15d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// Copyright 2013 The Chromium Authors. All rights reserved. 25d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// found in the LICENSE file. 45d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 55d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#ifndef CHROME_BROWSER_PREFS_PREF_HASH_CALCULATOR_H_ 65d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#define CHROME_BROWSER_PREFS_PREF_HASH_CALCULATOR_H_ 75d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 85d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include <string> 95d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 105d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "base/basictypes.h" 115d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 125d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)namespace base { 135d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)class Value; 145d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} // namespace base 155d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 165d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// Calculates and validates preference value hashes. 175d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)class PrefHashCalculator { 185d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) public: 195d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) enum ValidationResult { 205d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) INVALID, 215d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) VALID, 22a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Valid under a deprecated but as secure algorithm. 23a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) VALID_SECURE_LEGACY, 245d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) }; 255d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 265d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // Constructs a PrefHashCalculator using |seed| and |device_id|. The same 275d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // parameters must be used in order to successfully validate generated hashes. 285d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // |device_id| may be empty. 295d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) PrefHashCalculator(const std::string& seed, const std::string& device_id); 305d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 31a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) ~PrefHashCalculator(); 32a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 335d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // Calculates a hash value for the supplied preference |path| and |value|. 345d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // |value| may be null if the preference has no value. 355d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) std::string Calculate(const std::string& path, const base::Value* value) 365d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) const; 375d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 385d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // Validates the provided preference hash using current and legacy hashing 395d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) // algorithms. 405d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) ValidationResult Validate(const std::string& path, 415d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) const base::Value* value, 425d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) const std::string& hash) const; 435d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 445d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) private: 45a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) const std::string seed_; 46a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) const std::string device_id_; 475f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) const std::string legacy_device_id_; 485d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 495d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(PrefHashCalculator); 505d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)}; 515d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 525d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#endif // CHROME_BROWSER_PREFS_PREF_HASH_CALCULATOR_H_ 53