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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Security\Acl\Voter;
use Psr\Log\LoggerInterface;
use Symfony\Component\Security\Acl\Exception\AclNotFoundException;
use Symfony\Component\Security\Acl\Exception\NoAceFoundException;
use Symfony\Component\Security\Acl\Model\AclProviderInterface;
use Symfony\Component\Security\Acl\Model\ObjectIdentityInterface;
use Symfony\Component\Security\Acl\Model\ObjectIdentityRetrievalStrategyInterface;
use Symfony\Component\Security\Acl\Model\SecurityIdentityRetrievalStrategyInterface;
use Symfony\Component\Security\Acl\Permission\PermissionMapInterface;
use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
use Symfony\Component\Security\Core\Authorization\Voter\VoterInterface;
if (class_exists(\Symfony\Component\Security\Core\Security::class)) {
/**
* @internal
*/
trait AclVoterTrait
{
public function vote(TokenInterface $token, $subject, array $attributes)
{
return $this->doVote($token, $subject, $attributes);
}
}
} else {
/**
* @internal
*/
trait AclVoterTrait
{
public function vote(TokenInterface $token, mixed $subject, array $attributes): int
{
return $this->doVote($token, $subject, $attributes);
}
}
}
/**
* This voter can be used as a base class for implementing your own permissions.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class AclVoter implements VoterInterface
{
use AclVoterTrait;
private $aclProvider;
private $permissionMap;
private $objectIdentityRetrievalStrategy;
private $securityIdentityRetrievalStrategy;
private $allowIfObjectIdentityUnavailable;
private $logger;
public function __construct(AclProviderInterface $aclProvider, ObjectIdentityRetrievalStrategyInterface $oidRetrievalStrategy, SecurityIdentityRetrievalStrategyInterface $sidRetrievalStrategy, PermissionMapInterface $permissionMap, LoggerInterface $logger = null, $allowIfObjectIdentityUnavailable = true)
{
$this->aclProvider = $aclProvider;
$this->permissionMap = $permissionMap;
$this->objectIdentityRetrievalStrategy = $oidRetrievalStrategy;
$this->securityIdentityRetrievalStrategy = $sidRetrievalStrategy;
$this->logger = $logger;
$this->allowIfObjectIdentityUnavailable = $allowIfObjectIdentityUnavailable;
}
public function supportsAttribute($attribute)
{
return \is_string($attribute) && $this->permissionMap->contains($attribute);
}
private function doVote(TokenInterface $token, $subject, array $attributes): int
{
foreach ($attributes as $attribute) {
if (!$this->supportsAttribute($attribute)) {
continue;
}
if (null === $masks = $this->permissionMap->getMasks($attribute, $subject)) {
continue;
}
if (null === $subject) {
if (null !== $this->logger) {
$this->logger->debug(sprintf('Object identity unavailable. Voting to %s.', $this->allowIfObjectIdentityUnavailable ? 'grant access' : 'abstain'));
}
return $this->allowIfObjectIdentityUnavailable ? self::ACCESS_GRANTED : self::ACCESS_ABSTAIN;
} elseif ($subject instanceof FieldVote) {
$field = $subject->getField();
$subject = $subject->getDomainObject();
} else {
$field = null;
}
if ($subject instanceof ObjectIdentityInterface) {
$oid = $subject;
} elseif (null === $oid = $this->objectIdentityRetrievalStrategy->getObjectIdentity($subject)) {
if (null !== $this->logger) {
$this->logger->debug(sprintf('Object identity unavailable. Voting to %s.', $this->allowIfObjectIdentityUnavailable ? 'grant access' : 'abstain'));
}
return $this->allowIfObjectIdentityUnavailable ? self::ACCESS_GRANTED : self::ACCESS_ABSTAIN;
}
if (!$this->supportsClass($oid->getType())) {
return self::ACCESS_ABSTAIN;
}
$sids = $this->securityIdentityRetrievalStrategy->getSecurityIdentities($token);
try {
$acl = $this->aclProvider->findAcl($oid, $sids);
if (null === $field && $acl->isGranted($masks, $sids, false)) {
if (null !== $this->logger) {
$this->logger->debug('ACL found, permission granted. Voting to grant access.');
}
return self::ACCESS_GRANTED;
} elseif (null !== $field && $acl->isFieldGranted($field, $masks, $sids, false)) {
if (null !== $this->logger) {
$this->logger->debug('ACL found, permission granted. Voting to grant access.');
}
return self::ACCESS_GRANTED;
}
if (null !== $this->logger) {
$this->logger->debug('ACL found, insufficient permissions. Voting to deny access.');
}
return self::ACCESS_DENIED;
} catch (AclNotFoundException $e) {
if (null !== $this->logger) {
$this->logger->debug('No ACL found for the object identity. Voting to deny access.');
}
return self::ACCESS_DENIED;
} catch (NoAceFoundException $e) {
if (null !== $this->logger) {
$this->logger->debug('ACL found, no ACE applicable. Voting to deny access.');
}
return self::ACCESS_DENIED;
}
}
// no attribute was supported
return self::ACCESS_ABSTAIN;
}
/**
* You can override this method when writing a voter for a specific domain
* class.
*
* @param string $class The class name
*
* @return bool
*/
public function supportsClass($class)
{
return true;
}
}
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