class-server.php — Really Simple Security – Simple and Performant Security (formerly Really Simple SSL) 9.4.1

really-simple-ssl / class-server.php

really-simple-ssl Last commit date

class-server.php

190 lines

1	<?php
2	defined( 'ABSPATH' ) or die( 'you do not have access to this page!' );
3
4	if ( ! class_exists( 'rsssl_server' ) ) {
5	class rsssl_server {
6	private static $_this;
7	private $sapi = false;
8
9	public function __construct() {
10	if ( isset( self::$_this ) ) {
11	wp_die( 'you cannot create a second instance.' );
12	}
13	self::$_this = $this;
14	}
15
16	public static function this() {
17	return self::$_this;
18	}
19
20	/**
21	* @Since 2.5.1
22	* Checks if the server uses .htaccess
23	* @return bool
24	*/
25
26	public function uses_htaccess() {
27	// No .htaccess on WP Engine
28	if ( function_exists( 'is_wpe' ) && is_wpe() ) {
29	return false;
30	}
31
32	if ( $this->get_server() === 'apache' \|\| $this->get_server() === 'litespeed' ) {
33	return true;
34	}
35
36	return false;
37	}
38
39	/**
40	* Returns the server type of the plugin user.
41	*
42	* @return string\|bool server type the user is using of false if undetectable.
43	*/
44
45	public function get_server() {
46	//Allows to override server authentication for testing or other reasons.
47	if ( defined( 'RSSSL_SERVER_OVERRIDE' ) ) {
48	return RSSSL_SERVER_OVERRIDE;
49	}
50
51	$server_raw = strtolower( htmlspecialchars( $_SERVER['SERVER_SOFTWARE'] ) );
52	if ( strpos( $server_raw, 'apache' ) !== false ) {
53	return 'apache';
54	} elseif ( strpos( $server_raw, 'nginx' ) !== false ) {
55	return 'nginx';
56	} elseif ( strpos( $server_raw, 'litespeed' ) !== false ) {
57	return 'litespeed';
58	} elseif ( strpos( $server_raw, 'openresty' ) !== false ) {
59	return 'openresty';
60	} elseif ( strpos( $server_raw, 'microsoft-iis' ) !== false ) {
61	return 'microsoft-iis';
62	} else { //unsupported server
63	return false;
64	}
65	}
66
67	/**
68	* Get the Auto prepend configuration
69	*
70	* @return string
71	*/
72	public function auto_prepend_config(): string
73	{
74	$return = '';
75	if ( $this->isApacheModPHP() ){
76	$return = "apache-mod_php"; //Apache _ modphp
77	} else if ( $this->isApacheSuPHP() ) {
78	$return = "apache-suphp"; //Apache + SuPHP
79	} else if ( $this->isApache() && !$this->isApacheSuPHP() && ($this->isCGI() \|\| $this->isFastCGI()) ) {
80	$return = "cgi"; //Apache + CGI/FastCGI
81	} else if ($this->isLiteSpeed()){
82	$return = "litespeed";
83	} else if ( $this->isNGINX() ) {
84	$return = "nginx";
85	} else if ( $this->isIIS() ) {
86	$return = "iis";
87	} else {
88	$return = "apache-mod_php";
89	}
90	update_option('rsssl_auto_prepend_config', $return, true);
91	return $return;
92	}
93
94	/**
95	* If Apache
96	* @return bool
97	*/
98	public function isApache():bool {
99	return $this->get_server() === 'apache';
100	}
101
102	/**
103	* If NGINX
104	* @return bool
105	*/
106	public function isNGINX():bool {
107	return $this->get_server() === 'nginx';
108	}
109
110	/**
111	* If Litespeed
112	* @return bool
113	*/
114	public function isLiteSpeed():bool {
115	return $this->get_server() === 'litespeed';
116	}
117
118	/**
119	* If IIS
120	* @return bool
121	*/
122	public function isIIS():bool {
123	return $this->get_server() === 'iis';
124	}
125
126	/**
127	* If ModPHP
128	* @return bool
129	*/
130	public function isApacheModPHP():bool {
131	return $this->isApache() && function_exists('apache_get_modules');
132	}
133
134	/**
135	* If SupPHP
136	* Not sure if this can be implemented at the PHP level.
137	* @return bool
138	*/
139	public function isApacheSuPHP():bool {
140	return $this->isApache() && $this->isCGI() &&
141	function_exists('posix_getuid') &&
142	getmyuid() === posix_getuid();
143	}
144
145	/**
146	* If CGI
147	* @return bool
148	*/
149	public function isCGI():bool {
150	return !$this->isFastCGI() && stripos($this->sapi(), 'cgi') !== false;
151	}
152
153	/**
154	* If FastCGI
155	* @return bool
156	*/
157	public function isFastCGI():bool {
158	return stripos($this->sapi(), 'fastcgi') !== false \|\| stripos($this->sapi(), 'fpm-fcgi') !== false;
159	}
160
161
162	/**
163	* If Sapi
164	* @return bool\|string
165	*/
166	private function sapi(){
167	if ( !$this->sapi ) {
168	$this->sapi = function_exists('php_sapi_name') ? php_sapi_name() : 'false';
169	}
170	if ( 'false' === $this->sapi ) {
171	return false;
172	}
173	return $this->sapi;
174	}
175
176	/**
177	* Check if the apache version is at least 2.4
178	* @return bool
179	*/
180	public function apache_version_min_24() {
181	$version = $_SERVER['SERVER_SOFTWARE'] ?? false;
182	//check if version is higher then 2.4.
183	if ( preg_match( '/Apache\/(2\.[4-9])/', $version, $matches ) ) {
184	return true;
185	}
186	return false;
187	}
188	} //class closure
189	}
190