229 lines
7.0 KiB
PHP
229 lines
7.0 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* Smarty plugin
|
||
|
|
*
|
||
|
|
* @package Smarty
|
||
|
|
* @subpackage Security
|
||
|
|
* @author Uwe Tews
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This class does contain the security settings
|
||
|
|
*/
|
||
|
|
class Smarty_Security {
|
||
|
|
/**
|
||
|
|
* This determines how Smarty handles "<?php ... ?>" tags in templates.
|
||
|
|
* possible values:
|
||
|
|
* <ul>
|
||
|
|
* <li>Smarty::PHP_PASSTHRU -> echo PHP tags as they are</li>
|
||
|
|
* <li>Smarty::PHP_QUOTE -> escape tags as entities</li>
|
||
|
|
* <li>Smarty::PHP_REMOVE -> remove php tags</li>
|
||
|
|
* <li>Smarty::PHP_ALLOW -> execute php tags</li>
|
||
|
|
* </ul>
|
||
|
|
*
|
||
|
|
* @var integer
|
||
|
|
*/
|
||
|
|
public $php_handling = Smarty::PHP_PASSTHRU;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This is the list of template directories that are considered secure.
|
||
|
|
* $template_dir is in this list implicitly.
|
||
|
|
*
|
||
|
|
* @var array
|
||
|
|
*/
|
||
|
|
public $secure_dir = array();
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This is an array of directories where trusted php scripts reside.
|
||
|
|
* {@link $security} is disabled during their inclusion/execution.
|
||
|
|
*
|
||
|
|
* @var array
|
||
|
|
*/
|
||
|
|
public $trusted_dir = array();
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This is an array of trusted static classes.
|
||
|
|
*
|
||
|
|
* If empty access to all static classes is allowed.
|
||
|
|
* If set to 'none' none is allowed.
|
||
|
|
* @var array
|
||
|
|
*/
|
||
|
|
public $static_classes = array();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This is an array of trusted PHP functions.
|
||
|
|
*
|
||
|
|
* If empty all functions are allowed.
|
||
|
|
* To disable all PHP functions set $php_functions = null.
|
||
|
|
* @var array
|
||
|
|
*/
|
||
|
|
public $php_functions = array('isset', 'empty',
|
||
|
|
'count', 'sizeof','in_array', 'is_array','time','nl2br');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This is an array of trusted PHP modifers.
|
||
|
|
*
|
||
|
|
* If empty all modifiers are allowed.
|
||
|
|
* To disable all modifier set $modifiers = null.
|
||
|
|
* @var array
|
||
|
|
*/
|
||
|
|
public $php_modifiers = array('escape','count');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This is an array of trusted streams.
|
||
|
|
*
|
||
|
|
* If empty all streams are allowed.
|
||
|
|
* To disable all streams set $streams = null.
|
||
|
|
* @var array
|
||
|
|
*/
|
||
|
|
public $streams = array('file');
|
||
|
|
/**
|
||
|
|
* + flag if constants can be accessed from template
|
||
|
|
*/
|
||
|
|
public $allow_constants = true;
|
||
|
|
/**
|
||
|
|
* + flag if super globals can be accessed from template
|
||
|
|
*/
|
||
|
|
public $allow_super_globals = true;
|
||
|
|
/**
|
||
|
|
* + flag if the {php} and {include_php} tag can be executed
|
||
|
|
*/
|
||
|
|
public $allow_php_tag = false;
|
||
|
|
|
||
|
|
public function __construct($smarty)
|
||
|
|
{
|
||
|
|
$this->smarty = $smarty;
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Check if PHP function is trusted.
|
||
|
|
*
|
||
|
|
* @param string $function_name
|
||
|
|
* @param object $compiler compiler object
|
||
|
|
* @return boolean true if function is trusted
|
||
|
|
*/
|
||
|
|
function isTrustedPhpFunction($function_name, $compiler)
|
||
|
|
{
|
||
|
|
if (isset($this->php_functions) && (empty($this->php_functions) || in_array($function_name, $this->php_functions))) {
|
||
|
|
return true;
|
||
|
|
} else {
|
||
|
|
$compiler->trigger_template_error ("PHP function '{$function_name}' not allowed by security setting");
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Check if static class is trusted.
|
||
|
|
*
|
||
|
|
* @param string $class_name
|
||
|
|
* @param object $compiler compiler object
|
||
|
|
* @return boolean true if class is trusted
|
||
|
|
*/
|
||
|
|
function isTrustedStaticClass($class_name, $compiler)
|
||
|
|
{
|
||
|
|
if (isset($this->static_classes) && (empty($this->static_classes) || in_array($class_name, $this->static_classes))) {
|
||
|
|
return true;
|
||
|
|
} else {
|
||
|
|
$compiler->trigger_template_error ("access to static class '{$class_name}' not allowed by security setting");
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Check if modifier is trusted.
|
||
|
|
*
|
||
|
|
* @param string $modifier_name
|
||
|
|
* @param object $compiler compiler object
|
||
|
|
* @return boolean true if modifier is trusted
|
||
|
|
*/
|
||
|
|
function isTrustedModifier($modifier_name, $compiler)
|
||
|
|
{
|
||
|
|
if (isset($this->php_modifiers) && (empty($this->php_modifiers) || in_array($modifier_name, $this->php_modifiers))) {
|
||
|
|
return true;
|
||
|
|
} else {
|
||
|
|
$compiler->trigger_template_error ("modifier '{$modifier_name}' not allowed by security setting");
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Check if stream is trusted.
|
||
|
|
*
|
||
|
|
* @param string $stream_name
|
||
|
|
* @param object $compiler compiler object
|
||
|
|
* @return boolean true if stream is trusted
|
||
|
|
*/
|
||
|
|
function isTrustedStream($stream_name)
|
||
|
|
{
|
||
|
|
if (isset($this->streams) && (empty($this->streams) || in_array($stream_name, $this->streams))) {
|
||
|
|
return true;
|
||
|
|
} else {
|
||
|
|
throw new SmartyException ("stream '{$stream_name}' not allowed by security setting");
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Check if directory of file resource is trusted.
|
||
|
|
*
|
||
|
|
* @param string $filepath
|
||
|
|
* @param object $compiler compiler object
|
||
|
|
* @return boolean true if directory is trusted
|
||
|
|
*/
|
||
|
|
function isTrustedResourceDir($filepath)
|
||
|
|
{
|
||
|
|
$_rp = realpath($filepath);
|
||
|
|
if (isset($this->smarty->template_dir)) {
|
||
|
|
foreach ((array)$this->smarty->template_dir as $curr_dir) {
|
||
|
|
if (($_cd = realpath($curr_dir)) !== false &&
|
||
|
|
strncmp($_rp, $_cd, strlen($_cd)) == 0 &&
|
||
|
|
(strlen($_rp) == strlen($_cd) || substr($_rp, strlen($_cd), 1) == DS)) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!empty($this->smarty->security_policy->secure_dir)) {
|
||
|
|
foreach ((array)$this->smarty->security_policy->secure_dir as $curr_dir) {
|
||
|
|
if (($_cd = realpath($curr_dir)) !== false) {
|
||
|
|
if ($_cd == $_rp) {
|
||
|
|
return true;
|
||
|
|
} elseif (strncmp($_rp, $_cd, strlen($_cd)) == 0 &&
|
||
|
|
(strlen($_rp) == strlen($_cd) || substr($_rp, strlen($_cd), 1) == DS)) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
throw new SmartyException ("directory '{$_rp}' not allowed by security setting");
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Check if directory of file resource is trusted.
|
||
|
|
*
|
||
|
|
* @param string $filepath
|
||
|
|
* @param object $compiler compiler object
|
||
|
|
* @return boolean true if directory is trusted
|
||
|
|
*/
|
||
|
|
function isTrustedPHPDir($filepath)
|
||
|
|
{
|
||
|
|
$_rp = realpath($filepath);
|
||
|
|
if (!empty($this->trusted_dir)) {
|
||
|
|
foreach ((array)$this->trusted_dir as $curr_dir) {
|
||
|
|
if (($_cd = realpath($curr_dir)) !== false) {
|
||
|
|
if ($_cd == $_rp) {
|
||
|
|
return true;
|
||
|
|
} elseif (strncmp($_rp, $_cd, strlen($_cd)) == 0 &&
|
||
|
|
substr($_rp, strlen($_cd), 1) == DS) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
throw new SmartyException ("directory '{$_rp}' not allowed by security setting");
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
?>
|