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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/prefs/profile_pref_store_manager.h"
#include <utility>
#include "base/check.h"
#include "base/files/file_util.h"
#include "base/json/json_file_value_serializer.h"
#include "base/metrics/histogram_macros.h"
#include "base/strings/string_util.h"
#include "base/task/sequenced_task_runner.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "chrome/browser/prefs/browser_prefs.h"
#include "chrome/common/chrome_constants.h"
#include "components/prefs/json_pref_store.h"
#include "components/prefs/persistent_pref_store.h"
#include "components/prefs/pref_registry_simple.h"
#include "services/preferences/public/mojom/preferences.mojom.h"
#include "services/preferences/tracked/pref_hash_filter.h"
#include "services/preferences/tracked/tracked_persistent_pref_store_factory.h"
#if defined(OS_WIN)
#include "chrome/install_static/install_util.h"
#endif
namespace {
#if defined(OS_WIN)
// Forces a different registry key to be used for storing preference validation
// MACs. See |SetPreferenceValidationRegistryPathForTesting|.
const std::wstring* g_preference_validation_registry_path_for_testing = nullptr;
#endif // OS_WIN
} // namespace
// Preference tracking and protection is not required on platforms where other
// apps do not have access to chrome's persistent storage.
const bool ProfilePrefStoreManager::kPlatformSupportsPreferenceTracking =
#if defined(OS_ANDROID) || BUILDFLAG(IS_CHROMEOS_ASH)
false;
#else
true;
#endif
ProfilePrefStoreManager::ProfilePrefStoreManager(
const base::FilePath& profile_path,
const std::string& seed,
const std::string& legacy_device_id)
: profile_path_(profile_path),
seed_(seed),
legacy_device_id_(legacy_device_id) {}
ProfilePrefStoreManager::~ProfilePrefStoreManager() = default;
// static
void ProfilePrefStoreManager::RegisterProfilePrefs(
user_prefs::PrefRegistrySyncable* registry) {
PrefHashFilter::RegisterProfilePrefs(registry);
}
// static
base::Time ProfilePrefStoreManager::GetResetTime(PrefService* pref_service) {
return PrefHashFilter::GetResetTime(pref_service);
}
// static
void ProfilePrefStoreManager::ClearResetTime(PrefService* pref_service) {
PrefHashFilter::ClearResetTime(pref_service);
}
#if defined(OS_WIN)
// static
void ProfilePrefStoreManager::SetPreferenceValidationRegistryPathForTesting(
const std::wstring* path) {
DCHECK(!path->empty());
g_preference_validation_registry_path_for_testing = path;
}
#endif // OS_WIN
PersistentPrefStore* ProfilePrefStoreManager::CreateProfilePrefStore(
std::vector<prefs::mojom::TrackedPreferenceMetadataPtr>
tracking_configuration,
size_t reporting_ids_count,
scoped_refptr<base::SequencedTaskRunner> io_task_runner,
mojo::PendingRemote<prefs::mojom::ResetOnLoadObserver>
reset_on_load_observer,
mojo::PendingRemote<prefs::mojom::TrackedPreferenceValidationDelegate>
validation_delegate) {
if (!kPlatformSupportsPreferenceTracking) {
return new JsonPrefStore(profile_path_.Append(chrome::kPreferencesFilename),
nullptr, io_task_runner);
}
return CreateTrackedPersistentPrefStore(
CreateTrackedPrefStoreConfiguration(
std::move(tracking_configuration), reporting_ids_count,
std::move(reset_on_load_observer), std::move(validation_delegate)),
io_task_runner);
}
bool ProfilePrefStoreManager::InitializePrefsFromMasterPrefs(
std::vector<prefs::mojom::TrackedPreferenceMetadataPtr>
tracking_configuration,
size_t reporting_ids_count,
std::unique_ptr<base::DictionaryValue> master_prefs) {
// Create the profile directory if it doesn't exist yet (very possible on
// first run).
if (!base::CreateDirectory(profile_path_))
return false;
if (kPlatformSupportsPreferenceTracking) {
InitializeMasterPrefsTracking(
CreateTrackedPrefStoreConfiguration(std::move(tracking_configuration),
reporting_ids_count, {},
mojo::NullRemote()),
master_prefs.get());
}
// This will write out to a single combined file which will be immediately
// migrated to two files on load.
JSONFileValueSerializer serializer(
profile_path_.Append(chrome::kPreferencesFilename));
// Call Serialize (which does IO) on the main thread, which would _normally_
// be verboten. In this case however, we require this IO to synchronously
// complete before Chrome can start (as master preferences seed the Local
// State and Preferences files). This won't trip ThreadIORestrictions as they
// won't have kicked in yet on the main thread.
bool success = serializer.Serialize(*master_prefs);
return success;
}
prefs::mojom::TrackedPersistentPrefStoreConfigurationPtr
ProfilePrefStoreManager::CreateTrackedPrefStoreConfiguration(
std::vector<prefs::mojom::TrackedPreferenceMetadataPtr>
tracking_configuration,
size_t reporting_ids_count,
mojo::PendingRemote<prefs::mojom::ResetOnLoadObserver>
reset_on_load_observer,
mojo::PendingRemote<prefs::mojom::TrackedPreferenceValidationDelegate>
validation_delegate) {
return prefs::mojom::TrackedPersistentPrefStoreConfiguration::New(
profile_path_.Append(chrome::kPreferencesFilename),
profile_path_.Append(chrome::kSecurePreferencesFilename),
std::move(tracking_configuration), reporting_ids_count, seed_,
legacy_device_id_, "ChromeRegistryHashStoreValidationSeed",
#if defined(OS_WIN)
base::AsString16(g_preference_validation_registry_path_for_testing
? *g_preference_validation_registry_path_for_testing
: install_static::GetRegistryPath()),
#else
std::u16string(),
#endif
std::move(validation_delegate), std::move(reset_on_load_observer));
}
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