3 * @file /src/Util/Security.php
6 namespace Friendica\Util;
8 use Friendica\BaseObject;
9 use Friendica\Database\DBA;
10 use Friendica\Model\Contact;
11 use Friendica\Model\Group;
12 use Friendica\Model\User;
15 * Secures that User is allow to do requests
17 class Security extends BaseObject
19 public static function canWriteToUserWall($owner)
23 if (!local_user() && !remote_user()) {
32 if (local_user() && ($owner == 0)) {
37 // use remembered decision and avoid a DB lookup for each and every display item
38 // DO NOT use this function if there are going to be multiple owners
39 // We have a contact-id for an authenticated remote user, this block determines if the contact
40 // belongs to this page owner, and has the necessary permissions to post content
42 if ($verified === 2) {
44 } elseif ($verified === 1) {
49 if (!empty($_SESSION['remote'])) {
50 foreach ($_SESSION['remote'] as $visitor) {
51 if ($visitor['uid'] == $owner) {
52 $cid = $visitor['cid'];
62 $r = q("SELECT `contact`.*, `user`.`page-flags` FROM `contact` INNER JOIN `user` on `user`.`uid` = `contact`.`uid`
63 WHERE `contact`.`uid` = %d AND `contact`.`id` = %d AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
64 AND `user`.`blockwall` = 0 AND `readonly` = 0 AND ( `contact`.`rel` IN ( %d , %d ) OR `user`.`page-flags` = %d ) LIMIT 1",
67 intval(Contact::SHARING),
68 intval(Contact::FRIEND),
69 intval(User::PAGE_FLAGS_COMMUNITY)
72 if (DBA::isResult($r)) {
84 /// @TODO $groups should be array
85 public static function getPermissionsSQLByUserId($owner_id, $remote_verified = false, $groups = null)
87 $local_user = local_user();
88 $remote_user = remote_user();
91 * Construct permissions
93 * default permissions - anonymous user
95 $sql = " AND allow_cid = ''
102 * Profile owner - everything is visible
104 if ($local_user && $local_user == $owner_id) {
107 * Authenticated visitor. Unless pre-verified,
108 * check that the contact belongs to this $owner_id
109 * and load the groups the visitor belongs to.
110 * If pre-verified, the caller is expected to have already
111 * done this and passed the groups into this function.
113 } elseif ($remote_user) {
115 * Authenticated visitor. Unless pre-verified,
116 * check that the contact belongs to this $owner_id
117 * and load the groups the visitor belongs to.
118 * If pre-verified, the caller is expected to have already
119 * done this and passed the groups into this function.
122 if (!$remote_verified) {
123 if (DBA::exists('contact', ['id' => $remote_user, 'uid' => $owner_id, 'blocked' => false])) {
124 $remote_verified = true;
125 $groups = Group::getIdsByContactId($remote_user);
129 if ($remote_verified) {
130 $gs = '<<>>'; // should be impossible to match
132 if (is_array($groups)) {
133 foreach ($groups as $g) {
134 $gs .= '|<' . intval($g) . '>';
139 " AND ( NOT (deny_cid REGEXP '<%d>' OR deny_gid REGEXP '%s')
140 AND ( allow_cid REGEXP '<%d>' OR allow_gid REGEXP '%s' OR ( allow_cid = '' AND allow_gid = '') )
143 intval($remote_user),
145 intval($remote_user),