From 06bd504c9b9672e5b3b8174f9514a62aef3006c7 Mon Sep 17 00:00:00 2001
From: Mirek Kratochvil <exa.exa@gmail.com>
Date: Wed, 18 Jul 2012 11:19:24 +0200
Subject: [PATCH] mce: remove check that allows bit-flipping attack

---
 lib/mce.cpp | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/lib/mce.cpp b/lib/mce.cpp
index 5c5ce25..3808467 100644
--- a/lib/mce.cpp
+++ b/lib/mce.cpp
@@ -86,12 +86,6 @@ int privkey::decrypt (const bvector&in, bvector&out)
 	if (!evaluate_error_locator_trace (loc, ev, fld) )
 		return 1; //if decoding somehow failed, fail as well.
 
-	// check the error vector, it should have exactly t == deg (g) errors
-	if ( (int) ev.hamming_weight() != g.degree() )
-		return 1;
-	//TODO cryptoanalysis suggests omitting this check for preventing
-	//bit-flipping attack
-
 	//correct the errors
 	canonical.add (ev);