}
            log.trace("VALIDATE_NEGOTIATE_INFO returned error", e);
            if ( ( req.getResponse().isReceived() && req.getResponse().isVerifyFailed() ) || e.getNtStatus() == NtStatus.NT_STATUS_ACCESS_DENIED ) {
                // this is the signature error
                throw new SMBProtocolDowngradeException("Signature error during negotiate validation", e);

            }
            throw new SmbException(resp.getErrorCode(), null);
        }
        if ( resp.isVerifyFailed() ) {
            throw new SmbException("Signature verification failed.");
        }
        return cont;
    }


    /**
     * @param request
     * @param response