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| 1 | <?php |
| 2 | /** |
| 3 | * The Server_Sandbox class. |
| 4 | * |
| 5 | * This feature is only useful for Automattic developers. |
| 6 | * It configures Jetpack to talk to staging/sandbox servers |
| 7 | * on WordPress.com instead of production servers. |
| 8 | * |
| 9 | * @package automattic/jetpack-sandbox |
| 10 | */ |
| 11 | |
| 12 | namespace Automattic\Jetpack\Connection; |
| 13 | |
| 14 | use Automattic\Jetpack\Constants; |
| 15 | |
| 16 | /** |
| 17 | * The Server_Sandbox class. |
| 18 | */ |
| 19 | class Server_Sandbox { |
| 20 | |
| 21 | /** |
| 22 | * Sets up the action hooks for the server sandbox. |
| 23 | */ |
| 24 | public function init() { |
| 25 | if ( did_action( 'jetpack_server_sandbox_init' ) ) { |
| 26 | return; |
| 27 | } |
| 28 | |
| 29 | add_action( 'requests-requests.before_request', array( $this, 'server_sandbox' ), 10, 4 ); |
| 30 | add_action( 'admin_bar_menu', array( $this, 'admin_bar_add_sandbox_item' ), 999 ); |
| 31 | |
| 32 | /** |
| 33 | * Fires when the server sandbox is initialized. This action is used to ensure that |
| 34 | * the server sandbox action hooks are set up only once. |
| 35 | * |
| 36 | * @since 1.30.7 |
| 37 | */ |
| 38 | do_action( 'jetpack_server_sandbox_init' ); |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * Returns the new url and host values. |
| 43 | * |
| 44 | * @param string $sandbox Sandbox domain. |
| 45 | * @param string $url URL of request about to be made. |
| 46 | * @param array $headers Headers of request about to be made. |
| 47 | * @param string $data The body of request about to be made. |
| 48 | * @param string $method The method of request about to be made. |
| 49 | * |
| 50 | * @return array [ 'url' => new URL, 'host' => new Host, 'new_signature => New signature if url was changed ] |
| 51 | */ |
| 52 | public function server_sandbox_request_parameters( $sandbox, $url, $headers, $data = null, $method = 'GET' ) { |
| 53 | $host = ''; |
| 54 | $new_signature = ''; |
| 55 | |
| 56 | if ( ! is_string( $sandbox ) || ! is_string( $url ) ) { |
| 57 | return array( |
| 58 | 'url' => $url, |
| 59 | 'host' => $host, |
| 60 | 'new_signature' => $new_signature, |
| 61 | ); |
| 62 | } |
| 63 | |
| 64 | $url_host = wp_parse_url( $url, PHP_URL_HOST ); |
| 65 | |
| 66 | switch ( $url_host ) { |
| 67 | case 'public-api.wordpress.com': |
| 68 | case 'jetpack.wordpress.com': |
| 69 | case 'jetpack.com': |
| 70 | case 'dashboard.wordpress.com': |
| 71 | $host = $headers['Host'] ?? $url_host; |
| 72 | $original_url = $url; |
| 73 | $url = preg_replace( |
| 74 | '@^(https?://)' . preg_quote( $url_host, '@' ) . '(?=[/?#].*|$)@', |
| 75 | '${1}' . $sandbox, |
| 76 | $url, |
| 77 | 1 |
| 78 | ); |
| 79 | |
| 80 | /** |
| 81 | * Whether to add the X Debug query parameter to the request made to the Sandbox |
| 82 | * |
| 83 | * @since 1.36.0 |
| 84 | * |
| 85 | * @param bool $add_parameter Whether to add the parameter to the request or not. Default is to false. |
| 86 | * @param string $url The URL of the request being made. |
| 87 | * @param string $host The host of the request being made. |
| 88 | */ |
| 89 | if ( apply_filters( 'jetpack_sandbox_add_profile_parameter', false, $url, $host ) ) { |
| 90 | $url = add_query_arg( 'XDEBUG_PROFILE', 1, $url ); |
| 91 | |
| 92 | // URL has been modified since the signature was created. We'll need a new one. |
| 93 | $original_url = add_query_arg( 'XDEBUG_PROFILE', 1, $original_url ); |
| 94 | $new_signature = $this->get_new_signature( $original_url, $headers, $data, $method ); |
| 95 | |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | return compact( 'url', 'host', 'new_signature' ); |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Gets a new signature for the request |
| 104 | * |
| 105 | * @param string $url The new URL to be signed. |
| 106 | * @param array $headers The headers of the request about to be made. |
| 107 | * @param string $data The body of request about to be made. |
| 108 | * @param string $method The method of the request about to be made. |
| 109 | * @return string|null |
| 110 | */ |
| 111 | private function get_new_signature( $url, $headers, $data, $method ) { |
| 112 | |
| 113 | if ( ! empty( $headers['Authorization'] ) ) { |
| 114 | $a_headers = $this->extract_authorization_headers( $headers ); |
| 115 | if ( ! empty( $a_headers ) ) { |
| 116 | $token_details = explode( ':', $a_headers['token'] ); |
| 117 | |
| 118 | if ( count( $token_details ) === 3 ) { |
| 119 | $user_id = $token_details[2]; |
| 120 | $token = ( new Tokens() )->get_access_token( $user_id ); |
| 121 | $time_diff = (int) \Jetpack_Options::get_option( 'time_diff' ); |
| 122 | $jetpack_signature = new \Jetpack_Signature( $token->secret, $time_diff ); |
| 123 | |
| 124 | $signature = $jetpack_signature->sign_request( |
| 125 | $a_headers['token'], |
| 126 | $a_headers['timestamp'], |
| 127 | $a_headers['nonce'], |
| 128 | $a_headers['body-hash'], |
| 129 | $method, |
| 130 | $url, |
| 131 | $data, |
| 132 | false |
| 133 | ); |
| 134 | |
| 135 | if ( $signature && ! is_wp_error( $signature ) ) { |
| 136 | return $signature; |
| 137 | } elseif ( is_wp_error( $signature ) ) { |
| 138 | $this->log_new_signature_error( $signature->get_error_message() ); |
| 139 | } |
| 140 | } else { |
| 141 | $this->log_new_signature_error( 'Malformed token on Authorization Header' ); |
| 142 | } |
| 143 | } else { |
| 144 | $this->log_new_signature_error( 'Error extracting Authorization Header' ); |
| 145 | } |
| 146 | } else { |
| 147 | $this->log_new_signature_error( 'Empty Authorization Header' ); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * Logs error if the attempt to create a new signature fails |
| 153 | * |
| 154 | * @param string $message The error message. |
| 155 | * @return void |
| 156 | */ |
| 157 | private function log_new_signature_error( $message ) { |
| 158 | if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { |
| 159 | error_log( sprintf( "SANDBOXING: Error re-signing the request. '%s'", $message ) ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Extract the values in the Authorization header into an array |
| 165 | * |
| 166 | * @param array $headers The headers of the request about to be made. |
| 167 | * @return array|null |
| 168 | */ |
| 169 | public function extract_authorization_headers( $headers ) { |
| 170 | if ( ! empty( $headers['Authorization'] ) && is_string( $headers['Authorization'] ) ) { |
| 171 | $header = str_replace( 'X_JETPACK ', '', $headers['Authorization'] ); |
| 172 | $vars = explode( ' ', $header ); |
| 173 | $result = array(); |
| 174 | foreach ( $vars as $var ) { |
| 175 | $elements = explode( '"', $var ); |
| 176 | if ( count( $elements ) === 3 ) { |
| 177 | $result[ substr( $elements[0], 0, -1 ) ] = $elements[1]; |
| 178 | } |
| 179 | } |
| 180 | return $result; |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * Modifies parameters of request in order to send the request to the |
| 186 | * server specified by `JETPACK__SANDBOX_DOMAIN`. |
| 187 | * |
| 188 | * Attached to the `requests-requests.before_request` filter. |
| 189 | * |
| 190 | * @param string $url URL of request about to be made. |
| 191 | * @param array $headers Headers of request about to be made. |
| 192 | * @param array|string $data Data of request about to be made. |
| 193 | * @param string $type Type of request about to be made. |
| 194 | * @return void |
| 195 | */ |
| 196 | public function server_sandbox( &$url, &$headers, &$data = null, &$type = null ) { |
| 197 | if ( ! Constants::get_constant( 'JETPACK__SANDBOX_DOMAIN' ) ) { |
| 198 | return; |
| 199 | } |
| 200 | |
| 201 | $original_url = $url; |
| 202 | |
| 203 | $request_parameters = $this->server_sandbox_request_parameters( Constants::get_constant( 'JETPACK__SANDBOX_DOMAIN' ), $url, $headers, $data, $type ); |
| 204 | |
| 205 | $url = $request_parameters['url']; |
| 206 | |
| 207 | if ( $request_parameters['host'] ) { |
| 208 | $headers['Host'] = $request_parameters['host']; |
| 209 | |
| 210 | if ( $request_parameters['new_signature'] ) { |
| 211 | $headers['Authorization'] = preg_replace( '/signature=\"[^\"]+\"/', 'signature="' . $request_parameters['new_signature'] . '"', $headers['Authorization'] ); |
| 212 | } |
| 213 | |
| 214 | if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) { |
| 215 | error_log( sprintf( "SANDBOXING via '%s': '%s'", Constants::get_constant( 'JETPACK__SANDBOX_DOMAIN' ), $original_url ) ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log |
| 216 | } |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * Adds a "Jetpack API Sandboxed" item to the admin bar if the JETPACK__SANDBOX_DOMAIN |
| 222 | * constant is set. |
| 223 | * |
| 224 | * Attached to the `admin_bar_menu` action. |
| 225 | * |
| 226 | * @param \WP_Admin_Bar $wp_admin_bar The WP_Admin_Bar instance. |
| 227 | */ |
| 228 | public function admin_bar_add_sandbox_item( $wp_admin_bar ) { |
| 229 | if ( ! Constants::get_constant( 'JETPACK__SANDBOX_DOMAIN' ) ) { |
| 230 | return; |
| 231 | } |
| 232 | |
| 233 | $node = array( |
| 234 | 'id' => 'jetpack-connection-api-sandbox', |
| 235 | 'title' => 'Jetpack API Sandboxed', |
| 236 | 'meta' => array( |
| 237 | 'title' => 'Sandboxing via ' . Constants::get_constant( 'JETPACK__SANDBOX_DOMAIN' ), |
| 238 | ), |
| 239 | ); |
| 240 | |
| 241 | $wp_admin_bar->add_menu( $node ); |
| 242 | } |
| 243 | } |