if( log.level >= 5 ) {
            log.println("macSigningKey:");
            Hexdump.hexdump( log, macSigningKey, 0, macSigningKey.length );
        }
    }

    public SigningDigest( SmbTransport transport,
                NtlmPasswordAuthentication auth ) throws SmbException {
        try {
            digest = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException ex) {