blob: 4153a22dcfc39ee4ea87fff4e9f43496785e925b [file] [log] [blame]
// 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 <map>
#include <memory>
#include <set>
#include <string>
#include <vector>
#include "base/compiler_specific.h"
#include "base/files/file_path.h"
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/optional.h"
#include "base/scoped_observer.h"
#include "base/strings/string16.h"
#include "chrome/browser/extensions/blacklist.h"
#include "chrome/browser/extensions/extension_management.h"
#include "chrome/browser/extensions/forced_extensions/installation_tracker.h"
#include "chrome/browser/extensions/install_gate.h"
#include "chrome/browser/extensions/pending_extension_manager.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "chrome/browser/profiles/profile_manager_observer.h"
#include "chrome/browser/upgrade_detector/upgrade_observer.h"
#include "components/sync/model/string_ordinal.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "extensions/browser/crx_file_info.h"
#include "extensions/browser/disable_reason.h"
#include "extensions/browser/extension_prefs.h"
#include "extensions/browser/extension_registrar.h"
#include "extensions/browser/external_provider_interface.h"
#include "extensions/browser/install_flag.h"
#include "extensions/browser/process_manager.h"
#include "extensions/browser/uninstall_reason.h"
#include "extensions/buildflags/buildflags.h"
#include "extensions/common/extension.h"
#include "extensions/common/extension_set.h"
#include "extensions/common/manifest.h"
#error "Extensions must be enabled"
class BlacklistedExtensionSyncServiceTest;
class HostContentSettingsMap;
class Profile;
namespace base {
class CommandLine;
class OneShotEvent;
namespace extensions {
class AppDataMigrator;
class ComponentLoader;
class CrxInstaller;
class ExtensionActionStorageManager;
class ExtensionErrorController;
class ExtensionRegistry;
class ExtensionSystem;
class ExtensionUpdater;
class ExternalInstallManager;
class SharedModuleService;
class UpdateObserver;
// This is an interface class to encapsulate the dependencies that
// various classes have on ExtensionService. This allows easy mocking.
class ExtensionServiceInterface
: public base::SupportsWeakPtr<ExtensionServiceInterface> {
virtual ~ExtensionServiceInterface() {}
// Gets the object managing the set of pending extensions.
virtual PendingExtensionManager* pending_extension_manager() = 0;
// Installs an update with the contents from |extension_path|. Returns true if
// the install can be started. Sets |out_crx_installer| to the installer if
// one was started.
// TODO(aa): This method can be removed. ExtensionUpdater could use
// CrxInstaller directly instead.
virtual bool UpdateExtension(const CRXFileInfo& file,
bool file_ownership_passed,
CrxInstaller** out_crx_installer) = 0;
// DEPRECATED: Use ExtensionRegistry instead.
// Looks up an extension by ID, regardless of whether it's enabled,
// disabled, blacklisted, or terminated. Use instead:
// ExtensionRegistry::GetInstalledExtension(id).
virtual const Extension* GetInstalledExtension(
const std::string& id) const = 0;
// Returns an update for an extension with the specified id, if installation
// of that update was previously delayed because the extension was in use. If
// no updates are pending for the extension returns NULL.
virtual const Extension* GetPendingExtensionUpdate(
const std::string& extension_id) const = 0;
// Attempts finishing installation of an update for an extension with the
// specified id, when installation of that extension was previously delayed.
// |install_immediately| - Whether the extension should be installed if it's
// currently in use.
// Returns whether the extension installation was finished.
virtual bool FinishDelayedInstallationIfReady(const std::string& extension_id,
bool install_immediately) = 0;
// Returns true if the extension with the given |extension_id| is enabled.
// This will only return a valid answer for installed extensions (regardless
// of whether it is currently loaded or not). Loaded extensions return true
// if they are currently loaded or terminated. Unloaded extensions will
// return true if they are not blocked, disabled, blacklisted or uninstalled
// (for external extensions).
virtual bool IsExtensionEnabled(const std::string& extension_id) const = 0;
// Go through each extension and unload those that are not allowed to run by
// management policy providers (ie. network admin and Google-managed
// blacklist).
virtual void CheckManagementPolicy() = 0;
// Safe to call multiple times in a row.
// TODO(akalin): Remove this method (and others) once we refactor
// themes sync to not use it directly.
virtual void CheckForUpdatesSoon() = 0;
// Adds |extension| to this ExtensionService and notifies observers that the
// extension has been loaded.
virtual void AddExtension(const Extension* extension) = 0;
// Check if we have preferences for the component extension and, if not or if
// the stored version differs, install the extension (without requirements
// checking) before calling AddExtension.
virtual void AddComponentExtension(const Extension* extension) = 0;
// Unload the specified extension.
virtual void UnloadExtension(const std::string& extension_id,
UnloadedExtensionReason reason) = 0;
// Remove the specified component extension.
virtual void RemoveComponentExtension(const std::string& extension_id) = 0;
// Whether the extension service is ready.
virtual bool is_ready() = 0;
// Manages installed and running Chromium extensions. An instance is shared
// between normal and incognito profiles.
class ExtensionService : public ExtensionServiceInterface,
public ExternalProviderInterface::VisitorInterface,
public content::NotificationObserver,
public Blacklist::Observer,
public ExtensionManagement::Observer,
public UpgradeObserver,
public ExtensionRegistrar::Delegate,
public ProfileManagerObserver {
// Constructor stores pointers to |profile| and |extension_prefs| but
// ownership remains at caller.
ExtensionService(Profile* profile,
const base::CommandLine* command_line,
const base::FilePath& install_directory,
ExtensionPrefs* extension_prefs,
Blacklist* blacklist,
bool autoupdate_enabled,
bool extensions_enabled,
base::OneShotEvent* ready);
~ExtensionService() override;
// ExtensionServiceInterface implementation.
// NOTE: Many of these methods are DEPRECATED. See the interface for details.
PendingExtensionManager* pending_extension_manager() override;
const Extension* GetInstalledExtension(const std::string& id) const override;
bool UpdateExtension(const CRXFileInfo& file,
bool file_ownership_passed,
CrxInstaller** out_crx_installer) override;
bool IsExtensionEnabled(const std::string& extension_id) const override;
void UnloadExtension(const std::string& extension_id,
UnloadedExtensionReason reason) override;
void RemoveComponentExtension(const std::string& extension_id) override;
void AddExtension(const Extension* extension) override;
void AddComponentExtension(const Extension* extension) override;
const Extension* GetPendingExtensionUpdate(
const std::string& extension_id) const override;
bool FinishDelayedInstallationIfReady(const std::string& extension_id,
bool install_immediately) override;
void CheckManagementPolicy() override;
void CheckForUpdatesSoon() override;
bool is_ready() override;
// ExternalProvider::VisitorInterface implementation.
// Exposed for testing.
bool OnExternalExtensionFileFound(
const ExternalInstallInfoFile& info) override;
bool OnExternalExtensionUpdateUrlFound(
const ExternalInstallInfoUpdateUrl& info,
bool is_initial_load) override;
void OnExternalProviderReady(
const ExternalProviderInterface* provider) override;
void OnExternalProviderUpdateComplete(
const ExternalProviderInterface* provider,
const std::vector<ExternalInstallInfoUpdateUrl>&
const std::vector<ExternalInstallInfoFile>& external_file_extensions,
const std::set<std::string>& removed_extensions) override;
// ExtensionManagement::Observer implementation:
void OnExtensionManagementSettingsChanged() override;
// Initialize and start all installed extensions.
void Init();
// Called when the associated Profile is going to be destroyed.
void Shutdown();
// Reloads the specified extension, sending the onLaunched() event to it if it
// currently has any window showing.
// Allows noisy failures.
// NOTE: Reloading an extension can invalidate |extension_id| and Extension
// pointers for the given extension. Consider making a copy of |extension_id|
// first and retrieving a new Extension pointer afterwards.
void ReloadExtension(const std::string& extension_id);
// Suppresses noisy failures.
void ReloadExtensionWithQuietFailure(const std::string& extension_id);
// Uninstalls the specified extension. Callers should only call this method
// with extensions that exist. |reason| lets the caller specify why the
// extension is uninstalled.
// Note: this method synchronously removes the extension from the
// set of installed extensions stored in the ExtensionRegistry, but will
// asynchronously remove site-related data and the files stored on disk.
// Returns true if an uninstall was successfully triggered; this can fail if
// the extension cannot be uninstalled (such as a policy force-installed
// extension).
bool UninstallExtension(const std::string& extension_id,
UninstallReason reason,
base::string16* error);
// Enables the extension. If the extension is already enabled, does
// nothing.
void EnableExtension(const std::string& extension_id);
// Disables the extension. If the extension is already disabled, just adds
// the |disable_reasons| (a bitmask of disable_reason::DisableReason - there
// can be multiple DisableReasons e.g. when an extension comes in disabled
// from Sync). If the extension cannot be disabled (due to policy), does
// nothing.
void DisableExtension(const std::string& extension_id, int disable_reasons);
// Same as |DisableExtension|, but assumes that the request to disable
// |extension_id| originates from |source_extension| when evaluating whether
// the extension can be disabled. Please see |ExtensionMayModifySettings|
// for details.
void DisableExtensionWithSource(
const Extension* source_extension,
const std::string& extension_id,
disable_reason::DisableReason disable_reasons);
// Disable non-default and non-managed extensions with ids not in
// |except_ids|. Default extensions are those from the Web Store with
// |was_installed_by_default| flag.
void DisableUserExtensionsExcept(const std::vector<std::string>& except_ids);
// Puts all extensions in a blocked state: Unloading every extension, and
// preventing them from ever loading until UnblockAllExtensions is called.
// This state is stored in preferences, so persists until Chrome restarts.
// Component, external component and whitelisted policy installed extensions
// are exempt from being Blocked (see CanBlockExtension in .cc file).
void BlockAllExtensions();
// All blocked extensions are reverted to their previous state, and are
// reloaded. Newly added extensions are no longer automatically blocked.
void UnblockAllExtensions();
// Updates the |extension|'s granted permissions lists to include all
// permissions in the |extension|'s manifest and re-enables the
// extension.
void GrantPermissionsAndEnableExtension(const Extension* extension);
// Updates the |extension|'s granted permissions lists to include all
// permissions in the |extensions|'s manifest.
void GrantPermissions(const Extension* extension);
// Check for updates (or potentially new extensions from external providers)
void CheckForExternalUpdates();
// Informs the service that an extension's files are in place for loading.
// |extension| the extension
// |page_ordinal| the location of the extension in the app launcher
// |install_flags| a bitmask of InstallFlags
// |dnr_ruleset_checksum| Checksum of the indexed ruleset for the Declarative
// Net Request API.
void OnExtensionInstalled(
const Extension* extension,
const syncer::StringOrdinal& page_ordinal,
int install_flags,
const base::Optional<int>& dnr_ruleset_checksum = base::nullopt);
void OnExtensionInstalled(const Extension* extension,
const syncer::StringOrdinal& page_ordinal) {
OnExtensionInstalled(extension, page_ordinal,
// Checks for delayed installation for all pending installs.
void MaybeFinishDelayedInstallations();
// ExtensionHost of background page calls this method right after its render
// view has been created.
void DidCreateRenderViewForBackgroundPage(ExtensionHost* host);
// Record a histogram using the PermissionMessage enum values for each
// permission in |e|.
// NOTE: If this is ever called with high frequency, the implementation may
// need to be made more efficient.
static void RecordPermissionMessagesHistogram(const Extension* extension,
const char* histogram);
// Unloads the given extension and marks the extension as terminated. This
// doesn't notify the user that the extension was terminated, if such a
// notification is desired the calling code is responsible for doing that.
void TerminateExtension(const std::string& extension_id);
// Register self and content settings API with the specified map.
static void RegisterContentSettings(
HostContentSettingsMap* host_content_settings_map,
Profile* profile);
// Adds/Removes update observers.
void AddUpdateObserver(UpdateObserver* observer);
void RemoveUpdateObserver(UpdateObserver* observer);
// Register/unregister an InstallGate with the service.
void RegisterInstallGate(ExtensionPrefs::DelayReason reason,
InstallGate* install_delayer);
void UnregisterInstallGate(InstallGate* install_delayer);
// Simple Accessors
// Returns a WeakPtr to the ExtensionService.
base::WeakPtr<ExtensionService> AsWeakPtr() { return base::AsWeakPtr(this); }
// Returns profile_ as a BrowserContext.
content::BrowserContext* GetBrowserContext() const;
bool extensions_enabled() const { return extensions_enabled_; }
const base::FilePath& install_directory() const { return install_directory_; }
const ExtensionSet* delayed_installs() const { return &delayed_installs_; }
Profile* profile() { return profile_; }
// Note that this may return NULL if autoupdate is not turned on.
ExtensionUpdater* updater() { return updater_.get(); }
ComponentLoader* component_loader() { return component_loader_.get(); }
bool browser_terminating() const { return browser_terminating_; }
SharedModuleService* shared_module_service() {
return shared_module_service_.get();
ExternalInstallManager* external_install_manager() {
return external_install_manager_.get();
// For Testing
// Unload all extensions. Does not send notifications.
void UnloadAllExtensionsForTest();
// Reloads all extensions. Does not notify that extensions are ready.
void ReloadExtensionsForTest();
// Clear all ExternalProviders.
void ClearProvidersForTesting();
// Adds an ExternalProviderInterface for the service to use during testing.
void AddProviderForTesting(
std::unique_ptr<ExternalProviderInterface> test_provider);
// Simulate an extension being blacklisted for tests.
void BlacklistExtensionForTest(const std::string& extension_id);
#if defined(UNIT_TEST)
void FinishInstallationForTest(const Extension* extension) {
void UninstallMigratedExtensionsForTest() { UninstallMigratedExtensions(); }
void set_browser_terminating_for_test(bool value) {
browser_terminating_ = value;
// Set a callback to be called when all external providers are ready and their
// extensions have been installed.
void set_external_updates_finished_callback_for_test(
const base::Closure& callback) {
external_updates_finished_callback_ = callback;
void set_external_updates_disabled_for_test(bool value) {
external_updates_disabled_for_test_ = value;
// Loads extensions specified via a command line flag/switch.
void LoadExtensionsFromCommandLineFlag(const char* switch_name);
// content::NotificationObserver implementation:
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
// Blacklist::Observer implementation.
void OnBlacklistUpdated() override;
// UpgradeObserver implementation.
void OnUpgradeRecommended() override;
// ExtensionRegistrar::Delegate implementation.
void PreAddExtension(const Extension* extension,
const Extension* old_extension) override;
void PostActivateExtension(scoped_refptr<const Extension> extension) override;
void PostDeactivateExtension(
scoped_refptr<const Extension> extension) override;
void LoadExtensionForReload(
const ExtensionId& extension_id,
const base::FilePath& path,
ExtensionRegistrar::LoadErrorBehavior load_error_behavior) override;
bool CanEnableExtension(const Extension* extension) override;
bool CanDisableExtension(const Extension* extension) override;
bool ShouldBlockExtension(const Extension* extension) override;
// ProfileManagerObserver implementation.
void OnProfileMarkedForPermanentDeletion(Profile* profile) override;
// For the extension in |version_path| with |id|, check to see if it's an
// externally managed extension. If so, uninstall it.
void CheckExternalUninstall(const std::string& id);
// Attempt to enable all disabled extensions which the only disabled reason is
// reloading.
void EnabledReloadableExtensions();
// Finish install (if possible) of extensions that were still delayed while
// the browser was shut down.
void MaybeFinishShutdownDelayed();
// Populates greylist_.
void LoadGreylistFromPrefs();
// Signals *ready_ and sends a notification to the listeners.
void SetReadyAndNotifyListeners();
// Returns true if all the external extension providers are ready.
bool AreAllExternalProvidersReady() const;
// Called once all external providers are ready. Checks for unclaimed
// external extensions.
void OnAllExternalProvidersReady();
// Update preferences for a new or updated extension; notify observers that
// the extension is installed, e.g., to update event handlers on background
// pages; and perform other extension install tasks before calling
// AddExtension.
// |install_flags| is a bitmask of InstallFlags.
void AddNewOrUpdatedExtension(
const Extension* extension,
Extension::State initial_state,
int install_flags,
const syncer::StringOrdinal& page_ordinal,
const std::string& install_parameter,
const base::Optional<int>& dnr_ruleset_checksum);
// Common helper to finish installing the given extension.
void FinishInstallation(const Extension* extension);
// Disables the extension if the privilege level has increased
// (e.g., due to an upgrade).
void CheckPermissionsIncrease(const Extension* extension,
bool is_extension_loaded);
// Helper that updates the active extension list used for crash reporting.
void UpdateActiveExtensionsInCrashReporter();
// Helper to get the disable reasons for an installed (or upgraded) extension.
// A return value of disable_reason::DISABLE_NONE indicates that we should
// enable this extension initially.
int GetDisableReasonsOnInstalled(const Extension* extension);
// Helper method to determine if an extension can be blocked.
bool CanBlockExtension(const Extension* extension) const;
// Helper to determine if installing an extensions should proceed immediately,
// or if we should delay the install until further notice, or if the install
// should be aborted. A pending install is delayed or aborted when any of the
// delayers say so and only proceeds when all delayers return INSTALL.
// |extension| is the extension to be installed. |install_immediately| is the
// install flag set with the install. |reason| is the reason associated with
// the install delayer that wants to defer or abort the install.
InstallGate::Action ShouldDelayExtensionInstall(
const Extension* extension,
bool install_immediately,
ExtensionPrefs::DelayReason* reason) const;
// Manages the blacklisted extensions, intended as callback from
// Blacklist::GetBlacklistedIDs.
void ManageBlacklist(const Blacklist::BlacklistStateMap& blacklisted_ids);
// Add extensions in |blacklisted| to blacklisted_extensions, remove
// extensions that are neither in |blacklisted|, nor in |unchanged|.
void UpdateBlacklistedExtensions(const ExtensionIdSet& to_blacklist,
const ExtensionIdSet& unchanged);
void UpdateGreylistedExtensions(
const ExtensionIdSet& greylist,
const ExtensionIdSet& unchanged,
const Blacklist::BlacklistStateMap& state_map);
// Used only by test code.
void UnloadAllExtensionsInternal();
// Disable apps & extensions now to stop them from running after a profile
// has been conceptually deleted. Don't wait for full browser shutdown and
// the actual profile objects to be destroyed.
void OnProfileDestructionStarted();
// Called on file task runner thread to uninstall extension.
static void UninstallExtensionOnFileThread(
const std::string& id,
Profile* profile,
const base::FilePath& install_dir,
const base::FilePath& extension_path);
// Called when the initial extensions load has completed.
void OnInstalledExtensionsLoaded();
// Uninstall extensions that have been migrated to component extensions.
void UninstallMigratedExtensions();
const base::CommandLine* command_line_ = nullptr;
// The normal profile associated with this ExtensionService.
Profile* profile_ = nullptr;
// The ExtensionSystem for the profile above.
ExtensionSystem* system_ = nullptr;
// Preferences for the owning profile.
ExtensionPrefs* extension_prefs_ = nullptr;
// Blacklist for the owning profile.
Blacklist* blacklist_ = nullptr;
// Sets of enabled/disabled/terminated/blacklisted extensions. Not owned.
ExtensionRegistry* registry_ = nullptr;
// Set of greylisted extensions. These extensions are disabled if they are
// already installed in Chromium at the time when they are added to
// the greylist. Unlike blacklisted extensions, greylisted ones are visible
// to the user and if user re-enables such an extension, they remain enabled.
// These extensions should appear in registry_.
ExtensionSet greylist_;
// Set of whitelisted enabled extensions loaded from the
// --disable-extensions-except command line flag.
std::set<std::string> disable_flag_exempted_extensions_;
// The list of extension installs delayed for various reasons. The reason
// for delayed install is stored in ExtensionPrefs. These are not part of
// ExtensionRegistry because they are not yet installed.
ExtensionSet delayed_installs_;
// Hold the set of pending extensions.
PendingExtensionManager pending_extension_manager_;
// The full path to the directory where extensions are installed.
base::FilePath install_directory_;
// Whether or not extensions are enabled.
bool extensions_enabled_ = true;
// Signaled when all extensions are loaded.
base::OneShotEvent* const ready_;
// Our extension updater, if updates are turned on.
std::unique_ptr<ExtensionUpdater> updater_;
content::NotificationRegistrar registrar_;
// Keeps track of loading and unloading component extensions.
std::unique_ptr<ComponentLoader> component_loader_;
// A collection of external extension providers. Each provider reads
// a source of external extension information. Examples include the
// windows registry and external_extensions.json.
ProviderCollection external_extension_providers_;
// Set to true by OnExternalExtensionUpdateUrlFound() when an external
// extension URL is found, and by CheckForUpdatesSoon() when an update check
// has to wait for the external providers. Used in
// OnAllExternalProvidersReady() to determine if an update check is needed to
// install pending extensions.
bool update_once_all_providers_are_ready_ = false;
// A callback to be called when all external providers are ready and their
// extensions have been installed. Normally this is a null callback, but
// is used in external provider related tests.
// TODO(mxnguyen): Change |external_updates_finished_callback_| to
// OnceClosure.
base::Closure external_updates_finished_callback_;
// Set when the browser is terminating. Prevents us from installing or
// updating additional extensions and allows in-progress installations to
// decide to abort.
bool browser_terminating_ = false;
// If set, call to CheckForExternalUpdates() will bail out.
bool external_updates_disabled_for_test_ = false;
// Set to true if this is the first time this ExtensionService has run.
// Used for specially handling external extensions that are installed the
// first time.
bool is_first_run_ = false;
// Set to true if extensions are all to be blocked.
bool block_extensions_ = false;
// The controller for the UI that alerts the user about any blacklisted
// extensions.
std::unique_ptr<ExtensionErrorController> error_controller_;
// The manager for extensions that were externally installed that is
// responsible for prompting the user about suspicious extensions.
std::unique_ptr<ExternalInstallManager> external_install_manager_;
// The SharedModuleService used to check for import dependencies.
std::unique_ptr<SharedModuleService> shared_module_service_;
base::ObserverList<UpdateObserver, true>::Unchecked update_observers_;
// Migrates app data when upgrading a legacy packaged app to a platform app
std::unique_ptr<AppDataMigrator> app_data_migrator_;
// Helper to register and unregister extensions.
ExtensionRegistrar extension_registrar_;
// Tracker of enterprise policy forced installation.
InstallationTracker forced_extensions_tracker_;
ScopedObserver<ProfileManager, ProfileManagerObserver>
using InstallGateRegistry =
std::map<ExtensionPrefs::DelayReason, InstallGate*>;
InstallGateRegistry install_delayer_registry_;
FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest, SetUnsetBlacklistInPrefs);
FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest, ReloadBlacklistedExtension);
FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest, BlacklistedInPrefsFromStartup);
friend class ::BlacklistedExtensionSyncServiceTest;
} // namespace extensions