IDEACBCPar.cs :  » PDF » iTextSharp » Org » BouncyCastle » Asn1 » Misc » C# / CSharp Open Source

using System;

using Org.BouncyCastle.Asn1;

namespace Org.BouncyCastle.Asn1.Misc{
    public class IdeaCbcPar
        : Asn1Encodable
    {
        internal Asn1OctetString iv;

    public static IdeaCbcPar GetInstance(
            object o)
        {
            if (o is IdeaCbcPar)
            {
                return (IdeaCbcPar) o;
            }

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

      throw new ArgumentException("unknown object in IDEACBCPar factory");
        }

    public IdeaCbcPar(
            byte[] iv)
        {
            this.iv = new DerOctetString(iv);
        }

    private IdeaCbcPar(
            Asn1Sequence seq)
        {
      if (seq.Count == 1)
      {
        iv = (Asn1OctetString) seq[0];
      }
        }

    public byte[] GetIV()
        {
      return iv == null ? null : iv.GetOctets();
        }

    /**
         * Produce an object suitable for an Asn1OutputStream.
         * <pre>
         * IDEA-CBCPar ::= Sequence {
         *                      iv    OCTET STRING OPTIONAL -- exactly 8 octets
         *                  }
         * </pre>
         */
        public override Asn1Object ToAsn1Object()
        {
            Asn1EncodableVector v = new Asn1EncodableVector();

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

      return new DerSequence(v);
        }
    }
}