|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace MadWizard\WebAuthn\Crypto; |
|
4
|
|
|
|
|
5
|
|
|
use MadWizard\WebAuthn\Exception\UnsupportedException; |
|
6
|
|
|
use MadWizard\WebAuthn\Exception\WebAuthnException; |
|
7
|
|
|
use MadWizard\WebAuthn\Format\ByteBuffer; |
|
8
|
|
|
use MadWizard\WebAuthn\Format\CborEncoder; |
|
9
|
|
|
use MadWizard\WebAuthn\Format\CborMap; |
|
10
|
|
|
use MadWizard\WebAuthn\Format\DataValidator; |
|
11
|
|
|
|
|
12
|
|
|
class Ec2Key extends CoseKey // TODO exceptions |
|
13
|
|
|
{ |
|
14
|
|
|
/** |
|
15
|
|
|
* @var ByteBuffer |
|
16
|
|
|
*/ |
|
17
|
|
|
private $x; |
|
18
|
|
|
|
|
19
|
|
|
/** |
|
20
|
|
|
* @var ByteBuffer |
|
21
|
|
|
*/ |
|
22
|
|
|
private $y; |
|
23
|
|
|
|
|
24
|
|
|
/** |
|
25
|
|
|
* @var int |
|
26
|
|
|
*/ |
|
27
|
|
|
private $curve; |
|
28
|
|
|
|
|
29
|
|
|
/** |
|
30
|
|
|
* NIST P-256 also known as secp256r1. |
|
31
|
|
|
* |
|
32
|
|
|
* @see https://www.iana.org/assignments/cose/cose.xhtml#elliptic-curves |
|
33
|
|
|
*/ |
|
34
|
|
|
public const CURVE_P256 = 1; |
|
35
|
|
|
|
|
36
|
|
|
/** |
|
37
|
|
|
* NIST P-384 also known as secp384r1. |
|
38
|
|
|
* |
|
39
|
|
|
* @see https://www.iana.org/assignments/cose/cose.xhtml#elliptic-curves |
|
40
|
|
|
*/ |
|
41
|
|
|
public const CURVE_P384 = 2; |
|
42
|
|
|
|
|
43
|
|
|
/** |
|
44
|
|
|
* NIST P-521 also known as secp521r1. |
|
45
|
|
|
* |
|
46
|
|
|
* @see https://www.iana.org/assignments/cose/cose.xhtml#elliptic-curves |
|
47
|
|
|
*/ |
|
48
|
|
|
public const CURVE_P521 = 3; |
|
49
|
|
|
|
|
50
|
|
|
private const SUPPORTED_CURVES = [ |
|
51
|
|
|
self::CURVE_P256, |
|
52
|
|
|
self::CURVE_P384, |
|
53
|
|
|
self::CURVE_P521, |
|
54
|
|
|
]; |
|
55
|
|
|
|
|
56
|
|
|
/** |
|
57
|
|
|
* EC identifier. |
|
58
|
|
|
*/ |
|
59
|
|
|
private const KTP_CRV = -1; |
|
60
|
|
|
|
|
61
|
|
|
/** |
|
62
|
|
|
* X-coordinate. |
|
63
|
|
|
*/ |
|
64
|
|
|
private const KTP_X = -2; |
|
65
|
|
|
|
|
66
|
|
|
/** |
|
67
|
|
|
* Y-coordinate. |
|
68
|
|
|
*/ |
|
69
|
|
|
private const KTP_Y = -3; |
|
70
|
|
|
|
|
71
|
|
|
private const SUPPORTED_ALGORITHMS = [ |
|
72
|
|
|
CoseAlgorithm::ES256, |
|
73
|
|
|
CoseAlgorithm::ES384, |
|
74
|
|
|
CoseAlgorithm::ES512, |
|
75
|
|
|
]; |
|
76
|
|
|
|
|
77
|
|
|
private const CURVE_KEY_LENGTH = [ |
|
78
|
|
|
self::CURVE_P256 => 32, |
|
79
|
|
|
self::CURVE_P384 => 48, |
|
80
|
|
|
self::CURVE_P521 => 66, |
|
81
|
|
|
]; |
|
82
|
|
|
|
|
83
|
|
|
private const CURVE_OID = [ |
|
84
|
|
|
// 1.2.840.10045.3.1.7 NIST P-256 / secp256r1 |
|
85
|
|
|
self::CURVE_P256 => "\x2A\x86\x48\xCE\x3D\x03\x01\x07", |
|
86
|
|
|
|
|
87
|
|
|
// 1.3.132.0.34 NIST P-384 / secp384r1 |
|
88
|
|
|
self::CURVE_P384 => "\x2B\x81\x04\x00\x22", |
|
89
|
|
|
|
|
90
|
|
|
// 1.3.132.0.35 NIST P-521 / secp521r1 |
|
91
|
|
|
self::CURVE_P521 => "\x2B\x81\x04\x00\x23", |
|
92
|
|
|
]; |
|
93
|
|
|
|
|
94
|
37 |
|
public function __construct(ByteBuffer $x, ByteBuffer $y, int $curve, int $algorithm) |
|
95
|
|
|
{ |
|
96
|
37 |
|
parent::__construct($algorithm); |
|
97
|
|
|
|
|
98
|
37 |
|
if (!in_array($curve, self::SUPPORTED_CURVES, true)) { |
|
99
|
|
|
throw new UnsupportedException('Unsupported curve'); |
|
100
|
|
|
} |
|
101
|
|
|
|
|
102
|
37 |
|
$coordLength = self::CURVE_KEY_LENGTH[$curve]; |
|
103
|
|
|
|
|
104
|
37 |
|
if ($x->getLength() !== $coordLength || $y->getLength() !== $coordLength) { |
|
105
|
|
|
throw new WebAuthnException(sprintf('Expecting length %d for x and y', $coordLength)); |
|
106
|
|
|
} |
|
107
|
|
|
|
|
108
|
37 |
|
$this->x = $x; |
|
109
|
37 |
|
$this->y = $y; |
|
110
|
37 |
|
$this->curve = $curve; |
|
111
|
37 |
|
} |
|
112
|
|
|
|
|
113
|
18 |
|
public static function fromCborData(CborMap $data): Ec2Key |
|
114
|
|
|
{ |
|
115
|
|
|
// Note: leading zeroes in X and Y coordinates are preserved in CBOR |
|
116
|
|
|
// See RFC8152 13.1.1. Double Coordinate Curves |
|
117
|
18 |
|
DataValidator::checkMap( |
|
118
|
18 |
|
$data, |
|
119
|
|
|
[ |
|
120
|
18 |
|
self::COSE_KEY_PARAM_KTY => 'integer', |
|
121
|
18 |
|
self::KTP_CRV => 'integer', |
|
122
|
18 |
|
self::COSE_KEY_PARAM_ALG => 'integer', |
|
123
|
18 |
|
self::KTP_X => ByteBuffer::class, |
|
124
|
18 |
|
self::KTP_Y => ByteBuffer::class, |
|
125
|
|
|
] |
|
126
|
|
|
); |
|
127
|
|
|
|
|
128
|
16 |
|
$curve = $data->get(self::KTP_CRV); |
|
129
|
16 |
|
$x = $data->get(self::KTP_X); |
|
130
|
16 |
|
$y = $data->get(self::KTP_Y); |
|
131
|
16 |
|
$algorithm = $data->get(self::COSE_KEY_PARAM_ALG); |
|
132
|
|
|
|
|
133
|
16 |
|
return new Ec2Key($x, $y, $curve, $algorithm); |
|
134
|
|
|
} |
|
135
|
|
|
|
|
136
|
8 |
|
public function getX(): ByteBuffer |
|
137
|
|
|
{ |
|
138
|
8 |
|
return $this->x; |
|
139
|
|
|
} |
|
140
|
|
|
|
|
141
|
8 |
|
public function getY(): ByteBuffer |
|
142
|
|
|
{ |
|
143
|
8 |
|
return $this->y; |
|
144
|
|
|
} |
|
145
|
|
|
|
|
146
|
3 |
|
public function getCurve(): int |
|
147
|
|
|
{ |
|
148
|
3 |
|
return $this->curve; |
|
149
|
|
|
} |
|
150
|
|
|
|
|
151
|
11 |
|
public function asDer(): string |
|
152
|
|
|
{ |
|
153
|
|
|
// DER encoded P256 curve |
|
154
|
|
|
return |
|
155
|
11 |
|
Der::sequence( |
|
156
|
11 |
|
Der::sequence( |
|
157
|
11 |
|
Der::oid("\x2A\x86\x48\xCE\x3D\x02\x01") . // OID 1.2.840.10045.2.1 ecPublicKey |
|
158
|
11 |
|
Der::oid($this->getCurveOid()) |
|
159
|
|
|
) . |
|
160
|
11 |
|
Der::bitString( |
|
161
|
11 |
|
$this->getUncompressedCoordinates()->getBinaryString() |
|
162
|
|
|
) |
|
163
|
|
|
); |
|
164
|
|
|
} |
|
165
|
|
|
|
|
166
|
11 |
|
private function getCurveOid(): string |
|
167
|
|
|
{ |
|
168
|
11 |
|
return self::CURVE_OID[$this->curve]; |
|
169
|
|
|
} |
|
170
|
|
|
|
|
171
|
1 |
|
public function getCbor(): ByteBuffer |
|
172
|
|
|
{ |
|
173
|
|
|
$map = [ |
|
174
|
1 |
|
self::COSE_KEY_PARAM_KTY => self::COSE_KTY_EC2, |
|
175
|
1 |
|
self::COSE_KEY_PARAM_ALG => $this->getAlgorithm(), |
|
176
|
1 |
|
self::KTP_CRV => $this->curve, |
|
177
|
1 |
|
self::KTP_X => $this->x, |
|
178
|
1 |
|
self::KTP_Y => $this->y, |
|
179
|
|
|
]; |
|
180
|
|
|
|
|
181
|
1 |
|
return new ByteBuffer(CborEncoder::encodeMap(CborMap::fromArray($map))); |
|
182
|
|
|
} |
|
183
|
|
|
|
|
184
|
11 |
|
public function getUncompressedCoordinates(): ByteBuffer |
|
185
|
|
|
{ |
|
186
|
|
|
$data = "\x04" . // ECC uncompressed key format |
|
187
|
11 |
|
$this->x->getBinaryString() . |
|
188
|
11 |
|
$this->y->getBinaryString(); |
|
189
|
11 |
|
return new ByteBuffer($data); |
|
190
|
|
|
} |
|
191
|
|
|
|
|
192
|
8 |
|
public function verifySignature(ByteBuffer $data, ByteBuffer $signature): bool |
|
193
|
|
|
{ |
|
194
|
8 |
|
$verifier = new OpenSslVerifier($this->getAlgorithm()); |
|
195
|
8 |
|
return $verifier->verify($data->getBinaryString(), $signature->getBinaryString(), $this->asPem()); |
|
196
|
|
|
} |
|
197
|
|
|
|
|
198
|
37 |
|
protected function algorithmSupported(int $algorithm): bool |
|
199
|
|
|
{ |
|
200
|
37 |
|
return in_array($algorithm, self::SUPPORTED_ALGORITHMS, true); |
|
201
|
|
|
} |
|
202
|
|
|
} |
|
203
|
|
|
|
madwizard-org /
webauthn-server
