if !disableMD5 {
			if _, ok := src.(etag.Tagger); !ok {
				src = etag.NewReader(ctx, r, MD5, forceMD5)
			} else {
				src = etag.Wrap(r, src)
			}
		} else {
			src = r
		}
	} else if _, ok := src.(etag.Tagger); !ok {
		if !disableMD5 {
			src = etag.NewReader(ctx, src, MD5, forceMD5)
		}
	}
	var h hash.Hash
	if len(SHA256) != 0 {
		h = sha256.New()
	}
	return &Reader{

		sha256hex = ""
	}

	var forceMD5 []byte
	// Optimization: If SSE-KMS and SSE-C did not request Content-Md5. Use uuid as etag. Optionally enable this also
	// for server that is started with `--no-compat`.
	if !etag.ContentMD5Requested(r.Header) && (crypto.S3KMS.IsEncrypted(mi.UserDefined) || crypto.SSEC.IsRequested(r.Header) || !globalServerCtxt.StrictS3Compat) {
		forceMD5 = mustGetUUIDBytes()
	}