/usr/share/wordpress/wp-content/plugins/openid/server.php is in wordpress-openid 3.3.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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require_once 'Auth/OpenID/Server.php';
require_once dirname(__FILE__) . '/server_ext.php';
add_filter( 'xrds_simple', 'openid_provider_xrds_simple');
add_action( 'wp_head', 'openid_provider_link_tags');
/**
* Get the URL of the OpenID server endpoint.
*
* @see openid_service_url
*/
function openid_server_url() {
return openid_service_url('server', 'login_post');
}
/**
* Add XRDS entries for OpenID Server. Entries added will be highly
* dependant on the requested URL and plugin configuration.
*
* @uses apply_filters() Calls 'openid_server_xrds_types' before returning XRDS Types for OpenID authentication services.
*/
function openid_provider_xrds_simple($xrds) {
global $wp_roles;
if (!$wp_roles) $wp_roles = new WP_Roles();
$provider_enabled = false;
foreach ($wp_roles->role_names as $key => $name) {
$role = $wp_roles->get_role($key);
if ($role->has_cap('use_openid_provider')) {
$provider_enabled = true;
break;
}
}
if (!$provider_enabled) return $xrds;
$user = openid_server_requested_user();
if (!$user && get_option('openid_blog_owner')) {
$url_parts = parse_url(get_option('home'));
$path = array_key_exists('path', $url_parts) ? $url_parts['path'] : '';
$path = trailingslashit($path);
$script = preg_replace('/index.php$/', '', $_SERVER['SCRIPT_NAME']);
$script = trailingslashit($script);
if ($path != $script && !is_admin()) {
return $xrds;
}
if (!defined('OPENID_DISALLOW_OWNER') || !OPENID_DISALLOW_OWNER) {
$user = get_user_by('login', get_option('openid_blog_owner'));
}
}
if ($user) {
// if user doesn't have capability, bail
$user_object = new WP_User($user->ID);
if (!$user_object->has_cap('use_openid_provider')) return $xrds;
if (get_user_meta($user->ID, 'openid_delegate', true)) {
$services = get_user_meta($user->ID, 'openid_delegate_services', true);
} else {
$services = array();
$tmp_types = apply_filters('openid_server_xrds_types', array('http://specs.openid.net/auth/2.0/signon'));
$types = array();
foreach ($tmp_types as $t) {
$types[] = array('content' => $t);
}
$services[] = array(
'Type' => $types,
'URI' => openid_server_url(),
'LocalID' => get_author_posts_url($user->ID),
);
$tmp_types = apply_filters('openid_server_xrds_types', array('http://openid.net/signon/1.1'));
$types = array();
foreach ($tmp_types as $t) {
$types[] = array('content' => $t);
}
$services[] = array(
'Type' => $types,
'URI' => openid_server_url(),
'openid:Delegate' => get_author_posts_url($user->ID),
);
}
} else {
$services = array(
array(
'Type' => array(array('content' => 'http://specs.openid.net/auth/2.0/server')),
'URI' => openid_server_url(),
'LocalID' => 'http://specs.openid.net/auth/2.0/identifier_select',
)
);
}
if (!empty($services)) {
foreach ($services as $index => $service) {
$name = 'OpenID Provider Service (' . $index . ')';
$xrds = xrds_add_service($xrds, 'main', $name, $service, $index);
}
}
return $xrds;
}
/**
* Parse the request URL to determine which author is associated with it.
*
* @return bool|object false on failure, User DB row object
*/
function openid_server_requested_user() {
global $wp_rewrite;
if (array_key_exists('author', $_REQUEST) && $_REQUEST['author']) {
if (is_numeric($_REQUEST['author'])) {
return get_user_by('id', $_REQUEST['author']);
} else {
return get_user_by('login', $_REQUEST['author']);
}
} else {
$regex = preg_replace('/%author%/', '(.+)', $wp_rewrite->get_author_permastruct());
preg_match('|'.$regex.'|', $_SERVER['REQUEST_URI'], $matches);
if ($matches) {
$username = sanitize_user($matches[1], true);
return get_user_by('login', $username);
}
}
}
/**
* Process an OpenID Server request.
*
* @uses apply_filters() Calls 'openid_server_auth_response' before sending the authentication response.
*/
function openid_server_request() {
$server = openid_server();
// get OpenID request, either from session or HTTP request
$request = $server->decodeRequest();
if (!$request || Auth_OpenID_isError($request)) {
@session_start();
if ($_SESSION['openid_server_request']) {
$request = $_SESSION['openid_server_request'];
unset($_SESSION['openid_server_request']);
}
}
if (!$request || Auth_OpenID_isError($request)) {
$html = '<h1>This is an OpenID Server.</h1>';
if (Auth_OpenID_isError($request)) {
$html .= '<p><strong>Request Error:</strong> ' . $request->toString() . '</p>';
} else {
$html .= '<p>Nothing to see here… move along.</p>';
}
wp_die($html);
}
// process request
if (in_array($request->mode, array('checkid_immediate', 'checkid_setup'))) {
$response = openid_server_auth_request($request);
$response = apply_filters('openid_server_auth_response', $response);
} else {
$response = $server->handleRequest($request);
}
openid_server_process_response($response);
}
/**
* Process an OpenID Server authentication request.
*
* @uses do_action() Calls the 'openid_server_pre_auth' hook action before checking if the user is logged in.
* @uses do_action() Calls the 'openid_server_post_auth' hook action after ensuring that the user is logged in.
*/
function openid_server_auth_request($request) {
do_action('openid_server_pre_auth', $request);
// user must be logged in
if (!is_user_logged_in()) {
if ($request->mode == 'checkid_immediate') {
return $request->answer(false);
} else {
@session_start();
$_SESSION['openid_server_request'] = $request;
auth_redirect();
}
}
do_action('openid_server_post_auth', $request);
// get some user data
$user = wp_get_current_user();
$author_url = get_author_posts_url($user->ID);
$id_select = ($request->identity == 'http://specs.openid.net/auth/2.0/identifier_select');
// bail if user does not have access to OpenID provider
if (!$user->has_cap('use_openid_provider')) return $request->answer(false);
// bail if user doesn't own identity and not using id select
if (!$id_select && ($author_url != $request->identity)) {
return $request->answer(false);
}
// if using id select but user is delegating, display error to user (unless checkid_immediate)
if ($id_select && get_user_meta($user->ID, 'openid_delegate', true)) {
if ($request->mode != 'checkid_immediate') {
if ($_REQUEST['action'] == 'cancel') {
check_admin_referer('openid-server_cancel');
return $request->answer(false);
} else {
@session_start();
$_SESSION['openid_server_request'] = $request;
ob_start();
echo '<h1>'.__('OpenID Login Error', 'openid').'</h1>';
echo '<p>';
printf(__('Because you have delegated your OpenID, you cannot login with the URL <strong>%s</strong>. Instead, you must use your full OpenID when logging in.', 'openid'), trailingslashit(get_option('home')));
echo'</p>';
echo '<p>' . sprintf(__('Your full OpenID is: %s', 'openid'), '<strong>'.$author_url.'</strong>') . '</p>';
echo '
<form method="post">
<p class="submit">
<input type="submit" value="'.__('Continue').'" />
<input type="hidden" name="action" value="cancel" />
<input type="hidden" name="openid_server" value="1" />
</p>'
. wp_nonce_field('openid-server_cancel', '_wpnonce', true, false)
.'</form>';
$html = ob_get_contents();
ob_end_clean();
wp_die($html, 'OpenID Login Error');
}
}
}
// if user trusts site, we're done
$trusted_sites = get_user_meta($user->ID, 'openid_trusted_sites', true);
$site_hash = md5($request->trust_root);
if (is_array($trusted_sites) && array_key_exists($site_hash, $trusted_sites)) {
$trusted_sites[$site_hash]['last_login'] = time();
update_user_meta($user->ID, 'openid_trusted_sites', $trusted_sites);
if ($id_select) {
return $request->answer(true, null, $author_url);
} else {
return $request->answer(true);
}
}
// that's all we can do without interacting with the user... bail if using immediate
if ($request->mode == 'checkid_immediate') {
return $request->answer(false);
}
// finally, prompt the user to trust this site
if (openid_server_user_trust($request)) {
if ($id_select) {
return $request->answer(true, null, $author_url);
} else {
return $request->answer(true);
}
} else {
return $request->answer(false);
}
}
/**
* Check that the current user's author URL matches the claimed URL.
*
* @param string $claimed claimed url
* @return bool whether the current user matches the claimed URL
*/
function openid_server_check_user_login($claimed) {
$user = wp_get_current_user();
if (!$user) return false;
$identifier = get_author_posts_url($user->ID);
return ($claimed == $identifier);
}
/**
* Process OpenID server response
*
* @param object $response response object
*/
function openid_server_process_response($response) {
$server = openid_server();
$web_response = $server->encodeResponse($response);
if ($web_response->code != AUTH_OPENID_HTTP_OK) {
header(sprintf('HTTP/1.1 %d', $web_response->code), true, $web_response->code);
}
foreach ($web_response->headers as $k => $v) {
header("$k: $v");
}
print $web_response->body;
exit;
}
/**
* Get Auth_OpenID_Server singleton.
*
* @return object Auth_OpenID_Server singleton instance
*/
function openid_server() {
static $server;
if (!$server || !is_a($server, 'Auth_OpenID_Server')) {
$server = new Auth_OpenID_Server(openid_getStore(), openid_server_url());
}
return $server;
}
/**
* Add OpenID HTML link tags when appropriate.
*/
function openid_provider_link_tags() {
if (is_front_page()) {
if (!defined('OPENID_DISALLOW_OWNER') || !OPENID_DISALLOW_OWNER) {
$user = get_user_by('login', get_option('openid_blog_owner'));
}
} else if (is_author()) {
global $wp_query;
$user = $wp_query->get_queried_object();
}
if ( isset($user) && $user) {
// if user doesn't have capability, bail
$user_object = new WP_User($user->ID);
if (!$user_object->has_cap('use_openid_provider')) return;
if (get_user_meta($user->ID, 'openid_delegate', true)) {
$services = get_user_meta($user->ID, 'openid_delegate_services', true);
$openid_1 = false;
$openid_2 = false;
foreach($services as $service) {
if (!$openid_1 && $service['openid:Delegate']) {
echo '
<link rel="openid.server" href="'.$service['URI'].'" />
<link rel="openid.delegate" href="'.$service['openid:Delegate'].'" />';
$openid_1 = true;
}
if (!$openid_2 && $service['LocalID']) {
echo '
<link rel="openid2.provider" href="'.$service['URI'].'" />
<link rel="openid2.local_id" href="'.$service['LocalID'].'" />';
$openid_2 = true;
}
}
} else {
$server = openid_server_url();
$identifier = get_author_posts_url($user->ID);
echo '
<link rel="openid2.provider" href="'.$server.'" />
<link rel="openid2.local_id" href="'.$identifier.'" />
<link rel="openid.server" href="'.$server.'" />
<link rel="openid.delegate" href="'.$identifier.'" />';
}
}
}
function openid_server_add_trust_site($user_id, $site_url, $site_name = null, $release_attributes) {
}
function openid_server_remove_trust_site() {
}
/**
* Determine if the current user trusts the the relying party of the OpenID authentication request.
*
* @uses do_action() Calls the 'openid_server_trust_form' hook action when displaying the trust form.
* @uses do_action() Calls the 'openid_server_trust_submit' hook action when processing the submitted trust form.
* @uses apply_filters() Calls 'openid_server_store_trusted_site' before storing trusted site data.
*/
function openid_server_user_trust($request) {
$user = wp_get_current_user();
if ($_REQUEST['openid_trust']) {
$trust = null;
if ($_REQUEST['openid_trust'] == 'cancel') {
$trust = false;
} else {
check_admin_referer('openid-server_trust');
$trust = true;
}
do_action('openid_server_trust_submit', $trust, $request);
if ($trust) {
// store trusted site (unless hidden constant is set)
if (!defined('OPENID_NO_AUTO_TRUST') || !OPENID_NO_AUTO_TRUST) {
$site = array( 'url' => $request->trust_root, 'last_login' => time());
$site = apply_filters('openid_server_store_trusted_site', $site);
$trusted_sites = get_user_meta($user->ID, 'openid_trusted_sites', true);
$site_hash = md5($request->trust_root);
$trusted_sites[$site_hash] = $site;
update_user_meta($user->ID, 'openid_trusted_sites', $trusted_sites);
}
}
return $trust;
} else {
// prompt the user to make a trust decision
@session_start();
$_SESSION['openid_server_request'] = $request;
ob_start();
echo '
<style type="text/css">
#banner { margin-bottom: 4em; }
#banner #site { float: left; color: #555; }
#banner #loggedin { font-size: 0.7em; float: right; }
p.trust_form_add {
margin: 3em auto 1em; padding: 0.5em; border: 1px solid #999; background: #FFEBE8; width: 80%; font-size: 0.8em; -moz-border-radius: 3px;
}
#submit { font-size: 18px; padding: 10px 35px; margin-left: 1em; }
</style>
<div id="banner">
<div id="site">'.get_option('blogname').'</div>';
if (is_user_logged_in()) {
$user = wp_get_current_user();
$logout_url = site_url('wp-login.php?action=logout&redirect_to=' . urlencode(openid_server_url()), 'login');
echo '
<div id="loggedin">' . sprintf(__('Logged in as %1$s (%2$s). <a href="%3$s">Use a different account?</a>', 'openid'), $user->display_name, $user->user_login, $logout_url ) . '</div>';
}
echo '
</div>
<form action="' . openid_server_url() . '" method="post">
<h1>'.__('Verify Your Identity', 'openid').'</h1>
<p style="margin: 1.5em 0 1em 0;">'
. sprintf(__('%s has asked to verify your identity.', 'openid'), '<strong>'.$request->trust_root.'</strong>')
. '</p>
<p style="margin: 1em 0;">'
. __('Click <strong>Continue</strong> to verify your identity and login without creating a new password.', 'openid')
. '</p>';
do_action('openid_server_trust_form');
echo '
<p class="submit" style="text-align: center; margin-top: 2.4em;">
<a href="' . add_query_arg('openid_trust', 'cancel', openid_server_url()) . '">'.__('Cancel and go back', 'openid').'</a>
<input type="submit" id="submit" name="openid_trust" value="'.__('Continue', 'openid').'" />
</p>
<p style="margin: 3em 0 1em 0; font-size: 0.8em;">'
. sprintf(__('Manage or remove access on the <a href="%s" target="_blank">Trusted Sites</a> page.', 'openid'),
admin_url((current_user_can('edit_users') ? 'users.php' : 'profile.php') . '?page=openid_trusted_sites'))
. '</p>
<p style="margin: 1em 0; font-size: 0.8em;">'
. sprintf(__('<a href="%s" target="_blank">Edit your profile</a> to change the information that gets shared with Trusted Sites.', 'openid'), admin_url('profile.php'))
. '</p>
';
wp_nonce_field('openid-server_trust', '_wpnonce', true);
echo '
</form>';
$html = ob_get_contents();
ob_end_clean();
openid_page($html, __('Verify Your Identity', 'openid'));
}
}
/**
* Discover and cache OpenID services for a user's delegate OpenID.
*
* @param int $userid user ID
* @url string URL to discover. If not provided, user's current delegate will be used
* @return bool true if successful
*/
function openid_server_get_delegation_info($userid, $url = null) {
if (empty($url)) $url = get_user_meta($userid, 'openid_delegate', true);
if (empty($url)) return false;
$fetcher = Auth_Yadis_Yadis::getHTTPFetcher();
$discoveryResult = Auth_Yadis_Yadis::discover($url, $fetcher);
$endpoints = Auth_OpenID_ServiceEndpoint::fromDiscoveryResult($discoveryResult);
$services = array();
if (!empty($endpoints)) {
foreach ($endpoints as $endpoint) {
$service = array(
'Type' => array(),
'URI' => $endpoint->server_url,
);
foreach ($endpoint->type_uris as $type) {
$service['Type'][] = array('content' => $type);
if ($type == Auth_OpenID_TYPE_2_0_IDP) {
$service['LocalID'] = Auth_OpenID_IDENTIFIER_SELECT;
} else if ($type == Auth_OpenID_TYPE_2_0) {
$service['LocalID'] = $endpoint->local_id;
} else if (in_array($type, array(Auth_OpenID_TYPE_1_0, Auth_OpenID_TYPE_1_1, Auth_OpenID_TYPE_1_2))) {
$service['openid:Delegate'] = $endpoint->local_id;
}
}
$services[] = $service;
}
}
if (empty($services)) {
// resort to checking for HTML links
$response = $fetcher->get($url);
$html_content = $response->body;
$p = new Auth_OpenID_Parse();
$link_attrs = $p->parseLinkAttrs($html_content);
// check HTML for OpenID2
$server_url = $p->findFirstHref($link_attrs, 'openid2.provider');
if ($server_url !== null) {
$openid_url = $p->findFirstHref($link_attrs, 'openid2.local_id');
if ($openid_url == null) $openid_url = $url;
$services[] = array(
'Type' => array(array('content' => Auth_OpenID_Type_1_1)),
'URI' => $server_url,
'LocalID' => $openid_url,
);
}
// check HTML for OpenID1
$server_url = $p->findFirstHref($link_attrs, 'openid.server');
if ($server_url !== null) {
$openid_url = $p->findFirstHref($link_attrs, 'openid.delegate');
if ($openid_url == null) $openid_url = $url;
$services[] = array(
'Type' => array(array('content' => Auth_OpenID_Type_2_0)),
'URI' => $server_url,
'openid:Delegate' => $openid_url,
);
}
}
if (empty($services)) return false;
return array(
'url' => $url,
'services' => $services
);
}
?>
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