ok
Direktori : /home2/selectio/public_html/3-idiots/vendor/phpseclib/phpseclib/phpseclib/Math/ |
Current File : /home2/selectio/public_html/3-idiots/vendor/phpseclib/phpseclib/phpseclib/Math/PrimeField.php |
<?php /** * Prime Finite Fields * * Utilizes the factory design pattern * * PHP version 5 and 7 * * @author Jim Wigginton <terrafrost@php.net> * @copyright 2017 Jim Wigginton * @license http://www.opensource.org/licenses/mit-license.html MIT License * @link http://pear.php.net/package/Math_BigInteger */ namespace phpseclib3\Math; use phpseclib3\Math\Common\FiniteField; use phpseclib3\Math\PrimeField\Integer; /** * Prime Finite Fields * * @author Jim Wigginton <terrafrost@php.net> */ class PrimeField extends FiniteField { /** * Instance Counter * * @var int */ private static $instanceCounter = 0; /** * Keeps track of current instance * * @var int */ protected $instanceID; /** * Default constructor */ public function __construct(BigInteger $modulo) { if (!$modulo->isPrime()) { throw new \UnexpectedValueException('PrimeField requires a prime number be passed to the constructor'); } $this->instanceID = self::$instanceCounter++; Integer::setModulo($this->instanceID, $modulo); Integer::setRecurringModuloFunction($this->instanceID, $modulo->createRecurringModuloFunction()); } /** * Use a custom defined modular reduction function * * @return void */ public function setReduction(\Closure $func) { $this->reduce = $func->bindTo($this, $this); } /** * Returns an instance of a dynamically generated PrimeFieldInteger class * * @return Integer */ public function newInteger(BigInteger $num) { return new Integer($this->instanceID, $num); } /** * Returns an integer on the finite field between one and the prime modulo * * @return Integer */ public function randomInteger() { static $one; if (!isset($one)) { $one = new BigInteger(1); } return new Integer($this->instanceID, BigInteger::randomRange($one, Integer::getModulo($this->instanceID))); } /** * Returns the length of the modulo in bytes * * @return int */ public function getLengthInBytes() { return Integer::getModulo($this->instanceID)->getLengthInBytes(); } /** * Returns the length of the modulo in bits * * @return int */ public function getLength() { return Integer::getModulo($this->instanceID)->getLength(); } /** * Destructor */ public function __destruct() { Integer::cleanupCache($this->instanceID); } }