public ECMParams(CurveType curve, CoordinatesType coordinates, TorsionType torsion,
bool autoApprox, int curves, int B1, int B2)
{
this.curveType = curve;
this.coordinatesType = coordinates;
this.torsionType = torsion;
this.autoApproximation = autoApprox;
this.curves = curves;
this.B1 = B1;
this.B2 = B2;
}
}//inverted
public static BigInteger GetFactorExtended(BigInteger n, int B1, int B2, TorsionType type)
{
BigInteger x, y;
var E = GenerateCurve(n, out x, out y, type);
var P = new PointEdwardsExtended(x, y, E);
//STEP 1
var P1 = P as IPoint;
var result = StageOneEdwardsProjective(ref P1, n, B1);
if (result > 1 || result == 0)
{
return(result);
}
//STEP 2
result = StageTwoEdwardsProjective(ref P1, n, B1, B2);
return(result);
}//extended
public static BigInteger GetFactorProjective(BigInteger n, int B1, int B2, TorsionType type)
{
BigInteger x;
BigInteger y;
var E = GenerateCurve(n, out x, out y, type);
var P = new PointMontgomery(x, y, E);
//STEP 1
var P1 = P as IPoint;
var result = StageOneProjective(ref P1, n, B1);
if (result > 1 || result == 0)
{
return(result);
}
//STEP 2
result = StageTwoProjective2(ref P1, n, B1, B2);
return(result);
}//Montgomery
}//extended
private static EllipticCurveEdwards GenerateCurve(BigInteger n, out BigInteger x, out BigInteger y, TorsionType type)
{
switch (type)
{
case TorsionType.RandomCurve:
return(EllipticCurveEdwards.GenerateCurveRandom(n, out x, out y));
case TorsionType.Curve12:
return(EllipticCurveEdwards.GenerateCurve12(n, out x, out y));
case TorsionType.Curve2x8:
return(EllipticCurveEdwards.GenerateCurve2x8(n, out x, out y));
case TorsionType.Curve12FromFile:
return(EllipticCurveEdwards.GetCurve(n, out x, out y, "curve12.txt"));
case TorsionType.Curve2x8FromFile:
return(EllipticCurveEdwards.GetCurve(n, out x, out y, "curve2x8.txt"));
default:
return(EllipticCurveEdwards.GenerateCurveRandom(n, out x, out y));
}
}
}//Montgomery
private static EllipticCurveMontgomery GenerateCurve(BigInteger n, out BigInteger x, out BigInteger y, TorsionType type)
{
switch (type)
{
case TorsionType.RandomCurve:
return(EllipticCurveMontgomery.GenerateCurveRandom(n, out x, out y));
case TorsionType.Curve6:
return(EllipticCurveMontgomery.GenerateCurve6(n, out x, out y));
default:
return(EllipticCurveMontgomery.GenerateCurveRandom(n, out x, out y));
}
}