Added login filter to /api/authn/shibboleth

dspace-server-webapp/src/main/java/org/dspace/app/rest/security/WebSecurityConfiguration.java

@@ -109,6 +109,11 @@ public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {
                                                       restAuthenticationService),
                              LogoutFilter.class)
 
+            //Add a filter before our shibboleth endpoints to do the authentication based on the data in the HTTP request
+            .addFilterBefore(new StatelessLoginFilter("/api/authn/shibboleth", authenticationManager(),
+                                                      restAuthenticationService),
+                             LogoutFilter.class)
+
             // Add a custom Token based authentication filter based on the token previously given to the client
             // before each URL
             .addFilterBefore(new StatelessAuthenticationFilter(authenticationManager(), restAuthenticationService,