Example #1
0
        public void CheckCertificate(
            int id,
            byte[]  cert)
        {
            Asn1Object seq  = Asn1Object.FromByteArray(cert);
            string     dump = Asn1Dump.DumpAsString(seq);

            X509CertificateStructure obj     = X509CertificateStructure.GetInstance(seq);
            TbsCertificateStructure  tbsCert = obj.TbsCertificate;

            if (!tbsCert.Subject.ToString().Equals(subjects[id - 1]))
            {
                Fail("failed subject test for certificate id " + id
                     + " got " + tbsCert.Subject.ToString());
            }

            if (tbsCert.Version >= 3)
            {
                X509Extensions ext = tbsCert.Extensions;
                if (ext != null)
                {
                    foreach (DerObjectIdentifier oid in ext.ExtensionOids)
                    {
                        X509Extension extVal = ext.GetExtension(oid);
                        Asn1Object    extObj = Asn1Object.FromByteArray(extVal.Value.GetOctets());

                        if (oid.Equals(X509Extensions.SubjectKeyIdentifier))
                        {
                            SubjectKeyIdentifier.GetInstance(extObj);
                        }
                        else if (oid.Equals(X509Extensions.KeyUsage))
                        {
                            KeyUsage.GetInstance(extObj);
                        }
                        else if (oid.Equals(X509Extensions.ExtendedKeyUsage))
                        {
                            ExtendedKeyUsage ku = ExtendedKeyUsage.GetInstance(extObj);

                            Asn1Sequence sq = (Asn1Sequence)ku.ToAsn1Object();
                            for (int i = 0; i != sq.Count; i++)
                            {
                                KeyPurposeID.GetInstance(sq[i]);
                            }
                        }
                        else if (oid.Equals(X509Extensions.SubjectAlternativeName))
                        {
                            GeneralNames gn = GeneralNames.GetInstance(extObj);

                            Asn1Sequence sq = (Asn1Sequence)gn.ToAsn1Object();
                            for (int i = 0; i != sq.Count; i++)
                            {
                                GeneralName.GetInstance(sq[i]);
                            }
                        }
                        else if (oid.Equals(X509Extensions.IssuerAlternativeName))
                        {
                            GeneralNames gn = GeneralNames.GetInstance(extObj);

                            Asn1Sequence sq = (Asn1Sequence)gn.ToAsn1Object();
                            for (int i = 0; i != sq.Count; i++)
                            {
                                GeneralName.GetInstance(sq[i]);
                            }
                        }
                        else if (oid.Equals(X509Extensions.CrlDistributionPoints))
                        {
                            CrlDistPoint p = CrlDistPoint.GetInstance(extObj);

                            DistributionPoint[] points = p.GetDistributionPoints();
                            for (int i = 0; i != points.Length; i++)
                            {
                                // do nothing
                            }
                        }
                        else if (oid.Equals(X509Extensions.CertificatePolicies))
                        {
                            Asn1Sequence cp = (Asn1Sequence)extObj;

                            for (int i = 0; i != cp.Count; i++)
                            {
                                PolicyInformation.GetInstance(cp[i]);
                            }
                        }
                        else if (oid.Equals(X509Extensions.AuthorityKeyIdentifier))
                        {
                            AuthorityKeyIdentifier.GetInstance(extObj);
                        }
                        else if (oid.Equals(X509Extensions.BasicConstraints))
                        {
                            BasicConstraints.GetInstance(extObj);
                        }
                        else
                        {
                            //Console.WriteLine(oid.Id);
                        }
                    }
                }
            }
        }