jetpack / modules / sso.php

sso.php in Jetpack – WP Security, Backup, Speed, & Growth 4.4.5, at modules/sso.php

1,017 lines 31.6 KB

Raw Download Zip

1	<?php
2	require_once( JETPACK__PLUGIN_DIR . 'modules/sso/class.jetpack-sso-helpers.php' );
3	require_once( JETPACK__PLUGIN_DIR . 'modules/sso/class.jetpack-sso-notices.php' );
4
5	/**
6	* Module Name: Single Sign On
7	* Module Description: Secure user authentication with WordPress.com.
8	* Jumpstart Description: Lets you log in to all your Jetpack-enabled sites with one click using your WordPress.com account.
9	* Sort Order: 30
10	* Recommendation Order: 5
11	* First Introduced: 2.6
12	* Requires Connection: Yes
13	* Auto Activate: No
14	* Module Tags: Developers
15	* Feature: Security, Jumpstart
16	* Additional Search Queries: sso, single sign on, login, log in
17	*/
18
19	class Jetpack_SSO {
20	static $instance = null;
21
22	private function __construct() {
23
24	self::$instance = $this;
25
26	add_action( 'admin_init', array( $this, 'maybe_authorize_user_after_sso' ), 1 );
27	add_action( 'admin_init', array( $this, 'register_settings' ) );
28	add_action( 'login_init', array( $this, 'login_init' ) );
29	add_action( 'delete_user', array( $this, 'delete_connection_for_user' ) );
30	add_filter( 'jetpack_xmlrpc_methods', array( $this, 'xmlrpc_methods' ) );
31	add_action( 'init', array( $this, 'maybe_logout_user' ), 5 );
32	add_action( 'jetpack_modules_loaded', array( $this, 'module_configure_button' ) );
33	add_action( 'login_form_logout', array( $this, 'store_wpcom_profile_cookies_on_logout' ) );
34	add_action( 'wp_login', array( 'Jetpack_SSO', 'clear_wpcom_profile_cookies' ) );
35	add_action( 'jetpack_unlinked_user', array( $this, 'delete_connection_for_user') );
36
37	// Adding this action so that on login_init, the action won't be sanitized out of the $action global.
38	add_action( 'login_form_jetpack-sso', '__return_true' );
39	}
40
41	/**
42	* Returns the single instance of the Jetpack_SSO object
43	*
44	* @since 2.8
45	* @return Jetpack_SSO
46	**/
47	public static function get_instance() {
48	if ( ! is_null( self::$instance ) ) {
49	return self::$instance;
50	}
51
52	return self::$instance = new Jetpack_SSO;
53	}
54
55	/**
56	* Add configure button and functionality to the module card on the Jetpack screen
57	**/
58	public static function module_configure_button() {
59	Jetpack::enable_module_configurable( __FILE__ );
60	Jetpack::module_configuration_load( __FILE__, array( __CLASS__, 'module_configuration_load' ) );
61	Jetpack::module_configuration_head( __FILE__, array( __CLASS__, 'module_configuration_head' ) );
62	Jetpack::module_configuration_screen( __FILE__, array( __CLASS__, 'module_configuration_screen' ) );
63	}
64
65	public static function module_configuration_load() {}
66
67	public static function module_configuration_head() {}
68
69	public static function module_configuration_screen() {
70	?>
71	<form method="post" action="options.php">
72	<?php settings_fields( 'jetpack-sso' ); ?>
73	<?php do_settings_sections( 'jetpack-sso' ); ?>
74	<?php submit_button(); ?>
75	</form>
76	<?php
77	}
78
79	/**
80	* If jetpack_force_logout == 1 in current user meta the user will be forced
81	* to logout and reauthenticate with the site.
82	**/
83	public function maybe_logout_user() {
84	global $current_user;
85
86	if ( 1 == $current_user->jetpack_force_logout ) {
87	delete_user_meta( $current_user->ID, 'jetpack_force_logout' );
88	self::delete_connection_for_user( $current_user->ID );
89	wp_logout();
90	wp_safe_redirect( wp_login_url() );
91	exit;
92	}
93	}
94
95	/**
96	* Adds additional methods the WordPress xmlrpc API for handling SSO specific features
97	*
98	* @param array $methods
99	* @return array
100	**/
101	public function xmlrpc_methods( $methods ) {
102	$methods['jetpack.userDisconnect'] = array( $this, 'xmlrpc_user_disconnect' );
103	return $methods;
104	}
105
106	/**
107	* Marks a user's profile for disconnect from WordPress.com and forces a logout
108	* the next time the user visits the site.
109	**/
110	public function xmlrpc_user_disconnect( $user_id ) {
111	$user_query = new WP_User_Query(
112	array(
113	'meta_key' => 'wpcom_user_id',
114	'meta_value' => $user_id,
115	)
116	);
117	$user = $user_query->get_results();
118	$user = $user[0];
119
120	if ( $user instanceof WP_User ) {
121	$user = wp_set_current_user( $user->ID );
122	update_user_meta( $user->ID, 'jetpack_force_logout', '1' );
123	self::delete_connection_for_user( $user->ID );
124	return true;
125	}
126	return false;
127	}
128
129	/**
130	* Enqueues scripts and styles necessary for SSO login.
131	*/
132	public function login_enqueue_scripts() {
133	global $action;
134
135	if ( ! in_array( $action, array( 'jetpack-sso', 'login' ) ) ) {
136	return;
137	}
138
139	if ( is_rtl() ) {
140	wp_enqueue_style( 'jetpack-sso-login', plugins_url( 'modules/sso/jetpack-sso-login-rtl.css', JETPACK__PLUGIN_FILE ), array( 'login', 'genericons' ), JETPACK__VERSION );
141	} else {
142	wp_enqueue_style( 'jetpack-sso-login', plugins_url( 'modules/sso/jetpack-sso-login.css', JETPACK__PLUGIN_FILE ), array( 'login', 'genericons' ), JETPACK__VERSION );
143	}
144
145	wp_enqueue_script( 'jetpack-sso-login', plugins_url( 'modules/sso/jetpack-sso-login.js', JETPACK__PLUGIN_FILE ), array( 'jquery' ), JETPACK__VERSION );
146	}
147
148	/**
149	* Adds Jetpack SSO classes to login body
150	*
151	* @param array $classes Array of classes to add to body tag
152	* @return array Array of classes to add to body tag
153	*/
154	public function login_body_class( $classes ) {
155	global $action;
156
157	if ( ! in_array( $action, array( 'jetpack-sso', 'login' ) ) ) {
158	return $classes;
159	}
160
161	// Always add the jetpack-sso class so that we can add SSO specific styling even when the SSO form isn't being displayed.
162	$classes[] = 'jetpack-sso';
163
164	if ( ! Jetpack::is_staging_site() ) {
165	/**
166	* Should we show the SSO login form?
167	*
168	* $_GET['jetpack-sso-default-form'] is used to provide a fallback in case JavaScript is not enabled.
169	*
170	* The default_to_sso_login() method allows us to dynamically decide whether we show the SSO login form or not.
171	* The SSO module uses the method to display the default login form if we can not find a user to log in via SSO.
172	* But, the method could be filtered by a site admin to always show the default login form if that is preferred.
173	*/
174	if ( empty( $_GET['jetpack-sso-show-default-form'] ) && Jetpack_SSO_Helpers::show_sso_login() ) {
175	$classes[] = 'jetpack-sso-form-display';
176	}
177	}
178
179	return $classes;
180	}
181
182	public function print_inline_admin_css() {
183	?>
184	<style>
185	.jetpack-sso .message {
186	margin-top: 20px;
187	}
188
189	.jetpack-sso #login .message:first-child,
190	.jetpack-sso #login h1 + .message {
191	margin-top: 0;
192	}
193	</style>
194	<?php
195	}
196
197	/**
198	* Adds settings fields to Settings > General > Single Sign On that allows users to
199	* turn off the login form on wp-login.php
200	*
201	* @since 2.7
202	**/
203	public function register_settings() {
204
205	add_settings_section(
206	'jetpack_sso_settings',
207	__( 'Single Sign On' , 'jetpack' ),
208	'__return_false',
209	'jetpack-sso'
210	);
211
212	/*
213	* Settings > General > Single Sign On
214	* Require two step authentication
215	*/
216	register_setting(
217	'jetpack-sso',
218	'jetpack_sso_require_two_step',
219	array( $this, 'validate_jetpack_sso_require_two_step' )
220	);
221
222	add_settings_field(
223	'jetpack_sso_require_two_step',
224	'', // __( 'Require Two-Step Authentication' , 'jetpack' ),
225	array( $this, 'render_require_two_step' ),
226	'jetpack-sso',
227	'jetpack_sso_settings'
228	);
229
230	/*
231	* Settings > General > Single Sign On
232	*/
233	register_setting(
234	'jetpack-sso',
235	'jetpack_sso_match_by_email',
236	array( $this, 'validate_jetpack_sso_match_by_email' )
237	);
238
239	add_settings_field(
240	'jetpack_sso_match_by_email',
241	'', // __( 'Match by Email' , 'jetpack' ),
242	array( $this, 'render_match_by_email' ),
243	'jetpack-sso',
244	'jetpack_sso_settings'
245	);
246	}
247
248	/**
249	* Builds the display for the checkbox allowing user to require two step
250	* auth be enabled on WordPress.com accounts before login. Displays in Settings > General
251	*
252	* @since 2.7
253	**/
254	public function render_require_two_step() {
255	?>
256	<label>
257	<input
258	type="checkbox"
259	name="jetpack_sso_require_two_step"
260	<?php checked( Jetpack_SSO_Helpers::is_two_step_required() ); ?>
261	<?php disabled( Jetpack_SSO_Helpers::is_require_two_step_checkbox_disabled() ); ?>
262	>
263	<?php esc_html_e( 'Require Two-Step Authentication' , 'jetpack' ); ?>
264	</label>
265	<?php
266	}
267
268	/**
269	* Validate the require two step checkbox in Settings > General
270	*
271	* @since 2.7
272	* @return boolean
273	**/
274	public function validate_jetpack_sso_require_two_step( $input ) {
275	return ( ! empty( $input ) ) ? 1 : 0;
276	}
277
278	/**
279	* Builds the display for the checkbox allowing the user to allow matching logins by email
280	* Displays in Settings > General
281	*
282	* @since 2.9
283	**/
284	public function render_match_by_email() {
285	?>
286	<label>
287	<input
288	type="checkbox"
289	name="jetpack_sso_match_by_email"
290	<?php checked( Jetpack_SSO_Helpers::match_by_email() ); ?>
291	<?php disabled( Jetpack_SSO_Helpers::is_match_by_email_checkbox_disabled() ); ?>
292	>
293	<?php esc_html_e( 'Match by Email', 'jetpack' ); ?>
294	</label>
295	<?php
296	}
297
298	/**
299	* Validate the match by email check in Settings > General
300	*
301	* @since 2.9
302	* @return boolean
303	**/
304	public function validate_jetpack_sso_match_by_email( $input ) {
305	return ( ! empty( $input ) ) ? 1 : 0;
306	}
307
308	/**
309	* Checks to determine if the user wants to login on wp-login
310	*
311	* This function mostly exists to cover the exceptions to login
312	* that may exist as other parameters to $_GET[action] as $_GET[action]
313	* does not have to exist. By default WordPress assumes login if an action
314	* is not set, however this may not be true, as in the case of logout
315	* where $_GET[loggedout] is instead set
316	*
317	* @return boolean
318	**/
319	private function wants_to_login() {
320	$wants_to_login = false;
321
322	// Cover default WordPress behavior
323	$action = isset( $_REQUEST['action'] ) ? $_REQUEST['action'] : 'login';
324
325	// And now the exceptions
326	$action = isset( $_GET['loggedout'] ) ? 'loggedout' : $action;
327
328	if ( 'login' == $action ) {
329	$wants_to_login = true;
330	}
331
332	return $wants_to_login;
333	}
334
335	function login_init() {
336	global $action;
337
338	if ( Jetpack_SSO_Helpers::should_hide_login_form() ) {
339	/**
340	* Since the default authenticate filters fire at priority 20 for checking username and password,
341	* let's fire at priority 30. wp_authenticate_spam_check is fired at priority 99, but since we return a
342	* WP_Error in disable_default_login_form, then we won't trigger spam processing logic.
343	*/
344	add_filter( 'authenticate', array( 'Jetpack_SSO_Notices', 'disable_default_login_form' ), 30 );
345
346	/**
347	* Filter the display of the disclaimer message appearing when default WordPress login form is disabled.
348	*
349	* @module sso
350	*
351	* @since 2.8.0
352	*
353	* @param bool true Should the disclaimer be displayed. Default to true.
354	*/
355	$display_sso_disclaimer = apply_filters( 'jetpack_sso_display_disclaimer', true );
356	if ( $display_sso_disclaimer ) {
357	add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'msg_login_by_jetpack' ) );
358	}
359	}
360
361	/**
362	* If the user is attempting to logout AND the auto-forward to WordPress.com
363	* login is set then we need to ensure we do not auto-forward the user and get
364	* them stuck in an infinite logout loop.
365	*/
366	if ( isset( $_GET['loggedout'] ) && Jetpack_SSO_Helpers::bypass_login_forward_wpcom() ) {
367	add_filter( 'jetpack_remove_login_form', '__return_true' );
368	}
369
370	/**
371	* Check to see if the site admin wants to automagically forward the user
372	* to the WordPress.com login page AND that the request to wp-login.php
373	* is not something other than login (Like logout!)
374	*/
375	if (
376	$this->wants_to_login()
377	&& Jetpack_SSO_Helpers::bypass_login_forward_wpcom()
378	) {
379	add_filter( 'allowed_redirect_hosts', array( 'Jetpack_SSO_Helpers', 'allowed_redirect_hosts' ) );
380	$this->maybe_save_cookie_redirect();
381	$reauth = ! empty( $_GET['force_reauth'] );
382	$sso_url = $this->get_sso_url_or_die( $reauth );
383	JetpackTracking::record_user_event( 'sso_login_redirect_bypass_success' );
384	wp_safe_redirect( $sso_url );
385	exit;
386	}
387
388	if ( 'login' === $action ) {
389	$this->display_sso_login_form();
390	} elseif ( 'jetpack-sso' === $action ) {
391	if ( isset( $_GET['result'], $_GET['user_id'], $_GET['sso_nonce'] ) && 'success' == $_GET['result'] ) {
392	$this->handle_login();
393	$this->display_sso_login_form();
394	} else {
395	if ( Jetpack::is_staging_site() ) {
396	add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'sso_not_allowed_in_staging' ) );
397	} else {
398	$this->maybe_save_cookie_redirect();
399	// Is it wiser to just use wp_redirect than do this runaround to wp_safe_redirect?
400	add_filter( 'allowed_redirect_hosts', array( 'Jetpack_SSO_Helpers', 'allowed_redirect_hosts' ) );
401	$reauth = ! empty( $_GET['force_reauth'] );
402	$sso_url = $this->get_sso_url_or_die( $reauth );
403	JetpackTracking::record_user_event( 'sso_login_redirect_success' );
404	wp_safe_redirect( $sso_url );
405	exit;
406	}
407	}
408	}
409	}
410
411	/**
412	* Ensures that we can get a nonce from WordPress.com via XML-RPC before setting
413	* up the hooks required to display the SSO form.
414	*/
415	public function display_sso_login_form() {
416	add_filter( 'login_body_class', array( $this, 'login_body_class' ) );
417	add_action( 'login_head', array( $this, 'print_inline_admin_css' ) );
418
419	if ( Jetpack::is_staging_site() ) {
420	add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'sso_not_allowed_in_staging' ) );
421	return;
422	}
423
424	$sso_nonce = self::request_initial_nonce();
425	if ( is_wp_error( $sso_nonce ) ) {
426	return;
427	}
428
429	add_action( 'login_form', array( $this, 'login_form' ) );
430	add_action( 'login_enqueue_scripts', array( $this, 'login_enqueue_scripts' ) );
431	}
432
433	/**
434	* Conditionally save the redirect_to url as a cookie.
435	*/
436	public static function maybe_save_cookie_redirect() {
437	if ( headers_sent() ) {
438	return new WP_Error( 'headers_sent', __( 'Cannot deal with cookie redirects, as headers are already sent.', 'jetpack' ) );
439	}
440
441	if ( ! empty( $_GET['redirect_to'] ) ) {
442	// If we have something to redirect to
443	$url = esc_url_raw( $_GET['redirect_to'] );
444	setcookie( 'jetpack_sso_redirect_to', $url, time() + HOUR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN, false, true );
445
446	} elseif ( ! empty( $_COOKIE['jetpack_sso_redirect_to'] ) ) {
447	// Otherwise, if it's already set, purge it.
448	setcookie( 'jetpack_sso_redirect_to', ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
449	}
450	}
451
452	/**
453	* Outputs the Jetpack SSO button and description as well as the toggle link
454	* for switching between Jetpack SSO and default login.
455	*/
456	function login_form() {
457	$site_name = get_bloginfo( 'name' );
458	if ( ! $site_name ) {
459	$site_name = get_bloginfo( 'url' );
460	}
461
462	$display_name = ! empty( $_COOKIE[ 'jetpack_sso_wpcom_name_' . COOKIEHASH ] )
463	? $_COOKIE[ 'jetpack_sso_wpcom_name_' . COOKIEHASH ]
464	: false;
465	$gravatar = ! empty( $_COOKIE[ 'jetpack_sso_wpcom_gravatar_' . COOKIEHASH ] )
466	? $_COOKIE[ 'jetpack_sso_wpcom_gravatar_' . COOKIEHASH ]
467	: false;
468
469	?>
470	<div id="jetpack-sso-wrap">
471	<?php if ( $display_name && $gravatar ) : ?>
472	<div id="jetpack-sso-wrap__user">
473	<img width="72" height="72" src="<?php echo esc_html( $gravatar ); ?>" />
474
475	<h2>
476	<?php
477	echo wp_kses(
478	sprintf( __( 'Log in as <span>%s</span>', 'jetpack' ), esc_html( $display_name ) ),
479	array( 'span' => true )
480	);
481	?>
482	</h2>
483	</div>
484
485	<?php endif; ?>
486
487
488	<div id="jetpack-sso-wrap__action">
489	<?php echo $this->build_sso_button( array(), 'is_primary' ); ?>
490
491	<?php if ( $display_name && $gravatar ) : ?>
492	<a rel="nofollow" class="jetpack-sso-wrap__reauth" href="<?php echo esc_url( $this->build_sso_button_url( array( 'force_reauth' => '1' ) ) ); ?>">
493	<?php esc_html_e( 'Log in as a different WordPress.com user', 'jetpack' ); ?>
494	</a>
495	<?php else : ?>
496	<p>
497	<?php
498	echo esc_html(
499	sprintf(
500	__( 'You can now save time spent logging in by connecting your WordPress.com account to %s.', 'jetpack' ),
501	esc_html( $site_name )
502	)
503	);
504	?>
505	</p>
506	<?php endif; ?>
507	</div>
508
509	<?php if ( ! Jetpack_SSO_Helpers::should_hide_login_form() ) : ?>
510	<div class="jetpack-sso-or">
511	<span><?php esc_html_e( 'Or', 'jetpack' ); ?></span>
512	</div>
513
514	<a href="<?php echo esc_url( add_query_arg( 'jetpack-sso-show-default-form', '1' ) ); ?>" class="jetpack-sso-toggle wpcom">
515	<?php
516	esc_html_e( 'Log in with username and password', 'jetpack' )
517	?>
518	</a>
519
520	<a href="<?php echo esc_url( add_query_arg( 'jetpack-sso-show-default-form', '0' ) ); ?>" class="jetpack-sso-toggle default">
521	<?php
522	esc_html_e( 'Log in with WordPress.com', 'jetpack' )
523	?>
524	</a>
525	<?php endif; ?>
526	</div>
527	<?php
528	}
529
530	/**
531	* Clear the cookies that store the profile information for the last
532	* WPCOM user to connect.
533	*/
534	static function clear_wpcom_profile_cookies() {
535	if ( isset( $_COOKIE[ 'jetpack_sso_wpcom_name_' . COOKIEHASH ] ) ) {
536	setcookie(
537	'jetpack_sso_wpcom_name_' . COOKIEHASH,
538	' ',
539	time() - YEAR_IN_SECONDS,
540	COOKIEPATH,
541	COOKIE_DOMAIN
542	);
543	}
544
545	if ( isset( $_COOKIE[ 'jetpack_sso_wpcom_gravatar_' . COOKIEHASH ] ) ) {
546	setcookie(
547	'jetpack_sso_wpcom_gravatar_' . COOKIEHASH,
548	' ',
549	time() - YEAR_IN_SECONDS,
550	COOKIEPATH,
551	COOKIE_DOMAIN
552	);
553	}
554	}
555
556	static function delete_connection_for_user( $user_id ) {
557	if ( ! $wpcom_user_id = get_user_meta( $user_id, 'wpcom_user_id', true ) ) {
558	return;
559	}
560	Jetpack::load_xml_rpc_client();
561	$xml = new Jetpack_IXR_Client( array(
562	'wpcom_user_id' => $user_id,
563	) );
564	$xml->query( 'jetpack.sso.removeUser', $wpcom_user_id );
565
566	if ( $xml->isError() ) {
567	return false;
568	}
569
570	// Clean up local data stored for SSO
571	delete_user_meta( $user_id, 'wpcom_user_id' );
572	delete_user_meta( $user_id, 'wpcom_user_data' );
573	self::clear_wpcom_profile_cookies();
574
575	return $xml->getResponse();
576	}
577
578	static function request_initial_nonce() {
579	Jetpack::load_xml_rpc_client();
580	$xml = new Jetpack_IXR_Client( array(
581	'user_id' => get_current_user_id(),
582	) );
583	$xml->query( 'jetpack.sso.requestNonce' );
584
585	if ( $xml->isError() ) {
586	return new WP_Error( $xml->getErrorCode(), $xml->getErrorMessage() );
587	}
588
589	return $xml->getResponse();
590	}
591
592	/**
593	* The function that actually handles the login!
594	*/
595	function handle_login() {
596	$wpcom_nonce = sanitize_key( $_GET['sso_nonce'] );
597	$wpcom_user_id = (int) $_GET['user_id'];
598
599	Jetpack::load_xml_rpc_client();
600	$xml = new Jetpack_IXR_Client( array(
601	'user_id' => get_current_user_id(),
602	) );
603	$xml->query( 'jetpack.sso.validateResult', $wpcom_nonce, $wpcom_user_id );
604
605	$user_data = $xml->isError() ? false : $xml->getResponse();
606	if ( empty( $user_data ) ) {
607	add_filter( 'jetpack_sso_default_to_sso_login', '__return_false' );
608	add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'error_invalid_response_data' ) );
609	return;
610	}
611
612	$user_data = (object) $user_data;
613	$user = null;
614
615	/**
616	* Fires before Jetpack's SSO modifies the log in form.
617	*
618	* @module sso
619	*
620	* @since 2.6.0
621	*
622	* @param object $user_data WordPress.com User information.
623	*/
624	do_action( 'jetpack_sso_pre_handle_login', $user_data );
625
626	if ( Jetpack_SSO_Helpers::is_two_step_required() && 0 === (int) $user_data->two_step_enabled ) {
627	$this->user_data = $user_data;
628
629	JetpackTracking::record_user_event( 'sso_login_failed', array(
630	'error_message' => 'error_msg_enable_two_step'
631	) );
632
633	/** This filter is documented in core/src/wp-includes/pluggable.php */
634	do_action( 'wp_login_failed', $user_data->login );
635	add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'error_msg_enable_two_step' ) );
636	return;
637	}
638
639	$user_found_with = '';
640	if ( empty( $user ) && isset( $user_data->external_user_id ) ) {
641	$user_found_with = 'external_user_id';
642	$user = get_user_by( 'id', intval( $user_data->external_user_id ) );
643	if ( $user ) {
644	update_user_meta( $user->ID, 'wpcom_user_id', $user_data->ID );
645	}
646	}
647
648	// If we don't have one by wpcom_user_id, try by the email?
649	if ( empty( $user ) && Jetpack_SSO_Helpers::match_by_email() ) {
650	$user_found_with = 'match_by_email';
651	$user = get_user_by( 'email', $user_data->email );
652	if ( $user ) {
653	update_user_meta( $user->ID, 'wpcom_user_id', $user_data->ID );
654	}
655	}
656
657	// If we've still got nothing, create the user.
658	if ( empty( $user ) && ( get_option( 'users_can_register' ) \|\| Jetpack_SSO_Helpers::new_user_override() ) ) {
659	/**
660	* If not matching by email we still need to verify the email does not exist
661	* or this blows up
662	*
663	* If match_by_email is true, we know the email doesn't exist, as it would have
664	* been found in the first pass. If get_user_by( 'email' ) doesn't find the
665	* user, then we know that email is unused, so it's safe to add.
666	*/
667	if ( Jetpack_SSO_Helpers::match_by_email() \|\| ! get_user_by( 'email', $user_data->email ) ) {
668	$user = Jetpack_SSO_Helpers::generate_user( $user_data );
669	if ( ! $user ) {
670	JetpackTracking::record_user_event( 'sso_login_failed', array(
671	'error_message' => 'could_not_create_username'
672	) );
673	add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'error_unable_to_create_user' ) );
674	return;
675	}
676
677	$user_found_with = Jetpack_SSO_Helpers::new_user_override()
678	? 'user_created_new_user_override'
679	: 'user_created_users_can_register';
680	} else {
681	JetpackTracking::record_user_event( 'sso_login_failed', array(
682	'error_message' => 'error_msg_email_already_exists'
683	) );
684
685	$this->user_data = $user_data;
686	add_action( 'login_message', array( 'Jetpack_SSO_Notices', 'error_msg_email_already_exists' ) );
687	return;
688	}
689	}
690
691	/**
692	* Fires after we got login information from WordPress.com.
693	*
694	* @module sso
695	*
696	* @since 2.6.0
697	*
698	* @param array $user Local User information.
699	* @param object $user_data WordPress.com User Login information.
700	*/
701	do_action( 'jetpack_sso_handle_login', $user, $user_data );
702
703	if ( $user ) {
704	// Cache the user's details, so we can present it back to them on their user screen
705	update_user_meta( $user->ID, 'wpcom_user_data', $user_data );
706
707	add_filter( 'auth_cookie_expiration', array( 'Jetpack_SSO_Helpers', 'extend_auth_cookie_expiration_for_sso' ) );
708	wp_set_auth_cookie( $user->ID, true );
709	remove_filter( 'auth_cookie_expiration', array( 'Jetpack_SSO_Helpers', 'extend_auth_cookie_expiration_for_sso' ) );
710
711	/** This filter is documented in core/src/wp-includes/user.php */
712	do_action( 'wp_login', $user->user_login, $user );
713
714	wp_set_current_user( $user->ID );
715
716	$_request_redirect_to = isset( $_REQUEST['redirect_to'] ) ? esc_url_raw( $_REQUEST['redirect_to'] ) : '';
717	$redirect_to = user_can( $user, 'edit_posts' ) ? admin_url() : self::profile_page_url();
718
719	// If we have a saved redirect to request in a cookie
720	if ( ! empty( $_COOKIE['jetpack_sso_redirect_to'] ) ) {
721	// Set that as the requested redirect to
722	$redirect_to = $_request_redirect_to = esc_url_raw( $_COOKIE['jetpack_sso_redirect_to'] );
723	// And then purge it
724	setcookie( 'jetpack_sso_redirect_to', ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
725	}
726
727	$is_user_connected = Jetpack::is_user_connected( $user->ID );
728	JetpackTracking::record_user_event( 'sso_user_logged_in', array(
729	'user_found_with' => $user_found_with,
730	'user_connected' => (bool) $is_user_connected,
731	'user_role' => Jetpack::translate_current_user_to_role()
732	) );
733
734	if ( ! $is_user_connected ) {
735	$calypso_env = ! empty( $_GET['calypso_env'] )
736	? sanitize_key( $_GET['calypso_env'] )
737	: '';
738
739	wp_safe_redirect(
740	add_query_arg(
741	array(
742	'redirect_to' => $redirect_to,
743	'request_redirect_to' => $_request_redirect_to,
744	'calypso_env' => $calypso_env,
745	'jetpack-sso-auth-redirect' => '1',
746	),
747	admin_url()
748	)
749	);
750	exit;
751	}
752
753	wp_safe_redirect(
754	/** This filter is documented in core/src/wp-login.php */
755	apply_filters( 'login_redirect', $redirect_to, $_request_redirect_to, $user )
756	);
757	exit;
758	}
759
760	add_filter( 'jetpack_sso_default_to_sso_login', '__return_false' );
761
762	JetpackTracking::record_user_event( 'sso_login_failed', array(
763	'error_message' => 'cant_find_user'
764	) );
765
766	$this->user_data = $user_data;
767	/** This filter is documented in core/src/wp-includes/pluggable.php */
768	do_action( 'wp_login_failed', $user_data->login );
769	add_filter( 'login_message', array( 'Jetpack_SSO_Notices', 'cant_find_user' ) );
770	}
771
772	static function profile_page_url() {
773	return admin_url( 'profile.php' );
774	}
775
776	/**
777	* Builds the "Login to WordPress.com" button that is displayed on the login page as well as user profile page.
778	*
779	* @param array $args An array of arguments to add to the SSO URL.
780	* @param boolean $is_primary Should the button have the `button-primary` class?
781	* @return string Returns the HTML markup for the button.
782	*/
783	function build_sso_button( $args = array(), $is_primary = false ) {
784	$url = $this->build_sso_button_url( $args );
785	$classes = $is_primary
786	? 'jetpack-sso button button-primary'
787	: 'jetpack-sso button';
788
789	return sprintf(
790	'<a rel="nofollow" href="%1$s" class="%2$s"><span>%3$s %4$s</span></a>',
791	esc_url( $url ),
792	$classes,
793	'<span class="genericon genericon-wordpress"></span>',
794	esc_html__( 'Log in with WordPress.com', 'jetpack' )
795	);
796	}
797
798	/**
799	* Builds a URL with `jetpack-sso` action and option args which is used to setup SSO.
800	*
801	* @param array $args An array of arguments to add to the SSO URL.
802	* @return string The URL used for SSO.
803	*/
804	function build_sso_button_url( $args = array() ) {
805	$defaults = array(
806	'action' => 'jetpack-sso',
807	);
808
809	$args = wp_parse_args( $args, $defaults );
810
811	if ( ! empty( $_GET['redirect_to'] ) ) {
812	$args['redirect_to'] = urlencode( esc_url_raw( $_GET['redirect_to'] ) );
813	}
814
815	return add_query_arg( $args, wp_login_url() );
816	}
817
818	/**
819	* Retrieves a WordPress.com SSO URL with appropriate query parameters or dies.
820	*
821	* @param boolean $reauth Should the user be forced to reauthenticate on WordPress.com?
822	* @param array $args Optional query parameters.
823	* @return string The WordPress.com SSO URL.
824	*/
825	function get_sso_url_or_die( $reauth = false, $args = array() ) {
826	if ( empty( $reauth ) ) {
827	$sso_redirect = $this->build_sso_url( $args );
828	} else {
829	self::clear_wpcom_profile_cookies();
830	$sso_redirect = $this->build_reauth_and_sso_url( $args );
831	}
832
833	// If there was an error retrieving the SSO URL, then error.
834	if ( is_wp_error( $sso_redirect ) ) {
835	$error_message = sanitize_text_field(
836	sprintf( '%s: %s', $sso_redirect->get_error_code(), $sso_redirect->get_error_message() )
837	);
838	JetpackTracking::record_user_event( 'sso_login_redirect_failed', array(
839	'error_message' => $error_message
840	) );
841	wp_die( $error_message );
842	}
843
844	return $sso_redirect;
845	}
846
847	/**
848	* Build WordPress.com SSO URL with appropriate query parameters.
849	*
850	* @param array $args Optional query parameters.
851	* @return string WordPress.com SSO URL
852	*/
853	function build_sso_url( $args = array() ) {
854	$sso_nonce = ! empty( $args['sso_nonce'] ) ? $args['sso_nonce'] : self::request_initial_nonce();
855	$defaults = array(
856	'action' => 'jetpack-sso',
857	'site_id' => Jetpack_Options::get_option( 'id' ),
858	'sso_nonce' => $sso_nonce,
859	'calypso_auth' => '1',
860	);
861
862	$args = wp_parse_args( $args, $defaults );
863
864	if ( is_wp_error( $args['sso_nonce'] ) ) {
865	return $args['sso_nonce'];
866	}
867
868	return add_query_arg( $args, 'https://wordpress.com/wp-login.php' );
869	}
870
871	/**
872	* Build WordPress.com SSO URL with appropriate query parameters,
873	* including the parameters necessary to force the user to reauthenticate
874	* on WordPress.com.
875	*
876	* @param array $args Optional query parameters.
877	* @return string WordPress.com SSO URL
878	*/
879	function build_reauth_and_sso_url( $args = array() ) {
880	$sso_nonce = ! empty( $args['sso_nonce'] ) ? $args['sso_nonce'] : self::request_initial_nonce();
881	$redirect = $this->build_sso_url( array( 'force_auth' => '1', 'sso_nonce' => $sso_nonce ) );
882
883	if ( is_wp_error( $redirect ) ) {
884	return $redirect;
885	}
886
887	$defaults = array(
888	'action' => 'jetpack-sso',
889	'site_id' => Jetpack_Options::get_option( 'id' ),
890	'sso_nonce' => $sso_nonce,
891	'reauth' => '1',
892	'redirect_to' => urlencode( $redirect ),
893	'calypso_auth' => '1',
894	);
895
896	$args = wp_parse_args( $args, $defaults );
897
898	if ( is_wp_error( $args['sso_nonce'] ) ) {
899	return $args['sso_nonce'];
900	}
901
902	return add_query_arg( $args, 'https://wordpress.com/wp-login.php' );
903	}
904
905	/**
906	* Determines local user associated with a given WordPress.com user ID.
907	*
908	* @since 2.6.0
909	*
910	* @param int $wpcom_user_id User ID from WordPress.com
911	* @return object Local user object if found, null if not.
912	*/
913	static function get_user_by_wpcom_id( $wpcom_user_id ) {
914	$user_query = new WP_User_Query( array(
915	'meta_key' => 'wpcom_user_id',
916	'meta_value' => intval( $wpcom_user_id ),
917	'number' => 1,
918	) );
919
920	$users = $user_query->get_results();
921	return $users ? array_shift( $users ) : null;
922	}
923
924	/**
925	* When jetpack-sso-auth-redirect query parameter is set, will redirect user to
926	* WordPress.com authorization flow.
927	*
928	* We redirect here instead of in handle_login() because Jetpack::init()->build_connect_url
929	* calls menu_page_url() which doesn't work properly until admin menus are registered.
930	*/
931	function maybe_authorize_user_after_sso() {
932	if ( empty( $_GET['jetpack-sso-auth-redirect'] ) ) {
933	return;
934	}
935
936	$redirect_to = ! empty( $_GET['redirect_to'] ) ? esc_url_raw( $_GET['redirect_to'] ) : admin_url();
937	$request_redirect_to = ! empty( $_GET['request_redirect_to'] ) ? esc_url_raw( $_GET['request_redirect_to'] ) : $redirect_to;
938
939	/** This filter is documented in core/src/wp-login.php */
940	$redirect_after_auth = apply_filters( 'login_redirect', $redirect_to, $request_redirect_to, wp_get_current_user() );
941
942	/**
943	* Since we are passing this redirect to WordPress.com and therefore can not use wp_safe_redirect(),
944	* let's sanitize it here to make sure it's safe. If the redirect is not safe, then use admin_url().
945	*/
946	$redirect_after_auth = wp_sanitize_redirect( $redirect_after_auth );
947	$redirect_after_auth = wp_validate_redirect( $redirect_after_auth, admin_url() );
948
949	/**
950	* Return the raw connect URL with our redirect and attribute connection to SSO.
951	*/
952	$connect_url = Jetpack::init()->build_connect_url( true, $redirect_after_auth, 'sso' );
953
954	add_filter( 'allowed_redirect_hosts', array( 'Jetpack_SSO_Helpers', 'allowed_redirect_hosts' ) );
955	wp_safe_redirect( $connect_url );
956	exit;
957	}
958
959	/**
960	* Cache user's display name and Gravatar so it can be displayed on the login screen. These cookies are
961	* stored when the user logs out, and then deleted when the user logs in.
962	*/
963	function store_wpcom_profile_cookies_on_logout() {
964	if ( ! Jetpack::is_user_connected( get_current_user_id() ) ) {
965	return;
966	}
967
968	$user_data = $this->get_user_data( get_current_user_id() );
969	if ( ! $user_data ) {
970	return;
971	}
972
973	setcookie(
974	'jetpack_sso_wpcom_name_' . COOKIEHASH,
975	$user_data->display_name,
976	time() + WEEK_IN_SECONDS,
977	COOKIEPATH,
978	COOKIE_DOMAIN
979	);
980
981	setcookie(
982	'jetpack_sso_wpcom_gravatar_' . COOKIEHASH,
983	get_avatar_url(
984	$user_data->email,
985	array( 'size' => 144, 'default' => 'mystery' )
986	),
987	time() + WEEK_IN_SECONDS,
988	COOKIEPATH,
989	COOKIE_DOMAIN
990	);
991	}
992
993	/**
994	* Determines if a local user is connected to WordPress.com
995	*
996	* @since 2.8
997	* @param integer $user_id - Local user id
998	* @return boolean
999	**/
1000	public function is_user_connected( $user_id ) {
1001	return $this->get_user_data( $user_id );
1002	}
1003
1004	/**
1005	* Retrieves a user's WordPress.com data
1006	*
1007	* @since 2.8
1008	* @param integer $user_id - Local user id
1009	* @return mixed null or stdClass
1010	**/
1011	public function get_user_data( $user_id ) {
1012	return get_user_meta( $user_id, 'wpcom_user_data', true );
1013	}
1014	}
1015
1016	Jetpack_SSO::get_instance();
1017