|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace BitWasp\Bitcoin; |
|
6
|
|
|
|
|
7
|
|
|
use \BitWasp\Bech32\Exception\Bech32Exception; |
|
8
|
|
|
|
|
9
|
|
|
class Bech32 |
|
10
|
|
|
{ |
|
11
|
|
|
/** |
|
12
|
|
|
* @var string |
|
13
|
|
|
*/ |
|
14
|
|
|
protected static $charset = 'qpzry9x8gf2tvdw0s3jn54khce6mua7l'; |
|
15
|
|
|
|
|
16
|
|
|
/** |
|
17
|
|
|
* @var array |
|
18
|
|
|
*/ |
|
19
|
|
|
protected static $charsetKey = [ |
|
20
|
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
|
21
|
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
|
22
|
|
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
|
23
|
|
|
15, -1, 10, 17, 21, 20, 26, 30, 7, 5, -1, -1, -1, -1, -1, -1, |
|
24
|
|
|
-1, 29, -1, 24, 13, 25, 9, 8, 23, -1, 18, 22, 31, 27, 19, -1, |
|
25
|
|
|
1, 0, 3, 16, 11, 28, 12, 14, 6, 4, 2, -1, -1, -1, -1, -1, |
|
26
|
|
|
-1, 29, -1, 24, 13, 25, 9, 8, 23, -1, 18, 22, 31, 27, 19, -1, |
|
27
|
|
|
1, 0, 3, 16, 11, 28, 12, 14, 6, 4, 2, -1, -1, -1, -1, -1 |
|
28
|
|
|
]; |
|
29
|
|
|
|
|
30
|
|
|
/** |
|
31
|
|
|
* @var array |
|
32
|
|
|
*/ |
|
33
|
|
|
protected static $generator = [0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3]; |
|
34
|
|
|
|
|
35
|
|
|
/** |
|
36
|
|
|
* @param int[] $values |
|
37
|
|
|
* @param int $numValues |
|
38
|
|
|
* @return int |
|
39
|
|
|
*/ |
|
40
|
|
|
public static function polyMod(array $values, int $numValues): int |
|
41
|
|
|
{ |
|
42
|
|
|
$chk = 1; |
|
43
|
|
|
for ($i = 0; $i < $numValues; $i++) { |
|
44
|
|
|
$top = $chk >> 25; |
|
45
|
|
|
$chk = ($chk & 0x1ffffff) << 5 ^ $values[$i]; |
|
46
|
|
|
|
|
47
|
|
|
for ($j = 0; $j < 5; $j++) { |
|
48
|
|
|
$value = (($top >> $j) & 1) ? self::$generator[$j] : 0; |
|
49
|
|
|
$chk ^= $value; |
|
50
|
|
|
} |
|
51
|
|
|
} |
|
52
|
|
|
|
|
53
|
|
|
return $chk; |
|
54
|
|
|
} |
|
55
|
|
|
|
|
56
|
|
|
/** |
|
57
|
|
|
* Expands the human readable part into a character array for checksumming. |
|
58
|
|
|
* @param string $hrp |
|
59
|
|
|
* @param int $hrpLen |
|
60
|
|
|
* @return int[] |
|
61
|
|
|
*/ |
|
62
|
|
|
public static function hrpExpand(string $hrp, int $hrpLen): array |
|
63
|
|
|
{ |
|
64
|
|
|
$expand1 = []; |
|
65
|
|
|
$expand2 = []; |
|
66
|
|
|
for ($i = 0; $i < $hrpLen; $i++) { |
|
67
|
|
|
$o = ord($hrp[$i]); |
|
68
|
|
|
$expand1[] = $o >> 5; |
|
69
|
|
|
$expand2[] = $o & 31; |
|
70
|
|
|
} |
|
71
|
|
|
|
|
72
|
|
|
return array_merge($expand1, [0], $expand2); |
|
73
|
|
|
} |
|
74
|
|
|
|
|
75
|
|
|
/** |
|
76
|
|
|
* Converts words of $fromBits bits to $toBits bits in size. |
|
77
|
|
|
* |
|
78
|
|
|
* @param int[] $data - character array of data to convert |
|
79
|
|
|
* @param int $inLen - number of elements in array |
|
80
|
|
|
* @param int $fromBits - word (bit count) size of provided data |
|
81
|
|
|
* @param int $toBits - requested word size (bit count) |
|
82
|
|
|
* @param bool $pad - whether to pad (only when encoding) |
|
83
|
|
|
* @return int[] |
|
84
|
|
|
* @throws Bech32Exception |
|
85
|
|
|
*/ |
|
86
|
1 |
|
public static function convertBits(array $data, int $inLen, int $fromBits, int $toBits, bool $pad = true): array |
|
87
|
|
|
{ |
|
88
|
1 |
|
$acc = 0; |
|
89
|
1 |
|
$bits = 0; |
|
90
|
1 |
|
$ret = []; |
|
91
|
1 |
|
$maxv = (1 << $toBits) - 1; |
|
92
|
1 |
|
$maxacc = (1 << ($fromBits + $toBits - 1)) - 1; |
|
93
|
|
|
|
|
94
|
1 |
|
for ($i = 0; $i < $inLen; $i++) { |
|
95
|
1 |
|
$value = $data[$i]; |
|
96
|
1 |
|
if ($value < 0 || $value >> $fromBits) { |
|
97
|
1 |
|
throw new Bech32Exception('Invalid value for convert bits'); |
|
98
|
|
|
} |
|
99
|
|
|
|
|
100
|
|
|
$acc = (($acc << $fromBits) | $value) & $maxacc; |
|
101
|
|
|
$bits += $fromBits; |
|
102
|
|
|
|
|
103
|
|
|
while ($bits >= $toBits) { |
|
104
|
|
|
$bits -= $toBits; |
|
105
|
|
|
$ret[] = (($acc >> $bits) & $maxv); |
|
106
|
|
|
} |
|
107
|
|
|
} |
|
108
|
|
|
|
|
109
|
|
|
if ($pad) { |
|
110
|
|
|
if ($bits) { |
|
111
|
|
|
$ret[] = ($acc << $toBits - $bits) & $maxv; |
|
112
|
|
|
} |
|
113
|
|
|
} else if ($bits >= $fromBits || ((($acc << ($toBits - $bits))) & $maxv)) { |
|
114
|
|
|
throw new \BitWasp\Bech32\Exception\Bech32Exception('Invalid data'); |
|
115
|
|
|
} |
|
116
|
|
|
|
|
117
|
|
|
return $ret; |
|
118
|
|
|
} |
|
119
|
|
|
|
|
120
|
|
|
/** |
|
121
|
|
|
* @param string $hrp |
|
122
|
|
|
* @param int[] $convertedDataChars |
|
123
|
|
|
* @return int[] |
|
124
|
|
|
*/ |
|
125
|
|
|
public static function createChecksum(string $hrp, array $convertedDataChars): array |
|
126
|
|
|
{ |
|
127
|
|
|
$values = array_merge(self::hrpExpand($hrp, strlen($hrp)), $convertedDataChars); |
|
128
|
|
|
$polyMod = self::polyMod(array_merge($values, [0, 0, 0, 0, 0, 0]), count($values) + 6) ^ 1; |
|
129
|
|
|
$results = []; |
|
130
|
|
|
for ($i = 0; $i < 6; $i++) { |
|
131
|
|
|
$results[$i] = ($polyMod >> 5 * (5 - $i)) & 31; |
|
132
|
|
|
} |
|
133
|
|
|
|
|
134
|
|
|
return $results; |
|
135
|
|
|
} |
|
136
|
|
|
|
|
137
|
|
|
/** |
|
138
|
|
|
* Verifies the checksum given $hrp and $convertedDataChars. |
|
139
|
|
|
* |
|
140
|
|
|
* @param string $hrp |
|
141
|
|
|
* @param int[] $convertedDataChars |
|
142
|
|
|
* @return bool |
|
143
|
|
|
*/ |
|
144
|
|
|
public static function verifyChecksum(string $hrp, array $convertedDataChars): bool |
|
145
|
|
|
{ |
|
146
|
|
|
$expandHrp = self::hrpExpand($hrp, strlen($hrp)); |
|
147
|
|
|
$r = array_merge($expandHrp, $convertedDataChars); |
|
148
|
|
|
$poly = self::polyMod($r, count($r)); |
|
149
|
|
|
return $poly === 1; |
|
150
|
|
|
} |
|
151
|
|
|
|
|
152
|
|
|
/** |
|
153
|
|
|
* @param string $hrp |
|
154
|
|
|
* @param array $combinedDataChars |
|
155
|
|
|
* @return string |
|
156
|
|
|
*/ |
|
157
|
|
|
public static function encode(string $hrp, array $combinedDataChars): string |
|
158
|
|
|
{ |
|
159
|
|
|
$checksum = self::createChecksum($hrp, $combinedDataChars); |
|
160
|
|
|
$characters = array_merge($combinedDataChars, $checksum); |
|
161
|
|
|
|
|
162
|
|
|
$encoded = []; |
|
163
|
|
|
for ($i = 0, $n = count($characters); $i < $n; $i++) { |
|
164
|
|
|
$encoded[$i] = self::$charset[$characters[$i]]; |
|
165
|
|
|
} |
|
166
|
|
|
|
|
167
|
|
|
return "{$hrp}1" . implode('', $encoded); |
|
168
|
|
|
} |
|
169
|
|
|
|
|
170
|
|
|
/** |
|
171
|
|
|
* Validates a bech32 string and returns [$hrp, $dataChars] if |
|
172
|
|
|
* the conversion was successful. An exception is thrown on invalid |
|
173
|
|
|
* data. |
|
174
|
|
|
* |
|
175
|
|
|
* @param string $sBech - the bech32 encoded string |
|
176
|
|
|
* @return array - returns [$hrp, $dataChars] |
|
177
|
|
|
* @throws Bech32Exception |
|
178
|
|
|
*/ |
|
179
|
9 |
|
public static function decode(string $sBech): array |
|
180
|
|
|
{ |
|
181
|
9 |
|
return \BitWasp\Bech32\decode($sBech); |
|
182
|
|
|
} |
|
183
|
|
|
} |
|
184
|
|
|
|
Bit-Wasp /
bitcoin-php
