chrome/browser/chromeos/login/easy_unlock/easy_unlock_remove_keys_operation.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/chromeos/login/easy_unlock/easy_unlock_remove_keys_operation.h"
   6
   7 #include "base/bind.h"
   8 #include "chrome/browser/chromeos/login/easy_unlock/easy_unlock_key_manager.h"
   9 #include "chromeos/cryptohome/homedir_methods.h"
  10 #include "chromeos/cryptohome/system_salt_getter.h"
  11 #include "google_apis/gaia/gaia_auth_util.h"
  12
  13 namespace chromeos {
  14
  15 EasyUnlockRemoveKeysOperation::EasyUnlockRemoveKeysOperation(
  16     const UserContext& user_context,
  17     size_t start_index,
  18     const RemoveKeysCallback& callback)
  19     : user_context_(user_context),
  20       callback_(callback),
  21       key_index_(start_index),
  22       weak_ptr_factory_(this) {
  23   // Must have the secret and callback.
  24   DCHECK(!user_context_.GetKey()->GetSecret().empty());
  25   DCHECK(!callback_.is_null());
  26 }
  27
  28 EasyUnlockRemoveKeysOperation::~EasyUnlockRemoveKeysOperation() {
  29 }
  30
  31 void EasyUnlockRemoveKeysOperation::Start() {
  32   if (user_context_.GetKey()->GetKeyType() == Key::KEY_TYPE_PASSWORD_PLAIN) {
  33     SystemSaltGetter::Get()->GetSystemSalt(
  34         base::Bind(&EasyUnlockRemoveKeysOperation::OnGetSystemSalt,
  35                    weak_ptr_factory_.GetWeakPtr()));
  36     return;
  37   }
  38
  39   RemoveKey();
  40 }
  41
  42 void EasyUnlockRemoveKeysOperation::OnGetSystemSalt(
  43     const std::string& system_salt) {
  44   user_context_.GetKey()->Transform(Key::KEY_TYPE_SALTED_SHA256_TOP_HALF,
  45                                     system_salt);
  46   RemoveKey();
  47 }
  48
  49 void EasyUnlockRemoveKeysOperation::RemoveKey() {
  50   std::string canonicalized =
  51       gaia::CanonicalizeEmail(user_context_.GetUserID());
  52   cryptohome::Identification id(canonicalized);
  53   const Key* const auth_key = user_context_.GetKey();
  54   cryptohome::Authorization auth(auth_key->GetSecret(), auth_key->GetLabel());
  55
  56   // TODO(xiyuan): Use ListKeyEx and delete by label instead of by index.
  57   cryptohome::HomedirMethods::GetInstance()->RemoveKeyEx(
  58       id,
  59       auth,
  60       EasyUnlockKeyManager::GetKeyLabel(key_index_),
  61       base::Bind(&EasyUnlockRemoveKeysOperation::OnKeyRemoved,
  62                  weak_ptr_factory_.GetWeakPtr()));
  63 }
  64
  65 void EasyUnlockRemoveKeysOperation::OnKeyRemoved(
  66     bool success,
  67     cryptohome::MountError return_code) {
  68   if (success) {
  69     ++key_index_;
  70     RemoveKey();
  71     return;
  72   }
  73
  74   // MOUNT_ERROR_KEY_FAILURE is considered as success. Other error codes are
  75   // treated as failures.
  76   if (return_code == cryptohome::MOUNT_ERROR_KEY_FAILURE) {
  77     callback_.Run(true);
  78   } else {
  79     LOG(ERROR) << "Easy unlock remove keys operation failed, code="
  80                << return_code;
  81     callback_.Run(false);
  82   }
  83 }
  84
  85 }  // namespace chromeos