|
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
|
|
|
|
|
11
|
|
|
declare(strict_types=1); |
|
12
|
|
|
|
|
13
|
|
|
namespace Shieldon\Firewall\Kernel; |
|
14
|
|
|
|
|
15
|
|
|
use function Shieldon\Firewall\get_request; |
|
16
|
|
|
use function Shieldon\Firewall\get_session; |
|
17
|
|
|
use function Shieldon\Firewall\unset_superglobal; |
|
18
|
|
|
|
|
19
|
|
|
/* |
|
20
|
|
|
* This trait is used on Kernel only. |
|
21
|
|
|
*/ |
|
22
|
|
|
trait FilterTrait |
|
23
|
|
|
{ |
|
24
|
|
|
/** |
|
25
|
|
|
* Enable or disable the filters. |
|
26
|
|
|
* |
|
27
|
|
|
* @var array |
|
28
|
|
|
*/ |
|
29
|
|
|
protected $filterStatus = [ |
|
30
|
|
|
/** |
|
31
|
|
|
* Check how many pageviews an user made in a short period time. |
|
32
|
|
|
* For example, limit an user can only view 30 pages in 60 minutes. |
|
33
|
|
|
*/ |
|
34
|
|
|
'frequency' => true, |
|
35
|
|
|
|
|
36
|
|
|
/** |
|
37
|
|
|
* If an user checks any internal link on your website, the user's |
|
38
|
|
|
* browser will generate HTTP_REFERER information. |
|
39
|
|
|
* When a user view many pages without HTTP_REFERER information meaning |
|
40
|
|
|
* that the user MUST be a web crawler. |
|
41
|
|
|
*/ |
|
42
|
|
|
'referer' => false, |
|
43
|
|
|
|
|
44
|
|
|
/** |
|
45
|
|
|
* Most of web crawlers do not render JavaScript, they only get the |
|
46
|
|
|
* content they want, so we can check whether the cookie can be created |
|
47
|
|
|
* by JavaScript or not. |
|
48
|
|
|
*/ |
|
49
|
|
|
'cookie' => false, |
|
50
|
|
|
|
|
51
|
|
|
/** |
|
52
|
|
|
* Every unique user should only has a unique session, but if a user |
|
53
|
|
|
* creates different sessions every connection... meaning that the |
|
54
|
|
|
* user's browser doesn't support cookie. |
|
55
|
|
|
* It is almost impossible that modern browsers not support cookie, |
|
56
|
|
|
* therefore the user MUST be a web crawler. |
|
57
|
|
|
*/ |
|
58
|
|
|
'session' => false, |
|
59
|
|
|
]; |
|
60
|
|
|
|
|
61
|
|
|
/** |
|
62
|
|
|
* The status for Filters to reset. |
|
63
|
|
|
* |
|
64
|
|
|
* @var array |
|
65
|
|
|
*/ |
|
66
|
|
|
protected $filterResetStatus = [ |
|
67
|
|
|
's' => false, // second. |
|
68
|
|
|
'm' => false, // minute. |
|
69
|
|
|
'h' => false, // hour. |
|
70
|
|
|
'd' => false, // day. |
|
71
|
|
|
]; |
|
72
|
|
|
|
|
73
|
|
|
/** |
|
74
|
|
|
* Filter - Referer. |
|
75
|
|
|
* |
|
76
|
|
|
* @param array $logData IP data from Shieldon log table. |
|
77
|
|
|
* @param array $ipData The IP log data. |
|
78
|
|
|
* @param bool $isFlagged Is flagged as unusual behavior or not. |
|
79
|
|
|
* |
|
80
|
|
|
* @return array |
|
81
|
|
|
*/ |
|
82
|
|
|
protected function filterReferer(array $logData, array $ipDetail, bool $isFlagged): array |
|
83
|
|
|
{ |
|
84
|
|
|
$isReject = false; |
|
85
|
|
|
|
|
86
|
|
|
if ($this->filterStatus['referer']) { |
|
87
|
|
|
|
|
88
|
|
|
if ($logData['last_time'] - $ipDetail['last_time'] > $this->properties['interval_check_referer']) { |
|
89
|
|
|
|
|
90
|
|
|
// Get values from data table. We will count it and save it back to data table. |
|
91
|
|
|
// If an user is already in your website, it is impossible no referer when he views other pages. |
|
92
|
|
|
$logData['flag_empty_referer'] = $ipDetail['flag_empty_referer'] ?? 0; |
|
93
|
|
|
|
|
94
|
|
|
if (empty(get_request()->getHeaderLine('referer'))) { |
|
95
|
|
|
$logData['flag_empty_referer']++; |
|
96
|
|
|
$isFlagged = true; |
|
97
|
|
|
} |
|
98
|
|
|
|
|
99
|
|
|
// Ban this IP if they reached the limit. |
|
100
|
|
|
if ($logData['flag_empty_referer'] > $this->properties['limit_unusual_behavior']['referer']) { |
|
101
|
|
|
$this->action( |
|
|
|
|
|
|
102
|
|
|
self::ACTION_TEMPORARILY_DENY, |
|
|
|
|
|
|
103
|
|
|
self::REASON_EMPTY_REFERER |
|
|
|
|
|
|
104
|
|
|
); |
|
105
|
|
|
$isReject = true; |
|
106
|
|
|
} |
|
107
|
|
|
} |
|
108
|
|
|
} |
|
109
|
|
|
|
|
110
|
|
|
return [ |
|
111
|
|
|
'is_flagged' => $isFlagged, |
|
112
|
|
|
'is_reject' => $isReject, |
|
113
|
|
|
'log_data' => $logData, |
|
114
|
|
|
]; |
|
115
|
|
|
} |
|
116
|
|
|
|
|
117
|
|
|
/** |
|
118
|
|
|
* Filter - Session |
|
119
|
|
|
* |
|
120
|
|
|
* @param array $logData IP data from Shieldon log table. |
|
121
|
|
|
* @param array $ipData The IP log data. |
|
122
|
|
|
* @param bool $isFlagged Is flagged as unusual behavior or not. |
|
123
|
|
|
* |
|
124
|
|
|
* @return array |
|
125
|
|
|
*/ |
|
126
|
|
|
protected function filterSession(array $logData, array $ipDetail, bool $isFlagged): array |
|
127
|
|
|
{ |
|
128
|
|
|
$isReject = false; |
|
129
|
|
|
|
|
130
|
|
|
if ($this->filterStatus['session']) { |
|
131
|
|
|
|
|
132
|
|
|
if ($logData['last_time'] - $ipDetail['last_time'] > $this->properties['interval_check_session']) { |
|
133
|
|
|
|
|
134
|
|
|
// Get values from data table. We will count it and save it back to data table. |
|
135
|
|
|
$logData['flag_multi_session'] = $ipDetail['flag_multi_session'] ?? 0; |
|
136
|
|
|
|
|
137
|
|
|
if (get_session()->get('id') !== $ipDetail['session']) { |
|
138
|
|
|
|
|
139
|
|
|
// Is is possible because of direct access by the same user many times. |
|
140
|
|
|
// Or they don't have session cookie set. |
|
141
|
|
|
$logData['flag_multi_session']++; |
|
142
|
|
|
$isFlagged = true; |
|
143
|
|
|
} |
|
144
|
|
|
|
|
145
|
|
|
// Ban this IP if they reached the limit. |
|
146
|
|
|
if ($logData['flag_multi_session'] > $this->properties['limit_unusual_behavior']['session']) { |
|
147
|
|
|
$this->action( |
|
148
|
|
|
self::ACTION_TEMPORARILY_DENY, |
|
|
|
|
|
|
149
|
|
|
self::REASON_TOO_MANY_SESSIONS |
|
|
|
|
|
|
150
|
|
|
); |
|
151
|
|
|
$isReject = true; |
|
152
|
|
|
} |
|
153
|
|
|
} |
|
154
|
|
|
} |
|
155
|
|
|
|
|
156
|
|
|
|
|
157
|
|
|
return [ |
|
158
|
|
|
'is_flagged' => $isFlagged, |
|
159
|
|
|
'is_reject' => $isReject, |
|
160
|
|
|
'log_data' => $logData, |
|
161
|
|
|
]; |
|
162
|
|
|
} |
|
163
|
|
|
|
|
164
|
|
|
/** |
|
165
|
|
|
* Filter - Cookie |
|
166
|
|
|
* |
|
167
|
|
|
* @param array $logData IP data from Shieldon log table. |
|
168
|
|
|
* @param array $ipData The IP log data. |
|
169
|
|
|
* @param bool $isFlagged Is flagged as unusual behavior or not. |
|
170
|
|
|
* |
|
171
|
|
|
* @return array |
|
172
|
|
|
*/ |
|
173
|
|
|
protected function filterCookie(array $logData, array $ipDetail, bool $isFlagged): array |
|
174
|
|
|
{ |
|
175
|
|
|
$isReject = false; |
|
176
|
|
|
|
|
177
|
|
|
// Let's checking cookie created by javascript.. |
|
178
|
|
|
if ($this->filterStatus['cookie']) { |
|
179
|
|
|
|
|
180
|
|
|
// Get values from data table. We will count it and save it back to data table. |
|
181
|
|
|
$logData['flag_js_cookie'] = $ipDetail['flag_js_cookie'] ?? 0; |
|
182
|
|
|
$logData['pageviews_cookie'] = $ipDetail['pageviews_cookie'] ?? 0; |
|
183
|
|
|
|
|
184
|
|
|
$c = $this->properties['cookie_name']; |
|
185
|
|
|
|
|
186
|
|
|
$jsCookie = get_request()->getCookieParams()[$c] ?? 0; |
|
187
|
|
|
|
|
188
|
|
|
// Checking if a cookie is created by JavaScript. |
|
189
|
|
|
if (!empty($jsCookie)) { |
|
190
|
|
|
|
|
191
|
|
|
if ($jsCookie == '1') { |
|
192
|
|
|
$logData['pageviews_cookie']++; |
|
193
|
|
|
|
|
194
|
|
|
} else { |
|
195
|
|
|
// Flag it if the value is not 1. |
|
196
|
|
|
$logData['flag_js_cookie']++; |
|
197
|
|
|
$isFlagged = true; |
|
198
|
|
|
} |
|
199
|
|
|
} else { |
|
200
|
|
|
// If we cannot find the cookie, flag it. |
|
201
|
|
|
$logData['flag_js_cookie']++; |
|
202
|
|
|
$isFlagged = true; |
|
203
|
|
|
} |
|
204
|
|
|
|
|
205
|
|
|
if ($logData['flag_js_cookie'] > $this->properties['limit_unusual_behavior']['cookie']) { |
|
206
|
|
|
|
|
207
|
|
|
// Ban this IP if they reached the limit. |
|
208
|
|
|
$this->action( |
|
209
|
|
|
self::ACTION_TEMPORARILY_DENY, |
|
|
|
|
|
|
210
|
|
|
self::REASON_EMPTY_JS_COOKIE |
|
|
|
|
|
|
211
|
|
|
); |
|
212
|
|
|
$isReject = true; |
|
213
|
|
|
} |
|
214
|
|
|
|
|
215
|
|
|
// Remove JS cookie and reset. |
|
216
|
|
|
if ($logData['pageviews_cookie'] > $this->properties['limit_unusual_behavior']['cookie']) { |
|
217
|
|
|
$logData['pageviews_cookie'] = 0; // Reset to 0. |
|
218
|
|
|
$logData['flag_js_cookie'] = 0; |
|
219
|
|
|
unset_superglobal($c, 'cookie'); |
|
220
|
|
|
} |
|
221
|
|
|
} |
|
222
|
|
|
|
|
223
|
|
|
return [ |
|
224
|
|
|
'is_flagged' => $isFlagged, |
|
225
|
|
|
'is_reject' => $isReject, |
|
226
|
|
|
'log_data' => $logData, |
|
227
|
|
|
]; |
|
228
|
|
|
} |
|
229
|
|
|
|
|
230
|
|
|
/** |
|
231
|
|
|
* Filter - Frequency |
|
232
|
|
|
* |
|
233
|
|
|
* @param array $logData IP data from Shieldon log table. |
|
234
|
|
|
* @param array $ipData The IP log data. |
|
235
|
|
|
* @param bool $isFlagged Is flagged as unusual behavior or not. |
|
236
|
|
|
* |
|
237
|
|
|
* @return array |
|
238
|
|
|
*/ |
|
239
|
|
|
protected function filterFrequency(array $logData, array $ipDetail, bool $isFlagged): array |
|
240
|
|
|
{ |
|
241
|
|
|
$isReject = false; |
|
242
|
|
|
|
|
243
|
|
|
if ($this->filterStatus['frequency']) { |
|
244
|
|
|
$timeSecond = []; |
|
245
|
|
|
$timeSecond['s'] = 1; |
|
246
|
|
|
$timeSecond['m'] = 60; |
|
247
|
|
|
$timeSecond['h'] = 3600; |
|
248
|
|
|
$timeSecond['d'] = 86400; |
|
249
|
|
|
|
|
250
|
|
|
foreach (array_keys($this->properties['time_unit_quota']) as $unit) { |
|
251
|
|
|
|
|
252
|
|
|
if (($logData['last_time'] - $ipDetail['first_time_' . $unit]) >= ($timeSecond[$unit] + 1)) { |
|
253
|
|
|
|
|
254
|
|
|
// For example: |
|
255
|
|
|
// (1) minutely: now > first_time_m about 61, (2) hourly: now > first_time_h about 3601, |
|
256
|
|
|
// Let's prepare to rest the the pageview count. |
|
257
|
|
|
$this->filterResetStatus[$unit] = true; |
|
258
|
|
|
|
|
259
|
|
|
} else { |
|
260
|
|
|
|
|
261
|
|
|
// If an user's pageview count is more than the time period limit |
|
262
|
|
|
// He or she will get banned. |
|
263
|
|
|
if ($logData['pageviews_' . $unit] > $this->properties['time_unit_quota'][$unit]) { |
|
264
|
|
|
|
|
265
|
|
|
if ($unit === 's') { |
|
266
|
|
|
$this->action( |
|
267
|
|
|
self::ACTION_TEMPORARILY_DENY, |
|
|
|
|
|
|
268
|
|
|
self::REASON_REACHED_LIMIT_SECOND |
|
|
|
|
|
|
269
|
|
|
); |
|
270
|
|
|
} |
|
271
|
|
|
|
|
272
|
|
|
if ($unit === 'm') { |
|
273
|
|
|
$this->action( |
|
274
|
|
|
self::ACTION_TEMPORARILY_DENY, |
|
275
|
|
|
self::REASON_REACHED_LIMIT_MINUTE |
|
|
|
|
|
|
276
|
|
|
); |
|
277
|
|
|
} |
|
278
|
|
|
|
|
279
|
|
|
if ($unit === 'h') { |
|
280
|
|
|
$this->action( |
|
281
|
|
|
self::ACTION_TEMPORARILY_DENY, |
|
282
|
|
|
self::REASON_REACHED_LIMIT_HOUR |
|
|
|
|
|
|
283
|
|
|
); |
|
284
|
|
|
} |
|
285
|
|
|
|
|
286
|
|
|
if ($unit === 'd') { |
|
287
|
|
|
$this->action( |
|
288
|
|
|
self::ACTION_TEMPORARILY_DENY, |
|
289
|
|
|
self::REASON_REACHED_LIMIT_DAY |
|
|
|
|
|
|
290
|
|
|
); |
|
291
|
|
|
} |
|
292
|
|
|
|
|
293
|
|
|
$isReject = true; |
|
294
|
|
|
} |
|
295
|
|
|
} |
|
296
|
|
|
} |
|
297
|
|
|
|
|
298
|
|
|
foreach ($this->filterResetStatus as $unit => $status) { |
|
299
|
|
|
// Reset the pageview check for specfic time unit. |
|
300
|
|
|
if ($status) { |
|
301
|
|
|
$logData['first_time_' . $unit] = $logData['last_time']; |
|
302
|
|
|
$logData['pageviews_' . $unit] = 0; |
|
303
|
|
|
} |
|
304
|
|
|
} |
|
305
|
|
|
} |
|
306
|
|
|
|
|
307
|
|
|
return [ |
|
308
|
|
|
'is_flagged' => $isFlagged, |
|
309
|
|
|
'is_reject' => $isReject, |
|
310
|
|
|
'log_data' => $logData, |
|
311
|
|
|
]; |
|
312
|
|
|
} |
|
313
|
|
|
} |
|
314
|
|
|
|
terrylinooo /
shieldon
Loading history...