From 9be73c126d32f62a3774fe3d0931b17022645f7e Mon Sep 17 00:00:00 2001
From: Jesse Norell <jesse@kci.net>
Date: Thu, 24 Mar 2022 09:37:49 -0600
Subject: [PATCH] add compatibility functions to installer environment
---
install/lib/compatibility.inc.php | 80 +++++++++++++++++++++++++++++++
install/lib/install.lib.php | 1 +
2 files changed, 81 insertions(+)
create mode 100644 install/lib/compatibility.inc.php
diff --git a/install/lib/compatibility.inc.php b/install/lib/compatibility.inc.php
new file mode 100644
index 0000000000..562e07ada4
--- /dev/null
+++ b/install/lib/compatibility.inc.php
@@ -0,0 +1,80 @@
+<?php
+
+/*
+Copyright (c) 2021, Jesse Norell <jesse@kci.net>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+ * Neither the name of ISPConfig nor the names of its contributors
+ may be used to endorse or promote products derived from this software without
+ specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/* random_bytes can be dropped when php 5.6 support is dropped */
+if (! function_exists('random_bytes')) {
+ function random_bytes($length) {
+ return openssl_random_pseudo_bytes($length);
+ }
+}
+
+/* random_int can be dropped when php 5.6 support is dropped */
+if (! function_exists('random_int')) {
+ function random_int($min=null, $max=null) {
+ if (null === $min) {
+ $min = PHP_INT_MIN;
+ }
+
+ if (null === $max) {
+ $min = PHP_INT_MAX;
+ }
+
+ if (!is_int($min) || !is_int($max)) {
+ trigger_error('random_int: $min and $max must be integer values', E_USER_NOTICE);
+ $min = (int)$min;
+ $max = (int)$max;
+ }
+
+ if ($min > $max) {
+ trigger_error('random_int: $max can\'t be lesser than $min', E_USER_WARNING);
+ return null;
+ }
+
+ $range = $counter = $max - $min;
+ $bits = 1;
+
+ while ($counter >>= 1) {
+ ++$bits;
+ }
+
+ $bytes = (int)max(ceil($bits/8), 1);
+ $bitmask = pow(2, $bits) - 1;
+
+ if ($bitmask >= PHP_INT_MAX) {
+ $bitmask = PHP_INT_MAX;
+ }
+
+ do {
+ $result = hexdec(bin2hex(random_bytes($bytes))) & $bitmask;
+ } while ($result > $range);
+
+ return $result + $min;
+ }
+}
diff --git a/install/lib/install.lib.php b/install/lib/install.lib.php
index 0f57e1f456..88021a8881 100644
--- a/install/lib/install.lib.php
+++ b/install/lib/install.lib.php
@@ -29,6 +29,7 @@ EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
error_reporting(E_ALL|E_STRICT);
+require_once 'compatibility.inc.php';
$FILE = realpath('../install.php');
--
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