SpringSecurity : Implement Role Hierarchy with In-Memory Authentication

Implement Role Hierarchy with In-Memory Authentication

In order to configure role hierarchy, you need to

1. make a bean RoleHierarchy
2. define a expressionhandler to read role hierarchy

package com.ekiras.ss.config;

import org.springframework.context.annotation.Bean;
import org.springframework.security.access.expression.SecurityExpressionHandler;
import org.springframework.security.access.hierarchicalroles.RoleHierarchy;
import org.springframework.security.access.hierarchicalroles.RoleHierarchyImpl;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.expression.DefaultWebSecurityExpressionHandler;

/**
 * @author ekiras
 */
@EnableWebSecurity
public class SpringSecurityConfigurer extends WebSecurityConfigurerAdapter{

    private SecurityExpressionHandler<filterinvocation> webExpressionHandler() {
        DefaultWebSecurityExpressionHandler defaultWebSecurityExpressionHandler = new DefaultWebSecurityExpressionHandler();
        defaultWebSecurityExpressionHandler.setRoleHierarchy(roleHierarchy());
        return defaultWebSecurityExpressionHandler;
    }

    @Bean
    public RoleHierarchy roleHierarchy(){
        RoleHierarchyImpl roleHierarchy = new RoleHierarchyImpl();
        roleHierarchy.setHierarchy("ADMIN > USER");
        return roleHierarchy;
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication()
                .withUser("ekansh")
                .password("password")
                .authorities("USER", "ROLE");
        auth.inMemoryAuthentication()
                .withUser("admin")
                .password("admin")
                .authorities("ADMIN");
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .authorizeRequests()
                .expressionHandler(webExpressionHandler())
                .antMatchers("/admin/**").hasAuthority("ADMIN")
                .antMatchers("/user/**").hasAuthority("USER")
                .anyRequest().authenticated()
            .and()
            .formLogin()
            .and()
            .logout()
        ;
    }
    
}

In the example above, we have made a role hierarchy where

1. ADMIN can access MODERATOR and USER roles,
2. MODERATOR can access USER roles.
3. USER can neither access MODERATOR nor ADMIN roles.

    @Bean
    public RoleHierarchy roleHierarchy(){
        RoleHierarchyImpl roleHierarchy = new RoleHierarchyImpl();
        roleHierarchy.setHierarchy("ADMIN > MODERATOR > USER");
        return roleHierarchy;
    }

This is an easy way to configure and manage roles and role permissions for making security groups.

Also Read

• Configure Spring Security with Spring boot
• Configure JDBC Authetication using MYSQL Query
• Authenticate User with Custom UserDetailsService
• Implement Role Hierarchy with In-Memory Authentication
• How to list the User Authorities in Controller,Filter and Services
• Disable Session Creation for Stateless Authentication

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