}
public static function encrypt($str)
{
if (Urlcrypt::$key === "") {
throw new Exception('No key provided.');
}
$key = pack('H*', Urlcrypt::$key);
$iv_size = mcrypt_get_iv_size(Urlcrypt::$cipher, Urlcrypt::$mode);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$str = utf8_encode($str);
$ciphertext = mcrypt_encrypt(Urlcrypt::$cipher, $key, $str, Urlcrypt::$mode, $iv);
$ciphertext = $iv . $ciphertext;
return Urlcrypt::encode($ciphertext);
}
public static function decrypt($str)
{
if (Urlcrypt::$key === "") {
throw new Exception('No key provided.');
}
$key = pack('H*', Urlcrypt::$key);
$str = Urlcrypt::decode($str);
$iv_size = mcrypt_get_iv_size(Urlcrypt::$cipher, Urlcrypt::$mode);
$iv_dec = substr($str, 0, $iv_size);
$str = substr($str, $iv_size);
$str = mcrypt_decrypt(Urlcrypt::$cipher, $key, $str, Urlcrypt::$mode, $iv_dec);
// http://jonathonhill.net/2013-04-05/write-tests-you-might-learn-somethin/
return rtrim($str, "");
}
}
Urlcrypt::$table = str_split(Urlcrypt::$table, 1);
