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<title>[9941] sites/trunk/common/includes/wporg-sso: Login: Add remote-login functionality to the SSO login code.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="http://meta.trac.wordpress.org/changeset/9941">9941</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"http://meta.trac.wordpress.org/changeset/9941","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>dd32</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2020-05-29 03:14:48 +0000 (Fri, 29 May 2020)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Login: Add remote-login functionality to the SSO login code.
This will allow for instances of WordPress in the WordPress.org network (and using it's user tables) to login via login.wordpress.org.
See <a href="http://meta.trac.wordpress.org/ticket/5239">#5239</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#sitestrunkcommonincludeswporgssoclasswporgssophp">sites/trunk/common/includes/wporg-sso/class-wporg-sso.php</a></li>
<li><a href="#sitestrunkcommonincludeswporgssowppluginphp">sites/trunk/common/includes/wporg-sso/wp-plugin.php</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="sitestrunkcommonincludeswporgssoclasswporgssophp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: sites/trunk/common/includes/wporg-sso/class-wporg-sso.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- sites/trunk/common/includes/wporg-sso/class-wporg-sso.php 2020-05-29 01:56:01 UTC (rev 9940)
+++ sites/trunk/common/includes/wporg-sso/class-wporg-sso.php 2020-05-29 03:14:48 UTC (rev 9941)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1,7 +1,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> <?php
</span><span class="cx" style="display: block; padding: 0 10px"> if ( ! class_exists( 'WPOrg_SSO' ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * Single Sign-On (SSO) handling for WordPress/bbPress instances under *.wordpress.org.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * Single Sign-On (SSO) handling for WordPress/bbPress instances on wordpress.org.
</ins><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * @author stephdau
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -10,6 +10,13 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> const SUPPORT_EMAIL = 'forum-password-resets@wordpress.org';
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ const VALID_HOSTS = [
+ 'wordpress.org',
+ 'bbpress.org',
+ 'buddypress.org',
+ 'wordcamp.org'
+ ];
+
</ins><span class="cx" style="display: block; padding: 0 10px"> public $sso_host_url;
</span><span class="cx" style="display: block; padding: 0 10px"> public $sso_login_url;
</span><span class="cx" style="display: block; padding: 0 10px"> public $sso_signup_url;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -75,6 +82,10 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $login_url = add_query_arg( 'redirect_to', urlencode( $redirect_to ), $login_url );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ! preg_match( '!wordpress\.org$!', $this->host ) ) {
+ $login_url = add_query_arg( 'from', $this->host, $login_url );
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> return $login_url;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -116,10 +127,10 @@
</span><span class="cx" style="display: block; padding: 0 10px"> } else if ( ! empty( $_SERVER['HTTP_REFERER'] ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> // We didn't get a redirect_to, but we got a referrer, use that if a valid target.
</span><span class="cx" style="display: block; padding: 0 10px"> $redirect_to_referrer = $_SERVER['HTTP_REFERER'];
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( $this->_is_valid_targeted_domain( $redirect_to_referrer ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( $this->_is_valid_targeted_domain( $redirect_to_referrer ) && self::SSO_HOST != parse_url( $redirect_to_referrer, PHP_URL_HOST ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> $redirect_to = $redirect_to_referrer;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- } else {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ } elseif ( self::SSO_HOST !== $this->host ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> // Otherwise, attempt to guess the parent dir of where they came from and validate that.
</span><span class="cx" style="display: block; padding: 0 10px"> $redirect_to_source_parent = preg_replace( '/\/[^\/]+\.php\??.*$/', '/', "https://{$this->host}{$_SERVER['REQUEST_URI']}" );
</span><span class="cx" style="display: block; padding: 0 10px"> if ( $this->_is_valid_targeted_domain( $redirect_to_source_parent ) ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -131,28 +142,28 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * Tests if the passed host/domain, or URL, is part of the WordPress.org domain.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * Tests if the passed host/domain, or URL, is part of the WordPress.org network.
</ins><span class="cx" style="display: block; padding: 0 10px"> *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * @param unknown $string A domain, hostname, or URL
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @param unknown $host A domain, hostname, or URL
</ins><span class="cx" style="display: block; padding: 0 10px"> * @return boolean True is ok, false if not
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- protected function _is_valid_targeted_domain( $string ) {
- if ( empty( $string ) || ! is_string( $string ) ) {
- $string = '';
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ protected function _is_valid_targeted_domain( $host ) {
+ if ( empty( $host ) || ! is_string( $host ) || ! strstr( $host, '.' ) ) {
+ return false;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( strstr( $string , '/' ) ) {
- $url = parse_url( $string );
- $host = ( ! empty( $url['host'] ) ) ? $url['host'] : '';
- } else {
- $host = $string;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( strstr( $host, '/' ) ) {
+ $host = parse_url( $host, PHP_URL_HOST );
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( ! empty( $host ) && strstr( $host , '.' ) ) {
- return ( preg_match( '/^(.+\.)?wordpress\.org$/', $host ) ) ? true : false;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( in_array( $host, self::VALID_HOSTS, true ) ) {
+ return true;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- return false;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // If not a top-level domain, shrink it down and try again.
+ $top_level_host = implode( '.', array_slice( explode( '.', $host ), -2 ) );
+
+ return in_array( $top_level_host, self::VALID_HOSTS, true );
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span></span></pre></div>
<a id="sitestrunkcommonincludeswporgssowppluginphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: sites/trunk/common/includes/wporg-sso/wp-plugin.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- sites/trunk/common/includes/wporg-sso/wp-plugin.php 2020-05-29 01:56:01 UTC (rev 9940)
+++ sites/trunk/common/includes/wporg-sso/wp-plugin.php 2020-05-29 03:14:48 UTC (rev 9941)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -66,6 +66,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'login_url', [ $this, 'add_locale' ], 21 );
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'register_url', [ $this, 'add_locale' ], 21 );
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'lostpassword_url', [ $this, 'add_locale' ], 21 );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ } else {
+ add_filter( 'login_redirect', [ $this, 'maybe_add_remote_login_bounce_to_post_login_url' ], 10, 3 );
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -185,10 +187,22 @@
</span><span class="cx" style="display: block; padding: 0 10px"> // If we're not on the SSO host
</span><span class="cx" style="display: block; padding: 0 10px"> if ( preg_match( '!/wp-login\.php$!', $this->script ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> // Don't redirect the 'confirmaction' wp-login handlers to login.wordpress.org.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( isset( $_GET['action'] ) && empty( $_POST ) && 'confirmaction' == $_GET['action'] ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( isset( $_GET['action'] ) && empty( $_POST ) && 'confirmaction' == $_GET['action'] ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> return;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // Allow logout on non-dotorg hosts.
+ if ( isset( $_GET['action'] ) && empty( $_POST ) && 'logout' == $_GET['action'] ) {
+ if ( ! preg_match( '!wordpress\.org$!', $_SERVER['HTTP_HOST'] ) ) {
+ return;
+ }
+ }
+
+ // Remote SSO login?
+ if ( isset( $_GET['action'] ) && 'remote-login' === $_GET['action'] && ! empty( $_GET['sso_token'] ) ) {
+ $this->_maybe_perform_remote_login();
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> // If on a WP login screen...
</span><span class="cx" style="display: block; padding: 0 10px"> $redirect_to_sso_login = $this->sso_login_url;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -199,6 +213,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> // Pay extra attention to the post-process redirect_to
</span><span class="cx" style="display: block; padding: 0 10px"> $redirect_to_sso_login = add_query_arg( 'redirect_to', urlencode( $redirect_req ), $redirect_to_sso_login );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ! preg_match( '!wordpress\.org$!', $this->host ) ) {
+ $redirect_to_sso_login = add_query_arg( 'from', $this->host, $redirect_to_sso_login );
+ }
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> // And actually redirect to the SSO login
</span><span class="cx" style="display: block; padding: 0 10px"> $this->_safe_redirect( $redirect_to_sso_login, 301 );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -243,7 +260,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> } else {
</span><span class="cx" style="display: block; padding: 0 10px"> // Else let the theme render, or redirect if logged in
</span><span class="cx" style="display: block; padding: 0 10px"> if ( is_user_logged_in() ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $this->_redirect_to_profile();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $this->_redirect_to_source_or_profile();
</ins><span class="cx" style="display: block; padding: 0 10px"> } else {
</span><span class="cx" style="display: block; padding: 0 10px"> if ( empty( $_GET['screen'] ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'login_form_defaults', array( $this, 'login_form_defaults' ) );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -258,13 +275,13 @@
</span><span class="cx" style="display: block; padding: 0 10px"> // No redirect, just display robots.
</span><span class="cx" style="display: block; padding: 0 10px"> } else if ( is_user_logged_in() ) {
</span><span class="cx" style="display: block; padding: 0 10px"> // Otherwise, redirect to the their profile.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $this->_redirect_to_profile();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $this->_redirect_to_source_or_profile();
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> } elseif ( ( is_admin() && is_super_admin() ) || 0 === strpos( $_SERVER['REQUEST_URI'], '/wp-json' ) || 0 === strpos( $_SERVER['REQUEST_URI'], '/xmlrpc.php' ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> // Do nothing, allow access to wp-admin, wp-json and xmlrpc.php on login.wordpress.org
</span><span class="cx" style="display: block; padding: 0 10px"> } elseif ( is_user_logged_in() ) {
</span><span class="cx" style="display: block; padding: 0 10px"> // Logged in catch all, before last fallback
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $this->_redirect_to_profile();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $this->_redirect_to_source_or_profile();
</ins><span class="cx" style="display: block; padding: 0 10px"> } else {
</span><span class="cx" style="display: block; padding: 0 10px"> // Otherwise, redirect to the login screen.
</span><span class="cx" style="display: block; padding: 0 10px"> $this->_safe_redirect( $this->sso_login_url, 301 );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -364,19 +381,108 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * Redirects the user to her/his (support) profile.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * Redirects the user back to where they came from (or w.org profile)
</ins><span class="cx" style="display: block; padding: 0 10px"> */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- protected function _redirect_to_profile() {
- if ( ! is_user_logged_in() ) {
- return;
- }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ protected function _redirect_to_source_or_profile() {
+ $redirect = $this->_get_safer_redirect_to();
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( ! empty( $_GET['redirect_to'] ) ) {
- $this->_safe_redirect( $this->_get_safer_redirect_to() );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( $redirect ) {
+ $this->_safe_redirect( $this->_maybe_add_remote_login_bounce( $redirect ) );
+ } elseif ( is_user_logged_in() ) {
+ $this->_safe_redirect( 'https://profiles.wordpress.org/' . wp_get_current_user()->user_nicename . '/' );
</ins><span class="cx" style="display: block; padding: 0 10px"> } else {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $this->_safe_redirect( 'https://profiles.wordpress.org/' . wp_get_current_user()->user_nicename . '/' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $this->_safe_redirect( 'https://wordpress.org/' );
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+ /**
+ * Logs in a user on the current domain on a remote-login action.
+ */
+ protected function _maybe_perform_remote_login() {
+ $remote_token = wp_unslash( $_GET['sso_token'] );
+ if ( ! is_string( $remote_token ) || 3 !== substr_count( $remote_token, '|' ) ) {
+ wp_die( 'Invalid token.' );
+ }
+
+ list( $user_id, $sso_hash, $valid_until, $remember_me ) = explode( '|', $remote_token, 4 );
+
+ $remote_expiration_valid = (
+ // +/- 5s on a 5s timeout.
+ $valid_until >= ( time() - 5 ) &&
+ $valid_until <= ( time() + 10 )
+ );
+
+ $valid_remote_hash = false;
+ $user = get_user_by( 'id', $user_id );
+ if ( $user ) {
+ $valid_remote_hash = hash_equals(
+ $this->_generate_remote_login_hash( $user, $valid_until, $remember_me ),
+ $sso_hash
+ );
+ }
+
+ if ( $remote_expiration_valid && $valid_remote_hash ) {
+ wp_set_current_user( (int) $user_id );
+ wp_set_auth_cookie( (int) $user_id, (bool) $remember_me );
+
+ if ( isset( $_GET['redirect_to'] ) ) {
+ $this->_safe_redirect( wp_unslash( $_GET['redirect_to'] ) );
+ } else {
+ $this->_safe_redirect( home_url( '/' ) );
+ }
+ exit;
+ }
+
+ return false;
+ }
+
+ public function maybe_add_remote_login_bounce_to_post_login_url( $redirect, $requested, $user ) {
+ return $this->_maybe_add_remote_login_bounce( $redirect, $user );
+ }
+
+ protected function _maybe_add_remote_login_bounce( $redirect, $user = false ) {
+ if ( ! $user ) {
+ $user = wp_get_current_user();
+ }
+
+ // If it's on a different _supported_ host, bounce through the remote-login.
+ $redirect_host = parse_url( $redirect, PHP_URL_HOST );
+
+ if ( $user && $this->_is_valid_targeted_domain( $redirect_host ) && ! preg_match( '!wordpress.org$!i', $redirect_host ) ) {
+
+ // Fetch auth cookie parts to find out if the user has selected 'remember me'.
+ $auth_cookie_parts = wp_parse_auth_cookie( '', 'secure_auth' );
+
+ $valid_until = time() + 5; // Super short timeout.
+ $remember_me = ! empty( $_POST['rememberme'] ) || ( $auth_cookie_parts && $auth_cookie_parts['expiration'] >= ( time() + ( 2 * DAY_IN_SECONDS ) ) );
+
+ $hash = $this->_generate_remote_login_hash( $user, $valid_until, $remember_me );
+ $sso_token = $user->ID . '|' . $hash . '|' . $valid_until . '|' . $remember_me;
+
+ $redirect = add_query_arg(
+ array(
+ 'action' => 'remote-login',
+ 'sso_token' => urlencode( $sso_token ),
+ 'redirect_to' => urlencode( $redirect ),
+ ),
+ 'https://' . $redirect_host . '/wp-login.php' // Assume that wp-login exists and is accessible
+ );
+ }
+
+ return $redirect;
+ }
+
+ /**
+ * Generate a hash for remote-login for non-wordpress.org domains
+ */
+ protected function _generate_remote_login_hash( $user, $valid_until, $remember_me = false ) {
+ // re-use the same frag that Auth cookies use to invalidate sessions.
+ $pass_frag = substr( $user->user_pass, 8, 4 );
+ $key = wp_hash( $user->user_login . '|' . $pass_frag . '|' . $valid_until );
+ $hash = hash_hmac( 'sha256', $user->user_login . '|' . $valid_until . '|' . (int) $remember_me, $key );
+
+ return $hash;
+ }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> new WP_WPOrg_SSO();
</span></span></pre>
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