Re: [Freeipa-users] how to allow a remote realm user to be an IPA admin?

2012-12-10 Thread Simo Sorce
On Mon, 2012-12-10 at 14:25 +0200, Alexander Bokovoy wrote:
> On Sun, 09 Dec 2012, Brian Cook wrote:
> >How do you let a remote user be an admin for IPA?
> You cannot do it, at least right now.
> 
> >
> >I followed the fedora group example
> >
> >external group:ad_admins_external
> >Posix Group: ad_admins
> >
> >Then I made ad_admins a group member of ipa group 'admins' -
> >theoretically now MSAD\Administrator is an IPA admin?  I get the
> >following.  How does this work?
> 
> Being able to perform IPA management operations means being able to bind
> to IPA LDAP with the identity in question. For Kerberos authentication
> LDAP server maps user principal to a DN of an object in LDAP.
> 
> In case of trust users there are no LDAP objects that they represent
> since the whole idea of a trust was to avoid replicating objects between
> the realms, so while IPA KDC accepts AD realm's tickets for the users,
> IPA LDAP server doesn't know what they map to in terms of LDAP objects.
> 
> Thus, trust users cannot be used to bind for LDAP access.

Note that this[1] DS tickeet needs to be implemented for us to be able,
at some point to create a fallback mapping so we can map foreign user to
a 'role' object in DS. This way we will be able to properly authorize
remote users to operate on freeipa, even as admins at some point as long
as we can map them to an object role based on a SAL mapping.

This will take a while though. For the moment you need a real FreeIPA
user to manage freeipa, you can think of foreign uses as 'guests' atm.

Simo.


[1] https://fedorahosted.org/389/ticket/534

-- 
Simo Sorce * Red Hat, Inc * New York

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Re: [Freeipa-users] how to allow a remote realm user to be an IPA admin?

2012-12-10 Thread Alexander Bokovoy

On Sun, 09 Dec 2012, Brian Cook wrote:

How do you let a remote user be an admin for IPA?

You cannot do it, at least right now.



I followed the fedora group example

external group:ad_admins_external
Posix Group: ad_admins

Then I made ad_admins a group member of ipa group 'admins' -
theoretically now MSAD\Administrator is an IPA admin?  I get the
following.  How does this work?


Being able to perform IPA management operations means being able to bind
to IPA LDAP with the identity in question. For Kerberos authentication
LDAP server maps user principal to a DN of an object in LDAP.

In case of trust users there are no LDAP objects that they represent
since the whole idea of a trust was to avoid replicating objects between
the realms, so while IPA KDC accepts AD realm's tickets for the users,
IPA LDAP server doesn't know what they map to in terms of LDAP objects.

Thus, trust users cannot be used to bind for LDAP access.


sh-4.1$ ipa user-add
ipa: ERROR: Could not create log_dir u'/home/msad.test/administrator/.ipa/log'
First name: joe
Last name: blo
User login [jblo]:
ipa: ERROR: Insufficient access: SASL(-14): authorization failure: Invalid 
credentials

At this step IPA server code you are talking to attempts to bind to LDAP server
on your (administra...@msad.test) behalf. LDAP server cannot map
administra...@msad.test to an existing DN, thus a failure is raised.

Since access controls in 389-ds LDAP server are built around DNs of
existing objects, you need to be able to map these ephemeral users to
some existing objects first to allow them to bind to LDAP. We haven't
done that yet but may at some point in future consider adding sort of
ephemeral bind support. It is unclear how to do it properly, considering
all security implications.

--
/ Alexander Bokovoy

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[Freeipa-users] how to allow a remote realm user to be an IPA admin?

2012-12-09 Thread Brian Cook
How do you let a remote user be an admin for IPA?

I followed the fedora group example

external group:ad_admins_external
Posix Group: ad_admins

Then I made ad_admins a group member of ipa group 'admins' - theoretically now 
MSAD\Administrator is an IPA admin?  I get the following.  How does this work?

Thanks,
Brian




sh-4.1$ kinit administra...@msad.test
Password for administra...@msad.test: 
sh-4.1$ klist
Ticket cache: FILE:/tmp/krb5cc_1653800500
Default principal: administra...@msad.test

Valid starting ExpiresService principal
12/09/12 22:34:43  12/10/12 08:35:09  krbtgt/msad.t...@msad.test
renew until 12/10/12 22:34:43
sh-4.1$ 
sh-4.1$ kinit administra...@msad.test^C
sh-4.1$ 
sh-4.1$ ipa user-add
ipa: ERROR: Could not create log_dir u'/home/msad.test/administrator/.ipa/log'
First name: joe
Last name: blo
User login [jblo]: 
ipa: ERROR: Insufficient access: SASL(-14): authorization failure: Invalid 
credentials
sh-4.1$ klist
Ticket cache: FILE:/tmp/krb5cc_1653800500
Default principal: administra...@msad.test

Valid starting ExpiresService principal
12/09/12 22:34:43  12/10/12 08:35:09  krbtgt/msad.t...@msad.test
renew until 12/10/12 22:34:43
12/09/12 22:35:31  12/10/12 08:35:09  krbtgt/ipa.t...@msad.test
renew until 12/10/12 22:34:43
12/09/12 22:35:09  12/10/12 08:35:09  HTTP/ipa1.ipa.t...@ipa.test
renew until 12/10/12 22:34:43
sh-4.1$ 


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