// When comparing certificates created at different times for equality, we do
// not want to worry about fields which are dependent on the time of creation.
// Thus we nullify these fields before comparing the certificates.
func nullifyTimeDependency(cert *x509.Certificate) *x509.Certificate {
cert.Raw = nil
cert.RawTBSCertificate = nil
cert.RawSubjectPublicKeyInfo = nil
cert.Signature = nil
cert.PublicKey = nil
cert.SerialNumber = nil
cert.NotBefore = time.Time{}
cert.NotAfter = time.Time{}
cert.Extensions = nil
cert.SubjectKeyId = nil
cert.AuthorityKeyId = nil
return cert
}