OtherInfo.cs :  » PDF » iTextSharp » Org » BouncyCastle » Asn1 » X9 » C# / CSharp Open Source

using System.Collections;

namespace Org.BouncyCastle.Asn1.X9{
    /**
     * ANS.1 def for Diffie-Hellman key exchange OtherInfo structure. See
     * RFC 2631, or X9.42, for further details.
     */
    public class OtherInfo
        : Asn1Encodable
    {
        private KeySpecificInfo  keyInfo;
        private Asn1OctetString  partyAInfo;
        private Asn1OctetString  suppPubInfo;

    public OtherInfo(
            KeySpecificInfo  keyInfo,
            Asn1OctetString  partyAInfo,
            Asn1OctetString  suppPubInfo)
        {
            this.keyInfo = keyInfo;
            this.partyAInfo = partyAInfo;
            this.suppPubInfo = suppPubInfo;
        }

    public OtherInfo(
            Asn1Sequence seq)
        {
            IEnumerator e = seq.GetEnumerator();

      e.MoveNext();
            keyInfo = new KeySpecificInfo((Asn1Sequence) e.Current);

      while (e.MoveNext())
            {
                DerTaggedObject o = (DerTaggedObject) e.Current;

        if (o.TagNo == 0)
                {
                    partyAInfo = (Asn1OctetString) o.GetObject();
                }
                else if ((int) o.TagNo == 2)
                {
                    suppPubInfo = (Asn1OctetString) o.GetObject();
                }
            }
        }

    public KeySpecificInfo KeyInfo
        {
      get { return keyInfo; }
        }

    public Asn1OctetString PartyAInfo
        {
      get { return partyAInfo; }
        }

    public Asn1OctetString SuppPubInfo
        {
            get { return suppPubInfo; }
        }

    /**
         * Produce an object suitable for an Asn1OutputStream.
         * <pre>
         *  OtherInfo ::= Sequence {
         *      keyInfo KeySpecificInfo,
         *      partyAInfo [0] OCTET STRING OPTIONAL,
         *      suppPubInfo [2] OCTET STRING
         *  }
         * </pre>
         */
        public override Asn1Object ToAsn1Object()
        {
            Asn1EncodableVector v = new Asn1EncodableVector(keyInfo);

      if (partyAInfo != null)
            {
                v.Add(new DerTaggedObject(0, partyAInfo));
            }

      v.Add(new DerTaggedObject(2, suppPubInfo));

      return new DerSequence(v);
        }
    }
}