/**
* @param string $string
* @return string
*/
public function deCrypt($string = '')
{
$appKey = md5($this->appKey);
$salt = $this->user->getSalt();
$letter = -1;
$char = -1;
$new_str = '';
$new_salt = '';
$str_to_decrypt = base64_decode($string);
$strlen = strlen($str_to_decrypt);
$saltLen = strlen($salt);
for ($i = 0; $i < $saltLen; $i++) {
$char++;
if ($char > 30) {
$char = 0;
}
$newSalt = ord($salt[$i]) + ord($appKey[$char]);
if ($newSalt > 255) {
$newSalt -= 256;
}
$new_salt .= chr($newSalt);
}
for ($i = 0; $i < $strlen; $i++) {
$letter++;
if ($letter > 30) {
$letter = 0;
}
$neword = ord($str_to_decrypt[$i]) - ord($new_salt[$letter]);
if ($neword < 1) {
$neword += 256;
}
$new_str .= chr($neword);
}
return $new_str;
}
