Adding additional details to principal object stored in spring security context

In order to add more details to the authenticated user. You need to first create your own implementation of the User object which should extend the spring security User object. After that you can add the properties you want to add to the authenticated user. Once this is done you need to return your implementation of the user object in UserDetailService (If you are not using LDAP for authentication). This link provides the details for adding more details to the authenticated user--

http://javahotpot.blogspot.com/2013/12/spring-security-adding-more-information.html

Here is what you need:

1. Extend spring User (org.springframework.security.core.userdetails.User) class and what ever properties you need.
2. Extend spring UserDetailsService (org.springframework.security.core.userdetails.UserDetailsService) and fill the above object. Override loadUserByUsername and return your extended user class
3. Set your custom UserDetailsService in AuthenticationManagerBuilder

For example

public class CurrentUser extends User{

   //This constructor is a must
    public CurrentUser(String username, String password, boolean enabled, boolean accountNonExpired,
            boolean credentialsNonExpired, boolean accountNonLocked,
            Collection<? extends GrantedAuthority> authorities) {
        super(username, password, enabled, accountNonExpired, credentialsNonExpired, accountNonLocked, authorities);
    }
    //Setter and getters are required
    private String firstName;
    private String lastName;

}

The Custom userdetails could be:

@Service("userDetailsService")
public class CustomUserDetailsService implements UserDetailsService {

@Override
public UserDetails loadUserByUsername(final String username) throws UsernameNotFoundException {

    //Try to find user and its roles, for example here we try to get it from database via a DAO object
   //Do not confuse this foo.bar.User with CurrentUser or spring User, this is a temporary object which holds user info stored in database
    foo.bar.User user = userDao.findByUserName(username);

    //Build user Authority. some how a convert from your custom roles which are in database to spring GrantedAuthority
    List<GrantedAuthority> authorities = buildUserAuthority(user.getUserRole());

    //The magic is happen in this private method !
    return buildUserForAuthentication(user, authorities);

}


//Fill your extended User object (CurrentUser) here and return it
private User buildUserForAuthentication(foo.bar.User user, 
List<GrantedAuthority> authorities) {
    String username = user.getUsername();
    String password = user.getPassword();
    boolean enabled = true;
    boolean accountNonExpired = true;
    boolean credentialsNonExpired = true;
    boolean accountNonLocked = true;

    return new CurrentUser(username, password, enabled, accountNonExpired, credentialsNonExpired,
            accountNonLocked, authorities);
   //If your database has more information of user for example firstname,... You can fill it here 
  //CurrentUser currentUser = new CurrentUser(....)
  //currentUser.setFirstName( user.getfirstName() );
  //.....
  //return currentUser ;
}

private List<GrantedAuthority> buildUserAuthority(Set<UserRole> userRoles) {

    Set<GrantedAuthority> setAuths = new HashSet<GrantedAuthority>();

    // Build user's authorities
    for (UserRole userRole : userRoles) {
        setAuths.add(new SimpleGrantedAuthority(userRole.getRole()));
    }

    return new ArrayList<GrantedAuthority>(setAuths);
}

}

Configure the spring security context

@Configuration
@EnableWebSecurity
@PropertySource("classpath://configs.properties")
public class SecurityContextConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    @Qualifier("userDetailsService")
    private UserDetailsService userDetailsService;

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService);
    }

It's all done !

You can call (CurrentUser)getAuthentication().getPrincipal() to get you newly CurrentUser or set some properties.