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Issue 13006020: net: extract net/cert out of net/base (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: rebase Created 7 years, 8 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "net/base/x509_util.h"
6 #include "net/base/x509_util_nss.h"
7
8 #include <cert.h>
9 #include <cryptohi.h>
10 #include <nss.h>
11 #include <pk11pub.h>
12 #include <prerror.h>
13 #include <secder.h>
14 #include <secmod.h>
15 #include <secport.h>
16
17 #include "base/debug/leak_annotations.h"
18 #include "base/logging.h"
19 #include "base/memory/scoped_ptr.h"
20 #include "base/memory/singleton.h"
21 #include "base/pickle.h"
22 #include "crypto/ec_private_key.h"
23 #include "crypto/nss_util.h"
24 #include "crypto/nss_util_internal.h"
25 #include "crypto/scoped_nss_types.h"
26 #include "crypto/third_party/nss/chromium-nss.h"
27 #include "net/base/x509_certificate.h"
28
29 namespace net {
30
31 namespace {
32
33 class DomainBoundCertOIDWrapper {
34 public:
35 static DomainBoundCertOIDWrapper* GetInstance() {
36 // Instantiated as a leaky singleton to allow the singleton to be
37 // constructed on a worker thead that is not joined when a process
38 // shuts down.
39 return Singleton<DomainBoundCertOIDWrapper,
40 LeakySingletonTraits<DomainBoundCertOIDWrapper> >::get();
41 }
42
43 SECOidTag domain_bound_cert_oid_tag() const {
44 return domain_bound_cert_oid_tag_;
45 }
46
47 private:
48 friend struct DefaultSingletonTraits<DomainBoundCertOIDWrapper>;
49
50 DomainBoundCertOIDWrapper();
51
52 SECOidTag domain_bound_cert_oid_tag_;
53
54 DISALLOW_COPY_AND_ASSIGN(DomainBoundCertOIDWrapper);
55 };
56
57 DomainBoundCertOIDWrapper::DomainBoundCertOIDWrapper()
58 : domain_bound_cert_oid_tag_(SEC_OID_UNKNOWN) {
59 // 1.3.6.1.4.1.11129.2.1.6
60 // (iso.org.dod.internet.private.enterprises.google.googleSecurity.
61 // certificateExtensions.originBoundCertificate)
62 static const uint8 kObCertOID[] = {
63 0x2b, 0x06, 0x01, 0x04, 0x01, 0xd6, 0x79, 0x02, 0x01, 0x06
64 };
65 SECOidData oid_data;
66 memset(&oid_data, 0, sizeof(oid_data));
67 oid_data.oid.data = const_cast<uint8*>(kObCertOID);
68 oid_data.oid.len = sizeof(kObCertOID);
69 oid_data.offset = SEC_OID_UNKNOWN;
70 oid_data.desc = "Origin Bound Certificate";
71 oid_data.mechanism = CKM_INVALID_MECHANISM;
72 oid_data.supportedExtension = SUPPORTED_CERT_EXTENSION;
73 domain_bound_cert_oid_tag_ = SECOID_AddEntry(&oid_data);
74 if (domain_bound_cert_oid_tag_ == SEC_OID_UNKNOWN)
75 LOG(ERROR) << "OB_CERT OID tag creation failed";
76 }
77
78 // Creates a Certificate object that may be passed to the SignCertificate
79 // method to generate an X509 certificate.
80 // Returns NULL if an error is encountered in the certificate creation
81 // process.
82 // Caller responsible for freeing returned certificate object.
83 CERTCertificate* CreateCertificate(
84 SECKEYPublicKey* public_key,
85 const std::string& subject,
86 uint32 serial_number,
87 base::Time not_valid_before,
88 base::Time not_valid_after) {
89 // Create info about public key.
90 CERTSubjectPublicKeyInfo* spki =
91 SECKEY_CreateSubjectPublicKeyInfo(public_key);
92 if (!spki)
93 return NULL;
94
95 // Create the certificate request.
96 CERTName* subject_name =
97 CERT_AsciiToName(const_cast<char*>(subject.c_str()));
98 CERTCertificateRequest* cert_request =
99 CERT_CreateCertificateRequest(subject_name, spki, NULL);
100 SECKEY_DestroySubjectPublicKeyInfo(spki);
101
102 if (!cert_request) {
103 PRErrorCode prerr = PR_GetError();
104 LOG(ERROR) << "Failed to create certificate request: " << prerr;
105 CERT_DestroyName(subject_name);
106 return NULL;
107 }
108
109 CERTValidity* validity = CERT_CreateValidity(
110 crypto::BaseTimeToPRTime(not_valid_before),
111 crypto::BaseTimeToPRTime(not_valid_after));
112 if (!validity) {
113 PRErrorCode prerr = PR_GetError();
114 LOG(ERROR) << "Failed to create certificate validity object: " << prerr;
115 CERT_DestroyName(subject_name);
116 CERT_DestroyCertificateRequest(cert_request);
117 return NULL;
118 }
119 CERTCertificate* cert = CERT_CreateCertificate(serial_number, subject_name,
120 validity, cert_request);
121 if (!cert) {
122 PRErrorCode prerr = PR_GetError();
123 LOG(ERROR) << "Failed to create certificate: " << prerr;
124 }
125
126 // Cleanup for resources used to generate the cert.
127 CERT_DestroyName(subject_name);
128 CERT_DestroyValidity(validity);
129 CERT_DestroyCertificateRequest(cert_request);
130
131 return cert;
132 }
133
134 // Signs a certificate object, with |key| generating a new X509Certificate
135 // and destroying the passed certificate object (even when NULL is returned).
136 // The logic of this method references SignCert() in NSS utility certutil:
137 // http://mxr.mozilla.org/security/ident?i=SignCert.
138 // Returns true on success or false if an error is encountered in the
139 // certificate signing process.
140 bool SignCertificate(
141 CERTCertificate* cert,
142 SECKEYPrivateKey* key) {
143 // |arena| is used to encode the cert.
144 PLArenaPool* arena = cert->arena;
145 SECOidTag algo_id = SEC_GetSignatureAlgorithmOidTag(key->keyType,
146 SEC_OID_SHA1);
147 if (algo_id == SEC_OID_UNKNOWN)
148 return false;
149
150 SECStatus rv = SECOID_SetAlgorithmID(arena, &cert->signature, algo_id, 0);
151 if (rv != SECSuccess)
152 return false;
153
154 // Generate a cert of version 3.
155 *(cert->version.data) = 2;
156 cert->version.len = 1;
157
158 SECItem der = { siBuffer, NULL, 0 };
159
160 // Use ASN1 DER to encode the cert.
161 void* encode_result = SEC_ASN1EncodeItem(
162 NULL, &der, cert, SEC_ASN1_GET(CERT_CertificateTemplate));
163 if (!encode_result)
164 return false;
165
166 // Allocate space to contain the signed cert.
167 SECItem result = { siBuffer, NULL, 0 };
168
169 // Sign the ASN1 encoded cert and save it to |result|.
170 rv = DerSignData(arena, &result, &der, key, algo_id);
171 PORT_Free(der.data);
172 if (rv != SECSuccess) {
173 DLOG(ERROR) << "DerSignData: " << PORT_GetError();
174 return false;
175 }
176
177 // Save the signed result to the cert.
178 cert->derCert = result;
179
180 return true;
181 }
182
183 bool CreateDomainBoundCertInternal(
184 SECKEYPublicKey* public_key,
185 SECKEYPrivateKey* private_key,
186 const std::string& domain,
187 uint32 serial_number,
188 base::Time not_valid_before,
189 base::Time not_valid_after,
190 std::string* der_cert) {
191 CERTCertificate* cert = CreateCertificate(public_key,
192 "CN=anonymous.invalid",
193 serial_number,
194 not_valid_before,
195 not_valid_after);
196
197 if (!cert)
198 return false;
199
200 // Create opaque handle used to add extensions later.
201 void* cert_handle;
202 if ((cert_handle = CERT_StartCertExtensions(cert)) == NULL) {
203 LOG(ERROR) << "Unable to get opaque handle for adding extensions";
204 CERT_DestroyCertificate(cert);
205 return false;
206 }
207
208 // Create SECItem for IA5String encoding.
209 SECItem domain_string_item = {
210 siAsciiString,
211 (unsigned char*)domain.data(),
212 static_cast<unsigned>(domain.size())
213 };
214
215 // IA5Encode and arena allocate SECItem
216 SECItem* asn1_domain_string = SEC_ASN1EncodeItem(
217 cert->arena, NULL, &domain_string_item,
218 SEC_ASN1_GET(SEC_IA5StringTemplate));
219 if (asn1_domain_string == NULL) {
220 LOG(ERROR) << "Unable to get ASN1 encoding for domain in domain_bound_cert"
221 " extension";
222 CERT_DestroyCertificate(cert);
223 return false;
224 }
225
226 // Add the extension to the opaque handle
227 if (CERT_AddExtension(
228 cert_handle,
229 DomainBoundCertOIDWrapper::GetInstance()->domain_bound_cert_oid_tag(),
230 asn1_domain_string, PR_TRUE, PR_TRUE) != SECSuccess){
231 LOG(ERROR) << "Unable to add domain bound cert extension to opaque handle";
232 CERT_DestroyCertificate(cert);
233 return false;
234 }
235
236 // Copy extension into x509 cert
237 if (CERT_FinishExtensions(cert_handle) != SECSuccess){
238 LOG(ERROR) << "Unable to copy extension to X509 cert";
239 CERT_DestroyCertificate(cert);
240 return false;
241 }
242
243 if (!SignCertificate(cert, private_key)) {
244 CERT_DestroyCertificate(cert);
245 return false;
246 }
247
248 DCHECK(cert->derCert.len);
249 // XXX copied from X509Certificate::GetDEREncoded
250 der_cert->clear();
251 der_cert->append(reinterpret_cast<char*>(cert->derCert.data),
252 cert->derCert.len);
253 CERT_DestroyCertificate(cert);
254 return true;
255 }
256
257 #if defined(USE_NSS) || defined(OS_IOS)
258 // Callback for CERT_DecodeCertPackage(), used in
259 // CreateOSCertHandlesFromBytes().
260 SECStatus PR_CALLBACK CollectCertsCallback(void* arg,
261 SECItem** certs,
262 int num_certs) {
263 X509Certificate::OSCertHandles* results =
264 reinterpret_cast<X509Certificate::OSCertHandles*>(arg);
265
266 for (int i = 0; i < num_certs; ++i) {
267 X509Certificate::OSCertHandle handle =
268 X509Certificate::CreateOSCertHandleFromBytes(
269 reinterpret_cast<char*>(certs[i]->data), certs[i]->len);
270 if (handle)
271 results->push_back(handle);
272 }
273
274 return SECSuccess;
275 }
276
277 typedef scoped_ptr_malloc<
278 CERTName,
279 crypto::NSSDestroyer<CERTName, CERT_DestroyName> > ScopedCERTName;
280
281 // Create a new CERTName object from its encoded representation.
282 // |arena| is the allocation pool to use.
283 // |data| points to a DER-encoded X.509 DistinguishedName.
284 // Return a new CERTName pointer on success, or NULL.
285 CERTName* CreateCertNameFromEncoded(PLArenaPool* arena,
286 const base::StringPiece& data) {
287 if (!arena)
288 return NULL;
289
290 ScopedCERTName name(PORT_ArenaZNew(arena, CERTName));
291 if (!name.get())
292 return NULL;
293
294 SECItem item;
295 item.len = static_cast<unsigned int>(data.length());
296 item.data = reinterpret_cast<unsigned char*>(
297 const_cast<char*>(data.data()));
298
299 SECStatus rv = SEC_ASN1DecodeItem(
300 arena, name.get(), SEC_ASN1_GET(CERT_NameTemplate), &item);
301 if (rv != SECSuccess)
302 return NULL;
303
304 return name.release();
305 }
306
307 #endif // defined(USE_NSS) || defined(OS_IOS)
308
309 } // namespace
310
311 namespace x509_util {
312
313 CERTCertificate* CreateSelfSignedCert(
314 SECKEYPublicKey* public_key,
315 SECKEYPrivateKey* private_key,
316 const std::string& subject,
317 uint32 serial_number,
318 base::Time not_valid_before,
319 base::Time not_valid_after) {
320 CERTCertificate* cert = CreateCertificate(public_key,
321 subject,
322 serial_number,
323 not_valid_before,
324 not_valid_after);
325 if (!cert)
326 return NULL;
327
328 if (!SignCertificate(cert, private_key)) {
329 CERT_DestroyCertificate(cert);
330 return NULL;
331 }
332
333 return cert;
334 }
335
336 bool IsSupportedValidityRange(base::Time not_valid_before,
337 base::Time not_valid_after) {
338 CERTValidity* validity = CERT_CreateValidity(
339 crypto::BaseTimeToPRTime(not_valid_before),
340 crypto::BaseTimeToPRTime(not_valid_after));
341
342 if (!validity)
343 return false;
344
345 CERT_DestroyValidity(validity);
346 return true;
347 }
348
349 bool CreateDomainBoundCertEC(
350 crypto::ECPrivateKey* key,
351 const std::string& domain,
352 uint32 serial_number,
353 base::Time not_valid_before,
354 base::Time not_valid_after,
355 std::string* der_cert) {
356 DCHECK(key);
357 return CreateDomainBoundCertInternal(key->public_key(),
358 key->key(),
359 domain,
360 serial_number,
361 not_valid_before,
362 not_valid_after,
363 der_cert);
364 }
365
366 #if defined(USE_NSS) || defined(OS_IOS)
367 void ParsePrincipal(CERTName* name, CertPrincipal* principal) {
368 typedef char* (*CERTGetNameFunc)(CERTName* name);
369
370 // TODO(jcampan): add business_category and serial_number.
371 // TODO(wtc): NSS has the CERT_GetOrgName, CERT_GetOrgUnitName, and
372 // CERT_GetDomainComponentName functions, but they return only the most
373 // general (the first) RDN. NSS doesn't have a function for the street
374 // address.
375 static const SECOidTag kOIDs[] = {
376 SEC_OID_AVA_STREET_ADDRESS,
377 SEC_OID_AVA_ORGANIZATION_NAME,
378 SEC_OID_AVA_ORGANIZATIONAL_UNIT_NAME,
379 SEC_OID_AVA_DC };
380
381 std::vector<std::string>* values[] = {
382 &principal->street_addresses,
383 &principal->organization_names,
384 &principal->organization_unit_names,
385 &principal->domain_components };
386 DCHECK_EQ(arraysize(kOIDs), arraysize(values));
387
388 CERTRDN** rdns = name->rdns;
389 for (size_t rdn = 0; rdns[rdn]; ++rdn) {
390 CERTAVA** avas = rdns[rdn]->avas;
391 for (size_t pair = 0; avas[pair] != 0; ++pair) {
392 SECOidTag tag = CERT_GetAVATag(avas[pair]);
393 for (size_t oid = 0; oid < arraysize(kOIDs); ++oid) {
394 if (kOIDs[oid] == tag) {
395 SECItem* decode_item = CERT_DecodeAVAValue(&avas[pair]->value);
396 if (!decode_item)
397 break;
398 // TODO(wtc): Pass decode_item to CERT_RFC1485_EscapeAndQuote.
399 std::string value(reinterpret_cast<char*>(decode_item->data),
400 decode_item->len);
401 values[oid]->push_back(value);
402 SECITEM_FreeItem(decode_item, PR_TRUE);
403 break;
404 }
405 }
406 }
407 }
408
409 // Get CN, L, S, and C.
410 CERTGetNameFunc get_name_funcs[4] = {
411 CERT_GetCommonName, CERT_GetLocalityName,
412 CERT_GetStateName, CERT_GetCountryName };
413 std::string* single_values[4] = {
414 &principal->common_name, &principal->locality_name,
415 &principal->state_or_province_name, &principal->country_name };
416 for (size_t i = 0; i < arraysize(get_name_funcs); ++i) {
417 char* value = get_name_funcs[i](name);
418 if (value) {
419 single_values[i]->assign(value);
420 PORT_Free(value);
421 }
422 }
423 }
424
425 void ParseDate(const SECItem* der_date, base::Time* result) {
426 PRTime prtime;
427 SECStatus rv = DER_DecodeTimeChoice(&prtime, der_date);
428 DCHECK_EQ(SECSuccess, rv);
429 *result = crypto::PRTimeToBaseTime(prtime);
430 }
431
432 std::string ParseSerialNumber(const CERTCertificate* certificate) {
433 return std::string(reinterpret_cast<char*>(certificate->serialNumber.data),
434 certificate->serialNumber.len);
435 }
436
437 void GetSubjectAltName(CERTCertificate* cert_handle,
438 std::vector<std::string>* dns_names,
439 std::vector<std::string>* ip_addrs) {
440 if (dns_names)
441 dns_names->clear();
442 if (ip_addrs)
443 ip_addrs->clear();
444
445 SECItem alt_name;
446 SECStatus rv = CERT_FindCertExtension(cert_handle,
447 SEC_OID_X509_SUBJECT_ALT_NAME,
448 &alt_name);
449 if (rv != SECSuccess)
450 return;
451
452 PLArenaPool* arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
453 DCHECK(arena != NULL);
454
455 CERTGeneralName* alt_name_list;
456 alt_name_list = CERT_DecodeAltNameExtension(arena, &alt_name);
457 SECITEM_FreeItem(&alt_name, PR_FALSE);
458
459 CERTGeneralName* name = alt_name_list;
460 while (name) {
461 // DNSName and IPAddress are encoded as IA5String and OCTET STRINGs
462 // respectively, both of which can be byte copied from
463 // SECItemType::data into the appropriate output vector.
464 if (dns_names && name->type == certDNSName) {
465 dns_names->push_back(std::string(
466 reinterpret_cast<char*>(name->name.other.data),
467 name->name.other.len));
468 } else if (ip_addrs && name->type == certIPAddress) {
469 ip_addrs->push_back(std::string(
470 reinterpret_cast<char*>(name->name.other.data),
471 name->name.other.len));
472 }
473 name = CERT_GetNextGeneralName(name);
474 if (name == alt_name_list)
475 break;
476 }
477 PORT_FreeArena(arena, PR_FALSE);
478 }
479
480 X509Certificate::OSCertHandles CreateOSCertHandlesFromBytes(
481 const char* data,
482 int length,
483 X509Certificate::Format format) {
484 X509Certificate::OSCertHandles results;
485 if (length < 0)
486 return results;
487
488 crypto::EnsureNSSInit();
489
490 if (!NSS_IsInitialized())
491 return results;
492
493 switch (format) {
494 case X509Certificate::FORMAT_SINGLE_CERTIFICATE: {
495 X509Certificate::OSCertHandle handle =
496 X509Certificate::CreateOSCertHandleFromBytes(data, length);
497 if (handle)
498 results.push_back(handle);
499 break;
500 }
501 case X509Certificate::FORMAT_PKCS7: {
502 // Make a copy since CERT_DecodeCertPackage may modify it
503 std::vector<char> data_copy(data, data + length);
504
505 SECStatus result = CERT_DecodeCertPackage(&data_copy[0],
506 length, CollectCertsCallback, &results);
507 if (result != SECSuccess)
508 results.clear();
509 break;
510 }
511 default:
512 NOTREACHED() << "Certificate format " << format << " unimplemented";
513 break;
514 }
515
516 return results;
517 }
518
519 X509Certificate::OSCertHandle ReadOSCertHandleFromPickle(
520 PickleIterator* pickle_iter) {
521 const char* data;
522 int length;
523 if (!pickle_iter->ReadData(&data, &length))
524 return NULL;
525
526 return X509Certificate::CreateOSCertHandleFromBytes(data, length);
527 }
528
529 void GetPublicKeyInfo(CERTCertificate* handle,
530 size_t* size_bits,
531 X509Certificate::PublicKeyType* type) {
532 // Since we might fail, set the output parameters to default values first.
533 *type = X509Certificate::kPublicKeyTypeUnknown;
534 *size_bits = 0;
535
536 crypto::ScopedSECKEYPublicKey key(CERT_ExtractPublicKey(handle));
537 if (!key.get())
538 return;
539
540 *size_bits = SECKEY_PublicKeyStrengthInBits(key.get());
541
542 switch (key->keyType) {
543 case rsaKey:
544 *type = X509Certificate::kPublicKeyTypeRSA;
545 break;
546 case dsaKey:
547 *type = X509Certificate::kPublicKeyTypeDSA;
548 break;
549 case dhKey:
550 *type = X509Certificate::kPublicKeyTypeDH;
551 break;
552 case ecKey:
553 *type = X509Certificate::kPublicKeyTypeECDSA;
554 break;
555 default:
556 *type = X509Certificate::kPublicKeyTypeUnknown;
557 *size_bits = 0;
558 break;
559 }
560 }
561
562 bool GetIssuersFromEncodedList(
563 const std::vector<std::string>& encoded_issuers,
564 PLArenaPool* arena,
565 std::vector<CERTName*>* out) {
566 std::vector<CERTName*> result;
567 for (size_t n = 0; n < encoded_issuers.size(); ++n) {
568 CERTName* name = CreateCertNameFromEncoded(arena, encoded_issuers[n]);
569 if (name != NULL)
570 result.push_back(name);
571 }
572
573 if (result.size() == encoded_issuers.size()) {
574 out->swap(result);
575 return true;
576 }
577
578 for (size_t n = 0; n < result.size(); ++n)
579 CERT_DestroyName(result[n]);
580 return false;
581 }
582
583
584 bool IsCertificateIssuedBy(const std::vector<CERTCertificate*>& cert_chain,
585 const std::vector<CERTName*>& valid_issuers) {
586 for (size_t n = 0; n < cert_chain.size(); ++n) {
587 CERTName* cert_issuer = &cert_chain[n]->issuer;
588 for (size_t i = 0; i < valid_issuers.size(); ++i) {
589 if (CERT_CompareName(valid_issuers[i], cert_issuer) == SECEqual)
590 return true;
591 }
592 }
593 return false;
594 }
595
596 #endif // defined(USE_NSS) || defined(OS_IOS)
597
598 } // namespace x509_util
599
600 } // namespace net
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