1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.security; 18 19 import android.content.Context; 20 import android.os.RemoteException; 21 import android.os.ServiceManager; 22 import android.os.UserHandle; 23 import android.service.gatekeeper.IGateKeeperService; 24 25 /** 26 * Convenience class for accessing the gatekeeper service. 27 * 28 * @hide 29 */ 30 public abstract class GateKeeper { 31 32 public static final long INVALID_SECURE_USER_ID = 0; 33 34 private GateKeeper() {} 35 36 public static IGateKeeperService getService() { 37 IGateKeeperService service = IGateKeeperService.Stub.asInterface( 38 ServiceManager.getService(Context.GATEKEEPER_SERVICE)); 39 if (service == null) { 40 throw new IllegalStateException("Gatekeeper service not available"); 41 } 42 return service; 43 } 44 45 public static long getSecureUserId() throws IllegalStateException { 46 try { 47 return getService().getSecureUserId(UserHandle.myUserId()); 48 } catch (RemoteException e) { 49 throw new IllegalStateException( 50 "Failed to obtain secure user ID from gatekeeper", e); 51 } 52 } 53 } 54
