Authenticationmanager must be specified

by

The error “authenticationmanager must be specified” occurs when using Spring Security and not properly configuring the Authentication Manager.

The Authentication Manager is a crucial component in Spring Security that handles user authentication and authorization. It is responsible for validating user credentials, such as username and password, and granting or denying access to secured resources.

To fix the error, you need to ensure that the Authentication Manager is correctly configured in your Spring Security configuration file (usually named “SecurityConfig.java” or similar). Here’s an example of how you can configure the Authentication Manager: 

    
import org.springframework.context.annotation.Bean;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    // ...

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    // ...

}

In the example above, the Authentication Manager is exposed as a Bean using the authenticationManagerBean() method. This makes it accessible throughout your application.

It’s important to note that the Authentication Manager requires a user details service for user retrieval and password encoding. Make sure to configure these dependencies as well. For brevity, they are not shown in the example above.

With the Authentication Manager properly configured, you can now use it in other parts of your application, such as in Spring Security filters or authentication providers.

Read more

Leave a comment