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/*-
* Copyright (c) 2021 Ribose Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "backend_version.h"
#include "logging.h"
#if defined(CRYPTO_BACKEND_BOTAN)
#include <botan/version.h>
#elif defined(CRYPTO_BACKEND_OPENSSL)
#include <openssl/opensslv.h>
#include <openssl/crypto.h>
#include "ossl_common.h"
#if defined(CRYPTO_BACKEND_OPENSSL3)
#include <openssl/provider.h>
#endif
#include <string.h>
#include "config.h"
#ifndef RNP_USE_STD_REGEX
#include <regex.h>
#else
#include <regex>
#endif
#endif
#include <cassert>
namespace rnp {
const char *
backend_string()
{
#if defined(CRYPTO_BACKEND_BOTAN)
return "Botan";
#elif defined(CRYPTO_BACKEND_OPENSSL)
return "OpenSSL";
#else
#error "Unknown backend"
#endif
}
const char *
backend_version()
{
#if defined(CRYPTO_BACKEND_BOTAN)
return Botan::short_version_cstr();
#elif defined(CRYPTO_BACKEND_OPENSSL)
/* Use regexp to retrieve version (second word) from version string
* like "OpenSSL 1.1.1l 24 Aug 2021"
* */
static char version[32] = {};
if (version[0]) {
return version;
}
const char *reg = "OpenSSL (([0-9]+\\.[0-9]+\\.[0-9]+)[a-z]*(-[a-z0-9]+)*) ";
#ifndef RNP_USE_STD_REGEX
static regex_t r;
regmatch_t matches[5];
const char * ver = OpenSSL_version(OPENSSL_VERSION);
if (!strlen(version)) {
if (regcomp(&r, reg, REG_EXTENDED) != 0) {
RNP_LOG("failed to compile regexp");
return "unknown";
}
}
int res = regexec(&r, ver, 5, matches, 0);
if (res != 0) {
RNP_LOG("regexec() failed on %s: %d", ver, res);
return "unknown";
}
assert(sizeof(version) > matches[1].rm_eo - matches[1].rm_so);
memcpy(version, ver + matches[1].rm_so, matches[1].rm_eo - matches[1].rm_so);
version[matches[1].rm_eo - matches[1].rm_so] = '\0';
#else
static std::regex re(reg, std::regex_constants::extended);
std::smatch result;
std::string ver = OpenSSL_version(OPENSSL_VERSION);
if (!std::regex_search(ver, result, re)) {
RNP_LOG("std::regex_search failed on \"%s\"", ver.c_str());
return "unknown";
}
assert(sizeof(version) > result[1].str().size());
strncpy(version, result[1].str().c_str(), sizeof(version) - 1);
#endif
return version;
#else
#error "Unknown backend"
#endif
}
#if defined(CRYPTO_BACKEND_OPENSSL3)
#if defined(ENABLE_IDEA) || defined(ENABLE_CAST5) || defined(ENABLE_BLOWFISH) || \
(defined(ENABLE_RIPEMD160) && OPENSSL_VERSION_NUMBER < 0x30000070L)
#if !defined(CRYPTO_BACKEND_OPENSSL3_LEGACY)
#error "OpenSSL doesn't have legacy provider, however one of the features enables it's load."
#endif
#define OPENSSL_LOAD_LEGACY
#endif
typedef struct openssl3_state {
#if defined(OPENSSL_LOAD_LEGACY)
OSSL_PROVIDER *legacy;
#endif
OSSL_PROVIDER *def;
} openssl3_state;
bool
backend_init(void **param)
{
if (!param) {
return false;
}
*param = NULL;
openssl3_state *state = (openssl3_state *) calloc(1, sizeof(openssl3_state));
if (!state) {
RNP_LOG("Allocation failure.");
return false;
}
/* Load default crypto provider */
state->def = OSSL_PROVIDER_load(NULL, "default");
if (!state->def) {
RNP_LOG("Failed to load default crypto provider: %s", ossl_latest_err());
free(state);
return false;
}
/* Load legacy crypto provider if needed */
#if defined(OPENSSL_LOAD_LEGACY)
state->legacy = OSSL_PROVIDER_load(NULL, "legacy");
if (!state->legacy) {
RNP_LOG("Failed to load legacy crypto provider: %s", ossl_latest_err());
OSSL_PROVIDER_unload(state->def);
free(state);
return false;
}
#endif
*param = state;
return true;
}
void
backend_finish(void *param)
{
if (!param) {
return;
}
openssl3_state *state = (openssl3_state *) param;
OSSL_PROVIDER_unload(state->def);
#if defined(OPENSSL_LOAD_LEGACY)
OSSL_PROVIDER_unload(state->legacy);
#endif
free(state);
}
#else
bool
backend_init(void **param)
{
return true;
}
void
backend_finish(void *param)
{
// Do nothing
}
#endif
} // namespace rnp
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