New test app for dynamic loading of libmbed* with dlopen
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/programs/.gitignore b/programs/.gitignore
index 5d3c5bd..d402607 100644
--- a/programs/.gitignore
+++ b/programs/.gitignore
@@ -54,6 +54,7 @@
test/benchmark
test/cpp_dummy_build
test/cpp_dummy_build.cpp
+test/dlopen
test/ecp-bench
test/query_compile_time_config
test/selftest
diff --git a/programs/Makefile b/programs/Makefile
index 550887a..2a3fd6f 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -114,6 +114,10 @@
APPS += ssl/ssl_pthread_server$(EXEXT)
endif
+ifdef SHARED
+APPS += test/dlopen
+endif
+
ifdef TEST_CPP
APPS += test/cpp_dummy_build$(EXEXT)
endif
@@ -318,6 +322,15 @@
echo " CXX test/cpp_dummy_build.cpp"
$(CXX) $(LOCAL_CXXFLAGS) $(CXXFLAGS) test/cpp_dummy_build.cpp $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
+ifdef SHARED
+test/dlopen$(EXEXT): test/dlopen.c $(DEP)
+ echo " CC test/dlopen.c"
+# Do not link any test objects (that would bring in a static dependency on
+# libmbedcrypto at least). Do not link with libmbed* (that would defeat the
+# purpose of testing dynamic loading).
+ $(CC) $(LOCAL_CFLAGS) $(CFLAGS) test/dlopen.c $(LDFLAGS) -ldl -o $@
+endif
+
test/query_config.o: test/query_config.c test/query_config.h $(DEP)
echo " CC test/query_config.c"
$(CC) $(LOCAL_CFLAGS) $(CFLAGS) -c test/query_config.c -o $@
@@ -379,6 +392,7 @@
rm -f $(APPS)
-rm -f ssl/ssl_pthread_server$(EXEXT)
-rm -f test/cpp_dummy_build.cpp test/cpp_dummy_build$(EXEXT)
+ -rm -f test/dlopen$(EXEXT)
else
if exist *.o del /Q /F *.o
if exist *.exe del /Q /F *.exe
diff --git a/programs/test/CMakeLists.txt b/programs/test/CMakeLists.txt
index 04ec7fc..6233de4 100644
--- a/programs/test/CMakeLists.txt
+++ b/programs/test/CMakeLists.txt
@@ -35,6 +35,12 @@
target_link_libraries(cpp_dummy_build ${mbedcrypto_target})
endif()
+if(USE_SHARED_MBEDTLS_LIBRARY)
+ add_executable(dlopen "dlopen.c")
+ target_include_directories(dlopen PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../../include)
+ target_link_libraries(dlopen "-ldl")
+endif()
+
foreach(exe IN LISTS executables_libs executables_mbedcrypto)
set(extra_sources "")
if(exe STREQUAL "query_compile_time_config")
diff --git a/programs/test/dlopen.c b/programs/test/dlopen.c
new file mode 100644
index 0000000..e770c39
--- /dev/null
+++ b/programs/test/dlopen.c
@@ -0,0 +1,102 @@
+/*
+ * Test dynamic loading of libmbed*
+ *
+ * Copyright The Mbed TLS Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbedtls/config.h"
+
+#include "mbedtls/platform.h"
+#if !defined(MBEDTLS_PLATFORM_C)
+#include <stdio.h>
+#include <stdlib.h>
+#define mbedtls_fprintf fprintf
+#define mbedtls_printf printf
+#define mbedtls_exit exit
+#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
+#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
+#endif
+
+#if defined(MBEDTLS_X509_CRT_PARSE_C)
+#include "mbedtls/x509_crt.h"
+#endif
+
+#define CRYPTO_SO_FILENAME "libmbedcrypto.so"
+#define X509_SO_FILENAME "libmbedx509.so"
+#define TLS_SO_FILENAME "libmbedtls.so"
+
+#include <dlfcn.h>
+
+#define CHECK_DLERROR( function, argument ) \
+ do \
+ { \
+ char *CHECK_DLERROR_error = dlerror ( ); \
+ if( CHECK_DLERROR_error != NULL ) \
+ { \
+ fprintf( stderr, "Dynamic loading error for %s(%s): %s\n", \
+ function, argument, CHECK_DLERROR_error ); \
+ mbedtls_exit( MBEDTLS_EXIT_FAILURE ); \
+ } \
+ } \
+ while( 0 )
+
+int main( void )
+{
+ unsigned n;
+
+#if defined(MBEDTLS_SSL_TLS_C)
+ void *tls_so = dlopen( TLS_SO_FILENAME, RTLD_NOW );
+ CHECK_DLERROR( "dlopen", TLS_SO_FILENAME );
+ const int *( *ssl_list_ciphersuites )( void ) =
+ dlsym( tls_so, "mbedtls_ssl_list_ciphersuites" );
+ CHECK_DLERROR( "dlsym", "mbedtls_ssl_list_ciphersuites" );
+ const int *ciphersuites = ssl_list_ciphersuites( );
+ for( n = 0; ciphersuites[n] != 0; n++ )
+ /* nothing to do, we're just counting */;
+ mbedtls_printf( "%u ciphersuites\n", n );
+ dlclose( tls_so );
+ CHECK_DLERROR( "dlclose", TLS_SO_FILENAME );
+#endif /* MBEDTLS_SSL_TLS_C */
+
+#if defined(MBEDTLS_X509_CRT_PARSE_C)
+ void *x509_so = dlopen( X509_SO_FILENAME, RTLD_NOW );
+ CHECK_DLERROR( "dlopen", X509_SO_FILENAME );
+ const mbedtls_x509_crt_profile *profile =
+ dlsym( x509_so, "mbedtls_x509_crt_profile_default" );
+ CHECK_DLERROR( "dlsym", "mbedtls_x509_crt_profile_default" );
+ mbedtls_printf( "Allowed md mask: %08x\n",
+ (unsigned) profile->allowed_mds );
+ dlclose( x509_so );
+ CHECK_DLERROR( "dlclose", X509_SO_FILENAME );
+#endif /* MBEDTLS_X509_CRT_PARSE_C */
+
+#if defined(MBEDTLS_MD_C)
+ void *crypto_so = dlopen( CRYPTO_SO_FILENAME, RTLD_NOW );
+ CHECK_DLERROR( "dlopen", CRYPTO_SO_FILENAME );
+ const int *( *md_list )( void ) =
+ dlsym( crypto_so, "mbedtls_md_list" );
+ CHECK_DLERROR( "dlsym", "mbedtls_md_list" );
+ const int *mds = md_list( );
+ for( n = 0; mds[n] != 0; n++ )
+ /* nothing to do, we're just counting */;
+ mbedtls_printf( "%u hashes\n", n );
+ dlclose( crypto_so );
+ CHECK_DLERROR( "dlclose", CRYPTO_SO_FILENAME );
+#endif /* MBEDTLS_MD_C */
+
+ return( 0 );
+}
+