diff options
Diffstat (limited to 'lib/smarty/libs/sysplugins/smarty_security.php')
| -rw-r--r-- | lib/smarty/libs/sysplugins/smarty_security.php | 459 |
1 files changed, 0 insertions, 459 deletions
diff --git a/lib/smarty/libs/sysplugins/smarty_security.php b/lib/smarty/libs/sysplugins/smarty_security.php deleted file mode 100644 index f8b31d963..000000000 --- a/lib/smarty/libs/sysplugins/smarty_security.php +++ /dev/null @@ -1,459 +0,0 @@ -<?php -/** - * Smarty plugin - * - * @package Smarty - * @subpackage Security - * @author Uwe Tews - */ - -/* - * FIXME: Smarty_Security API - * - getter and setter instead of public properties would allow cultivating an internal cache properly - * - current implementation of isTrustedResourceDir() assumes that Smarty::$template_dir and Smarty::$config_dir are immutable - * the cache is killed every time either of the variables change. That means that two distinct Smarty objects with differing - * $template_dir or $config_dir should NOT share the same Smarty_Security instance, - * as this would lead to (severe) performance penalty! how should this be handled? - */ - -/** - * 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(); - /** - * List of regular expressions (PCRE) that include trusted URIs - * - * @var array - */ - public $trusted_uri = 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 allowed tags. - * - * If empty no restriction by allowed_tags. - * @var array - */ - public $allowed_tags = array(); - /** - * This is an array of disabled tags. - * - * If empty no restriction by disabled_tags. - * @var array - */ - public $disabled_tags = array(); - /** - * This is an array of allowed modifier plugins. - * - * If empty no restriction by allowed_modifiers. - * @var array - */ - public $allowed_modifiers = array(); - /** - * This is an array of disabled modifier plugins. - * - * If empty no restriction by disabled_modifiers. - * @var array - */ - public $disabled_modifiers = array(); - /** - * 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 - * @var boolean - */ - public $allow_constants = true; - /** - * + flag if super globals can be accessed from template - * @var boolean - */ - public $allow_super_globals = true; - - /** - * Cache for $resource_dir lookups - * @var array - */ - protected $_resource_dir = null; - /** - * Cache for $template_dir lookups - * @var array - */ - protected $_template_dir = null; - /** - * Cache for $config_dir lookups - * @var array - */ - protected $_config_dir = null; - /** - * Cache for $secure_dir lookups - * @var array - */ - protected $_secure_dir = null; - /** - * Cache for $php_resource_dir lookups - * @var array - */ - protected $_php_resource_dir = null; - /** - * Cache for $trusted_dir lookups - * @var array - */ - protected $_trusted_dir = null; - - - /** - * @param Smarty $smarty - */ - public function __construct($smarty) - { - $this->smarty = $smarty; - } - - /** - * Check if PHP function is trusted. - * - * @param string $function_name - * @param object $compiler compiler object - * @return boolean true if function is trusted - * @throws SmartyCompilerException if php function is not trusted - */ - public function isTrustedPhpFunction($function_name, $compiler) - { - if (isset($this->php_functions) && (empty($this->php_functions) || in_array($function_name, $this->php_functions))) { - return true; - } - - $compiler->trigger_template_error("PHP function '{$function_name}' not allowed by security setting"); - return false; // should not, but who knows what happens to the compiler in the future? - } - - /** - * Check if static class is trusted. - * - * @param string $class_name - * @param object $compiler compiler object - * @return boolean true if class is trusted - * @throws SmartyCompilerException if static class is not trusted - */ - public function isTrustedStaticClass($class_name, $compiler) - { - if (isset($this->static_classes) && (empty($this->static_classes) || in_array($class_name, $this->static_classes))) { - return true; - } - - $compiler->trigger_template_error("access to static class '{$class_name}' not allowed by security setting"); - return false; // should not, but who knows what happens to the compiler in the future? - } - - /** - * Check if PHP modifier is trusted. - * - * @param string $modifier_name - * @param object $compiler compiler object - * @return boolean true if modifier is trusted - * @throws SmartyCompilerException if modifier is not trusted - */ - public function isTrustedPhpModifier($modifier_name, $compiler) - { - if (isset($this->php_modifiers) && (empty($this->php_modifiers) || in_array($modifier_name, $this->php_modifiers))) { - return true; - } - - $compiler->trigger_template_error("modifier '{$modifier_name}' not allowed by security setting"); - return false; // should not, but who knows what happens to the compiler in the future? - } - - /** - * Check if tag is trusted. - * - * @param string $tag_name - * @param object $compiler compiler object - * @return boolean true if tag is trusted - * @throws SmartyCompilerException if modifier is not trusted - */ - public function isTrustedTag($tag_name, $compiler) - { - // check for internal always required tags - if (in_array($tag_name, array('assign', 'call', 'private_filter', 'private_block_plugin', 'private_function_plugin', 'private_object_block_function', - 'private_object_function', 'private_registered_function', 'private_registered_block', 'private_special_variable', 'private_print_expression', 'private_modifier'))) { - return true; - } - // check security settings - if (empty($this->allowed_tags)) { - if (empty($this->disabled_tags) || !in_array($tag_name, $this->disabled_tags)) { - return true; - } else { - $compiler->trigger_template_error("tag '{$tag_name}' disabled by security setting", $compiler->lex->taglineno); - } - } else if (in_array($tag_name, $this->allowed_tags) && !in_array($tag_name, $this->disabled_tags)) { - return true; - } else { - $compiler->trigger_template_error("tag '{$tag_name}' not allowed by security setting", $compiler->lex->taglineno); - } - return false; // should not, but who knows what happens to the compiler in the future? - } - - /** - * Check if modifier plugin is trusted. - * - * @param string $modifier_name - * @param object $compiler compiler object - * @return boolean true if tag is trusted - * @throws SmartyCompilerException if modifier is not trusted - */ - public function isTrustedModifier($modifier_name, $compiler) - { - // check for internal always allowed modifier - if (in_array($modifier_name, array('default'))) { - return true; - } - // check security settings - if (empty($this->allowed_modifiers)) { - if (empty($this->disabled_modifiers) || !in_array($modifier_name, $this->disabled_modifiers)) { - return true; - } else { - $compiler->trigger_template_error("modifier '{$modifier_name}' disabled by security setting", $compiler->lex->taglineno); - } - } else if (in_array($modifier_name, $this->allowed_modifiers) && !in_array($modifier_name, $this->disabled_modifiers)) { - return true; - } else { - $compiler->trigger_template_error("modifier '{$modifier_name}' not allowed by security setting", $compiler->lex->taglineno); - } - return false; // should not, but who knows what happens to the compiler in the future? - } - - /** - * Check if stream is trusted. - * - * @param string $stream_name - * @return boolean true if stream is trusted - * @throws SmartyException if stream is not trusted - */ - public function isTrustedStream($stream_name) - { - if (isset($this->streams) && (empty($this->streams) || in_array($stream_name, $this->streams))) { - return true; - } - - throw new SmartyException("stream '{$stream_name}' not allowed by security setting"); - } - - /** - * Check if directory of file resource is trusted. - * - * @param string $filepath - * @return boolean true if directory is trusted - * @throws SmartyException if directory is not trusted - */ - public function isTrustedResourceDir($filepath) - { - $_template = false; - $_config = false; - $_secure = false; - - $_template_dir = $this->smarty->getTemplateDir(); - $_config_dir = $this->smarty->getConfigDir(); - - // check if index is outdated - if ((!$this->_template_dir || $this->_template_dir !== $_template_dir) - || (!$this->_config_dir || $this->_config_dir !== $_config_dir) - || (!empty($this->secure_dir) && (!$this->_secure_dir || $this->_secure_dir !== $this->secure_dir)) - ) { - $this->_resource_dir = array(); - $_template = true; - $_config = true; - $_secure = !empty($this->secure_dir); - } - - // rebuild template dir index - if ($_template) { - $this->_template_dir = $_template_dir; - foreach ($_template_dir as $directory) { - $directory = realpath($directory); - $this->_resource_dir[$directory] = true; - } - } - - // rebuild config dir index - if ($_config) { - $this->_config_dir = $_config_dir; - foreach ($_config_dir as $directory) { - $directory = realpath($directory); - $this->_resource_dir[$directory] = true; - } - } - - // rebuild secure dir index - if ($_secure) { - $this->_secure_dir = $this->secure_dir; - foreach ((array) $this->secure_dir as $directory) { - $directory = realpath($directory); - $this->_resource_dir[$directory] = true; - } - } - - $_filepath = realpath($filepath); - $directory = dirname($_filepath); - $_directory = array(); - while (true) { - // remember the directory to add it to _resource_dir in case we're successful - $_directory[$directory] = true; - // test if the directory is trusted - if (isset($this->_resource_dir[$directory])) { - // merge sub directories of current $directory into _resource_dir to speed up subsequent lookups - $this->_resource_dir = array_merge($this->_resource_dir, $_directory); - return true; - } - // abort if we've reached root - if (($pos = strrpos($directory, DS)) === false || !isset($directory[1])) { - break; - } - // bubble up one level - $directory = substr($directory, 0, $pos); - } - - // give up - throw new SmartyException("directory '{$_filepath}' not allowed by security setting"); - } - - /** - * Check if URI (e.g. {fetch} or {html_image}) is trusted - * - * To simplify things, isTrustedUri() resolves all input to "{$PROTOCOL}://{$HOSTNAME}". - * So "http://username:password@hello.world.example.org:8080/some-path?some=query-string" - * is reduced to "http://hello.world.example.org" prior to applying the patters from {@link $trusted_uri}. - * @param string $uri - * @return boolean true if URI is trusted - * @throws SmartyException if URI is not trusted - * @uses $trusted_uri for list of patterns to match against $uri - */ - public function isTrustedUri($uri) - { - $_uri = parse_url($uri); - if (!empty($_uri['scheme']) && !empty($_uri['host'])) { - $_uri = $_uri['scheme'] . '://' . $_uri['host']; - foreach ($this->trusted_uri as $pattern) { - if (preg_match($pattern, $_uri)) { - return true; - } - } - } - - throw new SmartyException("URI '{$uri}' not allowed by security setting"); - } - - /** - * Check if directory of file resource is trusted. - * - * @param string $filepath - * @return boolean true if directory is trusted - * @throws SmartyException if PHP directory is not trusted - */ - public function isTrustedPHPDir($filepath) - { - if (empty($this->trusted_dir)) { - throw new SmartyException("directory '{$filepath}' not allowed by security setting (no trusted_dir specified)"); - } - - // check if index is outdated - if (!$this->_trusted_dir || $this->_trusted_dir !== $this->trusted_dir) { - $this->_php_resource_dir = array(); - - $this->_trusted_dir = $this->trusted_dir; - foreach ((array) $this->trusted_dir as $directory) { - $directory = realpath($directory); - $this->_php_resource_dir[$directory] = true; - } - } - - $_filepath = realpath($filepath); - $directory = dirname($_filepath); - $_directory = array(); - while (true) { - // remember the directory to add it to _resource_dir in case we're successful - $_directory[] = $directory; - // test if the directory is trusted - if (isset($this->_php_resource_dir[$directory])) { - // merge sub directories of current $directory into _resource_dir to speed up subsequent lookups - $this->_php_resource_dir = array_merge($this->_php_resource_dir, $_directory); - return true; - } - // abort if we've reached root - if (($pos = strrpos($directory, DS)) === false || !isset($directory[2])) { - break; - } - // bubble up one level - $directory = substr($directory, 0, $pos); - } - - throw new SmartyException("directory '{$_filepath}' not allowed by security setting"); - } - -} - -?>
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