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<?php |
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|
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// Do not allow the file to be called directly. |
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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/** |
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* This class provides the firewall functionality. |
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*/ |
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class P_Firewall extends P_Core { |
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|
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/** |
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* Launch the firewall rule processor. |
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* |
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* @param bool $from_main Whether or not the firewall is loaded from the main script or not. |
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* @param Patchstack $core |
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* @param bool $skip Whether or not to process and execute the rules. |
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* @param bool $muCall Whether or not this was called from mu-plugin. |
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* @return void |
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*/ |
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public function __construct( $from_main = false, $core = null, $skip = false, $muCall = false ) { |
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if ( ! $from_main || ! $core ) { |
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if ( $core ) { |
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parent::__construct( $core ); |
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} |
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return; |
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} |
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|
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parent::__construct( $core ); |
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|
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// If we only want to initialize the firewall but not execute the rules. |
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if ( $skip || defined( 'DOING_CRON' ) ) { |
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return; |
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} |
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|
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// Load the extension. |
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require_once __DIR__ . '/../lib/patchstack/vendor/autoload.php'; |
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$extension = new Patchstack\Extensions\WordPress\Extension( |
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[ |
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'patchstack_basic_firewall_roles' => $this->get_option( 'patchstack_basic_firewall_roles', [ 'administrator', 'editor', 'author' ] ), |
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'patchstack_whitelist' => get_option( 'patchstack_whitelist', '' ) |
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], |
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$this |
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); |
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|
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// Initiate the firewall processor with our settings. |
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$firewall = new Patchstack\Processor( |
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$extension, |
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$this->decode_rule_option('patchstack_firewall_rules_v3'), |
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$this->decode_rule_option('patchstack_whitelist_rules_v3'), |
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[ |
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'autoblockAttempts' => $this->get_option( 'patchstack_autoblock_attempts', 10 ), |
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'autoblockMinutes' => $this->get_option( 'patchstack_autoblock_minutes', 30 ), |
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'autoblockTime' => $this->get_option( 'patchstack_autoblock_blocktime', 60 ), |
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'whitelistKeysRules' => $this->decode_rule_option( 'patchstack_whitelist_keys_rules' ), |
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'mustUsePluginCall' => $muCall |
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], |
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$this->decode_rule_option('patchstack_firewall_rules'), |
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$this->decode_rule_option('patchstack_whitelist_rules') |
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); |
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|
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// Launch the firewall. |
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$firewall->launch(); |
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} |
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|
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/** |
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* Safely decode a stored rule option into an array. The option is expected to be |
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* a JSON string, but may already be an array (or a malformed value); passing a |
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* non-string to json_decode() is a fatal TypeError on PHP 8. |
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* |
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* @param string $name |
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* @return array |
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*/ |
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private function decode_rule_option( $name ) { |
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$value = get_option( $name, '[]' ); |
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|
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if ( is_array( $value ) ) { |
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return $value; |
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} |
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|
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if ( ! is_string( $value ) ) { |
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return []; |
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} |
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|
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$decoded = json_decode( $value, true ); |
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return is_array( $decoded ) ? $decoded : []; |
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} |
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|
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/** |
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* Determine if the user is authenticated and in the list of whitelisted roles. |
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* |
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* @return bool |
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*/ |
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public function is_authenticated() { |
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if ( ! is_user_logged_in() ) { |
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return false; |
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} |
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|
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// Get the whitelisted roles. |
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$roles = $this->get_option( 'patchstack_basic_firewall_roles', [ 'administrator', 'editor', 'author' ] ); |
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if ( ! is_array( $roles ) ) { |
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return false; |
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} |
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|
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// Special scenario for super admins on a multisite environment. |
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if ( in_array( 'administrator', $roles ) && is_multisite() && is_super_admin() ) { |
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return true; |
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} |
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|
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// Get the roles of the user. |
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$user = wp_get_current_user(); |
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if ( ! isset( $user->roles ) || count( (array) $user->roles ) == 0 ) { |
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return false; |
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} |
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|
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// Is the user in the whitelist roles list? |
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$role_count = array_intersect( $user->roles, $roles ); |
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return count( $role_count ) != 0; |
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} |
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|
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/** |
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* Display error page. |
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* |
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* @param integer $fid |
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* @return void |
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*/ |
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public function display_error_page( $fid = 1 ) { |
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if ( $fid != 22 && $fid != 23 && $fid != 24 && $fid != 'login' ) { |
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$this->log_request( $fid ); |
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} |
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|
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// Supported by a number of popular caching plugins. |
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if ( ! defined( 'DONOTCACHEPAGE' ) ) { |
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define( 'DONOTCACHEPAGE', true ); |
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} |
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|
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// Because WP Fastest Cache just has to be special... |
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if (function_exists('wpfc_exclude_current_page')) { |
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@wpfc_exclude_current_page(); |
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} |
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|
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// Send forbidden headers and no-caching headers as well. |
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status_header(403); |
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send_nosniff_header(); |
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nocache_headers(); |
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|
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if ( $fid == 'login' ) { |
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require_once dirname( __FILE__ ) . '/views/access-denied-login.php'; |
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} else { |
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require_once dirname( __FILE__ ) . '/views/access-denied.php'; |
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} |
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|
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exit; |
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} |
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|
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/** |
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* Log the blocked request. |
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* |
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* @param int $fid |
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* @return void |
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*/ |
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private function log_request( $fid = 1 ) { |
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global $wpdb; |
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if ( ! $wpdb || $fid == 22 || $fid == 23 || $fid == 24 || $fid == 'login' ) { |
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return; |
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} |
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|
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// Insert into the logs. |
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$wpdb->insert( |
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$wpdb->prefix . 'patchstack_firewall_log', |
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array( |
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'ip' => $this->get_ip(), |
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'request_uri' => isset( $_SERVER['REQUEST_URI'] ) ? $_SERVER['REQUEST_URI'] : '', |
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'user_agent' => isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT'] : '', |
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'method' => isset( $_SERVER['REQUEST_METHOD'] ) ? $_SERVER['REQUEST_METHOD'] : '', |
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'fid' => $fid, |
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'flag' => '', |
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'post_data' => '', |
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'block_type' => 'BLOCK', |
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) |
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); |
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} |
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|
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/** |
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* Extract the number of blocked hits the past 30 days based on the current counters. |
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* |
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* @return int |
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*/ |
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public function get_hits_counter() { |
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$counters = get_option( 'patchstack_hits_last_30', [] ); |
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if (!is_array($counters) || count($counters) === 0) { |
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return 0; |
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} |
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|
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// Set the range of dates we need. |
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$hits = 0; |
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$start = new \DateTime(); |
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$start->modify('-30 days'); |
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|
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$end = new \DateTime(); |
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$end->modify('+1 day'); |
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|
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$interval = new \DateInterval('P1D'); |
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$range = new \DatePeriod($start, $interval, $end); |
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|
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// Set the range from -6 days to +1 day from now. |
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foreach ($range as $date) { |
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$formattedDate = $date->format('Y-m-d'); |
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if (isset($counters[$formattedDate])) { |
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$hits += $counters[$formattedDate]; |
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} |
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} |
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|
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return $hits; |
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} |
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} |
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|
