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This update mostly concerns OpenSSL being unusable on PHP 5.3~5.3.3. See #28633, #34409 Built from https://develop.svn.wordpress.org/trunk@35410 git-svn-id: http://core.svn.wordpress.org/trunk@35374 1a063a9b-81f0-0310-95a4-ce76da25c4cd
138 lines
5.5 KiB
PHP
138 lines
5.5 KiB
PHP
<?php
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/**
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* Random_* Compatibility Library
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* for using the new PHP 7 random_* API in PHP 5 projects
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2015 Paragon Initiative Enterprises
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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if (!defined('PHP_VERSION_ID')) {
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// This constant was introduced in PHP 5.2.7
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$RandomCompatversion = explode('.', PHP_VERSION);
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define('PHP_VERSION_ID', ($RandomCompatversion[0] * 10000 + $RandomCompatversion[1] * 100 + $RandomCompatversion[2]));
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$RandomCompatversion = null;
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}
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if (PHP_VERSION_ID < 70000) {
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if (!defined('RANDOM_COMPAT_READ_BUFFER')) {
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define('RANDOM_COMPAT_READ_BUFFER', 8);
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}
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$RandomCompatDIR = dirname(__FILE__);
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require_once $RandomCompatDIR.'/byte_safe_strings.php';
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require_once $RandomCompatDIR.'/cast_to_int.php';
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require_once $RandomCompatDIR.'/error_polyfill.php';
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if (!function_exists('random_bytes')) {
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/**
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* PHP 5.2.0 - 5.6.x way to implement random_bytes()
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*
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* We use conditional statements here to define the function in accordance
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* to the operating environment. It's a micro-optimization.
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*
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* In order of preference:
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* 1. Use libsodium if available.
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* 2. fread() /dev/urandom if available (never on Windows)
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* 3. mcrypt_create_iv($bytes, MCRYPT_CREATE_IV)
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* 4. COM('CAPICOM.Utilities.1')->GetRandom()
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* 5. openssl_random_pseudo_bytes() (absolute last resort)
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*
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* See ERRATA.md for our reasoning behind this particular order
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*/
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if (extension_loaded('libsodium')) {
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// See random_bytes_libsodium.php
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require_once $RandomCompatDIR.'/random_bytes_libsodium.php';
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}
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if (
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!function_exists('random_bytes') &&
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DIRECTORY_SEPARATOR === '/' &&
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@is_readable('/dev/urandom')
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) {
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// DIRECTORY_SEPARATOR === '/' on Unix-like OSes -- this is a fast
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// way to exclude Windows.
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//
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// Error suppression on is_readable() in case of an open_basedir or
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// safe_mode failure. All we care about is whether or not we can
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// read it at this point. If the PHP environment is going to panic
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// over trying to see if the file can be read in the first place,
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// that is not helpful to us here.
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// See random_bytes_dev_urandom.php
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require_once $RandomCompatDIR.'/random_bytes_dev_urandom.php';
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}
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if (
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!function_exists('random_bytes') &&
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PHP_VERSION_ID >= 50307 &&
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extension_loaded('mcrypt')
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) {
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// See random_bytes_mcrypt.php
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require_once $RandomCompatDIR.'/random_bytes_mcrypt.php';
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}
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if (
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!function_exists('random_bytes') &&
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extension_loaded('com_dotnet') &&
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class_exists('COM')
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) {
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try {
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$RandomCompatCOMtest = new COM('CAPICOM.Utilities.1');
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if (method_exists($RandomCompatCOMtest, 'GetRandom')) {
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// See random_bytes_com_dotnet.php
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require_once $RandomCompatDIR.'/random_bytes_com_dotnet.php';
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}
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} catch (com_exception $e) {
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// Don't try to use it.
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}
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$RandomCompatCOMtest = null;
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}
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if (
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!function_exists('random_bytes') &&
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extension_loaded('openssl') &&
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(
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// Unix-like with PHP >= 5.3.0 or
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(
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DIRECTORY_SEPARATOR === '/' &&
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PHP_VERSION_ID >= 50300
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) ||
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// Windows with PHP >= 5.3.4
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PHP_VERSION_ID >= 50304
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)
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) {
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// See random_bytes_openssl.php
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require_once $RandomCompatDIR.'/random_bytes_openssl.php';
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}
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if (!function_exists('random_bytes')) {
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/**
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* We don't have any more options, so let's throw an exception right now
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* and hope the developer won't let it fail silently.
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*/
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function random_bytes()
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{
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throw new Exception(
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'There is no suitable CSPRNG installed on your system'
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);
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}
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}
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}
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if (!function_exists('random_int')) {
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require_once $RandomCompatDIR.'/random_int.php';
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}
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$RandomCompatDIR = null;
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}
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