From 6f1fe2e4b916e22e7342c3bc7d88f3fc298a4473 Mon Sep 17 00:00:00 2001
From: JacobBarthelmeh <jacob@wolfssl.com>
Date: Wed, 23 Apr 2025 17:11:05 -0600
Subject: [PATCH] add sanity check on des cbc decrypt, CID 512990

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

diff --git a/wolfcrypt/src/des3.c b/wolfcrypt/src/des3.c
index 7a9ba3bc7..c4593c226 100644
--- a/wolfcrypt/src/des3.c
+++ b/wolfcrypt/src/des3.c
@@ -1742,6 +1742,10 @@
     {
         word32 blocks = sz / DES_BLOCK_SIZE;
 
+        if (des == NULL || out == NULL || in == NULL) {
+            return BAD_FUNC_ARG;
+        }
+
         while (blocks--) {
             XMEMCPY(des->tmp, in, DES_BLOCK_SIZE);
             DesProcessBlock(des, (byte*)des->tmp, out);