New checker for OpenSSL.

1 files changed, 272 insertions, 0 deletions

diff --git a/m4/ax_lib_openssl.m4 b/m4/ax_lib_openssl.m4
new file mode 100644
index 0000000..b8eaf54
--- /dev/null
+++ b/m4/ax_lib_openssl.m4
@@ -0,0 +1,272 @@
+# ===========================================================================
+#             ax_lib_openssl.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_LIB_OPENSSL([MINIMUM-VERSION])
+#
+# DESCRIPTION
+#
+#   This macro provides tests of availability of OpenSSL of
+#   particular version or newer. This macros checks for OpenSSL
+#   headers and libraries and defines compilation flags
+#
+#   Macro supports following options and their values:
+#
+#   1) Single-option usage:
+#
+#     --with-openssl - yes, no or path to OpenSSL installation prefix
+#
+#   This macro calls:
+#
+#     AC_SUBST(OPENSSL_CFLAGS)
+#     AC_SUBST(OPENSSL_LDFLAGS)
+#     AC_SUBST(OPENSSL_VERSION) - only if version requirement is used
+#
+#   And sets:
+#
+#     HAVE_OPENSSL
+#
+# LAST MODIFICATION
+#
+#   2008-04-12
+#
+# COPYLEFT
+#
+#   Copyright (c) 2008 Mateusz Loskot <mateusz@loskot.net>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved.
+
+AC_DEFUN([AX_LIB_OPENSSL],
+[
+    AC_ARG_WITH([openssl],
+        AC_HELP_STRING([--with-openssl=@<:@ARG@:>@],
+            [use OpenSSL from given prefix (ARG=path); check standard prefixes (ARG=yes); disable (ARG=no)]
+        ),
+        [
+        if test "$withval" = "yes"; then
+            if test -d /usr/local/ssl/include ; then
+                openssl_prefix=/usr/local/ssl
+            elif test -d /usr/lib/ssl/include ; then
+                openssl_prefix=/usr/lib/ssl
+            else
+                openssl_prefix=""
+            fi
+            openssl_requested="yes"
+        elif test -d "$withval"; then
+            openssl_prefix="$withval"
+            openssl_requested="yes"
+        else
+            openssl_prefix=""
+            openssl_requested="no"
+        fi
+        ],
+        [
+        dnl Default behavior is implicit yes
+        if test -d /usr/local/ssl/include ; then
+            openssl_prefix=/usr/local/ssl
+        elif test -d /usr/lib/ssl/include ; then
+            openssl_prefix=/usr/lib/ssl
+        else
+            openssl_prefix=""
+        fi
+        ]
+    )
+
+    OPENSSL_CPPFLAGS=""
+    OPENSSL_LDFLAGS=""
+    OPENSSL_VERSION=""
+
+    dnl
+    dnl Collect include/lib paths and flags
+    dnl
+    run_openssl_test="no"
+
+    if test -n "$openssl_prefix"; then
+        openssl_include_dir="$openssl_prefix/include"
+        openssl_ldflags="-L$openssl_prefix/lib"
+        run_openssl_test="yes"
+    elif test "$openssl_requested" = "yes"; then
+        if test -n "$openssl_include_dir" -a -n "$openssl_lib_flags"; then
+            run_openssl_test="yes"
+        fi
+    else
+        run_openssl_test="no"
+    fi
+
+    openssl_libs="-lssl -lcrypto"
+
+    dnl
+    dnl Check OpenSSL files
+    dnl
+    if test "$run_openssl_test" = "yes"; then
+
+        saved_CPPFLAGS="$CPPFLAGS"
+        CPPFLAGS="$CPPFLAGS -I$openssl_include_dir"
+
+        saved_LDFLAGS="$LDFLAGS"
+        LDFLAGS="$LDFLAGS $openssl_ldflags"
+
+        saved_LIBS="$LIBS"
+        LIBS="$openssl_libs $LIBS"
+
+        dnl
+        dnl Check OpenSSL headers
+        dnl
+        AC_MSG_CHECKING([for OpenSSL headers in $openssl_include_dir])
+
+        AC_LANG_PUSH([C])
+        AC_COMPILE_IFELSE([
+            AC_LANG_PROGRAM(
+                [[
+@%:@include <openssl/opensslv.h>
+@%:@include <openssl/ssl.h>
+@%:@include <openssl/crypto.h>
+                ]],
+                [[]]
+            )],
+            [
+            OPENSSL_CPPFLAGS="-I$openssl_include_dir"
+            openssl_header_found="yes"
+            AC_MSG_RESULT([found])
+            ],
+            [
+            openssl_header_found="no"
+            AC_MSG_RESULT([not found])
+            ]
+        )
+        AC_LANG_POP([C])
+
+        dnl
+        dnl Check OpenSSL libraries
+        dnl
+        if test "$openssl_header_found" = "yes"; then
+
+            AC_MSG_CHECKING([for OpenSSL libraries])
+
+            AC_LANG_PUSH([C])
+            AC_LINK_IFELSE([
+                AC_LANG_PROGRAM(
+                    [[
+@%:@include <openssl/opensslv.h>
+@%:@include <openssl/ssl.h>
+@%:@include <openssl/crypto.h>
+#if (OPENSSL_VERSION_NUMBER < 0x0090700f)
+deliberate syntax error
+#endif
+                    ]],
+                    [[
+SSL_library_init();
+SSLeay();
+                    ]]
+                )],
+                [
+                OPENSSL_LDFLAGS="$openssl_ldflags"
+                OPENSSL_LIBS="$openssl_libs"
+                openssl_lib_found="yes"
+                AC_MSG_RESULT([found])
+                ],
+                [
+                openssl_lib_found="no"
+                AC_MSG_RESULT([not found])
+                ]
+            )
+            AC_LANG_POP([C])
+        fi
+
+        CPPFLAGS="$saved_CPPFLAGS"
+        LDFLAGS="$saved_LDFLAGS"
+        LIBS="$saved_LIBS"
+    fi
+
+    AC_MSG_CHECKING([for OpenSSL])
+
+    if test "$run_openssl_test" = "yes"; then
+        if test "$openssl_header_found" = "yes" -a "$openssl_lib_found" = "yes"; then
+
+            AC_SUBST([OPENSSL_CPPFLAGS])
+            AC_SUBST([OPENSSL_LDFLAGS])
+            AC_SUBST([OPENSSL_LIBS])
+
+            HAVE_OPENSSL="yes"
+        else
+            HAVE_OPENSSL="no"
+        fi
+
+        AC_MSG_RESULT([$HAVE_OPENSSL])
+
+        dnl
+        dnl Check OpenSSL version
+        dnl
+        if test "$HAVE_OPENSSL" = "yes"; then
+
+            openssl_version_req=ifelse([$1], [], [], [$1])
+
+            if test  -n "$openssl_version_req"; then
+
+                AC_MSG_CHECKING([if OpenSSL version is >= $openssl_version_req])
+
+                if test -f "$openssl_include_dir/xercesc/util/XercesVersion.hpp"; then
+
+                    openssl_major=`cat $xerces_include_dir/xercesc/util/XercesVersion.hpp | \
+                                    grep '^#define.*OPENSSL_VERSION_MAJOR.*[0-9]$' | \
+                                    sed -e 's/#define OPENSSL_VERSION_MAJOR.//'`
+
+                    openssl_minor=`cat $xerces_include_dir/xercesc/util/XercesVersion.hpp | \
+                                    grep '^#define.*OPENSSL_VERSION_MINOR.*[0-9]$' | \
+                                    sed -e 's/#define OPENSSL_VERSION_MINOR.//'`
+
+                    openssl_revision=`cat $xerces_include_dir/xercesc/util/XercesVersion.hpp | \
+                                    grep '^#define.*OPENSSL_VERSION_REVISION.*[0-9]$' | \
+                                    sed -e 's/#define OPENSSL_VERSION_REVISION.//'`
+
+                    OPENSSL_VERSION="$xerces_major.$xerces_minor.$xerces_revision"
+                    AC_SUBST([OPENSSL_VERSION])
+
+                    dnl Decompose required version string and calculate numerical representation
+                    xerces_version_req_major=`expr $xerces_version_req : '\([[0-9]]*\)'`
+                    xerces_version_req_minor=`expr $xerces_version_req : '[[0-9]]*\.\([[0-9]]*\)'`
+                    xerces_version_req_revision=`expr $xerces_version_req : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
+                    if test "x$openssl_version_req_revision" = "x"; then
+                        openssl_version_req_revision="0"
+                    fi
+
+                    openssl_version_req_number=`expr $xerces_version_req_major \* 10000 \
+                                               \+ $xerces_version_req_minor \* 100 \
+                                               \+ $xerces_version_req_revision`
+
+                    dnl Calculate numerical representation of detected version
+                    openssl_version_number=`expr $xerces_major \* 10000 \
+                                          \+ $xerces_minor \* 100 \
+                                           \+ $xerces_revision`
+
+                    openssl_version_check=`expr $openssl_version_number \>\= $openssl_version_req_number`
+                    if test "$openssl_version_check" = "1"; then
+                        AC_MSG_RESULT([yes])
+                    else
+                        AC_MSG_RESULT([no])
+                        AC_MSG_WARN([Found OpenSSL $OPENSSL_VERSION, which is older than required. Possible compilation failure.])
+                    fi
+                else
+                    AC_MSG_RESULT([no])
+                    AC_MSG_WARN([Missing header XercesVersion.hpp. Unable to determine Xerces version.])
+                fi
+            fi
+        fi
+
+    else
+        HAVE_OPENSSL="no"
+        AC_MSG_RESULT([$HAVE_OPENSSL])
+
+        if test "$openssl_requested" = "yes"; then
+            AC_MSG_WARN([OpenSSL support requested but headers or library not found. Specify valid prefix of OpenSSL using --with-openssl=@<:@DIR@:>@])
+        fi
+    fi
+    if test "$HAVE_OPENSSL" = "yes"; then
+        CPPFLAGS="$CPPFLAGS $OPENSSL_CPPFLAGS -DHAVE_SSL=1"
+        LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS $OPENSSL_LIBS"
+    fi
+])