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<?php
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/*
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* This file is part of Twig.
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*
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* (c) 2009 Fabien Potencier
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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class Twig_Extension_Sandbox extends Twig_Extension
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{
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protected $sandboxedGlobally;
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protected $sandboxed;
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protected $policy;
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public function __construct(Twig_Sandbox_SecurityPolicyInterface $policy, $sandboxed = false)
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{
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$this->policy = $policy;
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$this->sandboxedGlobally = $sandboxed;
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}
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/**
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* Returns the token parser instances to add to the existing list.
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*
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* @return array An array of Twig_TokenParserInterface or Twig_TokenParserBrokerInterface instances
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*/
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public function getTokenParsers()
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{
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return array(new Twig_TokenParser_Sandbox());
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}
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/**
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* Returns the node visitor instances to add to the existing list.
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*
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* @return array An array of Twig_NodeVisitorInterface instances
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*/
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public function getNodeVisitors()
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{
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return array(new Twig_NodeVisitor_Sandbox());
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}
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public function enableSandbox()
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{
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$this->sandboxed = true;
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}
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public function disableSandbox()
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{
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$this->sandboxed = false;
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}
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public function isSandboxed()
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{
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return $this->sandboxedGlobally || $this->sandboxed;
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}
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public function isSandboxedGlobally()
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{
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return $this->sandboxedGlobally;
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}
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public function setSecurityPolicy(Twig_Sandbox_SecurityPolicyInterface $policy)
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{
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$this->policy = $policy;
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}
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public function getSecurityPolicy()
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{
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return $this->policy;
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}
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public function checkSecurity($tags, $filters, $functions)
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{
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if ($this->isSandboxed()) {
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$this->policy->checkSecurity($tags, $filters, $functions);
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}
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}
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public function checkMethodAllowed($obj, $method)
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{
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if ($this->isSandboxed()) {
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$this->policy->checkMethodAllowed($obj, $method);
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}
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}
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public function checkPropertyAllowed($obj, $method)
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{
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if ($this->isSandboxed()) {
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$this->policy->checkPropertyAllowed($obj, $method);
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}
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}
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public function ensureToStringAllowed($obj)
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{
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if (is_object($obj)) {
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$this->policy->checkMethodAllowed($obj, '__toString');
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}
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return $obj;
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}
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/**
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* Returns the name of the extension.
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*
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* @return string The extension name
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*/
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public function getName()
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{
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return 'sandbox';
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}
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}
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