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<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
/**
* Jetpack_SSO module main class file.
*
* @package automattic/jetpack
*/
use Automattic\Jetpack\Connection\Manager as Connection_Manager;
use Automattic\Jetpack\Roles;
use Automattic\Jetpack\Status;
use Automattic\Jetpack\Status\Host;
use Automattic\Jetpack\Tracking;
require_once JETPACK__PLUGIN_DIR . 'modules/sso/class.jetpack-sso-helpers.php';
require_once JETPACK__PLUGIN_DIR . 'modules/sso/class.jetpack-sso-notices.php';
/**
* Module Name: Secure Sign On
* Module Description: Allow users to log in to this site using WordPress.com accounts
* Sort Order: 30
* Recommendation Order: 5
* First Introduced: 2.6
* Requires Connection: Yes
* Requires User Connection: Yes
* Auto Activate: No
* Module Tags: Developers
* Feature: Security
* Additional Search Queries: sso, single sign on, login, log in, 2fa, two-factor
*/
class Jetpack_SSO {
/**
* Jetpack_SSO instance.
*
* @var Jetpack_SSO
*/
public static $instance = null;
/**
* Jetpack_SSO constructor.
*/
private function __construct() {
self::$instance = $this;
add_action( 'admin_init', array( $this, 'maybe_authorize_user_after_sso' ), 1 );
add_action( 'admin_init', array( $this, 'register_settings' ) );
add_action( 'login_init', array( $this, 'login_init' ) );
add_action( 'delete_user', array( $this, 'delete_connection_for_user' ) );
add_filter( 'jetpack_xmlrpc_methods', array( $this, 'xmlrpc_methods' ) );
add_action( 'init', array( $this, 'maybe_logout_user' ), 5 );
add_action( 'jetpack_modules_loaded', array( $this, 'module_configure_button' ) );
add_action( 'login_form_logout', array( $this, 'store_wpcom_profile_cookies_on_logout' ) );
add_action( 'jetpack_unlinked_user', array( $this, 'delete_connection_for_user' ) );
add_action( 'jetpack_site_before_disconnected', array( static::class, 'disconnect' ) );
add_action( 'wp_login', array( 'Jetpack_SSO', 'clear_cookies_after_login' ) );
// Adding this action so that on login_init, the action won't be sanitized out of the $action global.
add_action( 'login_form_jetpack-sso', '__return_true' );
add_filter( 'wp_login_errors', array( $this, 'sso_reminder_logout_wpcom' ) );
/**
* Filter to include Force 2FA feature.
*
* By default, `manage_options` users are forced when enable. The capability can be modified
* with the `jetpack_force_2fa_cap` filter.
*
* To enable the feature, add the following code:
* add_filter( 'jetpack_force_2fa', '__return_true' );
*
* @param bool $force_2fa Whether to force 2FA or not.
*
* @todo Provide a UI to enable/disable the feature.
*
* @since 12.7
* @module SSO
* @return bool
*/
if ( ! class_exists( 'Jetpack_Force_2FA' ) && apply_filters( 'jetpack_force_2fa', false ) ) {
// Checking for the class to avoid collisions with existing standalone Jetpack Force 2FA plugin and break out if so.
require_once JETPACK__PLUGIN_DIR . 'modules/sso/class-jetpack-force-2fa.php';
new Jetpack_Force_2FA();
}
}
/**
* Returns the single instance of the Jetpack_SSO object
*
* @since 2.8
* @return Jetpack_SSO
**/
public static function get_instance() {
if ( self::$instance !== null ) {
return self::$instance;
}
self::$instance = new Jetpack_SSO();
return self::$instance;
}
/**
* Add configure button and functionality to the module card on the Jetpack screen
**/
public static function module_configure_button() {
Jetpack::enable_module_configurable( __FILE__ );
}
/**
* Safety heads-up added to the logout messages when SSO is enabled.
* Some folks on a shared computer don't know that they need to log out of WordPress.com as well.
*
* @param WP_Error $errors WP_Error object.
*/
public function sso_reminder_logout_wpcom( $errors ) {
if ( ( new Host() )->is_wpcom_platform() ) {
return $errors;
}
if ( ! empty( $errors->errors['loggedout'] ) ) {
$logout_message = wp_kses(
sprintf(
/* translators: %1$s is a link to the WordPress.com account settings page. */
__( 'If you are on a shared computer, remember to also <a href="%1$s">log out of WordPress.com</a>.', 'jetpack' ),
'https://wordpress.com/me'
),
array(
'a' => array(
'href' => array(),
),
)
);
$errors->add( 'jetpack-sso-show-logout', $logout_message, 'message' );
}
return $errors;
}
/**
* If jetpack_force_logout == 1 in current user meta the user will be forced
* to logout and reauthenticate with the site.
**/
public function maybe_logout_user() {
global $current_user;
if ( 1 === (int) $current_user->jetpack_force_logout ) {
delete_user_meta( $current_user->ID, 'jetpack_force_logout' );
self::delete_connection_for_user( $current_user->ID );
wp_logout();
wp_safe_redirect( wp_login_url() );
exit;
}
}
/**
* Adds additional methods the WordPress xmlrpc API for handling SSO specific features
*
* @param array $methods API methods.
* @return array
**/
public function xmlrpc_methods( $methods ) {
$methods['jetpack.userDisconnect'] = array( $this, 'xmlrpc_user_disconnect' );
return $methods;
}
/**
* Marks a user's profile for disconnect from WordPress.com and forces a logout
* the next time the user visits the site.
*
* @param int $user_id User to disconnect from the site.
**/
public function xmlrpc_user_disconnect( $user_id ) {
$user_query = new WP_User_Query(
array(
'meta_key' => 'wpcom_user_id',
'meta_value' => $user_id,
)
);
$user = $user_query->get_results();
$user = $user[0];
if ( $user instanceof WP_User ) {
$user = wp_set_current_user( $user->ID );
update_user_meta( $user->ID, 'jetpack_force_logout', '1' );
self::delete_connection_for_user( $user->ID );
return true;
}
return false;
}
/**
* Enqueues scripts and styles necessary for SSO login.
*/
public function login_enqueue_scripts() {
global $action;
if ( ! Jetpack_SSO_Helpers::display_sso_form_for_action( $action ) ) {
return;
}
if ( is_rtl() ) {
wp_enqueue_style( 'jetpack-sso-login', plugins_url( 'modules/sso/jetpack-sso-login-rtl.css', JETPACK__PLUGIN_FILE ), array( 'login', 'genericons' ), JETPACK__VERSION );
} else {
wp_enqueue_style( 'jetpack-sso-login', plugins_url( 'modules/sso/jetpack-sso-login.css', JETPACK__PLUGIN_FILE ), array( 'login', 'genericons' ), JETPACK__VERSION );
}
wp_enqueue_script( 'jetpack-sso-login', plugins_url( 'modules/sso/jetpack-sso-login.js', JETPACK__PLUGIN_FILE ), array( 'jquery' ), JETPACK__VERSION, false );
}
/**
* Adds Jetpack SSO classes to login body
*
* @param array $classes Array of classes to add to body tag.
* @return array Array of classes to add to body tag.
*/
public function login_body_class( $classes ) {
global $action;
if ( ! Jetpack_SSO_Helpers::display_sso_form_for_action( $action ) ) {
return $classes;
}
// Always add the jetpack-sso class so that we can add SSO specific styling even when the SSO form isn't being displayed.
$classes[] = 'jetpack-sso';
if ( ! ( new Status() )->is_staging_site() ) {
/**
* Should we show the SSO login form?
*
* $_GET['jetpack-sso-default-form'] is used to provide a fallback in case JavaScript is not enabled.
*
* The default_to_sso_login() method allows us to dynamically decide whether we show the SSO login form or not.
* The SSO module uses the method to display the default login form if we can not find a user to log in via SSO.
* But, the method could be filtered by a site admin to always show the default login form if that is preferred.
*/
if ( empty( $_GET['jetpack-sso-show-default-form'] ) && Jetpack_SSO_Helpers::show_sso_login() ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
$classes[] = 'jetpack-sso-form-display';
}
}
return $classes;
}
/**
* Inlined admin styles for SSO.
*/
public function print_inline_admin_css() {
?>
<style>
.jetpack-sso .message {
margin-top: 20px;
}
.jetpack-sso #login .message:first-child,
.jetpack-sso #login h1 + .message {
margin-top: 0;
}
</style>
<?php
}
/**
* Adds settings fields to Settings > General > Secure Sign On that allows users to
* turn off the login form on wp-login.php
*
* @since 2.7
**/
public function register_settings() {
add_settings_section(
'jetpack_sso_settings',
__( 'Secure Sign On', 'jetpack' ),
'__return_false',
'jetpack-sso'
);
/*
* Settings > General > Secure Sign On
* Require two step authentication
*/
register_setting(
'jetpack-sso',
'jetpack_sso_require_two_step',
array( $this, 'validate_jetpack_sso_require_two_step' )
);
add_settings_field(
'jetpack_sso_require_two_step',
'', // Output done in render $callback: __( 'Require Two-Step Authentication' , 'jetpack' ).
array( $this, 'render_require_two_step' ),
'jetpack-sso',
'jetpack_sso_settings'
);
/*
* Settings > General > Secure Sign On
*/
register_setting(
'jetpack-sso',
'jetpack_sso_match_by_email',
array( $this, 'validate_jetpack_sso_match_by_email' )
);
add_settings_field(
'jetpack_sso_match_by_email',
'', // Output done in render $callback: __( 'Match by Email' , 'jetpack' ).
array( $this, 'render_match_by_email' ),
'jetpack-sso',
'jetpack_sso_settings'
);
}
/**
* Builds the display for the checkbox allowing user to require two step
* auth be enabled on WordPress.com accounts before login. Displays in Settings > General
*
* @since 2.7
**/
public function render_require_two_step() {
?>
<label>
<input
type="checkbox"
name="jetpack_sso_require_two_step"
<?php checked( Jetpack_SSO_Helpers::is_two_step_required() ); ?>
<?php disabled( Jetpack_SSO_Helpers::is_require_two_step_checkbox_disabled() ); ?>
>
<?php esc_html_e( 'Require Two-Step Authentication', 'jetpack' ); ?>
</label>
<?php
}
/**
* Validate the require two step checkbox in Settings > General.
*
* @param bool $input The jetpack_sso_require_two_step option setting.
*
* @since 2.7
* @return boolean
**/
public function validate_jetpack_sso_require_two_step( $input ) {
return ( ! empty( $input ) ) ? 1 : 0;
}
/**
* Builds the display for the checkbox allowing the user to allow matching logins by email
* Displays in Settings > General
*
* @since 2.9
**/
public function render_match_by_email() {
?>
<label>
<input
type="checkbox"
name="jetpack_sso_match_by_email"
<?php checked( Jetpack_SSO_Helpers::match_by_email() ); ?>
<?php disabled( Jetpack_SSO_Helpers::is_match_by_email_checkbox_disabled() ); ?>
>
<?php esc_html_e( 'Match by Email', 'jetpack' ); ?>
</label>
<?php
}
/**
* Validate the match by email check in Settings > General.
*
* @param bool $input The jetpack_sso_match_by_email option setting.
*
* @since 2.9
* @return boolean
**/
public function validate_jetpack_sso_match_by_email( $input ) {
return ( ! empty( $input ) ) ? 1 : 0;
}
/**
* Checks to determine if the user wants to login on wp-login
*
* This function mostly exists to cover the exceptions to login
* that may exist as other parameters to $_GET[action] as $_GET[action]
* does not have to exist. By default WordPress assumes login if an action
* is not set, however this may not be true, as in the case of logout
* where $_GET[loggedout] is instead set
*
* @return boolean
**/
private function wants_to_login() {
$wants_to_login = false;
// Cover default WordPress behavior.
$action = isset( $_REQUEST['action'] ) ? filter_var( wp_unslash( $_REQUEST['action'] ) ) : 'login'; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
// And now the exceptions.
$action = isset( $_GET['loggedout'] ) ? 'loggedout' : $action; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
if ( Jetpack_SSO_Helpers::display_sso_form_for_action( $action ) ) {
$wants_to_login = true;
}
return $wants_to_login;
}
/**
* Checks to determine if the user has indicated they want to use the wp-admin interface.
*/
private function use_wp_admin_interface() {
return 'wp-admin' === get_option( 'wpcom_admin_interface' );
}
/**
* Initialization for a SSO request.
*/
public function login_init() {
global $action;
$tracking = new Tracking();
if ( Jetpack_SSO_Helpers::should_hide_login_form() ) {
/**
* Since the default authenticate filters fire at priority 20 for checking username and password,
* let's fire at priority 30. wp_authenticate_spam_check is fired at priority 99, but since we return a
* WP_Error in disable_default_login_form, then we won't trigger spam processing logic.
*/
add_filter( 'authenticate', array( 'Jetpack_SSO_Notices', 'disable_default_login_form' ), 30 );
/**
* Filter the display of the disclaimer message appearing when default WordPress login form is disabled.
*
* @module sso
*
* @since 2.8.0
*
* @param bool true Should the disclaimer be displayed. Default to true.
*/
$display_sso_disclaimer = apply_filters( 'jetpack_sso_display_disclaimer', true );
if ( $display_sso_disclaimer ) {
add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'msg_login_by_jetpack' ) );
}
}
if ( 'jetpack-sso' === $action ) {
if ( isset( $_GET['result'] ) && isset( $_GET['user_id'] ) && isset( $_GET['sso_nonce'] ) && 'success' === $_GET['result'] ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
$this->handle_login();
$this->display_sso_login_form();
} elseif ( ( new Status() )->is_staging_site() ) {
add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'sso_not_allowed_in_staging' ) );
} else {
// Is it wiser to just use wp_redirect than do this runaround to wp_safe_redirect?
add_filter( 'allowed_redirect_hosts', array( 'Jetpack_SSO_Helpers', 'allowed_redirect_hosts' ) );
$reauth = ! empty( $_GET['force_reauth'] ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
$sso_url = $this->get_sso_url_or_die( $reauth );
$tracking->record_user_event( 'sso_login_redirect_success' );
wp_safe_redirect( $sso_url );
exit;
}
} elseif ( Jetpack_SSO_Helpers::display_sso_form_for_action( $action ) ) {
// Save cookies so we can handle redirects after SSO.
static::save_cookies();
/**
* Check to see if the site admin wants to automagically forward the user
* to the WordPress.com login page AND that the request to wp-login.php
* is not something other than login (Like logout!)
*/
if ( ! $this->use_wp_admin_interface() && Jetpack_SSO_Helpers::bypass_login_forward_wpcom() && $this->wants_to_login() ) {
add_filter( 'allowed_redirect_hosts', array( 'Jetpack_SSO_Helpers', 'allowed_redirect_hosts' ) );
$reauth = ! empty( $_GET['force_reauth'] ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
$sso_url = $this->get_sso_url_or_die( $reauth );
$tracking->record_user_event( 'sso_login_redirect_bypass_success' );
wp_safe_redirect( $sso_url );
exit;
}
$this->display_sso_login_form();
}
}
/**
* Ensures that we can get a nonce from WordPress.com via XML-RPC before setting
* up the hooks required to display the SSO form.
*/
public function display_sso_login_form() {
add_filter( 'login_body_class', array( $this, 'login_body_class' ) );
add_action( 'login_head', array( $this, 'print_inline_admin_css' ) );
if ( ( new Status() )->is_staging_site() ) {
add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'sso_not_allowed_in_staging' ) );
return;
}
$sso_nonce = self::request_initial_nonce();
if ( is_wp_error( $sso_nonce ) ) {
return;
}
add_action( 'login_form', array( $this, 'login_form' ) );
add_action( 'login_enqueue_scripts', array( $this, 'login_enqueue_scripts' ) );
}
/**
* Conditionally save the redirect_to url as a cookie.
*
* @since 4.6.0 Renamed to save_cookies from maybe_save_redirect_cookies
*/
public static function save_cookies() {
if ( headers_sent() ) {
return new WP_Error( 'headers_sent', __( 'Cannot deal with cookie redirects, as headers are already sent.', 'jetpack' ) );
}
setcookie(
'jetpack_sso_original_request',
// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Sniff misses the wrapping esc_url_raw().
esc_url_raw( set_url_scheme( ( isset( $_SERVER['HTTP_HOST'] ) ? wp_unslash( $_SERVER['HTTP_HOST'] ) : '' ) . ( isset( $_SERVER['REQUEST_URI'] ) ? wp_unslash( $_SERVER['REQUEST_URI'] ) : '' ) ) ),
time() + HOUR_IN_SECONDS,
COOKIEPATH,
COOKIE_DOMAIN,
is_ssl(),
true
);
if ( ! empty( $_GET['redirect_to'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
// If we have something to redirect to.
$url = esc_url_raw( wp_unslash( $_GET['redirect_to'] ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
setcookie( 'jetpack_sso_redirect_to', $url, time() + HOUR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN, is_ssl(), true );
} elseif ( ! empty( $_COOKIE['jetpack_sso_redirect_to'] ) ) {
// Otherwise, if it's already set, purge it.
setcookie( 'jetpack_sso_redirect_to', ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN, is_ssl(), true );
}
}
/**
* Outputs the Jetpack SSO button and description as well as the toggle link
* for switching between Jetpack SSO and default login.
*/
public function login_form() {
$site_name = get_bloginfo( 'name' );
if ( ! $site_name ) {
$site_name = get_bloginfo( 'url' );
}
$display_name = ! empty( $_COOKIE[ 'jetpack_sso_wpcom_name_' . COOKIEHASH ] )
? sanitize_text_field( wp_unslash( $_COOKIE[ 'jetpack_sso_wpcom_name_' . COOKIEHASH ] ) )
: false;
$gravatar = ! empty( $_COOKIE[ 'jetpack_sso_wpcom_gravatar_' . COOKIEHASH ] )
? esc_url_raw( wp_unslash( $_COOKIE[ 'jetpack_sso_wpcom_gravatar_' . COOKIEHASH ] ) )
: false;
?>
<div id="jetpack-sso-wrap">
<?php
/**
* Allow extension above Jetpack's SSO form.
*
* @module sso
*
* @since 8.6.0
*/
do_action( 'jetpack_sso_login_form_above_wpcom' );
if ( $display_name && $gravatar ) :
?>
<div id="jetpack-sso-wrap__user">
<img width="72" height="72" src="<?php echo esc_html( $gravatar ); ?>" />
<h2>
<?php
echo wp_kses(
/* translators: %s a user display name. */
sprintf( __( 'Log in as <span>%s</span>', 'jetpack' ), esc_html( $display_name ) ),
array( 'span' => true )
);
?>
</h2>
</div>
<?php endif; ?>
<div id="jetpack-sso-wrap__action">
<?php echo $this->build_sso_button( array(), 'is_primary' ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Escaping done in build_sso_button() ?>
<?php if ( $display_name && $gravatar ) : ?>
<a rel="nofollow" class="jetpack-sso-wrap__reauth" href="<?php echo esc_url( $this->build_sso_button_url( array( 'force_reauth' => '1' ) ) ); ?>">
<?php esc_html_e( 'Log in as a different WordPress.com user', 'jetpack' ); ?>
</a>
<?php else : ?>
<p>
<?php
/**
* Filter the messeage displayed below the SSO button.
*
* @module sso
*
* @since 10.3.0
*
* @param string $sso_explanation Message displayed below the SSO button.
*/
$sso_explanation = apply_filters(
'jetpack_sso_login_form_explanation_text',
sprintf(
/* Translators: %s is the name of the site. */
__( 'You can now save time spent logging in by connecting your WordPress.com account to %s.', 'jetpack' ),
esc_html( $site_name )
)
);
echo esc_html( $sso_explanation );
?>
</p>
<?php endif; ?>
</div>
<?php
/**
* Allow extension below Jetpack's SSO form.
*
* @module sso
*
* @since 8.6.0
*/
do_action( 'jetpack_sso_login_form_below_wpcom' );
if ( ! Jetpack_SSO_Helpers::should_hide_login_form() ) :
?>
<div class="jetpack-sso-or">
<span><?php esc_html_e( 'Or', 'jetpack' ); ?></span>
</div>
<a href="<?php echo esc_url( add_query_arg( 'jetpack-sso-show-default-form', '1' ) ); ?>" class="jetpack-sso-toggle wpcom">
<?php
esc_html_e( 'Log in with username and password', 'jetpack' )
?>
</a>
<a href="<?php echo esc_url( add_query_arg( 'jetpack-sso-show-default-form', '0' ) ); ?>" class="jetpack-sso-toggle default">
<?php
esc_html_e( 'Log in with WordPress.com', 'jetpack' )
?>
</a>
<?php endif; ?>
</div>
<?php
}
/**
* Clear the cookies that store the profile information for the last
* WPCOM user to connect.
*/
public static function clear_wpcom_profile_cookies() {
if ( isset( $_COOKIE[ 'jetpack_sso_wpcom_name_' . COOKIEHASH ] ) ) {
setcookie(
'jetpack_sso_wpcom_name_' . COOKIEHASH,
' ',
time() - YEAR_IN_SECONDS,
COOKIEPATH,
COOKIE_DOMAIN,
is_ssl(),
true
);
}
if ( isset( $_COOKIE[ 'jetpack_sso_wpcom_gravatar_' . COOKIEHASH ] ) ) {
setcookie(
'jetpack_sso_wpcom_gravatar_' . COOKIEHASH,
' ',
time() - YEAR_IN_SECONDS,
COOKIEPATH,
COOKIE_DOMAIN,
is_ssl(),
true
);
}
}
/**
* Clear cookies that are no longer needed once the user has logged in.
*
* @since 4.8.0
*/
public static function clear_cookies_after_login() {
self::clear_wpcom_profile_cookies();
if ( isset( $_COOKIE['jetpack_sso_nonce'] ) ) {
setcookie(
'jetpack_sso_nonce',
' ',
time() - YEAR_IN_SECONDS,
COOKIEPATH,
COOKIE_DOMAIN,
is_ssl(),
true
);
}
if ( isset( $_COOKIE['jetpack_sso_original_request'] ) ) {
setcookie(
'jetpack_sso_original_request',
' ',
time() - YEAR_IN_SECONDS,
COOKIEPATH,
COOKIE_DOMAIN,
is_ssl(),
true
);
}
if ( isset( $_COOKIE['jetpack_sso_redirect_to'] ) ) {
setcookie(
'jetpack_sso_redirect_to',
' ',
time() - YEAR_IN_SECONDS,
COOKIEPATH,
COOKIE_DOMAIN,
is_ssl(),
true
);
}
}
/**
* Clean up after Jetpack gets disconnected.
*
* @since 10.7
*/
public static function disconnect() {
if ( Jetpack::connection()->is_user_connected() ) {
static::delete_connection_for_user( get_current_user_id() );
}
}
/**
* Remove an SSO connection for a user.
*
* @param int $user_id The local user id.
*/
public static function delete_connection_for_user( $user_id ) {
$wpcom_user_id = get_user_meta( $user_id, 'wpcom_user_id', true );
if ( ! $wpcom_user_id ) {
return;
}
$xml = new Jetpack_IXR_Client(
array(
'wpcom_user_id' => $user_id,
)
);
$xml->query( 'jetpack.sso.removeUser', $wpcom_user_id );
if ( $xml->isError() ) {
return false;
}
// Clean up local data stored for SSO.
delete_user_meta( $user_id, 'wpcom_user_id' );
delete_user_meta( $user_id, 'wpcom_user_data' );
self::clear_wpcom_profile_cookies();
return $xml->getResponse();
}
/**
* Retrieves nonce used for SSO form.
*/
public static function request_initial_nonce() {
$nonce = ! empty( $_COOKIE['jetpack_sso_nonce'] )
? sanitize_key( wp_unslash( $_COOKIE['jetpack_sso_nonce'] ) )
: false;
if ( ! $nonce ) {
$xml = new Jetpack_IXR_Client();
$xml->query( 'jetpack.sso.requestNonce' );
if ( $xml->isError() ) {
return new WP_Error( $xml->getErrorCode(), $xml->getErrorMessage() );
}
$nonce = sanitize_key( $xml->getResponse() );
setcookie(
'jetpack_sso_nonce',
$nonce,
time() + ( 10 * MINUTE_IN_SECONDS ),
COOKIEPATH,
COOKIE_DOMAIN,
is_ssl(),
true
);
}
return $nonce;
}
/**
* The function that actually handles the login!
*/
public function handle_login() {
$wpcom_nonce = isset( $_GET['sso_nonce'] ) ? sanitize_key( $_GET['sso_nonce'] ) : ''; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
$wpcom_user_id = isset( $_GET['user_id'] ) ? (int) $_GET['user_id'] : 0; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
$xml = new Jetpack_IXR_Client();
$xml->query( 'jetpack.sso.validateResult', $wpcom_nonce, $wpcom_user_id );
$user_data = $xml->isError() ? false : $xml->getResponse();
if ( empty( $user_data ) ) {
add_filter( 'jetpack_sso_default_to_sso_login', '__return_false' );
add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'error_invalid_response_data' ) );
return;
}
$user_data = (object) $user_data;
$user = null;
/**
* Fires before Jetpack's SSO modifies the log in form.
*
* @module sso
*
* @since 2.6.0
*
* @param object $user_data WordPress.com User information.
*/
do_action( 'jetpack_sso_pre_handle_login', $user_data );
$tracking = new Tracking();
if ( Jetpack_SSO_Helpers::is_two_step_required() && 0 === (int) $user_data->two_step_enabled ) {
$this->user_data = $user_data;
$tracking->record_user_event(
'sso_login_failed',
array(
'error_message' => 'error_msg_enable_two_step',
)
);
$error = new WP_Error( 'two_step_required', __( 'You must have Two-Step Authentication enabled on your WordPress.com account.', 'jetpack' ) );
/** This filter is documented in core/src/wp-includes/pluggable.php */
do_action( 'wp_login_failed', $user_data->login, $error );
add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'error_msg_enable_two_step' ) );
return;
}
$user_found_with = '';
if ( empty( $user ) && isset( $user_data->external_user_id ) ) {
$user_found_with = 'external_user_id';
$user = get_user_by( 'id', (int) $user_data->external_user_id );
if ( $user ) {
$expected_id = get_user_meta( $user->ID, 'wpcom_user_id', true );
if ( $expected_id && $expected_id != $user_data->ID ) { // phpcs:ignore WordPress.PHP.StrictComparisons.LooseComparison, Universal.Operators.StrictComparisons.LooseNotEqual
$error = new WP_Error( 'expected_wpcom_user', __( 'Something got a little mixed up and an unexpected WordPress.com user logged in.', 'jetpack' ) );
$tracking->record_user_event(
'sso_login_failed',
array(
'error_message' => 'error_unexpected_wpcom_user',
)
);
/** This filter is documented in core/src/wp-includes/pluggable.php */
do_action( 'wp_login_failed', $user_data->login, $error );
add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'error_invalid_response_data' ) ); // @todo Need to have a better notice. This is only for the sake of testing the validation.
return;
}
update_user_meta( $user->ID, 'wpcom_user_id', $user_data->ID );
}
}
// If we don't have one by wpcom_user_id, try by the email?
if ( empty( $user ) && Jetpack_SSO_Helpers::match_by_email() ) {
$user_found_with = 'match_by_email';
$user = get_user_by( 'email', $user_data->email );
if ( $user ) {
update_user_meta( $user->ID, 'wpcom_user_id', $user_data->ID );
}
}
// If we've still got nothing, create the user.
$new_user_override_role = Jetpack_SSO_Helpers::new_user_override( $user_data );
if ( empty( $user ) && ( get_option( 'users_can_register' ) || $new_user_override_role ) ) {
/**
* If not matching by email we still need to verify the email does not exist
* or this blows up
*
* If match_by_email is true, we know the email doesn't exist, as it would have
* been found in the first pass. If get_user_by( 'email' ) doesn't find the
* user, then we know that email is unused, so it's safe to add.
*/
if ( Jetpack_SSO_Helpers::match_by_email() || ! get_user_by( 'email', $user_data->email ) ) {
if ( $new_user_override_role ) {
$user_data->role = $new_user_override_role;
}
$user = Jetpack_SSO_Helpers::generate_user( $user_data );
if ( ! $user ) {
$tracking->record_user_event(
'sso_login_failed',
array(
'error_message' => 'could_not_create_username',
)
);
add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'error_unable_to_create_user' ) );
return;
}
$user_found_with = $new_user_override_role
? 'user_created_new_user_override'
: 'user_created_users_can_register';
} else {
$tracking->record_user_event(
'sso_login_failed',
array(
'error_message' => 'error_msg_email_already_exists',
)
);
$this->user_data = $user_data;
add_action( 'login_message', array( 'Jetpack_SSO_Notices', 'error_msg_email_already_exists' ) );
return;
}
}
/**
* Fires after we got login information from WordPress.com.
*
* @module sso
*
* @since 2.6.0
*
* @param WP_User|false|null $user Local User information.
* @param object $user_data WordPress.com User Login information.
*/
do_action( 'jetpack_sso_handle_login', $user, $user_data );
if ( $user ) {
// Cache the user's details, so we can present it back to them on their user screen.
update_user_meta( $user->ID, 'wpcom_user_data', $user_data );
add_filter( 'auth_cookie_expiration', array( 'Jetpack_SSO_Helpers', 'extend_auth_cookie_expiration_for_sso' ) );
wp_set_auth_cookie( $user->ID, true );
remove_filter( 'auth_cookie_expiration', array( 'Jetpack_SSO_Helpers', 'extend_auth_cookie_expiration_for_sso' ) );
/** This filter is documented in core/src/wp-includes/user.php */
do_action( 'wp_login', $user->user_login, $user );
wp_set_current_user( $user->ID );
$_request_redirect_to = isset( $_REQUEST['redirect_to'] ) ? esc_url_raw( wp_unslash( $_REQUEST['redirect_to'] ) ) : ''; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
$redirect_to = user_can( $user, 'edit_posts' ) ? admin_url() : self::profile_page_url();
// If we have a saved redirect to request in a cookie.
if ( ! empty( $_COOKIE['jetpack_sso_redirect_to'] ) ) {
// Set that as the requested redirect to.
$redirect_to = esc_url_raw( wp_unslash( $_COOKIE['jetpack_sso_redirect_to'] ) );
$_request_redirect_to = $redirect_to;
}
$json_api_auth_environment = Jetpack_SSO_Helpers::get_json_api_auth_environment();
$is_json_api_auth = ! empty( $json_api_auth_environment );
$is_user_connected = ( new Connection_Manager( 'jetpack' ) )->is_user_connected( $user->ID );
$roles = new Roles();
$tracking->record_user_event(
'sso_user_logged_in',
array(
'user_found_with' => $user_found_with,
'user_connected' => (bool) $is_user_connected,
'user_role' => $roles->translate_current_user_to_role(),
'is_json_api_auth' => (bool) $is_json_api_auth,
)
);
if ( $is_json_api_auth ) {
Jetpack::init()->verify_json_api_authorization_request( $json_api_auth_environment );
Jetpack::init()->store_json_api_authorization_token( $user->user_login, $user );
} elseif ( ! $is_user_connected ) {
wp_safe_redirect(
add_query_arg(
array(
'redirect_to' => $redirect_to,
'request_redirect_to' => $_request_redirect_to,
'calypso_env' => ( new Host() )->get_calypso_env(),
'jetpack-sso-auth-redirect' => '1',
),
admin_url()
)
);
exit;
}
add_filter( 'allowed_redirect_hosts', array( 'Jetpack_SSO_Helpers', 'allowed_redirect_hosts' ) );
wp_safe_redirect(
/** This filter is documented in core/src/wp-login.php */
apply_filters( 'login_redirect', $redirect_to, $_request_redirect_to, $user )
);
exit;
}
add_filter( 'jetpack_sso_default_to_sso_login', '__return_false' );
$tracking->record_user_event(
'sso_login_failed',
array(
'error_message' => 'cant_find_user',
)
);
$this->user_data = $user_data;
$error = new WP_Error( 'account_not_found', __( 'Account not found. If you already have an account, make sure you have connected to WordPress.com.', 'jetpack' ) );
/** This filter is documented in core/src/wp-includes/pluggable.php */
do_action( 'wp_login_failed', $user_data->login, $error );
add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'cant_find_user' ) );
}
/**
* Retreive the admin profile page URL.
*/
public static function profile_page_url() {
return admin_url( 'profile.php' );
}
/**
* Builds the "Login to WordPress.com" button that is displayed on the login page as well as user profile page.
*
* @param array $args An array of arguments to add to the SSO URL.
* @param boolean $is_primary If the button have the `button-primary` class.
* @return string Returns the HTML markup for the button.
*/
public function build_sso_button( $args = array(), $is_primary = false ) {
$url = $this->build_sso_button_url( $args );
$classes = $is_primary
? 'jetpack-sso button button-primary'
: 'jetpack-sso button';
return sprintf(
'<a rel="nofollow" href="%1$s" class="%2$s">%3$s %4$s</a>',
esc_url( $url ),
$classes,
'<span class="genericon genericon-wordpress"></span>',
esc_html__( 'Log in with WordPress.com', 'jetpack' )
);
}
/**
* Builds a URL with `jetpack-sso` action and option args which is used to setup SSO.
*
* @param array $args An array of arguments to add to the SSO URL.
* @return string The URL used for SSO.
*/
public function build_sso_button_url( $args = array() ) {
$defaults = array(
'action' => 'jetpack-sso',
);
$args = wp_parse_args( $args, $defaults );
if ( ! empty( $_GET['redirect_to'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
$args['redirect_to'] = rawurlencode( esc_url_raw( wp_unslash( $_GET['redirect_to'] ) ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
}
return add_query_arg( $args, wp_login_url() );
}
/**
* Retrieves a WordPress.com SSO URL with appropriate query parameters or dies.
*
* @param boolean $reauth If the user be forced to reauthenticate on WordPress.com.
* @param array $args Optional query parameters.
* @return string The WordPress.com SSO URL.
*/
public function get_sso_url_or_die( $reauth = false, $args = array() ) {
$custom_login_url = Jetpack_SSO_Helpers::get_custom_login_url();
if ( $custom_login_url ) {
$args['login_url'] = rawurlencode( $custom_login_url );
}
if ( empty( $reauth ) ) {
$sso_redirect = $this->build_sso_url( $args );
} else {
self::clear_wpcom_profile_cookies();
$sso_redirect = $this->build_reauth_and_sso_url( $args );
}
// If there was an error retrieving the SSO URL, then error.
if ( is_wp_error( $sso_redirect ) ) {
$error_message = sanitize_text_field(
sprintf( '%s: %s', $sso_redirect->get_error_code(), $sso_redirect->get_error_message() )
);
$tracking = new Tracking();
$tracking->record_user_event(
'sso_login_redirect_failed',
array(
'error_message' => $error_message,
)
);
wp_die( esc_html( $error_message ) );
}
return $sso_redirect;
}
/**
* Build WordPress.com SSO URL with appropriate query parameters.
*
* @param array $args Optional query parameters.
* @return string WordPress.com SSO URL
*/
public function build_sso_url( $args = array() ) {
$sso_nonce = ! empty( $args['sso_nonce'] ) ? $args['sso_nonce'] : self::request_initial_nonce();
$defaults = array(
'action' => 'jetpack-sso',
'site_id' => Jetpack_Options::get_option( 'id' ),
'sso_nonce' => $sso_nonce,
'calypso_auth' => '1',
);
$args = wp_parse_args( $args, $defaults );
if ( is_wp_error( $args['sso_nonce'] ) ) {
return $args['sso_nonce'];
}
return add_query_arg( $args, 'https://wordpress.com/wp-login.php' );
}
/**
* Build WordPress.com SSO URL with appropriate query parameters,
* including the parameters necessary to force the user to reauthenticate
* on WordPress.com.
*
* @param array $args Optional query parameters.
* @return string WordPress.com SSO URL
*/
public function build_reauth_and_sso_url( $args = array() ) {
$sso_nonce = ! empty( $args['sso_nonce'] ) ? $args['sso_nonce'] : self::request_initial_nonce();
$redirect = $this->build_sso_url(
array(
'force_auth' => '1',
'sso_nonce' => $sso_nonce,
)
);
if ( is_wp_error( $redirect ) ) {
return $redirect;
}
$defaults = array(
'action' => 'jetpack-sso',
'site_id' => Jetpack_Options::get_option( 'id' ),
'sso_nonce' => $sso_nonce,
'reauth' => '1',
'redirect_to' => rawurlencode( $redirect ),
'calypso_auth' => '1',
);
$args = wp_parse_args( $args, $defaults );
if ( is_wp_error( $args['sso_nonce'] ) ) {
return $args['sso_nonce'];
}
return add_query_arg( $args, 'https://wordpress.com/wp-login.php' );
}
/**
* Determines local user associated with a given WordPress.com user ID.
*
* @since 2.6.0
*
* @param int $wpcom_user_id User ID from WordPress.com.
* @return object Local user object if found, null if not.
*/
public static function get_user_by_wpcom_id( $wpcom_user_id ) {
$user_query = new WP_User_Query(
array(
'meta_key' => 'wpcom_user_id',
'meta_value' => (int) $wpcom_user_id,
'number' => 1,
)
);
$users = $user_query->get_results();
return $users ? array_shift( $users ) : null;
}
/**
* When jetpack-sso-auth-redirect query parameter is set, will redirect user to
* WordPress.com authorization flow.
*
* We redirect here instead of in handle_login() because Jetpack::init()->build_connect_url
* calls menu_page_url() which doesn't work properly until admin menus are registered.
*/
public function maybe_authorize_user_after_sso() {
if ( empty( $_GET['jetpack-sso-auth-redirect'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
return;
}
$redirect_to = ! empty( $_GET['redirect_to'] ) ? esc_url_raw( wp_unslash( $_GET['redirect_to'] ) ) : admin_url(); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
$request_redirect_to = ! empty( $_GET['request_redirect_to'] ) ? esc_url_raw( wp_unslash( $_GET['request_redirect_to'] ) ) : $redirect_to; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
/** This filter is documented in core/src/wp-login.php */
$redirect_after_auth = apply_filters( 'login_redirect', $redirect_to, $request_redirect_to, wp_get_current_user() );
/**
* Since we are passing this redirect to WordPress.com and therefore can not use wp_safe_redirect(),
* let's sanitize it here to make sure it's safe. If the redirect is not safe, then use admin_url().
*/
$redirect_after_auth = wp_sanitize_redirect( $redirect_after_auth );
$redirect_after_auth = wp_validate_redirect( $redirect_after_auth, admin_url() );
/**
* Return the raw connect URL with our redirect and attribute connection to SSO.
* We remove any other filters that may be turning on the in-place connection
* since we will be redirecting the user as opposed to iFraming.
*/
remove_all_filters( 'jetpack_use_iframe_authorization_flow' );
add_filter( 'jetpack_use_iframe_authorization_flow', '__return_false' );
$connect_url = Jetpack::init()->build_connect_url( true, $redirect_after_auth, 'sso' );
add_filter( 'allowed_redirect_hosts', array( 'Jetpack_SSO_Helpers', 'allowed_redirect_hosts' ) );
wp_safe_redirect( $connect_url );
exit;
}
/**
* Cache user's display name and Gravatar so it can be displayed on the login screen. These cookies are
* stored when the user logs out, and then deleted when the user logs in.
*/
public function store_wpcom_profile_cookies_on_logout() {
if ( ! ( new Connection_Manager( 'jetpack' ) )->is_user_connected( get_current_user_id() ) ) {
return;
}
$user_data = $this->get_user_data( get_current_user_id() );
if ( ! $user_data ) {
return;
}
setcookie(
'jetpack_sso_wpcom_name_' . COOKIEHASH,
$user_data->display_name,
time() + WEEK_IN_SECONDS,
COOKIEPATH,
COOKIE_DOMAIN,
is_ssl(),
true
);
setcookie(
'jetpack_sso_wpcom_gravatar_' . COOKIEHASH,
get_avatar_url(
$user_data->email,
array(
'size' => 144,
'default' => 'mystery',
)
),
time() + WEEK_IN_SECONDS,
COOKIEPATH,
COOKIE_DOMAIN,
is_ssl(),
true
);
}
/**
* Determines if a local user is connected to WordPress.com
*
* @since 2.8
* @param integer $user_id - Local user id.
* @return boolean
**/
public function is_user_connected( $user_id ) {
return $this->get_user_data( $user_id );
}
/**
* Retrieves a user's WordPress.com data
*
* @since 2.8
* @param integer $user_id - Local user id.
* @return mixed null or stdClass
**/
public function get_user_data( $user_id ) {
return get_user_meta( $user_id, 'wpcom_user_data', true );
}
}
Jetpack_SSO::get_instance();