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<?php
/* SVN FILE: $Id: acl.php 6311 2008-01-02 06:33:52Z phpnut $ */
/**
* Access Control List factory class.
*
* Permissions system.
*
* PHP versions 4 and 5
*
* CakePHP(tm) : Rapid Development Framework <http://www.cakephp.org/>
* Copyright 2005-2008, Cake Software Foundation, Inc.
* 1785 E. Sahara Avenue, Suite 490-204
* Las Vegas, Nevada 89104
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @filesource
* @copyright Copyright 2005-2008, Cake Software Foundation, Inc.
* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
* @package cake
* @subpackage cake.cake.libs.controller.components
* @since CakePHP(tm) v 0.10.0.1076
* @version $Revision: 6311 $
* @modifiedby $LastChangedBy: phpnut $
* @lastmodified $Date: 2008-01-02 00:33:52 -0600 (Wed, 02 Jan 2008) $
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
/**
* Access Control List factory class.
*
* Looks for ACL implementation class in core config, and returns an instance of that class.
*
* @package cake
* @subpackage cake.cake.libs.controller.components
*/
class AclComponent extends Object {
/**
* Instance of an ACL class
*
* @var object
* @access protected
*/
var $_Instance = null;
/**
* Constructor. Will return an instance of the correct ACL class.
*
*/
function __construct() {
$name = Configure::read('Acl.classname');
if (!class_exists($name)) {
if (App::import('Component'. $name)) {
if (strpos($name, '.') !== false) {
list($plugin, $name) = explode('.', $name);
}
$name .= 'Component';
} else {
trigger_error(sprintf(__('Could not find %s.', true), $name), E_USER_WARNING);
}
}
$this->_Instance =& new $name();
$this->_Instance->initialize($this);
}
/**
* Startup is not used
*
* @param object $controller Controller using this component
* @return boolean Proceed with component usage (true), or fail (false)
* @access public
*/
function startup(&$controller) {
return true;
}
/**
* Empty class defintion, to be overridden in subclasses.
*
* @access protected
*/
function _initACL() {
}
/**
* Pass-thru function for ACL check instance.
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $action Action (defaults to *)
* @return boolean Success
* @access public
*/
function check($aro, $aco, $action = "*") {
return $this->_Instance->check($aro, $aco, $action);
}
/**
* Pass-thru function for ACL allow instance.
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $action Action (defaults to *)
* @return boolean Success
* @access public
*/
function allow($aro, $aco, $action = "*") {
return $this->_Instance->allow($aro, $aco, $action);
}
/**
* Pass-thru function for ACL deny instance.
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $action Action (defaults to *)
* @return boolean Success
* @access public
*/
function deny($aro, $aco, $action = "*") {
return $this->_Instance->deny($aro, $aco, $action);
}
/**
* Pass-thru function for ACL inherit instance.
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $action Action (defaults to *)
* @return boolean Success
* @access public
*/
function inherit($aro, $aco, $action = "*") {
return $this->_Instance->inherit($aro, $aco, $action);
}
/**
* Pass-thru function for ACL grant instance.
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $action Action (defaults to *)
* @return boolean Success
* @access public
*/
function grant($aro, $aco, $action = "*") {
return $this->_Instance->grant($aro, $aco, $action);
}
/**
* Pass-thru function for ACL grant instance.
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $action Action (defaults to *)
* @return boolean Success
* @access public
*/
function revoke($aro, $aco, $action = "*") {
return $this->_Instance->revoke($aro, $aco, $action);
}
/**
* Sets the current ARO instance to object from getAro
*
* @param string $id ID of ARO
* @return boolean Success
* @access public
*/
function setAro($id) {
return $this->Aro = $this->_Instance->getAro($id);
}
/**
* Sets the current ACO instance to object from getAco
*
* @param string $id ID of ACO
* @return boolean Success
* @access public
*/
function setAco($id) {
return $this->Aco = $this->_Instance->getAco($id);
}
/**
* Pass-thru function for ACL getAro instance
* that gets an ARO object from the given id or alias
*
* @param string $id ARO id
* @return object ARO
* @access public
*/
function getAro($id) {
return $this->_Instance->getAro($id);
}
/**
* Pass-thru function for ACL getAco instance.
* that gets an ACO object from the given id or alias
*
* @param string $id ACO id
* @return object ACO
* @access public
*/
function getAco($id) {
return $this->_Instance->getAco($id);
}
}
/**
* Access Control List abstract class. Not to be instantiated.
* Subclasses of this class are used by AclComponent to perform ACL checks in Cake.
*
* @package cake
* @subpackage cake.cake.libs.controller.components
* @abstract
*/
class AclBase extends Object {
/**
* This class should never be instantiated, just subclassed.
*
*/
function __construct() {
if (strcasecmp(get_class($this), "AclBase") == 0 || !is_subclass_of($this, "AclBase")) {
trigger_error(__("[acl_base] The AclBase class constructor has been called, or the class was instantiated. This class must remain abstract. Please refer to the Cake docs for ACL configuration.", true), E_USER_ERROR);
return NULL;
}
}
/**
* Empty method to be overridden in subclasses
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $action Action (defaults to *)
* @access public
*/
function check($aro, $aco, $action = "*") {
}
/**
* Empty method to be overridden in subclasses
*
* @param object $component Component
* @access public
*/
function initialize(&$component) {
}
}
/**
* In this file you can extend the AclBase.
*
* @package cake
* @subpackage cake.cake.libs.model
*/
class DB_ACL extends AclBase {
/**
* Constructor
*
*/
function __construct() {
parent::__construct();
uses('model' . DS . 'db_acl');
$this->Aro =& ClassRegistry::init(array('class' => 'Aro', 'alias' => 'Aro'));
$this->Aco =& ClassRegistry::init(array('class' => 'Aco', 'alias' => 'Aco'));
}
/**
* Enter description here...
*
* @param object $component
* @access public
*/
function initialize(&$component) {
$component->Aro = $this->Aro;
$component->Aco = $this->Aco;
}
/**
* Checks if the given $aro has access to action $action in $aco
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $action Action (defaults to *)
* @return boolean Success (true if ARO has access to action in ACO, false otherwise)
* @access public
*/
function check($aro, $aco, $action = "*") {
if ($aro == null || $aco == null) {
return false;
}
$permKeys = $this->_getAcoKeys($this->Aro->Permission->schema());
$aroPath = $this->Aro->node($aro);
$acoPath = new Set($this->Aco->node($aco));
if (empty($aroPath) || empty($acoPath)) {
trigger_error("DB_ACL::check() - Failed ARO/ACO node lookup in permissions check. Node references:\nAro: " . print_r($aro, true) . "\nAco: " . print_r($aco, true), E_USER_WARNING);
return false;
}
if ($acoPath->get() == null || $acoPath->get() == array()) {
trigger_error("DB_ACL::check() - Failed ACO node lookup in permissions check. Node references:\nAro: " . print_r($aro, true) . "\nAco: " . print_r($aco, true), E_USER_WARNING);
return false;
}
$aroNode = $aroPath[0];
$acoNode = $acoPath->get();
$acoNode = $acoNode[0];
if ($action != '*' && !in_array('_' . $action, $permKeys)) {
trigger_error(sprintf(__("ACO permissions key %s does not exist in DB_ACL::check()", true), $action), E_USER_NOTICE);
return false;
}
$inherited = array();
$acoIDs = $acoPath->extract('{n}.' . $this->Aco->alias . '.id');
for ($i = 0 ; $i < count($aroPath); $i++) {
$permAlias = $this->Aro->Permission->alias;
$perms = $this->Aro->Permission->findAll(array(
"{$permAlias}.aro_id" => $aroPath[$i][$this->Aro->alias]['id'],
"{$permAlias}.aco_id" => $acoIDs),
null, array($this->Aco->alias . '.lft' => 'desc'), null, null, 0
);
if (empty($perms)) {
continue;
} else {
$perms = Set::extract($perms, '{n}.' . $this->Aro->Permission->alias);
foreach ($perms as $perm) {
if ($action == '*') {
foreach ($permKeys as $key) {
if (!empty($perm)) {
if ($perm[$key] === -1) {
return false;
} elseif ($perm[$key] == 1) {
$inherited[$key] = 1;
}
}
}
if (count($inherited) === count($permKeys)) {
return true;
}
} else {
switch($perm['_' . $action]) {
case -1:
return false;
case 0:
continue;
break;
case 1:
return true;
break;
}
}
}
}
}
return false;
}
/**
* Allow $aro to have access to action $actions in $aco
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $actions Action (defaults to *)
* @param integer $value Value to indicate access type (1 to give access, -1 to deny, 0 to inherit)
* @return boolean Success
* @access public
*/
function allow($aro, $aco, $actions = "*", $value = 1) {
$perms = $this->getAclLink($aro, $aco);
$permKeys = $this->_getAcoKeys($this->Aro->Permission->schema());
$save = array();
if ($perms == false) {
trigger_error(__('DB_ACL::allow() - Invalid node', true), E_USER_WARNING);
return false;
}
if (isset($perms[0])) {
$save = $perms[0][$this->Aro->Permission->alias];
}
if ($actions == "*") {
$permKeys = $this->_getAcoKeys($this->Aro->Permission->schema());
$save = array_combine($permKeys, array_pad(array(), count($permKeys), $value));
} else {
if (!is_array($actions)) {
$actions = array('_' . $actions);
}
if (is_array($actions)) {
foreach ($actions as $action) {
if ($action{0} != '_') {
$action = '_' . $action;
}
if (in_array($action, $permKeys)) {
$save[$action] = $value;
}
}
}
}
$save['aro_id'] = $perms['aro'];
$save['aco_id'] = $perms['aco'];
if ($perms['link'] != null && count($perms['link']) > 0) {
$save['id'] = $perms['link'][0][$this->Aro->Permission->alias]['id'];
}
$this->Aro->Permission->create($save);
return $this->Aro->Permission->save();
}
/**
* Deny access for $aro to action $action in $aco
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $actions Action (defaults to *)
* @return boolean Success
* @access public
*/
function deny($aro, $aco, $action = "*") {
return $this->allow($aro, $aco, $action, -1);
}
/**
* Let access for $aro to action $action in $aco be inherited
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $actions Action (defaults to *)
* @return boolean Success
* @access public
*/
function inherit($aro, $aco, $action = "*") {
return $this->allow($aro, $aco, $action, 0);
}
/**
* Allow $aro to have access to action $actions in $aco
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $actions Action (defaults to *)
* @return boolean Success
* @see allow()
* @access public
*/
function grant($aro, $aco, $action = "*") {
return $this->allow($aro, $aco, $action);
}
/**
* Deny access for $aro to action $action in $aco
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $actions Action (defaults to *)
* @return boolean Success
* @see deny()
* @access public
*/
function revoke($aro, $aco, $action = "*") {
return $this->deny($aro, $aco, $action);
}
/**
* Get an array of access-control links between the given Aro and Aco
*
* @param string $aro ARO
* @param string $aco ACO
* @return array Indexed array with: 'aro', 'aco' and 'link'
* @access public
*/
function getAclLink($aro, $aco) {
$obj = array();
$obj['Aro'] = $this->Aro->node($aro);
$obj['Aco'] = $this->Aco->node($aco);
if (empty($obj['Aro']) || empty($obj['Aco'])) {
return false;
}
return array(
'aro' => Set::extract($obj, 'Aro.0.'.$this->Aro->alias.'.id'),
'aco' => Set::extract($obj, 'Aco.0.'.$this->Aco->alias.'.id'),
'link' => $this->Aro->Permission->findAll(array(
$this->Aro->Permission->alias . '.aro_id' => Set::extract($obj, 'Aro.0.'.$this->Aro->alias.'.id'),
$this->Aro->Permission->alias . '.aco_id' => Set::extract($obj, 'Aco.0.'.$this->Aco->alias.'.id')
))
);
}
/**
* Get the keys used in an ACO
*
* @param array $keys Permission model info
* @return array ACO keys
* @access protected
*/
function _getAcoKeys($keys) {
$newKeys = array();
$keys = array_keys($keys);
foreach ($keys as $key) {
if (!in_array($key, array('id', 'aro_id', 'aco_id'))) {
$newKeys[] = $key;
}
}
return $newKeys;
}
}
/**
* In this file you can extend the AclBase.
*
* @package cake
* @subpackage cake.cake.libs.model.iniacl
*/
class INI_ACL extends AclBase {
/**
* Array with configuration, parsed from ini file
*
* @var array
* @access public
*/
var $config = null;
/**
* The constructor must be overridden, as AclBase is abstract.
*
*/
function __construct() {
}
/**
* Main ACL check function. Checks to see if the ARO (access request object) has access to the ACO (access control object).
* Looks at the acl.ini.php file for permissions (see instructions in /config/acl.ini.php).
*
* @param string $aro ARO
* @param string $aco ACO
* @param string $aco_action Action
* @return boolean Success
* @access public
*/
function check($aro, $aco, $aco_action = null) {
if ($this->config == null) {
$this->config = $this->readConfigFile(CONFIGS . 'acl.ini.php');
}
$aclConfig = $this->config;
if (isset($aclConfig[$aro]['deny'])) {
$userDenies = $this->arrayTrim(explode(",", $aclConfig[$aro]['deny']));
if (array_search($aco, $userDenies)) {
return false;
}
}
if (isset($aclConfig[$aro]['allow'])) {
$userAllows = $this->arrayTrim(explode(",", $aclConfig[$aro]['allow']));
if (array_search($aco, $userAllows)) {
return true;
}
}
if (isset($aclConfig[$aro]['groups'])) {
$userGroups = $this->arrayTrim(explode(",", $aclConfig[$aro]['groups']));
foreach ($userGroups as $group) {
if (array_key_exists($group, $aclConfig)) {
if (isset($aclConfig[$group]['deny'])) {
$groupDenies=$this->arrayTrim(explode(",", $aclConfig[$group]['deny']));
if (array_search($aco, $groupDenies)) {
return false;
}
}
if (isset($aclConfig[$group]['allow'])) {
$groupAllows = $this->arrayTrim(explode(",", $aclConfig[$group]['allow']));
if (array_search($aco, $groupAllows)) {
return true;
}
}
}
}
}
return false;
}
/**
* Parses an INI file and returns an array that reflects the INI file's section structure. Double-quote friendly.
*
* @param string $fileName File
* @return array INI section structure
* @access public
*/
function readConfigFile($fileName) {
$fileLineArray = file($fileName);
foreach ($fileLineArray as $fileLine) {
$dataLine = trim($fileLine);
$firstChar = substr($dataLine, 0, 1);
if ($firstChar != ';' && $dataLine != '') {
if ($firstChar == '[' && substr($dataLine, -1, 1) == ']') {
$sectionName = preg_replace('/[\[\]]/', '', $dataLine);
} else {
$delimiter = strpos($dataLine, '=');
if ($delimiter > 0) {
$key = strtolower(trim(substr($dataLine, 0, $delimiter)));
$value = trim(substr($dataLine, $delimiter + 1));
if (substr($value, 0, 1) == '"' && substr($value, -1) == '"') {
$value = substr($value, 1, -1);
}
$iniSetting[$sectionName][$key]=stripcslashes($value);
} else {
if (!isset($sectionName)) {
$sectionName = '';
}
$iniSetting[$sectionName][strtolower(trim($dataLine))]='';
}
}
}
}
return $iniSetting;
}
/**
* Removes trailing spaces on all array elements (to prepare for searching)
*
* @param array $array Array to trim
* @return array Trimmed array
* @access public
*/
function arrayTrim($array) {
foreach ($array as $key => $value) {
$array[$key] = trim($value);
}
array_unshift($array, "");
return $array;
}
}
?>