4 Copyright 2004,2007 $ThePhpWikiProgrammingTeam
5 Copyright 2009 Marc-Etienne Vargenau, Alcatel-Lucent
7 This file is part of PhpWiki.
9 PhpWiki is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 PhpWiki is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with PhpWiki; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 Permissions per page and action based on current user,
26 ownership and group membership implemented with ACL's (Access Control Lists),
27 opposed to the simplier unix-like ugo:rwx system.
28 The previous system was only based on action and current user. (lib/main.php)
30 Permissions may be inherited from its parent pages, a optional the
31 optional master page ("."), and predefined default permissions, if "."
33 Pagenames starting with "." have special default permissions.
34 For Authentication see WikiUserNew.php, WikiGroup.php and main.php
35 Page Permissions are in PhpWiki since v1.3.9 and enabled since v1.4.0
37 This file might replace the following functions from main.php:
38 Request::_notAuthorized($require_level)
39 display the denied message and optionally a login form
40 to gain higher privileges
41 Request::getActionDescription($action)
42 helper to localize the _notAuthorized message per action,
44 Request::getDisallowedActionDescription($action)
45 helper to localize the _notAuthorized message per action,
47 Request::requiredAuthority($action)
48 returns the needed user level
49 has a hook for plugins on POST
50 Request::requiredAuthorityForAction($action)
51 just returns the level per action, will be replaced with the
54 The defined main.php actions map to simplier access types:
57 create => edit or create
61 list in PageList => list
64 /* Symbolic special ACL groups. Untranslated to be stored in page metadata*/
65 define('ACL_EVERY', '_EVERY');
66 define('ACL_ANONYMOUS', '_ANONYMOUS');
67 define('ACL_BOGOUSER', '_BOGOUSER');
68 define('ACL_HASHOMEPAGE', '_HASHOMEPAGE');
69 define('ACL_SIGNED', '_SIGNED');
70 define('ACL_AUTHENTICATED','_AUTHENTICATED');
71 define('ACL_ADMIN', '_ADMIN');
72 define('ACL_OWNER', '_OWNER');
73 define('ACL_CREATOR', '_CREATOR');
75 // Return an page permissions array for this page.
76 // To provide ui helpers to view and change page permissions:
77 // <tr><th>Group</th><th>Access</th><th>Allow or Forbid</th></tr>
78 // <tr><td>$group</td><td>_($access)</td><td> [ ] </td></tr>
79 function pagePermissions($pagename) {
81 $page = $request->getPage($pagename);
82 // Page not found (new page); returned inherited permissions, to be displayed in gray
83 if (! $page->exists() ) {
84 if ($pagename == '.') // stop recursion
85 return array('default', new PagePermission());
87 return array('inherited', pagePermissions(getParentPage($pagename)));
89 } elseif ($perm = getPagePermissions($page)) {
90 return array('page', $perm);
91 // or no permissions defined; returned inherited permissions, to be displayed in gray
92 } elseif ($pagename == '.') { // stop recursion in pathological case.
93 // "." defined, without any acl
94 return array('default', new PagePermission());
96 return array('inherited', pagePermissions(getParentPage($pagename)));
100 function pagePermissionsSimpleFormat($perm_tree, $owner, $group=false) {
101 list($type,$perm) = pagePermissionsAcl($perm_tree[0], $perm_tree);
103 $type = $perm_tree[0];
104 $perm = pagePermissionsAcl($perm_tree);
105 if (is_object($perm_tree[1]))
106 $perm = $perm_tree[1];
107 elseif (is_array($perm_tree[1])) {
108 $perm_tree = pagePermissionsSimpleFormat($perm_tree[1],$owner,$group);
109 if (isa($perm_tree[1],'pagepermission'))
110 $perm = $perm_tree[1];
111 elseif (isa($perm_tree,'htmlelement'))
116 return HTML::tt(HTML::strong($perm->asRwxString($owner, $group)));
117 elseif ($type == 'default')
118 return HTML::tt($perm->asRwxString($owner, $group));
119 elseif ($type == 'inherited') {
120 return HTML::tt(array('class'=>'inherited', 'style'=>'color:#aaa;'),
121 $perm->asRwxString($owner, $group));
125 function pagePermissionsAcl($type,$perm_tree) {
126 $perm = $perm_tree[1];
127 while (!is_object($perm)) {
128 $perm_tree = pagePermissionsAcl($type, $perm);
129 $perm = $perm_tree[1];
131 return array($type,$perm);
136 function pagePermissionsAclFormat($perm_tree, $editable=false) {
137 list($type,$perm) = pagePermissionsAcl($perm_tree[0], $perm_tree);
139 return $perm->asEditableTable($type);
141 return $perm->asTable($type);
145 * Check the permissions for the current action.
146 * Walk down the inheritance tree. Collect all permissions until
147 * the minimum required level is gained, which is not
148 * overruled by more specific forbid rules.
149 * Todo: cache result per access and page in session?
151 function requiredAuthorityForPage ($action) {
153 $auth = _requiredAuthorityForPagename(action2access($action),
154 $request->getArg('pagename'));
155 assert($auth !== -1);
157 return $request->_user->_level;
159 return WIKIAUTH_UNOBTAINABLE;
162 // Translate action or plugin to the simplier access types:
163 function action2access ($action) {
177 if (INSECURE_ACTIONS_LOCALHOST_ONLY and is_localhost())
182 // performance and security relevant
189 // invent a new access-perm massedit? or switch back to change, or keep it at edit?
190 case _("PhpWikiAdministration")."/"._("Rename"):
191 case _("PhpWikiAdministration")."/"._("Replace"):
198 $page = $request->getPage();
199 if (!$page->exists())
206 // probably create/edit but we cannot check all page permissions, can we?
216 //Todo: Plugins should be able to override its access type
217 if (isWikiWord($action))
225 // Recursive helper to do the real work.
226 // Using a simple perm cache for page-access pairs.
227 // Maybe page-(current+edit+change?)action pairs will help
228 function _requiredAuthorityForPagename($access, $pagename) {
229 static $permcache = array();
231 if (array_key_exists($pagename, $permcache)
232 and array_key_exists($access, $permcache[$pagename]))
233 return $permcache[$pagename][$access];
236 $page = $request->getPage($pagename);
237 if (defined('GFORGE') and GFORGE) {
238 if ($pagename != '.' && isset($request->_user->_is_external) && $request->_user->_is_external && ! $page->get('external')) {
239 $permcache[$pagename][$access] = 0;
243 // Page not found; check against default permissions
244 if (! $page->exists() ) {
245 $perm = new PagePermission();
246 $result = ($perm->isAuthorized($access, $request->_user) === true);
247 $permcache[$pagename][$access] = $result;
250 // no ACL defined; check for special dotfile or walk down
251 if (! ($perm = getPagePermissions($page))) {
252 if ($pagename == '.') {
253 $perm = new PagePermission();
254 if ($perm->isAuthorized('change', $request->_user)) {
255 // warn the user to set ACL of ".", if he has permissions to do so.
256 trigger_error(". (dotpage == rootpage for inheriting pageperm ACLs) exists without any ACL!\n".
257 "Please do ?action=setacl&pagename=.", E_USER_WARNING);
259 $result = ($perm->isAuthorized($access, $request->_user) === true);
260 $permcache[$pagename][$access] = $result;
262 } elseif ($pagename[0] == '.') {
263 $perm = new PagePermission(PagePermission::dotPerms());
264 $result = ($perm->isAuthorized($access, $request->_user) === true);
265 $permcache[$pagename][$access] = $result;
268 return _requiredAuthorityForPagename($access, getParentPage($pagename));
270 // ACL defined; check if isAuthorized returns true or false or undecided
271 $authorized = $perm->isAuthorized($access, $request->_user);
272 if ($authorized !== -1) { // interestingly true is also -1
273 $permcache[$pagename][$access] = $authorized;
275 } elseif ($pagename == '.') {
278 return _requiredAuthorityForPagename($access, getParentPage($pagename));
283 * @param string $pagename page from which the parent page is searched.
284 * @return string parent pagename or the (possibly pseudo) dot-pagename.
286 function getParentPage($pagename) {
287 if (isSubPage($pagename)) {
288 return subPageSlice($pagename, 0);
294 // Read the ACL from the page
295 // Done: Not existing pages should NOT be queried.
296 // Check the parent page instead and don't take the default ACL's
297 function getPagePermissions ($page) {
298 if ($hash = $page->get('perm')) // hash => object
299 return new PagePermission(unserialize($hash));
304 // Store the ACL in the page
305 function setPagePermissions ($page,$perm) {
309 function getAccessDescription($access) {
310 static $accessDescriptions;
311 if (! $accessDescriptions) {
312 $accessDescriptions = array(
313 'list' => _("List this page and all subpages"),
314 'view' => _("View this page and all subpages"),
315 'edit' => _("Edit this page and all subpages"),
316 'create' => _("Create a new (sub)page"),
317 'dump' => _("Download page contents"),
318 'change' => _("Change page attributes"),
319 'remove' => _("Remove this page"),
320 'purge' => _("Purge this page"),
323 if (in_array($access, array_keys($accessDescriptions)))
324 return $accessDescriptions[$access];
330 function array_diff_assoc_recursive($array1, $array2) {
331 foreach ($array1 as $key => $value) {
332 if (is_array($value)) {
333 if (!is_array($array2[$key])) {
334 $difference[$key] = $value;
336 $new_diff = array_diff_assoc_recursive($value, $array2[$key]);
337 if ($new_diff != false) {
338 $difference[$key] = $new_diff;
341 } elseif(!isset($array2[$key]) || $array2[$key] != $value) {
342 $difference[$key] = $value;
345 return !isset($difference) ? 0 : $difference;
349 * The ACL object per page. It is stored in a page, but can also
350 * be merged with ACL's from other pages or taken from the master (pseudo) dot-file.
352 * A hash of "access" => "requires" pairs.
353 * "access" is a shortcut for common actions, which map to main.php actions
354 * "requires" required username or groupname or any special group => true or false
356 * Define any special rules here, like don't list dot-pages.
358 class PagePermission {
361 function PagePermission($hash = array()) {
362 $this->_group = &$GLOBALS['request']->getGroup();
363 if (is_array($hash) and !empty($hash)) {
364 $accessTypes = $this->accessTypes();
365 foreach ($hash as $access => $requires) {
366 if (in_array($access, $accessTypes))
367 $this->perm[$access] = $requires;
369 trigger_error(sprintf(_("Unsupported ACL access type %s ignored."), $access),
373 // set default permissions, the so called dot-file acl's
374 $this->perm = $this->defaultPerms();
380 * The workhorse to check the user against the current ACL pairs.
381 * Must translate the various special groups to the actual users settings
382 * (userid, group membership).
384 function isAuthorized($access, $user) {
386 if (!empty($this->perm{$access})) {
387 foreach ($this->perm[$access] as $group => $bool) {
388 if ($this->isMember($user, $group)) {
390 } elseif ($allow == -1) { // not a member and undecided: check other groups
395 return $allow; // undecided
399 * Translate the various special groups to the actual users settings
400 * (userid, group membership).
402 function isMember($user, $group) {
404 if ($group === ACL_EVERY) return true;
405 if (!isset($this->_group)) $member =& $request->getGroup();
406 else $member =& $this->_group;
407 //$user = & $request->_user;
408 if ($group === ACL_ADMIN) // WIKI_ADMIN or member of _("Administrators")
409 return $user->isAdmin() or
410 ($user->isAuthenticated() and
411 $member->isMember(GROUP_ADMIN));
412 if ($group === ACL_ANONYMOUS)
413 return ! $user->isSignedIn();
414 if ($group === ACL_BOGOUSER)
416 return isa($user,'_BogoUser') or
417 (isWikiWord($user->_userid) and $user->_level >= WIKIAUTH_BOGO);
418 else return isWikiWord($user->UserName());
419 if ($group === ACL_HASHOMEPAGE)
420 return $user->hasHomePage();
421 if ($group === ACL_SIGNED)
422 return $user->isSignedIn();
423 if ($group === ACL_AUTHENTICATED)
424 return $user->isAuthenticated();
425 if ($group === ACL_OWNER) {
426 if (!$user->isAuthenticated()) return false;
427 $page = $request->getPage();
428 $owner = $page->getOwner();
429 return ($owner === $user->UserName()
430 or $member->isMember($owner));
432 if ($group === ACL_CREATOR) {
433 if (!$user->isAuthenticated()) return false;
434 $page = $request->getPage();
435 $creator = $page->getCreator();
436 return ($creator === $user->UserName()
437 or $member->isMember($creator));
439 /* Or named groups or usernames.
440 Note: We don't seperate groups and users here.
441 Users overrides groups with the same name.
443 return $user->UserName() === $group or
444 $member->isMember($group);
448 * returns hash of default permissions.
449 * check if the page '.' exists and returns this instead.
451 function defaultPerms() {
452 //Todo: check for the existance of '.' and take this instead.
453 //Todo: honor more config.ini auth settings here
454 $perm = array('view' => array(ACL_EVERY => true),
455 'edit' => array(ACL_EVERY => true),
456 'create' => array(ACL_EVERY => true),
457 'list' => array(ACL_EVERY => true),
458 'remove' => array(ACL_ADMIN => true,
460 'purge' => array(ACL_ADMIN => true,
462 'dump' => array(ACL_ADMIN => true,
464 'change' => array(ACL_ADMIN => true,
467 $perm['dump'] = array(ACL_ADMIN => true,
469 elseif (INSECURE_ACTIONS_LOCALHOST_ONLY) {
471 $perm['dump'] = array(ACL_EVERY => true);
473 $perm['dump'] = array(ACL_ADMIN => true);
476 $perm['dump'] = array(ACL_EVERY => true);
477 if (defined('REQUIRE_SIGNIN_BEFORE_EDIT') && REQUIRE_SIGNIN_BEFORE_EDIT)
478 $perm['edit'] = array(ACL_SIGNED => true);
480 if (!ALLOW_ANON_USER) {
481 if (!ALLOW_USER_PASSWORDS)
482 $perm['view'] = array(ACL_SIGNED => true);
484 $perm['view'] = array(ACL_AUTHENTICATED => true);
485 $perm['view'][ACL_BOGOUSER] = ALLOW_BOGO_LOGIN ? true : false;
488 if (!ALLOW_ANON_EDIT) {
489 if (!ALLOW_USER_PASSWORDS)
490 $perm['edit'] = array(ACL_SIGNED => true);
492 $perm['edit'] = array(ACL_AUTHENTICATED => true);
493 $perm['edit'][ACL_BOGOUSER] = ALLOW_BOGO_LOGIN ? true : false;
494 $perm['create'] = $perm['edit'];
500 * FIXME: check valid groups and access
503 foreach ($this->perm as $access => $groups) {
504 foreach ($groups as $group => $bool) {
505 $this->perm[$access][$group] = (boolean) $bool;
511 * do a recursive comparison
513 function equal($otherperm) {
514 // The equal function seems to be unable to detect removed perm.
515 // Use case is when a rule is removed.
516 return (print_r($this->perm, true) === print_r($otherperm, true));
518 // $diff = array_diff_assoc_recursive($this->perm, $otherperm);
519 // return empty($diff);
523 * returns list of all supported access types.
525 function accessTypes() {
526 return array_keys(PagePermission::defaultPerms());
530 * special permissions for dot-files, beginning with '.'
531 * maybe also for '_' files?
533 function dotPerms() {
534 $def = array(ACL_ADMIN => true,
537 foreach (PagePermission::accessTypes() as $access) {
538 $perm[$access] = $def;
544 * dead code. not needed inside the object. see getPagePermissions($page)
546 function retrieve($page) {
547 $hash = $page->get('perm');
548 if ($hash) // hash => object
549 $perm = new PagePermission(unserialize($hash));
551 $perm = new PagePermission();
556 function store($page) {
559 return $page->set('perm',serialize($this->perm));
562 function groupName ($group) {
563 if ($group[0] == '_') return constant("GROUP".$group);
567 /* type: page, default, inherited */
568 function asTable($type) {
569 $table = HTML::table();
570 foreach ($this->perm as $access => $perms) {
571 $td = HTML::table(array('class' => 'cal'));
572 foreach ($perms as $group => $bool) {
573 $td->pushContent(HTML::tr(HTML::td(array('align'=>'right'),$group),
574 HTML::td($bool ? '[X]' : '[ ]')));
576 $table->pushContent(HTML::tr(array('valign' => 'top'),
577 HTML::td($access),HTML::td($td)));
579 if ($type == 'default')
580 $table->setAttr('style','border: dotted thin black; background-color:#eee;');
581 elseif ($type == 'inherited')
582 $table->setAttr('style','border: dotted thin black; background-color:#ddd;');
583 elseif ($type == 'page')
584 $table->setAttr('style','border: solid thin black; font-weight: bold;');
588 /* type: page, default, inherited */
589 function asEditableTable($type) {
591 if (!isset($this->_group)) {
592 $this->_group =& $GLOBALS['request']->getGroup();
594 $table = HTML::table();
595 $table->pushContent(HTML::tr(
596 HTML::th(array('align' => 'left'),
598 HTML::th(array('align'=>'right'),
600 HTML::th(_("Grant")),
601 HTML::th(_("Del/+")),
602 HTML::th(_("Description"))));
604 $allGroups = $this->_group->_specialGroups();
605 foreach ($this->_group->getAllGroupsIn() as $group) {
606 if (!in_array($group,$this->_group->specialGroups()))
607 $allGroups[] = $group;
609 //array_unique(array_merge($this->_group->getAllGroupsIn(),
610 $deletesrc = $WikiTheme->_findData('images/delete.png');
611 $addsrc = $WikiTheme->_findData('images/add.png');
612 $nbsp = HTML::raw(' ');
613 foreach ($this->perm as $access => $groups) {
614 //$permlist = HTML::table(array('class' => 'cal'));
616 $newperm = HTML::input(array('type' => 'checkbox',
617 'name' => "acl[_new_perm][$access]",
619 $addbutton = HTML::input(array('type' => 'checkbox',
620 'name' => "acl[_add_group][$access]",
623 'title' => _("Add this ACL"),
625 $newgroup = HTML::select(array('name' => "acl[_new_group][$access]",
626 'style'=> 'text-align: right;',
628 foreach ($allGroups as $groupname) {
629 if (!isset($groups[$groupname]))
630 $newgroup->pushContent(HTML::option(array('value' => $groupname),
631 $this->groupName($groupname)));
633 if (empty($groups)) {
634 $addbutton->setAttr('checked','checked');
635 $newperm->setAttr('checked','checked');
637 HTML::tr(array('valign' => 'top'),
638 HTML::td(HTML::strong($access.":")),
640 HTML::td($nbsp,$newperm),
641 HTML::td($nbsp,$addbutton),
642 HTML::td(HTML::em(getAccessDescription($access)))));
644 foreach ($groups as $group => $bool) {
645 $checkbox = HTML::input(array('type' => 'checkbox',
646 'name' => "acl[$access][$group]",
647 'title' => _("Allow / Deny"),
649 if ($bool) $checkbox->setAttr('checked','checked');
650 $checkbox = HTML(HTML::input(array('type' => 'hidden',
651 'name' => "acl[$access][$group]",
654 $deletebutton = HTML::input(array('type' => 'checkbox',
655 'name' => "acl[_del_group][$access][$group]",
656 'style' => 'background: #aaa url('.$deletesrc.')',
657 //'src' => $deletesrc,
659 'title' => _("Delete this ACL"),
664 HTML::td(HTML::strong($access.":")),
665 HTML::td(array('class' => 'cal-today','align'=>'right'),
666 HTML::strong($this->groupName($group))),
667 HTML::td(array('align'=>'center'),$nbsp,$checkbox),
668 HTML::td(array('align'=>'right','style' => 'background: #aaa url('.$deletesrc.') no-repeat'),$deletebutton),
669 HTML::td(HTML::em(getAccessDescription($access)))));
675 HTML::td(array('class' => 'cal-today','align'=>'right'),
676 HTML::strong($this->groupName($group))),
677 HTML::td(array('align'=>'center'),$nbsp,$checkbox),
678 HTML::td(array('align'=>'right','style' => 'background: #aaa url('.$deletesrc.') no-repeat'),$deletebutton),
684 HTML::tr(array('valign' => 'top'),
685 HTML::td(array('align'=>'right'),_("add ")),
687 HTML::td(array('align'=>'center'),$nbsp,$newperm),
688 HTML::td(array('align'=>'right','style' => 'background: #ccc url('.$addsrc.') no-repeat'),$addbutton),
689 HTML::td(HTML::small(_("Check to add this ACL")))));
691 if ($type == 'default')
692 $table->setAttr('style','border: dotted thin black; background-color:#eee;');
693 elseif ($type == 'inherited')
694 $table->setAttr('style','border: dotted thin black; background-color:#ddd;');
695 elseif ($type == 'page')
696 $table->setAttr('style','border: solid thin black; font-weight: bold;');
700 // Print ACL as lines of [+-]user[,group,...]:access[,access...]
701 // Seperate acl's by "; " or whitespace
702 // See http://opag.ca/wiki/HelpOnAccessControlLists
703 // As used by WikiAdminSetAclSimple
704 function asAclLines() {
707 foreach ($this->perm as $access => $groups) {
708 // unify groups for same access+bool
709 // view:CREATOR,-OWNER,
711 foreach ($groups as $group => $bool) {
712 $line .= ($bool?'':'-').$group.",";
714 if (substr($line,-1) == ',')
715 $s .= substr($line,0,-1)."; ";
717 if (substr($s,-2) == '; ')
718 $s = substr($s,0,-2);
722 // Print ACL as group followed by actions allowed for the group
723 function asAclGroupLines() {
726 $perm =& $this->perm;
727 $actions = array("view", "edit", "create", "list", "remove", "purge", "dump", "change");
728 $groups = array(ACL_EVERY, ACL_ANONYMOUS, ACL_BOGOUSER, ACL_HASHOMEPAGE, ACL_SIGNED, ACL_AUTHENTICATED, ACL_ADMIN, ACL_OWNER, ACL_CREATOR);
730 foreach ($groups as $group) {
732 foreach ($actions as $action) {
733 if (isset($perm[$action][$group])) {
738 $s .= (($perm[$action][$group] ? " " : " -") . $action);
748 // This is just a bad hack for testing.
749 // Simplify the ACL to a unix-like "rwx------+" string
751 function asRwxString($owner,$group=false) {
753 // simplify object => rwxrw---x+ string as in cygwin (+ denotes additional ACLs)
754 $perm =& $this->perm;
755 // get effective user and group
757 if (isset($perm['view'][$owner]) or
758 (isset($perm['view'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
760 if (isset($perm['edit'][$owner]) or
761 (isset($perm['edit'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
763 if (isset($perm['change'][$owner]) or
764 (isset($perm['change'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
766 if (!empty($group)) {
767 if (isset($perm['view'][$group]) or
768 (isset($perm['view'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
770 if (isset($perm['edit'][$group]) or
771 (isset($perm['edit'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
773 if (isset($perm['change'][$group]) or
774 (isset($perm['change'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
777 if (isset($perm['view'][ACL_EVERY]) or
778 (isset($perm['view'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
780 if (isset($perm['edit'][ACL_EVERY]) or
781 (isset($perm['edit'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
783 if (isset($perm['change'][ACL_EVERY]) or
784 (isset($perm['change'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
794 // c-hanging-comment-ender-p: nil
795 // indent-tabs-mode: nil