ChecksumTrailing ChecksumType = 1 << iota

	// ChecksumSHA256 indicates a SHA256 checksum.
	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

}

// Part container for part metadata.
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"`

		case "Size":
			z.Size, bts, err = msgp.ReadInt64Bytes(bts)
			if err != nil {
				err = msgp.WrapError(err, "Size")
				return
			}
		case "ChecksumCRC32":
			z.ChecksumCRC32, bts, err = msgp.ReadStringBytes(bts)
			if err != nil {
				err = msgp.WrapError(err, "ChecksumCRC32")
				return
			}
		case "ChecksumCRC32C":
			z.ChecksumCRC32C, bts, err = msgp.ReadStringBytes(bts)
			if err != nil {

		return nil
	}
	if !c.Valid() {
		return fmt.Errorf("invalid base checksum")
	}
	if !other.Valid() {
		return fmt.Errorf("invalid part checksum")
	}

	switch c.Type.Base() {
	case ChecksumCRC32:
		v := crc32Combine(crc32.IEEE, binary.BigEndian.Uint32(c.Raw), binary.BigEndian.Uint32(other.Raw), size)
		binary.BigEndian.PutUint32(c.Raw, v)
	case ChecksumCRC32C:

			crc := expPart.Checksums[checksumType.String()]
			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,

		}
		uploadedParts = append(uploadedParts, minio.CompletePart{
			PartNumber:        pInfo.PartNumber,
			ETag:              pInfo.ETag,
			ChecksumCRC32:     pInfo.ChecksumCRC32,
			ChecksumCRC32C:    pInfo.ChecksumCRC32C,
			ChecksumSHA1:      pInfo.ChecksumSHA1,
			ChecksumSHA256:    pInfo.ChecksumSHA256,
			ChecksumCRC64NVME: pInfo.ChecksumCRC64NVME,
		})
	}

		chkSums, _ := objInfo.decryptChecksums(0, r.Header)
		// AWS does not appear to append part number on this API call.
		if len(chkSums) > 0 {
			OA.Checksum = &objectAttributesChecksum{
				ChecksumCRC32:     strings.Split(chkSums["CRC32"], "-")[0],
				ChecksumCRC32C:    strings.Split(chkSums["CRC32C"], "-")[0],
				ChecksumSHA1:      strings.Split(chkSums["SHA1"], "-")[0],