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Date: Sun, 11 Aug 2013 14:29:46 +0200
From: magnum <>
Subject: Re: Are BKS/Berkely -Keystores for Java supported yet?

On 11 Aug, 2013, at 11:31 , Sam <> wrote:
> i am currently trying to estimate the security of an android application.
> The certificate which is used quite heavily in the application only is
> available as bks file which can''t be opened without password.
> I am currently tracing this obfuscated application in hope to reveal the
> password used in the code somewhere but as a secondary fallback, i want
> to try bruteforce.
> Therefore my question, is it possible to use JtR for this process yet?

In latest bleeding-jumbo (not released yet) we have a format called "keystore" which is "Java Keystore" but I'm not sure this is what you need. If it is, you'd use it like this:

$ ./keystore2john file.bks >file.john
$ ./john file.john (...)

You can try a snapshot from

If this is not it, I'm sure Dhiru will whip a new format up for you but his away for a week or so.


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