From 94c3ad66a9e803b7d4d38c750a26b532f2083995 Mon Sep 17 00:00:00 2001
From: Paul Kehrer <paul.l.kehrer@gmail.com>
Date: Mon, 30 Dec 2013 11:11:42 -0600
Subject: additional check to verify the ENGINE_new doesn't return null

---
 cryptography/hazmat/backends/openssl/urand_engine.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cryptography/hazmat/backends/openssl/urand_engine.py b/cryptography/hazmat/backends/openssl/urand_engine.py
index 705ff092..e97476a4 100644
--- a/cryptography/hazmat/backends/openssl/urand_engine.py
+++ b/cryptography/hazmat/backends/openssl/urand_engine.py
@@ -133,6 +133,9 @@ static RAND_METHOD urandom_rand = {
 
 int Cryptography_add_urandom_engine(void) {
     ENGINE *e = ENGINE_new();
+    if (e == NULL) {
+        return 0;
+    }
     if(!ENGINE_set_id(e, Cryptography_urandom_engine_id) ||
             !ENGINE_set_name(e, Cryptography_urandom_engine_name) ||
             !ENGINE_set_RAND(e, &urandom_rand) ||
-- 
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