[XAD] Re: Security Identifier (SID) to User Identifier (uid) ResolutionSystem
Nicolas.Williams at wdr.com
Wed Dec 29 16:47:01 GMT 1999
On Wed, Dec 29, 1999 at 12:24:49PM +1100, Luke Howard wrote:
> I had always thought an algorithmic mapping between NT and UNIX
> identifiers was the Way To Go from an administrative perspective
> until I spoke to people who managed existing deployments, where
> uids and SIDs had already been allocated. At least with a single
> directory, you can put the identifiers in the same place.
> That said, I still believe an algorithmic mapping is a good
> idea for deployments that want it (for example, deployments with
> a minimal UNIX infrastructure, or a minimal NT one). The mapping
> logic could be in a number of places: in SAMBA, in an NSS module
> for UNIX, or in the directory server itself.
Yes, yes. Though you can't currently put the mapping logic into an NSS
module as there is no standard get*by*() API that involves SIDs (you can
make reference to SIDs internally, but you can't have those functions
take a SID as an argument or return SID information).
The directory is a good place to put either or both express mappings and
logical mappings. This is why Samba could use a little API so others can
provide it with modules to make these lookups via a directory.
Still, the uid/gid->local SID mapping Samba fileservers implement now is
not bad. There is no urgency to implement such an API. Though I bet Luke
would rush to it if given the go ahead :)
> -- Luke
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