Файл: upload/core/vendor/twig/twig/src/Sandbox/SecurityPolicy.php
Строк: 128
<?php
/*
* This file is part of Twig.
*
* (c) Fabien Potencier
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace TwigSandbox;
use TwigMarkup;
use TwigTemplate;
/**
* Represents a security policy which need to be enforced when sandbox mode is enabled.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
final class SecurityPolicy implements SecurityPolicyInterface
{
private $allowedTags;
private $allowedFilters;
private $allowedMethods;
private $allowedProperties;
private $allowedFunctions;
public function __construct(array $allowedTags = [], array $allowedFilters = [], array $allowedMethods = [], array $allowedProperties = [], array $allowedFunctions = [])
{
$this->allowedTags = $allowedTags;
$this->allowedFilters = $allowedFilters;
$this->setAllowedMethods($allowedMethods);
$this->allowedProperties = $allowedProperties;
$this->allowedFunctions = $allowedFunctions;
}
public function setAllowedTags(array $tags): void
{
$this->allowedTags = $tags;
}
public function setAllowedFilters(array $filters): void
{
$this->allowedFilters = $filters;
}
public function setAllowedMethods(array $methods): void
{
$this->allowedMethods = [];
foreach ($methods as $class => $m) {
$this->allowedMethods[$class] = array_map('strtolower', is_array($m) ? $m : [$m]);
}
}
public function setAllowedProperties(array $properties): void
{
$this->allowedProperties = $properties;
}
public function setAllowedFunctions(array $functions): void
{
$this->allowedFunctions = $functions;
}
public function checkSecurity($tags, $filters, $functions): void
{
foreach ($tags as $tag) {
if (!in_array($tag, $this->allowedTags, true)) {
if ('extends' === $tag) {
trigger_deprecation('twig/twig', '3.12', 'The "extends" tag is always allowed in sandboxes, but won't be in 4.0, please enable it explicitly in your sandbox policy if needed.');
} elseif ('use' === $tag) {
trigger_deprecation('twig/twig', '3.12', 'The "use" tag is always allowed in sandboxes, but won't be in 4.0, please enable it explicitly in your sandbox policy if needed.');
} else {
throw new SecurityNotAllowedTagError(sprintf('Tag "%s" is not allowed.', $tag), $tag);
}
}
}
foreach ($filters as $filter) {
if (!in_array($filter, $this->allowedFilters, true)) {
throw new SecurityNotAllowedFilterError(sprintf('Filter "%s" is not allowed.', $filter), $filter);
}
}
foreach ($functions as $function) {
if (!in_array($function, $this->allowedFunctions, true)) {
throw new SecurityNotAllowedFunctionError(sprintf('Function "%s" is not allowed.', $function), $function);
}
}
}
public function checkMethodAllowed($obj, $method): void
{
if ($obj instanceof Template || $obj instanceof Markup) {
return;
}
$allowed = false;
$method = strtolower($method);
foreach ($this->allowedMethods as $class => $methods) {
if ($obj instanceof $class && in_array($method, $methods, true)) {
$allowed = true;
break;
}
}
if (!$allowed) {
$class = $obj::class;
throw new SecurityNotAllowedMethodError(sprintf('Calling "%s" method on a "%s" object is not allowed.', $method, $class), $class, $method);
}
}
public function checkPropertyAllowed($obj, $property): void
{
$allowed = false;
foreach ($this->allowedProperties as $class => $properties) {
if ($obj instanceof $class && in_array($property, is_array($properties) ? $properties : [$properties], true)) {
$allowed = true;
break;
}
}
if (!$allowed) {
$class = $obj::class;
throw new SecurityNotAllowedPropertyError(sprintf('Calling "%s" property on a "%s" object is not allowed.', $property, $class), $class, $property);
}
}
}