From 524f9ebd32a66c369f93fffc678a6d1d6a6864dc Mon Sep 17 00:00:00 2001
From: Satoshi Yamaguchi <satoshi.yamaguchi@gmail.com>
Date: Mon, 15 Aug 2022 16:09:40 +0900
Subject: [PATCH] Add argument check and error message to
 wolfSSL_PEM_read_RSA_PUBKEY

---
 src/pk.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/pk.c b/src/pk.c
index cb2c47f35..4e3140773 100644
--- a/src/pk.c
+++ b/src/pk.c
@@ -1585,6 +1585,12 @@ WOLFSSL_RSA *wolfSSL_PEM_read_RSA_PUBKEY(XFILE fp,
     WOLFSSL_RSA* rsa = NULL;
 
     WOLFSSL_ENTER("wolfSSL_PEM_read_RSA_PUBKEY");
+    
+    /* Validate parameters. */
+    if (fp == NULL) {
+        WOLFSSL_MSG("Bad function arguments");
+        return NULL;
+    }
 
     /* Read into a new EVP_PKEY. */
     pkey = wolfSSL_PEM_read_PUBKEY(fp, NULL, cb, pass);
@@ -1600,6 +1606,9 @@ WOLFSSL_RSA *wolfSSL_PEM_read_RSA_PUBKEY(XFILE fp,
 
         wolfSSL_EVP_PKEY_free(pkey);
     }
+    else {
+        WOLFSSL_MSG("wolfSSL_PEM_read_PUBKEY failed");
+    }
 
     return rsa;
 }