Consider challengeResponse empty value an acceptable response.
@@ -111,7 +111,7 @@ public class AuthenticationProviderService {
String challengeResponse = request.getParameter(RadiusChallengeResponseField.PARAMETER_NAME);
// We do not have a challenge response, so we proceed normally
- if (challengeResponse == null || challengeResponse.isEmpty()) {
+ if (challengeResponse == null) {
// Initialize Radius Packet and try to authenticate
try {
