4 use Friendica\Core\Config;
5 use Friendica\Core\PConfig;
6 use Friendica\Core\System;
9 * @brief Calculate the hash that is needed for the "Friendica" cookie
11 * @param array $user Record from "user" table
13 * @return string Hashed data
15 function cookie_hash($user) {
16 return(hash("sha256", Config::get("system", "site_prvkey").
22 * @brief Set the "Friendica" cookie
25 * @param array $user Record from "user" table
27 function new_cookie($time, $user = array()) {
30 $time = $time + time();
34 $value = json_encode(array("uid" => $user["uid"],
35 "hash" => cookie_hash($user),
36 "ip" => $_SERVER['REMOTE_ADDR']));
42 setcookie("Friendica", $value, $time, "/", "",
43 (Config::get('system', 'ssl_policy') == SSL_POLICY_FULL), true);
47 function authenticate_success($user_record, $login_initial = false, $interactive = false, $login_refresh = false) {
51 $_SESSION['uid'] = $user_record['uid'];
52 $_SESSION['theme'] = $user_record['theme'];
53 $_SESSION['mobile-theme'] = PConfig::get($user_record['uid'], 'system', 'mobile_theme');
54 $_SESSION['authenticated'] = 1;
55 $_SESSION['page_flags'] = $user_record['page-flags'];
56 $_SESSION['my_url'] = System::baseUrl() . '/profile/' . $user_record['nickname'];
57 $_SESSION['my_address'] = $user_record['nickname'] . '@' . substr(System::baseUrl(),strpos(System::baseUrl(),'://')+3);
58 $_SESSION['addr'] = $_SERVER['REMOTE_ADDR'];
60 $a->user = $user_record;
63 if ($a->user['login_date'] <= NULL_DATE) {
64 $_SESSION['return_url'] = 'profile_photo/new';
65 $a->module = 'profile_photo';
66 info( t("Welcome ") . $a->user['username'] . EOL);
67 info( t('Please upload a profile photo.') . EOL);
69 info( t("Welcome back ") . $a->user['username'] . EOL);
73 $member_since = strtotime($a->user['register_date']);
74 if (time() < ($member_since + ( 60 * 60 * 24 * 14))) {
75 $_SESSION['new_member'] = true;
77 $_SESSION['new_member'] = false;
79 if (strlen($a->user['timezone'])) {
80 date_default_timezone_set($a->user['timezone']);
81 $a->timezone = $a->user['timezone'];
84 $master_record = $a->user;
86 if ((x($_SESSION,'submanage')) && intval($_SESSION['submanage'])) {
87 $r = dba::fetch_first("SELECT * FROM `user` WHERE `uid` = ? LIMIT 1",
88 intval($_SESSION['submanage'])
90 if (dbm::is_result($r)) {
95 $r = dba::select('user', array('uid', 'username', 'nickname'),
96 array('password' => $master_record['password'], 'email' => $master_record['email'], 'account_removed' => false));
97 if (dbm::is_result($r)) {
98 $a->identities = dba::inArray($r);
100 $a->identities = array();
103 $r = dba::p("SELECT `user`.`uid`, `user`.`username`, `user`.`nickname`
105 INNER JOIN `user` ON `manage`.`mid` = `user`.`uid`
106 WHERE `user`.`account_removed` = 0 AND `manage`.`uid` = ?",
107 $master_record['uid']
109 if (dbm::is_result($r)) {
110 $a->identities = array_merge($a->identities, dba::inArray($r));
113 if ($login_initial) {
114 logger('auth_identities: ' . print_r($a->identities,true), LOGGER_DEBUG);
116 if ($login_refresh) {
117 logger('auth_identities refresh: ' . print_r($a->identities,true), LOGGER_DEBUG);
120 $r = dba::fetch_first("SELECT * FROM `contact` WHERE `uid` = ? AND `self` LIMIT 1", $_SESSION['uid']);
121 if (dbm::is_result($r)) {
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) {
130 dba::update('user', array('login_date' => datetime_convert()), array('uid' => $_SESSION['uid']));
132 // Set the login date for all identities of the user
133 dba::update('user', array('login_date' => datetime_convert()),
134 array('password' => $master_record['password'], 'email' => $master_record['email'], 'account_removed' => false));
137 if ($login_initial) {
138 // If the user specified to remember the authentication, then set a cookie
139 // that expires after one week (the default is when the browser is closed).
140 // The cookie will be renewed automatically.
141 // The week ensures that sessions will expire after some inactivity.
142 if ($_SESSION['remember']) {
143 logger('Injecting cookie for remembered user '. $_SESSION['remember_user']['nickname']);
144 new_cookie(604800, $user_record);
145 unset($_SESSION['remember']);
149 if ($login_initial) {
150 call_hooks('logged_in', $a->user);
152 if (($a->module !== 'home') && isset($_SESSION['return_url'])) {
153 goaway(System::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
236 $sql = " AND allow_cid = ''
243 * Profile owner - everything is visible
246 if (($local_user) && ($local_user == $owner_id)) {
248 } elseif ($remote_user) {
250 * Authenticated visitor. Unless pre-verified,
251 * check that the contact belongs to this $owner_id
252 * and load the groups the visitor belongs to.
253 * If pre-verified, the caller is expected to have already
254 * done this and passed the groups into this function.
257 if (! $remote_verified) {
258 $r = q("SELECT id FROM contact WHERE id = %d AND uid = %d AND blocked = 0 LIMIT 1",
259 intval($remote_user),
262 if (dbm::is_result($r)) {
263 $remote_verified = true;
264 $groups = init_groups_visitor($remote_user);
267 if ($remote_verified) {
269 $gs = '<<>>'; // should be impossible to match
271 if (is_array($groups) && count($groups)) {
272 foreach ($groups as $g)
273 $gs .= '|<' . intval($g) . '>';
277 * @TODO old-lost code found?
279 " AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' )
280 AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' )
281 AND ( allow_gid = '' OR allow_gid REGEXP '%s' )
282 AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s')
284 intval($remote_user),
285 intval($remote_user),
291 " AND ( NOT (deny_cid REGEXP '<%d>' OR deny_gid REGEXP '%s')
292 AND ( allow_cid REGEXP '<%d>' OR allow_gid REGEXP '%s' OR ( allow_cid = '' AND allow_gid = '') )
295 intval($remote_user),
297 intval($remote_user),
306 function item_permissions_sql($owner_id, $remote_verified = false, $groups = null) {
308 $local_user = local_user();
309 $remote_user = remote_user();
312 * Construct permissions
314 * default permissions - anonymous user
316 $sql = " AND `item`.allow_cid = ''
317 AND `item`.allow_gid = ''
318 AND `item`.deny_cid = ''
319 AND `item`.deny_gid = ''
320 AND `item`.private = 0
324 * Profile owner - everything is visible
326 if ($local_user && ($local_user == $owner_id)) {
328 } elseif ($remote_user) {
330 * Authenticated visitor. Unless pre-verified,
331 * check that the contact belongs to this $owner_id
332 * and load the groups the visitor belongs to.
333 * If pre-verified, the caller is expected to have already
334 * done this and passed the groups into this function.
336 if (! $remote_verified) {
337 $r = q("SELECT id FROM contact WHERE id = %d AND uid = %d AND blocked = 0 LIMIT 1",
338 intval($remote_user),
341 if (dbm::is_result($r)) {
342 $remote_verified = true;
343 $groups = init_groups_visitor($remote_user);
346 if ($remote_verified) {
348 $gs = '<<>>'; // should be impossible to match
350 if (is_array($groups) && count($groups)) {
351 foreach ($groups as $g) {
352 $gs .= '|<' . intval($g) . '>';
357 /*" AND ( private = 0 OR ( private in (1,2) AND wall = 1 AND ( allow_cid = '' OR allow_cid REGEXP '<%d>' )
358 AND ( deny_cid = '' OR NOT deny_cid REGEXP '<%d>' )
359 AND ( allow_gid = '' OR allow_gid REGEXP '%s' )
360 AND ( deny_gid = '' OR NOT deny_gid REGEXP '%s')))
362 intval($remote_user),
363 intval($remote_user),
367 " AND ( `item`.private = 0 OR ( `item`.private in (1,2) AND `item`.`wall` = 1
368 AND ( NOT (`item`.deny_cid REGEXP '<%d>' OR `item`.deny_gid REGEXP '%s')
369 AND ( `item`.allow_cid REGEXP '<%d>' OR `item`.allow_gid REGEXP '%s' OR ( `item`.allow_cid = '' AND `item`.allow_gid = '')))))
371 intval($remote_user),
373 intval($remote_user),
384 * Functions used to protect against Cross-Site Request Forgery
385 * 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.
386 * In this implementation, a security token is reusable (if the user submits a form, goes back and resubmits the form, maybe with small changes;
387 * or if the security token is used for ajax-calls that happen several times), but only valid for a certain amout of time (3hours).
388 * The "typename" seperates the security tokens of different types of forms. This could be relevant in the following case:
389 * A security token is used to protekt a link from CSRF (e.g. the "delete this profile"-link).
390 * If the new page contains by any chance external elements, then the used security token is exposed by the referrer.
391 * Actually, important actions should not be triggered by Links / GET-Requests at all, but somethimes they still are,
392 * 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).
394 function get_form_security_token($typename = '') {
398 $sec_hash = hash('whirlpool', $a->user['guid'] . $a->user['prvkey'] . session_id() . $timestamp . $typename);
400 return $timestamp . '.' . $sec_hash;
403 function check_form_security_token($typename = '', $formname = 'form_security_token') {
404 if (!x($_REQUEST, $formname)) {
408 /// @TODO Careful, not secured!
409 $hash = $_REQUEST[$formname];
411 $max_livetime = 10800; // 3 hours
415 $x = explode('.', $hash);
416 if (time() > (IntVal($x[0]) + $max_livetime)) {
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(System::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'];