[Freeipa-devel] [PATCH] 0529 Add managed read permission to trusts

Petr Viktorin pviktori at redhat.com
Tue Apr 22 11:38:44 UTC 2014

On 04/16/2014 05:56 PM, Simo Sorce wrote:
> On Wed, 2014-04-16 at 18:34 +0300, Alexander Bokovoy wrote:
>> On Wed, 16 Apr 2014, Martin Kosek wrote:
>>>>>>>>>>> In general I am not sure all authenticated users need access to all this
>>>>>>>>>>> info. Alexander ?
>>>>>>>>>> SSSD needs to read some of this information for subdomains support.
>>>>>>>>>> That would be at least host/*@REALM who needs to access it.
>>>>>>>>> Can you please list exactly which ones are needed ?
>>>>>>>> SSSD subdomains support needs:
>>>>>>>>    - objectclasses ipaNTTrustedDomain/ipaNTDomainAttrs
>>>>>>>>      - ipaNTFlatName
>>>>>>>>      - ipaNTSecurityIdentifier
>>>>>>>>      - ipaNTTrustedDomainSID
>>>>>>>>      - cn
>>>>>>> Question is - is there any added value in hiding part of the
>>>>>>> trust information from authenticated users? I.e. attributes like
>>>>>>> ipanttrustdirection, ipaNTTrustAttributes (what is the purpose of this
>>>>>>> attribute anyway?), SID blacklists...
>>>>>> Yes. Some of those attributes are needed as internal detail of ipasam --
>>>>>> part of how Samba stores this information taken from specific DCE RPC
>>>>>> structures.
>>>>>>> If yes, we would need to split this permission in 2 and have one for
>>>>>>> authenticated users and one for "Trust Adminitrators" and "Trust Readers".
>>>>>> Yes. Authenticated users shouldn't get any access to those details:
>>>>>>    ipantsupportedencryptiontypes
>>>>>>    ipanttrustattributes
>>>>>>    ipanttrustauthincoming
>>>>>>    ipanttrustauthoutgoing
>>>>> Ok. I assume that "cn=adtrust agents,cn=sysaccounts,SUFFIX" system group should
>>>>> then have this permission assigned so that samba can operate the attributes.
>>>> 'adtrust agents' and 'trust administrators' should have read, modify,
>>>> delete, and search on cn=trusts.
>>> Right. We will probably want to turn most of ACIs in
>>> install/updates/60-trusts.update in managed permissions (i.e. defined in
>>> trust.py) and make "adtrust agents" and "trust admins" it's members.
>> I agree.
> +1
> Simo.

All right. Now I'm replacing the global anonymous read ACI; converting 
the others will come later. The existing agents/admins ACIs grant the 
'read' (or 'all') right already.
ipaIDRange is covered in the range plugin, so what's left for this patch 
is the ipaNTTrustedDomain/ipaNTDomainAttrs attributes.

Does that sound reasonable?


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