#***************************************************************************
#                                  _   _ ____  _
#  Project                     ___| | | |  _ \| |
#                             / __| | | | |_) | |
#                            | (__| |_| |  _ <| |___
#                             \___|\___/|_| \_\_____|
#
# Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
#***************************************************************************

# File version for 'aclocal' use. Keep it a single number.
# serial 5


dnl CURL_CHECK_OPENSSL_API_HEADERS
dnl -------------------------------------------------
dnl Find out OpenSSL headers API version, as reported
dnl by OPENSSL_VERSION_NUMBER. No runtime checks
dnl allowed here for cross-compilation support.
dnl HAVE_OPENSSL_API_HEADERS is defined as appropriate
dnl only for systems which actually run the configure
dnl script. Config files generated manually or in any
dnl other way shall not define this.

AC_DEFUN([CURL_CHECK_OPENSSL_API_HEADERS], [
  #
  tst_api="unknown"
  #
  AC_MSG_CHECKING([for OpenSSL headers version])
  CURL_CHECK_DEF([OPENSSL_VERSION_NUMBER], [
#   ifdef USE_OPENSSL
#     include <openssl/crypto.h>
#   else
#     include <crypto.h>
#   endif
    ], [silent])
  if test "$curl_cv_have_def_OPENSSL_VERSION_NUMBER" = "yes"; then
    tst_verlen=`expr "$curl_cv_def_OPENSSL_VERSION_NUMBER" : '.*'`
    case "x$tst_verlen" in
      x6)
        tst_vermaj=`echo $curl_cv_def_OPENSSL_VERSION_NUMBER | cut -c 3`
        tst_vermin=`echo $curl_cv_def_OPENSSL_VERSION_NUMBER | cut -c 4`
        tst_verfix=`echo $curl_cv_def_OPENSSL_VERSION_NUMBER | cut -c 5`
        tst_api=0x$tst_vermaj$tst_vermin$tst_verfix
        ;;
      x11|x10)
        tst_vermaj=`echo $curl_cv_def_OPENSSL_VERSION_NUMBER | cut -c 3`
        tst_vermin=`echo $curl_cv_def_OPENSSL_VERSION_NUMBER | cut -c 5`
        tst_verfix=`echo $curl_cv_def_OPENSSL_VERSION_NUMBER | cut -c 7`
        tst_api=0x$tst_vermaj$tst_vermin$tst_verfix
        ;;
      *)
        tst_api="unknown"
        ;;
    esac
    case $tst_api in
      0x111) tst_show="1.1.1" ;;
      0x110) tst_show="1.1.0" ;;
      0x102) tst_show="1.0.2" ;;
      0x101) tst_show="1.0.1" ;;
      0x100) tst_show="1.0.0" ;;
      0x099) tst_show="0.9.9" ;;
      0x098) tst_show="0.9.8" ;;
      0x097) tst_show="0.9.7" ;;
      0x096) tst_show="0.9.6" ;;
      0x095) tst_show="0.9.5" ;;
      0x094) tst_show="0.9.4" ;;
      0x093) tst_show="0.9.3" ;;
      0x092) tst_show="0.9.2" ;;
      0x091) tst_show="0.9.1" ;;
      *)     tst_show="unknown" ;;
    esac
    tst_show="$tst_show - $curl_cv_def_OPENSSL_VERSION_NUMBER"
  else
    tst_show="unknown"
  fi
  AC_MSG_RESULT([$tst_show])
  #
dnl if test "$tst_api" != "unknown"; then
dnl AC_DEFINE_UNQUOTED(HAVE_OPENSSL_API_HEADERS, $tst_api,
dnl   [OpenSSL headers configure time API. Defined only by configure script.
dnl    No matter what, do not ever define this manually or by any other means.])
dnl fi
  curl_openssl_api_headers=$tst_api
])


dnl CURL_CHECK_OPENSSL_API_LIBRARY
dnl -------------------------------------------------
dnl Find out OpenSSL library API version, performing
dnl only link tests in order to avoid getting fooled
dnl by mismatched OpenSSL headers. No runtime checks
dnl allowed here for cross-compilation support.
dnl HAVE_OPENSSL_API_LIBRARY is defined as appropriate
dnl only for systems which actually run the configure
dnl script. Config files generated manually or in any
dnl other way shall not define this.
dnl
dnl Most probably we should not bother attempting to
dnl detect OpenSSL library development API versions
dnl 0.9.9 and 1.1.0. For our intended use, detecting
dnl released versions should be good enough.
dnl
dnl Given that currently we are not using the result
dnl of this check, except for informative purposes,
dnl lets try to figure out everything.

AC_DEFUN([CURL_CHECK_OPENSSL_API_LIBRARY], [
  #
  tst_api="unknown"
  #
  AC_MSG_CHECKING([for OpenSSL library version])
  if test "$tst_api" = "unknown"; then
    AC_LINK_IFELSE([
      AC_LANG_FUNC_LINK_TRY([ERR_clear_last_mark])
    ],[
      tst_api="0x111"
    ])
  fi
  if test "$tst_api" = "unknown"; then
    case $host in
      *-*-vms*)
        AC_LINK_IFELSE([
          AC_LANG_FUNC_LINK_TRY([SSL_CTX_set_not_resumbl_sess_cb])
        ],[
          tst_api="0x110"
        ])
        ;;
      *)
        AC_LINK_IFELSE([
          AC_LANG_FUNC_LINK_TRY([SSL_CTX_set_not_resumable_session_callback])
        ],[
          tst_api="0x110"
        ])
        ;;
    esac
  fi
  if test "$tst_api" = "unknown"; then
    AC_LINK_IFELSE([
      AC_LANG_FUNC_LINK_TRY([SSL_CONF_CTX_new])
    ],[
      tst_api="0x102"
    ])
  fi
  if test "$tst_api" = "unknown"; then
    AC_LINK_IFELSE([
      AC_LANG_FUNC_LINK_TRY([SSL_renegotiate_abbreviated])
    ],[
      tst_api="0x101"
    ])
  fi
  if test "$tst_api" = "unknown"; then
    AC_LINK_IFELSE([
      AC_LANG_FUNC_LINK_TRY([OBJ_add_sigid])
    ],[
      tst_api="0x100"
    ])
  fi
  if test "$tst_api" = "unknown"; then
    AC_LINK_IFELSE([
      AC_LANG_FUNC_LINK_TRY([ERR_set_mark])
    ],[
      tst_api="0x098"
    ])
  fi
  if test "$tst_api" = "unknown"; then
    AC_LINK_IFELSE([
      AC_LANG_FUNC_LINK_TRY([ERR_peek_last_error])
    ],[
      tst_api="0x097"
    ])
  fi
  if test "$tst_api" = "unknown"; then
    AC_LINK_IFELSE([
      AC_LANG_FUNC_LINK_TRY([c2i_ASN1_OBJECT])
    ],[
      tst_api="0x096"
    ])
  fi
  if test "$tst_api" = "unknown"; then
    AC_LINK_IFELSE([
      AC_LANG_FUNC_LINK_TRY([SSL_CTX_set_purpose])
    ],[
      tst_api="0x095"
    ])
  fi
  if test "$tst_api" = "unknown"; then
    AC_LINK_IFELSE([
      AC_LANG_FUNC_LINK_TRY([OBJ_obj2txt])
    ],[
      tst_api="0x094"
    ])
  fi
  if test "$tst_api" = "unknown"; then
    AC_LINK_IFELSE([
      AC_LANG_FUNC_LINK_TRY([SSL_get_verify_depth])
    ],[
      tst_api="0x093"
    ])
  fi
  if test "$tst_api" = "unknown"; then
    AC_LINK_IFELSE([
      AC_LANG_FUNC_LINK_TRY([SSL_library_init])
    ],[
      tst_api="0x092"
    ])
  fi
  if test "$tst_api" = "unknown"; then
    AC_LINK_IFELSE([
      AC_LANG_FUNC_LINK_TRY([SSL_CTX_set_cipher_list])
    ],[
      tst_api="0x091"
    ])
  fi
  case $tst_api in
    0x111) tst_show="1.1.1" ;;
    0x110) tst_show="1.1.0" ;;
    0x102) tst_show="1.0.2" ;;
    0x101) tst_show="1.0.1" ;;
    0x100) tst_show="1.0.0" ;;
    0x099) tst_show="0.9.9" ;;
    0x098) tst_show="0.9.8" ;;
    0x097) tst_show="0.9.7" ;;
    0x096) tst_show="0.9.6" ;;
    0x095) tst_show="0.9.5" ;;
    0x094) tst_show="0.9.4" ;;
    0x093) tst_show="0.9.3" ;;
    0x092) tst_show="0.9.2" ;;
    0x091) tst_show="0.9.1" ;;
    *)     tst_show="unknown" ;;
  esac
  AC_MSG_RESULT([$tst_show])
  #
dnl if test "$tst_api" != "unknown"; then
dnl AC_DEFINE_UNQUOTED(HAVE_OPENSSL_API_LIBRARY, $tst_api,
dnl   [OpenSSL library link time API. Defined only by configure script.
dnl    No matter what, do not ever define this manually or by any other means.])
dnl fi
  curl_openssl_api_library=$tst_api
])


dnl CURL_CHECK_OPENSSL_API
dnl -------------------------------------------------

AC_DEFUN([CURL_CHECK_OPENSSL_API], [
  #
  CURL_CHECK_OPENSSL_API_HEADERS
  CURL_CHECK_OPENSSL_API_LIBRARY
  #
  tst_match="yes"
  #
  AC_MSG_CHECKING([for OpenSSL headers and library versions matching])
  if test "$curl_openssl_api_headers" = "unknown" ||
    test "$curl_openssl_api_library" = "unknown"; then
    tst_match="fail"
    tst_warns="Can not compare OpenSSL headers and library versions."
  elif test "$curl_openssl_api_headers" != "$curl_openssl_api_library"; then
    tst_match="no"
    tst_warns="OpenSSL headers and library versions do not match."
  fi
  AC_MSG_RESULT([$tst_match])
  if test "$tst_match" != "yes"; then
    AC_MSG_WARN([$tst_warns])
  fi
])
