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1 <?php 2 3 /** 4 * GMP Modular Exponentiation Engine 5 * 6 * PHP version 5 and 7 7 * 8 * @author Jim Wigginton <terrafrost@php.net> 9 * @copyright 2017 Jim Wigginton 10 * @license http://www.opensource.org/licenses/mit-license.html MIT License 11 * @link http://pear.php.net/package/Math_BigInteger 12 */ 13 14 namespace phpseclib3\Math\BigInteger\Engines\GMP; 15 16 use phpseclib3\Math\BigInteger\Engines\GMP; 17 18 /** 19 * GMP Modular Exponentiation Engine 20 * 21 * @author Jim Wigginton <terrafrost@php.net> 22 */ 23 abstract class DefaultEngine extends GMP 24 { 25 /** 26 * Performs modular exponentiation. 27 * 28 * @param GMP $x 29 * @param GMP $e 30 * @param GMP $n 31 * @return GMP 32 */ 33 protected static function powModHelper(GMP $x, GMP $e, GMP $n) 34 { 35 $temp = new GMP(); 36 $temp->value = gmp_powm($x->value, $e->value, $n->value); 37 38 return $x->normalize($temp); 39 } 40 }
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