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<?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 <[email protected]> |
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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 Hash medium strength mixer class |
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* |
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* This class implements a mixer based upon the recommendations in RFC 4086 |
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* section 5.2 |
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* |
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* PHP version 5.3 |
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* |
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* @see http://tools.ietf.org/html/rfc4086#section-5.2 |
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* |
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* @category PHPCryptLib |
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* @package Random |
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* @subpackage Mixer |
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* |
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* @author Anthony Ferrara <[email protected]> |
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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\Mixer; |
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use SecurityLib\Strength; |
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/** |
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* The Hash medium strength mixer class |
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* |
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* This class implements a mixer based upon the recommendations in RFC 4086 |
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* section 5.2 |
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* |
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* @see http://tools.ietf.org/html/rfc4086#section-5.2 |
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* |
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* @category PHPCryptLib |
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* @package Random |
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* @subpackage Mixer |
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* |
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* @author Anthony Ferrara <[email protected]> |
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*/ |
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class XorMixer extends \RandomLib\AbstractMixer |
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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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return new Strength(Strength::VERYLOW); |
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} |
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/** |
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* Test to see if the mixer is available |
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* |
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* @return bool If the mixer is available on the system |
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*/ |
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public static function test() |
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{ |
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return true; |
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} |
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/** |
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* Get the block size (the size of the individual blocks used for the mixing) |
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* |
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* @return int The block size |
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*/ |
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protected function getPartSize() |
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{ |
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return 64; |
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} |
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/** |
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* Mix 2 parts together using one method |
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* |
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* @param string $part1 The first part to mix |
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* @param string $part2 The second part to mix |
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* |
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* @return string The mixed data |
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*/ |
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protected function mixParts1($part1, $part2) |
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{ |
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return $part1 ^ $part2; |
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} |
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/** |
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* Mix 2 parts together using another different method |
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* |
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* @param string $part1 The first part to mix |
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* @param string $part2 The second part to mix |
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* |
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* @return string The mixed data |
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*/ |
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protected function mixParts2($part1, $part2) |
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{ |
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// Both mixers are identical, this is for speed, not security |
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return $part1 ^ $part2; |
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} |
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} |
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ircmaxell /
RandomLib
