WebService-CAS: start session without username,password

[lourdes]

I have integrated alfresco CAS.
From an application is also integrated with the same CAS I want to use the Alfresco web services.
Do not know how to start session in alfresco cas web services directly, without having to enter username and password

Is it possible to do this?

my application generates documents in alfresco and I want the author appears as the user currently logged in cas

[openpj]

I think that is not possible to use CAS from Web Services API of Alfresco directly.
Anyway you could create your custom Web Services stub that use a CAS ticket to validate it using wcservice and the ticket parameter in the query string.
Hope this helps.