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<?php
/**
* Built-In BCMath Modular Exponentiation Engine
*
* 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\BigInteger\Engines\BCMath;
use phpseclib3\Math\BigInteger\Engines\BCMath;
/**
* Built-In BCMath Modular Exponentiation Engine
*
* @author Jim Wigginton <terrafrost@php.net>
*/
abstract class BuiltIn extends BCMath
{
/**
* Performs modular exponentiation.
*
* @param BCMath $x
* @param BCMath $e
* @param BCMath $n
* @return BCMath
*/
protected static function powModHelper(BCMath $x, BCMath $e, BCMath $n)
{
$temp = new BCMath();
$temp->value = bcpowmod($x->value, $e->value, $n->value, 0);
return $x->normalize($temp);
}
}
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