mirror of
https://github.com/WordPress/WordPress.git
synced 2024-12-23 17:48:01 +01:00
0e322469a6
`random_compat` offers a set of compatible functions for older versions of PHP, filling in the gap by using other PHP extensions when available. We still include our existing `wp_rand()` functionality as a fallback for when no proper CSPRNG exists on the system. Props sarciszewski See #28633 Built from https://develop.svn.wordpress.org/trunk@34922 git-svn-id: http://core.svn.wordpress.org/trunk@34887 1a063a9b-81f0-0310-95a4-ce76da25c4cd
84 lines
3.4 KiB
PHP
84 lines
3.4 KiB
PHP
<?php
|
|
/**
|
|
* Random_* Compatibility Library
|
|
* for using the new PHP 7 random_* API in PHP 5 projects
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2015 Paragon Initiative Enterprises
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
if (!defined('PHP_VERSION_ID')) {
|
|
// This constant was introduced in PHP 5.2.7
|
|
$version = explode('.', PHP_VERSION);
|
|
define('PHP_VERSION_ID', ($version[0] * 10000 + $version[1] * 100 + $version[2]));
|
|
}
|
|
if (PHP_VERSION_ID < 70000) {
|
|
if (!defined('RANDOM_COMPAT_READ_BUFFER')) {
|
|
define('RANDOM_COMPAT_READ_BUFFER', 8);
|
|
}
|
|
require_once "byte_safe_strings.php";
|
|
require_once "error_polyfill.php";
|
|
if (!function_exists('random_bytes')) {
|
|
/**
|
|
* PHP 5.2.0 - 5.6.x way to implement random_bytes()
|
|
*
|
|
* We use conditional statements here to define the function in accordance
|
|
* to the operating environment. It's a micro-optimization.
|
|
*
|
|
* In order of preference:
|
|
* 1. fread() /dev/urandom if available
|
|
* 2. mcrypt_create_iv($bytes, MCRYPT_CREATE_IV)
|
|
* 3. COM('CAPICOM.Utilities.1')->GetRandom()
|
|
* 4. openssl_random_pseudo_bytes()
|
|
*
|
|
* See ERRATA.md for our reasoning behind this particular order
|
|
*/
|
|
if (!ini_get('open_basedir') && is_readable('/dev/urandom')) {
|
|
// See random_bytes_dev_urandom.php
|
|
require_once "random_bytes_dev_urandom.php";
|
|
} elseif (PHP_VERSION_ID >= 50307 && function_exists('mcrypt_create_iv')) {
|
|
// See random_bytes_mcrypt.php
|
|
require_once "random_bytes_mcrypt.php";
|
|
} elseif (extension_loaded('com_dotnet')) {
|
|
// See random_bytes_com_dotnet.php
|
|
require_once "random_bytes_com_dotnet.php";
|
|
} elseif (function_exists('openssl_random_pseudo_bytes')) {
|
|
// See random_bytes_openssl.php
|
|
require_once "random_bytes_openssl.php";
|
|
} else {
|
|
/**
|
|
* We don't have any more options, so let's throw an exception right now
|
|
* and hope the developer won't let it fail silently.
|
|
*/
|
|
function random_bytes()
|
|
{
|
|
throw new Exception(
|
|
'There is no suitable CSPRNG installed on your system'
|
|
);
|
|
}
|
|
}
|
|
}
|
|
if (!function_exists('random_int')) {
|
|
require_once "random_int.php";
|
|
}
|
|
}
|