gnu-social/actions/userauthorization.php

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<?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');
define('TIMESTAMP_THRESHOLD', 300);
class UserauthorizationAction extends Action
{
var $error;
var $req;
function handle($args)
{
parent::handle($args);
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
# CSRF protection
$token = $this->trimmed('token');
if (!$token || $token != common_session_token()) {
$req = $this->getStoredRequest();
$this->showForm($req, _('There was a problem with your session token. '.
'Try again, please.'));
return;
}
# We've shown the form, now post user's choice
$this->sendAuthorization();
} else {
if (!common_logged_in()) {
# Go log in, and then come back
common_set_returnto($_SERVER['REQUEST_URI']);
common_redirect(common_local_url('login'));
return;
}
try {
# this must be a new request
$req = $this->getNewRequest();
if (!$req) {
$this->clientError(_('No request found!'));
}
# XXX: only validate new requests, since nonce is one-time use
$this->validateRequest($req);
$this->storeRequest($req);
$this->showForm($req);
} catch (OAuthException $e) {
$this->clearRequest();
$this->clientError($e->getMessage());
return;
}
}
}
function showForm($req, $error=null)
{
$this->req = $req;
$this->error = $error;
$this->showPage();
}
function title()
{
return _('Authorize subscription');
}
function showPageNotice()
{
$this->element('p', null, _('Please check these details to make sure '.
'that you want to subscribe to this user\'s notices. '.
'If you didn\'t just ask to subscribe to someone\'s notices, '.
2009-01-26 13:20:19 +00:00
'click "Reject".'));
}
function showContent()
{
$req = $this->req;
$nickname = $req->get_parameter('omb_listenee_nickname');
$profile = $req->get_parameter('omb_listenee_profile');
$license = $req->get_parameter('omb_listenee_license');
$fullname = $req->get_parameter('omb_listenee_fullname');
$homepage = $req->get_parameter('omb_listenee_homepage');
$bio = $req->get_parameter('omb_listenee_bio');
$location = $req->get_parameter('omb_listenee_location');
$avatar = $req->get_parameter('omb_listenee_avatar');
$this->elementStart('div', 'profile');
if ($avatar) {
$this->element('img', array('src' => $avatar,
'class' => 'avatar',
'width' => AVATAR_PROFILE_SIZE,
'height' => AVATAR_PROFILE_SIZE,
'alt' => $nickname));
}
$this->element('a', array('href' => $profile,
'class' => 'external profile nickname'),
$nickname);
if ($fullname) {
$this->elementStart('div', 'fullname');
if ($homepage) {
$this->element('a', array('href' => $homepage),
$fullname);
} else {
$this->text($fullname);
}
$this->elementEnd('div');
}
if ($location) {
$this->element('div', 'location', $location);
}
if ($bio) {
$this->element('div', 'bio', $bio);
}
$this->elementStart('div', 'license');
$this->element('a', array('href' => $license,
'class' => 'license'),
$license);
$this->elementEnd('div');
$this->elementEnd('div');
$this->elementStart('form', array('method' => 'post',
'id' => 'userauthorization',
'name' => 'userauthorization',
'action' => common_local_url('userauthorization')));
$this->hidden('token', common_session_token());
$this->submit('accept', _('Accept'));
$this->submit('reject', _('Reject'));
$this->elementEnd('form');
}
function sendAuthorization()
{
$req = $this->getStoredRequest();
if (!$req) {
$this->clientError(_('No authorization request!'));
return;
}
$callback = $req->get_parameter('oauth_callback');
if ($this->arg('accept')) {
if (!$this->authorizeToken($req)) {
$this->clientError(_('Error authorizing token'));
}
if (!$this->saveRemoteProfile($req)) {
$this->clientError(_('Error saving remote profile'));
}
if (!$callback) {
$this->showAcceptMessage($req->get_parameter('oauth_token'));
} else {
$params = array();
$params['oauth_token'] = $req->get_parameter('oauth_token');
$params['omb_version'] = OMB_VERSION_01;
$user = User::staticGet('uri', $req->get_parameter('omb_listener'));
$profile = $user->getProfile();
if (!$profile) {
common_log_db_error($user, 'SELECT', __FILE__);
$this->serverError(_('User without matching profile'));
return;
}
$params['omb_listener_nickname'] = $user->nickname;
$params['omb_listener_profile'] = common_local_url('showstream',
array('nickname' => $user->nickname));
if ($profile->fullname) {
$params['omb_listener_fullname'] = $profile->fullname;
}
if ($profile->homepage) {
$params['omb_listener_homepage'] = $profile->homepage;
}
if ($profile->bio) {
$params['omb_listener_bio'] = $profile->bio;
}
if ($profile->location) {
$params['omb_listener_location'] = $profile->location;
}
$avatar = $profile->getAvatar(AVATAR_PROFILE_SIZE);
if ($avatar) {
$params['omb_listener_avatar'] = $avatar->url;
}
$parts = array();
foreach ($params as $k => $v) {
$parts[] = $k . '=' . OAuthUtil::urlencodeRFC3986($v);
}
$query_string = implode('&', $parts);
$parsed = parse_url($callback);
$url = $callback . (($parsed['query']) ? '&' : '?') . $query_string;
common_redirect($url, 303);
}
} else {
if (!$callback) {
$this->showRejectMessage();
} else {
# XXX: not 100% sure how to signal failure... just redirect without token?
common_redirect($callback, 303);
}
}
}
function authorizeToken(&$req)
{
$consumer_key = $req->get_parameter('oauth_consumer_key');
$token_field = $req->get_parameter('oauth_token');
$rt = new Token();
$rt->consumer_key = $consumer_key;
$rt->tok = $token_field;
$rt->type = 0;
$rt->state = 0;
if ($rt->find(true)) {
$orig_rt = clone($rt);
$rt->state = 1; # Authorized but not used
if ($rt->update($orig_rt)) {
return true;
}
}
return false;
}
# XXX: refactor with similar code in finishremotesubscribe.php
function saveRemoteProfile(&$req)
{
# FIXME: we should really do this when the consumer comes
# back for an access token. If they never do, we've got stuff in a
# weird state.
$nickname = $req->get_parameter('omb_listenee_nickname');
$fullname = $req->get_parameter('omb_listenee_fullname');
$profile_url = $req->get_parameter('omb_listenee_profile');
$homepage = $req->get_parameter('omb_listenee_homepage');
$bio = $req->get_parameter('omb_listenee_bio');
$location = $req->get_parameter('omb_listenee_location');
$avatar_url = $req->get_parameter('omb_listenee_avatar');
$listenee = $req->get_parameter('omb_listenee');
$remote = Remote_profile::staticGet('uri', $listenee);
if ($remote) {
$exists = true;
$profile = Profile::staticGet($remote->id);
$orig_remote = clone($remote);
$orig_profile = clone($profile);
} else {
$exists = false;
$remote = new Remote_profile();
$remote->uri = $listenee;
$profile = new Profile();
}
$profile->nickname = $nickname;
$profile->profileurl = $profile_url;
if ($fullname) {
$profile->fullname = $fullname;
}
if ($homepage) {
$profile->homepage = $homepage;
}
if ($bio) {
$profile->bio = $bio;
}
if ($location) {
$profile->location = $location;
}
if ($exists) {
$profile->update($orig_profile);
} else {
$profile->created = DB_DataObject_Cast::dateTime(); # current time
$id = $profile->insert();
if (!$id) {
return false;
}
$remote->id = $id;
}
if ($exists) {
if (!$remote->update($orig_remote)) {
return false;
}
} else {
$remote->created = DB_DataObject_Cast::dateTime(); # current time
if (!$remote->insert()) {
return false;
}
}
if ($avatar_url) {
if (!$this->addAvatar($profile, $avatar_url)) {
return false;
}
}
$user = common_current_user();
$datastore = omb_oauth_datastore();
$consumer = $this->getConsumer($datastore, $req);
$token = $this->getToken($datastore, $req, $consumer);
$sub = new Subscription();
$sub->subscriber = $user->id;
$sub->subscribed = $remote->id;
$sub->token = $token->key; # NOTE: request token, not valid for use!
$sub->created = DB_DataObject_Cast::dateTime(); # current time
if (!$sub->insert()) {
return false;
}
return true;
}
function addAvatar($profile, $url)
{
$temp_filename = tempnam(sys_get_temp_dir(), 'listenee_avatar');
copy($url, $temp_filename);
$imagefile = new ImageFile($profile->id, $temp_filename);
$filename = Avatar::filename($profile->id,
image_type_to_extension($imagefile->type),
null,
common_timestamp());
rename($temp_filename, Avatar::path($filename));
return $profile->setOriginal($filename);
}
function showAcceptMessage($tok)
{
common_show_header(_('Subscription authorized'));
$this->element('p', null,
_('The subscription has been authorized, but no '.
'callback URL was passed. Check with the site\'s instructions for '.
'details on how to authorize the subscription. Your subscription token is:'));
$this->element('blockquote', 'token', $tok);
common_show_footer();
}
function showRejectMessage($tok)
{
common_show_header(_('Subscription rejected'));
$this->element('p', null,
_('The subscription has been rejected, but no '.
'callback URL was passed. Check with the site\'s instructions for '.
'details on how to fully reject the subscription.'));
common_show_footer();
}
function storeRequest($req)
{
common_ensure_session();
$_SESSION['userauthorizationrequest'] = $req;
}
function clearRequest()
{
common_ensure_session();
unset($_SESSION['userauthorizationrequest']);
}
function getStoredRequest()
{
common_ensure_session();
$req = $_SESSION['userauthorizationrequest'];
return $req;
}
function getNewRequest()
{
common_remove_magic_from_request();
$req = OAuthRequest::from_request();
return $req;
}
# Throws an OAuthException if anything goes wrong
function validateRequest(&$req)
{
# OAuth stuff -- have to copy from OAuth.php since they're
# all private methods, and there's no user-authentication method
$this->checkVersion($req);
$datastore = omb_oauth_datastore();
$consumer = $this->getConsumer($datastore, $req);
$token = $this->getToken($datastore, $req, $consumer);
$this->checkTimestamp($req);
$this->checkNonce($datastore, $req, $consumer, $token);
$this->checkSignature($req, $consumer, $token);
$this->validateOmb($req);
return true;
}
function validateOmb(&$req)
{
foreach (array('omb_version', 'omb_listener', 'omb_listenee',
'omb_listenee_profile', 'omb_listenee_nickname',
'omb_listenee_license') as $param)
{
if (!$req->get_parameter($param)) {
throw new OAuthException("Required parameter '$param' not found");
}
}
# Now, OMB stuff
$version = $req->get_parameter('omb_version');
if ($version != OMB_VERSION_01) {
throw new OAuthException("OpenMicroBlogging version '$version' not supported");
}
$listener = $req->get_parameter('omb_listener');
$user = User::staticGet('uri', $listener);
if (!$user) {
throw new OAuthException("Listener URI '$listener' not found here");
}
$cur = common_current_user();
if ($cur->id != $user->id) {
throw new OAuthException("Can't add for another user!");
}
$listenee = $req->get_parameter('omb_listenee');
if (!Validate::uri($listenee) &&
!common_valid_tag($listenee)) {
throw new OAuthException("Listenee URI '$listenee' not a recognizable URI");
}
if (strlen($listenee) > 255) {
throw new OAuthException("Listenee URI '$listenee' too long");
}
$other = User::staticGet('uri', $listenee);
if ($other) {
throw new OAuthException("Listenee URI '$listenee' is local user");
}
$remote = Remote_profile::staticGet('uri', $listenee);
if ($remote) {
$sub = new Subscription();
$sub->subscriber = $user->id;
$sub->subscribed = $remote->id;
if ($sub->find(true)) {
throw new OAuthException("Already subscribed to user!");
}
}
$nickname = $req->get_parameter('omb_listenee_nickname');
if (!Validate::string($nickname, array('min_length' => 1,
'max_length' => 64,
'format' => VALIDATE_NUM . VALIDATE_ALPHA_LOWER))) {
throw new OAuthException('Nickname must have only letters and numbers and no spaces.');
}
$profile = $req->get_parameter('omb_listenee_profile');
if (!common_valid_http_url($profile)) {
throw new OAuthException("Invalid profile URL '$profile'.");
}
if ($profile == common_local_url('showstream', array('nickname' => $nickname))) {
throw new OAuthException("Profile URL '$profile' is for a local user.");
}
$license = $req->get_parameter('omb_listenee_license');
if (!common_valid_http_url($license)) {
throw new OAuthException("Invalid license URL '$license'.");
}
$site_license = common_config('license', 'url');
if (!common_compatible_license($license, $site_license)) {
throw new OAuthException("Listenee stream license '$license' not compatible with site license '$site_license'.");
}
# optional stuff
$fullname = $req->get_parameter('omb_listenee_fullname');
if ($fullname && mb_strlen($fullname) > 255) {
throw new OAuthException("Full name '$fullname' too long.");
}
$homepage = $req->get_parameter('omb_listenee_homepage');
if ($homepage && (!common_valid_http_url($homepage) || mb_strlen($homepage) > 255)) {
throw new OAuthException("Invalid homepage '$homepage'");
}
$bio = $req->get_parameter('omb_listenee_bio');
if ($bio && mb_strlen($bio) > 140) {
throw new OAuthException("Bio too long '$bio'");
}
$location = $req->get_parameter('omb_listenee_location');
if ($location && mb_strlen($location) > 255) {
throw new OAuthException("Location too long '$location'");
}
$avatar = $req->get_parameter('omb_listenee_avatar');
if ($avatar) {
if (!common_valid_http_url($avatar) || strlen($avatar) > 255) {
throw new OAuthException("Invalid avatar URL '$avatar'");
}
$size = @getimagesize($avatar);
if (!$size) {
throw new OAuthException("Can't read avatar URL '$avatar'");
}
if ($size[0] != AVATAR_PROFILE_SIZE || $size[1] != AVATAR_PROFILE_SIZE) {
throw new OAuthException("Wrong size image at '$avatar'");
}
if (!in_array($size[2], array(IMAGETYPE_GIF, IMAGETYPE_JPEG,
IMAGETYPE_PNG))) {
throw new OAuthException("Wrong image type for '$avatar'");
}
}
$callback = $req->get_parameter('oauth_callback');
if ($callback && !common_valid_http_url($callback)) {
throw new OAuthException("Invalid callback URL '$callback'");
}
if ($callback && $callback == common_local_url('finishremotesubscribe')) {
throw new OAuthException("Callback URL '$callback' is for local site.");
}
}
# Snagged from OAuthServer
function checkVersion(&$req)
{
$version = $req->get_parameter("oauth_version");
if (!$version) {
$version = 1.0;
}
if ($version != 1.0) {
throw new OAuthException("OAuth version '$version' not supported");
}
return $version;
}
# Snagged from OAuthServer
function getConsumer($datastore, $req)
{
$consumer_key = @$req->get_parameter("oauth_consumer_key");
if (!$consumer_key) {
throw new OAuthException("Invalid consumer key");
}
$consumer = $datastore->lookup_consumer($consumer_key);
if (!$consumer) {
throw new OAuthException("Invalid consumer");
}
return $consumer;
}
# Mostly cadged from OAuthServer
function getToken($datastore, &$req, $consumer)
{/*{{{*/
$token_field = @$req->get_parameter('oauth_token');
$token = $datastore->lookup_token($consumer, 'request', $token_field);
if (!$token) {
throw new OAuthException("Invalid $token_type token: $token_field");
}
return $token;
}
function checkTimestamp(&$req)
{
$timestamp = @$req->get_parameter('oauth_timestamp');
$now = time();
if ($now - $timestamp > TIMESTAMP_THRESHOLD) {
throw new OAuthException("Expired timestamp, yours $timestamp, ours $now");
}
}
# NOTE: don't call twice on the same request; will fail!
function checkNonce(&$datastore, &$req, $consumer, $token)
{
$timestamp = @$req->get_parameter('oauth_timestamp');
$nonce = @$req->get_parameter('oauth_nonce');
$found = $datastore->lookup_nonce($consumer, $token, $nonce, $timestamp);
if ($found) {
throw new OAuthException("Nonce already used");
}
return true;
}
function checkSignature(&$req, $consumer, $token)
{
$signature_method = $this->getSignatureMethod($req);
$signature = $req->get_parameter('oauth_signature');
$valid_sig = $signature_method->check_signature($req,
$consumer,
$token,
$signature);
if (!$valid_sig) {
throw new OAuthException("Invalid signature");
}
}
function getSignatureMethod(&$req)
{
$signature_method = @$req->get_parameter("oauth_signature_method");
if (!$signature_method) {
$signature_method = "PLAINTEXT";
}
if ($signature_method != 'HMAC-SHA1') {
throw new OAuthException("Signature method '$signature_method' not supported.");
}
return omb_hmac_sha1();
}
}