class.jetpack-data.php — Jetpack – WP Security, Backup, Speed, & Growth 3.7.5

jetpack / class.jetpack-data.php

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class.jetpack-data.php

126 lines

1	<?php
2
3	class Jetpack_Data {
4	/**
5	* Gets locally stored token
6	*
7	* @return object\|false
8	*/
9	public static function get_access_token( $user_id = false ) {
10	if ( $user_id ) {
11	if ( !$tokens = Jetpack_Options::get_option( 'user_tokens' ) ) {
12	return false;
13	}
14	if ( $user_id === JETPACK_MASTER_USER ) {
15	if ( !$user_id = Jetpack_Options::get_option( 'master_user' ) ) {
16	return false;
17	}
18	}
19	if ( !isset( $tokens[$user_id] ) \|\| !$token = $tokens[$user_id] ) {
20	return false;
21	}
22	$token_chunks = explode( '.', $token );
23	if ( empty( $token_chunks[1] ) \|\| empty( $token_chunks[2] ) ) {
24	return false;
25	}
26	if ( $user_id != $token_chunks[2] ) {
27	return false;
28	}
29	$token = "{$token_chunks[0]}.{$token_chunks[1]}";
30	} else {
31	$token = Jetpack_Options::get_option( 'blog_token' );
32	if ( empty( $token ) ) {
33	return false;
34	}
35	}
36
37	return (object) array(
38	'secret' => $token,
39	'external_user_id' => (int) $user_id,
40	);
41	}
42
43	/**
44	* This function mirrors Jetpack_Data::is_usable_domain() in the WPCOM codebase.
45	*
46	* @param $domain
47	* @param array $extra
48	*
49	* @return bool\|WP_Error
50	*/
51	public static function is_usable_domain( $domain, $extra = array() ) {
52
53	// If it's empty, just fail out.
54	if ( ! $domain ) {
55	return new WP_Error( 'fail_domain_empty', sprintf( __( 'Domain `%1$s` just failed is_usable_domain check as it is empty.', 'jetpack' ), $domain ) );
56	}
57
58	// None of the explicit localhosts.
59	$forbidden_domains = array(
60	'wordpress.com',
61	'localhost',
62	'localhost.localdomain',
63	'127.0.0.1',
64	'local.wordpress.dev', // VVV
65	'local.wordpress-trunk.dev', // VVV
66	'src.wordpress-develop.dev', // VVV
67	'build.wordpress-develop.dev', // VVV
68	);
69	if ( in_array( $domain, $forbidden_domains ) ) {
70	return new WP_Error( 'fail_domain_forbidden', sprintf( __( 'Domain `%1$s` just failed is_usable_domain check as it is in the forbidden array.', 'jetpack' ), $domain ) );
71	}
72
73	// No .dev or .local domains
74	if ( preg_match( '#\.(dev\|local)$#i', $domain ) ) {
75	return new WP_Error( 'fail_domain_tld', sprintf( __( 'Domain `%1$s` just failed is_usable_domain check as it uses an invalid top level domain.', 'jetpack' ), $domain ) );
76	}
77
78	// No WPCOM subdomains
79	if ( preg_match( '#\.wordpress\.com$#i', $domain ) ) {
80	return new WP_Error( 'fail_subdomain_wpcom', sprintf( __( 'Domain `%1$s` just failed is_usable_domain check as it is a subdomain of WordPress.com.', 'jetpack' ), $domain ) );
81	}
82
83	// If PHP was compiled without support for the Filter module (very edge case)
84	if ( ! function_exists( 'filter_var' ) ) {
85	// Just pass back true for now, and let wpcom sort it out.
86	return true;
87	}
88
89	// Check the IP to make sure it's pingable.
90	$ip = gethostbyname( $domain );
91
92	// Doing this again as I was getting some false positives when gethostbyname() flaked out and returned the domain.
93	$ip = filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 ) ? $ip : gethostbyname( $ip );
94
95	if ( ! filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE \| FILTER_FLAG_NO_RES_RANGE \| FILTER_FLAG_IPV4 ) && ! self::php_bug_66229_check( $ip ) ) {
96	return new WP_Error( 'fail_domain_bad_ip_range', sprintf( __( 'Domain `%1$s` just failed is_usable_domain check as its IP `%2$s` is either invalid, or in a reserved or private range.', 'jetpack' ), $domain, $ip ) );
97	}
98
99	return true;
100	}
101
102	/**
103	* Returns true if the IP address passed in should not be in a reserved range, even if PHP says that it is.
104	* See: https://bugs.php.net/bug.php?id=66229 and https://github.com/php/php-src/commit/d1314893fd1325ca6aa0831101896e31135a2658
105	*
106	* This function mirrors Jetpack_Data::php_bug_66229_check() in the WPCOM codebase.
107	*/
108	public static function php_bug_66229_check( $ip ) {
109	if ( ! filter_var( $ip, FILTER_VALIDATE_IP ) ) {
110	return false;
111	}
112
113	$ip_arr = array_map( 'intval', explode( '.', $ip ) );
114
115	if ( 128 == $ip_arr[0] && 0 == $ip_arr[1] ) {
116	return true;
117	}
118
119	if ( 191 == $ip_arr[0] && 255 == $ip_arr[1] ) {
120	return true;
121	}
122
123	return false;
124	}
125	}
126