PROXY tickets and GSSAPI

Nicolas Williams Nicolas.Williams at
Thu Jun 27 10:20:01 EDT 2002

On Wed, Jun 26, 2002 at 04:55:52PM -0500, Douglas E. Engert wrote:
> The problem is the GSSPAI only has a single delegte flag, which is used 
> for delegting a TGT. which is also forwardable.  
> The GSSAPi extensions we are proposing at the GGF next month might address
> this problem, by allowing more input to the GSS delegtion process, including
> delegation at any time.

Unless the GGF extensions also include new GSS messages/APIs for
delegating credentials without re-authenticating (i.e., using a sec
context that is established and un-expired) then proxy tickets will
remain useless.

Ideally a message/API would also be specified by which an acceptor can
ask an initiator, on demand, to delegate more creds.

But then you get into other issues, such as: noone will be able to use
such new messages without re-specifying the way their protocols use GSS.

GSS was never meant (apparently) to provide session framing - it will be
difficult to intorudce that now (particularly when SSHv2 and TLS both
provide some of that, SSHv2 being rather comprehensive).


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