cld_component_installer.cc revision 5f1c94371a64b3196d4be9466099bb892df9b88e
1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/component_updater/cld_component_installer.h"
6
7#include <string>
8#include <vector>
9
10#include "base/bind.h"
11#include "base/file_util.h"
12#include "base/files/file_path.h"
13#include "base/lazy_instance.h"
14#include "base/logging.h"
15#include "base/path_service.h"
16#include "components/component_updater/component_updater_paths.h"
17#include "components/translate/content/browser/browser_cld_data_provider.h"
18#include "components/translate/content/common/cld_data_source.h"
19#include "content/public/browser/browser_thread.h"
20#include "net/ssl/ssl_config_service.h"
21
22using component_updater::ComponentUpdateService;
23
24namespace {
25// TODO(andrewhayden): Make the data file path into a gyp/gn define
26// If you change this, also update component_cld_data_harness.cc
27// and cld_component_installer_unittest.cc accordingly!
28const base::FilePath::CharType kCldDataFileName[] =
29  FILE_PATH_LITERAL("cld2_data.bin");
30
31// Tracks the last value seen in SetLatestCldDataFile.
32base::LazyInstance<base::FilePath>::Leaky g_latest_cld_data_file =
33  LAZY_INSTANCE_INITIALIZER;
34}  // namespace
35
36namespace component_updater {
37
38// The SHA256 of the SubjectPublicKeyInfo used to sign the extension.
39// The extension id is: dpedmmgabcgnikllifiidmijgoiihfgf
40const uint8 kPublicKeySHA256[32] = {
41    0x3f, 0x43, 0xcc, 0x60, 0x12, 0x6d, 0x8a, 0xbb,
42    0x85, 0x88, 0x3c, 0x89, 0x6e, 0x88, 0x75, 0x65,
43    0xb9, 0x46, 0x09, 0xe8, 0xca, 0x92, 0xdd, 0x82,
44    0x4e, 0x6d, 0x0e, 0xe6, 0x79, 0x8a, 0x87, 0xf5
45};
46
47const char kCldManifestName[] = "CLD2 Data";
48
49CldComponentInstallerTraits::CldComponentInstallerTraits() {
50}
51
52bool CldComponentInstallerTraits::CanAutoUpdate() const {
53  return true;
54}
55
56bool CldComponentInstallerTraits::OnCustomInstall(
57    const base::DictionaryValue& manifest,
58    const base::FilePath& install_dir) {
59  return true;  // Nothing custom here.
60}
61
62base::FilePath CldComponentInstallerTraits::GetInstalledPath(
63    const base::FilePath& base) {
64  // Currently, all platforms have the file at the same location because there
65  // is no binary difference in the generated file on any supported platform.
66  // NB: This may change when 64-bit is officially supported.
67  return base.Append(FILE_PATH_LITERAL("_platform_specific"))
68      .Append(FILE_PATH_LITERAL("all"))
69      .Append(kCldDataFileName);
70}
71
72void CldComponentInstallerTraits::ComponentReady(
73    const base::Version& version,
74    const base::FilePath& path,
75    scoped_ptr<base::DictionaryValue> manifest) {
76  VLOG(1) << "Component ready, version " << version.GetString() << " in "
77          << path.value();
78  SetLatestCldDataFile(GetInstalledPath(path));
79}
80
81bool CldComponentInstallerTraits::VerifyInstallation(
82    const base::FilePath& install_dir) const {
83  // We can't really do much to verify the CLD2 data file. In theory we could
84  // read the headers, but that won't do much other than tell us whether or
85  // not the headers are valid. So just check if the file exists.
86  const base::FilePath expected_file = GetInstalledPath(install_dir);
87  VLOG(1) << "Verifying install: " << expected_file.value();
88  const bool result = base::PathExists(expected_file);
89  VLOG(1) << "Verification result: " << (result ? "valid" : "invalid");
90  return result;
91}
92
93base::FilePath CldComponentInstallerTraits::GetBaseDirectory() const {
94  base::FilePath result;
95  PathService::Get(DIR_COMPONENT_CLD2, &result);
96  return result;
97}
98
99void CldComponentInstallerTraits::GetHash(std::vector<uint8>* hash) const {
100  hash->assign(kPublicKeySHA256,
101               kPublicKeySHA256 + arraysize(kPublicKeySHA256));
102}
103
104std::string CldComponentInstallerTraits::GetName() const {
105  return kCldManifestName;
106}
107
108void RegisterCldComponent(ComponentUpdateService* cus) {
109  // Make sure we don't start up if the CLD data source isn't compatible.
110  if (!translate::CldDataSource::ShouldRegisterForComponentUpdates()) {
111    // This is a serious build-time configuration error.
112    LOG(ERROR) << "Wrong CLD data source: " <<
113        translate::CldDataSource::GetName();
114    NOTREACHED();
115    return;
116  }
117
118  // This log line is to help with determining which kind of provider has been
119  // configured. See also: chrome://translate-internals
120  VLOG(1) << "Registering CLD component with the component update service";
121
122  scoped_ptr<ComponentInstallerTraits> traits(
123      new CldComponentInstallerTraits());
124  // |cus| will take ownership of |installer| during installer->Register(cus).
125  DefaultComponentInstaller* installer =
126      new DefaultComponentInstaller(traits.Pass());
127  installer->Register(cus);
128}
129
130void CldComponentInstallerTraits::SetLatestCldDataFile(
131    const base::FilePath& path) {
132  VLOG(1) << "Setting CLD data file location: " << path.value();
133  g_latest_cld_data_file.Get() = path;
134  translate::SetCldDataFilePath(path);
135}
136
137base::FilePath CldComponentInstallerTraits::GetLatestCldDataFile() {
138  return g_latest_cld_data_file.Get();
139}
140
141}  // namespace component_updater
142