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qa-tool/htdocs/oidc/phpseclib/Math/BigInteger/Engines/GMP/DefaultEngine.php

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+<?php
+
+/**
+ * GMP 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
+ */
+
+declare(strict_types=1);
+
+namespace phpseclib3\Math\BigInteger\Engines\GMP;
+
+use phpseclib3\Math\BigInteger\Engines\GMP;
+
+/**
+ * GMP Modular Exponentiation Engine
+ *
+ * @author  Jim Wigginton <terrafrost@php.net>
+ */
+abstract class DefaultEngine extends GMP
+{
+    /**
+     * Performs modular exponentiation.
+     */
+    protected static function powModHelper(GMP $x, GMP $e, GMP $n): GMP
+    {
+        $temp = new GMP();
+        $temp->value = gmp_powm($x->value, $e->value, $n->value);
+
+        return $x->normalize($temp);
+    }
+}