/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.firewall;
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import android.content.ComponentName;
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import android.content.Intent;
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import org.xmlpull.v1.XmlPullParser;
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import org.xmlpull.v1.XmlPullParserException;
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import java.io.IOException;
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class SenderPermissionFilter implements Filter {
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private static final String ATTR_NAME = "name";
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private final String mPermission;
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private SenderPermissionFilter(String permission) {
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mPermission = permission;
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}
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@Override
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public boolean matches(IntentFirewall ifw, ComponentName resolvedComponent, Intent intent,
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int callerUid, int callerPid, String resolvedType, int receivingUid) {
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// We assume the component is exported here. If the component is not exported, then
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// ActivityManager would only resolve to this component for callers from the same uid.
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// In this case, it doesn't matter whether the component is exported or not.
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return ifw.checkComponentPermission(mPermission, callerPid, callerUid, receivingUid,
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true);
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}
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public static final FilterFactory FACTORY = new FilterFactory("sender-permission") {
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@Override
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public Filter newFilter(XmlPullParser parser)
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throws IOException, XmlPullParserException {
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String permission = parser.getAttributeValue(null, ATTR_NAME);
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if (permission == null) {
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throw new XmlPullParserException("Permission name must be specified.",
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parser, null);
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}
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return new SenderPermissionFilter(permission);
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}
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};
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}
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