if err != nil {
			if errors.Is(err, kes.ErrKeyNotFound) {
				writeErrorResponse(ctx, w, toAPIError(ctx, errKMSKeyNotFound), r.URL)
				return
			}
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}
	}

	configData, err := xml.Marshal(encConfig)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}