From 63e3e591b65b49b0d60f973a2ba8991d483d2a86 Mon Sep 17 00:00:00 2001
From: Mirek Kratochvil <exa.exa@gmail.com>
Date: Sun, 30 Sep 2012 17:29:42 +0200
Subject: [PATCH] mce_qd: debug

---
 lib/bvector.cpp | 10 ++++++----
 lib/mce_qd.cpp  |  4 ++--
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/lib/bvector.cpp b/lib/bvector.cpp
index 2f27f7d..36da30b 100644
--- a/lib/bvector.cpp
+++ b/lib/bvector.cpp
@@ -66,17 +66,19 @@ void bvector::to_poly_cotrace (polynomial&r, gf2m&fld)
 {
 	r.clear();
 	if (size() % fld.m) return; //impossible
-	r.resize (size() / fld.m, 0);
+	uint s=size()/fld.m;
+	r.resize (s, 0);
 	for (uint i = 0; i < size(); ++i)
-		if (item (i) ) r[i%fld.m] |= (1 << (i / fld.m) );
+		if (item (i) ) r[i%s] |= (1 << (i/s) );
 }
 
 void bvector::from_poly_cotrace (const polynomial&r, gf2m&fld)
 {
 	clear();
-	resize (r.size() *fld.m, 0);
+	uint s=r.size();
+	resize (s*fld.m, 0);
 	for (uint i = 0; i < size(); ++i)
-		item (i) = (r[i%fld.m] >> (i / fld.m) ) & 1;
+		item (i) = (r[i%s] >> (i/s) ) & 1;
 }
 
 /*
diff --git a/lib/mce_qd.cpp b/lib/mce_qd.cpp
index aba93b7..33429b4 100644
--- a/lib/mce_qd.cpp
+++ b/lib/mce_qd.cpp
@@ -90,7 +90,6 @@ int mce_qd::generate (pubkey&pub, privkey&priv, prng&rng,
 		//compute the support, retry if it has two equal elements.
 		used.clear();
 		bool consistent = true;
-		used.insert (0); //zero is forbidden
 		for (uint i = 0; i < fld.n / 2; ++i) {
 			support[i] = fld.add (
 			                 fld.inv (Hsig[i]),
@@ -121,7 +120,7 @@ int mce_qd::generate (pubkey&pub, privkey&priv, prng&rng,
 
 		//assemble blocks to bl
 		std::vector<std::vector<uint> > bl, blp;
-		bl.resize (block_size);
+		bl.resize (h_block_count);
 		for (uint i = 0; i < h_block_count; ++i)
 			bl[i] = std::vector<uint>
 			        (Hsig.begin() + i * block_size,
@@ -174,6 +173,7 @@ int mce_qd::generate (pubkey&pub, privkey&priv, prng&rng,
 				continue; //retry with other hperm
 			Hc.strip_right_square (l);
 			ri.mult (l);
+			break;
 		}
 
 		/*