Diving Into Spring Security 3.1: Embrace The Change, Developers!
Tags: springsecurity, springboot
Published: 2023-06-17 00:08:44

Hello there, adventurous coders!

If you've been wrestling with Spring Security lately, you're in for a treat. Say "hello" to Spring Security 3.1 – the shiny new version ready to help you secure your applications like a pro. What’s the fuss all about? Well, allow me to guide you through this maze of new features, improvements, and yes, deprecations.

## **The OAuth 2.0 Upgrade**
Let's start by talking about our dear old friend OAuth 2.0, that incredibly popular authorization protocol that, let's be honest, we all sometimes love to hate. Spring Security 3.1 now provides a more streamlined support for OAuth 2.0. Client registration, password grant, and refresh token grant – all included! Building OAuth 2.0-based applications is now as smooth as a well-oiled bicycle.

## The JWT Lift
Next up is JWT, or JSON Web Tokens. If you've ever wished for a fortune cookie that carries secure claims instead of vague prophecies, JWT is your genie in a bottle. Spring Security 3.1 provides a more effective support for decoding JWT tokens and extracting those sweet, sweet claims. Your JWT-based applications are about to hit a new level of ease and efficiency.

### The Great Deprecation Party
Spring Security 3.1 isn’t just about welcoming new features; it’s also about saying 'Adieu!' to some old ones. Let's take a moment to bid farewell to CSRF protection, HTTP Basic authentication, and form login.

## - CSRF Protection
Once a shield against Cross-Site Request Forgery attacks, CSRF protection takes a bow as we welcome the more secure SameSite cookie attribute. Attackers, beware!

## - HTTP Basic Authentication and Form Login
HTTP Basic authentication and form login, both authentication methods we have relied on for so long, have decided to retire in favor of the newer and more secure OAuth 2.0 protocol. Talk about passing on the baton!

## Functional Interfaces: The New Kid On The Block
With Java 8 came the power of functional interfaces, enabling us to write more concise and expressive code. Spring Security 3.1 harnesses this power for features like authentication and authorization. For instance, AuthenticationProvider, a functional interface, allows you to create custom authentication providers. Similarly, with the AuthorizationDecisionManager interface, you can write custom decision managers for resource access control. It's like giving your coding abilities a turbo boost!

` 
/*
*SecurityConfig Class Bean Configuration Example
*/


    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {

        http.csrf(csrf -> csrf.disable())
                .authorizeRequests().
                requestMatchers("/test").authenticated().requestMatchers("/auth/login").permitAll()
                .anyRequest()
                .authenticated()
                .and().exceptionHandling(ex -> ex.authenticationEntryPoint(point))
                .sessionManagement(session -> session.sessionCreationPolicy(SessionCreationPolicy.STATELESS));
        http.addFilterBefore(filter, UsernamePasswordAuthenticationFilter.class);
        return http.build();
    }


}`
`

## Improved Performance
Finally, if the earlier features were the icing on the cake, then the improved performance is the cherry on top. This version introduces a series of optimizations, including security data caching and enhanced thread pool management. Some benchmarks have even reported a whopping 2x performance improvement!

In the world of Spring Security, this is akin to turning your bicycle into a race car!

## Conclusion
All in all, Spring Security 3.1 is like a superhero upgrade, packed with new features, improvements, and some farewells too. If you're using Spring Security, consider upgrading to 3.1 - your future self will thank you. And even if you hit a few bumps on the road, remember, every great developer was once where you are. Keep learning, keep improving, and most importantly, keep coding!

That's it for now. Until next time, happy secure coding!