john-users - background crypt_all() calls (was: fast freebsd MD5 implementation)

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Date: Sun, 19 Oct 2008 06:04:45 +0400
From: Solar Designer <solar@...nwall.com>
To: john-users@...ts.openwall.com
Subject: background crypt_all() calls (was: fast freebsd MD5 implementation)

Simon,

On Fri, Oct 17, 2008 at 08:07:17AM +0200, Simon Marechal wrote:
> ... I'd rather have support for ''background'' crypt_all() calls
> (obviously easy to do for crack() mode, but -test would need some 
> tweaking).

What do you mean by this?  Built-in support for parallel processing -
like fork()'ed sub-processes for multi-CPU and multi-core support and
perhaps also for GPU support?  I think that for fast hashes this must be
done at a higher level in the code.  Doing inter-process communication
per crypt_all() call would be too slow for those, although for slow
hashes this is an option (and it has its advantages).

Alexander

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