mirror of
https://github.com/ezyang/htmlpurifier.git
synced 2024-11-08 14:58:42 +00:00
8167fca493
git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@216 48356398-32a2-884e-a903-53898d9a118a
77 lines
2.8 KiB
PHP
77 lines
2.8 KiB
PHP
<?php
|
|
|
|
HTMLPurifier_ConfigDef::define(
|
|
'URI', 'AllowedSchemes', array(
|
|
'http' => true, // "Hypertext Transfer Protocol", nuf' said
|
|
'https' => true, // HTTP over SSL (Secure Socket Layer)
|
|
// quite useful, but not necessary
|
|
'mailto' => true,// Email
|
|
'ftp' => true, // "File Transfer Protocol"
|
|
'irc' => true, // "Internet Relay Chat", usually needs another app
|
|
// for Usenet, these two are similar, but distinct
|
|
'nntp' => true, // individual Netnews articles
|
|
'news' => true // newsgroup or individual Netnews articles),
|
|
),
|
|
'Whitelist that defines the schemes that a URI is allowed to have. This '.
|
|
'prevents XSS attacks from using pseudo-schemes like javascript or mocha.'
|
|
);
|
|
|
|
HTMLPurifier_ConfigDef::define(
|
|
'URI', 'OverrideAllowedSchemes', true,
|
|
'If this is set to true (which it is by default), you can override '.
|
|
'%URI.AllowedSchemes by simply registering a HTMLPurifier_URIScheme '.
|
|
'to the registry. If false, you will also have to update that directive '.
|
|
'in order to add more schemes.'
|
|
);
|
|
|
|
class HTMLPurifier_URISchemeRegistry
|
|
{
|
|
|
|
// pass a registry object $prototype with a compatible interface and
|
|
// the function will copy it and return it all further times.
|
|
// pass bool true to reset to the default registry
|
|
function &instance($prototype = null) {
|
|
static $instance = null;
|
|
if ($prototype !== null) {
|
|
$instance = $prototype;
|
|
} elseif ($instance === null || $prototype == true) {
|
|
$instance = new HTMLPurifier_URISchemeRegistry();
|
|
}
|
|
return $instance;
|
|
}
|
|
|
|
var $schemes = array();
|
|
var $_scheme_dir = null;
|
|
|
|
function &getScheme($scheme, $config = null) {
|
|
if (!$config) $config = HTMLPurifier_Config::createDefault();
|
|
$null = null; // for the sake of passing by reference
|
|
|
|
// important, otherwise attacker could include arbitrary file
|
|
$allowed_schemes = $config->get('URI', 'AllowedSchemes');
|
|
if (!$config->get('URI', 'OverrideAllowedSchemes') &&
|
|
!isset($allowed_schemes[$scheme])
|
|
) {
|
|
return $null;
|
|
}
|
|
|
|
if (isset($this->schemes[$scheme])) return $this->schemes[$scheme];
|
|
if (empty($this->_dir)) $this->_dir = dirname(__FILE__) . '/URIScheme/';
|
|
|
|
if (!isset($allowed_schemes[$scheme])) return $null;
|
|
|
|
@include_once $this->_dir . $scheme . '.php';
|
|
$class = 'HTMLPurifier_URIScheme_' . $scheme;
|
|
if (!class_exists($class)) return $null;
|
|
$this->schemes[$scheme] = new $class();
|
|
return $this->schemes[$scheme];
|
|
}
|
|
|
|
function register($scheme, &$scheme_obj) {
|
|
$this->schemes[$scheme] =& $scheme_obj;
|
|
}
|
|
|
|
}
|
|
|
|
?>
|