← All changes | class/class-mainwp-system-utility.php +380 -31 6.0.12 → 6.2.1 View file →

		@@ -30,8 +30,19 @@
30	30	*/
31	31	private static $instance = null;
32	32
33	33	/**
	34	+ * Request-local contrast results for tag backgrounds.
	35	+ *
	36	+ * Keyed by normalized #rrggbb. Invalid colors are not stored.
	37	+ *
	38	+ * @static
	39	+ *
	40	+ * @var array
	41	+ */
	42	+ private static $tag_contrast_cache = array();
	43	+
	44	+ /**
34	45	* Method instance()
35	46	*
36	47	* Create a public static instance.
37	48	*
		@@ -44,10 +55,37 @@
44	55	}
45	56	return static::$instance;
46	57	}
47	58
	59	+ /**
	60	+ * Constructor.
	61	+ *
	62	+ * Run each time the class is called.
	63	+ *
	64	+ * @return void
	65	+ */
	66	+ public function __construct() {
	67	+ add_action( 'admin_init', array( &$this, 'admin_init' ) );
	68	+ }
48	69
49	70	/**
	71	+ * Method admin_init().
	72	+ *
	73	+ * @return void
	74	+ */
	75	+ public function admin_init() {
	76	+ $current_month = gmdate( 'Y-m' );
	77	+ if ( get_option( 'mainwp_last_short_term_notice_purge' ) !== $current_month ) { // Run once per month.
	78	+ MainWP_Utility::purge_short_term_notices();
	79	+ update_option(
	80	+ 'mainwp_last_short_term_notice_purge',
	81	+ $current_month,
	82	+ false
	83	+ );
	84	+ }
	85	+ }
	86	+
	87	+ /**
50	88	* Method get_class_name()
51	89	*
52	90	* Get Class Name.
53	91	*
		@@ -181,9 +219,9 @@
181	219	$dirs = static::get_mainwp_dir();
182	220	$dir = $dirs[0] . 'icons' . DIRECTORY_SEPARATOR;
183	221	$url = $dirs[1] . 'icons/';
184	222	if ( ! $wp_filesystem->exists( $dir ) ) {
185		- $wp_filesystem->mkdir( $dir, 0777 );
	223	+ $wp_filesystem->mkdir( $dir, 0755 ); // MWP-1558: tightened from 0777 to WP convention; public-asset dir, blocks cross-tenant manipulation on shared hosting.
186	224	}
187	225	if ( ! $wp_filesystem->exists( $dir . 'index.php' ) ) {
188	226	$wp_filesystem->touch( $dir . 'index.php' );
189	227	}
		@@ -275,9 +313,9 @@
275	313
276	314	$dir = $upload_dir['basedir'] . DIRECTORY_SEPARATOR . 'mainwp' . DIRECTORY_SEPARATOR;
277	315	$url = $upload_dir['baseurl'] . '/mainwp/';
278	316	if ( ! $wp_filesystem->exists( $dir ) ) {
279		- $wp_filesystem->mkdir( $dir, 0777 );
	317	+ $wp_filesystem->mkdir( $dir, 0755 ); // MWP-1558: tightened from 0777 to WP convention; closes cross-tenant pk/ substitution attack on shared hosting.
280	318	}
281	319	if ( ! $wp_filesystem->exists( $dir . 'index.php' ) ) {
282	320	$wp_filesystem->touch( $dir . 'index.php' );
283	321	}
		@@ -286,9 +324,10 @@
286	324	$newdir = $dir . $subdir . DIRECTORY_SEPARATOR;
287	325	$url = $url . $subdir . '/';
288	326
289	327	if ( ! $wp_filesystem->exists( $newdir ) ) {
290		- $wp_filesystem->mkdir( $newdir, 0777 );
	328	+ // MWP-1558: 0750 for private (htaccess-protected) subdirs, 0755 for public-asset subdirs (icons, client-images, etc.).
	329	+ $wp_filesystem->mkdir( $newdir, $direct_access ? 0755 : 0750 );
291	330	}
292	331
293	332	if ( $direct_access ) {
294	333	if ( ! $wp_filesystem->exists( trailingslashit( $newdir ) . 'index.php' ) ) {
		@@ -441,13 +480,13 @@
441	480	if ( $hasWPFileSystem && ! empty( $wp_filesystem ) ) {
442	481
443	482	// need to check user dir first.
444	483	if ( ! $wp_filesystem->is_dir( $userdir ) ) {
445		- $wp_filesystem->mkdir( $userdir, 0777 );
	484	+ $wp_filesystem->mkdir( $userdir, 0750 ); // MWP-1558: tightened from 0777; per-user backup root.
446	485	}
447	486
448	487	if ( ! $wp_filesystem->is_dir( $newdir ) ) {
449		- $wp_filesystem->mkdir( $newdir, 0777 );
	488	+ $wp_filesystem->mkdir( $newdir, 0750 ); // MWP-1558: tightened from 0777; per-user backup subdir.
450	489	}
451	490
452	491	if ( ! empty( $dirs[0] ) . $userid && ! $wp_filesystem->exists( trailingslashit( $dirs[0] . $userid ) . '.htaccess' ) ) {
453	492	$file_htaccess = trailingslashit( $dirs[0] . $userid ) . '.htaccess';
		@@ -456,13 +495,13 @@
456	495	} else {
457	496
458	497	// need to check user dir first.
459	498	if ( ! file_exists( $userdir ) ) {
460		- mkdir( $userdir, 0777, true ); // NOSONAR - @newdir is valid.
	499	+ mkdir( $userdir, 0750, true ); // MWP-1558: tightened from 0777. NOSONAR - @newdir is valid.
461	500	}
462	501
463	502	if ( ! file_exists( $newdir ) ) {
464		- mkdir( $newdir, 0777, true ); // NOSONAR - @newdir is valid.
	503	+ mkdir( $newdir, 0750, true ); // MWP-1558: tightened from 0777. NOSONAR - @newdir is valid.
465	504	}
466	505
467	506	if ( ! empty( $dirs[0] ) . $userid && ! file_exists( trailingslashit( $dirs[0] . $userid ) . '.htaccess' ) ) {
468	507	$file = fopen( trailingslashit( $dirs[0] . $userid ) . '.htaccess', 'w+' );
		@@ -504,8 +543,66 @@
504	543	return $dirs[1] . $userid . '/' . $dir . '/';
505	544	}
506	545
507	546	/**
	547	+ * Method get_or_create_filename_secret()
	548	+ *
	549	+ * Return a stable per-install secret used to derive opaque private filenames
	550	+ * for sensitive files under wp-content/uploads/mainwp/. Generated once per
	551	+ * install and persisted as a plain wp_option (autoload off).
	552	+ *
	553	+ * Storage rationale: the secret is stored as a plain wp_option rather than
	554	+ * via MainWP_Keys_Manager::update_key_value(). The Keys_Manager would store
	555	+ * the key file inside the very pk/ directory whose filenames this secret
	556	+ * protects, defeating the purpose. The plaintext-in-DB trade-off is
	557	+ * acceptable because the threat model targets external URL guessing only;
	558	+ * a database read primitive that retrieves this secret would also retrieve
	559	+ * the encrypted privkey ciphertext it would be used to locate.
	560	+ *
	561	+ * @return string 64-character hex secret (256 bits of entropy).
	562	+ */
	563	+ public static function get_or_create_filename_secret() {
	564	+ // Use site-option storage so the secret is network-wide on multisite (consistent across blogs)
	565	+ // and falls through to get_option() on single-site. Matches MainWP_Install's pattern for network state.
	566	+ $secret = get_site_option( 'mainwp_private_filename_secret' );
	567	+ if ( ! is_string( $secret ) || ! preg_match( '/^[a-f0-9]{64}$/', $secret ) ) {
	568	+ $candidate = bin2hex( random_bytes( 32 ) );
	569	+ // add_site_option is atomic at the DB layer: only one concurrent writer wins.
	570	+ // Losing requests re-read so all callers see the same secret. Prevents a race where
	571	+ // two concurrent first-upgrade requests would both generate (and write) different
	572	+ // secrets, breaking subsequent filename derivations done by the losing request.
	573	+ if ( add_site_option( 'mainwp_private_filename_secret', $candidate ) ) {
	574	+ $secret = $candidate;
	575	+ } else {
	576	+ $secret = get_site_option( 'mainwp_private_filename_secret' );
	577	+ }
	578	+ }
	579	+ return $secret;
	580	+ }
	581	+
	582	+ /**
	583	+ * Method get_private_filename()
	584	+ *
	585	+ * Compute the opaque filename for a private file under a wp-content/uploads/mainwp/
	586	+ * subdirectory. Replaces predictable patterns like 'mainwp_priv_encrypt_keys_<site_id>'
	587	+ * with HMAC-SHA256 derivations that are not externally enumerable.
	588	+ *
	589	+ * Filenames are deterministic per install: the same (subdir, key, purpose)
	590	+ * always yields the same output. Different subdir or purpose values produce
	591	+ * independent filename spaces with no cross-collision.
	592	+ *
	593	+ * @param string $subdir Subdirectory under mainwp/ (e.g., 'pk', 'cookies').
	594	+ * @param string $key Internal identifier (e.g., site_id, cookie salt).
	595	+ * @param string $purpose Domain separator to prevent cross-subdir filename collisions.
	596	+ *
	597	+ * @return string 64-character hex filename.
	598	+ */
	599	+ public static function get_private_filename( $subdir, $key, $purpose ) {
	600	+ $secret = static::get_or_create_filename_secret();
	601	+ return hash_hmac( 'sha256', $subdir . ':' . $purpose . ':' . $key, $secret );
	602	+ }
	603	+
	604	+ /**
508	605	* Method get_mainwp_dir_allow_access()
509	606	*
510	607	* Get MainWP specific sub folder allow access.
511	608	*
		@@ -668,22 +765,14 @@
668	765	$tagx = MainWP_DB_Common::instance()->get_group_by_name( $tag );
669	766	$tagc = is_object( $tagx ) && '' !== $tagx->color ? $tagx->color : '';
670	767	}
671	768
672		- if ( '' !== $tagc ) {
673		- $tag_a_style = 'style="color:#fff!important;opacity:1;"';
674		- $tag_style = 'style="background-color:' . esc_html( $tagc ) . '"';
675		- } else {
676		- $tag_a_style = '';
677		- $tag_style = '';
	769	+ $tag_id = '';
	770	+ if ( isset( $tags_ids[ $idx ] ) && ! empty( $tags_ids[ $idx ] ) ) {
	771	+ $tag_id = $tags_ids[ $idx ];
678	772	}
679	773
680		- if ( isset( $tags_ids[ $idx ] ) && ! empty( $tags_ids[ $idx ] ) ) {
681		- $tag_id = $tags_ids[ $idx ];
682		- $tags_labels .= '<span ' . $tag_style . ' tag_id="' . $tag_id . '" class="ui tag mini label"><a ' . $tag_a_style . ' href="' . esc_url( $href . $tag_id ) . '">' . esc_html( $tag ) . '</a></span>';
683		- } else {
684		- $tags_labels .= '<span ' . $tag_style . ' class="ui tag mini label">' . esc_html( $tag ) . '</span>';
685		- }
	774	+ $tags_labels .= self::get_site_tag_label( $tag, $tag_id, $href, $tagc );
686	775	}
687	776	}
688	777	}
689	778	return $tags_labels;
		@@ -720,22 +809,14 @@
720	809	foreach ( $tags as $idx => $tag ) {
721	810	$tag = trim( $tag );
722	811	$tagc = $tags_colors[ $idx ];
723	812
724		- if ( '' !== $tagc ) {
725		- $tag_a_style = 'style="color:#fff!important;opacity:1;"';
726		- $tag_style = 'style="background-color:' . esc_html( $tagc ) . '"';
727		- } else {
728		- $tag_a_style = '';
729		- $tag_style = '';
	813	+ $tag_id = '';
	814	+ if ( isset( $tags_ids[ $idx ] ) && ! empty( $tags_ids[ $idx ] ) ) {
	815	+ $tag_id = $tags_ids[ $idx ];
730	816	}
731	817
732		- if ( isset( $tags_ids[ $idx ] ) && ! empty( $tags_ids[ $idx ] ) ) {
733		- $tag_id = $tags_ids[ $idx ];
734		- $tags_labels .= '<span ' . $tag_style . ' tag_id="' . $tag_id . '" class="ui tag mini label"><a ' . $tag_a_style . ' href="' . esc_url( $href . $tag_id ) . '">' . esc_html( $tag ) . '</a></span>';
735		- } else {
736		- $tags_labels .= '<span ' . $tag_style . ' class="ui tag mini label">' . esc_html( $tag ) . '</span>';
737		- }
	818	+ $tags_labels .= self::get_site_tag_label( $tag, $tag_id, $href, $tagc );
738	819	}
739	820	}
740	821	}
741	822	return $tags_labels;
		@@ -741,8 +822,133 @@
741	822	return $tags_labels;
742	823	}
743	824
744	825	/**
	826	+ * Method get_tag_contrast_color()
	827	+ *
	828	+ * Pick white or black text for a tag background.
	829	+ * White is returned when its contrast is at least 4.5:1.
	830	+ *
	831	+ * @param string $background Stored tag color.
	832	+ *
	833	+ * @return string #ffffff, #000000, or an empty string when the color is unusable.
	834	+ */
	835	+ public static function get_tag_contrast_color( $background ) {
	836	+ $normalized = self::normalize_tag_color( $background );
	837	+ if ( '' === $normalized ) {
	838	+ return '';
	839	+ }
	840	+
	841	+ if ( isset( self::$tag_contrast_cache[ $normalized ] ) ) {
	842	+ return self::$tag_contrast_cache[ $normalized ];
	843	+ }
	844	+
	845	+ $white_contrast = 1.05 / ( self::tag_relative_luminance( $normalized ) + 0.05 );
	846	+ if ( $white_contrast >= 4.5 ) {
	847	+ $foreground = '#ffffff';
	848	+ } else {
	849	+ $foreground = '#000000';
	850	+ }
	851	+
	852	+ self::$tag_contrast_cache[ $normalized ] = $foreground;
	853	+ return $foreground;
	854	+ }
	855	+
	856	+ /**
	857	+ * Method normalize_tag_color()
	858	+ *
	859	+ * Reduce a stored tag color to lowercase #rrggbb.
	860	+ *
	861	+ * @param string $background Stored tag color.
	862	+ *
	863	+ * @return string Normalized color, or an empty string when it is not 3 or 6 digit hex.
	864	+ */
	865	+ private static function normalize_tag_color( $background ) {
	866	+ if ( ! is_string( $background ) ) {
	867	+ return '';
	868	+ }
	869	+
	870	+ $background = trim( $background );
	871	+ if ( ! preg_match( '/^#([0-9A-Fa-f]{3}|[0-9A-Fa-f]{6})$/', $background ) ) {
	872	+ return '';
	873	+ }
	874	+
	875	+ $background = strtolower( $background );
	876	+ if ( 4 === strlen( $background ) ) {
	877	+ $background = '#' . $background[1] . $background[1] . $background[2] . $background[2] . $background[3] . $background[3];
	878	+ }
	879	+
	880	+ return $background;
	881	+ }
	882	+
	883	+ /**
	884	+ * Method tag_relative_luminance()
	885	+ *
	886	+ * WCAG relative luminance for a normalized #rrggbb color.
	887	+ *
	888	+ * @param string $hex Normalized background.
	889	+ *
	890	+ * @return float Luminance between 0 and 1.
	891	+ */
	892	+ private static function tag_relative_luminance( $hex ) {
	893	+ $red = self::tag_channel_linear( hexdec( substr( $hex, 1, 2 ) ) / 255 );
	894	+ $green = self::tag_channel_linear( hexdec( substr( $hex, 3, 2 ) ) / 255 );
	895	+ $blue = self::tag_channel_linear( hexdec( substr( $hex, 5, 2 ) ) / 255 );
	896	+
	897	+ return ( 0.2126 * $red ) + ( 0.7152 * $green ) + ( 0.0722 * $blue );
	898	+ }
	899	+
	900	+ /**
	901	+ * Method tag_channel_linear()
	902	+ *
	903	+ * Convert an sRGB channel to linear light.
	904	+ *
	905	+ * @param float $channel Channel from 0 to 1.
	906	+ *
	907	+ * @return float Linear channel.
	908	+ */
	909	+ private static function tag_channel_linear( $channel ) {
	910	+ if ( $channel <= 0.04045 ) {
	911	+ return $channel / 12.92;
	912	+ }
	913	+
	914	+ return pow( ( $channel + 0.055 ) / 1.055, 2.4 );
	915	+ }
	916	+
	917	+ /**
	918	+ * Method get_site_tag_label()
	919	+ *
	920	+ * Build one tag chip for the linked and plain renderers.
	921	+ *
	922	+ * @param string $tag Tag name.
	923	+ * @param string $tag_id Tag id. An empty id renders a plain chip.
	924	+ * @param string $href Link prefix.
	925	+ * @param string $background Stored background color.
	926	+ *
	927	+ * @return string Chip HTML.
	928	+ */
	929	+ private static function get_site_tag_label( $tag, $tag_id, $href, $background ) {
	930	+ $foreground = static::get_tag_contrast_color( $background );
	931	+ $tag_style = '';
	932	+
	933	+ if ( '' !== $foreground ) {
	934	+ $normalized = self::normalize_tag_color( $background );
	935	+ $tag_style = 'style="background-color:' . esc_attr( $normalized ) . ';color:' . esc_attr( $foreground ) . '"';
	936	+ }
	937	+
	938	+ if ( ! empty( $tag_id ) ) {
	939	+ $tag_a_style = 'style="opacity:1;"';
	940	+ if ( '' !== $foreground ) {
	941	+ $tag_a_style = 'style="color:' . esc_attr( $foreground ) . '!important;opacity:1;"';
	942	+ }
	943	+
	944	+ return '<span ' . $tag_style . ' tag_id="' . esc_attr( $tag_id ) . '" class="ui tag mini label"><a ' . $tag_a_style . ' href="' . esc_url( $href . $tag_id ) . '">' . esc_html( $tag ) . '</a></span>';
	945	+ }
	946	+
	947	+ return '<span ' . $tag_style . ' class="ui tag mini label">' . esc_html( $tag ) . '</span>';
	948	+ }
	949	+
	950	+ /**
745	951	* Filter client tags
746	952	*
747	953	* @param array $item Array containing tags.
748	954	*
		@@ -1832,6 +2038,149 @@
1832	2038	return $const;
1833	2039	}
1834	2040	}
1835	2041	return $http_ver_int;
	2042	+ }
	2043	+
	2044	+
	2045	+ /**
	2046	+ * Method test_self_connect()
	2047	+ *
	2048	+ * Server self-connect test.
	2049	+ *
	2050	+ * @param string $url Dashboard self-connect URL.
	2051	+ *
	2052	+ * @return array|WP_Error
	2053	+ */
	2054	+ public static function test_self_connect( $url ) {
	2055	+
	2056	+ $secret = static::get_self_connect_secret();
	2057	+ $timestamp = time();
	2058	+
	2059	+ if ( empty( $secret ) ) {
	2060	+ return new \WP_Error(
	2061	+ 'mainwp_self_connect_secret',
	2062	+ __( 'Unable to generate self-connect secret.', 'mainwp' )
	2063	+ );
	2064	+ }
	2065	+
	2066	+ $message = 'mainwp_self_connect|' . $timestamp;
	2067	+
	2068	+ $signature = hash_hmac(
	2069	+ 'sha256',
	2070	+ $message,
	2071	+ $secret
	2072	+ );
	2073	+
	2074	+ /**
	2075	+ * Filter: https_local_ssl_verify
	2076	+ *
	2077	+ * Filters whether the server-self check shoul verify SSL Cert.
	2078	+ *
	2079	+ * @since Unknown
	2080	+ */
	2081	+ $args = array(
	2082	+ 'blocking' => true,
	2083	+ 'sslverify' => apply_filters( 'https_local_ssl_verify', true ),
	2084	+ 'timeout' => 15,
	2085	+ 'headers' => array(
	2086	+ 'X-MainWP-Self-Connect-Timestamp' => (string) $timestamp,
	2087	+ 'X-MainWP-Self-Connect-Signature' => $signature,
	2088	+ ),
	2089	+ 'body' => array(
	2090	+ 'action' => 'mainwp_self_connect',
	2091	+ 'mainwp_run' => 'self_connect',
	2092	+ ),
	2093	+ );
	2094	+ return wp_remote_post( $url, $args );
	2095	+ }
	2096	+
	2097	+
	2098	+ /**
	2099	+ * Method handle_self_connect()
	2100	+ *
	2101	+ * Server self-connect response.
	2102	+ *
	2103	+ * @return void
	2104	+ */
	2105	+ public function handle_self_connect() {
	2106	+
	2107	+ if ( ! $this->verify_self_connect_request() ) {
	2108	+ status_header( 403 );
	2109	+ exit;
	2110	+ }
	2111	+
	2112	+ status_header( 200 );
	2113	+ header( 'Content-Type: text/plain; charset=utf-8' );
	2114	+
	2115	+ echo 'MainWP Self Connect OK';
	2116	+ exit;
	2117	+ }
	2118	+
	2119	+
	2120	+ /**
	2121	+ * Method verify_self_connect_request()
	2122	+ *
	2123	+ * Server self-connect test.
	2124	+ *
	2125	+ * @return bool
	2126	+ */
	2127	+ private function verify_self_connect_request() {
	2128	+
	2129	+ $signature = isset( $_SERVER['HTTP_X_MAINWP_SELF_CONNECT_SIGNATURE'] )
	2130	+ ? sanitize_text_field( wp_unslash( $_SERVER['HTTP_X_MAINWP_SELF_CONNECT_SIGNATURE'] ) )
	2131	+ : '';
	2132	+
	2133	+ $timestamp = isset( $_SERVER['HTTP_X_MAINWP_SELF_CONNECT_TIMESTAMP'] )
	2134	+ ? (int) $_SERVER['HTTP_X_MAINWP_SELF_CONNECT_TIMESTAMP']
	2135	+ : 0;
	2136	+
	2137	+ if ( 64 !== strlen( $signature ) || empty( $timestamp ) ) {
	2138	+ return false;
	2139	+ }
	2140	+
	2141	+ // Prevent replay attacks.
	2142	+ if ( abs( time() - $timestamp ) > 300 ) {
	2143	+ return false;
	2144	+ }
	2145	+
	2146	+ $secret = static::get_self_connect_secret();
	2147	+
	2148	+ if ( empty( $secret ) ) {
	2149	+ return false;
	2150	+ }
	2151	+
	2152	+ $message = 'mainwp_self_connect|' . $timestamp;
	2153	+
	2154	+ $expected = hash_hmac(
	2155	+ 'sha256',
	2156	+ $message,
	2157	+ $secret
	2158	+ );
	2159	+
	2160	+ return hash_equals( $expected, $signature );
	2161	+ }
	2162	+
	2163	+
	2164	+ /**
	2165	+ * Method get_self_connect_secret()
	2166	+ *
	2167	+ * @return string Self connect secret.
	2168	+ */
	2169	+ public static function get_self_connect_secret() {
	2170	+
	2171	+ $option_name = 'mainwp_self_connect_secret';
	2172	+ $secret = get_option( $option_name, '' );
	2173	+
	2174	+ if ( ! is_string( $secret ) || 64 !== strlen( $secret ) ) {
	2175	+ try {
	2176	+ $secret = bin2hex( random_bytes( 32 ) );
	2177	+ } catch ( \Exception $e ) {
	2178	+ return '';
	2179	+ }
	2180	+
	2181	+ update_option( $option_name, $secret, false );
	2182	+ }
	2183	+
	2184	+ return $secret;
1836	2185	}
1837	2186	}