private static ECPoint ImplSumOfMultiplies(bool[] negs, WNafPreCompInfo[] infos, byte[][] wnafs)
{
int len = 0, count = wnafs.Length;
for (int i = 0; i < count; ++i)
{
len = System.Math.Max(len, wnafs[i].Length);
}
ECCurve curve = infos[0].PreComp[0].Curve;
ECPoint infinity = curve.Infinity;
ECPoint R = infinity;
int zeroes = 0;
for (int i = len - 1; i >= 0; --i)
{
ECPoint r = infinity;
for (int j = 0; j < count; ++j)
{
byte[] wnaf = wnafs[j];
int wi = i < wnaf.Length ? (int)(sbyte)wnaf[i] : 0;
if (wi != 0)
{
int n = System.Math.Abs(wi);
WNafPreCompInfo info = infos[j];
ECPoint[] table = (wi < 0 == negs[j]) ? info.PreComp : info.PreCompNeg;
r = r.Add(table[n >> 1]);
}
}
if (r == infinity)
{
++zeroes;
continue;
}
if (zeroes > 0)
{
R = R.TimesPow2(zeroes);
zeroes = 0;
}
R = R.TwicePlus(r);
}
if (zeroes > 0)
{
R = R.TimesPow2(zeroes);
}
return(R);
}
private static ECPoint ImplShamirsTrickWNaf(ECPoint[] preCompP, ECPoint[] preCompNegP, byte[] wnafP,
ECPoint[] preCompQ, ECPoint[] preCompNegQ, byte[] wnafQ)
{
int len = System.Math.Max(wnafP.Length, wnafQ.Length);
ECCurve curve = preCompP[0].Curve;
ECPoint infinity = curve.Infinity;
ECPoint R = infinity;
int zeroes = 0;
for (int i = len - 1; i >= 0; --i)
{
int wiP = i < wnafP.Length ? (int)(sbyte)wnafP[i] : 0;
int wiQ = i < wnafQ.Length ? (int)(sbyte)wnafQ[i] : 0;
if ((wiP | wiQ) == 0)
{
++zeroes;
continue;
}
ECPoint r = infinity;
if (wiP != 0)
{
int nP = System.Math.Abs(wiP);
ECPoint[] tableP = wiP < 0 ? preCompNegP : preCompP;
r = r.Add(tableP[nP >> 1]);
}
if (wiQ != 0)
{
int nQ = System.Math.Abs(wiQ);
ECPoint[] tableQ = wiQ < 0 ? preCompNegQ : preCompQ;
r = r.Add(tableQ[nQ >> 1]);
}
if (zeroes > 0)
{
R = R.TimesPow2(zeroes);
zeroes = 0;
}
R = R.TwicePlus(r);
}
if (zeroes > 0)
{
R = R.TimesPow2(zeroes);
}
return(R);
}
private static ECPoint ImplSumOfMultiplies(bool[] negs, WNafPreCompInfo[] infos, byte[][] wnafs)
{
int num = 0;
int num2 = wnafs.Length;
for (int i = 0; i < num2; i++)
{
num = Math.Max(num, wnafs[i].Length);
}
ECCurve curve = infos[0].PreComp[0].Curve;
ECPoint infinity = curve.Infinity;
ECPoint eCPoint = infinity;
int num3 = 0;
for (int j = num - 1; j >= 0; j--)
{
ECPoint eCPoint2 = infinity;
for (int k = 0; k < num2; k++)
{
byte[] array = wnafs[k];
int num4 = (int)((j < array.Length) ? ((sbyte)array[j]) : 0);
if (num4 != 0)
{
int num5 = Math.Abs(num4);
WNafPreCompInfo wNafPreCompInfo = infos[k];
ECPoint[] array2 = (num4 < 0 == negs[k]) ? wNafPreCompInfo.PreComp : wNafPreCompInfo.PreCompNeg;
eCPoint2 = eCPoint2.Add(array2[num5 >> 1]);
}
}
if (eCPoint2 == infinity)
{
num3++;
}
else
{
if (num3 > 0)
{
eCPoint = eCPoint.TimesPow2(num3);
num3 = 0;
}
eCPoint = eCPoint.TwicePlus(eCPoint2);
}
}
if (num3 > 0)
{
eCPoint = eCPoint.TimesPow2(num3);
}
return(eCPoint);
}
private static ECPoint ImplSumOfMultiplies(bool[] negs, WNafPreCompInfo[] infos, byte[][] wnafs)
{
int num = 0;
int num2 = wnafs.Length;
for (int i = 0; i < num2; i++)
{
num = System.Math.Max(num, wnafs[i].Length);
}
ECCurve curve = infos[0].PreComp[0].Curve;
ECPoint infinity = curve.Infinity;
ECPoint eCPoint = infinity;
int num3 = 0;
for (int num4 = num - 1; num4 >= 0; num4--)
{
ECPoint eCPoint2 = infinity;
for (int j = 0; j < num2; j++)
{
byte[] array = wnafs[j];
int num5 = (num4 < array.Length) ? ((sbyte)array[num4]) : 0;
if (num5 != 0)
{
int num6 = System.Math.Abs(num5);
WNafPreCompInfo wNafPreCompInfo = infos[j];
ECPoint[] array2 = (num5 < 0 != negs[j]) ? wNafPreCompInfo.PreCompNeg : wNafPreCompInfo.PreComp;
eCPoint2 = eCPoint2.Add(array2[num6 >> 1]);
}
}
if (eCPoint2 == infinity)
{
num3++;
}
else
{
if (num3 > 0)
{
eCPoint = eCPoint.TimesPow2(num3);
num3 = 0;
}
eCPoint = eCPoint.TwicePlus(eCPoint2);
}
}
if (num3 > 0)
{
eCPoint = eCPoint.TimesPow2(num3);
}
return(eCPoint);
}
private static ECPoint ImplSumOfMultiplies(bool[] negs, WNafPreCompInfo[] infos, byte[][] wnafs)
{
int num = 0;
int length = wnafs.Length;
for (int i = 0; i < length; i++)
{
num = Math.Max(num, wnafs[i].Length);
}
ECPoint infinity = infos[0].PreComp[0].Curve.Infinity;
ECPoint point2 = infinity;
int e = 0;
for (int j = num - 1; j >= 0; j--)
{
ECPoint b = infinity;
for (int k = 0; k < length; k++)
{
byte[] buffer = wnafs[k];
int num7 = (j >= buffer.Length) ? 0 : ((int)((sbyte)buffer[j]));
if (num7 != 0)
{
int num8 = Math.Abs(num7);
WNafPreCompInfo info = infos[k];
ECPoint[] pointArray = ((num7 < 0) != negs[k]) ? info.PreCompNeg : info.PreComp;
b = b.Add(pointArray[num8 >> 1]);
}
}
if (b == infinity)
{
e++;
}
else
{
if (e > 0)
{
point2 = point2.TimesPow2(e);
e = 0;
}
point2 = point2.TwicePlus(b);
}
}
if (e > 0)
{
point2 = point2.TimesPow2(e);
}
return(point2);
}
private static ECPoint ImplShamirsTrickWNaf(ECPoint[] preCompP, ECPoint[] preCompNegP, byte[] wnafP, ECPoint[] preCompQ, ECPoint[] preCompNegQ, byte[] wnafQ)
{
int num = Math.Max(wnafP.Length, wnafQ.Length);
ECCurve curve = preCompP[0].Curve;
ECPoint infinity = curve.Infinity;
ECPoint eCPoint = infinity;
int num2 = 0;
for (int i = num - 1; i >= 0; i--)
{
int num3 = (int)((i < wnafP.Length) ? ((sbyte)wnafP[i]) : 0);
int num4 = (int)((i < wnafQ.Length) ? ((sbyte)wnafQ[i]) : 0);
if ((num3 | num4) == 0)
{
num2++;
}
else
{
ECPoint eCPoint2 = infinity;
if (num3 != 0)
{
int num5 = Math.Abs(num3);
ECPoint[] array = (num3 < 0) ? preCompNegP : preCompP;
eCPoint2 = eCPoint2.Add(array[num5 >> 1]);
}
if (num4 != 0)
{
int num6 = Math.Abs(num4);
ECPoint[] array2 = (num4 < 0) ? preCompNegQ : preCompQ;
eCPoint2 = eCPoint2.Add(array2[num6 >> 1]);
}
if (num2 > 0)
{
eCPoint = eCPoint.TimesPow2(num2);
num2 = 0;
}
eCPoint = eCPoint.TwicePlus(eCPoint2);
}
}
if (num2 > 0)
{
eCPoint = eCPoint.TimesPow2(num2);
}
return(eCPoint);
}
private static ECPoint ImplShamirsTrickWNaf(ECPoint[] preCompP, ECPoint[] preCompNegP, byte[] wnafP, ECPoint[] preCompQ, ECPoint[] preCompNegQ, byte[] wnafQ)
{
int num = System.Math.Max(wnafP.Length, wnafQ.Length);
ECCurve curve = preCompP[0].Curve;
ECPoint infinity = curve.Infinity;
ECPoint eCPoint = infinity;
int num2 = 0;
for (int num3 = num - 1; num3 >= 0; num3--)
{
int num4 = (num3 < wnafP.Length) ? ((sbyte)wnafP[num3]) : 0;
int num5 = (num3 < wnafQ.Length) ? ((sbyte)wnafQ[num3]) : 0;
if ((num4 | num5) == 0)
{
num2++;
}
else
{
ECPoint eCPoint2 = infinity;
if (num4 != 0)
{
int num6 = System.Math.Abs(num4);
ECPoint[] array = (num4 >= 0) ? preCompP : preCompNegP;
eCPoint2 = eCPoint2.Add(array[num6 >> 1]);
}
if (num5 != 0)
{
int num7 = System.Math.Abs(num5);
ECPoint[] array2 = (num5 >= 0) ? preCompQ : preCompNegQ;
eCPoint2 = eCPoint2.Add(array2[num7 >> 1]);
}
if (num2 > 0)
{
eCPoint = eCPoint.TimesPow2(num2);
num2 = 0;
}
eCPoint = eCPoint.TwicePlus(eCPoint2);
}
}
if (num2 > 0)
{
eCPoint = eCPoint.TimesPow2(num2);
}
return(eCPoint);
}
private static ECPoint ImplShamirsTrickWNaf(ECPoint[] preCompP, ECPoint[] preCompNegP, byte[] wnafP, ECPoint[] preCompQ, ECPoint[] preCompNegQ, byte[] wnafQ)
{
int num = Math.Max(wnafP.Length, wnafQ.Length);
ECPoint infinity = preCompP[0].Curve.Infinity;
ECPoint point2 = infinity;
int e = 0;
for (int i = num - 1; i >= 0; i--)
{
int num4 = (i >= wnafP.Length) ? 0 : ((int)((sbyte)wnafP[i]));
int num5 = (i >= wnafQ.Length) ? 0 : ((int)((sbyte)wnafQ[i]));
if ((num4 | num5) == 0)
{
e++;
}
else
{
ECPoint b = infinity;
if (num4 != 0)
{
int num6 = Math.Abs(num4);
ECPoint[] pointArray = (num4 >= 0) ? preCompP : preCompNegP;
b = b.Add(pointArray[num6 >> 1]);
}
if (num5 != 0)
{
int num7 = Math.Abs(num5);
ECPoint[] pointArray2 = (num5 >= 0) ? preCompQ : preCompNegQ;
b = b.Add(pointArray2[num7 >> 1]);
}
if (e > 0)
{
point2 = point2.TimesPow2(e);
e = 0;
}
point2 = point2.TwicePlus(b);
}
}
if (e > 0)
{
point2 = point2.TimesPow2(e);
}
return(point2);
}
internal static ECPoint ImplSumOfMultiplies(ECPoint[] ps, BigInteger[] ks)
{
int count = ps.Length;
int[] widths = new int[count];
WNafPreCompInfo[] infos = new WNafPreCompInfo[count];
byte[][] wnafs = new byte[count][];
int len = 0;
for (int i = 0; i < count; ++i)
{
widths[i] = System.Math.Max(2, System.Math.Min(16, WNafUtilities.GetWindowSize(ks[i].BitLength)));
infos[i] = WNafUtilities.Precompute(ps[i], widths[i], true);
wnafs[i] = WNafUtilities.GenerateWindowNaf(widths[i], ks[i]);
len = System.Math.Max(len, wnafs[i].Length);
}
ECCurve curve = ps[0].Curve;
ECPoint infinity = curve.Infinity;
ECPoint R = infinity;
int zeroes = 0;
for (int i = len - 1; i >= 0; --i)
{
ECPoint r = infinity;
for (int j = 0; j < count; ++j)
{
byte[] wnaf = wnafs[j];
int wi = i < wnaf.Length ? (int)(sbyte)wnaf[i] : 0;
if (wi != 0)
{
int n = System.Math.Abs(wi);
WNafPreCompInfo info = infos[j];
ECPoint[] table = wi < 0 ? info.PreCompNeg : info.PreComp;
r = r.Add(table[n >> 1]);
}
}
if (r == infinity)
{
++zeroes;
continue;
}
if (zeroes > 0)
{
R = R.TimesPow2(zeroes);
zeroes = 0;
}
R = R.TwicePlus(r);
}
if (zeroes > 0)
{
R = R.TimesPow2(zeroes);
}
return(R);
}
internal static ECPoint ImplShamirsTrickWNaf(ECPoint P, BigInteger k, ECPoint Q, BigInteger l)
{
int widthP = System.Math.Max(2, System.Math.Min(16, WNafUtilities.GetWindowSize(k.BitLength)));
int widthQ = System.Math.Max(2, System.Math.Min(16, WNafUtilities.GetWindowSize(l.BitLength)));
WNafPreCompInfo infoP = WNafUtilities.Precompute(P, widthP, true);
WNafPreCompInfo infoQ = WNafUtilities.Precompute(Q, widthQ, true);
ECPoint[] preCompP = infoP.PreComp;
ECPoint[] preCompQ = infoQ.PreComp;
ECPoint[] preCompNegP = infoP.PreCompNeg;
ECPoint[] preCompNegQ = infoQ.PreCompNeg;
byte[] wnafP = WNafUtilities.GenerateWindowNaf(widthP, k);
byte[] wnafQ = WNafUtilities.GenerateWindowNaf(widthQ, l);
int len = System.Math.Max(wnafP.Length, wnafQ.Length);
ECCurve curve = P.Curve;
ECPoint infinity = curve.Infinity;
ECPoint R = infinity;
int zeroes = 0;
for (int i = len - 1; i >= 0; --i)
{
int wiP = i < wnafP.Length ? (int)(sbyte)wnafP[i] : 0;
int wiQ = i < wnafQ.Length ? (int)(sbyte)wnafQ[i] : 0;
if ((wiP | wiQ) == 0)
{
++zeroes;
continue;
}
ECPoint r = infinity;
if (wiP != 0)
{
int nP = System.Math.Abs(wiP);
ECPoint[] tableP = wiP < 0 ? preCompNegP : preCompP;
r = r.Add(tableP[nP >> 1]);
}
if (wiQ != 0)
{
int nQ = System.Math.Abs(wiQ);
ECPoint[] tableQ = wiQ < 0 ? preCompNegQ : preCompQ;
r = r.Add(tableQ[nQ >> 1]);
}
if (zeroes > 0)
{
R = R.TimesPow2(zeroes);
zeroes = 0;
}
R = R.TwicePlus(r);
}
if (zeroes > 0)
{
R = R.TimesPow2(zeroes);
}
return(R);
}
