From ec61e07d18b8efc97ac9e6d6b019708f7607ad1f Mon Sep 17 00:00:00 2001
From: Daniel Pouzzner <douzzer@wolfssl.com>
Date: Tue, 24 Mar 2026 12:07:04 -0500
Subject: [PATCH] wolfcrypt/src/pwdbased.c: in wc_PKCS12_PBKDF_ex(), refactor
 the "Increment B by 1" loop to avoid bugprone-inc-dec-in-conditions.

---
 wolfcrypt/src/pwdbased.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/wolfcrypt/src/pwdbased.c b/wolfcrypt/src/pwdbased.c
index 90dc8ed339..c2ed5c042f 100644
--- a/wolfcrypt/src/pwdbased.c
+++ b/wolfcrypt/src/pwdbased.c
@@ -687,9 +687,12 @@ int wc_PKCS12_PBKDF_ex(byte* output, const byte* passwd, int passLen,
         PKCS12_ByteReverseWords(Bw, Bw, v);
 #endif
         /* Increment B by 1. */
-        k = nwc;
-        while ((k-- > 0) && (++Bw[k] == 0))
-            ;
+        for (k = nwc; k > 0; ) {
+            --k;
+            ++Bw[k];
+            if (Bw[k] != 0)
+                break;
+        }
 
 #ifndef BIG_ENDIAN_ORDER
         PKCS12_ByteReverseWords((PKCS12_WORD*)I, (PKCS12_WORD*)I, nBlocks * v);