From 2ecaa3c4c6790116f9a7b78ad043f305b269614f Mon Sep 17 00:00:00 2001
From: Guido Vranken <guidovranken@gmail.com>
Date: Thu, 1 Apr 2021 00:57:06 +0200
Subject: [PATCH] Use unsigned integers in mp_is_bit_set

ZD 12012
---
 wolfcrypt/src/integer.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/wolfcrypt/src/integer.c b/wolfcrypt/src/integer.c
index 1751bd85b..5dd9e15fc 100644
--- a/wolfcrypt/src/integer.c
+++ b/wolfcrypt/src/integer.c
@@ -1446,10 +1446,10 @@ int mp_set (mp_int * a, mp_digit b)
 /* check if a bit is set */
 int mp_is_bit_set (mp_int *a, mp_digit b)
 {
-    int i = (int)(b / DIGIT_BIT);  /* word index */
-    int s = b % DIGIT_BIT;         /* bit index */
+    mp_digit i = b / DIGIT_BIT;  /* word index */
+    mp_digit s = b % DIGIT_BIT;  /* bit index */
 
-    if (a->used <= i) {
+    if ((mp_digit)a->used <= i) {
         /* no words avaialable at that bit count */
         return 0;
     }