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| author | Peter Dettman <peter.dettman@bouncycastle.org> | 2014-03-12 18:13:12 +0700 |
|---|---|---|
| committer | Peter Dettman <peter.dettman@bouncycastle.org> | 2014-03-12 18:13:12 +0700 |
| commit | 4b5cf5479807fc2652888be79fca4ab659662306 (patch) | |
| tree | ea348719135acaa53a393f632ad31975e2c16de9 /crypto/src/math/ec | |
| parent | Allow subclasses to override the ECMultiplier used for base-point multiplication (diff) | |
| download | BouncyCastle.NET-ed25519-4b5cf5479807fc2652888be79fca4ab659662306.tar.xz | |
All subclasses to control the choice of width to use
Diffstat (limited to 'crypto/src/math/ec')
| -rw-r--r-- | crypto/src/math/ec/multiplier/FixedPointCombMultiplier.cs | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/crypto/src/math/ec/multiplier/FixedPointCombMultiplier.cs b/crypto/src/math/ec/multiplier/FixedPointCombMultiplier.cs index 48ce4a56c..e3da3f7c2 100644 --- a/crypto/src/math/ec/multiplier/FixedPointCombMultiplier.cs +++ b/crypto/src/math/ec/multiplier/FixedPointCombMultiplier.cs @@ -21,8 +21,7 @@ namespace Org.BouncyCastle.Math.EC.Multiplier throw new InvalidOperationException("fixed-point comb doesn't support scalars larger than the curve order"); } - // TODO Call method to let subclasses select width - int width = size > 257 ? 6 : 5; + int width = GetWidthForCombSize(size); FixedPointPreCompInfo info = FixedPointUtilities.Precompute(p, width); ECPoint[] lookupTable = info.PreComp; @@ -50,5 +49,10 @@ namespace Org.BouncyCastle.Math.EC.Multiplier return R; } + + protected virtual int GetWidthForCombSize(int combSize) + { + return combSize > 257 ? 6 : 5; + } } } |