tsugi/LTI validation error

Hello,

I just installed tsugi in a xot app v3.8.5 with php 7.3.11, also the tsugi patch has been applied. In XOT everything looks fine. The url, key and secret are generated normally in the properties window for a given course. The data are also stored in the tsugi tables. When the url is tested in gnomio or tsugi it's displaying the following error:

"Could not establish context: Invalid signature ours= Rqvim8y0UJzg1rUGe4wXT6lLgEItPB5RJ2wqsGcIaAY= yours=jO03iJMGWN9h1HXk8xpSDQdyIt/YtroKWAsJ2HVGqPA="

or

"Detail: OAuth validation fail key=CFSWHMISO548 delta=11 error=Invalid signature ours= Rqvim8y0UJzg1rUGe4wXT6lLgEItPB5RJ2wqsGcIaAY= yours=jO03iJMGWN9h1HXk8xpSDQdyIt/YtroKWAsJ2HVGqPA="

I double checked to ensure the data has been input exactly the same as in the xot properties window.

I tested with different courses, changing key and secret manually and checking/uncheking the SHA256 option in tsugi tools without success.

I would like to know if someone in this group have faced that kind of problems and if was able to resolve it.

Thanks in advance for your help,

Javier Martinez

Which version of Tsugi did you install? So far I've used 0.50 but I know there were some changes in the summer. I have not tried the latest version yet.

Hi Tom,
I'm using v0.6.0 LTI 1.3 MVP Jun 15, 2019. I see they just release a new version 0.70 August 2020.
So, do you think I should give a try to v0.5.0, which is the version that has been tested in XOT?
Thanks.

Let me have a go with the 0.6 version again (just to verify). I have used that version with success as well. That one should definitely work.

Hi Tom,
I just reinstalled Tsugi v0.5.0 and it's working now in my testing environments (tsugi tools and gnomio.com).
Thanks for pointing me in the right direction,
Javier

Thank you for letting me know. I'll investigate why later Tsugi's do seem to have issues.