return -1
		}
		return c
	}, v)
	parts := strings.Split(v, ":")
	v = parts[len(parts)-1]
	res, err := hex.DecodeString(v)
	if err != nil {
		panic(err)
	}
	return res
}

func TestDeriveSecret(t *testing.T) {
	chTranscript := cipherSuitesTLS13[0].hash.New()
	chTranscript.Write(parseVector(`
	payload (512 octets):  01 00 01 fc 03 03 1b c3 ce b6 bb e3 9c ff