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<?php /** * File: class-crypt.php * * @link https://www.boldgrid.com * @since 1.3.0 * * @package Boldgrid * @subpackage Boldgrid\Backup\Premium\Admin * @copyright BoldGrid * @author BoldGrid <support@boldgrid.com> / namespace Boldgrid\Backup\Premium\Admin; /* * Class: Crypt * * @since 1.3.0 / class Crypt { /* * The BoldGrid Backup core class object. * * @since 1.3.0 * @access private * @var \Boldgrid_Backup_Admin_Core / private $core; /* * The Boldgrid Backup Premium core object. * * @since 1.3.0 * @access private * @var \Boldgrid_Backup_Premium_Admin_Core / private $premium_core; /* * Allowed modes for encryption operations. * * Crypt mode: "e" (encrypt) or "d" (decrypt). * * @since 1.3.0 * @access private * @var array / private $allowed_modes = array( 'e', // Encrypt. 'd', // Decrypt. ); /* * Constructor. * * @since 1.3.0 * * @param \Boldgrid_Backup_Admin_Core $core \Boldgrid_Backup_Admin_Core object. * @param \Boldgrid_Backup_Premium_Admin_Core $premium_core \Boldgrid_Backup_Premium_Admin_Core object. / public function __construct( \Boldgrid_Backup_Admin_Core $core, \Boldgrid_Backup_Premium_Admin_Core $premium_core ) { $this->core = $core; $this->premium_core = $premium_core; } /* * Post database dump action hook. * * Encrypt file contents, if configured in the settings. * * @since 1.3.0 * * @see \Boldgrid_Backup_Admin_Settings::get_settings() * @see \Boldgrid_Backup_Admin_Config::get_is_premium() * @see self::crypt_file() * * @param string $filepath Filepath. * @return bool / public function post_dump( $filepath ) { $success = false; $settings = $this->core->settings->get_settings(); if ( ! empty( $settings['encrypt_db'] ) ) { $success = $this->crypt_file( $filepath, 'e' ); } if ( $success ) { /* * Allow the filtering of our $info before generating a backup. * * @since 1.5.1 * * @param array $info Archive information. / add_filter( 'boldgrid_backup_pre_archive_info', function( $info ) { $info['encrypt_db'] = true; $info['encrypt_sig'] = $this->get_token_hash(); return $info; } ); } return $success; } /* * Filter hook for "boldgrid_backup_post_get_dump_file". * * Decrypts file contents/data, if encrypted. * * @since 1.3.0 * * @see self::crypt_data() * * @param string $file_contents Possibly encrypted MySQL dump file contents. * @return string Unencrypted MySQL dump file contents. / public function post_get_dump_file( $file_contents ) { if ( ! empty( $file_contents[0]['content'] ) ) { $data = $this->crypt_data( $file_contents[0]['content'], 'd' ); } if ( ! empty( $data ) ) { $file_contents[0]['content'] = $data; } return $file_contents; } /* * Filter archive attribute value. * * Allows operations to be performed on attribute changes and alter the value depending on results. * * @since 1.3.1 * * @see \Boldgrid_Backup_Admin_Core::get_dump_file() * @see self::archive_crypt_file() * * @param mixed $value New value. * @param mixed $old_value Old value. * @param mixed $key Key name. * @param string $filepath Archive filepath. * @return string Filtered new value. / public function filter_update_attribute( $value, $old_value, $key, $filepath ) { // Handle changing of "encrypt_db". if ( 'encrypt_db' === $key && $value != $old_value ) { // phpcs:ignore $dump_file = basename( $this->core->get_dump_file( $filepath ) ); $mode = empty( $value ) ? 'd' : 'e'; $success = $this->archive_crypt_file( $filepath, $dump_file, $mode ); $value = (bool) ( $success ? $value : $old_value ); } return $value; } /* * Get the BoldGrid Backup Settings. * * Checks the openssl settings and save defaults if not present. * * @since 1.3.0 * * @see \Boldgrid_Backup_Admin_Settings::get_settings() * * @return array / public function get_settings() { $settings = $this->core->settings->get_settings(); $settings['updated'] = time(); $settings['openssl']['cipher'] = ! empty( $settings['openssl']['cipher'] ) && openssl_cipher_iv_length( $settings['openssl']['cipher'] ) ? $settings['openssl']['cipher'] : 'AES-256-CBC'; $settings['openssl']['iv'] = ! empty( $settings['openssl']['iv'] ) ? $settings['openssl']['iv'] : bin2hex( openssl_random_pseudo_bytes( openssl_cipher_iv_length( $settings['openssl']['cipher'] ) ) ); $settings['openssl']['key'] = ! empty( $settings['openssl']['key'] ) ? $settings['openssl']['key'] : hash( 'sha256', openssl_random_pseudo_bytes( 16 ) ); update_site_option( 'boldgrid_backup_settings', $settings ); return $settings; } /* * Get the crypt token hash. * * A crypt token hash is used to compare the encryption settings signature. * * @since 1.3.0 * * @return string / public function get_token_hash() { return md5( $this->get_crypt_token() ); } /* * Get the crypt token. * * A crypt token is a represeantation of the encryption settings for a user to copy and paste. * * @since 1.3.0 * * @return string / public function get_crypt_token() { return bin2hex( gzcompress( wp_json_encode( $this->get_settings()['openssl'] ), 9 ) ); } /* * Decode the encryption settings using a crypt token. * * A crypt token is a represeantation of the encryption settings for a user to copy and paste. * * @since 1.3.0 * * @param string $crypt_token A crypt token string. * @return array Decoded encryption settings. / public function decode_crypt_token( $crypt_token ) { $settings = array(); if ( ! empty( $crypt_token ) && 0 === strlen( $crypt_token ) % 2 ) { $setting = json_decode( @gzuncompress( hex2bin( $crypt_token ) ), true ); // phpcs:ignore } if ( ! empty( $setting['cipher'] ) && ! empty( $setting['iv'] ) && ! empty( $setting['key'] ) ) { $settings['openssl'] = $setting; } return $settings; } /* * Is the specified file encrypted with our settings. * * @since 1.3.0 * * @param string $filepath Filepath. * @return bool / public function is_file_encrypted( $filepath ) { $data = $this->core->wp_filesystem->get_contents( $filepath ); if ( empty( $data ) ) { return false; } return false !== $this->crypt_data( $data, 'd' ); } /* * Encrypt or decrypt file contents. * * @since 1.3.0 * * @see \WP_Filesystem::get_contents() * @see self::crypt_data() * @see \WP_Filesystem::put_contents() * * @param string $filepath Filepath. * @param string $mode Crypt mode: "e" (encrypt) or "d" (decrypt). * @return bool / public function crypt_file( $filepath, $mode ) { $success = false; if ( ! in_array( $mode, $this->allowed_modes, true ) ) { return false; } $data = $this->core->wp_filesystem->get_contents( $filepath ); if ( ! empty( $data ) ) { $data = $this->crypt_data( $data, $mode ); } if ( false !== $data ) { $success = (bool) $this->core->wp_filesystem->put_contents( $filepath, $data ); } return $success; } /* * Encrypt or decrypt data, depending on mode argument. * * @since 1.3.0 * * @param string $data Data. * @param string $mode Crypt mode: "e" (encrypt) or "d" (decrypt). * @return string\|false / public function crypt_data( $data, $mode ) { if ( ! in_array( $mode, $this->allowed_modes, true ) \|\| empty( $data ) ) { return false; } $function = 'e' === $mode ? 'openssl_encrypt' : 'openssl_decrypt'; $settings = $this->get_settings(); $data = $function( $data, $settings['openssl']['cipher'], $settings['openssl']['key'], 0, hex2bin( $settings['openssl']['iv'] ) ); return $data; } /* * Encrypt or decrypt a file in a backup archive. * * @since 1.3.0 * * @see \Boldgrid_Backup_Admin_Archive::init() * @see self::crypt_data() * @see \Boldgrid_Backup_Admin_Backup_Dir::get() * * @uses \Boldgrid_Backup_Admin_Archive::log * * @param string $filepath Archive filepath. * @param string $filename Filename. * @param string $mode Crypt mode: "e" (encrypt) or "d" (decrypt). * @return bool */ public function archive_crypt_file( $filepath, $filename, $mode ) { if ( empty( $filepath ) \|\| empty( $filename ) \|\| ! in_array( $mode, $this->allowed_modes, true ) \|\| ! $this->core->wp_filesystem->is_writable( $filepath ) ) { return false; } if ( ! class_exists( '\PclZip' ) ) { require_once ABSPATH . 'wp-admin/includes/class-pclzip.php'; } $this->core->archive->init( $filepath ); $archive = new \PclZip( $filepath ); if ( 0 === $archive ) { return false; } $list = $archive->listContent(); if ( empty( $list ) ) { return false; } $file_index = false; foreach ( $list as $index => $filedata ) { if ( $filename === $filedata['filename'] ) { $file_index = $index; break; } } if ( false === $file_index ) { return false; } $file_contents = $archive->extractByIndex( $file_index, PCLZIP_OPT_EXTRACT_AS_STRING ); if ( empty( $file_contents[0]['content'] ) ) { return false; } $data = $this->crypt_data( $file_contents[0]['content'], $mode ); if ( empty( $data ) ) { return false; } $crypt_file_path = $this->core->backup_dir->get() . '/' . $filename; $written = $this->core->wp_filesystem->put_contents( $crypt_file_path, $data ); if ( ! $written ) { return false; } $log = $this->core->archive->log; // Ensure the act updating a file does not change the backup file's timestamp. if ( ! empty( $log['lastmodunix'] ) ) { $this->core->wp_filesystem->touch( $crypt_file_path, $log['lastmodunix'] ); } $status = $archive->deleteByIndex( $file_index ); if ( 0 === $status ) { return false; } $status = $archive->add( $crypt_file_path, PCLZIP_OPT_REMOVE_ALL_PATH ); if ( 0 === $status ) { return false; } return true; } }

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