From a6bd58506ccb310951aa4d1d660113da19337ace Mon Sep 17 00:00:00 2001
From: AJ ONeal <coolaj86@gmail.com>
Date: Sat, 18 Aug 2018 02:27:34 -0600
Subject: [PATCH] v2.3.13: proper case handling of Host header

---
 index.js     | 4 ++--
 package.json | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/index.js b/index.js
index ec1ef46..07ee026 100644
--- a/index.js
+++ b/index.js
@@ -502,7 +502,7 @@ Greenlock.create = function (gl) {
       if (!host[0]) { realNext(); return; }
 
       // if so, remove non-allowed characters
-      var safehost = host[0].replace(SERVERNAME_G, '');
+      var safehost = host[0].toLowerCase().replace(SERVERNAME_G, '');
 
       // if there were unallowed characters, complain
       if (!gl.__sni_allow_dangerous_names && safehost.length !== host[0].length) {
@@ -513,7 +513,7 @@ Greenlock.create = function (gl) {
 
       // make lowercase
       if (!gl.__sni_preserve_case) {
-        host[0] = host[0].toLowerCase();
+        host[0] = safehost;
         req.headers.host = host.join(':');
       }
 
diff --git a/package.json b/package.json
index 7e01d1c..2955773 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "greenlock",
-  "version": "2.3.12",
+  "version": "2.3.13",
   "description": "Let's Encrypt for node.js on npm",
   "main": "index.js",
   "files": [