From 6e182686163ce3c15b878bd78c41d8d18db344f1 Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Tue, 28 Jul 2015 20:11:20 +0200
Subject: Switch to libsecp256k1-based validation for ECDSA

---
 src/pubkey.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'src/pubkey.h')

diff --git a/src/pubkey.h b/src/pubkey.h
index cce9c826e5..a1d437e706 100644
--- a/src/pubkey.h
+++ b/src/pubkey.h
@@ -177,6 +177,11 @@ public:
      */
     bool Verify(const uint256& hash, const std::vector<unsigned char>& vchSig) const;
 
+    /**
+     * Check whether a signature is normalized (lower-S).
+     */
+    static bool CheckLowS(const std::vector<unsigned char>& vchSig);
+
     //! Recover a public key from a compact signature.
     bool RecoverCompact(const uint256& hash, const std::vector<unsigned char>& vchSig);
 
@@ -205,4 +210,15 @@ struct CExtPubKey {
     bool Derive(CExtPubKey& out, unsigned int nChild) const;
 };
 
+/** Users of this module must hold an ECCVerifyHandle. The constructor and
+ *  destructor of these are not allowed to run in parallel, though. */
+class ECCVerifyHandle
+{
+    static int refcount;
+
+public:
+    ECCVerifyHandle();
+    ~ECCVerifyHandle();
+};
+
 #endif // BITCOIN_PUBKEY_H
-- 
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