Ejemplo n.º 1
0
        public EncriptionResult EncryptEncodedNumber(ECCPoint encodedNumber, ECCPoint openKey)
        {
            var seancePrivateKey = GeneratePrivateKey(GeneratorPoint.PointDimention);

            var left  = ECCPoint.Multiply(seancePrivateKey, GeneratorPoint);          //tip for decryption
            var right = encodedNumber + ECCPoint.Multiply(seancePrivateKey, openKey); //encrypted point

            return(new EncriptionResult(left, right));
        }
Ejemplo n.º 2
0
        public ECCKey GenerateKey()
        {
            var key = new ECCKey();

            key.PrivateKey = GeneratePrivateKey(GeneratorPoint.PointDimention);
            key.OpenKey    = ECCPoint.Multiply(key.PrivateKey, GeneratorPoint);

            key.P = GeneratorPoint.Curve.FieldModule;
            key.G = GeneratorPoint;

            return(key);
        }
Ejemplo n.º 3
0
        public ECCPoint CreatePoint()
        {
            Random random = new Random();
            var    bytes  = new byte[64];

            random.NextBytes(bytes);

            var privateKey = new mpz_t(bytes, 0) % GeneratorPoint.PointDimention;

            if (privateKey < 0)
            {
                privateKey = privateKey * -1;
            }
            return(ECCPoint.Multiply(privateKey, GeneratorPoint));
        }
Ejemplo n.º 4
0
        public static ECCPoint Double(ECCPoint point)
        {
            var pointX    = new mpz_t(point.X);
            var pointY    = new mpz_t(point.Y);
            var module    = new mpz_t(point.Curve.FieldModule);
            var curveAkof = new mpz_t(point.Curve.A);

            if (point == O)
            {
                return(O);
            }

            var dy = 3 * pointX * pointX + curveAkof;
            var dx = 2 * pointY;

            if (dx < 0)
            {
                dx += module;
            }
            if (dy < 0)
            {
                dy += module;
            }

            var dxInverse = dx.InvertMod(module);// BigInteger.ModPow(dx, curve.FieldModule - 2, curve.FieldModule);
            var m         = (dy * dxInverse) % module;

            var resultX = (m * m - pointX - pointX) % module;
            var resultY = (m * (pointX - resultX) - pointY) % module;

            if (resultX < 0)
            {
                resultX += module;
            }
            if (resultY < 0)
            {
                resultY += module;
            }

            return(point.Curve.GetPoint(resultX, resultY));
        }
Ejemplo n.º 5
0
        public static ECCPoint Multiply(mpz_t x, ECCPoint p)
        {
            ECCPoint temp = p;

            x = x - 1;
            while (x != 0)
            {
                if ((x % 2) != 0)
                {
                    if ((temp.X == p.X) || (temp.Y == p.Y))
                    {
                        temp = Double(temp);
                    }
                    else
                    {
                        temp = temp + p;
                    }
                    x = x - 1;
                }
                x = x / 2;
                p = Double(p);
            }
            return(temp);
        }
Ejemplo n.º 6
0
 public EncriptionResult(ECCPoint left, ECCPoint right)
 {
     Left  = left;
     Right = right;
 }