<?php

//login.html.twig -------------------------------------

        <form action=" {{ path ( '_login_check' ) }} " method="post" class="form_login">
            <ul>
                <li class="user"><input type="text" name="_username" class="input_login" value="{{ last_username }}" /></li>
                <li class="password"><input type="password" name="_password" class="input_login" /></li>
                <li><input class="sub_log" name="login" type="submit" /></li>
            </ul>
        </form>

//config.yml -------------------------------------

    encoders:
        Bundle\SecurityBundle\Entity\User: sha1

    providers:
        main:
            password_encoder: sha1
            entity: { class: SecurityBundle:User, property: username }

    firewalls:
        profiler:
            pattern:    /_profiler/.*
            security:  false

        main:
            pattern:    /.*
            anonymous: true
            form_login:
                always_use_default_target_path: true
                login_path: /
            logout:     { path: /logout, target: / }

    access_control:
        - { path: /top, role: ROLE_ADMIN }
        - { path: /.*, role: IS_AUTHENTICATED_ANONYMOUSLY }



/entity/User.php -------------------------------------

use Symfony\Component\Security\User\AccountInterface;

/**
 * @orm:Entity
 */
class User implements AccountInterface
{
    /**
     * @orm:Id
     * @orm:Column(type="integer")
     * @orm:GeneratedValue(strategy="IDENTITY")
     */
    protected $id;


     /**
     * @orm:Column(type="string", length="255")
     */
    protected $password;

    /**
     * @orm:Column(type="string", length="255")
     */
    protected $username;


    /**
     * @orm:Column(type="string", length="255")
     */
    protected $name;



    public function getId()
    {
        return $this->id;
    }

    public function setName($name)
    {
        $this->name = $name;
    }

    public function getName()
    {
        return $this->name;
    }

    public function setUsername($username)
    {
        $this->username = $username;
    }

    public function getUsername()
    {
        return $this->username;
    }



    // Acount interface

    public function __toString(){

        return $this->getUsername();

    }

    public function getRoles(){

        return array('ROLE_ADMIN');

    }

    public function eraseCredentials(){

    }

    public function getSalt(){

        return '';

    }

    public function getPassword(){

        return $this->password;

    }

    public function setPassword($password){

        $this->password = $password;

    }

    public function equals(AccountInterface $account){

        if($this->getUsername() == $account->getUsername()){

            return true;
        }

        return false;

    }

}

/controller/SecurityController.php -------------------------------------


namespace Bundle\SecurityBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\Security\SecurityContext;
use Bundle\SecurityBundle\Document;

use Bundle\SecurityBundle\Entity\User;
use Bundle\SecurityBundle\Entity\UserRepository;

class SecurityController extends Controller {

     public function loginAction (){

         // get the error if any (works with forward and redirect -- see below)
         if ( $this -> get ( 'request' ) -> attributes -> has ( SecurityContext :: AUTHENTICATION_ERROR )) {
             $error = $this -> get ( 'request' ) -> attributes -> get ( SecurityContext :: AUTHENTICATION_ERROR );
         } else {
             $error = $this -> get ( 'request' ) -> getSession () -> get ( SecurityContext :: AUTHENTICATION_ERROR );
         }


         return $this -> render ( 'SecurityBundle:Security:login.html.twig' , array (
             // last username entered by the user
             'last_username' => $this -> get ( 'request' ) -> getSession () -> get ( SecurityContext :: LAST_USERNAME ),
             'error' => $error ,
         ));
     }

}

?>