AC_DEFUN([SUDO_CHECK_OPENSSL], [
openssl_missing=no
if test "${enable_openssl-no}" != no; then
# Use pkg-config to find the openssl cflags and libs if possible.
if test "$enable_openssl" != "yes" -a "$enable_openssl" != "maybe"; then
PKG_CONFIG_LIBDIR=
for d in ${enable_openssl}/*/pkgconfig; do
if test -d "$d"; then
PKG_CONFIG_LIBDIR="$PKG_CONFIG_LIBDIR:$d"
fi
done
if test -n "$PKG_CONFIG_LIBDIR"; then
PKG_CONFIG_LIBDIR=${PKG_CONFIG_LIBDIR#:}
export PKG_CONFIG_LIBDIR
fi
elif test "$cross_compiling" = "yes" -a -z "$PKG_CONFIG"; then
# Cannot use pkg-config when cross-compiling
PKG_CONFIG=false
fi
: ${PKG_CONFIG='pkg-config'}
pkg_openssl=`printf $enable_openssl_pkgconfig_template "openssl"`
pkg_libcrypto=lib`printf $enable_openssl_pkgconfig_template "crypto"`
if $PKG_CONFIG --exists "$pkg_openssl >= 1.0.1" >/dev/null 2>&1; then
AC_DEFINE(HAVE_OPENSSL)
if test "$enable_openssl" = "maybe"; then
enable_openssl=yes
fi
# Check whether --static is needed (don't assume name of ssl lib)
# There may be dependent libraries or -pthread.
O_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS `$PKG_CONFIG --libs-only-L $pkg_openssl`"
libssl="`$PKG_CONFIG --libs-only-l $pkg_openssl | sed 's/^ *-l//'`"
libssl_extra="`echo $libssl | sed 's/^[[^ ]]* *//'`"
libssl="`echo $libssl | sed 's/ .*//'`"
AC_CHECK_LIB([$libssl], [SSL_new], [STATIC=""], [STATIC="--static"], [$libssl_extra])
LDFLAGS="$O_LDFLAGS"
# Use pkg-config to determine OpenSSL libs and cflags
for f in `$PKG_CONFIG $STATIC --libs $pkg_openssl`; do
case "$f" in
-L*)
f="${f#-L}"
SUDO_APPEND_LIBPATH([LIBTLS], [$f])
;;
*)
# Do not use AX_APPEND_FLAG as it will break static builds by removing
# duplicates such as -lz or -latomic which are needed by -lssl and -lcrypto
LIBTLS="$LIBTLS $f"
;;
esac
done
if $PKG_CONFIG --exists $pkg_libcrypto >/dev/null 2>&1; then
# Use OpenSSL's sha2 functions if possible (don't assume name of crypto)
O_LDFLAGS="$LDFLAGS"
libcrypto=
libcrypto_extra=
for f in `$PKG_CONFIG $STATIC --libs $pkg_libcrypto`; do
case "$f" in
-l*)
if test -z "$libcrypto"; then
libcrypto="${f#-l}"
else
libcrypto_extra="$libcrypto_extra $f"
fi
;;
*)
AX_APPEND_FLAG([$f], [LDFLAGS])
;;
esac
done
AC_CHECK_LIB([$libcrypto], [EVP_MD_CTX_new], [DIGEST=digest_openssl.lo], [], [$libcrypto_extra])
LDFLAGS="$O_LDFLAGS"
# Use pkg-config to determine libcrypto libs and cflags
for f in `$PKG_CONFIG $STATIC --libs $pkg_libcrypto`; do
case "$f" in
-L*)
f="${f#-L}"
SUDO_APPEND_LIBPATH([LIBCRYPTO], [$f])
;;
*)
AX_APPEND_FLAG([$f], [LIBCRYPTO])
;;
esac
done
else
# No separate pkg config for libcrypto
LIBCRYPTO="$LIBTLS"
LIBCRYPTO_R="$LIBTLS_R"
fi
for f in `$PKG_CONFIG --cflags-only-I $pkg_openssl`; do
AX_APPEND_FLAG([$f], [CPPFLAGS])
done
else
# No pkg-config file present, try to do it manually
O_LDFLAGS="$LDFLAGS"
if test "$enable_openssl" != "yes" -a "$enable_openssl" != "maybe"; then
SUDO_APPEND_LIBPATH(LDFLAGS, [${enable_openssl}/lib])
fi
AC_CHECK_LIB([ssl], [SSL_new], [
# Check OPENSSL_VERSION_NUMBER in headers
O_CPPFLAGS="$CPPFLAGS"
if test "$enable_openssl" != "yes" -a "$enable_openssl" != "maybe"; then
# Note: we only reset CPPFLAGS on failure
AX_APPEND_FLAG([-I${enable_openssl}/include], [CPPFLAGS])
fi
AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[#include <openssl/opensslv.h>
#if !defined(OPENSSL_VERSION_NUMBER) || OPENSSL_VERSION_NUMBER < 0x1000100fL
#error "OpenSSL too old"
#endif
]])], [
# OpenSSL >= 1.0.1 detected, use it.
AC_DEFINE(HAVE_OPENSSL)
if test "$enable_openssl" != "yes" -a "$enable_openssl" != "maybe"; then
SUDO_APPEND_LIBPATH(LIBCRYPTO, [${enable_openssl}/lib])
SUDO_APPEND_LIBPATH(LIBTLS, [${enable_openssl}/lib])
else
enable_openssl=yes
fi
LIBCRYPTO="${LIBCRYPTO} -lcrypto"
LIBTLS="${LIBTLS} -lssl -lcrypto"
# Use OpenSSL's sha2 functions if possible
AC_CHECK_LIB([crypto], [EVP_MD_CTX_new], [
DIGEST=digest_openssl.lo
])
], [
# OpenSSL < 1.0.1 detected, ignore it.
if test "$enable_openssl" = "maybe"; then
AC_MSG_WARN([OpenSSL too old (1.0.1 or higher required), Sudo logsrv connections will not be encrypted.])
openssl_missing=yes
enable_openssl=no
else
AC_MSG_ERROR([OpenSSL too old (1.0.1 or higher required).])
fi
CPPFLAGS="$O_CPPFLAGS"
])
], [
if test "$enable_openssl" = "maybe"; then
openssl_missing=yes
enable_openssl=no
else
AC_MSG_ERROR([OpenSSL development libraries not found.])
fi
], [-lcrypto])
LDFLAGS="$O_LDFLAGS"
fi
if test "$enable_openssl" != "yes" -a "$enable_openssl" != "maybe"; then
unset PKG_CONFIG_LIBDIR
fi
fi
#
# Note that enable_openssl may be reset above.
#
if test "${enable_openssl-no}" != no; then
OLIBS="$LIBS"
LIBS="$LIBS $LIBTLS"
AC_CHECK_FUNCS([X509_STORE_CTX_get0_cert ASN1_STRING_get0_data SSL_CTX_get0_certificate SSL_CTX_set0_tmp_dh_pkey TLS_method])
# SSL_CTX_set_min_proto_version may be a macro
AC_CHECK_DECL([SSL_CTX_set_min_proto_version], [AC_DEFINE(HAVE_SSL_CTX_SET_MIN_PROTO_VERSION)], [], [
AC_INCLUDES_DEFAULT
#include <openssl/ssl.h>
])
AC_CHECK_FUNCS([SSL_read_ex], [], [
SSL_COMPAT_SRC=lib/ssl_compat
])
# LibreSSL TLS 1.3 support may not be enabled, check for declaration too.
AC_CHECK_FUNC([SSL_CTX_set_ciphersuites], [
AC_CHECK_DECL([SSL_CTX_set_ciphersuites], [AC_DEFINE(HAVE_SSL_CTX_SET_CIPHERSUITES)], [], [
AC_INCLUDES_DEFAULT
#include <openssl/ssl.h>
])
])
LIBS="$OLIBS"
elif test "${enable_wolfssl-no}" != no; then
# Check for OpenSSL compatibility functions in wolfSSL.
# Use pkg-config to find the wolfssl cflags and libs if possible.
if test "$enable_wolfssl" != "yes"; then
PKG_CONFIG_LIBDIR="${enable_wolfssl}/lib/pkgconfig:${enable_wolfssl}/lib64/pkgconfig:${enable_wolfssl}/share/pkgconfig"
export PKG_CONFIG_LIBDIR
elif test "$cross_compiling" = "yes" -a -z "$PKG_CONFIG"; then
# Cannot use pkg-config when cross-compiling
PKG_CONFIG=false
fi
: ${PKG_CONFIG='pkg-config'}
if $PKG_CONFIG --exists wolfssl >/dev/null 2>&1; then
AC_DEFINE(HAVE_OPENSSL)
AC_DEFINE(HAVE_WOLFSSL)
O_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS `$PKG_CONFIG --cflags-only-I wolfssl`"
O_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS `$PKG_CONFIG --libs-only-L wolfssl`"
# Check whether --static is needed
libssl="`$PKG_CONFIG --libs-only-l wolfssl | sed 's/^ *-l//'`"
libssl_extra=`echo $libssl | sed 's/^[[^ ]]* *//'`
libssl=`echo $libssl | sed 's/ .*//'`
AC_CHECK_LIB([$libssl], [wolfSSL_new], [STATIC=""], [STATIC="--static"], [$libssl_extra])
# Use wolfSSL's sha2 functions if possible
AC_CHECK_DECL([EVP_MD_CTX_new], [DIGEST=digest_openssl.lo], [], [
AC_INCLUDES_DEFAULT
#include <wolfssl/options.h>
#include <wolfssl/openssl/evp.h>
])
CPPFLAGS="$O_CPPFLAGS"
LDFLAGS="$O_LDFLAGS"
# Use pkg-config to determine wolfSSL libs and cflags
for f in `$PKG_CONFIG $STATIC --libs wolfssl`; do
case "$f" in
-L*)
f="${f#-L}"
SUDO_APPEND_LIBPATH([LIBTLS], [$f])
;;
*)
AX_APPEND_FLAG([$f], [LIBTLS])
;;
esac
done
# No separate pkg config for libcrypto
LIBCRYPTO="$LIBTLS"
LIBCRYPTO_R="$LIBTLS_R"
for f in `$PKG_CONFIG --cflags-only-I wolfssl`; do
AX_APPEND_FLAG([$f], [CPPFLAGS])
# So we find the openssl compat headers under wolfssl
AX_APPEND_FLAG([$f/wolfssl], [CPPFLAGS])
done
if test "$cross_compiling" != "yes" -a "$CPPFLAGS" = "$O_CPPFLAGS"; then
# So we find the openssl compat headers under wolfssl (XXX)
AX_APPEND_FLAG([-I/usr/include/wolfssl], [CPPFLAGS])
fi
else
AC_DEFINE(HAVE_OPENSSL)
AC_DEFINE(HAVE_WOLFSSL)
# No pkg-config file present, try to do it manually
if test "$enable_wolfssl" != "yes"; then
SUDO_APPEND_LIBPATH(LIBCRYPTO, [${enable_wolfssl}/lib])
SUDO_APPEND_LIBPATH(LIBTLS, [${enable_wolfssl}/lib])
AX_APPEND_FLAG([-I${enable_wolfssl}/include], [CPPFLAGS])
# So we find the openssl compat headers under wolfssl
AX_APPEND_FLAG([-I${enable_wolfssl}/include/wolfssl], [CPPFLAGS])
else
# So we find the openssl compat headers under wolfssl (XXX)
AX_APPEND_FLAG([-I/usr/include/wolfssl], [CPPFLAGS])
fi
LIBTLS="${LIBTLS} -lwolfssl"
LIBCRYPTO="${LIBCRYPTO} -lwolfssl"
# Use wolfSSL's sha2 functions if possible
AC_CHECK_DECL([EVP_MD_CTX_new], [DIGEST=digest_openssl.lo], [], [
AC_INCLUDES_DEFAULT
#include <wolfssl/options.h>
#include <wolfssl/openssl/evp.h>
])
fi
dnl
dnl Check for specific OpenSSL API compatibility macros
dnl
AC_CHECK_DECL([X509_STORE_CTX_get0_cert], [AC_DEFINE(HAVE_X509_STORE_CTX_GET0_CERT)], [], [
AC_INCLUDES_DEFAULT
#include <wolfssl/options.h>
#include <wolfssl/openssl/x509.h>
])
AC_CHECK_DECL([ASN1_STRING_get0_data], [AC_DEFINE(HAVE_ASN1_STRING_GET0_DATA)], [], [
AC_INCLUDES_DEFAULT
#include <wolfssl/options.h>
#include <wolfssl/openssl/asn1.h>
])
AC_CHECK_DECL([SSL_CTX_get0_certificate], [AC_DEFINE(HAVE_SSL_CTX_GET0_CERTIFICATE)], [], [
AC_INCLUDES_DEFAULT
#include <wolfssl/options.h>
#include <wolfssl/openssl/ssl.h>
])
AC_CHECK_DECL([SSL_CTX_set0_tmp_dh_pkey], [AC_DEFINE(HAVE_SSL_CTX_SET0_TMP_DH_PKEY)], [], [
AC_INCLUDES_DEFAULT
#include <wolfssl/options.h>
#include <wolfssl/openssl/ssl.h>
])
AC_CHECK_DECL([TLS_method], [AC_DEFINE(HAVE_TLS_METHOD)], [], [
AC_INCLUDES_DEFAULT
#include <wolfssl/options.h>
#include <wolfssl/openssl/ssl.h>
])
AC_CHECK_DECL([SSL_CTX_set_min_proto_version], [AC_DEFINE(HAVE_SSL_CTX_SET_MIN_PROTO_VERSION)], [], [
AC_INCLUDES_DEFAULT
#include <wolfssl/options.h>
#include <wolfssl/openssl/ssl.h>
])
AC_CHECK_DECL([SSL_CTX_set_ciphersuites], [AC_DEFINE(HAVE_SSL_CTX_SET_CIPHERSUITES)], [], [
AC_INCLUDES_DEFAULT
#include <wolfssl/options.h>
#include <wolfssl/openssl/ssl.h>
])
AC_CHECK_DECL([SSL_read_ex], [AC_DEFINE(HAVE_SSL_READ_EX)], [
SSL_COMPAT_SRC=lib/ssl_compat
], [
AC_INCLUDES_DEFAULT
#include <wolfssl/options.h>
#include <wolfssl/openssl/ssl.h>
])
fi
if test -n "$SSL_COMPAT_SRC"; then
LIBTLS='$(top_builddir)/lib/ssl_compat/libssl_compat.la '"${LIBTLS}"
fi
])
