n, err := base64DecodeBytes(token[:i], buf)
	if err != nil {
		return nil, &jwtgo.ValidationError{Inner: err, Errors: jwtgo.ValidationErrorMalformed}
	}
	headerDec := buf[:n]
	buf = buf[n:]

	alg, _, _, err := jsonparser.Get(headerDec, "alg")
	if err != nil {
		return nil, &jwtgo.ValidationError{Inner: err, Errors: jwtgo.ValidationErrorMalformed}
	}

	n, err = base64DecodeBytes(token[i+1:j], buf)

	export      = flag.Bool("export", false, "export xl.meta")
	djson       = flag.Bool("djson", false, "expect djson format for xl.meta")
	genkey      = flag.Bool("genkey", false, "generate key pair")
)

func main() {
	flag.Parse()

	if *genkey {
		generateKeys()
		os.Exit(0)
	}
	var privateKey []byte
	if *keyHex == "" {
		if b, err := os.ReadFile(*privKeyPath); err == nil {
			privateKey = b