public virtual bool Equals(SecP256R1FieldElement other) { if (this == other) { return(true); } if (other == null) { return(false); } return(Nat256.Eq(x, other.x)); }
public override ECPoint Add(ECPoint b) { if (base.IsInfinity) { return(b); } if (b.IsInfinity) { return(this); } if (this == b) { return(Twice()); } ECCurve curve = Curve; SecP256R1FieldElement secP256R1FieldElement = (SecP256R1FieldElement)base.RawXCoord; SecP256R1FieldElement secP256R1FieldElement2 = (SecP256R1FieldElement)base.RawYCoord; SecP256R1FieldElement secP256R1FieldElement3 = (SecP256R1FieldElement)b.RawXCoord; SecP256R1FieldElement secP256R1FieldElement4 = (SecP256R1FieldElement)b.RawYCoord; SecP256R1FieldElement secP256R1FieldElement5 = (SecP256R1FieldElement)base.RawZCoords[0]; SecP256R1FieldElement secP256R1FieldElement6 = (SecP256R1FieldElement)b.RawZCoords[0]; uint[] array = Nat256.CreateExt(); uint[] array2 = Nat256.Create(); uint[] array3 = Nat256.Create(); uint[] array4 = Nat256.Create(); bool isOne = secP256R1FieldElement5.IsOne; uint[] array5; uint[] array6; if (isOne) { array5 = secP256R1FieldElement3.x; array6 = secP256R1FieldElement4.x; } else { array6 = array3; SecP256R1Field.Square(secP256R1FieldElement5.x, array6); array5 = array2; SecP256R1Field.Multiply(array6, secP256R1FieldElement3.x, array5); SecP256R1Field.Multiply(array6, secP256R1FieldElement5.x, array6); SecP256R1Field.Multiply(array6, secP256R1FieldElement4.x, array6); } bool isOne2 = secP256R1FieldElement6.IsOne; uint[] array7; uint[] array8; if (isOne2) { array7 = secP256R1FieldElement.x; array8 = secP256R1FieldElement2.x; } else { array8 = array4; SecP256R1Field.Square(secP256R1FieldElement6.x, array8); array7 = array; SecP256R1Field.Multiply(array8, secP256R1FieldElement.x, array7); SecP256R1Field.Multiply(array8, secP256R1FieldElement6.x, array8); SecP256R1Field.Multiply(array8, secP256R1FieldElement2.x, array8); } uint[] array9 = Nat256.Create(); SecP256R1Field.Subtract(array7, array5, array9); uint[] array10 = array2; SecP256R1Field.Subtract(array8, array6, array10); if (Nat256.IsZero(array9)) { if (Nat256.IsZero(array10)) { return(Twice()); } return(curve.Infinity); } uint[] array11 = array3; SecP256R1Field.Square(array9, array11); uint[] array12 = Nat256.Create(); SecP256R1Field.Multiply(array11, array9, array12); uint[] array13 = array3; SecP256R1Field.Multiply(array11, array7, array13); SecP256R1Field.Negate(array12, array12); Nat256.Mul(array8, array12, array); uint x = Nat256.AddBothTo(array13, array13, array12); SecP256R1Field.Reduce32(x, array12); SecP256R1FieldElement secP256R1FieldElement7 = new SecP256R1FieldElement(array4); SecP256R1Field.Square(array10, secP256R1FieldElement7.x); SecP256R1Field.Subtract(secP256R1FieldElement7.x, array12, secP256R1FieldElement7.x); SecP256R1FieldElement secP256R1FieldElement8 = new SecP256R1FieldElement(array12); SecP256R1Field.Subtract(array13, secP256R1FieldElement7.x, secP256R1FieldElement8.x); SecP256R1Field.MultiplyAddToExt(secP256R1FieldElement8.x, array10, array); SecP256R1Field.Reduce(array, secP256R1FieldElement8.x); SecP256R1FieldElement secP256R1FieldElement9 = new SecP256R1FieldElement(array9); if (!isOne) { SecP256R1Field.Multiply(secP256R1FieldElement9.x, secP256R1FieldElement5.x, secP256R1FieldElement9.x); } if (!isOne2) { SecP256R1Field.Multiply(secP256R1FieldElement9.x, secP256R1FieldElement6.x, secP256R1FieldElement9.x); } ECFieldElement[] zs = new ECFieldElement[1] { secP256R1FieldElement9 }; return(new SecP256R1Point(curve, secP256R1FieldElement7, secP256R1FieldElement8, zs, base.IsCompressed)); }
public override ECPoint Twice() { if (base.IsInfinity) { return(this); } ECCurve curve = Curve; SecP256R1FieldElement secP256R1FieldElement = (SecP256R1FieldElement)base.RawYCoord; if (secP256R1FieldElement.IsZero) { return(curve.Infinity); } SecP256R1FieldElement secP256R1FieldElement2 = (SecP256R1FieldElement)base.RawXCoord; SecP256R1FieldElement secP256R1FieldElement3 = (SecP256R1FieldElement)base.RawZCoords[0]; uint[] array = Nat256.Create(); uint[] array2 = Nat256.Create(); uint[] array3 = Nat256.Create(); SecP256R1Field.Square(secP256R1FieldElement.x, array3); uint[] array4 = Nat256.Create(); SecP256R1Field.Square(array3, array4); bool isOne = secP256R1FieldElement3.IsOne; uint[] array5 = secP256R1FieldElement3.x; if (!isOne) { array5 = array2; SecP256R1Field.Square(secP256R1FieldElement3.x, array5); } SecP256R1Field.Subtract(secP256R1FieldElement2.x, array5, array); uint[] array6 = array2; SecP256R1Field.Add(secP256R1FieldElement2.x, array5, array6); SecP256R1Field.Multiply(array6, array, array6); uint x = Nat256.AddBothTo(array6, array6, array6); SecP256R1Field.Reduce32(x, array6); uint[] array7 = array3; SecP256R1Field.Multiply(array3, secP256R1FieldElement2.x, array7); x = Nat.ShiftUpBits(8, array7, 2, 0u); SecP256R1Field.Reduce32(x, array7); x = Nat.ShiftUpBits(8, array4, 3, 0u, array); SecP256R1Field.Reduce32(x, array); SecP256R1FieldElement secP256R1FieldElement4 = new SecP256R1FieldElement(array4); SecP256R1Field.Square(array6, secP256R1FieldElement4.x); SecP256R1Field.Subtract(secP256R1FieldElement4.x, array7, secP256R1FieldElement4.x); SecP256R1Field.Subtract(secP256R1FieldElement4.x, array7, secP256R1FieldElement4.x); SecP256R1FieldElement secP256R1FieldElement5 = new SecP256R1FieldElement(array7); SecP256R1Field.Subtract(array7, secP256R1FieldElement4.x, secP256R1FieldElement5.x); SecP256R1Field.Multiply(secP256R1FieldElement5.x, array6, secP256R1FieldElement5.x); SecP256R1Field.Subtract(secP256R1FieldElement5.x, array, secP256R1FieldElement5.x); SecP256R1FieldElement secP256R1FieldElement6 = new SecP256R1FieldElement(array6); SecP256R1Field.Twice(secP256R1FieldElement.x, secP256R1FieldElement6.x); if (!isOne) { SecP256R1Field.Multiply(secP256R1FieldElement6.x, secP256R1FieldElement3.x, secP256R1FieldElement6.x); } return(new SecP256R1Point(curve, secP256R1FieldElement4, secP256R1FieldElement5, new ECFieldElement[1] { secP256R1FieldElement6 }, base.IsCompressed)); }