[keycloak-user] Keycloak + Custom AuthenticatorFactory + Spring 5

[Tommaso Tamantini]

Hi to all,

 

I'm trying to develope a custom AuthenticatorFactory with a custom
Authenticator.

 

I would like to inject my custom Authenticator  as Spring Bean into my
custom AuthenticatorFactory (because my authenticator should use an existing
spring library).

 

My authenticator is like:

 

@Component

public class MyAuthenticator extends AbstractUsernameFormAuthenticator
implements Authenticator {

[.]

 

To achieve it, I created an  ApplicationContextAware bean 

 

@Service

public class BeanUtil implements ApplicationContextAware {

 

     private static ApplicationContext applicationContext;

     

     public BeanUtil() {

     }

 

     @Override

     public void setApplicationContext(ApplicationContext
applicationContext) throws BeansException {

          this.applicationContext = applicationContext;

     }

 

     public static Authenticator getAuthenticatorBean() { 

          return applicationContext.getBean(MyAuthenticator.class);

     } 

 

}

 

My factory is:

 

public class MyAuthenticatorFactory implements AuthenticatorFactory,
ConfigurableAuthenticatorFactory {

 

     public static final String PROVIDER_ID = "aruba-alias-authenticator";

 

     public static final String G_RECAPTCHA_RESPONSE =
"g-recaptcha-response";

     public static final String RECAPTCHA_REFERENCE_CATEGORY = "recaptcha";

     public static final String SITE_KEY = "site.key";

     public static final String NUMBER_KEY = "number.key";

     public static final String SITE_SECRET = "secret";

 

     @Override

     public String getId() {

          return PROVIDER_ID;

     }

 

     @Override

     public MyAuthenticator create(KeycloakSession session) {

          return BeanUtil.AuthenticatorBean();

     }

 

[.]

 

Keycloak starts up correctly. 

 

When I try to use myAuthenticator, i get: 

 

 

16:46:48,484 INFO  [org.jboss.as] (Controller Boot Thread) WFLYSRV0060: Http
management interface listening on http://0.0.0.0:9990/management

sia-keycloak | 16:46:48,484 INFO  [org.jboss.as] (Controller Boot Thread)
WFLYSRV0051: Admin console listening on http://0.0.0.0:9990

sia-keycloak | 16:46:48,485 INFO  [org.jboss.as] (Controller Boot Thread)
WFLYSRV0025: Keycloak 4.5.0.Final (WildFly Core 5.0.0.Final) started in
23456ms - Started 943 of 1231 services (653 services are lazy, passive or
on-demand)

sia-keycloak | 16:47:12,357 WARN  [org.keycloak.services] (default task-3)
KC-SERVICES0013: Failed authentication: java.lang.NullPointerException

sia-keycloak |  at
...authenticator.alias.BeanUtil.getArubaAliasAuthenticatorBean(BeanUtil.java
:22)

sia-keycloak |  at
..authenticator.alias.AuthenticatorFactory.create(MyAuthenticatorFactory.jav
a:35)

sia-keycloak |  at
...authenticator.alias.AuthenticatorFactory.create(MyAuthenticatorFactory.ja
va:1)

 

 

The reason in that the Spring Context is null. 

 

Any idea about how to fix this issue?

 

 

Many thanks, 

Tom