Fix fixed-window over-computation.

1 files changed, 3 insertions, 3 deletions

diff --git a/pyecsca/codegen/templates/mult_fixed_w.c b/pyecsca/codegen/templates/mult_fixed_w.c
index b0a4bb0..b683de0 100644
--- a/pyecsca/codegen/templates/mult_fixed_w.c
+++ b/pyecsca/codegen/templates/mult_fixed_w.c
@@ -20,7 +20,7 @@ void scalar_mult_by_m_base(point_t *point, curve_t *curve) {
 
 static void scalar_mult_inner(bn_t *scalar, point_t *point, curve_t *curve, point_t *out) {
 	point_t *q = point_copy(curve->neutral);
-    point_t *points[{{ scalarmult.m }}];
+    point_t *points[{{ scalarmult.m - 1 }}];
 
     point_t *current = point_copy(point);
     point_t *dbl = point_new();
@@ -28,7 +28,7 @@ static void scalar_mult_inner(bn_t *scalar, point_t *point, curve_t *curve, poin
     points[0] = point_copy(current);
     points[1] = point_copy(dbl);
     point_set(dbl, current);
-    for (long i = 2; i < {{ scalarmult.m }}; i++) {
+    for (long i = 2; i < {{ scalarmult.m - 1 }}; i++) {
         point_add(current, point, curve, current);
         points[i] = point_copy(current);
     }
@@ -56,7 +56,7 @@ static void scalar_mult_inner(bn_t *scalar, point_t *point, curve_t *curve, poin
     	point_scl(q, curve, q);
     {%- endif %}
     point_set(q, out);
-    for (long i = 0; i < {{ scalarmult.m }}; i++) {
+    for (long i = 0; i < {{ scalarmult.m - 1 }}; i++) {
         point_free(points[i]);
     }
 	point_free(q);