* @param mechanism
     * @return whether the specified mechanism is supported
     */
    boolean isSupported ( ASN1ObjectIdentifier mechanism );


    /**
     * @param selectedMech
     * @return whether the specified mechanism is preferred
     */
    boolean isPreferredMech ( ASN1ObjectIdentifier selectedMech );


    /**
     * @return context flags
     */
    int getFlags ();


    /**

    private boolean firstResponse = true;
    private boolean completed;

    private ASN1ObjectIdentifier[] mechs;
    private ASN1ObjectIdentifier selectedMech;
    private ASN1ObjectIdentifier[] remoteMechs;

    private boolean disableMic;
    private boolean requireMic;


    /**
     * Instance a <code>SpnegoContext</code> object by wrapping a {@link SSPContext}

    public static final int INTEGRITY = 0x02;

    private static final ASN1ObjectIdentifier SPNEGO_OID = new ASN1ObjectIdentifier(SpnegoConstants.SPNEGO_MECHANISM);

    private ASN1ObjectIdentifier[] mechanisms;

    private int contextFlags;


    public NegTokenInit () {}


    public NegTokenInit ( ASN1ObjectIdentifier[] mechanisms, int contextFlags, byte[] mechanismToken, byte[] mechanismListMIC ) {

    public static final int REJECTED = 2;
    public static final int REQUEST_MIC = 3;

    private ASN1ObjectIdentifier mechanism;

    private int result = UNSPECIFIED_RESULT;


    public NegTokenTarg () {}


    public NegTokenTarg ( int result, ASN1ObjectIdentifier mechanism, byte[] mechanismToken, byte[] mechanismListMIC ) {
        setResult(result);
        setMechanism(mechanism);

    private static final ASN1ObjectIdentifier KRB5_MECH_OID;
    private static final ASN1ObjectIdentifier KRB5_MS_MECH_OID;
    static final ASN1ObjectIdentifier[] SUPPORTED_MECHS;
    private static final Oid JGSS_KRB5_NAME_OID;
    private static final Oid JGSS_KRB5_MECH_OID;

    static {
        KRB5_MECH_OID = new ASN1ObjectIdentifier("1.2.840.113554.1.2.2");

    private boolean canFallback = false;
    private boolean forceFallback;

    static {
        PREFERRED_MECHS.add(new ASN1ObjectIdentifier("1.2.840.113554.1.2.2"));
        PREFERRED_MECHS.add(new ASN1ObjectIdentifier("1.2.840.48018.1.2.2"));
    }


    /**
     * Construct a <code>Kerb5Authenticator</code> object with <code>Subject</code>

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.smb;


import java.util.Objects;

import org.bouncycastle.asn1.ASN1ObjectIdentifier;


/**
 * This class is used to parse the name of context initiator and
 * context acceptor which are retrieved from GSSContext.
 * 
 * @author Shun
 *
 */
class MIEName {

     * @see jcifs.smb.SSPContext#isSupported(org.bouncycastle.asn1.ASN1ObjectIdentifier)
     */
    @Override
    public boolean isSupported ( ASN1ObjectIdentifier mechanism ) {
        return NTLMSSP_OID.equals(mechanism);
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.smb.SSPContext#isPreferredMech(org.bouncycastle.asn1.ASN1ObjectIdentifier)
     */
    @Override

            throw new PACDecodingException("Malformed kerberos token", e);
        }

        try ( ASN1InputStream stream = new ASN1InputStream(content) ) {

            ASN1ObjectIdentifier kerberosOid = (ASN1ObjectIdentifier) stream.readObject();
            if ( !kerberosOid.getId().equals(KerberosConstants.KERBEROS_OID) )
                throw new PACDecodingException("Not a kerberos token");

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;
import jcifs.RuntimeCIFSException;