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// Copyright 2024 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/translate_kit_component_installer.h"
#include <algorithm>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/values.h"
#include "build/build_config.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/on_device_translation/constants.h"
#include "chrome/browser/on_device_translation/pref_names.h"
#include "components/component_updater/component_updater_service.h"
#include "components/crx_file/id_util.h"
#include "components/services/on_device_translation/public/cpp/features.h"
#include "components/update_client/update_client_errors.h"
#include "content/public/browser/browser_thread.h"
#include "crypto/sha2.h"
namespace component_updater {
namespace {
// The SHA256 of the SubjectPublicKeyInfo used to sign the component.
// The component id is: lbimbicckdokpoicboneldipejkhjgdg
constexpr uint8_t kTranslateKitPublicKeySHA256[32] = {
0xb1, 0x8c, 0x18, 0x22, 0xa3, 0xea, 0xfe, 0x82, 0x1e, 0xd4, 0xb3,
0x8f, 0x49, 0xa7, 0x96, 0x36, 0x55, 0xf3, 0xbc, 0x0d, 0xa5, 0x67,
0x48, 0x09, 0xcd, 0x7b, 0xa9, 0x5f, 0xd8, 0x7f, 0x53, 0xb4};
static_assert(std::size(kTranslateKitPublicKeySHA256) == crypto::kSHA256Length,
"Wrong hash length");
// The location of the libtranslatekit binary within the installation directory.
#if BUILDFLAG(IS_WIN)
constexpr base::FilePath::CharType kTranslateKitBinaryRelativePath[] =
FILE_PATH_LITERAL("TranslateKitFiles/libtranslatekit.dll");
#else
constexpr base::FilePath::CharType kTranslateKitBinaryRelativePath[] =
FILE_PATH_LITERAL("TranslateKitFiles/libtranslatekit.so");
#endif
// The manifest name of the TranslateKit component.
// This matches:
// - the manifest name in Automation.java from
// go/newchromecomponent#server-side-setup.
// - the display name at http://omaharelease/2134318/settings.
constexpr char kTranslateKitManifestName[] = "Chrome TranslateKit";
// Returns the full path where the libtranslatekit binary will be installed.
//
// The installation path is under
// <UserDataDir>/TranslateKit/lib/<version>/TranslateKitFiles/libtranslatekit.xx
// where <User Data Dir> can be determined by following the guide:
// https://chromium.googlesource.com/chromium/src.git/+/HEAD/docs/user_data_dir.md#current-location
base::FilePath GetInstalledPath(const base::FilePath& base) {
return base.Append(kTranslateKitBinaryRelativePath);
}
} // namespace
TranslateKitComponentInstallerPolicy::TranslateKitComponentInstallerPolicy(
PrefService* pref_service)
: pref_service_(pref_service) {}
TranslateKitComponentInstallerPolicy::~TranslateKitComponentInstallerPolicy() =
default;
bool TranslateKitComponentInstallerPolicy::VerifyInstallation(
const base::Value::Dict& manifest,
const base::FilePath& install_dir) const {
return base::PathExists(GetInstalledPath(install_dir));
}
bool TranslateKitComponentInstallerPolicy::
SupportsGroupPolicyEnabledComponentUpdates() const {
return true;
}
bool TranslateKitComponentInstallerPolicy::RequiresNetworkEncryption() const {
return false;
}
update_client::CrxInstaller::Result
TranslateKitComponentInstallerPolicy::OnCustomInstall(
const base::Value::Dict& manifest,
const base::FilePath& install_dir) {
// Nothing custom here.
return update_client::CrxInstaller::Result(0);
}
void TranslateKitComponentInstallerPolicy::OnCustomUninstall() {}
void TranslateKitComponentInstallerPolicy::ComponentReady(
const base::Version& version,
const base::FilePath& install_dir,
base::Value::Dict manifest) {
VLOG(1) << "Component ready, version " << version.GetString() << " in "
<< install_dir.value();
CHECK(pref_service_);
pref_service_->SetFilePath(prefs::kTranslateKitBinaryPath,
GetInstalledPath(install_dir));
}
base::FilePath TranslateKitComponentInstallerPolicy::GetRelativeInstallDir()
const {
return base::FilePath(
on_device_translation::kTranslateKitBinaryInstallationRelativeDir);
}
void TranslateKitComponentInstallerPolicy::GetHash(
std::vector<uint8_t>* hash) const {
hash->assign(std::begin(kTranslateKitPublicKeySHA256),
std::end(kTranslateKitPublicKeySHA256));
}
std::string TranslateKitComponentInstallerPolicy::GetName() const {
return kTranslateKitManifestName;
}
update_client::InstallerAttributes
TranslateKitComponentInstallerPolicy::GetInstallerAttributes() const {
update_client::InstallerAttributes installer_attributes;
#if defined(MEMORY_SANITIZER)
installer_attributes["is_msan"] = "true";
#endif // defined(MEMORY_SANITIZER)
return installer_attributes;
}
// static
void TranslateKitComponentInstallerPolicy::UpdateComponentOnDemand() {
auto crx_id = GetExtensionId();
g_browser_process->component_updater()->GetOnDemandUpdater().OnDemandUpdate(
crx_id, component_updater::OnDemandUpdater::Priority::FOREGROUND,
base::BindOnce([](update_client::Error error) {
if (error != update_client::Error::NONE &&
error != update_client::Error::UPDATE_IN_PROGRESS) {
LOG(ERROR) << "Failed to uppdate TranslateKit:"
<< static_cast<int>(error);
}
}));
}
// static
const std::string TranslateKitComponentInstallerPolicy::GetExtensionId() {
return crx_file::id_util::GenerateIdFromHash(kTranslateKitPublicKeySHA256);
}
void RegisterTranslateKitComponent(ComponentUpdateService* cus,
PrefService* pref_service,
bool force_install,
base::OnceClosure registered_callback) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
VLOG(1) << "Registering TranslateKit component.";
if (!force_install &&
!pref_service->GetBoolean(prefs::kTranslateKitPreviouslyRegistered)) {
return;
}
// If the component is already installed, do nothing.
const std::vector<std::string> component_ids = cus->GetComponentIDs();
if (std::find(component_ids.begin(), component_ids.end(),
TranslateKitComponentInstallerPolicy::GetExtensionId()) !=
component_ids.end()) {
return;
}
pref_service->SetBoolean(prefs::kTranslateKitPreviouslyRegistered, true);
auto installer = base::MakeRefCounted<ComponentInstaller>(
std::make_unique<TranslateKitComponentInstallerPolicy>(pref_service));
installer->Register(cus, std::move(registered_callback));
}
} // namespace component_updater
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