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/*
* Copyright 2019 Google Inc.
* 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
*
* https://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 "crypto/openssl_init.h"
#if !defined(OPENSSL_IS_BORINGSSL)
#include <pthread.h>
#include <mutex> // NOLINT(build/c++11): only using std::call_once, not mutex.
#include "glog/logging.h"
#include "crypto/openssl.inc"
#endif
namespace private_join_and_compute {
#if !defined(OPENSSL_IS_BORINGSSL)
namespace {
void CryptoNewThreadID(CRYPTO_THREADID* tid);
void CryptoLockingCallback(int mode, int n, const char* file, int line);
class OpenSSLInit {
public:
OpenSSLInit() : mutexes(CRYPTO_num_locks()) {
for (int i = 0; i < CRYPTO_num_locks(); ++i) {
pthread_mutex_init(&(mutexes[i]), nullptr);
}
}
void LoadErrStrings() {
ERR_load_BN_strings();
ERR_load_BUF_strings();
ERR_load_CRYPTO_strings();
ERR_load_EC_strings();
ERR_load_ERR_strings();
ERR_load_EVP_strings();
ERR_load_RAND_strings();
}
void InitLocking() {
CRYPTO_THREADID_set_callback(CryptoNewThreadID);
CRYPTO_set_locking_callback(CryptoLockingCallback);
}
~OpenSSLInit() {
CRYPTO_set_locking_callback(nullptr);
for (int i = 0; i < CRYPTO_num_locks(); ++i) {
pthread_mutex_destroy(&(mutexes[i]));
}
ERR_free_strings();
}
std::vector<pthread_mutex_t> mutexes;
};
static std::once_flag init_flag;
static OpenSSLInit openssl_init;
void CryptoNewThreadID(CRYPTO_THREADID* tid) {
#if defined(OS_NACL) // pthread_t is a pointer type in native client.
CRYPTO_THREADID_set_pointer(tid, pthread_self());
#else
CRYPTO_THREADID_set_numeric(tid, static_cast<uint64_t>(pthread_self()));
#endif
}
// See crypto/threads/mmtest.c for usage in OpenSSL library.
void CryptoLockingCallback(int mode, int n, const char* file, int line) {
CHECK_GE(n, 0);
pthread_mutex_t* mutex = &(openssl_init.mutexes[n]);
if (mode & CRYPTO_LOCK) {
pthread_mutex_lock(mutex);
} else {
pthread_mutex_unlock(mutex);
}
}
static void OpenSSLInitHelper() {
openssl_init.LoadErrStrings();
openssl_init.InitLocking();
}
} // namespace
#endif
void OpenSSLInit() {
#if !defined(OPENSSL_IS_BORINGSSL)
std::call_once(init_flag, OpenSSLInitHelper);
#endif
}
} // namespace private_join_and_compute
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