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|
<?php
namespace Zotlabs\Module;
use App;
use Zotlabs\Web\Controller;
use Zotlabs\Web\HTTPSig;
use Zotlabs\Lib\Libzot;
use Zotlabs\Lib\SConfig;
class Magic extends Controller {
function init() {
$ret = [
'success' => false,
'url' => '',
'message' => ''
];
logger('mod_magic: invoked', LOGGER_DEBUG);
logger('args: ' . print_r($_REQUEST,true),LOGGER_DATA);
$addr = ((x($_REQUEST,'addr')) ? $_REQUEST['addr'] : '');
$bdest = ((x($_REQUEST,'bdest')) ? $_REQUEST['bdest'] : '');
$dest = ((x($_REQUEST,'dest')) ? $_REQUEST['dest'] : '');
$rev = ((x($_REQUEST,'rev')) ? intval($_REQUEST['rev']) : 0);
$owa = ((x($_REQUEST,'owa')) ? intval($_REQUEST['owa']) : 0);
$delegate = ((x($_REQUEST,'delegate')) ? $_REQUEST['delegate'] : '');
// bdest is preferred as it is hex-encoded and can survive url rewrite and argument parsing
if ($bdest) {
$dest = hex2bin($bdest);
}
$parsed = parse_url($dest);
if (! $parsed) {
goaway($dest);
}
$basepath = unparse_url(array_filter(
$parsed,
fn (string $key) => in_array($key, ['scheme', 'host', 'port']),
ARRAY_FILTER_USE_KEY
));
$owapath = SConfig::get($basepath,'system','openwebauth', $basepath . '/owa');
// 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 = [
'channel_id' => local_channel(),
'destination' => $dest,
'proceed' => true
];
call_hooks('magic_auth',$arr);
$dest = $arr['destination'];
if (! $arr['proceed']) {
goaway($dest);
}
if((get_observer_hash()) && (stripos($dest,z_root()) === 0)) {
// We are already authenticated on this site and a registered observer.
// First check if this is a delegate request on the local system and process accordingly.
// Otherwise redirect.
if ($delegate) {
$r = q("select * from channel left join hubloc on channel_hash = hubloc_hash where hubloc_addr = '%s' limit 1",
dbesc($delegate)
);
if ($r) {
$c = array_shift($r);
if (perm_is_allowed($c['channel_id'],get_observer_hash(),'delegate')) {
$tmp = $_SESSION;
$_SESSION['delegate_push'] = $tmp;
$_SESSION['delegate_channel'] = $c['channel_id'];
$_SESSION['delegate'] = get_observer_hash();
$_SESSION['account_id'] = intval($c['channel_account_id']);
change_channel($c['channel_id']);
}
}
}
goaway($dest);
}
if (local_channel()) {
$channel = App::get_channel();
// OpenWebAuth
if ($owa) {
$dest = strip_zids($dest);
$dest = strip_query_param($dest,'f');
// We now post to the OWA endpoint. This improves security by providing a signed digest
$data = json_encode([ 'OpenWebAuth' => random_string() ]);
$headers = [];
$headers['Accept'] = 'application/x-zot+json' ;
$headers['Content-Type'] = 'application/x-zot+json' ;
$headers['X-Open-Web-Auth'] = random_string();
$headers['Host'] = $parsed['host'];
$headers['(request-target)'] = 'get /owa';
$headers = HTTPSig::create_sig($headers,$channel['channel_prvkey'], channel_url($channel),true,'sha512');
$redirects = 0;
$x = z_fetch_url($owapath, false, $redirects, ['headers' => $headers]);
logger('owa fetch returned: ' . print_r($x,true),LOGGER_DATA);
if ($x['success']) {
$j = json_decode($x['body'],true);
if ($j['success'] && $j['encrypted_token']) {
// decrypt the token using our private key
$token = '';
openssl_private_decrypt(base64url_decode($j['encrypted_token']),$token,$channel['channel_prvkey']);
$x = strpbrk($dest,'?&');
// redirect using the encrypted token which will be exchanged for an authenticated session
$args = (($x) ? '&owt=' . $token : '?f=&owt=' . $token) . (($delegate) ? '&delegate=1' : '');
goaway($dest . $args);
}
}
}
}
goaway($dest);
}
}
|
