john-users - Re: checking only first 5 characters of a md5 hash

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Date: Thu, 9 Mar 2006 16:20:13 +0200
From: "Pietari Kivikangas" <JTR1998@...l.ru>
To: <john-users@...ts.openwall.com>
Subject: Re: checking only first 5 characters of a md5 hash

You can implement a temporary hack to solve your problem by modifying 
cmp_all() and/or cmp_exact() in MD5_fmt.c to compare only first doublewords, 
for example. Just experiment with those functions. If you don't know the 
exact position of known hash fragment in those structures, just make those 
function produce some output and you will clearly see it. Please note, even 
if you get a password, its hash may not be equal to the hash of correct 
password (together with unknown part of the hash).

----- Original Message ----- 
From: "Turko" <granturko@...il.com>
To: <john-users@...ts.openwall.com>
Sent: Thursday, March 09, 2006 3:14 PM
Subject: Re: [john-users] checking only first 5 characters of a md5 hash

Thanks a lot. So the problem is that John must have a complete HASH to do
his job?
How can I complete it? Is it possible to solve my problem do you think?

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