[Freeipa-users] Jenkins integration?

[Alexander Bokovoy]

On pe, 24 maalis 2017, Maciej Drobniuch wrote:
>Hi All,
>
>I'm trying to integrate Freeipa with jenkins and ldap auth plugin.
>
>The thing with the Freeipa LDAP server is:
>* Only Directory Manager can read userPassword field (not sure yet how to
>create a sysaccount which can read the field. ldifs are welcome ;)
This is absolutely not needed. You should configure Jenkins to perform
LDAP bind with user password against IPA LDAP server, that's all. This
is supported by acegi security framework that Jenkins LDAP plugin is
using. For example,
https://github.com/jenkinsci/ldap-plugin/blob/master/src/main/resources/hudson/security/LDAPBindSecurityRealm.groovy
actually uses
org.acegisecurity.providers.ldap.authenticator.BindAuthenticator2 which
does support normal LDAP bind.

I think it is, in fact, a default setup for Jenkins LDAP auth plugin, so
you actually needed to do something to disable this path.


>* The userPassword field contains the password in salted SHA (SSHA) format.
>From what I've observed the standard LDAP auth functions do not do the SSHA
>or any other type of calculations. The password is compared to the plain
>text that's usually(in a typical OpenLDAP server) stored in the
>userPassword field(correct me if I'm wrong)
>* I've managed to integrate CACTI with freeipa by base64 decoding the
>userPassword field then calculating the salted hash and comparing to the
>userPassword field. (php code modification was required).
>* I think the only way is to modify the jenkins LDAP plugin (?).
>
>The problem:
>* I don't want to use sssd PAM because we have OTP enabled and that would
>annoy users(?) additionally it's causing some unidentified build issues
>BTW> Can I disable OTP per server?
>* I can not integrate Kerberos/GSSAPI/SPNEGO because the PCs are not
>connected to the principal(no control over them yet)
>* I want simple LDAP auth ;-)
So use simple LDAP bind.

>
>Ideas & suggestions are welcome!
>
>M.
>
>On Sat, Feb 11, 2017 at 4:28 PM, Michael Ströder <michael at stroeder.com>
>wrote:
>
>> Alexander Bokovoy wrote:
>> > On la, 11 helmi 2017, Michael Ströder wrote:
>> >> Alexander Bokovoy wrote:
>> >>> On la, 11 helmi 2017, Harald Dunkel wrote:
>> >>>> On 02/11/17 11:57, Alexander Bokovoy wrote:
>> >>>>> On la, 11 helmi 2017, Michael Ströder wrote:
>> >>>>>>
>> >>>>>> (Personally I'd avoid going through PAM.)
>> >>>>> Any specific reason for not using pam_sss? Remember, with SSSD
>> involved
>> >>>>> you get also authentication for trusted users from Active Directory
>> >>>>> realms. You don't get that with generic LDAP way. Also, you'd be more
>> >>>>> efficient in terms of utilising LDAP connections.
>> >>>>>
>> >>>>
>> >>>> I would prefer if the users are not allowed to login into a
>> >>>> shell on the Jenkins server. Surely this restriction can be
>> >>>> implemented with pam as well.
>> >>>
>> >>> Yes, you can use HBAC rules to prevent them from access to the host.
>> >>
>> >> But this introduces a hard dependency on host system administration
>> which I personally
>> >> always try to avoid.
>> >>
>> >> As said: Your mileage may vary.
>> >
>> > So we are talking about FreeIPA and a system enrolled to FreeIPA. This
>> > system is already managed in FreeIPA.
>>
>> Please don't get me wrong. Of course I assume that the original poster
>> wants to integrate
>> Jenkins with FreeIPA and make use of users and their group membership
>> already maintained
>> therein.
>>
>> Let's further assume that the service (here Jenkins) might be operated by
>> another team
>> than the system - not so unusual case at my customers' sites - relying on
>> defining HBAC
>> rules for the system's sssd might not be feasible.
>>
>> > Your mileage may vary, indeed, but I'd rather re-use what is available
>> > to you than implement a parallel infrastructure, including reliability
>> > aspects.
>>
>> Of course we both agree on the benefits of using what's already available.
>>
>> > Anyway, I think we are distancing away from the original topic.
>>
>> Especially since we both can only make rough assumptions about
>> requirements and
>> operational constraints of the original poster.
>>
>> Ciao, Michael.
>>
>>
>> --
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>> Go to http://freeipa.org for more info on the project
>>
>
>
>
>-- 
>Best regards
>
>Maciej Drobniuch
>Network Security Engineer
>Collective-Sense,LLC

-- 
/ Alexander Bokovoy