|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
/* |
|
6
|
|
|
* The MIT License (MIT) |
|
7
|
|
|
* |
|
8
|
|
|
* Copyright (c) 2014-2018 Spomky-Labs |
|
9
|
|
|
* |
|
10
|
|
|
* This software may be modified and distributed under the terms |
|
11
|
|
|
* of the MIT license. See the LICENSE file for details. |
|
12
|
|
|
*/ |
|
13
|
|
|
|
|
14
|
|
|
namespace U2FAuthentication\Fido; |
|
15
|
|
|
|
|
16
|
|
|
use Base64Url\Base64Url; |
|
17
|
|
|
|
|
18
|
|
|
class SignatureResponse |
|
19
|
|
|
{ |
|
20
|
|
|
/** |
|
21
|
|
|
* @var ClientData |
|
22
|
|
|
*/ |
|
23
|
|
|
private $clientData; |
|
24
|
|
|
|
|
25
|
|
|
/** |
|
26
|
|
|
* @var KeyHandler |
|
27
|
|
|
*/ |
|
28
|
|
|
private $keyHandle; |
|
29
|
|
|
|
|
30
|
|
|
/** |
|
31
|
|
|
* @var bool |
|
32
|
|
|
*/ |
|
33
|
|
|
private $userPresence; |
|
34
|
|
|
|
|
35
|
|
|
/** |
|
36
|
|
|
* @var string |
|
37
|
|
|
*/ |
|
38
|
|
|
private $userPresenceByte; |
|
39
|
|
|
|
|
40
|
|
|
/** |
|
41
|
|
|
* @var int |
|
42
|
|
|
*/ |
|
43
|
|
|
private $counter; |
|
44
|
|
|
|
|
45
|
|
|
/** |
|
46
|
|
|
* @var string |
|
47
|
|
|
*/ |
|
48
|
|
|
private $counterBytes; |
|
49
|
|
|
|
|
50
|
|
|
/** |
|
51
|
|
|
* @var string |
|
52
|
|
|
*/ |
|
53
|
|
|
private $signature; |
|
54
|
|
|
|
|
55
|
|
|
public function __construct(array $data) |
|
56
|
|
|
{ |
|
57
|
|
|
if (array_key_exists('errorCode', $data) && 0 !== $data['errorCode']) { |
|
58
|
|
|
throw new \InvalidArgumentException('Invalid response.'); |
|
59
|
|
|
} |
|
60
|
|
|
|
|
61
|
|
|
$this->keyHandle = $this->retrieveKeyHandle($data); |
|
62
|
|
|
$this->clientData = $this->retrieveClientData($data); |
|
63
|
|
|
if ('navigator.id.getAssertion' !== $this->clientData->getType()) { |
|
64
|
|
|
throw new \InvalidArgumentException('Invalid response.'); |
|
65
|
|
|
} |
|
66
|
|
|
list($this->userPresence, $this->userPresenceByte, $this->counter, $this->counterBytes, $this->signature) = $this->extractSignatureData($data); |
|
67
|
|
|
} |
|
68
|
|
|
|
|
69
|
|
|
public function getClientData(): ClientData |
|
70
|
|
|
{ |
|
71
|
|
|
return $this->clientData; |
|
72
|
|
|
} |
|
73
|
|
|
|
|
74
|
|
|
public function getKeyHandle(): KeyHandler |
|
75
|
|
|
{ |
|
76
|
|
|
return $this->keyHandle; |
|
77
|
|
|
} |
|
78
|
|
|
|
|
79
|
|
|
public function isUserPresent(): bool |
|
80
|
|
|
{ |
|
81
|
|
|
return $this->userPresence; |
|
82
|
|
|
} |
|
83
|
|
|
|
|
84
|
|
|
public function getCounter(): int |
|
85
|
|
|
{ |
|
86
|
|
|
return $this->counter; |
|
87
|
|
|
} |
|
88
|
|
|
|
|
89
|
|
|
public function getSignature(): string |
|
90
|
|
|
{ |
|
91
|
|
|
return $this->signature; |
|
92
|
|
|
} |
|
93
|
|
|
|
|
94
|
|
|
private function retrieveKeyHandle(array $data): KeyHandler |
|
95
|
|
|
{ |
|
96
|
|
|
if (!array_key_exists('keyHandle', $data) || !\is_string($data['keyHandle'])) { |
|
97
|
|
|
throw new \InvalidArgumentException('Invalid response.'); |
|
98
|
|
|
} |
|
99
|
|
|
|
|
100
|
|
|
return new KeyHandler(Base64Url::decode($data['keyHandle'])); |
|
101
|
|
|
} |
|
102
|
|
|
|
|
103
|
|
|
private function retrieveClientData(array $data): ClientData |
|
104
|
|
|
{ |
|
105
|
|
|
if (!array_key_exists('clientData', $data) || !\is_string($data['clientData'])) { |
|
106
|
|
|
throw new \InvalidArgumentException('Invalid response.'); |
|
107
|
|
|
} |
|
108
|
|
|
|
|
109
|
|
|
return new ClientData($data['clientData']); |
|
110
|
|
|
} |
|
111
|
|
|
|
|
112
|
|
|
private function extractSignatureData(array $data): array |
|
113
|
|
|
{ |
|
114
|
|
|
if (!array_key_exists('signatureData', $data) || !\is_string($data['signatureData'])) { |
|
115
|
|
|
throw new \InvalidArgumentException('Invalid response.'); |
|
116
|
|
|
} |
|
117
|
|
|
|
|
118
|
|
|
$stream = \Safe\fopen('php://memory', 'r+'); |
|
119
|
|
|
$signatureData = Base64Url::decode($data['signatureData']); |
|
120
|
|
|
\Safe\fwrite($stream, $signatureData); |
|
121
|
|
|
\Safe\rewind($stream); |
|
122
|
|
|
|
|
123
|
|
|
$userPresenceByte = \Safe\fread($stream, 1); |
|
124
|
|
|
if (1 !== mb_strlen($userPresenceByte, '8bit')) { |
|
125
|
|
|
\Safe\fclose($stream); |
|
126
|
|
|
|
|
127
|
|
|
throw new \InvalidArgumentException('Invalid response.'); |
|
128
|
|
|
} |
|
129
|
|
|
$userPresence = (bool) \ord($userPresenceByte); |
|
130
|
|
|
|
|
131
|
|
|
$counterBytes = \Safe\fread($stream, 4); |
|
132
|
|
|
if (4 !== mb_strlen($counterBytes, '8bit')) { |
|
133
|
|
|
\Safe\fclose($stream); |
|
134
|
|
|
|
|
135
|
|
|
throw new \InvalidArgumentException('Invalid response.'); |
|
136
|
|
|
} |
|
137
|
|
|
$counter = unpack('Nctr', $counterBytes)['ctr']; |
|
138
|
|
|
$signature = ''; |
|
139
|
|
|
while (!feof($stream)) { |
|
140
|
|
|
$signature .= \Safe\fread($stream, 1024); |
|
141
|
|
|
} |
|
142
|
|
|
\Safe\fclose($stream); |
|
143
|
|
|
|
|
144
|
|
|
return [ |
|
145
|
|
|
$userPresence, |
|
146
|
|
|
$userPresenceByte, |
|
147
|
|
|
$counter, |
|
148
|
|
|
$counterBytes, |
|
149
|
|
|
$signature, |
|
150
|
|
|
]; |
|
151
|
|
|
} |
|
152
|
|
|
|
|
153
|
|
|
public function isValid(SignatureRequest $request, ?int $currentCounter = null): bool |
|
154
|
|
|
{ |
|
155
|
|
|
if (!hash_equals($request->getChallenge(), $this->clientData->getChallenge())) { |
|
156
|
|
|
return false; |
|
157
|
|
|
} |
|
158
|
|
|
if (!hash_equals($request->getApplicationId(), $this->clientData->getOrigin())) { |
|
159
|
|
|
return false; |
|
160
|
|
|
} |
|
161
|
|
|
|
|
162
|
|
|
if (null !== $currentCounter && $currentCounter >= $this->counter) { |
|
163
|
|
|
return false; |
|
164
|
|
|
} |
|
165
|
|
|
|
|
166
|
|
|
$dataToVerify = hash('sha256', $this->clientData->getOrigin(), true); |
|
167
|
|
|
$dataToVerify .= $this->userPresenceByte; |
|
168
|
|
|
$dataToVerify .= $this->counterBytes; |
|
169
|
|
|
$dataToVerify .= hash('sha256', $this->clientData->getRawData(), true); |
|
170
|
|
|
|
|
171
|
|
|
$registeredKey = $request->getRegisteredKey($this->keyHandle); |
|
172
|
|
|
|
|
173
|
|
|
return 1 === openssl_verify($dataToVerify, $this->signature, $registeredKey->getPublicKeyAsPem(), OPENSSL_ALGO_SHA256); |
|
174
|
|
|
} |
|
175
|
|
|
} |
|
176
|
|
|
|
Spomky-Labs /
u2f-php
