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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 #include "chrome/browser/metrics/variations/variations_seed_store.h" | 5 #include "chrome/browser/metrics/variations/variations_seed_store.h" |
| 6 | 6 |
| 7 #include "base/base64.h" | 7 #include "base/base64.h" |
| 8 #include "base/metrics/histogram.h" | 8 #include "base/metrics/histogram.h" |
| 9 #include "base/prefs/pref_registry_simple.h" | 9 #include "base/prefs/pref_registry_simple.h" |
| 10 #include "base/prefs/pref_service.h" | 10 #include "base/prefs/pref_service.h" |
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| 112 | 112 |
| 113 } // namespace | 113 } // namespace |
| 114 | 114 |
| 115 VariationsSeedStore::VariationsSeedStore(PrefService* local_state) | 115 VariationsSeedStore::VariationsSeedStore(PrefService* local_state) |
| 116 : local_state_(local_state) { | 116 : local_state_(local_state) { |
| 117 } | 117 } |
| 118 | 118 |
| 119 VariationsSeedStore::~VariationsSeedStore() { | 119 VariationsSeedStore::~VariationsSeedStore() { |
| 120 } | 120 } |
| 121 | 121 |
| 122 bool VariationsSeedStore::LoadSeed(VariationsSeed* seed) { | 122 bool VariationsSeedStore::LoadSeed(variations::VariationsSeed* seed) { |
| 123 const std::string base64_seed_data = | 123 const std::string base64_seed_data = |
| 124 local_state_->GetString(prefs::kVariationsSeed); | 124 local_state_->GetString(prefs::kVariationsSeed); |
| 125 if (base64_seed_data.empty()) { | 125 if (base64_seed_data.empty()) { |
| 126 RecordVariationSeedEmptyHistogram(VARIATIONS_SEED_EMPTY); | 126 RecordVariationSeedEmptyHistogram(VARIATIONS_SEED_EMPTY); |
| 127 return false; | 127 return false; |
| 128 } | 128 } |
| 129 | 129 |
| 130 // If the decode process fails, assume the pref value is corrupt and clear it. | 130 // If the decode process fails, assume the pref value is corrupt and clear it. |
| 131 std::string seed_data; | 131 std::string seed_data; |
| 132 if (!base::Base64Decode(base64_seed_data, &seed_data) || | 132 if (!base::Base64Decode(base64_seed_data, &seed_data) || |
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| 156 | 156 |
| 157 variations_serial_number_ = seed->serial_number(); | 157 variations_serial_number_ = seed->serial_number(); |
| 158 RecordVariationSeedEmptyHistogram(VARIATIONS_SEED_NOT_EMPTY); | 158 RecordVariationSeedEmptyHistogram(VARIATIONS_SEED_NOT_EMPTY); |
| 159 return true; | 159 return true; |
| 160 } | 160 } |
| 161 | 161 |
| 162 bool VariationsSeedStore::StoreSeedData( | 162 bool VariationsSeedStore::StoreSeedData( |
| 163 const std::string& seed_data, | 163 const std::string& seed_data, |
| 164 const std::string& base64_seed_signature, | 164 const std::string& base64_seed_signature, |
| 165 const base::Time& date_fetched, | 165 const base::Time& date_fetched, |
| 166 VariationsSeed* parsed_seed) { | 166 variations::VariationsSeed* parsed_seed) { |
| 167 if (seed_data.empty()) { | 167 if (seed_data.empty()) { |
| 168 VLOG(1) << "Variations seed data is empty, rejecting the seed."; | 168 VLOG(1) << "Variations seed data is empty, rejecting the seed."; |
| 169 return false; | 169 return false; |
| 170 } | 170 } |
| 171 | 171 |
| 172 // Only store the seed data if it parses correctly. | 172 // Only store the seed data if it parses correctly. |
| 173 VariationsSeed seed; | 173 variations::VariationsSeed seed; |
| 174 if (!seed.ParseFromString(seed_data)) { | 174 if (!seed.ParseFromString(seed_data)) { |
| 175 VLOG(1) << "Variations seed data is not in valid proto format, " | 175 VLOG(1) << "Variations seed data is not in valid proto format, " |
| 176 << "rejecting the seed."; | 176 << "rejecting the seed."; |
| 177 return false; | 177 return false; |
| 178 } | 178 } |
| 179 | 179 |
| 180 const VerifySignatureResult result = | 180 const VerifySignatureResult result = |
| 181 VerifySeedSignature(seed_data, base64_seed_signature); | 181 VerifySeedSignature(seed_data, base64_seed_signature); |
| 182 if (result != VARIATIONS_SEED_SIGNATURE_ENUM_SIZE) { | 182 if (result != VARIATIONS_SEED_SIGNATURE_ENUM_SIZE) { |
| 183 UMA_HISTOGRAM_ENUMERATION("Variations.StoreSeedSignature", result, | 183 UMA_HISTOGRAM_ENUMERATION("Variations.StoreSeedSignature", result, |
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| 266 } | 266 } |
| 267 | 267 |
| 268 verifier.VerifyUpdate(reinterpret_cast<const uint8*>(seed_bytes.data()), | 268 verifier.VerifyUpdate(reinterpret_cast<const uint8*>(seed_bytes.data()), |
| 269 seed_bytes.size()); | 269 seed_bytes.size()); |
| 270 if (verifier.VerifyFinal()) | 270 if (verifier.VerifyFinal()) |
| 271 return VARIATIONS_SEED_SIGNATURE_VALID; | 271 return VARIATIONS_SEED_SIGNATURE_VALID; |
| 272 return VARIATIONS_SEED_SIGNATURE_INVALID_SEED; | 272 return VARIATIONS_SEED_SIGNATURE_INVALID_SEED; |
| 273 } | 273 } |
| 274 | 274 |
| 275 } // namespace chrome_variations | 275 } // namespace chrome_variations |
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