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-rw-r--r--crypto/src/math/ec/rfc8032/Ed25519.cs2
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/src/math/ec/rfc8032/Ed25519.cs b/crypto/src/math/ec/rfc8032/Ed25519.cs
index 0b0e649d7..2dd9e2f6f 100644
--- a/crypto/src/math/ec/rfc8032/Ed25519.cs
+++ b/crypto/src/math/ec/rfc8032/Ed25519.cs
@@ -330,7 +330,7 @@ namespace Org.BouncyCastle.Math.EC.Rfc8032
 
             Dom2(d, phflag, ctx);
             d.BlockUpdate(R, 0, PointBytes);
-            d.BlockUpdate(pk, 0, PointBytes);
+            d.BlockUpdate(pk, pkOff, PointBytes);
             d.BlockUpdate(m, mOff, mLen);
             d.DoFinal(h, 0);