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 17 package com.android.server.firewall; 18 19 import android.content.Intent; 20 import android.content.pm.ApplicationInfo; 21 import org.xmlpull.v1.XmlPullParser; 22 import org.xmlpull.v1.XmlPullParserException; 23 24 import java.io.IOException; 25 26 class SenderPermissionFilter implements Filter { 27 private static final String ATTR_NAME = "name"; 28 29 private final String mPermission; 30 31 private SenderPermissionFilter(String permission) { 32 mPermission = permission; 33 } 34 35 @Override 36 public boolean matches(IntentFirewall ifw, Intent intent, ApplicationInfo callerApp, 37 int callerUid, int callerPid, String resolvedType, ApplicationInfo resolvedApp) { 38 // We assume the component is exported here. If the component is not exported, then 39 // ActivityManager would only resolve to this component for callers from the same uid. 40 // In this case, it doesn't matter whether the component is exported or not. 41 return ifw.checkComponentPermission(mPermission, callerPid, callerUid, resolvedApp.uid, 42 true); 43 } 44 45 public static final FilterFactory FACTORY = new FilterFactory("sender-permission") { 46 @Override 47 public Filter newFilter(XmlPullParser parser) 48 throws IOException, XmlPullParserException { 49 String permission = parser.getAttributeValue(null, ATTR_NAME); 50 if (permission == null) { 51 throw new XmlPullParserException("Permission name must be specified.", 52 parser, null); 53 } 54 return new SenderPermissionFilter(permission); 55 } 56 }; 57 } 58
