cld_component_installer.cc revision cedac228d2dd51db4b79ea1e72c7f249408ee061 
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 "base/platform_file.h"
17#include "chrome/browser/profiles/profile.h"
18#include "chrome/common/chrome_constants.h"
19#include "chrome/common/chrome_paths.h"
20#include "content/public/browser/browser_thread.h"
21#include "net/ssl/ssl_config_service.h"
22
23using component_updater::ComponentUpdateService;
24using content::BrowserThread;
25
26namespace {
27
28// Once we have acquired a valid file from the component installer, we need to
29// make the path available to other parts of the system such as the
30// translation libraries. We create a global to hold onto the path, and a
31// lock to guard it. See GetLatestCldDataFile(...) for more info.
32base::LazyInstance<base::Lock> cld_file_lock = LAZY_INSTANCE_INITIALIZER;
33base::LazyInstance<base::FilePath> cld_file = LAZY_INSTANCE_INITIALIZER;
34
35}
36
37namespace component_updater {
38
39// The SHA256 of the SubjectPublicKeyInfo used to sign the extension.
40// The extension id is: dpedmmgabcgnikllifiidmijgoiihfgf
41const uint8 kPublicKeySHA256[32] = {
42    0x3f, 0x43, 0xcc, 0x60, 0x12, 0x6d, 0x8a, 0xbb,
43    0x85, 0x88, 0x3c, 0x89, 0x6e, 0x88, 0x75, 0x65,
44    0xb9, 0x46, 0x09, 0xe8, 0xca, 0x92, 0xdd, 0x82,
45    0x4e, 0x6d, 0x0e, 0xe6, 0x79, 0x8a, 0x87, 0xf5
46};
47
48const char kCldManifestName[] = "CLD2 Data";
49
50CldComponentInstallerTraits::CldComponentInstallerTraits() {
51}
52
53bool CldComponentInstallerTraits::CanAutoUpdate() const {
54  return true;
55}
56
57bool CldComponentInstallerTraits::OnCustomInstall(
58    const base::DictionaryValue& manifest,
59    const base::FilePath& install_dir) {
60  return true;  // Nothing custom here.
61}
62
63base::FilePath CldComponentInstallerTraits::GetInstalledPath(
64    const base::FilePath& base) {
65  // Currently, all platforms have the file at the same location because there
66  // is no binary difference in the generated file on any supported platform.
67  // NB: This may change when 64-bit is officially supported.
68  return base.Append(FILE_PATH_LITERAL("_platform_specific"))
69      .Append(FILE_PATH_LITERAL("all"))
70      .Append(chrome::kCLDDataFilename);
71}
72
73void CldComponentInstallerTraits::ComponentReady(
74    const base::Version& version,
75    const base::FilePath& path,
76    scoped_ptr<base::DictionaryValue> manifest) {
77  VLOG(1) << "Component ready, version " << version.GetString() << " in "
78          << path.value();
79  SetLatestCldDataFile(GetInstalledPath(path));
80}
81
82bool CldComponentInstallerTraits::VerifyInstallation(
83    const base::FilePath& install_dir) const {
84  // We can't really do much to verify the CLD2 data file. In theory we could
85  // read the headers, but that won't do much other than tell us whether or
86  // not the headers are valid. So just check if the file exists.
87  const base::FilePath expected_file = GetInstalledPath(install_dir);
88  VLOG(1) << "Verifying install: " << expected_file.value();
89  const bool result = base::PathExists(expected_file);
90  VLOG(1) << "Verification result: " << (result ? "valid" : "invalid");
91  return result;
92}
93
94base::FilePath CldComponentInstallerTraits::GetBaseDirectory() const {
95  base::FilePath result;
96  PathService::Get(chrome::DIR_COMPONENT_CLD2, &result);
97  return result;
98}
99
100void CldComponentInstallerTraits::GetHash(std::vector<uint8>* hash) const {
101  hash->assign(kPublicKeySHA256,
102               kPublicKeySHA256 + arraysize(kPublicKeySHA256));
103}
104
105std::string CldComponentInstallerTraits::GetName() const {
106  return kCldManifestName;
107}
108
109void RegisterCldComponent(ComponentUpdateService* cus) {
110  scoped_ptr<ComponentInstallerTraits> traits(
111      new CldComponentInstallerTraits());
112  // |cus| will take ownership of |installer| during installer->Register(cus).
113  DefaultComponentInstaller* installer =
114      new DefaultComponentInstaller(traits.Pass());
115  installer->Register(cus);
116}
117
118void CldComponentInstallerTraits::SetLatestCldDataFile(
119    const base::FilePath& path) {
120  VLOG(1) << "Setting CLD data file location: " << path.value();
121  base::AutoLock lock(cld_file_lock.Get());
122  cld_file.Get() = path;
123}
124
125base::FilePath GetLatestCldDataFile() {
126  base::AutoLock lock(cld_file_lock.Get());
127  // cld_file is an empty path by default, meaning "file not available yet".
128  return cld_file.Get();
129}
130
131}  // namespace component_updater
132