[rt-users] RT and SSO with SAML

Ruslan Zakirov ruz at bestpractical.com
Tue Jun 18 08:58:02 EDT 2013

On Tue, Jun 18, 2013 at 4:38 PM, L B <bertignac at gmail.com> wrote:

> Hi,
> The goal here is to have SSO on RT between a local user directory (AD) and
> an RT instance installed in the amazon cloud.
> I've setup mod_mellon ( https://code.google.com/p/modmellon/ ) with RT as
> a relying party on AWS  and it works well, I'm able to log in with SSO (IdP
> used on premise is ADFS).
> I just had to configure RT with:
> Set($WebExternalAuth , 1);
> Set($WebFallbackToInternalAuth , 1);
> Set($WebExternalAuto , 1);
> so it uses the REMOTE_USER variable to login.
> I have three problems now:
> - populating users info:
>  I think I can get some environment variables out of the SAML token with
> mod_mellon configuration like this:
>  MellonSetEnv "e-mail" "mail"
>  But then I don't know how to populate this into RT.

1) With code. Grep for REMOTE_USER in RT source code and you'll find places
where you can inject code to extract information mellon puts into ENV and
put it into RT's tables. As far I recall remote user variable handled in
one or two places.

2) No coding - use ExternalAuth module to extract info. It can work this
way - info extraction only mode without auth. Info is updated on login into

3) No coding - use LDAPImport to bring in users' data. Info is updated as
often as you run the script.

> - logout waits 1 second (default), and go back to login page, so I'm
> authenticated again. I think I need to change the logout link in the code?

Yes. Very specific to setup, so there is no direct solution that works for

> - SSO is always used and I'd like a way to do a local login (with root for
> example which is not in our user directory). I'm not sure how to do this
> yet.

Host second RT as a virtual host on different URL without SSO. Only people
with passwords in RT's database would be able to use this interface.

> Has anyone played with this and went further than I did?
> Thanks,
> --
> L.B.
> --
> RT Training in Seattle, June 19-20: http://bestpractical.com/training

Best regards, Ruslan.
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