[Bug 3203] Could default_ccache_name from krb5.conf be used for GSSAPI connections?

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3203

--- Comment #4 from Toby Blake <toby at inf.ed.ac.uk> ---
(In reply to Jakub Jelen from comment #3)
> Hi,
> the current version we use in Fedora lives here so it could have
> gone through some updates and fixes since 2 years ago:
> 
> https://src.fedoraproject.org/rpms/openssh/blob/master/f/openssh-7.
> 7p1-gssapi-new-unique.patch

Hi, this is the patch I've tried to rework for ubuntu.

> The new unique cache in the given collection is probably the most
> sensible way of doing this. Or you suggest that you would like the
> new login to override existing tickets in the ccache? Or you still
> see the ccache in /tmp being used? What configuration did you try?

What I'd like is to be able to set 

[libdefaults]
default_ccache_name = KEYRING:persistent:%{uid}

... in /etc/krb5.conf and for (gssapi) ssh connections to use this, in
the same way that I can set it for PAM connections.

This no doubt works under redhat (and indeed it works for us with
Scientific Linux 7.8 with the addition of a backported
openssh-7.5p1-gss-environment.patch, as discussed in
https://bugzilla.redhat.com/show_bug.cgi?id=1199363)

I think I need to look at the gssapi-new-unique patch again, with a
more complete understanding of the relevant code areas.  My reworking
of it is definitely not doing what it should do.

The biggest issue in getting this working is the divergent code bases
between redhat and ubuntu (in particular, I suspect, the gsskex patch).
 This is why I'd much prefer this issue to be fixed upstream.

Pending that, I'll look again at the the unique patch.

Cheers
Toby

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