|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* This file is part of the Shieldon package. |
|
4
|
|
|
* |
|
5
|
|
|
* (c) Terry L. <[email protected]> |
|
6
|
|
|
* |
|
7
|
|
|
* For the full copyright and license information, please view the LICENSE |
|
8
|
|
|
* file that was distributed with this source code. |
|
9
|
|
|
* |
|
10
|
|
|
* php version 7.1.0 |
|
11
|
|
|
* |
|
12
|
|
|
* @category Web-security |
|
13
|
|
|
* @package Shieldon |
|
14
|
|
|
* @author Terry Lin <[email protected]> |
|
15
|
|
|
* @copyright 2019 terrylinooo |
|
16
|
|
|
* @license https://github.com/terrylinooo/shieldon/blob/2.x/LICENSE MIT |
|
17
|
|
|
* @link https://github.com/terrylinooo/shieldon |
|
18
|
|
|
* @see https://shieldon.io |
|
19
|
|
|
*/ |
|
20
|
|
|
|
|
21
|
|
|
declare(strict_types=1); |
|
22
|
|
|
|
|
23
|
|
|
namespace Shieldon\Firewall\Firewall; |
|
24
|
|
|
|
|
25
|
|
|
use Shieldon\Security\Xss; |
|
26
|
|
|
|
|
27
|
|
|
use function array_keys; |
|
28
|
|
|
|
|
29
|
|
|
/* |
|
30
|
|
|
* Xss Protection Trait is loaded in Firewall instance only. |
|
31
|
|
|
*/ |
|
32
|
|
|
trait XssProtectionTrait |
|
33
|
|
|
{ |
|
34
|
|
|
/** |
|
35
|
|
|
* Get options from the configuration file. |
|
36
|
|
|
* This method is same as `$this->getConfig()` but returning value from array directly. |
|
37
|
|
|
* |
|
38
|
|
|
* @param string $option The option of the section in the the configuration. |
|
39
|
|
|
* @param string $section The section in the configuration. |
|
40
|
|
|
* |
|
41
|
|
|
* @return mixed |
|
42
|
|
|
*/ |
|
43
|
|
|
abstract protected function getOption(string $option, string $section = ''); |
|
44
|
|
|
|
|
45
|
|
|
/** |
|
46
|
|
|
* Set up the XSS protection. |
|
47
|
|
|
* |
|
48
|
|
|
* @return void |
|
49
|
|
|
*/ |
|
50
|
|
|
protected function setupXssProtection(): void |
|
51
|
|
|
{ |
|
52
|
|
|
$enable = $this->getOption('xss_protection'); |
|
53
|
|
|
$protectedList = $this->getOption('xss_protected_list'); |
|
54
|
|
|
$key = array_search(true, $enable); |
|
55
|
|
|
|
|
56
|
|
|
if (empty($key) && empty($protectedList)) { |
|
57
|
|
|
return; |
|
58
|
|
|
} |
|
59
|
|
|
|
|
60
|
|
|
$xss = new Xss(); |
|
61
|
|
|
|
|
62
|
|
|
$this->cleanPost($enable, $xss); |
|
63
|
|
|
$this->cleanGet($enable, $xss); |
|
64
|
|
|
$this->cleanCookie($enable, $xss); |
|
65
|
|
|
$this->cleanProtectedList($protectedList, $xss); |
|
66
|
|
|
} |
|
67
|
|
|
|
|
68
|
|
|
/** |
|
69
|
|
|
* Clean the $_POST superglobal. |
|
70
|
|
|
* |
|
71
|
|
|
* @param array $enable The option to enable filtering $_POST. |
|
72
|
|
|
* @param Xss $xss The Xss instance. |
|
73
|
|
|
* |
|
74
|
|
|
* @return void |
|
75
|
|
|
*/ |
|
76
|
|
|
private function cleanPost(array $enable, Xss $xss): void |
|
77
|
|
|
{ |
|
78
|
|
|
if ($enable['post']) { |
|
79
|
|
|
|
|
80
|
|
|
$this->kernel->setClosure( |
|
81
|
|
|
'xss_post', |
|
82
|
|
|
function () use ($xss) { |
|
83
|
|
|
if (!empty($_POST)) { |
|
84
|
|
|
foreach (array_keys($_POST) as $k) { |
|
85
|
|
|
$_POST[$k] = $xss->clean($_POST[$k]); |
|
86
|
|
|
} |
|
87
|
|
|
} |
|
88
|
|
|
} |
|
89
|
|
|
); |
|
90
|
|
|
} |
|
91
|
|
|
} |
|
92
|
|
|
|
|
93
|
|
|
/** |
|
94
|
|
|
* Clean the $_GET superglobal. |
|
95
|
|
|
* |
|
96
|
|
|
* @param array $enable The option to enable filtering $_GET. |
|
97
|
|
|
* @param Xss $xss The Xss instance. |
|
98
|
|
|
* |
|
99
|
|
|
* @return void |
|
100
|
|
|
*/ |
|
101
|
|
|
private function cleanGet(array $enable, Xss $xss): void |
|
102
|
|
|
{ |
|
103
|
|
|
if ($enable['get']) { |
|
104
|
|
|
|
|
105
|
|
|
$this->kernel->setClosure( |
|
106
|
|
|
'xss_get', |
|
107
|
|
|
function () use ($xss) { |
|
108
|
|
|
if (!empty($_GET)) { |
|
109
|
|
|
foreach (array_keys($_GET) as $k) { |
|
110
|
|
|
$_GET[$k] = $xss->clean($_GET[$k]); |
|
111
|
|
|
} |
|
112
|
|
|
} |
|
113
|
|
|
} |
|
114
|
|
|
); |
|
115
|
|
|
} |
|
116
|
|
|
} |
|
117
|
|
|
|
|
118
|
|
|
/** |
|
119
|
|
|
* Clean the $_COOKIE superglobal. |
|
120
|
|
|
* |
|
121
|
|
|
* @param array $enable The option to enable filtering $_COOKIE. |
|
122
|
|
|
* @param Xss $xss The Xss instance. |
|
123
|
|
|
* |
|
124
|
|
|
* @return void |
|
125
|
|
|
*/ |
|
126
|
|
|
private function cleanCookie(array $enable, Xss $xss): void |
|
127
|
|
|
{ |
|
128
|
|
|
if ($enable['cookie']) { |
|
129
|
|
|
|
|
130
|
|
|
$this->kernel->setClosure( |
|
131
|
|
|
'xss_cookie', |
|
132
|
|
|
function () use ($xss) { |
|
133
|
|
|
if (!empty($_COOKIE)) { |
|
134
|
|
|
foreach (array_keys($_COOKIE) as $k) { |
|
135
|
|
|
$_COOKIE[$k] = $xss->clean($_COOKIE[$k]); |
|
136
|
|
|
} |
|
137
|
|
|
} |
|
138
|
|
|
} |
|
139
|
|
|
); |
|
140
|
|
|
} |
|
141
|
|
|
} |
|
142
|
|
|
|
|
143
|
|
|
/** |
|
144
|
|
|
* Clean the specific protected varibles. |
|
145
|
|
|
* |
|
146
|
|
|
* @param array $protectedList The specific variables to be filtered. |
|
147
|
|
|
* @param Xss $xss The Xss instance. |
|
148
|
|
|
* |
|
149
|
|
|
* @return void |
|
150
|
|
|
*/ |
|
151
|
|
|
private function cleanProtectedList(array $protectedList, Xss $xss): void |
|
152
|
|
|
{ |
|
153
|
|
|
if (!empty($protectedList)) { |
|
154
|
|
|
|
|
155
|
|
|
$this->kernel->setClosure( |
|
156
|
|
|
'xss_protection', |
|
157
|
|
|
function () use ($xss, $protectedList) { |
|
158
|
|
|
foreach ($protectedList as $v) { |
|
159
|
|
|
$k = $v['variable'] ?? 'undefined'; |
|
160
|
|
|
|
|
161
|
|
|
switch ($v['type']) { |
|
162
|
|
|
case 'get': |
|
163
|
|
|
if (!empty($_GET[$k])) { |
|
164
|
|
|
$_GET[$k] = $xss->clean($_GET[$k]); |
|
165
|
|
|
} |
|
166
|
|
|
break; |
|
167
|
|
|
|
|
168
|
|
|
case 'post': |
|
169
|
|
|
if (!empty($_POST[$k])) { |
|
170
|
|
|
$_POST[$k] = $xss->clean($_POST[$k]); |
|
171
|
|
|
} |
|
172
|
|
|
break; |
|
173
|
|
|
|
|
174
|
|
|
case 'cookie': |
|
175
|
|
|
if (!empty($_COOKIE[$k])) { |
|
176
|
|
|
$_COOKIE[$k] = $xss->clean($_COOKIE[$k]); |
|
177
|
|
|
} |
|
178
|
|
|
break; |
|
179
|
|
|
} |
|
180
|
|
|
} |
|
181
|
|
|
} |
|
182
|
|
|
); |
|
183
|
|
|
} |
|
184
|
|
|
} |
|
185
|
|
|
} |
|
186
|
|
|
|
terrylinooo /
shieldon
