| 1 |
<?php |
| 2 |
/** |
| 3 |
* Handles IP and country-based access restrictions. |
| 4 |
* |
| 5 |
* @package WP_Defender\Component |
| 6 |
*/ |
| 7 |
|
| 8 |
namespace WP_Defender\Component; |
| 9 |
|
| 10 |
use PharData; |
| 11 |
use WP_Defender\Component; |
| 12 |
use WP_Defender\Traits\IP; |
| 13 |
use Calotes\Helper\Array_Cache; |
| 14 |
use WP_Defender\Traits\Country; |
| 15 |
use WP_Defender\Traits\Continent; |
| 16 |
use WP_Defender\Model\Lockout_Log; |
| 17 |
use MaxMind\Db\Reader\InvalidDatabaseException; |
| 18 |
use WP_Defender\Integrations\MaxMind_Geolocation; |
| 19 |
use WP_Defender\Model\Setting\Blacklist_Lockout as Model_Blacklist_Lockout; |
| 20 |
use WP_Defender\Integrations\Main_Wp; |
| 21 |
use WP_Filesystem_Base; |
| 22 |
|
| 23 |
/** |
| 24 |
* Handles operations related to IP and country-based blacklisting and whitelisting. |
| 25 |
*/ |
| 26 |
class Blacklist_Lockout extends Component { |
| 27 |
|
| 28 |
use Country; |
| 29 |
use IP; |
| 30 |
use Continent; |
| 31 |
|
| 32 |
// Define the transient key. |
| 33 |
const IP_LIST_KEY = 'wpmu_dev_ip_list'; |
| 34 |
|
| 35 |
/** |
| 36 |
* Check if a country code belongs to a continent. |
| 37 |
* |
| 38 |
* @param string $country_iso The country ISO code to check. |
| 39 |
* @param string $continent_code The continent code (EU, AS, AF, AM, OC). |
| 40 |
* @return bool True if the country belongs to the continent, false otherwise. |
| 41 |
*/ |
| 42 |
private function is_country_in_continent( $country_iso, $continent_code ): bool { |
| 43 |
$countries_with_continents = $this->get_countries_with_continents(); |
| 44 |
|
| 45 |
if ( ! isset( $countries_with_continents[ $continent_code ] ) ) { |
| 46 |
return false; |
| 47 |
} |
| 48 |
|
| 49 |
$continent = $countries_with_continents[ $continent_code ]; |
| 50 |
if ( ! isset( $continent['area'] ) ) { |
| 51 |
return false; |
| 52 |
} |
| 53 |
|
| 54 |
foreach ( $continent['area'] as $area ) { |
| 55 |
if ( isset( $area['countries'][ $country_iso ] ) ) { |
| 56 |
return true; |
| 57 |
} |
| 58 |
} |
| 59 |
|
| 60 |
return false; |
| 61 |
} |
| 62 |
|
| 63 |
/** |
| 64 |
* Checks if a given IP is whitelisted based on the country. |
| 65 |
* |
| 66 |
* @param string $ip The IP address to check. |
| 67 |
* |
| 68 |
* @return bool True if the IP is whitelisted based on the country, false otherwise. |
| 69 |
* @throws InvalidDatabaseException Thrown for unexpected data is found in DB. |
| 70 |
*/ |
| 71 |
public function is_country_whitelist( $ip ): bool { |
| 72 |
// Check Firewall > IP Banning > Locations section is activated or not. |
| 73 |
$country = $this->get_current_country( $ip ); |
| 74 |
if ( false === $country ) { |
| 75 |
return false; |
| 76 |
} |
| 77 |
$model = new Model_Blacklist_Lockout(); |
| 78 |
$whitelist = $model->get_country_whitelist(); |
| 79 |
if ( ! is_array( $whitelist ) || array() === $whitelist ) { |
| 80 |
return false; |
| 81 |
} |
| 82 |
|
| 83 |
if ( isset( $country['iso'] ) && '' !== $country['iso'] ) { |
| 84 |
$country_iso = strtoupper( $country['iso'] ); |
| 85 |
|
| 86 |
// Check if the specific country is in the whitelist. |
| 87 |
if ( in_array( $country_iso, $whitelist, true ) ) { |
| 88 |
return true; |
| 89 |
} |
| 90 |
|
| 91 |
// Check if any continent containing this country is in the whitelist. |
| 92 |
foreach ( $whitelist as $allowed_code ) { |
| 93 |
if ( $this->is_country_in_continent( $country_iso, $allowed_code ) ) { |
| 94 |
return true; |
| 95 |
} |
| 96 |
} |
| 97 |
} |
| 98 |
|
| 99 |
return false; |
| 100 |
} |
| 101 |
|
| 102 |
/** |
| 103 |
* Return the default ips need to whitelisted, e.g. HUB ips. |
| 104 |
* |
| 105 |
* @return array |
| 106 |
*/ |
| 107 |
private function get_default_ip_whitelisted(): array { |
| 108 |
$server_addr = defender_get_data_from_request( 'SERVER_ADDR', 's' ); |
| 109 |
$remote_addr = defender_get_data_from_request( 'REMOTE_ADDR', 's' ); |
| 110 |
$ips = array( |
| 111 |
...$this->fetch_latest_ips(), |
| 112 |
'127.0.0.1', |
| 113 |
isset( $server_addr ) ? $server_addr : $remote_addr, |
| 114 |
); |
| 115 |
|
| 116 |
return (array) apply_filters( 'ip_lockout_default_whitelist_ip', $ips ); |
| 117 |
} |
| 118 |
|
| 119 |
/** |
| 120 |
* Fetch the latest IP list from the API. |
| 121 |
* |
| 122 |
* @return array List of IPs or an empty array on failure. |
| 123 |
*/ |
| 124 |
public static function fetch_latest_ips(): array { |
| 125 |
// Attempt to retrieve IPs from the cache. |
| 126 |
$cached_ips = get_site_transient( self::IP_LIST_KEY ); |
| 127 |
if ( is_array( $cached_ips ) && array() !== $cached_ips ) { |
| 128 |
return $cached_ips; |
| 129 |
} |
| 130 |
|
| 131 |
// Fetch the IP list from the remote API. |
| 132 |
$response = wp_remote_get( |
| 133 |
'https://gist.githubusercontent.com/wpmu-docs/568114153e93eaf28f908a724b313b6f/raw', |
| 134 |
array( |
| 135 |
'timeout' => 10, |
| 136 |
) |
| 137 |
); |
| 138 |
|
| 139 |
// Check for errors in the API response. |
| 140 |
if ( is_wp_error( $response ) ) { |
| 141 |
return array(); |
| 142 |
} |
| 143 |
|
| 144 |
// Retrieve the response body. |
| 145 |
$body = wp_remote_retrieve_body( $response ); |
| 146 |
if ( '' === $body ) { |
| 147 |
return array(); |
| 148 |
} |
| 149 |
|
| 150 |
// Process the response body into an array of IPs. |
| 151 |
$ip_list = array_filter( |
| 152 |
array_map( |
| 153 |
'sanitize_text_field', |
| 154 |
explode( "\n", $body ) |
| 155 |
), |
| 156 |
function ( $value ) { |
| 157 |
return '' !== trim( $value ); |
| 158 |
} |
| 159 |
); |
| 160 |
|
| 161 |
// Cache the IP list for a week if it is not empty. |
| 162 |
if ( array() !== $ip_list ) { |
| 163 |
set_site_transient( self::IP_LIST_KEY, $ip_list, WEEK_IN_SECONDS ); |
| 164 |
} |
| 165 |
|
| 166 |
// Return the fetched IP list. |
| 167 |
return $ip_list; |
| 168 |
} |
| 169 |
|
| 170 |
/** |
| 171 |
* Checks if an IP is whitelisted. |
| 172 |
* |
| 173 |
* @param string $ip The IP address to check. |
| 174 |
* |
| 175 |
* @return bool True if the IP is whitelisted, false otherwise. |
| 176 |
*/ |
| 177 |
public function is_ip_whitelisted( $ip ): bool { |
| 178 |
if ( in_array( $ip, $this->get_default_ip_whitelisted(), true ) ) { |
| 179 |
return true; |
| 180 |
} |
| 181 |
|
| 182 |
// If the IP is the server public IP. |
| 183 |
$server_public_ip = wd_di()->get( Firewall::class )->get_whitelist_server_public_ip(); |
| 184 |
if ( '' !== $server_public_ip && $server_public_ip === $ip ) { |
| 185 |
return true; |
| 186 |
} |
| 187 |
|
| 188 |
// If the IP is the MainWP Dashboard public IP. |
| 189 |
$mainwp_dashboard_public_ip = wd_di()->get( Main_Wp::class )->get_whitelist_dashboard_public_ip(); |
| 190 |
if ( array() !== $mainwp_dashboard_public_ip && in_array( $ip, $mainwp_dashboard_public_ip, true ) ) { |
| 191 |
return true; |
| 192 |
} |
| 193 |
|
| 194 |
$blacklist_settings = new Model_Blacklist_Lockout(); |
| 195 |
|
| 196 |
return $this->is_ip_in_format( $ip, $blacklist_settings->get_list( 'allowlist' ) ); |
| 197 |
} |
| 198 |
|
| 199 |
/** |
| 200 |
* Checks if an IP is blacklisted. |
| 201 |
* |
| 202 |
* @param string $ip The IP address to check. |
| 203 |
* |
| 204 |
* @return bool True if the IP is blacklisted, false otherwise. |
| 205 |
*/ |
| 206 |
public function is_blacklist( $ip ) { |
| 207 |
$blacklist_settings = new Model_Blacklist_Lockout(); |
| 208 |
|
| 209 |
return $this->is_ip_in_format( $ip, $blacklist_settings->get_list( 'blocklist' ) ); |
| 210 |
} |
| 211 |
|
| 212 |
/** |
| 213 |
* Checks if a country is blacklisted based on the IP address. |
| 214 |
* |
| 215 |
* @param string $ip The IP address to check. |
| 216 |
* |
| 217 |
* @return bool True if the country is blacklisted, false otherwise. |
| 218 |
* @throws InvalidDatabaseException Thrown for unexpected data is found in DB. |
| 219 |
*/ |
| 220 |
public function is_country_blacklist( $ip ): bool { |
| 221 |
// Check Firewall > IP Banning > Locations section is activated or not. |
| 222 |
$country = $this->get_current_country( $ip ); |
| 223 |
if ( false === $country ) { |
| 224 |
return false; |
| 225 |
} |
| 226 |
$blacklist_settings = new Model_Blacklist_Lockout(); |
| 227 |
$blacklisted = $blacklist_settings->get_country_blacklist(); |
| 228 |
if ( array() === $blacklisted ) { |
| 229 |
return false; |
| 230 |
} |
| 231 |
if ( in_array( 'all', $blacklisted, true ) ) { |
| 232 |
return true; |
| 233 |
} |
| 234 |
|
| 235 |
if ( isset( $country['iso'] ) && '' !== $country['iso'] ) { |
| 236 |
$country_iso = strtoupper( $country['iso'] ); |
| 237 |
|
| 238 |
// Check if the specific country is in the blacklist. |
| 239 |
if ( in_array( $country_iso, $blacklisted, true ) ) { |
| 240 |
return true; |
| 241 |
} |
| 242 |
|
| 243 |
// Check if any continent containing this country is in the blacklist. |
| 244 |
foreach ( $blacklisted as $blocked_code ) { |
| 245 |
if ( $this->is_country_in_continent( $country_iso, $blocked_code ) ) { |
| 246 |
return true; |
| 247 |
} |
| 248 |
} |
| 249 |
} |
| 250 |
|
| 251 |
return false; |
| 252 |
} |
| 253 |
|
| 254 |
/** |
| 255 |
* Verifies the format of an imported file for IP lockout settings. |
| 256 |
* |
| 257 |
* @param string $file Path to the file to verify. |
| 258 |
* |
| 259 |
* @return array|bool Array of data if the file is valid, false otherwise. |
| 260 |
*/ |
| 261 |
public function verify_import_file( $file ) { |
| 262 |
global $wp_filesystem; |
| 263 |
// Initialize the WP filesystem, no more using 'file-put-contents' function. |
| 264 |
if ( ! $wp_filesystem instanceof WP_Filesystem_Base ) { |
| 265 |
require_once ABSPATH . '/wp-admin/includes/file.php'; |
| 266 |
WP_Filesystem(); |
| 267 |
} |
| 268 |
$lines = $wp_filesystem->get_contents_array( $file ); |
| 269 |
$data = array(); |
| 270 |
foreach ( $lines as $line ) { |
| 271 |
$line = str_getcsv( $line, ',', '"', '\\' ); |
| 272 |
if ( count( $line ) !== 2 ) { |
| 273 |
return false; |
| 274 |
} |
| 275 |
if ( ! in_array( $line[1], array( 'allowlist', 'blocklist' ), true ) ) { |
| 276 |
return false; |
| 277 |
} |
| 278 |
if ( false === $this->validate_ip( $line[0] ) ) { |
| 279 |
continue; |
| 280 |
} |
| 281 |
$data[] = $line; |
| 282 |
} |
| 283 |
return $data; |
| 284 |
} |
| 285 |
|
| 286 |
/** |
| 287 |
* Adds a default whitelisted country to the model. |
| 288 |
* |
| 289 |
* @param Model_Blacklist_Lockout $model The model to update. |
| 290 |
* @param string $country_iso The ISO code of the country to whitelist. |
| 291 |
* |
| 292 |
* @return Model_Blacklist_Lockout The updated model. |
| 293 |
* @since 2.8.0 |
| 294 |
*/ |
| 295 |
public function add_default_whitelisted_country( Model_Blacklist_Lockout $model, $country_iso ) { |
| 296 |
if ( array() === $model->country_whitelist ) { |
| 297 |
$model->country_whitelist[] = $country_iso; |
| 298 |
} elseif ( ! in_array( $country_iso, $model->country_whitelist, true ) ) { |
| 299 |
$model->country_whitelist[] = $country_iso; |
| 300 |
} |
| 301 |
|
| 302 |
return $model; |
| 303 |
} |
| 304 |
|
| 305 |
/** |
| 306 |
* Check downloaded GeoDB. |
| 307 |
* |
| 308 |
* @return bool |
| 309 |
* @throws InvalidDatabaseException Thrown for unexpected data is found in DB. |
| 310 |
*/ |
| 311 |
public function is_geodb_downloaded(): bool { |
| 312 |
$model = new Model_Blacklist_Lockout(); |
| 313 |
$license_key = $model->maxmind_license_key; |
| 314 |
// Using Geo DB without a license key is not advisable. |
| 315 |
if ( '' === $license_key && is_file( $model->geodb_path ) ) { |
| 316 |
$service_geo = wd_di()->get( MaxMind_Geolocation::class ); |
| 317 |
$service_geo->delete_database(); |
| 318 |
$model->geodb_path = ''; |
| 319 |
$model->save(); |
| 320 |
|
| 321 |
return false; |
| 322 |
} |
| 323 |
|
| 324 |
// Likely the case after the config import with the existed MaxMind license key. |
| 325 |
if ( |
| 326 |
'' !== $license_key |
| 327 |
&& ( is_null( $model->geodb_path ) || ! is_file( $model->geodb_path ) ) |
| 328 |
) { |
| 329 |
$service_geo = wd_di()->get( MaxMind_Geolocation::class ); |
| 330 |
$tmp = $service_geo->get_downloaded_url( $license_key ); |
| 331 |
if ( ! is_wp_error( $tmp ) ) { |
| 332 |
$phar = new PharData( $tmp ); |
| 333 |
$path = $service_geo->get_db_base_path(); |
| 334 |
if ( ! is_dir( $path ) ) { |
| 335 |
wp_mkdir_p( $path ); |
| 336 |
} |
| 337 |
$phar->extractTo( $path, null, true ); |
| 338 |
$model->geodb_path = $path . DIRECTORY_SEPARATOR . $phar->current()->getFileName() . DIRECTORY_SEPARATOR . $service_geo->get_db_full_name(); |
| 339 |
// Save because we'll check for a saved path. |
| 340 |
$model->save(); |
| 341 |
|
| 342 |
if ( file_exists( $tmp ) ) { |
| 343 |
wp_delete_file( $tmp ); |
| 344 |
} |
| 345 |
|
| 346 |
if ( array() === $model->country_whitelist ) { |
| 347 |
$is_country = false; |
| 348 |
foreach ( $this->get_user_ip() as $ip ) { |
| 349 |
$country = $this->get_current_country( $ip ); |
| 350 |
|
| 351 |
if ( isset( $country['iso'] ) && '' !== $country['iso'] ) { |
| 352 |
$model = $this->add_default_whitelisted_country( $model, $country['iso'] ); |
| 353 |
$is_country = true; |
| 354 |
} |
| 355 |
} |
| 356 |
|
| 357 |
if ( false === $is_country ) { |
| 358 |
return false; |
| 359 |
} |
| 360 |
} |
| 361 |
$model->save(); |
| 362 |
} |
| 363 |
} |
| 364 |
|
| 365 |
// Check again. |
| 366 |
if ( is_null( $model->geodb_path ) || ! is_file( $model->geodb_path ) ) { |
| 367 |
return false; |
| 368 |
} |
| 369 |
|
| 370 |
// Check if the file exists on the site. The file can exist on the same server but for different sites. |
| 371 |
// For example, after config importing. |
| 372 |
$path_parts = pathinfo( $model->geodb_path ); |
| 373 |
if ( preg_match( '/(\/wp-content\/.+)/', $path_parts['dirname'], $matches ) ) { |
| 374 |
$rel_path = $matches[1]; |
| 375 |
$rel_path = ltrim( $rel_path, '/' ); |
| 376 |
$abs_path = ABSPATH . $rel_path; |
| 377 |
if ( ! is_dir( $abs_path ) ) { |
| 378 |
wp_mkdir_p( $abs_path ); |
| 379 |
} |
| 380 |
|
| 381 |
$rel_path = $abs_path . DIRECTORY_SEPARATOR . $path_parts['basename']; |
| 382 |
if ( file_exists( $rel_path ) ) { |
| 383 |
return true; |
| 384 |
} elseif ( ! is_null( $model->geodb_path ) && '' !== $model->geodb_path && file_exists( $model->geodb_path ) ) { |
| 385 |
// The case if ABSPATH was changed e.g. in wp-config.php. |
| 386 |
return true; |
| 387 |
} |
| 388 |
|
| 389 |
if ( $this->validate_geodb_file( $model->geodb_path ) ) { |
| 390 |
global $wp_filesystem; |
| 391 |
if ( ! $wp_filesystem instanceof WP_Filesystem_Base ) { |
| 392 |
require_once ABSPATH . '/wp-admin/includes/file.php'; |
| 393 |
WP_Filesystem(); |
| 394 |
} |
| 395 |
|
| 396 |
if ( $wp_filesystem->move( $model->geodb_path, $rel_path ) ) { |
| 397 |
$wp_filesystem->chmod( $rel_path, 0644 ); |
| 398 |
$model->geodb_path = $rel_path; |
| 399 |
$model->save(); |
| 400 |
} |
| 401 |
} else { |
| 402 |
return false; |
| 403 |
} |
| 404 |
} |
| 405 |
|
| 406 |
return true; |
| 407 |
} |
| 408 |
|
| 409 |
/** |
| 410 |
* Validates GeoDB file for security before processing. |
| 411 |
* |
| 412 |
* @param string $file_path Path to the file to validate. |
| 413 |
* @return bool True if file is valid, false otherwise. |
| 414 |
*/ |
| 415 |
private function validate_geodb_file( $file_path ): bool { |
| 416 |
if ( ! file_exists( $file_path ) ) { |
| 417 |
return false; |
| 418 |
} |
| 419 |
|
| 420 |
$allowed_extensions = array( 'mmdb' ); |
| 421 |
$file_extension = strtolower( pathinfo( $file_path, PATHINFO_EXTENSION ) ); |
| 422 |
|
| 423 |
if ( ! in_array( $file_extension, $allowed_extensions, true ) ) { |
| 424 |
return false; |
| 425 |
} |
| 426 |
|
| 427 |
$file_size = filesize( $file_path ); |
| 428 |
$max_size = 100 * 1024 * 1024; // 100MB. |
| 429 |
|
| 430 |
if ( $max_size < $file_size || 0 === $file_size ) { |
| 431 |
return false; |
| 432 |
} |
| 433 |
|
| 434 |
global $wp_filesystem; |
| 435 |
if ( ! $wp_filesystem instanceof WP_Filesystem_Base ) { |
| 436 |
require_once ABSPATH . 'wp-admin/includes/file.php'; |
| 437 |
WP_Filesystem(); |
| 438 |
} |
| 439 |
|
| 440 |
// Read only first 4 bytes for header validation. |
| 441 |
$header = $wp_filesystem->get_contents( $file_path ); |
| 442 |
if ( false === $header || strlen( $header ) < 4 ) { |
| 443 |
return false; |
| 444 |
} |
| 445 |
$header = substr( $header, 0, 4 ); |
| 446 |
// MaxMind DB format magic bytes: 0xABCDEF00 . |
| 447 |
if ( "\xab\xcd\xef\x00" !== $header ) { |
| 448 |
return false; |
| 449 |
} |
| 450 |
|
| 451 |
return true; |
| 452 |
} |
| 453 |
|
| 454 |
/** |
| 455 |
* Retrieves the top countries from which IPs have been blocked. |
| 456 |
* |
| 457 |
* @param int $limit The maximum number of countries to return. |
| 458 |
* @param int $max_age_days The maximum age of log entries to consider. |
| 459 |
* |
| 460 |
* @return array List of countries and their blocked IP count. |
| 461 |
*/ |
| 462 |
public function get_top_countries_blocked( $limit = 10, $max_age_days = 7 ) { |
| 463 |
$result = Array_Cache::get( 'countries', 'ip_lockout', array() ); |
| 464 |
if ( array() === $result ) { |
| 465 |
global $wpdb; |
| 466 |
|
| 467 |
$result = $wpdb->get_results( // phpcs:ignore WordPress.DB.DirectDatabaseQuery |
| 468 |
$wpdb->prepare( |
| 469 |
"SELECT country_iso_code, COUNT(ip) AS ip_count FROM {$wpdb->base_prefix}defender_lockout_log WHERE (type = %s OR type = %s OR type = %s) AND date >= %d AND country_iso_code IS NOT NULL GROUP BY country_iso_code ORDER BY ip_count DESC LIMIT %d", |
| 470 |
Lockout_Log::LOCKOUT_404, |
| 471 |
Lockout_Log::AUTH_LOCK, |
| 472 |
Lockout_Log::LOCKOUT_UA, |
| 473 |
strtotime( '-' . $max_age_days . ' days', time() ), |
| 474 |
$limit |
| 475 |
), |
| 476 |
ARRAY_A |
| 477 |
); |
| 478 |
// Get data from cache. |
| 479 |
Array_Cache::set( 'countries', $result, 'ip_lockout' ); |
| 480 |
} |
| 481 |
|
| 482 |
return array() !== $result ? $result : array(); |
| 483 |
} |
| 484 |
|
| 485 |
/** |
| 486 |
* Is IP on BLC Whitelist? |
| 487 |
* |
| 488 |
* @return bool |
| 489 |
* @since 4.2.0 |
| 490 |
*/ |
| 491 |
public function is_blc_ip_whitelisted(): bool { |
| 492 |
$ips = $this->get_user_ip(); |
| 493 |
$blc_ips = array( |
| 494 |
'165.227.127.103', |
| 495 |
'64.176.196.23', |
| 496 |
'144.202.86.106', |
| 497 |
); |
| 498 |
$diff = array_diff( $ips, $blc_ips ); |
| 499 |
|
| 500 |
return array() === $diff; |
| 501 |
} |
| 502 |
|
| 503 |
/** |
| 504 |
* Checks if a list of IPs are all whitelisted. |
| 505 |
* |
| 506 |
* @param array $ips List of IPs to check. |
| 507 |
* |
| 508 |
* @return bool True if all IPs are whitelisted, false otherwise. |
| 509 |
* @since 4.4.2 |
| 510 |
*/ |
| 511 |
public function are_ips_whitelisted( array $ips ): bool { |
| 512 |
foreach ( $ips as $ip ) { |
| 513 |
if ( ! $this->is_ip_whitelisted( $ip ) ) { |
| 514 |
return false; |
| 515 |
} |
| 516 |
} |
| 517 |
|
| 518 |
return true; |
| 519 |
} |
| 520 |
} |
| 521 |
|
