john-users - Using john des routines for 3des (or straight des) cracking

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Date: Thu, 1 Sep 2005 04:02:38 +0200
From: dvorak <dvorak@...all.nl>
To: john-users@...ts.openwall.com
Subject: Using john des routines for 3des (or straight des) cracking

Hi all,

do you have some pointers on how to convert the john des routines
so that they can be used to bruteforce 3des-ede mode (or just
straight des) 

i am looking to use the john des routines to do a single 3des
encryption to see if the password is right, but i have trouble figuring
out how to use those routines for straight des. 

I just found the LM cracker which (according to rfc2433) does:
desencrypt("KGS!@...", password)
in the bit slice implementation b[x] is being setup using some
bits, the amount of ones is 23 and so is the amount of 1's in "KGS!@..."
the different places i attribute to the permutation step that DES
does.

Does the above paragraph make any sense or i am looking in the wrong
direction?

thanks in advance,
	dvorak