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curl-openssl.m4
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#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <[email protected]>, 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.
#
# SPDX-License-Identifier: curl
#
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
# serial 5
dnl **********************************************************************
dnl Check for OpenSSL libraries and headers
dnl **********************************************************************
AC_DEFUN([CURL_WITH_OPENSSL], [
if test "x$OPT_OPENSSL" != xno; then
ssl_msg=
dnl backup the pre-ssl variables
CLEANLDFLAGS="$LDFLAGS"
CLEANCPPFLAGS="$CPPFLAGS"
CLEANLIBS="$LIBS"
dnl This is for Msys/Mingw
case $host in
*-*-msys* | *-*-mingw*)
AC_MSG_CHECKING([for gdi32])
my_ac_save_LIBS=$LIBS
LIBS="-lgdi32 $LIBS"
AC_LINK_IFELSE([ AC_LANG_PROGRAM([[
#include <windef.h>
#include <wingdi.h>
]],
[[
GdiFlush();
]])],
[ dnl worked!
AC_MSG_RESULT([yes])],
[ dnl failed, restore LIBS
LIBS=$my_ac_save_LIBS
AC_MSG_RESULT(no)]
)
;;
esac
case "$OPT_OPENSSL" in
yes)
dnl --with-openssl (without path) used
PKGTEST="yes"
PREFIX_OPENSSL=
;;
*)
dnl check the given --with-openssl spot
PKGTEST="no"
PREFIX_OPENSSL=$OPT_OPENSSL
dnl Try pkg-config even when cross-compiling. Since we
dnl specify PKG_CONFIG_LIBDIR we're only looking where
dnl the user told us to look
OPENSSL_PCDIR="$OPT_OPENSSL/lib/pkgconfig"
if test -f "$OPENSSL_PCDIR/openssl.pc"; then
AC_MSG_NOTICE([PKG_CONFIG_LIBDIR will be set to "$OPENSSL_PCDIR"])
PKGTEST="yes"
fi
if test "$PKGTEST" != "yes"; then
# try lib64 instead
OPENSSL_PCDIR="$OPT_OPENSSL/lib64/pkgconfig"
if test -f "$OPENSSL_PCDIR/openssl.pc"; then
AC_MSG_NOTICE([PKG_CONFIG_LIBDIR will be set to "$OPENSSL_PCDIR"])
PKGTEST="yes"
fi
fi
if test "$PKGTEST" != "yes"; then
if test ! -f "$PREFIX_OPENSSL/include/openssl/ssl.h"; then
AC_MSG_ERROR([$PREFIX_OPENSSL is a bad --with-openssl prefix!])
fi
fi
dnl in case pkg-config comes up empty, use what we got
dnl via --with-openssl
LIB_OPENSSL="$PREFIX_OPENSSL/lib$libsuff"
if test "$PREFIX_OPENSSL" != "/usr" ; then
SSL_LDFLAGS="-L$LIB_OPENSSL"
SSL_CPPFLAGS="-I$PREFIX_OPENSSL/include"
fi
;;
esac
if test "$PKGTEST" = "yes"; then
CURL_CHECK_PKGCONFIG(openssl, [$OPENSSL_PCDIR])
if test "$PKGCONFIG" != "no" ; then
SSL_LIBS=`CURL_EXPORT_PCDIR([$OPENSSL_PCDIR]) dnl
$PKGCONFIG --libs-only-l --libs-only-other openssl 2>/dev/null`
SSL_LDFLAGS=`CURL_EXPORT_PCDIR([$OPENSSL_PCDIR]) dnl
$PKGCONFIG --libs-only-L openssl 2>/dev/null`
SSL_CPPFLAGS=`CURL_EXPORT_PCDIR([$OPENSSL_PCDIR]) dnl
$PKGCONFIG --cflags-only-I openssl 2>/dev/null`
AC_SUBST(SSL_LIBS)
AC_MSG_NOTICE([pkg-config: SSL_LIBS: "$SSL_LIBS"])
AC_MSG_NOTICE([pkg-config: SSL_LDFLAGS: "$SSL_LDFLAGS"])
AC_MSG_NOTICE([pkg-config: SSL_CPPFLAGS: "$SSL_CPPFLAGS"])
LIB_OPENSSL=`echo $SSL_LDFLAGS | sed -e 's/^-L//'`
dnl use the values pkg-config reported. This is here
dnl instead of below with CPPFLAGS and LDFLAGS because we only
dnl learn about this via pkg-config. If we only have
dnl the argument to --with-openssl we don't know what
dnl additional libs may be necessary. Hope that we
dnl don't need any.
LIBS="$SSL_LIBS $LIBS"
fi
fi
dnl finally, set flags to use SSL
CPPFLAGS="$CPPFLAGS $SSL_CPPFLAGS"
LDFLAGS="$LDFLAGS $SSL_LDFLAGS"
AC_CHECK_LIB(crypto, HMAC_Update,[
HAVECRYPTO="yes"
LIBS="-lcrypto $LIBS"
],[
if test -n "$LIB_OPENSSL" ; then
LDFLAGS="$CLEANLDFLAGS -L$LIB_OPENSSL"
fi
if test "$PKGCONFIG" = "no" -a -n "$PREFIX_OPENSSL" ; then
# only set this if pkg-config wasn't used
CPPFLAGS="$CLEANCPPFLAGS -I$PREFIX_OPENSSL/include"
fi
# Linking previously failed, try extra paths from --with-openssl or
# pkg-config. Use a different function name to avoid reusing the earlier
# cached result.
AC_CHECK_LIB(crypto, HMAC_Init_ex,[
HAVECRYPTO="yes"
LIBS="-lcrypto $LIBS"], [
dnl still no, but what about with -ldl?
AC_MSG_CHECKING([OpenSSL linking with -ldl])
LIBS="-lcrypto $CLEANLIBS -ldl"
AC_LINK_IFELSE([ AC_LANG_PROGRAM([[
#include <openssl/err.h>
]], [[
ERR_clear_error();
]]) ],
[
AC_MSG_RESULT(yes)
HAVECRYPTO="yes"
],
[
AC_MSG_RESULT(no)
dnl ok, so what about both -ldl and -lpthread?
dnl This may be necessary for static libraries.
AC_MSG_CHECKING([OpenSSL linking with -ldl and -lpthread])
LIBS="-lcrypto $CLEANLIBS -ldl -lpthread"
AC_LINK_IFELSE([
AC_LANG_PROGRAM([[
#include <openssl/err.h>
]], [[
ERR_clear_error();
]])],
[
AC_MSG_RESULT(yes)
HAVECRYPTO="yes"
],
[
AC_MSG_RESULT(no)
LDFLAGS="$CLEANLDFLAGS"
CPPFLAGS="$CLEANCPPFLAGS"
LIBS="$CLEANLIBS"
])
])
])
])
if test X"$HAVECRYPTO" = X"yes"; then
dnl This is only reasonable to do if crypto actually is there: check for
dnl SSL libs NOTE: it is important to do this AFTER the crypto lib
AC_CHECK_LIB(ssl, SSL_connect)
if test "$ac_cv_lib_ssl_SSL_connect" != yes; then
dnl we didn't find the SSL lib, try the RSAglue/rsaref stuff
AC_MSG_CHECKING(for ssl with RSAglue/rsaref libs in use);
OLIBS=$LIBS
LIBS="-lRSAglue -lrsaref $LIBS"
AC_CHECK_LIB(ssl, SSL_connect)
if test "$ac_cv_lib_ssl_SSL_connect" != yes; then
dnl still no SSL_connect
AC_MSG_RESULT(no)
LIBS=$OLIBS
else
AC_MSG_RESULT(yes)
fi
else
dnl Have the libraries--check for OpenSSL headers
AC_CHECK_HEADERS(openssl/x509.h openssl/rsa.h openssl/crypto.h \
openssl/pem.h openssl/ssl.h openssl/err.h,
ssl_msg="OpenSSL"
test openssl != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
OPENSSL_ENABLED=1
AC_DEFINE(USE_OPENSSL, 1, [if OpenSSL is in use]))
if test $ac_cv_header_openssl_x509_h = no; then
dnl we don't use the "action" part of the AC_CHECK_HEADERS macro
dnl since 'err.h' might in fact find a krb4 header with the same
dnl name
AC_CHECK_HEADERS(x509.h rsa.h crypto.h pem.h ssl.h err.h)
if test $ac_cv_header_x509_h = yes &&
test $ac_cv_header_crypto_h = yes &&
test $ac_cv_header_ssl_h = yes; then
dnl three matches
ssl_msg="OpenSSL"
OPENSSL_ENABLED=1
fi
fi
fi
if test X"$OPENSSL_ENABLED" != X"1"; then
LIBS="$CLEANLIBS"
fi
if test X"$OPT_OPENSSL" != Xoff &&
test "$OPENSSL_ENABLED" != "1"; then
AC_MSG_ERROR([OpenSSL libs and/or directories were not found where specified!])
fi
fi
if test X"$OPENSSL_ENABLED" = X"1"; then
dnl These can only exist if OpenSSL exists
AC_CHECK_FUNCS( RAND_egd )
AC_MSG_CHECKING([for BoringSSL])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#include <openssl/base.h>
]],[[
#ifndef OPENSSL_IS_BORINGSSL
#error not boringssl
#endif
]])
],[
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_BORINGSSL, 1,
[Define to 1 if using BoringSSL.])
ssl_msg="BoringSSL"
],[
AC_MSG_RESULT([no])
])
AC_MSG_CHECKING([for libressl])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#include <openssl/opensslv.h>
]],[[
int dummy = LIBRESSL_VERSION_NUMBER;
]])
],[
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_LIBRESSL, 1,
[Define to 1 if using libressl.])
ssl_msg="libressl"
],[
AC_MSG_RESULT([no])
])
AC_MSG_CHECKING([for OpenSSL >= v3])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#include <openssl/opensslv.h>
]],[[
#if defined(OPENSSL_VERSION_MAJOR) && (OPENSSL_VERSION_MAJOR >= 3)
return 0;
#else
#error older than 3
#endif
]])
],[
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_OPENSSL3, 1,
[Define to 1 if using OpenSSL 3 or later.])
dnl OpenSSLv3 marks the DES functions deprecated but we have no
dnl replacements (yet) so tell the compiler to not warn for them
dnl
dnl Ask OpenSSL to suppress the warnings.
CPPFLAGS="$CPPFLAGS -DOPENSSL_SUPPRESS_DEPRECATED"
ssl_msg="OpenSSL v3+"
],[
AC_MSG_RESULT([no])
])
fi
if test "$OPENSSL_ENABLED" = "1"; then
if test -n "$LIB_OPENSSL"; then
dnl when the ssl shared libs were found in a path that the run-time
dnl linker doesn't search through, we need to add it to CURL_LIBRARY_PATH
dnl to prevent further configure tests to fail due to this
if test "x$cross_compiling" != "xyes"; then
CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$LIB_OPENSSL"
export CURL_LIBRARY_PATH
AC_MSG_NOTICE([Added $LIB_OPENSSL to CURL_LIBRARY_PATH])
fi
fi
check_for_ca_bundle=1
fi
test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
fi
if test X"$OPT_OPENSSL" != Xno &&
test "$OPENSSL_ENABLED" != "1"; then
AC_MSG_NOTICE([OPT_OPENSSL: $OPT_OPENSSL])
AC_MSG_NOTICE([OPENSSL_ENABLED: $OPENSSL_ENABLED])
AC_MSG_ERROR([--with-openssl was given but OpenSSL could not be detected])
fi
dnl **********************************************************************
dnl Check for the random seed preferences
dnl **********************************************************************
if test X"$OPENSSL_ENABLED" = X"1"; then
AC_ARG_WITH(egd-socket,
AS_HELP_STRING([--with-egd-socket=FILE],
[Entropy Gathering Daemon socket pathname]),
[ EGD_SOCKET="$withval" ]
)
if test -n "$EGD_SOCKET" ; then
AC_DEFINE_UNQUOTED(EGD_SOCKET, "$EGD_SOCKET",
[your Entropy Gathering Daemon socket pathname] )
fi
dnl Check for user-specified random device
AC_ARG_WITH(random,
AS_HELP_STRING([--with-random=FILE],
[read randomness from FILE (default=/dev/urandom)]),
[ RANDOM_FILE="$withval" ],
[
if test x$cross_compiling != xyes; then
dnl Check for random device
AC_CHECK_FILE("/dev/urandom", [ RANDOM_FILE="/dev/urandom"] )
else
AC_MSG_WARN([skipped the /dev/urandom detection when cross-compiling])
fi
]
)
if test -n "$RANDOM_FILE" && test X"$RANDOM_FILE" != Xno ; then
AC_SUBST(RANDOM_FILE)
AC_DEFINE_UNQUOTED(RANDOM_FILE, "$RANDOM_FILE",
[a suitable file to read random data from])
fi
fi
dnl ---
dnl We require OpenSSL with SRP support.
dnl ---
if test "$OPENSSL_ENABLED" = "1"; then
AC_MSG_CHECKING([for SRP support in OpenSSL])
AC_LINK_IFELSE([
AC_LANG_PROGRAM([[
#include <openssl/ssl.h>
]],[[
SSL_CTX_set_srp_username(NULL, "");
SSL_CTX_set_srp_password(NULL, "");
]])
],[
AC_MSG_RESULT([yes])
AC_DEFINE(HAVE_OPENSSL_SRP, 1, [if you have the functions SSL_CTX_set_srp_username and SSL_CTX_set_srp_password])
AC_SUBST(HAVE_OPENSSL_SRP, [1])
],[
AC_MSG_RESULT([no])
])
fi
dnl ---
dnl Whether the OpenSSL configuration will be loaded automatically
dnl ---
if test X"$OPENSSL_ENABLED" = X"1"; then
AC_ARG_ENABLE(openssl-auto-load-config,
AS_HELP_STRING([--enable-openssl-auto-load-config],[Enable automatic loading of OpenSSL configuration])
AS_HELP_STRING([--disable-openssl-auto-load-config],[Disable automatic loading of OpenSSL configuration]),
[ if test X"$enableval" = X"no"; then
AC_MSG_NOTICE([automatic loading of OpenSSL configuration disabled])
AC_DEFINE(CURL_DISABLE_OPENSSL_AUTO_LOAD_CONFIG, 1, [if the OpenSSL configuration won't be loaded automatically])
fi
])
fi
])