Hello everybody,

Here is my problem :

Our information system rely upon cas 5.2.3 to enable SSO. We have webapps that 
communicate with soap ws and rest APIs. 
SSO is configured to perform username+password authentication via a rest API, 
and every application uses cas 2.0 protocol. 
So far everything works fine, TGT and PGT are granted, st and pt are validated, 
no problem. 
Now we want to use spnego/Kerberos authentication on one of our webapps instead 
of the classic form/username+password auth. We managed to configure cas to 
perform spnego authentication on this webapp. The user type the url of the 
webapp, negotiation occurs and the user is connected to the application. The 
logs show that TGT and PGT are being granted for the webapp. The problem is 
when the application try to get a proxy ticket for another backend 
cas-protected application (soap ws or rest api). We made a TCP dump to monitor 
the exchange between CAS and the webapp, and we noticed that everything worked 
fine until the webapp uses its PGT to get a pt for the soap ws. the CAS reject 
the request stating that the service is not allowed. Without spnego everything 
works fine, the soap ws is allowed. From here we tried tinkering with CAS and 
service configuration without success. 
In the end We were wondering if what we are trying to do is possible ? Mix 
spnego auth with username+password auth ? Has anyone here done that, using 
which CAS configuration ? As far as I understand the CAS protocol, once TGT and 
PGT are granted,  the auth  method is irrelevant, only the tickets are used to 
delegate authority...

Any help would be greatly appreciated.

Regards

Arnaud. 

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