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✏️ Editing: SandboxExtension.php

<?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 ElementorDeps\Twig\Extension;

use ElementorDeps\Twig\NodeVisitor\SandboxNodeVisitor;
use ElementorDeps\Twig\Sandbox\SecurityNotAllowedMethodError;
use ElementorDeps\Twig\Sandbox\SecurityNotAllowedPropertyError;
use ElementorDeps\Twig\Sandbox\SecurityPolicyInterface;
use ElementorDeps\Twig\Sandbox\SourcePolicyInterface;
use ElementorDeps\Twig\Source;
use ElementorDeps\Twig\TokenParser\SandboxTokenParser;
final class SandboxExtension extends AbstractExtension
{
    private $sandboxedGlobally;
    private $sandboxed;
    private $policy;
    private $sourcePolicy;
    public function __construct(SecurityPolicyInterface $policy, $sandboxed = \false, ?SourcePolicyInterface $sourcePolicy = null)
    {
        $this->policy = $policy;
        $this->sandboxedGlobally = $sandboxed;
        $this->sourcePolicy = $sourcePolicy;
    }
    public function getTokenParsers() : array
    {
        return [new SandboxTokenParser()];
    }
    public function getNodeVisitors() : array
    {
        return [new SandboxNodeVisitor()];
    }
    public function enableSandbox() : void
    {
        $this->sandboxed = \true;
    }
    public function disableSandbox() : void
    {
        $this->sandboxed = \false;
    }
    public function isSandboxed(?Source $source = null) : bool
    {
        return $this->sandboxedGlobally || $this->sandboxed || $this->isSourceSandboxed($source);
    }
    public function isSandboxedGlobally() : bool
    {
        return $this->sandboxedGlobally;
    }
    private function isSourceSandboxed(?Source $source) : bool
    {
        if (null === $source || null === $this->sourcePolicy) {
            return \false;
        }
        return $this->sourcePolicy->enableSandbox($source);
    }
    public function setSecurityPolicy(SecurityPolicyInterface $policy)
    {
        $this->policy = $policy;
    }
    public function getSecurityPolicy() : SecurityPolicyInterface
    {
        return $this->policy;
    }
    public function checkSecurity($tags, $filters, $functions, ?Source $source = null) : void
    {
        if ($this->isSandboxed($source)) {
            $this->policy->checkSecurity($tags, $filters, $functions);
        }
    }
    public function checkMethodAllowed($obj, $method, int $lineno = -1, ?Source $source = null) : void
    {
        if ($this->isSandboxed($source)) {
            try {
                $this->policy->checkMethodAllowed($obj, $method);
            } catch (SecurityNotAllowedMethodError $e) {
                $e->setSourceContext($source);
                $e->setTemplateLine($lineno);
                throw $e;
            }
        }
    }
    public function checkPropertyAllowed($obj, $property, int $lineno = -1, ?Source $source = null) : void
    {
        if ($this->isSandboxed($source)) {
            try {
                $this->policy->checkPropertyAllowed($obj, $property);
            } catch (SecurityNotAllowedPropertyError $e) {
                $e->setSourceContext($source);
                $e->setTemplateLine($lineno);
                throw $e;
            }
        }
    }
    public function ensureToStringAllowed($obj, int $lineno = -1, ?Source $source = null)
    {
        if (\is_array($obj)) {
            $this->ensureToStringAllowedForArray($obj, $lineno, $source);
            return $obj;
        }
        if ($this->isSandboxed($source) && \is_object($obj) && \method_exists($obj, '__toString')) {
            try {
                $this->policy->checkMethodAllowed($obj, '__toString');
            } catch (SecurityNotAllowedMethodError $e) {
                $e->setSourceContext($source);
                $e->setTemplateLine($lineno);
                throw $e;
            }
        }
        return $obj;
    }
    private function ensureToStringAllowedForArray(array $obj, int $lineno, ?Source $source, array &$stack = []) : void
    {
        foreach ($obj as $k => $v) {
            if (!$v) {
                continue;
            }
            if (!\is_array($v)) {
                $this->ensureToStringAllowed($v, $lineno, $source);
                continue;
            }
            if (\PHP_VERSION_ID < 70400) {
                static $cookie;
                if ($v === $cookie ?? ($cookie = new \stdClass())) {
                    continue;
                }
                $obj[$k] = $cookie;
                try {
                    $this->ensureToStringAllowedForArray($v, $lineno, $source, $stack);
                } finally {
                    $obj[$k] = $v;
                }
                continue;
            }
            if ($r = \ReflectionReference::fromArrayElement($obj, $k)) {
                if (isset($stack[$r->getId()])) {
                    continue;
                }
                $stack[$r->getId()] = \true;
            }
            $this->ensureToStringAllowedForArray($v, $lineno, $source, $stack);
        }
    }
}