From 985c71e8316820b8a4cbfb1d162ed8c10e6d5fd2 Mon Sep 17 00:00:00 2001
From: Mirek Kratochvil <exa.exa@gmail.com>
Date: Fri, 20 Apr 2012 10:11:21 +0200
Subject: [PATCH] fixes

---
 lib/bvector.cpp    | 3 ++-
 lib/decoding.cpp   | 1 +
 lib/mce.cpp        | 2 +-
 lib/polynomial.cpp | 7 ++++---
 4 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/lib/bvector.cpp b/lib/bvector.cpp
index 0623efb..04179c4 100644
--- a/lib/bvector.cpp
+++ b/lib/bvector.cpp
@@ -34,7 +34,8 @@ bool bvector::zero() const
 void bvector::to_poly (polynomial&r, gf2m&fld)
 {
 	r.clear();
-	r.resize ( (size() % fld.m) ? 1 : 0 + (size() / fld.m), 0);
+	if(size() % fld.m) return; //impossible
+	r.resize (size() / fld.m, 0);
 	for (uint i = 0; i < size(); ++i)
 		if (item (i) ) r[i/fld.m] |= 1 << (i % fld.m);
 }
diff --git a/lib/decoding.cpp b/lib/decoding.cpp
index 76542e5..d9fa83a 100644
--- a/lib/decoding.cpp
+++ b/lib/decoding.cpp
@@ -5,6 +5,7 @@ void syndrome_decode (bvector&syndrome, gf2m&fld, polynomial& goppa,
                       std::vector<polynomial>& sqInv, bvector&ev)
 
 {
+	ev.clear();
 	ev.resize (fld.n, 0);
 	if (syndrome.zero() ) return;
 
diff --git a/lib/mce.cpp b/lib/mce.cpp
index ae41459..e9a23b5 100644
--- a/lib/mce.cpp
+++ b/lib/mce.cpp
@@ -95,7 +95,7 @@ int privkey::decrypt (const bvector&in, bvector&out)
 	not_permuted.resize (Sinv.size() );
 
 	//unscramble the result
-	Sinv.mult_vec_right (not_permuted, out);
+	Sinv.mult_vecT_left (not_permuted, out);
 
 	return 0;
 }
diff --git a/lib/polynomial.cpp b/lib/polynomial.cpp
index bbab890..451e84d 100644
--- a/lib/polynomial.cpp
+++ b/lib/polynomial.cpp
@@ -244,8 +244,9 @@ void polynomial::compute_goppa_check_matrix (matrix&r, gf2m&fld)
 	//multiply by goppa coefficients (compute t*vd)
 	h.resize (fld.n);
 	for (i = 0; i < fld.n; ++i) {
-		h[i].resize (t, 0);
-		for (j = 0; j < t; ++j) //computing the element h[i][j]
+		h[i].resize (t);
+		for (j = 0; j < t; ++j) { //computing the element h[i][j]
+			h[i][j]=0;
 			for (k = 0; k <= j; ++k) //k = column index of t
 				h[i][j] = fld.add (h[i][j],
 				                   fld.mult (item (t - j + k),
@@ -285,7 +286,7 @@ void polynomial::sqrt (vector<polynomial>& sqInv, gf2m&fld)
 {
 	polynomial a = *this;
 	clear();
-	uint s=sqInv.size();
+	uint s = sqInv.size();
 	resize (s, 0);
 
 	for (uint i = 0; i < s; ++i) {