for ( KerberosKey key : keys ) {
                    keysByAlgo.put(key.getKeyType(), key);
                }

                KerberosKey serverKey = keysByAlgo.get(encType.getValue().intValue());
                if ( keysByAlgo.isEmpty() || serverKey == null ) {
                    throw new PACDecodingException("Kerberos key not found for eType " + encType.getValue());
                }

    /**
     * @param type
     * @param keys
     * @return the calculated mac
     * @throws PACDecodingException
     */
    public static byte[] calculateMac ( int type, Map<Integer, KerberosKey> keys, byte[] data ) throws PACDecodingException {
        try {
            int usage = 17;
            if ( type == PacSignature.KERB_CHECKSUM_HMAC_MD5 ) {
                KerberosKey key = keys.get(PacSignature.ETYPE_ARCFOUR_HMAC);

@SuppressWarnings ( "javadoc" )
public class KerberosRelevantAuthData extends KerberosAuthData {

    private List<KerberosAuthData> authorizations;


    public KerberosRelevantAuthData ( byte[] token, Map<Integer, KerberosKey> keys ) throws PACDecodingException {
        ASN1Sequence authSequence;
        try {
            try ( ASN1InputStream stream = new ASN1InputStream(new ByteArrayInputStream(token)) ) {

        key8[2] = (byte)(( ((key7[1] & 0x03) << 5) | (((key7[2] & 0xff)>>3) & 0xff)) & 0xff );
        key8[3] = (byte)(( ((key7[2] & 0x07) << 4) | (((key7[3] & 0xff)>>4) & 0xff)) & 0xff );
        key8[4] = (byte)(( ((key7[3] & 0x0F) << 3) | (((key7[4] & 0xff)>>5) & 0xff)) & 0xff );
        key8[5] = (byte)(( ((key7[4] & 0x1F) << 2) | (((key7[5] & 0xff)>>6) & 0xff)) & 0xff );

                }
                break;
            default:
                throw new PACDecodingException("Unknown field " + tagged.getTagNo());
            }
        }
    }


    public static byte[] decrypt ( byte[] data, Key key, int type ) throws GeneralSecurityException {
        Cipher cipher = null;

        byte[] keyb = Hex.decode(key);
        byte[] datab = data.getBytes(StandardCharsets.US_ASCII);
        byte[] javaMac = sun.security.krb5.internal.crypto.ArcFourHmac.calculateChecksum(keyb, usage, datab, 0, datab.length);
        byte[] mac = PacMac.calculateMacArcfourHMACMD5(usage, makeKey(keyb, 23), datab);

@SuppressWarnings ( "javadoc" )
public class KerberosApRequest {

    private byte apOptions;
    private KerberosTicket ticket;


    public KerberosApRequest ( byte[] token, KerberosKey[] keys ) throws PACDecodingException {
        this(parseSequence(token), keys);
    }

    private static ASN1Sequence parseSequence(byte[] token) throws PACDecodingException {
        if ( token.length <= 0 )

    private KerberosApRequest apRequest;


    public KerberosToken ( byte[] token ) throws PACDecodingException {
        this(token, null);
    }


    public KerberosToken ( byte[] token, KerberosKey[] keys ) throws PACDecodingException {

        if ( token.length <= 0 )
            throw new PACDecodingException("Empty kerberos token");

        byte[] content;

                if (_klen == key.length()) {
                    match = _key.equals(key);
                } else if (_klen < key.length()) {
                    match = _key.regionMatches(0, key, 0, _klen) && key.charAt(_klen) == '\\';
                }

                if (match)
                    dr = (DfsReferral)referrals.map.get(_key);
            }
        }

        return dr;
    }

public class Trans2FindFirst2 extends SmbComTransaction {

    // flags

    static final int FLAGS_CLOSE_AFTER_THIS_REQUEST = 0x01;
    static final int FLAGS_CLOSE_IF_END_REACHED = 0x02;
    static final int FLAGS_RETURN_RESUME_KEYS = 0x04;
    static final int FLAGS_RESUME_FROM_PREVIOUS_END = 0x08;
    static final int FLAGS_FIND_WITH_BACKUP_INTENT = 0x10;

    private int searchAttributes;
    private int tflags;
    private int informationLevel;