block, _ := pem.Decode([]byte(pemPrivateKey))

rsaPriv, err := x509.ParsePKCS1PrivateKey(block.Bytes)

if err != nil {

panic("Failed to parse private key: " + err.Error())

}

template := x509.Certificate{

SerialNumber: big.NewInt(1),

Subject: pkix.Name{

CommonName: "test",

Organization: []string{"Σ Acme Co"},

},

NotBefore: time.Unix(1000, 0),

NotAfter: time.Unix(100000, 0),

KeyUsage: x509.KeyUsageCertSign,

}

if _, err = x509.CreateCertificate(rand.Reader, &template, &template, &rsaPriv.PublicKey, rsaPriv); err != nil {

panic("failed to create certificate with basic imports: " + err.Error())

}