if (size < 33 || 4 + size > this.sbuf.length) {
            throw new IOException("Invalid payload size: " + size);
        }
        final int hdrSize = this.smb2 ? Smb2Constants.SMB2_HEADER_LENGTH : SMB1_HEADER_LENGTH;
        readn(this.in, this.sbuf, 4 + hdrSize, size - hdrSize);
        log.trace("Read negotiate response");
    }

    /**
     * @param first
     * @param n
     * @return

}

// Malform chunk size given a request signed using streaming signatureV4.
func malformChunkSizeSigV4(req *http.Request, badSize int64) (*http.Request, error) {
	bufReader := bufio.NewReader(req.Body)
	_, chunkSignature, err := readChunkLine(bufReader)
	if err != nil {
		return nil, err
	}

	n := badSize
	newHexChunkSize := fmt.Appendf(nil, "%x", n)
	newChunkHdr := fmt.Appendf(nil, "%s"+s3ChunkSignatureStr+"%s\r\n",

	ADDMEV R3, R4                   // 7c8305d4
	ADDMEVCC R3, R4                 // 7c8305d5
	ADDCV R3, R4                    // 7c841c14
	ADDCVCC R3, R4                  // 7c841c15
	ADDZE R3, R4                    // 7c830194
	ADDZECC R3, R4                  // 7c830195
	ADDZEV R3, R4                   // 7c830594
	ADDZEVCC R3, R4                 // 7c830595
	SUBME R3, R4                    // 7c8301d0