throw new PACDecodingException("Malformed Kerberos Ticket");
                try {
                    this.ticket = new KerberosTicket(derTicket.getBaseObject().getEncoded(), this.apOptions, keys);
                } catch (IOException e) {
                    throw new PACDecodingException("Malformed Kerberos Ticket", e);
                }
                break;
            case 4:

    SecretKey customKey =
        new SecretKey() {
          @Override
          public String getAlgorithm() {
            return "HmacMD5";
          }

          @Override
          public byte[] getEncoded() {
            return new byte[8];
          }

          @Override
          public String getFormat() {
            return "RAW";
          }
        };
    assertEquals(

        Cipher cipher;
        byte[] decrypt;
        byte[] code = new byte[4];
        Encdec.enc_uint32le(2, code, 0);
        byte[] codeHmac = getHmac(code, key.getEncoded());

        byte[] dataChecksum = new byte[KerberosConstants.CHECKSUM_SIZE];
        System.arraycopy(data, 0, dataChecksum, 0, KerberosConstants.CHECKSUM_SIZE);

    SecretKey customKey =
        new SecretKey() {
          @Override
          public String getAlgorithm() {
            return "HmacMD5";
          }

          @Override
          public byte[] getEncoded() {
            return new byte[8];
          }

          @Override
          public String getFormat() {
            return "RAW";
          }
        };
    assertEquals(

            Arrays.fill(dk, 0, dk.length, (byte) 0);
        }
    }


    public static byte[] deriveKeyAES ( KerberosKey key, byte[] constant ) throws GeneralSecurityException {
        byte[] keybytes = key.getEncoded();
        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keybytes, "AES"), new IvParameterSpec(ZERO_IV, 0, ZERO_IV.length));

            try {
                Key k = (Key) INQUIRE_SEC_CONTEXT.invoke(this.gssContext, new Object[] {
                    INQUIRE_TYPE_SESSION_KEY
                });
                return k.getEncoded();
            }
            catch (
                IllegalAccessException |
                IllegalArgumentException |
                InvocationTargetException ex ) {

        if (StringUtil.isNotBlank(username) && StringUtil.isNotBlank(password)) {
            final String value = username + ":" + password;
            final String basicAuth = "Basic " + java.util.Base64.getEncoder().encodeToString(value.getBytes(StandardCharsets.UTF_8));
            request.header("Authorization", basicAuth);
        }
        if (sslSocketFactory != null) {
            request.sslSocketFactory(sslSocketFactory);