From: Arno Wagner <arno@wagner.name>
To: dm-crypt@saout.de
Subject: Re: [dm-crypt] LUKS & search for passphrase using dictionary
Date: Fri, 20 Jul 2012 01:34:12 +0200 [thread overview]
Message-ID: <20120719233412.GB24630@tansi.org> (raw)
In-Reply-To: <50088EB1.4090403@gmail.com>
On Fri, Jul 20, 2012 at 12:48:17AM +0200, Milan Broz wrote:
> Hi,
>
> From time to time someone tries to recover (or crack) LUKS passphrase
> using dictionary lists.
> I saw lately even some crazy patches for cryptsetup doing that.
Urgh :-)
> Please do not patch source or create some slow bash scripts
> (initialization and memory locking cost resources).
> Just use libcryptsetup. I added some example how to do it, see
>
> http://code.google.com/p/cryptsetup/source/browse/#git%2Fmisc%2Fdict_search
Cool! Nicely compact as any good piece of example code
should be. I also like the multi-process capability.
> e.g. for JTR known password list you can run (on quadcore cpu here)
> # luks_dict test.img /usr/share/john/password.lst 4
>
> Then read FAQ how LUKS keyslot iterations slow down these attacks...
Specifically, FAQ items 5.7, 5.8 and 5.9 can give you some
insight about the amount of effort you can expect.
> It is just quickly written example, perhaps with some bugs.
>
> Anyway, enjoy :)
> Milan
>
> p.s.
> If you really run this, compile cryptsetup with openssl support
> (configure --with-crypto_backend=openssl) it is quicker than default gcrypt.
>
> _______________________________________________
> dm-crypt mailing list
> dm-crypt@saout.de
> http://www.saout.de/mailman/listinfo/dm-crypt
>
--
Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno@wagner.name
GnuPG: ID: 1E25338F FP: 0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F
----
One of the painful things about our time is that those who feel certainty
are stupid, and those with any imagination and understanding are filled
with doubt and indecision. -- Bertrand Russell
prev parent reply other threads:[~2012-07-19 23:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-19 22:48 [dm-crypt] LUKS & search for passphrase using dictionary Milan Broz
2012-07-19 23:34 ` Arno Wagner [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20120719233412.GB24630@tansi.org \
--to=arno@wagner.name \
--cc=dm-crypt@saout.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox