if len(*curves) != 0 {
		for _, curveStr := range *curves {
			id, err := strconv.Atoi(curveStr)
			if err != nil {
				log.Fatalf("failed to parse curve id %q: %s", curveStr, err)
			}
			cfg.CurvePreferences = append(cfg.CurvePreferences, CurveID(id))
		}
	}

	for i := 0; i < *resumeCount+1; i++ {
		if i > 0 && (*onResumeECHConfigListB64 != "") {
			echConfigList, err := base64.StdEncoding.DecodeString(*onResumeECHConfigListB64)