|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\Serializer\Signature; |
|
4
|
|
|
|
|
5
|
|
|
use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\Adapter\EcAdapter; |
|
6
|
|
|
use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\Signature\CompactSignature; |
|
7
|
|
|
use BitWasp\Bitcoin\Crypto\EcAdapter\Serializer\Signature\CompactSignatureSerializerInterface; |
|
8
|
|
|
use BitWasp\Bitcoin\Crypto\EcAdapter\Signature\CompactSignatureInterface; |
|
9
|
|
|
use BitWasp\Buffertools\BufferInterface; |
|
10
|
|
|
use BitWasp\Buffertools\Exceptions\ParserOutOfRange; |
|
11
|
|
|
use BitWasp\Buffertools\Parser; |
|
12
|
|
|
use BitWasp\Buffertools\TemplateFactory; |
|
13
|
|
|
|
|
14
|
|
|
class CompactSignatureSerializer implements CompactSignatureSerializerInterface |
|
15
|
|
|
{ |
|
16
|
|
|
|
|
17
|
|
|
/** |
|
18
|
|
|
* @var EcAdapter |
|
19
|
|
|
*/ |
|
20
|
|
|
private $ecAdapter; |
|
21
|
|
|
|
|
22
|
|
|
/** |
|
23
|
|
|
* @param EcAdapter $adapter |
|
24
|
|
|
*/ |
|
25
|
20 |
|
public function __construct(EcAdapter $adapter) |
|
26
|
|
|
{ |
|
27
|
20 |
|
$this->ecAdapter = $adapter; |
|
28
|
20 |
|
} |
|
29
|
|
|
|
|
30
|
|
|
/** |
|
31
|
|
|
* @return \BitWasp\Buffertools\Template |
|
32
|
|
|
*/ |
|
33
|
14 |
|
private function getTemplate() |
|
34
|
|
|
{ |
|
35
|
14 |
|
return (new TemplateFactory()) |
|
36
|
14 |
|
->uint8() |
|
37
|
14 |
|
->uint256() |
|
38
|
14 |
|
->uint256() |
|
39
|
14 |
|
->getTemplate(); |
|
40
|
|
|
} |
|
41
|
|
|
|
|
42
|
|
|
/** |
|
43
|
|
|
* @param CompactSignature $signature |
|
44
|
|
|
* @return BufferInterface |
|
45
|
|
|
*/ |
|
46
|
10 |
|
private function doSerialize(CompactSignature $signature) |
|
47
|
|
|
{ |
|
48
|
10 |
|
return $this->getTemplate()->write([ |
|
49
|
10 |
|
$signature->getFlags(), |
|
50
|
10 |
|
gmp_strval($signature->getR(), 10), |
|
51
|
10 |
|
gmp_strval($signature->getS(), 10) |
|
52
|
|
|
]); |
|
53
|
|
|
} |
|
54
|
|
|
|
|
55
|
|
|
/** |
|
56
|
|
|
* @param CompactSignatureInterface $signature |
|
57
|
|
|
* @return BufferInterface |
|
58
|
|
|
*/ |
|
59
|
10 |
|
public function serialize(CompactSignatureInterface $signature) |
|
60
|
|
|
{ |
|
61
|
|
|
/** @var CompactSignature $signature */ |
|
62
|
10 |
|
return $this->doSerialize($signature); |
|
63
|
|
|
} |
|
64
|
|
|
|
|
65
|
|
|
/** |
|
66
|
|
|
* @param Parser $parser |
|
67
|
|
|
* @return CompactSignature |
|
68
|
|
|
* @throws ParserOutOfRange |
|
69
|
|
|
*/ |
|
70
|
14 |
|
public function fromParser(Parser $parser) |
|
71
|
|
|
{ |
|
72
|
14 |
|
$math = $this->ecAdapter->getMath(); |
|
73
|
|
|
|
|
74
|
|
|
try { |
|
75
|
14 |
|
list ($byte, $r, $s) = $this->getTemplate()->parse($parser); |
|
76
|
|
|
|
|
77
|
12 |
|
$recoveryFlags = $byte - 27; |
|
78
|
12 |
|
if ($recoveryFlags < 0 || $recoveryFlags > 7) { |
|
79
|
|
|
throw new \InvalidArgumentException('invalid signature type'); |
|
80
|
|
|
} |
|
81
|
|
|
|
|
82
|
12 |
|
$isCompressed = $math->cmp($math->bitwiseAnd(gmp_init($recoveryFlags), gmp_init(4)), gmp_init(0)) !== 0; |
|
83
|
12 |
|
$recoveryId = $recoveryFlags - ($isCompressed ? 4 : 0); |
|
84
|
2 |
|
} catch (ParserOutOfRange $e) { |
|
85
|
2 |
|
throw new ParserOutOfRange('Failed to extract full signature from parser'); |
|
86
|
|
|
} |
|
87
|
|
|
|
|
88
|
12 |
|
return new CompactSignature($this->ecAdapter, gmp_init($r, 10), gmp_init($s, 10), $recoveryId, $isCompressed); |
|
89
|
|
|
} |
|
90
|
|
|
|
|
91
|
|
|
/** |
|
92
|
|
|
* @param $string |
|
93
|
|
|
* @return CompactSignature |
|
94
|
|
|
* @throws ParserOutOfRange |
|
95
|
|
|
*/ |
|
96
|
14 |
|
public function parse($string) |
|
97
|
|
|
{ |
|
98
|
14 |
|
return $this->fromParser(new Parser($string, $this->ecAdapter->getMath())); |
|
99
|
|
|
} |
|
100
|
|
|
} |
|
101
|
|
|
|
Bit-Wasp /
bitcoin-php
