* @param mechs
     * @return
     * @throws CIFSException
     */
    private static byte[] encodeMechs ( ASN1ObjectIdentifier[] mechs ) throws CIFSException {
        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            ASN1OutputStream dos = ASN1OutputStream.create(bos, ASN1Encoding.DER);
            dos.writeObject(new DERSequence(mechs));
            dos.close();
            return bos.toByteArray();