ChecksumSHA256
	// ChecksumSHA1 indicates a SHA-1 checksum.
	ChecksumSHA1
	// ChecksumCRC32 indicates a CRC32 checksum with IEEE table.
	ChecksumCRC32
	// ChecksumCRC32C indicates a CRC32 checksum with Castagnoli table.
	ChecksumCRC32C
	// ChecksumInvalid indicates an invalid checksum.
	ChecksumInvalid
	// ChecksumMultipart indicates the checksum is from a multipart upload.
	ChecksumMultipart

	ETag string

	// Size in bytes of the part.
	Size int64

	// Real size of the object uploaded by client.
	ActualSize int64

	// Checksum values
	ChecksumCRC32  string
	ChecksumCRC32C string
	ChecksumSHA1   string
	ChecksumSHA256 string
}

// CompletePart - represents the part that was completed, this is sent by the client
// during CompleteMultipartUpload request.

type Part struct {
	PartNumber   int
	LastModified string
	ETag         string
	Size         int64

	// Checksum values
	ChecksumCRC32  string `xml:"ChecksumCRC32,omitempty"`
	ChecksumCRC32C string `xml:"ChecksumCRC32C,omitempty"`
	ChecksumSHA1   string `xml:"ChecksumSHA1,omitempty"`
	ChecksumSHA256 string `xml:"ChecksumSHA256,omitempty"`
}

// ListPartsResponse - format for list parts response.

			if crc == "" {
				return oi, InvalidPart{
					PartNumber: part.PartNumber,
				}
			}
			wantCS := map[string]string{
				hash.ChecksumCRC32.String():  part.ChecksumCRC32,
				hash.ChecksumCRC32C.String(): part.ChecksumCRC32C,
				hash.ChecksumSHA1.String():   part.ChecksumSHA1,
				hash.ChecksumSHA256.String(): part.ChecksumSHA256,
			}
			if wantCS[checksumType.String()] != crc {
				return oi, InvalidPart{

			}
			parts[i] = CompletePart{
				ETag:           pi.ETag,
				PartNumber:     pi.PartNumber,
				ChecksumCRC32:  pi.ChecksumCRC32,
				ChecksumCRC32C: pi.ChecksumCRC32C,
				ChecksumSHA256: pi.ChecksumSHA256,
				ChecksumSHA1:   pi.ChecksumSHA1,
			}
		}
		_, err = z.CompleteMultipartUpload(ctx, bucket, objInfo.Name, res.UploadID, parts, ObjectOptions{