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File: XorMixer.php
<?php /* * The RandomLib library for securely generating random numbers and strings in PHP * * @author Anthony Ferrara <ircmaxell@ircmaxell.com> * @copyright 2011 The Authors * @license http://www.opensource.org/licenses/mit-license.html MIT License * @version Build @@version@@ */ /** * The Hash medium strength mixer class * * This class implements a mixer based upon the recommendations in RFC 4086 * section 5.2 * * PHP version 5.3 * * @see http://tools.ietf.org/html/rfc4086#section-5.2 * * @category PHPCryptLib * @package Random * @subpackage Mixer * * @author Anthony Ferrara <ircmaxell@ircmaxell.com> * @copyright 2011 The Authors * @license http://www.opensource.org/licenses/mit-license.html MIT License * * @version Build @@version@@ */ namespace RandomLib\Mixer; use SecurityLib\Strength; /** * The Hash medium strength mixer class * * This class implements a mixer based upon the recommendations in RFC 4086 * section 5.2 * * @see http://tools.ietf.org/html/rfc4086#section-5.2 * * @category PHPCryptLib * @package Random * @subpackage Mixer * * @author Anthony Ferrara <ircmaxell@ircmaxell.com> */ class XorMixer extends \RandomLib\AbstractMixer { /** * Return an instance of Strength indicating the strength of the source * * @return \SecurityLib\Strength An instance of one of the strength classes */ public static function getStrength() { return new Strength(Strength::VERYLOW); } /** * Test to see if the mixer is available * * @return bool If the mixer is available on the system */ public static function test() { return true; } /** * Get the block size (the size of the individual blocks used for the mixing) * * @return int The block size */ protected function getPartSize() { return 64; } /** * Mix 2 parts together using one method * * @param string $part1 The first part to mix * @param string $part2 The second part to mix * * @return string The mixed data */ protected function mixParts1($part1, $part2) { return $part1 ^ $part2; } /** * Mix 2 parts together using another different method * * @param string $part1 The first part to mix * @param string $part2 The second part to mix * * @return string The mixed data */ protected function mixParts2($part1, $part2) { // Both mixers are identical, this is for speed, not security return $part1 ^ $part2; } }