235 lines
9.7 KiB
PHP
235 lines
9.7 KiB
PHP
<?php
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/*
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* GNU Social - a federating social network
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* Copyright (C) 2013, Free Software Foundation, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Implements WebFinger for GNU Social, as well as support for the
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* '.well-known/host-meta' resource.
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*
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* Depends on: LRDD plugin
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*
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* @package GNUsocial
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* @author Mikael Nordfeldth <mmn@hethane.se>
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*/
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if (!defined('GNUSOCIAL')) { exit(1); }
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class WebFingerPlugin extends Plugin
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{
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const PLUGIN_VERSION = '2.0.0';
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const OAUTH_ACCESS_TOKEN_REL = 'http://apinamespace.org/oauth/access_token';
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const OAUTH_REQUEST_TOKEN_REL = 'http://apinamespace.org/oauth/request_token';
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const OAUTH_AUTHORIZE_REL = 'http://apinamespace.org/oauth/authorize';
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public function onRouterInitialized(URLMapper $m)
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{
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$m->connect('.well-known/host-meta', ['action' => 'hostmeta']);
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$m->connect('.well-known/host-meta.:format',
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['action' => 'hostmeta'],
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['format' => '(xml|json)']);
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// the resource GET parameter can be anywhere, so don't mention it here
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$m->connect('.well-known/webfinger', ['action' => 'webfinger']);
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$m->connect('.well-known/webfinger.:format',
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['action' => 'webfinger'],
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['format' => '(xml|json)']);
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$m->connect('main/ownerxrd', ['action' => 'ownerxrd']);
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return true;
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}
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public function onLoginAction($action, &$login)
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{
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switch ($action) {
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case 'hostmeta':
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case 'webfinger':
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$login = true;
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return false;
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}
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return true;
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}
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public function onStartGetProfileAcctUri(Profile $profile, &$acct)
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{
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$wfr = new WebFingerResource_Profile($profile);
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try {
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$acct = $wfr->reconstructAcct();
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} catch (Exception $e) {
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return true;
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}
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return false;
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}
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public function onEndGetWebFingerResource($resource, WebFingerResource &$target=null, array $args=array())
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{
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$profile = null;
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if (Discovery::isAcct($resource)) {
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$parts = explode('@', substr(urldecode($resource), 5)); // 5 is strlen of 'acct:'
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if (count($parts) == 2) {
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list($nick, $domain) = $parts;
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if ($domain !== common_config('site', 'server')) {
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throw new Exception(_('Remote profiles not supported via WebFinger yet.'));
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}
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$nick = common_canonical_nickname($nick);
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$user = User::getKV('nickname', $nick);
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if (!($user instanceof User)) {
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throw new NoSuchUserException(array('nickname'=>$nick));
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}
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$profile = $user->getProfile();
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}
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} elseif (!common_valid_http_url($resource)) {
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// If it's not a URL, we can't do our http<->https legacy fix thingie anyway,
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// so just try the User URI lookup!
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try {
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$user = User::getByUri($resource);
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$profile = $user->getProfile();
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} catch (NoResultException $e) {
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// not a User, maybe a Notice? we'll try that further down...
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}
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} else {
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// this means $resource is a common_valid_http_url (or https)
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// First build up a set of alternative resource URLs that we can use.
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$alt_urls = [$resource => true];
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if (strtolower(parse_url($resource, PHP_URL_SCHEME)) === 'https'
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&& common_config('fix', 'legacy_http')) {
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$alt_urls[preg_replace('/^https:/i', 'http:', $resource, 1)] = true;
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}
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if (common_config('fix', 'fancyurls')) {
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foreach (array_keys($alt_urls) as $url) {
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try { // if it's a /index.php/ url
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// common_fake_local_fancy_url can throw an exception
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$alt_url = common_fake_local_fancy_url($url);
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} catch (Exception $e) { // let's try to create a fake local /index.php/ url
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// this too if it can't do anything about the URL
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$alt_url = common_fake_local_nonfancy_url($url);
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}
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$alt_urls[$alt_url] = true;
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}
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}
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common_debug(__METHOD__.': Generated these alternative URLs for various federation fixes: '._ve(array_keys($alt_urls)));
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try {
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common_debug(__METHOD__.': Finding User URI for WebFinger lookup on resource=='._ve($resource));
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$user = new User();
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$user->whereAddIn('uri', array_keys($alt_urls), $user->columnType('uri'));
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$user->limit(1);
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if ($user->find(true)) {
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$profile = $user->getProfile();
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}
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unset($user);
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} catch (Exception $e) {
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// Most likely a UserNoProfileException, if it ever happens
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// and then we need to do some debugging and perhaps fixes.
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common_log(LOG_ERR, get_class($e).': '._ve($e->getMessage()));
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throw $e;
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}
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try {
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common_debug(__METHOD__.': Finding User_group URI for WebFinger lookup on resource=='._ve($resource));
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$group = new User_group();
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$group->whereAddIn('uri', array_keys($alt_urls), $group->columnType('uri'));
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$group->limit(1);
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if ($group->find(true)) {
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$profile = $group->getProfile();
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}
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unset($group);
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} catch (Exception $e) {
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common_log(LOG_ERR, get_class($e).': '._ve($e->getMessage()));
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throw $e;
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}
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// User URI did not match, so let's try our alt_urls as Profile URL values
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if (!$profile instanceof Profile) {
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common_debug(__METHOD__.': Finding Profile URLs for WebFinger lookup on resource=='._ve($resource));
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// if our rewrite hack didn't work, try to get something by profile URL
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$profile = new Profile();
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$profile->whereAddIn('profileurl', array_keys($alt_urls), $profile->columnType('profileurl'));
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$profile->limit(1);
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if (!$profile->find(true) || !$profile->isLocal()) {
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// * Either we didn't find the profile, then we want to make
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// the $profile variable null for clarity.
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// * Or we did find it but for a possibly malicious remote
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// user who might've set their profile URL to a Notice URL
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// which would've caused a sort of DoS unless we continue
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// our search here by discarding the remote profile.
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$profile = null;
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}
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}
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}
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if ($profile instanceof Profile) {
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common_debug(__METHOD__.': Found Profile with ID=='._ve($profile->getID()).' for resource=='._ve($resource));
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$target = new WebFingerResource_Profile($profile);
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return false; // We got our target, stop handler execution
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}
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$notice = Notice::getKV('uri', $resource);
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if ($notice instanceof Notice) {
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$target = new WebFingerResource_Notice($notice);
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return false;
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}
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return true;
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}
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public function onStartHostMetaLinks(array &$links)
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{
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foreach (Discovery::supportedMimeTypes() as $type) {
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$links[] = new XML_XRD_Element_Link(Discovery::LRDD_REL,
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common_local_url('webfinger') . '?resource={uri}',
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$type,
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true); // isTemplate
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}
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// OAuth connections
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$links[] = new XML_XRD_Element_link(self::OAUTH_ACCESS_TOKEN_REL, common_local_url('ApiOAuthAccessToken'));
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$links[] = new XML_XRD_Element_link(self::OAUTH_REQUEST_TOKEN_REL, common_local_url('ApiOAuthRequestToken'));
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$links[] = new XML_XRD_Element_link(self::OAUTH_AUTHORIZE_REL, common_local_url('ApiOAuthAuthorize'));
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}
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/**
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* Add a link header for LRDD Discovery
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*/
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public function onStartShowHTML($action)
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{
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if ($action instanceof ShowstreamAction) {
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$resource = $action->getTarget()->getUri();
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$url = common_local_url('webfinger') . '?resource='.urlencode($resource);
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foreach (array(Discovery::JRD_MIMETYPE, Discovery::XRD_MIMETYPE) as $type) {
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header('Link: <'.$url.'>; rel="'. Discovery::LRDD_REL.'"; type="'.$type.'"', false);
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}
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}
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}
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public function onPluginVersion(array &$versions): bool
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{
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$versions[] = array('name' => 'WebFinger',
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'version' => self::PLUGIN_VERSION,
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'author' => 'Mikael Nordfeldth',
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'homepage' => GNUSOCIAL_ENGINE_URL,
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// TRANS: Plugin description.
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'rawdescription' => _m('Adds WebFinger lookup to GNU Social'));
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return true;
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}
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}
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