<?php use Friendica\App; use Friendica\Core\L10n; use Friendica\Core\System; use Friendica\Database\DBA; use Friendica\Model\Contact; use Friendica\Model\Profile; function redir_init(App $a) { $url = defaults($_GET, 'url', ''); $quiet = !empty($_GET['quiet']) ? '&quiet=1' : ''; $con_url = defaults($_GET, 'conurl', ''); if ($a->argc > 1 && intval($a->argv[1])) { $cid = intval($a->argv[1]); } elseif (local_user() && !empty($con_url)) { $cid = Contact::getIdForURL($con_url, local_user()); } else { $cid = 0; } if (!empty($cid)) { $fields = ['id', 'uid', 'nurl', 'url', 'addr', 'name', 'network', 'poll', 'issued-id', 'dfrn-id', 'duplex']; $contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => [0, local_user()]]); if (!DBA::isResult($contact)) { notice(L10n::t('Contact not found.')); goaway(System::baseUrl()); } $contact_url = $contact['url']; if ($contact['network'] !== NETWORK_DFRN // Authentication isn't supported for non DFRN contacts. || (!local_user() && !remote_user()) // Visitors (not logged in or not remotes) can't authenticate. || (!empty($a->contact['id']) && $a->contact['id'] == $cid)) // Local user is already authenticated. { goaway($url != '' ? $url : $contact_url); } if ($contact['uid'] == 0 && local_user()) { // Let's have a look if there is an established connection // between the puplic contact we have found and the local user. $contact = DBA::selectFirst('contact', $fields, ['nurl' => $contact['nurl'], 'uid' => local_user()]); if (DBA::isResult($contact)) { $cid = $contact['id']; } if (!empty($a->contact['id']) && $a->contact['id'] == $cid) { // Local user is already authenticated. $target_url = $url != '' ? $url : $contact_url; logger($contact['name'] . " is already authenticated. Redirecting to " . $target_url, LOGGER_DEBUG); goaway($target_url); } } if (remote_user()) { $host = substr(System::baseUrl() . ($a->urlpath ? '/' . $a->urlpath : ''), strpos(System::baseUrl(), '://') + 3); $remotehost = substr($contact['addr'], strpos($contact['addr'], '@') + 1); // On a local instance we have to check if the local user has already authenticated // with the local contact. Otherwise the local user would ask the local contact // for authentification everytime he/she is visiting a profile page of the local // contact. if ($host == $remotehost && x($_SESSION, 'remote') && is_array($_SESSION['remote'])) { foreach ($_SESSION['remote'] as $v) { if ($v['uid'] == $_SESSION['visitor_visiting'] && $v['cid'] == $_SESSION['visitor_id']) { // Remote user is already authenticated. $target_url = $url != '' ? $url : $contact_url; logger($contact['name'] . " is already authenticated. Redirecting to " . $target_url, LOGGER_DEBUG); goaway($target_url); } } } } // Doing remote auth with dfrn. if (local_user()&& (!empty($contact['dfrn-id']) || !empty($contact['issued-id']))) { $dfrn_id = $orig_id = (($contact['issued-id']) ? $contact['issued-id'] : $contact['dfrn-id']); if ($contact['duplex'] && $contact['issued-id']) { $orig_id = $contact['issued-id']; $dfrn_id = '1:' . $orig_id; } if ($contact['duplex'] && $contact['dfrn-id']) { $orig_id = $contact['dfrn-id']; $dfrn_id = '0:' . $orig_id; } $sec = random_string(); $fields = ['uid' => local_user(), 'cid' => $cid, 'dfrn_id' => $dfrn_id, 'sec' => $sec, 'expire' => time() + 45]; DBA::insert('profile_check', $fields); logger('mod_redir: ' . $contact['name'] . ' ' . $sec, LOGGER_DEBUG); $dest = (!empty($url) ? '&destination_url=' . $url : ''); goaway($contact['poll'] . '?dfrn_id=' . $dfrn_id . '&dfrn_version=' . DFRN_PROTOCOL_VERSION . '&type=profile&sec=' . $sec . $dest . $quiet); } $url = $url != '' ? $url : $contact_url; } // If we don't have a connected contact, redirect with // the 'zrl' parameter. if (!empty($url)) { $my_profile = Profile::getMyURL(); if (!empty($my_profile) && !link_compare($my_profile, $url)) { $separator = strpos($url, '?') ? '&' : '?'; $url .= $separator . 'zrl=' . urlencode($my_profile); } logger('redirecting to ' . $url, LOGGER_DEBUG); goaway($url); } notice(L10n::t('Contact not found.')); goaway(System::baseUrl()); }