File: chrome_browser_cloud_management_controller_android.cc

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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/policy/chrome_browser_cloud_management_controller_android.h"

#include <utility>

#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/task/single_thread_task_runner.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/enterprise/reporting/reporting_delegate_factory_android.h"
#include "chrome/browser/net/system_network_context_manager.h"
#include "chrome/browser/policy/android/cloud_management_shared_preferences.h"
#include "chrome/browser/policy/browser_dm_token_storage_android.h"
#include "chrome/browser/policy/chrome_browser_policy_connector.h"
#include "chrome/browser/policy/client_data_delegate_android.h"
#include "chrome/common/chrome_paths.h"
#include "components/policy/core/common/cloud/machine_level_user_cloud_policy_manager.h"
#include "components/policy/core/common/configuration_policy_provider.h"
#include "components/policy/core/common/policy_namespace.h"
#include "components/policy/core/common/policy_service.h"
#include "components/policy/policy_constants.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/network_service_instance.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"

namespace policy {

namespace {

// Responsible for triggering initialization once it can be determined if an
// enrollment token is set by non-CBCM policy providers.
class DeferredInitializationRunner
    : public PolicyService::ProviderUpdateObserver {
 public:
  explicit DeferredInitializationRunner(base::OnceClosure callback);
  DeferredInitializationRunner(const DeferredInitializationRunner&) = delete;
  DeferredInitializationRunner& operator=(const DeferredInitializationRunner&) =
      delete;
  ~DeferredInitializationRunner() override;

  // PolicyService::ProviderUpdateObserver implementation:
  void OnProviderUpdatePropagated(
      ConfigurationPolicyProvider* provider) override;

 private:
  // If set, a callback to be invoked by |OnProviderUpdatePropagated|.
  base::OnceClosure callback_;
};

DeferredInitializationRunner::DeferredInitializationRunner(
    base::OnceClosure callback)
    : callback_(std::move(callback)) {
  PolicyService* policy_service =
      g_browser_process->browser_policy_connector()->GetPolicyService();
  policy_service->AddProviderUpdateObserver(this);
}

DeferredInitializationRunner::~DeferredInitializationRunner() {
  if (callback_) {
    PolicyService* policy_service =
        g_browser_process->browser_policy_connector()->GetPolicyService();
    policy_service->RemoveProviderUpdateObserver(this);
  }
}

void DeferredInitializationRunner::OnProviderUpdatePropagated(
    ConfigurationPolicyProvider* provider) {
  if (!callback_ || provider != g_browser_process->browser_policy_connector()
                                    ->GetPlatformProvider()) {
    return;
  }

  PolicyService* policy_service =
      g_browser_process->browser_policy_connector()->GetPolicyService();
  if (!policy_service
           ->GetPolicies(PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()))
           .Get(key::kCloudManagementEnrollmentToken)) {
    return;
  }

  policy_service->RemoveProviderUpdateObserver(this);
  std::move(callback_).Run();
}

bool CloudManagementEnrollmentTokenPolicyAvailable() {
  DCHECK(g_browser_process);
  DCHECK(g_browser_process->browser_policy_connector());
  DCHECK(g_browser_process->browser_policy_connector()->GetPolicyService());

  return g_browser_process->browser_policy_connector()
      ->GetPolicyService()
      ->GetPolicies(PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()))
      .Get(key::kCloudManagementEnrollmentToken);
}

}  // namespace

ChromeBrowserCloudManagementControllerAndroid::
    ChromeBrowserCloudManagementControllerAndroid() = default;
ChromeBrowserCloudManagementControllerAndroid::
    ~ChromeBrowserCloudManagementControllerAndroid() = default;

void ChromeBrowserCloudManagementControllerAndroid::
    SetDMTokenStorageDelegate() {
  BrowserDMTokenStorage::SetDelegate(
      std::make_unique<BrowserDMTokenStorageAndroid>());
}

int ChromeBrowserCloudManagementControllerAndroid::GetUserDataDirKey() {
  return chrome::DIR_USER_DATA;
}

base::FilePath
ChromeBrowserCloudManagementControllerAndroid::GetExternalPolicyDir() {
  // External policies are not supported on Android.
  return base::FilePath();
}

ChromeBrowserCloudManagementController::Delegate::NetworkConnectionTrackerGetter
ChromeBrowserCloudManagementControllerAndroid::
    CreateNetworkConnectionTrackerGetter() {
  return base::BindRepeating(&content::GetNetworkConnectionTracker);
}

void ChromeBrowserCloudManagementControllerAndroid::InitializeOAuthTokenFactory(
    scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
    PrefService* local_state) {
  // Policy invalidations aren't currently supported on Android.
}

void ChromeBrowserCloudManagementControllerAndroid::StartWatchingRegistration(
    ChromeBrowserCloudManagementController* controller) {
  // Enrollment isn't blocking or mandatory on Android.
}

bool ChromeBrowserCloudManagementControllerAndroid::
    IsEnterpriseStartupDialogShowing() {
  // There is no enterprise startup dialog on Android.
  return false;
}

bool ChromeBrowserCloudManagementControllerAndroid::
    WaitUntilPolicyEnrollmentFinished() {
  // Enrollment currently isn't blocking or mandatory on Android, so this method
  // isn't used. Always report success.
  return true;
}

void ChromeBrowserCloudManagementControllerAndroid::OnServiceAccountSet(
    CloudPolicyClient* client,
    const std::string& account_email) {
  // Policy invalidations aren't currently supported on Android.
}

void ChromeBrowserCloudManagementControllerAndroid::ShutDown() {
  // No additional shutdown to perform on Android.
}

MachineLevelUserCloudPolicyManager*
ChromeBrowserCloudManagementControllerAndroid::
    GetMachineLevelUserCloudPolicyManager() {
  return g_browser_process->browser_policy_connector()
      ->machine_level_user_cloud_policy_manager();
}

DeviceManagementService*
ChromeBrowserCloudManagementControllerAndroid::GetDeviceManagementService() {
  return g_browser_process->browser_policy_connector()
      ->device_management_service();
}

scoped_refptr<network::SharedURLLoaderFactory>
ChromeBrowserCloudManagementControllerAndroid::GetSharedURLLoaderFactory() {
  return g_browser_process->system_network_context_manager()
      ->GetSharedURLLoaderFactory();
}

scoped_refptr<base::SingleThreadTaskRunner>
ChromeBrowserCloudManagementControllerAndroid::GetBestEffortTaskRunner() {
  // ChromeBrowserCloudManagementControllerAndroid is bound to BrowserThread::UI
  // and so must its best-effort task runner.
  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  return content::GetUIThreadTaskRunner({base::TaskPriority::BEST_EFFORT});
}

std::unique_ptr<enterprise_reporting::ReportingDelegateFactory>
ChromeBrowserCloudManagementControllerAndroid::GetReportingDelegateFactory() {
  return std::make_unique<
      enterprise_reporting::ReportingDelegateFactoryAndroid>();
}

void ChromeBrowserCloudManagementControllerAndroid::SetGaiaURLLoaderFactory(
    scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory) {
  // Policy invalidations aren't currently supported on Android.
}

bool ChromeBrowserCloudManagementControllerAndroid::
    ReadyToCreatePolicyManager() {
  // On Android, policy manager creation can happen if either:
  //  - a DM token was cached in Shared Preferences by a previous browser run;
  //  - an enrollment token is available via platform policies.
  //
  // If a DM token is available, then the policy manager can be created right
  // away.
  //
  // Otherwise, creation needs to be postponed until the PolicyService has been
  // initialized. Since this method can be called during PolicyService creation,
  // additional checks (such as if the g_browser_process variable is set) are
  // needed. When postponed, policy manager creation will happen during
  // controller initialization, when it's guaranteed that the PolicyService
  // exists and is initialized.
  return !android::ReadDmTokenFromSharedPreferences().empty() ||
         (g_browser_process && g_browser_process->browser_policy_connector() &&
          g_browser_process->browser_policy_connector()->HasPolicyService() &&
          CloudManagementEnrollmentTokenPolicyAvailable());
}

bool ChromeBrowserCloudManagementControllerAndroid::ReadyToInit() {
  return !android::ReadDmTokenFromSharedPreferences().empty() ||
         CloudManagementEnrollmentTokenPolicyAvailable();
}

std::unique_ptr<ClientDataDelegate>
ChromeBrowserCloudManagementControllerAndroid::CreateClientDataDelegate() {
  return std::make_unique<ClientDataDelegateAndroid>();
}

void ChromeBrowserCloudManagementControllerAndroid::DeferInitialization(
    base::OnceClosure callback) {
  DCHECK(callback);
  DCHECK(g_browser_process);
  DCHECK(g_browser_process->browser_policy_connector());

  provider_update_observer_ =
      std::make_unique<DeferredInitializationRunner>(std::move(callback));
}

}  // namespace policy