// reader
func DecryptBlocksRequestR(inputReader io.Reader, h http.Header, seqNumber uint32, partStart int, oi ObjectInfo, copySource bool) (io.Reader, error) {
	bucket, object := oi.Bucket, oi.Name
	// Single part case
	if !oi.isMultipart() {
		var reader io.Reader
		var err error
		if copySource {
			reader, err = DecryptCopyRequestR(inputReader, h, bucket, object, seqNumber, oi.UserDefined)
		} else {