The renew=true issue was resolved in 6.3.5.


On Friday, July 2, 2021 at 6:12:12 PM UTC-7 baron wrote:

> My colleague was able to work through this.
>
> He reports that we basically didn't have to call Duo with 5.0 in order to 
> get the ticket back from CAS. We used to submit username and password to 
> the CAS login screen, and the response would be a 302 with a URL that 
> embedded the ticket. No interaction with Duo was required prior to the 
> ticket being returned to the browser.
>
> Now we submit the username and password, get back a form with hidden 
> inputs such as 'execution' and some Duo data in an iframe with the id 
> duo_iframe.  We then have to perform a GET and a POST with that Duo data in 
> order to get back a js_cookie value that's embedded in the response 
> content. We use that js_cookie and data from the duo_iframe, as well as the 
> prior 'execution' input, and resubmit all that to CAS to get back the 302 
> response with the ticket.
>
> Clearly we have Duo MFA enabled for our CAS instance, but this does seem 
> to be a change from how things worked with Duo enabled for 5.0.
>
> It was also noted that the SAML responses differed for samlValidate.
>
> The SAML from CAS5 includes xmlns attributes, e.g.:
>
> <saml1:AttributeValue
>     xmlns:xsd="http://www.w3.org/2001/XMLSchema"; 
>     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
>     xsi:type="xsd:string">
>    uid=testuser
> </saml1:AttributeValue>
>
> Whereas the SAML returned by CAS 6.3 doesn't, e.g.:
>
> <saml1:AttributeValue>
>     uid=testuser
> </saml1:AttributeValue>
>
>
> Finally, there seems to be a bug(?) for CAS 6.3 where SSO doesn't work if 
> your first CAS session has renew=true. If we try this sequence of URLs with 
> CAS 5.0,  it works as expected:
>
> Use a new private/incognito window to test CAS 5.0:
>
>
> https://cas50.example.edu/cas/login?service=https://www.example.com/regression/app1&renew=true
>
> Then:
>
>
> https://cas50.example.edu/cas/login?service=https://www.example.com/regression/app2
>
> Close the prior private window, and use a new private/incognito window to 
> test CAS 6.3:
>
>
> https://cas63.example.edu/cas/login?service=https://www.example.com/regression/app1&renew=true
>
> Then:
>
>
> https://cas63.example.edu/cas/login?service=https://www.example.com/regression/app2
>
> SSO doesn't work for the second URL. The bug seems to have to do with 
> starting with renew=true from the start. If you start without it, it works 
> as expected. Behind the scenes, the renew=true seems to prevent the TGC 
> cookie from being sent.
>
>
>
> On Fri, Jun 25, 2021 at 7:04 AM Baron Fujimoto <[email protected]> wrote:
>
>> Our regression test is a homebrew perl-based thing. With the "real" CAS 
>> client, we see the 302 with location header in the response from the CAS 
>> server, but unfortunately we can't use the same browser dev tools on 
>> our script-based tests. Something must differ though. Looks like we'll have 
>> to put time and effort into closely going over our logs carefully and 
>> examining what we're sending and receiving with our regression test.
>>
>> On Fri, Jun 25, 2021 at 6:24 AM Ray Bon <[email protected]> wrote:
>>
>>> Baron,
>>>
>>> My dev tools show the 302 and location header (with ST) on the POST. We 
>>> do not have any other scripts running
>>>
>>> Do you have any modifications to the log in page or the log in flow?
>>>
>>> Ray
>>>
>>> On Thu, 2021-06-24 at 17:05 -1000, Baron Fujimoto wrote:
>>>
>>> Notice: This message was sent from outside the University of Victoria 
>>> email system. Please be cautious with links and sensitive information. 
>>>
>>> We have another strange issue with our CAS 5.0 to 6.3 upgrade. We have a 
>>> homebrew regression test for 5.0 that parsed the HTML for the service 
>>> ticket from the Location header in a 302 redirect response after 
>>> authentication. E.g.: 
>>>
>>> Location: 
>>> https://casdemo.example.edu/casdemo/login/cas?ticket=ST-2-ujMo86d2pYcEebVDEFzWvAKghxE-cas
>>>
>>> But with our 6.3 instance, we don't seem to see this 302 and Location 
>>> header after authentication from our homebrew test. Nor do the logs show an 
>>> ST being issued after an apparently successful authentication from the 
>>> test. Browser developer tools seem to show a number of scripts being 
>>> executed after authentication via "normal" sample client. Is the missing ST 
>>> perhaps because we don't execute these scripts in our regression test? If 
>>> so, can anyone tell us which script is responsible, or a possible 
>>> workaround?
>>> -- 
>>> Baron Fujimoto <[email protected]> :: UH Information Technology Services
>>> minutas cantorum, minutas balorum, minutas carboratum desendus pantorum
>>>
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>>> <https://groups.google.com/a/apereo.org/d/msgid/cas-user/3cbe7a3608edb6aedd78634e10d14bf72ea6a772.camel%40uvic.ca?utm_medium=email&utm_source=footer>
>>> .
>>>
>>
>>
>> -- 
>> Baron Fujimoto <[email protected]> :: UH Information Technology Services
>> minutas cantorum, minutas balorum, minutas carboratum desendus pantorum
>>
>
>
> -- 
> Baron Fujimoto <[email protected]> :: UH Information Technology Services
> minutas cantorum, minutas balorum, minutas carboratum desendus pantorum
>

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