content: /*
   * Copyright (C) 2015 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.security;
  
  import android.annotation.UnsupportedAppUsage;
  import android.content.Context;
  import android.os.RemoteException;
  import android.os.ServiceManager;
  import android.os.UserHandle;
  import android.service.gatekeeper.IGateKeeperService;
  
  /**
   * Convenience class for accessing the gatekeeper service.
   *
   * @hide
   */
  public abstract class GateKeeper {
  
      public static final long INVALID_SECURE_USER_ID = 0;
  
      private GateKeeper() {}
  
      public static IGateKeeperService getService() {
          IGateKeeperService service = IGateKeeperService.Stub.asInterface(
                  ServiceManager.getService(Context.GATEKEEPER_SERVICE));
          if (service == null) {
              throw new IllegalStateException("Gatekeeper service not available");
          }
          return service;
      }
  
      @UnsupportedAppUsage
      public static long getSecureUserId() throws IllegalStateException {
          try {
              return getService().getSecureUserId(UserHandle.myUserId());
          } catch (RemoteException e) {
              throw new IllegalStateException(
                      "Failed to obtain secure user ID from gatekeeper", e);
          }
      }
  }
  