Prototype
char* tas3_wsp_validate(tas3_conf* cf, tas3_ses* ses,
const char* az_cred, const char* soap_req);
TAS3 configuration object, see tas3_new_conf()
Session object that contains the EPR cache, see tas3_new_ses()
(Optional) Additional authorization credentials or attributes, query string format.
Entire SOAP envelope as a string
idpnid, as a string, of the target identity of the request (rest of the information is populated to the session object, from where it can be retrieved).