/**
     *
     */
    @Test
    public void testDigest() {
        final String text = "hoge";
        assertNull(MessageDigestUtil.digest("MD5", null));
        assertEquals("ea703e7aa1efda0064eaa507d9e8ab7e", MessageDigestUtil.digest("MD5", text));
        assertEquals("31f30ddbcb1bf8446576f0e64aa4c88a9f055e3c", MessageDigestUtil.digest("SHA-1", text));

    {
        byte[] sessionHash = new byte[8];

        try {
            MessageDigest md5;
            md5 = MessageDigest.getInstance("MD5");
            md5.update(serverChallenge);
            md5.update(clientChallenge, 0, 8);
            System.arraycopy(md5.digest(), 0, sessionHash, 0, 8);
        } catch (GeneralSecurityException gse) {
            if (log.level > 0)

            throw new CIFSUnsupportedCryptoException(e);
        }
    }


    /**
     * 
     * @return MD5 digest
     */
    public static MessageDigest getMD5 () {
        try {
            return MessageDigest.getInstance("MD5");
        }
        catch ( NoSuchAlgorithmException e ) {
            throw new CIFSUnsupportedCryptoException(e);
        }
    }


    /**

                    enc-part
                        etype: eTYPE-ARCFOUR-HMAC-MD5 (23)
                        kvno: 5
                        cipher: 508c1fb7944c336ead0edf4536ba1ecf7102923d9dc9e0ab1d5c73d0d3bb4ca6a1120cdd…
                authenticator
                    etype: eTYPE-ARCFOUR-HMAC-MD5 (23)
                    cipher: e24ff60648505a37d583d77e20a845158b7cfe8c652ab16d0eeeb4c8700370e5d640bbdd…