1 /** 2 * Copyright (c) 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 package com.android.pacprocessor; 17 18 import android.app.Service; 19 import android.content.Intent; 20 import android.os.Binder; 21 import android.os.IBinder; 22 import android.os.Process; 23 import android.os.RemoteException; 24 import android.util.Log; 25 26 import com.android.net.IProxyService; 27 28 import java.net.MalformedURLException; 29 import java.net.URL; 30 31 public class PacService extends Service { 32 private static final String TAG = "PacService"; 33 34 private PacNative mPacNative; 35 private ProxyServiceStub mStub; 36 37 @Override 38 public void onCreate() { 39 super.onCreate(); 40 if (mPacNative == null) { 41 mPacNative = new PacNative(); 42 mStub = new ProxyServiceStub(mPacNative); 43 } 44 } 45 46 @Override 47 public void onDestroy() { 48 super.onDestroy(); 49 if (mPacNative != null) { 50 mPacNative.stopPacSupport(); 51 mPacNative = null; 52 mStub = null; 53 } 54 } 55 56 @Override 57 public IBinder onBind(Intent intent) { 58 if (mPacNative == null) { 59 mPacNative = new PacNative(); 60 mStub = new ProxyServiceStub(mPacNative); 61 } 62 return mStub; 63 } 64 65 private static class ProxyServiceStub extends IProxyService.Stub { 66 private final PacNative mPacNative; 67 68 public ProxyServiceStub(PacNative pacNative) { 69 mPacNative = pacNative; 70 } 71 72 @Override 73 public String resolvePacFile(String host, String url) throws RemoteException { 74 try { 75 // Check for characters that could be used for an injection attack. 76 new URL(url); 77 for (char c : host.toCharArray()) { 78 if (!Character.isLetterOrDigit(c) && (c != '.') && (c != '-')) { 79 throw new RemoteException("Invalid host was passed"); 80 } 81 } 82 return mPacNative.makeProxyRequest(url, host); 83 } catch (MalformedURLException e) { 84 throw new RemoteException("Invalid URL was passed"); 85 } 86 } 87 88 @Override 89 public void setPacFile(String script) throws RemoteException { 90 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 91 Log.e(TAG, "Only system user is allowed to call setPacFile"); 92 throw new SecurityException(); 93 } 94 mPacNative.setCurrentProxyScript(script); 95 } 96 97 @Override 98 public void startPacSystem() throws RemoteException { 99 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 100 Log.e(TAG, "Only system user is allowed to call startPacSystem"); 101 throw new SecurityException(); 102 } 103 mPacNative.startPacSupport(); 104 } 105 106 @Override 107 public void stopPacSystem() throws RemoteException { 108 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 109 Log.e(TAG, "Only system user is allowed to call stopPacSystem"); 110 throw new SecurityException(); 111 } 112 mPacNative.stopPacSupport(); 113 } 114 } 115 } 116
