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| author | Peter Dettman <peter.dettman@bouncycastle.org> | 2023-09-06 12:12:54 +0700 |
|---|---|---|
| committer | Peter Dettman <peter.dettman@bouncycastle.org> | 2023-09-06 12:12:54 +0700 |
| commit | 20aae3e5ed3738a4afc42e1ac183d5a7d1a4bd12 (patch) | |
| tree | 2dd92643ef91c6948babedb77d9fafc92f02bd9f | |
| parent | Microsoft.NET.Test.Sdk 17.7.2 (diff) | |
| download | BouncyCastle.NET-ed25519-20aae3e5ed3738a4afc42e1ac183d5a7d1a4bd12.tar.xz | |
EdDSA: Minor verification optimization
| -rw-r--r-- | crypto/src/math/ec/rfc8032/Ed25519.cs | 6 | ||||
| -rw-r--r-- | crypto/src/math/ec/rfc8032/Ed448.cs | 6 |
2 files changed, 12 insertions, 0 deletions
diff --git a/crypto/src/math/ec/rfc8032/Ed25519.cs b/crypto/src/math/ec/rfc8032/Ed25519.cs index 8add3c48b..bf3a1a8d8 100644 --- a/crypto/src/math/ec/rfc8032/Ed25519.cs +++ b/crypto/src/math/ec/rfc8032/Ed25519.cs @@ -1714,6 +1714,12 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032 int bit = 128; while (--bit >= 0) { + if (((int)ws_b[bit] | (int)ws_b[128 + bit] | (int)ws_p[bit] | (int)ws_q[bit]) != 0) + break; + } + + for (; bit >= 0; --bit) + { int wb = ws_b[bit]; if (wb != 0) { diff --git a/crypto/src/math/ec/rfc8032/Ed448.cs b/crypto/src/math/ec/rfc8032/Ed448.cs index 6eee639fe..54321e37d 100644 --- a/crypto/src/math/ec/rfc8032/Ed448.cs +++ b/crypto/src/math/ec/rfc8032/Ed448.cs @@ -1581,6 +1581,12 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032 int bit = 225; while (--bit >= 0) { + if (((int)ws_b[bit] | (int)ws_b[225 + bit] | (int)ws_p[bit] | (int)ws_q[bit]) != 0) + break; + } + + for (; bit >= 0; --bit) + { int wb = ws_b[bit]; if (wb != 0) { |