return ChecksumCRC64NVME
	case "":
		if full != 0 {
			return ChecksumInvalid
		}
		return ChecksumNone
	}
	return ChecksumInvalid
}

// NewChecksumHeader returns a checksum type based on the algorithm string.
func NewChecksumHeader(h http.Header) ChecksumType {
	return NewChecksumType(h.Get(xhttp.AmzChecksumAlgo), h.Get(xhttp.AmzChecksumType))
}

// String returns the type as a string.

				writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
				return true
			}
			return checkPreconditionsPUT(ctx, w, r, oi, opts)
		}
	}

	checksumType := hash.NewChecksumHeader(r.Header)
	if checksumType.Is(hash.ChecksumInvalid) {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidChecksum), r.URL)
		return
	} else if checksumType.IsSet() && !checksumType.Is(hash.ChecksumTrailing) {