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<?php
@require_once('include/zot.php');
function magic_init(&$a) {
$ret = array('success' => false, 'url' => '', 'message' => '');
logger('mod_magic: invoked', LOGGER_DEBUG);
logger('mod_magic: args: ' . print_r($_REQUEST,true),LOGGER_DATA);
$addr = ((x($_REQUEST,'addr')) ? $_REQUEST['addr'] : '');
$dest = ((x($_REQUEST,'dest')) ? $_REQUEST['dest'] : '');
$test = ((x($_REQUEST,'test')) ? intval($_REQUEST['test']) : 0);
$rev = ((x($_REQUEST,'rev')) ? intval($_REQUEST['rev']) : 0);
$delegate = ((x($_REQUEST,'delegate')) ? $_REQUEST['delegate'] : '');
$parsed = parse_url($dest);
if(! $parsed) {
if($test) {
$ret['message'] .= 'could not parse ' . $dest . EOL;
return($ret);
}
goaway($dest);
}
$basepath = $parsed['scheme'] . '://' . $parsed['host'] . (($parsed['port']) ? ':' . $parsed['port'] : '');
$x = q("select * from hubloc where hubloc_url = '%s' order by hubloc_connected desc limit 1",
dbesc($basepath)
);
if(! $x) {
/*
* We have no records for, or prior communications with this hub.
* If an address was supplied, let's finger them to create a hub record.
* Otherwise we'll use the special address '[system]' which will return
* either a system channel or the first available normal channel. We don't
* really care about what channel is returned - we need the hub information
* from that response so that we can create signed auth packets destined
* for that hub.
*
*/
$ret = zot_finger((($addr) ? $addr : '[system]@' . $parsed['host']),null);
if($ret['success']) {
$j = json_decode($ret['body'],true);
if($j)
import_xchan($j);
// Now try again
$x = q("select * from hubloc where hubloc_url = '%s' order by hubloc_connected desc limit 1",
dbesc($basepath)
);
}
}
if(! $x) {
if($rev)
goaway($dest);
else {
logger('mod_magic: no channels found for requested hub.' . print_r($_REQUEST,true));
if($test) {
$ret['message'] .= 'This site has no previous connections with ' . $basepath . EOL;
return $ret;
}
notice( t('Hub not found.') . EOL);
return;
}
}
// This is ready-made for a plugin that provides a blacklist or "ask me" before blindly authenticating.
// By default, we'll proceed without asking.
$arr = array(
'channel_id' => local_channel(),
'xchan' => $x[0],
'destination' => $dest,
'proceed' => true
);
call_hooks('magic_auth',$arr);
$dest = $arr['destination'];
if(! $arr['proceed']) {
if($test) {
$ret['message'] .= 'cancelled by plugin.' . EOL;
return $ret;
}
goaway($dest);
}
if((get_observer_hash()) && ($x[0]['hubloc_url'] === z_root())) {
// We are already authenticated on this site and a registered observer.
// Just redirect.
if($test) {
$ret['success'] = true;
$ret['message'] .= 'Local site - you are already authenticated.' . EOL;
return $ret;
}
$delegation_success = false;
if($delegate) {
$r = q("select * from channel left join hubloc on channel_hash = hubloc_hash where hubloc_addr = '%s' limit 1",
dbesc($delegate)
);
if($r && intval($r[0]['channel_id'])) {
$allowed = perm_is_allowed($r[0]['channel_id'],get_observer_hash(),'delegate');
if($allowed) {
$_SESSION['delegate_channel'] = $r[0]['channel_id'];
$_SESSION['delegate'] = get_observer_hash();
$_SESSION['account_id'] = intval($r[0]['channel_account_id']);
change_channel($r[0]['channel_id']);
$delegation_success = true;
}
}
}
// FIXME: check and honour local delegation
goaway($dest);
}
if(local_channel()) {
$channel = $a->get_channel();
$token = random_string();
$token_sig = base64url_encode(rsa_sign($token,$channel['channel_prvkey']));
$channel['token'] = $token;
$channel['token_sig'] = $token_sig;
$r = q("insert into verify ( type, channel, token, meta, created) values ('%s','%d','%s','%s','%s')",
dbesc('auth'),
intval($channel['channel_id']),
dbesc($token),
dbesc($x[0]['hubloc_url']),
dbesc(datetime_convert())
);
$target_url = $x[0]['hubloc_callback'] . '/?f=&auth=' . urlencode($channel['channel_address'] . '@' . $a->get_hostname())
. '&sec=' . $token . '&dest=' . urlencode($dest) . '&version=' . ZOT_REVISION;
if($delegate)
$target_url .= '&delegate=' . urlencode($delegate);
logger('mod_magic: redirecting to: ' . $target_url, LOGGER_DEBUG);
if($test) {
$ret['success'] = true;
$ret['url'] = $target_url;
$ret['message'] = 'token ' . $token . ' created for channel ' . $channel['channel_id'] . ' for url ' . $x[0]['hubloc_url'] . EOL;
return $ret;
}
goaway($target_url);
}
if($test) {
$ret['message'] = 'Not authenticated or invalid arguments to mod_magic' . EOL;
return $ret;
}
goaway($dest);
}
|
