From aec2bd459ef8ca66e52b5315a284e5d7744bc641 Mon Sep 17 00:00:00 2001
From: "Diego F. Aranha" <dfaranha@gmail.com>
Date: Thu, 4 Jul 2024 20:45:32 +0200
Subject: [PATCH] Remove UB.

---
 src/bn/relic_bn_smb.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/bn/relic_bn_smb.c b/src/bn/relic_bn_smb.c
index 7e0e610f9..14aa8c92e 100644
--- a/src/bn/relic_bn_smb.c
+++ b/src/bn/relic_bn_smb.c
@@ -155,15 +155,15 @@ int bn_smb_jac(const bn_t a, const bn_t b) {
 					n = (n - d) >> 1;
 					ai = ai - ci;
 					bi = bi - di;
-					ci = ci << 1;
-					di = di << 1;
+					ci += ci;
+					di += di;
 					t ^= d ^ (d >> 1);
 					i -= 1;
 				} else {
 					z = RLC_MIN(i, arch_tzcnt(n));
 					t ^= (d ^ (d >> 1)) & (z << 1);
-					ci = ci << z;
-					di = di << z;
+					ci = (dig_t)ci << z;
+					di = (dig_t)di << z;
 					n >>= z;
 					i -= z;
 				}