Restore auto-launched state on kiosk restart within session

chrome/browser/chromeos/login/auto_launched_kiosk_browsertest.cc

+// Copyright 2014 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 <memory>
+#include <string>
+#include <vector>
+
+#include "apps/test/app_window_waiter.h"
+#include "base/base64.h"
+#include "base/command_line.h"
+#include "base/files/file_path.h"
+#include "base/json/json_file_value_serializer.h"
+#include "base/logging.h"
+#include "base/path_service.h"
+#include "base/run_loop.h"
+#include "base/values.h"
+#include "chrome/browser/chrome_notification_types.h"
+#include "chrome/browser/chromeos/app_mode/fake_cws.h"
+#include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
+#include "chrome/browser/chromeos/login/app_launch_controller.h"
+#include "chrome/browser/chromeos/ownership/owner_settings_service_chromeos_factory.h"
+#include "chrome/browser/chromeos/policy/device_local_account.h"
+#include "chrome/browser/chromeos/policy/device_policy_builder.h"
+#include "chrome/browser/chromeos/settings/stub_install_attributes.h"
+#include "chrome/browser/extensions/browsertest_util.h"
+#include "chrome/browser/extensions/extension_apitest.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_paths.h"
+#include "chrome/common/pref_names.h"
+#include "chromeos/dbus/cryptohome_client.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/fake_session_manager_client.h"
+#include "chromeos/dbus/shill_manager_client.h"
+#include "components/ownership/mock_owner_key_util.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/notification_service.h"
+#include "extensions/browser/app_window/app_window.h"
+#include "extensions/browser/app_window/app_window_registry.h"
+#include "extensions/browser/app_window/native_app_window.h"
+#include "extensions/common/value_builder.h"
+#include "extensions/test/extension_test_message_listener.h"
+#include "net/dns/mock_host_resolver.h"
+#include "third_party/cros_system_api/switches/chrome_switches.h"
+
+namespace em = enterprise_management;
+
+namespace chromeos {
+
+namespace {
+
+// This is a simple test app that creates an app window and immediately closes
+// it again. Webstore data json is in
+//   chrome/test/data/chromeos/app_mode/webstore/inlineinstall/
+//       detail/ggbflgnkafappblpkiflbgpmkfdpnhhe
+const char kTestKioskApp[] = "ggbflgnkafappblpkiflbgpmkfdpnhhe";
+
+const char kTestAccountId[] = "enterprise-kiosk-app@localhost";
+
+const char kSessionManagerStateCache[] = "test_session_manager_state.json";
+
+// Keys for values in dictionary used to preserve session manager state.
+const char kLoginArgsKey[] = "login_args";
+const char kExtraArgsKey[] = "extra_args";
+const char kArgNameKey[] = "name";
+const char kArgValueKey[] = "value";
+
+// Default set policy switches.
+const struct {
+  const char* name;
+  const char* value;
+} kDefaultPolicySwitches[] = {{"test_switch_1", ""},
+                              {"test_switch_2", "test_switch_2_value"}};
+
+// Fake session manager implementation that persists its state in local file.
+// It can be used to preserve session state in PRE_ browser tests.
+// Primarily used for testing user/login switches.
+class PersistentSessionManagerClient : public FakeSessionManagerClient {
+ public:
+  PersistentSessionManagerClient() {}
+
+  ~PersistentSessionManagerClient() override {
+    PersistFlagsToFile(backing_file_);
+  }
+
+  // Initializes session state (primarily session flags)- if |backing_file|
+  // exists, the session state is restored from the file value. Otherwise it's
+  // set to the default session state.
+  void Initialize(const base::FilePath& backing_file) {
+    backing_file_ = backing_file;
+
+    if (ExtractFlagsFromFile(backing_file_))
+      return;
+
+    // Failed to extract ached flags - set the default values.
+    login_args_ = {{"login-manager", ""}};
+
+    extra_args_ = {{switches::kPolicySwitchesBegin, ""}};
+    for (size_t i = 0; i < arraysize(kDefaultPolicySwitches); ++i) {
+      extra_args_.push_back(
+          {kDefaultPolicySwitches[i].name, kDefaultPolicySwitches[i].value});
+    }
+    extra_args_.push_back({switches::kPolicySwitchesEnd, ""});
+  }
+
+  void AppendSwitchesToCommandLine(base::CommandLine* command_line) {
+    for (const auto& flag : login_args_)
+      command_line->AppendSwitchASCII(flag.name, flag.value);
+    for (const auto& flag : extra_args_)
+      command_line->AppendSwitchASCII(flag.name, flag.value);
+  }
+
+  void StartSession(const cryptohome::Identification& cryptohome_id) override {
+    FakeSessionManagerClient::StartSession(cryptohome_id);
+
+    std::string user_id_hash =
+        CryptohomeClient::GetStubSanitizedUsername(cryptohome_id);
+    login_args_ = {{"login-user", cryptohome_id.id()},
+                   {"login-profile", user_id_hash}};
+  }
+
+  void StopSession() override {
+    FakeSessionManagerClient::StopSession();
+
+    login_args_ = {{"login-manager", ""}};
+  }
+
+  bool SupportsRestartToApplyUserFlags() const override { return true; }
+
+  void SetFlagsForUser(const cryptohome::Identification& identification,
+                       const std::vector<std::string>& flags) override {
+    extra_args_.clear();
+    FakeSessionManagerClient::SetFlagsForUser(identification, flags);
+
+    std::vector<std::string> argv = {"" /* Empty program */};
+    argv.insert(argv.end(), flags.begin(), flags.end());
+
+    // Parse flag name-value pairs using command line initialization.
+    base::CommandLine cmd_line(base::CommandLine::NO_PROGRAM);
+    cmd_line.InitFromArgv(argv);
+
+    for (const auto& flag : cmd_line.GetSwitches())
+      extra_args_.push_back({flag.first, flag.second});
+  }
+
+ private:
+  // Keeps information about a switch - its name and value.
+  struct Switch {
+    std::string name;
+    std::string value;
+  };
+
+  bool ExtractFlagsFromFile(const base::FilePath& backing_file) {
+    JSONFileValueDeserializer deserializer(backing_file);
+
+    int error_code = 0;
+    std::unique_ptr<base::Value> value =
+        deserializer.Deserialize(&error_code, nullptr);
+    if (error_code != JSONFileValueDeserializer::JSON_NO_ERROR)
+      return false;
+
+    std::unique_ptr<base::DictionaryValue> value_dict =
+        base::DictionaryValue::From(std::move(value));
+    CHECK(value_dict);
+
+    CHECK(InitArgListFromCachedValue(*value_dict, kLoginArgsKey, &login_args_));
+    CHECK(InitArgListFromCachedValue(*value_dict, kExtraArgsKey, &extra_args_));
+    return true;
+  }
+
+  bool PersistFlagsToFile(const base::FilePath& backing_file) {
+    base::DictionaryValue cached_state;
+    cached_state.Set(kLoginArgsKey, GetArgListValue(login_args_));
+    cached_state.Set(kExtraArgsKey, GetArgListValue(extra_args_));
+
+    JSONFileValueSerializer serializer(backing_file);
+    return serializer.Serialize(cached_state);
+  }
+
+  std::unique_ptr<base::ListValue> GetArgListValue(
+      const std::vector<Switch>& args) {
+    std::unique_ptr<base::ListValue> result(new base::ListValue());
+    for (const auto& arg : args) {
+      result->Append(extensions::DictionaryBuilder()
+                         .Set(kArgNameKey, arg.name)
+                         .Set(kArgValueKey, arg.value)
+                         .Build());
+    }
+    return result;
+  }
+
+  bool InitArgListFromCachedValue(const base::DictionaryValue& cache_value,
+                                  const std::string& list_key,
+                                  std::vector<Switch>* arg_list_out) {
+    arg_list_out->clear();
+    const base::ListValue* arg_list_value;
+    if (!cache_value.GetList(list_key, &arg_list_value))
+      return false;
+    for (size_t i = 0; i < arg_list_value->GetSize(); ++i) {
+      const base::DictionaryValue* arg_value;
+      if (!arg_list_value->GetDictionary(i, &arg_value))
+        return false;
+      Switch arg;
+      if (!arg_value->GetStringASCII(kArgNameKey, &arg.name) ||
+          !arg_value->GetStringASCII(kArgValueKey, &arg.value)) {
+        return false;
+      }
+      arg_list_out->push_back(arg);
+    }
+    return true;
+  }
+
+  std::vector<Switch> login_args_;
+  std::vector<Switch> extra_args_;
+
+  base::FilePath backing_file_;
+
+  DISALLOW_COPY_AND_ASSIGN(PersistentSessionManagerClient);
+};
+
+// Used to listen for app termination notification.
+class TerminationObserver : public content::NotificationObserver {
+ public:
+  TerminationObserver() {
+    registrar_.Add(this, chrome::NOTIFICATION_APP_TERMINATING,
+                   content::NotificationService::AllSources());
+  }
+  ~TerminationObserver() override = default;
+
+  // Whether app has been terminated - i.e. whether app termination notification
+  // has been observed.
+  bool terminated() const { return notification_seen_; }
+
+ private:
+  void Observe(int type,
+               const content::NotificationSource& source,
+               const content::NotificationDetails& details) override {
+    ASSERT_EQ(chrome::NOTIFICATION_APP_TERMINATING, type);
+    notification_seen_ = true;
+  }
+
+  bool notification_seen_ = false;
+  content::NotificationRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(TerminationObserver);
+};
+
+}  // namespace
+
+class AutoLaunchedKioskTest : public ExtensionApiTest {
+ public:
+  AutoLaunchedKioskTest()
+      : install_attributes_(
+            chromeos::ScopedStubInstallAttributes::CreateEnterprise(
+                "domain.com",
+                "device_id")),
+        owner_key_util_(new ownership::MockOwnerKeyUtil()),
+        fake_session_manager_(new PersistentSessionManagerClient()),
+        fake_cws_(new FakeCWS) {
+    set_chromeos_user_ = false;
+  }
+
+  ~AutoLaunchedKioskTest() override = default;
+
+  void SetUp() override {
+    ASSERT_TRUE(embedded_test_server()->InitializeAndListen());
+    AppLaunchController::SkipSplashWaitForTesting();
+
+    ExtensionApiTest::SetUp();
+  }
+
+  void SetUpCommandLine(base::CommandLine* command_line) override {
+    fake_cws_->Init(embedded_test_server());
+    fake_cws_->SetUpdateCrx(kTestKioskApp, std::string(kTestKioskApp) + ".crx",
+                            "1.0.0");
+    ExtensionApiTest::SetUpCommandLine(command_line);
+  }
+
+  bool SetUpUserDataDirectory() override {
+    InitDevicePolicy();
+
+    base::FilePath user_data_path;
+    if (!PathService::Get(chrome::DIR_USER_DATA, &user_data_path)) {
+      ADD_FAILURE() << "Unable to get used data dir";
+      return false;
+    }
+
+    if (!CacheDevicePolicyToLocalState(user_data_path))
+      return false;
+
+    // Restore session_manager state and ensure session manager flags are
+    // applied.
+    fake_session_manager_->Initialize(
+        user_data_path.Append(kSessionManagerStateCache));
+    fake_session_manager_->AppendSwitchesToCommandLine(
+        base::CommandLine::ForCurrentProcess());
+
+    return true;
+  }
+
+  void SetUpInProcessBrowserTestFixture() override {
+    host_resolver()->AddRule("*", "127.0.0.1");
+
+    OwnerSettingsServiceChromeOSFactory::GetInstance()
+        ->SetOwnerKeyUtilForTesting(owner_key_util_);
+    owner_key_util_->SetPublicKeyFromPrivateKey(
+        *device_policy_.GetSigningKey());
+
+    fake_session_manager_->set_device_policy(device_policy_.GetBlob());
+    DBusThreadManager::GetSetterForTesting()->SetSessionManagerClient(
+        std::move(fake_session_manager_));
+
+    ExtensionApiTest::SetUpInProcessBrowserTestFixture();
+  }
+
+  void SetUpOnMainThread() override {
+    extensions::browsertest_util::CreateAndInitializeLocalCache();
+
+    embedded_test_server()->StartAcceptingConnections();
+
+    ExtensionApiTest::SetUpOnMainThread();
+  }
+
+  void RunTestOnMainThreadLoop() override {
+    termination_observer_.reset(new TerminationObserver());
+
+    ExtensionApiTest::RunTestOnMainThreadLoop();
+  }
+
+  void TearDownOnMainThread() override {
+    termination_observer_.reset();
+
+    ExtensionApiTest::TearDownOnMainThread();
+  }
+
+  void InitDevicePolicy() {
+    // Create device policy, and cache it to local state.
+    em::DeviceLocalAccountsProto* const device_local_accounts =
+        device_policy_.payload().mutable_device_local_accounts();
+
+    em::DeviceLocalAccountInfoProto* const account =
+        device_local_accounts->add_account();
+    account->set_account_id(kTestAccountId);
+    account->set_type(em::DeviceLocalAccountInfoProto::ACCOUNT_TYPE_KIOSK_APP);
+    account->mutable_kiosk_app()->set_app_id(kTestKioskApp);
+
+    device_local_accounts->set_auto_login_id(kTestAccountId);
+
+    device_policy_.Build();
+  }
+
+  bool CacheDevicePolicyToLocalState(const base::FilePath& user_data_path) {
+    em::PolicyData policy_data;
+    if (!device_policy_.payload().SerializeToString(
+            policy_data.mutable_policy_value())) {
+      ADD_FAILURE() << "Failed to serialize device policy.";
+      return false;
+    }
+    const std::string policy_data_str = policy_data.SerializeAsString();
+    std::string policy_data_encoded;
+    base::Base64Encode(policy_data_str, &policy_data_encoded);
+
+    std::unique_ptr<base::DictionaryValue> local_state =
+        extensions::DictionaryBuilder()
+            .Set(prefs::kDeviceSettingsCache, policy_data_encoded)
+            .Set("PublicAccounts",
+                 extensions::ListBuilder().Append(GetTestAppUserId()).Build())
+            .Build();
+
+    JSONFileValueSerializer serializer(
+        user_data_path.Append(chrome::kLocalStateFilename));
+    if (!serializer.Serialize(*local_state)) {
+      ADD_FAILURE() << "Failed to write local state.";
+      return false;
+    }
+    return true;
+  }
+
+  const std::string GetTestAppUserId() const {
+    return policy::GenerateDeviceLocalAccountUserId(
+        kTestAccountId, policy::DeviceLocalAccount::TYPE_KIOSK_APP);
+  }
+
+  bool CloseAppWindow(const std::string& app_id) {
+    Profile* const app_profile = ProfileManager::GetPrimaryUserProfile();
+    if (!app_profile) {
+      ADD_FAILURE() << "No primary (app) profile.";
+      return false;
+    }
+
+    extensions::AppWindowRegistry* const app_window_registry =
+        extensions::AppWindowRegistry::Get(app_profile);
+    extensions::AppWindow* const window =
+        apps::AppWindowWaiter(app_window_registry, app_id).Wait();
+    if (!window) {
+      ADD_FAILURE() << "No app window found for " << app_id << ".";
+      return false;
+    }
+
+    window->GetBaseWindow()->Close();
+
+    // Wait until the app terminates if it is still running.
+    if (!app_window_registry->GetAppWindowsForApp(app_id).empty())
+      base::RunLoop().Run();
+    return true;
+  }
+
+  bool IsKioskAppAutoLaunched(const std::string& app_id) {
+    KioskAppManager::App app;
+    if (!KioskAppManager::Get()->GetApp(app_id, &app)) {
+      ADD_FAILURE() << "App " << app_id << " not found.";
+      return false;
+    }
+    return app.was_auto_launched_with_zero_delay;
+  }
+
+  void ExpectCommandLineHasDefaultPolicySwitches(
+      const base::CommandLine& cmd_line) {
+    for (size_t i = 0u; i < arraysize(kDefaultPolicySwitches); ++i) {
+      EXPECT_TRUE(cmd_line.HasSwitch(kDefaultPolicySwitches[i].name))
+          << "Missing flag " << kDefaultPolicySwitches[i].name;
+      EXPECT_EQ(kDefaultPolicySwitches[i].value,
+                cmd_line.GetSwitchValueASCII(kDefaultPolicySwitches[i].name))
+          << "Invalid value for switch " << kDefaultPolicySwitches[i].name;
+    }
+  }
+
+ protected:
+  std::unique_ptr<TerminationObserver> termination_observer_;
+
+ private:
+  chromeos::ScopedStubInstallAttributes install_attributes_;
+  policy::DevicePolicyBuilder device_policy_;
+  scoped_refptr<ownership::MockOwnerKeyUtil> owner_key_util_;
+  std::unique_ptr<PersistentSessionManagerClient> fake_session_manager_;
+  std::unique_ptr<FakeCWS> fake_cws_;
+
+  DISALLOW_COPY_AND_ASSIGN(AutoLaunchedKioskTest);
+};
+
+IN_PROC_BROWSER_TEST_F(AutoLaunchedKioskTest, PRE_CrashRestore) {
+  // Verify that Chrome hasn't already exited, e.g. in order to apply user
+  // session flags.
+  ASSERT_FALSE(termination_observer_->terminated());
+
+  // Set up default network connections, so tests think the device is online.
+  DBusThreadManager::Get()
+      ->GetShillManagerClient()
+      ->GetTestInterface()
+      ->SetupDefaultEnvironment();
+
+  // Check that policy flags have not been lost.
+  ExpectCommandLineHasDefaultPolicySwitches(
+      *base::CommandLine::ForCurrentProcess());
+
+  ExtensionTestMessageListener listener("appWindowLoaded", false);
+  EXPECT_TRUE(listener.WaitUntilSatisfied());
+
+  EXPECT_TRUE(IsKioskAppAutoLaunched(kTestKioskApp));
+
+  ASSERT_TRUE(CloseAppWindow(kTestKioskApp));
+}
+
+IN_PROC_BROWSER_TEST_F(AutoLaunchedKioskTest, CrashRestore) {
+  // Verify that Chrome hasn't already exited, e.g. in order to apply user
+  // session flags.
+  ASSERT_FALSE(termination_observer_->terminated());
+
+  ExpectCommandLineHasDefaultPolicySwitches(
+      *base::CommandLine::ForCurrentProcess());
+
+  ExtensionTestMessageListener listener("appWindowLoaded", false);
+  EXPECT_TRUE(listener.WaitUntilSatisfied());
+
+  EXPECT_TRUE(IsKioskAppAutoLaunched(kTestKioskApp));
+
+  ASSERT_TRUE(CloseAppWindow(kTestKioskApp));
+}
+
+}  // namespace chromeos