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| 1 | <?php |
| 2 | /** |
| 3 | * Class to handle the Scan Status of Jetpack Protect |
| 4 | * |
| 5 | * @package automattic/jetpack-protect-plugin |
| 6 | */ |
| 7 | |
| 8 | namespace Automattic\Jetpack\Protect; |
| 9 | |
| 10 | use Automattic\Jetpack\Connection\Client; |
| 11 | use Automattic\Jetpack\Connection\Manager as Connection_Manager; |
| 12 | use Automattic\Jetpack\Protect_Models\Extension_Model; |
| 13 | use Automattic\Jetpack\Protect_Models\History_Model; |
| 14 | use Automattic\Jetpack\Protect_Models\Threat_Model; |
| 15 | use Automattic\Jetpack\Protect_Status\Plan; |
| 16 | use Jetpack_Options; |
| 17 | use WP_Error; |
| 18 | |
| 19 | /** |
| 20 | * Class that handles fetching of threats from the Scan API |
| 21 | */ |
| 22 | class Scan_History { |
| 23 | /** |
| 24 | * Scan endpoint |
| 25 | * |
| 26 | * @var string |
| 27 | */ |
| 28 | const SCAN_HISTORY_API_BASE = '/sites/%d/scan/history'; |
| 29 | |
| 30 | /** |
| 31 | * Name of the option where history is stored |
| 32 | * |
| 33 | * @var string |
| 34 | */ |
| 35 | const OPTION_NAME = 'jetpack_scan_history'; |
| 36 | |
| 37 | /** |
| 38 | * Name of the option where the timestamp of the history is stored |
| 39 | * |
| 40 | * @var string |
| 41 | */ |
| 42 | const OPTION_TIMESTAMP_NAME = 'jetpack_scan_history_timestamp'; |
| 43 | |
| 44 | /** |
| 45 | * Time in seconds that the cache should last |
| 46 | * |
| 47 | * @var int |
| 48 | */ |
| 49 | const OPTION_EXPIRES_AFTER = 300; // 5 minutes. |
| 50 | |
| 51 | /** |
| 52 | * Memoization for the current history |
| 53 | * |
| 54 | * @var null|History_Model |
| 55 | */ |
| 56 | public static $history = null; |
| 57 | |
| 58 | /** |
| 59 | * Checks if the current cached history is expired and should be renewed |
| 60 | * |
| 61 | * @return boolean |
| 62 | */ |
| 63 | public static function is_cache_expired() { |
| 64 | $option_timestamp = get_option( static::OPTION_TIMESTAMP_NAME ); |
| 65 | |
| 66 | if ( ! $option_timestamp ) { |
| 67 | return true; |
| 68 | } |
| 69 | |
| 70 | return time() > (int) $option_timestamp; |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * Checks if we should consider the stored cache or bypass it |
| 75 | * |
| 76 | * @return boolean |
| 77 | */ |
| 78 | public static function should_use_cache() { |
| 79 | return ! ( ( defined( 'JETPACK_PROTECT_DEV__BYPASS_CACHE' ) && JETPACK_PROTECT_DEV__BYPASS_CACHE ) ); |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Gets the current cached history |
| 84 | * |
| 85 | * @return bool|array False if value is not found. Array with values if cache is found. |
| 86 | */ |
| 87 | public static function get_from_options() { |
| 88 | return maybe_unserialize( get_option( static::OPTION_NAME ) ); |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * Updated the cached history and its timestamp |
| 93 | * |
| 94 | * @param array $history The new history to be cached. |
| 95 | * @return void |
| 96 | */ |
| 97 | public static function update_history_option( $history ) { |
| 98 | // TODO: Sanitize $history. |
| 99 | update_option( static::OPTION_NAME, maybe_serialize( $history ) ); |
| 100 | update_option( static::OPTION_TIMESTAMP_NAME, time() + static::OPTION_EXPIRES_AFTER ); |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Delete the cached history and its timestamp |
| 105 | * |
| 106 | * @return bool Whether all related history options were successfully deleted. |
| 107 | */ |
| 108 | public static function delete_option() { |
| 109 | $option_deleted = delete_option( static::OPTION_NAME ); |
| 110 | $option_timestamp_deleted = delete_option( static::OPTION_TIMESTAMP_NAME ); |
| 111 | |
| 112 | return $option_deleted && $option_timestamp_deleted; |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Gets the current history of the Jetpack Protect checks |
| 117 | * |
| 118 | * @param bool $refresh_from_wpcom Refresh the local plan and history cache from wpcom. |
| 119 | * @return History_Model|bool |
| 120 | */ |
| 121 | public static function get_scan_history( $refresh_from_wpcom = false ) { |
| 122 | $has_required_plan = Plan::has_required_plan(); |
| 123 | if ( ! $has_required_plan ) { |
| 124 | return false; |
| 125 | } |
| 126 | |
| 127 | if ( self::$history !== null ) { |
| 128 | return self::$history; |
| 129 | } |
| 130 | |
| 131 | if ( $refresh_from_wpcom || ! self::should_use_cache() || self::is_cache_expired() ) { |
| 132 | $history = self::fetch_from_api(); |
| 133 | } else { |
| 134 | $history = self::get_from_options(); |
| 135 | } |
| 136 | |
| 137 | if ( is_wp_error( $history ) ) { |
| 138 | $history = new History_Model( |
| 139 | array( |
| 140 | 'error' => true, |
| 141 | 'error_code' => $history->get_error_code(), |
| 142 | 'error_message' => $history->get_error_message(), |
| 143 | ) |
| 144 | ); |
| 145 | } else { |
| 146 | $history = self::normalize_api_data( $history ); |
| 147 | } |
| 148 | |
| 149 | self::$history = $history; |
| 150 | return $history; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * Gets the Scan API endpoint |
| 155 | * |
| 156 | * @return WP_Error|string |
| 157 | */ |
| 158 | public static function get_api_url() { |
| 159 | $blog_id = Jetpack_Options::get_option( 'id' ); |
| 160 | $is_connected = ( new Connection_Manager() )->is_connected(); |
| 161 | |
| 162 | if ( ! $blog_id || ! $is_connected ) { |
| 163 | return new WP_Error( 'site_not_connected' ); |
| 164 | } |
| 165 | |
| 166 | $api_url = sprintf( self::SCAN_HISTORY_API_BASE, $blog_id ); |
| 167 | |
| 168 | return $api_url; |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * Fetches the history data from the Scan API |
| 173 | * |
| 174 | * @return WP_Error|array |
| 175 | */ |
| 176 | public static function fetch_from_api() { |
| 177 | $api_url = self::get_api_url(); |
| 178 | if ( is_wp_error( $api_url ) ) { |
| 179 | return $api_url; |
| 180 | } |
| 181 | |
| 182 | $response = Client::wpcom_json_api_request_as_blog( |
| 183 | $api_url, |
| 184 | '2', |
| 185 | array( |
| 186 | 'method' => 'GET', |
| 187 | 'timeout' => 30, |
| 188 | ), |
| 189 | null, |
| 190 | 'wpcom' |
| 191 | ); |
| 192 | |
| 193 | $response_code = wp_remote_retrieve_response_code( $response ); |
| 194 | |
| 195 | if ( is_wp_error( $response ) || 200 !== $response_code || empty( $response['body'] ) ) { |
| 196 | return new WP_Error( 'failed_fetching_status', 'Failed to fetch Scan history from the server', array( 'status' => $response_code ) ); |
| 197 | } |
| 198 | |
| 199 | $body = json_decode( wp_remote_retrieve_body( $response ) ); |
| 200 | $body->last_checked = ( new \DateTime() )->format( 'Y-m-d H:i:s' ); |
| 201 | self::update_history_option( $body ); |
| 202 | |
| 203 | return $body; |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Normalize API Data |
| 208 | * Formats the payload from the Scan API into an instance of History_Model. |
| 209 | * |
| 210 | * @phan-suppress PhanDeprecatedProperty -- Maintaining backwards compatibility. |
| 211 | * |
| 212 | * @param object $scan_data The data returned by the scan API. |
| 213 | * @return History_Model |
| 214 | */ |
| 215 | private static function normalize_api_data( $scan_data ) { |
| 216 | $history = new History_Model(); |
| 217 | $history->num_threats = 0; |
| 218 | $history->num_core_threats = 0; |
| 219 | $history->num_plugins_threats = 0; |
| 220 | $history->num_themes_threats = 0; |
| 221 | |
| 222 | $history->last_checked = $scan_data->last_checked; |
| 223 | |
| 224 | if ( empty( $scan_data->threats ) || ! is_array( $scan_data->threats ) ) { |
| 225 | return $history; |
| 226 | } |
| 227 | |
| 228 | foreach ( $scan_data->threats as $threat ) { |
| 229 | if ( isset( $threat->extension->type ) ) { |
| 230 | if ( 'plugin' === $threat->extension->type ) { |
| 231 | self::handle_extension_threats( $threat, $history, 'plugin' ); |
| 232 | continue; |
| 233 | } |
| 234 | |
| 235 | if ( 'theme' === $threat->extension->type ) { |
| 236 | self::handle_extension_threats( $threat, $history, 'theme' ); |
| 237 | continue; |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | if ( 'Vulnerable.WP.Core' === $threat->signature ) { |
| 242 | self::handle_core_threats( $threat, $history ); |
| 243 | continue; |
| 244 | } |
| 245 | |
| 246 | self::handle_additional_threats( $threat, $history ); |
| 247 | } |
| 248 | |
| 249 | return $history; |
| 250 | } |
| 251 | |
| 252 | /** |
| 253 | * Handles threats for extensions such as plugins or themes. |
| 254 | * |
| 255 | * @phan-suppress PhanDeprecatedProperty -- Maintaining backwards compatibility. |
| 256 | * |
| 257 | * @param object $threat The threat object. |
| 258 | * @param object $history The history object. |
| 259 | * @param string $type The type of extension ('plugin' or 'theme'). |
| 260 | * @return void |
| 261 | */ |
| 262 | private static function handle_extension_threats( $threat, $history, $type ) { |
| 263 | $extension_list = $type === 'plugin' ? 'plugins' : 'themes'; |
| 264 | $extensions = &$history->{ $extension_list}; |
| 265 | $found_index = null; |
| 266 | |
| 267 | // Check if the extension does not exist in the array |
| 268 | foreach ( $extensions as $index => $extension ) { |
| 269 | if ( $extension->slug === $threat->extension->slug ) { |
| 270 | $found_index = $index; |
| 271 | break; |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | // Add the extension if it does not yet exist in the history |
| 276 | if ( $found_index === null ) { |
| 277 | $new_extension = new Extension_Model( |
| 278 | array( |
| 279 | 'name' => $threat->extension->name ?? null, |
| 280 | 'slug' => $threat->extension->slug ?? null, |
| 281 | 'version' => $threat->extension->version ?? null, |
| 282 | 'type' => $type, |
| 283 | 'checked' => true, |
| 284 | 'threats' => array(), |
| 285 | ) |
| 286 | ); |
| 287 | $extensions[] = $new_extension; |
| 288 | $found_index = array_key_last( $extensions ); |
| 289 | } |
| 290 | |
| 291 | // Add the threat to the found extension |
| 292 | $extensions[ $found_index ]->threats[] = new Threat_Model( $threat ); |
| 293 | |
| 294 | // Increment the threat counts |
| 295 | ++$history->num_threats; |
| 296 | if ( $type === 'plugin' ) { |
| 297 | ++$history->num_plugins_threats; |
| 298 | } elseif ( $type === 'theme' ) { |
| 299 | ++$history->num_themes_threats; |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | /** |
| 304 | * Handles core threats |
| 305 | * |
| 306 | * @param object $threat The threat object. |
| 307 | * @param object $history The history object. |
| 308 | * @return void |
| 309 | */ |
| 310 | private static function handle_core_threats( $threat, $history ) { |
| 311 | // Check if the core version does not exist in the array |
| 312 | $found_index = null; |
| 313 | foreach ( $history->core as $index => $core ) { |
| 314 | if ( $core->version === $threat->version ) { |
| 315 | $found_index = $index; |
| 316 | break; |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | // Add the extension if it does not yet exist in the history |
| 321 | if ( null === $found_index ) { |
| 322 | $new_core = new Extension_Model( |
| 323 | array( |
| 324 | 'name' => 'WordPress', |
| 325 | 'version' => $threat->version, |
| 326 | 'type' => 'core', |
| 327 | 'checked' => true, |
| 328 | 'threats' => array(), |
| 329 | ) |
| 330 | ); |
| 331 | $history->core[] = $new_core; |
| 332 | $found_index = array_key_last( $history->core ); |
| 333 | } |
| 334 | |
| 335 | // Add the threat to the found core |
| 336 | $history->core[ $found_index ]->threats[] = new Threat_Model( $threat ); |
| 337 | |
| 338 | ++$history->num_threats; |
| 339 | ++$history->num_core_threats; |
| 340 | } |
| 341 | |
| 342 | /** |
| 343 | * Handles additional threats that are not core, plugin or theme |
| 344 | * |
| 345 | * @param object $threat The threat object. |
| 346 | * @param object $history The history object. |
| 347 | * @return void |
| 348 | */ |
| 349 | private static function handle_additional_threats( $threat, $history ) { |
| 350 | if ( ! empty( $threat->filename ) ) { |
| 351 | $history->files[] = new Threat_Model( $threat ); |
| 352 | ++$history->num_threats; |
| 353 | } elseif ( ! empty( $threat->table ) ) { |
| 354 | $history->database[] = new Threat_Model( $threat ); |
| 355 | ++$history->num_threats; |
| 356 | } |
| 357 | } |
| 358 | } |