I have working on cas server with oauth 2.0 using google authentication provider from the sample application. Now, i have facing some issues while redirect the url from google authentication to cas server. The response "ticket" parameter returned value is always displaying "null".

The below details are log of the CAS server while access the application:

Key attribute..... javax.servlet.request.key_size
value attribute... 128

Key attribute..... javax.servlet.request.ssl_
session
value attribute... 5057fbbc894e5379eba72d525282a3f0d5920648603eec2b0c369431f7edd711

Key attribute..... javax.servlet.request.cipher_suite
value attribute... TLS_RSA_WITH_AES_128_CBC_SHA

Key param...... code
value param.... 4/WZJTJ_r9rhek2c5HHMpoUDvm4dmf.EscewamPm-cXXE-sT2ZLcbQnrMZeggI

serviceTicket... null

test............ null

2012-09-18 10:13:09,597 INFO [com.github.inspektr.audit.support.Slf4jLoggingAuditTrailManager] - <Audit trail record BEGIN

=============================================================
WHO: [username: test]
WHAT: supplied credentials: [username: test]
ACTION: AUTHENTICATION_FAILED
APPLICATION: CAS
WHEN: Wed Sep 18 10:13:56 IST 2012
CLIENT IP ADDRESS: 127.0.0.1
SERVER IP ADDRESS: 127.0.0.1
=============================================================

>
2012-09-18 10:13:09,699 INFO [com.github.inspektr.audit.support.Slf4jLoggingAuditTrailManager] - <Audit trail record BEGIN
=============================================================
WHO: [username: test]
WHAT: error.authentication.credentials.unsupported
ACTION: TICKET_GRANTING_TICKET_NOT_CREATED
APPLICATION: CAS
WHEN: Wed Sep 18 10:13:56 IST 2012
CLIENT IP ADDRESS: 127.0.0.1
SERVER IP ADDRESS: 127.0.0.1
=============================================================
>