@@ -267,6 +267,18 @@ AC_ARG_ENABLE(
[enable_wolfssl_options_h="yes"]
)
+AC_ARG_WITH(
+ [openssl-engine],
+ [AS_HELP_STRING([--with-openssl-engine], [enable engine support with OpenSSL. Default enabled for OpenSSL < 3.0, auto,yes,no @<:@default=auto@:>@])],
+ [
+ case "${withval}" in
+ auto|yes|no) ;;
+ *) AC_MSG_ERROR([bad value ${withval} for --with-engine]) ;;
+ esac
+ ],
+ [with_openssl_engine="auto"]
+)
+
AC_ARG_VAR([PLUGINDIR], [Path of plug-in directory @<:@default=LIBDIR/openvpn/plugins@:>@])
if test -n "${PLUGINDIR}"; then
plugindir="${PLUGINDIR}"
@@ -800,23 +812,45 @@ if test "${with_crypto_library}" = "openssl"; then
[AC_MSG_ERROR([openssl check failed])]
)
- have_openssl_engine="yes"
- AC_CHECK_FUNCS(
- [ \
- ENGINE_load_builtin_engines \
- ENGINE_register_all_complete \
- ENGINE_cleanup \
- ],
- ,
- [have_openssl_engine="no"; break]
- )
- if test "${have_openssl_engine}" = "no"; then
- AC_CHECK_DECL( [ENGINE_cleanup], [have_openssl_engine="yes"],,
- [[
- #include <openssl/engine.h>
- ]]
- )
- fi
+ if test "${with_openssl_engine}" = "auto"; then
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[
+ #include <openssl/opensslv.h>
+ ]],
+ [[
+ /* Version encoding: MNNFFPPS - see opensslv.h for details */
+ #if OPENSSL_VERSION_NUMBER >= 0x30000000L
+ #error Engine supported disabled by default in OpenSSL 3.0+
+ #endif
+ ]]
+ )],
+ [have_openssl_engine="yes"],
+ [have_openssl_engine="no"]
+ )
+ if test "${have_openssl_engine}" = "yes"; then
+ AC_CHECK_FUNCS(
+ [ \
+ ENGINE_load_builtin_engines \
+ ENGINE_register_all_complete \
+ ],
+ ,
+ [have_openssl_engine="no"; break]
+ )
+ fi
+ else
+ have_openssl_engine="${with_openssl_engine}"
+ if test "${have_openssl_engine}" = "yes"; then
+ AC_CHECK_FUNCS(
+ [ \
+ ENGINE_load_builtin_engines \
+ ENGINE_register_all_complete \
+ ],
+ ,
+ [AC_MSG_ERROR([OpenSSL engine support not found])]
+ )
+ fi
+ fi
if test "${have_openssl_engine}" = "yes"; then
AC_DEFINE([HAVE_OPENSSL_ENGINE], [1], [OpenSSL engine support available])
fi
This allows to select engine support at configure time. For OpenSSL 1.1 the default is not changed and we detect if engine support is available. Engine support is deprecated in OpenSSL 3.0 and for OpenSSL 3.0 the default is to disable engine support as engine support is deprecated and generates compiler warnings which in turn also break -Werror. By using --with-openssl-engine=no or --with-openssl-engine=yes engine support can be forced on or off. If it is enabled but not detected an error will be thown. This commit cleans up the configurelogic a bit and removes the ENGINE_cleanup checks as we can just assume that it will be also available as macro or function if the other engine functions are available. Before the cleanup we would only check for the existance of engine.h if ENGINE_cleanup was not found. Signed-off-by: Arne Schwabe <arne@rfc2549.org> --- configure.ac | 68 +++++++++++++++++++++++++++++++++++++++------------- 1 file changed, 51 insertions(+), 17 deletions(-)