public override ECPoint Twice() { if (base.IsInfinity) { return(this); } ECCurve curve = Curve; SecP224K1FieldElement secP224K1FieldElement = (SecP224K1FieldElement)base.RawYCoord; if (secP224K1FieldElement.IsZero) { return(curve.Infinity); } SecP224K1FieldElement secP224K1FieldElement2 = (SecP224K1FieldElement)base.RawXCoord; SecP224K1FieldElement secP224K1FieldElement3 = (SecP224K1FieldElement)base.RawZCoords[0]; uint[] array = Nat224.Create(); SecP224K1Field.Square(secP224K1FieldElement.x, array); uint[] array2 = Nat224.Create(); SecP224K1Field.Square(array, array2); uint[] array3 = Nat224.Create(); SecP224K1Field.Square(secP224K1FieldElement2.x, array3); uint x = Nat224.AddBothTo(array3, array3, array3); SecP224K1Field.Reduce32(x, array3); uint[] array4 = array; SecP224K1Field.Multiply(array, secP224K1FieldElement2.x, array4); x = Nat.ShiftUpBits(7, array4, 2, 0u); SecP224K1Field.Reduce32(x, array4); uint[] array5 = Nat224.Create(); x = Nat.ShiftUpBits(7, array2, 3, 0u, array5); SecP224K1Field.Reduce32(x, array5); SecP224K1FieldElement secP224K1FieldElement4 = new SecP224K1FieldElement(array2); SecP224K1Field.Square(array3, secP224K1FieldElement4.x); SecP224K1Field.Subtract(secP224K1FieldElement4.x, array4, secP224K1FieldElement4.x); SecP224K1Field.Subtract(secP224K1FieldElement4.x, array4, secP224K1FieldElement4.x); SecP224K1FieldElement secP224K1FieldElement5 = new SecP224K1FieldElement(array4); SecP224K1Field.Subtract(array4, secP224K1FieldElement4.x, secP224K1FieldElement5.x); SecP224K1Field.Multiply(secP224K1FieldElement5.x, array3, secP224K1FieldElement5.x); SecP224K1Field.Subtract(secP224K1FieldElement5.x, array5, secP224K1FieldElement5.x); SecP224K1FieldElement secP224K1FieldElement6 = new SecP224K1FieldElement(array3); SecP224K1Field.Twice(secP224K1FieldElement.x, secP224K1FieldElement6.x); if (!secP224K1FieldElement3.IsOne) { SecP224K1Field.Multiply(secP224K1FieldElement6.x, secP224K1FieldElement3.x, secP224K1FieldElement6.x); } return(new SecP224K1Point(curve, secP224K1FieldElement4, secP224K1FieldElement5, new ECFieldElement[1] { secP224K1FieldElement6 }, base.IsCompressed)); }
public override ECPoint Twice() { if (base.IsInfinity) { return(this); } ECCurve curve = this.Curve; SecP224K1FieldElement rawYCoord = (SecP224K1FieldElement)base.RawYCoord; if (rawYCoord.IsZero) { return(curve.Infinity); } SecP224K1FieldElement rawXCoord = (SecP224K1FieldElement)base.RawXCoord; SecP224K1FieldElement element3 = (SecP224K1FieldElement)base.RawZCoords[0]; uint[] z = Nat224.Create(); SecP224K1Field.Square(rawYCoord.x, z); uint[] numArray2 = Nat224.Create(); SecP224K1Field.Square(z, numArray2); uint[] numArray3 = Nat224.Create(); SecP224K1Field.Square(rawXCoord.x, numArray3); SecP224K1Field.Reduce32(Nat224.AddBothTo(numArray3, numArray3, numArray3), numArray3); uint[] numArray4 = z; SecP224K1Field.Multiply(z, rawXCoord.x, numArray4); SecP224K1Field.Reduce32(Nat.ShiftUpBits(7, numArray4, 2, 0), numArray4); uint[] numArray5 = Nat224.Create(); SecP224K1Field.Reduce32(Nat.ShiftUpBits(7, numArray2, 3, 0, numArray5), numArray5); SecP224K1FieldElement x = new SecP224K1FieldElement(numArray2); SecP224K1Field.Square(numArray3, x.x); SecP224K1Field.Subtract(x.x, numArray4, x.x); SecP224K1Field.Subtract(x.x, numArray4, x.x); SecP224K1FieldElement y = new SecP224K1FieldElement(numArray4); SecP224K1Field.Subtract(numArray4, x.x, y.x); SecP224K1Field.Multiply(y.x, numArray3, y.x); SecP224K1Field.Subtract(y.x, numArray5, y.x); SecP224K1FieldElement element6 = new SecP224K1FieldElement(numArray3); SecP224K1Field.Twice(rawYCoord.x, element6.x); if (!element3.IsOne) { SecP224K1Field.Multiply(element6.x, element3.x, element6.x); } return(new SecP224K1Point(curve, x, y, new ECFieldElement[] { element6 }, base.IsCompressed)); }
public override ECPoint Twice() { if (this.IsInfinity) { return(this); } ECCurve curve = this.Curve; SecP224K1FieldElement Y1 = (SecP224K1FieldElement)this.RawYCoord; if (Y1.IsZero) { return(curve.Infinity); } SecP224K1FieldElement X1 = (SecP224K1FieldElement)this.RawXCoord, Z1 = (SecP224K1FieldElement)this.RawZCoords[0]; uint c; uint[] Y1Squared = Nat224.Create(); SecP224K1Field.Square(Y1.x, Y1Squared); uint[] T = Nat224.Create(); SecP224K1Field.Square(Y1Squared, T); uint[] M = Nat224.Create(); SecP224K1Field.Square(X1.x, M); c = Nat224.AddBothTo(M, M, M); SecP224K1Field.Reduce32(c, M); uint[] S = Y1Squared; SecP224K1Field.Multiply(Y1Squared, X1.x, S); c = Nat.ShiftUpBits(7, S, 2, 0); SecP224K1Field.Reduce32(c, S); uint[] t1 = Nat224.Create(); c = Nat.ShiftUpBits(7, T, 3, 0, t1); SecP224K1Field.Reduce32(c, t1); SecP224K1FieldElement X3 = new SecP224K1FieldElement(T); SecP224K1Field.Square(M, X3.x); SecP224K1Field.Subtract(X3.x, S, X3.x); SecP224K1Field.Subtract(X3.x, S, X3.x); SecP224K1FieldElement Y3 = new SecP224K1FieldElement(S); SecP224K1Field.Subtract(S, X3.x, Y3.x); SecP224K1Field.Multiply(Y3.x, M, Y3.x); SecP224K1Field.Subtract(Y3.x, t1, Y3.x); SecP224K1FieldElement Z3 = new SecP224K1FieldElement(M); SecP224K1Field.Twice(Y1.x, Z3.x); if (!Z1.IsOne) { SecP224K1Field.Multiply(Z3.x, Z1.x, Z3.x); } return(new SecP224K1Point(curve, X3, Y3, new ECFieldElement[] { Z3 }, IsCompressed)); }