1 <?php
2 /*
3 * This code is part of GOsa (http://www.gosa-project.org)
4 * Copyright (C) 2003-2008 GONICUS GmbH
5 *
6 * ID: $$Id$$
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
23 class userinfo
24 {
25 var $dn;
26 var $ip;
27 var $username;
28 var $cn;
29 var $uid;
30 var $gidNumber= -1;
31 var $language= "";
32 var $config;
33 var $gosaUnitTag= "";
34 var $subtreeACL= array();
35 var $ACL= array();
36 var $ocMapping= array();
37 var $groups= array();
38 var $result_cache =array();
40 /* get acl's an put them into the userinfo object
41 attr subtreeACL (userdn:components, userdn:component1#sub1#sub2,component2,...) */
42 function userinfo(&$config, $userdn){
43 $this->config= &$config;
44 $ldap= $this->config->get_ldap_link();
45 $ldap->cat($userdn,array('sn', 'givenName', 'uid', 'gidNumber', 'preferredLanguage', 'gosaUnitTag'));
46 $attrs= $ldap->fetch();
48 if (isset($attrs['givenName'][0]) && isset($attrs['sn'][0])){
49 $this->cn= $attrs['givenName'][0]." ".$attrs['sn'][0];
50 } else {
51 $this->cn= $attrs['uid'][0];
52 }
53 if (isset($attrs['gidNumber'][0])){
54 $this->gidNumber= $attrs['gidNumber'][0];
55 }
57 /* Assign user language */
58 if (isset($attrs['preferredLanguage'][0])){
59 $this->language= $attrs['preferredLanguage'][0];
60 }
62 if (isset($attrs['gosaUnitTag'][0])){
63 $this->gosaUnitTag= $attrs['gosaUnitTag'][0];
64 }
66 $this->dn= $userdn;
67 $this->uid= $attrs['uid'][0];
68 $this->ip= $_SERVER['REMOTE_ADDR'];
70 /* Initialize ACL_CACHE */
71 session::set('ACL_CACHE',array());
72 $this->reset_acl_cache();
73 }
76 public function reset_acl_cache()
77 {
78 /* Initialize ACL_CACHE */
79 session::set('ACL_CACHE',array());
80 }
82 function loadACL()
83 {
84 $this->ACL= array();
85 $this->groups= array();
86 $this->result_cache =array();
87 $this->reset_acl_cache();
88 $ldap= $this->config->get_ldap_link();
89 $ldap->cd($this->config->current['BASE']);
91 /* Get member groups... */
92 $ldap->search("(&(objectClass=posixGroup)(memberUid=".$this->uid."))", array('dn'));
93 while ($attrs= $ldap->fetch()){
94 $this->groups[$attrs['dn']]= $attrs['dn'];
95 }
97 /* Crawl through ACLs and move relevant to the tree */
98 $ldap->search("(objectClass=gosaACL)", array('dn', 'gosaAclEntry'));
99 $aclp= array();
100 $aclc= array();
101 while ($attrs= $ldap->fetch()){
103 /* Insert links in ACL array */
104 $aclp[$attrs['dn']]= substr_count($attrs['dn'], ',');
105 $aclc[$attrs['dn']]= array();
106 $ol= array();
107 for($i= 0; $i<$attrs['gosaAclEntry']['count']; $i++){
108 $ol= array_merge($ol, @acl::explodeAcl($attrs['gosaAclEntry'][$i]));
109 }
110 $aclc[$attrs['dn']]= $ol;
111 }
113 /* Resolve roles here.
114 */
115 foreach($aclc as $dn => $data){
116 foreach($data as $prio => $aclc_value) {
117 if($aclc_value['type'] == "role"){
119 unset($aclc[$dn][$prio]);
121 $ldap->cat($aclc_value['acl'],array("gosaAclTemplate"));
122 $attrs = $ldap->fetch();
124 if(isset($attrs['gosaAclTemplate'])){
125 for($i= 0; $i<$attrs['gosaAclTemplate']['count']; $i++){
126 $tmp = @acl::explodeAcl($attrs['gosaAclTemplate'][$i]);
128 foreach($tmp as $new_acl){
129 $new_acl['members'] = $aclc_value['members'];
130 $aclc[$dn][] =$new_acl;
131 }
132 }
133 }
134 }
135 }
136 }
138 /* ACL's read, sort for tree depth */
139 asort($aclp);
141 /* Sort in tree order */
142 foreach ($aclp as $dn => $acl){
143 /* Check if we need to keep this ACL */
144 foreach($aclc[$dn] as $idx => $type){
145 $interresting= FALSE;
147 /* No members? This is good for all users... */
148 if (!count($type['members'])){
149 $interresting= TRUE;
150 } else {
152 /* Inspect members... */
153 foreach ($type['members'] as $grp => $grpdsc){
154 /* Some group inside the members that is relevant for us? */
155 if (in_array_ics(preg_replace('/^G:/', '', $grp), $this->groups)){
156 $interresting= TRUE;
157 }
159 /* User inside the members? */
160 if (preg_replace('/^U:/', '', $grp) == $this->dn){
161 $interresting= TRUE;
162 }
163 }
164 }
166 if ($interresting){
167 if (!isset($this->ACL[$dn])){
168 $this->ACL[$dn]= array();
169 }
170 $this->ACL[$dn][$idx]= $type;
171 }
172 }
174 }
175 }
178 function get_category_permissions($dn, $category)
179 {
180 /* If we are forced to skip ACLs checks for the current user
181 then return all permissions.
182 */
183 if($this->ignore_acl_for_current_user()){
184 return("rwcdm");
185 }
187 /* Get list of objectClasses and get the permissions for it */
188 $acl= "";
189 if (isset($this->ocMapping[$category])){
190 foreach($this->ocMapping[$category] as $oc){
191 $acl.= $this->get_permissions($dn, $category."/".$oc);
192 }
193 }else{
194 trigger_error("ACL request for an invalid category (".$category.").");
195 }
197 return ($acl);
198 }
201 function is_copyable($dn, $object, $class)
202 {
203 return(preg_match("/r/",$this->has_complete_category_acls($dn, $object)));
204 }
206 function is_cutable($dn, $object, $class)
207 {
208 $remove = preg_match("/d/",$this->get_permissions($dn,$object."/".$class));
209 $read = preg_match("/r/",$this->has_complete_category_acls($dn, $object));
210 return($remove && $read);
211 }
213 function is_pasteable($dn, $object, $class)
214 {
215 return(preg_match("/w/",$this->has_complete_category_acls($dn, $object)));
216 }
218 function get_permissions($dn, $object, $attribute= "", $skip_write= FALSE)
219 {
220 /* If we are forced to skip ACLs checks for the current user
221 then return all permissions.
222 */
223 if($this->ignore_acl_for_current_user()){
224 return("rwcdm");
225 }
227 /* Push cache answer? */
228 $ACL_CACHE = &session::get('ACL_CACHE');
229 if (isset($ACL_CACHE["$dn+$object+$attribute"])){
231 /* Remove write if needed */
232 if ($skip_write){
233 $ret = preg_replace('/w/', '', $ACL_CACHE["$dn+$object+$attribute"]);
234 }else{
235 $ret = $ACL_CACHE["$dn+$object+$attribute"];
236 }
237 return($ret);
238 }
240 /* Get ldap object, for later filter checks
241 */
242 $ldap = $this->config->get_ldap_link();
244 $acl= array("r" => "", "w" => "", "c" => "", "d" => "", "m" => "", "a" => "");
246 /* Build dn array */
247 $path= split(',', $dn);
248 $path= array_reverse($path);
250 /* Walk along the path to evaluate the acl */
251 $cpath= "";
252 foreach ($path as $element){
254 /* Clean potential ACLs for each level */
255 $acl= $this->cleanACL($acl);
257 if ($cpath == ""){
258 $cpath= $element;
259 } else {
260 $cpath= $element.','.$cpath;
261 }
262 if (isset($this->ACL[$cpath])){
264 /* Inspect this ACL, place the result into ACL */
265 foreach ($this->ACL[$cpath] as $subacl){
267 /* Reset? Just clean the ACL and turn over to the next one... */
268 if ($subacl['type'] == 'reset'){
269 $acl= $this->cleanACL($acl, TRUE);
270 continue;
271 }
273 if($subacl['type'] == "role") {
274 echo "role skipped";
275 continue;
276 }
278 /* With user filter */
279 if (isset($subacl['filter']) && !empty($subacl['filter'])){
280 $sdn = preg_replace("/^[^,]*+,/","",$dn);
281 $ldap->cd($sdn);
282 $ldap->ls($subacl['filter'],$sdn);
283 if(!$ldap->count()){
284 continue;
285 }else{
286 $found = FALSE;
287 while($attrs = $ldap->fetch()){
288 if($attrs['dn'] == $dn){
289 $found = TRUE;
290 break;
291 }
292 }
293 if(!$found){
294 continue;
295 }
296 }
297 }
299 /* Per attribute ACL? */
300 if (isset($subacl['acl'][$object][$attribute])){
301 $acl= $this->mergeACL($acl, $subacl['type'], $subacl['acl'][$object][$attribute]);
302 continue;
303 }
305 /* Per object ACL? */
306 if (isset($subacl['acl'][$object][0])){
307 $acl= $this->mergeACL($acl, $subacl['type'], $subacl['acl'][$object][0]);
308 continue;
309 }
311 /* Global ACL? */
312 if (isset($subacl['acl']['all'][0])){
313 $acl= $this->mergeACL($acl, $subacl['type'], $subacl['acl']['all'][0]);
314 continue;
315 }
317 /* If attribute is "", we want to know, if we've *any* permissions here... */
318 if ($attribute == "" && isset($subacl['acl'][$object])){
319 foreach($subacl['acl'][$object] as $attr => $dummy){
320 $acl= $this->mergeACL($acl, $subacl['type'], $subacl['acl'][$object][$attr]);
321 }
322 continue;
323 }
325 }
326 }
327 }
329 /* Assemble string */
330 $ret= "";
331 foreach ($acl as $key => $value){
332 if ($value !== ""){
333 $ret.= $key;
334 }
335 }
337 $ACL_CACHE["$dn+$object+$attribute"]= $ret;
339 /* Remove write if needed */
340 if ($skip_write){
341 $ret= preg_replace('/w/', '', $ret);
342 }
343 return ($ret);
344 }
347 /* Extract all departments that are accessible (direct or 'on the way' to an
348 accessible department) */
349 function get_module_departments($module)
350 {
352 /* If we are forced to skip ACLs checks for the current user
353 then return all departments as valid.
354 */
355 if($this->ignore_acl_for_current_user()){
356 return(array_keys($this->config->idepartments));
357 }
359 /* Use cached results if possilbe */
360 $ACL_CACHE = session::get('ACL_CACHE');
361 if(isset($ACL_CACHE['MODULE_DEPARTMENTS'][serialize($module)])){
362 return($ACL_CACHE['MODULE_DEPARTMENTS'][serialize($module)]);
363 }
365 global $plist;
367 $objects= array();
368 $deps= array();
370 /* Extract all relevant objects for this module from plist */
371 foreach ($plist->info as $object => $info){
372 if (!isset($info['plCategory'])){
373 continue;
374 }
375 foreach ($info['plCategory'] as $idx => $data){
376 if (preg_match('/^[0-9]+$/', $idx)){
377 if ($data == $module){
378 $objects[$object]= $object;
379 }
380 } else {
381 if ($idx == $module){
382 $objects[$object]= $object;
383 }
384 }
385 }
386 }
388 /* For all gosaDepartments */
389 foreach ($this->config->departments as $dn){
390 $acl= array("r" => "", "w" => "", "c" => "", "d" => "", "m" => "", "a" => "");
392 /* Build dn array */
393 $path= split(',', $dn);
394 $path= array_reverse($path);
396 /* Walk along the path to evaluate the acl */
397 $cpath= "";
398 foreach ($path as $element){
400 /* Clean potential ACLs for each level */
401 $acl= $this->cleanACL($acl);
403 if ($cpath == ""){
404 $cpath= $element;
405 } else {
406 $cpath= $element.','.$cpath;
407 }
408 if (isset($this->ACL[$cpath])){
410 /* Inspect this ACL, place the result into ACL */
411 foreach ($this->ACL[$cpath] as $subacl){
413 /* Reset? Just clean the ACL and turn over to the next one... */
414 if ($subacl['type'] == 'reset'){
415 $acl= $this->cleanACL($acl, TRUE);
416 continue;
417 }
419 if($subacl['type'] == 'role'){
420 echo "role skipped";
421 continue;
422 }
424 /* Per object ACL? */
425 foreach ($objects as $object){
426 if (isset($subacl['acl']["$module/$object"])){
427 foreach($subacl['acl']["$module/$object"] as $attribute => $dcl){
428 $acl= $this->mergeACL($acl, $subacl['type'], $subacl['acl']["$module/$object"][$attribute]);
429 }
430 }
431 }
433 /* Global ACL? */
434 if (isset($subacl['acl']["$module/all"][0])){
435 $acl= $this->mergeACL($acl, $subacl['type'], $subacl['acl']["$module/all"][0]);
436 continue;
437 }
439 /* Global ACL? */
440 if (isset($subacl['acl']["all"][0])){
441 $acl= $this->mergeACL($acl, $subacl['type'], $subacl['acl']["all"][0]);
442 continue;
443 }
444 }
445 }
446 }
448 /* Add department, if we have (some) permissions for the required module */
449 foreach ($acl as $val){
450 if ($val != ""){
451 $deps[]= $dn;
452 break;
453 }
454 }
455 }
457 $ACL_CACHE = &session::get('ACL_CACHE');
458 $ACL_CACHE['MODULE_DEPARTMENTS'][serialize($module)] = $deps;
459 return ($deps);
460 }
463 function mergeACL($acl, $type, $newACL)
464 {
465 if (strpos($newACL, 'w') !== FALSE && strpos($newACL, 'r') === FALSE){
466 $newACL .= "r";
467 }
469 foreach(str_split($newACL) as $char){
471 /* Ignore invalid characters */
472 if (!preg_match('/[rwcdm]/', $char)){
473 continue;
474 }
476 /* Skip permanent and subtree entries */
477 if (preg_match('/[sp]/', $acl[$char])){
478 continue;
479 }
481 switch ($type){
482 case 'psub':
483 $acl[$char]= 'p';
484 break;
486 case 'sub':
487 $acl[$char]= 's';
488 break;
490 case 'one':
491 $acl[$char]= 1;
492 break;
494 case 'base':
495 if ($acl[$char] != 1){
496 $acl[$char]= 0;
497 }
498 break;
499 }
500 }
502 return ($acl);
503 }
506 function cleanACL($acl, $reset= FALSE)
507 {
508 foreach ($acl as &$value){
510 /* Reset removes everything but 'p' */
511 if ($reset && $value != 'p'){
512 $value= "";
513 continue;
514 }
516 /* Decrease tree level */
517 if (is_int($value)){
518 if ($value){
519 $value--;
520 } else {
521 $value= "";
522 }
523 }
524 }
526 return ($acl);
527 }
530 /* #FIXME This could be logical wrong or could be optimized in the future
531 Return combined acls for a given category.
532 All acls will be combined like boolean AND
533 As example ('rwcdm' + 'rcd' + 'wrm'= 'r')
535 Results will be cached in $this->result_cache.
536 $this->result_cache will be resetted if load_acls is called.
537 */
538 function has_complete_category_acls($dn,$category)
539 {
540 $acl = "rwcdm";
541 $types = "rwcdm";
543 if(!is_string($category)){
544 trigger_error("category must be string");
545 $acl = "";
546 }else{
547 if(!isset($this->result_cache['has_complete_category_acls'][$dn][$category])) {
548 if (isset($this->ocMapping[$category])){
549 foreach($this->ocMapping[$category] as $oc){
551 /* Skip objectClass '0' (e.g. users/0) get_permissions will ever return '' ?? */
552 if($oc == "0") continue;
553 $tmp = $this->get_permissions($dn, $category."/".$oc);
554 for($i = 0 ; $i < strlen($types); $i++) {
555 if(!preg_match("/".$types[$i]."/",$tmp)){
556 $acl = preg_replace("/".$types[$i]."/","",$acl);
557 }
558 }
559 }
560 }else{
561 trigger_error("Invalid type of category ".$category);
562 $acl = "";
563 }
564 $this->result_cache['has_complete_category_acls'][$dn][$category] = $acl;
565 }else{
566 $acl = $this->result_cache['has_complete_category_acls'][$dn][$category];
567 }
568 }
569 return($acl);
570 }
573 /*! \brief Returns TRUE if the current user is configured in IGNORE_ACL=".." in your gosa.conf
574 @param Return Boolean TRUE if we have to skip ACL checks else FALSE.
575 */
576 function ignore_acl_for_current_user()
577 {
578 return(isset($this->config->current['IGNORE_ACL']) && $this->config->current['IGNORE_ACL'] == $this->dn);
579 }
581 }
583 // vim:tabstop=2:expandtab:shiftwidth=2:filetype=php:syntax:ruler:
584 ?>