private AuthorityKeyIdentifier GetAKI() { if (X509 == null) { throw new HFCACertificateException("Certificate is null"); } Asn1OctetString akiOc = X509.GetExtensionValue(X509Extensions.AuthorityKeyIdentifier); return(AuthorityKeyIdentifier.GetInstance(Asn1Sequence.GetInstance(akiOc.GetOctets()))); }