assertEquals(
        "Hashing.hmacMd5(Key[algorithm=HmacMD5, format=RAW])", Hashing.hmacMd5(keyData).toString());

    assertEquals(
        "Hashing.hmacSha1(Key[algorithm=HmacSHA1, format=RAW])",
        Hashing.hmacSha1(SHA1_KEY).toString());
    assertEquals(
        "Hashing.hmacSha1(Key[algorithm=HmacSHA1, format=RAW])",
        Hashing.hmacSha1(keyData).toString());

   * href="https://datatracker.ietf.org/doc/html/rfc6151#section-2.3">over {@code hmacMd5}</a>.
   *
   * @param key the secret key
   * @throws IllegalArgumentException if the given key is inappropriate for initializing this MAC
   * @since 20.0
   */
  public static HashFunction hmacMd5(Key key) {
    return new MacHashFunction("HmacMD5", key, hmacToString("hmacMd5", key));
  }

  /**

    static final int AUTH_DATA_PAC = 128;

    static final int DES_ENC_TYPE = 3;
    static final int RC4_ENC_TYPE = 23;
    static final String RC4_ALGORITHM = "ARCFOUR";
    static final String HMAC_ALGORITHM = "HmacMD5";
    static final int CONFOUNDER_SIZE = 8;
    static final int CHECKSUM_SIZE = 16;

    };


    public static byte[] calculateMacArcfourHMACMD5 ( int keyusage, Key key, byte[] data ) throws GeneralSecurityException {
        int ms_usage = mapArcfourMD5KeyUsage(keyusage);
        Mac mac = Mac.getInstance("HmacMD5");
        MessageDigest md = MessageDigest.getInstance("MD5");
        mac.init(key);
        byte[] dk = mac.doFinal(MD5_CONSTANT);
        try {
            // little endian

    }


    private static void testJavaHMAC ( String key, byte[] bytes, String expect ) throws NoSuchAlgorithmException, InvalidKeyException {
        Mac m = Mac.getInstance("HmacMD5");
        m.init(new SecretKeySpec(Hex.decode(key), "HMAC"));
        byte[] mac = m.doFinal(bytes);
        checkBytes(Hex.decode(expect), mac);
    }


    @Test