|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\Serializer\Signature; |
|
4
|
|
|
|
|
5
|
|
|
use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface; |
|
6
|
|
|
use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\Adapter\EcAdapter; |
|
7
|
|
|
use BitWasp\Bitcoin\Crypto\EcAdapter\Serializer\Signature\DerSignatureSerializerInterface; |
|
8
|
|
|
use BitWasp\Buffertools\BufferInterface; |
|
9
|
|
|
use BitWasp\Buffertools\Exceptions\ParserOutOfRange; |
|
10
|
|
|
use BitWasp\Buffertools\Parser; |
|
11
|
|
|
use BitWasp\Buffertools\Buffer; |
|
12
|
|
|
use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\Signature\Signature; |
|
13
|
|
|
use BitWasp\Bitcoin\Crypto\EcAdapter\Signature\SignatureInterface; |
|
14
|
|
|
use BitWasp\Buffertools\Template; |
|
15
|
|
|
use BitWasp\Buffertools\TemplateFactory; |
|
16
|
|
|
|
|
17
|
|
|
class DerSignatureSerializer implements DerSignatureSerializerInterface |
|
18
|
|
|
{ |
|
19
|
|
|
/** |
|
20
|
|
|
* @var EcAdapter |
|
21
|
|
|
*/ |
|
22
|
|
|
private $ecAdapter; |
|
23
|
|
|
|
|
24
|
|
|
/** |
|
25
|
|
|
* @param EcAdapter $adapter |
|
26
|
|
|
*/ |
|
27
|
39 |
|
public function __construct(EcAdapter $adapter) |
|
28
|
|
|
{ |
|
29
|
39 |
|
$this->ecAdapter = $adapter; |
|
30
|
39 |
|
} |
|
31
|
|
|
|
|
32
|
|
|
/** |
|
33
|
|
|
* @return EcAdapterInterface |
|
34
|
|
|
*/ |
|
35
|
28 |
|
public function getEcAdapter() |
|
36
|
|
|
{ |
|
37
|
28 |
|
return $this->ecAdapter; |
|
38
|
|
|
} |
|
39
|
|
|
|
|
40
|
|
|
/** |
|
41
|
|
|
* @return Template |
|
42
|
|
|
*/ |
|
43
|
37 |
|
private function getInnerTemplate() |
|
44
|
|
|
{ |
|
45
|
37 |
|
return (new TemplateFactory()) |
|
46
|
37 |
|
->uint8() |
|
47
|
37 |
|
->varstring() |
|
48
|
37 |
|
->uint8() |
|
49
|
37 |
|
->varstring() |
|
50
|
37 |
|
->getTemplate(); |
|
51
|
|
|
} |
|
52
|
|
|
|
|
53
|
|
|
/** |
|
54
|
|
|
* @return Template |
|
55
|
|
|
*/ |
|
56
|
39 |
|
private function getOuterTemplate() |
|
57
|
|
|
{ |
|
58
|
39 |
|
return (new TemplateFactory()) |
|
59
|
39 |
|
->uint8() |
|
60
|
39 |
|
->varstring() |
|
61
|
39 |
|
->getTemplate(); |
|
62
|
|
|
} |
|
63
|
|
|
|
|
64
|
|
|
/** |
|
65
|
|
|
* @param SignatureInterface $signature |
|
66
|
|
|
* @return BufferInterface |
|
67
|
|
|
*/ |
|
68
|
35 |
|
public function serialize(SignatureInterface $signature) |
|
69
|
|
|
{ |
|
70
|
35 |
|
$math = $this->ecAdapter->getMath(); |
|
71
|
|
|
|
|
72
|
|
|
// Ensure that the R and S hex's are of even length |
|
73
|
35 |
|
$rBin = pack('H*', $math->decHex($signature->getR())); |
|
74
|
35 |
|
$sBin = pack('H*', $math->decHex($signature->getS())); |
|
75
|
|
|
|
|
76
|
|
|
// Pad R and S if their highest bit is flipped, ie, |
|
77
|
|
|
// they are negative. |
|
78
|
35 |
|
$rt = $rBin[0] & pack('H*', '80'); |
|
79
|
35 |
|
if (ord($rt) === 128) { |
|
80
|
14 |
|
$rBin = pack('H*', '00') . $rBin; |
|
81
|
7 |
|
} |
|
82
|
|
|
|
|
83
|
35 |
|
$st = $sBin[0] & pack('H*', '80'); |
|
84
|
35 |
|
if (ord($st) === 128) { |
|
85
|
7 |
|
$sBin = pack('H*', '00') . $sBin; |
|
86
|
4 |
|
} |
|
87
|
|
|
|
|
88
|
35 |
|
return $this->getOuterTemplate()->write([ |
|
89
|
35 |
|
0x30, |
|
90
|
35 |
|
$this->getInnerTemplate()->write([ |
|
91
|
35 |
|
0x02, |
|
92
|
35 |
|
new Buffer($rBin, null, $math), |
|
93
|
35 |
|
0x02, |
|
94
|
35 |
|
new Buffer($sBin, null, $math) |
|
95
|
18 |
|
]) |
|
96
|
18 |
|
]); |
|
97
|
|
|
} |
|
98
|
|
|
|
|
99
|
|
|
/** |
|
100
|
|
|
* @param Parser $parser |
|
101
|
|
|
* @return Signature |
|
102
|
|
|
* @throws ParserOutOfRange |
|
103
|
|
|
*/ |
|
104
|
32 |
|
public function fromParser(Parser $parser) |
|
105
|
|
|
{ |
|
106
|
|
|
try { |
|
107
|
32 |
|
list (, $inner) = $this->getOuterTemplate()->parse($parser); |
|
108
|
30 |
|
list (, $r, , $s) = $this->getInnerTemplate()->parse(new Parser($inner)); |
|
109
|
|
|
/** @var Buffer $r */ |
|
110
|
|
|
/** @var Buffer $s */ |
|
111
|
|
|
|
|
112
|
30 |
|
return new Signature( |
|
113
|
30 |
|
$this->ecAdapter, |
|
114
|
30 |
|
$r->getInt(), |
|
115
|
30 |
|
$s->getInt() |
|
116
|
15 |
|
); |
|
117
|
2 |
|
} catch (ParserOutOfRange $e) { |
|
118
|
2 |
|
throw new ParserOutOfRange('Failed to extract full signature from parser'); |
|
119
|
|
|
} |
|
120
|
|
|
} |
|
121
|
|
|
|
|
122
|
|
|
/** |
|
123
|
|
|
* @param BufferInterface|$string |
|
124
|
|
|
* @return Signature |
|
125
|
|
|
* @throws ParserOutOfRange |
|
126
|
|
|
*/ |
|
127
|
32 |
|
public function parse($string) |
|
128
|
|
|
{ |
|
129
|
32 |
|
$parser = new Parser($string); |
|
130
|
32 |
|
$signature = $this->fromParser($parser); |
|
131
|
30 |
|
return $signature; |
|
132
|
|
|
} |
|
133
|
|
|
} |
|
134
|
|
|
|
Bit-Wasp /
bitcoin-php
