| @@ -1,217 +1,746 @@ | ||
| 1 | -<?php | |
| 2 | - | |
| 3 | -// Do not allow the file to be called directly. | |
| 4 | -if ( ! defined( 'ABSPATH' ) ) { | |
| 5 | - exit; | |
| 6 | -} | |
| 7 | - | |
| 8 | -/** | |
| 9 | - * This class provides the firewall functionality. | |
| 10 | - */ | |
| 11 | -class P_Firewall extends P_Core { | |
| 12 | - | |
| 13 | - /** | |
| 14 | - * Launch the firewall rule processor. | |
| 15 | - * | |
| 16 | - * @param bool $from_main Whether or not the firewall is loaded from the main script or not. | |
| 17 | - * @param Patchstack $core | |
| 18 | - * @param bool $skip Whether or not to process and execute the rules. | |
| 19 | - * @param bool $muCall Whether or not this was called from mu-plugin. | |
| 20 | - * @return void | |
| 21 | - */ | |
| 22 | - public function __construct( $from_main = false, $core = null, $skip = false, $muCall = false ) { | |
| 23 | - if ( ! $from_main || ! $core ) { | |
| 24 | - if ( $core ) { | |
| 25 | - parent::__construct( $core ); | |
| 26 | - } | |
| 27 | - return; | |
| 28 | - } | |
| 29 | - | |
| 30 | - parent::__construct( $core ); | |
| 31 | - | |
| 32 | - // If we only want to initialize the firewall but not execute the rules. | |
| 33 | - if ( $skip || defined( 'DOING_CRON' ) ) { | |
| 34 | - return; | |
| 35 | - } | |
| 36 | - | |
| 37 | - // Load the extension. | |
| 38 | - require_once __DIR__ . '/../lib/patchstack/vendor/autoload.php'; | |
| 39 | - $extension = new Patchstack\Extensions\WordPress\Extension( | |
| 40 | - [ | |
| 41 | - 'patchstack_basic_firewall_roles' => $this->get_option( 'patchstack_basic_firewall_roles', [ 'administrator', 'editor', 'author' ] ), | |
| 42 | - 'patchstack_whitelist' => get_option( 'patchstack_whitelist', '' ) | |
| 43 | - ], | |
| 44 | - $this | |
| 45 | - ); | |
| 46 | - | |
| 47 | - // Initiate the firewall processor with our settings. | |
| 48 | - $firewall = new Patchstack\Processor( | |
| 49 | - $extension, | |
| 50 | - $this->decode_rule_option('patchstack_firewall_rules_v3'), | |
| 51 | - $this->decode_rule_option('patchstack_whitelist_rules_v3'), | |
| 52 | - [ | |
| 53 | - 'autoblockAttempts' => $this->get_option( 'patchstack_autoblock_attempts', 10 ), | |
| 54 | - 'autoblockMinutes' => $this->get_option( 'patchstack_autoblock_minutes', 30 ), | |
| 55 | - 'autoblockTime' => $this->get_option( 'patchstack_autoblock_blocktime', 60 ), | |
| 56 | - 'whitelistKeysRules' => $this->decode_rule_option( 'patchstack_whitelist_keys_rules' ), | |
| 57 | - 'mustUsePluginCall' => $muCall | |
| 58 | - ], | |
| 59 | - $this->decode_rule_option('patchstack_firewall_rules'), | |
| 60 | - $this->decode_rule_option('patchstack_whitelist_rules') | |
| 61 | - ); | |
| 62 | - | |
| 63 | - // Launch the firewall. | |
| 64 | - $firewall->launch(); | |
| 65 | - } | |
| 66 | - | |
| 67 | - /** | |
| 68 | - * Safely decode a stored rule option into an array. The option is expected to be | |
| 69 | - * a JSON string, but may already be an array (or a malformed value); passing a | |
| 70 | - * non-string to json_decode() is a fatal TypeError on PHP 8. | |
| 71 | - * | |
| 72 | - * @param string $name | |
| 73 | - * @return array | |
| 74 | - */ | |
| 75 | - private function decode_rule_option( $name ) { | |
| 76 | - $value = get_option( $name, '[]' ); | |
| 77 | - | |
| 78 | - if ( is_array( $value ) ) { | |
| 79 | - return $value; | |
| 80 | - } | |
| 81 | - | |
| 82 | - if ( ! is_string( $value ) ) { | |
| 83 | - return []; | |
| 84 | - } | |
| 85 | - | |
| 86 | - $decoded = json_decode( $value, true ); | |
| 87 | - return is_array( $decoded ) ? $decoded : []; | |
| 88 | - } | |
| 89 | - | |
| 90 | - /** | |
| 91 | - * Determine if the user is authenticated and in the list of whitelisted roles. | |
| 92 | - * | |
| 93 | - * @return bool | |
| 94 | - */ | |
| 95 | - public function is_authenticated() { | |
| 96 | - if ( ! is_user_logged_in() ) { | |
| 97 | - return false; | |
| 98 | - } | |
| 99 | - | |
| 100 | - // Get the whitelisted roles. | |
| 101 | - $roles = $this->get_option( 'patchstack_basic_firewall_roles', [ 'administrator', 'editor', 'author' ] ); | |
| 102 | - if ( ! is_array( $roles ) ) { | |
| 103 | - return false; | |
| 104 | - } | |
| 105 | - | |
| 106 | - // Special scenario for super admins on a multisite environment. | |
| 107 | - if ( in_array( 'administrator', $roles ) && is_multisite() && is_super_admin() ) { | |
| 108 | - return true; | |
| 109 | - } | |
| 110 | - | |
| 111 | - // Get the roles of the user. | |
| 112 | - $user = wp_get_current_user(); | |
| 113 | - if ( ! isset( $user->roles ) || count( (array) $user->roles ) == 0 ) { | |
| 114 | - return false; | |
| 115 | - } | |
| 116 | - | |
| 117 | - // Is the user in the whitelist roles list? | |
| 118 | - $role_count = array_intersect( $user->roles, $roles ); | |
| 119 | - return count( $role_count ) != 0; | |
| 120 | - } | |
| 121 | - | |
| 122 | - /** | |
| 123 | - * Display error page. | |
| 124 | - * | |
| 125 | - * @param integer $fid | |
| 126 | - * @return void | |
| 127 | - */ | |
| 128 | - public function display_error_page( $fid = 1 ) { | |
| 129 | - if ( $fid != 22 && $fid != 23 && $fid != 24 && $fid != 'login' ) { | |
| 130 | - $this->log_request( $fid ); | |
| 131 | - } | |
| 132 | - | |
| 133 | - // Supported by a number of popular caching plugins. | |
| 134 | - if ( ! defined( 'DONOTCACHEPAGE' ) ) { | |
| 135 | - define( 'DONOTCACHEPAGE', true ); | |
| 136 | - } | |
| 137 | - | |
| 138 | - // Because WP Fastest Cache just has to be special... | |
| 139 | - if (function_exists('wpfc_exclude_current_page')) { | |
| 140 | - @wpfc_exclude_current_page(); | |
| 141 | - } | |
| 142 | - | |
| 143 | - // Send forbidden headers and no-caching headers as well. | |
| 144 | - status_header(403); | |
| 145 | - send_nosniff_header(); | |
| 146 | - nocache_headers(); | |
| 147 | - | |
| 148 | - if ( $fid == 'login' ) { | |
| 149 | - require_once dirname( __FILE__ ) . '/views/access-denied-login.php'; | |
| 150 | - } else { | |
| 151 | - require_once dirname( __FILE__ ) . '/views/access-denied.php'; | |
| 152 | - } | |
| 153 | - | |
| 154 | - exit; | |
| 155 | - } | |
| 156 | - | |
| 157 | - /** | |
| 158 | - * Log the blocked request. | |
| 159 | - * | |
| 160 | - * @param int $fid | |
| 161 | - * @return void | |
| 162 | - */ | |
| 163 | - private function log_request( $fid = 1 ) { | |
| 164 | - global $wpdb; | |
| 165 | - if ( ! $wpdb || $fid == 22 || $fid == 23 || $fid == 24 || $fid == 'login' ) { | |
| 166 | - return; | |
| 167 | - } | |
| 168 | - | |
| 169 | - // Insert into the logs. | |
| 170 | - $wpdb->insert( | |
| 171 | - $wpdb->prefix . 'patchstack_firewall_log', | |
| 172 | - array( | |
| 173 | - 'ip' => $this->get_ip(), | |
| 174 | - 'request_uri' => isset( $_SERVER['REQUEST_URI'] ) ? $_SERVER['REQUEST_URI'] : '', | |
| 175 | - 'user_agent' => isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT'] : '', | |
| 176 | - 'method' => isset( $_SERVER['REQUEST_METHOD'] ) ? $_SERVER['REQUEST_METHOD'] : '', | |
| 177 | - 'fid' => $fid, | |
| 178 | - 'flag' => '', | |
| 179 | - 'post_data' => '', | |
| 180 | - 'block_type' => 'BLOCK', | |
| 181 | - ) | |
| 182 | - ); | |
| 183 | - } | |
| 184 | - | |
| 185 | - /** | |
| 186 | - * Extract the number of blocked hits the past 30 days based on the current counters. | |
| 187 | - * | |
| 188 | - * @return int | |
| 189 | - */ | |
| 190 | - public function get_hits_counter() { | |
| 191 | - $counters = get_option( 'patchstack_hits_last_30', [] ); | |
| 192 | - if (!is_array($counters) || count($counters) === 0) { | |
| 193 | - return 0; | |
| 194 | - } | |
| 195 | - | |
| 196 | - // Set the range of dates we need. | |
| 197 | - $hits = 0; | |
| 198 | - $start = new \DateTime(); | |
| 199 | - $start->modify('-30 days'); | |
| 200 | - | |
| 201 | - $end = new \DateTime(); | |
| 202 | - $end->modify('+1 day'); | |
| 203 | - | |
| 204 | - $interval = new \DateInterval('P1D'); | |
| 205 | - $range = new \DatePeriod($start, $interval, $end); | |
| 206 | - | |
| 207 | - // Set the range from -6 days to +1 day from now. | |
| 208 | - foreach ($range as $date) { | |
| 209 | - $formattedDate = $date->format('Y-m-d'); | |
| 210 | - if (isset($counters[$formattedDate])) { | |
| 211 | - $hits += $counters[$formattedDate]; | |
| 212 | - } | |
| 213 | - } | |
| 214 | - | |
| 215 | - return $hits; | |
| 216 | - } | |
| 217 | -} | |
| 1 | +<?php | |
| 2 | + | |
| 3 | +// Do not allow the file to be called directly. | |
| 4 | +if ( ! defined( 'ABSPATH' ) ) { | |
| 5 | + exit; | |
| 6 | +} | |
| 7 | + | |
| 8 | +/** | |
| 9 | + * This class provides the firewall functionality. | |
| 10 | + */ | |
| 11 | +class P_Firewall extends P_Core { | |
| 12 | + | |
| 13 | + /** | |
| 14 | + * Parse the firewall and whitelist rules and determine if it's valid. | |
| 15 | + * Then set the types with all server/client variables and launch the processor. | |
| 16 | + * | |
| 17 | + * @param bool $from_main Whether or not the firewall is loaded from the main script or not. | |
| 18 | + * @param Patchstack $core | |
| 19 | + * @param bool $skip Whether or not to process and execute the rules. | |
| 20 | + * @return void | |
| 21 | + */ | |
| 22 | + public function __construct( $from_main = false, $core = null, $skip = false ) { | |
| 23 | + if ( ! $from_main || ! $core ) { | |
| 24 | + if ( $core ) { | |
| 25 | + parent::__construct( $core ); | |
| 26 | + } | |
| 27 | + return; | |
| 28 | + } | |
| 29 | + | |
| 30 | + parent::__construct( $core ); | |
| 31 | + | |
| 32 | + // If we only want to initialize the firewall but not execute the rules. | |
| 33 | + if ( $skip ) { | |
| 34 | + return; | |
| 35 | + } | |
| 36 | + | |
| 37 | + // Process the firewall rules. | |
| 38 | + $this->processor(); | |
| 39 | + } | |
| 40 | + | |
| 41 | + /** | |
| 42 | + * Check the custom whitelist rules defined in the backend of WordPress | |
| 43 | + * and attempt to match it with the request. | |
| 44 | + * | |
| 45 | + * @return boolean | |
| 46 | + */ | |
| 47 | + private function is_custom_whitelisted() { | |
| 48 | + $whitelist = str_replace( '<?php exit; ?>', '', get_option( 'patchstack_custom_whitelist_rules', '' ) ); | |
| 49 | + if ( empty( $whitelist ) ) { | |
| 50 | + return false; | |
| 51 | + } | |
| 52 | + | |
| 53 | + // Loop through all lines. | |
| 54 | + $lines = explode( "\n", $whitelist ); | |
| 55 | + $ip = $this->get_ip(); | |
| 56 | + | |
| 57 | + foreach ( $lines as $line ) { | |
| 58 | + $t = explode( ':', $line ); | |
| 59 | + | |
| 60 | + if ( count( $t ) == 2 ) { | |
| 61 | + $val = strtolower( trim( $t[1] ) ); | |
| 62 | + switch ( strtolower( $t[0] ) ) { | |
| 63 | + // IP address match. | |
| 64 | + case 'ip': | |
| 65 | + if ( $ip == $val ) { | |
| 66 | + return true; | |
| 67 | + } | |
| 68 | + break; | |
| 69 | + // Payload match. | |
| 70 | + case 'payload': | |
| 71 | + if ( count( $_POST ) > 0 && strpos( strtolower( print_r( $_POST, true ) ), $val ) !== false ) { | |
| 72 | + return true; | |
| 73 | + } | |
| 74 | + | |
| 75 | + if ( count( $_GET ) > 0 && strpos( strtolower( print_r( $_GET, true ) ), $val ) !== false ) { | |
| 76 | + return true; | |
| 77 | + } | |
| 78 | + break; | |
| 79 | + // URL match. | |
| 80 | + case 'url': | |
| 81 | + if ( strpos( strtolower( $_SERVER['REQUEST_URI'] ), $val ) !== false ) { | |
| 82 | + return true; | |
| 83 | + } | |
| 84 | + break; | |
| 85 | + } | |
| 86 | + } | |
| 87 | + } | |
| 88 | + | |
| 89 | + return false; | |
| 90 | + } | |
| 91 | + | |
| 92 | + /** | |
| 93 | + * Determine if the request should be whitelisted. | |
| 94 | + * | |
| 95 | + * @return boolean | |
| 96 | + */ | |
| 97 | + private function is_whitelisted() { | |
| 98 | + // First check if the user has custom whitelist rules configured. | |
| 99 | + if ( $this->is_custom_whitelisted() ) { | |
| 100 | + return true; | |
| 101 | + } | |
| 102 | + | |
| 103 | + // Load the whitelist. | |
| 104 | + $whitelists = get_option( 'patchstack_whitelist_rules', '' ); | |
| 105 | + if ( $whitelists == null || $whitelists == '' ) { | |
| 106 | + return false; | |
| 107 | + } | |
| 108 | + | |
| 109 | + // Parse the whitelist. | |
| 110 | + $whitelists = json_decode( str_replace( '<?php exit; ?>', '', $whitelists ), true ); | |
| 111 | + | |
| 112 | + // Grab visitor's IP address and request data. | |
| 113 | + $client_ip = $this->get_ip(); | |
| 114 | + $requests = $this->capture_request(); | |
| 115 | + | |
| 116 | + foreach ( $whitelists as $whitelist ) { | |
| 117 | + $whitelist_rule = json_decode( $whitelist['rule'] ); | |
| 118 | + $matched_rules = 0; | |
| 119 | + | |
| 120 | + // If matches on all request methods, only 1 rule match is required to whitelist. | |
| 121 | + if ( $whitelist_rule->method === 'ALL' ) { | |
| 122 | + $count_rules = 1; | |
| 123 | + } else { | |
| 124 | + if ( ! is_null( $whitelist_rule ) ) { | |
| 125 | + $count_rules = $whitelist_rule->rules; | |
| 126 | + $count_rules = $this->count_rules( $count_rules ); | |
| 127 | + } | |
| 128 | + } | |
| 129 | + | |
| 130 | + // If an IP address match is given, determine if it matches. | |
| 131 | + $ip = isset( $whitelist_rule->rules, $whitelist_rule->rules->ip_address ) ? $whitelist_rule->rules->ip_address : null; | |
| 132 | + if ( ! is_null( $ip ) ) { | |
| 133 | + if ( strpos( $ip, '*' ) !== false ) { | |
| 134 | + $whitelisted_ip = $this->plugin->ban->check_wildcard_rule( $client_ip, $ip ); | |
| 135 | + } elseif ( strpos( $ip, '-' ) !== false ) { | |
| 136 | + $whitelisted_ip = $this->plugin->ban->check_range_rule( $client_ip, $ip ); | |
| 137 | + } elseif ( strpos( $ip, '/' ) !== false ) { | |
| 138 | + $whitelisted_ip = $this->plugin->ban->check_subnet_mask_rule( $client_ip, $ip ); | |
| 139 | + } elseif ( $client_ip == $ip ) { | |
| 140 | + $whitelisted_ip = true; | |
| 141 | + } else { | |
| 142 | + $whitelisted_ip = false; | |
| 143 | + } | |
| 144 | + } else { | |
| 145 | + $whitelisted_ip = true; | |
| 146 | + } | |
| 147 | + | |
| 148 | + foreach ( $requests as $key => $request ) { | |
| 149 | + | |
| 150 | + // Treat the raw POST data string as the body contents of all values combined. | |
| 151 | + if ( $key == 'rulesRawPost' ) { | |
| 152 | + $key = 'rulesBodyAll'; | |
| 153 | + } | |
| 154 | + | |
| 155 | + if ( $whitelist_rule->method == $requests['method'] || $whitelist_rule->method == 'ALL' ) { | |
| 156 | + $test = strtolower( preg_replace( '/(?!^)[A-Z]{2,}(?=[A-Z][a-z])|[A-Z][a-z]/', '->$0', $key ) ); | |
| 157 | + $rule = array_reduce( | |
| 158 | + explode( '->', $test ), | |
| 159 | + function ( $o, $p ) { | |
| 160 | + if ( ! isset( $o->$p ) ) { | |
| 161 | + return null; | |
| 162 | + } | |
| 163 | + | |
| 164 | + return $o->$p; | |
| 165 | + }, | |
| 166 | + $whitelist_rule | |
| 167 | + ); | |
| 168 | + | |
| 169 | + if ( ! is_null( $rule ) && substr( $key, 0, 4 ) == 'rule' && $this->is_rule_match( $rule, $request ) ) { | |
| 170 | + $matched_rules++; | |
| 171 | + } | |
| 172 | + } | |
| 173 | + } | |
| 174 | + | |
| 175 | + if ( $matched_rules >= $count_rules && $whitelisted_ip ) { | |
| 176 | + return true; | |
| 177 | + } | |
| 178 | + } | |
| 179 | + | |
| 180 | + return false; | |
| 181 | + } | |
| 182 | + | |
| 183 | + /** | |
| 184 | + * Retrieve all HTTP headers that start with HTTP_. | |
| 185 | + * | |
| 186 | + * @return array | |
| 187 | + */ | |
| 188 | + private function get_headers() { | |
| 189 | + $headers = array(); | |
| 190 | + foreach ( $_SERVER as $name => $value ) { | |
| 191 | + if ( substr( $name, 0, 5 ) == 'HTTP_' ) { | |
| 192 | + $headers[ str_replace( ' ', '-', ucwords( strtolower( str_replace( '_', ' ', substr( $name, 5 ) ) ) ) ) ] = $value; | |
| 193 | + } | |
| 194 | + } | |
| 195 | + | |
| 196 | + return $headers; | |
| 197 | + } | |
| 198 | + | |
| 199 | + /** | |
| 200 | + * Retrieve information about any file uploads. | |
| 201 | + * | |
| 202 | + * @return array | |
| 203 | + */ | |
| 204 | + private function get_file_upload_data() { | |
| 205 | + if ( ! is_array( $_FILES ) || count( $_FILES ) == 0 ) { | |
| 206 | + return ''; | |
| 207 | + } | |
| 208 | + | |
| 209 | + // Extract the information we need from $_FILES. | |
| 210 | + $return = array(); | |
| 211 | + foreach ( $_FILES as $key => $data ) { | |
| 212 | + foreach ( $data as $key2 => $data2 ) { | |
| 213 | + | |
| 214 | + // We only want the name and type. | |
| 215 | + if ( ! in_array( $key2, array( 'name', 'type' ) ) ) { | |
| 216 | + continue; | |
| 217 | + } | |
| 218 | + | |
| 219 | + if ( ! is_array( $data2 ) ) { | |
| 220 | + $return[] = $key2 . '=' . $data2; | |
| 221 | + } else { | |
| 222 | + $return[] = $key2 . '=' . @$this->multi_implode( $data2, '&' . $key2 . '=' ); | |
| 223 | + } | |
| 224 | + } | |
| 225 | + } | |
| 226 | + | |
| 227 | + return implode( '&', $return ); | |
| 228 | + } | |
| 229 | + | |
| 230 | + | |
| 231 | + /** | |
| 232 | + * Returns all request methods and parameters | |
| 233 | + * | |
| 234 | + * @return string | |
| 235 | + */ | |
| 236 | + private function capture_request() { | |
| 237 | + $data = $this->capture_keys(); | |
| 238 | + | |
| 239 | + // Get the method and URL. | |
| 240 | + $method = $_SERVER['REQUEST_METHOD']; | |
| 241 | + $rulesUri = $_SERVER['REQUEST_URI']; | |
| 242 | + | |
| 243 | + // Store the header values in different formats. | |
| 244 | + $rulesHeadersKeys = array(); | |
| 245 | + $rulesHeadersValues = array(); | |
| 246 | + $rulesHeadersCombinations = array(); | |
| 247 | + | |
| 248 | + // Retrieve the headers. | |
| 249 | + $headers = $this->get_headers(); | |
| 250 | + $rulesHeadersAll = implode( ' ', $headers ); | |
| 251 | + foreach ( $headers as $name => $value ) { | |
| 252 | + $rulesHeadersKeys[] = $name; | |
| 253 | + $rulesHeadersValues[] = $value; | |
| 254 | + $rulesHeadersCombinations[] = $name . ': ' . $value; | |
| 255 | + } | |
| 256 | + | |
| 257 | + // Store the $_POST values in different formats. | |
| 258 | + $rulesBodyKeys = array(); | |
| 259 | + $rulesBodyValues = array(); | |
| 260 | + $rulesBodyCombinations = array(); | |
| 261 | + | |
| 262 | + // Retrieve the $_POST values. | |
| 263 | + $rulesBodyAll = urldecode( http_build_query( $data['POST'] ) ); | |
| 264 | + foreach ( $data['POST'] as $key => $value ) { | |
| 265 | + if ( is_array( $value ) ) { | |
| 266 | + $value = @$this->multi_implode( $value, ' ' ); | |
| 267 | + } | |
| 268 | + $rulesBodyKeys[] = $key; | |
| 269 | + $rulesBodyValues[] = $value; | |
| 270 | + $rulesBodyCombinations[] = $key . '=' . $value; | |
| 271 | + } | |
| 272 | + | |
| 273 | + // Store the $_GET values in different formats. | |
| 274 | + $rulesParamsKeys = array(); | |
| 275 | + $rulesParamsValues = array(); | |
| 276 | + $rulesParamsCombinations = array(); | |
| 277 | + | |
| 278 | + // Retrieve the $_GET values. | |
| 279 | + $rulesParamsAll = urldecode( http_build_query( $data['GET'] ) ); | |
| 280 | + foreach ( $data['GET'] as $key => $value ) { | |
| 281 | + if ( is_array( $value ) ) { | |
| 282 | + $value = @$this->multi_implode( $value, ' ' ); | |
| 283 | + } | |
| 284 | + $rulesParamsKeys[] = $key; | |
| 285 | + $rulesParamsValues[] = $value; | |
| 286 | + $rulesParamsCombinations[] = $key . '=' . $value; | |
| 287 | + } | |
| 288 | + | |
| 289 | + // Raw POST data. | |
| 290 | + $rulesRawPost = @file_get_contents( 'php://input' ); | |
| 291 | + | |
| 292 | + // Data about file uploads. | |
| 293 | + $rulesFile = $this->get_file_upload_data(); | |
| 294 | + | |
| 295 | + // Return each value as its own array. | |
| 296 | + return compact( | |
| 297 | + 'method', | |
| 298 | + 'rulesFile', | |
| 299 | + 'rulesRawPost', | |
| 300 | + 'rulesUri', | |
| 301 | + 'rulesHeadersAll', | |
| 302 | + 'rulesHeadersKeys', | |
| 303 | + 'rulesHeadersValues', | |
| 304 | + 'rulesHeadersCombinations', | |
| 305 | + 'rulesBodyAll', | |
| 306 | + 'rulesBodyKeys', | |
| 307 | + 'rulesBodyValues', | |
| 308 | + 'rulesBodyCombinations', | |
| 309 | + 'rulesParamsAll', | |
| 310 | + 'rulesParamsKeys', | |
| 311 | + 'rulesParamsValues', | |
| 312 | + 'rulesParamsCombinations' | |
| 313 | + ); | |
| 314 | + } | |
| 315 | + | |
| 316 | + /** | |
| 317 | + * Capture the keys of the request. | |
| 318 | + * | |
| 319 | + * @return array | |
| 320 | + */ | |
| 321 | + private function capture_keys() { | |
| 322 | + // Data we want to go through. | |
| 323 | + $data = array( | |
| 324 | + 'POST' => $_POST, | |
| 325 | + 'GET' => $_GET, | |
| 326 | + ); | |
| 327 | + | |
| 328 | + // Determine if there are any keys we should remove from the data set. | |
| 329 | + if ( get_option( 'patchstack_whitelist_keys_rules', '' ) == '' ) { | |
| 330 | + return $data; | |
| 331 | + } | |
| 332 | + | |
| 333 | + // Must be valid JSON and decodes to at least 2 primary data arrays. | |
| 334 | + $keys = json_decode( get_option( 'patchstack_whitelist_keys_rules' ), true ); | |
| 335 | + if ( ! $keys || ! is_array( $keys ) || $keys && count( $keys ) < 2 ) { | |
| 336 | + return $data; | |
| 337 | + } | |
| 338 | + | |
| 339 | + // Remove the keys where necessary, go through all data types (GET, POST). | |
| 340 | + foreach ( $keys as $type => $entries ) { | |
| 341 | + | |
| 342 | + // Go through all whitelisted actions. | |
| 343 | + foreach ( $entries as $entry ) { | |
| 344 | + $t = explode( '.', $entry ); | |
| 345 | + | |
| 346 | + // For non-multidimensional array checks. | |
| 347 | + if ( count( $t ) == 1 ) { | |
| 348 | + // If the value itself exists. | |
| 349 | + if ( isset( $data[ $type ][ $t[0] ] ) ) { | |
| 350 | + unset( $data[ $type ][ $t[0] ] ); | |
| 351 | + } | |
| 352 | + | |
| 353 | + // For pattern checking. | |
| 354 | + if ( strpos( $t[0], '*' ) !== false ) { | |
| 355 | + $star = explode( '*', $t[0] ); | |
| 356 | + | |
| 357 | + // Loop through all $_POST, $_GET values. | |
| 358 | + foreach ( $data as $method => $values ) { | |
| 359 | + foreach ( $values as $key => $value ) { | |
| 360 | + if ( ! is_array( $value ) && strpos( $key, $star[0] ) !== false ) { | |
| 361 | + unset( $data[ $method ][ $key ] ); | |
| 362 | + } | |
| 363 | + } | |
| 364 | + } | |
| 365 | + } | |
| 366 | + continue; | |
| 367 | + } | |
| 368 | + | |
| 369 | + // For multidimensional array checks. | |
| 370 | + $end =& $data[ $type ]; | |
| 371 | + $skip = false; | |
| 372 | + foreach ( $t as $var ) { | |
| 373 | + if ( ! isset( $end[ $var ] ) ) { | |
| 374 | + $skip = true; | |
| 375 | + break; | |
| 376 | + } | |
| 377 | + $end =& $end[ $var ]; | |
| 378 | + } | |
| 379 | + | |
| 380 | + // Since we cannot unset it due to it being a reference variable, | |
| 381 | + // we just set it to an empty string instead. | |
| 382 | + if ( ! $skip ) { | |
| 383 | + $end = ''; | |
| 384 | + } | |
| 385 | + } | |
| 386 | + } | |
| 387 | + | |
| 388 | + return $data; | |
| 389 | + } | |
| 390 | + | |
| 391 | + /** | |
| 392 | + * Implode array recursively. | |
| 393 | + * | |
| 394 | + * @param $array | |
| 395 | + * @param $glue | |
| 396 | + * @return bool|string | |
| 397 | + */ | |
| 398 | + private function multi_implode( $array, $glue ) { | |
| 399 | + $ret = ''; | |
| 400 | + | |
| 401 | + foreach ( $array as $item ) { | |
| 402 | + if ( is_array( $item ) ) { | |
| 403 | + $ret .= $this->multi_implode( $item, $glue ) . $glue; | |
| 404 | + } else { | |
| 405 | + $ret .= $item . $glue; | |
| 406 | + } | |
| 407 | + } | |
| 408 | + | |
| 409 | + return substr( $ret, 0, 0 - strlen( $glue ) ); | |
| 410 | + } | |
| 411 | + | |
| 412 | + /** | |
| 413 | + * Determine if the request matches the given firewall or whitelist rule. | |
| 414 | + * | |
| 415 | + * @param string $rule | |
| 416 | + * @param string|array $request | |
| 417 | + * @return bool | |
| 418 | + */ | |
| 419 | + private function is_rule_match( $rule, $request ) { | |
| 420 | + $is_matched = false; | |
| 421 | + if ( is_array( $request ) ) { | |
| 422 | + foreach ( $request as $key => $value ) { | |
| 423 | + $is_matched = $this->is_rule_match( $rule, $value ); | |
| 424 | + if ( $is_matched ) { | |
| 425 | + return $is_matched; | |
| 426 | + } | |
| 427 | + } | |
| 428 | + } else { | |
| 429 | + return preg_match( $rule, urldecode( $request ) ); | |
| 430 | + } | |
| 431 | + | |
| 432 | + return $is_matched; | |
| 433 | + } | |
| 434 | + | |
| 435 | + /** | |
| 436 | + * Count the number of rules. | |
| 437 | + * | |
| 438 | + * @param array $array | |
| 439 | + * @return integer | |
| 440 | + */ | |
| 441 | + private function count_rules( $array ) { | |
| 442 | + $counter = 0; | |
| 443 | + if ( is_object( $array ) ) { | |
| 444 | + $array = (array) $array; | |
| 445 | + } | |
| 446 | + | |
| 447 | + if ( $array['uri'] ) { | |
| 448 | + $counter++; | |
| 449 | + } | |
| 450 | + | |
| 451 | + foreach ( array( 'body', 'params', 'headers' ) as $type ) { | |
| 452 | + foreach ( $array[ $type ] as $key => $value ) { | |
| 453 | + if ( ! is_null( $value ) ) { | |
| 454 | + $counter++; | |
| 455 | + } | |
| 456 | + } | |
| 457 | + } | |
| 458 | + | |
| 459 | + return $counter; | |
| 460 | + } | |
| 461 | + | |
| 462 | + /** | |
| 463 | + * Runs the firewall rules processor. | |
| 464 | + * | |
| 465 | + * @return void | |
| 466 | + */ | |
| 467 | + private function processor() { | |
| 468 | + // Load the firewall rules. | |
| 469 | + $rules = json_decode( get_option( 'patchstack_firewall_rules', '' ), true ); | |
| 470 | + if ( $rules == '' || is_null( $rules ) ) { | |
| 471 | + return; | |
| 472 | + } | |
| 473 | + | |
| 474 | + // Determine if the user is temporarily blocked from the site. | |
| 475 | + if ( $this->is_auto_ip_blocked() > $this->get_option( 'patchstack_autoblock_attempts', 10 ) && ! $this->is_authenticated() ) { | |
| 476 | + $this->display_error_page( 22 ); | |
| 477 | + } | |
| 478 | + | |
| 479 | + // Check for whitelist. | |
| 480 | + $is_whitelisted = $this->is_whitelisted(); | |
| 481 | + | |
| 482 | + // Obtain the IP address and request data. | |
| 483 | + $client_ip = $this->get_ip(); | |
| 484 | + $requests = $this->capture_request(); | |
| 485 | + | |
| 486 | + // Iterate through all root objects. | |
| 487 | + foreach ( $rules as $firewall_rule ) { | |
| 488 | + $blocked_count = 0; | |
| 489 | + $firewall_rule['bypass_whitelist'] = isset( $firewall_rule['bypass_whitelist'] ) ? $firewall_rule['bypass_whitelist'] : false; | |
| 490 | + | |
| 491 | + // Do we need to skip the whitelist for a particular rule? | |
| 492 | + if ( isset( $firewall_rule['bypass_whitelist'] ) && ! $firewall_rule['bypass_whitelist'] && $is_whitelisted ) { | |
| 493 | + continue; | |
| 494 | + } | |
| 495 | + | |
| 496 | + $rule_terms = json_decode( $firewall_rule['rule'] ); | |
| 497 | + | |
| 498 | + // Determine if we should match the IP address. | |
| 499 | + $ip = isset( $rule_terms->rules->ip_address ) ? $rule_terms->rules->ip_address : null; | |
| 500 | + if ( ! is_null( $ip ) ) { | |
| 501 | + $matched_ip = false; | |
| 502 | + if ( strpos( $ip, '*' ) !== false ) { | |
| 503 | + $matched_ip = $this->plugin->ban->check_wildcard_rule( $client_ip, $ip ); | |
| 504 | + } elseif ( strpos( $ip, '-' ) !== false ) { | |
| 505 | + $matched_ip = $this->plugin->ban->check_range_rule( $client_ip, $ip ); | |
| 506 | + } elseif ( strpos( $ip, '/' ) !== false ) { | |
| 507 | + $matched_ip = $this->plugin->ban->check_subnet_mask_rule( $client_ip, $ip ); | |
| 508 | + } elseif ( $client_ip == $ip ) { | |
| 509 | + $matched_ip = true; | |
| 510 | + } | |
| 511 | + | |
| 512 | + if ( ! $matched_ip ) { | |
| 513 | + continue; | |
| 514 | + } | |
| 515 | + } | |
| 516 | + | |
| 517 | + // If matches on all request methods, only 1 rule match is required to block | |
| 518 | + if ( $rule_terms->method === 'ALL' ) { | |
| 519 | + $count_rules = 1; | |
| 520 | + } else { | |
| 521 | + $count_rules = json_decode( json_encode( $rule_terms->rules ), true ); | |
| 522 | + $count_rules = $this->count_rules( $count_rules ); | |
| 523 | + } | |
| 524 | + | |
| 525 | + // Loop through all request data that we captured. | |
| 526 | + foreach ( $requests as $key => $request ) { | |
| 527 | + | |
| 528 | + // Treat the raw POST data string as the body contents of all values combined. | |
| 529 | + if ( $key == 'rulesRawPost' ) { | |
| 530 | + $key = 'rulesBodyAll'; | |
| 531 | + } | |
| 532 | + | |
| 533 | + // Determine if the requesting method matches. | |
| 534 | + if ( $rule_terms->method == $requests['method'] || $rule_terms->method == 'ALL' || $rule_terms->method == 'GET' || ( $rule_terms->method == 'FILES' && $this->is_file_upload() ) ) { | |
| 535 | + $test = strtolower( preg_replace( '/(?!^)[A-Z]{2,}(?=[A-Z][a-z])|[A-Z][a-z]/', '->$0', $key ) ); | |
| 536 | + $exp = explode( '->', $test ); | |
| 537 | + | |
| 538 | + // Determine if a rule exists for this request. | |
| 539 | + $rule = array_reduce( | |
| 540 | + $exp, | |
| 541 | + function ( $o, $p ) { | |
| 542 | + if ( ! isset( $o->$p ) ) { | |
| 543 | + return null; | |
| 544 | + } | |
| 545 | + | |
| 546 | + return $o->$p; | |
| 547 | + }, | |
| 548 | + $rule_terms | |
| 549 | + ); | |
| 550 | + | |
| 551 | + // Determine if the rule matches the request. | |
| 552 | + if ( ! is_null( $rule ) && substr( $key, 0, 4 ) == 'rule' && $this->is_rule_match( $rule, $request ) ) { | |
| 553 | + $blocked_count++; | |
| 554 | + } | |
| 555 | + } | |
| 556 | + } | |
| 557 | + | |
| 558 | + // Determine if the user should be blocked. | |
| 559 | + if ( $blocked_count >= $count_rules ) { | |
| 560 | + if ( $rule_terms->type == 'BLOCK' ) { | |
| 561 | + $this->block_user( $firewall_rule['id'], (bool) $firewall_rule['bypass_whitelist'] ); | |
| 562 | + } elseif ( $rule_terms->type == 'LOG' ) { | |
| 563 | + $this->log_user( $firewall_rule['id'] ); | |
| 564 | + } elseif ( $rule_terms->type == 'REDIRECT' ) { | |
| 565 | + $this->redirect_user( $firewall_rule['id'], $rule_terms->type_params ); | |
| 566 | + } | |
| 567 | + } | |
| 568 | + } | |
| 569 | + } | |
| 570 | + | |
| 571 | + /** | |
| 572 | + * Determine if the current request is a file upload. | |
| 573 | + * | |
| 574 | + * @return boolean | |
| 575 | + */ | |
| 576 | + private function is_file_upload() { | |
| 577 | + return isset( $_FILES ) && count( $_FILES ) > 0; | |
| 578 | + } | |
| 579 | + | |
| 580 | + /** | |
| 581 | + * Automatically block the user if there are many blocked requests in a short period of time. | |
| 582 | + * | |
| 583 | + * @return integer | |
| 584 | + */ | |
| 585 | + public function is_auto_ip_blocked() { | |
| 586 | + // Calculate block time. | |
| 587 | + $minutes = (int) $this->get_option( 'patchstack_autoblock_minutes', 30 ); | |
| 588 | + $timeout = (int) $this->get_option( 'patchstack_autoblock_blocktime', 60 ); | |
| 589 | + if ( empty( $minutes ) || empty( $timeout ) ) { | |
| 590 | + $time = 30 + 60; | |
| 591 | + } else { | |
| 592 | + $time = $minutes + $timeout; | |
| 593 | + } | |
| 594 | + | |
| 595 | + // Determine if the user should be blocked. | |
| 596 | + global $wpdb; | |
| 597 | + $results = $wpdb->get_results( | |
| 598 | + $wpdb->prepare( 'SELECT COUNT(*) as numIps FROM ' . $wpdb->prefix . "patchstack_firewall_log WHERE block_type = 'BLOCK' AND apply_ban = 1 AND ip = '%s' AND log_date >= ('" . current_time( 'mysql' ) . "' - INTERVAL %d MINUTE)", array( $this->get_ip(), $time ) ), | |
| 599 | + OBJECT | |
| 600 | + ); | |
| 601 | + | |
| 602 | + if ( ! isset( $results, $results[0], $results[0]->numIps ) ) { | |
| 603 | + return 0; | |
| 604 | + } | |
| 605 | + return $results[0]->numIps; | |
| 606 | + } | |
| 607 | + | |
| 608 | + /** | |
| 609 | + * Block the user, and log, do whatever is necessary. | |
| 610 | + * | |
| 611 | + * @param string $rule | |
| 612 | + * @param bool $bypass | |
| 613 | + * @return void | |
| 614 | + */ | |
| 615 | + private function block_user( $rule, $bypass = false ) { | |
| 616 | + if ( ! $this->is_authenticated( $bypass ) ) { | |
| 617 | + $this->display_error_page( '55' . intval( $rule ) ); | |
| 618 | + } | |
| 619 | + } | |
| 620 | + | |
| 621 | + /** | |
| 622 | + * Log the user action. | |
| 623 | + * | |
| 624 | + * @param string $rule | |
| 625 | + * @return void | |
| 626 | + */ | |
| 627 | + private function log_user( $rule ) { | |
| 628 | + $this->log_hacker( $rule, '', 'LOG' ); | |
| 629 | + } | |
| 630 | + | |
| 631 | + /** | |
| 632 | + * Log the user action and redirect. | |
| 633 | + * | |
| 634 | + * @param integer $rule_id | |
| 635 | + * @param string $redirect | |
| 636 | + * @return void | |
| 637 | + */ | |
| 638 | + private function redirect_user( $rule_id, $redirect ) { | |
| 639 | + $this->log_hacker( $rule_id, '', 'REDIRECT' ); | |
| 640 | + | |
| 641 | + // Don't redirect an invalid URL. | |
| 642 | + if ( ! $redirect || stripos( $redirect, 'http' ) === false ) { | |
| 643 | + return; | |
| 644 | + } | |
| 645 | + | |
| 646 | + ob_start(); | |
| 647 | + header( 'Location: ' . $redirect ); | |
| 648 | + ob_end_flush(); | |
| 649 | + exit; | |
| 650 | + } | |
| 651 | + | |
| 652 | + /** | |
| 653 | + * Determine if the user is authenticated and in the list of whitelisted roles. | |
| 654 | + * | |
| 655 | + * @param bool $bypass | |
| 656 | + * @return bool | |
| 657 | + */ | |
| 658 | + public function is_authenticated( $bypass = false ) { | |
| 659 | + if ( $bypass || ! is_user_logged_in() ) { | |
| 660 | + return false; | |
| 661 | + } | |
| 662 | + | |
| 663 | + // Get the whitelisted roles. | |
| 664 | + $roles = $this->get_option( 'patchstack_basic_firewall_roles', array( 'administrator', 'editor', 'author' ) ); | |
| 665 | + if ( ! is_array ( $roles ) ) { | |
| 666 | + return false; | |
| 667 | + } | |
| 668 | + | |
| 669 | + // Special scenario for super admins on a multisite environment. | |
| 670 | + if ( in_array( 'administrator', $roles ) && is_multisite() && is_super_admin() ) { | |
| 671 | + return true; | |
| 672 | + } | |
| 673 | + | |
| 674 | + // User is logged in, determine the role. | |
| 675 | + $user = wp_get_current_user(); | |
| 676 | + if ( ! isset( $user->roles ) || count( (array) $user->roles ) == 0 ) { | |
| 677 | + return false; | |
| 678 | + } | |
| 679 | + | |
| 680 | + // Is the user in the whitelist roles list? | |
| 681 | + $role_count = array_intersect( $user->roles, $roles ); | |
| 682 | + return count( $role_count ) != 0; | |
| 683 | + } | |
| 684 | + | |
| 685 | + /** | |
| 686 | + * Log the blocked request. | |
| 687 | + * | |
| 688 | + * @param integer $fid firewall | |
| 689 | + * @param array $query_vars | |
| 690 | + * @param string $block_type | |
| 691 | + * @param array $block_params | |
| 692 | + * @return void | |
| 693 | + */ | |
| 694 | + private function log_hacker( $fid = 1, $post_data = '', $block_type = 'BLOCK' ) { | |
| 695 | + global $wpdb; | |
| 696 | + if ( ! $wpdb || $fid == 22 ) { | |
| 697 | + return; | |
| 698 | + } | |
| 699 | + | |
| 700 | + // Insert into the logs. | |
| 701 | + $wpdb->insert( | |
| 702 | + $wpdb->prefix . 'patchstack_firewall_log', | |
| 703 | + array( | |
| 704 | + 'ip' => $this->get_ip(), | |
| 705 | + 'request_uri' => isset( $_SERVER['REQUEST_URI'] ) ? $_SERVER['REQUEST_URI'] : '', | |
| 706 | + 'user_agent' => isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT'] : '', | |
| 707 | + 'method' => isset( $_SERVER['REQUEST_METHOD'] ) ? $_SERVER['REQUEST_METHOD'] : '', | |
| 708 | + 'fid' => $fid, | |
| 709 | + 'flag' => '', | |
| 710 | + 'post_data' => $post_data != '' ? json_encode( $post_data ) : $this->get_post_data(), | |
| 711 | + 'block_type' => $block_type, | |
| 712 | + ) | |
| 713 | + ); | |
| 714 | + } | |
| 715 | + | |
| 716 | + /** | |
| 717 | + * Get POST data. | |
| 718 | + * | |
| 719 | + * @return string|NULL | |
| 720 | + */ | |
| 721 | + private function get_post_data() { | |
| 722 | + if ( ! isset( $_SERVER['REQUEST_METHOD'] ) || $_SERVER['REQUEST_METHOD'] != 'POST' ) { | |
| 723 | + return null; | |
| 724 | + } | |
| 725 | + | |
| 726 | + return json_encode( $_POST ); | |
| 727 | + } | |
| 728 | + | |
| 729 | + /** | |
| 730 | + * Display error page. | |
| 731 | + * | |
| 732 | + * @param integer $fid | |
| 733 | + * @return void | |
| 734 | + */ | |
| 735 | + public function display_error_page( $fid = 1 ) { | |
| 736 | + if ( $fid != 22 ) { | |
| 737 | + $this->log_hacker( $fid ); | |
| 738 | + } | |
| 739 | + | |
| 740 | + header( 'Cache-Control: no-store' ); | |
| 741 | + header( 'Pragma: no-cache' ); | |
| 742 | + http_response_code( 403 ); | |
| 743 | + require_once dirname( __FILE__ ) . '/views/access-denied.php'; | |
| 744 | + exit; | |
| 745 | + } | |
| 746 | +} | |
