How to test if TGT has expired by using Kerberos API's?

[Luke Howard]

Your program could note when the TGT is due to expire and only attempt
to acquire another TGT after that time.

-- Luke

>From: <Kent_Wu at trendmicro.com>
>Subject: How to test if TGT has expired by using Kerberos API's?
>To: <krbdev at mit.edu>
>Cc: kerberos at mit.edu
>Date: Fri, 6 Jun 2003 17:58:12 -0700
>
>Hi:
>
>	I've written a program to get TGT then do the Kerberos authentication by using GSS-API afterwards but I also want to do
>it in a smarter way. What I tried to achieve is I want to check if it expires or not, if so then I issue a real TGT
>request otherwise I can save a trip. Or if there is an API which already checks this internally that would be even
>greater. By searching some materials I found some possible API's but I don't really know due to the limited documentation.
>Can somebody enlighten me a little bit on this?
>
>	Another way I can think of is always doing gss_init_sec_context() first and if it returns "ticket expired" then I can
>issue a TGT request, just that the first approach sounds more logic to me and I also want to explore Kerberos API a bit
>more.
>
>Thx and have a nice weekend.
>
>Kent
>
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--
Luke Howard | PADL Software Pty Ltd | www.padl.com