func mustMakeRoot(t *testing.T, cn string) string {
	pub, priv, err := ed25519.GenerateKey(rand.Reader)
	if err != nil {
		t.Fatalf("Error while generating key: %v", err)
	}

	template := &x509.Certificate{
		SerialNumber: big.NewInt(0),
		Subject: pkix.Name{
			CommonName: cn,
		},
		IsCA:                  true,
		BasicConstraintsValid: true,
	}

	var serialBytes [16]byte
	rand.Read(serialBytes[:])

	template := &Certificate{
		SerialNumber: new(big.Int).SetBytes(serialBytes[:]),
		Subject: pkix.Name{
			CommonName: name,
		},
		NotBefore:             time.Unix(1000, 0),
		NotAfter:              time.Unix(2000, 0),

	notAfter := notBefore.Add(validFor)

	serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
	serialNumber, err := crand.Int(crand.Reader, serialNumberLimit)
	if err != nil {
		return nil, nil, fmt.Errorf("failed to generate serial number: %w", err)
	}

	template := x509.Certificate{
		SerialNumber: serialNumber,
		Subject: pkix.Name{
			Organization: []string{"Acme Co"},
		},
		NotBefore: notBefore,

	TBSCertificate     TBSCertificate
	SignatureAlgorithm AlgorithmIdentifier
	SignatureValue     BitString
}

type TBSCertificate struct {
	Version            int `asn1:"optional,explicit,default:0,tag:0"`
	SerialNumber       RawValue
	SignatureAlgorithm AlgorithmIdentifier
	Issuer             RDNSequence
	Validity           Validity
	Subject            RDNSequence
	PublicKey          PublicKeyInfo
}

	}
	keyDER, err := x509.MarshalPKCS8PrivateKey(key)
	if err != nil {
		t.Fatal(err)
	}
	keyPEM := pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY", Bytes: keyDER})
	tmpl := &x509.Certificate{
		SerialNumber: big.NewInt(1),
		Subject:      pkix.Name{CommonName: "test"},
	}
	certDER, err := x509.CreateCertificate(rand.Reader, tmpl, tmpl, key.Public(), key)
	if err != nil {
		t.Fatal(err)
	}

pkg crypto/x509, type RevocationListEntry struct, ReasonCode int #53573
pkg crypto/x509, type RevocationListEntry struct, RevocationTime time.Time #53573
pkg crypto/x509, type RevocationListEntry struct, SerialNumber *big.Int #53573
pkg crypto/x509, type RevocationList struct, RevokedCertificateEntries []RevocationListEntry #53573
pkg crypto/x509, type RevocationList struct, RevokedCertificates //deprecated #53573

	pub, priv, err := ed25519.GenerateKey(rand.Reader)
	if err != nil {
		t.Fatalf("Error while generating key: %v", err)
	}

	template := &x509.Certificate{
		SerialNumber: big.NewInt(0),
		Subject: pkix.Name{
			CommonName: cn,
		},
		IsCA:                  true,
		BasicConstraintsValid: true,
	}

		},
		{
			name: "nil serial",
			cert: func() *x509.Certificate {
				c := getCert(t, clientCNCert)
				c.SerialNumber = nil
				return c
			}(),
			expectedIdentifier: "SN=<nil>, SKID=FB:77:D6:D0:84:A8:10:DF:FA:4E:A4:E0:F1:2A:BB:B4:80:FD:4F:3F, AKID=D3:07:CD:72:E6:BE:0A:5A:D8:E9:60:20:AF:C2:F2:36:7E:33:62:0B",
		},
		{

		certName := e.hintCert.Subject.CommonName
		if len(certName) == 0 {
			if len(e.hintCert.Subject.Organization) > 0 {
				certName = e.hintCert.Subject.Organization[0]
			} else {
				certName = "serial:" + e.hintCert.SerialNumber.String()
			}
		}
		s += fmt.Sprintf(" (possibly because of %q while trying to verify candidate authority certificate %q)", e.hintErr, certName)
	}
	return s
}

	OutDiscards     uint32
	OutErrors       uint32
	OutQLen         uint32
	DescrLen        uint32
	Descr           [MAXLEN_IFDESCR]byte
}

type CertInfo struct {
	Version              uint32
	SerialNumber         CryptIntegerBlob
	SignatureAlgorithm   CryptAlgorithmIdentifier
	Issuer               CertNameBlob
	NotBefore            Filetime
	NotAfter             Filetime
	Subject              CertNameBlob