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/*
* Test dynamic loading of libmbed*
*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
*/
#include "mbedtls/build_info.h"
#include "mbedtls/platform.h"
#if defined(MBEDTLS_X509_CRT_PARSE_C)
#include "mbedtls/x509_crt.h"
#endif
#if defined(__APPLE__)
#define SO_SUFFIX ".dylib"
#else
#define SO_SUFFIX ".so"
#endif
#define CRYPTO_SO_FILENAME "libmbedcrypto" SO_SUFFIX
#define X509_SO_FILENAME "libmbedx509" SO_SUFFIX
#define TLS_SO_FILENAME "libmbedtls" SO_SUFFIX
#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)
{
#if defined(MBEDTLS_MD_C) || defined(MBEDTLS_SSL_TLS_C)
unsigned n;
#endif
#if defined(MBEDTLS_SSL_TLS_C)
void *tls_so = dlopen(TLS_SO_FILENAME, RTLD_NOW);
CHECK_DLERROR("dlopen", TLS_SO_FILENAME);
#pragma GCC diagnostic push
/* dlsym() returns an object pointer which is meant to be used as a
* function pointer. This has undefined behavior in standard C, so
* "gcc -std=c99 -pedantic" complains about it, but it is perfectly
* fine on platforms that have dlsym(). */
#pragma GCC diagnostic ignored "-Wpedantic"
const int *(*ssl_list_ciphersuites)(void) =
dlsym(tls_so, "mbedtls_ssl_list_ciphersuites");
#pragma GCC diagnostic pop
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("dlopen(%s): %u ciphersuites\n",
TLS_SO_FILENAME, 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("dlopen(%s): Allowed md mask: %08x\n",
X509_SO_FILENAME, (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);
#pragma GCC diagnostic push
/* dlsym() returns an object pointer which is meant to be used as a
* function pointer. This has undefined behavior in standard C, so
* "gcc -std=c99 -pedantic" complains about it, but it is perfectly
* fine on platforms that have dlsym(). */
#pragma GCC diagnostic ignored "-Wpedantic"
const int *(*md_list)(void) =
dlsym(crypto_so, "mbedtls_md_list");
#pragma GCC diagnostic pop
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("dlopen(%s): %u hashes\n",
CRYPTO_SO_FILENAME, n);
dlclose(crypto_so);
CHECK_DLERROR("dlclose", CRYPTO_SO_FILENAME);
#endif /* MBEDTLS_MD_C */
return 0;
}
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