[kitten] Checking the transited list of a kerberos ticket in a transitive cross-realm trust situation...

Stefan Metzmacher metze at samba.org
Thu Aug 24 22:29:27 UTC 2017

Am 24.08.2017 um 22:47 schrieb Viktor Dukhovni:
> [ Just kitten, as either not subcribed or subscribed with a different
>   address to some of the other lists. ]
>> On Aug 24, 2017, at 1:36 PM, Simo Sorce <simo at redhat.com> wrote:
>>> We should enforce a PAC always to be present, as we don't support
>>> trusted domains with LSA_TRUST_TYPE_MIT anyway.
>> In samba, yes, but that option can be used in other clients that can
>> connect to multiple types of servers so in case they do not get a PAC
>> the flag should be respected.
> Does the Kerberos library know whether whether the application is going
> to look at PACs and SIDs or just use the client principal name?  I am
> guessing it does not.  Thus in Samba, one might need a dedicated
> krb5.conf configuration file that disables the transit check.  Other
> applications should still apply transit check even if a PAC happens
> to be present, as AFAIK it may well remain unused.

My idea was that Samba would use
gss_set_cred_option(GSS_KRB5_CRED_NO_TRANSIT_CHECK_X) to indicate
the the transited list should not be checked.


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