From 262bc2c9e33b00fc4073be79804e554f12d3ba13 Mon Sep 17 00:00:00 2001
From: J08nY
Date: Wed, 1 Oct 2025 13:09:48 +0200
Subject: Fix fixed-window over-computation.

---
 pyecsca/codegen/templates/mult_fixed_w.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'pyecsca/codegen')

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);
-- 
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