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// Copyright 2019 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/crowd_deny_preload_data.h"
#include <string>
#include <utility>
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/location.h"
#include "base/no_destructor.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/thread_pool.h"
#include "components/permissions/permission_uma_util.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
#include "url/gurl.h"
#include "url/origin.h"
#include "url/url_constants.h"
namespace {
using DomainToReputationMap = CrowdDenyPreloadData::DomainToReputationMap;
// Attempts to load the preload data from |proto_path|, parse it as a serialized
// chrome_browser_crowd_deny::PreloadData message, and index it by domain.
// Returns an empty map is anything goes wrong.
DomainToReputationMap LoadAndParseAndIndexPreloadDataFromDisk(
const base::FilePath& proto_path) {
std::string binary_proto;
if (!base::ReadFileToString(proto_path, &binary_proto))
return {};
CrowdDenyPreloadData::PreloadData preload_data;
if (!preload_data.ParseFromString(binary_proto))
return {};
std::vector<DomainToReputationMap::value_type> domain_reputation_pairs;
domain_reputation_pairs.reserve(preload_data.site_reputations_size());
for (const auto& site_reputation : preload_data.site_reputations()) {
domain_reputation_pairs.emplace_back(site_reputation.domain(),
site_reputation);
}
return DomainToReputationMap(std::move(domain_reputation_pairs));
}
PendingOrigin::PendingOrigin(
url::Origin origin,
base::OnceCallback<void(const chrome_browser_crowd_deny::SiteReputation*)>
callback)
: origin(std::move(origin)), callback(std::move(callback)) {}
PendingOrigin::~PendingOrigin() = default;
} // namespace
CrowdDenyPreloadData::CrowdDenyPreloadData() {
loading_task_runner_ = base::ThreadPool::CreateSequencedTaskRunner(
{base::MayBlock(), base::TaskPriority::USER_VISIBLE});
}
CrowdDenyPreloadData::~CrowdDenyPreloadData() = default;
// static
CrowdDenyPreloadData* CrowdDenyPreloadData::GetInstance() {
static base::NoDestructor<CrowdDenyPreloadData> instance;
return instance.get();
}
void CrowdDenyPreloadData::GetReputationDataForSiteAsync(
const url::Origin& origin,
SiteReputationCallback callback) {
if (is_ready_to_use_) {
std::move(callback).Run(GetReputationDataForSite(origin));
} else {
origins_pending_verification_.emplace(origin, std::move(callback));
}
}
void CrowdDenyPreloadData::LoadFromDisk(const base::FilePath& proto_path,
const base::Version& version) {
version_on_disk_ = version;
is_ready_to_use_ = false;
// On failure, LoadAndParseAndIndexPreloadDataFromDisk will return an empty
// map. Replace the in-memory state with that regardless, so that the stale
// old data will no longer be used.
loading_task_runner_->PostTaskAndReplyWithResult(
FROM_HERE,
base::BindOnce(&LoadAndParseAndIndexPreloadDataFromDisk, proto_path),
base::BindOnce(&CrowdDenyPreloadData::SetSiteReputations,
weak_factory_.GetWeakPtr()));
}
const CrowdDenyPreloadData::SiteReputation*
CrowdDenyPreloadData::GetReputationDataForSite(
const url::Origin& origin) const {
if (origin.scheme() != url::kHttpsScheme)
return nullptr;
const auto it_exact_match = domain_to_reputation_map_.find(origin.host());
if (it_exact_match != domain_to_reputation_map_.end())
return &it_exact_match->second;
const std::string registerable_domain =
net::registry_controlled_domains::GetDomainAndRegistry(
origin, net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES);
const auto it_domain_suffix_match =
domain_to_reputation_map_.find(registerable_domain);
if (it_domain_suffix_match != domain_to_reputation_map_.end() &&
it_domain_suffix_match->second.include_subdomains()) {
return &it_domain_suffix_match->second;
}
return nullptr;
}
void CrowdDenyPreloadData::SetSiteReputations(DomainToReputationMap map) {
domain_to_reputation_map_ = std::move(map);
is_ready_to_use_ = true;
CheckOriginsPendingVerification();
}
void CrowdDenyPreloadData::CheckOriginsPendingVerification() {
if (origins_pending_verification_.empty())
return;
GetReputationDataForSiteAsync(
origins_pending_verification_.front().origin,
std::move(origins_pending_verification_.front().callback));
origins_pending_verification_.pop();
// The |origins_pending_verification_| might not be empty, check the next
// item.
CheckOriginsPendingVerification();
}
CrowdDenyPreloadData::DomainToReputationMap
CrowdDenyPreloadData::TakeSiteReputations() {
return std::move(domain_to_reputation_map_);
}
// ScopedCrowdDenyPreloadDataOverride -----------------------------------
namespace testing {
ScopedCrowdDenyPreloadDataOverride::ScopedCrowdDenyPreloadDataOverride() {
old_map_ = CrowdDenyPreloadData::GetInstance()->TakeSiteReputations();
}
ScopedCrowdDenyPreloadDataOverride::~ScopedCrowdDenyPreloadDataOverride() {
CrowdDenyPreloadData::GetInstance()->SetSiteReputations(std::move(old_map_));
}
void ScopedCrowdDenyPreloadDataOverride::SetOriginReputation(
const url::Origin& origin,
SiteReputation site_reputation) {
auto* instance = CrowdDenyPreloadData::GetInstance();
DomainToReputationMap testing_map = instance->TakeSiteReputations();
testing_map[origin.host()] = std::move(site_reputation);
instance->SetSiteReputations(std::move(testing_map));
}
void ScopedCrowdDenyPreloadDataOverride::ClearAllReputations() {
CrowdDenyPreloadData::GetInstance()->TakeSiteReputations();
}
} // namespace testing
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