diff options
Diffstat (limited to 'crypto/src/math/ec/multiplier/WNafUtilities.cs')
| -rw-r--r-- | crypto/src/math/ec/multiplier/WNafUtilities.cs | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/crypto/src/math/ec/multiplier/WNafUtilities.cs b/crypto/src/math/ec/multiplier/WNafUtilities.cs index 65d876449..42265b2d6 100644 --- a/crypto/src/math/ec/multiplier/WNafUtilities.cs +++ b/crypto/src/math/ec/multiplier/WNafUtilities.cs @@ -425,11 +425,13 @@ namespace Org.BouncyCastle.Math.EC.Multiplier if (null != existingWNaf && existingWNaf.ConfWidth == m_confWidth) { + existingWNaf.PromotionCountdown = 0; return existingWNaf; } WNafPreCompInfo result = new WNafPreCompInfo(); + result.PromotionCountdown = 0; result.ConfWidth = m_confWidth; if (null != existingWNaf) @@ -516,7 +518,10 @@ namespace Org.BouncyCastle.Math.EC.Multiplier int reqPreCompLen = 1 << (width - 2); if (CheckExisting(existingWNaf, width, reqPreCompLen, m_includeNegated)) + { + existingWNaf.DecrementPromotionCountdown(); return existingWNaf; + } WNafPreCompInfo result = new WNafPreCompInfo(); @@ -526,6 +531,9 @@ namespace Org.BouncyCastle.Math.EC.Multiplier if (null != existingWNaf) { + int promotionCountdown = existingWNaf.DecrementPromotionCountdown(); + result.PromotionCountdown = promotionCountdown; + int confWidth = existingWNaf.ConfWidth; result.ConfWidth = confWidth; @@ -700,7 +708,10 @@ namespace Org.BouncyCastle.Math.EC.Multiplier int reqPreCompLen = m_fromWNaf.PreComp.Length; if (CheckExisting(existingWNaf, width, reqPreCompLen, m_includeNegated)) + { + existingWNaf.DecrementPromotionCountdown(); return existingWNaf; + } /* * TODO Ideally this method would support incremental calculation, but given the @@ -708,6 +719,8 @@ namespace Org.BouncyCastle.Math.EC.Multiplier */ WNafPreCompInfo result = new WNafPreCompInfo(); + result.PromotionCountdown = m_fromWNaf.PromotionCountdown; + ECPoint twiceFrom = m_fromWNaf.Twice; if (null != twiceFrom) { |