Problem calling a "bearer-only" keycloak endpoint from a springboot (client app) to a also spring boot (bearer only app) - spring-boot

Question

Basically I'm trying to access a bearer-only endpoint from a client app which is using a "KeycloakRestTemplate".
I did follow this guidelines 1:1 (it is in German) : https://blog.codecentric.de/2017/09/keycloak-und-spring-security-teil-1-einrichtung-frontend/
My problem is that when I see the logs, the authentication on the side of the bearer only endpoint seems successful, as shown bellow:
Found [1] values in authorization header, selecting the first value for Bearer.
o.k.a.BearerTokenRequestAuthenticator : Verifying access_token
o.k.a.BearerTokenRequestAuthenticator : access_token: [LONG TOKEN HERE]
o.k.a.RefreshableKeycloakSecurityContext : checking whether to refresh.
org.keycloak.adapters.AdapterUtils : use realm role mappings
org.keycloak.adapters.AdapterUtils : Setting roles:
org.keycloak.adapters.AdapterUtils : role: create_vouchers
org.keycloak.adapters.AdapterUtils : role: public_realm_access
org.keycloak.adapters.AdapterUtils : role: overview_orders
org.keycloak.adapters.AdapterUtils : role: uma_authorization
User 'c1500da2-855f-4306-ab65-662160558101' invoking 'http://localhost:8082/articles' on client 'articlesBearerOnlyService'
o.k.adapters.RequestAuthenticator : Bearer AUTHENTICATED
.k.a.t.AbstractAuthenticatedActionsValve : AuthenticatedActionsValve.invoke /articles
o.k.a.AuthenticatedActionsHandler : AuthenticatedActionsValve.invoke http://localhost:8082/articles
cors validation not needed as were not a secure session or origin header was null: {0}
o.k.a.AuthenticatedActionsHandler : Policy enforcement is disabled.
but then directly afterwards on the logs comes this:
o.k.adapters.PreAuthActionsHandler : adminRequest http://localhost:8082/login
o.k.adapters.PreAuthActionsHandler : checkCorsPreflight http://localhost:8082/login
.k.a.t.AbstractAuthenticatedActionsValve : AuthenticatedActionsValve.invoke /login
o.k.a.AuthenticatedActionsHandler : AuthenticatedActionsValve.invoke http://localhost:8082/login
o.k.a.AuthenticatedActionsHandler : Origin: null uri: http://localhost:8082/login
o.k.a.AuthenticatedActionsHandler : cors validation not needed as were not a secure session or origin header was null: {0}
o.k.a.AuthenticatedActionsHandler : Policy enforcement is disabled.
so, it tries to redirect to adminRequest http://localhost:8082/login? why, and how could this be solved?
I did also also tried with postman (getting the acces-token from the token end-point) and pasting it on the Authorization header of this "bearer-only" endpoint, and similarly by seeing the logs, the user seems authorized exacltly like in the first log block above, the diference is that is doesn't try to redirect anywhere but I receive a 401.
{
"timestamp": "2019-09-05T11:18:51.347+0000",
"status": 401,
"error": "Unauthorized",
"message": "Unauthorized",
"path": "/articles" }
Could somebody please provide some guidance into a possible solution?
Thanks in advance!
----------------------------------------
EDITED
----------------------------------------
here is the application properties file:
server.port = 8082
spring.application.name = articleBearerOnlyService
keycloak.auth-server-url=http://localhost:8080/auth
keycloak.realm=[REALM]
keycloak.resource=articlesBearerOnlyService
keycloak.bearer-only=true
keycloak.cors=true
keycloak.credentials.secret=[SECRET]
keycloak.ssl-required = external
# access controlled through spring security
#keycloak.security-constraints[0].auth-roles[0]=overview_orders
#keycloak.security-constraints[0].security-collections[0].patterns[0]=/articles
logging.level.org.keycloak=TRACE
and here the SecurityConfig :
#KeycloakConfiguration
#EnableWebSecurity
class SecurityConfig extends KeycloakWebSecurityConfigurerAdapter {
private final KeycloakClientRequestFactory keycloakClientRequestFactory;
public SecurityConfig(KeycloakClientRequestFactory keycloakClientRequestFactory) {
this.keycloakClientRequestFactory = keycloakClientRequestFactory;
//to use principal and authentication together with #async
SecurityContextHolder.setStrategyName(SecurityContextHolder.MODE_INHERITABLETHREADLOCAL);
}
/* remove default spring "ROLE_" prefix appending to keycloak's roles*/
#Autowired
public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
KeycloakAuthenticationProvider keycloakAuthenticationProvider = keycloakAuthenticationProvider();
keycloakAuthenticationProvider.setGrantedAuthoritiesMapper(new SimpleAuthorityMapper());
auth.authenticationProvider(keycloakAuthenticationProvider);
}
#Bean
#Override
protected SessionAuthenticationStrategy sessionAuthenticationStrategy() {
// NullAuthenticatedSessionStrategy() for bearer-only services
return new NullAuthenticatedSessionStrategy();
}
/* configure cors & requests handling behaviour*/
#Override
protected void configure(HttpSecurity http) throws Exception {
super.configure(http);
http.cors()
.and()
.csrf()
.disable()
.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
.sessionAuthenticationStrategy(sessionAuthenticationStrategy())
.and()
.authorizeRequests()
.antMatchers("/articles").hasRole("overview_orders")
.anyRequest().permitAll();
}
// Spring boot integration
#Bean
public KeycloakConfigResolver keycloakConfigResolver() {
return new KeycloakSpringBootConfigResolver();
}
// *************************** Avoid Bean redefinition ********************************
#Bean
public FilterRegistrationBean keycloakAuthenticationProcessingFilterRegistrationBean(
KeycloakAuthenticationProcessingFilter filter) {
FilterRegistrationBean registrationBean = new FilterRegistrationBean(filter);
registrationBean.setEnabled(false);
return registrationBean;
}
#Bean
public FilterRegistrationBean keycloakPreAuthActionsFilterRegistrationBean(
KeycloakPreAuthActionsFilter filter) {
FilterRegistrationBean registrationBean = new FilterRegistrationBean(filter);
registrationBean.setEnabled(false);
return registrationBean;
}
#Bean
public FilterRegistrationBean keycloakAuthenticatedActionsFilterBean(
KeycloakAuthenticatedActionsFilter filter) {
FilterRegistrationBean registrationBean = new FilterRegistrationBean(filter);
registrationBean.setEnabled(false);
return registrationBean;
}
#Bean
public FilterRegistrationBean keycloakSecurityContextRequestFilterBean(
KeycloakSecurityContextRequestFilter filter) {
FilterRegistrationBean registrationBean = new FilterRegistrationBean(filter);
registrationBean.setEnabled(false);
return registrationBean;
}
#Bean
#Override
#ConditionalOnMissingBean(HttpSessionManager.class)
protected HttpSessionManager httpSessionManager() {
return new HttpSessionManager();
}
}

Answer 1

The #SpringBootApplication annotation is a composite of these three annotations: #EnableAutoConfiguration, #ComponentScan and #Configuration. Annotating a class e.g. com.example.demo.DemoApplication with #SpringBootApplication, results in Spring looking for other components, configurations, and services inside com.example.demo and all of its sub-packages.
A class like com.example.config.DemoConfig therefore cannot be found by Spring automatically. If you want, you can give hints to Spring where to look for components via #ComponentScan(basePackages = "com.some.package"). Check out this article if you like to know more.

Answer 2

In this particular case, my #KeycloakConfiguration class SecurityConfig{...}, was completely ignored, and thus the application behaved as if none security config was provided at all.
Now, why was the SecurityConfig ignored?
- it turned out to be (I almost feel shame) path location of the class; I usually would place such a class under:
com.[company].[domain].configuration
In my case (since I'm only prototyping with keycloak + spring and not particularly concerned with class location right now). I did place my SecurityConfig class under:
com.[company].configuration
This made spring boot completely ignore this class.
Follow up question: I'm new to Sprint boot, is it 100% necessary to place all code under "com.[company].[domain].configuration", without modifying the pom (just having a newly created vanilla springboot project via the initializr)?