From d46a70b9c8b826adbe64eed624ca92b1228be4e7 Mon Sep 17 00:00:00 2001
From: mugglewei <mugglewei@gmail.com>
Date: Tue, 19 Sep 2023 00:26:17 +0800
Subject: [PATCH] set variable 'buffer' that in base32_decode to unsigned
 integer type

In base32_decode, variable 'buffer' is signed integer may lead undefined
behavior when left operand.
---
 src/base32.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/base32.c b/src/base32.c
index 9c8e302..64c572f 100644
--- a/src/base32.c
+++ b/src/base32.c
@@ -20,7 +20,7 @@
 #include "base32.h"
 
 int base32_decode(const uint8_t *encoded, uint8_t *result, int bufSize) {
-  int buffer = 0;
+  unsigned int buffer = 0;
   int bitsLeft = 0;
   int count = 0;
   for (const uint8_t *ptr = encoded; count < bufSize && *ptr; ++ptr) {
@@ -68,7 +68,7 @@ int base32_encode(const uint8_t *data, int length, uint8_t *result,
   }
   int count = 0;
   if (length > 0) {
-    int buffer = data[0];
+    unsigned int buffer = data[0];
     int next = 1;
     int bitsLeft = 8;
     while (count < bufSize && (bitsLeft > 0 || next < length)) {