www.aleph1.co.uk Git - yaffs-website/blob - vendor/twig/twig/lib/Twig/Extension/Sandbox.php

   1 <?php
   2
   3 /*
   4  * This file is part of Twig.
   5  *
   6  * (c) Fabien Potencier
   7  *
   8  * For the full copyright and license information, please view the LICENSE
   9  * file that was distributed with this source code.
  10  */
  11
  12 /**
  13  * @final
  14  */
  15 class Twig_Extension_Sandbox extends Twig_Extension
  16 {
  17     protected $sandboxedGlobally;
  18     protected $sandboxed;
  19     protected $policy;
  20
  21     public function __construct(Twig_Sandbox_SecurityPolicyInterface $policy, $sandboxed = false)
  22     {
  23         $this->policy = $policy;
  24         $this->sandboxedGlobally = $sandboxed;
  25     }
  26
  27     public function getTokenParsers()
  28     {
  29         return array(new Twig_TokenParser_Sandbox());
  30     }
  31
  32     public function getNodeVisitors()
  33     {
  34         return array(new Twig_NodeVisitor_Sandbox());
  35     }
  36
  37     public function enableSandbox()
  38     {
  39         $this->sandboxed = true;
  40     }
  41
  42     public function disableSandbox()
  43     {
  44         $this->sandboxed = false;
  45     }
  46
  47     public function isSandboxed()
  48     {
  49         return $this->sandboxedGlobally || $this->sandboxed;
  50     }
  51
  52     public function isSandboxedGlobally()
  53     {
  54         return $this->sandboxedGlobally;
  55     }
  56
  57     public function setSecurityPolicy(Twig_Sandbox_SecurityPolicyInterface $policy)
  58     {
  59         $this->policy = $policy;
  60     }
  61
  62     public function getSecurityPolicy()
  63     {
  64         return $this->policy;
  65     }
  66
  67     public function checkSecurity($tags, $filters, $functions)
  68     {
  69         if ($this->isSandboxed()) {
  70             $this->policy->checkSecurity($tags, $filters, $functions);
  71         }
  72     }
  73
  74     public function checkMethodAllowed($obj, $method)
  75     {
  76         if ($this->isSandboxed()) {
  77             $this->policy->checkMethodAllowed($obj, $method);
  78         }
  79     }
  80
  81     public function checkPropertyAllowed($obj, $method)
  82     {
  83         if ($this->isSandboxed()) {
  84             $this->policy->checkPropertyAllowed($obj, $method);
  85         }
  86     }
  87
  88     public function ensureToStringAllowed($obj)
  89     {
  90         if ($this->isSandboxed() && is_object($obj)) {
  91             $this->policy->checkMethodAllowed($obj, '__toString');
  92         }
  93
  94         return $obj;
  95     }
  96
  97     public function getName()
  98     {
  99         return 'sandbox';
 100     }
 101 }