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openssl/test/shlibloadtest.c

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/*
* Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <openssl/opensslv.h>
#include <openssl/ssl.h>
#include <openssl/ossl_typ.h>
#include "crypto/dso_conf.h"
typedef void DSO;
typedef const SSL_METHOD * (*TLS_method_t)(void);
typedef SSL_CTX * (*SSL_CTX_new_t)(const SSL_METHOD *meth);
typedef void (*SSL_CTX_free_t)(SSL_CTX *);
typedef int (*OPENSSL_init_crypto_t)(uint64_t, void *);
typedef int (*OPENSSL_atexit_t)(void (*handler)(void));
typedef unsigned long (*ERR_get_error_t)(void);
typedef unsigned long (*OpenSSL_version_num_t)(void);
typedef DSO * (*DSO_dsobyaddr_t)(void (*addr)(void), int flags);
typedef int (*DSO_free_t)(DSO *dso);
typedef enum test_types_en {
CRYPTO_FIRST,
SSL_FIRST,
JUST_CRYPTO,
DSO_REFTEST,
NO_ATEXIT
} TEST_TYPE;
static TEST_TYPE test_type;
static const char *path_crypto;
static const char *path_ssl;
static const char *path_atexit;
#ifdef DSO_DLFCN
# include <dlfcn.h>
# define SHLIB_INIT NULL
typedef void *SHLIB;
typedef void *SHLIB_SYM;
static int shlib_load(const char *filename, SHLIB *lib)
{
int dl_flags = (RTLD_GLOBAL|RTLD_LAZY);
#ifdef _AIX
if (filename[strlen(filename) - 1] == ')')
dl_flags |= RTLD_MEMBER;
#endif
*lib = dlopen(filename, dl_flags);
return *lib == NULL ? 0 : 1;
}
static int shlib_sym(SHLIB lib, const char *symname, SHLIB_SYM *sym)
{
*sym = dlsym(lib, symname);
return *sym != NULL;
}
static int shlib_close(SHLIB lib)
{
return dlclose(lib) != 0 ? 0 : 1;
}
#endif
#ifdef DSO_WIN32
# include <windows.h>
# define SHLIB_INIT 0
typedef HINSTANCE SHLIB;
typedef void *SHLIB_SYM;
static int shlib_load(const char *filename, SHLIB *lib)
{
*lib = LoadLibraryA(filename);
return *lib == NULL ? 0 : 1;
}
static int shlib_sym(SHLIB lib, const char *symname, SHLIB_SYM *sym)
{
*sym = (SHLIB_SYM)GetProcAddress(lib, symname);
return *sym != NULL;
}
static int shlib_close(SHLIB lib)
{
return FreeLibrary(lib) == 0 ? 0 : 1;
}
#endif
#if defined(DSO_DLFCN) || defined(DSO_WIN32)
static int atexit_handler_done = 0;
static void atexit_handler(void)
{
FILE *atexit_file = fopen(path_atexit, "w");
if (atexit_file == NULL)
return;
fprintf(atexit_file, "atexit() run\n");
fclose(atexit_file);
atexit_handler_done++;
}
static int test_lib(void)
{
SHLIB ssllib = SHLIB_INIT;
SHLIB cryptolib = SHLIB_INIT;
SSL_CTX *ctx;
union {
void (*func)(void);
SHLIB_SYM sym;
} symbols[3];
TLS_method_t myTLS_method;
SSL_CTX_new_t mySSL_CTX_new;
SSL_CTX_free_t mySSL_CTX_free;
ERR_get_error_t myERR_get_error;
OpenSSL_version_num_t myOpenSSL_version_num;
OPENSSL_atexit_t myOPENSSL_atexit;
int result = 0;
switch (test_type) {
case JUST_CRYPTO:
case DSO_REFTEST:
case NO_ATEXIT:
case CRYPTO_FIRST:
if (!shlib_load(path_crypto, &cryptolib)) {
fprintf(stderr, "Failed to load libcrypto\n");
goto end;
}
if (test_type != CRYPTO_FIRST)
break;
/* Fall through */
case SSL_FIRST:
if (!shlib_load(path_ssl, &ssllib)) {
fprintf(stderr, "Failed to load libssl\n");
goto end;
}
if (test_type != SSL_FIRST)
break;
if (!shlib_load(path_crypto, &cryptolib)) {
fprintf(stderr, "Failed to load libcrypto\n");
goto end;
}
break;
}
if (test_type == NO_ATEXIT) {
OPENSSL_init_crypto_t myOPENSSL_init_crypto;
if (!shlib_sym(cryptolib, "OPENSSL_init_crypto", &symbols[0].sym)) {
fprintf(stderr, "Failed to load OPENSSL_init_crypto symbol\n");
goto end;
}
myOPENSSL_init_crypto = (OPENSSL_init_crypto_t)symbols[0].func;
if (!myOPENSSL_init_crypto(OPENSSL_INIT_NO_ATEXIT, NULL)) {
fprintf(stderr, "Failed to initialise libcrypto\n");
goto end;
}
}
if (test_type != JUST_CRYPTO
&& test_type != DSO_REFTEST
&& test_type != NO_ATEXIT) {
if (!shlib_sym(ssllib, "TLS_method", &symbols[0].sym)
|| !shlib_sym(ssllib, "SSL_CTX_new", &symbols[1].sym)
|| !shlib_sym(ssllib, "SSL_CTX_free", &symbols[2].sym)) {
fprintf(stderr, "Failed to load libssl symbols\n");
goto end;
}
myTLS_method = (TLS_method_t)symbols[0].func;
mySSL_CTX_new = (SSL_CTX_new_t)symbols[1].func;
mySSL_CTX_free = (SSL_CTX_free_t)symbols[2].func;
ctx = mySSL_CTX_new(myTLS_method());
if (ctx == NULL) {
fprintf(stderr, "Failed to create SSL_CTX\n");
goto end;
}
mySSL_CTX_free(ctx);
}
if (!shlib_sym(cryptolib, "ERR_get_error", &symbols[0].sym)
|| !shlib_sym(cryptolib, "OpenSSL_version_num", &symbols[1].sym)
|| !shlib_sym(cryptolib, "OPENSSL_atexit", &symbols[2].sym)) {
fprintf(stderr, "Failed to load libcrypto symbols\n");
goto end;
}
myERR_get_error = (ERR_get_error_t)symbols[0].func;
if (myERR_get_error() != 0) {
fprintf(stderr, "Unexpected ERR_get_error() response\n");
goto end;
}
myOpenSSL_version_num = (OpenSSL_version_num_t)symbols[1].func;
if (myOpenSSL_version_num() != OPENSSL_VERSION_NUMBER) {
fprintf(stderr, "Invalid library version number\n");
goto end;
}
myOPENSSL_atexit = (OPENSSL_atexit_t)symbols[2].func;
if (!myOPENSSL_atexit(atexit_handler)) {
fprintf(stderr, "Failed to register atexit handler\n");
goto end;
}
if (test_type == DSO_REFTEST) {
# ifdef DSO_DLFCN
DSO_dsobyaddr_t myDSO_dsobyaddr;
DSO_free_t myDSO_free;
/*
* This is resembling the code used in ossl_init_base() and
* OPENSSL_atexit() to block unloading the library after dlclose().
* We are not testing this on Windows, because it is done there in a
* completely different way. Especially as a call to DSO_dsobyaddr()
* will always return an error, because DSO_pathbyaddr() is not
* implemented there.
*/
if (!shlib_sym(cryptolib, "DSO_dsobyaddr", &symbols[0].sym)
|| !shlib_sym(cryptolib, "DSO_free", &symbols[1].sym)) {
fprintf(stderr, "Unable to load DSO symbols\n");
goto end;
}
myDSO_dsobyaddr = (DSO_dsobyaddr_t)symbols[0].func;
myDSO_free = (DSO_free_t)symbols[1].func;
{
DSO *hndl;
/* use known symbol from crypto module */
hndl = myDSO_dsobyaddr((void (*)(void))myERR_get_error, 0);
if (hndl == NULL) {
fprintf(stderr, "DSO_dsobyaddr() failed\n");
goto end;
}
myDSO_free(hndl);
}
# endif /* DSO_DLFCN */
}
if (!shlib_close(cryptolib)) {
fprintf(stderr, "Failed to close libcrypto\n");
goto end;
}
if (test_type == CRYPTO_FIRST || test_type == SSL_FIRST) {
if (!shlib_close(ssllib)) {
fprintf(stderr, "Failed to close libssl\n");
goto end;
}
}
# if defined(OPENSSL_NO_PINSHARED) \
&& defined(__GLIBC__) \
&& defined(__GLIBC_PREREQ) \
&& defined(OPENSSL_SYS_LINUX)
# if __GLIBC_PREREQ(2, 3)
/*
* If we didn't pin the so then we are hopefully on a platform that supports
* running atexit() on so unload. If not we might crash. We know this is
* true on linux since glibc 2.2.3
*/
if (test_type != NO_ATEXIT && atexit_handler_done != 1) {
fprintf(stderr, "atexit() handler did not run\n");
goto end;
}
# endif
# endif
result = 1;
end:
return result;
}
#endif
/*
* shlibloadtest should not use the normal test framework because we don't want
* it to link against libcrypto (which the framework uses). The point of the
* test is to check dynamic loading and unloading of libcrypto/libssl.
*/
int main(int argc, char *argv[])
{
const char *p;
if (argc != 5) {
fprintf(stderr, "Incorrect number of arguments\n");
return 1;
}
p = argv[1];
if (strcmp(p, "-crypto_first") == 0) {
test_type = CRYPTO_FIRST;
} else if (strcmp(p, "-ssl_first") == 0) {
test_type = SSL_FIRST;
} else if (strcmp(p, "-just_crypto") == 0) {
test_type = JUST_CRYPTO;
} else if (strcmp(p, "-dso_ref") == 0) {
test_type = DSO_REFTEST;
} else if (strcmp(p, "-no_atexit") == 0) {
test_type = NO_ATEXIT;
} else {
fprintf(stderr, "Unrecognised argument\n");
return 1;
}
path_crypto = argv[2];
path_ssl = argv[3];
path_atexit = argv[4];
if (path_crypto == NULL || path_ssl == NULL) {
fprintf(stderr, "Invalid libcrypto/libssl path\n");
return 1;
}
#if defined(DSO_DLFCN) || defined(DSO_WIN32)
if (!test_lib())
return 1;
#endif
return 0;
}
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