90 lines
2.9 KiB
PHP
90 lines
2.9 KiB
PHP
<?php
|
|
/**
|
|
* @file src/Module/Owa.php
|
|
*/
|
|
namespace Friendica\Module;
|
|
|
|
use Friendica\BaseModule;
|
|
use Friendica\Core\System;
|
|
use Friendica\Database\DBA;
|
|
use Friendica\Model\Contact;
|
|
use Friendica\Model\OpenWebAuthToken;
|
|
use Friendica\Util\HTTPSignature;
|
|
|
|
/**
|
|
* @brief OpenWebAuth verifier and token generator
|
|
*
|
|
* See https://macgirvin.com/wiki/mike/OpenWebAuth/Home
|
|
* 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.
|
|
*
|
|
* Ported from Hubzilla: https://framagit.org/hubzilla/core/blob/master/Zotlabs/Module/Owa.php
|
|
*/
|
|
class Owa extends BaseModule
|
|
{
|
|
public static function init()
|
|
{
|
|
|
|
$ret = [ 'success' => false ];
|
|
|
|
foreach (['REDIRECT_REMOTE_USER', 'HTTP_AUTHORIZATION'] as $head) {
|
|
if (array_key_exists($head, $_SERVER) && substr(trim($_SERVER[$head]), 0, 9) === 'Signature') {
|
|
if ($head !== 'HTTP_AUTHORIZATION') {
|
|
$_SERVER['HTTP_AUTHORIZATION'] = $_SERVER[$head];
|
|
continue;
|
|
}
|
|
|
|
$sigblock = HTTPSignature::parseSigheader($_SERVER[$head]);
|
|
if ($sigblock) {
|
|
$keyId = $sigblock['keyId'];
|
|
|
|
if ($keyId) {
|
|
// Try to find the public contact entry of the handle.
|
|
$handle = str_replace('acct:', '', $keyId);
|
|
|
|
$cid = Contact::getIdForURL($handle);
|
|
$fields = ['id', 'url', 'addr', 'pubkey'];
|
|
$condition = ['id' => $cid];
|
|
|
|
$contact = DBA::selectFirst('contact', $fields, $condition);
|
|
|
|
if (DBA::isResult($contact)) {
|
|
// Try to verify the signed header with the public key of the contact record
|
|
// we have found.
|
|
$verified = HTTPSignature::verifyMagic($contact['pubkey']);
|
|
|
|
if ($verified && $verified['header_signed'] && $verified['header_valid']) {
|
|
logger('OWA header: ' . print_r($verified, true), LOGGER_DATA);
|
|
logger('OWA success: ' . $contact['addr'], LOGGER_DATA);
|
|
|
|
$ret['success'] = true;
|
|
$token = random_string(32);
|
|
|
|
// Store the generated token in the databe.
|
|
OpenWebAuthToken::create('owt', 0, $token, $contact['addr']);
|
|
|
|
$result = '';
|
|
|
|
// Encrypt the token with the public contacts publik key.
|
|
// Only the specific public contact will be able to encrypt it.
|
|
// At a later time, we will compare weather the token we're getting
|
|
// is really the same token we have stored in the database.
|
|
openssl_public_encrypt($token, $result, $contact['pubkey']);
|
|
$ret['encrypted_token'] = base64url_encode($result);
|
|
} else {
|
|
logger('OWA fail: ' . $contact['id'] . ' ' . $contact['addr'] . ' ' . $contact['url'], LOGGER_DEBUG);
|
|
}
|
|
} else {
|
|
logger('Contact not found: ' . $handle, LOGGER_DEBUG);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
System::jsonExit($ret, 'application/x-dfrn+json');
|
|
}
|
|
}
|