public static void Mul(uint[] x, uint[] y, uint[] zz) { Nat192.Mul(x, y, zz); Nat192.Mul(x, 6, y, 6, zz, 12); uint num = Nat192.AddToEachOther(zz, 6, zz, 12); uint cIn = num + Nat192.AddTo(zz, 0, zz, 6, 0u); num += Nat192.AddTo(zz, 18, zz, 12, cIn); uint[] array = Nat192.Create(); uint[] array2 = Nat192.Create(); bool flag = Nat192.Diff(x, 6, x, 0, array, 0) != Nat192.Diff(y, 6, y, 0, array2, 0); uint[] array3 = Nat192.CreateExt(); Nat192.Mul(array, array2, array3); num += (uint)(flag ? ((int)Nat.AddTo(12, array3, 0, zz, 6)) : Nat.SubFrom(12, array3, 0, zz, 6)); Nat.AddWordAt(24, num, zz, 18); }
public static void Mul(uint[] x, uint[] y, uint[] zz) { Nat192.Mul(x, y, zz); Nat192.Mul(x, 6, y, 6, zz, 12); uint c18 = Nat192.AddToEachOther(zz, 6, zz, 12); uint c12 = c18 + Nat192.AddTo(zz, 0, zz, 6, 0); c18 += Nat192.AddTo(zz, 18, zz, 12, c12); uint[] dx = Nat192.Create(), dy = Nat192.Create(); bool neg = Nat192.Diff(x, 6, x, 0, dx, 0) != Nat192.Diff(y, 6, y, 0, dy, 0); uint[] tt = Nat192.CreateExt(); Nat192.Mul(dx, dy, tt); c18 += neg ? Nat.AddTo(12, tt, 0, zz, 6) : (uint)Nat.SubFrom(12, tt, 0, zz, 6); Nat.AddWordAt(24, c18, zz, 18); }
public override ECPoint Add(ECPoint b) { if (this.IsInfinity) { return(b); } if (b.IsInfinity) { return(this); } if (this == b) { return(Twice()); } ECCurve curve = this.Curve; SecP192R1FieldElement X1 = (SecP192R1FieldElement)this.RawXCoord, Y1 = (SecP192R1FieldElement)this.RawYCoord; SecP192R1FieldElement X2 = (SecP192R1FieldElement)b.RawXCoord, Y2 = (SecP192R1FieldElement)b.RawYCoord; SecP192R1FieldElement Z1 = (SecP192R1FieldElement)this.RawZCoords[0]; SecP192R1FieldElement Z2 = (SecP192R1FieldElement)b.RawZCoords[0]; uint c; uint[] tt1 = Nat192.CreateExt(); uint[] t2 = Nat192.Create(); uint[] t3 = Nat192.Create(); uint[] t4 = Nat192.Create(); bool Z1IsOne = Z1.IsOne; uint[] U2, S2; if (Z1IsOne) { U2 = X2.x; S2 = Y2.x; } else { S2 = t3; SecP192R1Field.Square(Z1.x, S2); U2 = t2; SecP192R1Field.Multiply(S2, X2.x, U2); SecP192R1Field.Multiply(S2, Z1.x, S2); SecP192R1Field.Multiply(S2, Y2.x, S2); } bool Z2IsOne = Z2.IsOne; uint[] U1, S1; if (Z2IsOne) { U1 = X1.x; S1 = Y1.x; } else { S1 = t4; SecP192R1Field.Square(Z2.x, S1); U1 = tt1; SecP192R1Field.Multiply(S1, X1.x, U1); SecP192R1Field.Multiply(S1, Z2.x, S1); SecP192R1Field.Multiply(S1, Y1.x, S1); } uint[] H = Nat192.Create(); SecP192R1Field.Subtract(U1, U2, H); uint[] R = t2; SecP192R1Field.Subtract(S1, S2, R); // Check if b == this or b == -this if (Nat192.IsZero(H)) { if (Nat192.IsZero(R)) { // this == b, i.e. this must be doubled return(this.Twice()); } // this == -b, i.e. the result is the point at infinity return(curve.Infinity); } uint[] HSquared = t3; SecP192R1Field.Square(H, HSquared); uint[] G = Nat192.Create(); SecP192R1Field.Multiply(HSquared, H, G); uint[] V = t3; SecP192R1Field.Multiply(HSquared, U1, V); SecP192R1Field.Negate(G, G); Nat192.Mul(S1, G, tt1); c = Nat192.AddBothTo(V, V, G); SecP192R1Field.Reduce32(c, G); SecP192R1FieldElement X3 = new SecP192R1FieldElement(t4); SecP192R1Field.Square(R, X3.x); SecP192R1Field.Subtract(X3.x, G, X3.x); SecP192R1FieldElement Y3 = new SecP192R1FieldElement(G); SecP192R1Field.Subtract(V, X3.x, Y3.x); SecP192R1Field.MultiplyAddToExt(Y3.x, R, tt1); SecP192R1Field.Reduce(tt1, Y3.x); SecP192R1FieldElement Z3 = new SecP192R1FieldElement(H); if (!Z1IsOne) { SecP192R1Field.Multiply(Z3.x, Z1.x, Z3.x); } if (!Z2IsOne) { SecP192R1Field.Multiply(Z3.x, Z2.x, Z3.x); } ECFieldElement[] zs = new ECFieldElement[] { Z3 }; return(new SecP192R1Point(curve, X3, Y3, zs, IsCompressed)); }
public static void Multiply(uint[] x, uint[] y, uint[] z) { uint[] tt = Nat192.CreateExt(); Nat192.Mul(x, y, tt); Reduce(tt, z); }
public override ECPoint Add(ECPoint b) { if (base.IsInfinity) { return(b); } if (b.IsInfinity) { return(this); } if (this == b) { return(Twice()); } ECCurve curve = Curve; SecP192K1FieldElement secP192K1FieldElement = (SecP192K1FieldElement)base.RawXCoord; SecP192K1FieldElement secP192K1FieldElement2 = (SecP192K1FieldElement)base.RawYCoord; SecP192K1FieldElement secP192K1FieldElement3 = (SecP192K1FieldElement)b.RawXCoord; SecP192K1FieldElement secP192K1FieldElement4 = (SecP192K1FieldElement)b.RawYCoord; SecP192K1FieldElement secP192K1FieldElement5 = (SecP192K1FieldElement)base.RawZCoords[0]; SecP192K1FieldElement secP192K1FieldElement6 = (SecP192K1FieldElement)b.RawZCoords[0]; uint[] array = Nat192.CreateExt(); uint[] array2 = Nat192.Create(); uint[] array3 = Nat192.Create(); uint[] array4 = Nat192.Create(); bool isOne = secP192K1FieldElement5.IsOne; uint[] array5; uint[] array6; if (isOne) { array5 = secP192K1FieldElement3.x; array6 = secP192K1FieldElement4.x; } else { array6 = array3; SecP192K1Field.Square(secP192K1FieldElement5.x, array6); array5 = array2; SecP192K1Field.Multiply(array6, secP192K1FieldElement3.x, array5); SecP192K1Field.Multiply(array6, secP192K1FieldElement5.x, array6); SecP192K1Field.Multiply(array6, secP192K1FieldElement4.x, array6); } bool isOne2 = secP192K1FieldElement6.IsOne; uint[] array7; uint[] array8; if (isOne2) { array7 = secP192K1FieldElement.x; array8 = secP192K1FieldElement2.x; } else { array8 = array4; SecP192K1Field.Square(secP192K1FieldElement6.x, array8); array7 = array; SecP192K1Field.Multiply(array8, secP192K1FieldElement.x, array7); SecP192K1Field.Multiply(array8, secP192K1FieldElement6.x, array8); SecP192K1Field.Multiply(array8, secP192K1FieldElement2.x, array8); } uint[] array9 = Nat192.Create(); SecP192K1Field.Subtract(array7, array5, array9); uint[] array10 = array2; SecP192K1Field.Subtract(array8, array6, array10); if (Nat192.IsZero(array9)) { if (Nat192.IsZero(array10)) { return(Twice()); } return(curve.Infinity); } uint[] array11 = array3; SecP192K1Field.Square(array9, array11); uint[] array12 = Nat192.Create(); SecP192K1Field.Multiply(array11, array9, array12); uint[] array13 = array3; SecP192K1Field.Multiply(array11, array7, array13); SecP192K1Field.Negate(array12, array12); Nat192.Mul(array8, array12, array); uint x = Nat192.AddBothTo(array13, array13, array12); SecP192K1Field.Reduce32(x, array12); SecP192K1FieldElement secP192K1FieldElement7 = new SecP192K1FieldElement(array4); SecP192K1Field.Square(array10, secP192K1FieldElement7.x); SecP192K1Field.Subtract(secP192K1FieldElement7.x, array12, secP192K1FieldElement7.x); SecP192K1FieldElement secP192K1FieldElement8 = new SecP192K1FieldElement(array12); SecP192K1Field.Subtract(array13, secP192K1FieldElement7.x, secP192K1FieldElement8.x); SecP192K1Field.MultiplyAddToExt(secP192K1FieldElement8.x, array10, array); SecP192K1Field.Reduce(array, secP192K1FieldElement8.x); SecP192K1FieldElement secP192K1FieldElement9 = new SecP192K1FieldElement(array9); if (!isOne) { SecP192K1Field.Multiply(secP192K1FieldElement9.x, secP192K1FieldElement5.x, secP192K1FieldElement9.x); } if (!isOne2) { SecP192K1Field.Multiply(secP192K1FieldElement9.x, secP192K1FieldElement6.x, secP192K1FieldElement9.x); } ECFieldElement[] zs = new ECFieldElement[1] { secP192K1FieldElement9 }; return(new SecP192K1Point(curve, secP192K1FieldElement7, secP192K1FieldElement8, zs, base.IsCompressed)); }
public static void Multiply(uint[] x, uint[] y, uint[] z) { uint[] array = Nat192.CreateExt(); Nat192.Mul(x, y, array); Reduce(array, z); }