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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 COMPONENTS_USER_PREFS_TRACKED_PREF_HASH_STORE_IMPL_H_ | 5 #ifndef COMPONENTS_USER_PREFS_TRACKED_PREF_HASH_STORE_IMPL_H_ |
| 6 #define COMPONENTS_USER_PREFS_TRACKED_PREF_HASH_STORE_IMPL_H_ | 6 #define COMPONENTS_USER_PREFS_TRACKED_PREF_HASH_STORE_IMPL_H_ |
| 7 | 7 |
| 8 #include "base/compiler_specific.h" | 8 #include "base/compiler_specific.h" |
| 9 #include "base/macros.h" | 9 #include "base/macros.h" |
| 10 #include "components/user_prefs/tracked/pref_hash_calculator.h" | 10 #include "components/user_prefs/tracked/pref_hash_calculator.h" |
| 11 #include "components/user_prefs/tracked/pref_hash_store.h" | 11 #include "components/user_prefs/tracked/pref_hash_store.h" |
| 12 | 12 |
| 13 // Implements PrefHashStoreImpl by storing preference hashes in a | 13 // Implements PrefHashStoreImpl by storing preference hashes in a |
| 14 // HashStoreContents. | 14 // HashStoreContents. |
| 15 class PrefHashStoreImpl : public PrefHashStore { | 15 class PrefHashStoreImpl : public PrefHashStore { |
| 16 public: | 16 public: |
| 17 enum StoreVersion { | 17 enum StoreVersion { |
| 18 // No hashes have been stored in this PrefHashStore yet. | 18 // No hashes have been stored in this PrefHashStore yet. |
| 19 VERSION_UNINITIALIZED = 0, | 19 VERSION_UNINITIALIZED = 0, |
| 20 // The hashes in this PrefHashStore were stored before the introduction | 20 // The hashes in this PrefHashStore were stored before the introduction |
| 21 // of a version number and should be re-initialized. | 21 // of a version number and should be re-initialized. |
| 22 VERSION_PRE_MIGRATION = 1, | 22 VERSION_PRE_MIGRATION = 1, |
| 23 // The hashes in this PrefHashStore were stored using the latest algorithm. | 23 // The hashes in this PrefHashStore were stored using the latest algorithm. |
| 24 VERSION_LATEST = 2, | 24 VERSION_LATEST = 2, |
| 25 }; | 25 }; |
| 26 | 26 |
| 27 // Constructs a PrefHashStoreImpl that calculates hashes using | 27 // Constructs a PrefHashStoreImpl that calculates hashes using |
| 28 // |seed| and |device_id| and stores them in |contents|. | 28 // |seed| and |legacy_device_id| and stores them in |contents|. |
| 29 // | 29 // |
| 30 // The same |seed| and |device_id| must be used to load and validate | 30 // The same |seed| and |legacy_device_id| must be used to load and validate |
| 31 // previously stored hashes in |contents|. | 31 // previously stored hashes in |contents|. |
| 32 PrefHashStoreImpl(const std::string& seed, | 32 PrefHashStoreImpl(const std::string& seed, |
| 33 const std::string& device_id, | 33 const std::string& legacy_device_id, |
| 34 bool use_super_mac); | 34 bool use_super_mac); |
| 35 | 35 |
| 36 ~PrefHashStoreImpl() override; | 36 ~PrefHashStoreImpl() override; |
| 37 | 37 |
| 38 // Clears the contents of this PrefHashStore. |IsInitialized()| will return | 38 // Clears the contents of this PrefHashStore. |IsInitialized()| will return |
| 39 // false after this call. | 39 // false after this call. |
| 40 void Reset(); | 40 void Reset(); |
| 41 | 41 |
| 42 // PrefHashStore implementation. | 42 // PrefHashStore implementation. |
| 43 std::unique_ptr<PrefHashStoreTransaction> BeginTransaction( | 43 std::unique_ptr<PrefHashStoreTransaction> BeginTransaction( |
| 44 HashStoreContents* storage) override; | 44 HashStoreContents* storage) override; |
| 45 | 45 |
| 46 std::string ComputeMac(const std::string& path, | 46 std::string ComputeMac(const std::string& path, |
| 47 const base::Value* new_value) override; | 47 const base::Value* new_value) override; |
| 48 std::unique_ptr<base::DictionaryValue> ComputeSplitMacs( | 48 std::unique_ptr<base::DictionaryValue> ComputeSplitMacs( |
| 49 const std::string& path, | 49 const std::string& path, |
| 50 const base::DictionaryValue* split_values) override; | 50 const base::DictionaryValue* split_values) override; |
| 51 | 51 |
| 52 private: | 52 private: |
| 53 class PrefHashStoreTransactionImpl; | 53 class PrefHashStoreTransactionImpl; |
| 54 | 54 |
| 55 const PrefHashCalculator pref_hash_calculator_; | 55 const PrefHashCalculator pref_hash_calculator_; |
| 56 bool use_super_mac_; | 56 bool use_super_mac_; |
| 57 | 57 |
| 58 DISALLOW_COPY_AND_ASSIGN(PrefHashStoreImpl); | 58 DISALLOW_COPY_AND_ASSIGN(PrefHashStoreImpl); |
| 59 }; | 59 }; |
| 60 | 60 |
| 61 #endif // COMPONENTS_USER_PREFS_TRACKED_PREF_HASH_STORE_IMPL_H_ | 61 #endif // COMPONENTS_USER_PREFS_TRACKED_PREF_HASH_STORE_IMPL_H_ |
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