'HANDLE_AUTHDATA' error when trying to setup Kerberos trust between AD and FreeIPA

[Dmitri Pal]

On Mon, Jun 15, 2020 at 2:39 AM Robert Sturrock <rns at unimelb.edu.au> wrote:

> Hi All,
>
> I’m trying to create a (one-way) Kerberos trust between AD and a FreeIPA
> installation, such that user TGTs from AD can be used to access resources
> in the IPA realm.
>
> I followed some (non-IPA related) steps for setting up Kerberos trusts
> between AD and MIT Kerberos - essentially creating a common TGT principal
> in both systems with a common password.  This works to a point (ie. I can
> get the TGT for IPA using the AD TGT), but when I try to fetch a service
> ticket in the IPA domain I get a ‘HANDLE_AUTHDATA’ error.
>

Was there any reason not to follow IPA steps for setting trusts?
They are very straightforward.
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/installing_identity_management/installing-trust-between-idm-and-ad_installing-identity-management



>
> Here is what I’m seeing:
>
>  (AD domain = ‘STAFF.LOCALREALM'; IPA domain = ‘PALLAS.LOCALREALM')
>
>  # Get AD TGT:
>  Password for rns at STAFF.LOCALREALM: XXXXXXXXX
>
>  $ klist
>  Ticket cache: KEYRING:persistent:10846:10846
>  Default principal: rns at STAFF.LOCALREALM
>
>  Valid starting     Expires            Service principal
>  11/06/20 13:34:19  11/06/20 23:34:19
> krbtgt/STAFF.LOCALREALM at STAFF.LOCALREALM
>          renew until 12/06/20 13:34:18
>
>  # Use AD TGT to get an IPA TGT:
>  $ kvno krbtgt/PALLAS.LOCALREALM at STAFF.LOCALREALM
>  krbtgt/PALLAS.LOCALREALM at STAFF.LOCALREALM: kvno = 0
>
>  $ klist
>  Ticket cache: KEYRING:persistent:10846:10846
>  Default principal: rns at STAFF.LOCALREALM
>
>  Valid starting     Expires            Service principal
>  11/06/20 13:34:24  11/06/20 23:34:19
> krbtgt/PALLAS.LOCALREALM at STAFF.LOCALREALM
>          renew until 12/06/20 13:34:18
>  11/06/20 13:34:19  11/06/20 23:34:19
> krbtgt/STAFF.LOCALREALM at STAFF.LOCALREALM
>          renew until 12/06/20 13:34:18
>
>  # Try to fetch an IPA service ticket:
>  $ kvno host/palladium1.localdomain at PALLAS.LOCALREALM
>  kvno: KDC returned error string: HANDLE_AUTHDATA while getting
> credentials for host/palladium1.localdomain at PALLAS.LOCALREALM
>
> Can anyone provide some idea as to what’s going on here and how I resolve
> this?  I don’t really know what ‘HANDLE_AUTHDATA’ indicates and I’m not
> able to find a lot of documentation explaining this.
>
> Thanks!
>
> Robert.
>
> ________________________________________________
> Kerberos mailing list           Kerberos at mit.edu
> https://mailman.mit.edu/mailman/listinfo/kerberos
>


-- 

Thank you,
Dmitri Pal

Director, Software Engineering
Red Hat Enterprise Linux Platform Security and Identity Management
dpal at redhat.com
 <https://red.ht/sig>