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// Copyright 2020 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/permissions/permission_revocation_request.h"
#include "base/task/sequenced_task_runner.h"
#include "base/time/default_clock.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/content_settings/host_content_settings_map_factory.h"
#include "chrome/browser/permissions/notifications_permission_revocation_config.h"
#include "chrome/browser/permissions/permission_manager_factory.h"
#include "chrome/browser/profiles/profile.h"
#include "components/content_settings/core/browser/host_content_settings_map.h"
#include "components/permissions/constants.h"
#include "components/permissions/permission_manager.h"
#include "components/permissions/permission_uma_util.h"
#include "components/permissions/permissions_client.h"
#include "components/prefs/pref_service.h"
#include "components/safe_browsing/core/browser/db/database_manager.h"
#include "components/safe_browsing/core/common/safe_browsing_prefs.h"
#if BUILDFLAG(SAFE_BROWSING_AVAILABLE)
#include "chrome/browser/safe_browsing/safe_browsing_service.h"
#endif
namespace {
constexpr char kExcludedKey[] = "exempted";
constexpr char kPermissionName[] = "notifications";
struct OriginStatus {
bool is_exempt_from_future_revocations = false;
bool has_been_previously_revoked = false;
};
OriginStatus GetOriginStatus(Profile* profile, const GURL& origin) {
const base::Value stored_value =
permissions::PermissionsClient::Get()
->GetSettingsMap(profile)
->GetWebsiteSetting(
origin, GURL(),
ContentSettingsType::PERMISSION_AUTOREVOCATION_DATA);
OriginStatus status;
if (!stored_value.is_dict())
return status;
const base::Value::Dict* dict =
stored_value.GetDict().FindDict(kPermissionName);
if (!dict)
return status;
if (dict->FindBool(kExcludedKey).has_value()) {
status.is_exempt_from_future_revocations =
dict->FindBool(kExcludedKey).value();
}
if (dict->FindBool(permissions::kRevokedKey).has_value()) {
status.has_been_previously_revoked =
dict->FindBool(permissions::kRevokedKey).value();
}
return status;
}
void SetOriginStatus(Profile* profile,
const GURL& origin,
const OriginStatus& status) {
base::Value::Dict dict;
base::Value::Dict permission_dict;
permission_dict.Set(kExcludedKey, status.is_exempt_from_future_revocations);
permission_dict.Set(permissions::kRevokedKey,
status.has_been_previously_revoked);
dict.Set(kPermissionName, std::move(permission_dict));
permissions::PermissionsClient::Get()
->GetSettingsMap(profile)
->SetWebsiteSettingDefaultScope(
origin, GURL(), ContentSettingsType::PERMISSION_AUTOREVOCATION_DATA,
base::Value(std::move(dict)));
}
#if BUILDFLAG(SAFE_BROWSING_AVAILABLE)
void RevokePermission(const GURL& origin, Profile* profile) {
permissions::PermissionsClient::Get()
->GetSettingsMap(profile)
->SetContentSettingDefaultScope(origin, GURL(),
ContentSettingsType::NOTIFICATIONS,
ContentSetting::CONTENT_SETTING_DEFAULT);
OriginStatus status = GetOriginStatus(profile, origin);
status.has_been_previously_revoked = true;
SetOriginStatus(profile, origin, status);
permissions::PermissionUmaUtil::PermissionRevoked(
ContentSettingsType::NOTIFICATIONS,
permissions::PermissionSourceUI::AUTO_REVOCATION, origin, profile);
}
#endif
} // namespace
PermissionRevocationRequest::PermissionRevocationRequest(
Profile* profile,
const GURL& origin,
OutcomeCallback callback)
: profile_(profile), origin_(origin), callback_(std::move(callback)) {
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(&PermissionRevocationRequest::CheckAndRevokeIfBlocklisted,
weak_factory_.GetWeakPtr()));
}
PermissionRevocationRequest::~PermissionRevocationRequest() = default;
// static
void PermissionRevocationRequest::ExemptOriginFromFutureRevocations(
Profile* profile,
const GURL& origin) {
OriginStatus status = GetOriginStatus(profile, origin);
status.is_exempt_from_future_revocations = true;
SetOriginStatus(profile, origin, status);
}
// static
bool PermissionRevocationRequest::IsOriginExemptedFromFutureRevocations(
Profile* profile,
const GURL& origin) {
OriginStatus status = GetOriginStatus(profile, origin);
return status.is_exempt_from_future_revocations;
}
// static
bool PermissionRevocationRequest::HasPreviouslyRevokedPermission(
Profile* profile,
const GURL& origin) {
OriginStatus status = GetOriginStatus(profile, origin);
return status.has_been_previously_revoked;
}
void PermissionRevocationRequest::CheckAndRevokeIfBlocklisted() {
DCHECK(profile_);
DCHECK(callback_);
#if BUILDFLAG(SAFE_BROWSING_AVAILABLE)
if (!safe_browsing::IsSafeBrowsingEnabled(*profile_->GetPrefs()) ||
IsOriginExemptedFromFutureRevocations(profile_, origin_)){
NotifyCallback(Outcome::PERMISSION_NOT_REVOKED);
return;
}
CrowdDenyPreloadData* crowd_deny = CrowdDenyPreloadData::GetInstance();
permissions::PermissionUmaUtil::RecordCrowdDenyVersionAtAbuseCheckTime(
crowd_deny->version_on_disk());
if (!crowd_deny->IsReadyToUse())
crowd_deny_request_start_time_ = base::TimeTicks::Now();
crowd_deny->GetReputationDataForSiteAsync(
url::Origin::Create(origin_),
base::BindOnce(&PermissionRevocationRequest::OnSiteReputationReady,
weak_factory_.GetWeakPtr()));
#else
NotifyCallback(Outcome::PERMISSION_NOT_REVOKED);
#endif
}
#if BUILDFLAG(SAFE_BROWSING_AVAILABLE)
void PermissionRevocationRequest::OnSiteReputationReady(
const CrowdDenyPreloadData::SiteReputation* site_reputation) {
if (crowd_deny_request_start_time_.has_value()) {
crowd_deny_request_duration_ =
base::TimeTicks::Now() - crowd_deny_request_start_time_.value();
}
if (site_reputation && !site_reputation->warning_only()) {
bool should_revoke_permission = false;
switch (site_reputation->notification_ux_quality()) {
case CrowdDenyPreloadData::SiteReputation::ABUSIVE_PROMPTS:
case CrowdDenyPreloadData::SiteReputation::ABUSIVE_CONTENT:
should_revoke_permission = NotificationsPermissionRevocationConfig::
IsAbusiveOriginPermissionRevocationEnabled();
break;
case CrowdDenyPreloadData::SiteReputation::DISRUPTIVE_BEHAVIOR:
should_revoke_permission = true;
break;
default:
should_revoke_permission = false;
}
DCHECK(g_browser_process->safe_browsing_service());
if (should_revoke_permission &&
g_browser_process->safe_browsing_service()) {
safe_browsing_request_.emplace(
g_browser_process->safe_browsing_service()->database_manager(),
base::DefaultClock::GetInstance(), url::Origin::Create(origin_),
base::BindOnce(
&PermissionRevocationRequest::OnSafeBrowsingVerdictReceived,
weak_factory_.GetWeakPtr(), site_reputation));
return;
}
}
NotifyCallback(Outcome::PERMISSION_NOT_REVOKED);
}
void PermissionRevocationRequest::OnSafeBrowsingVerdictReceived(
const CrowdDenyPreloadData::SiteReputation* site_reputation,
CrowdDenySafeBrowsingRequest::Verdict verdict) {
DCHECK(safe_browsing_request_);
DCHECK(profile_);
DCHECK(callback_);
if (verdict == CrowdDenySafeBrowsingRequest::Verdict::kUnacceptable) {
RevokePermission(origin_, profile_);
if (site_reputation->notification_ux_quality() ==
CrowdDenyPreloadData::SiteReputation::ABUSIVE_PROMPTS ||
site_reputation->notification_ux_quality() ==
CrowdDenyPreloadData::SiteReputation::ABUSIVE_CONTENT) {
NotifyCallback(Outcome::PERMISSION_REVOKED_DUE_TO_ABUSE);
} else if (site_reputation->notification_ux_quality() ==
CrowdDenyPreloadData::SiteReputation::DISRUPTIVE_BEHAVIOR) {
NotifyCallback(Outcome::PERMISSION_REVOKED_DUE_TO_DISRUPTIVE_BEHAVIOR);
}
} else {
NotifyCallback(Outcome::PERMISSION_NOT_REVOKED);
}
}
#endif
void PermissionRevocationRequest::NotifyCallback(Outcome outcome) {
if (outcome == Outcome::PERMISSION_NOT_REVOKED &&
crowd_deny_request_duration_.has_value()) {
permissions::PermissionUmaUtil::RecordCrowdDenyDelayedPushNotification(
crowd_deny_request_duration_.value());
}
std::move(callback_).Run(outcome);
}
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