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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 "base/bind.h"
#include "base/callback.h"
#include "base/files/file_util.h"
#include "base/json/json_file_value_serializer.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/prefs/json_pref_store.h"
#include "base/prefs/persistent_pref_store.h"
#include "base/prefs/pref_registry_simple.h"
#include "base/sequenced_task_runner.h"
#include "chrome/common/chrome_constants.h"
#include "chrome/common/pref_names.h"
#include "components/pref_registry/pref_registry_syncable.h"
#include "components/user_prefs/tracked/pref_hash_store_impl.h"
#include "components/user_prefs/tracked/pref_service_hash_store_contents.h"
#include "components/user_prefs/tracked/segregated_pref_store.h"
#include "components/user_prefs/tracked/tracked_preferences_migration.h"
namespace {
void RemoveValueSilently(const base::WeakPtr<JsonPrefStore> pref_store,
const std::string& key) {
if (pref_store) {
pref_store->RemoveValueSilently(
key, WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
}
}
} // 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) || defined(OS_CHROMEOS) || defined(OS_IOS)
false;
#else
true;
#endif
ProfilePrefStoreManager::ProfilePrefStoreManager(
const base::FilePath& profile_path,
const std::vector<PrefHashFilter::TrackedPreferenceMetadata>&
tracking_configuration,
size_t reporting_ids_count,
const std::string& seed,
const std::string& device_id,
PrefService* local_state)
: profile_path_(profile_path),
tracking_configuration_(tracking_configuration),
reporting_ids_count_(reporting_ids_count),
seed_(seed),
device_id_(device_id),
local_state_(local_state) {}
ProfilePrefStoreManager::~ProfilePrefStoreManager() {}
// static
void ProfilePrefStoreManager::RegisterPrefs(PrefRegistrySimple* registry) {
PrefServiceHashStoreContents::RegisterPrefs(registry);
}
// static
void ProfilePrefStoreManager::RegisterProfilePrefs(
user_prefs::PrefRegistrySyncable* registry) {
PrefHashFilter::RegisterProfilePrefs(registry);
}
// static
base::FilePath ProfilePrefStoreManager::GetPrefFilePathFromProfilePath(
const base::FilePath& profile_path) {
return profile_path.Append(chrome::kPreferencesFilename);
}
// static
void ProfilePrefStoreManager::ResetAllPrefHashStores(PrefService* local_state) {
PrefServiceHashStoreContents::ResetAllPrefHashStores(local_state);
}
// static
base::Time ProfilePrefStoreManager::GetResetTime(PrefService* pref_service) {
return PrefHashFilter::GetResetTime(pref_service);
}
// static
void ProfilePrefStoreManager::ClearResetTime(PrefService* pref_service) {
PrefHashFilter::ClearResetTime(pref_service);
}
PersistentPrefStore* ProfilePrefStoreManager::CreateProfilePrefStore(
const scoped_refptr<base::SequencedTaskRunner>& io_task_runner,
const base::Closure& on_reset_on_load,
TrackedPreferenceValidationDelegate* validation_delegate) {
scoped_ptr<PrefFilter> pref_filter;
if (!kPlatformSupportsPreferenceTracking) {
return new JsonPrefStore(GetPrefFilePathFromProfilePath(profile_path_),
io_task_runner.get(),
scoped_ptr<PrefFilter>());
}
std::vector<PrefHashFilter::TrackedPreferenceMetadata>
unprotected_configuration;
std::vector<PrefHashFilter::TrackedPreferenceMetadata>
protected_configuration;
std::set<std::string> protected_pref_names;
std::set<std::string> unprotected_pref_names;
for (std::vector<PrefHashFilter::TrackedPreferenceMetadata>::const_iterator
it = tracking_configuration_.begin();
it != tracking_configuration_.end();
++it) {
if (it->enforcement_level > PrefHashFilter::NO_ENFORCEMENT) {
protected_configuration.push_back(*it);
protected_pref_names.insert(it->name);
} else {
unprotected_configuration.push_back(*it);
unprotected_pref_names.insert(it->name);
}
}
scoped_ptr<PrefHashFilter> unprotected_pref_hash_filter(
new PrefHashFilter(GetPrefHashStore(false),
unprotected_configuration,
base::Closure(),
validation_delegate,
reporting_ids_count_,
false));
scoped_ptr<PrefHashFilter> protected_pref_hash_filter(
new PrefHashFilter(GetPrefHashStore(true),
protected_configuration,
on_reset_on_load,
validation_delegate,
reporting_ids_count_,
true));
PrefHashFilter* raw_unprotected_pref_hash_filter =
unprotected_pref_hash_filter.get();
PrefHashFilter* raw_protected_pref_hash_filter =
protected_pref_hash_filter.get();
scoped_refptr<JsonPrefStore> unprotected_pref_store(
new JsonPrefStore(GetPrefFilePathFromProfilePath(profile_path_),
io_task_runner.get(),
unprotected_pref_hash_filter.Pass()));
// TODO(gab): Remove kDeprecatedProtectedPreferencesFilename as an alternate
// file in M40+.
scoped_refptr<JsonPrefStore> protected_pref_store(new JsonPrefStore(
profile_path_.Append(chrome::kSecurePreferencesFilename),
profile_path_.Append(chrome::kProtectedPreferencesFilenameDeprecated),
io_task_runner.get(),
protected_pref_hash_filter.Pass()));
SetupTrackedPreferencesMigration(
unprotected_pref_names, protected_pref_names,
base::Bind(&RemoveValueSilently, unprotected_pref_store->AsWeakPtr()),
base::Bind(&RemoveValueSilently, protected_pref_store->AsWeakPtr()),
base::Bind(&JsonPrefStore::RegisterOnNextSuccessfulWriteCallback,
unprotected_pref_store->AsWeakPtr()),
base::Bind(&JsonPrefStore::RegisterOnNextSuccessfulWriteCallback,
protected_pref_store->AsWeakPtr()),
GetPrefHashStore(false), GetPrefHashStore(true),
scoped_ptr<HashStoreContents>(new PrefServiceHashStoreContents(
profile_path_.AsUTF8Unsafe(), local_state_)),
raw_unprotected_pref_hash_filter, raw_protected_pref_hash_filter);
return new SegregatedPrefStore(unprotected_pref_store, protected_pref_store,
protected_pref_names);
}
bool ProfilePrefStoreManager::InitializePrefsFromMasterPrefs(
const 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;
const base::DictionaryValue* to_serialize = &master_prefs;
scoped_ptr<base::DictionaryValue> copy;
if (kPlatformSupportsPreferenceTracking) {
copy.reset(master_prefs.DeepCopy());
to_serialize = copy.get();
PrefHashFilter(GetPrefHashStore(false),
tracking_configuration_,
base::Closure(),
NULL,
reporting_ids_count_,
false).Initialize(copy.get());
}
// This will write out to a single combined file which will be immediately
// migrated to two files on load.
JSONFileValueSerializer serializer(
GetPrefFilePathFromProfilePath(profile_path_));
// 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(*to_serialize);
UMA_HISTOGRAM_BOOLEAN("Settings.InitializedFromMasterPrefs", success);
return success;
}
PersistentPrefStore*
ProfilePrefStoreManager::CreateDeprecatedCombinedProfilePrefStore(
const scoped_refptr<base::SequencedTaskRunner>& io_task_runner) {
scoped_ptr<PrefFilter> pref_filter;
if (kPlatformSupportsPreferenceTracking) {
scoped_ptr<PrefHashStoreImpl> pref_hash_store_impl(
new PrefHashStoreImpl(seed_, device_id_, true));
pref_hash_store_impl->set_legacy_hash_store_contents(
scoped_ptr<HashStoreContents>(new PrefServiceHashStoreContents(
profile_path_.AsUTF8Unsafe(), local_state_)));
pref_filter.reset(new PrefHashFilter(pref_hash_store_impl.Pass(),
tracking_configuration_,
base::Closure(),
NULL,
reporting_ids_count_,
false));
}
return new JsonPrefStore(GetPrefFilePathFromProfilePath(profile_path_),
io_task_runner.get(),
pref_filter.Pass());
}
scoped_ptr<PrefHashStore> ProfilePrefStoreManager::GetPrefHashStore(
bool use_super_mac) {
DCHECK(kPlatformSupportsPreferenceTracking);
return scoped_ptr<PrefHashStore>(new PrefHashStoreImpl(
seed_,
device_id_,
use_super_mac));
}
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