Spring Security on Wildfly: error while executing the filter chain

I'm trying to integrate Spring Security SAML Extension with Spring Boot.

About the matter, I did develop a complete sample application. Its source code is available on GitHub:

• spring-boot-saml-integration on GitHub

By running it as Spring Boot application (running against the SDK built-in Application Server), the WebApp works fine.

Unfortunately, the same AuthN process doesn't work at all on Undertow/WildFly.

According to the logs, the IdP actually performs the AuthN process: the instructions of my custom UserDetails implementation are correctly executed. Despite the execution flow, Spring doesn't set up and persist the privileges for the current user.

@Component
public class SAMLUserDetailsServiceImpl implements SAMLUserDetailsService {
	
	// Logger
	private static final Logger LOG = LoggerFactory.getLogger(SAMLUserDetailsServiceImpl.class);
	
	@Override
	public Object loadUserBySAML(SAMLCredential credential)
			throws UsernameNotFoundException, SSOUserAccountNotExistsException {
		String userID = credential.getNameID().getValue();
		if (userID.compareTo("[email protected]") != 0) {		// We're simulating the data access.
			LOG.warn("SSO User Account not found into the system");
			throw new SSOUserAccountNotExistsException("SSO User Account not found into the system", userID);
		}
		LOG.info(userID + " is logged in");
		List<GrantedAuthority> authorities = new ArrayList<GrantedAuthority>();
		GrantedAuthority authority = new SimpleGrantedAuthority("ROLE_USER");
		authorities.add(authority);
		ExtUser userDetails = new ExtUser(userID, "password", true, true, true,
				true, authorities, "John", "Doe");
		return userDetails;
	}
}

While debugging, I found out the problem relies on the FilterChainProxy class. At runtime, the attribute FILTER_APPLIED of ServletRequest has a null value, thus Spring clears the SecurityContextHolder.

private final static String FILTER_APPLIED = FilterChainProxy.class.getName().concat(".APPLIED");

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
        throws IOException, ServletException {
    boolean clearContext = request.getAttribute(FILTER_APPLIED) == null;
    if (clearContext) {
        try {
            request.setAttribute(FILTER_APPLIED, Boolean.TRUE);
            doFilterInternal(request, response, chain);
        } finally {
            SecurityContextHolder.clearContext();
            request.removeAttribute(FILTER_APPLIED);
        }
    } else {
        doFilterInternal(request, response, chain);
    }
}

On VMware vFabric tc Sever and Tomcat, everything works totally fine. Do you have any idea about solving this issue?

Investigating the problem I have noticed that there is some mess with cookies and referers in the auth request.

Currently wildfly authentication will work if you change webapplication context to the Root Context:

 <server name="default-server" default-host="webapp">
     <http-listener name="default" socket-binding="http"/>
     <host name="default-host" alias="localhost" default-web-module="sso.war"/>
 </server>

After restarting wildfly and clearing cookies all should work as expected