1
|
|
|
<?php |
2
|
|
|
/* Based on PHPSECLIB: https://github.com/phpseclib/phpseclib/blob/master/phpseclib/File/ASN1.php */ |
3
|
|
|
|
4
|
|
|
namespace vakata\asn1; |
5
|
|
|
|
6
|
|
|
/** |
7
|
|
|
* A class handling ASN1 decoding. |
8
|
|
|
*/ |
9
|
|
|
class LazyDecoder extends Decoder |
10
|
|
|
{ |
11
|
|
|
public function lazyDecodeHeader(array $header) |
12
|
|
|
{ |
13
|
|
|
$this->reader->seek($header['content_start']); |
14
|
|
|
if ($header['class'] !== ASN1::CLASS_UNIVERSAL && $header['constructed']) { |
15
|
|
|
$header['children'] = $this->lazyParse( |
16
|
|
|
null, |
17
|
|
|
$header['length'] ? $header['start'] + $header['length'] - 1 : null, |
18
|
|
|
'header' |
19
|
|
|
); |
20
|
|
|
} elseif ($header['class'] === ASN1::CLASS_UNIVERSAL && |
21
|
|
|
in_array($header['tag'], [ASN1::TYPE_SET, ASN1::TYPE_SEQUENCE]) |
22
|
|
|
) { |
23
|
|
|
$header['children'] = $this->lazyParse( |
24
|
|
|
null, |
25
|
|
|
$header['length'] ? $header['start'] + $header['length'] - 1 : null, |
26
|
|
|
'header' |
27
|
|
|
); |
28
|
|
|
} else { |
29
|
|
|
$header['value'] = $this->decode($header); |
30
|
|
|
} |
31
|
|
|
return $header; |
32
|
|
|
} |
33
|
|
|
public function lazyDecodeValue(array $header) |
34
|
|
|
{ |
35
|
|
|
$this->reader->seek($header['content_start']); |
36
|
|
|
if ($header['class'] !== ASN1::CLASS_UNIVERSAL && $header['constructed']) { |
37
|
|
|
return $this->lazyParse( |
38
|
|
|
null, |
39
|
|
|
$header['length'] ? $header['start'] + $header['length'] - 1 : null, |
40
|
|
|
'value' |
41
|
|
|
); |
42
|
|
|
} |
43
|
|
|
if ($header['class'] === ASN1::CLASS_UNIVERSAL && |
44
|
|
|
in_array($header['tag'], [ASN1::TYPE_SET, ASN1::TYPE_SEQUENCE]) |
45
|
|
|
) { |
46
|
|
|
return $this->lazyParse( |
47
|
|
|
null, |
48
|
|
|
$header['length'] ? $header['start'] + $header['length'] - 1 : null, |
49
|
|
|
'value' |
50
|
|
|
); |
51
|
|
|
} |
52
|
|
|
return $this->decode($header); |
53
|
|
|
} |
54
|
|
|
public function lazyParse($start = null, $max = null, string $mode = 'header') |
55
|
|
|
{ |
56
|
|
|
if ($start !== null) { |
57
|
|
|
$this->reader->seek($start); |
58
|
|
|
} |
59
|
|
|
$skeleton = []; |
60
|
|
|
while (!$this->reader->eof() && ($max === null || $this->reader->pos() < $max)) { |
61
|
|
|
$header = $this->header(); |
62
|
|
|
if ($header['class'] === 0 && $header['tag'] === 0) { |
63
|
|
|
if ($max === null) { |
64
|
|
|
break; |
65
|
|
|
} else { |
66
|
|
|
continue; |
67
|
|
|
} |
68
|
|
|
} |
69
|
|
|
if ($header['length'] === null) { |
70
|
|
|
$this->reader->readUntil(chr(0).chr(0)); |
71
|
|
|
$header['length'] = $this->reader->pos() - $header['start']; |
72
|
|
|
$header['content_length'] = $this->reader->pos() - $header['content_start']; |
73
|
|
|
} else { |
74
|
|
|
if ($header['content_length'] > 0) { |
75
|
|
|
$this->reader->bytes($header['content_length']); |
76
|
|
|
} |
77
|
|
|
} |
78
|
|
|
$skeleton[] = $header; |
79
|
|
|
} |
80
|
|
|
switch ($mode) { |
81
|
|
|
case 'value': |
82
|
|
|
return new LazyArray($skeleton, function ($v) { return $this->lazyDecodeValue($v); }); |
83
|
|
|
case 'header': |
84
|
|
|
default: |
85
|
|
|
return new LazyArray($skeleton, function ($v) { return $this->lazyDecodeHeader($v); }); |
86
|
|
|
} |
87
|
|
|
} |
88
|
|
|
public function structure($max = null) |
89
|
|
|
{ |
90
|
|
|
return $this->lazyParse(0, null, 'header'); |
91
|
|
|
} |
92
|
|
|
public function values($skeleton = null) |
93
|
|
|
{ |
94
|
|
|
return $this->lazyParse(0, null, 'value'); |
95
|
|
|
} |
96
|
|
|
public function map($map, $skeleton = null) |
97
|
|
|
{ |
98
|
|
|
$null = null; |
99
|
|
|
if ($skeleton === null && $this->reader->pos() !== 0) { |
100
|
|
|
$this->reader->rewind(); |
101
|
|
|
} |
102
|
|
|
$skeleton = $skeleton ?? $this->structure()[0] ?? null; |
103
|
|
|
if (!isset($skeleton)) { |
104
|
|
|
throw new ASN1Exception('No decoded data for map'); |
105
|
|
|
} |
106
|
|
|
if ($skeleton['class'] !== ASN1::CLASS_UNIVERSAL) { |
107
|
|
|
if ($map['tag'] === ASN1::TYPE_CHOICE) { |
108
|
|
|
foreach ($map['children'] as $child) { |
109
|
|
|
if (isset($child['name']) && (int)$skeleton['tag'] === (int)$child['name']) { |
110
|
|
|
$map = $child; |
111
|
|
|
if (isset($child['value']) && $child['value']) { |
112
|
|
|
return $child['value']; |
113
|
|
|
} |
114
|
|
|
break; |
115
|
|
|
} |
116
|
|
|
} |
117
|
|
|
} |
118
|
|
|
} |
119
|
|
|
if ($skeleton['class'] !== ASN1::CLASS_UNIVERSAL) { |
120
|
|
|
if (isset($map['implicit']) && $map['implicit']) { |
121
|
|
|
$skeleton['class'] = ASN1::CLASS_UNIVERSAL; |
122
|
|
|
$skeleton['tag'] = $map['tag']; |
123
|
|
|
} else { |
124
|
|
|
$skeleton = $skeleton['children'][0] ?? null; |
125
|
|
|
} |
126
|
|
|
} |
127
|
|
|
if ($map['tag'] === ASN1::TYPE_CHOICE) { |
128
|
|
|
foreach ($map['children'] as $child) { |
129
|
|
|
if ($skeleton['tag'] === $child['tag']) { |
130
|
|
|
$map = $child; |
131
|
|
|
if (isset($child['value']) && $child['value']) { |
132
|
|
|
return $child['value']; |
133
|
|
|
} |
134
|
|
|
break; |
135
|
|
|
} |
136
|
|
|
} |
137
|
|
|
} |
138
|
|
|
if (in_array($map['tag'], [ASN1::TYPE_SEQUENCE, ASN1::TYPE_SET]) && |
139
|
|
|
in_array($skeleton['tag'], [ASN1::TYPE_SEQUENCE, ASN1::TYPE_SET])) { |
140
|
|
|
$map['tag'] = $skeleton['tag']; |
141
|
|
|
} |
142
|
|
|
if ($map['tag'] === ASN1::TYPE_ANY && isset($skeleton['tag'])) { |
143
|
|
|
$map['tag'] = $skeleton['tag']; |
144
|
|
|
} |
145
|
|
|
if (!in_array($map['tag'], [ASN1::TYPE_ANY, ASN1::TYPE_ANY_RAW, ASN1::TYPE_ANY_SKIP, ASN1::TYPE_ANY_DER]) && |
146
|
|
|
$map['tag'] !== $skeleton['tag'] |
147
|
|
|
) { |
148
|
|
|
if (!isset($map['optional']) || !$map['optional']) { |
149
|
|
|
throw new ASN1Exception('Decoded data does not match mapping - ' . $skeleton['tag']); |
150
|
|
|
} |
151
|
|
|
return $null; |
152
|
|
|
} else { |
153
|
|
|
switch ($map['tag']) { |
154
|
|
|
case ASN1::TYPE_ANY_DER: |
155
|
|
|
$temp = $this->reader->chunk($skeleton['start'], $skeleton['length']); |
156
|
|
|
return $temp; |
157
|
|
|
case ASN1::TYPE_ANY_SKIP: |
158
|
|
|
return $null; |
159
|
|
|
case ASN1::TYPE_ANY_RAW: |
160
|
|
|
return $skeleton['value'] ?? null; |
161
|
|
|
case ASN1::TYPE_SET: |
162
|
|
|
if (isset($map['repeat'])) { |
163
|
|
|
$mapRepeat = $map['repeat']; |
164
|
|
|
$temp = $skeleton['children']->rawData(); |
165
|
|
|
return new LazyArray($temp, function ($v) use ($mapRepeat) { |
166
|
|
|
return $this->map($mapRepeat, $this->lazyDecodeHeader($v)); |
167
|
|
|
}); |
168
|
|
|
} else { |
169
|
|
|
if (!isset($map['children'])) { |
170
|
|
|
return $null; |
171
|
|
|
} |
172
|
|
|
$temp = $skeleton['children']; |
173
|
|
|
$result = []; |
174
|
|
|
// named first |
175
|
|
|
foreach ($map['children'] as $k => $v) { |
176
|
|
|
if (isset($v['name'])) { |
177
|
|
|
$result[$k] = null; |
178
|
|
|
foreach ($temp as $kk => $vv) { |
179
|
|
|
if ($vv['class'] !== ASN1::CLASS_UNIVERSAL && (int)$v['name'] === $vv['tag']) { |
180
|
|
|
try { |
181
|
|
|
if (isset($v['implicit']) && $v['implicit']) { |
182
|
|
|
$vv['class'] = ASN1::CLASS_UNIVERSAL; |
183
|
|
|
$vv['tag'] = $map['tag']; |
184
|
|
|
} else { |
185
|
|
|
$vv = $vv['children'][0] ?? null; |
186
|
|
|
} |
187
|
|
|
$result[$k] = $this->map($v, $vv); |
188
|
|
|
$vv['map'] = $v; |
189
|
|
|
$result[$k] = $vv; |
190
|
|
|
unset($temp[$kk]); |
191
|
|
|
break; |
192
|
|
|
} catch (ASN1Exception $e) { |
193
|
|
|
// continue trying other children in case of failure |
194
|
|
|
} |
195
|
|
|
} |
196
|
|
|
} |
197
|
|
|
if ($result[$k] === null && (!isset($v['optional']) || !$v['optional'])) { |
198
|
|
|
throw new ASN1Exception('Missing tagged type - ' . $k); |
199
|
|
|
} |
200
|
|
|
} |
201
|
|
|
} |
202
|
|
|
foreach ($map['children'] as $k => $v) { |
203
|
|
|
if (isset($v['name'])) { |
204
|
|
|
continue; |
205
|
|
|
} |
206
|
|
|
$result[$k] = null; |
207
|
|
|
foreach ($temp as $kk => $vv) { |
208
|
|
|
if ($v['tag'] === $vv['tag'] || |
209
|
|
|
in_array( |
210
|
|
|
$v['tag'], |
211
|
|
|
[ |
212
|
|
|
ASN1::TYPE_ANY, |
213
|
|
|
ASN1::TYPE_ANY_DER, |
214
|
|
|
ASN1::TYPE_ANY_RAW, |
215
|
|
|
ASN1::TYPE_ANY_SKIP, |
216
|
|
|
ASN1::TYPE_CHOICE |
217
|
|
|
] |
218
|
|
|
) |
219
|
|
|
) { |
220
|
|
|
try { |
221
|
|
|
$result[$k] = $this->map($v, $vv); |
222
|
|
|
$vv['map'] = $v; |
223
|
|
|
$result[$k] = $vv; |
224
|
|
|
unset($temp[$kk]); |
225
|
|
|
break; |
226
|
|
|
} catch (ASN1Exception $e) { |
227
|
|
|
$result[$k] = null; |
228
|
|
|
} |
229
|
|
|
} |
230
|
|
|
} |
231
|
|
|
if ($result[$k] === null && (!isset($v['optional']) || !$v['optional'])) { |
232
|
|
|
throw new ASN1Exception('Decoded data does not match mapping - ' . $k); |
233
|
|
|
} |
234
|
|
|
} |
235
|
|
|
return new LazyArray($result, function ($v) { |
236
|
|
|
return $v === null ? null : $this->map($v['map'], $this->lazyDecodeHeader($v)); |
237
|
|
|
}); |
238
|
|
|
} |
239
|
|
|
break; |
240
|
|
|
case ASN1::TYPE_SEQUENCE: |
241
|
|
|
if (isset($map['repeat'])) { |
242
|
|
|
$mapRepeat = $map['repeat']; |
243
|
|
|
$temp = $skeleton['children']->rawData(); |
244
|
|
|
return new LazyArray($temp, function ($v) use ($mapRepeat) { |
245
|
|
|
return $this->map($mapRepeat, $this->lazyDecodeHeader($v)); |
246
|
|
|
}); |
247
|
|
|
} else { |
248
|
|
|
if (!isset($map['children'])) { |
249
|
|
|
return $null; |
250
|
|
|
} |
251
|
|
|
$result = []; |
252
|
|
|
foreach ($skeleton['children'] as $vv) { |
253
|
|
|
foreach ($map['children'] as $k => $v) { |
254
|
|
|
if (isset($v['name']) && $vv['class'] !== ASN1::CLASS_UNIVERSAL && |
255
|
|
|
(int)$v['name'] === $vv['tag'] |
256
|
|
|
) { |
257
|
|
|
if (isset($v['implicit']) && $v['implicit']) { |
258
|
|
|
$vv['class'] = ASN1::CLASS_UNIVERSAL; |
259
|
|
|
$vv['tag'] = $map['tag']; |
260
|
|
|
} else { |
261
|
|
|
$vv = $vv['children'][0] ?? null; |
262
|
|
|
} |
263
|
|
|
$vv['map'] = $v; |
264
|
|
|
$result[$k] = $vv; |
265
|
|
|
unset($map['children'][$k]); |
266
|
|
|
break; |
267
|
|
|
} |
268
|
|
|
if (!isset($v['name']) && |
269
|
|
|
( |
270
|
|
|
$v['tag'] === $vv['tag'] || |
271
|
|
|
in_array( |
272
|
|
|
$v['tag'], |
273
|
|
|
[ |
274
|
|
|
ASN1::TYPE_ANY, |
275
|
|
|
ASN1::TYPE_ANY_DER, |
276
|
|
|
ASN1::TYPE_ANY_RAW, |
277
|
|
|
ASN1::TYPE_ANY_SKIP, |
278
|
|
|
ASN1::TYPE_CHOICE |
279
|
|
|
] |
280
|
|
|
) |
281
|
|
|
) |
282
|
|
|
) { |
283
|
|
|
try { |
284
|
|
|
$temp = $this->map($v, $vv); |
|
|
|
|
285
|
|
|
$vv['map'] = $v; |
286
|
|
|
$result[$k] = $vv; |
287
|
|
|
unset($map['children'][$k]); |
288
|
|
|
break; |
289
|
|
|
} catch (ASN1Exception $e) { |
290
|
|
|
// continue trying other children in case of failure |
291
|
|
|
} |
292
|
|
|
} |
293
|
|
|
if (!isset($v['optional']) || !$v['optional']) { |
294
|
|
|
throw new ASN1Exception('Missing type - ' . $k); |
295
|
|
|
} else { |
296
|
|
|
$result[$k] = null; |
297
|
|
|
unset($map['children'][$k]); |
298
|
|
|
} |
299
|
|
|
} |
300
|
|
|
} |
301
|
|
|
return new LazyArray($result, function ($v) { |
302
|
|
|
return $v === null ? null : $this->map($v['map'], $this->lazyDecodeHeader($v)); |
303
|
|
|
}); |
304
|
|
|
} |
305
|
|
|
break; |
306
|
|
|
case ASN1::TYPE_OBJECT_IDENTIFIER: |
307
|
|
|
$temp = isset($map['resolve']) && $map['resolve'] ? |
308
|
|
|
ASN1::OIDtoText($skeleton['value']) : |
309
|
|
|
$skeleton['value']; |
310
|
|
|
return $temp; |
311
|
|
|
case ASN1::TYPE_OCTET_STRING: |
312
|
|
|
if (isset($map['der']) && $map['der']) { |
313
|
|
|
$temp = static::fromString($skeleton['value']); |
314
|
|
|
$temp = isset($map['map']) ? $temp->map($map['map']) : $temp->values(); |
315
|
|
|
return $temp; |
316
|
|
|
} else { |
317
|
|
|
$temp = isset($map['raw']) && $map['raw'] ? |
318
|
|
|
$skeleton['value'] : |
319
|
|
|
base64_encode($skeleton['value']); |
320
|
|
|
return $temp; |
321
|
|
|
} |
322
|
|
|
break; |
323
|
|
|
case ASN1::TYPE_INTEGER: |
324
|
|
|
$base = isset($map['base']) && (int)$map['base'] ? (int)$map['base'] : 10; |
325
|
|
|
if ($base < 3) { |
326
|
|
|
$result = $skeleton['value']; |
327
|
|
|
} else { |
328
|
|
|
if (strlen($skeleton['value']) > 53 && $base === 16) { |
329
|
|
|
$hex = ''; |
330
|
|
|
for ($i = strlen($skeleton['value']) - 4; $i >= 0; $i-=4) { |
331
|
|
|
$hex .= dechex((int)bindec(substr($skeleton['value'], $i, 4))); |
332
|
|
|
} |
333
|
|
|
$result = strrev($hex); |
334
|
|
|
} else { |
335
|
|
|
$temp = base_convert($skeleton['value'], 2, $base); |
336
|
|
|
if ($base === 10) { |
337
|
|
|
$temp = (int)$temp; |
338
|
|
|
} |
339
|
|
|
$result = $temp; |
340
|
|
|
} |
341
|
|
|
} |
342
|
|
|
if (isset($map['map']) && isset($map['map'][$result])) { |
343
|
|
|
$result = $map['map'][$result]; |
344
|
|
|
} |
345
|
|
|
return $result; |
346
|
|
|
case ASN1::TYPE_UTC_TIME: |
347
|
|
|
case ASN1::TYPE_GENERALIZED_TIME: |
348
|
|
|
return $skeleton['value']; |
349
|
|
|
default: |
350
|
|
|
$result = $skeleton['value']; |
351
|
|
|
if (isset($map['map']) && isset($map['map'][$result])) { |
352
|
|
|
$result = $map['map'][$result]; |
353
|
|
|
} |
354
|
|
|
return $result; |
355
|
|
|
} |
356
|
|
|
} |
357
|
|
|
} |
358
|
|
|
} |
359
|
|
|
|