/**
* 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.ws.security.message.token;
import java.security.Principal;
import java.security.PrivilegedAction;
import javax.security.auth.kerberos.KerberosPrincipal;
import org.ietf.jgss.GSSContext;
import org.ietf.jgss.GSSCredential;
import org.ietf.jgss.GSSException;
import org.ietf.jgss.GSSManager;
import org.ietf.jgss.GSSName;
import org.ietf.jgss.Oid;
/**
* This class represents a PrivilegedAction implementation to validate a received ticket to a KDC.
*/
public class KerberosServiceAction implements PrivilegedAction<Principal> {
private static org.apache.commons.logging.Log log =
org.apache.commons.logging.LogFactory.getLog(KerberosServiceAction.class);
private byte[] ticket;
private String serviceName;
public KerberosServiceAction(byte[] ticket, String serviceName) {
this.ticket = ticket;
this.serviceName = serviceName;
}
public Principal run() {
try {
GSSManager gssManager = GSSManager.getInstance();
Oid kerberos5Oid = new Oid("1.2.840.113554.1.2.2");
GSSName gssService = gssManager.createName(serviceName, GSSName.NT_HOSTBASED_SERVICE);
GSSCredential credentials =
gssManager.createCredential(
gssService, GSSCredential.DEFAULT_LIFETIME, kerberos5Oid, GSSCredential.ACCEPT_ONLY
);
GSSContext secContext =
gssManager.createContext(credentials);
secContext.acceptSecContext(ticket, 0, ticket.length);
GSSName clientName = secContext.getSrcName();
secContext.dispose();
return new KerberosPrincipal(clientName.toString());
} catch (GSSException e) {
if (log.isDebugEnabled()) {
log.debug("Error in validating a Kerberos token", e);
}
}
return null;
}
}