I am experimenting with LimeSurvey SAML authentication, based on the plugin found here:
github.com/pitbulk/limesurvey-saml .

Everything seems to be working just fine, users gets created in the database etc. but Yii loses the identity of the user right after the login. In particular: Yii::app()->user->getId() returns nothing after the final redirect to AdminController.

This causes LimeSurvey to redirect back and forth, indefinitely, between the AdminController (application/controllers/AdminController) and the authentication action (application/controllers/admin/authentication).

Any hints much appreciated,
Sandor

Why not create an issue in github ?

Because it looks like 'issues' have been disabled for the LimeSurvey repository on Github?
Unlike my own repositories, the LimeSurvey repository does not seem to have an 'issues' tab...

The LimeSurvey github page is lacking the issue tab.
As far as I see the code is from someone else.
What do you get here:
github.com/pitbulk/limesurvey-saml/issues

Good to get confirmation on the missing 'issues' tab, thought it could be my account.I have just created an issue on the SAML plugin repository, over at Github. Hope it helps, it's unfortunate to have a plugin working at 90-95%.

I have to work on SAML in some week … maybe i get the plugin maintenance at same time.

That would be very nice. I noticed that the behaviour of the plugin has changed since a comfort upgrade.
Time permitting, I'll try and analyse the issue further.

@DenisChenu: how to get in touch?

Note the last couple of lines here simplesamlphp.org/docs/stable/simplesamlphp-sp#section_6
about php, simple saml and sessions. Sounds like it could be very relevant...