vector helpers

include/codecrypt.h

@@ -77,6 +77,9 @@ public:
 	void extend_left_compact (matrix&);
 	bool create_goppa_generator (matrix&, permutation&, prng&);
 	bool create_goppa_generator (matrix&, const permutation&);
+
+	bool mult_vecT_left (const bvector&, bvector&);
+	bool mult_vec_right (const bvector&, bvector&);
 };
 
 /*
@@ -158,6 +161,13 @@ public:
 	int prepare();
 	int decrypt (const bvector&, bvector&);
 	int sign (const bvector&, bvector&, uint, uint, prng&);
+
+	uint cipher_size() {
+		return Pinv.size();
+	}
+	uint plain_size() {
+		return Sinv.width();
+	}
 };
 
 class pubkey
@@ -168,6 +178,13 @@ public:
 
 	int encrypt (const bvector&, bvector&, prng&);
 	int verify (const bvector&, const bvector&, uint, uint);
+
+	uint cipher_size() {
+		return G.width();
+	}
+	uint plain_size() {
+		return G.height();
+	}
 };
 
 int generate (pubkey&, privkey&, prng&, uint m, uint t);

lib/matrix.cpp

@@ -161,3 +161,31 @@ bool matrix::create_goppa_generator (matrix&g, const permutation&p)
 	s.extend_left_compact (g);
 	return true;
 }
+
+bool matrix::mult_vecT_left (const bvector&a, bvector&r)
+{
+	uint w = width(), h = height();
+	if (a.size() != h) return false;
+	r.resize (w, 0);
+	for (uint i = 0; i < w; ++i) {
+		bool t = 0;
+		for (uint j = 0; j < h; ++j)
+			t ^= item (i) [j] & a[j];
+		r[i] = t;
+	}
+	return true;
+}
+
+bool matrix::mult_vec_right (const bvector&a, bvector&r)
+{
+	uint w = width(), h = height();
+	if (a.size() != w) return false;
+	r.resize (h, 0);
+	for (uint i = 0; i < h; ++i) {
+		bool t = 0;
+		for (uint j = 0; j < w; ++j)
+			t ^= item (j) [i] & a[j];
+		r[i] = t;
+	}
+	return true;
+}

src/main.cpp

@@ -32,7 +32,8 @@ ostream& operator<<(ostream&o, ccr::gf2m f)
 ostream& operator<< (ostream&o, ccr::matrix m)
 {
 	uint i, j, h, w;
-	h=m.height();w=m.width();
+	h = m.height();
+	w = m.width();
 	o << "binary " << h << "x" << w << " matrix:" << endl;
 	for (i = 0; i < h; ++i) {
 		for (j = 0; j < w; ++j) o << m[j][i];