|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace BitWasp\Trezor\Bridge\Codec\CallMessage; |
|
6
|
|
|
|
|
7
|
|
|
use BitWasp\Trezor\Bridge\Exception\InvalidMessageException; |
|
8
|
|
|
use Psr\Http\Message\StreamInterface; |
|
9
|
|
|
|
|
10
|
|
|
class HexCodec |
|
11
|
|
|
{ |
|
12
|
2 |
|
private function intcmp(int $a, int $b): int |
|
13
|
|
|
{ |
|
14
|
2 |
|
return ($a < $b) ? -1 : (($a > $b) ? 1 : 0); |
|
15
|
|
|
} |
|
16
|
|
|
|
|
17
|
2 |
|
private function hex2bin(StreamInterface $stream): \Protobuf\Stream |
|
18
|
|
|
{ |
|
19
|
2 |
|
$hex = $stream->getContents(); |
|
20
|
2 |
|
if (!ctype_xdigit($hex)) { |
|
21
|
|
|
throw new InvalidMessageException("Invalid hex as input"); |
|
22
|
|
|
} |
|
23
|
|
|
|
|
24
|
2 |
|
return \Protobuf\Stream::fromString(pack("H*", $hex)); |
|
25
|
|
|
} |
|
26
|
|
|
|
|
27
|
2 |
|
public function parsePayload(StreamInterface $stream): array |
|
28
|
|
|
{ |
|
29
|
2 |
|
if ($stream->getSize() < 12) { |
|
30
|
|
|
throw new InvalidMessageException("Malformed data (size too small)"); |
|
31
|
|
|
} |
|
32
|
|
|
|
|
33
|
2 |
|
$stream = $this->hex2bin($stream); |
|
34
|
|
|
|
|
35
|
|
|
// relies on php returning the variables in order defined in unpack string |
|
36
|
2 |
|
list ($type, $size) = array_values(unpack('n1type/N1size', $stream->read(6))); |
|
37
|
2 |
|
$stream->seek(6); |
|
38
|
|
|
|
|
39
|
2 |
|
$lCmp = $this->intcmp($stream->getSize() - 6, $size); |
|
40
|
2 |
|
if ($lCmp < 0) { |
|
41
|
|
|
throw new InvalidMessageException("Malformed data (not enough data)"); |
|
42
|
2 |
|
} else if ($lCmp > 0) { |
|
43
|
|
|
throw new InvalidMessageException("Malformed data (too much data)"); |
|
44
|
|
|
} |
|
45
|
|
|
|
|
46
|
2 |
|
return [$type, \Protobuf\Stream::wrap($stream->read($size))]; |
|
47
|
|
|
} |
|
48
|
|
|
|
|
49
|
2 |
|
public function encode(int $messageType, \Protobuf\Message $protobuf): string |
|
50
|
|
|
{ |
|
51
|
2 |
|
$stream = $protobuf->toStream(); |
|
52
|
2 |
|
return unpack('H*', pack('nN', $messageType, $stream->getSize()) . $stream->getContents())[1]; |
|
53
|
|
|
} |
|
54
|
|
|
} |
|
55
|
|
|
|
Bit-Wasp /
trezor-bridge-client
