handle null value in extensions

src/main/resources/static/js/webauthn.js

@@ -347,6 +347,23 @@ function makeCredential(advancedOptions) {
                     makeCredentialOptions.extensions.cableRegistration.rpPublicKey =
                         strToBin(makeCredentialOptions.extensions.cableRegistration.rpPublicKey);
                 }
+
+                if('appid' in makeCredentialOptions.extensions.appid && makeCredentialOptions.extensions.appid == null)
+                    makeCredentialOptions.extensions.appid = undefined;
+                if('appidExclude' in makeCredentialOptions.extensions.appidExclude && makeCredentialOptions.extensions.appidExclude == null)
+                    makeCredentialOptions.extensions.appidExclude = undefined;
+                if('credProps' in makeCredentialOptions.extensions.credProps && makeCredentialOptions.extensions.credProps == null)
+                    makeCredentialOptions.extensions.credProps = undefined;
+                if('credentialProtectionPolicy' in makeCredentialOptions.extensions.credentialProtectionPolicy && makeCredentialOptions.extensions.credentialProtectionPolicy == null)
+                    makeCredentialOptions.extensions.credentialProtectionPolicy = undefined;
+                if('enforceCredentialProtectionPolicy' in makeCredentialOptions.extensions.enforceCredentialProtectionPolicy && makeCredentialOptions.extensions.enforceCredentialProtectionPolicy == null)
+                    makeCredentialOptions.extensions.enforceCredentialProtectionPolicy = undefined;
+                if('hmacCreateSecret' in makeCredentialOptions.extensions.hmacCreateSecret && makeCredentialOptions.extensions.hmacCreateSecret == null)
+                    makeCredentialOptions.extensions.hmacCreateSecret = undefined;
+                if('hmacGetSecret' in makeCredentialOptions.extensions.hmacGetSecret && makeCredentialOptions.extensions.hmacGetSecret == null)
+                    makeCredentialOptions.extensions.hmacGetSecret = undefined;
+                if('uvm' in makeCredentialOptions.extensions.uvm && makeCredentialOptions.extensions.uvm == null)
+                    makeCredentialOptions.extensions.uvm = undefined;
             }
             if (isChecked('#switch-uvm')) {
                 makeCredentialOptions.extensions.uvm = true;