From 764fadeb3b3db5c5d66d0899ddc15088b760a12d Mon Sep 17 00:00:00 2001
From: toddouska <todd@wolfssl.com>
Date: Tue, 15 Sep 2015 16:16:04 -0700
Subject: [PATCH] add sanity checks to internal RsaVerifySign inputs

---
 src/internal.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/internal.c b/src/internal.c
index 4b439cd32..6ca0441b7 100644
--- a/src/internal.c
+++ b/src/internal.c
@@ -1578,6 +1578,11 @@ int VerifyRsaSign(const byte* sig, word32 sigSz,
 
     WOLFSSL_ENTER("VerifyRsaSign");
 
+    if (sig == NULL || plain == NULL || key == NULL) {
+        WOLFSSL_MSG("Null pointer input");
+        return BAD_FUNC_ARG;
+    }
+
     if (sigSz > ENCRYPT_LEN) {
         WOLFSSL_MSG("Signature buffer too big");
         return BUFFER_E;