gistfile1.php

<?php

namespace Application\Entity\Repository;

use Application\Entity\Usuario;
use Doctrine\ORM\EntityRepository;

class UsuarioRepository extends EntityRepository
{
    public function findByLoginAndPassword(Usuario $usuario, $login, $password)
    {
        /**
         * @var $userLogin \Application\Entity\Usuario
         */
        $userLogin = $this->createQueryBuilder('u')
            ->where('u.login = :a1')
            ->setParameter('a1', $login)->getQuery()->getOneOrNullResult();

        if(!is_null($userLogin)){
            $usuario->setSalt($userLogin->getSalt());

            if($usuario->encryptPassword($password) == $userLogin->getPassword()){
                return $userLogin;
            }
        }

        return false;

    }

}