1: <?php
  2: /**
  3:  * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
  4:  * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
  5:  *
  6:  * Licensed under The MIT License
  7:  * For full copyright and license information, please see the LICENSE.txt
  8:  * Redistributions of files must retain the above copyright notice.
  9:  *
 10:  * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 11:  * @link          http://cakephp.org CakePHP(tm) Project
 12:  * @package       Cake.Controller.Component.Acl
 13:  * @since         CakePHP(tm) v 0.10.0.1076
 14:  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 15:  */
 16: 
 17: App::uses('AclInterface', 'Controller/Component/Acl');
 18: 
 19: /**
 20:  * IniAcl implements an access control system using an INI file. An example
 21:  * of the ini file used can be found in /config/acl.ini.php.
 22:  *
 23:  * @package       Cake.Controller.Component.Acl
 24:  */
 25: class IniAcl extends Object implements AclInterface {
 26: 
 27: /**
 28:  * Array with configuration, parsed from ini file
 29:  *
 30:  * @var array
 31:  */
 32:     public $config = null;
 33: 
 34: /**
 35:  * The Hash::extract() path to the user/aro identifier in the
 36:  * acl.ini file. This path will be used to extract the string
 37:  * representation of a user used in the ini file.
 38:  *
 39:  * @var string
 40:  */
 41:     public $userPath = 'User.username';
 42: 
 43: /**
 44:  * Initialize method
 45:  *
 46:  * @param Component $component The AclComponent instance.
 47:  * @return void
 48:  */
 49:     public function initialize(Component $component) {
 50:     }
 51: 
 52: /**
 53:  * No op method, allow cannot be done with IniAcl
 54:  *
 55:  * @param string $aro ARO The requesting object identifier.
 56:  * @param string $aco ACO The controlled object identifier.
 57:  * @param string $action Action (defaults to *)
 58:  * @return bool Success
 59:  */
 60:     public function allow($aro, $aco, $action = "*") {
 61:     }
 62: 
 63: /**
 64:  * No op method, deny cannot be done with IniAcl
 65:  *
 66:  * @param string $aro ARO The requesting object identifier.
 67:  * @param string $aco ACO The controlled object identifier.
 68:  * @param string $action Action (defaults to *)
 69:  * @return bool Success
 70:  */
 71:     public function deny($aro, $aco, $action = "*") {
 72:     }
 73: 
 74: /**
 75:  * No op method, inherit cannot be done with IniAcl
 76:  *
 77:  * @param string $aro ARO The requesting object identifier.
 78:  * @param string $aco ACO The controlled object identifier.
 79:  * @param string $action Action (defaults to *)
 80:  * @return bool Success
 81:  */
 82:     public function inherit($aro, $aco, $action = "*") {
 83:     }
 84: 
 85: /**
 86:  * Main ACL check function. Checks to see if the ARO (access request object) has access to the
 87:  * ACO (access control object).Looks at the acl.ini.php file for permissions
 88:  * (see instructions in /config/acl.ini.php).
 89:  *
 90:  * @param string $aro ARO
 91:  * @param string $aco ACO
 92:  * @param string $action Action
 93:  * @return bool Success
 94:  */
 95:     public function check($aro, $aco, $action = null) {
 96:         if (!$this->config) {
 97:             $this->config = $this->readConfigFile(APP . 'Config' . DS . 'acl.ini.php');
 98:         }
 99:         $aclConfig = $this->config;
100: 
101:         if (is_array($aro)) {
102:             $aro = Hash::get($aro, $this->userPath);
103:         }
104: 
105:         if (isset($aclConfig[$aro]['deny'])) {
106:             $userDenies = $this->arrayTrim(explode(",", $aclConfig[$aro]['deny']));
107: 
108:             if (array_search($aco, $userDenies)) {
109:                 return false;
110:             }
111:         }
112: 
113:         if (isset($aclConfig[$aro]['allow'])) {
114:             $userAllows = $this->arrayTrim(explode(",", $aclConfig[$aro]['allow']));
115: 
116:             if (array_search($aco, $userAllows)) {
117:                 return true;
118:             }
119:         }
120: 
121:         if (isset($aclConfig[$aro]['groups'])) {
122:             $userGroups = $this->arrayTrim(explode(",", $aclConfig[$aro]['groups']));
123: 
124:             foreach ($userGroups as $group) {
125:                 if (array_key_exists($group, $aclConfig)) {
126:                     if (isset($aclConfig[$group]['deny'])) {
127:                         $groupDenies = $this->arrayTrim(explode(",", $aclConfig[$group]['deny']));
128: 
129:                         if (array_search($aco, $groupDenies)) {
130:                             return false;
131:                         }
132:                     }
133: 
134:                     if (isset($aclConfig[$group]['allow'])) {
135:                         $groupAllows = $this->arrayTrim(explode(",", $aclConfig[$group]['allow']));
136: 
137:                         if (array_search($aco, $groupAllows)) {
138:                             return true;
139:                         }
140:                     }
141:                 }
142:             }
143:         }
144:         return false;
145:     }
146: 
147: /**
148:  * Parses an INI file and returns an array that reflects the
149:  * INI file's section structure. Double-quote friendly.
150:  *
151:  * @param string $filename File
152:  * @return array INI section structure
153:  */
154:     public function readConfigFile($filename) {
155:         App::uses('IniReader', 'Configure');
156:         $iniFile = new IniReader(dirname($filename) . DS);
157:         return $iniFile->read(basename($filename));
158:     }
159: 
160: /**
161:  * Removes trailing spaces on all array elements (to prepare for searching)
162:  *
163:  * @param array $array Array to trim
164:  * @return array Trimmed array
165:  */
166:     public function arrayTrim($array) {
167:         foreach ($array as $key => $value) {
168:             $array[$key] = trim($value);
169:         }
170:         array_unshift($array, "");
171:         return $array;
172:     }
173: 
174: }
175: