1 // Copyright 2013 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.
5 #ifndef CHROME_BROWSER_PREFS_PREF_HASH_CALCULATOR_H_
6 #define CHROME_BROWSER_PREFS_PREF_HASH_CALCULATOR_H_
10 #include "base/basictypes.h"
16 // Calculates and validates preference value hashes.
17 class PrefHashCalculator {
19 enum ValidationResult {
22 // Valid under a deprecated but as secure algorithm.
26 // Constructs a PrefHashCalculator using |seed| and |device_id|. The same
27 // parameters must be used in order to successfully validate generated hashes.
28 // |device_id| may be empty.
29 PrefHashCalculator(const std::string& seed, const std::string& device_id);
31 ~PrefHashCalculator();
33 // Calculates a hash value for the supplied preference |path| and |value|.
34 // |value| may be null if the preference has no value.
35 std::string Calculate(const std::string& path, const base::Value* value)
38 // Validates the provided preference hash using current and legacy hashing
40 ValidationResult Validate(const std::string& path,
41 const base::Value* value,
42 const std::string& hash) const;
45 const std::string seed_;
46 const std::string device_id_;
47 const std::string legacy_device_id_;
49 DISALLOW_COPY_AND_ASSIGN(PrefHashCalculator);
52 #endif // CHROME_BROWSER_PREFS_PREF_HASH_CALCULATOR_H_