A simple User authentication setup to copy & paste into your Symfony 3.4 install

README.md

This gist is an opiniated version of a simple user registration, login, password resetting workflow, that takes a couple of minutes to setup and just works. This is php7.x compatible only (because you should probably be using it anyway), and if you insiste on having php5.x just remove the annotations in the User.php entity file. Everything is available in the security page in the Symfony documentation: https://symfony.com/doc/3.4/security.html

login.html.twig

{% extends 'base.html.twig' %}

{% block body %}
    {{ form(form) }}
{% endblock %}

NewPasswordType.php

<?php

namespace AppBundle\Form;


use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\PasswordType;
use Symfony\Component\Form\Extension\Core\Type\RepeatedType;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;
use Symfony\Component\Form\FormBuilderInterface;

class NewPasswordType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('password', RepeatedType::class, ['type' => PasswordType::class])
            ->add('submit', SubmitType::class);
    }
}

PasswordRequestType.php

<?php

namespace AppBundle\Form;


use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\EmailType;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;
use Symfony\Component\Form\FormBuilderInterface;

class PasswordRequestType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('email', EmailType::class)
            ->add('send', SubmitType::class);
    }
}

register.html.twig

{% extends 'base.html.twig' %}

{% block body %}
    <p>Register here</p>
    {{ form(form) }}
{% endblock %}

RegistrationController.php

<?php

namespace AppBundle\Controller;


use AppBundle\Entity\User;
use AppBundle\Form\RegistrationFormType;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Session\SessionInterface;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
use Symfony\Component\Security\Core\Encoder\UserPasswordEncoderInterface;

class RegistrationController extends Controller
{
    /**
     * @Route("/register", name="register", methods={"GET", "POST"})
     */
    public function register(
        Request $request,
        UserPasswordEncoderInterface $encoder,
        TokenStorageInterface $tokenStorage,
        EntityManagerInterface $entityManager,
        SessionInterface $session
    ) {
        $user = new User();
        $form = $this->createForm(RegistrationFormType::class, $user);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $password = $encoder->encodePassword($user, $user->getPlainPassword());
            $user->setPassword($password);

            $entityManager->persist($user);
            $entityManager->flush();
            $this->addFlash('success', "Your accound was created");

            $token = new UsernamePasswordToken($user, $password, 'main');
            $tokenStorage->setToken($token);
            $session->set('_security_main', serialize($token));

            return $this->redirectToRoute('homepage');
        }

        return $this->render(
            'register.html.twig',
            [
                'form' => $form->createView(),
            ]
        );
    }
}

reset-password-confirm.html.twig

{% extends 'base.html.twig' %}

{% block body %}
    <p>Please enter a new password.</p>
    {{ form(form) }}
{% endblock %}

reset-password.html.twig

{% extends 'base.html.twig' %}

{% block body %}
    <p>We will send a resetting link to your account email.</p>
    {{ form(form) }}
{% endblock %}

ResettingController.php

<?php

namespace AppBundle\Controller;

use AppBundle\Entity\User;
use AppBundle\Form\NewPasswordType;
use AppBundle\Form\PasswordRequestType;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Session\SessionInterface;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
use Symfony\Component\Security\Core\Encoder\UserPasswordEncoderInterface;

class ResettingController extends Controller
{
    /**
     * @Route("/reset_password", name="reset_password", methods={"GET", "POST"})
     */
    public function resetPassword(
        Request $request,
        EntityManagerInterface $entityManager
    ) {
        $form = $this->createForm(PasswordRequestType::class);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $email = $form->get('email')->getData();
            $token = bin2hex(random_bytes(32));
            $user = $entityManager->getRepository(User::class)->findOneBy(['email' => $email]);

            if ($user instanceof User) {
                $user->setPasswordRequestToken($token);
                $entityManager->flush();
                // send your email with SwiftMailer or anything else here
                $this->addFlash('success', "An email has been sent to your address");

                return $this->redirectToRoute('reset_password');
            }
        }

        return $this->render('reset-password.html.twig', ['form' => $form->createView()]);
    }

    /**
     * @Route("/reset_password/confirm/{token}", name="reset_password_confirm", methods={"GET", "POST"})
     */
    public function resetPasswordCheck(
        Request $request,
        string $token,
        EntityManagerInterface $entityManager,
        UserPasswordEncoderInterface $encoder,
        TokenStorageInterface $tokenStorage,
        SessionInterface $session
    ) {
        $user = $entityManager->getRepository(User::class)->findOneBy(['passwordRequestToken' => $token]);

        if (!$token || !$user instanceof User) {
            $this->addFlash('danger', "User not found");

            return $this->redirectToRoute('reset_password');
        }

        $form = $this->createForm(NewPasswordType::class);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $plainPassword = $form->get('password')->getData();
            $password = $encoder->encodePassword($user, $plainPassword);
            $user->setPassword($password);
            $user->setPasswordRequestToken(null);
            $entityManager->flush();

            $token = new UsernamePasswordToken($user, $password, 'main');
            $tokenStorage->setToken($token);
            $session->set('_security_main', serialize($token));

            $this->addFlash('success', "Your new password has been set");

            return $this->redirectToRoute('homepage');
        }

        return $this->render('reset-password-confirm.html.twig', ['form' => $form->createView()]);

    }
}

security.yml

security:
    encoders:
        AppBundle\Entity\User:
            algorithm: bcrypt

    providers:
        app_users:
            entity: { class: AppBundle\Entity\User, property: email }

    role_hierarchy:
        ROLE_ADMIN:       ROLE_USER

    firewalls:
        dev:
            pattern: ^/(_(profiler|wdt|error)|css|images|js)/
            security: false
        main:
            pattern: ^/
            form_login:
                provider: app_users
                login_path: login
                check_path: login
            logout:
                path:   /logout
                target: /
            anonymous:    true
    access_control:
        - { path: ^/login, role: IS_AUTHENTICATED_ANONYMOUSLY }
        - { path: ^/register, role: IS_AUTHENTICATED_ANONYMOUSLY }
        - { path: ^/reset_password, role: IS_AUTHENTICATED_ANONYMOUSLY }
        - { path: ^/, role: ROLE_USER }

SecurityController.php

<?php

namespace AppBundle\Controller;


use AppBundle\Form\UserLoginType;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\Security\Http\Authentication\AuthenticationUtils;

class SecurityController extends Controller
{
    /**
     * @Route("/login", name="login", methods={"GET", "POST"})
     */
    public function login(AuthenticationUtils $authenticationUtils)
    {
        $error = $authenticationUtils->getLastAuthenticationError();
        $lastUsername = $authenticationUtils->getLastUsername();
        $form = $this->createForm(UserLoginType::class);

        return $this->render(
            'login.html.twig',
            [
                'form'          => $form->createView(),
                'last_username' => $lastUsername,
                'error'         => $error,
            ]
        );
    }
}

User.php

<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
use Symfony\Component\Security\Core\User\UserInterface;


/**
 * @ORM\Entity(repositoryClass="AppBundle\Repository\UserRepository")
 * @ORM\Table(name="app_user")
 * @UniqueEntity("email")
 */
class User implements UserInterface
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @var string
     *
     * @ORM\Column(type="string", length=180, unique=true)
     */
    protected $email;

    /**
     * @var string
     *
     * @ORM\Column(name="password", type="string", length=100)
     */
    protected $password;

    /**
     * @var string|null
     */
    protected $plainPassword;

    /**
     * @var string|null
     *
     * @ORM\Column(type="string", length=255, nullable=true)
     */
    protected $passwordRequestToken;

    /**
     * @var array $roles
     *
     * @ORM\Column(type="array")
     */
    private $roles = ['ROLE_USER'];

    /**
     * @return mixed
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * @return string
     */
    public function getEmail(): string
    {
        return $this->email;
    }

    /**
     * @param string $email
     *
     * @return User
     */
    public function setEmail(string $email): User
    {
        $this->email = $email;

        return $this;
    }

    /**
     * @return string
     */
    public function getPassword(): string
    {
        return $this->password;
    }

    /**
     * @param string $password
     *
     * @return User
     */
    public function setPassword(string $password): User
    {
        $this->password = $password;

        return $this;
    }

    /**
     * @return null|string
     */
    public function getPlainPassword(): ?string
    {
        return $this->plainPassword;
    }

    /**
     * @param null|string $plainPassword
     *
     * @return User
     */
    public function setPlainPassword(?string $plainPassword): User
    {
        $this->plainPassword = $plainPassword;

        return $this;
    }

    /**
     * @return null|string
     */
    public function getPasswordRequestToken(): ?string
    {
        return $this->passwordRequestToken;
    }

    /**
     * @param null|string $passwordRequestToken
     *
     * @return User
     */
    public function setPasswordRequestToken(?string $passwordRequestToken): User
    {
        $this->passwordRequestToken = $passwordRequestToken;

        return $this;
    }

    /**
     * @return array
     */
    public function getRoles(): array
    {
        return $this->roles;
    }

    /**
     * @param array $roles
     *
     * @return User
     */
    public function setRoles(array $roles): User
    {
        $this->roles = $roles;

        return $this;
    }

    /**
     * @return string|null The salt
     */
    public function getSalt()
    {
        return null;
    }

    /**
     * @return string The username
     */
    public function getUsername(): string
    {
        return $this->email;
    }

    /**
     * Removes sensitive data from the user.
     */
    public function eraseCredentials(): void
    {
        $this->plainPassword = null;
    }
}

UserLoginType.php

<?php

namespace AppBundle\Form;


use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\PasswordType;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\FormBuilderInterface;

class UserLoginType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('_username', TextType::class)
            ->add('_password', PasswordType::class)
            ->add('submit', SubmitType::class);
    }

    public function getBlockPrefix()
    {
        return null;
    }
}

UserRegistrationType.php

<?php

namespace AppBundle\Form;


use AppBundle\Entity\User;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\EmailType;
use Symfony\Component\Form\Extension\Core\Type\PasswordType;
use Symfony\Component\Form\Extension\Core\Type\RepeatedType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;

class UserRegistrationType extends AbstractType
{
    /**
     * {@inheritdoc}
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('email', EmailType::class)
            ->add('plainPassword', RepeatedType::class, ['type' => PasswordType::class])
            ->add('submit', SubmitType::class);
    }

    /**
     * @param OptionsResolver $resolver
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(['data_class' => User::class]);
    }

    public function getBlockPrefix()
    {
        return null;
    }
}