ESSCertID.cs :  » PDF » iTextSharp » Org » BouncyCastle » Asn1 » Ess » C# / CSharp Open Source

using System;

using Org.BouncyCastle.Asn1.X509;

namespace Org.BouncyCastle.Asn1.Ess{
  public class EssCertID
    : Asn1Encodable
  {
    private Asn1OctetString certHash;
    private IssuerSerial issuerSerial;

    public static EssCertID GetInstance(
      object o)
    {
      if (o == null || o is EssCertID)
      {
        return (EssCertID) o;
      }

      if (o is Asn1Sequence)
      {
        return new EssCertID((Asn1Sequence) o);
      }

      throw new ArgumentException(
        "unknown object in 'EssCertID' factory : "
        + o.GetType().Name + ".");
    }

    /**
     * constructor
     */
    public EssCertID(
      Asn1Sequence seq)
    {
      if (seq.Count < 1 || seq.Count > 2)
      {
        throw new ArgumentException("Bad sequence size: " + seq.Count);
      }

      this.certHash = Asn1OctetString.GetInstance(seq[0]);

      if (seq.Count > 1)
      {
        issuerSerial = IssuerSerial.GetInstance(seq[1]);
      }
    }

    public EssCertID(
      byte[] hash)
    {
      certHash = new DerOctetString(hash);
    }

    public EssCertID(
      byte[]      hash,
      IssuerSerial  issuerSerial)
    {
      this.certHash = new DerOctetString(hash);
      this.issuerSerial = issuerSerial;
    }

    public byte[] GetCertHash()
    {
      return certHash.GetOctets();
    }

    public IssuerSerial IssuerSerial
    {
      get { return issuerSerial; }
    }

    /**
     * <pre>
     * EssCertID ::= SEQUENCE {
     *     certHash Hash,
     *     issuerSerial IssuerSerial OPTIONAL }
     * </pre>
     */
    public override Asn1Object ToAsn1Object()
    {
      Asn1EncodableVector v = new Asn1EncodableVector(certHash);

      if (issuerSerial != null)
      {
        v.Add(issuerSerial);
      }

      return new DerSequence(v);
    }
  }
}