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egroupware_official/phpgwapi/inc/class.acl.inc.php

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<?php
/**************************************************************************\
* phpGroupWare API - Access Control List *
* This file written by Dan Kuykendall <seek3r@phpgroupware.org> *
* Security scheme based on ACL design *
* Copyright (C) 2000, 2001 Dan Kuykendall *
* -------------------------------------------------------------------------*
* This library is part of the phpGroupWare API *
* http://www.phpgroupware.org/api *
* ------------------------------------------------------------------------ *
* This library is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 2.1 of the License, *
* or any later version. *
* This library is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
* See the GNU Lesser General Public License for more details. *
* You should have received a copy of the GNU Lesser General Public License *
* along with this library; if not, write to the Free Software Foundation, *
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
\**************************************************************************/
/* $Id$ */
/*!
@class acl
@abstract Acces Control List Security System
@discussion This class provides an ACL security scheme.
This can manage rights to 'run' applications, and limit certain features within an application.
It is also used for granting a user "membership" to a group, or making a user have the security equivilance of another user.
It is also used for granting a user or group rights to various records, such as todo or calendar items of another user.
@syntax CreateObject('phpgwapi.acl',int account_id);
@example $acl = CreateObject('phpgwapi.acl',5); // 5 is the user id
@example $acl = CreateObject('phpgwapi.acl',10); // 10 is the user id
@author Seek3r
@copyright LGPL
@package phpgwapi
@access public
*/
class acl
{ /*! @var $account_id */
var $account_id;
/*! @var $account_type */
var $account_type;
/*! @var $data */
var $data = Array();
/*! @var $db */
var $db;
/*!
@function acl
@abstract ACL constructor for setting account id
@discussion Author: Seek3r <br>
Sets the ID for $acl->account_id. Can be used to change a current instances id as well. <br>
Some functions are specific to this account, and others are generic. <br>
Syntax: int acl(int account_id) <br>
Example1: acl->acl(5); // 5 is the user id <br>
@param account_id int-the user id
*/
function acl($account_id = '')
{
$this->db = $GLOBALS['phpgw']->db;
if($account_id != '')
{
$this->account_id = get_account_id($account_id,$GLOBALS['phpgw_info']['user']['account_id']);
}
}
/**************************************************************************\
* These are the standard $this->account_id specific functions *
\**************************************************************************/
/*!
@function read_repository
@abstract Read acl records from reposity
@discussion Author: Seek3r <br>
Reads ACL records for $acl->account_id and returns array along with storing it in $acl->data. <br>
Syntax: array read_repository() <br>
Example1: acl->read_repository(); <br>
Should only be called within this class
*/
function read_repository()
{
$sql = 'select * from phpgw_acl where (acl_account in ('.$this->account_id.', 0';
$groups = $this->get_location_list_for_id('phpgw_group', 1, $this->account_id);
while($groups && list($key,$value) = each($groups))
{
$sql .= ','.$value;
}
$sql .= '))';
$this->db->query($sql ,__LINE__,__FILE__);
$count = $this->db->num_rows();
$this->data = Array();
for ($idx = 0; $idx < $count; ++$idx)
{
//reset ($this->data);
//while(list($idx,$value) = each($this->data)){
$this->db->next_record();
$this->data[] = array(
'appname' => $this->db->f('acl_appname'),
'location' => $this->db->f('acl_location'),
'account' => $this->db->f('acl_account'),
'rights' => $this->db->f('acl_rights')
);
}
reset ($this->data);
return $this->data;
}
/*!
@function read
@abstract Read acl records from $acl->data
@discussion Author: Seek3r <br>
Returns ACL records from $acl->data. <br>
Syntax: array read() <br>
Example1: acl->read(); <br>
*/
function read()
{
if (count($this->data) == 0){ $this->read_repository(); }
reset ($this->data);
return $this->data;
}
/*!
@function add
@abstract Adds ACL record to $acl->data
@discussion Adds ACL record to $acl->data. <br>
Syntax: array add() <br>
Example1: acl->add();
@param $appname default False derives value from $phpgw_info['flags']['currentapp']
@param $location location
@param $rights rights
*/
function add($appname = False, $location, $rights)
{
if ($appname == False)
{
settype($appname,'string');
$appname = $GLOBALS['phpgw_info']['flags']['currentapp'];
}
$this->data[] = array('appname' => $appname, 'location' => $location, 'account' => $this->account_id, 'rights' => $rights);
reset($this->data);
return $this->data;
}
/*!
@function delete
@abstract Delete ACL record
@discussion
Syntax <br>
Example: <br>
@param $appname optional defaults to $phpgw_info['flags']['currentapp']
@param $location app location
*/
function delete($appname = False, $location)
{
if ($appname == False)
{
settype($appname,'string');
$appname = $GLOBALS['phpgw_info']['flags']['currentapp'];
}
$count = count($this->data);
reset ($this->data);
while(list($idx,$value) = each($this->data))
{
if ($this->data[$idx]['appname'] == $appname && $this->data[$idx]['location'] == $location && $this->data[$idx]['account'] == $this->account_id)
{
$this->data[$idx] = Array();
}
}
reset($this->data);
return $this->data;
}
/*!
@function save_repostiory
@abstract save repository
@discussion save the repository <br>
Syntax: save_repository() <br>
example: acl->save_repository()
*/
function save_repository()
{
reset($this->data);
$sql = 'delete from phpgw_acl where acl_account = '.$this->account_id;
$this->db->query($sql ,__LINE__,__FILE__);
$count = count($this->data);
reset ($this->data);
while(list($idx,$value) = each($this->data))
{
if ($this->data[$idx]['account'] == $this->account_id)
{
$sql = 'insert into phpgw_acl (acl_appname, acl_location, acl_account, acl_rights)';
$sql .= " values('".$this->data[$idx]['appname']."', '"
. $this->data[$idx]['location']."', ".$this->account_id.', '.$this->data[$idx]['rights'].')';
$this->db->query($sql ,__LINE__,__FILE__);
}
}
reset($this->data);
return $this->data;
}
/**************************************************************************\
* These are the non-standard $this->account_id specific functions *
\**************************************************************************/
/*!
@function get_rights
@abstract get rights from the repository not specific to this->account_id (?)
@discussion
@param $location app location to get rights from
@param $appname optional defaults to $phpgw_info['flags']['currentapp'];
*/
function get_rights($location,$appname = False)
{
if (count($this->data) == 0){ $this->read_repository(); }
reset ($this->data);
if ($appname == False)
{
settype($appname,'string');
$appname = $GLOBALS['phpgw_info']['flags']['currentapp'];
}
$count = count($this->data);
if ($count == 0 && $GLOBALS['phpgw_info']['server']['acl_default'] != 'deny'){ return True; }
$rights = 0;
//for ($idx = 0; $idx < $count; ++$idx){
reset ($this->data);
while(list($idx,$value) = each($this->data))
{
if ($this->data[$idx]['appname'] == $appname)
{
if ($this->data[$idx]['location'] == $location || $this->data[$idx]['location'] == 'everywhere')
{
if ($this->data[$idx]['rights'] == 0){ return False; }
$rights |= $this->data[$idx]['rights'];
}
}
}
return $rights;
}
/*!
@function check
@abstract check required rights (not specific to this->account_id?)
@param $location app location
@param $required required right to check against
@param $appname optional defaults to currentapp
*/
function check($location, $required, $appname = False)
{
$rights = $this->get_rights($location,$appname);
return !!($rights & $required);
}
/*!
@function get_specific_rights
@abstract get specific rights for this->account_id for an app location
@param $location app location
@param $appname optional defaults to currentapp
@result $rights ?
*/
function get_specific_rights($location, $appname = False)
{
if ($appname == False)
{
settype($appname,'string');
$appname = $GLOBALS['phpgw_info']['flags']['currentapp'];
}
$count = count($this->data);
if ($count == 0 && $GLOBALS['phpgw_info']['server']['acl_default'] != 'deny'){ return True; }
$rights = 0;
reset ($this->data);
while(list($idx,$value) = each($this->data))
{
if ($this->data[$idx]['appname'] == $appname &&
($this->data[$idx]['location'] == $location ||
$this->data[$idx]['location'] == 'everywhere') &&
$this->data[$idx]['account'] == $this->account_id)
{
if ($this->data[$idx]['rights'] == 0){ return False; }
$rights |= $this->data[$idx]['rights'];
}
}
return $rights;
}
/*!
@function check_specific
@abstract check specific
@param $location app location
@param $required required rights
@param $appname optional defaults to currentapp
@result boolean
*/
function check_specific($location, $required, $appname = False)
{
$rights = $this->get_specific_rights($location,$appname);
return !!($rights & $required);
}
/*!
@function get_location_list
@abstract ?
@param $app appname
@param $required ?
*/
function get_location_list($app, $required)
{
// User piece
$sql = "select acl_location, acl_rights from phpgw_acl where acl_appname = '$app' ";
$sql .= " and (acl_account in ('".$this->account_id."', 0"; // group 0 covers all users
$equalto = $GLOBALS['phpgw']->accounts->security_equals($this->account_id);
if (is_array($equalto) && count($equalto) > 0)
{
for ($idx = 0; $idx < count($equalto); ++$idx)
{
$sql .= ','.$equalto[$idx][0];
}
}
$sql .= ')))';
$this->db->query($sql ,__LINE__,__FILE__);
$rights = 0;
if ($this->db->num_rows() == 0 ){ return False; }
while ($this->db->next_record())
{
if ($this->db->f('acl_rights') == 0){ return False; }
$rights |= $this->db->f('acl_rights');
if (!!($rights & $required) == True)
{
$locations[] = $this->db->f('acl_location');
}
else
{
return False;
}
}
return $locations;
}
/*
This is kinda how the function SHOULD work, so that it doesnt need to do its own sql query.
It should use the values in the $this->data
function get_location_list($app, $required)
{
if ($appname == False)
{
$appname = $GLOBALS['phpgw_info']['flags']['currentapp'];
}
$count = count($this->data);
if ($count == 0 && $GLOBALS['phpgw_info']['server']['acl_default'] != 'deny'){ return True; }
$rights = 0;
reset ($this->data);
while(list($idx,$value) = each($this->data))
{
if ($this->data[$idx]['appname'] == $appname && $this->data[$idx]['rights'] != 0)
{
$location_rights[$this->data[$idx]['location']] |= $this->data[$idx]['rights'];
}
}
reset($location_rights);
for ($idx = 0; $idx < count($location_rights); ++$idx)
{
if (!!($location_rights[$idx] & $required) == True)
{
$location_rights[] = $this->data[$idx]['location'];
}
}
return $locations;
}
*/
/**************************************************************************\
* These are the generic functions. Not specific to $this->account_id *
\**************************************************************************/
/*!
@function add_repository
@abstract add repository information for an app
@param $app appname
@param $location location
@param $account_id account id
@param $rights rights
*/
function add_repository($app, $location, $account_id, $rights)
{
$this->delete_repository($app, $location, $account_id);
$sql = 'insert into phpgw_acl (acl_appname, acl_location, acl_account, acl_rights)';
$sql .= " values ('" . $app . "','" . $location . "','" . $account_id . "','" . $rights . "')";
$this->db->query($sql ,__LINE__,__FILE__);
return True;
}
/*!
@function delete_repository
@abstract delete repository information for an app
@param $app appname
@param $location location
@param $account_id account id
*/
function delete_repository($app, $location, $accountid = '')
{
static $cache_accountid;
if(isset($cache_accountid[$accountid]) && $cache_accountid[$accountid])
{
$account_id = $cache_accountid[$accountid];
}
else
{
$account_id = get_account_id($accountid,$this->account_id);
$cache_accountid[$accountid] = $account_id;
}
$sql = "delete from phpgw_acl where acl_appname like '".$app."'"
. " and acl_location like '".$location."' and "
. " acl_account = ".$account_id;
$this->db->query($sql ,__LINE__,__FILE__);
return $this->db->num_rows();
}
/*!
@function get_app_list_for_id
@abstract get application list for an account id
@param $location location
@param $required ?
@param $account_id account id defaults to $phpgw_info['user']['account_id'];
*/
function get_app_list_for_id($location, $required, $accountid = '')
{
static $cache_accountid;
if($cache_accountid[$accountid])
{
$account_id = $cache_accountid[$accountid];
}
else
{
$account_id = get_account_id($accountid,$this->account_id);
$cache_accountid[$accountid] = $account_id;
}
$sql = "select acl_appname, acl_rights from phpgw_acl where acl_location = '$location' and ";
$sql .= 'acl_account = '.$account_id;
$this->db->query($sql ,__LINE__,__FILE__);
$rights = 0;
if ($this->db->num_rows() == 0 ){ return False; }
while ($this->db->next_record())
{
if ($this->db->f('acl_rights') == 0){ return False; }
$rights |= $this->db->f('acl_rights');
if (!!($rights & $required) == True)
{
$apps[] = $this->db->f('acl_appname');
}
}
return $apps;
}
/*!
@function get_location_list_for_id
@abstract get location list for id
@discussion ?
@param $app app
@param $required required
@param $account_id optional defaults to $phpgw_info['user']['account_id'];
*/
function get_location_list_for_id($app, $required, $accountid = '')
{
static $cache_accountid;
if($cache_accountid[$accountid])
{
$account_id = $cache_accountid[$accountid];
}
else
{
$account_id = get_account_id($accountid,$this->account_id);
$cache_accountid[$accountid] = $account_id;
}
$sql = "select acl_location, acl_rights from phpgw_acl where acl_appname = '$app' and ";
$sql .= "acl_account = ".$account_id;
$this->db->query($sql ,__LINE__,__FILE__);
$rights = 0;
if ($this->db->num_rows() == 0 ){ return False; }
while ($this->db->next_record())
{
if ($this->db->f('acl_rights'))
{
$rights |= $this->db->f('acl_rights');
if (!!($rights & $required) == True)
{
$locations[] = $this->db->f('acl_location');
}
}
}
return $locations;
}
/*!
@function get_ids_for_location
@abstract get ids for location
@param $location location
@param $required required
@param $app app optional defaults to $phpgw_info['flags']['currentapp'];
*/
function get_ids_for_location($location, $required, $app = False)
{
if ($app == False)
{
$app = $GLOBALS['phpgw_info']['flags']['currentapp'];
}
$sql = "select acl_account, acl_rights from phpgw_acl where acl_appname = '$app' and ";
$sql .= "acl_location = '".$location."'";
$this->db->query($sql ,__LINE__,__FILE__);
$rights = 0;
if ($this->db->num_rows() == 0 ){ return False; }
while ($this->db->next_record())
{
$rights = 0;
$rights |= $this->db->f('acl_rights');
if (!!($rights & $required) == True)
{
$accounts[] = intval($this->db->f('acl_account'));
}
}
@reset($accounts);
return $accounts;
}
/*!
@function get_user_applications
@abstract get a list of applications a user has rights to
@param $account_id optional defaults to $phpgw_info['user']['account_id'];
@result $apps array containing list of apps
*/
function get_user_applications($accountid = '')
{
static $cache_accountid;
if($cache_accountid[$accountid])
{
$account_id = $cache_accountid[$accountid];
}
else
{
$account_id = get_account_id($accountid,$this->account_id);
$cache_accountid[$accountid] = $account_id;
}
$db2 = $this->db;
$memberships = $GLOBALS['phpgw']->accounts->membership($account_id);
$sql = "select acl_appname, acl_rights from phpgw_acl where acl_location = 'run' and "
. 'acl_account in ';
$security = '('.$account_id;
while($groups = @each($memberships))
{
$group = each($groups);
$security .= ','.$group[1]['account_id'];
}
$security .= ')';
$db2->query($sql . $security ,__LINE__,__FILE__);
if ($db2->num_rows() == 0){ return False; }
while ($db2->next_record())
{
if(isset($apps[$db2->f('acl_appname')]))
{
$rights = $apps[$db2->f('acl_appname')];
}
else
{
$rights = 0;
$apps[$db2->f('acl_appname')] = 0;
}
$rights |= $db2->f('acl_rights');
$apps[$db2->f('acl_appname')] |= $rights;
}
return $apps;
}
/*!
@function get_grants
@abstract ?
@param $app optional defaults to $phpgw_info['flags']['currentapp'];
*/
function get_grants($app='')
{
$db2 = $this->db;
if ($app=='')
{
$app = $GLOBALS['phpgw_info']['flags']['currentapp'];
}
$sql = "select acl_account, acl_rights from phpgw_acl where acl_appname = '$app' and "
. "acl_location in ";
$security = "('". $this->account_id ."'";
$myaccounts = CreateObject('phpgwapi.accounts');
$my_memberships = $myaccounts->membership($this->account_id);
unset($myaccounts);
@reset($my_memberships);
while($my_memberships && list($key,$group) = each($my_memberships))
{
$security .= ",'" . $group['account_id'] . "'";
}
$security .= ')';
$db2->query($sql . $security ,__LINE__,__FILE__);
$rights = 0;
$accounts = Array();
if ($db2->num_rows() == 0)
{
$grants[$GLOBALS['phpgw_info']['user']['account_id']] = 31;
return $grants;
}
while ($db2->next_record())
{
$grantor = $db2->f('acl_account');
$rights = $db2->f('acl_rights');
if(!isset($accounts[$grantor]))
// cache the group-members for performance
{
// if $grantor is a group, get its members
$members = $this->get_ids_for_location($grantor,1,'phpgw_group');
if(!$members)
{
$accounts[$grantor] = Array($grantor);
$is_group[$grantor] = False;
}
else
{
$accounts[$grantor] = $members;
$is_group[$grantor] = True;
}
}
if(@$is_group[$grantor])
{
// Don't allow to override private!
$rights &= (~ PHPGW_ACL_PRIVATE);
if(!isset($grants[$grantor]))
{
$grants[$grantor] = 0;
}
if(!!($rights & PHPGW_ACL_READ))
{
$grants[$grantor] = PHPGW_ACL_READ;
}
}
while(list($nul,$grantors) = each($accounts[$grantor]))
{
if(!isset($grants[$grantors]))
{
$grants[$grantors] = 0;
}
$grants[$grantors] |= $rights;
}
reset($accounts[$grantor]);
}
$grants[$GLOBALS['phpgw_info']['user']['account_id']] = 31;
return $grants;
}
} //end of acl class
?>
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