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      1 // Copyright 2014 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 <string>
      6 #include <vector>
      7 
      8 #include "ash/desktop_background/desktop_background_controller.h"
      9 #include "ash/desktop_background/desktop_background_controller_observer.h"
     10 #include "ash/shell.h"
     11 #include "base/basictypes.h"
     12 #include "base/command_line.h"
     13 #include "base/compiler_specific.h"
     14 #include "base/files/file_path.h"
     15 #include "base/files/file_util.h"
     16 #include "base/json/json_writer.h"
     17 #include "base/memory/scoped_ptr.h"
     18 #include "base/path_service.h"
     19 #include "base/run_loop.h"
     20 #include "chrome/browser/chromeos/login/login_manager_test.h"
     21 #include "chrome/browser/chromeos/login/startup_utils.h"
     22 #include "chrome/browser/chromeos/login/ui/login_display_host_impl.h"
     23 #include "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.h"
     24 #include "chrome/browser/chromeos/policy/cloud_external_data_manager_base_test_util.h"
     25 #include "chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.h"
     26 #include "chrome/browser/chromeos/policy/user_cloud_policy_manager_factory_chromeos.h"
     27 #include "chrome/browser/chromeos/profiles/profile_helper.h"
     28 #include "chrome/browser/profiles/profile.h"
     29 #include "chrome/common/chrome_paths.h"
     30 #include "chromeos/chromeos_paths.h"
     31 #include "chromeos/chromeos_switches.h"
     32 #include "chromeos/dbus/cryptohome_client.h"
     33 #include "chromeos/dbus/dbus_thread_manager.h"
     34 #include "chromeos/dbus/fake_session_manager_client.h"
     35 #include "chromeos/dbus/session_manager_client.h"
     36 #include "components/policy/core/common/cloud/cloud_policy_core.h"
     37 #include "components/policy/core/common/cloud/cloud_policy_store.h"
     38 #include "components/policy/core/common/cloud/cloud_policy_validator.h"
     39 #include "components/policy/core/common/cloud/policy_builder.h"
     40 #include "components/user_manager/user.h"
     41 #include "components/user_manager/user_manager.h"
     42 #include "content/public/test/browser_test_utils.h"
     43 #include "crypto/rsa_private_key.h"
     44 #include "net/test/embedded_test_server/embedded_test_server.h"
     45 #include "policy/proto/cloud_policy.pb.h"
     46 #include "testing/gtest/include/gtest/gtest.h"
     47 #include "third_party/skia/include/core/SkBitmap.h"
     48 #include "third_party/skia/include/core/SkColor.h"
     49 #include "ui/gfx/image/image_skia.h"
     50 #include "url/gurl.h"
     51 
     52 namespace chromeos {
     53 
     54 namespace {
     55 
     56 const char kTestUsers[2][19] = { "test-0 (at) example.com", "test-1 (at) example.com" };
     57 
     58 const char kRedImageFileName[] = "chromeos/wallpapers/red.jpg";
     59 const char kGreenImageFileName[] = "chromeos/wallpapers/green.jpg";
     60 const char kBlueImageFileName[] = "chromeos/wallpapers/blue.jpg";
     61 
     62 const SkColor kRedImageColor = SkColorSetARGB(255, 199, 6, 7);
     63 const SkColor kGreenImageColor = SkColorSetARGB(255, 38, 196, 15);
     64 
     65 policy::CloudPolicyStore* GetStoreForUser(const user_manager::User* user) {
     66   Profile* profile = ProfileHelper::Get()->GetProfileByUserUnsafe(user);
     67   if (!profile) {
     68     ADD_FAILURE();
     69     return NULL;
     70   }
     71   policy::UserCloudPolicyManagerChromeOS* policy_manager =
     72       policy::UserCloudPolicyManagerFactoryChromeOS::GetForProfile(profile);
     73   if (!policy_manager) {
     74     ADD_FAILURE();
     75     return NULL;
     76   }
     77   return policy_manager->core()->store();
     78 }
     79 
     80 // Compute the average ARGB color of |bitmap|.
     81 SkColor ComputeAverageColor(const SkBitmap& bitmap) {
     82   if (bitmap.empty() || bitmap.width() < 1 || bitmap.height() < 1) {
     83     ADD_FAILURE() << "Empty or invalid bitmap.";
     84     return SkColorSetARGB(0, 0, 0, 0);
     85   }
     86   if (bitmap.isNull()) {
     87     ADD_FAILURE() << "Bitmap has no pixelref.";
     88     return SkColorSetARGB(0, 0, 0, 0);
     89   }
     90   if (bitmap.colorType() == kUnknown_SkColorType) {
     91     ADD_FAILURE() << "Bitmap has not been configured.";
     92     return SkColorSetARGB(0, 0, 0, 0);
     93   }
     94   uint64 a = 0, r = 0, g = 0, b = 0;
     95   bitmap.lockPixels();
     96   for (int x = 0; x < bitmap.width(); ++x) {
     97     for (int y = 0; y < bitmap.height(); ++y) {
     98       const SkColor color = bitmap.getColor(x, y);
     99       a += SkColorGetA(color);
    100       r += SkColorGetR(color);
    101       g += SkColorGetG(color);
    102       b += SkColorGetB(color);
    103     }
    104   }
    105   bitmap.unlockPixels();
    106   uint64 pixel_number = bitmap.width() * bitmap.height();
    107   return SkColorSetARGB((a + pixel_number / 2) / pixel_number,
    108                         (r + pixel_number / 2) / pixel_number,
    109                         (g + pixel_number / 2) / pixel_number,
    110                         (b + pixel_number / 2) / pixel_number);
    111 }
    112 
    113 // Obtain background image and return its average ARGB color.
    114 SkColor GetAverageBackgroundColor() {
    115   const gfx::ImageSkia image =
    116       ash::Shell::GetInstance()->desktop_background_controller()->
    117       GetWallpaper();
    118 
    119   const gfx::ImageSkiaRep& representation = image.GetRepresentation(1.);
    120   if (representation.is_null()) {
    121     ADD_FAILURE() << "No image representation.";
    122     return SkColorSetARGB(0, 0, 0, 0);
    123   }
    124 
    125   const SkBitmap& bitmap = representation.sk_bitmap();
    126   return ComputeAverageColor(bitmap);
    127 }
    128 
    129 }  // namespace
    130 
    131 class WallpaperManagerPolicyTest
    132     : public LoginManagerTest,
    133       public ash::DesktopBackgroundControllerObserver {
    134  protected:
    135   WallpaperManagerPolicyTest()
    136       : LoginManagerTest(true),
    137         wallpaper_change_count_(0),
    138         fake_session_manager_client_(new FakeSessionManagerClient) {
    139   }
    140 
    141   scoped_ptr<policy::UserPolicyBuilder> GetUserPolicyBuilder(
    142       const std::string& user_id) {
    143     scoped_ptr<policy::UserPolicyBuilder>
    144         user_policy_builder(new policy::UserPolicyBuilder());
    145     base::FilePath user_keys_dir;
    146     EXPECT_TRUE(PathService::Get(DIR_USER_POLICY_KEYS, &user_keys_dir));
    147     const std::string sanitized_user_id =
    148         CryptohomeClient::GetStubSanitizedUsername(user_id);
    149     const base::FilePath user_key_file =
    150         user_keys_dir.AppendASCII(sanitized_user_id)
    151                      .AppendASCII("policy.pub");
    152     std::vector<uint8> user_key_bits;
    153     EXPECT_TRUE(user_policy_builder->GetSigningKey()->
    154                 ExportPublicKey(&user_key_bits));
    155     EXPECT_TRUE(base::CreateDirectory(user_key_file.DirName()));
    156     EXPECT_EQ(base::WriteFile(
    157                   user_key_file,
    158                   reinterpret_cast<const char*>(user_key_bits.data()),
    159                   user_key_bits.size()),
    160               static_cast<int>(user_key_bits.size()));
    161     user_policy_builder->policy_data().set_username(user_id);
    162     return user_policy_builder.Pass();
    163   }
    164 
    165   // LoginManagerTest:
    166   virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
    167     DBusThreadManager::GetSetterForTesting()->SetSessionManagerClient(
    168         scoped_ptr<SessionManagerClient>(fake_session_manager_client_));
    169 
    170     LoginManagerTest::SetUpInProcessBrowserTestFixture();
    171     ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &test_data_dir_));
    172   }
    173 
    174   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
    175     // Set the same switches as LoginManagerTest, except that kMultiProfiles is
    176     // only set when GetParam() is true and except that kLoginProfile is set
    177     // when GetParam() is false.  The latter seems to be required for the sane
    178     // start-up of user profiles.
    179     command_line->AppendSwitch(switches::kLoginManager);
    180     command_line->AppendSwitch(switches::kForceLoginManagerInTests);
    181   }
    182 
    183   virtual void SetUpOnMainThread() OVERRIDE {
    184     LoginManagerTest::SetUpOnMainThread();
    185     ash::Shell::GetInstance()->
    186         desktop_background_controller()->AddObserver(this);
    187 
    188     // Set up policy signing.
    189     user_policy_builders_[0] = GetUserPolicyBuilder(kTestUsers[0]);
    190     user_policy_builders_[1] = GetUserPolicyBuilder(kTestUsers[1]);
    191 
    192     ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
    193   }
    194 
    195   virtual void TearDownOnMainThread() OVERRIDE {
    196     ash::Shell::GetInstance()->
    197         desktop_background_controller()->RemoveObserver(this);
    198     LoginManagerTest::TearDownOnMainThread();
    199   }
    200 
    201   // ash::DesktopBackgroundControllerObserver:
    202   virtual void OnWallpaperDataChanged() OVERRIDE {
    203     ++wallpaper_change_count_;
    204     if (run_loop_)
    205       run_loop_->Quit();
    206   }
    207 
    208   // Runs the loop until wallpaper has changed at least |count| times in total.
    209   void RunUntilWallpaperChangeCount(int count) {
    210     while (wallpaper_change_count_ < count) {
    211       run_loop_.reset(new base::RunLoop);
    212       run_loop_->Run();
    213     }
    214   }
    215 
    216   std::string ConstructPolicy(const std::string& relative_path) const {
    217     std::string image_data;
    218     if (!base::ReadFileToString(test_data_dir_.Append(relative_path),
    219                                 &image_data)) {
    220       ADD_FAILURE();
    221     }
    222     std::string policy;
    223     base::JSONWriter::Write(policy::test::ConstructExternalDataReference(
    224         embedded_test_server()->GetURL(std::string("/") + relative_path).spec(),
    225         image_data).get(),
    226         &policy);
    227     return policy;
    228   }
    229 
    230   // Inject |filename| as wallpaper policy for test user |user_number|.  Set
    231   // empty |filename| to clear policy.
    232   void InjectPolicy(int user_number, const std::string& filename) {
    233     ASSERT_TRUE(user_number == 0 || user_number == 1);
    234     const std::string user_id = kTestUsers[user_number];
    235     policy::UserPolicyBuilder* builder =
    236         user_policy_builders_[user_number].get();
    237     if (filename != "") {
    238       builder->payload().
    239           mutable_wallpaperimage()->set_value(ConstructPolicy(filename));
    240     } else {
    241       builder->payload().Clear();
    242     }
    243     builder->Build();
    244     fake_session_manager_client_->set_user_policy(user_id, builder->GetBlob());
    245     const user_manager::User* user =
    246         user_manager::UserManager::Get()->FindUser(user_id);
    247     ASSERT_TRUE(user);
    248     policy::CloudPolicyStore* store = GetStoreForUser(user);
    249     ASSERT_TRUE(store);
    250     store->Load();
    251     ASSERT_EQ(policy::CloudPolicyStore::STATUS_OK, store->status());
    252     ASSERT_EQ(policy::CloudPolicyValidatorBase::VALIDATION_OK,
    253               store->validation_status());
    254   }
    255 
    256   // Obtain WallpaperInfo for |user_number| from WallpaperManager.
    257   void GetUserWallpaperInfo(int user_number, WallpaperInfo* wallpaper_info) {
    258     WallpaperManager::Get()->
    259         GetUserWallpaperInfo(kTestUsers[user_number], wallpaper_info);
    260   }
    261 
    262   base::FilePath test_data_dir_;
    263   scoped_ptr<base::RunLoop> run_loop_;
    264   int wallpaper_change_count_;
    265   scoped_ptr<policy::UserPolicyBuilder> user_policy_builders_[2];
    266   FakeSessionManagerClient* fake_session_manager_client_;
    267 
    268  private:
    269   DISALLOW_COPY_AND_ASSIGN(WallpaperManagerPolicyTest);
    270 };
    271 
    272 IN_PROC_BROWSER_TEST_F(WallpaperManagerPolicyTest, PRE_SetResetClear) {
    273   RegisterUser(kTestUsers[0]);
    274   RegisterUser(kTestUsers[1]);
    275   StartupUtils::MarkOobeCompleted();
    276 }
    277 
    278 // Verifies that the wallpaper can be set and re-set through policy and that
    279 // setting policy for a user that is not logged in doesn't affect the current
    280 // user.  Also verifies that after the policy has been cleared, the wallpaper
    281 // reverts to default.
    282 IN_PROC_BROWSER_TEST_F(WallpaperManagerPolicyTest, SetResetClear) {
    283   WallpaperInfo info;
    284   LoginUser(kTestUsers[0]);
    285   base::RunLoop().RunUntilIdle();
    286 
    287   // First user: Wait until default wallpaper has been loaded (happens
    288   // automatically) and store color to recognize it later.
    289   RunUntilWallpaperChangeCount(1);
    290   const SkColor original_background_color = GetAverageBackgroundColor();
    291 
    292   // Second user: Set wallpaper policy to blue image.  This should not result in
    293   // a wallpaper change, which is checked at the very end of this test.
    294   InjectPolicy(1, kBlueImageFileName);
    295 
    296   // First user: Set wallpaper policy to red image and verify average color.
    297   InjectPolicy(0, kRedImageFileName);
    298   RunUntilWallpaperChangeCount(2);
    299   GetUserWallpaperInfo(0, &info);
    300   ASSERT_EQ(user_manager::User::POLICY, info.type);
    301   ASSERT_EQ(kRedImageColor, GetAverageBackgroundColor());
    302 
    303   // First user: Set wallpaper policy to green image and verify average color.
    304   InjectPolicy(0, kGreenImageFileName);
    305   RunUntilWallpaperChangeCount(3);
    306   GetUserWallpaperInfo(0, &info);
    307   ASSERT_EQ(user_manager::User::POLICY, info.type);
    308   ASSERT_EQ(kGreenImageColor, GetAverageBackgroundColor());
    309 
    310   // First user: Clear wallpaper policy and verify that the default wallpaper is
    311   // set again.
    312   InjectPolicy(0, "");
    313   RunUntilWallpaperChangeCount(4);
    314   GetUserWallpaperInfo(0, &info);
    315   ASSERT_EQ(user_manager::User::DEFAULT, info.type);
    316   ASSERT_EQ(original_background_color, GetAverageBackgroundColor());
    317 
    318   // Check wallpaper change count to ensure that setting the second user's
    319   // wallpaper didn't have any effect.
    320   ASSERT_EQ(4, wallpaper_change_count_);
    321 }
    322 
    323 IN_PROC_BROWSER_TEST_F(WallpaperManagerPolicyTest,
    324                        DISABLED_PRE_PRE_PRE_WallpaperOnLoginScreen) {
    325   RegisterUser(kTestUsers[0]);
    326   RegisterUser(kTestUsers[1]);
    327   StartupUtils::MarkOobeCompleted();
    328 }
    329 
    330 IN_PROC_BROWSER_TEST_F(WallpaperManagerPolicyTest,
    331                        DISABLED_PRE_PRE_WallpaperOnLoginScreen) {
    332   LoginUser(kTestUsers[0]);
    333 
    334   // Wait until default wallpaper has been loaded.
    335   RunUntilWallpaperChangeCount(1);
    336 
    337   // Set wallpaper policy to red image.
    338   InjectPolicy(0, kRedImageFileName);
    339 
    340   // Run until wallpaper has changed.
    341   RunUntilWallpaperChangeCount(2);
    342   ASSERT_EQ(kRedImageColor, GetAverageBackgroundColor());
    343 }
    344 
    345 IN_PROC_BROWSER_TEST_F(WallpaperManagerPolicyTest,
    346                        DISABLED_PRE_WallpaperOnLoginScreen) {
    347   LoginUser(kTestUsers[1]);
    348 
    349   // Wait until default wallpaper has been loaded.
    350   RunUntilWallpaperChangeCount(1);
    351 
    352   // Set wallpaper policy to green image.
    353   InjectPolicy(1, kGreenImageFileName);
    354 
    355   // Run until wallpaper has changed.
    356   RunUntilWallpaperChangeCount(2);
    357   ASSERT_EQ(kGreenImageColor, GetAverageBackgroundColor());
    358 }
    359 
    360 // Disabled due to flakiness: http://crbug.com/385648.
    361 IN_PROC_BROWSER_TEST_F(WallpaperManagerPolicyTest,
    362                        DISABLED_WallpaperOnLoginScreen) {
    363   // Wait for active pod's wallpaper to be loaded.
    364   RunUntilWallpaperChangeCount(1);
    365   ASSERT_EQ(kGreenImageColor, GetAverageBackgroundColor());
    366 
    367   // Select the second pod (belonging to user 1).
    368   ASSERT_TRUE(content::ExecuteScript(
    369       static_cast<chromeos::LoginDisplayHostImpl*>(
    370           chromeos::LoginDisplayHostImpl::default_host())->GetOobeUI()->
    371               web_ui()->GetWebContents(),
    372       "document.getElementsByClassName('pod')[1].focus();"));
    373   RunUntilWallpaperChangeCount(2);
    374   ASSERT_EQ(kRedImageColor, GetAverageBackgroundColor());
    375 }
    376 
    377 IN_PROC_BROWSER_TEST_F(WallpaperManagerPolicyTest, PRE_PRE_PersistOverLogout) {
    378   RegisterUser(kTestUsers[0]);
    379   StartupUtils::MarkOobeCompleted();
    380 }
    381 
    382 IN_PROC_BROWSER_TEST_F(WallpaperManagerPolicyTest, PRE_PersistOverLogout) {
    383   LoginUser(kTestUsers[0]);
    384 
    385   // Wait until default wallpaper has been loaded.
    386   RunUntilWallpaperChangeCount(1);
    387 
    388   // Set wallpaper policy to red image.
    389   InjectPolicy(0, kRedImageFileName);
    390 
    391   // Run until wallpaper has changed.
    392   RunUntilWallpaperChangeCount(2);
    393   ASSERT_EQ(kRedImageColor, GetAverageBackgroundColor());
    394 }
    395 
    396 IN_PROC_BROWSER_TEST_F(WallpaperManagerPolicyTest, PersistOverLogout) {
    397   LoginUser(kTestUsers[0]);
    398 
    399   // Wait until wallpaper has been loaded.
    400   RunUntilWallpaperChangeCount(1);
    401   ASSERT_EQ(kRedImageColor, GetAverageBackgroundColor());
    402 }
    403 
    404 }  // namespace chromeos
    405