OAuth 2 Spring Boot Example

This is an example Repository to demonstrate how to implement OAuth 2.0 in a Spring Boot application. It is offering simple controllers to test the concept of authentication with specific roles.

Current Endpoints:

• /finegrained-auth/[admin,user, no-role & public] - Controller which demonstrates the finegrained authorization by setting the preAuthorization Annotation for each Endpoint
• /admin/admin - Controller which sets the preAuthorization on Class level, all endpoints will be secured by the admin role
• /user/user - Controller which sets the preAuthorization on Class level, all endpoints will be secured by the user role

Requirements

• Java 21
• Keycloak running an accessible

Configuration

• Add a realm in Keycloak
• Add a client in Keycloak
• Add a Realm Roles in Keycloak (admin, user)
• Add a user in Keycloak and assign the roles admin and user to the user
• Adjust the configuration in src/main/resources/application.properties to match your Keycloak configuration