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);
66 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 $_SESSION['new_member'] = false;
76 if (strlen($a->user['timezone'])) {
77 date_default_timezone_set($a->user['timezone']);
78 $a->timezone = $a->user['timezone'];
81 $master_record = $a->user;
83 if ((x($_SESSION,'submanage')) && intval($_SESSION['submanage'])) {
84 $r = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
85 intval($_SESSION['submanage'])
87 if (dbm::is_result($r)) {
88 $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();
102 $r = q("SELECT `user`.`uid`, `user`.`username`, `user`.`nickname`
104 INNER JOIN `user` ON `manage`.`mid` = `user`.`uid`
105 WHERE `user`.`account_removed` = 0 AND `manage`.`uid` = %d",
106 intval($master_record['uid'])
108 if (dbm::is_result($r)) {
109 $a->identities = array_merge($a->identities,$r);
112 if ($login_initial) {
113 logger('auth_identities: ' . print_r($a->identities,true), LOGGER_DEBUG);
115 if ($login_refresh) {
116 logger('auth_identities refresh: ' . print_r($a->identities,true), LOGGER_DEBUG);
119 $r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` = 1 LIMIT 1",
120 intval($_SESSION['uid']));
121 if (dbm::is_result($r)) {
123 $a->cid = $r[0]['id'];
124 $_SESSION['cid'] = $a->cid;
127 header('X-Account-Management-Status: active; name="' . $a->user['username'] . '"; id="' . $a->user['nickname'] .'"');
129 if ($login_initial || $login_refresh) {
131 q("UPDATE `user` SET `login_date` = '%s' WHERE `uid` = %d",
132 dbesc(datetime_convert()),
133 intval($_SESSION['uid'])
136 // Set the login date for all identities of the user
137 q("UPDATE `user` SET `login_date` = '%s' WHERE `password` = '%s' AND `email` = '%s' AND `account_removed` = 0",
138 dbesc(datetime_convert()),
139 dbesc($master_record['password']),
140 dbesc($master_record['email'])
146 if ($login_initial) {
147 // If the user specified to remember the authentication, then set a cookie
148 // that expires after one week (the default is when the browser is closed).
149 // The cookie will be renewed automatically.
150 // The week ensures that sessions will expire after some inactivity.
151 if ($_SESSION['remember']) {
152 logger('Injecting cookie for remembered user '. $_SESSION['remember_user']['nickname']);
153 new_cookie(604800, $user_record);
154 unset($_SESSION['remember']);
160 if ($login_initial) {
161 call_hooks('logged_in', $a->user);
163 if (($a->module !== 'home') && isset($_SESSION['return_url'])) {
164 goaway(App::get_baseurl() . '/' . $_SESSION['return_url']);
172 function can_write_wall(App $a, $owner) {
174 static $verified = 0;
176 if ((! (local_user())) && (! (remote_user()))) {
182 if (($uid) && ($uid == $owner)) {
188 // use remembered decision and avoid a DB lookup for each and every display item
189 // DO NOT use this function if there are going to be multiple owners
191 // We have a contact-id for an authenticated remote user, this block determines if the contact
192 // belongs to this page owner, and has the necessary permissions to post content
194 if ($verified === 2) {
196 } elseif ($verified === 1) {
201 if (is_array($_SESSION['remote'])) {
202 foreach ($_SESSION['remote'] as $visitor) {
203 if ($visitor['uid'] == $owner) {
204 $cid = $visitor['cid'];
214 $r = q("SELECT `contact`.*, `user`.`page-flags` FROM `contact` INNER JOIN `user` on `user`.`uid` = `contact`.`uid`
215 WHERE `contact`.`uid` = %d AND `contact`.`id` = %d AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
216 AND `user`.`blockwall` = 0 AND `readonly` = 0 AND ( `contact`.`rel` IN ( %d , %d ) OR `user`.`page-flags` = %d ) LIMIT 1",
219 intval(CONTACT_IS_SHARING),
220 intval(CONTACT_IS_FRIEND),
221 intval(PAGE_COMMUNITY)
224 if (dbm::is_result($r)) {
238 function permissions_sql($owner_id, $remote_verified = false, $groups = null) {
240 $local_user = local_user();
241 $remote_user = remote_user();
244 * Construct permissions
246 * default permissions - anonymous user
248 $sql = " AND allow_cid = ''
255 * Profile owner - everything is visible
258 if (($local_user) && ($local_user == $owner_id)) {
260 } elseif ($remote_user) {
262 * Authenticated visitor. Unless pre-verified,
263 * check that the contact belongs to this $owner_id
264 * and load the groups the visitor belongs to.
265 * If pre-verified, the caller is expected to have already
266 * done this and passed the groups into this function.
269 if (! $remote_verified) {
270 $r = q("SELECT id FROM contact WHERE id = %d AND uid = %d AND blocked = 0 LIMIT 1",
271 intval($remote_user),
274 if (dbm::is_result($r)) {
275 $remote_verified = true;
276 $groups = init_groups_visitor($remote_user);
279 if ($remote_verified) {
281 $gs = '<<>>'; // should be impossible to match
283 if (is_array($groups) && count($groups)) {
284 foreach ($groups as $g)
285 $gs .= '|<' . intval($g) . '>';
289 * @TODO old-lost code found?
291 " AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' )
292 AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' )
293 AND ( allow_gid = '' OR allow_gid REGEXP '%s' )
294 AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s')
296 intval($remote_user),
297 intval($remote_user),
303 " AND ( NOT (deny_cid REGEXP '<%d>' OR deny_gid REGEXP '%s')
304 AND ( allow_cid REGEXP '<%d>' OR allow_gid REGEXP '%s' OR ( allow_cid = '' AND allow_gid = '') )
307 intval($remote_user),
309 intval($remote_user),
318 function item_permissions_sql($owner_id, $remote_verified = false, $groups = null) {
320 $local_user = local_user();
321 $remote_user = remote_user();
324 * Construct permissions
326 * default permissions - anonymous user
328 $sql = " AND `item`.allow_cid = ''
329 AND `item`.allow_gid = ''
330 AND `item`.deny_cid = ''
331 AND `item`.deny_gid = ''
332 AND `item`.private = 0
336 * Profile owner - everything is visible
338 if ($local_user && ($local_user == $owner_id)) {
340 } elseif ($remote_user) {
342 * Authenticated visitor. Unless pre-verified,
343 * check that the contact belongs to this $owner_id
344 * and load the groups the visitor belongs to.
345 * If pre-verified, the caller is expected to have already
346 * done this and passed the groups into this function.
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) . '>';
369 /*" AND ( private = 0 OR ( private in (1,2) AND wall = 1 AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' )
370 AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' )
371 AND ( allow_gid = '' OR allow_gid REGEXP '%s' )
372 AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s')))
374 intval($remote_user),
375 intval($remote_user),
379 " AND ( `item`.private = 0 OR ( `item`.private in (1,2) AND `item`.`wall` = 1
380 AND ( NOT (`item`.deny_cid REGEXP '<%d>' OR `item`.deny_gid REGEXP '%s')
381 AND ( `item`.allow_cid REGEXP '<%d>' OR `item`.allow_gid REGEXP '%s' OR ( `item`.allow_cid = '' AND `item`.allow_gid = '')))))
383 intval($remote_user),
385 intval($remote_user),
396 * Functions used to protect against Cross-Site Request Forgery
397 * 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.
398 * In this implementation, a security token is reusable (if the user submits a form, goes back and resubmits the form, maybe with small changes;
399 * or if the security token is used for ajax-calls that happen several times), but only valid for a certain amout of time (3hours).
400 * The "typename" seperates the security tokens of different types of forms. This could be relevant in the following case:
401 * A security token is used to protekt a link from CSRF (e.g. the "delete this profile"-link).
402 * If the new page contains by any chance external elements, then the used security token is exposed by the referrer.
403 * Actually, important actions should not be triggered by Links / GET-Requests at all, but somethimes they still are,
404 * 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).
406 function get_form_security_token($typename = '') {
410 $sec_hash = hash('whirlpool', $a->user['guid'] . $a->user['prvkey'] . session_id() . $timestamp . $typename);
412 return $timestamp . '.' . $sec_hash;
415 function check_form_security_token($typename = '', $formname = 'form_security_token') {
416 if (!x($_REQUEST, $formname)) {
420 /// @TODO Careful, not secured!
421 $hash = $_REQUEST[$formname];
423 $max_livetime = 10800; // 3 hours
427 $x = explode('.', $hash);
428 if (time() > (IntVal($x[0]) + $max_livetime)) {
432 $sec_hash = hash('whirlpool', $a->user['guid'] . $a->user['prvkey'] . session_id() . $x[0] . $typename);
434 return ($sec_hash == $x[1]);
437 function check_form_security_std_err_msg() {
438 return t('The form security token was not correct. This probably happened because the form has been opened for too long (>3 hours) before submitting it.') . EOL;
440 function check_form_security_token_redirectOnErr($err_redirect, $typename = '', $formname = 'form_security_token') {
441 if (!check_form_security_token($typename, $formname)) {
443 logger('check_form_security_token failed: user ' . $a->user['guid'] . ' - form element ' . $typename);
444 logger('check_form_security_token failed: _REQUEST data: ' . print_r($_REQUEST, true), LOGGER_DATA);
445 notice( check_form_security_std_err_msg() );
446 goaway(App::get_baseurl() . $err_redirect );
449 function check_form_security_token_ForbiddenOnErr($typename = '', $formname = 'form_security_token') {
450 if (!check_form_security_token($typename, $formname)) {
452 logger('check_form_security_token failed: user ' . $a->user['guid'] . ' - form element ' . $typename);
453 logger('check_form_security_token failed: _REQUEST data: ' . print_r($_REQUEST, true), LOGGER_DATA);
454 header('HTTP/1.1 403 Forbidden');
459 // Returns an array of group id's this contact is a member of.
460 // This array will only contain group id's related to the uid of this
461 // DFRN contact. They are *not* neccessarily unique across the entire site.
464 if (! function_exists('init_groups_visitor')) {
465 function init_groups_visitor($contact_id) {
467 $r = q("SELECT `gid` FROM `group_member`
468 WHERE `contact-id` = %d ",
471 if (dbm::is_result($r)) {
473 $groups[] = $rr['gid'];