> I'ld like to have the user login with their email address and password > but once they are authenticated have CAS send the username of the user > (not the email address) as part of the authentication response XML.
This is possible using a combination of attributes and requesting a SAML 1.1 response. See http://www.ja-sig.org/wiki/display/CASUM/Attributes for more information on attributes. See http://www.ja-sig.org/wiki/display/CASC/JASIG+Client+SAML +Saml11TicketValidationFilter+Example for how to configure the Java CAS client to get a SAML response. See http://www.middleware.vt.edu/doku.php?id=middleware:cas:client#obtaining_pid_and_attributes_from_java_application for how to get at attributes from your CAS-enabled application. M
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