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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CHROME_BROWSER_PREFS_TRACKED_PREF_HASH_CALCULATOR_H_ | 5 #ifndef COMPONENTS_USER_PREFS_TRACKED_PREF_HASH_CALCULATOR_H_ |
6 #define CHROME_BROWSER_PREFS_TRACKED_PREF_HASH_CALCULATOR_H_ | 6 #define COMPONENTS_USER_PREFS_TRACKED_PREF_HASH_CALCULATOR_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 | 9 |
10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
11 | 11 |
12 namespace base { | 12 namespace base { |
13 class Value; | 13 class Value; |
14 } // namespace base | 14 } // namespace base |
15 | 15 |
16 // Calculates and validates preference value hashes. | 16 // Calculates and validates preference value hashes. |
17 class PrefHashCalculator { | 17 class PrefHashCalculator { |
18 public: | 18 public: |
19 enum ValidationResult { | 19 enum ValidationResult { |
20 INVALID, | 20 INVALID, |
21 VALID, | 21 VALID, |
22 // Valid under a deprecated but as secure algorithm. | 22 // Valid under a deprecated but as secure algorithm. |
23 VALID_SECURE_LEGACY, | 23 VALID_SECURE_LEGACY, |
24 }; | 24 }; |
25 | 25 |
26 // Constructs a PrefHashCalculator using |seed| and |device_id|. The same | 26 // Constructs a PrefHashCalculator using |seed| and |device_id|. The same |
27 // parameters must be used in order to successfully validate generated hashes. | 27 // parameters must be used in order to successfully validate generated hashes. |
28 // |device_id| may be empty. | 28 // |device_id| may be empty. |
29 PrefHashCalculator(const std::string& seed, const std::string& device_id); | 29 PrefHashCalculator(const std::string& seed, const std::string& device_id); |
30 | 30 |
31 ~PrefHashCalculator(); | 31 ~PrefHashCalculator(); |
32 | 32 |
33 // Calculates a hash value for the supplied preference |path| and |value|. | 33 // Calculates a hash value for the supplied preference |path| and |value|. |
34 // |value| may be null if the preference has no value. | 34 // |value| may be null if the preference has no value. |
35 std::string Calculate(const std::string& path, const base::Value* value) | 35 std::string Calculate(const std::string& path, |
36 const; | 36 const base::Value* value) const; |
37 | 37 |
38 // Validates the provided preference hash using current and legacy hashing | 38 // Validates the provided preference hash using current and legacy hashing |
39 // algorithms. | 39 // algorithms. |
40 ValidationResult Validate(const std::string& path, | 40 ValidationResult Validate(const std::string& path, |
41 const base::Value* value, | 41 const base::Value* value, |
42 const std::string& hash) const; | 42 const std::string& hash) const; |
43 | 43 |
44 private: | 44 private: |
45 const std::string seed_; | 45 const std::string seed_; |
46 const std::string device_id_; | 46 const std::string device_id_; |
47 const std::string legacy_device_id_; | 47 const std::string legacy_device_id_; |
48 | 48 |
49 DISALLOW_COPY_AND_ASSIGN(PrefHashCalculator); | 49 DISALLOW_COPY_AND_ASSIGN(PrefHashCalculator); |
50 }; | 50 }; |
51 | 51 |
52 #endif // CHROME_BROWSER_PREFS_TRACKED_PREF_HASH_CALCULATOR_H_ | 52 #endif // COMPONENTS_USER_PREFS_TRACKED_PREF_HASH_CALCULATOR_H_ |
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