Refactor EnsureOpenSSLInit and openssl_util into base

net/base/openssl_util.cc

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "net/base/openssl_util.h"
-
-#include <openssl/err.h>
-
-#include "base/logging.h"
-#include "base/platform_thread.h"
-
-namespace net {
-
-namespace {
-
-// We do certificate verification after handshake, so we disable the default
-// by registering a no-op verify function.
-int NoOpVerifyCallback(X509_STORE_CTX*, void *) {
-  DVLOG(3) << "skipping cert verify";
-  return 1;
-}
-
-unsigned long CurrentThreadId() {
-  return static_cast<unsigned long>(PlatformThread::CurrentId());
-}
-
-SSL_CTX* CreateSSL_CTX() {
-  SSL_load_error_strings();
-  SSL_library_init();
-  OpenSSL_add_all_algorithms();
-  return SSL_CTX_new(SSLv23_client_method());
-}
-
-}  // namespace
-
-OpenSSLInitSingleton::OpenSSLInitSingleton()
-    : ssl_ctx_(CreateSSL_CTX()),
-      store_(X509_STORE_new()) {
-  CHECK(ssl_ctx_.get());
-  CHECK(store_.get());
-
-  SSL_CTX_set_cert_verify_callback(ssl_ctx_.get(), NoOpVerifyCallback, NULL);
-  X509_STORE_set_default_paths(store_.get());
-  // TODO(bulach): Enable CRL (see X509_STORE_set_flags(X509_V_FLAG_CRL_CHECK)).
-  int num_locks = CRYPTO_num_locks();
-  for (int i = 0; i < num_locks; ++i)
-    locks_.push_back(new Lock());
-  CRYPTO_set_locking_callback(LockingCallback);
-  CRYPTO_set_id_callback(CurrentThreadId);
-}
-
-OpenSSLInitSingleton::~OpenSSLInitSingleton() {
-  CRYPTO_set_locking_callback(NULL);
-  EVP_cleanup();
-  ERR_free_strings();
-}
-
-OpenSSLInitSingleton* GetOpenSSLInitSingleton() {
-  return Singleton<OpenSSLInitSingleton>::get();
-}
-
-void EnsureOpenSSLInit() {
-  Singleton<OpenSSLInitSingleton>::get();
-}
-
-// static
-void OpenSSLInitSingleton::LockingCallback(int mode,
-                                            int n,
-                                            const char* file,
-                                            int line) {
-  GetOpenSSLInitSingleton()->OnLockingCallback(mode, n, file, line);
-}
-
-void OpenSSLInitSingleton::OnLockingCallback(int mode,
-                                              int n,
-                                              const char* file,
-                                              int line) {
-  CHECK_LT(static_cast<size_t>(n), locks_.size());
-  if (mode & CRYPTO_LOCK)
-    locks_[n]->Acquire();
-  else
-    locks_[n]->Release();
-}
-
-}  // namespace net
-