From ab5158dcd3e202369bf8d7b0596827d007afa554 Mon Sep 17 00:00:00 2001
From: terrafrost <terrafrost@php.net>
Date: Sun, 3 Dec 2017 22:39:01 -0600
Subject: [PATCH] Random: return empty string if $length is 0

---
 phpseclib/Crypt/Random.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/phpseclib/Crypt/Random.php b/phpseclib/Crypt/Random.php
index 18034216..85c302f2 100644
--- a/phpseclib/Crypt/Random.php
+++ b/phpseclib/Crypt/Random.php
@@ -67,6 +67,10 @@ if (!function_exists('crypt_random_string')) {
      */
     function crypt_random_string($length)
     {
+        if (!$length) {
+            return '';
+        }
+
         if (CRYPT_RANDOM_IS_WINDOWS) {
             // method 1. prior to PHP 5.3, mcrypt_create_iv() would call rand() on windows
             if (extension_loaded('mcrypt') && version_compare(PHP_VERSION, '5.3.0', '>=')) {