LDAPAccountManager/lam/lib/cache.inc

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<?php
/*
$Id$
This code is part of LDAP Account Manager (http://www.sourceforge.net/projects/lam)
Copyright (C) 2003 Tilo Lutz
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
LDAP Account Manager functions used by account.php
*/
/* This class contains all functions
* which are needed to manage the ldap cache
*/
class cache {
function cache() {
$this->time = 0;
$this->attributes = array();
}
var $ldapcache; // This variable contains the cache
var $attributes; // This variable contains a list and their scope of attributes which should be cached
var $time; // This is the laste timestamp ldap cache has been refreshed
/* This function adds attributes to cache
* syntax of $attributes is array( scope1 => array ( attributes ), scope2 => array ( attributes ), ...)
*/
function add_cache($attributes) {
// Check input variable
$allowed_types = array ( 'user', 'group', 'host', 'domain', '*' );
if (!is_array($attributes)) trigger_error(_('Argument of add_cache must be : array ( scope => array(attribute1(string), attribute2(string), ..), scope => ... ).'), E_USER_ERROR);
foreach ($attributes as $attribute) {
if (!is_array($attribute)) trigger_error(_('Argument of add_cache must be : array ( scope => array(attribute1(string), attribute2(string), ..), scope => ... ).'), E_USER_ERROR);
foreach ($attribute as $singleattribute) {
if (!is_string($singleattribute)) trigger_error(_('Argument of add_cache must be : array ( scope => array(attribute1(string), attribute2(string), ..), scope => ... ).'), E_USER_ERROR);
}
}
$scopes = array_keys($attributes);
foreach ($scopes as $scope) {
if (!@in_array($scope, $allowed_types)) trigger_error(sprintf(_('Invalid scope. Valid scopes are %s.'), implode(" ", $allowed_types)), E_USER_ERROR);
}
// Everything seems to be OK, start processing data
foreach ($scopes as $scope) {
for ($i=0; $i<count($attributes[$scope]); $i++ ) {
if (!@in_array($attributes[$scope][$i] ,$this->attributes[$scope])) $this->attributes[$scope][] = $attributes[$scope][$i];
}
}
// Rebuild cache
$this->refresh_cache(true);
}
/* This function returns an array ( dn1 => array(uidnumber1), dn2 => array(uidnumber2), ... )
*
*/
function get_cache($attribute, $objectClass, $singlescope) {
$this->refresh_cache();
// Check input variables
$allowed_types = array ( 'user', 'group', 'host', 'domain', '*' );
if (!in_array($singlescope, $allowed_types)) trigger_error(sprintf(_('Invalid scope. Valid scopes are %s.'), implode(" ", $allowed_types)), E_USER_ERROR);
$line=-1;
for ($i=0; $i<count($_SESSION['ldap']->objectClasses) || $i==-1; $i++) {
if (strpos($_SESSION['ldap']->objectClasses[$i], "NAME '$objectClass'")) $line = $i;
}
// Return error if objectClass isn't found
if ($line==-1) trigger_error (sprintf(_("objectClass %s required but not defined in ldap."), $objectClass), E_USER_WARNING);
// Create list of all allowed attributes
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for ($i=0; $i<count($_SESSION['ldap']->objectClasses); $i++ ) {
if (strpos($_SESSION['ldap']->objectClasses[$i], 'MUST (')) {
$string_withtail = substr($_SESSION['ldap']->objectClasses[$i], strpos($_SESSION['ldap']->objectClasses[$i], 'MUST (')+6);
// Now we have a string with all must-attributes
$string = substr($string_withtail, 0, strpos($string_withtail, ')'));
$string = trim($string);
$allowed_attributes = array_merge($allowed_attributes, explode(" $ ", $string));
}
// create array with may-attributes
// Get startposition in string
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if (strpos($_SESSION['ldap']->objectClasses[$i], 'MAY (')) {
$string_withtail = substr($_SESSION['ldap']->objectClasses[$i], strpos($_SESSION['ldap']->objectClasses[$i], 'MAY (')+5);
// Now we have a string with all must-attributes
$string = substr($string_withtail, 0, strpos($string_withtail, ')'));
$string = trim($string);
$allowed_attributes = array_merge($allowed_attributes, explode(" $ ", $string));
}
}
$allowed_attributes = array_unique($allowed_attributes);
if (!in_array($attribute, $allowed_attributes)) trigger_error(_('Attribute not defined in LDAP.'), E_USER_WARNING);
// Everything seems to be OK, start processing data
$this->refresh_cache();
if ($singlescope == '*') $scopes = $allowed_types;
else $scopes = array ( $singlescope );
// Add cache entry dynamic
foreach ($scopes as $scope) {
if (!@in_array($attribute ,$this->attributes[$scope])) $add[$scope][] = $attribute;
}
if (count($add)!=0) $this->add_cache($add);
foreach ($scopes as $scope) {
if (isset($this->ldapcache[$scope])) {
$DNs = array_keys($this->ldapcache[$scope]);
foreach ($DNs as $dn) {
if (isset($this->ldapcache[$scope][$dn][$attribute]) && in_array($objectClass, $this->ldapcache[$scope][$dn]['objectClass'])) {
// return string if only attribute exists only once
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if (count($this->ldapcache[$scope][$dn][$attribute])==1) $return[$dn] = array($this->ldapcache[$scope][$dn][$attribute][0]);
else {
// else return array with all attributes
$return[$dn] = $this->ldapcache[$scope][$dn][$attribute];
}
}
}
}
}
return $return;
}
/* This functions returns the dn if a dn with $attribute=$value is found
* $values is the value $attribute is set to
* $scope is the scope where to search
*/
function in_cache($value, $attribute, $singlescope) {
$this->refresh_cache();
// Check input variables
$allowed_types = array ( 'user', 'group', 'host', 'domain', '*' );
if (!in_array($singlescope, $allowed_types)) trigger_error(sprintf(_('Invalid scope. Valid scopes are %s.'), implode(" ", $allowed_types)), E_USER_ERROR);
// Create list of all allowed attributes
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for ($i=0; $i<count($_SESSION['ldap']->objectClasses); $i++ ) {
if (strpos($_SESSION['ldap']->objectClasses[$i], 'MUST (')) {
$string_withtail = substr($_SESSION['ldap']->objectClasses[$i], strpos($_SESSION['ldap']->objectClasses[$i], 'MUST (')+6);
// Now we have a string with all must-attributes
$string = substr($string_withtail, 0, strpos($string_withtail, ')'));
$string = trim($string);
$allowed_attributes = array_merge($allowed_attributes, explode(" $ ", $string));
}
// create array with may-attributes
// Get startposition in string
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if (strpos($_SESSION['ldap']->objectClasses[$i], 'MAY (')) {
$string_withtail = substr($_SESSION['ldap']->objectClasses[$i], strpos($_SESSION['ldap']->objectClasses[$i], 'MAY (')+5);
// Now we have a string with all must-attributes
$string = substr($string_withtail, 0, strpos($string_withtail, ')'));
$string = trim($string);
$allowed_attributes = array_merge($allowed_attributes, explode(" $ ", $string));
}
}
$allowed_attributes = array_unique($allowed_attributes);
if (!in_array($attribute, $allowed_attributes)) trigger_error(_('Attribute not defined in LDAP.'), E_USER_WARNING);
// Everything seems to be OK, start processing data
$this->refresh_cache();
if ($singlescope == '*') $scopes = $allowed_types;
else $scopes = array ( $singlescope );
// Add cache entry dynamic
foreach ($scopes as $scope) {
if (!@in_array($attribute ,$this->attributes[$scope])) $add[$scope][] = $attribute;
}
if (count($add)!=0) $this->add_cache($add);
foreach ($scopes as $scope) {
if (isset($this->ldapcache[$scope])) {
$DNs = array_keys($this->ldapcache[$scope]);
foreach ($DNs as $dn) {
if (is_array($this->ldapcache[$scope][$dn][$attribute])) {
if (in_array($value, $this->ldapcache[$scope][$dn][$attribute])) {
// Return value if value was found
return $dn;
}
}
}
}
}
// Return false if value wasn't found
return false;
}
/* This functions refreshs the cache
*/
function refresh_cache($rebuild=false) {
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if ($this->time + $_SESSION['config']->get_cacheTimeoutSec() < time() || $rebuild) {
// unset old cache
unset ($this->ldapcache);
$scopes = array_keys($this->attributes);
foreach ($scopes as $scope) {
// Get Scope
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If ($scope != '*')
$suffix = call_user_func(array(&$_SESSION['config'], 'get_'.ucfirst($scope).'Suffix'));
else $suffix = '';
// Get Data from ldap
$search = $this->attributes[$scope];
$search[] = 'objectClass';
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$result = @ldap_search($_SESSION['ldap']->server(), $suffix, 'objectClass=*', $search, 0);
// Write search result in array
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$entry = @ldap_first_entry($_SESSION['ldap']->server(), $result);
while ($entry) {
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$dn = (ldap_get_dn($_SESSION['ldap']->server(), $entry));
$attr = ldap_get_attributes($_SESSION['ldap']->server(), $entry);
// unset every count entry
unset ($attr['count']);
$attributes = array_keys($attr);
foreach ($attributes as $attribute) {
unset ($attr[$attribute]['count']);
}
// unset double entries
for ($i=0; $i<count($attr); $i++) {
if (isset($attr[$i])) unset($attr[$i]);
}
// Write new cache entry
$addcache = $attr;
unset ($addcache['objectClass']);
foreach ($addcache as $temp)
foreach ($temp as $temp2)
$temp2 = utf8_decode($temp2);
if (count($addcache)!=0) $this->ldapcache[$scope][$dn] = $attr;
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$entry = ldap_next_entry($_SESSION['ldap']->server(), $entry);
}
}
$this->time = time();
}
}
/* This function update the cache when changes were
* made without refrehing the complete cache
*/
function update_cache($dn, $mode, $attributes=false) {
$allowed_modes = array ( 'add', 'remove', 'modify', 'delete_dn' );
$allowed_types = array ( 'user', 'group', 'host', '*' );
for ($i=0; $i<count($allowed_types); $i++) {
if ($allowed_types[$i]!='*') {
// *** fixme, where is get_DomainSuffix
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If ($scope != '*')
$suffix = call_user_func(array(&$_SESSION['config'], 'get_'.ucfirst($allowed_types[$i]).'Suffix'));
else $suffix = '';
if (substr($suffix, $dn)) $singlescope = $allowed_types[$i];
}
}
if (!in_array($singlescope, $allowed_types)) trigger_error(sprintf(_('Invalid scope. Valid scopes are %s.'), implode(" ", $allowed_types)), E_USER_ERROR);
if (!in_array($mode, $allowed_modes)) trigger_error(sprintf(_('Invalid mode. Valid modes are %s.'), implode(" ", $allowed_modes)), E_USER_ERROR);
// Everything seems to be OK, start processing data
// Get Scope
foreach ($allowed_types as $scope) {
if ($scope!='*') {
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$suffix = call_user_func(array(&$_SESSION['config'], 'get_'.ucfirst($scope).'Suffix'));
if (strpos($dn, $suffix)) $singlescope = $scope;
}
}
if (!isset($singlescope)) trigger_error(sprintf(_('Invalid dn: %s. DN not covered by any suffix.'), $dn), E_USER_WARN);
// Refresh Cache
$this->refresh_cache();
if (is_array($attributes))
switch ($mode) {
case 'add':
$list = array_keys($attributes);
for ($i=0; $i<count($list); $i++)
foreach ($attributes[$list[$i]] as $attribute)
$this->ldapcache[$singlescope][$dn][$list[$i]][] = $attributes[$list[$i]];
break;
case 'remove':
$list = array_keys($attributes);
for ($i=0; $i<count($list); $i++)
foreach ($attributes[$list[$i]] as $attribute)
if (isset($this->ldapcache[$singlescope][$dn][$list[$i]][$attributes[$list[$i]]]))
unset($this->ldapcache[$singlescope][$dn][$list[$i]][$attributes[$list[$i]]]);
break;
case 'modify':
$list = array_keys($attributes);
for ($i=0; $i<count($list); $i++) {
if (isset($this->ldapcache[$singlescope][$dn][$list[$i]])) unset($this->ldapcache[$singlescope][$dn][$list[$i]]);
foreach ($attributes[$list[$i]] as $attribute)
$this->ldapcache[$singlescope][$dn][$list[$i]][] = $attributes[$list[$i]];
}
}
else {
if ($mode=='delete_dn')
if (isset($this->ldapcache[$singlescope][$dn])) unset($this->ldapcache[$singlescope][$dn]);
}
}
/* This function will return the gidNumber to an existing groupname
* gidNumbers are taken from cache-array
*/
function getgid($groupname) {
$dn_groups = $_SESSION['cache']->get_cache('gidNumber', 'posixGroup', 'group');
$DNs = array_keys($dn_groups);
foreach ($DNs as $DN) {
if (strpos($DN, $groupname))
return $dn_groups[$DN][0];
}
}
/* This function will return an array with all groupnames
* found in ldap. Groupnames are taken from cache-array.
*/
function findgroups() {
$dn_groups = $_SESSION['cache']->get_cache('cn', 'posixGroup', 'group');
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if (is_array($dn_groups)) {
$DNs = array_keys($dn_groups);
foreach ($DNs as $DN)
$return[] = utf8_decode($dn_groups[$DN][0]);
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return $return;
}
return array();
}
/* This function will return the groupname to an existing gidNumber
* groupnames are taken from cache-array
*/
function getgrnam($gidNumber) {
$dn_groups = $_SESSION['cache']->get_cache('gidNumber', 'posixGroup', 'group');
if (is_array($dn_groups)) {
$DNs = array_keys($dn_groups);
foreach ($DNs as $DN) {
if ($dn_groups[$DN][0]==$gidNumber)
$return = utf8_decode(substr($DN, 3, strpos($DN, ',')-3));
}
return $return;
}
else return -1;
}
}
?>