Groups > linux.debian.user > #198275

Re: luks, crypttab: why 3 partition only 2 passphrases entered

From	Carles Pina i Estany <carles@pina.cat>
Newsgroups	linux.debian.user
Subject	Re: luks, crypttab: why 3 partition only 2 passphrases entered
Date	2018-08-05 00:50 +0200
Message-ID	<wjdwZ-6qB-5@gated-at.bofh.it> (permalink)
References	(1 earlier) <wiaBb-Hr-3@gated-at.bofh.it> <wifUe-4d5-5@gated-at.bofh.it> <wj8xj-3oX-1@gated-at.bofh.it> <wjb29-51E-3@gated-at.bofh.it> <wjd3X-6fu-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

Hi,

On Aug/04/2018, David Christensen wrote:

> On 08/04/2018 02:54 PM, Carles Pina i Estany wrote:
> > And I'm now 99% sure that the culprit of all this confusion is...
> > plymouth! It has a password caching facility and systemd seems to use
> > it to get the cached password.
> 
> You seem to have found complexities above dm-crypt.  I know very little
> about systemd or the various desktop environments, so I'll wish you good
> luck in pursuing answers to your questions.

I've just confirmed it. In plymouth, file src/ply-boot-server.c, I've
added the ply_trace line:
                        ply_buffer_append_bytes (buffer,
                                                 password,
                                                 strlen (password) + 1);
                        ply_trace("Carles password: %s", password);

Then I can see in the Debug logs the previously entered passwords when systemd
requests them (which then systemd uses them to decypher the partition and add
the correct one in the Linux keyring, etc. etc.).

Thanks for all the help and checks,

-- 
Carles Pina i Estany
	Web: http://pinux.info || Blog: http://pintant.cat
	GPG Key 0x8CD5C157

Thread

luks, crypttab: why 3 partition only 2 passphrases entered Carles Pina i Estany <carles@pina.cat> - 2018-08-02 01:00 +0200
  Re: luks, crypttab: why 3 partition only 2 passphrases entered Matthew Crews <mailinglists@mattcrews.com> - 2018-08-02 03:10 +0200
    Re: luks, crypttab: why 3 partition only 2 passphrases entered Carles Pina i Estany <carles@pina.cat> - 2018-08-02 09:20 +0200
    Re: luks, crypttab: why 3 partition only 2 passphrases entered Jonathan Dowland <jmtd@debian.org> - 2018-08-07 13:20 +0200
  Re: luks, crypttab: why 3 partition only 2 passphrases entered David Christensen <dpchrist@holgerdanske.com> - 2018-08-02 03:30 +0200
    Re: luks, crypttab: why 3 partition only 2 passphrases entered Carles Pina i Estany <carles@pina.cat> - 2018-08-02 09:10 +0200
      Re: luks, crypttab: why 3 partition only 2 passphrases entered David Christensen <dpchrist@holgerdanske.com> - 2018-08-04 19:30 +0200
        Re: luks, crypttab: why 3 partition only 2 passphrases entered Carles Pina i Estany <carles@pina.cat> - 2018-08-04 22:10 +0200
          Re: luks, crypttab: why 3 partition only 2 passphrases entered David Christensen <dpchrist@holgerdanske.com> - 2018-08-05 00:20 +0200
            Re: luks, crypttab: why 3 partition only 2 passphrases entered Carles Pina i Estany <carles@pina.cat> - 2018-08-05 00:50 +0200
    Re: luks, crypttab: why 3 partition only 2 passphrases entered Carles Pina i Estany <carles@pina.cat> - 2018-08-03 00:50 +0200
      Re: luks, crypttab: why 3 partition only 2 passphrases entered deloptes <deloptes@gmail.com> - 2018-08-03 10:10 +0200
      Re: luks, crypttab: why 3 partition only 2 passphrases entered Carles Pina i Estany <carles@pina.cat> - 2018-08-05 00:00 +0200
        Re: luks, crypttab: why 3 partition only 2 passphrases entered Jonathan Dowland <jmtd@debian.org> - 2018-08-07 13:20 +0200
          Re: luks, crypttab: why 3 partition only 2 passphrases entered Carles Pina i Estany <carles@pina.cat> - 2018-08-08 00:20 +0200
            Re: luks, crypttab: why 3 partition only 2 passphrases entered Jonathan Dowland <jmtd@debian.org> - 2018-08-08 10:00 +0200
              Re: luks, crypttab: why 3 partition only 2 passphrases entered Celejar <celejar@gmail.com> - 2018-08-08 14:10 +0200

csiph-web