SpringSecurity Authentication

CustomAuthenticationProvider.java

@Component
public class CustomAuthenticationProvider implements AuthenticationProvider {

    @Autowired
    private AuthServiceImpl authService;

    @Override
    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
        String username = authentication.getName();
        String password = (String) authentication.getCredentials();

        AdminUser user = (AdminUser) authService.loadUserByUsername(username);

        if (user == null || !user.getUsername().equalsIgnoreCase(username)) {
            throw new BadCredentialsException("Username not found.");
        }

        BCryptPasswordEncoder passwordEncoder = new BCryptPasswordEncoder();

        if (!passwordEncoder.matches(password, user.getPassword())) {
            throw new BadCredentialsException("Wrong password.");
        }

        Collection<? extends GrantedAuthority> authorities = user.getAuthorities();

        return new UsernamePasswordAuthenticationToken(user, password, authorities);
    }

    @Override
    public boolean supports(Class<?> aClass) {
        return true;
    }
}

InMemoryAuthentication.java

@Configuration
@EnableWebSecurity
public class WebMvcConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication()
                .withUser("userName")
                .password("password")
                .roles("ADMIN")
        ;
    }
}

JdbcAuthentication.java

@Configuration
@EnableWebSecurity
public class WebMvcConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.jdbcAuthentication().dataSource(dataSource)
                .usersByUsernameQuery(
                        "select username, password, enabled from admin_users where username=?")
                .authoritiesByUsernameQuery(
                        "select username, role from user_roles where username=?")
        ;
    }
}

UserDetailsServiceAuthentication.java

@Configuration
@EnableWebSecurity
public class WebMvcConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(adminService)
        ;
    }
}