On Thu, Aug 15, 2019, at 4:20 AM, Sumit Bose wrote:
> On Tue, Aug 13, 2019 at 02:05:06PM -0400, James Cassell wrote:
> > Good afternoon,
> > 
> > I'm working on a migration from Centrify to SSSD with Active Directory. 
> > Everything works quite well except for one item. Centrify has a feature to 
> > request a certificate from the AD CA that is automatically granted, given 
> > the AD credentials. This is used for wired 802.1x authentication, among 
> > other things.
> > 
> > Is there a way to get an AD cert via SSSD or related tools such as adcli?  
> > (Centrify calls this command 'adcert'.)
> 
> Hi,
> 
> it looks like AD CS with NDES can support SCEP
> (https://tools.ietf.org/html/draft-gutmann-scep-14). Please see
> https://blogs.technet.microsoft.com/jeffbutte/2016/12/16/236/ for
> details.
> 

Thanks for the links!  I did take a look at those.  It looks like certmonger 
even supports the same scep protocol, but it seems that it requires a one-time 
PIN to register, which is an out-of-band manual process as far as I can tell.  
Red Hat even has some docs on it: 
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system-level_authentication_guide/certmonger-scep

Seems like it would be convenient to have the one-time challengePassword (as 
it's called in the spec) be (derived from) an appropriate kerberos service 
ticket, (but that's just conjecture.)  Somehow, this "just works" on Windows 
hosts with the auto-enrollment AD policy (as also with Centrify on Linux), but 
I don't know how; it could be (a variation on) scep for all I know.

Thanks for taking a look!


V/r,
James Cassell


> HTH
> 
> bye,
> Sumit
> 
> > 
> > Thanks in advance!
> > 
> > 
> > V/r,
> > James Cassell
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