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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/safe_browsing/core/browser/db/database_manager.h"
#include <memory>
#include <utility>
#include "base/functional/bind.h"
#include "base/metrics/histogram_macros.h"
#include "base/task/sequenced_task_runner.h"
#include "components/safe_browsing/core/browser/db/v4_get_hash_protocol_manager.h"
#include "components/safe_browsing/core/browser/db/v4_protocol_manager_util.h"
#include "components/safe_browsing/core/common/features.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
#include "url/gurl.h"
namespace safe_browsing {
SafeBrowsingDatabaseManager::Client::Client(base::PassKey<Client> pass_key) {}
SafeBrowsingDatabaseManager::Client::~Client() = default;
base::WeakPtr<SafeBrowsingDatabaseManager::Client>
SafeBrowsingDatabaseManager::Client::GetWeakPtr() {
return weak_factory_.GetWeakPtr();
}
base::PassKey<SafeBrowsingDatabaseManager::Client>
SafeBrowsingDatabaseManager::Client::GetPassKeyForTesting() {
return base::PassKey<Client>();
}
base::PassKey<SafeBrowsingDatabaseManager::Client>
SafeBrowsingDatabaseManager::Client::GetPassKey() {
return base::PassKey<Client>();
}
SafeBrowsingDatabaseManager::SafeBrowsingDatabaseManager(
scoped_refptr<base::SequencedTaskRunner> ui_task_runner)
: base::RefCountedDeleteOnSequence<SafeBrowsingDatabaseManager>(
std::move(ui_task_runner)) {}
SafeBrowsingDatabaseManager::~SafeBrowsingDatabaseManager() {
DCHECK(!v4_get_hash_protocol_manager_);
}
bool SafeBrowsingDatabaseManager::CancelApiCheck(Client* client) {
DCHECK(ui_task_runner()->RunsTasksInCurrentSequence());
auto it = FindClientApiCheck(client);
if (it != api_checks_.end()) {
api_checks_.erase(it);
return true;
}
NOTREACHED();
}
bool SafeBrowsingDatabaseManager::CheckApiBlocklistUrl(const GURL& url,
Client* client) {
DCHECK(ui_task_runner()->RunsTasksInCurrentSequence());
// Make sure we can check this url and that the service is enabled.
if (!IsDatabaseReady() ||
!(url.SchemeIs(url::kHttpScheme) || url.SchemeIs(url::kHttpsScheme))) {
return true;
}
// There can only be one in-progress check for the same client at a time.
DCHECK(FindClientApiCheck(client) == api_checks_.end());
std::unique_ptr<SafeBrowsingApiCheck> check(
new SafeBrowsingApiCheck(url, client));
api_checks_.insert(check.get());
std::vector<std::string> list_client_states;
V4ProtocolManagerUtil::GetListClientStatesFromStoreStateMap(
GetStoreStateMap(), &list_client_states);
v4_get_hash_protocol_manager_->GetFullHashesWithApis(
url, list_client_states,
base::BindOnce(&SafeBrowsingDatabaseManager::OnThreatMetadataResponse,
base::Unretained(this), std::move(check)));
return false;
}
SafeBrowsingDatabaseManager::ApiCheckSet::iterator
SafeBrowsingDatabaseManager::FindClientApiCheck(Client* client) {
DCHECK(ui_task_runner()->RunsTasksInCurrentSequence());
for (auto it = api_checks_.begin(); it != api_checks_.end(); ++it) {
if ((*it)->client() == client) {
return it;
}
}
return api_checks_.end();
}
// Keep the list returned here in sync with GetStoreStateMap()
StoresToCheck SafeBrowsingDatabaseManager::GetStoresForFullHashRequests() {
return StoresToCheck({GetChromeUrlApiId()});
}
// Keep the list returned here in sync with GetStoresForFullHashRequests()
std::unique_ptr<StoreStateMap> SafeBrowsingDatabaseManager::GetStoreStateMap() {
// This implementation is currently used only for RemoteDatabaseManager which
// only requests full hashes for GetChromeUrlApiId() list that has no local
// storage so the client state is always empty.
auto store_state_map = std::make_unique<StoreStateMap>();
(*store_state_map)[GetChromeUrlApiId()] = "";
return store_state_map;
}
void SafeBrowsingDatabaseManager::OnThreatMetadataResponse(
std::unique_ptr<SafeBrowsingApiCheck> check,
const ThreatMetadata& md) {
DCHECK(ui_task_runner()->RunsTasksInCurrentSequence());
DCHECK(check);
// If the check is not in |api_checks_| then the request was cancelled by the
// client.
auto it = api_checks_.find(check.get());
if (it == api_checks_.end())
return;
check->client()->OnCheckApiBlocklistUrlResult(check->url(), md);
api_checks_.erase(it);
}
void SafeBrowsingDatabaseManager::StartOnUIThread(
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
const V4ProtocolConfig& config) {
DCHECK(ui_task_runner()->RunsTasksInCurrentSequence());
v4_get_hash_protocol_manager_ = V4GetHashProtocolManager::Create(
url_loader_factory, GetStoresForFullHashRequests(), config);
}
// |shutdown| not used. Destroys the v4 protocol managers. This may be called
// multiple times during the life of the DatabaseManager.
void SafeBrowsingDatabaseManager::StopOnUIThread(bool shutdown) {
DCHECK(ui_task_runner()->RunsTasksInCurrentSequence());
// Delete pending checks, calling back any clients with empty metadata.
for (const SafeBrowsingApiCheck* check : api_checks_) {
if (check->client()) {
check->client()->OnCheckApiBlocklistUrlResult(check->url(),
ThreatMetadata());
}
}
// This cancels all in-flight GetHash requests.
v4_get_hash_protocol_manager_.reset();
}
base::CallbackListSubscription
SafeBrowsingDatabaseManager::RegisterDatabaseUpdatedCallback(
const OnDatabaseUpdated& cb) {
return update_complete_callback_list_.Add(cb);
}
void SafeBrowsingDatabaseManager::NotifyDatabaseUpdateFinished() {
DCHECK(ui_task_runner()->RunsTasksInCurrentSequence());
update_complete_callback_list_.Notify();
}
SafeBrowsingDatabaseManager::SafeBrowsingApiCheck::SafeBrowsingApiCheck(
const GURL& url,
Client* client)
: url_(url), client_(client) {}
} // namespace safe_browsing
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