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377 lines
11 KiB
PHP
377 lines
11 KiB
PHP
<?php
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/***************************************************************************
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* auth.php
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* -------------------
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* begin : Saturday, Feb 13, 2001
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* copyright : (C) 2001 The phpBB Group
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* email : support@phpbb.com
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*
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* $Id$
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*
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*
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***************************************************************************/
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/***************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*
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***************************************************************************/
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/*
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$type's accepted (eventually!):
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VIEW, READ, POST, REPLY, EDIT, DELETE, VOTE, VOTECREATE
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Possible options to send to auth (not all are functional yet!):
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* If you include a type then a specific lookup will
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be done and the single result returned
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* If you set type to ALL an array of all auth types
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will be returned
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* If you provide a forum_id a specific lookup on that
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forum will be done
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* If you set forum_id to LIST_ALL an array of all
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forums to which the user has access of type will be returned
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<- used for index and search? (type VIEW and READ respectively)
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* If you set forum_id to LIST_ALL and type to ALL a
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multidimensional array containing the auth permissions
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for all types and all forums for that user is returned
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* If you set $userdata to ALL, then the permissions of all
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users listed in the auth_access table will be returned for
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the given type and forum_id <- use to check for moderators?
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All results are returned as associative arrays, even
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when a single auth type is specified
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*/
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function auth($type, $forum_id, $userdata, $f_access = -1)
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{
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global $db, $lang;
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switch($type)
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{
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case AUTH_ALL:
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$a_sql = "au.auth_view, au.auth_read, au.auth_post, au.auth_reply, au.auth_edit, au.auth_delete, au.auth_announce, au.auth_sticky, au.auth_votecreate, au.auth_vote, au.auth_attachments";
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$auth_fields = array("auth_view", "auth_read", "auth_post", "auth_reply", "auth_edit", "auth_delete", "auth_announce", "auth_sticky", "auth_votecreate", "auth_vote", "auth_attachments");
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break;
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case AUTH_VIEW:
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$a_sql = "au.auth_view";
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$auth_fields = array("auth_view");
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break;
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case AUTH_READ:
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$a_sql = "au.auth_read";
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$auth_fields = array("auth_read");
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break;
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case AUTH_POST:
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$a_sql = "au.auth_post";
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$auth_fields = array("auth_post");
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break;
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case AUTH_REPLY:
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$a_sql = "au.auth_reply";
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$auth_fields = array("auth_reply");
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break;
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case AUTH_EDIT:
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$a_sql = "au.auth_edit";
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$auth_fields = array("auth_edit");
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break;
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case AUTH_DELETE:
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$a_sql = "au.auth_delete";
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$auth_fields = array("auth_delete");
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break;
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case AUTH_ANNOUNCE:
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$a_sql = "au.auth_announce";
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$auth_fields = array("auth_announce");
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break;
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case AUTH_STICKY:
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$a_sql = "au.auth_sticky";
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$auth_fields = array("auth_sticky");
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break;
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case AUTH_VOTECREATE:
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$a_sql = "au.auth_votecreate";
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$auth_fields = array("auth_votecreate");
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break;
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case AUTH_VOTE:
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$a_sql = "au.auth_vote";
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$auth_fields = array("auth_vote");
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break;
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case AUTH_ATTACH:
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$a_sql = "au.auth_attachments";
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$auth_fields = array("auth_attachments");
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break;
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case AUTH_ALLOW_HTML:
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break;
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case AUTH_ALLOW_BBCODE:
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break;
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case AUTH_ALLOW_SMILIES:
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break;
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default:
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break;
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}
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//
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// If f_access has been passed, or auth
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// is needed to return an array of forums
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// then we need to pull the auth information
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// on the given forum (or all forums)
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//
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if($f_access == -1)
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{
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$forum_match_sql = ($forum_id != AUTH_LIST_ALL) ? "WHERE au.forum_id = $forum_id" : "";
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$sql = "SELECT au.forum_id, $a_sql
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FROM ".FORUMS_TABLE." au
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$forum_match_sql";
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$af_result = $db->sql_query($sql);
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if(!$af_result)
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{
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error_die(QUERY_ERROR, "Failed obtaining forum access control lists");
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}
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else
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{
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if(!$db->sql_numrows($af_result))
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{
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error_die(GENERAL_ERROR, "No forum access control lists exist!");
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}
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else
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{
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$f_access = ($forum_id != AUTH_LIST_ALL) ? $db->sql_fetchrow($af_result) : $db->sql_fetchrowset($af_result);
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}
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}
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}
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//
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// If the user isn't logged on then
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// all we need do is check if the forum
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// has the type set to ALL, if yes then
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// they're good to go, if not then they
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// are denied access
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//
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$auth_user = array();
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if($userdata['session_logged_in'])
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{
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$forum_match_sql = ($forum_id != AUTH_LIST_ALL) ? "AND ( au.forum_id = $forum_id OR au.forum_id = 0 )" : "";
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$sql = "SELECT au.forum_id, $a_sql, au.auth_mod, g.group_single_user
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FROM ".AUTH_ACCESS_TABLE." au, " . USER_GROUP_TABLE. " ug, " . GROUPS_TABLE. " g
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WHERE ug.user_id = ".$userdata['user_id']. "
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AND g.group_id = ug.group_id
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AND au.group_id = ug.group_id
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$forum_match_sql";
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$au_result = $db->sql_query($sql);
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if(!$au_result)
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{
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error_die(QUERY_ERROR, "Failed obtaining forum access control lists");
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}
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$num_u_access = $db->sql_numrows($au_result);
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if($num_u_access)
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{
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while($u_row = $db->sql_fetchrow($au_result))
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{
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$u_access[$u_row['forum_id']] = $u_row;
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}
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}
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}
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$is_admin = ($userdata['user_level'] == ADMIN) ? 1 : 0;
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$auth_user = array();
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for($i = 0; $i < count($auth_fields); $i++)
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{
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$key = $auth_fields[$i];
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//
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// If the user is logged on and the forum type is either
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// ALL or REG then the user has access
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//
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// If the type if ACL, MOD or ADMIN then we need to see
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// if the user has specific permissions to do whatever it
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// is they want to do ... to do this we pull relevant
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// information for the user (and any groups they belong to)
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//
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// Now we compare the users access level against the forums
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// We assume here that a moderator and admin automatically
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// have access to an ACL forum, similarly we assume admins
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// meet an auth requirement of MOD
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//
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// The access level assigned to a single user automatically
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// takes precedence over any levels granted by that user being
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// a member of a multi-user usergroup, eg. a user who is banned
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// from a forum won't gain access to it even if they belong to
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// a group which has access (and vice versa). This check is
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// done via the single_user check
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//
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// PS : I appologise for the fantastically clear and hugely
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// readable code here ;) Simple gist is, if this row of
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// auth_access doesn't represent a single user then OR the
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// contents of relevant auth_access levels against the current
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// level (allows maximum group privileges to be assigned). If
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// the row does represent a single user then forget any previous
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// group results and instead set the auth to whatever the OR'd
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// contents of the access levels are.
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//
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if($forum_id != AUTH_LIST_ALL)
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{
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$value = $f_access[$key];
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switch($value)
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{
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case AUTH_ALL:
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$auth_user[$key] = 1;
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$auth_user[$key . '_type'] = $lang['Anonymous_users'];
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break;
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case AUTH_REG:
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$auth_user[$key] = ($userdata['session_logged_in']) ? 1 : 0;
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$auth_user[$key . '_type'] = $lang['Registered_Users'];
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break;
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case AUTH_ACL:
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$auth_user[$key] = ($userdata['session_logged_in'] && $num_u_access) ? auth_check_user(AUTH_ACL, $key, $u_access, $is_admin) : 0;
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$auth_user[$key . '_type'] = $lang['Users_granted_access'];
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break;
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case AUTH_MOD:
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$auth_user[$key] = ($userdata['session_logged_in'] && $num_u_access) ? auth_check_user(AUTH_MOD, $key, $u_access, $is_admin) : 0;
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$auth_user[$key . '_type'] = $lang['Moderators'];
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break;
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case AUTH_ADMIN:
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$auth_user[$key] = $is_admin;
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$auth_user[$key . '_type'] = $lang['Administrators'];
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break;
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default:
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$auth_user[$key] = 0;
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break;
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}
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}
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else
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{
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for($k = 0; $k < count($f_access); $k++)
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{
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$value = $f_access[$k][$key];
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$f_forum_id = $f_access[$k]['forum_id'];
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switch($value)
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{
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case AUTH_ALL:
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$auth_user[$f_forum_id][$key] = 1;
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$auth_user[$f_forum_id][$key . '_type'] = $lang['Anonymous_users'];
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break;
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case AUTH_REG:
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$auth_user[$f_forum_id][$key] = ($userdata['session_logged_in']) ? 1 : 0;
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$auth_user[$f_forum_id][$key . '_type'] = $lang['Registered_Users'];
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break;
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case AUTH_ACL:
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$auth_user[$f_forum_id][$key] = ($userdata['session_logged_in'] && $num_u_access) ? auth_check_user(AUTH_ACL, $key, $u_access, $is_admin) : 0;
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$auth_user[$f_forum_id][$key . '_type'] = $lang['Users_granted_access'];
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break;
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case AUTH_MOD:
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$auth_user[$f_forum_id][$key] = ($userdata['session_logged_in'] && $num_u_access) ? auth_check_user(AUTH_MOD, $key, $u_access, $is_admin) : 0;
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$auth_user[$f_forum_id][$key . '_type'] = $lang['Moderators'];
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break;
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case AUTH_ADMIN:
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$auth_user[$f_forum_id][$key] = $is_admin;
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$auth_user[$f_forum_id][$key . '_type'] = $lang['Administrators'];
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break;
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default:
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$auth_user[$f_forum_id][$key] = 0;
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break;
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}
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}
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}
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}
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//
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// Is user a moderator?
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//
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if($forum_id != AUTH_LIST_ALL)
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{
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$auth_user['auth_mod'] = ($userdata['session_logged_in'] && $num_u_access) ? auth_check_user(AUTH_MOD, 'auth_mod', $u_access, $is_admin) : 0;
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}
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else
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{
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for($k = 0; $k < count($f_access); $k++)
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{
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$f_forum_id = $f_access[$k]['forum_id'];
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$auth_user[$f_forum_id]['auth_mod'] = ($userdata['session_logged_in'] && $num_u_access) ? auth_check_user(AUTH_MOD, 'auth_mod', $u_access, $is_admin) : 0;
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}
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}
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//
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// Is user an admin (this is
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// really redundant at this time)
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//
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if($forum_id != AUTH_LIST_ALL)
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{
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$auth_user['auth_admin'] = $is_admin;
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}
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else
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{
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for($k = 0; $k < count($f_access); $k++)
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{
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$f_forum_id = $f_access[$k]['forum_id'];
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$auth_user[$f_forum_id]['auth_admin'] = $is_admin;
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}
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}
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return $auth_user;
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}
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function auth_check_user($type, $key, $u_access, $is_admin)
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{
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$single_user = 0;
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$auth_user = 0;
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for($j = 0; $j < count($u_access); $j++)
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{
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if(!$single_user)
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{
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$single_user = $u_access[$j]['group_single_user'];
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$result = 0;
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switch($type)
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{
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case AUTH_ACL:
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$result = $u_access[$j][$key];
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case AUTH_MOD:
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$result = $result || $u_access[$j]['auth_mod'];
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case AUTH_ADMIN:
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$result = $result || $is_admin;
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break;
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}
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$auth_user = (!$single_user) ? ( $auth_user || $result ) : $result;
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}
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}
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return $auth_user;
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}
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?>
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