chrome/browser/chromeos/login/signin/oauth2_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 <map>
#include <memory>
#include <string>
#include <utility>

#include "base/macros.h"
#include "base/run_loop.h"
#include "base/single_thread_task_runner.h"
#include "base/strings/stringprintf.h"
#include "base/synchronization/waitable_event.h"
#include "base/task/post_task.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/chromeos/login/existing_user_controller.h"
#include "chrome/browser/chromeos/login/screens/gaia_view.h"
#include "chrome/browser/chromeos/login/signin/oauth2_login_manager.h"
#include "chrome/browser/chromeos/login/signin/oauth2_login_manager_factory.h"
#include "chrome/browser/chromeos/login/signin_specifics.h"
#include "chrome/browser/chromeos/login/startup_utils.h"
#include "chrome/browser/chromeos/login/test/oobe_base_test.h"
#include "chrome/browser/chromeos/login/ui/login_display_host.h"
#include "chrome/browser/chromeos/login/wizard_controller.h"
#include "chrome/browser/extensions/chrome_extension_test_notification_observer.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "chrome/browser/signin/account_tracker_service_factory.h"
#include "chrome/browser/signin/identity_manager_factory.h"
#include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_tabstrip.h"
#include "chrome/browser/ui/javascript_dialogs/javascript_dialog_tab_helper.h"
#include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/test/base/ui_test_utils.h"
#include "chromeos/login/auth/key.h"
#include "chromeos/login/auth/user_context.h"
#include "components/account_id/account_id.h"
#include "components/browser_sync/browser_sync_switches.h"
#include "components/prefs/pref_service.h"
#include "components/signin/core/browser/account_tracker_service.h"
#include "components/user_manager/user.h"
#include "components/user_manager/user_manager.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/notification_service.h"
#include "content/public/test/browser_test_utils.h"
#include "extensions/browser/process_manager.h"
#include "extensions/test/extension_test_message_listener.h"
#include "extensions/test/result_catcher.h"
#include "google_apis/gaia/oauth2_token_service_delegate.h"
#include "net/cookies/canonical_cookie.h"
#include "net/cookies/cookie_store.h"
#include "net/test/embedded_test_server/http_request.h"
#include "net/test/embedded_test_server/http_response.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_context_getter.h"
#include "services/identity/public/cpp/identity_manager.h"

using net::test_server::BasicHttpResponse;
using net::test_server::HttpRequest;
using net::test_server::HttpResponse;

namespace chromeos {

namespace {

// Email of owner account for test.
const char kTestGaiaId[] = "12345";
const char kTestEmail[] = "username@gmail.com";
const char kTestRawEmail[] = "User.Name@gmail.com";
const char kTestAccountPassword[] = "fake-password";
const char kTestAccountServices[] = "[]";
const char kTestAuthCode[] = "fake-auth-code";
const char kTestGaiaUberToken[] = "fake-uber-token";
const char kTestAuthLoginAccessToken[] = "fake-access-token";
const char kTestRefreshToken[] = "fake-refresh-token";
const char kTestAuthSIDCookie[] = "fake-auth-SID-cookie";
const char kTestAuthLSIDCookie[] = "fake-auth-LSID-cookie";
const char kTestSessionSIDCookie[] = "fake-session-SID-cookie";
const char kTestSessionLSIDCookie[] = "fake-session-LSID-cookie";
const char kTestSession2SIDCookie[] = "fake-session2-SID-cookie";
const char kTestSession2LSIDCookie[] = "fake-session2-LSID-cookie";
const char kTestIdTokenAdvancedProtectionEnabled[] =
    "dummy-header."
    "eyAic2VydmljZXMiOiBbInRpYSJdIH0="  // payload: { "services": ["tia"] }
    ".dummy-signature";
const char kTestIdTokenAdvancedProtectionDisabled[] =
    "dummy-header."
    "eyAic2VydmljZXMiOiBbXSB9"  // payload: { "services": [] }
    ".dummy-signature";

std::string PickAccountId(Profile* profile,
                          const std::string& gaia_id,
                          const std::string& email) {
  return AccountTrackerService::PickAccountIdForAccount(profile->GetPrefs(),
                                                        gaia_id, email);
}

class OAuth2LoginManagerStateWaiter : public OAuth2LoginManager::Observer {
 public:
  explicit OAuth2LoginManagerStateWaiter(Profile* profile)
      : profile_(profile),
        waiting_for_state_(false),
        final_state_(OAuth2LoginManager::SESSION_RESTORE_NOT_STARTED) {}

  void WaitForStates(
      const std::set<OAuth2LoginManager::SessionRestoreState>& states) {
    DCHECK(!waiting_for_state_);
    OAuth2LoginManager* login_manager =
        OAuth2LoginManagerFactory::GetInstance()->GetForProfile(profile_);
    states_ = states;
    if (states_.find(login_manager->state()) != states_.end()) {
      final_state_ = login_manager->state();
      return;
    }

    waiting_for_state_ = true;
    login_manager->AddObserver(this);
    run_loop_ = std::make_unique<base::RunLoop>();
    run_loop_->Run();
    login_manager->RemoveObserver(this);
  }

  OAuth2LoginManager::SessionRestoreState final_state() { return final_state_; }

 private:
  // OAuth2LoginManager::Observer overrides.
  void OnSessionRestoreStateChanged(
      Profile* user_profile,
      OAuth2LoginManager::SessionRestoreState state) override {
    if (!waiting_for_state_)
      return;

    if (states_.find(state) == states_.end())
      return;

    final_state_ = state;
    waiting_for_state_ = false;
    run_loop_->Quit();
  }

  Profile* profile_;
  std::set<OAuth2LoginManager::SessionRestoreState> states_;
  bool waiting_for_state_;
  OAuth2LoginManager::SessionRestoreState final_state_;
  std::unique_ptr<base::RunLoop> run_loop_;

  DISALLOW_COPY_AND_ASSIGN(OAuth2LoginManagerStateWaiter);
};

// Blocks a thread associated with a given |task_runner| on construction and
// unblocks it on destruction.
class ThreadBlocker {
 public:
  explicit ThreadBlocker(base::SingleThreadTaskRunner* task_runner)
      : unblock_event_(new base::WaitableEvent(
            base::WaitableEvent::ResetPolicy::MANUAL,
            base::WaitableEvent::InitialState::NOT_SIGNALED)) {
    task_runner->PostTask(
        FROM_HERE,
        base::BindOnce(&BlockThreadOnThread, base::Owned(unblock_event_)));
  }
  ~ThreadBlocker() { unblock_event_->Signal(); }

 private:
  // Blocks the target thread until |event| is signaled.
  static void BlockThreadOnThread(base::WaitableEvent* event) { event->Wait(); }

  // |unblock_event_| is deleted after BlockThreadOnThread returns.
  base::WaitableEvent* const unblock_event_;

  DISALLOW_COPY_AND_ASSIGN(ThreadBlocker);
};

// Helper class that is added as a RequestMonitor of embedded test server to
// wait for a request to happen and defer it until Unblock is called.
class RequestDeferrer {
 public:
  RequestDeferrer()
      : blocking_event_(base::WaitableEvent::ResetPolicy::MANUAL,
                        base::WaitableEvent::InitialState::NOT_SIGNALED),
        start_event_(base::WaitableEvent::ResetPolicy::MANUAL,
                     base::WaitableEvent::InitialState::NOT_SIGNALED) {}

  void UnblockRequest() { blocking_event_.Signal(); }

  void WaitForRequestToStart() {
    // If we have already served the request, bail out.
    if (start_event_.IsSignaled())
      return;

    run_loop_ = std::make_unique<base::RunLoop>();
    run_loop_->Run();
  }

  void InterceptRequest(const HttpRequest& request) {
    start_event_.Signal();
    base::PostTaskWithTraits(
        FROM_HERE, {content::BrowserThread::UI},
        base::BindOnce(&RequestDeferrer::QuitRunnerOnUIThread,
                       base::Unretained(this)));
    blocking_event_.Wait();
  }

 private:
  void QuitRunnerOnUIThread() {
    if (run_loop_)
      run_loop_->Quit();
  }

  base::WaitableEvent blocking_event_;
  base::WaitableEvent start_event_;
  std::unique_ptr<base::RunLoop> run_loop_;

  DISALLOW_COPY_AND_ASSIGN(RequestDeferrer);
};

}  // namespace

class OAuth2Test : public OobeBaseTest {
 protected:
  OAuth2Test() {}

  // OobeBaseTest overrides.
  void SetUpCommandLine(base::CommandLine* command_line) override {
    OobeBaseTest::SetUpCommandLine(command_line);

    // Disable sync since we don't really need this for these tests and it also
    // makes OAuth2Test.MergeSession test flaky http://crbug.com/408867.
    command_line->AppendSwitch(switches::kDisableSync);
  }

  void RegisterAdditionalRequestHandlers() override {
    embedded_test_server()->RegisterRequestMonitor(
        base::Bind(&OAuth2Test::InterceptRequest, base::Unretained(this)));
  }

  void SetupGaiaServerForNewAccount(bool is_under_advanced_protection) {
    FakeGaia::MergeSessionParams params;
    params.auth_sid_cookie = kTestAuthSIDCookie;
    params.auth_lsid_cookie = kTestAuthLSIDCookie;
    params.auth_code = kTestAuthCode;
    params.refresh_token = kTestRefreshToken;
    params.access_token = kTestAuthLoginAccessToken;
    params.gaia_uber_token = kTestGaiaUberToken;
    params.session_sid_cookie = kTestSessionSIDCookie;
    params.session_lsid_cookie = kTestSessionLSIDCookie;
    params.id_token = is_under_advanced_protection
                          ? kTestIdTokenAdvancedProtectionEnabled
                          : kTestIdTokenAdvancedProtectionDisabled;
    fake_gaia_->SetMergeSessionParams(params);
    SetupFakeGaiaForLogin(kTestEmail, kTestGaiaId, kTestRefreshToken);
  }

  void SetupGaiaServerForUnexpiredAccount() {
    FakeGaia::MergeSessionParams params;
    params.email = kTestEmail;
    fake_gaia_->SetMergeSessionParams(params);
    SetupFakeGaiaForLogin(kTestEmail, kTestGaiaId, kTestRefreshToken);
  }

  void SetupGaiaServerForExpiredAccount() {
    FakeGaia::MergeSessionParams params;
    params.gaia_uber_token = kTestGaiaUberToken;
    params.session_sid_cookie = kTestSession2SIDCookie;
    params.session_lsid_cookie = kTestSession2LSIDCookie;
    fake_gaia_->SetMergeSessionParams(params);
    SetupFakeGaiaForLogin(kTestEmail, kTestGaiaId, kTestRefreshToken);
  }

  void LoginAsExistingUser() {
    content::WindowedNotificationObserver(
        chrome::NOTIFICATION_LOGIN_OR_LOCK_WEBUI_VISIBLE,
        content::NotificationService::AllSources())
        .Wait();

    test::OobeJS().ExpectTrue("!!document.querySelector('#account-picker')");
    test::OobeJS().ExpectTrue("!!document.querySelector('#pod-row')");

    std::string account_id = PickAccountId(
        ProfileManager::GetPrimaryUserProfile(), kTestGaiaId, kTestEmail);

    EXPECT_EQ(GetOAuthStatusFromLocalState(account_id),
              user_manager::User::OAUTH2_TOKEN_STATUS_VALID);

    // Try login.  Primary profile has changed.
    EXPECT_TRUE(
        TryToLogin(AccountId::FromUserEmailGaiaId(kTestEmail, kTestGaiaId),
                   kTestAccountPassword));
    Profile* profile = ProfileManager::GetPrimaryUserProfile();

    // Wait for the session merge to finish.
    WaitForMergeSessionCompletion(OAuth2LoginManager::SESSION_RESTORE_DONE);

    // Check for existence of refresh token.
    identity::IdentityManager* identity_manager =
        IdentityManagerFactory::GetForProfile(profile);
    EXPECT_TRUE(identity_manager->HasAccountWithRefreshToken(account_id));

    EXPECT_EQ(GetOAuthStatusFromLocalState(account_id),
              user_manager::User::OAUTH2_TOKEN_STATUS_VALID);
  }

  bool TryToLogin(const AccountId& account_id, const std::string& password) {
    if (!AddUserToSession(account_id, password))
      return false;

    if (const user_manager::User* active_user =
            user_manager::UserManager::Get()->GetActiveUser()) {
      return active_user->GetAccountId() == account_id;
    }

    return false;
  }

  user_manager::User::OAuthTokenStatus GetOAuthStatusFromLocalState(
      const std::string& account_id) const {
    PrefService* local_state = g_browser_process->local_state();
    const base::DictionaryValue* prefs_oauth_status =
        local_state->GetDictionary("OAuthTokenStatus");
    int oauth_token_status = user_manager::User::OAUTH_TOKEN_STATUS_UNKNOWN;
    if (prefs_oauth_status &&
        prefs_oauth_status->GetIntegerWithoutPathExpansion(
            account_id, &oauth_token_status)) {
      user_manager::User::OAuthTokenStatus result =
          static_cast<user_manager::User::OAuthTokenStatus>(oauth_token_status);
      return result;
    }
    return user_manager::User::OAUTH_TOKEN_STATUS_UNKNOWN;
  }

 protected:
  // OobeBaseTest overrides.
  Profile* profile() override {
    if (user_manager::UserManager::Get()->GetActiveUser())
      return ProfileManager::GetPrimaryUserProfile();

    return OobeBaseTest::profile();
  }

  bool AddUserToSession(const AccountId& account_id,
                        const std::string& password) {
    ExistingUserController* controller =
        ExistingUserController::current_controller();
    if (!controller) {
      ADD_FAILURE();
      return false;
    }

    UserContext user_context(user_manager::UserType::USER_TYPE_REGULAR,
                             account_id);
    user_context.SetKey(Key(password));
    controller->Login(user_context, SigninSpecifics());
    content::WindowedNotificationObserver(
        chrome::NOTIFICATION_SESSION_STARTED,
        content::NotificationService::AllSources())
        .Wait();
    const user_manager::UserList& logged_users =
        user_manager::UserManager::Get()->GetLoggedInUsers();
    for (user_manager::UserList::const_iterator it = logged_users.begin();
         it != logged_users.end(); ++it) {
      if ((*it)->GetAccountId() == account_id)
        return true;
    }
    return false;
  }

  void CheckSessionState(OAuth2LoginManager::SessionRestoreState state) {
    OAuth2LoginManager* login_manager =
        OAuth2LoginManagerFactory::GetInstance()->GetForProfile(profile());
    ASSERT_EQ(state, login_manager->state());
  }

  void WaitForMergeSessionCompletion(
      OAuth2LoginManager::SessionRestoreState final_state) {
    // Wait for the session merge to finish.
    std::set<OAuth2LoginManager::SessionRestoreState> states;
    states.insert(OAuth2LoginManager::SESSION_RESTORE_DONE);
    states.insert(OAuth2LoginManager::SESSION_RESTORE_FAILED);
    states.insert(OAuth2LoginManager::SESSION_RESTORE_CONNECTION_FAILED);
    OAuth2LoginManagerStateWaiter merge_session_waiter(profile());
    merge_session_waiter.WaitForStates(states);
    EXPECT_EQ(merge_session_waiter.final_state(), final_state);
  }

  void StartNewUserSession(bool wait_for_merge,
                           bool is_under_advanced_protection) {
    SetupGaiaServerForNewAccount(is_under_advanced_protection);
    SimulateNetworkOnline();
    WaitForGaiaPageLoad();

    content::WindowedNotificationObserver session_start_waiter(
        chrome::NOTIFICATION_SESSION_STARTED,
        content::NotificationService::AllSources());

    // Use capitalized and dotted user name on purpose to make sure
    // our email normalization kicks in.
    LoginDisplayHost::default_host()
        ->GetOobeUI()
        ->GetGaiaScreenView()
        ->ShowSigninScreenForTest(kTestRawEmail, kTestAccountPassword,
                                  kTestAccountServices);
    session_start_waiter.Wait();

    if (wait_for_merge) {
      // Wait for the session merge to finish.
      WaitForMergeSessionCompletion(OAuth2LoginManager::SESSION_RESTORE_DONE);
    }
  }

  OAuth2LoginManager::SessionRestoreStrategy GetSessionRestoreStrategy() {
    OAuth2LoginManager* login_manager =
        OAuth2LoginManagerFactory::GetInstance()->GetForProfile(profile());
    return login_manager->restore_strategy_;
  }

  void InterceptRequest(const HttpRequest& request) {
    const GURL request_url =
        GURL("http://localhost").Resolve(request.relative_url);
    auto it = request_deferers_.find(request_url.path());
    if (it == request_deferers_.end())
      return;

    it->second->InterceptRequest(request);
  }

  void AddRequestDeferer(const std::string& path,
                         RequestDeferrer* request_deferer) {
    DCHECK(request_deferers_.find(path) == request_deferers_.end());
    request_deferers_[path] = request_deferer;
  }

 private:
  std::map<std::string, RequestDeferrer*> request_deferers_;

  DISALLOW_COPY_AND_ASSIGN(OAuth2Test);
};

class CookieReader : public base::RefCountedThreadSafe<CookieReader> {
 public:
  CookieReader() {}

  void ReadCookies(Profile* profile) {
    context_ = profile->GetRequestContext();
    base::PostTaskWithTraits(
        FROM_HERE, {content::BrowserThread::IO},
        base::BindOnce(&CookieReader::ReadCookiesOnIOThread, this));
    run_loop_ = std::make_unique<base::RunLoop>();
    run_loop_->Run();
  }

  std::string GetCookieValue(const std::string& name) {
    for (std::vector<net::CanonicalCookie>::const_iterator iter =
             cookie_list_.begin();
         iter != cookie_list_.end(); ++iter) {
      if (iter->Name() == name) {
        return iter->Value();
      }
    }
    return std::string();
  }

 private:
  friend class base::RefCountedThreadSafe<CookieReader>;

  virtual ~CookieReader() {}

  void ReadCookiesOnIOThread() {
    context_->GetURLRequestContext()->cookie_store()->GetAllCookiesAsync(
        base::BindOnce(&CookieReader::OnGetAllCookiesOnUIThread, this));
  }

  void OnGetAllCookiesOnUIThread(const net::CookieList& cookies) {
    cookie_list_ = cookies;
    base::PostTaskWithTraits(
        FROM_HERE, {content::BrowserThread::UI},
        base::BindOnce(&CookieReader::OnCookiesReadyOnUIThread, this));
  }

  void OnCookiesReadyOnUIThread() { run_loop_->Quit(); }

  scoped_refptr<net::URLRequestContextGetter> context_;
  net::CookieList cookie_list_;
  std::unique_ptr<base::RunLoop> run_loop_;

  DISALLOW_COPY_AND_ASSIGN(CookieReader);
};

// PRE_MergeSession is testing merge session for a new profile.
IN_PROC_BROWSER_TEST_F(OAuth2Test, PRE_PRE_PRE_MergeSession) {
  StartNewUserSession(/*wait_for_merge=*/true,
                      /*is_under_advanced_protection=*/false);
  // Check for existence of refresh token.
  std::string account_id = PickAccountId(profile(), kTestGaiaId, kTestEmail);
  identity::IdentityManager* identity_manager =
      IdentityManagerFactory::GetForProfile(profile());
  EXPECT_TRUE(identity_manager->HasAccountWithRefreshToken(account_id));

  EXPECT_EQ(GetOAuthStatusFromLocalState(account_id),
            user_manager::User::OAUTH2_TOKEN_STATUS_VALID);
  scoped_refptr<CookieReader> cookie_reader(new CookieReader());
  cookie_reader->ReadCookies(profile());
  EXPECT_EQ(cookie_reader->GetCookieValue("SID"), kTestSessionSIDCookie);
  EXPECT_EQ(cookie_reader->GetCookieValue("LSID"), kTestSessionLSIDCookie);
}

// MergeSession test is running merge session process for an existing profile
// that was generated in PRE_PRE_PRE_MergeSession test. In this test, we
// are not running /MergeSession process since the /ListAccounts call confirms
// that the session is not stale.
IN_PROC_BROWSER_TEST_F(OAuth2Test, PRE_PRE_MergeSession) {
  SetupGaiaServerForUnexpiredAccount();
  SimulateNetworkOnline();
  LoginAsExistingUser();
  scoped_refptr<CookieReader> cookie_reader(new CookieReader());
  cookie_reader->ReadCookies(profile());
  // These are still cookie values from the initial session since
  // /ListAccounts
  EXPECT_EQ(cookie_reader->GetCookieValue("SID"), kTestSessionSIDCookie);
  EXPECT_EQ(cookie_reader->GetCookieValue("LSID"), kTestSessionLSIDCookie);
}

// MergeSession test is running merge session process for an existing profile
// that was generated in PRE_PRE_MergeSession test.
// Disabled due to flakiness: crbug.com/496832
IN_PROC_BROWSER_TEST_F(OAuth2Test, DISABLED_PRE_MergeSession) {
  SetupGaiaServerForExpiredAccount();
  SimulateNetworkOnline();
  LoginAsExistingUser();
  scoped_refptr<CookieReader> cookie_reader(new CookieReader());
  cookie_reader->ReadCookies(profile());
  // These should be cookie values that we generated by calling /MergeSession,
  // since /ListAccounts should have tell us that the initial session cookies
  // are stale.
  EXPECT_EQ(cookie_reader->GetCookieValue("SID"), kTestSession2SIDCookie);
  EXPECT_EQ(cookie_reader->GetCookieValue("LSID"), kTestSession2LSIDCookie);
}

// MergeSession test is attempting to merge session for an existing profile
// that was generated in PRE_PRE_MergeSession test. This attempt should fail
// since FakeGaia instance isn't configured to return relevant tokens/cookies.
// Disabled due to flakiness: crbug.com/496832
IN_PROC_BROWSER_TEST_F(OAuth2Test, DISABLED_MergeSession) {
  SimulateNetworkOnline();

  content::WindowedNotificationObserver(
      chrome::NOTIFICATION_LOGIN_OR_LOCK_WEBUI_VISIBLE,
      content::NotificationService::AllSources())
      .Wait();

  test::OobeJS().ExpectTrue("!!document.querySelector('#account-picker')");
  test::OobeJS().ExpectTrue("!!document.querySelector('#pod-row')");

  std::string account_id = PickAccountId(profile(), kTestGaiaId, kTestEmail);
  EXPECT_EQ(GetOAuthStatusFromLocalState(account_id),
            user_manager::User::OAUTH2_TOKEN_STATUS_VALID);

  EXPECT_TRUE(
      TryToLogin(AccountId::FromUserEmailGaiaId(kTestEmail, kTestGaiaId),
                 kTestAccountPassword));

  // Wait for the session merge to finish.
  WaitForMergeSessionCompletion(OAuth2LoginManager::SESSION_RESTORE_FAILED);

  EXPECT_EQ(GetOAuthStatusFromLocalState(account_id),
            user_manager::User::OAUTH2_TOKEN_STATUS_INVALID);
}

// Sets up a new user with stored refresh token.
IN_PROC_BROWSER_TEST_F(OAuth2Test, PRE_OverlappingContinueSessionRestore) {
  StartNewUserSession(/*wait_for_merge=*/true,
                      /*is_under_advanced_protection=*/false);
}

// Tests that ContinueSessionRestore could be called multiple times.
IN_PROC_BROWSER_TEST_F(OAuth2Test, DISABLED_OverlappingContinueSessionRestore) {
  SetupGaiaServerForUnexpiredAccount();
  SimulateNetworkOnline();

  // Waits for login screen to be ready.
  content::WindowedNotificationObserver(
      chrome::NOTIFICATION_LOGIN_OR_LOCK_WEBUI_VISIBLE,
      content::NotificationService::AllSources())
      .Wait();

  // Blocks database thread to control TokenService::LoadCredentials timing.
  // TODO(achuith): Fix this. crbug.com/753615.
  auto thread_blocker = std::make_unique<ThreadBlocker>(nullptr);

  // Signs in as the existing user created in pre test.
  EXPECT_TRUE(
      TryToLogin(AccountId::FromUserEmailGaiaId(kTestEmail, kTestGaiaId),
                 kTestAccountPassword));

  // Session restore should be using the saved tokens.
  EXPECT_EQ(OAuth2LoginManager::RESTORE_FROM_SAVED_OAUTH2_REFRESH_TOKEN,
            GetSessionRestoreStrategy());

  // Checks that refresh token is not yet loaded.
  identity::IdentityManager* identity_manager =
      IdentityManagerFactory::GetForProfile(profile());
  const std::string account_id =
      PickAccountId(profile(), kTestGaiaId, kTestEmail);
  EXPECT_FALSE(identity_manager->HasAccountWithRefreshToken(account_id));

  // Invokes ContinueSessionRestore multiple times and there should be
  // no DCHECK failures.
  OAuth2LoginManager* login_manager =
      OAuth2LoginManagerFactory::GetInstance()->GetForProfile(profile());
  login_manager->ContinueSessionRestore();
  login_manager->ContinueSessionRestore();

  // Let go DB thread to finish TokenService::LoadCredentials.
  thread_blocker.reset();

  // Session restore can finish normally and token is loaded.
  WaitForMergeSessionCompletion(OAuth2LoginManager::SESSION_RESTORE_DONE);
  EXPECT_TRUE(identity_manager->HasAccountWithRefreshToken(account_id));
}

// Tests that user session is terminated if merge session fails for an online
// sign-in. This is necessary to prevent policy exploit.
// See http://crbug.com/677312
IN_PROC_BROWSER_TEST_F(OAuth2Test, TerminateOnBadMergeSessionAfterOnlineAuth) {
  SimulateNetworkOnline();
  WaitForGaiaPageLoad();

  content::WindowedNotificationObserver termination_waiter(
      chrome::NOTIFICATION_APP_TERMINATING,
      content::NotificationService::AllSources());

  // Configure FakeGaia so that online auth succeeds but merge session fails.
  FakeGaia::MergeSessionParams params;
  params.auth_sid_cookie = kTestAuthSIDCookie;
  params.auth_lsid_cookie = kTestAuthLSIDCookie;
  params.auth_code = kTestAuthCode;
  params.refresh_token = kTestRefreshToken;
  params.access_token = kTestAuthLoginAccessToken;
  fake_gaia_->SetMergeSessionParams(params);

  // Simulate an online sign-in.
  LoginDisplayHost::default_host()
      ->GetOobeUI()
      ->GetGaiaScreenView()
      ->ShowSigninScreenForTest(kTestRawEmail, kTestAccountPassword,
                                kTestAccountServices);

  // User session should be terminated.
  termination_waiter.Wait();

  // Merge session should fail. Check after |termination_waiter| to ensure
  // user profile is initialized and there is an OAuth2LoginManage.
  WaitForMergeSessionCompletion(OAuth2LoginManager::SESSION_RESTORE_FAILED);
}

IN_PROC_BROWSER_TEST_F(OAuth2Test, VerifyInAdvancedProtectionAfterOnlineAuth) {
  StartNewUserSession(/*wait_for_merge=*/true,
                      /*is_under_advanced_protection=*/true);

  // Verify that AccountInfo is properly updated.
  AccountTrackerService* account_tracker =
      AccountTrackerServiceFactory::GetInstance()->GetForProfile(profile());
  EXPECT_TRUE(
      account_tracker->GetAccountInfo(kTestEmail).is_under_advanced_protection);
}

IN_PROC_BROWSER_TEST_F(OAuth2Test,
                       VerifyNotInAdvancedProtectionAfterOnlineAuth) {
  StartNewUserSession(/*wait_for_merge=*/true,
                      /*is_under_advanced_protection=*/false);

  // Verify that AccountInfo is properly updated.
  AccountTrackerService* account_tracker =
      AccountTrackerServiceFactory::GetInstance()->GetForProfile(profile());
  EXPECT_FALSE(
      account_tracker->GetAccountInfo(kTestEmail).is_under_advanced_protection);
}

// Sets up a new user with stored refresh token.
IN_PROC_BROWSER_TEST_F(OAuth2Test, PRE_SetInvalidTokenStatus) {
  StartNewUserSession(/*wait_for_merge=*/true,
                      /*is_under_advanced_protection=*/false);
}

// Tests that an auth error marks invalid auth token status despite
// OAuth2LoginManager thinks merge session is done successfully
IN_PROC_BROWSER_TEST_F(OAuth2Test, SetInvalidTokenStatus) {
  RequestDeferrer list_accounts_request_deferer;
  AddRequestDeferer("/ListAccounts", &list_accounts_request_deferer);

  SetupGaiaServerForUnexpiredAccount();
  SimulateNetworkOnline();

  // Waits for login screen to be ready.
  content::WindowedNotificationObserver(
      chrome::NOTIFICATION_LOGIN_OR_LOCK_WEBUI_VISIBLE,
      content::NotificationService::AllSources())
      .Wait();

  // Signs in as the existing user created in pre test.
  ExistingUserController* const controller =
      ExistingUserController::current_controller();
  UserContext user_context(
      user_manager::USER_TYPE_REGULAR,
      AccountId::FromUserEmailGaiaId(kTestEmail, kTestGaiaId));
  user_context.SetKey(Key(kTestAccountPassword));
  controller->Login(user_context, SigninSpecifics());

  // Wait until /ListAccounts request happens so that an auth error can be
  // generated after user profile is available but before merge session
  // finishes.
  list_accounts_request_deferer.WaitForRequestToStart();

  // Make sure that merge session is not finished.
  OAuth2LoginManager* const login_manager =
      OAuth2LoginManagerFactory::GetInstance()->GetForProfile(profile());
  ASSERT_NE(OAuth2LoginManager::SESSION_RESTORE_DONE, login_manager->state());

  // Generate an auth error.
  ProfileOAuth2TokenServiceFactory::GetForProfile(profile())->UpdateCredentials(
      kTestEmail, OAuth2TokenServiceDelegate::kInvalidRefreshToken);

  // Let go /ListAccounts request.
  list_accounts_request_deferer.UnblockRequest();

  // Wait for the session merge to finish with success.
  WaitForMergeSessionCompletion(OAuth2LoginManager::SESSION_RESTORE_DONE);

  // User oauth2 token status should be marked as invalid because of auth error
  // and regardless of the merge session outcome.
  EXPECT_EQ(GetOAuthStatusFromLocalState(kTestEmail),
            user_manager::User::OAUTH2_TOKEN_STATUS_INVALID);
}

constexpr char kGooglePageContent[] =
    "<html><title>Hello!</title><script>alert('hello');</script>"
    "<body>Hello Google!</body></html>";
constexpr char kRandomPageContent[] =
    "<html><title>SomthingElse</title><body>I am SomethingElse</body></html>";
constexpr char kHelloPagePath[] = "/hello_google";
constexpr char kRandomPagePath[] = "/non_google_page";

// FakeGoogle serves content of http://www.google.com/hello_google page for
// merge session tests.
class FakeGoogle {
 public:
  FakeGoogle()
      : start_event_(base::WaitableEvent::ResetPolicy::MANUAL,
                     base::WaitableEvent::InitialState::NOT_SIGNALED) {}

  ~FakeGoogle() {}

  std::unique_ptr<HttpResponse> HandleRequest(const HttpRequest& request) {
    // The scheme and host of the URL is actually not important but required to
    // get a valid GURL in order to parse |request.relative_url|.
    GURL request_url = GURL("http://localhost").Resolve(request.relative_url);
    LOG(WARNING) << "Requesting page " << request.relative_url;
    std::string request_path = request_url.path();
    std::unique_ptr<BasicHttpResponse> http_response(new BasicHttpResponse());
    if (request_path == kHelloPagePath) {  // Serving "google" page.
      start_event_.Signal();
      base::PostTaskWithTraits(FROM_HERE, {content::BrowserThread::UI},
                               base::BindOnce(&FakeGoogle::QuitRunnerOnUIThread,
                                              base::Unretained(this)));

      http_response->set_code(net::HTTP_OK);
      http_response->set_content_type("text/html");
      http_response->set_content(kGooglePageContent);
    } else if (request_path == kRandomPagePath) {  // Serving "non-google" page.
      http_response->set_code(net::HTTP_OK);
      http_response->set_content_type("text/html");
      http_response->set_content(kRandomPageContent);
    } else {
      return std::unique_ptr<HttpResponse>();  // Request not understood.
    }

    return std::move(http_response);
  }

  // True if we have already served the test page.
  bool IsPageRequested() { return start_event_.IsSignaled(); }

  // Waits until we receive a request to serve the test page.
  void WaitForPageRequest() {
    // If we have already served the request, bail out.
    if (start_event_.IsSignaled())
      return;

    run_loop_ = std::make_unique<base::RunLoop>();
    run_loop_->Run();
  }

 private:
  void QuitRunnerOnUIThread() {
    if (run_loop_)
      run_loop_->Quit();
  }
  // This event will tell us when we actually see HTTP request on the server
  // side. It should be signalled only after the page/XHR throttle had been
  // removed (after merge session completes).
  base::WaitableEvent start_event_;
  std::unique_ptr<base::RunLoop> run_loop_;

  DISALLOW_COPY_AND_ASSIGN(FakeGoogle);
};

class MergeSessionTest : public OAuth2Test {
 protected:
  MergeSessionTest() = default;

  // OAuth2Test overrides.
  void SetUpCommandLine(base::CommandLine* command_line) override {
    OAuth2Test::SetUpCommandLine(command_line);

    // Get fake URL for fake google.com.
    const GURL& server_url = embedded_test_server()->base_url();
    GURL::Replacements replace_google_host;
    replace_google_host.SetHostStr("www.google.com");
    GURL google_url = server_url.ReplaceComponents(replace_google_host);
    fake_google_page_url_ = google_url.Resolve(kHelloPagePath);

    GURL::Replacements replace_non_google_host;
    replace_non_google_host.SetHostStr("www.somethingelse.org");
    GURL non_google_url = server_url.ReplaceComponents(replace_non_google_host);
    non_google_page_url_ = non_google_url.Resolve(kRandomPagePath);
  }

  void RegisterAdditionalRequestHandlers() override {
    OAuth2Test::RegisterAdditionalRequestHandlers();
    AddRequestDeferer("/MergeSession", &merge_session_deferer_);

    embedded_test_server()->RegisterRequestHandler(base::Bind(
        &FakeGoogle::HandleRequest, base::Unretained(&fake_google_)));
  }

 protected:
  void UnblockMergeSession() { merge_session_deferer_.UnblockRequest(); }

  void WaitForMergeSessionToStart() {
    merge_session_deferer_.WaitForRequestToStart();
  }

  void JsExpect(content::WebContents* contents, const std::string& expression) {
    bool result;
    ASSERT_TRUE(content::ExecuteScriptAndExtractBool(
        contents,
        "window.domAutomationController.send(!!(" + expression + "));",
        &result));
    ASSERT_TRUE(result) << expression;
  }

  const GURL& GetBackGroundPageUrl(const std::string& extension_id) {
    extensions::ProcessManager* manager =
        extensions::ProcessManager::Get(profile());
    extensions::ExtensionHost* host =
        manager->GetBackgroundHostForExtension(extension_id);
    return host->host_contents()->GetURL();
  }

  void JsExpectOnBackgroundPage(const std::string& extension_id,
                                const std::string& expression) {
    extensions::ProcessManager* manager =
        extensions::ProcessManager::Get(profile());
    extensions::ExtensionHost* host =
        manager->GetBackgroundHostForExtension(extension_id);
    if (host == NULL) {
      ADD_FAILURE() << "Extension " << extension_id
                    << " has no background page.";
      return;
    }

    JsExpect(host->host_contents(), expression);
  }

  FakeGoogle fake_google_;
  RequestDeferrer merge_session_deferer_;
  GURL fake_google_page_url_;
  GURL non_google_page_url_;

 private:
  DISALLOW_COPY_AND_ASSIGN(MergeSessionTest);
};

Browser* FindOrCreateVisibleBrowser(Profile* profile) {
  chrome::ScopedTabbedBrowserDisplayer displayer(profile);
  Browser* browser = displayer.browser();
  if (browser->tab_strip_model()->count() == 0)
    chrome::AddTabAt(browser, GURL(), -1, true);
  return browser;
}

IN_PROC_BROWSER_TEST_F(MergeSessionTest, PageThrottle) {
  StartNewUserSession(/*wait_for_merge=*/false,
                      /*is_under_advanced_protection=*/false);

  // Try to open a page from google.com.
  Browser* browser = FindOrCreateVisibleBrowser(profile());
  ui_test_utils::NavigateToURLWithDisposition(
      browser, fake_google_page_url_, WindowOpenDisposition::CURRENT_TAB,
      ui_test_utils::BROWSER_TEST_NONE);

  // JavaScript dialog wait setup.
  content::WebContents* tab =
      browser->tab_strip_model()->GetActiveWebContents();
  JavaScriptDialogTabHelper* js_helper =
      JavaScriptDialogTabHelper::FromWebContents(tab);
  base::RunLoop dialog_wait;
  js_helper->SetDialogShownCallbackForTesting(dialog_wait.QuitClosure());

  // Wait until we get send merge session request.
  WaitForMergeSessionToStart();

  // Make sure the page is blocked by the throttle.
  EXPECT_FALSE(fake_google_.IsPageRequested());

  // Check that throttle page is displayed instead.
  base::string16 title;
  ui_test_utils::GetCurrentTabTitle(browser, &title);
  DVLOG(1) << "Loaded page at the start : " << title;

  // Unblock GAIA request.
  UnblockMergeSession();

  // Wait for the session merge to finish.
  WaitForMergeSessionCompletion(OAuth2LoginManager::SESSION_RESTORE_DONE);

  // Make sure the test page is served.
  fake_google_.WaitForPageRequest();

  // Check that real page is no longer blocked by the throttle and that the
  // real page pops up JS dialog.
  dialog_wait.Run();
  js_helper->HandleJavaScriptDialog(tab, true, nullptr);

  ui_test_utils::GetCurrentTabTitle(browser, &title);
  DVLOG(1) << "Loaded page at the end : " << title;
}

IN_PROC_BROWSER_TEST_F(MergeSessionTest, XHRThrottle) {
  StartNewUserSession(/*wait_for_merge=*/false,
                      /*is_under_advanced_protection=*/false);

  // Wait until we get send merge session request.
  WaitForMergeSessionToStart();

  // Reset ExtensionBrowserTest::observer_ to the right browser object.
  Browser* browser = FindOrCreateVisibleBrowser(profile());
  observer_.reset(
      new extensions::ChromeExtensionTestNotificationObserver(browser));

  // Run background page tests. The tests will just wait for XHR request
  // to complete.
  extensions::ResultCatcher catcher;

  std::unique_ptr<ExtensionTestMessageListener> non_google_xhr_listener(
      new ExtensionTestMessageListener("non-google-xhr-received", false));

  // Load extension with a background page. The background page will
  // attempt to load |fake_google_page_url_| via XHR.
  const extensions::Extension* ext =
      LoadExtension(test_data_dir_.AppendASCII("merge_session"));
  ASSERT_TRUE(ext);

  // Kick off XHR request from the extension.
  JsExpectOnBackgroundPage(
      ext->id(), base::StringPrintf("startThrottledTests('%s', '%s')",
                                    fake_google_page_url_.spec().c_str(),
                                    non_google_page_url_.spec().c_str()));

  // Verify that we've sent XHR request from the extension side...
  JsExpectOnBackgroundPage(ext->id(),
                           "googleRequestSent && !googleResponseReceived");

  // ...but didn't see it on the server side yet.
  EXPECT_FALSE(fake_google_.IsPageRequested());

  // Unblock GAIA request.
  UnblockMergeSession();

  // Wait for the session merge to finish.
  WaitForMergeSessionCompletion(OAuth2LoginManager::SESSION_RESTORE_DONE);

  // Wait until non-google XHR content to load first.
  ASSERT_TRUE(non_google_xhr_listener->WaitUntilSatisfied());

  if (!catcher.GetNextResult()) {
    std::string message = catcher.message();
    ADD_FAILURE() << "Tests failed: " << message;
  }

  EXPECT_TRUE(fake_google_.IsPageRequested());
}

}  // namespace chromeos