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Date: Fri, 29 Jun 2012 19:15:21 +0200
From: Frank Dittrich <frank_dittrich@...mail.com>
To: john-dev@...ts.openwall.com
Subject: Re: For some dynamic formats on linux-x86-mmx build cracking
 depends on password candidate sequence

On 06/29/2012 07:00 PM, jfoug wrote:
>>>From Frank Dittrich:  Friday, June 29, 2012 6:33 AM
>>
>> $ uname -srvp
>> Linux 3.4.2-1.fc16.i686.PAE #1 SMP Thu Jun 14 20:53:38 UTC 2012 i686
>>
>> $ cd test
>> $ mv pw.dic pw.dic.orig
>> $ LC_ALL=C tac pw.dic.orig > pw.dic
>>
>> $ sha1sum pw.dic.orig pw.dic
>> 71e6e0bb9c766c2030730ee1effde079b9fb1222  pw.dic.orig
>> ee862671a9c34fc76b863670782b3959d0319caa  pw.dic
>> $ ./jtrts.pl -q dynamic
>> ------------------------------------------------------------------------
>> -------
>> - JtR-TestSuite (jtrts). Version 1.12.4, June 22, 2012.  By, Jim
>> Fougeron & others
>> - Testing:  John the Ripper password cracker, ver: 1.7.9-jumbo-6 [linux-
>> x86-mmx]
>> ------------------------------------------------------------------------
>> --------
>> form=dynamic_2                    guesses: 1496 time: 0:00:00:00 :
>> Expected count(s) (1500)  [!!!FAILED!!!]
> 
> Clip
> 
> I am absolutely NOT able to get a pw.dic file reversed using tac, to fail (cygwin 32 bit builds).  Also, my tac version has the EXACT same sha1sum as what you list here.
[...]
> All tests passed without error.  Performed 42 tests.  Time used was 120 seconds
> 
> $ shasum pw.dic
> ee862671a9c34fc76b863670782b3959d0319caa *pw.dic
> 
> Nothing fails.
> 
> Could there be some other 'reason'?

I don't know. Both the clang compiler and gcc (or some library) broken
on Fedora 16? Some hardware error? Hardly.

> I do not build with OMP.  Was this an OMP build?

No OMP. (But I could try OMP - I'd think it will fail as well.)

> I am at a loss, and am not able to replicate the problem you are seeing.

I'll try to reproduce using other Linux distributions (on different
hardware), but that will take time (next week, may be?).

Frank

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