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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/safety_hub/revoked_permissions_service.h"
#include <memory>
#include <string>
#include "base/check.h"
#include "base/feature_list.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/json/values_util.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/metrics/field_trial_params.h"
#include "base/metrics/histogram_functions.h"
#include "base/run_loop.h"
#include "base/strings/string_number_conversions.h"
#include "base/task/task_traits.h"
#include "base/task/thread_pool.h"
#include "base/time/clock.h"
#include "base/time/default_clock.h"
#include "base/time/time.h"
#include "base/values.h"
#include "build/build_config.h"
#include "chrome/app/chrome_command_ids.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/engagement/site_engagement_service_factory.h"
#include "chrome/browser/ui/safety_hub/safety_hub_prefs.h"
#include "chrome/browser/ui/safety_hub/safety_hub_service.h"
#include "chrome/browser/ui/safety_hub/safety_hub_util.h"
#include "chrome/common/chrome_features.h"
#include "chrome/grit/generated_resources.h"
#include "components/content_settings/core/browser/content_settings_info.h"
#include "components/content_settings/core/browser/content_settings_registry.h"
#include "components/content_settings/core/browser/content_settings_uma_util.h"
#include "components/content_settings/core/browser/content_settings_utils.h"
#include "components/content_settings/core/browser/host_content_settings_map.h"
#include "components/content_settings/core/browser/website_settings_info.h"
#include "components/content_settings/core/browser/website_settings_registry.h"
#include "components/content_settings/core/common/content_settings.h"
#include "components/content_settings/core/common/content_settings_constraints.h"
#include "components/content_settings/core/common/content_settings_pattern.h"
#include "components/content_settings/core/common/content_settings_types.h"
#include "components/content_settings/core/common/content_settings_utils.h"
#include "components/content_settings/core/common/features.h"
#include "components/permissions/constants.h"
#include "components/permissions/permission_uma_util.h"
#include "components/permissions/pref_names.h"
#include "components/prefs/pref_change_registrar.h"
#include "components/prefs/pref_service.h"
#include "components/safe_browsing/core/common/features.h"
#include "components/safe_browsing/core/common/safe_browsing_prefs.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
#include "revoked_permissions_service.h"
#include "ui/base/l10n/l10n_util.h"
#include "url/gurl.h"
#include "url/origin.h"
#if BUILDFLAG(SAFE_BROWSING_AVAILABLE)
#include "chrome/browser/safe_browsing/safe_browsing_service.h"
#endif
constexpr base::TimeDelta kRevocationThresholdNoDelayForTesting = base::Days(0);
constexpr base::TimeDelta kRevocationThresholdWithDelayForTesting =
base::Minutes(5);
namespace {
constexpr char kUnknownContentSettingsType[] = "unknown";
// Reflects the maximum number of days between a permissions being revoked and
// the time when the user regrants the permission through the unused site
// permission module of Safete Check. The maximum number of days is determined
// by `kRevocationCleanUpThreshold`.
size_t kAllowAgainMetricsExclusiveMaxCount = 31;
// Using a single bucket per day, following the value of
// |kAllowAgainMetricsExclusiveMaxCount|.
size_t kAllowAgainMetricsBuckets = 31;
base::TimeDelta GetRevocationThreshold() {
// TODO(crbug.com/40250875): Clean up no delay revocation after the feature is
// ready. Today, no delay revocation is necessary to enable manual testing.
if (content_settings::features::kSafetyCheckUnusedSitePermissionsNoDelay
.Get()) {
return kRevocationThresholdNoDelayForTesting;
} else if (content_settings::features::
kSafetyCheckUnusedSitePermissionsWithDelay.Get()) {
return kRevocationThresholdWithDelayForTesting;
}
return content_settings::features::
kSafetyCheckUnusedSitePermissionsRevocationThreshold.Get();
}
bool IsContentSetting(ContentSettingsType type) {
auto* content_setting_registry =
content_settings::ContentSettingsRegistry::GetInstance();
return content_setting_registry->Get(type);
}
bool IsWebsiteSetting(ContentSettingsType type) {
auto* website_setting_registry =
content_settings::WebsiteSettingsRegistry::GetInstance();
return website_setting_registry->Get(type);
}
bool IsChooserPermissionSupported() {
return base::FeatureList::IsEnabled(
content_settings::features::
kSafetyCheckUnusedSitePermissionsForSupportedChooserPermissions);
}
base::Value::List ConvertContentSettingsIntValuesToString(
const base::Value::List& content_settings_values_list,
bool* successful_migration) {
base::Value::List string_value_list;
for (const base::Value& setting_value : content_settings_values_list) {
if (setting_value.is_int()) {
int setting_int = setting_value.GetInt();
auto setting_name =
RevokedPermissionsService::ConvertContentSettingsTypeToKey(
static_cast<ContentSettingsType>(setting_int));
if (setting_name == kUnknownContentSettingsType) {
*successful_migration = false;
string_value_list.Append(setting_value.GetInt());
} else {
string_value_list.Append(setting_name);
}
} else {
DCHECK(setting_value.is_string());
// Store string group name values.
string_value_list.Append(setting_value.GetString());
}
}
return string_value_list;
}
base::Value::Dict ConvertChooserContentSettingsIntValuesToString(
const base::Value::Dict& chooser_content_settings_values_dict) {
base::Value::Dict string_keyed_dict;
for (const auto [key, value] : chooser_content_settings_values_dict) {
int number = -1;
base::StringToInt(key, &number);
// If number conversion fails it returns 0 which is not a chooser permission
// enum value so it will not clash with the conversion.
if (number == 0) {
// Store string keyed values as is.
string_keyed_dict.Set(key, value.GetDict().Clone());
} else {
string_keyed_dict.Set(
RevokedPermissionsService::ConvertContentSettingsTypeToKey(
static_cast<ContentSettingsType>(number)),
value.GetDict().Clone());
}
}
return string_keyed_dict;
}
content_settings::ContentSettingConstraints GetConstraintFromInfo(
const content_settings::SettingInfo& info) {
auto constraint = content_settings::ContentSettingConstraints(
info.metadata.expiration() - info.metadata.lifetime());
constraint.set_lifetime(info.metadata.lifetime());
return constraint;
}
bool IsUnusedPermissionRevocation(PermissionsRevocationType revocation_type) {
return revocation_type == PermissionsRevocationType::kUnusedPermissions ||
revocation_type == PermissionsRevocationType::
kUnusedPermissionsAndAbusiveNotifications ||
revocation_type == PermissionsRevocationType::
kUnusedPermissionsAndDisruptiveNotifications;
}
bool IsAbusiveNotificationPermissionRevocation(
PermissionsRevocationType revocation_type) {
return revocation_type ==
PermissionsRevocationType::kAbusiveNotificationPermissions ||
revocation_type == PermissionsRevocationType::
kUnusedPermissionsAndAbusiveNotifications;
}
bool IsDisruptiveNotificationPermissionRevocation(
PermissionsRevocationType revocation_type) {
return revocation_type ==
PermissionsRevocationType::kDisruptiveNotificationPermissions ||
revocation_type == PermissionsRevocationType::
kUnusedPermissionsAndDisruptiveNotifications;
}
} // namespace
// static
std::string RevokedPermissionsService::ConvertContentSettingsTypeToKey(
ContentSettingsType type) {
auto* website_setting_registry =
content_settings::WebsiteSettingsRegistry::GetInstance();
DCHECK(website_setting_registry);
auto* website_settings_info = website_setting_registry->Get(type);
if (!website_settings_info) {
auto integer_type = static_cast<int32_t>(type);
DVLOG(1) << "Couldn't retrieve website settings info entry from the "
"registry for type: "
<< integer_type;
base::UmaHistogramSparse(
"Settings.SafetyCheck.UnusedSitePermissionsMigrationFail",
integer_type);
return kUnknownContentSettingsType;
}
return website_settings_info->name();
}
// static
ContentSettingsType RevokedPermissionsService::ConvertKeyToContentSettingsType(
const std::string& key) {
auto* website_setting_registry =
content_settings::WebsiteSettingsRegistry::GetInstance();
return website_setting_registry->GetByName(key)->type();
}
// static
url::Origin RevokedPermissionsService::ConvertPrimaryPatternToOrigin(
const ContentSettingsPattern& primary_pattern) {
GURL origin_url = GURL(primary_pattern.ToString());
CHECK(origin_url.is_valid());
return url::Origin::Create(origin_url);
}
base::TimeDelta RevokedPermissionsService::GetRepeatedUpdateInterval() {
return content_settings::features::
kSafetyCheckUnusedSitePermissionsRepeatedUpdateInterval.Get();
}
RevokedPermissionsService::TabHelper::TabHelper(
content::WebContents* web_contents,
RevokedPermissionsService* unused_site_permission_service)
: content::WebContentsObserver(web_contents),
content::WebContentsUserData<TabHelper>(*web_contents),
unused_site_permission_service_(
unused_site_permission_service->AsWeakPtr()) {}
RevokedPermissionsService::TabHelper::~TabHelper() = default;
PermissionsData::PermissionsData() = default;
PermissionsData::~PermissionsData() = default;
PermissionsData::PermissionsData(const PermissionsData& other)
: primary_pattern(other.primary_pattern),
permission_types(other.permission_types),
constraints(other.constraints.Clone()),
revocation_type(other.revocation_type) {
chooser_permissions_data = other.chooser_permissions_data.Clone();
}
RevokedPermissionsService::RevokedPermissionsResult::
RevokedPermissionsResult() = default;
RevokedPermissionsService::RevokedPermissionsResult::
~RevokedPermissionsResult() = default;
RevokedPermissionsService::RevokedPermissionsResult::RevokedPermissionsResult(
const RevokedPermissionsResult&) = default;
std::unique_ptr<SafetyHubService::Result>
RevokedPermissionsService::RevokedPermissionsResult::Clone() const {
return std::make_unique<RevokedPermissionsResult>(*this);
}
void RevokedPermissionsService::RevokedPermissionsResult::AddRevokedPermission(
PermissionsData permissions_data) {
revoked_permissions_.push_back(std::move(permissions_data));
}
const std::list<PermissionsData>&
RevokedPermissionsService::RevokedPermissionsResult::GetRevokedPermissions() {
return revoked_permissions_;
}
std::set<ContentSettingsPattern>
RevokedPermissionsService::RevokedPermissionsResult::GetRevokedOrigins() const {
std::set<ContentSettingsPattern> origins;
for (const auto& permission : revoked_permissions_) {
origins.insert(permission.primary_pattern);
}
return origins;
}
base::Value::Dict
RevokedPermissionsService::RevokedPermissionsResult::ToDictValue() const {
base::Value::Dict result = BaseToDictValue();
base::Value::List revoked_origins;
for (const auto& permission : revoked_permissions_) {
revoked_origins.Append(permission.primary_pattern.ToString());
}
result.Set(kRevokedPermissionsResultKey, std::move(revoked_origins));
return result;
}
bool RevokedPermissionsService::RevokedPermissionsResult::
IsTriggerForMenuNotification() const {
// A menu notification should be shown when there is at least one permission
// that was revoked.
return !GetRevokedOrigins().empty();
}
bool RevokedPermissionsService::RevokedPermissionsResult::
WarrantsNewMenuNotification(
const base::Value::Dict& previous_result_dict) const {
std::set<ContentSettingsPattern> old_origins;
for (const base::Value& origin_val :
*previous_result_dict.FindList(kRevokedPermissionsResultKey)) {
// Before crrev.com/c/5000387, the revoked permissions were stored in a dict
// that looked as follows:
// {
// "origin": "site.com",
// "permissionTypes": [...permissions],
// "expiration": TimeValue
// }
// After this CL, the list was updated to a list of strings representing
// the origins. To maintain backwards compatibility, support these
// old values for now. This check can be deleted in the future.
const std::string* origin_str{};
if (origin_val.is_dict()) {
const base::Value::Dict& revoked_permission = origin_val.GetDict();
origin_str = revoked_permission.FindString(kSafetyHubOriginKey);
} else if (origin_val.is_string()) {
origin_str = &origin_val.GetString();
} else {
NOTREACHED();
}
ContentSettingsPattern origin =
ContentSettingsPattern::FromString(*origin_str);
old_origins.insert(origin);
}
std::set<ContentSettingsPattern> new_origins = GetRevokedOrigins();
return !std::ranges::includes(old_origins, new_origins);
}
std::u16string
RevokedPermissionsService::RevokedPermissionsResult::GetNotificationString()
const {
if (revoked_permissions_.empty()) {
return std::u16string();
}
return l10n_util::GetPluralStringFUTF16(
IDS_SETTINGS_SAFETY_HUB_REVOKED_PERMISSIONS_MENU_NOTIFICATION,
revoked_permissions_.size());
}
int RevokedPermissionsService::RevokedPermissionsResult::
GetNotificationCommandId() const {
return IDC_OPEN_SAFETY_HUB;
}
void RevokedPermissionsService::TabHelper::PrimaryPageChanged(
content::Page& page) {
Profile* profile =
Profile::FromBrowserContext(web_contents()->GetBrowserContext());
DisruptiveNotificationPermissionsManager::MaybeReportFalsePositive(
profile, page.GetMainDocument().GetLastCommittedURL(),
DisruptiveNotificationPermissionsManager::FalsePositiveReason::kPageVisit,
page.GetMainDocument().GetPageUkmSourceId());
if (unused_site_permission_service_) {
unused_site_permission_service_->OnPageVisited(
page.GetMainDocument().GetLastCommittedOrigin());
}
}
WEB_CONTENTS_USER_DATA_KEY_IMPL(RevokedPermissionsService::TabHelper);
RevokedPermissionsService::RevokedPermissionsService(
content::BrowserContext* browser_context,
PrefService* prefs)
: browser_context_(browser_context),
clock_(base::DefaultClock::GetInstance()) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
DCHECK(browser_context_);
content_settings_observation_.Observe(hcsm());
pref_change_registrar_ = std::make_unique<PrefChangeRegistrar>();
pref_change_registrar_->Init(prefs);
#if BUILDFLAG(IS_ANDROID)
if (base::FeatureList::IsEnabled(features::kSafetyHub)) {
pref_change_registrar_->Add(
safety_hub_prefs::kUnusedSitePermissionsRevocationEnabled,
base::BindRepeating(&RevokedPermissionsService::
OnPermissionsAutorevocationControlChanged,
base::Unretained(this)));
}
#else // BUILDFLAG(IS_ANDROID)
pref_change_registrar_->Add(
safety_hub_prefs::kUnusedSitePermissionsRevocationEnabled,
base::BindRepeating(
&RevokedPermissionsService::OnPermissionsAutorevocationControlChanged,
base::Unretained(this)));
#endif // BUILDFLAG(IS_ANDROID)
abusive_notification_manager_ =
std::make_unique<AbusiveNotificationPermissionsManager>(
#if BUILDFLAG(SAFE_BROWSING_AVAILABLE)
g_browser_process->safe_browsing_service()
? g_browser_process->safe_browsing_service()->database_manager()
: nullptr,
#else
nullptr,
#endif
hcsm(), pref_change_registrar_->prefs());
pref_change_registrar_->Add(
prefs::kSafeBrowsingEnabled,
base::BindRepeating(
&RevokedPermissionsService::OnPermissionsAutorevocationControlChanged,
base::Unretained(this)));
if (base::FeatureList::IsEnabled(
features::kSafetyHubDisruptiveNotificationRevocation)) {
disruptive_notification_manager_ =
std::make_unique<DisruptiveNotificationPermissionsManager>(
hcsm(),
site_engagement::SiteEngagementServiceFactory::GetForProfile(
browser_context_));
}
bool migration_completed = pref_change_registrar_->prefs()->GetBoolean(
safety_hub_prefs::kUnusedSitePermissionsRevocationMigrationCompleted);
if (!migration_completed) {
// Convert all integer permission values to string, if there is any
// permission represented by integer stored in disk.
// TODO(crbug.com/41495119): Clean up this migration after some milestones.
UpdateIntegerValuesToGroupName();
}
InitializeLatestResult();
if (IsUnusedSiteAutoRevocationEnabled() ||
IsAbusiveNotificationAutoRevocationEnabled()) {
hcsm()->EnsureSettingsUpToDate(
base::BindOnce(&RevokedPermissionsService::MaybeStartRepeatedUpdates,
weak_factory_.GetWeakPtr()));
}
}
RevokedPermissionsService::~RevokedPermissionsService() = default;
void RevokedPermissionsService::MaybeStartRepeatedUpdates() {
if (IsUnusedSiteAutoRevocationEnabled() ||
IsAbusiveNotificationAutoRevocationEnabled()) {
StartRepeatedUpdates();
}
}
std::unique_ptr<SafetyHubService::Result>
RevokedPermissionsService::InitializeLatestResultImpl() {
return GetRevokedPermissions();
}
void RevokedPermissionsService::OnContentSettingChanged(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsTypeSet content_type_set) {
// When permissions change for a pattern it is either (1) through resetting
// permissions, e.g. in page info or site settings, (2) user modifying
// permissions manually, (3) through auto-revocation of unused site
// permissions that this module performs, (4) through auto-revocation of
// abusive notifications that this module performs, or (5) through
// auto-revocation of disruptive notifications that this module performs. In
// (1) and (2) the pattern should no longer be shown to the user.
bool should_clean_revoked_permission_data = true;
// If `content_type_set` contains all types, all permissions are changed at
// once and all revoked permissions should be cleaned up. Since `GetType()`
// can only be called when `ContainsAllTypes()` is false, skip the switch in
// this case.
if (!content_type_set.ContainsAllTypes()) {
switch (content_type_set.GetType()) {
case ContentSettingsType::REVOKED_UNUSED_SITE_PERMISSIONS:
case ContentSettingsType::REVOKED_ABUSIVE_NOTIFICATION_PERMISSIONS:
case ContentSettingsType::REVOKED_DISRUPTIVE_NOTIFICATION_PERMISSIONS:
// If content setting is changed because of auto revocation, the revoked
// permission data should not be deleted.
should_clean_revoked_permission_data = false;
break;
default:
// If the permission is changed by users, then clean up the
// revoked permissions data. However if the permission is changed
// because of Safety Hub revocation, then the revoked permission
// data should not be revoked.
const bool is_abusive_revocation_running =
IsAbusiveNotificationAutoRevocationEnabled()
? abusive_notification_manager_->IsRevocationRunning()
: false;
const bool is_disruptive_revocation_running =
disruptive_notification_manager_
? disruptive_notification_manager_->IsRunning()
: false;
should_clean_revoked_permission_data =
!is_unused_site_revocation_running &&
!is_abusive_revocation_running && !is_disruptive_revocation_running;
break;
}
}
if (should_clean_revoked_permission_data) {
DeletePatternFromRevokedPermissionList(primary_pattern, secondary_pattern);
if (IsAbusiveNotificationAutoRevocationEnabled()) {
abusive_notification_manager_
->DeletePatternFromRevokedAbusiveNotificationList(primary_pattern,
secondary_pattern);
}
// TODO(crbug.com/406475122): Clean up the disruptive notification list.
}
}
void RevokedPermissionsService::Shutdown() {
content_settings_observation_.Reset();
}
void RevokedPermissionsService::RegrantPermissionsForOrigin(
const url::Origin& origin) {
if (IsAbusiveNotificationAutoRevocationEnabled()) {
abusive_notification_manager_->RegrantPermissionForOriginIfNecessary(
origin.GetURL());
}
if (disruptive_notification_manager_) {
disruptive_notification_manager_->RegrantPermissionForUrl(origin.GetURL());
}
content_settings::SettingInfo info;
base::Value stored_value(hcsm()->GetWebsiteSetting(
origin.GetURL(), origin.GetURL(),
ContentSettingsType::REVOKED_UNUSED_SITE_PERMISSIONS, &info));
if (!stored_value.is_dict()) {
return;
}
base::Value::List* permission_type_list =
stored_value.GetDict().FindList(permissions::kRevokedKey);
CHECK(permission_type_list);
// Set this to true to prevent `OnContentSettingChanged` from removing
// revoked setting values, since this is set with specific values below.
is_unused_site_revocation_running = true;
for (auto& permission_type : *permission_type_list) {
// Look up ContentSettingsRegistry to see if type is content setting
// or website setting.
ContentSettingsType type =
ConvertKeyToContentSettingsType(permission_type.GetString());
if (IsContentSetting(type)) {
// ContentSettingsRegistry-based permissions with ALLOW value were
// revoked; re-grant them by setting ALLOW again.
hcsm()->SetContentSettingCustomScope(
info.primary_pattern, info.secondary_pattern, type,
ContentSetting::CONTENT_SETTING_ALLOW);
} else if (IsChooserPermissionSupported() && IsWebsiteSetting(type)) {
auto* chooser_permissions_data = stored_value.GetDict().FindDict(
permissions::kRevokedChooserPermissionsKey);
// There should be always data attached for a revoked chooser permission.
DCHECK(chooser_permissions_data);
// Chooser permissions are WebsiteSettingsRegistry-based, so it is
// re-granted by restoring the previously revoked Website Setting value.
auto* revoked_value = chooser_permissions_data->FindDict(
ConvertContentSettingsTypeToKey(type));
DCHECK(revoked_value);
hcsm()->SetWebsiteSettingCustomScope(
info.primary_pattern, info.secondary_pattern, type,
base::Value(std::move(*revoked_value)));
} else {
NOTREACHED() << "Unable to find ContentSettingsType in neither "
<< "ContentSettingsRegistry nor WebsiteSettingsRegistry: "
<< ConvertContentSettingsTypeToKey(type);
}
}
// Set this back to false, so that `OnContentSettingChanged` can cleanup
// revoked settings if necessary.
is_unused_site_revocation_running = false;
// Ignore origin from future auto-revocations.
IgnoreOriginForAutoRevocation(origin);
// Remove origin from revoked permissions list.
DeletePatternFromRevokedPermissionList(info.primary_pattern,
info.secondary_pattern);
// Record the days elapsed from auto-revocation to regrant.
base::Time revoked_time =
info.metadata.expiration() -
content_settings::features::
kSafetyCheckUnusedSitePermissionsRevocationCleanUpThreshold.Get();
base::UmaHistogramCustomCounts(
"Settings.SafetyCheck.UnusedSitePermissionsAllowAgainDays",
(clock_->Now() - revoked_time).InDays(), 0,
kAllowAgainMetricsExclusiveMaxCount, kAllowAgainMetricsBuckets);
}
void RevokedPermissionsService::UndoRegrantPermissionsForOrigin(
const PermissionsData& permissions_data) {
if (IsAbusiveNotificationAutoRevocationEnabled()) {
abusive_notification_manager_->UndoRegrantPermissionForOriginIfNecessary(
GURL(permissions_data.primary_pattern.ToString()),
permissions_data.permission_types,
permissions_data.constraints.Clone());
}
if (disruptive_notification_manager_) {
disruptive_notification_manager_->UndoRegrantPermissionForUrl(
GURL(permissions_data.primary_pattern.ToString()),
permissions_data.permission_types,
permissions_data.constraints.Clone());
}
// If `permissions_data` had abusive notifications revoked, remove the
// `NOTIFICATIONS` setting from the list of permission types to handle below,
// since these were already handled. If there are no unused site permissions
// to handle below, then return. Otherwise, handle them below.
const std::set<ContentSettingsType> unused_site_permission_types =
GetRevokedUnusedSitePermissionTypes(permissions_data.permission_types);
if (unused_site_permission_types.empty()) {
return;
}
// Set this to true to prevent `OnContentSettingChanged` from removing
// revoked setting values, since this is set with specific values below.
is_unused_site_revocation_running = true;
for (const auto& permission : unused_site_permission_types) {
if (IsContentSetting(permission)) {
hcsm()->SetContentSettingCustomScope(
permissions_data.primary_pattern, ContentSettingsPattern::Wildcard(),
permission, ContentSetting::CONTENT_SETTING_DEFAULT);
} else if (IsChooserPermissionSupported() && IsWebsiteSetting(permission)) {
hcsm()->SetWebsiteSettingDefaultScope(
permissions_data.primary_pattern.ToRepresentativeUrl(), GURL(),
permission, base::Value());
} else {
NOTREACHED() << "Unable to find ContentSettingsType in neither "
<< "ContentSettingsRegistry nor WebsiteSettingsRegistry: "
<< ConvertContentSettingsTypeToKey(permission);
}
}
// Set this back to false, so that `OnContentSettingChanged` can cleanup
// revoked settings if necessary.
is_unused_site_revocation_running = false;
StorePermissionInUnusedSitePermissionSetting(
unused_site_permission_types, permissions_data.chooser_permissions_data,
permissions_data.constraints.Clone(), permissions_data.primary_pattern,
ContentSettingsPattern::Wildcard());
}
void RevokedPermissionsService::ClearRevokedPermissionsList() {
if (IsAbusiveNotificationAutoRevocationEnabled()) {
abusive_notification_manager_->ClearRevokedPermissionsList();
}
if (disruptive_notification_manager_) {
disruptive_notification_manager_->ClearRevokedPermissionsList();
}
for (const auto& revoked_permissions : hcsm()->GetSettingsForOneType(
ContentSettingsType::REVOKED_UNUSED_SITE_PERMISSIONS)) {
DeletePatternFromRevokedPermissionList(
revoked_permissions.primary_pattern,
revoked_permissions.secondary_pattern);
}
}
void RevokedPermissionsService::IgnoreOriginForAutoRevocation(
const url::Origin& origin) {
auto* registry = content_settings::ContentSettingsRegistry::GetInstance();
for (const content_settings::ContentSettingsInfo* info : *registry) {
ContentSettingsType type = info->website_settings_info()->type();
for (const auto& setting : hcsm()->GetSettingsForOneType(type)) {
if (setting.metadata.last_visited() != base::Time() &&
setting.primary_pattern.MatchesSingleOrigin() &&
setting.primary_pattern.Matches(origin.GetURL())) {
hcsm()->ResetLastVisitedTime(setting.primary_pattern,
setting.secondary_pattern, type);
break;
}
}
}
}
// Called by TabHelper when a URL was visited.
void RevokedPermissionsService::OnPageVisited(const url::Origin& origin) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
// Check if this origin has unused permissions.
auto origin_entry = recently_unused_permissions_.find(origin.Serialize());
if (origin_entry == recently_unused_permissions_.end()) {
return;
}
// See which permissions of the origin actually match the URL and update them.
auto& site_permissions = origin_entry->second;
for (auto it = site_permissions.begin(); it != site_permissions.end();) {
if (it->source.primary_pattern.Matches(origin.GetURL())) {
hcsm()->UpdateLastVisitedTime(it->source.primary_pattern,
it->source.secondary_pattern, it->type);
site_permissions.erase(it++);
} else {
it++;
}
}
// Remove origin entry if all permissions were updated.
if (site_permissions.empty()) {
recently_unused_permissions_.erase(origin_entry);
}
}
void RevokedPermissionsService::DeletePatternFromRevokedPermissionList(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern) {
hcsm()->SetWebsiteSettingCustomScope(
primary_pattern, secondary_pattern,
ContentSettingsType::REVOKED_UNUSED_SITE_PERMISSIONS, {});
}
base::OnceCallback<std::unique_ptr<SafetyHubService::Result>()>
RevokedPermissionsService::GetBackgroundTask() {
return base::BindOnce(&RevokedPermissionsService::UpdateOnBackgroundThread,
clock_, base::WrapRefCounted(hcsm()));
}
std::unique_ptr<SafetyHubService::Result>
RevokedPermissionsService::UpdateOnBackgroundThread(
base::Clock* clock,
const scoped_refptr<HostContentSettingsMap> hcsm) {
RevokedPermissionsService::UnusedPermissionMap recently_unused;
const base::Time threshold =
clock->Now() - content_settings::GetCoarseVisitedTimePrecision();
auto* website_setting_registry =
content_settings::WebsiteSettingsRegistry::GetInstance();
for (const content_settings::WebsiteSettingsInfo* info :
*website_setting_registry) {
ContentSettingsType type = info->type();
if (!IsContentSetting(type) && IsWebsiteSetting(type) &&
!IsChooserPermissionSupported()) {
continue;
}
if (!content_settings::CanTrackLastVisit(type)) {
continue;
}
ContentSettingsForOneType settings = hcsm->GetSettingsForOneType(type);
for (const auto& setting : settings) {
// Skip wildcard patterns that don't belong to a single origin. These
// shouldn't track visit timestamps.
if (!setting.primary_pattern.MatchesSingleOrigin()) {
continue;
}
if (setting.metadata.last_visited() != base::Time() &&
setting.metadata.last_visited() < threshold) {
// Converting a primary pattern to an origin is normally an anti-pattern
// but here it is ok since the primary pattern belongs to a single
// origin. Therefore, it has a fully defined URL+scheme+port which makes
// converting primary pattern to origin successful.
url::Origin origin =
ConvertPrimaryPatternToOrigin(setting.primary_pattern);
recently_unused[origin.Serialize()].push_back(
{type, std::move(setting)});
}
}
}
auto result =
std::make_unique<RevokedPermissionsService::RevokedPermissionsResult>();
result->SetRecentlyUnusedPermissions(recently_unused);
return std::move(result);
}
std::unique_ptr<SafetyHubService::Result>
RevokedPermissionsService::UpdateOnUIThread(
std::unique_ptr<SafetyHubService::Result> result) {
auto* interim_result =
static_cast<RevokedPermissionsService::RevokedPermissionsResult*>(
result.get());
recently_unused_permissions_ = interim_result->GetRecentlyUnusedPermissions();
if (IsUnusedSiteAutoRevocationEnabled()) {
RevokeUnusedPermissions();
if (disruptive_notification_manager_) {
disruptive_notification_manager_->RevokeDisruptiveNotifications();
}
}
if (IsAbusiveNotificationAutoRevocationEnabled()) {
abusive_notification_manager_->CheckNotificationPermissionOrigins();
}
return GetRevokedPermissions();
}
std::unique_ptr<RevokedPermissionsService::RevokedPermissionsResult>
RevokedPermissionsService::GetRevokedPermissions() {
ContentSettingsForOneType settings = hcsm()->GetSettingsForOneType(
ContentSettingsType::REVOKED_UNUSED_SITE_PERMISSIONS);
auto result =
std::make_unique<RevokedPermissionsService::RevokedPermissionsResult>();
for (const auto& revoked_permissions : settings) {
PermissionsData permissions_data;
permissions_data.primary_pattern = revoked_permissions.primary_pattern;
const base::Value& stored_value = revoked_permissions.setting_value;
DCHECK(stored_value.is_dict());
const base::Value::List* type_list =
stored_value.GetDict().FindList(permissions::kRevokedKey);
CHECK(type_list);
for (const base::Value& type_value : *type_list) {
// To avoid crashes for unknown types skip integer values.
if (type_value.is_int()) {
continue;
}
ContentSettingsType type =
ConvertKeyToContentSettingsType(type_value.GetString());
permissions_data.permission_types.insert(type);
}
permissions_data.constraints = content_settings::ContentSettingConstraints(
revoked_permissions.metadata.expiration() -
revoked_permissions.metadata.lifetime());
permissions_data.constraints.set_lifetime(
revoked_permissions.metadata.lifetime());
auto* chooser_permissions_data_dict = stored_value.GetDict().FindDict(
permissions::kRevokedChooserPermissionsKey);
if (chooser_permissions_data_dict) {
permissions_data.chooser_permissions_data =
chooser_permissions_data_dict->Clone();
}
// If the origin has a revoked notification, add `NOTIFICATIONS` to
// the list of revoked permissions.
const GURL& url = GURL(revoked_permissions.primary_pattern.ToString());
if (safety_hub_util::IsUrlRevokedAbusiveNotification(hcsm(), url)) {
DCHECK(IsAbusiveNotificationAutoRevocationEnabled());
permissions_data.permission_types.insert(
static_cast<ContentSettingsType>(ContentSettingsType::NOTIFICATIONS));
// Update `constraints` to one with the latest expiration.
content_settings::SettingInfo info;
base::Value stored_abusive_value(hcsm()->GetWebsiteSetting(
url, url,
ContentSettingsType::REVOKED_ABUSIVE_NOTIFICATION_PERMISSIONS,
&info));
CHECK(!stored_abusive_value.is_none());
if (revoked_permissions.metadata.expiration() <
info.metadata.expiration()) {
permissions_data.constraints = GetConstraintFromInfo(info);
}
permissions_data.revocation_type =
PermissionsRevocationType::kUnusedPermissionsAndAbusiveNotifications;
} else if (DisruptiveNotificationPermissionsManager::
IsUrlRevokedDisruptiveNotification(hcsm(), url)) {
// If the origin has a revoked disruptive notification, add
// `NOTIFICATIONS` to the list of revoked permissions.
CHECK(disruptive_notification_manager_);
permissions_data.permission_types.insert(
static_cast<ContentSettingsType>(ContentSettingsType::NOTIFICATIONS));
// Update `constraints` to one with the latest expiration.
content_settings::SettingInfo info;
base::Value stored_disruptive_value(hcsm()->GetWebsiteSetting(
url, url,
ContentSettingsType::REVOKED_DISRUPTIVE_NOTIFICATION_PERMISSIONS,
&info));
CHECK(!stored_disruptive_value.is_none());
if (revoked_permissions.metadata.expiration() <
info.metadata.expiration()) {
permissions_data.constraints = GetConstraintFromInfo(info);
}
permissions_data.revocation_type = PermissionsRevocationType::
kUnusedPermissionsAndDisruptiveNotifications;
} else {
permissions_data.revocation_type =
PermissionsRevocationType::kUnusedPermissions;
}
result->AddRevokedPermission(permissions_data);
}
ContentSettingsForOneType revoked_abusive_notification_settings =
safety_hub_util::GetRevokedAbusiveNotificationPermissions(hcsm());
for (const auto& revoked_abusive_notification_permission :
revoked_abusive_notification_settings) {
// Skip origins with revoked unused site permissions, since these were
// handled above.
if (safety_hub_util::IsUrlRevokedUnusedSite(
hcsm(), GURL(revoked_abusive_notification_permission.primary_pattern
.ToString()))) {
continue;
}
PermissionsData permissions_data;
permissions_data.primary_pattern =
revoked_abusive_notification_permission.primary_pattern;
permissions_data.permission_types.insert(
static_cast<ContentSettingsType>(ContentSettingsType::NOTIFICATIONS));
permissions_data.constraints = content_settings::ContentSettingConstraints(
revoked_abusive_notification_permission.metadata.expiration() -
revoked_abusive_notification_permission.metadata.lifetime());
permissions_data.constraints.set_lifetime(
revoked_abusive_notification_permission.metadata.lifetime());
permissions_data.revocation_type =
PermissionsRevocationType::kAbusiveNotificationPermissions;
result->AddRevokedPermission(permissions_data);
}
if (disruptive_notification_manager_) {
ContentSettingsForOneType revoked_disruptive_notifications =
disruptive_notification_manager_->GetRevokedNotifications();
for (const auto& permission : revoked_disruptive_notifications) {
// Skip origins with revoked unused site permissions, since these were
// handled above.
if (safety_hub_util::IsUrlRevokedUnusedSite(
hcsm(), GURL(permission.primary_pattern.ToString()))) {
continue;
}
CHECK(!safety_hub_util::IsUrlRevokedAbusiveNotification(
hcsm(), GURL(permission.primary_pattern.ToString())));
PermissionsData permissions_data;
permissions_data.primary_pattern = permission.primary_pattern;
permissions_data.permission_types.insert(
static_cast<ContentSettingsType>(ContentSettingsType::NOTIFICATIONS));
permissions_data.constraints =
content_settings::ContentSettingConstraints(
permission.metadata.expiration() -
permission.metadata.lifetime());
permissions_data.constraints.set_lifetime(permission.metadata.lifetime());
permissions_data.revocation_type =
PermissionsRevocationType::kDisruptiveNotificationPermissions;
result->AddRevokedPermission(permissions_data);
}
}
return result;
}
void RevokedPermissionsService::RevokeUnusedPermissions() {
CHECK(IsUnusedSiteAutoRevocationEnabled());
// Set this to true to prevent `OnContentSettingChanged` from removing
// revoked setting values during auto-revocation.
is_unused_site_revocation_running = true;
base::Time threshold = clock_->Now() - GetRevocationThreshold();
for (auto itr = recently_unused_permissions_.begin();
itr != recently_unused_permissions_.end();) {
std::list<ContentSettingEntry>& unused_site_permissions = itr->second;
// All |primary_pattern|s are equal across list items, the same is true for
// |secondary_pattern|s. This property is needed later and checked in the
// loop.
ContentSettingsPattern primary_pattern =
unused_site_permissions.front().source.primary_pattern;
ContentSettingsPattern secondary_pattern =
unused_site_permissions.front().source.secondary_pattern;
std::set<ContentSettingsType> revoked_permissions;
base::Value::Dict chooser_permissions_data;
for (auto permission_itr = unused_site_permissions.begin();
permission_itr != unused_site_permissions.end();) {
const ContentSettingEntry& entry = *permission_itr;
// Check if the current permission can be auto revoked.
if (!content_settings::CanBeAutoRevoked(entry.type,
entry.source.setting_value)) {
permission_itr++;
continue;
}
DCHECK_EQ(entry.source.primary_pattern, primary_pattern);
DCHECK(entry.source.secondary_pattern ==
ContentSettingsPattern::Wildcard() ||
entry.source.secondary_pattern == entry.source.primary_pattern);
// Reset the permission to default if the site is visited before
// threshold. Also, the secondary pattern should be wildcard.
DCHECK_NE(entry.source.metadata.last_visited(), base::Time());
DCHECK(entry.type != ContentSettingsType::NOTIFICATIONS);
if (entry.source.metadata.last_visited() < threshold &&
entry.source.secondary_pattern ==
ContentSettingsPattern::Wildcard()) {
permissions::PermissionUmaUtil::ScopedRevocationReporter reporter(
browser_context_.get(), entry.source.primary_pattern,
entry.source.secondary_pattern, entry.type,
permissions::PermissionSourceUI::SAFETY_HUB_AUTO_REVOCATION);
// Record the number of permissions auto-revoked per permission type.
content_settings_uma_util::RecordContentSettingsHistogram(
"Settings.SafetyHub.UnusedSitePermissionsModule.AutoRevoked2",
entry.type);
revoked_permissions.insert(entry.type);
if (IsContentSetting(entry.type)) {
hcsm()->SetContentSettingCustomScope(
entry.source.primary_pattern, entry.source.secondary_pattern,
entry.type, ContentSetting::CONTENT_SETTING_DEFAULT);
} else if (IsChooserPermissionSupported() &&
IsWebsiteSetting(entry.type)) {
chooser_permissions_data.Set(
ConvertContentSettingsTypeToKey(entry.type),
entry.source.setting_value.Clone());
hcsm()->SetWebsiteSettingCustomScope(entry.source.primary_pattern,
entry.source.secondary_pattern,
entry.type, base::Value());
} else {
NOTREACHED()
<< "Unable to find ContentSettingsType in neither "
<< "ContentSettingsRegistry nor WebsiteSettingsRegistry: "
<< ConvertContentSettingsTypeToKey(entry.type);
}
unused_site_permissions.erase(permission_itr++);
} else {
permission_itr++;
}
}
// Store revoked permissions on HCSM.
if (!revoked_permissions.empty()) {
StorePermissionInUnusedSitePermissionSetting(
revoked_permissions, chooser_permissions_data, std::nullopt,
primary_pattern, secondary_pattern);
}
// Handle clean up of recently_unused_permissions_ map after revocation.
if (unused_site_permissions.empty()) {
// Since all unused permissions are revoked, the map should be cleared.
recently_unused_permissions_.erase(itr++);
} else {
// Since there are some permissions that are not revoked, the tracked
// unused permissions should be set to those permissions.
// Note that, currently all permissions belong to a single domain will
// revoked all together, since triggering permission prompt requires a
// page visit. So the timestamp of all granted permissions of the origin
// will be updated. However, this logic will prevent edge cases like
// permission prompt stays open long time, also will provide support for
// revoking permissions separately in the future.
itr++;
}
}
// Set this back to false, so that `OnContentSettingChanged` can cleanup
// revoked settings if necessary.
is_unused_site_revocation_running = false;
}
void RevokedPermissionsService::RestoreDeletedRevokedPermissionsList(
const std::vector<PermissionsData>& permissions_data_list) {
for (const auto& permissions_data : permissions_data_list) {
if (IsUnusedPermissionRevocation(permissions_data.revocation_type)) {
StorePermissionInUnusedSitePermissionSetting(
permissions_data.permission_types,
permissions_data.chooser_permissions_data,
permissions_data.constraints.Clone(),
permissions_data.primary_pattern, ContentSettingsPattern::Wildcard());
}
if (IsAbusiveNotificationAutoRevocationEnabled() &&
IsAbusiveNotificationPermissionRevocation(
permissions_data.revocation_type)) {
abusive_notification_manager_->RestoreDeletedRevokedPermission(
permissions_data.primary_pattern,
permissions_data.constraints.Clone());
}
if (disruptive_notification_manager_ &&
IsDisruptiveNotificationPermissionRevocation(
permissions_data.revocation_type)) {
disruptive_notification_manager_->RestoreDeletedRevokedPermission(
permissions_data.primary_pattern,
permissions_data.constraints.Clone());
}
}
}
void RevokedPermissionsService::StorePermissionInUnusedSitePermissionSetting(
const std::set<ContentSettingsType>& permissions,
const base::Value::Dict& chooser_permissions_data,
const std::optional<content_settings::ContentSettingConstraints> constraint,
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern) {
// This method only pertains to permissions other than `NOTIFICATIONS`, since
// these permissions are not revoked for unused sites.
const std::set<ContentSettingsType>& unused_site_permission_types =
GetRevokedUnusedSitePermissionTypes(permissions);
GURL url = GURL(primary_pattern.ToString());
// The url should be valid as it is checked that the pattern represents a
// single origin.
DCHECK(url.is_valid());
// Get the current value of the setting to append the recently revoked
// permissions.
base::Value cur_value(hcsm()->GetWebsiteSetting(
url, url, ContentSettingsType::REVOKED_UNUSED_SITE_PERMISSIONS));
base::Value::Dict dict = cur_value.is_dict() ? std::move(cur_value.GetDict())
: base::Value::Dict();
base::Value::List permission_type_list =
dict.FindList(permissions::kRevokedKey)
? std::move(*dict.FindList(permissions::kRevokedKey))
: base::Value::List();
for (const auto& permission : unused_site_permission_types) {
// Chooser permissions (not ContentSettingsRegistry-based) should have
// corresponding data to be restored in `chooser_permissions_data`.
DCHECK(IsContentSetting(permission) || !IsChooserPermissionSupported() ||
chooser_permissions_data.contains(
ConvertContentSettingsTypeToKey(permission)));
permission_type_list.Append(ConvertContentSettingsTypeToKey(permission));
}
dict.Set(permissions::kRevokedKey,
base::Value::List(std::move(permission_type_list)));
if (IsChooserPermissionSupported() && !chooser_permissions_data.empty()) {
base::Value::Dict existing_chooser_permissions_data =
dict.FindDict(permissions::kRevokedChooserPermissionsKey)
? std::move(
*dict.FindDict(permissions::kRevokedChooserPermissionsKey))
: base::Value::Dict();
for (auto data : chooser_permissions_data) {
// Chooser permissions data should have its permission type included in
// `permissions` set.
DCHECK(permissions.contains(ConvertKeyToContentSettingsType(data.first)));
existing_chooser_permissions_data.Set(data.first, data.second.Clone());
}
dict.Set(permissions::kRevokedChooserPermissionsKey,
base::Value::Dict(std::move(existing_chooser_permissions_data)));
}
content_settings::ContentSettingConstraints default_constraint(clock_->Now());
default_constraint.set_lifetime(safety_hub_util::GetCleanUpThreshold());
// Set website setting for the list of recently revoked permissions and
// previously revoked permissions, if exists.
hcsm()->SetWebsiteSettingCustomScope(
primary_pattern, secondary_pattern,
ContentSettingsType::REVOKED_UNUSED_SITE_PERMISSIONS,
base::Value(std::move(dict)),
constraint.has_value() ? constraint.value() : default_constraint);
}
void RevokedPermissionsService::OnPermissionsAutorevocationControlChanged() {
// TODO(crbug.com/40250875): Clean up these checks.
if (IsUnusedSiteAutoRevocationEnabled() ||
IsAbusiveNotificationAutoRevocationEnabled()) {
StartRepeatedUpdates();
} else {
StopTimer();
}
}
std::vector<RevokedPermissionsService::ContentSettingEntry>
RevokedPermissionsService::GetTrackedUnusedPermissionsForTesting() {
std::vector<ContentSettingEntry> result;
for (const auto& list : recently_unused_permissions_) {
for (const auto& entry : list.second) {
result.push_back(entry);
}
}
return result;
}
void RevokedPermissionsService::SetClockForTesting(base::Clock* clock) {
clock_ = clock;
if (disruptive_notification_manager_) {
disruptive_notification_manager_->SetClockForTesting(clock); // IN-TEST
}
if (IsAbusiveNotificationAutoRevocationEnabled()) {
abusive_notification_manager_->SetClockForTesting(clock); // IN-TEST
}
}
base::WeakPtr<SafetyHubService> RevokedPermissionsService::GetAsWeakRef() {
return weak_factory_.GetWeakPtr();
}
bool RevokedPermissionsService::IsUnusedSiteAutoRevocationEnabled() {
#if BUILDFLAG(IS_ANDROID)
if (!base::FeatureList::IsEnabled(features::kSafetyHub)) {
return false;
}
#endif // BUILDFLAG(IS_ANDROID)
return pref_change_registrar_->prefs()->GetBoolean(
safety_hub_prefs::kUnusedSitePermissionsRevocationEnabled);
}
bool RevokedPermissionsService::IsAbusiveNotificationAutoRevocationEnabled() {
return safe_browsing::IsSafeBrowsingEnabled(*pref_change_registrar_->prefs());
}
const std::set<ContentSettingsType>
RevokedPermissionsService::GetRevokedUnusedSitePermissionTypes(
const std::set<ContentSettingsType> permissions) {
std::set<ContentSettingsType>
permissions_without_revoked_abusive_notification_manager = permissions;
if (permissions_without_revoked_abusive_notification_manager.contains(
ContentSettingsType::NOTIFICATIONS)) {
permissions_without_revoked_abusive_notification_manager.erase(
ContentSettingsType::NOTIFICATIONS);
}
return permissions_without_revoked_abusive_notification_manager;
}
void RevokedPermissionsService::UpdateIntegerValuesToGroupName() {
ContentSettingsForOneType settings = hcsm()->GetSettingsForOneType(
ContentSettingsType::REVOKED_UNUSED_SITE_PERMISSIONS);
bool successful_migration = true;
for (const auto& revoked_permissions : settings) {
const base::Value& stored_value = revoked_permissions.setting_value;
DCHECK(stored_value.is_dict());
base::Value updated_dict(stored_value.Clone());
const base::Value::List* permission_value_list =
stored_value.GetDict().FindList(permissions::kRevokedKey);
if (permission_value_list) {
base::Value::List updated_permission_value_list =
ConvertContentSettingsIntValuesToString(
permission_value_list->Clone(), &successful_migration);
updated_dict.GetDict().Set(permissions::kRevokedKey,
std::move(updated_permission_value_list));
}
const base::Value::Dict* chooser_permission_value_dict =
stored_value.GetDict().FindDict(
permissions::kRevokedChooserPermissionsKey);
if (chooser_permission_value_dict) {
base::Value::Dict updated_chooser_permission_value_dict =
ConvertChooserContentSettingsIntValuesToString(
chooser_permission_value_dict->Clone());
updated_dict.GetDict().Set(
permissions::kRevokedChooserPermissionsKey,
std::move(updated_chooser_permission_value_dict));
}
// Create a new constraint with the old creation time of the original
// exception.
base::Time creation_time = revoked_permissions.metadata.expiration() -
revoked_permissions.metadata.lifetime();
content_settings::ContentSettingConstraints constraints(creation_time);
constraints.set_lifetime(revoked_permissions.metadata.lifetime());
hcsm()->SetWebsiteSettingCustomScope(
revoked_permissions.primary_pattern,
revoked_permissions.secondary_pattern,
ContentSettingsType::REVOKED_UNUSED_SITE_PERMISSIONS,
std::move(updated_dict), constraints);
}
if (successful_migration) {
pref_change_registrar_->prefs()->SetBoolean(
safety_hub_prefs::kUnusedSitePermissionsRevocationMigrationCompleted,
true);
}
}
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