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38 lines
987 B
38 lines
987 B
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR) |
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#pragma warning disable |
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using System; |
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Math.EC.Multiplier |
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{ |
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/** |
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* Class implementing the NAF (Non-Adjacent Form) multiplication algorithm (right-to-left). |
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*/ |
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public class NafR2LMultiplier |
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: AbstractECMultiplier |
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{ |
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protected override ECPoint MultiplyPositive(ECPoint p, BigInteger k) |
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{ |
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int[] naf = WNafUtilities.GenerateCompactNaf(k); |
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ECPoint R0 = p.Curve.Infinity, R1 = p; |
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int zeroes = 0; |
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for (int i = 0; i < naf.Length; ++i) |
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{ |
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int ni = naf[i]; |
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int digit = ni >> 16; |
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zeroes += ni & 0xFFFF; |
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R1 = R1.TimesPow2(zeroes); |
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R0 = R0.Add(digit < 0 ? R1.Negate() : R1); |
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zeroes = 1; |
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} |
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return R0; |
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} |
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} |
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} |
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#pragma warning restore |
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#endif
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