)

// metadataEncrypter returns a function that will read data from input,
// encrypt it using the provided key and return the result.
// 0 sized inputs are passed through.
func metadataEncrypter(key crypto.ObjectKey) objectMetaEncryptFn {
	return func(baseKey string, data []byte) []byte {
		if len(data) == 0 {
			return data
		}
		var buffer bytes.Buffer