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authorPeter Dettman <peter.dettman@bouncycastle.org>2023-09-06 12:12:54 +0700
committerPeter Dettman <peter.dettman@bouncycastle.org>2023-09-06 12:12:54 +0700
commit20aae3e5ed3738a4afc42e1ac183d5a7d1a4bd12 (patch)
tree2dd92643ef91c6948babedb77d9fafc92f02bd9f
parentMicrosoft.NET.Test.Sdk 17.7.2 (diff)
downloadBouncyCastle.NET-ed25519-20aae3e5ed3738a4afc42e1ac183d5a7d1a4bd12.tar.xz
EdDSA: Minor verification optimization
-rw-r--r--crypto/src/math/ec/rfc8032/Ed25519.cs6
-rw-r--r--crypto/src/math/ec/rfc8032/Ed448.cs6
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)
                 {