src/chrome/browser/extensions/unpacked_installer.cc

   1 // Copyright (c) 2013 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/extensions/unpacked_installer.h"
   6
   7 #include "base/bind.h"
   8 #include "base/callback.h"
   9 #include "base/command_line.h"
  10 #include "base/file_util.h"
  11 #include "base/strings/string_util.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "base/threading/thread_restrictions.h"
  14 #include "chrome/browser/extensions/extension_error_reporter.h"
  15 #include "chrome/browser/extensions/extension_install_prompt.h"
  16 #include "chrome/browser/extensions/extension_install_ui.h"
  17 #include "chrome/browser/extensions/extension_service.h"
  18 #include "chrome/browser/extensions/permissions_updater.h"
  19 #include "chrome/browser/profiles/profile.h"
  20 #include "chrome/common/chrome_switches.h"
  21 #include "chrome/common/extensions/api/plugins/plugins_handler.h"
  22 #include "content/public/browser/browser_thread.h"
  23 #include "extensions/browser/extension_prefs.h"
  24 #include "extensions/browser/extension_registry.h"
  25 #include "extensions/common/extension.h"
  26 #include "extensions/common/extension_l10n_util.h"
  27 #include "extensions/common/file_util.h"
  28 #include "extensions/common/id_util.h"
  29 #include "extensions/common/manifest.h"
  30 #include "sync/api/string_ordinal.h"
  31
  32 using content::BrowserThread;
  33 using extensions::Extension;
  34
  35 namespace {
  36
  37 const char kUnpackedExtensionsBlacklistedError[] =
  38     "Loading of unpacked extensions is disabled by the administrator.";
  39
  40 // Manages an ExtensionInstallPrompt for a particular extension.
  41 class SimpleExtensionLoadPrompt : public ExtensionInstallPrompt::Delegate {
  42  public:
  43   SimpleExtensionLoadPrompt(const Extension* extension,
  44                             Profile* profile,
  45                             const base::Closure& callback);
  46   virtual ~SimpleExtensionLoadPrompt();
  47
  48   void ShowPrompt();
  49
  50   // ExtensionInstallUI::Delegate
  51   virtual void InstallUIProceed() OVERRIDE;
  52   virtual void InstallUIAbort(bool user_initiated) OVERRIDE;
  53
  54  private:
  55   scoped_ptr<ExtensionInstallPrompt> install_ui_;
  56   scoped_refptr<const Extension> extension_;
  57   base::Closure callback_;
  58 };
  59
  60 SimpleExtensionLoadPrompt::SimpleExtensionLoadPrompt(
  61     const Extension* extension,
  62     Profile* profile,
  63     const base::Closure& callback)
  64     : install_ui_(ExtensionInstallUI::CreateInstallPromptWithProfile(
  65           profile)),
  66       extension_(extension),
  67       callback_(callback) {
  68 }
  69
  70 SimpleExtensionLoadPrompt::~SimpleExtensionLoadPrompt() {
  71 }
  72
  73 void SimpleExtensionLoadPrompt::ShowPrompt() {
  74   std::string confirm = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
  75       switches::kAppsGalleryInstallAutoConfirmForTests);
  76   if (confirm == "accept") {
  77     InstallUIProceed();
  78     return;
  79   }
  80   if (confirm == "cancel") {
  81     InstallUIAbort(false);
  82     return;
  83   }
  84
  85   install_ui_->ConfirmInstall(
  86       this,
  87       extension_.get(),
  88       ExtensionInstallPrompt::GetDefaultShowDialogCallback());
  89 }
  90
  91 void SimpleExtensionLoadPrompt::InstallUIProceed() {
  92   callback_.Run();
  93   delete this;
  94 }
  95
  96 void SimpleExtensionLoadPrompt::InstallUIAbort(bool user_initiated) {
  97   delete this;
  98 }
  99
 100 }  // namespace
 101
 102 namespace extensions {
 103
 104 // static
 105 scoped_refptr<UnpackedInstaller> UnpackedInstaller::Create(
 106     ExtensionService* extension_service) {
 107   DCHECK(extension_service);
 108   return scoped_refptr<UnpackedInstaller>(
 109       new UnpackedInstaller(extension_service));
 110 }
 111
 112 UnpackedInstaller::UnpackedInstaller(ExtensionService* extension_service)
 113     : service_weak_(extension_service->AsWeakPtr()),
 114       prompt_for_plugins_(true),
 115       require_modern_manifest_version_(true),
 116       be_noisy_on_failure_(true),
 117       installer_(extension_service->profile()) {
 118   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 119 }
 120
 121 UnpackedInstaller::~UnpackedInstaller() {
 122   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) ||
 123         BrowserThread::CurrentlyOn(BrowserThread::FILE));
 124 }
 125
 126 void UnpackedInstaller::Load(const base::FilePath& path_in) {
 127   DCHECK(extension_path_.empty());
 128   extension_path_ = path_in;
 129   BrowserThread::PostTask(
 130       BrowserThread::FILE,
 131       FROM_HERE,
 132       base::Bind(&UnpackedInstaller::GetAbsolutePath, this));
 133 }
 134
 135 bool UnpackedInstaller::LoadFromCommandLine(const base::FilePath& path_in,
 136                                             std::string* extension_id) {
 137   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 138   DCHECK(extension_path_.empty());
 139
 140   if (!service_weak_.get())
 141     return false;
 142   // Load extensions from the command line synchronously to avoid a race
 143   // between extension loading and loading an URL from the command line.
 144   base::ThreadRestrictions::ScopedAllowIO allow_io;
 145
 146   extension_path_ = base::MakeAbsoluteFilePath(path_in);
 147
 148   if (!IsLoadingUnpackedAllowed()) {
 149     ReportExtensionLoadError(kUnpackedExtensionsBlacklistedError);
 150     return false;
 151   }
 152
 153   std::string error;
 154   installer_.set_extension(
 155       file_util::LoadExtension(
 156           extension_path_, Manifest::COMMAND_LINE, GetFlags(), &error).get());
 157
 158   if (!installer_.extension().get() ||
 159       !extension_l10n_util::ValidateExtensionLocales(
 160           extension_path_,
 161           installer_.extension()->manifest()->value(),
 162           &error)) {
 163     ReportExtensionLoadError(error);
 164     return false;
 165   }
 166
 167   ShowInstallPrompt();
 168
 169   *extension_id = installer_.extension()->id();
 170   return true;
 171 }
 172
 173 void UnpackedInstaller::ShowInstallPrompt() {
 174   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 175   if (!service_weak_.get())
 176     return;
 177
 178   const ExtensionSet& disabled_extensions =
 179       ExtensionRegistry::Get(service_weak_->profile())->disabled_extensions();
 180   if (service_weak_->show_extensions_prompts() && prompt_for_plugins_ &&
 181       PluginInfo::HasPlugins(installer_.extension().get()) &&
 182       !disabled_extensions.Contains(installer_.extension()->id())) {
 183     SimpleExtensionLoadPrompt* prompt = new SimpleExtensionLoadPrompt(
 184         installer_.extension().get(),
 185         installer_.profile(),
 186         base::Bind(&UnpackedInstaller::CallCheckRequirements, this));
 187     prompt->ShowPrompt();
 188     return;
 189   }
 190   CallCheckRequirements();
 191 }
 192
 193 void UnpackedInstaller::CallCheckRequirements() {
 194   installer_.CheckRequirements(
 195       base::Bind(&UnpackedInstaller::OnRequirementsChecked, this));
 196 }
 197
 198 void UnpackedInstaller::OnRequirementsChecked(
 199     std::vector<std::string> requirement_errors) {
 200   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 201
 202   if (!requirement_errors.empty()) {
 203     ReportExtensionLoadError(JoinString(requirement_errors, ' '));
 204     return;
 205   }
 206
 207   ConfirmInstall();
 208 }
 209
 210 int UnpackedInstaller::GetFlags() {
 211   std::string id = id_util::GenerateIdForPath(extension_path_);
 212   bool allow_file_access =
 213       Manifest::ShouldAlwaysAllowFileAccess(Manifest::UNPACKED);
 214   ExtensionPrefs* prefs = ExtensionPrefs::Get(service_weak_->profile());
 215   if (prefs->HasAllowFileAccessSetting(id))
 216     allow_file_access = prefs->AllowFileAccess(id);
 217
 218   int result = Extension::FOLLOW_SYMLINKS_ANYWHERE;
 219   if (allow_file_access)
 220     result |= Extension::ALLOW_FILE_ACCESS;
 221   if (require_modern_manifest_version_)
 222     result |= Extension::REQUIRE_MODERN_MANIFEST_VERSION;
 223
 224   return result;
 225 }
 226
 227 bool UnpackedInstaller::IsLoadingUnpackedAllowed() const {
 228   if (!service_weak_.get())
 229     return true;
 230   // If there is a "*" in the extension blacklist, then no extensions should be
 231   // allowed at all (except explicitly whitelisted extensions).
 232   ExtensionPrefs* prefs = ExtensionPrefs::Get(service_weak_->profile());
 233   return !prefs->ExtensionsBlacklistedByDefault();
 234 }
 235
 236 void UnpackedInstaller::GetAbsolutePath() {
 237   CHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
 238
 239   extension_path_ = base::MakeAbsoluteFilePath(extension_path_);
 240
 241   std::string error;
 242   if (!file_util::CheckForIllegalFilenames(extension_path_, &error)) {
 243     BrowserThread::PostTask(
 244         BrowserThread::UI,
 245         FROM_HERE,
 246         base::Bind(&UnpackedInstaller::ReportExtensionLoadError, this, error));
 247     return;
 248   }
 249   BrowserThread::PostTask(
 250       BrowserThread::UI, FROM_HERE,
 251       base::Bind(&UnpackedInstaller::CheckExtensionFileAccess, this));
 252 }
 253
 254 void UnpackedInstaller::CheckExtensionFileAccess() {
 255   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 256   if (!service_weak_.get())
 257     return;
 258
 259   if (!IsLoadingUnpackedAllowed()) {
 260     ReportExtensionLoadError(kUnpackedExtensionsBlacklistedError);
 261     return;
 262   }
 263
 264   BrowserThread::PostTask(
 265       BrowserThread::FILE,
 266       FROM_HERE,
 267       base::Bind(&UnpackedInstaller::LoadWithFileAccess, this, GetFlags()));
 268 }
 269
 270 void UnpackedInstaller::LoadWithFileAccess(int flags) {
 271   CHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
 272
 273   std::string error;
 274   installer_.set_extension(
 275       file_util::LoadExtension(
 276           extension_path_, Manifest::UNPACKED, flags, &error).get());
 277
 278   if (!installer_.extension().get() ||
 279       !extension_l10n_util::ValidateExtensionLocales(
 280           extension_path_,
 281           installer_.extension()->manifest()->value(),
 282           &error)) {
 283     BrowserThread::PostTask(
 284         BrowserThread::UI,
 285         FROM_HERE,
 286         base::Bind(&UnpackedInstaller::ReportExtensionLoadError, this, error));
 287     return;
 288   }
 289
 290   BrowserThread::PostTask(
 291       BrowserThread::UI,
 292       FROM_HERE,
 293       base::Bind(&UnpackedInstaller::ShowInstallPrompt, this));
 294 }
 295
 296 void UnpackedInstaller::ReportExtensionLoadError(const std::string &error) {
 297   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 298   if (!on_failure_callback_.is_null())
 299     on_failure_callback_.Run(extension_path_, error);
 300
 301   if (service_weak_.get()) {
 302     ExtensionErrorReporter::GetInstance()->ReportLoadError(
 303         extension_path_,
 304         error,
 305         service_weak_->profile(),
 306         be_noisy_on_failure_);
 307   }
 308 }
 309
 310 void UnpackedInstaller::ConfirmInstall() {
 311   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 312   base::string16 error = installer_.CheckManagementPolicy();
 313   if (!error.empty()) {
 314     ReportExtensionLoadError(base::UTF16ToUTF8(error));
 315     return;
 316   }
 317
 318   PermissionsUpdater perms_updater(service_weak_->profile());
 319   perms_updater.GrantActivePermissions(installer_.extension().get());
 320
 321   service_weak_->OnExtensionInstalled(
 322       installer_.extension().get(),
 323       syncer::StringOrdinal(),
 324       false /* no requirement errors */,
 325       NOT_BLACKLISTED,
 326       false /* don't wait for idle */);
 327 }
 328
 329 }  // namespace extensions