Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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12 years ago
<?php
use Friendica\App;
use Friendica\Core\L10n;
use Friendica\Core\Logger;
use Friendica\Core\Session;
use Friendica\Core\System;
use Friendica\Database\DBA;
use Friendica\Model\Contact;
use Friendica\Model\Profile;
use Friendica\Util\Network;
use Friendica\Util\Strings;
function redir_init(App $a) {
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$url = defaults($_GET, 'url', '');
$quiet = !empty($_GET['quiet']) ? '&quiet=1' : '';
if ($a->argc > 1 && intval($a->argv[1])) {
$cid = intval($a->argv[1]);
} else {
$cid = 0;
}
// Try magic auth before the legacy stuff
redir_magic($a, $cid, $url);
if (!empty($cid)) {
$fields = ['id', 'uid', 'nurl', 'url', 'addr', 'name', 'network', 'poll', 'issued-id', 'dfrn-id', 'duplex', 'pending'];
$contact = DBA::selectFirst('contact', $fields, ['id' => $cid, 'uid' => [0, local_user()]]);
if (!DBA::isResult($contact)) {
notice(L10n::t('Contact not found.'));
$a->internalRedirect();
}
$contact_url = $contact['url'];
if ((!local_user() && !remote_user()) // Visitors (not logged in or not remotes) can't authenticate.
|| (!empty($a->contact['id']) && $a->contact['id'] == $cid)) // Local user is already authenticated.
{
$a->redirect(defaults($url, $contact_url));
}
if ($contact['uid'] == 0 && local_user()) {
// Let's have a look if there is an established connection
// between the public 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.
$target_url = defaults($url, $contact_url);
Logger::log($contact['name'] . " is already authenticated. Redirecting to " . $target_url, Logger::DEBUG);
$a->redirect($target_url);
}
}
if (remote_user()) {
$host = substr($a->getBaseURL() . ($a->getURLPath() ? '/' . $a->getURLPath() : ''), strpos($a->getBaseURL(), '://') + 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 == $remotehost
&& !empty($_SESSION['remote'])
&& is_array($_SESSION['remote']))
{
foreach ($_SESSION['remote'] as $v) {
if (!empty($v['uid']) && !empty($v['cid']) &&
$v['uid'] == Session::get('visitor_visiting') &&
$v['cid'] == Session::get('visitor_id')) {
// Remote user is already authenticated.
$target_url = defaults($url, $contact_url);
Logger::log($contact['name'] . " is already authenticated. Redirecting to " . $target_url, Logger::DEBUG);
$a->redirect($target_url);
}
}
}
}
// When the remote page does support OWA, then we enforce the use of it
$basepath = Contact::getBasepath($contact_url);
if (Strings::compareLink($basepath, System::baseUrl())) {
$use_magic = true;
} else {
$serverret = Network::curl($basepath . '/magic');
$use_magic = $serverret->isSuccess();
}
// Doing remote auth with dfrn.
if (local_user() && !$use_magic && (!empty($contact['dfrn-id']) || !empty($contact['issued-id'])) && empty($contact['pending'])) {
$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 = Strings::getRandomHex();
$fields = ['uid' => local_user(), 'cid' => $cid, 'dfrn_id' => $dfrn_id,
'sec' => $sec, 'expire' => time() + 45];
DBA::insert('profile_check', $fields);
Logger::log('mod_redir: ' . $contact['name'] . ' ' . $sec, Logger::DEBUG);
$dest = (!empty($url) ? '&destination_url=' . $url : '');
System::externalRedirect($contact['poll'] . '?dfrn_id=' . $dfrn_id
. '&dfrn_version=' . DFRN_PROTOCOL_VERSION . '&type=profile&sec=' . $sec . $dest . $quiet);
}
$url = defaults($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) && !Strings::compareLink($my_profile, $url)) {
$separator = strpos($url, '?') ? '&' : '?';
$url .= $separator . 'zrl=' . urlencode($my_profile);
}
Logger::log('redirecting to ' . $url, Logger::DEBUG);
$a->redirect($url);
}
notice(L10n::t('Contact not found.'));
$a->internalRedirect();
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}
function redir_magic($a, $cid, $url)
{
$visitor = Profile::getMyURL();
if (!empty($visitor)) {
Logger::info('Got my url', ['visitor' => $visitor]);
}
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/// @todo Most likely these lines are superfluous. We will remove them in the next version
if (empty($visitor) && remote_user()) {
$contact = DBA::selectFirst('contact', ['url'], ['id' => remote_user()]);
if (!empty($contact['url'])) {
$visitor = $contact['url'];
Logger::info('Got remote user', ['visitor' => $visitor]);
}
}
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if (empty($visitor) && local_user()) {
$contact = DBA::selectFirst('contact', ['url'], ['id' => local_user()]);
if (!empty($contact['url'])) {
$visitor = $contact['url'];
Logger::info('Got local user', ['visitor' => $visitor]);
}
}
$contact = DBA::selectFirst('contact', ['url'], ['id' => $cid]);
if (!DBA::isResult($contact)) {
Logger::info('Contact not found', ['id' => $cid]);
// Shouldn't happen under normal conditions
notice(L10n::t('Contact not found.'));
if (!empty($url)) {
$a->redirect($url);
} else {
$a->internalRedirect();
}
} else {
$contact_url = $contact['url'];
$target_url = defaults($url, $contact_url);
}
$basepath = Contact::getBasepath($contact_url);
// We don't use magic auth when there is no visitor, we are on the same system or we visit our own stuff
if (empty($visitor) || Strings::compareLink($basepath, System::baseUrl()) || Strings::compareLink($contact_url, $visitor)) {
Logger::info('Redirecting without magic', ['target' => $target_url, 'visitor' => $visitor, 'contact' => $contact_url]);
$a->redirect($target_url);
}
// Test for magic auth on the target system
$serverret = Network::curl($basepath . '/magic');
if ($serverret->isSuccess()) {
$separator = strpos($target_url, '?') ? '&' : '?';
$target_url .= $separator . 'zrl=' . urlencode($visitor);
Logger::info('Redirecting with magic', ['target' => $target_url, 'visitor' => $visitor, 'contact' => $contact_url]);
$a->redirect($target_url);
} else {
Logger::info('No magic for contact', ['contact' => $contact_url]);
}
}