type CertificateList struct {
	TBSCertList        TBSCertificateList
	SignatureAlgorithm AlgorithmIdentifier
	SignatureValue     asn1.BitString
}

// HasExpired reports whether certList should have been updated by now.
func (certList *CertificateList) HasExpired(now time.Time) bool {
	return !now.Before(certList.TBSCertList.NextUpdate)
}