Add kerberos auth to TestKit backend (neo4j#997) (neo4j#1050)

* Add kerberos auth to TestKit backend

* Turns out kerberos expects ticket instead of credentials

* Add Feature:Auth:Kerberos Testkit feature support

Co-authored-by: Dmitriy Tverdiakov <[email protected]>

Co-authored-by: Robsdedude <[email protected]>

Author: injectives

testkit-backend/src/main/java/neo4j/org/testkit/backend/messages/requests/GetFeatures.java

@@ -39,7 +39,8 @@ public class GetFeatures implements TestkitRequest
             "AuthorizationExpiredTreatment",
             "ConfHint:connection.recv_timeout_seconds",
             "Temporary:DriverFetchSize",
-            "Temporary:DriverMaxTxRetryTime"
+            "Temporary:DriverMaxTxRetryTime",
+            "Feature:Auth:Kerberos"
     ) );
 
     private static final Set<String> SYNC_FEATURES = new HashSet<>( Arrays.asList(

testkit-backend/src/main/java/neo4j/org/testkit/backend/messages/requests/NewDriver.java

@@ -75,12 +75,15 @@ public TestkitResponse process( TestkitState testkitState )
                                           data.authorizationToken.getTokens().get( "credentials" ),
                                           data.authorizationToken.getTokens().get( "realm" ) );
             break;
+        case "kerberos":
+            authToken = AuthTokens.kerberos( data.authorizationToken.getTokens().get( "credentials" ) );
+            break;
         default:
             return BackendError.builder()
                                .data( BackendError
                                               .BackendErrorBody.builder()
                                                                .msg( "Auth scheme " + data.authorizationToken.getTokens().get( "scheme" ) +
-                                                                     "not implemented" )
+                                                                     " not implemented" )
                                                                .build() )
                                .build();
         }