Enable role authentication with spring boot (security) and keycloak?

Question

I am trying to do a simple thing.

Want to make a request to a single endpoint and send a bearer token (from a client), I want this token to be validated and depending on the role assigned on keycloak accept/deny request on my endpoint.

I followed many tutorials and even books but most of all them I simply dont understand.

Followed this to setup my keycloak info (realm, role, user) https://medium.com/@bcarunmail/securing-rest-api-using-keycloak-and-spring-oauth2-6ddf3a1efcc2

So,

I basically set up my keycloak with a client, a user with a specific role "user" and configured it like this:

@Configuration
@KeycloakConfiguration
//@ComponentScan(basePackageClasses = KeycloakSecurityComponents.class)
public class SecurityConf extends KeycloakWebSecurityConfigurerAdapter
{
    /**
     * Registers the KeycloakAuthenticationProvider with the authentication manager.
     */
    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth.authenticationProvider(keycloakAuthenticationProvider());
    }

    /**
     * Defines the session authentication strategy.
     */
    @Bean
    @Override
    protected SessionAuthenticationStrategy sessionAuthenticationStrategy() {
        return new RegisterSessionAuthenticationStrategy(new SessionRegistryImpl());
    }

    @Bean
    public KeycloakSpringBootConfigResolver KeycloakConfigResolver() {
        return new KeycloakSpringBootConfigResolver();
    }

    @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;
    }


    @Override
    protected void configure(HttpSecurity http) throws Exception
    {
        super.configure(http);
        http
                .authorizeRequests()
                .antMatchers("/user/*").hasRole("admin")
                .antMatchers("/admin*").hasRole("user")

    }
}

I dont understand why at many tutorials I see this(as the last rule):

.anyRequest().permitAll();

Basically when I set that I have no security, I can call the endpoints without a bearer token.

But when I add this as last rule

 .anyRequest().denyAll();

I always get a 403.

Debbugging I found this:

Request is to process authentication

f.KeycloakAuthenticationProcessingFilter : Attempting Keycloak authentication
o.k.a.BearerTokenRequestAuthenticator    : Found [1] values in authorization header, selecting the first value for Bearer.
o.k.a.BearerTokenRequestAuthenticator    : Verifying access_token
o.k.a.BearerTokenRequestAuthenticator    : successful authorized
a.s.a.SpringSecurityRequestAuthenticator : Completing bearer authentication. Bearer roles: [] 
o.k.adapters.RequestAuthenticator        : User 'testuser' invoking 'http://localhost:9090/api/user/123' on client 'users'
o.k.adapters.RequestAuthenticator        : Bearer AUTHENTICATED
f.KeycloakAuthenticationProcessingFilter : Auth outcome: AUTHENTICATED
o.s.s.authentication.ProviderManager     : Authentication attempt using org.keycloak.adapters.springsecurity.authentication.KeycloakAuthenticationProvider
o.s.s.core.session.SessionRegistryImpl   : Registering session 5B871A0E2AF55B70DC8E3B7436D79333, for principal testuser
f.KeycloakAuthenticationProcessingFilter : Authentication success using bearer token/basic authentication. Updating SecurityContextHolder to contain: org.keycloak.adapters.springsecurity.token.KeycloakAuthenticationToken@355f68d6: Principal: testuser; Credentials: [PROTECTED]; Authenticated: true; Details: org.keycloak.adapters.springsecurity.account.SimpleKeycloakAccount@5d7a32a9; Not granted any authorities
[nio-9090-exec-3] o.s.security.web.FilterChainProxy        : /api/user/123 at position 8 of 15 in additional filter chain; firing Filter: 'RequestCacheAwareFilter'
nio-9090-exec-3] o.s.s.w.s.DefaultSavedRequest            : pathInfo: both null (property equals)
[nio-9090-exec-3] o.s.s.w.s.DefaultSavedRequest            : queryString: both null (property equals)

Seems like I get no bearer roles ...

My dependencies:

        <dependency>
            <groupId>org.keycloak</groupId>
            <artifactId>keycloak-spring-boot-starter</artifactId>
            <version>6.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.keycloak</groupId>
            <artifactId>keycloak-spring-security-adapter</artifactId>
            <version>6.0.1</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>

My problem?

I request an access token sending:

client_id -> my client from keycloak
username -> my user from keycloak
password -> my password from keycloak
grant_type -> password
client_secret -> from keycloak

I get a token and then I use to request to my app endoint. My requests are always valid no matter what endpoint I use (the one with role user or with role admin).

At my properties I have something like this:

keycloak:
  auth-server-url: http://localhost:8080/auth/
  resource: users-api
  credentials:
    secret : my-secret
  use-resource-role-mappings : true
  realm: my-realm
  realmKey:  my-key
  public-client: true
  principal-attribute: preferred_username
  bearer-only: true

Any idea how to actually enabling the roles in this case?

Do I have to configure a client to use JWT? any ideas?

I also added the annotations on my endpoint

@Secured("admin")
@PreAuthorize("hasAnyAuthority('admin')")

but seems they dont do anything...

-- EDIT --

After fixed the url to match the resource I still get 403.

"realm_access": {
    "roles": [
      "offline_access",
      "admin",
      "uma_authorization"
    ]
  },
  "resource_access": {
    "account": {
      "roles": [
        "manage-account",
        "manage-account-links",
        "view-profile"
      ]
    }
  },

Is it somehow related the resource_access with my problem?

Answer 1

in Debug stack: I see you are calling /api/user/123 and in your security configs you are securing /user/* which is not the same, change your security to:

.antMatchers("/api/user/*").hasRole("user")
                .antMatchers("/api/admin*").hasRole("admin")

P.S: you don't need to register KeycloakAuthenticationProcessingFilter and KeycloakPreAuthActionsFilter

Answer 2

I know this is an old post but I'm just writing this for future reference in case anyone else has the same problem.

If you look into the logs, Keycloak successfully authenticated the access token but there are not any granted authorities. That's why Spring doesn't authorize the request and you get HTTP 403 Forbidden:

f.KeycloakAuthenticationProcessingFilter : Authentication success using bearer token/basic authentication. Updating SecurityContextHolder to contain: org.keycloak.adapters.springsecurity.token.KeycloakAuthenticationToken@355f68d6: Principal: testuser; Credentials: [PROTECTED]; Authenticated: true; Details: org.keycloak.adapters.springsecurity.account.SimpleKeycloakAccount@5d7a32a9; Not granted any authorities

That's because Keycloak adapter is configured to use resource (i.e. client-level) role mappings instead of realm-level role mappings:

use-resource-role-mappings: If set to true, the adapter will look inside the token for application-level role mappings for the user. If false, it will look at the realm level for user role mappings. This is OPTIONAL. The default value is false.

Here is the link about adapter configurations.

So, if you want to get authorized via realm roles, properties should be like this:

keycloak:
  auth-server-url: http://localhost:8080/auth/
  resource: users-api
  credentials:
    secret : my-secret
  use-resource-role-mappings : false
  realm: my-realm
  realmKey:  my-key
  public-client: true
  principal-attribute: preferred_username
  bearer-only: true

Note: If you want to use both realm-level and client-level role mappings, then you should override KeycloakAuthenticationProvider.authenticate() method to provide the necessary roles by combining them yourself.

Answer 3

permitAll:

Whenever you want to allow any request to access the particular resource/URL you can use permitAll. For example, the Login URL should be accessible to everyone.

denyAll:

Whenever you want to block the access of particular URL no matter from where the request comes or who is making request(ADMIN)

You also have miss-match with URL and Role (you are granting URL with admin to USER and vise-versa). (It's a good practice to use the role as ROLE_ADMIN or ADMIN or USER) Form your stack I can see Not granted any authorities so please recheck the code with authorities

 http
         .csrf().disable()
         .authorizeRequests()
         .antMatchers("/api/user/**").hasRole("ADMIN")
         .antMatchers("/api/admin/**").hasRole("USER")
         .anyRequest().authenticated();