1 /* 2 * Copyright (C) 2014 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 com.android.server.firewall; 18 19 import android.app.AppGlobals; 20 import android.content.ComponentName; 21 import android.content.Intent; 22 import android.content.pm.IPackageManager; 23 import android.content.pm.PackageManager; 24 import android.os.RemoteException; 25 import android.os.UserHandle; 26 27 import org.xmlpull.v1.XmlPullParser; 28 import org.xmlpull.v1.XmlPullParserException; 29 30 import java.io.IOException; 31 32 public class SenderPackageFilter implements Filter { 33 private static final String ATTR_NAME = "name"; 34 35 public final String mPackageName; 36 37 public SenderPackageFilter(String packageName) { 38 mPackageName = packageName; 39 } 40 41 @Override 42 public boolean matches(IntentFirewall ifw, ComponentName resolvedComponent, Intent intent, 43 int callerUid, int callerPid, String resolvedType, int receivingUid) { 44 IPackageManager pm = AppGlobals.getPackageManager(); 45 46 int packageUid = -1; 47 try { 48 // USER_SYSTEM here is not important. Only app id is used and getPackageUid() will 49 // return a uid whether the app is installed for a user or not. 50 packageUid = pm.getPackageUid(mPackageName, PackageManager.MATCH_ANY_USER, 51 UserHandle.USER_SYSTEM); 52 } catch (RemoteException ex) { 53 // handled below 54 } 55 56 if (packageUid == -1) { 57 return false; 58 } 59 60 return UserHandle.isSameApp(packageUid, callerUid); 61 } 62 63 public static final FilterFactory FACTORY = new FilterFactory("sender-package") { 64 @Override 65 public Filter newFilter(XmlPullParser parser) 66 throws IOException, XmlPullParserException { 67 String packageName = parser.getAttributeValue(null, ATTR_NAME); 68 69 if (packageName == null) { 70 throw new XmlPullParserException( 71 "A package name must be specified.", parser, null); 72 } 73 74 return new SenderPackageFilter(packageName); 75 } 76 }; 77 } 78
