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| generate | |
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| 1 | <?php |
| 2 | /** |
| 3 | * Handles generation and deletion of the bootstrap for the standalone WAF mode. |
| 4 | * |
| 5 | * @package automattic/jetpack-waf |
| 6 | */ |
| 7 | |
| 8 | namespace Automattic\Jetpack\Waf; |
| 9 | |
| 10 | use Composer\InstalledVersions; |
| 11 | |
| 12 | /** |
| 13 | * Handles the bootstrap. |
| 14 | * |
| 15 | * @phan-constructor-used-for-side-effects |
| 16 | */ |
| 17 | class Waf_Standalone_Bootstrap { |
| 18 | |
| 19 | /** |
| 20 | * Ensures that constants are initialized if this class is used. |
| 21 | * |
| 22 | * @return void |
| 23 | */ |
| 24 | public function __construct() { |
| 25 | $this->guard_against_missing_abspath(); |
| 26 | $this->initialize_constants(); |
| 27 | } |
| 28 | |
| 29 | /** |
| 30 | * Ensures that this class is not used unless we are in the right context. |
| 31 | * |
| 32 | * @throws Waf_Exception If we are outside of WordPress. |
| 33 | * |
| 34 | * @return void |
| 35 | */ |
| 36 | private function guard_against_missing_abspath() { |
| 37 | |
| 38 | if ( ! defined( 'ABSPATH' ) ) { |
| 39 | throw new Waf_Exception( 'Cannot generate the WAF bootstrap if we are not running in WordPress context.' ); |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * Initializes the constants required for generating the bootstrap, if they have not been initialized yet. |
| 45 | * |
| 46 | * @return void |
| 47 | */ |
| 48 | private function initialize_constants() { |
| 49 | Waf_Constants::initialize_constants(); |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Initialized the WP filesystem and serves as a mocking hook for tests. |
| 54 | * |
| 55 | * Should only be implemented after the wp_loaded action hook: |
| 56 | * |
| 57 | * @link https://developer.wordpress.org/reference/functions/wp_filesystem/#more-information |
| 58 | * |
| 59 | * @return void |
| 60 | */ |
| 61 | protected function initialize_filesystem() { |
| 62 | if ( ! function_exists( '\\WP_Filesystem' ) ) { |
| 63 | require_once ABSPATH . 'wp-admin/includes/file.php'; |
| 64 | } |
| 65 | |
| 66 | WP_Filesystem(); |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Finds the path to the autoloader, which can then be used to require the autoloader in the generated boostrap file. |
| 71 | * |
| 72 | * @throws Waf_Exception In case the autoloader file cannot be found. |
| 73 | * |
| 74 | * @return string|null |
| 75 | */ |
| 76 | private function locate_autoloader_file() { |
| 77 | global $jetpack_autoloader_loader; |
| 78 | |
| 79 | $autoload_file = null; |
| 80 | |
| 81 | // Try the Jetpack autoloader. |
| 82 | if ( isset( $jetpack_autoloader_loader ) ) { |
| 83 | $class_file = $jetpack_autoloader_loader->find_class_file( Waf_Runner::class ); |
| 84 | if ( $class_file ) { |
| 85 | $autoload_file = dirname( $class_file, 5 ) . '/vendor/autoload.php'; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | // Try Composer's autoloader. |
| 90 | if ( null === $autoload_file |
| 91 | && is_callable( array( InstalledVersions::class, 'getInstallPath' ) ) |
| 92 | && InstalledVersions::isInstalled( 'automattic/jetpack-waf' ) |
| 93 | ) { |
| 94 | $package_file = InstalledVersions::getInstallPath( 'automattic/jetpack-waf' ); |
| 95 | if ( substr( $package_file, -23 ) === '/automattic/jetpack-waf' ) { |
| 96 | $autoload_file = dirname( $package_file, 3 ) . '/vendor/autoload.php'; |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | // Guess. First look for being in a `vendor/automattic/jetpack-waf/src/', then see if we're standalone with our own vendor dir. |
| 101 | if ( null === $autoload_file ) { |
| 102 | $autoload_file = dirname( __DIR__, 4 ) . '/vendor/autoload.php'; |
| 103 | if ( ! file_exists( $autoload_file ) ) { |
| 104 | $autoload_file = dirname( __DIR__ ) . '/vendor/autoload.php'; |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | // Check that the determined file actually exists. |
| 109 | if ( ! file_exists( $autoload_file ) ) { |
| 110 | throw new Waf_Exception( 'Cannot find autoloader, and the WAF standalone boostrap will not work without it.' ); |
| 111 | } |
| 112 | |
| 113 | return $autoload_file; |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Gets the path to the bootstrap.php file. |
| 118 | * |
| 119 | * @return string The bootstrap.php file path. |
| 120 | */ |
| 121 | public function get_bootstrap_file_path() { |
| 122 | return trailingslashit( JETPACK_WAF_DIR ) . 'bootstrap.php'; |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * Gets the entrypoint file. |
| 127 | * |
| 128 | * @return string The entrypoint file. |
| 129 | */ |
| 130 | private function get_entrypoint() { |
| 131 | return defined( 'JETPACK_WAF_ENTRYPOINT' ) ? JETPACK_WAF_ENTRYPOINT : 'rules/rules.php'; |
| 132 | } |
| 133 | |
| 134 | /** |
| 135 | * Generates the bootstrap file. |
| 136 | * |
| 137 | * @throws File_System_Exception If the filesystem is not available. |
| 138 | * @throws File_System_Exception If the WAF directory cannot be created. |
| 139 | * @throws File_System_Exception If the bootstrap file cannot be created. |
| 140 | * |
| 141 | * @return string Absolute path to the bootstrap file. |
| 142 | */ |
| 143 | public function generate() { |
| 144 | |
| 145 | $this->initialize_filesystem(); |
| 146 | |
| 147 | global $wp_filesystem; |
| 148 | if ( ! $wp_filesystem ) { |
| 149 | throw new File_System_Exception( 'Cannot work without the file system being initialized.' ); |
| 150 | } |
| 151 | |
| 152 | $autoloader_file = $this->locate_autoloader_file(); |
| 153 | |
| 154 | $bootstrap_file = $this->get_bootstrap_file_path(); |
| 155 | $entrypoint = $this->get_entrypoint(); |
| 156 | $mode_option = get_option( Waf_Runner::MODE_OPTION_NAME, false ); |
| 157 | $share_data_option = get_option( Waf_Runner::SHARE_DATA_OPTION_NAME, false ); |
| 158 | $share_debug_data_option = get_option( Waf_Runner::SHARE_DEBUG_DATA_OPTION_NAME, false ); |
| 159 | |
| 160 | // phpcs:disable WordPress.PHP.DevelopmentFunctions |
| 161 | $code = "<?php\n" |
| 162 | . sprintf( "define( 'DISABLE_JETPACK_WAF', %s );\n", var_export( defined( 'DISABLE_JETPACK_WAF' ) && DISABLE_JETPACK_WAF, true ) ) |
| 163 | . "if ( defined( 'DISABLE_JETPACK_WAF' ) && DISABLE_JETPACK_WAF ) return;\n" |
| 164 | . sprintf( "define( 'JETPACK_WAF_MODE', %s );\n", var_export( $mode_option ? $mode_option : 'silent', true ) ) |
| 165 | . sprintf( "define( 'JETPACK_WAF_SHARE_DATA', %s );\n", var_export( $share_data_option, true ) ) |
| 166 | . sprintf( "define( 'JETPACK_WAF_SHARE_DEBUG_DATA', %s );\n", var_export( $share_debug_data_option, true ) ) |
| 167 | . sprintf( "define( 'JETPACK_WAF_DIR', %s );\n", var_export( JETPACK_WAF_DIR, true ) ) |
| 168 | . sprintf( "define( 'JETPACK_WAF_WPCONFIG', %s );\n", var_export( JETPACK_WAF_WPCONFIG, true ) ) |
| 169 | . sprintf( "define( 'JETPACK_WAF_ENTRYPOINT', %s );\n", var_export( $entrypoint, true ) ) |
| 170 | . 'require_once ' . var_export( $autoloader_file, true ) . ";\n" |
| 171 | . "Automattic\Jetpack\Waf\Waf_Runner::initialize();\n"; |
| 172 | // phpcs:enable |
| 173 | |
| 174 | if ( ! $wp_filesystem->is_dir( JETPACK_WAF_DIR ) ) { |
| 175 | if ( ! $wp_filesystem->mkdir( JETPACK_WAF_DIR ) ) { |
| 176 | throw new File_System_Exception( 'Failed creating WAF standalone bootstrap file directory: ' . JETPACK_WAF_DIR ); |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | if ( ! $wp_filesystem->put_contents( $bootstrap_file, $code ) ) { |
| 181 | throw new File_System_Exception( 'Failed writing WAF standalone bootstrap file to: ' . $bootstrap_file ); |
| 182 | } |
| 183 | |
| 184 | return $bootstrap_file; |
| 185 | } |
| 186 | } |