[OpenAFS] Multiple tokens on Windows.

[Jeffrey Altman]

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Jan Johansson wrote:

> Jeffrey Altman <jaltman@columbia.edu> wrote:
> 
> Oki, then I think I know what my problem is. Can you please just
> check that I got the facts right.
> 
> As the users login using an external KDC trust the initial
> tickets are stored in the MSLSA.

correct

> afscreds.exe will find and use the TGT from the MSLSA and use
> this to get tokens for the cells specified in the TheseCells
> registry setting.

if you turn on "integrated logon", you can obtain tokens before
the logon session is created thereby allowing you to store roaming
profiles in AFS.

tokens for "ThisCell" and "TheseCells" are automatically obtained by
Integrated logon not by afscreds.exe.

> afscreds.exe will renew tokens as needed finding updated TGTs
> (after user unlocks screen) in MSLSA.

afscreds.exe can renew tokens if it can recognize the relationship
between principal name and service ticket.  This is done by searching
the cache for "afs@REALM" or "afs/cellname@REALM" service tickets.

> I do not need to have leash running.

you do not.

> (The local AFS cell is missing some part of 2b.)

OAFW does not use '2b'.  It uses Krb5 tickets as tokens.  If you
are using Active Directory as your KDC your krb5 tickets can be quite
large and the tickets will be encoded with DES-CBC-MD5.

All OpenAFS servers from 1.2.8 support krb5 tickets up to 344 bytes
and encoded with DES-CBC-CBC.  All OpenAFS servers after 1.3.64 support
tickets up to 14000 bytes and DES-CBC-MD5 encoding.

> The reason I get tokens for central and a login dialog for local
> is that 2b is not working for local.

The OAFW client cannot tell what works or does not work for a particular
cell.  If there are tokens when you logon, then afscreds will not
display a dialog.  Perhaps you are not using integrated logon.

> In UNIX I can workaround the broken 2b by setting 'afs-use-524 =
> local' in krb5.conf there is no such setting in OpenAFS/Kerberos
> for Windows.

All OAFW settings are contained in the registry.   It really is
inappropriate for AFS configuration data to be stored in Kerberos
configuration files.  OAFW does support a 524 option.  (See registry.txt)

Jeffrey Altman


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