Spring Security Configuration

In this lesson, we'll configure Spring Security to work with our user provisioning filter.

Create Spring Security Configuration

Spring Security configuration is central to managing authentication and authorization in our application.

Let's create a new configuration class:

@Configuration
public class SecurityConfig {

    @Bean
    public SecurityFilterChain filterChain(
            HttpSecurity http,
            UserProvisioningFilter userProvisioningFilter) throws Exception {
        http
                .authorizeHttpRequests(authorize ->
                        // All requests must be authenticated
                        authorize.anyRequest().authenticated())
                .csrf(csrf -> csrf.disable())
                .sessionManagement(session ->
                        session.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
                .oauth2ResourceServer(oauth2 ->
                        oauth2.jwt(
                                Customizer.withDefaults()
                        ))
                .addFilterAfter(userProvisioningFilter, BearerTokenAuthenticationFilter.class);

        return http.build();
    }
}

Configuration Components

The configuration consists of several key parts that work together:

The authorizeHttpRequests() method sets up request authorization, requiring authentication for all incoming requests.

We disable CSRF protection as it's not typically needed for REST APIs.

The sessionManagement() configuration sets our application to be stateless, which is standard for REST APIs.

The oauth2ResourceServer() configuration sets up JWT token validation using default settings.

Finally, we add our user provisioning filter after the BearerTokenAuthenticationFilter, ensuring authentication happens before user provisioning.

Summary

Created a basic Spring Security configuration file
Disabled the CSRF mechanism on our REST API
Configured Spring Security to be stateless
Configured Spring Security to use the UserProvisioningFilter