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 // Page not found; check against default permissions
238 if (! $page->exists() ) {
239 $perm = new PagePermission();
240 $result = ($perm->isAuthorized($access, $request->_user) === true);
241 $permcache[$pagename][$access] = $result;
244 // no ACL defined; check for special dotfile or walk down
245 if (! ($perm = getPagePermissions($page))) {
246 if ($pagename == '.') {
247 $perm = new PagePermission();
248 if ($perm->isAuthorized('change', $request->_user)) {
249 // warn the user to set ACL of ".", if he has permissions to do so.
250 trigger_error(". (dotpage == rootpage for inheriting pageperm ACLs) exists without any ACL!\n".
251 "Please do ?action=setacl&pagename=.", E_USER_WARNING);
253 $result = ($perm->isAuthorized($access, $request->_user) === true);
254 $permcache[$pagename][$access] = $result;
256 } elseif ($pagename[0] == '.') {
257 $perm = new PagePermission(PagePermission::dotPerms());
258 $result = ($perm->isAuthorized($access, $request->_user) === true);
259 $permcache[$pagename][$access] = $result;
262 return _requiredAuthorityForPagename($access, getParentPage($pagename));
264 // ACL defined; check if isAuthorized returns true or false or undecided
265 $authorized = $perm->isAuthorized($access, $request->_user);
266 if ($authorized !== -1) { // interestingly true is also -1
267 $permcache[$pagename][$access] = $authorized;
269 } elseif ($pagename == '.') {
272 return _requiredAuthorityForPagename($access, getParentPage($pagename));
277 * @param string $pagename page from which the parent page is searched.
278 * @return string parent pagename or the (possibly pseudo) dot-pagename.
280 function getParentPage($pagename) {
281 if (isSubPage($pagename)) {
282 return subPageSlice($pagename, 0);
288 // Read the ACL from the page
289 // Done: Not existing pages should NOT be queried.
290 // Check the parent page instead and don't take the default ACL's
291 function getPagePermissions ($page) {
292 if ($hash = $page->get('perm')) // hash => object
293 return new PagePermission(unserialize($hash));
298 // Store the ACL in the page
299 function setPagePermissions ($page,$perm) {
303 function getAccessDescription($access) {
304 static $accessDescriptions;
305 if (! $accessDescriptions) {
306 $accessDescriptions = array(
307 'list' => _("List this page and all subpages"),
308 'view' => _("View this page and all subpages"),
309 'edit' => _("Edit this page and all subpages"),
310 'create' => _("Create a new (sub)page"),
311 'dump' => _("Download page contents"),
312 'change' => _("Change page attributes"),
313 'remove' => _("Remove this page"),
314 'purge' => _("Purge this page"),
317 if (in_array($access, array_keys($accessDescriptions)))
318 return $accessDescriptions[$access];
324 function array_diff_assoc_recursive($array1, $array2) {
325 foreach ($array1 as $key => $value) {
326 if (is_array($value)) {
327 if (!is_array($array2[$key])) {
328 $difference[$key] = $value;
330 $new_diff = array_diff_assoc_recursive($value, $array2[$key]);
331 if ($new_diff != false) {
332 $difference[$key] = $new_diff;
335 } elseif(!isset($array2[$key]) || $array2[$key] != $value) {
336 $difference[$key] = $value;
339 return !isset($difference) ? 0 : $difference;
343 * The ACL object per page. It is stored in a page, but can also
344 * be merged with ACL's from other pages or taken from the master (pseudo) dot-file.
346 * A hash of "access" => "requires" pairs.
347 * "access" is a shortcut for common actions, which map to main.php actions
348 * "requires" required username or groupname or any special group => true or false
350 * Define any special rules here, like don't list dot-pages.
352 class PagePermission {
355 function PagePermission($hash = array()) {
356 $this->_group = &$GLOBALS['request']->getGroup();
357 if (is_array($hash) and !empty($hash)) {
358 $accessTypes = $this->accessTypes();
359 foreach ($hash as $access => $requires) {
360 if (in_array($access, $accessTypes))
361 $this->perm[$access] = $requires;
363 trigger_error(sprintf(_("Unsupported ACL access type %s ignored."), $access),
367 // set default permissions, the so called dot-file acl's
368 $this->perm = $this->defaultPerms();
374 * The workhorse to check the user against the current ACL pairs.
375 * Must translate the various special groups to the actual users settings
376 * (userid, group membership).
378 function isAuthorized($access, $user) {
379 if (!empty($this->perm{$access})) {
381 foreach ($this->perm[$access] as $group => $bool) {
382 if ($this->isMember($user, $group)) {
384 } elseif ($allow == -1) { // not a member and undecided: check other groups
389 return $allow; // undecided
393 * Translate the various special groups to the actual users settings
394 * (userid, group membership).
396 function isMember($user, $group) {
398 if ($group === ACL_EVERY) return true;
399 if (!isset($this->_group)) $member =& $request->getGroup();
400 else $member =& $this->_group;
401 //$user = & $request->_user;
402 if ($group === ACL_ADMIN) // WIKI_ADMIN or member of _("Administrators")
403 return $user->isAdmin() or
404 ($user->isAuthenticated() and
405 $member->isMember(GROUP_ADMIN));
406 if ($group === ACL_ANONYMOUS)
407 return ! $user->isSignedIn();
408 if ($group === ACL_BOGOUSER)
410 return isa($user,'_BogoUser') or
411 (isWikiWord($user->_userid) and $user->_level >= WIKIAUTH_BOGO);
412 else return isWikiWord($user->UserName());
413 if ($group === ACL_HASHOMEPAGE)
414 return $user->hasHomePage();
415 if ($group === ACL_SIGNED)
416 return $user->isSignedIn();
417 if ($group === ACL_AUTHENTICATED)
418 return $user->isAuthenticated();
419 if ($group === ACL_OWNER) {
420 if (!$user->isAuthenticated()) return false;
421 $page = $request->getPage();
422 $owner = $page->getOwner();
423 return ($owner === $user->UserName()
424 or $member->isMember($owner));
426 if ($group === ACL_CREATOR) {
427 if (!$user->isAuthenticated()) return false;
428 $page = $request->getPage();
429 $creator = $page->getCreator();
430 return ($creator === $user->UserName()
431 or $member->isMember($creator));
433 /* Or named groups or usernames.
434 Note: We don't seperate groups and users here.
435 Users overrides groups with the same name.
437 return $user->UserName() === $group or
438 $member->isMember($group);
442 * returns hash of default permissions.
443 * check if the page '.' exists and returns this instead.
445 function defaultPerms() {
446 //Todo: check for the existance of '.' and take this instead.
447 //Todo: honor more config.ini auth settings here
448 $perm = array('view' => array(ACL_EVERY => true),
449 'edit' => array(ACL_EVERY => true),
450 'create' => array(ACL_EVERY => true),
451 'list' => array(ACL_EVERY => true),
452 'remove' => array(ACL_ADMIN => true,
454 'purge' => array(ACL_ADMIN => true,
456 'dump' => array(ACL_ADMIN => true,
458 'change' => array(ACL_ADMIN => true,
461 $perm['dump'] = array(ACL_ADMIN => true,
463 elseif (INSECURE_ACTIONS_LOCALHOST_ONLY) {
465 $perm['dump'] = array(ACL_EVERY => true);
467 $perm['dump'] = array(ACL_ADMIN => true);
470 $perm['dump'] = array(ACL_EVERY => true);
471 if (defined('REQUIRE_SIGNIN_BEFORE_EDIT') && REQUIRE_SIGNIN_BEFORE_EDIT)
472 $perm['edit'] = array(ACL_SIGNED => true);
474 if (!ALLOW_ANON_USER) {
475 if (!ALLOW_USER_PASSWORDS)
476 $perm['view'] = array(ACL_SIGNED => true);
478 $perm['view'] = array(ACL_AUTHENTICATED => true);
479 $perm['view'][ACL_BOGOUSER] = ALLOW_BOGO_LOGIN ? true : false;
482 if (!ALLOW_ANON_EDIT) {
483 if (!ALLOW_USER_PASSWORDS)
484 $perm['edit'] = array(ACL_SIGNED => true);
486 $perm['edit'] = array(ACL_AUTHENTICATED => true);
487 $perm['edit'][ACL_BOGOUSER] = ALLOW_BOGO_LOGIN ? true : false;
488 $perm['create'] = $perm['edit'];
494 * FIXME: check valid groups and access
497 foreach ($this->perm as $access => $groups) {
498 foreach ($groups as $group => $bool) {
499 $this->perm[$access][$group] = (boolean) $bool;
505 * do a recursive comparison
507 function equal($otherperm) {
508 // The equal function seems to be unable to detect removed perm.
509 // Use case is when a rule is removed.
510 return (print_r($this->perm, true) === print_r($otherperm, true));
512 // $diff = array_diff_assoc_recursive($this->perm, $otherperm);
513 // return empty($diff);
517 * returns list of all supported access types.
519 function accessTypes() {
520 return array_keys(PagePermission::defaultPerms());
524 * special permissions for dot-files, beginning with '.'
525 * maybe also for '_' files?
527 function dotPerms() {
528 $def = array(ACL_ADMIN => true,
531 foreach (PagePermission::accessTypes() as $access) {
532 $perm[$access] = $def;
538 * dead code. not needed inside the object. see getPagePermissions($page)
540 function retrieve($page) {
541 $hash = $page->get('perm');
542 if ($hash) // hash => object
543 $perm = new PagePermission(unserialize($hash));
545 $perm = new PagePermission();
550 function store($page) {
553 return $page->set('perm',serialize($this->perm));
556 function groupName ($group) {
557 if ($group[0] == '_') return constant("GROUP".$group);
561 /* type: page, default, inherited */
562 function asTable($type) {
563 $table = HTML::table();
564 foreach ($this->perm as $access => $perms) {
565 $td = HTML::table(array('class' => 'cal'));
566 foreach ($perms as $group => $bool) {
567 $td->pushContent(HTML::tr(HTML::td(array('align'=>'right'),$group),
568 HTML::td($bool ? '[X]' : '[ ]')));
570 $table->pushContent(HTML::tr(array('valign' => 'top'),
571 HTML::td($access),HTML::td($td)));
573 if ($type == 'default')
574 $table->setAttr('style','border: dotted thin black; background-color:#eee;');
575 elseif ($type == 'inherited')
576 $table->setAttr('style','border: dotted thin black; background-color:#ddd;');
577 elseif ($type == 'page')
578 $table->setAttr('style','border: solid thin black; font-weight: bold;');
582 /* type: page, default, inherited */
583 function asEditableTable($type) {
585 if (!isset($this->_group)) {
586 $this->_group =& $GLOBALS['request']->getGroup();
588 $table = HTML::table();
589 $table->pushContent(HTML::tr(
590 HTML::th(array('align' => 'left'),
592 HTML::th(array('align'=>'right'),
594 HTML::th(_("Grant")),
595 HTML::th(_("Del/+")),
596 HTML::th(_("Description"))));
598 $allGroups = $this->_group->_specialGroups();
599 foreach ($this->_group->getAllGroupsIn() as $group) {
600 if (!in_array($group,$this->_group->specialGroups()))
601 $allGroups[] = $group;
603 //array_unique(array_merge($this->_group->getAllGroupsIn(),
604 $deletesrc = $WikiTheme->_findData('images/delete.png');
605 $addsrc = $WikiTheme->_findData('images/add.png');
606 $nbsp = HTML::raw(' ');
607 foreach ($this->perm as $access => $groups) {
608 //$permlist = HTML::table(array('class' => 'cal'));
610 $newperm = HTML::input(array('type' => 'checkbox',
611 'name' => "acl[_new_perm][$access]",
613 $addbutton = HTML::input(array('type' => 'checkbox',
614 'name' => "acl[_add_group][$access]",
617 'title' => _("Add this ACL"),
619 $newgroup = HTML::select(array('name' => "acl[_new_group][$access]",
620 'style'=> 'text-align: right;',
622 foreach ($allGroups as $groupname) {
623 if (!isset($groups[$groupname]))
624 $newgroup->pushContent(HTML::option(array('value' => $groupname),
625 $this->groupName($groupname)));
627 if (empty($groups)) {
628 $addbutton->setAttr('checked','checked');
629 $newperm->setAttr('checked','checked');
631 HTML::tr(array('valign' => 'top'),
632 HTML::td(HTML::strong($access.":")),
634 HTML::td($nbsp,$newperm),
635 HTML::td($nbsp,$addbutton),
636 HTML::td(HTML::em(getAccessDescription($access)))));
638 foreach ($groups as $group => $bool) {
639 $checkbox = HTML::input(array('type' => 'checkbox',
640 'name' => "acl[$access][$group]",
641 'title' => _("Allow / Deny"),
643 if ($bool) $checkbox->setAttr('checked','checked');
644 $checkbox = HTML(HTML::input(array('type' => 'hidden',
645 'name' => "acl[$access][$group]",
648 $deletebutton = HTML::input(array('type' => 'checkbox',
649 'name' => "acl[_del_group][$access][$group]",
650 'style' => 'background: #aaa url('.$deletesrc.')',
651 //'src' => $deletesrc,
653 'title' => _("Delete this ACL"),
658 HTML::td(HTML::strong($access.":")),
659 HTML::td(array('class' => 'cal-today','align'=>'right'),
660 HTML::strong($this->groupName($group))),
661 HTML::td(array('align'=>'center'),$nbsp,$checkbox),
662 HTML::td(array('align'=>'right','style' => 'background: #aaa url('.$deletesrc.') no-repeat'),$deletebutton),
663 HTML::td(HTML::em(getAccessDescription($access)))));
669 HTML::td(array('class' => 'cal-today','align'=>'right'),
670 HTML::strong($this->groupName($group))),
671 HTML::td(array('align'=>'center'),$nbsp,$checkbox),
672 HTML::td(array('align'=>'right','style' => 'background: #aaa url('.$deletesrc.') no-repeat'),$deletebutton),
678 HTML::tr(array('valign' => 'top'),
679 HTML::td(array('align'=>'right'),_("add ")),
681 HTML::td(array('align'=>'center'),$nbsp,$newperm),
682 HTML::td(array('align'=>'right','style' => 'background: #ccc url('.$addsrc.') no-repeat'),$addbutton),
683 HTML::td(HTML::small(_("Check to add this ACL")))));
685 if ($type == 'default')
686 $table->setAttr('style','border: dotted thin black; background-color:#eee;');
687 elseif ($type == 'inherited')
688 $table->setAttr('style','border: dotted thin black; background-color:#ddd;');
689 elseif ($type == 'page')
690 $table->setAttr('style','border: solid thin black; font-weight: bold;');
694 // Print ACL as lines of [+-]user[,group,...]:access[,access...]
695 // Seperate acl's by "; " or whitespace
696 // See http://opag.ca/wiki/HelpOnAccessControlLists
697 // As used by WikiAdminSetAclSimple
698 function asAclLines() {
701 foreach ($this->perm as $access => $groups) {
702 // unify groups for same access+bool
703 // view:CREATOR,-OWNER,
705 foreach ($groups as $group => $bool) {
706 $line .= ($bool?'':'-').$group.",";
708 if (substr($line,-1) == ',')
709 $s .= substr($line,0,-1)."; ";
711 if (substr($s,-2) == '; ')
712 $s = substr($s,0,-2);
716 // Print ACL as group followed by actions allowed for the group
717 function asAclGroupLines() {
720 $perm =& $this->perm;
721 $actions = array("view", "edit", "create", "list", "remove", "purge", "dump", "change");
722 $groups = array(ACL_EVERY, ACL_ANONYMOUS, ACL_BOGOUSER, ACL_HASHOMEPAGE, ACL_SIGNED, ACL_AUTHENTICATED, ACL_ADMIN, ACL_OWNER, ACL_CREATOR);
724 foreach ($groups as $group) {
726 foreach ($actions as $action) {
727 if (isset($perm[$action][$group])) {
732 if ($perm[$action][$group]) {
746 // This is just a bad hack for testing.
747 // Simplify the ACL to a unix-like "rwx------+" string
749 function asRwxString($owner,$group=false) {
751 // simplify object => rwxrw---x+ string as in cygwin (+ denotes additional ACLs)
752 $perm =& $this->perm;
753 // get effective user and group
755 if (isset($perm['view'][$owner]) or
756 (isset($perm['view'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
758 if (isset($perm['edit'][$owner]) or
759 (isset($perm['edit'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
761 if (isset($perm['change'][$owner]) or
762 (isset($perm['change'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
764 if (!empty($group)) {
765 if (isset($perm['view'][$group]) or
766 (isset($perm['view'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
768 if (isset($perm['edit'][$group]) or
769 (isset($perm['edit'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
771 if (isset($perm['change'][$group]) or
772 (isset($perm['change'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
775 if (isset($perm['view'][ACL_EVERY]) or
776 (isset($perm['view'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
778 if (isset($perm['edit'][ACL_EVERY]) or
779 (isset($perm['edit'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
781 if (isset($perm['change'][ACL_EVERY]) or
782 (isset($perm['change'][ACL_AUTHENTICATED]) and $request->_user->isAuthenticated()))
792 // c-hanging-comment-ender-p: nil
793 // indent-tabs-mode: nil