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Date: Sun, 26 Jul 2020 09:50:18 -0400
From: Alexander Hunt <alexhunt308@...il.com>
To: "john-users@...ts.openwall.com" <john-users@...ts.openwall.com>
Subject: Re: Known part of password, attempting incremental attack
Thank you Alexander. I had John running in a Linux VM on my Windows machine
so I was unable to use the GPU. I’ve had issues with dual booting before
which is why I used a VM. I will install a Linux distro onto a separate
drive so I can have GPU support. I have an AMD FX6300 and a Radeon R9 280x,
so outdated old hardware but good for its day.
I will try the suggestions you gave.. thank you
Alexander.
On Thursday, July 23, 2020, Solar Designer <solar@...nwall.com> wrote:
> On Wed, Jul 22, 2020 at 09:27:53PM -0400, Alexander Hunt wrote:
> > It is a pages document so i used iWork2john
> >
> > [List.Rules:nraph]
> > A0???Known??? Az???0!???
> > A0???Knownba??? Az???0!???
> > A0???Known??? Az???ba0!
> > A0???Knownguft??? Az???0!???
>
> > ./john --wordlist=wordlist.lst --rules=nraph
>
> This looks reasonable (assuming you had proper ASCII quote character
> there and not the fancy UTF-8 one that Gmail substituted, and that you
> didn't miss the closing quote on rule 3 above).
>
> > Speed:
> > 344.3 p/s
>
> You didn't mention the iteration count, but for iteration count 100000
> that we use in benchmarks this would correspond to an older quad-core
> CPU without AVX2. That's fine.
>
> We also support iWork on GPU, where you could get maybe 100x higher
> speeds, like this on Vega 64:
>
> $ ./john -test -form=iwork-opencl
> Device 1: gfx900 [Radeon RX Vega]
> Benchmarking: iwork-opencl, Apple iWork '09 or newer [PBKDF2-SHA1 AES
> OpenCL]... LWS=64 GWS=16384 (256 blocks) DONE
> Speed for cost 1 (iteration count) of 100000
> Raw: 38824 c/s real, 431157 c/s virtual
>
> However, as always, it's more important to focus the attack than to
> improve the speed.
>
> Alexander
>
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