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, &changes)) {
  83     allow_fallback_ = false;
  84   } else if (allow_default_store()) {
  85     changes = PasswordStoreDefault::RemoveLoginImpl(form);
  86   }
  87   return changes;
  88 }
  89
  90 PasswordStoreChangeList PasswordStoreX::RemoveLoginsCreatedBetweenImpl(
  91     base::Time delete_begin,
  92     base::Time delete_end) {
  93   CheckMigration();
  94   PasswordStoreChangeList changes;
  95   if (use_native_backend() &&
  96       backend_->RemoveLoginsCreatedBetween(
  97           delete_begin, delete_end, &changes)) {
  98     LogStatsForBulkDeletion(changes.size());
  99     allow_fallback_ = false;
 100   } else if (allow_default_store()) {
 101     changes = PasswordStoreDefault::RemoveLoginsCreatedBetweenImpl(delete_begin,
 102                                                                    delete_end);
 103   }
 104   return changes;
 105 }
 106
 107 PasswordStoreChangeList PasswordStoreX::RemoveLoginsSyncedBetweenImpl(
 108     base::Time delete_begin,
 109     base::Time delete_end) {
 110   CheckMigration();
 111   PasswordStoreChangeList changes;
 112   if (use_native_backend() &&
 113       backend_->RemoveLoginsSyncedBetween(delete_begin, delete_end, &changes)) {
 114     LogStatsForBulkDeletionDuringRollback(changes.size());
 115     allow_fallback_ = false;
 116   } else if (allow_default_store()) {
 117     changes = PasswordStoreDefault::RemoveLoginsSyncedBetweenImpl(delete_begin,
 118                                                                   delete_end);
 119   }
 120   return changes;
 121 }
 122
 123 namespace {
 124
 125 struct LoginLessThan {
 126   bool operator()(const PasswordForm* a, const PasswordForm* b) {
 127     return a->origin < b->origin;
 128   }
 129 };
 130
 131 // Sorts |list| by origin, like the ORDER BY clause in login_database.cc.
 132 void SortLoginsByOrigin(std::vector<autofill::PasswordForm*>* list) {
 133   std::sort(list->begin(), list->end(), LoginLessThan());
 134 }
 135
 136 }  // anonymous namespace
 137
 138 ScopedVector<autofill::PasswordForm> PasswordStoreX::FillMatchingLogins(
 139     const autofill::PasswordForm& form,
 140     AuthorizationPromptPolicy prompt_policy) {
 141   CheckMigration();
 142   ScopedVector<autofill::PasswordForm> matched_forms;
 143   if (use_native_backend() && backend_->GetLogins(form, &matched_forms)) {
 144     SortLoginsByOrigin(&matched_forms.get());
 145     // The native backend may succeed and return no data even while locked, if
 146     // the query did not match anything stored. So we continue to allow fallback
 147     // until we perform a write operation, or until a read returns actual data.
 148     if (!matched_forms.empty())
 149       allow_fallback_ = false;
 150     return matched_forms.Pass();
 151   }
 152   if (allow_default_store())
 153     return PasswordStoreDefault::FillMatchingLogins(form, prompt_policy);
 154   return ScopedVector<autofill::PasswordForm>();
 155 }
 156
 157 bool PasswordStoreX::FillAutofillableLogins(
 158     ScopedVector<autofill::PasswordForm>* forms) {
 159   CheckMigration();
 160   if (use_native_backend() && backend_->GetAutofillableLogins(forms)) {
 161     SortLoginsByOrigin(&forms->get());
 162     // See GetLoginsImpl() for why we disallow fallback conditionally here.
 163     if (!forms->empty())
 164       allow_fallback_ = false;
 165     return true;
 166   }
 167   if (allow_default_store())
 168     return PasswordStoreDefault::FillAutofillableLogins(forms);
 169   return false;
 170 }
 171
 172 bool PasswordStoreX::FillBlacklistLogins(
 173     ScopedVector<autofill::PasswordForm>* forms) {
 174   CheckMigration();
 175   if (use_native_backend() && backend_->GetBlacklistLogins(forms)) {
 176     // See GetLoginsImpl() for why we disallow fallback conditionally here.
 177     SortLoginsByOrigin(&forms->get());
 178     if (!forms->empty())
 179       allow_fallback_ = false;
 180     return true;
 181   }
 182   if (allow_default_store())
 183     return PasswordStoreDefault::FillBlacklistLogins(forms);
 184   return false;
 185 }
 186
 187 void PasswordStoreX::CheckMigration() {
 188   DCHECK_CURRENTLY_ON(BrowserThread::DB);
 189   if (migration_checked_ || !backend_.get())
 190     return;
 191   migration_checked_ = true;
 192   ssize_t migrated = MigrateLogins();
 193   if (migrated > 0) {
 194     VLOG(1) << "Migrated " << migrated << " passwords to native store.";
 195   } else if (migrated == 0) {
 196     // As long as we are able to migrate some passwords, we know the native
 197     // store is working. But if there is nothing to migrate, the "migration"
 198     // can succeed even when the native store would fail. In this case we
 199     // allow a later fallback to the default store. Once any later operation
 200     // succeeds on the native store, we will no longer allow fallback.
 201     allow_fallback_ = true;
 202   } else {
 203     LOG(WARNING) << "Native password store migration failed! " <<
 204                  "Falling back on default (unencrypted) store.";
 205     backend_.reset();
 206   }
 207 }
 208
 209 bool PasswordStoreX::allow_default_store() {
 210   if (allow_fallback_) {
 211     LOG(WARNING) << "Native password store failed! " <<
 212                  "Falling back on default (unencrypted) store.";
 213     backend_.reset();
 214     // Don't warn again. We'll use the default store because backend_ is NULL.
 215     allow_fallback_ = false;
 216   }
 217   return !backend_.get();
 218 }
 219
 220 ssize_t PasswordStoreX::MigrateLogins() {
 221   DCHECK(backend_.get());
 222   ScopedVector<autofill::PasswordForm> forms;
 223   ScopedVector<autofill::PasswordForm> blacklist_forms;
 224   bool ok = PasswordStoreDefault::FillAutofillableLogins(&forms) &&
 225             PasswordStoreDefault::FillBlacklistLogins(&blacklist_forms);
 226   forms.reserve(forms.size() + blacklist_forms.size());
 227   forms.insert(forms.end(), blacklist_forms.begin(), blacklist_forms.end());
 228   blacklist_forms.weak_clear();
 229   if (ok) {
 230     // We add all the passwords (and blacklist entries) to the native backend
 231     // before attempting to remove any from the login database, to make sure we
 232     // don't somehow end up with some of the passwords in one store and some in
 233     // another. We'll always have at least one intact store this way.
 234     for (size_t i = 0; i < forms.size(); ++i) {
 235       PasswordStoreChangeList changes;
 236       if (!AddLoginToBackend(backend_, *forms[i], &changes)) {
 237         ok = false;
 238         break;
 239       }
 240     }
 241     if (ok) {
 242       for (size_t i = 0; i < forms.size(); ++i) {
 243         // If even one of these calls to RemoveLoginImpl() succeeds, then we
 244         // should prefer the native backend to the now-incomplete login
 245         // database. Thus we want to return a success status even in the case
 246         // where some fail. The only real problem with this is that we might
 247         // leave passwords in the login database and never come back to clean
 248         // them out if any of these calls do fail.
 249         PasswordStoreDefault::RemoveLoginImpl(*forms[i]);
 250       }
 251       // Finally, delete the database file itself. We remove the passwords from
 252       // it before deleting the file just in case there is some problem deleting
 253       // the file (e.g. directory is not writable, but file is), which would
 254       // otherwise cause passwords to re-migrate next (or maybe every) time.
 255       DeleteAndRecreateDatabaseFile();
 256     }
 257   }
 258   ssize_t result = ok ? forms.size() : -1;
 259   return result;
 260 }