return nil, err
	}
	newReq := req
	newReq.Body = io.NopCloser(
		bytes.NewReader(bytes.Join([][]byte{newChunkHdr, newChunk[:len(newChunk)/2]},
			[]byte(""))),
	)
	return newReq, nil
}

// Malform data given a request signed using streaming signature V4.
func malformDataSigV4(req *http.Request, newByte byte) (*http.Request, error) {
	bufReader := bufio.NewReader(req.Body)