Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Thu, 12 Apr 2012 21:54:27 +0400
From: Solar Designer <>
Subject: Re: JTR against 135 millions MD5 hashes

On Thu, Apr 12, 2012 at 07:40:20PM +0200, wrote:
>  I'm trying my own text dictionary (6 gigas) against 135 millions (4,6 gigas) hash file.

Is this part of KoreLogic's torrent with lots of hashes?  (I haven't
looked at it yet.)

>  After 20 minutes, JTR begin to crack MD5, but it very very slow, in fact JTR seems frozen, I can hear the hard drive running and running.

How much RAM do you have?

How much does the "john" process occupy?

What version of JtR is that?

>  JTR display also -> "excessive partial hash collisions detected"

Thanks for the info.  We'll need to check whether this is supposed to
happen with that number of hashes or not.

>  If I try the same process with only 200 megas hashes files (4.6 splitted in 200 megas parts), this time JTR crack tons of MD5 after 2 or 3 minutes.
>  Is JTR able to crack 1 file with 135 millions MD5 hashes ?

It should be, but you may need more RAM.  Alternatively, try the
--save-memory=2 option or/and split the file into a few chunks (e.g.,
maybe halves of that large file will fit in your RAM one at a time).


Powered by blists - more mailing lists

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.