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Date: Tue, 27 Feb 2018 23:19:49 +0100
From: Solar Designer <>
Subject: Re: dmg file with lost password

On Tue, Feb 27, 2018 at 05:06:50PM -0500, Ian Boyd wrote:
> Is this the information you are looking for regarding showing the full output?
> [22:37:12] /Users/ianboyd/Downloads/john- --format=dmg-opencl --single --session=/Users/ianboyd/.john/sessions/02-24-18-22-37-12 /Users/ianboyd/Desktop/Johnny files/dmgpass.lst
> Device 1: Intel(R) Iris(TM) Graphics 6100
> Using default input encoding: UTF-8
> Loaded 1 password hash (dmg-opencl, Apple DMG [PBKDF2-SHA1 OpenCL 3DES/AES])
> Will run 4 OpenMP threads
> -------------------------------------
> [22:38:35] /Users/ianboyd/Downloads/john- --restore=/Users/ianboyd/.john/sessions/02-24-18-22-33-44
> Loaded 1 password hash (dmg, Apple DMG [PBKDF2-SHA1 256/256 AVX2 8x 3DES/AES])
> Will run 4 OpenMP threads
> Proceeding with single, rules:Single
> Press 'q' or Ctrl-C to abort, almost any other key for status
> 0g 0:00:02:05 22.65% 1/3 (ETA: 22:45:42) 0g/s 87.55p/s 87.55c/s 87.55C/s Users/users/ianboyd/desktop/files/information.dmgs
> Proceeding with wordlist:/Users/ianboyd/Downloads/john- and rules:Wordlist
> Proceeding with incremental:ASCII

Yes, and this looks reasonable. :-)

Current versions of JtR may also print a message like:

Cost 1 (iteration count) is 234567 for all loaded hashes

Is this not printed for you?  Looks like it is not, which surprises me.

Anyway, you'll want to proceed with that test with a dmg file having a
known weak password.  Not only to verify your procedure (per the above,
it looks correct to me), but also to test software compatibility
(although ideally you'd generate the test dmg file on the same version
of OS X that was used to generate your target dmg file).


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