private static $__instance = null;

public $api_key;

public $api_key_error;

public $whitelist;

public $whitelist_error;

public $whitelist_saved;

private $user_ip;

private $local_host;

private $api_endpoint;

public $last_request;

public $last_response_raw;

public $last_response;

private $block_login_with_math;

/**

public static function instance() {

if ( ! is_a( self::$__instance, 'Jetpack_Protect_Module' ) ) {

self::$__instance = new Jetpack_Protect_Module();

}

return self::$__instance;

}

/**

private function __construct() {

add_action( 'jetpack_activate_module_protect', array ( $this, 'on_activation' ) );

add_action( 'jetpack_deactivate_module_protect', array ( $this, 'on_deactivation' ) );

add_action( 'jetpack_modules_loaded', array ( $this, 'modules_loaded' ) );

add_action( 'login_init', array ( $this, 'check_use_math' ) );

add_filter( 'authenticate', array ( $this, 'check_preauth' ), 10, 3 );

add_action( 'wp_login', array ( $this, 'log_successful_login' ), 10, 2 );

add_action( 'wp_login_failed', array ( $this, 'log_failed_attempt' ) );

add_action( 'admin_init', array ( $this, 'maybe_update_headers' ) );

add_action( 'admin_init', array ( $this, 'maybe_display_security_warning' ) );

// This is a backup in case $pagenow fails for some reason

add_action( 'login_head', array ( $this, 'check_login_ability' ) );

// Runs a script every day to clean up expired transients so they don't

// clog up our users' databases

require_once( JETPACK__PLUGIN_DIR . '/modules/protect/transient-cleanup.php' );

}

/**

public function on_activation() {

if ( is_multisite() && is_main_site() && get_site_option( 'jetpack_protect_active', 0 ) == 0 ) {

update_site_option( 'jetpack_protect_active', 1 );

}

update_site_option( 'jetpack_protect_activating', 'activating' );

// Get BruteProtect's counter number

Jetpack_Protect_Module::protect_call( 'check_key' );

}

/**

public function on_deactivation() {

if ( is_multisite() && is_main_site() ) {

update_site_option( 'jetpack_protect_active', 0 );

}

}

public function maybe_get_protect_key() {

if ( get_site_option( 'jetpack_protect_activating', false ) && ! get_site_option( 'jetpack_protect_key', false ) ) {

$key = $this->get_protect_key();

delete_site_option( 'jetpack_protect_activating' );

return $key;

}

return get_site_option( 'jetpack_protect_key' );

}

/**

public function maybe_update_headers( $force = false ) {

$updated_recently = $this->get_transient( 'jpp_headers_updated_recently' );

if ( ! $force ) {

if ( isset( $_GET['protect_update_headers'] ) ) {

$force = true;

}

}

// check that current user is admin so we prevent a lower level user from adding

// a trusted header, allowing them to brute force an admin account

if ( ( $updated_recently && ! $force ) || ! current_user_can( 'update_plugins' ) ) {

return;

}

$response = Jetpack_Protect_Module::protect_call( 'check_key' );

$this->set_transient( 'jpp_headers_updated_recently', 1, DAY_IN_SECONDS );

if ( isset( $response['msg'] ) && $response['msg'] ) {

update_site_option( 'trusted_ip_header', json_decode( $response['msg'] ) );

}

}

public function maybe_display_security_warning() {

if ( is_multisite() && current_user_can( 'manage_network' ) ) {

if ( ! function_exists( 'is_plugin_active_for_network' ) ) {

require_once( ABSPATH . '/wp-admin/includes/plugin.php' );

}

if ( ! is_plugin_active_for_network( 'jetpack/jetpack.php' ) ) {

add_action( 'load-index.php', array ( $this, 'prepare_jetpack_protect_multisite_notice' ) );

}

}

}

public function prepare_jetpack_protect_multisite_notice() {

add_action( 'admin_print_styles', array ( $this, 'admin_banner_styles' ) );

add_action( 'admin_notices', array ( $this, 'admin_jetpack_manage_notice' ) );

}

public function admin_banner_styles() {

global $wp_styles;

$min = ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '' : '.min';

wp_enqueue_style( 'jetpack', plugins_url( "css/jetpack-banners{$min}.css", JETPACK__PLUGIN_FILE ), false, JETPACK__VERSION );

$wp_styles->add_data( 'jetpack', 'rtl', true );

}

public function admin_jetpack_manage_notice() {

$dismissed = get_site_option( 'jetpack_dismissed_protect_multisite_banner' );

if ( $dismissed ) {

return;

}

$referer = '&_wp_http_referer=' . add_query_arg( '_wp_http_referer', null );

$opt_out_url = wp_nonce_url( Jetpack::admin_url( 'jetpack-notice=jetpack-protect-multisite-opt-out' . $referer ), 'jetpack_protect_multisite_banner_opt_out' );

?>

<div id="message" class="updated jetpack-message jp-banner is-opt-in protect-error"

style="display:block !important;">

<a class="jp-banner__dismiss" href="<?php echo esc_url( $opt_out_url ); ?>"

title="<?php esc_attr_e( 'Dismiss this notice.', 'jetpack' ); ?>"></a>

<div class="jp-banner__content">

<h2><?php esc_html_e( 'Protect cannot keep your site secure.', 'jetpack' ); ?></h2>

<p><?php printf( __( 'Thanks for activating Protect! To start protecting your site, please network activate Jetpack on your Multisite installation and activate Protect on your primary site. Due to the way logins are handled on WordPress Multisite, Jetpack must be network-enabled in order for Protect to work properly. <a href="%s" target="_blank">Learn More</a>', 'jetpack' ), 'http://jetpack.com/support/multisite-protect' ); ?></p>

</div>

<div class="jp-banner__action-container is-opt-in">

<a href="<?php echo esc_url( network_admin_url( 'plugins.php' ) ); ?>" class="jp-banner__button"

id="wpcom-connect"><?php _e( 'View Network Admin', 'jetpack' ); ?></a>

</div>

</div>

<?php

}

/**

public function get_protect_key() {

$protect_blog_id = Jetpack_Protect_Module::get_main_blog_jetpack_id();

// If we can't find the the blog id, that means we are on multisite, and the main site never connected

// the protect api key is linked to the main blog id - instruct the user to connect their main blog

if ( ! $protect_blog_id ) {

$this->api_key_error = __( 'Your main blog is not connected to WordPress.com. Please connect to get an API key.', 'jetpack' );

return false;

}

$request = array (

'jetpack_blog_id' => $protect_blog_id,

'bruteprotect_api_key' => get_site_option( 'bruteprotect_api_key' ),

'multisite' => '0',

);

// Send the number of blogs on the network if we are on multisite

if ( is_multisite() ) {

$request['multisite'] = get_blog_count();

if ( ! $request['multisite'] ) {

global $wpdb;

$request['multisite'] = $wpdb->get_var( "SELECT COUNT(blog_id) as c FROM $wpdb->blogs WHERE spam = '0' AND deleted = '0' and archived = '0'" );

}

}

// Request the key

Jetpack::load_xml_rpc_client();

$xml = new Jetpack_IXR_Client( array (

'user_id' => get_current_user_id()

) );

$xml->query( 'jetpack.protect.requestKey', $request );

// Hmm, can't talk to wordpress.com

if ( $xml->isError() ) {

$code = $xml->getErrorCode();

$message = $xml->getErrorMessage();

$this->api_key_error = sprintf( __( 'Error connecting to WordPress.com. Code: %1$s, %2$s', 'jetpack' ), $code, $message );

return false;

}

$response = $xml->getResponse();

// Hmm. Can't talk to the protect servers ( api.bruteprotect.com )

if ( ! isset( $response['data'] ) ) {

$this->api_key_error = __( 'No reply from Jetpack servers', 'jetpack' );

return false;

}

// There was an issue generating the key

if ( empty( $response['success'] ) ) {

$this->api_key_error = $response['data'];

return false;

}

// Key generation successful!

$active_plugins = Jetpack::get_active_plugins();

// We only want to deactivate BruteProtect if we successfully get a key

if ( in_array( 'bruteprotect/bruteprotect.php', $active_plugins ) ) {

Jetpack_Client_Server::deactivate_plugin( 'bruteprotect/bruteprotect.php', 'BruteProtect' );

}

$key = $response['data'];

update_site_option( 'jetpack_protect_key', $key );

return $key;

}

/**

function log_failed_attempt() {

/**

do_action( 'jpp_log_failed_attempt', jetpack_protect_get_ip() );

if ( isset( $_COOKIE['jpp_math_pass'] ) ) {

$transient = $this->get_transient( 'jpp_math_pass_' . $_COOKIE['jpp_math_pass'] );

$transient--;

if ( ! $transient || $transient < 1 ) {

$this->delete_transient( 'jpp_math_pass_' . $_COOKIE['jpp_math_pass'] );

setcookie( 'jpp_math_pass', 0, time() - DAY_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN, false );

} else {

$this->set_transient( 'jpp_math_pass_' . $_COOKIE['jpp_math_pass'], $transient, DAY_IN_SECONDS );

}

}

$this->protect_call( 'failed_attempt' );

}

/**

public function modules_loaded() {

Jetpack::enable_module_configurable( __FILE__ );

Jetpack::module_configuration_load( __FILE__, array ( $this, 'configuration_load' ) );

Jetpack::module_configuration_head( __FILE__, array ( $this, 'configuration_head' ) );

Jetpack::module_configuration_screen( __FILE__, array ( $this, 'configuration_screen' ) );

}

/**

public function log_successful_login( $user_login, $user ) {

$this->protect_call( 'successful_login', array ( 'roles' => $user->roles ) );

}

/**

function check_preauth( $user = 'Not Used By Protect', $username = 'Not Used By Protect', $password = 'Not Used By Protect' ) {

$allow_login = $this->check_login_ability( true );

$use_math = $this->get_transient( 'brute_use_math' );

if ( ! $allow_login ) {

$this->block_with_math();

}

if ( ( 1 == $use_math || 1 == $this->block_login_with_math ) && isset( $_POST['log'] ) ) {

include_once dirname( __FILE__ ) . '/protect/math-fallback.php';

Jetpack_Protect_Math_Authenticate::math_authenticate();

}

return $user;

}

/**

function get_headers() {

$ip_related_headers = array (

'GD_PHP_HANDLER',

'HTTP_AKAMAI_ORIGIN_HOP',

'HTTP_CF_CONNECTING_IP',

'HTTP_CLIENT_IP',

'HTTP_FASTLY_CLIENT_IP',

'HTTP_FORWARDED',

'HTTP_FORWARDED_FOR',

'HTTP_INCAP_CLIENT_IP',

'HTTP_TRUE_CLIENT_IP',

'HTTP_X_CLIENTIP',

'HTTP_X_CLUSTER_CLIENT_IP',

'HTTP_X_FORWARDED',

'HTTP_X_FORWARDED_FOR',

'HTTP_X_IP_TRAIL',

'HTTP_X_REAL_IP',

'HTTP_X_VARNISH',

'REMOTE_ADDR'

);

foreach ( $ip_related_headers as $header ) {

if ( isset( $_SERVER[ $header ] ) ) {

$output[ $header ] = $_SERVER[ $header ];

}

}

return $output;

}

/*

function ip_is_whitelisted( $ip ) {

// If we found an exact match in wp-config

if ( defined( 'JETPACK_IP_ADDRESS_OK' ) && JETPACK_IP_ADDRESS_OK == $ip ) {

return true;

}

$whitelist = jetpack_protect_get_local_whitelist();

if ( is_multisite() ) {

$whitelist = array_merge( $whitelist, get_site_option( 'jetpack_protect_global_whitelist', array () ) );

}

if ( ! empty( $whitelist ) ) :

foreach ( $whitelist as $item ) :

// If the IPs are an exact match

if ( ! $item->range && isset( $item->ip_address ) && $item->ip_address == $ip ) {

return true;

}

if ( $item->range && isset( $item->range_low ) && isset( $item->range_high ) ) {

if ( jetpack_protect_ip_address_is_in_range( $ip, $item->range_low, $item->range_high ) ) {

return true;

}

}

endforeach;

endif;

return false;

}

/**

function check_login_ability( $preauth = false ) {

$ip = jetpack_protect_get_ip();

// Server is misconfigured and we can't get an IP

if ( ! $ip && class_exists( 'Jetpack' ) ) {

Jetpack::deactivate_module( 'protect' );

ob_start();

Jetpack::state( 'message', 'protect_misconfigured_ip' );

ob_end_clean();

return true;

}

/**

if ( apply_filters( 'jpp_allow_login', false, $ip ) ) {

return true;

}

$headers = $this->get_headers();

$header_hash = md5( json_encode( $headers ) );

$transient_name = 'jpp_li_' . $header_hash;

$transient_value = $this->get_transient( $transient_name );

if ( jetpack_protect_ip_is_private( $ip ) ) {

return true;

}

if ( $this->ip_is_whitelisted( $ip ) ) {

return true;

}

// Check out our transients

if ( isset( $transient_value ) && 'ok' == $transient_value['status'] ) {

return true;

}

if ( isset( $transient_value ) && 'blocked' == $transient_value['status'] ) {

$this->block_with_math();

}

if ( isset( $transient_value ) && 'blocked-hard' == $transient_value['status'] ) {

$this->kill_login();

}

// If we've reached this point, this means that the IP isn't cached.

// Now we check with the Protect API to see if we should allow login

$response = $this->protect_call( $action = 'check_ip' );

if ( isset( $response['math'] ) && ! function_exists( 'brute_math_authenticate' ) ) {

include_once dirname( __FILE__ ) . '/protect/math-fallback.php';

new Jetpack_Protect_Math_Authenticate;

return false;

}

if ( 'blocked' == $response['status'] ) {

$this->block_with_math();

}

if ( 'blocked-hard' == $response['status'] ) {

$this->kill_login();

}

return true;

}

function block_with_math() {

/**

$this->block_login_with_math = 1;

/**

$allow_math_fallback_on_fail = apply_filters( 'jpp_use_captcha_when_blocked', true );

if ( ! $allow_math_fallback_on_fail ) {

$this->kill_login();

}

include_once dirname( __FILE__ ) . '/protect/math-fallback.php';

new Jetpack_Protect_Math_Authenticate;

return false;

}

/*

function kill_login() {

$ip = jetpack_protect_get_ip();

/**

do_action( 'jpp_kill_login', $ip );

$help_url = 'http://jetpack.com/support/security/';

$die_string = sprintf( __( 'Your IP (%1$s) has been flagged for potential security violations. <a href="%2$s">Find out more...</a>', 'jetpack' ), str_replace( 'http://', '', esc_url( 'http://' . $ip ) ), esc_url( $help_url ) );

if( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) {

$die_string = sprintf( __( 'Your IP (%1$s) has been flagged for potential security violations.', 'jetpack' ), str_replace( 'http://', '', esc_url( 'http://' . $ip ) ) );

}

wp_die(

$die_string,

__( 'Login Blocked by Jetpack', 'jetpack' ),

array ( 'response' => 403 )

);

}

/*

public function check_use_math() {

$use_math = $this->get_transient( 'brute_use_math' );

if ( $use_math ) {

include_once dirname( __FILE__ ) . '/protect/math-fallback.php';

new Jetpack_Protect_Math_Authenticate;

}

}

/**

public function configuration_load() {

if ( isset( $_POST['action'] ) && $_POST['action'] == 'jetpack_protect_save_whitelist' && wp_verify_nonce( $_POST['_wpnonce'], 'jetpack-protect' ) ) {

$whitelist = str_replace( ' ', '', $_POST['whitelist'] );

$whitelist = explode( PHP_EOL, $whitelist );

$result = jetpack_protect_save_whitelist( $whitelist );

$this->whitelist_saved = ! is_wp_error( $result );

$this->whitelist_error = is_wp_error( $result );

}

if ( isset( $_POST['action'] ) && 'get_protect_key' == $_POST['action'] && wp_verify_nonce( $_POST['_wpnonce'], 'jetpack-protect' ) ) {

$result = $this->get_protect_key();

// Only redirect on success

// If it fails we need access to $this->api_key_error

if ( $result ) {

wp_safe_redirect( Jetpack::module_configuration_url( 'protect' ) );

}

}

$this->api_key = get_site_option( 'jetpack_protect_key', false );

$this->user_ip = jetpack_protect_get_ip();

}

public function configuration_head() {

wp_enqueue_style( 'jetpack-protect' );

}

/**

public function configuration_screen() {

require_once dirname( __FILE__ ) . '/protect/config-ui.php';

}

/**

public function get_main_blog_id() {

if ( ! is_multisite() ) {

return false;

}

global $current_site;

$primary_blog_id = $current_site->blog_id;

return $primary_blog_id;

}

/**

public function get_main_blog_jetpack_id() {

if ( ! is_main_site() ) {

switch_to_blog( $this->get_main_blog_id() );

$id = Jetpack::get_option( 'id', false );

restore_current_blog();

} else {

$id = Jetpack::get_option( 'id' );

}

return $id;

}

public function check_api_key() {

$response = $this->protect_call( 'check_key' );

if ( isset( $response['ckval'] ) ) {

return true;

}

if ( isset( $response['error'] ) ) {

if ( $response['error'] == 'Invalid API Key' ) {

$this->api_key_error = __( 'Your API key is invalid', 'jetpack' );

}

if ( $response['error'] == 'API Key Required' ) {

$this->api_key_error = __( 'No API key', 'jetpack' );

}

}

$this->api_key_error = __( 'There was an error contacting Jetpack servers.', 'jetpack' );

return false;

}

/**

function protect_call( $action = 'check_ip', $request = array () ) {

global $wp_version, $wpdb, $current_user;

$api_key = $this->maybe_get_protect_key();

$user_agent = "WordPress/{$wp_version} | Jetpack/" . constant( 'JETPACK__VERSION' );

$request['action'] = $action;

$request['ip'] = jetpack_protect_get_ip();

$request['host'] = $this->get_local_host();

$request['headers'] = json_encode( $this->get_headers() );

$request['jetpack_version'] = constant( 'JETPACK__VERSION' );

$request['wordpress_version'] = strval( $wp_version );

$request['api_key'] = $api_key;

$request['multisite'] = "0";

if ( is_multisite() ) {

$request['multisite'] = get_blog_count();

}

/**

$timeout = apply_filters( 'jetpack_protect_connect_timeout', 30 );

$args = array (

'body' => $request,

'user-agent' => $user_agent,

'httpversion' => '1.0',

'timeout' => absint( $timeout )

);

$response_json = wp_remote_post( $this->get_api_host(), $args );

$this->last_response_raw = $response_json;

$headers = $this->get_headers();

$header_hash = md5( json_encode( $headers ) );

$transient_name = 'jpp_li_' . $header_hash;

$this->delete_transient( $transient_name );

if ( is_array( $response_json ) ) {

$response = json_decode( $response_json['body'], true );

}

if ( isset( $response['blocked_attempts'] ) && $response['blocked_attempts'] ) {

update_site_option( 'jetpack_protect_blocked_attempts', $response['blocked_attempts'] );

}

if ( isset( $response['status'] ) && ! isset( $response['error'] ) ) {

$response['expire'] = time() + $response['seconds_remaining'];

$this->set_transient( $transient_name, $response, $response['seconds_remaining'] );

$this->delete_transient( 'brute_use_math' );

} else { // Fallback to Math Captcha if no response from API host

$this->set_transient( 'brute_use_math', 1, 600 );

$response['status'] = 'ok';

$response['math'] = true;

}

if ( isset( $response['error'] ) ) {

update_site_option( 'jetpack_protect_error', $response['error'] );

} else {

delete_site_option( 'jetpack_protect_error' );

}

return $response;

}

/**

function set_transient( $transient, $value, $expiration ) {

if ( is_multisite() && ! is_main_site() ) {

switch_to_blog( $this->get_main_blog_id() );

$return = set_transient( $transient, $value, $expiration );

restore_current_blog();

return $return;

}

return set_transient( $transient, $value, $expiration );

}

/**

function delete_transient( $transient ) {

if ( is_multisite() && ! is_main_site() ) {

switch_to_blog( $this->get_main_blog_id() );

$return = delete_transient( $transient );

restore_current_blog();

return $return;

}

return delete_transient( $transient );

}

/**

function get_transient( $transient ) {

if ( is_multisite() && ! is_main_site() ) {

switch_to_blog( $this->get_main_blog_id() );

$return = get_transient( $transient );

restore_current_blog();

return $return;

}

return get_transient( $transient );

}

function get_api_host() {

if ( isset( $this->api_endpoint ) ) {

return $this->api_endpoint;

}

//Check to see if we can use SSL

$this->api_endpoint = Jetpack::fix_url_for_bad_hosts( JETPACK_PROTECT__API_HOST );

return $this->api_endpoint;

}

function get_local_host() {

if ( isset( $this->local_host ) ) {

return $this->local_host;

}

$uri = 'http://' . strtolower( $_SERVER['HTTP_HOST'] );

if ( is_multisite() ) {

$uri = network_home_url();

}

$uridata = parse_url( $uri );

$domain = $uridata['host'];

// If we still don't have the site_url, get it

if ( ! $domain ) {

$uri = get_site_url( 1 );

$uridata = parse_url( $uri );

$domain = $uridata['host'];

}

$this->local_host = $domain;

return $this->local_host;

}