Make Encryptor a component. Used by //chrome and (soon) //components/webdata.

chrome/browser/password_manager/encryptor_password_mac.mm

-// Copyright (c) 2012 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 "chrome/browser/password_manager/encryptor_password_mac.h"
-
-#import <Security/Security.h>
-
-#include "base/base64.h"
-#include "base/mac/mac_logging.h"
-#include "base/rand_util.h"
-#include "crypto/apple_keychain.h"
-#include "ui/base/l10n/l10n_util.h"
-
-using crypto::AppleKeychain;
-
-namespace {
-
-// Generates a random password and adds it to the Keychain.  The added password
-// is returned from the function.  If an error occurs, an empty password is
-// returned.
-std::string AddRandomPasswordToKeychain(const AppleKeychain& keychain,
-                                        const std::string& service_name,
-                                        const std::string& account_name) {
-  // Generate a password with 128 bits of randomness.
-  const int kBytes = 128 / 8;
-  std::string password;
-  base::Base64Encode(base::RandBytesAsString(kBytes), &password);
-  void* password_data =
-      const_cast<void*>(static_cast<const void*>(password.data()));
-
-  OSStatus error = keychain.AddGenericPassword(NULL,
-                                               service_name.size(),
-                                               service_name.data(),
-                                               account_name.size(),
-                                               account_name.data(),
-                                               password.size(),
-                                               password_data,
-                                               NULL);
-
-  if (error != noErr) {
-    OSSTATUS_DLOG(ERROR, error) << "Keychain add failed";
-    return std::string();
-  }
-
-  return password;
-}
-
-}  // namespace
-
-std::string EncryptorPassword::GetEncryptorPassword() const {
-  // These two strings ARE indeed user facing.  But they are used to access
-  // the encryption keyword.  So as to not lose encrypted data when system
-  // locale changes we DO NOT LOCALIZE.
-  const std::string service_name = "Chrome Safe Storage";
-  const std::string account_name = "Chrome";
-
-  UInt32 password_length = 0;
-  void* password_data = NULL;
-  OSStatus error = keychain_.FindGenericPassword(NULL,
-                                                 service_name.size(),
-                                                 service_name.data(),
-                                                 account_name.size(),
-                                                 account_name.data(),
-                                                 &password_length,
-                                                 &password_data,
-                                                 NULL);
-
-  if (error == noErr) {
-    std::string password =
-        std::string(static_cast<char*>(password_data), password_length);
-    keychain_.ItemFreeContent(NULL, password_data);
-    return password;
-  } else if (error == errSecItemNotFound) {
-    return AddRandomPasswordToKeychain(keychain_, service_name, account_name);
-  } else {
-    OSSTATUS_DLOG(ERROR, error) << "Keychain lookup failed";
-    return std::string();
-  }
-}