Spring Security - Remember Me

The "Remember Me" functionality is a convenient feature for users, so they don't have to log in every time they visit a website. Spring Security offers out-of-the-box support for this feature, which typically works by setting a cookie on the user's browser.

Here's how to implement the "Remember Me" functionality using Spring Security:

Dependencies:

Ensure you have the Spring Security dependencies in your pom.xml:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>

Security Configuration:

In your WebSecurityConfigurerAdapter configuration:

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private DataSource dataSource;  // Inject your DataSource bean (e.g., for connecting to a database)

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            // ... other configurations
            .formLogin()
                .loginPage("/login")
                .defaultSuccessURL("/home")
                .permitAll()
            .and()
            .rememberMe()
                .key("uniqueAndSecret")  // A secret key to make the token secure
                .tokenValiditySeconds(1209600)  // Specifies time in seconds the token is valid for. E.g., 2 weeks.
                .dataSource(dataSource)  // Set the data source for token persistence
                .tokenRepository(persistentTokenRepository())  // Configure token repository
            .and()
            .logout()
                .logoutSuccessURL("/login?logout")
                .permitAll();
    }

    @Bean
    public PersistentTokenRepository persistentTokenRepository() {
        JdbcTokenRepositoryImpl tokenRepository = new JdbcTokenRepositoryImpl();
        tokenRepository.setDataSource(dataSource);
        return tokenRepository;
    }

    // ... other beans and configurations
}

In the configuration above:

The .key("uniqueAndSecret") method sets a key for token generation/validation.
The .tokenValiditySeconds(1209600) method sets the duration the token remains valid (e.g., 2 weeks in the example).
We're using a JDBC-based token repository (JdbcTokenRepositoryImpl) which will persist the tokens in a database.

Database Configuration:

If you're using JdbcTokenRepositoryImpl, you need a table in your database to store the tokens. Here's a common schema that Spring Security uses:

CREATE TABLE persistent_logins (
    username VARCHAR(64) NOT NULL,
    series VARCHAR(64) PRIMARY KEY,
    token VARCHAR(64) NOT NULL,
    last_used TIMESTAMP NOT NULL
);

Login Form:

Update your login form to include a "Remember Me" checkbox:

<form action="/login" method="post">
    <!-- ... other form fields -->
    <div>
        <input type="checkbox" name="remember-me"/> Remember Me
    </div>
    <div>
        <input type="submit" value="Login"/>
    </div>
</form>

Running:
With these configurations, when a user checks the "Remember Me" option and logs in, a persistent token will be stored in the database, and a cookie will be set on the user's browser. On subsequent visits, even after the session expires, the user will be authenticated as long as the remember-me token is valid.

Note: Remember to handle the token securely. If the remember-me token is compromised, attackers might impersonate users. Make sure to use HTTPS to encrypt traffic between the client and the server, especially in production environments.

Configuring Remember Me in Spring Security:
- Description: This topic covers the basic configuration of the Remember Me feature in Spring Security, allowing users to stay authenticated across sessions.
- Code:
```
@Override
protected void configure(HttpSecurity http) throws Exception {
    http
        .rememberMe()
            .key("uniqueAndSecret");
}
```
Spring Security Remember Me example:
- Description: Provides a simple example of Remember Me functionality in a Spring Security configuration.
- Code:
```
@Override
protected void configure(HttpSecurity http) throws Exception {
    http
        .rememberMe();
}
```
Customizing Remember Me functionality in Spring Security:
- Description: Demonstrates how to customize Remember Me behavior, such as using a custom token, extending the RememberMeServices interface, etc.
- Code:
```
@Override
protected void configure(HttpSecurity http) throws Exception {
    http
        .rememberMe()
            .rememberMeServices(customRememberMeServices());
}
```

Remember Me authentication in Spring Boot:

Description: Shows how to enable Remember Me authentication in a Spring Boot application.

Code:

@SpringBootApplication
public class MyApplication {
    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }
}

Configuring Remember Me services in Spring Security:

Description: Details the configuration options for Remember Me services in Spring Security.

Code:

@Override
protected void configure(HttpSecurity http) throws Exception {
    http
        .rememberMe()
            .tokenValiditySeconds(60 * 60 * 24); // 1 day
}

Secure authentication with Spring Security Remember Me feature:

Description: Emphasizes the security aspects of using the Remember Me feature and best practices.

Code:

@Override
protected void configure(HttpSecurity http) throws Exception {
    http
        .rememberMe()
            .key("secureKey")
            .tokenValiditySeconds(60 * 30); // 30 minutes
}

Remember Me with Spring Security and custom login forms:
- Description: Integrates Remember Me functionality with custom login forms in a Spring Security configuration.
- Code:
```
@Override
protected void configure(HttpSecurity http) throws Exception {
    http
        .rememberMe()
            .userDetailsService(customUserDetailsService());
}
```
Configuring Remember Me with Spring Security XML configuration:
- Description: Shows how to configure Remember Me using XML configuration in Spring Security.
- Code:
```
<http>
    <remember-me key="uniqueAndSecret" />
</http>
```
Remember Me authentication and session management in Spring Security:
- Description: Explains the interaction between Remember Me authentication and session management in Spring Security.
- Code:
```
@Override
protected void configure(HttpSecurity http) throws Exception {
    http
        .sessionManagement()
            .sessionCreationPolicy(SessionCreationPolicy.IF_REQUIRED);
}
```
Enabling automatic login with Remember Me in Spring Security:
- Description: Describes how automatic login works when Remember Me is enabled in Spring Security.
- Code:
```
@Override
protected void configure(HttpSecurity http) throws Exception {
    http
        .rememberMe()
            .useSecureCookie(true);
}
```

Using Remember Me with Spring Security and Spring Boot:

Description: Demonstrates how to integrate Remember Me with Spring Boot applications.

Code:

@SpringBootApplication
public class MyApplication {
    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }
}

Configuring token validity period for Remember Me in Spring Security:

Description: Explains how to set the validity period for Remember Me tokens in Spring Security.

Code:

@Override
protected void configure(HttpSecurity http) throws Exception {
    http
        .rememberMe()
            .tokenValiditySeconds(60 * 60 * 24 * 7); // 1 week
}

Remember Me and CSRF protection in Spring Security:

Description: Describes the interaction between Remember Me and CSRF protection in Spring Security.

Code:

@Override
protected void configure(HttpSecurity http) throws Exception {
    http
        .csrf().csrfTokenRepository(CookieCsrfTokenRepository.withHttpOnlyFalse());
}