Authomatically authenticate to Cognos with CMS from WAS app (same LDAP)

[stancho]

Hello guys,

I'm calling Cognos reports through CMS (using REST and JSON) from application code deployed in WAS7.
The user is authenticated in WAS through LDAP.
Cognos is configured with the same LDAP.

Is it possible to make SSO and to pass the authentication credentials from WAS to Cognos?
I would like to authenticate to Cognos automatically with the WAS credentials?

Is that possible?
I read about shared secrets, LTPA tokens etc.. but it seems that nothing is working in my case.

Thanks and Regards,
Stancho