SigningCertificate.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 SigningCertificate
    : Asn1Encodable
  {
    private Asn1Sequence certs, policies;

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

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

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

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

      this.certs = Asn1Sequence.GetInstance(seq[0]);

      if (seq.Count > 1)
      {
        this.policies = Asn1Sequence.GetInstance(seq[1]);
      }
    }

    public SigningCertificate(
      EssCertID essCertID)
    {
      certs = new DerSequence(essCertID);
    }

    public EssCertID[] GetCerts()
    {
      EssCertID[] cs = new EssCertID[certs.Count];

      for (int i = 0; i != certs.Count; i++)
      {
        cs[i] = EssCertID.GetInstance(certs[i]);
      }

      return cs;
    }

    public PolicyInformation[] GetPolicies()
    {
      if (policies == null)
      {
        return null;
      }

      PolicyInformation[] ps = new PolicyInformation[policies.Count];

      for (int i = 0; i != policies.Count; i++)
      {
        ps[i] = PolicyInformation.GetInstance(policies[i]);
      }

      return ps;
    }

    /**
     * The definition of SigningCertificate is
     * <pre>
     * SigningCertificate ::=  SEQUENCE {
     *      certs        SEQUENCE OF EssCertID,
     *      policies     SEQUENCE OF PolicyInformation OPTIONAL
     * }
     * </pre>
     * id-aa-signingCertificate OBJECT IDENTIFIER ::= { iso(1)
     *  member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9)
     *  smime(16) id-aa(2) 12 }
     */
    public override Asn1Object ToAsn1Object()
    {
      Asn1EncodableVector v = new Asn1EncodableVector(certs);

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

      return new DerSequence(v);
    }
  }
}