1 /* 2 * Copyright 2013 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.cts.activity; 18 19 import android.os.Handler; 20 import android.os.IBinder; 21 import android.os.Message; 22 import android.security.cts.activity.ISecureRandomService; 23 24 import android.app.Service; 25 import android.content.Intent; 26 27 import java.security.SecureRandom; 28 29 public class SecureRandomService extends Service { 30 /** 31 * This helps the process shut down a little faster and get us a new 32 * PID earlier than calling stopService. 33 */ 34 private Handler mShutdownHandler = new Handler() { 35 @Override 36 public void handleMessage(Message msg) { 37 stopSelf(); 38 } 39 }; 40 41 private final ISecureRandomService.Stub mBinder = new ISecureRandomService.Stub() { 42 43 /** 44 * Returns output from SecureRandom and the current process PID. Note 45 * that this should only be called once. To ensure that it's only called 46 * once, this will throw an error if it's called twice in a row. 47 */ 48 public int getRandomBytesAndPid(byte[] randomBytes) { 49 mShutdownHandler.sendEmptyMessage(-1); 50 51 SecureRandom sr = new SecureRandom(); 52 sr.nextBytes(randomBytes); 53 return android.os.Process.myPid(); 54 } 55 }; 56 57 @Override 58 public IBinder onBind(Intent intent) { 59 return mBinder; 60 } 61 } 62
