Make DaoAuthenticationProvider Work with the AuthenticationManager after WebSecurityConfigurerAdapter Deprecation - spring

Question

I am creating a complete user login and registration Backend system with Email Verification and usage of PostgreSQL to store the user's credentials. I've come to a point where I am having problems at the security layer. To be more specific I am having the following code which since WebSecurityConfigurerAdapter deprecation, I want to change:
OLD VERSION BEFORE DEPRECATION
#Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
auth.authenticationProvider(daoAuthenticationProvider());
}
#Bean
public DaoAuthenticationProvider daoAuthenticationProvider() {
DaoAuthenticationProvider provider =
new DaoAuthenticationProvider();
provider.setPasswordEncoder(bCryptPasswordEncoder);
provider.setUserDetailsService(applicationUserService);
return provider;
}
I've searched this question and found that AuthenticationManagerBuilder can now be accessed as follows:
NEWEST VERSION OF AUTHENTICATION MANAGER
#Bean
public AuthenticationManager authenticationManager(AuthenticationConfiguration authenticationConfiguration) throws Exception {
return authenticationConfiguration.getAuthenticationManager();
}
My problem is that I can't find a way to inject my daoAuthenticationProvider to the newest method of AuthenticationManager. Any proposals???

Answer 1

You should not need the AuthenticationConfiguration for that, you could just create your own bean, like so:
#Bean
public AuthenticationManager authenticationManager(PasswordEncoder passwordEncoder, UserDetailsService userDetailsService) {
DaoAuthenticationProvider provider = new DaoAuthenticationProvider();
provider.setPasswordEncoder(passwordEncoder);
provider.setUserDetailsService(userDetailsService);
return new ProviderManager(provider);
}

Answer 2

Adding a custom authentication provider is configured in the SecurityFilterChain bean. Although looking at the given code, standard DAO authentication would automatically be added with http.formLogin() without the need for an AuthenticationProvider.
#Bean
public SecurityFilterChain filterChain(DaoAuthenticationProvider daoAuthenticationProvider) throws Exception
{
http.authenticationProvider(daoAuthenticationProvider);
return http.build();
}
See also https://spring.io/blog/2022/02/21/spring-security-without-the-websecurityconfigureradapter