flags = NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_OEM;
            charset = getOEMEncoding();
        } else {
            _sessionKey = readSecurityBuffer(material, 52);
            flags = readULong(material, 60);
            charset = ((flags & NTLMSSP_NEGOTIATE_UNICODE) != 0) ?
                UNI_ENCODING : getOEMEncoding();
        }
        setSessionKey(_sessionKey);
        setFlags(flags);

    }


    @Override
    public byte[] toByteArray () throws IOException {
        int size = 64;
        boolean unicode = getFlag(NTLMSSP_NEGOTIATE_UNICODE);
        String oemCp = unicode ? null : getOEMEncoding();

        String domainName = getDomain();
        byte[] domainBytes = null;
        if ( domainName != null && domainName.length() != 0 ) {