OriginatorIdentifierOrKey.cs :  » PDF » iTextSharp » Org » BouncyCastle » Asn1 » Cms » C# / CSharp Open Source

using System;

using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.X509;

namespace Org.BouncyCastle.Asn1.Cms{
    public class OriginatorIdentifierOrKey
        : Asn1Encodable, IAsn1Choice
    {
        private Asn1Encodable id;

        public OriginatorIdentifierOrKey(
            IssuerAndSerialNumber id)
        {
            this.id = id;
        }

    [Obsolete("Use version taking a 'SubjectKeyIdentifier'")]
        public OriginatorIdentifierOrKey(
            Asn1OctetString id)
      : this(new SubjectKeyIdentifier(id))
        {
        }

        public OriginatorIdentifierOrKey(
            SubjectKeyIdentifier id)
        {
            this.id = new DerTaggedObject(false, 0, id);
        }

        public OriginatorIdentifierOrKey(
            OriginatorPublicKey id)
        {
            this.id = new DerTaggedObject(false, 1, id);
        }

    [Obsolete("Use more specific version")]
        public OriginatorIdentifierOrKey(
            Asn1Object id)
        {
            this.id = id;
        }

    private OriginatorIdentifierOrKey(
      Asn1TaggedObject id)
    {
      // TODO Add validation
      this.id = id;
    }

    /**
         * return an OriginatorIdentifierOrKey object from a tagged object.
         *
         * @param o the tagged object holding the object we want.
         * @param explicitly true if the object is meant to be explicitly
         *              tagged false otherwise.
         * @exception ArgumentException if the object held by the
         *          tagged object cannot be converted.
         */
        public static OriginatorIdentifierOrKey GetInstance(
            Asn1TaggedObject  o,
            bool        explicitly)
        {
            if (!explicitly)
            {
                throw new ArgumentException(
                        "Can't implicitly tag OriginatorIdentifierOrKey");
            }

      return GetInstance(o.GetObject());
        }

        /**
         * return an OriginatorIdentifierOrKey object from the given object.
         *
         * @param o the object we want converted.
         * @exception ArgumentException if the object cannot be converted.
         */
        public static OriginatorIdentifierOrKey GetInstance(
            object o)
        {
            if (o == null || o is OriginatorIdentifierOrKey)
            {
                return (OriginatorIdentifierOrKey)o;
            }

      if (o is IssuerAndSerialNumber)
      {
        return new OriginatorIdentifierOrKey((IssuerAndSerialNumber)o);
      }

      if (o is SubjectKeyIdentifier)
      {
        return new OriginatorIdentifierOrKey((SubjectKeyIdentifier)o);
      }

      if (o is OriginatorPublicKey)
      {
        return new OriginatorIdentifierOrKey((OriginatorPublicKey)o);
      }

      if (o is Asn1TaggedObject)
      {
        return new OriginatorIdentifierOrKey((Asn1TaggedObject)o);
      }

      throw new ArgumentException("Invalid OriginatorIdentifierOrKey: " + o.GetType().Name);
        }

    public Asn1Encodable ID
    {
      get { return id; }
    }

    public IssuerAndSerialNumber IssuerAndSerialNumber
    {
      get
      {
        if (id is IssuerAndSerialNumber)
        {
          return (IssuerAndSerialNumber)id;
        }

        return null;
      }
    }

    public SubjectKeyIdentifier SubjectKeyIdentifier
    {
      get
      {
        if (id is Asn1TaggedObject && ((Asn1TaggedObject)id).TagNo == 0)
        {
          return SubjectKeyIdentifier.GetInstance((Asn1TaggedObject)id, false);
        }

        return null;
      }
    }

    [Obsolete("Use 'OriginatorPublicKey' property")]
    public OriginatorPublicKey OriginatorKey
    {
      get { return OriginatorPublicKey; }
    }

    public OriginatorPublicKey OriginatorPublicKey
    {
      get
      {
        if (id is Asn1TaggedObject && ((Asn1TaggedObject)id).TagNo == 1)
        {
          return OriginatorPublicKey.GetInstance((Asn1TaggedObject)id, false);
        }

        return null;
      }
    }

    /**
         * Produce an object suitable for an Asn1OutputStream.
         * <pre>
         * OriginatorIdentifierOrKey ::= CHOICE {
         *     issuerAndSerialNumber IssuerAndSerialNumber,
         *     subjectKeyIdentifier [0] SubjectKeyIdentifier,
         *     originatorKey [1] OriginatorPublicKey
         * }
         *
         * SubjectKeyIdentifier ::= OCTET STRING
         * </pre>
         */
        public override Asn1Object ToAsn1Object()
        {
            return id.ToAsn1Object();
        }
    }
}