🚀 Introduction to Spring Security

Spring Security is a powerful and flexible authentication and authorization framework for Java-based applications. It provides robust security features such as:

  • 🔒 Authentication (e.g., username/password, OAuth2)
  • 🛡️ Authorization (e.g., role-based access control)
  • 🧠 Secure coding practices (e.g., CSRF protection, XSS filtering)

spring security icon

📚 Core Concepts

  1. Authentication
    • Verifies user identity before granting access.
    • Common providers: DaoAuthenticationProvider, OAuth2LoginAuthenticationProvider.
  2. Authorization
    • Controls access to resources based on roles or permissions.
    • Uses AccessDecisionManager and SecurityFilterChain.
  3. Security Filters
    • Processes requests through a chain of filters (e.g., UsernamePasswordAuthenticationFilter).

authorization flow

🧪 Quick Start Example

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .authorizeRequests()
            .anyRequest().authenticated()
            .and()
            .formLogin();
    }
}

👉 Explore Spring Security Configuration Details

📌 Best Practices

  • Use @EnableWebSecurity to enable security features.
  • Always validate CSRF tokens in web applications.
  • Leverage PasswordEncoder for secure password storage.

csrf protection

📘 Further Reading

For deeper insights into Spring Security:

spring security logo