CustomWeierstrassCurve.cs

using System.Numerics;
 
namespace Waher.Security.EllipticCurves
{
    public class CustomWeierstrassCurve : WeierstrassCurve 
    {
        private readonly string curveName;
        private readonly HashFunctionArray hashFunction;
        private readonly HashFunctionStream hashFunctionStream;
 
        public CustomWeierstrassCurve(string CurveName, BigInteger Prime,
            PointOnCurve BasePoint, BigInteger a, BigInteger b, 
            BigInteger Order, int Cofactor, HashFunctionArray HashFunction,
            HashFunctionStream HashFunctionStream)
            : this(CurveName, Prime, BasePoint, a, b, Order, Cofactor, 
                  (byte[])null, HashFunction, HashFunctionStream)
        {
        }
 
        public CustomWeierstrassCurve(string CurveName, BigInteger Prime, 
            PointOnCurve BasePoint, BigInteger a, BigInteger b, 
            BigInteger Order, int Cofactor, byte[] Secret, HashFunctionArray HashFunction,
            HashFunctionStream HashFunctionStream)
            : base(Prime, BasePoint, a, b, Order, Cofactor, Secret)
        {
            this.curveName = CurveName;
            this.hashFunction = HashFunction;
            this.hashFunctionStream = HashFunctionStream;
        }
 
        public CustomWeierstrassCurve(string CurveName, BigInteger Prime, 
            PointOnCurve BasePoint, BigInteger a, BigInteger b, BigInteger Order, 
            int Cofactor, uint[] Secret, HashFunctionArray HashFunction,
            HashFunctionStream HashFunctionStream)
            : base(Prime, BasePoint, a, b, Order, Cofactor, Secret)
        {
            this.curveName = CurveName;
            this.hashFunction = HashFunction;
            this.hashFunctionStream = HashFunctionStream;
        }
 
        public CustomWeierstrassCurve(string CurveName, BigInteger Prime,
            PointOnCurve BasePoint, BigInteger a, BigInteger b,
            BigInteger Order, int Cofactor, HashFunction HashFunction)
            : this(CurveName, Prime, BasePoint, a, b, Order, Cofactor, (byte[])null, 
                  Hashes.GetHashFunctionArray(HashFunction),
                  Hashes.GetHashFunctionStream(HashFunction))
        {
        }
 
        public CustomWeierstrassCurve(string CurveName, BigInteger Prime,
            PointOnCurve BasePoint, BigInteger a, BigInteger b,
            BigInteger Order, int Cofactor, byte[] Secret, HashFunction HashFunction)
            : this(CurveName, Prime, BasePoint, a, b, Order, Cofactor, Secret,
                  Hashes.GetHashFunctionArray(HashFunction),
                  Hashes.GetHashFunctionStream(HashFunction))
        {
        }
 
        public CustomWeierstrassCurve(string CurveName, BigInteger Prime,
            PointOnCurve BasePoint, BigInteger a, BigInteger b, BigInteger Order,
            int Cofactor, uint[] Secret, HashFunction HashFunction)
            : this(CurveName, Prime, BasePoint, a, b, Order, Cofactor, Secret,
                  Hashes.GetHashFunctionArray(HashFunction),
                  Hashes.GetHashFunctionStream(HashFunction))
        {
        }
 
        public override string CurveName => this.curveName;
 
        public override HashFunctionArray HashFunction => this.hashFunction;
 
        public override HashFunctionStream HashFunctionStream => this.hashFunctionStream;
    }
}