friendica/src/Module/Contact/Redir.php

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<?php
/**
* @copyright Copyright (C) 2010-2022, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Module\Contact;
use Friendica\Core\L10n;
use Friendica\App;
use Friendica\Core\Session\Capability\IHandleUserSessions;
use Friendica\Database\Database;
use Friendica\Model\Contact;
use Friendica\Module\Response;
use Friendica\Network\HTTPClient\Capability\ICanSendHttpRequests;
use Friendica\Network\HTTPClient\Client\HttpClientAccept;
use Friendica\Network\HTTPClient\Client\HttpClientOptions;
use Friendica\Network\HTTPException;
use Friendica\Util\Profiler;
use Friendica\Util\Strings;
use Psr\Log\LoggerInterface;
class Redir extends \Friendica\BaseModule
{
/** @var IHandleUserSessions */
private $session;
/** @var Database */
private $database;
/** @var App */
private $app;
/** @var ICanSendHttpRequests */
private $httpClient;
public function __construct(ICanSendHttpRequests $httpClient, App $app, Database $database, IHandleUserSessions $session, L10n $l10n, App\BaseURL $baseUrl, App\Arguments $args, LoggerInterface $logger, Profiler $profiler, Response $response, array $server, array $parameters = [])
{
parent::__construct($l10n, $baseUrl, $args, $logger, $profiler, $response, $server, $parameters);
$this->session = $session;
$this->database = $database;
$this->app = $app;
$this->httpClient = $httpClient;
}
protected function rawContent(array $request = [])
{
if (!$this->session->isAuthenticated()) {
throw new HTTPException\ForbiddenException($this->t('Access denied.'));
}
$url = $request['url'] ?? '';
$cid = $this->parameters['id'] ?? 0;
// Try magic auth before the legacy stuff
$this->magic($cid, $url);
$this->legacy($cid, $url);
}
/**
* @param int $cid
* @param string $url
* @return void
* @throws HTTPException\ForbiddenException
* @throws HTTPException\InternalServerErrorException
* @throws HTTPException\NotFoundException
* @throws \ImagickException
*/
private function magic(int $cid, string $url)
{
$visitor = $this->session->getMyUrl();
if (!empty($visitor)) {
$this->logger->info('Got my url', ['visitor' => $visitor]);
}
$contact = $this->database->selectFirst('contact', ['url'], ['id' => $cid]);
if (!$contact) {
$this->logger->info('Contact not found', ['id' => $cid]);
throw new HTTPException\NotFoundException($this->t('Contact not found.'));
} else {
$contact_url = $contact['url'];
$this->checkUrl($contact_url, $url);
$target_url = $url ?: $contact_url;
}
$basepath = Contact::getBasepath($contact_url);
// We don't use magic auth when there is no visitor, we are on the same system, or we visit our own stuff
if (empty($visitor) || Strings::compareLink($basepath, $this->baseUrl) || Strings::compareLink($contact_url, $visitor)) {
$this->logger->info('Redirecting without magic', ['target' => $target_url, 'visitor' => $visitor, 'contact' => $contact_url]);
$this->app->redirect($target_url);
}
// Test for magic auth on the target system
$response = $this->httpClient->head($basepath . '/magic', [HttpClientOptions::ACCEPT_CONTENT => HttpClientAccept::HTML]);
if ($response->isSuccess()) {
$separator = strpos($target_url, '?') ? '&' : '?';
$target_url .= $separator . 'zrl=' . urlencode($visitor) . '&addr=' . urlencode($contact_url);
$this->logger->info('Redirecting with magic', ['target' => $target_url, 'visitor' => $visitor, 'contact' => $contact_url]);
$this->app->redirect($target_url);
} else {
$this->logger->info('No magic for contact', ['contact' => $contact_url]);
}
}
/**
* @param int $cid
* @param string $url
* @return void
* @throws HTTPException\BadRequestException
* @throws HTTPException\ForbiddenException
* @throws HTTPException\InternalServerErrorException
* @throws HTTPException\NotFoundException
*/
private function legacy(int $cid, string $url): void
{
if (empty($cid)) {
throw new HTTPException\BadRequestException($this->t('Bad Request.'));
}
$fields = ['id', 'uid', 'nurl', 'url', 'addr', 'name'];
$contact = $this->database->selectFirst('contact', $fields, ['id' => $cid, 'uid' => [0, $this->session->getLocalUserId()]]);
if (!$contact) {
throw new HTTPException\NotFoundException($this->t('Contact not found.'));
}
$contact_url = $contact['url'];
if (!empty($this->app->getContactId()) && $this->app->getContactId() == $cid) {
// Local user is already authenticated.
$this->checkUrl($contact_url, $url);
$this->app->redirect($url ?: $contact_url);
}
if ($contact['uid'] == 0 && $this->session->getLocalUserId()) {
// Let's have a look if there is an established connection
// between the public contact we have found and the local user.
$contact = $this->database->selectFirst('contact', $fields, ['nurl' => $contact['nurl'], 'uid' => $this->session->getLocalUserId()]);
if ($contact) {
$cid = $contact['id'];
}
if (!empty($this->app->getContactId()) && $this->app->getContactId() == $cid) {
// Local user is already authenticated.
$this->checkUrl($contact_url, $url);
$target_url = $url ?: $contact_url;
$this->logger->info($contact['name'] . " is already authenticated. Redirecting to " . $target_url);
$this->app->redirect($target_url);
}
}
if ($this->session->getRemoteUserId()) {
$host = substr($this->baseUrl->getUrlPath() . ($this->baseUrl->getUrlPath() ? '/' . $this->baseUrl->getUrlPath() : ''), strpos($this->baseUrl->getUrlPath(), '://') + 3);
$remotehost = substr($contact['addr'], strpos($contact['addr'], '@') + 1);
// On a local instance we have to check if the local user has already authenticated
// with the local contact. Otherwise, the local user would ask the local contact
// for authentification everytime he/she is visiting a profile page of the local
// contact.
if (($host == $remotehost) && ($this->session->getRemoteContactID($this->session->get('visitor_visiting')) == $this->session->get('visitor_id'))) {
// Remote user is already authenticated.
$this->checkUrl($contact_url, $url);
$target_url = $url ?: $contact_url;
$this->logger->info($contact['name'] . " is already authenticated. Redirecting to " . $target_url);
$this->app->redirect($target_url);
}
}
if (empty($url)) {
throw new HTTPException\BadRequestException($this->t('Bad Request.'));
}
// If we don't have a connected contact, redirect with
// the 'zrl' parameter.
$my_profile = $this->session->getMyUrl();
if (!empty($my_profile) && !Strings::compareLink($my_profile, $url)) {
$separator = strpos($url, '?') ? '&' : '?';
$url .= $separator . 'zrl=' . urlencode($my_profile);
}
$this->logger->info('redirecting to ' . $url);
$this->app->redirect($url);
}
private function checkUrl(string $contact_url, string $url)
{
if (empty($contact_url) || empty($url)) {
return;
}
$url_host = parse_url($url, PHP_URL_HOST);
if (empty($url_host)) {
$url_host = parse_url($this->baseUrl, PHP_URL_HOST);
}
$contact_url_host = parse_url($contact_url, PHP_URL_HOST);
if ($url_host == $contact_url_host) {
return;
}
$this->logger->error('URL check host mismatch', ['contact' => $contact_url, 'url' => $url]);
throw new HTTPException\ForbiddenException($this->t('Access denied.'));
}
}