Move crypto files out of base, to a top level directory.

base/openssl_util.cc

-// Copyright (c) 2011 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 "base/openssl_util.h"
-
-#include <openssl/err.h>
-#include <openssl/ssl.h>
-
-#include "base/logging.h"
-#include "base/memory/scoped_vector.h"
-#include "base/memory/singleton.h"
-#include "base/string_piece.h"
-#include "base/synchronization/lock.h"
-
-namespace base {
-
-namespace {
-
-unsigned long CurrentThreadId() {
-  return static_cast<unsigned long>(PlatformThread::CurrentId());
-}
-
-// Singleton for initializing and cleaning up the OpenSSL library.
-class OpenSSLInitSingleton {
- public:
-  static OpenSSLInitSingleton* GetInstance() {
-    // We allow the SSL environment to leak for multiple reasons:
-    //   -  it is used from a non-joinable worker thread that is not stopped on
-    //      shutdown, hence may still be using OpenSSL library after the AtExit
-    //      runner has completed.
-    //   -  There are other OpenSSL related singletons (e.g. the client socket
-    //      context) who's cleanup depends on the global environment here, but
-    //      we can't control the order the AtExit handlers will run in so
-    //      allowing the global environment to leak at least ensures it is
-    //      available for those other singletons to reliably cleanup.
-    return Singleton<OpenSSLInitSingleton,
-                     LeakySingletonTraits<OpenSSLInitSingleton> >::get();
-  }
- private:
-  friend struct DefaultSingletonTraits<OpenSSLInitSingleton>;
-  OpenSSLInitSingleton() {
-    SSL_load_error_strings();
-    SSL_library_init();
-    OpenSSL_add_all_algorithms();
-    int num_locks = CRYPTO_num_locks();
-    locks_.reserve(num_locks);
-    for (int i = 0; i < num_locks; ++i)
-      locks_.push_back(new base::Lock());
-    CRYPTO_set_locking_callback(LockingCallback);
-    CRYPTO_set_id_callback(CurrentThreadId);
-  }
-
-  ~OpenSSLInitSingleton() {
-    CRYPTO_set_locking_callback(NULL);
-    EVP_cleanup();
-    ERR_free_strings();
-  }
-
-  static void LockingCallback(int mode, int n, const char* file, int line) {
-    OpenSSLInitSingleton::GetInstance()->OnLockingCallback(mode, n, file, line);
-  }
-
-  void 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();
-  }
-
-  // These locks are used and managed by OpenSSL via LockingCallback().
-  ScopedVector<base::Lock> locks_;
-
-  DISALLOW_COPY_AND_ASSIGN(OpenSSLInitSingleton);
-};
-
-// Callback routine for OpenSSL to print error messages. |str| is a
-// NULL-terminated string of length |len| containing diagnostic information
-// such as the library, function and reason for the error, the file and line
-// where the error originated, plus potentially any context-specific
-// information about the error. |context| contains a pointer to user-supplied
-// data, which is currently unused.
-// If this callback returns a value <= 0, OpenSSL will stop processing the
-// error queue and return, otherwise it will continue calling this function
-// until all errors have been removed from the queue.
-int OpenSSLErrorCallback(const char* str, size_t len, void* context) {
-  DVLOG(1) << "\t" << StringPiece(str, len);
-  return 1;
-}
-
-}  // namespace
-
-void EnsureOpenSSLInit() {
-  (void)OpenSSLInitSingleton::GetInstance();
-}
-
-void ClearOpenSSLERRStack(const tracked_objects::Location& location) {
-  if (logging::DEBUG_MODE && VLOG_IS_ON(1)) {
-    int error_num = ERR_peek_error();
-    if (error_num == 0)
-      return;
-
-    std::string message;
-    location.Write(true, true, &message);
-    DVLOG(1) << "OpenSSL ERR_get_error stack from " << message;
-    ERR_print_errors_cb(&OpenSSLErrorCallback, NULL);
-  } else {
-    ERR_clear_error();
-  }
-}
-
-}  // namespace base