[Freeipa-devel] [PATCH] 0513 Add managed read permissions to RBAC objects

Martin Kosek mkosek at redhat.com
Fri Apr 11 08:20:36 UTC 2014

On 04/10/2014 05:03 PM, Petr Viktorin wrote:
> On 04/10/2014 03:20 PM, Martin Kosek wrote:
>> On 04/10/2014 03:10 PM, Petr Viktorin wrote:
>>> On 04/10/2014 03:07 PM, Martin Kosek wrote:
>>>> On 04/10/2014 03:02 PM, Petr Viktorin wrote:
>>>>> On 04/10/2014 02:58 PM, Martin Kosek wrote:
>>>>>> On 04/10/2014 01:46 PM, Petr Viktorin wrote:
>>>>>>> On 04/09/2014 05:17 PM, Martin Kosek wrote:
>>>>>>>> On 04/09/2014 04:54 PM, Petr Viktorin wrote:
>>>>>>>>> The meta-permissions.
>>>>>>>> :-)
>>>>>>>>> Read access is given to all authenticated users. Reading membership info
>>>>>>>>> (i.e.
>>>>>>>>> privileges) is split into a separate permission.
>>>>>>>>> Another permission is added that allows read access to all ACIs.
>>>>>>>>> If we don't want to open that up for everyone, I could limit this to only
>>>>>>>>> ACIs
>>>>>>>>> containing "permission:". (Since old-style permissions store their
>>>>>>>>> information
>>>>>>>>> in ACIs, their ACIs need to be readable.)
>>>>>>>> If I read the notes from our DevConf discussion correctly, there are some
>>>>>>>> inconsistencies:
>>>>>>>> 1) We decided to not do special membership permission for
>>>>>>>> permission/privilege/role permissions.
>>>>>>>> 2) We decided to give read access to permissions, privileges and roles
>>>>>>>> only to
>>>>>>>> member of a certain privilege. Is there any reason to not do that? IMO,
>>>>>>>> regular
>>>>>>>> users do not need to be able to read the permission/privilege/role
>>>>>>>> configuration of a FreeIPA installation to use it for IdM.
>>>>>>>> Martin
>>>>>>> Updated. I plan to add all the RBAC-related read permissions to a single
>>>>>>> privilege, "RBAC Readers". Or do we want more granularity by default?
>>>>>>> Requires my patch 0514.
>>>>>> I was looking at the granularity we currently have with privilege and it is
>>>>>> mostly per FreeIPA function (Sudo Administrator or DNS Administrator),
>>>>>> not per
>>>>>> IPA object (Sudo Command Administrator, Sudo Rule Administrator).
>>>>>> I would thus follow the same principle with RBAC and create RBAC
>>>>>> Administrator
>>>>>> privilege which will cover read permissions for... permissions... privileges
>>>>>> and roles. In time, we will also add new write privileges there as they are
>>>>>> currently missing.
>>>>>> To sum it up, the patch works, I would just change the name of the privilege
>>>>>> and not focus it just on reading.
>>>>> So to confirm, we want one privilege to cover both reading and writing?
>>>> IMO, yes.
>>>>> Should I add new read permissions to existing "Administrator" privileges
>>>>> only,
>>>>> instead of creating new "Reader" permissions?
>>>> I don't think so. The read permission we have been adding so far were
>>>> targetted
>>>> on anonymous/all binds, thus according to our design, they cannot be added to
>>>> privilege anyway.
>>>> But if someone wants to restrict an object, he is free to change the
>>>> permission
>>>> bind type to "group based" and assign it to a privilege.
>>>> In our case, I would assign read permission to privilege only if we decided to
>>>> make them group based, like RBAC or krbtpolicy ones.
>>> Right, that makes sense. I'm asking about not having separate read privileges
>>> when the permissions are group based. Based on Simo's other mail we should have
>>> separate "Read" privileges.
>>> Also IMO the read permissions should then be added both to the "Reader" and
>>> "Administrator" privileges, since it doesn't make sense to be able to write but
>>> not read.
>> Ah, I understand the question now. This assumes that people may often want to
>> allow a certain group of people to read RBAC or to read ticket policy.
>> I would assume that a more frequent usage would be that administrator would
>> allow all authenticated users read an object (which makes Read group
>> redundant). But I am not insisting, I am open to both approaches.
> I think it's reasonable to give read (but not write) access to lower-level
> admins only.
> Here is an updated patch. I've added read for privileges and roles too, so the
> 'RBAC Readers' privilege should be complete.

Thanks, works for me.

ACK. Pushed to master.


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