--- /dev/null
+<?php
+/**
+ * Random_* Compatibility Library
+ * for using the new PHP 7 random_* API in PHP 5 projects
+ *
+ * @version 2.0.10
+ * @released 2017-03-13
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 - 2017 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
+ $RandomCompatversion = array_map('intval', explode('.', PHP_VERSION));
+ define(
+ 'PHP_VERSION_ID',
+ $RandomCompatversion[0] * 10000
+ + $RandomCompatversion[1] * 100
+ + $RandomCompatversion[2]
+ );
+ $RandomCompatversion = null;
+}
+
+/**
+ * PHP 7.0.0 and newer have these functions natively.
+ */
+if (PHP_VERSION_ID >= 70000) {
+ return;
+}
+
+if (!defined('RANDOM_COMPAT_READ_BUFFER')) {
+ define('RANDOM_COMPAT_READ_BUFFER', 8);
+}
+
+$RandomCompatDIR = dirname(__FILE__);
+
+require_once $RandomCompatDIR . '/byte_safe_strings.php';
+require_once $RandomCompatDIR . '/cast_to_int.php';
+require_once $RandomCompatDIR . '/error_polyfill.php';
+
+if (!is_callable('random_bytes')) {
+ /**
+ * PHP 5.2.0 - 5.6.x way to implement random_bytes()
+ *
+ * We use conditional statements here to define the function in accordance
+ * to the operating environment. It's a micro-optimization.
+ *
+ * In order of preference:
+ * 1. Use libsodium if available.
+ * 2. fread() /dev/urandom if available (never on Windows)
+ * 3. mcrypt_create_iv($bytes, MCRYPT_DEV_URANDOM)
+ * 4. COM('CAPICOM.Utilities.1')->GetRandom()
+ *
+ * See RATIONALE.md for our reasoning behind this particular order
+ */
+ if (extension_loaded('libsodium')) {
+ // See random_bytes_libsodium.php
+ if (PHP_VERSION_ID >= 50300 && is_callable('\\Sodium\\randombytes_buf')) {
+ require_once $RandomCompatDIR . '/random_bytes_libsodium.php';
+ } elseif (method_exists('Sodium', 'randombytes_buf')) {
+ require_once $RandomCompatDIR . '/random_bytes_libsodium_legacy.php';
+ }
+ }
+
+ /**
+ * Reading directly from /dev/urandom:
+ */
+ if (DIRECTORY_SEPARATOR === '/') {
+ // DIRECTORY_SEPARATOR === '/' on Unix-like OSes -- this is a fast
+ // way to exclude Windows.
+ $RandomCompatUrandom = true;
+ $RandomCompat_basedir = ini_get('open_basedir');
+
+ if (!empty($RandomCompat_basedir)) {
+ $RandomCompat_open_basedir = explode(
+ PATH_SEPARATOR,
+ strtolower($RandomCompat_basedir)
+ );
+ $RandomCompatUrandom = (array() !== array_intersect(
+ array('/dev', '/dev/', '/dev/urandom'),
+ $RandomCompat_open_basedir
+ ));
+ $RandomCompat_open_basedir = null;
+ }
+
+ if (
+ !is_callable('random_bytes')
+ &&
+ $RandomCompatUrandom
+ &&
+ @is_readable('/dev/urandom')
+ ) {
+ // Error suppression on is_readable() in case of an open_basedir
+ // or safe_mode failure. All we care about is whether or not we
+ // can read it at this point. If the PHP environment is going to
+ // panic over trying to see if the file can be read in the first
+ // place, that is not helpful to us here.
+
+ // See random_bytes_dev_urandom.php
+ require_once $RandomCompatDIR . '/random_bytes_dev_urandom.php';
+ }
+ // Unset variables after use
+ $RandomCompat_basedir = null;
+ } else {
+ $RandomCompatUrandom = false;
+ }
+
+ /**
+ * mcrypt_create_iv()
+ *
+ * We only want to use mcypt_create_iv() if:
+ *
+ * - random_bytes() hasn't already been defined
+ * - the mcrypt extensions is loaded
+ * - One of these two conditions is true:
+ * - We're on Windows (DIRECTORY_SEPARATOR !== '/')
+ * - We're not on Windows and /dev/urandom is readabale
+ * (i.e. we're not in a chroot jail)
+ * - Special case:
+ * - If we're not on Windows, but the PHP version is between
+ * 5.6.10 and 5.6.12, we don't want to use mcrypt. It will
+ * hang indefinitely. This is bad.
+ * - If we're on Windows, we want to use PHP >= 5.3.7 or else
+ * we get insufficient entropy errors.
+ */
+ if (
+ !is_callable('random_bytes')
+ &&
+ // Windows on PHP < 5.3.7 is broken, but non-Windows is not known to be.
+ (DIRECTORY_SEPARATOR === '/' || PHP_VERSION_ID >= 50307)
+ &&
+ // Prevent this code from hanging indefinitely on non-Windows;
+ // see https://bugs.php.net/bug.php?id=69833
+ (
+ DIRECTORY_SEPARATOR !== '/' ||
+ (PHP_VERSION_ID <= 50609 || PHP_VERSION_ID >= 50613)
+ )
+ &&
+ extension_loaded('mcrypt')
+ ) {
+ // See random_bytes_mcrypt.php
+ require_once $RandomCompatDIR . '/random_bytes_mcrypt.php';
+ }
+ $RandomCompatUrandom = null;
+
+ /**
+ * This is a Windows-specific fallback, for when the mcrypt extension
+ * isn't loaded.
+ */
+ if (
+ !is_callable('random_bytes')
+ &&
+ extension_loaded('com_dotnet')
+ &&
+ class_exists('COM')
+ ) {
+ $RandomCompat_disabled_classes = preg_split(
+ '#\s*,\s*#',
+ strtolower(ini_get('disable_classes'))
+ );
+
+ if (!in_array('com', $RandomCompat_disabled_classes)) {
+ try {
+ $RandomCompatCOMtest = new COM('CAPICOM.Utilities.1');
+ if (method_exists($RandomCompatCOMtest, 'GetRandom')) {
+ // See random_bytes_com_dotnet.php
+ require_once $RandomCompatDIR . '/random_bytes_com_dotnet.php';
+ }
+ } catch (com_exception $e) {
+ // Don't try to use it.
+ }
+ }
+ $RandomCompat_disabled_classes = null;
+ $RandomCompatCOMtest = null;
+ }
+
+ /**
+ * throw new Exception
+ */
+ if (!is_callable('random_bytes')) {
+ /**
+ * 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.
+ *
+ * @param mixed $length
+ * @return void
+ * @throws Exception
+ */
+ function random_bytes($length)
+ {
+ unset($length); // Suppress "variable not used" warnings.
+ throw new Exception(
+ 'There is no suitable CSPRNG installed on your system'
+ );
+ }
+ }
+}
+
+if (!is_callable('random_int')) {
+ require_once $RandomCompatDIR . '/random_int.php';
+}
+
+$RandomCompatDIR = null;
projects / yaffs-website / blobdiff