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Date: Fri, 2 Aug 2019 06:42:42 -0800
From: Royce Williams <>
Subject: Re: Truncated hashes with DYNAMIC mode

On Fri, Aug 2, 2019 at 5:29 AM Solar Designer <> wrote:

> On Wed, Jul 31, 2019 at 11:22:22AM -0400, Matt Weir wrote:
> > I'm looking for a way to utilize dynamic mode to generate vanity hashes.
> > For example, finding a raw-MD5 hash that starts with '12345'. I've been
> > looking through the documentation for dynamic, but I'm missing how to
> only
> > check a subset of the final hash vs the target. Is that possible, and how
> > would I go about doing that? Bonus points if I can utilize the command
> line
> > dynamic expressions.
> I'm afraid this isn't supported, but I'd like JimF to confirm this and
> consider adding such functionality.

That would be fantastic! I've long argued that such searching, if done in a
way that is low overhead for the maintainers of the tool (who are usually
not me, since my programming skills are limited), belong in the cracking
suites themselves rather than reinvented poorly or narrowly in other
frameworks. Of course, I understand that non-specialization also means that
some optimization opportunities must be discarded, so I also support
dedicated external tools when executed well. But I think that having this
in dynamic mode would be worth the trade-off.


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