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/*
* Copyright (c) 2014, Ford Motor Company
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the Ford Motor Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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 HOLDER 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 "security_manager/crypto_manager_impl.h"
#include <openssl/bio.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#include "security_manager/security_manager.h"
#include "utils/logger.h"
#include "utils/atomic.h"
#define TLS1_1_MINIMAL_VERSION 0x1000103fL
#define CONST_SSL_METHOD_MINIMAL_VERSION 0x00909000L
namespace security_manager {
CREATE_LOGGERPTR_GLOBAL(logger_, "CryptoManagerImpl")
uint32_t CryptoManagerImpl::instance_count_ = 0;
CryptoManagerImpl::CryptoManagerImpl()
: context_(NULL), mode_(CLIENT) {
}
bool CryptoManagerImpl::Init(Mode mode,
Protocol protocol,
const std::string &cert_filename,
const std::string &key_filename,
const std::string &ciphers_list,
bool verify_peer) {
if (atomic_post_inc(&instance_count_) == 0) {
SSL_load_error_strings();
ERR_load_BIO_strings();
OpenSSL_add_all_algorithms();
SSL_library_init();
}
mode_ = mode;
const bool is_server = (mode == SERVER);
#if OPENSSL_VERSION_NUMBER < CONST_SSL_METHOD_MINIMAL_VERSION
SSL_METHOD *method;
#else
const SSL_METHOD *method;
#endif
switch (protocol) {
case SSLv3:
method = is_server ?
SSLv3_server_method() :
SSLv3_client_method();
break;
case TLSv1:
method = is_server ?
TLSv1_server_method() :
TLSv1_client_method();
break;
case TLSv1_1:
#if OPENSSL_VERSION_NUMBER < TLS1_1_MINIMAL_VERSION
LOG4CXX_WARN(logger_,
"OpenSSL has no TLSv1.1 with version lower 1.0.1, set TLSv1.0");
method = is_server ?
TLSv1_server_method() :
TLSv1_client_method();
#else
method = is_server ?
TLSv1_1_server_method() :
TLSv1_1_client_method();
#endif
break;
case TLSv1_2:
#if OPENSSL_VERSION_NUMBER < TLS1_1_MINIMAL_VERSION
LOG4CXX_WARN(logger_,
"OpenSSL has no TLSv1.2 with version lower 1.0.1, set TLSv1.0");
method = is_server ?
TLSv1_server_method() :
TLSv1_client_method();
#else
method = is_server ?
TLSv1_2_server_method() :
TLSv1_2_client_method();
#endif
break;
default:
LOG4CXX_ERROR(logger_, "Unknown protocol: " << protocol);
return false;
}
context_ = SSL_CTX_new(method);
// Disable SSL2 as deprecated
SSL_CTX_set_options(context_, SSL_OP_NO_SSLv2);
if (cert_filename.empty()) {
LOG4CXX_WARN(logger_, "Empty certificate path");
} else {
LOG4CXX_INFO(logger_, "Certificate path: " << cert_filename);
if (!SSL_CTX_use_certificate_file(context_, cert_filename.c_str(),
SSL_FILETYPE_PEM)) {
LOG4CXX_ERROR(logger_, "Could not use certificate " << cert_filename);
return false;
}
}
if (key_filename.empty()) {
LOG4CXX_WARN(logger_, "Empty key path");
} else {
LOG4CXX_INFO(logger_, "Key path: " << key_filename);
if (!SSL_CTX_use_PrivateKey_file(context_, key_filename.c_str(),
SSL_FILETYPE_PEM)) {
LOG4CXX_ERROR(logger_, "Could not use key " << key_filename);
return false;
}
if (!SSL_CTX_check_private_key(context_)) {
LOG4CXX_ERROR(logger_, "Could not use certificate " << cert_filename);
return false;
}
}
if (ciphers_list.empty()) {
LOG4CXX_WARN(logger_, "Empty ciphers list");
} else {
LOG4CXX_INFO(logger_, "Cipher list: " << ciphers_list);
if (!SSL_CTX_set_cipher_list(context_, ciphers_list.c_str())) {
LOG4CXX_ERROR(logger_, "Could not set cipher list: " << ciphers_list);
return false;
}
}
// TODO(EZamakhov): add loading SSL_VERIFY_FAIL_IF_NO_PEER_CERT from INI
const int verify_mode = verify_peer
? SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT
: SSL_VERIFY_NONE;
SSL_CTX_set_verify(context_, verify_mode, NULL);
return true;
}
void CryptoManagerImpl::Finish() {
SSL_CTX_free(context_);
if (atomic_post_dec(&instance_count_) == 1) {
EVP_cleanup();
ERR_free_strings();
}
}
SSLContext* CryptoManagerImpl::CreateSSLContext() {
if (context_ == NULL) {
return NULL;
}
SSL *conn = SSL_new(context_);
if (conn == NULL)
return NULL;
if (mode_ == SERVER) {
SSL_set_accept_state(conn);
} else {
SSL_set_connect_state(conn);
}
return new SSLContextImpl(conn, mode_);
}
void CryptoManagerImpl::ReleaseSSLContext(SSLContext *context) {
delete context;
}
std::string CryptoManagerImpl::LastError() const {
if (!context_) {
return std::string("Initialization is not completed");
}
const char *reason = ERR_reason_error_string(ERR_get_error());
return std::string(reason ? reason : "");
}
} // namespace security_manager
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