Date: Sat, 15 Sep 2018 10:04:28 -0300 From: Claudio André <claudioandre.br@...il.com> To: john-users@...ts.openwall.com Subject: John the Ripper on Windows (includes OpenCL on Windows) Hi all, after a private discussion about JtR on Windows I would like to share my point of view . --- I would say that if you need John for Windows you should use https://rebrand.ly/JtRWin64 : - it is 100% JtR magnum's source code; - it is built and tested on an actual (and auditable) Windows machine; - it works on CMD, no need to install CygWin, ... - I (tried, at least, to) handled all details; For example: from jeff at https://www.openwall.com/lists/john-users/2018/09/12/5 > Warning: '/dev/shm' does not exists or is not a directory. > POSIX shared memory objects require the existance of this directory. > Create the directory '/dev/shm' and set the permissions to 01777. > For instance on the command line: mkdir -m 01777 /dev/shm > No OpenCL devices found This is a known issue, please read: - https://github.com/magnumripper/JohnTheRipper/issues/3191 Well, my advice is (and it applies to all "Windows situations"): - use the package (https://rebrand.ly/JtRWin64) and check if it works; - or verify if replacing cygOpenCL-1.dll with OpenCL.dll JtR works; - or what happens if other format is used; What I know: - CygWin OpenCL DLL needs proper ICD information; - This information might be in some package I'm not aware (yet). I need to play with CygWin when I put my hands on some M$ box. - I doubt you have all the necessary things in the right place. - Anyway, IMO, the choices made by CygWin make sense; That said, I know the package works "out of the box" for some people. Still need to test it in the wild. Claudio  I'm not a mailing list user . So, I'm afraid I can't be part of the discussions.  The readme is at https://github.com/claudioandre-br/packages/blob/master/john-the-ripper/readme.md#windows  At least, - check if you are running an updated CygWin - check if you have installed all needed CygWin OpenCL packages - run `strace -e -f trace=open john [arguments]` And so on.  They are pre-flood tech, IMO.
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