chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.cc

   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 "chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/logging.h"
  10 #include "base/metrics/histogram.h"
  11 #include "base/metrics/sparse_histogram.h"
  12 #include "base/sequenced_task_runner.h"
  13 #include "base/values.h"
  14 #include "chrome/browser/browser_process.h"
  15 #include "chrome/browser/chromeos/policy/policy_oauth2_token_fetcher.h"
  16 #include "chrome/browser/chromeos/policy/user_cloud_policy_manager_factory_chromeos.h"
  17 #include "chrome/browser/chromeos/policy/wildcard_login_checker.h"
  18 #include "chrome/browser/chromeos/profiles/profile_helper.h"
  19 #include "chrome/browser/lifetime/application_lifetime.h"
  20 #include "chrome/common/chrome_content_client.h"
  21 #include "components/policy/core/common/cloud/cloud_external_data_manager.h"
  22 #include "components/policy/core/common/cloud/cloud_policy_refresh_scheduler.h"
  23 #include "components/policy/core/common/cloud/device_management_service.h"
  24 #include "components/policy/core/common/cloud/system_policy_request_context.h"
  25 #include "components/policy/core/common/policy_map.h"
  26 #include "components/policy/core/common/policy_pref_names.h"
  27 #include "components/policy/core/common/policy_types.h"
  28 #include "components/user_manager/user_manager.h"
  29 #include "net/url_request/url_request_context_getter.h"
  30 #include "policy/policy_constants.h"
  31 #include "url/gurl.h"
  32
  33 namespace em = enterprise_management;
  34
  35 namespace policy {
  36
  37 namespace {
  38
  39 // UMA histogram names.
  40 const char kUMADelayInitialization[] =
  41     "Enterprise.UserPolicyChromeOS.DelayInitialization";
  42 const char kUMAInitialFetchClientError[] =
  43     "Enterprise.UserPolicyChromeOS.InitialFetch.ClientError";
  44 const char kUMAInitialFetchDelayClientRegister[] =
  45     "Enterprise.UserPolicyChromeOS.InitialFetch.DelayClientRegister";
  46 const char kUMAInitialFetchDelayOAuth2Token[] =
  47     "Enterprise.UserPolicyChromeOS.InitialFetch.DelayOAuth2Token";
  48 const char kUMAInitialFetchDelayPolicyFetch[] =
  49     "Enterprise.UserPolicyChromeOS.InitialFetch.DelayPolicyFetch";
  50 const char kUMAInitialFetchDelayTotal[] =
  51     "Enterprise.UserPolicyChromeOS.InitialFetch.DelayTotal";
  52 const char kUMAInitialFetchOAuth2Error[] =
  53     "Enterprise.UserPolicyChromeOS.InitialFetch.OAuth2Error";
  54 const char kUMAInitialFetchOAuth2NetworkError[] =
  55     "Enterprise.UserPolicyChromeOS.InitialFetch.OAuth2NetworkError";
  56
  57 void OnWildcardCheckCompleted(const std::string& username,
  58                               WildcardLoginChecker::Result result) {
  59   if (result == WildcardLoginChecker::RESULT_BLOCKED) {
  60     LOG(ERROR) << "Online wildcard login check failed, terminating session.";
  61
  62     // TODO(mnissler): This only removes the user pod from the login screen, but
  63     // the cryptohome remains. This is because deleting the cryptohome for a
  64     // logged-in session is not possible. Fix this either by delaying the
  65     // cryptohome deletion operation or by getting rid of the in-session
  66     // wildcard check.
  67     user_manager::UserManager::Get()->RemoveUserFromList(username);
  68     chrome::AttemptUserExit();
  69   }
  70 }
  71
  72 }  // namespace
  73
  74 UserCloudPolicyManagerChromeOS::UserCloudPolicyManagerChromeOS(
  75     scoped_ptr<CloudPolicyStore> store,
  76     scoped_ptr<CloudExternalDataManager> external_data_manager,
  77     const base::FilePath& component_policy_cache_path,
  78     bool wait_for_policy_fetch,
  79     base::TimeDelta initial_policy_fetch_timeout,
  80     const scoped_refptr<base::SequencedTaskRunner>& task_runner,
  81     const scoped_refptr<base::SequencedTaskRunner>& file_task_runner,
  82     const scoped_refptr<base::SequencedTaskRunner>& io_task_runner)
  83     : CloudPolicyManager(dm_protocol::kChromeUserPolicyType,
  84                          std::string(),
  85                          store.get(),
  86                          task_runner,
  87                          file_task_runner,
  88                          io_task_runner),
  89       store_(store.Pass()),
  90       external_data_manager_(external_data_manager.Pass()),
  91       component_policy_cache_path_(component_policy_cache_path),
  92       wait_for_policy_fetch_(wait_for_policy_fetch),
  93       policy_fetch_timeout_(false, false) {
  94   time_init_started_ = base::Time::Now();
  95   if (wait_for_policy_fetch_ && !initial_policy_fetch_timeout.is_max()) {
  96     policy_fetch_timeout_.Start(
  97         FROM_HERE,
  98         initial_policy_fetch_timeout,
  99         base::Bind(&UserCloudPolicyManagerChromeOS::OnBlockingFetchTimeout,
 100                    base::Unretained(this)));
 101   }
 102 }
 103
 104 UserCloudPolicyManagerChromeOS::~UserCloudPolicyManagerChromeOS() {}
 105
 106 void UserCloudPolicyManagerChromeOS::Connect(
 107     PrefService* local_state,
 108     DeviceManagementService* device_management_service,
 109     scoped_refptr<net::URLRequestContextGetter> system_request_context,
 110     UserAffiliation user_affiliation) {
 111   DCHECK(device_management_service);
 112   DCHECK(local_state);
 113   local_state_ = local_state;
 114   scoped_refptr<net::URLRequestContextGetter> request_context;
 115   if (system_request_context.get()) {
 116     // |system_request_context| can be null for tests.
 117     // Use the system request context here instead of a context derived
 118     // from the Profile because Connect() is called before the profile is
 119     // fully initialized (required so we can perform the initial policy load).
 120     // TODO(atwilson): Change this to use a UserPolicyRequestContext once
 121     // Connect() is called after profile initialization. http://crbug.com/323591
 122     request_context = new SystemPolicyRequestContext(
 123         system_request_context, GetUserAgent());
 124   }
 125   scoped_ptr<CloudPolicyClient> cloud_policy_client(
 126       new CloudPolicyClient(std::string(), std::string(),
 127                             kPolicyVerificationKeyHash, user_affiliation,
 128                             device_management_service, request_context));
 129   CreateComponentCloudPolicyService(component_policy_cache_path_,
 130                                     request_context, cloud_policy_client.get());
 131   core()->Connect(cloud_policy_client.Pass());
 132   client()->AddObserver(this);
 133
 134   external_data_manager_->Connect(request_context);
 135
 136   // Determine the next step after the CloudPolicyService initializes.
 137   if (service()->IsInitializationComplete()) {
 138     OnInitializationCompleted(service());
 139   } else {
 140     service()->AddObserver(this);
 141   }
 142 }
 143
 144 void UserCloudPolicyManagerChromeOS::OnAccessTokenAvailable(
 145     const std::string& access_token) {
 146   access_token_ = access_token;
 147
 148   if (!wildcard_username_.empty()) {
 149     wildcard_login_checker_.reset(new WildcardLoginChecker());
 150     wildcard_login_checker_->StartWithAccessToken(
 151         access_token,
 152         base::Bind(&OnWildcardCheckCompleted, wildcard_username_));
 153   }
 154
 155   if (service() && service()->IsInitializationComplete() &&
 156       client() && !client()->is_registered()) {
 157     OnOAuth2PolicyTokenFetched(
 158         access_token, GoogleServiceAuthError(GoogleServiceAuthError::NONE));
 159   }
 160 }
 161
 162 bool UserCloudPolicyManagerChromeOS::IsClientRegistered() const {
 163   return client() && client()->is_registered();
 164 }
 165
 166 void UserCloudPolicyManagerChromeOS::EnableWildcardLoginCheck(
 167     const std::string& username) {
 168   DCHECK(access_token_.empty());
 169   wildcard_username_ = username;
 170 }
 171
 172 void UserCloudPolicyManagerChromeOS::Shutdown() {
 173   if (client())
 174     client()->RemoveObserver(this);
 175   if (service())
 176     service()->RemoveObserver(this);
 177   token_fetcher_.reset();
 178   external_data_manager_->Disconnect();
 179   CloudPolicyManager::Shutdown();
 180 }
 181
 182 bool UserCloudPolicyManagerChromeOS::IsInitializationComplete(
 183     PolicyDomain domain) const {
 184   if (!CloudPolicyManager::IsInitializationComplete(domain))
 185     return false;
 186   if (domain == POLICY_DOMAIN_CHROME)
 187     return !wait_for_policy_fetch_;
 188   return true;
 189 }
 190
 191 void UserCloudPolicyManagerChromeOS::OnInitializationCompleted(
 192     CloudPolicyService* cloud_policy_service) {
 193   DCHECK_EQ(service(), cloud_policy_service);
 194   cloud_policy_service->RemoveObserver(this);
 195
 196   time_init_completed_ = base::Time::Now();
 197   UMA_HISTOGRAM_MEDIUM_TIMES(kUMADelayInitialization,
 198                              time_init_completed_ - time_init_started_);
 199
 200   // If the CloudPolicyClient isn't registered at this stage then it needs an
 201   // OAuth token for the initial registration.
 202   //
 203   // If |wait_for_policy_fetch_| is true then Profile initialization is blocking
 204   // on the initial policy fetch, so the token must be fetched immediately.
 205   // In that case, the signin Profile is used to authenticate a Gaia request to
 206   // fetch a refresh token, and then the policy token is fetched.
 207   //
 208   // If |wait_for_policy_fetch_| is false then the UserCloudPolicyTokenForwarder
 209   // service will eventually call OnAccessTokenAvailable() once an access token
 210   // is available. That call may have already happened while waiting for
 211   // initialization of the CloudPolicyService, so in that case check if an
 212   // access token is already available.
 213   if (!client()->is_registered()) {
 214     if (wait_for_policy_fetch_) {
 215       FetchPolicyOAuthTokenUsingSigninProfile();
 216     } else if (!access_token_.empty()) {
 217       OnAccessTokenAvailable(access_token_);
 218     }
 219   }
 220
 221   if (!wait_for_policy_fetch_) {
 222     // If this isn't blocking on a policy fetch then
 223     // CloudPolicyManager::OnStoreLoaded() already published the cached policy.
 224     // Start the refresh scheduler now, which will eventually refresh the
 225     // cached policy or make the first fetch once the OAuth2 token is
 226     // available.
 227     StartRefreshSchedulerIfReady();
 228   }
 229 }
 230
 231 void UserCloudPolicyManagerChromeOS::OnPolicyFetched(
 232     CloudPolicyClient* client) {
 233   // No action required. If we're blocked on a policy fetch, we'll learn about
 234   // completion of it through OnInitialPolicyFetchComplete().
 235 }
 236
 237 void UserCloudPolicyManagerChromeOS::OnRegistrationStateChanged(
 238     CloudPolicyClient* cloud_policy_client) {
 239   DCHECK_EQ(client(), cloud_policy_client);
 240
 241   if (wait_for_policy_fetch_) {
 242     time_client_registered_ = base::Time::Now();
 243     if (!time_token_available_.is_null()) {
 244       UMA_HISTOGRAM_MEDIUM_TIMES(
 245           kUMAInitialFetchDelayClientRegister,
 246           time_client_registered_ - time_token_available_);
 247     }
 248
 249     // If we're blocked on the policy fetch, now is a good time to issue it.
 250     if (client()->is_registered()) {
 251       service()->RefreshPolicy(
 252           base::Bind(
 253               &UserCloudPolicyManagerChromeOS::OnInitialPolicyFetchComplete,
 254               base::Unretained(this)));
 255     } else {
 256       // If the client has switched to not registered, we bail out as this
 257       // indicates the cloud policy setup flow has been aborted.
 258       CancelWaitForPolicyFetch();
 259     }
 260   }
 261 }
 262
 263 void UserCloudPolicyManagerChromeOS::OnClientError(
 264     CloudPolicyClient* cloud_policy_client) {
 265   DCHECK_EQ(client(), cloud_policy_client);
 266   if (wait_for_policy_fetch_) {
 267     UMA_HISTOGRAM_SPARSE_SLOWLY(kUMAInitialFetchClientError,
 268                                 cloud_policy_client->status());
 269   }
 270   CancelWaitForPolicyFetch();
 271 }
 272
 273 void UserCloudPolicyManagerChromeOS::OnComponentCloudPolicyUpdated() {
 274   CloudPolicyManager::OnComponentCloudPolicyUpdated();
 275   StartRefreshSchedulerIfReady();
 276 }
 277
 278 void UserCloudPolicyManagerChromeOS::GetChromePolicy(PolicyMap* policy_map) {
 279   CloudPolicyManager::GetChromePolicy(policy_map);
 280
 281   // If the store has a verified policy blob received from the server then apply
 282   // the defaults for policies that haven't been configured by the administrator
 283   // given that this is an enterprise user.
 284   if (!store()->has_policy())
 285     return;
 286   SetEnterpriseUsersDefaults(policy_map);
 287 }
 288
 289 void UserCloudPolicyManagerChromeOS::FetchPolicyOAuthTokenUsingSigninProfile() {
 290   scoped_refptr<net::URLRequestContextGetter> signin_context;
 291   Profile* signin_profile = chromeos::ProfileHelper::GetSigninProfile();
 292   if (signin_profile)
 293     signin_context = signin_profile->GetRequestContext();
 294   if (!signin_context.get()) {
 295     LOG(ERROR) << "No signin Profile for policy oauth token fetch!";
 296     OnOAuth2PolicyTokenFetched(
 297         std::string(), GoogleServiceAuthError(GoogleServiceAuthError::NONE));
 298     return;
 299   }
 300
 301   token_fetcher_.reset(new PolicyOAuth2TokenFetcher(
 302       signin_context.get(),
 303       g_browser_process->system_request_context(),
 304       base::Bind(&UserCloudPolicyManagerChromeOS::OnOAuth2PolicyTokenFetched,
 305                  base::Unretained(this))));
 306   token_fetcher_->Start();
 307 }
 308
 309 void UserCloudPolicyManagerChromeOS::OnOAuth2PolicyTokenFetched(
 310     const std::string& policy_token,
 311     const GoogleServiceAuthError& error) {
 312   DCHECK(!client()->is_registered());
 313   time_token_available_ = base::Time::Now();
 314   if (wait_for_policy_fetch_) {
 315     UMA_HISTOGRAM_MEDIUM_TIMES(kUMAInitialFetchDelayOAuth2Token,
 316                                time_token_available_ - time_init_completed_);
 317   }
 318
 319   if (error.state() == GoogleServiceAuthError::NONE) {
 320     // Start client registration. Either OnRegistrationStateChanged() or
 321     // OnClientError() will be called back.
 322     client()->Register(em::DeviceRegisterRequest::USER,
 323                        em::DeviceRegisterRequest::FLAVOR_USER_REGISTRATION,
 324                        policy_token, std::string(), std::string(),
 325                        std::string());
 326   } else {
 327     // Failed to get a token, stop waiting and use an empty policy.
 328     CancelWaitForPolicyFetch();
 329
 330     UMA_HISTOGRAM_ENUMERATION(kUMAInitialFetchOAuth2Error,
 331                               error.state(),
 332                               GoogleServiceAuthError::NUM_STATES);
 333     if (error.state() == GoogleServiceAuthError::CONNECTION_FAILED) {
 334       // Network errors are negative in the code, but the histogram data type
 335       // expects the corresponding positive value.
 336       UMA_HISTOGRAM_SPARSE_SLOWLY(kUMAInitialFetchOAuth2NetworkError,
 337                                   -error.network_error());
 338     }
 339   }
 340
 341   token_fetcher_.reset();
 342 }
 343
 344 void UserCloudPolicyManagerChromeOS::OnInitialPolicyFetchComplete(
 345     bool success) {
 346   const base::Time now = base::Time::Now();
 347   UMA_HISTOGRAM_MEDIUM_TIMES(kUMAInitialFetchDelayPolicyFetch,
 348                              now - time_client_registered_);
 349   UMA_HISTOGRAM_MEDIUM_TIMES(kUMAInitialFetchDelayTotal,
 350                              now - time_init_started_);
 351   CancelWaitForPolicyFetch();
 352 }
 353
 354 void UserCloudPolicyManagerChromeOS::OnBlockingFetchTimeout() {
 355   if (!wait_for_policy_fetch_)
 356     return;
 357   LOG(WARNING) << "Timed out while waiting for the initial policy fetch. "
 358                << "The first session will start without policy.";
 359   CancelWaitForPolicyFetch();
 360 }
 361
 362 void UserCloudPolicyManagerChromeOS::CancelWaitForPolicyFetch() {
 363   if (!wait_for_policy_fetch_)
 364     return;
 365
 366   wait_for_policy_fetch_ = false;
 367   policy_fetch_timeout_.Stop();
 368   CheckAndPublishPolicy();
 369   // Now that |wait_for_policy_fetch_| is guaranteed to be false, the scheduler
 370   // can be started.
 371   StartRefreshSchedulerIfReady();
 372 }
 373
 374 void UserCloudPolicyManagerChromeOS::StartRefreshSchedulerIfReady() {
 375   if (core()->refresh_scheduler())
 376     return;  // Already started.
 377
 378   if (wait_for_policy_fetch_)
 379     return;  // Still waiting for the initial, blocking fetch.
 380
 381   if (!service() || !local_state_)
 382     return;  // Not connected.
 383
 384   if (component_policy_service() &&
 385       !component_policy_service()->is_initialized()) {
 386     // If the client doesn't have the list of components to fetch yet then don't
 387     // start the scheduler. The |component_policy_service_| will call back into
 388     // OnComponentCloudPolicyUpdated() once it's ready.
 389     return;
 390   }
 391
 392   core()->StartRefreshScheduler();
 393   core()->TrackRefreshDelayPref(local_state_,
 394                                 policy_prefs::kUserPolicyRefreshRate);
 395 }
 396
 397 }  // namespace policy