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Date: Mon, 25 Mar 2019 19:14:09 +0100
From: Solar Designer <>
Cc: Claudio Andre <>
Subject: Re: Windows build no opencl devices

Hi all,

The below was already being discussed on a GitHub issue by the time Kev
posted it in here:

While I did suggested it's a john-users (user support) rather than a
GitHub matter (issue with our code), I was OK with Claudio continuing to
help Kev on that GitHub issue that time.  As I understand, the issue was
eventually resolved, and as expected turned out to be related to
software setup on the specific system.

Claudio, is there any takeaway from this, anything for us to document
for the john-users community or/and to add to our documentation?



On Mon, Feb 18, 2019 at 07:04:21PM +0000, sidebores wrote:
> Hello all,
> I posted this on the github magnum/ripper issue and got asked to post 
> here so hopefully some one can help? This is a copy and paste from my 
> question.
> Can someone help me get John working on my Win10 pro please This is the 
> build
> Version: 2019-01-31 23:28:54 +0100
> Build: cygwin 64-bit x86_64 AVX2 AC OMP
> SIMD: AVX2, interleaving: MD4:3 MD5:3 SHA1:1 SHA256:1 SHA512:1
> CPU tests: AVX2
> CPU fallback binary: john-xop
> OMP fallback binary: john-avx2-non-omp
> $JOHN is
> Format interface version: 14
> Max. number of reported tunable costs: 4
> Rec file version: REC4
> Charset file version: CHR3
> CHARSET_MIN: 1 (0x01)
> CHARSET_MAX: 255 (0xff)
> SALT_HASH_SIZE: 1048576
> SINGLE_IDX_MAX: 2147483648
> SINGLE_BUF_MAX: 4294967295
> Effective limit: Number of salts vs. SingleMaxBufferSize
> Max. Markov mode level: 400
> Max. Markov mode password length: 30
> gcc version: 6.4.0
> OpenCL headers version: 2.2
> Crypto library: OpenSSL
> OpenSSL library version: 01000210f (loaded: 0100020ef)
> OpenSSL 1.0.2p 14 Aug 2018 (loaded: OpenSSL 1.0.2n 7 Dec 2017)
> GMP library version: 6.1.2
> File locking: fcntl()
> fseek(): fseek
> ftell(): ftell
> fopen(): fopen
> memmem(): System's
> Section [opencl-device] not found.
> help[:WHAT], subformats, inc-modes, rules, externals, ext-modes, 
> ext-hybrids,
> ext-filters, ext-filters-only, build-info, hidden-options, encodings,
> formats, format-details, format-all-details, format-methods[:WHICH],
> format-tests, sections, parameters:SECTION, list-data:SECTION,
> opencl-devices,
> Does not see my Gpu
> I am running a Nvidia 1080 card which works fine with hashcat. Anyhelp 
> would be much appreciated thanks. Kev

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