public static function Crypt($str, $key = false)
{
if ($key === false) {
$key = COption::GetOptionString("main", "pwdhashadd", "ldap");
}
$key1 = CLdapUtil::BinMD5($key);
while ($str) {
if (function_exists('mb_substr')) {
$m = mb_substr($str, 0, 16, "ASCII");
$str = mb_substr($str, 16, mb_strlen($str, "ASCII") - 16, "ASCII");
} else {
$m = substr($str, 0, 16);
$str = substr($str, 16);
}
$res .= CLdapUtil::ByteXOR($m, $key1, 16);
$key1 = CLdapUtil::BinMD5($key . $key1 . $m);
}
return base64_encode($res);
}
