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friendica
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Avoid endless loop at magic auth

This commit is contained in:
Michael 2018-10-16 06:32:12 +00:00
parent cbd49b641a
commit 012fe3c11e
1 changed files with 44 additions and 41 deletions
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85
src/Model/Profile.php
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@ -1010,56 +1010,59 @@ class Profile
$my_url = self::getMyURL();
$my_url = Network::isUrlValid($my_url);
if ($my_url) {
if (!local_user()) {
// Is it a DDoS attempt?
// The check fetches the cached value from gprobe to reduce the load for this system
$urlparts = parse_url($my_url);
if (empty($my_url) || local_user()) {
return;
}
$result = Cache::get('gprobe:' . $urlparts['host']);
if ((!is_null($result)) && (in_array($result['network'], [Protocol::FEED, Protocol::PHANTOM]))) {
logger('DDoS attempt detected for ' . $urlparts['host'] . ' by ' . $_SERVER['REMOTE_ADDR'] . '. server data: ' . print_r($_SERVER, true), LOGGER_DEBUG);
return;
}
// Avoid endless loops
$cachekey = 'zrlInit:' . $my_url;
if (Cache::get($cachekey)) {
logger('URL ' . $my_url . ' already tried to authenticate.', LOGGER_DEBUG);
return;
} else {
Cache::set($cachekey, true, CACHE_MINUTE);
}
Worker::add(PRIORITY_LOW, 'GProbe', $my_url);
$arr = ['zrl' => $my_url, 'url' => $a->cmd];
Addon::callHooks('zrl_init', $arr);
$arr = ['zrl' => $my_url, 'url' => $a->cmd];
Addon::callHooks('zrl_init', $arr);
// Try to find the public contact entry of the visitor.
$cid = Contact::getIdForURL($my_url);
if (!$cid) {
logger('No contact record found for ' . $my_url, LOGGER_DEBUG);
return;
}
// Try to find the public contact entry of the visitor.
$cid = Contact::getIdForURL($my_url);
if (!$cid) {
logger('No contact record found for ' . $my_url, LOGGER_DEBUG);
return;
}
$contact = DBA::selectFirst('contact',['id', 'url'], ['id' => $cid]);
Worker::add(PRIORITY_LOW, 'GProbe', $my_url);
if (DBA::isResult($contact) && remote_user() && remote_user() == $contact['id']) {
// The visitor is already authenticated.
return;
}
$contact = DBA::selectFirst('contact',['id', 'url'], ['id' => $cid]);
logger('Not authenticated. Invoking reverse magic-auth for ' . $my_url, LOGGER_DEBUG);
if (DBA::isResult($contact) && remote_user() && remote_user() == $contact['id']) {
logger('The visitor ' . $my_url . ' is already authenticated', LOGGER_DEBUG);
return;
}
// Try to avoid recursion - but send them home to do a proper magic auth.
$query = str_replace(array('?zrl=', '&zid='), array('?rzrl=', '&rzrl='), $a->query_string);
// The other instance needs to know where to redirect.
$dest = urlencode(System::baseUrl() . '/' . $query);
logger('Not authenticated. Invoking reverse magic-auth for ' . $my_url, LOGGER_DEBUG);
// We need to extract the basebath from the profile url
// to redirect the visitors '/magic' module.
// Note: We should have the basepath of a contact also in the contact table.
$urlarr = explode('/profile/', $contact['url']);
$basepath = $urlarr[0];
// Try to avoid recursion - but send them home to do a proper magic auth.
$query = str_replace(array('?zrl=', '&zid='), array('?rzrl=', '&rzrl='), $a->query_string);
// The other instance needs to know where to redirect.
$dest = urlencode(System::baseUrl() . '/' . $query);
if ($basepath != System::baseUrl() && !strstr($dest, '/magic') && !strstr($dest, '/rmagic')) {
$magic_path = $basepath . '/magic' . '?f=&owa=1&dest=' . $dest;
$serverret = Network::curl($magic_path);
if ($serverret->isSuccess()) {
goaway($magic_path);
}
}
// We need to extract the basebath from the profile url
// to redirect the visitors '/magic' module.
// Note: We should have the basepath of a contact also in the contact table.
$urlarr = explode('/profile/', $contact['url']);
$basepath = $urlarr[0];
if ($basepath != System::baseUrl() && !strstr($dest, '/magic') && !strstr($dest, '/rmagic')) {
$magic_path = $basepath . '/magic' . '?f=&owa=1&dest=' . $dest;
// We have to check if the remote server does understand /magic without invoking something
$serverret = Network::curl($basepath . '/magic');
if ($serverret->isSuccess()) {
logger('Doing magic auth for visitor ' . $my_url . ' to ' . $magic_path, LOGGER_DEBUG);
goaway($magic_path);
}
}
}