template/functions/endecrypt.php

<?php

	use ParagonIE\Halite\File;
	use ParagonIE\Halite\KeyFactory;
	use ParagonIE\Halite\Symmetric\Crypto as Symmetric;
	use ParagonIE\HiddenString\HiddenString;

	set_time_limit(300);

	function endecrypt($string, $encrypt = true, $file = false) {
		global $dir_files, $site_url;

		if(!file_exists($dir_files.'/'.hash('sha256', $site_url).'.key')) {
			$enckey = KeyFactory::generateEncryptionKey();
			KeyFactory::save($enckey, $dir_files.'/'.hash('sha256', $site_url).'.key');

		} else {
			$enckey = KeyFactory::loadEncryptionKey($dir_files.'/'.hash('sha256', $site_url).'.key');

			if($file == false) {
				if($encrypt == true) {
					return Symmetric::encrypt(new HiddenString($string), $enckey);
				} else {
					return Symmetric::decrypt($string, $enckey)->getString();
				}

			} else {
				if($encrypt == true) {
					File::encrypt($string, $string.'.enc', $enckey);
				} else {
					File::decrypt($string.'.enc', $string, $enckey);
				}
			}
		}
	}

?>