class.jetpack-client.php
| 1 | <?php |
| 2 | |
| 3 | class Jetpack_Client { |
| 4 | const WPCOM_JSON_API_VERSION = '1.1'; |
| 5 | |
| 6 | /** |
| 7 | * Makes an authorized remote request using Jetpack_Signature |
| 8 | * |
| 9 | * @return array|WP_Error WP HTTP response on success |
| 10 | */ |
| 11 | public static function remote_request( $args, $body = null ) { |
| 12 | $defaults = array( |
| 13 | 'url' => '', |
| 14 | 'user_id' => 0, |
| 15 | 'blog_id' => 0, |
| 16 | 'auth_location' => JETPACK_CLIENT__AUTH_LOCATION, |
| 17 | 'method' => 'POST', |
| 18 | 'timeout' => 10, |
| 19 | 'redirection' => 0, |
| 20 | 'headers' => array(), |
| 21 | ); |
| 22 | |
| 23 | $args = wp_parse_args( $args, $defaults ); |
| 24 | |
| 25 | $args['blog_id'] = (int) $args['blog_id']; |
| 26 | |
| 27 | if ( 'header' != $args['auth_location'] ) { |
| 28 | $args['auth_location'] = 'query_string'; |
| 29 | } |
| 30 | |
| 31 | $token = Jetpack_Data::get_access_token( $args['user_id'] ); |
| 32 | if ( !$token ) { |
| 33 | return new Jetpack_Error( 'missing_token' ); |
| 34 | } |
| 35 | |
| 36 | $method = strtoupper( $args['method'] ); |
| 37 | |
| 38 | $timeout = intval( $args['timeout'] ); |
| 39 | |
| 40 | $redirection = $args['redirection']; |
| 41 | |
| 42 | $request = compact( 'method', 'body', 'timeout', 'redirection' ); |
| 43 | |
| 44 | @list( $token_key, $secret ) = explode( '.', $token->secret ); |
| 45 | if ( empty( $token ) || empty( $secret ) ) { |
| 46 | return new Jetpack_Error( 'malformed_token' ); |
| 47 | } |
| 48 | |
| 49 | $token_key = sprintf( '%s:%d:%d', $token_key, JETPACK__API_VERSION, $token->external_user_id ); |
| 50 | |
| 51 | require_once JETPACK__PLUGIN_DIR . 'class.jetpack-signature.php'; |
| 52 | |
| 53 | $time_diff = (int) Jetpack_Options::get_option( 'time_diff' ); |
| 54 | $jetpack_signature = new Jetpack_Signature( $token->secret, $time_diff ); |
| 55 | |
| 56 | $timestamp = time() + $time_diff; |
| 57 | |
| 58 | if( function_exists( 'wp_generate_password' ) ) { |
| 59 | $nonce = wp_generate_password( 10, false ); |
| 60 | } else { |
| 61 | $nonce = substr( sha1( rand( 0, 1000000 ) ), 0, 10); |
| 62 | } |
| 63 | |
| 64 | // Kind of annoying. Maybe refactor Jetpack_Signature to handle body-hashing |
| 65 | if ( is_null( $body ) ) { |
| 66 | $body_hash = ''; |
| 67 | } else { |
| 68 | if ( !is_string( $body ) ) { |
| 69 | return new Jetpack_Error( 'invalid_body', 'Body is malformed.' ); |
| 70 | } |
| 71 | $body_hash = jetpack_sha1_base64( $body ); |
| 72 | } |
| 73 | |
| 74 | $auth = array( |
| 75 | 'token' => $token_key, |
| 76 | 'timestamp' => $timestamp, |
| 77 | 'nonce' => $nonce, |
| 78 | 'body-hash' => $body_hash, |
| 79 | ); |
| 80 | |
| 81 | if ( false !== strpos( $args['url'], 'xmlrpc.php' ) ) { |
| 82 | $url_args = array( |
| 83 | 'for' => 'jetpack', |
| 84 | 'wpcom_blog_id' => Jetpack_Options::get_option( 'id' ), |
| 85 | ); |
| 86 | } else { |
| 87 | $url_args = array(); |
| 88 | } |
| 89 | |
| 90 | if ( 'header' != $args['auth_location'] ) { |
| 91 | $url_args += $auth; |
| 92 | } |
| 93 | |
| 94 | $url = add_query_arg( urlencode_deep( $url_args ), $args['url'] ); |
| 95 | $url = Jetpack::fix_url_for_bad_hosts( $url ); |
| 96 | |
| 97 | $signature = $jetpack_signature->sign_request( $token_key, $timestamp, $nonce, $body_hash, $method, $url, $body, false ); |
| 98 | |
| 99 | if ( !$signature || is_wp_error( $signature ) ) { |
| 100 | return $signature; |
| 101 | } |
| 102 | |
| 103 | // Send an Authorization header so various caches/proxies do the right thing |
| 104 | $auth['signature'] = $signature; |
| 105 | $auth['version'] = JETPACK__VERSION; |
| 106 | $header_pieces = array(); |
| 107 | foreach ( $auth as $key => $value ) { |
| 108 | $header_pieces[] = sprintf( '%s="%s"', $key, $value ); |
| 109 | } |
| 110 | $request['headers'] = array_merge( $args['headers'], array( |
| 111 | 'Authorization' => "X_JETPACK " . join( ' ', $header_pieces ), |
| 112 | ) ); |
| 113 | |
| 114 | // Make sure we keep the host when we do JETPACK__WPCOM_JSON_API_HOST requests. |
| 115 | $host = parse_url( $url, PHP_URL_HOST ); |
| 116 | if ( $host === JETPACK__WPCOM_JSON_API_HOST ) { |
| 117 | $request['headers']['Host'] = 'public-api.wordpress.com'; |
| 118 | } |
| 119 | |
| 120 | if ( 'header' != $args['auth_location'] ) { |
| 121 | $url = add_query_arg( 'signature', urlencode( $signature ), $url ); |
| 122 | } |
| 123 | |
| 124 | return Jetpack_Client::_wp_remote_request( $url, $request ); |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * Wrapper for wp_remote_request(). Turns off SSL verification for certain SSL errors. |
| 129 | * This is lame, but many, many, many hosts have misconfigured SSL. |
| 130 | * |
| 131 | * When Jetpack is registered, the jetpack_fallback_no_verify_ssl_certs option is set to the current time if: |
| 132 | * 1. a certificate error is found AND |
| 133 | * 2. not verifying the certificate works around the problem. |
| 134 | * |
| 135 | * The option is checked on each request. |
| 136 | * |
| 137 | * @internal |
| 138 | * @see Jetpack::fix_url_for_bad_hosts() |
| 139 | * |
| 140 | * @return array|WP_Error WP HTTP response on success |
| 141 | */ |
| 142 | public static function _wp_remote_request( $url, $args, $set_fallback = false ) { |
| 143 | /** |
| 144 | * SSL verification (`sslverify`) for the JetpackClient remote request |
| 145 | * defaults to off, use this filter to force it on. |
| 146 | * |
| 147 | * Return `true` to ENABLE SSL verification, return `false` |
| 148 | * to DISABLE SSL verification. |
| 149 | * |
| 150 | * @since 3.6.0 |
| 151 | * |
| 152 | * @param bool Whether to force `sslverify` or not. |
| 153 | */ |
| 154 | if ( apply_filters( 'jetpack_client_verify_ssl_certs', false ) ) { |
| 155 | return wp_remote_request( $url, $args ); |
| 156 | } |
| 157 | |
| 158 | $fallback = Jetpack_Options::get_option( 'fallback_no_verify_ssl_certs' ); |
| 159 | if ( false === $fallback ) { |
| 160 | Jetpack_Options::update_option( 'fallback_no_verify_ssl_certs', 0 ); |
| 161 | } |
| 162 | |
| 163 | if ( (int) $fallback ) { |
| 164 | // We're flagged to fallback |
| 165 | $args['sslverify'] = false; |
| 166 | } |
| 167 | |
| 168 | $response = wp_remote_request( $url, $args ); |
| 169 | |
| 170 | if ( |
| 171 | !$set_fallback // We're not allowed to set the flag on this request, so whatever happens happens |
| 172 | || |
| 173 | isset( $args['sslverify'] ) && !$args['sslverify'] // No verification - no point in doing it again |
| 174 | || |
| 175 | !is_wp_error( $response ) // Let it ride |
| 176 | ) { |
| 177 | Jetpack_Client::set_time_diff( $response, $set_fallback ); |
| 178 | return $response; |
| 179 | } |
| 180 | |
| 181 | // At this point, we're not flagged to fallback and we are allowed to set the flag on this request. |
| 182 | |
| 183 | $message = $response->get_error_message(); |
| 184 | |
| 185 | // Is it an SSL Certificate verification error? |
| 186 | if ( |
| 187 | false === strpos( $message, '14090086' ) // OpenSSL SSL3 certificate error |
| 188 | && |
| 189 | false === strpos( $message, '1407E086' ) // OpenSSL SSL2 certificate error |
| 190 | && |
| 191 | false === strpos( $message, 'error setting certificate verify locations' ) // cURL CA bundle not found |
| 192 | && |
| 193 | false === strpos( $message, 'Peer certificate cannot be authenticated with' ) // cURL CURLE_SSL_CACERT: CA bundle found, but not helpful |
| 194 | // different versions of curl have different error messages |
| 195 | // this string should catch them all |
| 196 | && |
| 197 | false === strpos( $message, 'Problem with the SSL CA cert' ) // cURL CURLE_SSL_CACERT_BADFILE: probably access rights |
| 198 | ) { |
| 199 | // No, it is not. |
| 200 | return $response; |
| 201 | } |
| 202 | |
| 203 | // Redo the request without SSL certificate verification. |
| 204 | $args['sslverify'] = false; |
| 205 | $response = wp_remote_request( $url, $args ); |
| 206 | |
| 207 | if ( !is_wp_error( $response ) ) { |
| 208 | // The request went through this time, flag for future fallbacks |
| 209 | Jetpack_Options::update_option( 'fallback_no_verify_ssl_certs', time() ); |
| 210 | Jetpack_Client::set_time_diff( $response, $set_fallback ); |
| 211 | } |
| 212 | |
| 213 | return $response; |
| 214 | } |
| 215 | |
| 216 | public static function set_time_diff( &$response, $force_set = false ) { |
| 217 | $code = wp_remote_retrieve_response_code( $response ); |
| 218 | |
| 219 | // Only trust the Date header on some responses |
| 220 | if ( 200 != $code && 304 != $code && 400 != $code && 401 != $code ) { |
| 221 | return; |
| 222 | } |
| 223 | |
| 224 | if ( !$date = wp_remote_retrieve_header( $response, 'date' ) ) { |
| 225 | return; |
| 226 | } |
| 227 | |
| 228 | if ( 0 >= $time = (int) strtotime( $date ) ) { |
| 229 | return; |
| 230 | } |
| 231 | |
| 232 | $time_diff = $time - time(); |
| 233 | |
| 234 | if ( $force_set ) { // during register |
| 235 | Jetpack_Options::update_option( 'time_diff', $time_diff ); |
| 236 | } else { // otherwise |
| 237 | $old_diff = Jetpack_Options::get_option( 'time_diff' ); |
| 238 | if ( false === $old_diff || abs( $time_diff - (int) $old_diff ) > 10 ) { |
| 239 | Jetpack_Options::update_option( 'time_diff', $time_diff ); |
| 240 | } |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * Query the WordPress.com REST API using the blog token |
| 246 | * |
| 247 | * @param string $path |
| 248 | * @param string $version |
| 249 | * @param array $args |
| 250 | * @param string $body |
| 251 | * @return array|WP_Error $response Data. |
| 252 | */ |
| 253 | static function wpcom_json_api_request_as_blog( $path, $version = self::WPCOM_JSON_API_VERSION, $args = array(), $body = null ) { |
| 254 | $filtered_args = array_intersect_key( $args, array( |
| 255 | 'method' => 'string', |
| 256 | 'timeout' => 'int', |
| 257 | 'redirection' => 'int', |
| 258 | ) ); |
| 259 | |
| 260 | /** |
| 261 | * Determines whether Jetpack can send outbound https requests to the WPCOM api. |
| 262 | * |
| 263 | * @since 3.6.0 |
| 264 | * |
| 265 | * @param bool $proto Defaults to true. |
| 266 | */ |
| 267 | $proto = apply_filters( 'jetpack_can_make_outbound_https', true ) ? 'https' : 'http'; |
| 268 | |
| 269 | // unprecedingslashit |
| 270 | $_path = preg_replace( '/^\//', '', $path ); |
| 271 | |
| 272 | // Use GET by default whereas `remote_request` uses POST |
| 273 | if ( isset( $filtered_args['method'] ) && strtoupper( $filtered_args['method'] === 'POST' ) ) { |
| 274 | $request_method = 'POST'; |
| 275 | } else { |
| 276 | $request_method = 'GET'; |
| 277 | } |
| 278 | |
| 279 | $validated_args = array_merge( $filtered_args, array( |
| 280 | 'url' => sprintf( '%s://%s/rest/v%s/%s', $proto, JETPACK__WPCOM_JSON_API_HOST, $version, $_path ), |
| 281 | 'blog_id' => (int) Jetpack_Options::get_option( 'id' ), |
| 282 | 'method' => $request_method, |
| 283 | ) ); |
| 284 | |
| 285 | return Jetpack_Client::remote_request( $validated_args, $body ); |
| 286 | } |
| 287 | |
| 288 | } |
| 289 |