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| 1 | <?php |
| 2 | /** |
| 3 | * Class used to define Brute Force Protection. |
| 4 | * |
| 5 | * @package automattic/jetpack-waf |
| 6 | */ |
| 7 | |
| 8 | namespace Automattic\Jetpack\Waf\Brute_Force_Protection; |
| 9 | |
| 10 | use Automattic\Jetpack\Connection\Manager as Connection_Manager; |
| 11 | use Automattic\Jetpack\Constants; |
| 12 | use Automattic\Jetpack\CookieState; |
| 13 | use Automattic\Jetpack\IP\Utils as IP_Utils; |
| 14 | use Automattic\Jetpack\Modules; |
| 15 | use Automattic\Jetpack\Waf\Waf_Compatibility; |
| 16 | use Automattic\Jetpack\Waf\Waf_Constants; |
| 17 | use Automattic\Jetpack\Waf\Waf_Rules_Manager; |
| 18 | use Jetpack_IXR_Client; |
| 19 | use Jetpack_Options; |
| 20 | use WP_Error; |
| 21 | |
| 22 | /** |
| 23 | * Brute Force Protection class. |
| 24 | * |
| 25 | * @phan-constructor-used-for-side-effects |
| 26 | */ |
| 27 | class Brute_Force_Protection { |
| 28 | |
| 29 | /** |
| 30 | * Instance of the class. |
| 31 | * |
| 32 | * @var Brute_Force_Protection |
| 33 | */ |
| 34 | private static $instance = null; |
| 35 | |
| 36 | /** |
| 37 | * API Key. |
| 38 | * |
| 39 | * @var string |
| 40 | */ |
| 41 | public $api_key; |
| 42 | |
| 43 | /** |
| 44 | * API Key error. |
| 45 | * |
| 46 | * @var string |
| 47 | */ |
| 48 | public $api_key_error; |
| 49 | |
| 50 | /** |
| 51 | * IP allow list. |
| 52 | * |
| 53 | * @var array |
| 54 | */ |
| 55 | public $allow_list; |
| 56 | |
| 57 | /** |
| 58 | * IP allow list error. |
| 59 | * |
| 60 | * @var string |
| 61 | */ |
| 62 | public $allow_list_error; |
| 63 | |
| 64 | /** |
| 65 | * IP allow list saved |
| 66 | * |
| 67 | * @todo find out if this is even used. |
| 68 | * |
| 69 | * @var array |
| 70 | */ |
| 71 | public $allow_list_saved; |
| 72 | |
| 73 | /** |
| 74 | * The URI. |
| 75 | * |
| 76 | * @var string |
| 77 | */ |
| 78 | private $local_host; |
| 79 | |
| 80 | /** |
| 81 | * Last request. |
| 82 | * |
| 83 | * @todo find out if this is even used. |
| 84 | * |
| 85 | * @var string |
| 86 | */ |
| 87 | public $last_request; |
| 88 | |
| 89 | /** |
| 90 | * Response fetched from wp_remote_post() |
| 91 | * |
| 92 | * @var array |
| 93 | */ |
| 94 | public $last_response_raw; |
| 95 | |
| 96 | /** |
| 97 | * Last response. |
| 98 | * |
| 99 | * @todo find out if this is used. |
| 100 | * @var array |
| 101 | */ |
| 102 | public $last_response; |
| 103 | |
| 104 | /** |
| 105 | * Block login with math, default is 0. |
| 106 | * |
| 107 | * @var int |
| 108 | */ |
| 109 | private $block_login_with_math = 0; |
| 110 | |
| 111 | /** |
| 112 | * Singleton implementation |
| 113 | * |
| 114 | * @return object |
| 115 | */ |
| 116 | public static function instance() { |
| 117 | if ( ! self::$instance instanceof self ) { |
| 118 | self::$instance = new Brute_Force_Protection(); |
| 119 | } |
| 120 | |
| 121 | return self::$instance; |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Registers actions |
| 126 | */ |
| 127 | private function __construct() { |
| 128 | // Older versions of Jetpack initialize brute force protection directly in the plugin. |
| 129 | // Return early to avoid running it twice. |
| 130 | if ( Waf_Compatibility::is_brute_force_running_in_jetpack() ) { |
| 131 | return; |
| 132 | } |
| 133 | |
| 134 | add_action( 'jetpack_modules_loaded', array( $this, 'modules_loaded' ) ); |
| 135 | add_action( 'login_form', array( $this, 'check_use_math' ), 0 ); |
| 136 | add_filter( 'authenticate', array( $this, 'check_preauth' ), 10, 3 ); |
| 137 | add_filter( 'jetpack_has_login_ability', array( $this, 'has_login_ability' ) ); |
| 138 | add_action( 'wp_login', array( $this, 'log_successful_login' ), 10, 2 ); |
| 139 | add_action( 'wp_login_failed', array( $this, 'log_failed_attempt' ), 10, 2 ); |
| 140 | add_action( 'admin_init', array( $this, 'maybe_update_headers' ) ); |
| 141 | add_action( 'admin_init', array( $this, 'maybe_display_security_warning' ) ); |
| 142 | |
| 143 | // This is a backup in case $pagenow fails for some reason. |
| 144 | add_action( 'login_form', array( $this, 'check_login_ability' ), 1 ); |
| 145 | add_action( 'login_form', array( $this, 'render_login_attempt_token' ), 2 ); |
| 146 | |
| 147 | // Runs a script every day to clean up expired transients so they don't |
| 148 | // clog up our users' databases. |
| 149 | add_action( 'admin_init', array( '\Automattic\Jetpack\Waf\Brute_Force_Protection\Brute_Force_Protection_Transient_Cleanup', 'jp_purge_transients_activation' ) ); |
| 150 | add_action( 'jp_purge_transients_cron', array( '\Automattic\Jetpack\Waf\Brute_Force_Protection\Brute_Force_Protection_Transient_Cleanup', 'jp_purge_transients' ) ); |
| 151 | |
| 152 | // Load math fallback after math page form submission. |
| 153 | if ( isset( $_POST['jetpack_protect_process_math_form'] ) ) { |
| 154 | |
| 155 | new Brute_Force_Protection_Math_Authenticate(); |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | /** |
| 160 | * Run brute force protection. |
| 161 | * |
| 162 | * @return void |
| 163 | */ |
| 164 | public static function initialize() { |
| 165 | // Older versions of Jetpack initialize brute force protection directly in the plugin. |
| 166 | // Return early to avoid running it twice. |
| 167 | if ( Waf_Compatibility::is_brute_force_running_in_jetpack() ) { |
| 168 | return; |
| 169 | } |
| 170 | |
| 171 | $brute_force_protection_is_enabled = self::is_enabled(); |
| 172 | if ( $brute_force_protection_is_enabled && ( new Connection_Manager() )->is_connected() ) { |
| 173 | global $pagenow; |
| 174 | $brute_force_protection = self::instance(); |
| 175 | |
| 176 | // Set-password links stay reachable so new users can finish registering; logins are still checked on `authenticate`. |
| 177 | if ( isset( $pagenow ) && 'wp-login.php' === $pagenow && ! $brute_force_protection->is_valid_password_reset_request() ) { |
| 178 | $brute_force_protection->check_login_ability(); |
| 179 | } |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | /** |
| 184 | * On module activation, try to get an api key |
| 185 | */ |
| 186 | public function on_activation() { |
| 187 | if ( is_multisite() && is_main_site() && get_site_option( 'jetpack_protect_active', 0 ) == 0 ) { // phpcs:ignore Universal.Operators.StrictComparisons.LooseEqual |
| 188 | update_site_option( 'jetpack_protect_active', 1 ); |
| 189 | } |
| 190 | |
| 191 | update_site_option( 'jetpack_protect_activating', 'activating' ); |
| 192 | |
| 193 | // Get BruteProtect's counter number. |
| 194 | $this->protect_call( 'check_key' ); |
| 195 | } |
| 196 | |
| 197 | /** |
| 198 | * On module deactivation, unset protect_active |
| 199 | */ |
| 200 | public function on_deactivation() { |
| 201 | if ( is_multisite() && is_main_site() ) { |
| 202 | update_site_option( 'jetpack_protect_active', 0 ); |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Determines if the brute force protection module is enabled on the site. |
| 208 | * |
| 209 | * @return bool |
| 210 | */ |
| 211 | public static function is_enabled() { |
| 212 | return ( new Modules() )->is_active( 'protect' ); |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * Enables the brute force protection module. |
| 217 | * |
| 218 | * @return bool |
| 219 | */ |
| 220 | public static function enable() { |
| 221 | // Return true if already enabled. |
| 222 | if ( self::is_enabled() ) { |
| 223 | return true; |
| 224 | } |
| 225 | return ( new Modules() )->activate( 'protect', false, false ); |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * Disables the brute force protection module. |
| 230 | * |
| 231 | * @return bool |
| 232 | */ |
| 233 | public static function disable() { |
| 234 | // Return true if already disabled. |
| 235 | if ( ! self::is_enabled() ) { |
| 236 | return true; |
| 237 | } |
| 238 | return ( new Modules() )->deactivate( 'protect' ); |
| 239 | } |
| 240 | |
| 241 | /** |
| 242 | * Get the protect key, |
| 243 | */ |
| 244 | public function maybe_get_protect_key() { |
| 245 | if ( get_site_option( 'jetpack_protect_activating', false ) && ! get_site_option( 'jetpack_protect_key', false ) ) { |
| 246 | $key = $this->get_protect_key(); |
| 247 | |
| 248 | if ( ! empty( $key ) ) { |
| 249 | delete_site_option( 'jetpack_protect_activating' ); |
| 250 | } |
| 251 | |
| 252 | return $key; |
| 253 | } |
| 254 | |
| 255 | return get_site_option( 'jetpack_protect_key' ); |
| 256 | } |
| 257 | |
| 258 | /** |
| 259 | * Sends a "check_key" API call once a day. This call allows us to track IP-related |
| 260 | * headers for this server via the Protect API, in order to better identify the source |
| 261 | * IP for login attempts |
| 262 | * |
| 263 | * @param bool $force - if we're forcing the request. |
| 264 | */ |
| 265 | public function maybe_update_headers( $force = false ) { |
| 266 | $updated_recently = $this->get_transient( 'jpp_headers_updated_recently' ); |
| 267 | |
| 268 | if ( ! $force ) { |
| 269 | if ( isset( $_GET['protect_update_headers'] ) ) { |
| 270 | $force = true; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | // check that current user is admin so we prevent a lower level user from adding |
| 275 | // a trusted header, allowing them to brute force an admin account. |
| 276 | if ( ( $updated_recently && ! $force ) || ! current_user_can( 'update_plugins' ) ) { |
| 277 | return; |
| 278 | } |
| 279 | |
| 280 | $response = self::protect_call( 'check_key' ); |
| 281 | $this->set_transient( 'jpp_headers_updated_recently', 1, DAY_IN_SECONDS ); |
| 282 | |
| 283 | if ( isset( $response['msg'] ) && $response['msg'] ) { |
| 284 | update_site_option( 'trusted_ip_header', json_decode( $response['msg'] ) ); |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | /** |
| 289 | * Handle displaying a security warning. |
| 290 | */ |
| 291 | public function maybe_display_security_warning() { |
| 292 | if ( is_multisite() && current_user_can( 'manage_network' ) ) { |
| 293 | if ( ! function_exists( 'is_plugin_active_for_network' ) ) { |
| 294 | require_once ABSPATH . '/wp-admin/includes/plugin.php'; |
| 295 | } |
| 296 | |
| 297 | // This warning is only relevant if either Jetpack or Jetpack Protect is active. |
| 298 | if ( defined( 'JETPACK__PLUGIN_FILE' ) ) { |
| 299 | $plugin_root_file = JETPACK__PLUGIN_FILE; |
| 300 | } elseif ( defined( 'JETPACK_PROTECT_ROOT_FILE' ) ) { |
| 301 | $plugin_root_file = JETPACK_PROTECT_ROOT_FILE; |
| 302 | } else { |
| 303 | return; |
| 304 | } |
| 305 | |
| 306 | if ( ! is_plugin_active_for_network( plugin_basename( $plugin_root_file ) ) ) { |
| 307 | add_action( 'load-index.php', array( $this, 'prepare_jetpack_protect_multisite_notice' ) ); |
| 308 | add_action( 'wp_ajax_jetpack-protect-dismiss-multisite-banner', array( $this, 'ajax_dismiss_handler' ) ); |
| 309 | } |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | /** |
| 314 | * Handles preparing the multisite notice. |
| 315 | */ |
| 316 | public function prepare_jetpack_protect_multisite_notice() { |
| 317 | $dismissed = get_site_option( 'jetpack_dismissed_protect_multisite_banner' ); |
| 318 | if ( $dismissed ) { |
| 319 | return; |
| 320 | } |
| 321 | |
| 322 | add_action( 'admin_notices', array( $this, 'admin_jetpack_manage_notice' ) ); |
| 323 | } |
| 324 | |
| 325 | /** |
| 326 | * Handle dismissing the multisite banner. |
| 327 | */ |
| 328 | public function ajax_dismiss_handler() { |
| 329 | check_ajax_referer( 'jetpack_protect_multisite_banner_opt_out' ); |
| 330 | |
| 331 | if ( ! current_user_can( 'manage_network' ) ) { |
| 332 | // @phan-suppress-next-line PhanTypeMismatchArgumentProbablyReal -- It takes null, but its phpdoc only says int. |
| 333 | wp_send_json_error( new WP_Error( 'insufficient_permissions' ), null, JSON_UNESCAPED_SLASHES ); |
| 334 | } |
| 335 | |
| 336 | update_site_option( 'jetpack_dismissed_protect_multisite_banner', true ); |
| 337 | |
| 338 | // @phan-suppress-next-line PhanTypeMismatchArgumentProbablyReal -- It takes null, but its phpdoc only says int. |
| 339 | wp_send_json_success( null, null, JSON_UNESCAPED_SLASHES ); |
| 340 | } |
| 341 | |
| 342 | /** |
| 343 | * Displays a warning about Brute Force Protection's network activation requirement. |
| 344 | * Attaches some custom JS to Core's `is-dismissible` UI to save the dismissed state. |
| 345 | */ |
| 346 | public function admin_jetpack_manage_notice() { |
| 347 | ?> |
| 348 | <div class="jetpack-protect-warning notice notice-warning is-dismissible" data-dismiss-nonce="<?php echo esc_attr( wp_create_nonce( 'jetpack_protect_multisite_banner_opt_out' ) ); ?>"> |
| 349 | <h2><?php esc_html_e( 'Brute Force Protection cannot keep your site secure', 'jetpack-waf' ); ?></h2> |
| 350 | |
| 351 | <p> |
| 352 | <?php |
| 353 | printf( |
| 354 | /* Translators: placeholder is a plugin name (Jetpack Protect or Jetpack). */ |
| 355 | esc_html__( 'Thanks for activating the Brute Force Protection feature! To start protecting your whole WordPress Multisite Network, please network activate the %1$s plugin. Due to the way logins are handled on WordPress Multisite Networks, %1$s must be network activated in order for the Brute Force Protection feature to work properly.', 'jetpack-waf' ), |
| 356 | defined( 'JETPACK_PROTECT_NAME' ) ? esc_html( JETPACK_PROTECT_NAME ) : 'Jetpack' |
| 357 | ); |
| 358 | ?> |
| 359 | </p> |
| 360 | |
| 361 | <p> |
| 362 | <a class="button-primary" href="<?php echo esc_url( network_admin_url( 'plugins.php' ) ); ?>"> |
| 363 | <?php esc_html_e( 'View Network Admin', 'jetpack-waf' ); ?> |
| 364 | </a> |
| 365 | <a class="button" href="<?php echo esc_url( __( 'https://jetpack.com/support/multisite-protect', 'jetpack-waf' ) ); ?>" target="_blank"> |
| 366 | <?php esc_html_e( 'Learn More', 'jetpack-waf' ); ?> |
| 367 | </a> |
| 368 | </p> |
| 369 | </div> |
| 370 | <script> |
| 371 | jQuery( function( $ ) { |
| 372 | $( '.jetpack-protect-warning' ).on( 'click', 'button.notice-dismiss', function( event ) { |
| 373 | event.preventDefault(); |
| 374 | |
| 375 | wp.ajax.post( |
| 376 | 'jetpack-protect-dismiss-multisite-banner', |
| 377 | { |
| 378 | _wpnonce: $( event.delegateTarget ).data( 'dismiss-nonce' ), |
| 379 | } |
| 380 | ).fail( function( error ) { |
| 381 | <?php |
| 382 | // A failure here is really strange, and there's not really anything a site owner can do to fix one. |
| 383 | // Just log the error for now to help debugging. |
| 384 | ?> |
| 385 | |
| 386 | if ( 'function' === typeof error.done && '-1' === error.responseText ) { |
| 387 | console.error( 'Notice dismissal failed: check_ajax_referer' ); |
| 388 | } else { |
| 389 | console.error( 'Notice dismissal failed: ' + JSON.stringify( error ) ); |
| 390 | } |
| 391 | } ) |
| 392 | } ); |
| 393 | } ); |
| 394 | </script> |
| 395 | <?php |
| 396 | } |
| 397 | |
| 398 | /** |
| 399 | * Gets all plugins currently active in values, regardless of whether they're |
| 400 | * traditionally activated or network activated. |
| 401 | * |
| 402 | * Forked from Jetpack::get_active_plugins from the Jetpack plugin. |
| 403 | * |
| 404 | * @return string[] |
| 405 | */ |
| 406 | public static function get_active_plugins() { |
| 407 | $active_plugins = (array) get_option( 'active_plugins', array() ); |
| 408 | |
| 409 | if ( is_multisite() ) { |
| 410 | // Due to legacy code, active_sitewide_plugins stores them in the keys, |
| 411 | // whereas active_plugins stores them in the values. |
| 412 | $network_plugins = array_keys( get_site_option( 'active_sitewide_plugins', array() ) ); |
| 413 | if ( $network_plugins ) { |
| 414 | $active_plugins = array_merge( $active_plugins, $network_plugins ); |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | sort( $active_plugins ); |
| 419 | |
| 420 | return array_unique( $active_plugins ); |
| 421 | } |
| 422 | |
| 423 | /** |
| 424 | * Deactivate a plugin. |
| 425 | * |
| 426 | * @param string $probable_file Expected plugin file. |
| 427 | * @param string $probable_title Expected plugin title. |
| 428 | * |
| 429 | * @return void |
| 430 | */ |
| 431 | public static function deactivate_plugin( $probable_file, $probable_title ) { |
| 432 | include_once ABSPATH . 'wp-admin/includes/plugin.php'; |
| 433 | if ( is_plugin_active( $probable_file ) ) { |
| 434 | deactivate_plugins( $probable_file ); |
| 435 | } else { |
| 436 | // If the plugin is not in the usual place, try looking through all active plugins. |
| 437 | $active_plugins = get_option( 'active_plugins' ); |
| 438 | foreach ( $active_plugins as $plugin ) { |
| 439 | $data = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin ); |
| 440 | if ( $data['Name'] === $probable_title ) { |
| 441 | deactivate_plugins( $plugin ); |
| 442 | } |
| 443 | } |
| 444 | } |
| 445 | } |
| 446 | |
| 447 | /** |
| 448 | * Request an api key from wordpress.com |
| 449 | * |
| 450 | * @return bool | string |
| 451 | */ |
| 452 | public function get_protect_key() { |
| 453 | |
| 454 | $protect_blog_id = self::get_main_blog_jetpack_id(); |
| 455 | |
| 456 | // If we can't find the the blog id, that means we are on multisite, and the main site never connected |
| 457 | // the protect api key is linked to the main blog id - instruct the user to connect their main blog. |
| 458 | if ( ! $protect_blog_id ) { |
| 459 | $this->api_key_error = __( 'Your main blog is not connected to WordPress.com. Please connect to get an API key.', 'jetpack-waf' ); |
| 460 | |
| 461 | return false; |
| 462 | } |
| 463 | |
| 464 | $request = array( |
| 465 | 'jetpack_blog_id' => $protect_blog_id, |
| 466 | 'bruteprotect_api_key' => get_site_option( 'bruteprotect_api_key' ), |
| 467 | 'multisite' => '0', |
| 468 | ); |
| 469 | |
| 470 | // Send the number of blogs on the network if we are on multisite. |
| 471 | if ( is_multisite() ) { |
| 472 | $request['multisite'] = get_blog_count(); |
| 473 | if ( ! $request['multisite'] ) { |
| 474 | global $wpdb; |
| 475 | $request['multisite'] = $wpdb->get_var( "SELECT COUNT(blog_id) as c FROM $wpdb->blogs WHERE spam = '0' AND deleted = '0' and archived = '0'" ); // phpcs:ignore WordPress.DB.DirectDatabaseQuery |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | // Request the key. |
| 480 | $xml = new Jetpack_IXR_Client(); |
| 481 | $xml->query( 'jetpack.protect.requestKey', $request ); |
| 482 | |
| 483 | // Hmm, can't talk to wordpress.com. |
| 484 | if ( $xml->isError() ) { |
| 485 | $code = $xml->getErrorCode(); |
| 486 | $message = $xml->getErrorMessage(); |
| 487 | // Translators: The xml error code, and the xml error message. |
| 488 | $this->api_key_error = sprintf( __( 'Error connecting to WordPress.com. Code: %1$s, %2$s', 'jetpack-waf' ), $code, $message ); |
| 489 | |
| 490 | return false; |
| 491 | } |
| 492 | |
| 493 | $response = $xml->getResponse(); |
| 494 | |
| 495 | // Hmm, can't talk to the protect servers ( api.bruteprotect.com ). |
| 496 | if ( ! isset( $response['data'] ) ) { |
| 497 | $this->api_key_error = __( 'No reply from Jetpack servers', 'jetpack-waf' ); |
| 498 | |
| 499 | return false; |
| 500 | } |
| 501 | |
| 502 | // There was an issue generating the key. |
| 503 | if ( empty( $response['success'] ) ) { |
| 504 | $this->api_key_error = $response['data']; |
| 505 | |
| 506 | return false; |
| 507 | } |
| 508 | |
| 509 | // Key generation successful! |
| 510 | $active_plugins = self::get_active_plugins(); |
| 511 | |
| 512 | // We only want to deactivate BruteProtect if we successfully get a key. |
| 513 | if ( in_array( 'bruteprotect/bruteprotect.php', $active_plugins, true ) ) { |
| 514 | self::deactivate_plugin( 'bruteprotect/bruteprotect.php', 'BruteProtect' ); |
| 515 | } |
| 516 | |
| 517 | $key = $response['data']; |
| 518 | update_site_option( 'jetpack_protect_key', $key ); |
| 519 | |
| 520 | return $key; |
| 521 | } |
| 522 | |
| 523 | /** |
| 524 | * Called via WP action wp_login_failed to log failed attempt with the api |
| 525 | * |
| 526 | * Fires custom, plugable action jpp_log_failed_attempt with the IP |
| 527 | * |
| 528 | * @param string|null $username - The username or email address attempting to log in. |
| 529 | * @param \WP_Error|string|null $error - A WP_Error object or error message with the authentication failure details. |
| 530 | * |
| 531 | * @return void |
| 532 | */ |
| 533 | public function log_failed_attempt( $username, $error = null ) { |
| 534 | $username ??= ''; |
| 535 | |
| 536 | // Skip if Account protection password validation error. |
| 537 | if ( is_object( $error ) && isset( $error->errors['password_detection_validation_error'] ) ) { |
| 538 | return; |
| 539 | } |
| 540 | |
| 541 | /** |
| 542 | * Fires before every failed login attempt. |
| 543 | * |
| 544 | * @module protect |
| 545 | * |
| 546 | * @since 3.4.0 |
| 547 | * |
| 548 | * @param array Information about failed login attempt |
| 549 | * [ |
| 550 | * 'login' => (string) Username or email used in failed login attempt |
| 551 | * ] |
| 552 | */ |
| 553 | do_action( 'jpp_log_failed_attempt', array( 'login' => $username ) ); |
| 554 | |
| 555 | if ( isset( $_COOKIE['jpp_math_pass'] ) ) { |
| 556 | |
| 557 | $transient = $this->get_transient( 'jpp_math_pass_' . sanitize_key( $_COOKIE['jpp_math_pass'] ) ); |
| 558 | if ( is_int( $transient ) ) { |
| 559 | --$transient; |
| 560 | } |
| 561 | |
| 562 | if ( ! is_int( $transient ) || $transient < 1 ) { |
| 563 | $this->delete_transient( 'jpp_math_pass_' . sanitize_key( $_COOKIE['jpp_math_pass'] ) ); |
| 564 | // This is a cop out for the tests on some PHP versions |
| 565 | if ( ! headers_sent() ) { |
| 566 | setcookie( 'jpp_math_pass', '0', time() - DAY_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN, false, true ); |
| 567 | } |
| 568 | } else { |
| 569 | $this->set_transient( 'jpp_math_pass_' . sanitize_key( $_COOKIE['jpp_math_pass'] ), $transient, DAY_IN_SECONDS ); |
| 570 | } |
| 571 | } |
| 572 | $this->protect_call( 'failed_attempt' ); |
| 573 | } |
| 574 | |
| 575 | /** |
| 576 | * Set up the Brute Force Protection configuration page |
| 577 | */ |
| 578 | public function modules_loaded() { |
| 579 | add_filter( 'jetpack_module_configurable_protect', '__return_true' ); |
| 580 | } |
| 581 | |
| 582 | /** |
| 583 | * Logs a successful login back to our servers, this allows us to make sure we're not blocking |
| 584 | * a busy IP that has a lot of good logins along with some forgotten passwords. Also saves current user's ip |
| 585 | * to the ip address allow list |
| 586 | * |
| 587 | * @param string $user_login - the user logging in. |
| 588 | * @param \WP_User $user - the user. |
| 589 | */ |
| 590 | public function log_successful_login( $user_login, $user = null ) { |
| 591 | if ( ! $user ) { // For do_action( 'wp_login' ) calls that lacked passing the 2nd arg. |
| 592 | $user = get_user_by( 'login', $user_login ); |
| 593 | } |
| 594 | |
| 595 | $roles = $user instanceof \WP_User ? $user->roles : array(); |
| 596 | $this->protect_call( 'successful_login', array( 'roles' => $roles ) ); |
| 597 | } |
| 598 | |
| 599 | /** |
| 600 | * Checks for loginability BEFORE authentication so that bots don't get to go around the log in form. |
| 601 | * |
| 602 | * If we are using our math fallback, authenticate via math-fallback.php |
| 603 | * |
| 604 | * @param mixed $user - the current authentication result. |
| 605 | * @param string $username - the username. |
| 606 | * @param string $password - the password. |
| 607 | * |
| 608 | * @return mixed $user |
| 609 | */ |
| 610 | public function check_preauth( $user = 'Not Used By Protect', $username = 'Not Used By Protect', $password = 'Not Used By Protect' ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable |
| 611 | if ( ! $this->check_login_ability( true ) ) { |
| 612 | $this->block_with_math(); |
| 613 | } |
| 614 | |
| 615 | if ( $this->math_required() && isset( $_POST['log'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing -- POST request just determines if we use math authentication. |
| 616 | |
| 617 | Brute_Force_Protection_Math_Authenticate::math_authenticate(); |
| 618 | } |
| 619 | |
| 620 | return $user; |
| 621 | } |
| 622 | |
| 623 | /** |
| 624 | * Add a token to a login form that Protect is not asking to solve math for. |
| 625 | */ |
| 626 | public function render_login_attempt_token() { |
| 627 | if ( $this->math_required() ) { |
| 628 | return; |
| 629 | } |
| 630 | |
| 631 | ( new Brute_Force_Protection_Login_Attempt_Token( $this ) )->render_field(); |
| 632 | } |
| 633 | |
| 634 | /** |
| 635 | * Whether this request must pass the math check, after a soft block or an unreachable Protect API. |
| 636 | * |
| 637 | * @return bool |
| 638 | */ |
| 639 | private function math_required() { |
| 640 | return 1 === $this->block_login_with_math || 1 === (int) $this->get_transient( 'brute_use_math' ); |
| 641 | } |
| 642 | |
| 643 | /** |
| 644 | * Get all IP headers so that we can process on our server... |
| 645 | * |
| 646 | * @return array |
| 647 | */ |
| 648 | public function get_headers() { |
| 649 | $output = array(); |
| 650 | $ip_related_headers = array( |
| 651 | 'GD_PHP_HANDLER', |
| 652 | 'HTTP_AKAMAI_ORIGIN_HOP', |
| 653 | 'HTTP_CF_CONNECTING_IP', |
| 654 | 'HTTP_CLIENT_IP', |
| 655 | 'HTTP_FASTLY_CLIENT_IP', |
| 656 | 'HTTP_FORWARDED', |
| 657 | 'HTTP_FORWARDED_FOR', |
| 658 | 'HTTP_INCAP_CLIENT_IP', |
| 659 | 'HTTP_TRUE_CLIENT_IP', |
| 660 | 'HTTP_X_CLIENTIP', |
| 661 | 'HTTP_X_CLUSTER_CLIENT_IP', |
| 662 | 'HTTP_X_FORWARDED', |
| 663 | 'HTTP_X_FORWARDED_FOR', |
| 664 | 'HTTP_X_IP_TRAIL', |
| 665 | 'HTTP_X_REAL_IP', |
| 666 | 'HTTP_X_VARNISH', |
| 667 | 'REMOTE_ADDR', |
| 668 | ); |
| 669 | |
| 670 | foreach ( $ip_related_headers as $header ) { |
| 671 | if ( ! empty( $_SERVER[ $header ] ) ) { |
| 672 | $output[ $header ] = wp_unslash( $_SERVER[ $header ] ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized |
| 673 | } |
| 674 | } |
| 675 | |
| 676 | return $output; |
| 677 | } |
| 678 | |
| 679 | /** |
| 680 | * Whether or not the IP allow list is enabled. |
| 681 | * |
| 682 | * @return bool |
| 683 | */ |
| 684 | public static function ip_allow_list_enabled() { |
| 685 | return get_option( Waf_Rules_Manager::IP_ALLOW_LIST_ENABLED_OPTION_NAME, true ); |
| 686 | } |
| 687 | |
| 688 | /** |
| 689 | * Checks if the IP address is in the allow list. |
| 690 | * |
| 691 | * @deprecated 0.11.0 Use ip_is_allowed() |
| 692 | * |
| 693 | * @param string $ip - the IP address. |
| 694 | */ |
| 695 | public static function ip_is_whitelisted( $ip ) { |
| 696 | _deprecated_function( __METHOD__, 'waf-0.11.0', __CLASS__ . '::ip_is_allowed' ); |
| 697 | return self::ip_is_allowed( $ip ); |
| 698 | } |
| 699 | |
| 700 | /** |
| 701 | * Checks if the IP address is in the allow list. |
| 702 | * |
| 703 | * @param string $ip - the IP address. |
| 704 | * |
| 705 | * @return bool |
| 706 | */ |
| 707 | public function ip_is_allowed( $ip ) { |
| 708 | // If we found an exact match in wp-config. |
| 709 | if ( defined( 'JETPACK_IP_ADDRESS_OK' ) && JETPACK_IP_ADDRESS_OK === $ip ) { |
| 710 | return true; |
| 711 | } |
| 712 | |
| 713 | // Allow list must be enabled. |
| 714 | if ( ! $this->ip_allow_list_enabled() ) { |
| 715 | return false; |
| 716 | } |
| 717 | |
| 718 | $allow_list = Brute_Force_Protection_Shared_Functions::get_local_allow_list(); |
| 719 | |
| 720 | if ( is_multisite() ) { |
| 721 | $allow_list = array_merge( $allow_list, get_site_option( 'jetpack_protect_global_whitelist', array() ) ); |
| 722 | } |
| 723 | |
| 724 | if ( ! empty( $allow_list ) ) : |
| 725 | foreach ( $allow_list as $item ) : |
| 726 | // If the IPs are an exact match. |
| 727 | if ( ! $item->range && isset( $item->ip_address ) && $item->ip_address === $ip ) { |
| 728 | return true; |
| 729 | } |
| 730 | |
| 731 | if ( $item->range && isset( $item->range_low ) && isset( $item->range_high ) ) { |
| 732 | if ( IP_Utils::ip_address_is_in_range( $ip, $item->range_low, $item->range_high ) ) { |
| 733 | return true; |
| 734 | } |
| 735 | } |
| 736 | endforeach; |
| 737 | endif; |
| 738 | |
| 739 | return false; |
| 740 | } |
| 741 | |
| 742 | /** |
| 743 | * Checks the status for a given IP. API results are cached as transients |
| 744 | * |
| 745 | * @param bool $preauth - Whether or not we are checking prior to authorization. |
| 746 | * |
| 747 | * @return bool Either returns true, fires $this->kill_login, or includes a math fallback and returns false |
| 748 | */ |
| 749 | public function check_login_ability( $preauth = false ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable |
| 750 | |
| 751 | /** |
| 752 | * JETPACK_ALWAYS_PROTECT_LOGIN will always disable the login page, and use a page provided by Jetpack. |
| 753 | */ |
| 754 | if ( Constants::is_true( 'JETPACK_ALWAYS_PROTECT_LOGIN' ) ) { |
| 755 | $this->kill_login(); |
| 756 | } |
| 757 | |
| 758 | if ( $this->is_current_ip_allowed() ) { |
| 759 | return true; |
| 760 | } |
| 761 | |
| 762 | $status = $this->get_cached_status(); |
| 763 | |
| 764 | if ( empty( $status ) ) { |
| 765 | // If we've reached this point, this means that the IP isn't cached. |
| 766 | // Now we check with the Protect API to see if we should allow login. |
| 767 | $response = $this->protect_call( $action = 'check_ip' ); // phpcs:ignore Squiz.PHP.DisallowMultipleAssignments.Found |
| 768 | |
| 769 | if ( isset( $response['math'] ) && ! function_exists( 'brute_math_authenticate' ) ) { |
| 770 | new Brute_Force_Protection_Math_Authenticate(); |
| 771 | |
| 772 | return false; |
| 773 | } |
| 774 | |
| 775 | $status = $response['status']; |
| 776 | } |
| 777 | |
| 778 | if ( 'blocked' === $status ) { |
| 779 | $this->block_with_math(); |
| 780 | } |
| 781 | |
| 782 | if ( 'blocked-hard' === $status ) { |
| 783 | $this->kill_login(); |
| 784 | } |
| 785 | |
| 786 | return true; |
| 787 | } |
| 788 | |
| 789 | /** |
| 790 | * Check if the user's IP is in the allow list. |
| 791 | * |
| 792 | * @deprecated 0.11.0 Use is_current_ip_allowed() |
| 793 | */ |
| 794 | public static function is_current_ip_whitelisted() { |
| 795 | _deprecated_function( __METHOD__, 'waf-0.11.0', __CLASS__ . '::is_current_ip_allowed' ); |
| 796 | return self::is_current_ip_allowed(); |
| 797 | } |
| 798 | |
| 799 | /** |
| 800 | * Check if the user's IP is in the allow list. |
| 801 | */ |
| 802 | public function is_current_ip_allowed() { |
| 803 | $ip = IP_Utils::get_ip(); |
| 804 | |
| 805 | // Server is misconfigured and we can't get an IP. |
| 806 | if ( ! $ip ) { |
| 807 | self::disable(); |
| 808 | ob_start(); |
| 809 | ( new CookieState() )->state( 'message', 'protect_misconfigured_ip' ); |
| 810 | ob_end_clean(); |
| 811 | return true; |
| 812 | } |
| 813 | |
| 814 | /** |
| 815 | * Short-circuit check_login_ability. |
| 816 | * |
| 817 | * If there is an alternate way to validate the current IP such as |
| 818 | * a hard-coded list of IP addresses, we can short-circuit the rest |
| 819 | * of the login ability checks and return true here. |
| 820 | * |
| 821 | * @module protect |
| 822 | * |
| 823 | * @since 4.4.0 |
| 824 | * |
| 825 | * @param bool false Should we allow all logins for the current ip? Default: false |
| 826 | */ |
| 827 | if ( apply_filters( 'jpp_allow_login', false, $ip ) ) { |
| 828 | return true; |
| 829 | } |
| 830 | |
| 831 | if ( IP_Utils::ip_is_private( $ip ) ) { |
| 832 | return true; |
| 833 | } |
| 834 | |
| 835 | if ( $this->ip_is_allowed( $ip ) ) { |
| 836 | return true; |
| 837 | } |
| 838 | } |
| 839 | |
| 840 | /** |
| 841 | * Check if someone is able to login based on IP. |
| 842 | */ |
| 843 | public function has_login_ability() { |
| 844 | if ( $this->is_current_ip_allowed() ) { |
| 845 | return true; |
| 846 | } |
| 847 | $status = $this->get_cached_status(); |
| 848 | if ( empty( $status ) || 'ok' === $status ) { |
| 849 | return true; |
| 850 | } |
| 851 | return false; |
| 852 | } |
| 853 | |
| 854 | /** |
| 855 | * Check the status of the cached transient. |
| 856 | */ |
| 857 | public function get_cached_status() { |
| 858 | $transient_name = $this->get_transient_name(); |
| 859 | $value = $this->get_transient( $transient_name ); |
| 860 | if ( isset( $value['status'] ) ) { |
| 861 | return $value['status']; |
| 862 | } |
| 863 | return ''; |
| 864 | } |
| 865 | |
| 866 | /** |
| 867 | * Check if we need to block with a math question to continue logging in. |
| 868 | */ |
| 869 | public function block_with_math() { |
| 870 | /** |
| 871 | * By default, Protect will allow a user who has been blocked for too |
| 872 | * many failed logins to start answering math questions to continue logging in |
| 873 | * |
| 874 | * For added security, you can disable this. |
| 875 | * |
| 876 | * @module protect |
| 877 | * |
| 878 | * @since 3.6.0 |
| 879 | * |
| 880 | * @param bool Whether to allow math for blocked users or not. |
| 881 | */ |
| 882 | |
| 883 | $this->block_login_with_math = 1; |
| 884 | /** |
| 885 | * Allow Math fallback for blocked IPs. |
| 886 | * |
| 887 | * @module protect |
| 888 | * |
| 889 | * @since 3.6.0 |
| 890 | * |
| 891 | * @param bool true Should we fallback to the Math questions when an IP is blocked. Default to true. |
| 892 | */ |
| 893 | $allow_math_fallback_on_fail = apply_filters( 'jpp_use_captcha_when_blocked', true ); |
| 894 | if ( ! $allow_math_fallback_on_fail ) { |
| 895 | $this->kill_login(); |
| 896 | } |
| 897 | |
| 898 | new Brute_Force_Protection_Math_Authenticate(); |
| 899 | |
| 900 | return false; |
| 901 | } |
| 902 | |
| 903 | /** |
| 904 | * Whether this is a wp-login.php set-password request carrying a valid reset key. |
| 905 | * |
| 906 | * Core moves the key from the link into a cookie on the first request, so both are checked. |
| 907 | * |
| 908 | * @since 0.29.3 |
| 909 | * |
| 910 | * @return bool |
| 911 | */ |
| 912 | public function is_valid_password_reset_request() { |
| 913 | // phpcs:disable WordPress.Security.NonceVerification -- Read-only; core validates the reset key itself. |
| 914 | $action = isset( $_REQUEST['action'] ) && is_string( $_REQUEST['action'] ) ? sanitize_text_field( wp_unslash( $_REQUEST['action'] ) ) : ''; |
| 915 | if ( 'rp' !== $action && 'resetpass' !== $action ) { |
| 916 | return false; |
| 917 | } |
| 918 | |
| 919 | $rp_cookie = defined( 'COOKIEHASH' ) ? 'wp-resetpass-' . COOKIEHASH : ''; |
| 920 | if ( isset( $_GET['key'] ) && isset( $_GET['login'] ) && is_string( $_GET['key'] ) && is_string( $_GET['login'] ) ) { |
| 921 | $key = wp_unslash( $_GET['key'] ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Passed to check_password_reset_key(). |
| 922 | $login = wp_unslash( $_GET['login'] ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Passed to check_password_reset_key(). |
| 923 | } elseif ( $rp_cookie && isset( $_COOKIE[ $rp_cookie ] ) && is_string( $_COOKIE[ $rp_cookie ] ) && 0 < strpos( $_COOKIE[ $rp_cookie ], ':' ) ) { // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Only checked for a separator. |
| 924 | list( $login, $key ) = explode( ':', wp_unslash( $_COOKIE[ $rp_cookie ] ), 2 ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Passed to check_password_reset_key(). |
| 925 | } else { |
| 926 | return false; |
| 927 | } |
| 928 | // phpcs:enable WordPress.Security.NonceVerification |
| 929 | |
| 930 | return ! is_wp_error( check_password_reset_key( $key, $login ) ); |
| 931 | } |
| 932 | |
| 933 | /** |
| 934 | * Kill a login attempt |
| 935 | */ |
| 936 | public function kill_login() { |
| 937 | if ( |
| 938 | isset( $_GET['action'] ) && isset( $_GET['_wpnonce'] ) && |
| 939 | 'logout' === $_GET['action'] && |
| 940 | wp_verify_nonce( $_GET['_wpnonce'], 'log-out' ) && // phpcs:ignore WordPress.Security.ValidatedSanitizedInput |
| 941 | wp_get_current_user() |
| 942 | |
| 943 | ) { |
| 944 | // Allow users to logout. |
| 945 | return; |
| 946 | } |
| 947 | |
| 948 | $ip = IP_Utils::get_ip(); |
| 949 | /** |
| 950 | * Fires before every killed login. |
| 951 | * |
| 952 | * @module protect |
| 953 | * |
| 954 | * @since 3.4.0 |
| 955 | * |
| 956 | * @param string $ip IP flagged by Protect. |
| 957 | */ |
| 958 | do_action( 'jpp_kill_login', $ip ); |
| 959 | |
| 960 | if ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) { |
| 961 | // translators: variable is the IP address that was flagged. |
| 962 | $die_string = sprintf( __( 'Your IP (%1$s) has been flagged for potential security violations.', 'jetpack-waf' ), str_replace( 'http://', '', esc_url( 'http://' . $ip ) ) ); |
| 963 | wp_die( |
| 964 | $die_string, |
| 965 | esc_html__( 'Login Blocked by Jetpack', 'jetpack-waf' ), |
| 966 | array( 'response' => 403 ) |
| 967 | ); |
| 968 | } |
| 969 | |
| 970 | $blocked_login_page = Brute_Force_Protection_Blocked_Login_Page::instance( $ip ); |
| 971 | |
| 972 | if ( $blocked_login_page->is_blocked_user_valid() ) { |
| 973 | return; |
| 974 | } |
| 975 | |
| 976 | $blocked_login_page->render_and_die(); |
| 977 | } |
| 978 | |
| 979 | /** |
| 980 | * Checks if the protect API call has failed, and if so initiates the math captcha fallback. |
| 981 | */ |
| 982 | public function check_use_math() { |
| 983 | $use_math = $this->get_transient( 'brute_use_math' ); |
| 984 | if ( $use_math ) { |
| 985 | new Brute_Force_Protection_Math_Authenticate(); |
| 986 | } |
| 987 | } |
| 988 | |
| 989 | /** |
| 990 | * If we're in a multisite network, return the blog ID of the primary blog |
| 991 | * |
| 992 | * @return int |
| 993 | */ |
| 994 | public function get_main_blog_id() { |
| 995 | if ( ! is_multisite() ) { |
| 996 | return false; |
| 997 | } |
| 998 | |
| 999 | global $current_site; |
| 1000 | $primary_blog_id = $current_site->blog_id; |
| 1001 | |
| 1002 | return $primary_blog_id; |
| 1003 | } |
| 1004 | |
| 1005 | /** |
| 1006 | * Get jetpack blog id, or the jetpack blog id of the main blog in the main network |
| 1007 | * |
| 1008 | * @return int |
| 1009 | */ |
| 1010 | public function get_main_blog_jetpack_id() { |
| 1011 | return $this->on_main_site( |
| 1012 | static function () { |
| 1013 | return Jetpack_Options::get_option( 'id' ); |
| 1014 | } |
| 1015 | ); |
| 1016 | } |
| 1017 | |
| 1018 | /** |
| 1019 | * Checks the API key. |
| 1020 | */ |
| 1021 | public function check_api_key() { |
| 1022 | $response = $this->protect_call( 'check_key' ); |
| 1023 | |
| 1024 | if ( isset( $response['ckval'] ) ) { |
| 1025 | return true; |
| 1026 | } |
| 1027 | |
| 1028 | if ( isset( $response['error'] ) ) { |
| 1029 | |
| 1030 | if ( 'Invalid API Key' === $response['error'] ) { |
| 1031 | $this->api_key_error = __( 'Your API key is invalid', 'jetpack-waf' ); |
| 1032 | } |
| 1033 | |
| 1034 | if ( 'API Key Required' === $response['error'] ) { |
| 1035 | $this->api_key_error = __( 'No API key', 'jetpack-waf' ); |
| 1036 | } |
| 1037 | } |
| 1038 | |
| 1039 | $this->api_key_error = __( 'There was an error contacting Jetpack servers.', 'jetpack-waf' ); |
| 1040 | |
| 1041 | return false; |
| 1042 | } |
| 1043 | |
| 1044 | /** |
| 1045 | * Calls over to the api using wp_remote_post |
| 1046 | * |
| 1047 | * @param string $action - 'check_ip', 'check_key', or 'failed_attempt'. |
| 1048 | * @param array $request - Any custom data to post to the api. |
| 1049 | * |
| 1050 | * @return array |
| 1051 | */ |
| 1052 | public function protect_call( $action = 'check_ip', $request = array() ) { |
| 1053 | global $wp_version; |
| 1054 | |
| 1055 | $api_key = $this->maybe_get_protect_key(); |
| 1056 | |
| 1057 | $user_agent = "WordPress/{$wp_version}"; |
| 1058 | |
| 1059 | $request['action'] = $action; |
| 1060 | $request['ip'] = IP_Utils::get_ip(); |
| 1061 | $request['host'] = $this->get_local_host(); |
| 1062 | $request['headers'] = wp_json_encode( $this->get_headers(), JSON_UNESCAPED_SLASHES ); |
| 1063 | $request['jetpack_version'] = null; |
| 1064 | $request['wordpress_version'] = (string) $wp_version; |
| 1065 | $request['api_key'] = $api_key; |
| 1066 | $request['multisite'] = '0'; |
| 1067 | |
| 1068 | if ( defined( 'JETPACK__VERSION' ) ) { |
| 1069 | $request['jetpack_version'] = constant( 'JETPACK__VERSION' ); |
| 1070 | $user_agent .= ' | Jetpack/' . constant( 'JETPACK__VERSION' ); |
| 1071 | } |
| 1072 | |
| 1073 | if ( defined( 'JETPACK_PROTECT_VERSION' ) && ! defined( 'JETPACK__VERSION' ) ) { |
| 1074 | $request['jetpack_version'] = '12.1'; |
| 1075 | $user_agent .= ' | JetpackProtect/' . constant( 'JETPACK_PROTECT_VERSION' ); |
| 1076 | } |
| 1077 | |
| 1078 | if ( is_multisite() ) { |
| 1079 | $request['multisite'] = get_blog_count(); |
| 1080 | } |
| 1081 | |
| 1082 | /** |
| 1083 | * Filter controls maximum timeout in waiting for reponse from Protect servers. |
| 1084 | * |
| 1085 | * @module protect |
| 1086 | * |
| 1087 | * @since 4.0.4 |
| 1088 | * |
| 1089 | * @param int $timeout Max time (in seconds) to wait for a response. |
| 1090 | */ |
| 1091 | $timeout = apply_filters( 'jetpack_protect_connect_timeout', 30 ); |
| 1092 | |
| 1093 | $args = array( |
| 1094 | 'body' => $request, |
| 1095 | 'user-agent' => $user_agent, |
| 1096 | 'httpversion' => '1.0', |
| 1097 | 'timeout' => absint( $timeout ), |
| 1098 | ); |
| 1099 | |
| 1100 | Waf_Constants::define_brute_force_api_host(); |
| 1101 | |
| 1102 | $response_json = wp_remote_post( JETPACK_PROTECT__API_HOST, $args ); |
| 1103 | $this->last_response_raw = $response_json; |
| 1104 | |
| 1105 | $transient_name = $this->get_transient_name(); |
| 1106 | $this->delete_transient( $transient_name ); |
| 1107 | |
| 1108 | if ( is_array( $response_json ) ) { |
| 1109 | $response = json_decode( $response_json['body'], true ); |
| 1110 | } |
| 1111 | |
| 1112 | if ( isset( $response['blocked_attempts'] ) && $response['blocked_attempts'] ) { |
| 1113 | update_site_option( 'jetpack_protect_blocked_attempts', $response['blocked_attempts'] ); |
| 1114 | } |
| 1115 | |
| 1116 | if ( isset( $response['status'] ) && ! isset( $response['error'] ) ) { |
| 1117 | $response['expire'] = time() + $response['seconds_remaining']; |
| 1118 | $this->set_transient( $transient_name, $response, $response['seconds_remaining'] ); |
| 1119 | $this->delete_transient( 'brute_use_math' ); |
| 1120 | } else { // Fallback to Math Captcha if no response from API host. |
| 1121 | $this->set_transient( 'brute_use_math', 1, 600 ); |
| 1122 | $response['status'] = 'ok'; |
| 1123 | $response['math'] = true; |
| 1124 | } |
| 1125 | |
| 1126 | if ( isset( $response['error'] ) ) { |
| 1127 | update_site_option( 'jetpack_protect_error', $response['error'] ); |
| 1128 | } else { |
| 1129 | delete_site_option( 'jetpack_protect_error' ); |
| 1130 | } |
| 1131 | |
| 1132 | return $response; |
| 1133 | } |
| 1134 | |
| 1135 | /** |
| 1136 | * Gets the transient name. |
| 1137 | */ |
| 1138 | public function get_transient_name() { |
| 1139 | $headers = $this->get_headers(); |
| 1140 | $header_hash = md5( wp_json_encode( $headers, JSON_UNESCAPED_SLASHES ) ); |
| 1141 | |
| 1142 | return 'jpp_li_' . $header_hash; |
| 1143 | } |
| 1144 | |
| 1145 | /** |
| 1146 | * Wrapper for WordPress set_transient function, our version sets |
| 1147 | * the transient on the main site in the network if this is a multisite network |
| 1148 | * |
| 1149 | * We do it this way (instead of set_site_transient) because of an issue where |
| 1150 | * sitewide transients are always autoloaded |
| 1151 | * https://core.trac.wordpress.org/ticket/22846 |
| 1152 | * |
| 1153 | * @param string $transient Transient name. Expected to not be SQL-escaped. Must be |
| 1154 | * 45 characters or fewer in length. |
| 1155 | * @param mixed $value Transient value. Must be serializable if non-scalar. |
| 1156 | * Expected to not be SQL-escaped. |
| 1157 | * @param int $expiration Optional. Time until expiration in seconds. Default 0. |
| 1158 | * |
| 1159 | * @return bool False if value was not set and true if value was set. |
| 1160 | */ |
| 1161 | public function set_transient( $transient, $value, $expiration ) { |
| 1162 | return $this->on_main_site( |
| 1163 | static function () use ( $transient, $value, $expiration ) { |
| 1164 | return set_transient( $transient, $value, $expiration ); |
| 1165 | } |
| 1166 | ); |
| 1167 | } |
| 1168 | |
| 1169 | /** |
| 1170 | * Claim a login attempt token, succeeding only for the first request that claims it. |
| 1171 | * |
| 1172 | * Writes the options table directly: add_option() upserts, so concurrent claims could all succeed. |
| 1173 | * |
| 1174 | * @param string $claim_name Claim name, stored as a transient the daily purge removes. |
| 1175 | * @param int $expiration Time until expiration in seconds. |
| 1176 | * |
| 1177 | * @return bool Whether this request made the claim. |
| 1178 | */ |
| 1179 | public function add_login_attempt_claim( $claim_name, $expiration ) { |
| 1180 | return $this->on_main_site( |
| 1181 | static function () use ( $claim_name, $expiration ) { |
| 1182 | global $wpdb; |
| 1183 | |
| 1184 | $insert = "INSERT IGNORE INTO {$wpdb->options} (option_name, option_value, autoload) VALUES (%s, %s, 'off')"; |
| 1185 | // phpcs:ignore WordPress.DB.DirectDatabaseQuery, WordPress.DB.PreparedSQL.NotPrepared -- Atomic insert-if-absent has no core API; $insert is prepared here. |
| 1186 | $wpdb->query( $wpdb->prepare( $insert, '_transient_' . $claim_name, '1' ) ); |
| 1187 | if ( 1 !== (int) $wpdb->rows_affected ) { |
| 1188 | return false; |
| 1189 | } |
| 1190 | |
| 1191 | // phpcs:ignore WordPress.DB.DirectDatabaseQuery, WordPress.DB.PreparedSQL.NotPrepared -- See above. |
| 1192 | $wpdb->query( $wpdb->prepare( $insert, '_transient_timeout_' . $claim_name, (string) ( time() + $expiration ) ) ); |
| 1193 | |
| 1194 | return true; |
| 1195 | } |
| 1196 | ); |
| 1197 | } |
| 1198 | |
| 1199 | /** |
| 1200 | * Run a callback on the network's main site, where Protect keeps its transients. |
| 1201 | * |
| 1202 | * @param callable $callback Callback to run. |
| 1203 | * |
| 1204 | * @return mixed The callback's return value. |
| 1205 | */ |
| 1206 | private function on_main_site( $callback ) { |
| 1207 | if ( ! is_multisite() || is_main_site() ) { |
| 1208 | return $callback(); |
| 1209 | } |
| 1210 | |
| 1211 | switch_to_blog( $this->get_main_blog_id() ); |
| 1212 | $return = $callback(); |
| 1213 | restore_current_blog(); |
| 1214 | |
| 1215 | return $return; |
| 1216 | } |
| 1217 | |
| 1218 | /** |
| 1219 | * Wrapper for WordPress delete_transient function, our version deletes |
| 1220 | * the transient on the main site in the network if this is a multisite network |
| 1221 | * |
| 1222 | * @param string $transient Transient name. Expected to not be SQL-escaped. |
| 1223 | * |
| 1224 | * @return bool true if successful, false otherwise |
| 1225 | */ |
| 1226 | public function delete_transient( $transient ) { |
| 1227 | return $this->on_main_site( |
| 1228 | static function () use ( $transient ) { |
| 1229 | return delete_transient( $transient ); |
| 1230 | } |
| 1231 | ); |
| 1232 | } |
| 1233 | |
| 1234 | /** |
| 1235 | * Wrapper for WordPress get_transient function, our version gets |
| 1236 | * the transient on the main site in the network if this is a multisite network |
| 1237 | * |
| 1238 | * @param string $transient Transient name. Expected to not be SQL-escaped. |
| 1239 | * |
| 1240 | * @return mixed Value of transient. |
| 1241 | */ |
| 1242 | public function get_transient( $transient ) { |
| 1243 | return $this->on_main_site( |
| 1244 | static function () use ( $transient ) { |
| 1245 | return get_transient( $transient ); |
| 1246 | } |
| 1247 | ); |
| 1248 | } |
| 1249 | |
| 1250 | /** |
| 1251 | * Returns the local host. |
| 1252 | */ |
| 1253 | public function get_local_host() { |
| 1254 | if ( isset( $this->local_host ) ) { |
| 1255 | return $this->local_host; |
| 1256 | } |
| 1257 | |
| 1258 | $uri = 'http://' . strtolower( isset( $_SERVER['HTTP_HOST'] ) ? filter_var( wp_unslash( $_SERVER['HTTP_HOST'] ) ) : '' ); |
| 1259 | |
| 1260 | if ( is_multisite() ) { |
| 1261 | $uri = network_home_url(); |
| 1262 | } |
| 1263 | |
| 1264 | $domain = ''; |
| 1265 | $uridata = wp_parse_url( $uri ); |
| 1266 | if ( false !== $uridata ) { |
| 1267 | $domain = $uridata['host']; |
| 1268 | } |
| 1269 | |
| 1270 | // If we still don't have the site_url, get it. |
| 1271 | if ( ! $domain ) { |
| 1272 | $uri = get_site_url( 1 ); |
| 1273 | $uridata = wp_parse_url( $uri ); |
| 1274 | $domain = $uridata['host']; |
| 1275 | } |
| 1276 | |
| 1277 | $this->local_host = $domain; |
| 1278 | |
| 1279 | return $this->local_host; |
| 1280 | } |
| 1281 | } |