X509CertificateStructure.cs :  » PDF » iTextSharp » Org » BouncyCastle » Asn1 » X509 » C# / CSharp Open Source

using System;

using Org.BouncyCastle.Asn1.Pkcs;

namespace Org.BouncyCastle.Asn1.X509{
    /**
     * an X509Certificate structure.
     * <pre>
     *  Certificate ::= Sequence {
     *      tbsCertificate          TbsCertificate,
     *      signatureAlgorithm      AlgorithmIdentifier,
     *      signature               BIT STRING
     *  }
     * </pre>
     */
    public class X509CertificateStructure
        : Asn1Encodable
    {
        private readonly TbsCertificateStructure  tbsCert;
        private readonly AlgorithmIdentifier    sigAlgID;
        private readonly DerBitString        sig;

    public static X509CertificateStructure GetInstance(
            Asn1TaggedObject  obj,
            bool        explicitly)
        {
            return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
        }

    public static X509CertificateStructure GetInstance(
            object obj)
        {
            if (obj is X509CertificateStructure)
            {
                return (X509CertificateStructure) obj;
            }

      if (obj is Asn1Sequence)
            {
                return new X509CertificateStructure((Asn1Sequence) obj);
            }

      throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
        }

    public X509CertificateStructure(
      TbsCertificateStructure  tbsCert,
      AlgorithmIdentifier    sigAlgID,
      DerBitString      sig)
    {
      if (tbsCert == null)
        throw new ArgumentNullException("tbsCert");
      if (sigAlgID == null)
        throw new ArgumentNullException("sigAlgID");
      if (sig == null)
        throw new ArgumentNullException("sig");

      this.tbsCert = tbsCert;
      this.sigAlgID = sigAlgID;
      this.sig = sig;
    }

    private X509CertificateStructure(
            Asn1Sequence seq)
        {
      if (seq.Count != 3)
        throw new ArgumentException("sequence wrong size for a certificate", "seq");

      //
            // correct x509 certficate
            //
      tbsCert = TbsCertificateStructure.GetInstance(seq[0]);
      sigAlgID = AlgorithmIdentifier.GetInstance(seq[1]);
      sig = DerBitString.GetInstance(seq[2]);
        }

    public TbsCertificateStructure TbsCertificate
        {
      get { return tbsCert; }
        }

    public int Version
        {
            get { return tbsCert.Version; }
        }

    public DerInteger SerialNumber
        {
            get { return tbsCert.SerialNumber; }
        }

    public X509Name Issuer
        {
            get { return tbsCert.Issuer; }
        }

    public Time StartDate
        {
            get { return tbsCert.StartDate; }
        }

    public Time EndDate
        {
            get { return tbsCert.EndDate; }
        }

    public X509Name Subject
        {
            get { return tbsCert.Subject; }
        }

    public SubjectPublicKeyInfo SubjectPublicKeyInfo
        {
            get { return tbsCert.SubjectPublicKeyInfo; }
        }

    public AlgorithmIdentifier SignatureAlgorithm
        {
            get { return sigAlgID; }
        }

    public DerBitString Signature
        {
            get { return sig; }
        }

    public override Asn1Object ToAsn1Object()
        {
      return new DerSequence(tbsCert, sigAlgID, sig);
        }
  }
}