From 28d20df9bab5ca78a3ed6bf51554d64b53b2212e Mon Sep 17 00:00:00 2001
From: Vadim Dvorovenko <Vadimon@mail.ru>
Date: Wed, 14 Jan 2015 23:39:14 +0700
Subject: [PATCH] MDL-48779 MNet: multibyte substr in certificate generation

Using core_text::substr instead of substr for trimming certificate
data. Is needed for sites with long unicode sitename to prevent
breaking line between unicode pair.
---
 mnet/lib.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mnet/lib.php b/mnet/lib.php
index df89cbc3b4b..6e27a0ab954 100644
--- a/mnet/lib.php
+++ b/mnet/lib.php
@@ -394,7 +394,7 @@ function mnet_generate_keypair($dn = null, $days=28) {
     );
 
     foreach ($dnlimits as $key => $length) {
-        $dn[$key] = substr($dn[$key], 0, $length);
+        $dn[$key] = core_text::substr($dn[$key], 0, $length);
     }
 
     // ensure we remove trailing slashes