func tryDecryptETag(key []byte, encryptedETag string, sses3 bool) string {
	// ETag for SSE-C or SSE-KMS encrypted objects need not be content MD5Sum.While encrypted
	// md5sum is stored internally, return just the last 32 bytes of hex-encoded and
	// encrypted md5sum string for SSE-C
	if !sses3 {
		return encryptedETag[len(encryptedETag)-32:]
	}
	var objectKey crypto.ObjectKey
	copy(objectKey[:], key)