|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/* |
|
4
|
|
|
* The MIT License (MIT) |
|
5
|
|
|
* |
|
6
|
|
|
* Copyright (c) 2014-2016 Spomky-Labs |
|
7
|
|
|
* |
|
8
|
|
|
* This software may be modified and distributed under the terms |
|
9
|
|
|
* of the MIT license. See the LICENSE file for details. |
|
10
|
|
|
*/ |
|
11
|
|
|
|
|
12
|
|
|
namespace Jose; |
|
13
|
|
|
|
|
14
|
|
|
use Assert\Assertion; |
|
15
|
|
|
use Base64Url\Base64Url; |
|
16
|
|
|
use Jose\Algorithm\SignatureAlgorithmInterface; |
|
17
|
|
|
use Jose\Behaviour\CommonSigningMethods; |
|
18
|
|
|
use Jose\Behaviour\HasJWAManager; |
|
19
|
|
|
use Jose\Behaviour\HasKeyChecker; |
|
20
|
|
|
use Jose\Behaviour\HasLogger; |
|
21
|
|
|
use Jose\Factory\AlgorithmManagerFactory; |
|
22
|
|
|
use Jose\Object\JWKInterface; |
|
23
|
|
|
use Jose\Object\JWSInterface; |
|
24
|
|
|
use Jose\Object\Signature; |
|
25
|
|
|
use Jose\Object\SignatureInterface; |
|
26
|
|
|
use Psr\Log\LoggerInterface; |
|
27
|
|
|
use Psr\Log\LogLevel; |
|
28
|
|
|
|
|
29
|
|
|
final class Signer implements SignerInterface |
|
30
|
|
|
{ |
|
31
|
|
|
use HasKeyChecker; |
|
32
|
|
|
use HasJWAManager; |
|
33
|
|
|
use HasLogger; |
|
34
|
|
|
use CommonSigningMethods; |
|
35
|
|
|
|
|
36
|
|
|
/** |
|
37
|
|
|
* Signer constructor. |
|
38
|
|
|
* |
|
39
|
|
|
* @param string[]|\Jose\Algorithm\SignatureAlgorithmInterface[] $signature_algorithms |
|
40
|
|
|
*/ |
|
41
|
|
|
public function __construct(array $signature_algorithms) |
|
42
|
|
|
{ |
|
43
|
|
|
$this->setSignatureAlgorithms($signature_algorithms); |
|
44
|
|
|
|
|
45
|
|
|
$this->setJWAManager(AlgorithmManagerFactory::createAlgorithmManager($signature_algorithms)); |
|
46
|
|
|
} |
|
47
|
|
|
|
|
48
|
|
|
/** |
|
49
|
|
|
* {@inheritdoc} |
|
50
|
|
|
*/ |
|
51
|
|
|
public static function createSigner(array $signature_algorithms, LoggerInterface $logger = null) |
|
52
|
|
|
{ |
|
53
|
|
|
$signer = new self($signature_algorithms); |
|
54
|
|
|
if (null !== $logger) { |
|
55
|
|
|
$signer->enableLogging($logger); |
|
56
|
|
|
} |
|
57
|
|
|
|
|
58
|
|
|
return $signer; |
|
59
|
|
|
} |
|
60
|
|
|
|
|
61
|
|
|
/** |
|
62
|
|
|
* {@inheritdoc} |
|
63
|
|
|
*/ |
|
64
|
|
|
public function sign(JWSInterface &$jws) |
|
65
|
|
|
{ |
|
66
|
|
|
$this->log(LogLevel::INFO, 'Trying to sign the JWS object', ['jws' => $jws]); |
|
67
|
|
|
$nb_signatures = $jws->countSignatures(); |
|
68
|
|
|
|
|
69
|
|
|
for ($i = 0; $i < $nb_signatures; $i++) { |
|
70
|
|
|
$this->computeSignature($jws, $jws->getSignature($i)); |
|
71
|
|
|
} |
|
72
|
|
|
$this->log(LogLevel::INFO, 'JWS object signed!'); |
|
73
|
|
|
} |
|
74
|
|
|
|
|
75
|
|
|
/** |
|
76
|
|
|
* @param \Jose\Object\JWSInterface $jws |
|
77
|
|
|
* @param \Jose\Object\SignatureInterface $signature |
|
78
|
|
|
*/ |
|
79
|
|
|
private function computeSignature(JWSInterface $jws, SignatureInterface &$signature) |
|
80
|
|
|
{ |
|
81
|
|
|
$this->log(LogLevel::DEBUG, 'Creation of the signature'); |
|
82
|
|
|
if (null === $signature->getSignatureKey()) { |
|
83
|
|
|
$this->log(LogLevel::DEBUG, 'The signature key is not set. Aborting.'); |
|
84
|
|
|
|
|
85
|
|
|
return; |
|
86
|
|
|
} |
|
87
|
|
|
$this->checkKeyUsage($signature->getSignatureKey(), 'signature'); |
|
88
|
|
|
|
|
89
|
|
|
$signature_algorithm = $this->getSignatureAlgorithm($signature->getAllHeaders(), $signature->getSignatureKey()); |
|
90
|
|
|
|
|
91
|
|
|
$this->log(LogLevel::DEBUG, 'Trying to compute the signature'); |
|
92
|
|
|
$input = $this->getInputToSign($jws, $signature); |
|
93
|
|
|
|
|
94
|
|
|
$value = $signature_algorithm->sign( |
|
95
|
|
|
$signature->getSignatureKey(), |
|
96
|
|
|
$input |
|
97
|
|
|
); |
|
98
|
|
|
|
|
99
|
|
|
$this->log(LogLevel::DEBUG, 'Signature computation done'); |
|
100
|
|
|
|
|
101
|
|
|
$signature = Signature::createSignatureFromLoadedData( |
|
102
|
|
|
$value, |
|
103
|
|
|
$signature->getEncodedProtectedHeaders(), |
|
104
|
|
|
$signature->getHeaders() |
|
105
|
|
|
); |
|
106
|
|
|
|
|
107
|
|
|
$this->log(LogLevel::DEBUG, 'The signature is done', ['signature' => $signature]); |
|
108
|
|
|
} |
|
109
|
|
|
|
|
110
|
|
|
/** |
|
111
|
|
|
* @param \Jose\Object\JWSInterface $jws |
|
112
|
|
|
* @param \Jose\Object\SignatureInterface $signature |
|
113
|
|
|
* |
|
114
|
|
|
* @return string |
|
115
|
|
|
*/ |
|
116
|
|
|
private function getInputToSign(JWSInterface $jws, SignatureInterface $signature) |
|
117
|
|
|
{ |
|
118
|
|
|
$this->checkB64HeaderAndCrit($signature); |
|
119
|
|
|
$encoded_protected_headers = $signature->getEncodedProtectedHeaders(); |
|
120
|
|
|
$payload = $jws->getPayload(); |
|
121
|
|
|
if (!$signature->hasProtectedHeader('b64') || true === $signature->getProtectedHeader('b64')) { |
|
122
|
|
|
$encoded_payload = Base64Url::encode(is_string($payload) ? $payload : json_encode($payload)); |
|
123
|
|
|
|
|
124
|
|
|
return sprintf('%s.%s', $encoded_protected_headers, $encoded_payload); |
|
125
|
|
|
} |
|
126
|
|
|
|
|
127
|
|
|
return sprintf('%s.%s', $encoded_protected_headers, $payload); |
|
128
|
|
|
} |
|
129
|
|
|
|
|
130
|
|
|
/** |
|
131
|
|
|
* @param \Jose\Object\SignatureInterface $signature |
|
132
|
|
|
* |
|
133
|
|
|
* @throws \InvalidArgumentException |
|
134
|
|
|
*/ |
|
135
|
|
|
private function checkB64HeaderAndCrit(SignatureInterface $signature) |
|
136
|
|
|
{ |
|
137
|
|
|
if (!$signature->hasProtectedHeader('b64')) { |
|
138
|
|
|
return; |
|
139
|
|
|
} |
|
140
|
|
|
|
|
141
|
|
|
Assertion::true($signature->hasProtectedHeader('crit'), 'The protected header parameter "crit" is mandatory when protected header parameter "b64" is set.'); |
|
142
|
|
|
Assertion::isArray($signature->getProtectedHeader('crit'), 'The protected header parameter "crit" must be an array.'); |
|
143
|
|
|
Assertion::inArray('b64', $signature->getProtectedHeader('crit'), 'The protected header parameter "crit" must contain "b64" when protected header parameter "b64" is set.'); |
|
144
|
|
|
} |
|
145
|
|
|
|
|
146
|
|
|
/** |
|
147
|
|
|
* @param array $complete_header The complete header |
|
148
|
|
|
* @param \Jose\Object\JWKInterface $key |
|
149
|
|
|
* |
|
150
|
|
|
* @return \Jose\Algorithm\SignatureAlgorithmInterface |
|
151
|
|
|
*/ |
|
152
|
|
|
private function getSignatureAlgorithm(array $complete_header, JWKInterface $key) |
|
153
|
|
|
{ |
|
154
|
|
|
$this->log(LogLevel::DEBUG, 'Trying to find the algorithm used to sign'); |
|
155
|
|
|
Assertion::keyExists($complete_header, 'alg', 'No "alg" parameter set in the header.'); |
|
156
|
|
|
|
|
157
|
|
|
$this->log(LogLevel::DEBUG, 'The algorithm is {alg}', ['alg' => $complete_header['alg']]); |
|
158
|
|
|
|
|
159
|
|
|
Assertion::false( |
|
160
|
|
|
$key->has('alg') && $key->get('alg') !== $complete_header['alg'], |
|
161
|
|
|
sprintf('The algorithm "%s" is not allowed with this key.', $complete_header['alg']) |
|
162
|
|
|
); |
|
163
|
|
|
|
|
164
|
|
|
$signature_algorithm = $this->getJWAManager()->getAlgorithm($complete_header['alg']); |
|
165
|
|
|
Assertion::isInstanceOf($signature_algorithm, SignatureAlgorithmInterface::class, sprintf('The algorithm "%s" is not supported.', $complete_header['alg'])); |
|
166
|
|
|
|
|
167
|
|
|
$this->log(LogLevel::DEBUG, 'The algorithm {alg} is supported', ['alg' => $complete_header['alg'], 'handler' => $signature_algorithm]); |
|
168
|
|
|
|
|
169
|
|
|
return $signature_algorithm; |
|
170
|
|
|
} |
|
171
|
|
|
} |
|
172
|
|
|
|
Spomky-Labs /
jose
