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Date: Mon, 2 Apr 2012 22:50:51 +0530
From: Dhiru Kholia <dhiru.kholia@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: Cracking Office 2007 files with JtR!
On Mon, Apr 2, 2012 at 10:30 PM, Solar Designer <solar@...nwall.com> wrote:
> On Mon, Apr 02, 2012 at 09:04:52PM +0530, Dhiru Kholia wrote:
>> I have just committed a rough (it is in heavy debugging stage) patch
>> to crack Office 2007 documents with JtR.
>
> Wow. Thank you!
>
> Well, but it wouldn't work yet since you had the password being tested
> hard-coded. ;-) I've corrected this with the attached patch (it also
> speeds things up by a whopping 1% here).
heh, my bad! Will apply your patch to git.
>> Performance on Atom(TM) CPU N270,
>>
>> $ ../run/john -format=office -t
>> Benchmarking: Office [32/32]... DONE
>> Raw: 30.3 c/s real, 30.3 c/s virtual
>
> That's 50k iterations of SHA-1. Definitely something to have on GPU.
> And no need to move AES to GPU then.
True.
> Why is the length limited to 8? Can't Office 2007 files have longer
> passwords?
Password can be longer. Fixing this too. Thanks for the early report.
--
Cheers,
Dhiru
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