Symfony Ldap checkPassword

I’m using Symfony 4.4 and I’m doing my own authenticator. Everything works fine, I just can’t figure out how to compare the password entered by the user and the one in Ldap. I would like to do this in the "checkCredentials" method in my LoginFormAuthenticator. Here is my LdapUserProvider:

class LdapUserProvider implements UserProviderInterface, PasswordUpgraderInterface
{
    private $ldap;
    private $baseDn;
    private $searchDn;
    private $searchPassword;
    private $defaultRoles;
    private $uidKey;
    private $defaultSearch;
    private $passwordAttribute;
    private $extraFields;
    //New
    private $em;

    public function __construct(Ldap $ldap, string $baseDn, EntityManagerInterface $em , string $searchDn = null, string $searchPassword = null, array $defaultRoles = [], string $uidKey = null, string $filter = null, string $passwordAttribute = null, array $extraFields = [])
    {
        if (null === $uidKey) {
            $uidKey = 'sAMAccountName';
        }

        if (null === $filter) {
            $filter = '({uid_key}={username})';
        }

        $this->ldap = $ldap;
        $this->baseDn = $baseDn;
        $this->searchDn = $searchDn;
        $this->searchPassword = $searchPassword;
        $this->defaultRoles = $defaultRoles;
        $this->uidKey = $uidKey;
        $this->defaultSearch = str_replace('{uid_key}', $uidKey, $filter);
        $this->passwordAttribute = $passwordAttribute;
        $this->extraFields = $extraFields;
        $this->em = $em;
    }

    /**
     * {@inheritdoc}
     */
    public function loadUserByUsername($username)
    {
        try {
            $this->ldap->bind($this->searchDn, $this->searchPassword);
            $username = $this->ldap->escape($username, '', LdapInterface::ESCAPE_FILTER);
            $query = str_replace('{username}', $username, $this->defaultSearch);
            $search = $this->ldap->query($this->baseDn, $query);
        } catch (ConnectionException $e) {
            throw new UsernameNotFoundException(sprintf('User "%s" not found.', $username), 0, $e);
        }

        $entries = $search->execute();
        $count = count($entries);

        if (!$count) {
            throw new UsernameNotFoundException(sprintf('User "%s" not found.', $username));
        }

        if ($count > 1) {
            throw new UsernameNotFoundException('More than one user found.');
        }

        return $this->loadUser($username, $entries[0]);
    }

    /**
     * {@inheritdoc}
     */
    public function refreshUser(UserInterface $user)
    {
        if (!$user instanceof LdapUser || !$user instanceof User) {
            throw new UnsupportedUserException(sprintf('Instances of "%s" are not supported.', get_class($user)));
        }

        //New
        $userRepository = $this->em->getRepository("AppBundle:User");
        $user = $userRepository->findOneBy(array("username" => $user->getUsername()));

        if($user === null){
            throw new UnsupportedUserException(sprintf('Instances of "%s" are not supported.', get_class($user)));
        }

        return new LdapUser($user->getEntry(), $user->getUsername(), $user->getPassword(), $user->getRoles(), $user->getExtraFields());
    }

    /**
     * {@inheritdoc}
     */
    public function upgradePassword(UserInterface $user, string $newEncodedPassword): void
    {
        if (!$user instanceof LdapUser) {
            throw new UnsupportedUserException(sprintf('Instances of "%s" are not supported.', get_class($user)));
        }

        if (null === $this->passwordAttribute) {
            return;
        }

        try {
            $user->getEntry()->setAttribute($this->passwordAttribute, [$newEncodedPassword]);
            $this->ldap->getEntryManager()->update($user->getEntry());
            $user->setPassword($newEncodedPassword);
        } catch (ExceptionInterface $e) {
            // ignore failed password upgrades
        }
    }

    /**
     * {@inheritdoc}
     */
    public function supportsClass($class)
    {
        return LdapUser::class === $class;
    }

    /**
     * Loads a user from an LDAP entry.
     *
     * @param $username
     * @param Entry $entry
     * @return UserInterface
     */
    protected function loadUser($username, Entry $entry)
    {
        /*
        $password = null;
        $extraFields = [];
        var_dump($this->passwordAttribute);
        if (null !== $this->passwordAttribute) {
            var_dump($this->passwordAttribute);
            $password = $this->getAttributeValue($entry, $this->passwordAttribute);
            var_dump($password);
        }

        foreach ($this->extraFields as $field) {
            $extraFields[$field] = $this->getAttributeValue($entry, $field);
        }
        exit();
        return new LdapUser($entry, $username, $password, $this->defaultRoles, $extraFields);*/

        $userRepository = $this->em->getRepository("App:User");
        //On récupère les infos de l'utilisateur qui se connecte
        $user = $userRepository->findOneBy(array("username" => $username));

        //Si l'utilisateur est null, donc pas présent en BDD mais OK niveau LDAP
        if ($user === null) {
            //Créé un User pour l'ajouter à la BDD une fois qu'on s'est assuré que c'était bien un utilisateur LDAP
            //Cas première connexion de l'utilisateur
            $user = new User();
            $user->setFirstname($entry->getAttribute("givenName")[0]);
            $user->setLastname($entry->getAttribute("sn")[0]);
            $user->setEmail($entry->getAttribute("mail")[0]);
            $user->setUsername($entry->getAttribute("uid")[0]);
            $user->setRoles($this->defaultRoles);

            $this->em->persist($user);
            $this->em->flush();
        } else {
            $this->em->flush();
        }

        return $user;
    }

    public function checkPassword($password){

    }

    /**
     * Fetches the password from an LDAP entry.
     *
     * @param null|Entry $entry
     */
    private function getPassword(Entry $entry)
    {
        if (null === $this->passwordAttribute) {
            return;
        }

        if (!$entry->hasAttribute($this->passwordAttribute)) {
            throw new InvalidArgumentException(sprintf('Missing attribute "%s" for user "%s".', $this->passwordAttribute, $entry->getDn()));
        }

        $values = $entry->getAttribute($this->passwordAttribute);

        if (1 !== count($values)) {
            throw new InvalidArgumentException(sprintf('Attribute "%s" has multiple values.', $this->passwordAttribute));
        }

        return $values[0];
    }

    private function getAttributeValue(Entry $entry, string $attribute)
    {
        var_dump("getAttributeValue ".$attribute);
        if (!$entry->hasAttribute($attribute)) {
            throw new InvalidArgumentException(sprintf('Missing attribute "%s" for user "%s".', $attribute, $entry->getDn()));
        }

        $values = $entry->getAttribute($attribute);

        if (1 !== count($values)) {
            throw new InvalidArgumentException(sprintf('Attribute "%s" has multiple values.', $attribute));
        }

        return $values[0];
    }
}

I first thought about using the getPassword method but it requires and Entry, and I don’t know how to get this Entry. Thanks

Source: Symfony4 Questions

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