1
|
|
|
<?php |
2
|
|
|
|
3
|
|
|
namespace AlexLisenkov\LaravelWebPush; |
4
|
|
|
|
5
|
|
|
use AlexLisenkov\LaravelWebPush\Contracts\JWTGeneratorContract; |
6
|
|
|
use Base64Url\Base64Url; |
7
|
|
|
use Illuminate\Contracts\Config\Repository as ConfigRepository; |
8
|
|
|
use Jose\Component\Core\AlgorithmManager; |
9
|
|
|
use Jose\Component\Core\Converter\StandardConverter; |
10
|
|
|
use Jose\Component\Core\JWK; |
11
|
|
|
use Jose\Component\Signature\Algorithm\ES256; |
12
|
|
|
use Jose\Component\Signature\JWS; |
13
|
|
|
use Jose\Component\Signature\JWSBuilder; |
14
|
|
|
use Jose\Component\Signature\Serializer\CompactSerializer; |
15
|
|
|
|
16
|
|
|
class JWTGenerator implements JWTGeneratorContract |
17
|
|
|
{ |
18
|
|
|
/** |
19
|
|
|
* @var int |
20
|
|
|
*/ |
21
|
|
|
private $expires_at; |
22
|
|
|
/** |
23
|
|
|
* @var string |
24
|
|
|
*/ |
25
|
|
|
private $audience; |
26
|
|
|
/** |
27
|
|
|
* @var ConfigRepository |
28
|
|
|
*/ |
29
|
|
|
private $config_repository; |
30
|
|
|
|
31
|
16 |
|
public function __construct(ConfigRepository $config_repository) |
32
|
|
|
{ |
33
|
16 |
|
$this->config_repository = $config_repository; |
34
|
16 |
|
} |
35
|
|
|
|
36
|
|
|
/** |
37
|
|
|
* @param string $aud |
38
|
|
|
* |
39
|
|
|
* @return JWTGeneratorContract |
40
|
|
|
*/ |
41
|
7 |
|
public function withAudience(string $aud): JWTGeneratorContract |
42
|
|
|
{ |
43
|
7 |
|
$this->audience = $aud; |
44
|
|
|
|
45
|
7 |
|
return $this; |
46
|
|
|
} |
47
|
|
|
|
48
|
|
|
/** |
49
|
|
|
* @param int $time |
50
|
|
|
* |
51
|
|
|
* @return JWTGeneratorContract |
52
|
|
|
*/ |
53
|
1 |
|
public function willExpireAt(int $time): JWTGeneratorContract |
54
|
|
|
{ |
55
|
1 |
|
$this->expires_at = $time; |
56
|
|
|
|
57
|
1 |
|
return $this; |
58
|
|
|
} |
59
|
|
|
|
60
|
|
|
/** |
61
|
|
|
* @return string |
62
|
|
|
* @throws \Exception |
63
|
|
|
*/ |
64
|
1 |
|
public function serialize(): string |
65
|
|
|
{ |
66
|
1 |
|
$jsonConverter = new StandardConverter(); |
67
|
1 |
|
$jwsCompactSerializer = new CompactSerializer($jsonConverter); |
68
|
|
|
|
69
|
1 |
|
return $jwsCompactSerializer->serialize($this->getJWS(), 0); |
70
|
|
|
} |
71
|
|
|
|
72
|
|
|
/** |
73
|
|
|
* @return JWS |
74
|
|
|
* @throws \Exception |
75
|
|
|
*/ |
76
|
3 |
|
public function getJWS(): JWS |
77
|
|
|
{ |
78
|
3 |
|
$jsonConverter = new StandardConverter(); |
79
|
3 |
|
$jwsBuilder = new JWSBuilder($jsonConverter, AlgorithmManager::create([new ES256()])); |
80
|
|
|
|
81
|
|
|
return $jwsBuilder |
82
|
3 |
|
->create() |
83
|
3 |
|
->withPayload($this->getPayload()) |
84
|
3 |
|
->addSignature($this->getJWK(), $this->getHeader()) |
85
|
3 |
|
->build(); |
86
|
|
|
} |
87
|
|
|
|
88
|
|
|
/** |
89
|
|
|
* @return string |
90
|
|
|
* @throws \Exception |
91
|
|
|
*/ |
92
|
8 |
|
public function getPayload(): string |
93
|
|
|
{ |
94
|
8 |
|
if (!$this->audience) { |
95
|
1 |
|
throw new \Exception('No audience set'); |
96
|
|
|
} |
97
|
|
|
|
98
|
7 |
|
if (!$this->getExpiresAt()) { |
99
|
1 |
|
$this->willExpireIn($this->getConfigVariable('expiration', Constants::DEFAULT_EXPIRE)); |
100
|
|
|
} |
101
|
|
|
|
102
|
7 |
|
return json_encode([ |
103
|
7 |
|
'aud' => $this->audience, |
104
|
7 |
|
'exp' => $this->getExpiresAt(), |
105
|
7 |
|
'sub' => $this->getConfigVariable('subject', env('APP_URL', 'mailto:[email protected]')), |
106
|
7 |
|
], JSON_UNESCAPED_SLASHES | JSON_NUMERIC_CHECK); |
107
|
|
|
} |
108
|
|
|
|
109
|
|
|
/** |
110
|
|
|
* @param int $time |
111
|
|
|
* |
112
|
|
|
* @return JWTGeneratorContract |
113
|
|
|
*/ |
114
|
7 |
|
public function willExpireIn(int $time): JWTGeneratorContract |
115
|
|
|
{ |
116
|
7 |
|
$this->expires_at = time() + $time; |
117
|
|
|
|
118
|
7 |
|
return $this; |
119
|
|
|
} |
120
|
|
|
|
121
|
|
|
/** |
122
|
|
|
* @param string $key |
123
|
|
|
* |
124
|
|
|
* @param $default |
125
|
|
|
* |
126
|
|
|
* @return mixed |
127
|
|
|
*/ |
128
|
13 |
|
private function getConfigVariable(string $key, $default = null) |
129
|
|
|
{ |
130
|
13 |
|
return $this->config_repository->get(Constants::CONFIG_KEY . '.' . $key, $default); |
131
|
|
|
} |
132
|
|
|
|
133
|
|
|
/** |
134
|
|
|
* @return JWK |
135
|
|
|
*/ |
136
|
9 |
|
public function getJWK(): JWK |
137
|
|
|
{ |
138
|
9 |
|
$local_server_key = Base64Url::decode($this->getConfigVariable('public_key')); |
139
|
9 |
|
$public = $this->unserializePublicKey($local_server_key); |
140
|
|
|
|
141
|
8 |
|
return JWK::create([ |
142
|
8 |
|
'kty' => 'EC', |
143
|
8 |
|
'crv' => 'P-256', |
144
|
8 |
|
'x' => Base64Url::encode(hex2bin($public['x'])), |
145
|
8 |
|
'y' => Base64Url::encode(hex2bin($public['y'])), |
146
|
8 |
|
'd' => $this->getConfigVariable('private_key'), |
147
|
|
|
]); |
148
|
|
|
} |
149
|
|
|
|
150
|
|
|
/** |
151
|
|
|
* @param string $data |
152
|
|
|
* |
153
|
|
|
* @return array |
154
|
|
|
*/ |
155
|
9 |
|
private function unserializePublicKey(string $data): array |
156
|
|
|
{ |
157
|
9 |
|
$data = bin2hex($data); |
158
|
9 |
|
if (mb_substr($data, 0, 2, '8bit') !== '04') { |
159
|
1 |
|
throw new \InvalidArgumentException('Invalid data: only uncompressed keys are supported.'); |
160
|
|
|
} |
161
|
8 |
|
$data = mb_substr($data, 2, null, '8bit'); |
162
|
8 |
|
$dataLength = mb_strlen($data, '8bit'); |
163
|
|
|
|
164
|
|
|
return [ |
165
|
8 |
|
'x' => mb_substr($data, 0, $dataLength / 2, '8bit'), |
166
|
8 |
|
'y' => mb_substr($data, $dataLength / 2, null, '8bit'), |
167
|
|
|
]; |
168
|
|
|
} |
169
|
|
|
|
170
|
|
|
/** |
171
|
|
|
* @return array |
172
|
|
|
*/ |
173
|
4 |
|
public function getHeader(): array |
174
|
|
|
{ |
175
|
|
|
return [ |
176
|
4 |
|
'typ' => 'JWT', |
177
|
|
|
'alg' => 'ES256', |
178
|
|
|
]; |
179
|
|
|
} |
180
|
|
|
|
181
|
|
|
/** |
182
|
|
|
* Get ExpiresAt |
183
|
|
|
* |
184
|
|
|
* @return int|null |
185
|
|
|
*/ |
186
|
8 |
|
public function getExpiresAt(): ?int |
187
|
|
|
{ |
188
|
8 |
|
return $this->expires_at; |
189
|
|
|
} |
190
|
|
|
} |
191
|
|
|
|