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import it.inaf.ia2.aa.UserManager;
import it.inaf.ia2.aa.data.User;
import it.inaf.ia2.gms.persistence.LoggingDAO;
import java.io.IOException;
import java.security.Principal;
import java.util.Map;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class JWTFilter implements Filter {
private final LoggingDAO loggingDAO;
private final UserManager userManager;
public JWTFilter(LoggingDAO loggingDAO, UserManager userManager) {
this.loggingDAO = loggingDAO;
}
@Override
public void doFilter(ServletRequest req, ServletResponse res, FilterChain fc) throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) req;
HttpServletResponse response = (HttpServletResponse) res;
String authHeader = request.getHeader("Authorization");
if (request.isRequestedSessionIdValid()) {
HttpSession session = request.getSession(false);
User user = (User) session.getAttribute("user_data");
if (user != null) {
ServletRequestWithSessionPrincipal wrappedRequest = new ServletRequestWithSessionPrincipal(request, user);
fc.doFilter(wrappedRequest, res);
return;
}
}
fc.doFilter(req, res);
String token = authHeader.replace("Bearer", "").trim();
Map<String, Object> claims = userManager.parseIdTokenClaims(token);
loggingDAO.logAction("Attempt to access WS with invalid token", request);
response.sendError(HttpServletResponse.SC_UNAUTHORIZED, "Invalid access token: missing sub claim");
return;
}
ServletRequestWithJWTPrincipal wrappedRequest = new ServletRequestWithJWTPrincipal(request, token, claims);
loggingDAO.logAction("WS access from " + wrappedRequest.getUserPrincipal().getName(), request);
fc.doFilter(wrappedRequest, res);
}
private static class ServletRequestWithSessionPrincipal extends HttpServletRequestWrapper {
private final User principal;
public ServletRequestWithSessionPrincipal(HttpServletRequest request, User user) {
super(request);
this.principal = user;
}
@Override
public Principal getUserPrincipal() {
return principal;
}
}
private static class ServletRequestWithJWTPrincipal extends HttpServletRequestWrapper {
private final RapPrincipal principal;
public ServletRequestWithJWTPrincipal(HttpServletRequest request, String token, Map<String, Object> jwtClaims) {
this.principal = new RapPrincipal(token, jwtClaims);
}
@Override
public Principal getUserPrincipal() {