[Password manager IOS upsteaming] Upstreaming login database

components/password_manager/core/browser/login_database.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_LOGIN_DATABASE_H_
 #define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_LOGIN_DATABASE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_vector.h"
 #include "base/pickle.h"
 #include "base/strings/string16.h"
 #include "components/password_manager/core/browser/password_store.h"
 #include "components/password_manager/core/browser/password_store_change.h"
 #include "components/password_manager/core/browser/psl_matching_helper.h"
 #include "components/password_manager/core/browser/statistics_table.h"
 #include "sql/connection.h"
 #include "sql/meta_table.h"
 
+#if defined(OS_IOS)
+#include "base/gtest_prod_util.h"
+#endif
+
 namespace password_manager {
 
 extern const int kCurrentVersionNumber;
 extern const int kCompatibleVersionNumber;
 
 // Interface to the database storage of login information, intended as a helper
 // for PasswordStore on platforms that need internal storage of some or all of
 // the login information.
 class LoginDatabase {
  public:
@@ skipping 70 matching lines @@
   bool GetBlacklistLogins(ScopedVector<autofill::PasswordForm>* forms) const
       WARN_UNUSED_RESULT;
 
   // Deletes the login database file on disk, and creates a new, empty database.
   // This can be used after migrating passwords to some other store, to ensure
   // that SQLite doesn't leave fragments of passwords in the database file.
   // Returns true on success; otherwise, whether the file was deleted and
   // whether further use of this login database will succeed is unspecified.
   bool DeleteAndRecreateDatabaseFile();
 
+  // Returns the encrypted password value for the specified |form|.  Returns an
+  // empty string if the row for this |form| is not found.
+  std::string GetEncryptedPassword(const autofill::PasswordForm& form) const;
+
   StatisticsTable& stats_table() { return stats_table_; }
 
   void set_clear_password_values(bool val) { clear_password_values_ = val; }
 
  private:
+#if defined(OS_IOS)
+  friend class LoginDatabaseIOSTest;
+  FRIEND_TEST_ALL_PREFIXES(LoginDatabaseIOSTest, KeychainStorage);
+
+  // On iOS, removes the keychain item that is used to store the
+  // encrypted password for the supplied |form|.
+  void DeleteEncryptedPassword(const autofill::PasswordForm& form);
+#endif
+
   // Result values for encryption/decryption actions.
   enum EncryptionResult {
     // Success.
     ENCRYPTION_RESULT_SUCCESS,
     // Failure for a specific item (e.g., the encrypted value was manually
     // moved from another machine, and can't be decrypted on this machine).
     // This is presumed to be a permanent failure.
     ENCRYPTION_RESULT_ITEM_FAILURE,
     // A service-level failure (e.g., on a platform using a keyring, the keyring
     // is temporarily unavailable).
@@ skipping 51 matching lines @@
   // This is a temporary measure for migration the Keychain on Mac.
   // crbug.com/466638
   bool clear_password_values_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginDatabase);
 };
 
 }  // namespace password_manager
 
 #endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_LOGIN_DATABASE_H_