using Org.BouncyCastle.Math.Raw; namespace Org.BouncyCastle.Math.EC.Custom.Sec { internal class SecP160R2Point : AbstractFpPoint { internal SecP160R2Point(ECCurve curve, ECFieldElement x, ECFieldElement y) : base(curve, x, y) { } internal SecP160R2Point(ECCurve curve, ECFieldElement x, ECFieldElement y, ECFieldElement[] zs) : base(curve, x, y, zs) { } protected override ECPoint Detach() { return new SecP160R2Point(null, AffineXCoord, AffineYCoord); } public override ECPoint Add(ECPoint b) { if (base.IsInfinity) return b; if (b.IsInfinity) return this; if (this == b) return Twice(); ECCurve curve = Curve; SecP160R2FieldElement secP160R2FieldElement = (SecP160R2FieldElement)base.RawXCoord; SecP160R2FieldElement secP160R2FieldElement2 = (SecP160R2FieldElement)base.RawYCoord; SecP160R2FieldElement secP160R2FieldElement3 = (SecP160R2FieldElement)b.RawXCoord; SecP160R2FieldElement secP160R2FieldElement4 = (SecP160R2FieldElement)b.RawYCoord; SecP160R2FieldElement secP160R2FieldElement5 = (SecP160R2FieldElement)base.RawZCoords[0]; SecP160R2FieldElement secP160R2FieldElement6 = (SecP160R2FieldElement)b.RawZCoords[0]; uint[] array = Nat160.CreateExt(); uint[] array2 = Nat160.Create(); uint[] array3 = Nat160.Create(); uint[] array4 = Nat160.Create(); bool isOne = secP160R2FieldElement5.IsOne; uint[] array5; uint[] array6; if (isOne) { array5 = secP160R2FieldElement3.x; array6 = secP160R2FieldElement4.x; } else { array6 = array3; SecP160R2Field.Square(secP160R2FieldElement5.x, array6); array5 = array2; SecP160R2Field.Multiply(array6, secP160R2FieldElement3.x, array5); SecP160R2Field.Multiply(array6, secP160R2FieldElement5.x, array6); SecP160R2Field.Multiply(array6, secP160R2FieldElement4.x, array6); } bool isOne2 = secP160R2FieldElement6.IsOne; uint[] array7; uint[] array8; if (isOne2) { array7 = secP160R2FieldElement.x; array8 = secP160R2FieldElement2.x; } else { array8 = array4; SecP160R2Field.Square(secP160R2FieldElement6.x, array8); array7 = array; SecP160R2Field.Multiply(array8, secP160R2FieldElement.x, array7); SecP160R2Field.Multiply(array8, secP160R2FieldElement6.x, array8); SecP160R2Field.Multiply(array8, secP160R2FieldElement2.x, array8); } uint[] array9 = Nat160.Create(); SecP160R2Field.Subtract(array7, array5, array9); uint[] array10 = array2; SecP160R2Field.Subtract(array8, array6, array10); if (Nat160.IsZero(array9)) { if (Nat160.IsZero(array10)) return Twice(); return curve.Infinity; } uint[] array11 = array3; SecP160R2Field.Square(array9, array11); uint[] array12 = Nat160.Create(); SecP160R2Field.Multiply(array11, array9, array12); uint[] array13 = array3; SecP160R2Field.Multiply(array11, array7, array13); SecP160R2Field.Negate(array12, array12); Nat160.Mul(array8, array12, array); SecP160R2Field.Reduce32(Nat160.AddBothTo(array13, array13, array12), array12); SecP160R2FieldElement secP160R2FieldElement7 = new SecP160R2FieldElement(array4); SecP160R2Field.Square(array10, secP160R2FieldElement7.x); SecP160R2Field.Subtract(secP160R2FieldElement7.x, array12, secP160R2FieldElement7.x); SecP160R2FieldElement secP160R2FieldElement8 = new SecP160R2FieldElement(array12); SecP160R2Field.Subtract(array13, secP160R2FieldElement7.x, secP160R2FieldElement8.x); SecP160R2Field.MultiplyAddToExt(secP160R2FieldElement8.x, array10, array); SecP160R2Field.Reduce(array, secP160R2FieldElement8.x); SecP160R2FieldElement secP160R2FieldElement9 = new SecP160R2FieldElement(array9); if (!isOne) SecP160R2Field.Multiply(secP160R2FieldElement9.x, secP160R2FieldElement5.x, secP160R2FieldElement9.x); if (!isOne2) SecP160R2Field.Multiply(secP160R2FieldElement9.x, secP160R2FieldElement6.x, secP160R2FieldElement9.x); ECFieldElement[] zs = new ECFieldElement[1] { secP160R2FieldElement9 }; return new SecP160R2Point(curve, secP160R2FieldElement7, secP160R2FieldElement8, zs); } public override ECPoint Twice() { if (base.IsInfinity) return this; ECCurve curve = Curve; SecP160R2FieldElement secP160R2FieldElement = (SecP160R2FieldElement)base.RawYCoord; if (secP160R2FieldElement.IsZero) return curve.Infinity; SecP160R2FieldElement secP160R2FieldElement2 = (SecP160R2FieldElement)base.RawXCoord; SecP160R2FieldElement secP160R2FieldElement3 = (SecP160R2FieldElement)base.RawZCoords[0]; uint[] array = Nat160.Create(); uint[] array2 = Nat160.Create(); uint[] array3 = Nat160.Create(); SecP160R2Field.Square(secP160R2FieldElement.x, array3); uint[] array4 = Nat160.Create(); SecP160R2Field.Square(array3, array4); bool isOne = secP160R2FieldElement3.IsOne; uint[] array5 = secP160R2FieldElement3.x; if (!isOne) { array5 = array2; SecP160R2Field.Square(secP160R2FieldElement3.x, array5); } SecP160R2Field.Subtract(secP160R2FieldElement2.x, array5, array); uint[] array6 = array2; SecP160R2Field.Add(secP160R2FieldElement2.x, array5, array6); SecP160R2Field.Multiply(array6, array, array6); SecP160R2Field.Reduce32(Nat160.AddBothTo(array6, array6, array6), array6); uint[] array7 = array3; SecP160R2Field.Multiply(array3, secP160R2FieldElement2.x, array7); SecP160R2Field.Reduce32(Nat.ShiftUpBits(5, array7, 2, 0), array7); SecP160R2Field.Reduce32(Nat.ShiftUpBits(5, array4, 3, 0, array), array); SecP160R2FieldElement secP160R2FieldElement4 = new SecP160R2FieldElement(array4); SecP160R2Field.Square(array6, secP160R2FieldElement4.x); SecP160R2Field.Subtract(secP160R2FieldElement4.x, array7, secP160R2FieldElement4.x); SecP160R2Field.Subtract(secP160R2FieldElement4.x, array7, secP160R2FieldElement4.x); SecP160R2FieldElement secP160R2FieldElement5 = new SecP160R2FieldElement(array7); SecP160R2Field.Subtract(array7, secP160R2FieldElement4.x, secP160R2FieldElement5.x); SecP160R2Field.Multiply(secP160R2FieldElement5.x, array6, secP160R2FieldElement5.x); SecP160R2Field.Subtract(secP160R2FieldElement5.x, array, secP160R2FieldElement5.x); SecP160R2FieldElement secP160R2FieldElement6 = new SecP160R2FieldElement(array6); SecP160R2Field.Twice(secP160R2FieldElement.x, secP160R2FieldElement6.x); if (!isOne) SecP160R2Field.Multiply(secP160R2FieldElement6.x, secP160R2FieldElement3.x, secP160R2FieldElement6.x); return new SecP160R2Point(curve, secP160R2FieldElement4, secP160R2FieldElement5, new ECFieldElement[1] { secP160R2FieldElement6 }); } public override ECPoint TwicePlus(ECPoint b) { if (this == b) return ThreeTimes(); if (base.IsInfinity) return b; if (b.IsInfinity) return Twice(); if (base.RawYCoord.IsZero) return b; return Twice().Add(b); } public override ECPoint ThreeTimes() { if (base.IsInfinity || base.RawYCoord.IsZero) return this; return Twice().Add(this); } public override ECPoint Negate() { if (base.IsInfinity) return this; return new SecP160R2Point(Curve, base.RawXCoord, base.RawYCoord.Negate(), base.RawZCoords); } } }