// a chunk with a chunk size = 0. However, this chunk still has a signature and we must
// verify it.
const maxChunkSize = 16 << 20 // 16 MiB

// Read - implements `io.Reader`, which transparently decodes
// the incoming AWS Signature V4 streaming signature.
func (cr *s3ChunkedReader) Read(buf []byte) (n int, err error) {
	if cr.err != nil {
		if cr.debug {