data.access->location) {
               wolfSSL_GENERAL_NAME_free(sk->data.access->location);
            }
        }
        sk->data.access = NULL;
   }
   XFREE(sk, NULL, DYNAMIC_TYPE_ASN1);
}

void wolfSSL_sk_ACCESS_DESCRIPTION_free(WOLFSSL_STACK* sk)
{
    wolfSSL_sk_ACCESS_DESCRIPTION_pop_free(sk, NULL);
}

void wolfSSL_ACCESS_DESCRIPTION_free(WOLFSSL_ACCESS_DESCRIPTION* access)
{
    WOLFSSL_ENTER("wolfSSL_ACCESS_DESCRIPTION_free");
    if (access == NULL)
        return;

    if (access->method)
        wolfSSL_ASN1_OBJECT_free(access->method);
    if (access->location)
        wolfSSL_GENERAL_NAME_free(access->location);

    /* access = NULL, don't try to access or double free it */
}
#endif /* OPENSSL_ALL || WOLFSSL_QT */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)

/* create a generic wolfSSL stack node
 * returns a new WOLFSSL_STACK structure on success */
WOLFSSL_STACK* wolfSSL_sk_new_node(void* heap)
{
    WOLFSSL_STACK* sk;
    WOLFSSL_ENTER("wolfSSL_sk_new_node");

    sk = (WOLFSSL_STACK*)XMALLOC(sizeof(WOLFSSL_STACK), heap,
                                                          DYNAMIC_TYPE_OPENSSL);
    if (sk != NULL) {
        XMEMSET(sk, 0, sizeof(*sk));
        sk->heap = heap;
    }

    return sk;
}

/* free's node but does not free internal data such as in->data.x509 */
void wolfSSL_sk_free_node(WOLFSSL_STACK* in)
{
    if (in != NULL) {
        XFREE(in, in->heap, DYNAMIC_TYPE_OPENSSL);
    }
}

/* pushes node "in" onto "stack" and returns pointer to the new stack on success
 * also handles internal "num" for number of nodes on stack
 * return WOLFSSL_SUCCESS on success
 */
int wolfSSL_sk_push_node(WOLFSSL_STACK** stack, WOLFSSL_STACK* in)
{
    if (stack == NULL || in == NULL) {
        return WOLFSSL_FAILURE;
    }

    if (*stack == NULL) {
        in->num = 1;
        *stack = in;
        return WOLFSSL_SUCCESS;
    }

    in->num  = (*stack)->num + 1;
    in->next = *stack;
    *stack   = in;
    return WOLFSSL_SUCCESS;
}

/* return 1 on success 0 on fail */
int wolfSSL_sk_push(WOLFSSL_STACK* sk, const void *data)
{
    WOLFSSL_STACK* node;
#if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
    WOLFSSL_CIPHER ciph;
#endif
    WOLFSSL_ENTER("wolfSSL_sk_push");

    if (!sk) {
        return WOLFSSL_FAILURE;
    }

    /* Check if empty data */
    switch (sk->type) {
#if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
        case STACK_TYPE_CIPHER:
            /* check if entire struct is zero */
            XMEMSET(&ciph, 0, sizeof(WOLFSSL_CIPHER));
            if (XMEMCMP(&sk->data.cipher, &ciph,
                    sizeof(WOLFSSL_CIPHER)) == 0) {
                sk->data.cipher = *(WOLFSSL_CIPHER*)data;
                sk->num = 1;
                if (sk->hash_fn) {
                    sk->hash = sk->hash_fn(&sk->data.cipher);
                }
                return WOLFSSL_SUCCESS;
            }
            break;
#endif
        default:
            /* All other types are pointers */
            if (!sk->data.generic) {
                sk->data.generic = (void*)data;
                sk->num = 1;
#ifdef OPENSSL_ALL
                if (sk->hash_fn) {
                    sk->hash = sk->hash_fn(sk->data.generic);
                }
#endif
                return WOLFSSL_SUCCESS;
            }
            break;
    }

    /* stack already has value(s) create a new node and add more */
    node = wolfSSL_sk_new_node(sk->heap);
    if (!node) {
        WOLFSSL_MSG("Memory error");
        return WOLFSSL_FAILURE;
    }

    /* push new x509 onto head of stack */
    node->next      = sk->next;
    node->type      = sk->type;
    sk->next        = node;
    sk->num        += 1;

#ifdef OPENSSL_ALL
    node->comp = sk->comp;
    node->hash_fn = sk->hash_fn;
    node->hash = sk->hash;
    sk->hash = 0;
#endif
    switch (sk->type) {
#if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
        case STACK_TYPE_CIPHER:
            node->data.cipher = sk->data.cipher;
            sk->data.cipher = *(WOLFSSL_CIPHER*)data;
            if (sk->hash_fn) {
                sk->hash = sk->hash_fn(&sk->data.cipher);
            }
            break;
#endif
        default:
            /* All other types are pointers */
            node->data.generic = sk->data.generic;
            sk->data.generic = (void*)data;
#ifdef OPENSSL_ALL
            if (sk->hash_fn) {
                sk->hash = sk->hash_fn(sk->data.generic);
            }
#endif
            break;
    }

    return WOLFSSL_SUCCESS;
}

/* Creates and returns new GENERAL_NAME structure */
WOLFSSL_GENERAL_NAME* wolfSSL_GENERAL_NAME_new(void)
{
    WOLFSSL_GENERAL_NAME* gn;
    WOLFSSL_ENTER("GENERAL_NAME_new");

    gn = (WOLFSSL_GENERAL_NAME*)XMALLOC(sizeof(WOLFSSL_GENERAL_NAME), NULL,
                                                             DYNAMIC_TYPE_ASN1);
    if (gn == NULL) {
        return NULL;
    }
    XMEMSET(gn, 0, sizeof(WOLFSSL_GENERAL_NAME));

    gn->d.ia5 = wolfSSL_ASN1_STRING_new();
    if (gn->d.ia5 == NULL) {
        WOLFSSL_MSG("Issue creating ASN1_STRING struct");
        wolfSSL_GENERAL_NAME_free(gn);
        return NULL;
    }
    return gn;
}

static WOLFSSL_GENERAL_NAME* wolfSSL_GENERAL_NAME_dup(WOLFSSL_GENERAL_NAME* gn)
{
    WOLFSSL_GENERAL_NAME* dupl = NULL;

    WOLFSSL_ENTER("wolfSSL_GENERAL_NAME_dup");

    if (!gn) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    if (!(dupl = wolfSSL_GENERAL_NAME_new())) {
        WOLFSSL_MSG("wolfSSL_GENERAL_NAME_new error");
        return NULL;
    }

    switch (gn->type) {
    /* WOLFSSL_ASN1_STRING types */
    case GEN_DNS:
        if (!(dupl->d.dNSName = wolfSSL_ASN1_STRING_dup(gn->d.dNSName))) {
            WOLFSSL_MSG("wolfSSL_ASN1_STRING_dup error");
            goto error;
        }
        break;
    case GEN_IPADD:
        if (!(dupl->d.iPAddress = wolfSSL_ASN1_STRING_dup(gn->d.iPAddress))) {
            WOLFSSL_MSG("wolfSSL_ASN1_STRING_dup error");
            goto error;
        }
        break;
    case GEN_EMAIL:
        if (!(dupl->d.rfc822Name = wolfSSL_ASN1_STRING_dup(gn->d.rfc822Name))) {
            WOLFSSL_MSG("wolfSSL_ASN1_STRING_dup error");
            goto error;
        }
        break;
    case GEN_URI:
        if (!(dupl->d.uniformResourceIdentifier =
                wolfSSL_ASN1_STRING_dup(gn->d.uniformResourceIdentifier))) {
            WOLFSSL_MSG("wolfSSL_ASN1_STRING_dup error");
            goto error;
        }
        break;
    case GEN_OTHERNAME:
    case GEN_X400:
    case GEN_DIRNAME:
    case GEN_EDIPARTY:
    case GEN_RID:
    default:
        WOLFSSL_MSG("Unrecognized or unsupported GENERAL_NAME type");
        goto error;
    }

    return dupl;
error:
    if (dupl) {
        wolfSSL_GENERAL_NAME_free(dupl);
    }
    return NULL;
}


/* return 1 on success 0 on fail */
int wolfSSL_sk_GENERAL_NAME_push(WOLFSSL_GENERAL_NAMES* sk,
                                 WOLFSSL_GENERAL_NAME* gn)
{
    WOLFSSL_STACK* node;
    WOLFSSL_ENTER("wolfSSL_sk_GENERAL_NAME_push");

    if (sk == NULL || gn == NULL) {
        return WOLFSSL_FAILURE;
    }

    /* no previous values in stack */
    if (sk->data.gn == NULL) {
        sk->data.gn = gn;
        sk->num += 1;

        return WOLFSSL_SUCCESS;
    }

    /* stack already has value(s) create a new node and add more */
    node = (WOLFSSL_STACK*)XMALLOC(sizeof(WOLFSSL_STACK), NULL,
                                                             DYNAMIC_TYPE_ASN1);
    if (node == NULL) {
        WOLFSSL_MSG("Memory error");
        return WOLFSSL_FAILURE;
    }
    XMEMSET(node, 0, sizeof(WOLFSSL_STACK));

    /* push new obj onto head of stack */
    node->data.gn = sk->data.gn;
    node->next    = sk->next;
    sk->next      = node;
    sk->data.gn   = gn;
    sk->num      += 1;

    return WOLFSSL_SUCCESS;
}

#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#ifdef OPENSSL_EXTRA

/* Returns the general name at index i from the stack
 *
 * sk  stack to get general name from
 * idx index to get
 *
 * return a pointer to the internal node of the stack
 */
WOLFSSL_GENERAL_NAME* wolfSSL_sk_GENERAL_NAME_value(WOLFSSL_STACK* sk, int idx)
{
    WOLFSSL_STACK* ret;

    if (sk == NULL) {
        return NULL;
    }

    ret = wolfSSL_sk_get_node(sk, idx);
    if (ret != NULL) {
        return ret->data.gn;
    }
    return NULL;
}

/* Gets the number of nodes in the stack
 *
 * sk  stack to get the number of nodes from
 *
 * returns the number of nodes, -1 if no nodes
 */
int wolfSSL_sk_GENERAL_NAME_num(WOLFSSL_STACK* sk)
{
    WOLFSSL_ENTER("wolfSSL_sk_GENERAL_NAME_num");

    if (sk == NULL) {
        return -1;
    }

    return (int)sk->num;
}

#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)

/* Frees all nodes in a GENERAL NAME stack
 *
 * sk stack of nodes to free
 * f  free function to use, not called with wolfSSL
 */
void wolfSSL_sk_GENERAL_NAME_pop_free(WOLFSSL_STACK* sk,
        void (*f) (WOLFSSL_GENERAL_NAME*))
{
    WOLFSSL_STACK* node;

    WOLFSSL_ENTER("wolfSSL_sk_GENERAL_NAME_pop_free");

    if (sk == NULL) {
        return;
    }

    /* parse through stack freeing each node */
    node = sk->next;
    while (node && sk->num > 1) {
        WOLFSSL_STACK* tmp = node;
        node = node->next;

        if (f)
            f(tmp->data.gn);
        else
            wolfSSL_GENERAL_NAME_free(tmp->data.gn);
        XFREE(tmp, NULL, DYNAMIC_TYPE_ASN1);
        sk->num -= 1;
    }

    /* free head of stack */
    if (sk->num == 1) {
        if (f)
            f(sk->data.gn);
        else
            wolfSSL_GENERAL_NAME_free(sk->data.gn);
    }
    XFREE(sk, NULL, DYNAMIC_TYPE_ASN1);
}

void wolfSSL_sk_GENERAL_NAME_free(WOLFSSL_STACK* sk)
{
    WOLFSSL_ENTER("sk_GENERAL_NAME_free");
    wolfSSL_sk_GENERAL_NAME_pop_free(sk, NULL);
}
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#ifdef OPENSSL_EXTRA
/* returns the number of nodes in stack on success and WOLFSSL_FATAL_ERROR
 * on fail */
int wolfSSL_sk_ACCESS_DESCRIPTION_num(WOLFSSL_STACK* sk)
{
    if (sk == NULL) {
        return WOLFSSL_FATAL_ERROR;
    }

    return (int)sk->num;
}

#ifndef NO_WOLFSSL_STUB
/* similar to call to sk_ACCESS_DESCRIPTION_pop_free */
void wolfSSL_AUTHORITY_INFO_ACCESS_free(
        WOLF_STACK_OF(WOLFSSL_ACCESS_DESCRIPTION)* sk)
{
    WOLFSSL_STUB("wolfSSL_AUTHORITY_INFO_ACCESS_free");
    (void)sk;
}
#endif

/* returns the node at index "idx", NULL if not found */
WOLFSSL_STACK* wolfSSL_sk_get_node(WOLFSSL_STACK* sk, int idx)
{
    int i;
    WOLFSSL_STACK* ret = NULL;
    WOLFSSL_STACK* current;

    current = sk;
    for (i = 0; i <= idx && current != NULL; i++) {
        if (i == idx) {
            ret = current;
            break;
        }
        current = current->next;
    }
    return ret;
}

/* returns NULL on fail and pointer to internal data on success */
WOLFSSL_ACCESS_DESCRIPTION* wolfSSL_sk_ACCESS_DESCRIPTION_value(
        WOLFSSL_STACK* sk, int idx)
{
    WOLFSSL_STACK* ret;

    if (sk == NULL) {
        return NULL;
    }

    ret = wolfSSL_sk_get_node(sk, idx);
    if (ret != NULL) {
        return ret->data.access;
    }
    return NULL;
}
#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
/* Frees GENERAL_NAME objects.
*/
void wolfSSL_GENERAL_NAME_free(WOLFSSL_GENERAL_NAME* name)
{
    WOLFSSL_ENTER("wolfSSL_GENERAL_NAME_Free");
    if(name != NULL) {
        if (name->d.dNSName != NULL) {
            wolfSSL_ASN1_STRING_free(name->d.dNSName);
            name->d.dNSName = NULL;
        }
        if (name->d.uniformResourceIdentifier != NULL) {
            wolfSSL_ASN1_STRING_free(name->d.uniformResourceIdentifier);
            name->d.uniformResourceIdentifier = NULL;
        }
        if (name->d.iPAddress != NULL) {
            wolfSSL_ASN1_STRING_free(name->d.iPAddress);
            name->d.iPAddress = NULL;
        }
        if (name->d.registeredID != NULL) {
            wolfSSL_ASN1_OBJECT_free(name->d.registeredID);
            name->d.registeredID = NULL;
        }
        if (name->d.ia5 != NULL) {
            wolfSSL_ASN1_STRING_free(name->d.ia5);
            name->d.ia5 = NULL;
        }
        XFREE(name, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#ifdef OPENSSL_EXTRA
void wolfSSL_GENERAL_NAMES_free(WOLFSSL_GENERAL_NAMES *gens)
{
    WOLFSSL_ENTER("wolfSSL_GENERAL_NAMES_free");

    if (gens == NULL) {
        return;
    }

    wolfSSL_sk_free(gens);
}

#if defined(OPENSSL_ALL)

void *wolfSSL_lh_retrieve(WOLFSSL_STACK *sk, void *data)
{
    unsigned long hash;

    WOLFSSL_ENTER("wolfSSL_lh_retrieve");

    if (!sk || !data) {
        WOLFSSL_MSG("Bad parameters");
        return NULL;
    }

    if (!sk->hash_fn) {
        WOLFSSL_MSG("No hash function defined");
        return NULL;
    }

    hash = sk->hash_fn(data);

    while (sk) {
        /* Calc hash if not done so yet */
        if (!sk->hash) {
            switch (sk->type) {
                case STACK_TYPE_CIPHER:
                    sk->hash = sk->hash_fn(&sk->data.cipher);
                    break;
                default:
                    sk->hash = sk->hash_fn(sk->data.generic);
                    break;
            }
        }
        if (sk->hash == hash) {
            switch (sk->type) {
                case STACK_TYPE_CIPHER:
                    return &sk->data.cipher;
                default:
                    return sk->data.generic;
            }
        }
        sk = sk->next;
    }

    return NULL;
}

/**
 * This is the same hashing algo for WOLFSSL_CONF_VALUE as OpenSSL
 */
static unsigned long wolfSSL_CONF_VALUE_hash(const WOLFSSL_CONF_VALUE *val)
{
    if (val)
        return (wolfSSL_LH_strhash(val->section) << 2) ^
                wolfSSL_LH_strhash(val->name);
    else
        return 0;
}

static int wolfssl_conf_value_cmp(const WOLFSSL_CONF_VALUE *a,
                                  const WOLFSSL_CONF_VALUE *b)
{
    int cmp_val;

    if (!a || !b) {
        return WOLFSSL_FATAL_ERROR;
    }

    if (a->section != b->section) {
        if ((cmp_val = XSTRCMP(a->section, b->section)) != 0) {
            return cmp_val;
        }
    }

    if (a->name && b->name) {
        return XSTRCMP(a->name, b->name);
    }
    else if (a->name == b->name) {
        return 0;
    }
    else {
        return a->name ? 1 : -1;
    }
}

/* Use MD5 for hashing as OpenSSL uses a hash algorithm that is
 * "not as good as MD5, but still good" so using MD5 should
 * be good enough for this application. The produced hashes don't
 * need to line up between OpenSSL and wolfSSL. The hashes are for
 * internal indexing only */
unsigned long wolfSSL_LH_strhash(const char *str)
{
    unsigned long ret = 0;
    int strLen;
    byte digest[WC_MD5_DIGEST_SIZE];
    WOLFSSL_ENTER("wolfSSL_LH_strhash");

    if (!str)
        return 0;

#ifndef NO_MD5
    strLen = (int)XSTRLEN(str);
    if (wc_Md5Hash((const byte*)str, strLen, digest) != 0) {
        WOLFSSL_MSG("wc_Md5Hash error");
        return 0;
    }
    /* Take first 4 bytes in small endian as unsigned long */
    ret  =  (unsigned int)digest[0];
    ret |= ((unsigned int)digest[1] << 8 );
    ret |= ((unsigned int)digest[2] << 16);
    ret |= ((unsigned int)digest[3] << 24);
#else
    WOLFSSL_MSG("No md5 available for wolfSSL_LH_strhash");
#endif
    return ret;
}

WOLFSSL_CONF_VALUE *wolfSSL_lh_WOLFSSL_CONF_VALUE_retrieve(
        WOLF_LHASH_OF(WOLFSSL_CONF_VALUE) *sk, WOLFSSL_CONF_VALUE *data)
{
    WOLFSSL_ENTER("wolfSSL_lh_WOLFSSL_CONF_VALUE_retrieve");

    if (!sk || !data) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    return (WOLFSSL_CONF_VALUE*)wolfSSL_lh_retrieve(sk, data);
}

int wolfSSL_CONF_modules_load(const WOLFSSL_CONF *cnf, const char *appname,
                      unsigned long flags)
{
    WOLFSSL_ENTER("wolfSSL_CONF_modules_load");
    WOLFSSL_MSG("All wolfSSL modules are already compiled in. "
                "wolfSSL_CONF_modules_load doesn't load anything new.");
    (void)cnf;
    (void)appname;
    (void)flags;
    return WOLFSSL_SUCCESS;
}

WOLFSSL_CONF_VALUE *wolfSSL_CONF_VALUE_new(void)
{
    WOLFSSL_CONF_VALUE* ret;

    WOLFSSL_ENTER("wolfSSL_CONF_new");

    ret = (WOLFSSL_CONF_VALUE*)XMALLOC(sizeof(WOLFSSL_CONF_VALUE),
            NULL, DYNAMIC_TYPE_OPENSSL);
    if (ret)
        XMEMSET(ret, 0, sizeof(WOLFSSL_CONF_VALUE));
    return ret;
}

int wolfSSL_CONF_add_string(WOLFSSL_CONF *conf,
        WOLFSSL_CONF_VALUE *section, WOLFSSL_CONF_VALUE *value)
{
    WOLF_STACK_OF(WOLFSSL_CONF_VALUE) *sk = NULL;

    if (!conf || !section || !value) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    sk = (WOLF_STACK_OF(WOLFSSL_CONF_VALUE) *)section->value;
    value->section = section->section;

    if (wolfSSL_sk_CONF_VALUE_push(sk, value) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("wolfSSL_sk_CONF_VALUE_push error");
        return WOLFSSL_FAILURE;
    }
    if (wolfSSL_sk_CONF_VALUE_push(conf->data, value) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("wolfSSL_sk_CONF_VALUE_push error");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

WOLFSSL_CONF_VALUE *wolfSSL_CONF_new_section(WOLFSSL_CONF *conf,
        const char *section)
{
    WOLFSSL_CONF_VALUE* ret = NULL;
    WOLF_STACK_OF(WOLFSSL_CONF_VALUE) *sk = NULL;
    int slen;

    WOLFSSL_ENTER("wolfSSL_CONF_new_section");

    if (!conf || !section) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    slen = (int)XSTRLEN(section);

    if (!(ret = wolfSSL_CONF_VALUE_new())) {
        WOLFSSL_MSG("wolfSSL_CONF_new error");
        goto error;
    }

    if (!(ret->section = (char*)XMALLOC(slen+1, NULL, DYNAMIC_TYPE_OPENSSL))) {
        WOLFSSL_MSG("section malloc error");
        goto error;
    }
    XMEMCPY(ret->section, section, slen+1);

    if (!(sk = wolfSSL_sk_CONF_VALUE_new(NULL))) {
        WOLFSSL_MSG("wolfSSL_sk_CONF_VALUE_new error");
        goto error;
    }

    ret->value = (char*)sk;

    if (wolfSSL_sk_CONF_VALUE_push(conf->data, ret) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("wolfSSL_sk_CONF_VALUE_push error");
        goto error;
    }

    return ret;
error:
    if (ret) {
        /* NULL so that wolfSSL_X509V3_conf_free doesn't attempt to free it */
        ret->value = NULL;
        wolfSSL_X509V3_conf_free(ret);
    }
    if (sk) {
        wolfSSL_sk_CONF_VALUE_free(sk);
    }
    return NULL;
}

WOLFSSL_CONF_VALUE *wolfSSL_CONF_get_section(WOLFSSL_CONF *conf,
        const char *section)
{
    WOLF_STACK_OF(WOLFSSL_CONF_VALUE) *sk = NULL;

    WOLFSSL_ENTER("wolfSSL_CONF_get_section");

    if (!conf || !section) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    sk = conf->data;

    while (sk) {
        WOLFSSL_CONF_VALUE* val = sk->data.conf;
        if (val) {
            if (!val->name && XSTRCMP(section, val->section) == 0) {
                return val;
            }
        }
        sk = sk->next;
    }

    return NULL;
}

WOLFSSL_CONF *wolfSSL_NCONF_new(void *meth)
{
    WOLFSSL_CONF* ret;
    WOLFSSL_ENTER("wolfSSL_NCONF_new");

    if (meth) {
        WOLFSSL_MSG("wolfSSL does not support CONF_METHOD");
    }

    ret = (WOLFSSL_CONF*)XMALLOC(sizeof(WOLFSSL_CONF), NULL, DYNAMIC_TYPE_OPENSSL);
    if (ret) {
        XMEMSET(ret, 0, sizeof(WOLFSSL_CONF));
        ret->data = wolfSSL_sk_CONF_VALUE_new(NULL);
        if (!ret->data) {
            wolfSSL_NCONF_free(ret);
            return NULL;
        }
    }
    return ret;
}

char *wolfSSL_NCONF_get_string(const WOLFSSL_CONF *conf,
        const char *group, const char *name)
{
    WOLFSSL_CONF_VALUE find_val;
    WOLFSSL_CONF_VALUE *val;
    WOLFSSL_ENTER("wolfSSL_NCONF_get_string");

    if (!conf) {
#ifdef HAVE_SECURE_GETENV
        return secure_getenv(name);
#else
        WOLFSSL_MSG("Missing secure_getenv");
        return NULL;
#endif
    }

    find_val.name = (char *)name;
    if (group) {
        find_val.section = (char *)group;
        val = wolfSSL_lh_WOLFSSL_CONF_VALUE_retrieve(conf->data, &find_val);
        if (val)
            return val->value;
        if (XSTRCMP(group, "ENV") == 0) {
#ifdef HAVE_SECURE_GETENV
            return secure_getenv(name);
#else
        WOLFSSL_MSG("Missing secure_getenv");
            return NULL;
#endif
        }
    }

    find_val.section = (char *)"default";
    val = wolfSSL_lh_WOLFSSL_CONF_VALUE_retrieve(conf->data, &find_val);
    if (val)
        return val->value;
    else
        return NULL;
}

int wolfSSL_NCONF_get_number(const CONF *conf, const char *group,
        const char *name, long *result)
{
    char *str;
    WOLFSSL_ENTER("wolfSSL_NCONF_get_number");

    if (!conf || !name || !result) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    if (!(str = wolfSSL_NCONF_get_string(conf, group, name))) {
        WOLFSSL_MSG("wolfSSL_NCONF_get_string error");
        return WOLFSSL_FAILURE;
    }

    *result = atol(str);
    return WOLFSSL_SUCCESS;
}

/**
 * The WOLFSSL_CONF->value member is treated as a
 * WOLFSSL_STACK_OF(WOLFSSL_CONF_VALUE) which becomes
 * the return value.
 * @param conf
 * @param section
 * @return WOLFSSL_STACK_OF(WOLFSSL_CONF_VALUE)
 */
WOLFSSL_STACK *wolfSSL_NCONF_get_section(
        const WOLFSSL_CONF *conf, const char *section)
{
    WOLFSSL_CONF_VALUE *val;
    WOLFSSL_CONF_VALUE find_val;

    WOLFSSL_ENTER("wolfSSL_NCONF_get_section");

    if (!conf || !section) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    find_val.name = NULL;
    find_val.section = (char*)section;
    val = wolfSSL_lh_WOLFSSL_CONF_VALUE_retrieve(conf->data, &find_val);
    if (val)
        return (WOLFSSL_STACK*)val->value;
    else
        return NULL;
}

static WOLFSSL_CONF_VALUE *wolfSSL_CONF_VALUE_new_values(char* section,
        char* name, char* value)
{
    WOLFSSL_CONF_VALUE* ret;
    int len;

    WOLFSSL_ENTER("wolfSSL_CONF_VALUE_new_values");

    if (!(ret = wolfSSL_CONF_VALUE_new())) {
        WOLFSSL_MSG("wolfSSL_CONF_VALUE_new error");
        return NULL;
    }

    if (section) {
        len = (int)XSTRLEN(section);
        ret->section = (char*)XMALLOC(len+1, NULL, DYNAMIC_TYPE_OPENSSL);
        if (!ret->section) {
            WOLFSSL_MSG("malloc error");
            wolfSSL_X509V3_conf_free(ret);
            return NULL;
        }
        XMEMCPY(ret->section, section, len+1);
    }

    if (name) {
        len = (int)XSTRLEN(name);
        ret->name = (char*)XMALLOC(len+1, NULL, DYNAMIC_TYPE_OPENSSL);
        if (!ret->name) {
            WOLFSSL_MSG("malloc error");
            wolfSSL_X509V3_conf_free(ret);
            return NULL;
        }
        XMEMCPY(ret->name, name, len+1);
    }

    if (value) {
        len = (int)XSTRLEN(value);
        ret->value = (char*)XMALLOC(len+1, NULL, DYNAMIC_TYPE_OPENSSL);
        if (!ret->value) {
            WOLFSSL_MSG("malloc error");
            wolfSSL_X509V3_conf_free(ret);
            return NULL;
        }
        XMEMCPY(ret->value, value, len+1);
    }

    return ret;
}

static char* expandValue(WOLFSSL_CONF *conf, const char* section,
        char *str)
{
    int strLen = (int)XSTRLEN(str);
    char* ret = NULL;

    /* Check to see if there is anything to expand */
    if (XSTRNSTR(str, "$", strLen)) {
        int idx = 0;
        char* strIdx = str;
        ret = (char*)XMALLOC(strLen + 1, NULL, DYNAMIC_TYPE_OPENSSL);
        if (!ret) {
            WOLFSSL_MSG("malloc error");
            return str;
        }

        while (*strIdx) {
            if (*strIdx == '$') {
                /* Expand variable */
                char* startIdx = ++strIdx;
                char* endIdx;
                const char* s = section;
                const char* value;
                char prevValue;

                if (*startIdx == '{') {
                    /* First read the section.
                     * format: ${section_name::var_name} */
                    s = ++startIdx;
                    while (*strIdx && *strIdx != ':') strIdx++;
                    if (!*strIdx || s == strIdx || strIdx[1] != ':') {
                        WOLFSSL_MSG("invalid section name in "
                                    "variable expansion");
                        goto expand_cleanup;
                    }
                    *strIdx = '\0';
                    strIdx += 2;
                    startIdx = strIdx;
                }
                while (*strIdx && (XISALNUM(*strIdx) || *strIdx == '_'))
                    strIdx++;
                endIdx = strIdx;
                if (startIdx == endIdx) {
                    WOLFSSL_MSG("invalid variable name in config");
                    goto expand_cleanup;
                }
                if (s != section) {
                    /* We are expecting a trailing '}' */
                    if (*strIdx != '}') {
                        WOLFSSL_MSG("Missing '}' in variable");
                        goto expand_cleanup;
                    }
                    strIdx++;
                }
                /* Save char value at the end of the name so that we can place
                 * a null char there. */
                prevValue = *endIdx;
                *endIdx = '\0';
                value = wolfSSL_NCONF_get_string(conf, s, startIdx);
                *endIdx = prevValue;
                /* Skip copy if no value or zero-length value */
                if (value && *value) {
                    int valueLen = (int)XSTRLEN(value);
                    char* newRet;
                    /* This will allocate slightly more memory than necessary
                     * but better be safe */
                    strLen += valueLen;
                    newRet = (char*)XREALLOC(ret, strLen + 1, NULL,
                            DYNAMIC_TYPE_OPENSSL);
                    if (!newRet) {
                        WOLFSSL_MSG("realloc error");
                        goto expand_cleanup;
                    }
                    ret = newRet;
                    XMEMCPY(ret + idx, value, valueLen);
                    idx += valueLen;
                }
            }
            else {
                ret[idx++] = *strIdx++;
            }
        }
        ret[idx] = '\0';
    }

    return ret ? ret : str;

expand_cleanup:
    if (ret)
        XFREE(ret, NULL, DYNAMIC_TYPE_OPENSSL);
    return NULL;
}

#define SKIP_WHITESPACE(idx, max_idx) \
    while (idx < max_idx && (*idx == ' ' || *idx == '\t')) \
        {idx++;}
int wolfSSL_NCONF_load(WOLFSSL_CONF *conf, const char *file, long *eline)
{
    int ret = WOLFSSL_FAILURE;
    WOLFSSL_BIO *in = NULL;
    char* buf = NULL;
    char* idx = NULL;
    char* bufEnd = NULL;
    CONF_VALUE* section = NULL;
    long line = 0;
    int bufLen = 0;

    if (!conf || !file) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    /* Open file */
    if (!(in = wolfSSL_BIO_new_file(file, "rb"))) {
        WOLFSSL_MSG("wolfSSL_BIO_new_file error");
        return WOLFSSL_FAILURE;
    }

    /* Read file */
    bufLen = wolfSSL_BIO_get_len(in);
    if (bufLen <= 0) {
        WOLFSSL_MSG("wolfSSL_BIO_get_len error");
        goto cleanup;
    }
    if (!(buf = (char*)XMALLOC(bufLen + 1, NULL, DYNAMIC_TYPE_TMP_BUFFER))) {
        WOLFSSL_MSG("malloc error");
        goto cleanup;
    }
    if (wolfSSL_BIO_read(in, buf, bufLen) != bufLen) {
        WOLFSSL_MSG("wolfSSL_BIO_read error");
        goto cleanup;
    }

    if (!(section = wolfSSL_CONF_new_section(conf, "default"))) {
        WOLFSSL_MSG("wolfSSL_CONF_new_section error");
        goto cleanup;
    }

    /* LETS START READING SOME CONFIGS */
    idx = buf;
    bufEnd = buf + bufLen;
    while (idx < bufEnd) {
        char* lineEnd = XSTRNSTR(idx, "\n", (unsigned int)(bufEnd - idx));
        char* maxIdx;
        if (!lineEnd)
            lineEnd = bufEnd; /* Last line in file */
        maxIdx = XSTRNSTR(idx, "#", (unsigned int)(lineEnd - idx));
        if (!maxIdx)
            maxIdx = lineEnd;
        line++;
        SKIP_WHITESPACE(idx, maxIdx);
        if (idx == maxIdx) {
            /* Empty line */
            idx = lineEnd + 1;
            continue;
        }

        if (*idx == '[') {
            /* New section. Spaces not allowed in section name. */
            char* sectionName;
            int sectionNameLen;

            if (idx < maxIdx)
                idx++;
            else {
                WOLFSSL_MSG("Invalid section definition.");
                goto cleanup;
            }

            SKIP_WHITESPACE(idx, maxIdx);
            sectionName = idx;
            /* Find end of section name */
            while (idx < maxIdx && *idx != ' ' && *idx != ']')
                idx++;
            sectionNameLen = (int)(idx - sectionName);
            SKIP_WHITESPACE(idx, maxIdx);

            if (*idx != ']') {
                WOLFSSL_MSG("Section definition error. "
                            "Closing brace not found.");
                goto cleanup;
            }

            sectionName[sectionNameLen] = '\0';
            if (!(section = wolfSSL_CONF_get_section(conf, sectionName))) {
                section = wolfSSL_CONF_new_section(conf, sectionName);
                if (!section)
                    goto cleanup;
            }
        }
        else {
            char* name;
            int   nameLen;
            char* value;
            char* exValue; /* expanded value */
            int   valueLen;
            WOLFSSL_CONF_VALUE* newVal = NULL;

            SKIP_WHITESPACE(idx, maxIdx);
            name = idx;
            /* Find end of name */
            while (idx < maxIdx && *idx != ' ' && *idx != '=')
                idx++;
            nameLen = (int)(idx - name);
            SKIP_WHITESPACE(idx, maxIdx);
            if (*idx != '=') {
                WOLFSSL_MSG("Missing equals sign");
                goto cleanup;
            }
            idx++;
            SKIP_WHITESPACE(idx, maxIdx);
            value = idx;
            /* Find end of value */
            idx = maxIdx-1;
            while (idx >= value && (*idx == ' ' || *idx == '\t'))
                idx--;
            valueLen = (int)(idx - value + 1);

            /* Sanity checks */
            if (nameLen <= 0 || valueLen <= 0) {
                WOLFSSL_MSG("Sanity checks failed");
                goto cleanup;
            }
            name[nameLen] = '\0';
            value[valueLen] = '\0';

            if (!(exValue = expandValue(conf, section->section, value))) {
                WOLFSSL_MSG("Variable expansion failed");
                goto cleanup;
            }

            if (!(newVal = wolfSSL_CONF_VALUE_new_values(NULL,
                    name, exValue))) {
                WOLFSSL_MSG("wolfSSL_CONF_VALUE_new_values error");
                if (exValue != value)
                    XFREE(exValue, NULL, DYNAMIC_TYPE_OPENSSL);
                goto cleanup;
            }

            if (exValue != value)
                XFREE(exValue, NULL, DYNAMIC_TYPE_OPENSSL);

            if (wolfSSL_CONF_add_string(conf, section, newVal) !=
                    WOLFSSL_SUCCESS) {
                WOLFSSL_MSG("wolfSSL_CONF_add_string error");
                goto cleanup;
            }
        }
        idx = lineEnd + 1;
    }

    ret = WOLFSSL_SUCCESS;
cleanup:
    if (in)
        wolfSSL_BIO_free(in);
    if (buf)
        XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (eline)
        *eline = line;
    return ret;
}


void wolfSSL_NCONF_free(WOLFSSL_CONF *conf)
{
    WOLFSSL_ENTER("wolfSSL_NCONF_free");
    if (conf) {
        wolfSSL_sk_CONF_VALUE_free(conf->data);
        XFREE(conf, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}

void wolfSSL_X509V3_conf_free(WOLFSSL_CONF_VALUE *val)
{
    WOLF_STACK_OF(WOLFSSL_CONF_VALUE) *sk = NULL;

    if (val) {
        if (val->name) {
            /* Not a section. Don't free section as it is a shared pointer. */
            XFREE(val->name, NULL, DYNAMIC_TYPE_OPENSSL);
            if (val->value)
                XFREE(val->value, NULL, DYNAMIC_TYPE_OPENSSL);
        }
        else {
            /* Section so val->value is a stack */
            if (val->section)
                XFREE(val->section, NULL, DYNAMIC_TYPE_OPENSSL);
            /* Only free the stack structures. The contained conf values
             * will be freed in wolfSSL_NCONF_free */
            sk = (WOLF_STACK_OF(WOLFSSL_CONF_VALUE)*)val->value;
            while (sk) {
                WOLF_STACK_OF(WOLFSSL_CONF_VALUE) *tmp = sk->next;
                XFREE(sk, NULL, DYNAMIC_TYPE_OPENSSL);
                sk = tmp;
            }
        }
        XFREE(val, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}

WOLFSSL_STACK *wolfSSL_sk_CONF_VALUE_new(wolf_sk_compare_cb compFunc)
{
    WOLFSSL_STACK* ret;
    WOLFSSL_ENTER("wolfSSL_sk_CONF_VALUE_new");
    ret = wolfSSL_sk_new_node(NULL);
    if (!ret)
        return NULL;
    ret->comp = compFunc ? compFunc : (wolf_sk_compare_cb)wolfssl_conf_value_cmp;
    ret->hash_fn = (wolf_sk_hash_cb)wolfSSL_CONF_VALUE_hash;
    ret->type = STACK_TYPE_CONF_VALUE;
    return ret;
}

/* Free the structure for WOLFSSL_CONF_VALUE stack
 *
 * sk  stack to free nodes in
 */
void wolfSSL_sk_CONF_VALUE_free(WOLF_STACK_OF(WOLFSSL_CONF_VALUE)* sk)
{
    WOLFSSL_STACK* tmp;
    WOLFSSL_ENTER("wolfSSL_sk_CONF_VALUE_free");

    if (sk == NULL)
        return;

    /* parse through stack freeing each node */
    while (sk) {
        tmp = sk->next;
        wolfSSL_X509V3_conf_free(sk->data.conf);
        XFREE(sk, NULL, DYNAMIC_TYPE_OPENSSL);
        sk = tmp;
    }
}

int wolfSSL_sk_CONF_VALUE_num(const WOLFSSL_STACK *sk)
{
    WOLFSSL_ENTER("wolfSSL_sk_CONF_VALUE_num");
    if (sk)
        return wolfSSL_sk_num(sk);
    return 0;
}

WOLFSSL_CONF_VALUE *wolfSSL_sk_CONF_VALUE_value(const WOLFSSL_STACK *sk, int i)
{
    WOLFSSL_ENTER("wolfSSL_sk_CONF_VALUE_value");
    if (sk)
        return (WOLFSSL_CONF_VALUE*)wolfSSL_sk_value(sk, i);
    return NULL;
}

/* return 1 on success 0 on fail */
int wolfSSL_sk_CONF_VALUE_push(WOLF_STACK_OF(WOLFSSL_CONF_VALUE)* sk,
        WOLFSSL_CONF_VALUE* val)
{
    WOLFSSL_ENTER("wolfSSL_sk_CONF_VALUE_push");

    if (sk == NULL || val == NULL) {
        return WOLFSSL_FAILURE;
    }

    return wolfSSL_sk_push(sk, val);
}

WOLF_STACK_OF(WOLFSSL_X509_EXTENSION)* wolfSSL_sk_X509_EXTENSION_new_null(void)
{
    WOLFSSL_STACK* sk = wolfSSL_sk_new_node(NULL);
    if (sk) {
        sk->type = STACK_TYPE_X509_EXT;
    }

    return (WOLF_STACK_OF(WOLFSSL_X509_EXTENSION)*)sk;;
}

/* returns the number of nodes on the stack */
int wolfSSL_sk_X509_EXTENSION_num(WOLF_STACK_OF(WOLFSSL_X509_EXTENSION)* sk)
{
    if (sk != NULL) {
        return (int)sk->num;
    }
    return WOLFSSL_FATAL_ERROR;
}


/* returns null on failure and pointer to internal value on success */
WOLFSSL_X509_EXTENSION* wolfSSL_sk_X509_EXTENSION_value(
        WOLF_STACK_OF(WOLFSSL_X509_EXTENSION)* sk, int idx)
{
    WOLFSSL_STACK* ret;

    if (sk == NULL) {
        return NULL;
    }

    ret = wolfSSL_sk_get_node(sk, idx);
    if (ret != NULL) {
        return ret->data.ext;
    }
    return NULL;
}

/* frees all of the nodes and the values in stack */
void wolfSSL_sk_X509_EXTENSION_pop_free(
        WOLF_STACK_OF(WOLFSSL_X509_EXTENSION)* sk,
        void (*f) (WOLFSSL_X509_EXTENSION*))
{
    WOLFSSL_STACK* current;

    if (sk == NULL) {
        return;
    }

    current = sk;
    while (current != NULL) {
        WOLFSSL_STACK* toFree = current;
        current = current->next;

        if (f)
            f(toFree->data.ext);
        wolfSSL_sk_free_node(toFree);
    }
}

#if defined(HAVE_ECC)
/* Copies ecc_key into new WOLFSSL_EC_KEY object
 *
 * src  : EC_KEY to duplicate. If EC_KEY is not null, create new EC_KEY and copy
 * internal ecc_key from src to dup.
 *
 * Returns pointer to duplicate EC_KEY.
 */
WOLFSSL_EC_KEY *wolfSSL_EC_KEY_dup(const WOLFSSL_EC_KEY *src)
{
    WOLFSSL_EC_KEY *dup;
    ecc_key *key, *srcKey;
    int ret;

    WOLFSSL_ENTER("wolfSSL_EC_KEY_dup");

    if (src == NULL || src->internal == NULL || src->group == NULL || \
       src->pub_key == NULL || src->priv_key == NULL) {

        WOLFSSL_MSG("src NULL error");
        return NULL;
    }

    dup = wolfSSL_EC_KEY_new();
    if (dup == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_new error");
        return NULL;
    }

    key = (ecc_key*)dup->internal;
    if (key == NULL) {
        WOLFSSL_MSG("ecc_key NULL error");
        wolfSSL_EC_KEY_free(dup);
        return NULL;
    }
    srcKey = (ecc_key*)src->internal;

    /* ecc_key */
    /* copy pubkey */
    ret = wc_ecc_copy_point(&srcKey->pubkey, &key->pubkey);
    if (ret != MP_OKAY) {
        WOLFSSL_MSG("wc_ecc_copy_point error");
        wolfSSL_EC_KEY_free(dup);
        return NULL;
    }

    /* copy private key k */
    ret = mp_copy(&srcKey->k, &key->k);
    if (ret != MP_OKAY) {
        WOLFSSL_MSG("mp_copy error");
        wolfSSL_EC_KEY_free(dup);
        return NULL;
    }

    /* copy domain parameters */
    if (srcKey->dp) {
        ret = wc_ecc_set_curve(key, 0, srcKey->dp->id);
        if (ret != 0) {
            WOLFSSL_MSG("wc_ecc_set_curve error");
            return NULL;
        }
    }

    key->type  = srcKey->type;
    key->idx   = srcKey->idx;
    key->state = srcKey->state;
    key->flags = srcKey->flags;

    /* Copy group */
    if (dup->group == NULL) {
        WOLFSSL_MSG("EC_GROUP_new_by_curve_name error");
        wolfSSL_EC_KEY_free(dup);
        return NULL;
    }

    dup->group->curve_idx = src->group->curve_idx;
    dup->group->curve_nid = src->group->curve_nid;
    dup->group->curve_oid = src->group->curve_oid;

    /* Copy public key */
    if (src->pub_key->internal == NULL || dup->pub_key->internal == NULL) {
        WOLFSSL_MSG("NULL pub_key error");
        wolfSSL_EC_KEY_free(dup);
        return NULL;
    }

    /* Copy public key internal */
    ret = wc_ecc_copy_point((ecc_point*)src->pub_key->internal, \
                            (ecc_point*)dup->pub_key->internal);
    if (ret != MP_OKAY) {
        WOLFSSL_MSG("ecc_copy_point error");
        wolfSSL_EC_KEY_free(dup);
        return NULL;
    }

    /* Copy X, Y, Z */
    dup->pub_key->X = wolfSSL_BN_dup(src->pub_key->X);
    if (!dup->pub_key->X && src->pub_key->X) {
        WOLFSSL_MSG("Error copying EC_POINT");
        wolfSSL_EC_KEY_free(dup);
        return NULL;
    }
    dup->pub_key->Y = wolfSSL_BN_dup(src->pub_key->Y);
    if (!dup->pub_key->Y && src->pub_key->Y) {
        WOLFSSL_MSG("Error copying EC_POINT");
        wolfSSL_EC_KEY_free(dup);
        return NULL;
    }
    dup->pub_key->Z = wolfSSL_BN_dup(src->pub_key->Z);
    if (!dup->pub_key->Z && src->pub_key->Z) {
        WOLFSSL_MSG("Error copying EC_POINT");
        wolfSSL_EC_KEY_free(dup);
        return NULL;
    }

    dup->pub_key->inSet = src->pub_key->inSet;
    dup->pub_key->exSet = src->pub_key->exSet;

    /* Copy private key */
    if (src->priv_key->internal == NULL || dup->priv_key->internal == NULL) {
        WOLFSSL_MSG("NULL priv_key error");
        wolfSSL_EC_KEY_free(dup);
        return NULL;
    }

    /* Free priv_key before call to dup function */
    wolfSSL_BN_free(dup->priv_key);
    dup->priv_key = wolfSSL_BN_dup(src->priv_key);
    if (dup->priv_key == NULL) {
        WOLFSSL_MSG("BN_dup error");
        wolfSSL_EC_KEY_free(dup);
        return NULL;
    }

    return dup;

}
#endif /* HAVE_ECC */

#if !defined(NO_DH)
int wolfSSL_DH_check(const WOLFSSL_DH *dh, int *codes)
{
    int isPrime = MP_NO, codeTmp = 0;
    WC_RNG rng;

    WOLFSSL_ENTER("wolfSSL_DH_check");
    if (dh == NULL){
        return WOLFSSL_FAILURE;
    }

    if (dh->g == NULL || dh->g->internal == NULL){
        codeTmp = DH_NOT_SUITABLE_GENERATOR;
    }

    if (dh->p == NULL || dh->p->internal == NULL){
        codeTmp = DH_CHECK_P_NOT_PRIME;
    }
    else
    {
        /* test if dh->p has prime */
        if (wc_InitRng(&rng) == 0){
            mp_prime_is_prime_ex((mp_int*)dh->p->internal,8,&isPrime,&rng);
        }
        else {
            WOLFSSL_MSG("Error initializing rng\n");
            return WOLFSSL_FAILURE;
        }
        wc_FreeRng(&rng);
        if (isPrime != MP_YES){
            codeTmp = DH_CHECK_P_NOT_PRIME;
        }
    }
    /* User may choose to enter NULL for codes if they don't want to check it*/
    if (codes != NULL){
        *codes = codeTmp;
    }

    /* if codeTmp was set,some check was flagged invalid */
    if (codeTmp){
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

#if !defined(HAVE_FIPS) || (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION>2))
/* Converts DER encoded DH parameters to a WOLFSSL_DH structure.
 *
 * dh   : structure to copy DH parameters into.
 * pp   : DER encoded DH parameters
 * length   : length to copy
 *
 * Returns pointer to WOLFSSL_DH structure on success, or NULL on failure
 */
WOLFSSL_DH *wolfSSL_d2i_DHparams(WOLFSSL_DH **dh, const unsigned char **pp,
                                                                    long length)
{
    WOLFSSL_DH *newDH = NULL;
    int ret;
    word32 idx = 0;

    WOLFSSL_ENTER("wolfSSL_d2i_DHparams");

    if (pp == NULL || length <= 0) {
        WOLFSSL_MSG("bad argument");
        return NULL;
    }

    if ((newDH = wolfSSL_DH_new()) == NULL) {
        WOLFSSL_MSG("wolfSSL_DH_new() failed");
        return NULL;
    }

    ret = wc_DhKeyDecode(*pp, &idx, (DhKey*)newDH->internal, (word32)length);
    if (ret != 0) {
        WOLFSSL_MSG("DhKeyDecode() failed");
        wolfSSL_DH_free(newDH);
        return NULL;
    }
    newDH->inSet = 1;

    if (SetDhExternal(newDH) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetDhExternal failed");
        wolfSSL_DH_free(newDH);
        return NULL;
    }

    *pp += length;
    if (dh != NULL){
        *dh = newDH;
    }

    return newDH;
}
#endif /* !HAVE_FIPS || HAVE_FIPS_VERSION > 2 */

/* Converts internal WOLFSSL_DH structure to DER encoded DH.
 *
 * dh   : structure to copy DH parameters from.
 * out  : DER buffer for DH parameters
 *
 * Returns size of DER on success and WOLFSSL_FAILURE if error
 */
int wolfSSL_i2d_DHparams(const WOLFSSL_DH *dh, unsigned char **out)
{
    word32 len;
    int ret = 0;

    WOLFSSL_ENTER("wolfSSL_i2d_DHparams");

    if (dh == NULL) {
        WOLFSSL_MSG("Bad parameters");
        return WOLFSSL_FAILURE;
    }

    /* Get total length */
    len = 2 + mp_leading_bit((mp_int*)dh->p->internal) +
              mp_unsigned_bin_size((mp_int*)dh->p->internal) +
          2 + mp_leading_bit((mp_int*)dh->g->internal) +
              mp_unsigned_bin_size((mp_int*)dh->g->internal);

    /* Two bytes required for length if ASN.1 SEQ data greater than 127 bytes
     * and less than 256 bytes.
     */
    len = ((len > 127) ? 2 : 1) + len;

    if (out != NULL && *out != NULL) {
        ret = StoreDHparams(*out, &len, (mp_int*)dh->p->internal,
                                        (mp_int*)dh->g->internal);
        if (ret != MP_OKAY) {
            WOLFSSL_MSG("StoreDHparams error");
            len = 0;
        }
        else{
            *out += len;
        }
    }
    return (int)len;
}
#endif /* !NO_DH */

#endif /* OPENSSL_ALL */

#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) && !defined(NO_FILESYSTEM) && !defined(NO_STDIO_FILESYSTEM)

WOLFSSL_X509* wolfSSL_X509_d2i_fp(WOLFSSL_X509** x509, XFILE file)
{
    WOLFSSL_X509* newX509 = NULL;

    WOLFSSL_ENTER("wolfSSL_X509_d2i_fp");

    if (file != XBADFILE) {
        byte* fileBuffer = NULL;
        long sz = 0;

        if (XFSEEK(file, 0, XSEEK_END) != 0)
            return NULL;
        sz = XFTELL(file);
        XREWIND(file);

        if (sz > MAX_WOLFSSL_FILE_SIZE || sz < 0) {
            WOLFSSL_MSG("X509_d2i file size error");
            return NULL;
        }

        fileBuffer = (byte*)XMALLOC(sz, NULL, DYNAMIC_TYPE_FILE);
        if (fileBuffer != NULL) {
            int ret = (int)XFREAD(fileBuffer, 1, sz, file);
            if (ret == sz) {
                newX509 = wolfSSL_X509_d2i(NULL, fileBuffer, (int)sz);
            }
            XFREE(fileBuffer, NULL, DYNAMIC_TYPE_FILE);
        }
    }

    if (x509 != NULL)
        *x509 = newX509;

    return newX509;
}

#endif /* OPENSSL_EXTRA && !NO_FILESYSTEM && !NO_STDIO_FILESYSTEM */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL) || \
    defined(KEEP_PEER_CERT) || defined(SESSION_CERTS)
    
#ifndef NO_FILESYSTEM
WOLFSSL_ABI
WOLFSSL_X509* wolfSSL_X509_load_certificate_file(const char* fname, int format)
{
#ifdef WOLFSSL_SMALL_STACK
    byte  staticBuffer[1]; /* force heap usage */
#else
    byte  staticBuffer[FILE_BUFFER_SIZE];
#endif
    byte* fileBuffer = staticBuffer;
    int   dynamic = 0;
    int   ret;
    long  sz = 0;
    XFILE file;

    WOLFSSL_X509* x509 = NULL;

    /* Check the inputs */
    if ((fname == NULL) ||
        (format != WOLFSSL_FILETYPE_ASN1 && format != WOLFSSL_FILETYPE_PEM))
        return NULL;

    file = XFOPEN(fname, "rb");
    if (file == XBADFILE)
        return NULL;

    if (XFSEEK(file, 0, XSEEK_END) != 0){
        XFCLOSE(file);
        return NULL;
    }
    sz = XFTELL(file);
    XREWIND(file);

    if (sz > MAX_WOLFSSL_FILE_SIZE || sz < 0) {
        WOLFSSL_MSG("X509_load_certificate_file size error");
        XFCLOSE(file);
        return NULL;
    }

    if (sz > (long)sizeof(staticBuffer)) {
        fileBuffer = (byte*)XMALLOC(sz, NULL, DYNAMIC_TYPE_FILE);
        if (fileBuffer == NULL) {
            XFCLOSE(file);
            return NULL;
        }
        dynamic = 1;
    }

    ret = (int)XFREAD(fileBuffer, 1, sz, file);
    if (ret != sz) {
        XFCLOSE(file);
        if (dynamic)
            XFREE(fileBuffer, NULL, DYNAMIC_TYPE_FILE);
        return NULL;
    }

    XFCLOSE(file);

    x509 = wolfSSL_X509_load_certificate_buffer(fileBuffer, (int)sz, format);

    if (dynamic)
        XFREE(fileBuffer, NULL, DYNAMIC_TYPE_FILE);

    return x509;
}
#endif /* !NO_FILESYSTEM */

static WOLFSSL_X509* loadX509orX509REQFromBuffer(
    const unsigned char* buf, int sz, int format, int type)
{

    int ret;
    WOLFSSL_X509* x509 = NULL;
    DerBuffer* der = NULL;

    WOLFSSL_ENTER("wolfSSL_X509_load_certificate_ex");

    if (format == WOLFSSL_FILETYPE_PEM) {
    #ifdef WOLFSSL_PEM_TO_DER
        if (PemToDer(buf, sz, type, &der, NULL, NULL, NULL) != 0) {
            FreeDer(&der);
        }
    #else
        ret = NOT_COMPILED_IN;
    #endif
    }
    else {
        ret = AllocDer(&der, (word32)sz, type, NULL);
        if (ret == 0) {
            XMEMCPY(der->buffer, buf, sz);
        }
    }

    /* At this point we want `der` to have the certificate in DER format */
    /* ready to be decoded. */
    if (der != NULL && der->buffer != NULL) {
    #ifdef WOLFSSL_SMALL_STACK
        DecodedCert* cert;
    #else
        DecodedCert  cert[1];
    #endif

    #ifdef WOLFSSL_SMALL_STACK
        cert = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL,
                                     DYNAMIC_TYPE_DCERT);
        if (cert != NULL)
    #endif
        {
            InitDecodedCert(cert, der->buffer, der->length, NULL);
            if (ParseCertRelative(cert, type, 0, NULL) == 0) {
                x509 = (WOLFSSL_X509*)XMALLOC(sizeof(WOLFSSL_X509), NULL,
                                                             DYNAMIC_TYPE_X509);
                if (x509 != NULL) {
                    InitX509(x509, 1, NULL);
                    if (CopyDecodedToX509(x509, cert) != 0) {
                        wolfSSL_X509_free(x509);
                        x509 = NULL;
                    }
                }
            }

            FreeDecodedCert(cert);
        #ifdef WOLFSSL_SMALL_STACK
            XFREE(cert, NULL, DYNAMIC_TYPE_DCERT);
        #endif
        }

        FreeDer(&der);
    }

    return x509;
}

WOLFSSL_X509* wolfSSL_X509_load_certificate_buffer(
    const unsigned char* buf, int sz, int format)
{
    return loadX509orX509REQFromBuffer(buf, sz,
            format, CERT_TYPE);
}

#ifdef WOLFSSL_CERT_REQ
WOLFSSL_X509* wolfSSL_X509_REQ_load_certificate_buffer(
    const unsigned char* buf, int sz, int format)
{
    return loadX509orX509REQFromBuffer(buf, sz,
            format, CERTREQ_TYPE);
}
#endif

#endif /* KEEP_PEER_CERT || SESSION_CERTS */

/* OPENSSL_EXTRA is needed for wolfSSL_X509_d21 function
   KEEP_OUR_CERT is to insure ability for returning ssl certificate */
#if (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)) && \
    defined(KEEP_OUR_CERT)
WOLFSSL_X509* wolfSSL_get_certificate(WOLFSSL* ssl)
{
    if (ssl == NULL) {
        return NULL;
    }

    if (ssl->buffers.weOwnCert) {
        if (ssl->ourCert == NULL) {
            if (ssl->buffers.certificate == NULL) {
                WOLFSSL_MSG("Certificate buffer not set!");
                return NULL;
            }
            #ifndef WOLFSSL_X509_STORE_CERTS
            ssl->ourCert = wolfSSL_X509_d2i(NULL,
                                              ssl->buffers.certificate->buffer,
                                              ssl->buffers.certificate->length);
            #endif
        }
        return ssl->ourCert;
    }
    else { /* if cert not owned get parent ctx cert or return null */
        if (ssl->ctx) {
            if (ssl->ctx->ourCert == NULL) {
                if (ssl->ctx->certificate == NULL) {
                    WOLFSSL_MSG("Ctx Certificate buffer not set!");
                    return NULL;
                }
                #ifndef WOLFSSL_X509_STORE_CERTS
                ssl->ctx->ourCert = wolfSSL_X509_d2i(NULL,
                                               ssl->ctx->certificate->buffer,
                                               ssl->ctx->certificate->length);
                #endif
                ssl->ctx->ownOurCert = 1;
            }
            return ssl->ctx->ourCert;
        }
    }

    return NULL;
}

WOLFSSL_X509* wolfSSL_CTX_get0_certificate(WOLFSSL_CTX* ctx)
{
    if (ctx) {
        if (ctx->ourCert == NULL) {
            if (ctx->certificate == NULL) {
                WOLFSSL_MSG("Ctx Certificate buffer not set!");
                return NULL;
            }
            #ifndef WOLFSSL_X509_STORE_CERTS
            ctx->ourCert = wolfSSL_X509_d2i(NULL,
                                           ctx->certificate->buffer,
                                           ctx->certificate->length);
            #endif
            ctx->ownOurCert = 1;
        }
        return ctx->ourCert;
    }
    return NULL;
}
#endif /* OPENSSL_EXTRA && KEEP_OUR_CERT */
#endif /* NO_CERTS */


#if !defined(NO_ASN) && (defined(OPENSSL_EXTRA) || \
        defined(OPENSSL_EXTRA_X509_SMALL))
void wolfSSL_ASN1_OBJECT_free(WOLFSSL_ASN1_OBJECT* obj)
{
    if (obj == NULL) {
        return;
    }
    if ((obj->obj != NULL) && ((obj->dynamic & WOLFSSL_ASN1_DYNAMIC_DATA) != 0)) {
        WOLFSSL_MSG("Freeing ASN1 data");
        XFREE((void*)obj->obj, obj->heap, DYNAMIC_TYPE_ASN1);
        obj->obj = NULL;
    }
    #if defined(WOLFSSL_QT) || defined(OPENSSL_ALL)
    if (obj->pathlen != NULL) {
        wolfSSL_ASN1_INTEGER_free(obj->pathlen);
        obj->pathlen = NULL;
    }
    #endif
    if ((obj->dynamic & WOLFSSL_ASN1_DYNAMIC) != 0) {
        WOLFSSL_MSG("Freeing ASN1 OBJECT");
        XFREE(obj, NULL, DYNAMIC_TYPE_ASN1);
    }
}

WOLFSSL_ASN1_OBJECT* wolfSSL_ASN1_OBJECT_new(void)
{
    WOLFSSL_ASN1_OBJECT* obj;

    obj = (WOLFSSL_ASN1_OBJECT*)XMALLOC(sizeof(WOLFSSL_ASN1_OBJECT), NULL,
                                        DYNAMIC_TYPE_ASN1);
    if (obj == NULL) {
        return NULL;
    }

    XMEMSET(obj, 0, sizeof(WOLFSSL_ASN1_OBJECT));
    obj->d.ia5 = &(obj->d.ia5_internal);
#if defined(WOLFSSL_QT) || defined(OPENSSL_ALL)
    obj->d.iPAddress = &(obj->d.iPAddress_internal);
#endif
    obj->dynamic |= WOLFSSL_ASN1_DYNAMIC;
    return obj;
}

WOLFSSL_ASN1_OBJECT* wolfSSL_ASN1_OBJECT_dup(WOLFSSL_ASN1_OBJECT* obj)
{
    WOLFSSL_ASN1_OBJECT* dupl = NULL;

    WOLFSSL_ENTER("wolfSSL_ASN1_OBJECT_dup");

    if (!obj) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }
    dupl = wolfSSL_ASN1_OBJECT_new();
    if (!dupl) {
        WOLFSSL_MSG("wolfSSL_ASN1_OBJECT_new error");
        return NULL;
    }
    /* Copy data */
    XMEMCPY(dupl->sName, obj->sName, WOLFSSL_MAX_SNAME);
    dupl->type = obj->type;
    dupl->grp = obj->grp;
    dupl->nid = obj->nid;
    dupl->objSz = obj->objSz;
    if (obj->obj) {
        dupl->obj = (const unsigned char*)XMALLOC(
                obj->objSz, NULL, DYNAMIC_TYPE_ASN1);
        if (!dupl->obj) {
            WOLFSSL_MSG("ASN1 obj malloc error");
            wolfSSL_ASN1_OBJECT_free(dupl);
            return NULL;
        }
        XMEMCPY((byte*)dupl->obj, obj->obj, obj->objSz);
        dupl->dynamic |= WOLFSSL_ASN1_DYNAMIC_DATA;
    }
    return dupl;
}
#endif /* !NO_ASN && (OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL) */

#ifndef NO_ASN
#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
/* Creates and returns a new WOLFSSL_CIPHER stack. */
WOLFSSL_STACK* wolfSSL_sk_new_asn1_obj(void)
{
    WOLFSSL_STACK* sk;
    WOLFSSL_ENTER("wolfSSL_sk_new_asn1_obj");

    sk = wolfSSL_sk_new_null();
    if (sk == NULL)
        return NULL;
    sk->type = STACK_TYPE_OBJ;

    return sk;
}

/* return 1 on success 0 on fail */
int wolfSSL_sk_ASN1_OBJECT_push(WOLF_STACK_OF(WOLFSSL_ASN1_OBJECT)* sk,
                                              WOLFSSL_ASN1_OBJECT* obj)
{
    WOLFSSL_ENTER("wolfSSL_sk_ASN1_OBJECT_push");

    if (sk == NULL || obj == NULL) {
        return WOLFSSL_FAILURE;
    }

    return wolfSSL_sk_push(sk, obj);
}


WOLFSSL_ASN1_OBJECT* wolfSSL_sk_ASN1_OBJECT_pop(
                                        WOLF_STACK_OF(WOLFSSL_ASN1_OBJECT)* sk)
{
    WOLFSSL_STACK* node;
    WOLFSSL_ASN1_OBJECT* obj;

    if (sk == NULL) {
        return NULL;
    }

    node = sk->next;
    obj = sk->data.obj;

    if (node != NULL) { /* update sk and remove node from stack */
        sk->data.obj = node->data.obj;
        sk->next = node->next;
        XFREE(node, NULL, DYNAMIC_TYPE_ASN1);
    }
    else { /* last obj in stack */
        sk->data.obj = NULL;
    }

    if (sk->num > 0) {
        sk->num -= 1;
    }

    return obj;
}


/* Free the structure for ASN1_OBJECT stack
 *
 * sk  stack to free nodes in
 */
void wolfSSL_sk_ASN1_OBJECT_free(WOLF_STACK_OF(WOLFSSL_ASN1_OBJECT)* sk)
{
    wolfSSL_sk_ASN1_OBJECT_pop_free(sk, NULL);
}

/* Free's all nodes in ASN1_OBJECT stack.
 * This is different then wolfSSL_ASN1_OBJECT_free in that it allows for
 * choosing the function to use when freeing an ASN1_OBJECT stack.
 *
 * sk  stack to free nodes in
 * f   X509 free function
 */
void wolfSSL_sk_ASN1_OBJECT_pop_free(WOLF_STACK_OF(WOLFSSL_ASN1_OBJECT)* sk,
                                     void (*f) (WOLFSSL_ASN1_OBJECT*))
{
    WOLFSSL_STACK* node;

    WOLFSSL_ENTER("wolfSSL_sk_ASN1_OBJECT_pop_free");

    if (sk == NULL) {
        WOLFSSL_MSG("Parameter error");
        return;
    }

    /* parse through stack freeing each node */
    node = sk->next;
    while (node && sk->num > 1) {
        WOLFSSL_STACK* tmp = node;
        node = node->next;

        if (f)
            f(tmp->data.obj);
        else
            wolfSSL_ASN1_OBJECT_free(tmp->data.obj);
        tmp->data.obj = NULL;
        XFREE(tmp, NULL, DYNAMIC_TYPE_ASN1);
        sk->num -= 1;
    }

    /* free head of stack */
    if (sk->num == 1) {
        if (f)
            f(sk->data.obj);
        else
            wolfSSL_ASN1_OBJECT_free(sk->data.obj);
        sk->data.obj = NULL;
    }
    XFREE(sk, NULL, DYNAMIC_TYPE_ASN1);
}

#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */
#endif /* !NO_ASN */

#ifdef OPENSSL_EXTRA
#ifndef NO_ASN

int wolfSSL_ASN1_STRING_to_UTF8(unsigned char **out, WOLFSSL_ASN1_STRING *in)
{
    /*
       ASN1_STRING_to_UTF8() converts the string in to UTF8 format,
       the converted data is allocated in a buffer in *out.
       The length of out is returned or a negative error code.
       The buffer *out should be free using OPENSSL_free().
       */
    unsigned char* buf;
    unsigned char* inPtr;
    int inLen;

    if (!out || !in) {
        return -1;
    }

    inPtr = wolfSSL_ASN1_STRING_data(in);
    inLen = wolfSSL_ASN1_STRING_length(in);
    if (!inPtr || inLen < 0) {
        return -1;
    }
    buf = (unsigned char*)XMALLOC(inLen + 1, NULL, DYNAMIC_TYPE_OPENSSL);
    if (!buf) {
        return -1;
    }
    XMEMCPY(buf, inPtr, inLen + 1);
    *out = buf;
    return inLen;
}

int wolfSSL_ASN1_UNIVERSALSTRING_to_string(WOLFSSL_ASN1_STRING *s)
{
    char *idx;
    char *copy;
    WOLFSSL_ENTER("wolfSSL_ASN1_UNIVERSALSTRING_to_string");

    if (!s) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    if (s->type != V_ASN1_UNIVERSALSTRING) {
        WOLFSSL_MSG("Input is not a universal string");
        return WOLFSSL_FAILURE;
    }

    if ((s->length % 4) != 0) {
        WOLFSSL_MSG("Input string must be divisible by 4");
        return WOLFSSL_FAILURE;
    }

    for (idx = s->data; idx < s->data + s->length; idx += 4)
        if ((idx[0] != '\0') || (idx[1] != '\0') || (idx[2] != '\0'))
            break;

    if (idx != s->data + s->length) {
        WOLFSSL_MSG("Wrong string format");
        return WOLFSSL_FAILURE;
    }

    for (copy = idx = s->data; idx < s->data + s->length; idx += 4)
        *copy++ = idx[3];
    *copy = '\0';
    s->length /= 4;
    s->type = V_ASN1_PRINTABLESTRING;
    return WOLFSSL_SUCCESS;
}

/* Returns string representation of ASN1_STRING */
char* wolfSSL_i2s_ASN1_STRING(WOLFSSL_v3_ext_method *method,
    const WOLFSSL_ASN1_STRING *s)
{
    int i;
    int tmpSz = 100;
    int valSz = 5;
    char* tmp;
    char val[5];
    unsigned char* str;

    WOLFSSL_ENTER("wolfSSL_i2s_ASN1_STRING");
    (void)method;

    if(s == NULL || s->data == NULL) {
        WOLFSSL_MSG("Bad Function Argument");
        return NULL;
    }
    str = (unsigned char*)XMALLOC(s->length, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (str == NULL) {
        WOLFSSL_MSG("Memory Error");
        return NULL;
    }
    XMEMCPY(str, (unsigned char*)s->data, s->length);

    tmp = (char*)XMALLOC(tmpSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (tmp == NULL) {
        WOLFSSL_MSG("Memory Error");
        XFREE(str, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        return NULL;
    }
    XMEMSET(tmp, 0, tmpSz);

    for (i = 0; i < tmpSz && i < (s->length - 1); i++) {
        XSNPRINTF(val, valSz - 1, "%02X:", str[i]);
        XSTRNCAT(tmp, val, valSz);
    }
    XSNPRINTF(val, valSz - 1, "%02X", str[i]);
    XSTRNCAT(tmp, val, valSz);
    XFREE(str, NULL, DYNAMIC_TYPE_TMP_BUFFER);

    return tmp;
}
#endif /* NO_ASN */
#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
void wolfSSL_set_connect_state(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_set_connect_state");
    if (ssl == NULL) {
        WOLFSSL_MSG("WOLFSSL struct pointer passed in was null");
        return;
    }

    #ifndef NO_DH
    /* client creates its own DH parameters on handshake */
    if (ssl->buffers.serverDH_P.buffer && ssl->buffers.weOwnDH) {
        XFREE(ssl->buffers.serverDH_P.buffer, ssl->heap,
            DYNAMIC_TYPE_PUBLIC_KEY);
    }
    ssl->buffers.serverDH_P.buffer = NULL;
    if (ssl->buffers.serverDH_G.buffer && ssl->buffers.weOwnDH) {
        XFREE(ssl->buffers.serverDH_G.buffer, ssl->heap,
            DYNAMIC_TYPE_PUBLIC_KEY);
    }
    ssl->buffers.serverDH_G.buffer = NULL;
    #endif

    if (InitSSL_Side(ssl, WOLFSSL_CLIENT_END) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("Error initializing client side");
    }
}
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */


int wolfSSL_get_shutdown(const WOLFSSL* ssl)
{
    int isShutdown = 0;

    WOLFSSL_ENTER("wolfSSL_get_shutdown");

    if (ssl) {
        /* in OpenSSL, WOLFSSL_SENT_SHUTDOWN = 1, when closeNotifySent   *
         * WOLFSSL_RECEIVED_SHUTDOWN = 2, from close notify or fatal err */
        isShutdown = ((ssl->options.closeNotify||ssl->options.connReset) << 1)
                    | (ssl->options.sentNotify);
    }
    return isShutdown;
}


int wolfSSL_session_reused(WOLFSSL* ssl)
{
    int resuming = 0;
    if (ssl)
        resuming = ssl->options.resuming;
    return resuming;
}

#if defined(OPENSSL_EXTRA) || defined(HAVE_EXT_CACHE)

/* return a new malloc'd session with default settings on success */
static WOLFSSL_SESSION* NewSession(void)
{
    WOLFSSL_SESSION* ret = NULL;

    ret = (WOLFSSL_SESSION*)XMALLOC(sizeof(WOLFSSL_SESSION), NULL,
            DYNAMIC_TYPE_OPENSSL);
    if (ret != NULL) {
        XMEMSET(ret, 0, sizeof(WOLFSSL_SESSION));
        ret->isAlloced = 1;
    }
    return ret;
}

WOLFSSL_SESSION* wolfSSL_SESSION_new(void)
{
    WOLFSSL_SESSION* ret = NewSession();

#ifdef OPENSSL_EXTRA
    if (ret != NULL) {
        if (wc_InitMutex(&ret->refMutex) != 0) {
            WOLFSSL_MSG("Error setting up session reference mutex");
            XFREE(ret, NULL, DYNAMIC_TYPE_OPENSSL);
            return NULL;
        }
        ret->refCount = 1;
    }
#endif

    return ret;
}

/* add one to session reference count
 * return WOLFSSL_SUCCESS on success and WOLFSSL_FAILURE on error */
int wolfSSL_SESSION_up_ref(WOLFSSL_SESSION* session)
{
    if (session == NULL)
        return WOLFSSL_FAILURE;

#ifdef OPENSSL_EXTRA
    if (wc_LockMutex(&session->refMutex) != 0) {
        WOLFSSL_MSG("Failed to lock session mutex");
    }
    session->refCount++;
    wc_UnLockMutex(&session->refMutex);
#endif
    return WOLFSSL_SUCCESS;
}


WOLFSSL_SESSION* wolfSSL_SESSION_dup(WOLFSSL_SESSION* session)
{
#ifdef HAVE_EXT_CACHE
    WOLFSSL_SESSION* copy;

    WOLFSSL_ENTER("wolfSSL_SESSION_dup");

    if (session == NULL)
        return NULL;
#ifdef HAVE_SESSION_TICKET
    if (session->isDynamic && !session->ticket) {
        WOLFSSL_MSG("Session dynamic flag is set but ticket pointer is null");
        return NULL;
    }
#endif

    copy = NewSession();
    if (copy != NULL) {
        XMEMCPY(copy, session, sizeof(WOLFSSL_SESSION));
        copy->isAlloced = 1;
#ifdef OPENSSL_EXTRA
        if (wc_InitMutex(&copy->refMutex) != 0) {
            WOLFSSL_MSG("Error setting up session reference mutex");
            XFREE(copy, NULL, DYNAMIC_TYPE_OPENSSL);
            return NULL;
        }
        copy->refCount = 1;
#endif
#ifdef HAVE_SESSION_TICKET
        if (session->isDynamic) {
            copy->ticket = (byte*)XMALLOC(session->ticketLen, NULL,
                                                    DYNAMIC_TYPE_SESSION_TICK);
            XMEMCPY(copy->ticket, session->ticket, session->ticketLen);
        } else {
            copy->ticket = copy->staticTicket;
        }
#endif
#if defined(SESSION_CERTS) && defined(OPENSSL_EXTRA)
        copy->peer = wolfSSL_X509_dup(session->peer);
#endif
    }
    return copy;
#else
    WOLFSSL_MSG("wolfSSL_SESSION_dup was called "
                "but HAVE_EXT_CACHE is not defined");
    (void)session;
    return NULL;
#endif /* HAVE_EXT_CACHE */
}

void FreeSession(WOLFSSL_SESSION* session, int isAlloced)
{
    if (session == NULL)
        return;

#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
    wolfSSL_CRYPTO_cleanup_ex_data(&session->ex_data);
#endif

#if defined(SESSION_CERTS) && defined(OPENSSL_EXTRA)
    if (session->peer) {
        wolfSSL_X509_free(session->peer);
        session->peer = NULL;
    }
#endif

#ifdef OPENSSL_EXTRA
    /* refCount will always be 1 or more if created externally.
     * Internal cache sessions don't initialize a refMutex. */
    if (session->refCount > 0) {
        if (wc_LockMutex(&session->refMutex) != 0) {
            WOLFSSL_MSG("Failed to lock session mutex");
        }
        if (session->refCount > 1) {
            session->refCount--;
            wc_UnLockMutex(&session->refMutex);
            return;
        }
        wc_UnLockMutex(&session->refMutex);
    }
#endif
#if defined(HAVE_EXT_CACHE) || defined(OPENSSL_EXTRA)
    if (isAlloced) {
    #ifdef HAVE_SESSION_TICKET
        if (session->isDynamic)
            XFREE(session->ticket, NULL, DYNAMIC_TYPE_SESSION_TICK);
    #endif
        XFREE(session, NULL, DYNAMIC_TYPE_OPENSSL);
    }
#else
    /* No need to free since cache is static */
    (void)session;
    (void)isAlloced;
#endif
}

void wolfSSL_SESSION_free(WOLFSSL_SESSION* session)
{
    if (session == NULL)
        return;
    
#if defined(HAVE_EXT_CACHE) || defined(OPENSSL_EXTRA)
    FreeSession(session, session->isAlloced);
#else
    FreeSession(session, 0);
#endif
}
/**
* set cipher to WOLFSSL_SESSION from WOLFSSL_CIPHER
* @param session  a pointer to WOLFSSL_SESSION structure
* @param cipher   a function pointer to WOLFSSL_CIPHER
* @return WOLFSSL_SUCCESS on success, otherwise WOLFSSL_FAILURE
*/
int wolfSSL_SESSION_set_cipher(WOLFSSL_SESSION* session, 
                                            const WOLFSSL_CIPHER* cipher)
{
    WOLFSSL_ENTER("wolfSSL_SESSION_set_cipher");
    
    /* sanity check */
    if (session == NULL || cipher == NULL) {
        WOLFSSL_MSG("bad argument");
        return WOLFSSL_FAILURE;
    }
    session->cipherSuite0 = cipher->cipherSuite0;
    session->cipherSuite  = cipher->cipherSuite;
    
    WOLFSSL_LEAVE("wolfSSL_SESSION_set_cipher", WOLFSSL_SUCCESS);
    return WOLFSSL_SUCCESS;
}
#endif /* OPENSSL_EXTRA || HAVE_EXT_CACHE */


/* helper function that takes in a protocol version struct and returns string */
static const char* wolfSSL_internal_get_version(const ProtocolVersion* version)
{
    WOLFSSL_ENTER("wolfSSL_get_version");

    if (version == NULL) {
        return "Bad arg";
    }

    if (version->major == SSLv3_MAJOR) {
        switch (version->minor) {
            case SSLv3_MINOR :
                return "SSLv3";
            case TLSv1_MINOR :
                return "TLSv1";
            case TLSv1_1_MINOR :
                return "TLSv1.1";
            case TLSv1_2_MINOR :
                return "TLSv1.2";
            case TLSv1_3_MINOR :
                return "TLSv1.3";
            default:
                return "unknown";
        }
    }
#ifdef WOLFSSL_DTLS
    else if (version->major == DTLS_MAJOR) {
        switch (version->minor) {
            case DTLS_MINOR :
                return "DTLS";
            case DTLSv1_2_MINOR :
                return "DTLSv1.2";
            default:
                return "unknown";
        }
    }
#endif /* WOLFSSL_DTLS */
    return "unknown";
}


const char* wolfSSL_get_version(const WOLFSSL* ssl)
{
    if (ssl == NULL) {
        WOLFSSL_MSG("Bad argument");
        return "unknown";
    }

    return wolfSSL_internal_get_version(&ssl->version);
}


/* current library version */
const char* wolfSSL_lib_version(void)
{
    return LIBWOLFSSL_VERSION_STRING;
}

#ifdef OPENSSL_EXTRA
#if defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x10100000L
const char* wolfSSL_OpenSSL_version(int a)
{
    (void)a;
    return "wolfSSL " LIBWOLFSSL_VERSION_STRING;
}
#else
const char* wolfSSL_OpenSSL_version(void)
{
    return "wolfSSL " LIBWOLFSSL_VERSION_STRING;
}
#endif /* WOLFSSL_QT */
#endif


/* current library version in hex */
word32 wolfSSL_lib_version_hex(void)
{
    return LIBWOLFSSL_VERSION_HEX;
}


int wolfSSL_get_current_cipher_suite(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("SSL_get_current_cipher_suite");
    if (ssl)
        return (ssl->options.cipherSuite0 << 8) | ssl->options.cipherSuite;
    return 0;
}

WOLFSSL_CIPHER* wolfSSL_get_current_cipher(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("SSL_get_current_cipher");
    if (ssl) {
        ssl->cipher.cipherSuite0 = ssl->options.cipherSuite0;
        ssl->cipher.cipherSuite  = ssl->options.cipherSuite;
        return &ssl->cipher;
    }
    else
        return NULL;
}


const char* wolfSSL_CIPHER_get_name(const WOLFSSL_CIPHER* cipher)
{
    WOLFSSL_ENTER("wolfSSL_CIPHER_get_name");

    if (cipher == NULL) {
        return NULL;
    }

    #if !defined(WOLFSSL_CIPHER_INTERNALNAME) && !defined(NO_ERROR_STRINGS) && \
        !defined(WOLFSSL_QT)
        return GetCipherNameIana(cipher->cipherSuite0, cipher->cipherSuite);
    #else
        return wolfSSL_get_cipher_name_from_suite(cipher->cipherSuite0,
                cipher->cipherSuite);
    #endif
}

const char*  wolfSSL_CIPHER_get_version(const WOLFSSL_CIPHER* cipher)
{
    WOLFSSL_ENTER("SSL_CIPHER_get_version");

    if (cipher == NULL || cipher->ssl == NULL) {
        return NULL;
    }

    return wolfSSL_get_version(cipher->ssl);
}

const char* wolfSSL_SESSION_CIPHER_get_name(WOLFSSL_SESSION* session)
{
    if (session == NULL) {
        return NULL;
    }

#if defined(SESSION_CERTS) || !defined(NO_RESUME_SUITE_CHECK) || \
                        (defined(WOLFSSL_TLS13) && defined(HAVE_SESSION_TICKET))
    #if !defined(WOLFSSL_CIPHER_INTERNALNAME) && !defined(NO_ERROR_STRINGS)
        return GetCipherNameIana(session->cipherSuite0, session->cipherSuite);
    #else
        return GetCipherNameInternal(session->cipherSuite0, session->cipherSuite);
    #endif
#else
    return NULL;
#endif
}

const char* wolfSSL_get_cipher(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_get_cipher");
    return wolfSSL_CIPHER_get_name(wolfSSL_get_current_cipher(ssl));
}

/* gets cipher name in the format DHE-RSA-... rather then TLS_DHE... */
const char* wolfSSL_get_cipher_name(WOLFSSL* ssl)
{
    /* get access to cipher_name_idx in internal.c */
    return wolfSSL_get_cipher_name_internal(ssl);
}

const char* wolfSSL_get_cipher_name_from_suite(const byte cipherSuite0,
    const byte cipherSuite)
{
    return GetCipherNameInternal(cipherSuite0, cipherSuite);
}

const char* wolfSSL_get_cipher_name_iana_from_suite(const byte cipherSuite0,
        const byte cipherSuite)
{
    return GetCipherNameIana(cipherSuite0, cipherSuite);
}

int wolfSSL_get_cipher_suite_from_name(const char* name, byte* cipherSuite0,
                                       byte* cipherSuite, int *flags) {
    if ((name == NULL) ||
        (cipherSuite0 == NULL) ||
        (cipherSuite == NULL) ||
        (flags == NULL))
        return BAD_FUNC_ARG;
    return GetCipherSuiteFromName(name, cipherSuite0, cipherSuite, flags);
}


#if defined(WOLFSSL_QT) || defined(OPENSSL_ALL)
/* Creates and returns a new WOLFSSL_CIPHER stack. */
WOLFSSL_STACK* wolfSSL_sk_new_cipher(void)
{
    WOLFSSL_STACK* sk;
    WOLFSSL_ENTER("wolfSSL_sk_new_cipher");

    sk = wolfSSL_sk_new_null();
    if (sk == NULL)
        return NULL;
    sk->type = STACK_TYPE_CIPHER;

    return sk;
}

/* return 1 on success 0 on fail */
int wolfSSL_sk_CIPHER_push(WOLF_STACK_OF(WOLFSSL_CIPHER)* sk,
                                                      WOLFSSL_CIPHER* cipher)
{
    return wolfSSL_sk_push(sk, cipher);
}

#ifndef NO_WOLFSSL_STUB
WOLFSSL_CIPHER* wolfSSL_sk_CIPHER_pop(WOLF_STACK_OF(WOLFSSL_CIPHER)* sk)
{
    WOLFSSL_STUB("wolfSSL_sk_CIPHER_pop");
    (void)sk;
    return NULL;
}
#endif /* NO_WOLFSSL_STUB */
#endif /* WOLFSSL_QT || OPENSSL_ALL */

word32 wolfSSL_CIPHER_get_id(const WOLFSSL_CIPHER* cipher)
{
    word16 cipher_id = 0;

    WOLFSSL_ENTER("SSL_CIPHER_get_id");

    if (cipher && cipher->ssl) {
        cipher_id = (cipher->ssl->options.cipherSuite0 << 8) |
                     cipher->ssl->options.cipherSuite;
    }

    return cipher_id;
}

const WOLFSSL_CIPHER* wolfSSL_get_cipher_by_value(word16 value)
{
    const WOLFSSL_CIPHER* cipher = NULL;
    byte cipherSuite0, cipherSuite;
    WOLFSSL_ENTER("SSL_get_cipher_by_value");

    /* extract cipher id information */
    cipherSuite =   (value       & 0xFF);
    cipherSuite0 = ((value >> 8) & 0xFF);

    /* TODO: lookup by cipherSuite0 / cipherSuite */
    (void)cipherSuite0;
    (void)cipherSuite;

    return cipher;
}


#if defined(OPENSSL_ALL)
/* Free the structure for WOLFSSL_CIPHER stack
 *
 * sk  stack to free nodes in
 */
void wolfSSL_sk_CIPHER_free(WOLF_STACK_OF(WOLFSSL_CIPHER)* sk)
{
    WOLFSSL_STACK* node;
    WOLFSSL_STACK* tmp;
    WOLFSSL_ENTER("wolfSSL_sk_CIPHER_free");

    if (sk == NULL)
        return;

    /* parse through stack freeing each node */
    node = sk->next;
    while (node) {
        tmp  = node;
        node = node->next;
        XFREE(tmp, NULL, DYNAMIC_TYPE_OPENSSL);
    }

    /* free head of stack */
    XFREE(sk, NULL, DYNAMIC_TYPE_ASN1);
}
#endif /* OPENSSL_ALL */

#if defined(HAVE_ECC) || defined(HAVE_CURVE25519) || defined(HAVE_CURVE448) || \
                                                                 !defined(NO_DH)
#ifdef HAVE_FFDHE
static const char* wolfssl_ffdhe_name(word16 group)
{
    const char* str = NULL;
    switch (group) {
        case WOLFSSL_FFDHE_2048:
            str = "FFDHE_2048";
            break;
        case WOLFSSL_FFDHE_3072:
            str = "FFDHE_3072";
            break;
        case WOLFSSL_FFDHE_4096:
            str = "FFDHE_4096";
            break;
        case WOLFSSL_FFDHE_6144:
            str = "FFDHE_6144";
            break;
        case WOLFSSL_FFDHE_8192:
            str = "FFDHE_8192";
            break;
        default:
            break;
    }
    return str;
}
#endif
/* Return the name of the curve used for key exchange as a printable string.
 *
 * ssl  The SSL/TLS object.
 * returns NULL if ECDH was not used, otherwise the name as a string.
 */
const char* wolfSSL_get_curve_name(WOLFSSL* ssl)
{
    const char* cName = NULL;

    if (ssl == NULL)
        return NULL;

#ifdef HAVE_FFDHE
    if (ssl->namedGroup != 0) {
        cName = wolfssl_ffdhe_name(ssl->namedGroup);
    }
#endif

#ifdef HAVE_CURVE25519
    if (ssl->ecdhCurveOID == ECC_X25519_OID && cName == NULL) {
        cName = "X25519";
    }
#endif

#ifdef HAVE_CURVE448
    if (ssl->ecdhCurveOID == ECC_X448_OID && cName == NULL) {
        cName = "X448";
    }
#endif

#ifdef HAVE_ECC
    if (ssl->ecdhCurveOID != 0 && cName == NULL) {
        cName = wc_ecc_get_name(wc_ecc_get_oid(ssl->ecdhCurveOID, NULL,
                                NULL));
    }
#endif

    return cName;
}
#endif


#if defined(OPENSSL_EXTRA_X509_SMALL) || defined(KEEP_PEER_CERT) || \
    defined(SESSION_CERTS)
/* Smaller subset of X509 compatibility functions. Avoid increasing the size of
 * this subset and its memory usage */

#if !defined(NO_CERTS)
/* returns a pointer to a new WOLFSSL_X509 structure on success and NULL on
 * fail
 */
WOLFSSL_X509* wolfSSL_X509_new(void)
{
    WOLFSSL_X509* x509;

    x509 = (WOLFSSL_X509*)XMALLOC(sizeof(WOLFSSL_X509), NULL,
            DYNAMIC_TYPE_X509);
    if (x509 != NULL) {
        InitX509(x509, 1, NULL);
    }

    return x509;
}

WOLFSSL_ABI
WOLFSSL_X509_NAME* wolfSSL_X509_get_subject_name(WOLFSSL_X509* cert)
{
    WOLFSSL_ENTER("wolfSSL_X509_get_subject_name");
    if (cert)
        return &cert->subject;
    return NULL;
}

#if defined(OPENSSL_EXTRA) && (!defined(NO_SHA) || !defined(NO_SHA256))
/******************************************************************************
* wolfSSL_X509_subject_name_hash - compute the hash digest of the raw subject name
* This function prefers SHA-1 (if available) for compatibility
*
* RETURNS:
* The beginning of the hash digest. Otherwise, returns zero.
* Note:
* Returns a different hash value from OpenSSL's X509_subject_name_hash() API
* depending on the subject name.
*/
unsigned long wolfSSL_X509_subject_name_hash(const WOLFSSL_X509* x509)
{
    unsigned long ret = 0;
    int retHash = NOT_COMPILED_IN;
    WOLFSSL_X509_NAME *subjectName = NULL;
    byte digest[WC_MAX_DIGEST_SIZE];

    if (x509 == NULL) {
        return ret;
    }

    subjectName = wolfSSL_X509_get_subject_name((WOLFSSL_X509*)x509);
    if (subjectName != NULL) {
    #ifndef NO_SHA
        retHash = wc_ShaHash((const byte*)subjectName->name,
                             (word32)subjectName->sz, digest);
    #elif !defined(NO_SHA256)
        retHash = wc_Sha256Hash((const byte*)subjectName->name,
                                (word32)subjectName->sz, digest);
    #endif
        if (retHash == 0) {
            ret = (unsigned long)MakeWordFromHash(digest);
        }
    }

    return ret;
}

unsigned long wolfSSL_X509_issuer_name_hash(const WOLFSSL_X509* x509)
{
    unsigned long ret = 0;
    int retHash = NOT_COMPILED_IN;
    WOLFSSL_X509_NAME *issuerName = NULL;
    byte digest[WC_MAX_DIGEST_SIZE];

    if (x509 == NULL) {
        return ret;
    }

    issuerName = wolfSSL_X509_get_issuer_name((WOLFSSL_X509*)x509);
    if (issuerName != NULL) {
    #ifndef NO_SHA
        retHash = wc_ShaHash((const byte*)issuerName->name,
                             (word32)issuerName->sz, digest);
    #elif !defined(NO_SHA256)
        retHash = wc_Sha256Hash((const byte*)issuerName->name,
                                (word32)issuerName->sz, digest);
    #endif
        if (retHash == 0) {
            ret = (unsigned long)MakeWordFromHash(digest);
        }
    }
    return ret;
}
#endif /* OPENSSL_EXTRA && (!NO_SHA || !NO_SHA256) */

WOLFSSL_ABI
WOLFSSL_X509_NAME* wolfSSL_X509_get_issuer_name(WOLFSSL_X509* cert)
{
    WOLFSSL_ENTER("X509_get_issuer_name");
    if (cert && cert->issuer.sz != 0)
        return &cert->issuer;
    return NULL;
}


int wolfSSL_X509_get_signature_type(WOLFSSL_X509* x509)
{
    int type = 0;

    WOLFSSL_ENTER("wolfSSL_X509_get_signature_type");

    if (x509 != NULL)
        type = x509->sigOID;

    return type;
}

#if defined(OPENSSL_EXTRA_X509_SMALL)

/* Searches for the first ENTRY of type NID
 * idx is the location to start searching from, the value at when the entry was
 *     found is stored into idx
 * returns a pointer to the entry on success and null on fail */
static WOLFSSL_X509_NAME_ENTRY* GetEntryByNID(WOLFSSL_X509_NAME* name, int nid,
        int* idx)
{
    int i;
    WOLFSSL_X509_NAME_ENTRY* ret = NULL;

    /* and index of less than 0 is assumed to be starting from 0 */
    if (*idx < 0) {
        *idx = 0;
    }

    for (i = *idx; i < MAX_NAME_ENTRIES; i++) {
        if (name->entry[i].nid == nid) {
            ret = &name->entry[i];
            *idx = i;
            break;
        }
    }
    return ret;
}


/* Used to get a string from the WOLFSSL_X509_NAME structure that
 * corresponds with the NID value passed in. This finds the first entry with
 * matching NID value, if searching for the case where there is multiple
 * entries with the same NID value than other functions should be used
 * (i.e. wolfSSL_X509_NAME_get_index_by_NID, wolfSSL_X509_NAME_get_entry)
 *
 * name structure to get string from
 * nid  NID value to search for
 * buf  [out] buffer to hold results. If NULL then the buffer size minus the
 *      null char is returned.
 * len  size of "buf" passed in
 *
 * returns the length of string found, not including the NULL terminator.
 *         It's possible the function could return a negative value in the
 *         case that len is less than or equal to 0. A negative value is
 *         considered an error case.
 */
int wolfSSL_X509_NAME_get_text_by_NID(WOLFSSL_X509_NAME* name,
                                      int nid, char* buf, int len)
{
    WOLFSSL_X509_NAME_ENTRY* e;
    unsigned char *text = NULL;
    int textSz = 0;
    int idx    = 0;

    WOLFSSL_ENTER("wolfSSL_X509_NAME_get_text_by_NID");

    if (name == NULL) {
        WOLFSSL_MSG("NULL argument passed in");
        return WOLFSSL_FATAL_ERROR;
    }

    e = GetEntryByNID(name, nid, &idx);
    if (e == NULL) {
        WOLFSSL_MSG("Entry type not found");
        return WOLFSSL_FATAL_ERROR;
    }
    text   = wolfSSL_ASN1_STRING_data(e->value);
    textSz = wolfSSL_ASN1_STRING_length(e->value);

    if (text == NULL) {
        WOLFSSL_MSG("Unable to get entry text");
        return WOLFSSL_FATAL_ERROR;
    }

    /* if buf is NULL return size of buffer needed (minus null char) */
    if (buf == NULL) {
        WOLFSSL_MSG("Buffer is NULL, returning buffer size only");
        return textSz;
    }

    /* buf is not NULL from above */
    if (text != NULL) {
        textSz = min(textSz + 1, len); /* + 1 to account for null char */
        if (textSz > 0) {
            XMEMCPY(buf, text, textSz - 1);
            buf[textSz - 1] = '\0';
        }
    }

    WOLFSSL_LEAVE("wolfSSL_X509_NAME_get_text_by_NID", textSz);
    return (textSz - 1); /* do not include null character in size */
}

/* Creates a new WOLFSSL_EVP_PKEY structure that has the public key from x509
 *
 * returns a pointer to the created WOLFSSL_EVP_PKEY on success and NULL on fail
 */
WOLFSSL_EVP_PKEY* wolfSSL_X509_get_pubkey(WOLFSSL_X509* x509)
{
    WOLFSSL_EVP_PKEY* key = NULL;
    WOLFSSL_ENTER("X509_get_pubkey");
    if (x509 != NULL) {
        key = wolfSSL_EVP_PKEY_new_ex(x509->heap);
        if (key != NULL) {
            if (x509->pubKeyOID == RSAk) {
                key->type = EVP_PKEY_RSA;
            }
            else if (x509->pubKeyOID == DSAk) {
                key->type = EVP_PKEY_DSA;
            }
            else {
                key->type = EVP_PKEY_EC;
            }
            key->save_type = 0;
            key->pkey.ptr = (char*)XMALLOC(
                        x509->pubKey.length, x509->heap,
                                                       DYNAMIC_TYPE_PUBLIC_KEY);
            if (key->pkey.ptr == NULL) {
                wolfSSL_EVP_PKEY_free(key);
                return NULL;
            }
            XMEMCPY(key->pkey.ptr, x509->pubKey.buffer, x509->pubKey.length);
            key->pkey_sz = x509->pubKey.length;

            #ifdef HAVE_ECC
                key->pkey_curve = (int)x509->pkCurveOID;
            #endif /* HAVE_ECC */

            /* decode RSA key */
            #ifndef NO_RSA
            if (key->type == EVP_PKEY_RSA) {
                key->ownRsa = 1;
                key->rsa = wolfSSL_RSA_new();
                if (key->rsa == NULL) {
                    wolfSSL_EVP_PKEY_free(key);
                    return NULL;
                }

                if (wolfSSL_RSA_LoadDer_ex(key->rsa,
                            (const unsigned char*)key->pkey.ptr, key->pkey_sz,
                            WOLFSSL_RSA_LOAD_PUBLIC) != WOLFSSL_SUCCESS) {
                    wolfSSL_EVP_PKEY_free(key);
                    return NULL;
                }
            }
            #endif /* NO_RSA */

            /* decode ECC key */
            #if defined(HAVE_ECC) && defined(OPENSSL_EXTRA)
            if (key->type == EVP_PKEY_EC) {
                word32 idx = 0;

                key->ownEcc = 1;
                key->ecc = wolfSSL_EC_KEY_new();
                if (key->ecc == NULL || key->ecc->internal == NULL) {
                    wolfSSL_EVP_PKEY_free(key);
                    return NULL;
                }

                /* not using wolfSSL_EC_KEY_LoadDer because public key in x509
                 * is in the format of x963 (no sequence at start of buffer) */
                if (wc_EccPublicKeyDecode((const unsigned char*)key->pkey.ptr,
                        &idx, (ecc_key*)key->ecc->internal, key->pkey_sz) < 0) {
                    WOLFSSL_MSG("wc_EccPublicKeyDecode failed");
                    wolfSSL_EVP_PKEY_free(key);
                    return NULL;
                }

                if (SetECKeyExternal(key->ecc) != WOLFSSL_SUCCESS) {
                    WOLFSSL_MSG("SetECKeyExternal failed");
                    wolfSSL_EVP_PKEY_free(key);
                    return NULL;
                }

                key->ecc->inSet = 1;
            }
            #endif /* HAVE_ECC */

            #ifndef NO_DSA
            if (key->type == EVP_PKEY_DSA) {
                key->ownDsa = 1;
                key->dsa = wolfSSL_DSA_new();
                if (key->dsa == NULL) {
                    wolfSSL_EVP_PKEY_free(key);
                    return NULL;
                }

                if (wolfSSL_DSA_LoadDer_ex(key->dsa,
                            (const unsigned char*)key->pkey.ptr, key->pkey_sz, \
                            WOLFSSL_DSA_LOAD_PUBLIC) != WOLFSSL_SUCCESS) {
                    wolfSSL_DSA_free(key->dsa);
                    key->dsa = NULL;
                    wolfSSL_EVP_PKEY_free(key);
                    return NULL;
                }
            }
            #endif /* NO_DSA */
        }
    }
    return key;
}
#endif /* OPENSSL_EXTRA_X509_SMALL */
#endif /* !NO_CERTS */

/* End of smaller subset of X509 compatibility functions. Avoid increasing the
 * size of this subset and its memory usage */
#endif /* OPENSSL_EXTRA_X509_SMALL || KEEP_PEER_CERT || SESSION_CERTS */

#if defined(OPENSSL_ALL)
/* Takes two WOLFSSL_X509* certificates and performs a Sha hash of each, if the
   * hash values are the same, then it will do an XMEMCMP to confirm they are
   * identical. Returns a 0 when certificates match, returns a negative number
   * when certificates are not a match.
*/
int wolfSSL_X509_cmp(const WOLFSSL_X509 *a, const WOLFSSL_X509 *b)
{
        const byte* derA;
        const byte* derB;
        int outSzA = 0;
        int outSzB = 0;

        if (a == NULL || b == NULL){
            return BAD_FUNC_ARG;
        }

        derA = wolfSSL_X509_get_der((WOLFSSL_X509*)a, &outSzA);
        if (derA == NULL){
            WOLFSSL_MSG("wolfSSL_X509_get_der - certificate A has failed");
            return WOLFSSL_FATAL_ERROR;
        }
        derB = wolfSSL_X509_get_der((WOLFSSL_X509*)b, &outSzB);
        if (derB == NULL){
            WOLFSSL_MSG("wolfSSL_X509_get_der - certificate B has failed");
            return WOLFSSL_FATAL_ERROR;
        }

        if (outSzA != outSzB || XMEMCMP(derA, derB, outSzA) != 0) {
            WOLFSSL_LEAVE("wolfSSL_X509_cmp", WOLFSSL_FATAL_ERROR);
            return WOLFSSL_FATAL_ERROR;
        }

        WOLFSSL_LEAVE("wolfSSL_X509_cmp", 0);
        return 0;
    }
#endif /* OPENSSL_ALL */

#if defined(OPENSSL_EXTRA) && !defined(NO_CERTS)
    int wolfSSL_X509_ext_isSet_by_NID(WOLFSSL_X509* x509, int nid)
    {
        int isSet = 0;

        WOLFSSL_ENTER("wolfSSL_X509_ext_isSet_by_NID");

        if (x509 != NULL) {
            switch (nid) {
                case BASIC_CA_OID: isSet = x509->basicConstSet; break;
                case ALT_NAMES_OID: isSet = x509->subjAltNameSet; break;
                case AUTH_KEY_OID: isSet = x509->authKeyIdSet; break;
                case SUBJ_KEY_OID: isSet = x509->subjKeyIdSet; break;
                case KEY_USAGE_OID: isSet = x509->keyUsageSet; break;
                case CRL_DIST_OID: isSet = x509->CRLdistSet; break;
                case EXT_KEY_USAGE_OID: isSet = ((x509->extKeyUsageSrc) ? 1 : 0);
                    break;
                case AUTH_INFO_OID: isSet = x509->authInfoSet; break;
                #if defined(WOLFSSL_SEP) || defined(WOLFSSL_QT)
                    case CERT_POLICY_OID: isSet = x509->certPolicySet; break;
                #endif /* WOLFSSL_SEP || WOLFSSL_QT */
                default:
                    WOLFSSL_MSG("NID not in table");
            }
        }

        WOLFSSL_LEAVE("wolfSSL_X509_ext_isSet_by_NID", isSet);

        return isSet;
    }


    int wolfSSL_X509_ext_get_critical_by_NID(WOLFSSL_X509* x509, int nid)
    {
        int crit = 0;

        WOLFSSL_ENTER("wolfSSL_X509_ext_get_critical_by_NID");

        if (x509 != NULL) {
            switch (nid) {
                case BASIC_CA_OID: crit = x509->basicConstCrit; break;
                case ALT_NAMES_OID: crit = x509->subjAltNameCrit; break;
                case AUTH_KEY_OID: crit = x509->authKeyIdCrit; break;
                case SUBJ_KEY_OID: crit = x509->subjKeyIdCrit; break;
                case KEY_USAGE_OID: crit = x509->keyUsageCrit; break;
                case CRL_DIST_OID: crit= x509->CRLdistCrit; break;
                #if defined(WOLFSSL_SEP) || defined(WOLFSSL_QT)
                    case CERT_POLICY_OID: crit = x509->certPolicyCrit; break;
                #endif /* WOLFSSL_SEP || WOLFSSL_QT */
            }
        }

        WOLFSSL_LEAVE("wolfSSL_X509_ext_get_critical_by_NID", crit);

        return crit;
    }


    int wolfSSL_X509_get_isSet_pathLength(WOLFSSL_X509* x509)
    {
        int isSet = 0;

        WOLFSSL_ENTER("wolfSSL_X509_get_isSet_pathLength");

        if (x509 != NULL)
            isSet = x509->basicConstPlSet;

        WOLFSSL_LEAVE("wolfSSL_X509_get_isSet_pathLength", isSet);

        return isSet;
    }


    word32 wolfSSL_X509_get_pathLength(WOLFSSL_X509* x509)
    {
        word32 pathLength = 0;

        WOLFSSL_ENTER("wolfSSL_X509_get_pathLength");

        if (x509 != NULL)
            pathLength = x509->pathLength;

        WOLFSSL_LEAVE("wolfSSL_X509_get_pathLength", pathLength);

        return pathLength;
    }


    unsigned int wolfSSL_X509_get_keyUsage(WOLFSSL_X509* x509)
    {
        word16 usage = 0;

        WOLFSSL_ENTER("wolfSSL_X509_get_keyUsage");

        if (x509 != NULL)
            usage = x509->keyUsage;

        WOLFSSL_LEAVE("wolfSSL_X509_get_keyUsage", usage);

        return usage;
    }


    byte* wolfSSL_X509_get_authorityKeyID(WOLFSSL_X509* x509,
                                          byte* dst, int* dstLen)
    {
        byte *id = NULL;
        int copySz = 0;

        WOLFSSL_ENTER("wolfSSL_X509_get_authorityKeyID");

        if (x509 != NULL) {
            if (x509->authKeyIdSet) {
                copySz = min(dstLen != NULL ? *dstLen : 0,
                             (int)x509->authKeyIdSz);
                id = x509->authKeyId;
            }

            if (dst != NULL && dstLen != NULL && id != NULL && copySz > 0) {
                XMEMCPY(dst, id, copySz);
                id = dst;
                *dstLen = copySz;
            }
        }

        WOLFSSL_LEAVE("wolfSSL_X509_get_authorityKeyID", copySz);

        return id;
    }


    byte* wolfSSL_X509_get_subjectKeyID(WOLFSSL_X509* x509,
                                        byte* dst, int* dstLen)
    {
        byte *id = NULL;
        int copySz = 0;

        WOLFSSL_ENTER("wolfSSL_X509_get_subjectKeyID");

        if (x509 != NULL) {
            if (x509->subjKeyIdSet) {
                copySz = min(dstLen != NULL ? *dstLen : 0,
                                                        (int)x509->subjKeyIdSz);
                id = x509->subjKeyId;
            }

            if (dst != NULL && dstLen != NULL && id != NULL && copySz > 0) {
                XMEMCPY(dst, id, copySz);
                id = dst;
                *dstLen = copySz;
            }
        }

        WOLFSSL_LEAVE("wolfSSL_X509_get_subjectKeyID", copySz);

        return id;
    }
#endif /* !NO_CERTS && OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL) || \
    defined(OPENSSL_EXTRA_X509_SMALL)

    /* Looks up the index of the first entry encountered with matching NID
     * The search starts from index 'pos'
     * returns a negative value on failure and positive index value on success*/
    int wolfSSL_X509_NAME_get_index_by_NID(WOLFSSL_X509_NAME* name,
                                          int nid, int pos)
    {
        int value = nid, i;

        WOLFSSL_ENTER("wolfSSL_X509_NAME_get_index_by_NID");

        if (name == NULL) {
            return BAD_FUNC_ARG;
        }

        i = pos + 1; /* start search after index passed in */
        if (i < 0) {
            i = 0;
        }

        for (;i < name->entrySz && i < MAX_NAME_ENTRIES; i++) {
            if (name->entry[i].nid == value) {
                return i;
            }
        }
        return WOLFSSL_FATAL_ERROR;
    }


    WOLFSSL_ASN1_STRING*  wolfSSL_X509_NAME_ENTRY_get_data(
                                                    WOLFSSL_X509_NAME_ENTRY* in)
    {
        WOLFSSL_ENTER("wolfSSL_X509_NAME_ENTRY_get_data");
        if (in == NULL)
            return NULL;

        return in->value;
    }


    /* Creates a new WOLFSSL_ASN1_STRING structure.
     *
     * returns a pointer to the new structure created on success or NULL if fail
     */
    WOLFSSL_ASN1_STRING* wolfSSL_ASN1_STRING_new(void)
    {
        WOLFSSL_ASN1_STRING* asn1;

        WOLFSSL_ENTER("wolfSSL_ASN1_STRING_new");

        asn1 = (WOLFSSL_ASN1_STRING*)XMALLOC(sizeof(WOLFSSL_ASN1_STRING), NULL,
                DYNAMIC_TYPE_OPENSSL);
        if (asn1 != NULL) {
            XMEMSET(asn1, 0, sizeof(WOLFSSL_ASN1_STRING));
        }

        return asn1; /* no check for null because error case is returning null*/
    }

    /**
     * Used to duplicate a passed in WOLFSSL_ASN1_STRING*
     * @param asn1 WOLFSSL_ASN1_STRING* to be duplicated
     * @return WOLFSSL_ASN1_STRING* the duplicate struct or NULL on error
     */
    WOLFSSL_ASN1_STRING* wolfSSL_ASN1_STRING_dup(WOLFSSL_ASN1_STRING* asn1)
    {
        WOLFSSL_ASN1_STRING* dupl = NULL;

        WOLFSSL_ENTER("wolfSSL_ASN1_STRING_dup");
        if (!asn1) {
            WOLFSSL_MSG("Bad parameter");
            return NULL;
        }

        dupl = wolfSSL_ASN1_STRING_new();
        if (!dupl) {
            WOLFSSL_MSG("wolfSSL_ASN1_STRING_new error");
            return NULL;
        }

        dupl->type = asn1->type;
        dupl->flags = asn1->flags;

        if (wolfSSL_ASN1_STRING_set(dupl, asn1->data, asn1->length)
                != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("wolfSSL_ASN1_STRING_set error");
            wolfSSL_ASN1_STRING_free(dupl);
            return NULL;
        }

        return dupl;
    }


    /* used to free a WOLFSSL_ASN1_STRING structure */
    void wolfSSL_ASN1_STRING_free(WOLFSSL_ASN1_STRING* asn1)
    {
        WOLFSSL_ENTER("wolfSSL_ASN1_STRING_free");

        if (asn1 != NULL) {
            if (asn1->length > 0 && asn1->data != NULL && asn1->isDynamic) {
                XFREE(asn1->data, NULL, DYNAMIC_TYPE_OPENSSL);
            }
            XFREE(asn1, NULL, DYNAMIC_TYPE_OPENSSL);
        }
    }

    int wolfSSL_ASN1_STRING_cmp(const WOLFSSL_ASN1_STRING *a, const WOLFSSL_ASN1_STRING *b)
    {
        int i;
        WOLFSSL_ENTER("wolfSSL_ASN1_STRING_cmp");

        if (!a || !b) {
            return WOLFSSL_FATAL_ERROR;
        }

        if (a->length != b->length) {
            return a->length - b->length;
        }

        if ((i = XMEMCMP(a->data, b->data, a->length)) != 0) {
            return i;
        }

        return a->type - b->type;
    }
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#if !defined(NO_CERTS) && (defined(OPENSSL_EXTRA) || \
    defined(OPENSSL_EXTRA_X509_SMALL))

    int wolfSSL_ASN1_STRING_copy(WOLFSSL_ASN1_STRING* dest, 
                            const WOLFSSL_ASN1_STRING* src)
    {
        if (src == NULL || dest == NULL) {
            return WOLFSSL_FAILURE;
        }
        dest->type = src->type;
        if(wolfSSL_ASN1_STRING_set(dest, src->data, src->length) 
                    != WOLFSSL_SUCCESS) {
                return WOLFSSL_FAILURE;
        }
        dest->flags = src->flags;

        return WOLFSSL_SUCCESS;
    }
    /* Creates a new WOLFSSL_ASN1_STRING structure given the input type.
     *
     * type is the type of set when WOLFSSL_ASN1_STRING is created
     *
     * returns a pointer to the new structure created on success or NULL if fail
     */
    WOLFSSL_ASN1_STRING* wolfSSL_ASN1_STRING_type_new(int type)
    {
        WOLFSSL_ASN1_STRING* asn1;

        WOLFSSL_ENTER("wolfSSL_ASN1_STRING_type_new");

        asn1 = wolfSSL_ASN1_STRING_new();
        if (asn1 == NULL) {
            return NULL;
        }
        asn1->type = type;

        return asn1;
    }


/******************************************************************************
* wolfSSL_ASN1_STRING_type - returns the type of <asn1>
*
* RETURNS:
* returns the type set for <asn1>. Otherwise, returns WOLFSSL_FAILURE.
*/
    int wolfSSL_ASN1_STRING_type(const WOLFSSL_ASN1_STRING* asn1)
    {

        WOLFSSL_ENTER("wolfSSL_ASN1_STRING_type");

        if (asn1 == NULL) {
            return WOLFSSL_FAILURE;
        }

        return asn1->type;
    }

#endif /* !NO_CERTS && OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL) || \
    defined(OPENSSL_EXTRA_X509_SMALL)
    /* if dataSz is negative then use XSTRLEN to find length of data
     * return WOLFSSL_SUCCESS on success and WOLFSSL_FAILURE on failure */
    /* `data` can be NULL and only buffer will be allocated */
    int wolfSSL_ASN1_STRING_set(WOLFSSL_ASN1_STRING* asn1, const void* data,
            int dataSz)
    {
        int sz;

        WOLFSSL_ENTER("wolfSSL_ASN1_STRING_set");

        if (asn1 == NULL || (data == NULL && dataSz < 0)) {
            return WOLFSSL_FAILURE;
        }

        if (dataSz < 0) {
            sz = (int)XSTRLEN((const char*)data);
        }
        else {
            sz = dataSz;
        }

        if (sz < 0) {
            return WOLFSSL_FAILURE;
        }

        /* free any existing data before copying */
        if (asn1->data != NULL && asn1->isDynamic) {
            XFREE(asn1->data, NULL, DYNAMIC_TYPE_OPENSSL);
            asn1->data = NULL;
        }

        if (sz + 1 > CTC_NAME_SIZE) { /* account for null char */
            /* create new data buffer and copy over */
            asn1->data = (char*)XMALLOC(sz + 1, NULL, DYNAMIC_TYPE_OPENSSL);
            if (asn1->data == NULL) {
                return WOLFSSL_FAILURE;
            }
            asn1->isDynamic = 1;
        }
        else {
            XMEMSET(asn1->strData, 0, CTC_NAME_SIZE);
            asn1->data = asn1->strData;
            asn1->isDynamic = 0;
        }
        if (data != NULL) {
            XMEMCPY(asn1->data, data, sz);
            asn1->data[sz] = '\0';
        }
        asn1->length = sz;

        return WOLFSSL_SUCCESS;
    }
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#ifndef NO_CERTS
#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
    const unsigned char* wolfSSL_ASN1_STRING_get0_data(
                                            const WOLFSSL_ASN1_STRING* asn)
    {
        WOLFSSL_ENTER("wolfSSL_ASN1_STRING_get0_data");
        
        if (asn) {
            return (const unsigned char*)asn->data;
        } else {
            return NULL;
        }
    }

    unsigned char* wolfSSL_ASN1_STRING_data(WOLFSSL_ASN1_STRING* asn)
    {
        WOLFSSL_ENTER("wolfSSL_ASN1_STRING_data");

        if (asn) {
            return (unsigned char*)asn->data;
        }
        else {
            return NULL;
        }
    }


    int wolfSSL_ASN1_STRING_length(WOLFSSL_ASN1_STRING* asn)
    {
        WOLFSSL_ENTER("wolfSSL_ASN1_STRING_length");

        if (asn) {
            return asn->length;
        }
        else {
            return 0;
        }
    }
#endif /* OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL */

#ifdef OPENSSL_EXTRA
#ifndef NO_WOLFSSL_STUB
    WOLFSSL_ASN1_STRING* wolfSSL_d2i_DISPLAYTEXT(WOLFSSL_ASN1_STRING **asn,
                                             const unsigned char **in, long len)
    {
        WOLFSSL_STUB("d2i_DISPLAYTEXT");
        (void)asn;
        (void)in;
        (void)len;
        return NULL;
    }
#endif

#ifndef NO_BIO
#ifdef XSNPRINTF /* a snprintf function needs to be available */
    /* Writes the human readable form of x509 to bio.
     *
     * bio  WOLFSSL_BIO to write to.
     * x509 Certificate to write.
     *
     * returns WOLFSSL_SUCCESS on success and WOLFSSL_FAILURE on failure
     */
    int wolfSSL_X509_print_ex(WOLFSSL_BIO* bio, WOLFSSL_X509* x509,
        unsigned long nmflags, unsigned long cflag)
    {
        WOLFSSL_ENTER("wolfSSL_X509_print_ex");

        /* flags currently not supported */
        (void)nmflags;
        (void)cflag;

        if (bio == NULL || x509 == NULL) {
            return WOLFSSL_FAILURE;
        }

        if (wolfSSL_BIO_write(bio, "Certificate:\n",
                      (int)XSTRLEN("Certificate:\n")) <= 0) {
                return WOLFSSL_FAILURE;
        }

        if (wolfSSL_BIO_write(bio, "    Data:\n",
                      (int)XSTRLEN("    Data:\n")) <= 0) {
                return WOLFSSL_FAILURE;
        }

        /* print version of cert */
        {
            int version;
            char tmp[20];

            if ((version = wolfSSL_X509_version(x509)) < 0) {
                WOLFSSL_MSG("Error getting X509 version");
                return WOLFSSL_FAILURE;
            }
            if (wolfSSL_BIO_write(bio, "        Version:",
                          (int)XSTRLEN("        Version:")) <= 0) {
                return WOLFSSL_FAILURE;
            }
            XSNPRINTF(tmp, sizeof(tmp), " %d (0x%x)\n", version, (byte)version-1);
            if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
                return WOLFSSL_FAILURE;
            }
        }

        /* print serial number out */
        {
            unsigned char serial[32];
            int  sz = sizeof(serial);

            XMEMSET(serial, 0, sz);
            if (wolfSSL_X509_get_serial_number(x509, serial, &sz)
                    != WOLFSSL_SUCCESS) {
                WOLFSSL_MSG("Error getting x509 serial number");
                return WOLFSSL_FAILURE;
            }
            if (wolfSSL_BIO_write(bio, "        Serial Number:",
                          (int)XSTRLEN("        Serial Number:")) <= 0) {
                return WOLFSSL_FAILURE;
            }

            /* if serial can fit into byte than print on the same line */
            if (sz <= (int)sizeof(byte)) {
                char tmp[17];
                XSNPRINTF(tmp, sizeof(tmp), " %d (0x%x)\n", serial[0],serial[0]);
                if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
                    return WOLFSSL_FAILURE;
                }
            }
            else {
                int i;
                char tmp[100];
                int  tmpSz = 100;
                char val[5];
                int  valSz = 5;

                /* serial is larger than int size so print off hex values */
                if (wolfSSL_BIO_write(bio, "\n            ",
                              (int)XSTRLEN("\n            ")) <= 0) {
                    return WOLFSSL_FAILURE;
                }
                tmp[0] = '\0';
                for (i = 0; i < sz - 1 && (3 * i) < tmpSz - valSz; i++) {
                    XSNPRINTF(val, sizeof(val) - 1, "%02x:", serial[i]);
                    val[3] = '\0'; /* make sure is null terminated */
                    XSTRNCAT(tmp, val, valSz);
                }
                XSNPRINTF(val, sizeof(val) - 1, "%02x\n", serial[i]);
                val[3] = '\0'; /* make sure is null terminated */
                XSTRNCAT(tmp, val, valSz);
                if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
                    return WOLFSSL_FAILURE;
                }
            }
        }

        /* print signature algo */
        {
            int oid;
            const char* sig;

            if ((oid = wolfSSL_X509_get_signature_type(x509)) <= 0) {
                WOLFSSL_MSG("Error getting x509 signature type");
                return WOLFSSL_FAILURE;
            }
            if (wolfSSL_BIO_write(bio, "        Signature Algorithm: ",
                          (int)XSTRLEN("        Signature Algorithm: ")) <= 0) {
                return WOLFSSL_FAILURE;
            }
            sig = GetSigName(oid);
            if (wolfSSL_BIO_write(bio, sig, (int)XSTRLEN(sig)) <= 0) {
                return WOLFSSL_FAILURE;
            }
            if (wolfSSL_BIO_write(bio, "\n", (int)XSTRLEN("\n")) <= 0) {
                return WOLFSSL_FAILURE;
            }
        }

        /* print issuer */
        {
            char* issuer;
        #ifdef WOLFSSL_SMALL_STACK
            char* buff  = NULL;
            int   issSz = 0;
        #else
            char buff[256];
            int  issSz = 256;
        #endif

        #if defined(WOLFSSL_QT)
            issuer = wolfSSL_X509_get_name_oneline(
                               wolfSSL_X509_get_issuer_name(x509), buff, issSz);
        #else
            issuer = wolfSSL_X509_NAME_oneline(
                               wolfSSL_X509_get_issuer_name(x509), buff, issSz);
        #endif

            if (wolfSSL_BIO_write(bio, "        Issuer: ",
                          (int)XSTRLEN("        Issuer: ")) <= 0) {
                #ifdef WOLFSSL_SMALL_STACK
                XFREE(issuer, NULL, DYNAMIC_TYPE_OPENSSL);
                #endif
                return WOLFSSL_FAILURE;
            }
            if (issuer != NULL) {
                if (wolfSSL_BIO_write(bio, issuer, (int)XSTRLEN(issuer)) <= 0) {
                    #ifdef WOLFSSL_SMALL_STACK
                    XFREE(issuer, NULL, DYNAMIC_TYPE_OPENSSL);
                    #endif
                    return WOLFSSL_FAILURE;
                }
            }
            #ifdef WOLFSSL_SMALL_STACK
            XFREE(issuer, NULL, DYNAMIC_TYPE_OPENSSL);
            #endif
            if (wolfSSL_BIO_write(bio, "\n", (int)XSTRLEN("\n")) <= 0) {
                return WOLFSSL_FAILURE;
            }
        }

    #ifndef NO_ASN_TIME
        /* print validity */
        {
            char tmp[80];

            if (wolfSSL_BIO_write(bio, "        Validity\n",
                          (int)XSTRLEN("        Validity\n")) <= 0) {
                return WOLFSSL_FAILURE;
            }

            if (wolfSSL_BIO_write(bio, "            Not Before: ",
                          (int)XSTRLEN("            Not Before: ")) <= 0) {
                return WOLFSSL_FAILURE;
            }
            if (x509->notBefore.length > 0) {
                if (GetTimeString(x509->notBefore.data, ASN_UTC_TIME,
                    tmp, sizeof(tmp)) != WOLFSSL_SUCCESS) {
                    if (GetTimeString(x509->notBefore.data, ASN_GENERALIZED_TIME,
                    tmp, sizeof(tmp)) != WOLFSSL_SUCCESS) {
                        WOLFSSL_MSG("Error getting not before date");
                        return WOLFSSL_FAILURE;
                    }
                }
            }
            else {
                XSTRNCPY(tmp, "Not Set", sizeof(tmp)-1);
            }
            tmp[sizeof(tmp) - 1] = '\0'; /* make sure null terminated */
            if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
                return WOLFSSL_FAILURE;
            }

            if (wolfSSL_BIO_write(bio, "\n            Not After : ",
                          (int)XSTRLEN("\n            Not After : ")) <= 0) {
                return WOLFSSL_FAILURE;
            }
            if (x509->notAfter.length > 0) {
                if (GetTimeString(x509->notAfter.data, ASN_UTC_TIME,
                    tmp, sizeof(tmp)) != WOLFSSL_SUCCESS) {
                    if (GetTimeString(x509->notAfter.data, ASN_GENERALIZED_TIME,
                        tmp, sizeof(tmp)) != WOLFSSL_SUCCESS) {
                        WOLFSSL_MSG("Error getting not after date");
                        return WOLFSSL_FAILURE;
                    }
                }
            }
            else {
                XSTRNCPY(tmp, "Not Set", sizeof(tmp)-1);
            }
            tmp[sizeof(tmp) - 1] = '\0'; /* make sure null terminated */
            if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
                return WOLFSSL_FAILURE;
            }
        }
    #endif

        /* print subject */
        {
            char* subject;
        #ifdef WOLFSSL_SMALL_STACK
            char* buff  = NULL;
            int   subSz = 0;
        #else
            char buff[256];
            int  subSz = 256;
        #endif

        #if defined(WOLFSSL_QT)
            subject = wolfSSL_X509_get_name_oneline(
                              wolfSSL_X509_get_subject_name(x509), buff, subSz);
        #else
            subject = wolfSSL_X509_NAME_oneline(
                              wolfSSL_X509_get_subject_name(x509), buff, subSz);
        #endif

            if (wolfSSL_BIO_write(bio, "\n        Subject: ",
                          (int)XSTRLEN("\n        Subject: ")) <= 0) {
                #ifdef WOLFSSL_SMALL_STACK
                XFREE(subject, NULL, DYNAMIC_TYPE_OPENSSL);
                #endif
                return WOLFSSL_FAILURE;
            }
            if (subject != NULL) {
                if (wolfSSL_BIO_write(bio, subject, (int)XSTRLEN(subject)) <= 0) {
                    #ifdef WOLFSSL_SMALL_STACK
                    XFREE(subject, NULL, DYNAMIC_TYPE_OPENSSL);
                    #endif
                    return WOLFSSL_FAILURE;
                }
            }
            #ifdef WOLFSSL_SMALL_STACK
            XFREE(subject, NULL, DYNAMIC_TYPE_OPENSSL);
            #endif
        }

        /* get and print public key */
        if (wolfSSL_BIO_write(bio, "\n        Subject Public Key Info:\n",
                      (int)XSTRLEN("\n        Subject Public Key Info:\n")) <= 0) {
            return WOLFSSL_FAILURE;
        }
        {
        #if (!defined(NO_RSA) && !defined(HAVE_USER_RSA)) || defined(HAVE_ECC)
            char tmp[100];
        #endif

            switch (x509->pubKeyOID) {
            #ifndef NO_RSA
                case RSAk:
                    if (wolfSSL_BIO_write(bio,
                                "            Public Key Algorithm: rsaEncryption\n",
                   (int)XSTRLEN("            Public Key Algorithm: rsaEncryption\n")) <= 0) {
                        return WOLFSSL_FAILURE;
                    }
                #ifdef HAVE_USER_RSA
                    if (wolfSSL_BIO_write(bio,
                        "                Build without user RSA to print key\n",
           (int)XSTRLEN("                Build without user RSA to print key\n"))
                        <= 0) {
                        return WOLFSSL_FAILURE;
                    }
                #else
                    {
                        RsaKey rsa;
                        word32 idx = 0;
                        int  sz;
                        byte lbit = 0;
                        int  rawLen;
                        unsigned char* rawKey;

                        if (wc_InitRsaKey(&rsa, NULL) != 0) {
                            WOLFSSL_MSG("wc_InitRsaKey failure");
                            return WOLFSSL_FAILURE;
                        }
                        if (wc_RsaPublicKeyDecode(x509->pubKey.buffer,
                                &idx, &rsa, x509->pubKey.length) != 0) {
                            WOLFSSL_MSG("Error decoding RSA key");
                            wc_FreeRsaKey(&rsa);
                            return WOLFSSL_FAILURE;
                        }
                        if ((sz = wc_RsaEncryptSize(&rsa)) < 0) {
                            WOLFSSL_MSG("Error getting RSA key size");
                            wc_FreeRsaKey(&rsa);
                            return WOLFSSL_FAILURE;
                        }
                        XSNPRINTF(tmp, sizeof(tmp) - 1, "%s%s: (%d bit)\n%s\n",
                                "                ", "Public-Key", 8 * sz,
                                "                Modulus:");
                        tmp[sizeof(tmp) - 1] = '\0';
                        if (wolfSSL_BIO_write(bio, tmp,
                                                      (int)XSTRLEN(tmp)) <= 0) {
                            wc_FreeRsaKey(&rsa);
                            return WOLFSSL_FAILURE;
                        }

                        /* print out modulus */
                        XSNPRINTF(tmp, sizeof(tmp) - 1,"                    ");
                        tmp[sizeof(tmp) - 1] = '\0';
                        if (mp_leading_bit(&rsa.n)) {
                            lbit = 1;
                            XSTRNCAT(tmp, "00", 3);
                        }

                        rawLen = mp_unsigned_bin_size(&rsa.n);
                        rawKey = (unsigned char*)XMALLOC(rawLen, NULL,
                                DYNAMIC_TYPE_TMP_BUFFER);
                        if (rawKey == NULL) {
                            WOLFSSL_MSG("Memory error");
                            wc_FreeRsaKey(&rsa);
                            return WOLFSSL_FAILURE;
                        }
                        mp_to_unsigned_bin(&rsa.n, rawKey);
                        for (idx = 0; idx < (word32)rawLen; idx++) {
                            char val[5];
                            int valSz = 5;

                            if ((idx == 0) && !lbit) {
                                XSNPRINTF(val, valSz - 1, "%02x", rawKey[idx]);
                            }
                            else if ((idx != 0) && (((idx + lbit) % 15) == 0)) {
                                tmp[sizeof(tmp) - 1] = '\0';
                                if (wolfSSL_BIO_write(bio, tmp,
                                                      (int)XSTRLEN(tmp)) <= 0) {
                                    XFREE(rawKey, NULL,
                                        DYNAMIC_TYPE_TMP_BUFFER);
                                    wc_FreeRsaKey(&rsa);
                                    return WOLFSSL_FAILURE;
                                }
                                XSNPRINTF(tmp, sizeof(tmp) - 1,
                                        ":\n                    ");
                                XSNPRINTF(val, valSz - 1, "%02x", rawKey[idx]);
                            }
                            else {
                                XSNPRINTF(val, valSz - 1, ":%02x", rawKey[idx]);
                            }
                            XSTRNCAT(tmp, val, valSz);
                        }
                        XFREE(rawKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);

                        /* print out remaining modulus values */
                        if ((idx > 0) && (((idx - 1 + lbit) % 15) != 0)) {
                            tmp[sizeof(tmp) - 1] = '\0';
                            if (wolfSSL_BIO_write(bio, tmp,
                                                      (int)XSTRLEN(tmp)) <= 0) {
                                return WOLFSSL_FAILURE;
                            }
                        }

                        /* print out exponent values */
                        rawLen = mp_unsigned_bin_size(&rsa.e);
                        if (rawLen < 0) {
                            WOLFSSL_MSG("Error getting exponent size");
                            wc_FreeRsaKey(&rsa);
                            return WOLFSSL_FAILURE;
                        }

                        if ((word32)rawLen < sizeof(word32)) {
                            rawLen = sizeof(word32);
                        }
                        rawKey = (unsigned char*)XMALLOC(rawLen, NULL,
                                DYNAMIC_TYPE_TMP_BUFFER);
                        if (rawKey == NULL) {
                            WOLFSSL_MSG("Memory error");
                            wc_FreeRsaKey(&rsa);
                            return WOLFSSL_FAILURE;
                        }
                        XMEMSET(rawKey, 0, rawLen);
                        mp_to_unsigned_bin(&rsa.e, rawKey);
                        if ((word32)rawLen <= sizeof(word32)) {
                            idx = *(word32*)rawKey;
                        #ifdef BIG_ENDIAN_ORDER
                            idx = ByteReverseWord32(idx);
                        #endif
                        }
                        XSNPRINTF(tmp, sizeof(tmp) - 1,
                            "\n                Exponent: %d (0x%x)\n",idx, idx);
                        if (wolfSSL_BIO_write(bio, tmp,
                                                      (int)XSTRLEN(tmp)) <= 0) {
                            XFREE(rawKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                            wc_FreeRsaKey(&rsa);
                            return WOLFSSL_FAILURE;
                        }
                        XFREE(rawKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                        wc_FreeRsaKey(&rsa);
                    }
                #endif /* HAVE_USER_RSA */
                    break;
            #endif /* NO_RSA */

            #ifdef HAVE_ECC
                case ECDSAk:
                    {
                        word32 i;
                        ecc_key ecc;

                        if (wolfSSL_BIO_write(bio,
                                "            Public Key Algorithm: EC\n",
                   (int)XSTRLEN("            Public Key Algorithm: EC\n")) <= 0) {
                        return WOLFSSL_FAILURE;
                        }
                        if (wc_ecc_init_ex(&ecc, x509->heap, INVALID_DEVID)
                                != 0) {
                            return WOLFSSL_FAILURE;
                        }

                        i = 0;
                        if (wc_EccPublicKeyDecode(x509->pubKey.buffer, &i,
                                              &ecc, x509->pubKey.length) != 0) {
                            wc_ecc_free(&ecc);
                            return WOLFSSL_FAILURE;
                        }
                        XSNPRINTF(tmp, sizeof(tmp) - 1, "%s%s: (%d bit)\n%s\n",
                                "                 ", "Public-Key",
                                8 * wc_ecc_size(&ecc),
                                "                 pub:");
                        tmp[sizeof(tmp) - 1] = '\0';
                        if (wolfSSL_BIO_write(bio, tmp,
                                                      (int)XSTRLEN(tmp)) <= 0) {
                            wc_ecc_free(&ecc);
                            return WOLFSSL_FAILURE;
                        }
                        XSNPRINTF(tmp, sizeof(tmp) - 1,"                     ");
                        {
                            word32 derSz;
                            byte*  der;

                            derSz = wc_ecc_size(&ecc) * WOLFSSL_BIT_SIZE;
                            der = (byte*)XMALLOC(derSz, x509->heap,
                                    DYNAMIC_TYPE_TMP_BUFFER);
                            if (der == NULL) {
                                wc_ecc_free(&ecc);
                                return WOLFSSL_FAILURE;
                            }

                            if (wc_ecc_export_x963(&ecc, der, &derSz) != 0) {
                                wc_ecc_free(&ecc);
                                XFREE(der, x509->heap, DYNAMIC_TYPE_TMP_BUFFER);
                                return WOLFSSL_FAILURE;
                            }
                            for (i = 0; i < derSz; i++) {
                                char val[5];
                                int valSz = 5;

                                if (i == 0) {
                                    XSNPRINTF(val, valSz - 1, "%02x", der[i]);
                                }
                                else if ((i % 15) == 0) {
                                    tmp[sizeof(tmp) - 1] = '\0';
                                    if (wolfSSL_BIO_write(bio, tmp,
                                                (int)XSTRLEN(tmp)) <= 0) {
                                        wc_ecc_free(&ecc);
                                        XFREE(der, x509->heap,
                                                DYNAMIC_TYPE_TMP_BUFFER);
                                        return WOLFSSL_FAILURE;
                                    }
                                    XSNPRINTF(tmp, sizeof(tmp) - 1,
                                        ":\n                     ");
                                    XSNPRINTF(val, valSz - 1, "%02x", der[i]);
                                }
                                else {
                                    XSNPRINTF(val, valSz - 1, ":%02x", der[i]);
                                }
                                XSTRNCAT(tmp, val, valSz);
                            }

                            /* print out remaining modulus values */
                            if ((i > 0) && (((i - 1) % 15) != 0)) {
                                tmp[sizeof(tmp) - 1] = '\0';
                                if (wolfSSL_BIO_write(bio, tmp,
                                                      (int)XSTRLEN(tmp)) <= 0) {
                                    wc_ecc_free(&ecc);
                                    XFREE(der, x509->heap,
                                                DYNAMIC_TYPE_TMP_BUFFER);
                                    return WOLFSSL_FAILURE;
                                }
                            }

                            XFREE(der, x509->heap, DYNAMIC_TYPE_TMP_BUFFER);
                        }
                        XSNPRINTF(tmp, sizeof(tmp) - 1, "\n%s%s: %s\n",
                                "                ", "ASN1 OID",
                                ecc.dp->name);
                        if (wolfSSL_BIO_write(bio, tmp,
                                                      (int)XSTRLEN(tmp)) <= 0) {
                            wc_ecc_free(&ecc);
                            return WOLFSSL_FAILURE;
                        }
                        wc_ecc_free(&ecc);
                    }
                    break;
            #endif /* HAVE_ECC */
                default:
                    WOLFSSL_MSG("Unknown key type");
                    return WOLFSSL_FAILURE;
            }
        }

        /* print out extensions */
        if (wolfSSL_BIO_write(bio, "        X509v3 extensions:\n",
                      (int)XSTRLEN("        X509v3 extensions:\n")) <= 0) {
            return WOLFSSL_FAILURE;
        }

        /* print subject key id */
        if (x509->subjKeyIdSet && x509->subjKeyId != NULL &&
                x509->subjKeyIdSz > 0) {
            char tmp[100];
            word32 i;
            char val[5];
            int valSz = 5;


            if (wolfSSL_BIO_write(bio,
                        "            X509v3 Subject Key Identifier: \n",
           (int)XSTRLEN("            X509v3 Subject Key Identifier: \n"))
                 <= 0) {
                return WOLFSSL_FAILURE;
            }

            XSNPRINTF(tmp, sizeof(tmp) - 1, "                ");
            for (i = 0; i < sizeof(tmp) && i < (x509->subjKeyIdSz - 1); i++) {
                XSNPRINTF(val, valSz - 1, "%02X:", x509->subjKeyId[i]);
                XSTRNCAT(tmp, val, valSz);
            }
            XSNPRINTF(val, valSz - 1, "%02X\n", x509->subjKeyId[i]);
            XSTRNCAT(tmp, val, valSz);
            if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
                return WOLFSSL_FAILURE;
            }
        }

        /* printf out authority key id */
        if (x509->authKeyIdSet && x509->authKeyId != NULL &&
                x509->authKeyIdSz > 0) {
            char tmp[100];
            word32 i;
            char val[5];
            int valSz = 5;
            int len = 0;

            if (wolfSSL_BIO_write(bio,
                        "            X509v3 Authority Key Identifier: \n",
           (int)XSTRLEN("            X509v3 Authority Key Identifier: \n"))
                 <= 0) {
                return WOLFSSL_FAILURE;
            }

            XSNPRINTF(tmp, sizeof(tmp) - 1, "                keyid");
            for (i = 0; i < x509->authKeyIdSz; i++) {
                /* check if buffer is almost full */
                if (XSTRLEN(tmp) >= sizeof(tmp) - valSz) {
                    if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
                        return WOLFSSL_FAILURE;
                    }
                    tmp[0] = '\0';
                }
                XSNPRINTF(val, valSz - 1, ":%02X", x509->authKeyId[i]);
                XSTRNCAT(tmp, val, valSz);
            }
            len = (int)XSTRLEN("\n");
            XSTRNCAT(tmp, "\n", len + 1);
            if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
                return WOLFSSL_FAILURE;
            }
        }

        /* print basic constraint */
        if (x509->basicConstSet) {
            char tmp[100];

            if (wolfSSL_BIO_write(bio,
                        "\n            X509v3 Basic Constraints: \n",
           (int)XSTRLEN("\n            X509v3 Basic Constraints: \n"))
                 <= 0) {
                return WOLFSSL_FAILURE;
            }
            XSNPRINTF(tmp, sizeof(tmp),
                    "                CA:%s\n",
                    (x509->isCa)? "TRUE": "FALSE");
            if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
                return WOLFSSL_FAILURE;
            }
        }

        /* print out signature */
        if (x509->sig.length > 0) {
            unsigned char* sig;
            int sigSz;
            int i;
            char tmp[100];
            int sigOid = wolfSSL_X509_get_signature_type(x509);

            if (wolfSSL_BIO_write(bio,
                                "    Signature Algorithm: ",
                   (int)XSTRLEN("    Signature Algorithm: ")) <= 0) {
                return WOLFSSL_FAILURE;
            }
            XSNPRINTF(tmp, sizeof(tmp) - 1,"%s\n", GetSigName(sigOid));
            tmp[sizeof(tmp) - 1] = '\0';
            if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
                return WOLFSSL_FAILURE;
            }

            sigSz = (int)x509->sig.length;
            sig = (unsigned char*)XMALLOC(sigSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            if (sig == NULL) {
                return WOLFSSL_FAILURE;
            }

            if (wolfSSL_X509_get_signature(x509, sig, &sigSz) <= 0) {
                XFREE(sig, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                return WOLFSSL_FAILURE;
            }
            XSNPRINTF(tmp, sizeof(tmp) - 1,"        ");
            tmp[sizeof(tmp) - 1] = '\0';
            for (i = 0; i < sigSz; i++) {
                char val[5];
                int valSz = 5;

                if (i == 0) {
                    XSNPRINTF(val, valSz - 1, "%02x", sig[i]);
                }
                else if (((i % 18) == 0)) {
                    tmp[sizeof(tmp) - 1] = '\0';
                    if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp))
                            <= 0) {
                        XFREE(sig, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                        return WOLFSSL_FAILURE;
                    }
                    XSNPRINTF(tmp, sizeof(tmp) - 1,
                            ":\n        ");
                    XSNPRINTF(val, valSz - 1, "%02x", sig[i]);
                }
                else {
                    XSNPRINTF(val, valSz - 1, ":%02x", sig[i]);
                }
                XSTRNCAT(tmp, val, valSz);
            }
            XFREE(sig, NULL, DYNAMIC_TYPE_TMP_BUFFER);

            /* print out remaining sig values */
            if ((i > 0) && (((i - 1) % 18) != 0)) {
                    tmp[sizeof(tmp) - 1] = '\0';
                    if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp))
                            <= 0) {
                        return WOLFSSL_FAILURE;
                    }
            }
        }

        /* done with print out */
        if (wolfSSL_BIO_write(bio, "\n\0", (int)XSTRLEN("\n\0")) <= 0) {
            return WOLFSSL_FAILURE;
        }

        return WOLFSSL_SUCCESS;
    }
    int wolfSSL_X509_print(WOLFSSL_BIO* bio, WOLFSSL_X509* x509)
    {
        return wolfSSL_X509_print_ex(bio, x509, 0, 0);
    }

#ifndef NO_FILESYSTEM
    int wolfSSL_X509_print_fp(XFILE fp, WOLFSSL_X509 *x509)
    {
        WOLFSSL_BIO* bio;
        int ret;

        WOLFSSL_ENTER("wolfSSL_X509_print_fp");

        if (!fp || !x509) {
            WOLFSSL_MSG("Bad parameter");
            return WOLFSSL_FAILURE;
        }

        if (!(bio = wolfSSL_BIO_new(wolfSSL_BIO_s_file()))) {
            WOLFSSL_MSG("wolfSSL_BIO_new wolfSSL_BIO_s_file error");
            return WOLFSSL_FAILURE;
        }

        if (wolfSSL_BIO_set_fp(bio, fp, BIO_NOCLOSE) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("wolfSSL_BIO_set_fp error");
            wolfSSL_BIO_free(bio);
            return WOLFSSL_FAILURE;
        }

        ret = wolfSSL_X509_print(bio, x509);

        wolfSSL_BIO_free(bio);

        return ret;
    }
#endif /* NO_FILESYSTEM */

#endif /* XSNPRINTF */

    int wolfSSL_X509_signature_print(WOLFSSL_BIO *bp,
            const WOLFSSL_X509_ALGOR *sigalg, const WOLFSSL_ASN1_STRING *sig)
    {
        (void)sig;

        WOLFSSL_ENTER("wolfSSL_X509_signature_print");

        if (!bp || !sigalg) {
            WOLFSSL_MSG("Bad parameter");
            return WOLFSSL_FAILURE;
        }

        if (wolfSSL_BIO_puts(bp, "    Signature Algorithm: ") <= 0) {
            WOLFSSL_MSG("wolfSSL_BIO_puts error");
            return WOLFSSL_FAILURE;
        }

        if (wolfSSL_i2a_ASN1_OBJECT(bp, sigalg->algorithm) <= 0) {
            WOLFSSL_MSG("wolfSSL_i2a_ASN1_OBJECT error");
            return WOLFSSL_FAILURE;
        }

        return WOLFSSL_SUCCESS;
    }
#endif /* !NO_BIO */

#ifndef NO_WOLFSSL_STUB
    void wolfSSL_X509_get0_signature(const WOLFSSL_ASN1_BIT_STRING **psig,
            const WOLFSSL_X509_ALGOR **palg, const WOLFSSL_X509 *x509)
    {
        (void)psig;
        (void)palg;
        (void)x509;
        WOLFSSL_STUB("wolfSSL_X509_get0_signature");
    }
#endif

#endif /* OPENSSL_EXTRA */

#endif /* !NO_CERTS */

#ifdef OPENSSL_EXTRA
#if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
/* Creates cipher->description based on cipher->offset
 * cipher->offset is set in wolfSSL_get_ciphers_compat when it is added
 * to a stack of ciphers.
 * @param [in] cipher: A cipher from a stack of ciphers.
 * return WOLFSSL_SUCCESS if cipher->description is set, else WOLFSSL_FAILURE
 */
int wolfSSL_sk_CIPHER_description(WOLFSSL_CIPHER* cipher)
{
    int ret = WOLFSSL_FAILURE;
    int i,j,k;
    int strLen;
    unsigned long offset;
    char* dp;
    const char* name;
    const char *keaStr, *authStr, *encStr, *macStr, *protocol;
    char n[MAX_SEGMENTS][MAX_SEGMENT_SZ] = {{0}};
    unsigned char len = MAX_DESCRIPTION_SZ-1;
    const CipherSuiteInfo* cipher_names;
    ProtocolVersion pv;
    WOLFSSL_ENTER("wolfSSL_sk_CIPHER_description");

    if (cipher == NULL)
        return WOLFSSL_FAILURE;

    dp = cipher->description;
    if (dp == NULL)
        return WOLFSSL_FAILURE;

    cipher_names = GetCipherNames();

    offset = cipher->offset;
    if (offset >= (unsigned long)GetCipherNamesSize())
        return WOLFSSL_FAILURE;
    pv.major = cipher_names[offset].major;
    pv.minor = cipher_names[offset].minor;
    protocol = wolfSSL_internal_get_version(&pv);

    name = cipher_names[offset].name;

    if (name == NULL)
        return ret;

    /* Segment cipher name into n[n0,n1,n2,n4]
     * These are used later for comparisons to create:
     * keaStr, authStr, encStr, macStr
     *
     * If cipher_name = ECDHE-ECDSA-AES256-SHA
     * then n0 = "ECDHE", n1 = "ECDSA", n2 = "AES256", n3 = "SHA"
     * and n = [n0,n1,n2,n3,0]
     */
    strLen = (int)XSTRLEN(name);

    for (i = 0, j = 0, k = 0; i <= strLen; i++) {
        if (k >= MAX_SEGMENTS || j >= MAX_SEGMENT_SZ)
            break;

        if (name[i] != '-' && name[i] != '\0') {
            n[k][j] = name[i]; /* Fill kth segment string until '-' */
            j++;
        }
        else {
            n[k][j] = '\0';
            j = 0;
            k++;
        }
    }
    /* keaStr */
    keaStr = GetCipherKeaStr(n);
    /* authStr */
    authStr = GetCipherAuthStr(n);
    /* encStr */
    encStr = GetCipherEncStr(n);
    if ((cipher->bits = SetCipherBits(encStr)) == WOLFSSL_FAILURE) {
       WOLFSSL_MSG("Cipher Bits Not Set.");
    }
    /* macStr */
    macStr = GetCipherMacStr(n);


    /* Build up the string by copying onto the end. */
    XSTRNCPY(dp, name, len);
    dp[len-1] = '\0'; strLen = (int)XSTRLEN(dp);
    len -= (int)strLen; dp += strLen;

    XSTRNCPY(dp, " ", len);
    dp[len-1] = '\0'; strLen = (int)XSTRLEN(dp);
    len -= (int)strLen; dp += strLen;
    XSTRNCPY(dp, protocol, len);
    dp[len-1] = '\0'; strLen = (int)XSTRLEN(dp);
    len -= (int)strLen; dp += strLen;

    XSTRNCPY(dp, " Kx=", len);
    dp[len-1] = '\0'; strLen = (int)XSTRLEN(dp);
    len -= (int)strLen; dp += strLen;
    XSTRNCPY(dp, keaStr, len);
    dp[len-1] = '\0'; strLen = (int)XSTRLEN(dp);
    len -= (int)strLen; dp += strLen;

    XSTRNCPY(dp, " Au=", len);
    dp[len-1] = '\0'; strLen = (int)XSTRLEN(dp);
    len -= (int)strLen; dp += strLen;
    XSTRNCPY(dp, authStr, len);
    dp[len-1] = '\0'; strLen = (int)XSTRLEN(dp);
    len -= (int)strLen; dp += strLen;

    XSTRNCPY(dp, " Enc=", len);
    dp[len-1] = '\0'; strLen = (int)XSTRLEN(dp);
    len -= (int)strLen; dp += strLen;
    XSTRNCPY(dp, encStr, len);
    dp[len-1] = '\0'; strLen = (int)XSTRLEN(dp);
    len -= (int)strLen; dp += strLen;

    XSTRNCPY(dp, " Mac=", len);
    dp[len-1] = '\0'; strLen = (int)XSTRLEN(dp);
    len -= (int)strLen; dp += strLen;
    XSTRNCPY(dp, macStr, len);
    dp[len-1] = '\0';

    return WOLFSSL_SUCCESS;
}
#endif /* OPENSSL_ALL || WOLFSSL_QT */

static WC_INLINE const char* wolfssl_kea_to_string(int kea)
{
    const char* keaStr;

    switch (kea) {
        case no_kea:
            keaStr = "None";
            break;
#ifndef NO_RSA
        case rsa_kea:
            keaStr = "RSA";
            break;
#endif
#ifndef NO_DH
        case diffie_hellman_kea:
            keaStr = "DHE";
            break;
#endif
        case fortezza_kea:
            keaStr = "FZ";
            break;
#ifndef NO_PSK
        case psk_kea:
            keaStr = "PSK";
            break;
    #ifndef NO_DH
        case dhe_psk_kea:
            keaStr = "DHEPSK";
            break;
    #endif
    #ifdef HAVE_ECC
        case ecdhe_psk_kea:
            keaStr = "ECDHEPSK";
            break;
    #endif
#endif
#ifdef HAVE_NTRU
        case ntru_kea:
            keaStr = "NTRU";
            break;
#endif
#ifdef HAVE_ECC
        case ecc_diffie_hellman_kea:
            keaStr = "ECDHE";
            break;
        case ecc_static_diffie_hellman_kea:
            keaStr = "ECDH";
            break;
#endif
        default:
            keaStr = "unknown";
            break;
    }

    return keaStr;
}

static WC_INLINE const char* wolfssl_sigalg_to_string(int sig_algo)
{
    const char* authStr;

    switch (sig_algo) {
        case anonymous_sa_algo:
            authStr = "None";
            break;
#ifndef NO_RSA
        case rsa_sa_algo:
            authStr = "RSA";
            break;
    #ifdef WC_RSA_PSS
        case rsa_pss_sa_algo:
            authStr = "RSA-PSS";
            break;
    #endif
#endif
#ifndef NO_DSA
        case dsa_sa_algo:
            authStr = "DSA";
            break;
#endif
#ifdef HAVE_ECC
        case ecc_dsa_sa_algo:
            authStr = "ECDSA";
            break;
#endif
#ifdef HAVE_ED25519
        case ed25519_sa_algo:
            authStr = "Ed25519";
            break;
#endif
#ifdef HAVE_ED448
        case ed448_sa_algo:
            authStr = "Ed448";
            break;
#endif
        default:
            authStr = "unknown";
            break;
    }

    return authStr;
}

static WC_INLINE const char* wolfssl_cipher_to_string(int cipher, int key_size)
{
    const char* encStr;

    (void)key_size;

    switch (cipher) {
        case wolfssl_cipher_null:
            encStr = "None";
            break;
#ifndef NO_RC4
        case wolfssl_rc4:
            encStr = "RC4(128)";
            break;
#endif
#ifndef NO_DES3
        case wolfssl_triple_des:
            encStr = "3DES(168)";
            break;
#endif
#ifdef HAVE_IDEA
        case wolfssl_idea:
            encStr = "IDEA(128)";
            break;
#endif
#ifndef NO_AES
        case wolfssl_aes:
            if (key_size == 128)
                encStr = "AES(128)";
            else if (key_size == 256)
                encStr = "AES(256)";
            else
                encStr = "AES(?)";
            break;
    #ifdef HAVE_AESGCM
        case wolfssl_aes_gcm:
            if (key_size == 128)
                encStr = "AESGCM(128)";
            else if (key_size == 256)
                encStr = "AESGCM(256)";
            else
                encStr = "AESGCM(?)";
            break;
    #endif
    #ifdef HAVE_AESCCM
        case wolfssl_aes_ccm:
            if (key_size == 128)
                encStr = "AESCCM(128)";
            else if (key_size == 256)
                encStr = "AESCCM(256)";
            else
                encStr = "AESCCM(?)";
            break;
    #endif
#endif
#ifdef HAVE_CHACHA
        case wolfssl_chacha:
            encStr = "CHACHA20/POLY1305(256)";
            break;
#endif
#ifdef HAVE_CAMELLIA
        case wolfssl_camellia:
            if (key_size == 128)
                encStr = "Camellia(128)";
            else if (key_size == 256)
                encStr = "Camellia(256)";
            else
                encStr = "Camellia(?)";
            break;
#endif
#if defined(HAVE_HC128) && !defined(NO_HC128)
        case wolfssl_hc128:
            encStr = "HC128(128)";
            break;
#endif
#if defined(HAVE_RABBIT) && !defined(NO_RABBIT)
        case wolfssl_rabbit:
            encStr = "RABBIT(128)";
            break;
#endif
        default:
            encStr = "unknown";
            break;
    }

    return encStr;
}

static WC_INLINE const char* wolfssl_mac_to_string(int mac)
{
    const char* macStr;

    switch (mac) {
        case no_mac:
            macStr = "None";
            break;
#ifndef NO_MD5
        case md5_mac:
            macStr = "MD5";
            break;
#endif
#ifndef NO_SHA
        case sha_mac:
            macStr = "SHA1";
            break;
#endif
#ifdef HAVE_SHA224
        case sha224_mac:
            macStr = "SHA224";
            break;
#endif
#ifndef NO_SHA256
        case sha256_mac:
            macStr = "SHA256";
            break;
#endif
#ifdef HAVE_SHA384
        case sha384_mac:
            macStr = "SHA384";
            break;
#endif
#ifdef HAVE_SHA512
        case sha512_mac:
            macStr = "SHA512";
            break;
#endif
        default:
            macStr = "unknown";
            break;
    }

    return macStr;
}

char* wolfSSL_CIPHER_description(const WOLFSSL_CIPHER* cipher, char* in,
                                 int len)
{
    char *ret = in;
    const char *keaStr, *authStr, *encStr, *macStr;
    size_t strLen;
    WOLFSSL_ENTER("wolfSSL_CIPHER_description");

    if (cipher == NULL || in == NULL)
        return NULL;

#if defined(WOLFSSL_QT) || defined(OPENSSL_ALL)
    /* if cipher is in the stack from wolfSSL_get_ciphers_compat then
     * Return the description based on cipher_names[cipher->offset]
     */
    if (cipher->in_stack == TRUE) {
        wolfSSL_sk_CIPHER_description((WOLFSSL_CIPHER*)cipher);
        XSTRNCPY(in,cipher->description,len);
        return ret;
    }
#endif

    /* Get the cipher description based on the SSL session cipher */
    keaStr = wolfssl_kea_to_string(cipher->ssl->specs.kea);
    authStr = wolfssl_sigalg_to_string(cipher->ssl->specs.sig_algo);
    encStr = wolfssl_cipher_to_string(cipher->ssl->specs.bulk_cipher_algorithm,
                                      cipher->ssl->specs.key_size);
    macStr = wolfssl_mac_to_string(cipher->ssl->specs.mac_algorithm);

    /* Build up the string by copying onto the end. */
    XSTRNCPY(in, wolfSSL_CIPHER_get_name(cipher), len);
    in[len-1] = '\0'; strLen = XSTRLEN(in); len -= (int)strLen; in += strLen;

    XSTRNCPY(in, " ", len);
    in[len-1] = '\0'; strLen = XSTRLEN(in); len -= (int)strLen; in += strLen;
    XSTRNCPY(in, wolfSSL_get_version(cipher->ssl), len);
    in[len-1] = '\0'; strLen = XSTRLEN(in); len -= (int)strLen; in += strLen;

    XSTRNCPY(in, " Kx=", len);
    in[len-1] = '\0'; strLen = XSTRLEN(in); len -= (int)strLen; in += strLen;
    XSTRNCPY(in, keaStr, len);
    in[len-1] = '\0'; strLen = XSTRLEN(in); len -= (int)strLen; in += strLen;

    XSTRNCPY(in, " Au=", len);
    in[len-1] = '\0'; strLen = XSTRLEN(in); len -= (int)strLen; in += strLen;
    XSTRNCPY(in, authStr, len);
    in[len-1] = '\0'; strLen = XSTRLEN(in); len -= (int)strLen; in += strLen;

    XSTRNCPY(in, " Enc=", len);
    in[len-1] = '\0'; strLen = XSTRLEN(in); len -= (int)strLen; in += strLen;
    XSTRNCPY(in, encStr, len);
    in[len-1] = '\0'; strLen = XSTRLEN(in); len -= (int)strLen; in += strLen;

    XSTRNCPY(in, " Mac=", len);
    in[len-1] = '\0'; strLen = XSTRLEN(in); len -= (int)strLen; in += strLen;
    XSTRNCPY(in, macStr, len);
    in[len-1] = '\0';

    return ret;
}


#ifndef NO_SESSION_CACHE

WOLFSSL_SESSION* wolfSSL_get1_session(WOLFSSL* ssl)
{
    if (ssl == NULL) {
        return NULL;
    }

    /* sessions are stored statically, no need for reference count */
    return wolfSSL_get_session(ssl);
}

#endif /* NO_SESSION_CACHE */



/* was do nothing */
/*
void OPENSSL_free(void* buf)
{
    (void)buf;
}
*/

#ifndef NO_WOLFSSL_STUB
int wolfSSL_OCSP_parse_url(char* url, char** host, char** port, char** path,
                   int* ssl)
{
    (void)url;
    (void)host;
    (void)port;
    (void)path;
    (void)ssl;
    WOLFSSL_STUB("OCSP_parse_url");
    return 0;
}
#endif

#ifndef NO_MD4

void wolfSSL_MD4_Init(WOLFSSL_MD4_CTX* md4)
{
    /* make sure we have a big enough buffer */
    typedef char ok[sizeof(md4->buffer) >= sizeof(Md4) ? 1 : -1];
    (void) sizeof(ok);

    WOLFSSL_ENTER("MD4_Init");
    wc_InitMd4((Md4*)md4);
}


void wolfSSL_MD4_Update(WOLFSSL_MD4_CTX* md4, const void* data,
                       unsigned long len)
{
    WOLFSSL_ENTER("MD4_Update");
    wc_Md4Update((Md4*)md4, (const byte*)data, (word32)len);
}


void wolfSSL_MD4_Final(unsigned char* digest, WOLFSSL_MD4_CTX* md4)
{
    WOLFSSL_ENTER("MD4_Final");
    wc_Md4Final((Md4*)md4, digest);
}

#endif /* NO_MD4 */


#ifndef NO_BIO

/* Removes a WOLFSSL_BIO struct from the WOLFSSL_BIO linked list.
 *
 * bio is the WOLFSSL_BIO struct in the list and removed.
 *
 * The return WOLFSSL_BIO struct is the next WOLFSSL_BIO in the list or NULL if
 * there is none.
 */
WOLFSSL_BIO* wolfSSL_BIO_pop(WOLFSSL_BIO* bio)
{
    if (bio == NULL) {
        WOLFSSL_MSG("Bad argument passed in");
        return NULL;
    }

    if (bio->prev != NULL) {
        bio->prev->next = bio->next;
    }

    if (bio->next != NULL) {
        bio->next->prev = bio->prev;
    }

    return bio->next;
}



WOLFSSL_BIO_METHOD* wolfSSL_BIO_s_mem(void)
{
    static WOLFSSL_BIO_METHOD meth;

    WOLFSSL_ENTER("wolfSSL_BIO_s_mem");
    meth.type = WOLFSSL_BIO_MEMORY;

    return &meth;
}


WOLFSSL_BIO_METHOD* wolfSSL_BIO_f_base64(void)
{
    static WOLFSSL_BIO_METHOD meth;

    WOLFSSL_ENTER("wolfSSL_BIO_f_base64");
    meth.type = WOLFSSL_BIO_BASE64;

    return &meth;
}


/* Set the flag for the bio.
 *
 * bio   the structure to set the flag in
 * flags the flag to use
 */
void wolfSSL_BIO_set_flags(WOLFSSL_BIO* bio, int flags)
{
    WOLFSSL_ENTER("wolfSSL_BIO_set_flags");

    if (bio != NULL) {
        bio->flags |= flags;
    }
}

void wolfSSL_BIO_clear_flags(WOLFSSL_BIO *bio, int flags)
{
    WOLFSSL_ENTER("wolfSSL_BIO_clear_flags");
    if (bio != NULL) {
        bio->flags &= ~flags;
    }
}

/* Set ex_data for WOLFSSL_BIO
 *
 * bio  : BIO structure to set ex_data in
 * idx  : Index of ex_data to set
 * data : Data to set in ex_data
 *
 * Returns WOLFSSL_SUCCESS on success or WOLFSSL_FAILURE on failure
 */
int wolfSSL_BIO_set_ex_data(WOLFSSL_BIO *bio, int idx, void *data)
{
    WOLFSSL_ENTER("wolfSSL_BIO_set_ex_data");
#ifdef HAVE_EX_DATA
    if (bio != NULL && idx < MAX_EX_DATA) {
        return wolfSSL_CRYPTO_set_ex_data(&bio->ex_data, idx, data);
    }
#else
    (void)bio;
    (void)idx;
    (void)data;
#endif
    return WOLFSSL_FAILURE;
}

#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
/* Set ex_data for WOLFSSL_BIO
 *
 * bio  : BIO structure to set ex_data in
 * idx  : Index of ex_data to set
 * data : Data to set in ex_data
 * cleanup_routine : Function pointer to clean up data
 *
 * Returns WOLFSSL_SUCCESS on success or WOLFSSL_FAILURE on failure
 */
int wolfSSL_BIO_set_ex_data_with_cleanup(
    WOLFSSL_BIO *bio,
    int idx,
    void *data,
    wolfSSL_ex_data_cleanup_routine_t cleanup_routine)
{
    WOLFSSL_ENTER("wolfSSL_BIO_set_ex_data_with_cleanup");
    if (bio != NULL && idx < MAX_EX_DATA) {
        return wolfSSL_CRYPTO_set_ex_data_with_cleanup(&bio->ex_data, idx, data,
                                                       cleanup_routine);
    }
    return WOLFSSL_FAILURE;
}
#endif /* HAVE_EX_DATA_CLEANUP_HOOKS */

/* Get ex_data in WOLFSSL_BIO at given index
 *
 * bio  : BIO structure to get ex_data from
 * idx  : Index of ex_data to get data from
 *
 * Returns void pointer to ex_data on success or NULL on failure
 */
void *wolfSSL_BIO_get_ex_data(WOLFSSL_BIO *bio, int idx)
{
    WOLFSSL_ENTER("wolfSSL_BIO_get_ex_data");
#ifdef HAVE_EX_DATA
    if (bio != NULL && idx < MAX_EX_DATA && idx >= 0) {
        return wolfSSL_CRYPTO_get_ex_data(&bio->ex_data, idx);
    }
#else
    (void)bio;
    (void)idx;
#endif
    return NULL;
}

#endif /* !NO_BIO */

#ifndef NO_WOLFSSL_STUB
void wolfSSL_RAND_screen(void)
{
    WOLFSSL_STUB("RAND_screen");
}
#endif



int wolfSSL_RAND_load_file(const char* fname, long len)
{
    (void)fname;
    /* wolfCrypt provides enough entropy internally or will report error */
    if (len == -1)
        return 1024;
    else
        return (int)len;
}


#ifndef NO_WOLFSSL_STUB
WOLFSSL_COMP_METHOD* wolfSSL_COMP_zlib(void)
{
    WOLFSSL_STUB("COMP_zlib");
    return 0;
}
#endif

#ifndef NO_WOLFSSL_STUB
WOLFSSL_COMP_METHOD* wolfSSL_COMP_rle(void)
{
    WOLFSSL_STUB("COMP_rle");
    return 0;
}
#endif

#ifndef NO_WOLFSSL_STUB
int wolfSSL_COMP_add_compression_method(int method, void* data)
{
    (void)method;
    (void)data;
    WOLFSSL_STUB("COMP_add_compression_method");
    return 0;
}
#endif

/*  wolfSSL_set_dynlock_create_callback
 *  CRYPTO_set_dynlock_create_callback has been deprecated since openSSL 1.0.1.
 *  This function exists for compatibility purposes because wolfSSL satisfies
 *  thread safety without relying on the callback.
 */
void wolfSSL_set_dynlock_create_callback(WOLFSSL_dynlock_value* (*f)(
                                                          const char*, int))
{
    WOLFSSL_STUB("CRYPTO_set_dynlock_create_callback");
    (void)f;
}
/*  wolfSSL_set_dynlock_lock_callback
 *  CRYPTO_set_dynlock_lock_callback has been deprecated since openSSL 1.0.1.
 *  This function exists for compatibility purposes because wolfSSL satisfies
 *  thread safety without relying on the callback.
 */
void wolfSSL_set_dynlock_lock_callback(
             void (*f)(int, WOLFSSL_dynlock_value*, const char*, int))
{
    WOLFSSL_STUB("CRYPTO_set_set_dynlock_lock_callback");
    (void)f;
}
/*  wolfSSL_set_dynlock_destroy_callback
 *  CRYPTO_set_dynlock_destroy_callback has been deprecated since openSSL 1.0.1.
 *  This function exists for compatibility purposes because wolfSSL satisfies
 *  thread safety without relying on the callback.
 */
void wolfSSL_set_dynlock_destroy_callback(
                  void (*f)(WOLFSSL_dynlock_value*, const char*, int))
{
    WOLFSSL_STUB("CRYPTO_set_set_dynlock_destroy_callback");
    (void)f;
}


#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
const char* wolfSSL_X509_verify_cert_error_string(long err)
{
    return wolfSSL_ERR_reason_error_string(err);
}
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#ifdef OPENSSL_EXTRA

#ifndef NO_WOLFSSL_STUB
int wolfSSL_X509_LOOKUP_add_dir(WOLFSSL_X509_LOOKUP* lookup, const char* dir,
                               long len)
{
    (void)lookup;
    (void)dir;
    (void)len;
    WOLFSSL_STUB("X509_LOOKUP_add_dir");
    return 0;
}
#endif

int wolfSSL_X509_LOOKUP_load_file(WOLFSSL_X509_LOOKUP* lookup,
                                 const char* file, long type)
{
#if !defined(NO_FILESYSTEM) && \
    (defined(WOLFSSL_PEM_TO_DER) || defined(WOLFSSL_DER_TO_PEM))
    int           ret = WOLFSSL_FAILURE;
    XFILE         fp;
    long          sz;
    byte*         pem = NULL;
    byte*         curr = NULL;
    byte*         prev = NULL;
    WOLFSSL_X509* x509;
    const char* header = NULL;
    const char* footer = NULL;

    if (type != X509_FILETYPE_PEM)
        return WS_RETURN_CODE(BAD_FUNC_ARG,WOLFSSL_FAILURE);

    fp = XFOPEN(file, "rb");
    if (fp == XBADFILE)
        return WS_RETURN_CODE(BAD_FUNC_ARG,WOLFSSL_FAILURE);

    if(XFSEEK(fp, 0, XSEEK_END) != 0) {
        XFCLOSE(fp);
        return WS_RETURN_CODE(WOLFSSL_BAD_FILE,WOLFSSL_FAILURE);
    }
    sz = XFTELL(fp);
    XREWIND(fp);

    if (sz > MAX_WOLFSSL_FILE_SIZE || sz <= 0) {
        WOLFSSL_MSG("X509_LOOKUP_load_file size error");
        goto end;
    }

    pem = (byte*)XMALLOC(sz, 0, DYNAMIC_TYPE_PEM);
    if (pem == NULL) {
        ret = MEMORY_ERROR;
        goto end;
    }

    /* Read in file which may be CRLs or certificates. */
    if (XFREAD(pem, (size_t)sz, 1, fp) != 1)
        goto end;

    prev = curr = pem;
    do {
        /* get PEM header and footer based on type */
        if (wc_PemGetHeaderFooter(CRL_TYPE, &header, &footer) == 0 &&
                XSTRNSTR((char*)curr, header, (unsigned int)sz) != NULL) {
#ifdef HAVE_CRL
            WOLFSSL_CERT_MANAGER* cm = lookup->store->cm;

            if (cm->crl == NULL) {
                if (wolfSSL_CertManagerEnableCRL(cm, 0) != WOLFSSL_SUCCESS) {
                    WOLFSSL_MSG("Enable CRL failed");
                    goto end;
                }
            }

            ret = BufferLoadCRL(cm->crl, curr, sz, WOLFSSL_FILETYPE_PEM,
                NO_VERIFY);
            if (ret != WOLFSSL_SUCCESS)
                goto end;
#endif
            curr = (byte*)XSTRNSTR((char*)curr, footer, (unsigned int)sz);
        }
        else if (wc_PemGetHeaderFooter(CERT_TYPE, &header, &footer) == 0 &&
                XSTRNSTR((char*)curr, header, (unsigned int)sz) != NULL) {
            x509 = wolfSSL_X509_load_certificate_buffer(curr, (int)sz,
                                                        WOLFSSL_FILETYPE_PEM);
            if (x509 == NULL)
                 goto end;
            ret = wolfSSL_X509_STORE_add_cert(lookup->store, x509);
            wolfSSL_X509_free(x509);
            if (ret != WOLFSSL_SUCCESS)
                goto end;
            curr = (byte*)XSTRNSTR((char*)curr, footer, (unsigned int)sz);
        }
        else
            goto end;

        if (curr == NULL)
            goto end;

        curr++;
        sz -= (long)(curr - prev);
        prev = curr;
    }
    while (ret == WOLFSSL_SUCCESS);

end:
    if (pem != NULL)
        XFREE(pem, 0, DYNAMIC_TYPE_PEM);
    XFCLOSE(fp);
    return WS_RETURN_CODE(ret,WOLFSSL_FAILURE);
#else
    (void)lookup;
    (void)file;
    (void)type;
    return WS_RETURN_CODE(WOLFSSL_FAILURE,WOLFSSL_FAILURE);
#endif
}

WOLFSSL_X509_LOOKUP_METHOD* wolfSSL_X509_LOOKUP_hash_dir(void)
{
    /* Method implementation in functions. */
    static WOLFSSL_X509_LOOKUP_METHOD meth = { 1 };
    return &meth;
}

WOLFSSL_X509_LOOKUP_METHOD* wolfSSL_X509_LOOKUP_file(void)
{
    /* Method implementation in functions. */
    static WOLFSSL_X509_LOOKUP_METHOD meth = { 0 };
    return &meth;
}

/* set directory path to load certificate or CRL which have the hash.N form */
/* for late use                                                             */
/* @param ctx    a pointer to WOLFSSL_BY_DIR structure                      */
/* @param argc   directory path                                             */
/* @param argl   file type, either WOLFSSL_FILETYPE_PEM or                  */
/*                                          WOLFSSL_FILETYPE_ASN1           */
/* @return WOLFSSL_SUCCESS on successful, othewise negative or zero         */
static int x509AddCertDir(WOLFSSL_BY_DIR *ctx, const char *argc, long argl)
{
    WOLFSSL_ENTER("x509AddCertDir");

    (void)argl;
#if defined(OPENSSL_ALL) && !defined(NO_FILESYSTEM) && !defined(NO_WOLFSSL_DIR)
    WOLFSSL_BY_DIR_entry *entry;
    size_t pathLen;
    int i, num;
    const char* c;
#ifdef WOLFSSL_SMALL_STACK
    char *buf;
#else
    char  buf[MAX_FILENAME_SZ];
#endif
    
    pathLen = 0;
    c = argc;
    /* sanity check, zero length */
    if (ctx == NULL || c == NULL || *c == '\0')
        return WOLFSSL_FAILURE;
    
#ifdef WOLFSSL_SMALL_STACK
    buf = (char*)XMALLOC(MAX_FILENAME_SZ, NULL, DYNAMIC_TYPE_OPENSSL);
    if (buf == NULL) {
        WOLFSSL_LEAVE("x509AddCertDir", MEMORY_E);
        return MEMORY_E;
    }
#endif

    XMEMSET(buf, 0, MAX_FILENAME_SZ);
    
    do {
        if (*c == SEPARATOR_CHAR || *c == '\0') {
            
            num = wolfSSL_sk_BY_DIR_entry_num(ctx->dir_entry);
            
            for (i=0; i<num; i++) {
                
                entry = wolfSSL_sk_BY_DIR_entry_value(ctx->dir_entry, i);
                
                if (XSTRLEN(entry->dir_name) == pathLen && 
                    XSTRNCMP(entry->dir_name, buf, pathLen) == 0) {
                    WOLFSSL_MSG("dir entry found");
                    break;
                }
            }
            
            if (num == -1 || i == num) {
                WOLFSSL_MSG("no entry found");
                
                if (ctx->dir_entry == NULL) {
                    ctx->dir_entry = wolfSSL_sk_BY_DIR_entry_new_null();
                    
                    if (ctx->dir_entry == NULL) {
                        WOLFSSL_MSG("failed to allocate dir_entry");
                        #ifdef WOLFSSL_SMALL_STACK
                            XFREE(buf, 0, DYNAMIC_TYPE_OPENSSL);
                        #endif
                        return 0;
                    }
                }
                
                entry = wolfSSL_BY_DIR_entry_new();
                if (entry == NULL) {
                    WOLFSSL_MSG("failed to allocate dir entry");
                    #ifdef WOLFSSL_SMALL_STACK
                        XFREE(buf, 0, DYNAMIC_TYPE_OPENSSL);
                    #endif
                    return 0;
                }
                entry->dir_type = (int)argl;
                entry->dir_name = (char*)XMALLOC(pathLen + 1/* \0 termination*/
                                                , NULL, DYNAMIC_TYPE_OPENSSL);
                entry->hashes = wolfSSL_sk_BY_DIR_HASH_new_null();
                if (entry->dir_name == NULL || entry->hashes == NULL) {
                    WOLFSSL_MSG("failed to allocate dir name");
                    wolfSSL_BY_DIR_entry_free(entry);
                    #ifdef WOLFSSL_SMALL_STACK
                        XFREE(buf, 0, DYNAMIC_TYPE_OPENSSL);
                    #endif
                    return 0;
                }
                
                XSTRNCPY(entry->dir_name, buf, pathLen);
                entry->dir_name[pathLen] = '\0';
                
                if (wolfSSL_sk_BY_DIR_entry_push(ctx->dir_entry, entry) 
                                                    != WOLFSSL_SUCCESS) {
                    wolfSSL_BY_DIR_entry_free(entry);
                    #ifdef WOLFSSL_SMALL_STACK
                        XFREE(buf, 0, DYNAMIC_TYPE_OPENSSL);
                    #endif
                    return 0;
                }
            }
            /* skip separator */
            if (*c == SEPARATOR_CHAR) c++;
            
            pathLen = 0;
            XMEMSET(buf, 0, MAX_FILENAME_SZ);
        }
        buf[pathLen++] = *c;
        
    } while(*c++ != '\0');
    
#ifdef WOLFSSL_SMALL_STACK
    XFREE(buf, 0, DYNAMIC_TYPE_OPENSSL);
#endif
    
    return WOLFSSL_SUCCESS;
#else
    (void)ctx;
    (void)argc;
    return WOLFSSL_NOT_IMPLEMENTED;
#endif
}

/* set additional data to X509_LOOKUP                                   */
/* @param ctx    a pointer to X509_LOOKUP structure                     */
/* @param cmd    control command :                                      */
/*               X509_L_FILE_LOAD, X509_L_ADD_DIR X509_L_ADD_STORE or   */
/*               X509_L_LOAD_STORE                                      */
/* @param argc   arguments for the control command                      */
/* @param argl   arguments for the control command                      */
/* @param **ret  return value of the control command                    */
/* @return WOLFSSL_SUCCESS on successful, othewise WOLFSSL_FAILURE      */
/* note: WOLFSSL_X509_L_ADD_STORE and WOLFSSL_X509_L_LOAD_STORE have not*/
/*       yet implemented. It retutns WOLFSSL_NOT_IMPLEMENTED            */
/*       when those control commands are passed.                        */
int wolfSSL_X509_LOOKUP_ctrl(WOLFSSL_X509_LOOKUP *ctx, int cmd,
        const char *argc, long argl, char **ret)
{
    int lret = WOLFSSL_FAILURE;

    WOLFSSL_ENTER("wolfSSL_X509_LOOKUP_ctrl");
#if !defined(NO_FILESYSTEM)
    if (ctx != NULL) {
        switch (cmd) {
        case WOLFSSL_X509_L_FILE_LOAD:
            /* expects to return a number of processed cert or crl file */
            lret = wolfSSL_X509_load_cert_crl_file(ctx, argc, (int)argl) > 0 ?
                            WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
            break;
        case WOLFSSL_X509_L_ADD_DIR:
            /* store directory loaction to use it later */
#if !defined(NO_WOLFSSL_DIR)
            lret = x509AddCertDir(ctx->dirs, argc, argl);
#else
            (void)x509AddCertDir;
            lret = WOLFSSL_NOT_IMPLEMENTED;
#endif
            break;
        case WOLFSSL_X509_L_ADD_STORE:
        case WOLFSSL_X509_L_LOAD_STORE:
            return WOLFSSL_NOT_IMPLEMENTED;

        default:
            break;
        }
    }
    (void)ret;
#else
    (void)ctx;
    (void)argc;
    (void)argl;
    (void)ret;
    (void)cmd;
    (void)x509AddCertDir;
    lret = WOLFSSL_NOT_IMPLEMENTED;
#endif
    return lret;
}


#if !defined(NO_CERTS) && defined(WOLFSSL_CERT_GEN)
static int wolfssl_x509_make_der(WOLFSSL_X509* x509, int req,
        unsigned char* der, int* derSz, int includeSig);
#endif

#ifndef NO_CERTS
#ifdef WOLFSSL_CERT_GEN
#ifndef NO_BIO
/* Converts the X509 to DER format and outputs it into bio.
 *
 * bio  is the structure to hold output DER
 * x509 certificate to create DER from
 * req  if set then a CSR is generated
 *
 * returns WOLFSSL_SUCCESS on success
 */
static int loadX509orX509REQFromBio(WOLFSSL_BIO* bio, WOLFSSL_X509* x509, int req)
{
    int ret = WOLFSSL_FAILURE;
    /* Get large buffer to hold cert der */
    int derSz = X509_BUFFER_SZ;
#ifdef WOLFSSL_SMALL_STACK
    byte* der;
#else
    byte der[X509_BUFFER_SZ];
#endif
    WOLFSSL_ENTER("wolfSSL_i2d_X509_bio");

    if (bio == NULL || x509 == NULL) {
        return WOLFSSL_FAILURE;
    }

#ifdef WOLFSSL_SMALL_STACK
    der = (byte*)XMALLOC(derSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (!der) {
        WOLFSSL_MSG("malloc failed");
        return WOLFSSL_FAILURE;
    }
#endif

    if (wolfssl_x509_make_der(x509, req, der, &derSz, 1) != WOLFSSL_SUCCESS) {
        goto cleanup;
    }

    if (wolfSSL_BIO_write(bio, der, derSz) != derSz) {
        goto cleanup;
    }

    ret = WOLFSSL_SUCCESS;
cleanup:
    #ifdef WOLFSSL_SMALL_STACK
    XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    #endif

    return ret;
}

/* Converts the X509 to DER format and outputs it into bio.
 *
 * bio  is the structure to hold output DER
 * x509 certificate to create DER from
 *
 * returns WOLFSSL_SUCCESS on success
 */
int wolfSSL_i2d_X509_bio(WOLFSSL_BIO* bio, WOLFSSL_X509* x509)
{
    return loadX509orX509REQFromBio(bio, x509, 0);
}

#ifdef WOLFSSL_CERT_REQ
int wolfSSL_i2d_X509_REQ_bio(WOLFSSL_BIO* bio, WOLFSSL_X509* x509)
{
    return loadX509orX509REQFromBio(bio, x509, 1);
}
#endif /* WOLFSSL_CERT_REQ */
#endif /* !NO_BIO */
#endif /* WOLFSSL_CERT_GEN */

/* Converts an internal structure to a DER buffer
 *
 * x509 structure to get DER buffer from
 * out  buffer to hold result. If NULL then *out is NULL then a new buffer is
 *      created.
 *
 * returns the size of the DER result on success
 */
int wolfSSL_i2d_X509(WOLFSSL_X509* x509, unsigned char** out)
{
    const unsigned char* der;
    int derSz = 0;

    WOLFSSL_ENTER("wolfSSL_i2d_X509");

    if (x509 == NULL) {
        WOLFSSL_LEAVE("wolfSSL_i2d_X509", BAD_FUNC_ARG);
        return BAD_FUNC_ARG;
    }

    der = wolfSSL_X509_get_der(x509, &derSz);
    if (der == NULL) {
        WOLFSSL_LEAVE("wolfSSL_i2d_X509", MEMORY_E);
        return MEMORY_E;
    }

    if (out != NULL && *out == NULL) {
        *out = (unsigned char*)XMALLOC(derSz, NULL, DYNAMIC_TYPE_OPENSSL);
        if (*out == NULL) {
            WOLFSSL_LEAVE("wolfSSL_i2d_X509", MEMORY_E);
            return MEMORY_E;
        }
    }

    if (out != NULL)
        XMEMCPY(*out, der, derSz);

    WOLFSSL_LEAVE("wolfSSL_i2d_X509", derSz);
    return derSz;
}

#ifndef NO_BIO
/**
 * Converts the DER from bio and creates a WOLFSSL_X509 structure from it.
 * @param bio  is the structure holding DER
 * @param x509 certificate to create from DER. Can be NULL
 * @param req  1 for a CSR and 0 for a x509 cert
 * @return pointer to WOLFSSL_X509 structure on success and NULL on fail
 */
static WOLFSSL_X509* d2i_X509orX509REQ_bio(WOLFSSL_BIO* bio,
                                            WOLFSSL_X509** x509, int req)
{
    WOLFSSL_X509* localX509 = NULL;
    byte* mem  = NULL;
    int    size;

    WOLFSSL_ENTER("wolfSSL_d2i_X509_bio");

    if (bio == NULL) {
        WOLFSSL_MSG("Bad Function Argument bio is NULL");
        return NULL;
    }

    size = wolfSSL_BIO_get_len(bio);
    if (size <= 0) {
        WOLFSSL_MSG("wolfSSL_BIO_get_len error. Possibly no pending data.");
        return NULL;
    }

    if (!(mem = (byte*)XMALLOC(size, NULL, DYNAMIC_TYPE_OPENSSL))) {
        WOLFSSL_MSG("malloc error");
        return NULL;
    }

    if ((size = wolfSSL_BIO_read(bio, mem, size)) == 0) {
        WOLFSSL_MSG("wolfSSL_BIO_read error");
        XFREE(mem, NULL, DYNAMIC_TYPE_OPENSSL);
        return NULL;
    }

    if (req) {
#ifdef WOLFSSL_CERT_REQ
        localX509 = wolfSSL_X509_REQ_d2i(NULL, mem, size);
#else
        WOLFSSL_MSG("CSR not compiled in");
#endif
    }
    else {
        localX509 = wolfSSL_X509_d2i(NULL, mem, size);
    }
    if (localX509 == NULL) {
        WOLFSSL_MSG("wolfSSL_X509_d2i error");
        XFREE(mem, NULL, DYNAMIC_TYPE_OPENSSL);
        return NULL;
    }

    if (x509 != NULL) {
        *x509 = localX509;
    }

    XFREE(mem, NULL, DYNAMIC_TYPE_OPENSSL);
    return localX509;
}

WOLFSSL_X509* wolfSSL_d2i_X509_bio(WOLFSSL_BIO* bio, WOLFSSL_X509** x509)
{
    return d2i_X509orX509REQ_bio(bio, x509, 0);
}

#ifdef WOLFSSL_CERT_REQ
WOLFSSL_X509* wolfSSL_d2i_X509_REQ_bio(WOLFSSL_BIO* bio, WOLFSSL_X509** x509)
{
    return d2i_X509orX509REQ_bio(bio, x509, 1);
}
#endif
#endif /* !NO_BIO */


#if !defined(NO_ASN) && !defined(NO_PWDBASED)
/* Copies unencrypted DER key buffer into "der". If "der" is null then the size
 * of buffer needed is returned. If *der == NULL then it allocates a buffer.
 * NOTE: This also advances the "der" pointer to be at the end of buffer.
 *
 * Returns size of key buffer on success
 */
int wolfSSL_i2d_PrivateKey(const WOLFSSL_EVP_PKEY* key, unsigned char** der)
{
    return wolfSSL_EVP_PKEY_get_der(key, der);
}

#endif /* !NO_ASN && !NO_PWDBASED */




#endif /* !NO_CERTS */
#endif /* OPENSSL_EXTRA */

#ifdef OPENSSL_EXTRA
#ifndef NO_CERTS
/* Use the public key to verify the signature. Note: this only verifies
 * the certificate signature.
 * returns WOLFSSL_SUCCESS on successful signature verification */
static int verifyX509orX509REQ(WOLFSSL_X509* x509, WOLFSSL_EVP_PKEY* pkey, int req)
{
    int ret;
    const byte* der;
    int derSz = 0;
    int type;

    (void)req;

    if (x509 == NULL || pkey == NULL) {
        return WOLFSSL_FATAL_ERROR;
    }

    der = wolfSSL_X509_get_der(x509, &derSz);
    if (der == NULL) {
        WOLFSSL_MSG("Error getting WOLFSSL_X509 DER");
        return WOLFSSL_FATAL_ERROR;
    }

    switch (pkey->type) {
        case EVP_PKEY_RSA:
            type = RSAk;
            break;

        case EVP_PKEY_EC:
            type = ECDSAk;
            break;

        case EVP_PKEY_DSA:
            type = DSAk;
            break;

        default:
            WOLFSSL_MSG("Unknown pkey key type");
            return WOLFSSL_FATAL_ERROR;
    }

#ifdef WOLFSSL_CERT_REQ
    if (req)
        ret = CheckCSRSignaturePubKey(der, derSz, x509->heap,
                (unsigned char*)pkey->pkey.ptr, pkey->pkey_sz, type);
    else
#endif
        ret = CheckCertSignaturePubKey(der, derSz, x509->heap,
                (unsigned char*)pkey->pkey.ptr, pkey->pkey_sz, type);
    if (ret == 0) {
        return WOLFSSL_SUCCESS;
    }
    return WOLFSSL_FAILURE;
}

int wolfSSL_X509_verify(WOLFSSL_X509* x509, WOLFSSL_EVP_PKEY* pkey)
{
    return verifyX509orX509REQ(x509, pkey, 0);
}

#ifdef WOLFSSL_CERT_REQ
int wolfSSL_X509_REQ_verify(WOLFSSL_X509* x509, WOLFSSL_EVP_PKEY* pkey)
{
    return verifyX509orX509REQ(x509, pkey, 1);
}
#endif /* WOLFSSL_CERT_REQ */
#endif /* !NO_CERTS */

#if !defined(NO_FILESYSTEM)
static void *wolfSSL_d2i_X509_fp_ex(XFILE file, void **x509, int type)
{
    void *newx509 = NULL;
    byte *fileBuffer = NULL;
    long sz = 0;

    /* init variable */
    if (x509)
        *x509 = NULL;

    /* argument check */
    if (file == XBADFILE) {
        return NULL;
    }

    /* determine file size */
    if (XFSEEK(file, 0, XSEEK_END) != 0) {
        return NULL;
    }
    sz = XFTELL(file);
    XREWIND(file);

    if (sz > MAX_WOLFSSL_FILE_SIZE || sz <= 0) {
        WOLFSSL_MSG("d2i_X509_fp_ex file size error");
        return NULL;
    }

    fileBuffer = (byte *)XMALLOC(sz, NULL, DYNAMIC_TYPE_FILE);
    if (fileBuffer != NULL) {
        if ((long)XFREAD(fileBuffer, 1, sz, file) != sz) {
            WOLFSSL_MSG("File read failed");
            goto err_exit;
        }
        if (type == CERT_TYPE) {
            newx509 = (void *)wolfSSL_X509_d2i(NULL, fileBuffer, (int)sz);
        }
    #ifdef HAVE_CRL
        else if (type == CRL_TYPE) {
            newx509 = (void *)wolfSSL_d2i_X509_CRL(NULL, fileBuffer, (int)sz);
        }
    #endif
    #if !defined(NO_ASN) && !defined(NO_PWDBASED) && defined(HAVE_PKCS12)
        else if (type == PKCS12_TYPE) {
            if ((newx509 = wc_PKCS12_new()) == NULL) {
                goto err_exit;
            }
            if (wc_d2i_PKCS12(fileBuffer, (int)sz, (WC_PKCS12*)newx509) < 0) {
                goto err_exit;
            }
        }
    #endif
        else {
            goto err_exit;
        }
        if (newx509 == NULL) {
            WOLFSSL_MSG("X509 failed");
            goto err_exit;
        }
    }

    if (x509)
        *x509 = newx509;

    goto _exit;

err_exit:
#if !defined(NO_ASN) && !defined(NO_PWDBASED) && defined(HAVE_PKCS12)
    if ((newx509 != NULL) && (type == PKCS12_TYPE)) {
        wc_PKCS12_free((WC_PKCS12*)newx509);
        newx509 = NULL;
    }
#endif
_exit:
    if (fileBuffer != NULL)
        XFREE(fileBuffer, NULL, DYNAMIC_TYPE_FILE);

    return newx509;
}

WOLFSSL_X509 *wolfSSL_d2i_X509_fp(XFILE fp, WOLFSSL_X509 **x509)
{
    WOLFSSL_ENTER("wolfSSL_d2i_X509_fp");
    return (WOLFSSL_X509 *)wolfSSL_d2i_X509_fp_ex(fp, (void **)x509, CERT_TYPE);
}
/* load certificate or CRL file, and add it to the STORE           */
/* @param ctx    a pointer to X509_LOOKUP structure                */
/* @param file   file name to load                                 */
/* @param type   WOLFSSL_FILETYPE_PEM or WOLFSSL_FILETYPE_ASN1     */
/* @return a number of loading CRL or certificate, otherwise zero  */
WOLFSSL_API int wolfSSL_X509_load_cert_crl_file(WOLFSSL_X509_LOOKUP *ctx,
    const char *file, int type)
{
    STACK_OF(WOLFSSL_X509_INFO) *info;
    WOLFSSL_X509_INFO *info_tmp;
    WOLFSSL_BIO *bio;
    WOLFSSL_X509 *x509 = NULL;

    int i;
    int cnt = 0;
    int num = 0;

    WOLFSSL_ENTER("wolfSSL_X509_load_cert_crl_file");
    
    /* stanity check */
    if (ctx == NULL || file == NULL) {
        WOLFSSL_MSG("bad arguments");
        return 0;
    }
    
    if (type != WOLFSSL_FILETYPE_PEM) {
        x509 = wolfSSL_X509_load_certificate_file(file, type);
        if (x509 != NULL) {
            if (wolfSSL_X509_STORE_add_cert(ctx->store, x509) 
                                    == WOLFSSL_SUCCESS) {
                cnt++;
            } else {
                WOLFSSL_MSG("wolfSSL_X509_STORE_add_cert error");
            }
            wolfSSL_X509_free(x509);
            x509 = NULL;
        } else {
            WOLFSSL_MSG("wolfSSL_X509_load_certificate_file error");
        }

    } else {
#ifdef OPENSSL_ALL
        bio = wolfSSL_BIO_new_file(file, "rb");
        if(!bio) {
            WOLFSSL_MSG("wolfSSL_BIO_new error");
            return cnt;
        }
        
        info = wolfSSL_PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL);

        wolfSSL_BIO_free(bio);

        if (!info) {
            WOLFSSL_MSG("wolfSSL_PEM_X509_INFO_read_bio error");
            return cnt;
        }
        num = wolfSSL_sk_X509_INFO_num(info);
        for (i=0; i < num; i++) {
            info_tmp = wolfSSL_sk_X509_INFO_value(info, i);

            if (info_tmp->x509) {
                if(wolfSSL_X509_STORE_add_cert(ctx->store, info_tmp->x509) ==
                    WOLFSSL_SUCCESS) {
                    cnt ++;
                } else { 
                    WOLFSSL_MSG("wolfSSL_X509_STORE_add_cert failed");
                }
            }
#ifdef HAVE_CRL
            if (info_tmp->crl) {
                if(wolfSSL_X509_STORE_add_crl(ctx->store, info_tmp->crl) ==
                    WOLFSSL_SUCCESS) {
                    cnt ++;
                } else {
                    WOLFSSL_MSG("wolfSSL_X509_STORE_add_crl failed");
                }
            }
#endif
        }
        wolfSSL_sk_X509_INFO_pop_free(info, X509_INFO_free);
#else
    (void)i;
    (void)cnt;
    (void)num;
    (void)info_tmp;
    (void)info;
    (void)bio;
#endif
    }

    WOLFSSL_LEAVE("wolfSSL_X509_load_ceretificate_crl_file", cnt);
    return cnt;
}
#endif /* !NO_FILESYSTEM */


#ifdef HAVE_CRL

#ifndef NO_BIO
WOLFSSL_API WOLFSSL_X509_CRL *wolfSSL_d2i_X509_CRL_bio(WOLFSSL_BIO *bp, 
                                                    WOLFSSL_X509_CRL **x)
{
    int derSz;
    byte* der = NULL;
    WOLFSSL_X509_CRL* crl = NULL;
    
    if (bp == NULL)
        return NULL;
    
    if ((derSz = wolfSSL_BIO_get_len(bp)) > 0) {
        der = (byte*)XMALLOC(derSz, 0, DYNAMIC_TYPE_DER);
        if (der != NULL) {
            if (wolfSSL_BIO_read(bp, der, derSz) == derSz) {
                crl = wolfSSL_d2i_X509_CRL(x, der, derSz);
            }
        }
    }
    
    if (der != NULL) {
        XFREE(der, 0, DYNAMIC_TYPE_DER);
    }
    
    return crl;
}
#endif

#ifndef NO_FILESYSTEM
WOLFSSL_X509_CRL *wolfSSL_d2i_X509_CRL_fp(XFILE fp, WOLFSSL_X509_CRL **crl)
{
    WOLFSSL_ENTER("wolfSSL_d2i_X509_CRL_fp");
    return (WOLFSSL_X509_CRL *)wolfSSL_d2i_X509_fp_ex(fp, (void **)crl, CRL_TYPE);
}

/* Read CRL file, and add it to store and corresponding cert manager    */
/* @param ctx   a pointer of X509_LOOKUP back to the X509_STORE         */
/* @param file  a file to read                                          */
/* @param type  WOLFSSL_FILETYPE_PEM or WOLFSSL_FILETYPE_ASN1           */
/* @return WOLFSSL_SUCCESS(1) on successful, othewise WOLFSSL_FAILURE(0)*/
WOLFSSL_API int wolfSSL_X509_load_crl_file(WOLFSSL_X509_LOOKUP *ctx,
                                             const char *file, int type)
{
    int ret = WOLFSSL_FAILURE;
    int count = 0;
    WOLFSSL_BIO *bio = NULL;
    WOLFSSL_X509_CRL *crl = NULL;

    WOLFSSL_ENTER("wolfSSL_X509_load_crl_file");
    
    if (ctx == NULL || file == NULL)
        return ret;

    if ((bio = wolfSSL_BIO_new(wolfSSL_BIO_s_file())) == NULL)
        return ret;
    
    if (wolfSSL_BIO_read_filename(bio, file) <= 0) {
        wolfSSL_BIO_free(bio);
        return ret;
    }

    if (wolfSSL_BIO_read_filename(bio, file) <= 0) {
        wolfSSL_BIO_free(bio);
        return ret;
    }

    if (type == WOLFSSL_FILETYPE_PEM) {
        do {
            crl = wolfSSL_PEM_read_bio_X509_CRL(bio, NULL, NULL, NULL);
            if (crl == NULL) {
                if (count <= 0) {
                    WOLFSSL_MSG("Load crl failed");
                }
                break;
            }

            ret = wolfSSL_X509_STORE_add_crl(ctx->store, crl);
            if (ret == WOLFSSL_FAILURE) {
                WOLFSSL_MSG("Adding crl failed");
                break;
            }
            count++;
            wolfSSL_X509_CRL_free(crl);
            crl = NULL;
        }   while(crl == NULL);

        ret = count;
    } else if (type == WOLFSSL_FILETYPE_ASN1) {
        crl = wolfSSL_d2i_X509_CRL_bio(bio, NULL);
        if (crl == NULL) {
            WOLFSSL_MSG("Load crl failed");
        } else {
            ret = wolfSSL_X509_STORE_add_crl(ctx->store, crl);
            if (ret == WOLFSSL_FAILURE) {
                WOLFSSL_MSG("Adding crl failed");
            } else {
                ret = 1;/* handled a file */
            }
        }
    } else {
        WOLFSSL_MSG("Invalid file type");
    }

    wolfSSL_X509_CRL_free(crl);
    wolfSSL_BIO_free(bio);

    WOLFSSL_LEAVE("wolfSSL_X509_load_crl_file", ret);
    return ret;
}
#endif /* !NO_FILESYSTEM */


WOLFSSL_X509_CRL* wolfSSL_d2i_X509_CRL(WOLFSSL_X509_CRL** crl,
        const unsigned char* in, int len)
{
    WOLFSSL_X509_CRL *newcrl = NULL;
    int ret = WOLFSSL_SUCCESS;

    WOLFSSL_ENTER("wolfSSL_d2i_X509_CRL");

    if (in == NULL) {
        WOLFSSL_MSG("Bad argument value");
    } else {
        newcrl =(WOLFSSL_X509_CRL*)XMALLOC(sizeof(WOLFSSL_X509_CRL), NULL,
                DYNAMIC_TYPE_CRL);
        if (newcrl == NULL){
            WOLFSSL_MSG("New CRL allocation failed");
        } else {
            ret = InitCRL(newcrl, NULL);
            if (ret < 0) {
                WOLFSSL_MSG("Init tmp CRL failed");
            } else {
                ret = BufferLoadCRL(newcrl, in, len, WOLFSSL_FILETYPE_ASN1,
                    NO_VERIFY);
                if (ret != WOLFSSL_SUCCESS) {
                    WOLFSSL_MSG("Buffer Load CRL failed");
                } else {
                    if (crl) {
                        *crl = newcrl;
                    }
                }
            }
        }
    }

    if((ret != WOLFSSL_SUCCESS) && (newcrl != NULL)) {
        wolfSSL_X509_CRL_free(newcrl);
        newcrl = NULL;
    }

    return newcrl;
}
#endif /* HAVE_CRL */
#endif /* OPENSSL_EXTRA */

#if defined(HAVE_CRL) && (defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL))
void wolfSSL_X509_CRL_free(WOLFSSL_X509_CRL *crl)
{
    WOLFSSL_ENTER("wolfSSL_X509_CRL_free");

    if (crl)
        FreeCRL(crl, 1);
}
#endif /* HAVE_CRL && (OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL) */

#ifdef OPENSSL_EXTRA
#ifndef NO_WOLFSSL_STUB
WOLFSSL_ASN1_TIME* wolfSSL_X509_CRL_get_lastUpdate(WOLFSSL_X509_CRL* crl)
{
    (void)crl;
    WOLFSSL_STUB("X509_CRL_get_lastUpdate");
    return 0;
}
#endif
#ifndef NO_WOLFSSL_STUB
WOLFSSL_ASN1_TIME* wolfSSL_X509_CRL_get_nextUpdate(WOLFSSL_X509_CRL* crl)
{
    (void)crl;
    WOLFSSL_STUB("X509_CRL_get_nextUpdate");
    return 0;
}
#endif


#ifndef NO_WOLFSSL_STUB
int wolfSSL_X509_CRL_verify(WOLFSSL_X509_CRL* crl, WOLFSSL_EVP_PKEY* key)
{
    (void)crl;
    (void)key;
    WOLFSSL_STUB("X509_CRL_verify");
    return 0;
}
#endif
#endif /* OPENSSL_EXTRA */

#ifdef OPENSSL_EXTRA

#ifndef NO_WOLFSSL_STUB
/* Returns default file name and path of config file. However
   a wolfssl.cnf file is not currently supported */
char* wolfSSL_CONF_get1_default_config_file(void)
{
    WOLFSSL_ENTER("wolfSSL_CONF_get1_default_config_file");
    WOLFSSL_STUB("CONF_get1_default_config_file");
    return NULL;
}
#endif


WOLFSSL_X509_VERIFY_PARAM* wolfSSL_X509_VERIFY_PARAM_new(void)
{
    WOLFSSL_X509_VERIFY_PARAM *param = NULL;
    param = (WOLFSSL_X509_VERIFY_PARAM*)XMALLOC(
            sizeof(WOLFSSL_X509_VERIFY_PARAM), NULL, DYNAMIC_TYPE_OPENSSL);
    if (param != NULL)
        XMEMSET(param, 0, sizeof(WOLFSSL_X509_VERIFY_PARAM ));

    return(param);
}


void wolfSSL_X509_VERIFY_PARAM_free(WOLFSSL_X509_VERIFY_PARAM *param)
{
    if (param != NULL)
        XFREE(param, NULL, DYNAMIC_TYPE_OPENSSL);
}


/* Sets flags by OR'ing with existing value. */
int wolfSSL_X509_VERIFY_PARAM_set_flags(WOLFSSL_X509_VERIFY_PARAM *param,
        unsigned long flags)
{
    int ret = WOLFSSL_FAILURE;

    if (param != NULL) {
        param->flags |= flags;
        ret = WOLFSSL_SUCCESS;
    }

    return ret;
}


int wolfSSL_X509_VERIFY_PARAM_get_flags(WOLFSSL_X509_VERIFY_PARAM *param)
{
    int ret = 0;

    if (param != NULL) {
        ret = (int)param->flags;
    }

    return ret;
}


int wolfSSL_X509_VERIFY_PARAM_clear_flags(WOLFSSL_X509_VERIFY_PARAM *param,
        unsigned long flags)
{
    int ret = WOLFSSL_FAILURE;

    if (param != NULL) {
        param->flags &= ~flags;
        ret = WOLFSSL_SUCCESS;
    }

    return ret;
}


/* inherits properties of param "to" to param "from"
* 
* WOLFSSL_VPARAM_DEFAULT          any values in "src" is copied
*                                 if "src" value is new for "to".
* WOLFSSL_VPARAM_OVERWRITE        all values of "form" are copied to "to"
* WOLFSSL_VPARAM_RESET_FLAGS      the flag values are copied, not Ored
* WOLFSSL_VPARAM_LOCKED           don't copy any values
* WOLFSSL_VPARAM_ONCE             the current inherit_flags is zerroed
*/
static int wolfSSL_X509_VERIFY_PARAM_inherit(WOLFSSL_X509_VERIFY_PARAM *to,
                                         const WOLFSSL_X509_VERIFY_PARAM *from)
{
    int ret = WOLFSSL_FAILURE;
    int isOverWrite = 0;
    int isDefault = 0;
    unsigned int flags;
    
    /* sanity check */
    if (!to || !from) {
        /* be compatible to openssl return value */
        return WOLFSSL_SUCCESS;
    }
    flags = to->inherit_flags | from->inherit_flags;

    if (flags & WOLFSSL_VPARAM_LOCKED) {
        return WOLFSSL_SUCCESS;
    }

    if (flags & WOLFSSL_VPARAM_ONCE) {
        to->inherit_flags = 0;
    }
    
    isOverWrite = (flags & WOLFSSL_VPARAM_OVERWRITE); 
    isDefault = (flags & WOLFSSL_VPARAM_DEFAULT);

    /* copy check_time if check time is not set */
    if ((to->flags & WOLFSSL_USE_CHECK_TIME) == 0 || isOverWrite) {
           to->check_time = from->check_time;
           to->flags &= ~WOLFSSL_USE_CHECK_TIME;
    }
    /* host name */
    if (isOverWrite || 
        (from->hostName[0] != 0 && (to->hostName[0] == 0 || isDefault))) {
            if (!(ret = wolfSSL_X509_VERIFY_PARAM_set1_host(to, from->hostName,
                (int)XSTRLEN(from->hostName))))
                return ret; 
        to->hostFlags = from->hostFlags;
    }
    /* ip ascii */
    if (isOverWrite ||
        (from->ipasc[0] != 0 && (to->ipasc[0] == 0 || isDefault))) {
           
            if (!(ret = wolfSSL_X509_VERIFY_PARAM_set1_ip_asc(to, from->ipasc)))
                return ret;
    }

    if (flags & WOLFSSL_VPARAM_RESET_FLAGS)
        to->flags = 0;

    to->flags |= from->flags;

    return ret;
}
/******************************************************************************
* wolfSSL_X509_VERIFY_PARAM_set1_host - sets the DNS hostname to name
* hostnames is cleared if name is NULL or empty.
*
* RETURNS:
*
*/
int wolfSSL_X509_VERIFY_PARAM_set1_host(WOLFSSL_X509_VERIFY_PARAM* pParam,
                                         const char* name,
                                         unsigned int nameSz)
{
    unsigned int sz = 0;

    if (pParam == NULL)
        return WOLFSSL_FAILURE;

    XMEMSET(pParam->hostName, 0, WOLFSSL_HOST_NAME_MAX);

    if (name == NULL)
        return WOLFSSL_SUCCESS;

    sz = (unsigned int)XSTRLEN(name);

    /* If name is NUL-terminated, namelen can be set to zero. */
    if(nameSz == 0 || nameSz > sz)
        nameSz = sz;

    if (nameSz > 0 && name[nameSz - 1] == '\0')
        nameSz--;

    if (nameSz > WOLFSSL_HOST_NAME_MAX-1)
        nameSz = WOLFSSL_HOST_NAME_MAX-1;

    if (nameSz > 0)
        XMEMCPY(pParam->hostName, name, nameSz);

    pParam->hostName[nameSz] = '\0';

    return WOLFSSL_SUCCESS;
}
/******************************************************************************
* wolfSSL_CTX_set1_param - set a pointer to the SSL verification parameters
*
* RETURNS:
*   WOLFSSL_SUCCESS on success, otherwise returns WOLFSSL_FAILURE
*   Note: Returns WOLFSSL_SUCCESS, in case either parameter is NULL,
*   same as openssl.
*/
int wolfSSL_CTX_set1_param(WOLFSSL_CTX* ctx, WOLFSSL_X509_VERIFY_PARAM *vpm)
{
    if (ctx == NULL || vpm == NULL)
        return WOLFSSL_SUCCESS;

    return wolfSSL_X509_VERIFY_PARAM_set1(ctx->param, vpm);
}

/******************************************************************************
* wolfSSL_CTX/_get0_param - return a pointer to the SSL verification parameters
*
* RETURNS:
* returns pointer to the SSL verification parameters on success,
* otherwise returns NULL
*/
WOLFSSL_X509_VERIFY_PARAM* wolfSSL_CTX_get0_param(WOLFSSL_CTX* ctx)
{
    if (ctx == NULL) {
        return NULL;
    }

    return ctx->param;
}

WOLFSSL_X509_VERIFY_PARAM* wolfSSL_get0_param(WOLFSSL* ssl)
{
    if (ssl == NULL) {
        return NULL;
    }
    return ssl->param;
}

/* Set VERIFY PARAM from "from" pointer to "to" pointer */
int wolfSSL_X509_VERIFY_PARAM_set1(WOLFSSL_X509_VERIFY_PARAM *to, 
                                   const WOLFSSL_X509_VERIFY_PARAM *from)
{
    int ret = WOLFSSL_FAILURE;
    unsigned int _inherit_flags;
    
    if (!to) {
        return ret;
    }
    /* keeps the inherit flags for save */
    _inherit_flags = to->inherit_flags;

    /* Ored DEFAULT inherit flag proerty to copy "from" contents to "to"
    *  contents 
    */
    to->inherit_flags |= WOLFSSL_VPARAM_DEFAULT;

    ret = wolfSSL_X509_VERIFY_PARAM_inherit(to, from);

    /* restore inherit flag */
    to->inherit_flags = _inherit_flags;

    return ret;   
}

/* Set the host flag in the X509_VERIFY_PARAM structure */
void wolfSSL_X509_VERIFY_PARAM_set_hostflags(WOLFSSL_X509_VERIFY_PARAM* param,
                                             unsigned int flags)
{
    if (param != NULL) {
        param->hostFlags = flags;
    }
}

/* Sets the expected IP address to ipasc.
 *
 * param is a pointer to the X509_VERIFY_PARAM structure
 * ipasc is a NULL-terminated string with N.N.N.N for IPv4 and
 *       HH:HH ... HH:HH for IPv6. There is no validation performed on the
 *       parameter, and it must be an exact match with the IP in the cert.
 *
 * return 1 for success and 0 for failure*/
int wolfSSL_X509_VERIFY_PARAM_set1_ip_asc(WOLFSSL_X509_VERIFY_PARAM *param,
        const char *ipasc)
{
    int ret = WOLFSSL_FAILURE;

    if (param != NULL) {
        if (ipasc == NULL) {
            param->ipasc[0] = '\0';
        }
        else {
            XSTRNCPY(param->ipasc, ipasc, WOLFSSL_MAX_IPSTR - 1);
            param->ipasc[WOLFSSL_MAX_IPSTR-1] = '\0';
        }
        ret = WOLFSSL_SUCCESS;
    }

    return ret;
}

#ifndef NO_WOLFSSL_STUB
void wolfSSL_X509_OBJECT_free_contents(WOLFSSL_X509_OBJECT* obj)
{
    (void)obj;
    WOLFSSL_STUB("X509_OBJECT_free_contents");
}
#endif

#ifndef NO_ASN_TIME
int wolfSSL_X509_cmp_current_time(const WOLFSSL_ASN1_TIME* asnTime)
{
    return wolfSSL_X509_cmp_time(asnTime, NULL);
}

/* return -1 if asnTime is earlier than or equal to cmpTime, and 1 otherwise
 * return 0 on error
 */
int wolfSSL_X509_cmp_time(const WOLFSSL_ASN1_TIME* asnTime, time_t* cmpTime)
{
    int ret = WOLFSSL_FAILURE, i = 0;
    time_t tmpTime, *pTime = &tmpTime;
    byte data_ptr[MAX_TIME_STRING_SZ], inv = 0;
    struct tm ts, *tmpTs, *ct;
#if defined(NEED_TMP_TIME)
    /* for use with gmtime_r */
    struct tm tmpTimeStorage;

    tmpTs = &tmpTimeStorage;
#else
    tmpTs = NULL;
#endif
    (void)tmpTs;

    if (asnTime == NULL) {
        return WOLFSSL_FAILURE;
    }

    if (cmpTime == NULL) {
        /* Use current time */
        *pTime = XTIME(0);
    }
    else {
        pTime = cmpTime;
    }

    /* Convert ASN1_time to time_t */
    XMEMSET(&ts, 0, sizeof(struct tm));

    /* Check type */
    if (asnTime->type == ASN_UTC_TIME) {
        /* 2-digit year */
        XMEMCPY(data_ptr, &asnTime->data[i], ASN_UTC_TIME_SIZE);
        ts.tm_year = (data_ptr[i] - '0') * 10; i++;
        ts.tm_year += data_ptr[i] - '0'; i++;
        if (ts.tm_year < 70) {
            ts.tm_year += 100;
        }
    }
    else if (asnTime->type == ASN_GENERALIZED_TIME) {
        /* 4-digit year */
        XMEMCPY(data_ptr, &asnTime->data[i], ASN_GENERALIZED_TIME_SIZE);
        ts.tm_year = (data_ptr[i] - '0') * 1000; i++;
        ts.tm_year += (data_ptr[i] - '0') * 100; i++;
        ts.tm_year += (data_ptr[i] - '0') * 10; i++;
        ts.tm_year += data_ptr[i] - '0'; i++;
        ts.tm_year -= 1900;
    }
    else {
        /* Invalid type */
        inv = 1;
    }

    if (inv != 1) {
        ts.tm_mon = (data_ptr[i] - '0') * 10; i++;
        ts.tm_mon += (data_ptr[i] - '0') - 1; i++; /* January is 0 not 1 */
        ts.tm_mday = (data_ptr[i] - '0') * 10; i++;
        ts.tm_mday += (data_ptr[i] - '0'); i++;
        ts.tm_hour = (data_ptr[i] - '0') * 10; i++;
        ts.tm_hour += (data_ptr[i] - '0'); i++;
        ts.tm_min = (data_ptr[i] - '0') * 10; i++;
        ts.tm_min += (data_ptr[i] - '0'); i++;
        ts.tm_sec = (data_ptr[i] - '0') * 10; i++;
        ts.tm_sec += (data_ptr[i] - '0');

        /* Convert to time struct*/
        ct = XGMTIME(pTime, tmpTs);

        if (ct == NULL)
            return GETTIME_ERROR;

        /* DateGreaterThan returns 1 for >; 0 for <= */
        ret = DateGreaterThan(&ts, ct) ? 1 : -1;
    }

    return ret;
}
#endif /* !NO_ASN_TIME */

#if (defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)) && \
    !defined(NO_ASN_TIME) && !defined(USER_TIME) && !defined(TIME_OVERRIDES)
WOLFSSL_ASN1_TIME *wolfSSL_X509_time_adj_ex(WOLFSSL_ASN1_TIME *asnTime,
    int offset_day, long offset_sec, time_t *in_tm)
{
    /* get current time if in_tm is null */
    time_t t = in_tm ? *in_tm : XTIME(0);
    return wolfSSL_ASN1_TIME_adj(asnTime, t, offset_day, offset_sec);
}

WOLFSSL_ASN1_TIME *wolfSSL_X509_time_adj(WOLFSSL_ASN1_TIME *asnTime,
    long offset_sec, time_t *in_tm)
{
    return wolfSSL_X509_time_adj_ex(asnTime, 0, offset_sec, in_tm);
}
#endif

#ifndef NO_WOLFSSL_STUB
int wolfSSL_sk_X509_REVOKED_num(WOLFSSL_X509_REVOKED* revoked)
{
    (void)revoked;
    WOLFSSL_STUB("sk_X509_REVOKED_num");
    return 0;
}
#endif

#ifndef NO_WOLFSSL_STUB
WOLFSSL_X509_REVOKED* wolfSSL_X509_CRL_get_REVOKED(WOLFSSL_X509_CRL* crl)
{
    (void)crl;
    WOLFSSL_STUB("X509_CRL_get_REVOKED");
    return 0;
}
#endif

#ifndef NO_WOLFSSL_STUB
WOLFSSL_X509_REVOKED* wolfSSL_sk_X509_REVOKED_value(
                                    WOLFSSL_X509_REVOKED* revoked, int value)
{
    (void)revoked;
    (void)value;
    WOLFSSL_STUB("sk_X509_REVOKED_value");
    return 0;
}
#endif

#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
/* Used to create a new WOLFSSL_ASN1_INTEGER structure.
 * returns a pointer to new structure on success and NULL on failure
 */
WOLFSSL_ASN1_INTEGER* wolfSSL_ASN1_INTEGER_new(void)
{
    WOLFSSL_ASN1_INTEGER* a;

    a = (WOLFSSL_ASN1_INTEGER*)XMALLOC(sizeof(WOLFSSL_ASN1_INTEGER), NULL,
                                       DYNAMIC_TYPE_OPENSSL);
    if (a == NULL) {
        return NULL;
    }

    XMEMSET(a, 0, sizeof(WOLFSSL_ASN1_INTEGER));
    a->data    = a->intData;
    a->dataMax = WOLFSSL_ASN1_INTEGER_MAX;
    a->length  = 0;
    return a;
}


/* free's internal elements of WOLFSSL_ASN1_INTEGER and free's "in" itself */
void wolfSSL_ASN1_INTEGER_free(WOLFSSL_ASN1_INTEGER* in)
{
    if (in != NULL) {
        if (in->isDynamic) {
            XFREE(in->data, NULL, DYNAMIC_TYPE_OPENSSL);
        }
        XFREE(in, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}


/* Duplicate all WOLFSSL_ASN1_INTEGER members from src to dup
 *  src : WOLFSSL_ASN1_INTEGER to duplicate
 *  Returns pointer to duplicate WOLFSSL_ASN1_INTEGER
 */
WOLFSSL_ASN1_INTEGER* wolfSSL_ASN1_INTEGER_dup(const WOLFSSL_ASN1_INTEGER* src)
{
    WOLFSSL_ASN1_INTEGER* copy;
    WOLFSSL_ENTER("wolfSSL_ASN1_INTEGER_dup");
    if (!src)
        return NULL;

    copy = wolfSSL_ASN1_INTEGER_new();

    if (copy == NULL)
        return NULL;

    copy->negative  = src->negative;
    copy->dataMax   = src->dataMax;
    copy->isDynamic = src->isDynamic;
#if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
    copy->length    = src->length;
#endif
    XSTRNCPY((char*)copy->intData,(const char*)src->intData,WOLFSSL_ASN1_INTEGER_MAX);

    if (copy->isDynamic && src->data && copy->dataMax) {
        copy->data = (unsigned char*)
            XMALLOC(src->dataMax,NULL,DYNAMIC_TYPE_OPENSSL);
        if (copy->data == NULL) {
            wolfSSL_ASN1_INTEGER_free(copy);
            return NULL;
        }
        XMEMCPY(copy->data, src->data, copy->dataMax);
    }
    return copy;
}


/* sets the value of WOLFSSL_ASN1_INTEGER a to the long value v. */
int wolfSSL_ASN1_INTEGER_set(WOLFSSL_ASN1_INTEGER *a, long v)
{
    int ret = WOLFSSL_SUCCESS; /* return 1 for success and 0 for failure */
    int j;
    unsigned int i = 0;
    unsigned char tmp[sizeof(long)+1] = {0};

    if (a != NULL) {
        /* dynamically create data buffer, +2 for type and length */
        a->data = (unsigned char*)XMALLOC((sizeof(long)+1) + 2, NULL,
                DYNAMIC_TYPE_OPENSSL);
        if (a->data == NULL) {
            wolfSSL_ASN1_INTEGER_free(a);
            ret = WOLFSSL_FAILURE;
        }
        else {
            a->dataMax   = (int)(sizeof(long)+1) + 2;
            a->isDynamic = 1;
        }
    }
    else {
        /* Invalid parameter */
        ret = WOLFSSL_FAILURE;
    }


    if (ret != WOLFSSL_FAILURE) {
        /* Set type */
        a->data[i++] = ASN_INTEGER;

        /* Check for negative */
        if (v < 0) {
            a->negative = 1;
            v *= -1;
        }

        /* Create char buffer */
        for (j = 0; j < (int)sizeof(long); j++) {
            if (v == 0) {
                break;
            }
            tmp[j] = (unsigned char)(v & 0xff);
            v >>= 8;
        }

        /* Set length */
        a->data[i++] = (unsigned char)((j == 0) ? ++j : j);
        /* +2 for type and length */
        a->length = j + 2;

        /* Copy to data */
        for (; j > 0; j--) {
            a->data[i++] = tmp[j-1];
        }
    }

    return ret;
}


WOLFSSL_ASN1_INTEGER* wolfSSL_X509_get_serialNumber(WOLFSSL_X509* x509)
{
    WOLFSSL_ASN1_INTEGER* a;
    int i = 0;

    WOLFSSL_ENTER("wolfSSL_X509_get_serialNumber");

    if (x509 == NULL) {
        WOLFSSL_MSG("NULL function argument");
        return NULL;
    }

    if (x509->serialNumber != NULL)
       return x509->serialNumber;

    a = wolfSSL_ASN1_INTEGER_new();
    if (a == NULL)
        return NULL;

    /* Make sure there is space for the data, ASN.1 type and length. */
    if (x509->serialSz > (WOLFSSL_ASN1_INTEGER_MAX - 2)) {
        /* dynamically create data buffer, +2 for type and length */
        a->data = (unsigned char*)XMALLOC(x509->serialSz + 2, NULL,
                DYNAMIC_TYPE_OPENSSL);
        if (a->data == NULL) {
            wolfSSL_ASN1_INTEGER_free(a);
            return NULL;
        }
        a->dataMax   = x509->serialSz + 2;
        a->isDynamic = 1;
    } else {
        /* Use array instead of dynamic memory */
        a->data    = a->intData;
        a->dataMax = WOLFSSL_ASN1_INTEGER_MAX;
    }

    #ifdef WOLFSSL_QT
        XMEMCPY(&a->data[i], x509->serial, x509->serialSz);
        a->length = x509->serialSz;
    #else
        a->data[i++] = ASN_INTEGER;
        i += SetLength(x509->serialSz, a->data + i);
        XMEMCPY(&a->data[i], x509->serial, x509->serialSz);
        a->length = x509->serialSz + 2;
    #endif

    x509->serialNumber = a;

    return a;
}

#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#if defined(WOLFSSL_MYSQL_COMPATIBLE) || defined(WOLFSSL_NGINX) || \
    defined(WOLFSSL_HAPROXY) || defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)
#ifndef NO_ASN_TIME
#ifndef NO_BIO
int wolfSSL_ASN1_TIME_print(WOLFSSL_BIO* bio, const WOLFSSL_ASN1_TIME* asnTime)
{
    char buf[MAX_TIME_STRING_SZ];
    int  ret = WOLFSSL_SUCCESS;

    WOLFSSL_ENTER("wolfSSL_ASN1_TIME_print");

    if (bio == NULL || asnTime == NULL) {
        WOLFSSL_MSG("NULL function argument");
        return WOLFSSL_FAILURE;
    }

    if (wolfSSL_ASN1_TIME_to_string((WOLFSSL_ASN1_TIME*)asnTime, buf,
                sizeof(buf)) == NULL) {
        XMEMSET(buf, 0, MAX_TIME_STRING_SZ);
        XSTRNCPY(buf, "Bad time value", sizeof(buf)-1);
        ret = WOLFSSL_FAILURE;
    }

    if (wolfSSL_BIO_write(bio, buf, (int)XSTRLEN(buf)) <= 0) {
        WOLFSSL_MSG("Unable to write to bio");
        return WOLFSSL_FAILURE;
    }

    return ret;
}
#endif /* !NO_BIO */

char* wolfSSL_ASN1_TIME_to_string(WOLFSSL_ASN1_TIME* t, char* buf, int len)
{
    WOLFSSL_ENTER("wolfSSL_ASN1_TIME_to_string");

    if (t == NULL || buf == NULL || len < 5) {
        WOLFSSL_MSG("Bad argument");
        return NULL;
    }

    if (t->length > len) {
        WOLFSSL_MSG("Length of date is longer then buffer");
        return NULL;
    }

    if (!GetTimeString(t->data, t->type, buf, len)) {
        return NULL;
    }

    return buf;
}
#endif /* !NO_ASN_TIME */
#endif /* WOLFSSL_MYSQL_COMPATIBLE || WOLFSSL_NGINX || WOLFSSL_HAPROXY ||
    OPENSSL_EXTRA*/


#ifdef OPENSSL_EXTRA

#ifndef NO_WOLFSSL_STUB
int wolfSSL_ASN1_INTEGER_cmp(const WOLFSSL_ASN1_INTEGER* a,
                            const WOLFSSL_ASN1_INTEGER* b)
{
    (void)a;
    (void)b;
    WOLFSSL_STUB("ASN1_INTEGER_cmp");
    return 0;
}
#endif

#ifndef NO_WOLFSSL_STUB
long wolfSSL_ASN1_INTEGER_get(const WOLFSSL_ASN1_INTEGER* i)
{
    (void)i;
    WOLFSSL_STUB("ASN1_INTEGER_get");
    return 0;
}
#endif

#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
/* Gets an index to store SSL structure at.
 *
 * Returns positive index on success and negative values on failure
 */
int wolfSSL_get_ex_data_X509_STORE_CTX_idx(void)
{
    WOLFSSL_ENTER("wolfSSL_get_ex_data_X509_STORE_CTX_idx");

    /* store SSL at index 0 */
    return 0;
}
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#ifdef OPENSSL_EXTRA
/* Sets a function callback that will send information about the state of all
 * WOLFSSL objects that have been created by the WOLFSSL_CTX structure passed
 * in.
 *
 * ctx WOLFSSL_CTX structure to set callback function in
 * f   callback function to use
 */
void wolfSSL_CTX_set_info_callback(WOLFSSL_CTX* ctx,
       void (*f)(const WOLFSSL* ssl, int type, int val))
{
    WOLFSSL_ENTER("wolfSSL_CTX_set_info_callback");
    if (ctx == NULL) {
        WOLFSSL_MSG("Bad function argument");
    }
    else {
        ctx->CBIS = f;
    }
}


unsigned long wolfSSL_ERR_peek_error(void)
{
    WOLFSSL_ENTER("wolfSSL_ERR_peek_error");

    return wolfSSL_ERR_peek_error_line_data(NULL, NULL, NULL, NULL);
}

int wolfSSL_ERR_GET_LIB(unsigned long err)
{
    unsigned long value;

    value = (err & 0xFFFFFFL);
    switch (value) {
    case PEM_R_NO_START_LINE:
    case PEM_R_PROBLEMS_GETTING_PASSWORD:
    case PEM_R_BAD_PASSWORD_READ:
    case PEM_R_BAD_DECRYPT:
        return ERR_LIB_PEM;
    case EVP_R_BAD_DECRYPT:
    case EVP_R_BN_DECODE_ERROR:
    case EVP_R_DECODE_ERROR:
    case EVP_R_PRIVATE_KEY_DECODE_ERROR:
        return ERR_LIB_EVP;
    default:
        return 0;
    }
}

/* This function is to find global error values that are the same through out
 * all library version. With wolfSSL having only one set of error codes the
 * return value is pretty straight forward. The only thing needed is all wolfSSL
 * error values are typically negative.
 *
 * Returns the error reason
 */
int wolfSSL_ERR_GET_REASON(unsigned long err)
{
    int ret = (int)err;

    WOLFSSL_ENTER("wolfSSL_ERR_GET_REASON");

#if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY)
    /* Nginx looks for this error to know to stop parsing certificates. */
    if (err == ((ERR_LIB_PEM << 24) | PEM_R_NO_START_LINE))
        return PEM_R_NO_START_LINE;
#endif

    /* check if error value is in range of wolfSSL errors */
    ret = 0 - ret; /* setting as negative value */
    /* wolfCrypt range is less than MAX (-100)
       wolfSSL range is MIN (-300) and lower */
    if (ret < MAX_CODE_E && ret > MIN_CODE_E) {
        return ret;
    }
    else {
        WOLFSSL_MSG("Not in range of typical error values");
        ret = (int)err;
    }

    return ret;
}


/* returns a string that describes the alert
 *
 * alertID the alert value to look up
 */
const char* wolfSSL_alert_type_string_long(int alertID)
{
    WOLFSSL_ENTER("wolfSSL_alert_type_string_long");

    switch (alertID) {
        case close_notify:
            {
                static const char close_notify_str[] =
                    "close_notify";
                return close_notify_str;
            }

        case unexpected_message:
            {
                static const char unexpected_message_str[] =
                    "unexpected_message";
                return unexpected_message_str;
            }

        case bad_record_mac:
            {
                static const char bad_record_mac_str[] =
                    "bad_record_mac";
                return bad_record_mac_str;
            }

        case record_overflow:
            {
                static const char record_overflow_str[] =
                    "record_overflow";
                return record_overflow_str;
            }

        case decompression_failure:
            {
                static const char decompression_failure_str[] =
                    "decompression_failure";
                return decompression_failure_str;
            }

        case handshake_failure:
            {
                static const char handshake_failure_str[] =
                    "handshake_failure";
                return handshake_failure_str;
            }

        case no_certificate:
            {
                static const char no_certificate_str[] =
                    "no_certificate";
                return no_certificate_str;
            }

        case bad_certificate:
            {
                static const char bad_certificate_str[] =
                    "bad_certificate";
                return bad_certificate_str;
            }

        case unsupported_certificate:
            {
                static const char unsupported_certificate_str[] =
                    "unsupported_certificate";
                return unsupported_certificate_str;
            }

        case certificate_revoked:
            {
                static const char certificate_revoked_str[] =
                    "certificate_revoked";
                return certificate_revoked_str;
            }

        case certificate_expired:
            {
                static const char certificate_expired_str[] =
                    "certificate_expired";
                return certificate_expired_str;
            }

        case certificate_unknown:
            {
                static const char certificate_unknown_str[] =
                    "certificate_unknown";
                return certificate_unknown_str;
            }

        case illegal_parameter:
            {
                static const char illegal_parameter_str[] =
                    "illegal_parameter";
                return illegal_parameter_str;
            }

        case unknown_ca:
            {
                static const char unknown_ca_str[] =
                    "unknown_ca";
                return unknown_ca_str;
            }

        case decode_error:
            {
                static const char decode_error_str[] =
                    "decode_error";
                return decode_error_str;
            }

        case decrypt_error:
            {
                static const char decrypt_error_str[] =
                    "decrypt_error";
                return decrypt_error_str;
            }

    #ifdef WOLFSSL_MYSQL_COMPATIBLE
    /* catch name conflict for enum protocol with MYSQL build */
        case wc_protocol_version:
            {
                static const char wc_protocol_version_str[] =
                    "wc_protocol_version";
                return wc_protocol_version_str;
            }

    #else
        case protocol_version:
            {
                static const char protocol_version_str[] =
                    "protocol_version";
                return protocol_version_str;
            }

    #endif
        case no_renegotiation:
            {
                static const char no_renegotiation_str[] =
                    "no_renegotiation";
                return no_renegotiation_str;
            }

        case unrecognized_name:
            {
                static const char unrecognized_name_str[] =
                    "unrecognized_name";
                return unrecognized_name_str;
            }

        case bad_certificate_status_response:
            {
                static const char bad_certificate_status_response_str[] =
                    "bad_certificate_status_response";
                return bad_certificate_status_response_str;
            }

        case no_application_protocol:
            {
                static const char no_application_protocol_str[] =
                    "no_application_protocol";
                return no_application_protocol_str;
            }

        default:
            WOLFSSL_MSG("Unknown Alert");
            return NULL;
    }
}


const char* wolfSSL_alert_desc_string_long(int alertID)
{
    WOLFSSL_ENTER("wolfSSL_alert_desc_string_long");
    return wolfSSL_alert_type_string_long(alertID);
}


/* Gets the current state of the WOLFSSL structure
 *
 * ssl WOLFSSL structure to get state of
 *
 * Returns a human readable string of the WOLFSSL structure state
 */
const char* wolfSSL_state_string_long(const WOLFSSL* ssl)
{

    static const char* OUTPUT_STR[14][6][3] = {
        {
            {"SSLv3 Initialization","SSLv3 Initialization","SSLv3 Initialization"},
            {"TLSv1 Initialization","TLSv2 Initialization","TLSv2 Initialization"},
            {"TLSv1_1 Initialization","TLSv1_1 Initialization","TLSv1_1 Initialization"},
            {"TLSv1_2 Initialization","TLSv1_2 Initialization","TLSv1_2 Initialization"},
            {"DTLSv1 Initialization","DTLSv1 Initialization","DTLSv1 Initialization"},
            {"DTLSv1_2 Initialization","DTLSv1_2 Initialization","DTLSv1_2 Initialization"},
        },
        {
            {"SSLv3 read Server Hello Verify Request",
             "SSLv3 write Server Hello Verify Request",
             "SSLv3 Server Hello Verify Request"},
            {"TLSv1 read Server Hello Verify Request",
             "TLSv1 write Server Hello Verify Request",
             "TLSv1 Server Hello Verify Request"},
            {"TLSv1_1 read Server Hello Verify Request",
            "TLSv1_1 write Server Hello Verify Request",
             "TLSv1_1 Server Hello Verify Request"},
            {"TLSv1_2 read Server Hello Verify Request",
            "TLSv1_2 write Server Hello Verify Request",
             "TLSv1_2 Server Hello Verify Request"},
            {"DTLSv1 read Server Hello Verify Request",
             "DTLSv1 write Server Hello Verify Request",
             "DTLSv1 Server Hello Verify Request"},
            {"DTLSv1_2 read Server Hello Verify Request",
             "DTLSv1_2 write Server Hello Verify Request",
             "DTLSv1_2 Server Hello Verify Request"},
        },
        {
            {"SSLv3 read Server Hello",
             "SSLv3 write Server Hello",
             "SSLv3 Server Hello"},
            {"TLSv1 read Server Hello",
             "TLSv1 write Server Hello",
             "TLSv1 Server Hello"},
            {"TLSv1_1 read Server Hello",
            "TLSv1_1 write Server Hello",
             "TLSv1_1 Server Hello"},
            {"TLSv1_2 read Server Hello",
            "TLSv1_2 write Server Hello",
             "TLSv1_2 Server Hello"},
            {"DTLSv1 read Server Hello",
            "DTLSv1 write Server Hello",
             "DTLSv1 Server Hello"},
            {"DTLSv1_2 read Server Hello"
             "DTLSv1_2 write Server Hello",
             "DTLSv1_2 Server Hello",
            },
        },
        {
            {"SSLv3 read Server Session Ticket",
             "SSLv3 write Server Session Ticket",
             "SSLv3 Server Session Ticket"},
            {"TLSv1 read Server Session Ticket",
             "TLSv1 write Server Session Ticket",
             "TLSv1 Server Session Ticket"},
            {"TLSv1_1 read Server Session Ticket",
             "TLSv1_1 write Server Session Ticket",
             "TLSv1_1 Server Session Ticket"},
            {"TLSv1_2 read Server Session Ticket",
             "TLSv1_2 write Server Session Ticket",
             "TLSv1_2 Server Session Ticket"},
            {"DTLSv1 read Server Session Ticket",
             "DTLSv1 write Server Session Ticket",
             "DTLSv1 Server Session Ticket"},
            {"DTLSv1_2 read Server Session Ticket",
             "DTLSv1_2 write Server Session Ticket",
             "DTLSv1_2 Server Session Ticket"},
        },
        {
            {"SSLv3 read Server Cert",
             "SSLv3 write Server Cert",
             "SSLv3 Server Cert"},
            {"TLSv1 read Server Cert",
             "TLSv1 write Server Cert",
             "TLSv1 Server Cert"},
            {"TLSv1_1 read Server Cert",
             "TLSv1_1 write Server Cert",
             "TLSv1_1 Server Cert"},
            {"TLSv1_2 read Server Cert",
             "TLSv1_2 write Server Cert",
             "TLSv1_2 Server Cert"},
            {"DTLSv1 read Server Cert",
             "DTLSv1 write Server Cert",
             "DTLSv1 Server Cert"},
            {"DTLSv1_2 read Server Cert",
             "DTLSv1_2 write Server Cert",
             "DTLSv1_2 Server Cert"},
        },
        {
            {"SSLv3 read Server Key Exchange",
             "SSLv3 write Server Key Exchange",
             "SSLv3 Server Key Exchange"},
            {"TLSv1 read Server Key Exchange",
             "TLSv1 write Server Key Exchange",
             "TLSv1 Server Key Exchange"},
            {"TLSv1_1 read Server Key Exchange",
             "TLSv1_1 write Server Key Exchange",
             "TLSv1_1 Server Key Exchange"},
            {"TLSv1_2 read Server Key Exchange",
             "TLSv1_2 write Server Key Exchange",
             "TLSv1_2 Server Key Exchange"},
            {"DTLSv1 read Server Key Exchange",
             "DTLSv1 write Server Key Exchange",
             "DTLSv1 Server Key Exchange"},
            {"DTLSv1_2 read Server Key Exchange",
             "DTLSv1_2 write Server Key Exchange",
             "DTLSv1_2 Server Key Exchange"},
        },
        {
            {"SSLv3 read Server Hello Done",
             "SSLv3 write Server Hello Done",
             "SSLv3 Server Hello Done"},
            {"TLSv1 read Server Hello Done",
             "TLSv1 write Server Hello Done",
             "TLSv1 Server Hello Done"},
            {"TLSv1_1 read Server Hello Done",
             "TLSv1_1 write Server Hello Done",
             "TLSv1_1 Server Hello Done"},
            {"TLSv1_2 read Server Hello Done",
             "TLSv1_2 write Server Hello Done",
             "TLSv1_2 Server Hello Done"},
            {"DTLSv1 read Server Hello Done",
             "DTLSv1 write Server Hello Done",
             "DTLSv1 Server Hello Done"},
            {"DTLSv1_2 read Server Hello Done",
             "DTLSv1_2 write Server Hello Done",
             "DTLSv1_2 Server Hello Done"},
        },
        {
            {"SSLv3 read Server Change CipherSpec",
             "SSLv3 write Server Change CipherSpec",
             "SSLv3 Server Change CipherSpec"},
            {"TLSv1 read Server Change CipherSpec",
             "TLSv1 write Server Change CipherSpec",
             "TLSv1 Server Change CipherSpec"},
            {"TLSv1_1 read Server Change CipherSpec",
             "TLSv1_1 write Server Change CipherSpec",
             "TLSv1_1 Server Change CipherSpec"},
            {"TLSv1_2 read Server Change CipherSpec",
             "TLSv1_2 write Server Change CipherSpec",
             "TLSv1_2 Server Change CipherSpec"},
            {"DTLSv1 read Server Change CipherSpec",
             "DTLSv1 write Server Change CipherSpec",
             "DTLSv1 Server Change CipherSpec"},
            {"DTLSv1_2 read Server Change CipherSpec",
             "DTLSv1_2 write Server Change CipherSpec",
             "DTLSv1_2 Server Change CipherSpec"},
        },
        {
            {"SSLv3 read Server Finished",
             "SSLv3 write Server Finished",
             "SSLv3 Server Finished"},
            {"TLSv1 read Server Finished",
             "TLSv1 write Server Finished",
             "TLSv1 Server Finished"},
            {"TLSv1_1 read Server Finished",
             "TLSv1_1 write Server Finished",
             "TLSv1_1 Server Finished"},
            {"TLSv1_2 read Server Finished",
             "TLSv1_2 write Server Finished",
             "TLSv1_2 Server Finished"},
            {"DTLSv1 read Server Finished",
             "DTLSv1 write Server Finished",
             "DTLSv1 Server Finished"},
            {"DTLSv1_2 read Server Finished",
             "DTLSv1_2 write Server Finished",
             "DTLSv1_2 Server Finished"},
        },
        {
            {"SSLv3 read Client Hello",
             "SSLv3 write Client Hello",
             "SSLv3 Client Hello"},
            {"TLSv1 read Client Hello",
             "TLSv1 write Client Hello",
             "TLSv1 Client Hello"},
            {"TLSv1_1 read Client Hello",
             "TLSv1_1 write Client Hello",
             "TLSv1_1 Client Hello"},
            {"TLSv1_2 read Client Hello",
             "TLSv1_2 write Client Hello",
             "TLSv1_2 Client Hello"},
            {"DTLSv1 read Client Hello",
             "DTLSv1 write Client Hello",
             "DTLSv1 Client Hello"},
            {"DTLSv1_2 read Client Hello",
             "DTLSv1_2 write Client Hello",
             "DTLSv1_2 Client Hello"},
        },
        {
            {"SSLv3 read Client Key Exchange",
             "SSLv3 write Client Key Exchange",
             "SSLv3 Client Key Exchange"},
            {"TLSv1 read Client Key Exchange",
             "TLSv1 write Client Key Exchange",
             "TLSv1 Client Key Exchange"},
            {"TLSv1_1 read Client Key Exchange",
             "TLSv1_1 write Client Key Exchange",
             "TLSv1_1 Client Key Exchange"},
            {"TLSv1_2 read Client Key Exchange",
             "TLSv1_2 write Client Key Exchange",
             "TLSv1_2 Client Key Exchange"},
            {"DTLSv1 read Client Key Exchange",
             "DTLSv1 write Client Key Exchange",
             "DTLSv1 Client Key Exchange"},
            {"DTLSv1_2 read Client Key Exchange",
             "DTLSv1_2 write Client Key Exchange",
             "DTLSv1_2 Client Key Exchange"},
        },
        {
            {"SSLv3 read Client Change CipherSpec",
             "SSLv3 write Client Change CipherSpec",
             "SSLv3 Client Change CipherSpec"},
            {"TLSv1 read Client Change CipherSpec",
             "TLSv1 write Client Change CipherSpec",
             "TLSv1 Client Change CipherSpec"},
            {"TLSv1_1 read Client Change CipherSpec",
             "TLSv1_1 write Client Change CipherSpec",
             "TLSv1_1 Client Change CipherSpec"},
            {"TLSv1_2 read Client Change CipherSpec",
             "TLSv1_2 write Client Change CipherSpec",
             "TLSv1_2 Client Change CipherSpec"},
            {"DTLSv1 read Client Change CipherSpec",
             "DTLSv1 write Client Change CipherSpec",
             "DTLSv1 Client Change CipherSpec"},
            {"DTLSv1_2 read Client Change CipherSpec",
             "DTLSv1_2 write Client Change CipherSpec",
             "DTLSv1_2 Client Change CipherSpec"},
        },
        {
            {"SSLv3 read Client Finished",
             "SSLv3 write Client Finished",
             "SSLv3 Client Finished"},
            {"TLSv1 read Client Finished",
             "TLSv1 write Client Finished",
             "TLSv1 Client Finished"},
            {"TLSv1_1 read Client Finished",
             "TLSv1_1 write Client Finished",
             "TLSv1_1 Client Finished"},
            {"TLSv1_2 read Client Finished",
             "TLSv1_2 write Client Finished",
             "TLSv1_2 Client Finished"},
            {"DTLSv1 read Client Finished",
             "DTLSv1 write Client Finished",
             "DTLSv1 Client Finished"},
            {"DTLSv1_2 read Client Finished",
             "DTLSv1_2 write Client Finished",
             "DTLSv1_2 Client Finished"},
        },
        {
            {"SSLv3 Handshake Done",
             "SSLv3 Handshake Done",
             "SSLv3 Handshake Done"},
            {"TLSv1 Handshake Done",
             "TLSv1 Handshake Done",
             "TLSv1 Handshake Done"},
            {"TLSv1_1 Handshake Done",
             "TLSv1_1 Handshake Done",
             "TLSv1_1 Handshake Done"},
            {"TLSv1_2 Handshake Done",
             "TLSv1_2 Handshake Done",
             "TLSv1_2 Handshake Done"},
            {"DTLSv1 Handshake Done",
             "DTLSv1 Handshake Done",
             "DTLSv1 Handshake Done"},
            {"DTLSv1_2 Handshake Done"
             "DTLSv1_2 Handshake Done"
             "DTLSv1_2 Handshake Done"}
        }
    };
    enum ProtocolVer {
        SSL_V3 = 0,
        TLS_V1,
        TLS_V1_1,
        TLS_V1_2,
        DTLS_V1,
        DTLS_V1_2,
        UNKNOWN = 100
    };

    enum IOMode {
        SS_READ = 0,
        SS_WRITE,
        SS_NEITHER
    };

    enum SslState {
        ss_null_state = 0,
        ss_server_helloverify,
        ss_server_hello,
        ss_sessionticket,
        ss_server_cert,
        ss_server_keyexchange,
        ss_server_hellodone,
        ss_server_changecipherspec,
        ss_server_finished,
        ss_client_hello,
        ss_client_keyexchange,
        ss_client_changecipherspec,
        ss_client_finished,
        ss_handshake_done
    };

    int protocol = 0;
    int cbmode = 0;
    int state = 0;

    WOLFSSL_ENTER("wolfSSL_state_string_long");
    if (ssl == NULL) {
        WOLFSSL_MSG("Null argument passed in");
        return NULL;
    }

    /* Get state of callback */
    if (ssl->cbmode == SSL_CB_MODE_WRITE){
        cbmode =  SS_WRITE;
    } else if (ssl->cbmode == SSL_CB_MODE_READ){
        cbmode =  SS_READ;
    } else {
        cbmode =  SS_NEITHER;
    }

    /* Get protocol version */
    switch (ssl->version.major){
        case SSLv3_MAJOR:
            switch (ssl->version.minor){
                case TLSv1_MINOR:
                    protocol = TLS_V1;
                    break;
                case TLSv1_1_MINOR:
                    protocol = TLS_V1_1;
                    break;
                case TLSv1_2_MINOR:
                    protocol = TLS_V1_2;
                    break;
                case SSLv3_MINOR:
                    protocol = SSL_V3;
                    break;
                default:
                    protocol = UNKNOWN;
            }
            break;
        case DTLS_MAJOR:
            switch (ssl->version.minor){
        case DTLS_MINOR:
            protocol = DTLS_V1;
            break;
        case DTLSv1_2_MINOR:
            protocol = DTLS_V1_2;
            break;
        default:
            protocol = UNKNOWN;
    }
    break;
    default:
        protocol = UNKNOWN;
    }

    /* accept process */
    if (ssl->cbmode == SSL_CB_MODE_READ){
        state = ssl->cbtype;
        switch (state) {
            case hello_verify_request:
                state = ss_server_helloverify;
                break;
            case session_ticket:
                state = ss_sessionticket;
                break;
            case server_hello:
                state = ss_server_hello;
                break;
            case server_hello_done:
                state = ss_server_hellodone;
                break;
            case certificate:
                state = ss_server_cert;
                break;
            case server_key_exchange:
                state = ss_server_keyexchange;
                break;
            case client_hello:
                state = ss_client_hello;
                break;
            case client_key_exchange:
                state = ss_client_keyexchange;
                break;
            case finished:
                if (ssl->options.side == WOLFSSL_SERVER_END)
                    state = ss_client_finished;
                else if (ssl->options.side == WOLFSSL_CLIENT_END)
                    state = ss_server_finished;
                else {
                    WOLFSSL_MSG("Unknown State");
                    state = ss_null_state;
                }
                break;
            default:
                WOLFSSL_MSG("Unknown State");
                state = ss_null_state;
        }
    } else {
        /* Send process */
        if (ssl->options.side == WOLFSSL_SERVER_END)
            state = ssl->options.serverState;
        else
            state = ssl->options.clientState;

        switch(state){
            case SERVER_HELLOVERIFYREQUEST_COMPLETE:
                state = ss_server_helloverify;
                break;
            case SERVER_HELLO_COMPLETE:
                state = ss_server_hello;
                break;
            case SERVER_CERT_COMPLETE:
                state = ss_server_cert;
                break;
            case SERVER_KEYEXCHANGE_COMPLETE:
                state = ss_server_keyexchange;
                break;
            case SERVER_HELLODONE_COMPLETE:
                state = ss_server_hellodone;
                break;
            case SERVER_CHANGECIPHERSPEC_COMPLETE:
                state = ss_server_changecipherspec;
                break;
            case SERVER_FINISHED_COMPLETE:
                state = ss_server_finished;
                break;
            case CLIENT_HELLO_COMPLETE:
                state = ss_client_hello;
                break;
            case CLIENT_KEYEXCHANGE_COMPLETE:
                state = ss_client_keyexchange;
                break;
            case CLIENT_CHANGECIPHERSPEC_COMPLETE:
                state = ss_client_changecipherspec;
                break;
            case CLIENT_FINISHED_COMPLETE:
                state = ss_client_finished;
                break;
            case HANDSHAKE_DONE:
                state = ss_handshake_done;
                break;
            default:
                WOLFSSL_MSG("Unknown State");
                state = ss_null_state;
        }
    }

    if (protocol == UNKNOWN)
        return NULL;
    else
        return OUTPUT_STR[state][protocol][cbmode];
}

/*
 * Sets default PEM callback password if null is passed into
 * the callback parameter of a PEM_read_bio_* function.
 *
 * Returns callback phrase size on success or WOLFSSL_FAILURE otherwise.
 */
int wolfSSL_PEM_def_callback(char* name, int num, int w, void* key)
{
    int sz;
    (void)w;
    WOLFSSL_ENTER("wolfSSL_PEM_def_callback");

    /* We assume that the user passes a default password as userdata */
    if (key) {
        sz = (int)XSTRLEN((const char*)key);
        sz = (sz > num) ? num : sz;
        XMEMCPY(name, key, sz);
        return sz;
    } else {
        WOLFSSL_MSG("Error, default password cannot be created.");
        return WOLFSSL_FAILURE;
    }
}

#endif /* OPENSSL_EXTRA */

static long wolf_set_options(long old_op, long op)
{
    /* if SSL_OP_ALL then turn all bug workarounds on */
    if ((op & SSL_OP_ALL) == SSL_OP_ALL) {
        WOLFSSL_MSG("\tSSL_OP_ALL");
    }

    /* by default cookie exchange is on with DTLS */
    if ((op & SSL_OP_COOKIE_EXCHANGE) == SSL_OP_COOKIE_EXCHANGE) {
        WOLFSSL_MSG("\tSSL_OP_COOKIE_EXCHANGE : on by default");
    }

    if ((op & WOLFSSL_OP_NO_SSLv2) == WOLFSSL_OP_NO_SSLv2) {
        WOLFSSL_MSG("\tWOLFSSL_OP_NO_SSLv2 : wolfSSL does not support SSLv2");
    }

#ifdef SSL_OP_NO_TLSv1_3
    if ((op & SSL_OP_NO_TLSv1_3) == SSL_OP_NO_TLSv1_3) {
        WOLFSSL_MSG("\tSSL_OP_NO_TLSv1_3");
    }
#endif

    if ((op & WOLFSSL_OP_NO_TLSv1_2) == WOLFSSL_OP_NO_TLSv1_2) {
        WOLFSSL_MSG("\tSSL_OP_NO_TLSv1_2");
    }

    if ((op & WOLFSSL_OP_NO_TLSv1_1) == WOLFSSL_OP_NO_TLSv1_1) {
        WOLFSSL_MSG("\tSSL_OP_NO_TLSv1_1");
    }

    if ((op & WOLFSSL_OP_NO_TLSv1) == WOLFSSL_OP_NO_TLSv1) {
        WOLFSSL_MSG("\tSSL_OP_NO_TLSv1");
    }

    if ((op & WOLFSSL_OP_NO_SSLv3) == WOLFSSL_OP_NO_SSLv3) {
        WOLFSSL_MSG("\tSSL_OP_NO_SSLv3");
    }

    if ((op & SSL_OP_CIPHER_SERVER_PREFERENCE) == SSL_OP_CIPHER_SERVER_PREFERENCE) {
        WOLFSSL_MSG("\tSSL_OP_CIPHER_SERVER_PREFERENCE");
    }

    if ((op & SSL_OP_NO_COMPRESSION) == SSL_OP_NO_COMPRESSION) {
    #ifdef HAVE_LIBZ
        WOLFSSL_MSG("SSL_OP_NO_COMPRESSION");
    #else
        WOLFSSL_MSG("SSL_OP_NO_COMPRESSION: compression not compiled in");
    #endif
    }

    return old_op | op;
}

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
long wolfSSL_set_options(WOLFSSL* ssl, long op)
{
    word16 haveRSA = 1;
    word16 havePSK = 0;
    int    keySz   = 0;

    WOLFSSL_ENTER("wolfSSL_set_options");

    if (ssl == NULL) {
        return 0;
    }

    ssl->options.mask = wolf_set_options(ssl->options.mask, op);

#ifdef SSL_OP_NO_TLSv1_3
    if ((ssl->options.mask & SSL_OP_NO_TLSv1_3) == SSL_OP_NO_TLSv1_3) {
        if (ssl->version.minor == TLSv1_3_MINOR)
            ssl->version.minor = TLSv1_2_MINOR;
    }
#endif

    if ((ssl->options.mask & SSL_OP_NO_TLSv1_2) == SSL_OP_NO_TLSv1_2) {
        if (ssl->version.minor == TLSv1_2_MINOR)
            ssl->version.minor = TLSv1_1_MINOR;
    }

    if ((ssl->options.mask & SSL_OP_NO_TLSv1_1) == SSL_OP_NO_TLSv1_1) {
        if (ssl->version.minor == TLSv1_1_MINOR)
            ssl->version.minor = TLSv1_MINOR;
    }

    if ((ssl->options.mask & SSL_OP_NO_TLSv1) == SSL_OP_NO_TLSv1) {
        if (ssl->version.minor == TLSv1_MINOR)
            ssl->version.minor = SSLv3_MINOR;
    }

    if ((ssl->options.mask & SSL_OP_NO_COMPRESSION) == SSL_OP_NO_COMPRESSION) {
    #ifdef HAVE_LIBZ
        ssl->options.usingCompression = 0;
    #endif
    }

    /* in the case of a version change the cipher suites should be reset */
#ifndef NO_PSK
    havePSK = ssl->options.havePSK;
#endif
#ifdef NO_RSA
    haveRSA = 0;
#endif
#ifndef NO_CERTS
    keySz = ssl->buffers.keySz;
#endif

    if (ssl->suites != NULL && ssl->options.side != WOLFSSL_NEITHER_END)
        InitSuites(ssl->suites, ssl->version, keySz, haveRSA, havePSK,
                       ssl->options.haveDH, ssl->options.haveNTRU,
                       ssl->options.haveECDSAsig, ssl->options.haveECC,
                       ssl->options.haveStaticECC, ssl->options.haveAnon,
                       ssl->options.side);

    return ssl->options.mask;
}


long wolfSSL_get_options(const WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_get_options");
    if(ssl == NULL)
        return WOLFSSL_FAILURE;
    return ssl->options.mask;
}

#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#if defined(HAVE_SECURE_RENEGOTIATION) \
        || defined(HAVE_SERVER_RENEGOTIATION_INFO)
/* clears the counter for number of renegotiations done
 * returns the current count before it is cleared */
long wolfSSL_clear_num_renegotiations(WOLFSSL *s)
{
    long total;

    WOLFSSL_ENTER("wolfSSL_clear_num_renegotiations");
    if (s == NULL)
        return 0;

    total = s->secure_rene_count;
    s->secure_rene_count = 0;
    return total;
}


/* return the number of renegotiations since wolfSSL_new */
long wolfSSL_total_renegotiations(WOLFSSL *s)
{
    WOLFSSL_ENTER("wolfSSL_total_renegotiations");
    return wolfSSL_num_renegotiations(s);
}


/* return the number of renegotiations since wolfSSL_new */
long wolfSSL_num_renegotiations(WOLFSSL* s)
{
    if (s == NULL) {
        return 0;
    }

    return s->secure_rene_count;
}


/* Is there a renegotiation currently in progress? */
int  wolfSSL_SSL_renegotiate_pending(WOLFSSL *s)
{
    return s && s->options.handShakeDone &&
            s->options.handShakeState != HANDSHAKE_DONE ? 1 : 0;
}
#endif /* HAVE_SECURE_RENEGOTIATION || HAVE_SERVER_RENEGOTIATION_INFO */

#ifdef OPENSSL_EXTRA

long wolfSSL_clear_options(WOLFSSL* ssl, long opt)
{
    WOLFSSL_ENTER("SSL_clear_options");
    if(ssl == NULL)
        return WOLFSSL_FAILURE;
    ssl->options.mask &= ~opt;
    return ssl->options.mask;
}


#ifndef NO_DH
long wolfSSL_set_tmp_dh(WOLFSSL *ssl, WOLFSSL_DH *dh)
{
    int pSz, gSz;
    byte *p, *g;
    int ret = 0;

    WOLFSSL_ENTER("wolfSSL_set_tmp_dh");

    if (!ssl || !dh)
        return BAD_FUNC_ARG;

    /* Get needed size for p and g */
    pSz = wolfSSL_BN_bn2bin(dh->p, NULL);
    gSz = wolfSSL_BN_bn2bin(dh->g, NULL);

    if (pSz <= 0 || gSz <= 0)
        return WOLFSSL_FATAL_ERROR;

    p = (byte*)XMALLOC(pSz, ssl->heap, DYNAMIC_TYPE_PUBLIC_KEY);
    if (!p)
        return MEMORY_E;

    g = (byte*)XMALLOC(gSz, ssl->heap, DYNAMIC_TYPE_PUBLIC_KEY);
    if (!g) {
        XFREE(p, ssl->heap, DYNAMIC_TYPE_PUBLIC_KEY);
        return MEMORY_E;
    }

    pSz = wolfSSL_BN_bn2bin(dh->p, p);
    gSz = wolfSSL_BN_bn2bin(dh->g, g);

    if (pSz >= 0 && gSz >= 0) /* Conversion successful */
        ret = wolfSSL_SetTmpDH(ssl, p, pSz, g, gSz);

    XFREE(p, ssl->heap, DYNAMIC_TYPE_PUBLIC_KEY);
    XFREE(g, ssl->heap, DYNAMIC_TYPE_PUBLIC_KEY);

    return pSz > 0 && gSz > 0 ? ret : WOLFSSL_FATAL_ERROR;
}
#endif /* !NO_DH */


#ifdef HAVE_PK_CALLBACKS
long wolfSSL_set_tlsext_debug_arg(WOLFSSL* ssl, void *arg)
{
    if (ssl == NULL) {
        return WOLFSSL_FAILURE;
    }

    ssl->loggingCtx = arg;
    return WOLFSSL_SUCCESS;
}
#endif /* HAVE_PK_CALLBACKS */

#if defined(OPENSSL_ALL) || defined(WOLFSSL_HAPROXY)
const unsigned char *SSL_SESSION_get0_id_context(const WOLFSSL_SESSION *sess, unsigned int *sid_ctx_length)
{
    const byte *c = wolfSSL_SESSION_get_id((WOLFSSL_SESSION *)sess, sid_ctx_length);
    return c;
}
#endif

/*** TBD ***/
#ifndef NO_WOLFSSL_STUB
WOLFSSL_API int wolfSSL_sk_SSL_COMP_zero(WOLFSSL_STACK* st)
{
    (void)st;
    WOLFSSL_STUB("wolfSSL_sk_SSL_COMP_zero");
    /* wolfSSL_set_options(ssl, SSL_OP_NO_COMPRESSION); */
    return WOLFSSL_FAILURE;
}
#endif

#ifdef HAVE_CERTIFICATE_STATUS_REQUEST
long wolfSSL_set_tlsext_status_type(WOLFSSL *s, int type)
{
    WOLFSSL_ENTER("wolfSSL_set_tlsext_status_type");

    if (s == NULL){
        return BAD_FUNC_ARG;
    }

    if (type == TLSEXT_STATUSTYPE_ocsp){
        int r = TLSX_UseCertificateStatusRequest(&s->extensions, (byte)type, 0, s,
                                                             s->heap, s->devId);
        return (long)r;
    } else {
        WOLFSSL_MSG(
       "SSL_set_tlsext_status_type only supports TLSEXT_STATUSTYPE_ocsp type.");
        return SSL_FAILURE;
    }

}
#endif /* HAVE_CERTIFICATE_STATUS_REQUEST */

#ifndef NO_WOLFSSL_STUB
WOLFSSL_API long wolfSSL_get_tlsext_status_exts(WOLFSSL *s, void *arg)
{
    (void)s;
    (void)arg;
    WOLFSSL_STUB("wolfSSL_get_tlsext_status_exts");
    return WOLFSSL_FAILURE;
}
#endif

/*** TBD ***/
#ifndef NO_WOLFSSL_STUB
WOLFSSL_API long wolfSSL_set_tlsext_status_exts(WOLFSSL *s, void *arg)
{
    (void)s;
    (void)arg;
    WOLFSSL_STUB("wolfSSL_set_tlsext_status_exts");
    return WOLFSSL_FAILURE;
}
#endif

/*** TBD ***/
#ifndef NO_WOLFSSL_STUB
WOLFSSL_API long wolfSSL_get_tlsext_status_ids(WOLFSSL *s, void *arg)
{
    (void)s;
    (void)arg;
    WOLFSSL_STUB("wolfSSL_get_tlsext_status_ids");
    return WOLFSSL_FAILURE;
}
#endif

/*** TBD ***/
#ifndef NO_WOLFSSL_STUB
WOLFSSL_API long wolfSSL_set_tlsext_status_ids(WOLFSSL *s, void *arg)
{
    (void)s;
    (void)arg;
    WOLFSSL_STUB("wolfSSL_set_tlsext_status_ids");
    return WOLFSSL_FAILURE;
}
#endif

/*** TBD ***/
#ifndef NO_WOLFSSL_STUB
WOLFSSL_API int SSL_SESSION_set1_id(WOLFSSL_SESSION *s, const unsigned char *sid, unsigned int sid_len)
{
    (void)s;
    (void)sid;
    (void)sid_len;
    WOLFSSL_STUB("SSL_SESSION_set1_id");
    return WOLFSSL_FAILURE;
}
#endif

#ifndef NO_WOLFSSL_STUB
/*** TBD ***/
WOLFSSL_API int SSL_SESSION_set1_id_context(WOLFSSL_SESSION *s, const unsigned char *sid_ctx, unsigned int sid_ctx_len)
{
    (void)s;
    (void)sid_ctx;
    (void)sid_ctx_len;
    WOLFSSL_STUB("SSL_SESSION_set1_id_context");
    return WOLFSSL_FAILURE;
}
#endif

#if defined(OPENSSL_ALL) || defined(WOLFSSL_APACHE_HTTPD) \
    || defined(WOLFSSL_HAPROXY) || defined(WOLFSSL_WPAS)
WOLFSSL_X509_ALGOR* wolfSSL_X509_ALGOR_new(void)
{
    WOLFSSL_X509_ALGOR* ret;
    ret = (WOLFSSL_X509_ALGOR*)XMALLOC(sizeof(WOLFSSL_X509_ALGOR), NULL,
                                       DYNAMIC_TYPE_OPENSSL);
    if (ret) {
        XMEMSET(ret, 0, sizeof(WOLFSSL_X509_ALGOR));
    }
    return ret;
}

void wolfSSL_X509_ALGOR_free(WOLFSSL_X509_ALGOR *alg)
{
    if (alg) {
        wolfSSL_ASN1_OBJECT_free(alg->algorithm);
        wolfSSL_ASN1_TYPE_free(alg->parameter);
        XFREE(alg, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}

/* Returns X509_ALGOR struct with signature algorithm */
const WOLFSSL_X509_ALGOR* wolfSSL_X509_get0_tbs_sigalg(const WOLFSSL_X509 *x509)
{
    WOLFSSL_ENTER("X509_get0_tbs_sigalg");

    if (x509 == NULL) {
        WOLFSSL_MSG("x509 struct NULL error");
        return NULL;
    }

    return &x509->algor;
}

/* Sets paobj pointer to X509_ALGOR signature algorithm */
void wolfSSL_X509_ALGOR_get0(const WOLFSSL_ASN1_OBJECT **paobj, int *pptype,
                            const void **ppval, const WOLFSSL_X509_ALGOR *algor)
{
    WOLFSSL_ENTER("X509_ALGOR_get0");

    if (!algor) {
        WOLFSSL_MSG("algor object is NULL");
        return;
    }

    if (paobj)
        *paobj = algor->algorithm;
    if (ppval)
        *ppval = algor->algorithm;
    if (pptype) {
        if (algor->parameter) {
            *pptype = algor->parameter->type;
        }
        else {
            /* Default to V_ASN1_OBJECT */
            *pptype = V_ASN1_OBJECT;
        }
    }
}

/**
 * Populate algor members.
 *
 * @param algor The object to be set
 * @param aobj The value to be set in algor->algorithm
 * @param ptype The type of algor->parameter
 * @param pval The value of algor->parameter
 * @return WOLFSSL_SUCCESS on success
 *         WOLFSSL_FAILURE on missing parameters or bad malloc
 */
int wolfSSL_X509_ALGOR_set0(WOLFSSL_X509_ALGOR *algor, WOLFSSL_ASN1_OBJECT *aobj,
                            int ptype, void *pval)
{
    if (!algor) {
        return WOLFSSL_FAILURE;
    }
    if (aobj) {
        algor->algorithm = aobj;
    }
    if (pval) {
        if (!algor->parameter) {
            algor->parameter = wolfSSL_ASN1_TYPE_new();
            if (!algor->parameter) {
                return WOLFSSL_FAILURE;
            }
        }
        wolfSSL_ASN1_TYPE_set(algor->parameter, ptype, pval);
    }
    return WOLFSSL_SUCCESS;
}

/**
 * Set `a` in a smart way.
 *
 * @param a Object to set
 * @param type The type of object in value
 * @param value Object to set
 */
void wolfSSL_ASN1_TYPE_set(WOLFSSL_ASN1_TYPE *a, int type, void *value)
{
    if (!a || !value) {
        return;
    }
    switch (type) {
        case V_ASN1_OBJECT:
            a->value.object = (WOLFSSL_ASN1_OBJECT*)value;
            break;
        case V_ASN1_UTCTIME:
            a->value.utctime = (WOLFSSL_ASN1_TIME*)value;
            break;
        case V_ASN1_GENERALIZEDTIME:
            a->value.generalizedtime = (WOLFSSL_ASN1_TIME*)value;
            break;
        default:
            WOLFSSL_MSG("Unknown or unsupported ASN1_TYPE");
            return;
    }
    a->type = type;
}

/**
 * Allocate a new WOLFSSL_ASN1_TYPE object.
 *
 * @return New zero'ed WOLFSSL_ASN1_TYPE object
 */
WOLFSSL_ASN1_TYPE* wolfSSL_ASN1_TYPE_new(void)
{
    WOLFSSL_ASN1_TYPE* ret = (WOLFSSL_ASN1_TYPE*)XMALLOC(sizeof(WOLFSSL_ASN1_TYPE),
                                                        NULL, DYNAMIC_TYPE_OPENSSL);
    if (!ret)
        return NULL;
    XMEMSET(ret, 0, sizeof(WOLFSSL_ASN1_TYPE));
    return ret;
}

/**
 * Free WOLFSSL_ASN1_TYPE and all its members.
 *
 * @param at Object to free
 */
void wolfSSL_ASN1_TYPE_free(WOLFSSL_ASN1_TYPE* at)
{
    if (at) {
        switch (at->type) {
            case V_ASN1_OBJECT:
                wolfSSL_ASN1_OBJECT_free(at->value.object);
                break;
            case V_ASN1_UTCTIME:
            #ifndef NO_ASN_TIME
                wolfSSL_ASN1_TIME_free(at->value.utctime);
            #endif
                break;
            case V_ASN1_GENERALIZEDTIME:
            #ifndef NO_ASN_TIME
                wolfSSL_ASN1_TIME_free(at->value.generalizedtime);
            #endif
                break;
            case V_ASN1_UTF8STRING:
            case V_ASN1_PRINTABLESTRING:
            case V_ASN1_T61STRING:
            case V_ASN1_IA5STRING:
            case V_ASN1_UNIVERSALSTRING:
                wolfSSL_ASN1_STRING_free(at->value.asn1_string);
                break;
            default:
                WOLFSSL_MSG("Unknown or unsupported ASN1_TYPE");
                break;
        }
        XFREE(at, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}

/**
 * Allocate a new WOLFSSL_X509_PUBKEY object.
 *
 * @return New zero'ed WOLFSSL_X509_PUBKEY object
 */
WOLFSSL_X509_PUBKEY *wolfSSL_X509_PUBKEY_new(void)
{
    WOLFSSL_X509_PUBKEY *ret;
    ret = (WOLFSSL_X509_PUBKEY*)XMALLOC(sizeof(WOLFSSL_X509_PUBKEY), NULL,
                                        DYNAMIC_TYPE_OPENSSL);
    if (!ret) {
        return NULL;
    }
    XMEMSET(ret, 0, sizeof(WOLFSSL_X509_PUBKEY));
    ret->algor = wolfSSL_X509_ALGOR_new();
    if (!ret->algor) {
        wolfSSL_X509_PUBKEY_free(ret);
        return NULL;
    }
    return ret;
}

/**
 * Free WOLFSSL_X509_PUBKEY and all its members.
 *
 * @param at Object to free
 */
void wolfSSL_X509_PUBKEY_free(WOLFSSL_X509_PUBKEY *x)
{
    if (x) {
        if (x->algor) {
            wolfSSL_X509_ALGOR_free(x->algor);
        }
        if (x->pkey) {
            wolfSSL_EVP_PKEY_free(x->pkey);
        }
        XFREE(x, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}

/* Returns X509_PUBKEY structure containing X509_ALGOR and EVP_PKEY */
WOLFSSL_X509_PUBKEY* wolfSSL_X509_get_X509_PUBKEY(const WOLFSSL_X509* x509)
{
    WOLFSSL_ENTER("X509_get_X509_PUBKEY");

    if (x509 == NULL) {
        WOLFSSL_MSG("x509 struct NULL error");
        return NULL;
    }

    return (WOLFSSL_X509_PUBKEY*)&x509->key;
}

/* Sets ppkalg pointer to X509_PUBKEY algorithm. Returns WOLFSSL_SUCCESS on
    success or WOLFSSL_FAILURE on error. */
int wolfSSL_X509_PUBKEY_get0_param(WOLFSSL_ASN1_OBJECT **ppkalg,
     const unsigned char **pk, int *ppklen, WOLFSSL_X509_ALGOR **pa,
     WOLFSSL_X509_PUBKEY *pub)
{
    WOLFSSL_ENTER("X509_PUBKEY_get0_param");

    if (!pub || !pub->pubKeyOID) {
        WOLFSSL_MSG("X509_PUBKEY struct not populated");
        return WOLFSSL_FAILURE;
    }

    if (!pub->algor) {
        if (!(pub->algor = wolfSSL_X509_ALGOR_new())) {
            return WOLFSSL_FAILURE;
        }
        pub->algor->algorithm = wolfSSL_OBJ_nid2obj(pub->pubKeyOID);
        if (pub->algor->algorithm == NULL) {
            WOLFSSL_MSG("Failed to create object from NID");
            return WOLFSSL_FAILURE;
        }
    }

    if (pa)
        *pa = pub->algor;
    if (ppkalg)
        *ppkalg = pub->algor->algorithm;
    if (pk)
        *pk = (unsigned char*)pub->pkey->pkey.ptr;
    if (ppklen)
        *ppklen = pub->pkey->pkey_sz;

    return WOLFSSL_SUCCESS;
}

/* Returns a pointer to the pkey when passed a key */
WOLFSSL_EVP_PKEY* wolfSSL_X509_PUBKEY_get(WOLFSSL_X509_PUBKEY* key)
{
    WOLFSSL_ENTER("wolfSSL_X509_PUBKEY_get");
    if (key == NULL || key->pkey == NULL) {
        WOLFSSL_LEAVE("wolfSSL_X509_PUBKEY_get", BAD_FUNC_ARG);
        return NULL;
    }
    if (wolfSSL_EVP_PKEY_up_ref(key->pkey) != WOLFSSL_SUCCESS) {
        WOLFSSL_LEAVE("wolfSSL_X509_PUBKEY_get", BAD_MUTEX_E);
        return NULL;
    }
    WOLFSSL_LEAVE("wolfSSL_X509_PUBKEY_get", WOLFSSL_SUCCESS);
    return key->pkey;
}

int wolfSSL_X509_PUBKEY_set(WOLFSSL_X509_PUBKEY **x, WOLFSSL_EVP_PKEY *key)
{
    WOLFSSL_X509_PUBKEY *pk = NULL;

    WOLFSSL_ENTER("wolfSSL_X509_PUBKEY_set");

    if (!x || !key) {
        return WOLFSSL_FAILURE;
    }

    if (!(pk = wolfSSL_X509_PUBKEY_new())) {
        return WOLFSSL_FAILURE;
    }

    switch (key->type) {
#ifndef NO_RSA
    case EVP_PKEY_RSA:
        pk->algor->algorithm= wolfSSL_OBJ_nid2obj(RSAk);
        break;
#endif
#ifndef NO_DSA
    case EVP_PKEY_DSA:
        pk->algor->algorithm = wolfSSL_OBJ_nid2obj(DSAk);
        break;
#endif
#ifdef HAVE_ECC
    case EVP_PKEY_EC:
        pk->algor->algorithm = wolfSSL_OBJ_nid2obj(ECDSAk);
        break;
#endif
    default:
        WOLFSSL_MSG("Unknown key type");
        goto error;
    }

    if (!pk->algor->algorithm) {
        WOLFSSL_MSG("Failed to create algorithm object");
        goto error;
    }

    if (!wolfSSL_EVP_PKEY_up_ref(key)) {
        WOLFSSL_MSG("Failed to up key reference");
        goto error;
    }
    pk->pkey = key;

    wolfSSL_X509_PUBKEY_free(*x);
    *x = pk;
    return WOLFSSL_SUCCESS;
error:
    if (pk) {
        wolfSSL_X509_PUBKEY_free(pk);
    }
    return WOLFSSL_FAILURE;
}

#endif /* OPENSSL_ALL || WOLFSSL_APACHE_HTTPD || WOLFSSL_HAPROXY*/

#ifndef NO_WOLFSSL_STUB
/*** TBD ***/
WOLFSSL_API WOLFSSL_EVP_PKEY *wolfSSL_get_privatekey(const WOLFSSL *ssl)
{
    (void)ssl;
    WOLFSSL_STUB("SSL_get_privatekey");
    return NULL;
}
#endif

#ifndef NO_WOLFSSL_STUB
/*** TBD ***/
WOLFSSL_API int i2t_ASN1_OBJECT(char *buf, int buf_len, WOLFSSL_ASN1_OBJECT *a)
{
    (void)buf;
    (void)buf_len;
    (void)a;
    WOLFSSL_STUB("i2t_ASN1_OBJECT");
    return -1;
}
#endif

WOLFSSL_ASN1_OBJECT *wolfSSL_d2i_ASN1_OBJECT(WOLFSSL_ASN1_OBJECT **a,
                                             const unsigned char **der,
                                             long length)
{
    const unsigned char *d;
    long len;
    int tag, cls;
    WOLFSSL_ASN1_OBJECT* ret = NULL;

    WOLFSSL_ENTER("wolfSSL_d2i_ASN1_OBJECT");

    if (!der || !*der || length <= 0) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    d = *der;

    if (wolfSSL_ASN1_get_object(&d, &len, &tag, &cls, length) & 0x80) {
        WOLFSSL_MSG("wolfSSL_ASN1_get_object error");
        return NULL;
    }
    /* d now points to value */

    if (tag != ASN_OBJECT_ID) {
        WOLFSSL_MSG("Not an ASN object");
        return NULL;
    }

    ret = wolfSSL_c2i_ASN1_OBJECT(a, &d, len);
    if (ret)
        *der = d;
    return ret;
}

/**
 * Parse an ASN1 encoded input and output information about the parsed object
 * @param in    ASN1 encoded data. *in is moved to the value of the ASN1 object
 * @param len   Length of parsed ASN1 object
 * @param tag   Tag value of parsed ASN1 object
 * @param cls   Class of parsed ASN1 object
 * @param inLen Length of *in buffer
 * @return int  Depends on which bits are set in the returned int:
 *              0x80 an error occurred during parsing
 *              0x20 parsed object is constructed
 *              0x01 the parsed object length is infinite
 */
int wolfSSL_ASN1_get_object(const unsigned char **in, long *len, int *tag,
                            int *cls, long inLen)
{
    word32 inOutIdx = 0;
    int l;
    byte t;
    int ret = 0x80;

    WOLFSSL_ENTER("wolfSSL_ASN1_get_object");

    if (!in || !*in || !len || !tag || !cls || inLen == 0) {
        WOLFSSL_MSG("Bad parameter");
        return ret;
    }

    if (GetASNTag(*in, &inOutIdx, &t, (word32)inLen) != 0) {
        WOLFSSL_MSG("GetASNTag error");
        return ret;
    }

    if (GetLength(*in, &inOutIdx, &l, (word32)inLen) < 0) {
        WOLFSSL_MSG("GetLength error");
        return ret;
    }

    *tag = t & 0x1F; /* Tag number is 5 lsb */
    *cls = t & 0xC0; /* Class is 2 msb */
    *len = l;
    ret = t & ASN_CONSTRUCTED;

    if (l > (int)(inLen - inOutIdx)) {
        /* Still return other values but indicate error in msb */
        ret |= 0x80;
    }

    *in += inOutIdx;
    return ret;
}

WOLFSSL_ASN1_OBJECT *wolfSSL_c2i_ASN1_OBJECT(WOLFSSL_ASN1_OBJECT **a,
        const unsigned char **pp, long len)
{
    WOLFSSL_ASN1_OBJECT* ret = NULL;

    WOLFSSL_ENTER("wolfSSL_c2i_ASN1_OBJECT");

    if (!pp || !*pp || len <= 0) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    if (!(ret = wolfSSL_ASN1_OBJECT_new())) {
        WOLFSSL_MSG("wolfSSL_ASN1_OBJECT_new error");
        return NULL;
    }

    ret->obj = (const unsigned char*)XMALLOC(len, NULL, DYNAMIC_TYPE_ASN1);
    if (!ret->obj) {
        WOLFSSL_MSG("error allocating asn data memory");
        wolfSSL_ASN1_OBJECT_free(ret);
        return NULL;
    }

    XMEMCPY((byte*)ret->obj, *pp, len);
    ret->objSz = (unsigned int)len;
    ret->dynamic |= WOLFSSL_ASN1_DYNAMIC_DATA;

    *pp += len;

    if (a)
        *a = ret;
    return ret;
}

#ifndef NO_BIO
/* Return number of bytes written to BIO on success. 0 on failure. */
WOLFSSL_API int wolfSSL_i2a_ASN1_OBJECT(WOLFSSL_BIO *bp,
                                        WOLFSSL_ASN1_OBJECT *a)
{
    int length = 0;
    word32 idx = 0;
    const char null_str[] = "NULL";

    WOLFSSL_ENTER("wolfSSL_i2a_ASN1_OBJECT");

    if (bp == NULL)
        return WOLFSSL_FAILURE;

    if (a == NULL) {
        /* Write "NULL" */
        if (wolfSSL_BIO_write(bp, null_str, (int)XSTRLEN(null_str)) ==
                (int)XSTRLEN(null_str)) {
            return (int)XSTRLEN(null_str);
        }
        else {
            return WOLFSSL_FAILURE;
        }
    }


    if ((a->obj == NULL) || (a->obj[idx++] != ASN_OBJECT_ID)) {
        WOLFSSL_MSG("Bad ASN1 Object");
        return WOLFSSL_FAILURE;
    }

    if (GetLength((const byte*)a->obj, &idx, &length,
                   a->objSz) < 0 || length < 0) {
        return WOLFSSL_FAILURE;
    }

    if (wolfSSL_BIO_write(bp, a->obj + idx, length) == (int)length) {
        return length;
    }

    return WOLFSSL_FAILURE;
}
#endif /* !NO_BIO */

/* Returns object data for an ASN1_OBJECT */
/* If pp is NULL then only the size is returned */
/* If pp has pointer to pointer then its used directly */
/* If pp has pointer to pointer that is NULL then new variable is allocated */
/* Failure returns WOLFSSL_FAILURE (0) */
int wolfSSL_i2d_ASN1_OBJECT(WOLFSSL_ASN1_OBJECT *a, unsigned char **pp)
{
    byte *p;

    WOLFSSL_ENTER("wolfSSL_i2d_ASN1_OBJECT");

    if (!a || !a->obj) {
        WOLFSSL_MSG("Bad parameters");
        return WOLFSSL_FAILURE;
    }

    if (!pp)
        return a->objSz;

    if (*pp)
        p = *pp;
    else {
        p = (byte*)XMALLOC(a->objSz, NULL, DYNAMIC_TYPE_OPENSSL);
        if (!p) {
            WOLFSSL_MSG("Bad malloc");
            return WOLFSSL_FAILURE;
        }
    }

    XMEMCPY(p, a->obj, a->objSz);
    *pp = p + a->objSz;
    return a->objSz;
}

#if defined(OPENSSL_ALL) || defined(WOLFSSL_HAPROXY)
WOLFSSL_API size_t wolfSSL_get_finished(const WOLFSSL *ssl, void *buf, size_t count)
{
    WOLFSSL_ENTER("SSL_get_finished");

    if (!ssl || !buf || count < TLS_FINISHED_SZ) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    if (ssl->options.side == WOLFSSL_SERVER_END)
        XMEMCPY(buf, ssl->serverFinished,
                TLS_FINISHED_SZ);
    else
        XMEMCPY(buf, ssl->clientFinished,
                TLS_FINISHED_SZ);
    return TLS_FINISHED_SZ;
}

WOLFSSL_API size_t wolfSSL_get_peer_finished(const WOLFSSL *ssl, void *buf, size_t count)
{
    WOLFSSL_ENTER("SSL_get_peer_finished");

    if (!ssl || !buf || count < TLS_FINISHED_SZ) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    if (ssl->options.side == WOLFSSL_CLIENT_END)
        XMEMCPY(buf, ssl->serverFinished,
                TLS_FINISHED_SZ);
    else
        XMEMCPY(buf, ssl->clientFinished,
                TLS_FINISHED_SZ);
    return TLS_FINISHED_SZ;
}
#endif /* WOLFSSL_HAPROXY */

#ifndef NO_WOLFSSL_STUB
/*** TBD ***/
WOLFSSL_API void SSL_CTX_set_tmp_dh_callback(WOLFSSL_CTX *ctx, WOLFSSL_DH *(*dh) (WOLFSSL *ssl, int is_export, int keylength))
{
    (void)ctx;
    (void)dh;
    WOLFSSL_STUB("SSL_CTX_set_tmp_dh_callback");
}
#endif

#ifndef NO_WOLFSSL_STUB
/*** TBD ***/
WOLFSSL_API WOLF_STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
{
    WOLFSSL_STUB("SSL_COMP_get_compression_methods");
    return NULL;
}
#endif


int wolfSSL_sk_SSL_CIPHER_num(const WOLF_STACK_OF(WOLFSSL_CIPHER)* p)
{
    WOLFSSL_ENTER("wolfSSL_sk_SSL_CIPHER_num");
    if (p == NULL) {
        return WOLFSSL_FATAL_ERROR;
    }
    return (int)p->num;
}

#if !defined(NO_FILESYSTEM)
#ifndef NO_WOLFSSL_STUB
/*** TBD ***/
WOLFSSL_API WOLFSSL_EVP_PKEY *wolfSSL_PEM_read_PrivateKey(XFILE fp, WOLFSSL_EVP_PKEY **x, pem_password_cb *cb, void *u)
{
    (void)fp;
    (void)x;
    (void)cb;
    (void)u;
    WOLFSSL_STUB("PEM_read_PrivateKey");
    return NULL;
}
#endif
#endif

WOLFSSL_API WOLFSSL_CIPHER* wolfSSL_sk_SSL_CIPHER_value(WOLFSSL_STACK* sk, int i)
{
    WOLFSSL_ENTER("wolfSSL_sk_SSL_CIPHER_value");
    return (WOLFSSL_CIPHER*)wolfSSL_sk_value(sk, i);
}

WOLFSSL_API void ERR_load_SSL_strings(void)
{

}

#ifdef HAVE_OCSP
WOLFSSL_API long wolfSSL_get_tlsext_status_ocsp_resp(WOLFSSL *s, unsigned char **resp)
{
    if (s == NULL || resp == NULL)
        return 0;

    *resp = s->ocspResp;
    return s->ocspRespSz;
}

WOLFSSL_API long wolfSSL_set_tlsext_status_ocsp_resp(WOLFSSL *s, unsigned char *resp, int len)
{
    if (s == NULL)
        return WOLFSSL_FAILURE;

    s->ocspResp   = resp;
    s->ocspRespSz = len;

    return WOLFSSL_SUCCESS;
}
#endif /* HAVE_OCSP */

#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
long wolfSSL_get_verify_result(const WOLFSSL *ssl)
{
    if (ssl == NULL) {
        return WOLFSSL_FAILURE;
    }

    return ssl->peerVerifyRet;
}
#endif

#ifdef OPENSSL_EXTRA

#ifndef NO_WOLFSSL_STUB
/* shows the number of accepts attempted by CTX in it's lifetime */
long wolfSSL_CTX_sess_accept(WOLFSSL_CTX* ctx)
{
    WOLFSSL_STUB("wolfSSL_CTX_sess_accept");
    (void)ctx;
    return 0;
}
#endif

#ifndef NO_WOLFSSL_STUB
/* shows the number of connects attempted CTX in it's lifetime */
long wolfSSL_CTX_sess_connect(WOLFSSL_CTX* ctx)
{
    WOLFSSL_STUB("wolfSSL_CTX_sess_connect");
    (void)ctx;
    return 0;
}
#endif


#ifndef NO_WOLFSSL_STUB
/* shows the number of accepts completed by CTX in it's lifetime */
long wolfSSL_CTX_sess_accept_good(WOLFSSL_CTX* ctx)
{
    WOLFSSL_STUB("wolfSSL_CTX_sess_accept_good");
    (void)ctx;
    return 0;
}
#endif


#ifndef NO_WOLFSSL_STUB
/* shows the number of connects completed by CTX in it's lifetime */
long wolfSSL_CTX_sess_connect_good(WOLFSSL_CTX* ctx)
{
    WOLFSSL_STUB("wolfSSL_CTX_sess_connect_good");
    (void)ctx;
    return 0;
}
#endif


#ifndef NO_WOLFSSL_STUB
/* shows the number of renegotiation accepts attempted by CTX */
long wolfSSL_CTX_sess_accept_renegotiate(WOLFSSL_CTX* ctx)
{
    WOLFSSL_STUB("wolfSSL_CTX_sess_accept_renegotiate");
    (void)ctx;
    return 0;
}
#endif


#ifndef NO_WOLFSSL_STUB
/* shows the number of renegotiation accepts attempted by CTX */
long wolfSSL_CTX_sess_connect_renegotiate(WOLFSSL_CTX* ctx)
{
    WOLFSSL_STUB("wolfSSL_CTX_sess_connect_renegotiate");
    (void)ctx;
    return 0;
}
#endif


#ifndef NO_WOLFSSL_STUB
long wolfSSL_CTX_sess_hits(WOLFSSL_CTX* ctx)
{
    WOLFSSL_STUB("wolfSSL_CTX_sess_hits");
    (void)ctx;
    return 0;
}
#endif


#ifndef NO_WOLFSSL_STUB
long wolfSSL_CTX_sess_cb_hits(WOLFSSL_CTX* ctx)
{
    WOLFSSL_STUB("wolfSSL_CTX_sess_cb_hits");
    (void)ctx;
    return 0;
}
#endif


#ifndef NO_WOLFSSL_STUB
long wolfSSL_CTX_sess_cache_full(WOLFSSL_CTX* ctx)
{
    WOLFSSL_STUB("wolfSSL_CTX_sess_cache_full");
    (void)ctx;
    return 0;
}
#endif


#ifndef NO_WOLFSSL_STUB
long wolfSSL_CTX_sess_misses(WOLFSSL_CTX* ctx)
{
    WOLFSSL_STUB("wolfSSL_CTX_sess_misses");
    (void)ctx;
    return 0;
}
#endif


#ifndef NO_WOLFSSL_STUB
long wolfSSL_CTX_sess_timeouts(WOLFSSL_CTX* ctx)
{
    WOLFSSL_STUB("wolfSSL_CTX_sess_timeouts");
    (void)ctx;
    return 0;
}
#endif


/* Return the total number of sessions */
long wolfSSL_CTX_sess_number(WOLFSSL_CTX* ctx)
{
    word32 total = 0;

    WOLFSSL_ENTER("wolfSSL_CTX_sess_number");
    (void)ctx;

#ifdef WOLFSSL_SESSION_STATS
    if (wolfSSL_get_session_stats(NULL, &total, NULL, NULL) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("Error getting session stats");
    }
#else
    WOLFSSL_MSG("Please use macro WOLFSSL_SESSION_STATS for session stats");
#endif

    return (long)total;
}


#ifndef NO_CERTS
long wolfSSL_CTX_add_extra_chain_cert(WOLFSSL_CTX* ctx, WOLFSSL_X509* x509)
{
    byte* chain = NULL;
    long  chainSz = 0;
    int   derSz;
    const byte* der;
    int   ret;
    int   idx = 0;
    DerBuffer *derBuffer = NULL;

    WOLFSSL_ENTER("wolfSSL_CTX_add_extra_chain_cert");

    if (ctx == NULL || x509 == NULL) {
        WOLFSSL_MSG("Bad Argument");
        return WOLFSSL_FAILURE;
    }

    der = wolfSSL_X509_get_der(x509, &derSz);
    if (der == NULL || derSz <= 0) {
        WOLFSSL_MSG("Error getting X509 DER");
        return WOLFSSL_FAILURE;
    }

    if (ctx->certificate == NULL) {
        WOLFSSL_ENTER("wolfSSL_use_certificate_chain_buffer_format");

        /* Process buffer makes first certificate the leaf. */
        ret = ProcessBuffer(ctx, der, derSz, WOLFSSL_FILETYPE_ASN1, CERT_TYPE,
                            NULL, NULL, 1, GET_VERIFY_SETTING_CTX(ctx));
        if (ret != WOLFSSL_SUCCESS) {
            WOLFSSL_LEAVE("wolfSSL_CTX_add_extra_chain_cert", ret);
            return WOLFSSL_FAILURE;
        }
    }
    else {
        /* TODO: Do this elsewhere. */
        ret = AllocDer(&derBuffer, derSz, CERT_TYPE, ctx->heap);
        if (ret != 0) {
            WOLFSSL_MSG("Memory Error");
            return WOLFSSL_FAILURE;
        }
        XMEMCPY(derBuffer->buffer, der, derSz);
        ret = AddCA(ctx->cm, &derBuffer, WOLFSSL_USER_CA,
            GET_VERIFY_SETTING_CTX(ctx));
        if (ret != WOLFSSL_SUCCESS) {
            WOLFSSL_LEAVE("wolfSSL_CTX_add_extra_chain_cert", ret);
            return WOLFSSL_FAILURE;
        }

        /* adding cert to existing chain */
        if (ctx->certChain != NULL && ctx->certChain->length > 0) {
            chainSz += ctx->certChain->length;
        }
        chainSz += OPAQUE24_LEN + derSz;

        chain = (byte*)XMALLOC(chainSz, ctx->heap, DYNAMIC_TYPE_DER);
        if (chain == NULL) {
            WOLFSSL_MSG("Memory Error");
            return WOLFSSL_FAILURE;
        }

        if (ctx->certChain != NULL && ctx->certChain->length > 0) {
            XMEMCPY(chain, ctx->certChain->buffer, ctx->certChain->length);
            idx = ctx->certChain->length;
        }
        c32to24(derSz, chain + idx);
        idx += OPAQUE24_LEN;
        XMEMCPY(chain + idx, der, derSz);
        idx += derSz;
#ifdef WOLFSSL_TLS13
        ctx->certChainCnt++;
#endif

        FreeDer(&ctx->certChain);
        ret = AllocDer(&ctx->certChain, idx, CERT_TYPE, ctx->heap);
        if (ret == 0) {
            XMEMCPY(ctx->certChain->buffer, chain, idx);
        }
    }

    /* on success WOLFSSL_X509 memory is responsibility of ctx */
    wolfSSL_X509_free(x509);
    if (chain != NULL)
        XFREE(chain, ctx->heap, DYNAMIC_TYPE_DER);

    return WOLFSSL_SUCCESS;
}


long wolfSSL_CTX_set_tlsext_status_arg(WOLFSSL_CTX* ctx, void* arg)
{
    if (ctx == NULL || ctx->cm == NULL) {
        return WOLFSSL_FAILURE;
    }

    ctx->cm->ocspIOCtx = arg;
    return WOLFSSL_SUCCESS;
}

#endif /* NO_CERTS */


/* Get the session cache mode for CTX
 *
 * ctx  WOLFSSL_CTX struct to get cache mode from
 *
 * Returns a bit mask that has the session cache mode */
WOLFSSL_API long wolfSSL_CTX_get_session_cache_mode(WOLFSSL_CTX* ctx)
{
    long m = 0;

    WOLFSSL_ENTER("SSL_CTX_set_session_cache_mode");

    if (ctx == NULL) {
        return m;
    }

    if (ctx->sessionCacheOff != 1) {
        m |= SSL_SESS_CACHE_SERVER;
    }

    if (ctx->sessionCacheFlushOff == 1) {
        m |= SSL_SESS_CACHE_NO_AUTO_CLEAR;
    }

#ifdef HAVE_EXT_CACHE
    if (ctx->internalCacheOff == 1) {
        m |= SSL_SESS_CACHE_NO_INTERNAL_STORE;
    }
#endif

    return m;
}


int wolfSSL_CTX_get_read_ahead(WOLFSSL_CTX* ctx)
{
    if (ctx == NULL) {
        return WOLFSSL_FAILURE;
    }

    return ctx->readAhead;
}


int wolfSSL_CTX_set_read_ahead(WOLFSSL_CTX* ctx, int v)
{
    if (ctx == NULL) {
        return WOLFSSL_FAILURE;
    }

    ctx->readAhead = (byte)v;

    return WOLFSSL_SUCCESS;
}


long wolfSSL_CTX_set_tlsext_opaque_prf_input_callback_arg(WOLFSSL_CTX* ctx,
        void* arg)
{
    if (ctx == NULL) {
        return WOLFSSL_FAILURE;
    }

    ctx->userPRFArg = arg;
    return WOLFSSL_SUCCESS;
}


#ifndef NO_DES3
/* 0 on success */
int wolfSSL_DES_set_key(WOLFSSL_const_DES_cblock* myDes,
                                               WOLFSSL_DES_key_schedule* key)
{
#ifdef WOLFSSL_CHECK_DESKEY
    return wolfSSL_DES_set_key_checked(myDes, key);
#else
    wolfSSL_DES_set_key_unchecked(myDes, key);
    return 0;
#endif
}



/* return true in fail case (1) */
static int DES_check(word32 mask, word32 mask2, unsigned char* key)
{
    word32 value[2];

    /* sanity check on length made in wolfSSL_DES_set_key_checked */
    value[0] = mask;
    value[1] = mask2;
    return (XMEMCMP(value, key, sizeof(value)) == 0)? 1: 0;
}


/* check that the key is odd parity and is not a weak key
 * returns -1 if parity is wrong, -2 if weak/null key and 0 on success */
int wolfSSL_DES_set_key_checked(WOLFSSL_const_DES_cblock* myDes,
                                               WOLFSSL_DES_key_schedule* key)
{
    if (myDes == NULL || key == NULL) {
        WOLFSSL_MSG("Bad argument passed to wolfSSL_DES_set_key_checked");
        return -2;
    }
    else {
        word32 sz = sizeof(WOLFSSL_DES_key_schedule);

        /* sanity check before call to DES_check */
        if (sz != (sizeof(word32) * 2)) {
            WOLFSSL_MSG("Unexpected WOLFSSL_DES_key_schedule size");
            return -2;
        }

        /* check odd parity */
        if (wolfSSL_DES_check_key_parity(myDes) != 1) {
            WOLFSSL_MSG("Odd parity test fail");
            return -1;
        }

        if (wolfSSL_DES_is_weak_key(myDes) == 1) {
            WOLFSSL_MSG("Weak key found");
            return -2;
        }

        /* passed tests, now copy over key */
        XMEMCPY(key, myDes, sizeof(WOLFSSL_const_DES_cblock));

        return 0;
    }
}


/* check is not weak. Weak key list from Nist "Recommendation for the Triple
 * Data Encryption Algorithm (TDEA) Block Cipher"
 *
 * returns 1 if is weak 0 if not
 */
int wolfSSL_DES_is_weak_key(WOLFSSL_const_DES_cblock* key)
{
    word32 mask, mask2;

    WOLFSSL_ENTER("wolfSSL_DES_is_weak_key");

    if (key == NULL) {
        WOLFSSL_MSG("NULL key passed in");
        return 1;
    }

    mask = 0x01010101; mask2 = 0x01010101;
    if (DES_check(mask, mask2, *key)) {
        WOLFSSL_MSG("Weak key found");
        return 1;
    }

    mask = 0xFEFEFEFE; mask2 = 0xFEFEFEFE;
    if (DES_check(mask, mask2, *key)) {
        WOLFSSL_MSG("Weak key found");
        return 1;
    }

    mask = 0xE0E0E0E0; mask2 = 0xF1F1F1F1;
    if (DES_check(mask, mask2, *key)) {
        WOLFSSL_MSG("Weak key found");
        return 1;
    }

    mask = 0x1F1F1F1F; mask2 = 0x0E0E0E0E;
    if (DES_check(mask, mask2, *key)) {
        WOLFSSL_MSG("Weak key found");
        return 1;
    }

    /* semi-weak *key check (list from same Nist paper) */
    mask  = 0x011F011F; mask2 = 0x010E010E;
    if (DES_check(mask, mask2, *key) ||
       DES_check(ByteReverseWord32(mask), ByteReverseWord32(mask2), *key)) {
        WOLFSSL_MSG("Weak key found");
        return 1;
    }

    mask  = 0x01E001E0; mask2 = 0x01F101F1;
    if (DES_check(mask, mask2, *key) ||
       DES_check(ByteReverseWord32(mask), ByteReverseWord32(mask2), *key)) {
        WOLFSSL_MSG("Weak key found");
        return 1;
    }

    mask  = 0x01FE01FE; mask2 = 0x01FE01FE;
    if (DES_check(mask, mask2, *key) ||
       DES_check(ByteReverseWord32(mask), ByteReverseWord32(mask2), *key)) {
        WOLFSSL_MSG("Weak key found");
        return 1;
    }

    mask  = 0x1FE01FE0; mask2 = 0x0EF10EF1;
    if (DES_check(mask, mask2, *key) ||
       DES_check(ByteReverseWord32(mask), ByteReverseWord32(mask2), *key)) {
        WOLFSSL_MSG("Weak key found");
        return 1;
    }

    mask  = 0x1FFE1FFE; mask2 = 0x0EFE0EFE;
    if (DES_check(mask, mask2, *key) ||
       DES_check(ByteReverseWord32(mask), ByteReverseWord32(mask2), *key)) {
        WOLFSSL_MSG("Weak key found");
        return 1;
    }

    return 0;
}


void wolfSSL_DES_set_key_unchecked(WOLFSSL_const_DES_cblock* myDes,
                                               WOLFSSL_DES_key_schedule* key)
{
    if (myDes != NULL && key != NULL) {
        XMEMCPY(key, myDes, sizeof(WOLFSSL_const_DES_cblock));
    }
}


/* Sets the parity of the DES key for use */
void wolfSSL_DES_set_odd_parity(WOLFSSL_DES_cblock* myDes)
{
    word32 i;
    word32 sz = sizeof(WOLFSSL_DES_cblock);

    WOLFSSL_ENTER("wolfSSL_DES_set_odd_parity");

    for (i = 0; i < sz; i++) {
        unsigned char c = (*myDes)[i];
        if ((
            ((c >> 1) & 0x01) ^
            ((c >> 2) & 0x01) ^
            ((c >> 3) & 0x01) ^
            ((c >> 4) & 0x01) ^
            ((c >> 5) & 0x01) ^
            ((c >> 6) & 0x01) ^
            ((c >> 7) & 0x01)) == (c & 0x01)) {
            WOLFSSL_MSG("Flipping parity bit");
            (*myDes)[i] = c ^ 0x01;
        }
    }
}

int wolfSSL_DES_check_key_parity(WOLFSSL_DES_cblock *myDes)
{
    word32 i;
    word32 sz = sizeof(WOLFSSL_DES_cblock);

    WOLFSSL_ENTER("wolfSSL_DES_check_key_parity");

    for (i = 0; i < sz; i++) {
        unsigned char c = (*myDes)[i];
        if ((
            ((c >> 1) & 0x01) ^
            ((c >> 2) & 0x01) ^
            ((c >> 3) & 0x01) ^
            ((c >> 4) & 0x01) ^
            ((c >> 5) & 0x01) ^
            ((c >> 6) & 0x01) ^
            ((c >> 7) & 0x01)) == (c & 0x01)) {
            return 0;
        }
    }
    return 1;
}

#ifdef WOLFSSL_DES_ECB
/* Encrypt or decrypt input message desa with key and get output in desb.
 * if enc is DES_ENCRYPT,input message is encrypted or
 * if enc is DES_DECRYPT,input message is decrypted.
 * */
void wolfSSL_DES_ecb_encrypt(WOLFSSL_DES_cblock* desa,
             WOLFSSL_DES_cblock* desb, WOLFSSL_DES_key_schedule* key, int enc)
{
    Des myDes;

    WOLFSSL_ENTER("wolfSSL_DES_ecb_encrypt");

    if (desa == NULL || key == NULL || desb == NULL ||
        (enc != DES_ENCRYPT && enc != DES_DECRYPT)) {
        WOLFSSL_MSG("Bad argument passed to wolfSSL_DES_ecb_encrypt");
    } else {
        if (wc_Des_SetKey(&myDes, (const byte*) key,
                           (const byte*) NULL, !enc) != 0) {
            WOLFSSL_MSG("wc_Des_SetKey return error.");
            return;
        }
        if (enc){
            if (wc_Des_EcbEncrypt(&myDes, (byte*) desb, (const byte*) desa,
                        sizeof(WOLFSSL_DES_cblock)) != 0){
                WOLFSSL_MSG("wc_Des_EcbEncrypt return error.");
            }
        } else {
            if (wc_Des_EcbDecrypt(&myDes, (byte*) desb, (const byte*) desa,
                        sizeof(WOLFSSL_DES_cblock)) != 0){
                WOLFSSL_MSG("wc_Des_EcbDecrpyt return error.");
            }
        }
    }
}
#endif
#endif /* NO_DES3 */

#ifndef NO_RC4
/* Set the key state for Arc4 structure.
 *
 * key  Arc4 structure to use
 * len  length of data buffer
 * data initial state to set Arc4 structure
 */
void wolfSSL_RC4_set_key(WOLFSSL_RC4_KEY* key, int len,
        const unsigned char* data)
{
    typedef char rc4_test[sizeof(WOLFSSL_RC4_KEY) >= sizeof(Arc4) ? 1 : -1];
    (void)sizeof(rc4_test);

    WOLFSSL_ENTER("wolfSSL_RC4_set_key");

    if (key == NULL || len < 0) {
        WOLFSSL_MSG("bad argument passed in");
        return;
    }

    XMEMSET(key, 0, sizeof(WOLFSSL_RC4_KEY));
    wc_Arc4SetKey((Arc4*)key, data, (word32)len);
}


/* Encrypt/decrypt with Arc4 structure.
 *
 * len length of buffer to encrypt/decrypt (in/out)
 * in  buffer to encrypt/decrypt
 * out results of encryption/decryption
 */
void wolfSSL_RC4(WOLFSSL_RC4_KEY* key, size_t len,
        const unsigned char* in, unsigned char* out)
{
    WOLFSSL_ENTER("wolfSSL_RC4");

    if (key == NULL || in == NULL || out == NULL) {
        WOLFSSL_MSG("Bad argument passed in");
        return;
    }

    wc_Arc4Process((Arc4*)key, out, in, (word32)len);
}
#endif /* NO_RC4 */

#ifndef NO_AES

#ifdef WOLFSSL_AES_DIRECT
/* AES encrypt direct, it is expected to be blocks of AES_BLOCK_SIZE for input.
 *
 * input  Data to encrypt
 * output Encrypted data after done
 * key    AES key to use for encryption
 */
void wolfSSL_AES_encrypt(const unsigned char* input, unsigned char* output,
        AES_KEY *key)
{
    WOLFSSL_ENTER("wolfSSL_AES_encrypt");

    if (input == NULL || output == NULL || key == NULL) {
        WOLFSSL_MSG("Null argument passed in");
        return;
    }

    wc_AesEncryptDirect((Aes*)key, output, input);
}


/* AES decrypt direct, it is expected to be blocks of AES_BLOCK_SIZE for input.
 *
 * input  Data to decrypt
 * output Decrypted data after done
 * key    AES key to use for encryption
 */
void wolfSSL_AES_decrypt(const unsigned char* input, unsigned char* output,
        AES_KEY *key)
{
    WOLFSSL_ENTER("wolfSSL_AES_decrypt");

    if (input == NULL || output == NULL || key == NULL) {
        WOLFSSL_MSG("Null argument passed in");
        return;
    }

    wc_AesDecryptDirect((Aes*)key, output, input);
}
#endif /* WOLFSSL_AES_DIRECT */

/* Setup of an AES key to use for encryption.
 *
 * key  key in bytes to use for encryption
 * bits size of key in bits
 * aes  AES structure to initialize
 */
int wolfSSL_AES_set_encrypt_key(const unsigned char *key, const int bits,
        AES_KEY *aes)
{
    typedef char aes_test[sizeof(AES_KEY) >= sizeof(Aes) ? 1 : -1];
    (void)sizeof(aes_test);

    WOLFSSL_ENTER("wolfSSL_AES_set_encrypt_key");

    if (key == NULL || aes == NULL) {
        WOLFSSL_MSG("Null argument passed in");
        return -1;
    }

    XMEMSET(aes, 0, sizeof(AES_KEY));
    if (wc_AesSetKey((Aes*)aes, key, ((bits)/8), NULL, AES_ENCRYPTION) != 0) {
        WOLFSSL_MSG("Error in setting AES key");
        return -1;
    }
    return 0;
}


/* Setup of an AES key to use for decryption.
 *
 * key  key in bytes to use for decryption
 * bits size of key in bits
 * aes  AES structure to initialize
 */
int wolfSSL_AES_set_decrypt_key(const unsigned char *key, const int bits,
        AES_KEY *aes)
{
    typedef char aes_test[sizeof(AES_KEY) >= sizeof(Aes) ? 1 : -1];
    (void)sizeof(aes_test);

    WOLFSSL_ENTER("wolfSSL_AES_set_decrypt_key");

    if (key == NULL || aes == NULL) {
        WOLFSSL_MSG("Null argument passed in");
        return -1;
    }

    XMEMSET(aes, 0, sizeof(AES_KEY));
    if (wc_AesSetKey((Aes*)aes, key, ((bits)/8), NULL, AES_DECRYPTION) != 0) {
        WOLFSSL_MSG("Error in setting AES key");
        return -1;
    }
    return 0;
}


#ifdef HAVE_AES_ECB
/* Encrypt/decrypt a 16 byte block of data using the key passed in.
 *
 * in  buffer to encrypt/decrypt
 * out buffer to hold result of encryption/decryption
 * key AES structure to use with encryption/decryption
 * enc AES_ENCRPT for encryption and AES_DECRYPT for decryption
 */
void wolfSSL_AES_ecb_encrypt(const unsigned char *in, unsigned char* out,
                             AES_KEY *key, const int enc)
{
    Aes* aes;

    WOLFSSL_ENTER("wolfSSL_AES_ecb_encrypt");

    if (key == NULL || in == NULL || out == NULL) {
        WOLFSSL_MSG("Error, Null argument passed in");
        return;
    }

    aes = (Aes*)key;
    if (enc == AES_ENCRYPT) {
        if (wc_AesEcbEncrypt(aes, out, in, AES_BLOCK_SIZE) != 0) {
            WOLFSSL_MSG("Error with AES CBC encrypt");
        }
    }
    else {
    #ifdef HAVE_AES_DECRYPT
        if (wc_AesEcbDecrypt(aes, out, in, AES_BLOCK_SIZE) != 0) {
            WOLFSSL_MSG("Error with AES CBC decrypt");
        }
    #else
        WOLFSSL_MSG("AES decryption not compiled in");
    #endif
    }
}
#endif /* HAVE_AES_ECB */

#ifdef HAVE_AES_CBC
/* Encrypt data using key and iv passed in. iv gets updated to most recent iv
 * state after encryption/decryption.
 *
 * in  buffer to encrypt/decrypt
 * out buffer to hold result of encryption/decryption
 * len length of input buffer
 * key AES structure to use with encryption/decryption
 * iv  iv to use with operation
 * enc AES_ENCRPT for encryption and AES_DECRYPT for decryption
 */
void wolfSSL_AES_cbc_encrypt(const unsigned char *in, unsigned char* out,
        size_t len, AES_KEY *key, unsigned char* iv, const int enc)
{
    Aes* aes;

    WOLFSSL_ENTER("wolfSSL_AES_cbc_encrypt");

    if (key == NULL || in == NULL || out == NULL || iv == NULL || len == 0) {
        WOLFSSL_MSG("Error, Null argument passed in");
        return;
    }

    aes = (Aes*)key;
    if (wc_AesSetIV(aes, (const byte*)iv) != 0) {
        WOLFSSL_MSG("Error with setting iv");
        return;
    }

    if (enc == AES_ENCRYPT) {
        if (wc_AesCbcEncrypt(aes, out, in, (word32)len) != 0) {
            WOLFSSL_MSG("Error with AES CBC encrypt");
        }
    }
    else {
        if (wc_AesCbcDecrypt(aes, out, in, (word32)len) != 0) {
            WOLFSSL_MSG("Error with AES CBC decrypt");
        }
    }

    /* to be compatible copy iv to iv buffer after completing operation */
    XMEMCPY(iv, (byte*)(aes->reg), AES_BLOCK_SIZE);
}
#endif /* HAVE_AES_CBC */


/* Encrypt data using CFB mode with key and iv passed in. iv gets updated to
 * most recent iv state after encryption/decryption.
 *
 * in  buffer to encrypt/decrypt
 * out buffer to hold result of encryption/decryption
 * len length of input buffer
 * key AES structure to use with encryption/decryption
 * iv  iv to use with operation
 * num contains the amount of block used
 * enc AES_ENCRPT for encryption and AES_DECRYPT for decryption
 */
void wolfSSL_AES_cfb128_encrypt(const unsigned char *in, unsigned char* out,
        size_t len, AES_KEY *key, unsigned char* iv, int* num,
        const int enc)
{
#ifndef WOLFSSL_AES_CFB
    WOLFSSL_MSG("CFB mode not enabled please use macro WOLFSSL_AES_CFB");
    (void)in;
    (void)out;
    (void)len;
    (void)key;
    (void)iv;
    (void)num;
    (void)enc;

    return;
#else
    Aes* aes;

    WOLFSSL_ENTER("wolfSSL_AES_cbc_encrypt");
    if (key == NULL || in == NULL || out == NULL || iv == NULL) {
        WOLFSSL_MSG("Error, Null argument passed in");
        return;
    }

    aes = (Aes*)key;
    if (wc_AesSetIV(aes, (const byte*)iv) != 0) {
        WOLFSSL_MSG("Error with setting iv");
        return;
    }

    if (enc == AES_ENCRYPT) {
        if (wc_AesCfbEncrypt(aes, out, in, (word32)len) != 0) {
            WOLFSSL_MSG("Error with AES CBC encrypt");
        }
    }
    else {
        if (wc_AesCfbDecrypt(aes, out, in, (word32)len) != 0) {
            WOLFSSL_MSG("Error with AES CBC decrypt");
        }
    }

    /* to be compatible copy iv to iv buffer after completing operation */
    XMEMCPY(iv, (byte*)(aes->reg), AES_BLOCK_SIZE);

    /* store number of left over bytes to num */
    *num = (aes->left)? AES_BLOCK_SIZE - aes->left : 0;
#endif /* WOLFSSL_AES_CFB */
}

/* wc_AesKey*Wrap_ex API not available in FIPS and SELFTEST */
#if defined(HAVE_AES_KEYWRAP) && !defined(HAVE_FIPS) && !defined(HAVE_SELFTEST)
int wolfSSL_AES_wrap_key(AES_KEY *key, const unsigned char *iv,
                 unsigned char *out,
                 const unsigned char *in, unsigned int inlen)
{
    int ret;

    WOLFSSL_ENTER("wolfSSL_AES_wrap_key");

    if (out == NULL || in == NULL) {
        WOLFSSL_MSG("Error, Null argument passed in");
        return WOLFSSL_FAILURE;
    }

    ret = wc_AesKeyWrap_ex((Aes*)key, in, inlen, out, inlen + KEYWRAP_BLOCK_SIZE, iv);

    return ret < 0 ? WOLFSSL_FAILURE : ret;
}

int wolfSSL_AES_unwrap_key(AES_KEY *key, const unsigned char *iv,
                   unsigned char *out,
                   const unsigned char *in, unsigned int inlen)
{
    int ret;

    WOLFSSL_ENTER("wolfSSL_AES_wrap_key");

    if (out == NULL || in == NULL) {
        WOLFSSL_MSG("Error, Null argument passed in");
        return WOLFSSL_FAILURE;
    }

    ret = wc_AesKeyUnWrap_ex((Aes*)key, in, inlen, out, inlen + KEYWRAP_BLOCK_SIZE, iv);

    return ret < 0 ? WOLFSSL_FAILURE : ret;
}
#endif /* HAVE_AES_KEYWRAP && !HAVE_FIPS && !HAVE_SELFTEST */
#endif /* NO_AES */

#ifndef NO_FILESYSTEM
    #ifdef __clang__
        #pragma clang diagnostic push
        #pragma clang diagnostic ignored "-Wformat-nonliteral"
    #endif
#endif

#ifndef NO_BIO

#if !defined(NO_FILESYSTEM) && defined (OPENSSL_EXTRA)
/* returns amount printed on success, negative in fail case */
int wolfSSL_BIO_vprintf(WOLFSSL_BIO* bio, const char* format, va_list args)
{
    int ret = -1;

    if (bio == NULL)
        return WOLFSSL_FATAL_ERROR;

    switch (bio->type) {
        case WOLFSSL_BIO_FILE:
            if (bio->ptr == NULL) {
                va_end(args);
                return -1;
            }
            ret = XVFPRINTF((XFILE)bio->ptr, format, args);
            break;

        case WOLFSSL_BIO_MEMORY:
    /* In Visual Studio versions prior to Visual Studio 2013, the va_* symbols
       aren't defined. If using Visual Studio 2013 or later, define
       HAVE_VA_COPY. */
    #if defined(OPENSSL_EXTRA) && (!defined(_WIN32) || defined(HAVE_VA_COPY))
        case WOLFSSL_BIO_SSL:
            {
                int count;
                char* pt = NULL;
                va_list copy;

                #ifdef FUSION_RTOS
                   copy = args;    /* hack, depends on internal implementation
                                    * of va_list in VisualDSP++ */
                #else
                    va_copy(copy, args);
                #endif
                count = XVSNPRINTF(NULL, 0, format, args);
                if (count >= 0)
                {
                    pt = (char*)XMALLOC(count + 1, bio->heap,
                                        DYNAMIC_TYPE_TMP_BUFFER);
                    if (pt != NULL)
                    {
                        count = XVSNPRINTF(pt, count + 1, format, copy);
                        if (count >= 0)
                        {
                            ret = wolfSSL_BIO_write(bio, pt, count);
                        }
                        XFREE(pt, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
                    }
                }
                va_end(copy);
            }
            break;
    #endif

        default:
            WOLFSSL_MSG("Unsupported WOLFSSL_BIO type for wolfSSL_BIO_printf");
            break;
    }

    return ret;
}

/* returns amount printed on success, negative in fail case */
int wolfSSL_BIO_printf(WOLFSSL_BIO* bio, const char* format, ...)
{
    int ret;
    va_list args;
    va_start(args, format);

    ret = wolfSSL_BIO_vprintf(bio, format, args);

    va_end(args);

    return ret;
}

#endif /* !NO_FILESYSTEM && OPENSSL_EXTRA */

#if !defined(NO_FILESYSTEM) && defined(__clang__)
#pragma clang diagnostic pop
#endif

#undef  LINE_LEN
#define LINE_LEN 16
int wolfSSL_BIO_dump(WOLFSSL_BIO *bio, const char *buf, int length)
{
    int ret = 0;

    if (bio == NULL)
        return 0;

#ifndef NO_FILESYSTEM
    if (bio->type == WOLFSSL_BIO_FILE) {
        int i;
        char line[80];

        if (!buf) {
            return XFPUTS("\tNULL", (XFILE)bio->ptr);
        }

        XSPRINTF(line, "\t");
        for (i = 0; i < LINE_LEN; i++) {
            if (i < length)
                XSPRINTF(line + 1 + i * 3,"%02x ", buf[i]);
            else
                XSPRINTF(line + 1 + i * 3, "   ");
        }
        XSPRINTF(line + 1 + LINE_LEN * 3, "| ");
        for (i = 0; i < LINE_LEN; i++) {
            if (i < length) {
                XSPRINTF(line + 3 + LINE_LEN * 3 + i,
                     "%c", 31 < buf[i] && buf[i] < 127 ? buf[i] : '.');
            }
        }
        ret += XFPUTS(line, (XFILE)bio->ptr);

        if (length > LINE_LEN)
            ret += wolfSSL_BIO_dump(bio, buf + LINE_LEN, length - LINE_LEN);
    }
#else
    (void)buf;
    (void)length;
#endif

    return ret;
}

#ifndef NO_ASN_TIME
int wolfSSL_ASN1_UTCTIME_print(WOLFSSL_BIO* bio, const WOLFSSL_ASN1_UTCTIME* a)
{
    WOLFSSL_ENTER("ASN1_UTCTIME_print");
    if (bio == NULL || a == NULL) {
        return WOLFSSL_FAILURE;
    }
    if (a->type != ASN_UTC_TIME) {
        WOLFSSL_MSG("Error, not UTC_TIME");
        return WOLFSSL_FAILURE;
    }

    return wolfSSL_ASN1_TIME_print(bio, a);
}

#endif /* !NO_BIO */

/* Checks the ASN1 syntax of "a"
 * returns WOLFSSL_SUCCESS (1)  if correct otherwise WOLFSSL_FAILURE (0) */
int wolfSSL_ASN1_TIME_check(const WOLFSSL_ASN1_TIME* a)
{
#ifndef NO_ASN_TIME
    char buf[MAX_TIME_STRING_SZ];
#endif

    WOLFSSL_ENTER("wolfSSL_ASN1_TIME_check");

#ifndef NO_ASN_TIME
    /* if can parse the WOLFSSL_ASN1_TIME passed in then consider syntax good */
    if (wolfSSL_ASN1_TIME_to_string((WOLFSSL_ASN1_TIME*)a, buf,
                MAX_TIME_STRING_SZ) == NULL) {
        return WOLFSSL_FAILURE;
    }
    return WOLFSSL_SUCCESS;
#else
    (void)a;
    return WOLFSSL_FAILURE;
#endif    
}
#endif /* !NO_ASN_TIME */

#ifndef NO_WOLFSSL_STUB
int wolfSSL_ASN1_TIME_diff(int *pday, int *psec,
                   const WOLFSSL_ASN1_TIME *from, const WOLFSSL_ASN1_TIME *to)
{
    WOLFSSL_STUB("wolfSSL_ASN1_TIME_diff");
    (void)pday;
    (void)psec;
    (void)from;
    (void)to;
    return 0;
}

WOLFSSL_ASN1_TIME *wolfSSL_ASN1_TIME_set(WOLFSSL_ASN1_TIME *s, time_t t)
{
    WOLFSSL_STUB("wolfSSL_ASN1_TIME_set");
    (void)s;
    (void)t;
    return s;
}
#endif /* !NO_WOLFSSL_STUB */

int wolfSSL_ASN1_TIME_set_string(WOLFSSL_ASN1_TIME *s, const char *str)
{
    int slen;
    WOLFSSL_ENTER("wolfSSL_ASN1_TIME_set_string");

    if (!str) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }
    slen = (int)XSTRLEN(str)+1;
    if (slen > CTC_DATE_SIZE) {
        WOLFSSL_MSG("Date string too long");
        return WOLFSSL_FAILURE;
    }
    if (s) {
        XMEMCPY(s->data, str, slen);
        s->length = slen - 1; /* do not include null terminator in length */
        s->type = slen == ASN_UTC_TIME_SIZE ? V_ASN1_UTCTIME :
            V_ASN1_GENERALIZEDTIME;
    }
    return WOLFSSL_SUCCESS;
}

#ifndef NO_BIO

/* Return the month as a string.
 *
 * n  The number of the month as a two characters (1 based).
 * returns the month as a string.
 */
static WC_INLINE const char* MonthStr(const char* n)
{
    static const char monthStr[12][4] = {
            "Jan", "Feb", "Mar", "Apr", "May", "Jun",
            "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
    return monthStr[(n[0] - '0') * 10 + (n[1] - '0') - 1];
}

int wolfSSL_ASN1_GENERALIZEDTIME_print(WOLFSSL_BIO* bio,
    const WOLFSSL_ASN1_GENERALIZEDTIME* asnTime)
{
    const char* p;
    WOLFSSL_ENTER("wolfSSL_ASN1_GENERALIZEDTIME_print");

    if (bio == NULL || asnTime == NULL)
        return BAD_FUNC_ARG;

    if (asnTime->type != ASN_GENERALIZED_TIME) {
        WOLFSSL_MSG("Error, not GENERALIZED_TIME");
        return WOLFSSL_FAILURE;
    }
    p = (const char *)(asnTime->data);
    /* GetTimeString not always available. */
    if (wolfSSL_BIO_write(bio, MonthStr(p + 4), 3) <= 0)
        return WOLFSSL_FAILURE;
    if (wolfSSL_BIO_write(bio, " ", 1) <= 0)
        return WOLFSSL_FAILURE;

    /* Day */
    if (wolfSSL_BIO_write(bio, p + 6, 2) <= 0)
        return WOLFSSL_FAILURE;
    if (wolfSSL_BIO_write(bio, " ", 1) <= 0)
        return WOLFSSL_FAILURE;

    /* Hour */
    if (wolfSSL_BIO_write(bio, p + 8, 2) <= 0)
        return WOLFSSL_FAILURE;
    if (wolfSSL_BIO_write(bio, ":", 1) <= 0)
        return WOLFSSL_FAILURE;

    /* Min */
    if (wolfSSL_BIO_write(bio, p + 10, 2) <= 0)
        return WOLFSSL_FAILURE;
    if (wolfSSL_BIO_write(bio, ":", 1) <= 0)
        return WOLFSSL_FAILURE;

    /* Secs */
    if (wolfSSL_BIO_write(bio, p + 12, 2) <= 0)
        return WOLFSSL_FAILURE;
    if (wolfSSL_BIO_write(bio, " ", 1) <= 0)
        return WOLFSSL_FAILURE;
    if (wolfSSL_BIO_write(bio, p, 4) <= 0)
        return WOLFSSL_FAILURE;

    return 0;
}
#endif /* !NO_BIO */

void wolfSSL_ASN1_GENERALIZEDTIME_free(WOLFSSL_ASN1_TIME* asn1Time)
{
    WOLFSSL_ENTER("wolfSSL_ASN1_GENERALIZEDTIME_free");
    if (asn1Time == NULL)
        return;
    XMEMSET(asn1Time->data, 0, sizeof(asn1Time->data));
}

#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
int wolfSSL_sk_num(const WOLFSSL_STACK* sk)
{
    WOLFSSL_ENTER("wolfSSL_sk_num");
    if (sk == NULL)
        return 0;
    return (int)sk->num;
}

void* wolfSSL_sk_value(const WOLFSSL_STACK* sk, int i)
{
    WOLFSSL_ENTER("wolfSSL_sk_value");

    for (; sk != NULL && i > 0; i--)
        sk = sk->next;
    if (sk == NULL)
        return NULL;

    switch (sk->type) {
        case STACK_TYPE_X509:
            return (void*)sk->data.x509;
        case STACK_TYPE_CIPHER:
            return (void*)&sk->data.cipher;
        case STACK_TYPE_GEN_NAME:
            return (void*)sk->data.gn;
        case STACK_TYPE_ACCESS_DESCRIPTION:
            return (void*)sk->data.access;
        case STACK_TYPE_OBJ:
            return (void*)sk->data.obj;
        case STACK_TYPE_X509_EXT:
            return (void*)sk->data.ext;
    #ifdef OPENSSL_EXTRA
        case STACK_TYPE_CONF_VALUE:
            return (void*)sk->data.conf;
    #endif
        case STACK_TYPE_NULL:
        default:
            return (void*)sk->data.generic;
    }
}

/* copies over data of "in" to "out" */
static void wolfSSL_CIPHER_copy(WOLFSSL_CIPHER* in, WOLFSSL_CIPHER* out)
{
    if (in == NULL || out == NULL)
        return;

    *out = *in;
}

WOLFSSL_STACK* wolfSSL_sk_dup(WOLFSSL_STACK* sk)
{

    WOLFSSL_STACK* ret = NULL;
    WOLFSSL_STACK* last = NULL;

    WOLFSSL_ENTER("wolfSSL_sk_dup");

    while (sk) {
        WOLFSSL_STACK* cur = wolfSSL_sk_new_node(sk->heap);

        if (!cur) {
            WOLFSSL_MSG("wolfSSL_sk_new_node error");
            goto error;
        }

        if (!ret) {
            /* Set first node */
            ret = cur;
        }

        if (last) {
            last->next = cur;
        }

        XMEMCPY(cur, sk, sizeof(WOLFSSL_STACK));

        /* We will allocate new memory for this */
        XMEMSET(&cur->data, 0, sizeof(cur->data));
        cur->next = NULL;

        switch (sk->type) {
            case STACK_TYPE_X509:
                if (!sk->data.x509)
                    break;
                cur->data.x509 = wolfSSL_X509_dup(sk->data.x509);
                if (!cur->data.x509) {
                    WOLFSSL_MSG("wolfSSL_X509_dup error");
                    goto error;
                }
                break;
            case STACK_TYPE_CIPHER:
                wolfSSL_CIPHER_copy(&sk->data.cipher, &cur->data.cipher);
                break;
            case STACK_TYPE_GEN_NAME:
                if (!sk->data.gn)
                    break;
                cur->data.gn = wolfSSL_GENERAL_NAME_dup(sk->data.gn);
                if (!cur->data.gn) {
                    WOLFSSL_MSG("wolfSSL_GENERAL_NAME_new error");
                    goto error;
                }
                break;
            case STACK_TYPE_OBJ:
                if (!sk->data.obj)
                    break;
                cur->data.obj = wolfSSL_ASN1_OBJECT_dup(sk->data.obj);
                if (!cur->data.obj) {
                    WOLFSSL_MSG("wolfSSL_ASN1_OBJECT_dup error");
                    goto error;
                }
                break;
            case STACK_TYPE_ACCESS_DESCRIPTION:
            case STACK_TYPE_X509_EXT:
            case STACK_TYPE_CONF_VALUE:
            case STACK_TYPE_NULL:
            default:
                WOLFSSL_MSG("Unsupported stack type");
                goto error;
        }

        sk = sk->next;
        last = cur;
    }
    return ret;

error:
    if (ret) {
        wolfSSL_sk_GENERAL_NAME_free(ret);
    }
    return NULL;
}

/* Free the structure for ASN1_OBJECT stack */
void wolfSSL_sk_free(WOLFSSL_STACK* sk)
{
    WOLFSSL_ENTER("wolfSSL_sk_free");

    if (sk == NULL) {
        WOLFSSL_MSG("Error, BAD_FUNC_ARG");
        return;
    }

    switch (sk->type) {
        case STACK_TYPE_X509:
            wolfSSL_sk_X509_free(sk);
            break;
        #if defined(OPENSSL_ALL)
        case STACK_TYPE_CIPHER:
            wolfSSL_sk_CIPHER_free(sk);
            break;
        #endif
        case STACK_TYPE_GEN_NAME:
            wolfSSL_sk_GENERAL_NAME_free(sk);
            break;
        #if defined(OPENSSL_ALL) || defined (WOLFSSL_QT)
        case STACK_TYPE_ACCESS_DESCRIPTION:
            wolfSSL_sk_ACCESS_DESCRIPTION_free(sk);
            break;
        #endif
        case STACK_TYPE_OBJ:
            wolfSSL_sk_ASN1_OBJECT_free(sk);
            break;
        #if defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY) || \
            defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)
        case STACK_TYPE_STRING:
            wolfSSL_sk_WOLFSSL_STRING_free(sk);
            break;
        #endif
        #ifdef OPENSSL_ALL
        case STACK_TYPE_X509_INFO:
            wolfSSL_sk_X509_INFO_free(sk);
            break;
        case STACK_TYPE_X509_NAME:
            wolfSSL_sk_X509_NAME_free(sk);
            break;
        case STACK_TYPE_CONF_VALUE:
            wolfSSL_sk_CONF_VALUE_free(sk);
            break;
        #endif
        case STACK_TYPE_NULL:
        default:
            wolfSSL_sk_GENERIC_free(sk);
    }
}

/* Frees each node in the stack and frees the stack.
 * Does not free any internal members of the stack nodes.
 */
void wolfSSL_sk_GENERIC_pop_free(WOLFSSL_STACK* sk,
    void (*f) (void*))
{
    WOLFSSL_STACK* node;
    WOLFSSL_STACK* tmp;
    WOLFSSL_ENTER("wolfSSL_sk_GENERIC_pop_free");

    if (sk == NULL)
        return;

    /* parse through stack freeing each node */
    node = sk->next;
    while (node) {
        tmp  = node;
        node = node->next;
        if (f)
            f(tmp->data.generic);
        tmp->data.generic = NULL;
        XFREE(tmp, NULL, DYNAMIC_TYPE_OPENSSL);
    }

    /* free head of stack */
    XFREE(sk, NULL, DYNAMIC_TYPE_ASN1);
}

/* return 1 on success 0 on fail */
int wolfSSL_sk_GENERIC_push(WOLFSSL_STACK* sk, void* generic)
{
    WOLFSSL_ENTER("wolfSSL_sk_GENERIC_push");

    return wolfSSL_sk_push(sk, generic);
}
void wolfSSL_sk_GENERIC_free(WOLFSSL_STACK* sk)
{
    wolfSSL_sk_GENERIC_pop_free(sk, NULL);
}
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#ifdef OPENSSL_EXTRA

/* Free all nodes in a stack */
void wolfSSL_sk_pop_free(WOLF_STACK_OF(WOLFSSL_ASN1_OBJECT)* sk,
                                                       wolfSSL_sk_freefunc func)
{
    WOLFSSL_ENTER("wolfSSL_sk_pop_free");

    if (sk == NULL) {
        WOLFSSL_MSG("Error, BAD_FUNC_ARG");
        return;
    }

    switch(sk->type) {
        #if defined(OPENSSL_ALL) || defined (WOLFSSL_QT)
        case STACK_TYPE_ACCESS_DESCRIPTION:
            wolfSSL_sk_ACCESS_DESCRIPTION_pop_free(sk,
                                                wolfSSL_ACCESS_DESCRIPTION_free);
            break;
        #endif
        case STACK_TYPE_X509:
            wolfSSL_sk_X509_pop_free(sk,(void (*)(WOLFSSL_X509*))func);
            break;
        case STACK_TYPE_OBJ:
            wolfSSL_sk_ASN1_OBJECT_pop_free(sk,
                                          (void (*)(WOLFSSL_ASN1_OBJECT*))func);
            break;
        case STACK_TYPE_GEN_NAME:
            wolfSSL_sk_GENERAL_NAME_pop_free(sk,
                                         (void (*)(WOLFSSL_GENERAL_NAME*))func);
            break;
        #ifdef OPENSSL_ALL
        case STACK_TYPE_X509_NAME:
            wolfSSL_sk_X509_NAME_pop_free(sk,
                                         (void (*)(WOLFSSL_X509_NAME*))func);
            break;
        case STACK_TYPE_X509_EXT:
            wolfSSL_sk_X509_EXTENSION_pop_free(sk,
                                       (void (*)(WOLFSSL_X509_EXTENSION*))func);
            break;
        #endif
        #if defined(OPENSSL_ALL)
        case STACK_TYPE_X509_INFO:
            wolfSSL_sk_X509_INFO_pop_free(sk,
                                            (void (*)(WOLFSSL_X509_INFO*))func);
            break;
        #endif
        default:
            wolfSSL_sk_GENERIC_pop_free(sk,
                                          (void (*)(void*))func);
            break;
    }
}
#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
/* Creates and returns a new null stack. */
WOLFSSL_STACK* wolfSSL_sk_new_null(void)
{
    WOLFSSL_STACK* sk;
    WOLFSSL_ENTER("wolfSSL_sk_new_null");

    sk = (WOLFSSL_STACK*)XMALLOC(sizeof(WOLFSSL_STACK), NULL,
                                 DYNAMIC_TYPE_OPENSSL);
    if (sk == NULL) {
        WOLFSSL_MSG("WOLFSSL_STACK memory error");
        return NULL;
    }

    XMEMSET(sk, 0, sizeof(WOLFSSL_STACK));
    sk->type = STACK_TYPE_NULL;

    return sk;
}

WOLFSSL_BASIC_CONSTRAINTS* wolfSSL_BASIC_CONSTRAINTS_new(void)
{
    WOLFSSL_BASIC_CONSTRAINTS* bc;
    bc = (WOLFSSL_BASIC_CONSTRAINTS*)
          XMALLOC(sizeof(WOLFSSL_BASIC_CONSTRAINTS), NULL,
          DYNAMIC_TYPE_X509_EXT);
    if (bc == NULL) {
        WOLFSSL_MSG("Failed to malloc basic constraints");
        return NULL;
    }
    XMEMSET(bc, 0, sizeof(WOLFSSL_BASIC_CONSTRAINTS));
    return bc;
}

/* frees the wolfSSL_BASIC_CONSTRAINTS object */
void wolfSSL_BASIC_CONSTRAINTS_free(WOLFSSL_BASIC_CONSTRAINTS *bc)
{
    WOLFSSL_ENTER("wolfSSL_BASIC_CONSTRAINTS_free");
    if (bc == NULL) {
        WOLFSSL_MSG("Argument is NULL");
        return;
    }
    if (bc->pathlen) {
        wolfSSL_ASN1_INTEGER_free(bc->pathlen);
    }
    XFREE(bc, NULL, DYNAMIC_TYPE_OPENSSL);
}

WOLFSSL_AUTHORITY_KEYID* wolfSSL_AUTHORITY_KEYID_new(void)
{
    WOLFSSL_AUTHORITY_KEYID* akey = (WOLFSSL_AUTHORITY_KEYID*)XMALLOC(
          sizeof(WOLFSSL_AUTHORITY_KEYID), NULL, DYNAMIC_TYPE_OPENSSL);
    if (!akey) {
        WOLFSSL_MSG("Issue creating WOLFSSL_AUTHORITY_KEYID struct");
        return NULL;
    }
    XMEMSET(akey, 0, sizeof(WOLFSSL_AUTHORITY_KEYID));
    return akey;
}

/* frees the wolfSSL_AUTHORITY_KEYID object */
void wolfSSL_AUTHORITY_KEYID_free(WOLFSSL_AUTHORITY_KEYID *id)
{
    WOLFSSL_ENTER("wolfSSL_AUTHORITY_KEYID_free");
    if(id == NULL) {
        WOLFSSL_MSG("Argument is NULL");
        return;
    }
    if (id->keyid) {
        wolfSSL_ASN1_STRING_free(id->keyid);
    }
    if (id->issuer) {
        wolfSSL_ASN1_OBJECT_free(id->issuer);
    }
    if (id->serial) {
        wolfSSL_ASN1_INTEGER_free(id->serial);
    }
    XFREE(id, NULL, DYNAMIC_TYPE_OPENSSL);
}

int wolfSSL_sk_SSL_COMP_num(WOLF_STACK_OF(WOLFSSL_COMP)* sk)
{
    if (sk == NULL)
        return 0;
    return (int)sk->num;
}

#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#if !defined(NO_SESSION_CACHE) && (defined(OPENSSL_EXTRA) || \
        defined(HAVE_EXT_CACHE))
/* stunnel 4.28 needs
 *
 * Callback that is called if a session tries to resume but could not find
 * the session to resume it.
 */
void wolfSSL_CTX_sess_set_get_cb(WOLFSSL_CTX* ctx,
                    WOLFSSL_SESSION*(*f)(WOLFSSL*, unsigned char*, int, int*))
{
    if (ctx == NULL)
        return;

#ifdef HAVE_EXT_CACHE
    ctx->get_sess_cb = f;
#else
    (void)f;
#endif
}

void wolfSSL_CTX_sess_set_new_cb(WOLFSSL_CTX* ctx,
                             int (*f)(WOLFSSL*, WOLFSSL_SESSION*))
{
    if (ctx == NULL)
        return;

#ifdef HAVE_EXT_CACHE
    ctx->new_sess_cb = f;
#else
    (void)f;
#endif
}

void wolfSSL_CTX_sess_set_remove_cb(WOLFSSL_CTX* ctx, void (*f)(WOLFSSL_CTX*,
                                                        WOLFSSL_SESSION*))
{
    if (ctx == NULL)
        return;

#ifdef HAVE_EXT_CACHE
    ctx->rem_sess_cb = f;
#else
    (void)f;
#endif
}


/*
 *
 * Note: It is expected that the importing and exporting function have been
 *       built with the same settings. For example if session tickets was
 *       enabled with the wolfSSL library exporting a session then it is
 *       expected to be turned on with the wolfSSL library importing the session.
 */
int wolfSSL_i2d_SSL_SESSION(WOLFSSL_SESSION* sess, unsigned char** p)
{
    int size = 0;
#ifdef HAVE_EXT_CACHE
    int idx = 0;
#ifdef SESSION_CERTS
    int i;
#endif
    unsigned char *data;

    if (sess == NULL) {
        return BAD_FUNC_ARG;
    }

    /* side | bornOn | timeout | sessionID len | sessionID | masterSecret |
     * haveEMS  */
    size += OPAQUE8_LEN + OPAQUE32_LEN + OPAQUE32_LEN + OPAQUE8_LEN +
            sess->sessionIDSz + SECRET_LEN + OPAQUE8_LEN;
#ifdef SESSION_CERTS
    /* Peer chain */
    size += OPAQUE8_LEN;
    for (i = 0; i < sess->chain.count; i++)
        size += OPAQUE16_LEN + sess->chain.certs[i].length;
#endif
#if defined(SESSION_CERTS) || (defined(WOLFSSL_TLS13) && \
                               defined(HAVE_SESSION_TICKET))
    /* Protocol version */
    size += OPAQUE16_LEN;
#endif
#if defined(SESSION_CERTS) || !defined(NO_RESUME_SUITE_CHECK) || \
                        (defined(WOLFSSL_TLS13) && defined(HAVE_SESSION_TICKET))
    /* cipher suite */
    size += OPAQUE16_LEN;
#endif
#ifndef NO_CLIENT_CACHE
    /* ServerID len | ServerID */
    size += OPAQUE16_LEN + sess->idLen;
#endif
#ifdef OPENSSL_EXTRA
    /* session context ID len | session context ID */
    size += OPAQUE8_LEN + sess->sessionCtxSz;
#endif
#ifdef WOLFSSL_TLS13
    /* namedGroup */
    size += OPAQUE16_LEN;
#endif
#if defined(HAVE_SESSION_TICKET) || !defined(NO_PSK)
#ifdef WOLFSSL_TLS13
    /* ticketSeen | ticketAdd */
    size += OPAQUE32_LEN + OPAQUE32_LEN;
    /* ticketNonce */
    size += OPAQUE8_LEN + sess->ticketNonce.len;
#endif
#ifdef WOLFSSL_EARLY_DATA
    size += OPAQUE32_LEN;
#endif
#endif
#ifdef HAVE_SESSION_TICKET
    /* ticket len | ticket */
    size += OPAQUE16_LEN + sess->ticketLen;
#endif

    if (p != NULL) {
        if (*p == NULL)
            *p = (unsigned char*)XMALLOC(size, NULL, DYNAMIC_TYPE_OPENSSL);
        if (*p == NULL)
            return 0;
        data = *p;

        data[idx++] = sess->side;
        c32toa(sess->bornOn, data + idx); idx += OPAQUE32_LEN;
        c32toa(sess->timeout, data + idx); idx += OPAQUE32_LEN;
        data[idx++] = sess->sessionIDSz;
        XMEMCPY(data + idx, sess->sessionID, sess->sessionIDSz);
        idx += sess->sessionIDSz;
        XMEMCPY(data + idx, sess->masterSecret, SECRET_LEN); idx += SECRET_LEN;
        data[idx++] = (byte)sess->haveEMS;
#ifdef SESSION_CERTS
        data[idx++] = (byte)sess->chain.count;
        for (i = 0; i < sess->chain.count; i++) {
            c16toa((word16)sess->chain.certs[i].length, data + idx);
            idx += OPAQUE16_LEN;
            XMEMCPY(data + idx, sess->chain.certs[i].buffer,
                    sess->chain.certs[i].length);
            idx += sess->chain.certs[i].length;
        }
#endif
#if defined(SESSION_CERTS) || (defined(WOLFSSL_TLS13) && \
                               defined(HAVE_SESSION_TICKET))
        data[idx++] = sess->version.major;
        data[idx++] = sess->version.minor;
#endif
#if defined(SESSION_CERTS) || !defined(NO_RESUME_SUITE_CHECK) || \
                        (defined(WOLFSSL_TLS13) && defined(HAVE_SESSION_TICKET))
        data[idx++] = sess->cipherSuite0;
        data[idx++] = sess->cipherSuite;
#endif
#ifndef NO_CLIENT_CACHE
        c16toa(sess->idLen, data + idx); idx += OPAQUE16_LEN;
        XMEMCPY(data + idx, sess->serverID, sess->idLen);
        idx += sess->idLen;
#endif
#ifdef OPENSSL_EXTRA
        data[idx++] = sess->sessionCtxSz;
        XMEMCPY(data + idx, sess->sessionCtx, sess->sessionCtxSz);
        idx += sess->sessionCtxSz;
#endif
#ifdef WOLFSSL_TLS13
        c16toa(sess->namedGroup, data + idx);
        idx += OPAQUE16_LEN;
#endif
#if defined(HAVE_SESSION_TICKET) || !defined(NO_PSK)
#ifdef WOLFSSL_TLS13
    c32toa(sess->ticketSeen, data + idx);
    idx += OPAQUE32_LEN;
    c32toa(sess->ticketAdd, data + idx);
    idx += OPAQUE32_LEN;
    data[idx++] = sess->ticketNonce.len;
    XMEMCPY(data + idx, sess->ticketNonce.data, sess->ticketNonce.len);
    idx += sess->ticketNonce.len;
#endif
#ifdef WOLFSSL_EARLY_DATA
        c32toa(sess->maxEarlyDataSz, data + idx);
        idx += OPAQUE32_LEN;
#endif
#endif
#ifdef HAVE_SESSION_TICKET
        c16toa(sess->ticketLen, data + idx); idx += OPAQUE16_LEN;
        XMEMCPY(data + idx, sess->ticket, sess->ticketLen);
        idx += sess->ticketLen;
#endif
    }
#endif

    (void)sess;
    (void)p;
#ifdef HAVE_EXT_CACHE
    (void)idx;
#endif

    return size;
}


/* TODO: no function to free new session.
 *
 * Note: It is expected that the importing and exporting function have been
 *       built with the same settings. For example if session tickets was
 *       enabled with the wolfSSL library exporting a session then it is
 *       expected to be turned on with the wolfSSL library importing the session.
 */
WOLFSSL_SESSION* wolfSSL_d2i_SSL_SESSION(WOLFSSL_SESSION** sess,
                                const unsigned char** p, long i)
{
    WOLFSSL_SESSION* s = NULL;
    int ret = 0;
#if defined(HAVE_EXT_CACHE)
    int idx;
    byte* data;
#ifdef SESSION_CERTS
    int j;
    word16 length;
#endif
#endif

    (void)p;
    (void)i;
    (void)ret;

    if (sess != NULL)
        s = *sess;

#ifdef HAVE_EXT_CACHE
    if (p == NULL || *p == NULL)
        return NULL;

    if (s == NULL) {
        s = wolfSSL_SESSION_new();
        if (s == NULL)
            return NULL;
#ifdef HAVE_SESSION_TICKET
        s->isDynamic = 0;
#endif
    }

    idx = 0;
    data = (byte*)*p;

    /* side | bornOn | timeout | sessionID len */
    if (i < OPAQUE8_LEN + OPAQUE32_LEN + OPAQUE32_LEN + OPAQUE8_LEN) {
        ret = BUFFER_ERROR;
        goto end;
    }
    s->side = data[idx++];
    ato32(data + idx, &s->bornOn); idx += OPAQUE32_LEN;
    ato32(data + idx, &s->timeout); idx += OPAQUE32_LEN;
    s->sessionIDSz = data[idx++];

    /* sessionID | secret | haveEMS */
    if (i - idx < s->sessionIDSz + SECRET_LEN + OPAQUE8_LEN) {
        ret = BUFFER_ERROR;
        goto end;
    }
    XMEMCPY(s->sessionID, data + idx, s->sessionIDSz);
    idx  += s->sessionIDSz;
    XMEMCPY(s->masterSecret, data + idx, SECRET_LEN); idx += SECRET_LEN;
    s->haveEMS = data[idx++];

#ifdef SESSION_CERTS
    /* Certificate chain */
    if (i - idx == 0) {
        ret = BUFFER_ERROR;
        goto end;
    }
    s->chain.count = data[idx++];
    for (j = 0; j < s->chain.count; j++) {
        if (i - idx < OPAQUE16_LEN) {
            ret = BUFFER_ERROR;
            goto end;
        }
        ato16(data + idx, &length); idx += OPAQUE16_LEN;
        s->chain.certs[j].length = length;
        if (i - idx < length) {
            ret = BUFFER_ERROR;
            goto end;
        }
        XMEMCPY(s->chain.certs[j].buffer, data + idx, length);
        idx += length;
    }
#endif
#if defined(SESSION_CERTS) || (defined(WOLFSSL_TLS13) && \
                               defined(HAVE_SESSION_TICKET))
    /* Protocol Version */
    if (i - idx < OPAQUE16_LEN) {
        ret = BUFFER_ERROR;
        goto end;
    }
    s->version.major = data[idx++];
    s->version.minor = data[idx++];
#endif
#if defined(SESSION_CERTS) || !defined(NO_RESUME_SUITE_CHECK) || \
                        (defined(WOLFSSL_TLS13) && defined(HAVE_SESSION_TICKET))
    /* Cipher suite */
    if (i - idx < OPAQUE16_LEN) {
        ret = BUFFER_ERROR;
        goto end;
    }
    s->cipherSuite0 = data[idx++];
    s->cipherSuite = data[idx++];
#endif
#ifndef NO_CLIENT_CACHE
    /* ServerID len */
    if (i - idx < OPAQUE16_LEN) {
        ret = BUFFER_ERROR;
        goto end;
    }
    ato16(data + idx, &s->idLen); idx += OPAQUE16_LEN;

    /* ServerID */
    if (i - idx < s->idLen) {
        ret = BUFFER_ERROR;
        goto end;
    }
    XMEMCPY(s->serverID, data + idx, s->idLen); idx += s->idLen;
#endif
#ifdef OPENSSL_EXTRA
    /* byte for length of session context ID */
    if (i - idx < OPAQUE8_LEN) {
        ret = BUFFER_ERROR;
        goto end;
    }
    s->sessionCtxSz = data[idx++];

    /* app session context ID */
    if (i - idx < s->sessionCtxSz) {
        ret = BUFFER_ERROR;
        goto end;
    }
    XMEMCPY(s->sessionCtx, data + idx, s->sessionCtxSz); idx += s->sessionCtxSz;
#endif
#ifdef WOLFSSL_TLS13
    if (i - idx < OPAQUE16_LEN) {
        ret = BUFFER_ERROR;
        goto end;
    }
    ato16(data + idx, &s->namedGroup);
    idx += OPAQUE16_LEN;
#endif
#if defined(HAVE_SESSION_TICKET) || !defined(NO_PSK)
#ifdef WOLFSSL_TLS13
    if (i - idx < (OPAQUE32_LEN * 2)) {
        ret = BUFFER_ERROR;
        goto end;
    }
    ato32(data + idx, &s->ticketSeen);
    idx += OPAQUE32_LEN;
    ato32(data + idx, &s->ticketAdd);
    idx += OPAQUE32_LEN;
    if (i - idx < OPAQUE8_LEN) {
        ret = BUFFER_ERROR;
        goto end;
    }
    s->ticketNonce.len = data[idx++];

    if (i - idx < s->ticketNonce.len) {
        ret = BUFFER_ERROR;
        goto end;
    }
    XMEMCPY(s->ticketNonce.data, data + idx, s->ticketNonce.len);
    idx += s->ticketNonce.len;
#endif
#ifdef WOLFSSL_EARLY_DATA
    if (i - idx < OPAQUE32_LEN) {
        ret = BUFFER_ERROR;
        goto end;
    }
    ato32(data + idx, &s->maxEarlyDataSz);
    idx += OPAQUE32_LEN;
#endif
#endif
#ifdef HAVE_SESSION_TICKET
    /* ticket len */
    if (i - idx < OPAQUE16_LEN) {
        ret = BUFFER_ERROR;
        goto end;
    }
    ato16(data + idx, &s->ticketLen); idx += OPAQUE16_LEN;

    /* Dispose of ol dynamic ticket and ensure space for new ticket. */
    if (s->isDynamic)
        XFREE(s->ticket, NULL, DYNAMIC_TYPE_SESSION_TICK);
    if (s->ticketLen <= SESSION_TICKET_LEN)
        s->ticket = s->staticTicket;
    else {
        s->ticket = (byte*)XMALLOC(s->ticketLen, NULL,
                                   DYNAMIC_TYPE_SESSION_TICK);
        if (s->ticket == NULL) {
            ret = MEMORY_ERROR;
            goto end;
        }
        s->isDynamic = 1;
    }

    /* ticket */
    if (i - idx < s->ticketLen) {
        ret = BUFFER_ERROR;
        goto end;
    }
    XMEMCPY(s->ticket, data + idx, s->ticketLen); idx += s->ticketLen;
#endif
    (void)idx;

    if (sess != NULL)
        *sess = s;

    *p += idx;

end:
    if (ret != 0 && (sess == NULL || *sess != s)) {
        wolfSSL_SESSION_free(s);
        s = NULL;
    }
#endif
    return s;
}

long wolfSSL_SESSION_get_timeout(const WOLFSSL_SESSION* sess)
{
    long timeout = 0;
    WOLFSSL_ENTER("wolfSSL_SESSION_get_timeout");
    if (sess)
        timeout = sess->timeout;
    return timeout;
}


long wolfSSL_SESSION_get_time(const WOLFSSL_SESSION* sess)
{
    long bornOn = 0;
    WOLFSSL_ENTER("wolfSSL_SESSION_get_time");
    if (sess)
        bornOn = sess->bornOn;
    return bornOn;
}

long wolfSSL_SSL_SESSION_set_timeout(WOLFSSL_SESSION* ses, long t)
{
    word32 tmptime;
    if (!ses || t < 0)
        return BAD_FUNC_ARG;

    tmptime = t & 0xFFFFFFFF;

    ses->timeout = tmptime;

    return WOLFSSL_SUCCESS;
}

#endif /* !NO_SESSION_CACHE && OPENSSL_EXTRA || HAVE_EXT_CACHE */


#ifdef KEEP_PEER_CERT
char*  wolfSSL_X509_get_subjectCN(WOLFSSL_X509* x509)
{
    if (x509 == NULL)
        return NULL;

    return x509->subjectCN;
}
#endif /* KEEP_PEER_CERT */

#ifdef OPENSSL_EXTRA

#if defined(FORTRESS) && !defined(NO_FILESYSTEM)
int wolfSSL_cmp_peer_cert_to_file(WOLFSSL* ssl, const char *fname)
{
    int ret = WOLFSSL_FATAL_ERROR;

    WOLFSSL_ENTER("wolfSSL_cmp_peer_cert_to_file");
    if (ssl != NULL && fname != NULL)
    {
    #ifdef WOLFSSL_SMALL_STACK
        byte           staticBuffer[1]; /* force heap usage */
    #else
        byte           staticBuffer[FILE_BUFFER_SIZE];
    #endif
        byte*          myBuffer  = staticBuffer;
        int            dynamic   = 0;
        XFILE          file;
        long           sz        = 0;
        WOLFSSL_CTX*   ctx       = ssl->ctx;
        WOLFSSL_X509*  peer_cert = &ssl->peerCert;
        DerBuffer*     fileDer = NULL;

        file = XFOPEN(fname, "rb");
        if (file == XBADFILE)
            return WOLFSSL_BAD_FILE;

        if (XFSEEK(file, 0, XSEEK_END) != 0) {
            XFCLOSE(file);
            return WOLFSSL_BAD_FILE;
        }
        sz = XFTELL(file);
        XREWIND(file);

        if (sz > MAX_WOLFSSL_FILE_SIZE || sz < 0) {
            WOLFSSL_MSG("cmp_peer_cert_to_file size error");
            XFCLOSE(file);
            return WOLFSSL_BAD_FILE;
        }

        if (sz > (long)sizeof(staticBuffer)) {
            WOLFSSL_MSG("Getting dynamic buffer");
            myBuffer = (byte*)XMALLOC(sz, ctx->heap, DYNAMIC_TYPE_FILE);
            dynamic = 1;
        }

        if ((myBuffer != NULL) &&
            (sz > 0) &&
            (XFREAD(myBuffer, 1, sz, file) == (size_t)sz) &&
            (PemToDer(myBuffer, (long)sz, CERT_TYPE,
                      &fileDer, ctx->heap, NULL, NULL) == 0) &&
            (fileDer->length != 0) &&
            (fileDer->length == peer_cert->derCert->length) &&
            (XMEMCMP(peer_cert->derCert->buffer, fileDer->buffer,
                                                fileDer->length) == 0))
        {
            ret = 0;
        }

        FreeDer(&fileDer);

        if (dynamic)
            XFREE(myBuffer, ctx->heap, DYNAMIC_TYPE_FILE);

        XFCLOSE(file);
    }

    return ret;
}
#endif
#endif /* OPENSSL_EXTRA */
#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
const WOLFSSL_ObjectInfo wolfssl_object_info[] = {
#ifndef NO_CERTS
    /* oidCertExtType */
    { NID_basic_constraints, BASIC_CA_OID, oidCertExtType, "basicConstraints",
                                                "X509v3 Basic Constraints"},
    { NID_subject_alt_name, ALT_NAMES_OID, oidCertExtType, "subjectAltName",
                                         "X509v3 Subject Alternative Name"},
    { CRL_DIST_OID, CRL_DIST_OID, oidCertExtType, "crlDistributionPoints",
                                          "X509v3 CRL Distribution Points"},
    { NID_info_access, AUTH_INFO_OID, oidCertExtType, "authorityInfoAccess",
                                            "Authority Information Access"},
    { NID_authority_key_identifier, AUTH_KEY_OID, oidCertExtType,
               "authorityKeyIdentifier", "X509v3 Authority Key Identifier"},
    { NID_subject_key_identifier, SUBJ_KEY_OID, oidCertExtType,
                   "subjectKeyIdentifier", "X509v3 Subject Key Identifier"},
    { NID_key_usage, KEY_USAGE_OID, oidCertExtType, "keyUsage",
                                                        "X509v3 Key Usage"},
    { NID_inhibit_any_policy, INHIBIT_ANY_OID, oidCertExtType,
                           "inhibitAnyPolicy", "X509v3 Inhibit Any Policy"},
    { NID_ext_key_usage, KEY_USAGE_OID, oidCertExtType,
                           "extendedKeyUsage", "X509v3 Extended Key Usage"},
    { NID_name_constraints, NAME_CONS_OID, oidCertExtType,
                              "nameConstraints", "X509v3 Name Constraints"},
    { NID_certificate_policies, CERT_POLICY_OID, oidCertExtType,
                      "certificatePolicies", "X509v3 Certificate Policies"},

    /* oidCertAuthInfoType */
    { AIA_OCSP_OID, AIA_OCSP_OID, oidCertAuthInfoType, "OCSP",
                                            "OCSP"},
    { AIA_CA_ISSUER_OID, AIA_CA_ISSUER_OID, oidCertAuthInfoType,
                                                 "caIssuers", "CA Issuers"},

    /* oidCertPolicyType */
    { NID_any_policy, CP_ANY_OID, oidCertPolicyType, "anyPolicy",
                                                       "X509v3 Any Policy"},

    /* oidCertAltNameType */
    { NID_hw_name_oid, HW_NAME_OID, oidCertAltNameType, "Hardware name",""},

    /* oidCertKeyUseType */
    { NID_anyExtendedKeyUsage, EKU_ANY_OID, oidCertKeyUseType,
                           "anyExtendedKeyUsage", "Any Extended Key Usage"},
    { EKU_SERVER_AUTH_OID, EKU_SERVER_AUTH_OID, oidCertKeyUseType,
                             "serverAuth", "TLS Web Server Authentication"},
    { EKU_CLIENT_AUTH_OID, EKU_CLIENT_AUTH_OID, oidCertKeyUseType,
                             "clientAuth", "TLS Web Client Authentication"},
    { EKU_OCSP_SIGN_OID, EKU_OCSP_SIGN_OID, oidCertKeyUseType,
                                             "OCSPSigning", "OCSP Signing"},

    /* oidCertNameType */
    { NID_commonName, NID_commonName, oidCertNameType, "CN", "commonName"},
    { NID_surname, NID_surname, oidCertNameType, "SN", "surname"},
    { NID_serialNumber, NID_serialNumber, oidCertNameType, "serialNumber",
                                                            "serialNumber"},
    { NID_countryName, NID_countryName, oidCertNameType, "C", "countryName"},
    { NID_localityName, NID_localityName, oidCertNameType, "L", "localityName"},
    { NID_stateOrProvinceName, NID_stateOrProvinceName, oidCertNameType, "ST",
                                                        "stateOrProvinceName"},
    { NID_organizationName, NID_organizationName, oidCertNameType, "O",
                                                        "organizationName"},
    { NID_organizationalUnitName, NID_organizationalUnitName, oidCertNameType,
                                                "OU", "organizationalUnitName"},
    { NID_emailAddress, NID_emailAddress, oidCertNameType, "emailAddress",
                                                            "emailAddress"},
    { NID_domainComponent, NID_domainComponent, oidCertNameType, "DC",
                                                            "domainComponent"},
    { NID_favouriteDrink, NID_favouriteDrink, oidCertNameType, "favouriteDrink",
                                                            "favouriteDrink"},
    { NID_businessCategory, NID_businessCategory, oidCertNameType, "businessCategory",
                                                            "businessCategory"},
    { NID_jurisdictionCountryName, NID_jurisdictionCountryName, oidCertNameType, "jurisdictionC",
                                                            "jurisdictionCountryName"},
    { NID_jurisdictionStateOrProvinceName, NID_jurisdictionStateOrProvinceName,
            oidCertNameType, "jurisdictionST", "jurisdictionStateOrProvinceName"},
#ifdef WOLFSSL_CERT_REQ
    { NID_pkcs9_challengePassword, CHALLENGE_PASSWORD_OID,
            oidCsrAttrType, "challengePassword", "challengePassword"},
#endif
#endif
#ifdef OPENSSL_EXTRA /* OPENSSL_EXTRA_X509_SMALL only needs the above */
        /* oidHashType */
    #ifdef WOLFSSL_MD2
        { NID_md2, MD2h, oidHashType, "MD2", "md2"},
    #endif
    #ifdef WOLFSSL_MD5
        { NID_md5, MD5h, oidHashType, "MD5", "md5"},
    #endif
    #ifndef NO_SHA
        { NID_sha1, SHAh, oidHashType, "SHA1", "sha1"},
    #endif
    #ifdef WOLFSSL_SHA224
        { NID_sha224, SHA224h, oidHashType, "SHA224", "sha224"},
    #endif
    #ifndef NO_SHA256
        { NID_sha256, SHA256h, oidHashType, "SHA256", "sha256"},
    #endif
    #ifdef WOLFSSL_SHA384
        { NID_sha384, SHA384h, oidHashType, "SHA384", "sha384"},
    #endif
    #ifdef WOLFSSL_SHA512
        { NID_sha512, SHA512h, oidHashType, "SHA512", "sha512"},
    #endif

        /* oidSigType */
    #ifndef NO_DSA
        #ifndef NO_SHA
        { CTC_SHAwDSA, CTC_SHAwDSA, oidSigType, "DSA-SHA1", "dsaWithSHA1"},
        { CTC_SHA256wDSA, CTC_SHA256wDSA, oidSigType, "dsa_with_SHA256",
                                                        "dsa_with_SHA256"},
        #endif
    #endif /* NO_DSA */
    #ifndef NO_RSA
        #ifdef WOLFSSL_MD2
        { CTC_MD2wRSA, CTC_MD2wRSA, oidSigType, "RSA-MD2",
                                                        "md2WithRSAEncryption"},
        #endif
        #ifndef NO_MD5
        { CTC_MD5wRSA, CTC_MD5wRSA, oidSigType, "RSA-MD5",
                                                        "md5WithRSAEncryption"},
        #endif
        #ifndef NO_SHA
        { CTC_SHAwRSA, CTC_SHAwRSA, oidSigType, "RSA-SHA1",
                                                       "sha1WithRSAEncryption"},
        #endif
        #ifdef WOLFSSL_SHA224
        { CTC_SHA224wRSA, CTC_SHA224wRSA, oidSigType, "RSA-SHA224",
                                                     "sha224WithRSAEncryption"},
        #endif
        #ifndef NO_SHA256
        { CTC_SHA256wRSA, CTC_SHA256wRSA, oidSigType, "RSA-SHA256",
                                                     "sha256WithRSAEncryption"},
        #endif
        #ifdef WOLFSSL_SHA384
        { CTC_SHA384wRSA, CTC_SHA384wRSA, oidSigType, "RSA-SHA384",
                                                     "sha384WithRSAEncryption"},
        #endif
        #ifdef WOLFSSL_SHA512
        { CTC_SHA512wRSA, CTC_SHA512wRSA, oidSigType, "RSA-SHA512",
                                                     "sha512WithRSAEncryption"},
        #endif
        #ifdef WOLFSSL_SHA3
        #ifndef WOLFSSL_NOSHA3_224
        { CTC_SHA3_224wRSA, CTC_SHA3_224wRSA, oidSigType, "RSA-SHA3-224",
                                                     "sha3-224WithRSAEncryption"},
        #endif
        #ifndef WOLFSSL_NOSHA3_256
        { CTC_SHA3_256wRSA, CTC_SHA3_256wRSA, oidSigType, "RSA-SHA3-256",
                                                     "sha3-256WithRSAEncryption"},
        #endif
        #ifndef WOLFSSL_NOSHA3_384
        { CTC_SHA3_384wRSA, CTC_SHA3_384wRSA, oidSigType, "RSA-SHA3-384",
                                                     "sha3-384WithRSAEncryption"},
        #endif
        #ifndef WOLFSSL_NOSHA3_512
        { CTC_SHA3_512wRSA, CTC_SHA3_512wRSA, oidSigType, "RSA-SHA3-512",
                                                     "sha3-512WithRSAEncryption"},
        #endif
        #endif
    #endif /* NO_RSA */
    #ifdef HAVE_ECC
        #ifndef NO_SHA
        { CTC_SHAwECDSA, CTC_SHAwECDSA, oidSigType, "ecdsa-with-SHA1", "shaWithECDSA"},
        #endif
        #ifdef WOLFSSL_SHA224
        { CTC_SHA224wECDSA, CTC_SHA224wECDSA, oidSigType, "ecdsa-with-SHA224","sha224WithECDSA"},
        #endif
        #ifndef NO_SHA256
        { CTC_SHA256wECDSA, CTC_SHA256wECDSA, oidSigType, "ecdsa-with-SHA256","sha256WithECDSA"},
        #endif
        #ifdef WOLFSSL_SHA384
        { CTC_SHA384wECDSA, CTC_SHA384wECDSA, oidSigType, "ecdsa-with-SHA384","sha384WithECDSA"},
        #endif
        #ifdef WOLFSSL_SHA512
        { CTC_SHA512wECDSA, CTC_SHA512wECDSA, oidSigType, "ecdsa-with-SHA512","sha512WithECDSA"},
        #endif
        #ifdef WOLFSSL_SHA3
        #ifndef WOLFSSL_NOSHA3_224
        { CTC_SHA3_224wECDSA, CTC_SHA3_224wECDSA, oidSigType, "ecdsa-with-SHA3-224",
                "sha3-224WithECDSA"},
        #endif
        #ifndef WOLFSSL_NOSHA3_256
        { CTC_SHA3_256wECDSA, CTC_SHA3_256wECDSA, oidSigType, "ecdsa-with-SHA3-256",
                "sha3-256WithECDSA"},
        #endif
        #ifndef WOLFSSL_NOSHA3_384
        { CTC_SHA3_384wECDSA, CTC_SHA3_384wECDSA, oidSigType, "ecdsa-with-SHA3-384",
                "sha3-384WithECDSA"},
        #endif
        #ifndef WOLFSSL_NOSHA3_512
        { CTC_SHA3_512wECDSA, CTC_SHA3_512wECDSA, oidSigType, "ecdsa-with-SHA3-512",
                "sha3-512WithECDSA"},
        #endif
        #endif
    #endif /* HAVE_ECC */

        /* oidKeyType */
    #ifndef NO_DSA
        { DSAk, DSAk, oidKeyType, "DSA", "dsaEncryption"},
        { NID_dsa, DSAk, oidKeyType, "DSA", "dsaEncryption"},
    #endif /* NO_DSA */
    #ifndef NO_RSA
        { RSAk, RSAk, oidKeyType, "RSA", "rsaEncryption"},
        { NID_rsaEncryption, RSAk, oidKeyType, "RSA", "rsaEncryption"},
    #endif /* NO_RSA */
    #ifdef HAVE_NTRU
        { NTRUk, NTRUk, oidKeyType, "NTRU", "ntruEncryption"},
    #endif /* HAVE_NTRU */
    #ifdef HAVE_ECC
        { ECDSAk, ECDSAk, oidKeyType, "ECDSA", "ecdsaEncryption"},
        { NID_X9_62_id_ecPublicKey, ECDSAk, oidKeyType, "id-ecPublicKey",
                                                        "id-ecPublicKey"},
    #endif /* HAVE_ECC */
    #ifndef NO_DH
        { NID_dhKeyAgreement, DHk, oidKeyType, "dhKeyAgreement", "dhKeyAgreement"},
    #endif
    #ifdef HAVE_ED448
        { NID_ED448, ED448k,  oidKeyType, "ED448", "ED448"},
    #endif
    #ifdef HAVE_ED25519
        { NID_ED25519, ED25519k,  oidKeyType, "ED25519", "ED25519"},
    #endif

        /* oidCurveType */
    #ifdef HAVE_ECC
        { NID_X9_62_prime192v1, ECC_SECP192R1_OID, oidCurveType, "prime192v1", "prime192v1"},
        { NID_X9_62_prime192v2, ECC_PRIME192V2_OID, oidCurveType, "prime192v2", "prime192v2"},
        { NID_X9_62_prime192v3, ECC_PRIME192V3_OID, oidCurveType, "prime192v3", "prime192v3"},

        { NID_X9_62_prime239v1, ECC_PRIME239V1_OID, oidCurveType, "prime239v1", "prime239v1"},
        { NID_X9_62_prime239v2, ECC_PRIME239V2_OID, oidCurveType, "prime239v2", "prime239v2"},
        { NID_X9_62_prime239v3, ECC_PRIME239V3_OID, oidCurveType, "prime239v3", "prime239v3"},

        { NID_X9_62_prime256v1, ECC_SECP256R1_OID, oidCurveType, "prime256v1", "prime256v1"},

        { NID_secp112r1, ECC_SECP112R1_OID,  oidCurveType, "secp112r1", "secp112r1"},
        { NID_secp112r2, ECC_SECP112R2_OID,  oidCurveType, "secp112r2", "secp112r2"},

        { NID_secp128r1, ECC_SECP128R1_OID,  oidCurveType, "secp128r1", "secp128r1"},
        { NID_secp128r2, ECC_SECP128R2_OID,  oidCurveType, "secp128r2", "secp128r2"},

        { NID_secp160r1, ECC_SECP160R1_OID,  oidCurveType, "secp160r1", "secp160r1"},
        { NID_secp160r2, ECC_SECP160R2_OID,  oidCurveType, "secp160r2", "secp160r2"},

        { NID_secp224r1, ECC_SECP224R1_OID,  oidCurveType, "secp224r1", "secp224r1"},
        { NID_secp384r1, ECC_SECP384R1_OID,  oidCurveType, "secp384r1", "secp384r1"},
        { NID_secp521r1, ECC_SECP521R1_OID,  oidCurveType, "secp521r1", "secp521r1"},

        { NID_secp160k1, ECC_SECP160K1_OID,  oidCurveType, "secp160k1", "secp160k1"},
        { NID_secp192k1, ECC_SECP192K1_OID,  oidCurveType, "secp192k1", "secp192k1"},
        { NID_secp224k1, ECC_SECP224K1_OID,  oidCurveType, "secp224k1", "secp224k1"},
        { NID_secp256k1, ECC_SECP256K1_OID,  oidCurveType, "secp256k1", "secp256k1"},

        { NID_brainpoolP160r1, ECC_BRAINPOOLP160R1_OID,  oidCurveType, "brainpoolP160r1", "brainpoolP160r1"},
        { NID_brainpoolP192r1, ECC_BRAINPOOLP192R1_OID,  oidCurveType, "brainpoolP192r1", "brainpoolP192r1"},
        { NID_brainpoolP224r1, ECC_BRAINPOOLP224R1_OID,  oidCurveType, "brainpoolP224r1", "brainpoolP224r1"},
        { NID_brainpoolP256r1, ECC_BRAINPOOLP256R1_OID,  oidCurveType, "brainpoolP256r1", "brainpoolP256r1"},
        { NID_brainpoolP320r1, ECC_BRAINPOOLP320R1_OID,  oidCurveType, "brainpoolP320r1", "brainpoolP320r1"},
        { NID_brainpoolP384r1, ECC_BRAINPOOLP384R1_OID,  oidCurveType, "brainpoolP384r1", "brainpoolP384r1"},
        { NID_brainpoolP512r1, ECC_BRAINPOOLP512R1_OID,  oidCurveType, "brainpoolP512r1", "brainpoolP512r1"},
    #endif /* HAVE_ECC */

        /* oidBlkType */
    #ifdef WOLFSSL_AES_128
        { AES128CBCb, AES128CBCb, oidBlkType, "AES-128-CBC", "aes-128-cbc"},
    #endif
    #ifdef WOLFSSL_AES_192
        { AES192CBCb, AES192CBCb, oidBlkType, "AES-192-CBC", "aes-192-cbc"},
    #endif
    #ifdef WOLFSSL_AES_256
        { AES256CBCb, AES256CBCb, oidBlkType, "AES-256-CBC", "aes-256-cbc"},
    #endif
    #ifndef NO_DES3
        { NID_des, DESb, oidBlkType, "DES-CBC", "des-cbc"},
        { NID_des3, DES3b, oidBlkType, "DES-EDE3-CBC", "des-ede3-cbc"},
    #endif /* !NO_DES3 */

        /* oidOcspType */
    #ifdef HAVE_OCSP
        { NID_id_pkix_OCSP_basic, OCSP_BASIC_OID, oidOcspType, "basicOCSPResponse",
                                                         "Basic OCSP Response"},
        { OCSP_NONCE_OID, OCSP_NONCE_OID, oidOcspType, "Nonce",
                                                                  "OCSP Nonce"},
    #endif /* HAVE_OCSP */

    #ifndef NO_PWDBASED
        /* oidKdfType */
        { PBKDF2_OID, PBKDF2_OID, oidKdfType, "PBKDFv2", "PBKDF2"},

        /* oidPBEType */
        { PBE_SHA1_RC4_128, PBE_SHA1_RC4_128, oidPBEType,
                                 "PBE-SHA1-RC4-128", "pbeWithSHA1And128BitRC4"},
        { PBE_SHA1_DES, PBE_SHA1_DES, oidPBEType, "PBE-SHA1-DES",
                                                       "pbeWithSHA1AndDES-CBC"},
        { PBE_SHA1_DES3, PBE_SHA1_DES3, oidPBEType, "PBE-SHA1-3DES",
                                            "pbeWithSHA1And3-KeyTripleDES-CBC"},
    #endif

        /* oidKeyWrapType */
    #ifdef WOLFSSL_AES_128
        { AES128_WRAP, AES128_WRAP, oidKeyWrapType, "AES-128 wrap", "aes128-wrap"},
    #endif
    #ifdef WOLFSSL_AES_192
        { AES192_WRAP, AES192_WRAP, oidKeyWrapType, "AES-192 wrap", "aes192-wrap"},
    #endif
    #ifdef WOLFSSL_AES_256
        { AES256_WRAP, AES256_WRAP, oidKeyWrapType, "AES-256 wrap", "aes256-wrap"},
    #endif

    #ifndef NO_PKCS7
        #ifndef NO_DH
        /* oidCmsKeyAgreeType */
            #ifndef NO_SHA
        { dhSinglePass_stdDH_sha1kdf_scheme, dhSinglePass_stdDH_sha1kdf_scheme,
                oidCmsKeyAgreeType, "dhSinglePass-stdDH-sha1kdf-scheme", "dhSinglePass-stdDH-sha1kdf-scheme"},
            #endif
            #ifdef WOLFSSL_SHA224
        { dhSinglePass_stdDH_sha224kdf_scheme,
                dhSinglePass_stdDH_sha224kdf_scheme, oidCmsKeyAgreeType,
                "dhSinglePass-stdDH-sha224kdf-scheme", "dhSinglePass-stdDH-sha224kdf-scheme"},
            #endif
            #ifndef NO_SHA256
        { dhSinglePass_stdDH_sha256kdf_scheme,
                        dhSinglePass_stdDH_sha256kdf_scheme, oidCmsKeyAgreeType,
                        "dhSinglePass-stdDH-sha256kdf-scheme", "dhSinglePass-stdDH-sha256kdf-scheme"},
            #endif
            #ifdef WOLFSSL_SHA384
        { dhSinglePass_stdDH_sha384kdf_scheme,
                        dhSinglePass_stdDH_sha384kdf_scheme, oidCmsKeyAgreeType,
                        "dhSinglePass-stdDH-sha384kdf-scheme", "dhSinglePass-stdDH-sha384kdf-scheme"},
            #endif
            #ifdef WOLFSSL_SHA512
        { dhSinglePass_stdDH_sha512kdf_scheme,
                        dhSinglePass_stdDH_sha512kdf_scheme, oidCmsKeyAgreeType,
                        "dhSinglePass-stdDH-sha512kdf-scheme", "dhSinglePass-stdDH-sha512kdf-scheme"},
            #endif
        #endif
    #endif
    #if defined(WOLFSSL_APACHE_HTTPD)
        /* "1.3.6.1.5.5.7.8.7" */
        { NID_id_on_dnsSRV, NID_id_on_dnsSRV, oidCertNameType,
            WOLFSSL_SN_DNS_SRV, WOLFSSL_LN_DNS_SRV },

        /* "1.3.6.1.4.1.311.20.2.3" */
        { NID_ms_upn, WOLFSSL_MS_UPN_SUM, oidCertExtType, WOLFSSL_SN_MS_UPN,
            WOLFSSL_LN_MS_UPN },

        /* "1.3.6.1.5.5.7.1.24" */
        { NID_tlsfeature, WOLFSSL_TLS_FEATURE_SUM, oidTlsExtType,
            WOLFSSL_SN_TLS_FEATURE, WOLFSSL_LN_TLS_FEATURE },
    #endif
#endif /* OPENSSL_EXTRA */
};

#define WOLFSSL_OBJECT_INFO_SZ \
                (sizeof(wolfssl_object_info) / sizeof(*wolfssl_object_info))
const size_t wolfssl_object_info_sz = WOLFSSL_OBJECT_INFO_SZ;
#endif
#if defined(OPENSSL_EXTRA) && \
    !defined(NO_RSA) && !defined(HAVE_USER_RSA) && !defined(HAVE_FAST_RSA)
WC_RNG* WOLFSSL_RSA_GetRNG(WOLFSSL_RSA *rsa, WC_RNG **tmpRNG, int *initTmpRng)
{
    WC_RNG* rng = NULL;

    if (!rsa || !initTmpRng) {
        return NULL;
    }
    *initTmpRng = 0;

#if !defined(HAVE_FIPS) && !defined(HAVE_USER_RSA) && \
    !defined(HAVE_FAST_RSA) && defined(WC_RSA_BLINDING)
    rng = ((RsaKey*)rsa->internal)->rng;
#endif
    if (tmpRNG != NULL
    #if !defined(HAVE_FIPS) && !defined(HAVE_USER_RSA) && \
        !defined(HAVE_FAST_RSA) && defined(WC_RSA_BLINDING)
        && rng == NULL
    #endif
        ) {
        if (*tmpRNG == NULL) {
#ifdef WOLFSSL_SMALL_STACK
            *tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_TMP_BUFFER);
            if (*tmpRNG == NULL)
                return NULL;
#else
            WOLFSSL_MSG("*tmpRNG is null");
            return NULL;
#endif
        }

        if (wc_InitRng(*tmpRNG) == 0) {
            rng = *tmpRNG;
            *initTmpRng = 1;
        }
        else {
            WOLFSSL_MSG("Bad RNG Init, trying global");
            if (initGlobalRNG == 0)
                WOLFSSL_MSG("Global RNG no Init");
            else
                rng = &globalRNG;
#ifdef WOLFSSL_SMALL_STACK
            if (*tmpRNG)
                XFREE(*tmpRNG, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            *tmpRNG = NULL;
#endif
        }
    }
    return rng;
}
#endif

#ifdef OPENSSL_EXTRA

/* Checks if the global RNG has been created. If not then one is created.
 *
 * Returns WOLFSSL_SUCCESS when no error is encountered.
 */
static int wolfSSL_RAND_Init(void)
{
    int ret = WOLFSSL_FAILURE;
#ifdef HAVE_GLOBAL_RNG
    if (wc_LockMutex(&globalRNGMutex) == 0) {
        if (initGlobalRNG == 0) {
            ret = wc_InitRng(&globalRNG);
            if (ret == 0) {
                initGlobalRNG = 1;
                ret = WOLFSSL_SUCCESS;
            }
        }
        wc_UnLockMutex(&globalRNGMutex);
    }
#endif
    return ret;
}


/* WOLFSSL_SUCCESS on ok */
int wolfSSL_RAND_seed(const void* seed, int len)
{
#ifndef WOLFSSL_NO_OPENSSL_RAND_CB
    if (wolfSSL_RAND_InitMutex() == 0 && wc_LockMutex(&gRandMethodMutex) == 0) {
        if (gRandMethods && gRandMethods->seed) {
            int ret = gRandMethods->seed(seed, len);
            wc_UnLockMutex(&gRandMethodMutex);
            return ret;
        }
        wc_UnLockMutex(&gRandMethodMutex);
    }
#else
    (void)seed;
    (void)len;
#endif

    /* Make sure global shared RNG (globalRNG) is initialized */
    return wolfSSL_RAND_Init();
}


/* Returns the path for reading seed data from.
 * Uses the env variable $RANDFILE first if set, if not then used $HOME/.rnd
 *
 * Note uses stdlib by default unless XGETENV macro is overwritten
 *
 * fname buffer to hold path
 * len   length of fname buffer
 *
 * Returns a pointer to fname on success and NULL on failure
 */
const char* wolfSSL_RAND_file_name(char* fname, unsigned long len)
{
#ifndef NO_FILESYSTEM
    char* rt;
    char ap[] = "/.rnd";

    WOLFSSL_ENTER("wolfSSL_RAND_file_name");

    if (fname == NULL) {
        return NULL;
    }

    XMEMSET(fname, 0, len);
    /* if access to stdlib.h */
    if ((rt = XGETENV("RANDFILE")) != NULL) {
        if (len > XSTRLEN(rt)) {
            XMEMCPY(fname, rt, XSTRLEN(rt));
        }
        else {
            WOLFSSL_MSG("RANDFILE too large for buffer");
            rt = NULL;
        }
    }

    /* $RANDFILE was not set or is too large, check $HOME */
    if (rt == NULL) {
        WOLFSSL_MSG("Environment variable RANDFILE not set");
        if ((rt = XGETENV("HOME")) == NULL) {
            WOLFSSL_MSG("Environment variable HOME not set");
            return NULL;
        }

        if (len > XSTRLEN(rt) +  XSTRLEN(ap)) {
            fname[0] = '\0';
            XSTRNCAT(fname, rt, len);
            XSTRNCAT(fname, ap, len - XSTRLEN(rt));
            return fname;
        }
        else {
            WOLFSSL_MSG("HOME too large for buffer");
            return NULL;
        }
    }

    return fname;
#else
    /* no filesystem defined */
    WOLFSSL_ENTER("wolfSSL_RAND_file_name");
    WOLFSSL_MSG("No filesystem feature enabled, not compiled in");
    (void)fname;
    (void)len;
    return NULL;
#endif
}


/* Writes 1024 bytes from the RNG to the given file name.
 *
 * fname name of file to write to
 *
 * Returns the number of bytes written
 */
int wolfSSL_RAND_write_file(const char* fname)
{
    int bytes = 0;

    WOLFSSL_ENTER("RAND_write_file");

    if (fname == NULL) {
        return SSL_FAILURE;
    }

#ifndef NO_FILESYSTEM
    {
    #ifndef WOLFSSL_SMALL_STACK
        unsigned char buf[1024];
    #else
        unsigned char* buf = (unsigned char *)XMALLOC(1024, NULL,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
        if (buf == NULL) {
            WOLFSSL_MSG("malloc failed");
            return SSL_FAILURE;
        }
    #endif
        bytes = 1024; /* default size of buf */

        if (initGlobalRNG == 0 && wolfSSL_RAND_Init() != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("No RNG to use");
        #ifdef WOLFSSL_SMALL_STACK
            XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        #endif
            return 0;
        }

        if (wc_RNG_GenerateBlock(&globalRNG, buf, bytes) != 0) {
            WOLFSSL_MSG("Error generating random buffer");
            bytes = 0;
        }
        else {
            XFILE f;

            f = XFOPEN(fname, "wb");
            if (f == XBADFILE) {
                WOLFSSL_MSG("Error opening the file");
                bytes = 0;
            }
            else {
                XFWRITE(buf, 1, bytes, f);
                XFCLOSE(f);
            }
        }
        ForceZero(buf, bytes);
    #ifdef WOLFSSL_SMALL_STACK
        XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    #endif
    }
#endif

    return bytes;
}

#ifndef FREERTOS_TCP

/* These constant values are protocol values made by egd */
#if defined(USE_WOLFSSL_IO) && !defined(USE_WINDOWS_API)
    #define WOLFSSL_EGD_NBLOCK 0x01
    #include <sys/un.h>
#endif

/* This collects entropy from the path nm and seeds the global PRNG with it.
 *
 * nm is the file path to the egd server
 *
 * Returns the number of bytes read.
 */
int wolfSSL_RAND_egd(const char* nm)
{
#if defined(USE_WOLFSSL_IO) && !defined(USE_WINDOWS_API) && !defined(HAVE_FIPS) && \
    defined(HAVE_HASHDRBG)
    struct sockaddr_un rem;
    int fd;
    int ret = WOLFSSL_SUCCESS;
    word32 bytes = 0;
    word32 idx   = 0;
#ifndef WOLFSSL_SMALL_STACK
    unsigned char buf[256];
#else
    unsigned char* buf;
    buf = (unsigned char*)XMALLOC(256, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (buf == NULL) {
        WOLFSSL_MSG("Not enough memory");
        return WOLFSSL_FATAL_ERROR;
    }
#endif

    XMEMSET(&rem, 0, sizeof(struct sockaddr_un));
    if (nm == NULL) {
    #ifdef WOLFSSL_SMALL_STACK
        XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    #endif
        return WOLFSSL_FATAL_ERROR;
    }

    fd = socket(AF_UNIX, SOCK_STREAM, 0);
    if (fd < 0) {
        WOLFSSL_MSG("Error creating socket");
    #ifdef WOLFSSL_SMALL_STACK
        XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    #endif
        return WOLFSSL_FATAL_ERROR;
    }
    rem.sun_family = AF_UNIX;
    XSTRNCPY(rem.sun_path, nm, sizeof(rem.sun_path) - 1);
    rem.sun_path[sizeof(rem.sun_path)-1] = '\0';

    /* connect to egd server */
    if (connect(fd, (struct sockaddr*)&rem, sizeof(struct sockaddr_un)) == -1) {
        WOLFSSL_MSG("error connecting to egd server");
        ret = WOLFSSL_FATAL_ERROR;
    }

    while (ret == WOLFSSL_SUCCESS && bytes < 255 && idx + 2 < 256) {
        buf[idx]     = WOLFSSL_EGD_NBLOCK;
        buf[idx + 1] = 255 - bytes; /* request 255 bytes from server */
        ret = (int)write(fd, buf + idx, 2);
        if (ret != 2) {
            if (errno == EAGAIN) {
                ret = WOLFSSL_SUCCESS;
                continue;
            }
            WOLFSSL_MSG("error requesting entropy from egd server");
            ret = WOLFSSL_FATAL_ERROR;
            break;
        }

        /* attempting to read */
        buf[idx] = 0;
        ret = (int)read(fd, buf + idx, 256 - bytes);
        if (ret == 0) {
            WOLFSSL_MSG("error reading entropy from egd server");
            ret = WOLFSSL_FATAL_ERROR;
            break;
        }
        if (ret > 0 && buf[idx] > 0) {
            bytes += buf[idx]; /* egd stores amount sent in first byte */
            if (bytes + idx > 255 || buf[idx] > ret) {
                WOLFSSL_MSG("Buffer error");
                ret = WOLFSSL_FATAL_ERROR;
                break;
            }
            XMEMMOVE(buf + idx, buf + idx + 1, buf[idx]);
            idx = bytes;
            ret = WOLFSSL_SUCCESS;
            if (bytes >= 255) {
                break;
            }
        }
        else {
            if (errno == EAGAIN || errno == EINTR) {
                WOLFSSL_MSG("EGD would read");
                ret = WOLFSSL_SUCCESS; /* try again */
            }
            else if (buf[idx] == 0) {
                /* if egd returned 0 then there is no more entropy to be had.
                   Do not try more reads. */
                ret = WOLFSSL_SUCCESS;
                break;
            }
            else {
                WOLFSSL_MSG("Error with read");
                ret = WOLFSSL_FATAL_ERROR;
            }
        }
    }

    if (bytes > 0 && ret == WOLFSSL_SUCCESS) {
        /* call to check global RNG is created */
        if (wolfSSL_RAND_Init() != SSL_SUCCESS) {
            WOLFSSL_MSG("Error with initializing global RNG structure");
            ret = WOLFSSL_FATAL_ERROR;
        }
        else if (wc_RNG_DRBG_Reseed(&globalRNG, (const byte*) buf, bytes)
                != 0) {
            WOLFSSL_MSG("Error with reseeding DRBG structure");
            ret = WOLFSSL_FATAL_ERROR;
        }
        #ifdef SHOW_SECRETS
        else { /* print out entropy found only when no error occured */
            word32 i;
            printf("EGD Entropy = ");
            for (i = 0; i < bytes; i++) {
                printf("%02X", buf[i]);
            }
            printf("\n");
        }
        #endif
    }

    ForceZero(buf, bytes);
    #ifdef WOLFSSL_SMALL_STACK
    XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    #endif
    close(fd);

    if (ret == WOLFSSL_SUCCESS) {
        return bytes;
    }
    else {
        return ret;
    }
#else
    WOLFSSL_MSG("Type of socket needed is not available");
    WOLFSSL_MSG("\tor using mode where DRBG API is not available");
    (void)nm;

    return WOLFSSL_FATAL_ERROR;
#endif /* USE_WOLFSSL_IO && !USE_WINDOWS_API && !HAVE_FIPS && HAVE_HASHDRBG */
}

#endif /* !FREERTOS_TCP */

void wolfSSL_RAND_Cleanup(void)
{
#ifndef WOLFSSL_NO_OPENSSL_RAND_CB
    if (wolfSSL_RAND_InitMutex() == 0 && wc_LockMutex(&gRandMethodMutex) == 0) {
        if (gRandMethods && gRandMethods->cleanup)
            gRandMethods->cleanup();
        wc_UnLockMutex(&gRandMethodMutex);
    }

    if (wc_FreeMutex(&gRandMethodMutex) == 0)
        gRandMethodsInit = 0;
#endif
#ifdef HAVE_GLOBAL_RNG
    if (wc_LockMutex(&globalRNGMutex) == 0) {
        if (initGlobalRNG) {
            wc_FreeRng(&globalRNG);
            initGlobalRNG = 0;
        }
        wc_UnLockMutex(&globalRNGMutex);
    }
#endif
}

/* returns WOLFSSL_SUCCESS if the bytes generated are valid otherwise WOLFSSL_FAILURE */
int wolfSSL_RAND_pseudo_bytes(unsigned char* buf, int num)
{
#ifndef WOLFSSL_NO_OPENSSL_RAND_CB
    if (wolfSSL_RAND_InitMutex() == 0 && wc_LockMutex(&gRandMethodMutex) == 0) {
        if (gRandMethods && gRandMethods->pseudorand) {
            int ret = gRandMethods->pseudorand(buf, num);
            wc_UnLockMutex(&gRandMethodMutex);
            return ret;
        }
        wc_UnLockMutex(&gRandMethodMutex);
    }
#endif

    /* fallback to using the global shared RNG */
    return wolfSSL_RAND_bytes(buf, num);
}

/* returns WOLFSSL_SUCCESS if the bytes generated are valid otherwise WOLFSSL_FAILURE */
int wolfSSL_RAND_bytes(unsigned char* buf, int num)
{
    int     ret = 0;
    WC_RNG* rng = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG* tmpRNG = NULL;
#else
    WC_RNG  tmpRNG[1];
#endif
    int initTmpRng = 0;
    int blockCount = 0;
#ifdef HAVE_GLOBAL_RNG
    int used_global = 0;
#endif

    WOLFSSL_ENTER("wolfSSL_RAND_bytes");
    /* sanity check */
    if (buf == NULL || num < 0)
        /* return code compliant with OpenSSL */
        return 0;
        
    /* if a RAND callback has been set try and use it */
#ifndef WOLFSSL_NO_OPENSSL_RAND_CB
    if (wolfSSL_RAND_InitMutex() == 0 && wc_LockMutex(&gRandMethodMutex) == 0) {
        if (gRandMethods && gRandMethods->bytes) {
            ret = gRandMethods->bytes(buf, num);
            wc_UnLockMutex(&gRandMethodMutex);
            return ret;
        }
        wc_UnLockMutex(&gRandMethodMutex);
    }
#endif
#ifdef HAVE_GLOBAL_RNG
    if (initGlobalRNG) {
        if (wc_LockMutex(&globalRNGMutex) != 0) {
            WOLFSSL_MSG("Bad Lock Mutex rng");
            return ret;
        }

        rng = &globalRNG;
        used_global = 1;
    }
    else
#endif
    {
    #ifdef WOLFSSL_SMALL_STACK
        tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
        if (tmpRNG == NULL)
            return ret;
    #endif
        if (wc_InitRng(tmpRNG) == 0) {
            rng = tmpRNG;
            initTmpRng = 1;
        }
    }
    if (rng) {
        /* handles size greater than RNG_MAX_BLOCK_LEN */
        blockCount = num / RNG_MAX_BLOCK_LEN;

        while (blockCount--) {
            ret = wc_RNG_GenerateBlock(rng, buf, RNG_MAX_BLOCK_LEN);
            if (ret != 0) {
                WOLFSSL_MSG("Bad wc_RNG_GenerateBlock");
                break;
            }
            num -= RNG_MAX_BLOCK_LEN;
            buf += RNG_MAX_BLOCK_LEN;
        }

        if (ret == 0 && num)
            ret = wc_RNG_GenerateBlock(rng, buf, num);

        if (ret != 0)
            WOLFSSL_MSG("Bad wc_RNG_GenerateBlock");
        else
            ret = WOLFSSL_SUCCESS;
    }

#ifdef HAVE_GLOBAL_RNG
    if (used_global == 1)
        wc_UnLockMutex(&globalRNGMutex);
#endif
    if (initTmpRng)
        wc_FreeRng(tmpRNG);
#ifdef WOLFSSL_SMALL_STACK
    if (tmpRNG)
        XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif

    return ret;
}


int wolfSSL_RAND_poll(void)
{
    byte  entropy[16];
    int  ret = 0;
    word32 entropy_sz = 16;

    WOLFSSL_ENTER("wolfSSL_RAND_poll");
    if (initGlobalRNG == 0){
        WOLFSSL_MSG("Global RNG no Init");
        return  WOLFSSL_FAILURE;
    }
    ret = wc_GenerateSeed(&globalRNG.seed, entropy, entropy_sz);
    if (ret != 0){
        WOLFSSL_MSG("Bad wc_RNG_GenerateBlock");
        ret = WOLFSSL_FAILURE;
    }else
        ret = WOLFSSL_SUCCESS;

    return ret;
}
#endif /* OPENSSL_EXTRA */



#ifdef OPENSSL_EXTRA

WOLFSSL_ASN1_INTEGER* wolfSSL_BN_to_ASN1_INTEGER(const WOLFSSL_BIGNUM *bn, WOLFSSL_ASN1_INTEGER *ai)
{
    WOLFSSL_ASN1_INTEGER* a;
    int len;
    const int extraTagSz = MAX_LENGTH_SZ + 1;
    byte intTag[MAX_LENGTH_SZ + 1];
    int idx = 0;
    WOLFSSL_ENTER("wolfSSL_BN_to_ASN1_INTEGER");

    if (ai == NULL) {
        a = wolfSSL_ASN1_INTEGER_new();

        if (a == NULL)
            return NULL;

        a->type = V_ASN1_INTEGER;
    }
    else {
        a = ai;
    }
    if (a) {
        if (wolfSSL_BN_is_negative(bn) && !wolfSSL_BN_is_zero(bn)) {
            a->type |= V_ASN1_NEG_INTEGER;
            a->negative = 1;
        }

        len = wolfSSL_BN_num_bytes(bn);
        if (len == 0)
            len = 1;

        /* allocate buffer */
        if (len + extraTagSz > (int)sizeof(a->intData)) {
            /* create new data buffer and copy over */
            a->data = (byte*)XMALLOC(len + extraTagSz, NULL,
                    DYNAMIC_TYPE_OPENSSL);
            if (a->data == NULL) {
                if (a != ai)
                    wolfSSL_ASN1_INTEGER_free(a);
                return NULL;
            }
            a->isDynamic = 1;
        }
        else {
            XMEMSET(a->intData, 0, sizeof(a->intData));
            a->data = a->intData;
        }

        /* populate data */
        if (wolfSSL_BN_is_zero(bn)) {
            a->data[0] = 0;
        }
        else {
            len = wolfSSL_BN_bn2bin(bn, a->data);
            if (len < 0) {
                wolfSSL_ASN1_INTEGER_free(a);
                return NULL;
            }
        }
        a->length = len;

        /* Write ASN tag */
        idx = SetASNInt(a->length, a->data[0], intTag);
        XMEMMOVE(a->data + idx, a->data, a->length);
        XMEMCPY(a->data, intTag, idx);
        a->dataMax = a->length += idx;
    }

    return a;
}

#ifdef OPENSSL_ALL
void *wolfSSL_ASN1_item_new(const WOLFSSL_ASN1_ITEM *tpl)
{
    void *ret = NULL;
    const WOLFSSL_ASN1_TEMPLATE *member = NULL;
    size_t i;
    WOLFSSL_ENTER("wolfSSL_ASN1_item_new");
    if (!tpl) {
        return NULL;
    }
    if (!(ret = (void *)XMALLOC(tpl->size, NULL, DYNAMIC_TYPE_OPENSSL))) {
        return NULL;
    }
    XMEMSET(ret, 0, tpl->size);
    for (member = tpl->members, i = 0; i < tpl->mcount;
            member++, i++) {
        switch (member->type) {
            case WOLFSSL_X509_ALGOR_ASN1:
            {
                WOLFSSL_X509_ALGOR* algor = wolfSSL_X509_ALGOR_new();
                if (!algor) {
                    goto error;
                }
                *(WOLFSSL_X509_ALGOR**)(((byte*)ret) + member->offset) = algor;
                break;
            }
            case WOLFSSL_ASN1_BIT_STRING_ASN1:
            {
                WOLFSSL_ASN1_BIT_STRING* bit_str = wolfSSL_ASN1_BIT_STRING_new();
                if (!bit_str) {
                    goto error;
                }
                *(WOLFSSL_ASN1_BIT_STRING**)(((byte*)ret) + member->offset) = bit_str;
                break;
            }
            default:
                WOLFSSL_MSG("Type not supported in wolfSSL_ASN1_item_new");
                goto error;
        }
    }
    return ret;
error:
    wolfSSL_ASN1_item_free(ret, tpl);
    return NULL;
}

void wolfSSL_ASN1_item_free(void *val, const WOLFSSL_ASN1_ITEM *tpl)
{
    const WOLFSSL_ASN1_TEMPLATE *member = NULL;
    size_t i;
    WOLFSSL_ENTER("wolfSSL_ASN1_item_free");
    if (val) {
        for (member = tpl->members, i = 0; i < tpl->mcount;
                member++, i++) {
            switch (member->type) {
                case WOLFSSL_X509_ALGOR_ASN1:
                {
                    WOLFSSL_X509_ALGOR* algor = *(WOLFSSL_X509_ALGOR**)
                                                 (((byte*)val) + member->offset);
                    if (algor) {
                        wolfSSL_X509_ALGOR_free(algor);
                    }
                    break;
                }
                case WOLFSSL_ASN1_BIT_STRING_ASN1:
                {
                    WOLFSSL_ASN1_BIT_STRING* bit_str = *(WOLFSSL_ASN1_BIT_STRING**)
                                                        (((byte*)val) + member->offset);
                    if (bit_str) {
                        wolfSSL_ASN1_BIT_STRING_free(bit_str);
                    }
                    break;
                }
                default:
                    WOLFSSL_MSG("Type not supported in wolfSSL_ASN1_item_free");
            }
        }
        XFREE(val, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}

#define bufLenOrNull(buf, len) (buf ? buf + len : NULL)

static int i2dProcessMembers(const void *src, byte *buf,
                          const WOLFSSL_ASN1_TEMPLATE *members, size_t mcount)
{
    const WOLFSSL_ASN1_TEMPLATE *member = NULL;
    int len = 0, ret;
    size_t i;
    WOLFSSL_ENTER("processMembers");
    for (member = members, i = 0; i < mcount; member++, i++) {
        switch (member->type) {
            case WOLFSSL_X509_ALGOR_ASN1:
            {
                word32 oid = 0;
                word32 idx = 0;
                const WOLFSSL_X509_ALGOR* algor = *(const WOLFSSL_X509_ALGOR**)
                                                   (((byte*)src) + member->offset);
                if (!algor->algorithm) {
                    WOLFSSL_LEAVE("processMembers", WOLFSSL_FAILURE);
                    return WOLFSSL_FAILURE;
                }

                if (GetObjectId(algor->algorithm->obj, &idx, &oid,
                        algor->algorithm->grp, algor->algorithm->objSz) < 0) {
                    WOLFSSL_MSG("Issue getting OID of object");
                    return -1;
                }

                ret = SetAlgoID(oid, bufLenOrNull(buf, len),
                                algor->algorithm->grp, 0);
                if (!ret) {
                    return WOLFSSL_FAILURE;
                }
                len += ret;
                break;
            }
            case WOLFSSL_ASN1_BIT_STRING_ASN1:
            {
                const WOLFSSL_ASN1_BIT_STRING* bit_str;
                bit_str = *(const WOLFSSL_ASN1_BIT_STRING**)
                           (((byte*)src) + member->offset);
                len += SetBitString(bit_str->length, 0, bufLenOrNull(buf, len));
                if (buf && bit_str->data) {
                    XMEMCPY(buf + len, bit_str->data, bit_str->length);
                }
                len += bit_str->length;
                break;
            }
            default:
                WOLFSSL_MSG("Type not support in processMembers");
                WOLFSSL_LEAVE("processMembers", WOLFSSL_FAILURE);
                return WOLFSSL_FAILURE;
        }
    }
    WOLFSSL_LEAVE("processMembers", len);
    return len;
}

int wolfSSL_ASN1_item_i2d(const void *src, byte **dest,
                          const WOLFSSL_ASN1_ITEM *tpl)
{
    int len = 0;
    byte *buf = NULL;

    WOLFSSL_ENTER("wolfSSL_ASN1_item_i2d");

    if (!src || !tpl) {
        WOLFSSL_LEAVE("wolfSSL_ASN1_item_i2d", WOLFSSL_FAILURE);
        return WOLFSSL_FAILURE;
    }

    if (dest && !*dest) {
        len = wolfSSL_ASN1_item_i2d(src, NULL, tpl);
        if (!len) {
            goto error;
        }
        buf = (byte*)XMALLOC(len, NULL, DYNAMIC_TYPE_ASN1);
        if (!buf) {
            goto error;
        }
        len = 0;
    }

    switch (tpl->type) {
        case ASN_SEQUENCE:
        {
            int seq_len = i2dProcessMembers(src, NULL, tpl->members,
                                         tpl->mcount);
            if (!seq_len) {
                goto error;
            }
            len += SetSequence(seq_len, bufLenOrNull(buf, len));
            if (buf &&
                    i2dProcessMembers(src, bufLenOrNull(buf, len), tpl->members,
                                   tpl->mcount) != seq_len) {
                WOLFSSL_MSG("Inconsistent sequence length");
                goto error;
            }
            len += seq_len;
            break;
        }
        default:
            WOLFSSL_MSG("Type not supported in wolfSSL_ASN1_item_i2d");
            goto error;
    }

    if (dest && !*dest) {
        *dest = buf;
    }
    else if (dest && *dest && buf) {
        /* *dest length is not checked because the user is responsible
         * for providing a long enough buffer */
        XMEMCPY(*dest, buf, len);
    }

    WOLFSSL_LEAVE("wolfSSL_ASN1_item_i2d", len);
    return len;
error:
    if (buf) {
        XFREE(buf, NULL, DYNAMIC_TYPE_ASN1);
    }
    WOLFSSL_LEAVE("wolfSSL_ASN1_item_i2d", WOLFSSL_FAILURE);
    return WOLFSSL_FAILURE;
}
#endif /* OPENSSL_ALL */

#ifndef NO_DH

static void InitwolfSSL_DH(WOLFSSL_DH* dh)
{
    if (dh) {
        XMEMSET(dh, 0, sizeof(WOLFSSL_DH));
    }
}


WOLFSSL_DH* wolfSSL_DH_new(void)
{
    WOLFSSL_DH* external;
    DhKey*     key;

    WOLFSSL_ENTER("wolfSSL_DH_new");

    key = (DhKey*) XMALLOC(sizeof(DhKey), NULL, DYNAMIC_TYPE_DH);
    if (key == NULL) {
        WOLFSSL_MSG("wolfSSL_DH_new malloc DhKey failure");
        return NULL;
    }

    external = (WOLFSSL_DH*) XMALLOC(sizeof(WOLFSSL_DH), NULL,
                                    DYNAMIC_TYPE_DH);
    if (external == NULL) {
        WOLFSSL_MSG("wolfSSL_DH_new malloc WOLFSSL_DH failure");
        XFREE(key, NULL, DYNAMIC_TYPE_DH);
        return NULL;
    }

    InitwolfSSL_DH(external);
    if (wc_InitDhKey(key) != 0) {
        WOLFSSL_MSG("wolfSSL_DH_new InitDhKey failure");
        XFREE(key, NULL, DYNAMIC_TYPE_DH);
        XFREE(external, NULL, DYNAMIC_TYPE_DH);
        return NULL;
    }
    external->internal = key;
    external->priv_key = wolfSSL_BN_new();
    external->pub_key = wolfSSL_BN_new();

    return external;
}

void wolfSSL_DH_free(WOLFSSL_DH* dh)
{
    WOLFSSL_ENTER("wolfSSL_DH_free");

    if (dh) {
        if (dh->internal) {
            wc_FreeDhKey((DhKey*)dh->internal);
            XFREE(dh->internal, NULL, DYNAMIC_TYPE_DH);
            dh->internal = NULL;
        }
        wolfSSL_BN_free(dh->priv_key);
        wolfSSL_BN_free(dh->pub_key);
        wolfSSL_BN_free(dh->g);
        wolfSSL_BN_free(dh->p);
        wolfSSL_BN_free(dh->q);
        InitwolfSSL_DH(dh);  /* set back to NULLs for safety */

        XFREE(dh, NULL, DYNAMIC_TYPE_DH);
    }
}

int SetDhInternal(WOLFSSL_DH* dh)
{
    int            ret = WOLFSSL_FATAL_ERROR;
    int            pSz = 1024;
    int            gSz = 1024;
#ifdef WOLFSSL_DH_EXTRA
    int            privSz = 256; /* Up to 2048-bit */
    int            pubSz  = 256;
#endif
#ifdef WOLFSSL_SMALL_STACK
    unsigned char* p   = NULL;
    unsigned char* g   = NULL;
    #ifdef WOLFSSL_DH_EXTRA
        unsigned char* priv_key = NULL;
        unsigned char* pub_key = NULL;
    #endif
#else
    unsigned char  p[1024];
    unsigned char  g[1024];
    #ifdef WOLFSSL_DH_EXTRA
        unsigned char priv_key[256];
        unsigned char pub_key[256];
    #endif
#endif

    WOLFSSL_ENTER("SetDhInternal");

    if (dh == NULL || dh->p == NULL || dh->g == NULL)
        WOLFSSL_MSG("Bad function arguments");
    else if (wolfSSL_BN_bn2bin(dh->p, NULL) > pSz)
        WOLFSSL_MSG("Bad p internal size");
    else if (wolfSSL_BN_bn2bin(dh->g, NULL) > gSz)
        WOLFSSL_MSG("Bad g internal size");
#ifdef WOLFSSL_DH_EXTRA
    else if (wolfSSL_BN_bn2bin(dh->priv_key, NULL) > privSz)
        WOLFSSL_MSG("Bad private key internal size");
    else if (wolfSSL_BN_bn2bin(dh->pub_key, NULL) > privSz)
        WOLFSSL_MSG("Bad public key internal size");
#endif
    else {
    #ifdef WOLFSSL_SMALL_STACK
        p = (unsigned char*)XMALLOC(pSz, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
        g = (unsigned char*)XMALLOC(gSz, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
        #ifdef WOLFSSL_DH_EXTRA
            priv_key = (unsigned char*)XMALLOC(privSz, NULL, 
                DYNAMIC_TYPE_PRIVATE_KEY);
            pub_key  = (unsigned char*)XMALLOC(pubSz, NULL, 
                DYNAMIC_TYPE_PUBLIC_KEY);
        #endif

        if (p == NULL || g == NULL) {
            XFREE(p, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
            XFREE(g, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
            return ret;
        }
    #endif /* WOLFSSL_SMALL_STACK */

    #ifdef WOLFSSL_DH_EXTRA
        privSz = wolfSSL_BN_bn2bin(dh->priv_key, priv_key);
        pubSz  = wolfSSL_BN_bn2bin(dh->pub_key,  pub_key);
        if (privSz <= 0) {
            WOLFSSL_MSG("No private key size.");
        }
        if (pubSz <= 0) {
            WOLFSSL_MSG("No public key size.");
        }
        if (privSz > 0 || pubSz > 0) {
            ret = wc_DhImportKeyPair((DhKey*)dh->internal, priv_key, privSz,
                                     pub_key, pubSz);
            if (ret == 0) {
                ret = WOLFSSL_SUCCESS;
            }
            else {
                WOLFSSL_MSG("Failed setting private or public key.");
                ret = WOLFSSL_FAILURE;
            }
        }
    #endif /* WOLFSSL_DH_EXTRA */

        pSz = wolfSSL_BN_bn2bin(dh->p, p);
        gSz = wolfSSL_BN_bn2bin(dh->g, g);

        if (pSz <= 0 || gSz <= 0)
            WOLFSSL_MSG("Bad BN2bin set");
        else if (wc_DhSetKey((DhKey*)dh->internal, p, pSz, g, gSz) < 0)
            WOLFSSL_MSG("Bad DH SetKey");
        else {
            dh->inSet = 1;
            ret = WOLFSSL_SUCCESS;
        }

    #ifdef WOLFSSL_SMALL_STACK
        XFREE(p, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
        XFREE(g, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
        #ifdef WOLFSSL_DH_EXTRA
            XFREE(priv_key, NULL, DYNAMIC_TYPE_PRIVATE_KEY);
            XFREE(pub_key,  NULL, DYNAMIC_TYPE_PUBLIC_KEY);
        #endif
    #endif
    }

    return ret;
}

#if !defined(NO_DH) && (defined(WOLFSSL_QT) || defined(OPENSSL_ALL) \
    || defined(WOLFSSL_OPENSSH)) || defined(OPENSSL_EXTRA)

#ifdef WOLFSSL_DH_EXTRA
WOLFSSL_DH* wolfSSL_DH_dup(WOLFSSL_DH* dh)
{
    WOLFSSL_DH* ret = NULL;

    WOLFSSL_ENTER("wolfSSL_DH_dup");

    if (!dh) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    if (dh->inSet == 0 && SetDhInternal(dh) != WOLFSSL_SUCCESS){
        WOLFSSL_MSG("Bad DH set internal");
        return NULL;
    }

    if (!(ret = wolfSSL_DH_new())) {
        WOLFSSL_MSG("wolfSSL_DH_new error");
        return NULL;
    }

    if (wc_DhKeyCopy((DhKey*)dh->internal, (DhKey*)ret->internal) != MP_OKAY) {
        WOLFSSL_MSG("wc_DhKeyCopy error");
        wolfSSL_DH_free(ret);
        return NULL;
    }
    ret->inSet = 1;

    if (SetDhExternal(ret) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetDhExternal error");
        wolfSSL_DH_free(ret);
        return NULL;
    }

    return ret;
}
#endif /* WOLFSSL_DH_EXTRA */

/* Set the members of DhKey into WOLFSSL_DH
 * Specify elements to set via the 2nd parmeter 
 */
int SetDhExternal_ex(WOLFSSL_DH *dh, int elm)
{
    DhKey *key;
    WOLFSSL_MSG("Entering SetDhExternal_ex");

    if (dh == NULL || dh->internal == NULL) {
        WOLFSSL_MSG("dh key NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    key = (DhKey*)dh->internal;

    if (elm & ELEMENT_P) {
        if (SetIndividualExternal(&dh->p, &key->p) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("dh param p error");
            return WOLFSSL_FATAL_ERROR;
        }
    }
    if (elm & ELEMENT_Q) {
        if (SetIndividualExternal(&dh->q, &key->q) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("dh param q error");
            return WOLFSSL_FATAL_ERROR;
        }
    }
    if (elm & ELEMENT_G) {
        if (SetIndividualExternal(&dh->g, &key->g) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("dh param g error");
            return WOLFSSL_FATAL_ERROR;
        }
    }
#ifdef WOLFSSL_DH_EXTRA
    if (elm & ELEMENT_PRV) {
        if (SetIndividualExternal(&dh->priv_key, &key->priv) != 
                                                      WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("No DH Private Key");
            return WOLFSSL_FATAL_ERROR;
        }
    }
    if (elm & ELEMENT_PUB) {
        if (SetIndividualExternal(&dh->pub_key, &key->pub) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("No DH Public Key");
            return WOLFSSL_FATAL_ERROR;
        }
    }
#endif /* WOLFSSL_DH_EXTRA */

    dh->exSet = 1;

    return WOLFSSL_SUCCESS;
}
/* Set the members of DhKey into WOLFSSL_DH
 * DhKey was populated from wc_DhKeyDecode
 * p, g, pub_key and pri_key are set.
 */
int SetDhExternal(WOLFSSL_DH *dh)
{
    int elements = ELEMENT_P | ELEMENT_G | ELEMENT_PUB | ELEMENT_PRV;
    WOLFSSL_MSG("Entering SetDhExternal");
    return SetDhExternal_ex(dh, elements);
}
#endif /* !NO_DH && (WOLFSSL_QT || OPENSSL_ALL) */

/* return code compliant with OpenSSL :
 *   DH prime size in bytes if success, 0 if error
 */
int wolfSSL_DH_size(WOLFSSL_DH* dh)
{
    WOLFSSL_MSG("wolfSSL_DH_size");

    if (dh == NULL)
        return WOLFSSL_FATAL_ERROR;

    return wolfSSL_BN_num_bytes(dh->p);
}

/* This sets a big number with the 768-bit prime from RFC 2409.
 *
 * bn  if not NULL then the big number structure is used. If NULL then a new
 *     big number structure is created.
 *
 * Returns a WOLFSSL_BIGNUM structure on success and NULL with failure.
 */
WOLFSSL_BIGNUM* wolfSSL_DH_768_prime(WOLFSSL_BIGNUM* bn)
{
    const char prm[] = {
        "FFFFFFFFFFFFFFFFC90FDAA22168C234"
        "C4C6628B80DC1CD129024E088A67CC74"
        "020BBEA63B139B22514A08798E3404DD"
        "EF9519B3CD3A431B302B0A6DF25F1437"
        "4FE1356D6D51C245E485B576625E7EC6"
        "F44C42E9A63A3620FFFFFFFFFFFFFFFF"
    };

    WOLFSSL_ENTER("wolfSSL_DH_768_prime");

    if (wolfSSL_BN_hex2bn(&bn, prm) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("Error converting DH 768 prime to big number");
        return NULL;
    }

    return bn;
}

/* This sets a big number with the 1024-bit prime from RFC 2409.
 *
 * bn  if not NULL then the big number structure is used. If NULL then a new
 *     big number structure is created.
 *
 * Returns a WOLFSSL_BIGNUM structure on success and NULL with failure.
 */
WOLFSSL_BIGNUM* wolfSSL_DH_1024_prime(WOLFSSL_BIGNUM* bn)
{
    const char prm[] = {
        "FFFFFFFFFFFFFFFFC90FDAA22168C234"
        "C4C6628B80DC1CD129024E088A67CC74"
        "020BBEA63B139B22514A08798E3404DD"
        "EF9519B3CD3A431B302B0A6DF25F1437"
        "4FE1356D6D51C245E485B576625E7EC6"
        "F44C42E9A637ED6B0BFF5CB6F406B7ED"
        "EE386BFB5A899FA5AE9F24117C4B1FE6"
        "49286651ECE65381FFFFFFFFFFFFFFFF"
    };

    WOLFSSL_ENTER("wolfSSL_DH_1024_prime");

    if (wolfSSL_BN_hex2bn(&bn, prm) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("Error converting DH 1024 prime to big number");
        return NULL;
    }

    return bn;
}

/* This sets a big number with the 1536-bit prime from RFC 3526.
 *
 * bn  if not NULL then the big number structure is used. If NULL then a new
 *     big number structure is created.
 *
 * Returns a WOLFSSL_BIGNUM structure on success and NULL with failure.
 */
WOLFSSL_BIGNUM* wolfSSL_DH_1536_prime(WOLFSSL_BIGNUM* bn)
{
    const char prm[] = {
        "FFFFFFFFFFFFFFFFC90FDAA22168C234"
        "C4C6628B80DC1CD129024E088A67CC74"
        "020BBEA63B139B22514A08798E3404DD"
        "EF9519B3CD3A431B302B0A6DF25F1437"
        "4FE1356D6D51C245E485B576625E7EC6"
        "F44C42E9A637ED6B0BFF5CB6F406B7ED"
        "EE386BFB5A899FA5AE9F24117C4B1FE6"
        "49286651ECE45B3DC2007CB8A163BF05"
        "98DA48361C55D39A69163FA8FD24CF5F"
        "83655D23DCA3AD961C62F356208552BB"
        "9ED529077096966D670C354E4ABC9804"
        "F1746C08CA237327FFFFFFFFFFFFFFFF"
    };

    WOLFSSL_ENTER("wolfSSL_DH_1536_prime");

    if (wolfSSL_BN_hex2bn(&bn, prm) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("Error converting DH 1536 prime to big number");
        return NULL;
    }

    return bn;
}

/* This sets a big number with the 2048-bit prime from RFC 3526.
 *
 * bn  if not NULL then the big number structure is used. If NULL then a new
 *     big number structure is created.
 *
 * Returns a WOLFSSL_BIGNUM structure on success and NULL with failure.
 */
WOLFSSL_BIGNUM* wolfSSL_DH_2048_prime(WOLFSSL_BIGNUM* bn)
{
    const char prm[] = {
        "FFFFFFFFFFFFFFFFC90FDAA22168C234"
        "C4C6628B80DC1CD129024E088A67CC74"
        "020BBEA63B139B22514A08798E3404DD"
        "EF9519B3CD3A431B302B0A6DF25F1437"
        "4FE1356D6D51C245E485B576625E7EC6"
        "F44C42E9A637ED6B0BFF5CB6F406B7ED"
        "EE386BFB5A899FA5AE9F24117C4B1FE6"
        "49286651ECE45B3DC2007CB8A163BF05"
        "98DA48361C55D39A69163FA8FD24CF5F"
        "83655D23DCA3AD961C62F356208552BB"
        "9ED529077096966D670C354E4ABC9804"
        "F1746C08CA18217C32905E462E36CE3B"
        "E39E772C180E86039B2783A2EC07A28F"
        "B5C55DF06F4C52C9DE2BCBF695581718"
        "3995497CEA956AE515D2261898FA0510"
        "15728E5A8AACAA68FFFFFFFFFFFFFFFF"
    };

    WOLFSSL_ENTER("wolfSSL_DH_2048_prime");

    if (wolfSSL_BN_hex2bn(&bn, prm) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("Error converting DH 2048 prime to big number");
        return NULL;
    }

    return bn;
}

/* This sets a big number with the 3072-bit prime from RFC 3526.
 *
 * bn  if not NULL then the big number structure is used. If NULL then a new
 *     big number structure is created.
 *
 * Returns a WOLFSSL_BIGNUM structure on success and NULL with failure.
 */
WOLFSSL_BIGNUM* wolfSSL_DH_3072_prime(WOLFSSL_BIGNUM* bn)
{
    const char prm[] = {
        "FFFFFFFFFFFFFFFFC90FDAA22168C234"
        "C4C6628B80DC1CD129024E088A67CC74"
        "020BBEA63B139B22514A08798E3404DD"
        "EF9519B3CD3A431B302B0A6DF25F1437"
        "4FE1356D6D51C245E485B576625E7EC6"
        "F44C42E9A637ED6B0BFF5CB6F406B7ED"
        "EE386BFB5A899FA5AE9F24117C4B1FE6"
        "49286651ECE45B3DC2007CB8A163BF05"
        "98DA48361C55D39A69163FA8FD24CF5F"
        "83655D23DCA3AD961C62F356208552BB"
        "9ED529077096966D670C354E4ABC9804"
        "F1746C08CA18217C32905E462E36CE3B"
        "E39E772C180E86039B2783A2EC07A28F"
        "B5C55DF06F4C52C9DE2BCBF695581718"
        "3995497CEA956AE515D2261898FA0510"
        "15728E5A8AAAC42DAD33170D04507A33"
        "A85521ABDF1CBA64ECFB850458DBEF0A"
        "8AEA71575D060C7DB3970F85A6E1E4C7"
        "ABF5AE8CDB0933D71E8C94E04A25619D"
        "CEE3D2261AD2EE6BF12FFA06D98A0864"
        "D87602733EC86A64521F2B18177B200C"
        "BBE117577A615D6C770988C0BAD946E2"
        "08E24FA074E5AB3143DB5BFCE0FD108E"
        "4B82D120A93AD2CAFFFFFFFFFFFFFFFF"
    };

    WOLFSSL_ENTER("wolfSSL_DH_3072_prime");

    if (wolfSSL_BN_hex2bn(&bn, prm) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("Error converting DH 3072 prime to big number");
        return NULL;
    }

    return bn;
}

/* This sets a big number with the 4096-bit prime from RFC 3526.
 *
 * bn  if not NULL then the big number structure is used. If NULL then a new
 *     big number structure is created.
 *
 * Returns a WOLFSSL_BIGNUM structure on success and NULL with failure.
 */
WOLFSSL_BIGNUM* wolfSSL_DH_4096_prime(WOLFSSL_BIGNUM* bn)
{
    const char prm[] = {
        "FFFFFFFFFFFFFFFFC90FDAA22168C234"
        "C4C6628B80DC1CD129024E088A67CC74"
        "020BBEA63B139B22514A08798E3404DD"
        "EF9519B3CD3A431B302B0A6DF25F1437"
        "4FE1356D6D51C245E485B576625E7EC6"
        "F44C42E9A637ED6B0BFF5CB6F406B7ED"
        "EE386BFB5A899FA5AE9F24117C4B1FE6"
        "49286651ECE45B3DC2007CB8A163BF05"
        "98DA48361C55D39A69163FA8FD24CF5F"
        "83655D23DCA3AD961C62F356208552BB"
        "9ED529077096966D670C354E4ABC9804"
        "F1746C08CA18217C32905E462E36CE3B"
        "E39E772C180E86039B2783A2EC07A28F"
        "B5C55DF06F4C52C9DE2BCBF695581718"
        "3995497CEA956AE515D2261898FA0510"
        "15728E5A8AAAC42DAD33170D04507A33"
        "A85521ABDF1CBA64ECFB850458DBEF0A"
        "8AEA71575D060C7DB3970F85A6E1E4C7"
        "ABF5AE8CDB0933D71E8C94E04A25619D"
        "CEE3D2261AD2EE6BF12FFA06D98A0864"
        "D87602733EC86A64521F2B18177B200C"
        "BBE117577A615D6C770988C0BAD946E2"
        "08E24FA074E5AB3143DB5BFCE0FD108E"
        "4B82D120A92108011A723C12A787E6D7"
        "88719A10BDBA5B2699C327186AF4E23C"
        "1A946834B6150BDA2583E9CA2AD44CE8"
        "DBBBC2DB04DE8EF92E8EFC141FBECAA6"
        "287C59474E6BC05D99B2964FA090C3A2"
        "233BA186515BE7ED1F612970CEE2D7AF"
        "B81BDD762170481CD0069127D5B05AA9"
        "93B4EA988D8FDDC186FFB7DC90A6C08F"
        "4DF435C934063199FFFFFFFFFFFFFFFF"
    };

    WOLFSSL_ENTER("wolfSSL_DH_4096_prime");

    if (wolfSSL_BN_hex2bn(&bn, prm) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("Error converting DH 4096 prime to big number");
        return NULL;
    }

    return bn;
}

/* This sets a big number with the 6144-bit prime from RFC 3526.
 *
 * bn  if not NULL then the big number structure is used. If NULL then a new
 *     big number structure is created.
 *
 * Returns a WOLFSSL_BIGNUM structure on success and NULL with failure.
 */
WOLFSSL_BIGNUM* wolfSSL_DH_6144_prime(WOLFSSL_BIGNUM* bn)
{
    const char prm[] = {
        "FFFFFFFFFFFFFFFFC90FDAA22168C234"
        "C4C6628B80DC1CD129024E088A67CC74"
        "020BBEA63B139B22514A08798E3404DD"
        "EF9519B3CD3A431B302B0A6DF25F1437"
        "4FE1356D6D51C245E485B576625E7EC6"
        "F44C42E9A637ED6B0BFF5CB6F406B7ED"
        "EE386BFB5A899FA5AE9F24117C4B1FE6"
        "49286651ECE45B3DC2007CB8A163BF05"
        "98DA48361C55D39A69163FA8FD24CF5F"
        "83655D23DCA3AD961C62F356208552BB"
        "9ED529077096966D670C354E4ABC9804"
        "F1746C08CA18217C32905E462E36CE3B"
        "E39E772C180E86039B2783A2EC07A28F"
        "B5C55DF06F4C52C9DE2BCBF695581718"
        "3995497CEA956AE515D2261898FA0510"
        "15728E5A8AAAC42DAD33170D04507A33"
        "A85521ABDF1CBA64ECFB850458DBEF0A"
        "8AEA71575D060C7DB3970F85A6E1E4C7"
        "ABF5AE8CDB0933D71E8C94E04A25619D"
        "CEE3D2261AD2EE6BF12FFA06D98A0864"
        "D87602733EC86A64521F2B18177B200C"
        "BBE117577A615D6C770988C0BAD946E2"
        "08E24FA074E5AB3143DB5BFCE0FD108E"
        "4B82D120A92108011A723C12A787E6D7"
        "88719A10BDBA5B2699C327186AF4E23C"
        "1A946834B6150BDA2583E9CA2AD44CE8"
        "DBBBC2DB04DE8EF92E8EFC141FBECAA6"
        "287C59474E6BC05D99B2964FA090C3A2"
        "233BA186515BE7ED1F612970CEE2D7AF"
        "B81BDD762170481CD0069127D5B05AA9"
        "93B4EA988D8FDDC186FFB7DC90A6C08F"
        "4DF435C93402849236C3FAB4D27C7026"
        "C1D4DCB2602646DEC9751E763DBA37BD"
        "F8FF9406AD9E530EE5DB382F413001AE"
        "B06A53ED9027D831179727B0865A8918"
        "DA3EDBEBCF9B14ED44CE6CBACED4BB1B"
        "DB7F1447E6CC254B332051512BD7AF42"
        "6FB8F401378CD2BF5983CA01C64B92EC"
        "F032EA15D1721D03F482D7CE6E74FEF6"
        "D55E702F46980C82B5A84031900B1C9E"
        "59E7C97FBEC7E8F323A97A7E36CC88BE"
        "0F1D45B7FF585AC54BD407B22B4154AA"
        "CC8F6D7EBF48E1D814CC5ED20F8037E0"
        "A79715EEF29BE32806A1D58BB7C5DA76"
        "F550AA3D8A1FBFF0EB19CCB1A313D55C"
        "DA56C9EC2EF29632387FE8D76E3C0468"
        "043E8F663F4860EE12BF2D5B0B7474D6"
        "E694F91E6DCC4024FFFFFFFFFFFFFFFF"
    };

    WOLFSSL_ENTER("wolfSSL_DH_6144_prime");

    if (wolfSSL_BN_hex2bn(&bn, prm) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("Error converting DH 6144 prime to big number");
        return NULL;
    }

    return bn;
}


/* This sets a big number with the 8192-bit prime from RFC 3526.
 *
 * bn  if not NULL then the big number structure is used. If NULL then a new
 *     big number structure is created.
 *
 * Returns a WOLFSSL_BIGNUM structure on success and NULL with failure.
 */
WOLFSSL_BIGNUM* wolfSSL_DH_8192_prime(WOLFSSL_BIGNUM* bn)
{
    const char prm[] = {
        "FFFFFFFFFFFFFFFFC90FDAA22168C234"
        "C4C6628B80DC1CD129024E088A67CC74"
        "020BBEA63B139B22514A08798E3404DD"
        "EF9519B3CD3A431B302B0A6DF25F1437"
        "4FE1356D6D51C245E485B576625E7EC6"
        "F44C42E9A637ED6B0BFF5CB6F406B7ED"
        "EE386BFB5A899FA5AE9F24117C4B1FE6"
        "49286651ECE45B3DC2007CB8A163BF05"
        "98DA48361C55D39A69163FA8FD24CF5F"
        "83655D23DCA3AD961C62F356208552BB"
        "9ED529077096966D670C354E4ABC9804"
        "F1746C08CA18217C32905E462E36CE3B"
        "E39E772C180E86039B2783A2EC07A28F"
        "B5C55DF06F4C52C9DE2BCBF695581718"
        "3995497CEA956AE515D2261898FA0510"
        "15728E5A8AAAC42DAD33170D04507A33"
        "A85521ABDF1CBA64ECFB850458DBEF0A"
        "8AEA71575D060C7DB3970F85A6E1E4C7"
        "ABF5AE8CDB0933D71E8C94E04A25619D"
        "CEE3D2261AD2EE6BF12FFA06D98A0864"
        "D87602733EC86A64521F2B18177B200C"
        "BBE117577A615D6C770988C0BAD946E2"
        "08E24FA074E5AB3143DB5BFCE0FD108E"
        "4B82D120A92108011A723C12A787E6D7"
        "88719A10BDBA5B2699C327186AF4E23C"
        "1A946834B6150BDA2583E9CA2AD44CE8"
        "DBBBC2DB04DE8EF92E8EFC141FBECAA6"
        "287C59474E6BC05D99B2964FA090C3A2"
        "233BA186515BE7ED1F612970CEE2D7AF"
        "B81BDD762170481CD0069127D5B05AA9"
        "93B4EA988D8FDDC186FFB7DC90A6C08F"
        "4DF435C93402849236C3FAB4D27C7026"
        "C1D4DCB2602646DEC9751E763DBA37BD"
        "F8FF9406AD9E530EE5DB382F413001AE"
        "B06A53ED9027D831179727B0865A8918"
        "DA3EDBEBCF9B14ED44CE6CBACED4BB1B"
        "DB7F1447E6CC254B332051512BD7AF42"
        "6FB8F401378CD2BF5983CA01C64B92EC"
        "F032EA15D1721D03F482D7CE6E74FEF6"
        "D55E702F46980C82B5A84031900B1C9E"
        "59E7C97FBEC7E8F323A97A7E36CC88BE"
        "0F1D45B7FF585AC54BD407B22B4154AA"
        "CC8F6D7EBF48E1D814CC5ED20F8037E0"
        "A79715EEF29BE32806A1D58BB7C5DA76"
        "F550AA3D8A1FBFF0EB19CCB1A313D55C"
        "DA56C9EC2EF29632387FE8D76E3C0468"
        "043E8F663F4860EE12BF2D5B0B7474D6"
        "E694F91E6DBE115974A3926F12FEE5E4"
        "38777CB6A932DF8CD8BEC4D073B931BA"
        "3BC832B68D9DD300741FA7BF8AFC47ED"
        "2576F6936BA424663AAB639C5AE4F568"
        "3423B4742BF1C978238F16CBE39D652D"
        "E3FDB8BEFC848AD922222E04A4037C07"
        "13EB57A81A23F0C73473FC646CEA306B"
        "4BCBC8862F8385DDFA9D4B7FA2C087E8"
        "79683303ED5BDD3A062B3CF5B3A278A6"
        "6D2A13F83F44F82DDF310EE074AB6A36"
        "4597E899A0255DC164F31CC50846851D"
        "F9AB48195DED7EA1B1D510BD7EE74D73"
        "FAF36BC31ECFA268359046F4EB879F92"
        "4009438B481C6CD7889A002ED5EE382B"
        "C9190DA6FC026E479558E4475677E9AA"
        "9E3050E2765694DFC81F56E880B96E71"
        "60C980DD98EDD3DFFFFFFFFFFFFFFFFF"
    };

    WOLFSSL_ENTER("wolfSSL_DH_8192_prime");

    if (wolfSSL_BN_hex2bn(&bn, prm) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("Error converting DH 8192 prime to big number");
        return NULL;
    }

    return bn;
}

#if !defined(HAVE_FIPS) || (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION>2))
/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_DH_generate_key(WOLFSSL_DH* dh)
{
    int            ret    = WOLFSSL_FAILURE;
    word32         pubSz  = 0;
    word32         privSz = 0;
    int            initTmpRng = 0;
    WC_RNG*        rng    = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG*        tmpRNG;
#else
    WC_RNG         tmpRNG[1];
#endif
    unsigned char* pub    = NULL;
    unsigned char* priv   = NULL;

    WOLFSSL_MSG("wolfSSL_DH_generate_key");

#ifdef WOLFSSL_SMALL_STACK
    tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
    if (tmpRNG == NULL) {
        XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
        return ret;
    }
#endif

    if (dh == NULL || dh->p == NULL || dh->g == NULL)
        WOLFSSL_MSG("Bad function arguments");
    else if (dh->inSet == 0 && SetDhInternal(dh) != WOLFSSL_SUCCESS)
            WOLFSSL_MSG("Bad DH set internal");
    else if (wc_InitRng(tmpRNG) == 0) {
        rng = tmpRNG;
        initTmpRng = 1;
    }
    else {
        WOLFSSL_MSG("Bad RNG Init, trying global");
        if (initGlobalRNG == 0)
            WOLFSSL_MSG("Global RNG no Init");
        else
            rng = &globalRNG;
    }

    if (rng) {
        pubSz = wolfSSL_BN_num_bytes(dh->p);
        if (dh->length) {
            privSz = dh->length/8; /* to bytes */
        } else {
            privSz = pubSz;
        }
        if (pubSz > 0) {
            pub = (unsigned char*)XMALLOC(pubSz,
                    NULL, DYNAMIC_TYPE_PUBLIC_KEY);
        }
        if (privSz > 0) {
            priv = (unsigned char*)XMALLOC(privSz,
                    NULL, DYNAMIC_TYPE_PRIVATE_KEY);
        }
        if (pub == NULL || priv == NULL) {
            WOLFSSL_MSG("Unable to malloc memory");
        }
        else if (wc_DhGenerateKeyPair((DhKey*)dh->internal, rng, priv, &privSz,
                                                               pub, &pubSz) < 0)
            WOLFSSL_MSG("Bad wc_DhGenerateKeyPair");
        else {
            if (dh->pub_key)
                wolfSSL_BN_free(dh->pub_key);

            dh->pub_key = wolfSSL_BN_new();
            if (dh->pub_key == NULL) {
                WOLFSSL_MSG("Bad DH new pub");
            }
            if (dh->priv_key)
                wolfSSL_BN_free(dh->priv_key);

            dh->priv_key = wolfSSL_BN_new();

            if (dh->priv_key == NULL) {
                WOLFSSL_MSG("Bad DH new priv");
            }

            if (dh->pub_key && dh->priv_key) {
               if (wolfSSL_BN_bin2bn(pub, pubSz, dh->pub_key) == NULL)
                   WOLFSSL_MSG("Bad DH bn2bin error pub");
               else if (wolfSSL_BN_bin2bn(priv, privSz, dh->priv_key) == NULL)
                   WOLFSSL_MSG("Bad DH bn2bin error priv");
               else
                   ret = WOLFSSL_SUCCESS;
            }
        }
    }

    if (initTmpRng)
        wc_FreeRng(tmpRNG);

#ifdef WOLFSSL_SMALL_STACK
    XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif
    XFREE(pub,    NULL, DYNAMIC_TYPE_PUBLIC_KEY);
    XFREE(priv,   NULL, DYNAMIC_TYPE_PRIVATE_KEY);

    return ret;
}


/* return code compliant with OpenSSL :
 *   size of shared secret if success, -1 if error
 */
int wolfSSL_DH_compute_key(unsigned char* key, WOLFSSL_BIGNUM* otherPub,
                          WOLFSSL_DH* dh)
{
    int            ret    = WOLFSSL_FATAL_ERROR;
    word32         keySz  = 0;
    int            pubSz  = 1024;
    int            privSz = 1024;
#ifdef WOLFSSL_SMALL_STACK
    unsigned char* pub;
    unsigned char* priv   = NULL;
#else
    unsigned char  pub [1024];
    unsigned char  priv[1024];
#endif

    WOLFSSL_MSG("wolfSSL_DH_compute_key");

#ifdef WOLFSSL_SMALL_STACK
    pub = (unsigned char*)XMALLOC(pubSz, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
    if (pub == NULL)
        return ret;

    priv = (unsigned char*)XMALLOC(privSz, NULL, DYNAMIC_TYPE_PRIVATE_KEY);
    if (priv == NULL) {
        XFREE(pub, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
        return ret;
    }
#endif

    if (dh == NULL || dh->priv_key == NULL || otherPub == NULL)
        WOLFSSL_MSG("Bad function arguments");
    else if ((keySz = (word32)DH_size(dh)) == 0)
        WOLFSSL_MSG("Bad DH_size");
    else if (wolfSSL_BN_bn2bin(dh->priv_key, NULL) > (int)privSz)
        WOLFSSL_MSG("Bad priv internal size");
    else if (wolfSSL_BN_bn2bin(otherPub, NULL) > (int)pubSz)
        WOLFSSL_MSG("Bad otherPub size");
    else {
        privSz = wolfSSL_BN_bn2bin(dh->priv_key, priv);
        pubSz  = wolfSSL_BN_bn2bin(otherPub, pub);
        if (dh->inSet == 0 && SetDhInternal(dh) != WOLFSSL_SUCCESS){
            WOLFSSL_MSG("Bad DH set internal");
        }
        if (privSz <= 0 || pubSz <= 0)
            WOLFSSL_MSG("Bad BN2bin set");
        else if (wc_DhAgree((DhKey*)dh->internal, key, &keySz,
                            priv, privSz, pub, pubSz) < 0)
            WOLFSSL_MSG("wc_DhAgree failed");
        else
            ret = (int)keySz;
    }

#ifdef WOLFSSL_SMALL_STACK
    XFREE(pub,  NULL, DYNAMIC_TYPE_PUBLIC_KEY);
    XFREE(priv, NULL, DYNAMIC_TYPE_PRIVATE_KEY);
#endif

    WOLFSSL_LEAVE("wolfSSL_DH_compute_key", ret);

    return ret;
}


#if defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x10100000L
/* ownership of p,q,and g get taken over by "dh" on success and should be free'd
 * with a call to wolfSSL_DH_free -- not individually.
 *
 * returns WOLFSSL_SUCCESS on success
 */
int wolfSSL_DH_set0_pqg(WOLFSSL_DH *dh, WOLFSSL_BIGNUM *p,
    WOLFSSL_BIGNUM *q, WOLFSSL_BIGNUM *g)
{
    int ret;
    WOLFSSL_ENTER("wolfSSL_DH_set0_pqg");

    /* q can be NULL */
    if (dh == NULL || p == NULL || g == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }

    /* free existing internal DH structure and recreate with new p / g */
    if (dh->inSet) {
        ret = wc_FreeDhKey((DhKey*)dh->internal);
        if (ret != 0) {
            WOLFSSL_MSG("Unable to free internal DH key");
            return WOLFSSL_FAILURE;
        }
    }

    wolfSSL_BN_free(dh->p);
    wolfSSL_BN_free(dh->q);
    wolfSSL_BN_free(dh->g);

    dh->p = p;
    dh->q = q;
    dh->g = g;

    ret = SetDhInternal(dh);
    if (ret != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("Unable to set internal DH key");
        dh->p = NULL;
        dh->q = NULL;
        dh->g = NULL;
        dh->inSet = 0;
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

#endif /* v1.1.0 or later */
#endif /* !HAVE_FIPS || HAVE_FIPS_VERSION > 2 */

#endif /* NO_DH */
#endif /* OPENSSL_EXTRA */

#if !defined(NO_DSA) && \
    (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL))
static void InitwolfSSL_DSA(WOLFSSL_DSA* dsa)
{
    if (dsa) {
        dsa->p        = NULL;
        dsa->q        = NULL;
        dsa->g        = NULL;
        dsa->pub_key  = NULL;
        dsa->priv_key = NULL;
        dsa->internal = NULL;
        dsa->inSet    = 0;
        dsa->exSet    = 0;
    }
}


WOLFSSL_DSA* wolfSSL_DSA_new(void)
{
    WOLFSSL_DSA* external;
    DsaKey*     key;

    WOLFSSL_MSG("wolfSSL_DSA_new");

    key = (DsaKey*) XMALLOC(sizeof(DsaKey), NULL, DYNAMIC_TYPE_DSA);
    if (key == NULL) {
        WOLFSSL_MSG("wolfSSL_DSA_new malloc DsaKey failure");
        return NULL;
    }

    external = (WOLFSSL_DSA*) XMALLOC(sizeof(WOLFSSL_DSA), NULL,
                                    DYNAMIC_TYPE_DSA);
    if (external == NULL) {
        WOLFSSL_MSG("wolfSSL_DSA_new malloc WOLFSSL_DSA failure");
        XFREE(key, NULL, DYNAMIC_TYPE_DSA);
        return NULL;
    }

    InitwolfSSL_DSA(external);
    if (wc_InitDsaKey(key) != 0) {
        WOLFSSL_MSG("wolfSSL_DSA_new InitDsaKey failure");
        XFREE(key, NULL, DYNAMIC_TYPE_DSA);
        wolfSSL_DSA_free(external);
        return NULL;
    }
    external->internal = key;

    return external;
}


void wolfSSL_DSA_free(WOLFSSL_DSA* dsa)
{
    WOLFSSL_MSG("wolfSSL_DSA_free");

    if (dsa) {
        if (dsa->internal) {
            FreeDsaKey((DsaKey*)dsa->internal);
            XFREE(dsa->internal, NULL, DYNAMIC_TYPE_DSA);
            dsa->internal = NULL;
        }
        wolfSSL_BN_free(dsa->priv_key);
        wolfSSL_BN_free(dsa->pub_key);
        wolfSSL_BN_free(dsa->g);
        wolfSSL_BN_free(dsa->q);
        wolfSSL_BN_free(dsa->p);
        InitwolfSSL_DSA(dsa);  /* set back to NULLs for safety */

        XFREE(dsa, NULL, DYNAMIC_TYPE_DSA);

        /* dsa = NULL, don't try to access or double free it */
    }
}

/* wolfSSL -> OpenSSL */
int SetDsaExternal(WOLFSSL_DSA* dsa)
{
    DsaKey* key;
    WOLFSSL_MSG("Entering SetDsaExternal");

    if (dsa == NULL || dsa->internal == NULL) {
        WOLFSSL_MSG("dsa key NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    key = (DsaKey*)dsa->internal;

    if (SetIndividualExternal(&dsa->p, &key->p) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("dsa p key error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (SetIndividualExternal(&dsa->q, &key->q) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("dsa q key error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (SetIndividualExternal(&dsa->g, &key->g) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("dsa g key error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (SetIndividualExternal(&dsa->pub_key, &key->y) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("dsa y key error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (SetIndividualExternal(&dsa->priv_key, &key->x) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("dsa x key error");
        return WOLFSSL_FATAL_ERROR;
    }

    dsa->exSet = 1;

    return WOLFSSL_SUCCESS;
}
#endif /* !NO_DSA && (OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL) */


#if !defined(NO_DSA) && defined(OPENSSL_EXTRA)
/* Openssl -> WolfSSL */
int SetDsaInternal(WOLFSSL_DSA* dsa)
{
    DsaKey* key;
    WOLFSSL_MSG("Entering SetDsaInternal");

    if (dsa == NULL || dsa->internal == NULL) {
        WOLFSSL_MSG("dsa key NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    key = (DsaKey*)dsa->internal;

    if (dsa->p != NULL &&
        SetIndividualInternal(dsa->p, &key->p) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa p key error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (dsa->q != NULL &&
        SetIndividualInternal(dsa->q, &key->q) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa q key error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (dsa->g != NULL &&
        SetIndividualInternal(dsa->g, &key->g) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa g key error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (dsa->pub_key != NULL) {
        if (SetIndividualInternal(dsa->pub_key, &key->y) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("rsa pub_key error");
            return WOLFSSL_FATAL_ERROR;
        }

        /* public key */
        key->type = DSA_PUBLIC;
    }

    if (dsa->priv_key != NULL) {
        if (SetIndividualInternal(dsa->priv_key, &key->x) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("rsa priv_key error");
            return WOLFSSL_FATAL_ERROR;
        }

        /* private key */
        key->type = DSA_PRIVATE;
    }

    dsa->inSet = 1;

    return WOLFSSL_SUCCESS;
}
#endif /* !NO_DSA && OPENSSL_EXTRA */


#ifdef OPENSSL_EXTRA
#if !defined(NO_RSA)

/* return wolfSSL native error codes. */
static int wolfSSL_RSA_generate_key_native(WOLFSSL_RSA* rsa, int bits, WOLFSSL_BIGNUM* bn,
                                void* cb)
{
    int ret;

    (void)cb;
    (void)bn;
    (void)bits;

    WOLFSSL_ENTER("wolfSSL_RSA_generate_key_native");

    if (rsa == NULL || rsa->internal == NULL) {
        /* bit size checked during make key call */
        WOLFSSL_MSG("bad arguments");
        return BAD_FUNC_ARG;
    }

#ifdef WOLFSSL_KEY_GEN
    {
    #ifdef WOLFSSL_SMALL_STACK
        WC_RNG* rng;
    #else
        WC_RNG  rng[1];
    #endif

    #ifdef WOLFSSL_SMALL_STACK
        rng = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
        if (rng == NULL)
            return MEMORY_E;
    #endif

        if ((ret = wc_InitRng(rng)) < 0)
            WOLFSSL_MSG("RNG init failed");
        else if ((ret = wc_MakeRsaKey((RsaKey*)rsa->internal, bits,
                    wolfSSL_BN_get_word(bn), rng)) != MP_OKAY)
            WOLFSSL_MSG("wc_MakeRsaKey failed");
        else if ((ret = SetRsaExternal(rsa)) != WOLFSSL_SUCCESS)
            WOLFSSL_MSG("SetRsaExternal failed");
        else {
            rsa->inSet = 1;
	    ret = WOLFSSL_ERROR_NONE;
        }

        wc_FreeRng(rng);
    #ifdef WOLFSSL_SMALL_STACK
        XFREE(rng, NULL, DYNAMIC_TYPE_RNG);
    #endif
    }
#else
    WOLFSSL_MSG("No Key Gen built in");
    ret = NOT_COMPILED_IN;
#endif
    return ret;
}

/* Generates a RSA key of length len
 *
 * len  length of RSA key i.e. 2048
 * e    e to use when generating RSA key
 * f    callback function for generation details
 * data user callback argument
 *
 * Note: Because of wc_MakeRsaKey an RSA key size generated can be slightly
 *       rounded down. For example generating a key of size 2999 with e =
 *       65537 will make a key of size 374 instead of 375.
 * Returns a new RSA key on success and NULL on failure
 */
WOLFSSL_RSA* wolfSSL_RSA_generate_key(int len, unsigned long e,
                                      void(*f)(int, int, void*), void* data)
{
    WOLFSSL_RSA*    rsa = NULL;
    WOLFSSL_BIGNUM* bn  = NULL;

    WOLFSSL_ENTER("wolfSSL_RSA_generate_key");

    (void)f;
    (void)data;

    if (len < 0) {
        WOLFSSL_MSG("Bad argument: length was less than 0");
        return NULL;
    }

    bn = wolfSSL_BN_new();
    if (bn == NULL) {
        WOLFSSL_MSG("Error creating big number");
        return NULL;
    }

    if (wolfSSL_BN_set_word(bn, e) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("Error using e value");
        wolfSSL_BN_free(bn);
        return NULL;
    }

    rsa = wolfSSL_RSA_new();
    if (rsa == NULL) {
        WOLFSSL_MSG("memory error");
    }
    else {
        for (;;) {
            int gen_ret = wolfSSL_RSA_generate_key_native(rsa, len, bn, NULL);
            if (gen_ret == WOLFSSL_ERROR_NONE)
                break;
#ifdef HAVE_FIPS
            else if (gen_ret == PRIME_GEN_E)
                continue;
#endif
            else {
                wolfSSL_RSA_free(rsa);
                rsa = NULL;
                break;
            }
        }
    }
    wolfSSL_BN_free(bn);

    return rsa;
}

/* return compliant with OpenSSL
 *   1 if success, 0 if error
 */
int wolfSSL_RSA_generate_key_ex(WOLFSSL_RSA* rsa, int bits, WOLFSSL_BIGNUM* bn,
                                void* cb)
{
    for (;;) {
        int gen_ret = wolfSSL_RSA_generate_key_native(rsa, bits, bn, cb);
        if (gen_ret == WOLFSSL_ERROR_NONE)
            return WOLFSSL_SUCCESS;
#ifdef HAVE_FIPS
        else if (gen_ret == PRIME_GEN_E)
            continue;
#endif
        else
            return WOLFSSL_FAILURE;
    }
}
#endif /* NO_RSA */

#ifndef NO_DSA
/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_DSA_generate_key(WOLFSSL_DSA* dsa)
{
    int ret = WOLFSSL_FAILURE;

    WOLFSSL_ENTER("wolfSSL_DSA_generate_key");

    if (dsa == NULL || dsa->internal == NULL) {
        WOLFSSL_MSG("Bad arguments");
        return WOLFSSL_FAILURE;
    }

    if (dsa->inSet == 0) {
        WOLFSSL_MSG("No DSA internal set, do it");

        if (SetDsaInternal(dsa) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetDsaInternal failed");
            return ret;
        }
    }

#ifdef WOLFSSL_KEY_GEN
    {
        int initTmpRng = 0;
        WC_RNG *rng = NULL;
#ifdef WOLFSSL_SMALL_STACK
        WC_RNG *tmpRNG;
#else
        WC_RNG tmpRNG[1];
#endif

#ifdef WOLFSSL_SMALL_STACK
        tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
        if (tmpRNG == NULL)
            return WOLFSSL_FATAL_ERROR;
#endif
        if (wc_InitRng(tmpRNG) == 0) {
            rng = tmpRNG;
            initTmpRng = 1;
        }
        else {
            WOLFSSL_MSG("Bad RNG Init, trying global");
            if (initGlobalRNG == 0)
                WOLFSSL_MSG("Global RNG no Init");
            else
                rng = &globalRNG;
        }

        if (rng) {
            if (wc_MakeDsaKey(rng, (DsaKey*)dsa->internal) != MP_OKAY)
                WOLFSSL_MSG("wc_MakeDsaKey failed");
            else if (SetDsaExternal(dsa) != WOLFSSL_SUCCESS)
                WOLFSSL_MSG("SetDsaExternal failed");
            else
                ret = WOLFSSL_SUCCESS;
        }

        if (initTmpRng)
            wc_FreeRng(tmpRNG);

#ifdef WOLFSSL_SMALL_STACK
        XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif
    }
#else /* WOLFSSL_KEY_GEN */
    WOLFSSL_MSG("No Key Gen built in");
#endif
    return ret;
}


/* Returns a pointer to a new WOLFSSL_DSA structure on success and NULL on fail
 */
WOLFSSL_DSA* wolfSSL_DSA_generate_parameters(int bits, unsigned char* seed,
        int seedLen, int* counterRet, unsigned long* hRet,
        WOLFSSL_BN_CB cb, void* CBArg)
{
    WOLFSSL_DSA* dsa;

    WOLFSSL_ENTER("wolfSSL_DSA_generate_parameters()");

    (void)cb;
    (void)CBArg;
    dsa = wolfSSL_DSA_new();
    if (dsa == NULL) {
        return NULL;
    }

    if (wolfSSL_DSA_generate_parameters_ex(dsa, bits, seed, seedLen,
                                  counterRet, hRet, NULL) != WOLFSSL_SUCCESS) {
        wolfSSL_DSA_free(dsa);
        return NULL;
    }

    return dsa;
}


/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_DSA_generate_parameters_ex(WOLFSSL_DSA* dsa, int bits,
                                       unsigned char* seed, int seedLen,
                                       int* counterRet,
                                       unsigned long* hRet, void* cb)
{
    int ret = WOLFSSL_FAILURE;

    (void)bits;
    (void)seed;
    (void)seedLen;
    (void)counterRet;
    (void)hRet;
    (void)cb;

    WOLFSSL_ENTER("wolfSSL_DSA_generate_parameters_ex");

    if (dsa == NULL || dsa->internal == NULL) {
        WOLFSSL_MSG("Bad arguments");
        return WOLFSSL_FAILURE;
    }

#ifdef WOLFSSL_KEY_GEN
    {
        int initTmpRng = 0;
        WC_RNG *rng = NULL;
#ifdef WOLFSSL_SMALL_STACK
        WC_RNG *tmpRNG;
#else
        WC_RNG tmpRNG[1];
#endif

#ifdef WOLFSSL_SMALL_STACK
        tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
        if (tmpRNG == NULL)
            return WOLFSSL_FATAL_ERROR;
#endif
        if (wc_InitRng(tmpRNG) == 0) {
            rng = tmpRNG;
            initTmpRng = 1;
        }
        else {
            WOLFSSL_MSG("Bad RNG Init, trying global");
            if (initGlobalRNG == 0)
                WOLFSSL_MSG("Global RNG no Init");
            else
                rng = &globalRNG;
        }

        if (rng) {
            if (wc_MakeDsaParameters(rng, bits,
                                     (DsaKey*)dsa->internal) != MP_OKAY)
                WOLFSSL_MSG("wc_MakeDsaParameters failed");
            else if (SetDsaExternal(dsa) != WOLFSSL_SUCCESS)
                WOLFSSL_MSG("SetDsaExternal failed");
            else
                ret = WOLFSSL_SUCCESS;
        }

        if (initTmpRng)
            wc_FreeRng(tmpRNG);

#ifdef WOLFSSL_SMALL_STACK
        XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif
    }
#else /* WOLFSSL_KEY_GEN */
    WOLFSSL_MSG("No Key Gen built in");
#endif

    return ret;
}

WOLFSSL_DSA_SIG* wolfSSL_DSA_SIG_new(void)
{
    WOLFSSL_DSA_SIG* sig;
    WOLFSSL_ENTER("wolfSSL_DSA_SIG_new");
    sig = (WOLFSSL_DSA_SIG*)XMALLOC(sizeof(WOLFSSL_DSA_SIG), NULL, DYNAMIC_TYPE_OPENSSL);
    if (sig)
        XMEMSET(sig, 0, sizeof(WOLFSSL_DSA_SIG));
    return sig;
}

void wolfSSL_DSA_SIG_free(WOLFSSL_DSA_SIG *sig)
{
    WOLFSSL_ENTER("wolfSSL_DSA_SIG_free");
    if (sig) {
        if (sig->r) {
            wolfSSL_BN_free(sig->r);
        }
        if (sig->s) {
            wolfSSL_BN_free(sig->s);
        }
        XFREE(sig, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}

/* return WOLFSSL_SUCCESS on success, < 0 otherwise */
int wolfSSL_DSA_do_sign(const unsigned char* d, unsigned char* sigRet,
                       WOLFSSL_DSA* dsa)
{
    int     ret = WOLFSSL_FATAL_ERROR;
    int     initTmpRng = 0;
    WC_RNG* rng = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG* tmpRNG = NULL;
#else
    WC_RNG  tmpRNG[1];
#endif

    WOLFSSL_ENTER("wolfSSL_DSA_do_sign");

    if (d == NULL || sigRet == NULL || dsa == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return ret;
    }

    if (dsa->inSet == 0)
    {
        WOLFSSL_MSG("No DSA internal set, do it");

        if (SetDsaInternal(dsa) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetDsaInternal failed");
            return ret;
        }
    }

#ifdef WOLFSSL_SMALL_STACK
    tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
    if (tmpRNG == NULL)
        return WOLFSSL_FATAL_ERROR;
#endif

    if (wc_InitRng(tmpRNG) == 0) {
        rng = tmpRNG;
        initTmpRng = 1;
    }
    else {
        WOLFSSL_MSG("Bad RNG Init, trying global");
        if (initGlobalRNG == 0)
            WOLFSSL_MSG("Global RNG no Init");
        else
            rng = &globalRNG;
    }

    if (rng) {
        if (DsaSign(d, sigRet, (DsaKey*)dsa->internal, rng) < 0)
            WOLFSSL_MSG("DsaSign failed");
        else
            ret = WOLFSSL_SUCCESS;
    }

    if (initTmpRng)
        wc_FreeRng(tmpRNG);
#ifdef WOLFSSL_SMALL_STACK
    XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif

    return ret;
}

#if !defined(HAVE_SELFTEST) && !defined(HAVE_FIPS)
WOLFSSL_DSA_SIG* wolfSSL_DSA_do_sign_ex(const unsigned char* digest,
                                        int outLen, WOLFSSL_DSA* dsa)
{
    WOLFSSL_DSA_SIG* sig = NULL;
    byte sigBin[DSA_SIG_SIZE];

    WOLFSSL_ENTER("wolfSSL_DSA_do_sign_ex");

    if (!digest || !dsa || outLen != WC_SHA_DIGEST_SIZE) {
        WOLFSSL_MSG("Bad function arguments");
        return NULL;
    }

    if (wolfSSL_DSA_do_sign(digest, sigBin, dsa) != WOLFSSL_SUCCESS) {
        return NULL;
    }

    if (!(sig = wolfSSL_DSA_SIG_new())) {
        goto error;
    }

    if (!(sig->r = wolfSSL_BN_bin2bn(sigBin, DSA_HALF_SIZE, NULL))) {
        goto error;
    }

    if (!(sig->s = wolfSSL_BN_bin2bn(sigBin + DSA_HALF_SIZE, DSA_HALF_SIZE, NULL))) {
        goto error;
    }

    return sig;
error:
    if (sig) {
        wolfSSL_DSA_SIG_free(sig);
    }
    return NULL;
}
#endif /* !HAVE_SELFTEST && !HAVE_FIPS */

int wolfSSL_DSA_do_verify(const unsigned char* d, unsigned char* sig,
                        WOLFSSL_DSA* dsa, int *dsacheck)
{
    int    ret = WOLFSSL_FATAL_ERROR;

    WOLFSSL_ENTER("wolfSSL_DSA_do_verify");

    if (d == NULL || sig == NULL || dsa == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FATAL_ERROR;
    }
    if (dsa->inSet == 0)
    {
        WOLFSSL_MSG("No DSA internal set, do it");

        if (SetDsaInternal(dsa) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetDsaInternal failed");
            return WOLFSSL_FATAL_ERROR;
        }
    }

    ret = DsaVerify(d, sig, (DsaKey*)dsa->internal, dsacheck);
    if (ret != 0 || *dsacheck != 1) {
        WOLFSSL_MSG("DsaVerify failed");
        return ret;
    }

    return WOLFSSL_SUCCESS;
}


int wolfSSL_DSA_bits(const WOLFSSL_DSA *d)
{
    if (!d)
        return WOLFSSL_FAILURE;
    if (!d->exSet && SetDsaExternal((WOLFSSL_DSA*)d) != WOLFSSL_SUCCESS)
        return WOLFSSL_FAILURE;
    return wolfSSL_BN_num_bits(d->p);
}

#if !defined(HAVE_SELFTEST) && !defined(HAVE_FIPS)
int wolfSSL_DSA_do_verify_ex(const unsigned char* digest, int digest_len,
                             WOLFSSL_DSA_SIG* sig, WOLFSSL_DSA* dsa)
{
    int dsacheck, sz;
    byte sigBin[DSA_SIG_SIZE];
    byte* sigBinPtr = sigBin;

    WOLFSSL_ENTER("wolfSSL_DSA_do_verify_ex");

    if (!digest || !sig || !dsa || digest_len != WC_SHA_DIGEST_SIZE) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }

    if (!sig->r || !sig->s) {
        WOLFSSL_MSG("No signature found in DSA_SIG");
        return WOLFSSL_FAILURE;
    }

    /* front pad with zeros */
    if (!(sz = wolfSSL_BN_num_bytes(sig->r))) {
        return WOLFSSL_FAILURE;
    }
    while (sz++ < DSA_HALF_SIZE) {
        *sigBinPtr++ = 0;
    }

    if (wolfSSL_BN_bn2bin(sig->r, sigBinPtr) == WOLFSSL_FATAL_ERROR) {
        return WOLFSSL_FAILURE;
    }

    /* Move to s */
    sigBinPtr = sigBin + DSA_HALF_SIZE;

    /* front pad with zeros */
    if (!(sz = wolfSSL_BN_num_bytes(sig->s))) {
        return WOLFSSL_FAILURE;
    }
    while (sz++ < DSA_HALF_SIZE) {
        *sigBinPtr++ = 0;
    }

    if (wolfSSL_BN_bn2bin(sig->s, sigBinPtr) == WOLFSSL_FATAL_ERROR) {
        return WOLFSSL_FAILURE;
    }

    if (wolfSSL_DSA_do_verify(digest, sigBin, dsa, &dsacheck) != WOLFSSL_SUCCESS ||
            dsacheck != 1) {
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}
#endif /* !HAVE_SELFTEST && !HAVE_FIPS */
#endif /* NO_DSA */


#if !defined(NO_RSA) && !defined(HAVE_USER_RSA)

#ifdef DEBUG_SIGN
static void DEBUG_SIGN_msg(const char *title, const unsigned char *out, unsigned int outlen)
{
    const unsigned char *pt;
    printf("%s[%d] = \n", title, (int)outlen);
    outlen = outlen>100?100:outlen;
    for (pt = out; pt < out + outlen;
            printf("%c", ((*pt)&0x6f)>='A'?((*pt)&0x6f):'.'), pt++);
    printf("\n");
}
#else
#define DEBUG_SIGN_msg(a,b,c)
#endif

static int nid2HashSum(int type) {
    switch (type) {
    #ifdef WOLFSSL_MD2
        case NID_md2:       type = MD2h;    break;
    #endif
    #ifndef NO_MD5
        case NID_md5:       type = MD5h;    break;
    #endif
    #ifndef NO_SHA
        case NID_sha1:      type = SHAh;    break;
    #endif
    #ifndef NO_SHA256
        case NID_sha256:    type = SHA256h; break;
    #endif
    #ifdef WOLFSSL_SHA384
        case NID_sha384:    type = SHA384h; break;
    #endif
    #ifdef WOLFSSL_SHA512
        case NID_sha512:    type = SHA512h; break;
    #endif
    #ifndef WOLFSSL_NOSHA3_224
        case NID_sha3_224:  type = SHA3_224h; break;
    #endif
    #ifndef WOLFSSL_NOSHA3_256
        case NID_sha3_256:  type = SHA3_256h; break;
    #endif
    #ifndef WOLFSSL_NOSHA3_384
        case NID_sha3_384:  type = SHA3_384h; break;
    #endif
    #ifndef WOLFSSL_NOSHA3_512
        case NID_sha3_512:  type = SHA3_512h; break;
    #endif
        default:
            WOLFSSL_MSG("This NID (md type) not configured or not implemented");
            return 0;
    }
    return type;
}

/* return WOLFSSL_SUCCESS on ok, 0 otherwise */
int wolfSSL_RSA_sign(int type, const unsigned char* m,
                           unsigned int mLen, unsigned char* sigRet,
                           unsigned int* sigLen, WOLFSSL_RSA* rsa)
{
    return wolfSSL_RSA_sign_ex(type, m, mLen, sigRet, sigLen, rsa, 1);
}

int wolfSSL_RSA_sign_ex(int type, const unsigned char* m,
                           unsigned int mLen, unsigned char* sigRet,
                           unsigned int* sigLen, WOLFSSL_RSA* rsa, int flag)
{
    return wolfSSL_RSA_sign_generic_padding(type, m, mLen, sigRet, sigLen,
            rsa, flag, RSA_PKCS1_PADDING);
}

/**
 * Sign a message with the chosen message digest, padding, and RSA key.
 * @param type      Hash NID
 * @param m         Message to sign. Most likely this will be the digest of
 *                  the message to sign
 * @param mLen      Length of message to sign
 * @param sigRet    Output buffer
 * @param sigLen    On Input: length of sigRet buffer
 *                  On Output: length of data written to sigRet
 * @param rsa       RSA key used to sign the input
 * @param flag      1: Output the signature
 *                  0: Output the value that the unpadded signature should be
 *                     compared to. Note: for RSA_PKCS1_PSS_PADDING the
 *                     wc_RsaPSS_CheckPadding_ex function should be used to check
 *                     the output of a *Verify* function.
 * @param padding   Padding to use. Only RSA_PKCS1_PSS_PADDING and
 *                  RSA_PKCS1_PADDING are currently supported for signing.
 * @return          WOLFSSL_SUCCESS on success and WOLFSSL_FAILURE on error
 */
int wolfSSL_RSA_sign_generic_padding(int type, const unsigned char* m,
                           unsigned int mLen, unsigned char* sigRet,
                           unsigned int* sigLen, WOLFSSL_RSA* rsa, int flag,
                           int padding)
{
    word32  outLen;
    word32  signSz;
    int     initTmpRng = 0;
    WC_RNG* rng        = NULL;
    int     ret        = 0;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG* tmpRNG     = NULL;
    byte*   encodedSig = NULL;
#else
    WC_RNG  tmpRNG[1];
    byte    encodedSig[MAX_ENCODED_SIG_SZ];
#endif

    WOLFSSL_ENTER("wolfSSL_RSA_sign_generic_padding");

    if (m == NULL || sigRet == NULL || sigLen == NULL || rsa == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }
    DEBUG_SIGN_msg("Message to Sign", m, mLen);

    if (rsa->inSet == 0) {
        WOLFSSL_MSG("No RSA internal set, do it");

        if (SetRsaInternal(rsa) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetRsaInternal failed");
            return WOLFSSL_FAILURE;
        }
    }

    type = nid2HashSum(type);

    outLen = (word32)wolfSSL_BN_num_bytes(rsa->n);

#ifdef WOLFSSL_SMALL_STACK
    tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
    if (tmpRNG == NULL)
        return WOLFSSL_FAILURE;

    encodedSig = (byte*)XMALLOC(MAX_ENCODED_SIG_SZ, NULL,
                                                   DYNAMIC_TYPE_SIGNATURE);
    if (encodedSig == NULL) {
        XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
        return WOLFSSL_FAILURE;
    }
#endif

    if (outLen == 0) {
        WOLFSSL_MSG("Bad RSA size");
    }
    else if (wc_InitRng(tmpRNG) == 0) {
        rng = tmpRNG;
        initTmpRng = 1;
    }
    else {
        WOLFSSL_MSG("Bad RNG Init, trying global");

        if (initGlobalRNG == 0)
            WOLFSSL_MSG("Global RNG no Init");
        else
            rng = &globalRNG;
    }

    if (rng) {
        if (flag != 0) {
            switch (padding) {
#ifdef WC_RSA_NO_PADDING
            case RSA_NO_PADDING:
                WOLFSSL_MSG("RSA_NO_PADDING not supported for signing");
                ret = BAD_FUNC_ARG;
                break;
#endif
#if !defined(HAVE_FIPS) && !defined(HAVE_SELFTEST) && defined(WC_RSA_PSS)
            case RSA_PKCS1_PSS_PADDING:
            {
                enum wc_HashType hType = wc_OidGetHash(type);
#ifndef WOLFSSL_PSS_SALT_LEN_DISCOVER
                WOLFSSL_MSG("Using RSA-PSS with hash length salt. "
                            "OpenSSL uses max length by default.");
#endif
                ret = wc_RsaPSS_Sign_ex(m, mLen, sigRet, outLen,
                        hType, wc_hash2mgf(hType),
#ifndef WOLFSSL_PSS_SALT_LEN_DISCOVER
                        RSA_PSS_SALT_LEN_DEFAULT,
#else
                        RSA_PSS_SALT_LEN_DISCOVER,
#endif
                        (RsaKey*)rsa->internal, rng);
                break;
            }
#endif
#ifndef WC_NO_RSA_OAEP
            case RSA_PKCS1_OAEP_PADDING:
            {
                WOLFSSL_MSG("RSA_PKCS1_OAEP_PADDING not supported for signing");
                ret = BAD_FUNC_ARG;
                break;
            }
#endif
            case RSA_PKCS1_PADDING:
                signSz = wc_EncodeSignature(encodedSig, m, mLen, type);
                if (signSz == 0) {
                    WOLFSSL_MSG("Bad Encode Signature");
                }
                DEBUG_SIGN_msg("Encoded Message", encodedSig, signSz);
                ret = wc_RsaSSL_Sign(encodedSig, signSz, sigRet, outLen,
                                (RsaKey*)rsa->internal, rng);
                break;
            default:
                WOLFSSL_MSG("Unsupported padding");
                ret = BAD_FUNC_ARG;
                break;
            }
            if (ret <= 0) {
                WOLFSSL_MSG("Bad Rsa Sign");
                ret = 0;
            }
            else {
                *sigLen = (unsigned int)ret;
                ret = WOLFSSL_SUCCESS;
                DEBUG_SIGN_msg("Signature", sigRet, *sigLen);
            }
        } else {
            switch (padding) {
            case RSA_NO_PADDING:
            case RSA_PKCS1_PSS_PADDING:
            case RSA_PKCS1_OAEP_PADDING:
                ret = WOLFSSL_SUCCESS;
                XMEMCPY(sigRet, m, mLen);
                *sigLen = mLen;
                break;
            case RSA_PKCS1_PADDING:
            default:
                signSz = wc_EncodeSignature(encodedSig, m, mLen, type);
                if (signSz == 0) {
                    WOLFSSL_MSG("Bad Encode Signature");
                }
                ret = WOLFSSL_SUCCESS;
                XMEMCPY(sigRet, encodedSig, signSz);
                *sigLen = signSz;
                break;
            }
        }
    }

    if (initTmpRng)
        wc_FreeRng(tmpRNG);

#ifdef WOLFSSL_SMALL_STACK
    XFREE(tmpRNG,     NULL, DYNAMIC_TYPE_RNG);
    XFREE(encodedSig, NULL, DYNAMIC_TYPE_SIGNATURE);
#endif

    if (ret == WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("wolfSSL_RSA_sign_generic_padding success");
    }
    else {
        WOLFSSL_LEAVE("wolfSSL_RSA_sign_generic_padding", ret);
        WOLFSSL_MSG("wolfSSL_RSA_sign_generic_padding failed. "
                    "Returning WOLFSSL_FAILURE.");
        ret = WOLFSSL_FAILURE;
    }
    return ret;
}

/* returns WOLFSSL_SUCCESS on successful verify and WOLFSSL_FAILURE on fail */
int wolfSSL_RSA_verify(int type, const unsigned char* m,
                               unsigned int mLen, const unsigned char* sig,
                               unsigned int sigLen, WOLFSSL_RSA* rsa)
{
    return wolfSSL_RSA_verify_ex(type, m, mLen, sig, sigLen, rsa, RSA_PKCS1_PADDING);
}

/* returns WOLFSSL_SUCCESS on successful verify and WOLFSSL_FAILURE on fail */
int wolfSSL_RSA_verify_ex(int type, const unsigned char* m,
                               unsigned int mLen, const unsigned char* sig,
                               unsigned int sigLen, WOLFSSL_RSA* rsa,
                               int padding) {
    int     ret = WOLFSSL_FAILURE;
    unsigned char *sigRet = NULL;
    unsigned char *sigDec = NULL;
    unsigned int   len = 0;
    int verLen;
#if !defined(HAVE_FIPS) && !defined(HAVE_SELFTEST)
    int hSum = nid2HashSum(type);
    enum wc_HashType hType;
#endif

    WOLFSSL_ENTER("wolfSSL_RSA_verify");
    if ((m == NULL) || (sig == NULL)) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }
    sigDec = (unsigned char *)XMALLOC(sigLen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (sigDec == NULL) {
        WOLFSSL_MSG("Memory failure");
        goto cleanup;
    }
    if (padding != RSA_PKCS1_PSS_PADDING) {
        sigRet = (unsigned char *)XMALLOC(sigLen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        if (sigRet == NULL) {
            WOLFSSL_MSG("Memory failure");
            goto cleanup;
        }
        /* get non-encrypted signature to be compared with decrypted signature */
        if (wolfSSL_RSA_sign_generic_padding(type, m, mLen, sigRet, &len, rsa,
                0, padding) <= 0) {
            WOLFSSL_MSG("Message Digest Error");
            goto cleanup;
        }
        DEBUG_SIGN_msg("Encoded Message", sigRet, len);
    }
    else {
        DEBUG_SIGN_msg("Encoded Message", m, mLen);
    }
    /* decrypt signature */
#if !defined(HAVE_FIPS) && !defined(HAVE_SELFTEST)
    hType = wc_OidGetHash(hSum);
    if ((verLen = wc_RsaSSL_Verify_ex2(sig, sigLen, (unsigned char *)sigDec,
            sigLen, (RsaKey*)rsa->internal, padding, hType)) <= 0) {
        WOLFSSL_MSG("RSA Decrypt error");
        goto cleanup;
    }
#else
    verLen = wc_RsaSSL_Verify(sig, sigLen, (unsigned char *)sigDec, sigLen,
        (RsaKey*)rsa->internal);
#endif
    DEBUG_SIGN_msg("Decrypted Signature", sigDec, ret);
#if !defined(HAVE_FIPS) && !defined(HAVE_SELFTEST) && defined(WC_RSA_PSS)
    if (padding == RSA_PKCS1_PSS_PADDING) {
        if (wc_RsaPSS_CheckPadding_ex(m, mLen, sigDec, verLen,
                hType,
#ifndef WOLFSSL_PSS_SALT_LEN_DISCOVER
                RSA_PSS_SALT_LEN_DEFAULT,
#else
                RSA_PSS_SALT_LEN_DISCOVER,
#endif
                mp_count_bits(&((RsaKey*)rsa->internal)->n)) != 0) {
            WOLFSSL_MSG("wc_RsaPSS_CheckPadding_ex error");
            goto cleanup;
        }
    }
    else
#endif /* !defined(HAVE_FIPS) && !defined(HAVE_SELFTEST) */
    if ((int)len != verLen || XMEMCMP(sigRet, sigDec, verLen) != 0) {
        WOLFSSL_MSG("wolfSSL_RSA_verify_ex failed");
        goto cleanup;
    }

    WOLFSSL_MSG("wolfSSL_RSA_verify_ex success");
    ret = WOLFSSL_SUCCESS;
cleanup:
    if (sigRet)
        XFREE(sigRet, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (sigDec)
        XFREE(sigDec, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    return ret;
}

void wolfSSL_RSA_get0_key(const WOLFSSL_RSA *r, const WOLFSSL_BIGNUM **n,
    const WOLFSSL_BIGNUM **e, const WOLFSSL_BIGNUM **d)
{
    WOLFSSL_ENTER("wolfSSL_RSA_get0_key");

    if (r != NULL) {
        if (n != NULL)
            *n = r->n;
        if (e != NULL)
            *e = r->e;
        if (d != NULL)
            *d = r->d;
    } else {
        if (n != NULL)
            *n = NULL;
        if (e != NULL)
            *e = NULL;
        if (d != NULL)
            *d = NULL;
    }
}

/* generate p-1 and q-1, WOLFSSL_SUCCESS on ok */
int wolfSSL_RSA_GenAdd(WOLFSSL_RSA* rsa)
{
    int    err;
    mp_int tmp;

    WOLFSSL_MSG("wolfSSL_RsaGenAdd");

    if (rsa == NULL || rsa->p == NULL || rsa->q == NULL || rsa->d == NULL ||
                       rsa->dmp1 == NULL || rsa->dmq1 == NULL) {
        WOLFSSL_MSG("rsa no init error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (mp_init(&tmp) != MP_OKAY) {
        WOLFSSL_MSG("mp_init error");
        return WOLFSSL_FATAL_ERROR;
    }

    err = mp_sub_d((mp_int*)rsa->p->internal, 1, &tmp);
    if (err != MP_OKAY) {
        WOLFSSL_MSG("mp_sub_d error");
    }
    else
        err = mp_mod((mp_int*)rsa->d->internal, &tmp,
                     (mp_int*)rsa->dmp1->internal);

    if (err != MP_OKAY) {
        WOLFSSL_MSG("mp_mod error");
    }
    else
        err = mp_sub_d((mp_int*)rsa->q->internal, 1, &tmp);
    if (err != MP_OKAY) {
        WOLFSSL_MSG("mp_sub_d error");
    }
    else
        err = mp_mod((mp_int*)rsa->d->internal, &tmp,
                     (mp_int*)rsa->dmq1->internal);

    mp_clear(&tmp);

    if (err == MP_OKAY)
        return WOLFSSL_SUCCESS;
    else
        return WOLFSSL_FATAL_ERROR;
}
#endif /* !NO_RSA && !HAVE_USER_RSA */

WOLFSSL_HMAC_CTX* wolfSSL_HMAC_CTX_new(void)
{
    WOLFSSL_HMAC_CTX* hmac_ctx = (WOLFSSL_HMAC_CTX*)XMALLOC(
        sizeof(WOLFSSL_HMAC_CTX), NULL, DYNAMIC_TYPE_OPENSSL);
    if (hmac_ctx != NULL) {
        XMEMSET(hmac_ctx, 0, sizeof(WOLFSSL_HMAC_CTX));
    }
    return hmac_ctx;
}

int wolfSSL_HMAC_CTX_Init(WOLFSSL_HMAC_CTX* ctx)
{
    WOLFSSL_MSG("wolfSSL_HMAC_CTX_Init");

    if (ctx != NULL) {
        /* wc_HmacSetKey sets up ctx->hmac */
        XMEMSET(ctx, 0, sizeof(WOLFSSL_HMAC_CTX));
    }

    return WOLFSSL_SUCCESS;
}


int wolfSSL_HMAC_Init_ex(WOLFSSL_HMAC_CTX* ctx, const void* key,
                             int keylen, const EVP_MD* type, WOLFSSL_ENGINE* e)
{
    WOLFSSL_ENTER("wolfSSL_HMAC_Init_ex");

    /* WOLFSSL_ENGINE not used, call wolfSSL_HMAC_Init */
    (void)e;
    return wolfSSL_HMAC_Init(ctx, key, keylen, type);
}


/* helper function for Deep copy of internal wolfSSL hmac structure
 * returns WOLFSSL_SUCCESS on success */
int wolfSSL_HmacCopy(Hmac* des, Hmac* src)
{
    void* heap;
    int ret;

#ifndef HAVE_FIPS
    heap = src->heap;
#else
    heap = NULL;
#endif
    if (wc_HmacInit(des, heap, 0) != 0) {
        return WOLFSSL_FAILURE;
    }

    /* requires that hash structures have no dynamic parts to them */
    switch (src->macType) {
    #ifndef NO_MD5
        case WC_MD5:
            ret = wc_Md5Copy(&src->hash.md5, &des->hash.md5);
            break;
    #endif /* !NO_MD5 */

    #ifndef NO_SHA
        case WC_SHA:
            ret = wc_ShaCopy(&src->hash.sha, &des->hash.sha);
            break;
    #endif /* !NO_SHA */

    #ifdef WOLFSSL_SHA224
        case WC_SHA224:
            ret = wc_Sha224Copy(&src->hash.sha224, &des->hash.sha224);
            break;
    #endif /* WOLFSSL_SHA224 */

    #ifndef NO_SHA256
        case WC_SHA256:
            ret = wc_Sha256Copy(&src->hash.sha256, &des->hash.sha256);
            break;
    #endif /* !NO_SHA256 */

    #ifdef WOLFSSL_SHA384
        case WC_SHA384:
            ret = wc_Sha384Copy(&src->hash.sha384, &des->hash.sha384);
            break;
    #endif /* WOLFSSL_SHA384 */
    #ifdef WOLFSSL_SHA512
        case WC_SHA512:
            ret = wc_Sha512Copy(&src->hash.sha512, &des->hash.sha512);
            break;
    #endif /* WOLFSSL_SHA512 */
#ifdef WOLFSSL_SHA3
    #ifndef WOLFSSL_NOSHA3_224
        case WC_SHA3_224:
            ret = wc_Sha3_224_Copy(&src->hash.sha3, &des->hash.sha3);
            break;
    #endif /* WOLFSSL_NO_SHA3_224 */
    #ifndef WOLFSSL_NOSHA3_256
        case WC_SHA3_256:
            ret = wc_Sha3_256_Copy(&src->hash.sha3, &des->hash.sha3);
            break;
    #endif /* WOLFSSL_NO_SHA3_256 */
    #ifndef WOLFSSL_NOSHA3_384
        case WC_SHA3_384:
            ret = wc_Sha3_384_Copy(&src->hash.sha3, &des->hash.sha3);
            break;
    #endif /* WOLFSSL_NO_SHA3_384 */
    #ifndef WOLFSSL_NOSHA3_512
        case WC_SHA3_512:
            ret = wc_Sha3_512_Copy(&src->hash.sha3, &des->hash.sha3);
            break;
    #endif /* WOLFSSL_NO_SHA3_512 */
#endif /* WOLFSSL_SHA3 */

        default:
            return WOLFSSL_FAILURE;
    }

    if (ret != 0)
        return WOLFSSL_FAILURE;

    XMEMCPY((byte*)des->ipad, (byte*)src->ipad, WC_HMAC_BLOCK_SIZE);
    XMEMCPY((byte*)des->opad, (byte*)src->opad, WC_HMAC_BLOCK_SIZE);
    XMEMCPY((byte*)des->innerHash, (byte*)src->innerHash, WC_MAX_DIGEST_SIZE);
#ifndef HAVE_FIPS
    des->heap    = heap;
#endif
    des->macType = src->macType;
    des->innerHashKeyed = src->innerHashKeyed;

#ifdef WOLFSSL_ASYNC_CRYPT
    XMEMCPY(&des->asyncDev, &src->asyncDev, sizeof(WC_ASYNC_DEV));
    des->keyLen = src->keyLen;
    #ifdef HAVE_CAVIUM
        des->data = (byte*)XMALLOC(src->dataLen, des->heap,
                DYNAMIC_TYPE_HMAC);
        if (des->data == NULL) {
            return BUFFER_E;
        }
        XMEMCPY(des->data, src->data, src->dataLen);
        des->dataLen = src->dataLen;
    #endif /* HAVE_CAVIUM */
#endif /* WOLFSSL_ASYNC_CRYPT */
        return WOLFSSL_SUCCESS;
}


/* Deep copy of information from src to des structure
 *
 * des destination to copy information to
 * src structure to get information from
 *
 * Returns WOLFSSL_SUCCESS on success and WOLFSSL_FAILURE on error
 */
int wolfSSL_HMAC_CTX_copy(WOLFSSL_HMAC_CTX* des, WOLFSSL_HMAC_CTX* src)
{
    WOLFSSL_ENTER("wolfSSL_HMAC_CTX_copy");

    if (des == NULL || src == NULL) {
        return WOLFSSL_FAILURE;
    }

    des->type = src->type;
    XMEMCPY((byte *)&des->save_ipad, (byte *)&src->hmac.ipad,
                                        WC_HMAC_BLOCK_SIZE);
    XMEMCPY((byte *)&des->save_opad, (byte *)&src->hmac.opad,
                                        WC_HMAC_BLOCK_SIZE);

    return wolfSSL_HmacCopy(&des->hmac, &src->hmac);
}


#if defined(HAVE_FIPS) && \
    (!defined(HAVE_FIPS_VERSION) || (HAVE_FIPS_VERSION < 2))

static int _HMAC_Init(Hmac* hmac, int type, void* heap)
{
    int ret = 0;

    switch (type) {
    #ifndef NO_MD5
        case WC_MD5:
            ret = wc_InitMd5(&hmac->hash.md5);
            break;
    #endif /* !NO_MD5 */

    #ifndef NO_SHA
        case WC_SHA:
            ret = wc_InitSha(&hmac->hash.sha);
            break;
    #endif /* !NO_SHA */

    #ifdef WOLFSSL_SHA224
        case WC_SHA224:
            ret = wc_InitSha224(&hmac->hash.sha224);
            break;
    #endif /* WOLFSSL_SHA224 */

    #ifndef NO_SHA256
        case WC_SHA256:
            ret = wc_InitSha256(&hmac->hash.sha256);
            break;
    #endif /* !NO_SHA256 */

    #ifdef WOLFSSL_SHA384
        case WC_SHA384:
            ret = wc_InitSha384(&hmac->hash.sha384);
            break;
    #endif /* WOLFSSL_SHA384 */
    #ifdef WOLFSSL_SHA512
        case WC_SHA512:
            ret = wc_InitSha512(&hmac->hash.sha512);
            break;
    #endif /* WOLFSSL_SHA512 */

    #ifdef WOLFSSL_SHA3
        case WC_SHA3_224:
            ret = wc_InitSha3_224(&hmac->hash.sha3, heap, INVALID_DEVID);
            break;
        case WC_SHA3_256:
            ret = wc_InitSha3_256(&hmac->hash.sha3, heap, INVALID_DEVID);
            break;
        case WC_SHA3_384:
            ret = wc_InitSha3_384(&hmac->hash.sha3, heap, INVALID_DEVID);
            break;
        case WC_SHA3_512:
            ret = wc_InitSha3_512(&hmac->hash.sha3, heap, INVALID_DEVID);
            break;
    #endif

        default:
            ret = BAD_FUNC_ARG;
            break;
    }

    (void)heap;

    return ret;
}

#else
    #define _HMAC_Init _InitHmac
#endif


int wolfSSL_HMAC_Init(WOLFSSL_HMAC_CTX* ctx, const void* key, int keylen,
                  const EVP_MD* type)
{
    int hmac_error = 0;
    void* heap = NULL;
    int inited;

    WOLFSSL_MSG("wolfSSL_HMAC_Init");

    if (ctx == NULL) {
        WOLFSSL_MSG("no ctx on init");
        return WOLFSSL_FAILURE;
    }

#ifndef HAVE_FIPS
    heap = ctx->hmac.heap;
#endif

    if (type) {
        WOLFSSL_MSG("init has type");

#ifndef NO_MD5
        if (XSTRNCMP(type, "MD5", 3) == 0) {
            WOLFSSL_MSG("md5 hmac");
            ctx->type = WC_MD5;
        }
        else
#endif
#ifdef WOLFSSL_SHA224
        if (XSTRNCMP(type, "SHA224", 6) == 0) {
            WOLFSSL_MSG("sha224 hmac");
            ctx->type = WC_SHA224;
        }
        else
#endif
#ifndef NO_SHA256
        if (XSTRNCMP(type, "SHA256", 6) == 0) {
            WOLFSSL_MSG("sha256 hmac");
            ctx->type = WC_SHA256;
        }
        else
#endif
#ifdef WOLFSSL_SHA384
        if (XSTRNCMP(type, "SHA384", 6) == 0) {
            WOLFSSL_MSG("sha384 hmac");
            ctx->type = WC_SHA384;
        }
        else
#endif
#ifdef WOLFSSL_SHA512
        if (XSTRNCMP(type, "SHA512", 6) == 0) {
            WOLFSSL_MSG("sha512 hmac");
            ctx->type = WC_SHA512;
        }
        else
#endif
#ifdef WOLFSSL_SHA3
    #ifndef WOLFSSL_NOSHA3_224
        if (XSTRNCMP(type, "SHA3_224", 8) == 0) {
            WOLFSSL_MSG("sha3_224 hmac");
            ctx->type = WC_SHA3_224;
        }
        else
    #endif
    #ifndef WOLFSSL_NOSHA3_256
        if (XSTRNCMP(type, "SHA3_256", 8) == 0) {
            WOLFSSL_MSG("sha3_256 hmac");
            ctx->type = WC_SHA3_256;
        } 
        else
    #endif
        if (XSTRNCMP(type, "SHA3_384", 8) == 0) {
            WOLFSSL_MSG("sha3_384 hmac");
            ctx->type = WC_SHA3_384;
        }
        else
    #ifndef WOLFSSL_NOSHA3_512
        if (XSTRNCMP(type, "SHA3_512", 8) == 0) {
            WOLFSSL_MSG("sha3_512 hmac");
            ctx->type = WC_SHA3_512;
        }
        else
    #endif
#endif

#ifndef NO_SHA
        /* has to be last since would pick or 256, 384, or 512 too */
        if (XSTRNCMP(type, "SHA", 3) == 0) {
            WOLFSSL_MSG("sha hmac");
            ctx->type = WC_SHA;
        }
        else
#endif
        {
            WOLFSSL_MSG("bad init type");
            return WOLFSSL_FAILURE;
        }
    }

    /* Check if init has been called before */
    inited = (ctx->hmac.macType != WC_HASH_TYPE_NONE);
    /* Free if needed */
    if (inited) {
        wc_HmacFree(&ctx->hmac);
    }
    if (key != NULL) {
        WOLFSSL_MSG("keying hmac");

        if (wc_HmacInit(&ctx->hmac, NULL, INVALID_DEVID) == 0) {
            hmac_error = wc_HmacSetKey(&ctx->hmac, ctx->type, (const byte*)key,
                                       (word32)keylen);
            if (hmac_error < 0){
                wc_HmacFree(&ctx->hmac);
                return WOLFSSL_FAILURE;
            }
            XMEMCPY((byte *)&ctx->save_ipad, (byte *)&ctx->hmac.ipad,
                                        WC_HMAC_BLOCK_SIZE);
            XMEMCPY((byte *)&ctx->save_opad, (byte *)&ctx->hmac.opad,
                                        WC_HMAC_BLOCK_SIZE);
        }
        /* OpenSSL compat, no error */
    }
    else if (!inited) {
        return WOLFSSL_FAILURE;
    }
    else if (ctx->type >= 0) { /* MD5 == 0 */
        WOLFSSL_MSG("recover hmac");
        if (wc_HmacInit(&ctx->hmac, NULL, INVALID_DEVID) == 0) {
            ctx->hmac.macType = (byte)ctx->type;
            ctx->hmac.innerHashKeyed = 0;
            XMEMCPY((byte *)&ctx->hmac.ipad, (byte *)&ctx->save_ipad,
                                       WC_HMAC_BLOCK_SIZE);
            XMEMCPY((byte *)&ctx->hmac.opad, (byte *)&ctx->save_opad,
                                       WC_HMAC_BLOCK_SIZE);
            if ((hmac_error = _HMAC_Init(&ctx->hmac, ctx->hmac.macType, heap))
                    !=0) {
               return hmac_error;
            }
        }
    }

    (void)hmac_error;

    return WOLFSSL_SUCCESS;
}


int wolfSSL_HMAC_Update(WOLFSSL_HMAC_CTX* ctx, const unsigned char* data,
                    int len)
{
    int hmac_error = 0;

    WOLFSSL_MSG("wolfSSL_HMAC_Update");

    if (ctx == NULL) {
        WOLFSSL_MSG("no ctx");
        return WOLFSSL_FAILURE;
    }

    if (data) {
        WOLFSSL_MSG("updating hmac");
        hmac_error = wc_HmacUpdate(&ctx->hmac, data, (word32)len);
        if (hmac_error < 0){
            WOLFSSL_MSG("hmac update error");
            return WOLFSSL_FAILURE;
        }
    }

    return WOLFSSL_SUCCESS;
}


int wolfSSL_HMAC_Final(WOLFSSL_HMAC_CTX* ctx, unsigned char* hash,
                   unsigned int* len)
{
    int hmac_error;

    WOLFSSL_MSG("wolfSSL_HMAC_Final");

    /* "len" parameter is optional. */
    if (ctx == NULL || hash == NULL) {
        WOLFSSL_MSG("invalid parameter");
        return WOLFSSL_FAILURE;
    }

    WOLFSSL_MSG("final hmac");
    hmac_error = wc_HmacFinal(&ctx->hmac, hash);
    if (hmac_error < 0){
        WOLFSSL_MSG("final hmac error");
        return WOLFSSL_FAILURE;
    }

    if (len) {
        WOLFSSL_MSG("setting output len");
        switch (ctx->type) {
            #ifndef NO_MD5
            case WC_MD5:
                *len = WC_MD5_DIGEST_SIZE;
                break;
            #endif

            #ifndef NO_SHA
            case WC_SHA:
                *len = WC_SHA_DIGEST_SIZE;
                break;
            #endif

            #ifdef WOLFSSL_SHA224
            case WC_SHA224:
                *len = WC_SHA224_DIGEST_SIZE;
                break;
            #endif

            #ifndef NO_SHA256
            case WC_SHA256:
                *len = WC_SHA256_DIGEST_SIZE;
                break;
            #endif

            #ifdef WOLFSSL_SHA384
            case WC_SHA384:
                *len = WC_SHA384_DIGEST_SIZE;
                break;
            #endif

            #ifdef WOLFSSL_SHA512
            case WC_SHA512:
                *len = WC_SHA512_DIGEST_SIZE;
                break;
            #endif

        #ifdef WOLFSSL_SHA3
            #ifndef WOLFSSL_NOSHA3_224
            case WC_SHA3_224:
                *len = WC_SHA3_224_DIGEST_SIZE;
                break;
            #endif
            #ifndef WOLFSSL_NOSHA3_256
            case WC_SHA3_256:
                *len = WC_SHA3_256_DIGEST_SIZE;
                break;
            #endif
            #ifndef WOLFSSL_NOSHA3_384
            case WC_SHA3_384:
                *len = WC_SHA3_384_DIGEST_SIZE;
                break;
            #endif
            #ifndef WOLFSSL_NOSHA3_512
            case WC_SHA3_512:
                *len = WC_SHA3_512_DIGEST_SIZE;
                break;
            #endif
        #endif

            default:
                WOLFSSL_MSG("bad hmac type");
                return WOLFSSL_FAILURE;
        }
    }

    return WOLFSSL_SUCCESS;
}


int wolfSSL_HMAC_cleanup(WOLFSSL_HMAC_CTX* ctx)
{
    WOLFSSL_MSG("wolfSSL_HMAC_cleanup");

    if (ctx) {
        wc_HmacFree(&ctx->hmac);
    }

    return WOLFSSL_SUCCESS;
}

void wolfSSL_HMAC_CTX_cleanup(WOLFSSL_HMAC_CTX* ctx)
{
    if (ctx) {
        wolfSSL_HMAC_cleanup(ctx);
    }
}

void wolfSSL_HMAC_CTX_free(WOLFSSL_HMAC_CTX* ctx)
{
    if (ctx) {
        wolfSSL_HMAC_CTX_cleanup(ctx);
        XFREE(ctx, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}

size_t wolfSSL_HMAC_size(const WOLFSSL_HMAC_CTX *ctx)
{
    if (!ctx) {
        return 0;
    }

    return (size_t)wc_HashGetDigestSize((enum wc_HashType)ctx->hmac.macType);
}

#ifndef NO_DES3

void wolfSSL_3des_iv(WOLFSSL_EVP_CIPHER_CTX* ctx, int doset,
                            unsigned char* iv, int len)
{
    (void)len;

    WOLFSSL_MSG("wolfSSL_3des_iv");

    if (ctx == NULL || iv == NULL) {
        WOLFSSL_MSG("Bad function argument");
        return;
    }

    if (doset)
        wc_Des3_SetIV(&ctx->cipher.des3, iv);  /* OpenSSL compat, no ret */
    else
        XMEMCPY(iv, &ctx->cipher.des3.reg, DES_BLOCK_SIZE);
}

#endif /* NO_DES3 */


#ifndef NO_AES

void wolfSSL_aes_ctr_iv(WOLFSSL_EVP_CIPHER_CTX* ctx, int doset,
                      unsigned char* iv, int len)
{
    (void)len;

    WOLFSSL_MSG("wolfSSL_aes_ctr_iv");

    if (ctx == NULL || iv == NULL) {
        WOLFSSL_MSG("Bad function argument");
        return;
    }

    if (doset)
       (void)wc_AesSetIV(&ctx->cipher.aes, iv);  /* OpenSSL compat, no ret */
    else
        XMEMCPY(iv, &ctx->cipher.aes.reg, AES_BLOCK_SIZE);
}

#endif /* NO_AES */


/* Free the dynamically allocated data.
 *
 * p  Pointer to dynamically allocated memory.
 */
void wolfSSL_OPENSSL_free(void* p)
{
    WOLFSSL_MSG("wolfSSL_OPENSSL_free");

    XFREE(p, NULL, DYNAMIC_TYPE_OPENSSL);
}

void *wolfSSL_OPENSSL_malloc(size_t a)
{
    return (void *)XMALLOC(a, NULL, DYNAMIC_TYPE_OPENSSL);
}

int wolfSSL_OPENSSL_hexchar2int(unsigned char c)
{
    int ret = -1;

    if ('0' <= c && c <= '9') {
        ret = c - '0';
    }
    else if ('a' <= c && c <= 'f') {
        ret = c - 'a' + 0x0a;
    }
    else if ('A' <= c && c <= 'F') {
        ret = c - 'A' + 0x0a;
    }

    return ret;
}

unsigned char *wolfSSL_OPENSSL_hexstr2buf(const char *str, long *len)
{
    unsigned char* targetBuf;
    int srcDigitHigh = 0;
    int srcDigitLow = 0;
    size_t srcLen;
    size_t srcIdx = 0;
    long targetIdx = 0;

    srcLen = XSTRLEN(str);
    targetBuf = (unsigned char*)XMALLOC(srcLen / 2, NULL, DYNAMIC_TYPE_OPENSSL);
    if (targetBuf == NULL) {
        return NULL;
    }

    while (srcIdx < srcLen) {
        if (str[srcIdx] == ':') {
            srcIdx++;
            continue;
        }

        srcDigitHigh = wolfSSL_OPENSSL_hexchar2int(str[srcIdx++]);
        srcDigitLow = wolfSSL_OPENSSL_hexchar2int(str[srcIdx++]);
        if (srcDigitHigh < 0 || srcDigitLow < 0) {
            WOLFSSL_MSG("Invalid hex character.");
            XFREE(targetBuf, NULL, DYNAMIC_TYPE_OPENSSL);
            return NULL;
        }

        targetBuf[targetIdx++] = (unsigned char)((srcDigitHigh << 4) | srcDigitLow);
    }

    if (len != NULL)
        *len = targetIdx;

    return targetBuf;
}

int wolfSSL_OPENSSL_init_ssl(word64 opts, const OPENSSL_INIT_SETTINGS *settings)
{
    (void)opts;
    (void)settings;
    return wolfSSL_library_init();
}

int wolfSSL_OPENSSL_init_crypto(word64 opts, const OPENSSL_INIT_SETTINGS* settings)
{
    (void)opts;
    (void)settings;
    return wolfSSL_library_init();
}

#if defined(WOLFSSL_KEY_GEN) && defined(WOLFSSL_PEM_TO_DER)

static int EncryptDerKey(byte *der, int *derSz, const EVP_CIPHER* cipher,
                         unsigned char* passwd, int passwdSz, byte **cipherInfo,
                         int maxDerSz)
{
    int ret, paddingSz;
    word32 idx, cipherInfoSz;
#ifdef WOLFSSL_SMALL_STACK
    EncryptedInfo* info = NULL;
#else
    EncryptedInfo  info[1];
#endif

    WOLFSSL_ENTER("EncryptDerKey");

    if (der == NULL || derSz == NULL || cipher == NULL ||
        passwd == NULL || cipherInfo == NULL)
        return BAD_FUNC_ARG;

#ifdef WOLFSSL_SMALL_STACK
    info = (EncryptedInfo*)XMALLOC(sizeof(EncryptedInfo), NULL,
                                   DYNAMIC_TYPE_ENCRYPTEDINFO);
    if (info == NULL) {
        WOLFSSL_MSG("malloc failed");
        return WOLFSSL_FAILURE;
    }
#endif

    XMEMSET(info, 0, sizeof(EncryptedInfo));

    /* set the cipher name on info */
    XSTRNCPY(info->name, cipher, NAME_SZ-1);
    info->name[NAME_SZ-1] = '\0'; /* null term */

    ret = wc_EncryptedInfoGet(info, info->name);
    if (ret != 0) {
        WOLFSSL_MSG("unsupported cipher");
    #ifdef WOLFSSL_SMALL_STACK
        XFREE(info, NULL, DYNAMIC_TYPE_ENCRYPTEDINFO);
    #endif
        return WOLFSSL_FAILURE;
    }

    /* Generate a random salt */
    if (wolfSSL_RAND_bytes(info->iv, info->ivSz) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("generate iv failed");
#ifdef WOLFSSL_SMALL_STACK
        XFREE(info, NULL, DYNAMIC_TYPE_ENCRYPTEDINFO);
#endif
        return WOLFSSL_FAILURE;
    }

    /* add the padding before encryption */
    paddingSz = ((*derSz)/info->ivSz + 1) * info->ivSz - (*derSz);
    if (paddingSz == 0)
        paddingSz = info->ivSz;
    if (maxDerSz < *derSz + paddingSz) {
        WOLFSSL_MSG("not enough DER buffer allocated");
#ifdef WOLFSSL_SMALL_STACK
        XFREE(info, NULL, DYNAMIC_TYPE_ENCRYPTEDINFO);
#endif
        return WOLFSSL_FAILURE;
    }
    XMEMSET(der+(*derSz), (byte)paddingSz, paddingSz);
    (*derSz) += paddingSz;

    /* encrypt buffer */
    if (wc_BufferKeyEncrypt(info, der, *derSz, passwd, passwdSz, WC_MD5) != 0) {
        WOLFSSL_MSG("encrypt key failed");
#ifdef WOLFSSL_SMALL_STACK
        XFREE(info, NULL, DYNAMIC_TYPE_ENCRYPTEDINFO);
#endif
        return WOLFSSL_FAILURE;
    }

    /* create cipher info : 'cipher_name,Salt(hex)' */
    cipherInfoSz = (word32)(2*info->ivSz + XSTRLEN(info->name) + 2);
    *cipherInfo = (byte*)XMALLOC(cipherInfoSz, NULL,
                                DYNAMIC_TYPE_STRING);
    if (*cipherInfo == NULL) {
        WOLFSSL_MSG("malloc failed");
#ifdef WOLFSSL_SMALL_STACK
        XFREE(info, NULL, DYNAMIC_TYPE_ENCRYPTEDINFO);
#endif
        return WOLFSSL_FAILURE;
    }
    XSTRNCPY((char*)*cipherInfo, info->name, cipherInfoSz);
    XSTRNCAT((char*)*cipherInfo, ",", 2);

    idx = (word32)XSTRLEN((char*)*cipherInfo);
    cipherInfoSz -= idx;
    ret = Base16_Encode(info->iv, info->ivSz, *cipherInfo+idx, &cipherInfoSz);

#ifdef WOLFSSL_SMALL_STACK
    XFREE(info, NULL, DYNAMIC_TYPE_ENCRYPTEDINFO);
#endif
    if (ret != 0) {
        WOLFSSL_MSG("Base16_Encode failed");
        XFREE(*cipherInfo, NULL, DYNAMIC_TYPE_STRING);
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}
#endif /* WOLFSSL_KEY_GEN || WOLFSSL_PEM_TO_DER */

#if defined(WOLFSSL_KEY_GEN) && !defined(NO_RSA) && !defined(HAVE_USER_RSA)
static int wolfSSL_RSA_To_Der(WOLFSSL_RSA* rsa, byte** outBuf, int publicKey)
{
    int derSz  = 0;
    int ret;
    byte* derBuf;

    WOLFSSL_ENTER("wolfSSL_RSA_To_Der");

    if (!rsa || (publicKey != 0 && publicKey != 1)) {
        WOLFSSL_LEAVE("wolfSSL_RSA_To_Der", BAD_FUNC_ARG);
        return BAD_FUNC_ARG;
    }

    if (rsa->inSet == 0) {
        if ((ret = SetRsaInternal(rsa)) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetRsaInternal() Failed");
            WOLFSSL_LEAVE("wolfSSL_RSA_To_Der", ret);
            return ret;
        }
    }

    if (publicKey) {
        if ((derSz = wc_RsaPublicKeyDerSize((RsaKey *)rsa->internal, 1)) < 0) {
            WOLFSSL_MSG("wc_RsaPublicKeyDerSize failed");
            WOLFSSL_LEAVE("wolfSSL_RSA_To_Der", derSz);
            return derSz;
        }
    }
    else {
        if ((derSz = wc_RsaKeyToDer((RsaKey*)rsa->internal, NULL, 0)) < 0) {
            WOLFSSL_MSG("wc_RsaKeyToDer failed");
            WOLFSSL_LEAVE("wolfSSL_RSA_To_Der", derSz);
            return derSz;
        }
    }

    if (outBuf) {
        if (!(derBuf = (byte*)XMALLOC(derSz, NULL, DYNAMIC_TYPE_TMP_BUFFER))) {
            WOLFSSL_MSG("malloc failed");
            WOLFSSL_LEAVE("wolfSSL_RSA_To_Der", MEMORY_ERROR);
            return MEMORY_ERROR;
        }

        /* Key to DER */
        if (publicKey) {
            derSz = wc_RsaKeyToPublicDer((RsaKey*)rsa->internal, derBuf, derSz);
        }
        else {
            derSz = wc_RsaKeyToDer((RsaKey*)rsa->internal, derBuf, derSz);
        }

        if (derSz < 0) {
            WOLFSSL_MSG("wc_RsaKeyToPublicDer failed");
            XFREE(derBuf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        }
        else {
            if (*outBuf) {
                XMEMCPY(*outBuf, derBuf, derSz);
                XFREE(derBuf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            }
            else {
                *outBuf = derBuf;
            }
        }
    }

    WOLFSSL_LEAVE("wolfSSL_RSA_To_Der", derSz);
    return derSz;
}
#endif

#ifndef NO_BIO
#if (defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)) && !defined(NO_RSA)
/* Takes a WOLFSSL_RSA key and writes it out to a WOLFSSL_BIO
 *
 * bio    the WOLFSSL_BIO to write to
 * key    the WOLFSSL_RSA key to write out
 * cipher cipher used
 * passwd password string if used
 * len    length of password string
 * cb     password callback to use
 * arg    null terminated string for passphrase
 */
int wolfSSL_PEM_write_bio_RSAPrivateKey(WOLFSSL_BIO* bio, WOLFSSL_RSA* key,
                                        const WOLFSSL_EVP_CIPHER* cipher,
                                        unsigned char* passwd, int len,
                                        pem_password_cb* cb, void* arg)
{
    int ret;
    WOLFSSL_EVP_PKEY* pkey;

    WOLFSSL_ENTER("wolfSSL_PEM_write_bio_RSAPrivateKey");

    if (bio == NULL || key == NULL) {
        WOLFSSL_MSG("Bad Function Arguments");
        return WOLFSSL_FAILURE;
    }

    pkey = wolfSSL_EVP_PKEY_new_ex(bio->heap);
    if (pkey == NULL) {
        WOLFSSL_MSG("wolfSSL_EVP_PKEY_new_ex failed");
        return WOLFSSL_FAILURE;
    }

    pkey->type   = EVP_PKEY_RSA;
    pkey->rsa    = key;
    pkey->ownRsa = 0;
#if defined(WOLFSSL_KEY_GEN) && !defined(NO_RSA) && !defined(HAVE_USER_RSA)
    /* similar to how wolfSSL_PEM_write_mem_RSAPrivateKey finds DER of key */
    {
        int derSz;
        byte* derBuf = NULL;

        if ((derSz = wolfSSL_RSA_To_Der(key, &derBuf, 0)) < 0) {
            WOLFSSL_MSG("wolfSSL_RSA_To_Der failed");
            return WOLFSSL_FAILURE;
        }

        if (derBuf == NULL) {
            WOLFSSL_MSG("wolfSSL_RSA_To_Der failed to get buffer");
            return WOLFSSL_FAILURE;
        }

        pkey->pkey.ptr = (char*)XMALLOC(derSz, bio->heap,
                DYNAMIC_TYPE_TMP_BUFFER);
        if (pkey->pkey.ptr == NULL) {
            WOLFSSL_MSG("key malloc failed");
            XFREE(derBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
            wolfSSL_EVP_PKEY_free(pkey);
            return WOLFSSL_FAILURE;
        }
        pkey->pkey_sz = derSz;
        XMEMCPY(pkey->pkey.ptr, derBuf, derSz);
        XFREE(derBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    }
#endif

    ret = wolfSSL_PEM_write_bio_PrivateKey(bio, pkey, cipher, passwd, len,
                                        cb, arg);

    wolfSSL_EVP_PKEY_free(pkey);

    return ret;
}

#if defined(WOLFSSL_KEY_GEN) && !defined(NO_RSA) && !defined(HAVE_USER_RSA)
/* Takes an RSA public key and writes it out to a WOLFSSL_BIO
 * Returns WOLFSSL_SUCCESS or WOLFSSL_FAILURE
 */
int wolfSSL_PEM_write_bio_RSA_PUBKEY(WOLFSSL_BIO* bio, WOLFSSL_RSA* rsa)
{
    int ret = 0, derSz = 0;
    byte *derBuf = NULL;
    WOLFSSL_EVP_PKEY* pkey = NULL;

    WOLFSSL_ENTER("wolfSSL_PEM_write_bio_RSA_PUBKEY");

    if (bio == NULL || rsa == NULL) {
        WOLFSSL_MSG("Bad Function Arguments");
        return WOLFSSL_FAILURE;
    }

    /* Initialize pkey structure */
    pkey = wolfSSL_EVP_PKEY_new_ex(bio->heap);
    if (pkey == NULL) {
        WOLFSSL_MSG("wolfSSL_EVP_PKEY_new_ex failed");
        return WOLFSSL_FAILURE;
    }

    pkey->type   = EVP_PKEY_RSA;
    pkey->rsa    = rsa;
    pkey->ownRsa = 0;

    if ((derSz = wolfSSL_RSA_To_Der(rsa, &derBuf, 1)) < 0) {
        WOLFSSL_MSG("wolfSSL_RSA_To_Der failed");
        return WOLFSSL_FAILURE;
    }

    if (derBuf == NULL) {
        WOLFSSL_MSG("wolfSSL_RSA_To_Der failed to get buffer");
        return WOLFSSL_FAILURE;
    }

    pkey->pkey.ptr = (char*)XMALLOC(derSz, bio->heap,
            DYNAMIC_TYPE_TMP_BUFFER);
    if (pkey->pkey.ptr == NULL) {
        WOLFSSL_MSG("key malloc failed");
        XFREE(derBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }
    pkey->pkey_sz = derSz;
    XMEMCPY(pkey->pkey.ptr, derBuf, derSz);
    XFREE(derBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    ret = wolfSSL_PEM_write_bio_PUBKEY(bio, pkey);
    wolfSSL_EVP_PKEY_free(pkey);

    return ret;
}
#endif


/* Reads an RSA public key from a WOLFSSL_BIO into a WOLFSSL_RSA
 * Returns WOLFSSL_SUCCESS or WOLFSSL_FAILURE
 */
WOLFSSL_RSA *wolfSSL_PEM_read_bio_RSA_PUBKEY(WOLFSSL_BIO* bio,WOLFSSL_RSA** rsa,
                                                pem_password_cb* cb, void *pass)
{
    WOLFSSL_EVP_PKEY* pkey;
    WOLFSSL_RSA* local;

    WOLFSSL_ENTER("wolfSSL_PEM_read_bio_RSA_PUBKEY");

    pkey = wolfSSL_PEM_read_bio_PUBKEY(bio, NULL, cb, pass);
    if (pkey == NULL) {
        return NULL;
    }

    /* Since the WOLFSSL_RSA structure is being taken from WOLFSSL_EVP_PKEY the
     * flag indicating that the WOLFSSL_RSA structure is owned should be FALSE
     * to avoid having it free'd */
    pkey->ownRsa = 0;
    local = pkey->rsa;
    if (rsa != NULL){
        *rsa = local;
    }

    wolfSSL_EVP_PKEY_free(pkey);
    return local;
}

#endif /* defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL) && !defined(NO_RSA) */

/* Takes a public key and writes it out to a WOLFSSL_BIO
 * Returns WOLFSSL_SUCCESS or WOLFSSL_FAILURE
 */
int wolfSSL_PEM_write_bio_PUBKEY(WOLFSSL_BIO* bio, WOLFSSL_EVP_PKEY* key)
{
    byte* keyDer;
    int pemSz;
    int ret;
    byte* tmp;

    WOLFSSL_ENTER("wolfSSL_PEM_write_bio_PUBKEY");

    if (bio == NULL || key == NULL) {
        return WOLFSSL_FAILURE;
    }

    keyDer = (byte*)key->pkey.ptr;

    pemSz = wc_DerToPem(keyDer, key->pkey_sz, NULL, 0, PUBLICKEY_TYPE);
    if (pemSz < 0) {
        WOLFSSL_LEAVE("wolfSSL_PEM_write_bio_PUBKEY", pemSz);
        return WOLFSSL_FAILURE;
    }
    tmp = (byte*)XMALLOC(pemSz, bio->heap, DYNAMIC_TYPE_OPENSSL);
    if (tmp == NULL) {
        return MEMORY_E;
    }

    ret = wc_DerToPemEx(keyDer, key->pkey_sz, tmp, pemSz,
                        NULL, PUBLICKEY_TYPE);
    if (ret < 0) {
        WOLFSSL_LEAVE("wolfSSL_PEM_write_bio_PUBKEY", ret);
        XFREE(tmp, bio->heap, DYNAMIC_TYPE_OPENSSL);
        return WOLFSSL_FAILURE;
    }

    ret = wolfSSL_BIO_write(bio, tmp, pemSz);
    XFREE(tmp, bio->heap, DYNAMIC_TYPE_OPENSSL);
    if (ret != pemSz) {
        WOLFSSL_MSG("Unable to write full PEM to BIO");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

/* Takes a private key and writes it out to a WOLFSSL_BIO
 * Returns WOLFSSL_SUCCESS or WOLFSSL_FAILURE
 */
int wolfSSL_PEM_write_bio_PrivateKey(WOLFSSL_BIO* bio, WOLFSSL_EVP_PKEY* key,
                                        const WOLFSSL_EVP_CIPHER* cipher,
                                        unsigned char* passwd, int len,
                                        pem_password_cb* cb, void* arg)
{
    byte* keyDer;
    int pemSz;
    int type;
    int ret;
    byte* tmp;

    (void)cipher;
    (void)passwd;
    (void)len;
    (void)cb;
    (void)arg;

    WOLFSSL_ENTER("wolfSSL_PEM_write_bio_PrivateKey");

    if (bio == NULL || key == NULL) {
        WOLFSSL_MSG("Bad Function Arguments");
        return WOLFSSL_FAILURE;
    }

    keyDer = (byte*)key->pkey.ptr;

    switch (key->type) {
#ifndef NO_RSA
        case EVP_PKEY_RSA:
            type = PRIVATEKEY_TYPE;
            break;
#endif

#ifndef NO_DSA
        case EVP_PKEY_DSA:
            type = DSA_PRIVATEKEY_TYPE;
            break;
#endif

#ifdef HAVE_ECC
        case EVP_PKEY_EC:
            type = ECC_PRIVATEKEY_TYPE;
            break;
#endif

#if !defined(NO_DH) && (defined(WOLFSSL_QT) || defined(OPENSSL_ALL))
        case EVP_PKEY_DH:
            type = DH_PRIVATEKEY_TYPE;
            break;
#endif

        default:
            WOLFSSL_MSG("Unknown Key type!");
            type = PRIVATEKEY_TYPE;
    }

    pemSz = wc_DerToPem(keyDer, key->pkey_sz, NULL, 0, type);
    if (pemSz < 0) {
        WOLFSSL_LEAVE("wolfSSL_PEM_write_bio_PrivateKey", pemSz);
        return WOLFSSL_FAILURE;
    }
    tmp = (byte*)XMALLOC(pemSz, bio->heap, DYNAMIC_TYPE_OPENSSL);
    if (tmp == NULL) {
        return MEMORY_E;
    }

    ret = wc_DerToPemEx(keyDer, key->pkey_sz, tmp, pemSz,
                                NULL, type);
    if (ret < 0) {
        WOLFSSL_LEAVE("wolfSSL_PEM_write_bio_PrivateKey", ret);
        XFREE(tmp, bio->heap, DYNAMIC_TYPE_OPENSSL);
        return WOLFSSL_FAILURE;
    }

    ret = wolfSSL_BIO_write(bio, tmp, pemSz);
    XFREE(tmp, bio->heap, DYNAMIC_TYPE_OPENSSL);
    if (ret != pemSz) {
        WOLFSSL_MSG("Unable to write full PEM to BIO");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}
#endif /* !NO_BIO */

#if (defined(WOLFSSL_KEY_GEN) && !defined(NO_RSA) && !defined(HAVE_USER_RSA)) && \
    (defined(WOLFSSL_PEM_TO_DER) || defined(WOLFSSL_DER_TO_PEM))

/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_PEM_write_mem_RSAPrivateKey(RSA* rsa, const EVP_CIPHER* cipher,
                                        unsigned char* passwd, int passwdSz,
                                        unsigned char **pem, int *plen)
{
    byte *derBuf = NULL, *tmp, *cipherInfo = NULL;
    int  derSz = 0;
    const int type = PRIVATEKEY_TYPE;
    const char* header = NULL;
    const char* footer = NULL;

    WOLFSSL_ENTER("wolfSSL_PEM_write_mem_RSAPrivateKey");

    if (pem == NULL || plen == NULL || rsa == NULL || rsa->internal == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }

    if (wc_PemGetHeaderFooter(type, &header, &footer) != 0)
        return WOLFSSL_FAILURE;

    if (rsa->inSet == 0) {
        WOLFSSL_MSG("No RSA internal set, do it");

        if (SetRsaInternal(rsa) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetRsaInternal failed");
            return WOLFSSL_FAILURE;
        }
    }

    if ((derSz = wolfSSL_RSA_To_Der(rsa, &derBuf, 0)) < 0) {
        WOLFSSL_MSG("wolfSSL_RSA_To_Der failed");
        return WOLFSSL_FAILURE;
    }

    /* encrypt DER buffer if required */
    if (passwd != NULL && passwdSz > 0 && cipher != NULL) {
        int ret;
        int blockSz = wolfSSL_EVP_CIPHER_block_size(cipher);
        byte *tmpBuf;

        /* Add space for padding */
        if (!(tmpBuf = (byte*)XREALLOC(derBuf, derSz + blockSz, NULL,
                DYNAMIC_TYPE_TMP_BUFFER))) {
            WOLFSSL_MSG("Extending DER buffer failed");
            XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
            return WOLFSSL_FAILURE;
        }
        derBuf = tmpBuf;

        ret = EncryptDerKey(derBuf, &derSz, cipher,
                            passwd, passwdSz, &cipherInfo, derSz + blockSz);
        if (ret != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("EncryptDerKey failed");
            XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
            return ret;
        }

        /* tmp buffer with a max size */
        *plen = (derSz * 2) + (int)XSTRLEN(header) + 1 +
            (int)XSTRLEN(footer) + 1 + HEADER_ENCRYPTED_KEY_SIZE;
    }
    else {
        /* tmp buffer with a max size */
        *plen = (derSz * 2) + (int)XSTRLEN(header) + 1 +
            (int)XSTRLEN(footer) + 1;
    }

    tmp = (byte*)XMALLOC(*plen, NULL, DYNAMIC_TYPE_PEM);
    if (tmp == NULL) {
        WOLFSSL_MSG("malloc failed");
        XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
        if (cipherInfo != NULL)
            XFREE(cipherInfo, NULL, DYNAMIC_TYPE_STRING);
        return WOLFSSL_FAILURE;
    }

    /* DER to PEM */
    *plen = wc_DerToPemEx(derBuf, derSz, tmp, *plen, cipherInfo, type);
    if (*plen <= 0) {
        WOLFSSL_MSG("wc_DerToPemEx failed");
        XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
        XFREE(tmp, NULL, DYNAMIC_TYPE_PEM);
        if (cipherInfo != NULL)
            XFREE(cipherInfo, NULL, DYNAMIC_TYPE_STRING);
        return WOLFSSL_FAILURE;
    }
    XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
    if (cipherInfo != NULL)
        XFREE(cipherInfo, NULL, DYNAMIC_TYPE_STRING);

    *pem = (byte*)XMALLOC((*plen)+1, NULL, DYNAMIC_TYPE_KEY);
    if (*pem == NULL) {
        WOLFSSL_MSG("malloc failed");
        XFREE(tmp, NULL, DYNAMIC_TYPE_PEM);
        return WOLFSSL_FAILURE;
    }
    XMEMSET(*pem, 0, (*plen)+1);

    if (XMEMCPY(*pem, tmp, *plen) == NULL) {
        WOLFSSL_MSG("XMEMCPY failed");
        XFREE(pem, NULL, DYNAMIC_TYPE_KEY);
        XFREE(tmp, NULL, DYNAMIC_TYPE_PEM);
        return WOLFSSL_FAILURE;
    }
    XFREE(tmp, NULL, DYNAMIC_TYPE_PEM);

    return WOLFSSL_SUCCESS;
}


#ifndef NO_FILESYSTEM
/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_PEM_write_RSAPrivateKey(XFILE fp, WOLFSSL_RSA *rsa,
                                    const EVP_CIPHER *enc,
                                    unsigned char *kstr, int klen,
                                    pem_password_cb *cb, void *u)
{
    byte *pem;
    int  plen, ret;

    (void)cb;
    (void)u;

    WOLFSSL_MSG("wolfSSL_PEM_write_RSAPrivateKey");

    if (fp == XBADFILE || rsa == NULL || rsa->internal == NULL)
    {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }

    ret = wolfSSL_PEM_write_mem_RSAPrivateKey(rsa, enc, kstr, klen, &pem, &plen);
    if (ret != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("wolfSSL_PEM_write_mem_RSAPrivateKey failed");
        return WOLFSSL_FAILURE;
    }

    ret = (int)XFWRITE(pem, plen, 1, fp);
    if (ret != 1) {
        WOLFSSL_MSG("RSA private key file write failed");
        return WOLFSSL_FAILURE;
    }

    XFREE(pem, NULL, DYNAMIC_TYPE_KEY);
    return WOLFSSL_SUCCESS;
}
#endif /* NO_FILESYSTEM */
#endif /* WOLFSSL_KEY_GEN && !NO_RSA && !HAVE_USER_RSA && WOLFSSL_PEM_TO_DER */

/* Colon separated list of <public key>+<digest> algorithms.
 * Replaces list in context.
 */
int wolfSSL_CTX_set1_sigalgs_list(WOLFSSL_CTX* ctx, const char* list)
{
    WOLFSSL_MSG("wolfSSL_CTX_set1_sigalg_list");

    if (ctx == NULL || list == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }

    /* alloc/init on demand only */
    if (ctx->suites == NULL) {
        ctx->suites = (Suites*)XMALLOC(sizeof(Suites), ctx->heap,
                                       DYNAMIC_TYPE_SUITES);
        if (ctx->suites == NULL) {
            WOLFSSL_MSG("Memory alloc for Suites failed");
            return WOLFSSL_FAILURE;
        }
        XMEMSET(ctx->suites, 0, sizeof(Suites));
    }

    return SetSuitesHashSigAlgo(ctx->suites, list);
}

/* Colon separated list of <public key>+<digest> algorithms.
 * Replaces list in SSL.
 */
int wolfSSL_set1_sigalgs_list(WOLFSSL* ssl, const char* list)
{
    WOLFSSL_MSG("wolfSSL_set1_sigalg_list");

    if (ssl == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }

#ifdef SINGLE_THREADED
    if (ssl->ctx->suites == ssl->suites) {
        ssl->suites = (Suites*)XMALLOC(sizeof(Suites), ssl->heap,
                                       DYNAMIC_TYPE_SUITES);
        if (ssl->suites == NULL) {
            WOLFSSL_MSG("Suites Memory error");
            return MEMORY_E;
        }
        *ssl->suites = *ssl->ctx->suites;
        ssl->options.ownSuites = 1;
    }
#endif
    if (ssl == NULL || list == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }

    return SetSuitesHashSigAlgo(ssl->suites, list);
}

struct WOLFSSL_HashSigInfo {
    int hashAlgo;
    int sigAlgo;
    int nid;
}  wolfssl_hash_sig_info[] =
{
#ifndef NO_RSA
    #ifndef NO_SHA256
        { sha256_mac, rsa_sa_algo, CTC_SHA256wRSA },
    #endif
    #ifdef WOLFSSL_SHA384
        { sha384_mac, rsa_sa_algo, CTC_SHA384wRSA },
    #endif
    #ifdef WOLFSSL_SHA512
        { sha512_mac, rsa_sa_algo, CTC_SHA512wRSA },
    #endif
    #ifdef WOLFSSL_SHA224
        { sha224_mac, rsa_sa_algo, CTC_SHA224wRSA },
    #endif
    #ifndef NO_SHA
        { sha_mac,    rsa_sa_algo, CTC_SHAwRSA    },
    #endif
    #ifdef WC_RSA_PSS
        #ifndef NO_SHA256
            { sha256_mac, rsa_pss_sa_algo, CTC_SHA256wRSA },
        #endif
        #ifdef WOLFSSL_SHA384
            { sha384_mac, rsa_pss_sa_algo, CTC_SHA384wRSA },
        #endif
        #ifdef WOLFSSL_SHA512
            { sha512_mac, rsa_pss_sa_algo, CTC_SHA512wRSA },
        #endif
        #ifdef WOLFSSL_SHA224
            { sha224_mac, rsa_pss_sa_algo, CTC_SHA224wRSA },
        #endif
    #endif
#endif
#ifdef HAVE_ECC
    #ifndef NO_SHA256
        { sha256_mac, ecc_dsa_sa_algo, CTC_SHA256wECDSA },
    #endif
    #ifdef WOLFSSL_SHA384
        { sha384_mac, ecc_dsa_sa_algo, CTC_SHA384wECDSA },
    #endif
    #ifdef WOLFSSL_SHA512
        { sha512_mac, ecc_dsa_sa_algo, CTC_SHA512wECDSA },
    #endif
    #ifdef WOLFSSL_SHA224
        { sha224_mac, ecc_dsa_sa_algo, CTC_SHA224wECDSA },
    #endif
    #ifndef NO_SHA
        { sha_mac,    ecc_dsa_sa_algo, CTC_SHAwECDSA    },
    #endif
#endif
#ifdef HAVE_ED25519
    { no_mac, ed25519_sa_algo, CTC_ED25519 },
#endif
#ifdef HAVE_ED25519
    { no_mac, ed448_sa_algo,   CTC_ED448   },
#endif
#ifndef NO_DSA
    #ifndef NO_SHA
        { sha_mac,    dsa_sa_algo, CTC_SHAwDSA    },
    #endif
#endif
};
#define WOLFSSL_HASH_SIG_INFO_SZ \
    (int)(sizeof(wolfssl_hash_sig_info)/sizeof(*wolfssl_hash_sig_info))

int wolfSSL_get_signature_nid(WOLFSSL *ssl, int* nid)
{
    int i;
    int ret = WOLFSSL_FAILURE;

    WOLFSSL_MSG("wolfSSL_get_signature_nid");

    if (ssl == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }

    for (i = 0; i < WOLFSSL_HASH_SIG_INFO_SZ; i++) {
        if (ssl->suites->hashAlgo == wolfssl_hash_sig_info[i].hashAlgo &&
                     ssl->suites->sigAlgo == wolfssl_hash_sig_info[i].sigAlgo) {
            *nid = wolfssl_hash_sig_info[i].nid;
            ret = WOLFSSL_SUCCESS;
            break;
        }
    }

    return ret;
}

#ifdef HAVE_ECC

#ifdef ALT_ECC_SIZE
static int SetIndividualInternalEcc(WOLFSSL_BIGNUM* bn, mp_int* mpi)
{
    WOLFSSL_MSG("Entering SetIndividualInternal");

    if (bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (mpi == NULL) {
        WOLFSSL_MSG("mpi NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (mp_copy((mp_int*)bn->internal, mpi) != MP_OKAY) {
        WOLFSSL_MSG("mp_copy error");
        return WOLFSSL_FATAL_ERROR;
    }

    return WOLFSSL_SUCCESS;
}
#endif /* ALT_ECC_SIZE */

/* EC_POINT Openssl -> WolfSSL */
static int SetECPointInternal(WOLFSSL_EC_POINT *p)
{
    ecc_point* point;
    WOLFSSL_ENTER("SetECPointInternal");

    if (p == NULL || p->internal == NULL) {
        WOLFSSL_MSG("ECPoint NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    point = (ecc_point*)p->internal;

#ifndef ALT_ECC_SIZE
    if (p->X != NULL && SetIndividualInternal(p->X, point->x) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("ecc point X error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (p->Y != NULL && SetIndividualInternal(p->Y, point->y) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("ecc point Y error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (p->Z != NULL && SetIndividualInternal(p->Z, point->z) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("ecc point Z error");
        return WOLFSSL_FATAL_ERROR;
    }
#else
    if (p->X != NULL && SetIndividualInternalEcc(p->X, point->x) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("ecc point X error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (p->Y != NULL && SetIndividualInternalEcc(p->Y, point->y) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("ecc point Y error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (p->Z != NULL && SetIndividualInternalEcc(p->Z, point->z) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("ecc point Z error");
        return WOLFSSL_FATAL_ERROR;
    }
#endif

    p->inSet = 1;

    return WOLFSSL_SUCCESS;
}

/* EC_POINT WolfSSL -> OpenSSL */
static int SetECPointExternal(WOLFSSL_EC_POINT *p)
{
    ecc_point* point;

    WOLFSSL_ENTER("SetECPointExternal");

    if (p == NULL || p->internal == NULL) {
        WOLFSSL_MSG("ECPoint NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    point = (ecc_point*)p->internal;

    if (SetIndividualExternal(&p->X, point->x) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("ecc point X error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (SetIndividualExternal(&p->Y, point->y) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("ecc point Y error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (SetIndividualExternal(&p->Z, point->z) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("ecc point Z error");
        return WOLFSSL_FATAL_ERROR;
    }

    p->exSet = 1;

    return WOLFSSL_SUCCESS;
}


/* EC_KEY wolfSSL -> OpenSSL */
int SetECKeyExternal(WOLFSSL_EC_KEY* eckey)
{
    ecc_key* key;

    WOLFSSL_ENTER("SetECKeyExternal");

    if (eckey == NULL || eckey->internal == NULL) {
        WOLFSSL_MSG("ec key NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    key = (ecc_key*)eckey->internal;

    /* set group (OID, nid and idx) */
    eckey->group->curve_oid = ecc_sets[key->idx].oidSum;
    eckey->group->curve_nid = EccEnumToNID(ecc_sets[key->idx].id);
    eckey->group->curve_idx = key->idx;

    if (eckey->pub_key->internal != NULL) {
        /* set the internal public key */
        if (wc_ecc_copy_point(&key->pubkey,
                             (ecc_point*)eckey->pub_key->internal) != MP_OKAY) {
            WOLFSSL_MSG("SetECKeyExternal ecc_copy_point failed");
            return WOLFSSL_FATAL_ERROR;
        }

        /* set the external pubkey (point) */
        if (SetECPointExternal(eckey->pub_key) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetECKeyExternal SetECPointExternal failed");
            return WOLFSSL_FATAL_ERROR;
        }
    }

    /* set the external privkey */
    if (key->type == ECC_PRIVATEKEY) {
        if (SetIndividualExternal(&eckey->priv_key, &key->k) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("ec priv key error");
            return WOLFSSL_FATAL_ERROR;
        }
    }

    eckey->exSet = 1;

    return WOLFSSL_SUCCESS;
}

/* EC_KEY Openssl -> WolfSSL */
int SetECKeyInternal(WOLFSSL_EC_KEY* eckey)
{
    ecc_key* key;

    WOLFSSL_ENTER("SetECKeyInternal");

    if (eckey == NULL || eckey->internal == NULL || eckey->group == NULL) {
        WOLFSSL_MSG("ec key NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    key = (ecc_key*)eckey->internal;

    /* validate group */
    if ((eckey->group->curve_idx < 0) ||
        (wc_ecc_is_valid_idx(eckey->group->curve_idx) == 0)) {
        WOLFSSL_MSG("invalid curve idx");
        return WOLFSSL_FATAL_ERROR;
    }

    /* set group (idx of curve and corresponding domain parameters) */
    key->idx = eckey->group->curve_idx;
    key->dp = &ecc_sets[key->idx];

    /* set pubkey (point) */
    if (eckey->pub_key != NULL) {
        if (SetECPointInternal(eckey->pub_key) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("ec key pub error");
            return WOLFSSL_FATAL_ERROR;
        }

        /* copy over the public point to key */
        if (wc_ecc_copy_point((ecc_point*)eckey->pub_key->internal, &key->pubkey) != MP_OKAY) {
            WOLFSSL_MSG("wc_ecc_copy_point error");
            return WOLFSSL_FATAL_ERROR;
        }

        /* public key */
        key->type = ECC_PUBLICKEY;
    }

    /* set privkey */
    if (eckey->priv_key != NULL) {
        if (SetIndividualInternal(eckey->priv_key, &key->k) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("ec key priv error");
            return WOLFSSL_FATAL_ERROR;
        }

        /* private key */
        key->type = ECC_PRIVATEKEY;
    }

    eckey->inSet = 1;

    return WOLFSSL_SUCCESS;
}

WOLFSSL_EC_POINT *wolfSSL_EC_KEY_get0_public_key(const WOLFSSL_EC_KEY *key)
{
    WOLFSSL_ENTER("wolfSSL_EC_KEY_get0_public_key");

    if (key == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_get0_public_key Bad arguments");
        return NULL;
    }

    return key->pub_key;
}

const WOLFSSL_EC_GROUP *wolfSSL_EC_KEY_get0_group(const WOLFSSL_EC_KEY *key)
{
    WOLFSSL_ENTER("wolfSSL_EC_KEY_get0_group");

    if (key == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_get0_group Bad arguments");
        return NULL;
    }

    return key->group;
}


/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_EC_KEY_set_private_key(WOLFSSL_EC_KEY *key,
                                   const WOLFSSL_BIGNUM *priv_key)
{
    WOLFSSL_ENTER("wolfSSL_EC_KEY_set_private_key");

    if (key == NULL || priv_key == NULL) {
        WOLFSSL_MSG("Bad arguments");
        return WOLFSSL_FAILURE;
    }

    /* free key if previously set */
    if (key->priv_key != NULL)
        wolfSSL_BN_free(key->priv_key);

    key->priv_key = wolfSSL_BN_dup(priv_key);
    if (key->priv_key == NULL) {
        WOLFSSL_MSG("key ecc priv key NULL");
        return WOLFSSL_FAILURE;
    }

    if (SetECKeyInternal(key) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetECKeyInternal failed");
        wolfSSL_BN_free(key->priv_key);
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}


WOLFSSL_BIGNUM *wolfSSL_EC_KEY_get0_private_key(const WOLFSSL_EC_KEY *key)
{
    WOLFSSL_ENTER("wolfSSL_EC_KEY_get0_private_key");

    if (key == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_get0_private_key Bad arguments");
        return NULL;
    }

    if (wolfSSL_BN_is_zero(key->priv_key)) {
        /* return NULL if not set */
        return NULL;
    }

    return key->priv_key;
}

WOLFSSL_EC_KEY *wolfSSL_EC_KEY_new_by_curve_name(int nid)
{
    WOLFSSL_EC_KEY *key;
    int x;
    int eccEnum = NIDToEccEnum(nid);

    WOLFSSL_ENTER("wolfSSL_EC_KEY_new_by_curve_name");

    key = wolfSSL_EC_KEY_new();
    if (key == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_new failure");
        return NULL;
    }

    /* set the nid of the curve */
    key->group->curve_nid = nid;

    if (eccEnum != -1) {
        /* search and set the corresponding internal curve idx */
        for (x = 0; ecc_sets[x].size != 0; x++)
            if (ecc_sets[x].id == eccEnum) {
                key->group->curve_idx = x;
                key->group->curve_oid = ecc_sets[x].oidSum;
                break;
            }
    }

    return key;
}

const char* wolfSSL_EC_curve_nid2nist(int nid)
{
    const WOLF_EC_NIST_NAME* nist_name;
    for (nist_name = kNistCurves; nist_name->name != NULL; nist_name++) {
        if (nist_name->nid == nid) {
            return nist_name->name;
        }
    }
    return NULL;
}

/**
 * return nist curve id
 * @param name nist curve name
 * @return nist curve id when found, 0 when not found
 */
int wolfSSL_EC_curve_nist2nid(const char* name)
{
    const WOLF_EC_NIST_NAME* nist_name;
    for (nist_name = kNistCurves; nist_name->name != NULL; nist_name++) {
        if (XSTRCMP(nist_name->name, name) == 0) {
            return nist_name->nid;
        }
    }
    return 0;
}

#if defined(WOLFSSL_TLS13) && defined(HAVE_SUPPORTED_CURVES)
static int populate_groups(int* groups, int max_count, char *list)
{
    char *end;
    int len;
    int count = 0;
    const WOLF_EC_NIST_NAME* nist_name;

    if (!groups || !list) {
        return -1;
    }

    for (end = list; ; list = ++end) {
        if (count > max_count) {
            WOLFSSL_MSG("Too many curves in list");
            return -1;
        }
        while (*end != ':' && *end != '\0') end++;
        len = (int)(end - list); /* end points to char after end
                                  * of curve name so no need for -1 */
        if ((len < kNistCurves_MIN_NAME_LEN) ||
                (len > kNistCurves_MAX_NAME_LEN)) {
            WOLFSSL_MSG("Unrecognized curve name in list");
            return -1;
        }
        for (nist_name = kNistCurves; nist_name->name != NULL; nist_name++) {
            if (len == nist_name->name_len &&
                    XSTRNCMP(list, nist_name->name, nist_name->name_len) == 0) {
                break;
            }
        }
        if (!nist_name->name) {
            WOLFSSL_MSG("Unrecognized curve name in list");
            return -1;
        }
        groups[count++] = nist_name->nid;
        if (*end == '\0') break;
    }

    return count;
}

int wolfSSL_CTX_set1_groups_list(WOLFSSL_CTX *ctx, char *list)
{
    int groups[WOLFSSL_MAX_GROUP_COUNT];
    int count;

    if (!ctx || !list) {
        return WOLFSSL_FAILURE;
    }

    if ((count = populate_groups(groups,
            WOLFSSL_MAX_GROUP_COUNT, list)) == -1) {
        return WOLFSSL_FAILURE;
    }

    return wolfSSL_CTX_set1_groups(ctx, groups, count);
}

int wolfSSL_set1_groups_list(WOLFSSL *ssl, char *list)
{
    int groups[WOLFSSL_MAX_GROUP_COUNT];
    int count;

    if (!ssl || !list) {
        return WOLFSSL_FAILURE;
    }

    if ((count = populate_groups(groups,
            WOLFSSL_MAX_GROUP_COUNT, list)) == -1) {
        return WOLFSSL_FAILURE;
    }

    return wolfSSL_set1_groups(ssl, groups, count);
}
#endif /* WOLFSSL_TLS13 */

static void InitwolfSSL_ECKey(WOLFSSL_EC_KEY* key)
{
    if (key) {
        key->group    = NULL;
        key->pub_key  = NULL;
        key->priv_key = NULL;
        key->internal = NULL;
        key->inSet    = 0;
        key->exSet    = 0;
    }
}

WOLFSSL_EC_KEY *wolfSSL_EC_KEY_new(void)
{
    WOLFSSL_EC_KEY *external;
    WOLFSSL_ENTER("wolfSSL_EC_KEY_new");

    external = (WOLFSSL_EC_KEY*)XMALLOC(sizeof(WOLFSSL_EC_KEY), NULL,
                                        DYNAMIC_TYPE_ECC);
    if (external == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_new malloc WOLFSSL_EC_KEY failure");
        return NULL;
    }
    XMEMSET(external, 0, sizeof(WOLFSSL_EC_KEY));

    InitwolfSSL_ECKey(external);

    external->internal = (ecc_key*)XMALLOC(sizeof(ecc_key), NULL,
                                           DYNAMIC_TYPE_ECC);
    if (external->internal == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_new malloc ecc key failure");
        goto error;
    }
    XMEMSET(external->internal, 0, sizeof(ecc_key));

    if (wc_ecc_init((ecc_key*)external->internal) != 0) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_new init ecc key failure");
        goto error;
    }

    /* Group unknown at creation */
    external->group = wolfSSL_EC_GROUP_new_by_curve_name(NID_undef);
    if (external->group == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_new malloc WOLFSSL_EC_GROUP failure");
        goto error;
    }

    /* public key */
    external->pub_key = wolfSSL_EC_POINT_new(external->group);
    if (external->pub_key == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_POINT_new failure");
        goto error;
    }

    /* private key */
    external->priv_key = wolfSSL_BN_new();
    if (external->priv_key == NULL) {
        WOLFSSL_MSG("wolfSSL_BN_new failure");
        goto error;
    }

    return external;
error:
    wolfSSL_EC_KEY_free(external);
    return NULL;
}

void wolfSSL_EC_KEY_free(WOLFSSL_EC_KEY *key)
{
    WOLFSSL_ENTER("wolfSSL_EC_KEY_free");

    if (key != NULL) {
        if (key->internal != NULL) {
            wc_ecc_free((ecc_key*)key->internal);
            XFREE(key->internal, NULL, DYNAMIC_TYPE_ECC);
        }
        wolfSSL_BN_free(key->priv_key);
        wolfSSL_EC_POINT_free(key->pub_key);
        wolfSSL_EC_GROUP_free(key->group);
        InitwolfSSL_ECKey(key); /* set back to NULLs for safety */

        XFREE(key, NULL, DYNAMIC_TYPE_ECC);
        /* key = NULL, don't try to access or double free it */
    }
}


/* set the group in WOLFSSL_EC_KEY and return WOLFSSL_SUCCESS on success */
int wolfSSL_EC_KEY_set_group(WOLFSSL_EC_KEY *key, WOLFSSL_EC_GROUP *group)
{
    if (key == NULL || group == NULL)
        return WOLFSSL_FAILURE;

    WOLFSSL_ENTER("wolfSSL_EC_KEY_set_group");

    if (key->group != NULL) {
        /* free the current group */
        wolfSSL_EC_GROUP_free(key->group);
    }

    key->group = wolfSSL_EC_GROUP_dup(group);
    if (key->group == NULL) {
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}


int wolfSSL_EC_KEY_generate_key(WOLFSSL_EC_KEY *key)
{
    int     initTmpRng = 0;
    int     eccEnum;
    WC_RNG* rng = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG* tmpRNG = NULL;
#else
    WC_RNG  tmpRNG[1];
#endif

    WOLFSSL_ENTER("wolfSSL_EC_KEY_generate_key");

    if (key == NULL || key->internal == NULL ||
        key->group == NULL || key->group->curve_idx < 0) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_generate_key Bad arguments");
        return 0;
    }

#ifdef WOLFSSL_SMALL_STACK
    tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
    if (tmpRNG == NULL)
        return 0;
#endif

    if (wc_InitRng(tmpRNG) == 0) {
        rng = tmpRNG;
        initTmpRng = 1;
    }
    else {
        WOLFSSL_MSG("Bad RNG Init, trying global");
        if (initGlobalRNG == 0)
            WOLFSSL_MSG("Global RNG no Init");
        else
            rng = &globalRNG;
    }

    if (rng == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_generate_key failed to set RNG");
#ifdef WOLFSSL_SMALL_STACK
        XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif
        return 0;
    }

    /* NIDToEccEnum returns -1 for invalid NID so if key->group->curve_nid
     * is 0 then pass ECC_CURVE_DEF as arg */
    eccEnum = key->group->curve_nid ?
            NIDToEccEnum(key->group->curve_nid) : ECC_CURVE_DEF;
    if (wc_ecc_make_key_ex(rng, 0, (ecc_key*)key->internal, eccEnum) != MP_OKAY) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_generate_key wc_ecc_make_key failed");
#ifdef WOLFSSL_SMALL_STACK
        XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif
        return 0;
    }

    if (initTmpRng)
        wc_FreeRng(tmpRNG);
#ifdef WOLFSSL_SMALL_STACK
    XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif

    if (SetECKeyExternal(key) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_generate_key SetECKeyExternal failed");
        return 0;
    }

    return 1;
}

#ifndef NO_WOLFSSL_STUB
void wolfSSL_EC_KEY_set_asn1_flag(WOLFSSL_EC_KEY *key, int asn1_flag)
{
    (void)key;
    (void)asn1_flag;

    WOLFSSL_ENTER("wolfSSL_EC_KEY_set_asn1_flag");
    WOLFSSL_STUB("EC_KEY_set_asn1_flag");
}
#endif

static int setupPoint(const WOLFSSL_EC_POINT *p) {
    if (!p) {
        return WOLFSSL_FAILURE;
    }
    if (p->inSet == 0) {
        WOLFSSL_MSG("No ECPoint internal set, do it");

        if (SetECPointInternal((WOLFSSL_EC_POINT *)p) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetECPointInternal SetECPointInternal failed");
            return WOLFSSL_FAILURE;
        }
    }
    return WOLFSSL_SUCCESS;
}

/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_EC_KEY_set_public_key(WOLFSSL_EC_KEY *key,
                                  const WOLFSSL_EC_POINT *pub)
{
    ecc_point *pub_p, *key_p;

    WOLFSSL_ENTER("wolfSSL_EC_KEY_set_public_key");

    if (key == NULL || key->internal == NULL ||
        pub == NULL || pub->internal == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_GROUP_get_order Bad arguments");
        return WOLFSSL_FAILURE;
    }

    if (key->inSet == 0) {
        if (SetECKeyInternal(key) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetECKeyInternal failed");
            return WOLFSSL_FAILURE;
        }
    }

    if (setupPoint(pub) != WOLFSSL_SUCCESS) {
        return WOLFSSL_FAILURE;
    }

    pub_p = (ecc_point*)pub->internal;
    key_p = (ecc_point*)key->pub_key->internal;

    /* create new point if required */
    if (key_p == NULL)
        key_p = wc_ecc_new_point();

    if (key_p == NULL) {
        WOLFSSL_MSG("key ecc point NULL");
        return WOLFSSL_FAILURE;
    }

    if (wc_ecc_copy_point(pub_p, key_p) != MP_OKAY) {
        WOLFSSL_MSG("ecc_copy_point failure");
        return WOLFSSL_FAILURE;
    }

    if (SetECPointExternal(key->pub_key) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetECKeyInternal failed");
        return WOLFSSL_FAILURE;
    }

    if (SetECKeyInternal(key) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetECKeyInternal failed");
        return WOLFSSL_FAILURE;
    }

    wolfSSL_EC_POINT_dump("pub", pub);
    wolfSSL_EC_POINT_dump("key->pub_key", key->pub_key);

    return WOLFSSL_SUCCESS;
}
/* End EC_KEY */

int wolfSSL_ECDSA_size(const WOLFSSL_EC_KEY *key)
{
    const EC_GROUP *group;
    int bits, bytes;
    word32 headerSz = 4;   /* 2*ASN_TAG + 2*LEN(ENUM) */

    if (!key) {
        return WOLFSSL_FAILURE;
    }

    if (!(group = wolfSSL_EC_KEY_get0_group(key))) {
        return WOLFSSL_FAILURE;
    }
    if ((bits = wolfSSL_EC_GROUP_order_bits(group)) == 0) {
        return WOLFSSL_FAILURE;
    }
    bytes = (bits + 7) / 8; /* bytes needed to hold bits */
    return headerSz +
            2 + /* possible leading zeroes in r and s */
            bytes + bytes + /* r and s */
            2;
}

int wolfSSL_ECDSA_sign(int type, const unsigned char *digest,
                       int digestSz, unsigned char *sig,
                       unsigned int *sigSz, WOLFSSL_EC_KEY *key)
{
    int ret = WOLFSSL_SUCCESS;
    WC_RNG* rng = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG* tmpRNG = NULL;
#else
    WC_RNG  tmpRNG[1];
#endif
    int initTmpRng = 0;

    WOLFSSL_ENTER("wolfSSL_ECDSA_sign");

    if (!key) {
        return WOLFSSL_FAILURE;
    }

#ifdef WOLFSSL_SMALL_STACK
    tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
    if (tmpRNG == NULL)
        return WOLFSSL_FAILURE;
#endif

    if (wc_InitRng(tmpRNG) == 0) {
        rng = tmpRNG;
        initTmpRng = 1;
    }
    else {
        WOLFSSL_MSG("Bad RNG Init, trying global");
        if (initGlobalRNG == 0) {
            WOLFSSL_MSG("Global RNG no Init");
        }
        else {
            rng = &globalRNG;
        }
    }
    if (rng) {
        if (wc_ecc_sign_hash(digest, digestSz, sig, sigSz, rng, (ecc_key*)key->internal) != MP_OKAY) {
            ret = WOLFSSL_FAILURE;
        }
        if (initTmpRng) {
            wc_FreeRng(tmpRNG);
        }
    } else {
        ret = WOLFSSL_FAILURE;
    }

#ifdef WOLFSSL_SMALL_STACK
    if (tmpRNG)
        XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif

    (void)type;
    return ret;
}

#ifndef HAVE_SELFTEST
/* ECC point compression types were not included in selftest ecc.h */

char* wolfSSL_EC_POINT_point2hex(const WOLFSSL_EC_GROUP* group,
                                 const WOLFSSL_EC_POINT* point, int form,
                                 WOLFSSL_BN_CTX* ctx)
{
    static const char* hexDigit = "0123456789ABCDEF";
    char* hex = NULL;
    int id;
    int i, sz, len;

    (void)ctx;

    if (group == NULL || point == NULL)
        return NULL;

    id = wc_ecc_get_curve_id(group->curve_idx);

    if ((sz = wc_ecc_get_curve_size_from_id(id)) < 0)
        return NULL;

    len = sz + 1;
    if (form == POINT_CONVERSION_UNCOMPRESSED)
        len += sz;

    hex = (char*)XMALLOC(2 * len + 1, NULL, DYNAMIC_TYPE_ECC);
    if (hex == NULL)
        return NULL;
    XMEMSET(hex, 0, 2 * len + 1);

    /* Put in x-ordinate after format byte. */
    i = sz - mp_unsigned_bin_size((mp_int*)point->X->internal) + 1;
    if (mp_to_unsigned_bin((mp_int*)point->X->internal, (byte*)(hex + i)) < 0) {
        XFREE(hex,  NULL, DYNAMIC_TYPE_ECC);
        return NULL;
    }

    if (form == POINT_CONVERSION_COMPRESSED) {
        hex[0] = mp_isodd((mp_int*)point->Y->internal) ? ECC_POINT_COMP_ODD :
                                                         ECC_POINT_COMP_EVEN;
    }
    else {
        hex[0] = ECC_POINT_UNCOMP;
        /* Put in y-ordinate after x-ordinate */
        i = 1 + 2 * sz - mp_unsigned_bin_size((mp_int*)point->Y->internal);
        if (mp_to_unsigned_bin((mp_int*)point->Y->internal,
                                                        (byte*)(hex + i)) < 0) {
            XFREE(hex,  NULL, DYNAMIC_TYPE_ECC);
            return NULL;
        }
    }

    for (i = len-1; i >= 0; i--) {
        byte b = hex[i];
        hex[i * 2 + 1] = hexDigit[b  & 0xf];
        hex[i * 2    ] = hexDigit[b >>   4];
    }

    return hex;
}

#endif /* HAVE_SELFTEST */

void wolfSSL_EC_POINT_dump(const char *msg, const WOLFSSL_EC_POINT *p)
{
#if defined(DEBUG_WOLFSSL)
    char *num;

    WOLFSSL_ENTER("wolfSSL_EC_POINT_dump");

    if (!WOLFSSL_IS_DEBUG_ON() || wolfSSL_GetLoggingCb()) {
        return;
    }

    if (p == NULL) {
        printf("%s = NULL", msg);
        return;
    }

    printf("%s:\n\tinSet=%d, exSet=%d\n", msg, p->inSet, p->exSet);
    num = wolfSSL_BN_bn2hex(p->X);
    printf("\tX = %s\n", num);
    XFREE(num, NULL, DYNAMIC_TYPE_ECC);
    num = wolfSSL_BN_bn2hex(p->Y);
    printf("\tY = %s\n", num);
    XFREE(num, NULL, DYNAMIC_TYPE_ECC);
    num = wolfSSL_BN_bn2hex(p->Z);
    printf("\tZ = %s\n", num);
    XFREE(num, NULL, DYNAMIC_TYPE_ECC);
#else
    (void)msg;
    (void)p;
#endif
}

/* Start EC_GROUP */

/* return code compliant with OpenSSL :
 *   0 if equal, 1 if not and -1 in case of error
 */
int wolfSSL_EC_GROUP_cmp(const WOLFSSL_EC_GROUP *a, const WOLFSSL_EC_GROUP *b,
                         WOLFSSL_BN_CTX *ctx)
{
    (void)ctx;

    WOLFSSL_ENTER("wolfSSL_EC_GROUP_cmp");

    if (a == NULL || b == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_GROUP_cmp Bad arguments");
        return WOLFSSL_FATAL_ERROR;
    }

    /* ok */
    if ((a->curve_idx == b->curve_idx) && (a->curve_nid == b->curve_nid))
        return 0;

    /* ko */
    return 1;
}

WOLFSSL_EC_GROUP *wolfSSL_EC_GROUP_dup(const WOLFSSL_EC_GROUP *src)
{
    if (!src)
        return NULL;
    return wolfSSL_EC_GROUP_new_by_curve_name(src->curve_nid);
}

#endif /* HAVE_ECC */
#endif /* OPENSSL_EXTRA */

#if defined(HAVE_ECC) && (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL))
const WOLFSSL_EC_METHOD* wolfSSL_EC_GROUP_method_of(
                                                const WOLFSSL_EC_GROUP *group)
{
    return group;
}

int wolfSSL_EC_METHOD_get_field_type(const WOLFSSL_EC_METHOD *meth)
{
    if (meth) {
        return NID_X9_62_prime_field;
    }
    return WOLFSSL_FAILURE;
}

void wolfSSL_EC_GROUP_free(WOLFSSL_EC_GROUP *group)
{
    WOLFSSL_ENTER("wolfSSL_EC_GROUP_free");

    XFREE(group, NULL, DYNAMIC_TYPE_ECC);
    /* group = NULL, don't try to access or double free it */
}
#endif

#ifdef OPENSSL_EXTRA
#ifdef HAVE_ECC
#ifndef NO_WOLFSSL_STUB
void wolfSSL_EC_GROUP_set_asn1_flag(WOLFSSL_EC_GROUP *group, int flag)
{
    (void)group;
    (void)flag;

    WOLFSSL_ENTER("wolfSSL_EC_GROUP_set_asn1_flag");
    WOLFSSL_STUB("EC_GROUP_set_asn1_flag");
}
#endif

WOLFSSL_EC_GROUP *wolfSSL_EC_GROUP_new_by_curve_name(int nid)
{
    WOLFSSL_EC_GROUP *g;
    int x;
    int eccEnum;

    WOLFSSL_ENTER("wolfSSL_EC_GROUP_new_by_curve_name");

    /* If NID passed in is OpenSSL type, convert it to ecc_curve_id enum */
    eccEnum = NIDToEccEnum(nid);

    /* curve group */
    g = (WOLFSSL_EC_GROUP*) XMALLOC(sizeof(WOLFSSL_EC_GROUP), NULL,
                                    DYNAMIC_TYPE_ECC);
    if (g == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_GROUP_new_by_curve_name malloc failure");
        return NULL;
    }
    XMEMSET(g, 0, sizeof(WOLFSSL_EC_GROUP));

    /* set the nid of the curve */
    g->curve_nid = nid;

    if (eccEnum != -1) {
        /* search and set the corresponding internal curve idx */
        for (x = 0; ecc_sets[x].size != 0; x++)
            if (ecc_sets[x].id == eccEnum) {
                g->curve_idx = x;
                g->curve_oid = ecc_sets[x].oidSum;
                break;
            }
    }

    return g;
}

/* return code compliant with OpenSSL :
 *   the curve nid if success, 0 if error
 */
int wolfSSL_EC_GROUP_get_curve_name(const WOLFSSL_EC_GROUP *group)
{
    int nid;
    WOLFSSL_ENTER("wolfSSL_EC_GROUP_get_curve_name");

    if (group == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_GROUP_get_curve_name Bad arguments");
        return WOLFSSL_FAILURE;
    }

    /* If curve_nid is ECC Enum type, return corresponding OpenSSL nid */
    if ((nid = EccEnumToNID(group->curve_nid)) != -1)
        return nid;

    return group->curve_nid;
}

/* return code compliant with OpenSSL :
 *   the degree of the curve if success, 0 if error
 */
int wolfSSL_EC_GROUP_get_degree(const WOLFSSL_EC_GROUP *group)
{
    int nid;
    int tmp;

    WOLFSSL_ENTER("wolfSSL_EC_GROUP_get_degree");

    if (group == NULL || group->curve_idx < 0) {
        WOLFSSL_MSG("wolfSSL_EC_GROUP_get_degree Bad arguments");
        return WOLFSSL_FAILURE;
    }

    /* If curve_nid passed in is an ecc_curve_id enum, convert it to the
        corresponding OpenSSL NID */
    tmp = EccEnumToNID(group->curve_nid);
    if (tmp != -1){
        nid = tmp;
    }
    else{
        nid = group->curve_nid;
    }

    switch(nid) {
        case NID_secp112r1:
        case NID_secp112r2:
            return 112;
        case NID_secp128r1:
        case NID_secp128r2:
            return 128;
        case NID_secp160k1:
        case NID_secp160r1:
        case NID_secp160r2:
        case NID_brainpoolP160r1:
            return 160;
        case NID_secp192k1:
        case NID_brainpoolP192r1:
        case NID_X9_62_prime192v1:
            return 192;
        case NID_secp224k1:
        case NID_secp224r1:
        case NID_brainpoolP224r1:
            return 224;
        case NID_secp256k1:
        case NID_brainpoolP256r1:
        case NID_X9_62_prime256v1:
            return 256;
        case NID_brainpoolP320r1:
            return 320;
        case NID_secp384r1:
        case NID_brainpoolP384r1:
            return 384;
        case NID_secp521r1:
            return 521;
        case NID_brainpoolP512r1:
            return 512;
        default:
            return WOLFSSL_FAILURE;
    }
}

/* Converts OpenSSL NID value of ECC curves to the associated enum values in
   ecc_curve_id, used by ecc_sets[].*/
int NIDToEccEnum(int n)
{
    WOLFSSL_ENTER("NIDToEccEnum()");

    switch(n) {
        case NID_X9_62_prime192v1:
            return ECC_SECP192R1;
        case NID_X9_62_prime192v2:
            return ECC_PRIME192V2;
        case NID_X9_62_prime192v3:
            return ECC_PRIME192V3;
        case NID_X9_62_prime239v1:
            return ECC_PRIME239V1;
        case NID_X9_62_prime239v2:
            return ECC_PRIME239V2;
        case NID_X9_62_prime239v3:
            return ECC_PRIME239V3;
        case NID_X9_62_prime256v1:
            return ECC_SECP256R1;
        case NID_secp112r1:
            return ECC_SECP112R1;
        case NID_secp112r2:
            return ECC_SECP112R2;
        case NID_secp128r1:
            return ECC_SECP128R1;
        case NID_secp128r2:
            return ECC_SECP128R2;
        case NID_secp160r1:
            return ECC_SECP160R1;
        case NID_secp160r2:
            return ECC_SECP160R2;
        case NID_secp224r1:
            return ECC_SECP224R1;
        case NID_secp384r1:
            return ECC_SECP384R1;
        case NID_secp521r1:
            return ECC_SECP521R1;
        case NID_secp160k1:
            return ECC_SECP160K1;
        case NID_secp192k1:
            return ECC_SECP192K1;
        case NID_secp224k1:
            return ECC_SECP224K1;
        case NID_secp256k1:
            return ECC_SECP256K1;
        case NID_brainpoolP160r1:
            return ECC_BRAINPOOLP160R1;
        case NID_brainpoolP192r1:
            return ECC_BRAINPOOLP192R1;
        case NID_brainpoolP224r1:
            return ECC_BRAINPOOLP224R1;
        case NID_brainpoolP256r1:
            return ECC_BRAINPOOLP256R1;
        case NID_brainpoolP320r1:
            return ECC_BRAINPOOLP320R1;
        case NID_brainpoolP384r1:
            return ECC_BRAINPOOLP384R1;
        case NID_brainpoolP512r1:
            return ECC_BRAINPOOLP512R1;
        default:
            WOLFSSL_MSG("NID not found");
            return -1;
    }
}

/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_EC_GROUP_get_order(const WOLFSSL_EC_GROUP *group,
                               WOLFSSL_BIGNUM *order, WOLFSSL_BN_CTX *ctx)
{
    (void)ctx;

    if (group == NULL || order == NULL || order->internal == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_GROUP_get_order NULL error");
        return WOLFSSL_FAILURE;
    }

    if (mp_init((mp_int*)order->internal) != MP_OKAY) {
        WOLFSSL_MSG("wolfSSL_EC_GROUP_get_order mp_init failure");
        return WOLFSSL_FAILURE;
    }

    if (mp_read_radix((mp_int*)order->internal,
                  ecc_sets[group->curve_idx].order, MP_RADIX_HEX) != MP_OKAY) {
        WOLFSSL_MSG("wolfSSL_EC_GROUP_get_order mp_read order failure");
        mp_clear((mp_int*)order->internal);
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

int wolfSSL_EC_GROUP_order_bits(const WOLFSSL_EC_GROUP *group)
{
    int ret;
    mp_int order;

    if (group == NULL || group->curve_idx < 0) {
        WOLFSSL_MSG("wolfSSL_EC_GROUP_order_bits NULL error");
        return 0;
    }

    ret = mp_init(&order);
    if (ret == 0) {
        ret = mp_read_radix(&order, ecc_sets[group->curve_idx].order,
            MP_RADIX_HEX);
        if (ret == 0)
            ret = mp_count_bits(&order);
        mp_clear(&order);
    }

    return ret;
}

/* End EC_GROUP */

/* Start EC_POINT */

/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_ECPoint_i2d(const WOLFSSL_EC_GROUP *group,
                        const WOLFSSL_EC_POINT *p,
                        unsigned char *out, unsigned int *len)
{
    int err;

    WOLFSSL_ENTER("wolfSSL_ECPoint_i2d");

    if (group == NULL || p == NULL || len == NULL) {
        WOLFSSL_MSG("wolfSSL_ECPoint_i2d NULL error");
        return WOLFSSL_FAILURE;
    }

    if (setupPoint(p) != WOLFSSL_SUCCESS) {
        return WOLFSSL_FAILURE;
    }

    if (out != NULL) {
        wolfSSL_EC_POINT_dump("i2d p", p);
    }

    err = wc_ecc_export_point_der(group->curve_idx, (ecc_point*)p->internal,
                                  out, len);
    if (err != MP_OKAY && !(out == NULL && err == LENGTH_ONLY_E)) {
        WOLFSSL_MSG("wolfSSL_ECPoint_i2d wc_ecc_export_point_der failed");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

#if !defined(HAVE_FIPS) || (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION>2))
/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_ECPoint_d2i(unsigned char *in, unsigned int len,
                        const WOLFSSL_EC_GROUP *group, WOLFSSL_EC_POINT *p)
{
    WOLFSSL_ENTER("wolfSSL_ECPoint_d2i");

    if (group == NULL || p == NULL || p->internal == NULL || in == NULL) {
        WOLFSSL_MSG("wolfSSL_ECPoint_d2i NULL error");
        return WOLFSSL_FAILURE;
    }

#ifndef HAVE_SELFTEST
    if (wc_ecc_import_point_der_ex(in, len, group->curve_idx,
                                   (ecc_point*)p->internal, 0) != MP_OKAY) {
        WOLFSSL_MSG("wc_ecc_import_point_der_ex failed");
        return WOLFSSL_FAILURE;
    }
#else
    /* ECC_POINT_UNCOMP is not defined CAVP self test so use magic number */
    if (in[0] == 0x04) {
        if (wc_ecc_import_point_der(in, len, group->curve_idx,
                                    (ecc_point*)p->internal) != MP_OKAY) {
            WOLFSSL_MSG("wc_ecc_import_point_der failed");
            return WOLFSSL_FAILURE;
        }
    }
    else {
        WOLFSSL_MSG("Only uncompressed points supported with HAVE_SELFTEST");
        return WOLFSSL_FAILURE;
    }
#endif

    /* Set new external point */
    if (SetECPointExternal(p) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetECPointExternal failed");
        return WOLFSSL_FAILURE;
    }

    wolfSSL_EC_POINT_dump("d2i p", p);

    return WOLFSSL_SUCCESS;
}

size_t wolfSSL_EC_POINT_point2oct(const WOLFSSL_EC_GROUP *group,
                                  const WOLFSSL_EC_POINT *p,
                                  char form,
                                  byte *buf, size_t len, WOLFSSL_BN_CTX *ctx)
{
    word32 min_len = (word32)len;
#ifndef HAVE_SELFTEST
    int compressed = form == POINT_CONVERSION_COMPRESSED ? 1 : 0;
#endif /* !HAVE_SELFTEST */

    WOLFSSL_ENTER("EC_POINT_point2oct");

    if (!group || !p) {
        return WOLFSSL_FAILURE;
    }

    if (setupPoint(p) != WOLFSSL_SUCCESS) {
        return WOLFSSL_FAILURE;
    }

    if (wolfSSL_EC_POINT_is_at_infinity(group, p)) {
        /* encodes to a single 0 octet */
        if (buf != NULL) {
            if (len < 1) {
                ECerr(EC_F_EC_GFP_SIMPLE_POINT2OCT, EC_R_BUFFER_TOO_SMALL);
                return WOLFSSL_FAILURE;
            }
            buf[0] = 0;
        }
        return 1;
    }

    if (form != POINT_CONVERSION_UNCOMPRESSED
#ifndef HAVE_SELFTEST
            && form != POINT_CONVERSION_COMPRESSED
#endif /* !HAVE_SELFTEST */
            ) {
        WOLFSSL_MSG("Unsupported curve form");
        return WOLFSSL_FAILURE;
    }

#ifndef HAVE_SELFTEST
    if (wc_ecc_export_point_der_ex(group->curve_idx, (ecc_point*)p->internal,
               buf, &min_len, compressed) != (buf ? MP_OKAY : LENGTH_ONLY_E)) {
        return WOLFSSL_FAILURE;
    }
#else
    if (wc_ecc_export_point_der(group->curve_idx, (ecc_point*)p->internal,
                                buf, &min_len) != (buf ? MP_OKAY : LENGTH_ONLY_E)) {
        return WOLFSSL_FAILURE;
    }
#endif /* !HAVE_SELFTEST */

    (void)ctx;

    return (size_t)min_len;
}


int wolfSSL_EC_POINT_oct2point(const WOLFSSL_EC_GROUP *group,
                               WOLFSSL_EC_POINT *p, const unsigned char *buf,
                               size_t len, WOLFSSL_BN_CTX *ctx)
{
    WOLFSSL_ENTER("wolfSSL_EC_POINT_oct2point");

    if (!group || !p) {
        return WOLFSSL_FAILURE;
    }

    (void)ctx;

    return wolfSSL_ECPoint_d2i((unsigned char*)buf, (unsigned int)len, group, p);
}

int wolfSSL_i2o_ECPublicKey(const WOLFSSL_EC_KEY *in, unsigned char **out)
{
    size_t len;
    unsigned char *tmp = NULL;
    char form;
    WOLFSSL_ENTER("wolfSSL_i2o_ECPublicKey");

    if (!in) {
        WOLFSSL_MSG("wolfSSL_i2o_ECPublicKey Bad arguments");
        return WOLFSSL_FAILURE;
    }

#ifdef HAVE_COMP_KEY
    /* Default to compressed form if not set */
    form = in->form == POINT_CONVERSION_UNCOMPRESSED ?
            POINT_CONVERSION_UNCOMPRESSED:
            POINT_CONVERSION_COMPRESSED;
#else
    form = POINT_CONVERSION_UNCOMPRESSED;
#endif

    len = wolfSSL_EC_POINT_point2oct(in->group, in->pub_key, form,
                                     NULL, 0, NULL);

    if (len != WOLFSSL_FAILURE && out) {
        if (!*out) {
            if (!(tmp = (unsigned char*)XMALLOC(len, NULL,
                                                DYNAMIC_TYPE_OPENSSL))) {
                WOLFSSL_MSG("malloc failed");
                return WOLFSSL_FAILURE;
            }
            *out = tmp;
        }

        if (wolfSSL_EC_POINT_point2oct(in->group, in->pub_key, form, *out,
                                       len, NULL) == WOLFSSL_FAILURE) {
            if (tmp) {
                XFREE(tmp, NULL, DYNAMIC_TYPE_OPENSSL);
                *out = NULL;
            }
            return WOLFSSL_FAILURE;
        }

        if (!tmp) {
            /* Move buffer forward if it was not alloced in this function */
            *out += len;
        }
    }

    return (int)len;
}

#ifdef HAVE_ECC_KEY_IMPORT
WOLFSSL_EC_KEY *wolfSSL_d2i_ECPrivateKey(WOLFSSL_EC_KEY **key, const unsigned char **in,
                                         long len)
{
    WOLFSSL_EC_KEY *eckey = NULL;
    WOLFSSL_ENTER("wolfSSL_d2i_ECPrivateKey");

    if (!in || !*in || len <= 0) {
        WOLFSSL_MSG("wolfSSL_d2i_ECPrivateKey Bad arguments");
        return NULL;
    }

    if (!(eckey = wolfSSL_EC_KEY_new())) {
        WOLFSSL_MSG("wolfSSL_EC_KEY_new error");
        return NULL;
    }

    if (wc_ecc_import_private_key(*in, (word32)len, NULL, 0,
            (ecc_key*)eckey->internal) != MP_OKAY) {
        WOLFSSL_MSG("wc_ecc_import_private_key error");
        goto error;
    }

    eckey->inSet = 1;

    if (SetECKeyExternal(eckey) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetECKeyExternal error");
        goto error;
    }

    if (key) {
        *key = eckey;
    }

    return eckey;

error:
    wolfSSL_EC_KEY_free(eckey);
    return NULL;
}
#endif /* HAVE_ECC_KEY_IMPORT */

int wolfSSL_i2d_ECPrivateKey(const WOLFSSL_EC_KEY *in, unsigned char **out)
{
    int len;
    byte* buf = NULL;
    WOLFSSL_ENTER("wolfSSL_i2d_ECPrivateKey");

    if (!in) {
        WOLFSSL_MSG("wolfSSL_i2d_ECPrivateKey Bad arguments");
        return WOLFSSL_FAILURE;
    }

    if (!in->inSet && SetECKeyInternal((WOLFSSL_EC_KEY*)in) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetECKeyInternal error");
        return WOLFSSL_FAILURE;
    }

    if ((len = wc_ecc_size((ecc_key*)in->internal)) <= 0) {
        WOLFSSL_MSG("wc_ecc_size error");
        return WOLFSSL_FAILURE;
    }

    if (out) {
        if (!(buf = (byte*)XMALLOC(len, NULL, DYNAMIC_TYPE_TMP_BUFFER))) {
            WOLFSSL_MSG("tmp buffer malloc error");
            return WOLFSSL_FAILURE;
        }

        if (wc_ecc_export_private_only((ecc_key*)in->internal, buf,
                (word32*)&len) != MP_OKAY) {
            WOLFSSL_MSG("wc_ecc_export_private_only error");
            XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            return WOLFSSL_FAILURE;
        }

        if (*out) {
            XMEMCPY(*out, buf, len);
            XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        }
        else {
            *out = buf;
        }
    }

    return len;
}

void wolfSSL_EC_KEY_set_conv_form(WOLFSSL_EC_KEY *eckey, char form)
{
    if (eckey && (form == POINT_CONVERSION_UNCOMPRESSED
#ifdef HAVE_COMP_KEY
                  || form == POINT_CONVERSION_COMPRESSED
#endif
                  )) {
        eckey->form = form;
    } else {
        WOLFSSL_MSG("Incorrect form or HAVE_COMP_KEY not compiled in");
    }
}


/* wolfSSL_EC_POINT_point2bn should return "in" if not null */
WOLFSSL_BIGNUM *wolfSSL_EC_POINT_point2bn(const WOLFSSL_EC_GROUP *group,
                                          const WOLFSSL_EC_POINT *p,
                                          char form,
                                          WOLFSSL_BIGNUM *in, WOLFSSL_BN_CTX *ctx)
{
    size_t len;
    byte *buf;
    WOLFSSL_BIGNUM *ret = NULL;

    WOLFSSL_ENTER("wolfSSL_EC_POINT_oct2point");

    if (!group || !p) {
        return NULL;
    }

    if ((len = wolfSSL_EC_POINT_point2oct(group, p, form,
                                          NULL, 0, ctx)) == WOLFSSL_FAILURE) {
        return NULL;
    }

    if (!(buf = (byte*)XMALLOC(len, NULL, DYNAMIC_TYPE_TMP_BUFFER))) {
        WOLFSSL_MSG("malloc failed");
        return NULL;
    }

    if (wolfSSL_EC_POINT_point2oct(group, p, form,
                                   buf, len, ctx) == len) {
        ret = wolfSSL_BN_bin2bn(buf, (int)len, in);
    }

    XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);

    return ret;
}
#endif /* !HAVE_FIPS || HAVE_FIPS_VERSION > 2 */

#ifdef USE_ECC_B_PARAM
int wolfSSL_EC_POINT_is_on_curve(const WOLFSSL_EC_GROUP *group,
                                 const WOLFSSL_EC_POINT *point,
                                 WOLFSSL_BN_CTX *ctx)
{
    (void)ctx;
    WOLFSSL_ENTER("wolfSSL_EC_POINT_is_on_curve");

    if (!group || !point) {
        WOLFSSL_MSG("Invalid arguments");
        return WOLFSSL_FAILURE;
    }

    if (!point->inSet && SetECPointInternal((WOLFSSL_EC_POINT*)point)) {
        WOLFSSL_MSG("SetECPointInternal error");
        return WOLFSSL_FAILURE;
    }

    return wc_ecc_point_is_on_curve((ecc_point*)point->internal, group->curve_idx)
            == MP_OKAY ? WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
}
#endif /* USE_ECC_B_PARAM */

WOLFSSL_EC_POINT *wolfSSL_EC_POINT_new(const WOLFSSL_EC_GROUP *group)
{
    WOLFSSL_EC_POINT *p;

    WOLFSSL_ENTER("wolfSSL_EC_POINT_new");

    if (group == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_POINT_new NULL error");
        return NULL;
    }

    p = (WOLFSSL_EC_POINT *)XMALLOC(sizeof(WOLFSSL_EC_POINT), NULL,
                                    DYNAMIC_TYPE_ECC);
    if (p == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_POINT_new malloc ecc point failure");
        return NULL;
    }
    XMEMSET(p, 0, sizeof(WOLFSSL_EC_POINT));

    p->internal = wc_ecc_new_point();
    if (p->internal == NULL) {
        WOLFSSL_MSG("ecc_new_point failure");
        XFREE(p, NULL, DYNAMIC_TYPE_ECC);
        return NULL;
    }

    return p;
}

/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_EC_POINT_get_affine_coordinates_GFp(const WOLFSSL_EC_GROUP *group,
                                                const WOLFSSL_EC_POINT *point,
                                                WOLFSSL_BIGNUM *x,
                                                WOLFSSL_BIGNUM *y,
                                                WOLFSSL_BN_CTX *ctx)
{
    mp_digit mp;
    mp_int modulus;
    (void)ctx;

    WOLFSSL_ENTER("wolfSSL_EC_POINT_get_affine_coordinates_GFp");

    if (group == NULL || point == NULL || point->internal == NULL ||
        x == NULL || y == NULL || wolfSSL_EC_POINT_is_at_infinity(group, point)) {
        WOLFSSL_MSG("wolfSSL_EC_POINT_get_affine_coordinates_GFp NULL error");
        return WOLFSSL_FAILURE;
    }

    if (setupPoint(point) != WOLFSSL_SUCCESS) {
        return WOLFSSL_FAILURE;
    }

    if (!wolfSSL_BN_is_one(point->Z)) {
        if (mp_init(&modulus) != MP_OKAY) {
            WOLFSSL_MSG("mp_init failed");
            return WOLFSSL_FAILURE;
        }
        /* Map the Jacobian point back to affine space */
        if (mp_read_radix(&modulus, ecc_sets[group->curve_idx].prime, MP_RADIX_HEX) != MP_OKAY) {
            WOLFSSL_MSG("mp_read_radix failed");
            mp_clear(&modulus);
            return WOLFSSL_FAILURE;
        }
        if (mp_montgomery_setup(&modulus, &mp) != MP_OKAY) {
            WOLFSSL_MSG("mp_montgomery_setup failed");
            mp_clear(&modulus);
            return WOLFSSL_FAILURE;
        }
        if (ecc_map((ecc_point*)point->internal, &modulus, mp) != MP_OKAY) {
            WOLFSSL_MSG("ecc_map failed");
            mp_clear(&modulus);
            return WOLFSSL_FAILURE;
        }
        if (SetECPointExternal((WOLFSSL_EC_POINT *)point) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetECPointExternal failed");
            mp_clear(&modulus);
            return WOLFSSL_FAILURE;
        }

        mp_clear(&modulus);
    }

    BN_copy(x, point->X);
    BN_copy(y, point->Y);

    return WOLFSSL_SUCCESS;
}

int wolfSSL_EC_POINT_set_affine_coordinates_GFp(const WOLFSSL_EC_GROUP *group,
                                                WOLFSSL_EC_POINT *point,
                                                const WOLFSSL_BIGNUM *x,
                                                const WOLFSSL_BIGNUM *y,
                                                WOLFSSL_BN_CTX *ctx)
{
    (void)ctx;
    WOLFSSL_ENTER("wolfSSL_EC_POINT_set_affine_coordinates_GFp");

    if (group == NULL || point == NULL || point->internal == NULL ||
        x == NULL || y == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_POINT_set_affine_coordinates_GFp NULL error");
        return WOLFSSL_FAILURE;
    }

    if (!point->X) {
        point->X = wolfSSL_BN_new();
    }
    if (!point->Y) {
        point->Y = wolfSSL_BN_new();
    }
    if (!point->Z) {
        point->Z = wolfSSL_BN_new();
    }
    if (!point->X || !point->Y || !point->Z) {
        WOLFSSL_MSG("wolfSSL_BN_new failed");
        return WOLFSSL_FAILURE;
    }

    BN_copy(point->X, x);
    BN_copy(point->Y, y);
    BN_copy(point->Z, wolfSSL_BN_value_one());

    if (SetECPointInternal((WOLFSSL_EC_POINT *)point) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetECPointInternal failed");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

#if !defined(WOLFSSL_ATECC508A) && !defined(WOLFSSL_ATECC608A) && \
    !defined(HAVE_SELFTEST)
#if !defined(HAVE_FIPS) || (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION>2))
int wolfSSL_EC_POINT_add(const WOLFSSL_EC_GROUP *group, WOLFSSL_EC_POINT *r,
                         const WOLFSSL_EC_POINT *p1,
                         const WOLFSSL_EC_POINT *p2, WOLFSSL_BN_CTX *ctx)
{
    mp_int a, prime, mu;
    mp_digit mp = 0;
    ecc_point* montP1 = NULL;
    ecc_point* montP2 = NULL;
    ecc_point* eccP1;
    ecc_point* eccP2;
    int ret = WOLFSSL_FAILURE;

    (void)ctx;

    if (!group || !r || !p1 || !p2) {
        WOLFSSL_MSG("wolfSSL_EC_POINT_add error");
        return WOLFSSL_FAILURE;
    }

    if (setupPoint(r) != WOLFSSL_SUCCESS ||
        setupPoint(p1) != WOLFSSL_SUCCESS ||
        setupPoint(p2) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("setupPoint error");
        return WOLFSSL_FAILURE;
    }

    /* read the curve prime and a */
    if (mp_init_multi(&prime, &a, &mu, NULL, NULL, NULL) != MP_OKAY) {
        WOLFSSL_MSG("mp_init_multi error");
        goto cleanup;
    }

    if (mp_read_radix(&a, ecc_sets[group->curve_idx].Af, MP_RADIX_HEX)
            != MP_OKAY) {
        WOLFSSL_MSG("mp_read_radix a error");
        goto cleanup;
    }

    if (mp_read_radix(&prime, ecc_sets[group->curve_idx].prime, MP_RADIX_HEX)
            != MP_OKAY) {
        WOLFSSL_MSG("mp_read_radix prime error");
        goto cleanup;
    }

    if (mp_montgomery_setup(&prime, &mp) != MP_OKAY) {
        WOLFSSL_MSG("mp_montgomery_setup nqm error");
        goto cleanup;
    }

    eccP1 = (ecc_point*)p1->internal;
    eccP2 = (ecc_point*)p2->internal;

    if (!(montP1 = wc_ecc_new_point_h(NULL)) ||
            !(montP2 = wc_ecc_new_point_h(NULL))) {
        WOLFSSL_MSG("wc_ecc_new_point_h nqm error");
        goto cleanup;
    }

    if ((mp_montgomery_calc_normalization(&mu, &prime)) != MP_OKAY) {
        WOLFSSL_MSG("mp_montgomery_calc_normalization error");
        goto cleanup;
    }

    /* Convert to Montgomery form */
    if (mp_cmp_d(&mu, 1) == MP_EQ) {
        if (wc_ecc_copy_point(eccP1, montP1) != MP_OKAY ||
                wc_ecc_copy_point(eccP2, montP2) != MP_OKAY) {
            WOLFSSL_MSG("wc_ecc_copy_point error");
            goto cleanup;
        }
    } else {
        if (mp_mulmod(eccP1->x, &mu, &prime, montP1->x) != MP_OKAY ||
                mp_mulmod(eccP1->y, &mu, &prime, montP1->y) != MP_OKAY ||
                mp_mulmod(eccP1->z, &mu, &prime, montP1->z) != MP_OKAY) {
            WOLFSSL_MSG("mp_mulmod error");
            goto cleanup;
        }
        if (mp_mulmod(eccP2->x, &mu, &prime, montP2->x) != MP_OKAY ||
                mp_mulmod(eccP2->y, &mu, &prime, montP2->y) != MP_OKAY ||
                mp_mulmod(eccP2->z, &mu, &prime, montP2->z) != MP_OKAY) {
            WOLFSSL_MSG("mp_mulmod error");
            goto cleanup;
        }
    }

    if (ecc_projective_add_point(montP1, montP2, (ecc_point*)r->internal,
            &a, &prime, mp) != MP_OKAY) {
        WOLFSSL_MSG("ecc_projective_add_point error");
        goto cleanup;
    }

    if (ecc_map((ecc_point*)r->internal, &prime, mp) != MP_OKAY) {
        WOLFSSL_MSG("ecc_map error");
        goto cleanup;
    }

    ret = WOLFSSL_SUCCESS;
cleanup:
    mp_clear(&a);
    mp_clear(&prime);
    mp_clear(&mu);
    wc_ecc_del_point_h(montP1, NULL);
    wc_ecc_del_point_h(montP2, NULL);
    return ret;
}

/* Calculate the value: generator * n + q * m
 * return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_EC_POINT_mul(const WOLFSSL_EC_GROUP *group, WOLFSSL_EC_POINT *r,
                         const WOLFSSL_BIGNUM *n, const WOLFSSL_EC_POINT *q,
                         const WOLFSSL_BIGNUM *m, WOLFSSL_BN_CTX *ctx)
{
    mp_int a, prime;
    int ret = WOLFSSL_FAILURE;
    ecc_point* result = NULL;
    ecc_point* tmp = NULL;

    (void)ctx;

    WOLFSSL_ENTER("wolfSSL_EC_POINT_mul");

    if (!group || !r) {
        WOLFSSL_MSG("wolfSSL_EC_POINT_mul NULL error");
        return WOLFSSL_FAILURE;
    }

    if (!(result = wc_ecc_new_point())) {
        WOLFSSL_MSG("wolfSSL_EC_POINT_new error");
        return WOLFSSL_FAILURE;
    }

    /* read the curve prime and a */
    if (mp_init_multi(&prime, &a, NULL, NULL, NULL, NULL) != MP_OKAY) {
        WOLFSSL_MSG("mp_init_multi error");
        goto cleanup;
    }

    if (q && setupPoint(q) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("setupPoint error");
        goto cleanup;
    }

    if (mp_read_radix(&prime, ecc_sets[group->curve_idx].prime, MP_RADIX_HEX)
            != MP_OKAY) {
        WOLFSSL_MSG("mp_read_radix prime error");
        goto cleanup;
    }

    if (mp_read_radix(&a, ecc_sets[group->curve_idx].Af, MP_RADIX_HEX)
            != MP_OKAY) {
        WOLFSSL_MSG("mp_read_radix a error");
        goto cleanup;
    }

    if (n) {
        /* load generator */
        if (wc_ecc_get_generator(result, group->curve_idx)
                != MP_OKAY) {
            WOLFSSL_MSG("wc_ecc_get_generator error");
            goto cleanup;
        }
    }

    if (n && q && m) {
        /* r = generator * n + q * m */
#ifdef ECC_SHAMIR
        if (ecc_mul2add(result, (mp_int*)n->internal,
                        (ecc_point*)q->internal, (mp_int*)m->internal,
                        result, &a, &prime, NULL)
                != MP_OKAY) {
            WOLFSSL_MSG("ecc_mul2add error");
            goto cleanup;
        }
#else
        mp_digit mp = 0;
        if (mp_montgomery_setup(&prime, &mp) != MP_OKAY) {
            WOLFSSL_MSG("mp_montgomery_setup nqm error");
            goto cleanup;
        }
        if (!(tmp = wc_ecc_new_point())) {
            WOLFSSL_MSG("wolfSSL_EC_POINT_new nqm error");
            goto cleanup;
        }
        /* r = generator * n */
        if (wc_ecc_mulmod((mp_int*)n->internal, result, result, &a, &prime, 0)
                != MP_OKAY) {
            WOLFSSL_MSG("wc_ecc_mulmod nqm error");
            goto cleanup;
        }
        /* tmp = q * m */
        if (wc_ecc_mulmod((mp_int*)m->internal, (ecc_point*)q->internal,
                tmp, &a, &prime, 0) != MP_OKAY) {
            WOLFSSL_MSG("wc_ecc_mulmod nqm error");
            goto cleanup;
        }
        /* result = result + tmp */
        if (ecc_projective_add_point(tmp, result, result, &a, &prime, mp)
                != MP_OKAY) {
            WOLFSSL_MSG("wc_ecc_mulmod nqm error");
            goto cleanup;
        }
        if (ecc_map(result, &prime, mp) != MP_OKAY) {
            WOLFSSL_MSG("ecc_map nqm error");
            goto cleanup;
        }
#endif
    }
    else if (n) {
        /* r = generator * n */
        if (wc_ecc_mulmod((mp_int*)n->internal, result, result, &a, &prime, 1)
                != MP_OKAY) {
            WOLFSSL_MSG("wc_ecc_mulmod gn error");
            goto cleanup;
        }
    }
    else if (q && m) {
        /* r = q * m */
        if (wc_ecc_mulmod((mp_int*)m->internal, (ecc_point*)q->internal,
                           result, &a, &prime, 1) != MP_OKAY) {
            WOLFSSL_MSG("wc_ecc_mulmod qm error");
            goto cleanup;
        }
    }

    /* copy to destination */
    if (wc_ecc_copy_point(result, (ecc_point*)r->internal)) {
        WOLFSSL_MSG("wc_ecc_copy_point error");
        goto cleanup;
    }
    r->inSet = 1;
    if (SetECPointExternal(r) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetECPointExternal error");
        goto cleanup;
    }

    ret = WOLFSSL_SUCCESS;
cleanup:
    mp_clear(&a);
    mp_clear(&prime);
    wc_ecc_del_point(result);
    wc_ecc_del_point(tmp);
    return ret;
}
#endif /* !HAVE_FIPS || HAVE_FIPS_VERSION > 2 */
#endif /* !defined(WOLFSSL_ATECC508A) && defined(ECC_SHAMIR) &&
        * !defined(HAVE_SELFTEST) */

/* (x, y) -> (x, -y) */
int wolfSSL_EC_POINT_invert(const WOLFSSL_EC_GROUP *group, WOLFSSL_EC_POINT *a,
                            WOLFSSL_BN_CTX *ctx)
{
    ecc_point* p;
    mp_int prime;

    (void)ctx;

    WOLFSSL_ENTER("wolfSSL_EC_POINT_invert");

    if (!group || !a || !a->internal || setupPoint(a) != WOLFSSL_SUCCESS) {
        return WOLFSSL_FAILURE;
    }

    p = (ecc_point*)a->internal;

    /* read the curve prime and a */
    if (mp_init_multi(&prime, NULL, NULL, NULL, NULL, NULL) != MP_OKAY) {
        WOLFSSL_MSG("mp_init_multi error");
        return WOLFSSL_FAILURE;
    }

    if (mp_sub(&prime, p->y, p->y) != MP_OKAY) {
        WOLFSSL_MSG("mp_sub error");
        return WOLFSSL_FAILURE;
    }

    if (SetECPointExternal(a) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetECPointExternal error");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

void wolfSSL_EC_POINT_clear_free(WOLFSSL_EC_POINT *p)
{
    WOLFSSL_ENTER("wolfSSL_EC_POINT_clear_free");

    wolfSSL_EC_POINT_free(p);
}

/* return code compliant with OpenSSL :
 *   0 if equal, 1 if not and -1 in case of error
 */
int wolfSSL_EC_POINT_cmp(const WOLFSSL_EC_GROUP *group,
                         const WOLFSSL_EC_POINT *a, const WOLFSSL_EC_POINT *b,
                         WOLFSSL_BN_CTX *ctx)
{
    int ret;

    (void)ctx;

    WOLFSSL_ENTER("wolfSSL_EC_POINT_cmp");

    if (group == NULL || a == NULL || a->internal == NULL || b == NULL ||
        b->internal == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_POINT_cmp Bad arguments");
        return WOLFSSL_FATAL_ERROR;
    }

    ret = wc_ecc_cmp_point((ecc_point*)a->internal, (ecc_point*)b->internal);
    if (ret == MP_EQ)
        return 0;
    else if (ret == MP_LT || ret == MP_GT)
        return 1;

    return WOLFSSL_FATAL_ERROR;
}

int wolfSSL_EC_POINT_copy(WOLFSSL_EC_POINT *dest, const WOLFSSL_EC_POINT *src)
{
    WOLFSSL_ENTER("wolfSSL_EC_POINT_copy");

    if (!dest || !src) {
        return WOLFSSL_FAILURE;
    }

    if (setupPoint(src) != WOLFSSL_SUCCESS) {
        return WOLFSSL_FAILURE;
    }

    if (wc_ecc_copy_point((ecc_point*) dest->internal,
                          (ecc_point*) src->internal) != MP_OKAY) {
        return WOLFSSL_FAILURE;
    }

    dest->inSet = 1;

    if (SetECPointExternal(dest) != WOLFSSL_SUCCESS) {
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}
#endif /* HAVE_ECC */
#endif /* OPENSSL_EXTRA */

#if defined(HAVE_ECC) && (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL))
void wolfSSL_EC_POINT_free(WOLFSSL_EC_POINT *p)
{
    WOLFSSL_ENTER("wolfSSL_EC_POINT_free");

    if (p != NULL) {
        if (p->internal != NULL) {
            wc_ecc_del_point((ecc_point*)p->internal);
            p->internal = NULL;
        }

        wolfSSL_BN_free(p->X);
        wolfSSL_BN_free(p->Y);
        wolfSSL_BN_free(p->Z);
        p->X = NULL;
        p->Y = NULL;
        p->Z = NULL;
        p->inSet = p->exSet = 0;

        XFREE(p, NULL, DYNAMIC_TYPE_ECC);
        /* p = NULL, don't try to access or double free it */
    }
}
#endif

#ifdef OPENSSL_EXTRA
#ifdef HAVE_ECC
/* return code compliant with OpenSSL :
 *   1 if point at infinity, 0 else
 */
int wolfSSL_EC_POINT_is_at_infinity(const WOLFSSL_EC_GROUP *group,
                                    const WOLFSSL_EC_POINT *point)
{
    int ret;

    WOLFSSL_ENTER("wolfSSL_EC_POINT_is_at_infinity");

    if (group == NULL || point == NULL || point->internal == NULL) {
        WOLFSSL_MSG("wolfSSL_EC_POINT_is_at_infinity NULL error");
        return WOLFSSL_FAILURE;
    }

    if (setupPoint(point) != WOLFSSL_SUCCESS) {
        return WOLFSSL_FAILURE;
    }

    ret = wc_ecc_point_is_at_infinity((ecc_point*)point->internal);
    if (ret < 0) {
        WOLFSSL_MSG("ecc_point_is_at_infinity failure");
        return WOLFSSL_FAILURE;
    }

    return ret;
}

/* End EC_POINT */

#if !defined(HAVE_FIPS) || (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION>2))
size_t wolfSSL_EC_get_builtin_curves(WOLFSSL_EC_BUILTIN_CURVE *r, size_t nitems)
{
    size_t i, min_nitems;
#ifdef HAVE_SELFTEST
    size_t ecc_sets_count;
    for (i = 0; ecc_sets[i].size != 0 && ecc_sets[i].name != NULL; i++);
    ecc_sets_count = i;
#endif

    if (r == NULL || nitems == 0)
        return ecc_sets_count;

    min_nitems = nitems < ecc_sets_count ? nitems : ecc_sets_count;

    for (i = 0; i < min_nitems; i++) {
        r[i].nid = EccEnumToNID(ecc_sets[i].id);
        r[i].comment = wolfSSL_OBJ_nid2sn(r[i].nid);
    }

    return min_nitems;
}
#endif /* !HAVE_FIPS || HAVE_FIPS_VERSION > 2 */

/* Start ECDSA_SIG */
void wolfSSL_ECDSA_SIG_free(WOLFSSL_ECDSA_SIG *sig)
{
    WOLFSSL_ENTER("wolfSSL_ECDSA_SIG_free");

    if (sig) {
        wolfSSL_BN_free(sig->r);
        wolfSSL_BN_free(sig->s);

        XFREE(sig, NULL, DYNAMIC_TYPE_ECC);
    }
}

WOLFSSL_ECDSA_SIG *wolfSSL_ECDSA_SIG_new(void)
{
    WOLFSSL_ECDSA_SIG *sig;

    WOLFSSL_ENTER("wolfSSL_ECDSA_SIG_new");

    sig = (WOLFSSL_ECDSA_SIG*) XMALLOC(sizeof(WOLFSSL_ECDSA_SIG), NULL,
                                       DYNAMIC_TYPE_ECC);
    if (sig == NULL) {
        WOLFSSL_MSG("wolfSSL_ECDSA_SIG_new malloc ECDSA signature failure");
        return NULL;
    }

    sig->s = NULL;
    sig->r = wolfSSL_BN_new();
    if (sig->r == NULL) {
        WOLFSSL_MSG("wolfSSL_ECDSA_SIG_new malloc ECDSA r failure");
        wolfSSL_ECDSA_SIG_free(sig);
        return NULL;
    }

    sig->s = wolfSSL_BN_new();
    if (sig->s == NULL) {
        WOLFSSL_MSG("wolfSSL_ECDSA_SIG_new malloc ECDSA s failure");
        wolfSSL_ECDSA_SIG_free(sig);
        return NULL;
    }

    return sig;
}

/* return signature structure on success, NULL otherwise */
WOLFSSL_ECDSA_SIG *wolfSSL_ECDSA_do_sign(const unsigned char *d, int dlen,
                                         WOLFSSL_EC_KEY *key)
{
    WOLFSSL_ECDSA_SIG *sig = NULL;
    int     initTmpRng = 0;
    WC_RNG* rng = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG* tmpRNG = NULL;
#else
    WC_RNG  tmpRNG[1];
#endif

    WOLFSSL_ENTER("wolfSSL_ECDSA_do_sign");

    if (d == NULL || key == NULL || key->internal == NULL) {
        WOLFSSL_MSG("wolfSSL_ECDSA_do_sign Bad arguments");
        return NULL;
    }

    /* set internal key if not done */
    if (key->inSet == 0)
    {
        WOLFSSL_MSG("wolfSSL_ECDSA_do_sign No EC key internal set, do it");

        if (SetECKeyInternal(key) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("wolfSSL_ECDSA_do_sign SetECKeyInternal failed");
            return NULL;
        }
    }

#ifdef WOLFSSL_SMALL_STACK
    tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
    if (tmpRNG == NULL)
        return NULL;
#endif

    if (wc_InitRng(tmpRNG) == 0) {
        rng = tmpRNG;
        initTmpRng = 1;
    }
    else {
        WOLFSSL_MSG("wolfSSL_ECDSA_do_sign Bad RNG Init, trying global");
        if (initGlobalRNG == 0)
            WOLFSSL_MSG("wolfSSL_ECDSA_do_sign Global RNG no Init");
        else
            rng = &globalRNG;
    }

    if (rng) {
        mp_int sig_r, sig_s;

        if (mp_init_multi(&sig_r, &sig_s, NULL, NULL, NULL, NULL) == MP_OKAY) {
            if (wc_ecc_sign_hash_ex(d, dlen, rng, (ecc_key*)key->internal,
                                    &sig_r, &sig_s) != MP_OKAY) {
                WOLFSSL_MSG("wc_ecc_sign_hash_ex failed");
            }
            else {
                /* put signature blob in ECDSA structure */
                sig = wolfSSL_ECDSA_SIG_new();
                if (sig == NULL)
                    WOLFSSL_MSG("wolfSSL_ECDSA_SIG_new failed");
                else if (SetIndividualExternal(&(sig->r), &sig_r)!=WOLFSSL_SUCCESS){
                    WOLFSSL_MSG("ecdsa r key error");
                    wolfSSL_ECDSA_SIG_free(sig);
                    sig = NULL;
                }
                else if (SetIndividualExternal(&(sig->s), &sig_s)!=WOLFSSL_SUCCESS){
                    WOLFSSL_MSG("ecdsa s key error");
                    wolfSSL_ECDSA_SIG_free(sig);
                    sig = NULL;
                }

            }
            mp_free(&sig_r);
            mp_free(&sig_s);
        }
    }

    if (initTmpRng)
        wc_FreeRng(tmpRNG);
#ifdef WOLFSSL_SMALL_STACK
    XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif

    return sig;
}

/* return code compliant with OpenSSL :
 *   1 for a valid signature, 0 for an invalid signature and -1 on error
 */
int wolfSSL_ECDSA_do_verify(const unsigned char *d, int dlen,
                            const WOLFSSL_ECDSA_SIG *sig, WOLFSSL_EC_KEY *key)
{
    int check_sign = 0;

    WOLFSSL_ENTER("wolfSSL_ECDSA_do_verify");

    if (d == NULL || sig == NULL || key == NULL || key->internal == NULL) {
        WOLFSSL_MSG("wolfSSL_ECDSA_do_verify Bad arguments");
        return WOLFSSL_FATAL_ERROR;
    }

    /* set internal key if not done */
    if (key->inSet == 0)
    {
        WOLFSSL_MSG("No EC key internal set, do it");

        if (SetECKeyInternal(key) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetECKeyInternal failed");
            return WOLFSSL_FATAL_ERROR;
        }
    }

    if (wc_ecc_verify_hash_ex((mp_int*)sig->r->internal,
                              (mp_int*)sig->s->internal, d, dlen, &check_sign,
                              (ecc_key *)key->internal) != MP_OKAY) {
        WOLFSSL_MSG("wc_ecc_verify_hash failed");
        return WOLFSSL_FATAL_ERROR;
    }
    else if (check_sign == 0) {
        WOLFSSL_MSG("wc_ecc_verify_hash incorrect signature detected");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

WOLFSSL_ECDSA_SIG *wolfSSL_d2i_ECDSA_SIG(WOLFSSL_ECDSA_SIG **sig,
                                         const unsigned char **pp, long len)
{
    WOLFSSL_ECDSA_SIG *s = NULL;

    if (pp == NULL)
        return NULL;

    if (sig != NULL)
        s = *sig;
    if (s == NULL) {
        s = wolfSSL_ECDSA_SIG_new();
        if (s == NULL)
            return NULL;
    }

    /* DecodeECC_DSA_Sig calls mp_init, so free these */
    mp_free((mp_int*)s->r->internal);
    mp_free((mp_int*)s->s->internal);

    if (DecodeECC_DSA_Sig(*pp, (word32)len, (mp_int*)s->r->internal,
                                          (mp_int*)s->s->internal) != MP_OKAY) {
        if (sig == NULL || *sig == NULL)
            wolfSSL_ECDSA_SIG_free(s);
        return NULL;
    }

    *pp += len;
    if (sig != NULL)
        *sig = s;
    return s;
}

int wolfSSL_i2d_ECDSA_SIG(const WOLFSSL_ECDSA_SIG *sig, unsigned char **pp)
{
    word32 len;

    if (sig == NULL)
        return 0;

    /* ASN.1: SEQ + INT + INT
     *   ASN.1 Integer must be a positive value - prepend zero if number has
     *   top bit set.
     */
    len = 2 + mp_leading_bit((mp_int*)sig->r->internal) +
              mp_unsigned_bin_size((mp_int*)sig->r->internal) +
          2 + mp_leading_bit((mp_int*)sig->s->internal) +
              mp_unsigned_bin_size((mp_int*)sig->s->internal);
    /* Two bytes required for length if ASN.1 SEQ data greater than 127 bytes
     * and less than 256 bytes.
     */
    len = 1 + ((len > 127) ? 2 : 1) + len;
    if (pp != NULL && *pp != NULL) {
        if (StoreECC_DSA_Sig(*pp, &len, (mp_int*)sig->r->internal,
                                        (mp_int*)sig->s->internal) != MP_OKAY) {
            len = 0;
        }
        else
            *pp += len;
    }

    return (int)len;
}
/* End ECDSA_SIG */

/* Start ECDH */
/* return code compliant with OpenSSL :
 *   length of computed key if success, -1 if error
 */
int wolfSSL_ECDH_compute_key(void *out, size_t outlen,
                             const WOLFSSL_EC_POINT *pub_key,
                             WOLFSSL_EC_KEY *ecdh,
                             void *(*KDF) (const void *in, size_t inlen,
                                           void *out, size_t *outlen))
{
    word32 len;
    ecc_key* key;
    int ret;
#if defined(ECC_TIMING_RESISTANT) && !defined(HAVE_SELFTEST) \
    && !defined(HAVE_FIPS)
    int setGlobalRNG = 0;
#endif
    (void)KDF;

    WOLFSSL_ENTER("wolfSSL_ECDH_compute_key");

    if (out == NULL || pub_key == NULL || pub_key->internal == NULL ||
        ecdh == NULL || ecdh->internal == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FATAL_ERROR;
    }

    /* set internal key if not done */
    if (ecdh->inSet == 0)
    {
        WOLFSSL_MSG("No EC key internal set, do it");

        if (SetECKeyInternal(ecdh) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetECKeyInternal failed");
            return WOLFSSL_FATAL_ERROR;
        }
    }

    len = (word32)outlen;
    key = (ecc_key*)ecdh->internal;

#if defined(ECC_TIMING_RESISTANT) && !defined(HAVE_SELFTEST) \
    && !defined(HAVE_FIPS)
    if (key->rng == NULL) {
        if (initGlobalRNG == 0 && wolfSSL_RAND_Init() != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("No RNG to use");
            return WOLFSSL_FATAL_ERROR;
        }
        key->rng = &globalRNG;
        setGlobalRNG = 1;
    }
#endif
    ret = wc_ecc_shared_secret_ssh(key, (ecc_point*)pub_key->internal,
            (byte *)out, &len);
#if defined(ECC_TIMING_RESISTANT) && !defined(HAVE_SELFTEST) \
    && !defined(HAVE_FIPS)
    if (setGlobalRNG)
        key->rng = NULL;
#endif
    if (ret != MP_OKAY) {
        WOLFSSL_MSG("wc_ecc_shared_secret failed");
        return WOLFSSL_FATAL_ERROR;
    }

    return len;
}
/* End ECDH */

#if !defined(NO_FILESYSTEM)
/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
#ifndef NO_WOLFSSL_STUB
int wolfSSL_PEM_write_EC_PUBKEY(XFILE fp, WOLFSSL_EC_KEY *x)
{
    (void)fp;
    (void)x;
    WOLFSSL_STUB("PEM_write_EC_PUBKEY");
    WOLFSSL_MSG("wolfSSL_PEM_write_EC_PUBKEY not implemented");

    return WOLFSSL_FAILURE;
}
#endif

#ifndef NO_BIO

/* Uses the same format of input as wolfSSL_PEM_read_bio_PrivateKey but expects
 * the results to be an EC key.
 *
 * bio  structure to read EC private key from
 * ec   if not null is then set to the result
 * cb   password callback for reading PEM
 * pass password string
 *
 * returns a pointer to a new WOLFSSL_EC_KEY struct on success and NULL on fail
 */

WOLFSSL_EC_KEY* wolfSSL_PEM_read_bio_EC_PUBKEY(WOLFSSL_BIO* bio,
                                               WOLFSSL_EC_KEY** ec,
                                               pem_password_cb* cb, void *pass)
{
    WOLFSSL_EVP_PKEY* pkey;
    WOLFSSL_EC_KEY* local;

    WOLFSSL_ENTER("wolfSSL_PEM_read_bio_EC_PUBKEY");

    pkey = wolfSSL_PEM_read_bio_PUBKEY(bio, NULL, cb, pass);
    if (pkey == NULL) {
        return NULL;
    }

    /* Since the WOLFSSL_EC_KEY structure is being taken from WOLFSSL_EVP_PKEY the
     * flag indicating that the WOLFSSL_EC_KEY structure is owned should be FALSE
     * to avoid having it free'd */
    pkey->ownEcc = 0;
    local = pkey->ecc;
    if (ec != NULL) {
        *ec = local;
    }

    wolfSSL_EVP_PKEY_free(pkey);
    return local;
}

/* Reads a private EC key from a WOLFSSL_BIO into a WOLFSSL_EC_KEY.
 * Returns WOLFSSL_SUCCESS or WOLFSSL_FAILURE
 */
WOLFSSL_EC_KEY* wolfSSL_PEM_read_bio_ECPrivateKey(WOLFSSL_BIO* bio,
                                                  WOLFSSL_EC_KEY** ec,
                                                  pem_password_cb* cb,
                                                  void *pass)
{
    WOLFSSL_EVP_PKEY* pkey;
    WOLFSSL_EC_KEY* local;

    WOLFSSL_ENTER("wolfSSL_PEM_read_bio_ECPrivateKey");

    pkey = wolfSSL_PEM_read_bio_PrivateKey(bio, NULL, cb, pass);
    if (pkey == NULL) {
        return NULL;
    }

    /* Since the WOLFSSL_EC_KEY structure is being taken from WOLFSSL_EVP_PKEY the
     * flag indicating that the WOLFSSL_EC_KEY structure is owned should be FALSE
     * to avoid having it free'd */
    pkey->ownEcc = 0;
    local = pkey->ecc;
    if (ec != NULL) {
        *ec = local;
    }

    wolfSSL_EVP_PKEY_free(pkey);
    return local;
}
#endif /* !NO_BIO */
#endif /* NO_FILESYSTEM */

#if defined(WOLFSSL_KEY_GEN)
#ifndef NO_BIO
/* Takes a public WOLFSSL_EC_KEY and writes it out to WOLFSSL_BIO
 * Returns WOLFSSL_SUCCESS or WOLFSSL_FAILURE
 */
int wolfSSL_PEM_write_bio_EC_PUBKEY(WOLFSSL_BIO* bio, WOLFSSL_EC_KEY* ec)
{
    int ret = 0, der_max_len = 0, derSz = 0;
    byte *derBuf;
    WOLFSSL_EVP_PKEY* pkey;

    WOLFSSL_ENTER("wolfSSL_PEM_write_bio_EC_PUBKEY");

    if (bio == NULL || ec == NULL) {
        WOLFSSL_MSG("Bad Function Arguments");
        return WOLFSSL_FAILURE;
    }

    /* Initialize pkey structure */
    pkey = wolfSSL_EVP_PKEY_new_ex(bio->heap);
    if (pkey == NULL) {
        WOLFSSL_MSG("wolfSSL_EVP_PKEY_new_ex failed");
        return WOLFSSL_FAILURE;
    }

    /* Set pkey info */
    pkey->ecc    = ec;
    pkey->ownEcc = 0; /* pkey does not own ECC */
    pkey->type = EVP_PKEY_EC;

    /* 4 > size of pub, priv + ASN.1 additional information */
    der_max_len = 4 * wc_ecc_size((ecc_key*)ec->internal) + AES_BLOCK_SIZE;

    derBuf = (byte*)XMALLOC(der_max_len, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (derBuf == NULL) {
        WOLFSSL_MSG("Malloc failed");
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }

    /* convert key to der format */
    derSz = wc_EccPublicKeyToDer((ecc_key*)ec->internal, derBuf, der_max_len, 1);
    if (derSz < 0) {
        WOLFSSL_MSG("wc_EccPublicKeyToDer failed");
        XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }

    pkey->pkey.ptr = (char*)XMALLOC(derSz, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (pkey->pkey.ptr == NULL) {
        WOLFSSL_MSG("key malloc failed");
        XFREE(derBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }

    /* add der info to the evp key */
    pkey->pkey_sz = derSz;
    XMEMCPY(pkey->pkey.ptr, derBuf, derSz);
    XFREE(derBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);

    if((ret = wolfSSL_PEM_write_bio_PUBKEY(bio, pkey)) != WOLFSSL_SUCCESS){
        WOLFSSL_MSG("wolfSSL_PEM_write_bio_PUBKEY failed");
    }
    wolfSSL_EVP_PKEY_free(pkey);

    return ret;
}

/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_PEM_write_bio_ECPrivateKey(WOLFSSL_BIO* bio, WOLFSSL_EC_KEY* ec,
                                       const EVP_CIPHER* cipher,
                                       unsigned char* passwd, int len,
                                       pem_password_cb* cb, void* arg)
{
    int ret = 0, der_max_len = 0, derSz = 0;
    byte *derBuf;
    WOLFSSL_EVP_PKEY* pkey;
    WOLFSSL_ENTER("WOLFSSL_PEM_write_bio_ECPrivateKey");

    if (bio == NULL || ec == NULL) {
        WOLFSSL_MSG("Bad Function Arguments");
        return WOLFSSL_FAILURE;
    }

    /* Initialize pkey structure */
    pkey = wolfSSL_EVP_PKEY_new_ex(bio->heap);
    if (pkey == NULL) {
        WOLFSSL_MSG("wolfSSL_EVP_PKEY_new_ex failed");
        return WOLFSSL_FAILURE;
    }

    /* Set pkey info */
    pkey->ecc    = ec;
    pkey->ownEcc = 0; /* pkey does not own ECC */
    pkey->type = EVP_PKEY_EC;

    /* 4 > size of pub, priv + ASN.1 additional informations
     */
    der_max_len = 4 * wc_ecc_size((ecc_key*)ec->internal) + AES_BLOCK_SIZE;

    derBuf = (byte*)XMALLOC(der_max_len, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (derBuf == NULL) {
        WOLFSSL_MSG("Malloc failed");
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }

    /* convert key to der format */
    derSz = wc_EccKeyToDer((ecc_key*)ec->internal, derBuf, der_max_len);
    if (derSz < 0) {
        WOLFSSL_MSG("wc_EccKeyToDer failed");
        XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }

    pkey->pkey.ptr = (char*)XMALLOC(derSz, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (pkey->pkey.ptr == NULL) {
        WOLFSSL_MSG("key malloc failed");
        XFREE(derBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }

    /* add der info to the evp key */
    pkey->pkey_sz = derSz;
    XMEMCPY(pkey->pkey.ptr, derBuf, derSz);
    XFREE(derBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);

    ret = wolfSSL_PEM_write_bio_PrivateKey(bio, pkey, cipher, passwd, len,
                                        cb, arg);
    wolfSSL_EVP_PKEY_free(pkey);

    return ret;
}

#endif /* !NO_BIO */

/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_PEM_write_mem_ECPrivateKey(WOLFSSL_EC_KEY* ecc,
                                       const EVP_CIPHER* cipher,
                                       unsigned char* passwd, int passwdSz,
                                       unsigned char **pem, int *plen)
{
#if defined(WOLFSSL_PEM_TO_DER) || defined(WOLFSSL_DER_TO_PEM)
    byte *derBuf, *tmp, *cipherInfo = NULL;
    int  der_max_len = 0, derSz = 0;
    const int type = ECC_PRIVATEKEY_TYPE;
    const char* header = NULL;
    const char* footer = NULL;

    WOLFSSL_MSG("wolfSSL_PEM_write_mem_ECPrivateKey");

    if (pem == NULL || plen == NULL || ecc == NULL || ecc->internal == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }

    if (wc_PemGetHeaderFooter(type, &header, &footer) != 0)
        return WOLFSSL_FAILURE;

    if (ecc->inSet == 0) {
        WOLFSSL_MSG("No ECC internal set, do it");

        if (SetECKeyInternal(ecc) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetECKeyInternal failed");
            return WOLFSSL_FAILURE;
        }
    }

    /* 4 > size of pub, priv + ASN.1 additional information */
    der_max_len = 4 * wc_ecc_size((ecc_key*)ecc->internal) + AES_BLOCK_SIZE;

    derBuf = (byte*)XMALLOC(der_max_len, NULL, DYNAMIC_TYPE_DER);
    if (derBuf == NULL) {
        WOLFSSL_MSG("malloc failed");
        return WOLFSSL_FAILURE;
    }

    /* Key to DER */
    derSz = wc_EccKeyToDer((ecc_key*)ecc->internal, derBuf, der_max_len);
    if (derSz < 0) {
        WOLFSSL_MSG("wc_EccKeyToDer failed");
        XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
        return WOLFSSL_FAILURE;
    }

    /* encrypt DER buffer if required */
    if (passwd != NULL && passwdSz > 0 && cipher != NULL) {
        int ret;

        ret = EncryptDerKey(derBuf, &derSz, cipher,
                            passwd, passwdSz, &cipherInfo, der_max_len);
        if (ret != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("EncryptDerKey failed");
            XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
            return ret;
        }

        /* tmp buffer with a max size */
        *plen = (derSz * 2) + (int)XSTRLEN(header) + 1 +
            (int)XSTRLEN(footer) + 1 + HEADER_ENCRYPTED_KEY_SIZE;
    }
    else { /* tmp buffer with a max size */
        *plen = (derSz * 2) + (int)XSTRLEN(header) + 1 +
            (int)XSTRLEN(footer) + 1;
    }

    tmp = (byte*)XMALLOC(*plen, NULL, DYNAMIC_TYPE_PEM);
    if (tmp == NULL) {
        WOLFSSL_MSG("malloc failed");
        XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
        if (cipherInfo != NULL)
            XFREE(cipherInfo, NULL, DYNAMIC_TYPE_STRING);
        return WOLFSSL_FAILURE;
    }

    /* DER to PEM */
    *plen = wc_DerToPemEx(derBuf, derSz, tmp, *plen, cipherInfo, type);
    if (*plen <= 0) {
        WOLFSSL_MSG("wc_DerToPemEx failed");
        XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
        XFREE(tmp, NULL, DYNAMIC_TYPE_PEM);
        if (cipherInfo != NULL)
            XFREE(cipherInfo, NULL, DYNAMIC_TYPE_STRING);
        return WOLFSSL_FAILURE;
    }
    XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
    if (cipherInfo != NULL)
        XFREE(cipherInfo, NULL, DYNAMIC_TYPE_STRING);

    *pem = (byte*)XMALLOC((*plen)+1, NULL, DYNAMIC_TYPE_KEY);
    if (*pem == NULL) {
        WOLFSSL_MSG("malloc failed");
        XFREE(tmp, NULL, DYNAMIC_TYPE_PEM);
        return WOLFSSL_FAILURE;
    }
    XMEMSET(*pem, 0, (*plen)+1);

    if (XMEMCPY(*pem, tmp, *plen) == NULL) {
        WOLFSSL_MSG("XMEMCPY failed");
        XFREE(pem, NULL, DYNAMIC_TYPE_KEY);
        XFREE(tmp, NULL, DYNAMIC_TYPE_PEM);
        return WOLFSSL_FAILURE;
    }
    XFREE(tmp, NULL, DYNAMIC_TYPE_PEM);

    return WOLFSSL_SUCCESS;
#else
    (void)ecc;
    (void)cipher;
    (void)passwd;
    (void)passwdSz;
    (void)pem;
    (void)plen;
    return WOLFSSL_FAILURE;
#endif /* WOLFSSL_PEM_TO_DER || WOLFSSL_DER_TO_PEM */
}

#ifndef NO_FILESYSTEM
/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_PEM_write_ECPrivateKey(XFILE fp, WOLFSSL_EC_KEY *ecc,
                                   const EVP_CIPHER *enc,
                                   unsigned char *kstr, int klen,
                                   pem_password_cb *cb, void *u)
{
    byte *pem;
    int  plen, ret;

    (void)cb;
    (void)u;

    WOLFSSL_MSG("wolfSSL_PEM_write_ECPrivateKey");

    if (fp == XBADFILE || ecc == NULL || ecc->internal == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }

    ret = wolfSSL_PEM_write_mem_ECPrivateKey(ecc, enc, kstr, klen, &pem, &plen);
    if (ret != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("wolfSSL_PEM_write_mem_ECPrivateKey failed");
        return WOLFSSL_FAILURE;
    }

    ret = (int)XFWRITE(pem, plen, 1, fp);
    if (ret != 1) {
        WOLFSSL_MSG("ECC private key file write failed");
        return WOLFSSL_FAILURE;
    }

    XFREE(pem, NULL, DYNAMIC_TYPE_KEY);
    return WOLFSSL_SUCCESS;
}

#endif /* NO_FILESYSTEM */
#endif /* defined(WOLFSSL_KEY_GEN) */

#endif /* HAVE_ECC */


#ifndef NO_DSA

#if defined(WOLFSSL_KEY_GEN)
#ifndef NO_BIO

/* Takes a DSA Privatekey and writes it out to a WOLFSSL_BIO
 * Returns WOLFSSL_SUCCESS or WOLFSSL_FAILURE
 */
int wolfSSL_PEM_write_bio_DSAPrivateKey(WOLFSSL_BIO* bio, WOLFSSL_DSA* dsa,
                                       const EVP_CIPHER* cipher,
                                       unsigned char* passwd, int len,
                                       pem_password_cb* cb, void* arg)
{
    int ret = 0, der_max_len = 0, derSz = 0;
    byte *derBuf;
    WOLFSSL_EVP_PKEY* pkey;

    WOLFSSL_ENTER("wolfSSL_PEM_write_bio_DSAPrivateKey");

    if (bio == NULL || dsa == NULL) {
        WOLFSSL_MSG("Bad Function Arguments");
        return WOLFSSL_FAILURE;
    }

    pkey = wolfSSL_EVP_PKEY_new_ex(bio->heap);
    if (pkey == NULL) {
        WOLFSSL_MSG("wolfSSL_EVP_PKEY_new_ex failed");
        return WOLFSSL_FAILURE;
    }

    pkey->type   = EVP_PKEY_DSA;
    pkey->dsa    = dsa;
    pkey->ownDsa = 0;

    /* 4 > size of pub, priv, p, q, g + ASN.1 additional information */
    der_max_len = 4 * wolfSSL_BN_num_bytes(dsa->g) + AES_BLOCK_SIZE;

    derBuf = (byte*)XMALLOC(der_max_len, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (derBuf == NULL) {
        WOLFSSL_MSG("Malloc failed");
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }

    /* convert key to der format */
    derSz = wc_DsaKeyToDer((DsaKey*)dsa->internal, derBuf, der_max_len);
    if (derSz < 0) {
        WOLFSSL_MSG("wc_DsaKeyToDer failed");
        XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }

    pkey->pkey.ptr = (char*)XMALLOC(derSz, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (pkey->pkey.ptr == NULL) {
        WOLFSSL_MSG("key malloc failed");
        XFREE(derBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }

    /* add der info to the evp key */
    pkey->pkey_sz = derSz;
    XMEMCPY(pkey->pkey.ptr, derBuf, derSz);
    XFREE(derBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);

    ret = wolfSSL_PEM_write_bio_PrivateKey(bio, pkey, cipher, passwd, len,
                                        cb, arg);
    wolfSSL_EVP_PKEY_free(pkey);

    return ret;
}

#ifndef HAVE_SELFTEST
/* Takes a DSA public key and writes it out to a WOLFSSL_BIO
 * Returns WOLFSSL_SUCCESS or WOLFSSL_FAILURE
 */
int wolfSSL_PEM_write_bio_DSA_PUBKEY(WOLFSSL_BIO* bio, WOLFSSL_DSA* dsa)
{
    int ret = 0, derMax = 0, derSz = 0;
    byte *derBuf;
    WOLFSSL_EVP_PKEY* pkey;

    WOLFSSL_ENTER("wolfSSL_PEM_write_bio_DSA_PUBKEY");

    if (bio == NULL || dsa == NULL) {
        WOLFSSL_MSG("Bad function arguements");
        return WOLFSSL_FAILURE;
    }

    pkey = wolfSSL_EVP_PKEY_new_ex(bio->heap);
    if (pkey == NULL) {
        WOLFSSL_MSG("wolfSSL_EVP_PKEY_new_ex failed");
        return WOLFSSL_FAILURE;
    }

    pkey->type   = EVP_PKEY_DSA;
    pkey->dsa    = dsa;
    pkey->ownDsa = 0;

    /* 4 > size of pub, priv, p, q, g + ASN.1 additional information */
    derMax = 4 * wolfSSL_BN_num_bytes(dsa->g) + AES_BLOCK_SIZE;

    derBuf = (byte*)XMALLOC(derMax, bio->heap, DYNAMIC_TYPE_DER);
    if (derBuf == NULL) {
        WOLFSSL_MSG("malloc failed");
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }

    /* Key to DER */
    derSz = wc_DsaKeyToPublicDer((DsaKey*)dsa->internal, derBuf, derMax);
    if (derSz < 0) {
        WOLFSSL_MSG("wc_DsaKeyToDer failed");
        XFREE(derBuf, bio->heap, DYNAMIC_TYPE_DER);
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }

    pkey->pkey.ptr = (char*)XMALLOC(derSz, bio->heap, DYNAMIC_TYPE_DER);

    if (pkey->pkey.ptr == NULL) {
        WOLFSSL_MSG("key malloc failed");
        XFREE(derBuf, bio->heap, DYNAMIC_TYPE_DER);
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }
    pkey->pkey_sz = derSz;
    XMEMSET(pkey->pkey.ptr, 0, derSz);

    if (XMEMCPY(pkey->pkey.ptr, derBuf, derSz) == NULL) {
        WOLFSSL_MSG("XMEMCPY failed");
        XFREE(derBuf, bio->heap, DYNAMIC_TYPE_DER);
        XFREE(pkey->pkey.ptr, bio->heap, DYNAMIC_TYPE_DER);
        wolfSSL_EVP_PKEY_free(pkey);
        return WOLFSSL_FAILURE;
    }
    XFREE(derBuf, bio->heap, DYNAMIC_TYPE_DER);
    ret = wolfSSL_PEM_write_bio_PUBKEY(bio, pkey);
    wolfSSL_EVP_PKEY_free(pkey);
    return ret;
}
#endif /* HAVE_SELFTEST */
#endif /* !NO_BIO */

/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_PEM_write_mem_DSAPrivateKey(WOLFSSL_DSA* dsa,
                                        const EVP_CIPHER* cipher,
                                        unsigned char* passwd, int passwdSz,
                                        unsigned char **pem, int *plen)
{
#if defined(WOLFSSL_PEM_TO_DER) || defined(WOLFSSL_DER_TO_PEM)
    byte *derBuf, *tmp, *cipherInfo = NULL;
    int  der_max_len = 0, derSz = 0;
    const int type = DSA_PRIVATEKEY_TYPE;
    const char* header = NULL;
    const char* footer = NULL;

    WOLFSSL_MSG("wolfSSL_PEM_write_mem_DSAPrivateKey");

    if (pem == NULL || plen == NULL || dsa == NULL || dsa->internal == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }

    if (wc_PemGetHeaderFooter(type, &header, &footer) != 0)
        return WOLFSSL_FAILURE;

    if (dsa->inSet == 0) {
        WOLFSSL_MSG("No DSA internal set, do it");

        if (SetDsaInternal(dsa) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetDsaInternal failed");
            return WOLFSSL_FAILURE;
        }
    }

    /* 4 > size of pub, priv, p, q, g + ASN.1 additional information */
    der_max_len = 4 * wolfSSL_BN_num_bytes(dsa->g) + AES_BLOCK_SIZE;

    derBuf = (byte*)XMALLOC(der_max_len, NULL, DYNAMIC_TYPE_DER);
    if (derBuf == NULL) {
        WOLFSSL_MSG("malloc failed");
        return WOLFSSL_FAILURE;
    }

    /* Key to DER */
    derSz = wc_DsaKeyToDer((DsaKey*)dsa->internal, derBuf, der_max_len);
    if (derSz < 0) {
        WOLFSSL_MSG("wc_DsaKeyToDer failed");
        XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
        return WOLFSSL_FAILURE;
    }

    /* encrypt DER buffer if required */
    if (passwd != NULL && passwdSz > 0 && cipher != NULL) {
        int ret;

        ret = EncryptDerKey(derBuf, &derSz, cipher,
                            passwd, passwdSz, &cipherInfo, der_max_len);
        if (ret != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("EncryptDerKey failed");
            XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
            return ret;
        }

        /* tmp buffer with a max size */
        *plen = (derSz * 2) + (int)XSTRLEN(header) + 1 +
            (int)XSTRLEN(footer) + 1 + HEADER_ENCRYPTED_KEY_SIZE;
    }
    else { /* tmp buffer with a max size */
        *plen = (derSz * 2) + (int)XSTRLEN(header) + 1 +
            (int)XSTRLEN(footer) + 1;
    }

    tmp = (byte*)XMALLOC(*plen, NULL, DYNAMIC_TYPE_PEM);
    if (tmp == NULL) {
        WOLFSSL_MSG("malloc failed");
        XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
        if (cipherInfo != NULL)
            XFREE(cipherInfo, NULL, DYNAMIC_TYPE_STRING);
        return WOLFSSL_FAILURE;
    }

    /* DER to PEM */
    *plen = wc_DerToPemEx(derBuf, derSz, tmp, *plen, cipherInfo, type);
    if (*plen <= 0) {
        WOLFSSL_MSG("wc_DerToPemEx failed");
        XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
        XFREE(tmp, NULL, DYNAMIC_TYPE_PEM);
        if (cipherInfo != NULL)
            XFREE(cipherInfo, NULL, DYNAMIC_TYPE_STRING);
        return WOLFSSL_FAILURE;
    }
    XFREE(derBuf, NULL, DYNAMIC_TYPE_DER);
    if (cipherInfo != NULL)
        XFREE(cipherInfo, NULL, DYNAMIC_TYPE_STRING);

    *pem = (byte*)XMALLOC((*plen)+1, NULL, DYNAMIC_TYPE_KEY);
    if (*pem == NULL) {
        WOLFSSL_MSG("malloc failed");
        XFREE(tmp, NULL, DYNAMIC_TYPE_PEM);
        return WOLFSSL_FAILURE;
    }
    XMEMSET(*pem, 0, (*plen)+1);

    if (XMEMCPY(*pem, tmp, *plen) == NULL) {
        WOLFSSL_MSG("XMEMCPY failed");
        XFREE(pem, NULL, DYNAMIC_TYPE_KEY);
        XFREE(tmp, NULL, DYNAMIC_TYPE_PEM);
        return WOLFSSL_FAILURE;
    }
    XFREE(tmp, NULL, DYNAMIC_TYPE_PEM);

    return WOLFSSL_SUCCESS;
#else
    (void)dsa;
    (void)cipher;
    (void)passwd;
    (void)passwdSz;
    (void)pem;
    (void)plen;
    return WOLFSSL_FAILURE;
#endif /* WOLFSSL_PEM_TO_DER || WOLFSSL_DER_TO_PEM */
}

#ifndef NO_FILESYSTEM
/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_PEM_write_DSAPrivateKey(XFILE fp, WOLFSSL_DSA *dsa,
                                    const EVP_CIPHER *enc,
                                    unsigned char *kstr, int klen,
                                    pem_password_cb *cb, void *u)
{
    byte *pem;
    int  plen, ret;

    (void)cb;
    (void)u;

    WOLFSSL_MSG("wolfSSL_PEM_write_DSAPrivateKey");

    if (fp == XBADFILE || dsa == NULL || dsa->internal == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }

    ret = wolfSSL_PEM_write_mem_DSAPrivateKey(dsa, enc, kstr, klen, &pem, &plen);
    if (ret != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("wolfSSL_PEM_write_mem_DSAPrivateKey failed");
        return WOLFSSL_FAILURE;
    }

    ret = (int)XFWRITE(pem, plen, 1, fp);
    if (ret != 1) {
        WOLFSSL_MSG("DSA private key file write failed");
        return WOLFSSL_FAILURE;
    }

    XFREE(pem, NULL, DYNAMIC_TYPE_KEY);
    return WOLFSSL_SUCCESS;
}

#endif /* NO_FILESYSTEM */
#endif /* defined(WOLFSSL_KEY_GEN) */

#ifndef NO_FILESYSTEM
/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
#ifndef NO_WOLFSSL_STUB
int wolfSSL_PEM_write_DSA_PUBKEY(XFILE fp, WOLFSSL_DSA *x)
{
    (void)fp;
    (void)x;
    WOLFSSL_STUB("PEM_write_DSA_PUBKEY");
    WOLFSSL_MSG("wolfSSL_PEM_write_DSA_PUBKEY not implemented");

    return WOLFSSL_FAILURE;
}
#endif
#endif /* NO_FILESYSTEM */

#endif /* #ifndef NO_DSA */

#ifndef NO_BIO

static int pem_read_bio_key(WOLFSSL_BIO* bio, pem_password_cb* cb, void* pass,
                            int keyType, int* eccFlag, DerBuffer** der)
{
#ifdef WOLFSSL_SMALL_STACK
    EncryptedInfo* info = NULL;
#else
    EncryptedInfo info[1];
#endif /* WOLFSSL_SMALL_STACK */
    pem_password_cb* localCb = NULL;
    char* mem = NULL;
    int memSz = 0;
    int ret;

    if(cb) {
        localCb = cb;
    } else {
        if(pass) {
            localCb = wolfSSL_PEM_def_callback;
        }
    }

    if ((ret = wolfSSL_BIO_pending(bio)) > 0) {
        memSz = ret;
        mem = (char*)XMALLOC(memSz, bio->heap, DYNAMIC_TYPE_OPENSSL);
        if (mem == NULL) {
            WOLFSSL_MSG("Memory error");
            ret = MEMORY_E;
        }
        if (ret >= 0) {
            if ((ret = wolfSSL_BIO_read(bio, mem, memSz)) <= 0) {
                XFREE(mem, bio->heap, DYNAMIC_TYPE_OPENSSL);
                mem = NULL;
                ret = MEMORY_E;
            }
        }
    }
    else if (bio->type == WOLFSSL_BIO_FILE) {
        int sz  = 100; /* read from file by 100 byte chunks */
        int idx = 0;
        char* tmp = (char*)XMALLOC(sz, bio->heap, DYNAMIC_TYPE_OPENSSL);
        memSz = 0;
        if (tmp == NULL) {
            WOLFSSL_MSG("Memory error");
            ret = MEMORY_E;
        }

        while (ret >= 0 && (sz = wolfSSL_BIO_read(bio, tmp, sz)) > 0) {
            char* newMem;
            if (memSz + sz < 0) {
                /* sanity check */
                break;
            }
            newMem = (char*)XREALLOC(mem, memSz + sz, bio->heap,
                    DYNAMIC_TYPE_OPENSSL);
            if (newMem == NULL) {
                WOLFSSL_MSG("Memory error");
                XFREE(mem, bio->heap, DYNAMIC_TYPE_OPENSSL);
                mem = NULL;
                XFREE(tmp, bio->heap, DYNAMIC_TYPE_OPENSSL);
                tmp = NULL;
                ret = MEMORY_E;
                break;
            }
            mem = newMem;
            XMEMCPY(mem + idx, tmp, sz);
            memSz += sz;
            idx   += sz;
            sz = 100; /* read another 100 byte chunk from file */
        }
        XFREE(tmp, bio->heap, DYNAMIC_TYPE_OPENSSL);
        tmp = NULL;
        if (memSz <= 0) {
            WOLFSSL_MSG("No data to read from bio");
            if (mem != NULL) {
                XFREE(mem, bio->heap, DYNAMIC_TYPE_OPENSSL);
                mem = NULL;
            }
            ret = BUFFER_E;
        }
    }
    else {
        WOLFSSL_MSG("No data to read from bio");
        ret = NOT_COMPILED_IN;
    }

#ifdef WOLFSSL_SMALL_STACK
    if (ret >= 0) {
        info = (EncryptedInfo*)XMALLOC(sizeof(EncryptedInfo), NULL,
                                       DYNAMIC_TYPE_TMP_BUFFER);
        if (info == NULL) {
            WOLFSSL_MSG("Error getting memory for EncryptedInfo structure");
            XFREE(mem, bio->heap, DYNAMIC_TYPE_OPENSSL);
            mem = NULL;
            ret = MEMORY_E;
        }
    }
#endif

    if (ret >= 0) {
        XMEMSET(info, 0, sizeof(EncryptedInfo));
        info->passwd_cb       = localCb;
        info->passwd_userdata = pass;
        ret = PemToDer((const unsigned char*)mem, memSz, keyType, der,
            NULL, info, eccFlag);

        if (ret < 0) {
            WOLFSSL_MSG("Bad Pem To Der");
        }
        else {
            /* write left over data back to bio */
            if ((memSz - (int)info->consumed) > 0 &&
                    bio->type != WOLFSSL_BIO_FILE) {
                if (wolfSSL_BIO_write(bio, mem + (int)info->consumed,
                                       memSz - (int)info->consumed) <= 0) {
                    WOLFSSL_MSG("Unable to advance bio read pointer");
                }
            }
        }
    }

#ifdef WOLFSSL_SMALL_STACK
    XFREE(info, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
    XFREE(mem, bio->heap, DYNAMIC_TYPE_OPENSSL);

    return ret;
}

WOLFSSL_EVP_PKEY* wolfSSL_PEM_read_bio_PrivateKey(WOLFSSL_BIO* bio,
                                                  WOLFSSL_EVP_PKEY** key,
                                                  pem_password_cb* cb,
                                                  void* pass)
{
    WOLFSSL_EVP_PKEY* pkey = NULL;
    DerBuffer*         der = NULL;
    int             keyFormat = 0;
    int                 type = -1;

    WOLFSSL_ENTER("wolfSSL_PEM_read_bio_PrivateKey");

    if (bio == NULL)
        return pkey;

    if (pem_read_bio_key(bio, cb, pass, PRIVATEKEY_TYPE, &keyFormat,
                                                                   &der) >= 0) {
        const unsigned char* ptr = der->buffer;

        if (keyFormat) {
            /* keyFormat is Key_Sum enum */
            if (keyFormat == RSAk)
                type = EVP_PKEY_RSA;
            else if (keyFormat == ECDSAk)
                type =  EVP_PKEY_EC;
            else if (keyFormat == DSAk)
                type = EVP_PKEY_DSA;
            else if (keyFormat == DHk)
                type = EVP_PKEY_DH;
        }
        else {
            /* Default to RSA if format is not set */
            type = EVP_PKEY_RSA;
        }

        /* handle case where reuse is attempted */
        if (key != NULL && *key != NULL)
            pkey = *key;

        wolfSSL_d2i_PrivateKey(type, &pkey, &ptr, der->length);
        if (pkey == NULL) {
            WOLFSSL_MSG("Error loading DER buffer into WOLFSSL_EVP_PKEY");
        }
    }

    FreeDer(&der);

    if (key != NULL && pkey != NULL)
        *key = pkey;

    WOLFSSL_LEAVE("wolfSSL_PEM_read_bio_PrivateKey", 0);

    return pkey;
}

WOLFSSL_EVP_PKEY *wolfSSL_PEM_read_bio_PUBKEY(WOLFSSL_BIO* bio,
                                              WOLFSSL_EVP_PKEY **key,
                                              pem_password_cb *cb, void *pass)
{
    WOLFSSL_EVP_PKEY* pkey = NULL;
    DerBuffer*        der = NULL;
    int               keyFormat = 0;

    WOLFSSL_ENTER("wolfSSL_PEM_read_bio_PUBKEY");

    if (bio == NULL)
        return pkey;

    if (pem_read_bio_key(bio, cb, pass, PUBLICKEY_TYPE, &keyFormat, &der) >= 0) {
        const unsigned char* ptr = der->buffer;

        /* handle case where reuse is attempted */
        if (key != NULL && *key != NULL)
            pkey = *key;

        wolfSSL_d2i_PUBKEY(&pkey, &ptr, der->length);
        if (pkey == NULL) {
            WOLFSSL_MSG("Error loading DER buffer into WOLFSSL_EVP_PKEY");
        }
    }

    FreeDer(&der);

    if (key != NULL && pkey != NULL)
        *key = pkey;

    WOLFSSL_LEAVE("wolfSSL_PEM_read_bio_PUBKEY", 0);

    return pkey;
}


#if (defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)) && !defined(NO_RSA)
/* Uses the same format of input as wolfSSL_PEM_read_bio_PrivateKey but expects
 * the results to be an RSA key.
 *
 * bio  structure to read RSA private key from
 * rsa  if not null is then set to the result
 * cb   password callback for reading PEM
 * pass password string
 *
 * returns a pointer to a new WOLFSSL_RSA structure on success and NULL on fail
 */
WOLFSSL_RSA* wolfSSL_PEM_read_bio_RSAPrivateKey(WOLFSSL_BIO* bio,
        WOLFSSL_RSA** rsa, pem_password_cb* cb, void* pass)
{
    WOLFSSL_EVP_PKEY* pkey;
    WOLFSSL_RSA* local;

    WOLFSSL_ENTER("PEM_read_bio_RSAPrivateKey");

    pkey = wolfSSL_PEM_read_bio_PrivateKey(bio, NULL, cb, pass);
    if (pkey == NULL) {
        return NULL;
    }

    /* Since the WOLFSSL_RSA structure is being taken from WOLFSSL_EVP_PEKY the
     * flag indicating that the WOLFSSL_RSA structure is owned should be FALSE
     * to avoid having it free'd */
    pkey->ownRsa = 0;
    local = pkey->rsa;
    if (rsa != NULL) {
        *rsa = local;
    }

    wolfSSL_EVP_PKEY_free(pkey);
    return local;
}
#endif /* OPENSSL_EXTRA || OPENSSL_ALL || !NO_RSA */

#if (defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)) && (!defined(NO_CERTS) && \
       !defined(NO_FILESYSTEM) && !defined(NO_DSA) && defined(WOLFSSL_KEY_GEN))
/* Uses the same format of input as wolfSSL_PEM_read_bio_PrivateKey but expects
 * the results to be an DSA key.
 *
 * bio  structure to read DSA private key from
 * dsa  if not null is then set to the result
 * cb   password callback for reading PEM
 * pass password string
 *
 * returns a pointer to a new WOLFSSL_DSA structure on success and NULL on fail
 */
WOLFSSL_DSA* wolfSSL_PEM_read_bio_DSAPrivateKey(WOLFSSL_BIO* bio,
                                                WOLFSSL_DSA** dsa,
                                                pem_password_cb* cb,void *pass)
{
    WOLFSSL_EVP_PKEY* pkey = NULL;
    WOLFSSL_DSA* local;
    WOLFSSL_ENTER("wolfSSL_PEM_read_bio_DSAPrivateKey");


    pkey = wolfSSL_PEM_read_bio_PrivateKey(bio, NULL, cb, pass);
    if (pkey == NULL) {
        WOLFSSL_MSG("Error in PEM_read_bio_PrivateKey");
         return NULL;
     }
     /* Since the WOLFSSL_DSA structure is being taken from WOLFSSL_EVP_PKEY the
     * flag indicating that the WOLFSSL_DSA structure is owned should be FALSE
     * to avoid having it free'd */
    pkey->ownDsa = 0;
    local = pkey->dsa;
    if (dsa != NULL) {
        *dsa = local;
    }
     wolfSSL_EVP_PKEY_free(pkey);
    return local;
}

/* Reads an DSA public key from a WOLFSSL_BIO into a WOLFSSL_DSA.
 * Returns WOLFSSL_SUCCESS or WOLFSSL_FAILURE
 */
WOLFSSL_DSA *wolfSSL_PEM_read_bio_DSA_PUBKEY(WOLFSSL_BIO* bio,WOLFSSL_DSA** dsa,
                                                pem_password_cb* cb, void *pass)
{
    WOLFSSL_EVP_PKEY* pkey;
    WOLFSSL_DSA* local;
    WOLFSSL_ENTER("wolfSSL_PEM_read_bio_DSA_PUBKEY");

    pkey = wolfSSL_PEM_read_bio_PUBKEY(bio, NULL, cb, pass);
    if (pkey == NULL) {
        WOLFSSL_MSG("wolfSSL_PEM_read_bio_PUBKEY failed");
        return NULL;
    }

    /* Since the WOLFSSL_DSA structure is being taken from WOLFSSL_EVP_PKEY the
     * flag indicating that the WOLFSSL_DSA structure is owned should be FALSE
     * to avoid having it free'd */
    pkey->ownDsa = 0;
    local = pkey->dsa;
    if (dsa != NULL) {
        *dsa = local;
    }

    wolfSSL_EVP_PKEY_free(pkey);
    return local;
}
#endif

#ifdef HAVE_ECC
/* returns a new WOLFSSL_EC_GROUP structure on success and NULL on fail */
WOLFSSL_EC_GROUP* wolfSSL_PEM_read_bio_ECPKParameters(WOLFSSL_BIO* bio,
        WOLFSSL_EC_GROUP** group, pem_password_cb* cb, void* pass)
{
    WOLFSSL_EVP_PKEY* pkey;
    WOLFSSL_EC_GROUP* ret = NULL;

    /* check on if bio is null is done in wolfSSL_PEM_read_bio_PrivateKey */
    pkey = wolfSSL_PEM_read_bio_PrivateKey(bio, NULL, cb, pass);
    if (pkey != NULL) {
        if (pkey->type != EVP_PKEY_EC) {
            WOLFSSL_MSG("Unexpected key type");
        }
        else {
            ret = (WOLFSSL_EC_GROUP*)wolfSSL_EC_KEY_get0_group(pkey->ecc);

            /* set ecc group to null so it is not free'd when pkey is free'd */
            pkey->ecc->group = NULL;
        }
    }

    (void)group;
    wolfSSL_EVP_PKEY_free(pkey);
    return ret;
}
#endif /* HAVE_ECC */

#endif /* !NO_BIO */

#if !defined(NO_FILESYSTEM)
WOLFSSL_EVP_PKEY *wolfSSL_PEM_read_PUBKEY(XFILE fp, EVP_PKEY **x,
                                          pem_password_cb *cb, void *u)
{
    (void)fp;
    (void)x;
    (void)cb;
    (void)u;

    WOLFSSL_MSG("wolfSSL_PEM_read_PUBKEY not implemented");

    return NULL;
}
#endif /* NO_FILESYSTEM */

#ifndef NO_RSA

#ifndef NO_BIO
#if defined(XSNPRINTF) && !defined(HAVE_FAST_RSA)
/* snprintf() must be available */

/******************************************************************************
* wolfSSL_RSA_print - writes the human readable form of RSA to bio
*
* RETURNS:
* returns WOLFSSL_SUCCESS on success, otherwise returns WOLFSSL_FAILURE
*/
int wolfSSL_RSA_print(WOLFSSL_BIO* bio, WOLFSSL_RSA* rsa, int offset)
{
    char tmp[100] = {0};
    word32 idx = 0;
    int  sz = 0;
    byte lbit = 0;
    int  rawLen = 0;
    byte* rawKey = NULL;
    RsaKey* iRsa = NULL;
    int i = 0;
    mp_int *rsaElem = NULL;
    const char *rsaStr[] = {
                          "Modulus:",
                          "PublicExponent:",
                          "PrivateExponent:",
                          "Prime1:",
                          "Prime2:",
                          "Exponent1:",
                          "Exponent2:",
                          "Coefficient:"
                        };

    WOLFSSL_ENTER("wolfSSL_RSA_print");
    (void)offset;

    if (bio == NULL || rsa == NULL) {
        return WOLFSSL_FATAL_ERROR;
    }

    if ((sz = wolfSSL_RSA_size(rsa)) < 0) {
        WOLFSSL_MSG("Error getting RSA key size");
        return WOLFSSL_FAILURE;
    }
    iRsa = (RsaKey*)rsa->internal;

    XSNPRINTF(tmp, sizeof(tmp) - 1, "\n%s: (%d bit)",
            "RSA Private-Key", 8 * sz);
    tmp[sizeof(tmp) - 1] = '\0';
    if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
        return WOLFSSL_FAILURE;
    }

    for (i=0; i<RSA_INTS; i++) {
        switch(i) {
            case 0:
                /* Print out modulus */
                rsaElem = &iRsa->n;
                break;
            case 1:
                rsaElem = &iRsa->e;
                break;
            case 2:
                rsaElem = &iRsa->d;
                break;
            case 3:
                rsaElem = &iRsa->p;
                break;
            case 4:
                rsaElem = &iRsa->q;
                break;
            case 5:
                rsaElem = &iRsa->dP;
                break;
            case 6:
                rsaElem = &iRsa->dQ;
                break;
            case 7:
                rsaElem = &iRsa->u;
                break;
            default:
                WOLFSSL_MSG("Bad index value");
        }

        if (i == 1) {
            /* Print out exponent values */
            rawLen = mp_unsigned_bin_size(rsaElem);
            if (rawLen < 0) {
                WOLFSSL_MSG("Error getting exponent size");
                return WOLFSSL_FAILURE;
            }

            if ((word32)rawLen < sizeof(word32)) {
                rawLen = sizeof(word32);
            }
            rawKey = (byte*)XMALLOC(rawLen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            if (rawKey == NULL) {
                WOLFSSL_MSG("Memory error");
                return WOLFSSL_FAILURE;
            }
            XMEMSET(rawKey, 0, rawLen);
            if (mp_to_unsigned_bin(rsaElem, rawKey) < 0) {
                XFREE(rawKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                return WOLFSSL_FAILURE;
            }
            if ((word32)rawLen <= sizeof(word32)) {
                idx = *(word32*)rawKey;
                #ifdef BIG_ENDIAN_ORDER
                    idx = ByteReverseWord32(idx);
                #endif
            }
            XSNPRINTF(tmp, sizeof(tmp) - 1, "\nExponent: %d (0x%x)", idx, idx);
            if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
                XFREE(rawKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                return WOLFSSL_FAILURE;
            }
            XFREE(rawKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        }
        else {
            XSNPRINTF(tmp, sizeof(tmp) - 1, "\n%s\n    ", rsaStr[i]);
            tmp[sizeof(tmp) - 1] = '\0';
            if (mp_leading_bit(rsaElem)) {
                lbit = 1;
                XSTRNCAT(tmp, "00", 3);
            }

            rawLen = mp_unsigned_bin_size(rsaElem);
            rawKey = (byte*)XMALLOC(rawLen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            if (rawKey == NULL) {
                WOLFSSL_MSG("Memory error");
                return WOLFSSL_FAILURE;
            }
            if (mp_to_unsigned_bin(rsaElem, rawKey) < 0) {
                XFREE(rawKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                return WOLFSSL_FAILURE;
            }
            for (idx = 0; idx < (word32)rawLen; idx++) {
                char val[5];
                int  valSz = 5;

                if ((idx == 0) && !lbit) {
                    XSNPRINTF(val, valSz - 1, "%02x", rawKey[idx]);
                }
                else if ((idx != 0) && (((idx + lbit) % 15) == 0)) {
                    tmp[sizeof(tmp) - 1] = '\0';
                    if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
                        XFREE(rawKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                        return WOLFSSL_FAILURE;
                    }
                    XSNPRINTF(tmp, sizeof(tmp) - 1,
                            ":\n    ");
                    XSNPRINTF(val, valSz - 1, "%02x", rawKey[idx]);
                }
                else {
                    XSNPRINTF(val, valSz - 1, ":%02x", rawKey[idx]);
                }
                XSTRNCAT(tmp, val, valSz);
            }
            XFREE(rawKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);

            /* print out remaining values */
            if ((idx > 0) && (((idx - 1 + lbit) % 15) != 0)) {
                tmp[sizeof(tmp) - 1] = '\0';
                if (wolfSSL_BIO_write(bio, tmp, (int)XSTRLEN(tmp)) <= 0) {
                    return WOLFSSL_FAILURE;
                }
            }
            lbit = 0;
        }

    }
    /* done with print out */
    if (wolfSSL_BIO_write(bio, "\n\0", (int)XSTRLEN("\n\0")) <= 0) {
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

#endif /* XSNPRINTF */
#endif /* !NO_BIO */

#if !defined(NO_FILESYSTEM)
#ifndef NO_WOLFSSL_STUB
WOLFSSL_RSA *wolfSSL_PEM_read_RSAPublicKey(XFILE fp, WOLFSSL_RSA **x,
                                           pem_password_cb *cb, void *u)
{
    (void)fp;
    (void)x;
    (void)cb;
    (void)u;
    WOLFSSL_STUB("PEM_read_RSAPublicKey");
    WOLFSSL_MSG("wolfSSL_PEM_read_RSAPublicKey not implemented");

    return NULL;
}
#endif
/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
#ifndef NO_WOLFSSL_STUB
int wolfSSL_PEM_write_RSAPublicKey(XFILE fp, WOLFSSL_RSA *x)
{
    (void)fp;
    (void)x;
    WOLFSSL_STUB("PEM_write_RSAPublicKey");
    WOLFSSL_MSG("wolfSSL_PEM_write_RSAPublicKey not implemented");

    return WOLFSSL_FAILURE;
}
#endif

/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
#ifndef NO_WOLFSSL_STUB
int wolfSSL_PEM_write_RSA_PUBKEY(XFILE fp, WOLFSSL_RSA *x)
{
    (void)fp;
    (void)x;
    WOLFSSL_STUB("PEM_write_RSA_PUBKEY");
    WOLFSSL_MSG("wolfSSL_PEM_write_RSA_PUBKEY not implemented");

    return WOLFSSL_FAILURE;
}
#endif

#endif /* NO_FILESYSTEM */

WOLFSSL_RSA *wolfSSL_d2i_RSAPublicKey(WOLFSSL_RSA **r, const unsigned char **pp,
    long len)
{
    WOLFSSL_RSA *rsa = NULL;

    WOLFSSL_ENTER("d2i_RSAPublicKey");

    if (pp == NULL) {
        WOLFSSL_MSG("Bad argument");
        return NULL;
    }
    if ((rsa = wolfSSL_RSA_new()) == NULL) {
        WOLFSSL_MSG("RSA_new failed");
        return NULL;
    }

    if (wolfSSL_RSA_LoadDer_ex(rsa, *pp, (int)len, WOLFSSL_RSA_LOAD_PUBLIC)
                                                         != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("RSA_LoadDer failed");
        wolfSSL_RSA_free(rsa);
        rsa = NULL;
    }
    if (r != NULL)
        *r = rsa;

    return rsa;
}

/* Converts an RSA private key from DER format to an RSA structure.
Returns pointer to the RSA structure on success and NULL if error. */
WOLFSSL_RSA *wolfSSL_d2i_RSAPrivateKey(WOLFSSL_RSA **r,
                                       const unsigned char **derBuf, long derSz)
{
    WOLFSSL_RSA *rsa = NULL;

    WOLFSSL_ENTER("wolfSSL_d2i_RSAPrivateKey");

    /* check for bad functions arguments */
    if (derBuf == NULL) {
        WOLFSSL_MSG("Bad argument");
        return NULL;
    }
    if ((rsa = wolfSSL_RSA_new()) == NULL) {
        WOLFSSL_MSG("RSA_new failed");
        return NULL;
    }

    if (wolfSSL_RSA_LoadDer_ex(rsa, *derBuf, (int)derSz,
                                 WOLFSSL_RSA_LOAD_PRIVATE) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("RSA_LoadDer failed");
        wolfSSL_RSA_free(rsa);
        rsa = NULL;
    }
    if (r != NULL)
        *r = rsa;

    return rsa;
}

#if !defined(HAVE_FAST_RSA) && defined(WOLFSSL_KEY_GEN) && \
    !defined(NO_RSA) && !defined(HAVE_USER_RSA)
/* Converts an internal RSA structure to DER format.
 * If "pp" is null then buffer size only is returned.
 * If "*pp" is null then a created buffer is set in *pp and the caller is
 *  responsible for free'ing it.
 * Returns size of DER on success and WOLFSSL_FAILURE if error
 */
int wolfSSL_i2d_RSAPrivateKey(WOLFSSL_RSA *rsa, unsigned char **pp)
{
    int ret;

    WOLFSSL_ENTER("wolfSSL_i2d_RSAPrivateKey");

    /* check for bad functions arguments */
    if (rsa == NULL) {
        WOLFSSL_MSG("Bad Function Arguments");
        return BAD_FUNC_ARG;
    }

    if ((ret = wolfSSL_RSA_To_Der(rsa, pp, 0)) < 0) {
        WOLFSSL_MSG("wolfSSL_RSA_To_Der failed");
        return WOLFSSL_FAILURE;
    }

    return ret; /* returns size of DER if successful */
}


int wolfSSL_i2d_RSAPublicKey(WOLFSSL_RSA *rsa, const unsigned char **pp)
{
    int ret;

    /* check for bad functions arguments */
    if (rsa == NULL) {
        WOLFSSL_MSG("Bad Function Arguments");
        return BAD_FUNC_ARG;
    }

    if ((ret = wolfSSL_RSA_To_Der(rsa, (byte**)pp, 1)) < 0) {
        WOLFSSL_MSG("wolfSSL_RSA_To_Der failed");
        return WOLFSSL_FAILURE;
    }

    return ret;
}
#endif /* !defined(HAVE_FAST_RSA) && defined(WOLFSSL_KEY_GEN) && \
        * !defined(NO_RSA) && !defined(HAVE_USER_RSA) */

#endif /* !NO_RSA */
#endif /* OPENSSL_EXTRA */

#if !defined(NO_RSA) && (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL))
/* return WOLFSSL_SUCCESS if success, WOLFSSL_FATAL_ERROR if error */
int wolfSSL_RSA_LoadDer(WOLFSSL_RSA* rsa, const unsigned char* derBuf, int derSz)
{
  return wolfSSL_RSA_LoadDer_ex(rsa, derBuf, derSz, WOLFSSL_RSA_LOAD_PRIVATE);
}


int wolfSSL_RSA_LoadDer_ex(WOLFSSL_RSA* rsa, const unsigned char* derBuf,
                                                     int derSz, int opt)
{

    word32 idx = 0;
    int    ret;

    WOLFSSL_ENTER("wolfSSL_RSA_LoadDer");

    if (rsa == NULL || rsa->internal == NULL || derBuf == NULL || derSz <= 0) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FATAL_ERROR;
    }

    if (opt == WOLFSSL_RSA_LOAD_PRIVATE) {
        ret = wc_RsaPrivateKeyDecode(derBuf, &idx, (RsaKey*)rsa->internal, derSz);
    }
    else {
        ret = wc_RsaPublicKeyDecode(derBuf, &idx, (RsaKey*)rsa->internal, derSz);
    }

    if (ret < 0) {
        if (opt == WOLFSSL_RSA_LOAD_PRIVATE) {
             WOLFSSL_MSG("RsaPrivateKeyDecode failed");
        }
        else {
             WOLFSSL_MSG("RsaPublicKeyDecode failed");
        }
        return SSL_FATAL_ERROR;
    }

    if (SetRsaExternal(rsa) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetRsaExternal failed");
        return WOLFSSL_FATAL_ERROR;
    }

    rsa->inSet = 1;

    return WOLFSSL_SUCCESS;
}

#if defined(WC_RSA_PSS) && (defined(OPENSSL_ALL) || defined(WOLFSSL_ASIO) || \
        defined(WOLFSSL_HAPROXY) || defined(WOLFSSL_NGINX))
#if !defined(HAVE_FIPS) || (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION>2))
/*
 *                                +-----------+
 *                                |     M     |
 *                                +-----------+
 *                                      |
 *                                      V
 *                                    Hash
 *                                      |
 *                                      V
 *                        +--------+----------+----------+
 *                   M' = |Padding1|  mHash   |   salt   |
 *                        +--------+----------+----------+
 *                                       |
 *             +--------+----------+     V
 *       DB =  |Padding2|maskedseed|   Hash
 *             +--------+----------+     |
 *                       |               |
 *                       V               |    +--+
 *                      xor <--- MGF <---|    |bc|
 *                       |               |    +--+
 *                       |               |      |
 *                       V               V      V
 *             +-------------------+----------+--+
 *       EM =  |    maskedDB       |maskedseed|bc|
 *             +-------------------+----------+--+
 * Diagram taken from https://tools.ietf.org/html/rfc3447#section-9.1
 */
int wolfSSL_RSA_padding_add_PKCS1_PSS(WOLFSSL_RSA *rsa, unsigned char *EM,
                                      const unsigned char *mHash,
                                      const WOLFSSL_EVP_MD *hashAlg, int saltLen)
{
    int hashLen, emLen, mgf;
    int ret = WOLFSSL_FAILURE;
    int initTmpRng = 0;
    WC_RNG *rng = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG* tmpRNG = NULL;
#else
    WC_RNG  _tmpRNG[1];
    WC_RNG* tmpRNG = _tmpRNG;
#endif
    enum wc_HashType hashType;

    WOLFSSL_ENTER("wolfSSL_RSA_padding_add_PKCS1_PSS");

    if (!rsa || !EM || !mHash || !hashAlg) {
        return WOLFSSL_FAILURE;
    }

    if (!(rng = WOLFSSL_RSA_GetRNG(rsa, (WC_RNG**)&tmpRNG, &initTmpRng))) {
        WOLFSSL_MSG("WOLFSSL_RSA_GetRNG error");
        goto cleanup;
    }

    if (!rsa->exSet && SetRsaExternal(rsa) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetRsaExternal error");
        goto cleanup;
    }

    hashType = wolfSSL_EVP_md2macType(hashAlg);
    if (hashType < WC_HASH_TYPE_NONE || hashType > WC_HASH_TYPE_MAX) {
        WOLFSSL_MSG("wolfSSL_EVP_md2macType error");
        goto cleanup;
    }

   if ((mgf = wc_hash2mgf(hashType)) == WC_MGF1NONE) {
       WOLFSSL_MSG("wc_hash2mgf error");
       goto cleanup;
   }

    if ((hashLen = wolfSSL_EVP_MD_size(hashAlg)) < 0) {
        WOLFSSL_MSG("wolfSSL_EVP_MD_size error");
        goto cleanup;
    }

    if ((emLen = wolfSSL_RSA_size(rsa)) <= 0) {
        WOLFSSL_MSG("wolfSSL_RSA_size error");
        goto cleanup;
    }

    switch (saltLen) {
    /* Negative saltLen values are treated differently */
        case RSA_PSS_SALTLEN_DIGEST:
            saltLen = hashLen;
            break;
        case RSA_PSS_SALTLEN_MAX_SIGN:
        case RSA_PSS_SALTLEN_MAX:
            saltLen = emLen - hashLen - 2;
            break;
        default:
            if (saltLen < 0) {
                /* Not any currently implemented negative value */
                WOLFSSL_MSG("invalid saltLen");
                goto cleanup;
            }
    }

    if (wc_RsaPad_ex(mHash, hashLen, EM, emLen,
                     RSA_BLOCK_TYPE_1, rng, WC_RSA_PSS_PAD,
                     hashType, mgf, NULL, 0, saltLen,
                     wolfSSL_BN_num_bits(rsa->n), NULL) != MP_OKAY) {
        WOLFSSL_MSG("wc_RsaPad_ex error");
        goto cleanup;
    }

    ret = WOLFSSL_SUCCESS;
cleanup:
    if (initTmpRng)
        wc_FreeRng(tmpRNG);
#ifdef WOLFSSL_SMALL_STACK
    if (tmpRNG)
        XFREE(tmpRNG, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif

    return ret;
}

/*
 * Refer to wolfSSL_RSA_padding_add_PKCS1_PSS
 * for an explanation of the parameters.
 */
int wolfSSL_RSA_verify_PKCS1_PSS(WOLFSSL_RSA *rsa, const unsigned char *mHash,
                                 const WOLFSSL_EVP_MD *hashAlg,
                                 const unsigned char *EM, int saltLen)
{
    int hashLen, mgf, emLen, mPrimeLen;
    enum wc_HashType hashType;
    byte *mPrime = NULL;
    byte *buf = NULL;

    WOLFSSL_ENTER("wolfSSL_RSA_verify_PKCS1_PSS");

    if (!rsa || !mHash || !hashAlg || !EM) {
        return WOLFSSL_FAILURE;
    }

    if ((hashLen = wolfSSL_EVP_MD_size(hashAlg)) < 0) {
        return WOLFSSL_FAILURE;
    }

    if ((emLen = wolfSSL_RSA_size(rsa)) <= 0) {
        WOLFSSL_MSG("wolfSSL_RSA_size error");
        return WOLFSSL_FAILURE;
    }

    switch (saltLen) {
    /* Negative saltLen values are treated differently */
        case RSA_PSS_SALTLEN_DIGEST:
            saltLen = hashLen;
            break;
        case RSA_PSS_SALTLEN_MAX_SIGN:
        case RSA_PSS_SALTLEN_MAX:
            saltLen = emLen - hashLen - 2;
            break;
        default:
            if (saltLen < 0) {
                /* Not any currently implemented negative value */
                WOLFSSL_MSG("invalid saltLen");
                return WOLFSSL_FAILURE;
            }
    }

    if (!rsa->exSet && SetRsaExternal(rsa) != WOLFSSL_SUCCESS) {
        return WOLFSSL_FAILURE;
    }

    hashType = wolfSSL_EVP_md2macType(hashAlg);
    if (hashType < WC_HASH_TYPE_NONE || hashType > WC_HASH_TYPE_MAX) {
        WOLFSSL_MSG("wolfSSL_EVP_md2macType error");
        return WOLFSSL_FAILURE;
    }

    if ((mgf = wc_hash2mgf(hashType)) == WC_MGF1NONE) {
        WOLFSSL_MSG("wc_hash2mgf error");
        return WOLFSSL_FAILURE;
    }

    if ((hashLen = wolfSSL_EVP_MD_size(hashAlg)) < 0) {
        WOLFSSL_MSG("wolfSSL_EVP_MD_size error");
        return WOLFSSL_FAILURE;
    }

    if (!(buf = (byte*)XMALLOC(emLen, NULL, DYNAMIC_TYPE_TMP_BUFFER))) {
        WOLFSSL_MSG("malloc error");
        return WOLFSSL_FAILURE;
    }
    XMEMCPY(buf, EM, emLen);

    /* Remove and verify the PSS padding */
    if ((mPrimeLen = wc_RsaUnPad_ex(buf, emLen, &mPrime,
                                    RSA_BLOCK_TYPE_1, WC_RSA_PSS_PAD, hashType,
                                    mgf, NULL, 0, saltLen,
                                    wolfSSL_BN_num_bits(rsa->n), NULL)) < 0) {
        WOLFSSL_MSG("wc_RsaPad_ex error");
        XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        return WOLFSSL_FAILURE;
    }

    /* Verify the hash is correct */
    if (wc_RsaPSS_CheckPadding_ex(mHash, hashLen, mPrime, mPrimeLen, hashType,
                                  saltLen, wolfSSL_BN_num_bits(rsa->n))
                                  != MP_OKAY) {
        WOLFSSL_MSG("wc_RsaPSS_CheckPadding_ex error");
        XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        return WOLFSSL_FAILURE;
    }
    XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    return WOLFSSL_SUCCESS;
}
#endif /* !HAVE_FIPS || HAVE_FIPS_VERSION > 2 */
#endif /* WC_RSA_PSS && (OPENSSL_ALL || WOLFSSL_ASIO || WOLFSSL_HAPROXY
        *                || WOLFSSL_NGINX)
        */

#if defined(OPENSSL_EXTRA)
WOLFSSL_RSA_METHOD *wolfSSL_RSA_meth_new(const char *name, int flags)
{
    int name_len;
    WOLFSSL_RSA_METHOD* meth;

    if (name == NULL) {
        return NULL;
    }

    meth = (WOLFSSL_RSA_METHOD*)XMALLOC(sizeof(WOLFSSL_RSA_METHOD), NULL,
        DYNAMIC_TYPE_OPENSSL);
    name_len = (int)XSTRLEN(name);
    if (!meth) {
        return NULL;
    }
    meth->flags = flags;
    meth->name = (char*)XMALLOC(name_len+1, NULL, DYNAMIC_TYPE_OPENSSL);
    if (!meth->name) {
        XFREE(meth, NULL, DYNAMIC_TYPE_OPENSSL);
        return NULL;
    }
    XMEMCPY(meth->name, name, name_len+1);

    return meth;
}

void wolfSSL_RSA_meth_free(WOLFSSL_RSA_METHOD *meth)
{
    if (meth) {
        XFREE(meth->name, NULL, DYNAMIC_TYPE_OPENSSL);
        XFREE(meth, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}

#ifndef NO_WOLFSSL_STUB
int wolfSSL_RSA_meth_set(WOLFSSL_RSA_METHOD *rsa, void* p)
{
    (void)rsa;
    (void)p;
    WOLFSSL_STUB("RSA_METHOD is not implemented.");
    return 1;
}
#endif

int wolfSSL_RSA_set_method(WOLFSSL_RSA *rsa, WOLFSSL_RSA_METHOD *meth)
{
    if (rsa)
        rsa->meth = meth;
    return 1;
}

const WOLFSSL_RSA_METHOD* wolfSSL_RSA_get_method(const WOLFSSL_RSA *rsa)
{
    if (!rsa) {
        return NULL;
    }
    return rsa->meth;
}

const WOLFSSL_RSA_METHOD* wolfSSL_RSA_get_default_method(void)
{
    return wolfSSL_RSA_meth_new("wolfSSL RSA", 0);
}

int wolfSSL_RSA_flags(const WOLFSSL_RSA *r)
{
    if (r && r->meth) {
        return r->meth->flags;
    } else {
        return 0;
    }
}

void wolfSSL_RSA_set_flags(WOLFSSL_RSA *r, int flags)
{
    if (r && r->meth) {
        r->meth->flags = flags;
    }
}

#if defined(WOLFSSL_KEY_GEN) && !defined(NO_RSA) && !defined(HAVE_USER_RSA)
WOLFSSL_RSA* wolfSSL_RSAPublicKey_dup(WOLFSSL_RSA *rsa)
{
    int derSz = 0;
    byte *derBuf = NULL;
    WOLFSSL_RSA* local;

    WOLFSSL_ENTER("wolfSSL_RSAPublicKey_dup");

    if (!rsa) {
        return NULL;
    }

    local = wolfSSL_RSA_new();
    if (local == NULL) {
        WOLFSSL_MSG("Error creating a new WOLFSSL_RSA structure");
        return NULL;
    }

    if ((derSz = wolfSSL_RSA_To_Der(rsa, &derBuf, 1)) < 0) {
        WOLFSSL_MSG("wolfSSL_RSA_To_Der failed");
        return NULL;
    }

    if (wolfSSL_RSA_LoadDer_ex(local,
                derBuf, derSz,
                WOLFSSL_RSA_LOAD_PUBLIC) != WOLFSSL_SUCCESS) {
        wolfSSL_RSA_free(local);
        local = NULL;
    }
    XFREE(derBuf, NULL, DYNAMIC_TYPE_ASN1);
    return local;
}
#endif

void* wolfSSL_RSA_get_ex_data(const WOLFSSL_RSA *rsa, int idx)
{
    WOLFSSL_ENTER("wolfSSL_RSA_get_ex_data");
#ifdef HAVE_EX_DATA
    if (rsa) {
        return wolfSSL_CRYPTO_get_ex_data(&rsa->ex_data, idx);
    }
#else
    (void)rsa;
    (void)idx;
#endif
    return NULL;
}

int wolfSSL_RSA_set_ex_data(WOLFSSL_RSA *rsa, int idx, void *data)
{
    WOLFSSL_ENTER("wolfSSL_RSA_set_ex_data");
    #ifdef HAVE_EX_DATA
    if (rsa) {
        return wolfSSL_CRYPTO_set_ex_data(&rsa->ex_data, idx, data);
    }
    #else
    (void)rsa;
    (void)idx;
    (void)data;
    #endif
    return WOLFSSL_FAILURE;
}

#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
int wolfSSL_RSA_set_ex_data_with_cleanup(
    WOLFSSL_RSA *rsa,
    int idx,
    void *data,
    wolfSSL_ex_data_cleanup_routine_t cleanup_routine)
{
    WOLFSSL_ENTER("wolfSSL_RSA_set_ex_data_with_cleanup");
    if (rsa) {
        return wolfSSL_CRYPTO_set_ex_data_with_cleanup(&rsa->ex_data, idx, data,
                                                       cleanup_routine);
    }
    return WOLFSSL_FAILURE;
}
#endif /* HAVE_EX_DATA_CLEANUP_HOOKS */

int wolfSSL_RSA_set0_key(WOLFSSL_RSA *r, WOLFSSL_BIGNUM *n, WOLFSSL_BIGNUM *e,
                         WOLFSSL_BIGNUM *d)
{
    /* If the fields n and e in r are NULL, the corresponding input
     * parameters MUST be non-NULL for n and e.  d may be
     * left NULL (in case only the public key is used).
     */
    if ((!r->n && !n) || (!r->e && !e))
        return 0;

    if (n) {
        wolfSSL_BN_free(r->n);
        r->n = n;
    }
    if (e) {
        wolfSSL_BN_free(r->e);
        r->e = e;
    }
    if (d) {
        wolfSSL_BN_clear_free(r->d);
        r->d = d;
    }

    return 1;
}
#endif /* OPENSSL_EXTRA */
#endif /* NO_RSA */

#if !defined(NO_DSA) && \
    (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL))
/* return WOLFSSL_SUCCESS if success, WOLFSSL_FATAL_ERROR if error */
int wolfSSL_DSA_LoadDer(WOLFSSL_DSA* dsa, const unsigned char* derBuf, int derSz)
{
    word32 idx = 0;
    int    ret;

    WOLFSSL_ENTER("wolfSSL_DSA_LoadDer");

    if (dsa == NULL || dsa->internal == NULL || derBuf == NULL || derSz <= 0) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FATAL_ERROR;
    }

    ret = DsaPrivateKeyDecode(derBuf, &idx, (DsaKey*)dsa->internal, derSz);
    if (ret < 0) {
        WOLFSSL_MSG("DsaPrivateKeyDecode failed");
        return WOLFSSL_FATAL_ERROR;
    }

    if (SetDsaExternal(dsa) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetDsaExternal failed");
        return WOLFSSL_FATAL_ERROR;
    }

    dsa->inSet = 1;

    return WOLFSSL_SUCCESS;
}

/* Loads DSA key from DER buffer. opt = DSA_LOAD_PRIVATE or DSA_LOAD_PUBLIC.
    returns 1 on success, or 0 on failure.  */
int wolfSSL_DSA_LoadDer_ex(WOLFSSL_DSA* dsa, const unsigned char* derBuf,
                                                            int derSz, int opt)
{
    word32 idx = 0;
    int    ret;

    WOLFSSL_ENTER("wolfSSL_DSA_LoadDer");

    if (dsa == NULL || dsa->internal == NULL || derBuf == NULL || derSz <= 0) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FATAL_ERROR;
    }

    if (opt == WOLFSSL_DSA_LOAD_PRIVATE) {
        ret = DsaPrivateKeyDecode(derBuf, &idx, (DsaKey*)dsa->internal, derSz);
    }
    else {
        ret = DsaPublicKeyDecode(derBuf, &idx, (DsaKey*)dsa->internal, derSz);
    }

    if (ret < 0 && opt == WOLFSSL_DSA_LOAD_PRIVATE) {
        WOLFSSL_MSG("DsaPrivateKeyDecode failed");
        return WOLFSSL_FATAL_ERROR;
    }
    else if (ret < 0 && opt == WOLFSSL_DSA_LOAD_PUBLIC) {
        WOLFSSL_MSG("DsaPublicKeyDecode failed");
        return WOLFSSL_FATAL_ERROR;
    }

    if (SetDsaExternal(dsa) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetDsaExternal failed");
        return WOLFSSL_FATAL_ERROR;
    }

    dsa->inSet = 1;

    return WOLFSSL_SUCCESS;
}
#endif /* !NO_DSA && (OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL) */

#ifdef OPENSSL_EXTRA
#ifdef HAVE_ECC
/* return WOLFSSL_SUCCESS if success, WOLFSSL_FATAL_ERROR if error */
int wolfSSL_EC_KEY_LoadDer(WOLFSSL_EC_KEY* key, const unsigned char* derBuf,
                           int derSz)
{
    return wolfSSL_EC_KEY_LoadDer_ex(key, derBuf, derSz,
                                     WOLFSSL_EC_KEY_LOAD_PRIVATE);
}

int wolfSSL_EC_KEY_LoadDer_ex(WOLFSSL_EC_KEY* key, const unsigned char* derBuf,
                              int derSz, int opt)
{
    word32 idx = 0;
    int    ret;

    WOLFSSL_ENTER("wolfSSL_EC_KEY_LoadDer");

    if (key == NULL || key->internal == NULL || derBuf == NULL || derSz <= 0) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FATAL_ERROR;
    }

    if (opt == WOLFSSL_EC_KEY_LOAD_PRIVATE) {
        ret = wc_EccPrivateKeyDecode(derBuf, &idx, (ecc_key*)key->internal,
                                     derSz);
    }
    else {
        ret = wc_EccPublicKeyDecode(derBuf, &idx, (ecc_key*)key->internal,
                                    derSz);
    }
    if (ret < 0) {
        if (opt == WOLFSSL_EC_KEY_LOAD_PRIVATE) {
            WOLFSSL_MSG("wc_EccPrivateKeyDecode failed");
        }
        else {
            WOLFSSL_MSG("wc_EccPublicKeyDecode failed");
        }
        return WOLFSSL_FATAL_ERROR;
    }

    if (SetECKeyExternal(key) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetECKeyExternal failed");
        return WOLFSSL_FATAL_ERROR;
    }

    key->inSet = 1;

    return WOLFSSL_SUCCESS;
}
#endif /* HAVE_ECC */

#if !defined(NO_DH) && (defined(WOLFSSL_QT) || defined(OPENSSL_ALL) || defined(WOLFSSL_OPENSSH))
/* return WOLFSSL_SUCCESS if success, WOLFSSL_FATAL_ERROR if error */
#if !defined(HAVE_FIPS) || (defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION>2))
int wolfSSL_DH_LoadDer(WOLFSSL_DH* dh, const unsigned char* derBuf, int derSz)
{
    word32 idx = 0;
    int    ret;

    if (dh == NULL || dh->internal == NULL || derBuf == NULL || derSz <= 0) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FATAL_ERROR;
    }

    ret = wc_DhKeyDecode(derBuf, &idx, (DhKey*)dh->internal, (word32)derSz);
    if (ret < 0) {
        WOLFSSL_MSG("wc_DhKeyDecode failed");
        return WOLFSSL_FATAL_ERROR;
    }
    dh->inSet = 1;

    if (SetDhExternal(dh) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("SetDhExternal failed");
        return WOLFSSL_FATAL_ERROR;
    }

    return WOLFSSL_SUCCESS;
}
#endif /* !HAVE_FIPS || HAVE_FIPS_VERSION > 2 */
#endif /* ! NO_DH && WOLFSSL_QT || OPENSSL_ALL */

#endif /* OPENSSL_EXTRA */


#if defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)

/* increments ref count of WOLFSSL_RSA. Return 1 on success, 0 on error */
int wolfSSL_RSA_up_ref(WOLFSSL_RSA* rsa)
{
    if (rsa) {
        if (wc_LockMutex(&rsa->refMutex) != 0) {
            WOLFSSL_MSG("Failed to lock x509 mutex");
        }
        rsa->refCount++;
        wc_UnLockMutex(&rsa->refMutex);

        return WOLFSSL_SUCCESS;
    }

    return WOLFSSL_FAILURE;
}

/* increments ref count of WOLFSSL_X509. Return 1 on success, 0 on error */
int wolfSSL_X509_up_ref(WOLFSSL_X509* x509)
{
    if (x509) {
        if (wc_LockMutex(&x509->refMutex) != 0) {
            WOLFSSL_MSG("Failed to lock x509 mutex");
        }
        x509->refCount++;
        wc_UnLockMutex(&x509->refMutex);

        return WOLFSSL_SUCCESS;
    }

    return WOLFSSL_FAILURE;
}

#endif /* OPENSSL_EXTRA || OPENSSL_ALL */


#ifdef WOLFSSL_ALT_CERT_CHAINS
int wolfSSL_is_peer_alt_cert_chain(const WOLFSSL* ssl)
{
    int isUsing = 0;
    if (ssl)
        isUsing = ssl->options.usingAltCertChain;
    return isUsing;
}
#endif /* WOLFSSL_ALT_CERT_CHAINS */


#ifdef SESSION_CERTS

#ifdef WOLFSSL_ALT_CERT_CHAINS
/* Get peer's alternate certificate chain */
WOLFSSL_X509_CHAIN* wolfSSL_get_peer_alt_chain(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_get_peer_alt_chain");
    if (ssl)
        return &ssl->session.altChain;

    return 0;
}
#endif /* WOLFSSL_ALT_CERT_CHAINS */


/* Get peer's certificate chain */
WOLFSSL_X509_CHAIN* wolfSSL_get_peer_chain(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_get_peer_chain");
    if (ssl)
        return &ssl->session.chain;

    return 0;
}


/* Get peer's certificate chain total count */
int wolfSSL_get_chain_count(WOLFSSL_X509_CHAIN* chain)
{
    WOLFSSL_ENTER("wolfSSL_get_chain_count");
    if (chain)
        return chain->count;

    return 0;
}


/* Get peer's ASN.1 DER certificate at index (idx) length in bytes */
int wolfSSL_get_chain_length(WOLFSSL_X509_CHAIN* chain, int idx)
{
    WOLFSSL_ENTER("wolfSSL_get_chain_length");
    if (chain)
        return chain->certs[idx].length;

    return 0;
}


/* Get peer's ASN.1 DER certificate at index (idx) */
byte* wolfSSL_get_chain_cert(WOLFSSL_X509_CHAIN* chain, int idx)
{
    WOLFSSL_ENTER("wolfSSL_get_chain_cert");
    if (chain)
        return chain->certs[idx].buffer;

    return 0;
}


/* Get peer's wolfSSL X509 certificate at index (idx) */
WOLFSSL_X509* wolfSSL_get_chain_X509(WOLFSSL_X509_CHAIN* chain, int idx)
{
    int          ret;
    WOLFSSL_X509* x509 = NULL;
#ifdef WOLFSSL_SMALL_STACK
    DecodedCert* cert = NULL;
#else
    DecodedCert  cert[1];
#endif

    WOLFSSL_ENTER("wolfSSL_get_chain_X509");
    if (chain != NULL) {
    #ifdef WOLFSSL_SMALL_STACK
        cert = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL,
                                                       DYNAMIC_TYPE_DCERT);
        if (cert != NULL)
    #endif
        {
            InitDecodedCert(cert, chain->certs[idx].buffer,
                                  chain->certs[idx].length, NULL);

            if ((ret = ParseCertRelative(cert, CERT_TYPE, 0, NULL)) != 0) {
                WOLFSSL_MSG("Failed to parse cert");
            }
            else {
                x509 = (WOLFSSL_X509*)XMALLOC(sizeof(WOLFSSL_X509), NULL,
                                                             DYNAMIC_TYPE_X509);
                if (x509 == NULL) {
                    WOLFSSL_MSG("Failed alloc X509");
                }
                else {
                    InitX509(x509, 1, NULL);

                    if ((ret = CopyDecodedToX509(x509, cert)) != 0) {
                        WOLFSSL_MSG("Failed to copy decoded");
                        wolfSSL_X509_free(x509);
                        x509 = NULL;
                    }
                }
            }

            FreeDecodedCert(cert);
        #ifdef WOLFSSL_SMALL_STACK
            XFREE(cert, NULL, DYNAMIC_TYPE_DCERT);
        #endif
        }
    }
    (void)ret;

    return x509;
}


/* Get peer's PEM certificate at index (idx), output to buffer if inLen big
   enough else return error (-1). If buffer is NULL only calculate
   outLen. Output length is in *outLen WOLFSSL_SUCCESS on ok */
int  wolfSSL_get_chain_cert_pem(WOLFSSL_X509_CHAIN* chain, int idx,
                               unsigned char* buf, int inLen, int* outLen)
{
#if defined(WOLFSSL_PEM_TO_DER) || defined(WOLFSSL_DER_TO_PEM)
    const char* header = NULL;
    const char* footer = NULL;
    int headerLen;
    int footerLen;
    int i;
    int err;
    word32 szNeeded = 0;

    WOLFSSL_ENTER("wolfSSL_get_chain_cert_pem");
    if (!chain || !outLen || idx < 0 || idx >= wolfSSL_get_chain_count(chain))
        return BAD_FUNC_ARG;

    err = wc_PemGetHeaderFooter(CERT_TYPE, &header, &footer);
    if (err != 0)
        return err;

    headerLen = (int)XSTRLEN(header);
    footerLen = (int)XSTRLEN(footer);

    /* Null output buffer return size needed in outLen */
    if(!buf) {
        if(Base64_Encode(chain->certs[idx].buffer, chain->certs[idx].length,
                    NULL, &szNeeded) != LENGTH_ONLY_E)
            return WOLFSSL_FAILURE;
        *outLen = szNeeded + headerLen + footerLen;
        return LENGTH_ONLY_E;
    }

    /* don't even try if inLen too short */
    if (inLen < headerLen + footerLen + chain->certs[idx].length)
        return BAD_FUNC_ARG;

    /* header */
    if (XMEMCPY(buf, header, headerLen) == NULL)
        return WOLFSSL_FATAL_ERROR;

    i = headerLen;

    /* body */
    *outLen = inLen;  /* input to Base64_Encode */
    if ( (err = Base64_Encode(chain->certs[idx].buffer,
                       chain->certs[idx].length, buf + i, (word32*)outLen)) < 0)
        return err;
    i += *outLen;

    /* footer */
    if ( (i + footerLen) > inLen)
        return BAD_FUNC_ARG;
    if (XMEMCPY(buf + i, footer, footerLen) == NULL)
        return WOLFSSL_FATAL_ERROR;
    *outLen += headerLen + footerLen;

    return WOLFSSL_SUCCESS;
#else
    (void)chain;
    (void)idx;
    (void)buf;
    (void)inLen;
    (void)outLen;
    return WOLFSSL_FAILURE;
#endif /* WOLFSSL_PEM_TO_DER || WOLFSSL_DER_TO_PEM */
}


/* get session ID */
WOLFSSL_ABI
const byte* wolfSSL_get_sessionID(const WOLFSSL_SESSION* session)
{
    WOLFSSL_ENTER("wolfSSL_get_sessionID");
    if (session)
        return session->sessionID;

    return NULL;
}


#endif /* SESSION_CERTS */

#ifdef HAVE_FUZZER
void wolfSSL_SetFuzzerCb(WOLFSSL* ssl, CallbackFuzzer cbf, void* fCtx)
{
    if (ssl) {
        ssl->fuzzerCb  = cbf;
        ssl->fuzzerCtx = fCtx;
    }
}
#endif

#ifndef NO_CERTS
#ifdef  HAVE_PK_CALLBACKS

#ifdef HAVE_ECC
void  wolfSSL_CTX_SetEccKeyGenCb(WOLFSSL_CTX* ctx, CallbackEccKeyGen cb)
{
    if (ctx)
        ctx->EccKeyGenCb = cb;
}
void  wolfSSL_SetEccKeyGenCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->EccKeyGenCtx = ctx;
}
void* wolfSSL_GetEccKeyGenCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->EccKeyGenCtx;

    return NULL;
}

WOLFSSL_ABI
void  wolfSSL_CTX_SetEccSignCb(WOLFSSL_CTX* ctx, CallbackEccSign cb)
{
    if (ctx)
        ctx->EccSignCb = cb;
}
void  wolfSSL_SetEccSignCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->EccSignCtx = ctx;
}
void* wolfSSL_GetEccSignCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->EccSignCtx;

    return NULL;
}

void  wolfSSL_CTX_SetEccVerifyCb(WOLFSSL_CTX* ctx, CallbackEccVerify cb)
{
    if (ctx)
        ctx->EccVerifyCb = cb;
}
void  wolfSSL_SetEccVerifyCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->EccVerifyCtx = ctx;
}
void* wolfSSL_GetEccVerifyCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->EccVerifyCtx;

    return NULL;
}

void wolfSSL_CTX_SetEccSharedSecretCb(WOLFSSL_CTX* ctx, CallbackEccSharedSecret cb)
{
    if (ctx)
        ctx->EccSharedSecretCb = cb;
}
void  wolfSSL_SetEccSharedSecretCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->EccSharedSecretCtx = ctx;
}
void* wolfSSL_GetEccSharedSecretCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->EccSharedSecretCtx;

    return NULL;
}
#endif /* HAVE_ECC */

#ifdef HAVE_ED25519
void  wolfSSL_CTX_SetEd25519SignCb(WOLFSSL_CTX* ctx, CallbackEd25519Sign cb)
{
    if (ctx)
        ctx->Ed25519SignCb = cb;
}
void  wolfSSL_SetEd25519SignCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->Ed25519SignCtx = ctx;
}
void* wolfSSL_GetEd25519SignCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->Ed25519SignCtx;

    return NULL;
}

void  wolfSSL_CTX_SetEd25519VerifyCb(WOLFSSL_CTX* ctx, CallbackEd25519Verify cb)
{
    if (ctx)
        ctx->Ed25519VerifyCb = cb;
}
void  wolfSSL_SetEd25519VerifyCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->Ed25519VerifyCtx = ctx;
}
void* wolfSSL_GetEd25519VerifyCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->Ed25519VerifyCtx;

    return NULL;
}
#endif /* HAVE_ED25519 */

#ifdef HAVE_CURVE25519
void wolfSSL_CTX_SetX25519KeyGenCb(WOLFSSL_CTX* ctx,
        CallbackX25519KeyGen cb)
{
    if (ctx)
        ctx->X25519KeyGenCb = cb;
}
void  wolfSSL_SetX25519KeyGenCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->X25519KeyGenCtx = ctx;
}
void* wolfSSL_GetX25519KeyGenCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->X25519KeyGenCtx;

    return NULL;
}

void wolfSSL_CTX_SetX25519SharedSecretCb(WOLFSSL_CTX* ctx,
        CallbackX25519SharedSecret cb)
{
    if (ctx)
        ctx->X25519SharedSecretCb = cb;
}
void  wolfSSL_SetX25519SharedSecretCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->X25519SharedSecretCtx = ctx;
}
void* wolfSSL_GetX25519SharedSecretCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->X25519SharedSecretCtx;

    return NULL;
}
#endif /* HAVE_CURVE25519 */

#ifdef HAVE_ED448
void  wolfSSL_CTX_SetEd448SignCb(WOLFSSL_CTX* ctx, CallbackEd448Sign cb)
{
    if (ctx)
        ctx->Ed448SignCb = cb;
}
void  wolfSSL_SetEd448SignCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->Ed448SignCtx = ctx;
}
void* wolfSSL_GetEd448SignCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->Ed448SignCtx;

    return NULL;
}

void  wolfSSL_CTX_SetEd448VerifyCb(WOLFSSL_CTX* ctx, CallbackEd448Verify cb)
{
    if (ctx)
        ctx->Ed448VerifyCb = cb;
}
void  wolfSSL_SetEd448VerifyCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->Ed448VerifyCtx = ctx;
}
void* wolfSSL_GetEd448VerifyCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->Ed448VerifyCtx;

    return NULL;
}
#endif /* HAVE_ED448 */

#ifdef HAVE_CURVE448
void wolfSSL_CTX_SetX448KeyGenCb(WOLFSSL_CTX* ctx,
        CallbackX448KeyGen cb)
{
    if (ctx)
        ctx->X448KeyGenCb = cb;
}
void  wolfSSL_SetX448KeyGenCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->X448KeyGenCtx = ctx;
}
void* wolfSSL_GetX448KeyGenCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->X448KeyGenCtx;

    return NULL;
}

void wolfSSL_CTX_SetX448SharedSecretCb(WOLFSSL_CTX* ctx,
        CallbackX448SharedSecret cb)
{
    if (ctx)
        ctx->X448SharedSecretCb = cb;
}
void  wolfSSL_SetX448SharedSecretCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->X448SharedSecretCtx = ctx;
}
void* wolfSSL_GetX448SharedSecretCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->X448SharedSecretCtx;

    return NULL;
}
#endif /* HAVE_CURVE448 */

#ifndef NO_RSA
void  wolfSSL_CTX_SetRsaSignCb(WOLFSSL_CTX* ctx, CallbackRsaSign cb)
{
    if (ctx)
        ctx->RsaSignCb = cb;
}
void  wolfSSL_CTX_SetRsaSignCheckCb(WOLFSSL_CTX* ctx, CallbackRsaVerify cb)
{
    if (ctx)
        ctx->RsaSignCheckCb = cb;
}
void  wolfSSL_SetRsaSignCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->RsaSignCtx = ctx;
}
void* wolfSSL_GetRsaSignCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->RsaSignCtx;

    return NULL;
}


void  wolfSSL_CTX_SetRsaVerifyCb(WOLFSSL_CTX* ctx, CallbackRsaVerify cb)
{
    if (ctx)
        ctx->RsaVerifyCb = cb;
}
void  wolfSSL_SetRsaVerifyCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->RsaVerifyCtx = ctx;
}
void* wolfSSL_GetRsaVerifyCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->RsaVerifyCtx;

    return NULL;
}

#ifdef WC_RSA_PSS
void  wolfSSL_CTX_SetRsaPssSignCb(WOLFSSL_CTX* ctx, CallbackRsaPssSign cb)
{
    if (ctx)
        ctx->RsaPssSignCb = cb;
}
void  wolfSSL_CTX_SetRsaPssSignCheckCb(WOLFSSL_CTX* ctx, CallbackRsaPssVerify cb)
{
    if (ctx)
        ctx->RsaPssSignCheckCb = cb;
}
void  wolfSSL_SetRsaPssSignCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->RsaPssSignCtx = ctx;
}
void* wolfSSL_GetRsaPssSignCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->RsaPssSignCtx;

    return NULL;
}

void  wolfSSL_CTX_SetRsaPssVerifyCb(WOLFSSL_CTX* ctx, CallbackRsaPssVerify cb)
{
    if (ctx)
        ctx->RsaPssVerifyCb = cb;
}
void  wolfSSL_SetRsaPssVerifyCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->RsaPssVerifyCtx = ctx;
}
void* wolfSSL_GetRsaPssVerifyCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->RsaPssVerifyCtx;

    return NULL;
}
#endif /* WC_RSA_PSS */

void  wolfSSL_CTX_SetRsaEncCb(WOLFSSL_CTX* ctx, CallbackRsaEnc cb)
{
    if (ctx)
        ctx->RsaEncCb = cb;
}
void  wolfSSL_SetRsaEncCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->RsaEncCtx = ctx;
}
void* wolfSSL_GetRsaEncCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->RsaEncCtx;

    return NULL;
}

void  wolfSSL_CTX_SetRsaDecCb(WOLFSSL_CTX* ctx, CallbackRsaDec cb)
{
    if (ctx)
        ctx->RsaDecCb = cb;
}
void  wolfSSL_SetRsaDecCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->RsaDecCtx = ctx;
}
void* wolfSSL_GetRsaDecCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->RsaDecCtx;

    return NULL;
}
#endif /* NO_RSA */

#endif /* HAVE_PK_CALLBACKS */
#endif /* NO_CERTS */

#if defined(HAVE_PK_CALLBACKS) && !defined(NO_DH)
void wolfSSL_CTX_SetDhAgreeCb(WOLFSSL_CTX* ctx, CallbackDhAgree cb)
{
    if (ctx)
        ctx->DhAgreeCb = cb;
}
void wolfSSL_SetDhAgreeCtx(WOLFSSL* ssl, void *ctx)
{
    if (ssl)
        ssl->DhAgreeCtx = ctx;
}
void* wolfSSL_GetDhAgreeCtx(WOLFSSL* ssl)
{
    if (ssl)
        return ssl->DhAgreeCtx;

    return NULL;
}
#endif /* HAVE_PK_CALLBACKS && !NO_DH */


#ifdef WOLFSSL_HAVE_WOLFSCEP
    /* Used by autoconf to see if wolfSCEP is available */
    void wolfSSL_wolfSCEP(void) {}
#endif


#ifdef WOLFSSL_HAVE_CERT_SERVICE
    /* Used by autoconf to see if cert service is available */
    void wolfSSL_cert_service(void) {}
#endif

#if (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)) && \
    !defined(WOLFCRYPT_ONLY)
#ifndef NO_CERTS
    void wolfSSL_X509_NAME_free(WOLFSSL_X509_NAME *name)
    {
        WOLFSSL_ENTER("wolfSSL_X509_NAME_free");
        FreeX509Name(name);
        XFREE(name, NULL, DYNAMIC_TYPE_X509);
    }


    /* Malloc's a new WOLFSSL_X509_NAME structure
     *
     * returns NULL on failure, otherwise returns a new structure.
     */
    WOLFSSL_X509_NAME* wolfSSL_X509_NAME_new(void)
    {
        WOLFSSL_X509_NAME* name;

        WOLFSSL_ENTER("wolfSSL_X509_NAME_new");

        name = (WOLFSSL_X509_NAME*)XMALLOC(sizeof(WOLFSSL_X509_NAME), NULL,
                DYNAMIC_TYPE_X509);
        if (name != NULL) {
            InitX509Name(name, 1, NULL);
        }
        return name;
    }

    /* Creates a duplicate of a WOLFSSL_X509_NAME structure.
       Returns a new WOLFSSL_X509_NAME structure or NULL on failure */
    WOLFSSL_X509_NAME* wolfSSL_X509_NAME_dup(WOLFSSL_X509_NAME *name)
    {
        WOLFSSL_X509_NAME* copy = NULL;

        WOLFSSL_ENTER("wolfSSL_X509_NAME_dup");

        if (name == NULL) {
            WOLFSSL_MSG("NULL parameter");
            return NULL;
        }

        if (!(copy = wolfSSL_X509_NAME_new())) {
            return NULL;
        }

        /* copy contents */
        InitX509Name(copy, 1, name->heap);
        if (wolfSSL_X509_NAME_copy(name, copy) != WOLFSSL_SUCCESS) {
            wolfSSL_X509_NAME_free(copy);
            return NULL;
        }

        return copy;
    }

#ifdef WOLFSSL_CERT_GEN

#if defined(WOLFSSL_CERT_REQ) || defined(WOLFSSL_CERT_EXT) || defined(OPENSSL_EXTRA)
    /* Helper function to copy cert name from a WOLFSSL_X509_NAME structure to
    * a Cert structure.
    *
    * returns length of DER on success and a negative error value on failure
    */
    static int CopyX509NameToCert(WOLFSSL_X509_NAME* n, byte* out)
    {
        unsigned char* der = NULL;
        int length = BAD_FUNC_ARG, ret;
        word32 idx = 0;

        ret = wolfSSL_i2d_X509_NAME(n, &der);
        if (ret > (int)sizeof(CertName) || ret < 0) {
            WOLFSSL_MSG("Name conversion error");
            ret = MEMORY_E;
        }

        if (ret > 0) {
            /* strip off sequence, this gets added on certificate creation */
            ret = GetSequence(der, &idx, &length, ret);
        }

        if (ret > 0) {
            XMEMCPY(out, der + idx, length);
        }

        if (der != NULL)
            XFREE(der, NULL, DYNAMIC_TYPE_OPENSSL);

        return length;
    }
#endif

#ifdef WOLFSSL_CERT_REQ
    static int ReqCertFromX509(Cert* cert, WOLFSSL_X509* req)
    {
        int ret;

        if (wc_InitCert(cert) != 0)
            return WOLFSSL_FAILURE;


        ret = CopyX509NameToCert(&req->subject, cert->sbjRaw);
        if (ret < 0) {
            WOLFSSL_MSG("REQ subject conversion error");
            ret = MEMORY_E;
        }
        else {
            ret = WOLFSSL_SUCCESS;
        }

        if (ret == WOLFSSL_SUCCESS) {
            cert->version = req->version;
            cert->isCA = req->isCa;
    #ifdef WOLFSSL_CERT_EXT
            if (req->subjKeyIdSz != 0) {
                XMEMCPY(cert->skid, req->subjKeyId, req->subjKeyIdSz);
                cert->skidSz = req->subjKeyIdSz;
            }
            if (req->keyUsageSet)
                cert->keyUsage = req->keyUsage;
            /* Extended Key Usage not supported. */
    #endif
    #ifdef WOLFSSL_CERT_REQ
            XMEMCPY(cert->challengePw, req->challengePw, CTC_NAME_SIZE);
            cert->challengePwPrintableString = req->challengePw[0] != 0;
    #endif
    #ifdef WOLFSSL_ALT_NAMES
            cert->altNamesSz = FlattenAltNames(cert->altNames,
                    sizeof(cert->altNames), req->altNames);
    #endif /* WOLFSSL_ALT_NAMES */
        }

        return ret;
    }
#endif /* WOLFSSL_CERT_REQ */

#ifdef WOLFSSL_ALT_NAMES
    /* converts WOLFSSL_AN1_TIME to Cert form, returns positive size on
     * success */
    static int CertDateFromX509(byte* out, int outSz, WOLFSSL_ASN1_TIME* t)
    {
        int sz, i;

        if (t->length + 1 >= outSz) {
            return BUFFER_E;
        }

        out[0] = t->type;
        sz = SetLength(t->length, out + 1) + 1;  /* gen tag */
        for (i = 0; i < t->length; i++) {
            out[sz + i] = t->data[i];
        }
        return t->length + sz;
    }
#endif /* WOLFSSL_ALT_NAMES */

    /* convert a WOLFSSL_X509 to a Cert structure for writing out */
    static int CertFromX509(Cert* cert, WOLFSSL_X509* x509)
    {
        int ret;
        #ifdef WOLFSSL_CERT_EXT
        int i;
        #endif

        WOLFSSL_ENTER("wolfSSL_X509_to_Cert()");

        if (x509 == NULL || cert == NULL) {
            return BAD_FUNC_ARG;
        }

        wc_InitCert(cert);

        cert->version = (int)wolfSSL_X509_get_version(x509);

    #ifdef WOLFSSL_ALT_NAMES
        if (x509->notBefore.length > 0) {
            cert->beforeDateSz = CertDateFromX509(cert->beforeDate,
                        CTC_DATE_SIZE, &x509->notBefore);
            if (cert->beforeDateSz <= 0){
                WOLFSSL_MSG("Not before date error");
                return WOLFSSL_FAILURE;
            }
        }
        else {
            cert->beforeDateSz = 0;
        }

        if (x509->notAfter.length > 0) {
            cert->afterDateSz = CertDateFromX509(cert->afterDate,
                        CTC_DATE_SIZE, &x509->notAfter);
            if (cert->afterDateSz <= 0){
                WOLFSSL_MSG("Not after date error");
                return WOLFSSL_FAILURE;
            }
        }
        else {
            cert->afterDateSz = 0;
        }

        cert->altNamesSz = FlattenAltNames(cert->altNames,
                sizeof(cert->altNames), x509->altNames);
    #endif /* WOLFSSL_ALT_NAMES */

        cert->sigType = wolfSSL_X509_get_signature_type(x509);
        cert->keyType = x509->pubKeyOID;
        cert->isCA    = wolfSSL_X509_get_isCA(x509);

    #ifdef WOLFSSL_CERT_EXT
        if (x509->subjKeyIdSz < CTC_MAX_SKID_SIZE) {
            if (x509->subjKeyId) {
                XMEMCPY(cert->skid, x509->subjKeyId, x509->subjKeyIdSz);
            }
            cert->skidSz = (int)x509->subjKeyIdSz;
        }
        else {
            WOLFSSL_MSG("Subject Key ID too large");
            return WOLFSSL_FAILURE;
        }

        if (x509->authKeyIdSz < CTC_MAX_AKID_SIZE) {
            if (x509->authKeyId) {
                XMEMCPY(cert->akid, x509->authKeyId, x509->authKeyIdSz);
            }
            cert->akidSz = (int)x509->authKeyIdSz;
        }
        else {
            WOLFSSL_MSG("Auth Key ID too large");
            return WOLFSSL_FAILURE;
        }

        for (i = 0; i < x509->certPoliciesNb; i++) {
            /* copy the smaller of MAX macros, by default they are currently equal*/
            if ((int)CTC_MAX_CERTPOL_SZ <= (int)MAX_CERTPOL_SZ) {
                XMEMCPY(cert->certPolicies[i], x509->certPolicies[i],
                        CTC_MAX_CERTPOL_SZ);
            }
            else {
                XMEMCPY(cert->certPolicies[i], x509->certPolicies[i],
                        MAX_CERTPOL_SZ);
            }
        }
        cert->certPoliciesNb = (word16)x509->certPoliciesNb;

        cert->keyUsage = x509->keyUsage;
    #endif /* WOLFSSL_CERT_EXT */

    #ifdef WOLFSSL_CERT_REQ
        /* copy over challenge password for REQ certs */
        XMEMCPY(cert->challengePw, x509->challengePw, CTC_NAME_SIZE);
    #endif

        /* set serial number */
        if (x509->serialSz > 0) {
        #if defined(OPENSSL_EXTRA)
            byte serial[EXTERNAL_SERIAL_SIZE];
            int  serialSz = EXTERNAL_SERIAL_SIZE;

            ret = wolfSSL_X509_get_serial_number(x509, serial, &serialSz);
            if (ret != WOLFSSL_SUCCESS) {
                WOLFSSL_MSG("Serial size error");
                return WOLFSSL_FAILURE;
            }

            if (serialSz > EXTERNAL_SERIAL_SIZE ||
                    serialSz > CTC_SERIAL_SIZE) {
                WOLFSSL_MSG("Serial size too large error");
                return WOLFSSL_FAILURE;
            }
            XMEMCPY(cert->serial, serial, serialSz);
            cert->serialSz = serialSz;
        #else
            WOLFSSL_MSG("Getting X509 serial number not supported");
            return WOLFSSL_FAILURE;
        #endif
        }

        /* copy over Name structures */
        if (x509->issuerSet)
            cert->selfSigned = 0;

    #if defined(WOLFSSL_CERT_EXT) || defined(OPENSSL_EXTRA)
        ret = CopyX509NameToCert(&x509->subject, cert->sbjRaw);
        if (ret < 0) {
            WOLFSSL_MSG("Subject conversion error");
            return MEMORY_E;
        }
        if (cert->selfSigned) {
            XMEMCPY(cert->issRaw, cert->sbjRaw, sizeof(CertName));
        }
        else {
            ret = CopyX509NameToCert(&x509->issuer, cert->issRaw);
            if (ret < 0) {
                WOLFSSL_MSG("Issuer conversion error");
                return MEMORY_E;
            }
        }
    #endif

        cert->heap = x509->heap;

        (void)ret;
        return WOLFSSL_SUCCESS;
    }


    /* returns the sig type to use on success i.e CTC_SHAwRSA and WOLFSSL_FALURE
     * on fail case */
    static int wolfSSL_sigTypeFromPKEY(WOLFSSL_EVP_MD* md,
            WOLFSSL_EVP_PKEY* pkey)
    {
        int hashType;
        int sigType = WOLFSSL_FAILURE;

    #if !defined(NO_PWDBASED) && defined(OPENSSL_EXTRA)
        /* Convert key type and hash algorithm to a signature algorithm */
        if (wolfSSL_EVP_get_hashinfo(md, &hashType, NULL) == WOLFSSL_FAILURE) {
            return WOLFSSL_FAILURE;
        }
    #else
        (void)md;
        WOLFSSL_MSG("Cannot get hashinfo when NO_PWDBASED is defined");
        return WOLFSSL_FAILURE;
    #endif /* !defined(NO_PWDBASED) */


        if (pkey->type == EVP_PKEY_RSA) {
            switch (hashType) {
                case WC_HASH_TYPE_SHA:
                    sigType = CTC_SHAwRSA;
                    break;
                case WC_HASH_TYPE_SHA224:
                    sigType = CTC_SHA224wRSA;
                    break;
                case WC_HASH_TYPE_SHA256:
                    sigType = CTC_SHA256wRSA;
                    break;
                case WC_HASH_TYPE_SHA384:
                    sigType = CTC_SHA384wRSA;
                    break;
                case WC_HASH_TYPE_SHA512:
                    sigType = CTC_SHA512wRSA;
                    break;
            #ifdef WOLFSSL_SHA3
                case WC_HASH_TYPE_SHA3_224:
                    sigType = CTC_SHA3_224wRSA;
                    break;
                case WC_HASH_TYPE_SHA3_256:
                    sigType = CTC_SHA3_256wRSA;
                    break;
                case WC_HASH_TYPE_SHA3_384:
                    sigType = CTC_SHA3_384wRSA;
                    break;
                case WC_HASH_TYPE_SHA3_512:
                    sigType = CTC_SHA3_512wRSA;
                    break;
            #endif
                default:
                    return WOLFSSL_FAILURE;
            }
        }
        else if (pkey->type == EVP_PKEY_EC) {
            switch (hashType) {
                case WC_HASH_TYPE_SHA:
                    sigType = CTC_SHAwECDSA;
                    break;
                case WC_HASH_TYPE_SHA224:
                    sigType = CTC_SHA224wECDSA;
                    break;
                case WC_HASH_TYPE_SHA256:
                    sigType = CTC_SHA256wECDSA;
                    break;
                case WC_HASH_TYPE_SHA384:
                    sigType = CTC_SHA384wECDSA;
                    break;
                case WC_HASH_TYPE_SHA512:
                    sigType = CTC_SHA512wECDSA;
                    break;
            #ifdef WOLFSSL_SHA3
                case WC_HASH_TYPE_SHA3_224:
                    sigType = CTC_SHA3_224wECDSA;
                    break;
                case WC_HASH_TYPE_SHA3_256:
                    sigType = CTC_SHA3_256wECDSA;
                    break;
                case WC_HASH_TYPE_SHA3_384:
                    sigType = CTC_SHA3_384wECDSA;
                    break;
                case WC_HASH_TYPE_SHA3_512:
                    sigType = CTC_SHA3_512wECDSA;
                    break;
            #endif
                default:
                    return WOLFSSL_FAILURE;
            }
        }
        else
            return WOLFSSL_FAILURE;
        return sigType;
    }


    /* generates DER buffer from WOLFSSL_X509
     * If req == 1 then creates a request DER buffer
     *
     * updates derSz with certificate body size on success
     * return WOLFSSL_SUCCESS on success
     */
    static int wolfssl_x509_make_der(WOLFSSL_X509* x509, int req,
            unsigned char* der, int* derSz, int includeSig)
    {
        int ret = WOLFSSL_FAILURE;
        int totalLen;
        Cert cert;
        void* key = NULL;
        int type = -1;
    #ifndef NO_RSA
        RsaKey rsa;
    #endif
    #ifdef HAVE_ECC
        ecc_key ecc;
    #endif
    #ifndef NO_DSA
        DsaKey dsa;
    #endif
        WC_RNG rng;
        word32 idx = 0;

        if (x509 == NULL || der == NULL || derSz == NULL)
            return BAD_FUNC_ARG;

    #ifndef WOLFSSL_CERT_REQ
        if (req) {
            WOLFSSL_MSG("WOLFSSL_CERT_REQ needed for certificate request");
            return WOLFSSL_FAILURE;
        }
    #endif

    #ifdef WOLFSSL_CERT_REQ
        if (req) {
            if (ReqCertFromX509(&cert, x509) != WOLFSSL_SUCCESS)
                return WOLFSSL_FAILURE;
        }
        else
    #endif
        {
            /* Create a Cert that has the certificate fields. */
            if (CertFromX509(&cert, x509) != WOLFSSL_SUCCESS)
                return WOLFSSL_FAILURE;
        }

        /* Create a public key object from requests public key. */
    #ifndef NO_RSA
        if (x509->pubKeyOID == RSAk) {
            type = RSA_TYPE;
            ret = wc_InitRsaKey(&rsa, x509->heap);
            if (ret != 0)
                return ret;
            ret = wc_RsaPublicKeyDecode(x509->pubKey.buffer, &idx, &rsa,
                                                           x509->pubKey.length);
            if (ret != 0) {
                wc_FreeRsaKey(&rsa);
                return ret;
            }
            key = (void*)&rsa;
        }
    #endif
    #ifdef HAVE_ECC
        if (x509->pubKeyOID == ECDSAk) {
            type = ECC_TYPE;
            ret = wc_ecc_init(&ecc);
            if (ret != 0)
                return ret;
            ret = wc_EccPublicKeyDecode(x509->pubKey.buffer, &idx, &ecc,
                                                           x509->pubKey.length);
            if (ret != 0) {
                wc_ecc_free(&ecc);
                return ret;
            }
            key = (void*)&ecc;
        }
    #endif
    #ifndef NO_DSA
        if (x509->pubKeyOID == DSAk) {
            type = DSA_TYPE;
            ret = wc_InitDsaKey(&dsa);
            if (ret != 0)
                return ret;
            ret = wc_DsaPublicKeyDecode(x509->pubKey.buffer, &idx, &dsa,
                                                           x509->pubKey.length);
            if (ret != 0) {
                wc_FreeDsaKey(&dsa);
                return ret;
            }
            key = (void*)&dsa;
        }
    #endif
        if (key == NULL) {
            WOLFSSL_MSG("No public key found for certificate");
            return WOLFSSL_FAILURE;
        }

        /* Make the body of the certificate request. */
    #ifdef WOLFSSL_CERT_REQ
        if (req) {
            ret = wc_MakeCertReq_ex(&cert, der, *derSz, type, key);
        }
        else
    #endif
        {
            ret = wc_InitRng(&rng);
            if (ret != 0)
                return WOLFSSL_FAILURE;

            ret = wc_MakeCert_ex(&cert, der, *derSz, type, key, &rng);
            wc_FreeRng(&rng);
        }
        if (ret <= 0) {
            ret = WOLFSSL_FAILURE;
            goto cleanup;
        }

        if ((x509->serialSz == 0) &&
                (cert.serialSz <= EXTERNAL_SERIAL_SIZE) &&
                (cert.serialSz > 0)) {
        #if defined(OPENSSL_EXTRA)
            WOLFSSL_ASN1_INTEGER *i = wolfSSL_ASN1_INTEGER_new();

            if (i == NULL) {
                WOLFSSL_MSG("wolfSSL_ASN1_INTEGER_new error");
                ret = WOLFSSL_FAILURE;
                goto cleanup;
            }
            else {
                i->length = cert.serialSz + 2;
                i->data[0] = ASN_INTEGER;
                i->data[1] = cert.serialSz;
                XMEMCPY(i->data + 2, cert.serial, cert.serialSz);
                if (wolfSSL_X509_set_serialNumber(x509, i) != WOLFSSL_SUCCESS) {
                    WOLFSSL_MSG("Issue setting generated serial number");
                    wolfSSL_ASN1_INTEGER_free(i);
                    ret = WOLFSSL_FAILURE;
                    goto cleanup;
                }
                wolfSSL_ASN1_INTEGER_free(i);
            }
        #else
            WOLFSSL_MSG("ASN1_INTEGER API not in build");

            ret = WOLFSSL_FAILURE;
            goto cleanup;
        #endif /* OPENSSL_EXTRA */
        }

        if (includeSig) {
            if (!x509->sig.buffer) {
                WOLFSSL_MSG("No signature buffer");
                ret = WOLFSSL_FAILURE;
                goto cleanup;
            }
            totalLen = AddSignature(NULL, ret, NULL, x509->sig.length,
                                  x509->sigOID);
            if (totalLen > *derSz) {
                WOLFSSL_MSG("Output der buffer too short");
                ret = WOLFSSL_FAILURE;
                goto cleanup;
            }
            ret = AddSignature(der, ret, x509->sig.buffer,
                               x509->sig.length, x509->sigOID);
        }

        *derSz = ret;
        ret = WOLFSSL_SUCCESS;
cleanup:
        /* Dispose of the public key object. */
    #ifndef NO_RSA
        if (x509->pubKeyOID == RSAk)
            wc_FreeRsaKey(&rsa);
    #endif
    #ifdef HAVE_ECC
        if (x509->pubKeyOID == ECDSAk)
            wc_ecc_free(&ecc);
    #endif

        return ret;
    }


    /* signs a der buffer for the WOLFSSL_X509 structure using the PKEY and MD
     * hash passed in
     *
     * WARNING: this free's and replaces the existing DER buffer in the
     *          WOLFSSL_X509 with the newly signed buffer.
     * returns size of signed buffer on success and negative values on fail
     */
    static int wolfSSL_X509_resign_cert(WOLFSSL_X509* x509, int req,
            unsigned char* der, int derSz, int certBodySz, WOLFSSL_EVP_MD* md,
            WOLFSSL_EVP_PKEY* pkey)
    {
        int ret;
        void* key = NULL;
        int type = -1;
        int sigType;
        WC_RNG rng;

        (void)req;

        sigType = wolfSSL_sigTypeFromPKEY(md, pkey);
        if (sigType == WOLFSSL_FAILURE)
            return WOLFSSL_FATAL_ERROR;


        /* Get the private key object and type from pkey. */
    #ifndef NO_RSA
        if (pkey->type == EVP_PKEY_RSA) {
            type = RSA_TYPE;
            key = pkey->rsa->internal;
        }
    #endif
    #ifdef HAVE_ECC
        if (pkey->type == EVP_PKEY_EC) {
            type = ECC_TYPE;
            key = pkey->ecc->internal;
        }
    #endif

        /* Sign the certificate (request) body. */
        ret = wc_InitRng(&rng);
        if (ret != 0)
            return ret;
        ret = wc_SignCert_ex(certBodySz, sigType, der, derSz, type, key, &rng);
        wc_FreeRng(&rng);
        if (ret < 0)
            return ret;
        derSz = ret;

        /* Extract signature from buffer */
        {
            word32 idx = 0;
            int    len = 0;

            /* Read top level sequence */
            if (GetSequence(der, &idx, &len, derSz) < 0) {
                WOLFSSL_MSG("GetSequence error");
                return WOLFSSL_FATAL_ERROR;
            }
            /* Move idx to signature */
            idx += certBodySz;
            /* Read signature algo sequence */
            if (GetSequence(der, &idx, &len, derSz) < 0) {
                WOLFSSL_MSG("GetSequence error");
                return WOLFSSL_FATAL_ERROR;
            }
            idx += len;
            /* Read signature bit string */
            if (CheckBitString(der, &idx, &len, derSz, 0, NULL) != 0) {
                WOLFSSL_MSG("CheckBitString error");
                return WOLFSSL_FATAL_ERROR;
            }
            /* Sanity check */
            if (idx + len != (word32)derSz) {
                WOLFSSL_MSG("unexpected asn1 structure");
                return WOLFSSL_FATAL_ERROR;
            }
            x509->sig.length = 0;
            if (x509->sig.buffer)
                XFREE(x509->sig.buffer, x509->heap, DYNAMIC_TYPE_SIGNATURE);
            x509->sig.buffer = (byte*)XMALLOC(len, x509->heap,
                                              DYNAMIC_TYPE_SIGNATURE);
            if (!x509->sig.buffer) {
                WOLFSSL_MSG("malloc error");
                return WOLFSSL_FATAL_ERROR;
            }
            XMEMCPY(x509->sig.buffer, der + idx, len);
            x509->sig.length = len;
        }

        /* Put in the new certificate encoding into the x509 object. */
        FreeDer(&x509->derCert);
        type = CERT_TYPE;
    #ifdef WOLFSSL_CERT_REQ
        if (req) {
            type = CERTREQ_TYPE;
        }
    #endif
        if (AllocDer(&x509->derCert, derSz, type, NULL) != 0)
            return WOLFSSL_FATAL_ERROR;
        XMEMCPY(x509->derCert->buffer, der, derSz);
        x509->derCert->length = derSz;

        return ret;
    }


    #ifndef WC_MAX_X509_GEN
        /* able to override max size until dynamic buffer created */
        #define WC_MAX_X509_GEN 4096
    #endif

    /* returns the size of signature on success */
    int wolfSSL_X509_sign(WOLFSSL_X509* x509, WOLFSSL_EVP_PKEY* pkey,
            const WOLFSSL_EVP_MD* md)
    {
        int  ret;
        /* @TODO dynamic set based on expected cert size */
        byte *der = (byte *)XMALLOC(WC_MAX_X509_GEN, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        int  derSz = WC_MAX_X509_GEN;

        WOLFSSL_ENTER("wolfSSL_X509_sign");

        if (x509 == NULL || pkey == NULL || md == NULL) {
            ret = WOLFSSL_FAILURE;
            goto out;
        }

        x509->sigOID = wolfSSL_sigTypeFromPKEY((WOLFSSL_EVP_MD*)md, pkey);
        if ((ret = wolfssl_x509_make_der(x509, 0, der, &derSz, 0)) !=
                WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Unable to make DER for X509");
            WOLFSSL_LEAVE("wolfSSL_X509_sign", ret);
            (void)ret;
            ret = WOLFSSL_FAILURE;
            goto out;
        }

        ret = wolfSSL_X509_resign_cert(x509, 0, der, WC_MAX_X509_GEN, derSz,
                (WOLFSSL_EVP_MD*)md, pkey);
        if (ret <= 0) {
            WOLFSSL_LEAVE("wolfSSL_X509_sign", ret);
            ret = WOLFSSL_FAILURE;
            goto out;
        }

    out:
	if (der)
            XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER);

        return ret;
    }

#if defined(OPENSSL_EXTRA)
    int wolfSSL_X509_sign_ctx(WOLFSSL_X509 *x509, WOLFSSL_EVP_MD_CTX *ctx)
    {
        WOLFSSL_ENTER("wolfSSL_X509_sign_ctx");

        if (!x509 || !ctx || !ctx->pctx || !ctx->pctx->pkey) {
            WOLFSSL_MSG("Bad parameter");
            return WOLFSSL_FAILURE;
        }

        return wolfSSL_X509_sign(x509, ctx->pctx->pkey, wolfSSL_EVP_MD_CTX_md(ctx));
    }
#endif /* OPENSSL_EXTRA */

/* Guarded by either
 * A) WOLFSSL_WPAS_SMALL is on or
 * B) (OPENSSL_EXTRA or OPENSSL_EXTRA_X509_SMALL) + WOLFSSL_CERT_GEN +
 *    (WOLFSSL_CERT_REQ or WOLFSSL_CERT_EXT or OPENSSL_EXTRA) has been
 *    defined
 */
#if defined(WOLFSSL_WPAS_SMALL) || \
    (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)) && \
    defined(WOLFSSL_CERT_GEN) && \
    (defined(WOLFSSL_CERT_REQ) || defined(WOLFSSL_CERT_EXT) || \
     defined(OPENSSL_EXTRA))
/* Converts from NID_* value to wolfSSL value if needed */
static int ConvertNIDToWolfSSL(int nid)
{
    switch (nid) {
        case NID_commonName : return ASN_COMMON_NAME;
        case NID_surname :    return ASN_SUR_NAME;
        case NID_countryName: return ASN_COUNTRY_NAME;
        case NID_localityName: return ASN_LOCALITY_NAME;
        case NID_stateOrProvinceName: return ASN_STATE_NAME;
        case NID_organizationName: return ASN_ORG_NAME;
        case NID_organizationalUnitName: return ASN_ORGUNIT_NAME;
        case NID_emailAddress: return ASN_EMAIL_NAME;
        case NID_serialNumber: return ASN_SERIAL_NUMBER;
        case NID_businessCategory: return ASN_BUS_CAT;
        case NID_domainComponent: return ASN_DOMAIN_COMPONENT;
        default:
            WOLFSSL_MSG("Attribute NID not found");
            return -1;
    }
}

#if defined(OPENSSL_ALL)
/* Convert ASN1 input string into canonical ASN1 string                     */
/*  , which has the following rules:                                        */
/*   convert to UTF8                                                        */
/*   convert to lower case                                                  */
/*   multi-spaces collapsed                                                 */
/* @param  asn_out a pointer to ASN1_STRING to be converted                 */
/* @param  asn_in  a pointer to input ASN1_STRING                           */
/* @return WOLFSSL_SUCCESS on successful converted, otherwise <=0 error code*/
static int wolfSSL_ASN1_STRING_canon(WOLFSSL_ASN1_STRING* asn_out,
                                        const WOLFSSL_ASN1_STRING* asn_in)
{
    char* dst;
    char* src;
    int i, len;

    WOLFSSL_ENTER("wolfSSL_ASN1_STRING_canon");
    
    /* sanity check */
    if (asn_out == NULL || asn_in == NULL) {
        WOLFSSL_MSG("invalid function arguments");
        return BAD_FUNC_ARG;
    }
    
    switch (asn_in->type) {
        case MBSTRING_UTF8:
        case V_ASN1_PRINTABLESTRING:
             break;
        default:
           WOLFSSL_MSG("just copy string");
           return wolfSSL_ASN1_STRING_copy(asn_out, asn_in);
    }
    /* type is set as UTF8 */
    asn_out->type = MBSTRING_UTF8;
    asn_out->length = wolfSSL_ASN1_STRING_to_UTF8(
                                            (unsigned char**)&asn_out->data
                                            , (WOLFSSL_ASN1_STRING*)asn_in);

    if (asn_out->length < 0) {
        return WOLFSSL_FAILURE;
    }
    /* point to the last */
    dst = asn_out->data + asn_out->length;
    /* point to the start */
    src = asn_out->data;

    len = asn_out->length;

    /* trimming spaces at the head and tail */
    dst--;
    for (; (len > 0 && XISSPACE(*dst)); len--) {
        dst--;
    }
    for (; (len > 0 && XISSPACE(*src)); len--) {
        src++;
    }

    /* point to the start */
    dst = asn_out->data;

    for (i = 0; i < len; dst++, i++) {
        if (!XISASCII(*src)) {
            /* keep non-ascii code */
            *dst = *src++;
        } else if (XISSPACE(*src)) {
            *dst = 0x20; /* space */
            /* remove the rest of spaces */
            while (XISSPACE(*++src) && i++ < len);
        } else {
            *dst = XTOLOWER(*src++);
        }
    }
    /* put actual length */
    asn_out->length = (int)(dst - asn_out->data);
    return WOLFSSL_SUCCESS;
}

/* This is to convert the x509 name structure into canonical DER format     */
/*  , which has the following rules:                                        */
/*   convert to UTF8                                                        */
/*   convert to lower case                                                  */
/*   multi-spaces collapsed                                                 */
/*   leading SEQUENCE hader is skipped                                      */
/* @param  name a pointer to X509_NAME that is to be converted              */
/* @param  out  a pointer to conveted data                                  */
/* @return a number of converted bytes, otherwise <=0 error code            */
int wolfSSL_i2d_X509_NAME_canon(WOLFSSL_X509_NAME* name, unsigned char** out)
{
    int  totalBytes = 0, i, idx;
    byte *output, *local = NULL;
#ifdef WOLFSSL_SMALL_STACK
    EncodedName* names = NULL;
#else
    EncodedName  names[MAX_NAME_ENTRIES];
#endif

    if (out == NULL || name == NULL)
        return BAD_FUNC_ARG;

#ifdef WOLFSSL_SMALL_STACK
    names = (EncodedName*)XMALLOC(sizeof(EncodedName) * MAX_NAME_ENTRIES, NULL,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
    if (names == NULL)
        return MEMORY_E;
#endif

    XMEMSET(names, 0, sizeof(EncodedName) * MAX_NAME_ENTRIES);

    for (i = 0; i < MAX_NAME_ENTRIES; i++) {
        WOLFSSL_X509_NAME_ENTRY* entry;
        int ret;

        entry = wolfSSL_X509_NAME_get_entry(name, i);
        if (entry != NULL && entry->set == 1) {
            const char* nameStr;
            WOLFSSL_ASN1_STRING* data;
            WOLFSSL_ASN1_STRING* cano_data;

            cano_data = wolfSSL_ASN1_STRING_new();
            if (cano_data == NULL) {
                #ifdef WOLFSSL_SMALL_STACK
                XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                #endif
                return MEMORY_E;
            }

            data = wolfSSL_X509_NAME_ENTRY_get_data(entry);
            if (data == NULL) {
            #ifdef WOLFSSL_SMALL_STACK
                XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            #endif
                wolfSSL_ASN1_STRING_free(cano_data);
                WOLFSSL_MSG("Error getting entry data");
                return WOLFSSL_FATAL_ERROR;
            }
            if (wolfSSL_ASN1_STRING_canon(cano_data, data) != WOLFSSL_SUCCESS) {
                return WOLFSSL_FAILURE;
            }
            nameStr = (const char*)wolfSSL_ASN1_STRING_data(cano_data);

            ret = wc_EncodeNameCanonical(&names[i], nameStr, CTC_UTF8,
                ConvertNIDToWolfSSL(entry->nid));
            if (ret < 0) {
            #ifdef WOLFSSL_SMALL_STACK
                XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            #endif
                wolfSSL_ASN1_STRING_free(cano_data);
                WOLFSSL_MSG("EncodeName failed");
                return WOLFSSL_FATAL_ERROR;
            }
            totalBytes += ret;
            wolfSSL_OPENSSL_free(cano_data->data);
            wolfSSL_ASN1_STRING_free(cano_data);
        }
    }

    /* skip header */
    /* check if using buffer passed in */
    if (*out == NULL) {
        *out = local = (unsigned char*)XMALLOC(totalBytes, NULL,
                DYNAMIC_TYPE_OPENSSL);
        if (*out == NULL) {
            return MEMORY_E;
        }
    }
    output = *out;
    idx = 0;

    for (i = 0; i < MAX_NAME_ENTRIES; i++) {
        if (names[i].used) {
            XMEMCPY(output + idx, names[i].encoded, names[i].totalLen);
            idx += names[i].totalLen;
        }
    }

#ifdef WOLFSSL_SMALL_STACK
    XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif

    /* used existing buffer passed in, so increment pointer */
    if (local == NULL) {
        *out += totalBytes;
    }
    return totalBytes;
}
#endif

/* Converts the x509 name structure into DER format.
 *
 * out  pointer to either a pre setup buffer or a pointer to null for
 *      creating a dynamic buffer. In the case that a pre-existing buffer is
 *      used out will be incremented the size of the DER buffer on success.
 *
 * returns the size of the buffer on success, or negative value with failure
 */
int wolfSSL_i2d_X509_NAME(WOLFSSL_X509_NAME* name, unsigned char** out)
{
    int  totalBytes = 0, i, idx;
    byte temp[MAX_SEQ_SZ];
    byte *output, *local = NULL;
#ifdef WOLFSSL_SMALL_STACK
    EncodedName* names = NULL;
#else
    EncodedName  names[MAX_NAME_ENTRIES];
#endif

    if (out == NULL || name == NULL)
        return BAD_FUNC_ARG;

#ifdef WOLFSSL_SMALL_STACK
    names = (EncodedName*)XMALLOC(sizeof(EncodedName) * MAX_NAME_ENTRIES, NULL,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
    if (names == NULL)
        return MEMORY_E;
#endif

    XMEMSET(names, 0, sizeof(EncodedName) * MAX_NAME_ENTRIES);

    for (i = 0; i < MAX_NAME_ENTRIES; i++) {
        WOLFSSL_X509_NAME_ENTRY* entry;
        int ret;

        entry = wolfSSL_X509_NAME_get_entry(name, i);
        if (entry != NULL && entry->set == 1) {
            const char* nameStr;
            int type;
            WOLFSSL_ASN1_STRING* data;

            data = wolfSSL_X509_NAME_ENTRY_get_data(entry);
            if (data == NULL) {
            #ifdef WOLFSSL_SMALL_STACK
                XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            #endif
                WOLFSSL_MSG("Error getting entry data");
                return WOLFSSL_FATAL_ERROR;
            }

            nameStr = (const char*)wolfSSL_ASN1_STRING_data(data);
            type    = wolfSSL_ASN1_STRING_type(data);

            switch (type) {
                case MBSTRING_UTF8:
                    type = CTC_UTF8;
                    break;
                case V_ASN1_PRINTABLESTRING:
                    type = CTC_PRINTABLE;
                    break;
                default:
                    WOLFSSL_MSG("Unknown encoding type conversion UTF8 by default");
                    type = CTC_UTF8;
            }
            ret = wc_EncodeName(&names[i], nameStr, type,
                ConvertNIDToWolfSSL(entry->nid));
            if (ret < 0) {
            #ifdef WOLFSSL_SMALL_STACK
                XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            #endif
                WOLFSSL_MSG("EncodeName failed");
                return WOLFSSL_FATAL_ERROR;
            }
            totalBytes += ret;
        }
    }

    /* header */
    idx = SetSequence(totalBytes, temp);
    if (totalBytes + idx > ASN_NAME_MAX) {
#ifdef WOLFSSL_SMALL_STACK
        XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
        WOLFSSL_MSG("Total Bytes is greater than ASN_NAME_MAX");
        return BUFFER_E;
    }

    /* check if using buffer passed in */
    if (*out == NULL) {
        *out = local = (unsigned char*)XMALLOC(totalBytes + idx, NULL,
                DYNAMIC_TYPE_OPENSSL);
        if (*out == NULL) {
            return MEMORY_E;
        }
    }

    /* header */
    idx = SetSequence(totalBytes, temp);
    if (totalBytes + idx > ASN_NAME_MAX) {
#ifdef WOLFSSL_SMALL_STACK
        XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
        WOLFSSL_MSG("Total Bytes is greater than ASN_NAME_MAX");
        return BUFFER_E;
    }

    /* check if using buffer passed in */
    if (*out == NULL) {
        *out = local = (unsigned char*)XMALLOC(totalBytes + idx, NULL,
                DYNAMIC_TYPE_OPENSSL);
        if (*out == NULL) {
            return MEMORY_E;
        }
    }
    output = *out;

    idx = SetSequence(totalBytes, output);
    totalBytes += idx;
    for (i = 0; i < MAX_NAME_ENTRIES; i++) {
        if (names[i].used) {
            XMEMCPY(output + idx, names[i].encoded, names[i].totalLen);
            idx += names[i].totalLen;
        }
    }

#ifdef WOLFSSL_SMALL_STACK
    XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif

    /* used existing buffer passed in, so increment pointer */
    if (local == NULL) {
        *out += totalBytes;
    }
    return totalBytes;
}
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */
#endif /* WOLFSSL_CERT_GEN */

#if defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)

    WOLFSSL_X509_NAME *wolfSSL_d2i_X509_NAME(WOLFSSL_X509_NAME **name,
                                             unsigned char **in, long length)
    {
        WOLFSSL_X509_NAME* tmp = NULL;
        DecodedCert cert;

        WOLFSSL_ENTER("wolfSSL_d2i_X509_NAME");

        if (!in || !*in || length <= 0) {
            WOLFSSL_MSG("Bad argument");
            return NULL;
        }

        /* Set the X509_NAME buffer as the input data for cert.
         * in is NOT a full certificate. Just the name. */
        InitDecodedCert(&cert, *in, (word32)length, NULL);

        /* Parse the X509 subject name */
        if (GetName(&cert, SUBJECT, (int)length) != 0) {
            WOLFSSL_MSG("WOLFSSL_X509_NAME parse error");
            goto cleanup;
        }

        if (!(tmp = wolfSSL_X509_NAME_new())) {
            WOLFSSL_MSG("wolfSSL_X509_NAME_new error");
            goto cleanup;
        }

        if (wolfSSL_X509_NAME_copy((WOLFSSL_X509_NAME*)cert.subjectName,
                    tmp) != WOLFSSL_SUCCESS) {
            wolfSSL_X509_NAME_free(tmp);
            tmp = NULL;
            goto cleanup;
        }

        if (name)
            *name = tmp;
cleanup:
        FreeDecodedCert(&cert);
        return tmp;
    }


    /* Compares the two X509 names. If the size of x is larger then y then a
     * positive value is returned if x is smaller a negative value is returned.
     * In the case that the sizes are equal a the value of strcmp between the
     * two names is returned.
     *
     * x First name for comparison
     * y Second name to compare with x
     */
    int wolfSSL_X509_NAME_cmp(const WOLFSSL_X509_NAME* x,
            const WOLFSSL_X509_NAME* y)
    {
        const char* _x;
        const char* _y;
        WOLFSSL_ENTER("wolfSSL_X509_NAME_cmp");

        if (x == NULL || y == NULL) {
            WOLFSSL_MSG("Bad argument passed in");
            return -2;
        }

        if (x == y) {
            return 0; /* match */
        }

        if (x->sz != y->sz) {
            return x->sz - y->sz;
        }

        /*
         * If the name member is not set or is immediately null terminated then
         * compare the staticName member
         */
        _x = (x->name && *x->name) ? x->name : x->staticName;
        _y = (y->name && *y->name) ? y->name : y->staticName;

        return XSTRNCMP(_x, _y, x->sz); /* y sz is the same */
    }

#ifndef NO_BIO

    static WOLFSSL_X509 *loadX509orX509REQFromPemBio(WOLFSSL_BIO *bp,
            WOLFSSL_X509 **x, pem_password_cb *cb, void *u, int type)
    {
        WOLFSSL_X509* x509 = NULL;
#if defined(WOLFSSL_PEM_TO_DER) || defined(WOLFSSL_DER_TO_PEM)
        unsigned char* pem = NULL;
        int pemSz;
        long  i = 0, l, footerSz;
        const char* footer = NULL;

        WOLFSSL_ENTER("loadX509orX509REQFromPemBio");

        if (bp == NULL || (type != CERT_TYPE && type != CERTREQ_TYPE)) {
            WOLFSSL_LEAVE("wolfSSL_PEM_read_bio_X509", BAD_FUNC_ARG);
            return NULL;
        }

        if ((l = wolfSSL_BIO_get_len(bp)) <= 0) {
    #if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX)
            /* No certificate in buffer */
            WOLFSSL_ERROR(ASN_NO_PEM_HEADER);
    #endif
            return NULL;
        }

        pem = (unsigned char*)XMALLOC(l, 0, DYNAMIC_TYPE_PEM);
        if (pem == NULL)
            return NULL;
        XMEMSET(pem, 0, l);

        i = 0;
        if (wc_PemGetHeaderFooter(type, NULL, &footer) != 0) {
            XFREE(pem, 0, DYNAMIC_TYPE_PEM);
            return NULL;
        }
        footerSz = (long)XSTRLEN(footer);

        /* TODO: Inefficient
         * reading in one byte at a time until see the footer
         */
        while ((l = wolfSSL_BIO_read(bp, (char *)&pem[i], 1)) == 1) {
            i++;
            if (i > footerSz && XMEMCMP((char *)&pem[i-footerSz], footer,
                    footerSz) == 0) {
                if (wolfSSL_BIO_read(bp, (char *)&pem[i], 1) == 1) {
                    /* attempt to read newline following footer */
                    i++;
                    if (pem[i-1] == '\r') {
                        /* found \r , Windows line ending is \r\n so try to read one
                         * more byte for \n, ignoring return value */
                        (void)wolfSSL_BIO_read(bp, (char *)&pem[i++], 1);
                    }
                }
                break;
            }
        }
    #if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX)
        if (l == 0)
            WOLFSSL_ERROR(ASN_NO_PEM_HEADER);
    #endif
        pemSz = (int)i;
    #ifdef WOLFSSL_CERT_REQ
        if (type == CERTREQ_TYPE)
            x509 = wolfSSL_X509_REQ_load_certificate_buffer(pem, pemSz,
                                                        WOLFSSL_FILETYPE_PEM);
        else
    #endif
            x509 = wolfSSL_X509_load_certificate_buffer(pem, pemSz,
                                                        WOLFSSL_FILETYPE_PEM);

        if (x != NULL) {
            *x = x509;
        }

        XFREE(pem, NULL, DYNAMIC_TYPE_PEM);

#endif /* WOLFSSL_PEM_TO_DER || WOLFSSL_DER_TO_PEM */
        (void)bp;
        (void)x;
        (void)cb;
        (void)u;

        return x509;
    }


    WOLFSSL_X509 *wolfSSL_PEM_read_bio_X509(WOLFSSL_BIO *bp, WOLFSSL_X509 **x,
                                                 pem_password_cb *cb, void *u)
    {
        return loadX509orX509REQFromPemBio(bp, x, cb, u, CERT_TYPE);
    }

#ifdef WOLFSSL_CERT_REQ
    WOLFSSL_X509 *wolfSSL_PEM_read_bio_X509_REQ(WOLFSSL_BIO *bp, WOLFSSL_X509 **x,
                                                 pem_password_cb *cb, void *u)
    {
        return loadX509orX509REQFromPemBio(bp, x, cb, u, CERTREQ_TYPE);
    }
#endif

    WOLFSSL_X509_CRL *wolfSSL_PEM_read_bio_X509_CRL(WOLFSSL_BIO *bp,
            WOLFSSL_X509_CRL **x, pem_password_cb *cb, void *u)
    {
#if defined(WOLFSSL_PEM_TO_DER) && defined(HAVE_CRL)
        unsigned char* pem = NULL;
        int pemSz;
        int derSz;
        DerBuffer* der = NULL;
        WOLFSSL_X509_CRL* crl = NULL;

        if ((pemSz = wolfSSL_BIO_get_len(bp)) <= 0) {
            goto err;
        }

        pem = (unsigned char*)XMALLOC(pemSz, 0, DYNAMIC_TYPE_PEM);
        if (pem == NULL) {
            goto err;
        }

        if (wolfSSL_BIO_read(bp, pem, pemSz) != pemSz) {
            goto err;
        }

        if((PemToDer(pem, pemSz, CRL_TYPE, &der, NULL, NULL, NULL)) < 0) {
            goto err;
        }
        derSz = der->length;
        if((crl = wolfSSL_d2i_X509_CRL(x, der->buffer, derSz)) == NULL) {
            goto err;
        }

err:
        if(pem != NULL) {
            XFREE(pem, 0, DYNAMIC_TYPE_PEM);
        }
        if(der != NULL) {
            FreeDer(&der);
        }

        (void)cb;
        (void)u;

        return crl;
#else
        (void)bp;
        (void)x;
        (void)cb;
        (void)u;

        return NULL;
#endif
    }

#endif /* !NO_BIO */

#if !defined(NO_FILESYSTEM)
    static void* wolfSSL_PEM_read_X509_ex(XFILE fp, void **x,
        pem_password_cb *cb, void *u, int type)
    {
        unsigned char* pem = NULL;
        int pemSz;
        long i = 0, l;
        void *newx509;
        int derSz;
        DerBuffer* der = NULL;

        WOLFSSL_ENTER("wolfSSL_PEM_read_X509");

        if (fp == XBADFILE) {
            WOLFSSL_LEAVE("wolfSSL_PEM_read_X509", BAD_FUNC_ARG);
            return NULL;
        }
        /* Read cert from file */
        i = XFTELL(fp);
        if (i < 0) {
            WOLFSSL_LEAVE("wolfSSL_PEM_read_X509", BAD_FUNC_ARG);
            return NULL;
        }

        if (XFSEEK(fp, 0, XSEEK_END) != 0)
            return NULL;
        l = XFTELL(fp);
        if (l < 0)
            return NULL;
        if (XFSEEK(fp, i, SEEK_SET) != 0)
            return NULL;
        pemSz = (int)(l - i);

        /* check calculated length */
        if (pemSz > MAX_WOLFSSL_FILE_SIZE || pemSz < 0) {
            WOLFSSL_MSG("PEM_read_X509_ex file size error");
            return NULL;
        }

        /* allocate pem buffer */
        pem = (unsigned char*)XMALLOC(pemSz, NULL, DYNAMIC_TYPE_PEM);
        if (pem == NULL)
            return NULL;

        if ((int)XFREAD((char *)pem, 1, pemSz, fp) != pemSz)
            goto err_exit;

        switch (type) {
            case CERT_TYPE:
                newx509 = (void *)wolfSSL_X509_load_certificate_buffer(pem,
                    pemSz, WOLFSSL_FILETYPE_PEM);
                break;

        #ifdef HAVE_CRL
            case CRL_TYPE:
                if ((PemToDer(pem, pemSz, CRL_TYPE, &der, NULL, NULL, NULL)) < 0)
                    goto err_exit;
                derSz = der->length;
                newx509 = (void*)wolfSSL_d2i_X509_CRL((WOLFSSL_X509_CRL **)x,
                    (const unsigned char *)der->buffer, derSz);
                if (newx509 == NULL)
                    goto err_exit;
                FreeDer(&der);
                break;
        #endif

            default:
                goto err_exit;
        }
        if (x != NULL) {
            *x = newx509;
        }
        XFREE(pem, NULL, DYNAMIC_TYPE_PEM);
        return newx509;

    err_exit:
        if (pem != NULL)
            XFREE(pem, NULL, DYNAMIC_TYPE_PEM);
        if (der != NULL)
            FreeDer(&der);

        /* unused */
        (void)cb;
        (void)u;
	    (void)derSz;

        return NULL;
    }

    WOLFSSL_API WOLFSSL_X509* wolfSSL_PEM_read_X509(XFILE fp, WOLFSSL_X509 **x,
                                                    pem_password_cb *cb, void *u)
    {
        return (WOLFSSL_X509* )wolfSSL_PEM_read_X509_ex(fp, (void **)x, cb, u, CERT_TYPE);
    }

#if defined(HAVE_CRL)
    WOLFSSL_API WOLFSSL_X509_CRL* wolfSSL_PEM_read_X509_CRL(XFILE fp, WOLFSSL_X509_CRL **crl,
                                                    pem_password_cb *cb, void *u)
    {
        return (WOLFSSL_X509_CRL* )wolfSSL_PEM_read_X509_ex(fp, (void **)crl, cb, u, CRL_TYPE);
    }
#endif

#ifdef WOLFSSL_CERT_GEN
#ifndef NO_BIO
    int wolfSSL_PEM_write_X509(XFILE fp, WOLFSSL_X509* x)
    {
        int ret;
        WOLFSSL_BIO* bio;

        if (x == NULL)
            return 0;

        bio = wolfSSL_BIO_new(wolfSSL_BIO_s_file());
        if (bio == NULL)
            return 0;

        if (wolfSSL_BIO_set_fp(bio, fp, BIO_NOCLOSE) != WOLFSSL_SUCCESS) {
            wolfSSL_BIO_free(bio);
            bio = NULL;
        }

        ret = wolfSSL_PEM_write_bio_X509(bio, x);

        if (bio != NULL)
            wolfSSL_BIO_free(bio);

        return ret;
    }
#endif /* !NO_BIO */
#endif /* WOLFSSL_CERT_GEN */
#endif /* !NO_FILESYSTEM */

    #define PEM_BEGIN              "-----BEGIN "
    #define PEM_BEGIN_SZ           11
    #define PEM_END                "-----END "
    #define PEM_END_SZ             9
    #define PEM_HDR_FIN            "-----"
    #define PEM_HDR_FIN_SZ         5
    #define PEM_HDR_FIN_EOL_NEWLINE   "-----\n"
    #define PEM_HDR_FIN_EOL_NULL_TERM "-----\0"
    #define PEM_HDR_FIN_EOL_SZ     6

#ifndef NO_BIO

    int wolfSSL_PEM_read_bio(WOLFSSL_BIO* bio, char **name, char **header,
                             unsigned char **data, long *len)
    {
        int ret = WOLFSSL_SUCCESS;
        char pem[256];
        int pemLen;
        char* p;
        char* nameStr = NULL;
        int nameLen = 0;
        char* headerStr = NULL;
        int headerLen;
        int headerFound = 0;
        unsigned char* der = NULL;
        word32 derLen = 0;

        if (bio == NULL || name == NULL || header == NULL || data == NULL ||
                                                                  len == NULL) {
            return WOLFSSL_FAILURE;
        }

        /* Find header line. */
        pem[sizeof(pem) - 1] = '\0';
        while ((pemLen = wolfSSL_BIO_gets(bio, pem, sizeof(pem) - 1)) > 0) {
            if (XSTRNCMP(pem, PEM_BEGIN, PEM_BEGIN_SZ) == 0)
                break;
        }
        if (pemLen <= 0)
            ret = WOLFSSL_FAILURE;
        /* Have a header line. */
        if (ret == WOLFSSL_SUCCESS) {
            while (pem[pemLen - 1] == '\r' || pem[pemLen - 1] == '\n')
                pemLen--;
            pem[pemLen] = '\0';
            if (XSTRNCMP(pem + pemLen - PEM_HDR_FIN_SZ, PEM_HDR_FIN,
                                                         PEM_HDR_FIN_SZ) != 0) {
                ret = WOLFSSL_FAILURE;
            }
        }

        /* Get out name. */
        if (ret == WOLFSSL_SUCCESS) {
            nameLen = pemLen - PEM_BEGIN_SZ - PEM_HDR_FIN_SZ;
            nameStr = (char*)XMALLOC(nameLen + 1, NULL,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
            if (nameStr == NULL)
                ret = WOLFSSL_FAILURE;
        }
        if (ret == WOLFSSL_SUCCESS) {
            XSTRNCPY(nameStr, pem + PEM_BEGIN_SZ, nameLen);
            nameStr[nameLen] = '\0';

            /* Get header of PEM - encryption header. */
            headerLen = 0;
            while ((pemLen = wolfSSL_BIO_gets(bio, pem, sizeof(pem) - 1)) > 0) {
                while (pemLen > 0 && (pem[pemLen - 1] == '\r' ||
                                                     pem[pemLen - 1] == '\n')) {
                    pemLen--;
                }
                pem[pemLen++] = '\n';
                pem[pemLen] = '\0';

                /* Header separator is a blank line. */
                if (pem[0] == '\n') {
                    headerFound = 1;
                    break;
                }

                /* Didn't find a blank line - no header. */
                if (XSTRNCMP(pem, PEM_END, PEM_END_SZ) == 0) {
                    der = (unsigned char*)headerStr;
                    derLen = headerLen;
                    /* Empty header - empty string. */
                    headerStr = (char*)XMALLOC(1, NULL,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
                    if (headerStr == NULL)
                        ret = WOLFSSL_FAILURE;
                    else
                        headerStr[0] = '\0';
                    break;
                }

                p = (char*)XREALLOC(headerStr, headerLen + pemLen + 1, NULL,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
                if (p == NULL) {
                    ret = WOLFSSL_FAILURE;
                    break;
                }

                headerStr = p;
                XMEMCPY(headerStr + headerLen, pem, pemLen + 1);
                headerLen += pemLen;
            }
            if (pemLen <= 0)
                ret = WOLFSSL_FAILURE;
        }

        /* Get body of PEM - if there was a header */
        if (ret == WOLFSSL_SUCCESS && headerFound) {
            derLen = 0;
            while ((pemLen = wolfSSL_BIO_gets(bio, pem, sizeof(pem) - 1)) > 0) {
                while (pemLen > 0 && (pem[pemLen - 1] == '\r' ||
                                                     pem[pemLen - 1] == '\n')) {
                    pemLen--;
                }
                pem[pemLen++] = '\n';
                pem[pemLen] = '\0';

                if (XSTRNCMP(pem, PEM_END, PEM_END_SZ) == 0)
                    break;

                p = (char*)XREALLOC(der, derLen + pemLen + 1, NULL,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
                if (p == NULL) {
                    ret = WOLFSSL_FAILURE;
                    break;
                }

                der = (unsigned char*)p;
                XMEMCPY(der + derLen, pem, pemLen + 1);
                derLen += pemLen;
            }
            if (pemLen <= 0)
                ret = WOLFSSL_FAILURE;
        }

        /* Check trailer. */
        if (ret == WOLFSSL_SUCCESS) {
            if (XSTRNCMP(pem + PEM_END_SZ, nameStr, nameLen) != 0)
                ret = WOLFSSL_FAILURE;
        }
        if (ret == WOLFSSL_SUCCESS) {
            if (XSTRNCMP(pem + PEM_END_SZ + nameLen,
                    PEM_HDR_FIN_EOL_NEWLINE,
                    PEM_HDR_FIN_EOL_SZ) != 0 &&
                XSTRNCMP(pem + PEM_END_SZ + nameLen,
                        PEM_HDR_FIN_EOL_NULL_TERM,
                        PEM_HDR_FIN_EOL_SZ) != 0) {
                ret = WOLFSSL_FAILURE;
            }
        }

        /* Base64 decode body. */
        if (ret == WOLFSSL_SUCCESS) {
            if (Base64_Decode(der, derLen, der, &derLen) != 0)
                ret = WOLFSSL_FAILURE;
        }

        if (ret == WOLFSSL_SUCCESS) {
            *name = nameStr;
            *header = headerStr;
            *data = der;
            *len = derLen;
            nameStr = NULL;
            headerStr = NULL;
            der = NULL;
        }

        if (nameStr != NULL)
            XFREE(nameStr, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        if (headerStr != NULL)
            XFREE(headerStr, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        if (der != NULL)
            XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER);

        return ret;
    }

    int wolfSSL_PEM_write_bio(WOLFSSL_BIO* bio, const char *name,
                              const char *header, const unsigned char *data,
                              long len)
    {
        int err = 0;
        int outSz = 0;
        int nameLen;
        int headerLen;
        byte* pem = NULL;
        word32 pemLen;
        word32 derLen = (word32)len;

        if (bio == NULL || name == NULL || header == NULL || data == NULL)
            return 0;

        nameLen = (int)XSTRLEN(name);
        headerLen = (int)XSTRLEN(header);

        pemLen = (derLen + 2) / 3 * 4;
        pemLen += (pemLen + 63) / 64;

        pem = (byte*)XMALLOC(pemLen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        err = pem == NULL;
        if (!err)
            err = Base64_Encode(data, derLen, pem, &pemLen) != 0;

        if (!err) {
            err = wolfSSL_BIO_write(bio, PEM_BEGIN, PEM_BEGIN_SZ) !=
                                                              (int)PEM_BEGIN_SZ;
        }
        if (!err)
            err = wolfSSL_BIO_write(bio, name, nameLen) != nameLen;
        if (!err) {
            err = wolfSSL_BIO_write(bio, PEM_HDR_FIN_EOL_NEWLINE,
                    PEM_HDR_FIN_EOL_SZ) != (int)PEM_HDR_FIN_EOL_SZ;
        }
        if (!err && headerLen > 0) {
            err = wolfSSL_BIO_write(bio, header, headerLen) != headerLen;
            /* Blank line after a header and before body. */
            if (!err)
                err = wolfSSL_BIO_write(bio, "\n", 1) != 1;
            headerLen++;
        }
        if (!err)
            err = wolfSSL_BIO_write(bio, pem, pemLen) != (int)pemLen;
        if (!err)
            err = wolfSSL_BIO_write(bio, PEM_END, PEM_END_SZ) !=
                                                                (int)PEM_END_SZ;
        if (!err)
            err = wolfSSL_BIO_write(bio, name, nameLen) != nameLen;
        if (!err) {
            err = wolfSSL_BIO_write(bio, PEM_HDR_FIN_EOL_NEWLINE,
                    PEM_HDR_FIN_EOL_SZ) != (int)PEM_HDR_FIN_EOL_SZ;
        }

        if (!err) {
            outSz = PEM_BEGIN_SZ + nameLen + PEM_HDR_FIN_EOL_SZ + headerLen +
                             pemLen + PEM_END_SZ + nameLen + PEM_HDR_FIN_EOL_SZ;
        }

        if (pem != NULL)
            XFREE(pem, NULL, DYNAMIC_TYPE_TMP_BUFFER);

        return outSz;
    }

#if !defined(NO_FILESYSTEM)
    int wolfSSL_PEM_read(XFILE fp, char **name, char **header,
                         unsigned char **data, long *len)
    {
        int ret;
        WOLFSSL_BIO* bio;

        if (name == NULL || header == NULL || data == NULL || len == NULL)
            return WOLFSSL_FAILURE;

        bio = wolfSSL_BIO_new(wolfSSL_BIO_s_file());
        if (bio == NULL)
            return 0;

        if (wolfSSL_BIO_set_fp(bio, fp, BIO_NOCLOSE) != WOLFSSL_SUCCESS) {
            wolfSSL_BIO_free(bio);
            bio = NULL;
        }

        ret = wolfSSL_PEM_read_bio(bio, name, header, data, len);

        if (bio != NULL)
            wolfSSL_BIO_free(bio);

        return ret;
    }

    int wolfSSL_PEM_write(XFILE fp, const char *name, const char *header,
                          const unsigned char *data, long len)
    {
        int ret;
        WOLFSSL_BIO* bio;

        if (name == NULL || header == NULL || data == NULL)
            return 0;

        bio = wolfSSL_BIO_new(wolfSSL_BIO_s_file());
        if (bio == NULL)
            return 0;

        if (wolfSSL_BIO_set_fp(bio, fp, BIO_NOCLOSE) != WOLFSSL_SUCCESS) {
            wolfSSL_BIO_free(bio);
            bio = NULL;
        }

        ret = wolfSSL_PEM_write_bio(bio, name, header, data, len);

        if (bio != NULL)
            wolfSSL_BIO_free(bio);

        return ret;
    }
#endif
#endif /* !NO_BIO */

    int wolfSSL_PEM_get_EVP_CIPHER_INFO(const char* header,
                                        EncryptedInfo* cipher)
    {
        if (header == NULL || cipher == NULL)
            return WOLFSSL_FAILURE;

        XMEMSET(cipher, 0, sizeof(*cipher));

        if (wc_EncryptedInfoParse(cipher, &header, XSTRLEN(header)) != 0)
            return WOLFSSL_FAILURE;

        return WOLFSSL_SUCCESS;
    }

    int wolfSSL_PEM_do_header(EncryptedInfo* cipher, unsigned char* data,
                              long* len, pem_password_cb* callback, void* ctx)
    {
        int ret = WOLFSSL_SUCCESS;
        char password[NAME_SZ];
        int passwordSz;

        if (cipher == NULL || data == NULL || len == NULL || callback == NULL)
            return WOLFSSL_FAILURE;

        passwordSz = callback(password, sizeof(password), PEM_PASS_READ, ctx);
        if (passwordSz < 0)
            ret = WOLFSSL_FAILURE;

        if (ret == WOLFSSL_SUCCESS) {
            if (wc_BufferKeyDecrypt(cipher, data, (word32)*len, (byte*)password,
                                                     passwordSz, WC_MD5) != 0) {
                ret = WOLFSSL_FAILURE;
            }
        }

        if (passwordSz > 0)
            XMEMSET(password, 0, passwordSz);

        return ret;
    }

#ifndef NO_BIO
    /*
     * bp : bio to read X509 from
     * x  : x509 to write to
     * cb : password call back for reading PEM
     * u  : password
     * _AUX is for working with a trusted X509 certificate
     */
    WOLFSSL_X509 *wolfSSL_PEM_read_bio_X509_AUX(WOLFSSL_BIO *bp,
                               WOLFSSL_X509 **x, pem_password_cb *cb, void *u) {
        WOLFSSL_ENTER("wolfSSL_PEM_read_bio_X509");

        /* AUX info is; trusted/rejected uses, friendly name, private key id,
         * and potentially a stack of "other" info. wolfSSL does not store
         * friendly name or private key id yet in WOLFSSL_X509 for human
         * readability and does not support extra trusted/rejected uses for
         * root CA. */
        return wolfSSL_PEM_read_bio_X509(bp, x, cb, u);
    }
#endif /* !NO_BIO */


#endif /* OPENSSL_EXTRA || OPENSSL_ALL */
#ifdef OPENSSL_ALL

#ifndef NO_BIO
    /* create and return a new WOLFSSL_X509_PKEY structure or NULL on failure */
    static WOLFSSL_X509_PKEY* wolfSSL_X509_PKEY_new(void* heap)
    {
        WOLFSSL_X509_PKEY* ret;

        ret = (WOLFSSL_X509_PKEY*)XMALLOC(sizeof(WOLFSSL_X509_PKEY), heap,
            DYNAMIC_TYPE_KEY);
        if (ret != NULL) {
            XMEMSET(ret, 0, sizeof(WOLFSSL_X509_PKEY));
            ret->heap = heap;
        }
        return ret;
    }


    /* sets the values of X509_PKEY based on certificate passed in
     * return WOLFSSL_SUCCESS on success */
    static int wolfSSL_X509_PKEY_set(WOLFSSL_X509_PKEY* xPkey,
            WOLFSSL_X509* x509)
    {
        if (xPkey == NULL || x509 == NULL) {
            return BAD_FUNC_ARG;
        }
        wolfSSL_EVP_PKEY_free(xPkey->dec_pkey);
        xPkey->dec_pkey = wolfSSL_X509_get_pubkey(x509);
        if (xPkey->dec_pkey == NULL) {
            return WOLFSSL_FAILURE;
        }
        return WOLFSSL_SUCCESS;
    }
#endif /* !NO_BIO */


    /* free up all memory used by "xPkey" passed in */
    static void wolfSSL_X509_PKEY_free(WOLFSSL_X509_PKEY* xPkey)
    {
        if (xPkey != NULL) {
            wolfSSL_EVP_PKEY_free(xPkey->dec_pkey);
            XFREE(xPkey, xPkey->heap, DYNAMIC_TYPE_KEY);
        }
    }


#ifndef NO_BIO

    /* Takes control of x509 on success
     * helper function to break out code needed to set WOLFSSL_X509_INFO up
     * free's "info" passed in if is not defaults
     *
     * returns WOLFSSL_SUCCESS on success
     */
    static int wolfSSL_X509_INFO_set(WOLFSSL_X509_INFO** info,
            WOLFSSL_X509* x509)
    {
        if (info == NULL || x509 == NULL) {
            return BAD_FUNC_ARG;
        }

        if (*info == NULL) {
            return BAD_FUNC_ARG;
        }

        /* check is fresh "info" passed in, if not free it */
        if ((*info)->x509 != NULL || (*info)->x_pkey != NULL) {
            WOLFSSL_X509_INFO* tmp;

            tmp = wolfSSL_X509_INFO_new();
            if (tmp == NULL) {
                WOLFSSL_MSG("Unable to create new structure");
                return MEMORY_E;
            }
            wolfSSL_X509_INFO_free(*info);
            (*info) = tmp;
        }

        (*info)->x509 = x509;

        //@TODO info->num
        //@TODO info->enc_cipher
        //@TODO info->enc_len
        //@TODO info->enc_data
        //@TODO info->crl

        (*info)->x_pkey = wolfSSL_X509_PKEY_new(x509->heap);
        return wolfSSL_X509_PKEY_set((*info)->x_pkey, x509);
    }

    /**
     * This read one structure from bio and returns the read structure
     * in the appropriate output parameter (x509, crl, x_pkey). The
     * output parameters must be set to NULL.
     * @param bio    Input for reading structures
     * @param cb     Password callback
     * @param x509   Output
     * @param crl    Output
     * @param x_pkey Output
     * @return WOLFSSL_SUCCESSS on success and WOLFSSL_FAILURE otherwise
     */
    static int wolfSSL_PEM_X509_X509_CRL_X509_PKEY_read_bio(
            WOLFSSL_BIO* bio, pem_password_cb* cb,
            WOLFSSL_X509** x509, WOLFSSL_X509_CRL** crl, WOLFSSL_X509_PKEY** x_pkey)
    {

#if defined(WOLFSSL_PEM_TO_DER) || defined(WOLFSSL_DER_TO_PEM)
        char* pem = NULL;
        long  i = pem_struct_min_sz, l;
        const char* header = NULL;
        const char* headerEnd = NULL;
        const char* footer = NULL;
        const char* footerEnd = NULL;
    #ifdef HAVE_CRL
        DerBuffer* der = NULL;
    #endif

        (void)cb;

        if (!bio || !x509 || *x509 || !crl || *crl || !x_pkey || *x_pkey) {
            WOLFSSL_MSG("Bad input parameter or output parameters "
                        "not set to a NULL value.");
            return WOLFSSL_FAILURE;
        }

        if ((l = wolfSSL_BIO_get_len(bio)) <= 0) {
    #if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX)
            /* No certificate in buffer */
            WOLFSSL_ERROR(ASN_NO_PEM_HEADER);
    #endif
            return WOLFSSL_FAILURE;
        }

        pem = (char*)XMALLOC(l, 0, DYNAMIC_TYPE_PEM);
        if (pem == NULL)
            return WOLFSSL_FAILURE;

        if (wolfSSL_BIO_read(bio, &pem[0], pem_struct_min_sz) !=
                pem_struct_min_sz) {
            goto err;
        }

        /* Read the header and footer */
        while (wolfSSL_BIO_read(bio, &pem[i], 1) == 1) {
            i++;
            if (!header) {
                header = XSTRNSTR(pem, "-----BEGIN ", (unsigned int)i);
            }
            else {
                if (!headerEnd) {
                    headerEnd = XSTRNSTR(header + XSTR_SIZEOF("-----BEGIN "),
                            "-----",
                            (unsigned int)
                            (i - (header + XSTR_SIZEOF("-----BEGIN ") - pem)));
                    if (headerEnd) {
                        headerEnd += XSTR_SIZEOF("-----");
                        /* Read in the newline */
                        (void)wolfSSL_BIO_read(bio, &pem[i], 1);
                        i++;
                        if (*headerEnd != '\n' && *headerEnd != '\r') {
                            WOLFSSL_MSG("Missing newline after header");
                            goto err;
                        }
                    }
                }
                else if (!footer) {
                    footer = XSTRNSTR(headerEnd, "-----END ",
                            (unsigned int)(i - (headerEnd - pem)));
                }
                else if (!footerEnd) {
                    footerEnd = XSTRNSTR(footer + XSTR_SIZEOF("-----"),
                            "-----", (unsigned int)(i -
                                (footer + XSTR_SIZEOF("-----") - pem)));
                    if (footerEnd) {
                        footerEnd += XSTR_SIZEOF("-----");
                        /* Now check that footer matches header */
                        if (XMEMCMP(header + XSTR_SIZEOF("-----BEGIN "),
                                    footer + XSTR_SIZEOF("-----END "),
                            headerEnd - (header + XSTR_SIZEOF("-----BEGIN ")))
                                != 0) {
                            WOLFSSL_MSG("Header and footer don't match");
                            goto err;
                        }
                        /* header and footer match */
                        break;
                    }
                }
                else {
                    break;
                }
            }
        }
        if (!footerEnd) {
            /* Only check footerEnd since it is set last */
            WOLFSSL_ERROR(ASN_NO_PEM_HEADER);
            goto err;
        }
        else {
            if (headerEnd - header ==
                    XSTR_SIZEOF("-----BEGIN CERTIFICATE-----") &&
                    XMEMCMP(header, "-----BEGIN CERTIFICATE-----",
                            XSTR_SIZEOF("-----BEGIN CERTIFICATE-----")) == 0) {
                /* We have a certificate */
                WOLFSSL_MSG("Parsing x509 cert");
                *x509 = wolfSSL_X509_load_certificate_buffer(
                        (const unsigned char*) header,
                        (int)(footerEnd - header), WOLFSSL_FILETYPE_PEM);
                if (!*x509) {
                    WOLFSSL_MSG("wolfSSL_X509_load_certificate_buffer error");
                    goto err;
                }
            }
    #ifdef HAVE_CRL
            else if (headerEnd - header ==
                    XSTR_SIZEOF("-----BEGIN X509 CRL-----") &&
                    XMEMCMP(header, "-----BEGIN X509 CRL-----",
                            XSTR_SIZEOF("-----BEGIN X509 CRL-----")) == 0) {
                /* We have a crl */
                WOLFSSL_MSG("Parsing crl");
                if((PemToDer((const unsigned char*) header, footerEnd - header,
                        CRL_TYPE, &der, NULL, NULL, NULL)) < 0) {
                    WOLFSSL_MSG("PemToDer error");
                    goto err;
                }
                *crl = wolfSSL_d2i_X509_CRL(NULL, der->buffer, der->length);
                if (!*crl) {
                    WOLFSSL_MSG("wolfSSL_d2i_X509_CRL error");
                    goto err;
                }
            }
    #endif
            else {
                /* TODO support WOLFSSL_X509_PKEY as well */
                WOLFSSL_MSG("Unsupported PEM structure");
                goto err;
            }
        }

        XFREE(pem, 0, DYNAMIC_TYPE_PEM);
    #ifdef HAVE_CRL
        if (der)
            FreeDer(&der);
    #endif
        return WOLFSSL_SUCCESS;
err:
        if (pem)
            XFREE(pem, 0, DYNAMIC_TYPE_PEM);
    #ifdef HAVE_CRL
        if (der)
            FreeDer(&der);
    #endif
        return WOLFSSL_FAILURE;
#endif /* WOLFSSL_PEM_TO_DER || WOLFSSL_DER_TO_PEM */
    }

    /*
     * bio WOLFSSL_BIO to read certificates from
     * sk  possible stack to push more X509_INFO structs to. Can be NULL
     * cb  callback password for encrypted PEM certificates
     * u   user input such as password
     *
     * returns stack on success and NULL or default stack passed in on fail
     */
    WOLF_STACK_OF(WOLFSSL_X509_INFO)* wolfSSL_PEM_X509_INFO_read_bio(
        WOLFSSL_BIO* bio, WOLF_STACK_OF(WOLFSSL_X509_INFO)* sk,
        pem_password_cb* cb, void* u)
    {
        WOLF_STACK_OF(WOLFSSL_X509_INFO)* localSk = NULL;
        int ret = WOLFSSL_SUCCESS;

        (void)u;

        WOLFSSL_ENTER("wolfSSL_PEM_X509_INFO_read_bio");

        /* parse through BIO and push new info's found onto stack */
        while (1) {
            WOLFSSL_X509      *x509 = NULL;
            WOLFSSL_X509_CRL  *crl  = NULL;
            WOLFSSL_X509_PKEY *x_pkey = NULL;

            if (wolfSSL_PEM_X509_X509_CRL_X509_PKEY_read_bio(bio, cb,
                    &x509, &crl, &x_pkey) == WOLFSSL_SUCCESS) {
                WOLFSSL_X509_INFO* current;

                current = wolfSSL_X509_INFO_new();
                if (current == NULL) {
                    WOLFSSL_LEAVE("wolfSSL_PEM_X509_INFO_read_bio", MEMORY_E);
                    wolfSSL_sk_free(localSk);
                    return NULL;
                }
                if (x509) {
                    ret = wolfSSL_X509_INFO_set(&current, x509);
                }
                else if (crl) {
                    current->crl = crl;
                    ret = WOLFSSL_SUCCESS;
                }
                else if (x_pkey) {
                    current->x_pkey = x_pkey;
                    ret = WOLFSSL_SUCCESS;
                }
                else {
                    WOLFSSL_MSG("No output parameters set");
                    WOLFSSL_LEAVE("wolfSSL_PEM_X509_INFO_read_bio", WOLFSSL_FAILURE);
                    wolfSSL_sk_free(localSk);
                    wolfSSL_X509_INFO_free(current);
                    return NULL;
                }
                if (ret != WOLFSSL_SUCCESS) {
                    wolfSSL_X509_free(x509);
#ifdef HAVE_CRL
                    wolfSSL_X509_CRL_free(crl);
#endif
                    wolfSSL_X509_PKEY_free(x_pkey);
                }
                else {
                    if (!localSk) {
                        /* attempt to used passed in stack
                         * or create a new one */
                        if (sk != NULL) {
                            localSk = sk;
                        }
                        else {
                            localSk = wolfSSL_sk_X509_INFO_new_null();
                        }
                        if (localSk == NULL) {
                            WOLFSSL_LEAVE("wolfSSL_PEM_X509_INFO_read_bio",
                                    MEMORY_E);
                            return NULL;
                        }
                    }
                    wolfSSL_sk_X509_INFO_push(localSk, current);
                }
            }
            else {
                break;
            }
        }
        WOLFSSL_LEAVE("wolfSSL_PEM_X509_INFO_read_bio", ret);
        return localSk;
    }
#endif /* !NO_BIO */
#endif /* OPENSSL_ALL */

    void wolfSSL_X509_NAME_ENTRY_free(WOLFSSL_X509_NAME_ENTRY* ne)
    {
        WOLFSSL_ENTER("wolfSSL_X509_NAME_ENTRY_free");
        if (ne != NULL) {
            wolfSSL_ASN1_OBJECT_free(ne->object);
            if (ne->value != NULL) {
                wolfSSL_ASN1_STRING_free(ne->value);
            }
            XFREE(ne, NULL, DYNAMIC_TYPE_NAME_ENTRY);
        }
    }


    WOLFSSL_X509_NAME_ENTRY* wolfSSL_X509_NAME_ENTRY_new(void)
    {
        WOLFSSL_X509_NAME_ENTRY* ne;

        ne = (WOLFSSL_X509_NAME_ENTRY*)XMALLOC(sizeof(WOLFSSL_X509_NAME_ENTRY),
                NULL, DYNAMIC_TYPE_NAME_ENTRY);
        if (ne != NULL) {
            XMEMSET(ne, 0, sizeof(WOLFSSL_X509_NAME_ENTRY));
        }

        return ne;
    }


    /* Create a new WOLFSSL_X509_NAME_ENTRY structure based on the text passed
     * in. Returns NULL on failure */
    WOLFSSL_X509_NAME_ENTRY* wolfSSL_X509_NAME_ENTRY_create_by_txt(
            WOLFSSL_X509_NAME_ENTRY **neIn, const char *txt, int type,
            const unsigned char *data, int dataSz)
    {
        int nid = -1;
        WOLFSSL_X509_NAME_ENTRY* ne = NULL;

        WOLFSSL_ENTER("wolfSSL_X509_NAME_ENTRY_create_by_txt()");

        if (txt == NULL) {
            return NULL;
        }

        if (neIn != NULL) {
            ne = *neIn;
        }

        nid = wolfSSL_OBJ_txt2nid(txt);
        if (nid == NID_undef) {
            WOLFSSL_MSG("Unable to find text");
            ne = NULL;
        }
        else {
            if (ne == NULL) {
                ne = wolfSSL_X509_NAME_ENTRY_new();
                if (ne == NULL) {
                    return NULL;
                }
            }
            ne->nid = nid;
            ne->object = wolfSSL_OBJ_nid2obj_ex(nid, ne->object);
            ne->value = wolfSSL_ASN1_STRING_type_new(type);
            if (ne->value != NULL) {
                if (wolfSSL_ASN1_STRING_set(ne->value, (const void*)data,
                                            dataSz) == WOLFSSL_SUCCESS) {
                    ne->set = 1;
                }
            }
        }

        return ne;
    }


    /* Creates a new entry given the NID, type, and data
     * "dataSz" is number of bytes in data, if set to -1 then XSTRLEN is used
     * "out" can be used to store the new entry data in an existing structure
     *       if NULL then a new WOLFSSL_X509_NAME_ENTRY structure is created
     * returns a pointer to WOLFSSL_X509_NAME_ENTRY on success and NULL on fail
     */
    WOLFSSL_X509_NAME_ENTRY* wolfSSL_X509_NAME_ENTRY_create_by_NID(
            WOLFSSL_X509_NAME_ENTRY** out, int nid, int type,
            const unsigned char* data, int dataSz)
    {
        WOLFSSL_X509_NAME_ENTRY* ne;

        WOLFSSL_ENTER("wolfSSL_X509_NAME_ENTRY_create_by_NID()");

        if (!data) {
            WOLFSSL_MSG("Bad parameter");
            return NULL;
        }

        if (out == NULL || *out == NULL) {
            ne = wolfSSL_X509_NAME_ENTRY_new();
            if (ne == NULL) {
                return NULL;
            }
            if (out != NULL) {
                *out = ne;
            }
        }
        else {
            ne = *out;
        }

        ne->nid = nid;
        ne->object = wolfSSL_OBJ_nid2obj_ex(nid, ne->object);
        ne->value = wolfSSL_ASN1_STRING_type_new(type);
        if (ne->value != NULL) {
            if (wolfSSL_ASN1_STRING_set(ne->value, (const void*)data, dataSz)
                    == WOLFSSL_SUCCESS) {
                ne->set = 1;
            }
        }

        return ne;
    }

    /* add all entry of type "nid" to the buffer "fullName" and advance "idx"
     * since number of entries is small, a brute force search is used here
     * returns the number of entries added
     */
    static int AddAllEntry(WOLFSSL_X509_NAME* name, char* fullName,
            int fullNameSz, int* idx)
    {
        int i;
        int ret = 0;

        for (i = 0; i < MAX_NAME_ENTRIES; i++) {
            if (name->entry[i].set) {
                WOLFSSL_X509_NAME_ENTRY* e;
                WOLFSSL_ASN1_OBJECT* obj;

                int sz;
                unsigned char* data;

                e = &name->entry[i];
                obj = wolfSSL_X509_NAME_ENTRY_get_object(e);
                if (obj == NULL) {
                    return BAD_FUNC_ARG;
                }

                XMEMCPY(fullName + *idx, "/", 1); *idx = *idx + 1;
                sz = (int)XSTRLEN(obj->sName);
                XMEMCPY(fullName + *idx, obj->sName, sz);
                *idx += sz;
                XMEMCPY(fullName + *idx, "=", 1); *idx = *idx + 1;

                data = wolfSSL_ASN1_STRING_data(e->value);
                if (data != NULL) {
                    sz = (int)XSTRLEN((const char*)data);
                    XMEMCPY(fullName + *idx, data, sz);
                    *idx += sz;
                }

                ret++;
            }
        }
        (void)fullNameSz;
        return ret;
    }


    /* Converts a list of entries in WOLFSSL_X509_NAME struct into a string
     * returns 0 on success */
    static int RebuildFullName(WOLFSSL_X509_NAME* name)
    {
        int totalLen = 0, i, idx, entryCount = 0;
        char* fullName;

        if (name == NULL)
            return BAD_FUNC_ARG;

        for (i = 0; i < MAX_NAME_ENTRIES; i++) {
            if (name->entry[i].set) {
                WOLFSSL_X509_NAME_ENTRY* e;
                WOLFSSL_ASN1_OBJECT* obj;

                e = &name->entry[i];
                obj = wolfSSL_X509_NAME_ENTRY_get_object(e);
                if (obj == NULL)
                    return BAD_FUNC_ARG;

                totalLen += (int)XSTRLEN(obj->sName) + 2;/*+2 for '/' and '=' */
                totalLen += wolfSSL_ASN1_STRING_length(e->value);
            }
        }

        fullName = (char*)XMALLOC(totalLen + 1, name->heap, DYNAMIC_TYPE_X509);
        if (fullName == NULL)
            return MEMORY_E;

        idx = 0;
        entryCount = AddAllEntry(name, fullName, totalLen, &idx);
        if (entryCount < 0) {
            XFREE(fullName, name->heap, DYNAMIC_TYPE_X509);
            return entryCount;
        }

        if (name->dynamicName) {
            XFREE(name->name, name->heap, DYNAMIC_TYPE_X509);
        }
        fullName[idx] = '\0';
        name->name = fullName;
        name->dynamicName = 1;
        name->sz = idx + 1; /* size includes null terminator */
        name->entrySz = entryCount;

        return 0;
    }

    /* Copies entry into name. With it being copied freeing entry becomes the
     * callers responsibility.
     * returns 1 for success and 0 for error */
    int wolfSSL_X509_NAME_add_entry(WOLFSSL_X509_NAME* name,
            WOLFSSL_X509_NAME_ENTRY* entry, int idx, int set)
    {
        WOLFSSL_X509_NAME_ENTRY* current = NULL;
        int i;

        WOLFSSL_ENTER("wolfSSL_X509_NAME_add_entry()");

        if (name == NULL || entry == NULL || entry->value == NULL) {
            WOLFSSL_MSG("NULL argument passed in");
            return WOLFSSL_FAILURE;
        }

        if (idx >= 0) {
            /* place in specific index */

            if (idx >= MAX_NAME_ENTRIES) {
                WOLFSSL_MSG("Error index to insert entry is larger than array");
                return WOLFSSL_FAILURE;
            }
            i = idx;
        }
        else {
            /* iterate through and find first open spot */
            for (i = 0; i < MAX_NAME_ENTRIES; i++) {
                if (name->entry[i].set != 1) { /* not set so overwritten */
                    WOLFSSL_MSG("Found place for name entry");
                    break;
                }
            }

            if (i == MAX_NAME_ENTRIES) {
                WOLFSSL_MSG("No spot found for name entry");
                return WOLFSSL_FAILURE;
            }
        }

        current = &(name->entry[i]);
        if (current->set == 0)
            name->entrySz++;
        if (wolfSSL_X509_NAME_ENTRY_create_by_NID(&current,
                                entry->nid,
                                wolfSSL_ASN1_STRING_type(entry->value),
                                wolfSSL_ASN1_STRING_data(entry->value),
                                wolfSSL_ASN1_STRING_length(entry->value))
                                == NULL) {
            WOLFSSL_MSG("Issue adding the name entry");
            if (current->set == 0)
                name->entrySz--;
            return WOLFSSL_FAILURE;
        }

        if (RebuildFullName(name) != 0)
            return WOLFSSL_FAILURE;

        (void)set;
        return WOLFSSL_SUCCESS;
    }

    int wolfSSL_X509_NAME_add_entry_by_txt(WOLFSSL_X509_NAME *name,
                                           const char *field, int type,
                                           const unsigned char *bytes, int len,
                                           int loc, int set)
    {
        int ret = WOLFSSL_FAILURE;
        int nid;
        WOLFSSL_X509_NAME_ENTRY* entry;

        (void)type;
        WOLFSSL_ENTER("wolfSSL_X509_NAME_add_entry_by_txt");

        if (name == NULL || field == NULL)
            return WOLFSSL_FAILURE;

        if ((nid = wolfSSL_OBJ_txt2nid(field)) == NID_undef) {
            WOLFSSL_MSG("Unable convert text to NID");
            return WOLFSSL_FAILURE;
        }

        entry = wolfSSL_X509_NAME_ENTRY_create_by_NID(NULL,
                  nid, type, (unsigned char*)bytes, len);
        if (entry == NULL)
            return WOLFSSL_FAILURE;

        ret = wolfSSL_X509_NAME_add_entry(name, entry, loc, set);
        wolfSSL_X509_NAME_ENTRY_free(entry);

        return ret;
    }

    int wolfSSL_X509_NAME_add_entry_by_NID(WOLFSSL_X509_NAME *name, int nid,
                                           int type, const unsigned char *bytes,
                                           int len, int loc, int set)
    {
        int ret;
        WOLFSSL_X509_NAME_ENTRY* entry;
        WOLFSSL_ENTER("wolfSSL_X509_NAME_add_entry_by_NID");
        entry = wolfSSL_X509_NAME_ENTRY_create_by_NID(NULL, nid, type, bytes,
                len);
        if (entry == NULL)
            return WOLFSSL_FAILURE;
        ret = wolfSSL_X509_NAME_add_entry(name, entry, loc, set);
        wolfSSL_X509_NAME_ENTRY_free(entry);
        return ret;
    }

    WOLFSSL_X509_NAME_ENTRY *wolfSSL_X509_NAME_delete_entry(
            WOLFSSL_X509_NAME *name, int loc)
    {
        WOLFSSL_X509_NAME_ENTRY* ret;
        WOLFSSL_ENTER("wolfSSL_X509_NAME_delete_entry");

        if (!name) {
            WOLFSSL_MSG("Bad parameter");
            return NULL;
        }

        ret = wolfSSL_X509_NAME_get_entry(name, loc);
        if (!ret) {
            WOLFSSL_MSG("loc entry not found");
            return NULL;
        }
        name->entry[loc].set = 0;
        return ret;
    }

#endif /* !NO_CERTS */

    /* NID variables are dependent on compatibility header files currently
     *
     * returns a pointer to a new WOLFSSL_ASN1_OBJECT struct on success and NULL
     *         on fail
     */

    WOLFSSL_ASN1_OBJECT* wolfSSL_OBJ_nid2obj(int id)
    {
        return wolfSSL_OBJ_nid2obj_ex(id, NULL);
    }


    WOLFSSL_LOCAL WOLFSSL_ASN1_OBJECT* wolfSSL_OBJ_nid2obj_ex(int id,
                                                WOLFSSL_ASN1_OBJECT* arg_obj)
    {
        word32 oidSz = 0;
        const byte* oid;
        word32 type = 0;
        WOLFSSL_ASN1_OBJECT* obj = arg_obj;
        byte objBuf[MAX_OID_SZ + MAX_LENGTH_SZ + 1]; /* +1 for object tag */
        word32 objSz = 0;
        const char* sName = NULL;
        int i;

        WOLFSSL_ENTER("wolfSSL_OBJ_nid2obj()");

        for (i = 0; i < (int)WOLFSSL_OBJECT_INFO_SZ; i++) {
            if (wolfssl_object_info[i].nid == id) {
                id = wolfssl_object_info[i].id;
                sName = wolfssl_object_info[i].sName;
                type = wolfssl_object_info[i].type;
                break;
            }
        }
        if (i == (int)WOLFSSL_OBJECT_INFO_SZ) {
            WOLFSSL_MSG("NID not in table");
        #ifdef WOLFSSL_QT
            sName = NULL;
            type = id;
        #else
            return NULL;
        #endif
        }

    #ifdef HAVE_ECC
         if (type == 0 && wc_ecc_get_oid(id, &oid, &oidSz) > 0) {
             type = oidCurveType;
         }
    #endif /* HAVE_ECC */

        if (sName != NULL) {
            if (XSTRLEN(sName) > WOLFSSL_MAX_SNAME - 1) {
                WOLFSSL_MSG("Attempted short name is too large");
                return NULL;
            }
        }

        oid = OidFromId(id, type, &oidSz);

        /* set object ID to buffer */
        if (obj == NULL){
            obj = wolfSSL_ASN1_OBJECT_new();
            if (obj == NULL) {
                WOLFSSL_MSG("Issue creating WOLFSSL_ASN1_OBJECT struct");
                return NULL;
            }
        }
        obj->type    = id;
        obj->grp     = type;

        obj->sName[0] = '\0';
        if (sName != NULL) {
            XMEMCPY(obj->sName, (char*)sName, XSTRLEN((char*)sName));
        }

        objBuf[0] = ASN_OBJECT_ID; objSz++;
        objSz += SetLength(oidSz, objBuf + 1);
        if (oidSz) {
            XMEMCPY(objBuf + objSz, oid, oidSz);
            objSz     += oidSz;
        }

        if (obj->objSz == 0 || objSz != obj->objSz) {
            obj->objSz = objSz;
            if(((obj->dynamic & WOLFSSL_ASN1_DYNAMIC_DATA) != 0) ||
                                                           (obj->obj == NULL)) {
                if (obj->obj != NULL)
                    XFREE((byte*)obj->obj, NULL, DYNAMIC_TYPE_ASN1);
                obj->obj = (byte*)XMALLOC(obj->objSz, NULL, DYNAMIC_TYPE_ASN1);
                if (obj->obj == NULL) {
                    wolfSSL_ASN1_OBJECT_free(obj);
                    return NULL;
                }
                obj->dynamic |= WOLFSSL_ASN1_DYNAMIC_DATA ;
            }
            else {
                obj->dynamic &= ~WOLFSSL_ASN1_DYNAMIC_DATA ;
            }
        }
        XMEMCPY((byte*)obj->obj, objBuf, obj->objSz);

        (void)type;

        return obj;
    }

    static const char* oid_translate_num_to_str(const char* oid)
    {
        const struct oid_dict {
            const char* num;
            const char* desc;
        } oid_dict[] = {
            { "2.5.29.37.0",       "Any Extended Key Usage" },
            { "1.3.6.1.5.5.7.3.1", "TLS Web Server Authentication" },
            { "1.3.6.1.5.5.7.3.2", "TLS Web Client Authentication" },
            { "1.3.6.1.5.5.7.3.3", "Code Signing" },
            { "1.3.6.1.5.5.7.3.4", "E-mail Protection" },
            { "1.3.6.1.5.5.7.3.8", "Time Stamping" },
            { "1.3.6.1.5.5.7.3.9", "OCSP Signing" },
            { NULL, NULL }
        };
        const struct oid_dict* idx;

        for (idx = oid_dict; idx->num != NULL; idx++) {
            if (!XSTRNCMP(oid, idx->num, XSTRLEN(idx->num))) {
                return idx->desc;
            }
        }
        return NULL;
    }

    /* if no_name is one than use numerical form otherwise can be short name.
     *
     * returns the buffer size on success
     */
    int wolfSSL_OBJ_obj2txt(char *buf, int bufLen, WOLFSSL_ASN1_OBJECT *a, int no_name)
    {
        int bufSz;
        const char* desc;

        WOLFSSL_ENTER("wolfSSL_OBJ_obj2txt()");

        if (buf == NULL || bufLen <= 1 || a == NULL) {
            WOLFSSL_MSG("Bad input argument");
            return WOLFSSL_FAILURE;
        }

        if (no_name == 1) {
            int    length;
            word32 idx = 0;
            byte   tag;

            if (GetASNTag(a->obj, &idx, &tag, a->objSz) != 0) {
                return WOLFSSL_FAILURE;
            }

            if (tag != ASN_OBJECT_ID) {
                WOLFSSL_MSG("Bad ASN1 Object");
                return WOLFSSL_FAILURE;
            }

            if (GetLength((const byte*)a->obj, &idx, &length,
                           a->objSz) < 0 || length < 0) {
                return ASN_PARSE_E;
            }

            if (bufLen < MAX_OID_STRING_SZ) {
                bufSz = bufLen - 1;
            }
            else {
                bufSz = MAX_OID_STRING_SZ;
            }

            if ((bufSz = DecodePolicyOID(buf, (word32)bufSz, a->obj + idx,
                        (word32)length)) <= 0) {
                WOLFSSL_MSG("Error decoding OID");
                return WOLFSSL_FAILURE;
            }

        }
        else { /* return long name unless using x509small, then return short name */
#if defined(OPENSSL_EXTRA_X509_SMALL) && !defined(OPENSSL_EXTRA)
            const char* name = a->sName;
#else
            const char* name = wolfSSL_OBJ_nid2ln(wolfSSL_OBJ_obj2nid(a));
#endif

            if (name == NULL) {
                WOLFSSL_MSG("Name not found");
                return WOLFSSL_FAILURE;
            }
            if (XSTRLEN(name) + 1 < (word32)bufLen - 1) {
                bufSz = (int)XSTRLEN(name);
            }
            else {
                bufSz = bufLen - 1;
            }
            if (bufSz) {
                XMEMCPY(buf, name, bufSz);
            }
            else if (wolfSSL_OBJ_obj2txt(buf, bufLen, a, 1)) {
                if ((desc = oid_translate_num_to_str(buf))) {
                    bufSz = (int)XSTRLEN(desc);
                    XMEMCPY(buf, desc, min(bufSz, bufLen));
                }
            }
            else if (a->type == GEN_DNS || a->type == GEN_EMAIL || a->type == GEN_URI) {
                bufSz = (int)XSTRLEN((const char*)a->obj);
                XMEMCPY(buf, a->obj, min(bufSz, bufLen));
            }
        }

        buf[bufSz] = '\0';
        #ifdef WOLFSSL_QT
            /* For unknown extension types, QT expects the short name to be the
                text representation of the oid */
            if (XSTRLEN(a->sName) == 0) {
                XMEMCPY(a->sName, buf, bufSz);
            }
        #endif
        return bufSz;
    }
#endif /* OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL */

#if defined(OPENSSL_EXTRA) && !defined(NO_ASN)
    int wolfSSL_X509_NAME_get_index_by_OBJ(WOLFSSL_X509_NAME *name,
                                           const WOLFSSL_ASN1_OBJECT *obj,
                                           int idx) {
        if (!name || idx >= MAX_NAME_ENTRIES ||
                !obj || !obj->obj) {
            return -1;
        }

        if (idx < 0) {
            idx = -1;
        }

        for (idx++; idx < MAX_NAME_ENTRIES; idx++) {
            /* Find index of desired name */
            if (name->entry[idx].set) {
                if (XSTRLEN(obj->sName) == XSTRLEN(name->entry[idx].object->sName) &&
                    XSTRNCMP((const char*) obj->sName,
                        name->entry[idx].object->sName, obj->objSz - 1) == 0) {
                    return idx;
                }
            }
        }
        return -1;
    }
#endif

#if defined(OPENSSL_EXTRA) || defined(HAVE_LIGHTY) || \
    defined(WOLFSSL_MYSQL_COMPATIBLE) || defined(HAVE_STUNNEL) || \
    defined(WOLFSSL_NGINX) || defined(HAVE_POCO_LIB) || \
    defined(WOLFSSL_HAPROXY)

    char wolfSSL_CTX_use_certificate(WOLFSSL_CTX *ctx, WOLFSSL_X509 *x)
    {
        int ret;

        WOLFSSL_ENTER("wolfSSL_CTX_use_certificate");
        if (!ctx || !x || !x->derCert) {
            WOLFSSL_MSG("Bad parameter");
            return WOLFSSL_FAILURE;
        }

        FreeDer(&ctx->certificate); /* Make sure previous is free'd */
        ret = AllocDer(&ctx->certificate, x->derCert->length, CERT_TYPE,
                       ctx->heap);
        if (ret != 0)
            return WOLFSSL_FAILURE;

        XMEMCPY(ctx->certificate->buffer, x->derCert->buffer,
                x->derCert->length);
#ifdef KEEP_OUR_CERT
        if (ctx->ourCert != NULL && ctx->ownOurCert) {
            wolfSSL_X509_free(ctx->ourCert);
        }
        #ifndef WOLFSSL_X509_STORE_CERTS
        ctx->ourCert = x;
        if (wolfSSL_X509_up_ref(x) != 1) {
            return WOLFSSL_FAILURE;
        }
        #else
        ctx->ourCert = wolfSSL_X509_d2i(NULL, x->derCert->buffer,x->derCert->length);
        if(ctx->ourCert == NULL){
            return WOLFSSL_FAILURE;
        }
        #endif

        /* We own the cert because either we up its reference counter
         * or we create our own copy of the cert object. */
        ctx->ownOurCert = 1;
#endif

        /* Update the available options with public keys. */
        switch (x->pubKeyOID) {
            case RSAk:
                ctx->haveRSA = 1;
                break;
        #ifdef HAVE_ED25519
            case ED25519k:
        #endif
        #ifdef HAVE_ED448
            case ED448k:
        #endif
            case ECDSAk:
                ctx->haveECC = 1;
        #if defined(HAVE_ECC) || defined(HAVE_ED25519) || defined(HAVE_ED448)
                ctx->pkCurveOID = x->pkCurveOID;
        #endif
                break;
        }

        return WOLFSSL_SUCCESS;
    }

    int wolfSSL_CTX_add1_chain_cert(WOLFSSL_CTX* ctx, WOLFSSL_X509* x509)
    {
        int ret;
        if (ctx == NULL || x509 == NULL || x509->derCert == NULL) {
            return WOLFSSL_FAILURE;
        }

        ret = wolfSSL_CTX_load_verify_buffer(ctx, x509->derCert->buffer,
            x509->derCert->length, WOLFSSL_FILETYPE_ASN1);

        return (ret == 0) ? WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
    }

#ifndef NO_BIO
    int wolfSSL_BIO_read_filename(WOLFSSL_BIO *b, const char *name) {
    #ifndef NO_FILESYSTEM
        XFILE fp;

        WOLFSSL_ENTER("wolfSSL_BIO_new_file");

        if ((wolfSSL_BIO_get_fp(b, &fp) == WOLFSSL_SUCCESS) && (fp != XBADFILE))
        {
            XFCLOSE(fp);
        }

        fp = XFOPEN(name, "rb");
        if (fp == XBADFILE)
            return WOLFSSL_BAD_FILE;

        if (wolfSSL_BIO_set_fp(b, fp, BIO_CLOSE) != WOLFSSL_SUCCESS) {
            XFCLOSE(fp);
            return WOLFSSL_BAD_FILE;
        }

        /* file is closed when bio is free'd */
        return WOLFSSL_SUCCESS;
    #else
        (void)name;
        (void)b;
        return WOLFSSL_NOT_IMPLEMENTED;
    #endif
    }
#endif

    /* Return the corresponding short name for the nid <n>.
     * or NULL if short name can't be found.
     */
    const char * wolfSSL_OBJ_nid2sn(int n) {
        const WOLFSSL_ObjectInfo *obj_info = wolfssl_object_info;
        size_t i;
        WOLFSSL_ENTER("wolfSSL_OBJ_nid2sn");
        for (i = 0; i < WOLFSSL_OBJECT_INFO_SZ; i++, obj_info++) {
            if (obj_info->nid == n) {
                return obj_info->sName;
            }
        }
        WOLFSSL_MSG("SN not found");
        return NULL;
    }

#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
    int wolfSSL_OBJ_sn2nid(const char *sn) {
        WOLFSSL_ENTER("wolfSSL_OBJ_sn2nid");
        if (sn == NULL)
            return NID_undef;
        return wc_OBJ_sn2nid(sn);
    }
#endif


    /* Gets the NID value that corresponds with the ASN1 object.
     *
     * o ASN1 object to get NID of
     *
     * Return NID on success and a negative value on failure
     */
    int wolfSSL_OBJ_obj2nid(const WOLFSSL_ASN1_OBJECT *o)
    {
        word32 oid = 0;
        word32 idx = 0;
        int ret;

        WOLFSSL_ENTER("wolfSSL_OBJ_obj2nid");

        if (o == NULL) {
            return -1;
        }

        #ifdef WOLFSSL_QT
        if (o->grp == oidCertExtType) {
            /* If nid is an unknown extension, return NID_undef */
            if (wolfSSL_OBJ_nid2sn(o->nid) == NULL)
                return NID_undef;
        }
        #endif

        if (o->nid > 0)
            return o->nid;
        if ((ret = GetObjectId(o->obj, &idx, &oid, o->grp, o->objSz)) < 0) {
            if (ret == ASN_OBJECT_ID_E) {
                /* Put ASN object tag in front and try again */
                int len = SetObjectId(o->objSz, NULL) + o->objSz;
                byte* buf = (byte*)XMALLOC(len, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                if (!buf) {
                    WOLFSSL_MSG("malloc error");
                    return -1;
                }
                idx = SetObjectId(o->objSz, buf);
                XMEMCPY(buf + idx, o->obj, o->objSz);
                idx = 0;
                ret = GetObjectId(buf, &idx, &oid, o->grp, len);
                XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                if (ret < 0) {
                    WOLFSSL_MSG("Issue getting OID of object");
                    return -1;
                }
            }
            else {
                WOLFSSL_MSG("Issue getting OID of object");
                return -1;
            }
        }

        return oid2nid(oid, o->grp);
    }

    /* Returns the long name that corresponds with an ASN1_OBJECT nid value.
     *  n : NID value of ASN1_OBJECT to search */
    const char* wolfSSL_OBJ_nid2ln(int n)
    {
        const WOLFSSL_ObjectInfo *obj_info = wolfssl_object_info;
        size_t i;
        WOLFSSL_ENTER("wolfSSL_OBJ_nid2ln");
        for (i = 0; i < WOLFSSL_OBJECT_INFO_SZ; i++, obj_info++) {
            if (obj_info->nid == n) {
                return obj_info->lName;
            }
        }
        WOLFSSL_MSG("NID not found in table");
        return NULL;
    }

    /* Return the corresponding NID for the long name <ln>
     * or NID_undef if NID can't be found.
     */
    int wolfSSL_OBJ_ln2nid(const char *ln)
    {
        const WOLFSSL_ObjectInfo *obj_info = wolfssl_object_info;
        size_t i, lnlen;
        WOLFSSL_ENTER("wolfSSL_OBJ_ln2nid");
        if (ln && (lnlen = XSTRLEN(ln)) > 0) {
            /* Accept input like "/commonName=" */
            if (ln[0] == '/') {
                ln++;
                lnlen--;
            }
            if (lnlen) {
                if (ln[lnlen-1] == '=') {
                    lnlen--;
                }
                for (i = 0; i < WOLFSSL_OBJECT_INFO_SZ; i++, obj_info++) {
                    if (lnlen == XSTRLEN(obj_info->lName) &&
                            XSTRNCMP(ln, obj_info->lName, lnlen) == 0) {
                        return obj_info->nid;
                    }
                }
            }
        }
        return NID_undef;
    }

    /* compares two objects, return 0 if equal */
    int wolfSSL_OBJ_cmp(const WOLFSSL_ASN1_OBJECT* a,
                        const WOLFSSL_ASN1_OBJECT* b)
    {
        WOLFSSL_ENTER("wolfSSL_OBJ_cmp");

        if (a && b && a->obj && b->obj) {
            if (a->objSz == b->objSz) {
                return XMEMCMP(a->obj, b->obj, a->objSz);
            }
            else if (a->type == EXT_KEY_USAGE_OID ||
                     b->type == EXT_KEY_USAGE_OID) {
                /* Special case for EXT_KEY_USAGE_OID so that
                 * cmp will be treated as a substring search */
                /* Used in libest to check for id-kp-cmcRA in
                 * EXT_KEY_USAGE extension */
                unsigned int idx;
                const byte* s; /* shorter */
                unsigned int sLen;
                const byte* l; /* longer */
                unsigned int lLen;
                if (a->objSz > b->objSz) {
                    s = b->obj; sLen = b->objSz;
                    l = a->obj; lLen = a->objSz;
                }
                else {
                    s = a->obj; sLen = a->objSz;
                    l = b->obj; lLen = b->objSz;
                }
                for (idx = 0; idx <= lLen - sLen; idx++) {
                    if (XMEMCMP(l + idx, s, sLen) == 0) {
                        /* Found substring */
                        return 0;
                    }
                }
            }
        }

        return WOLFSSL_FATAL_ERROR;
    }
#endif /* OPENSSL_EXTRA, HAVE_LIGHTY, WOLFSSL_MYSQL_COMPATIBLE, HAVE_STUNNEL,
          WOLFSSL_NGINX, HAVE_POCO_LIB, WOLFSSL_HAPROXY */
#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL) || \
    defined(HAVE_LIGHTY) || defined(WOLFSSL_MYSQL_COMPATIBLE) || \
    defined(HAVE_STUNNEL) || defined(WOLFSSL_NGINX) || \
    defined(HAVE_POCO_LIB) || defined(WOLFSSL_HAPROXY)
    /* Gets the NID value that is related to the OID string passed in. Example
     * string would be "2.5.29.14" for subject key ID.
     *
     * returns NID value on success and NID_undef on error
     */
    int wolfSSL_OBJ_txt2nid(const char* s)
    {
        unsigned int i;
    #ifdef WOLFSSL_CERT_EXT
        int ret;
        unsigned int sum = 0;
        unsigned int outSz = MAX_OID_SZ;
        unsigned char out[MAX_OID_SZ];
    #endif

        WOLFSSL_ENTER("OBJ_txt2nid");

        if (s == NULL) {
            return NID_undef;
        }

    #ifdef WOLFSSL_CERT_EXT
        ret = EncodePolicyOID(out, &outSz, s, NULL);
        if (ret == 0) {
            /* sum OID */
            for (i = 0; i < outSz; i++) {
                sum += out[i];
            }
        }
    #endif /* WOLFSSL_CERT_EXT */

        /* get the group that the OID's sum is in
         * @TODO possible conflict with multiples */
        for (i = 0; i < WOLFSSL_OBJECT_INFO_SZ; i++) {
            int len;
        #ifdef WOLFSSL_CERT_EXT
            if (ret == 0) {
                if (wolfssl_object_info[i].id == (int)sum) {
                    return wolfssl_object_info[i].nid;
                }
            }
        #endif

            /* try as a short name */
            len = (int)XSTRLEN(s);
            if ((int)XSTRLEN(wolfssl_object_info[i].sName) == len &&
                XSTRNCMP(wolfssl_object_info[i].sName, s, len) == 0) {
                return wolfssl_object_info[i].nid;
            }

            /* try as a long name */
            if ((int)XSTRLEN(wolfssl_object_info[i].lName) == len &&
                XSTRNCMP(wolfssl_object_info[i].lName, s, len) == 0) {
                return wolfssl_object_info[i].nid;
            }
        }

        return NID_undef;
    }
#endif
#if defined(OPENSSL_EXTRA) || defined(HAVE_LIGHTY) || \
    defined(WOLFSSL_MYSQL_COMPATIBLE) || defined(HAVE_STUNNEL) || \
    defined(WOLFSSL_NGINX) || defined(HAVE_POCO_LIB) || \
    defined(WOLFSSL_HAPROXY)

    /* Creates new ASN1_OBJECT from short name, long name, or text
     * representation of oid. If no_name is 0, then short name, long name, and
     * numerical value of oid are interpreted. If no_name is 1, then only the
     * numerical value of the oid is interpreted.
     *
     * Returns pointer to ASN1_OBJECT on success, or NULL on error.
     */
#if defined(WOLFSSL_CERT_EXT) && defined(WOLFSSL_CERT_GEN)
    WOLFSSL_ASN1_OBJECT* wolfSSL_OBJ_txt2obj(const char* s, int no_name)
    {
        int len, i, ret;
        int nid = NID_undef;
        unsigned int outSz = MAX_OID_SZ;
        unsigned char out[MAX_OID_SZ];
        WOLFSSL_ASN1_OBJECT* obj;

        WOLFSSL_ENTER("wolfSSL_OBJ_txt2obj");

        if (s == NULL)
            return NULL;

        /* If s is numerical value, try to sum oid */
        ret = EncodePolicyOID(out, &outSz, s, NULL);
        if (ret == 0 && outSz > 0) {
            /* If numerical encode succeeded then just
             * create object from that because sums are
             * not unique and can cause confusion. */
            obj = wolfSSL_ASN1_OBJECT_new();
            if (obj == NULL) {
                WOLFSSL_MSG("Issue creating WOLFSSL_ASN1_OBJECT struct");
                return NULL;
            }
            obj->dynamic |= WOLFSSL_ASN1_DYNAMIC;
            obj->obj = (byte*)XMALLOC(1 + MAX_LENGTH_SZ + outSz, NULL,
                    DYNAMIC_TYPE_ASN1);
            if (obj->obj == NULL) {
                wolfSSL_ASN1_OBJECT_free(obj);
                return NULL;
            }
            obj->dynamic |= WOLFSSL_ASN1_DYNAMIC_DATA ;
            i = SetObjectId(outSz, (byte*)obj->obj);
            XMEMCPY((byte*)obj->obj + i, out, outSz);
            obj->objSz = i + outSz;
            return obj;
        }

        len = (int)XSTRLEN(s);

        /* TODO: update short names in wolfssl_object_info and check OID sums
           are correct */
        for (i = 0; i < (int)WOLFSSL_OBJECT_INFO_SZ; i++) {
            /* Short name, long name, and numerical value are interpreted */
            if (no_name == 0 && ((XSTRNCMP(s, wolfssl_object_info[i].sName, len) == 0) ||
                                 (XSTRNCMP(s, wolfssl_object_info[i].lName, len) == 0)))
                    nid = wolfssl_object_info[i].nid;
        }

        if (nid != NID_undef)
            return wolfSSL_OBJ_nid2obj(nid);

        return NULL;
    }
#endif

    /* compatibility function. Its intended use is to remove OID's from an
     * internal table that have been added with OBJ_create. wolfSSL manages its
     * own internal OID values and does not currently support OBJ_create. */
    void wolfSSL_OBJ_cleanup(void)
    {
        WOLFSSL_ENTER("wolfSSL_OBJ_cleanup()");
    }

    #ifndef NO_WOLFSSL_STUB
    int wolfSSL_OBJ_create(const char *oid, const char *sn, const char *ln)
    {
        (void)oid;
        (void)sn;
        (void)ln;
        WOLFSSL_STUB("wolfSSL_OBJ_create");
        return WOLFSSL_FAILURE;
    }
    #endif

    void wolfSSL_set_verify_depth(WOLFSSL *ssl, int depth)
    {
    #if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
        WOLFSSL_ENTER("wolfSSL_set_verify_depth");
        ssl->options.verifyDepth = (byte)depth;
    #endif
    }

#endif /* OPENSSL_ALL || HAVE_LIGHTY || WOLFSSL_MYSQL_COMPATIBLE ||
    HAVE_STUNNEL || WOLFSSL_NGINX || HAVE_POCO_LIB || WOLFSSL_HAPROXY */
#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL) || \
    defined(HAVE_LIGHTY) || defined(WOLFSSL_MYSQL_COMPATIBLE) || \
    defined(HAVE_STUNNEL) || defined(WOLFSSL_NGINX) || \
    defined(HAVE_POCO_LIB) || defined(WOLFSSL_HAPROXY)
    WOLFSSL_ASN1_OBJECT * wolfSSL_X509_NAME_ENTRY_get_object(WOLFSSL_X509_NAME_ENTRY *ne)
    {
        WOLFSSL_ASN1_OBJECT* obj = NULL;

        WOLFSSL_ENTER("wolfSSL_X509_NAME_ENTRY_get_object");
        if (ne == NULL) return NULL;
        obj = wolfSSL_OBJ_nid2obj_ex(ne->nid, ne->object);
        if (obj != NULL) {
            obj->nid = ne->nid;
            return obj;
        }
        return NULL;
    }


#endif /* OPENSSL_ALL || HAVE_LIGHTY || WOLFSSL_MYSQL_COMPATIBLE ||
    HAVE_STUNNEL || WOLFSSL_NGINX || HAVE_POCO_LIB || WOLFSSL_HAPROXY */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL) || \
    defined(OPENSSL_EXTRA_X509_SMALL)

    /* returns a pointer to the internal entry at location 'loc' on success,
     * a null pointer is returned in fail cases */
    WOLFSSL_X509_NAME_ENTRY *wolfSSL_X509_NAME_get_entry(
                                             WOLFSSL_X509_NAME *name, int loc)
    {
        WOLFSSL_ENTER("wolfSSL_X509_NAME_get_entry");

        if (name == NULL) {
            return NULL;
        }

        if (loc < 0 || loc >= MAX_NAME_ENTRIES) {
            WOLFSSL_MSG("Bad argument");
            return NULL;
        }

        if (name->entry[loc].set) {
            return &name->entry[loc];
        }
        else {
            return NULL;
        }
    }
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#ifdef OPENSSL_EXTRA

    int wolfSSL_X509_check_private_key(WOLFSSL_X509 *x509, WOLFSSL_EVP_PKEY *key)
    {
        WOLFSSL_ENTER("wolfSSL_X509_check_private_key");

        if (!x509 || !key) {
            WOLFSSL_MSG("Bad parameter");
            return WOLFSSL_FAILURE;
        }

        return wc_CheckPrivateKey((byte*)key->pkey.ptr, key->pkey_sz,
                x509->pubKey.buffer, x509->pubKey.length,
                (enum Key_Sum)x509->pubKeyOID) == 1 ?
                        WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
    }

/* wolfSSL uses negative values for error states. This function returns an
 * unsigned type so the value returned is the absolute value of the error.
 */
unsigned long wolfSSL_ERR_peek_last_error_line(const char **file, int *line)
{
    WOLFSSL_ENTER("wolfSSL_ERR_peek_last_error");

    (void)line;
    (void)file;
#if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) || defined(DEBUG_WOLFSSL) || \
    defined(WOLFSSL_HAPROXY)
    {
        int ret;

        if ((ret = wc_PeekErrorNode(-1, file, NULL, line)) < 0) {
            WOLFSSL_MSG("Issue peeking at error node in queue");
            return 0;
        }
    #if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX)
        if (ret == -ASN_NO_PEM_HEADER)
            return (ERR_LIB_PEM << 24) | PEM_R_NO_START_LINE;
    #endif
        return (unsigned long)ret;
    }
#else
    return (unsigned long)(0 - NOT_COMPILED_IN);
#endif
}


#ifndef NO_CERTS
int wolfSSL_CTX_use_PrivateKey(WOLFSSL_CTX *ctx, WOLFSSL_EVP_PKEY *pkey)
{
    WOLFSSL_ENTER("wolfSSL_CTX_use_PrivateKey");

    if (ctx == NULL || pkey == NULL) {
        return WOLFSSL_FAILURE;
    }

    if (pkey->pkey.ptr != NULL) {
        /* ptr for WOLFSSL_EVP_PKEY struct is expected to be DER format */
        return wolfSSL_CTX_use_PrivateKey_buffer(ctx,
                                       (const unsigned char*)pkey->pkey.ptr,
                                       pkey->pkey_sz, SSL_FILETYPE_ASN1);
    }

    WOLFSSL_MSG("wolfSSL private key not set");
    return BAD_FUNC_ARG;
}
#endif /* !NO_CERTS */

#endif /* OPENSSL_EXTRA */

#if defined(HAVE_EX_DATA) && \
   (defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) || \
    defined(WOLFSSL_HAPROXY) || defined(OPENSSL_EXTRA) || \
    defined(HAVE_LIGHTY)) || defined(HAVE_EX_DATA) || defined(FORTRESS) || \
    defined(WOLFSSL_WPAS_SMALL)
/**
 * get_ex_new_index is a helper function for the following
 * xx_get_ex_new_index functions:
 *  - wolfSSL_CRYPTO_get_ex_new_index
 *  - wolfSSL_CTX_get_ex_new_index
 *  - wolfSSL_get_ex_new_index
 * Issues a unique index number for the specified class-index.
 * Returns an index number greater or equal to zero on success,
 * -1 on failure.
 */
static int get_ex_new_index(int class_index)
{
    /* index counter for each class index*/
    static int ctx_idx = 0;
    static int ssl_idx = 0;
    static int x509_idx = 0;

    int index = -1;

    switch(class_index) {
        case CRYPTO_EX_INDEX_SSL:
            index = ssl_idx++;
            break;
        case CRYPTO_EX_INDEX_SSL_CTX:
            index = ctx_idx++;
            break;
        case CRYPTO_EX_INDEX_X509:
            index = x509_idx++;
            break;

        /* following class indexes are not supoprted */
        case CRYPTO_EX_INDEX_SSL_SESSION:
        case CRYPTO_EX_INDEX_X509_STORE:
        case CRYPTO_EX_INDEX_X509_STORE_CTX:
        case CRYPTO_EX_INDEX_DH:
        case CRYPTO_EX_INDEX_DSA:
        case CRYPTO_EX_INDEX_EC_KEY:
        case CRYPTO_EX_INDEX_RSA:
        case CRYPTO_EX_INDEX_ENGINE:
        case CRYPTO_EX_INDEX_UI:
        case CRYPTO_EX_INDEX_BIO:
        case CRYPTO_EX_INDEX_APP:
        case CRYPTO_EX_INDEX_UI_METHOD:
        case CRYPTO_EX_INDEX_DRBG:
        default:
            break;
    }
    return index;
}
#endif /* HAVE_EX_DATA || FORTRESS || WOLFSSL_WPAS_SMALL */

#if defined(HAVE_EX_DATA) || defined(FORTRESS) || defined(WOLFSSL_WPAS_SMALL)
void* wolfSSL_CTX_get_ex_data(const WOLFSSL_CTX* ctx, int idx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_get_ex_data");
#ifdef HAVE_EX_DATA
    if(ctx != NULL) {
        return wolfSSL_CRYPTO_get_ex_data(&ctx->ex_data, idx);
    }
#else
    (void)ctx;
    (void)idx;
#endif
    return NULL;
}

int wolfSSL_CTX_get_ex_new_index(long idx, void* arg, void* a, void* b,
                                void* c)
{

    WOLFSSL_ENTER("wolfSSL_CTX_get_ex_new_index");
    (void)idx;
    (void)arg;
    (void)a;
    (void)b;
    (void)c;

    return get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX);
}

/* Return the index that can be used for the WOLFSSL structure to store
 * application data.
 *
 */
int wolfSSL_get_ex_new_index(long argValue, void* arg,
        WOLFSSL_CRYPTO_EX_new* cb1, WOLFSSL_CRYPTO_EX_dup* cb2,
        WOLFSSL_CRYPTO_EX_free* cb3)
{

    WOLFSSL_ENTER("wolfSSL_get_ex_new_index");

    (void)argValue;
    (void)arg;
    (void)cb1;
    (void)cb2;
    (void)cb3;

    return get_ex_new_index(CRYPTO_EX_INDEX_SSL);
}


int wolfSSL_CTX_set_ex_data(WOLFSSL_CTX* ctx, int idx, void* data)
{
    WOLFSSL_ENTER("wolfSSL_CTX_set_ex_data");
    #ifdef HAVE_EX_DATA
    if (ctx != NULL)
    {
        return wolfSSL_CRYPTO_set_ex_data(&ctx->ex_data, idx, data);
    }
    #else
    (void)ctx;
    (void)idx;
    (void)data;
    #endif
    return WOLFSSL_FAILURE;
}

#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
int wolfSSL_CTX_set_ex_data_with_cleanup(
    WOLFSSL_CTX* ctx,
    int idx,
    void* data,
    wolfSSL_ex_data_cleanup_routine_t cleanup_routine)
{
    WOLFSSL_ENTER("wolfSSL_CTX_set_ex_data_with_cleanup");
    if (ctx != NULL)
    {
        return wolfSSL_CRYPTO_set_ex_data_with_cleanup(&ctx->ex_data, idx, data,
                                                       cleanup_routine);
    }
    return WOLFSSL_FAILURE;
}
#endif /* HAVE_EX_DATA_CLEANUP_HOOKS */

#endif /* defined(HAVE_EX_DATA) || defined(FORTRESS) || defined(WOLFSSL_WPAS_SMALL) */

#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)

/* Returns char* to app data stored in ex[0].
 *
 * ssl WOLFSSL structure to get app data from
 */
void* wolfSSL_get_app_data(const WOLFSSL *ssl)
{
    /* checkout exdata stuff... */
    WOLFSSL_ENTER("wolfSSL_get_app_data");

    return wolfSSL_get_ex_data(ssl, 0);
}


/* Set ex array 0 to have app data
 *
 * ssl WOLFSSL struct to set app data in
 * arg data to be stored
 *
 * Returns WOLFSSL_SUCCESS on success and SSL_FAILURE on failure
 */
int wolfSSL_set_app_data(WOLFSSL *ssl, void* arg) {
    WOLFSSL_ENTER("wolfSSL_set_app_data");

    return wolfSSL_set_ex_data(ssl, 0, arg);
}

#endif /* OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL */

#if defined(HAVE_EX_DATA) || defined(OPENSSL_EXTRA) || \
    defined(OPENSSL_EXTRA_X509_SMALL) || defined(WOLFSSL_WPAS_SMALL)

int wolfSSL_set_ex_data(WOLFSSL* ssl, int idx, void* data)
{
    WOLFSSL_ENTER("wolfSSL_set_ex_data");
#if defined(HAVE_EX_DATA) || defined(FORTRESS)
    if (ssl != NULL)
    {
        return wolfSSL_CRYPTO_set_ex_data(&ssl->ex_data, idx, data);
    }
#else
    WOLFSSL_MSG("HAVE_EX_DATA macro is not defined");
    (void)ssl;
    (void)idx;
    (void)data;
#endif
    return WOLFSSL_FAILURE;
}

#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
int wolfSSL_set_ex_data_with_cleanup(
    WOLFSSL* ssl,
    int idx,
    void* data,
    wolfSSL_ex_data_cleanup_routine_t cleanup_routine)
{
    WOLFSSL_ENTER("wolfSSL_set_ex_data_with_cleanup");
    if (ssl != NULL)
    {
        return wolfSSL_CRYPTO_set_ex_data_with_cleanup(&ssl->ex_data, idx, data,
                                                       cleanup_routine);
    }
    return WOLFSSL_FAILURE;
}
#endif /* HAVE_EX_DATA_CLEANUP_HOOKS */

void* wolfSSL_get_ex_data(const WOLFSSL* ssl, int idx)
{
    WOLFSSL_ENTER("wolfSSL_get_ex_data");
#if defined(HAVE_EX_DATA) || defined(FORTRESS)
    if (ssl != NULL) {
        return wolfSSL_CRYPTO_get_ex_data(&ssl->ex_data, idx);
    }
#else
    WOLFSSL_MSG("HAVE_EX_DATA macro is not defined");
    (void)ssl;
    (void)idx;
#endif
    return 0;
}

#endif /* OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL || WOLFSSL_WPAS_SMALL */

#ifdef OPENSSL_EXTRA

#ifndef NO_DSA
#ifndef NO_BIO
WOLFSSL_DSA *wolfSSL_PEM_read_bio_DSAparams(WOLFSSL_BIO *bp, WOLFSSL_DSA **x,
        pem_password_cb *cb, void *u)
{
    WOLFSSL_DSA* dsa;
    DsaKey* key;
    int    length;
    unsigned char*  buf;
    word32 bufSz;
    int ret;
    word32 idx = 0;
    DerBuffer* pDer;

    WOLFSSL_ENTER("wolfSSL_PEM_read_bio_DSAparams");

    ret = wolfSSL_BIO_get_mem_data(bp, &buf);
    if (ret <= 0) {
        WOLFSSL_LEAVE("wolfSSL_PEM_read_bio_DSAparams", ret);
        return NULL;
    }

    bufSz = (word32)ret;

    if (cb != NULL || u != NULL) {
        /*
         * cb is for a call back when encountering encrypted PEM files
         * if cb == NULL and u != NULL then u = null terminated password string
         */
        WOLFSSL_MSG("Not yet supporting call back or password for encrypted PEM");
    }

    if (PemToDer(buf, (long)bufSz, DSA_PARAM_TYPE, &pDer, NULL, NULL,
                    NULL) < 0 ) {
        WOLFSSL_MSG("Issue converting from PEM to DER");
        return NULL;
    }

    if (GetSequence(pDer->buffer, &idx, &length, pDer->length) < 0) {
        WOLFSSL_LEAVE("wolfSSL_PEM_read_bio_DSAparams", ret);
        FreeDer(&pDer);
        return NULL;
    }

    dsa = wolfSSL_DSA_new();
    if (dsa == NULL) {
        FreeDer(&pDer);
        WOLFSSL_MSG("Error creating DSA struct");
        return NULL;
    }

    key = (DsaKey*)dsa->internal;
    if (key == NULL) {
        FreeDer(&pDer);
        wolfSSL_DSA_free(dsa);
        WOLFSSL_MSG("Error finding DSA key struct");
        return NULL;
    }

    if (GetInt(&key->p,  pDer->buffer, &idx, pDer->length) < 0 ||
        GetInt(&key->q,  pDer->buffer, &idx, pDer->length) < 0 ||
        GetInt(&key->g,  pDer->buffer, &idx, pDer->length) < 0 ) {
        WOLFSSL_MSG("dsa key error");
        FreeDer(&pDer);
        wolfSSL_DSA_free(dsa);
        return NULL;
    }

    if (SetIndividualExternal(&dsa->p, &key->p) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("dsa p key error");
        FreeDer(&pDer);
        wolfSSL_DSA_free(dsa);
        return NULL;
    }

    if (SetIndividualExternal(&dsa->q, &key->q) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("dsa q key error");
        FreeDer(&pDer);
        wolfSSL_DSA_free(dsa);
        return NULL;
    }

    if (SetIndividualExternal(&dsa->g, &key->g) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("dsa g key error");
        FreeDer(&pDer);
        wolfSSL_DSA_free(dsa);
        return NULL;
    }

    if (x != NULL) {
        *x = dsa;
    }

    FreeDer(&pDer);
    return dsa;
}
#endif /* !NO_BIO */
#endif /* NO_DSA */
#endif /* OPENSSL_EXTRA */

#if defined(HAVE_LIGHTY) || defined(HAVE_STUNNEL) \
    || defined(WOLFSSL_MYSQL_COMPATIBLE) || defined(OPENSSL_EXTRA)

#ifndef NO_BIO
WOLFSSL_BIO *wolfSSL_BIO_new_file(const char *filename, const char *mode)
{
#ifndef NO_FILESYSTEM
    WOLFSSL_BIO* bio;
    XFILE fp;

    WOLFSSL_ENTER("wolfSSL_BIO_new_file");

    fp = XFOPEN(filename, mode);
    if (fp == XBADFILE)
        return NULL;

    bio = wolfSSL_BIO_new(wolfSSL_BIO_s_file());
    if (bio == NULL) {
        XFCLOSE(fp);
        return bio;
    }

    if (wolfSSL_BIO_set_fp(bio, fp, BIO_CLOSE) != WOLFSSL_SUCCESS) {
        XFCLOSE(fp);
        wolfSSL_BIO_free(bio);
        bio = NULL;
    }

    /* file is closed when BIO is free'd */
    return bio;
#else
    (void)filename;
    (void)mode;
    return NULL;
#endif /* NO_FILESYSTEM */
}

#ifndef NO_FILESYSTEM
WOLFSSL_BIO* wolfSSL_BIO_new_fp(XFILE fp, int close_flag)
{
    WOLFSSL_BIO* bio;

    WOLFSSL_ENTER("wolfSSL_BIO_new_fp");

    bio = wolfSSL_BIO_new(wolfSSL_BIO_s_file());
    if (bio == NULL) {
        return bio;
    }

    if (wolfSSL_BIO_set_fp(bio, fp, close_flag) != WOLFSSL_SUCCESS) {
        wolfSSL_BIO_free(bio);
        bio = NULL;
    }

    /* file is closed when BIO is free'd or by user depending on flag */
    return bio;
}
#endif
#endif /* !NO_BIO */


#ifndef NO_DH
#ifndef NO_BIO
WOLFSSL_DH *wolfSSL_PEM_read_bio_DHparams(WOLFSSL_BIO *bio, WOLFSSL_DH **x,
        pem_password_cb *cb, void *u)
{
#ifndef NO_FILESYSTEM
    WOLFSSL_DH* localDh = NULL;
    unsigned char* mem  = NULL;
    word32 size;
    long   sz;
    int    ret;
    DerBuffer *der = NULL;
    byte*  p = NULL;
    byte*  g = NULL;
    word32 pSz = MAX_DH_SIZE;
    word32 gSz = MAX_DH_SIZE;
    int    memAlloced = 0;

    WOLFSSL_ENTER("wolfSSL_PEM_read_bio_DHparams");
    (void)cb;
    (void)u;

    if (bio == NULL) {
        WOLFSSL_MSG("Bad Function Argument bio is NULL");
        return NULL;
    }

    if (bio->type == WOLFSSL_BIO_MEMORY) {
        /* Use the buffer directly. */
        ret = wolfSSL_BIO_get_mem_data(bio, &mem);
        if (mem == NULL || ret <= 0) {
            WOLFSSL_MSG("Failed to get data from bio struct");
            goto end;
        }
        size = ret;
    }
    else if (bio->type == WOLFSSL_BIO_FILE) {
        /* Read whole file into a new buffer. */
        if (XFSEEK((XFILE)bio->ptr, 0, SEEK_END) != 0)
            goto end;
        sz = XFTELL((XFILE)bio->ptr);
        if (XFSEEK((XFILE)bio->ptr, 0, SEEK_SET) != 0)
            goto end;
        if (sz > MAX_WOLFSSL_FILE_SIZE || sz <= 0L) {
            WOLFSSL_MSG("PEM_read_bio_DHparams file size error");
            goto end;
        }
        mem = (unsigned char*)XMALLOC(sz, NULL, DYNAMIC_TYPE_PEM);
        if (mem == NULL)
            goto end;
        memAlloced = 1;

        if (wolfSSL_BIO_read(bio, (char *)mem, (int)sz) <= 0)
            goto end;
        size = (word32)sz;
    }
    else {
        WOLFSSL_MSG("BIO type not supported for reading DH parameters");
        goto end;
    }

    ret = PemToDer(mem, size, DH_PARAM_TYPE, &der, NULL, NULL, NULL);
    if (ret != 0)
        goto end;

    /* Use the object passed in, otherwise allocate a new object */
    if (x != NULL)
        localDh = *x;
    if (localDh == NULL) {
        localDh = wolfSSL_DH_new();
        if (localDh == NULL)
            goto end;
    }

    /* Load data in manually */
    p = (byte*)XMALLOC(pSz, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
    g = (byte*)XMALLOC(gSz, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
    if (p == NULL || g == NULL)
        goto end;

    /* Extract the p and g as data from the DER encoded DH parameters. */
    ret = wc_DhParamsLoad(der->buffer, der->length, p, &pSz, g, &gSz);
    if (ret != 0) {
        if (x != NULL && localDh != *x)
            XFREE(localDh, NULL, DYNAMIC_TYPE_OPENSSL);
        localDh = NULL;
        goto end;
    }

    if (x != NULL)
        *x = localDh;

    /* Put p and g in as big numbers. */
    if (localDh->p != NULL) {
        wolfSSL_BN_free(localDh->p);
        localDh->p = NULL;
    }
    if (localDh->g != NULL) {
        wolfSSL_BN_free(localDh->g);
        localDh->g = NULL;
    }
    localDh->p = wolfSSL_BN_bin2bn(p, pSz, NULL);
    localDh->g = wolfSSL_BN_bin2bn(g, gSz, NULL);
    if (localDh->p == NULL || localDh->g == NULL) {
        if (x != NULL && localDh != *x)
            wolfSSL_DH_free(localDh);
        localDh = NULL;
    }

    if (localDh != NULL && localDh->inSet == 0) {
        if (SetDhInternal(localDh) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Unable to set internal DH structure");
            wolfSSL_DH_free(localDh);
            localDh = NULL;
        }
    }

end:
    if (memAlloced) XFREE(mem, NULL, DYNAMIC_TYPE_PEM);
    if (der != NULL) FreeDer(&der);
    XFREE(p, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
    XFREE(g, NULL, DYNAMIC_TYPE_PUBLIC_KEY);
    return localDh;
#else
    (void)bio;
    (void)x;
    (void)cb;
    (void)u;
    return NULL;
#endif
}
#endif /* !NO_BIO */

#if defined(WOLFSSL_DH_EXTRA) && !defined(NO_FILESYSTEM)
/* Writes the DH parameters in PEM format from "dh" out to the file pointer
 * passed in.
 *
 * returns WOLFSSL_SUCCESS on success
 */
int wolfSSL_PEM_write_DHparams(XFILE fp, WOLFSSL_DH* dh)
{
    int ret;
    word32 derSz = 0, pemSz = 0;
    byte *der, *pem;
    DhKey* key;

    WOLFSSL_ENTER("wolfSSL_PEM_write_DHparams");

    if (dh == NULL) {
        WOLFSSL_LEAVE("wolfSSL_PEM_write_DHparams", BAD_FUNC_ARG);
        return WOLFSSL_FAILURE;
    }

    if (dh->inSet == 0) {
        if (SetDhInternal(dh) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Unable to set internal DH structure");
            return WOLFSSL_FAILURE;
        }
    }
    key = (DhKey*)dh->internal;
    ret = wc_DhParamsToDer(key, NULL, &derSz);
    if (ret != LENGTH_ONLY_E) {
        WOLFSSL_MSG("Failed to get size of DH params");
        WOLFSSL_LEAVE("wolfSSL_PEM_write_DHparams", ret);
        return WOLFSSL_FAILURE;
    }

    der = (byte*)XMALLOC(derSz, key->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (der == NULL) {
        WOLFSSL_LEAVE("wolfSSL_PEM_write_DHparams", MEMORY_E);
        return WOLFSSL_FAILURE;
    }
    ret = wc_DhParamsToDer(key, der, &derSz);
    if (ret <= 0) {
        WOLFSSL_MSG("Failed to export DH params");
        WOLFSSL_LEAVE("wolfSSL_PEM_write_DHparams", ret);
        XFREE(der, key->heap, DYNAMIC_TYPE_TMP_BUFFER);
        return WOLFSSL_FAILURE;
    }

    /* convert to PEM */
    ret = wc_DerToPem(der, derSz, NULL, 0, DH_PARAM_TYPE);
    if (ret < 0) {
        WOLFSSL_MSG("Failed to convert DH params to PEM");
        WOLFSSL_LEAVE("wolfSSL_PEM_write_DHparams", ret);
        XFREE(der, key->heap, DYNAMIC_TYPE_TMP_BUFFER);
        return ret;
    }
    pemSz = (word32)ret;

    pem = (byte*)XMALLOC(pemSz, key->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (pem == NULL) {
        WOLFSSL_LEAVE("wolfSSL_PEM_write_DHparams", MEMORY_E);
        XFREE(der, key->heap, DYNAMIC_TYPE_TMP_BUFFER);
        return ret;
    }
    ret = wc_DerToPem(der, derSz, pem, pemSz, DH_PARAM_TYPE);
    XFREE(der, key->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (ret < 0) {
        WOLFSSL_MSG("Failed to convert DH params to PEM");
        WOLFSSL_LEAVE("wolfSSL_PEM_write_DHparams", ret);
        XFREE(pem, key->heap, DYNAMIC_TYPE_TMP_BUFFER);
        return ret;
    }

    ret = (int)XFWRITE(pem, 1, pemSz, fp);
    XFREE(pem, key->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (ret <= 0) {
        WOLFSSL_MSG("Failed to write to file");
        WOLFSSL_LEAVE("wolfSSL_PEM_write_DHparams", ret);
        return WOLFSSL_FAILURE;
    }

    WOLFSSL_LEAVE("wolfSSL_PEM_write_DHparams", WOLFSSL_SUCCESS);
    return WOLFSSL_SUCCESS;
}
#endif /* WOLFSSL_DH_EXTRA && !NO_FILESYSTEM */
#endif /* !NO_DH */

#ifndef NO_BIO

#ifdef WOLFSSL_CERT_GEN

#ifdef WOLFSSL_CERT_REQ
/* writes the x509 from x to the WOLFSSL_BIO bp
 *
 * returns WOLFSSL_SUCCESS on success and WOLFSSL_FAILURE on fail
 */
int wolfSSL_PEM_write_bio_X509_REQ(WOLFSSL_BIO *bp, WOLFSSL_X509 *x)
{
    byte* pem;
    int   pemSz = 0;
    const unsigned char* der;
    int derSz;
    int ret;

    WOLFSSL_ENTER("wolfSSL_PEM_write_bio_X509_REQ()");

    if (x == NULL || bp == NULL) {
        return WOLFSSL_FAILURE;
    }

    der = wolfSSL_X509_get_der(x, &derSz);
    if (der == NULL) {
        return WOLFSSL_FAILURE;
    }

    /* get PEM size */
    pemSz = wc_DerToPemEx(der, derSz, NULL, 0, NULL, CERTREQ_TYPE);
    if (pemSz < 0) {
        return WOLFSSL_FAILURE;
    }

    /* create PEM buffer and convert from DER */
    pem = (byte*)XMALLOC(pemSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (pem == NULL) {
        return WOLFSSL_FAILURE;
    }
    if (wc_DerToPemEx(der, derSz, pem, pemSz, NULL, CERTREQ_TYPE) < 0) {
        XFREE(pem, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        return WOLFSSL_FAILURE;
    }

    /* write the PEM to BIO */
    ret = wolfSSL_BIO_write(bp, pem, pemSz);
    XFREE(pem, NULL, DYNAMIC_TYPE_TMP_BUFFER);

    if (ret <= 0) return WOLFSSL_FAILURE;
    return WOLFSSL_SUCCESS;
}
#endif /* WOLFSSL_CERT_REQ */


/* writes the x509 from x to the WOLFSSL_BIO bp
 *
 * returns WOLFSSL_SUCCESS on success and WOLFSSL_FAILURE on fail
 */
int wolfSSL_PEM_write_bio_X509_AUX(WOLFSSL_BIO *bp, WOLFSSL_X509 *x)
{
    byte* pem;
    int   pemSz = 0;
    const unsigned char* der;
    int derSz;
    int ret;

    WOLFSSL_ENTER("wolfSSL_PEM_write_bio_X509_AUX()");

    if (bp == NULL || x == NULL) {
        WOLFSSL_MSG("NULL argument passed in");
        return WOLFSSL_FAILURE;
    }

    der = wolfSSL_X509_get_der(x, &derSz);
    if (der == NULL) {
        return WOLFSSL_FAILURE;
    }

    /* get PEM size */
    pemSz = wc_DerToPemEx(der, derSz, NULL, 0, NULL, CERT_TYPE);
    if (pemSz < 0) {
        return WOLFSSL_FAILURE;
    }

    /* create PEM buffer and convert from DER */
    pem = (byte*)XMALLOC(pemSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (pem == NULL) {
        return WOLFSSL_FAILURE;
    }
    if (wc_DerToPemEx(der, derSz, pem, pemSz, NULL, CERT_TYPE) < 0) {
        XFREE(pem, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        return WOLFSSL_FAILURE;
    }

    /* write the PEM to BIO */
    ret = wolfSSL_BIO_write(bp, pem, pemSz);
    XFREE(pem, NULL, DYNAMIC_TYPE_TMP_BUFFER);

    if (ret <= 0) return WOLFSSL_FAILURE;
    return WOLFSSL_SUCCESS;
}

int wolfSSL_PEM_write_bio_X509(WOLFSSL_BIO *bio, WOLFSSL_X509 *cert)
{
    byte* pem = NULL;
    int   pemSz = 0;
    /* Get large buffer to hold cert der */
    int derSz = X509_BUFFER_SZ;
#ifdef WOLFSSL_SMALL_STACK
    byte* der;
#else
    byte der[X509_BUFFER_SZ];
#endif
    int ret;

    WOLFSSL_ENTER("wolfSSL_PEM_write_bio_X509_AUX()");

    if (bio == NULL || cert == NULL) {
        WOLFSSL_MSG("NULL argument passed in");
        return WOLFSSL_FAILURE;
    }

#ifdef WOLFSSL_SMALL_STACK
    der = (byte*)XMALLOC(derSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (!der) {
        WOLFSSL_MSG("malloc failed");
        return WOLFSSL_FAILURE;
    }
#endif

    if (wolfssl_x509_make_der(cert, 0, der, &derSz, 1) != WOLFSSL_SUCCESS) {
        goto error;
    }

    /* get PEM size */
    pemSz = wc_DerToPemEx(der, derSz, NULL, 0, NULL, CERT_TYPE);
    if (pemSz < 0) {
        goto error;
    }

    /* create PEM buffer and convert from DER */
    pem = (byte*)XMALLOC(pemSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (pem == NULL) {
        goto error;
    }
    if (wc_DerToPemEx(der, derSz, pem, pemSz, NULL, CERT_TYPE) < 0) {
        goto error;
    }

    /* write the PEM to BIO */
    ret = wolfSSL_BIO_write(bio, pem, pemSz);
    XFREE(pem, NULL, DYNAMIC_TYPE_TMP_BUFFER);

    if (ret <= 0) return WOLFSSL_FAILURE;
    return WOLFSSL_SUCCESS;

error:
    #ifdef WOLFSSL_SMALL_STACK
    XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    #endif
    if (pem)
        XFREE(pem, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    return WOLFSSL_FAILURE;
}
#endif /* WOLFSSL_CERT_GEN */

#endif /* !NO_BIO */

#if defined(OPENSSL_EXTRA) && !defined(NO_DH)
/* Initialize ctx->dh with dh's params. Return WOLFSSL_SUCCESS on ok */
long wolfSSL_CTX_set_tmp_dh(WOLFSSL_CTX* ctx, WOLFSSL_DH* dh)
{
    int pSz, gSz;
    byte *p, *g;
    int ret=0;

    WOLFSSL_ENTER("wolfSSL_CTX_set_tmp_dh");

    if(!ctx || !dh)
        return BAD_FUNC_ARG;

    /* Get needed size for p and g */
    pSz = wolfSSL_BN_bn2bin(dh->p, NULL);
    gSz = wolfSSL_BN_bn2bin(dh->g, NULL);

    if(pSz <= 0 || gSz <= 0)
        return WOLFSSL_FATAL_ERROR;

    p = (byte*)XMALLOC(pSz, ctx->heap, DYNAMIC_TYPE_PUBLIC_KEY);
    if(!p)
        return MEMORY_E;

    g = (byte*)XMALLOC(gSz, ctx->heap, DYNAMIC_TYPE_PUBLIC_KEY);
    if(!g) {
        XFREE(p, ctx->heap, DYNAMIC_TYPE_PUBLIC_KEY);
        return MEMORY_E;
    }

    pSz = wolfSSL_BN_bn2bin(dh->p, p);
    gSz = wolfSSL_BN_bn2bin(dh->g, g);

    if(pSz >= 0 && gSz >= 0) /* Conversion successful */
        ret = wolfSSL_CTX_SetTmpDH(ctx, p, pSz, g, gSz);

    XFREE(p, ctx->heap, DYNAMIC_TYPE_PUBLIC_KEY);
    XFREE(g, ctx->heap, DYNAMIC_TYPE_PUBLIC_KEY);

    return pSz > 0 && gSz > 0 ? ret : WOLFSSL_FATAL_ERROR;
}
#endif /* OPENSSL_EXTRA && !NO_DH */


/* returns the enum value associated with handshake state
 *
 * ssl the WOLFSSL structure to get state of
 */
int wolfSSL_get_state(const WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_get_state");

    if (ssl == NULL) {
        WOLFSSL_MSG("Null argument passed in");
        return SSL_FAILURE;
    }

    return ssl->options.handShakeState;
}
#endif /* HAVE_LIGHTY || HAVE_STUNNEL || WOLFSSL_MYSQL_COMPATIBLE */

#if defined(OPENSSL_ALL) || defined(WOLFSSL_ASIO) || defined(WOLFSSL_HAPROXY) \
    || defined(WOLFSSL_NGINX) || defined(WOLFSSL_QT)

long wolfSSL_ctrl(WOLFSSL* ssl, int cmd, long opt, void* pt)
{
    WOLFSSL_ENTER("wolfSSL_ctrl");
    if (ssl == NULL)
        return BAD_FUNC_ARG;

    switch (cmd) {
        #if defined(WOLFSSL_NGINX) || defined(WOLFSSL_QT) || defined(OPENSSL_ALL)
        #ifdef HAVE_SNI
        case SSL_CTRL_SET_TLSEXT_HOSTNAME:
            WOLFSSL_MSG("Entering Case: SSL_CTRL_SET_TLSEXT_HOSTNAME.");
            if (pt == NULL) {
                WOLFSSL_MSG("Passed in NULL Host Name.");
                break;
            }
            return wolfSSL_set_tlsext_host_name(ssl, (const char*) pt);
        #endif /* HAVE_SNI */
        #endif /* WOLFSSL_NGINX || WOLFSSL_QT || OPENSSL_ALL */
        default:
            WOLFSSL_MSG("Case not implemented.");
    }
    (void)opt;
    (void)pt;
    return WOLFSSL_FAILURE;
}

long wolfSSL_CTX_ctrl(WOLFSSL_CTX* ctx, int cmd, long opt, void* pt)
{
#if defined(OPENSSL_EXTRA) || defined(HAVE_WEBSERVER)
    long ctrl_opt;
#endif
    long ret = WOLFSSL_SUCCESS;

    WOLFSSL_ENTER("wolfSSL_CTX_ctrl");
    if (ctx == NULL)
        return WOLFSSL_FAILURE;

    switch (cmd) {
    case SSL_CTRL_CHAIN:
#ifdef SESSION_CERTS
    {
        /*
         * We don't care about opt here because a copy of the certificate is
         * stored anyway so increasing the reference counter is not necessary.
         * Just check to make sure that it is set to one of the correct values.
         */
        WOLF_STACK_OF(WOLFSSL_X509)* sk = (WOLF_STACK_OF(WOLFSSL_X509)*) pt;
        WOLFSSL_X509* x509;
        int i;
        if (opt != 0 && opt != 1) {
            ret = WOLFSSL_FAILURE;
            break;
        }
        /* Clear certificate chain */
        FreeDer(&ctx->certChain);
        if (sk) {
            for (i = 0; i < wolfSSL_sk_X509_num(sk); i++) {
                x509 = wolfSSL_sk_X509_value(sk, i);
                /* Prevent wolfSSL_CTX_add_extra_chain_cert from freeing cert */
                if (wolfSSL_X509_up_ref(x509) != 1) {
                    WOLFSSL_MSG("Error increasing reference count");
                    continue;
                }
                if (wolfSSL_CTX_add_extra_chain_cert(ctx, x509) !=
                        WOLFSSL_SUCCESS) {
                    WOLFSSL_MSG("Error adding certificate to context");
                    /* Decrease reference count on failure */
                    wolfSSL_X509_free(x509);
                }
            }
        }
        /* Free previous chain */
        wolfSSL_sk_X509_free(ctx->x509Chain);
        ctx->x509Chain = sk;
        if (sk && opt == 1) {
            /* up all refs when opt == 1 */
            for (i = 0; i < wolfSSL_sk_X509_num(sk); i++) {
                x509 = wolfSSL_sk_X509_value(sk, i);
                if (wolfSSL_X509_up_ref(x509) != 1) {
                    WOLFSSL_MSG("Error increasing reference count");
                    continue;
                }
            }
        }
    }
#else
        WOLFSSL_MSG("Session certificates not compiled in");
        ret = WOLFSSL_FAILURE;
#endif
        break;

#if defined(OPENSSL_EXTRA) || defined(HAVE_WEBSERVER)
    case SSL_CTRL_OPTIONS:
        WOLFSSL_MSG("Entering Case: SSL_CTRL_OPTIONS.");
        ctrl_opt = wolfSSL_CTX_set_options(ctx, opt);

        #ifdef WOLFSSL_QT
        /* Set whether to use client or server cipher preference */
        if ((ctrl_opt & SSL_OP_CIPHER_SERVER_PREFERENCE)
                     == SSL_OP_CIPHER_SERVER_PREFERENCE) {
            WOLFSSL_MSG("Using Server's Cipher Preference.");
            ctx->useClientOrder = FALSE;
        } else {
            WOLFSSL_MSG("Using Client's Cipher Preference.");
            ctx->useClientOrder = TRUE;
        }
        #endif /* WOLFSSL_QT */

        return ctrl_opt;
#endif /* OPENSSL_EXTRA || HAVE_WEBSERVER */
    case SSL_CTRL_EXTRA_CHAIN_CERT:
        WOLFSSL_MSG("Entering Case: SSL_CTRL_EXTRA_CHAIN_CERT.");
        if (pt == NULL) {
            WOLFSSL_MSG("Passed in x509 pointer NULL.");
            ret = WOLFSSL_FAILURE;
            break;
        }
        return wolfSSL_CTX_add_extra_chain_cert(ctx, (WOLFSSL_X509*)pt);

#ifndef NO_DH
    case SSL_CTRL_SET_TMP_DH:
        WOLFSSL_MSG("Entering Case: SSL_CTRL_SET_TMP_DH.");
        if (pt == NULL) {
            WOLFSSL_MSG("Passed in DH pointer NULL.");
            ret = WOLFSSL_FAILURE;
            break;
        }
        return wolfSSL_CTX_set_tmp_dh(ctx, (WOLFSSL_DH*)pt);
#endif

#ifdef HAVE_ECC
    case SSL_CTRL_SET_TMP_ECDH:
        WOLFSSL_MSG("Entering Case: SSL_CTRL_SET_TMP_ECDH.");
        if (pt == NULL) {
            WOLFSSL_MSG("Passed in ECDH pointer NULL.");
            ret = WOLFSSL_FAILURE;
            break;
        }
        return wolfSSL_SSL_CTX_set_tmp_ecdh(ctx, (WOLFSSL_EC_KEY*)pt);
#endif
    case SSL_CTRL_MODE:
        wolfSSL_CTX_set_mode(ctx,opt);
        break;
    case SSL_CTRL_SET_MIN_PROTO_VERSION:
        WOLFSSL_MSG("set min proto version");
        if (opt == 0) {
            /* do nothing */
            return WOLFSSL_SUCCESS;
        }
        return wolfSSL_CTX_set_min_proto_version(ctx, (int)opt);
    case SSL_CTRL_SET_MAX_PROTO_VERSION:
        WOLFSSL_MSG("set max proto version");
        if (opt == 0) {
            /* do nothing */
            return WOLFSSL_SUCCESS;
        }
        return wolfSSL_CTX_set_max_proto_version(ctx, (int)opt);
    default:
        WOLFSSL_MSG("CTX_ctrl cmd not implemented");
        ret = WOLFSSL_FAILURE;
        break;
    }

    (void)ctx;
    (void)cmd;
    (void)opt;
    (void)pt;
    WOLFSSL_LEAVE("wolfSSL_CTX_ctrl", (int)ret);
    return ret;
}

#ifndef WOLFSSL_NO_STUB
long wolfSSL_CTX_callback_ctrl(WOLFSSL_CTX* ctx, int cmd, void (*fp)(void))
{
    (void) ctx;
    (void) cmd;
    (void) fp;
    WOLFSSL_STUB("wolfSSL_CTX_callback_ctrl");
    return WOLFSSL_FAILURE;

}
#endif /* WOLFSSL_NO_STUB */

#ifndef NO_WOLFSSL_STUB
long wolfSSL_CTX_clear_extra_chain_certs(WOLFSSL_CTX* ctx)
{
    return wolfSSL_CTX_ctrl(ctx, SSL_CTRL_CLEAR_EXTRA_CHAIN_CERTS, 0l, NULL);
}
#endif

/* Returns the verifyCallback from the ssl structure if successful.
Returns NULL otherwise. */
VerifyCallback wolfSSL_get_verify_callback(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_get_verify_callback()");
    if (ssl) {
        return ssl->verifyCallback;
    }
    return NULL;
}

#ifndef NO_BIO

/* Creates a new bio pair.
Returns WOLFSSL_SUCCESS if no error, WOLFSSL_FAILURE otherwise.*/
int wolfSSL_BIO_new_bio_pair(WOLFSSL_BIO **bio1_p, size_t writebuf1,
                                         WOLFSSL_BIO **bio2_p, size_t writebuf2)
{
    WOLFSSL_BIO *bio1 = NULL, *bio2 = NULL;
    int ret = 1;

    WOLFSSL_ENTER("wolfSSL_BIO_new_bio_pair()");

    if (bio1_p == NULL || bio2_p == NULL) {
        WOLFSSL_MSG("Bad Function Argument");
        return BAD_FUNC_ARG;
    }

    /* set up the new bio structures and write buf sizes */
    if ((bio1 = wolfSSL_BIO_new(wolfSSL_BIO_s_bio())) == NULL) {
        WOLFSSL_MSG("Bio allocation failed");
        ret = WOLFSSL_FAILURE;
    }
    if (ret) {
        if ((bio2 = wolfSSL_BIO_new(wolfSSL_BIO_s_bio())) == NULL) {
            WOLFSSL_MSG("Bio allocation failed");
            ret = WOLFSSL_FAILURE;
        }
    }
    if (ret && writebuf1) {
        if (!(ret = wolfSSL_BIO_set_write_buf_size(bio1, (long)writebuf1))) {
            WOLFSSL_MSG("wolfSSL_BIO_set_write_buf() failure");
        }
    }
    if (ret && writebuf2) {
        if (!(ret = wolfSSL_BIO_set_write_buf_size(bio2, (long)writebuf2))) {
            WOLFSSL_MSG("wolfSSL_BIO_set_write_buf() failure");
        }
    }

    if (ret) {
        if ((ret = wolfSSL_BIO_make_bio_pair(bio1, bio2))) {
            *bio1_p = bio1;
            *bio2_p = bio2;
        }
    }
    if (!ret) {
        wolfSSL_BIO_free(bio1);
        bio1 = NULL;
        wolfSSL_BIO_free(bio2);
        bio2 = NULL;
    }
    return ret;
}


#if !defined(HAVE_FAST_RSA) && defined(WOLFSSL_KEY_GEN) && \
    !defined(NO_RSA) && !defined(HAVE_USER_RSA)
/* Converts an rsa key from a bio buffer into an internal rsa structure.
Returns a pointer to the new WOLFSSL_RSA structure. */
WOLFSSL_RSA* wolfSSL_d2i_RSAPrivateKey_bio(WOLFSSL_BIO *bio, WOLFSSL_RSA **out)
{
    const unsigned char* bioMem = NULL;
    int bioMemSz = 0;
    WOLFSSL_RSA* key = NULL;
    unsigned char *maxKeyBuf = NULL;
    unsigned char* bufPtr = NULL;
    unsigned char* extraBioMem = NULL;
    int extraBioMemSz = 0;
    int derLength = 0;
    int j = 0, i = 0;

    WOLFSSL_ENTER("wolfSSL_d2i_RSAPrivateKey_bio()");

    if (bio == NULL) {
        WOLFSSL_MSG("Bad Function Argument");
        return NULL;
    }
    (void)out;

    bioMemSz = wolfSSL_BIO_get_len(bio);
    if (bioMemSz <= 0) {
        WOLFSSL_MSG("wolfSSL_BIO_get_len() failure");
        return NULL;
    }

    bioMem = (unsigned char*)XMALLOC(bioMemSz, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (bioMem == NULL) {
        WOLFSSL_MSG("Malloc failure");
        return NULL;
    }

    maxKeyBuf = (unsigned char*)XMALLOC(4096, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (maxKeyBuf == NULL) {
        WOLFSSL_MSG("Malloc failure");
        XFREE((unsigned char*)bioMem, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
        return NULL;
    }
    bufPtr = maxKeyBuf;
    if (wolfSSL_BIO_read(bio, (unsigned char*)bioMem, (int)bioMemSz) == bioMemSz) {
        const byte* bioMemPt = bioMem; /* leave bioMem pointer unaltered */
        if ((key = wolfSSL_d2i_RSAPrivateKey(NULL, &bioMemPt, bioMemSz)) == NULL) {
            XFREE((unsigned char*)bioMem, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
            XFREE((unsigned char*)maxKeyBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
            return NULL;
        }

        /* This function is used to get the total length of the rsa key. */
        derLength = wolfSSL_i2d_RSAPrivateKey(key, &bufPtr);

        /* Write extra data back into bio object if necessary. */
        extraBioMemSz = (bioMemSz - derLength);
        if (extraBioMemSz > 0) {
            extraBioMem = (unsigned char *)XMALLOC(extraBioMemSz, NULL,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
            if (extraBioMem == NULL) {
                WOLFSSL_MSG("Malloc failure");
                XFREE((unsigned char*)extraBioMem, bio->heap,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
                XFREE((unsigned char*)bioMem, bio->heap,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
                XFREE((unsigned char*)maxKeyBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
                return NULL;
            }

            for (i = derLength; i < bioMemSz; i++) {
                *(extraBioMem + j) = *(bioMem + i);
                j++;
            }

            wolfSSL_BIO_write(bio, extraBioMem, extraBioMemSz);
            if (wolfSSL_BIO_get_len(bio) <= 0) {
                WOLFSSL_MSG("Failed to write memory to bio");
                XFREE((unsigned char*)extraBioMem, bio->heap,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
                XFREE((unsigned char*)bioMem, bio->heap,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
                XFREE((unsigned char*)maxKeyBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
                return NULL;
            }
            XFREE((unsigned char*)extraBioMem, bio->heap,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
        }

        if (out != NULL && key != NULL) {
            *out = key;
        }
    }
    XFREE((unsigned char*)bioMem, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    XFREE((unsigned char*)maxKeyBuf, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    return key;
}
#endif

#endif /* !NO_BIO */


/* Adds the ASN1 certificate to the user ctx.
Returns WOLFSSL_SUCCESS if no error, returns WOLFSSL_FAILURE otherwise.*/
int wolfSSL_CTX_use_certificate_ASN1(WOLFSSL_CTX *ctx, int derSz,
                                                       const unsigned char *der)
{
    WOLFSSL_ENTER("wolfSSL_CTX_use_certificate_ASN1()");
    if (der != NULL && ctx != NULL) {
        if (wolfSSL_CTX_use_certificate_buffer(ctx, der, derSz,
                                      WOLFSSL_FILETYPE_ASN1) == WOLFSSL_SUCCESS) {
            return WOLFSSL_SUCCESS;
        }

    }
    return WOLFSSL_FAILURE;
}


#if !defined(HAVE_FAST_RSA) && defined(WOLFSSL_KEY_GEN) && \
    !defined(NO_RSA) && !defined(HAVE_USER_RSA)
/* Adds the rsa private key to the user ctx.
Returns WOLFSSL_SUCCESS if no error, returns WOLFSSL_FAILURE otherwise.*/
int wolfSSL_CTX_use_RSAPrivateKey(WOLFSSL_CTX* ctx, WOLFSSL_RSA* rsa)
{
    int ret;
    int derSize;
    unsigned char *maxDerBuf;
    unsigned char* key = NULL;

    WOLFSSL_ENTER("wolfSSL_CTX_use_RSAPrivateKey()");

    if (ctx == NULL || rsa == NULL) {
        WOLFSSL_MSG("one or more inputs were NULL");
        return BAD_FUNC_ARG;
    }
    maxDerBuf = (unsigned char*)XMALLOC(4096, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (maxDerBuf == NULL) {
        WOLFSSL_MSG("Malloc failure");
        return MEMORY_E;
    }
    key = maxDerBuf;
    /* convert RSA struct to der encoded buffer and get the size */
    if ((derSize = wolfSSL_i2d_RSAPrivateKey(rsa, &key)) <= 0) {
        WOLFSSL_MSG("wolfSSL_i2d_RSAPrivateKey() failure");
        XFREE(maxDerBuf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        return WOLFSSL_FAILURE;
    }
    ret = wolfSSL_CTX_use_PrivateKey_buffer(ctx, (const unsigned char*)maxDerBuf,
                                                    derSize, SSL_FILETYPE_ASN1);
    if (ret != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("wolfSSL_CTX_USE_PrivateKey_buffer() failure");
        XFREE(maxDerBuf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        return WOLFSSL_FAILURE;
    }
    XFREE(maxDerBuf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    return ret;
}
#endif /* NO_RSA && !HAVE_FAST_RSA */


#ifndef NO_BIO
/* Converts EVP_PKEY data from a bio buffer to a WOLFSSL_EVP_PKEY structure.
Returns pointer to private EVP_PKEY struct upon success, NULL if there
is a failure.*/
WOLFSSL_EVP_PKEY* wolfSSL_d2i_PrivateKey_bio(WOLFSSL_BIO* bio,
                                                         WOLFSSL_EVP_PKEY** out)
{
    unsigned char* mem = NULL;
    int memSz = 0;
    WOLFSSL_EVP_PKEY* key = NULL;
    int i = 0, j = 0;
    unsigned char* extraBioMem = NULL;
    int extraBioMemSz = 0;
    int derLength = 0;

    WOLFSSL_ENTER("wolfSSL_d2i_PrivateKey_bio()");

    if (bio == NULL) {
        return NULL;
    }
    (void)out;

    memSz = wolfSSL_BIO_get_len(bio);
    if (memSz <= 0) {
        WOLFSSL_MSG("wolfSSL_BIO_get_len() failure");
        return NULL;
    }

    mem = (unsigned char*)XMALLOC(memSz, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    if (mem == NULL) {
        WOLFSSL_MSG("Malloc failure");
        return NULL;
    }

    if (wolfSSL_BIO_read(bio, (unsigned char*)mem, memSz) == memSz) {
        /* Determines key type and returns the new private EVP_PKEY object */
        if ((key = wolfSSL_d2i_PrivateKey_EVP(NULL, &mem, (long)memSz)) == NULL) {
            WOLFSSL_MSG("wolfSSL_d2i_PrivateKey_EVP() failure");
            XFREE(mem, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
            return NULL;
        }

        /* Write extra data back into bio object if necessary. */
        derLength = key->pkey_sz;
        extraBioMemSz = (memSz - derLength);
        if (extraBioMemSz > 0) {
            extraBioMem = (unsigned char *)XMALLOC(extraBioMemSz, NULL,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
            if (extraBioMem == NULL) {
                WOLFSSL_MSG("Malloc failure");
                XFREE((unsigned char*)extraBioMem, bio->heap,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
                XFREE(mem, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
                return NULL;
            }

            for (i = derLength; i < memSz; i++) {
                *(extraBioMem + j) = *(mem + i);
                j++;
            }

            wolfSSL_BIO_write(bio, extraBioMem, extraBioMemSz);
            if (wolfSSL_BIO_get_len(bio) <= 0) {
                WOLFSSL_MSG("Failed to write memory to bio");
                XFREE((unsigned char*)extraBioMem, bio->heap,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
                XFREE(mem, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
                return NULL;
            }
            XFREE((unsigned char*)extraBioMem, bio->heap,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
        }

        if (out != NULL) {
            *out = key;
        }
    }
    XFREE(mem, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    return key;
}
#endif /* !NO_BIO */


/* Converts a DER encoded private key to a WOLFSSL_EVP_PKEY structure.
 * returns a pointer to a new WOLFSSL_EVP_PKEY structure on success and NULL
 * on fail */
WOLFSSL_EVP_PKEY* wolfSSL_d2i_PrivateKey_EVP(WOLFSSL_EVP_PKEY** out,
                                                  unsigned char** in, long inSz)
{
    WOLFSSL_EVP_PKEY* pkey = NULL;
    const unsigned char* mem;
    long memSz = inSz;

    WOLFSSL_ENTER("wolfSSL_d2i_PrivateKey_EVP()");

    if (in == NULL || *in == NULL || inSz < 0) {
        WOLFSSL_MSG("Bad argument");
        return NULL;
    }
    mem = *in;

    #if !defined(NO_RSA)
    {
        RsaKey rsa;
        word32 keyIdx = 0;

        /* test if RSA key */
        if (wc_InitRsaKey(&rsa, NULL) == 0 &&
            wc_RsaPrivateKeyDecode(mem, &keyIdx, &rsa, (word32)memSz) == 0) {
            wc_FreeRsaKey(&rsa);
            pkey = wolfSSL_EVP_PKEY_new();
            if (pkey != NULL) {
                pkey->pkey_sz = keyIdx;
                pkey->pkey.ptr = (char*)XMALLOC(memSz, NULL,
                        DYNAMIC_TYPE_PRIVATE_KEY);
                if (pkey->pkey.ptr == NULL) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }
                XMEMCPY(pkey->pkey.ptr, mem, keyIdx);
                pkey->type = EVP_PKEY_RSA;
                if (out != NULL) {
                    *out = pkey;
                }

                pkey->ownRsa = 1;
                pkey->rsa = wolfSSL_RSA_new();
                if (pkey->rsa == NULL) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }

                if (wolfSSL_RSA_LoadDer_ex(pkey->rsa,
                            (const unsigned char*)pkey->pkey.ptr,
                            pkey->pkey_sz, WOLFSSL_RSA_LOAD_PRIVATE) != 1) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }

                return pkey;
            }
        }
        wc_FreeRsaKey(&rsa);
    }
    #endif /* NO_RSA */

    #ifdef HAVE_ECC
    {
        word32  keyIdx = 0;
        ecc_key ecc;

        /* test if ecc key */
        if (wc_ecc_init(&ecc) == 0 &&
            wc_EccPrivateKeyDecode(mem, &keyIdx, &ecc, (word32)memSz) == 0) {
            wc_ecc_free(&ecc);
            pkey = wolfSSL_EVP_PKEY_new();
            if (pkey != NULL) {
                pkey->pkey_sz = keyIdx;
                pkey->pkey.ptr = (char*)XMALLOC(keyIdx, NULL,
                        DYNAMIC_TYPE_PRIVATE_KEY);
                if (pkey->pkey.ptr == NULL) {
                    wolfSSL_EVP_PKEY_free(pkey);
                    return NULL;
                }
                XMEMCPY(pkey->pkey.ptr, mem, keyIdx);
                pkey->type = EVP_PKEY_EC;
                if (out != NULL) {
                    *out = pkey;
                }
                return pkey;
            }
        }
        wc_ecc_free(&ecc);
    }
    #endif /* HAVE_ECC */
    return pkey;
}
#endif /* OPENSSL_ALL || WOLFSSL_ASIO || WOLFSSL_HAPROXY || WOLFSSL_QT */


/* stunnel compatibility functions*/
#if defined(OPENSSL_ALL) || (defined(OPENSSL_EXTRA) && (defined(HAVE_STUNNEL) || \
                             defined(WOLFSSL_NGINX) || defined(HAVE_LIGHTY) || \
                             defined(WOLFSSL_HAPROXY) || defined(WOLFSSL_OPENSSH)))
void wolfSSL_ERR_remove_thread_state(void* pid)
{
    (void) pid;
    return;
}

#ifndef NO_FILESYSTEM
/***TBD ***/
void wolfSSL_print_all_errors_fp(XFILE fp)
{
    (void)fp;
}
#endif /* !NO_FILESYSTEM */

#endif /* OPENSSL_ALL || OPENSSL_EXTRA || HAVE_STUNNEL || WOLFSSL_NGINX ||
    HAVE_LIGHTY || WOLFSSL_HAPROXY || WOLFSSL_OPENSSH */


#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL) || defined(FORTRESS)
int wolfSSL_SESSION_set_ex_data(WOLFSSL_SESSION* session, int idx, void* data)
{
    WOLFSSL_ENTER("wolfSSL_SESSION_set_ex_data");
#ifdef HAVE_EX_DATA
    if(session != NULL) {
        return wolfSSL_CRYPTO_set_ex_data(&session->ex_data, idx, data);
    }
#else
    (void)session;
    (void)idx;
    (void)data;
#endif
    return WOLFSSL_FAILURE;
}

#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
int wolfSSL_SESSION_set_ex_data_with_cleanup(
    WOLFSSL_SESSION* session,
    int idx,
    void* data,
    wolfSSL_ex_data_cleanup_routine_t cleanup_routine)
{
    WOLFSSL_ENTER("wolfSSL_SESSION_set_ex_data_with_cleanup");
    if(session != NULL) {
        return wolfSSL_CRYPTO_set_ex_data_with_cleanup(&session->ex_data, idx,
                                                       data, cleanup_routine);
    }
    return WOLFSSL_FAILURE;
}
#endif /* HAVE_EX_DATA_CLEANUP_HOOKS */

void* wolfSSL_SESSION_get_ex_data(const WOLFSSL_SESSION* session, int idx)
{
    WOLFSSL_ENTER("wolfSSL_SESSION_get_ex_data");
#ifdef HAVE_EX_DATA
    if (session != NULL) {
        return wolfSSL_CRYPTO_get_ex_data(&session->ex_data, idx);
    }
#else
    (void)session;
    (void)idx;
#endif
    return NULL;
}
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL || FORTRESS */

/* Note: This is a huge section of API's - through wolfSSL_SESSION_print */
#if defined(OPENSSL_ALL) || (defined(OPENSSL_EXTRA) && (defined(HAVE_STUNNEL) || \
                             defined(WOLFSSL_NGINX) || defined(HAVE_LIGHTY) || \
                             defined(WOLFSSL_HAPROXY) || defined(WOLFSSL_OPENSSH)))


int wolfSSL_SESSION_get_ex_new_index(long idx, void* data, void* cb1,
       void* cb2, CRYPTO_free_func* cb3)
{
    WOLFSSL_ENTER("wolfSSL_SESSION_get_ex_new_index");
    (void)idx;
    (void)cb1;
    (void)cb2;
    (void)cb3;
    if (XSTRNCMP((const char*)data, "redirect index", 14) == 0) {
        return 0;
    }
    else if (XSTRNCMP((const char*)data, "addr index", 10) == 0) {
        return 1;
    }
    return WOLFSSL_FAILURE;
}


#ifndef NO_WOLFSSL_STUB
WOLFSSL_DH *wolfSSL_DH_generate_parameters(int prime_len, int generator,
                           void (*callback) (int, int, void *), void *cb_arg)
{
    (void)prime_len;
    (void)generator;
    (void)callback;
    (void)cb_arg;
    WOLFSSL_ENTER("wolfSSL_DH_generate_parameters");
    WOLFSSL_STUB("DH_generate_parameters");

    return NULL;
}
#endif

#ifndef NO_WOLFSSL_STUB
int wolfSSL_DH_generate_parameters_ex(WOLFSSL_DH* dh, int prime_len, int generator,
                           void (*callback) (int, int, void *))
{
    (void)prime_len;
    (void)generator;
    (void)callback;
    (void)dh;
    WOLFSSL_ENTER("wolfSSL_DH_generate_parameters_ex");
    WOLFSSL_STUB("DH_generate_parameters_ex");

    return -1;
}
#endif

void wolfSSL_ERR_load_crypto_strings(void)
{
    WOLFSSL_ENTER("wolfSSL_ERR_load_crypto_strings");
    /* Do nothing */
    return;
}

#ifndef NO_WOLFSSL_STUB
int wolfSSL_FIPS_mode(void)
{
    WOLFSSL_ENTER("wolfSSL_FIPS_mode");
    WOLFSSL_STUB("FIPS_mode");

    return WOLFSSL_FAILURE;
}
#endif

#ifndef NO_WOLFSSL_STUB
int wolfSSL_FIPS_mode_set(int r)
{
    (void)r;
    WOLFSSL_ENTER("wolfSSL_FIPS_mode_set");
    WOLFSSL_STUB("FIPS_mode_set");

    return WOLFSSL_FAILURE;
}
#endif

int wolfSSL_CIPHER_get_bits(const WOLFSSL_CIPHER *c, int *alg_bits)
{
    int ret = WOLFSSL_FAILURE;
    WOLFSSL_ENTER("wolfSSL_CIPHER_get_bits");

    #if defined(WOLFSSL_QT) || defined(OPENSSL_ALL)
    (void)alg_bits;
    if (c!= NULL)
        ret = c->bits;
    #else
    if (c != NULL && c->ssl != NULL) {
        ret = 8 * c->ssl->specs.key_size;
        if (alg_bits != NULL) {
            *alg_bits = ret;
        }
    }
    #endif
    return ret;
}

#if defined(OPENSSL_ALL)
WOLFSSL_X509_INFO* wolfSSL_X509_INFO_new(void)
{
    WOLFSSL_X509_INFO* info;
    info = (WOLFSSL_X509_INFO*)XMALLOC(sizeof(WOLFSSL_X509_INFO), NULL,
        DYNAMIC_TYPE_X509);
    if (info) {
        XMEMSET(info, 0, sizeof(*info));
    }
    return info;
}

void wolfSSL_X509_INFO_free(WOLFSSL_X509_INFO* info)
{
    if (info == NULL)
        return;

    if (info->x509) {
        wolfSSL_X509_free(info->x509);
        info->x509 = NULL;
    }
#ifdef HAVE_CRL
    if (info->crl) {
        wolfSSL_X509_CRL_free(info->crl);
        info->crl = NULL;
    }
#endif
    wolfSSL_X509_PKEY_free(info->x_pkey);
    info->x_pkey = NULL;

    XFREE(info, NULL, DYNAMIC_TYPE_X509);
}
#endif

WOLFSSL_STACK* wolfSSL_sk_X509_INFO_new_null(void)
{
    WOLFSSL_STACK* sk = wolfSSL_sk_new_node(NULL);
    if (sk) {
        sk->type = STACK_TYPE_X509_INFO;
    }
    return sk;
}


/* returns value less than 0 on fail to match
 * On a successful match the priority level found is returned
 */
int wolfSSL_sk_SSL_CIPHER_find(
        WOLF_STACK_OF(WOLFSSL_CIPHER)* sk, const WOLFSSL_CIPHER* toFind)
{
    WOLFSSL_STACK* next;
    int i, sz;

    if (sk == NULL || toFind == NULL) {
        return WOLFSSL_FATAL_ERROR;
    }

    sz   = wolfSSL_sk_SSL_CIPHER_num(sk);
    next = sk;
    for (i = 0; i < sz && next != NULL; i++) {
        if (next->data.cipher.cipherSuite0 == toFind->cipherSuite0 &&
                next->data.cipher.cipherSuite == toFind->cipherSuite) {
            return sz - i; /* reverse because stack pushed highest on first */
        }
        next = next->next;
    }
    return WOLFSSL_FATAL_ERROR;
}

/* nothing to do yet */
static void wolfSSL_CIPHER_free(WOLFSSL_CIPHER* in)
{
    (void)in;
}


/* free's all nodes in the stack and there data */
void wolfSSL_sk_SSL_CIPHER_free(WOLF_STACK_OF(WOLFSSL_CIPHER)* sk)
{
    WOLFSSL_STACK* current = sk;

    while (current != NULL) {
        WOLFSSL_STACK* toFree = current;
        current = current->next;

        wolfSSL_CIPHER_free(&(toFree->data.cipher));
        wolfSSL_sk_free_node(toFree);
    }
}

int wolfSSL_sk_X509_INFO_num(const WOLF_STACK_OF(WOLFSSL_X509_INFO) *sk)
{
    WOLFSSL_ENTER("wolfSSL_sk_X509_INFO_num");

    if (sk == NULL)
        return -1;
    return (int)sk->num;
}

WOLFSSL_X509_INFO* wolfSSL_sk_X509_INFO_value(const WOLF_STACK_OF(WOLFSSL_X509_INFO) *sk, int i)
{
    WOLFSSL_ENTER("wolfSSL_sk_X509_INFO_value");

    for (; sk != NULL && i > 0; i--)
        sk = sk->next;

    if (i != 0 || sk == NULL)
        return NULL;
    return sk->data.info;
}

WOLFSSL_X509_INFO* wolfSSL_sk_X509_INFO_pop(WOLF_STACK_OF(WOLFSSL_X509_INFO)* sk)
{
    WOLFSSL_STACK* node;
    WOLFSSL_X509_INFO* info;

    if (sk == NULL) {
        return NULL;
    }

    node = sk->next;
    info = sk->data.info;

    if (node != NULL) { /* update sk and remove node from stack */
        sk->data.info = node->data.info;
        sk->next = node->next;
        wolfSSL_sk_free_node(node);
    }
    else { /* last x509 in stack */
        sk->data.info = NULL;
    }

    if (sk->num > 0) {
        sk->num -= 1;
    }

    return info;
}

#if defined(OPENSSL_ALL)
void wolfSSL_sk_X509_INFO_pop_free(WOLF_STACK_OF(WOLFSSL_X509_INFO)* sk,
    void (*f) (WOLFSSL_X509_INFO*))
{
    WOLFSSL_STACK* node;

    WOLFSSL_ENTER("wolfSSL_sk_X509_INFO_pop_free");

    if (sk == NULL) {
        return;
    }

    /* parse through stack freeing each node */
    node = sk->next;
    while (node && sk->num > 1) {
        WOLFSSL_STACK* tmp = node;
        node = node->next;

        if (f)
            f(tmp->data.info);
        else
            wolfSSL_X509_INFO_free(tmp->data.info);
        tmp->data.info = NULL;
        XFREE(tmp, NULL, DYNAMIC_TYPE_OPENSSL);
        sk->num -= 1;
    }

    /* free head of stack */
    if (sk->num == 1) {
        if (f)
            f(sk->data.info);
        else
            wolfSSL_X509_INFO_free(sk->data.info);
        sk->data.info = NULL;
    }
    XFREE(sk, NULL, DYNAMIC_TYPE_OPENSSL);
}

void wolfSSL_sk_X509_INFO_free(WOLF_STACK_OF(WOLFSSL_X509_INFO) *sk)
{
    wolfSSL_sk_X509_INFO_pop_free(sk, NULL);
}


/* Adds the WOLFSSL_X509_INFO to the stack "sk". "sk" takes control of "in" and
 * tries to free it when the stack is free'd.
 *
 * return 1 on success 0 on fail
 */
int wolfSSL_sk_X509_INFO_push(WOLF_STACK_OF(WOLFSSL_X509_INFO)* sk,
                                                      WOLFSSL_X509_INFO* in)
{
    WOLFSSL_STACK* node;

    if (sk == NULL || in == NULL) {
        return WOLFSSL_FAILURE;
    }

    /* no previous values in stack */
    if (sk->data.info == NULL) {
        sk->data.info = in;
        sk->num += 1;
        return WOLFSSL_SUCCESS;
    }

    /* stack already has value(s) create a new node and add more */
    node = (WOLFSSL_STACK*)XMALLOC(sizeof(WOLFSSL_STACK), NULL,
            DYNAMIC_TYPE_X509);
    if (node == NULL) {
        WOLFSSL_MSG("Memory error");
        return WOLFSSL_FAILURE;
    }
    XMEMSET(node, 0, sizeof(WOLFSSL_STACK));

    /* push new obj onto head of stack */
    node->data.info = sk->data.info;
    node->next      = sk->next;
    node->type      = sk->type;
    sk->next        = node;
    sk->data.info   = in;
    sk->num        += 1;

    return WOLFSSL_SUCCESS;
}


WOLF_STACK_OF(WOLFSSL_X509_NAME)* wolfSSL_sk_X509_NAME_new(wolf_sk_compare_cb cb)
{
    WOLFSSL_STACK* sk;

    WOLFSSL_ENTER("wolfSSL_sk_X509_NAME_new");

    sk = wolfSSL_sk_new_node(NULL);
    if (sk != NULL) {
        sk->type = STACK_TYPE_X509_NAME;
        sk->comp = cb;
    }

    return sk;
}


/* Creates a duplicate of WOLF_STACK_OF(WOLFSSL_X509_NAME).
 * Returns a new WOLF_STACK_OF(WOLFSSL_X509_NAME) or NULL on failure */
WOLF_STACK_OF(WOLFSSL_X509_NAME) *wolfSSL_dup_CA_list(
    WOLF_STACK_OF(WOLFSSL_X509_NAME)* sk)
{
    int i;
    const int num = wolfSSL_sk_X509_NAME_num(sk);
    WOLF_STACK_OF(WOLFSSL_X509_NAME) *copy;
    WOLFSSL_X509_NAME *name;

    WOLFSSL_ENTER("wolfSSL_dup_CA_list");

    copy = wolfSSL_sk_X509_NAME_new(NULL);
    if (copy == NULL) {
        WOLFSSL_MSG("Memory error");
        return NULL;
    }

    for (i = 0; i < num; i++) {
        name = wolfSSL_X509_NAME_dup(wolfSSL_sk_X509_NAME_value(sk, i));
        if (name == NULL || 0 != wolfSSL_sk_X509_NAME_push(copy, name)) {
            WOLFSSL_MSG("Memory error");
            wolfSSL_sk_X509_NAME_pop_free(copy, wolfSSL_X509_NAME_free);
            return NULL;
        }
    }

    return copy;
}


int wolfSSL_sk_X509_NAME_push(WOLF_STACK_OF(WOLFSSL_X509_NAME)* sk,
    WOLFSSL_X509_NAME* name)
{
    WOLFSSL_STACK* node;

    WOLFSSL_ENTER("wolfSSL_sk_X509_NAME_push");

    if (sk == NULL || name == NULL) {
        return BAD_FUNC_ARG;
    }

    /* no previous values in stack */
    if (sk->data.name == NULL) {
        sk->data.name = name;
        sk->num += 1;
        return 0;
    }

    /* stack already has value(s) create a new node and add more */
    node = (WOLFSSL_STACK*)XMALLOC(sizeof(WOLFSSL_STACK), NULL,
        DYNAMIC_TYPE_OPENSSL);
    if (node == NULL) {
        WOLFSSL_MSG("Memory error");
        return MEMORY_E;
    }
    XMEMSET(node, 0, sizeof(WOLFSSL_STACK));

    /* push new obj onto head of stack */
    node->data.name = sk->data.name;
    node->next      = sk->next;
    sk->type        = STACK_TYPE_X509_NAME;
    sk->next        = node;
    sk->data.name   = name;
    sk->num        += 1;

    return 0;
}

/* return index of found, or negative to indicate not found */
int wolfSSL_sk_X509_NAME_find(const WOLF_STACK_OF(WOLFSSL_X509_NAME) *sk,
    WOLFSSL_X509_NAME *name)
{
    int i;

    WOLFSSL_ENTER("wolfSSL_sk_X509_NAME_find");

    if (sk == NULL)
        return BAD_FUNC_ARG;

    for (i = 0; sk; i++, sk = sk->next) {
        if (wolfSSL_X509_NAME_cmp(sk->data.name, name) == 0) {
            return i;
        }
    }
    return -1;
}

int wolfSSL_sk_X509_OBJECT_num(const WOLF_STACK_OF(WOLFSSL_X509_OBJECT) *s)
{
    WOLFSSL_ENTER("wolfSSL_sk_X509_OBJECT_num");
    if (s) {
        return (int)s->num;
    } else {
        return 0;
    }
}


int wolfSSL_sk_X509_NAME_set_cmp_func(WOLF_STACK_OF(WOLFSSL_X509_NAME)* sk,
    wolf_sk_compare_cb cb)
{
    WOLFSSL_ENTER("wolfSSL_sk_X509_NAME_set_cmp_func");

    if (sk == NULL)
        return BAD_FUNC_ARG;

    sk->comp = cb;
    return 0;
}
#endif /* OPENSSL_ALL */

int wolfSSL_sk_X509_NAME_num(const WOLF_STACK_OF(WOLFSSL_X509_NAME) *sk)
{
    WOLFSSL_ENTER("wolfSSL_sk_X509_NAME_num");

    if (sk == NULL)
        return BAD_FUNC_ARG;

    return (int)sk->num;
}

/* Getter function for WOLFSSL_X509_NAME pointer
 *
 * sk is the stack to retrieve pointer from
 * i  is the index value in stack
 *
 * returns a pointer to a WOLFSSL_X509_NAME structure on success and NULL on
 *         fail
 */
WOLFSSL_X509_NAME* wolfSSL_sk_X509_NAME_value(const STACK_OF(WOLFSSL_X509_NAME)* sk,
    int i)
{
    WOLFSSL_ENTER("wolfSSL_sk_X509_NAME_value");

    for (; sk != NULL && i > 0; i--) {
        sk = sk->next;
    }

    if (i != 0 || sk == NULL)
        return NULL;

    return sk->data.name;
}

WOLFSSL_X509_NAME* wolfSSL_sk_X509_NAME_pop(WOLF_STACK_OF(WOLFSSL_X509_NAME)* sk)
{
    WOLFSSL_STACK* node;
    WOLFSSL_X509_NAME* name;

    if (sk == NULL) {
        return NULL;
    }

    node = sk->next;
    name = sk->data.name;

    if (node != NULL) { /* update sk and remove node from stack */
        sk->data.name = node->data.name;
        sk->next = node->next;
        XFREE(node, NULL, DYNAMIC_TYPE_OPENSSL);
    }
    else { /* last x509 in stack */
        sk->data.name = NULL;
    }

    if (sk->num > 0) {
        sk->num -= 1;
    }

    return name;
}

void wolfSSL_sk_X509_NAME_pop_free(WOLF_STACK_OF(WOLFSSL_X509_NAME)* sk,
    void (*f) (WOLFSSL_X509_NAME*))
{
    WOLFSSL_STACK* node;
    WOLFSSL_ENTER("wolfSSL_sk_X509_NAME_pop_free");

    if (sk == NULL)
        return;

    node = sk->next;
    while (node && sk->num > 1) {
        WOLFSSL_STACK* tmp = node;
        node = node->next;
        if (f)
            f(tmp->data.name);
        else
            wolfSSL_X509_NAME_free(tmp->data.name);
        tmp->data.name = NULL;
        XFREE(tmp, NULL, DYNAMIC_TYPE_OPENSSL);
        sk->num -= 1;
    }

    /* free head of stack */
    if (sk->num == 1) {
        if (f)
            f(sk->data.name);
        else
            wolfSSL_X509_NAME_free(sk->data.name);
        sk->data.name = NULL;
    }

    XFREE(sk, sk->heap, DYNAMIC_TYPE_OPENSSL);
}

/* Free only the sk structure, NOT X509_NAME members */
void wolfSSL_sk_X509_NAME_free(WOLF_STACK_OF(WOLFSSL_X509_NAME)* sk)
{
    WOLFSSL_STACK* node;
    WOLFSSL_ENTER("wolfSSL_sk_X509_NAME_free");

    if (sk == NULL)
        return;

    node = sk->next;
    while (sk->num > 1) {
        WOLFSSL_STACK* tmp = node;
        node = node->next;
        XFREE(tmp, NULL, DYNAMIC_TYPE_OPENSSL);
        sk->num -= 1;
    }

    XFREE(sk, sk->heap, DYNAMIC_TYPE_OPENSSL);
}

#ifndef NO_BIO

#if defined(WOLFSSL_APACHE_HTTPD) || defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX)
/* Helper function for X509_NAME_print_ex. Sets *buf to string for domain
   name attribute based on NID. Returns size of buf */
static int get_dn_attr_by_nid(int n, const char** buf)
{
    int len = 0;
    const char *str;

    switch(n)
    {
        case NID_commonName :
            str = "CN";
            len = 2;
            break;
        case NID_countryName:
            str = "C";
            len = 1;
            break;
        case NID_localityName:
            str = "L";
            len = 1;
            break;
        case NID_stateOrProvinceName:
            str = "ST";
            len = 2;
            break;
        case NID_organizationName:
            str = "O";
            len = 1;
            break;
        case NID_organizationalUnitName:
            str = "OU";
            len = 2;
            break;
        case NID_emailAddress:
            str = "emailAddress";
            len = 12;
            break;
        default:
            WOLFSSL_MSG("Attribute type not found");
            str = NULL;

    }
    if (buf != NULL)
        *buf = str;
    return len;
}
#endif

/*
 * The BIO output of  wolfSSL_X509_NAME_print_ex does NOT include the null terminator
 */
int wolfSSL_X509_NAME_print_ex(WOLFSSL_BIO* bio, WOLFSSL_X509_NAME* name,
                int indent, unsigned long flags)
{
#if defined(WOLFSSL_APACHE_HTTPD) || defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX)
    int count = 0, len = 0, totalSz = 0, tmpSz = 0;
    char tmp[ASN_NAME_MAX+1];
    char fullName[ASN_NAME_MAX+2];
    const char *buf = NULL;
    WOLFSSL_X509_NAME_ENTRY* ne;
    WOLFSSL_ASN1_STRING* str;
#endif
    int i;
    (void)flags;
    WOLFSSL_ENTER("wolfSSL_X509_NAME_print_ex");

    for (i = 0; i < indent; i++) {
        if (wolfSSL_BIO_write(bio, " ", 1) != 1)
            return WOLFSSL_FAILURE;
    }

    if ((name == NULL) || (name->sz == 0))
        return WOLFSSL_FAILURE;

#if defined(WOLFSSL_APACHE_HTTPD) || defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX)
    /* If XN_FLAG_DN_REV is present, print X509_NAME in reverse order */
    if (flags == (XN_FLAG_RFC2253 & ~XN_FLAG_DN_REV)) {
        fullName[0] = '\0';
        count = wolfSSL_X509_NAME_entry_count(name);
        for (i = 0; i < count; i++) {
            ne = wolfSSL_X509_NAME_get_entry(name, count - i - 1);
            if (ne == NULL)
                return WOLFSSL_FAILURE;

            str = wolfSSL_X509_NAME_ENTRY_get_data(ne);
            if (str == NULL)
                return WOLFSSL_FAILURE;

            len = get_dn_attr_by_nid(ne->nid, &buf);
            if (len == 0 || buf == NULL)
                return WOLFSSL_FAILURE;

            tmpSz = str->length + len + 2; /* + 2 for '=' and comma */
            if (tmpSz > ASN_NAME_MAX) {
                WOLFSSL_MSG("Size greater than ASN_NAME_MAX");
                return WOLFSSL_FAILURE;
            }

            if (i < count - 1) {
                /* tmpSz+1 for last null char */
                XSNPRINTF(tmp, tmpSz+1, "%s=%s,", buf, str->data);
                XSTRNCAT(fullName, tmp, tmpSz+1);
            }
            else {
                XSNPRINTF(tmp, tmpSz, "%s=%s", buf, str->data);
                XSTRNCAT(fullName, tmp, tmpSz-1);
                tmpSz--; /* Don't include null char in tmpSz */
            }
            totalSz += tmpSz;
        }
        if (wolfSSL_BIO_write(bio, fullName, totalSz) != totalSz)
            return WOLFSSL_FAILURE;
        return WOLFSSL_SUCCESS;
    }
#else
    if (flags == XN_FLAG_RFC2253) {
        if ((name->sz < 3) ||
            (wolfSSL_BIO_write(bio, name->name + 1, name->sz - 2)
                                                            != name->sz - 2))
            return WOLFSSL_FAILURE;
    }
#endif /* WOLFSSL_APACHE_HTTPD || OPENSSL_ALL || WOLFSSL_NGINX */
    else {
        if ((name->sz < 2) ||
            (wolfSSL_BIO_write(bio, name->name, name->sz - 1) != name->sz - 1))
        return WOLFSSL_FAILURE;
    }
    return WOLFSSL_SUCCESS;
}
#endif /* !NO_BIO */

#ifndef NO_FILESYSTEM
int wolfSSL_X509_NAME_print_ex_fp(XFILE file, WOLFSSL_X509_NAME* name,
        int indent, unsigned long flags)
{
    WOLFSSL_BIO* bio;
    int ret;

    WOLFSSL_ENTER("wolfSSL_X509_NAME_print_ex_fp");

    if (!(bio = wolfSSL_BIO_new_fp(file, BIO_NOCLOSE))) {
        WOLFSSL_MSG("wolfSSL_BIO_new_fp error");
        return WOLFSSL_FAILURE;
    }

    ret = wolfSSL_X509_NAME_print_ex(bio, name, indent, flags);

    wolfSSL_BIO_free(bio);

    return ret;
}
#endif /* NO_FILESYSTEM */

#ifndef NO_WOLFSSL_STUB
WOLFSSL_ASN1_BIT_STRING* wolfSSL_X509_get0_pubkey_bitstr(const WOLFSSL_X509* x)
{
    (void)x;
    WOLFSSL_ENTER("wolfSSL_X509_get0_pubkey_bitstr");
    WOLFSSL_STUB("X509_get0_pubkey_bitstr");

    return NULL;
}
#endif

#ifndef NO_WOLFSSL_STUB
int wolfSSL_CTX_add_session(WOLFSSL_CTX* ctx, WOLFSSL_SESSION* session)
{
    (void)ctx;
    (void)session;
    WOLFSSL_ENTER("wolfSSL_CTX_add_session");
    WOLFSSL_STUB("SSL_CTX_add_session");

    return WOLFSSL_SUCCESS;
}
#endif


int wolfSSL_version(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_version");
    if (ssl->version.major == SSLv3_MAJOR) {
        switch (ssl->version.minor) {
            case SSLv3_MINOR :
                return SSL3_VERSION;
            case TLSv1_MINOR :
                return TLS1_VERSION;
            case TLSv1_1_MINOR :
                return TLS1_1_VERSION;
            case TLSv1_2_MINOR :
                return TLS1_2_VERSION;
            case TLSv1_3_MINOR :
                return TLS1_3_VERSION;
            default:
                return WOLFSSL_FAILURE;
        }
    }
    else if (ssl->version.major == DTLS_MAJOR) {
        switch (ssl->version.minor) {
            case DTLS_MINOR :
                return DTLS1_VERSION;
            case DTLSv1_2_MINOR :
                return DTLS1_2_VERSION;
            default:
                return WOLFSSL_FAILURE;
        }
    }
    return WOLFSSL_FAILURE;
}


int wolfSSL_X509_NAME_get_sz(WOLFSSL_X509_NAME* name)
{
    WOLFSSL_ENTER("wolfSSL_X509_NAME_get_sz");
    if(!name)
        return -1;
    return name->sz;
}

#ifdef HAVE_SNI
int wolfSSL_set_tlsext_host_name(WOLFSSL* ssl, const char* host_name)
{
    int ret;
    WOLFSSL_ENTER("wolfSSL_set_tlsext_host_name");
    ret = wolfSSL_UseSNI(ssl, WOLFSSL_SNI_HOST_NAME,
            host_name, (word16)XSTRLEN(host_name));
    WOLFSSL_LEAVE("wolfSSL_set_tlsext_host_name", ret);
    return ret;
}


#ifndef NO_WOLFSSL_SERVER
const char * wolfSSL_get_servername(WOLFSSL* ssl, byte type)
{
    void * serverName = NULL;
    if (ssl == NULL)
        return NULL;
    TLSX_SNI_GetRequest(ssl->extensions, type, &serverName);
    return (const char *)serverName;
}
#endif /* NO_WOLFSSL_SERVER */
#endif /* HAVE_SNI */

WOLFSSL_CTX* wolfSSL_set_SSL_CTX(WOLFSSL* ssl, WOLFSSL_CTX* ctx)
{
    if (ssl && ctx && SetSSL_CTX(ssl, ctx, 0) == WOLFSSL_SUCCESS)
        return ssl->ctx;
    return NULL;
}


VerifyCallback wolfSSL_CTX_get_verify_callback(WOLFSSL_CTX* ctx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_get_verify_callback");
    if(ctx)
        return ctx->verifyCallback;
    return NULL;
}


#ifdef HAVE_SNI

void wolfSSL_CTX_set_servername_callback(WOLFSSL_CTX* ctx, CallbackSniRecv cb)
{
    WOLFSSL_ENTER("wolfSSL_CTX_set_servername_callback");
    if (ctx)
        ctx->sniRecvCb = cb;
}

int wolfSSL_CTX_set_tlsext_servername_callback(WOLFSSL_CTX* ctx,
                                               CallbackSniRecv cb)
{
    WOLFSSL_ENTER("wolfSSL_CTX_set_tlsext_servername_callback");
    if (ctx) {
        ctx->sniRecvCb = cb;
        return WOLFSSL_SUCCESS;
    }
    return WOLFSSL_FAILURE;
}

int wolfSSL_CTX_set_servername_arg(WOLFSSL_CTX* ctx, void* arg)
{
    WOLFSSL_ENTER("wolfSSL_CTX_set_servername_arg");
    if (ctx) {
        ctx->sniRecvCbArg = arg;
        return WOLFSSL_SUCCESS;
    }
    return WOLFSSL_FAILURE;
}

#endif /* HAVE_SNI */


#ifndef NO_BIO
void wolfSSL_ERR_load_BIO_strings(void) {
    WOLFSSL_ENTER("ERR_load_BIO_strings");
    /* do nothing */
}
#endif

#ifndef NO_WOLFSSL_STUB
void wolfSSL_THREADID_set_callback(void(*threadid_func)(void*))
{
    WOLFSSL_ENTER("wolfSSL_THREADID_set_callback");
    WOLFSSL_STUB("CRYPTO_THREADID_set_callback");
    (void)threadid_func;
    return;
}
#endif

#ifndef NO_WOLFSSL_STUB
void wolfSSL_THREADID_set_numeric(void* id, unsigned long val)
{
    WOLFSSL_ENTER("wolfSSL_THREADID_set_numeric");
    WOLFSSL_STUB("CRYPTO_THREADID_set_numeric");
    (void)id;
    (void)val;
    return;
}
#endif

#ifndef NO_WOLFSSL_STUB
WOLFSSL_X509_OBJECT* wolfSSL_sk_X509_OBJECT_delete(
    WOLF_STACK_OF(WOLFSSL_X509_OBJECT)* sk, int i)
{
    WOLFSSL_ENTER("wolfSSL_sk_X509_OBJECT_delete");
    WOLFSSL_STUB("wolfSSL_sk_X509_OBJECT_delete");
    (void)sk;
    (void)i;
    return NULL;
}

void wolfSSL_X509_OBJECT_free(WOLFSSL_X509_OBJECT *a)
{
    WOLFSSL_ENTER("wolfSSL_X509_OBJECT_free");
    WOLFSSL_STUB("wolfSSL_X509_OBJECT_free");
    (void)a;
}

#endif


#endif /* OPENSSL_ALL || (OPENSSL_EXTRA && (HAVE_STUNNEL || WOLFSSL_NGINX || HAVE_LIGHTY)) */


#if defined(OPENSSL_EXTRA)

int wolfSSL_CRYPTO_memcmp(const void *a, const void *b, size_t size)
{
    if (!a || !b)
        return 0;
    return ConstantCompare((const byte*)a, (const byte*)b, (int)size);
}

int wolfSSL_sk_X509_num(const WOLF_STACK_OF(WOLFSSL_X509) *s)
{
    WOLFSSL_ENTER("wolfSSL_sk_X509_num");

    if (s == NULL)
        return -1;
    return (int)s->num;
}

unsigned long wolfSSL_ERR_peek_last_error(void)
{
    WOLFSSL_ENTER("wolfSSL_ERR_peek_last_error");

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_NGINX)
    {
        int ret;

        if ((ret = wc_PeekErrorNode(-1, NULL, NULL, NULL)) < 0) {
            WOLFSSL_MSG("Issue peeking at error node in queue");
            return 0;
        }
        if (ret == -ASN_NO_PEM_HEADER)
            return (ERR_LIB_PEM << 24) | PEM_R_NO_START_LINE;
        return (unsigned long)ret;
    }
#else
    return (unsigned long)(0 - NOT_COMPILED_IN);
#endif
}

#endif /* OPENSSL_EXTRA */

WOLFSSL_CTX* wolfSSL_get_SSL_CTX(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_get_SSL_CTX");
    return ssl->ctx;
}

#if defined(OPENSSL_ALL) || \
    defined(OPENSSL_EXTRA) || defined(HAVE_STUNNEL) || \
    defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY)

const byte* wolfSSL_SESSION_get_id(WOLFSSL_SESSION* sess, unsigned int* idLen)
{
    WOLFSSL_ENTER("wolfSSL_SESSION_get_id");
    if(!sess || !idLen) {
        WOLFSSL_MSG("Bad func args. Please provide idLen");
        return NULL;
    }
    *idLen = sess->sessionIDSz;
    return sess->sessionID;
}

#if (defined(HAVE_SESSION_TICKET) || defined(SESSION_CERTS)) && \
    !defined(NO_FILESYSTEM)

#ifndef NO_BIO

#if defined(SESSION_CERTS) || \
   (defined(WOLFSSL_TLS13) && defined(HAVE_SESSION_TICKET))
/* returns a pointer to the protocol used by the session */
static const char* wolfSSL_SESSION_get_protocol(const WOLFSSL_SESSION* in)
{
    return wolfSSL_internal_get_version((ProtocolVersion*)&in->version);
}
#endif

/* returns true (non 0) if the session has EMS (extended master secret) */
static int wolfSSL_SESSION_haveEMS(const WOLFSSL_SESSION* in)
{
    if (in == NULL)
        return 0;
    return in->haveEMS;
}

#if defined(HAVE_SESSION_TICKET)
/* prints out the ticket to bio passed in
 * return WOLFSSL_SUCCESS on success
 */
static int wolfSSL_SESSION_print_ticket(WOLFSSL_BIO* bio,
        const WOLFSSL_SESSION* in, const char* tab)
{
    unsigned short i, j, z, sz;
    short tag = 0;
    byte* pt;


    if (in == NULL || bio == NULL) {
        return BAD_FUNC_ARG;
    }

    sz = in->ticketLen;
    pt = in->ticket;

    if (wolfSSL_BIO_printf(bio, "%s\n", (sz == 0)? " NONE": "") <= 0)
        return WOLFSSL_FAILURE;

    for (i = 0; i < sz;) {
        char asc[16];

        if (sz - i < 16) {
            if (wolfSSL_BIO_printf(bio, "%s%04X -", tab, tag + (sz - i)) <= 0)
                return WOLFSSL_FAILURE;
        }
        else {
            if (wolfSSL_BIO_printf(bio, "%s%04X -", tab, tag) <= 0)
                return WOLFSSL_FAILURE;
        }
        for (j = 0; i < sz && j < 8; j++,i++) {
            asc[j] =  ((pt[i])&0x6f)>='A'?((pt[i])&0x6f):'.';
            if (wolfSSL_BIO_printf(bio, " %02X", pt[i]) <= 0)
                return WOLFSSL_FAILURE;
        }

        if (i < sz) {
            asc[j] =  ((pt[i])&0x6f)>='A'?((pt[i])&0x6f):'.';
            if (wolfSSL_BIO_printf(bio, "-%02X", pt[i]) <= 0)
                return WOLFSSL_FAILURE;
            j++;
            i++;
        }

        for (; i < sz && j < 16; j++,i++) {
            asc[j] =  ((pt[i])&0x6f)>='A'?((pt[i])&0x6f):'.';
            if (wolfSSL_BIO_printf(bio, " %02X", pt[i]) <= 0)
                return WOLFSSL_FAILURE;
        }

        /* pad out spacing */
        for (z = j; z < 17; z++) {
            if (wolfSSL_BIO_printf(bio, "   ") <= 0)
                return WOLFSSL_FAILURE;
        }

        for (z = 0; z < j; z++) {
            if (wolfSSL_BIO_printf(bio, "%c", asc[z]) <= 0)
                return WOLFSSL_FAILURE;
        }
        if (wolfSSL_BIO_printf(bio, "\n") <= 0)
            return WOLFSSL_FAILURE;

        tag += 16;
    }
    return WOLFSSL_SUCCESS;
}
#endif /* HAVE_SESSION_TICKET */


/* prints out the session information in human readable form
 * return WOLFSSL_SUCCESS on success
 */
int wolfSSL_SESSION_print(WOLFSSL_BIO *bp, const WOLFSSL_SESSION *x)
{
    const unsigned char* pt;
    unsigned char buf[SECRET_LEN];
    unsigned int sz = 0, i;
    int ret;
    WOLFSSL_SESSION* session = (WOLFSSL_SESSION*)x;

    if (session == NULL) {
        WOLFSSL_MSG("Bad NULL argument");
        return WOLFSSL_FAILURE;
    }

    if (wolfSSL_BIO_printf(bp, "%s\n", "SSL-Session:") <= 0)
        return WOLFSSL_FAILURE;

#if defined(SESSION_CERTS) || (defined(WOLFSSL_TLS13) && \
                               defined(HAVE_SESSION_TICKET))
    if (wolfSSL_BIO_printf(bp, "    Protocol  : %s\n",
            wolfSSL_SESSION_get_protocol(session)) <= 0)
        return WOLFSSL_FAILURE;
#endif

    if (wolfSSL_BIO_printf(bp, "    Cipher    : %s\n",
            wolfSSL_SESSION_CIPHER_get_name(session)) <= 0)
        return WOLFSSL_FAILURE;

    pt = wolfSSL_SESSION_get_id(session, &sz);
    if (wolfSSL_BIO_printf(bp, "    Session-ID: ") <= 0)
        return WOLFSSL_FAILURE;

    for (i = 0; i < sz; i++) {
        if (wolfSSL_BIO_printf(bp, "%02X", pt[i]) <= 0)
            return WOLFSSL_FAILURE;
    }
    if (wolfSSL_BIO_printf(bp, "\n") <= 0)
        return WOLFSSL_FAILURE;

    if (wolfSSL_BIO_printf(bp, "    Session-ID-ctx: \n") <= 0)
        return WOLFSSL_FAILURE;

    ret = wolfSSL_SESSION_get_master_key(x, buf, sizeof(buf));
    if (wolfSSL_BIO_printf(bp, "    Master-Key: ") <= 0)
        return WOLFSSL_FAILURE;

    if (ret > 0) {
        sz = (unsigned int)ret;
        for (i = 0; i < sz; i++) {
            if (wolfSSL_BIO_printf(bp, "%02X", buf[i]) <= 0)
                return WOLFSSL_FAILURE;
        }
    }
    if (wolfSSL_BIO_printf(bp, "\n") <= 0)
        return WOLFSSL_FAILURE;

    /* @TODO PSK identity hint and SRP */

    if (wolfSSL_BIO_printf(bp, "    TLS session ticket:") <= 0)
        return WOLFSSL_FAILURE;

#ifdef HAVE_SESSION_TICKET
    if (wolfSSL_SESSION_print_ticket(bp, x, "    ") != WOLFSSL_SUCCESS)
        return WOLFSSL_FAILURE;
#endif

#if !defined(NO_SESSION_CACHE) && (defined(OPENSSL_EXTRA) || \
        defined(HAVE_EXT_CACHE))
    if (wolfSSL_BIO_printf(bp, "    Start Time: %ld\n",
                wolfSSL_SESSION_get_time(x)) <= 0)
        return WOLFSSL_FAILURE;

    if (wolfSSL_BIO_printf(bp, "    Timeout   : %ld (sec)\n",
            wolfSSL_SESSION_get_timeout(x)) <= 0)
        return WOLFSSL_FAILURE;
#endif /* !NO_SESSION_CACHE && OPENSSL_EXTRA || HAVE_EXT_CACHE */

    /* @TODO verify return code print */

    if (wolfSSL_BIO_printf(bp, "    Extended master secret: %s\n",
            (wolfSSL_SESSION_haveEMS(session) == 0)? "no" : "yes") <= 0)
        return WOLFSSL_FAILURE;

    return WOLFSSL_SUCCESS;
}

#endif /* !NO_BIO */
#endif /* (HAVE_SESSION_TICKET || SESSION_CERTS) && !NO_FILESYSTEM */

#endif /* OPENSSL_ALL || OPENSSL_EXTRA || HAVE_STUNNEL || WOLFSSL_NGINX || WOLFSSL_HAPROXY */

#if defined(OPENSSL_ALL) || (defined(OPENSSL_EXTRA) && defined(HAVE_STUNNEL)) \
    || defined(WOLFSSL_MYSQL_COMPATIBLE) || defined(WOLFSSL_NGINX)

/* TODO: Doesn't currently track SSL_VERIFY_CLIENT_ONCE */
int wolfSSL_get_verify_mode(const WOLFSSL* ssl) {
    int mode = 0;
    WOLFSSL_ENTER("wolfSSL_get_verify_mode");

    if (!ssl) {
        return WOLFSSL_FAILURE;
    }

    if (ssl->options.verifyNone) {
        mode = WOLFSSL_VERIFY_NONE;
    }
    else {
        if (ssl->options.verifyPeer) {
            mode |= WOLFSSL_VERIFY_PEER;
        }
        if (ssl->options.failNoCert) {
            mode |= WOLFSSL_VERIFY_FAIL_IF_NO_PEER_CERT;
        }
        if (ssl->options.failNoCertxPSK) {
            mode |= WOLFSSL_VERIFY_FAIL_EXCEPT_PSK;
        }
    }

    WOLFSSL_LEAVE("wolfSSL_get_verify_mode", mode);
    return mode;
}

int wolfSSL_CTX_get_verify_mode(const WOLFSSL_CTX* ctx)
{
    int mode = 0;
    WOLFSSL_ENTER("wolfSSL_CTX_get_verify_mode");

    if (!ctx) {
        return WOLFSSL_FAILURE;
    }

    if (ctx->verifyNone) {
        mode = WOLFSSL_VERIFY_NONE;
    }
    else {
        if (ctx->verifyPeer) {
            mode |= WOLFSSL_VERIFY_PEER;
        }
        if (ctx->failNoCert) {
            mode |= WOLFSSL_VERIFY_FAIL_IF_NO_PEER_CERT;
        }
        if (ctx->failNoCertxPSK) {
            mode |= WOLFSSL_VERIFY_FAIL_EXCEPT_PSK;
        }
    }

    WOLFSSL_LEAVE("wolfSSL_CTX_get_verify_mode", mode);
    return mode;
}

#endif
#if defined(OPENSSL_EXTRA) && defined(HAVE_CURVE25519)
/* return 1 if success, 0 if error
 * output keys are little endian format
 */
int wolfSSL_EC25519_generate_key(unsigned char *priv, unsigned int *privSz,
                                 unsigned char *pub, unsigned int *pubSz)
{
#ifndef WOLFSSL_KEY_GEN
    WOLFSSL_MSG("No Key Gen built in");
    (void) priv;
    (void) privSz;
    (void) pub;
    (void) pubSz;
    return WOLFSSL_FAILURE;
#else /* WOLFSSL_KEY_GEN */
    int ret = WOLFSSL_FAILURE;
    int initTmpRng = 0;
    WC_RNG *rng = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG *tmpRNG = NULL;
#else
    WC_RNG tmpRNG[1];
#endif

    WOLFSSL_ENTER("wolfSSL_EC25519_generate_key");

    if (priv == NULL || privSz == NULL || *privSz < CURVE25519_KEYSIZE ||
        pub == NULL || pubSz == NULL || *pubSz < CURVE25519_KEYSIZE) {
        WOLFSSL_MSG("Bad arguments");
        return WOLFSSL_FAILURE;
    }

#ifdef WOLFSSL_SMALL_STACK
    tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
    if (tmpRNG == NULL)
        return WOLFSSL_FAILURE;
#endif
    if (wc_InitRng(tmpRNG) == 0) {
        rng = tmpRNG;
        initTmpRng = 1;
    }
    else {
        WOLFSSL_MSG("Bad RNG Init, trying global");
        if (initGlobalRNG == 0)
            WOLFSSL_MSG("Global RNG no Init");
        else
            rng = &globalRNG;
    }

    if (rng) {
        curve25519_key key;

        if (wc_curve25519_init(&key) != MP_OKAY)
            WOLFSSL_MSG("wc_curve25519_init failed");
        else if (wc_curve25519_make_key(rng, CURVE25519_KEYSIZE, &key)!=MP_OKAY)
            WOLFSSL_MSG("wc_curve25519_make_key failed");
        /* export key pair */
        else if (wc_curve25519_export_key_raw_ex(&key, priv, privSz, pub,
                                                 pubSz, EC25519_LITTLE_ENDIAN)
                 != MP_OKAY)
            WOLFSSL_MSG("wc_curve25519_export_key_raw_ex failed");
        else
            ret = WOLFSSL_SUCCESS;

        wc_curve25519_free(&key);
    }

    if (initTmpRng)
        wc_FreeRng(tmpRNG);

#ifdef WOLFSSL_SMALL_STACK
    XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif

    return ret;
#endif /* WOLFSSL_KEY_GEN */
}

/* return 1 if success, 0 if error
 * input and output keys are little endian format
 */
int wolfSSL_EC25519_shared_key(unsigned char *shared, unsigned int *sharedSz,
                               const unsigned char *priv, unsigned int privSz,
                               const unsigned char *pub, unsigned int pubSz)
{
#ifndef WOLFSSL_KEY_GEN
    WOLFSSL_MSG("No Key Gen built in");
    (void) shared;
    (void) sharedSz;
    (void) priv;
    (void) privSz;
    (void) pub;
    (void) pubSz;
    return WOLFSSL_FAILURE;
#else /* WOLFSSL_KEY_GEN */
    int ret = WOLFSSL_FAILURE;
    curve25519_key privkey, pubkey;

    WOLFSSL_ENTER("wolfSSL_EC25519_shared_key");

    if (shared == NULL || sharedSz == NULL || *sharedSz < CURVE25519_KEYSIZE ||
        priv == NULL || privSz < CURVE25519_KEYSIZE ||
        pub == NULL || pubSz < CURVE25519_KEYSIZE) {
        WOLFSSL_MSG("Bad arguments");
        return WOLFSSL_FAILURE;
    }

    /* import private key */
    if (wc_curve25519_init(&privkey) != MP_OKAY) {
        WOLFSSL_MSG("wc_curve25519_init privkey failed");
        return ret;
    }
    if (wc_curve25519_import_private_ex(priv, privSz, &privkey,
                                        EC25519_LITTLE_ENDIAN) != MP_OKAY) {
        WOLFSSL_MSG("wc_curve25519_import_private_ex failed");
        wc_curve25519_free(&privkey);
        return ret;
    }

    /* import public key */
    if (wc_curve25519_init(&pubkey) != MP_OKAY) {
        WOLFSSL_MSG("wc_curve25519_init pubkey failed");
        wc_curve25519_free(&privkey);
        return ret;
    }
    if (wc_curve25519_import_public_ex(pub, pubSz, &pubkey,
                                       EC25519_LITTLE_ENDIAN) != MP_OKAY) {
        WOLFSSL_MSG("wc_curve25519_import_public_ex failed");
        wc_curve25519_free(&privkey);
        wc_curve25519_free(&pubkey);
        return ret;
    }

    if (wc_curve25519_shared_secret_ex(&privkey, &pubkey,
                                       shared, sharedSz,
                                       EC25519_LITTLE_ENDIAN) != MP_OKAY)
        WOLFSSL_MSG("wc_curve25519_shared_secret_ex failed");
    else
        ret = WOLFSSL_SUCCESS;

    wc_curve25519_free(&privkey);
    wc_curve25519_free(&pubkey);

    return ret;
#endif /* WOLFSSL_KEY_GEN */
}
#endif /* OPENSSL_EXTRA && HAVE_CURVE25519 */

#if defined(OPENSSL_EXTRA) && defined(HAVE_ED25519)
/* return 1 if success, 0 if error
 * output keys are little endian format
 */
int wolfSSL_ED25519_generate_key(unsigned char *priv, unsigned int *privSz,
                                 unsigned char *pub, unsigned int *pubSz)
{
#ifndef WOLFSSL_KEY_GEN
    WOLFSSL_MSG("No Key Gen built in");
    (void) priv;
    (void) privSz;
    (void) pub;
    (void) pubSz;
    return WOLFSSL_FAILURE;
#else /* WOLFSSL_KEY_GEN */
    int ret = WOLFSSL_FAILURE;
    int initTmpRng = 0;
    WC_RNG *rng = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG *tmpRNG = NULL;
#else
    WC_RNG tmpRNG[1];
#endif

    WOLFSSL_ENTER("wolfSSL_ED25519_generate_key");

    if (priv == NULL || privSz == NULL || *privSz < ED25519_PRV_KEY_SIZE ||
        pub == NULL || pubSz == NULL || *pubSz < ED25519_PUB_KEY_SIZE) {
        WOLFSSL_MSG("Bad arguments");
        return WOLFSSL_FAILURE;
    }

#ifdef WOLFSSL_SMALL_STACK
    tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
    if (tmpRNG == NULL)
        return WOLFSSL_FATAL_ERROR;
#endif
    if (wc_InitRng(tmpRNG) == 0) {
        rng = tmpRNG;
        initTmpRng = 1;
    }
    else {
        WOLFSSL_MSG("Bad RNG Init, trying global");
        if (initGlobalRNG == 0)
            WOLFSSL_MSG("Global RNG no Init");
        else
            rng = &globalRNG;
    }

    if (rng) {
        ed25519_key key;

        if (wc_ed25519_init(&key) != MP_OKAY)
            WOLFSSL_MSG("wc_ed25519_init failed");
        else if (wc_ed25519_make_key(rng, ED25519_KEY_SIZE, &key)!=MP_OKAY)
            WOLFSSL_MSG("wc_ed25519_make_key failed");
        /* export private key */
        else if (wc_ed25519_export_key(&key, priv, privSz, pub, pubSz)!=MP_OKAY)
            WOLFSSL_MSG("wc_ed25519_export_key failed");
        else
            ret = WOLFSSL_SUCCESS;

        wc_ed25519_free(&key);
    }

    if (initTmpRng)
        wc_FreeRng(tmpRNG);

#ifdef WOLFSSL_SMALL_STACK
    XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif

    return ret;
#endif /* WOLFSSL_KEY_GEN */
}

/* return 1 if success, 0 if error
 * input and output keys are little endian format
 * priv is a buffer containing private and public part of key
 */
int wolfSSL_ED25519_sign(const unsigned char *msg, unsigned int msgSz,
                         const unsigned char *priv, unsigned int privSz,
                         unsigned char *sig, unsigned int *sigSz)
{
#ifndef WOLFSSL_KEY_GEN
    WOLFSSL_MSG("No Key Gen built in");
    (void) msg;
    (void) msgSz;
    (void) priv;
    (void) privSz;
    (void) sig;
    (void) sigSz;
    return WOLFSSL_FAILURE;
#else /* WOLFSSL_KEY_GEN */
    ed25519_key key;
    int ret = WOLFSSL_FAILURE;

    WOLFSSL_ENTER("wolfSSL_ED25519_sign");

    if (priv == NULL || privSz != ED25519_PRV_KEY_SIZE ||
        msg == NULL || sig == NULL || *sigSz < ED25519_SIG_SIZE) {
        WOLFSSL_MSG("Bad arguments");
        return WOLFSSL_FAILURE;
    }

    /* import key */
    if (wc_ed25519_init(&key) != MP_OKAY) {
        WOLFSSL_MSG("wc_curve25519_init failed");
        return ret;
    }
    if (wc_ed25519_import_private_key(priv, privSz/2,
                                      priv+(privSz/2), ED25519_PUB_KEY_SIZE,
                                      &key) != MP_OKAY){
        WOLFSSL_MSG("wc_ed25519_import_private failed");
        wc_ed25519_free(&key);
        return ret;
    }

    if (wc_ed25519_sign_msg(msg, msgSz, sig, sigSz, &key) != MP_OKAY)
        WOLFSSL_MSG("wc_curve25519_shared_secret_ex failed");
    else
        ret = WOLFSSL_SUCCESS;

    wc_ed25519_free(&key);

    return ret;
#endif /* WOLFSSL_KEY_GEN */
}

/* return 1 if success, 0 if error
 * input and output keys are little endian format
 * pub is a buffer containing public part of key
 */
int wolfSSL_ED25519_verify(const unsigned char *msg, unsigned int msgSz,
                           const unsigned char *pub, unsigned int pubSz,
                           const unsigned char *sig, unsigned int sigSz)
{
#ifndef WOLFSSL_KEY_GEN
    WOLFSSL_MSG("No Key Gen built in");
    (void) msg;
    (void) msgSz;
    (void) pub;
    (void) pubSz;
    (void) sig;
    (void) sigSz;
    return WOLFSSL_FAILURE;
#else /* WOLFSSL_KEY_GEN */
    ed25519_key key;
    int ret = WOLFSSL_FAILURE, check = 0;

    WOLFSSL_ENTER("wolfSSL_ED25519_verify");

    if (pub == NULL || pubSz != ED25519_PUB_KEY_SIZE ||
        msg == NULL || sig == NULL || sigSz != ED25519_SIG_SIZE) {
        WOLFSSL_MSG("Bad arguments");
        return WOLFSSL_FAILURE;
    }

    /* import key */
    if (wc_ed25519_init(&key) != MP_OKAY) {
        WOLFSSL_MSG("wc_curve25519_init failed");
        return ret;
    }
    if (wc_ed25519_import_public(pub, pubSz, &key) != MP_OKAY){
        WOLFSSL_MSG("wc_ed25519_import_public failed");
        wc_ed25519_free(&key);
        return ret;
    }

    if ((ret = wc_ed25519_verify_msg((byte*)sig, sigSz, msg, msgSz,
                                     &check, &key)) != MP_OKAY) {
        WOLFSSL_MSG("wc_ed25519_verify_msg failed");
    }
    else if (!check)
        WOLFSSL_MSG("wc_ed25519_verify_msg failed (signature invalid)");
    else
        ret = WOLFSSL_SUCCESS;

    wc_ed25519_free(&key);

    return ret;
#endif /* WOLFSSL_KEY_GEN */
}

#endif /* OPENSSL_EXTRA && HAVE_ED25519 */

#if defined(OPENSSL_EXTRA) && defined(HAVE_CURVE448)
/* return 1 if success, 0 if error
 * output keys are little endian format
 */
int wolfSSL_EC448_generate_key(unsigned char *priv, unsigned int *privSz,
                               unsigned char *pub, unsigned int *pubSz)
{
#ifndef WOLFSSL_KEY_GEN
    WOLFSSL_MSG("No Key Gen built in");
    (void) priv;
    (void) privSz;
    (void) pub;
    (void) pubSz;
    return WOLFSSL_FAILURE;
#else /* WOLFSSL_KEY_GEN */
    int ret = WOLFSSL_FAILURE;
    int initTmpRng = 0;
    WC_RNG *rng = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG *tmpRNG = NULL;
#else
    WC_RNG tmpRNG[1];
#endif

    WOLFSSL_ENTER("wolfSSL_EC448_generate_key");

    if (priv == NULL || privSz == NULL || *privSz < CURVE448_KEY_SIZE ||
        pub == NULL || pubSz == NULL || *pubSz < CURVE448_KEY_SIZE) {
        WOLFSSL_MSG("Bad arguments");
        return WOLFSSL_FAILURE;
    }

#ifdef WOLFSSL_SMALL_STACK
    tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
    if (tmpRNG == NULL)
        return WOLFSSL_FAILURE;
#endif
    if (wc_InitRng(tmpRNG) == 0) {
        rng = tmpRNG;
        initTmpRng = 1;
    }
    else {
        WOLFSSL_MSG("Bad RNG Init, trying global");
        if (initGlobalRNG == 0)
            WOLFSSL_MSG("Global RNG no Init");
        else
            rng = &globalRNG;
    }

    if (rng) {
        curve448_key key;

        if (wc_curve448_init(&key) != MP_OKAY)
            WOLFSSL_MSG("wc_curve448_init failed");
        else if (wc_curve448_make_key(rng, CURVE448_KEY_SIZE, &key)!=MP_OKAY)
            WOLFSSL_MSG("wc_curve448_make_key failed");
        /* export key pair */
        else if (wc_curve448_export_key_raw_ex(&key, priv, privSz, pub, pubSz,
                                               EC448_LITTLE_ENDIAN)
                 != MP_OKAY)
            WOLFSSL_MSG("wc_curve448_export_key_raw_ex failed");
        else
            ret = WOLFSSL_SUCCESS;

        wc_curve448_free(&key);
    }

    if (initTmpRng)
        wc_FreeRng(tmpRNG);

#ifdef WOLFSSL_SMALL_STACK
    XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif

    return ret;
#endif /* WOLFSSL_KEY_GEN */
}

/* return 1 if success, 0 if error
 * input and output keys are little endian format
 */
int wolfSSL_EC448_shared_key(unsigned char *shared, unsigned int *sharedSz,
                             const unsigned char *priv, unsigned int privSz,
                             const unsigned char *pub, unsigned int pubSz)
{
#ifndef WOLFSSL_KEY_GEN
    WOLFSSL_MSG("No Key Gen built in");
    (void) shared;
    (void) sharedSz;
    (void) priv;
    (void) privSz;
    (void) pub;
    (void) pubSz;
    return WOLFSSL_FAILURE;
#else /* WOLFSSL_KEY_GEN */
    int ret = WOLFSSL_FAILURE;
    curve448_key privkey, pubkey;

    WOLFSSL_ENTER("wolfSSL_EC448_shared_key");

    if (shared == NULL || sharedSz == NULL || *sharedSz < CURVE448_KEY_SIZE ||
            priv == NULL || privSz < CURVE448_KEY_SIZE ||
            pub == NULL || pubSz < CURVE448_KEY_SIZE) {
        WOLFSSL_MSG("Bad arguments");
        return WOLFSSL_FAILURE;
    }

    /* import private key */
    if (wc_curve448_init(&privkey) != MP_OKAY) {
        WOLFSSL_MSG("wc_curve448_init privkey failed");
        return ret;
    }
    if (wc_curve448_import_private_ex(priv, privSz, &privkey,
                                      EC448_LITTLE_ENDIAN) != MP_OKAY) {
        WOLFSSL_MSG("wc_curve448_import_private_ex failed");
        wc_curve448_free(&privkey);
        return ret;
    }

    /* import public key */
    if (wc_curve448_init(&pubkey) != MP_OKAY) {
        WOLFSSL_MSG("wc_curve448_init pubkey failed");
        wc_curve448_free(&privkey);
        return ret;
    }
    if (wc_curve448_import_public_ex(pub, pubSz, &pubkey,
                                     EC448_LITTLE_ENDIAN) != MP_OKAY) {
        WOLFSSL_MSG("wc_curve448_import_public_ex failed");
        wc_curve448_free(&privkey);
        wc_curve448_free(&pubkey);
        return ret;
    }

    if (wc_curve448_shared_secret_ex(&privkey, &pubkey, shared, sharedSz,
                                     EC448_LITTLE_ENDIAN) != MP_OKAY)
        WOLFSSL_MSG("wc_curve448_shared_secret_ex failed");
    else
        ret = WOLFSSL_SUCCESS;

    wc_curve448_free(&privkey);
    wc_curve448_free(&pubkey);

    return ret;
#endif /* WOLFSSL_KEY_GEN */
}
#endif /* OPENSSL_EXTRA && HAVE_CURVE448 */

#if defined(OPENSSL_EXTRA) && defined(HAVE_ED448)
/* return 1 if success, 0 if error
 * output keys are little endian format
 */
int wolfSSL_ED448_generate_key(unsigned char *priv, unsigned int *privSz,
                               unsigned char *pub, unsigned int *pubSz)
{
#ifndef WOLFSSL_KEY_GEN
    WOLFSSL_MSG("No Key Gen built in");
    (void) priv;
    (void) privSz;
    (void) pub;
    (void) pubSz;
    return WOLFSSL_FAILURE;
#else /* WOLFSSL_KEY_GEN */
    int ret = WOLFSSL_FAILURE;
    int initTmpRng = 0;
    WC_RNG *rng = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG *tmpRNG = NULL;
#else
    WC_RNG tmpRNG[1];
#endif

    WOLFSSL_ENTER("wolfSSL_ED448_generate_key");

    if (priv == NULL || privSz == NULL || *privSz < ED448_PRV_KEY_SIZE ||
            pub == NULL || pubSz == NULL || *pubSz < ED448_PUB_KEY_SIZE) {
        WOLFSSL_MSG("Bad arguments");
        return WOLFSSL_FAILURE;
    }

#ifdef WOLFSSL_SMALL_STACK
    tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
    if (tmpRNG == NULL)
        return WOLFSSL_FATAL_ERROR;
#endif
    if (wc_InitRng(tmpRNG) == 0) {
        rng = tmpRNG;
        initTmpRng = 1;
    }
    else {
        WOLFSSL_MSG("Bad RNG Init, trying global");
        if (initGlobalRNG == 0)
            WOLFSSL_MSG("Global RNG no Init");
        else
            rng = &globalRNG;
    }

    if (rng) {
        ed448_key key;

        if (wc_ed448_init(&key) != MP_OKAY)
            WOLFSSL_MSG("wc_ed448_init failed");
        else if (wc_ed448_make_key(rng, ED448_KEY_SIZE, &key) != MP_OKAY)
            WOLFSSL_MSG("wc_ed448_make_key failed");
        /* export private key */
        else if (wc_ed448_export_key(&key, priv, privSz, pub, pubSz) != MP_OKAY)
            WOLFSSL_MSG("wc_ed448_export_key failed");
        else
            ret = WOLFSSL_SUCCESS;

        wc_ed448_free(&key);
    }

    if (initTmpRng)
        wc_FreeRng(tmpRNG);

#ifdef WOLFSSL_SMALL_STACK
    XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif

    return ret;
#endif /* WOLFSSL_KEY_GEN */
}

/* return 1 if success, 0 if error
 * input and output keys are little endian format
 * priv is a buffer containing private and public part of key
 */
int wolfSSL_ED448_sign(const unsigned char *msg, unsigned int msgSz,
                       const unsigned char *priv, unsigned int privSz,
                       unsigned char *sig, unsigned int *sigSz)
{
#ifndef WOLFSSL_KEY_GEN
    WOLFSSL_MSG("No Key Gen built in");
    (void) msg;
    (void) msgSz;
    (void) priv;
    (void) privSz;
    (void) sig;
    (void) sigSz;
    return WOLFSSL_FAILURE;
#else /* WOLFSSL_KEY_GEN */
    ed448_key key;
    int ret = WOLFSSL_FAILURE;

    WOLFSSL_ENTER("wolfSSL_ED448_sign");

    if (priv == NULL || privSz != ED448_PRV_KEY_SIZE || msg == NULL ||
            sig == NULL || *sigSz < ED448_SIG_SIZE) {
        WOLFSSL_MSG("Bad arguments");
        return WOLFSSL_FAILURE;
    }

    /* import key */
    if (wc_ed448_init(&key) != MP_OKAY) {
        WOLFSSL_MSG("wc_curve448_init failed");
        return ret;
    }
    if (wc_ed448_import_private_key(priv, privSz/2, priv+(privSz/2),
                                    ED448_PUB_KEY_SIZE, &key) != MP_OKAY){
        WOLFSSL_MSG("wc_ed448_import_private failed");
        wc_ed448_free(&key);
        return ret;
    }

    if (wc_ed448_sign_msg(msg, msgSz, sig, sigSz, &key, NULL, 0) != MP_OKAY)
        WOLFSSL_MSG("wc_curve448_shared_secret_ex failed");
    else
        ret = WOLFSSL_SUCCESS;

    wc_ed448_free(&key);

    return ret;
#endif /* WOLFSSL_KEY_GEN */
}

/* return 1 if success, 0 if error
 * input and output keys are little endian format
 * pub is a buffer containing public part of key
 */
int wolfSSL_ED448_verify(const unsigned char *msg, unsigned int msgSz,
                         const unsigned char *pub, unsigned int pubSz,
                         const unsigned char *sig, unsigned int sigSz)
{
#ifndef WOLFSSL_KEY_GEN
    WOLFSSL_MSG("No Key Gen built in");
    (void) msg;
    (void) msgSz;
    (void) pub;
    (void) pubSz;
    (void) sig;
    (void) sigSz;
    return WOLFSSL_FAILURE;
#else /* WOLFSSL_KEY_GEN */
    ed448_key key;
    int ret = WOLFSSL_FAILURE, check = 0;

    WOLFSSL_ENTER("wolfSSL_ED448_verify");

    if (pub == NULL || pubSz != ED448_PUB_KEY_SIZE || msg == NULL ||
            sig == NULL || sigSz != ED448_SIG_SIZE) {
        WOLFSSL_MSG("Bad arguments");
        return WOLFSSL_FAILURE;
    }

    /* import key */
    if (wc_ed448_init(&key) != MP_OKAY) {
        WOLFSSL_MSG("wc_curve448_init failed");
        return ret;
    }
    if (wc_ed448_import_public(pub, pubSz, &key) != MP_OKAY){
        WOLFSSL_MSG("wc_ed448_import_public failed");
        wc_ed448_free(&key);
        return ret;
    }

    if ((ret = wc_ed448_verify_msg((byte*)sig, sigSz, msg, msgSz, &check,
                                   &key, NULL, 0)) != MP_OKAY) {
        WOLFSSL_MSG("wc_ed448_verify_msg failed");
    }
    else if (!check)
        WOLFSSL_MSG("wc_ed448_verify_msg failed (signature invalid)");
    else
        ret = WOLFSSL_SUCCESS;

    wc_ed448_free(&key);

    return ret;
#endif /* WOLFSSL_KEY_GEN */
}

#endif /* OPENSSL_EXTRA && HAVE_ED448 */

#ifdef WOLFSSL_JNI

int wolfSSL_set_jobject(WOLFSSL* ssl, void* objPtr)
{
    WOLFSSL_ENTER("wolfSSL_set_jobject");
    if (ssl != NULL)
    {
        ssl->jObjectRef = objPtr;
        return WOLFSSL_SUCCESS;
    }
    return WOLFSSL_FAILURE;
}

void* wolfSSL_get_jobject(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_get_jobject");
    if (ssl != NULL)
        return ssl->jObjectRef;
    return NULL;
}

#endif /* WOLFSSL_JNI */


#ifdef WOLFSSL_ASYNC_CRYPT
int wolfSSL_CTX_AsyncPoll(WOLFSSL_CTX* ctx, WOLF_EVENT** events, int maxEvents,
    WOLF_EVENT_FLAG flags, int* eventCount)
{
    if (ctx == NULL) {
        return BAD_FUNC_ARG;
    }

    return wolfAsync_EventQueuePoll(&ctx->event_queue, NULL,
                                        events, maxEvents, flags, eventCount);
}

int wolfSSL_AsyncPoll(WOLFSSL* ssl, WOLF_EVENT_FLAG flags)
{
    int ret, eventCount = 0;
    WOLF_EVENT* events[1];

    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    ret = wolfAsync_EventQueuePoll(&ssl->ctx->event_queue, ssl,
        events, sizeof(events)/sizeof(*events), flags, &eventCount);
    if (ret == 0) {
        ret = eventCount;
    }

    return ret;
}
#endif /* WOLFSSL_ASYNC_CRYPT */

#ifdef OPENSSL_EXTRA
unsigned long wolfSSL_ERR_peek_error_line_data(const char **file, int *line,
                                               const char **data, int *flags)
{
    WOLFSSL_ENTER("wolfSSL_ERR_peek_error_line_data");

    (void)line;
    (void)file;

    /* No data or flags stored - error display only in Nginx. */
    if (data != NULL) {
        *data = "";
    }
    if (flags != NULL) {
        *flags = 0;
    }

#if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) || \
    defined(WOLFSSL_OPENSSH) || defined(WOLFSSL_HAPROXY) || \
    defined(WOLFSSL_MYSQL_COMPATIBLE)
    {
        int ret = 0;

        while (1) {
            ret = wc_PeekErrorNode(-1, file, NULL, line);
            if (ret == BAD_MUTEX_E || ret == BAD_FUNC_ARG || ret == BAD_STATE_E) {
                WOLFSSL_MSG("Issue peeking at error node in queue");
                return 0;
            }
            /* OpenSSL uses positive error codes */
            if (ret < 0) {
                ret = -ret;
            }

            if (ret == -ASN_NO_PEM_HEADER)
                return (ERR_LIB_PEM << 24) | PEM_R_NO_START_LINE;
            if (ret != -WANT_READ && ret != -WANT_WRITE &&
                    ret != -ZERO_RETURN && ret != -WOLFSSL_ERROR_ZERO_RETURN &&
                    ret != -SOCKET_PEER_CLOSED_E && ret != -SOCKET_ERROR_E)
                break;

            wc_RemoveErrorNode(-1);
        }

        return (unsigned long)ret;
    }
#else
    return (unsigned long)(0 - NOT_COMPILED_IN);
#endif
}
#endif

#if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY)


/* Is the specified cipher suite a fake one used an an extension proxy? */
static WC_INLINE int SCSV_Check(byte suite0, byte suite)
{
    (void)suite0;
    (void)suite;
#ifdef HAVE_RENEGOTIATION_INDICATION
    if (suite0 == CIPHER_BYTE && suite == TLS_EMPTY_RENEGOTIATION_INFO_SCSV)
        return 1;
#endif
#ifdef BUILD_TLS_QSH
    /* This isn't defined as a SCSV, but it acts like one. */
    if (suite0 == QSH_BYTE && suite == TLS_QSH)
        return 1;
#endif
    return 0;
}

static WC_INLINE int sslCipherMinMaxCheck(const WOLFSSL *ssl, byte suite0,
        byte suite)
{
    const CipherSuiteInfo* cipher_names = GetCipherNames();
    int cipherSz = GetCipherNamesSize();
    int i;
    for (i = 0; i < cipherSz; i++)
        if (cipher_names[i].cipherSuite0 == suite0 &&
                cipher_names[i].cipherSuite == suite)
            break;
    if (i == cipherSz)
        return 1;
    /* Check min version */
    if (cipher_names[i].minor < ssl->options.minDowngrade) {
        if (ssl->options.minDowngrade <= TLSv1_2_MINOR &&
                cipher_names[i].minor >= TLSv1_MINOR)
            /* 1.0 ciphersuites are in general available in 1.1 and
             * 1.1 ciphersuites are in general available in 1.2 */
            return 0;
        return 1;
    }
    /* Check max version */
    switch (cipher_names[i].minor) {
    case SSLv3_MINOR :
        return ssl->options.mask & WOLFSSL_OP_NO_SSLv3;
    case TLSv1_MINOR :
        return ssl->options.mask & WOLFSSL_OP_NO_TLSv1;
    case TLSv1_1_MINOR :
        return ssl->options.mask & WOLFSSL_OP_NO_TLSv1_1;
    case TLSv1_2_MINOR :
        return ssl->options.mask & WOLFSSL_OP_NO_TLSv1_2;
    case TLSv1_3_MINOR :
        return ssl->options.mask & WOLFSSL_OP_NO_TLSv1_3;
    default:
        WOLFSSL_MSG("Unrecognized minor version");
        return 1;
    }
}

/* returns a pointer to internal cipher suite list. Should not be free'd by
 * caller.
 */
WOLF_STACK_OF(WOLFSSL_CIPHER) *wolfSSL_get_ciphers_compat(const WOLFSSL *ssl)
{
    WOLF_STACK_OF(WOLFSSL_CIPHER)* ret = NULL;
    Suites* suites;
#if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
    const CipherSuiteInfo* cipher_names = GetCipherNames();
    int cipherSz = GetCipherNamesSize();
#endif

    WOLFSSL_ENTER("wolfSSL_get_ciphers_compat");
    if (ssl == NULL || (ssl->suites == NULL && ssl->ctx->suites == NULL)) {
        return NULL;
    }

    if (ssl->suites != NULL) {
        if (ssl->suites->suiteSz == 0 &&
                InitSSL_Suites((WOLFSSL*)ssl) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Suite initialization failure");
            return NULL;
        }
        suites = ssl->suites;
    }
    else {
        suites = ssl->ctx->suites;
    }

    /* check if stack needs populated */
    if (suites->stack == NULL) {
        int i;
#if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
        int j;

        /* higher priority of cipher suite will be on top of stack */
        for (i = suites->suiteSz - 2; i >=0; i-=2) {
#else
        for (i = 0; i < suites->suiteSz; i+=2) {
#endif
            WOLFSSL_STACK* add;

            /* A couple of suites are placeholders for special options,
             * skip those. */
            if (SCSV_Check(suites->suites[i], suites->suites[i+1])
                    || sslCipherMinMaxCheck(ssl, suites->suites[i],
                                            suites->suites[i+1])) {
                continue;
            }

            add = wolfSSL_sk_new_node(ssl->heap);
            if (add != NULL) {
                add->type = STACK_TYPE_CIPHER;
                add->data.cipher.cipherSuite0 = suites->suites[i];
                add->data.cipher.cipherSuite  = suites->suites[i+1];
                add->data.cipher.ssl          = ssl;
#if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
                for (j = 0; j < cipherSz; j++) {
                    if (cipher_names[j].cipherSuite0 ==
                            add->data.cipher.cipherSuite0 &&
                            cipher_names[j].cipherSuite ==
                                    add->data.cipher.cipherSuite) {
                        add->data.cipher.offset = j;
                        break;
                    }
                }
#endif
                #if defined(WOLFSSL_QT) || defined(OPENSSL_ALL)
                /* in_stack is checked in wolfSSL_CIPHER_description */
                add->data.cipher.in_stack     = 1;
                #endif

                add->next = ret;
                if (ret != NULL) {
                    add->num = ret->num + 1;
                }
                else {
                    add->num = 1;
                }
                ret = add;
            }
        }
        suites->stack = ret;
    }
    return suites->stack;
}
#endif /* OPENSSL_ALL || WOLFSSL_NGINX || WOLFSSL_HAPROXY */

#if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY) \
 || defined(HAVE_STUNNEL)
#ifndef NO_WOLFSSL_STUB
void wolfSSL_OPENSSL_config(char *config_name)
{
    (void)config_name;
    WOLFSSL_STUB("OPENSSL_config");
}
#endif /* !NO_WOLFSSL_STUB */
#endif /* OPENSSL_ALL || WOLFSSL_NGINX || WOLFSSL_HAPROXY || HAVE_STUNNEL*/

#if defined(HAVE_EX_DATA) && (defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) \
     || defined(WOLFSSL_HAPROXY) || defined(OPENSSL_EXTRA)                   \
     || defined(HAVE_LIGHTY))

int wolfSSL_X509_get_ex_new_index(int idx, void *arg, void *a, void *b, void *c)
{

    WOLFSSL_ENTER("wolfSSL_X509_get_ex_new_index");
    (void)idx;
    (void)arg;
    (void)a;
    (void)b;
    (void)c;

    return get_ex_new_index(CRYPTO_EX_INDEX_X509);
}
#endif

#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL) || \
    defined(WOLFSSL_WPAS_SMALL)
void *wolfSSL_X509_get_ex_data(X509 *x509, int idx)
{
    WOLFSSL_ENTER("wolfSSL_X509_get_ex_data");
#ifdef HAVE_EX_DATA
    if (x509 != NULL) {
        return wolfSSL_CRYPTO_get_ex_data(&x509->ex_data, idx);
    }
#else
    (void)x509;
    (void)idx;
#endif
    return NULL;
}

int wolfSSL_X509_set_ex_data(X509 *x509, int idx, void *data)
{
    WOLFSSL_ENTER("wolfSSL_X509_set_ex_data");
#ifdef HAVE_EX_DATA
    if (x509 != NULL)
    {
        return wolfSSL_CRYPTO_set_ex_data(&x509->ex_data, idx, data);
    }
#else
    (void)x509;
    (void)idx;
    (void)data;
#endif
    return WOLFSSL_FAILURE;
}

#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
int wolfSSL_X509_set_ex_data_with_cleanup(
    X509 *x509,
    int idx,
    void *data,
    wolfSSL_ex_data_cleanup_routine_t cleanup_routine)
{
    WOLFSSL_ENTER("wolfSSL_X509_set_ex_data_with_cleanup");
    if (x509 != NULL)
    {
        return wolfSSL_CRYPTO_set_ex_data_with_cleanup(&x509->ex_data, idx,
                                                       data, cleanup_routine);
    }
    return WOLFSSL_FAILURE;
}
#endif /* HAVE_EX_DATA_CLEANUP_HOOKS */

#endif /* OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL || WOLFSSL_WPAS_SMALL */


#ifndef NO_ASN
int wolfSSL_X509_check_host(WOLFSSL_X509 *x, const char *chk, size_t chklen,
                    unsigned int flags, char **peername)
{
    int         ret;
    DecodedCert dCert;

    WOLFSSL_ENTER("wolfSSL_X509_check_host");

    /* flags and peername not needed for Nginx. */
    (void)flags;
    (void)peername;

    if ((x == NULL) || (chk == NULL)) {
        WOLFSSL_MSG("Invalid parameter");
        return WOLFSSL_FAILURE;
    }

    if (flags == WOLFSSL_NO_WILDCARDS) {
        WOLFSSL_MSG("X509_CHECK_FLAG_NO_WILDCARDS not yet implemented");
        return WOLFSSL_FAILURE;
    }

    InitDecodedCert(&dCert, x->derCert->buffer, x->derCert->length, NULL);
    ret = ParseCertRelative(&dCert, CERT_TYPE, 0, NULL);
    if (ret != 0) {
        FreeDecodedCert(&dCert);
        return WOLFSSL_FAILURE;
    }

    ret = CheckHostName(&dCert, (char *)chk, chklen);
    FreeDecodedCert(&dCert);
    if (ret != 0)
        return WOLFSSL_FAILURE;
    return WOLFSSL_SUCCESS;
}


int wolfSSL_X509_check_ip_asc(WOLFSSL_X509 *x, const char *ipasc,
        unsigned int flags)
{
    int ret = WOLFSSL_FAILURE;
    DecodedCert dCert;

    WOLFSSL_ENTER("wolfSSL_X509_check_ip_asc");

    /* flags not yet implemented */
    (void)flags;

    if ((x == NULL) || (x->derCert == NULL) || (ipasc == NULL)) {
        WOLFSSL_MSG("Invalid parameter");
    }
    else {
        ret = WOLFSSL_SUCCESS;
    }

    if (ret == WOLFSSL_SUCCESS) {
        InitDecodedCert(&dCert, x->derCert->buffer, x->derCert->length, NULL);
        ret = ParseCertRelative(&dCert, CERT_TYPE, 0, NULL);
        if (ret != 0) {
            ret = WOLFSSL_FAILURE;
        }
        else {
            ret = CheckIPAddr(&dCert, ipasc);
            if (ret != 0) {
                ret = WOLFSSL_FAILURE;
            }
            else {
                ret = WOLFSSL_SUCCESS;
            }
        }
        FreeDecodedCert(&dCert);
    }

    return ret;
}
#endif

#if defined(OPENSSL_EXTRA) && defined(WOLFSSL_CERT_GEN)
int wolfSSL_X509_check_email(WOLFSSL_X509 *x, const char *chk, size_t chkLen,
                             unsigned int flags)
{
    WOLFSSL_X509_NAME *subjName;
    int emailLen;
    char *emailBuf;

    (void)flags;

    WOLFSSL_ENTER("wolfSSL_X509_check_email");

    if ((x == NULL) || (chk == NULL)) {
        WOLFSSL_MSG("Invalid parameter");
        return WOLFSSL_FAILURE;
    }

    subjName = wolfSSL_X509_get_subject_name(x);
    if (subjName == NULL)
        return WOLFSSL_FAILURE;

    /* Call with NULL buffer to get required length. */
    emailLen = wolfSSL_X509_NAME_get_text_by_NID(subjName, NID_emailAddress,
                                                 NULL, 0);
    if (emailLen < 0)
        return WOLFSSL_FAILURE;

    ++emailLen; /* Add 1 for the NUL. */ 

    emailBuf = (char*)XMALLOC(emailLen, x->heap, DYNAMIC_TYPE_OPENSSL);
    if (emailBuf == NULL)
        return WOLFSSL_FAILURE;

    emailLen = wolfSSL_X509_NAME_get_text_by_NID(subjName, NID_emailAddress,
                                                 emailBuf, emailLen);
    if (emailLen < 0) {
        XFREE(emailBuf, x->heap, DYNAMIC_TYPE_OPENSSL);
        return WOLFSSL_FAILURE;
    }

    if (chkLen == 0)
        chkLen = XSTRLEN(chk);

    if (chkLen != (size_t)emailLen
     || XSTRNCMP(chk, emailBuf, chkLen)) {
        XFREE(emailBuf, x->heap, DYNAMIC_TYPE_OPENSSL);
        return WOLFSSL_FAILURE;
    }

    XFREE(emailBuf, x->heap, DYNAMIC_TYPE_OPENSSL);
    return WOLFSSL_SUCCESS;
}
#endif /* OPENSSL_EXTRA && WOLFSSL_CERT_GEN */

#if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY) \
    || defined(OPENSSL_EXTRA) || defined(HAVE_LIGHTY)

int wolfSSL_X509_NAME_digest(const WOLFSSL_X509_NAME *name,
        const WOLFSSL_EVP_MD *type, unsigned char *md, unsigned int *len)
{
    WOLFSSL_ENTER("wolfSSL_X509_NAME_digest");

    if (name == NULL || type == NULL)
        return WOLFSSL_FAILURE;

#if !defined(NO_FILESYSTEM) && !defined(NO_PWDBASED)
    return wolfSSL_EVP_Digest((unsigned char*)name->name,
                              name->sz, md, len, type, NULL);
#else
    (void)md;
    (void)len;
    return NOT_COMPILED_IN;
#endif
}

long wolfSSL_SSL_CTX_get_timeout(const WOLFSSL_CTX *ctx)
{
    WOLFSSL_ENTER("wolfSSL_SSL_CTX_get_timeout");

    if (ctx == NULL)
        return 0;

    return ctx->timeout;
}


/* returns the time in seconds of the current timeout */
long wolfSSL_get_timeout(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("wolfSSL_get_timeout");

    if (ssl == NULL)
        return 0;
    return ssl->timeout;
}

#ifdef HAVE_ECC
int wolfSSL_SSL_CTX_set_tmp_ecdh(WOLFSSL_CTX *ctx, WOLFSSL_EC_KEY *ecdh)
{
    WOLFSSL_ENTER("wolfSSL_SSL_CTX_set_tmp_ecdh");

    if (ctx == NULL || ecdh == NULL)
        return BAD_FUNC_ARG;

    ctx->ecdhCurveOID = ecdh->group->curve_oid;

    return WOLFSSL_SUCCESS;
}
#endif

/* Assumes that the session passed in is from the cache. */
int wolfSSL_SSL_CTX_remove_session(WOLFSSL_CTX *ctx, WOLFSSL_SESSION *s)
{
    WOLFSSL_ENTER("wolfSSL_SSL_CTX_remove_session");

    if (ctx == NULL || s == NULL)
        return BAD_FUNC_ARG;

#ifdef HAVE_EXT_CACHE
    if (!ctx->internalCacheOff)
#endif
    {
        /* Don't remove session just timeout session. */
        s->timeout = 0;
    }

#ifdef HAVE_EXT_CACHE
    if (ctx->rem_sess_cb != NULL)
        ctx->rem_sess_cb(ctx, s);
#endif

    return 0;
}

#ifndef NO_BIO
BIO *wolfSSL_SSL_get_rbio(const WOLFSSL *s)
{
    WOLFSSL_ENTER("wolfSSL_SSL_get_rbio");
    /* Nginx sets the buffer size if the read BIO is different to write BIO.
     * The setting buffer size doesn't do anything so return NULL for both.
     */
    if (s == NULL)
        return NULL;

    return s->biord;
}
BIO *wolfSSL_SSL_get_wbio(const WOLFSSL *s)
{
    WOLFSSL_ENTER("wolfSSL_SSL_get_wbio");
    (void)s;
    /* Nginx sets the buffer size if the read BIO is different to write BIO.
     * The setting buffer size doesn't do anything so return NULL for both.
     */
    if (s == NULL)
        return NULL;

    return s->biowr;
}

int wolfSSL_SSL_do_handshake(WOLFSSL *s)
{
    WOLFSSL_ENTER("wolfSSL_SSL_do_handshake");

    if (s == NULL)
        return WOLFSSL_FAILURE;

    if (s->options.side == WOLFSSL_CLIENT_END) {
    #ifndef NO_WOLFSSL_CLIENT
        return wolfSSL_connect(s);
    #else
        WOLFSSL_MSG("Client not compiled in");
        return WOLFSSL_FAILURE;
    #endif
    }

#ifndef NO_WOLFSSL_SERVER
    return wolfSSL_accept(s);
#else
    WOLFSSL_MSG("Server not compiled in");
    return WOLFSSL_FAILURE;
#endif
}

#if defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x10100000L
int wolfSSL_SSL_in_init(const WOLFSSL *ssl)
#else
int wolfSSL_SSL_in_init(WOLFSSL *ssl)
#endif
{
    WOLFSSL_ENTER("SSL_in_init");

    if (ssl == NULL)
        return WOLFSSL_FAILURE;

    if (ssl->options.side == WOLFSSL_CLIENT_END) {
        return ssl->options.connectState < SECOND_REPLY_DONE;
    }
    return ssl->options.acceptState < ACCEPT_THIRD_REPLY_DONE;
}

int wolfSSL_SSL_in_connect_init(WOLFSSL* ssl)
{
    WOLFSSL_ENTER("SSL_connect_init");

    if (ssl == NULL)
        return WOLFSSL_FAILURE;

    if (ssl->options.side == WOLFSSL_CLIENT_END) {
        return ssl->options.connectState > CONNECT_BEGIN &&
            ssl->options.connectState < SECOND_REPLY_DONE;
    }

    return ssl->options.acceptState > ACCEPT_BEGIN &&
        ssl->options.acceptState < ACCEPT_THIRD_REPLY_DONE;
}

#ifndef NO_SESSION_CACHE

WOLFSSL_SESSION *wolfSSL_SSL_get0_session(const WOLFSSL *ssl)
{
    WOLFSSL_SESSION *session;

    WOLFSSL_ENTER("wolfSSL_SSL_get0_session");

    if (ssl == NULL) {
        return NULL;
    }

    session = wolfSSL_get_session((WOLFSSL*)ssl);

#ifdef HAVE_EXT_CACHE
    ((WOLFSSL*)ssl)->extSession = session;
#endif

    return session;
}

#endif /* NO_SESSION_CACHE */

int wolfSSL_a2i_ASN1_INTEGER(WOLFSSL_BIO *bio, WOLFSSL_ASN1_INTEGER *asn1,
        char *buf, int size)
{
    int readNextLine;
    int lineLen;
    int len;
    byte isNumCheck;
    word32 outLen;
    const int extraTagSz = MAX_LENGTH_SZ + 1;
    byte intTag[MAX_LENGTH_SZ + 1];
    int idx = 0;

    WOLFSSL_ENTER("wolfSSL_a2i_ASN1_INTEGER");

    if (!bio || !asn1 || !buf || size <= 0) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    /* Reset asn1 */
    if (asn1->isDynamic && asn1->data) {
        XFREE(asn1->data, NULL, DYNAMIC_TYPE_OPENSSL);
        asn1->isDynamic = 0;
    }
    XMEMSET(asn1->intData, 0, WOLFSSL_ASN1_INTEGER_MAX);
    asn1->data = asn1->intData;
    asn1->length = 0;
    asn1->negative = 0;
    asn1->type = V_ASN1_INTEGER;

    lineLen = wolfSSL_BIO_gets(bio, buf, size);
    do {
        readNextLine = 0;
        if (lineLen <= 0) {
            WOLFSSL_MSG("wolfSSL_BIO_gets error");
            return WOLFSSL_FAILURE;
        }
        while (lineLen && (buf[lineLen-1] == '\n' || buf[lineLen-1] == '\r'))
            lineLen--;
        if (buf[lineLen-1] == '\\')
            readNextLine = 1;
        /* Ignore none-hex chars at the end of the line */
        outLen = 1;
        while (lineLen && Base16_Decode((byte*)buf + lineLen - 1, 1,
                &isNumCheck, &outLen) == ASN_INPUT_E)
            lineLen--;
        if (!lineLen || lineLen % 2) {
            WOLFSSL_MSG("Invalid line length");
            return WOLFSSL_FAILURE;
        }
        len = asn1->length + (lineLen/2);
        /* Check if it will fit in static memory and
         * save space for the ASN tag in front */
        if (len > (int)(WOLFSSL_ASN1_INTEGER_MAX - extraTagSz)) {
            /* Allocate mem for data */
            if (asn1->isDynamic) {
                byte* tmp = (byte*)XREALLOC(asn1->data, len + extraTagSz, NULL,
                        DYNAMIC_TYPE_OPENSSL);
                if (!tmp) {
                    WOLFSSL_MSG("realloc error");
                    return WOLFSSL_FAILURE;
                }
                asn1->data = tmp;
            }
            else {
                /* Up to this point asn1->data pointed to asn1->intData.
                 * Now that the size has grown larger than intData can handle
                 * the asn1 structure moves to a dynamic type with isDynamic
                 * flag being set and asn1->data being malloc'd. */
                asn1->data = (byte*)XMALLOC(len + extraTagSz, NULL,
                        DYNAMIC_TYPE_OPENSSL);
                if (!asn1->data) {
                    WOLFSSL_MSG("malloc error");
                    return WOLFSSL_FAILURE;
                }
                asn1->isDynamic = 1;
                XMEMCPY(asn1->data, asn1->intData, asn1->length);
            }
        }
        len = lineLen/2;
        if (Base16_Decode((byte*)buf, lineLen, asn1->data + asn1->length,
                (word32*)&len) != 0) {
            WOLFSSL_MSG("Base16_Decode error");
            return WOLFSSL_FAILURE;
        }
        asn1->length += len;
    } while (readNextLine);

    /* Write ASN tag */
    idx = SetASNInt(asn1->length, asn1->data[0], intTag);
    XMEMMOVE(asn1->data + idx, asn1->data, asn1->length);
    XMEMCPY(asn1->data, intTag, idx);
    asn1->dataMax = asn1->length += idx;

    return WOLFSSL_SUCCESS;
}

int wolfSSL_i2a_ASN1_INTEGER(BIO *bp, const WOLFSSL_ASN1_INTEGER *a)
{
    word32 idx = 1;
    int len = 0;
    byte buf[512];
    word32 bufLen = 512;

    WOLFSSL_ENTER("wolfSSL_i2a_ASN1_INTEGER");

    if (bp == NULL || a == NULL)
        return WOLFSSL_FAILURE;

    /* Skip ASN.1 INTEGER (type) byte. */
    if (a->data[idx] == 0x80 || /* Indefinite length, can't determine length */
            GetLength(a->data, &idx, &len, a->length) < 0) {
        return 0;
    }

    /* Zero length integer is the value zero. */
    if (len == 0) {
        return wolfSSL_BIO_write(bp, "00", 2);
    }

    if (Base16_Encode(a->data + idx, len, buf, &bufLen) != 0 ||
            bufLen <= 0) {
        return 0;
    }

    return wolfSSL_BIO_write(bp, buf, bufLen - 1); /* Don't write out NULL char */
}
#endif /* !NO_BIO */


#if defined(HAVE_SESSION_TICKET) && !defined(NO_WOLFSSL_SERVER)
/* Expected return values from implementations of OpenSSL ticket key callback.
 */
#define TICKET_KEY_CB_RET_FAILURE    -1
#define TICKET_KEY_CB_RET_NOT_FOUND   0
#define TICKET_KEY_CB_RET_OK          1
#define TICKET_KEY_CB_RET_RENEW       2

/* Implementation of session ticket encryption/decryption using OpenSSL
 * callback to initialize the cipher and HMAC.
 *
 * ssl           The SSL/TLS object.
 * keyName       The key name - used to identify the key to be used.
 * iv            The IV to use.
 * mac           The MAC of the encrypted data.
 * enc           Encrypt ticket.
 * encTicket     The ticket data.
 * encTicketLen  The length of the ticket data.
 * encLen        The encrypted/decrypted ticket length - output length.
 * ctx           Ignored. Application specific data.
 * returns WOLFSSL_TICKET_RET_OK to indicate success,
 *         WOLFSSL_TICKET_RET_CREATE if a new ticket is required and
 *         WOLFSSL_TICKET_RET_FATAL on error.
 */
static int wolfSSL_TicketKeyCb(WOLFSSL* ssl,
        unsigned char keyName[WOLFSSL_TICKET_NAME_SZ],
        unsigned char iv[WOLFSSL_TICKET_IV_SZ],
        unsigned char mac[WOLFSSL_TICKET_MAC_SZ],
        int enc, unsigned char* encTicket,
        int encTicketLen, int* encLen, void* ctx)
{
    byte                    digest[WC_MAX_DIGEST_SIZE];
    WOLFSSL_EVP_CIPHER_CTX  evpCtx;
    WOLFSSL_HMAC_CTX        hmacCtx;
    unsigned int            mdSz = 0;
    int                     len = 0;
    int                     ret = WOLFSSL_TICKET_RET_FATAL;
    int                     res;

    (void)ctx;

    WOLFSSL_ENTER("wolfSSL_TicketKeyCb");

    if (ssl == NULL || ssl->ctx == NULL || ssl->ctx->ticketEncWrapCb == NULL) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_TICKET_RET_FATAL;
    }

    /* Initialize the cipher and HMAC. */
    wolfSSL_EVP_CIPHER_CTX_init(&evpCtx);
    if (wolfSSL_HMAC_CTX_Init(&hmacCtx) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("wolfSSL_HMAC_CTX_Init error");
        return WOLFSSL_TICKET_RET_FATAL;
    }
    res = ssl->ctx->ticketEncWrapCb(ssl, keyName,
            iv, &evpCtx, &hmacCtx, enc);
    if (res != TICKET_KEY_CB_RET_OK && res != TICKET_KEY_CB_RET_RENEW) {
        WOLFSSL_MSG("Ticket callback error");
        return WOLFSSL_TICKET_RET_FATAL;
    }

    if (enc)
    {
        /* Encrypt in place. */
        if (!wolfSSL_EVP_CipherUpdate(&evpCtx, encTicket, &len,
                                      encTicket, encTicketLen))
            goto end;
        encTicketLen = len;
        if (!wolfSSL_EVP_EncryptFinal(&evpCtx, &encTicket[encTicketLen], &len))
            goto end;
        /* Total length of encrypted data. */
        encTicketLen += len;
        *encLen = encTicketLen;

        /* HMAC the encrypted data into the parameter 'mac'. */
        if (!wolfSSL_HMAC_Update(&hmacCtx, encTicket, encTicketLen))
            goto end;
#ifdef WOLFSSL_SHA512
        /* Check for SHA512, which would overrun the mac buffer */
        if (hmacCtx.hmac.macType == WC_SHA512)
            goto end;
#endif
        if (!wolfSSL_HMAC_Final(&hmacCtx, mac, &mdSz))
            goto end;
    }
    else
    {
        /* HMAC the encrypted data and compare it to the passed in data. */
        if (!wolfSSL_HMAC_Update(&hmacCtx, encTicket, encTicketLen))
            goto end;
        if (!wolfSSL_HMAC_Final(&hmacCtx, digest, &mdSz))
            goto end;
        if (XMEMCMP(mac, digest, mdSz) != 0)
            goto end;

        /* Decrypt the ticket data in place. */
        if (!wolfSSL_EVP_CipherUpdate(&evpCtx, encTicket, &len,
                                      encTicket, encTicketLen))
            goto end;
        encTicketLen = len;
        if (!wolfSSL_EVP_DecryptFinal(&evpCtx, &encTicket[encTicketLen], &len))
            goto end;
        /* Total length of decrypted data. */
        *encLen = encTicketLen + len;
    }

    ret = (res == TICKET_KEY_CB_RET_RENEW) ? WOLFSSL_TICKET_RET_CREATE :
                                             WOLFSSL_TICKET_RET_OK;
end:
    return ret;
}

/* Set the callback to use when encrypting/decrypting tickets.
 *
 * ctx  The SSL/TLS context object.
 * cb   The OpenSSL session ticket callback.
 * returns WOLFSSL_SUCCESS to indicate success.
 */
int wolfSSL_CTX_set_tlsext_ticket_key_cb(WOLFSSL_CTX *ctx, ticketCompatCb cb)
{

    /* Set the ticket encryption callback to be a wrapper around OpenSSL
     * callback.
     */
    ctx->ticketEncCb = wolfSSL_TicketKeyCb;
    ctx->ticketEncWrapCb = cb;

    return WOLFSSL_SUCCESS;
}

#endif /* HAVE_SESSION_TICKET */

#endif /* OPENSSL_ALL || WOLFSSL_NGINX || WOLFSSL_HAPROXY ||
    OPENSSL_EXTRA || HAVE_LIGHTY */

#if defined(HAVE_SESSION_TICKET) && !defined(WOLFSSL_NO_DEF_TICKET_ENC_CB) && \
    !defined(NO_WOLFSSL_SERVER)
/* Serialize the session ticket encryption keys.
 *
 * @param [in]  ctx     SSL/TLS context object.
 * @param [in]  keys    Buffer to hold session ticket keys.
 * @param [in]  keylen  Length of buffer.
 * @return  WOLFSSL_SUCCESS on success.
 * @return  WOLFSSL_FAILURE when ctx is NULL, keys is NULL or keylen is not the
 *          correct length.
 */
long wolfSSL_CTX_get_tlsext_ticket_keys(WOLFSSL_CTX *ctx,
     unsigned char *keys, int keylen)
{
    if (ctx == NULL || keys == NULL) {
        return WOLFSSL_FAILURE;
    }
    if (keylen != WOLFSSL_TICKET_KEYS_SZ) {
        return WOLFSSL_FAILURE;
    }

    XMEMCPY(keys, ctx->ticketKeyCtx.name, WOLFSSL_TICKET_NAME_SZ);
    keys += WOLFSSL_TICKET_NAME_SZ;
    XMEMCPY(keys, ctx->ticketKeyCtx.key[0], WOLFSSL_TICKET_KEY_SZ);
    keys += WOLFSSL_TICKET_KEY_SZ;
    XMEMCPY(keys, ctx->ticketKeyCtx.key[1], WOLFSSL_TICKET_KEY_SZ);
    keys += WOLFSSL_TICKET_KEY_SZ;
    c32toa(ctx->ticketKeyCtx.expirary[0], keys);
    keys += OPAQUE32_LEN;
    c32toa(ctx->ticketKeyCtx.expirary[1], keys);

    return WOLFSSL_SUCCESS;
}

/* Deserialize the session ticket encryption keys.
 *
 * @param [in]  ctx     SSL/TLS context object.
 * @param [in]  keys    Session ticket keys.
 * @param [in]  keylen  Length of data.
 * @return  WOLFSSL_SUCCESS on success.
 * @return  WOLFSSL_FAILURE when ctx is NULL, keys is NULL or keylen is not the
 *          correct length.
 */
long wolfSSL_CTX_set_tlsext_ticket_keys(WOLFSSL_CTX *ctx,
     unsigned char *keys, int keylen)
{
    if (ctx == NULL || keys == NULL) {
        return WOLFSSL_FAILURE;
    }
    if (keylen != WOLFSSL_TICKET_KEYS_SZ) {
        return WOLFSSL_FAILURE;
    }

    XMEMCPY(ctx->ticketKeyCtx.name, keys, WOLFSSL_TICKET_NAME_SZ);
    keys += WOLFSSL_TICKET_NAME_SZ;
    XMEMCPY(ctx->ticketKeyCtx.key[0], keys, WOLFSSL_TICKET_KEY_SZ);
    keys += WOLFSSL_TICKET_KEY_SZ;
    XMEMCPY(ctx->ticketKeyCtx.key[1], keys, WOLFSSL_TICKET_KEY_SZ);
    keys += WOLFSSL_TICKET_KEY_SZ;
    ato32(keys, &ctx->ticketKeyCtx.expirary[0]);
    keys += OPAQUE32_LEN;
    ato32(keys, &ctx->ticketKeyCtx.expirary[1]);

    return WOLFSSL_SUCCESS;
}
#endif

#if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY)
#ifdef HAVE_OCSP
/* Not an OpenSSL API. */
int wolfSSL_get_ocsp_response(WOLFSSL* ssl, byte** response)
{
    *response = ssl->ocspResp;
    return ssl->ocspRespSz;
}

/* Not an OpenSSL API. */
char* wolfSSL_get_ocsp_url(WOLFSSL* ssl)
{
    return ssl->url;
}

/* Not an OpenSSL API. */
int wolfSSL_set_ocsp_url(WOLFSSL* ssl, char* url)
{
    if (ssl == NULL)
        return WOLFSSL_FAILURE;

    ssl->url = url;
    return WOLFSSL_SUCCESS;
}
#endif /* OCSP */
#endif /* OPENSSL_ALL || WOLFSSL_NGINX  || WOLFSSL_HAPROXY */

#if defined(HAVE_OCSP) && !defined(NO_ASN_TIME)
int wolfSSL_get_ocsp_producedDate(
    WOLFSSL *ssl,
    byte *producedDate,
    size_t producedDate_space,
    int *producedDateFormat)
{
    if ((ssl->ocspProducedDateFormat != ASN_UTC_TIME) &&
        (ssl->ocspProducedDateFormat != ASN_GENERALIZED_TIME))
        return BAD_FUNC_ARG;

    if ((producedDate == NULL) || (producedDateFormat == NULL))
        return BAD_FUNC_ARG;

    if (XSTRLEN((char *)ssl->ocspProducedDate) >= producedDate_space)
        return BUFFER_E;

    XSTRNCPY((char *)producedDate, (const char *)ssl->ocspProducedDate, producedDate_space);
    *producedDateFormat = ssl->ocspProducedDateFormat;

    return 0;
}

int wolfSSL_get_ocsp_producedDate_tm(WOLFSSL *ssl, struct tm *produced_tm) {
    int idx = 0;

    if ((ssl->ocspProducedDateFormat != ASN_UTC_TIME) &&
        (ssl->ocspProducedDateFormat != ASN_GENERALIZED_TIME))
        return BAD_FUNC_ARG;

    if (produced_tm == NULL)
        return BAD_FUNC_ARG;

    if (ExtractDate(ssl->ocspProducedDate,
            (unsigned char)ssl->ocspProducedDateFormat, produced_tm, &idx))
        return 0;
    else
        return ASN_PARSE_E;
}
#endif


#if defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY) || \
    defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)
int wolfSSL_CTX_get_extra_chain_certs(WOLFSSL_CTX* ctx, WOLF_STACK_OF(X509)** chain)
{
    word32         idx;
    word32         length;
    WOLFSSL_STACK* node;
    WOLFSSL_STACK* last = NULL;

    if (ctx == NULL || chain == NULL) {
        chain = NULL;
        return WOLFSSL_FAILURE;
    }
    if (ctx->x509Chain != NULL) {
        *chain = ctx->x509Chain;
        return WOLFSSL_SUCCESS;
    }

    /* If there are no chains then success! */
    *chain = NULL;
    if (ctx->certChain == NULL || ctx->certChain->length == 0) {
        return WOLFSSL_SUCCESS;
    }

    /* Create a new stack of WOLFSSL_X509 object from chain buffer. */
    for (idx = 0; idx < ctx->certChain->length; ) {
        node = (WOLFSSL_STACK*)XMALLOC(sizeof(WOLFSSL_STACK), NULL,
                                       DYNAMIC_TYPE_OPENSSL);
        if (node == NULL)
            return WOLFSSL_FAILURE;
        node->next = NULL;

        /* 3 byte length | X509 DER data */
        ato24(ctx->certChain->buffer + idx, &length);
        idx += 3;

        /* Create a new X509 from DER encoded data. */
        node->data.x509 = wolfSSL_X509_d2i(NULL, ctx->certChain->buffer + idx,
            length);
        if (node->data.x509 == NULL) {
            XFREE(node, NULL, DYNAMIC_TYPE_OPENSSL);
            /* Return as much of the chain as we created. */
            ctx->x509Chain = *chain;
            return WOLFSSL_FAILURE;
        }
        idx += length;

        /* Add object to the end of the stack. */
        if (last == NULL) {
            node->num = 1;
            *chain = node;
        }
        else {
            (*chain)->num++;
            last->next = node;
        }

        last = node;
    }

    ctx->x509Chain = *chain;

    return WOLFSSL_SUCCESS;
}

int wolfSSL_CTX_set_tlsext_status_cb(WOLFSSL_CTX* ctx,
    int(*cb)(WOLFSSL*, void*))
{
    if (ctx == NULL || ctx->cm == NULL)
        return WOLFSSL_FAILURE;

#if !defined(NO_WOLFSSL_SERVER) && (defined(HAVE_CERTIFICATE_STATUS_REQUEST) \
                               ||  defined(HAVE_CERTIFICATE_STATUS_REQUEST_V2))
    /* Ensure stapling is on for callback to be used. */
    wolfSSL_CTX_EnableOCSPStapling(ctx);

    if (ctx->cm->ocsp_stapling == NULL)
        return WOLFSSL_FAILURE;

    ctx->cm->ocsp_stapling->statusCb = cb;
#else
    (void)cb;
#endif

    return WOLFSSL_SUCCESS;
}

/**
 * Find the issuing cert of the input cert. On a self-signed cert this
 * function will return an error.
 * @param issuer The issuer x509 struct is returned here
 * @param cm     The cert manager that is queried for the issuer
 * @param x      This cert's issuer will be queried in cm
 * @return       WOLFSSL_SUCCESS on success
 *               WOLFSSL_FAILURE on error
 */
static int x509GetIssuerFromCM(WOLFSSL_X509 **issuer, WOLFSSL_CERT_MANAGER* cm,
        WOLFSSL_X509 *x)
{
    Signer* ca = NULL;
#ifdef WOLFSSL_SMALL_STACK
    DecodedCert* cert = NULL;
#else
    DecodedCert  cert[1];
#endif
    /* sanity check */
    if (cm == NULL || x == NULL || x->derCert == NULL)
        return WOLFSSL_FAILURE;
        
#ifdef WOLFSSL_SMALL_STACK
    cert = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL, DYNAMIC_TYPE_DCERT);
    if (cert == NULL)
        return WOLFSSL_FAILURE;
#endif

    /* Use existing CA retrieval APIs that use DecodedCert. */
    InitDecodedCert(cert, x->derCert->buffer, x->derCert->length, NULL);
    if (ParseCertRelative(cert, CERT_TYPE, 0, NULL) == 0
            && !cert->selfSigned) {
    #ifndef NO_SKID
        if (cert->extAuthKeyIdSet)
            ca = GetCA(cm, cert->extAuthKeyId);
        if (ca == NULL)
            ca = GetCAByName(cm, cert->issuerHash);
    #else /* NO_SKID */
        ca = GetCA(cm, cert->issuerHash);
    #endif /* NO SKID */
    }
    FreeDecodedCert(cert);
#ifdef WOLFSSL_SMALL_STACK
    XFREE(cert, NULL, DYNAMIC_TYPE_DCERT);
#endif

    if (ca == NULL)
        return WOLFSSL_FAILURE;

#ifdef WOLFSSL_SIGNER_DER_CERT
    /* populate issuer with Signer DER */
    if (wolfSSL_X509_d2i(issuer, ca->derCert->buffer,
            ca->derCert->length) == NULL)
        return WOLFSSL_FAILURE;
#else
    /* Create an empty certificate as CA doesn't have a certificate. */
    *issuer = (WOLFSSL_X509 *)XMALLOC(sizeof(WOLFSSL_X509), 0,
        DYNAMIC_TYPE_OPENSSL);
    if (*issuer == NULL)
        return WOLFSSL_FAILURE;

    InitX509((*issuer), 1, NULL);
#endif

    return WOLFSSL_SUCCESS;
}

void wolfSSL_X509_email_free(WOLF_STACK_OF(WOLFSSL_STRING) *sk)
{
    WOLFSSL_STACK *curr;

    while (sk != NULL) {
        curr = sk;
        sk = sk->next;

        XFREE(curr, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}

WOLF_STACK_OF(WOLFSSL_STRING) *wolfSSL_X509_get1_ocsp(WOLFSSL_X509 *x)
{
    WOLFSSL_STACK* list = NULL;
    char*          url;

    if (x == NULL || x->authInfoSz == 0)
        return NULL;

    list = (WOLFSSL_STACK*)XMALLOC(sizeof(WOLFSSL_STACK) + x->authInfoSz + 1,
                                   NULL, DYNAMIC_TYPE_OPENSSL);
    if (list == NULL)
        return NULL;

    url = (char*)list;
    url += sizeof(WOLFSSL_STACK);
    XMEMCPY(url, x->authInfo, x->authInfoSz);
    url[x->authInfoSz] = '\0';

    list->data.string = url;
    list->next = NULL;

    return list;
}

int wolfSSL_X509_check_issued(WOLFSSL_X509 *issuer, WOLFSSL_X509 *subject)
{
    WOLFSSL_X509_NAME *issuerName = wolfSSL_X509_get_issuer_name(subject);
    WOLFSSL_X509_NAME *subjectName = wolfSSL_X509_get_subject_name(issuer);

    if (issuerName == NULL || subjectName == NULL)
        return X509_V_ERR_SUBJECT_ISSUER_MISMATCH;

    /* Literal matching of encoded names and key ids. */
    if (issuerName->sz != subjectName->sz ||
           XMEMCMP(issuerName->name, subjectName->name, subjectName->sz) != 0) {
        return X509_V_ERR_SUBJECT_ISSUER_MISMATCH;
    }

    if (subject->authKeyId != NULL && issuer->subjKeyId != NULL) {
        if (subject->authKeyIdSz != issuer->subjKeyIdSz ||
                XMEMCMP(subject->authKeyId, issuer->subjKeyId,
                        issuer->subjKeyIdSz) != 0) {
            return X509_V_ERR_SUBJECT_ISSUER_MISMATCH;
        }
    }

    return X509_V_OK;
}

WOLF_STACK_OF(WOLFSSL_STRING)* wolfSSL_sk_WOLFSSL_STRING_new(void)
{
    WOLF_STACK_OF(WOLFSSL_STRING)* ret = wolfSSL_sk_new_node(NULL);

    if (ret) {
        ret->type = STACK_TYPE_STRING;
    }

    return ret;
}

void wolfSSL_sk_WOLFSSL_STRING_free(WOLF_STACK_OF(WOLFSSL_STRING)* sk)
{
    WOLFSSL_STACK* tmp;
    WOLFSSL_ENTER("wolfSSL_sk_WOLFSSL_STRING_free");

    if (sk == NULL)
        return;

    /* parse through stack freeing each node */
    while (sk) {
        tmp = sk->next;
        XFREE(sk->data.string, NULL, DYNAMIC_TYPE_OPENSSL);
        XFREE(sk, NULL, DYNAMIC_TYPE_OPENSSL);
        sk = tmp;
    }
}

WOLFSSL_STRING wolfSSL_sk_WOLFSSL_STRING_value(WOLF_STACK_OF(WOLFSSL_STRING)* strings,
    int idx)
{
    for (; idx > 0 && strings != NULL; idx--)
        strings = strings->next;
    if (strings == NULL)
        return NULL;
    return strings->data.string;
}

int wolfSSL_sk_WOLFSSL_STRING_num(WOLF_STACK_OF(WOLFSSL_STRING)* strings)
{
    if (strings)
        return (int)strings->num;
    return 0;
}

#endif /* WOLFSSL_NGINX || WOLFSSL_HAPROXY || OPENSSL_EXTRA || OPENSSL_ALL */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
WOLFSSL_X509* wolfSSL_X509_dup(WOLFSSL_X509 *x)
{
    WOLFSSL_ENTER("wolfSSL_X509_dup");

    if (x == NULL || x->derCert == NULL) {
        WOLFSSL_MSG("Error: NULL certificate passed in");
        return NULL;
    }

    return wolfSSL_X509_d2i(NULL, x->derCert->buffer, x->derCert->length);
}
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) || \
    defined(WOLFSSL_HAPROXY) || defined(HAVE_LIGHTY)
#ifdef HAVE_ALPN
void wolfSSL_get0_alpn_selected(const WOLFSSL *ssl, const unsigned char **data,
                                unsigned int *len)
{
    word16 nameLen;

    if (ssl != NULL && data != NULL && len != NULL) {
        TLSX_ALPN_GetRequest(ssl->extensions, (void **)data, &nameLen);
        *len = nameLen;
    }
}

int wolfSSL_select_next_proto(unsigned char **out, unsigned char *outLen,
                              const unsigned char *in, unsigned int inLen,
                              const unsigned char *clientNames,
                              unsigned int clientLen)
{
    unsigned int i, j;
    byte lenIn, lenClient;

    if (out == NULL || outLen == NULL || in == NULL || clientNames == NULL)
        return OPENSSL_NPN_UNSUPPORTED;

    for (i = 0; i < inLen; i += lenIn) {
        lenIn = in[i++];
        for (j = 0; j < clientLen; j += lenClient) {
            lenClient = clientNames[j++];

            if (lenIn != lenClient)
                continue;

            if (XMEMCMP(in + i, clientNames + j, lenIn) == 0) {
                *out = (unsigned char *)(in + i);
                *outLen = lenIn;
                return OPENSSL_NPN_NEGOTIATED;
            }
        }
    }

    *out = (unsigned char *)clientNames + 1;
    *outLen = clientNames[0];
    return OPENSSL_NPN_NO_OVERLAP;
}

void wolfSSL_CTX_set_alpn_select_cb(WOLFSSL_CTX *ctx,
                                    int (*cb) (WOLFSSL *ssl,
                                               const unsigned char **out,
                                               unsigned char *outlen,
                                               const unsigned char *in,
                                               unsigned int inlen,
                                               void *arg), void *arg)
{
    if (ctx != NULL) {
        ctx->alpnSelect = cb;
        ctx->alpnSelectArg = arg;
    }
}

void wolfSSL_CTX_set_next_protos_advertised_cb(WOLFSSL_CTX *s,
                                           int (*cb) (WOLFSSL *ssl,
                                                      const unsigned char
                                                      **out,
                                                      unsigned int *outlen,
                                                      void *arg), void *arg)
{
    (void)s;
    (void)cb;
    (void)arg;
    WOLFSSL_STUB("wolfSSL_CTX_set_next_protos_advertised_cb");
}

void wolfSSL_CTX_set_next_proto_select_cb(WOLFSSL_CTX *s,
                                      int (*cb) (WOLFSSL *ssl,
                                                 unsigned char **out,
                                                 unsigned char *outlen,
                                                 const unsigned char *in,
                                                 unsigned int inlen,
                                                 void *arg), void *arg)
{
    (void)s;
    (void)cb;
    (void)arg;
    WOLFSSL_STUB("wolfSSL_CTX_set_next_proto_select_cb");
}

void wolfSSL_get0_next_proto_negotiated(const WOLFSSL *s, const unsigned char **data,
                                    unsigned *len)
{
    (void)s;
    (void)data;
    (void)len;
    WOLFSSL_STUB("wolfSSL_get0_next_proto_negotiated");
}
#endif /* HAVE_ALPN */

#endif /* WOLFSSL_NGINX  / WOLFSSL_HAPROXY */

#if defined(OPENSSL_EXTRA) && defined(HAVE_ECC)
int wolfSSL_CTX_set1_curves_list(WOLFSSL_CTX* ctx, const char* names)
{
    int idx, start = 0, len;
    word16 curve;
    char name[MAX_CURVE_NAME_SZ];

    /* Disable all curves so that only the ones the user wants are enabled. */
    ctx->disabledCurves = 0xFFFFFFFFUL;
    for (idx = 1; names[idx-1] != '\0'; idx++) {
        if (names[idx] != ':' && names[idx] != '\0')
            continue;

        len = idx - 1 - start;
        if (len > MAX_CURVE_NAME_SZ - 1)
            return WOLFSSL_FAILURE;

        XMEMCPY(name, names + start, len);
        name[len] = 0;

        if ((XSTRNCMP(name, "prime256v1", len) == 0) ||
                                      (XSTRNCMP(name, "secp256r1", len) == 0) ||
                                      (XSTRNCMP(name, "P-256", len) == 0)) {
            curve = WOLFSSL_ECC_SECP256R1;
        }
        else if ((XSTRNCMP(name, "secp384r1", len) == 0) ||
                                          (XSTRNCMP(name, "P-384", len) == 0)) {
            curve = WOLFSSL_ECC_SECP384R1;
        }
        else if ((XSTRNCMP(name, "secp521r1", len) == 0) ||
                                          (XSTRNCMP(name, "P-521", len) == 0)) {
            curve = WOLFSSL_ECC_SECP521R1;
        }
        else if (XSTRNCMP(name, "X25519", len) == 0) {
            curve = WOLFSSL_ECC_X25519;
        }
        else if (XSTRNCMP(name, "X448", len) == 0) {
            curve = WOLFSSL_ECC_X448;
        }
        else {
        #if !defined(HAVE_FIPS) && !defined(HAVE_SELFTEST)
            int   ret;
            const ecc_set_type *eccSet;

            ret = wc_ecc_get_curve_idx_from_name(name);
            if (ret < 0) {
                WOLFSSL_MSG("Could not find name in set");
                return WOLFSSL_FAILURE;
            }

            eccSet = wc_ecc_get_curve_params(ret);
            if (eccSet == NULL) {
                WOLFSSL_MSG("NULL set returned");
                return WOLFSSL_FAILURE;
            }

            curve = GetCurveByOID(eccSet->oidSum);
        #else
            WOLFSSL_MSG("API not present to search farther using name");
            return WOLFSSL_FAILURE;
        #endif
        }

        if (curve >= (sizeof(word32) * WOLFSSL_BIT_SIZE)) {
            /* shift left more than size of ctx->disabledCurves causes static
             * analysis report */
            WOLFSSL_MSG("curve value is too large for upcoming shift");
            return WOLFSSL_FAILURE;
        }

    #if defined(HAVE_SUPPORTED_CURVES) && !defined(NO_WOLFSSL_CLIENT)
        /* set the supported curve so client TLS extension contains only the
         * desired curves */
        if (wolfSSL_CTX_UseSupportedCurve(ctx, curve) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Unable to set supported curve");
            return WOLFSSL_FAILURE;
        }
    #endif

        /* Switch the bit to off and therefore is enabled. */
        ctx->disabledCurves &= ~(1U << curve);
        start = idx + 1;
    }

    return WOLFSSL_SUCCESS;
}

int wolfSSL_set1_curves_list(WOLFSSL* ssl, const char* names)
{
    if (ssl == NULL) {
        return WOLFSSL_FAILURE;
    }
    return wolfSSL_CTX_set1_curves_list(ssl->ctx, names);
}
#endif /* OPENSSL_EXTRA && HAVE_ECC */

#ifdef OPENSSL_EXTRA
#ifndef NO_WOLFSSL_STUB
int wolfSSL_CTX_set_msg_callback(WOLFSSL_CTX *ctx, SSL_Msg_Cb cb)
{
    WOLFSSL_STUB("SSL_CTX_set_msg_callback");
    (void)ctx;
    (void)cb;
    return WOLFSSL_FAILURE;
}
#endif


/* Sets a callback for when sending and receiving protocol messages.
 *
 * ssl WOLFSSL structure to set callback in
 * cb  callback to use
 *
 * return WOLFSSL_SUCCESS on success and SSL_FAILURE with error case
 */
int wolfSSL_set_msg_callback(WOLFSSL *ssl, SSL_Msg_Cb cb)
{
    WOLFSSL_ENTER("wolfSSL_set_msg_callback");

    if (ssl == NULL) {
        return SSL_FAILURE;
    }

    if (cb != NULL) {
        ssl->toInfoOn = 1;
    }

    ssl->protoMsgCb = cb;
    return WOLFSSL_SUCCESS;
}
#ifndef NO_WOLFSSL_STUB
int wolfSSL_CTX_set_msg_callback_arg(WOLFSSL_CTX *ctx, void* arg)
{
    WOLFSSL_STUB("SSL_CTX_set_msg_callback_arg");
    (void)ctx;
    (void)arg;
    return WOLFSSL_FAILURE;
}
#endif

int wolfSSL_set_msg_callback_arg(WOLFSSL *ssl, void* arg)
{
    WOLFSSL_ENTER("wolfSSL_set_msg_callback_arg");
    if (ssl == NULL)
        return WOLFSSL_FAILURE;

    ssl->protoMsgCtx = arg;
    return WOLFSSL_SUCCESS;
}

void *wolfSSL_OPENSSL_memdup(const void *data, size_t siz, const char* file, int line)
{
    void *ret;
    (void)file;
    (void)line;

    if (data == NULL || siz >= INT_MAX)
        return NULL;

    ret = OPENSSL_malloc(siz);
    if (ret == NULL) {
        return NULL;
    }
    return XMEMCPY(ret, data, siz);
}

void wolfSSL_OPENSSL_cleanse(void *ptr, size_t len)
{
    if (ptr)
        ForceZero(ptr, (word32)len);
}

int wolfSSL_CTX_set_alpn_protos(WOLFSSL_CTX *ctx, const unsigned char *p,
                            unsigned int p_len)
{
    WOLFSSL_ENTER("wolfSSL_CTX_set_alpn_protos");
    if(ctx == NULL)
        return BAD_FUNC_ARG;
    if((void *)ctx->alpn_cli_protos != NULL)
        wolfSSL_OPENSSL_free((void *)ctx->alpn_cli_protos);
    ctx->alpn_cli_protos =
        (const unsigned char *)wolfSSL_OPENSSL_memdup(p, p_len, NULL, 0);
    if (ctx->alpn_cli_protos == NULL) {
        return SSL_FAILURE;
    }
    ctx->alpn_cli_protos_len = p_len;

    return WOLFSSL_SUCCESS;
}


#ifdef HAVE_ALPN
#ifndef NO_BIO
/* Sets the ALPN extension protos
 *
 * example format is
 * unsigned char p[] = {
 *      8, 'h', 't', 't', 'p', '/', '1', '.', '1'
 * };
 *
 * returns WOLFSSL_SUCCESS on success */
int wolfSSL_set_alpn_protos(WOLFSSL* ssl,
        const unsigned char* p, unsigned int p_len)
{
    WOLFSSL_BIO* bio;
    char* pt;

    unsigned int sz;
    unsigned int idx = 0;
    int alpn_opt = WOLFSSL_ALPN_CONTINUE_ON_MISMATCH;
    WOLFSSL_ENTER("wolfSSL_set_alpn_protos");

    if (ssl == NULL || p_len <= 1) {
        return WOLFSSL_FAILURE;
    }

    bio = wolfSSL_BIO_new(wolfSSL_BIO_s_mem());
    if (bio == NULL) {
        return WOLFSSL_FAILURE;
    }

    /* convert into comma separated list */
    while (idx < p_len - 1) {
        unsigned int i;

        sz = p[idx++];
        if (idx + sz > p_len) {
            WOLFSSL_MSG("Bad list format");
            wolfSSL_BIO_free(bio);
            return WOLFSSL_FAILURE;
        }
        if (sz > 0) {
            for (i = 0; i < sz; i++) {
                wolfSSL_BIO_write(bio, &p[idx++], 1);
            }
            if (idx < p_len - 1)
                wolfSSL_BIO_write(bio, ",", 1);
        }
    }
    wolfSSL_BIO_write(bio, "\0", 1);

    /* clears out all current ALPN extensions set */
    TLSX_Remove(&ssl->extensions, TLSX_APPLICATION_LAYER_PROTOCOL, ssl->heap);

    if ((sz = wolfSSL_BIO_get_mem_data(bio, &pt)) > 0) {
        wolfSSL_UseALPN(ssl, pt, sz, alpn_opt);
    }
    wolfSSL_BIO_free(bio);
    return WOLFSSL_SUCCESS;
}
#endif /* !NO_BIO */
#endif /* HAVE_ALPN */
#endif

#if defined(OPENSSL_EXTRA)

#ifndef NO_BIO
#define WOLFSSL_BIO_INCLUDED
#include "src/bio.c"
#endif

word32 nid2oid(int nid, int grp)
{
    /* get OID type */
    switch (grp) {
        /* oidHashType */
        case oidHashType:
            switch (nid) {
            #ifdef WOLFSSL_MD2
                case NID_md2:
                    return MD2h;
            #endif
            #ifndef NO_MD5
                case NID_md5:
                    return MD5h;
            #endif
            #ifndef NO_SHA
                case NID_sha1:
                    return SHAh;
            #endif
                case NID_sha224:
                    return SHA224h;
            #ifndef NO_SHA256
                case NID_sha256:
                    return SHA256h;
            #endif
            #ifdef WOLFSSL_SHA384
                case NID_sha384:
                    return SHA384h;
            #endif
            #ifdef WOLFSSL_SHA512
                case NID_sha512:
                    return SHA512h;
            #endif
            }
            break;

        /*  oidSigType */
        case oidSigType:
            switch (nid) {
            #ifndef NO_DSA
                case CTC_SHAwDSA:
                    return CTC_SHAwDSA;
            #endif /* NO_DSA */
            #ifndef NO_RSA
                case CTC_MD2wRSA:
                    return CTC_MD2wRSA;
                case CTC_MD5wRSA:
                    return CTC_MD5wRSA;
                case CTC_SHAwRSA:
                    return CTC_SHAwRSA;
                case CTC_SHA224wRSA:
                    return CTC_SHA224wRSA;
                case CTC_SHA256wRSA:
                    return CTC_SHA256wRSA;
                case CTC_SHA384wRSA:
                    return CTC_SHA384wRSA;
                case CTC_SHA512wRSA:
                    return CTC_SHA512wRSA;
                #ifdef WOLFSSL_SHA3
                case CTC_SHA3_224wRSA:
                    return CTC_SHA3_224wRSA;
                case CTC_SHA3_256wRSA:
                    return CTC_SHA3_256wRSA;
                case CTC_SHA3_384wRSA:
                    return CTC_SHA3_384wRSA;
                case CTC_SHA3_512wRSA:
                    return CTC_SHA3_512wRSA;
                #endif
            #endif /* NO_RSA */
            #ifdef HAVE_ECC
                case CTC_SHAwECDSA:
                    return CTC_SHAwECDSA;
                case CTC_SHA224wECDSA:
                    return CTC_SHA224wECDSA;
                case CTC_SHA256wECDSA:
                    return CTC_SHA256wECDSA;
                case CTC_SHA384wECDSA:
                    return CTC_SHA384wECDSA;
                case CTC_SHA512wECDSA:
                    return CTC_SHA512wECDSA;
                #ifdef WOLFSSL_SHA3
                case CTC_SHA3_224wECDSA:
                    return CTC_SHA3_224wECDSA;
                case CTC_SHA3_256wECDSA:
                    return CTC_SHA3_256wECDSA;
                case CTC_SHA3_384wECDSA:
                    return CTC_SHA3_384wECDSA;
                case CTC_SHA3_512wECDSA:
                    return CTC_SHA3_512wECDSA;
                #endif
            #endif /* HAVE_ECC */
            }
            break;

        /* oidKeyType */
        case oidKeyType:
            switch (nid) {
            #ifndef NO_DSA
                case DSAk:
                    return DSAk;
            #endif /* NO_DSA */
            #ifndef NO_RSA
                case RSAk:
                    return RSAk;
            #endif /* NO_RSA */
            #ifdef HAVE_NTRU
                case NTRUk:
                    return NTRUk;
            #endif /* HAVE_NTRU */
            #ifdef HAVE_ECC
                case ECDSAk:
                    return ECDSAk;
            #endif /* HAVE_ECC */
            }
            break;


    #ifdef HAVE_ECC
        case oidCurveType:
            switch (nid) {
            case NID_X9_62_prime192v1:
                return ECC_SECP192R1_OID;
            case NID_X9_62_prime192v2:
                return ECC_PRIME192V2_OID;
            case NID_X9_62_prime192v3:
                return ECC_PRIME192V3_OID;
            case NID_X9_62_prime239v1:
                return ECC_PRIME239V1_OID;
            case NID_X9_62_prime239v2:
                return ECC_PRIME239V2_OID;
            case NID_X9_62_prime239v3:
                return ECC_PRIME239V3_OID;
            case NID_X9_62_prime256v1:
                return ECC_SECP256R1_OID;
            case NID_secp112r1:
                return ECC_SECP112R1_OID;
            case NID_secp112r2:
                return ECC_SECP112R2_OID;
            case NID_secp128r1:
                return ECC_SECP128R1_OID;
            case NID_secp128r2:
                return ECC_SECP128R2_OID;
            case NID_secp160r1:
                return ECC_SECP160R1_OID;
            case NID_secp160r2:
                return ECC_SECP160R2_OID;
            case NID_secp224r1:
                return ECC_SECP224R1_OID;
            case NID_secp384r1:
                return ECC_SECP384R1_OID;
            case NID_secp521r1:
                return ECC_SECP521R1_OID;
            case NID_secp160k1:
                return ECC_SECP160K1_OID;
            case NID_secp192k1:
                return ECC_SECP192K1_OID;
            case NID_secp224k1:
                return ECC_SECP224K1_OID;
            case NID_secp256k1:
                return ECC_SECP256K1_OID;
            case NID_brainpoolP160r1:
                return ECC_BRAINPOOLP160R1_OID;
            case NID_brainpoolP192r1:
                return ECC_BRAINPOOLP192R1_OID;
            case NID_brainpoolP224r1:
                return ECC_BRAINPOOLP224R1_OID;
            case NID_brainpoolP256r1:
                return ECC_BRAINPOOLP256R1_OID;
            case NID_brainpoolP320r1:
                return ECC_BRAINPOOLP320R1_OID;
            case NID_brainpoolP384r1:
                return ECC_BRAINPOOLP384R1_OID;
            case NID_brainpoolP512r1:
                return ECC_BRAINPOOLP512R1_OID;
            }
            break;
    #endif /* HAVE_ECC */

        /* oidBlkType */
        case oidBlkType:
            switch (nid) {
            #ifdef WOLFSSL_AES_128
                case AES128CBCb:
                    return AES128CBCb;
            #endif
            #ifdef WOLFSSL_AES_192
                case AES192CBCb:
                    return AES192CBCb;
            #endif
            #ifdef WOLFSSL_AES_256
                case AES256CBCb:
                    return AES256CBCb;
            #endif
            #ifndef NO_DES3
                case NID_des:
                    return DESb;
                case NID_des3:
                    return DES3b;
            #endif
            }
            break;

    #ifdef HAVE_OCSP
        case oidOcspType:
            switch (nid) {
                case NID_id_pkix_OCSP_basic:
                    return OCSP_BASIC_OID;
                case OCSP_NONCE_OID:
                    return OCSP_NONCE_OID;
            }
            break;
    #endif /* HAVE_OCSP */

        /* oidCertExtType */
        case oidCertExtType:
            switch (nid) {
                case BASIC_CA_OID:
                    return BASIC_CA_OID;
                case ALT_NAMES_OID:
                    return ALT_NAMES_OID;
                case CRL_DIST_OID:
                    return CRL_DIST_OID;
                case AUTH_INFO_OID:
                    return AUTH_INFO_OID;
                case AUTH_KEY_OID:
                    return AUTH_KEY_OID;
                case SUBJ_KEY_OID:
                    return SUBJ_KEY_OID;
                case INHIBIT_ANY_OID:
                    return INHIBIT_ANY_OID;
                case NID_key_usage:
                    return KEY_USAGE_OID;
                case NID_name_constraints:
                    return NAME_CONS_OID;
                case NID_certificate_policies:
                    return CERT_POLICY_OID;
            }
            break;

        /* oidCertAuthInfoType */
        case oidCertAuthInfoType:
            switch (nid) {
                case AIA_OCSP_OID:
                    return AIA_OCSP_OID;
                case AIA_CA_ISSUER_OID:
                    return AIA_CA_ISSUER_OID;
            }
            break;

        /* oidCertPolicyType */
        case oidCertPolicyType:
            switch (nid) {
                case NID_any_policy:
                    return CP_ANY_OID;
            }
            break;

        /* oidCertAltNameType */
        case oidCertAltNameType:
            switch (nid) {
                case NID_hw_name_oid:
                    return HW_NAME_OID;
            }
            break;

        /* oidCertKeyUseType */
        case oidCertKeyUseType:
            switch (nid) {
                case NID_anyExtendedKeyUsage:
                    return EKU_ANY_OID;
                case EKU_SERVER_AUTH_OID:
                    return EKU_SERVER_AUTH_OID;
                case EKU_CLIENT_AUTH_OID:
                    return EKU_CLIENT_AUTH_OID;
                case EKU_OCSP_SIGN_OID:
                    return EKU_OCSP_SIGN_OID;
            }
            break;

        /* oidKdfType */
        case oidKdfType:
            switch (nid) {
                case PBKDF2_OID:
                    return PBKDF2_OID;
            }
            break;

        /* oidPBEType */
        case oidPBEType:
            switch (nid) {
                case PBE_SHA1_RC4_128:
                    return PBE_SHA1_RC4_128;
                case PBE_SHA1_DES:
                    return PBE_SHA1_DES;
                case PBE_SHA1_DES3:
                    return PBE_SHA1_DES3;
            }
            break;

        /* oidKeyWrapType */
        case oidKeyWrapType:
            switch (nid) {
            #ifdef WOLFSSL_AES_128
                case AES128_WRAP:
                    return AES128_WRAP;
            #endif
            #ifdef WOLFSSL_AES_192
                case AES192_WRAP:
                    return AES192_WRAP;
            #endif
            #ifdef WOLFSSL_AES_256
                case AES256_WRAP:
                    return AES256_WRAP;
            #endif
            }
            break;

        /* oidCmsKeyAgreeType */
        case oidCmsKeyAgreeType:
            switch (nid) {
                #ifndef NO_SHA
                case dhSinglePass_stdDH_sha1kdf_scheme:
                    return dhSinglePass_stdDH_sha1kdf_scheme;
                #endif
                #ifdef WOLFSSL_SHA224
                case dhSinglePass_stdDH_sha224kdf_scheme:
                    return dhSinglePass_stdDH_sha224kdf_scheme;
                #endif
                #ifndef NO_SHA256
                case dhSinglePass_stdDH_sha256kdf_scheme:
                    return dhSinglePass_stdDH_sha256kdf_scheme;
                #endif
                #ifdef WOLFSSL_SHA384
                case dhSinglePass_stdDH_sha384kdf_scheme:
                    return dhSinglePass_stdDH_sha384kdf_scheme;
                #endif
                #ifdef WOLFSSL_SHA512
                case dhSinglePass_stdDH_sha512kdf_scheme:
                    return dhSinglePass_stdDH_sha512kdf_scheme;
                #endif
            }
            break;

        default:
            WOLFSSL_MSG("NID not in table");
            /* MSVC warns without the cast */
            return (word32)-1;
    }

    /* MSVC warns without the cast */
    return (word32)-1;
}

int oid2nid(word32 oid, int grp)
{
    size_t i;
    /* get OID type */
    switch (grp) {
        /* oidHashType */
        case oidHashType:
            switch (oid) {
            #ifdef WOLFSSL_MD2
                case MD2h:
                    return NID_md2;
            #endif
            #ifndef NO_MD5
                case MD5h:
                    return NID_md5;
            #endif
            #ifndef NO_SHA
                case SHAh:
                    return NID_sha1;
            #endif
                case SHA224h:
                    return NID_sha224;
            #ifndef NO_SHA256
                case SHA256h:
                    return NID_sha256;
            #endif
            #ifdef WOLFSSL_SHA384
                case SHA384h:
                    return NID_sha384;
            #endif
            #ifdef WOLFSSL_SHA512
                case SHA512h:
                    return NID_sha512;
            #endif
            }
            break;

        /*  oidSigType */
        case oidSigType:
            switch (oid) {
            #ifndef NO_DSA
                case CTC_SHAwDSA:
                    return CTC_SHAwDSA;
                case CTC_SHA256wDSA:
                    return CTC_SHA256wDSA;
            #endif /* NO_DSA */
            #ifndef NO_RSA
                case CTC_MD2wRSA:
                    return CTC_MD2wRSA;
                case CTC_MD5wRSA:
                    return CTC_MD5wRSA;
                case CTC_SHAwRSA:
                    return CTC_SHAwRSA;
                case CTC_SHA224wRSA:
                    return CTC_SHA224wRSA;
                case CTC_SHA256wRSA:
                    return CTC_SHA256wRSA;
                case CTC_SHA384wRSA:
                    return CTC_SHA384wRSA;
                case CTC_SHA512wRSA:
                    return CTC_SHA512wRSA;
                #ifdef WOLFSSL_SHA3
                case CTC_SHA3_224wRSA:
                    return CTC_SHA3_224wRSA;
                case CTC_SHA3_256wRSA:
                    return CTC_SHA3_256wRSA;
                case CTC_SHA3_384wRSA:
                    return CTC_SHA3_384wRSA;
                case CTC_SHA3_512wRSA:
                    return CTC_SHA3_512wRSA;
                #endif
            #endif /* NO_RSA */
            #ifdef HAVE_ECC
                case CTC_SHAwECDSA:
                    return CTC_SHAwECDSA;
                case CTC_SHA224wECDSA:
                    return CTC_SHA224wECDSA;
                case CTC_SHA256wECDSA:
                    return CTC_SHA256wECDSA;
                case CTC_SHA384wECDSA:
                    return CTC_SHA384wECDSA;
                case CTC_SHA512wECDSA:
                    return CTC_SHA512wECDSA;
                #ifdef WOLFSSL_SHA3
                case CTC_SHA3_224wECDSA:
                    return CTC_SHA3_224wECDSA;
                case CTC_SHA3_256wECDSA:
                    return CTC_SHA3_256wECDSA;
                case CTC_SHA3_384wECDSA:
                    return CTC_SHA3_384wECDSA;
                case CTC_SHA3_512wECDSA:
                    return CTC_SHA3_512wECDSA;
                #endif
            #endif /* HAVE_ECC */
            }
            break;

        /* oidKeyType */
        case oidKeyType:
            switch (oid) {
            #ifndef NO_DSA
                case DSAk:
                    return DSAk;
            #endif /* NO_DSA */
            #ifndef NO_RSA
                case RSAk:
                    return RSAk;
            #endif /* NO_RSA */
            #ifdef HAVE_NTRU
                case NTRUk:
                    return NTRUk;
            #endif /* HAVE_NTRU */
            #ifdef HAVE_ECC
                case ECDSAk:
                    return ECDSAk;
            #endif /* HAVE_ECC */
            }
            break;


    #ifdef HAVE_ECC
        case oidCurveType:
            switch (oid) {
            case ECC_SECP192R1_OID:
                return NID_X9_62_prime192v1;
            case ECC_PRIME192V2_OID:
                return NID_X9_62_prime192v2;
            case ECC_PRIME192V3_OID:
                return NID_X9_62_prime192v3;
            case ECC_PRIME239V1_OID:
                return NID_X9_62_prime239v1;
            case ECC_PRIME239V2_OID:
                return NID_X9_62_prime239v2;
            case ECC_PRIME239V3_OID:
                return NID_X9_62_prime239v3;
            case ECC_SECP256R1_OID:
                return NID_X9_62_prime256v1;
            case ECC_SECP112R1_OID:
                return NID_secp112r1;
            case ECC_SECP112R2_OID:
                return NID_secp112r2;
            case ECC_SECP128R1_OID:
                return NID_secp128r1;
            case ECC_SECP128R2_OID:
                return NID_secp128r2;
            case ECC_SECP160R1_OID:
                return NID_secp160r1;
            case ECC_SECP160R2_OID:
                return NID_secp160r2;
            case ECC_SECP224R1_OID:
                return NID_secp224r1;
            case ECC_SECP384R1_OID:
                return NID_secp384r1;
            case ECC_SECP521R1_OID:
                return NID_secp521r1;
            case ECC_SECP160K1_OID:
                return NID_secp160k1;
            case ECC_SECP192K1_OID:
                return NID_secp192k1;
            case ECC_SECP224K1_OID:
                return NID_secp224k1;
            case ECC_SECP256K1_OID:
                return NID_secp256k1;
            case ECC_BRAINPOOLP160R1_OID:
                return NID_brainpoolP160r1;
            case ECC_BRAINPOOLP192R1_OID:
                return NID_brainpoolP192r1;
            case ECC_BRAINPOOLP224R1_OID:
                return NID_brainpoolP224r1;
            case ECC_BRAINPOOLP256R1_OID:
                return NID_brainpoolP256r1;
            case ECC_BRAINPOOLP320R1_OID:
                return NID_brainpoolP320r1;
            case ECC_BRAINPOOLP384R1_OID:
                return NID_brainpoolP384r1;
            case ECC_BRAINPOOLP512R1_OID:
                return NID_brainpoolP512r1;
            }
            break;
    #endif /* HAVE_ECC */

        /* oidBlkType */
        case oidBlkType:
            switch (oid) {
            #ifdef WOLFSSL_AES_128
                case AES128CBCb:
                    return AES128CBCb;
            #endif
            #ifdef WOLFSSL_AES_192
                case AES192CBCb:
                    return AES192CBCb;
            #endif
            #ifdef WOLFSSL_AES_256
                case AES256CBCb:
                    return AES256CBCb;
            #endif
            #ifndef NO_DES3
                case DESb:
                    return NID_des;
                case DES3b:
                    return NID_des3;
            #endif
            }
            break;

    #ifdef HAVE_OCSP
        case oidOcspType:
            switch (oid) {
                case OCSP_BASIC_OID:
                    return NID_id_pkix_OCSP_basic;
                case OCSP_NONCE_OID:
                    return OCSP_NONCE_OID;
            }
            break;
    #endif /* HAVE_OCSP */

        /* oidCertExtType */
        case oidCertExtType:
            switch (oid) {
                case BASIC_CA_OID:
                    return BASIC_CA_OID;
                case ALT_NAMES_OID:
                    return ALT_NAMES_OID;
                case CRL_DIST_OID:
                    return CRL_DIST_OID;
                case AUTH_INFO_OID:
                    return AUTH_INFO_OID;
                case AUTH_KEY_OID:
                    return AUTH_KEY_OID;
                case SUBJ_KEY_OID:
                    return SUBJ_KEY_OID;
                case INHIBIT_ANY_OID:
                    return INHIBIT_ANY_OID;
                case KEY_USAGE_OID:
                    return NID_key_usage;
                case NAME_CONS_OID:
                    return NID_name_constraints;
                case CERT_POLICY_OID:
                    return NID_certificate_policies;
            }
            break;

        /* oidCertAuthInfoType */
        case oidCertAuthInfoType:
            switch (oid) {
                case AIA_OCSP_OID:
                    return AIA_OCSP_OID;
                case AIA_CA_ISSUER_OID:
                    return AIA_CA_ISSUER_OID;
            }
            break;

        /* oidCertPolicyType */
        case oidCertPolicyType:
            switch (oid) {
                case CP_ANY_OID:
                    return NID_any_policy;
            }
            break;

        /* oidCertAltNameType */
        case oidCertAltNameType:
            switch (oid) {
                case HW_NAME_OID:
                    return NID_hw_name_oid;
            }
            break;

        /* oidCertKeyUseType */
        case oidCertKeyUseType:
            switch (oid) {
                case EKU_ANY_OID:
                    return NID_anyExtendedKeyUsage;
                case EKU_SERVER_AUTH_OID:
                    return EKU_SERVER_AUTH_OID;
                case EKU_CLIENT_AUTH_OID:
                    return EKU_CLIENT_AUTH_OID;
                case EKU_OCSP_SIGN_OID:
                    return EKU_OCSP_SIGN_OID;
            }
            break;

        /* oidKdfType */
        case oidKdfType:
            switch (oid) {
                case PBKDF2_OID:
                    return PBKDF2_OID;
            }
            break;

        /* oidPBEType */
        case oidPBEType:
            switch (oid) {
                case PBE_SHA1_RC4_128:
                    return PBE_SHA1_RC4_128;
                case PBE_SHA1_DES:
                    return PBE_SHA1_DES;
                case PBE_SHA1_DES3:
                    return PBE_SHA1_DES3;
            }
            break;

        /* oidKeyWrapType */
        case oidKeyWrapType:
            switch (oid) {
            #ifdef WOLFSSL_AES_128
                case AES128_WRAP:
                    return AES128_WRAP;
            #endif
            #ifdef WOLFSSL_AES_192
                case AES192_WRAP:
                    return AES192_WRAP;
            #endif
            #ifdef WOLFSSL_AES_256
                case AES256_WRAP:
                    return AES256_WRAP;
            #endif
            }
            break;

        /* oidCmsKeyAgreeType */
        case oidCmsKeyAgreeType:
            switch (oid) {
                #ifndef NO_SHA
                case dhSinglePass_stdDH_sha1kdf_scheme:
                    return dhSinglePass_stdDH_sha1kdf_scheme;
                #endif
                #ifdef WOLFSSL_SHA224
                case dhSinglePass_stdDH_sha224kdf_scheme:
                    return dhSinglePass_stdDH_sha224kdf_scheme;
                #endif
                #ifndef NO_SHA256
                case dhSinglePass_stdDH_sha256kdf_scheme:
                    return dhSinglePass_stdDH_sha256kdf_scheme;
                #endif
                #ifdef WOLFSSL_SHA384
                case dhSinglePass_stdDH_sha384kdf_scheme:
                    return dhSinglePass_stdDH_sha384kdf_scheme;
                #endif
                #ifdef WOLFSSL_SHA512
                case dhSinglePass_stdDH_sha512kdf_scheme:
                    return dhSinglePass_stdDH_sha512kdf_scheme;
                #endif
            }
            break;

#ifdef WOLFSSL_CERT_REQ
        case oidCsrAttrType:
            switch (oid) {
                case CHALLENGE_PASSWORD_OID:
                    return NID_pkcs9_challengePassword;
                case SERIAL_NUMBER_OID:
                    return NID_serialNumber;
            }
            break;
#endif

        default:
            WOLFSSL_MSG("NID not in table");
    }
    /* If not found in above switch then try the table */
    for (i = 0; i < WOLFSSL_OBJECT_INFO_SZ; i++) {
        if (wolfssl_object_info[i].id == (int)oid) {
            return wolfssl_object_info[i].nid;
        }
    }

    return -1;
}

/* when calling SetIndividualInternal, mpi should be cleared by caller if no
 * longer used. ie mp_free(mpi). This is to free data when fastmath is
 * disabled since a copy of mpi is made by this function and placed into bn.
 */
int SetIndividualInternal(WOLFSSL_BIGNUM* bn, mp_int* mpi)
{
    WOLFSSL_MSG("Entering SetIndividualInternal");

    if (bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (mpi == NULL) {
        WOLFSSL_MSG("mpi NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (mp_copy((mp_int*)bn->internal, mpi) != MP_OKAY) {
        WOLFSSL_MSG("mp_copy error");
        return WOLFSSL_FATAL_ERROR;
    }

    return WOLFSSL_SUCCESS;
}


#ifndef NO_ASN
WOLFSSL_BIGNUM *wolfSSL_ASN1_INTEGER_to_BN(const WOLFSSL_ASN1_INTEGER *ai,
                                       WOLFSSL_BIGNUM *bn)
{
    mp_int mpi;
    word32 idx = 0;
    int ret;

    WOLFSSL_ENTER("wolfSSL_ASN1_INTEGER_to_BN");

    if (ai == NULL) {
        return NULL;
    }

    ret = GetInt(&mpi, ai->data, &idx, ai->dataMax);
    if (ret != 0) {
    #ifdef WOLFSSL_QT
        ret = mp_init(&mpi); /* must init mpi */
        if (ret != MP_OKAY) {
            return NULL;
        }
        /* Serial number in QT starts at index 0 of data */
        if (mp_read_unsigned_bin(&mpi, (byte*)ai->data, ai->length) != 0) {
                mp_clear(&mpi);
                return NULL;
            }
    #else
        /* expecting ASN1 format for INTEGER */
        WOLFSSL_LEAVE("wolfSSL_ASN1_INTEGER_to_BN", ret);
        return NULL;
    #endif
    }

    /* mp_clear needs called because mpi is copied and causes memory leak with
     * --disable-fastmath */
    ret = SetIndividualExternal(&bn, &mpi);
    mp_clear(&mpi);

    if (ret != WOLFSSL_SUCCESS) {
        return NULL;
    }
    return bn;
}
#endif /* !NO_ASN */

#if !defined(NO_DSA) && !defined(NO_DH)
WOLFSSL_DH *wolfSSL_DSA_dup_DH(const WOLFSSL_DSA *dsa)
{
    WOLFSSL_DH* dh;
    DhKey*      key;

    WOLFSSL_ENTER("wolfSSL_DSA_dup_DH");

    if (dsa == NULL) {
        return NULL;
    }

    dh = wolfSSL_DH_new();
    if (dh == NULL) {
        return NULL;
    }
    key = (DhKey*)dh->internal;

    if (dsa->p != NULL &&
        SetIndividualInternal(((WOLFSSL_DSA*)dsa)->p, &key->p) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa p key error");
        wolfSSL_DH_free(dh);
        return NULL;
    }
    if (dsa->g != NULL &&
        SetIndividualInternal(((WOLFSSL_DSA*)dsa)->g, &key->g) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa g key error");
        wolfSSL_DH_free(dh);
        return NULL;
    }

    if (SetIndividualExternal(&dh->p, &key->p) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("dsa p key error");
        wolfSSL_DH_free(dh);
        return NULL;
    }
    if (SetIndividualExternal(&dh->g, &key->g) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("dsa g key error");
        wolfSSL_DH_free(dh);
        return NULL;
    }

    return dh;
}
#endif /* !NO_DSA && !NO_DH */


#ifndef NO_RSA
#if !defined(HAVE_USER_RSA) && !defined(HAVE_FAST_RSA)
/* Openssl -> WolfSSL */
int SetRsaInternal(WOLFSSL_RSA* rsa)
{
    RsaKey* key;
    WOLFSSL_MSG("Entering SetRsaInternal");

    if (rsa == NULL || rsa->internal == NULL) {
        WOLFSSL_MSG("rsa key NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    key = (RsaKey*)rsa->internal;

    if (SetIndividualInternal(rsa->n, &key->n) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa n key error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (SetIndividualInternal(rsa->e, &key->e) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa e key error");
        return WOLFSSL_FATAL_ERROR;
    }

    /* public key */
    key->type = RSA_PUBLIC;

    if (rsa->d != NULL) {
        if (SetIndividualInternal(rsa->d, &key->d) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("rsa d key error");
            return WOLFSSL_FATAL_ERROR;
        }

        /* private key */
        key->type = RSA_PRIVATE;
    }

    if (rsa->p != NULL &&
        SetIndividualInternal(rsa->p, &key->p) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa p key error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (rsa->q != NULL &&
        SetIndividualInternal(rsa->q, &key->q) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa q key error");
        return WOLFSSL_FATAL_ERROR;
    }

#ifndef RSA_LOW_MEM
    if (rsa->dmp1 != NULL &&
        SetIndividualInternal(rsa->dmp1, &key->dP) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa dP key error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (rsa->dmq1 != NULL &&
        SetIndividualInternal(rsa->dmq1, &key->dQ) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa dQ key error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (rsa->iqmp != NULL &&
        SetIndividualInternal(rsa->iqmp, &key->u) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa u key error");
        return WOLFSSL_FATAL_ERROR;
    }
#endif /* !RSA_LOW_MEM */

    rsa->inSet = 1;

    return WOLFSSL_SUCCESS;
}


/* WOLFSSL_SUCCESS on ok */
#ifndef NO_WOLFSSL_STUB
int wolfSSL_RSA_blinding_on(WOLFSSL_RSA* rsa, WOLFSSL_BN_CTX* bn)
{
    (void)rsa;
    (void)bn;
    WOLFSSL_STUB("RSA_blinding_on");
    WOLFSSL_MSG("wolfSSL_RSA_blinding_on");

    return WOLFSSL_SUCCESS;  /* on by default */
}
#endif

/* return compliant with OpenSSL
 *   size of encrypted data if success , -1 if error
 */
int wolfSSL_RSA_public_encrypt(int len, const unsigned char* fr,
                            unsigned char* to, WOLFSSL_RSA* rsa, int padding)
{
    int initTmpRng = 0;
    WC_RNG *rng = NULL;
    int outLen;
    int ret = 0;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG* tmpRNG = NULL;
#else
    WC_RNG  _tmpRNG[1];
    WC_RNG* tmpRNG = _tmpRNG;
#endif
#if !defined(HAVE_FIPS) && !defined(HAVE_USER_RSA) && !defined(HAVE_FAST_RSA)
    int  mgf = WC_MGF1NONE;
    enum wc_HashType hash = WC_HASH_TYPE_NONE;
#endif

    WOLFSSL_MSG("wolfSSL_RSA_public_encrypt");

    /* Check and remap the padding to internal values, if needed. */
#if !defined(HAVE_FIPS) && !defined(HAVE_USER_RSA) && !defined(HAVE_FAST_RSA)
    if (padding == RSA_PKCS1_PADDING)
        padding = WC_RSA_PKCSV15_PAD;
    else if (padding == RSA_PKCS1_OAEP_PADDING) {
        padding = WC_RSA_OAEP_PAD;
        hash = WC_HASH_TYPE_SHA;
        mgf = WC_MGF1SHA1;
    }
    else if (padding == RSA_PKCS1_PSS_PADDING) {
        padding = WC_RSA_PSS_PAD;
        hash = WC_HASH_TYPE_SHA256;
        mgf  = WC_MGF1SHA256;
    }
    else if (padding == RSA_NO_PADDING) {
        padding = WC_RSA_NO_PAD;
    }
#else
    if (padding == RSA_PKCS1_PADDING)
      ;
#endif
    else {
        WOLFSSL_MSG("wolfSSL_RSA_public_encrypt unsupported padding");
        return 0;
    }

    if (rsa->inSet == 0)
    {
        if (SetRsaInternal(rsa) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetRsaInternal failed");
            return 0;
        }
    }

    outLen = wolfSSL_RSA_size(rsa);

    rng = WOLFSSL_RSA_GetRNG(rsa, (WC_RNG**)&tmpRNG, &initTmpRng);

    if (outLen == 0) {
        WOLFSSL_MSG("Bad RSA size");
    }

    if (rng) {
#if !defined(HAVE_FIPS) && !defined(HAVE_USER_RSA) && !defined(HAVE_FAST_RSA)
        ret = wc_RsaPublicEncrypt_ex(fr, len, to, outLen,
                             (RsaKey*)rsa->internal, rng, padding,
                             hash, mgf, NULL, 0);
#else
        ret = wc_RsaPublicEncrypt(fr, len, to, outLen,
                             (RsaKey*)rsa->internal, rng);
#endif
        if (ret <= 0) {
            WOLFSSL_MSG("Bad Rsa Encrypt");
        }
        if (len <= 0) {
            WOLFSSL_MSG("Bad Rsa Encrypt");
        }
    }

    if (initTmpRng)
        wc_FreeRng(tmpRNG);
#ifdef WOLFSSL_SMALL_STACK
    if (tmpRNG)
        XFREE(tmpRNG, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif

    if (ret >= 0)
        WOLFSSL_MSG("wolfSSL_RSA_public_encrypt success");
    else {
        WOLFSSL_MSG("wolfSSL_RSA_public_encrypt failed");
        ret = WOLFSSL_FATAL_ERROR; /* return -1 on error case */
    }
    return ret;
}




/* return compliant with OpenSSL
 *   size of plain recovered data if success , -1 if error
 */
int wolfSSL_RSA_private_decrypt(int len, const unsigned char* fr,
                            unsigned char* to, WOLFSSL_RSA* rsa, int padding)
{
    int outLen;
    int ret = 0;
  #if !defined(HAVE_FIPS) && !defined(HAVE_USER_RSA) && !defined(HAVE_FAST_RSA)
    int mgf = WC_MGF1NONE;
    enum wc_HashType hash = WC_HASH_TYPE_NONE;
  #endif

    WOLFSSL_MSG("wolfSSL_RSA_private_decrypt");

#if !defined(HAVE_FIPS) && !defined(HAVE_USER_RSA) && !defined(HAVE_FAST_RSA)
    if (padding == RSA_PKCS1_PADDING)
        padding = WC_RSA_PKCSV15_PAD;
    else if (padding == RSA_PKCS1_OAEP_PADDING) {
        padding = WC_RSA_OAEP_PAD;
        hash = WC_HASH_TYPE_SHA;
        mgf = WC_MGF1SHA1;
    }
    else if (padding == RSA_PKCS1_PSS_PADDING) {
        padding = WC_RSA_PSS_PAD;
        hash = WC_HASH_TYPE_SHA256;
        mgf  = WC_MGF1SHA256;
    }
    else if (padding == RSA_NO_PADDING) {
        padding = WC_RSA_NO_PAD;
    }
#else
    if (padding == RSA_PKCS1_PADDING)
        ;
#endif
    else {
        WOLFSSL_MSG("wolfSSL_RSA_private_decrypt unsupported padding");
        return 0;
    }

    if (rsa->inSet == 0)
    {
        if (SetRsaInternal(rsa) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetRsaInternal failed");
            return 0;
        }
    }

    outLen = wolfSSL_RSA_size(rsa);
    if (outLen == 0) {
        WOLFSSL_MSG("Bad RSA size");
    }

    /* size of 'to' buffer must be size of RSA key */
#if !defined(HAVE_FIPS) && !defined(HAVE_USER_RSA) && !defined(HAVE_FAST_RSA)
    ret = wc_RsaPrivateDecrypt_ex(fr, len, to, outLen,
                            (RsaKey*)rsa->internal, padding,
                            hash, mgf, NULL, 0);
#else
    ret = wc_RsaPrivateDecrypt(fr, len, to, outLen,
                            (RsaKey*)rsa->internal);
#endif

    if (len <= 0) {
        WOLFSSL_MSG("Bad Rsa Decrypt");
    }

    if (ret > 0)
        WOLFSSL_MSG("wolfSSL_RSA_private_decrypt success");
    else {
        WOLFSSL_MSG("wolfSSL_RSA_private_decrypt failed");
        ret = WOLFSSL_FATAL_ERROR;
    }
    return ret;
}

#if !defined(HAVE_SELFTEST) && (!defined(HAVE_FIPS) || \
    (defined(HAVE_FIPS_VERSION) && HAVE_FIPS_VERSION > 2))
int wolfSSL_RSA_public_decrypt(int flen, const unsigned char* from,
                          unsigned char* to, WOLFSSL_RSA* rsa, int padding)
{
    int tlen = 0;
    int pad_type;

    WOLFSSL_ENTER("wolfSSL_RSA_public_decrypt");

    if (rsa == NULL || rsa->internal == NULL || from == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return WOLFSSL_FAILURE;
    }

    switch (padding) {
    case RSA_PKCS1_PADDING:
        pad_type = WC_RSA_PKCSV15_PAD;
        break;
    case RSA_PKCS1_OAEP_PADDING:
        pad_type = WC_RSA_OAEP_PAD;
        break;
    case RSA_PKCS1_PSS_PADDING:
        pad_type = WC_RSA_PSS_PAD;
        break;
    case RSA_NO_PADDING:
        pad_type = WC_RSA_NO_PAD;
        break;
    default:
        WOLFSSL_MSG("wolfSSL_RSA_public_decrypt unsupported padding");
        return WOLFSSL_FAILURE;
    }

    if (rsa->inSet == 0)
    {
        WOLFSSL_MSG("No RSA internal set, do it");

        if (SetRsaInternal(rsa) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetRsaInternal failed");
            return WOLFSSL_FAILURE;
        }
    }

    /* size of 'to' buffer must be size of RSA key */
    tlen = wc_RsaSSL_Verify_ex(from, flen, to, wolfSSL_RSA_size(rsa),
                               (RsaKey*)rsa->internal, pad_type);
    if (tlen <= 0)
        WOLFSSL_MSG("wolfSSL_RSA_public_decrypt failed");
    else {
        WOLFSSL_MSG("wolfSSL_RSA_public_decrypt success");
    }
    return tlen;
}
#endif /* !defined(HAVE_FIPS) && !defined(HAVE_SELFTEST) */

/* RSA private encrypt calls wc_RsaSSL_Sign. Similar function set up as RSA
 * public decrypt.
 *
 * len  Length of input buffer
 * in   Input buffer to sign
 * out  Output buffer (expected to be greater than or equal to RSA key size)
 * rsa     Key to use for encryption
 * padding Type of RSA padding to use.
 */
int wolfSSL_RSA_private_encrypt(int len, const unsigned char* in,
                            unsigned char* out, WOLFSSL_RSA* rsa, int padding)
{
    int sz = 0;
    WC_RNG* rng = NULL;
#if !defined(WC_RSA_BLINDING) || defined(HAVE_USER_RSA)
    WC_RNG rng_lcl;
#endif
    RsaKey* key;

    WOLFSSL_MSG("wolfSSL_RSA_private_encrypt");

    if (len < 0 || rsa == NULL || rsa->internal == NULL || in == NULL) {
        WOLFSSL_MSG("Bad function arguments");
        return 0;
    }

    if (
    #ifdef WC_RSA_PSS
        padding != RSA_PKCS1_PSS_PADDING &&
    #endif
    #ifdef WC_RSA_NO_PADDING
        padding != RSA_NO_PADDING &&
    #endif
        padding != RSA_PKCS1_PADDING) {
        WOLFSSL_MSG("wolfSSL_RSA_private_encrypt unsupported padding");
        return 0;
    }

    if (rsa->inSet == 0)
    {
        WOLFSSL_MSG("Setting internal RSA structure");

        if (SetRsaInternal(rsa) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetRsaInternal failed");
            return 0;
        }
    }

    key = (RsaKey*)rsa->internal;
#if defined(WC_RSA_BLINDING) && !defined(HAVE_USER_RSA)
    rng = key->rng;
#else
    rng = &rng_lcl;
    #ifndef HAVE_FIPS
    if (wc_InitRng_ex(rng, key->heap, INVALID_DEVID) != 0)
    #else
    if (wc_InitRng(rng) != 0)
    #endif
    {
        WOLFSSL_MSG("Error with random number");
        return SSL_FATAL_ERROR;
    }
#endif

    /* size of output buffer must be size of RSA key */
    switch (padding) {
        case RSA_PKCS1_PADDING:
            sz = wc_RsaSSL_Sign(in, (word32)len, out, wolfSSL_RSA_size(rsa),
                    key, rng);
            break;
    #ifdef WC_RSA_PSS
        case RSA_PKCS1_PSS_PADDING:
            sz = wc_RsaPSS_Sign(in, (word32)len, out, wolfSSL_RSA_size(rsa),
                    WC_HASH_TYPE_NONE, WC_MGF1NONE, key, rng);
            break;
    #endif
    #ifdef WC_RSA_NO_PADDING
        case RSA_NO_PADDING:
        {
            word32 outLen = (word32)len;
            sz = wc_RsaFunction(in, (word32)len, out, &outLen,
                    RSA_PRIVATE_ENCRYPT, key, rng);
            if (sz == 0)
                sz = (int)outLen;
            break;
        }
    #endif
        default:
            sz = BAD_FUNC_ARG;
            break;
    }

    #if !defined(WC_RSA_BLINDING) || defined(HAVE_USER_RSA)
    if (wc_FreeRng(rng) != 0) {
        WOLFSSL_MSG("Error freeing random number generator");
        return SSL_FATAL_ERROR;
    }
    #endif
    if (sz <= 0) {
        WOLFSSL_LEAVE("wolfSSL_RSA_private_encrypt", sz);
        return 0;
    }

    return sz;
}
#endif /* HAVE_USER_RSA */
#endif


/* frees all nodes in the current threads error queue
 *
 * id  thread id. ERR_remove_state is depreciated and id is ignored. The
 *     current threads queue will be free'd.
 */
void wolfSSL_ERR_remove_state(unsigned long id)
{
    WOLFSSL_ENTER("wolfSSL_ERR_remove_state");
    (void)id;
    if (wc_ERR_remove_state() != 0) {
        WOLFSSL_MSG("Error with removing the state");
    }
}


WOLFSSL_BN_CTX* wolfSSL_BN_CTX_new(void)
{
    static int ctx;  /* wolfcrypt doesn't now need ctx */

    WOLFSSL_MSG("wolfSSL_BN_CTX_new");
    return (WOLFSSL_BN_CTX*)&ctx;

}

void wolfSSL_BN_CTX_init(WOLFSSL_BN_CTX* ctx)
{
    (void)ctx;
    WOLFSSL_MSG("wolfSSL_BN_CTX_init");
}


void wolfSSL_BN_CTX_free(WOLFSSL_BN_CTX* ctx)
{
    (void)ctx;
    WOLFSSL_MSG("wolfSSL_BN_CTX_free");
    /* do free since static ctx that does nothing */
}

/* WOLFSSL_SUCCESS on ok */
int wolfSSL_BN_sub(WOLFSSL_BIGNUM* r, const WOLFSSL_BIGNUM* a,
                  const WOLFSSL_BIGNUM* b)
{
    WOLFSSL_MSG("wolfSSL_BN_sub");

    if (r == NULL || a == NULL || b == NULL)
        return 0;

    if (mp_sub((mp_int*)a->internal,(mp_int*)b->internal,
               (mp_int*)r->internal) == MP_OKAY)
        return WOLFSSL_SUCCESS;

    WOLFSSL_MSG("wolfSSL_BN_sub mp_sub failed");
    return 0;
}

/* WOLFSSL_SUCCESS on ok */
int wolfSSL_BN_mod(WOLFSSL_BIGNUM* r, const WOLFSSL_BIGNUM* a,
                  const WOLFSSL_BIGNUM* b, const WOLFSSL_BN_CTX* c)
{
    (void)c;
    WOLFSSL_MSG("wolfSSL_BN_mod");

    if (r == NULL || a == NULL || b == NULL)
        return 0;

    if (mp_mod((mp_int*)a->internal,(mp_int*)b->internal,
               (mp_int*)r->internal) == MP_OKAY)
        return WOLFSSL_SUCCESS;

    WOLFSSL_MSG("wolfSSL_BN_mod mp_mod failed");
    return 0;
}


/* r = (a^p) % m */
int wolfSSL_BN_mod_exp(WOLFSSL_BIGNUM *r, const WOLFSSL_BIGNUM *a,
      const WOLFSSL_BIGNUM *p, const WOLFSSL_BIGNUM *m, WOLFSSL_BN_CTX *ctx)
{
    int ret;

    WOLFSSL_ENTER("wolfSSL_BN_mod_exp");

    (void) ctx;
    if (r == NULL || a == NULL || p == NULL || m == NULL) {
        WOLFSSL_MSG("Bad Argument");
        return WOLFSSL_FAILURE;
    }

    if ((ret = mp_exptmod((mp_int*)a->internal,(mp_int*)p->internal,
               (mp_int*)m->internal, (mp_int*)r->internal)) == MP_OKAY) {
        return WOLFSSL_SUCCESS;
    }

    WOLFSSL_LEAVE("wolfSSL_BN_mod_exp", ret);
    (void)ret;

    return WOLFSSL_FAILURE;
}

/* r = (a * p) % m */
int wolfSSL_BN_mod_mul(WOLFSSL_BIGNUM *r, const WOLFSSL_BIGNUM *a,
        const WOLFSSL_BIGNUM *p, const WOLFSSL_BIGNUM *m, WOLFSSL_BN_CTX *ctx)
{
    int ret;

    WOLFSSL_ENTER("wolfSSL_BN_mod_mul");

    (void) ctx;
    if (r == NULL || a == NULL || p == NULL || m == NULL) {
        WOLFSSL_MSG("Bad Argument");
        return SSL_FAILURE;
    }

    if ((ret = mp_mulmod((mp_int*)a->internal,(mp_int*)p->internal,
               (mp_int*)m->internal, (mp_int*)r->internal)) == MP_OKAY) {
        return WOLFSSL_SUCCESS;
    }

    WOLFSSL_LEAVE("wolfSSL_BN_mod_mul", ret);
    (void)ret;

    return SSL_FAILURE;
}

const WOLFSSL_BIGNUM* wolfSSL_BN_value_one(void)
{
    WOLFSSL_MSG("wolfSSL_BN_value_one");

    if (bn_one == NULL) {
        bn_one = wolfSSL_BN_new();
        if (bn_one) {
            if (mp_set_int((mp_int*)bn_one->internal, 1) != MP_OKAY) {
                /* handle error by freeing BN and returning NULL */
                wolfSSL_BN_free(bn_one);
                bn_one = NULL;
            }
        }
    }

    return bn_one;
}

/* return compliant with OpenSSL
 *   size of BIGNUM in bytes, 0 if error */
int wolfSSL_BN_num_bytes(const WOLFSSL_BIGNUM* bn)
{
    WOLFSSL_ENTER("wolfSSL_BN_num_bytes");

    if (bn == NULL || bn->internal == NULL)
        return WOLFSSL_FAILURE;

    return mp_unsigned_bin_size((mp_int*)bn->internal);
}

/* return compliant with OpenSSL
 *   size of BIGNUM in bits, 0 if error */
int wolfSSL_BN_num_bits(const WOLFSSL_BIGNUM* bn)
{
    WOLFSSL_ENTER("wolfSSL_BN_num_bits");

    if (bn == NULL || bn->internal == NULL)
        return WOLFSSL_FAILURE;

    return mp_count_bits((mp_int*)bn->internal);
}

int wolfSSL_BN_is_negative(const WOLFSSL_BIGNUM* bn)
{
    if (bn == NULL)
        return WOLFSSL_FAILURE;

    return mp_isneg((mp_int*)bn->internal);
}

/* return compliant with OpenSSL
 *   1 if BIGNUM is zero, 0 else */
int wolfSSL_BN_is_zero(const WOLFSSL_BIGNUM* bn)
{
    WOLFSSL_MSG("wolfSSL_BN_is_zero");

    if (bn == NULL || bn->internal == NULL)
        return WOLFSSL_FAILURE;

    if (mp_iszero((mp_int*)bn->internal) == MP_YES)
        return WOLFSSL_SUCCESS;

    return WOLFSSL_FAILURE;
}

/* return compliant with OpenSSL
 *   1 if BIGNUM is one, 0 else */
int wolfSSL_BN_is_one(const WOLFSSL_BIGNUM* bn)
{
    WOLFSSL_MSG("wolfSSL_BN_is_one");

    if (bn == NULL || bn->internal == NULL)
        return WOLFSSL_FAILURE;

    if (mp_cmp_d((mp_int*)bn->internal, 1) == MP_EQ)
        return WOLFSSL_SUCCESS;

    return WOLFSSL_FAILURE;
}

/* return compliant with OpenSSL
 *   1 if BIGNUM is odd, 0 else */
int wolfSSL_BN_is_odd(const WOLFSSL_BIGNUM* bn)
{
    WOLFSSL_MSG("wolfSSL_BN_is_odd");

    if (bn == NULL || bn->internal == NULL)
        return WOLFSSL_FAILURE;

    if (mp_isodd((mp_int*)bn->internal) == MP_YES)
        return WOLFSSL_SUCCESS;

    return WOLFSSL_FAILURE;
}

/* return compliant with OpenSSL
 *   1 if BIGNUM is word, 0 else */
int wolfSSL_BN_is_word(const WOLFSSL_BIGNUM* bn, WOLFSSL_BN_ULONG w)
{
    WOLFSSL_MSG("wolfSSL_BN_is_word");

    if (bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return WOLFSSL_FAILURE;
    }

    if (w <= MP_MASK) {
        if (mp_isword((mp_int*)bn->internal, (mp_digit)w) == MP_YES) {
            return WOLFSSL_SUCCESS;
        }
    } else {
        int ret;
        mp_int w_mp;
        if (mp_init(&w_mp) != MP_OKAY)
            return WOLFSSL_FAILURE;
        if (mp_set_int(&w_mp, w) != MP_OKAY)
            return WOLFSSL_FAILURE;
        ret = mp_cmp((mp_int *)bn->internal, &w_mp);
        mp_free(&w_mp);
        if (ret == MP_EQ)
            return WOLFSSL_SUCCESS;
    }

    return WOLFSSL_FAILURE;
}

/* return compliant with OpenSSL
 *   -1 if a < b, 0 if a == b and 1 if a > b
 */
int wolfSSL_BN_cmp(const WOLFSSL_BIGNUM* a, const WOLFSSL_BIGNUM* b)
{
    int ret;

    WOLFSSL_MSG("wolfSSL_BN_cmp");

    if (a == NULL || a->internal == NULL || b == NULL || b->internal == NULL)
        return WOLFSSL_FATAL_ERROR;

    ret = mp_cmp((mp_int*)a->internal, (mp_int*)b->internal);

    return (ret == MP_EQ ? 0 : (ret == MP_GT ? 1 : -1));
}

/* return compliant with OpenSSL
 *   length of BIGNUM in bytes, -1 if error */
int wolfSSL_BN_bn2bin(const WOLFSSL_BIGNUM* bn, unsigned char* r)
{
    WOLFSSL_MSG("wolfSSL_BN_bn2bin");

    if (bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("NULL bn error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (r == NULL)
        return mp_unsigned_bin_size((mp_int*)bn->internal);

    if (mp_to_unsigned_bin((mp_int*)bn->internal, r) != MP_OKAY) {
        WOLFSSL_MSG("mp_to_unsigned_bin error");
        return WOLFSSL_FATAL_ERROR;
    }

    return mp_unsigned_bin_size((mp_int*)bn->internal);
}


WOLFSSL_BIGNUM* wolfSSL_BN_bin2bn(const unsigned char* str, int len,
                            WOLFSSL_BIGNUM* ret)
{
    int weOwn = 0;

    WOLFSSL_MSG("wolfSSL_BN_bin2bn");

    /* if ret is null create a BN */
    if (ret == NULL) {
        ret = wolfSSL_BN_new();
        weOwn = 1;
        if (ret == NULL)
            return NULL;
    }

    /* check ret and ret->internal then read in value */
    if (ret && ret->internal) {
        if (mp_read_unsigned_bin((mp_int*)ret->internal, str, len) != 0) {
            WOLFSSL_MSG("mp_read_unsigned_bin failure");
            if (weOwn)
                wolfSSL_BN_free(ret);
            return NULL;
        }
    } else {
        /* This may be overly defensive */
        if (weOwn)
            wolfSSL_BN_free(ret);
        return NULL;
    }

    return ret;
}

/* return compliant with OpenSSL
 *   1 if success, 0 if error */
#ifndef NO_WOLFSSL_STUB
int wolfSSL_mask_bits(WOLFSSL_BIGNUM* bn, int n)
{
    (void)bn;
    (void)n;
    WOLFSSL_ENTER("wolfSSL_BN_mask_bits");
    WOLFSSL_STUB("BN_mask_bits");
    return SSL_FAILURE;
}
#endif


/* WOLFSSL_SUCCESS on ok */
int wolfSSL_BN_rand(WOLFSSL_BIGNUM* bn, int bits, int top, int bottom)
{
    int           ret    = 0;
    int           len;
    int           initTmpRng = 0;
    WC_RNG*       rng    = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG*       tmpRNG = NULL;
    byte*         buff   = NULL;
#else
    WC_RNG        tmpRNG[1];
    byte          buff[1024];
#endif

    (void)top;
    (void)bottom;
    WOLFSSL_MSG("wolfSSL_BN_rand");

    if (bits <= 0) {
        return WOLFSSL_FAILURE;
    }

    len = bits / 8;
    if (bits % 8)
        len++;

    /* has to be a length of at least 1 since we set buf[0] and buf[len-1] */
    if (len < 1) {
        return WOLFSSL_FAILURE;
    }

#ifdef WOLFSSL_SMALL_STACK
    buff   = (byte*)XMALLOC(1024,        NULL, DYNAMIC_TYPE_TMP_BUFFER);
    tmpRNG = (WC_RNG*) XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
    if (buff == NULL || tmpRNG == NULL) {
        XFREE(buff,   NULL, DYNAMIC_TYPE_TMP_BUFFER);
        XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
        return ret;
    }
#endif

    if (bn == NULL || bn->internal == NULL)
        WOLFSSL_MSG("Bad function arguments");
    else if (wc_InitRng(tmpRNG) == 0) {
        rng = tmpRNG;
        initTmpRng = 1;
    }
    else if (initGlobalRNG)
        rng = &globalRNG;

    if (rng) {
        if (wc_RNG_GenerateBlock(rng, buff, len) != 0)
            WOLFSSL_MSG("Bad wc_RNG_GenerateBlock");
        else {
            buff[0]     |= 0x80 | 0x40;
            buff[len-1] |= 0x01;

            if (mp_read_unsigned_bin((mp_int*)bn->internal,buff,len) != MP_OKAY)
                WOLFSSL_MSG("mp read bin failed");
            else
                ret = WOLFSSL_SUCCESS;
        }
    }

    if (initTmpRng)
        wc_FreeRng(tmpRNG);

#ifdef WOLFSSL_SMALL_STACK
    XFREE(buff,   NULL, DYNAMIC_TYPE_TMP_BUFFER);
    XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif

    return ret;
}


/* WOLFSSL_SUCCESS on ok
 * code is same as wolfSSL_BN_rand except for how top and bottom is handled.
 * top -1 then leave most sig bit alone
 * top 0 then most sig is set to 1
 * top is 1 then first two most sig bits are 1
 *
 * bottom is hot then odd number */
int wolfSSL_BN_pseudo_rand(WOLFSSL_BIGNUM* bn, int bits, int top, int bottom)
{
    int           ret    = 0;
    int           len;
    int           initTmpRng = 0;
    WC_RNG*       rng    = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG*       tmpRNG = NULL;
    byte*         buff   = NULL;
#else
    WC_RNG        tmpRNG[1];
    byte          buff[1024];
#endif

    WOLFSSL_ENTER("wolfSSL_BN_pseudo_rand");

    if (bits <= 0) {
        return WOLFSSL_FAILURE;
    }

    len = bits / 8;
    if (bits % 8)
        len++;

    /* has to be a length of at least 1 since we set buf[0] and buf[len-1] */
    if (top == 1 || top == 0 || bottom == 1) {
        if (len < 1) {
            return WOLFSSL_FAILURE;
        }
    }

#ifdef WOLFSSL_SMALL_STACK
    buff   = (byte*)XMALLOC(1024,        NULL, DYNAMIC_TYPE_TMP_BUFFER);
    tmpRNG = (WC_RNG*) XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (buff == NULL || tmpRNG == NULL) {
        XFREE(buff,   NULL, DYNAMIC_TYPE_TMP_BUFFER);
        XFREE(tmpRNG, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        return ret;
    }
#endif

    if (bn == NULL || bn->internal == NULL)
        WOLFSSL_MSG("Bad function arguments");
    else if (wc_InitRng(tmpRNG) == 0) {
        rng = tmpRNG;
        initTmpRng = 1;
    }
    else if (initGlobalRNG)
        rng = &globalRNG;

    if (rng) {
        if (wc_RNG_GenerateBlock(rng, buff, len) != 0)
            WOLFSSL_MSG("Bad wc_RNG_GenerateBlock");
        else {
            switch (top) {
                case -1:
                    break;

                case 0:
                    buff[0] |= 0x80;
                    break;

                case 1:
                    buff[0] |= 0x80 | 0x40;
                    break;
            }

            if (bottom == 1) {
                buff[len-1] |= 0x01;
            }

            if (mp_read_unsigned_bin((mp_int*)bn->internal,buff,len) != MP_OKAY)
                WOLFSSL_MSG("mp read bin failed");
            else
                ret = WOLFSSL_SUCCESS;
        }
    }

    if (initTmpRng)
        wc_FreeRng(tmpRNG);

#ifdef WOLFSSL_SMALL_STACK
    XFREE(buff,   NULL, DYNAMIC_TYPE_TMP_BUFFER);
    XFREE(tmpRNG, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif

    return ret;
}

/* return code compliant with OpenSSL :
 *   1 if bit set, 0 else
 */
int wolfSSL_BN_is_bit_set(const WOLFSSL_BIGNUM* bn, int n)
{
    if (bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return WOLFSSL_FAILURE;
    }

    return mp_is_bit_set((mp_int*)bn->internal, (mp_digit)n);
}

/* return code compliant with OpenSSL :
 *   1 if success, 0 else
 */
int wolfSSL_BN_set_bit(WOLFSSL_BIGNUM* bn, int n)
{
    if (bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return WOLFSSL_FAILURE;
    }

    if (mp_set_bit((mp_int*)bn->internal, n) != MP_OKAY) {
        WOLFSSL_MSG("mp_set_bit error");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}


int wolfSSL_BN_clear_bit(WOLFSSL_BIGNUM* bn, int n)
{
    int ret = WOLFSSL_FAILURE;
#ifndef WOLFSSL_SMALL_STACK
    mp_int tmp[1];
#else
    mp_int* tmp = NULL;
#endif

    if (bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        goto end;
    }
    if (mp_is_bit_set((mp_int*)bn->internal, n)) {
#ifdef WOLFSSL_SMALL_STACK
       tmp = (mp_int*)XMALLOC(sizeof(mp_int), NULL, DYNAMIC_TYPE_BIGINT);
       if (tmp == NULL) {
           goto end;
       }
#endif
        if (mp_init(tmp) != MP_OKAY) {
            goto end;
        }
        if (mp_set_bit(tmp, n) != MP_OKAY) {
            goto cleanup;
        }
        if (mp_sub((mp_int*)bn->internal, tmp, (mp_int*)bn->internal) != MP_OKAY) {
            goto cleanup;
        }
    } else {
        goto end;
    }

    ret = WOLFSSL_SUCCESS;
cleanup:
    mp_clear(tmp);

end:
#ifdef WOLFSSL_SMALL_STACK
    if (tmp)
        XFREE(tmp, NULL, DYNAMIC_TYPE_BIGINT);
#endif
    return ret;
}


/* WOLFSSL_SUCCESS on ok */
/* Note on use: this function expects str to be an even length. It is
 * converting pairs of bytes into 8-bit values. As an example, the RSA
 * public exponent is commonly 0x010001. To get it to convert, you need
 * to pass in the string "010001", it will fail if you use "10001". This
 * is an affect of how Base16_Decode() works.
 */
int wolfSSL_BN_hex2bn(WOLFSSL_BIGNUM** bn, const char* str)
{
    int     ret     = 0;
    word32  decSz   = 1024;
#ifdef WOLFSSL_SMALL_STACK
    byte*   decoded;
#else
    byte    decoded[1024];
#endif
    int     weOwn = 0;
    int     strLen;

    WOLFSSL_MSG("wolfSSL_BN_hex2bn");

#ifdef WOLFSSL_SMALL_STACK
    decoded = (byte*)XMALLOC(decSz, NULL, DYNAMIC_TYPE_DER);
    if (decoded == NULL)
        return ret;
#endif

    if (str == NULL || str[0] == '\0') {
        WOLFSSL_MSG("Bad function argument");
        ret = WOLFSSL_FAILURE;
    } else {
        strLen = (int)XSTRLEN(str);
        /* ignore trailing new lines */
        while (str[strLen-1] == '\n' && strLen > 0) strLen--;

        if (Base16_Decode((byte*)str, strLen, decoded, &decSz) < 0)
            WOLFSSL_MSG("Bad Base16_Decode error");
        else if (bn == NULL)
            ret = decSz;
        else {
            if (*bn == NULL) {
                *bn = wolfSSL_BN_new();
                if (*bn != NULL) {
                    weOwn = 1;
                }
            }

            if (*bn == NULL)
                WOLFSSL_MSG("BN new failed");
            else if (wolfSSL_BN_bin2bn(decoded, decSz, *bn) == NULL) {
                WOLFSSL_MSG("Bad bin2bn error");
                if (weOwn == 1) {
                    wolfSSL_BN_free(*bn); /* Free new BN */
                }
            }
            else
                ret = WOLFSSL_SUCCESS;
        }
    }

#ifdef WOLFSSL_SMALL_STACK
    XFREE(decoded, NULL, DYNAMIC_TYPE_DER);
#endif

    return ret;
}


WOLFSSL_BIGNUM* wolfSSL_BN_dup(const WOLFSSL_BIGNUM* bn)
{
    WOLFSSL_BIGNUM* ret;

    WOLFSSL_MSG("wolfSSL_BN_dup");

    if (bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return NULL;
    }

    ret = wolfSSL_BN_new();
    if (ret == NULL) {
        WOLFSSL_MSG("bn new error");
        return NULL;
    }

    if (mp_copy((mp_int*)bn->internal, (mp_int*)ret->internal) != MP_OKAY) {
        WOLFSSL_MSG("mp_copy error");
        wolfSSL_BN_free(ret);
        return NULL;
    }

    ret->neg = bn->neg;

    return ret;
}


WOLFSSL_BIGNUM* wolfSSL_BN_copy(WOLFSSL_BIGNUM* r, const WOLFSSL_BIGNUM* bn)
{
    WOLFSSL_MSG("wolfSSL_BN_copy");

    if (r == NULL || bn == NULL) {
        WOLFSSL_MSG("r or bn NULL error");
        return NULL;
    }

    if (mp_copy((mp_int*)bn->internal, (mp_int*)r->internal) != MP_OKAY) {
        WOLFSSL_MSG("mp_copy error");
        return NULL;
    }

    r->neg = bn->neg;

    return r;
}

/* return code compliant with OpenSSL :
 *   1 if success, 0 else
 */
int wolfSSL_BN_set_word(WOLFSSL_BIGNUM* bn, unsigned long w)
{
    WOLFSSL_MSG("wolfSSL_BN_set_word");

    if (bn == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return WOLFSSL_FAILURE;
    }

    if (mp_set_int((mp_int*)bn->internal, w) != MP_OKAY) {
        WOLFSSL_MSG("mp_init_set_int error");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

static WOLFSSL_BN_ULONG wolfSSL_BN_get_word_1(mp_int *mp) {
#if DIGIT_BIT == (SIZEOF_LONG * 8)
    return (WOLFSSL_BN_ULONG)mp->dp[0];
#else
    WOLFSSL_BN_ULONG ret = 0UL;
    int digit_i;

    for (digit_i = 0; digit_i < mp->used; ++digit_i) {
        ret <<= (WOLFSSL_BN_ULONG)DIGIT_BIT;
        ret |= (WOLFSSL_BN_ULONG)mp->dp[digit_i];
    }

    return ret;
#endif
}

/* Returns the big number as an unsigned long if possible.
 *
 * bn  big number structure to get value from
 *
 * Returns value or 0xFFFFFFFFL if bigger than unsigned long.
 */
WOLFSSL_BN_ULONG wolfSSL_BN_get_word(const WOLFSSL_BIGNUM* bn)
{
    WOLFSSL_MSG("wolfSSL_BN_get_word");

    if (bn == NULL) {
        WOLFSSL_MSG("Invalid argument");
        return 0;
    }

    if (wolfSSL_BN_num_bytes(bn) > (int)sizeof(unsigned long)) {
        WOLFSSL_MSG("bignum is larger than unsigned long");
        return 0xFFFFFFFFL;
    }

    return wolfSSL_BN_get_word_1((mp_int*)bn->internal);
}

/* return code compliant with OpenSSL :
 *   number length in decimal if success, 0 if error
 */
#ifndef NO_WOLFSSL_STUB
int wolfSSL_BN_dec2bn(WOLFSSL_BIGNUM** bn, const char* str)
{
    (void)bn;
    (void)str;

    WOLFSSL_MSG("wolfSSL_BN_dec2bn");
    WOLFSSL_STUB("BN_dec2bn");
    return SSL_FAILURE;
}
#endif

#if defined(WOLFSSL_KEY_GEN) || defined(HAVE_COMP_KEY)
char *wolfSSL_BN_bn2dec(const WOLFSSL_BIGNUM *bn)
{
    int len = 0;
    char *buf;

    WOLFSSL_MSG("wolfSSL_BN_bn2dec");

    if (bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return NULL;
    }

    if (mp_radix_size((mp_int*)bn->internal, MP_RADIX_DEC, &len) != MP_OKAY) {
        WOLFSSL_MSG("mp_radix_size failure");
        return NULL;
    }

    buf = (char*) XMALLOC(len, NULL, DYNAMIC_TYPE_OPENSSL);
    if (buf == NULL) {
        WOLFSSL_MSG("BN_bn2dec malloc buffer failure");
        return NULL;
    }

    if (mp_todecimal((mp_int*)bn->internal, buf) != MP_OKAY) {
        XFREE(buf, NULL, DYNAMIC_TYPE_ECC);
        return NULL;
    }

    return buf;
}
#else
char* wolfSSL_BN_bn2dec(const WOLFSSL_BIGNUM* bn)
{
    (void)bn;

    WOLFSSL_MSG("wolfSSL_BN_bn2dec");

    return NULL;
}
#endif /* defined(WOLFSSL_KEY_GEN) || defined(HAVE_COMP_KEY) */

/* return code compliant with OpenSSL :
 *   1 if success, 0 else
 */
int wolfSSL_BN_lshift(WOLFSSL_BIGNUM *r, const WOLFSSL_BIGNUM *bn, int n)
{
    WOLFSSL_MSG("wolfSSL_BN_lshift");

    if (r == NULL || r->internal == NULL || bn == NULL || bn->internal == NULL){
        WOLFSSL_MSG("bn NULL error");
        return WOLFSSL_FAILURE;
    }

    if (mp_mul_2d((mp_int*)bn->internal, n, (mp_int*)r->internal) != MP_OKAY) {
        WOLFSSL_MSG("mp_mul_2d error");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

/* return code compliant with OpenSSL :
 *   1 if success, 0 else
 */
int wolfSSL_BN_rshift(WOLFSSL_BIGNUM *r, const WOLFSSL_BIGNUM *bn, int n)
{
    WOLFSSL_MSG("wolfSSL_BN_rshift");

    if (r == NULL || r->internal == NULL || bn == NULL || bn->internal == NULL){
        WOLFSSL_MSG("bn NULL error");
        return WOLFSSL_FAILURE;
    }

    if (mp_div_2d((mp_int*)bn->internal, n,
                  (mp_int*)r->internal, NULL) != MP_OKAY) {
        WOLFSSL_MSG("mp_mul_2d error");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

/* return code compliant with OpenSSL :
 *   1 if success, 0 else
 */
int wolfSSL_BN_add_word(WOLFSSL_BIGNUM *bn, WOLFSSL_BN_ULONG w)
{
    WOLFSSL_MSG("wolfSSL_BN_add_word");

    if (bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return WOLFSSL_FAILURE;
    }

    if (w <= MP_MASK) {
        if (mp_add_d((mp_int*)bn->internal, (mp_digit)w, (mp_int*)bn->internal) != MP_OKAY) {
            WOLFSSL_MSG("mp_add_d error");
            return WOLFSSL_FAILURE;
        }
    } else {
        int ret;
        mp_int w_mp;
        if (mp_init(&w_mp) != MP_OKAY)
            return WOLFSSL_FAILURE;
        if (mp_set_int(&w_mp, w) != MP_OKAY)
            return WOLFSSL_FAILURE;
        ret = mp_add((mp_int *)bn->internal, &w_mp, (mp_int *)bn->internal);
        mp_free(&w_mp);
        if (ret != MP_OKAY) {
            WOLFSSL_MSG("mp_add error");
            return WOLFSSL_FAILURE;
        }
    }

    return WOLFSSL_SUCCESS;
}

/* return code compliant with OpenSSL :
 *   1 if success, 0 else
 */
int wolfSSL_BN_add(WOLFSSL_BIGNUM *r, WOLFSSL_BIGNUM *a, WOLFSSL_BIGNUM *b)
{
    WOLFSSL_MSG("wolfSSL_BN_add");

    if (r == NULL || r->internal == NULL || a == NULL || a->internal == NULL ||
        b == NULL || b->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return WOLFSSL_FAILURE;
    }

    if (mp_add((mp_int*)a->internal, (mp_int*)b->internal,
               (mp_int*)r->internal) != MP_OKAY) {
        WOLFSSL_MSG("mp_add_d error");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

/* r = a + b (mod m) */
int wolfSSL_BN_mod_add(WOLFSSL_BIGNUM *r, const WOLFSSL_BIGNUM *a,
                       const WOLFSSL_BIGNUM *b, const WOLFSSL_BIGNUM *m,
                       WOLFSSL_BN_CTX *ctx)
{
    (void)ctx;
    WOLFSSL_MSG("wolfSSL_BN_add");

    if (r == NULL || r->internal == NULL ||
            a == NULL || a->internal == NULL ||
            b == NULL || b->internal == NULL ||
            m == NULL || m->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return WOLFSSL_FAILURE;
    }

    if (mp_addmod((mp_int*)a->internal, (mp_int*)b->internal,
                  (mp_int*)m->internal, (mp_int*)r->internal) != MP_OKAY) {
        WOLFSSL_MSG("mp_add_d error");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

#ifdef WOLFSSL_KEY_GEN

/* return code compliant with OpenSSL :
 *   1 if prime, 0 if not, -1 if error
 */
int wolfSSL_BN_is_prime_ex(const WOLFSSL_BIGNUM *bn, int nbchecks,
                           WOLFSSL_BN_CTX *ctx, WOLFSSL_BN_GENCB *cb)
{
    WC_RNG*        rng    = NULL;
#ifdef WOLFSSL_SMALL_STACK
    WC_RNG*        tmpRNG = NULL;
#else
    WC_RNG         tmpRNG[1];
#endif
    int            initTmpRng = 0;
    int            res = MP_NO;

    (void)ctx;
    (void)cb;

    WOLFSSL_MSG("wolfSSL_BN_is_prime_ex");

    if (bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

#ifdef WOLFSSL_SMALL_STACK
    tmpRNG = (WC_RNG*)XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
    if (tmpRNG == NULL)
        return WOLFSSL_FAILURE;
#endif
    if (wc_InitRng(tmpRNG) == 0) {
        rng = tmpRNG;
        initTmpRng = 1;
    }
    else {
        WOLFSSL_MSG("Bad RNG Init, trying global");
        if (initGlobalRNG == 0) {
            WOLFSSL_MSG("Global RNG no Init");
        }
        else
            rng = &globalRNG;
    }

    if (rng) {
        if (mp_prime_is_prime_ex((mp_int*)bn->internal,
                                 nbchecks, &res, rng) != MP_OKAY) {
            WOLFSSL_MSG("mp_prime_is_prime_ex error");
            res = MP_NO;
        }
    }

    if (initTmpRng)
        wc_FreeRng(tmpRNG);
#ifdef WOLFSSL_SMALL_STACK
    XFREE(tmpRNG, NULL, DYNAMIC_TYPE_RNG);
#endif

    if (res != MP_YES) {
        WOLFSSL_MSG("mp_prime_is_prime_ex not prime");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

/* return code compliant with OpenSSL :
 *   (bn mod w) if success, -1 if error
 */
WOLFSSL_BN_ULONG wolfSSL_BN_mod_word(const WOLFSSL_BIGNUM *bn,
                                     WOLFSSL_BN_ULONG w)
{
    WOLFSSL_BN_ULONG ret = 0;

    WOLFSSL_MSG("wolfSSL_BN_mod_word");

    if (bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return (WOLFSSL_BN_ULONG)WOLFSSL_FATAL_ERROR;
    }

    if (w <= MP_MASK) {
        mp_digit bn_ret;
        if (mp_mod_d((mp_int*)bn->internal, (WOLFSSL_BN_ULONG)w, &bn_ret) != MP_OKAY) {
            WOLFSSL_MSG("mp_add_d error");
            return (WOLFSSL_BN_ULONG)WOLFSSL_FATAL_ERROR;
        }
        ret = (WOLFSSL_BN_ULONG)bn_ret;
    } else {
        int mp_ret;
        mp_int w_mp, r_mp;
        if (mp_init(&w_mp) != MP_OKAY)
            return (unsigned long)WOLFSSL_FAILURE;
        if (mp_init(&r_mp) != MP_OKAY)
            return (unsigned long)WOLFSSL_FAILURE;
        if (mp_set_int(&w_mp, w) != MP_OKAY)
            return (unsigned long)WOLFSSL_FAILURE;
        mp_ret = mp_mod((mp_int *)bn->internal, &w_mp, &r_mp);
        ret = wolfSSL_BN_get_word_1(&r_mp);
        mp_free(&r_mp);
        mp_free(&w_mp);
        if (mp_ret != MP_OKAY) {
            WOLFSSL_MSG("mp_mod error");
            return (WOLFSSL_BN_ULONG)WOLFSSL_FAILURE;
        }
    }

    return ret;
}
#endif /* #ifdef WOLFSSL_KEY_GEN */

char *wolfSSL_BN_bn2hex(const WOLFSSL_BIGNUM *bn)
{
    int len = 0;
    char *buf;

    WOLFSSL_ENTER("wolfSSL_BN_bn2hex");

    if (bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return NULL;
    }

    if (mp_radix_size((mp_int*)bn->internal, MP_RADIX_HEX, &len) != MP_OKAY) {
        WOLFSSL_MSG("mp_radix_size failure");
        return NULL;
    }

    buf = (char*)XMALLOC(len, NULL, DYNAMIC_TYPE_OPENSSL);
    if (buf == NULL) {
        WOLFSSL_MSG("BN_bn2hex malloc buffer failure");
        return NULL;
    }

    if (mp_tohex((mp_int*)bn->internal, buf) != MP_OKAY) {
        XFREE(buf, NULL, DYNAMIC_TYPE_OPENSSL);
        return NULL;
    }

    return buf;
}

#ifndef NO_FILESYSTEM
/* return code compliant with OpenSSL :
 *   1 if success, 0 if error
 */
int wolfSSL_BN_print_fp(XFILE fp, const WOLFSSL_BIGNUM *bn)
{
    char *buf;

    WOLFSSL_ENTER("wolfSSL_BN_print_fp");

    if (fp == XBADFILE || bn == NULL || bn->internal == NULL) {
        WOLFSSL_MSG("bn NULL error");
        return WOLFSSL_FAILURE;
    }

    buf = wolfSSL_BN_bn2hex(bn);
    if (buf == NULL) {
        WOLFSSL_MSG("wolfSSL_BN_bn2hex failure");
        return WOLFSSL_FAILURE;
    }

    XFPRINTF(fp, "%s", buf);
    XFREE(buf, NULL, DYNAMIC_TYPE_OPENSSL);

    return WOLFSSL_SUCCESS;
}
#endif /* !NO_FILESYSTEM */


WOLFSSL_BIGNUM *wolfSSL_BN_CTX_get(WOLFSSL_BN_CTX *ctx)
{
    /* ctx is not used, return new Bignum */
    (void)ctx;

    WOLFSSL_ENTER("wolfSSL_BN_CTX_get");

    return wolfSSL_BN_new();
}

#ifndef NO_WOLFSSL_STUB
void wolfSSL_BN_CTX_start(WOLFSSL_BN_CTX *ctx)
{
    (void)ctx;

    WOLFSSL_ENTER("wolfSSL_BN_CTX_start");
    WOLFSSL_STUB("BN_CTX_start");
    WOLFSSL_MSG("wolfSSL_BN_CTX_start TBD");
}
#endif


WOLFSSL_BIGNUM *wolfSSL_BN_mod_inverse(WOLFSSL_BIGNUM *r,
                                       WOLFSSL_BIGNUM *a,
                                       const WOLFSSL_BIGNUM *n,
                                       WOLFSSL_BN_CTX *ctx)
{
    int dynamic = 0;

    /* ctx is not used */
    (void)ctx;

    WOLFSSL_ENTER("wolfSSL_BN_mod_inverse");

    /* check parameter */
    if (r == NULL) {
        r = wolfSSL_BN_new();
        if (r == NULL){
            WOLFSSL_MSG("WolfSSL_BN_new() failed");
            return NULL;
        }
        dynamic = 1;
    }

    if (a == NULL) {
        WOLFSSL_MSG("a NULL error");
        if (dynamic == 1) {
            wolfSSL_BN_free(r);
        }
        return NULL;
    }

    if (n == NULL) {
        WOLFSSL_MSG("n NULL error");
        if (dynamic == 1) {
            wolfSSL_BN_free(r);
        }
        return NULL;
    }

    /* Compute inverse of a modulo n and return r */
    if (mp_invmod((mp_int *)a->internal,(mp_int *)n->internal,
                  (mp_int*)r->internal) == MP_VAL){
        WOLFSSL_MSG("mp_invmod() error");
        if (dynamic == 1) {
            wolfSSL_BN_free(r);
        }
        return NULL;
    }

    return  r;
}
#endif  /* OPENSSL_EXTRA */
#if (defined(WOLFSSL_QT) || defined(OPENSSL_ALL)) && !defined(NO_ASN)
#ifndef NO_BIO
static int unprintable_char(char c)
{
    const unsigned char last_unprintable = 31;
    const unsigned char LF = 10;
    const unsigned char CR = 13;

    if (c <= last_unprintable && c != LF && c != CR) {
        return 1;
    }
    return 0;
}

int wolfSSL_ASN1_STRING_print(WOLFSSL_BIO *out, WOLFSSL_ASN1_STRING *str)
{
    int i;

    WOLFSSL_ENTER("wolfSSL_ASN1_STRING_print");
    if (out == NULL || str == NULL)
           return WOLFSSL_FAILURE;

    for (i=0; i < str->length; i++) {
        if (unprintable_char(str->data[i])) {
            str->data[i] = '.';
        }
    }

    if (wolfSSL_BIO_write(out, str->data, str->length) != str->length){
        return WOLFSSL_FAILURE;
    }

    return str->length;
}
#endif /* !NO_BIO */
#endif /* (WOLFSSL_QT || OPENSSL_ALL) && !NO_ASN */

#if defined(OPENSSL_EXTRA)
int wolfSSL_X509_check_ca(WOLFSSL_X509 *x509)
{
    WOLFSSL_ENTER("X509_check_ca");

    if (x509 == NULL)
        return WOLFSSL_FAILURE;
    if (x509->isCa)
        return 1;
    if (x509->extKeyUsageCrit)
        return 4;

    return 0;
}


const char *wolfSSL_ASN1_tag2str(int tag)
{
    static const char *const tag_label[31] = {
        "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", "NULL",
        "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", "ENUMERATED",
        "<ASN1 11>", "UTF8STRING", "<ASN1 13>", "<ASN1 14>", "<ASN1 15>",
        "SEQUENCE", "SET", "NUMERICSTRING", "PRINTABLESTRING", "T61STRING",
        "VIDEOTEXTSTRING", "IA5STRING", "UTCTIME", "GENERALIZEDTIME",
        "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", "UNIVERSALSTRING",
        "<ASN1 29>", "BMPSTRING"
    };

    if ((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
        tag &= ~0x100;
    if (tag < 0 || tag > 30)
        return "(unknown)";
    return tag_label[tag];
}

#ifndef NO_BIO
static int check_esc_char(char c, char *esc)
{
    char *ptr;

    ptr = esc;
    while(*ptr != 0){
        if (c == *ptr)
            return 1;
        ptr++;
    }
    return 0;
}

int wolfSSL_ASN1_STRING_print_ex(WOLFSSL_BIO *out, WOLFSSL_ASN1_STRING *str,
                                 unsigned long flags)
{
    size_t str_len = 0, type_len = 0;
    unsigned char *typebuf = NULL;
    const char *hash="#";

    WOLFSSL_ENTER("wolfSSL_ASN1_STRING_PRINT_ex");
    if (out == NULL || str == NULL)
        return WOLFSSL_FAILURE;

    /* add ASN1 type tag */
    if (flags & ASN1_STRFLGS_SHOW_TYPE){
        const char *tag = wolfSSL_ASN1_tag2str(str->type);
        /* colon len + tag len + null*/
        type_len = XSTRLEN(tag) + 2;
        typebuf = (unsigned char *)XMALLOC(type_len , NULL, DYNAMIC_TYPE_TMP_BUFFER);
        if (typebuf == NULL){
            WOLFSSL_MSG("memory alloc failed.");
            return WOLFSSL_FAILURE;
        }
        XMEMSET(typebuf, 0, type_len);
        XSNPRINTF((char*)typebuf, (size_t)type_len , "%s:", tag);
        type_len--;
    }

    /* dump hex */
    if (flags & ASN1_STRFLGS_DUMP_ALL){
        static const char hex_char[] = { '0', '1', '2', '3', '4', '5', '6',
                                         '7','8', '9', 'A', 'B', 'C', 'D',
                                         'E', 'F' };
        char hex_tmp[4];
        char *str_ptr, *str_end;

        if (type_len > 0){
            if (wolfSSL_BIO_write(out, typebuf, (int)type_len) != (int)type_len){
                XFREE(typebuf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
                return WOLFSSL_FAILURE;
            }
            str_len += type_len;
        }
        if (wolfSSL_BIO_write(out, hash, 1) != 1){
            goto err_exit;
        }
        str_len++;
        if (flags & ASN1_STRFLGS_DUMP_DER){
            hex_tmp[0] = hex_char[(str->type & 0xf0) >> 4];
            hex_tmp[1] = hex_char[(str->type & 0x0f)];
            hex_tmp[2] = hex_char[(str->length & 0xf0) >> 4];
            hex_tmp[3] = hex_char[(str->length & 0x0f)];
            if (wolfSSL_BIO_write(out, hex_tmp, 4) != 4){
                goto err_exit;
            }
            str_len += 4;
            XMEMSET(hex_tmp, 0, 4);
        }

        str_ptr = str->data;
        str_end = str->data + str->length;
        while (str_ptr < str_end){
            hex_tmp[0] = hex_char[*str_ptr >> 4];
            hex_tmp[1] = hex_char[*str_ptr & 0xf];
            if (wolfSSL_BIO_write(out, hex_tmp, 2) != 2){
                goto err_exit;
            }
            str_ptr++;
            str_len += 2;
        }
        if (type_len > 0)
            XFREE(typebuf, NULL, DYNAMIC_TYPE_TMP_BUFFER);

        return (int)str_len;
    }

    if (type_len > 0){
        if (wolfSSL_BIO_write(out, typebuf, (int)type_len) != (int)type_len){
            XFREE(typebuf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            return WOLFSSL_FAILURE;
        }
        str_len += type_len;
    }

    if (flags & ASN1_STRFLGS_ESC_2253){
        char esc_ch[] = "+;<>\\";
        char* esc_ptr;

        esc_ptr = str->data;
        while (*esc_ptr != 0){
            if (check_esc_char(*esc_ptr, esc_ch)){
                if (wolfSSL_BIO_write(out,"\\", 1) != 1)
                    goto err_exit;
                str_len++;
            }
            if (wolfSSL_BIO_write(out, esc_ptr, 1) != 1)
                goto err_exit;
            str_len++;
            esc_ptr++;
        }
        if (type_len > 0)
            XFREE(typebuf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        return (int)str_len;
    }

    if (wolfSSL_BIO_write(out, str->data, str->length) != str->length){
        goto err_exit;
    }
    str_len += str->length;
    if (type_len > 0)
        XFREE(typebuf, NULL, DYNAMIC_TYPE_TMP_BUFFER);

    return (int)str_len;

err_exit:
    if (type_len > 0)
        XFREE(typebuf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    return WOLFSSL_FAILURE;
}
#endif /* !NO_BIO */

#if !defined(NO_ASN_TIME) && !defined(USER_TIME) && !defined(TIME_OVERRIDES)


WOLFSSL_ASN1_TIME* wolfSSL_ASN1_TIME_adj(WOLFSSL_ASN1_TIME *s, time_t t,
                                    int offset_day, long offset_sec)
{
    const time_t sec_per_day = 24*60*60;
    struct tm* ts = NULL;
    struct tm* tmpTime;
    time_t t_adj = 0;
    time_t offset_day_sec = 0;
#if defined(NEED_TMP_TIME)
    struct tm tmpTimeStorage;

    tmpTime = &tmpTimeStorage;
#else
    tmpTime = NULL;
#endif
    (void)tmpTime;

    WOLFSSL_ENTER("wolfSSL_ASN1_TIME_adj");

    if (s == NULL){
        s = wolfSSL_ASN1_TIME_new();
        if (s == NULL){
            return NULL;
        }
    }

    /* compute GMT time with offset */
    offset_day_sec = offset_day * sec_per_day;
    t_adj          = t + offset_day_sec + offset_sec;
    ts             = (struct tm *)XGMTIME(&t_adj, tmpTime);
    if (ts == NULL){
        WOLFSSL_MSG("failed to get time data.");
        wolfSSL_ASN1_TIME_free(s);
        return NULL;
    }

    /* create ASN1 time notation */
    /* UTC Time */
    if (ts->tm_year >= 50 && ts->tm_year < 150){
        char utc_str[ASN_UTC_TIME_SIZE];
        int utc_year = 0,utc_mon,utc_day,utc_hour,utc_min,utc_sec;

        if (ts->tm_year >= 50 && ts->tm_year < 100){
            utc_year = ts->tm_year;
        } else if (ts->tm_year >= 100 && ts->tm_year < 150){
            utc_year = ts->tm_year - 100;
        }
        utc_mon  = ts->tm_mon + 1;
        utc_day  = ts->tm_mday;
        utc_hour = ts->tm_hour;
        utc_min  = ts->tm_min;
        utc_sec  = ts->tm_sec;
        XSNPRINTF((char *)utc_str, sizeof(utc_str),
                  "%02d%02d%02d%02d%02d%02dZ",
                  utc_year, utc_mon, utc_day, utc_hour, utc_min, utc_sec);
        if (wolfSSL_ASN1_TIME_set_string(s, utc_str) != WOLFSSL_SUCCESS) {
            wolfSSL_ASN1_TIME_free(s);
            return NULL;
        }
    /* GeneralizedTime */
    } else {
        char gt_str[ASN_GENERALIZED_TIME_MAX];
        int gt_year,gt_mon,gt_day,gt_hour,gt_min,gt_sec;

        gt_year = ts->tm_year + 1900;
        gt_mon  = ts->tm_mon + 1;
        gt_day  = ts->tm_mday;
        gt_hour = ts->tm_hour;
        gt_min  = ts->tm_min;
        gt_sec  = ts->tm_sec;
        XSNPRINTF((char *)gt_str, sizeof(gt_str),
                  "%4d%02d%02d%02d%02d%02dZ",
                  gt_year, gt_mon, gt_day, gt_hour, gt_min,gt_sec);
        if (wolfSSL_ASN1_TIME_set_string(s, gt_str) != WOLFSSL_SUCCESS) {
            wolfSSL_ASN1_TIME_free(s);
            return NULL;
        }
    }

    return s;
}
#endif /* !NO_ASN_TIME && !USER_TIME && !TIME_OVERRIDES */

#ifndef NO_ASN_TIME

WOLFSSL_ASN1_TIME* wolfSSL_ASN1_TIME_new(void)
{
    WOLFSSL_ASN1_TIME* ret = (WOLFSSL_ASN1_TIME*)
            XMALLOC(sizeof(WOLFSSL_ASN1_TIME), NULL, DYNAMIC_TYPE_OPENSSL);
    if (!ret)
        return NULL;
    XMEMSET(ret, 0, sizeof(WOLFSSL_ASN1_TIME));
    return ret;
}

void wolfSSL_ASN1_TIME_free(WOLFSSL_ASN1_TIME* t)
{
    if (t) {
        XFREE(t, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}
/* not a compatibility function - length getter for opaque type */
int wolfSSL_ASN1_TIME_get_length(WOLFSSL_ASN1_TIME *t)
{
    WOLFSSL_ENTER("wolfSSL_ASN1_TIME_get_length");
    if (t == NULL)
        return WOLFSSL_FAILURE;
    return t->length;
}
/* not a compatibility function - data getter for opaque type */
unsigned char* wolfSSL_ASN1_TIME_get_data(WOLFSSL_ASN1_TIME *t)
{
    WOLFSSL_ENTER("wolfSSL_ASN1_TIME_get_data");
    if (t == NULL)
        return NULL;
    return t->data;
}

WOLFSSL_ASN1_TIME* wolfSSL_ASN1_TIME_to_generalizedtime(WOLFSSL_ASN1_TIME *t,
                                                        WOLFSSL_ASN1_TIME **out)
{
    int time_type = 0;
    WOLFSSL_ASN1_TIME *ret = NULL;

    WOLFSSL_ENTER("wolfSSL_ASN1_TIME_to_generalizedtime");
    if (t == NULL) {
        WOLFSSL_MSG("Invalid ASN_TIME value");
    } else {
        time_type = t->type;
        if (time_type != ASN_UTC_TIME && time_type != ASN_GENERALIZED_TIME){
            WOLFSSL_MSG("Invalid ASN_TIME type.");
        } else {
            if (out == NULL || *out == NULL) {
                ret = wolfSSL_ASN1_TIME_new();
                if (ret == NULL){
                    WOLFSSL_MSG("memory alloc failed.");
                }
            } else {
                ret = *out;
            }
        }
    }

    if (ret != NULL) {
        if (time_type == ASN_GENERALIZED_TIME){
            XMEMCPY(ret->data, t->data, ASN_GENERALIZED_TIME_SIZE);
        } else { /* ASN_UTC_TIME */
            /* convert UTC to generalized time */
            ret->type = ASN_GENERALIZED_TIME;
            ret->length = ASN_GENERALIZED_TIME_SIZE;
            if (t->data[0] >= '5') {
                ret->data[0] = '1'; ret->data[1] = '9';
            } else {
                ret->data[0] = '2'; ret->data[1] = '0';
            }
            XMEMCPY(&ret->data[2], t->data, ASN_UTC_TIME_SIZE);
        }
    }

    return ret;
}
#endif /* !NO_ASN_TIME */

#ifndef NO_ASN
int wolfSSL_i2c_ASN1_INTEGER(WOLFSSL_ASN1_INTEGER *a, unsigned char **pp)
{
    unsigned char *pptr = NULL;
    char pad = 0 ;
    unsigned char pad_val = 0;
    int ret_size = 0;
    unsigned char data1 = 0;
    unsigned char neg = 0;
    int i = 0;

    WOLFSSL_ENTER("wolfSSL_i2c_ASN1_INTEGER");
    if (a == NULL)
        return WOLFSSL_FAILURE;

    ret_size = a->intData[1];
    if (ret_size == 0)
        ret_size = 1;
    else{
        ret_size = (int)a->intData[1];
        neg = a->negative;
        data1 = a->intData[2];
        if (ret_size == 1 && data1 == 0)
            neg = 0;
        /* 0x80 or greater positive number in first byte */
        if (!neg && (data1 > 127)){
            pad = 1;
            pad_val = 0;
        } else if (neg){
            /* negative number */
            if (data1 > 128){
                pad = 1;
                pad_val = 0xff;
            } else if (data1 == 128){
                for (i = 3; i < a->intData[1] + 2; i++){
                    if (a->intData[i]){
                        pad = 1;
                        pad_val = 0xff;
                        break;
                    }
                }
            }
        }
        ret_size += (int)pad;
    }
    if (pp == NULL)
        return ret_size;

    pptr = *pp;
    if (pad)
        *(pptr++) = pad_val;
    if (a->intData[1] == 0)
        *(pptr++) = 0;
    else if (!neg){
        /* positive number */
        for (i=0; i < a->intData[1]; i++){
            *pptr = a->intData[i+2];
            pptr++;
        }
    } else {
        /* negative number */
        int str_len = 0;

        /* 0 padding from end of buffer */
        str_len = (int)a->intData[1];
        pptr += a->intData[1] - 1;
        while (!a->intData[str_len + 2] && str_len > 1){
            *(pptr--) = 0;
            str_len--;
        }
        /* 2's complement next octet */
        *(pptr--) = ((a->intData[str_len + 1]) ^ 0xff) + 1;
        str_len--;
        /* Complement any octets left */
        while (str_len > 0){
            *(pptr--) = a->intData[str_len + 1] ^ 0xff;
            str_len--;
        }
    }
    *pp += ret_size;
    return ret_size;
}
#endif /* !NO_ASN */
#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
long wolfSSL_X509_get_version(const WOLFSSL_X509 *x509)
{
    int version = 0;

    WOLFSSL_ENTER("wolfSSL_X509_get_version");

    if (x509 == NULL){
        WOLFSSL_MSG("invalid parameter");
        return 0L;
    }
    version = x509->version;
    if (version != 0)
        return (long)version - 1L;

    return 0L;
}
#endif /* OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL */

#if defined(OPENSSL_EXTRA)
int wolfSSL_X509_get_signature_nid(const WOLFSSL_X509 *x)
{
    if (x == NULL)
        return 0;

    return oid2nid(x->sigOID, oidSigType);
}
#endif  /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) && !defined(NO_RSA)
/* return compliant with OpenSSL
 *   RSA modulus size in bytes, -1 if error
 */
int wolfSSL_RSA_size(const WOLFSSL_RSA* rsa)
{
    WOLFSSL_ENTER("wolfSSL_RSA_size");

    if (rsa == NULL)
        return WOLFSSL_FATAL_ERROR;
    if (rsa->inSet == 0)
    {
        if (SetRsaInternal((WOLFSSL_RSA*)rsa) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("SetRsaInternal failed");
            return 0;
        }
    }
    return wc_RsaEncryptSize((RsaKey*)rsa->internal);
}
/* return RSA modulus in bits                      */
/* @param rsa a pointer to WOLFSSL_RSA structur    */
/* @return RSA modulus size in bits, 0 if error    */
int wolfSSL_RSA_bits(const WOLFSSL_RSA* rsa)
{
    WOLFSSL_ENTER("wolfSSL_RSA_bits");
    
    if (rsa == NULL)
        return WOLFSSL_FAILURE;
    
    return wolfSSL_BN_num_bits(rsa->n);
}
#endif

#if !defined(HAVE_USER_RSA) && !defined(HAVE_FAST_RSA) && \
    !defined(NO_RSA) && (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL))
/* WolfSSL -> OpenSSL */
int SetRsaExternal(WOLFSSL_RSA* rsa)
{
    RsaKey* key;
    WOLFSSL_MSG("Entering SetRsaExternal");

    if (rsa == NULL || rsa->internal == NULL) {
        WOLFSSL_MSG("rsa key NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    key = (RsaKey*)rsa->internal;

    if (SetIndividualExternal(&rsa->n, &key->n) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa n key error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (SetIndividualExternal(&rsa->e, &key->e) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("rsa e key error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (key->type == RSA_PRIVATE) {
        if (SetIndividualExternal(&rsa->d, &key->d) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("rsa d key error");
            return WOLFSSL_FATAL_ERROR;
        }

        if (SetIndividualExternal(&rsa->p, &key->p) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("rsa p key error");
            return WOLFSSL_FATAL_ERROR;
        }

        if (SetIndividualExternal(&rsa->q, &key->q) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("rsa q key error");
            return WOLFSSL_FATAL_ERROR;
        }

    #ifndef RSA_LOW_MEM
        if (SetIndividualExternal(&rsa->dmp1, &key->dP) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("rsa dP key error");
            return WOLFSSL_FATAL_ERROR;
        }

        if (SetIndividualExternal(&rsa->dmq1, &key->dQ) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("rsa dQ key error");
            return WOLFSSL_FATAL_ERROR;
        }

        if (SetIndividualExternal(&rsa->iqmp, &key->u) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("rsa u key error");
            return WOLFSSL_FATAL_ERROR;
        }
    #endif /* !RSA_LOW_MEM */
    }
    rsa->exSet = 1;

    return WOLFSSL_SUCCESS;
}
#endif
#if defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)
/* when calling SetIndividualExternal, mpi should be cleared by caller if no
 * longer used. ie mp_free(mpi). This is to free data when fastmath is
 * disabled since a copy of mpi is made by this function and placed into bn.
 */
int SetIndividualExternal(WOLFSSL_BIGNUM** bn, mp_int* mpi)
{
    byte dynamic = 0;

    WOLFSSL_MSG("Entering SetIndividualExternal");

    if (mpi == NULL || bn == NULL) {
        WOLFSSL_MSG("mpi NULL error");
        return WOLFSSL_FATAL_ERROR;
    }

    if (*bn == NULL) {
        *bn = wolfSSL_BN_new();
        if (*bn == NULL) {
            WOLFSSL_MSG("SetIndividualExternal alloc failed");
            return WOLFSSL_FATAL_ERROR;
        }
        dynamic = 1;
    }

    if (mp_copy(mpi, (mp_int*)((*bn)->internal)) != MP_OKAY) {
        WOLFSSL_MSG("mp_copy error");
        if (dynamic == 1) {
            wolfSSL_BN_free(*bn);
        }
        return WOLFSSL_FATAL_ERROR;
    }

    return WOLFSSL_SUCCESS;
}


static void InitwolfSSL_BigNum(WOLFSSL_BIGNUM* bn)
{
    if (bn) {
        XMEMSET(bn, 0, sizeof(WOLFSSL_BIGNUM));
        bn->neg      = 0;
        bn->internal = NULL;
    }
}


WOLFSSL_BIGNUM* wolfSSL_BN_new(void)
{
    WOLFSSL_BIGNUM* external;
    mp_int*        mpi;

    WOLFSSL_MSG("wolfSSL_BN_new");

#if !defined(USE_FAST_MATH) || defined(HAVE_WOLF_BIGINT)
    mpi = (mp_int*) XMALLOC(sizeof(mp_int), NULL, DYNAMIC_TYPE_BIGINT);
    if (mpi == NULL) {
        WOLFSSL_MSG("wolfSSL_BN_new malloc mpi failure");
        return NULL;
    }
#endif

    external = (WOLFSSL_BIGNUM*) XMALLOC(sizeof(WOLFSSL_BIGNUM), NULL,
                                        DYNAMIC_TYPE_BIGINT);
    if (external == NULL) {
        WOLFSSL_MSG("wolfSSL_BN_new malloc WOLFSSL_BIGNUM failure");
#if !defined(USE_FAST_MATH) || defined(HAVE_WOLF_BIGINT)
        XFREE(mpi, NULL, DYNAMIC_TYPE_BIGINT);
#endif
        return NULL;
    }

#if defined(USE_FAST_MATH) && !defined(HAVE_WOLF_BIGINT)
    mpi = &external->fp;
#endif

    InitwolfSSL_BigNum(external);
    if (mp_init(mpi) != MP_OKAY) {
        wolfSSL_BN_free(external);
        return NULL;
    }
    external->internal = mpi;

    return external;
}


#if defined(USE_FAST_MATH) && !defined(HAVE_WOLF_BIGINT)
/* This function works without BN_free only with TFM */
void wolfSSL_BN_init(WOLFSSL_BIGNUM* bn)
{
    if(bn == NULL)return;
    WOLFSSL_MSG("wolfSSL_BN_init");
    InitwolfSSL_BigNum(bn);
    if (mp_init(&bn->fp) != MP_OKAY)
        return;
    bn->internal = (void *)&bn->fp;
}
#endif

void wolfSSL_BN_free(WOLFSSL_BIGNUM* bn)
{
    WOLFSSL_MSG("wolfSSL_BN_free");
    if (bn) {
        if (bn->internal) {
            mp_int* bni = (mp_int*)bn->internal;
            mp_free(bni);
#if !defined(USE_FAST_MATH) || defined(HAVE_WOLF_BIGINT)
            XFREE(bn->internal, NULL, DYNAMIC_TYPE_BIGINT);
#endif
            bn->internal = NULL;
        }
        XFREE(bn, NULL, DYNAMIC_TYPE_BIGINT);
        /* bn = NULL, don't try to access or double free it */
    }

}

void wolfSSL_BN_clear_free(WOLFSSL_BIGNUM* bn)
{
    WOLFSSL_MSG("wolfSSL_BN_clear_free");
    if (bn) {
        if (bn->internal) {
            mp_int* bni = (mp_int*)bn->internal;
            mp_forcezero(bni);
        }
        wolfSSL_BN_free(bn);
    }
}

void wolfSSL_BN_clear(WOLFSSL_BIGNUM* bn)
{
    WOLFSSL_MSG("wolfSSL_BN_clear");
    if (bn && bn->internal) {
        mp_forcezero((mp_int*)bn->internal);
    }
}
#endif /* OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL */

#if !defined(NO_RSA) && (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL))
static void InitwolfSSL_Rsa(WOLFSSL_RSA* rsa)
{
    if (rsa) {
        XMEMSET(rsa, 0, sizeof(WOLFSSL_RSA));
    }
}


void wolfSSL_RSA_free(WOLFSSL_RSA* rsa)
{
    WOLFSSL_ENTER("wolfSSL_RSA_free");

    if (rsa) {
#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
        wolfSSL_CRYPTO_cleanup_ex_data(&rsa->ex_data);
#endif
#if defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)
        int doFree = 0;
        if (wc_LockMutex(&rsa->refMutex) != 0) {
            WOLFSSL_MSG("Couldn't lock rsa mutex");
        }

        /* only free if all references to it are done */
        rsa->refCount--;
        if (rsa->refCount == 0) {
            doFree = 1;
        }
        wc_UnLockMutex(&rsa->refMutex);

        if (!doFree) {
            return;
        }

        wc_FreeMutex(&rsa->refMutex);
#endif

        if (rsa->internal) {
#if !defined(HAVE_FIPS) && !defined(HAVE_USER_RSA) && \
    !defined(HAVE_FAST_RSA) && defined(WC_RSA_BLINDING)
            WC_RNG* rng;

            /* check if RNG is owned before freeing it */
            if (rsa->ownRng) {
                rng = ((RsaKey*)rsa->internal)->rng;
                if (rng != NULL && rng != &globalRNG) {
                    wc_FreeRng(rng);
                    XFREE(rng, NULL, DYNAMIC_TYPE_RNG);
                }
            }
#endif /* WC_RSA_BLINDING */
            wc_FreeRsaKey((RsaKey*)rsa->internal);
            XFREE(rsa->internal, NULL, DYNAMIC_TYPE_RSA);
            rsa->internal = NULL;
        }
        wolfSSL_BN_free(rsa->iqmp);
        wolfSSL_BN_free(rsa->dmq1);
        wolfSSL_BN_free(rsa->dmp1);
        wolfSSL_BN_free(rsa->q);
        wolfSSL_BN_free(rsa->p);
        wolfSSL_BN_free(rsa->d);
        wolfSSL_BN_free(rsa->e);
        wolfSSL_BN_free(rsa->n);

    #ifdef WC_RSA_BLINDING
        if (rsa->rng && wc_FreeRng(rsa->rng) != 0) {
            WOLFSSL_MSG("Issue freeing rng");
        }
        XFREE(rsa->rng, NULL, DYNAMIC_TYPE_RNG);
    #endif

#if defined(OPENSSL_EXTRA) && !defined(WOLFCRYPT_ONLY)
        if (rsa->meth) {
            wolfSSL_RSA_meth_free(rsa->meth);
        }
#endif

        InitwolfSSL_Rsa(rsa);  /* set back to NULLs for safety */

        XFREE(rsa, NULL, DYNAMIC_TYPE_RSA);

        /* rsa = NULL, don't try to access or double free it */
    }
}

WOLFSSL_RSA* wolfSSL_RSA_new(void)
{
    WOLFSSL_RSA* external;
    RsaKey*     key;

    WOLFSSL_ENTER("wolfSSL_RSA_new");

    key = (RsaKey*) XMALLOC(sizeof(RsaKey), NULL, DYNAMIC_TYPE_RSA);
    if (key == NULL) {
        WOLFSSL_MSG("wolfSSL_RSA_new malloc RsaKey failure");
        return NULL;
    }

    external = (WOLFSSL_RSA*) XMALLOC(sizeof(WOLFSSL_RSA), NULL,
                                     DYNAMIC_TYPE_RSA);
    if (external == NULL) {
        WOLFSSL_MSG("wolfSSL_RSA_new malloc WOLFSSL_RSA failure");
        XFREE(key, NULL, DYNAMIC_TYPE_RSA);
        return NULL;
    }

    InitwolfSSL_Rsa(external);
    if (wc_InitRsaKey(key, NULL) != 0) {
        WOLFSSL_MSG("InitRsaKey WOLFSSL_RSA failure");
        XFREE(external, NULL, DYNAMIC_TYPE_RSA);
        XFREE(key, NULL, DYNAMIC_TYPE_RSA);
        return NULL;
    }

#if !defined(HAVE_FIPS) && !defined(HAVE_USER_RSA) && \
    !defined(HAVE_FAST_RSA) && defined(WC_RSA_BLINDING)
    {
        WC_RNG* rng;

        rng = (WC_RNG*) XMALLOC(sizeof(WC_RNG), NULL, DYNAMIC_TYPE_RNG);
        if (rng != NULL && wc_InitRng(rng) != 0) {
            WOLFSSL_MSG("InitRng failure, attempting to use global RNG");
            XFREE(rng, NULL, DYNAMIC_TYPE_RNG);
            rng = NULL;
        }

        external->ownRng = 1;
        if (rng == NULL && initGlobalRNG) {
            external->ownRng = 0;
            rng = &globalRNG;
        }

        if (rng == NULL) {
            WOLFSSL_MSG("wolfSSL_RSA_new no WC_RNG for blinding");
            XFREE(external, NULL, DYNAMIC_TYPE_RSA);
            XFREE(key, NULL, DYNAMIC_TYPE_RSA);
            return NULL;
        }

        wc_RsaSetRNG(key, rng);
    }
#else
    XMEMSET(key, 0, sizeof(RsaKey));
#endif /* WC_RSA_BLINDING */

    external->internal = key;
    external->inSet = 0;
#if defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)
    external->refCount = 1;
    wc_InitMutex(&external->refMutex);
#endif
    return external;
}
#endif /* !NO_RSA && (OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL) */


#if defined(OPENSSL_EXTRA)
WOLFSSL_STACK* wolfSSL_sk_X509_new(void)
{
    WOLFSSL_STACK* s = (WOLFSSL_STACK*)XMALLOC(sizeof(WOLFSSL_STACK), NULL,
                                                             DYNAMIC_TYPE_X509);
    if (s != NULL) {
        XMEMSET(s, 0, sizeof(*s));
        s->type = STACK_TYPE_X509;
    }

    return s;
}
#endif

#ifdef OPENSSL_ALL
#ifndef NO_BIO
int wolfSSL_PEM_write_bio_PKCS8PrivateKey(WOLFSSL_BIO* bio,
                                          WOLFSSL_EVP_PKEY* pkey,
                                          const WOLFSSL_EVP_CIPHER* enc,
                                          char* passwd, int passwdSz,
                                          pem_password_cb* cb, void* ctx)
{
    int ret = 0;
    char password[NAME_SZ];
    byte* key = NULL;
    word32 keySz;
    byte* pem = NULL;
    int pemSz;
    int type = PKCS8_PRIVATEKEY_TYPE;
    int algId;
    const byte* curveOid;
    word32 oidSz;
    int encAlgId;

    if (bio == NULL || pkey == NULL)
        return -1;

    keySz = pkey->pkey_sz + 128;
    key = (byte*)XMALLOC(keySz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (key == NULL)
        ret = MEMORY_E;

    if (ret == 0 && enc != NULL && passwd == NULL) {
        passwdSz = cb(password, sizeof(password), 1, ctx);
        if (passwdSz < 0)
            ret = WOLFSSL_FAILURE;
        passwd = password;
    }

    if (ret == 0 && enc != NULL) {
        WC_RNG rng;
        ret = wc_InitRng(&rng);
        if (ret == 0) {
        #ifndef NO_DES3
            if (enc == EVP_DES_CBC)
                encAlgId = DESb;
            else if (enc == EVP_DES_EDE3_CBC)
                encAlgId = DES3b;
            else
        #endif
        #if !defined(NO_AES) && defined(HAVE_AES_CBC)
            #ifdef WOLFSSL_AES_256
            if (enc == EVP_AES_256_CBC)
                encAlgId = AES256CBCb;
            else
            #endif
        #endif
                ret = -1;
            if (ret == 0) {
                ret = TraditionalEnc((byte*)pkey->pkey.ptr, pkey->pkey_sz, key,
                                       &keySz, passwd, passwdSz, PKCS5, PBES2,
                                       encAlgId, NULL, 0, WC_PKCS12_ITT_DEFAULT,
                                       &rng, NULL);
                if (ret > 0) {
                    keySz = ret;
                    ret = 0;
                }
            }
            wc_FreeRng(&rng);
        }
        type = PKCS8_ENC_PRIVATEKEY_TYPE;
    }
    if (ret == 0 && enc == NULL) {
        type = PKCS8_PRIVATEKEY_TYPE;
    #ifdef HAVE_ECC
        if (pkey->type == EVP_PKEY_EC) {
            algId = ECDSAk;
            ret = wc_ecc_get_oid(pkey->ecc->group->curve_oid, &curveOid,
                                                                        &oidSz);
        }
        else
    #endif
        {
            algId = RSAk;
            curveOid = NULL;
            oidSz = 0;
        }

    #ifdef HAVE_ECC
        if (ret >= 0)
    #endif
        {
            ret = wc_CreatePKCS8Key(key, &keySz, (byte*)pkey->pkey.ptr,
                                         pkey->pkey_sz, algId, curveOid, oidSz);
            keySz = ret;
        }
    }

    if (password == passwd)
        XMEMSET(password, 0, passwdSz);

    if (ret >= 0) {
        pemSz = 2 * keySz + 2 * 64;
        pem = (byte*)XMALLOC(pemSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
        if (pem == NULL)
            ret = MEMORY_E;
    }

    if (ret >= 0)
        ret = wc_DerToPemEx(key, keySz, pem, pemSz, NULL, type);

    if (key != NULL)
        XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);

    if (ret >= 0) {
        if (wolfSSL_BIO_write(bio, pem, ret) != ret)
            ret = -1;
    }

    if (pem != NULL)
        XFREE(pem, NULL, DYNAMIC_TYPE_TMP_BUFFER);

    return ret < 0 ? 0 : ret;

}

static int bio_get_data(WOLFSSL_BIO* bio, byte** data)
{
    int ret = 0;
    byte* mem = NULL;
#ifndef NO_FILESYSTEM
    long memSz;
    XFILE file;
    long curr;
#endif

    if ((ret = wolfSSL_BIO_pending(bio)) > 0) {
    }
#ifndef NO_FILESYSTEM
    else if (bio->type == WOLFSSL_BIO_FILE) {
        if (wolfSSL_BIO_get_fp(bio, &file) != WOLFSSL_SUCCESS)
            ret = BAD_FUNC_ARG;
        if (ret == 0) {
            curr = XFTELL(file);
            if (curr < 0) {
                ret = WOLFSSL_BAD_FILE;
            }
            if (XFSEEK(file, 0, XSEEK_END) != 0)
                ret = WOLFSSL_BAD_FILE;
        }
        if (ret == 0) {
            memSz = XFTELL(file);
            if (memSz > MAX_WOLFSSL_FILE_SIZE || memSz < 0) {
                ret = WOLFSSL_BAD_FILE;
            }
        }
        if (ret == 0) {
            memSz -= curr;
            ret = (int)memSz;
            if (XFSEEK(file, curr, SEEK_SET) != 0)
                ret = WOLFSSL_BAD_FILE;
        }
    }
#endif

    if (ret > 0) {
        mem = (byte*)XMALLOC(ret, bio->heap, DYNAMIC_TYPE_OPENSSL);
        if (mem == NULL) {
            WOLFSSL_MSG("Memory error");
            ret = MEMORY_E;
        }
        if (ret >= 0) {
            if ((ret = wolfSSL_BIO_read(bio, mem, ret)) <= 0) {
                XFREE(mem, bio->heap, DYNAMIC_TYPE_OPENSSL);
                ret = MEMORY_E;
                mem = NULL;
            }
        }
    }

    *data = mem;

    return ret;
}

#ifndef NO_WOLFSSL_STUB
void wolfSSL_BIO_set_init(WOLFSSL_BIO* bio, int init)
{
    WOLFSSL_STUB("wolfSSL_BIO_set_init");
    (void)bio;
    (void)init;
}

void wolfSSL_BIO_set_shutdown(WOLFSSL_BIO* bio, int shut)
{
    WOLFSSL_STUB("wolfSSL_BIO_set_shutdown");
    (void)bio;
    (void)shut;

}
int wolfSSL_BIO_get_shutdown(WOLFSSL_BIO* bio)
{
    WOLFSSL_STUB("wolfSSL_BIO_get_shutdown");
    (void)bio;
    return 0;
}
#endif /* NO_WOLFSSL_STUB */

void wolfSSL_BIO_clear_retry_flags(WOLFSSL_BIO* bio)
{
    WOLFSSL_ENTER("wolfSSL_BIO_clear_retry_flags");

    if (bio)
        bio->flags &= ~(WOLFSSL_BIO_FLAG_READ|WOLFSSL_BIO_FLAG_RETRY);
}

int wolfSSL_BIO_should_retry(WOLFSSL_BIO *bio)
{
    int ret = 0;
    if (bio != NULL) {
        ret = (int)(bio->flags & WOLFSSL_BIO_FLAG_RETRY);
    }

    return ret;
}

/* DER data is PKCS#8 encrypted. */
WOLFSSL_EVP_PKEY* wolfSSL_d2i_PKCS8PrivateKey_bio(WOLFSSL_BIO* bio,
                                                  WOLFSSL_EVP_PKEY** pkey,
                                                  pem_password_cb* cb,
                                                  void* ctx)
{
    int ret;
    byte* der;
    int len;
    byte* p;
    char password[NAME_SZ];
    int passwordSz;
    word32 algId;
    WOLFSSL_EVP_PKEY* key;

    if ((len = bio_get_data(bio, &der)) < 0)
        return NULL;

    if (cb != NULL) {
        passwordSz = cb(password, sizeof(password), PEM_PASS_READ, ctx);
        if (passwordSz < 0) {
            XFREE(der, bio->heap, DYNAMIC_TYPE_OPENSSL);
            return NULL;
        }

        ret = ToTraditionalEnc(der, len, password, passwordSz, &algId);
        if (ret < 0) {
            XFREE(der, bio->heap, DYNAMIC_TYPE_OPENSSL);
            return NULL;
        }

        XMEMSET(password, 0, passwordSz);
    }

    p = der;
    key = wolfSSL_d2i_PrivateKey_EVP(pkey, &p, len);
    XFREE(der, bio->heap, DYNAMIC_TYPE_OPENSSL);
    return key;
}

#endif /* !NO_BIO */

/* Detect which type of key it is before decoding. */
WOLFSSL_EVP_PKEY* wolfSSL_d2i_AutoPrivateKey(WOLFSSL_EVP_PKEY** pkey,
                                             const unsigned char** pp,
                                             long length)
{
    int ret;
    WOLFSSL_EVP_PKEY* key = NULL;
    const byte* der = *pp;
    word32 idx = 0;
    int len = 0;
    word32 end = 0;
    int cnt = 0;
    int type;
    word32 algId;
    word32 keyLen = (word32)length;

    /* Take off PKCS#8 wrapper if found. */
    if ((len = ToTraditionalInline_ex(der, &idx, keyLen, &algId)) >= 0) {
        der += idx;
        keyLen = len;
    }
    idx = 0;
    len = 0;

    /* Use the number of elements in the outer sequence to determine key type.
     */
    ret = GetSequence(der, &idx, &len, keyLen);
    if (ret >= 0) {
        end = idx + len;
        while (ret >= 0 && idx < end) {
            /* Skip type */
            idx++;
            /* Get length and skip over - keeping count */
            len = 0;
            ret = GetLength(der, &idx, &len, keyLen);
            if (ret >= 0) {
                if (idx + len > end)
                    ret = ASN_PARSE_E;
                else {
                    idx += len;
                    cnt++;
                }
            }
        }
    }

    if (ret >= 0) {
        /* ECC includes version, private[, curve][, public key] */
        if (cnt >= 2 && cnt <= 4)
            type = EVP_PKEY_EC;
        else
            type = EVP_PKEY_RSA;

        key = wolfSSL_d2i_PrivateKey(type, pkey, &der, keyLen);
        *pp = der;
    }

    return key;
}
#endif

#if (defined(OPENSSL_EXTRA) || defined(OPENSSL_EXTRA_X509_SMALL)) && \
    !defined(WOLFCRYPT_ONLY)
/* unlike wolfSSL_X509_NAME_dup this does not malloc a duplicate, only deep
 * copy. "to" is expected to be a fresh blank name, if not pointers could be
 * lost */
int wolfSSL_X509_NAME_copy(WOLFSSL_X509_NAME* from, WOLFSSL_X509_NAME* to)
{
    int i;
    WOLFSSL_X509_NAME_ENTRY* ne;

    WOLFSSL_ENTER("wolfSSL_X509_NAME_copy");

    if (from == NULL || to == NULL) {
        WOLFSSL_MSG("NULL parameter");
        return BAD_FUNC_ARG;
    }

#if defined(OPENSSL_ALL) || defined(WOLFSSL_NGINX) || defined(HAVE_LIGHTY)
    if (from->rawLen > 0) {
        if (from->rawLen > ASN_NAME_MAX) {
            WOLFSSL_MSG("Bad raw size");
            return BAD_FUNC_ARG;
        }
        XMEMCPY(to->raw, from->raw, from->rawLen);
        to->rawLen = from->rawLen;
    }
#endif

    if (from->dynamicName) {
        to->name = (char*)XMALLOC(from->sz, to->heap, DYNAMIC_TYPE_SUBJECT_CN);
        if (to->name == NULL)
            return WOLFSSL_FAILURE;
        to->dynamicName = 1;
    }
    XMEMCPY(to->name, from->name, from->sz);
    to->sz = from->sz;

    for (i = 0; i < MAX_NAME_ENTRIES; i++) {
        ne = wolfSSL_X509_NAME_get_entry(from, i);
        if (ne != NULL)
            wolfSSL_X509_NAME_add_entry(to, ne, i, 1);
    }
    to->entrySz = from->entrySz;
    return WOLFSSL_SUCCESS;
}


/* copies over information from "name" to the "cert" subject name
 * returns WOLFSSL_SUCCESS on success */
int wolfSSL_X509_set_subject_name(WOLFSSL_X509 *cert, WOLFSSL_X509_NAME *name)
{
    WOLFSSL_ENTER("X509_set_subject_name");
    if (cert == NULL || name == NULL)
        return WOLFSSL_FAILURE;

    FreeX509Name(&cert->subject);
    InitX509Name(&cert->subject, 0, cert->heap);

    if (wolfSSL_X509_NAME_copy(name, &cert->subject) != WOLFSSL_SUCCESS) {
        FreeX509Name(&cert->subject);
        return WOLFSSL_FAILURE;
    }

    cert->subject.x509 = cert;
    return WOLFSSL_SUCCESS;
}


/* copies over information from "name" to the "cert" issuer name
 * returns WOLFSSL_SUCCESS on success */
int wolfSSL_X509_set_issuer_name(WOLFSSL_X509 *cert, WOLFSSL_X509_NAME *name)
{
    WOLFSSL_ENTER("X509_set_issuer_name");
    if (cert == NULL || name == NULL)
        return WOLFSSL_FAILURE;

    FreeX509Name(&cert->issuer);
    InitX509Name(&cert->issuer, 0, cert->heap);

    if (wolfSSL_X509_NAME_copy(name, &cert->issuer) != WOLFSSL_SUCCESS) {
        FreeX509Name(&cert->issuer);
        return WOLFSSL_FAILURE;
    }

    cert->issuer.x509 = cert;
    cert->issuerSet = 1;

    return WOLFSSL_SUCCESS;
}


int wolfSSL_X509_set_notAfter(WOLFSSL_X509* x509, const WOLFSSL_ASN1_TIME* t)
{
    if (x509 == NULL || t == NULL) {
        return WOLFSSL_FAILURE;
    }

    x509->notAfter.type = t->type;
    x509->notAfter.length = t->length;

    XMEMCPY(x509->notAfter.data, t->data, CTC_DATE_SIZE);

    return WOLFSSL_SUCCESS;
}

int wolfSSL_X509_set_notBefore(WOLFSSL_X509* x509, const WOLFSSL_ASN1_TIME* t)
{
    if (x509 == NULL || t == NULL) {
        return WOLFSSL_FAILURE;
    }

    x509->notBefore.type = t->type;
    x509->notBefore.length = t->length;

    XMEMCPY(x509->notBefore.data, t->data, CTC_DATE_SIZE);

    return WOLFSSL_SUCCESS;
}

int wolfSSL_X509_set_serialNumber(WOLFSSL_X509* x509, WOLFSSL_ASN1_INTEGER* s)
{
    WOLFSSL_ENTER("wolfSSL_X509_set_serialNumber");
    if (!x509 || !s || s->length >= EXTERNAL_SERIAL_SIZE)
        return WOLFSSL_FAILURE;

    /* WOLFSSL_ASN1_INTEGER has type | size | data */
    if (s->length < 3) {
        return WOLFSSL_FAILURE;
    }
    XMEMCPY(x509->serial, s->data + 2, s->length - 2);
    x509->serialSz = s->length - 2;
    x509->serial[s->length] = 0;

    return WOLFSSL_SUCCESS;
}


int wolfSSL_X509_set_pubkey(WOLFSSL_X509 *cert, WOLFSSL_EVP_PKEY *pkey)
{
    byte* p = NULL;
    int derSz = 0;
    WOLFSSL_ENTER("wolfSSL_X509_set_pubkey");

    if (cert == NULL || pkey == NULL)
        return WOLFSSL_FAILURE;

    /* Regenerate since pkey->pkey.ptr may contain private key */
    switch (pkey->type) {
#if (defined(WOLFSSL_KEY_GEN) || defined(OPENSSL_EXTRA)) && !defined(NO_RSA)
    case EVP_PKEY_RSA:
        {
            RsaKey* rsa;

            if (pkey->rsa == NULL || pkey->rsa->internal == NULL)
                return WOLFSSL_FAILURE;

            rsa = (RsaKey*)pkey->rsa->internal;
            derSz = wc_RsaPublicKeyDerSize(rsa, 1);
            if (derSz <= 0)
                return WOLFSSL_FAILURE;

            p = (byte*)XMALLOC(derSz, cert->heap, DYNAMIC_TYPE_PUBLIC_KEY);
            if (p == NULL)
                return WOLFSSL_FAILURE;

            if ((derSz = wc_RsaKeyToPublicDer(rsa, p, derSz)) <= 0) {
                XFREE(p, cert->heap, DYNAMIC_TYPE_PUBLIC_KEY);
                return WOLFSSL_FAILURE;
            }
            cert->pubKeyOID = RSAk;
        }
        break;
#endif /* (WOLFSSL_KEY_GEN || OPENSSL_EXTRA) && !NO_RSA */
#if !defined(HAVE_SELFTEST) && (defined(WOLFSSL_KEY_GEN) || \
        defined(WOLFSSL_CERT_GEN)) && !defined(NO_DSA)
    case EVP_PKEY_DSA:
        {
            DsaKey* dsa;

            if (pkey->dsa == NULL || pkey->dsa->internal == NULL)
                return WOLFSSL_FAILURE;

            dsa = (DsaKey*)pkey->dsa->internal;
            /* size of pub, priv, p, q, g + ASN.1 additional information */
            derSz = 5 * mp_unsigned_bin_size(&dsa->g) + MAX_ALGO_SZ;
            p = (byte*)XMALLOC(derSz, cert->heap, DYNAMIC_TYPE_PUBLIC_KEY);
            if (p == NULL)
                return WOLFSSL_FAILURE;

            if ((derSz = wc_DsaKeyToPublicDer(dsa, p, derSz)) <= 0) {
                XFREE(p, cert->heap, DYNAMIC_TYPE_PUBLIC_KEY);
                return WOLFSSL_FAILURE;
            }
            cert->pubKeyOID = RSAk;
        }
        break;
#endif /* !HAVE_SELFTEST && (WOLFSSL_KEY_GEN || WOLFSSL_CERT_GEN) && !NO_DSA */
#ifdef HAVE_ECC
    case EVP_PKEY_EC:
        {
            ecc_key* ecc;

            if (pkey->ecc == NULL || pkey->ecc->internal == NULL)
                return WOLFSSL_FAILURE;

            ecc = (ecc_key*)pkey->ecc->internal;
            derSz = wc_EccPublicKeyDerSize(ecc, 1);
            if (derSz <= 0)
                return WOLFSSL_FAILURE;

            p = (byte*)XMALLOC(derSz, cert->heap, DYNAMIC_TYPE_PUBLIC_KEY);
            if (p == NULL)
                return WOLFSSL_FAILURE;

            if ((derSz = wc_EccPublicKeyToDer(ecc, p, derSz, 1)) <= 0) {
                XFREE(p, cert->heap, DYNAMIC_TYPE_PUBLIC_KEY);
                return WOLFSSL_FAILURE;
            }
            cert->pubKeyOID = ECDSAk;
        }
        break;
#endif
    default:
        return WOLFSSL_FAILURE;
    }
    cert->pubKey.buffer = p;
    cert->pubKey.length = derSz;

    return WOLFSSL_SUCCESS;
}

int wolfSSL_X509_set_version(WOLFSSL_X509* x509, long v)
{
    WOLFSSL_ENTER("wolfSSL_X509_set_version");
    if ((x509 == NULL) || (v < 0) || (v > INT_MAX)) {
        return WOLFSSL_FAILURE;
    }
    x509->version = (int) v + 1;

    return WOLFSSL_SUCCESS;
}

#endif /* (OPENSSL_EXTRA || OPENSSL_EXTRA_X509_SMALL) && WOLFSSL_CERT_GEN */

#if defined(OPENSSL_ALL) && !defined(NO_CERTS) && \
    defined(WOLFSSL_CERT_GEN) && defined(WOLFSSL_CERT_REQ)

void wolfSSL_X509V3_set_ctx(WOLFSSL_X509V3_CTX* ctx, WOLFSSL_X509* issuer,
        WOLFSSL_X509* subject, WOLFSSL_X509* req, WOLFSSL_X509_CRL* crl,
        int flag)
{
    int ret = WOLFSSL_SUCCESS;
    WOLFSSL_ENTER("wolfSSL_X509V3_set_ctx");
    if (!ctx || !ctx->x509)
        return;

    if (!ctx->x509) {
        ctx->x509 = wolfSSL_X509_new();
        if (!ctx->x509)
            return;
    }

    /* Set parameters in ctx as long as ret == WOLFSSL_SUCCESS */
    if (issuer)
        ret = wolfSSL_X509_set_issuer_name(ctx->x509,&issuer->issuer);

    if (subject && ret == WOLFSSL_SUCCESS)
        ret = wolfSSL_X509_set_subject_name(ctx->x509,&subject->subject);

    if (req && ret == WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("req not implemented.");
    }

    if (crl && ret == WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("crl not implemented.");
    }

    if (flag && ret == WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("flag not implemented.");
    }

    if (!ret) {
        WOLFSSL_MSG("Error setting WOLFSSL_X509V3_CTX parameters.");
    }
}

int wolfSSL_i2d_X509_REQ(WOLFSSL_X509* req, unsigned char** out)
{
    int derSz = 0;
    int ret = WOLFSSL_FAILURE;
    WOLFSSL_BIO* bio = NULL;
    WOLFSSL_ENTER("wolfSSL_i2d_X509_REQ");

    if (req == NULL || out == NULL) {
        return BAD_FUNC_ARG;
    }

    if (!(bio = wolfSSL_BIO_new(wolfSSL_BIO_s_mem()))) {
        return WOLFSSL_FAILURE;
    }

    if (wolfSSL_i2d_X509_REQ_bio(bio, req) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("wolfSSL_i2d_X509_REQ_bio error");
        goto cleanup;
    }

    derSz = wolfSSL_BIO_get_len(bio);

    if (*out == NULL) {
        *out = (unsigned char*)XMALLOC(derSz, NULL, DYNAMIC_TYPE_OPENSSL);
        if (!*out) {
            WOLFSSL_MSG("malloc error");
            ret = MEMORY_E;
            goto cleanup;
        }
    }

    if (wolfSSL_BIO_read(bio, *out, derSz) != derSz) {
        WOLFSSL_MSG("wolfSSL_BIO_read error");
        goto cleanup;
    }

    ret = derSz;
cleanup:
    wolfSSL_BIO_free(bio);

    return ret;
}

WOLFSSL_X509* wolfSSL_X509_REQ_new(void)
{
    return wolfSSL_X509_new();
}

void wolfSSL_X509_REQ_free(WOLFSSL_X509* req)
{
    wolfSSL_X509_free(req);
}

int wolfSSL_X509_REQ_sign(WOLFSSL_X509 *req, WOLFSSL_EVP_PKEY *pkey,
                          const WOLFSSL_EVP_MD *md)
{
    byte der[2048];
    int derSz = sizeof(der);

    if (req == NULL || pkey == NULL || md == NULL)
        return WOLFSSL_FAILURE;

    /* Create a Cert that has the certificate request fields. */
    req->sigOID = wolfSSL_sigTypeFromPKEY((WOLFSSL_EVP_MD*)md, pkey);
    if (wolfssl_x509_make_der(req, 1, der, &derSz, 0) != WOLFSSL_SUCCESS) {
        return WOLFSSL_FAILURE;
    }

    if (wolfSSL_X509_resign_cert(req, 1, der, sizeof(der), derSz,
            (WOLFSSL_EVP_MD*)md, pkey) <= 0) {
        return WOLFSSL_FAILURE;
    }
    return WOLFSSL_SUCCESS;
}

int wolfSSL_X509_REQ_sign_ctx(WOLFSSL_X509 *req,
                              WOLFSSL_EVP_MD_CTX* md_ctx)
{
    if (md_ctx && md_ctx->pctx)
        return wolfSSL_X509_REQ_sign(req, md_ctx->pctx->pkey,
                wolfSSL_EVP_MD_CTX_md(md_ctx));
    else
        return WOLFSSL_FAILURE;
}

static int regenX509REQDerBuffer(WOLFSSL_X509* x509)
{
    int derSz = X509_BUFFER_SZ;
    int ret = WOLFSSL_FAILURE;
#ifdef WOLFSSL_SMALL_STACK
    byte* der;
    der = (byte*)XMALLOC(derSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (!der) {
        WOLFSSL_MSG("malloc failed");
        return WOLFSSL_FAILURE;
    }
#else
    byte der[X509_BUFFER_SZ];
#endif

    if (wolfssl_x509_make_der(x509, 1, der, &derSz, 0) == WOLFSSL_SUCCESS) {
        FreeDer(&x509->derCert);
        if (AllocDer(&x509->derCert, derSz, CERT_TYPE, x509->heap) == 0) {
            XMEMCPY(x509->derCert->buffer, der, derSz);
            ret = WOLFSSL_SUCCESS;
        }
        else {
            WOLFSSL_MSG("Failed to allocate DER buffer for X509");
        }
    }
    else {
        WOLFSSL_MSG("Unable to make DER for X509 REQ");
    }
#ifdef WOLFSSL_SMALL_STACK
    XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
    return ret;
}

int wolfSSL_X509_REQ_add_extensions(WOLFSSL_X509* req,
        WOLF_STACK_OF(WOLFSSL_X509_EXTENSION)* ext_sk)
{
    if (!req || !ext_sk) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    while (ext_sk) {
        WOLFSSL_X509_EXTENSION* ext = ext_sk->data.ext;

        if (wolfSSL_X509_add_ext(req, ext, -1) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("wolfSSL_X509_add_ext error");
            return WOLFSSL_FAILURE;
        }

        ext_sk = ext_sk->next;
    }

    return regenX509REQDerBuffer(req);
}

int wolfSSL_X509_REQ_add1_attr_by_txt(WOLFSSL_X509 *req,
                              const char *attrname, int type,
                              const unsigned char *bytes, int len)
{
    WOLFSSL_ENTER("wolfSSL_X509_REQ_add1_attr_by_txt");

#ifdef HAVE_LIBEST
    if (!req || !attrname || !bytes || type != MBSTRING_ASC) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    if (len < 0) {
        len = (int)XSTRLEN((char*)bytes);
    }

    /* For now just pretend that we support this for libest testing */
    if (len == XSTR_SIZEOF("1.3.6.1.1.1.1.22") &&
            XMEMCMP("1.3.6.1.1.1.1.22", bytes, len) == 0) {
        /* MAC Address */
    }
    else if (len == XSTR_SIZEOF("1.2.840.10045.2.1") &&
            XMEMCMP("1.2.840.10045.2.1", bytes, len) == 0) {
        /* ecPublicKey */
    }
    else if (len == XSTR_SIZEOF("1.2.840.10045.4.3.3") &&
            XMEMCMP("1.2.840.10045.4.3.3", bytes, len) == 0) {
        /* ecdsa-with-SHA384 */
    }
    else {
        return WOLFSSL_FAILURE;
    }

    /* return error if not built for libest */
    return WOLFSSL_SUCCESS;
#else
    (void)req;
    (void)attrname;
    (void)type;
    (void)bytes;
    (void)len;
    return WOLFSSL_FAILURE;
#endif
}

int wolfSSL_X509_REQ_add1_attr_by_NID(WOLFSSL_X509 *req,
                                      int nid, int type,
                                      const unsigned char *bytes,
                                      int len)
{
    WOLFSSL_ENTER("wolfSSL_X509_REQ_add1_attr_by_NID");

    if (!req || !bytes || type != MBSTRING_ASC) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    switch (nid) {
    case NID_pkcs9_challengePassword:
        if (len < 0)
            len = (int)XSTRLEN((char*)bytes);
        if (len < CTC_NAME_SIZE) {
            XMEMCPY(req->challengePw, bytes, len);
            req->challengePw[len] = '\0';
        }
        else {
            WOLFSSL_MSG("Challenge password too long");
            return WOLFSSL_FAILURE;
        }
        if (req->challengePwAttr) {
            wolfSSL_X509_ATTRIBUTE_free(req->challengePwAttr);
        }
        req->challengePwAttr = wolfSSL_X509_ATTRIBUTE_new();
        if (req->challengePwAttr) {
            req->challengePwAttr->value->value.asn1_string =
                    wolfSSL_ASN1_STRING_new();
            if (wolfSSL_ASN1_STRING_set(
                    req->challengePwAttr->value->value.asn1_string,
                    bytes, len) != WOLFSSL_SUCCESS) {
                WOLFSSL_MSG("wolfSSL_ASN1_STRING_set error");
                return WOLFSSL_FAILURE;
            }
            req->challengePwAttr->value->type = V_ASN1_PRINTABLESTRING;
        }
        else {
            WOLFSSL_MSG("wolfSSL_X509_ATTRIBUTE_new error");
            return WOLFSSL_FAILURE;
        }
        break;
    case NID_serialNumber:
        if (len < 0)
            len = (int)XSTRLEN((char*)bytes);
        if (len + 1 > EXTERNAL_SERIAL_SIZE) {
            WOLFSSL_MSG("SerialNumber too long");
            return WOLFSSL_FAILURE;
        }
        XMEMCPY(req->serial, bytes, len);
        req->serialSz = len;
        break;
    default:
        WOLFSSL_MSG("Unsupported attribute");
        return WOLFSSL_FAILURE;
    }
    return WOLFSSL_SUCCESS;
}


/* Return NID as the attr index */
int wolfSSL_X509_REQ_get_attr_by_NID(const WOLFSSL_X509 *req,
        int nid, int lastpos)
{
    WOLFSSL_ENTER("wolfSSL_X509_REQ_get_attr_by_NID");

    /* Since we only support 1 attr per attr type then a lastpos of >= 0
     * indicates that one was already returned */
    if (!req || lastpos >= 0) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FATAL_ERROR;
    }

    switch (nid) {
    case NID_pkcs9_challengePassword:
        return req->challengePwAttr ? nid : WOLFSSL_FATAL_ERROR;
    default:
        WOLFSSL_MSG("Unsupported attribute");
        return WOLFSSL_FATAL_ERROR;
    }
}

/**
 * @param req X509_REQ containing attribute
 * @param loc NID of the attribute to return
 */
WOLFSSL_X509_ATTRIBUTE *wolfSSL_X509_REQ_get_attr(
        const WOLFSSL_X509 *req, int loc)
{
    WOLFSSL_ENTER("wolfSSL_X509_REQ_get_attr");

    if (!req) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    switch (loc) {
    case NID_pkcs9_challengePassword:
        return req->challengePwAttr;
    default:
        WOLFSSL_MSG("Unsupported attribute");
        return NULL;
    }
}

WOLFSSL_X509_ATTRIBUTE* wolfSSL_X509_ATTRIBUTE_new(void)
{
    WOLFSSL_X509_ATTRIBUTE* ret;
    WOLFSSL_ENTER("wolfSSL_X509_ATTRIBUTE_new");
    ret = (WOLFSSL_X509_ATTRIBUTE*)XMALLOC(sizeof(WOLFSSL_X509_ATTRIBUTE),
            NULL, DYNAMIC_TYPE_OPENSSL);
    if (!ret) {
        WOLFSSL_MSG("malloc error");
        return NULL;
    }
    XMEMSET(ret, 0, sizeof(WOLFSSL_X509_ATTRIBUTE));
    ret->object = wolfSSL_ASN1_OBJECT_new();
    ret->value = wolfSSL_ASN1_TYPE_new();
    /* Don't allocate ret->set since WOLFSSL_ASN1_TYPE
     * is not supported as a stack type */
    if (!ret->object || !ret->value) {
        WOLFSSL_MSG("wolfSSL_ASN1_OBJECT_new or wolfSSL_ASN1_TYPE_new error");
        wolfSSL_X509_ATTRIBUTE_free(ret);
        return NULL;
    }
    return ret;
}

void wolfSSL_X509_ATTRIBUTE_free(WOLFSSL_X509_ATTRIBUTE* attr)
{
    WOLFSSL_ENTER("wolfSSL_X509_ATTRIBUTE_free");
    if (attr) {
        if (attr->object) {
            wolfSSL_ASN1_OBJECT_free(attr->object);
        }
        if (attr->value) {
            wolfSSL_ASN1_TYPE_free(attr->value);
        }
        if (attr->set) {
            wolfSSL_sk_free(attr->set);
        }
        XFREE(attr, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}

WOLFSSL_ASN1_TYPE *wolfSSL_X509_ATTRIBUTE_get0_type(
        WOLFSSL_X509_ATTRIBUTE *attr, int idx)
{
    WOLFSSL_ENTER("wolfSSL_X509_ATTRIBUTE_get0_type");

    if (!attr || idx != 0) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    return attr->value;
}

WOLFSSL_X509 *wolfSSL_X509_to_X509_REQ(WOLFSSL_X509 *x,
        WOLFSSL_EVP_PKEY *pkey, const WOLFSSL_EVP_MD *md)
{
    WOLFSSL_ENTER("wolfSSL_X509_to_X509_REQ");
    (void)pkey;
    (void)md;
    return wolfSSL_X509_dup(x);
}

int wolfSSL_X509_REQ_set_subject_name(WOLFSSL_X509 *req,
                                      WOLFSSL_X509_NAME *name)
{
    return wolfSSL_X509_set_subject_name(req, name);
}

int wolfSSL_X509_REQ_set_pubkey(WOLFSSL_X509 *req, WOLFSSL_EVP_PKEY *pkey)
{
    return wolfSSL_X509_set_pubkey(req, pkey);
}
#endif /* OPENSSL_ALL && !NO_CERTS && WOLFSSL_CERT_GEN && WOLFSSL_CERT_REQ */

#ifdef WOLFSSL_STATIC_EPHEMERAL
static int SetStaticEphemeralKey(StaticKeyExchangeInfo_t* staticKE, int keyAlgo, 
    const char* key, unsigned int keySz, int format, void* heap)
{
    int ret = 0;
    DerBuffer* der = NULL;
    byte* keyBuf = NULL;
#ifndef NO_FILESYSTEM
    const char* keyFile = NULL;
#endif

    /* allow empty key to free buffer */
    if (staticKE == NULL || (key == NULL && keySz > 0)) {
        return BAD_FUNC_ARG;
    }

    WOLFSSL_ENTER("SetStaticEphemeralKey");

    /* if just free'ing key then skip loading */
    if (key != NULL && keySz > 0) {
    #ifndef NO_FILESYSTEM
        /* load file from filesystem */
        if (key && keySz == 0) {
            size_t keyBufSz = 0;
            keyFile = (const char*)key;
            ret = wc_FileLoad(keyFile, &keyBuf, &keyBufSz, heap);
            if (ret != 0) {
                return ret;
            }
            keySz = (unsigned int)keyBufSz;
        }
        else
    #endif
        {
            /* use as key buffer directly */
            keyBuf = (byte*)key;
        }

        if (format == WOLFSSL_FILETYPE_PEM) {
        #ifdef WOLFSSL_PEM_TO_DER
            int keyFormat = 0;
            ret = PemToDer(keyBuf, keySz, PRIVATEKEY_TYPE, &der, 
                heap, NULL, &keyFormat);
            /* auto detect key type */
            if (ret == 0 && keyAlgo == WC_PK_TYPE_NONE) {
                if (keyFormat == ECDSAk)
                    keyAlgo = WC_PK_TYPE_ECDH;
                else
                    keyAlgo = WC_PK_TYPE_DH;
            }
        #else
            ret = NOT_COMPILED_IN;
        #endif
        }
        else {
            /* Detect PK type (if required) */
        #ifdef HAVE_ECC
            if (keyAlgo == WC_PK_TYPE_NONE) {
                word32 idx = 0;
                ecc_key eccKey;
                ret = wc_ecc_init_ex(&eccKey, heap, INVALID_DEVID);
                if (ret == 0) {
                    ret = wc_EccPrivateKeyDecode(keyBuf, &idx, &eccKey, keySz);
                    if (ret == 0)
                        keyAlgo = WC_PK_TYPE_ECDH;
                    wc_ecc_free(&eccKey);
                }
            }
        #endif
        #if !defined(NO_DH) && defined(WOLFSSL_DH_EXTRA)
            if (keyAlgo == WC_PK_TYPE_NONE) {
                word32 idx = 0;
                DhKey dhKey;
                ret = wc_InitDhKey_ex(&dhKey, heap, INVALID_DEVID);
                if (ret == 0) {
                    ret = wc_DhKeyDecode(keyBuf, &idx, &dhKey, keySz);
                    if (ret == 0)
                        keyAlgo = WC_PK_TYPE_DH;
                    wc_FreeDhKey(&dhKey);
                }
            }
        #endif

            if (keyAlgo != WC_PK_TYPE_NONE) {
                ret = AllocDer(&der, keySz, PRIVATEKEY_TYPE, heap);
                if (ret == 0) {
                    XMEMCPY(der->buffer, keyBuf, keySz);
                }
            }
        }
    }

#ifndef NO_FILESYSTEM
    /* done with keyFile buffer */
    if (keyFile && keyBuf) {
        XFREE(keyBuf, heap, DYNAMIC_TYPE_TMP_BUFFER);
    }
#endif

    /* if key is already allocated then set free it */
#ifndef NO_DH
    if (keyAlgo == WC_PK_TYPE_DH && staticKE->dhKey && staticKE->weOwnDH)
        FreeDer(&staticKE->dhKey);
#endif
#ifdef HAVE_ECC
    if (keyAlgo == WC_PK_TYPE_ECDH && staticKE->ecKey && staticKE->weOwnEC)
        FreeDer(&staticKE->ecKey);
#endif

    switch (keyAlgo) {
    #ifndef NO_DH
        case WC_PK_TYPE_DH:
            staticKE->dhKey = der;
            staticKE->weOwnDH = 1;
            break;
    #endif
    #ifdef HAVE_ECC
        case WC_PK_TYPE_ECDH:
            staticKE->ecKey = der;
            staticKE->weOwnEC = 1;
            break;
    #endif
        default:
            /* not supported */
            ret = NOT_COMPILED_IN;
            FreeDer(&der);
            break;
    }

    WOLFSSL_LEAVE("SetStaticEphemeralKey", ret);

    return ret;
}

int wolfSSL_CTX_set_ephemeral_key(WOLFSSL_CTX* ctx, int keyAlgo, 
    const char* key, unsigned int keySz, int format)
{
    if (ctx == NULL) {
        return BAD_FUNC_ARG;
    }

    return SetStaticEphemeralKey(&ctx->staticKE, keyAlgo, key, keySz, format, 
        ctx->heap);
}
int wolfSSL_set_ephemeral_key(WOLFSSL* ssl, int keyAlgo, 
    const char* key, unsigned int keySz, int format)
{
    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    return SetStaticEphemeralKey(&ssl->staticKE, keyAlgo, key, keySz, format, 
        ssl->heap);
}

static int GetStaticEphemeralKey(StaticKeyExchangeInfo_t* staticKE, int keyAlgo, 
    const unsigned char** key, unsigned int* keySz)
{
    int ret = 0;
    DerBuffer* der = NULL;

    if (staticKE == NULL || key == NULL || keySz == NULL) {
        return BAD_FUNC_ARG;
    }

    *key = NULL;
    *keySz = 0;

    switch (keyAlgo) {
    #ifndef NO_DH
        case WC_PK_TYPE_DH:
            der = staticKE->dhKey;
            break;
    #endif
    #ifdef HAVE_ECC
        case WC_PK_TYPE_ECDH:
            der = staticKE->ecKey;
            break;
    #endif
        default:
            /* not supported */
            ret = NOT_COMPILED_IN;
            break;
    }

    if (der) {
        *key = der->buffer;
        *keySz = der->length;
    }

    return ret;
}

/* returns pointer to currently loaded static ephemeral as ASN.1 */
/* this can be converted to PEM using wc_DerToPem */
int wolfSSL_CTX_get_ephemeral_key(WOLFSSL_CTX* ctx, int keyAlgo, 
    const unsigned char** key, unsigned int* keySz)
{
    if (ctx == NULL) {
        return BAD_FUNC_ARG;
    }

    return GetStaticEphemeralKey(&ctx->staticKE, keyAlgo, key, keySz);
}
int wolfSSL_get_ephemeral_key(WOLFSSL* ssl, int keyAlgo, 
    const unsigned char** key, unsigned int* keySz)
{
    if (ssl == NULL) {
        return BAD_FUNC_ARG;
    }

    return GetStaticEphemeralKey(&ssl->staticKE, keyAlgo, key, keySz);
}

#endif /* WOLFSSL_STATIC_EPHEMERAL */

#if defined(OPENSSL_EXTRA)
/* wolfSSL_THREADID_current is provided as a compat API with
 * CRYPTO_THREADID_current to register current thread id into given id object.
 * However, CRYPTO_THREADID_current API has been deprecated and no longer
 * exists in the OpenSSL 1.0.0 or later.This API only works as a stub
 * like as existing wolfSSL_THREADID_set_numeric. 
 */
void wolfSSL_THREADID_current(WOLFSSL_CRYPTO_THREADID* id)
{
    (void)id;
    return;
}
/* wolfSSL_THREADID_hash is provided as a compatible API with
 * CRYPTO_THREADID_hash which returns a hash value calcurated from the
 * specified thread id. However, CRYPTO_THREADID_hash API has been
 * deprecated and no longer exists in the OpenSSL 1.0.0 or later.
 * This API only works as a stub to returns 0. This behavior is
 * equivalent to the latest OpenSSL CRYPTO_THREADID_hash.
 */
unsigned long wolfSSL_THREADID_hash(const WOLFSSL_CRYPTO_THREADID* id)
{
    (void)id;
    return 0UL;
}
/* wolfSSL_CTX_set_ecdh_auto is provided as compatible API with
 * SSL_CTX_set_ecdh_auto to enable auto ecdh curve selection functionality.
 * Since this functionality is enabled by default in wolfSSL,
 * this API exists as a stub.
 */
int wolfSSL_CTX_set_ecdh_auto(WOLFSSL_CTX* ctx, int onoff)
{
    (void)ctx;
    (void)onoff;
    return WOLFSSL_SUCCESS;
}

/**
 * set security level (wolfSSL doesn't support security level)
 * @param ctx  a pointer to WOLFSSL_EVP_PKEY_CTX structure
 * @param level security level
 */
void wolfSSL_CTX_set_security_level(WOLFSSL_CTX* ctx, int level)
{
    WOLFSSL_ENTER("wolfSSL_CTX_set_security_level");
    (void)ctx;
    (void)level;
}
/**
 * get security level (wolfSSL doesn't support security level)
 * @param ctx  a pointer to WOLFSSL_EVP_PKEY_CTX structure
 * @return always 0(level 0)
 */
int wolfSSL_CTX_get_security_level(const WOLFSSL_CTX* ctx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_get_security_level");
    (void)ctx;
    return 0;
}


/**
 * Determine whether a WOLFSSL_SESSION object can be used for resumption
 * @param s  a pointer to WOLFSSL_SESSION structure
 * @return return 1 if session is resumable, otherwise 0.
 */
int wolfSSL_SESSION_is_resumable(const WOLFSSL_SESSION *s)
{
    if (s == NULL)
        return 0;

    #ifdef HAVE_SESSION_TICKET
    if (s->ticketLen > 0)
        return 1;
    #endif

    if (s->sessionIDSz > 0)
        return 1;

    return 0;
}

/**
 * Allocate WOLFSSL_CONF_CTX instance
 * @return pointer to WOLFSSL_CONF_CTX structure on success and NULL on fail
 */
WOLFSSL_CONF_CTX* wolfSSL_CONF_CTX_new(void)
{
    WOLFSSL_CONF_CTX* cctx;
    
    WOLFSSL_ENTER("wolfSSL_CONF_CTX_new");
    
    cctx = (WOLFSSL_CONF_CTX*)XMALLOC(sizeof(WOLFSSL_CONF_CTX), NULL, 
                                                    DYNAMIC_TYPE_OPENSSL);
    if (!cctx) {
        WOLFSSL_MSG("malloc error");
        return NULL;
    }
    XMEMSET(cctx, 0, sizeof(WOLFSSL_CONF_CTX));
    
    return cctx;
}
/**
 * Release WOLFSSL_CONF_CTX instance
 * @param cctx a pointer to WOLFSSL_CONF_CTX structure to be freed
 * @return none
 */
void wolfSSL_CONF_CTX_free(WOLFSSL_CONF_CTX* cctx)
{
    WOLFSSL_ENTER("wolfSSL_CONF_CTX_free");
    
    if (cctx) {
        XFREE(cctx, NULL, DYNAMIC_TYPE_OPENSSL);
    }
    WOLFSSL_LEAVE("wolfSSL_CONF_CTX_free", 1);
}
/**
 * Set WOLFSSL_CTX instance to WOLFSSL_CONF_CTX
 * @param cctx a pointer to WOLFSSL_CONF_CTX structure to set a WOLFSSL_CTX 
 *             pointer to its ctx 
 * @param ctx  a pointer to WOLFSSL_CTX structure to be set
 * @return none
 */
void wolfSSL_CONF_CTX_set_ssl_ctx(WOLFSSL_CONF_CTX* cctx, WOLFSSL_CTX *ctx)
{
    WOLFSSL_ENTER("wolfSSL_CONF_CTX_set_ssl_ctx");
    
    /* sanity check */
    if (cctx == NULL) {
        WOLFSSL_MSG("cctx is null");
        return;
    }
    
    cctx->ctx = ctx;
    WOLFSSL_LEAVE("wolfSSL_CONF_CTX_set_ssl_ctx", 1);
}
/**
 * set flag value into WOLFSSL_CONF_CTX
 * @param cctx  a pointer to WOLFSSL_CONF_CTX structure to be set
 * @param flags falg value to be OR'd
 * @return OR'd flag value, otherwise 0
 */
unsigned int wolfSSL_CONF_CTX_set_flags(WOLFSSL_CONF_CTX* cctx, 
                                                            unsigned int flags)
{
    /* sanity check */
    if (cctx == NULL)
        return 0;
    
    cctx->flags |= flags;
    return cctx->flags;
}

/**
 * finish configuration command operation
 * @param cctx  a pointer to WOLFSSL_CONF_CTX structure to be set
 * @return WOLFSSL_SUCCESS on success
 */
int wolfSSL_CONF_CTX_finish(WOLFSSL_CONF_CTX* cctx)
{
    (void)cctx;
    return WOLFSSL_SUCCESS;
}
/* 
 * The following definitions and static functions are used for 
 * wolfSSL_CONF_cmd() to handle command.
 * 
 * Definitions below are a part of conf_cmds_tbl[] contents.
 *  WOLFSSL_CONF_FILE_CMDx  represents command name in configuration file 
 *  WOLFSSL_CONF_CMDL_CMDx  represents command name on command line
 * 
 * The static functions after the definition section process 
 *                 those FILE or CMDL which are defined in the conf_cmds_tbl.
 * 
 * To add a new command handling:
 *  1. Add new #define to a section of WOLFSSL_CONF_FILE_CMD* and
 *                                      WOLFSSL_CONF_CMDL_CMD*
 *  2. Add new static function after #define section, before 
 *                      "typedef struct conf_cmd_tbl {" line
 *  3. Add new entry to conf_cmds_tbl[] by following other command entries
 */ 
#define WOLFSSL_CONF_FILE_CMD1  "Curves"
#define WOLFSSL_CONF_FILE_CMD2  "Certificate"
#define WOLFSSL_CONF_FILE_CMD3  "PrivateKey"
#define WOLFSSL_CONF_FILE_CMD4  "Protocol"
#define WOLFSSL_CONF_FILE_CMD5  "Options"
#define WOLFSSL_CONF_FILE_CMD6  "ServerInfoFile"
#define WOLFSSL_CONF_FILE_CMD7  "SignatureAlgorithms"
#define WOLFSSL_CONF_FILE_CMD8  "ClientSignatureAlgorithms"
#define WOLFSSL_CONF_FILE_CMD9  "CipherString"

#define WOLFSSL_CONF_CMDL_CMD1  "curves"
#define WOLFSSL_CONF_CMDL_CMD2  "cert"
#define WOLFSSL_CONF_CMDL_CMD3  "key"
#define WOLFSSL_CONF_CMDL_CMD4  NULL
#define WOLFSSL_CONF_CMDL_CMD5  NULL
#define WOLFSSL_CONF_CMDL_CMD6  NULL
#define WOLFSSL_CONF_CMDL_CMD7  "sigalgs"
#define WOLFSSL_CONF_CMDL_CMD8  "client_sigalgs"
#define WOLFSSL_CONF_CMDL_CMD9  "cipher"

#if !defined(NO_DH) && !defined(NO_BIO)
#define WOLFSSL_CONF_FILE_CMD10 "DHParameters"
#define WOLFSSL_CONF_CMDL_CMD10 "dhparam"
#endif

#ifdef HAVE_ECC
#define WOLFSSL_CONF_FILE_CMD11 "ECDHParameters"
#define WOLFSSL_CONF_CMDL_CMD11 "named_curves"
#endif

/**
 * process Cipher String command
 * @param cctx  a pointer to WOLFSSL_CONF_CTX structure
 * @param value arguments for cmd
 * @return WOLFSSL_SUCCESS on success, 
 *     otherwise WOLFSSL_FAILURE or
 *               -3 if value is null or
 *               negative value on other failure
 */
static int cmdfunc_cipherstring(WOLFSSL_CONF_CTX* cctx, const char* value)
{
    int ret = -3;
    
    WOLFSSL_ENTER("cmdfunc_cipherstring");
    
     /* sanity check */
    if (cctx == NULL)
        return WOLFSSL_FAILURE;
    
    if (value == NULL) {
        WOLFSSL_MSG("bad arguments");
        return ret;
    }
    
    if (cctx->ctx) {
        ret = wolfSSL_CTX_set_cipher_list(cctx->ctx, value);
    }
    
    if (((cctx->ctx  && ret == WOLFSSL_SUCCESS) ||
         (!cctx->ctx && ret == -3)) &&
        cctx->ssl) {
        ret = wolfSSL_set_cipher_list(cctx->ssl, value);
    }
    
    WOLFSSL_LEAVE("cmdfunc_cipherstring", ret);
    return ret;
}

/**
 * process curves command
 * @param cctx  a pointer to WOLFSSL_CONF_CTX structure
 * @param value arguments for cmd
 * @return WOLFSSL_SUCCESS on success, 
 *     otherwise WOLFSSL_FAILURE or
 *               -3 if value is null or
 *               negative value on other failure
 */
#if defined(HAVE_ECC)
static int cmdfunc_curves(WOLFSSL_CONF_CTX* cctx, const char* value)
{
    int ret = -3;
    
    WOLFSSL_ENTER("cmdfunc_curves");
    
     /* sanity check */
    if (cctx == NULL)
        return WOLFSSL_FAILURE;
    
    if (value == NULL) {
        WOLFSSL_MSG("bad arguments");
        return ret;
    }
    
    if (cctx->ctx) {
        ret = wolfSSL_CTX_set1_curves_list(cctx->ctx, value);
    }
    
    if (((cctx->ctx  && ret == WOLFSSL_SUCCESS) ||
         (!cctx->ctx && ret == -3)) &&
        cctx->ssl) {
        ret = wolfSSL_set1_curves_list(cctx->ssl, value);
    }
    
    WOLFSSL_LEAVE("cmdfunc_curves", ret);
    return ret;
}
#endif

#ifndef NO_FILESYSTEM
/**
 * process cert command
 * @param cctx  a pointer to WOLFSSL_CONF_CTX structure
 * @param value arguments for cmd
 * @return WOLFSSL_SUCCESS on success, 
 *     otherwise WOLFSSL_FAILURE or
 *               -3 if value is null or
 *               negative value on other failure
 */
static int cmdfunc_cert(WOLFSSL_CONF_CTX* cctx, const char* value)
{
    int ret = -3;
    
    WOLFSSL_ENTER("cmdfunc_cert");
    
    /* sanity check */
    if (cctx == NULL)
        return WOLFSSL_FAILURE;
    
    if (value == NULL) {
        WOLFSSL_MSG("bad arguments");
        return ret;
    }
    
    if (!(cctx->flags & WOLFSSL_CONF_FLAG_CERTIFICATE)) {
        WOLFSSL_MSG("certificate flag is not set");
        return -2;
    }
    
    if (cctx->ctx) {
        ret = wolfSSL_CTX_use_certificate_chain_file(cctx->ctx, value);
    }
    
    if (((cctx->ctx  && ret == WOLFSSL_SUCCESS) ||
         (!cctx->ctx && ret == -3)) &&
        cctx->ssl) {
        ret = wolfSSL_use_certificate_file(cctx->ssl, value, 
                                                    WOLFSSL_FILETYPE_PEM);
    }
    
    WOLFSSL_LEAVE("cmdfunc_cert", ret);
    return ret;
}
/**
 * process key command
 * @param cctx  a pointer to WOLFSSL_CONF_CTX structure
 * @param value arguments for cmd
 * @return WOLFSSL_SUCCESS on success, 
 *     otherwise WOLFSSL_FAILURE or
 *               -3 if value is null or
 *               negative value on other failure
 */
static int cmdfunc_key(WOLFSSL_CONF_CTX* cctx, const char* value)
{
    int ret = -3;
    
    WOLFSSL_ENTER("cmdfunc_key");
    
     /* sanity check */
    if (cctx == NULL)
        return WOLFSSL_FAILURE;
    
    if (value == NULL) {
        WOLFSSL_MSG("bad arguments");
        return ret;
    }
    
    if (!(cctx->flags & WOLFSSL_CONF_FLAG_CERTIFICATE)) {
        WOLFSSL_MSG("certificate flag is not set");
        return -2;
    }
    
    if (cctx->ctx) {
        ret = wolfSSL_CTX_use_PrivateKey_file(cctx->ctx, value, 
                                                    WOLFSSL_FILETYPE_PEM);
    }
    
    if (((cctx->ctx  && ret == WOLFSSL_SUCCESS) ||
         (!cctx->ctx && ret == -3)) &&
        cctx->ssl) {
        ret = wolfSSL_use_PrivateKey_file(cctx->ssl, value, 
                                                    WOLFSSL_FILETYPE_PEM);
    }
    
    WOLFSSL_LEAVE("cmdfunc_key", ret);
    return ret;
}
#endif /* NO_FILESYSTEM */
/**
 * process DH parameter command
 * @param cctx  a pointer to WOLFSSL_CONF_CTX structure
 * @param value arguments for cmd
 * @return WOLFSSL_SUCCESS on success, 
 *     otherwise WOLFSSL_FAILURE or
 *               -3 if value is null or
 *               negative value on other failure
 */
#if !defined(NO_DH) && !defined(NO_BIO)
static int cmdfunc_dhparam(WOLFSSL_CONF_CTX* cctx, const char* value)
{
    int ret = -3;
    WOLFSSL_DH* dh = NULL;
    WOLFSSL_BIO* bio = NULL;
    
    WOLFSSL_MSG("cmdfunc_dhparam");
    
     /* sanity check */
    if (cctx == NULL)
        return WOLFSSL_FAILURE;
    
    if (value == NULL) {
        WOLFSSL_MSG("bad arguments");
        return ret;
    }
    
    if (cctx->ctx || cctx->ssl) {
        bio = wolfSSL_BIO_new_file(value, "rb");
        if (!bio) {
            WOLFSSL_MSG("bio new file failed");
            return WOLFSSL_FAILURE;
        }
        dh = wolfSSL_PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
        if (!dh) {
            wolfSSL_BIO_free(bio);
            WOLFSSL_MSG("PEM read bio failed");
            return WOLFSSL_FAILURE;
        }
    } else {
        return 1;
    }

    if (cctx->ctx) {
        ret = (int)wolfSSL_CTX_set_tmp_dh(cctx->ctx, dh);
    }
    
    if (((cctx->ctx  && ret == WOLFSSL_SUCCESS) ||
         (!cctx->ctx && ret == -3)) &&
        cctx->ssl) {
        ret = (int)wolfSSL_CTX_set_tmp_dh(cctx->ssl->ctx, dh);
    }
    
    if (dh)
        wolfSSL_DH_free(dh);
    if (bio)
        wolfSSL_BIO_free(bio);
        
    WOLFSSL_LEAVE("cmdfunc_dhparam", ret);
    return ret;
}
#endif /* !NO_DH && !NO_BIO */
/**
 * command table
 */
typedef struct conf_cmd_tbl {
    const char* file_cmd;
    const char* cmdline_cmd;
    word32 data_type;
    int (*cmdfunc)(WOLFSSL_CONF_CTX* cctx, const char* value);
}conf_cmd_tbl;

static const conf_cmd_tbl conf_cmds_tbl[] = {
#if defined(HAVE_ECC)
    /* cmd Curves */
    {WOLFSSL_CONF_FILE_CMD1, WOLFSSL_CONF_CMDL_CMD1, 
                                    WOLFSSL_CONF_TYPE_STRING, cmdfunc_curves},
#endif
#if !defined(NO_FILESYSTEM)
    /* cmd Certificate */
    {WOLFSSL_CONF_FILE_CMD2, WOLFSSL_CONF_CMDL_CMD2, 
                                    WOLFSSL_CONF_TYPE_FILE, cmdfunc_cert},
    /* cmd PrivateKey */
    {WOLFSSL_CONF_FILE_CMD3, WOLFSSL_CONF_CMDL_CMD3, 
                                    WOLFSSL_CONF_TYPE_FILE, cmdfunc_key},
#endif
    /* cmd Protocol */
    {WOLFSSL_CONF_FILE_CMD4, WOLFSSL_CONF_CMDL_CMD4, 
                                    WOLFSSL_CONF_TYPE_STRING, NULL},
    /* cmd Options */
    {WOLFSSL_CONF_FILE_CMD5, WOLFSSL_CONF_CMDL_CMD5, 
                                    WOLFSSL_CONF_TYPE_STRING, NULL},
    /* cmd ServerInfoFile */
    {WOLFSSL_CONF_FILE_CMD6, WOLFSSL_CONF_CMDL_CMD6, 
                                    WOLFSSL_CONF_TYPE_FILE, NULL},
    /* cmd SignatureAlgorithms */
    {WOLFSSL_CONF_FILE_CMD7, WOLFSSL_CONF_CMDL_CMD7, 
                                    WOLFSSL_CONF_TYPE_STRING, NULL},
    /* cmd ClientSignatureAlgorithms */
    {WOLFSSL_CONF_FILE_CMD8, WOLFSSL_CONF_CMDL_CMD8, 
                                    WOLFSSL_CONF_TYPE_STRING, NULL},
    /* cmd CipherString */
    {WOLFSSL_CONF_FILE_CMD9, WOLFSSL_CONF_CMDL_CMD9, 
                              WOLFSSL_CONF_TYPE_STRING, cmdfunc_cipherstring},
#if !defined(NO_DH) && !defined(NO_BIO)
    /* cmd DHParameters */
    {WOLFSSL_CONF_FILE_CMD10, WOLFSSL_CONF_CMDL_CMD10, 
                                    WOLFSSL_CONF_TYPE_FILE, cmdfunc_dhparam},
#endif
#ifdef HAVE_ECC
    /* cmd ECHDParameters */
    {WOLFSSL_CONF_FILE_CMD11, WOLFSSL_CONF_CMDL_CMD11, 
                                    WOLFSSL_CONF_TYPE_STRING, NULL},
#endif
};
/* size of command table */
static const size_t size_of_cmd_tbls = sizeof(conf_cmds_tbl) 
                                                    / sizeof(conf_cmd_tbl);

/**
 * send configuration command
 * @param cctx  a pointer to WOLFSSL_CONF_CTX structure
 * @param cmd   configuration command
 * @param value arguments for cmd
 * @return 1 when cmd is recognised, but value is not used
 *         2 both cmd and value are used
 *  otherwise WOLFSSL_FAILURE
 *         -2 if cmd is not recognised
 *         -3 if value is NULL, but cmd is recognized
 */
int wolfSSL_CONF_cmd(WOLFSSL_CONF_CTX* cctx, const char* cmd, const char* value)
{
    int ret = WOLFSSL_FAILURE;
    size_t i = 0;
    size_t cmdlen = 0;
    const char* c = NULL;
    WOLFSSL_ENTER("wolfSSL_CONF_cmd");
    
    (void)cctx;
    (void)cmd;
    (void)value;
    
    /* sanity check */
    if (cctx == NULL || cmd == NULL) {
        WOLFSSL_MSG("bad arguments");
        return ret;
    }
    
    if (cctx->flags & WOLFSSL_CONF_FLAG_CMDLINE) {
        cmdlen = XSTRLEN(cmd);
        
        if (cmdlen < 2) {
            WOLFSSL_MSG("bad cmdline command");
            return -2;
        }
        /* skip "-" prefix */
        c = ++cmd;
    }
    
    for (i = 0; i < size_of_cmd_tbls; i++) {
        /* check if the cmd is valid */
        if (cctx->flags & WOLFSSL_CONF_FLAG_CMDLINE) {
            if (c != NULL && conf_cmds_tbl[i].cmdline_cmd != NULL &&
                XSTRCMP(c, conf_cmds_tbl[i].cmdline_cmd) == 0) {
                if (conf_cmds_tbl[i].cmdfunc != NULL) {
                    ret = conf_cmds_tbl[i].cmdfunc(cctx, value);
                    break;
                } else {
                    WOLFSSL_MSG("cmd not yet implemented");
                    return -2;
                }
            }
        }
        
        if (cctx->flags & WOLFSSL_CONF_FLAG_FILE) {
            if (conf_cmds_tbl[i].file_cmd != NULL &&
                XSTRCMP(cmd, conf_cmds_tbl[i].file_cmd) == 0) {
                if (conf_cmds_tbl[i].cmdfunc != NULL) {
                    ret = conf_cmds_tbl[i].cmdfunc(cctx, value);
                    break;
                } else {
                    WOLFSSL_MSG("cmd not yet implemented");
                    return -2;
                }
            }
        }
    }
    
    if (i == size_of_cmd_tbls) {
        WOLFSSL_MSG("invalid command");
        ret = -2;
    }
    
    /* return code compliant with OpenSSL */
    if (ret < -3)
        ret = 0;
    
    WOLFSSL_LEAVE("wolfSSL_CONF_cmd", ret);
    return ret;
}

#if defined(OPENSSL_EXTRA) && defined(HAVE_SECRET_CALLBACK)
/*
 * This API accepts a user callback which puts key-log records into
 * a KEY LOGFILE. The callback is stored into a CTX and propagated to
 * each SSL object on its creation timing.
 */
void wolfSSL_CTX_set_keylog_callback(WOLFSSL_CTX* ctx, wolfSSL_CTX_keylog_cb_func cb)
{
    WOLFSSL_ENTER("wolfSSL_CTX_set_keylog_callback");
  /* stores the callback into WOLFSSL_CTX */
    if (ctx != NULL) {
        ctx->keyLogCb = cb;
    }
}
wolfSSL_CTX_keylog_cb_func wolfSSL_CTX_get_keylog_callback(
    const WOLFSSL_CTX* ctx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_get_keylog_callback");
    if (ctx != NULL)
        return ctx->keyLogCb;
    else
        return NULL;
}
#endif /* OPENSSL_EXTRA && HAVE_SECRET_CALLBACK */

/**
 * Return DH p, q and g parameters
 * @param dh a pointer to WOLFSSL_DH
 * @param p  a pointer to WOLFSSL_BIGNUM to be obtained from dh
 * @param q  a pointer to WOLFSSL_BIGNUM to be obtained from dh
 * @param q  a pointer to WOLFSSL_BIGNUM to be obtained from dh
 */
void wolfSSL_DH_get0_pqg(const WOLFSSL_DH *dh, const WOLFSSL_BIGNUM **p, 
                    const WOLFSSL_BIGNUM **q, const WOLFSSL_BIGNUM **g)
{
    WOLFSSL_ENTER("wolfSSL_DH_get0_pqg");
    if (dh == NULL)
        return;

    if (p != NULL)
        *p = dh->p;
    if (q != NULL)
        *q = dh->q;
    if (g != NULL)
        *g = dh->g;
}

#endif /* OPENSSL_EXTRA */

/*******************************************************************************
 * START OF standard C library wrapping APIs
 ******************************************************************************/
#if defined(OPENSSL_ALL) || (defined(OPENSSL_EXTRA) && (defined(HAVE_STUNNEL) || \
                             defined(WOLFSSL_NGINX) || defined(HAVE_LIGHTY) || \
                             defined(WOLFSSL_HAPROXY) || defined(WOLFSSL_OPENSSH)))
#ifndef NO_WOLFSSL_STUB
int wolfSSL_CRYPTO_set_mem_ex_functions(void *(*m) (size_t, const char *, int),
                                void *(*r) (void *, size_t, const char *,
                                            int), void (*f) (void *))
{
    (void) m;
    (void) r;
    (void) f;
    WOLFSSL_ENTER("wolfSSL_CRYPTO_set_mem_ex_functions");
    WOLFSSL_STUB("CRYPTO_set_mem_ex_functions");

    return WOLFSSL_FAILURE;
}
#endif
#endif

#if defined(OPENSSL_EXTRA)

/**
 * free allocated memory resouce
 * @param str  a pointer to resource to be freed
 * @param file dummy argument
 * @param line dummy argument
 */
void wolfSSL_CRYPTO_free(void *str, const char *file, int line)
{
    (void)file;
    (void)line;
    XFREE(str, 0, DYNAMIC_TYPE_TMP_BUFFER);
}
/**
 * allocate memory with size of num
 * @param num  size of memory allocation to be malloced
 * @param file dummy argument
 * @param line dummy argument
 * @return a pointer to allocated memory on succssesful, otherwise NULL
 */
void *wolfSSL_CRYPTO_malloc(size_t num, const char *file, int line)
{
    (void)file;
    (void)line;
    return XMALLOC(num, 0, DYNAMIC_TYPE_TMP_BUFFER);
}

size_t wolfSSL_strlcpy(char *dst, const char *src, size_t dstSize)
{
    size_t i;

    if (!dstSize || !dst || !src)
        return 0;

    /* Always have to leave a space for NULL */
    for (i = 0; i < (dstSize - 1) && *src != '\0'; i++) {
        *dst++ = *src++;
    }
    *dst = '\0';

    return i; /* return length without NULL */
}

size_t wolfSSL_strlcat(char *dst, const char *src, size_t dstSize)
{
    size_t dstLen;

    if (!dstSize)
        return 0;

    dstLen = XSTRLEN(dst);

    if (dstSize < dstLen)
        return dstLen + XSTRLEN(src);

    return dstLen + wolfSSL_strlcpy(dst + dstLen, src, dstSize - dstLen);

}

#endif

/*******************************************************************************
 * END OF standard C library wrapping APIs
 ******************************************************************************/

/*******************************************************************************
 * START OF EX_DATA APIs
 ******************************************************************************/
#if defined(OPENSSL_ALL) || (defined(OPENSSL_EXTRA) && (defined(HAVE_STUNNEL) || \
                             defined(WOLFSSL_NGINX) || defined(HAVE_LIGHTY) || \
                             defined(WOLFSSL_HAPROXY) || defined(WOLFSSL_OPENSSH)))
void wolfSSL_CRYPTO_cleanup_all_ex_data(void){
    WOLFSSL_ENTER("CRYPTO_cleanup_all_ex_data");
}
#endif

#if defined(HAVE_EX_DATA) || defined(FORTRESS)
void* wolfSSL_CRYPTO_get_ex_data(const WOLFSSL_CRYPTO_EX_DATA* ex_data, int idx)
{
    WOLFSSL_ENTER("wolfSSL_CTX_get_ex_data");
#ifdef MAX_EX_DATA
    if(ex_data && idx < MAX_EX_DATA && idx >= 0) {
        return ex_data->ex_data[idx];
    }
#else
    (void)ex_data;
    (void)idx;
#endif
    return NULL;
}

int wolfSSL_CRYPTO_set_ex_data(WOLFSSL_CRYPTO_EX_DATA* ex_data, int idx, void *data)
{
    WOLFSSL_ENTER("wolfSSL_CRYPTO_set_ex_data");
#ifdef MAX_EX_DATA
    if (ex_data && idx < MAX_EX_DATA && idx >= 0) {
#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
        if (ex_data->ex_data_cleanup_routines[idx]) {
            if (ex_data->ex_data[idx])
                ex_data->ex_data_cleanup_routines[idx](ex_data->ex_data[idx]);
            ex_data->ex_data_cleanup_routines[idx] = NULL;
        }
#endif
        ex_data->ex_data[idx] = data;
        return WOLFSSL_SUCCESS;
    }
#else
    (void)ex_data;
    (void)idx;
    (void)data;
#endif
    return WOLFSSL_FAILURE;
}

#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
int wolfSSL_CRYPTO_set_ex_data_with_cleanup(
    WOLFSSL_CRYPTO_EX_DATA* ex_data,
    int idx,
    void *data,
    wolfSSL_ex_data_cleanup_routine_t cleanup_routine)
{
    WOLFSSL_ENTER("wolfSSL_CRYPTO_set_ex_data_with_cleanup");
    if (ex_data && idx < MAX_EX_DATA && idx >= 0) {
        if (ex_data->ex_data_cleanup_routines[idx] && ex_data->ex_data[idx])
            ex_data->ex_data_cleanup_routines[idx](ex_data->ex_data[idx]);
        ex_data->ex_data[idx] = data;
        ex_data->ex_data_cleanup_routines[idx] = cleanup_routine;
        return WOLFSSL_SUCCESS;
    }
    return WOLFSSL_FAILURE;
}
#endif /* HAVE_EX_DATA_CLEANUP_HOOKS */

/**
 * Issues unique index for the class specified by class_index.
 * Other parameter except class_index are ignored.
 * Currently, following class_index are accepted:
 *  - CRYPTO_EX_INDEX_SSL
 *  - CRYPTO_EX_INDEX_SSL_CTX
 *  - CRYPTO_EX_INDEX_X509
 * @param class index one of CRYPTO_EX_INDEX_xxx
 * @param argp  parameters to be saved
 * @param argl  parameters to be saved
 * @param new_func a pointer to WOLFSSL_CRYPTO_EX_new
 * @param dup_func a pointer to WOLFSSL_CRYPTO_EX_dup
 * @param free_func a pointer to WOLFSSL_CRYPTO_EX_free
 * @return index value grater or equal to zero on success, -1 on failure.
 */
int wolfSSL_CRYPTO_get_ex_new_index(int class_index, long argl, void *argp,
                                           WOLFSSL_CRYPTO_EX_new* new_func,
                                           WOLFSSL_CRYPTO_EX_dup* dup_func,
                                           WOLFSSL_CRYPTO_EX_free* free_func)
{
    WOLFSSL_ENTER("wolfSSL_CRYPTO_get_ex_new_index");
    (void)argl;
    (void)argp;
    (void)new_func;
    (void)dup_func;
    (void)free_func;

    return get_ex_new_index(class_index);
}
#endif /* HAVE_EX_DATA || FORTRESS */

/*******************************************************************************
 * END OF EX_DATA APIs
 ******************************************************************************/

/*******************************************************************************
 * START OF BUF_MEM API
 ******************************************************************************/

#if defined(OPENSSL_EXTRA)

/* Begin functions for openssl/buffer.h */
WOLFSSL_BUF_MEM* wolfSSL_BUF_MEM_new(void)
{
    WOLFSSL_BUF_MEM* buf;
    buf = (WOLFSSL_BUF_MEM*)XMALLOC(sizeof(WOLFSSL_BUF_MEM), NULL,
                                                        DYNAMIC_TYPE_OPENSSL);
    if (buf) {
        XMEMSET(buf, 0, sizeof(WOLFSSL_BUF_MEM));
    }
    return buf;
}


/* returns length of buffer on success */
int wolfSSL_BUF_MEM_grow(WOLFSSL_BUF_MEM* buf, size_t len)
{
    int len_int = (int)len;
    int mx;

    /* verify provided arguments */
    if (buf == NULL || len_int < 0) {
        return 0; /* BAD_FUNC_ARG; */
    }

    /* check to see if fits in existing length */
    if (buf->length > len) {
        buf->length = len;
        return len_int;
    }

    /* check to see if fits in max buffer */
    if (buf->max >= len) {
        if (buf->data != NULL) {
            XMEMSET(&buf->data[buf->length], 0, len - buf->length);
        }
        buf->length = len;
        return len_int;
    }

    /* expand size, to handle growth */
    mx = (len_int + 3) / 3 * 4;

    /* use realloc */
    buf->data = (char*)XREALLOC(buf->data, mx, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (buf->data == NULL) {
        return 0; /* ERR_R_MALLOC_FAILURE; */
    }

    buf->max = mx;
    XMEMSET(&buf->data[buf->length], 0, len - buf->length);
    buf->length = len;

    return len_int;
}

void wolfSSL_BUF_MEM_free(WOLFSSL_BUF_MEM* buf)
{
    if (buf) {
        if (buf->data) {
            XFREE(buf->data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
            buf->data = NULL;
        }
        buf->max = 0;
        buf->length = 0;
        XFREE(buf, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}
/* End Functions for openssl/buffer.h */

#endif /* OPENSSL_EXTRA */

/*******************************************************************************
 * END OF BUF_MEM API
 ******************************************************************************/

/*******************************************************************************
 * START OF TXT_DB API
 ******************************************************************************/

#if defined(OPENSSL_ALL)
/**
 * This function reads a tab delimetered CSV input and returns
 * a populated WOLFSSL_TXT_DB structure.
 * @param in Tab delimetered CSV input
 * @param num Number of fields in each row.
 * @return
 */
WOLFSSL_TXT_DB *wolfSSL_TXT_DB_read(WOLFSSL_BIO *in, int num)
{
    WOLFSSL_TXT_DB *ret = NULL;
    char *buf = NULL;
    char *bufEnd = NULL;
    char *idx = NULL;
    char* lineEnd = NULL;
    int bufSz;
    int failed = 1;
    /* Space in front of str reserved for field pointers + \0 */
    int fieldsSz = (num + 1) * sizeof(char *);
    WOLFSSL_ENTER("wolfSSL_TXT_DB_read");

    if (!in || num <= 0 || num > WOLFSSL_TXT_DB_MAX_FIELDS) {
        WOLFSSL_MSG("Bad parameter or too many fields");
        return NULL;
    }

    if (!(ret = (WOLFSSL_TXT_DB*)XMALLOC(sizeof(WOLFSSL_TXT_DB), NULL,
            DYNAMIC_TYPE_OPENSSL))) {
        WOLFSSL_MSG("malloc error");
        goto error;
    }
    XMEMSET (ret, 0, sizeof(WOLFSSL_TXT_DB));
    ret->num_fields = num;

    if (!(ret->data = wolfSSL_sk_WOLFSSL_STRING_new())) {
        WOLFSSL_MSG("wolfSSL_sk_WOLFSSL_STRING_new error");
        goto error;
    }

    bufSz = wolfSSL_BIO_get_len(in);
    if (bufSz <= 0 ||
            !(buf = (char*)XMALLOC(bufSz+1, NULL,
                    DYNAMIC_TYPE_TMP_BUFFER))) {
        WOLFSSL_MSG("malloc error or no data in BIO");
        goto error;
    }

    if (wolfSSL_BIO_read(in, buf, bufSz) != bufSz) {
        WOLFSSL_MSG("malloc error or no data in BIO");
        goto error;
    }

    buf[bufSz] = '\0';
    idx = buf;
    for (bufEnd = buf + bufSz; idx < bufEnd; idx = lineEnd + 1) {
        char* strBuf = NULL;
        char** fieldPtr = NULL;
        int fieldPtrIdx = 0;
        char* fieldCheckIdx = NULL;
        lineEnd = XSTRNSTR(idx, "\n", (unsigned int)(bufEnd - idx));
        if (!lineEnd)
            lineEnd = bufEnd;
        if (idx == lineEnd) /* empty line */
            continue;
        if (*idx == '#')
            continue;
        *lineEnd = '\0';
        strBuf = (char*)XMALLOC(fieldsSz + lineEnd - idx + 1, NULL,
                                DYNAMIC_TYPE_OPENSSL);
        if (!strBuf) {
            WOLFSSL_MSG("malloc error");
            goto error;
        }
        XMEMCPY(strBuf + fieldsSz, idx, lineEnd - idx + 1); /* + 1 for NULL */
        XMEMSET(strBuf, 0, fieldsSz);
        /* Check for appropriate number of fields */
        fieldPtr = (char**)strBuf;
        fieldCheckIdx = strBuf + fieldsSz;
        fieldPtr[fieldPtrIdx++] = fieldCheckIdx;
        while (*fieldCheckIdx != '\0') {
            /* Handle escaped tabs */
            if (*fieldCheckIdx == '\t' && fieldCheckIdx[-1] != '\\') {
                fieldPtr[fieldPtrIdx++] = fieldCheckIdx + 1;
                *fieldCheckIdx = '\0';
                if (fieldPtrIdx > num) {
                    WOLFSSL_MSG("too many fields");
                    XFREE(strBuf, NULL, DYNAMIC_TYPE_OPENSSL);
                    goto error;
                }
            }
            fieldCheckIdx++;
        }
        if (fieldPtrIdx != num) {
            WOLFSSL_MSG("wrong number of fields");
            XFREE(strBuf, NULL, DYNAMIC_TYPE_OPENSSL);
            goto error;
        }
        if (wolfSSL_sk_push(ret->data, strBuf) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("wolfSSL_sk_push error");
            XFREE(strBuf, NULL, DYNAMIC_TYPE_OPENSSL);
            goto error;
        }
    }

    failed = 0;
error:
    if (failed && ret) {
        XFREE(ret, NULL, DYNAMIC_TYPE_OPENSSL);
        ret = NULL;
    }
    if (buf) {
        XFREE(buf, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    }
    return ret;
}

long wolfSSL_TXT_DB_write(WOLFSSL_BIO *out, WOLFSSL_TXT_DB *db)
{
    const WOLF_STACK_OF(WOLFSSL_STRING)* data;
    long totalLen = 0;
    char buf[512]; /* Should be more than enough for a single row */
    char* bufEnd = buf + sizeof(buf);
    int sz;
    int i;

    WOLFSSL_ENTER("wolfSSL_TXT_DB_write");

    if (!out || !db || !db->num_fields) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    data = db->data;
    while (data) {
        char** fields = (char**)data->data.string;
        char* idx = buf;

        if (!fields) {
            WOLFSSL_MSG("Missing row");
            return WOLFSSL_FAILURE;
        }

        for (i = 0; i < db->num_fields; i++) {
            const char* fieldValue = fields[i];
            if (!fieldValue) {
                fieldValue = "";
            }

            /* Copy over field escaping tabs */
            while (*fieldValue != '\0') {
                if (idx+1 < bufEnd) {
                    if (*fieldValue == '\t')
                        *idx++ = '\\';
                    *idx++ = *fieldValue++;
                }
                else {
                    WOLFSSL_MSG("Data row is too big");
                    return WOLFSSL_FAILURE;
                }
            }
            if (idx < bufEnd) {
                *idx++ = '\t';
            }
            else {
                WOLFSSL_MSG("Data row is too big");
                return WOLFSSL_FAILURE;
            }
        }
        idx[-1] = '\n';
        sz = (int)(idx - buf);

        if (wolfSSL_BIO_write(out, buf, sz) != sz) {
            WOLFSSL_MSG("wolfSSL_BIO_write error");
            return WOLFSSL_FAILURE;
        }
        totalLen += sz;

        data = data->next;
    }

    return totalLen;
}

int wolfSSL_TXT_DB_insert(WOLFSSL_TXT_DB *db, WOLFSSL_STRING *row)
{
    WOLFSSL_ENTER("wolfSSL_TXT_DB_insert");

    if (!db || !row || !db->data) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    if (wolfSSL_sk_push(db->data, row) != WOLFSSL_SUCCESS) {
        WOLFSSL_MSG("wolfSSL_sk_push error");
        return WOLFSSL_FAILURE;
    }

    return WOLFSSL_SUCCESS;
}

void wolfSSL_TXT_DB_free(WOLFSSL_TXT_DB *db)
{
    WOLFSSL_ENTER("wolfSSL_TXT_DB_free");
    if (db) {
        if (db->data) {
            wolfSSL_sk_free(db->data);
        }
        XFREE(db, NULL, DYNAMIC_TYPE_OPENSSL);
    }
}

int wolfSSL_TXT_DB_create_index(WOLFSSL_TXT_DB *db, int field,
        void* qual, wolf_sk_hash_cb hash, wolf_sk_compare_cb cmp)
{
    WOLFSSL_ENTER("wolfSSL_TXT_DB_create_index");
    (void)qual;

    if (!db || !hash || !cmp || field >= db->num_fields || field < 0) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    db->hash_fn[field] = hash;
    db->comp[field] = cmp;

    return WOLFSSL_SUCCESS;
}

WOLFSSL_STRING *wolfSSL_TXT_DB_get_by_index(WOLFSSL_TXT_DB *db, int idx,
        WOLFSSL_STRING *value)
{
    WOLFSSL_ENTER("wolfSSL_TXT_DB_get_by_index");

    if (!db || !db->data || idx < 0 || idx >= db->num_fields) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    if (!db->hash_fn[idx] || !db->comp[idx]) {
        WOLFSSL_MSG("Missing hash or cmp functions");
        return NULL;
    }

    /* If first data struct has correct hash and cmp function then
     * assume others do too */
    if (db->data->hash_fn != db->hash_fn[idx] ||
            db->data->comp != db->comp[idx]) {
        /* Set the hash and comp functions */
        WOLF_STACK_OF(WOLFSSL_STRING)* data = db->data;
        while (data) {
            if (data->comp != db->comp[idx] ||
                    data->hash_fn != db->hash_fn[idx]) {
                data->comp = db->comp[idx];
                data->hash_fn = db->hash_fn[idx];
                data->hash = 0;
            }
            data= data->next;
        }
    }
    return (WOLFSSL_STRING*) wolfSSL_lh_retrieve(db->data, value);
}
#endif

/*******************************************************************************
 * END OF TXT_DB API
 ******************************************************************************/

#ifndef NO_CERTS

/*******************************************************************************
 * START OF X509_STORE_CTX APIs
 ******************************************************************************/

#ifdef OPENSSL_EXTRA

WOLFSSL_X509_STORE_CTX* wolfSSL_X509_STORE_CTX_new(void)
{
    WOLFSSL_X509_STORE_CTX* ctx;
    WOLFSSL_ENTER("X509_STORE_CTX_new");

    ctx = (WOLFSSL_X509_STORE_CTX*)XMALLOC(sizeof(WOLFSSL_X509_STORE_CTX), NULL,
                                    DYNAMIC_TYPE_X509_CTX);
    if (ctx != NULL) {
        ctx->param = NULL;
        wolfSSL_X509_STORE_CTX_init(ctx, NULL, NULL, NULL);
    }

    return ctx;
}


int wolfSSL_X509_STORE_CTX_init(WOLFSSL_X509_STORE_CTX* ctx,
     WOLFSSL_X509_STORE* store, WOLFSSL_X509* x509, WOLF_STACK_OF(WOLFSSL_X509)* sk)
{
    WOLFSSL_X509* x509_cert;
    int ret = 0;
    (void)sk;
    WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_init");

    if (ctx != NULL) {
        ctx->store = store;
        #ifndef WOLFSSL_X509_STORE_CERTS
        ctx->current_cert = x509;
        #else
        if(x509 != NULL){
            ctx->current_cert = wolfSSL_X509_d2i(NULL, x509->derCert->buffer,x509->derCert->length);
            if(ctx->current_cert == NULL)
                return WOLFSSL_FATAL_ERROR;
        } else
            ctx->current_cert = NULL;
        #endif

        ctx->chain  = sk;
        /* Add intermediate certificates from stack to store */
        while (sk != NULL) {
            x509_cert = sk->data.x509;
            if (x509_cert != NULL && x509_cert->isCa) {
                ret = wolfSSL_X509_STORE_add_cert(store, x509_cert);
                if (ret < 0) {
                    return WOLFSSL_FATAL_ERROR;
                }
            }
            sk = sk->next;
        }

        ctx->sesChain = NULL;
        ctx->domain = NULL;
#if defined(HAVE_EX_DATA) || defined(FORTRESS)
        XMEMSET(&ctx->ex_data, 0, sizeof(ctx->ex_data));
#endif
        ctx->userCtx = NULL;
        ctx->error = 0;
        ctx->error_depth = 0;
        ctx->discardSessionCerts = 0;
#ifdef OPENSSL_EXTRA
        if (ctx->param == NULL) {
            ctx->param = (WOLFSSL_X509_VERIFY_PARAM*)XMALLOC(
                           sizeof(WOLFSSL_X509_VERIFY_PARAM),
                           NULL,DYNAMIC_TYPE_OPENSSL);
            if (ctx->param == NULL){
                WOLFSSL_MSG("wolfSSL_X509_STORE_CTX_init failed");
                return SSL_FATAL_ERROR;
            }
        }
#endif
        return WOLFSSL_SUCCESS;
    }
    return WOLFSSL_FATAL_ERROR;
}


/* free's extra data */
void wolfSSL_X509_STORE_CTX_free(WOLFSSL_X509_STORE_CTX* ctx)
{
    WOLFSSL_ENTER("X509_STORE_CTX_free");
    if (ctx != NULL) {
#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
        wolfSSL_CRYPTO_cleanup_ex_data(&ctx->ex_data);
#endif
    #ifdef OPENSSL_EXTRA
        if (ctx->param != NULL){
            XFREE(ctx->param,NULL,DYNAMIC_TYPE_OPENSSL);
            ctx->param = NULL;
        }
    #endif
        XFREE(ctx, NULL, DYNAMIC_TYPE_X509_CTX);
    }
}


void wolfSSL_X509_STORE_CTX_cleanup(WOLFSSL_X509_STORE_CTX* ctx)
{
    if (ctx != NULL) {
#ifdef OPENSSL_EXTRA
        if (ctx->param != NULL){
            XFREE(ctx->param,NULL,DYNAMIC_TYPE_OPENSSL);
            ctx->param = NULL;
        }
#endif
        wolfSSL_X509_STORE_CTX_init(ctx, NULL, NULL, NULL);
    }
}


void wolfSSL_X509_STORE_CTX_trusted_stack(WOLFSSL_X509_STORE_CTX *ctx, WOLF_STACK_OF(WOLFSSL_X509) *sk)
{
    if (ctx != NULL) {
        ctx->chain = sk;
    }
}


/* Returns corresponding X509 error from internal ASN error <e> */
static int GetX509Error(int e)
{
    switch (e) {
        case ASN_BEFORE_DATE_E:
            return X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD;
        case ASN_AFTER_DATE_E:
            return X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD;
        case ASN_NO_SIGNER_E:
            return X509_V_ERR_INVALID_CA;
        case ASN_SELF_SIGNED_E:
            return X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT;
        case ASN_PATHLEN_INV_E:
        case ASN_PATHLEN_SIZE_E:
            return X509_V_ERR_PATH_LENGTH_EXCEEDED;
        case ASN_SIG_OID_E:
        case ASN_SIG_CONFIRM_E:
        case ASN_SIG_HASH_E:
        case ASN_SIG_KEY_E:
            return X509_V_ERR_CERT_SIGNATURE_FAILURE;
        default:
            WOLFSSL_MSG("Error not configured or implemented yet");
            return e;
    }
}

/* Verifies certificate chain using WOLFSSL_X509_STORE_CTX
 * returns 0 on success or < 0 on failure.
 */
int wolfSSL_X509_verify_cert(WOLFSSL_X509_STORE_CTX* ctx)
{
    int ret = 0;
    int depth = 0;
    int error;
#ifndef NO_ASN_TIME
    byte *afterDate, *beforeDate;
#endif

    WOLFSSL_ENTER("wolfSSL_X509_verify_cert");

    if (ctx != NULL && ctx->store != NULL && ctx->store->cm != NULL
         && ctx->current_cert != NULL && ctx->current_cert->derCert != NULL) {
            ret = wolfSSL_CertManagerVerifyBuffer(ctx->store->cm,
                    ctx->current_cert->derCert->buffer,
                    ctx->current_cert->derCert->length,
                    WOLFSSL_FILETYPE_ASN1);

        /* If there was an error, process it and add it to CTX */
        if (ret < 0) {
            /* Get corresponding X509 error */
            error = GetX509Error(ret);
            /* Set error depth */
            if (ctx->chain)
                depth = (int)ctx->chain->num;

            wolfSSL_X509_STORE_CTX_set_error(ctx, error);
            wolfSSL_X509_STORE_CTX_set_error_depth(ctx, depth);
        #if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
            if (ctx->store && ctx->store->verify_cb)
                ctx->store->verify_cb(0, ctx);
        #endif
        }

    #ifndef NO_ASN_TIME
        error = 0;
        /* wolfSSL_CertManagerVerifyBuffer only returns ASN_AFTER_DATE_E or
         ASN_BEFORE_DATE_E if there are no additional errors found in the
         cert. Therefore, check if the cert is expired or not yet valid
         in order to return the correct expected error. */
        afterDate = ctx->current_cert->notAfter.data;
        beforeDate = ctx->current_cert->notBefore.data;

        if (XVALIDATE_DATE(afterDate, (byte)ctx->current_cert->notAfter.type,
                                                                   AFTER) < 1) {
            error = X509_V_ERR_CERT_HAS_EXPIRED;
        }
        else if (XVALIDATE_DATE(beforeDate,
                    (byte)ctx->current_cert->notBefore.type, BEFORE) < 1) {
            error = X509_V_ERR_CERT_NOT_YET_VALID;
        }

        if (error != 0 ) {
            wolfSSL_X509_STORE_CTX_set_error(ctx, error);
            wolfSSL_X509_STORE_CTX_set_error_depth(ctx, depth);
        #if defined(OPENSSL_ALL) || defined(WOLFSSL_QT)
            if (ctx->store && ctx->store->verify_cb)
                ctx->store->verify_cb(0, ctx);
        #endif
        }
    #endif

        /* OpenSSL returns 0 when a chain can't be built */
        if (ret == ASN_NO_SIGNER_E)
            return WOLFSSL_FAILURE;
        else
            return ret;
    }
    return WOLFSSL_FATAL_ERROR;
}

#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
    WOLFSSL_X509* wolfSSL_X509_STORE_CTX_get_current_cert(
                                                    WOLFSSL_X509_STORE_CTX* ctx)
    {
        WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_get_current_cert");
        if (ctx)
            return ctx->current_cert;
        return NULL;
    }


    int wolfSSL_X509_STORE_CTX_get_error(WOLFSSL_X509_STORE_CTX* ctx)
    {
        WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_get_error");
        if (ctx != NULL)
            return ctx->error;
        return 0;
    }


    int wolfSSL_X509_STORE_CTX_get_error_depth(WOLFSSL_X509_STORE_CTX* ctx)
    {
        WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_get_error_depth");
        if(ctx)
            return ctx->error_depth;
        return WOLFSSL_FATAL_ERROR;
    }

/* get X509_STORE_CTX ex_data, max idx is MAX_EX_DATA */
void* wolfSSL_X509_STORE_CTX_get_ex_data(WOLFSSL_X509_STORE_CTX* ctx, int idx)
{
    WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_get_ex_data");
#if defined(HAVE_EX_DATA) || defined(FORTRESS)
    if (ctx != NULL) {
        return wolfSSL_CRYPTO_get_ex_data(&ctx->ex_data, idx);
    }
#else
    (void)ctx;
    (void)idx;
#endif
    return NULL;
}
#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#ifdef OPENSSL_EXTRA
    void wolfSSL_X509_STORE_CTX_set_verify_cb(WOLFSSL_X509_STORE_CTX *ctx,
                                  WOLFSSL_X509_STORE_CTX_verify_cb verify_cb)
    {
        WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_set_verify_cb");
        if(ctx == NULL)
            return;
        ctx->verify_cb = verify_cb;
    }

/* Gets pointer to X509_STORE that was used to create context.
 *
 * Return valid pointer on success, NULL if ctx was NULL or not initialized
 */
WOLFSSL_X509_STORE* wolfSSL_X509_STORE_CTX_get0_store(
        WOLFSSL_X509_STORE_CTX* ctx)
{
    WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_get0_store");

    if (ctx == NULL)
        return NULL;

    return ctx->store;
}

WOLFSSL_X509* wolfSSL_X509_STORE_CTX_get0_cert(WOLFSSL_X509_STORE_CTX* ctx)
{
    if (ctx == NULL)
        return NULL;

    return ctx->current_cert;
}

void wolfSSL_X509_STORE_CTX_set_time(WOLFSSL_X509_STORE_CTX* ctx,
                                    unsigned long flags,
                                    time_t t)
{
    (void)flags;

    if (ctx == NULL || ctx->param == NULL)
        return;

    ctx->param->check_time = t;
    ctx->param->flags |= WOLFSSL_USE_CHECK_TIME;
}

#if defined(WOLFSSL_QT) || defined(OPENSSL_ALL)
#ifndef NO_WOLFSSL_STUB
int wolfSSL_X509_STORE_CTX_set_purpose(WOLFSSL_X509_STORE_CTX *ctx,
                                       int purpose)
{
    (void)ctx;
    (void)purpose;
    WOLFSSL_STUB("wolfSSL_X509_STORE_CTX_set_purpose");
    return 0;
}
#endif
#endif /* WOLFSSL_QT || OPENSSL_ALL */
#endif /* OPENSSL_EXTRA */

#ifdef OPENSSL_EXTRA

/* set X509_STORE_CTX ex_data, max idx is MAX_EX_DATA. Return WOLFSSL_SUCCESS
 * on success, WOLFSSL_FAILURE on error. */
int wolfSSL_X509_STORE_CTX_set_ex_data(WOLFSSL_X509_STORE_CTX* ctx, int idx,
                                       void *data)
{
    WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_set_ex_data");
#if defined(HAVE_EX_DATA) || defined(FORTRESS)
    if (ctx != NULL)
    {
        return wolfSSL_CRYPTO_set_ex_data(&ctx->ex_data, idx, data);
    }
#else
    (void)ctx;
    (void)idx;
    (void)data;
#endif
    return WOLFSSL_FAILURE;
}

#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
/* set X509_STORE_CTX ex_data, max idx is MAX_EX_DATA. Return WOLFSSL_SUCCESS
 * on success, WOLFSSL_FAILURE on error. */
int wolfSSL_X509_STORE_CTX_set_ex_data_with_cleanup(
    WOLFSSL_X509_STORE_CTX* ctx,
    int idx,
    void *data,
    wolfSSL_ex_data_cleanup_routine_t cleanup_routine)
{
    WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_set_ex_data_with_cleanup");
    if (ctx != NULL)
    {
        return wolfSSL_CRYPTO_set_ex_data_with_cleanup(&ctx->ex_data, idx, data,
                                                       cleanup_routine);
    }
    return WOLFSSL_FAILURE;
}
#endif /* HAVE_EX_DATA_CLEANUP_HOOKS */

#if defined(WOLFSSL_APACHE_HTTPD) || defined(OPENSSL_ALL)
void wolfSSL_X509_STORE_CTX_set_depth(WOLFSSL_X509_STORE_CTX* ctx, int depth)
{
    WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_set_depth");
    if (ctx)
        ctx->depth = depth;
}
#endif


WOLFSSL_X509* wolfSSL_X509_STORE_CTX_get0_current_issuer(
        WOLFSSL_X509_STORE_CTX* ctx)
{
    int ret;
    WOLFSSL_X509* issuer;

    WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_get0_current_issuer");

    if (ctx == NULL) {
        return NULL;
    }

    ret = wolfSSL_X509_STORE_CTX_get1_issuer(&issuer, ctx, ctx->current_cert);
    if (ret == WOLFSSL_SUCCESS) {
        return issuer;
    }

    return NULL;
}

/* Set an error stat in the X509 STORE CTX
 *
 */
void wolfSSL_X509_STORE_CTX_set_error(WOLFSSL_X509_STORE_CTX* ctx, int er)
{
    WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_set_error");

    if (ctx != NULL) {
        ctx->error = er;
    }
}

/* Set the error depth in the X509 STORE CTX */
void wolfSSL_X509_STORE_CTX_set_error_depth(WOLFSSL_X509_STORE_CTX* ctx,
                                                                      int depth)
{
    WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_set_error_depth");

    if (ctx != NULL) {
        ctx->error_depth = depth;
    }
}

WOLFSSL_STACK* wolfSSL_X509_STORE_CTX_get_chain(WOLFSSL_X509_STORE_CTX* ctx)
{
    WOLFSSL_ENTER("wolfSSL_X509_STORE_CTX_get_chain");

    if (ctx == NULL) {
        return NULL;
    }

#ifdef SESSION_CERTS
    /* if chain is null but sesChain is available then populate stack */
    if (ctx->chain == NULL && ctx->sesChain != NULL) {
        int i;
        WOLFSSL_X509_CHAIN* c = ctx->sesChain;
        WOLFSSL_STACK*     sk = (WOLFSSL_STACK*)XMALLOC(sizeof(WOLFSSL_STACK),
                                    NULL, DYNAMIC_TYPE_X509);

        if (sk == NULL) {
            return NULL;
        }

        XMEMSET(sk, 0, sizeof(WOLFSSL_STACK));

        for (i = 0; i < c->count && i < MAX_CHAIN_DEPTH; i++) {
            WOLFSSL_X509* x509 = wolfSSL_get_chain_X509(c, i);

            if (x509 == NULL) {
                WOLFSSL_MSG("Unable to get x509 from chain");
                wolfSSL_sk_X509_free(sk);
                return NULL;
            }

            if (wolfSSL_sk_X509_push(sk, x509) != WOLFSSL_SUCCESS) {
                WOLFSSL_MSG("Unable to load x509 into stack");
                wolfSSL_sk_X509_free(sk);
                wolfSSL_X509_free(x509);
                return NULL;
            }
        }

#if defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY) || defined(OPENSSL_EXTRA)
        /* add CA used to verify top of chain to the list */
        if (c->count > 0) {
            WOLFSSL_X509* x509 = wolfSSL_get_chain_X509(c, c->count - 1);
            if (x509 != NULL) {
                WOLFSSL_X509* issuer = NULL;
                if (wolfSSL_X509_STORE_CTX_get1_issuer(&issuer, ctx, x509)
                        == WOLFSSL_SUCCESS) {
                    /* check that the certificate being looked up is not self
                     * signed and that a issuer was found */
                    if (issuer != NULL && wolfSSL_X509_NAME_cmp(&x509->issuer,
                                &x509->subject) != 0) {
                        if (wolfSSL_sk_X509_push(sk, issuer) != WOLFSSL_SUCCESS) {
                            WOLFSSL_MSG("Unable to load CA x509 into stack");
                            wolfSSL_sk_X509_free(sk);
                            wolfSSL_X509_free(issuer);
                            return NULL;
                        }
                    }
                    else {
                        WOLFSSL_MSG("Certificate is self signed");
                        if (issuer != NULL)
                            wolfSSL_X509_free(issuer);
                    }
                }
                else {
                    WOLFSSL_MSG("Could not find CA for certificate");
                }
            }
        }
#endif
        ctx->chain = sk;
    }
#endif /* SESSION_CERTS */

    return ctx->chain;
}

/* like X509_STORE_CTX_get_chain(), but return a copy with data reference
   counts increased */
WOLFSSL_STACK* wolfSSL_X509_STORE_CTX_get1_chain(WOLFSSL_X509_STORE_CTX* ctx)
{
    WOLFSSL_STACK* ref;

    if (ctx == NULL) {
        return NULL;
    }

    /* get chain in ctx */
    ref = wolfSSL_X509_STORE_CTX_get_chain(ctx);
    if (ref == NULL) {
        return ref;
    }

    /* create duplicate of ctx chain */
    return wolfSSL_sk_dup(ref);
}

#ifndef NO_WOLFSSL_STUB
WOLFSSL_X509_STORE_CTX *wolfSSL_X509_STORE_CTX_get0_parent_ctx(
                                                   WOLFSSL_X509_STORE_CTX *ctx)
{
    (void)ctx;
    WOLFSSL_STUB("wolfSSL_X509_STORE_CTX_get0_parent_ctx");
    return NULL;
}
#endif

#ifndef NO_WOLFSSL_STUB
int wolfSSL_X509_STORE_get_by_subject(WOLFSSL_X509_STORE_CTX* ctx, int idx,
                            WOLFSSL_X509_NAME* name, WOLFSSL_X509_OBJECT* obj)
{
    (void)ctx;
    (void)idx;
    (void)name;
    (void)obj;
    WOLFSSL_STUB("X509_STORE_get_by_subject");
    return 0;
}
#endif

#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_EXTRA) && !defined(NO_FILESYSTEM)
#if defined(WOLFSSL_SIGNER_DER_CERT)
WOLF_STACK_OF(WOLFSSL_X509)* wolfSSL_X509_STORE_get1_certs(
    WOLFSSL_X509_STORE_CTX* ctx, WOLFSSL_X509_NAME* name)
{
    WOLF_STACK_OF(WOLFSSL_X509)* ret = NULL;
    int err = 0;
    WOLFSSL_X509_STORE* store = NULL;
    WOLFSSL_STACK* sk = NULL;
    WOLFSSL_STACK* certToFilter = NULL;
    WOLFSSL_X509_NAME* certToFilterName = NULL;
    WOLF_STACK_OF(WOLFSSL_X509)* filteredCerts = NULL;
    WOLFSSL_X509* filteredCert = NULL;
    
    WOLFSSL_ENTER("wolfSSL_X509_STORE_get1_certs");

    if (name == NULL) {
        err = 1;
    }

    if (err == 0) {
        store = wolfSSL_X509_STORE_CTX_get0_store(ctx);
        if (store == NULL) {
            err = 1;
        }
    }

    if (err == 0) {
        filteredCerts = wolfSSL_sk_X509_new();
        if (filteredCerts == NULL) {
            err = 1;
        }
    }

    if (err == 0) {
        sk = wolfSSL_CertManagerGetCerts(store->cm);
        if (sk == NULL) {
            err = 1;
        }
    }

    if (err == 0) {
        certToFilter = sk;
        while (certToFilter != NULL) {
            certToFilterName = wolfSSL_X509_get_subject_name(
                                    certToFilter->data.x509);
            if (certToFilterName != NULL) {
                if (wolfSSL_X509_NAME_cmp(certToFilterName, name) == 0) {
                    filteredCert = wolfSSL_X509_dup(certToFilter->data.x509);
                    if (filteredCert == NULL) {
                        err = 1;
                        break;
                    }
                    else {
                        wolfSSL_sk_X509_push(filteredCerts, filteredCert);
                    }
                }
            }
            certToFilter = certToFilter->next;
        }
    }

    if (err == 1) {
        if (filteredCerts != NULL) {
            wolfSSL_sk_X509_free(filteredCerts);
        }
        ret = NULL;
    }
    else {
        ret = filteredCerts;
    }

    if (sk != NULL) {
        wolfSSL_sk_X509_free(sk);
    }

    return ret;
}
#endif /* WOLFSSL_SIGNER_DER_CERT */

/******************************************************************************
* wolfSSL_X509_STORE_GetCerts - retrieve stack of X509 in a certificate store ctx
*
* This API can be used in SSL verify callback function to view cert chain
* See examples/client/client.c and myVerify() function in test.h
*
* RETURNS:
* returns stack of X509 certs on success, otherwise returns a NULL.
*/
WOLFSSL_STACK* wolfSSL_X509_STORE_GetCerts(WOLFSSL_X509_STORE_CTX* s)
{
    int  certIdx = 0;
    WOLFSSL_BUFFER_INFO* cert = NULL;
    DecodedCert* dCert = NULL;
    WOLFSSL_X509* x509 = NULL;
    WOLFSSL_STACK* sk = NULL;
    int found = 0;

    if (s == NULL) {
        return NULL;
    }

    sk = wolfSSL_sk_X509_new();

    if (sk == NULL) {
        return NULL;
    }

    for (certIdx = s->totalCerts - 1; certIdx >= 0; certIdx--) {
        /* get certificate buffer */
        cert = &s->certs[certIdx];

        dCert = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL, DYNAMIC_TYPE_DCERT);

        if (dCert == NULL) {
            goto error;
        }
        XMEMSET(dCert, 0, sizeof(DecodedCert));

        InitDecodedCert(dCert, cert->buffer, cert->length, NULL);

        /* Parse Certificate */
        if (ParseCert(dCert, CERT_TYPE, NO_VERIFY, NULL)){
            goto error;
        }
        x509 = wolfSSL_X509_new();

        if (x509 == NULL) {
            goto error;
        }
        InitX509(x509, 1, NULL);

        if (CopyDecodedToX509(x509, dCert) == 0) {

            if (wolfSSL_sk_X509_push(sk, x509) != WOLFSSL_SUCCESS) {
                WOLFSSL_MSG("Unable to load x509 into stack");
                wolfSSL_X509_free(x509);
                goto error;
            }
        }
        else {
            goto error;
        }
        found = 1;

        FreeDecodedCert(dCert);
        XFREE(dCert, NULL, DYNAMIC_TYPE_DCERT);
        dCert = NULL;
    }

    if (!found) {
        wolfSSL_sk_X509_free(sk);
        sk = NULL;
    }
    return sk;

error:
    if (dCert) {
        FreeDecodedCert(dCert);
        XFREE(dCert, NULL, DYNAMIC_TYPE_DCERT);
    }

    if (sk)
        wolfSSL_sk_X509_free(sk);

    return NULL;
}
#endif /* OPENSSL_EXTRA && !NO_FILESYSTEM */

#if defined(WOLFSSL_NGINX) || defined(WOLFSSL_HAPROXY) || \
    defined(OPENSSL_EXTRA) || defined(OPENSSL_ALL)
int wolfSSL_X509_STORE_CTX_get1_issuer(WOLFSSL_X509 **issuer,
    WOLFSSL_X509_STORE_CTX *ctx, WOLFSSL_X509 *x)
{
    WOLFSSL_STACK* node;

    if (issuer == NULL || ctx == NULL || x == NULL)
        return WOLFSSL_FATAL_ERROR;

    if (ctx->chain != NULL) {
        for (node = ctx->chain; node != NULL; node = node->next) {
            if (wolfSSL_X509_check_issued(node->data.x509, x) == X509_V_OK) {
                *issuer = x;
                return WOLFSSL_SUCCESS;
            }
        }
    }

    /* Result is ignored when passed to wolfSSL_OCSP_cert_to_id(). */

    return x509GetIssuerFromCM(issuer, ctx->store->cm, x);
}
#endif /* WOLFSSL_NGINX || WOLFSSL_HAPROXY || OPENSSL_EXTRA || OPENSSL_ALL */

/*******************************************************************************
 * END OF X509_STORE_CTX APIs
 ******************************************************************************/

/*******************************************************************************
 * START OF X509_STORE APIs
 ******************************************************************************/

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
WOLFSSL_X509_STORE* wolfSSL_X509_STORE_new(void)
{
    WOLFSSL_X509_STORE* store = NULL;
    WOLFSSL_ENTER("SSL_X509_STORE_new");

    if ((store = (WOLFSSL_X509_STORE*)XMALLOC(sizeof(WOLFSSL_X509_STORE), NULL,
                                    DYNAMIC_TYPE_X509_STORE)) == NULL)
        goto err_exit;

    XMEMSET(store, 0, sizeof(WOLFSSL_X509_STORE));
    store->isDynamic = 1;

    if ((store->cm = wolfSSL_CertManagerNew()) == NULL)
        goto err_exit;

#ifdef HAVE_CRL
    store->crl = store->cm->crl;
#endif

#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
    if ((store->param = (WOLFSSL_X509_VERIFY_PARAM*)XMALLOC(
                           sizeof(WOLFSSL_X509_VERIFY_PARAM),
                           NULL, DYNAMIC_TYPE_OPENSSL)) == NULL) {
        goto err_exit;
    }
    XMEMSET(store->param, 0, sizeof(WOLFSSL_X509_VERIFY_PARAM));
    if ((store->lookup.dirs = (WOLFSSL_BY_DIR*)XMALLOC(sizeof(WOLFSSL_BY_DIR),
                           NULL, DYNAMIC_TYPE_OPENSSL)) == NULL) {
        WOLFSSL_MSG("store->lookup.dir memory allocation error");
        goto err_exit;
    }
    XMEMSET(store->lookup.dirs, 0, sizeof(WOLFSSL_BY_DIR));
    if (wc_InitMutex(&store->lookup.dirs->lock) != 0) {
            WOLFSSL_MSG("Bad mutex init");
            goto err_exit;
    }
#endif

    return store;

err_exit:
    if (store == NULL)
        return NULL;

    wolfSSL_X509_STORE_free(store);

    return NULL;
}

void wolfSSL_X509_STORE_free(WOLFSSL_X509_STORE* store)
{
    if (store == NULL)
        return;

#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
    wolfSSL_CRYPTO_cleanup_ex_data(&store->ex_data);
#endif

    if (store->isDynamic) {
        if (store->cm != NULL) {
            wolfSSL_CertManagerFree(store->cm);
            store->cm = NULL;
        }
#if defined(OPENSSL_EXTRA) || defined(WOLFSSL_WPAS_SMALL)
        if (store->param != NULL) {
            XFREE(store->param, NULL, DYNAMIC_TYPE_OPENSSL);
            store->param = NULL;
        }

        if (store->lookup.dirs != NULL) {
#if defined(OPENSSL_ALL) && !defined(NO_FILESYSTEM) && !defined(NO_WOLFSSL_DIR)
            if (store->lookup.dirs->dir_entry) {
                wolfSSL_sk_BY_DIR_entry_free(store->lookup.dirs->dir_entry);
            }
#endif
            wc_FreeMutex(&store->lookup.dirs->lock);
            XFREE(store->lookup.dirs, NULL, DYNAMIC_TYPE_OPENSSL);
            store->lookup.dirs = NULL;
        }
#endif
        XFREE(store, NULL, DYNAMIC_TYPE_X509_STORE);
    }
}

/**
 * Get ex_data in WOLFSSL_STORE at given index
 * @param store a pointer to WOLFSSL_X509_STORE structure
 * @param idx   Index of ex_data to get data from 
 * @return void pointer to ex_data on success or NULL on failure
 */
void* wolfSSL_X509_STORE_get_ex_data(WOLFSSL_X509_STORE* store, int idx)
{
    WOLFSSL_ENTER("wolfSSL_X509_STORE_get_ex_data");
#ifdef HAVE_EX_DATA
    if (store != NULL && idx < MAX_EX_DATA && idx >= 0) {
        return wolfSSL_CRYPTO_get_ex_data(&store->ex_data, idx);
    }
#else
    (void)store;
    (void)idx;
#endif
    return NULL;
}

/**
 * Set ex_data for WOLFSSL_STORE
 * @param store a pointer to WOLFSSL_X509_STORE structure
 * @param idx   Index of ex data to set
 * @param data  Data to set in ex data
 * @return WOLFSSL_SUCCESS on success or WOLFSSL_FAILURE on failure
 */
int wolfSSL_X509_STORE_set_ex_data(WOLFSSL_X509_STORE* store, int idx, 
                                                                     void *data)
{
    WOLFSSL_ENTER("wolfSSL_X509_STORE_set_ex_data");
#ifdef HAVE_EX_DATA
    if (store != NULL && idx < MAX_EX_DATA) {
        return wolfSSL_CRYPTO_set_ex_data(&store->ex_data, idx, data);
    }
#else
    (void)store;
    (void)idx;
    (void)data;
#endif
    return WOLFSSL_FAILURE;
}

#ifdef HAVE_EX_DATA_CLEANUP_HOOKS
/**
 * Set ex_data for WOLFSSL_STORE
 * @param store a pointer to WOLFSSL_X509_STORE structure
 * @param idx   Index of ex data to set
 * @param data  Data to set in ex data
 * @return WOLFSSL_SUCCESS on success or WOLFSSL_FAILURE on failure
 */
int wolfSSL_X509_STORE_set_ex_data_with_cleanup(
    WOLFSSL_X509_STORE* store,
    int idx,
    void *data,
    wolfSSL_ex_data_cleanup_routine_t cleanup_routine)
{
    WOLFSSL_ENTER("wolfSSL_X509_STORE_set_ex_data_with_cleanup");
    if (store != NULL && idx < MAX_EX_DATA) {
        return wolfSSL_CRYPTO_set_ex_data_with_cleanup(&store->ex_data, idx,
                                                       data, cleanup_routine);
    }
    return WOLFSSL_FAILURE;
}

#endif /* HAVE_EX_DATA_CLEANUP_HOOKS */

#endif /* OPENSSL_EXTRA || WOLFSSL_WPAS_SMALL */

#ifdef OPENSSL_EXTRA

#if defined(WOLFSSL_QT) || defined(OPENSSL_ALL)
    void wolfSSL_X509_STORE_set_verify_cb(WOLFSSL_X509_STORE *st,
                                 WOLFSSL_X509_STORE_CTX_verify_cb verify_cb)
    {
        WOLFSSL_ENTER("WOLFSSL_X509_STORE_set_verify_cb");
        if (st != NULL) {
            st->verify_cb = verify_cb;
        }
    }
#endif /* WOLFSSL_QT || OPENSSL_ALL */

WOLFSSL_X509_LOOKUP* wolfSSL_X509_STORE_add_lookup(WOLFSSL_X509_STORE* store,
                                               WOLFSSL_X509_LOOKUP_METHOD* m)
{
    WOLFSSL_ENTER("SSL_X509_STORE_add_lookup");
    if (store == NULL || m == NULL)
        return NULL;

    /* Make sure the lookup has a back reference to the store. */
    store->lookup.store = store;
    /* store a type to know which method wants to be used for */
    store->lookup.type = m->type;
    return &store->lookup;
}

int wolfSSL_X509_STORE_add_cert(WOLFSSL_X509_STORE* store, WOLFSSL_X509* x509)
{
    int result = WOLFSSL_FATAL_ERROR;

    WOLFSSL_ENTER("wolfSSL_X509_STORE_add_cert");
    if (store != NULL && store->cm != NULL && x509 != NULL
                                                && x509->derCert != NULL) {
        DerBuffer* derCert = NULL;

        result = AllocDer(&derCert, x509->derCert->length,
            x509->derCert->type, NULL);
        if (result == 0) {
            /* AddCA() frees the buffer. */
            XMEMCPY(derCert->buffer,
                            x509->derCert->buffer, x509->derCert->length);
            result = AddCA(store->cm, &derCert, WOLFSSL_USER_CA, VERIFY);
        }
    }

    WOLFSSL_LEAVE("wolfSSL_X509_STORE_add_cert", result);

    if (result != WOLFSSL_SUCCESS) {
        result = WOLFSSL_FATAL_ERROR;
    }

    return result;
}

int wolfSSL_X509_STORE_set_flags(WOLFSSL_X509_STORE* store, unsigned long flag)
{
    int ret = WOLFSSL_SUCCESS;

    WOLFSSL_ENTER("wolfSSL_X509_STORE_set_flags");

    if (store == NULL)
        return WOLFSSL_FAILURE;

    if ((flag & WOLFSSL_CRL_CHECKALL) || (flag & WOLFSSL_CRL_CHECK)) {
        ret = wolfSSL_CertManagerEnableCRL(store->cm, (int)flag);
    }

    return ret;
}


int wolfSSL_X509_STORE_set_default_paths(WOLFSSL_X509_STORE* store)
{
    (void)store;
    return WOLFSSL_SUCCESS;
}

#if !defined(NO_FILESYSTEM) && !defined(NO_WOLFSSL_DIR)
/* Loads certificate(s) files in pem format into X509_STORE struct from either
 * a file or directory.
 * Returns WOLFSSL_SUCCESS on success or WOLFSSL_FAILURE if an error occurs.
 */
WOLFSSL_API int wolfSSL_X509_STORE_load_locations(WOLFSSL_X509_STORE *str,
                                              const char *file, const char *dir)
{
    WOLFSSL_CTX* ctx;
    char *name = NULL;
    int ret = WOLFSSL_SUCCESS;
    int successes = 0;
#ifdef WOLFSSL_SMALL_STACK
    ReadDirCtx* readCtx = NULL;
#else
    ReadDirCtx  readCtx[1];
#endif

    WOLFSSL_ENTER("X509_STORE_load_locations");

    if (str == NULL || str->cm == NULL || (file == NULL  && dir == NULL))
        return WOLFSSL_FAILURE;

    /* tmp ctx for setting our cert manager */
    ctx = wolfSSL_CTX_new(cm_pick_method());
    if (ctx == NULL)
        return WOLFSSL_FAILURE;

    wolfSSL_CertManagerFree(ctx->cm);
    ctx->cm = str->cm;

#ifdef HAVE_CRL
    if (str->cm->crl == NULL) {
        if (wolfSSL_CertManagerEnableCRL(str->cm, 0) != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Enable CRL failed");
            wolfSSL_CTX_free(ctx);
            return WOLFSSL_FAILURE;
        }
    }
#endif

    /* Load individual file */
    if (file) {
        /* Try to process file with type DETECT_CERT_TYPE to parse the
           correct certificate header and footer type */
        ret = ProcessFile(ctx, file, WOLFSSL_FILETYPE_PEM, DETECT_CERT_TYPE,
                                                      NULL, 0, str->cm->crl, 0);
        if (ret != WOLFSSL_SUCCESS) {
            WOLFSSL_MSG("Failed to load file");
            ret = WOLFSSL_FAILURE;
        }
    }

    /* Load files in dir */
    if (dir && ret == WOLFSSL_SUCCESS) {
        #ifdef WOLFSSL_SMALL_STACK
            readCtx = (ReadDirCtx*)XMALLOC(sizeof(ReadDirCtx), ctx->heap,
                                                       DYNAMIC_TYPE_TMP_BUFFER);
            if (readCtx == NULL) {
                WOLFSSL_MSG("Memory error");
                wolfSSL_CTX_free(ctx);
                return WOLFSSL_FAILURE;
            }
        #endif

        /* try to load each regular file in dir */
        ret = wc_ReadDirFirst(readCtx, dir, &name);
        while (ret == 0 && name) {
            WOLFSSL_MSG(name);
            /* Try to process file with type DETECT_CERT_TYPE to parse the
               correct certificate header and footer type */
            ret = ProcessFile(ctx, name, WOLFSSL_FILETYPE_PEM, DETECT_CERT_TYPE,
                                                      NULL, 0, str->cm->crl, 0);
            /* Not failing on load errors */
            if (ret != WOLFSSL_SUCCESS)
                WOLFSSL_MSG("Failed to load file in path, continuing");
            else
                successes++;

            ret = wc_ReadDirNext(readCtx, dir, &name);
        }
        wc_ReadDirClose(readCtx);

        /* Success if at least one file in dir was loaded */
        if (successes > 0)
            ret = WOLFSSL_SUCCESS;
        else {
            WOLFSSL_ERROR(ret);
            ret = WOLFSSL_FAILURE;
        }

        #ifdef WOLFSSL_SMALL_STACK
            XFREE(readCtx, ctx->heap, DYNAMIC_TYPE_DIRCTX);
        #endif
    }

    ctx->cm = NULL;
    wolfSSL_CTX_free(ctx);

    return ret;
}
#endif /* !NO_FILESYSTEM && !NO_WOLFSSL_DIR */

int wolfSSL_X509_CA_num(WOLFSSL_X509_STORE* store)
{
    int i = 0;
    int cnt_ret = 0;
    Signer **table;

    WOLFSSL_ENTER("wolfSSL_X509_CA_num");
    if (store == NULL || store->cm == NULL){
        WOLFSSL_MSG("invalid parameter");
        return WOLFSSL_FAILURE;
    }

    table = store->cm->caTable;
    if (table){
        if (wc_LockMutex(&store->cm->caLock) == 0){
            for (i = 0; i < CA_TABLE_SIZE; i++) {
                Signer* signer = table[i];
                while (signer) {
                    Signer* next = signer->next;
                    cnt_ret++;
                    signer = next;
                }
            }
            wc_UnLockMutex(&store->cm->caLock);
        }
    }

    return cnt_ret;
}

#endif /* OPENSSL_EXTRA */

#if defined(OPENSSL_ALL) || (defined(OPENSSL_EXTRA) && (defined(HAVE_STUNNEL) || \
                             defined(WOLFSSL_NGINX) || defined(HAVE_LIGHTY) || \
                             defined(WOLFSSL_HAPROXY) || defined(WOLFSSL_OPENSSH)))

#ifndef NO_WOLFSSL_STUB
WOLF_STACK_OF(WOLFSSL_X509_OBJECT)* wolfSSL_X509_STORE_get0_objects(
    WOLFSSL_X509_STORE* store)
{
    WOLFSSL_ENTER("wolfSSL_X509_STORE_get0_objects");
    WOLFSSL_STUB("wolfSSL_X509_STORE_get0_objects");
    (void)store;
    return NULL;
}
#endif /* NO_WOLFSSL_STUB */

#endif /* OPENSSL_ALL || (OPENSSL_EXTRA && HAVE_STUNNEL) || WOLFSSL_NGINX ||
        * HAVE_LIGHTY || WOLFSSL_HAPROXY || WOLFSSL_OPENSSH */

/*******************************************************************************
 * END OF X509_STORE APIs
 ******************************************************************************/

/*******************************************************************************
 * START OF PKCS7 APIs
 ******************************************************************************/
#ifdef HAVE_PKCS7

#ifdef OPENSSL_ALL
PKCS7* wolfSSL_PKCS7_new(void)
{
    WOLFSSL_PKCS7* pkcs7;
    int ret = 0;

    pkcs7 = (WOLFSSL_PKCS7*)XMALLOC(sizeof(*pkcs7), NULL, DYNAMIC_TYPE_PKCS7);
    if (pkcs7 != NULL) {
        XMEMSET(pkcs7, 0, sizeof(*pkcs7));
        ret = wc_PKCS7_Init(&pkcs7->pkcs7, NULL, INVALID_DEVID);
    }

    if (ret != 0 && pkcs7 != NULL) {
        XFREE(pkcs7, NULL, DYNAMIC_TYPE_PKCS7);
        pkcs7 = NULL;
    }

    return (PKCS7*)pkcs7;
}

/******************************************************************************
* wolfSSL_PKCS7_SIGNED_new - allocates PKCS7 and initialize it for a signed data
*
* RETURNS:
* returns pointer to the PKCS7 structure on success, otherwise returns NULL
*/
PKCS7_SIGNED* wolfSSL_PKCS7_SIGNED_new(void)
{
    byte signedData[]= { 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x07, 0x02};
    PKCS7* pkcs7 = NULL;

    if ((pkcs7 = wolfSSL_PKCS7_new()) == NULL)
        return NULL;
    pkcs7->contentOID = SIGNED_DATA;
    if ((wc_PKCS7_SetContentType(pkcs7, signedData, sizeof(signedData))) < 0) {
        if (pkcs7) {
            wolfSSL_PKCS7_free(pkcs7);
            return NULL;
        }
    }
    return pkcs7;
}

void wolfSSL_PKCS7_free(PKCS7* pkcs7)
{
    WOLFSSL_PKCS7* p7 = (WOLFSSL_PKCS7*)pkcs7;

    if (p7 != NULL) {
        if (p7->data != NULL)
            XFREE(p7->data, NULL, DYNAMIC_TYPE_PKCS7);
        wc_PKCS7_Free(&p7->pkcs7);
        if (p7->certs)
            wolfSSL_sk_free(p7->certs);
        XFREE(p7, NULL, DYNAMIC_TYPE_PKCS7);
    }
}

void wolfSSL_PKCS7_SIGNED_free(PKCS7_SIGNED* p7)
{
    wolfSSL_PKCS7_free(p7);
    return;
}

PKCS7* wolfSSL_d2i_PKCS7(PKCS7** p7, const unsigned char** in, int len)
{
    return wolfSSL_d2i_PKCS7_ex(p7, in, len, NULL, 0);
}

/*****************************************************************************
* wolfSSL_d2i_PKCS7_ex - Converts the given unsigned char buffer of size len
* into a PKCS7 object.  Optionally, accepts a byte buffer of content which
* is stored as the PKCS7 object's content, to support detached signatures.
* @param content The content which is signed, in case the signature is
*                detached.  Ignored if NULL.
* @param contentSz The size of the passed in content.
*
* RETURNS:
* returns pointer to a PKCS7 structure on success, otherwise returns NULL
*/
PKCS7* wolfSSL_d2i_PKCS7_ex(PKCS7** p7, const unsigned char** in, int len,
        byte* content, word32 contentSz)
{
    WOLFSSL_PKCS7* pkcs7 = NULL;
    word32 idx = 0;

    WOLFSSL_ENTER("wolfSSL_d2i_PKCS7_ex");

    if (in == NULL || *in == NULL)
        return NULL;

    if ((pkcs7 = (WOLFSSL_PKCS7*)wolfSSL_PKCS7_new()) == NULL)
        return NULL;

    if (GetSequence(*in, &idx, &pkcs7->len, len) < 0) {
        wolfSSL_PKCS7_free((PKCS7*)pkcs7);
        return NULL;
    }
    pkcs7->len += idx;

    pkcs7->data = (byte*)XMALLOC(pkcs7->len, NULL, DYNAMIC_TYPE_PKCS7);
    if (pkcs7->data == NULL) {
        wolfSSL_PKCS7_free((PKCS7*)pkcs7);
        return NULL;
    }
    XMEMCPY(pkcs7->data, *in, pkcs7->len);

    if (content != NULL) {
        pkcs7->pkcs7.content = content;
        pkcs7->pkcs7.contentSz = contentSz;
    }
    if (wc_PKCS7_VerifySignedData(&pkcs7->pkcs7, pkcs7->data, pkcs7->len)
                                                                         != 0) {
        wolfSSL_PKCS7_free((PKCS7*)pkcs7);
        return NULL;
    }

    if (p7 != NULL)
        *p7 = (PKCS7*)pkcs7;
    *in += pkcs7->len;
    return (PKCS7*)pkcs7;
}

/**
 * This API was added as a helper function for libest. It
 * extracts a stack of certificates from the pkcs7 object.
 * @param pkcs7 PKCS7 parameter object
 * @return WOLFSSL_STACK_OF(WOLFSSL_X509)*
 */
WOLFSSL_STACK* wolfSSL_PKCS7_to_stack(PKCS7* pkcs7)
{
    int i;
    WOLFSSL_PKCS7* p7 = (WOLFSSL_PKCS7*)pkcs7;
    WOLF_STACK_OF(WOLFSSL_X509)* ret = NULL;

    WOLFSSL_ENTER("wolfSSL_PKCS7_to_stack");

    if (!p7) {
        WOLFSSL_MSG("Bad parameter");
        return NULL;
    }

    if (p7->certs)
        return p7->certs;

    for (i = 0; i < MAX_PKCS7_CERTS && p7->pkcs7.cert[i]; i++) {
        WOLFSSL_X509* x509 = wolfSSL_X509_d2i(NULL, p7->pkcs7.cert[i],
            p7->pkcs7.certSz[i]);
        if (!ret)
            ret = wolfSSL_sk_X509_new();
        if (x509) {
            if (wolfSSL_sk_X509_push(ret, x509) != WOLFSSL_SUCCESS) {
                wolfSSL_X509_free(x509);
                WOLFSSL_MSG("wolfSSL_sk_X509_push error");
                goto error;
            }
        }
        else {
            WOLFSSL_MSG("wolfSSL_X509_d2i error");
            goto error;
        }
    }

    /* Save stack to free later */
    if (p7->certs)
        wolfSSL_sk_free(p7->certs);
    p7->certs = ret;

    return ret;
error:
    if (ret) {
        wolfSSL_sk_free(ret);
    }
    return NULL;
}

WOLFSSL_STACK* wolfSSL_PKCS7_get0_signers(PKCS7* pkcs7, WOLFSSL_STACK* certs,
                                          int flags)
{
    WOLFSSL_STACK* signers = NULL;
    WOLFSSL_PKCS7* p7 = (WOLFSSL_PKCS7*)pkcs7;

    if (p7 == NULL)
        return NULL;
    /* Only PKCS#7 messages with a single cert that is the verifying certificate
     * is supported.
     */
    if ((flags | PKCS7_NOINTERN) == PKCS7_NOINTERN)
        return NULL;

    signers = (WOLFSSL_STACK*)XMALLOC(sizeof(WOLFSSL_STACK), NULL,
        DYNAMIC_TYPE_X509);
    if (signers == NULL)
        return NULL;

    signers->num = 1;
    signers->data.x509 = (WOLFSSL_X509*)XMALLOC(sizeof(WOLFSSL_X509), NULL,
        DYNAMIC_TYPE_X509);
    if (signers->data.x509 == NULL) {
        XFREE(signers, NULL, DYNAMIC_TYPE_X509);
        return NULL;
    }

    if (DecodeToX509(signers->data.x509, p7->pkcs7.singleCert,
                                                 p7->pkcs7.singleCertSz) != 0) {
        XFREE(signers->data.x509, NULL, DYNAMIC_TYPE_X509);
        XFREE(signers, NULL, DYNAMIC_TYPE_X509);
        return NULL;
    }

    (void)certs;

    return signers;
}

#ifndef NO_BIO

PKCS7* wolfSSL_d2i_PKCS7_bio(WOLFSSL_BIO* bio, PKCS7** p7)
{
    WOLFSSL_PKCS7* pkcs7;
    int ret;

    WOLFSSL_ENTER("wolfSSL_d2i_PKCS7_bio");

    if (bio == NULL)
        return NULL;

    if ((pkcs7 = (WOLFSSL_PKCS7*)wolfSSL_PKCS7_new()) == NULL)
        return NULL;

    pkcs7->len = wolfSSL_BIO_get_len(bio);
    pkcs7->data = (byte*)XMALLOC(pkcs7->len, NULL, DYNAMIC_TYPE_PKCS7);
    if (pkcs7->data == NULL) {
        wolfSSL_PKCS7_free((PKCS7*)pkcs7);
        return NULL;
    }

    if ((ret = wolfSSL_BIO_read(bio, pkcs7->data, pkcs7->len)) <= 0) {
        wolfSSL_PKCS7_free((PKCS7*)pkcs7);
        return NULL;
    }
    /* pkcs7->len may change if using b64 for example */
    pkcs7->len = ret;

    if (wc_PKCS7_VerifySignedData(&pkcs7->pkcs7, pkcs7->data, pkcs7->len)
                                                                         != 0) {
        wolfSSL_PKCS7_free((PKCS7*)pkcs7);
        return NULL;
    }

    if (p7 != NULL)
        *p7 = (PKCS7*)pkcs7;
    return (PKCS7*)pkcs7;
}

int wolfSSL_i2d_PKCS7_bio(WOLFSSL_BIO *bio, PKCS7 *p7)
{
    byte* output = NULL;
    int len;
    WC_RNG rng;
    int ret = WOLFSSL_FAILURE;
    WOLFSSL_ENTER("wolfSSL_i2d_PKCS7_bio");

    if (!bio || !p7) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    if (!p7->rng) {
        if (wc_InitRng(&rng) != 0) {
            WOLFSSL_MSG("wc_InitRng error");
            return WOLFSSL_FAILURE;
        }
        p7->rng = &rng;
    }

    if ((len = wc_PKCS7_EncodeSignedData(p7, NULL, 0)) < 0) {
        WOLFSSL_MSG("wc_PKCS7_EncodeSignedData error");
        goto cleanup;
    }

    output = (byte*)XMALLOC(len, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (!output) {
        WOLFSSL_MSG("malloc error");
        goto cleanup;
    }

    if ((len = wc_PKCS7_EncodeSignedData(p7, output, len)) < 0) {
        WOLFSSL_MSG("wc_PKCS7_EncodeSignedData error");
        goto cleanup;
    }

    if (wolfSSL_BIO_write(bio, output, len) <= 0) {
        WOLFSSL_MSG("wolfSSL_BIO_write error");
        goto cleanup;
    }

    ret = WOLFSSL_SUCCESS;
cleanup:
    if (p7->rng == &rng) {
        wc_FreeRng(&rng);
        p7->rng = NULL;
    }
    if (output) {
        XFREE(output, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    }
    return ret;
}

int wolfSSL_PKCS7_verify(PKCS7* pkcs7, WOLFSSL_STACK* certs,
        WOLFSSL_X509_STORE* store, WOLFSSL_BIO* in, WOLFSSL_BIO* out, int flags)
{
    int ret = 0;
    unsigned char* mem = NULL;
    int memSz = 0;
    WOLFSSL_PKCS7* p7 = (WOLFSSL_PKCS7*)pkcs7;

    WOLFSSL_ENTER("wolfSSL_PKCS7_verify");

    if (pkcs7 == NULL)
        return WOLFSSL_FAILURE;

    if (in != NULL) {
        if ((memSz = wolfSSL_BIO_get_mem_data(in, &mem)) < 0)
            return WOLFSSL_FAILURE;

        p7->pkcs7.content = mem;
        p7->pkcs7.contentSz = memSz;
    }

    /* certs is the list of certificates to find the cert with issuer/serial. */
    (void)certs;
    /* store is the certificate store to use to verify signer certificate
     * associated with the signers.
     */
    (void)store;

    ret = wc_PKCS7_VerifySignedData(&p7->pkcs7, p7->data, p7->len);
    if (ret != 0)
        return WOLFSSL_FAILURE;

    if ((flags & PKCS7_NOVERIFY) != PKCS7_NOVERIFY) {
        /* All signer certificates are verified. */
        return WOLFSSL_FAILURE;
    }

    if (out != NULL)
       wolfSSL_BIO_write(out, p7->pkcs7.content, p7->pkcs7.contentSz);

    return WOLFSSL_SUCCESS;
}

/**
 * This API was added as a helper function for libest. It
 * encodes a stack of certificates to pkcs7 format.
 * @param pkcs7 PKCS7 parameter object
 * @param certs WOLFSSL_STACK_OF(WOLFSSL_X509)*
 * @param out   Output bio
 * @return WOLFSSL_SUCCESS on success and WOLFSSL_FAILURE on failure
 */
int wolfSSL_PKCS7_encode_certs(PKCS7* pkcs7, WOLFSSL_STACK* certs,
        WOLFSSL_BIO* out)
{
    int ret;
    WOLFSSL_PKCS7* p7;
    WOLFSSL_ENTER("wolfSSL_PKCS7_encode_certs");

    if (!pkcs7 || !certs || !out) {
        WOLFSSL_MSG("Bad parameter");
        return WOLFSSL_FAILURE;
    }

    p7 = (WOLFSSL_PKCS7*)pkcs7;

    /* take ownership of certs */
    p7->certs = certs;

    if (pkcs7->certList) {
        WOLFSSL_MSG("wolfSSL_PKCS7_encode_certs called multiple times on same "
                    "struct");
        return WOLFSSL_FAILURE;
    }

    if (certs) {
        /* Save some of the values */
        int hashOID = pkcs7->hashOID;
        byte version = pkcs7->version;

        if (!certs->data.x509 || !certs->data.x509->derCert) {
            WOLFSSL_MSG("Missing cert");
            return WOLFSSL_FAILURE;
        }

        if (wc_PKCS7_InitWithCert(pkcs7, certs->data.x509->derCert->buffer,
                                      certs->data.x509->derCert->length) != 0) {
            WOLFSSL_MSG("wc_PKCS7_InitWithCert error");
            return WOLFSSL_FAILURE;
        }
        certs = certs->next;

        pkcs7->hashOID = hashOID;
        pkcs7->version = version;
    }

    /* Add the certs to the PKCS7 struct */
    while (certs) {
        if (!certs->data.x509 || !certs->data.x509->derCert) {
            WOLFSSL_MSG("Missing cert");
            return WOLFSSL_FAILURE;
        }
        if (wc_PKCS7_AddCertificate(pkcs7, certs->data.x509->derCert->buffer,
                                      certs->data.x509->derCert->length) != 0) {
            WOLFSSL_MSG("wc_PKCS7_AddCertificate error");
            return WOLFSSL_FAILURE;
        }
        certs = certs->next;
    }

    if (wc_PKCS7_SetSignerIdentifierType(pkcs7, DEGENERATE_SID) != 0) {
        WOLFSSL_MSG("wc_PKCS7_SetSignerIdentifierType error");
        return WOLFSSL_FAILURE;
    }

    ret = wolfSSL_i2d_PKCS7_bio(out, pkcs7);

    return ret;
}

/******************************************************************************
* wolfSSL_PEM_write_bio_PKCS7 - writes the PKCS7 data to BIO
*
* RETURNS:
* returns WOLFSSL_SUCCESS on success, otherwise returns WOLFSSL_FAILURE
*/
int wolfSSL_PEM_write_bio_PKCS7(WOLFSSL_BIO* bio, PKCS7* p7)
{
#ifdef WOLFSSL_SMALL_STACK
    byte* outputHead;
    byte* outputFoot;
#else
    byte outputHead[2048];
    byte outputFoot[2048];
#endif
    word32 outputHeadSz = 2048;
    word32 outputFootSz = 2048;
    word32 outputSz = 0;
    byte*  output = NULL;
    byte*  pem = NULL;
    int    pemSz = -1;
    enum wc_HashType hashType;
    byte hashBuf[WC_MAX_DIGEST_SIZE];
    word32 hashSz = -1;

    WOLFSSL_ENTER("wolfSSL_PEM_write_bio_PKCS7()");

    if (bio == NULL || p7 == NULL)
        return WOLFSSL_FAILURE;

#ifdef WOLFSSL_SMALL_STACK
    outputHead = (byte*)XMALLOC(outputHeadSz, bio->heap,
        DYNAMIC_TYPE_TMP_BUFFER);
    if (outputHead == NULL)
        return MEMORY_E;

    outputFoot = (byte*)XMALLOC(outputFootSz, bio->heap,
        DYNAMIC_TYPE_TMP_BUFFER);
    if (outputFoot == NULL)
        goto error;

#endif

    XMEMSET(hashBuf, 0, WC_MAX_DIGEST_SIZE);
    XMEMSET(outputHead, 0, outputHeadSz);
    XMEMSET(outputFoot, 0, outputFootSz);

    hashType = wc_OidGetHash(p7->hashOID);
    hashSz = wc_HashGetDigestSize(hashType);
    if (hashSz > WC_MAX_DIGEST_SIZE)
        return WOLFSSL_FAILURE;

    /* only SIGNED_DATA is supported */
    switch (p7->contentOID) {
        case SIGNED_DATA:
            break;
        default:
            WOLFSSL_MSG("Unknown PKCS#7 Type");
            return WOLFSSL_FAILURE;
    };

    if ((wc_PKCS7_EncodeSignedData_ex(p7, hashBuf, hashSz,
        outputHead, &outputHeadSz, outputFoot, &outputFootSz)) != 0)
        return WOLFSSL_FAILURE;

    outputSz = outputHeadSz + p7->contentSz + outputFootSz;
    output = (byte*)XMALLOC(outputSz, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);

    if (!output)
         return WOLFSSL_FAILURE;

    XMEMSET(output, 0, outputSz);
    outputSz = 0;
    XMEMCPY(&output[outputSz], outputHead, outputHeadSz);
    outputSz += outputHeadSz;
    XMEMCPY(&output[outputSz], p7->content, p7->contentSz);
    outputSz += p7->contentSz;
    XMEMCPY(&output[outputSz], outputFoot, outputFootSz);
    outputSz += outputFootSz;

    /* get PEM size */
    pemSz = wc_DerToPemEx(output, outputSz, NULL, 0, NULL, CERT_TYPE);
    if (pemSz < 0)
        goto error;

    pemSz++; /* for '\0'*/

    /* create PEM buffer and convert from DER to PEM*/
    if ((pem = (byte*)XMALLOC(pemSz, bio->heap, DYNAMIC_TYPE_TMP_BUFFER))
                                                                        == NULL)
        goto error;

    XMEMSET(pem, 0, pemSz);

    if (wc_DerToPemEx(output, outputSz, pem, pemSz, NULL, CERT_TYPE) < 0) {
        goto error;
    }
    if ((wolfSSL_BIO_write(bio, pem, pemSz) == pemSz)) {
        XFREE(output, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
        XFREE(pem, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
#ifdef WOLFSSL_SMALL_STACK
        XFREE(outputHead, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
        XFREE(outputFoot, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
#endif
        return WOLFSSL_SUCCESS;
    }

error:
#ifdef WOLFSSL_SMALL_STACK
    if (outputHead) {
        XFREE(outputHead, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    }
    if (outputFoot) {
        XFREE(outputFoot, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    }
#endif
    if (output) {
        XFREE(output, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    }
    if (pem) {
        XFREE(pem, bio->heap, DYNAMIC_TYPE_TMP_BUFFER);
    }
    return WOLFSSL_FAILURE;
}

#ifdef HAVE_SMIME
/*****************************************************************************
* wolfSSL_SMIME_read_PKCS7 - Reads the given S/MIME message and parses it into
* a PKCS7 object. In case of a multipart message, stores the signed data in
* bcont.
*
* RETURNS:
* returns pointer to a PKCS7 structure on success, otherwise returns NULL
*/
WOLFSSL_API PKCS7* wolfSSL_SMIME_read_PKCS7(WOLFSSL_BIO* in,
        WOLFSSL_BIO** bcont)
{
    MimeHdr* allHdrs = NULL;
    MimeHdr* curHdr = NULL;
    MimeParam* curParam = NULL;
    int inLen = 0;
    byte* bcontMem = NULL;
    int bcontMemSz = 0;
    int sectionLen = 0;
    int ret = -1;
    char* section = NULL;
    char* canonLine = NULL;
    char* canonSection = NULL;
    PKCS7* pkcs7 = NULL;
    word32 outLen = 0;
    byte* out = NULL;
    byte* outHead = NULL;

    int canonPos = 0;
    int lineLen = 0;
    int remainLen = 0;
    byte isEnd = 0;
    size_t canonSize = 0;
    size_t boundLen = 0;
    char* boundary = NULL;

    static const char* kContType = "Content-Type";
    static const char* kCTE = "Content-Transfer-Encoding";
    static const char* kMultSigned = "multipart/signed";
    static const char* kAppPkcsSign = "application/pkcs7-signature";
    static const char* kAppXPkcsSign = "application/x-pkcs7-signature";
    static const char* kAppPkcs7Mime = "application/pkcs7-mime";
    static const char* kAppXPkcs7Mime = "application/x-pkcs7-mime";


    if (in == NULL || bcont == NULL) {
        goto error;
    }
    inLen = wolfSSL_BIO_get_len(in);
    if (inLen <= 0) {
        goto error;
    }
    remainLen = wolfSSL_BIO_get_len(in);
    if (remainLen <= 0) {
        goto error;
    }

    section = (char*)XMALLOC(remainLen+1, NULL, DYNAMIC_TYPE_PKCS7);
    if (section == NULL) {
        goto error;
    }
    lineLen = wolfSSL_BIO_gets(in, section, remainLen);
    if (lineLen <= 0) {
        goto error;
    }
    while (isEnd == 0 && remainLen > 0) {
        sectionLen += lineLen;
        remainLen -= lineLen;
        lineLen = wolfSSL_BIO_gets(in, &section[sectionLen], remainLen);
        if (lineLen <= 0) {
            goto error;
        }
        /* Line with just newline signals end of headers. */
        if ((lineLen==2 && !XSTRNCMP(&section[sectionLen],
                                     "\r\n", 2)) ||
            (lineLen==1 && (section[sectionLen] == '\r' ||
                            section[sectionLen] == '\n'))) {
            isEnd = 1;
        }
    }
    section[sectionLen] = '\0';
    ret = wc_MIME_parse_headers(section, sectionLen, &allHdrs);
    if (ret < 0) {
        WOLFSSL_MSG("Parsing MIME headers failed.\n");
        goto error;
    }
    isEnd = 0;
    section[0] = '\0';
    sectionLen = 0;

    curHdr = wc_MIME_find_header_name(kContType, allHdrs);
    if (curHdr && !XSTRNCMP(curHdr->body, kMultSigned,
                            XSTR_SIZEOF(kMultSigned))) {
        curParam = wc_MIME_find_param_attr("protocol", curHdr->params);
        if (curParam && (!XSTRNCMP(curParam->value, kAppPkcsSign,
                                   XSTR_SIZEOF(kAppPkcsSign)) ||
                         !XSTRNCMP(curParam->value, kAppXPkcsSign,
                                   XSTR_SIZEOF(kAppXPkcsSign)))) {
            curParam = wc_MIME_find_param_attr("boundary", curHdr->params);
            if (curParam == NULL) {
                goto error;
            }

            boundLen = XSTRLEN(curParam->value) + 2;
            boundary = (char*)XMALLOC(boundLen+1, NULL, DYNAMIC_TYPE_PKCS7);
            if (boundary == NULL) {
                goto error;
            }
            XMEMSET(boundary, 0, (word32)(boundLen+1));
            boundary[0] = boundary[1] = '-';
            XSTRNCPY(&boundary[2], curParam->value, boundLen-2);

            /* Parse up to first boundary, ignore everything here. */
            lineLen = wolfSSL_BIO_gets(in, section, remainLen);
            if (lineLen <= 0) {
                goto error;
            }
            while (XSTRNCMP(&section[sectionLen], boundary, boundLen) &&
                   remainLen > 0) {
                sectionLen += lineLen;
                remainLen -= lineLen;
                lineLen = wolfSSL_BIO_gets(in, &section[sectionLen],
                                           remainLen);
                if (lineLen <= 0) {
                    goto error;
                }
            }

            section[0] = '\0';
            sectionLen = 0;
            canonSize = remainLen + 1;
            canonSection = (char*)XMALLOC(canonSize, NULL,
                                          DYNAMIC_TYPE_PKCS7);
            if (canonSection == NULL) {
                goto error;
            }

            lineLen = wolfSSL_BIO_gets(in, section, remainLen);
            while (XSTRNCMP(&section[sectionLen], boundary, boundLen) &&
                            remainLen > 0) {
                canonLine = wc_MIME_canonicalize(&section[sectionLen]);
                if (canonLine == NULL) {
                    goto error;
                }
                /* If line endings were added, the initial length may be
                 * exceeded. */
                if ((canonPos + XSTRLEN(canonLine) + 1) >= canonSize) {
                    canonSize = canonPos + XSTRLEN(canonLine) + 1;
                    canonSection = (char*)XREALLOC(canonSection, canonSize,
                                                   NULL, DYNAMIC_TYPE_PKCS7);
                    if (canonSection == NULL) {
                        goto error;
                    }
                }
                XMEMCPY(&canonSection[canonPos], canonLine,
                        (int)XSTRLEN(canonLine));
                canonPos += XSTRLEN(canonLine);
                XFREE(canonLine, NULL, DYNAMIC_TYPE_PKCS7);
                canonLine = NULL;

                sectionLen += lineLen;
                remainLen -= lineLen;

                lineLen = wolfSSL_BIO_gets(in, &section[sectionLen],
                                           remainLen);
                if (lineLen <= 0) {
                    goto error;
                }
            }

            if (canonPos > 0) {
                canonPos--;
            }

            /* Strip the final trailing newline.  Support \r, \n or \r\n. */
            if (canonSection[canonPos] == '\n') {
                if (canonPos > 0) {
                    canonPos--;
                }
            }

            if (canonSection[canonPos] == '\r') {
                if (canonPos > 0) {
                    canonPos--;
                }
            }

            canonSection[canonPos+1] = '\0';

            *bcont = wolfSSL_BIO_new(wolfSSL_BIO_s_mem());
            ret = wolfSSL_BIO_write(*bcont, canonSection,
                                    (int)XSTRLEN(canonSection));
            if (ret != (int)XSTRLEN(canonSection)) {
                goto error;
            }
            if ((bcontMemSz = wolfSSL_BIO_get_mem_data(*bcont, &bcontMem))
                                                                          < 0) {
                goto error;
            }
            XFREE(canonSection, NULL, DYNAMIC_TYPE_PKCS7);
            canonSection = NULL;


            wc_MIME_free_hdrs(allHdrs);
            allHdrs = NULL;
            section[0] = '\0';
            sectionLen = 0;
            lineLen = wolfSSL_BIO_gets(in, section, remainLen);
            if (lineLen <= 0) {
                goto error;
            }
            while (isEnd == 0 && remainLen > 0) {
                sectionLen += lineLen;
                remainLen -= lineLen;
                lineLen = wolfSSL_BIO_gets(in, &section[sectionLen],
                                           remainLen);
                if (lineLen <= 0) {
                    goto error;
                }
                /* Line with just newline signals end of headers. */
                if ((lineLen==2 && !XSTRNCMP(&section[sectionLen],
                                             "\r\n", 2)) ||
                    (lineLen==1 && (section[sectionLen] == '\r' ||
                                    section[sectionLen] == '\n'))) {
                    isEnd = 1;
                }
            }
            section[sectionLen] = '\0';
            ret = wc_MIME_parse_headers(section, sectionLen, &allHdrs);
            if (ret < 0) {
                WOLFSSL_MSG("Parsing MIME headers failed.\n");
                goto error;
            }
            curHdr = wc_MIME_find_header_name(kContType, allHdrs);
            if (curHdr == NULL || (XSTRNCMP(curHdr->body, kAppPkcsSign,
                                   XSTR_SIZEOF(kAppPkcsSign)) &&
                                   XSTRNCMP(curHdr->body, kAppXPkcsSign,
                                   XSTR_SIZEOF(kAppXPkcsSign)))) {
                WOLFSSL_MSG("S/MIME headers not found inside "
                            "multipart message.\n");
                goto error;
            }

            section[0] = '\0';
            sectionLen = 0;
            lineLen = wolfSSL_BIO_gets(in, section, remainLen);
            while (XSTRNCMP(&section[sectionLen], boundary, boundLen) &&
                   remainLen > 0) {
                sectionLen += lineLen;
                remainLen -= lineLen;
                lineLen = wolfSSL_BIO_gets(in, &section[sectionLen],
                                           remainLen);
                if (lineLen <= 0) {
                    goto error;
                }
            }

            XFREE(boundary, NULL, DYNAMIC_TYPE_PKCS7);
            boundary = NULL;
        }
    }
    else if (curHdr && (!XSTRNCMP(curHdr->body, kAppPkcs7Mime,
                                  XSTR_SIZEOF(kAppPkcs7Mime)) ||
                        !XSTRNCMP(curHdr->body, kAppXPkcs7Mime,
                                  XSTR_SIZEOF(kAppXPkcs7Mime)))) {
        sectionLen = wolfSSL_BIO_get_len(in);
        if (sectionLen <= 0) {
            goto error;
        }
        ret = wolfSSL_BIO_read(in, section, sectionLen);
        if (ret < 0 || ret != sectionLen) {
            WOLFSSL_MSG("Error reading input BIO.\n");
            goto error;
        }
    }
    else {
        WOLFSSL_MSG("S/MIME headers not found.\n");
        goto error;
    }

    curHdr = wc_MIME_find_header_name(kCTE, allHdrs);
    if (curHdr == NULL) {
        WOLFSSL_MSG("Content-Transfer-Encoding header not found, "
                    "assuming base64 encoding.");
    }
    else if (XSTRNCMP(curHdr->body, "base64", XSTRLEN("base64"))) {
        WOLFSSL_MSG("S/MIME encodings other than base64 are not "
                    "currently supported.\n");
        goto error;
    }

    if (section == NULL || sectionLen <= 0) {
        goto error;
    }
    outLen = ((sectionLen*3+3)/4)+1;
    out = (byte*)XMALLOC(outLen*sizeof(byte), NULL, DYNAMIC_TYPE_PKCS7);
    outHead = out;
    if (outHead == NULL) {
        goto error;
    }
    /* Strip trailing newlines. */
    while ((sectionLen > 0) &&
           (section[sectionLen-1] == '\r' || section[sectionLen-1] == '\n')) {
        sectionLen--;
    }
    section[sectionLen] = '\0';
    ret = Base64_Decode((const byte*)section, sectionLen, out, &outLen);
    if (ret < 0) {
        WOLFSSL_MSG("Error base64 decoding S/MIME message.\n");
        goto error;
    }
    pkcs7 = wolfSSL_d2i_PKCS7_ex(NULL, (const unsigned char**)&out, outLen,
        bcontMem, bcontMemSz);

    wc_MIME_free_hdrs(allHdrs);
    XFREE(outHead, NULL, DYNAMIC_TYPE_PKCS7);
    XFREE(section, NULL, DYNAMIC_TYPE_PKCS7);

    return pkcs7;

error:
    wc_MIME_free_hdrs(allHdrs);
    XFREE(boundary, NULL, DYNAMIC_TYPE_PKCS7);
    XFREE(outHead, NULL, DYNAMIC_TYPE_PKCS7);
    XFREE(section, NULL, DYNAMIC_TYPE_PKCS7);
    if (canonSection != NULL)
        XFREE(canonSection, NULL, DYNAMIC_TYPE_PKCS7);
    if (bcont) {
        wolfSSL_BIO_free(*bcont);
        *bcont = NULL; /* reset 'bcount' pointer to NULL on failure */
    }

    return NULL;
}
#endif /* HAVE_SMIME */
#endif /* !NO_BIO */
#endif /* OPENSSL_ALL */

#endif /* HAVE_PKCS7 */
/*******************************************************************************
 * END OF PKCS7 APIs
 ******************************************************************************/

/*******************************************************************************
 * START OF PKCS12 APIs
 ******************************************************************************/
#ifdef OPENSSL_EXTRA

/* no-op function. Was initially used for adding encryption algorithms available
 * for PKCS12 */
void wolfSSL_PKCS12_PBE_add(void)
{
    WOLFSSL_ENTER("wolfSSL_PKCS12_PBE_add");
}

#if !defined(NO_FILESYSTEM)
WOLFSSL_X509_PKCS12 *wolfSSL_d2i_PKCS12_fp(XFILE fp,
        WOLFSSL_X509_PKCS12 **pkcs12)
{
    WOLFSSL_ENTER("wolfSSL_d2i_PKCS12_fp");
    return (WOLFSSL_X509_PKCS12 *)wolfSSL_d2i_X509_fp_ex(fp, (void **)pkcs12,
        PKCS12_TYPE);
}
#endif /* !NO_FILESYSTEM */

#endif /* OPENSSL_EXTRA */

#if defined(HAVE_PKCS12)

#ifdef OPENSSL_EXTRA

#if !defined(NO_ASN) && !defined(NO_PWDBASED)

#ifndef NO_BIO
WC_PKCS12* wolfSSL_d2i_PKCS12_bio(WOLFSSL_BIO* bio, WC_PKCS12** pkcs12)
{
    WC_PKCS12* localPkcs12 = NULL;
    unsigned char* mem = NULL;
    int ret;
    word32 size;

    WOLFSSL_ENTER("wolfSSL_d2i_PKCS12_bio");

    if (bio == NULL) {
        WOLFSSL_MSG("Bad Function Argument bio is NULL");
        return NULL;
    }

    localPkcs12 = wc_PKCS12_new();
    if (localPkcs12 == NULL) {
        WOLFSSL_MSG("Memory error");
        return NULL;
    }

    if (pkcs12 != NULL) {
        *pkcs12 = localPkcs12;
    }

    ret = wolfSSL_BIO_get_mem_data(bio, &mem);
    if (mem == NULL || ret <= 0) {
        WOLFSSL_MSG("Failed to get data from bio struct");
        wc_PKCS12_free(localPkcs12);
        if (pkcs12 != NULL) {
            *pkcs12 = NULL;
        }
        return NULL;
    }
    size = ret;

    ret = wc_d2i_PKCS12(mem, size, localPkcs12);
    if (ret < 0) {
        WOLFSSL_MSG("Failed to get PKCS12 sequence");
        wc_PKCS12_free(localPkcs12);
        if (pkcs12 != NULL) {
            *pkcs12 = NULL;
        }
        return NULL;
    }

    return localPkcs12;
}

/* Converts the PKCS12 to DER format and outputs it into bio.
 *
 * bio is the structure to hold output DER
 * pkcs12 structure to create DER from
 *
 * return 1 for success or 0 if an error occurs
 */
int wolfSSL_i2d_PKCS12_bio(WOLFSSL_BIO *bio, WC_PKCS12 *pkcs12)
{
    int ret = WOLFSSL_FAILURE;

    WOLFSSL_ENTER("wolfSSL_i2d_PKCS12_bio");

    if ((bio != NULL) && (pkcs12 != NULL)) {
        word32 certSz = 0;
        byte *certDer = NULL;

        certSz = wc_i2d_PKCS12(pkcs12, &certDer, NULL);
        if ((certSz > 0) && (certDer != NULL)) {
            if (wolfSSL_BIO_write(bio, certDer, certSz) == (int)certSz) {
                ret = WOLFSSL_SUCCESS;
            }
        }

        if (certDer != NULL) {
            XFREE(certDer, NULL, DYNAMIC_TYPE_PKCS);
        }
    }

    return ret;
}
#endif /* !NO_BIO */

/* Creates a new WC_PKCS12 structure
 *
 * pass  password to use
 * name  friendlyName to use
 * pkey  private key to go into PKCS12 bundle
 * cert  certificate to go into PKCS12 bundle
 * ca    extra certificates that can be added to bundle. Can be NULL
 * keyNID  type of encryption to use on the key (-1 means no encryption)
 * certNID type of encryption to use on the certificate
 * itt     number of iterations with encryption
 * macItt  number of iterations with mac creation
 * keyType flag for signature and/or encryption key
 *
 * returns a pointer to a new WC_PKCS12 structure on success and NULL on fail
 */
WC_PKCS12* wolfSSL_PKCS12_create(char* pass, char* name, WOLFSSL_EVP_PKEY* pkey,
        WOLFSSL_X509* cert, WOLF_STACK_OF(WOLFSSL_X509)* ca, int keyNID,
        int certNID, int itt, int macItt, int keyType)
{
    WC_PKCS12* pkcs12;
    WC_DerCertList* list = NULL;
    word32 passSz;
    byte* keyDer = NULL;
    word32 keyDerSz;
    byte* certDer;
    int certDerSz;

    WOLFSSL_ENTER("wolfSSL_PKCS12_create()");

    if (pass == NULL || pkey == NULL || cert == NULL) {
        WOLFSSL_LEAVE("wolfSSL_PKCS12_create()", BAD_FUNC_ARG);
        return NULL;
    }
    passSz = (word32)XSTRLEN(pass);

    keyDer = (byte*)pkey->pkey.ptr;
    keyDerSz = pkey->pkey_sz;

    certDer = (byte*)wolfSSL_X509_get_der(cert, &certDerSz);
    if (certDer == NULL) {
        return NULL;
    }

    if (ca != NULL) {
        WC_DerCertList* cur;
        unsigned long numCerts = ca->num;
        byte* curDer;
        int   curDerSz = 0;
        WOLFSSL_STACK* sk = ca;

        while (numCerts > 0 && sk != NULL) {
            cur = (WC_DerCertList*)XMALLOC(sizeof(WC_DerCertList), NULL,
                    DYNAMIC_TYPE_PKCS);
            if (cur == NULL) {
                wc_FreeCertList(list, NULL);
                return NULL;
            }

            curDer = (byte*)wolfSSL_X509_get_der(sk->data.x509, &curDerSz);
            if (curDer == NULL || curDerSz < 0) {
                XFREE(cur, NULL, DYNAMIC_TYPE_PKCS);
                wc_FreeCertList(list, NULL);
                return NULL;
            }

            cur->buffer = (byte*)XMALLOC(curDerSz, NULL, DYNAMIC_TYPE_PKCS);
            if (cur->buffer == NULL) {
                XFREE(cur, NULL, DYNAMIC_TYPE_PKCS);
                wc_FreeCertList(list, NULL);
                return NULL;
            }
            XMEMCPY(cur->buffer, curDer, curDerSz);
            cur->bufferSz = curDerSz;
            cur->next = list;
            list = cur;

            sk = sk->next;
            numCerts--;
        }
    }

    pkcs12 = wc_PKCS12_create(pass, passSz, name, keyDer, keyDerSz,
            certDer, certDerSz, list, keyNID, certNID, itt, macItt,
            keyType, NULL);

    if (ca != NULL) {
        wc_FreeCertList(list, NULL);
    }

    return pkcs12;
}


/* return WOLFSSL_SUCCESS on success, WOLFSSL_FAILURE on failure */
int wolfSSL_PKCS12_parse(WC_PKCS12* pkcs12, const char* psw,
          WOLFSSL_EVP_PKEY** pkey, WOLFSSL_X509** cert,
          WOLF_STACK_OF(WOLFSSL_X509)** ca)
{
    DecodedCert DeCert;
    void* heap = NULL;
    int ret;
    byte* certData = NULL;
    word32 certDataSz;
    byte* pk = NULL;
    word32 pkSz;
    WC_DerCertList* certList = NULL;

    WOLFSSL_ENTER("wolfSSL_PKCS12_parse");

    /* make sure we init return args */
    if (pkey) *pkey = NULL;
    if (cert) *cert = NULL;
    if (ca)   *ca = NULL;

    if (pkcs12 == NULL || psw == NULL || pkey == NULL || cert == NULL) {
        WOLFSSL_MSG("Bad argument value");
        return WOLFSSL_FAILURE;
    }

    heap  = wc_PKCS12_GetHeap(pkcs12);

    if (ca == NULL) {
        ret = wc_PKCS12_parse(pkcs12, psw, &pk, &pkSz, &certData, &certDataSz,
            NULL);
    }
    else {
        ret = wc_PKCS12_parse(pkcs12, psw, &pk, &pkSz, &certData, &certDataSz,
            &certList);
    }
    if (ret < 0) {
        WOLFSSL_LEAVE("wolfSSL_PKCS12_parse", ret);
        return WOLFSSL_FAILURE;
    }

    /* Decode cert and place in X509 stack struct */
    if (certList != NULL) {
        WC_DerCertList* current = certList;

        *ca = (WOLF_STACK_OF(WOLFSSL_X509)*)XMALLOC(
            sizeof(WOLF_STACK_OF(WOLFSSL_X509)), heap, DYNAMIC_TYPE_X509);
        if (*ca == NULL) {
            if (pk != NULL) {
                XFREE(pk, heap, DYNAMIC_TYPE_PUBLIC_KEY);
            }
            if (certData != NULL) {
                XFREE(*cert, heap, DYNAMIC_TYPE_PKCS); *cert = NULL;
            }
            /* Free up WC_DerCertList and move on */
            while (current != NULL) {
                WC_DerCertList* next = current->next;

                XFREE(current->buffer, heap, DYNAMIC_TYPE_PKCS);
                XFREE(current, heap, DYNAMIC_TYPE_PKCS);
                current = next;
            }
            return WOLFSSL_FAILURE;
        }
        XMEMSET(*ca, 0, sizeof(WOLF_STACK_OF(WOLFSSL_X509)));

        /* add list of DER certs as X509's to stack */
        while (current != NULL) {
            WC_DerCertList*  toFree = current;
            WOLFSSL_X509* x509;

            x509 = (WOLFSSL_X509*)XMALLOC(sizeof(WOLFSSL_X509), heap,
                DYNAMIC_TYPE_X509);
            InitX509(x509, 1, heap);
            InitDecodedCert(&DeCert, current->buffer, current->bufferSz, heap);
            if (ParseCertRelative(&DeCert, CERT_TYPE, NO_VERIFY, NULL) != 0) {
                WOLFSSL_MSG("Issue with parsing certificate");
                FreeDecodedCert(&DeCert);
                wolfSSL_X509_free(x509);
            }
            else {
                if (CopyDecodedToX509(x509, &DeCert) != 0) {
                    WOLFSSL_MSG("Failed to copy decoded cert");
                    FreeDecodedCert(&DeCert);
                    wolfSSL_X509_free(x509);
                    wolfSSL_sk_X509_free(*ca); *ca = NULL;
                    if (pk != NULL) {
                        XFREE(pk, heap, DYNAMIC_TYPE_PUBLIC_KEY);
                    }
                    if (certData != NULL) {
                        XFREE(certData, heap, DYNAMIC_TYPE_PKCS);
                    }
                    /* Free up WC_DerCertList */
                    while (current != NULL) {
                        WC_DerCertList* next = current->next;

                        XFREE(current->buffer, heap, DYNAMIC_TYPE_PKCS);
                        XFREE(current, heap, DYNAMIC_TYPE_PKCS);
                        current = next;
                    }
                    return WOLFSSL_FAILURE;
                }
                FreeDecodedCert(&DeCert);

                if (wolfSSL_sk_X509_push(*ca, x509) != 1) {
                    WOLFSSL_MSG("Failed to push x509 onto stack");
                    wolfSSL_X509_free(x509);
                    wolfSSL_sk_X509_free(*ca); *ca = NULL;
                    if (pk != NULL) {
                        XFREE(pk, heap, DYNAMIC_TYPE_PUBLIC_KEY);
                    }
                    if (certData != NULL) {
                        XFREE(certData, heap, DYNAMIC_TYPE_PKCS);
                    }

                    /* Free up WC_DerCertList */
                    while (current != NULL) {
                        WC_DerCertList* next = current->next;

                        XFREE(current->buffer, heap, DYNAMIC_TYPE_PKCS);
                        XFREE(current, heap, DYNAMIC_TYPE_PKCS);
                        current = next;
                    }
                    return WOLFSSL_FAILURE;
                }
            }
            current = current->next;
            XFREE(toFree->buffer, heap, DYNAMIC_TYPE_PKCS);
            XFREE(toFree, heap, DYNAMIC_TYPE_PKCS);
        }
    }


    /* Decode cert and place in X509 struct */
    if (certData != NULL) {
        *cert = (WOLFSSL_X509*)XMALLOC(sizeof(WOLFSSL_X509), heap,
            DYNAMIC_TYPE_X509);
        if (*cert == NULL) {
            if (pk != NULL) {
                XFREE(pk, heap, DYNAMIC_TYPE_PUBLIC_KEY);
            }
            if (ca != NULL) {
                wolfSSL_sk_X509_free(*ca); *ca = NULL;
            }
            XFREE(certData, heap, DYNAMIC_TYPE_PKCS);
            return WOLFSSL_FAILURE;
        }
        InitX509(*cert, 1, heap);
        InitDecodedCert(&DeCert, certData, certDataSz, heap);
        if (ParseCertRelative(&DeCert, CERT_TYPE, NO_VERIFY, NULL) != 0) {
            WOLFSSL_MSG("Issue with parsing certificate");
        }
        if (CopyDecodedToX509(*cert, &DeCert) != 0) {
            WOLFSSL_MSG("Failed to copy decoded cert");
            FreeDecodedCert(&DeCert);
            if (pk != NULL) {
                XFREE(pk, heap, DYNAMIC_TYPE_PUBLIC_KEY);
            }
            if (ca != NULL) {
                wolfSSL_sk_X509_free(*ca); *ca = NULL;
            }
            wolfSSL_X509_free(*cert); *cert = NULL;
            return WOLFSSL_FAILURE;
        }
        FreeDecodedCert(&DeCert);
        XFREE(certData, heap, DYNAMIC_TYPE_PKCS);
    }


    /* get key type */
    ret = BAD_STATE_E;
    if (pk != NULL) { /* decode key if present */
        *pkey = wolfSSL_EVP_PKEY_new_ex(heap);
        if (*pkey == NULL) {
            wolfSSL_X509_free(*cert); *cert = NULL;
            if (ca != NULL) {
                wolfSSL_sk_X509_free(*ca); *ca = NULL;
            }
            XFREE(pk, heap, DYNAMIC_TYPE_PUBLIC_KEY);
            return WOLFSSL_FAILURE;
        }
    #ifndef NO_RSA
        {
            word32 keyIdx = 0;
            RsaKey key;

            if (wc_InitRsaKey(&key, heap) != 0) {
                ret = BAD_STATE_E;
            }
            else {
                if ((ret = wc_RsaPrivateKeyDecode(pk, &keyIdx, &key, pkSz))
                                                                         == 0) {
                    (*pkey)->type = EVP_PKEY_RSA;
                    (*pkey)->rsa  = wolfSSL_RSA_new();
                    (*pkey)->ownRsa = 1; /* we own RSA */
                    if ((*pkey)->rsa == NULL) {
                        WOLFSSL_MSG("issue creating EVP RSA key");
                        wolfSSL_X509_free(*cert); *cert = NULL;
                        if (ca != NULL) {
                            wolfSSL_sk_X509_free(*ca); *ca = NULL;
                        }
                        wolfSSL_EVP_PKEY_free(*pkey); *pkey = NULL;
                        XFREE(pk, heap, DYNAMIC_TYPE_PKCS);
                        return WOLFSSL_FAILURE;
                    }
                    if (wolfSSL_RSA_LoadDer_ex((*pkey)->rsa, pk, pkSz,
                                     WOLFSSL_RSA_LOAD_PRIVATE) != SSL_SUCCESS) {
                        WOLFSSL_MSG("issue loading RSA key");
                        wolfSSL_X509_free(*cert); *cert = NULL;
                        if (ca != NULL) {
                            wolfSSL_sk_X509_free(*ca); *ca = NULL;
                        }
                        wolfSSL_EVP_PKEY_free(*pkey); *pkey = NULL;
                        XFREE(pk, heap, DYNAMIC_TYPE_PKCS);
                        return WOLFSSL_FAILURE;
                    }

                    WOLFSSL_MSG("Found PKCS12 RSA key");
                    ret = 0; /* set in success state for upcoming ECC check */
                }
                wc_FreeRsaKey(&key);
            }
        }
    #endif /* NO_RSA */

    #ifdef HAVE_ECC
        {
            word32  keyIdx = 0;
            ecc_key key;

            if (ret != 0) { /* if is in fail state check if ECC key */
                if (wc_ecc_init(&key) != 0) {
                    wolfSSL_X509_free(*cert); *cert = NULL;
                    if (ca != NULL) {
                        wolfSSL_sk_X509_free(*ca); *ca = NULL;
                    }
                    wolfSSL_EVP_PKEY_free(*pkey); *pkey = NULL;
                    XFREE(pk, heap, DYNAMIC_TYPE_PKCS);
                    return WOLFSSL_FAILURE;
                }

                if ((ret = wc_EccPrivateKeyDecode(pk, &keyIdx, &key, pkSz))
                                                                         != 0) {
                    wolfSSL_X509_free(*cert); *cert = NULL;
                    if (ca != NULL) {
                        wolfSSL_sk_X509_free(*ca); *ca = NULL;
                    }
                    wolfSSL_EVP_PKEY_free(*pkey); *pkey = NULL;
                    XFREE(pk, heap, DYNAMIC_TYPE_PKCS);
                    WOLFSSL_MSG("Bad PKCS12 key format");
                    return WOLFSSL_FAILURE;
                }
                (*pkey)->type = EVP_PKEY_EC;
                (*pkey)->pkey_curve = key.dp->oidSum;
                wc_ecc_free(&key);
                WOLFSSL_MSG("Found PKCS12 ECC key");
            }
        }
    #else
        if (ret != 0) { /* if is in fail state and no ECC then fail */
            wolfSSL_X509_free(*cert); *cert = NULL;
            if (ca != NULL) {
                wolfSSL_sk_X509_free(*ca); *ca = NULL;
            }
            wolfSSL_EVP_PKEY_free(*pkey); *pkey = NULL;
            XFREE(pk, heap, DYNAMIC_TYPE_PKCS);
            WOLFSSL_MSG("Bad PKCS12 key format");
            return WOLFSSL_FAILURE;
        }
    #endif /* HAVE_ECC */

        (*pkey)->save_type = 0;
        (*pkey)->pkey_sz   = pkSz;
        (*pkey)->pkey.ptr  = (char*)pk;
    }

    (void)ret;
    (void)ca;

    return WOLFSSL_SUCCESS;
}

int wolfSSL_PKCS12_verify_mac(WC_PKCS12 *pkcs12, const char *psw,
        int pswLen)
{
    WOLFSSL_ENTER("wolfSSL_PKCS12_verify_mac");

    if (!pkcs12) {
        return WOLFSSL_FAILURE;
    }

    return wc_PKCS12_verify_ex(pkcs12, (const byte*)psw, pswLen) == 0 ?
            WOLFSSL_SUCCESS : WOLFSSL_FAILURE;
}

#endif /* !NO_ASN && !NO_PWDBASED */

#endif /* OPENSSL_EXTRA */

#endif /* HAVE_PKCS12 */
/*******************************************************************************
 * END OF PKCS12 APIs
 ******************************************************************************/

#endif /* !NO_CERTS */

#endif /* !WOLFCRYPT_ONLY */

/*******************************************************************************
 * START OF CRYPTO-ONLY APIs
 ******************************************************************************/

#if defined(OPENSSL_EXTRA) || defined(HAVE_LIGHTY) || \
    defined(WOLFSSL_MYSQL_COMPATIBLE) || defined(HAVE_STUNNEL) || \
    defined(WOLFSSL_NGINX) || defined(HAVE_POCO_LIB) || \
    defined(WOLFSSL_HAPROXY)

#ifndef NO_SHA
    /* One shot SHA1 hash of message.
     *
     * d  message to hash
     * n  size of d buffer
     * md buffer to hold digest. Should be SHA_DIGEST_SIZE.
     *
     * Note: if md is null then a static buffer of SHA_DIGEST_SIZE is used.
     *       When the static buffer is used this function is not thread safe.
     *
     * Returns a pointer to the message digest on success and NULL on failure.
     */
    unsigned char *wolfSSL_SHA1(const unsigned char *d, size_t n,
            unsigned char *md)
    {
        static byte dig[WC_SHA_DIGEST_SIZE];
        byte* ret = md;
        wc_Sha sha;

        WOLFSSL_ENTER("wolfSSL_SHA1");

        if (wc_InitSha_ex(&sha, NULL, 0) != 0) {
            WOLFSSL_MSG("SHA1 Init failed");
            return NULL;
        }

        if (wc_ShaUpdate(&sha, (const byte*)d, (word32)n) != 0) {
            WOLFSSL_MSG("SHA1 Update failed");
            return NULL;
        }

        if (md == NULL) {
            WOLFSSL_MSG("STATIC BUFFER BEING USED. wolfSSL_SHA1 IS NOT "
                        "THREAD SAFE WHEN md == NULL");
            ret = dig;
        }
        if (wc_ShaFinal(&sha, ret) != 0) {
            WOLFSSL_MSG("SHA1 Final failed");
            wc_ShaFree(&sha);
            return NULL;
        }
        wc_ShaFree(&sha);

        return ret;
    }
#endif /* ! NO_SHA */

#ifdef WOLFSSL_SHA224
    /* One shot SHA224 hash of message.
     *
     * d  message to hash
     * n  size of d buffer
     * md buffer to hold digest. Should be WC_SHA224_DIGEST_SIZE.
     *
     * Note: if md is null then a static buffer of WC_SHA256_DIGEST_SIZE is used.
     *       When the static buffer is used this function is not thread safe.
     *
     * Returns a pointer to the message digest on success and NULL on failure.
     */
      unsigned char *wolfSSL_SHA224(const unsigned char *d, size_t n,
            unsigned char *md)
     {
        static byte dig[WC_SHA224_DIGEST_SIZE];
        byte* ret = md;
        wc_Sha256 sha;

        WOLFSSL_ENTER("wolfSSL_SHA224");

        if (wc_InitSha224_ex(&sha, NULL, 0) != 0) {
            WOLFSSL_MSG("SHA224 Init failed");
            return NULL;
        }

        if (wc_Sha224Update(&sha, (const byte*)d, (word32)n) != 0) {
            WOLFSSL_MSG("SHA224 Update failed");
            return NULL;
        }

        if (md == NULL) {
            WOLFSSL_MSG("STATIC BUFFER BEING USED. wolfSSL_SHA224 IS NOT "
                        "THREAD SAFE WHEN md == NULL");
            ret = dig;
        }
        if (wc_Sha224Final(&sha, ret) != 0) {
            WOLFSSL_MSG("SHA224 Final failed");
            wc_Sha224Free(&sha);
            return NULL;
        }
        wc_Sha224Free(&sha);

        return ret;
    }
#endif

#ifndef NO_SHA256
    /* One shot SHA256 hash of message.
     *
     * d  message to hash
     * n  size of d buffer
     * md buffer to hold digest. Should be WC_SHA256_DIGEST_SIZE.
     *
     * Note: if md is null then a static buffer of WC_SHA256_DIGEST_SIZE is used.
     *       When the static buffer is used this function is not thread safe.
     *
     * Returns a pointer to the message digest on success and NULL on failure.
     */
    unsigned char *wolfSSL_SHA256(const unsigned char *d, size_t n,
            unsigned char *md)
    {
        static byte dig[WC_SHA256_DIGEST_SIZE];
        byte* ret = md;
        wc_Sha256 sha;

        WOLFSSL_ENTER("wolfSSL_SHA256");

        if (wc_InitSha256_ex(&sha, NULL, 0) != 0) {
            WOLFSSL_MSG("SHA256 Init failed");
            return NULL;
        }

        if (wc_Sha256Update(&sha, (const byte*)d, (word32)n) != 0) {
            WOLFSSL_MSG("SHA256 Update failed");
            return NULL;
        }

        if (md == NULL) {
            WOLFSSL_MSG("STATIC BUFFER BEING USED. wolfSSL_SHA256 IS NOT "
                        "THREAD SAFE WHEN md == NULL");
            ret = dig;
        }
        if (wc_Sha256Final(&sha, ret) != 0) {
            WOLFSSL_MSG("SHA256 Final failed");
            wc_Sha256Free(&sha);
            return NULL;
        }
        wc_Sha256Free(&sha);

        return ret;
    }
#endif /* ! NO_SHA256 */

#ifdef WOLFSSL_SHA384
     /* One shot SHA384 hash of message.
      *
      * d  message to hash
      * n  size of d buffer
      * md buffer to hold digest. Should be WC_SHA256_DIGEST_SIZE.
      *
      * Note: if md is null then a static buffer of WC_SHA256_DIGEST_SIZE is used.
      *       When the static buffer is used this function is not thread safe.
      *
      * Returns a pointer to the message digest on success and NULL on failure.
      */
     unsigned char *wolfSSL_SHA384(const unsigned char *d, size_t n,
             unsigned char *md)
     {
         static byte dig[WC_SHA384_DIGEST_SIZE];
         byte* ret = md;
         wc_Sha384 sha;

         WOLFSSL_ENTER("wolfSSL_SHA384");

         if (wc_InitSha384_ex(&sha, NULL, 0) != 0) {
             WOLFSSL_MSG("SHA384 Init failed");
             return NULL;
         }

         if (wc_Sha384Update(&sha, (const byte*)d, (word32)n) != 0) {
             WOLFSSL_MSG("SHA384 Update failed");
             return NULL;
         }

         if (md == NULL) {
             WOLFSSL_MSG("STATIC BUFFER BEING USED. wolfSSL_SHA384 IS NOT "
                         "THREAD SAFE WHEN md == NULL");
             ret = dig;
         }
         if (wc_Sha384Final(&sha, ret) != 0) {
             WOLFSSL_MSG("SHA384 Final failed");
             wc_Sha384Free(&sha);
             return NULL;
         }
         wc_Sha384Free(&sha);

         return ret;
     }
#endif /* WOLFSSL_SHA384  */

#if defined(WOLFSSL_SHA512)
     /* One shot SHA512 hash of message.
      *
      * d  message to hash
      * n  size of d buffer
      * md buffer to hold digest. Should be WC_SHA256_DIGEST_SIZE.
      *
      * Note: if md is null then a static buffer of WC_SHA256_DIGEST_SIZE is used.
      *       When the static buffer is used this function is not thread safe.
      *
      * Returns a pointer to the message digest on success and NULL on failure.
      */
     unsigned char *wolfSSL_SHA512(const unsigned char *d, size_t n,
             unsigned char *md)
     {
         static byte dig[WC_SHA512_DIGEST_SIZE];
         byte* ret = md;
         wc_Sha512 sha;

         WOLFSSL_ENTER("wolfSSL_SHA512");

         if (wc_InitSha512_ex(&sha, NULL, 0) != 0) {
             WOLFSSL_MSG("SHA512 Init failed");
             return NULL;
         }

         if (wc_Sha512Update(&sha, (const byte*)d, (word32)n) != 0) {
             WOLFSSL_MSG("SHA512 Update failed");
             return NULL;
         }

         if (md == NULL) {
             WOLFSSL_MSG("STATIC BUFFER BEING USED. wolfSSL_SHA512 IS NOT "
                         "THREAD SAFE WHEN md == NULL");
             ret = dig;
         }
         if (wc_Sha512Final(&sha, ret) != 0) {
             WOLFSSL_MSG("SHA512 Final failed");
             wc_Sha512Free(&sha);
             return NULL;
         }
         wc_Sha512Free(&sha);

         return ret;
     }
#endif /* WOLFSSL_SHA512 */
#endif /* OPENSSL_EXTRA || HAVE_LIGHTY || WOLFSSL_MYSQL_COMPATIBLE ||
        * HAVE_STUNNEL || WOLFSSL_NGINX || HAVE_POCO_LIB || WOLFSSL_HAPROXY */

/*******************************************************************************
 * END OF CRYPTO-ONLY APIs
 ******************************************************************************/
