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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/component_updater/zxcvbn_data_component_installer.h"
#include <algorithm>
#include <array>
#include <bit>
#include <cstdint>
#include <memory>
#include <string>
#include <string_view>
#include <vector>
#include "base/containers/flat_map.h"
#include "base/feature_list.h"
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/files/memory_mapped_file.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/memory/scoped_refptr.h"
#include "base/strings/string_split.h"
#include "base/task/thread_pool.h"
#include "base/values.h"
#include "base/version.h"
#include "components/component_updater/component_installer.h"
#include "components/component_updater/component_updater_service.h"
#include "components/password_manager/core/common/password_manager_features.h"
#include "components/update_client/update_client.h"
#include "components/update_client/update_client_errors.h"
#include "components/update_client/utils.h"
#include "third_party/zxcvbn-cpp/native-src/zxcvbn/frequency_lists.hpp"
namespace component_updater {
constexpr base::FilePath::StringViewType
ZxcvbnDataComponentInstallerPolicy::kEnglishWikipediaTxtFileName;
constexpr base::FilePath::StringViewType
ZxcvbnDataComponentInstallerPolicy::kFemaleNamesTxtFileName;
constexpr base::FilePath::StringViewType
ZxcvbnDataComponentInstallerPolicy::kMaleNamesTxtFileName;
constexpr base::FilePath::StringViewType
ZxcvbnDataComponentInstallerPolicy::kPasswordsTxtFileName;
constexpr base::FilePath::StringViewType
ZxcvbnDataComponentInstallerPolicy::kSurnamesTxtFileName;
constexpr base::FilePath::StringViewType
ZxcvbnDataComponentInstallerPolicy::kUsTvAndFilmTxtFileName;
constexpr base::FilePath::StringViewType
ZxcvbnDataComponentInstallerPolicy::kCombinedRankedDictsFileName;
namespace {
constexpr char kFirstMemoryMappedVersion[] = "2";
// The size (in bytes) of the marker at the beginning of the (memory mapped)
// combined ranked dictionaries file.
constexpr int kNumMarkerBytes = 1;
// The marker bit - see also `zxcvbn::MarkedBigEndianU15::MARKER_BIT`.
constexpr uint8_t kMarkerBit = 0x80;
zxcvbn::RankedDicts MemoryMapRankedDictionaries(
const base::FilePath& install_dir) {
base::FilePath dictionary_path = install_dir.Append(
ZxcvbnDataComponentInstallerPolicy::kCombinedRankedDictsFileName);
DVLOG(1) << "Memory mapping dictionary from file: " << dictionary_path;
auto map = std::make_unique<base::MemoryMappedFile>();
if (!map->Initialize(dictionary_path)) {
VLOG(1) << "Failed to memory map file from " << dictionary_path;
return zxcvbn::RankedDicts(nullptr);
}
return zxcvbn::RankedDicts(std::move(map));
}
// The SHA256 of the SubjectPublicKeyInfo used to sign the extension.
// The extension id is: ojhpjlocmbogdgmfpkhlaaeamibhnphh
constexpr std::array<uint8_t, 32> kZxcvbnDataPublicKeySha256 = {
0xe9, 0x7f, 0x9b, 0xe2, 0xc1, 0xe6, 0x36, 0xc5, 0xfa, 0x7b, 0x00,
0x40, 0xc8, 0x17, 0xdf, 0x77, 0x34, 0x64, 0x84, 0x70, 0x3d, 0xa2,
0x14, 0x9a, 0x79, 0x99, 0x57, 0xa7, 0x1e, 0x66, 0xf5, 0xb3,
};
} // namespace
bool ZxcvbnDataComponentInstallerPolicy::VerifyInstallation(
const base::Value::Dict& manifest,
const base::FilePath& install_dir) const {
const std::string* version_string = manifest.FindString("version");
if (!version_string) {
return false;
}
base::Version version(*version_string);
if (!version.IsValid()) {
return false;
}
if (std::ranges::any_of(kFileNames, [&install_dir](const auto& file_name) {
return !base::PathExists(install_dir.Append(file_name));
})) {
return false;
}
if (version < base::Version(kFirstMemoryMappedVersion)) {
return false;
}
// If the version supports memory mapping, then the binary file that contains
// the combined ranked dictionaries must exist, too.
const base::FilePath combined_ranked_dicts_path = install_dir.Append(
ZxcvbnDataComponentInstallerPolicy::kCombinedRankedDictsFileName);
if (!base::PathExists(combined_ranked_dicts_path)) {
return false;
}
// Perform a minimal check that the file has not been corrupted - otherwise
// the client will run into a failing CHECK when using the library.
// See (crbug.com/1505352) for instances where this occurred.
char local_buffer[kNumMarkerBytes] = {};
if (base::ReadFile(combined_ranked_dicts_path, local_buffer,
/*max_size=*/kNumMarkerBytes) != kNumMarkerBytes) {
return false;
}
return std::bit_cast<uint8_t>(local_buffer[0]) & kMarkerBit;
}
bool ZxcvbnDataComponentInstallerPolicy::
SupportsGroupPolicyEnabledComponentUpdates() const {
return true;
}
bool ZxcvbnDataComponentInstallerPolicy::RequiresNetworkEncryption() const {
return false;
}
update_client::CrxInstaller::Result
ZxcvbnDataComponentInstallerPolicy::OnCustomInstall(
const base::Value::Dict& manifest,
const base::FilePath& install_dir) {
return update_client::CrxInstaller::Result(update_client::InstallError::NONE);
}
void ZxcvbnDataComponentInstallerPolicy::OnCustomUninstall() {}
void ZxcvbnDataComponentInstallerPolicy::ComponentReady(
const base::Version& version,
const base::FilePath& install_dir,
base::Value::Dict manifest) {
DVLOG(1) << "Zxcvbn Data Component ready, version " << version.GetString()
<< " in " << install_dir;
if (version >= base::Version(kFirstMemoryMappedVersion)) {
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE, {base::MayBlock(), base::TaskPriority::BEST_EFFORT},
base::BindOnce(&MemoryMapRankedDictionaries, install_dir),
base::BindOnce(&zxcvbn::SetRankedDicts));
} else {
DVLOG(1) << "Zxcvbn Data Component failed, old version";
}
}
base::FilePath ZxcvbnDataComponentInstallerPolicy::GetRelativeInstallDir()
const {
return base::FilePath(FILE_PATH_LITERAL("ZxcvbnData"));
}
void ZxcvbnDataComponentInstallerPolicy::GetHash(
std::vector<uint8_t>* hash) const {
hash->assign(kZxcvbnDataPublicKeySha256.begin(),
kZxcvbnDataPublicKeySha256.end());
}
std::string ZxcvbnDataComponentInstallerPolicy::GetName() const {
return "Zxcvbn Data Dictionaries";
}
update_client::InstallerAttributes
ZxcvbnDataComponentInstallerPolicy::GetInstallerAttributes() const {
return update_client::InstallerAttributes();
}
void RegisterZxcvbnDataComponent(ComponentUpdateService* cus) {
base::MakeRefCounted<ComponentInstaller>(
std::make_unique<ZxcvbnDataComponentInstallerPolicy>())
->Register(cus, base::NullCallback());
}
} // namespace component_updater
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