Part-DB.Part-DB-server/src/Twig/Sandbox/InheritanceSecurityPolicy.php

<?php

declare(strict_types=1);

/*
 * 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 App\Twig\Sandbox;

use Twig\Markup;
use Twig\Sandbox\SecurityNotAllowedFilterError;
use Twig\Sandbox\SecurityNotAllowedFunctionError;
use Twig\Sandbox\SecurityNotAllowedMethodError;
use Twig\Sandbox\SecurityNotAllowedPropertyError;
use Twig\Sandbox\SecurityNotAllowedTagError;
use Twig\Sandbox\SecurityPolicyInterface;
use Twig\Template;

use function get_class;
use function in_array;
use function is_array;

/**
 * Represents a security policy which need to be enforced when sandbox mode is enabled.
 *
 * Modified by Jan Böhmer, to allow inheritance of methods and properties via class hierachy.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
final class InheritanceSecurityPolicy implements SecurityPolicyInterface
{
    private array $allowedTags;
    private array $allowedFilters;
    private array $allowedMethods;
    private array $allowedProperties;
    private array $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(
                static function ($value) { return strtr($value, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'); }, 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)) {
                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;
        $method = strtr($method, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz');
        foreach ($this->allowedMethods as $class => $methods) {
            if ($obj instanceof $class) {
                $allowed = in_array($method, $methods, true);

                //CHANGED: Only break if the method is allowed, otherwise try it on the other methods
                if ($allowed) {
                    break;
                }
            }
        }

        if (!$allowed) {
            $class = get_class($obj);

            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) {
                $allowed = in_array($property, is_array($properties) ? $properties : [$properties], true);

                //CHANGED: Only break if the method is allowed, otherwise try it on the other methods
                if ($allowed) {
                    break;
                }
            }
        }

        if (!$allowed) {
            $class = get_class($obj);

            throw new SecurityNotAllowedPropertyError(sprintf('Calling "%s" property on a "%s" object is not allowed.', $property, $class), $class, $property);
        }
    }
}