openssh unix dev - Mar 2002 - GSSAPI/Kerberos support in OpenSSH 3.1p1

I've now completed updating my patches for GSSAPI in protocol v2 to
OpenSSH 3.1p1
See http://www.sxw.org.uk/computing/patches/openssh.html

As previously, you will need to apply the protocol v1 krb5 patch
before the GSSAPI one, and run autoreconf from an autoconf later
than 2.52

There are a number of improvements and minor bug fixes over previous
patches. However, due to protocol changes this patch will not interoperate
with my GSSAPI patches to 2.9p2 and earlier.

This patch is conditionally compliant with
draft-ietf-secsh-gsskeyex-03.txt. It does not currently implement GSSAPI
secured host key exchange, or the optional GSSAPI error message passing

Thanks to all those who have emailed me asking when this would be
available, and to all those who have contributed patches and code reviews.
The list on is on the web page!

Cheers,

Simon.

A thought occurs: have the client attempt to automatically initiate
re-keying when the GSS context is due to expire or, if expired, every
few minutes.

Let me be more specific.

The way SSH gsskeyex works GSS context expiration is unimportant, but
GSS context expiration is a clue on a tip as to when forwarded
credentials expire. It would be useful if credentials were re-forwarded
automatically when refreshed. The way one re-forwards GSS credentials
with SSH gsskeyex is by re-keying the session.

The client can find out from gss_init_sec_context() when the context
and any forwarded credentials, will expire. The client can check, when
the time comes, and periodically thereafter, if new credentials are
available, and if so, re-key the SSH session.

To make this happen would require a hook in the client loop (but NOT a
select() timeout).

This way one need only kinit in one place and tickets will eventually be
re-forwarded automatically.

Is there any interest in such a feature? Advice?

Cheers,

Nico


On Thu, Mar 21, 2002 at 10:29:35PM +0000, Simon Wilkinson
wrote:
> 
> I've now completed updating my patches for GSSAPI in protocol v2 to
> OpenSSH 3.1p1
> See http://www.sxw.org.uk/computing/patches/openssh.html
> 
> Cheers,
> 
> Simon.
> 
> _______________________________________________
> openssh-unix-dev at mindrot.org mailing list
> http://www.mindrot.org/mailman/listinfo/openssh-unix-dev
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