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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;
use GuzzleHttp\Psr7\Request;
use HttpSignature\HttpMessageSigner;
class Magic extends Controller {
function init() {
logger('mod_magic: invoked', LOGGER_DEBUG);
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
$data = $_POST;
} elseif ($_SERVER['REQUEST_METHOD'] === 'GET') {
$data = $_GET;
} else {
http_status_exit(405, 'Method Not Allowed');
}
logger('request method: ' . print_r($_SERVER['REQUEST_METHOD'], true), LOGGER_DATA);
logger('args: ' . print_r($data, true), LOGGER_DATA);
$bdest = $data['bdest'] ?? '';
$owa = $data['owa'] ?? 0;
$delegate = $data['delegate'] ?? '';
// bdest is preferred as it is hex-encoded and can survive url rewrite and argument parsing
if (!$bdest) {
http_status_exit(400, 'Bad Request');
}
$dest = hex2bin($bdest);
$parsed = parse_url($dest);
if (!$parsed) {
http_status_exit(400, 'Bad Request');
}
$basepath = unparse_url($parsed, ['scheme', 'host', 'port']);
$owapath = SConfig::get($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($dest);
}
if (get_observer_hash() && str_starts_with($dest, z_root())) {
// 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');
// try RFC9421 first
$request = new Request(
'GET',
$owapath,
[
'Host' => $parsed['host'],
'Date' => gmdate('D, d M Y H:i:s T'),
'Accept' => 'application/x-zot+json',
'X-Open-Web-Auth' => random_string(),
],
);
$signer = new HttpMessageSigner();
$signer->setPrivateKey($channel['channel_prvkey']);
$signer->setAlgorithm('rsa-v1_5-sha256');
$signer->setKeyId(channel_url($channel));
$signer->setCreated(time());
$signer->setExpires(time() + 3600);
$coveredFields = '("@method" "@target-uri" "host" "date" "accept" "x-open-web-auth")';
$request = $signer->signRequest($coveredFields, $request);
$signedHeaders = $signer->getHeaders($request);
$curlHeaders = [];
foreach ($signedHeaders as $key => $value) {
$curlHeaders[] = $key . ': ' . $value;
}
$redirects = 0;
$x = z_fetch_url($owapath, false, $redirects, ['headers' => $curlHeaders]);
logger('owa RFC9421 fetch returned: ' . print_r($x,true),LOGGER_DATA);
$rfc9421 = false;
if ($x['success']) {
$rfc9421_result = json_decode($x['body'], true);
$rfc9421 = $rfc9421_result['success'];
}
if (!$rfc9421 || ($x['return_code'] >= 400 && $x['return_code'] != 404)) {
$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 : '?owt=' . $token) . (($delegate) ? '&delegate=1' : '');
goaway($dest . $args);
}
else {
$o = '<h1>OWA ERROR</h1>';
if (!empty($j['message'])) {
$o .= '<h2>' . $j['message'] . '</h2>';
}
$o .= '<a href=' . $dest . '>' . $dest . '</a>';
echo $o;
killme();
}
}
}
}
goaway($dest);
}
}
|
