public override ECPoint Twice()
{
if (base.IsInfinity)
{
return(this);
}
ECCurve curve = Curve;
ECFieldElement rawXCoord = base.RawXCoord;
if (!rawXCoord.IsZero)
{
switch (curve.CoordinateSystem)
{
case 0:
{
ECFieldElement rawYCoord2 = base.RawYCoord;
ECFieldElement eCFieldElement11 = rawYCoord2.Divide(rawXCoord).Add(rawXCoord);
ECFieldElement x = eCFieldElement11.Square().Add(eCFieldElement11).Add(curve.A);
ECFieldElement y = rawXCoord.SquarePlusProduct(x, eCFieldElement11.AddOne());
return(new F2mPoint(curve, x, y, base.IsCompressed));
}
case 1:
{
ECFieldElement rawYCoord3 = base.RawYCoord;
ECFieldElement eCFieldElement12 = base.RawZCoords[0];
bool isOne2 = eCFieldElement12.IsOne;
ECFieldElement eCFieldElement13 = (!isOne2) ? rawXCoord.Multiply(eCFieldElement12) : rawXCoord;
ECFieldElement b3 = (!isOne2) ? rawYCoord3.Multiply(eCFieldElement12) : rawYCoord3;
ECFieldElement eCFieldElement14 = rawXCoord.Square();
ECFieldElement eCFieldElement15 = eCFieldElement14.Add(b3);
ECFieldElement eCFieldElement16 = eCFieldElement13;
ECFieldElement eCFieldElement17 = eCFieldElement16.Square();
ECFieldElement eCFieldElement18 = eCFieldElement15.Add(eCFieldElement16);
ECFieldElement eCFieldElement19 = eCFieldElement18.MultiplyPlusProduct(eCFieldElement15, eCFieldElement17, curve.A);
ECFieldElement x2 = eCFieldElement16.Multiply(eCFieldElement19);
ECFieldElement y2 = eCFieldElement14.Square().MultiplyPlusProduct(eCFieldElement16, eCFieldElement19, eCFieldElement18);
ECFieldElement eCFieldElement20 = eCFieldElement16.Multiply(eCFieldElement17);
return(new F2mPoint(curve, x2, y2, new ECFieldElement[1]
{
eCFieldElement20
}, base.IsCompressed));
}
case 6:
{
ECFieldElement rawYCoord = base.RawYCoord;
ECFieldElement eCFieldElement = base.RawZCoords[0];
bool isOne = eCFieldElement.IsOne;
ECFieldElement eCFieldElement2 = (!isOne) ? rawYCoord.Multiply(eCFieldElement) : rawYCoord;
ECFieldElement eCFieldElement3 = (!isOne) ? eCFieldElement.Square() : eCFieldElement;
ECFieldElement a = curve.A;
ECFieldElement eCFieldElement4 = (!isOne) ? a.Multiply(eCFieldElement3) : a;
ECFieldElement eCFieldElement5 = rawYCoord.Square().Add(eCFieldElement2).Add(eCFieldElement4);
if (eCFieldElement5.IsZero)
{
return(new F2mPoint(curve, eCFieldElement5, curve.B.Sqrt(), base.IsCompressed));
}
ECFieldElement eCFieldElement6 = eCFieldElement5.Square();
ECFieldElement eCFieldElement7 = (!isOne) ? eCFieldElement5.Multiply(eCFieldElement3) : eCFieldElement5;
ECFieldElement b = curve.B;
ECFieldElement eCFieldElement9;
if (b.BitLength < curve.FieldSize >> 1)
{
ECFieldElement eCFieldElement8 = rawYCoord.Add(rawXCoord).Square();
ECFieldElement b2 = (!b.IsOne) ? eCFieldElement4.SquarePlusProduct(b, eCFieldElement3.Square()) : eCFieldElement4.Add(eCFieldElement3).Square();
eCFieldElement9 = eCFieldElement8.Add(eCFieldElement5).Add(eCFieldElement3).Multiply(eCFieldElement8)
.Add(b2)
.Add(eCFieldElement6);
if (a.IsZero)
{
eCFieldElement9 = eCFieldElement9.Add(eCFieldElement7);
}
else if (!a.IsOne)
{
eCFieldElement9 = eCFieldElement9.Add(a.AddOne().Multiply(eCFieldElement7));
}
}
else
{
ECFieldElement eCFieldElement10 = (!isOne) ? rawXCoord.Multiply(eCFieldElement) : rawXCoord;
eCFieldElement9 = eCFieldElement10.SquarePlusProduct(eCFieldElement5, eCFieldElement2).Add(eCFieldElement6).Add(eCFieldElement7);
}
return(new F2mPoint(curve, eCFieldElement6, eCFieldElement9, new ECFieldElement[1]
{
eCFieldElement7
}, base.IsCompressed));
}
default:
throw new InvalidOperationException("unsupported coordinate system");
}
}
return(curve.Infinity);
}
protected override bool SatisfiesCurveEquation()
{
//IL_0167: Unknown result type (might be due to invalid IL or missing references)
ECCurve curve = Curve;
ECFieldElement rawXCoord = base.RawXCoord;
ECFieldElement rawYCoord = base.RawYCoord;
ECFieldElement eCFieldElement = curve.A;
ECFieldElement eCFieldElement2 = curve.B;
int coordinateSystem = curve.CoordinateSystem;
ECFieldElement eCFieldElement5;
ECFieldElement eCFieldElement4;
if (coordinateSystem == 6)
{
ECFieldElement eCFieldElement3 = base.RawZCoords[0];
bool isOne = eCFieldElement3.IsOne;
if (rawXCoord.IsZero)
{
eCFieldElement4 = rawYCoord.Square();
eCFieldElement5 = eCFieldElement2;
if (!isOne)
{
ECFieldElement b = eCFieldElement3.Square();
eCFieldElement5 = eCFieldElement5.Multiply(b);
}
}
else
{
ECFieldElement eCFieldElement6 = rawYCoord;
ECFieldElement eCFieldElement7 = rawXCoord.Square();
if (isOne)
{
eCFieldElement4 = eCFieldElement6.Square().Add(eCFieldElement6).Add(eCFieldElement);
eCFieldElement5 = eCFieldElement7.Square().Add(eCFieldElement2);
}
else
{
ECFieldElement eCFieldElement8 = eCFieldElement3.Square();
ECFieldElement y = eCFieldElement8.Square();
eCFieldElement4 = eCFieldElement6.Add(eCFieldElement3).MultiplyPlusProduct(eCFieldElement6, eCFieldElement, eCFieldElement8);
eCFieldElement5 = eCFieldElement7.SquarePlusProduct(eCFieldElement2, y);
}
eCFieldElement4 = eCFieldElement4.Multiply(eCFieldElement7);
}
}
else
{
eCFieldElement4 = rawYCoord.Add(rawXCoord).Multiply(rawYCoord);
switch (coordinateSystem)
{
case 1:
{
ECFieldElement eCFieldElement9 = base.RawZCoords[0];
if (!eCFieldElement9.IsOne)
{
ECFieldElement b2 = eCFieldElement9.Square();
ECFieldElement b3 = eCFieldElement9.Multiply(b2);
eCFieldElement4 = eCFieldElement4.Multiply(eCFieldElement9);
eCFieldElement = eCFieldElement.Multiply(eCFieldElement9);
eCFieldElement2 = eCFieldElement2.Multiply(b3);
}
break;
}
default:
throw new InvalidOperationException("unsupported coordinate system");
case 0:
break;
}
eCFieldElement5 = rawXCoord.Add(eCFieldElement).Multiply(rawXCoord.Square()).Add(eCFieldElement2);
}
return(eCFieldElement4.Equals(eCFieldElement5));
}
public override ECPoint Twice()
{
ECFieldElement element26;
ECFieldElement element27;
ECFieldElement element29;
if (base.IsInfinity)
{
return(this);
}
ECCurve curve = this.Curve;
ECFieldElement rawXCoord = base.RawXCoord;
if (rawXCoord.IsZero)
{
return(curve.Infinity);
}
switch (curve.CoordinateSystem)
{
case 0:
{
ECFieldElement b = base.RawYCoord.Divide(rawXCoord).Add(rawXCoord);
ECFieldElement x = b.Square().Add(b).Add(curve.A);
return(new F2mPoint(curve, x, rawXCoord.SquarePlusProduct(x, b.AddOne()), base.IsCompressed));
}
case 1:
{
ECFieldElement rawYCoord = base.RawYCoord;
ECFieldElement b = base.RawZCoords[0];
bool isOne = b.IsOne;
ECFieldElement element8 = !isOne?rawXCoord.Multiply(b) : rawXCoord;
ECFieldElement element9 = !isOne?rawYCoord.Multiply(b) : rawYCoord;
ECFieldElement element10 = rawXCoord.Square();
ECFieldElement element11 = element10.Add(element9);
ECFieldElement element12 = element8;
ECFieldElement x = element12.Square();
ECFieldElement y = element11.Add(element12);
ECFieldElement element15 = y.MultiplyPlusProduct(element11, x, curve.A);
ECFieldElement element16 = element12.Multiply(element15);
ECFieldElement element17 = element10.Square().MultiplyPlusProduct(element12, element15, y);
ECFieldElement element18 = element12.Multiply(x);
return(new F2mPoint(curve, element16, element17, new ECFieldElement[] { element18 }, base.IsCompressed));
}
case 6:
{
ECFieldElement element31;
ECFieldElement rawYCoord = base.RawYCoord;
ECFieldElement b = base.RawZCoords[0];
bool isOne = b.IsOne;
ECFieldElement element21 = !isOne?rawYCoord.Multiply(b) : rawYCoord;
ECFieldElement element22 = !isOne?b.Square() : b;
ECFieldElement a = curve.A;
ECFieldElement element24 = !isOne?a.Multiply(element22) : a;
ECFieldElement x = rawYCoord.Square().Add(element21).Add(element24);
if (x.IsZero)
{
return(new F2mPoint(curve, x, curve.B.Sqrt(), base.IsCompressed));
}
element26 = x.Square();
element27 = !isOne?x.Multiply(element22) : x;
ECFieldElement element28 = curve.B;
if (element28.BitLength >= (curve.FieldSize >> 1))
{
ECFieldElement element32 = !isOne?rawXCoord.Multiply(b) : rawXCoord;
element29 = element32.SquarePlusProduct(x, element21).Add(element26).Add(element27);
break;
}
ECFieldElement element30 = rawYCoord.Add(rawXCoord).Square();
if (element28.IsOne)
{
element31 = element24.Add(element22).Square();
}
else
{
element31 = element24.SquarePlusProduct(element28, element22.Square());
}
element29 = element30.Add(x).Add(element22).Multiply(element30).Add(element31).Add(element26);
if (a.IsZero)
{
element29 = element29.Add(element27);
}
else if (!a.IsOne)
{
element29 = element29.Add(a.AddOne().Multiply(element27));
}
break;
}
default:
throw new InvalidOperationException("unsupported coordinate system");
}
return(new F2mPoint(curve, element26, element29, new ECFieldElement[] { element27 }, base.IsCompressed));
}
protected override bool SatisfiesCurveEquation()
{
ECFieldElement element5;
ECFieldElement element6;
ECCurve curve = this.Curve;
ECFieldElement rawXCoord = base.RawXCoord;
ECFieldElement rawYCoord = base.RawYCoord;
ECFieldElement a = curve.A;
ECFieldElement b = curve.B;
int coordinateSystem = curve.CoordinateSystem;
if (coordinateSystem == 6)
{
ECFieldElement element7 = base.RawZCoords[0];
bool isOne = element7.IsOne;
if (rawXCoord.IsZero)
{
element5 = rawYCoord.Square();
element6 = b;
if (!isOne)
{
ECFieldElement element8 = element7.Square();
element6 = element6.Multiply(element8);
}
}
else
{
ECFieldElement element9 = rawYCoord;
ECFieldElement element10 = rawXCoord.Square();
if (isOne)
{
element5 = element9.Square().Add(element9).Add(a);
element6 = element10.Square().Add(b);
}
else
{
ECFieldElement y = element7.Square();
ECFieldElement element12 = y.Square();
element5 = element9.Add(element7).MultiplyPlusProduct(element9, a, y);
element6 = element10.SquarePlusProduct(b, element12);
}
element5 = element5.Multiply(element10);
}
}
else
{
element5 = rawYCoord.Add(rawXCoord).Multiply(rawYCoord);
if (coordinateSystem != 0)
{
if (coordinateSystem != 1)
{
throw new InvalidOperationException("unsupported coordinate system");
}
ECFieldElement element13 = base.RawZCoords[0];
if (!element13.IsOne)
{
ECFieldElement element14 = element13.Square();
ECFieldElement element15 = element13.Multiply(element14);
element5 = element5.Multiply(element13);
a = a.Multiply(element13);
b = b.Multiply(element15);
}
}
element6 = rawXCoord.Add(a).Multiply(rawXCoord.Square()).Add(b);
}
return(element5.Equals(element6));
}
public override ECPoint Twice()
{
if (base.IsInfinity)
{
return(this);
}
ECCurve curve = this.Curve;
ECFieldElement rawXCoord = base.RawXCoord;
if (rawXCoord.IsZero)
{
return(curve.Infinity);
}
int coordinateSystem = curve.CoordinateSystem;
int num = coordinateSystem;
switch (num)
{
case 0:
{
ECFieldElement rawYCoord = base.RawYCoord;
ECFieldElement eCFieldElement = rawYCoord.Divide(rawXCoord).Add(rawXCoord);
ECFieldElement x = eCFieldElement.Square().Add(eCFieldElement).Add(curve.A);
ECFieldElement y = rawXCoord.SquarePlusProduct(x, eCFieldElement.AddOne());
return(new F2mPoint(curve, x, y, base.IsCompressed));
}
case 1:
{
ECFieldElement rawYCoord2 = base.RawYCoord;
ECFieldElement eCFieldElement2 = base.RawZCoords[0];
bool isOne = eCFieldElement2.IsOne;
ECFieldElement eCFieldElement3 = isOne ? rawXCoord : rawXCoord.Multiply(eCFieldElement2);
ECFieldElement b = isOne ? rawYCoord2 : rawYCoord2.Multiply(eCFieldElement2);
ECFieldElement eCFieldElement4 = rawXCoord.Square();
ECFieldElement eCFieldElement5 = eCFieldElement4.Add(b);
ECFieldElement eCFieldElement6 = eCFieldElement3;
ECFieldElement eCFieldElement7 = eCFieldElement6.Square();
ECFieldElement eCFieldElement8 = eCFieldElement5.Add(eCFieldElement6);
ECFieldElement eCFieldElement9 = eCFieldElement8.MultiplyPlusProduct(eCFieldElement5, eCFieldElement7, curve.A);
ECFieldElement x2 = eCFieldElement6.Multiply(eCFieldElement9);
ECFieldElement y2 = eCFieldElement4.Square().MultiplyPlusProduct(eCFieldElement6, eCFieldElement9, eCFieldElement8);
ECFieldElement eCFieldElement10 = eCFieldElement6.Multiply(eCFieldElement7);
return(new F2mPoint(curve, x2, y2, new ECFieldElement[]
{
eCFieldElement10
}, base.IsCompressed));
}
default:
{
if (num != 6)
{
throw new InvalidOperationException("unsupported coordinate system");
}
ECFieldElement rawYCoord3 = base.RawYCoord;
ECFieldElement eCFieldElement11 = base.RawZCoords[0];
bool isOne2 = eCFieldElement11.IsOne;
ECFieldElement eCFieldElement12 = isOne2 ? rawYCoord3 : rawYCoord3.Multiply(eCFieldElement11);
ECFieldElement eCFieldElement13 = isOne2 ? eCFieldElement11 : eCFieldElement11.Square();
ECFieldElement a = curve.A;
ECFieldElement eCFieldElement14 = isOne2 ? a : a.Multiply(eCFieldElement13);
ECFieldElement eCFieldElement15 = rawYCoord3.Square().Add(eCFieldElement12).Add(eCFieldElement14);
if (eCFieldElement15.IsZero)
{
return(new F2mPoint(curve, eCFieldElement15, curve.B.Sqrt(), base.IsCompressed));
}
ECFieldElement eCFieldElement16 = eCFieldElement15.Square();
ECFieldElement eCFieldElement17 = isOne2 ? eCFieldElement15 : eCFieldElement15.Multiply(eCFieldElement13);
ECFieldElement b2 = curve.B;
ECFieldElement eCFieldElement19;
if (b2.BitLength < curve.FieldSize >> 1)
{
ECFieldElement eCFieldElement18 = rawYCoord3.Add(rawXCoord).Square();
ECFieldElement b3;
if (b2.IsOne)
{
b3 = eCFieldElement14.Add(eCFieldElement13).Square();
}
else
{
b3 = eCFieldElement14.SquarePlusProduct(b2, eCFieldElement13.Square());
}
eCFieldElement19 = eCFieldElement18.Add(eCFieldElement15).Add(eCFieldElement13).Multiply(eCFieldElement18).Add(b3).Add(eCFieldElement16);
if (a.IsZero)
{
eCFieldElement19 = eCFieldElement19.Add(eCFieldElement17);
}
else if (!a.IsOne)
{
eCFieldElement19 = eCFieldElement19.Add(a.AddOne().Multiply(eCFieldElement17));
}
}
else
{
ECFieldElement eCFieldElement20 = isOne2 ? rawXCoord : rawXCoord.Multiply(eCFieldElement11);
eCFieldElement19 = eCFieldElement20.SquarePlusProduct(eCFieldElement15, eCFieldElement12).Add(eCFieldElement16).Add(eCFieldElement17);
}
return(new F2mPoint(curve, eCFieldElement16, eCFieldElement19, new ECFieldElement[]
{
eCFieldElement17
}, base.IsCompressed));
}
}
}
