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

using System;

using Org.BouncyCastle.Math;
using Org.BouncyCastle.Math.EC;
using Org.BouncyCastle.Utilities;

namespace Org.BouncyCastle.Crypto.Parameters{
    public class ECDomainParameters
    {
        internal ECCurve     curve;
        internal byte[]      seed;
        internal ECPoint     g;
        internal BigInteger  n;
        internal BigInteger  h;

    public ECDomainParameters(
            ECCurve     curve,
            ECPoint     g,
            BigInteger  n)
      : this(curve, g, n, BigInteger.One)
        {
        }

        public ECDomainParameters(
            ECCurve     curve,
            ECPoint     g,
            BigInteger  n,
            BigInteger  h)
      : this(curve, g, n, h, null)
    {
        }

    public ECDomainParameters(
            ECCurve     curve,
            ECPoint     g,
            BigInteger  n,
            BigInteger  h,
            byte[]      seed)
        {
      if (curve == null)
        throw new ArgumentNullException("curve");
      if (g == null)
        throw new ArgumentNullException("g");
      if (n == null)
        throw new ArgumentNullException("n");
      if (h == null)
        throw new ArgumentNullException("h");

      this.curve = curve;
            this.g = g;
            this.n = n;
            this.h = h;
            this.seed = Arrays.Clone(seed);
        }

    public ECCurve Curve
        {
            get { return curve; }
        }

        public ECPoint G
        {
            get { return g; }
        }

        public BigInteger N
        {
            get { return n; }
        }

        public BigInteger H
        {
            get { return h; }
        }

        public byte[] GetSeed()
        {
      return Arrays.Clone(seed);
        }

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

      ECDomainParameters other = obj as ECDomainParameters;

      if (other == null)
        return false;

      return Equals(other);
        }

    protected bool Equals(
      ECDomainParameters other)
    {
      return curve.Equals(other.curve)
        &&  g.Equals(other.g)
        &&  n.Equals(other.n)
        &&  h.Equals(other.h)
        &&  Arrays.AreEqual(seed, other.seed);
    }

    public override int GetHashCode()
        {
            return curve.GetHashCode()
        ^  g.GetHashCode()
        ^  n.GetHashCode()
        ^  h.GetHashCode()
        ^  Arrays.GetHashCode(seed);
        }
    }

}