125 lines
3.9 KiB
PHP
125 lines
3.9 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Adds important param elements to inside of object in order to make
|
|
* things safe.
|
|
*/
|
|
class HTMLPurifier_Injector_SafeObject extends HTMLPurifier_Injector
|
|
{
|
|
/**
|
|
* @type string
|
|
*/
|
|
public $name = 'SafeObject';
|
|
|
|
/**
|
|
* @type array
|
|
*/
|
|
public $needed = array('object', 'param');
|
|
|
|
/**
|
|
* @type array
|
|
*/
|
|
protected $objectStack = array();
|
|
|
|
/**
|
|
* @type array
|
|
*/
|
|
protected $paramStack = array();
|
|
|
|
/**
|
|
* Keep this synchronized with AttrTransform/SafeParam.php.
|
|
* @type array
|
|
*/
|
|
protected $addParam = array(
|
|
'allowScriptAccess' => 'never',
|
|
'allowNetworking' => 'internal',
|
|
);
|
|
|
|
/**
|
|
* These are all lower-case keys.
|
|
* @type array
|
|
*/
|
|
protected $allowedParam = array(
|
|
'wmode' => true,
|
|
'movie' => true,
|
|
'flashvars' => true,
|
|
'src' => true,
|
|
'allowfullscreen' => true, // if omitted, assume to be 'false'
|
|
);
|
|
|
|
/**
|
|
* @param HTMLPurifier_Config $config
|
|
* @param HTMLPurifier_Context $context
|
|
* @return void
|
|
*/
|
|
public function prepare($config, $context)
|
|
{
|
|
parent::prepare($config, $context);
|
|
}
|
|
|
|
/**
|
|
* @param HTMLPurifier_Token $token
|
|
*/
|
|
public function handleElement(&$token)
|
|
{
|
|
if ($token->name == 'object') {
|
|
$this->objectStack[] = $token;
|
|
$this->paramStack[] = array();
|
|
$new = array($token);
|
|
foreach ($this->addParam as $name => $value) {
|
|
$new[] = new HTMLPurifier_Token_Empty('param', array('name' => $name, 'value' => $value));
|
|
}
|
|
$token = $new;
|
|
} elseif ($token->name == 'param') {
|
|
$nest = count($this->currentNesting) - 1;
|
|
if ($nest >= 0 && $this->currentNesting[$nest]->name === 'object') {
|
|
$i = count($this->objectStack) - 1;
|
|
if (!isset($token->attr['name'])) {
|
|
$token = false;
|
|
return;
|
|
}
|
|
$n = $token->attr['name'];
|
|
// We need this fix because YouTube doesn't supply a data
|
|
// attribute, which we need if a type is specified. This is
|
|
// *very* Flash specific.
|
|
if (!isset($this->objectStack[$i]->attr['data']) &&
|
|
($token->attr['name'] == 'movie' || $token->attr['name'] == 'src')
|
|
) {
|
|
$this->objectStack[$i]->attr['data'] = $token->attr['value'];
|
|
}
|
|
// Check if the parameter is the correct value but has not
|
|
// already been added
|
|
if (!isset($this->paramStack[$i][$n]) &&
|
|
isset($this->addParam[$n]) &&
|
|
$token->attr['name'] === $this->addParam[$n]) {
|
|
// keep token, and add to param stack
|
|
$this->paramStack[$i][$n] = true;
|
|
} elseif (isset($this->allowedParam[strtolower($n)])) {
|
|
// keep token, don't do anything to it
|
|
// (could possibly check for duplicates here)
|
|
// Note: In principle, parameters should be case sensitive.
|
|
// But it seems they are not really; so accept any case.
|
|
} else {
|
|
$token = false;
|
|
}
|
|
} else {
|
|
// not directly inside an object, DENY!
|
|
$token = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
public function handleEnd(&$token)
|
|
{
|
|
// This is the WRONG way of handling the object and param stacks;
|
|
// we should be inserting them directly on the relevant object tokens
|
|
// so that the global stack handling handles it.
|
|
if ($token->name == 'object') {
|
|
array_pop($this->objectStack);
|
|
array_pop($this->paramStack);
|
|
}
|
|
}
|
|
}
|
|
|
|
// vim: et sw=4 sts=4
|