<?php namespace Zotlabs\Module; use Zotlabs\Web\HTTPSig; use Zotlabs\Lib\Verify; use Zotlabs\Web\Controller; /** * OpenWebAuth verifier and token generator * See spec/OpenWebAuth/Home.md * Requests to this endpoint should be signed using HTTP Signatures * using the 'Authorization: Signature' authentication method * If the signature verifies a token is returned. * * This token may be exchanged for an authenticated cookie. */ class Owa extends Controller { function init() { $ret = [ 'success' => false ]; if (array_key_exists('REDIRECT_REMOTE_USER',$_SERVER) && (! array_key_exists('HTTP_AUTHORIZATION',$_SERVER))) { $_SERVER['HTTP_AUTHORIZATION'] = $_SERVER['REDIRECT_REMOTE_USER']; } if (array_key_exists('HTTP_AUTHORIZATION',$_SERVER) && substr(trim($_SERVER['HTTP_AUTHORIZATION']),0,9) === 'Signature') { $sigblock = HTTPSig::parse_sigheader($_SERVER['HTTP_AUTHORIZATION']); if ($sigblock) { $keyId = $sigblock['keyId']; if ($keyId) { $r = q("SELECT * FROM hubloc LEFT JOIN xchan ON hubloc_hash = xchan_hash WHERE hubloc_id_url = '%s'", dbesc($keyId) ); if (! $r) { $found = discover_by_webbie(str_replace('acct:','',$keyId)); if ($found) { $r = q("SELECT * FROM hubloc LEFT JOIN xchan ON hubloc_hash = xchan_hash WHERE hubloc_id_url = '%s'", dbesc($keyId) ); } } if ($r) { foreach ($r as $hubloc) { $verified = HTTPSig::verify(file_get_contents('php://input'), $hubloc['xchan_pubkey']); if ($verified && $verified['header_signed'] && $verified['header_valid'] && ($verified['content_valid'] || (! $verified['content_signed']))) { logger('OWA header: ' . print_r($verified,true),LOGGER_DATA); logger('OWA success: ' . $hubloc['hubloc_id_url'],LOGGER_DATA); $ret['success'] = true; $token = random_string(32); Verify::create('owt',0,$token,$hubloc['hubloc_id_url']); $result = ''; openssl_public_encrypt($token,$result,$hubloc['xchan_pubkey']); $ret['encrypted_token'] = base64url_encode($result); break; } else { logger('OWA fail: ' . $hubloc['hubloc_id'] . ' ' . $hubloc['hubloc_id_url']); } } } } } } json_return_and_die($ret,'application/x-zot+json'); } }