if err != nil {
				return
			}
			if sse, err = encrypt.NewSSEC(clientKey[:]); err != nil {
				return
			}
			opts.ServerSideEncryption = encrypt.SSECopy(sse)
			return
		}
		return
	}

	if crypto.SSEC.IsRequested(header) {
		clientKey, err = crypto.SSEC.ParseHTTP(header)
		if err != nil {
			return
		}
		if sse, err = encrypt.NewSSEC(clientKey[:]); err != nil {
			return
		}