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- <?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>
- * @author Paragon Initiative Enterprises <security@paragonie.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>
- * @author Paragon Initiative Enterprises <security@paragonie.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, $part2)
- {
- return (string) ($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, $part2)
- {
- // Both mixers are identical, this is for speed, not security
- return (string) ($part1 ^ $part2);
- }
- }
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