From c0231e2f15d3b42258d5c65c465205ca97e233de Mon Sep 17 00:00:00 2001
From: JoelKatz <DavidJoelSchwartz@GMail.com>
Date: Sun, 29 Apr 2012 18:32:18 -0700
Subject: [PATCH] Paranoia check for identical finished messages.

---
 src/Peer.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Peer.cpp b/src/Peer.cpp
index 842bc6d13..4b1a4f561 100644
--- a/src/Peer.cpp
+++ b/src/Peer.cpp
@@ -727,8 +727,10 @@ void Peer::getSessionCookie(std::string& strDst)
 
 	SHA512(s1, l1, sha1);
 	SHA512(s2, l2, sha2);
+	if (memcmp(s1, s2, sizeof(sha1))
+		throw std::runtime_errror("Identical finished messages");
 
-	for (int i=0; i<sizeof(sha1); i++)
+	for (int i = 0; i < sizeof(sha1); ++i)
 		sha1[i] ^= sha2[i];
 
 	strDst.assign((char *) &sha1[0], sizeof(sha1));