NFC-46 Check null authToken

Signed-off-by: Sander Kondratjev [email protected]

Author: aarmam

src/main/java/eu/webeid/security/validator/AuthTokenValidatorManager.java

@@ -35,6 +35,7 @@
 
 import java.io.IOException;
 import java.security.cert.X509Certificate;
+import java.util.Objects;
 
 /**
  * Provides the default implementation of {@link AuthTokenValidator}.
@@ -72,6 +73,7 @@ public WebEidAuthToken parse(String authToken) throws AuthTokenException {
     @Override
     public X509Certificate validate(WebEidAuthToken authToken, String currentChallengeNonce) throws AuthTokenException {
         try {
+            Objects.requireNonNull(authToken, "authToken must not be null");
             LOG.info("Starting token validation");
             return tokenValidatorFactory
                 .getValidatorFor(authToken.getFormat())