[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <CAKGDhHU0BOj-OYM4cWhcysm-tNSTH7KrVMdRNmiqfHcGqCS=og@mail.gmail.com>
Date: Mon, 30 Mar 2015 07:28:21 -1000
From: Agnieszka Bielec <bielecagnieszka8@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: [GSoC] John the Ripper support for PHC finalists
Mon, 30 Mar 2015 10:24:45 +0300, Solar Designer
>More importantly, though, please let us know which JtR source files you
>used as templates for your format, both host and OpenCL. At first
>glance, it looks like you used a fast hash's one, with hacks that are
>unlikely to be of much relevance to slow hashes such as PHC's (when
>invoked with reasonable settings).
opencl_pomelo_fmt_plug.c : "Based on opencl_mysqlsha1_fmt_plug.c".
Sorry I didn't know that there are different formats
On 2015-03-30, magnum wrote:
>On 2015-03-30 01:56, Agnieszka Bielec wrote:
>> Is it possible to change 'count' variable which is passed to crypt_all,
>> after the execution of opencl_ini_auto_setup() ?
>Yes, well, cracker.c will use format->params.max_keys_per_crypt so if
>you change that, it will affect "count". But I'm not sure what you are
>aiming at.
Mon, 30 Mar 2015 10:24:45 +0300, Solar Designer
>> Curently the max m_cost in pomelo is 4 and I would like to get rid
>> of this limit
>Where does this limit come from?
Mon, 30 Mar 2015 10:24:45 +0300, Solar Designer
> Is it possible to change 'count' variable which is passed to crypt_all,
> after the execution of opencl_ini_auto_setup() ?
magnum is right - first please describe the problem and how you're
trying to solve it by this.
It's because pomelo is parametrized by m_cost (memmory cost) (and also
by t_cost which is less important)
the size of needed memory in bytes is: 1 << (13 + m_cost) which
is very much. I can't allocate as much memory in the __kernel function
so my funcion gets and makes computations on a __global buffor.
There is a problem with this because I'm allocating memory only once after
the tests but fmt_tests theoretically holds different pomelo hashes
parametrized by different m_cost. Here I have 2 problems with this.
1.We need different sizes of buffor needed by a single __kernel function
execution. I can assume that in the file we have all hashes with
the same m_cost but there is still a second problem.
2.after assumtion that in the file all hashes have this same m_cost
parameter, fmt_tests doesn't holds hashes with the same m_cost.
after opencl_init_auto_setup and autotune_run we know how much
memory is the better solution
hmmmmmmmm...... I think that I can generate fmt_tests for
the tuning but this will be ugly. I must replace fmt_tests
in the self variable passed to init function.
In this moment I assume that real tests and tuning tests
are executed separately (I hope so)
.........................................................
Sorry, I have not read everything because I don't have many time
today
Thanks
Content of type "text/html" skipped
Powered by blists - more mailing lists
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
