admin
1 year ago
lib
1 year ago
captcha.php
2 years ago
cloudsecure-wp.php
1 year ago
common.php
1 year ago
config.php
2 years ago
disable-access-system-file.php
1 year ago
disable-author-query.php
2 years ago
disable-login.php
1 year ago
disable-restapi.php
2 years ago
disable-xmlrpc.php
2 years ago
htaccess.php
1 year ago
login-log.php
1 year ago
login-notification.php
1 year ago
rename-login-page.php
2 years ago
restrict-admin-page.php
1 year ago
server-error-notification.php
1 year ago
two-factor-authentication.php
1 year ago
unify-messages.php
2 years ago
update-notice.php
2 years ago
waf-engine.php
1 year ago
waf.php
1 year ago
waf-engine.php
754 lines
| 1 | <?php |
| 2 | |
| 3 | if ( ! defined( 'ABSPATH' ) ) { |
| 4 | exit; |
| 5 | } |
| 6 | |
| 7 | class CloudSecureWP_Waf_Engine extends CloudSecureWP_Common { |
| 8 | protected const VARIABLE_ARGS = 'args'; |
| 9 | protected const VARIABLE_ARGS_NAMES = 'args_names'; |
| 10 | protected const VARIABLE_REQUEST_COOKIES = 'request_cookies'; |
| 11 | protected const VARIABLE_REQUEST_COOKIES_NAMES = 'request_cookies_names'; |
| 12 | protected const VARIABLE_REQUEST_HEADERS = 'request_headers'; |
| 13 | protected const VARIABLE_REQUEST_FILENAME = 'request_filename'; |
| 14 | protected const VARIABLE_XML = 'xml'; |
| 15 | private $parsed_xml; |
| 16 | |
| 17 | |
| 18 | |
| 19 | function __construct( array $info ) { |
| 20 | parent::__construct( $info ); |
| 21 | |
| 22 | } |
| 23 | |
| 24 | |
| 25 | /** |
| 26 | * XML パース時のコールバック関数 |
| 27 | * |
| 28 | * @return void |
| 29 | */ |
| 30 | public function char( $parser, $data ): void { |
| 31 | $this->parsed_xml .= $data; |
| 32 | } |
| 33 | |
| 34 | |
| 35 | /** |
| 36 | * XML パース |
| 37 | * |
| 38 | * @return string |
| 39 | */ |
| 40 | public function xml_parser(): string { |
| 41 | $request_body = file_get_contents( 'php://input' ); |
| 42 | $this->parsed_xml = ''; |
| 43 | |
| 44 | if ( ! empty( $request_body ) ) { |
| 45 | $parser = xml_parser_create(); |
| 46 | |
| 47 | xml_set_object( $parser, $this ); |
| 48 | xml_set_character_data_handler( $parser, 'char' ); |
| 49 | |
| 50 | if ( ! xml_parse( $parser, $request_body ) ) { |
| 51 | $this->parsed_xml .= 'xml_parse_failed'; |
| 52 | }; |
| 53 | |
| 54 | xml_parser_free( $parser ); |
| 55 | } |
| 56 | |
| 57 | return $this->parsed_xml; |
| 58 | } |
| 59 | |
| 60 | |
| 61 | /** |
| 62 | * ARGS、ARGS_NAMES 用 クエリ文字列、POSTデータ取得 |
| 63 | * |
| 64 | * @return array |
| 65 | */ |
| 66 | public function get_request_args_data(): array { |
| 67 | $args = array(); |
| 68 | |
| 69 | if ( ! empty( $_GET ) ) { |
| 70 | $args = $_GET; |
| 71 | } |
| 72 | |
| 73 | if ( ! empty( $_POST ) ) { |
| 74 | $args = array_merge( $args, $_POST ); |
| 75 | |
| 76 | } else { |
| 77 | $post_data = file_get_contents( 'php://input' ); |
| 78 | |
| 79 | if ( ! empty( $post_data ) ) { |
| 80 | $json_decoded_post_data = json_decode( $post_data, true ); |
| 81 | |
| 82 | // nullでなければjsonとなる |
| 83 | if ( isset( $json_decoded_post_data ) ) { |
| 84 | $args = array_merge( $args, $json_decoded_post_data ); |
| 85 | } |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | return $args; |
| 90 | } |
| 91 | |
| 92 | |
| 93 | /** |
| 94 | * Cookie� |
| 95 | 報取得 |
| 96 | * |
| 97 | * @return array |
| 98 | */ |
| 99 | public function get_request_cookies(): array { |
| 100 | if ( ! empty( $_COOKIE ) ) { |
| 101 | return $_COOKIE; |
| 102 | } else { |
| 103 | return array(); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | |
| 108 | /** |
| 109 | * リクエスト� |
| 110 | 報取得 |
| 111 | * 取得・パースできなかったものに関しては空白で返す |
| 112 | * |
| 113 | * @return array |
| 114 | */ |
| 115 | public function get_request_items(): array { |
| 116 | $request_items = array( |
| 117 | 'access_at' => current_time( 'mysql' ), |
| 118 | 'ip' => $this->get_client_ip(), |
| 119 | self::VARIABLE_XML => $this->xml_parser(), |
| 120 | self::VARIABLE_REQUEST_FILENAME => $this->get_request_uri(), |
| 121 | self::VARIABLE_REQUEST_HEADERS => $this->get_http_request_headers(), |
| 122 | self::VARIABLE_ARGS => $this->get_request_args_data(), |
| 123 | self::VARIABLE_REQUEST_COOKIES => $this->get_request_cookies(), |
| 124 | ); |
| 125 | |
| 126 | return $request_items; |
| 127 | } |
| 128 | |
| 129 | |
| 130 | /** |
| 131 | * ルールの設定を参考に1つのリクエスト� |
| 132 | 報に対して複数の変換を行う処理 |
| 133 | * |
| 134 | * @param array $transformations |
| 135 | * @param string $request_item |
| 136 | * @return string |
| 137 | */ |
| 138 | public function transform( $transformations, $request_item ): string { |
| 139 | $converted_request_item = $request_item; |
| 140 | |
| 141 | foreach ( $transformations as $transformation ) { |
| 142 | switch ( $transformation ) { |
| 143 | case 'htmlentitydecode': |
| 144 | $converted_request_item = html_entity_decode( $converted_request_item, ENT_QUOTES, 'utf-8' ); |
| 145 | break; |
| 146 | case 'lowercase': |
| 147 | $converted_request_item = strtolower( $converted_request_item ); |
| 148 | break; |
| 149 | case 'replacecomments': |
| 150 | $converted_request_item = preg_replace( '/(\/\*.*?\*\/|\/\*.*(?!\*\/).*)/s', ' ', $converted_request_item ); |
| 151 | break; |
| 152 | case 'compresswhitespace': |
| 153 | $converted_request_item = preg_replace( '/(\s|\xa0)/s', ' ', $converted_request_item ); |
| 154 | $converted_request_item = preg_replace( '/\s{2,}/s', ' ', $converted_request_item ); |
| 155 | break; |
| 156 | default: |
| 157 | $converted_request_item = '変換に失敗しました'; |
| 158 | break 2; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | return $converted_request_item; |
| 163 | } |
| 164 | |
| 165 | |
| 166 | /** |
| 167 | * LocationMatch設定によるルールのスキップ用関数 |
| 168 | * |
| 169 | * @param array $locationmatch_rules |
| 170 | * @param string $request_uri |
| 171 | * @return array |
| 172 | */ |
| 173 | public function locationmatch_remove_rules( $locationmatch_rules, $request_uri ): array { |
| 174 | $locationmatch_removed_rule_ids = array(); |
| 175 | |
| 176 | foreach ( $locationmatch_rules as $locationmatch_rule ) { |
| 177 | if ( preg_match( '/' . $locationmatch_rule['path'] . '/', $request_uri ) ) { |
| 178 | $locationmatch_removed_rule_ids = array_merge( $locationmatch_removed_rule_ids, $locationmatch_rule['remove_rule_ids'] ); |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | $locationmatch_removed_rule_ids = array_unique( $locationmatch_removed_rule_ids ); |
| 183 | |
| 184 | return $locationmatch_removed_rule_ids; |
| 185 | } |
| 186 | |
| 187 | |
| 188 | /** |
| 189 | * skip表記の存在確認 |
| 190 | * |
| 191 | * @param int $skip |
| 192 | * @return int |
| 193 | */ |
| 194 | public function check_skip( $skip ): int { |
| 195 | if ( $skip !== 0 ) { |
| 196 | return $skip; |
| 197 | } else { |
| 198 | return 0; |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | |
| 203 | /** |
| 204 | * skipafter表記の存在確認 |
| 205 | * |
| 206 | * @param string $skipafter |
| 207 | * @return string |
| 208 | */ |
| 209 | public function check_skipafter( $skipafter ): string { |
| 210 | if ( ! empty( $skipafter ) ) { |
| 211 | return $skipafter; |
| 212 | } else { |
| 213 | return ''; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | |
| 218 | /** |
| 219 | * skipが有効か判定 |
| 220 | * |
| 221 | * @param int $skip |
| 222 | * @return bool |
| 223 | */ |
| 224 | public function is_skip_enabled( $skip ): bool { |
| 225 | if ( 0 < $skip ) { |
| 226 | return true; |
| 227 | } else { |
| 228 | return false; |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | |
| 233 | /** |
| 234 | * skipafterが有効か判定 |
| 235 | * |
| 236 | * @param string $skipafter |
| 237 | * @return bool |
| 238 | */ |
| 239 | public function is_skipafter_enabled( $skipafter ): bool { |
| 240 | if ( ! empty( $skipafter ) ) { |
| 241 | return true; |
| 242 | } else { |
| 243 | return false; |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * ルールが終了したか判定 |
| 249 | * |
| 250 | * @param string $chain |
| 251 | * @param string $skip |
| 252 | * @param string $skipafter |
| 253 | * @return bool |
| 254 | */ |
| 255 | public function is_rule_finished( $chain, $skip, $skipafter ): bool { |
| 256 | if ( ! empty( $chain ) || $this->is_skip_enabled( $skip ) || $this->is_skipafter_enabled( $skipafter ) ) { |
| 257 | return false; |
| 258 | } else { |
| 259 | return true; |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | |
| 264 | /** |
| 265 | * ルール� |
| 266 | に除外の表記があるか確認 |
| 267 | * |
| 268 | * @param array $remove_variables |
| 269 | * @param string $variable |
| 270 | * @param string $request_item |
| 271 | * @return bool |
| 272 | */ |
| 273 | public function is_remove_variables( $remove_variables, $variable, $request_item ): bool { |
| 274 | if ( ! empty( $remove_variables ) ) { |
| 275 | foreach ( $remove_variables as $remove_variable => $remove_values ) { |
| 276 | if ( $remove_variable === $variable ) { |
| 277 | foreach ( $remove_values as $remove_value ) { |
| 278 | |
| 279 | // REQUEST_HEADERSの場合は大文字小文字関係なく判定する |
| 280 | if ( $variable === self::VARIABLE_REQUEST_HEADERS ) { |
| 281 | if ( preg_match( '/' . $remove_value . '/i', $request_item ) ) { |
| 282 | return true; |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | if ( preg_match( '/^\/.+\/$/', $remove_value ) ) { |
| 287 | // 除外の値が部分一致(/で囲まれているもの)の場合 |
| 288 | if ( preg_match( $remove_value . 's', $request_item ) ) { |
| 289 | return true; |
| 290 | } |
| 291 | } else { |
| 292 | // 除外の値が完� |
| 293 | �一致の場合 |
| 294 | if ( $remove_value === $request_item ) { |
| 295 | return true; |
| 296 | } |
| 297 | } |
| 298 | } |
| 299 | } |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | return false; |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * マッチした結果を� |
| 308 | �列に格納 |
| 309 | * |
| 310 | * @param array $rule |
| 311 | * @param array $request_items |
| 312 | * @param string $variable |
| 313 | * @param string $match_string |
| 314 | * @return array |
| 315 | */ |
| 316 | public function get_match_results( $rule, $request_items, $variable, $match_string ): array { |
| 317 | |
| 318 | if ( isset( $_SERVER['HTTP_HOST'] ) && isset( $_SERVER['REQUEST_URI'] ) ) { |
| 319 | $complete_url = ( empty( $_SERVER['HTTPS'] ) ? 'http://' : 'https://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; |
| 320 | } else { |
| 321 | $complete_url = ''; |
| 322 | } |
| 323 | |
| 324 | $match_results = array( |
| 325 | 'id' => $rule['id'], |
| 326 | 'attack' => $rule['attack'], |
| 327 | 'variable' => $variable, |
| 328 | 'matched' => $match_string, |
| 329 | 'ip' => $request_items['ip'], |
| 330 | 'access_at' => $request_items['access_at'], |
| 331 | 'url' => $complete_url, |
| 332 | ); |
| 333 | |
| 334 | return $match_results; |
| 335 | } |
| 336 | |
| 337 | |
| 338 | /** |
| 339 | * chain_itemsの取得 |
| 340 | * |
| 341 | * @param array $rule |
| 342 | * @return array |
| 343 | */ |
| 344 | public function get_chain_items( $rule ): array { |
| 345 | $chain_items = array( |
| 346 | 'id' => $rule['id'], |
| 347 | 'attack' => $rule['attack'], |
| 348 | 'skip' => $rule['skip'], |
| 349 | 'skipafter' => $rule['skipafter'], |
| 350 | ); |
| 351 | |
| 352 | return $chain_items; |
| 353 | } |
| 354 | |
| 355 | |
| 356 | /** |
| 357 | * マッチしたルールの設定、結果を取得 |
| 358 | * |
| 359 | * @param array $waf_rule |
| 360 | * @param array $request_items |
| 361 | * @param string $variable |
| 362 | * @param array $chain_items |
| 363 | * @param array $match_string |
| 364 | * @return array |
| 365 | */ |
| 366 | public function get_rule_settings_and_results( $waf_rule, $request_items, $variable, $chain_items, $match_string ): array { |
| 367 | $results = array( |
| 368 | 'is_matched' => true, |
| 369 | 'chain_items' => array(), |
| 370 | 'skip' => 0, |
| 371 | 'skipafter' => '', |
| 372 | 'match_results' => array(), |
| 373 | ); |
| 374 | |
| 375 | // 前ルールからchainの設定を引き継いでいるか確認 |
| 376 | if ( ! empty( $chain_items ) ) { |
| 377 | if ( $waf_rule['attack'] === '' && $this->is_rule_finished( $waf_rule['chain'], $waf_rule['skip'], $waf_rule['skipafter'] ) ) { |
| 378 | // ルールの終了判定がtrueではあるが、攻撃種別が設定されていない場合はマッチ用のルールではないのでマッチしていないと判定 |
| 379 | $results['is_matched'] = false; |
| 380 | |
| 381 | } elseif ( $this->is_rule_finished( $waf_rule['chain'], $chain_items['skip'], $chain_items['skipafter'] ) ) { |
| 382 | $results['match_results'] = $this->get_match_results( $chain_items, $request_items, $variable, $match_string ); |
| 383 | |
| 384 | } elseif ( $waf_rule['chain'] ) { |
| 385 | // 現在のルールにchainの設定がある場合 |
| 386 | $results['chain_items'] = $chain_items; |
| 387 | |
| 388 | } else { |
| 389 | $results['skip'] = $this->check_skip( $chain_items['skip'] ); |
| 390 | $results['skipafter'] = $this->check_skipafter( $chain_items['skipafter'] ); |
| 391 | } |
| 392 | } else { |
| 393 | if ( $waf_rule['attack'] === '' && $this->is_rule_finished( $waf_rule['chain'], $waf_rule['skip'], $waf_rule['skipafter'] ) ) { |
| 394 | // ルールの終了判定がtrueではあるが、攻撃種別が設定されていない場合はマッチ用のルールではないのでマッチしていないと判定 |
| 395 | $results['is_matched'] = false; |
| 396 | |
| 397 | } elseif ( $this->is_rule_finished( $waf_rule['chain'], $waf_rule['skip'], $waf_rule['skipafter'] ) ) { |
| 398 | $results['match_results'] = $this->get_match_results( $waf_rule, $request_items, $variable, $match_string ); |
| 399 | |
| 400 | } elseif ( $waf_rule['chain'] ) { |
| 401 | // 現在のルールにchainの設定がある場合 |
| 402 | $results['chain_items'] = $this->get_chain_items( $waf_rule ); |
| 403 | |
| 404 | } else { |
| 405 | $results['skip'] = $this->check_skip( $waf_rule['skip'] ); |
| 406 | $results['skipafter'] = $this->check_skipafter( $waf_rule['skipafter'] ); |
| 407 | } |
| 408 | } |
| 409 | return $results; |
| 410 | } |
| 411 | |
| 412 | /** |
| 413 | * ネストした� |
| 414 | �列をパース |
| 415 | * |
| 416 | * @param string $name |
| 417 | * @param array $array |
| 418 | */ |
| 419 | public function parse_array( $name, $array ) { |
| 420 | $parsed_array = array(); |
| 421 | |
| 422 | foreach ( $array as $key => $val ) { |
| 423 | if ( is_array( $val ) ) { |
| 424 | $tmp_name = $name . '[' . $key . ']'; |
| 425 | $tmp_parsed_array = $this->parse_array( $tmp_name, $val ); |
| 426 | $parsed_array = array_merge( $parsed_array, $tmp_parsed_array ); |
| 427 | |
| 428 | } else { |
| 429 | $parsed_array_key = $name . '[' . $key . ']'; |
| 430 | $parsed_array[ $parsed_array_key ] = $val; |
| 431 | } |
| 432 | } |
| 433 | return $parsed_array; |
| 434 | } |
| 435 | |
| 436 | |
| 437 | /** |
| 438 | * リクエスト� |
| 439 | 報� |
| 440 | �列を使用するルール判定 |
| 441 | * |
| 442 | * @param array $waf_rule |
| 443 | * @param array $request_items |
| 444 | * @param string $variable |
| 445 | * @param array $chain_items |
| 446 | * @return array |
| 447 | */ |
| 448 | public function check_request_item_array( $waf_rule, $request_items, $variable, $chain_items ) { |
| 449 | $results = array( |
| 450 | 'is_matched' => false, |
| 451 | 'chain_items' => array(), |
| 452 | 'skip' => 0, |
| 453 | 'skipafter' => '', |
| 454 | 'match_results' => array(), |
| 455 | ); |
| 456 | |
| 457 | $get_request_item_variable = preg_replace( '/_names/', '', $variable ); |
| 458 | |
| 459 | if ( ! isset( $get_request_item_variable ) ) { |
| 460 | return $results; |
| 461 | } |
| 462 | |
| 463 | foreach ( $request_items[ $get_request_item_variable ] as $key => $val ) { |
| 464 | switch ( $variable ) { |
| 465 | |
| 466 | case self::VARIABLE_ARGS: |
| 467 | case self::VARIABLE_REQUEST_COOKIES: |
| 468 | case self::VARIABLE_REQUEST_HEADERS: |
| 469 | if ( is_array( $val ) ) { |
| 470 | $parsed_vals = $this->parse_array( $key, $val ); |
| 471 | |
| 472 | foreach ( $parsed_vals as $key => $val ) { |
| 473 | $checked_request_item = $this->check_request_item_value( $waf_rule, $key, $val, $variable ); |
| 474 | |
| 475 | if ( $checked_request_item['is_matched'] ) { |
| 476 | $results = $this->get_rule_settings_and_results( $waf_rule, $request_items, $variable, $chain_items, $checked_request_item['match_string'] ); |
| 477 | break; |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | } else { |
| 482 | $checked_request_item = $this->check_request_item_value( $waf_rule, $key, $val, $variable ); |
| 483 | } |
| 484 | |
| 485 | break; |
| 486 | |
| 487 | case self::VARIABLE_ARGS_NAMES: |
| 488 | case self::VARIABLE_REQUEST_COOKIES_NAMES: |
| 489 | $checked_request_item = $this->check_request_item_key( $waf_rule, $key, $variable ); |
| 490 | break; |
| 491 | } |
| 492 | |
| 493 | if ( $checked_request_item['is_matched'] ) { |
| 494 | $results = $this->get_rule_settings_and_results( $waf_rule, $request_items, $variable, $chain_items, $checked_request_item['match_string'] ); |
| 495 | |
| 496 | break; |
| 497 | } |
| 498 | } |
| 499 | return $results; |
| 500 | } |
| 501 | |
| 502 | |
| 503 | |
| 504 | /** |
| 505 | * リクエスト� |
| 506 | 報� |
| 507 | �列のうちvalueの値を使用するルール判定 |
| 508 | * |
| 509 | * @param array $waf_rule |
| 510 | * @param string $request_items_key |
| 511 | * @param string $request_items_value |
| 512 | * @param string $variable |
| 513 | * @return array |
| 514 | */ |
| 515 | public function check_request_item_value( $waf_rule, $request_items_key, $request_items_value, $variable ): array { |
| 516 | $results['is_matched'] = false; |
| 517 | $matches = array(); |
| 518 | |
| 519 | // リクエスト� |
| 520 | 報� |
| 521 | �列のkeyとvalueの変換 |
| 522 | $tmp_key = $this->transform( $waf_rule['transformations'], $request_items_key ); |
| 523 | $tmp_val = $this->transform( $waf_rule['transformations'], $request_items_value ); |
| 524 | |
| 525 | if ( preg_match( '/' . $waf_rule['regex_pattern'] . '/s', $tmp_val, $matches ) ) { |
| 526 | if ( ! empty( $matches ) ) { |
| 527 | if ( false === $this->is_remove_variables( $waf_rule['remove_variables'], $variable, $tmp_key ) ) { |
| 528 | // 除外の設定が無ければマッチしたと判定 |
| 529 | $results['is_matched'] = true; |
| 530 | $results['match_string'] = $matches[0]; |
| 531 | } |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | return $results; |
| 536 | } |
| 537 | |
| 538 | |
| 539 | /** |
| 540 | * リクエスト� |
| 541 | 報� |
| 542 | �列のうちkeyの値を使用するルール判定 |
| 543 | * |
| 544 | * @param array $waf_rule |
| 545 | * @param string $request_items_key |
| 546 | * @param string $variable |
| 547 | * @return array |
| 548 | */ |
| 549 | public function check_request_item_key( $waf_rule, $request_items_key, $variable ): array { |
| 550 | $results['is_matched'] = false; |
| 551 | $matches = array(); |
| 552 | |
| 553 | // リクエスト� |
| 554 | 報� |
| 555 | �列のkeyの変換 |
| 556 | $tmp_key = $this->transform( $waf_rule['transformations'], $request_items_key ); |
| 557 | |
| 558 | if ( preg_match( '/' . $waf_rule['regex_pattern'] . '/s', $tmp_key, $matches ) ) { |
| 559 | if ( ! empty( $matches ) ) { |
| 560 | if ( false === $this->is_remove_variables( $waf_rule['remove_variables'], $variable, $tmp_key ) ) { |
| 561 | // 除外の設定が無ければマッチしたと判定 |
| 562 | $results['is_matched'] = true; |
| 563 | $results['match_string'] = $matches[0]; |
| 564 | } |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | return $results; |
| 569 | } |
| 570 | |
| 571 | |
| 572 | /** |
| 573 | * リクエスト� |
| 574 | 報� |
| 575 | �列のうち文字列の値を使用するルール判定 |
| 576 | * |
| 577 | * @param array $waf_rule |
| 578 | * @param array $request_items |
| 579 | * @param string $variable |
| 580 | * @param array $chain_items |
| 581 | * @return array |
| 582 | */ |
| 583 | public function check_request_item_strings( $waf_rule, $request_items, $variable, $chain_items ): array { |
| 584 | $results = array( |
| 585 | 'is_matched' => false, |
| 586 | 'chain_items' => array(), |
| 587 | 'skip' => 0, |
| 588 | 'skipafter' => '', |
| 589 | 'match_results' => array(), |
| 590 | ); |
| 591 | |
| 592 | if ( empty( $request_items[ $variable ] ) ) { |
| 593 | return $results; |
| 594 | } |
| 595 | |
| 596 | if ( $variable === self::VARIABLE_XML ) { |
| 597 | if ( $request_items[ self::VARIABLE_XML ] === 'xml_parse_failed' ) { |
| 598 | return $results; |
| 599 | } else { |
| 600 | $request_items[ self::VARIABLE_XML ] = str_replace( 'xml_parse_failed', '', $request_items[ self::VARIABLE_XML ] ); |
| 601 | } |
| 602 | } |
| 603 | |
| 604 | // リクエスト� |
| 605 | 報の変換 |
| 606 | $tmp_string = $this->transform( $waf_rule['transformations'], $request_items[ $variable ] ); |
| 607 | |
| 608 | // REQUEST_FILENAMEに関しては、urlデコード済の値も判定し、マッチしたら結果を出力 |
| 609 | if ( $variable === self::VARIABLE_REQUEST_FILENAME ) { |
| 610 | // リクエスト� |
| 611 | 報のデコード&変換 |
| 612 | $request_items_urldecoded = urldecode( $request_items[ $variable ] ); |
| 613 | $tmp_urldecoded = $this->transform( $waf_rule['transformations'], $request_items_urldecoded ); |
| 614 | |
| 615 | if ( preg_match( '/' . $waf_rule['regex_pattern'] . '/s', $tmp_urldecoded, $matches ) ) { |
| 616 | if ( ! empty( $matches ) ) { |
| 617 | $results = $this->get_rule_settings_and_results( $waf_rule, $request_items, $variable, $chain_items, $matches[0] ); |
| 618 | return $results; |
| 619 | } |
| 620 | } |
| 621 | } |
| 622 | |
| 623 | if ( false === preg_match( '/' . $waf_rule['regex_pattern'] . '/s', $tmp_string, $matches ) ) { |
| 624 | // preg_matchが失敗したときは終了 |
| 625 | return $results; |
| 626 | } |
| 627 | |
| 628 | if ( empty( $matches ) ) { |
| 629 | // 正規表現パターンにマッチしなければ終了 |
| 630 | return $results; |
| 631 | } |
| 632 | |
| 633 | $results = $this->get_rule_settings_and_results( $waf_rule, $request_items, $variable, $chain_items, $matches[0] ); |
| 634 | |
| 635 | return $results; |
| 636 | } |
| 637 | |
| 638 | public function waf_engine( $waf_rules, $locationmatch_rules, $available_rules ) { |
| 639 | $request_items = $this->get_request_items(); |
| 640 | |
| 641 | $locationmatch_removed_rule_ids = $this->locationmatch_remove_rules( $locationmatch_rules, $_SERVER['REQUEST_URI'] ?? '' ); |
| 642 | $skip = 0; |
| 643 | $skipafter = ''; |
| 644 | $chain_items = array(); |
| 645 | |
| 646 | foreach ( $waf_rules as $waf_rule ) { |
| 647 | // 前回マッチしたルールからskipの設定を引き継いでいる場合はスキップ |
| 648 | if ( $this->is_skip_enabled( $skip ) ) { |
| 649 | $skip--; |
| 650 | continue; |
| 651 | } |
| 652 | |
| 653 | // 前回マッチしたルールからskipafterの設定を引き継いでいる場合は現在のルールIDと比較し、一致するまでスキップ |
| 654 | // ルールIDの比較結果が同じの場合は、$skipafterを初期化して次のルールから判定を行う |
| 655 | if ( $this->is_skipafter_enabled( $skipafter ) ) { |
| 656 | if ( $skipafter !== $waf_rule['id'] ) { |
| 657 | continue; |
| 658 | } else { |
| 659 | $skipafter = ''; |
| 660 | continue; |
| 661 | } |
| 662 | } |
| 663 | |
| 664 | // LocationMatchによるルールの除外があるか確認。ある場合は現在のルールIDと比較し、一致する場合はスキップ |
| 665 | if ( ! empty( $locationmatch_removed_rule_ids ) ) { |
| 666 | if ( in_array( $waf_rule['id'], $locationmatch_removed_rule_ids, true ) ) { |
| 667 | continue; |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | // ルールにvariables設定がない場合、skip,akipafterの設定を確認して次のルール判定へ |
| 672 | if ( empty( $waf_rule['variables'] ) ) { |
| 673 | $skip = $this->check_skip( $waf_rule['skip'] ); |
| 674 | $skipafter = $this->check_skipafter( $waf_rule['skipafter'] ); |
| 675 | continue; |
| 676 | } |
| 677 | |
| 678 | foreach ( $waf_rule['variables'] as $variable ) { |
| 679 | switch ( $variable ) { |
| 680 | case self::VARIABLE_ARGS: |
| 681 | $results = $this->check_request_item_array( $waf_rule, $request_items, self::VARIABLE_ARGS, $chain_items ); |
| 682 | break; |
| 683 | |
| 684 | case self::VARIABLE_ARGS_NAMES: |
| 685 | $results = $this->check_request_item_array( $waf_rule, $request_items, self::VARIABLE_ARGS_NAMES, $chain_items ); |
| 686 | break; |
| 687 | |
| 688 | case self::VARIABLE_REQUEST_COOKIES: |
| 689 | $results = $this->check_request_item_array( $waf_rule, $request_items, self::VARIABLE_REQUEST_COOKIES, $chain_items ); |
| 690 | break; |
| 691 | |
| 692 | case self::VARIABLE_REQUEST_COOKIES_NAMES: |
| 693 | $results = $this->check_request_item_array( $waf_rule, $request_items, self::VARIABLE_REQUEST_COOKIES_NAMES, $chain_items ); |
| 694 | break; |
| 695 | |
| 696 | case self::VARIABLE_REQUEST_HEADERS: |
| 697 | $results = $this->check_request_item_array( $waf_rule, $request_items, self::VARIABLE_REQUEST_HEADERS, $chain_items ); |
| 698 | break; |
| 699 | |
| 700 | case self::VARIABLE_REQUEST_FILENAME: |
| 701 | $results = $this->check_request_item_strings( $waf_rule, $request_items, self::VARIABLE_REQUEST_FILENAME, $chain_items ); |
| 702 | break; |
| 703 | |
| 704 | case self::VARIABLE_XML: |
| 705 | $results = $this->check_request_item_strings( $waf_rule, $request_items, self::VARIABLE_XML, $chain_items ); |
| 706 | break; |
| 707 | } |
| 708 | |
| 709 | $is_matched = $results['is_matched']; |
| 710 | |
| 711 | if ( $is_matched ) { |
| 712 | $skip = $results['skip']; |
| 713 | $skipafter = $results['skipafter']; |
| 714 | $chain_items = $results['chain_items']; |
| 715 | $match_results = $results['match_results']; |
| 716 | |
| 717 | // マッチしたが、chain,skip,skipafterの設定がある場合は次のルール判定へ |
| 718 | if ( ! empty( $chain_items ) || 0 < $skip || ! empty( $skipafter ) ) { |
| 719 | break; |
| 720 | } |
| 721 | |
| 722 | // マッチしたが、除外設定されているルールの場合は値を保持して次のルール判定へ |
| 723 | if ( ( $waf_rule['attack'] & $available_rules ) === 0 ) { |
| 724 | $tmp_match_results = $match_results; |
| 725 | break; |
| 726 | } |
| 727 | |
| 728 | // マッチした結果がある場合は終了処理へ（ログ記述、通知、画面表示） |
| 729 | if ( ! empty( $match_results ) ) { |
| 730 | $match_results['is_deny'] = true; |
| 731 | $match_results['is_write_log'] = true; |
| 732 | |
| 733 | return $match_results; |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | $chain_items = array(); |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | if ( ! empty( $tmp_match_results ) ) { |
| 742 | $match_results = $tmp_match_results; |
| 743 | $match_results['is_deny'] = false; |
| 744 | $match_results['is_write_log'] = true; |
| 745 | |
| 746 | } else { |
| 747 | $match_results['is_deny'] = false; |
| 748 | $match_results['is_write_log'] = false; |
| 749 | } |
| 750 | |
| 751 | return $match_results; |
| 752 | } |
| 753 | } |
| 754 |