[OpenAFS] cross-realm AFS IDs

[Jeffrey Altman]

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The problem you are trying to solve "multiple names from multiple
sources represent the same identity" is being worked on.  I expect
that there will be a cheap and dirty solution available in a future
1.4 release in the next few months plus a more permanent solution
in OpenAFS 2.0.

The quick and dirty solution will provide more than a single realm
which can be considered the same as the local realm with a list of
exclusion names for which you want to continue treatment as a foreign
user.

What site in your situation currently do is require the use of
a modified krb524 daemon that performs name translation.  Public
distribution of these hacks is very much discouraged.

Jeffrey Altman


lamont@scriptkiddie.org wrote:
> 
> It looks like cross-realm AFS IDs are required to have the group ID of
> the cross-realm group (system:authuser@realm) in the lower 16-bits of
> the ID:
> 
> user id & 0x0000ffff = group id
> 
> Does this imply that you only get 16-bits of local IDs and 16-bits for
> each cross-realm realm?
> 
> What would break if you assigned arbitrary AFS IDs to cross-realm users,
> particularly in the <= 0x0000ffff ID space?  What expects to be able to
> take a user id and strip out the group id from it?
> 
> I've got cross-realm users which are in an AD REALM that I want to use
> while keeping my cell principal in an MIT KDC.  Those cross-realm users
> are already in my /etc/passwd file with a globally unique uid that it
> would simply my life greatly if I could use for an AFS ID.  Also, all
> the foreign cells that I'll access will have exactly the same mapping of
> IDs to the AD realm.
> 
> Is there any way around this, or am I stuck with only 16-bits of
> 0xnnnnff2e IDs and the need to use some kind of nss_afs to resolve those
> names with getpwuid()?
> _______________________________________________
> OpenAFS-info mailing list
> OpenAFS-info@openafs.org
> https://lists.openafs.org/mailman/listinfo/openafs-info

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