|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/* |
|
4
|
|
|
* This file is part of the mingyoung/dingtalk. |
|
5
|
|
|
* |
|
6
|
|
|
* (c) 张铭阳 <[email protected]> |
|
7
|
|
|
* |
|
8
|
|
|
* This source file is subject to the MIT license that is bundled |
|
9
|
|
|
* with this source code in the file LICENSE. |
|
10
|
|
|
*/ |
|
11
|
|
|
|
|
12
|
|
|
namespace EasyDingTalk\Kernel\Encryption; |
|
13
|
|
|
|
|
14
|
|
|
use function EasyDingTalk\str_random; |
|
15
|
|
|
|
|
16
|
|
|
class Encryptor |
|
17
|
|
|
{ |
|
18
|
|
|
/** |
|
19
|
|
|
* @var string |
|
20
|
|
|
*/ |
|
21
|
|
|
protected $key; |
|
22
|
|
|
|
|
23
|
|
|
/** |
|
24
|
|
|
* @var string |
|
25
|
|
|
*/ |
|
26
|
|
|
protected $token; |
|
27
|
|
|
|
|
28
|
|
|
/** |
|
29
|
|
|
* @var string |
|
30
|
|
|
*/ |
|
31
|
|
|
protected $aesKey; |
|
32
|
|
|
|
|
33
|
|
|
/** |
|
34
|
|
|
* @var int |
|
35
|
|
|
*/ |
|
36
|
|
|
protected $blockSize = 32; |
|
37
|
|
|
|
|
38
|
|
|
/** |
|
39
|
|
|
* Encryptor Constructor. |
|
40
|
|
|
* |
|
41
|
|
|
* @param string $key |
|
42
|
|
|
* @param string $token |
|
43
|
|
|
* @param string $aesKey |
|
44
|
|
|
*/ |
|
45
|
|
|
public function __construct($key, $token, $aesKey) |
|
46
|
|
|
{ |
|
47
|
|
|
$this->key = $key; |
|
48
|
|
|
$this->token = $token; |
|
49
|
|
|
$this->aesKey = base64_decode($aesKey.'=', true); |
|
50
|
|
|
} |
|
51
|
|
|
|
|
52
|
|
|
/** |
|
53
|
|
|
* Encrypt the data. |
|
54
|
|
|
* |
|
55
|
|
|
* @param string $data |
|
56
|
|
|
* @param string $nonce |
|
57
|
|
|
* @param int $timestamp |
|
58
|
|
|
* |
|
59
|
|
|
* @return string |
|
60
|
|
|
*/ |
|
61
|
|
|
public function encrypt($data, $nonce = null, $timestamp = null) |
|
62
|
|
|
{ |
|
63
|
|
|
$string = str_random().pack('N', strlen($data)).$data.$this->key; |
|
64
|
|
|
|
|
65
|
|
|
$result = base64_encode( |
|
66
|
|
|
openssl_encrypt($this->pkcs7Pad($string), 'AES-256-CBC', $this->aesKey, OPENSSL_NO_PADDING, substr($this->aesKey, 0, 16)) |
|
67
|
|
|
); |
|
68
|
|
|
|
|
69
|
|
|
!is_null($nonce) || $nonce = uniqid(); |
|
70
|
|
|
!is_null($timestamp) || $timestamp = time(); |
|
71
|
|
|
|
|
72
|
|
|
return json_encode([ |
|
73
|
|
|
'msg_signature' => $this->signature($this->token, $nonce, $timestamp, $result), |
|
74
|
|
|
'encrypt' => $result, |
|
75
|
|
|
'timeStamp' => $timestamp, |
|
76
|
|
|
'nonce' => $nonce, |
|
77
|
|
|
]); |
|
78
|
|
|
} |
|
79
|
|
|
|
|
80
|
|
|
/** |
|
81
|
|
|
* Decrypt the data. |
|
82
|
|
|
* |
|
83
|
|
|
* @param string $data |
|
84
|
|
|
* @param string $signature |
|
85
|
|
|
* @param string $nonce |
|
86
|
|
|
* @param int $timestamp |
|
87
|
|
|
* |
|
88
|
|
|
* @return string |
|
89
|
|
|
*/ |
|
90
|
|
|
public function decrypt($data, $signature, $nonce, $timestamp) |
|
91
|
|
|
{ |
|
92
|
|
|
if ($signature !== $this->signature($this->token, $nonce, $timestamp, $data)) { |
|
93
|
|
|
throw new \RuntimeException('Invalid Signature.'); |
|
94
|
|
|
} |
|
95
|
|
|
|
|
96
|
|
|
$decrypted = openssl_decrypt( |
|
97
|
|
|
base64_decode($data, true), 'AES-256-CBC', $this->aesKey, OPENSSL_NO_PADDING, substr($this->aesKey, 0, 16), |
|
98
|
|
|
); |
|
99
|
|
|
|
|
100
|
|
|
$result = $this->pkcs7Unpad($decrypted); |
|
101
|
|
|
|
|
102
|
|
|
$data = substr($result, 16, strlen($result)); |
|
103
|
|
|
|
|
104
|
|
|
$contentLen = unpack('N', substr($data, 0, 4))[1]; |
|
105
|
|
|
|
|
106
|
|
|
if (substr($data, $contentLen + 4) !== $this->key) { |
|
107
|
|
|
throw new \RuntimeException('Invalid CorpId.'); |
|
108
|
|
|
} |
|
109
|
|
|
|
|
110
|
|
|
return substr($data, 4, $contentLen); |
|
111
|
|
|
} |
|
112
|
|
|
|
|
113
|
|
|
/** |
|
114
|
|
|
* Get SHA1. |
|
115
|
|
|
* |
|
116
|
|
|
* @return string |
|
117
|
|
|
*/ |
|
118
|
|
|
public function signature() |
|
119
|
|
|
{ |
|
120
|
|
|
$array = func_get_args(); |
|
121
|
|
|
sort($array, SORT_STRING); |
|
122
|
|
|
|
|
123
|
|
|
return sha1(implode($array)); |
|
124
|
|
|
} |
|
125
|
|
|
|
|
126
|
|
|
/** |
|
127
|
|
|
* PKCS#7 pad. |
|
128
|
|
|
* |
|
129
|
|
|
* @param string $text |
|
130
|
|
|
* |
|
131
|
|
|
* @return string |
|
132
|
|
|
*/ |
|
133
|
|
|
public function pkcs7Pad(string $text) |
|
134
|
|
|
{ |
|
135
|
|
|
$padding = $this->blockSize - (strlen($text) % $this->blockSize); |
|
136
|
|
|
$pattern = chr($padding); |
|
137
|
|
|
|
|
138
|
|
|
return $text.str_repeat($pattern, $padding); |
|
139
|
|
|
} |
|
140
|
|
|
|
|
141
|
|
|
/** |
|
142
|
|
|
* PKCS#7 unpad. |
|
143
|
|
|
* |
|
144
|
|
|
* @param string $text |
|
145
|
|
|
* |
|
146
|
|
|
* @return string |
|
147
|
|
|
*/ |
|
148
|
|
|
public function pkcs7Unpad(string $text) |
|
149
|
|
|
{ |
|
150
|
|
|
$pad = ord(substr($text, -1)); |
|
151
|
|
|
if ($pad < 1 || $pad > $this->blockSize) { |
|
152
|
|
|
$pad = 0; |
|
153
|
|
|
} |
|
154
|
|
|
|
|
155
|
|
|
return substr($text, 0, (strlen($text) - $pad)); |
|
156
|
|
|
} |
|
157
|
|
|
} |
|
158
|
|
|
|
mingyoung /
dingtalk
