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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($_REQUEST['rev']) : 0);
if($hash) {
$x = q("select xchan.xchan_url, hubloc.* from xchan left join hubloc on xchan_hash = hubloc_hash
where hubloc_hash = '%s' and (hubloc_flags & %d) order by hubloc_id desc limit 1",
dbesc($hash),
intval(HUBLOC_FLAGS_PRIMARY)
);
}
elseif($addr) {
$x = q("select hubloc.* from xchan left join hubloc on xchan_hash = hubloc_hash
where xchan_addr = '%s' and (hubloc_flags & %d) order by hubloc_id desc limit 1",
dbesc($addr),
intval(HUBLOC_FLAGS_PRIMARY)
);
}
else {
// See if we know anybody at the dest site that will unlock the door for us
// This is the equivalent of buzzing every apartment in an apartment block
// to get inside the front gate. The thing about magic auth is that we're
// authenticating to the other site. Permissions provided by various
// channels will still affect what we can do once authenticated.
$b = explode('/',$dest);
if(count($b) >= 2) {
$u = $b[0] . '//' . $b[2];
if(local_user()) {
// first look for a connection or anybody who knows us
$x = q("select xchan.xchan_url, hubloc.* from xchan left join hubloc on xchan_hash = hubloc_hash
left join abook on abook_xchan = hubloc_hash
where abook_channel = %d and hubloc_url = '%s' order by hubloc_id desc limit 5",
intval(local_user()),
dbesc($u)
);
}
if(! $x) {
// no luck - ok anybody will do
$x = q("select xchan.xchan_url, hubloc.* from xchan left join hubloc on xchan_hash = hubloc_hash
where hubloc_url = '%s' order by hubloc_id desc limit 5",
dbesc($u)
);
}
if($x) {
// They must have a valid hubloc_addr
while(! strpos($x[0]['hubloc_addr'],'@')) {
array_shift($x);
}
}
}
}
if(! $x) {
// Finger them if they've never been seen here before
if($addr) {
$ret = zot_finger($addr,null);
if($ret['success']) {
$j = json_decode($ret['body'],true);
if($j)
import_xchan($j);
$x = q("select hubloc.* from xchan left join hubloc on xchan_hash = hubloc_hash
where xchan_addr = '%s' and (hubloc_flags & %d) order by hubloc_id desc limit 1",
dbesc($addr),
intval(HUBLOC_FLAGS_PRIMARY)
);
}
}
}
if(! $x) {
if($rev)
goaway($dest);
else {
logger('mod_magic: channel not found.' . print_r($_REQUEST,true));
notice( t('Channel 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($x[0]['hubloc_url'] === z_root()) {
$webbie = substr($x[0]['hubloc_addr'],0,strpos('@',$x[0]['hubloc_addr']));
switch($dest) {
case 'channel':
$desturl = z_root() . '/channel/' . $webbie;
break;
case 'photos':
$desturl = z_root() . '/photos/' . $webbie;
break;
case 'profile':
$desturl = z_root() . '/profile/' . $webbie;
break;
default:
$desturl = $dest;
break;
}
// We are already authenticated on this site and a registered observer.
// Just redirect.
goaway($desturl);
}
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;
$recip = array(array('guid' => $x[0]['hubloc_guid'],'guid_sig' => $x[0]['hubloc_guid_sig']));
$hash = random_string();
$r = q("insert into verify ( type, channel, token, meta, created) values ('%s','%d','%s','%s','%s')",
dbesc('auth'),
intval($channel['channel_id']),
dbesc($token),
dbesc($x[0]['hubloc_hash']),
dbesc(datetime_convert())
);
$target_url = $x[0]['hubloc_callback'] . '/' . substr($x[0]['hubloc_addr'],0,strpos($x[0]['hubloc_addr'],'@')) ;
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);
}
if(strpos($dest,'/'))
goaway($dest);
goaway(z_root());
}
|
