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dnl -------------------------------------------------------------------------
dnl $Id$
dnl
dnl tls.m4
dnl
dnl ACE M4 include file which contains ACE specific M4 macros
dnl that determine availablility of SSL/TLS support.
dnl
dnl -------------------------------------------------------------------------
dnl Copyright (C) 2003 Ossama Othman
dnl
dnl All Rights Reserved
dnl
dnl This library is free software; you can redistribute it and/or
dnl modify it under the current ACE distribution terms.
dnl
dnl This library is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
dnl TLS/SSL library IO check
dnl Use this macro to determine if TLS/SSL support is available on the
dnl current host.
dnl Usage: ACE_CHECK_TLS
AC_DEFUN([ACE_CHECK_TLS],
[
AC_REQUIRE([AC_PROG_CXX])
AC_REQUIRE([AC_PROG_CXXCPP])
AC_LANG([C++])
AC_REQUIRE([AC_LANG])
dnl Save the current library and preprocessor flagslist. We do not
dnl want to add the SSL/TLS-specific ones to the general library link
dnl and preprocessor flags list since they should only be used when
dnl building the ACE_SSL library and/or binaries that use the ACE_SSL
dnl library.
ace_save_LIBS="$LIBS"
ace_save_CPPFLAGS="$CPPFLAGS"
ace_save_LDFLAGS="$LDFLAGS"
dnl ---------------------------------------------------------
ace_TLS_CPPFLAGS=""
ace_TLS_LDFLAGS=""
dnl Check if OpenSSL requires the Kerberos include directory to be
dnl added to the header search path.
AC_CACHE_CHECK([for Kerberos include flags needed by OpenSSL],
[ac_cv_kerberos_dir],
[
dnl Try compiling without any Kerberos-specific flags first.
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([
#include <openssl/ssl.h>
],
[
// ... THIS CODE DOES NOTHING! IT IS JUST USED FOR COMPILE TESTS ...
// ... Perform TCP connection ...
// ... Perform TLS/SSL stuff ...
CRYPTO_set_locking_callback (0);
SSLeay_add_ssl_algorithms ();
SSL_load_error_strings ();
SSL_METHOD * meth = TLSv1_method ();
SSL_CTX * ctx = SSL_CTX_new (meth);
SSL * ssl = SSL_new (ctx);
int fd = 2000; // Dummy file descriptor value.
SSL_set_fd (ssl, fd);
SSL_connect (ssl);
SSL_shutdown (ssl);
// ...
])
],
[
ac_cv_kerberos_dir=no
],
[
ace_kerberos_dir=""
for ace_kerberos in /usr /usr/local; do
ace_kerberos_dir="${ace_kerberos}/kerberos/include"
ace_TLS_CPPFLAGS="-I${ace_kerberos_dir}"
CPPFLAGS="$ace_TLS_CPPFLAGS $ace_save_CPPFLAGS"
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([
#include <openssl/ssl.h>
],
[
// ... THIS CODE DOES NOTHING! IT IS JUST USED FOR COMPILE TESTS ...
// ... Perform TCP connection ...
// ... Perform TLS/SSL stuff ...
CRYPTO_set_locking_callback (0);
SSLeay_add_ssl_algorithms ();
SSL_load_error_strings ();
SSL_METHOD * meth = TLSv1_method ();
SSL_CTX * ctx = SSL_CTX_new (meth);
SSL * ssl = SSL_new (ctx);
int fd = 2000; // Dummy file descriptor value.
SSL_set_fd (ssl, fd);
SSL_connect (ssl);
SSL_shutdown (ssl);
// ...
])
],
[
ac_cv_kerberos_dir="$ace_kerberos_dir"
break
],
[
ac_cv_kerberos_dir=no
])
done
])
])
AS_IF([test "$ac_cv_kerberos_dir" = no],
[
AC_SUBST([ACE_KERBEROS_INCLUDES],[.])
],
[
AC_SUBST([ACE_TLS_CPPFLAGS],[-I${ac_cv_kerberos_dir}])
AC_SUBST([ACE_KERBEROS_INCLUDES],[$ac_cv_kerberos_dir])
])
dnl ---------------------------------------------------------
dnl Add the TLS/SSL libraries to the library list.
ace_TLS_LIBS="-lssl -lcrypto"
LIBS="$ace_TLS_LIBS $LIBS"
LDFLAGS="$ACE_TLS_LDFLAGS $LDFLAGS"
AC_CACHE_CHECK([for OpenSSL libraries],
[ac_cv_openssl_libs],
[
AC_LINK_IFELSE([
AC_LANG_PROGRAM([
#include <openssl/ssl.h>
],
[
// ... THIS PROGRAM DOES NOTHING! IT IS JUST USED FOR LINK TESTS ...
// ... Perform TCP connection ...
// ... Perform TLS/SSL stuff ...
CRYPTO_set_locking_callback (0);
SSLeay_add_ssl_algorithms ();
SSL_load_error_strings ();
SSL_METHOD * meth = TLSv1_method ();
SSL_CTX * ctx = SSL_CTX_new (meth);
SSL * ssl = SSL_new (ctx);
int fd = 2000; // Dummy file descriptor value.
SSL_set_fd (ssl, fd);
SSL_connect (ssl);
SSL_shutdown (ssl);
// ...
])
],
[
ac_cv_openssl_libs=yes
],
[
ac_cv_openssl_libs=no
])
])
AS_IF([test $ac_cv_openssl_libs != no],
[AC_SUBST([ACE_TLS_LIBS],[$ace_TLS_LIBS])],
[])
AM_CONDITIONAL([BUILD_SSL], [test X$ace_user_with_ssl = Xyes])
dnl Restore the original library list and preprocessor flags.
LIBS="$ace_save_LIBS"
CPPFLAGS="$ace_save_CPPFLAGS"
LDFLAGS="$ace_save_LDFLAGS"
])
|
