Administrador de autenticación personalizado con Spring Security y configuración de Java

Solución:

Eche un vistazo a mi muestra a continuación. Debe devolver un UsernamePasswordAuthenticationToken. Contiene el principal y las Autoridades concedidas. Espero poder ayudar 🙂

public Authentication authenticate(Authentication authentication) throws AuthenticationException {
    String username = authentication.getPrincipal() + "";
    String password = authentication.getCredentials() + "";

    User user = userRepo.findOne(username);
    if (user == null) {
        throw new BadCredentialsException("1000");
    }
    if (!encoder.matches(password, user.getPassword())) {
        throw new BadCredentialsException("1000");
    }
    if (user.isDisabled()) {
        throw new DisabledException("1001");
    }
    List<Right> userRights = rightRepo.getUserRights(username);
    return new UsernamePasswordAuthenticationToken(username, null, userRights.stream().map(x -> new SimpleGrantedAuthority(x.getName())).collect(Collectors.toList()));
}

PD: userRepo y rightRepo son repositorios Spring-Data-JPA que acceden a mi User-DB personalizado

SpringSecurity JavaConfig:

@Configuration
@EnableWebMvcSecurity
public class MySecurityConfiguration extends WebSecurityConfigurerAdapter {

public MySecurityConfiguration() {
    super(false);
}

@Override
protected AuthenticationManager authenticationManager() throws Exception {
    return new ProviderManager(Arrays.asList((AuthenticationProvider) new AuthProvider()));
}

}

En su forma más simple:

@Override
    public Authentication authenticate(Authentication auth) throws AuthenticationException {
        String username = auth.getName();
        String password = auth.getCredentials().toString();
        // to add more logic
        List<GrantedAuthority> grantedAuths = new ArrayList<>();
        grantedAuths.add(new SimpleGrantedAuthority("ROLE_USER"));
        return new UsernamePasswordAuthenticationToken(username, password, grantedAuths);
    }

Primero debe configurar Spring Security para usar su AuthenticationProvider personalizado. Entonces, en su spring-security.xml (o archivo de configuración equivalente) debe definir qué clase está implementando esta característica. Por ejemplo:

<authentication-manager alias="authenticationManager">
    <authentication-provider ref="myAuthenticationProvider" />
</authentication-manager>

<!-- Bean implementing AuthenticationProvider of Spring Security -->
<beans:bean id="myAuthenticationProvider" class="com.teimas.MyAutenticationProvider">
</beans:bean>

En segundo lugar, debe implementar AuthenticationProvider como en su ejemplo. Especialmente el método de autenticación (Autenticación de autenticación) en el que debe estar su llamada de descanso. Por ejemplo:

public Authentication authenticate(Authentication authentication) throws AuthenticationException {
    User user = null;
    try {
        //use a rest service to find the user. 
        //Spring security provides user login name in authentication.getPrincipal()
            user = userRestService.loadUserByUsername(authentication.getPrincipal().toString());
    } catch (Exception e) {
        log.error("Error loading user, not found: " + e.getMessage(), e);
    }

    if (user == null) {
        throw new UsernameNotFoundException(String.format("Invalid credentials", authentication.getPrincipal()));
    } else if (!user.isEnabled()) {
        throw new UsernameNotFoundException(String.format("Not found enabled user for username ", user.getUsername()));
    }
    //check user password stored in authentication.getCredentials() against stored password hash
    if (StringUtils.isBlank(authentication.getCredentials().toString())
        || !passwordEncoder.isPasswordValid(user.getPasswordHash(), authentication.getCredentials().toString()) {
        throw new BadCredentialsException("Invalid credentials");
    }

    //doLogin makes whatever is necesary when login is made (put info in session, load other data etc..)
    return doLogin(user);
} 

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