[Samba] SIDs and UIDs and RIDs - Oh My!

[Ilia Chipitsine]

> On Sat, Aug 13, 2005 at 05:00:16PM -0700, Moondance Foxmarnick wrote:
>>
>> But what the @$@! is a Relative IDentifier (RID)?!?
>>
>> On page 153 the command to map a windows group to a *nix group - no mention
>> of RIDs.
>
> A SID is a 128 bit identifier of a user/group/computer on a network
> (a GUUID really). It consists of a 96-bit "domain" id, with a 32-bit
> "relative id" (RID) suffix.

Official Samba3 Howto is certanly missing such a clear definition :-)

I would expand user/group/computer to 
user/group/computer/domain/interdomaintrust/etc :-)

Every instance in SMB world has to have its own SID

>
> So for a given RID, you prepend the 96-bit domain id to get the full
> SID.
>
> SIDs are supposed to be "structured", but for real users/groups
> and computers they are of the form described above.
>
> Certain (less than 128 bit) SIDs are "well known" SIDs. Such as
> the "Administrators" group.
>
> Jeremy.
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