PKCS12PBEParams.cs :  » PDF » iTextSharp » Org » BouncyCastle » Asn1 » Pkcs » C# / CSharp Open Source

using System;

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

namespace Org.BouncyCastle.Asn1.Pkcs{
    public class Pkcs12PbeParams
        : Asn1Encodable
    {
        private readonly DerInteger iterations;
        private readonly Asn1OctetString iv;

    public Pkcs12PbeParams(
            byte[]  salt,
            int    iterations)
        {
            this.iv = new DerOctetString(salt);
            this.iterations = new DerInteger(iterations);
        }

    private Pkcs12PbeParams(
            Asn1Sequence seq)
        {
      if (seq.Count != 2)
        throw new ArgumentException("Wrong number of elements in sequence", "seq");

      iv = Asn1OctetString.GetInstance(seq[0]);
            iterations = DerInteger.GetInstance(seq[1]);
        }

    public static Pkcs12PbeParams GetInstance(
            object obj)
        {
            if (obj is Pkcs12PbeParams)
            {
                return (Pkcs12PbeParams) obj;
            }

      if (obj is Asn1Sequence)
            {
                return new Pkcs12PbeParams((Asn1Sequence) obj);
            }

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

    public BigInteger Iterations
    {
      get { return iterations.Value; }
    }

    public byte[] GetIV()
        {
            return iv.GetOctets();
        }

    public override Asn1Object ToAsn1Object()
        {
      return new DerSequence(iv, iterations);
        }
    }
}