Could not load engine on macOS

[x87-va]

Hello.

I have issues when trying to use engine on macOS 11.5 with OpenSSL 1.1.1l installed from Homebrew.

I've built engine from branch openssl_1_1_1 with variables:

export LDFLAGS="-L/usr/local/opt/[email protected]/lib"
export CPPFLAGS="-I/usr/local/opt/[email protected]/include"
export PKG_CONFIG_PATH="/usr/local/opt/[email protected]/lib/pkgconfig"

Also OPENSSL_CONF variable points to openssl.conf from example.

gcc --version:

Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
Apple clang version 12.0.5 (clang-1205.0.22.11)
Target: x86_64-apple-darwin20.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

When I try to load engine with sh openssl engine -vvv:

4402085376:error:2506406A:DSO support routines:dlfcn_bind_func:could not bind to the requested symbol name:crypto/dso/dso_dlfcn.c:188:symname(bind_engine): dlsym(0x7fd91c61a1c0, bind_engine): symbol not found
4402085376:error:2506C06A:DSO support routines:DSO_bind_func:could not bind to the requested symbol name:crypto/dso/dso_lib.c:186:
4402085376:error:260B6068:engine routines:dynamic_load:DSO failure:crypto/engine/eng_dyn.c:427:
4402085376:error:2606A074:engine routines:ENGINE_by_id:no such engine:crypto/engine/eng_list.c:334:id=gost
4402085376:error:260BC066:engine routines:int_engine_configure:engine configuration error:crypto/engine/eng_cnf.c:141:section=gost_section, name=default_algorithms, value=ALL
4402085376:error:0E07606D:configuration file routines:module_run:module initialization error:crypto/conf/conf_mod.c:177:module=engines, value=engine_section, retcode=-1 

There is no bind_engine symbol:

nm /usr/local/opt/[email protected]/lib/engines-1.1/gost.dylib | grep bind_engine

How to fix it?

[beldmit]

Could you please check that you didn't build openssl with -DOPENSSL_NO_DYNAMIC_ENGINE ?

[x87-va]

Could you please check that you didn't build openssl with -DOPENSSL_NO_DYNAMIC_ENGINE ?

Seems like there is no such option here: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/[email protected]

[beldmit]

Could you please add explicit shared option to the Configure arguments?

[x87-va]

Could you please add explicit shared option to the Configure arguments?

I've tried to build openssl with shared argument:

==> perl ./Configure --prefix=/usr/local/Cellar/[email protected]/1.1.1l --openssldir=/usr/local/etc/[email protected] no-ssl3 no-ssl3-method no-zlib shared darwin64-x86_64-cc enable-ec_nist

Then installed it and rebuilt gost engine. But it didn't fix the issue.

[beldmit]

Speaking frankly, I have no ideas. The MacOS tests run on regular basis during the CI, and the engine initialization code is here for ages. Could you check that you built the engine against the OpenSSL you built, not against the system one?

[x87-va]

Speaking frankly, I have no ideas. The MacOS tests run on regular basis during the CI, and the engine initialization code is here for ages. Could you check that you built the engine against the OpenSSL you built, not against the system one?

otool -L /usr/local/Cellar/[email protected]/1.1.1l/lib/engines-1.1/gost.1.1.dylib
/usr/local/Cellar/[email protected]/1.1.1l/lib/engines-1.1/gost.1.1.dylib:
	@rpath/gost.1.1.dylib (compatibility version 1.1.0, current version 1.1.0)
	/usr/local/opt/[email protected]/lib/libcrypto.1.1.dylib (compatibility version 1.1.0, current version 1.1.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1292.100.5)

[x87-va]

Maybe the issue related to compiler version? Is clang fully supported?

[beldmit]

I didn't come across any clang-related issues before.

[x87-va]

I had to modify this line https://github.com/gost-engine/engine/blob/openssl_1_1_1/CMakeLists.txt#L88 Because these variables were not resolved. Engine file was named bin/gost...dylib Maybe this helps.

[levitte]

This was solved on the master branch with #27. @beldmit, should I backport that? The above is exactly the sort of issue you get into when you treat what's to be a dynamically loadable module as a shared library with cmake.

[beldmit]

If you do it, it would be great. I don't understand the MacOs model here at all and we didn't get this issue with the commercial implementation...

[levitte]

Well, the Linux model is really not better, you just happen to cheat a lot :wink:

[levitte]

Essentially, a plugin is not a shared library and vice versa, conceptually speaking. But, on some platforms, this is just a naming difference, while on others, the difference is more tangible.

[levitte]

@x87-va, this is a quick hack that should probably produce what you want. Beware, though, that the tests will fail miserably, they aren't prepared for this...

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d86737a..74af03d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -265,9 +265,9 @@ add_library(gost_core STATIC ${GOST_LIB_SOURCE_FILES})
 set_target_properties(gost_core PROPERTIES POSITION_INDEPENDENT_CODE ON)
 target_link_libraries(gost_core PRIVATE OpenSSL::Crypto)
 
-add_library(gost_engine SHARED ${GOST_ENGINE_SOURCE_FILES})
+add_library(gost_engine MODULE ${GOST_ENGINE_SOURCE_FILES})
 set_target_properties(gost_engine PROPERTIES PREFIX "" OUTPUT_NAME "gost")
-set_target_properties(gost_engine PROPERTIES VERSION ${GOST_SOVERSION} SOVERSION ${GOST_SOVERSION})
+#set_target_properties(gost_engine PROPERTIES VERSION ${GOST_SOVERSION} SOVERSION ${GOST_SOVERSION})
 target_link_libraries(gost_engine PRIVATE gost_core)
 
 add_library(gost_engine_static STATIC ${GOST_ENGINE_SOURCE_FILES})

[x87-va]

@x87-va, this is a quick hack that should probably produce what you want. Beware, though, that the tests will fail miserably, they aren't prepared for this...

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d86737a..74af03d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -265,9 +265,9 @@ add_library(gost_core STATIC ${GOST_LIB_SOURCE_FILES})
 set_target_properties(gost_core PROPERTIES POSITION_INDEPENDENT_CODE ON)
 target_link_libraries(gost_core PRIVATE OpenSSL::Crypto)
 
-add_library(gost_engine SHARED ${GOST_ENGINE_SOURCE_FILES})
+add_library(gost_engine MODULE ${GOST_ENGINE_SOURCE_FILES})
 set_target_properties(gost_engine PROPERTIES PREFIX "" OUTPUT_NAME "gost")
-set_target_properties(gost_engine PROPERTIES VERSION ${GOST_SOVERSION} SOVERSION ${GOST_SOVERSION})
+#set_target_properties(gost_engine PROPERTIES VERSION ${GOST_SOVERSION} SOVERSION ${GOST_SOVERSION})
 target_link_libraries(gost_engine PRIVATE gost_core)
 
 add_library(gost_engine_static STATIC ${GOST_ENGINE_SOURCE_FILES})

Now I have build error:

[ 54%] Building C object CMakeFiles/test_keyexpimp.dir/test_keyexpimp.c.o
[ 56%] Linking C executable bin/test_keyexpimp
ld: can't link with bundle (MH_BUNDLE) only dylibs (MH_DYLIB) file 'bin/gost.so' for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [bin/test_keyexpimp] Error 1
make[1]: *** [CMakeFiles/test_keyexpimp.dir/all] Error 2
make: *** [all] Error 2

[levitte]

Yeah, I'll look through that, it didn't get right on Linux even, for reasons that currently escape me. Be back in a day or two

[levitte]

(this reminds me: I actually have access to a Mac since recently!)

[x87-va]

Are there any updates?