84 lines
2.2 KiB
PHP
84 lines
2.2 KiB
PHP
<?php
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/*
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* The RandomLib library for securely generating random numbers and strings in PHP
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*
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* @author Anthony Ferrara <ircmaxell@ircmaxell.com>
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* @copyright 2011 The Authors
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @version Build @@version@@
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*/
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/**
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* The Rand Random Number Source
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*
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* This source generates low strength random numbers by using the internal
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* rand() function. By itself it is quite weak. However when combined with
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* other sources it does provide significant benefit.
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*
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* PHP version 5.3
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*
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* @category PHPCryptLib
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* @package Random
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* @subpackage Source
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*
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* @author Anthony Ferrara <ircmaxell@ircmaxell.com>
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* @copyright 2011 The Authors
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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*
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* @version Build @@version@@
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*/
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namespace RandomLib\Source;
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use SecurityLib\Strength;
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/**
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* The Rand Random Number Source
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*
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* This source generates low strength random numbers by using the internal
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* rand() function. By itself it is quite weak. However when combined with
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* other sources it does provide significant benefit.
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*
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* @category PHPCryptLib
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* @package Random
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* @subpackage Source
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*
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* @author Anthony Ferrara <ircmaxell@ircmaxell.com>
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* @codeCoverageIgnore
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*/
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class Rand extends \RandomLib\AbstractSource
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{
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/**
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* Return an instance of Strength indicating the strength of the source
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*
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* @return \SecurityLib\Strength An instance of one of the strength classes
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*/
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public static function getStrength()
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{
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// Detect if Suhosin Hardened PHP patch is applied
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if (defined('S_ALL')) {
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return new Strength(Strength::LOW);
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} else {
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return new Strength(Strength::VERYLOW);
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}
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}
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/**
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* Generate a random string of the specified size
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*
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* @param int $size The size of the requested random string
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*
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* @return string A string of the requested size
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*/
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public function generate($size)
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{
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$result = '';
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for ($i = 0; $i < $size; $i++) {
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$result .= chr((rand() ^ rand()) % 256);
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}
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return $result;
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}
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}
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