ElGamalParameters.cs :  » PDF » iTextSharp » Org » BouncyCastle » Crypto » Parameters » C# / CSharp Open Source

using System;

using Org.BouncyCastle.Math;

namespace Org.BouncyCastle.Crypto.Parameters{
    public class ElGamalParameters
    : ICipherParameters
    {
        private readonly BigInteger p, g;
    private readonly int l;

    public ElGamalParameters(
            BigInteger  p,
            BigInteger  g)
      : this(p, g, 0)
        {
        }

    public ElGamalParameters(
      BigInteger  p,
      BigInteger  g,
      int      l)
    {
      if (p == null)
        throw new ArgumentNullException("p");
      if (g == null)
        throw new ArgumentNullException("g");

      this.p = p;
      this.g = g;
      this.l = l;
    }

    public BigInteger P
        {
            get { return p; }
        }

    /**
        * return the generator - g
        */
        public BigInteger G
        {
            get { return g; }
        }

    /**
     * return private value limit - l
     */
    public int L
    {
      get { return l; }
    }

    public override bool Equals(
            object obj)
        {
      if (obj == this)
        return true;

      ElGamalParameters other = obj as ElGamalParameters;

      if (other == null)
        return false;

      return Equals(other);
        }

    protected bool Equals(
      ElGamalParameters other)
    {
      return p.Equals(other.p) && g.Equals(other.g) && l == other.l;
    }

    public override int GetHashCode()
        {
            return p.GetHashCode() ^ g.GetHashCode() ^ l;
        }
    }
}