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