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

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C# / CSharp Open Source » PDF » iTextSharp 
iTextSharp » Org » BouncyCastle » Asn1 » Cms » KEKIdentifier.cs
using System;

using Org.BouncyCastle.Asn1;

namespace Org.BouncyCastle.Asn1.Cms{
    public class KekIdentifier
        : Asn1Encodable
    {
        private Asn1OctetString    keyIdentifier;
        private DerGeneralizedTime  date;
        private OtherKeyAttribute  other;

    public KekIdentifier(
            byte[]              keyIdentifier,
            DerGeneralizedTime  date,
            OtherKeyAttribute   other)
        {
            this.keyIdentifier = new DerOctetString(keyIdentifier);
            this.date = date;
            this.other = other;
        }

    public KekIdentifier(
            Asn1Sequence seq)
        {
            keyIdentifier = (Asn1OctetString) seq[0];

      switch (seq.Count)
            {
            case 1:
        break;
            case 2:
        if (seq[1] is DerGeneralizedTime)
        {
          date = (DerGeneralizedTime) seq[1];
        }
        else
        {
          other = OtherKeyAttribute.GetInstance(seq[2]);
        }
        break;
            case 3:
        date  = (DerGeneralizedTime) seq[1];
        other = OtherKeyAttribute.GetInstance(seq[2]);
        break;
            default:
        throw new ArgumentException("Invalid KekIdentifier");
            }
        }

    /**
         * return a KekIdentifier object from a tagged object.
         *
         * @param obj 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 KekIdentifier GetInstance(
            Asn1TaggedObject obj,
            bool explicitly)
        {
            return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
        }

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

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

            throw new ArgumentException("Invalid KekIdentifier: " + obj.GetType().Name);
        }

    public Asn1OctetString KeyIdentifier
    {
      get { return keyIdentifier; }
    }

    public DerGeneralizedTime Date
    {
      get { return date; }
    }

    public OtherKeyAttribute Other
    {
      get { return other; }
    }

    /**
         * Produce an object suitable for an Asn1OutputStream.
         * <pre>
         * KekIdentifier ::= Sequence {
         *     keyIdentifier OCTET STRING,
         *     date GeneralizedTime OPTIONAL,
         *     other OtherKeyAttribute OPTIONAL
         * }
         * </pre>
         */
        public override Asn1Object ToAsn1Object()
        {
            Asn1EncodableVector v = new Asn1EncodableVector(keyIdentifier);

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

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

      return new DerSequence(v);
        }
    }
}

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