1
|
|
|
<?php |
2
|
|
|
|
3
|
|
|
declare(strict_types = 1); |
4
|
|
|
|
5
|
|
|
namespace Sop\X509\CertificationPath\PathValidation; |
6
|
|
|
|
7
|
|
|
use Sop\CryptoBridge\Crypto; |
8
|
|
|
use Sop\X509\Certificate\Certificate; |
9
|
|
|
use Sop\X509\Certificate\Extension\CertificatePolicy\PolicyInformation; |
10
|
|
|
use Sop\X509\Certificate\TBSCertificate; |
11
|
|
|
use Sop\X509\CertificationPath\Exception\PathValidationException; |
12
|
|
|
|
13
|
|
|
/** |
14
|
|
|
* Implements certification path validation. |
15
|
|
|
* |
16
|
|
|
* @see https://tools.ietf.org/html/rfc5280#section-6 |
17
|
|
|
*/ |
18
|
|
|
class PathValidator |
19
|
|
|
{ |
20
|
|
|
/** |
21
|
|
|
* Crypto engine. |
22
|
|
|
* |
23
|
|
|
* @var Crypto |
24
|
|
|
*/ |
25
|
|
|
protected $_crypto; |
26
|
|
|
|
27
|
|
|
/** |
28
|
|
|
* Path validation configuration. |
29
|
|
|
* |
30
|
|
|
* @var PathValidationConfig |
31
|
|
|
*/ |
32
|
|
|
protected $_config; |
33
|
|
|
|
34
|
|
|
/** |
35
|
|
|
* Certification path. |
36
|
|
|
* |
37
|
|
|
* @var Certificate[] |
38
|
|
|
*/ |
39
|
|
|
protected $_certificates; |
40
|
|
|
|
41
|
|
|
/** |
42
|
|
|
* Certification path trust anchor. |
43
|
|
|
* |
44
|
|
|
* @var Certificate |
45
|
|
|
*/ |
46
|
|
|
protected $_trustAnchor; |
47
|
|
|
|
48
|
|
|
/** |
49
|
|
|
* Constructor. |
50
|
|
|
* |
51
|
|
|
* @param Crypto $crypto Crypto engine |
52
|
|
|
* @param PathValidationConfig $config Validation config |
53
|
|
|
* @param Certificate ...$certificates Certificates from the trust anchor to |
54
|
|
|
* the end-entity certificate |
55
|
|
|
*/ |
56
|
46 |
|
public function __construct(Crypto $crypto, PathValidationConfig $config, |
57
|
|
|
Certificate ...$certificates) |
58
|
|
|
{ |
59
|
46 |
|
if (!count($certificates)) { |
60
|
1 |
|
throw new \LogicException('No certificates.'); |
61
|
|
|
} |
62
|
45 |
|
$this->_crypto = $crypto; |
63
|
45 |
|
$this->_config = $config; |
64
|
45 |
|
$this->_certificates = $certificates; |
65
|
|
|
// if trust anchor is explicitly given in configuration |
66
|
45 |
|
if ($config->hasTrustAnchor()) { |
67
|
1 |
|
$this->_trustAnchor = $config->trustAnchor(); |
68
|
|
|
} else { |
69
|
44 |
|
$this->_trustAnchor = $certificates[0]; |
70
|
|
|
} |
71
|
45 |
|
} |
72
|
|
|
|
73
|
|
|
/** |
74
|
|
|
* Validate certification path. |
75
|
|
|
* |
76
|
|
|
* @throws PathValidationException |
77
|
|
|
* |
78
|
|
|
* @return PathValidationResult |
79
|
|
|
*/ |
80
|
45 |
|
public function validate(): PathValidationResult |
81
|
|
|
{ |
82
|
45 |
|
$n = count($this->_certificates); |
83
|
45 |
|
$state = ValidatorState::initialize( |
84
|
45 |
|
$this->_config, $this->_trustAnchor, $n); |
85
|
45 |
|
for ($i = 0; $i < $n; ++$i) { |
86
|
44 |
|
$state = $state->withIndex($i + 1); |
87
|
44 |
|
$cert = $this->_certificates[$i]; |
88
|
|
|
// process certificate (section 6.1.3.) |
89
|
44 |
|
$state = $this->_processCertificate($state, $cert); |
90
|
43 |
|
if (!$state->isFinal()) { |
91
|
|
|
// prepare next certificate (section 6.1.4.) |
92
|
43 |
|
$state = $this->_prepareNext($state, $cert); |
93
|
|
|
} |
94
|
|
|
} |
95
|
31 |
|
if (!isset($cert)) { |
96
|
1 |
|
throw new \LogicException('No certificates.'); |
97
|
|
|
} |
98
|
|
|
// wrap-up (section 6.1.5.) |
99
|
30 |
|
$state = $this->_wrapUp($state, $cert); |
100
|
|
|
// return outputs |
101
|
28 |
|
return $state->getResult($this->_certificates); |
102
|
|
|
} |
103
|
|
|
|
104
|
|
|
/** |
105
|
|
|
* Apply basic certificate processing according to RFC 5280 section 6.1.3. |
106
|
|
|
* |
107
|
|
|
* @see https://tools.ietf.org/html/rfc5280#section-6.1.3 |
108
|
|
|
* |
109
|
|
|
* @param ValidatorState $state |
110
|
|
|
* @param Certificate $cert |
111
|
|
|
* |
112
|
|
|
* @throws PathValidationException |
113
|
|
|
* |
114
|
|
|
* @return ValidatorState |
115
|
|
|
*/ |
116
|
44 |
|
private function _processCertificate(ValidatorState $state, |
117
|
|
|
Certificate $cert): ValidatorState |
118
|
|
|
{ |
119
|
|
|
// (a.1) verify signature |
120
|
44 |
|
$this->_verifySignature($state, $cert); |
121
|
|
|
// (a.2) check validity period |
122
|
44 |
|
$this->_checkValidity($cert); |
123
|
|
|
// (a.3) check that certificate is not revoked |
124
|
43 |
|
$this->_checkRevocation($cert); |
125
|
|
|
// (a.4) check issuer |
126
|
43 |
|
$this->_checkIssuer($state, $cert); |
127
|
|
|
// (b)(c) if certificate is self-issued and it is not |
128
|
|
|
// the final certificate in the path, skip this step |
129
|
43 |
|
if (!($cert->isSelfIssued() && !$state->isFinal())) { |
130
|
|
|
// (b) check permitted subtrees |
131
|
35 |
|
$this->_checkPermittedSubtrees($state, $cert); |
132
|
|
|
// (c) check excluded subtrees |
133
|
35 |
|
$this->_checkExcludedSubtrees($state, $cert); |
134
|
|
|
} |
135
|
43 |
|
$extensions = $cert->tbsCertificate()->extensions(); |
136
|
43 |
|
if ($extensions->hasCertificatePolicies()) { |
137
|
|
|
// (d) process policy information |
138
|
26 |
|
if ($state->hasValidPolicyTree()) { |
139
|
26 |
|
$state = $state->validPolicyTree()->processPolicies($state, $cert); |
140
|
|
|
} |
141
|
|
|
} else { |
142
|
|
|
// (e) certificate policies extension not present, |
143
|
|
|
// set the valid_policy_tree to NULL |
144
|
31 |
|
$state = $state->withoutValidPolicyTree(); |
145
|
|
|
} |
146
|
|
|
// (f) check that explicit_policy > 0 or valid_policy_tree is set |
147
|
43 |
|
if (!($state->explicitPolicy() > 0 || $state->hasValidPolicyTree())) { |
148
|
3 |
|
throw new PathValidationException('No valid policies.'); |
149
|
|
|
} |
150
|
43 |
|
return $state; |
151
|
|
|
} |
152
|
|
|
|
153
|
|
|
/** |
154
|
|
|
* Apply preparation for the certificate i+1 according to rfc5280 section |
155
|
|
|
* 6.1.4. |
156
|
|
|
* |
157
|
|
|
* @see https://tools.ietf.org/html/rfc5280#section-6.1.4 |
158
|
|
|
* |
159
|
|
|
* @param ValidatorState $state |
160
|
|
|
* @param Certificate $cert |
161
|
|
|
* |
162
|
|
|
* @return ValidatorState |
163
|
|
|
*/ |
164
|
43 |
|
private function _prepareNext(ValidatorState $state, |
165
|
|
|
Certificate $cert): ValidatorState |
166
|
|
|
{ |
167
|
|
|
// (a)(b) if policy mappings extension is present |
168
|
43 |
|
$state = $this->_preparePolicyMappings($state, $cert); |
169
|
|
|
// (c) assign working_issuer_name |
170
|
42 |
|
$state = $state->withWorkingIssuerName( |
171
|
42 |
|
$cert->tbsCertificate()->subject()); |
172
|
|
|
// (d)(e)(f) |
173
|
42 |
|
$state = $this->_setPublicKeyState($state, $cert); |
174
|
|
|
// (g) if name constraints extension is present |
175
|
42 |
|
$state = $this->_prepareNameConstraints($state, $cert); |
176
|
|
|
// (h) if certificate is not self-issued |
177
|
42 |
|
if (!$cert->isSelfIssued()) { |
178
|
21 |
|
$state = $this->_prepareNonSelfIssued($state); |
179
|
|
|
} |
180
|
|
|
// (i) if policy constraints extension is present |
181
|
42 |
|
$state = $this->_preparePolicyConstraints($state, $cert); |
182
|
|
|
// (j) if inhibit any policy extension is present |
183
|
42 |
|
$state = $this->_prepareInhibitAnyPolicy($state, $cert); |
184
|
|
|
// (k) check basic constraints |
185
|
42 |
|
$this->_processBasicContraints($cert); |
186
|
|
|
// (l) verify max_path_length |
187
|
40 |
|
$state = $this->_verifyMaxPathLength($state, $cert); |
188
|
|
|
// (m) check pathLenContraint |
189
|
40 |
|
$state = $this->_processPathLengthContraint($state, $cert); |
190
|
|
|
// (n) check key usage |
191
|
40 |
|
$this->_checkKeyUsage($cert); |
192
|
|
|
// (o) process relevant extensions |
193
|
39 |
|
return $this->_processExtensions($state, $cert); |
194
|
|
|
} |
195
|
|
|
|
196
|
|
|
/** |
197
|
|
|
* Apply wrap-up procedure according to RFC 5280 section 6.1.5. |
198
|
|
|
* |
199
|
|
|
* @see https://tools.ietf.org/html/rfc5280#section-6.1.5 |
200
|
|
|
* |
201
|
|
|
* @param ValidatorState $state |
202
|
|
|
* @param Certificate $cert |
203
|
|
|
* |
204
|
|
|
* @throws PathValidationException |
205
|
|
|
* |
206
|
|
|
* @return ValidatorState |
207
|
|
|
*/ |
208
|
30 |
|
private function _wrapUp(ValidatorState $state, |
209
|
|
|
Certificate $cert): ValidatorState |
210
|
|
|
{ |
211
|
30 |
|
$tbs_cert = $cert->tbsCertificate(); |
212
|
30 |
|
$extensions = $tbs_cert->extensions(); |
213
|
|
|
// (a) |
214
|
30 |
|
if ($state->explicitPolicy() > 0) { |
215
|
26 |
|
$state = $state->withExplicitPolicy($state->explicitPolicy() - 1); |
216
|
|
|
} |
217
|
|
|
// (b) |
218
|
30 |
|
if ($extensions->hasPolicyConstraints()) { |
219
|
13 |
|
$ext = $extensions->policyConstraints(); |
220
|
13 |
|
if ($ext->hasRequireExplicitPolicy() && |
221
|
13 |
|
0 === $ext->requireExplicitPolicy()) { |
222
|
1 |
|
$state = $state->withExplicitPolicy(0); |
223
|
|
|
} |
224
|
|
|
} |
225
|
|
|
// (c)(d)(e) |
226
|
30 |
|
$state = $this->_setPublicKeyState($state, $cert); |
227
|
|
|
// (f) process relevant extensions |
228
|
30 |
|
$state = $this->_processExtensions($state, $cert); |
229
|
|
|
// (g) intersection of valid_policy_tree and the initial-policy-set |
230
|
30 |
|
$state = $this->_calculatePolicyIntersection($state); |
231
|
|
|
// check that explicit_policy > 0 or valid_policy_tree is set |
232
|
30 |
|
if (!($state->explicitPolicy() > 0 || $state->hasValidPolicyTree())) { |
233
|
2 |
|
throw new PathValidationException('No valid policies.'); |
234
|
|
|
} |
235
|
|
|
// path validation succeeded |
236
|
28 |
|
return $state; |
237
|
|
|
} |
238
|
|
|
|
239
|
|
|
/** |
240
|
|
|
* Update working_public_key, working_public_key_parameters and |
241
|
|
|
* working_public_key_algorithm state variables from certificate. |
242
|
|
|
* |
243
|
|
|
* @param ValidatorState $state |
244
|
|
|
* @param Certificate $cert |
245
|
|
|
* |
246
|
|
|
* @return ValidatorState |
247
|
|
|
*/ |
248
|
42 |
|
private function _setPublicKeyState(ValidatorState $state, |
249
|
|
|
Certificate $cert): ValidatorState |
250
|
|
|
{ |
251
|
42 |
|
$pk_info = $cert->tbsCertificate()->subjectPublicKeyInfo(); |
252
|
|
|
// assign working_public_key |
253
|
42 |
|
$state = $state->withWorkingPublicKey($pk_info); |
254
|
|
|
// assign working_public_key_parameters |
255
|
42 |
|
$params = ValidatorState::getAlgorithmParameters( |
256
|
42 |
|
$pk_info->algorithmIdentifier()); |
257
|
42 |
|
if (null !== $params) { |
258
|
42 |
|
$state = $state->withWorkingPublicKeyParameters($params); |
259
|
|
|
} else { |
260
|
|
|
// if algorithms differ, set parameters to null |
261
|
1 |
|
if ($pk_info->algorithmIdentifier()->oid() !== |
262
|
1 |
|
$state->workingPublicKeyAlgorithm()->oid()) { |
263
|
1 |
|
$state = $state->withWorkingPublicKeyParameters(null); |
264
|
|
|
} |
265
|
|
|
} |
266
|
|
|
// assign working_public_key_algorithm |
267
|
42 |
|
return $state->withWorkingPublicKeyAlgorithm( |
268
|
42 |
|
$pk_info->algorithmIdentifier()); |
269
|
|
|
} |
270
|
|
|
|
271
|
|
|
/** |
272
|
|
|
* Verify certificate signature. |
273
|
|
|
* |
274
|
|
|
* @param ValidatorState $state |
275
|
|
|
* @param Certificate $cert |
276
|
|
|
* |
277
|
|
|
* @throws PathValidationException |
278
|
|
|
*/ |
279
|
44 |
|
private function _verifySignature(ValidatorState $state, |
280
|
|
|
Certificate $cert): void |
281
|
|
|
{ |
282
|
|
|
try { |
283
|
44 |
|
$valid = $cert->verify($state->workingPublicKey(), $this->_crypto); |
284
|
1 |
|
} catch (\RuntimeException $e) { |
285
|
1 |
|
throw new PathValidationException( |
286
|
1 |
|
'Failed to verify signature: ' . $e->getMessage(), 0, $e); |
287
|
|
|
} |
288
|
44 |
|
if (!$valid) { |
289
|
2 |
|
throw new PathValidationException( |
290
|
2 |
|
"Certificate signature doesn't match."); |
291
|
|
|
} |
292
|
44 |
|
} |
293
|
|
|
|
294
|
|
|
/** |
295
|
|
|
* Check certificate validity. |
296
|
|
|
* |
297
|
|
|
* @param Certificate $cert |
298
|
|
|
* |
299
|
|
|
* @throws PathValidationException |
300
|
|
|
*/ |
301
|
44 |
|
private function _checkValidity(Certificate $cert): void |
302
|
|
|
{ |
303
|
44 |
|
$refdt = $this->_config->dateTime(); |
304
|
44 |
|
$validity = $cert->tbsCertificate()->validity(); |
305
|
44 |
|
if ($validity->notBefore()->dateTime()->diff($refdt)->invert) { |
306
|
1 |
|
throw new PathValidationException( |
307
|
1 |
|
'Certificate validity period has not started.'); |
308
|
|
|
} |
309
|
43 |
|
if ($refdt->diff($validity->notAfter()->dateTime())->invert) { |
310
|
1 |
|
throw new PathValidationException('Certificate has expired.'); |
311
|
|
|
} |
312
|
43 |
|
} |
313
|
|
|
|
314
|
|
|
/** |
315
|
|
|
* Check certificate revocation. |
316
|
|
|
* |
317
|
|
|
* @param Certificate $cert |
318
|
|
|
*/ |
319
|
43 |
|
private function _checkRevocation(Certificate $cert) |
320
|
|
|
{ |
321
|
|
|
// @todo Implement CRL handling |
322
|
43 |
|
} |
323
|
|
|
|
324
|
|
|
/** |
325
|
|
|
* Check certificate issuer. |
326
|
|
|
* |
327
|
|
|
* @param ValidatorState $state |
328
|
|
|
* @param Certificate $cert |
329
|
|
|
* |
330
|
|
|
* @throws PathValidationException |
331
|
|
|
*/ |
332
|
43 |
|
private function _checkIssuer(ValidatorState $state, Certificate $cert): void |
333
|
|
|
{ |
334
|
43 |
|
if (!$cert->tbsCertificate()->issuer()->equals($state->workingIssuerName())) { |
335
|
1 |
|
throw new PathValidationException('Certification issuer mismatch.'); |
336
|
|
|
} |
337
|
43 |
|
} |
338
|
|
|
|
339
|
|
|
/** |
340
|
|
|
* @param ValidatorState $state |
341
|
|
|
* @param Certificate $cert |
342
|
|
|
*/ |
343
|
35 |
|
private function _checkPermittedSubtrees(ValidatorState $state, Certificate $cert) |
344
|
|
|
{ |
345
|
|
|
// @todo Implement |
346
|
35 |
|
$state->permittedSubtrees(); |
347
|
35 |
|
} |
348
|
|
|
|
349
|
|
|
/** |
350
|
|
|
* @param ValidatorState $state |
351
|
|
|
* @param Certificate $cert |
352
|
|
|
*/ |
353
|
35 |
|
private function _checkExcludedSubtrees(ValidatorState $state, Certificate $cert) |
354
|
|
|
{ |
355
|
|
|
// @todo Implement |
356
|
35 |
|
$state->excludedSubtrees(); |
357
|
35 |
|
} |
358
|
|
|
|
359
|
|
|
/** |
360
|
|
|
* Apply policy mappings handling for the preparation step. |
361
|
|
|
* |
362
|
|
|
* @param ValidatorState $state |
363
|
|
|
* @param Certificate $cert |
364
|
|
|
* |
365
|
|
|
* @throws PathValidationException |
366
|
|
|
* |
367
|
|
|
* @return ValidatorState |
368
|
|
|
*/ |
369
|
43 |
|
private function _preparePolicyMappings(ValidatorState $state, |
370
|
|
|
Certificate $cert): ValidatorState |
371
|
|
|
{ |
372
|
43 |
|
$extensions = $cert->tbsCertificate()->extensions(); |
373
|
43 |
|
if ($extensions->hasPolicyMappings()) { |
374
|
|
|
// (a) verify that anyPolicy mapping is not used |
375
|
4 |
|
if ($extensions->policyMappings()->hasAnyPolicyMapping()) { |
376
|
1 |
|
throw new PathValidationException('anyPolicy mapping found.'); |
377
|
|
|
} |
378
|
|
|
// (b) process policy mappings |
379
|
3 |
|
if ($state->hasValidPolicyTree()) { |
380
|
3 |
|
$state = $state->validPolicyTree()->processMappings($state, $cert); |
381
|
|
|
} |
382
|
|
|
} |
383
|
42 |
|
return $state; |
384
|
|
|
} |
385
|
|
|
|
386
|
|
|
/** |
387
|
|
|
* Apply name constraints handling for the preparation step. |
388
|
|
|
* |
389
|
|
|
* @param ValidatorState $state |
390
|
|
|
* @param Certificate $cert |
391
|
|
|
* |
392
|
|
|
* @return ValidatorState |
393
|
|
|
*/ |
394
|
42 |
|
private function _prepareNameConstraints(ValidatorState $state, |
395
|
|
|
Certificate $cert): ValidatorState |
396
|
|
|
{ |
397
|
42 |
|
$extensions = $cert->tbsCertificate()->extensions(); |
398
|
42 |
|
if ($extensions->hasNameConstraints()) { |
399
|
1 |
|
$state = $this->_processNameConstraints($state, $cert); |
400
|
|
|
} |
401
|
42 |
|
return $state; |
402
|
|
|
} |
403
|
|
|
|
404
|
|
|
/** |
405
|
|
|
* Apply preparation for a non-self-signed certificate. |
406
|
|
|
* |
407
|
|
|
* @param ValidatorState $state |
408
|
|
|
* |
409
|
|
|
* @return ValidatorState |
410
|
|
|
*/ |
411
|
21 |
|
private function _prepareNonSelfIssued(ValidatorState $state): ValidatorState |
412
|
|
|
{ |
413
|
|
|
// (h.1) |
414
|
21 |
|
if ($state->explicitPolicy() > 0) { |
415
|
20 |
|
$state = $state->withExplicitPolicy($state->explicitPolicy() - 1); |
416
|
|
|
} |
417
|
|
|
// (h.2) |
418
|
21 |
|
if ($state->policyMapping() > 0) { |
419
|
20 |
|
$state = $state->withPolicyMapping($state->policyMapping() - 1); |
420
|
|
|
} |
421
|
|
|
// (h.3) |
422
|
21 |
|
if ($state->inhibitAnyPolicy() > 0) { |
423
|
21 |
|
$state = $state->withInhibitAnyPolicy($state->inhibitAnyPolicy() - 1); |
424
|
|
|
} |
425
|
21 |
|
return $state; |
426
|
|
|
} |
427
|
|
|
|
428
|
|
|
/** |
429
|
|
|
* Apply policy constraints handling for the preparation step. |
430
|
|
|
* |
431
|
|
|
* @param ValidatorState $state |
432
|
|
|
* @param Certificate $cert |
433
|
|
|
* |
434
|
|
|
* @return ValidatorState |
435
|
|
|
*/ |
436
|
42 |
|
private function _preparePolicyConstraints(ValidatorState $state, |
437
|
|
|
Certificate $cert): ValidatorState |
438
|
|
|
{ |
439
|
42 |
|
$extensions = $cert->tbsCertificate()->extensions(); |
440
|
42 |
|
if (!$extensions->hasPolicyConstraints()) { |
441
|
41 |
|
return $state; |
442
|
|
|
} |
443
|
2 |
|
$ext = $extensions->policyConstraints(); |
444
|
|
|
// (i.1) |
445
|
2 |
|
if ($ext->hasRequireExplicitPolicy() && |
446
|
2 |
|
$ext->requireExplicitPolicy() < $state->explicitPolicy()) { |
447
|
2 |
|
$state = $state->withExplicitPolicy($ext->requireExplicitPolicy()); |
448
|
|
|
} |
449
|
|
|
// (i.2) |
450
|
2 |
|
if ($ext->hasInhibitPolicyMapping() && |
451
|
2 |
|
$ext->inhibitPolicyMapping() < $state->policyMapping()) { |
452
|
1 |
|
$state = $state->withPolicyMapping($ext->inhibitPolicyMapping()); |
453
|
|
|
} |
454
|
2 |
|
return $state; |
455
|
|
|
} |
456
|
|
|
|
457
|
|
|
/** |
458
|
|
|
* Apply inhibit any-policy handling for the preparation step. |
459
|
|
|
* |
460
|
|
|
* @param ValidatorState $state |
461
|
|
|
* @param Certificate $cert |
462
|
|
|
* |
463
|
|
|
* @return ValidatorState |
464
|
|
|
*/ |
465
|
42 |
|
private function _prepareInhibitAnyPolicy(ValidatorState $state, |
466
|
|
|
Certificate $cert): ValidatorState |
467
|
|
|
{ |
468
|
42 |
|
$extensions = $cert->tbsCertificate()->extensions(); |
469
|
42 |
|
if ($extensions->hasInhibitAnyPolicy()) { |
470
|
2 |
|
$ext = $extensions->inhibitAnyPolicy(); |
471
|
2 |
|
if ($ext->skipCerts() < $state->inhibitAnyPolicy()) { |
472
|
2 |
|
$state = $state->withInhibitAnyPolicy($ext->skipCerts()); |
473
|
|
|
} |
474
|
|
|
} |
475
|
42 |
|
return $state; |
476
|
|
|
} |
477
|
|
|
|
478
|
|
|
/** |
479
|
|
|
* Verify maximum certification path length for the preparation step. |
480
|
|
|
* |
481
|
|
|
* @param ValidatorState $state |
482
|
|
|
* @param Certificate $cert |
483
|
|
|
* |
484
|
|
|
* @throws PathValidationException |
485
|
|
|
* |
486
|
|
|
* @return ValidatorState |
487
|
|
|
*/ |
488
|
40 |
|
private function _verifyMaxPathLength(ValidatorState $state, |
489
|
|
|
Certificate $cert): ValidatorState |
490
|
|
|
{ |
491
|
40 |
|
if (!$cert->isSelfIssued()) { |
492
|
21 |
|
if ($state->maxPathLength() <= 0) { |
493
|
2 |
|
throw new PathValidationException( |
494
|
2 |
|
'Certification path length exceeded.'); |
495
|
|
|
} |
496
|
19 |
|
$state = $state->withMaxPathLength($state->maxPathLength() - 1); |
497
|
|
|
} |
498
|
40 |
|
return $state; |
499
|
|
|
} |
500
|
|
|
|
501
|
|
|
/** |
502
|
|
|
* Check key usage extension for the preparation step. |
503
|
|
|
* |
504
|
|
|
* @param Certificate $cert |
505
|
|
|
* |
506
|
|
|
* @throws PathValidationException |
507
|
|
|
*/ |
508
|
40 |
|
private function _checkKeyUsage(Certificate $cert): void |
509
|
|
|
{ |
510
|
40 |
|
$extensions = $cert->tbsCertificate()->extensions(); |
511
|
40 |
|
if ($extensions->hasKeyUsage()) { |
512
|
20 |
|
$ext = $extensions->keyUsage(); |
513
|
20 |
|
if (!$ext->isKeyCertSign()) { |
514
|
1 |
|
throw new PathValidationException('keyCertSign usage not set.'); |
515
|
|
|
} |
516
|
|
|
} |
517
|
39 |
|
} |
518
|
|
|
|
519
|
|
|
/** |
520
|
|
|
* @param ValidatorState $state |
521
|
|
|
* @param Certificate $cert |
522
|
|
|
* |
523
|
|
|
* @return ValidatorState |
524
|
|
|
*/ |
525
|
1 |
|
private function _processNameConstraints(ValidatorState $state, |
526
|
|
|
Certificate $cert): ValidatorState |
527
|
|
|
{ |
528
|
|
|
// @todo Implement |
529
|
1 |
|
return $state; |
530
|
|
|
} |
531
|
|
|
|
532
|
|
|
/** |
533
|
|
|
* Process basic constraints extension. |
534
|
|
|
* |
535
|
|
|
* @param Certificate $cert |
536
|
|
|
* |
537
|
|
|
* @throws PathValidationException |
538
|
|
|
*/ |
539
|
42 |
|
private function _processBasicContraints(Certificate $cert): void |
540
|
|
|
{ |
541
|
42 |
|
if (TBSCertificate::VERSION_3 === $cert->tbsCertificate()->version()) { |
542
|
39 |
|
$extensions = $cert->tbsCertificate()->extensions(); |
543
|
39 |
|
if (!$extensions->hasBasicConstraints()) { |
544
|
1 |
|
throw new PathValidationException( |
545
|
1 |
|
'v3 certificate must have basicConstraints extension.'); |
546
|
|
|
} |
547
|
|
|
// verify that cA is set to TRUE |
548
|
38 |
|
if (!$extensions->basicConstraints()->isCA()) { |
549
|
1 |
|
throw new PathValidationException( |
550
|
1 |
|
'Certificate is not a CA certificate.'); |
551
|
|
|
} |
552
|
|
|
} |
553
|
40 |
|
} |
554
|
|
|
|
555
|
|
|
/** |
556
|
|
|
* Process pathLenConstraint. |
557
|
|
|
* |
558
|
|
|
* @param ValidatorState $state |
559
|
|
|
* @param Certificate $cert |
560
|
|
|
* |
561
|
|
|
* @return ValidatorState |
562
|
|
|
*/ |
563
|
40 |
|
private function _processPathLengthContraint(ValidatorState $state, |
564
|
|
|
Certificate $cert): ValidatorState |
565
|
|
|
{ |
566
|
40 |
|
$extensions = $cert->tbsCertificate()->extensions(); |
567
|
40 |
|
if ($extensions->hasBasicConstraints()) { |
568
|
37 |
|
$ext = $extensions->basicConstraints(); |
569
|
37 |
|
if ($ext->hasPathLen()) { |
570
|
26 |
|
if ($ext->pathLen() < $state->maxPathLength()) { |
571
|
9 |
|
$state = $state->withMaxPathLength($ext->pathLen()); |
572
|
|
|
} |
573
|
|
|
} |
574
|
|
|
} |
575
|
40 |
|
return $state; |
576
|
|
|
} |
577
|
|
|
|
578
|
|
|
/** |
579
|
|
|
* @param ValidatorState $state |
580
|
|
|
* @param Certificate $cert |
581
|
|
|
* |
582
|
|
|
* @return ValidatorState |
583
|
|
|
*/ |
584
|
39 |
|
private function _processExtensions(ValidatorState $state, |
585
|
|
|
Certificate $cert): ValidatorState |
586
|
|
|
{ |
587
|
|
|
// @todo Implement |
588
|
39 |
|
return $state; |
589
|
|
|
} |
590
|
|
|
|
591
|
|
|
/** |
592
|
|
|
* @param ValidatorState $state |
593
|
|
|
* |
594
|
|
|
* @return ValidatorState |
595
|
|
|
*/ |
596
|
30 |
|
private function _calculatePolicyIntersection(ValidatorState $state): ValidatorState |
597
|
|
|
{ |
598
|
|
|
// (i) If the valid_policy_tree is NULL, the intersection is NULL |
599
|
30 |
|
if (!$state->hasValidPolicyTree()) { |
600
|
21 |
|
return $state; |
601
|
|
|
} |
602
|
|
|
// (ii) If the valid_policy_tree is not NULL and |
603
|
|
|
// the user-initial-policy-set is any-policy, the intersection |
604
|
|
|
// is the entire valid_policy_tree |
605
|
9 |
|
$initial_policies = $this->_config->policySet(); |
606
|
9 |
|
if (in_array(PolicyInformation::OID_ANY_POLICY, $initial_policies)) { |
607
|
3 |
|
return $state; |
608
|
|
|
} |
609
|
|
|
// (iii) If the valid_policy_tree is not NULL and the |
610
|
|
|
// user-initial-policy-set is not any-policy, calculate |
611
|
|
|
// the intersection of the valid_policy_tree and the |
612
|
|
|
// user-initial-policy-set as follows |
613
|
6 |
|
return $state->validPolicyTree()->calculateIntersection($state, $initial_policies); |
614
|
|
|
} |
615
|
|
|
} |
616
|
|
|
|