From 675c30abc222e9cab57c3dccc365cc20d4f9f375 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Tue, 17 May 2016 09:34:33 +0200
Subject: openssl: get_cert_chain: fix NULL dereference

CID 1361815: Explicit null dereferenced (FORWARD_NULL)
---
 lib/vtls/openssl.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

(limited to 'lib/vtls')

diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index 93373e03d..fea0dfe4f 100644
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -2550,9 +2550,11 @@ static CURLcode get_cert_chain(struct connectdata *conn,
       EVP_PKEY_free(pubkey);
     }
 
-    for(j = 0; j < psig->length; j++)
-      BIO_printf(mem, "%02x:", psig->data[j]);
-    push_certinfo("Signature", i);
+    if(psig) {
+      for(j = 0; j < psig->length; j++)
+        BIO_printf(mem, "%02x:", psig->data[j]);
+      push_certinfo("Signature", i);
+    }
 
     PEM_write_bio_X509(mem, x);
     push_certinfo("Cert", i);
-- 
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