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