From 7b7c658668af8d52f19c4473e2fca319d27151d3 Mon Sep 17 00:00:00 2001
From: Ruby Martin <ruby@wolfssl.com>
Date: Mon, 7 Jul 2025 14:10:41 -0600
Subject: [PATCH] add null check to wc_Des_CbcEncrypt

---
 wolfcrypt/src/des3.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/wolfcrypt/src/des3.c b/wolfcrypt/src/des3.c
index adefaa229..4ab5b7415 100644
--- a/wolfcrypt/src/des3.c
+++ b/wolfcrypt/src/des3.c
@@ -1727,6 +1727,10 @@
     {
         word32 blocks = sz / DES_BLOCK_SIZE;
 
+        if (des == NULL || out == NULL || in == NULL) {
+            return BAD_FUNC_ARG;
+        }
+
         while (blocks--) {
             xorbuf((byte*)des->reg, in, DES_BLOCK_SIZE);
             DesProcessBlock(des, (byte*)des->reg, (byte*)des->reg);