PBEParameter.cs :  » PDF » iTextSharp » Org » BouncyCastle » Asn1 » Pkcs » C# / CSharp Open Source

using System;
using System.Collections;

using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Math;

namespace Org.BouncyCastle.Asn1.Pkcs{
    public class PbeParameter
    : Asn1Encodable
    {
        private readonly Asn1OctetString octStr;
        private readonly DerInteger iterationCount;

    public static PbeParameter GetInstance(
            object obj)
        {
            if (obj is PbeParameter || obj == null)
            {
                return (PbeParameter) obj;
            }

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

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

    private PbeParameter(
      Asn1Sequence seq)
        {
      if (seq.Count != 2)
        throw new ArgumentException("Wrong number of elements in sequence", "seq");

      octStr = Asn1OctetString.GetInstance(seq[0]);
            iterationCount = DerInteger.GetInstance(seq[1]);
        }

    public PbeParameter(
            byte[]  salt,
            int    iterationCount)
        {
            this.octStr = new DerOctetString(salt);
            this.iterationCount = new DerInteger(iterationCount);
        }

    public byte[] GetSalt()
        {
            return octStr.GetOctets();
        }

    public BigInteger IterationCount
    {
      get { return iterationCount.Value; }
    }

    public override Asn1Object ToAsn1Object()
        {
      return new DerSequence(octStr, iterationCount);
        }
    }
}