Org.BouncyCastle.Asn1.X509.X509Extensions.GetInstance C# (CSharp) Method

		public static X509Extensions GetInstance(
            Asn1TaggedObject	obj,
            bool				explicitly)
        {
            return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
        }

        internal TbsCertificateStructure(
            Asn1Sequence seq)
        {
            int seqStart = 0;

            this.seq = seq;

            //
            // some certficates don't include a version number - we assume v1
            //
            if (seq[0] is DerTaggedObject)
            {
                version = DerInteger.GetInstance((Asn1TaggedObject)seq[0], true);
            }
            else
            {
                seqStart = -1;                          // field 0 is missing!
                version  = new DerInteger(0);
            }

            serialNumber = DerInteger.GetInstance(seq[seqStart + 1]);

            signature = AlgorithmIdentifier.GetInstance(seq[seqStart + 2]);
            issuer    = X509Name.GetInstance(seq[seqStart + 3]);

            //
            // before and after dates
            //
            Asn1Sequence dates = (Asn1Sequence)seq[seqStart + 4];

            startDate = Time.GetInstance(dates[0]);
            endDate   = Time.GetInstance(dates[1]);

            subject = X509Name.GetInstance(seq[seqStart + 5]);

            //
            // public key info.
            //
            subjectPublicKeyInfo = SubjectPublicKeyInfo.GetInstance(seq[seqStart + 6]);

            for (int extras = seq.Count - (seqStart + 6) - 1; extras > 0; extras--)
            {
                DerTaggedObject extra = (DerTaggedObject)seq[seqStart + 6 + extras];

                switch (extra.TagNo)
                {
                case 1:
                    issuerUniqueID = DerBitString.GetInstance(extra, false);
                    break;

                case 2:
                    subjectUniqueID = DerBitString.GetInstance(extra, false);
                    break;

                case 3:
                    extensions = X509Extensions.GetInstance(extra);
                    break;
                }
            }
        }