john-users - RE: DES with OpenMP

Openwall GNU/*/Linux 3.0 - a small security-enhanced Linux distro for servers

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Date: Tue, 31 Jan 2012 00:00:06 +0000
From: Alex Sicamiotis <alekshs@...mail.com>
To: <john-users@...ts.openwall.com>
Subject: RE: DES with OpenMP

> 
> This is DES_bs_cpt in DES_bs.h, and this setting is only used in OpenMP
> builds.  By default it's 32, but you can try any value starting with 1.
> 

Aha, thanks... I feel this has potential for speeding up things.

> BTW, I guess those 11 minutes seen in the log above are wasted counting
> and validating your preprocessed rules, which you have a ridiculous
> number of (600 million, IIRC).  Originally, this was not an intended use
> for the rules, but I guess I'll need to introduce some better support
> for that, which would avoid the waste of time at startup.  Would you
> trade saving the 11 minutes for lack of a progress indicator maybe (so
> that we don't need to count the rules)?
> 
> Alexander

That was on a new incremental attempt with -i:all (replaced with a custom .chr). 

As
 for the rules, I think the most I've waited for the rule processing was
 something like two minutes. As far as I'm concerned, the indicator 
resetting every once in a while is a minor bug. Especially if the rules 
are [a-z] type where you can plainly see the progress by the first 
letter. For other rules it may not be so clear but I generally calculate
 the time needed with a spreadsheet even before I start the attempt (old
 habits...) so I have a fairly accurate idea of the time left.