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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// 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/recovery_component_installer.h"
#include <stdint.h>
#include <string>
#include "base/base_paths.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/compiler_specific.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/path_service.h"
#include "base/prefs/pref_registry_simple.h"
#include "base/prefs/pref_service.h"
#include "base/process/launch.h"
#include "base/strings/string_util.h"
#include "base/values.h"
#include "components/component_updater/component_updater_paths.h"
#include "components/component_updater/component_updater_service.h"
#include "components/component_updater/pref_names.h"
#include "content/public/browser/browser_thread.h"
using content::BrowserThread;
namespace component_updater {
namespace {
// CRX hash. The extension id is: npdjjkjlcidkjlamlmmdelcjbcpdjocm.
const uint8_t kSha2Hash[] = {0xdf, 0x39, 0x9a, 0x9b, 0x28, 0x3a, 0x9b, 0x0c,
0xbc, 0xc3, 0x4b, 0x29, 0x12, 0xf3, 0x9e, 0x2c,
0x19, 0x7a, 0x71, 0x4b, 0x0a, 0x7c, 0x80, 0x1c,
0xf6, 0x29, 0x7c, 0x0a, 0x5f, 0xea, 0x67, 0xb7};
// File name of the recovery binary on different platforms.
const base::FilePath::CharType kRecoveryFileName[] =
#if defined(OS_WIN)
FILE_PATH_LITERAL("ChromeRecovery.exe");
#else // OS_LINUX, OS_MACOSX, etc.
FILE_PATH_LITERAL("ChromeRecovery");
#endif
const char kRecoveryManifestName[] = "ChromeRecovery";
} // namespace
class RecoveryComponentInstaller : public ComponentInstaller {
public:
explicit RecoveryComponentInstaller(const Version& version,
PrefService* prefs);
virtual ~RecoveryComponentInstaller() {}
virtual void OnUpdateError(int error) OVERRIDE;
virtual bool Install(const base::DictionaryValue& manifest,
const base::FilePath& unpack_path) OVERRIDE;
virtual bool GetInstalledFile(const std::string& file,
base::FilePath* installed_file) OVERRIDE;
private:
Version current_version_;
PrefService* prefs_;
};
void RecoveryRegisterHelper(ComponentUpdateService* cus, PrefService* prefs) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
Version version(prefs->GetString(prefs::kRecoveryComponentVersion));
if (!version.IsValid()) {
NOTREACHED();
return;
}
CrxComponent recovery;
recovery.name = "recovery";
recovery.installer = new RecoveryComponentInstaller(version, prefs);
recovery.version = version;
recovery.pk_hash.assign(kSha2Hash, &kSha2Hash[sizeof(kSha2Hash)]);
if (cus->RegisterComponent(recovery) != ComponentUpdateService::kOk) {
NOTREACHED() << "Recovery component registration failed.";
}
}
void RecoveryUpdateVersionHelper(const Version& version, PrefService* prefs) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
prefs->SetString(prefs::kRecoveryComponentVersion, version.GetString());
}
RecoveryComponentInstaller::RecoveryComponentInstaller(const Version& version,
PrefService* prefs)
: current_version_(version), prefs_(prefs) {
DCHECK(version.IsValid());
}
void RecoveryComponentInstaller::OnUpdateError(int error) {
NOTREACHED() << "Recovery component update error: " << error;
}
bool RecoveryComponentInstaller::Install(const base::DictionaryValue& manifest,
const base::FilePath& unpack_path) {
std::string name;
manifest.GetStringASCII("name", &name);
if (name != kRecoveryManifestName)
return false;
std::string proposed_version;
manifest.GetStringASCII("version", &proposed_version);
Version version(proposed_version.c_str());
if (!version.IsValid())
return false;
if (current_version_.CompareTo(version) >= 0)
return false;
// Passed the basic tests. Copy the installation to a permanent directory.
base::FilePath path;
if (!PathService::Get(DIR_RECOVERY_BASE, &path))
return false;
if (!base::PathExists(path)) {
if (!base::CreateDirectory(path)) {
return false;
}
}
path = path.AppendASCII(version.GetString());
if (base::PathExists(path) && !base::DeleteFile(path, true))
return false;
if (!base::Move(unpack_path, path)) {
DVLOG(1) << "Recovery component move failed.";
return false;
}
base::FilePath main_file = path.Append(kRecoveryFileName);
if (!base::PathExists(main_file))
return false;
// Run the recovery component.
CommandLine cmdline(main_file);
std::string arguments;
if (manifest.GetStringASCII("x-recovery-args", &arguments))
cmdline.AppendArg(arguments);
std::string add_version;
if (manifest.GetStringASCII("x-recovery-add-version", &add_version)) {
if (add_version == "yes")
cmdline.AppendSwitchASCII("version", current_version_.GetString());
}
current_version_ = version;
if (prefs_) {
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&RecoveryUpdateVersionHelper, version, prefs_));
}
return base::LaunchProcess(cmdline, base::LaunchOptions(), NULL);
}
bool RecoveryComponentInstaller::GetInstalledFile(
const std::string& file,
base::FilePath* installed_file) {
return false;
}
void RegisterRecoveryComponent(ComponentUpdateService* cus,
PrefService* prefs) {
#if !defined(OS_CHROMEOS)
// We delay execute the registration because we are not required in
// the critical path during browser startup.
BrowserThread::PostDelayedTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&RecoveryRegisterHelper, cus, prefs),
base::TimeDelta::FromSeconds(6));
#endif
}
void RegisterPrefsForRecoveryComponent(PrefRegistrySimple* registry) {
registry->RegisterStringPref(prefs::kRecoveryComponentVersion, "0.0.0.0");
}
} // namespace component_updater
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