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

using System;

using Org.BouncyCastle.Asn1;

namespace Org.BouncyCastle.Asn1.X509{
    public class AttributeCertificate
        : Asn1Encodable
    {
        private readonly AttributeCertificateInfo  acinfo;
        private readonly AlgorithmIdentifier    signatureAlgorithm;
        private readonly DerBitString        signatureValue;

    /**
         * @param obj
         * @return
         */
        public static AttributeCertificate GetInstance(
      object obj)
        {
            if (obj is AttributeCertificate)
            {
                return (AttributeCertificate) obj;
            }

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

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

    public AttributeCertificate(
            AttributeCertificateInfo  acinfo,
            AlgorithmIdentifier      signatureAlgorithm,
            DerBitString        signatureValue)
        {
            this.acinfo = acinfo;
            this.signatureAlgorithm = signatureAlgorithm;
            this.signatureValue = signatureValue;
        }

    private AttributeCertificate(
            Asn1Sequence seq)
        {
      if (seq.Count != 3)
        throw new ArgumentException("Bad sequence size: " + seq.Count);

      this.acinfo = AttributeCertificateInfo.GetInstance(seq[0]);
            this.signatureAlgorithm = AlgorithmIdentifier.GetInstance(seq[1]);
            this.signatureValue = DerBitString.GetInstance(seq[2]);
        }

    public AttributeCertificateInfo ACInfo
    {
      get { return acinfo; }
    }

    public AlgorithmIdentifier SignatureAlgorithm
    {
      get { return signatureAlgorithm; }
    }

    public DerBitString SignatureValue
    {
      get { return signatureValue; }
    }

    /**
         * Produce an object suitable for an Asn1OutputStream.
         * <pre>
         *  AttributeCertificate ::= Sequence {
         *       acinfo               AttributeCertificateInfo,
         *       signatureAlgorithm   AlgorithmIdentifier,
         *       signatureValue       BIT STRING
         *  }
         * </pre>
         */
        public override Asn1Object ToAsn1Object()
        {
      return new DerSequence(acinfo, signatureAlgorithm, signatureValue);
        }
    }
}