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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.tuscany.sca.policy.security;
import java.security.Principal;
import javax.security.auth.Subject;
import org.apache.tuscany.sca.invocation.Message;
/**
* Some utilities for dealing with security information in a Tuscany message
*
* @version $Rev$ $Date$
* @tuscany.spi.extension.asclient
*/
public class SecurityUtil {
public static String SubjectString = "Subject";
public static String PrincipalString = "Principal";
public static Subject getSubject(Message msg){
Subject subject = (Subject)msg.getHeaders().get(SubjectString);
if (subject == null){
subject = new Subject();
msg.getHeaders().put(SubjectString, subject);
}
return subject;
}
public static <T> T getPrincipal(Subject subject, Class<T> clazz){
for (Principal msgPrincipal : subject.getPrincipals() ){
if (clazz.isInstance(msgPrincipal)){
return clazz.cast(msgPrincipal);
}
}
return null;
}
public static Principal getPrincipal(Message msg){
return (Principal)msg.getHeaders().get(PrincipalString);
}
}
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