From: Theo Buehler <tb@theobuehler.org>
Subject: Re: anonymous gotsh user's password entry and security(8)
To: Lucas <lucas@sexy.is>
Cc: Alexander Arkhipov <aa@manpager.net>, gameoftrees@openbsd.org
Date: Thu, 15 Jun 2023 00:46:46 +0200

On Wed, Jun 14, 2023 at 05:06:00PM +0000, Lucas wrote:
> Theo Buehler <tb@theobuehler.org> wrote:
> > On Wed, Jun 14, 2023 at 06:24:00PM +0200, Stefan Sperling wrote:
> > > On Wed, Jun 14, 2023 at 05:39:28PM +0300, Alexander Arkhipov wrote:
> > > > Sorry if that's been asked before: I've read the gotd(8), gotsh(1) and
> > > > got.conf(5) man pages, and searched through the list, but can't find the
> > > > information.
> > > > 
> > > > I have anonymous gotd set up on an OpenBSD box. The password entry looks
> > > > like this:
> > > > 
> > > > anon::1006:1006::0:0:Anon:/var/empty:/usr/local/bin/gotsh
> > > > 
> > > > However, I get daily messages to my mail like so:
> > > > 
> > > > > Running security(8):
> > > > > 
> > > > > Checking the /etc/master.passwd file:
> > > > > Login anon has no password.
> > > > 
> > > > I have also read security(8), and the script /usr/libexec/security
> > > > itself. It seems that an exception is only ever made for the user
> > > > anoncvs running anoncvssh.
> > > > 
> > > > 		nag $pwd eq '' && !($name eq 'anoncvs' &&
> > > > 				    $shell =~ /\/anoncvssh$/),
> > > > 		    "Login $name has no password.";
> > > > 
> > > > So, is there something special I need to do to get rid of these
> > > > messages? Do I just make an ad-hoc modification of the script and wait
> > > > for better times?
> > > 
> > > For now, either ignore the message or tweak the script. I don't know if
> > > a patch to security(8) to remove this message for gotsh(1) in a similar
> > > way would be accepted. Probably not at this stage.
> > 
> > I thought setting the password field to '*************' (13 stars) was
> > one way of silencing this warning. One of useradd or adduser does this
> > and the security script has a "length $pwd != 13" exemption for that
> > reason.
> 
> That's partially correct. However, that only works as long as there is
> an alternative login method (an SSH key, for example), but for anongot,
> you need a passwordless user.

Right, the 13 stars don't work in that situation. However, using an
empty password does seem to work although I haven't tested it with gotsh:

$ encrypt ''