val root =
      HeldCertificate.Builder()
        .serialNumber(1L)
        .certificateAuthority(1)
        .build()
    val certA =
      HeldCertificate.Builder()
        .serialNumber(2L)
        .certificateAuthority(0)
        .signedBy(root)
        .build()
    val certB =
      HeldCertificate.Builder()
        .serialNumber(3L)
        .signedBy(certA)
        .build()

    val rootCa =
      HeldCertificate.Builder()
        .serialNumber(1L)
        .certificateAuthority(1)
        .commonName("root")
        .build()
    val intermediateCa =
      HeldCertificate.Builder()
        .signedBy(rootCa)
        .certificateAuthority(0)
        .serialNumber(2L)
        .commonName("intermediate_ca")
        .build()
    val certificate =

		return nil, fmt.Errorf("unable to verify certificate request signature: %v", err)
	}

	serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
	if err != nil {
		return nil, fmt.Errorf("unable to generate a serial number for %s: %v", cr.Subject.CommonName, err)
	}

	tmpl := &x509.Certificate{
		SerialNumber:       serialNumber,
		Subject:            cr.Subject,
		DNSNames:           cr.DNSNames,

	}{
		{
			name: "valid",
			cert: &Certificate{
				SerialNumber: big.NewInt(1),
				DNSNames:     []string{"valid.testing.golang.invalid"},
				NotBefore:    now.Add(-time.Hour),
				NotAfter:     now.Add(time.Hour),
				ExtKeyUsage:  []ExtKeyUsage{ExtKeyUsageServerAuth},
			},
		},
		{
			name: "valid (with name)",
			cert: &Certificate{
				SerialNumber: big.NewInt(1),

			items: []SecretItem{
				{
					Name:        "olinger",
					Data:        "certdata",
					Source:      "source",
					Destination: "destination",
					SecretMeta: SecretMeta{
						Valid:        true,
						SerialNumber: "serial_number",
						NotAfter:     "expires",
						NotBefore:    "valid",
						Type:         "type",
					},
				},
			},
			expected: append(

    serverRootCa =
      HeldCertificate.Builder()
        .serialNumber(1L)
        .certificateAuthority(1)
        .commonName("root")
        .addSubjectAlternativeName("root_ca.com")
        .build()
    serverIntermediateCa =
      HeldCertificate.Builder()
        .signedBy(serverRootCa)
        .certificateAuthority(0)
        .serialNumber(2L)
        .commonName("intermediate_ca")

		return nil, fmt.Errorf("unable to verify certificate request signature: %v", err)
	}

	serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
	if err != nil {
		return nil, fmt.Errorf("unable to generate a serial number for %s: %v", cr.Subject.CommonName, err)
	}

	tmpl := &x509.Certificate{
		SerialNumber:       serialNumber,
		Subject:            cr.Subject,
		DNSNames:           cr.DNSNames,

	ret = n.appendRDNs(ret, n.OrganizationalUnit, oidOrganizationalUnit)
	if len(n.CommonName) > 0 {
		ret = n.appendRDNs(ret, []string{n.CommonName}, oidCommonName)
	}
	if len(n.SerialNumber) > 0 {
		ret = n.appendRDNs(ret, []string{n.SerialNumber}, oidSerialNumber)
	}
	for _, atv := range n.ExtraNames {
		ret = append(ret, []AttributeTypeAndValue{atv})
	}

	return ret
}

    fun serialNumber(serialNumber: BigInteger) =
      apply {
        this.serialNumber = serialNumber
      }

    /** Sets this certificate's serial number. If unset the serial number will be 1. */
    fun serialNumber(serialNumber: Long) =
      apply {
        serialNumber(BigInteger.valueOf(serialNumber))
      }

    /**

    val certA1 =
      HeldCertificate.Builder()
        .serialNumber(100L)
        .build()
    val certA1Sha256Pin = pin(certA1.certificate)
    val certB1 =
      HeldCertificate.Builder()
        .serialNumber(200L)
        .build()
    val certB1Sha256Pin = pin(certB1.certificate)
    val certC1 =
      HeldCertificate.Builder()
        .serialNumber(300L)
        .build()