From 3c810bb4e03f3313f5c084747b3c2fd3f16845db Mon Sep 17 00:00:00 2001
From: Jeffrey Paul <sneak@acidhou.se>
Date: Fri, 8 Apr 2016 02:43:20 +0200
Subject: [PATCH] fix FIPS regression in 4.x

https://github.com/nodejs/node/pull/3755#issuecomment-207066246
---
 lib/_tls_wrap.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/_tls_wrap.js b/lib/_tls_wrap.js
index e340e4a041b6ee..28e4171c30ede4 100644
--- a/lib/_tls_wrap.js
+++ b/lib/_tls_wrap.js
@@ -19,7 +19,13 @@ const defaultSessionIdContext = getDefaultSessionIdContext();
 function getDefaultSessionIdContext() {
   var defaultText = process.argv.join(' ');
   /* SSL_MAX_SID_CTX_LENGTH is 128 bits */
-  if (process.config.variables.openssl_fips) {
+  if (
+    process.config &&
+    'variables' in process.config &&
+    process.config.variables &&
+    'openssl_fips' in process.config.variables &&
+    process.config.variables.openssl_fips
+  ) {
     return crypto.createHash('sha1')
       .update(defaultText)
       .digest('hex').slice(0, 32);