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Merge pull request #13128 from annando/owa

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OWA: reworked code
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Hypolite Petovan 2023-05-16 08:09:23 -04:00 committed by GitHub
commit c58dd5b471
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1 changed files with 71 additions and 89 deletions
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160
src/Module/Magic.php
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@ -21,6 +21,7 @@
namespace Friendica\Module;
use Exception;
use Friendica\App;
use Friendica\BaseModule;
use Friendica\Core\L10n;
@ -30,7 +31,6 @@ use Friendica\Database\Database;
use Friendica\Model\Contact;
use Friendica\Model\User;
use Friendica\Network\HTTPClient\Capability\ICanSendHttpRequests;
use Friendica\Network\HTTPClient\Client\HttpClientAccept;
use Friendica\Network\HTTPClient\Client\HttpClientOptions;
use Friendica\Util\HTTPSignature;
use Friendica\Util\Profiler;
@ -65,120 +65,102 @@ class Magic extends BaseModule
protected function rawContent(array $request = [])
{
$this->logger->info('magic module: invoked');
if ($_SERVER['REQUEST_METHOD'] == 'HEAD') {
$this->logger->debug('Got a HEAD request');
System::exit();
}
$this->logger->debug('args', ['request' => $_REQUEST]);
$this->logger->debug('Invoked', ['request' => $request]);
$addr = $request['addr'] ?? '';
$dest = $request['dest'] ?? '';
$bdest = $request['bdest'] ?? '';
$owa = intval($request['owa'] ?? 0);
$cid = 0;
// bdest is preferred as it is hex-encoded and can survive url rewrite and argument parsing
// bdest is preferred as it is hex-encoded and can survive url rewrite and argument parsing
if (!empty($bdest)) {
$dest = hex2bin($bdest);
$this->logger->info('bdest detected. ', ['dest' => $dest]);
$this->logger->debug('bdest detected', ['dest' => $dest]);
}
if (!empty($addr)) {
$cid = Contact::getIdForURL($addr);
} elseif (!empty($dest)) {
$cid = Contact::getIdForURL($dest);
}
$this->logger->info('Contact ID: ', ['cid' => $cid]);
$contact = false;
if (!$cid) {
$this->logger->info('No contact record found', $_REQUEST);
if ($addr ?: $dest) {
$contact = Contact::getByURL($addr ?: $dest);
}
if (empty($contact)) {
if (!$owa) {
// @TODO Finding a more elegant possibility to redirect to either internal or external URL
$this->logger->info('No contact record found, no oWA, redirecting to destination.', ['request' => $request, 'server' => $_SERVER, 'dest' => $dest]);
$this->app->redirect($dest);
}
} else {
$contact = $this->dba->selectFirst('contact', ['id', 'nurl', 'url'], ['id' => $cid]);
// Redirect if the contact is already authenticated on this site.
if ($this->app->getContactId() && strpos($contact['nurl'], Strings::normaliseLink($this->baseUrl)) !== false) {
$this->logger->info('Contact is already authenticated');
$this->logger->info('Contact is already authenticated, redirecting to destination.', ['dest' => $dest]);
System::externalRedirect($dest);
}
$this->logger->info('Contact URL: ', ['url' => $contact['url']]);
$this->logger->debug('Contact found', ['url' => $contact['url']]);
}
if (!$this->userSession->getLocalUserId() || !$owa) {
$this->logger->notice('Not logged in or not OWA, redirecting to destination.', ['uid' => $this->userSession->getLocalUserId(), 'owa' => $owa, 'dest' => $dest]);
$this->app->redirect($dest);
}
// OpenWebAuth
if ($this->userSession->getLocalUserId() && $owa) {
$this->logger->info('Checking OWA now');
$user = User::getById($this->userSession->getLocalUserId());
$owner = User::getOwnerDataById($this->userSession->getLocalUserId());
$basepath = false;
if (!empty($contact)) {
$this->logger->info('Contact found - trying friendica style basepath extraction');
// Extract the basepath
// NOTE: we need another solution because this does only work
// for friendica contacts :-/ . We should have the basepath
// of a contact also in the contact table.
$contact_url = $contact['url'];
if (!(strpos($contact_url, '/profile/') === false)) {
$exp = explode('/profile/', $contact['url']);
$basepath = $exp[0];
$this->logger->info('Basepath: ', ['basepath' => $basepath]);
} else {
$this->logger->info('Not possible to extract basepath in friendica style');
}
}
if (!$basepath) {
// For the rest of the OpenWebAuth-enabled Fediverse
$parsed = parse_url($dest);
$this->logger->info('Parsed URL: ', ['parsed URL' => $parsed]);
if (!$parsed) {
System::externalRedirect($dest);
}
$basepath = $parsed['scheme'] . '://' . $parsed['host'] . (isset($parsed['port']) ? ':' . $parsed['port'] : '');
}
$accept_headers = ['application/x-dfrn+json', 'application/x-zot+json'];
$header = [
'Accept' => $accept_headers,
'X-Open-Web-Auth' => [Strings::getRandomHex()],
];
// Create a header that is signed with the local users private key.
$header = HTTPSignature::createSig(
$header,
$user['prvkey'],
'acct:' . $user['nickname'] . '@' . $this->baseUrl->getHost() . ($this->baseUrl->getPath() ? '/' . $this->baseUrl->getPath() : '')
);
$this->logger->info('Headers: ', ['headers' => $header]);
// Try to get an authentication token from the other instance.
$curlResult = $this->httpClient->get($basepath . '/owa', HttpClientAccept::DEFAULT, [HttpClientOptions::HEADERS => $header, HttpClientOptions::ACCEPT_CONTENT => $accept_headers]);
if ($curlResult->isSuccess()) {
$j = json_decode($curlResult->getBody(), true);
$this->logger->info('Curl result body: ', ['body' => $j]);
if ($j['success']) {
$token = '';
if ($j['encrypted_token']) {
// The token is encrypted. If the local user is really the one the other instance
// thinks he/she is, the token can be decrypted with the local users public key.
openssl_private_decrypt(Strings::base64UrlDecode($j['encrypted_token']), $token, $user['prvkey']);
} else {
$token = $j['token'];
}
$args = (strpbrk($dest, '?&') ? '&' : '?') . 'owt=' . $token;
$this->logger->info('Redirecting', ['path' => $dest . $args]);
System::externalRedirect($dest . $args);
}
}
$gserver = $this->dba->selectFirst('gserver', ['url'], ['id' => $contact['gsid']]);
if (empty($gserver)) {
$this->logger->notice('Server not found, redirecting to destination.', ['gsid' => $contact['gsid'], 'dest' => $dest]);
System::externalRedirect($dest);
}
// @TODO Finding a more elegant possibility to redirect to either internal or external URL
$this->app->redirect($dest);
$basepath = $gserver['url'];
$header = [
'Accept' => ['application/x-dfrn+json', 'application/x-zot+json'],
'X-Open-Web-Auth' => [Strings::getRandomHex()],
];
// Create a header that is signed with the local users private key.
$header = HTTPSignature::createSig(
$header,
$owner['prvkey'],
'acct:' . $owner['addr']
);
$this->logger->info('Fetch from remote system', ['basepath' => $basepath, 'headers' => $header]);
// Try to get an authentication token from the other instance.
try {
$curlResult = $this->httpClient->request('get', $basepath . '/owa', [HttpClientOptions::HEADERS => $header]);
} catch (Exception $exception) {
$this->logger->notice('URL is invalid, redirecting to destination.', ['url' => $basepath, 'error' => $exception, 'dest' => $dest]);
System::externalRedirect($dest);
}
if (!$curlResult->isSuccess()) {
$this->logger->notice('OWA request failed, redirecting to destination.', ['returncode' => $curlResult->getReturnCode(), 'dest' => $dest]);
System::externalRedirect($dest);
}
$j = json_decode($curlResult->getBody(), true);
if (empty($j) || !$j['success']) {
$this->logger->notice('Invalid JSON, redirecting to destination.', ['json' => $j, 'dest' => $dest]);
$this->app->redirect($dest);
}
if ($j['encrypted_token']) {
// The token is encrypted. If the local user is really the one the other instance
// thinks they is, the token can be decrypted with the local users public key.
$token = '';
openssl_private_decrypt(Strings::base64UrlDecode($j['encrypted_token']), $token, $owner['prvkey']);
} else {
$token = $j['token'];
}
$args = (strpbrk($dest, '?&') ? '&' : '?') . 'owt=' . $token;
$this->logger->debug('Redirecting', ['path' => $dest . $args]);
System::externalRedirect($dest . $args);
}
}