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smarty_internal_security_handler.php
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smarty_internal_security_handler.php
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<?php
/**
* Smarty Internal Plugin Security Handler
*
* @package Smarty
* @subpackage Security
* @author Uwe Tews
*/
/**
* This class contains all methods for security checking
*/
class Smarty_Internal_Security_Handler {
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, $compiler)
{
if (empty($this->smarty->security_policy->php_functions) || in_array($function_name, $this->smarty->security_policy->php_functions)) {
return true;
} else {
$compiler->trigger_template_error ("PHP function \"" . $function_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, $compiler)
{
if (empty($this->smarty->security_policy->modifiers) || in_array($modifier_name, $this->smarty->security_policy->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 (empty($this->smarty->security_policy->streams) || in_array($stream_name, $this->smarty->security_policy->streams)) {
return true;
} else {
throw new Exception ("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 Exception ("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($this->smarty->security_policy->trusted_dir)) {
foreach ((array)$this->smarty->security_policy->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 Exception ("directory \"" . $_rp . "\" not allowed by security setting");
return false;
}
}
?>

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