Re: FileZilla Password Decoder --- $i think therefore $i am

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Amos Vryhof wrote:
> Good Morning everyone,
> 

....

> 
> def DecodePassword( strPass):
>     """Decode a filezilla password"""
>     strKey = "FILEZILLA1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ"
> 
>     nPassLen = len(strPass) / 3
>     nOffset = nPassLen % len(strKey)
> 
>     strDecodedPass = ""
> 
>     for i in range(nPassLen):
>         c = int(strPass[i * 3:(i * 3) + 3])
>         c2 = ord(strKey[(i + nOffset) % len(strKey)])
>         c3 = chr((c ^ c2))
> 
>         strDecodedPass += c3
> 
>     return strDecodedPass
> 
> ...and tried to convert it to PHP, but since I don't know Python and
> there is no documentation in the script to say what it's doing, my
> function doesn't spit out all of the right characters... (it does some
> though?? maybe coincidence)
> 
>   function DecodePassword($strPass) {
>     $strKey = "FILEZILLA1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ";
> 
>     $nPassLen = strlen($strPass) / 3;
>     $nOffset = ($nPassLen % strlen($strKey));
> 
>     $strDecodedPass = "";
>     
>     $passPieces = str_split($strPass,3);
>     
>     foreach($passPieces as $passPiece) {
>     $c = intval($passPiece);
>         $c2 = ord($strKey[($i + $nOffset) % strlen($strKey)]);

			     ^---- WHERE IS $i DEFINED? (hint: it's not :-)

>         $c3 = chr(($c ^ $c2));
> 
>        $strDecodedPass .= $c3;
>     }
> 
>     return $strDecodedPass;
> }
> 
> I know I simplified quite a bit, but I might have done it wrong...I
> tried to convert line-for line, but I'm not sure what the stuff on Lines
> 10 to 13 do. (Lack of Perl knowledge)
> 
> There are perl and Javascript functions to do the decoding at
> http://filezilla.sourceforge.net/forum/viewtopic.php?t=170
> 
> I'm not looking for a major undertaking, just something to do the
> conversion so I don't have to rebuild definitions for 200 and something
> websites.... If I can get it working properly, I'll probably put a
> version on my server so people can convert their files as well, as I can
> see this being a major PITA.
> 
> Thanks!
> 

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