i have created a script used to break base64 pass into into SHA1::
hope it helps
<style type="text/css">
<!--
.style3 {font-size: 24px}
.style1 {color: #CC0000}
-->
</style>
<?
echo("<title>L2J Pass Break</title>");
$pass = $_POST['decode'];
$unpass3 = base64_decode($pass);
$array = unpack("H*", $unpass3);
foreach ($array as $key => $value)
$unpass2 = $array[1];
echo("<span class=style1><b><u>Decoding Password</u></b></span>");
echo("<br><b>Base 64:</b> $pass<br>");
echo("<b>Unpacked:</b> $unpass3<br>");
echo("<br><b>SHA1:</b> $unpass2<br>");
?>
<form name="form1" method="post" action="">
<div align="center">
<input type="text" name="decode">
<input type="submit" value="Decode">
</div>
</form>
<br><br><br><center><i>Created by Tasha</center></i>