OWA: reworked code
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725f99c813
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@ -21,6 +21,7 @@
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namespace Friendica\Module;
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use Exception;
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use Friendica\App;
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use Friendica\BaseModule;
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use Friendica\Core\L10n;
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@ -30,7 +31,6 @@ use Friendica\Database\Database;
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use Friendica\Model\Contact;
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use Friendica\Model\User;
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use Friendica\Network\HTTPClient\Capability\ICanSendHttpRequests;
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use Friendica\Network\HTTPClient\Client\HttpClientAccept;
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use Friendica\Network\HTTPClient\Client\HttpClientOptions;
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use Friendica\Util\HTTPSignature;
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use Friendica\Util\Profiler;
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@ -65,120 +65,102 @@ class Magic extends BaseModule
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protected function rawContent(array $request = [])
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{
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$this->logger->info('magic module: invoked');
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if ($_SERVER['REQUEST_METHOD'] == 'HEAD') {
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$this->logger->debug('Got a HEAD request');
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System::exit();
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}
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$this->logger->debug('args', ['request' => $_REQUEST]);
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$this->logger->debug('Invoked', ['request' => $request]);
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$addr = $request['addr'] ?? '';
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$dest = $request['dest'] ?? '';
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$bdest = $request['bdest'] ?? '';
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$owa = intval($request['owa'] ?? 0);
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$cid = 0;
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// bdest is preferred as it is hex-encoded and can survive url rewrite and argument parsing
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// bdest is preferred as it is hex-encoded and can survive url rewrite and argument parsing
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if (!empty($bdest)) {
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$dest = hex2bin($bdest);
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$this->logger->info('bdest detected. ', ['dest' => $dest]);
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$this->logger->debug('bdest detected', ['dest' => $dest]);
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}
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if (!empty($addr)) {
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$cid = Contact::getIdForURL($addr);
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} elseif (!empty($dest)) {
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$cid = Contact::getIdForURL($dest);
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}
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$this->logger->info('Contact ID: ', ['cid' => $cid]);
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$contact = false;
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if (!$cid) {
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$this->logger->info('No contact record found', $_REQUEST);
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if (!empty($addr ?: $dest)) {
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$contact = Contact::getByURL($addr ?: $dest);
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}
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if (empty($contact)) {
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if (!$owa) {
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// @TODO Finding a more elegant possibility to redirect to either internal or external URL
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$this->logger->info('No contact record found, no oWA, redirecting to destination.', ['request' => $request, 'server' => $_SERVER, 'dest' => $dest]);
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$this->app->redirect($dest);
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}
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} else {
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$contact = $this->dba->selectFirst('contact', ['id', 'nurl', 'url'], ['id' => $cid]);
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// Redirect if the contact is already authenticated on this site.
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if ($this->app->getContactId() && strpos($contact['nurl'], Strings::normaliseLink($this->baseUrl)) !== false) {
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$this->logger->info('Contact is already authenticated');
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$this->logger->info('Contact is already authenticated, redirecting to destination.', ['dest' => $dest]);
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System::externalRedirect($dest);
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}
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$this->logger->info('Contact URL: ', ['url' => $contact['url']]);
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$this->logger->debug('Contact found', ['url' => $contact['url']]);
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}
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if (!$this->userSession->getLocalUserId() || !$owa) {
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$this->logger->notice('Not logged in or not OWA, redirecting to destination.', ['uid' => $this->userSession->getLocalUserId(), 'owa' => $owa, 'dest' => $dest]);
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$this->app->redirect($dest);
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}
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// OpenWebAuth
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if ($this->userSession->getLocalUserId() && $owa) {
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$this->logger->info('Checking OWA now');
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$user = User::getById($this->userSession->getLocalUserId());
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$owner = User::getOwnerDataById($this->userSession->getLocalUserId());
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$basepath = false;
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if (!empty($contact)) {
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$this->logger->info('Contact found - trying friendica style basepath extraction');
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// Extract the basepath
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// NOTE: we need another solution because this does only work
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// for friendica contacts :-/ . We should have the basepath
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// of a contact also in the contact table.
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$contact_url = $contact['url'];
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if (!(strpos($contact_url, '/profile/') === false)) {
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$exp = explode('/profile/', $contact['url']);
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$basepath = $exp[0];
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$this->logger->info('Basepath: ', ['basepath' => $basepath]);
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} else {
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$this->logger->info('Not possible to extract basepath in friendica style');
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}
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}
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if (!$basepath) {
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// For the rest of the OpenWebAuth-enabled Fediverse
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$parsed = parse_url($dest);
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$this->logger->info('Parsed URL: ', ['parsed URL' => $parsed]);
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if (!$parsed) {
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System::externalRedirect($dest);
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}
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$basepath = $parsed['scheme'] . '://' . $parsed['host'] . (isset($parsed['port']) ? ':' . $parsed['port'] : '');
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}
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$accept_headers = ['application/x-dfrn+json', 'application/x-zot+json'];
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$header = [
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'Accept' => $accept_headers,
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'X-Open-Web-Auth' => [Strings::getRandomHex()],
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];
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// Create a header that is signed with the local users private key.
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$header = HTTPSignature::createSig(
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$header,
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$user['prvkey'],
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'acct:' . $user['nickname'] . '@' . $this->baseUrl->getHost() . ($this->baseUrl->getPath() ? '/' . $this->baseUrl->getPath() : '')
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);
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$this->logger->info('Headers: ', ['headers' => $header]);
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// Try to get an authentication token from the other instance.
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$curlResult = $this->httpClient->get($basepath . '/owa', HttpClientAccept::DEFAULT, [HttpClientOptions::HEADERS => $header, HttpClientOptions::ACCEPT_CONTENT => $accept_headers]);
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if ($curlResult->isSuccess()) {
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$j = json_decode($curlResult->getBody(), true);
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$this->logger->info('Curl result body: ', ['body' => $j]);
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if ($j['success']) {
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$token = '';
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if ($j['encrypted_token']) {
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// The token is encrypted. If the local user is really the one the other instance
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// thinks he/she is, the token can be decrypted with the local users public key.
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openssl_private_decrypt(Strings::base64UrlDecode($j['encrypted_token']), $token, $user['prvkey']);
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} else {
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$token = $j['token'];
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}
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$args = (strpbrk($dest, '?&') ? '&' : '?') . 'owt=' . $token;
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$this->logger->info('Redirecting', ['path' => $dest . $args]);
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System::externalRedirect($dest . $args);
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}
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}
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$gserver = $this->dba->selectFirst('gserver', ['url'], ['id' => $contact['gsid']]);
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if (empty($gserver)) {
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$this->logger->notice('Server not found, redirecting to destination.', ['gsid' => $contact['gsid'], 'dest' => $dest]);
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System::externalRedirect($dest);
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}
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// @TODO Finding a more elegant possibility to redirect to either internal or external URL
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$this->app->redirect($dest);
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$basepath = $gserver['url'];
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$header = [
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'Accept' => ['application/x-dfrn+json', 'application/x-zot+json'],
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'X-Open-Web-Auth' => [Strings::getRandomHex()],
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];
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// Create a header that is signed with the local users private key.
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$header = HTTPSignature::createSig(
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$header,
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$owner['prvkey'],
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'acct:' . $owner['addr']
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);
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$this->logger->info('Fetch from remote system', ['basepath' => $basepath, 'headers' => $header]);
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// Try to get an authentication token from the other instance.
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try {
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$curlResult = $this->httpClient->request('get', $basepath . '/owa', [HttpClientOptions::HEADERS => $header]);
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} catch (Exception $exception) {
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$this->logger->notice('URL is invalid, redirecting to destination.', ['url' => $basepath, 'error' => $exception, 'dest' => $dest]);
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System::externalRedirect($dest);
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}
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if (!$curlResult->isSuccess()) {
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$this->logger->notice('OWA request failed, redirecting to destination.', ['returncode' => $curlResult->getReturnCode(), 'dest' => $dest]);
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System::externalRedirect($dest);
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}
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$j = json_decode($curlResult->getBody(), true);
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if (empty($j) || !$j['success']) {
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$this->logger->notice('Invalid JSON, redirecting to destination.', ['json' => $j, 'dest' => $dest]);
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$this->app->redirect($dest);
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}
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if ($j['encrypted_token']) {
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// The token is encrypted. If the local user is really the one the other instance
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// thinks they is, the token can be decrypted with the local users public key.
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$token = '';
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openssl_private_decrypt(Strings::base64UrlDecode($j['encrypted_token']), $token, $owner['prvkey']);
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} else {
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$token = $j['token'];
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}
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$args = (strpbrk($dest, '?&') ? '&' : '?') . 'owt=' . $token;
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$this->logger->debug('Redirecting', ['path' => $dest . $args]);
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System::externalRedirect($dest . $args);
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}
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}
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