chrome/browser/chromeos/app_mode/kiosk_profile_loader.cc

   1 // Copyright 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/chromeos/app_mode/kiosk_profile_loader.h"
   6
   7 #include "base/logging.h"
   8 #include "base/memory/weak_ptr.h"
   9 #include "base/message_loop/message_loop.h"
  10 #include "base/strings/string_util.h"
  11 #include "base/sys_info.h"
  12 #include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
  13 #include "chrome/browser/chromeos/login/auth/chrome_login_performer.h"
  14 #include "chrome/browser/chromeos/login/demo_mode/demo_app_launcher.h"
  15 #include "chrome/browser/chromeos/login/login_utils.h"
  16 #include "chrome/browser/chromeos/login/ui/login_display_host_impl.h"
  17 #include "chrome/browser/chromeos/settings/cros_settings.h"
  18 #include "chrome/browser/lifetime/application_lifetime.h"
  19 #include "chromeos/cryptohome/async_method_caller.h"
  20 #include "chromeos/dbus/cryptohome_client.h"
  21 #include "chromeos/dbus/dbus_thread_manager.h"
  22 #include "chromeos/login/auth/auth_status_consumer.h"
  23 #include "chromeos/login/auth/user_context.h"
  24 #include "chromeos/login/user_names.h"
  25 #include "content/public/browser/browser_thread.h"
  26 #include "google_apis/gaia/gaia_auth_util.h"
  27
  28 using content::BrowserThread;
  29
  30 namespace chromeos {
  31
  32 namespace {
  33
  34 KioskAppLaunchError::Error LoginFailureToKioskAppLaunchError(
  35     const AuthFailure& error) {
  36   switch (error.reason()) {
  37     case AuthFailure::COULD_NOT_MOUNT_TMPFS:
  38     case AuthFailure::COULD_NOT_MOUNT_CRYPTOHOME:
  39       return KioskAppLaunchError::UNABLE_TO_MOUNT;
  40     case AuthFailure::DATA_REMOVAL_FAILED:
  41       return KioskAppLaunchError::UNABLE_TO_REMOVE;
  42     case AuthFailure::USERNAME_HASH_FAILED:
  43       return KioskAppLaunchError::UNABLE_TO_RETRIEVE_HASH;
  44     default:
  45       NOTREACHED();
  46       return KioskAppLaunchError::UNABLE_TO_MOUNT;
  47   }
  48 }
  49
  50 }  // namespace
  51
  52 ////////////////////////////////////////////////////////////////////////////////
  53 // KioskProfileLoader::CryptohomedChecker ensures cryptohome daemon is up
  54 // and running by issuing an IsMounted call. If the call does not go through
  55 // and chromeos::DBUS_METHOD_CALL_SUCCESS is not returned, it will retry after
  56 // some time out and at the maximum five times before it gives up. Upon
  57 // success, it resumes the launch by logging in as a kiosk mode account.
  58
  59 class KioskProfileLoader::CryptohomedChecker
  60     : public base::SupportsWeakPtr<CryptohomedChecker> {
  61  public:
  62   explicit CryptohomedChecker(KioskProfileLoader* loader)
  63       : loader_(loader),
  64         retry_count_(0) {
  65   }
  66   ~CryptohomedChecker() {}
  67
  68   void StartCheck() {
  69     chromeos::DBusThreadManager::Get()->GetCryptohomeClient()->IsMounted(
  70         base::Bind(&CryptohomedChecker::OnCryptohomeIsMounted,
  71                    AsWeakPtr()));
  72   }
  73
  74  private:
  75   void OnCryptohomeIsMounted(chromeos::DBusMethodCallStatus call_status,
  76                              bool is_mounted) {
  77     if (call_status != chromeos::DBUS_METHOD_CALL_SUCCESS) {
  78       const int kMaxRetryTimes = 5;
  79       ++retry_count_;
  80       if (retry_count_ > kMaxRetryTimes) {
  81         LOG(ERROR) << "Could not talk to cryptohomed for launching kiosk app.";
  82         ReportCheckResult(KioskAppLaunchError::CRYPTOHOMED_NOT_RUNNING);
  83         return;
  84       }
  85
  86       const int retry_delay_in_milliseconds = 500 * (1 << retry_count_);
  87       base::MessageLoop::current()->PostDelayedTask(
  88           FROM_HERE,
  89           base::Bind(&CryptohomedChecker::StartCheck, AsWeakPtr()),
  90           base::TimeDelta::FromMilliseconds(retry_delay_in_milliseconds));
  91       return;
  92     }
  93
  94     if (is_mounted)
  95       LOG(ERROR) << "Cryptohome is mounted before launching kiosk app.";
  96
  97     // Proceed only when cryptohome is not mounded or running on dev box.
  98     if (!is_mounted || !base::SysInfo::IsRunningOnChromeOS())
  99       ReportCheckResult(KioskAppLaunchError::NONE);
 100     else
 101       ReportCheckResult(KioskAppLaunchError::ALREADY_MOUNTED);
 102   }
 103
 104   void ReportCheckResult(KioskAppLaunchError::Error error) {
 105     if (error == KioskAppLaunchError::NONE)
 106       loader_->LoginAsKioskAccount();
 107     else
 108       loader_->ReportLaunchResult(error);
 109   }
 110
 111   KioskProfileLoader* loader_;
 112   int retry_count_;
 113
 114   DISALLOW_COPY_AND_ASSIGN(CryptohomedChecker);
 115 };
 116
 117
 118 ////////////////////////////////////////////////////////////////////////////////
 119 // KioskProfileLoader
 120
 121 KioskProfileLoader::KioskProfileLoader(const std::string& app_user_id,
 122                                        bool use_guest_mount,
 123                                        Delegate* delegate)
 124     : user_id_(app_user_id),
 125       use_guest_mount_(use_guest_mount),
 126       delegate_(delegate) {}
 127
 128 KioskProfileLoader::~KioskProfileLoader() {}
 129
 130 void KioskProfileLoader::Start() {
 131   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 132   login_performer_.reset();
 133   cryptohomed_checker_.reset(new CryptohomedChecker(this));
 134   cryptohomed_checker_->StartCheck();
 135 }
 136
 137 void KioskProfileLoader::LoginAsKioskAccount() {
 138   login_performer_.reset(new ChromeLoginPerformer(this));
 139   login_performer_->LoginAsKioskAccount(user_id_, use_guest_mount_);
 140 }
 141
 142 void KioskProfileLoader::ReportLaunchResult(KioskAppLaunchError::Error error) {
 143   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 144
 145   if (error != KioskAppLaunchError::NONE) {
 146     delegate_->OnProfileLoadFailed(error);
 147   }
 148 }
 149
 150 void KioskProfileLoader::OnAuthSuccess(const UserContext& user_context) {
 151   // LoginPerformer will delete itself.
 152   login_performer_->set_delegate(NULL);
 153   ignore_result(login_performer_.release());
 154
 155   // If we are launching a demo session, we need to start MountGuest with the
 156   // guest username; this is because there are several places in the cros code
 157   // which rely on the username sent to cryptohome to be $guest. Back in Chrome
 158   // we switch this back to the demo user name to correctly identify this
 159   // user as a demo user.
 160   UserContext context = user_context;
 161   if (context.GetUserID() == chromeos::login::kGuestUserName)
 162     context.SetUserID(DemoAppLauncher::kDemoUserName);
 163   LoginUtils::Get()->PrepareProfile(context,
 164                                     false,  // has_auth_cookies
 165                                     false,  // has_active_session
 166                                     this);
 167 }
 168
 169 void KioskProfileLoader::OnAuthFailure(const AuthFailure& error) {
 170   ReportLaunchResult(LoginFailureToKioskAppLaunchError(error));
 171 }
 172
 173 void KioskProfileLoader::WhiteListCheckFailed(const std::string& email) {
 174   NOTREACHED();
 175 }
 176
 177 void KioskProfileLoader::PolicyLoadFailed() {
 178   ReportLaunchResult(KioskAppLaunchError::POLICY_LOAD_FAILED);
 179 }
 180
 181 void KioskProfileLoader::OnOnlineChecked(
 182     const std::string& email, bool success) {
 183   NOTREACHED();
 184 }
 185
 186 void KioskProfileLoader::OnProfilePrepared(Profile* profile) {
 187   // This object could be deleted any time after successfully reporting
 188   // a profile load, so invalidate the LoginUtils delegate now.
 189   LoginUtils::Get()->DelegateDeleted(this);
 190
 191   delegate_->OnProfileLoaded(profile);
 192   ReportLaunchResult(KioskAppLaunchError::NONE);
 193 }
 194
 195 }  // namespace chromeos