1 files changed, 3 insertions, 0 deletions
diff --git a/src/key.h b/src/key.h
index cf1165d3d0..37a06810b4 100644
--- a/src/key.h
+++ b/src/key.h
@@ -269,6 +269,9 @@ public:
 
     // Load private key and check that public key matches.
     bool Load(CPrivKey &privkey, CPubKey &vchPubKey, bool fSkipCheck);
+
+    // Check whether an element of a signature (r or s) is valid.
+    static bool CheckSignatureElement(const unsigned char *vch, int len, bool half);
 };
 
 struct CExtPubKey {