Org.BouncyCastle.Asn1.X509.TbsCertificateStructure.TbsCertificateStructure C# (CSharp) Method

		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(seq[0]);
			}
			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;
				}
			}
		}