using System; namespace Renci.SshNet.Security.Org.BouncyCastle.Math.EC.Multiplier { internal class WNafL2RMultiplier : AbstractECMultiplier { protected override ECPoint MultiplyPositive(ECPoint p, BigInteger k) { int num = System.Math.Max(2, System.Math.Min(16, GetWindowSize(k.BitLength))); WNafPreCompInfo wNafPreCompInfo = WNafUtilities.Precompute(p, num, true); ECPoint[] preComp = wNafPreCompInfo.PreComp; ECPoint[] preCompNeg = wNafPreCompInfo.PreCompNeg; int[] array = WNafUtilities.GenerateCompactWindowNaf(num, k); ECPoint eCPoint = p.Curve.Infinity; int num2 = array.Length; if (num2 > 1) { int num3 = array[--num2]; int num4 = num3 >> 16; int num5 = num3 & 65535; int num6 = System.Math.Abs(num4); ECPoint[] array2 = (num4 < 0) ? preCompNeg : preComp; if (num6 << 2 < 1 << num) { int num7 = LongArray.BitLengths[num6]; int num8 = num - num7; int num9 = num6 ^ (1 << num7 - 1); int num10 = (1 << num - 1) - 1; int num11 = (num9 << num8) + 1; eCPoint = array2[num10 >> 1].Add(array2[num11 >> 1]); num5 -= num8; } else eCPoint = array2[num6 >> 1]; eCPoint = eCPoint.TimesPow2(num5); } while (num2 > 0) { int num12 = array[--num2]; int num13 = num12 >> 16; int e = num12 & 65535; int num14 = System.Math.Abs(num13); ECPoint b = ((num13 < 0) ? preCompNeg : preComp)[num14 >> 1]; eCPoint = eCPoint.TwicePlus(b); eCPoint = eCPoint.TimesPow2(e); } return eCPoint; } protected virtual int GetWindowSize(int bits) { return WNafUtilities.GetWindowSize(bits); } } }