From cd57bf31ae576a178016209576c8a3c305c7b82f Mon Sep 17 00:00:00 2001
From: Andreas Fischer <bantu@phpbb.com>
Date: Mon, 3 Aug 2015 17:07:20 +0200
Subject: [PATCH] Add bootstrap.php checking environment (MB_OVERLOAD_STRING).

---
 composer.json           |  3 +++
 composer.lock           |  2 +-
 phpseclib/bootstrap.php | 16 ++++++++++++++++
 3 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 phpseclib/bootstrap.php

diff --git a/composer.json b/composer.json
index 0a133cc5..fe695fe4 100644
--- a/composer.json
+++ b/composer.json
@@ -61,6 +61,9 @@
     },
     "include-path": ["phpseclib/"],
     "autoload": {
+        "files": [
+            "phpseclib/bootstrap.php"
+        ],
         "psr-4": {
             "phpseclib\\": "phpseclib/"
         }
diff --git a/composer.lock b/composer.lock
index c98c8a4f..3e6e5c49 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "b24ab20be15b6312e532ee2ffa18d5fa",
+    "hash": "98a14889a81b2d6ecbb029483e954dec",
     "packages": [],
     "packages-dev": [
         {
diff --git a/phpseclib/bootstrap.php b/phpseclib/bootstrap.php
new file mode 100644
index 00000000..0da0999f
--- /dev/null
+++ b/phpseclib/bootstrap.php
@@ -0,0 +1,16 @@
+<?php
+/**
+ * Bootstrapping File for phpseclib
+ *
+ * @license http://www.opensource.org/licenses/mit-license.html MIT License
+ */
+
+if (extension_loaded('mbstring')) {
+    // 2 - MB_OVERLOAD_STRING
+    if (ini_get('mbstring.func_overload') & 2) {
+        throw new \UnexpectedValueException(
+            'Overloading of string functions using mbstring.func_overload ' .
+            'is not supported by phpseclib.'
+        );
+    }
+}