/**
         * 
         */
        private static final long serialVersionUID = -4979600496889213143L;


        public RefreshableKerb5Authenticator ( Subject subject, String domain, String username, String password ) {
            super(subject, domain, username, password);
        }


        @Override
        public void refresh () throws CIFSException {
            try {

import java.security.MessageDigest;
import java.security.Principal;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;

import javax.security.auth.Subject;

import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.CIFSContext;
import jcifs.CIFSException;
import jcifs.Credentials;

            throw new SmbException("Context setup failed", e);
        }
    }


    /**
     * @param subject
     *            the subject to set
     */
    protected void setSubject ( Subject subject ) {
        this.subject = subject;
    }


    @Override
    public void refresh () throws CIFSException {

import java.util.List;
import java.util.Set;

import javax.security.auth.Subject;
import javax.security.auth.kerberos.KerberosKey;
import javax.security.auth.kerberos.KeyTab;
import javax.security.auth.login.LoginContext;
import javax.security.auth.login.LoginException;


@SuppressWarnings ( "javadoc" )
public class KerberosCredentials {

    private Subject subject;


    public KerberosCredentials () throws LoginException {

	    }
            lc.login();

            Subject s = lc.getSubject();
            if ( log.isDebugEnabled() ) {
                log.debug("Got subject: " + s.getPrincipals());
            }
            if ( log.isTraceEnabled() ) {
                log.trace("Got subject " + s);
            }

            this.cachedSubject = s;
            return this.cachedSubject;

            }
        }
    }


    private static byte[] createToken ( final SSPContext ctx, final byte[] token, Subject s ) throws CIFSException {
        if ( s != null ) {
            try {
                return Subject.doAs(s, new PrivilegedExceptionAction<byte[]>() {

                    @Override
                    public byte[] run () throws Exception {

  10. Each time you redistribute the Library (or any work based on the
Library), the recipient automatically receives a license from the
original licensor to copy, distribute, link with or modify the Library
subject to these terms and conditions.  You may not impose any further
restrictions on the recipients' exercise of the rights granted herein.
You are not responsible for enforcing compliance by third parties with
this License.

     */
    SSPContext createContext ( CIFSContext tc, String targetDomain, String host, byte[] initialToken, boolean doSigning ) throws SmbException;


    /**
     * @return subject associated with the credentials
     */
    Subject getSubject ();


    /**
     * @throws CIFSException
     * 
     */
    void refresh () throws CIFSException;

        }
    }


    Key searchSessionKey ( Subject subject ) throws GSSException {
        MIEName src = new MIEName(this.gssContext.getSrcName().export());
        MIEName targ = new MIEName(this.gssContext.getTargName().export());

        ASN1ObjectIdentifier mech = ASN1ObjectIdentifier.getInstance(this.gssContext.getMech().getDER());
        for ( KerberosTicket ticket : subject.getPrivateCredentials(KerberosTicket.class) ) {