Univention Bugzilla – Bug 55903
Keycloak: Login with a recently deleted user results in "Unexpected error when handling authentication request to identity provider."
Last modified: 2024-03-26 19:31:51 CET
If you delete a user and try a saml/keycloak login with that user, instead of "username or password wrong" you get "Unexpected error when handling authentication request to identity provider." as an error. keycloak logs: 2023-03-22 09:38:24,801 WARN [org.keycloak.services] (executor-thread-9) KC-SERVICES0013: Failed authentication: java.lang.NullPointerException at org.keycloak.storage.ldap.idm.store.ldap.LDAPIdentityStore.validatePassword(LDAPIdentityStore.java:349) at org.keycloak.storage.ldap.LDAPStorageProvider.validPassword(LDAPStorageProvider.java:633) at org.keycloak.storage.ldap.LDAPStorageProvider.isValid(LDAPStorageProvider.java:719) at org.keycloak.credential.LegacyUserCredentialManager.lambda$validate$11(LegacyUserCredentialManager.java:255) at java.base/java.util.Collection.removeIf(Collection.java:544) at org.keycloak.credential.LegacyUserCredentialManager.validate(LegacyUserCredentialManager.java:255) at org.keycloak.credential.LegacyUserCredentialManager.isValid(LegacyUserCredentialManager.java:71) at org.keycloak.models.SubjectCredentialManager.isValid(SubjectCredentialManager.java:45) at org.keycloak.authentication.authenticators.browser.AbstractUsernameFormAuthenticator.validatePassword(AbstractUsernameFormAuthenticator.java:229) at org.keycloak.authentication.authenticators.browser.AbstractUsernameFormAuthenticator.validateUserAndPassword(AbstractUsernameFormAuthenticator.java:150) at org.keycloak.authentication.authenticators.browser.UsernamePasswordForm.validateForm(UsernamePasswordForm.java:55) at org.keycloak.authentication.authenticators.browser.UsernamePasswordForm.action(UsernamePasswordForm.java:48) at org.keycloak.authentication.DefaultAuthenticationFlow.processAction(DefaultAuthenticationFlow.java:155) at org.keycloak.authentication.AuthenticationProcessor.authenticationAction(AuthenticationProcessor.java:977) at org.keycloak.services.resources.LoginActionsService.processFlow(LoginActionsService.java:314) at org.keycloak.services.resources.LoginActionsService.processAuthentication(LoginActionsService.java:285) at org.keycloak.services.resources.LoginActionsService.authenticate(LoginActionsService.java:277) at org.keycloak.services.resources.LoginActionsService.authenticateForm(LoginActionsService.java:342) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:170) at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:130) at org.jboss.resteasy.core.ResourceMethodInvoker.internalInvokeOnTarget(ResourceMethodInvoker.java:660) at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTargetAfterFilter(ResourceMethodInvoker.java:524) at org.jboss.resteasy.core.ResourceMethodInvoker.lambda$invokeOnTarget$2(ResourceMethodInvoker.java:474) at org.jboss.resteasy.core.interception.jaxrs.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:364) at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:476) at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:434) at org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:192) at org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:141) at org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:32) at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:492) at org.jboss.resteasy.core.SynchronousDispatcher.lambda$invoke$4(SynchronousDispatcher.java:261) at org.jboss.resteasy.core.SynchronousDispatcher.lambda$preprocess$0(SynchronousDispatcher.java:161) at org.jboss.resteasy.core.interception.jaxrs.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:364) at org.jboss.resteasy.core.SynchronousDispatcher.preprocess(SynchronousDispatcher.java:164) at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:247) at io.quarkus.resteasy.runtime.standalone.RequestDispatcher.service(RequestDispatcher.java:73) at io.quarkus.resteasy.runtime.standalone.VertxRequestHandler.dispatch(VertxRequestHandler.java:151) at io.quarkus.resteasy.runtime.standalone.VertxRequestHandler.handle(VertxRequestHandler.java:82) at io.quarkus.resteasy.runtime.standalone.VertxRequestHandler.handle(VertxRequestHandler.java:42) at io.vertx.ext.web.impl.RouteState.handleContext(RouteState.java:1212) at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:163) at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:141) at io.quarkus.vertx.http.runtime.StaticResourcesRecorder$2.handle(StaticResourcesRecorder.java:67) at io.quarkus.vertx.http.runtime.StaticResourcesRecorder$2.handle(StaticResourcesRecorder.java:55) at io.vertx.ext.web.impl.RouteState.handleContext(RouteState.java:1212) at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:163) at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:141) at io.quarkus.vertx.http.runtime.VertxHttpRecorder$5.handle(VertxHttpRecorder.java:380) at io.quarkus.vertx.http.runtime.VertxHttpRecorder$5.handle(VertxHttpRecorder.java:358) at io.vertx.ext.web.impl.RouteState.handleContext(RouteState.java:1212) at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:163) at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:141) at org.keycloak.quarkus.runtime.integration.web.QuarkusRequestFilter.lambda$createBlockingHandler$1(QuarkusRequestFilter.java:90) at io.vertx.core.impl.ContextImpl.lambda$null$0(ContextImpl.java:159) at io.vertx.core.impl.AbstractContext.dispatch(AbstractContext.java:100) at io.vertx.core.impl.ContextImpl.lambda$executeBlocking$1(ContextImpl.java:157) at io.quarkus.vertx.core.runtime.VertxCoreRecorder$13.runWith(VertxCoreRecorder.java:545) at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2449) at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1478) at org.jboss.threads.DelegatingRunnable.run(DelegatingRunnable.java:29) at org.jboss.threads.ThreadLocalResettingRunnable.run(ThreadLocalResettingRunnable.java:29) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.base/java.lang.Thread.run(Thread.java:829) This is due to some internal caching in keycloak (see https://git.knut.univention.de/univention/components/keycloak-app/-/issues/67). After 5 minutes or so it works as expected (logon still not possible, but with a proper error message.)