}
        catch ( IOException e ) {
            throw new SpnegoException("Invalid token");
        }
    }


    @Override
    public boolean supportsIntegrity () {
        return this.mechContext.supportsIntegrity();
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.smb.SSPContext#isPreferredMech(org.bouncycastle.asn1.ASN1ObjectIdentifier)
     */
    @Override

     * @return array of supported mechanism OIDs
     */
    ASN1ObjectIdentifier[] getSupportedMechs ();


    /**
     * 
     * @return whether this mechanisms supports integrity
     */
    boolean supportsIntegrity ();


    /**
     * @param data
     * @return MIC
     * @throws CIFSException
     */
    byte[] calculateMIC ( byte[] data ) throws CIFSException;


    /**
     * @param data

        return this.gssContext != null && this.gssContext.isEstablished();
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.smb.SSPContext#supportsIntegrity()
     */
    @Override
    public boolean supportsIntegrity () {
        return true;
    }


    /**
     * {@inheritDoc}
     * 
     * @throws CIFSException
     *

        md5.update(masterKey);
        md5.update(cnst.getBytes(StandardCharsets.US_ASCII));
        md5.update((byte) 0);
        return md5.digest();
    }


    @Override
    public boolean supportsIntegrity () {
        return true;
    }


    @Override
    public boolean isMICAvailable () {
        return !this.auth.isGuest() && this.signKey != null && this.verifyKey != null;
    }