4 * @brief Calculate the hash that is needed for the "Friendica" cookie
6 * @param array $user Record from "user" table
8 * @return string Hashed data
10 function cookie_hash($user) {
11 return(hash("sha256", get_config("system", "site_prvkey").
17 * @brief Set the "Friendica" cookie
20 * @param array $user Record from "user" table
22 function new_cookie($time, $user = array()) {
25 $time = $time + time();
29 $value = json_encode(array("uid" => $user["uid"],
30 "hash" => cookie_hash($user),
31 "ip" => $_SERVER['REMOTE_ADDR']));
37 setcookie("Friendica", $value, $time, "/", "",
38 (get_config('system', 'ssl_policy') == SSL_POLICY_FULL), true);
42 function authenticate_success($user_record, $login_initial = false, $interactive = false, $login_refresh = false) {
46 $_SESSION['uid'] = $user_record['uid'];
47 $_SESSION['theme'] = $user_record['theme'];
48 $_SESSION['mobile-theme'] = get_pconfig($user_record['uid'], 'system', 'mobile_theme');
49 $_SESSION['authenticated'] = 1;
50 $_SESSION['page_flags'] = $user_record['page-flags'];
51 $_SESSION['my_url'] = App::get_baseurl() . '/profile/' . $user_record['nickname'];
52 $_SESSION['my_address'] = $user_record['nickname'] . '@' . substr(App::get_baseurl(),strpos(App::get_baseurl(),'://')+3);
53 $_SESSION['addr'] = $_SERVER['REMOTE_ADDR'];
55 $a->user = $user_record;
58 /// @TODO Comparison of strings this way may lead to bugs/incompatiblities
59 if ($a->user['login_date'] <= NULL_DATE) {
60 $_SESSION['return_url'] = 'profile_photo/new';
61 $a->module = 'profile_photo';
62 info( t("Welcome ") . $a->user['username'] . EOL);
63 info( t('Please upload a profile photo.') . EOL);
65 info( t("Welcome back ") . $a->user['username'] . EOL);
69 $member_since = strtotime($a->user['register_date']);
71 if (time() < ($member_since + ( 60 * 60 * 24 * 14))) {
72 $_SESSION['new_member'] = true;
74 $_SESSION['new_member'] = false;
77 if (strlen($a->user['timezone'])) {
78 date_default_timezone_set($a->user['timezone']);
79 $a->timezone = $a->user['timezone'];
82 $master_record = $a->user;
84 if ((x($_SESSION,'submanage')) && intval($_SESSION['submanage'])) {
85 $r = q("select * from user where uid = %d limit 1",
86 intval($_SESSION['submanage'])
88 if (dbm::is_result($r))
89 $master_record = $r[0];
92 $r = q("SELECT `uid`,`username`,`nickname` FROM `user` WHERE `password` = '%s' AND `email` = '%s' AND `account_removed` = 0 ",
93 dbesc($master_record['password']),
94 dbesc($master_record['email'])
96 if (dbm::is_result($r))
99 $a->identities = array();
101 $r = q("select `user`.`uid`, `user`.`username`, `user`.`nickname`
102 from manage INNER JOIN user on manage.mid = user.uid where `user`.`account_removed` = 0
103 and `manage`.`uid` = %d",
104 intval($master_record['uid'])
106 if (dbm::is_result($r))
107 $a->identities = array_merge($a->identities,$r);
110 logger('auth_identities: ' . print_r($a->identities,true), LOGGER_DEBUG);
112 logger('auth_identities refresh: ' . print_r($a->identities,true), LOGGER_DEBUG);
114 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` = 1 LIMIT 1",
115 intval($_SESSION['uid']));
116 if (dbm::is_result($r)) {
118 $a->cid = $r[0]['id'];
119 $_SESSION['cid'] = $a->cid;
122 header('X-Account-Management-Status: active; name="' . $a->user['username'] . '"; id="' . $a->user['nickname'] .'"');
124 if ($login_initial || $login_refresh) {
126 q("UPDATE `user` SET `login_date` = '%s' WHERE `uid` = %d",
127 dbesc(datetime_convert()),
128 intval($_SESSION['uid'])
131 // Set the login date for all identities of the user
132 q("UPDATE `user` SET `login_date` = '%s' WHERE `password` = '%s' AND `email` = '%s' AND `account_removed` = 0",
133 dbesc(datetime_convert()),
134 dbesc($master_record['password']),
135 dbesc($master_record['email'])
141 if ($login_initial) {
142 // If the user specified to remember the authentication, then set a cookie
143 // that expires after one week (the default is when the browser is closed).
144 // The cookie will be renewed automatically.
145 // The week ensures that sessions will expire after some inactivity.
146 if ($_SESSION['remember']) {
147 logger('Injecting cookie for remembered user '. $_SESSION['remember_user']['nickname']);
148 new_cookie(604800, $user_record);
149 unset($_SESSION['remember']);
155 if ($login_initial) {
156 call_hooks('logged_in', $a->user);
158 if (($a->module !== 'home') && isset($_SESSION['return_url'])) {
159 goaway(App::get_baseurl() . '/' . $_SESSION['return_url']);
167 function can_write_wall(App $a, $owner) {
169 static $verified = 0;
171 if ((! (local_user())) && (! (remote_user()))) {
177 if (($uid) && ($uid == $owner)) {
183 // use remembered decision and avoid a DB lookup for each and every display item
184 // DO NOT use this function if there are going to be multiple owners
186 // We have a contact-id for an authenticated remote user, this block determines if the contact
187 // belongs to this page owner, and has the necessary permissions to post content
189 if ($verified === 2) {
191 } elseif ($verified === 1) {
196 if (is_array($_SESSION['remote'])) {
197 foreach ($_SESSION['remote'] as $visitor) {
198 if ($visitor['uid'] == $owner) {
199 $cid = $visitor['cid'];
209 $r = q("SELECT `contact`.*, `user`.`page-flags` FROM `contact` INNER JOIN `user` on `user`.`uid` = `contact`.`uid`
210 WHERE `contact`.`uid` = %d AND `contact`.`id` = %d AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
211 AND `user`.`blockwall` = 0 AND `readonly` = 0 AND ( `contact`.`rel` IN ( %d , %d ) OR `user`.`page-flags` = %d ) LIMIT 1",
214 intval(CONTACT_IS_SHARING),
215 intval(CONTACT_IS_FRIEND),
216 intval(PAGE_COMMUNITY)
219 if (dbm::is_result($r)) {
233 function permissions_sql($owner_id,$remote_verified = false,$groups = null) {
235 $local_user = local_user();
236 $remote_user = remote_user();
239 * Construct permissions
241 * default permissions - anonymous user
244 $sql = " AND allow_cid = ''
251 * Profile owner - everything is visible
254 if (($local_user) && ($local_user == $owner_id)) {
259 * Authenticated visitor. Unless pre-verified,
260 * check that the contact belongs to this $owner_id
261 * and load the groups the visitor belongs to.
262 * If pre-verified, the caller is expected to have already
263 * done this and passed the groups into this function.
266 elseif ($remote_user) {
268 if (! $remote_verified) {
269 $r = q("SELECT id FROM contact WHERE id = %d AND uid = %d AND blocked = 0 LIMIT 1",
270 intval($remote_user),
273 if (dbm::is_result($r)) {
274 $remote_verified = true;
275 $groups = init_groups_visitor($remote_user);
278 if ($remote_verified) {
280 $gs = '<<>>'; // should be impossible to match
282 if (is_array($groups) && count($groups)) {
283 foreach ($groups as $g)
284 $gs .= '|<' . intval($g) . '>';
288 " AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' )
289 AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' )
290 AND ( allow_gid = '' OR allow_gid REGEXP '%s' )
291 AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s')
293 intval($remote_user),
294 intval($remote_user),
299 " AND ( NOT (deny_cid REGEXP '<%d>' OR deny_gid REGEXP '%s')
300 AND ( allow_cid REGEXP '<%d>' OR allow_gid REGEXP '%s' OR ( allow_cid = '' AND allow_gid = '') )
303 intval($remote_user),
305 intval($remote_user),
314 function item_permissions_sql($owner_id,$remote_verified = false,$groups = null) {
316 $local_user = local_user();
317 $remote_user = remote_user();
320 * Construct permissions
322 * default permissions - anonymous user
325 $sql = " AND `item`.allow_cid = ''
326 AND `item`.allow_gid = ''
327 AND `item`.deny_cid = ''
328 AND `item`.deny_gid = ''
329 AND `item`.private = 0
333 * Profile owner - everything is visible
336 if ($local_user && ($local_user == $owner_id)) {
341 * Authenticated visitor. Unless pre-verified,
342 * check that the contact belongs to this $owner_id
343 * and load the groups the visitor belongs to.
344 * If pre-verified, the caller is expected to have already
345 * done this and passed the groups into this function.
348 elseif ($remote_user) {
350 if (! $remote_verified) {
351 $r = q("SELECT id FROM contact WHERE id = %d AND uid = %d AND blocked = 0 LIMIT 1",
352 intval($remote_user),
355 if (dbm::is_result($r)) {
356 $remote_verified = true;
357 $groups = init_groups_visitor($remote_user);
360 if ($remote_verified) {
362 $gs = '<<>>'; // should be impossible to match
364 if (is_array($groups) && count($groups)) {
365 foreach ($groups as $g) {
366 $gs .= '|<' . intval($g) . '>';
371 /*" AND ( private = 0 OR ( private in (1,2) AND wall = 1 AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' )
372 AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' )
373 AND ( allow_gid = '' OR allow_gid REGEXP '%s' )
374 AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s')))
376 intval($remote_user),
377 intval($remote_user),
381 " AND ( `item`.private = 0 OR ( `item`.private in (1,2) AND `item`.`wall` = 1
382 AND ( NOT (`item`.deny_cid REGEXP '<%d>' OR `item`.deny_gid REGEXP '%s')
383 AND ( `item`.allow_cid REGEXP '<%d>' OR `item`.allow_gid REGEXP '%s' OR ( `item`.allow_cid = '' AND `item`.allow_gid = '')))))
385 intval($remote_user),
387 intval($remote_user),
398 * Functions used to protect against Cross-Site Request Forgery
399 * The security token has to base on at least one value that an attacker can't know - here it's the session ID and the private key.
400 * In this implementation, a security token is reusable (if the user submits a form, goes back and resubmits the form, maybe with small changes;
401 * or if the security token is used for ajax-calls that happen several times), but only valid for a certain amout of time (3hours).
402 * The "typename" seperates the security tokens of different types of forms. This could be relevant in the following case:
403 * A security token is used to protekt a link from CSRF (e.g. the "delete this profile"-link).
404 * If the new page contains by any chance external elements, then the used security token is exposed by the referrer.
405 * Actually, important actions should not be triggered by Links / GET-Requests at all, but somethimes they still are,
406 * so this mechanism brings in some damage control (the attacker would be able to forge a request to a form of this type, but not to forms of other types).
408 function get_form_security_token($typename = '') {
412 $sec_hash = hash('whirlpool', $a->user['guid'] . $a->user['prvkey'] . session_id() . $timestamp . $typename);
414 return $timestamp . '.' . $sec_hash;
417 function check_form_security_token($typename = '', $formname = 'form_security_token') {
418 if (!x($_REQUEST, $formname)) return false;
419 $hash = $_REQUEST[$formname];
421 $max_livetime = 10800; // 3 hours
425 $x = explode('.', $hash);
426 if (time() > (IntVal($x[0]) + $max_livetime)) return false;
428 $sec_hash = hash('whirlpool', $a->user['guid'] . $a->user['prvkey'] . session_id() . $x[0] . $typename);
430 return ($sec_hash == $x[1]);
433 function check_form_security_std_err_msg() {
434 return t('The form security token was not correct. This probably happened because the form has been opened for too long (>3 hours) before submitting it.') . EOL;
436 function check_form_security_token_redirectOnErr($err_redirect, $typename = '', $formname = 'form_security_token') {
437 if (!check_form_security_token($typename, $formname)) {
439 logger('check_form_security_token failed: user ' . $a->user['guid'] . ' - form element ' . $typename);
440 logger('check_form_security_token failed: _REQUEST data: ' . print_r($_REQUEST, true), LOGGER_DATA);
441 notice( check_form_security_std_err_msg() );
442 goaway(App::get_baseurl() . $err_redirect );
445 function check_form_security_token_ForbiddenOnErr($typename = '', $formname = 'form_security_token') {
446 if (!check_form_security_token($typename, $formname)) {
448 logger('check_form_security_token failed: user ' . $a->user['guid'] . ' - form element ' . $typename);
449 logger('check_form_security_token failed: _REQUEST data: ' . print_r($_REQUEST, true), LOGGER_DATA);
450 header('HTTP/1.1 403 Forbidden');
455 // Returns an array of group id's this contact is a member of.
456 // This array will only contain group id's related to the uid of this
457 // DFRN contact. They are *not* neccessarily unique across the entire site.
460 if (! function_exists('init_groups_visitor')) {
461 function init_groups_visitor($contact_id) {
463 $r = q("SELECT `gid` FROM `group_member`
464 WHERE `contact-id` = %d ",
467 if (dbm::is_result($r)) {
469 $groups[] = $rr['gid'];