121 lines
3.4 KiB
PHP
121 lines
3.4 KiB
PHP
<?php
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/**
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* @file src/Module/Magic.php
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*/
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namespace Friendica\Module;
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use Friendica\BaseModule;
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use Friendica\Model\Contact;
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use Friendica\Util\HTTPSignature;
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use Friendica\Util\Network;
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use dba;
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/**
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* Magic Auth (remote authentication) module.
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*
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* Ported from Hubzilla: https://framagit.org/hubzilla/core/blob/master/Zotlabs/Module/Magic.php
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*/
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class Magic extends BaseModule
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{
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public static function init()
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{
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$a = self::getApp();
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$ret = ['success' => false, 'url' => '', 'message' => ''];
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logger('magic mdule: invoked', LOGGER_DEBUG);
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logger('args: ' . print_r($_REQUEST, true), LOGGER_DATA);
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$addr = ((x($_REQUEST, 'addr')) ? $_REQUEST['addr'] : '');
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$dest = ((x($_REQUEST, 'dest')) ? $_REQUEST['dest'] : '');
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$test = ((x($_REQUEST, 'test')) ? intval($_REQUEST['test']) : 0);
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$owa = ((x($_REQUEST, 'owa')) ? intval($_REQUEST['owa']) : 0);
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// NOTE: I guess $dest isn't just the profile url (could be also
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// other profile pages e.g. photo). We need to find a solution
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// to be able to redirct to other pages than the contact profile.
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$cid = Contact::getIdForURL($dest);
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if (!$cid && !empty($addr)) {
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$cid = Contact::getIdForURL($addr);
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}
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if (!$cid) {
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logger('No contact record found: ' . print_r($_REQUEST, true), LOGGER_DEBUG);
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goaway($dest);
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}
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$contact = 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 (array_key_exists('id', $a->contact) && strpos($contact['nurl'], normalise_link(self::getApp()->get_baseurl())) !== false) {
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if($test) {
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$ret['success'] = true;
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$ret['message'] .= 'Local site - you are already authenticated.' . EOL;
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return $ret;
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}
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logger('Contact is already authenticated', LOGGER_DEBUG);
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goaway($dest);
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}
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if (local_user()) {
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$user = $a->user;
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// OpenWebAuth
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if ($owa) {
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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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$exp = explode('/profile/', $contact['url']);
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$basepath = $exp[0];
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$headers = [];
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$headers['Accept'] = 'application/x-dfrn+json';
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$headers['X-Open-Web-Auth'] = random_string();
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// Create a header that is signed with the local users private key.
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$headers = HTTPSignature::createSig(
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'',
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$headers,
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$user['prvkey'],
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'acct:' . $user['nickname'] . '@' . $a->get_hostname() . ($a->path ? '/' . $a->path : ''),
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false,
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true,
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'sha512'
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);
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// Try to get an authentication token from the other instance.
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$x = Network::curl($basepath . '/owa', false, $redirects, ['headers' => $headers]);
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if ($x['success']) {
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$j = json_decode($x['body'], true);
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if ($j['success']) {
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$token = '';
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if ($j['encrypted_token']) {
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// The token is encrypted. If the local user is really the one the other instance
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// thinks he/she is, the token can be decrypted with the local users public key.
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openssl_private_decrypt(base64url_decode($j['encrypted_token']), $token, $user['prvkey']);
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} else {
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$token = $j['token'];
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}
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$x = strpbrk($dest, '?&');
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$args = (($x) ? '&owt=' . $token : '?f=&owt=' . $token);
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goaway($dest . $args);
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}
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}
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goaway($dest);
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}
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}
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if($test) {
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$ret['message'] = 'Not authenticated or invalid arguments' . EOL;
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return $ret;
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}
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goaway($dest);
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}
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}
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