forked from extern/egroupware
806 lines
23 KiB
PHP
806 lines
23 KiB
PHP
<?php
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/**
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* EGroupware API - ACL
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*
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* @link http://www.egroupware.org
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* @author Dan Kuykendall <seek3r@phpgroupware.org>
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* Copyright (C) 2000, 2001 Dan Kuykendall
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* @license http://opensource.org/licenses/lgpl-license.php LGPL - GNU Lesser General Public License
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* @package api
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* @subpackage acl
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* @version $Id$
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*/
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namespace EGroupware\Api;
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/**
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* Access Control List System
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*
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* This class provides an ACL security scheme.
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* This can manage rights to 'run' applications, and limit certain features within an application.
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* It is also used for granting a user "membership" to a group, or making a user have the security equivilance of another user.
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* It is also used for granting a user or group rights to various records, such as todo or calendar items of another user.
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*
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* $acl = new acl(5); // 5 is the user id
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*/
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class Acl
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{
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/**
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* @var int $account_id the account-id this class is instanciated for
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*/
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var $account_id = 0;
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/**
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* @var array $data internal repository with acl rows for the given app and account-id (incl. memberships)
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*/
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var $data = Array();
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/**
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* internal reference to global db-object
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*
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* @var Db
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*/
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var $db;
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/**
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* @var string $table_name name of the acl_table
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*/
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const TABLE = 'egw_acl';
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/**
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* Cache for grants
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* @var array
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*/
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var $cache = array();
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/**
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* Constants for acl rights, like old EGW_ACL_* defines
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*/
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const READ = 1; // EGW_ACL_READ
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const ADD = 2; // EGW_ACL_ADD
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const EDIT = 4; // EGW_ACL_EDIT
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const DELETE = 8; // EGW_ACL_DELETE
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const PRIVAT = 16; // EGW_ACL_PRIVATE can NOT use PRIVATE as it is a PHP keyword, using German PRIVAT instead!
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const GROUPMGRS = 32; // EGW_ACL_GROUP_MANAGERS
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const CUSTOM1 = 64; // EGW_ACL_CUSTOM_1
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const CUSTOM2 = 128; // EGW_ACL_CUSTOM_2
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const CUSTOM3 = 256; // EGW_ACL_CUSTOM_3
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/**
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* ACL constructor for setting account id
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*
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* Sets the ID for $acl->account_id. Can be used to change a current instances id as well.
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* Some functions are specific to this account, and others are generic.
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*
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* @example acl->acl(5); // 5 is the user id
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* @param int $account_id = null user id or default null to use current user from $GLOBALS['egw_info']['user']['account_id']
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*/
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function __construct($account_id = null)
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{
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if (isset($GLOBALS['egw_setup']) && is_object($GLOBALS['egw_setup']->db))
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{
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$this->db = $GLOBALS['egw_setup']->db;
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}
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else
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{
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$this->db = $GLOBALS['egw']->db;
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}
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if ((int)$this->account_id != (int)$account_id)
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{
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$this->account_id = get_account_id((int)$account_id,@$GLOBALS['egw_info']['user']['account_id']);
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}
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$this->data = array();
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}
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/**
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* Magic method called before object get serialized
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*
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* We only store account_id class is constructed for (not data, which can be huge!) and
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* get_rights calls read_repository automatic, if data is empty.
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*/
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function __sleep()
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{
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return array('account_id','db');
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}
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/**************************************************************************\
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* These are the standard $this->account_id specific functions *
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\**************************************************************************/
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/**
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* Read acl records for $acl->account_id from reposity
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*
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* @param boolean|array $no_groups = false if true, do not use memberships, if array do not use given groups
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* @return array along with storing it in $acl->data. <br>
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*/
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function read_repository($no_groups=false)
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{
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// For some reason, calling this via XML-RPC doesn't call the constructor.
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// Here is yet another work around(tm) (jengo)
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if (!$this->account_id)
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{
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$this->__construct();
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}
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if ($no_groups === true || !(int)$this->account_id)
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{
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$acl_acc_list = $this->account_id;
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}
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else
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{
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$acl_acc_list = (array)$GLOBALS['egw']->accounts->memberships($this->account_id, true);
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if (is_array($no_groups)) $acl_acc_list = array_diff($acl_acc_list,$no_groups);
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array_unshift($acl_acc_list,$this->account_id);
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}
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$this->data = Array();
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foreach($this->db->select(self::TABLE,'*',array('acl_account' => $acl_acc_list ),__LINE__,__FILE__) as $row)
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{
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$this->data[$row['acl_appname'].'-'.$row['acl_location'].'-'.$row['acl_account']] = Db::strip_array_keys($row,'acl_');
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}
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return $this->data;
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}
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/**
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* Read acl records from $acl->data
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*
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* @return array all ACL records from $this->data.
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*/
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function read()
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{
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if (!count($this->data))
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{
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$this->read_repository();
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}
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return $this->data;
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}
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/**
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* Adds ACL record to the repository of the class
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*
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* Adds ACL record to $this->data.
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*
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* @param string $appname default False derives value from $GLOBALS['egw_info']['flags']['currentapp']
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* @param string $location location
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* @param int $rights rights
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* @return array all ACL records from $this->data.
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*/
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function add($appname,$location,$rights)
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{
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if (!$appname) $appname = $GLOBALS['egw_info']['flags']['currentapp'];
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$row = array(
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'appname' => $appname,
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'location' => $location,
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'account' => (int) $this->account_id,
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'rights' => (int) $rights
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);
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$this->data[$row['appname'].'-'.$row['location'].'-'.$row['account']] = $row;
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return $this->data;
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}
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/**
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* Delete ACL record in the repository of the class
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*
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* @param string $appname appname or '' for $GLOBALS['egw_info']['flags']['currentapp']
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* @param string|boolean $location location or false for all locations
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* @return array all ACL records from $this->data.
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*/
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function delete($appname,$location)
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{
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if (!$appname) $appname = $GLOBALS['egw_info']['flags']['currentapp'];
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foreach($this->data as $idx => $value)
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{
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if ($value['appname'] == $appname &&
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($location === false || $value['location'] == $location) &&
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$value['account'] == $this->account_id)
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{
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unset($this->data[$idx]);
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}
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}
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return $this->data;
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}
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/**
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* save the internal repository or the class
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*
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* @return array all ACL records from $this->data.
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*/
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function save_repository()
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{
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$this->db->delete(self::TABLE,array(
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'acl_account' => $this->account_id,
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),__LINE__,__FILE__);
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foreach($this->data as $value)
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{
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if ($value['account'] == $this->account_id)
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{
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$this->db->insert(self::TABLE,array(
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'acl_appname' => $value['appname'],
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'acl_location' => $value['location'],
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'acl_account' => $this->account_id,
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'acl_rights' => $value['rights'],
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),false,__LINE__,__FILE__);
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}
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}
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if ($this->account_id == $GLOBALS['egw_info']['user']['account_id'] &&
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method_exists($GLOBALS['egw'],'invalidate_session_cache')) // egw object in setup is limited
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{
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$GLOBALS['egw']->invalidate_session_cache();
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}
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return $this->data;
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}
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/**************************************************************************\
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* These are the non-standard $this->account_id specific functions *
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\**************************************************************************/
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/**
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* get rights from the class repository (included rights of $this->account_id and all it's memberships)
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*
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* @param string $location app location to get rights from
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* @param string $appname optional defaults to $GLOBALS['egw_info']['flags']['currentapp'];
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* @return int all rights or'ed together
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*/
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function get_rights($location,$appname = '')
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{
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// For XML-RPC, change this once its working correctly for passing parameters (jengo)
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if (is_array($location))
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{
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$appname = $location['appname'];
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$location = $location['location'];
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}
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if (!count($this->data))
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{
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$this->read_repository();
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}
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if (!$appname) $appname = $GLOBALS['egw_info']['flags']['currentapp'];
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if (!count($this->data) && $GLOBALS['egw_info']['server']['acl_default'] != 'deny')
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{
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return True;
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}
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$rights = 0;
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foreach($this->data as $value)
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{
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if ($value['appname'] == $appname)
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{
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if ($value['location'] == $location || $value['location'] == 'everywhere')
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{
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if ($value['rights'] == 0)
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{
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return False;
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}
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$rights |= $value['rights'];
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}
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}
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}
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return $rights;
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}
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/**
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* check required rights agains the internal repository (included rights of $this->account_id and all it's memberships)
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*
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* @param string $location app location
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* @param int $required required right to check against
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* @param string|false $appname optional defaults to currentapp
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* @return boolean
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*/
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function check($location, $required, $appname = False)
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{
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$rights = $this->get_rights($location,$appname);
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return !!($rights & $required);
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}
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/**
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* get specific rights for this->account_id for an app location
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*
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* @param string $location app location
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* @param string $appname = '' optional defaults to currentapp
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* @param array $memberships = array() additional account_id, eg. memberships to match beside $this->account_id, default none
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* @return int $rights
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*/
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function get_specific_rights($location, $appname = '', $memberships=array())
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{
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if (!$appname) $appname = $GLOBALS['egw_info']['flags']['currentapp'];
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if (!count($this->data) && $GLOBALS['egw_info']['server']['acl_default'] != 'deny')
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{
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return True;
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}
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$rights = 0;
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foreach($this->data as $value)
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{
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if ($value['appname'] == $appname &&
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($value['location'] == $location || $value['location'] == 'everywhere') &&
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($value['account'] == $this->account_id || $memberships && in_array($value['account'], $memberships)))
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{
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if ($value['rights'] == 0)
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{
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return False;
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}
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$rights |= $value['rights'];
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}
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}
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return $rights;
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}
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/**
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* check specific rights
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*
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* @param string $location app location
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* @param int $required required rights
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* @param string $appname optional defaults to currentapp
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* @return boolean
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*/
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function check_specific($location, $required, $appname = '')
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{
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$rights = $this->get_specific_rights($location,$appname);
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return !!($rights & $required);
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}
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/**************************************************************************\
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* These are the generic functions. Not specific to $this->account_id *
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\**************************************************************************/
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/**
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* add repository information / rights for app/location/account_id to the database
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*
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* @param string $app appname
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* @param string $location location
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* @param int $account_id account id
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* @param int $rights rights
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* @param boolean $invalidate_session =true false: do NOT invalidate session
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* @return int number of affected rows: 0: no change, 1: acl changed
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*/
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function add_repository($app, $location, $account_id, $rights, $invalidate_session=true)
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{
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//echo "<p>self::add_repository('$app','$location',$account_id,$rights);</p>\n";
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$this->db->insert(self::TABLE,array(
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'acl_rights' => $rights,
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),array(
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'acl_appname' => $app,
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'acl_location' => $location,
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'acl_account' => $account_id,
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),__LINE__,__FILE__);
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if ($invalidate_session && $account_id == $GLOBALS['egw_info']['user']['account_id'] &&
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method_exists($GLOBALS['egw'],'invalidate_session_cache')) // egw object in setup is limited
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{
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$GLOBALS['egw']->invalidate_session_cache();
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}
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return $this->db->affected_rows();
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}
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/**
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* delete repository information / rights for app/location[/account_id] from the DB
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*
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* @param string $app appname
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* @param string $location location
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* @param int|boolean $accountid = '' account id, default 0=$this->account_id, or false to delete all entries for $app/$location
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* @param boolean $invalidate_session =true false: do NOT invalidate session
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* @return int number of rows deleted
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*/
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function delete_repository($app, $location, $accountid='', $invalidate_session=true)
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{
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static $cache_accountid = array();
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$where = array(
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'acl_appname' => $app,
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'acl_location' => $location,
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);
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if ($accountid !== false)
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{
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if(isset($cache_accountid[$accountid]) && $cache_accountid[$accountid])
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{
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$where['acl_account'] = $cache_accountid[$accountid];
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}
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else
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{
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$where['acl_account'] = $cache_accountid[$accountid] = get_account_id($accountid,$this->account_id);
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}
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}
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if ($app == '%' || $app == '%%') unset($where['acl_appname']);
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$this->db->delete(self::TABLE,$where,__LINE__,__FILE__);
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$deleted = $this->db->affected_rows();
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if ($invalidate_session && $deleted && method_exists($GLOBALS['egw'],'invalidate_session_cache')) // egw object in setup is limited
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{
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$GLOBALS['egw']->invalidate_session_cache();
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}
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return $deleted;
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}
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/**
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* Get rights for a given account, location and application
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*
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* @param int $account_id
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* @param string $location
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* @param string $appname = '' defaults to current app
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* @return int/boolean rights or false if none exist
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*/
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function get_specific_rights_for_account($account_id,$location,$appname='')
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{
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if (!$appname) $appname = $GLOBALS['egw_info']['flags']['currentapp'];
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return $this->db->select(self::TABLE,'acl_rights',array(
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'acl_location' => $location,
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'acl_account' => $account_id,
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'acl_appname' => $appname,
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),__LINE__,__FILE__)->fetchColumn();
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}
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/**
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* Get all rights for a given location and application
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*
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* @param string $location
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* @param string $appname = '' defaults to current app
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* @return array with account => rights pairs
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*/
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function get_all_rights($location,$appname='')
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{
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if (!$appname) $appname = $GLOBALS['egw_info']['flags']['currentapp'];
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$rights = array();
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foreach($this->db->select(self::TABLE,'acl_account,acl_rights',array(
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'acl_location' => $location,
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'acl_appname' => $appname,
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),__LINE__,__FILE__) as $row)
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{
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$rights[$row['acl_account']] = $row['acl_rights'];
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}
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return $rights;
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}
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/**
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* Get the rights for all locations
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*
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* @param int $account_id
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* @param string $appname = '' defaults to current app
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* @param boolean $use_memberships = true
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* @return array with location => rights pairs
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*/
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function get_all_location_rights($account_id,$appname='',$use_memberships=true)
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{
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if (!$appname) $appname = $GLOBALS['egw_info']['flags']['currentapp'];
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$accounts = array($account_id);
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if ($use_memberships && (int)$account_id > 0)
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{
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$accounts = $GLOBALS['egw']->accounts->memberships($account_id, true);
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$accounts[] = $account_id;
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}
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$rights = array();
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foreach($this->db->select(self::TABLE,'acl_location,acl_rights',array(
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'acl_account' => $accounts,
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'acl_appname' => $appname,
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),__LINE__,__FILE__) as $row)
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{
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if (!isset($rights[$row['acl_location']]))
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{
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$rights[$row['acl_location']] = 0;
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}
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$rights[$row['acl_location']] |= $row['acl_rights'];
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}
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return $rights;
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}
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/**
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* get application list for an account id
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*
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* @param string $location location
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* @param int $required required rights
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* @param int $accountid account id defaults to $GLOBALS['egw_info']['user']['account_id'];
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* @return array with app-names ([] if there are none)
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*/
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function get_app_list_for_id($location, $required, $accountid = '')
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{
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static $cache_accountid = array();
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if(isset($cache_accountid[$accountid]))
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{
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$account_id = $cache_accountid[$accountid];
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}
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else
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{
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$account_id = get_account_id($accountid,$this->account_id);
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$cache_accountid[$accountid] = $account_id;
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}
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$rights = 0;
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$apps = [];
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foreach($this->db->select(self::TABLE,array('acl_appname','acl_rights'),array(
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'acl_location' => $location,
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'acl_account' => $account_id,
|
|
),__LINE__,__FILE__) as $row)
|
|
{
|
|
if ($row['acl_rights'] == 0)
|
|
{
|
|
return False;
|
|
}
|
|
$rights |= $row['acl_rights'];
|
|
if (!!($rights & $required))
|
|
{
|
|
$apps[] = $row['acl_appname'];
|
|
}
|
|
}
|
|
return $apps;
|
|
}
|
|
|
|
/**
|
|
* get location list for id
|
|
*
|
|
* @param string $app app
|
|
* @param int $required required rights
|
|
* @param int $accountid optional defaults to $GLOBALS['egw_info']['user']['account_id'];
|
|
* @return array with location-strings ([] if there are none)
|
|
*/
|
|
function get_location_list_for_id($app, $required, $accountid = '')
|
|
{
|
|
static $cache_accountid = array();
|
|
|
|
if(isset($cache_accountid[$accountid]))
|
|
{
|
|
$accountid = $cache_accountid[$accountid];
|
|
}
|
|
else
|
|
{
|
|
$accountid = $cache_accountid[$accountid] = get_account_id($accountid,$this->account_id);
|
|
}
|
|
$locations = [];
|
|
foreach($this->db->select(self::TABLE,'acl_location,acl_rights',array(
|
|
'acl_appname' => $app,
|
|
'acl_account' => $accountid,
|
|
),__LINE__,__FILE__) as $row)
|
|
{
|
|
if ($row['acl_rights'] & $required)
|
|
{
|
|
$locations[] = $row['acl_location'];
|
|
}
|
|
}
|
|
return $locations;
|
|
}
|
|
|
|
/**
|
|
* get ids for location
|
|
*
|
|
* @param string $location location
|
|
* @param int $required required rights
|
|
* @param string $app app optional defaults to $GLOBALS['egw_info']['flags']['currentapp'];
|
|
* @return array of account-ids ([] if there are none in the db)
|
|
*/
|
|
function get_ids_for_location($location, $required, $app = '')
|
|
{
|
|
if (!$app) $app = $GLOBALS['egw_info']['flags']['currentapp'];
|
|
|
|
$accounts = [];
|
|
foreach($this->db->select(self::TABLE,array('acl_account','acl_rights'),array(
|
|
'acl_appname' => $app,
|
|
'acl_location' => $location,
|
|
),__LINE__,__FILE__) as $row)
|
|
{
|
|
if (!!($row['acl_rights'] & $required))
|
|
{
|
|
$accounts[] = (int) $row['acl_account'];
|
|
}
|
|
}
|
|
return $accounts;
|
|
}
|
|
|
|
/**
|
|
* get the locations for an app (excluding the run location !!!)
|
|
*
|
|
* @param string $app app optional defaults to $GLOBALS['egw_info']['flags']['currentapp'];
|
|
* @return array of locations ([] if there are none)
|
|
*/
|
|
function get_locations_for_app($app='')
|
|
{
|
|
if (!$app) $app = $GLOBALS['egw_info']['flags']['currentapp'];
|
|
|
|
$locations = [];
|
|
foreach($this->db->select(self::TABLE,'DISTINCT '.'acl_location',array(
|
|
'acl_appname' => $app,
|
|
),__LINE__,__FILE__) as $row)
|
|
{
|
|
if (($location = $row['acl_location']) != 'run')
|
|
{
|
|
$locations[] = $location;
|
|
}
|
|
}
|
|
return $locations;
|
|
}
|
|
|
|
/**
|
|
* get a list of applications a user has rights to
|
|
*
|
|
* @param int $accountid = '' optional defaults to $GLOBALS['egw_info']['user']['account_id'];
|
|
* @param boolean $use_memberships = true true: use memberships too, false: only use given account
|
|
* @param boolean $add_implicit_apps = true true: add apps every user has implicit rights
|
|
* @return array containing list of apps
|
|
*/
|
|
function get_user_applications($accountid = '', $use_memberships=true, $add_implicit_apps=true)
|
|
{
|
|
static $cache_accountid = array();
|
|
|
|
if(isset($cache_accountid[$accountid]))
|
|
{
|
|
$account_id = $cache_accountid[$accountid];
|
|
}
|
|
else
|
|
{
|
|
$account_id = get_account_id($accountid,$this->account_id);
|
|
$cache_accountid[$accountid] = $account_id;
|
|
}
|
|
if ($use_memberships && (int)$account_id > 0) $memberships = $GLOBALS['egw']->accounts->memberships($account_id, true);
|
|
$memberships[] = (int)$account_id;
|
|
|
|
$apps = array();
|
|
foreach($this->db->select(self::TABLE,array('acl_appname','acl_rights'),array(
|
|
'acl_location' => 'run',
|
|
'acl_account' => $memberships,
|
|
),__LINE__,__FILE__) as $row)
|
|
{
|
|
$app = $row['acl_appname'];
|
|
if(!isset($apps[$app]))
|
|
{
|
|
$apps[$app] = 0;
|
|
}
|
|
$apps[$app] |= (int) $row['acl_rights'];
|
|
}
|
|
if ($add_implicit_apps)
|
|
{
|
|
$apps['api'] = 1; // give everyone implicit rights for the home app
|
|
}
|
|
return $apps;
|
|
}
|
|
|
|
/**
|
|
* Read the grants other users gave $this->account_id for $app, group ACL is taken into account
|
|
*
|
|
* @param string $app optional defaults to $GLOBALS['egw_info']['flags']['currentapp']
|
|
* @param boolean|array $enum_group_acls = true should group acls be returned for all members of that group, default yes
|
|
* if an array of group-id's is given, that id's will NOT be enumerated!
|
|
* @param int $user = null user whos grants to return, default current user
|
|
* @return array with account-ids (of owners) and granted rights as values
|
|
*/
|
|
function get_grants($app='',$enum_group_acls=true,$user=null)
|
|
{
|
|
if (!$app) $app = $GLOBALS['egw_info']['flags']['currentapp'];
|
|
if (!$user) $user = $this->account_id;
|
|
|
|
$cache = $this->cache; // some caching within the request
|
|
|
|
$grants =& $cache[$app][$user];
|
|
if (!isset($grants))
|
|
{
|
|
if ((int)$user > 0) $memberships = $GLOBALS['egw']->accounts->memberships($user, true);
|
|
$memberships[] = $user;
|
|
|
|
$grants = $accounts = Array();
|
|
foreach($this->db->select(self::TABLE,array('acl_account','acl_rights','acl_location'),array(
|
|
'acl_appname' => $app,
|
|
'acl_location' => $memberships,
|
|
),__LINE__,__FILE__) as $row)
|
|
{
|
|
$grantor = $row['acl_account'];
|
|
$rights = $row['acl_rights'];
|
|
|
|
if(!isset($grants[$grantor]))
|
|
{
|
|
$grants[$grantor] = 0;
|
|
}
|
|
$grants[$grantor] |= $rights;
|
|
|
|
// if the right is granted from a group and we enummerated group ACL's
|
|
if ($GLOBALS['egw']->accounts->get_type($grantor) == 'g' && $enum_group_acls &&
|
|
(!is_array($enum_group_acls) || !in_array($grantor,$enum_group_acls)))
|
|
{
|
|
// return the grant for each member of the group (false = also for no longer active users)
|
|
foreach((array)$GLOBALS['egw']->accounts->members($grantor, true, false) as $grantor)
|
|
{
|
|
if (!$grantor) continue; // can happen if group has no members
|
|
|
|
// Don't allow to override private with group ACL's!
|
|
$rights &= ~self::PRIVAT;
|
|
|
|
if(!isset($grants[$grantor]))
|
|
{
|
|
$grants[$grantor] = 0;
|
|
}
|
|
$grants[$grantor] |= $rights;
|
|
}
|
|
}
|
|
}
|
|
// user has implizit all rights on own data
|
|
$grants[$user] = ~0;
|
|
}
|
|
//echo "self::get_grants('$app',$enum_group_acls) ".function_backtrace(); _debug_array($grants);
|
|
return $grants;
|
|
}
|
|
|
|
/**
|
|
* Get grants for a single app
|
|
*
|
|
* We use a "get-grants" hook, in case an app need more then what Acl::get_grants returns (with default parameters!).
|
|
*
|
|
* @param string $_app app-name
|
|
* @return array
|
|
*/
|
|
function ajax_get_grants($_app=null)
|
|
{
|
|
if (!($grants = Hooks::single('get-grants', $_app)))
|
|
{
|
|
$grants = $this->get_grants($_app);
|
|
}
|
|
return $grants;
|
|
}
|
|
|
|
/**
|
|
* Get grants for all apps
|
|
*
|
|
* @return array with app => array of grants pairs
|
|
*/
|
|
function ajax_get_all_grants()
|
|
{
|
|
$app_grants = [];
|
|
foreach(array_keys($GLOBALS['egw_info']['user']['apps']) as $app)
|
|
{
|
|
$app_grants[$app] = $this->get_grants($app);
|
|
}
|
|
return $app_grants;
|
|
}
|
|
|
|
/**
|
|
* Deletes all ACL entries for an account (user or group)
|
|
*
|
|
* @param int $account_id acount-id
|
|
*/
|
|
function delete_account($account_id)
|
|
{
|
|
if ((int) $account_id)
|
|
{
|
|
// Delete all grants from this account
|
|
$this->db->delete(self::TABLE,array(
|
|
'acl_account' => $account_id
|
|
),__LINE__,__FILE__);
|
|
// Delete all grants to this account
|
|
$this->db->delete(self::TABLE,array(
|
|
'acl_location' => $account_id
|
|
),__LINE__, __FILE__);
|
|
// delete all memberships in account_id (if it is a group)
|
|
$this->db->delete(self::TABLE,array(
|
|
'acl_appname' => 'phpgw_group',
|
|
'acl_location' => $account_id,
|
|
),__LINE__,__FILE__);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* get the locations for an app (excluding the run location !!!)
|
|
*
|
|
* @param string $location location, can contain wildcards % or ?
|
|
* @param string $app app optional defaults to $GLOBALS['egw_info']['flags']['currentapp'];
|
|
* @return array with location => array(account => rights) pairs
|
|
*/
|
|
function get_location_grants($location,$app='')
|
|
{
|
|
if (!$app) $app = $GLOBALS['egw_info']['flags']['currentapp'];
|
|
|
|
$locations = array();
|
|
foreach($this->db->select(self::TABLE,'acl_location,acl_account,acl_rights',array(
|
|
'acl_appname' => $app,
|
|
'acl_location LIKE '.$this->db->quote($location),
|
|
),__LINE__,__FILE__) as $row)
|
|
{
|
|
if (($location = $row['acl_location']) != 'run')
|
|
{
|
|
$locations[$location][$row['acl_account']] = $row['acl_rights'];
|
|
}
|
|
}
|
|
return $locations;
|
|
}
|
|
} |