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| 1 | <?php |
| 2 | /** |
| 3 | * Safeguard utilities file. |
| 4 | * |
| 5 | * @package safeguard |
| 6 | */ |
| 7 | |
| 8 | namespace Safeguard; |
| 9 | |
| 10 | use Automattic\Jetpack\Connection\Client as Jetpack_Client; |
| 11 | use Jetpack_Options; |
| 12 | use RecursiveDirectoryIterator; |
| 13 | use RecursiveIteratorIterator; |
| 14 | use WP_Error; |
| 15 | use WPCOMSH_Log; |
| 16 | use ZipArchive; |
| 17 | |
| 18 | const DOTORG_API_HOST = 'https://api.wordpress.org'; |
| 19 | const DOTORG_PLUGINS_HOST = DOTORG_API_HOST . '/plugins'; |
| 20 | const DOTORG_PLUGIN_INFO_ENDPOINT = DOTORG_PLUGINS_HOST . '/info/1.0/'; |
| 21 | |
| 22 | /** |
| 23 | * Perform a request to the .org API to get information about the given plugin. |
| 24 | * |
| 25 | * @param string $slug Plugin slug. |
| 26 | * @return array|WP_Error |
| 27 | */ |
| 28 | function search_plugin_info( $slug ) { |
| 29 | $request = array( |
| 30 | 'action' => 'plugin_information', |
| 31 | 'timeout' => 15, |
| 32 | ); |
| 33 | $response = wp_remote_post( DOTORG_PLUGIN_INFO_ENDPOINT . $slug, array( 'body' => $request ) ); |
| 34 | $plugin_info = maybe_unserialize( $response['body'] ); |
| 35 | |
| 36 | if ( $plugin_info && property_exists( $plugin_info, 'error' ) ) { |
| 37 | return new WP_Error( 'search_plugin_error', $plugin_info->error ); |
| 38 | } |
| 39 | |
| 40 | return $plugin_info; |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * Perform a request to WP COM API endpoint to check the plugin. |
| 45 | * |
| 46 | * @param string $slug Plugin slug. |
| 47 | * @param array $body Array data with needed information to check the plugin. |
| 48 | * @return WP_Error|array Error instance if something fails, the response if plugin is accepted. |
| 49 | */ |
| 50 | function request_check_plugin( $slug, $body ) { |
| 51 | $wpcom_blog_id = Jetpack_Options::get_option( 'id' ); |
| 52 | $endpoint = "/sites/{$wpcom_blog_id}/plugins/{$slug}/check"; |
| 53 | |
| 54 | $request = Jetpack_Client::wpcom_json_api_request_as_blog( |
| 55 | $endpoint, |
| 56 | Jetpack_Client::WPCOM_JSON_API_VERSION, |
| 57 | array( 'method' => 'POST' ), |
| 58 | $body |
| 59 | ); |
| 60 | |
| 61 | if ( is_wp_error( $request ) ) { |
| 62 | return $request; |
| 63 | } |
| 64 | |
| 65 | if ( ! is_array( $request ) || ! isset( $request['body'] ) ) { |
| 66 | return new WP_Error( |
| 67 | 'failed_to_fetch_data', |
| 68 | esc_html__( 'Unable to fetch the requested data.', 'wpcomsh' ), |
| 69 | array( 'status' => 500 ) |
| 70 | ); |
| 71 | } |
| 72 | |
| 73 | $response_code = wp_remote_retrieve_response_code( $request ); |
| 74 | $response = json_decode( wp_remote_retrieve_body( $request ), true ) ?? array(); |
| 75 | |
| 76 | $error_data = array( |
| 77 | 'wpcom_blog_id' => $wpcom_blog_id, |
| 78 | 'endpoint' => $endpoint, |
| 79 | 'response' => $response, |
| 80 | ); |
| 81 | |
| 82 | if ( $response_code === 404 ) { |
| 83 | $error_data['response-code'] = 404; |
| 84 | return new WP_Error( 'checking_plugin_failed', 'Request route not found.', $error_data ); |
| 85 | } |
| 86 | |
| 87 | // It should be changed passing the `reject` action. |
| 88 | if ( $response_code === 400 ) { |
| 89 | $error_data['response-code'] = 400; |
| 90 | return new WP_Error( 'unaccepted_plugin', $response['message'] ?? '', $error_data ); |
| 91 | } |
| 92 | |
| 93 | if ( empty( $response ) || ! $response_code || $response_code < 200 || $response_code >= 300 ) { |
| 94 | return new WP_Error( |
| 95 | 'checking_plugin_failed', |
| 96 | "Invalid response from API - {$response_code}", |
| 97 | $error_data |
| 98 | ); |
| 99 | } |
| 100 | |
| 101 | if ( isset( $response['action'] ) && $response['action'] === 'reject' ) { |
| 102 | return new WP_Error( 'unaccepted_plugin', $response['message'] ?? '', $response['threats'] ?? '' ); |
| 103 | } |
| 104 | |
| 105 | $result = array( |
| 106 | 'action' => (string) ( $response['action'] ?? '' ), |
| 107 | 'message' => (string) ( $response['message'] ?? '' ), |
| 108 | 'registered' => (string) ( $response['registered'] ?? '' ), |
| 109 | ); |
| 110 | |
| 111 | if ( array_key_exists( 'threats', $response ) ) { |
| 112 | $result['threats'] = $response['threats']; |
| 113 | } |
| 114 | |
| 115 | return $result; |
| 116 | } |
| 117 | |
| 118 | /** |
| 119 | * Tries to decompress the package into a temporary folder. |
| 120 | * |
| 121 | * @param string $package Plugin package. |
| 122 | * @return string|WP_Error |
| 123 | */ |
| 124 | function uncompress_package( $package ) { |
| 125 | $package_info = pathinfo( $package ); |
| 126 | $package_filename = $package_info['filename']; |
| 127 | |
| 128 | $current_upload_folder = wp_upload_dir(); |
| 129 | $path = $current_upload_folder['path']; |
| 130 | |
| 131 | $tmp_package_folder = "{$path}/{$package_filename}"; |
| 132 | |
| 133 | // Try to unzip the file. |
| 134 | $zip_handler = new ZipArchive(); |
| 135 | $was_opened = $zip_handler->open( $package ); |
| 136 | if ( $was_opened !== true ) { |
| 137 | return new WP_Error( 'process_failed', 'The zip file could not be opened.' ); |
| 138 | } |
| 139 | |
| 140 | $was_uncompressed = $zip_handler->extractTo( $tmp_package_folder ); |
| 141 | if ( ! $was_uncompressed ) { |
| 142 | return new WP_Error( 'process_failed', 'The zip file could not be decompressed.' ); |
| 143 | } |
| 144 | |
| 145 | $zip_handler->close(); |
| 146 | |
| 147 | return $tmp_package_folder; |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Clean folder structure. |
| 152 | * |
| 153 | * @param string $dir Directory path. |
| 154 | * |
| 155 | * @return bool |
| 156 | */ |
| 157 | function clean_folder( $dir ) { |
| 158 | if ( ! is_dir( $dir ) ) { |
| 159 | return false; |
| 160 | } |
| 161 | |
| 162 | $it = new RecursiveDirectoryIterator( $dir, RecursiveDirectoryIterator::SKIP_DOTS ); |
| 163 | $old_files = new RecursiveIteratorIterator( $it, RecursiveIteratorIterator::CHILD_FIRST ); |
| 164 | |
| 165 | foreach ( $old_files as $old_file ) { |
| 166 | if ( $old_file->isDir() ) { |
| 167 | // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_rmdir |
| 168 | rmdir( $old_file->getRealPath() ); |
| 169 | } else { |
| 170 | // phpcs:ignore WordPress.WP.AlternativeFunctions.unlink_unlink |
| 171 | unlink( $old_file->getRealPath() ); |
| 172 | } |
| 173 | } |
| 174 | // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_rmdir |
| 175 | rmdir( $dir ); |
| 176 | |
| 177 | return true; |
| 178 | } |
| 179 | |
| 180 | /** |
| 181 | * It tries to get the plugin-slug and plugin-version from the file package. |
| 182 | * |
| 183 | * Some information: |
| 184 | * |
| 185 | * > If you use a directory to contain your Plugin files, then the directory name will be used by WordPress |
| 186 | * > when checking the WordPress Plugin Repository for updates. If your plugin only consists of a single PHP |
| 187 | * > file, then the file name will be used. If WordPress tells you that a newer version of your Plugin is |
| 188 | * > available, but you know nothing about a newer version, beware. It's possible that another Plugin with the |
| 189 | * > same directory name or file name is in the Plugin Repository, and it's this one which WordPress is seeing. |
| 190 | * |
| 191 | * - https://codex.wordpress.org/Writing_a_Plugin#Names.2C_Files.2C_and_Locations |
| 192 | * |
| 193 | * @param string $package Path of the package. Generally it's a .zip file. |
| 194 | * @return array|WP_Error Slug and version Array, or a WP_Error instance if something fails. |
| 195 | */ |
| 196 | function get_plugin_data_from_package( $package ) { |
| 197 | if ( ! is_file( $package ) ) { |
| 198 | return new WP_Error( 'process_package_fails', 'Invalid plugin file.' ); |
| 199 | } |
| 200 | |
| 201 | $plugin_folder = false; |
| 202 | $tmp_plugin_folder = uncompress_package( $package ); |
| 203 | if ( is_wp_error( $tmp_plugin_folder ) ) { |
| 204 | return $tmp_plugin_folder; |
| 205 | } |
| 206 | |
| 207 | $tmp_plugin_dir = @ opendir( $tmp_plugin_folder ); // phpcs:ignore WordPress.PHP.NoSilencedErrors |
| 208 | $plugin_files = array(); |
| 209 | if ( $tmp_plugin_dir ) { |
| 210 | while ( ( $file = readdir( $tmp_plugin_dir ) ) !== false ) { // phpcs:ignore Generic.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition |
| 211 | if ( substr( $file, 0, 1 ) === '.' ) { |
| 212 | continue; |
| 213 | } |
| 214 | if ( is_dir( $tmp_plugin_folder . '/' . $file ) ) { |
| 215 | // Get plugin slug from the folder. |
| 216 | $plugin_folder = $tmp_plugin_folder . '/' . $file; |
| 217 | |
| 218 | $plugins_subdir = @ opendir( $tmp_plugin_folder . '/' . $file ); // phpcs:ignore WordPress.PHP.NoSilencedErrors |
| 219 | if ( $plugins_subdir ) { |
| 220 | while ( ( $subfile = readdir( $plugins_subdir ) ) !== false ) { // phpcs:ignore Generic.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition |
| 221 | if ( substr( $subfile, 0, 1 ) === '.' ) { |
| 222 | continue; |
| 223 | } |
| 224 | if ( substr( $subfile, -4 ) === '.php' ) { |
| 225 | $plugin_files[] = "$file/$subfile"; |
| 226 | } |
| 227 | } |
| 228 | closedir( $plugins_subdir ); |
| 229 | } |
| 230 | } elseif ( substr( $file, -4 ) === '.php' ) { |
| 231 | $plugin_files[] = $file; |
| 232 | |
| 233 | // Get plugin slug from the file. |
| 234 | $plugin_folder = $tmp_plugin_folder . '/' . $file; |
| 235 | } |
| 236 | } |
| 237 | closedir( $tmp_plugin_dir ); |
| 238 | } |
| 239 | |
| 240 | if ( ! $plugin_folder ) { |
| 241 | return new WP_Error( 'process_package_fails', 'Getting plugin slug from package failed.' ); |
| 242 | } |
| 243 | |
| 244 | if ( empty( $plugin_files ) ) { |
| 245 | return new WP_Error( 'process_package_fails', 'Package does not have valid files.' ); |
| 246 | } |
| 247 | |
| 248 | // Finish getting plugin slug. |
| 249 | $plugin_pathinfo = pathinfo( $plugin_folder ); |
| 250 | $plugin_slug = $plugin_pathinfo['filename']; |
| 251 | |
| 252 | if ( ! $plugin_slug ) { |
| 253 | return new WP_Error( 'process_package_fails', 'Plugin slug not found.' ); |
| 254 | } |
| 255 | |
| 256 | $result = array( |
| 257 | 'slug' => $plugin_slug, |
| 258 | 'hash' => hash_file( 'sha256', $package ), |
| 259 | ); |
| 260 | |
| 261 | /* |
| 262 | * Populate result array with plugin data, check if the plugin name is defined, |
| 263 | * and get the plugin version if it exists. |
| 264 | */ |
| 265 | foreach ( $plugin_files as $plugin_file ) { |
| 266 | $plugin_filename = "{$tmp_plugin_folder}/{$plugin_file}"; |
| 267 | if ( ! is_readable( $plugin_folder ) ) { |
| 268 | continue; |
| 269 | } |
| 270 | |
| 271 | $plugin_data = get_plugin_data( $plugin_filename, false, false ); |
| 272 | if ( empty( $plugin_data['Name'] ) ) { |
| 273 | continue; |
| 274 | } |
| 275 | |
| 276 | $result['header'] = $plugin_data; |
| 277 | } |
| 278 | |
| 279 | if ( ! array_key_exists( 'header', $result ) ) { |
| 280 | return new WP_Error( 'process_package_fails', 'Package does not have valid header.' ); |
| 281 | } |
| 282 | |
| 283 | // Copy version from header. |
| 284 | if ( array_key_exists( 'Version', $result['header'] ) ) { |
| 285 | $result['version'] = $result['header']['Version']; |
| 286 | } |
| 287 | if ( array_key_exists( 'version', $result['header'] ) ) { |
| 288 | $result['version'] = $result['header']['version']; |
| 289 | } |
| 290 | |
| 291 | // Clean temporary folder. |
| 292 | clean_folder( $tmp_plugin_folder ); |
| 293 | |
| 294 | return $result; |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * Logs safeguard errors. |
| 299 | * |
| 300 | * @param WP_Error|string $error WP_Error object or error message. |
| 301 | * @param array $extra Optional. Additional information about the error. Defaults to empty array. |
| 302 | * |
| 303 | * @return WP_Error|string |
| 304 | */ |
| 305 | function log_safeguard_error( $error, $extra = array() ) { |
| 306 | $message = 'Safeguard: '; |
| 307 | |
| 308 | if ( is_wp_error( $error ) ) { |
| 309 | $message .= $error->get_error_message(); |
| 310 | } else { |
| 311 | $message .= $error; |
| 312 | } |
| 313 | |
| 314 | WPCOMSH_Log::unsafe_direct_log( |
| 315 | $message, |
| 316 | wp_json_encode( $extra, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES ) |
| 317 | ); |
| 318 | |
| 319 | return $error; |
| 320 | } |