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();
28 $value = json_encode(array("uid" => $user["uid"],
29 "hash" => cookie_hash($user),
30 "ip" => $_SERVER['REMOTE_ADDR']));
34 setcookie("Friendica", $value, $time, "/", "",
35 (get_config('system', 'ssl_policy') == SSL_POLICY_FULL), true);
39 function authenticate_success($user_record, $login_initial = false, $interactive = false, $login_refresh = false) {
43 $_SESSION['uid'] = $user_record['uid'];
44 $_SESSION['theme'] = $user_record['theme'];
45 $_SESSION['mobile-theme'] = get_pconfig($user_record['uid'], 'system', 'mobile_theme');
46 $_SESSION['authenticated'] = 1;
47 $_SESSION['page_flags'] = $user_record['page-flags'];
48 $_SESSION['my_url'] = App::get_baseurl() . '/profile/' . $user_record['nickname'];
49 $_SESSION['my_address'] = $user_record['nickname'] . '@' . substr(App::get_baseurl(),strpos(App::get_baseurl(),'://')+3);
50 $_SESSION['addr'] = $_SERVER['REMOTE_ADDR'];
52 $a->user = $user_record;
55 if($a->user['login_date'] === '0000-00-00 00:00:00') {
56 $_SESSION['return_url'] = 'profile_photo/new';
57 $a->module = 'profile_photo';
58 info( t("Welcome ") . $a->user['username'] . EOL);
59 info( t('Please upload a profile photo.') . EOL);
62 info( t("Welcome back ") . $a->user['username'] . EOL);
65 $member_since = strtotime($a->user['register_date']);
66 if(time() < ($member_since + ( 60 * 60 * 24 * 14)))
67 $_SESSION['new_member'] = true;
69 $_SESSION['new_member'] = false;
70 if(strlen($a->user['timezone'])) {
71 date_default_timezone_set($a->user['timezone']);
72 $a->timezone = $a->user['timezone'];
75 $master_record = $a->user;
77 if((x($_SESSION,'submanage')) && intval($_SESSION['submanage'])) {
78 $r = q("select * from user where uid = %d limit 1",
79 intval($_SESSION['submanage'])
81 if (dbm::is_result($r))
82 $master_record = $r[0];
85 $r = q("SELECT `uid`,`username`,`nickname` FROM `user` WHERE `password` = '%s' AND `email` = '%s' AND `account_removed` = 0 ",
86 dbesc($master_record['password']),
87 dbesc($master_record['email'])
89 if (dbm::is_result($r))
92 $a->identities = array();
94 $r = q("select `user`.`uid`, `user`.`username`, `user`.`nickname`
95 from manage INNER JOIN user on manage.mid = user.uid where `user`.`account_removed` = 0
96 and `manage`.`uid` = %d",
97 intval($master_record['uid'])
99 if (dbm::is_result($r))
100 $a->identities = array_merge($a->identities,$r);
103 logger('auth_identities: ' . print_r($a->identities,true), LOGGER_DEBUG);
105 logger('auth_identities refresh: ' . print_r($a->identities,true), LOGGER_DEBUG);
107 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` = 1 LIMIT 1",
108 intval($_SESSION['uid']));
109 if (dbm::is_result($r)) {
111 $a->cid = $r[0]['id'];
112 $_SESSION['cid'] = $a->cid;
115 header('X-Account-Management-Status: active; name="' . $a->user['username'] . '"; id="' . $a->user['nickname'] .'"');
117 if($login_initial || $login_refresh) {
119 q("UPDATE `user` SET `login_date` = '%s' WHERE `uid` = %d",
120 dbesc(datetime_convert()),
121 intval($_SESSION['uid'])
124 // Set the login date for all identities of the user
125 q("UPDATE `user` SET `login_date` = '%s' WHERE `password` = '%s' AND `email` = '%s' AND `account_removed` = 0",
126 dbesc(datetime_convert()),
127 dbesc($master_record['password']),
128 dbesc($master_record['email'])
134 if ($login_initial) {
135 // If the user specified to remember the authentication, then set a cookie
136 // that expires after one week (the default is when the browser is closed).
137 // The cookie will be renewed automatically.
138 // The week ensures that sessions will expire after some inactivity.
139 if ($_SESSION['remember']) {
140 logger('Injecting cookie for remembered user '. $_SESSION['remember_user']['nickname']);
141 new_cookie(604800, $user_record);
142 unset($_SESSION['remember']);
148 if ($login_initial) {
149 call_hooks('logged_in', $a->user);
151 if (($a->module !== 'home') && isset($_SESSION['return_url'])) {
152 goaway(App::get_baseurl() . '/' . $_SESSION['return_url']);
160 function can_write_wall(App $a, $owner) {
162 static $verified = 0;
164 if ((! (local_user())) && (! (remote_user()))) {
170 if (($uid) && ($uid == $owner)) {
176 // use remembered decision and avoid a DB lookup for each and every display item
177 // DO NOT use this function if there are going to be multiple owners
179 // We have a contact-id for an authenticated remote user, this block determines if the contact
180 // belongs to this page owner, and has the necessary permissions to post content
182 if ($verified === 2) {
184 } elseif ($verified === 1) {
189 if (is_array($_SESSION['remote'])) {
190 foreach ($_SESSION['remote'] as $visitor) {
191 if ($visitor['uid'] == $owner) {
192 $cid = $visitor['cid'];
202 $r = q("SELECT `contact`.*, `user`.`page-flags` FROM `contact` INNER JOIN `user` on `user`.`uid` = `contact`.`uid`
203 WHERE `contact`.`uid` = %d AND `contact`.`id` = %d AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
204 AND `user`.`blockwall` = 0 AND `readonly` = 0 AND ( `contact`.`rel` IN ( %d , %d ) OR `user`.`page-flags` = %d ) LIMIT 1",
207 intval(CONTACT_IS_SHARING),
208 intval(CONTACT_IS_FRIEND),
209 intval(PAGE_COMMUNITY)
212 if (dbm::is_result($r)) {
226 function permissions_sql($owner_id,$remote_verified = false,$groups = null) {
228 $local_user = local_user();
229 $remote_user = remote_user();
232 * Construct permissions
234 * default permissions - anonymous user
237 $sql = " AND allow_cid = ''
244 * Profile owner - everything is visible
247 if(($local_user) && ($local_user == $owner_id)) {
252 * Authenticated visitor. Unless pre-verified,
253 * check that the contact belongs to this $owner_id
254 * and load the groups the visitor belongs to.
255 * If pre-verified, the caller is expected to have already
256 * done this and passed the groups into this function.
259 elseif($remote_user) {
261 if(! $remote_verified) {
262 $r = q("SELECT id FROM contact WHERE id = %d AND uid = %d AND blocked = 0 LIMIT 1",
263 intval($remote_user),
266 if (dbm::is_result($r)) {
267 $remote_verified = true;
268 $groups = init_groups_visitor($remote_user);
271 if($remote_verified) {
273 $gs = '<<>>'; // should be impossible to match
275 if(is_array($groups) && count($groups)) {
276 foreach($groups as $g)
277 $gs .= '|<' . intval($g) . '>';
281 " AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' )
282 AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' )
283 AND ( allow_gid = '' OR allow_gid REGEXP '%s' )
284 AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s')
286 intval($remote_user),
287 intval($remote_user),
292 " AND ( NOT (deny_cid REGEXP '<%d>' OR deny_gid REGEXP '%s')
293 AND ( allow_cid REGEXP '<%d>' OR allow_gid REGEXP '%s' OR ( allow_cid = '' AND allow_gid = '') )
296 intval($remote_user),
298 intval($remote_user),
307 function item_permissions_sql($owner_id,$remote_verified = false,$groups = null) {
309 $local_user = local_user();
310 $remote_user = remote_user();
313 * Construct permissions
315 * default permissions - anonymous user
318 $sql = " AND `item`.allow_cid = ''
319 AND `item`.allow_gid = ''
320 AND `item`.deny_cid = ''
321 AND `item`.deny_gid = ''
322 AND `item`.private = 0
326 * Profile owner - everything is visible
329 if($local_user && ($local_user == $owner_id)) {
334 * Authenticated visitor. Unless pre-verified,
335 * check that the contact belongs to this $owner_id
336 * and load the groups the visitor belongs to.
337 * If pre-verified, the caller is expected to have already
338 * done this and passed the groups into this function.
341 elseif($remote_user) {
343 if(! $remote_verified) {
344 $r = q("SELECT id FROM contact WHERE id = %d AND uid = %d AND blocked = 0 LIMIT 1",
345 intval($remote_user),
348 if (dbm::is_result($r)) {
349 $remote_verified = true;
350 $groups = init_groups_visitor($remote_user);
353 if($remote_verified) {
355 $gs = '<<>>'; // should be impossible to match
357 if(is_array($groups) && count($groups)) {
358 foreach($groups as $g)
359 $gs .= '|<' . intval($g) . '>';
363 /*" AND ( private = 0 OR ( private in (1,2) AND wall = 1 AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' )
364 AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' )
365 AND ( allow_gid = '' OR allow_gid REGEXP '%s' )
366 AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s')))
368 intval($remote_user),
369 intval($remote_user),
373 " AND ( `item`.private = 0 OR ( `item`.private in (1,2) AND `item`.`wall` = 1
374 AND ( NOT (`item`.deny_cid REGEXP '<%d>' OR `item`.deny_gid REGEXP '%s')
375 AND ( `item`.allow_cid REGEXP '<%d>' OR `item`.allow_gid REGEXP '%s' OR ( `item`.allow_cid = '' AND `item`.allow_gid = '')))))
377 intval($remote_user),
379 intval($remote_user),
390 * Functions used to protect against Cross-Site Request Forgery
391 * 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.
392 * In this implementation, a security token is reusable (if the user submits a form, goes back and resubmits the form, maybe with small changes;
393 * or if the security token is used for ajax-calls that happen several times), but only valid for a certain amout of time (3hours).
394 * The "typename" seperates the security tokens of different types of forms. This could be relevant in the following case:
395 * A security token is used to protekt a link from CSRF (e.g. the "delete this profile"-link).
396 * If the new page contains by any chance external elements, then the used security token is exposed by the referrer.
397 * Actually, important actions should not be triggered by Links / GET-Requests at all, but somethimes they still are,
398 * 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).
400 function get_form_security_token($typename = '') {
404 $sec_hash = hash('whirlpool', $a->user['guid'] . $a->user['prvkey'] . session_id() . $timestamp . $typename);
406 return $timestamp . '.' . $sec_hash;
409 function check_form_security_token($typename = '', $formname = 'form_security_token') {
410 if (!x($_REQUEST, $formname)) return false;
411 $hash = $_REQUEST[$formname];
413 $max_livetime = 10800; // 3 hours
417 $x = explode('.', $hash);
418 if (time() > (IntVal($x[0]) + $max_livetime)) return false;
420 $sec_hash = hash('whirlpool', $a->user['guid'] . $a->user['prvkey'] . session_id() . $x[0] . $typename);
422 return ($sec_hash == $x[1]);
425 function check_form_security_std_err_msg() {
426 return t('The form security token was not correct. This probably happened because the form has been opened for too long (>3 hours) before submitting it.') . EOL;
428 function check_form_security_token_redirectOnErr($err_redirect, $typename = '', $formname = 'form_security_token') {
429 if (!check_form_security_token($typename, $formname)) {
431 logger('check_form_security_token failed: user ' . $a->user['guid'] . ' - form element ' . $typename);
432 logger('check_form_security_token failed: _REQUEST data: ' . print_r($_REQUEST, true), LOGGER_DATA);
433 notice( check_form_security_std_err_msg() );
434 goaway(App::get_baseurl() . $err_redirect );
437 function check_form_security_token_ForbiddenOnErr($typename = '', $formname = 'form_security_token') {
438 if (!check_form_security_token($typename, $formname)) {
440 logger('check_form_security_token failed: user ' . $a->user['guid'] . ' - form element ' . $typename);
441 logger('check_form_security_token failed: _REQUEST data: ' . print_r($_REQUEST, true), LOGGER_DATA);
442 header('HTTP/1.1 403 Forbidden');
447 // Returns an array of group id's this contact is a member of.
448 // This array will only contain group id's related to the uid of this
449 // DFRN contact. They are *not* neccessarily unique across the entire site.
452 if(! function_exists('init_groups_visitor')) {
453 function init_groups_visitor($contact_id) {
455 $r = q("SELECT `gid` FROM `group_member`
456 WHERE `contact-id` = %d ",
459 if (dbm::is_result($r)) {
461 $groups[] = $rr['gid'];