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Message-ID: <20210928131128.GA31631@openwall.com>
Date: Tue, 28 Sep 2021 15:11:28 +0200
From: Solar Designer <solar@...nwall.com>
To: Ben Calegari <bencalegari@...il.com>
Cc: john-users@...ts.openwall.com
Subject: Re: Cracking CSR Private Key
On Sun, Sep 26, 2021 at 02:14:40PM +0200, Solar Designer wrote:
> On Wed, Sep 22, 2021 at 12:19:00AM -0400, Ben Calegari wrote:
> > I'm having trouble cracking a key I created in the following way:
> >
> > openssl req -newkey rsa:2048 -keyout keynamehere.key -out csrnamehere.key
> >
> > I don't see a corresponding xxx2john utility to convert this sort of key to
> > a hash that john can understand. Is it impossible or am I just missing
> > something?
>
> The corresponding utility is pem2john.py.
This works for keys generated by OpenSSL up to 1.0.2* inclusive.
However, it turns out that we have a shortcoming preventing cracking of
keys generated by OpenSSL 1.1+. We're tracking this issue here:
https://github.com/openwall/john/issues/4834
> Maybe we need to improve openssl2john.py so that it would redirect
> people to pem2john.py (at least) when its input looks like PEM. Would
> that have helped you?
Jannik Vieten has just implemented this here:
https://github.com/openwall/john/pull/4835
Alexander
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