chrome/browser/password_manager/password_store_x.cc

   1 // Copyright (c) 2012 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/password_manager/password_store_x.h"
   6
   7 #include <algorithm>
   8 #include <map>
   9 #include <vector>
  10
  11 #include "base/bind.h"
  12 #include "base/logging.h"
  13 #include "base/prefs/pref_service.h"
  14 #include "base/stl_util.h"
  15 #include "chrome/browser/chrome_notification_types.h"
  16 #include "components/password_manager/core/browser/password_store_change.h"
  17 #include "components/password_manager/core/common/password_manager_pref_names.h"
  18 #include "components/pref_registry/pref_registry_syncable.h"
  19 #include "content/public/browser/browser_thread.h"
  20 #include "content/public/browser/notification_service.h"
  21
  22 using autofill::PasswordForm;
  23 using content::BrowserThread;
  24 using password_manager::PasswordStoreChange;
  25 using password_manager::PasswordStoreChangeList;
  26 using password_manager::PasswordStoreDefault;
  27
  28 namespace {
  29
  30 bool AddLoginToBackend(const scoped_ptr<PasswordStoreX::NativeBackend>& backend,
  31                        const PasswordForm& form,
  32                        PasswordStoreChangeList* changes) {
  33   *changes = backend->AddLogin(form);
  34   return (!changes->empty() &&
  35           changes->back().type() == PasswordStoreChange::ADD);
  36 }
  37
  38 }  // namespace
  39
  40 PasswordStoreX::PasswordStoreX(
  41     scoped_refptr<base::SingleThreadTaskRunner> main_thread_runner,
  42     scoped_refptr<base::SingleThreadTaskRunner> db_thread_runner,
  43     scoped_ptr<password_manager::LoginDatabase> login_db,
  44     NativeBackend* backend)
  45     : PasswordStoreDefault(main_thread_runner,
  46                            db_thread_runner,
  47                            login_db.Pass()),
  48       backend_(backend),
  49       migration_checked_(!backend),
  50       allow_fallback_(false) {
  51 }
  52
  53 PasswordStoreX::~PasswordStoreX() {}
  54
  55 PasswordStoreChangeList PasswordStoreX::AddLoginImpl(const PasswordForm& form) {
  56   CheckMigration();
  57   PasswordStoreChangeList changes;
  58   if (use_native_backend() && AddLoginToBackend(backend_, form, &changes)) {
  59     allow_fallback_ = false;
  60   } else if (allow_default_store()) {
  61     changes = PasswordStoreDefault::AddLoginImpl(form);
  62   }
  63   return changes;
  64 }
  65
  66 PasswordStoreChangeList PasswordStoreX::UpdateLoginImpl(
  67     const PasswordForm& form) {
  68   CheckMigration();
  69   PasswordStoreChangeList changes;
  70   if (use_native_backend() && backend_->UpdateLogin(form, &changes)) {
  71     allow_fallback_ = false;
  72   } else if (allow_default_store()) {
  73     changes = PasswordStoreDefault::UpdateLoginImpl(form);
  74   }
  75   return changes;
  76 }
  77
  78 PasswordStoreChangeList PasswordStoreX::RemoveLoginImpl(
  79     const PasswordForm& form) {
  80   CheckMigration();
  81   PasswordStoreChangeList changes;
  82   if (use_native_backend() && backend_->RemoveLogin(form)) {
  83     changes.push_back(PasswordStoreChange(PasswordStoreChange::REMOVE, form));
  84     allow_fallback_ = false;
  85   } else if (allow_default_store()) {
  86     changes = PasswordStoreDefault::RemoveLoginImpl(form);
  87   }
  88   return changes;
  89 }
  90
  91 PasswordStoreChangeList PasswordStoreX::RemoveLoginsCreatedBetweenImpl(
  92     base::Time delete_begin,
  93     base::Time delete_end) {
  94   CheckMigration();
  95   PasswordStoreChangeList changes;
  96   if (use_native_backend() &&
  97       backend_->RemoveLoginsCreatedBetween(
  98           delete_begin, delete_end, &changes)) {
  99     LogStatsForBulkDeletion(changes.size());
 100     allow_fallback_ = false;
 101   } else if (allow_default_store()) {
 102     changes = PasswordStoreDefault::RemoveLoginsCreatedBetweenImpl(delete_begin,
 103                                                                    delete_end);
 104   }
 105   return changes;
 106 }
 107
 108 PasswordStoreChangeList PasswordStoreX::RemoveLoginsSyncedBetweenImpl(
 109     base::Time delete_begin,
 110     base::Time delete_end) {
 111   CheckMigration();
 112   PasswordStoreChangeList changes;
 113   if (use_native_backend() &&
 114       backend_->RemoveLoginsSyncedBetween(delete_begin, delete_end, &changes)) {
 115     LogStatsForBulkDeletionDuringRollback(changes.size());
 116     allow_fallback_ = false;
 117   } else if (allow_default_store()) {
 118     changes = PasswordStoreDefault::RemoveLoginsSyncedBetweenImpl(delete_begin,
 119                                                                   delete_end);
 120   }
 121   return changes;
 122 }
 123
 124 namespace {
 125
 126 struct LoginLessThan {
 127   bool operator()(const PasswordForm* a, const PasswordForm* b) {
 128     return a->origin < b->origin;
 129   }
 130 };
 131
 132 // Sorts |list| by origin, like the ORDER BY clause in login_database.cc.
 133 void SortLoginsByOrigin(std::vector<autofill::PasswordForm*>* list) {
 134   std::sort(list->begin(), list->end(), LoginLessThan());
 135 }
 136
 137 }  // anonymous namespace
 138
 139 ScopedVector<autofill::PasswordForm> PasswordStoreX::FillMatchingLogins(
 140     const autofill::PasswordForm& form,
 141     AuthorizationPromptPolicy prompt_policy) {
 142   CheckMigration();
 143   ScopedVector<autofill::PasswordForm> matched_forms;
 144   if (use_native_backend() && backend_->GetLogins(form, &matched_forms)) {
 145     SortLoginsByOrigin(&matched_forms.get());
 146     // The native backend may succeed and return no data even while locked, if
 147     // the query did not match anything stored. So we continue to allow fallback
 148     // until we perform a write operation, or until a read returns actual data.
 149     if (!matched_forms.empty())
 150       allow_fallback_ = false;
 151     return matched_forms.Pass();
 152   }
 153   if (allow_default_store())
 154     return PasswordStoreDefault::FillMatchingLogins(form, prompt_policy);
 155   return ScopedVector<autofill::PasswordForm>();
 156 }
 157
 158 bool PasswordStoreX::FillAutofillableLogins(
 159     ScopedVector<autofill::PasswordForm>* forms) {
 160   CheckMigration();
 161   if (use_native_backend() && backend_->GetAutofillableLogins(forms)) {
 162     SortLoginsByOrigin(&forms->get());
 163     // See GetLoginsImpl() for why we disallow fallback conditionally here.
 164     if (!forms->empty())
 165       allow_fallback_ = false;
 166     return true;
 167   }
 168   if (allow_default_store())
 169     return PasswordStoreDefault::FillAutofillableLogins(forms);
 170   return false;
 171 }
 172
 173 bool PasswordStoreX::FillBlacklistLogins(
 174     ScopedVector<autofill::PasswordForm>* forms) {
 175   CheckMigration();
 176   if (use_native_backend() && backend_->GetBlacklistLogins(forms)) {
 177     // See GetLoginsImpl() for why we disallow fallback conditionally here.
 178     SortLoginsByOrigin(&forms->get());
 179     if (!forms->empty())
 180       allow_fallback_ = false;
 181     return true;
 182   }
 183   if (allow_default_store())
 184     return PasswordStoreDefault::FillBlacklistLogins(forms);
 185   return false;
 186 }
 187
 188 void PasswordStoreX::CheckMigration() {
 189   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::DB));
 190   if (migration_checked_ || !backend_.get())
 191     return;
 192   migration_checked_ = true;
 193   ssize_t migrated = MigrateLogins();
 194   if (migrated > 0) {
 195     VLOG(1) << "Migrated " << migrated << " passwords to native store.";
 196   } else if (migrated == 0) {
 197     // As long as we are able to migrate some passwords, we know the native
 198     // store is working. But if there is nothing to migrate, the "migration"
 199     // can succeed even when the native store would fail. In this case we
 200     // allow a later fallback to the default store. Once any later operation
 201     // succeeds on the native store, we will no longer allow fallback.
 202     allow_fallback_ = true;
 203   } else {
 204     LOG(WARNING) << "Native password store migration failed! " <<
 205                  "Falling back on default (unencrypted) store.";
 206     backend_.reset();
 207   }
 208 }
 209
 210 bool PasswordStoreX::allow_default_store() {
 211   if (allow_fallback_) {
 212     LOG(WARNING) << "Native password store failed! " <<
 213                  "Falling back on default (unencrypted) store.";
 214     backend_.reset();
 215     // Don't warn again. We'll use the default store because backend_ is NULL.
 216     allow_fallback_ = false;
 217   }
 218   return !backend_.get();
 219 }
 220
 221 ssize_t PasswordStoreX::MigrateLogins() {
 222   DCHECK(backend_.get());
 223   ScopedVector<autofill::PasswordForm> forms;
 224   ScopedVector<autofill::PasswordForm> blacklist_forms;
 225   bool ok = PasswordStoreDefault::FillAutofillableLogins(&forms) &&
 226             PasswordStoreDefault::FillBlacklistLogins(&blacklist_forms);
 227   forms.reserve(forms.size() + blacklist_forms.size());
 228   forms.insert(forms.end(), blacklist_forms.begin(), blacklist_forms.end());
 229   blacklist_forms.weak_clear();
 230   if (ok) {
 231     // We add all the passwords (and blacklist entries) to the native backend
 232     // before attempting to remove any from the login database, to make sure we
 233     // don't somehow end up with some of the passwords in one store and some in
 234     // another. We'll always have at least one intact store this way.
 235     for (size_t i = 0; i < forms.size(); ++i) {
 236       PasswordStoreChangeList changes;
 237       if (!AddLoginToBackend(backend_, *forms[i], &changes)) {
 238         ok = false;
 239         break;
 240       }
 241     }
 242     if (ok) {
 243       for (size_t i = 0; i < forms.size(); ++i) {
 244         // If even one of these calls to RemoveLoginImpl() succeeds, then we
 245         // should prefer the native backend to the now-incomplete login
 246         // database. Thus we want to return a success status even in the case
 247         // where some fail. The only real problem with this is that we might
 248         // leave passwords in the login database and never come back to clean
 249         // them out if any of these calls do fail.
 250         PasswordStoreDefault::RemoveLoginImpl(*forms[i]);
 251       }
 252       // Finally, delete the database file itself. We remove the passwords from
 253       // it before deleting the file just in case there is some problem deleting
 254       // the file (e.g. directory is not writable, but file is), which would
 255       // otherwise cause passwords to re-migrate next (or maybe every) time.
 256       DeleteAndRecreateDatabaseFile();
 257     }
 258   }
 259   ssize_t result = ok ? forms.size() : -1;
 260   return result;
 261 }