From 069be208ee4df588bb3baa82e3b5b0138bb02f20 Mon Sep 17 00:00:00 2001
From: Anthony Hu <anthony@wolfssl.com>
Date: Tue, 3 Mar 2026 15:06:46 -0500
Subject: [PATCH] Macro guard parameter null check.

---
 wolfcrypt/src/asn.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/wolfcrypt/src/asn.c b/wolfcrypt/src/asn.c
index 231d250b6e..5b8432f0c7 100644
--- a/wolfcrypt/src/asn.c
+++ b/wolfcrypt/src/asn.c
@@ -42474,14 +42474,18 @@ int wc_SignCRL_ex(const byte* tbsBuf, int tbsSz, int sType,
         return BAD_FUNC_ARG;
     if (rsaKey == NULL && eccKey == NULL)
         return BAD_FUNC_ARG;
+    if (rsaKey != NULL && eccKey != NULL)
+        return BAD_FUNC_ARG;
 
     XMEMSET(certSignCtx, 0, sizeof(*certSignCtx));
 
+#ifndef NO_RSA
     if (rsaKey != NULL) {
         heap = rsaKey->heap;
     }
+#endif
 #ifdef HAVE_ECC
-    else if (eccKey != NULL) {
+    if (eccKey != NULL) {
         heap = eccKey->heap;
     }
 #endif