From ab691309cee98d0cd5d7a44d8c8d514de6dfce66 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Tue, 26 Apr 2016 23:55:31 +0200
Subject: openssl: avoid BN_print a NULL bignum

OpenSSL 1.1.0-pre seems to return NULL(?) for a whole lot of those
numbers so make sure the function handles this.

Reported-by: Linus Nordberg
---
 lib/vtls/openssl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'lib/vtls')

diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index e9acf9a03..2d18b1bc4 100644
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -2228,7 +2228,8 @@ static void pubkey_show(struct SessionHandle *data,
 
   snprintf(namebuf, sizeof(namebuf), "%s(%s)", type, name);
 
-  BN_print(mem, bn);
+  if(bn)
+    BN_print(mem, bn);
   push_certinfo(namebuf, num);
 }
 
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