try {
            return MessageDigest.getInstance("MD4", getProvider());
        }
        catch ( NoSuchAlgorithmException e ) {
            throw new CIFSUnsupportedCryptoException(e);
        }
    }


    /**
     * 
     * @return MD5 digest
     */
    public static MessageDigest getMD5 () {
        try {
            return MessageDigest.getInstance("MD5");
        }

                ASN1Sequence sequence = ASN1Sequence.getInstance(tagged, true);
                Enumeration<ASN1Object> fields = sequence.getObjects();
                while ( fields.hasMoreElements() ) {
                    tagged = (ASN1TaggedObject) fields.nextElement();
                    switch ( tagged.getTagNo() ) {
                    case 0:
                        sequence = ASN1Sequence.getInstance(tagged, true);

        case Smb2Constants.SMB2_DIALECT_0210:
            m = Mac.getInstance("HmacSHA256");
            signingKey = sessionKey;
            break;
        case Smb2Constants.SMB2_DIALECT_0300:
        case Smb2Constants.SMB2_DIALECT_0302:
            signingKey = Smb3KeyDerivation.deriveSigningKey(dialect, sessionKey, new byte[0] /* unimplemented */);
            m = Mac.getInstance("AESCMAC", Crypto.getProvider());
            break;