m4/ax_lib_openssl.m4

   1 # ===========================================================================
   2 #             ax_lib_openssl.html
   3 # ===========================================================================
   4 #
   5 # SYNOPSIS
   6 #
   7 #   AX_LIB_OPENSSL([MINIMUM-VERSION])
   8 #
   9 # DESCRIPTION
  10 #
  11 #   This macro provides tests of availability of OpenSSL of a
  12 #   particular version or newer. This macros checks for OpenSSL
  13 #   headers and libraries and defines compilation flags.
  14 #
  15 #   Macro supports following options and their values:
  16 #
  17 #   1) Single-option usage:
  18 #
  19 #     --with-openssl - yes, no or path to OpenSSL installation prefix
  20 #
  21 #   This macro calls:
  22 #
  23 #     AC_SUBST(OPENSSL_CFLAGS)
  24 #     AC_SUBST(OPENSSL_LDFLAGS)
  25 #     AC_SUBST(OPENSSL_VERSION) - only if version requirement is used
  26 #
  27 #   And sets:
  28 #
  29 #     HAVE_OPENSSL
  30 #
  31 # Copyright (c) 2008-2009 CineCert, LLC
  32 # All rights reserved.
  33 #
  34 # Redistribution and use in source and binary forms, with or without
  35 # modification, are permitted provided that the following conditions
  36 # are met:
  37 # 1. Redistributions of source code must retain the above copyright
  38 #    notice, this list of conditions and the following disclaimer.
  39 # 2. Redistributions in binary form must reproduce the above copyright
  40 #    notice, this list of conditions and the following disclaimer in the
  41 #    documentation and/or other materials provided with the distribution.
  42 # 3. The name of the author may not be used to endorse or promote products
  43 #    derived from this software without specific prior written permission.
  44 #
  45 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  46 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  47 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  48 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  49 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  50 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  51 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  52 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  53 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  54 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  55 #
  56
  57 AC_DEFUN([AX_LIB_OPENSSL],
  58 [
  59     AC_ARG_WITH([openssl],
  60         AC_HELP_STRING([--with-openssl=@<:@ARG@:>@],
  61             [use OpenSSL from given prefix (ARG=path); check standard prefixes (ARG=yes); disable (ARG=no)]
  62         ),
  63         [
  64         if test "$withval" = "yes"; then
  65             if test -d /var/local/ssl/include ; then
  66                 openssl_prefix=/var/local/ssl
  67             elif test -d /var/local/include/openssl ; then
  68                 openssl_prefix=/var/local
  69             elif test -d /usr/local/ssl/include ; then
  70                 openssl_prefix=/usr/local/ssl
  71             elif test -d /usr/lib/ssl/include ; then
  72                 openssl_prefix=/usr/lib/ssl
  73             elif test -d /usr/include/openssl ; then
  74                 openssl_prefix=/usr
  75             else
  76                 openssl_prefix=""
  77             fi
  78             openssl_requested="yes"
  79         elif test -d "$withval"; then
  80             openssl_prefix="$withval"
  81             openssl_requested="yes"
  82         else
  83             openssl_prefix=""
  84             openssl_requested="no"
  85         fi
  86         ],
  87         [
  88         dnl Default behavior is implicit yes
  89         if test -d /var/local/ssl/include ; then
  90             openssl_prefix=/var/local/ssl
  91         elif test -d /var/local/include/openssl ; then
  92             openssl_prefix=/var/local
  93         elif test -d /usr/local/ssl/include ; then
  94             openssl_prefix=/usr/local/ssl
  95         elif test -d /usr/lib/ssl/include ; then
  96             openssl_prefix=/usr/lib/ssl
  97         elif test -d /usr/include/openssl ; then
  98             openssl_prefix=/usr
  99         else
 100             openssl_prefix=""
 101         fi
 102         ]
 103     )
 104
 105     OPENSSL_CPPFLAGS=""
 106     OPENSSL_LDFLAGS=""
 107     OPENSSL_VERSION=""
 108
 109     dnl
 110     dnl Collect include/lib paths and flags
 111     dnl
 112     run_openssl_test="no"
 113
 114     if test -n "$openssl_prefix"; then
 115         openssl_include_dir="$openssl_prefix/include"
 116         openssl_ldflags="-L$openssl_prefix/lib64 -L$openssl_prefix/lib"
 117         run_openssl_test="yes"
 118     elif test "$openssl_requested" = "yes"; then
 119         if test -n "$openssl_include_dir" -a -n "$openssl_lib_flags"; then
 120             run_openssl_test="yes"
 121         fi
 122     else
 123         run_openssl_test="no"
 124     fi
 125
 126     openssl_libs="-lssl -lcrypto"
 127
 128     dnl
 129     dnl Check OpenSSL files
 130     dnl
 131     if test "$run_openssl_test" = "yes"; then
 132
 133         saved_CPPFLAGS="$CPPFLAGS"
 134         CPPFLAGS="$CPPFLAGS -I$openssl_include_dir"
 135
 136         saved_LDFLAGS="$LDFLAGS"
 137         LDFLAGS="$LDFLAGS $openssl_ldflags"
 138
 139         saved_LIBS="$LIBS"
 140         LIBS="$openssl_libs $LIBS"
 141
 142         dnl
 143         dnl Check OpenSSL headers
 144         dnl
 145         AC_MSG_CHECKING([for OpenSSL headers in $openssl_include_dir])
 146
 147         AC_LANG_PUSH([C])
 148         AC_COMPILE_IFELSE([
 149             AC_LANG_PROGRAM(
 150                 [[
 151 @%:@include <openssl/opensslv.h>
 152 @%:@include <openssl/ssl.h>
 153 @%:@include <openssl/crypto.h>
 154                 ]],
 155                 [[]]
 156             )],
 157             [
 158             OPENSSL_CPPFLAGS="-I$openssl_include_dir"
 159             openssl_header_found="yes"
 160             AC_MSG_RESULT([found])
 161             ],
 162             [
 163             openssl_header_found="no"
 164             AC_MSG_RESULT([not found])
 165             ]
 166         )
 167         AC_LANG_POP([C])
 168
 169         dnl
 170         dnl Check OpenSSL libraries
 171         dnl
 172         if test "$openssl_header_found" = "yes"; then
 173
 174             AC_MSG_CHECKING([for OpenSSL libraries])
 175
 176             AC_LANG_PUSH([C])
 177             AC_LINK_IFELSE([
 178                 AC_LANG_PROGRAM(
 179                     [[
 180 @%:@include <openssl/opensslv.h>
 181 @%:@include <openssl/ssl.h>
 182 @%:@include <openssl/crypto.h>
 183 #if (OPENSSL_VERSION_NUMBER < 0x0090700f)
 184 #endif
 185                     ]],
 186                     [[
 187 SSL_library_init();
 188 SSLeay();
 189                     ]]
 190                 )],
 191                 [
 192                 OPENSSL_LDFLAGS="$openssl_ldflags"
 193                 OPENSSL_LIBS="$openssl_libs"
 194                 openssl_lib_found="yes"
 195                 AC_MSG_RESULT([found])
 196                 ],
 197                 [
 198                 openssl_lib_found="no"
 199                 AC_MSG_RESULT([not found])
 200                 ]
 201             )
 202             AC_LANG_POP([C])
 203         fi
 204
 205         CPPFLAGS="$saved_CPPFLAGS"
 206         LDFLAGS="$saved_LDFLAGS"
 207         LIBS="$saved_LIBS"
 208     fi
 209
 210     AC_MSG_CHECKING([for OpenSSL])
 211
 212     if test "$run_openssl_test" = "yes"; then
 213         if test "$openssl_header_found" = "yes" -a "$openssl_lib_found" = "yes"; then
 214
 215             AC_SUBST([OPENSSL_CPPFLAGS])
 216             AC_SUBST([OPENSSL_LDFLAGS])
 217             AC_SUBST([OPENSSL_LIBS])
 218
 219             HAVE_OPENSSL="yes"
 220         else
 221             HAVE_OPENSSL="no"
 222         fi
 223
 224         AC_MSG_RESULT([$HAVE_OPENSSL])
 225
 226         dnl
 227         dnl Check OpenSSL version
 228         dnl
 229         if test "$HAVE_OPENSSL" = "yes"; then
 230
 231             openssl_version_req=ifelse([$1], [], [], [$1])
 232
 233             if test  -n "$openssl_version_req"; then
 234
 235                 AC_MSG_CHECKING([if OpenSSL version is >= $openssl_version_req])
 236
 237                 if test -f "$openssl_include_dir/openssl/opensslv.h"; then
 238
 239                     OPENSSL_VERSION=`grep OPENSSL_VERSION_TEXT $openssl_include_dir/openssl/opensslv.h \
 240                                     | grep -v fips | grep -v PTEXT | cut -f 2 | tr -d \"`
 241                     AC_SUBST([OPENSSL_VERSION])
 242
 243                     dnl Decompose required version string and calculate numerical representation
 244                     openssl_version_req_major=`expr $openssl_version_req : '\([[0-9]]*\)'`
 245                     openssl_version_req_minor=`expr $openssl_version_req : '[[0-9]]*\.\([[0-9]]*\)'`
 246                     openssl_version_req_revision=`expr $openssl_version_req : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
 247                     openssl_version_req_patch=`expr $openssl_version_req : '[[0-9]]*\.[[0-9]]*\.[[0-9]]*\([[a-z]]*\)'`
 248                     if test "x$openssl_version_req_revision" = "x"; then
 249                         openssl_version_req_revision="0"
 250                     fi
 251                     if test "x$openssl_version_req_patch" = "x"; then
 252                         openssl_version_req_patch="\`"
 253                     fi
 254
 255                     openssl_version_req_number=`expr $openssl_version_req_major \* $((0x10000000)) \
 256                                                \+ $openssl_version_req_minor \* $((0x100000)) \
 257                                                \+ $openssl_version_req_revision \* $((0x1000)) \
 258                                                \+ $((1 + $(printf "%d" \'$openssl_version_req_patch) - $(printf "%d" \'a))) \* $((0x10)) \
 259                                                \+ $((0xf))`
 260
 261                     dnl Calculate numerical representation of detected version
 262                     openssl_version_number=`expr $(($(grep OPENSSL_VERSION_NUMBER $openssl_include_dir/openssl/opensslv.h | cut -f 2 | tr -d L)))`
 263
 264                     openssl_version_check=`expr $openssl_version_number \>\= $openssl_version_req_number`
 265                     if test "$openssl_version_check" = "1"; then
 266                         AC_MSG_RESULT([yes])
 267                     else
 268                         AC_MSG_RESULT([no])
 269                         AC_MSG_WARN([Found $OPENSSL_VERSION, which is older than required. Possible compilation failure.])
 270                     fi
 271                 else
 272                     AC_MSG_RESULT([no])
 273                     AC_MSG_WARN([Missing header openssl/opensslv.h. Unable to determine OpenSSL version.])
 274                 fi
 275             fi
 276         fi
 277
 278     else
 279         HAVE_OPENSSL="no"
 280         AC_MSG_RESULT([$HAVE_OPENSSL])
 281
 282         if test "$openssl_requested" = "yes"; then
 283             AC_MSG_WARN([OpenSSL support requested but headers or library not found. Specify valid prefix of OpenSSL using --with-openssl=@<:@DIR@:>@])
 284         fi
 285     fi
 286     if test "$HAVE_OPENSSL" = "yes"; then
 287         CPPFLAGS="$CPPFLAGS $OPENSSL_CPPFLAGS -DHAVE_SSL=1"
 288         LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS $OPENSSL_LIBS"
 289     fi
 290 ])