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 /*! \brief Check if the given object (dn) is copyable
202 @param String The object dn
203 @param String The acl category (e.g. users)
204 @param String The acl class (e.g. user)
205 @return Boolean TRUE if the given object is copyable else FALSE
206 */
207 function is_copyable($dn, $object, $class)
208 {
209 return(preg_match("/r/",$this->has_complete_category_acls($dn, $object)));
210 }
213 /*! \brief Check if the given object (dn) is cutable
214 @param String The object dn
215 @param String The acl category (e.g. users)
216 @param String The acl class (e.g. user)
217 @return Boolean TRUE if the given object is cutable else FALSE
218 */
219 function is_cutable($dn, $object, $class)
220 {
221 $remove = preg_match("/d/",$this->get_permissions($dn,$object."/".$class));
222 $read = preg_match("/r/",$this->has_complete_category_acls($dn, $object));
223 return($remove && $read);
224 }
227 /*! \brief Checks if we are allowed to paste an object to the given destination ($dn)
228 @param String The destination dn
229 @param String The acl category (e.g. users)
230 @param String The acl class (e.g. user)
231 @return Boolean TRUE if we are allowed to paste an object.
232 */
233 function is_pasteable($dn, $object)
234 {
235 return(preg_match("/w/",$this->has_complete_category_acls($dn, $object)));
236 }
239 /*! \brief Checks if we are allowed to restore a snapshot for the given dn.
240 @param String The destination dn
241 @param String The acl category (e.g. users)
242 @return Boolean TRUE if we are allowed to restore a snapshot.
243 */
244 function allow_snapshot_restore($dn, $object)
245 {
246 if(!is_array($object)){
247 $object = array($object);
248 }
249 $r = $w = $c = TRUE;
250 foreach($object as $category){
251 $w &= preg_match("/w/",$this->has_complete_category_acls($dn, $category));
252 $c &= preg_match("/c/",$this->has_complete_category_acls($dn, $category));
253 $r &= preg_match("/r/",$this->has_complete_category_acls($dn, $category));
254 # print_a(array($category => array($r.$w.$c)));
255 }
256 return($r && $w );
257 }
260 /*! \brief Checks if we are allowed to create a snapshot of the given dn.
261 @param String The source dn
262 @param String The acl category (e.g. users)
263 @return Boolean TRUE if we are allowed to restore a snapshot.
264 */
265 function allow_snapshot_create($dn, $object)
266 {
267 if(!is_array($object)){
268 $object = array($object);
269 }
270 $r = $w = $c = TRUE;
271 foreach($object as $category){
272 $w &= preg_match("/w/",$this->has_complete_category_acls($dn, $category));
273 $c &= preg_match("/c/",$this->has_complete_category_acls($dn, $category));
274 $r &= preg_match("/r/",$this->has_complete_category_acls($dn, $category));
275 # print_a(array($category => array($r.$w.$c)));
276 }
277 return($r) ;
278 }
281 function get_permissions($dn, $object, $attribute= "", $skip_write= FALSE)
282 {
283 /* If we are forced to skip ACLs checks for the current user
284 then return all permissions.
285 */
286 if($this->ignore_acl_for_current_user()){
287 return("rwcdm");
288 }
290 /* Push cache answer? */
291 $ACL_CACHE = &session::get('ACL_CACHE');
292 if (isset($ACL_CACHE["$dn+$object+$attribute"])){
294 /* Remove write if needed */
295 if ($skip_write){
296 $ret = preg_replace('/w/', '', $ACL_CACHE["$dn+$object+$attribute"]);
297 }else{
298 $ret = $ACL_CACHE["$dn+$object+$attribute"];
299 }
300 return($ret);
301 }
303 /* Get ldap object, for later filter checks
304 */
305 $ldap = $this->config->get_ldap_link();
307 $acl= array("r" => "", "w" => "", "c" => "", "d" => "", "m" => "", "a" => "");
309 /* Build dn array */
310 $path= split(',', $dn);
311 $path= array_reverse($path);
313 /* Walk along the path to evaluate the acl */
314 $cpath= "";
315 foreach ($path as $element){
317 /* Clean potential ACLs for each level */
318 if(in_array($cpath,$this->config->departments)){
319 $acl= $this->cleanACL($acl);
320 }
322 if ($cpath == ""){
323 $cpath= $element;
324 } else {
325 $cpath= $element.','.$cpath;
326 }
328 if (isset($this->ACL[$cpath])){
330 /* Inspect this ACL, place the result into ACL */
331 foreach ($this->ACL[$cpath] as $subacl){
333 /* Reset? Just clean the ACL and turn over to the next one... */
334 if ($subacl['type'] == 'reset'){
335 $acl= $this->cleanACL($acl, TRUE);
336 continue;
337 }
339 if($subacl['type'] == "role") {
340 echo "role skipped";
341 continue;
342 }
344 /* With user filter */
345 if (isset($subacl['filter']) && !empty($subacl['filter'])){
346 $sdn = preg_replace("/^[^,]*+,/","",$dn);
347 $ldap->cd($sdn);
348 $ldap->ls($subacl['filter'],$sdn);
349 if(!$ldap->count()){
350 continue;
351 }else{
352 $found = FALSE;
353 while($attrs = $ldap->fetch()){
354 if($attrs['dn'] == $dn){
355 $found = TRUE;
356 break;
357 }
358 }
359 if(!$found){
360 continue;
361 }
362 }
363 }
365 /* Self ACLs?
366 */
367 if(isset($subacl['acl'][$object][0]) && preg_match("/s/",$subacl['acl'][$object][0]) && $dn != $this->dn){
368 continue;
369 }
371 /* If attribute is "", we want to know, if we've *any* permissions here...
372 Merge global class ACLs [0] with attributes specific ACLs [attribute].
373 */
374 if ($attribute == "" && isset($subacl['acl'][$object])){
375 foreach($subacl['acl'][$object] as $attr => $dummy){
376 $acl= $this->mergeACL($acl, $subacl['type'], $subacl['acl'][$object][$attr]);
377 }
378 continue;
379 }
381 /* Per attribute ACL? */
382 if (isset($subacl['acl'][$object][$attribute])){
383 $acl= $this->mergeACL($acl, $subacl['type'], $subacl['acl'][$object][$attribute]);
384 continue;
385 }
387 /* Per object ACL? */
388 if (isset($subacl['acl'][$object][0])){
389 $acl= $this->mergeACL($acl, $subacl['type'], $subacl['acl'][$object][0]);
390 continue;
391 }
393 /* Global ACL? */
394 if (isset($subacl['acl']['all'][0])){
395 $acl= $this->mergeACL($acl, $subacl['type'], $subacl['acl']['all'][0]);
396 continue;
397 }
398 }
399 }
400 }
402 /* If the requested ACL is for a container object, then alter
403 ACLs by applying cleanACL a last time.
404 */
405 if(in_array($dn,$this->config->departments)){
406 $acl = $this->cleanACL($acl);
407 }
409 /* Assemble string */
410 $ret= "";
411 foreach ($acl as $key => $value){
412 if ($value !== ""){
413 $ret.= $key;
414 }
415 }
417 $ACL_CACHE["$dn+$object+$attribute"]= $ret;
419 /* Remove write if needed */
420 if ($skip_write){
421 $ret= preg_replace('/w/', '', $ret);
422 }
423 return ($ret);
424 }
427 /* Extract all departments that are accessible (direct or 'on the way' to an
428 accessible department) */
429 function get_module_departments($module, $skip_self_acls = FALSE )
430 {
432 /* If we are forced to skip ACLs checks for the current user
433 then return all departments as valid.
434 */
435 if($this->ignore_acl_for_current_user()){
436 return(array_keys($this->config->idepartments));
437 }
439 /* Use cached results if possilbe */
440 $ACL_CACHE = session::get('ACL_CACHE');
441 if(isset($ACL_CACHE['MODULE_DEPARTMENTS'][serialize($module)])){
442 return($ACL_CACHE['MODULE_DEPARTMENTS'][serialize($module)]);
443 }
445 global $plist;
447 $objects= array();
448 $deps= array();
450 /* Extract all relevant objects for this module from plist */
451 foreach ($plist->info as $object => $info){
452 if (!isset($info['plCategory'])){
453 continue;
454 }
455 foreach ($info['plCategory'] as $idx => $data){
456 if (preg_match('/^[0-9]+$/', $idx)){
457 if ($data == $module){
458 $objects[$object]= $object;
459 }
460 } else {
461 if ($idx == $module){
462 $objects[$object]= $object;
463 }
464 }
465 }
466 }
468 /* Search for per object ACLs.
469 */
470 $this->config->get_departments();
471 $this->config->make_idepartments();
473 foreach($this->ACL as $dn => $infos){
474 foreach($infos as $info){
475 $found = FALSE;
476 foreach($info['acl'] as $cat => $data){
478 /* Skip self acls?
479 */
480 if($skip_self_acls && preg_match("//s",$data['0'])) continue;
482 if(is_array($module)){
483 foreach($module as $mod){
484 if(preg_match("/^".normalizePreg($mod)."/",$cat)){
485 $found =TRUE;
486 break;
487 }
488 }
489 }else{
490 if(preg_match("/^".normalizePreg($module)."/",$cat)){
491 $found =TRUE;
492 break;
493 }
494 }
495 }
497 if($found && !isset($this->config->idepartments[$dn])){
498 while(!isset($this->config->idepartments[$dn]) && preg_match("/,/",$dn)){
499 $dn = preg_replace("/^[^,]+,/","",$dn);
500 }
501 if(isset($this->config->idepartments[$dn])){
502 $deps[] = $dn;
503 }
504 }
505 }
506 }
508 /* For all gosaDepartments */
509 foreach ($this->config->departments as $dn){
510 if(!is_array($module)){
511 $module = array($module);
512 }
513 $acl = "";
514 foreach($module as $mod){
515 if(preg_match("/\//",$mod)){
516 $acl.= $this->get_permissions($dn,$mod);
517 }else{
518 $acl.= $this->get_category_permissions($dn,$mod);
519 }
520 }
521 if($acl !== "") $deps[] = $dn;
522 }
524 $ACL_CACHE = &session::get('ACL_CACHE');
525 $ACL_CACHE['MODULE_DEPARTMENTS'][serialize($module)] = $deps;
526 return ($deps);
527 }
530 function mergeACL($acl, $type, $newACL)
531 {
532 if (strpos($newACL, 'w') !== FALSE && strpos($newACL, 'r') === FALSE){
533 $newACL .= "r";
534 }
536 foreach(str_split($newACL) as $char){
538 /* Ignore invalid characters */
539 if (!preg_match('/[rwcdm]/', $char)){
540 continue;
541 }
543 /* Skip permanent and subtree entries */
544 if (preg_match('/[sp]/', $acl[$char])){
545 continue;
546 }
548 switch ($type){
549 case 'psub':
550 $acl[$char]= 'p';
551 break;
553 case 'sub':
554 $acl[$char]= 's';
555 break;
557 case 'one':
558 $acl[$char]= 1;
559 break;
561 case 'base':
562 if ($acl[$char] != 1){
563 $acl[$char]= 0;
564 }
565 break;
566 }
567 }
569 return ($acl);
570 }
573 function cleanACL($acl, $reset= FALSE)
574 {
575 foreach ($acl as &$value){
577 /* Reset removes everything but 'p' */
578 if ($reset && $value != 'p'){
579 $value= "";
580 continue;
581 }
583 /* Decrease tree level */
584 if (is_int($value)){
585 if ($value){
586 $value--;
587 } else {
588 $value= "";
589 }
590 }
591 }
593 return ($acl);
594 }
597 /* #FIXME This could be logical wrong or could be optimized in the future
598 Return combined acls for a given category.
599 All acls will be combined like boolean AND
600 As example ('rwcdm' + 'rcd' + 'wrm'= 'r')
602 Results will be cached in $this->result_cache.
603 $this->result_cache will be resetted if load_acls is called.
604 */
605 function has_complete_category_acls($dn,$category)
606 {
607 $acl = "rwcdm";
608 $types = "rwcdm";
610 if(!is_string($category)){
611 trigger_error("category must be string");
612 $acl = "";
613 }else{
614 if(!isset($this->result_cache['has_complete_category_acls'][$dn][$category])) {
615 if (isset($this->ocMapping[$category])){
616 foreach($this->ocMapping[$category] as $oc){
618 /* Skip objectClass '0' (e.g. users/0) get_permissions will ever return '' ?? */
619 if($oc == "0") continue;
620 $tmp = $this->get_permissions($dn, $category."/".$oc);
621 for($i = 0 ; $i < strlen($types); $i++) {
622 if(!preg_match("/".$types[$i]."/",$tmp)){
623 $acl = preg_replace("/".$types[$i]."/","",$acl);
624 }
625 }
626 }
627 }else{
628 trigger_error("Invalid type of category ".$category);
629 $acl = "";
630 }
631 $this->result_cache['has_complete_category_acls'][$dn][$category] = $acl;
632 }else{
633 $acl = $this->result_cache['has_complete_category_acls'][$dn][$category];
634 }
635 }
636 return($acl);
637 }
640 /*! \brief Returns TRUE if the current user is configured in IGNORE_ACL=".." in your gosa.conf
641 @param Return Boolean TRUE if we have to skip ACL checks else FALSE.
642 */
643 function ignore_acl_for_current_user()
644 {
645 return(isset($this->config->current['IGNORE_ACL']) && $this->config->current['IGNORE_ACL'] == $this->dn);
646 }
648 }
650 // vim:tabstop=2:expandtab:shiftwidth=2:filetype=php:syntax:ruler:
651 ?>