WebSVN – lars-tiefland.cakephp – /cake/libs/controller/components/acl.php

<?php
/* SVN FILE: $Id: acl.php 7945 2008-12-19 02:16:01Z gwoo $ */
/**
 * 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. (http://www.cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright     Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
 * @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: 7945 $
 * @modifiedby    $LastChangedBy: gwoo $
 * @lastmodified  $Date: 2008-12-18 18:16:01 -0800 (Thu, 18 Dec 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() {
                $name = Inflector::camelize(strtolower(Configure::read('Acl.classname')));
                if (!class_exists($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, $action);
        }
}
/**
 * Access Control List abstract class. Not to be instantiated.
 * Subclasses of this class are used by AclComponent to perform ACL checks in Cake.
 *
 * @package       cake
 * @subpackage    cake.cake.libs.controller.components
 * @abstract
 */
class AclBase extends Object {
/**
 * This class should never be instantiated, just subclassed.
 *
 */
        function __construct() {
                if (strcasecmp(get_class($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 DbAcl extends AclBase {
/**
 * Constructor
 *
 */
        function __construct() {
                parent::__construct();
                if (!class_exists('AclNode')) {
                        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 $component
 * @return void
 * @access public
 */
        function initialize(&$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 = $this->Aco->node($aco);

                if (empty($aroPath) || empty($acoPath)) {
                        trigger_error("DbAcl::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 == null || $acoPath == array()) {
                        trigger_error("DbAcl::check() - Failed ACO node lookup in permissions check.  Node references:\nAro: " . print_r($aro, true) . "\nAco: " . print_r($aco, true), E_USER_WARNING);
                        return false;
                }

                $aroNode = $aroPath[0];
                $acoNode = $acoPath[0];

                if ($action != '*' && !in_array('_' . $action, $permKeys)) {
                        trigger_error(sprintf(__("ACO permissions key %s does not exist in DbAcl::check()", true), $action), E_USER_NOTICE);
                        return false;
                }

                $inherited = array();
                $acoIDs = Set::extract($acoPath, '{n}.' . $this->Aco->alias . '.id');

                $count = count($aroPath);
                for ($i = 0 ; $i < $count; $i++) {
                        $permAlias = $this->Aro->Permission->alias;

                        $perms = $this->Aro->Permission->find('all', array(
                                'conditions' => array(
                                        "{$permAlias}.aro_id" => $aroPath[$i][$this->Aro->alias]['id'],
                                        "{$permAlias}.aco_id" => $acoIDs
                                ),
                                'order' => array($this->Aco->alias . '.lft' => 'desc'),
                                'recursive' => 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 ($perms == false) {
                        trigger_error(__('DbAcl::allow() - Invalid node', true), E_USER_WARNING);
                        return false;
                }
                if (isset($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] = $value;
                                        }
                                }
                        }
                }
                list($save['aro_id'], $save['aco_id']) = array($perms['aro'], $perms['aco']);

                if ($perms['link'] != null && count($perms['link']) > 0) {
                        $save['id'] = $perms['link'][0][$this->Aro->Permission->alias]['id'];
                } else {
                        unset($save['id']);
                        $this->Aro->Permission->id = null;
                }
                return ($this->Aro->Permission->save($save) !== false);
        }
/**
 * 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->find('all', array('conditions' => 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 IniAcl 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;
        }
}
?>
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(root)/cake/libs/controller/components/acl.php – Revision 1
