@DisplayName("Various mechanism combinations round-trip correctly")
        void testMechanismCombinations(ASN1ObjectIdentifier[] mechanisms) throws Exception {
            NegTokenInit init = new NegTokenInit(mechanisms, 0, null, null);
            byte[] encoded = init.toByteArray();
            NegTokenInit parsed = new NegTokenInit(encoded);

            if (mechanisms == null) {

        // prevent nesting
        return false;
    }

    /**
     * Determines what mechanism is being used for this context.
     *
     * @return the Oid of the mechanism being used
     */
    ASN1ObjectIdentifier[] getMechs() {
        return this.mechs;
    }

    /**
     * @return the mechanisms announced by the remote end
     */

     * Gets the array of supported authentication mechanisms
     * @return the mechanisms array
     */
    public ASN1ObjectIdentifier[] getMechanisms() {
        return this.mechanisms;
    }

    /**
     * Sets the array of supported authentication mechanisms
     * @param mechanisms the mechanisms to set
     */
    public void setMechanisms(final ASN1ObjectIdentifier[] mechanisms) {
        this.mechanisms = mechanisms;

        return NTLMSSP_OID.equals(mechanism);
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.smb.SSPContext#isPreferredMech(org.bouncycastle.asn1.ASN1ObjectIdentifier)
     */
    @Override
    public boolean isPreferredMech(final ASN1ObjectIdentifier mechanism) {
        return this.auth.isPreferredMech(mechanism);
    }

    @Override

            this.established = false;
        }

        @Override
        public boolean isSupported(ASN1ObjectIdentifier mechanism) {
            if (mechanism == null) {
                return false;
            }
            for (ASN1ObjectIdentifier m : this.supportedMechs) {
                if (mechanism.equals(m)) {
                    return true;
                }
            }
            return false;
        }

    public boolean isSupported(ASN1ObjectIdentifier mechanism) {
        return KRB5_MECH_OID.equals(mechanism) || KRB5_MS_MECH_OID.equals(mechanism);
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.smb.SSPContext#isPreferredMech(org.bouncycastle.asn1.ASN1ObjectIdentifier)
     */
    @Override
    public boolean isPreferredMech(ASN1ObjectIdentifier mechanism) {
        return isSupported(mechanism);
    }

3. **Persistent Handle State**: Requires reliable state persistence mechanism
4. **Backward Compatibility**: Must maintain compatibility with SMB2/SMB1

### Mitigation Strategies
1. Implement features behind configuration flags
2. Provide graceful fallback mechanisms
3. Extensive testing with various server configurations
4. Phased rollout with beta testing

    void createContext_noKerberosNoFallback_throws() throws CIFSException {
        Kerb5Authenticator auth = new Kerb5Authenticator((Subject) null);

        // Build a token with an arbitrary non-kerberos mechanism OID
        ASN1ObjectIdentifier unsupported = new ASN1ObjectIdentifier("1.2.3.4.5");
        byte[] init = spnegoInitWithMechs(unsupported);

        // Host is a FQDN to pass the short-name check

    }

    /**
     * Check if the given mechanism is preferred for this credential
     *
     * @param mechanism the mechanism to check
     * @return whether the given mechanism is the preferred one for this credential
     */
    public boolean isPreferredMech(ASN1ObjectIdentifier mechanism) {
        return NtlmContext.NTLMSSP_OID.equals(mechanism);
    }

    /**

     */
    @Override
    public boolean isPreferredMech(ASN1ObjectIdentifier mechanism) {
        if (isAnonymous()) {
            return super.isPreferredMech(mechanism);
        }
        return PREFERRED_MECHS.contains(mechanism);
    }

    /**
     * {@inheritDoc}
     *
     * @see java.lang.Object#toString()
     */
    @Override