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<?php
@require_once('include/zot.php');
function magic_init(&$a) {
logger('mod_magic: invoked', LOGGER_DEBUG);
logger('mod_magic: args: ' . print_r($_REQUEST,true),LOGGER_DATA);
$addr = ((x($_REQUEST,'addr')) ? $_REQUEST['addr'] : '');
$hash = ((x($_REQUEST,'hash')) ? $_REQUEST['hash'] : '');
$dest = ((x($_REQUEST,'dest')) ? $_REQUEST['dest'] : '');
$rev = ((x($_REQUEST,'rev')) ? intval($_REQUEST['rev']) : 0);
$parsed = parse_url($dest);
if(! $parsed)
goaway($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(! $x) {
// Somebody new? Finger them if they've never been seen here before
if($addr) {
$ret = zot_finger($addr,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));
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_user(),
'xchan' => $x[0],
'destination' => $dest,
'proceed' => true
);
call_hooks('magic_auth',$arr);
$dest = $arr['destination'];
if(! $arr['proceed'])
goaway($dest);
if((get_observer_hash()) && ($x[0]['hubloc_url'] === z_root())) {
// We are already authenticated on this site and a registered observer.
// Just redirect.
goaway($dest);
}
if(local_user()) {
$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'];
logger('mod_magic: redirecting to: ' . $target_url, LOGGER_DEBUG);
goaway($target_url
. '/?f=&auth=' . urlencode($channel['channel_address'] . '@' . $a->get_hostname())
. '&sec=' . $token . '&dest=' . urlencode($dest) . '&version=' . ZOT_REVISION);
}
goaway($dest);
}
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