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Date: Tue, 19 Dec 2017 15:42:38 +0000
From: Rich Rumble <richrumble@...il.com>
To: john-users@...ts.openwall.com
Subject: Re: OpenMP

On Tue, Dec 19, 2017 at 3:06 PM, Solar Designer <solar@...nwall.com> wrote:

> On Tue, Dec 19, 2017 at 01:33:56PM +0000, Mounir Belhniyene wrote:
> > Thank you so much for your fast reply. Here is it the example of password
> > cracking :
> >
> > ensaf@...af:~/JohnTheRipper-bleeding-jumbo/run$ ./zip2john
> > ~/Desktop/doc.zip > ~/Desktop/doczip.hash
> > ver 1.0 efh 5455 efh 7875 doc.zip->doc PKZIP Encr: 2b chk, TS_chk,
> > cmplen=62, decmplen=50, crc=80ECEF18
> > ensaf@...af:~/JohnTheRipper-bleeding-jumbo/run$ ./john
> ~/Desktop/doczip.hash
> > Using default input encoding: UTF-8
> > Loaded 1 password hash (PKZIP [32/64])
> > Warning: OpenMP is disabled; a non-OpenMP build may be faster
> > Press 'q' or Ctrl-C to abort, almost any other key for status
>
> This output suggests you might be on a system that has only one logical
> CPU.  Maybe a VM to which you didn't grant more than one logical CPU?
>
> Also, the PKZIP format is a "fast" one, meaning that OpenMP scaling will
> be poor even if you get it working, and you should prefer the "--fork"
> option instead.  But first you need to figure out how many logical CPUs
> you have on this system.
>
> Assuming this is Linux, can you please post the output of:
>
> cat /proc/cpuinfo
>
> Alexander
>
Similarly on windows from a CMD prompt
wmic.exe cpu get Name, NumberOfCores, NumberOfLogicalProcessors

Output:
Name                                      NumberOfCores
 NumberOfLogicalProcessors
Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz  2              4
-rich

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