<?php // phpcs:ignore - WordPress.Files.FileName.InvalidClassFileName use Automattic\Jetpack\Connection\Client; use Automattic\Jetpack\Redirect; /** * Class Jetpack_Protect_Blocked_Login_Page * * Instanciated on the wp-login page when Jetpack modules are loaded and $pagenow * is available, or during the login_head hook. * * Class will only be instanciated if Protect has detected a hard blocked IP address. */ class Jetpack_Protect_Blocked_Login_Page { /** * Instance of the class. * * @var Jetpack_Protect_Blocked_Login_Page */ private static $instance = null; /** * Can send recovery emails. defaults to true. * * @var bool */ public $can_send_recovery_emails; /** * The IP address. * * @var string */ public $ip_address; /** * Valid blocked user ID. * * @var int */ public $valid_blocked_user_id; /** * The email address. * * @var string */ public $email_address; /** * URL to support page * * @deprecated 8.5.0 Use Jetpack_Protect_Blocked_Login_Page::get_help_url() * @see Jetpack_Protect_Blocked_Login_Page::get_help_url() * * @var string string $HELP_URL */ const HELP_URL = 'https://jetpack.com/support/security-features/#unblock'; const HTTP_STATUS_CODE_TOO_MANY_REQUESTS = 429; /** * Singleton implementation * * @param string $ip_address - the IP address. * * @return object */ public static function instance( $ip_address ) { if ( ! is_a( self::$instance, 'Jetpack_Protect_Blocked_Login_Page' ) ) { self::$instance = new Jetpack_Protect_Blocked_Login_Page( $ip_address ); } return self::$instance; } /** * Singleton implementation * * @param string $ip_address - the IP address. */ public function __construct( $ip_address ) { /** * Filter controls if an email recovery form is shown to blocked IPs. * * A recovery form allows folks to re-gain access to the login form * via an email link if their IP was mistakenly blocked. * * @module protect * * @since 5.6.0 * * @param bool $can_send_recovery_emails Defaults to true. */ $this->can_send_recovery_emails = apply_filters( 'jetpack_protect_can_send_recovery_emails', true ); $this->ip_address = $ip_address; add_filter( 'wp_authenticate_user', array( $this, 'check_valid_blocked_user' ), 10, 1 ); add_filter( 'site_url', array( $this, 'add_args_to_login_post_url' ), 10, 3 ); add_filter( 'network_site_url', array( $this, 'add_args_to_login_post_url' ), 10, 3 ); add_filter( 'lostpassword_url', array( $this, 'add_args_to_lostpassword_url' ), 10, 2 ); add_filter( 'login_url', array( $this, 'add_args_to_login_url' ), 10, 3 ); add_filter( 'lostpassword_redirect', array( $this, 'add_args_to_lostpassword_redirect_url' ), 10, 1 ); } /** * Gets the URL that redirects to the support page on unblocking * * @since 8.5.0 * * @return string */ public static function get_help_url() { return Redirect::get_url( 'jetpack-support-security-features', array( 'anchor' => 'unblock' ) ); } /** * Add arguments to lost password redirect url. * * @param string $url - the URL. */ public function add_args_to_lostpassword_redirect_url( $url ) { if ( $this->valid_blocked_user_id ) { $url = empty( $url ) ? wp_login_url() : $url; $url = add_query_arg( array( 'validate_jetpack_protect_recovery' => isset( $_GET['validate_jetpack_protect_recovery'] ) ? filter_var( wp_unslash( $_GET['validate_jetpack_protect_recovery'] ) ) : null, // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Nothing on the site is changed in response to this request. 'user_id' => isset( $_GET['user_id'] ) ? (int) $_GET['user_id'] : null, // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Nothing on the site is changed in response to this request. 'checkemail' => 'confirm', ), $url ); } return $url; } /** * Add arguments to lost password redirect url. * * @param string $url - the URL. * @param string $redirect - where to redirect to. */ public function add_args_to_lostpassword_url( $url, $redirect ) { if ( $this->valid_blocked_user_id ) { $args = array( 'validate_jetpack_protect_recovery' => isset( $_GET['validate_jetpack_protect_recovery'] ) ? filter_var( wp_unslash( $_GET['validate_jetpack_protect_recovery'] ) ) : null, // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Nothing on the site is changed in response to this request. 'user_id' => isset( $_GET['user_id'] ) ? (int) $_GET['user_id'] : null, // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Nothing on the site is changed in response to this request. 'action' => 'lostpassword', ); if ( ! empty( $redirect ) ) { $args['redirect_to'] = $redirect; } $url = add_query_arg( $args, $url ); } return $url; } /** * Add arguments to login post url. * * @param string $url - the URL. * @param string $path - the path. * @param string $scheme -the scheme(?). */ public function add_args_to_login_post_url( $url, $path, $scheme ) { if ( $this->valid_blocked_user_id && ( 'login_post' === $scheme || 'login' === $scheme ) ) { $url = add_query_arg( array( 'validate_jetpack_protect_recovery' => isset( $_GET['validate_jetpack_protect_recovery'] ) ? filter_var( wp_unslash( $_GET['validate_jetpack_protect_recovery'] ) ) : null, // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Nothing on the site is changed in response to this request. 'user_id' => isset( $_GET['user_id'] ) ? (int) $_GET['user_id'] : null, // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Nothing on the site is changed in response to this request. ), $url ); } return $url; } /** * Add arguments to login post url. * * @param string $url - the URL. * @param string $redirect - where we want to redirect to. * @param string $force_reauth -if we're forcing reauthorization. */ public function add_args_to_login_url( $url, $redirect, $force_reauth ) { if ( $this->valid_blocked_user_id ) { $args = array( 'validate_jetpack_protect_recovery' => isset( $_GET['validate_jetpack_protect_recovery'] ) ? filter_var( wp_unslash( $_GET['validate_jetpack_protect_recovery'] ) ) : null, // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Nothing on the site is changed in response to this request. 'user_id' => isset( $_GET['user_id'] ) ? (int) $_GET['user_id'] : null, // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Nothing on the site is changed in response to this request. ); if ( ! empty( $redirect ) ) { $args['redirect_to'] = $redirect; } if ( ! empty( $force_reauth ) ) { $args['reauth'] = '1'; } $url = add_query_arg( $args, $url ); } return $url; } /** * Check if user is blocked. * * @param string $user - the user. */ public function check_valid_blocked_user( $user ) { if ( $this->valid_blocked_user_id && $this->valid_blocked_user_id != $user->ID ) { // phpcs:ignore Universal.Operators.StrictComparisons.LooseNotEqual return new WP_Error( 'invalid_recovery_token', __( 'The recovery token is not valid for this user.', 'jetpack' ) ); } return $user; } /** * Check if user is valid. */ public function is_blocked_user_valid() { if ( ! $this->can_send_recovery_emails ) { return false; } if ( $this->valid_blocked_user_id ) { return true; } if ( ! isset( $_GET['validate_jetpack_protect_recovery'], $_GET['user_id'] ) ) { // phpcs:ignore: WordPress.Security.NonceVerification.Recommended -- no changes made if this isn't set. return false; } if ( ! $this->is_valid_protect_recovery_key( filter_var( wp_unslash( $_GET['validate_jetpack_protect_recovery'] ) ), (int) $_GET['user_id'] ) ) { // phpcs:ignore: WordPress.Security.NonceVerification.Recommended -- no changes made if this isn't set. return false; } $this->valid_blocked_user_id = (int) $_GET['user_id']; // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Nothing on the site is changed in response to this request. return true; } /** * Checks if recovery key is valid. * * @param string $key - they recovery key. * @param string $user_id - the User ID. */ public function is_valid_protect_recovery_key( $key, $user_id ) { $path = sprintf( '/sites/%d/protect/recovery/confirm', Jetpack::get_option( 'id' ) ); $response = Client::wpcom_json_api_request_as_blog( $path, '1.1', array( 'method' => 'post', ), array( 'token' => $key, 'user_id' => $user_id, 'ip' => $this->ip_address, ) ); $result = json_decode( wp_remote_retrieve_body( $response ) ); if ( is_wp_error( $result ) || empty( $result ) || isset( $result->error ) ) { return false; } return true; } /** * Check if we should render the recovery form. */ public function render_and_die() { if ( ! $this->can_send_recovery_emails ) { $this->render_blocked_login_message(); return; } if ( isset( $_GET['validate_jetpack_protect_recovery'] ) && ! empty( $_GET['user_id'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- no site changes, just throws invalid token error. $error = new WP_Error( 'invalid_token', __( "Oops, we couldn't validate the recovery token.", 'jetpack' ) ); $this->protect_die( $error ); return; } if ( isset( $_GET['jetpack-protect-recovery'] ) && isset( $_POST['_wpnonce'] ) && wp_verify_nonce( $_POST['_wpnonce'], 'bypass-protect' ) // phpcs:ignore WordPress.Security.ValidatedSanitizedInput -- WP Core doesn't unstrip or sanitize nonces either. ) { $this->process_recovery_email(); return; } if ( isset( $_GET['loggedout'] ) && 'true' === $_GET['loggedout'] ) { $this->protect_die( __( 'You successfully logged out.', 'jetpack' ) ); } $this->render_recovery_form(); } /** * Render the blocked login message. */ public function render_blocked_login_message() { $this->protect_die( $this->get_html_blocked_login_message() ); } /** * Process sending a recovery email. */ public function process_recovery_email() { $sent = $this->send_recovery_email(); $show_recovery_form = true; if ( is_wp_error( $sent ) ) { if ( 'email_already_sent' === $sent->get_error_code() ) { $show_recovery_form = false; } $this->protect_die( $sent, null, true, $show_recovery_form ); } else { $this->render_recovery_success(); } } /** * Send the recovery form. */ public function send_recovery_email() { $email = isset( $_POST['email'] ) ? wp_unslash( $_POST['email'] ) : ''; // phpcs:ignore WordPress.Security.NonceVerification.Missing, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- only triggered after bypass-protect nonce check is done, and sanitization is checked on the next line. if ( sanitize_email( $email ) !== $email || ! is_email( $email ) ) { return new WP_Error( 'invalid_email', __( "Oops, looks like that's not the right email address. Please try again!", 'jetpack' ) ); } $user = get_user_by( 'email', trim( $email ) ); if ( ! $user ) { return new WP_Error( 'invalid_user', __( "Oops, we couldn't find a user with that email. Please try again!", 'jetpack' ) ); } $this->email_address = $email; $path = sprintf( '/sites/%d/protect/recovery/request', Jetpack::get_option( 'id' ) ); $response = Client::wpcom_json_api_request_as_blog( $path, '1.1', array( 'method' => 'post', ), array( 'user_id' => $user->ID, 'ip' => $this->ip_address, ) ); $code = wp_remote_retrieve_response_code( $response ); $result = json_decode( wp_remote_retrieve_body( $response ) ); if ( self::HTTP_STATUS_CODE_TOO_MANY_REQUESTS === $code ) { // translators: email address the recovery instructions were sent to. return new WP_Error( 'email_already_sent', sprintf( __( 'Recovery instructions were sent to %s. Check your inbox!', 'jetpack' ), $this->email_address ) ); } elseif ( is_wp_error( $result ) || empty( $result ) || isset( $result->error ) ) { return new WP_Error( 'email_send_error', __( 'Oops, we were unable to send a recovery email. Try again.', 'jetpack' ) ); } return true; } /** * Prevent login by locking the login page. * * @param string $content - the content of the page. * @param string $title - the page title. * @param string $back_link - the back link. * @param string $recovery_form - the recovery form. */ public function protect_die( $content, $title = null, $back_link = false, $recovery_form = false ) { if ( empty( $title ) ) { $title = __( 'Jetpack has locked your site\'s login page.', 'jetpack' ); } if ( is_wp_error( $content ) ) { $svg = '<svg class="gridicon gridicons-notice" height="24" width="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><g><path d="M12 2C6.477 2 2 6.477 2 12s4.477 10 10 10 10-4.477 10-10S17.523 2 12 2zm1 15h-2v-2h2v2zm0-4h-2l-.5-6h3l-.5 6z"/></g></svg>'; $content = '<span class="error"> ' . $svg . $content->get_error_message() . '</span>'; } $content = '<p>' . $content . '</p>'; // If for some reason the login pop up box show up in the wp-admin. if ( isset( $_GET['interim-login'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- no changes to the site itself, just rendering an error message. $content = '<style>html{ background-color: #fff; } #error-message { margin:0 auto; padding: 1em; box-shadow: none; } </style>' . $content; } $this->display_page( $title, $content, $back_link, $recovery_form ); } /** * Render the recovery form. */ public function render_recovery_form() { $content = $this->get_html_blocked_login_message(); $this->protect_die( $content, null, null, true ); } /** * Render the recovery instructions. */ public function render_recovery_success() { // translators: the email address the recovery email was sent to. $this->protect_die( sprintf( __( 'Recovery instructions were sent to %s. Check your inbox!', 'jetpack' ), $this->email_address ) ); } /** * Get the HTML for the blocked login message. */ public function get_html_blocked_login_message() { $icon = '<svg class="gridicon gridicons-spam" style="fill:#d94f4f" height="24" width="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><g><path d="M17 2H7L2 7v10l5 5h10l5-5V7l-5-5zm-4 15h-2v-2h2v2zm0-4h-2l-.5-6h3l-.5 6z"/></g></svg>'; $ip = str_replace( 'http://', '', esc_url( 'http://' . $this->ip_address ) ); return sprintf( // translators: the IP address that was flagged. __( '<p>Your IP address <code>%2$s</code> has been flagged for potential security violations. You can unlock your login by sending yourself a special link via email. <a href="%3$s">Learn More</a></p>', 'jetpack' ), // phpcs:ignore WordPress.WP.I18n.NoHtmlWrappedStrings $icon, $ip, esc_url( self::get_help_url() ) ); } /** * Get the HTML recovery form. */ public function get_html_recovery_form() { ob_start(); ?> <div> <form method="post" action="?jetpack-protect-recovery=true"> <?php wp_nonce_field( 'bypass-protect' ); ?> <p><label for="email"><?php esc_html_e( 'Your email', 'jetpack' ); ?><br/></label> <input type="email" name="email" class="text-input"/> <input type="submit" class="button" value="<?php esc_attr_e( 'Send email', 'jetpack' ); ?>"/> </p> </form> </div> <?php $contents = ob_get_contents(); ob_end_clean(); return $contents; } /** * Display the page. * * @param string $title - the page title. * @param string $message - the message we're sending. * @param string $back_button - the back button. * @param string $recovery_form - the recovery form. */ public function display_page( $title, $message, $back_button = false, $recovery_form = false ) { if ( ! headers_sent() ) { nocache_headers(); header( 'Content-Type: text/html; charset=utf-8' ); } $text_direction = 'ltr'; if ( is_rtl() ) { $text_direction = 'rtl'; } ?> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" <?php if ( function_exists( 'language_attributes' ) && function_exists( 'is_rtl' ) ) { language_attributes(); } else { echo "dir='$text_direction'"; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped } ?> > <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width"> <?php if ( get_option( 'blog_public' ) ) { echo "<meta name='robots' content='noindex,follow' />\n"; } else { echo "<meta name='robots' content='noindex,nofollow' />\n"; } ?> <title><?php echo esc_html( $title ); ?></title> <style type="text/css"> html { background: #f6f6f6; } body { color: #2e4453; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif; margin: 2em auto; padding: 1em 2em; max-width: 460px; text-align: left; } body.is-rtl { text-align: right; } h1 { clear: both; color: #3d596d; font-size: 24px; margin:0 0 24px 0; padding: 0; font-weight: 400; } #error-message { box-sizing: border-box; background: white; box-shadow: 0 0 0 1px rgba(200, 215, 225, 0.5), 0 1px 2px #e9eff3; padding: 24px; } #error-message img { margin: 0 auto; display: block; } #error-page { margin-top: 50px; } #error-page p { font-size: 14px; line-height: 1.5; margin: 24px 0 0; } #error-page code { font-family: Consolas, Monaco, monospace; } ul li { margin-bottom: 10px; font-size: 14px; } a { color: #00aadc; } label { font-weight: bold; font-size:16px; } a:hover, a:active { color: #0085be; } a:focus { color: #124964; -webkit-box-shadow: 0 0 0 1px #4f94d4, 0 0 2px 1px rgba(30, 140, 190, .8); box-shadow: 0 0 0 1px #4f94d4, 0 0 2px 1px rgba(30, 140, 190, .8); outline: none; } .button { background: #00aadc; color: white; border-color: #008ab3; border-style: solid; border-width: 1px 1px 2px; cursor: pointer; display: inline-block; margin: 0; margin-right: 0px; outline: 0; overflow: hidden; font-weight: 500; text-overflow: ellipsis; text-decoration: none; vertical-align: top; box-sizing: border-box; font-size: 14px; line-height: 21px; border-radius: 4px; padding: 7px 14px 9px; -webkit-appearance: none; -moz-appearance: none; appearance: none; font-size: 14px; width: 100%; } .button:hover, .button:focus { border-color: #005082; outline: none; } .button:focus { border-color: #005082; -webkit-box-shadow: 0 0 3px rgba(0, 115, 170, .8); box-shadow: 0 0 3px rgba(0, 115, 170, .8); outline: none; } .button::-moz-focus-inner { border: 0; } .button:active { border-width: 2px 1px 1px; } .gridicon { fill: currentColor; vertical-align: middle; } #error-footer { padding: 16px; } #error-footer a { text-decoration: none; line-height:20px; font-size: 14px; color: #4f748e; } #error-footer a:hover { color: #2e4453; } #error-footer .gridicon{ width: 16px; } #error-footer .gridicons-help { width: 24px; margin-right:8px; } .is-rtl #error-footer .gridicons-help { margin-left:8px; } .error { background: #d94f4f; color:#FFF; display: block; border-radius: 3px; line-height: 1.5; padding: 16px; padding-left: 42px; } .is-rtl .error { padding-right: 42px; } .error .gridicon { float: left; margin-left: -32px; } .is-rtl .error .gridicon { float: right; margin-right: -32px; } .text-input { margin: 0; padding: 7px 14px; width: 100%; color: #2e4453; font-size: 16px; line-height: 1.5; border: 1px solid #c8d7e1; background-color: white; transition: all .15s ease-in-out; box-sizing: border-box; margin: 8px 0 16px; } #image { display: block; width: 200px; margin: 0 auto; } <?php $rtl_class = ''; if ( 'rtl' === $text_direction ) { $rtl_class = 'class="is-rtl"'; echo 'body { font-family: Tahoma, Arial; }'; } ?> </style> </head> <body id="error-page" <?php echo 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viewBox="0 0 24 24"><g><path d="M12 4l-1.41 1.41L16.17 11H4v2h12.17l-5.58 5.59L12 20l8-8-8-8z"/></g></svg>'; } else { $back_button_icon = '<svg class="gridicon gridicons-arrow-left" height="24" width="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><g><path d="M20 11H7.83l5.59-5.59L12 4l-8 8 8 8 1.41-1.41L7.83 13H20v-2z"/></g></svg>'; } ?> <a href='javascript:history.back()' <?php printf( /* translators: %s is HTML markup, for a back icon. */ __( '%s Back', 'jetpack' ), // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped $back_button_icon // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ); ?> </a> <?php } else { $help_icon = '<svg class="gridicon gridicons-help" height="24" width="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><g><path d="M12 2C6.477 2 2 6.477 2 12s4.477 10 10 10 10-4.477 10-10S17.523 2 12 2zm1 16h-2v-2h2v2zm0-4.14V15h-2v-2c0-.552.448-1 1-1 1.103 0 2-.897 2-2s-.897-2-2-2-2 .897-2 2H8c0-2.21 1.79-4 4-4s4 1.79 4 4c0 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