387 lines
11 KiB
PHP
387 lines
11 KiB
PHP
<?php
|
|
/*
|
|
* Laconica - a distributed open-source microblogging tool
|
|
* Copyright (C) 2008, Controlez-Vous, Inc.
|
|
*
|
|
* 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 <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
if (!defined('LACONICA')) { exit(1); }
|
|
|
|
require_once(INSTALLDIR.'/lib/omb.php');
|
|
|
|
class RemotesubscribeAction extends Action {
|
|
|
|
function handle($args) {
|
|
|
|
parent::handle($args);
|
|
|
|
if (common_logged_in()) {
|
|
common_user_error(_('You can use the local subscription!'));
|
|
return;
|
|
}
|
|
|
|
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
|
|
|
|
# CSRF protection
|
|
$token = $this->trimmed('token');
|
|
if (!$token || $token != common_session_token()) {
|
|
$this->show_form(_('There was a problem with your session token. Try again, please.'));
|
|
return;
|
|
}
|
|
|
|
$this->remote_subscription();
|
|
} else {
|
|
$this->show_form();
|
|
}
|
|
}
|
|
|
|
function get_instructions() {
|
|
return _('To subscribe, you can [login](%%action.login%%),' .
|
|
' or [register](%%action.register%%) a new' .
|
|
' account. If you already have an account' .
|
|
' on a [compatible microblogging site](%%doc.openmublog%%),' .
|
|
' enter your profile URL below.');
|
|
}
|
|
|
|
function show_top($err=NULL) {
|
|
if ($err) {
|
|
common_element('div', 'error', $err);
|
|
} else {
|
|
$instructions = $this->get_instructions();
|
|
$output = common_markup_to_html($instructions);
|
|
common_element_start('div', 'instructions');
|
|
common_raw($output);
|
|
common_element_end('p');
|
|
}
|
|
}
|
|
|
|
function show_form($err=NULL) {
|
|
$nickname = $this->trimmed('nickname');
|
|
$profile = $this->trimmed('profile_url');
|
|
common_show_header(_('Remote subscribe'), NULL, $err,
|
|
array($this, 'show_top'));
|
|
# id = remotesubscribe conflicts with the
|
|
# button on profile page
|
|
common_element_start('form', array('id' => 'remsub', 'method' => 'post',
|
|
'action' => common_local_url('remotesubscribe')));
|
|
common_hidden('token', common_session_token());
|
|
common_input('nickname', _('User nickname'), $nickname,
|
|
_('Nickname of the user you want to follow'));
|
|
common_input('profile_url', _('Profile URL'), $profile,
|
|
_('URL of your profile on another compatible microblogging service'));
|
|
common_submit('submit', _('Subscribe'));
|
|
common_element_end('form');
|
|
common_show_footer();
|
|
}
|
|
|
|
function remote_subscription() {
|
|
$user = $this->get_user();
|
|
|
|
if (!$user) {
|
|
$this->show_form(_('No such user.'));
|
|
return;
|
|
}
|
|
|
|
$profile = $this->trimmed('profile_url');
|
|
|
|
if (!$profile) {
|
|
$this->show_form(_('No such user.'));
|
|
return;
|
|
}
|
|
|
|
if (!Validate::uri($profile, array('allowed_schemes' => array('http', 'https')))) {
|
|
$this->show_form(_('Invalid profile URL (bad format)'));
|
|
return;
|
|
}
|
|
|
|
$fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
|
|
$yadis = Auth_Yadis_Yadis::discover($profile, $fetcher);
|
|
|
|
if (!$yadis || $yadis->failed) {
|
|
$this->show_form(_('Not a valid profile URL (no YADIS document).'));
|
|
return;
|
|
}
|
|
|
|
# XXX: a little liberal for sites that accidentally put whitespace before the xml declaration
|
|
|
|
$xrds =& Auth_Yadis_XRDS::parseXRDS(trim($yadis->response_text));
|
|
|
|
if (!$xrds) {
|
|
$this->show_form(_('Not a valid profile URL (no XRDS defined).'));
|
|
return;
|
|
}
|
|
|
|
$omb = $this->getOmb($xrds);
|
|
|
|
if (!$omb) {
|
|
$this->show_form(_('Not a valid profile URL (incorrect services).'));
|
|
return;
|
|
}
|
|
|
|
if (omb_service_uri($omb[OAUTH_ENDPOINT_REQUEST]) ==
|
|
common_local_url('requesttoken'))
|
|
{
|
|
$this->show_form(_('That\'s a local profile! Login to subscribe.'));
|
|
return;
|
|
}
|
|
|
|
if (User::staticGet('uri', omb_local_id($omb[OAUTH_ENDPOINT_REQUEST]))) {
|
|
$this->show_form(_('That\'s a local profile! Login to subscribe.'));
|
|
return;
|
|
}
|
|
|
|
list($token, $secret) = $this->request_token($omb);
|
|
|
|
if (!$token || !$secret) {
|
|
$this->show_form(_('Couldn\'t get a request token.'));
|
|
return;
|
|
}
|
|
|
|
$this->request_authorization($user, $omb, $token, $secret);
|
|
}
|
|
|
|
function get_user() {
|
|
$user = NULL;
|
|
$nickname = $this->trimmed('nickname');
|
|
if ($nickname) {
|
|
$user = User::staticGet('nickname', $nickname);
|
|
}
|
|
return $user;
|
|
}
|
|
|
|
function getOmb($xrds) {
|
|
|
|
static $omb_endpoints = array(OMB_ENDPOINT_UPDATEPROFILE, OMB_ENDPOINT_POSTNOTICE);
|
|
static $oauth_endpoints = array(OAUTH_ENDPOINT_REQUEST, OAUTH_ENDPOINT_AUTHORIZE,
|
|
OAUTH_ENDPOINT_ACCESS);
|
|
$omb = array();
|
|
|
|
# XXX: the following code could probably be refactored to eliminate dupes
|
|
|
|
$oauth_services = omb_get_services($xrds, OAUTH_DISCOVERY);
|
|
|
|
if (!$oauth_services) {
|
|
return NULL;
|
|
}
|
|
|
|
$oauth_service = $oauth_services[0];
|
|
|
|
$oauth_xrd = $this->getXRD($oauth_service, $xrds);
|
|
|
|
if (!$oauth_xrd) {
|
|
return NULL;
|
|
}
|
|
|
|
if (!$this->addServices($oauth_xrd, $oauth_endpoints, $omb)) {
|
|
return NULL;
|
|
}
|
|
|
|
$omb_services = omb_get_services($xrds, OMB_NAMESPACE);
|
|
|
|
if (!$omb_services) {
|
|
return NULL;
|
|
}
|
|
|
|
$omb_service = $omb_services[0];
|
|
|
|
$omb_xrd = $this->getXRD($omb_service, $xrds);
|
|
|
|
if (!$omb_xrd) {
|
|
return NULL;
|
|
}
|
|
|
|
if (!$this->addServices($omb_xrd, $omb_endpoints, $omb)) {
|
|
return NULL;
|
|
}
|
|
|
|
# XXX: check that we got all the services we needed
|
|
|
|
foreach (array_merge($omb_endpoints, $oauth_endpoints) as $type) {
|
|
if (!array_key_exists($type, $omb) || !$omb[$type]) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (!omb_local_id($omb[OAUTH_ENDPOINT_REQUEST])) {
|
|
return NULL;
|
|
}
|
|
|
|
return $omb;
|
|
}
|
|
|
|
function getXRD($main_service, $main_xrds) {
|
|
$uri = omb_service_uri($main_service);
|
|
if (strpos($uri, "#") !== 0) {
|
|
# FIXME: more rigorous handling of external service definitions
|
|
return NULL;
|
|
}
|
|
$id = substr($uri, 1);
|
|
$nodes = $main_xrds->allXrdNodes;
|
|
$parser = $main_xrds->parser;
|
|
foreach ($nodes as $node) {
|
|
$attrs = $parser->attributes($node);
|
|
if (array_key_exists('xml:id', $attrs) &&
|
|
$attrs['xml:id'] == $id) {
|
|
# XXX: trick the constructor into thinking this is the only node
|
|
$bogus_nodes = array($node);
|
|
return new Auth_Yadis_XRDS($parser, $bogus_nodes);
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
function addServices($xrd, $types, &$omb) {
|
|
foreach ($types as $type) {
|
|
$matches = omb_get_services($xrd, $type);
|
|
if ($matches) {
|
|
$omb[$type] = $matches[0];
|
|
} else {
|
|
# no match for type
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
function request_token($omb) {
|
|
$con = omb_oauth_consumer();
|
|
|
|
$url = omb_service_uri($omb[OAUTH_ENDPOINT_REQUEST]);
|
|
|
|
# XXX: Is this the right thing to do? Strip off GET params and make them
|
|
# POST params? Seems wrong to me.
|
|
|
|
$parsed = parse_url($url);
|
|
$params = array();
|
|
parse_str($parsed['query'], $params);
|
|
|
|
$req = OAuthRequest::from_consumer_and_token($con, NULL, "POST", $url, $params);
|
|
|
|
$listener = omb_local_id($omb[OAUTH_ENDPOINT_REQUEST]);
|
|
|
|
if (!$listener) {
|
|
return NULL;
|
|
}
|
|
|
|
$req->set_parameter('omb_listener', $listener);
|
|
$req->set_parameter('omb_version', OMB_VERSION_01);
|
|
|
|
# XXX: test to see if endpoint accepts this signature method
|
|
|
|
$req->sign_request(omb_hmac_sha1(), $con, NULL);
|
|
|
|
# We re-use this tool's fetcher, since it's pretty good
|
|
|
|
$fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
|
|
|
|
$result = $fetcher->post($req->get_normalized_http_url(),
|
|
$req->to_postdata(),
|
|
array('User-Agent' => 'Laconica/' . LACONICA_VERSION));
|
|
|
|
if ($result->status != 200) {
|
|
return NULL;
|
|
}
|
|
|
|
parse_str($result->body, $return);
|
|
|
|
return array($return['oauth_token'], $return['oauth_token_secret']);
|
|
}
|
|
|
|
function request_authorization($user, $omb, $token, $secret) {
|
|
global $config; # for license URL
|
|
|
|
$con = omb_oauth_consumer();
|
|
$tok = new OAuthToken($token, $secret);
|
|
|
|
$url = omb_service_uri($omb[OAUTH_ENDPOINT_AUTHORIZE]);
|
|
|
|
# XXX: Is this the right thing to do? Strip off GET params and make them
|
|
# POST params? Seems wrong to me.
|
|
|
|
$parsed = parse_url($url);
|
|
$params = array();
|
|
parse_str($parsed['query'], $params);
|
|
|
|
$req = OAuthRequest::from_consumer_and_token($con, $tok, 'GET', $url, $params);
|
|
|
|
# We send over a ton of information. This lets the other
|
|
# server store info about our user, and it lets the current
|
|
# user decide if they really want to authorize the subscription.
|
|
|
|
$req->set_parameter('omb_version', OMB_VERSION_01);
|
|
$req->set_parameter('omb_listener', omb_local_id($omb[OAUTH_ENDPOINT_REQUEST]));
|
|
$req->set_parameter('omb_listenee', $user->uri);
|
|
$req->set_parameter('omb_listenee_profile', common_profile_url($user->nickname));
|
|
$req->set_parameter('omb_listenee_nickname', $user->nickname);
|
|
$req->set_parameter('omb_listenee_license', $config['license']['url']);
|
|
|
|
$profile = $user->getProfile();
|
|
if (!$profile) {
|
|
common_log_db_error($user, 'SELECT', __FILE__);
|
|
$this->server_error(_('User without matching profile'));
|
|
return;
|
|
}
|
|
|
|
if ($profile->fullname) {
|
|
$req->set_parameter('omb_listenee_fullname', $profile->fullname);
|
|
}
|
|
if ($profile->homepage) {
|
|
$req->set_parameter('omb_listenee_homepage', $profile->homepage);
|
|
}
|
|
if ($profile->bio) {
|
|
$req->set_parameter('omb_listenee_bio', $profile->bio);
|
|
}
|
|
if ($profile->location) {
|
|
$req->set_parameter('omb_listenee_location', $profile->location);
|
|
}
|
|
$avatar = $profile->getAvatar(AVATAR_PROFILE_SIZE);
|
|
if ($avatar) {
|
|
$req->set_parameter('omb_listenee_avatar', $avatar->url);
|
|
}
|
|
|
|
# XXX: add a nonce to prevent replay attacks
|
|
|
|
$req->set_parameter('oauth_callback', common_local_url('finishremotesubscribe'));
|
|
|
|
# XXX: test to see if endpoint accepts this signature method
|
|
|
|
$req->sign_request(omb_hmac_sha1(), $con, $tok);
|
|
|
|
# store all our info here
|
|
|
|
$omb['listenee'] = $user->nickname;
|
|
$omb['listener'] = omb_local_id($omb[OAUTH_ENDPOINT_REQUEST]);
|
|
$omb['token'] = $token;
|
|
$omb['secret'] = $secret;
|
|
# call doesn't work after bounce back so we cache; maybe serialization issue...?
|
|
$omb['access_token_url'] = omb_service_uri($omb[OAUTH_ENDPOINT_ACCESS]);
|
|
$omb['post_notice_url'] = omb_service_uri($omb[OMB_ENDPOINT_POSTNOTICE]);
|
|
$omb['update_profile_url'] = omb_service_uri($omb[OMB_ENDPOINT_UPDATEPROFILE]);
|
|
|
|
common_ensure_session();
|
|
|
|
$_SESSION['oauth_authorization_request'] = $omb;
|
|
|
|
# Redirect to authorization service
|
|
|
|
common_redirect($req->to_url());
|
|
return;
|
|
}
|
|
|
|
function make_nonce() {
|
|
return common_good_rand(16);
|
|
}
|
|
}
|