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      1 // Copyright (c) 2012 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 "base/callback.h"
      6 #include "base/command_line.h"
      7 #include "base/file_util.h"
      8 #include "base/files/file_path.h"
      9 #include "base/files/scoped_temp_dir.h"
     10 #include "base/memory/scoped_ptr.h"
     11 #include "base/path_service.h"
     12 #include "base/prefs/pref_service.h"
     13 #include "base/run_loop.h"
     14 #include "base/strings/stringprintf.h"
     15 #include "base/time/time.h"
     16 #include "chrome/browser/browser_process.h"
     17 #include "chrome/browser/chrome_notification_types.h"
     18 #include "chrome/browser/invalidation/fake_invalidation_service.h"
     19 #include "chrome/browser/invalidation/profile_invalidation_provider_factory.h"
     20 #include "chrome/browser/policy/profile_policy_connector.h"
     21 #include "chrome/browser/policy/profile_policy_connector_factory.h"
     22 #include "chrome/browser/policy/test/local_policy_test_server.h"
     23 #include "chrome/browser/profiles/profile.h"
     24 #include "chrome/browser/ui/browser.h"
     25 #include "chrome/test/base/in_process_browser_test.h"
     26 #include "components/invalidation/invalidation_service.h"
     27 #include "components/invalidation/profile_invalidation_provider.h"
     28 #include "components/keyed_service/core/keyed_service.h"
     29 #include "components/policy/core/browser/browser_policy_connector.h"
     30 #include "components/policy/core/common/cloud/cloud_policy_client.h"
     31 #include "components/policy/core/common/cloud/cloud_policy_constants.h"
     32 #include "components/policy/core/common/cloud/mock_cloud_policy_client.h"
     33 #include "components/policy/core/common/external_data_fetcher.h"
     34 #include "components/policy/core/common/policy_map.h"
     35 #include "components/policy/core/common/policy_service.h"
     36 #include "components/policy/core/common/policy_switches.h"
     37 #include "components/policy/core/common/policy_test_utils.h"
     38 #include "content/public/browser/notification_service.h"
     39 #include "content/public/browser/notification_source.h"
     40 #include "content/public/test/test_utils.h"
     41 #include "net/url_request/url_request_context_getter.h"
     42 #include "policy/policy_constants.h"
     43 #include "policy/proto/chrome_settings.pb.h"
     44 #include "policy/proto/cloud_policy.pb.h"
     45 #include "sync/internal_api/public/base/invalidation.h"
     46 #include "testing/gmock/include/gmock/gmock.h"
     47 #include "testing/gtest/include/gtest/gtest.h"
     48 #include "url/gurl.h"
     49 
     50 #if defined(OS_CHROMEOS)
     51 #include "chrome/browser/chromeos/login/users/user_manager.h"
     52 #include "chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.h"
     53 #include "chrome/browser/chromeos/policy/user_cloud_policy_manager_factory_chromeos.h"
     54 #include "chromeos/chromeos_paths.h"
     55 #include "chromeos/dbus/cryptohome_client.h"
     56 #else
     57 #include "chrome/browser/policy/cloud/user_cloud_policy_manager_factory.h"
     58 #include "chrome/browser/signin/signin_manager_factory.h"
     59 #include "components/policy/core/common/cloud/user_cloud_policy_manager.h"
     60 #include "components/signin/core/browser/signin_manager.h"
     61 #endif
     62 
     63 using testing::AnyNumber;
     64 using testing::InvokeWithoutArgs;
     65 using testing::Mock;
     66 using testing::Return;
     67 using testing::_;
     68 
     69 namespace content {
     70 class BrowserContext;
     71 }
     72 
     73 namespace em = enterprise_management;
     74 
     75 namespace policy {
     76 
     77 namespace {
     78 
     79 KeyedService* BuildFakeProfileInvalidationProvider(
     80     content::BrowserContext* context) {
     81   return new invalidation::ProfileInvalidationProvider(
     82       scoped_ptr<invalidation::InvalidationService>(
     83           new invalidation::FakeInvalidationService));
     84 }
     85 
     86 const char* GetTestUser() {
     87 #if defined(OS_CHROMEOS)
     88   return chromeos::UserManager::kStubUser;
     89 #else
     90   return "user (at) example.com";
     91 #endif
     92 }
     93 
     94 std::string GetEmptyPolicy() {
     95   const char kEmptyPolicy[] =
     96       "{"
     97       "  \"%s\": {"
     98       "    \"mandatory\": {},"
     99       "    \"recommended\": {}"
    100       "  },"
    101       "  \"managed_users\": [ \"*\" ],"
    102       "  \"policy_user\": \"%s\","
    103       "  \"current_key_index\": 0"
    104       "}";
    105 
    106   return base::StringPrintf(
    107       kEmptyPolicy, dm_protocol::kChromeUserPolicyType, GetTestUser());
    108 }
    109 
    110 std::string GetTestPolicy(const char* homepage, int key_version) {
    111   const char kTestPolicy[] =
    112       "{"
    113       "  \"%s\": {"
    114       "    \"mandatory\": {"
    115       "      \"ShowHomeButton\": true,"
    116       "      \"RestoreOnStartup\": 4,"
    117       "      \"URLBlacklist\": [ \"dev.chromium.org\", \"youtube.com\" ],"
    118       "      \"MaxInvalidationFetchDelay\": 1000"
    119       "    },"
    120       "    \"recommended\": {"
    121       "      \"HomepageLocation\": \"%s\""
    122       "    }"
    123       "  },"
    124       "  \"managed_users\": [ \"*\" ],"
    125       "  \"policy_user\": \"%s\","
    126       "  \"current_key_index\": %d,"
    127       "  \"invalidation_source\": 16,"
    128       "  \"invalidation_name\": \"test_policy\""
    129       "}";
    130 
    131   return base::StringPrintf(kTestPolicy,
    132                             dm_protocol::kChromeUserPolicyType,
    133                             homepage,
    134                             GetTestUser(),
    135                             key_version);
    136 }
    137 
    138 void GetExpectedDefaultPolicy(PolicyMap* policy_map) {
    139 #if defined(OS_CHROMEOS)
    140   policy_map->Set(
    141       key::kChromeOsMultiProfileUserBehavior, POLICY_LEVEL_MANDATORY,
    142       POLICY_SCOPE_USER, base::Value::CreateStringValue("not-allowed"), NULL);
    143 #endif
    144 }
    145 
    146 void GetExpectedTestPolicy(PolicyMap* expected, const char* homepage) {
    147   expected->Set(key::kShowHomeButton, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
    148                 base::Value::CreateBooleanValue(true), NULL);
    149   expected->Set(key::kRestoreOnStartup, POLICY_LEVEL_MANDATORY,
    150                 POLICY_SCOPE_USER, base::Value::CreateIntegerValue(4), NULL);
    151   base::ListValue list;
    152   list.AppendString("dev.chromium.org");
    153   list.AppendString("youtube.com");
    154   expected->Set(
    155       key::kURLBlacklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
    156       list.DeepCopy(), NULL);
    157   expected->Set(
    158       key::kMaxInvalidationFetchDelay, POLICY_LEVEL_MANDATORY,
    159       POLICY_SCOPE_USER, base::Value::CreateIntegerValue(1000), NULL);
    160   expected->Set(
    161       key::kHomepageLocation, POLICY_LEVEL_RECOMMENDED,
    162       POLICY_SCOPE_USER, base::Value::CreateStringValue(homepage), NULL);
    163 #if defined(OS_CHROMEOS)
    164   expected->Set(
    165       key::kChromeOsMultiProfileUserBehavior, POLICY_LEVEL_MANDATORY,
    166       POLICY_SCOPE_USER, base::Value::CreateStringValue("not-allowed"), NULL);
    167 #endif
    168 }
    169 
    170 }  // namespace
    171 
    172 // Tests the cloud policy stack(s).
    173 class CloudPolicyTest : public InProcessBrowserTest,
    174                         public PolicyService::Observer {
    175  protected:
    176   CloudPolicyTest() {}
    177   virtual ~CloudPolicyTest() {}
    178 
    179   virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
    180     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
    181     ASSERT_NO_FATAL_FAILURE(SetServerPolicy(GetEmptyPolicy()));
    182 
    183     test_server_.reset(new LocalPolicyTestServer(policy_file_path()));
    184     ASSERT_TRUE(test_server_->Start());
    185 
    186     std::string url = test_server_->GetServiceURL().spec();
    187 
    188     CommandLine* command_line = CommandLine::ForCurrentProcess();
    189     command_line->AppendSwitchASCII(switches::kDeviceManagementUrl, url);
    190 
    191     invalidation::ProfileInvalidationProviderFactory::GetInstance()->
    192         RegisterTestingFactory(BuildFakeProfileInvalidationProvider);
    193   }
    194 
    195   virtual void SetUpOnMainThread() OVERRIDE {
    196     ASSERT_TRUE(PolicyServiceIsEmpty(g_browser_process->policy_service()))
    197         << "Pre-existing policies in this machine will make this test fail.";
    198 
    199     BrowserPolicyConnector* connector =
    200         g_browser_process->browser_policy_connector();
    201     connector->ScheduleServiceInitialization(0);
    202 
    203 #if defined(OS_CHROMEOS)
    204     UserCloudPolicyManagerChromeOS* policy_manager =
    205         UserCloudPolicyManagerFactoryChromeOS::GetForProfile(
    206             browser()->profile());
    207     ASSERT_TRUE(policy_manager);
    208 #else
    209     // Mock a signed-in user. This is used by the UserCloudPolicyStore to pass
    210     // the username to the UserCloudPolicyValidator.
    211     SigninManager* signin_manager =
    212         SigninManagerFactory::GetForProfile(browser()->profile());
    213     ASSERT_TRUE(signin_manager);
    214     signin_manager->SetAuthenticatedUsername(GetTestUser());
    215 
    216     UserCloudPolicyManager* policy_manager =
    217         UserCloudPolicyManagerFactory::GetForBrowserContext(
    218             browser()->profile());
    219     ASSERT_TRUE(policy_manager);
    220     policy_manager->Connect(
    221         g_browser_process->local_state(),
    222         g_browser_process->system_request_context(),
    223         UserCloudPolicyManager::CreateCloudPolicyClient(
    224             connector->device_management_service(),
    225             g_browser_process->system_request_context()).Pass());
    226 #endif  // defined(OS_CHROMEOS)
    227 
    228     ASSERT_TRUE(policy_manager->core()->client());
    229     base::RunLoop run_loop;
    230     MockCloudPolicyClientObserver observer;
    231     EXPECT_CALL(observer, OnRegistrationStateChanged(_)).WillOnce(
    232         InvokeWithoutArgs(&run_loop, &base::RunLoop::Quit));
    233     policy_manager->core()->client()->AddObserver(&observer);
    234 
    235     // Give a bogus OAuth token to the |policy_manager|. This should make its
    236     // CloudPolicyClient fetch the DMToken.
    237     ASSERT_FALSE(policy_manager->core()->client()->is_registered());
    238     em::DeviceRegisterRequest::Type registration_type =
    239 #if defined(OS_CHROMEOS)
    240         em::DeviceRegisterRequest::USER;
    241 #else
    242         em::DeviceRegisterRequest::BROWSER;
    243 #endif
    244     policy_manager->core()->client()->Register(
    245         registration_type, "bogus", std::string(), false, std::string(),
    246         std::string());
    247     run_loop.Run();
    248     Mock::VerifyAndClearExpectations(&observer);
    249     policy_manager->core()->client()->RemoveObserver(&observer);
    250     EXPECT_TRUE(policy_manager->core()->client()->is_registered());
    251 
    252 #if defined(OS_CHROMEOS)
    253     // Get the path to the user policy key file.
    254     base::FilePath user_policy_key_dir;
    255     ASSERT_TRUE(
    256         PathService::Get(chromeos::DIR_USER_POLICY_KEYS, &user_policy_key_dir));
    257     std::string sanitized_username =
    258         chromeos::CryptohomeClient::GetStubSanitizedUsername(GetTestUser());
    259     user_policy_key_file_ = user_policy_key_dir.AppendASCII(sanitized_username)
    260                                                .AppendASCII("policy.pub");
    261 #endif
    262   }
    263 
    264   PolicyService* GetPolicyService() {
    265     ProfilePolicyConnector* profile_connector =
    266         ProfilePolicyConnectorFactory::GetForProfile(browser()->profile());
    267     return profile_connector->policy_service();
    268   }
    269 
    270   invalidation::FakeInvalidationService* GetInvalidationService() {
    271     return static_cast<invalidation::FakeInvalidationService*>(
    272         static_cast<invalidation::ProfileInvalidationProvider*>(
    273             invalidation::ProfileInvalidationProviderFactory::GetInstance()->
    274                 GetForProfile(browser()->profile()))->GetInvalidationService());
    275   }
    276 
    277   void SetServerPolicy(const std::string& policy) {
    278     int result = base::WriteFile(policy_file_path(), policy.data(),
    279                                  policy.size());
    280     ASSERT_EQ(static_cast<int>(policy.size()), result);
    281   }
    282 
    283   base::FilePath policy_file_path() const {
    284     return temp_dir_.path().AppendASCII("policy.json");
    285   }
    286 
    287   virtual void OnPolicyUpdated(const PolicyNamespace& ns,
    288                                const PolicyMap& previous,
    289                                const PolicyMap& current) OVERRIDE {
    290     if (!on_policy_updated_.is_null()) {
    291       on_policy_updated_.Run();
    292       on_policy_updated_.Reset();
    293     }
    294   }
    295 
    296   virtual void OnPolicyServiceInitialized(PolicyDomain domain) OVERRIDE {}
    297 
    298   base::ScopedTempDir temp_dir_;
    299   scoped_ptr<LocalPolicyTestServer> test_server_;
    300   base::FilePath user_policy_key_file_;
    301   base::Closure on_policy_updated_;
    302 };
    303 
    304 IN_PROC_BROWSER_TEST_F(CloudPolicyTest, FetchPolicy) {
    305   PolicyService* policy_service = GetPolicyService();
    306   {
    307     base::RunLoop run_loop;
    308     // This does the initial fetch and stores the initial key.
    309     policy_service->RefreshPolicies(run_loop.QuitClosure());
    310     run_loop.Run();
    311   }
    312 
    313   PolicyMap default_policy;
    314   GetExpectedDefaultPolicy(&default_policy);
    315   EXPECT_TRUE(default_policy.Equals(policy_service->GetPolicies(
    316       PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()))));
    317 
    318   ASSERT_NO_FATAL_FAILURE(SetServerPolicy(GetTestPolicy("google.com", 0)));
    319   PolicyMap expected;
    320   GetExpectedTestPolicy(&expected, "google.com");
    321   {
    322     base::RunLoop run_loop;
    323     // This fetches the new policies, using the same key.
    324     policy_service->RefreshPolicies(run_loop.QuitClosure());
    325     run_loop.Run();
    326   }
    327   EXPECT_TRUE(expected.Equals(policy_service->GetPolicies(
    328       PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()))));
    329 }
    330 
    331 IN_PROC_BROWSER_TEST_F(CloudPolicyTest, InvalidatePolicy) {
    332   PolicyService* policy_service = GetPolicyService();
    333   policy_service->AddObserver(POLICY_DOMAIN_CHROME, this);
    334 
    335   // Perform the initial fetch.
    336   ASSERT_NO_FATAL_FAILURE(SetServerPolicy(GetTestPolicy("google.com", 0)));
    337   {
    338     base::RunLoop run_loop;
    339     policy_service->RefreshPolicies(run_loop.QuitClosure());
    340     run_loop.Run();
    341   }
    342 
    343   // Update the homepage in the policy and trigger an invalidation.
    344   ASSERT_NO_FATAL_FAILURE(SetServerPolicy(GetTestPolicy("youtube.com", 0)));
    345   base::TimeDelta now =
    346       base::Time::NowFromSystemTime() - base::Time::UnixEpoch();
    347   GetInvalidationService()->EmitInvalidationForTest(
    348       syncer::Invalidation::Init(
    349           invalidation::ObjectId(16, "test_policy"),
    350           now.InMicroseconds() /* version */,
    351           "payload"));
    352   {
    353     base::RunLoop run_loop;
    354     on_policy_updated_ = run_loop.QuitClosure();
    355     run_loop.Run();
    356   }
    357 
    358   // Check that the updated policy was fetched.
    359   PolicyMap expected;
    360   GetExpectedTestPolicy(&expected, "youtube.com");
    361   EXPECT_TRUE(expected.Equals(policy_service->GetPolicies(
    362       PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()))));
    363 
    364   policy_service->RemoveObserver(POLICY_DOMAIN_CHROME, this);
    365 }
    366 
    367 #if defined(OS_CHROMEOS)
    368 IN_PROC_BROWSER_TEST_F(CloudPolicyTest, FetchPolicyWithRotatedKey) {
    369   PolicyService* policy_service = GetPolicyService();
    370   {
    371     base::RunLoop run_loop;
    372     // This does the initial fetch and stores the initial key.
    373     policy_service->RefreshPolicies(run_loop.QuitClosure());
    374     run_loop.Run();
    375   }
    376 
    377   // Read the initial key.
    378   std::string initial_key;
    379   ASSERT_TRUE(base::ReadFileToString(user_policy_key_file_, &initial_key));
    380 
    381   PolicyMap default_policy;
    382   GetExpectedDefaultPolicy(&default_policy);
    383   EXPECT_TRUE(default_policy.Equals(policy_service->GetPolicies(
    384       PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()))));
    385 
    386   // Set the new policies and a new key at the server.
    387   ASSERT_NO_FATAL_FAILURE(SetServerPolicy(GetTestPolicy("google.com", 1)));
    388   PolicyMap expected;
    389   GetExpectedTestPolicy(&expected, "google.com");
    390   {
    391     base::RunLoop run_loop;
    392     // This fetches the new policies and does a key rotation.
    393     policy_service->RefreshPolicies(run_loop.QuitClosure());
    394     run_loop.Run();
    395   }
    396   EXPECT_TRUE(expected.Equals(policy_service->GetPolicies(
    397       PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()))));
    398 
    399   // Verify that the key was rotated.
    400   std::string rotated_key;
    401   ASSERT_TRUE(base::ReadFileToString(user_policy_key_file_, &rotated_key));
    402   EXPECT_NE(rotated_key, initial_key);
    403 
    404   // Another refresh using the same key won't rotate it again.
    405   {
    406     base::RunLoop run_loop;
    407     policy_service->RefreshPolicies(run_loop.QuitClosure());
    408     run_loop.Run();
    409   }
    410   EXPECT_TRUE(expected.Equals(policy_service->GetPolicies(
    411       PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()))));
    412   std::string current_key;
    413   ASSERT_TRUE(base::ReadFileToString(user_policy_key_file_, &current_key));
    414   EXPECT_EQ(rotated_key, current_key);
    415 }
    416 #endif
    417 
    418 TEST(CloudPolicyProtoTest, VerifyProtobufEquivalence) {
    419   // There are 2 protobufs that can be used for user cloud policy:
    420   // cloud_policy.proto and chrome_settings.proto. chrome_settings.proto is the
    421   // version used by the server, but generates one proto message per policy; to
    422   // save binary size on the client, the other version shares proto messages for
    423   // policies of the same type. They generate the same bytes on the wire though,
    424   // so they are compatible. This test verifies that that stays true.
    425 
    426   // Build a ChromeSettingsProto message with one policy of each supported type.
    427   em::ChromeSettingsProto chrome_settings;
    428   chrome_settings.mutable_homepagelocation()->set_homepagelocation(
    429       "chromium.org");
    430   chrome_settings.mutable_showhomebutton()->set_showhomebutton(true);
    431   chrome_settings.mutable_restoreonstartup()->set_restoreonstartup(4);
    432   em::StringList* list =
    433       chrome_settings.mutable_disabledschemes()->mutable_disabledschemes();
    434   list->add_entries("ftp");
    435   list->add_entries("mailto");
    436   // Try explicitly setting a policy mode too.
    437   chrome_settings.mutable_disablespdy()->set_disablespdy(false);
    438   chrome_settings.mutable_disablespdy()->mutable_policy_options()->set_mode(
    439       em::PolicyOptions::MANDATORY);
    440   chrome_settings.mutable_syncdisabled()->set_syncdisabled(true);
    441   chrome_settings.mutable_syncdisabled()->mutable_policy_options()->set_mode(
    442       em::PolicyOptions::RECOMMENDED);
    443 
    444   // Build an equivalent CloudPolicySettings message.
    445   em::CloudPolicySettings cloud_policy;
    446   cloud_policy.mutable_homepagelocation()->set_value("chromium.org");
    447   cloud_policy.mutable_showhomebutton()->set_value(true);
    448   cloud_policy.mutable_restoreonstartup()->set_value(4);
    449   list = cloud_policy.mutable_disabledschemes()->mutable_value();
    450   list->add_entries("ftp");
    451   list->add_entries("mailto");
    452   cloud_policy.mutable_disablespdy()->set_value(false);
    453   cloud_policy.mutable_disablespdy()->mutable_policy_options()->set_mode(
    454       em::PolicyOptions::MANDATORY);
    455   cloud_policy.mutable_syncdisabled()->set_value(true);
    456   cloud_policy.mutable_syncdisabled()->mutable_policy_options()->set_mode(
    457       em::PolicyOptions::RECOMMENDED);
    458 
    459   // They should now serialize to the same bytes.
    460   std::string chrome_settings_serialized;
    461   std::string cloud_policy_serialized;
    462   ASSERT_TRUE(chrome_settings.SerializeToString(&chrome_settings_serialized));
    463   ASSERT_TRUE(cloud_policy.SerializeToString(&cloud_policy_serialized));
    464   EXPECT_EQ(chrome_settings_serialized, cloud_policy_serialized);
    465 }
    466 
    467 }  // namespace policy
    468