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system/Test/Mock/MockSecurity.php

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+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Test\Mock;
+
+use CodeIgniter\Security\Security;
+
+class MockSecurity extends Security
+{
+    protected function doSendCookie(): void
+    {
+        $_COOKIE['csrf_cookie_name'] = $this->hash;
+    }
+
+    protected function randomize(string $hash): string
+    {
+        $keyBinary  = hex2bin('005513c290126d34d41bf41c5265e0f1');
+        $hashBinary = hex2bin($hash);
+
+        return bin2hex(($hashBinary ^ $keyBinary) . $keyBinary);
+    }
+}