* @return the mechanism OID
     */
    public ASN1ObjectIdentifier getMechanism() {
        return this.mechanism;
    }

    /**
     * Sets the selected authentication mechanism OID
     * @param mechanism the mechanism OID to set
     */
    public void setMechanism(final ASN1ObjectIdentifier mechanism) {
        this.mechanism = mechanism;
    }

    @Override

    void testEmptyMechanismToken() throws IOException {
        NegTokenTarg nt = new NegTokenTarg();
        nt.setResult(NegTokenTarg.REQUEST_MIC);
        nt.setMechanismToken(new byte[0]); // empty but non‑null
        nt.setMechanism(new ASN1ObjectIdentifier("2.16.840.1.101.3.6.1"));
        nt.setMechanismListMIC(null);
        byte[] bytes = nt.toByteArray();
        NegTokenTarg parsed = new NegTokenTarg(bytes);

     */
    public NegTokenInit(final ASN1ObjectIdentifier[] mechanisms, final int contextFlags, final byte[] mechanismToken,
            final byte[] mechanismListMIC) {
        setMechanisms(mechanisms);
        setContextFlags(contextFlags);
        setMechanismToken(mechanismToken);
        setMechanismListMIC(mechanismListMIC);
    }

    /**

            if (this.firstResponse) {
                if (!this.mechContext.isSupported(targ.getMechanism())) {
                    throw new SmbException("Server chose an unsupported mechanism " + targ.getMechanism());
                }
                this.selectedMech = targ.getMechanism();
                if (targ.getResult() == NegTokenTarg.REQUEST_MIC) {
                    this.requireMic = true;