Re: Renewing certificates with certbot

[ng0@n0.is]

Julien Lepiller transcribed 2.1K bytes:
> Le 2019-03-06 15:19, ng0@n0.is a écrit :
> > Julien Lepiller transcribed 1.6K bytes:
> > > Le 2019-03-06 14:42, Ludovic Courtès a écrit :
> > > > Hi,
> > > >
> > > > Julien Lepiller <julien@lepiller.eu> skribis:
> > > >
> > > > > I use certificates from let's encrypt for my website and mail servers,
> > > > > and found that there was an issue with certificates generated by the
> > > > > certbot service in Guix: the generated private keys are world-readable
> > > > > (in a directory that cannot be accessed by anyone but root, so it's OK
> > > > > I guess). OpenSMTPD is not happy with that though, so I have to chmod
> > > > > the files every time. I came up with a variant of the deploy-hook
> > > > > that's presented in the manual, and I'd like to update the example
> > > > > with it. Here it is:
> > > > >
> > > > > ;; Find running nginx and reload its configuration (for certificates)
> > > > > (define %my-deploy-hook
> > > > >   (program-file
> > > > >    "my-deploy-hook"
> > > > >    #~(let* ((pid (call-with-input-file "/var/run/nginx/pid" read))
> > > > >             (cert-dir (getenv "RENEWED_LINEAGE"))
> > > > >             (privkey (string-append cert-dir "/privkey.pem")))
> > > > >        ;; certbot private keys are world-readable by default, and
> > > > > smtpd complains
> > > > >        ;; about that, refusing to start otherwise
> > > > >        (chmod privkey #o600)
> > > > >        (kill pid SIGHUP))))
> > > > >
> > > > > What do you think?
> > > >
> > > > It sounds like a serious issue that private keys are world-readable.  Is
> > > > it a bug on our side or in Certbot?  I think we should fix it so that
> > 
> > It's a certbot default, on all all systems.
> 
> Actually, reading https://github.com/certbot/certbot/issues/1473 suggests
> it's not the case anymore. I was probably running an older version
> of certbot.

Thanks for pointing me to this, I wasn't aware of this
 
> > 
> > > > they are never world-readable, rather than document how to work around
> > > > the bug.
> > > >
> > > > WDYT?
> > > >
> > > > Thanks,
> > > > Ludo’.
> > > 
> > > I don't think this is an issue: the file is world-readable, but the
> > > directory
> > > it's in is not accessible to anyone but root. OpenSMTPD still
> > > complains,
> > > but I think there's no security issue.
> > > 
> > > 
> 
>