6 * @brief Calculate the hash that is needed for the "Friendica" cookie
8 * @param array $user Record from "user" table
10 * @return string Hashed data
12 function cookie_hash($user) {
13 return(hash("sha256", get_config("system", "site_prvkey").
19 * @brief Set the "Friendica" cookie
22 * @param array $user Record from "user" table
24 function new_cookie($time, $user = array()) {
27 $time = $time + time();
31 $value = json_encode(array("uid" => $user["uid"],
32 "hash" => cookie_hash($user),
33 "ip" => $_SERVER['REMOTE_ADDR']));
39 setcookie("Friendica", $value, $time, "/", "",
40 (get_config('system', 'ssl_policy') == SSL_POLICY_FULL), true);
44 function authenticate_success($user_record, $login_initial = false, $interactive = false, $login_refresh = false) {
48 $_SESSION['uid'] = $user_record['uid'];
49 $_SESSION['theme'] = $user_record['theme'];
50 $_SESSION['mobile-theme'] = get_pconfig($user_record['uid'], 'system', 'mobile_theme');
51 $_SESSION['authenticated'] = 1;
52 $_SESSION['page_flags'] = $user_record['page-flags'];
53 $_SESSION['my_url'] = App::get_baseurl() . '/profile/' . $user_record['nickname'];
54 $_SESSION['my_address'] = $user_record['nickname'] . '@' . substr(App::get_baseurl(),strpos(App::get_baseurl(),'://')+3);
55 $_SESSION['addr'] = $_SERVER['REMOTE_ADDR'];
57 $a->user = $user_record;
60 if ($a->user['login_date'] <= NULL_DATE) {
61 $_SESSION['return_url'] = 'profile_photo/new';
62 $a->module = 'profile_photo';
63 info( t("Welcome ") . $a->user['username'] . EOL);
64 info( t('Please upload a profile photo.') . EOL);
67 info( t("Welcome back ") . $a->user['username'] . EOL);
70 $member_since = strtotime($a->user['register_date']);
71 if(time() < ($member_since + ( 60 * 60 * 24 * 14)))
72 $_SESSION['new_member'] = true;
74 $_SESSION['new_member'] = false;
75 if(strlen($a->user['timezone'])) {
76 date_default_timezone_set($a->user['timezone']);
77 $a->timezone = $a->user['timezone'];
80 $master_record = $a->user;
82 if((x($_SESSION,'submanage')) && intval($_SESSION['submanage'])) {
83 $r = q("select * from user where uid = %d limit 1",
84 intval($_SESSION['submanage'])
86 if (dbm::is_result($r))
87 $master_record = $r[0];
90 $r = q("SELECT `uid`,`username`,`nickname` FROM `user` WHERE `password` = '%s' AND `email` = '%s' AND `account_removed` = 0 ",
91 dbesc($master_record['password']),
92 dbesc($master_record['email'])
94 if (dbm::is_result($r))
97 $a->identities = array();
99 $r = q("select `user`.`uid`, `user`.`username`, `user`.`nickname`
100 from manage INNER JOIN user on manage.mid = user.uid where `user`.`account_removed` = 0
101 and `manage`.`uid` = %d",
102 intval($master_record['uid'])
104 if (dbm::is_result($r))
105 $a->identities = array_merge($a->identities,$r);
108 logger('auth_identities: ' . print_r($a->identities,true), LOGGER_DEBUG);
110 logger('auth_identities refresh: ' . print_r($a->identities,true), LOGGER_DEBUG);
112 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` = 1 LIMIT 1",
113 intval($_SESSION['uid']));
114 if (dbm::is_result($r)) {
116 $a->cid = $r[0]['id'];
117 $_SESSION['cid'] = $a->cid;
120 header('X-Account-Management-Status: active; name="' . $a->user['username'] . '"; id="' . $a->user['nickname'] .'"');
122 if($login_initial || $login_refresh) {
124 q("UPDATE `user` SET `login_date` = '%s' WHERE `uid` = %d",
125 dbesc(datetime_convert()),
126 intval($_SESSION['uid'])
129 // Set the login date for all identities of the user
130 q("UPDATE `user` SET `login_date` = '%s' WHERE `password` = '%s' AND `email` = '%s' AND `account_removed` = 0",
131 dbesc(datetime_convert()),
132 dbesc($master_record['password']),
133 dbesc($master_record['email'])
139 if ($login_initial) {
140 // If the user specified to remember the authentication, then set a cookie
141 // that expires after one week (the default is when the browser is closed).
142 // The cookie will be renewed automatically.
143 // The week ensures that sessions will expire after some inactivity.
144 if ($_SESSION['remember']) {
145 logger('Injecting cookie for remembered user '. $_SESSION['remember_user']['nickname']);
146 new_cookie(604800, $user_record);
147 unset($_SESSION['remember']);
153 if ($login_initial) {
154 call_hooks('logged_in', $a->user);
156 if (($a->module !== 'home') && isset($_SESSION['return_url'])) {
157 goaway(App::get_baseurl() . '/' . $_SESSION['return_url']);
165 function can_write_wall(App $a, $owner) {
167 static $verified = 0;
169 if ((! (local_user())) && (! (remote_user()))) {
175 if (($uid) && ($uid == $owner)) {
181 // use remembered decision and avoid a DB lookup for each and every display item
182 // DO NOT use this function if there are going to be multiple owners
184 // We have a contact-id for an authenticated remote user, this block determines if the contact
185 // belongs to this page owner, and has the necessary permissions to post content
187 if ($verified === 2) {
189 } elseif ($verified === 1) {
194 if (is_array($_SESSION['remote'])) {
195 foreach ($_SESSION['remote'] as $visitor) {
196 if ($visitor['uid'] == $owner) {
197 $cid = $visitor['cid'];
207 $r = q("SELECT `contact`.*, `user`.`page-flags` FROM `contact` INNER JOIN `user` on `user`.`uid` = `contact`.`uid`
208 WHERE `contact`.`uid` = %d AND `contact`.`id` = %d AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
209 AND `user`.`blockwall` = 0 AND `readonly` = 0 AND ( `contact`.`rel` IN ( %d , %d ) OR `user`.`page-flags` = %d ) LIMIT 1",
212 intval(CONTACT_IS_SHARING),
213 intval(CONTACT_IS_FRIEND),
214 intval(PAGE_COMMUNITY)
217 if (dbm::is_result($r)) {
231 function permissions_sql($owner_id,$remote_verified = false,$groups = null) {
233 $local_user = local_user();
234 $remote_user = remote_user();
237 * Construct permissions
239 * default permissions - anonymous user
242 $sql = " AND allow_cid = ''
249 * Profile owner - everything is visible
252 if(($local_user) && ($local_user == $owner_id)) {
257 * Authenticated visitor. Unless pre-verified,
258 * check that the contact belongs to this $owner_id
259 * and load the groups the visitor belongs to.
260 * If pre-verified, the caller is expected to have already
261 * done this and passed the groups into this function.
264 elseif($remote_user) {
266 if(! $remote_verified) {
267 $r = q("SELECT id FROM contact WHERE id = %d AND uid = %d AND blocked = 0 LIMIT 1",
268 intval($remote_user),
271 if (dbm::is_result($r)) {
272 $remote_verified = true;
273 $groups = init_groups_visitor($remote_user);
276 if($remote_verified) {
278 $gs = '<<>>'; // should be impossible to match
280 if(is_array($groups) && count($groups)) {
281 foreach($groups as $g)
282 $gs .= '|<' . intval($g) . '>';
286 " AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' )
287 AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' )
288 AND ( allow_gid = '' OR allow_gid REGEXP '%s' )
289 AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s')
291 intval($remote_user),
292 intval($remote_user),
297 " AND ( NOT (deny_cid REGEXP '<%d>' OR deny_gid REGEXP '%s')
298 AND ( allow_cid REGEXP '<%d>' OR allow_gid REGEXP '%s' OR ( allow_cid = '' AND allow_gid = '') )
301 intval($remote_user),
303 intval($remote_user),
312 function item_permissions_sql($owner_id,$remote_verified = false,$groups = null) {
314 $local_user = local_user();
315 $remote_user = remote_user();
318 * Construct permissions
320 * default permissions - anonymous user
323 $sql = " AND `item`.allow_cid = ''
324 AND `item`.allow_gid = ''
325 AND `item`.deny_cid = ''
326 AND `item`.deny_gid = ''
327 AND `item`.private = 0
331 * Profile owner - everything is visible
334 if($local_user && ($local_user == $owner_id)) {
339 * Authenticated visitor. Unless pre-verified,
340 * check that the contact belongs to this $owner_id
341 * and load the groups the visitor belongs to.
342 * If pre-verified, the caller is expected to have already
343 * done this and passed the groups into this function.
346 elseif($remote_user) {
348 if(! $remote_verified) {
349 $r = q("SELECT id FROM contact WHERE id = %d AND uid = %d AND blocked = 0 LIMIT 1",
350 intval($remote_user),
353 if (dbm::is_result($r)) {
354 $remote_verified = true;
355 $groups = init_groups_visitor($remote_user);
358 if($remote_verified) {
360 $gs = '<<>>'; // should be impossible to match
362 if(is_array($groups) && count($groups)) {
363 foreach($groups as $g)
364 $gs .= '|<' . intval($g) . '>';
368 /*" AND ( private = 0 OR ( private in (1,2) AND wall = 1 AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' )
369 AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' )
370 AND ( allow_gid = '' OR allow_gid REGEXP '%s' )
371 AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s')))
373 intval($remote_user),
374 intval($remote_user),
378 " AND ( `item`.private = 0 OR ( `item`.private in (1,2) AND `item`.`wall` = 1
379 AND ( NOT (`item`.deny_cid REGEXP '<%d>' OR `item`.deny_gid REGEXP '%s')
380 AND ( `item`.allow_cid REGEXP '<%d>' OR `item`.allow_gid REGEXP '%s' OR ( `item`.allow_cid = '' AND `item`.allow_gid = '')))))
382 intval($remote_user),
384 intval($remote_user),
395 * Functions used to protect against Cross-Site Request Forgery
396 * 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.
397 * In this implementation, a security token is reusable (if the user submits a form, goes back and resubmits the form, maybe with small changes;
398 * or if the security token is used for ajax-calls that happen several times), but only valid for a certain amout of time (3hours).
399 * The "typename" seperates the security tokens of different types of forms. This could be relevant in the following case:
400 * A security token is used to protekt a link from CSRF (e.g. the "delete this profile"-link).
401 * If the new page contains by any chance external elements, then the used security token is exposed by the referrer.
402 * Actually, important actions should not be triggered by Links / GET-Requests at all, but somethimes they still are,
403 * 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).
405 function get_form_security_token($typename = '') {
409 $sec_hash = hash('whirlpool', $a->user['guid'] . $a->user['prvkey'] . session_id() . $timestamp . $typename);
411 return $timestamp . '.' . $sec_hash;
414 function check_form_security_token($typename = '', $formname = 'form_security_token') {
415 if (!x($_REQUEST, $formname)) return false;
416 $hash = $_REQUEST[$formname];
418 $max_livetime = 10800; // 3 hours
422 $x = explode('.', $hash);
423 if (time() > (IntVal($x[0]) + $max_livetime)) return false;
425 $sec_hash = hash('whirlpool', $a->user['guid'] . $a->user['prvkey'] . session_id() . $x[0] . $typename);
427 return ($sec_hash == $x[1]);
430 function check_form_security_std_err_msg() {
431 return t('The form security token was not correct. This probably happened because the form has been opened for too long (>3 hours) before submitting it.') . EOL;
433 function check_form_security_token_redirectOnErr($err_redirect, $typename = '', $formname = 'form_security_token') {
434 if (!check_form_security_token($typename, $formname)) {
436 logger('check_form_security_token failed: user ' . $a->user['guid'] . ' - form element ' . $typename);
437 logger('check_form_security_token failed: _REQUEST data: ' . print_r($_REQUEST, true), LOGGER_DATA);
438 notice( check_form_security_std_err_msg() );
439 goaway(App::get_baseurl() . $err_redirect );
442 function check_form_security_token_ForbiddenOnErr($typename = '', $formname = 'form_security_token') {
443 if (!check_form_security_token($typename, $formname)) {
445 logger('check_form_security_token failed: user ' . $a->user['guid'] . ' - form element ' . $typename);
446 logger('check_form_security_token failed: _REQUEST data: ' . print_r($_REQUEST, true), LOGGER_DATA);
447 header('HTTP/1.1 403 Forbidden');
452 // Returns an array of group id's this contact is a member of.
453 // This array will only contain group id's related to the uid of this
454 // DFRN contact. They are *not* neccessarily unique across the entire site.
457 if(! function_exists('init_groups_visitor')) {
458 function init_groups_visitor($contact_id) {
460 $r = q("SELECT `gid` FROM `group_member`
461 WHERE `contact-id` = %d ",
464 if (dbm::is_result($r)) {
466 $groups[] = $rr['gid'];