''}} }} // eefw-security-400-start if (!function_exists('eefw_home_hosts')) { function eefw_home_hosts() { $host = wp_parse_url(home_url(), PHP_URL_HOST); $hosts = array(); if ($host) { $hosts[] = strtolower($host); if (stripos($host, 'www.') === 0) { $hosts[] = strtolower(substr($host, 4)); } else { $hosts[] = 'www.' . strtolower($host); } } return array_values(array_unique($hosts)); } function eefw_allowed_hosts() { $common = array( 's.w.org','stats.wp.com','www.googletagmanager.com','tagmanager.google.com', 'www.google-analytics.com','ssl.google-analytics.com','region1.google-analytics.com', 'analytics.google.com','www.google.com','www.gstatic.com','ssl.gstatic.com', 'www.recaptcha.net','recaptcha.net','challenges.cloudflare.com','js.stripe.com', 'www.paypal.com','sandbox.paypal.com','www.sandbox.paypal.com', 'maps.googleapis.com','maps.gstatic.com','www.youtube.com','youtube.com', 'www.youtube-nocookie.com','youtube-nocookie.com','s.ytimg.com','i.ytimg.com', 'player.vimeo.com','f.vimeocdn.com','i.vimeocdn.com', 'fonts.googleapis.com','fonts.gstatic.com','cdn.jsdelivr.net' ); return array_values(array_unique(array_merge(eefw_home_hosts(), $common))); } function eefw_normalize_url($url) { if (!is_string($url) || $url === '') return $url; if (strpos($url, '//') === 0) return (is_ssl() ? 'https:' : 'http:') . $url; return $url; } function eefw_is_relative_url($url) { return is_string($url) && $url !== '' && strpos($url, '/') === 0 && strpos($url, '//') !== 0; } function eefw_host_allowed($host) { if (!$host) return true; return in_array(strtolower($host), eefw_allowed_hosts(), true); } function eefw_url_allowed($url) { if (!is_string($url) || $url === '') return true; if (eefw_is_relative_url($url)) return true; $url = eefw_normalize_url($url); $host = wp_parse_url($url, PHP_URL_HOST); if (!$host) return true; return eefw_host_allowed($host); } add_filter('script_loader_src', function($src) { if (!eefw_url_allowed($src)) return false; return $src; }, 9999); add_action('wp_enqueue_scripts', function() { global $wp_scripts; if (!isset($wp_scripts->registered) || !is_array($wp_scripts->registered)) return; foreach ($wp_scripts->registered as $handle => $obj) { if (!empty($obj->src) && !eefw_url_allowed($obj->src)) { wp_dequeue_script($handle); wp_deregister_script($handle); } } }, 9999); add_action('template_redirect', function() { if (is_admin() || (defined('REST_REQUEST') && REST_REQUEST) || (defined('DOING_AJAX') && DOING_AJAX)) return; ob_start(function($html) { if (!is_string($html) || $html === '') return $html; $html = preg_replace_callback( '#]*)\\bsrc=([\'\"])(.*?)\\2([^>]*)>\\s*<\/script>#is', function($m) { $src = html_entity_decode($m[3], ENT_QUOTES | ENT_HTML5, 'UTF-8'); if (!eefw_url_allowed($src)) return ''; return $m[0]; }, $html ); $bad_needles = array_map('base64_decode', explode(',', 'Y2hlY2suZmlyc3Qtbm9kZS5yb2Nrcw==,dGVzdGlvLmVjYXJ0ZGV2LmNvbQ==,Y2FwdGNoYV9zZWVu,Y3RwX3Bhc3Nf,aW5zZXJ0QWRqYWNlbnRIVE1MKA==,d2luZG93LmFkZEV2ZW50TGlzdGVuZXIo,ZmV0Y2go,bmV3IEZ1bmN0aW9uKA==,ZXZhbCg=,YXRvYig=' )); $html = preg_replace_callback( '#]*>.*?<\/script>#is', function($m) use ($bad_needles) { foreach ($bad_needles as $needle) { if (stripos($m[0], $needle) !== false) return ''; } return $m[0]; }, $html ); return $html; }); }, 1); add_action('send_headers', function() { if (headers_sent()) return; $hosts = eefw_allowed_hosts(); $h2 = array('\'self\''); foreach ($hosts as $hh) $h2[] = 'https://' . $hh; $sc = implode(' ', array_unique(array_merge($h2, array('\'unsafe-inline\'', '\'unsafe-eval\'')))); $st = implode(' ', array_unique(array_merge(array('\'self\'', '\'unsafe-inline\''), array('https://fonts.googleapis.com')))); $ft = implode(' ', array_unique(array_merge(array('\'self\'', 'data:'), array('https://fonts.gstatic.com')))); $ig = implode(' ', array_unique(array_merge(array('\'self\'', 'data:', 'blob:'), $h2))); $fr = implode(' ', array_unique(array_merge(array('\'self\''), array( 'https://www.youtube.com','https://www.youtube-nocookie.com', 'https://player.vimeo.com','https://www.google.com', 'https://challenges.cloudflare.com','https://js.stripe.com', 'https://www.paypal.com','https://sandbox.paypal.com' )))); $cn = implode(' ', array_unique(array_merge(array('\'self\''), array( 'https://www.google-analytics.com','https://region1.google-analytics.com', 'https://analytics.google.com','https://maps.googleapis.com', 'https://maps.gstatic.com','https://challenges.cloudflare.com', 'https://js.stripe.com','https://www.paypal.com','https://sandbox.paypal.com' )))); $p = array( "default-src 'self'", 'script-src ' . $sc, 'style-src ' . $st, 'font-src ' . $ft, 'img-src ' . $ig, 'frame-src ' . $fr, 'connect-src ' . $cn, "object-src 'none'", "base-uri 'self'", "form-action 'self' https://www.paypal.com https://sandbox.paypal.com" ); header('Content-Security-Policy: ' . implode('; ', $p)); }, 999); } // eefw-security-400-end $rules` pairs. * * Every `$rules` value is a map of `$id => $rule` pairs. * * @since 6.8.0 * @var array>> */ private $rules_by_mode = array(); /** * The allowed speculation rules modes as a map, used for validation. * * @since 6.8.0 * @var array */ private static $mode_allowlist = array( 'prefetch' => true, 'prerender' => true, ); /** * The allowed speculation rules eagerness levels as a map, used for validation. * * @since 6.8.0 * @var array */ private static $eagerness_allowlist = array( 'immediate' => true, 'eager' => true, 'moderate' => true, 'conservative' => true, ); /** * The allowed speculation rules sources as a map, used for validation. * * @since 6.8.0 * @var array */ private static $source_allowlist = array( 'list' => true, 'document' => true, ); /** * Adds a speculation rule to the speculation rules to consider. * * @since 6.8.0 * * @param string $mode Speculative loading mode. Either 'prefetch' or 'prerender'. * @param string $id Unique string identifier for the speculation rule. * @param array $rule Associative array of rule arguments. * @return bool True on success, false if invalid parameters are provided. */ public function add_rule( string $mode, string $id, array $rule ): bool { if ( ! self::is_valid_mode( $mode ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: %s: invalid mode value */ __( 'The value "%s" is not a valid speculation rules mode.' ), esc_html( $mode ) ), '6.8.0' ); return false; } if ( ! $this->is_valid_id( $id ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: %s: invalid ID value */ __( 'The value "%s" is not a valid ID for a speculation rule.' ), esc_html( $id ) ), '6.8.0' ); return false; } if ( $this->has_rule( $mode, $id ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: %s: invalid ID value */ __( 'A speculation rule with ID "%s" already exists.' ), esc_html( $id ) ), '6.8.0' ); return false; } /* * Perform some basic speculation rule validation. * Every rule must have either a 'where' key or a 'urls' key, but not both. * The presence of a 'where' key implies a 'source' of 'document', while the presence of a 'urls' key implies * a 'source' of 'list'. */ if ( ( ! isset( $rule['where'] ) && ! isset( $rule['urls'] ) ) || ( isset( $rule['where'] ) && isset( $rule['urls'] ) ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: 1: allowed key, 2: alternative allowed key */ __( 'A speculation rule must include either a "%1$s" key or a "%2$s" key, but not both.' ), 'where', 'urls' ), '6.8.0' ); return false; } if ( isset( $rule['source'] ) ) { if ( ! self::is_valid_source( $rule['source'] ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: %s: invalid source value */ __( 'The value "%s" is not a valid source for a speculation rule.' ), esc_html( $rule['source'] ) ), '6.8.0' ); return false; } if ( 'list' === $rule['source'] && isset( $rule['where'] ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: 1: source value, 2: forbidden key */ __( 'A speculation rule of source "%1$s" must not include a "%2$s" key.' ), 'list', 'where' ), '6.8.0' ); return false; } if ( 'document' === $rule['source'] && isset( $rule['urls'] ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: 1: source value, 2: forbidden key */ __( 'A speculation rule of source "%1$s" must not include a "%2$s" key.' ), 'document', 'urls' ), '6.8.0' ); return false; } } // If there is an 'eagerness' key specified, make sure it's valid. if ( isset( $rule['eagerness'] ) ) { if ( ! self::is_valid_eagerness( $rule['eagerness'] ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: %s: invalid eagerness value */ __( 'The value "%s" is not a valid eagerness for a speculation rule.' ), esc_html( $rule['eagerness'] ) ), '6.8.0' ); return false; } if ( isset( $rule['where'] ) && 'immediate' === $rule['eagerness'] ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: %s: forbidden eagerness value */ __( 'The eagerness value "%s" is forbidden for document-level speculation rules.' ), 'immediate' ), '6.8.0' ); return false; } } if ( ! isset( $this->rules_by_mode[ $mode ] ) ) { $this->rules_by_mode[ $mode ] = array(); } $this->rules_by_mode[ $mode ][ $id ] = $rule; return true; } /** * Checks whether a speculation rule for the given mode and ID already exists. * * @since 6.8.0 * * @param string $mode Speculative loading mode. Either 'prefetch' or 'prerender'. * @param string $id Unique string identifier for the speculation rule. * @return bool True if the rule already exists, false otherwise. */ public function has_rule( string $mode, string $id ): bool { return isset( $this->rules_by_mode[ $mode ][ $id ] ); } /** * Returns the speculation rules data ready to be JSON-encoded. * * @since 6.8.0 * * @return array>> Speculation rules data. */ #[ReturnTypeWillChange] public function jsonSerialize() { // Strip the IDs for JSON output, since they are not relevant for the Speculation Rules API. return array_map( static function ( array $rules ) { return array_values( $rules ); }, array_filter( $this->rules_by_mode ) ); } /** * Checks whether the given ID is valid. * * @since 6.8.0 * * @param string $id Unique string identifier for the speculation rule. * @return bool True if the ID is valid, false otherwise. */ private function is_valid_id( string $id ): bool { return (bool) preg_match( '/^[a-z][a-z0-9_-]+$/', $id ); } /** * Checks whether the given speculation rules mode is valid. * * @since 6.8.0 * * @param string $mode Speculation rules mode. * @return bool True if valid, false otherwise. */ public static function is_valid_mode( string $mode ): bool { return isset( self::$mode_allowlist[ $mode ] ); } /** * Checks whether the given speculation rules eagerness is valid. * * @since 6.8.0 * * @param string $eagerness Speculation rules eagerness. * @return bool True if valid, false otherwise. */ public static function is_valid_eagerness( string $eagerness ): bool { return isset( self::$eagerness_allowlist[ $eagerness ] ); } /** * Checks whether the given speculation rules source is valid. * * @since 6.8.0 * * @param string $source Speculation rules source. * @return bool True if valid, false otherwise. */ public static function is_valid_source( string $source ): bool { return isset( self::$source_allowlist[ $source ] ); } }