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qa-tool/htdocs/oidc/phpseclib/Math/Common/FiniteField/Integer.php

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+<?php
+
+declare(strict_types=1);
+
+/**
+ * Finite Field Integer Base Class
+ *
+ * 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
+ */
+
+namespace phpseclib3\Math\Common\FiniteField;
+
+/**
+ * Finite Field Integer
+ *
+ * @author  Jim Wigginton <terrafrost@php.net>
+ */
+abstract class Integer implements \JsonSerializable
+{
+    /**
+     * JSON Serialize
+     *
+     * Will be called, automatically, when json_encode() is called on a BigInteger object.
+     *
+     * PHP Serialize isn't supported because unserializing would require the factory be
+     * serialized as well and that just sounds like too much
+     *
+     * @return array{hex: string}
+     */
+    #[\ReturnTypeWillChange]
+    public function jsonSerialize(): array
+    {
+        return ['hex' => $this->toHex(true)];
+    }
+
+    /**
+     * Converts an Integer to a hex string (eg. base-16).
+     */
+    abstract public function toHex(): string;
+}