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Log most X.509 related messages in new ASN log group.
[strongswan.git] / src / libstrongswan / plugins / x509 / x509_cert.c
1 /*
2 * Copyright (C) 2000 Andreas Hess, Patric Lichtsteiner, Roger Wegmann
3 * Copyright (C) 2001 Marco Bertossa, Andreas Schleiss
4 * Copyright (C) 2002 Mario Strasser
5 * Copyright (C) 2000-2006 Andreas Steffen
6 * Copyright (C) 2006-2009 Martin Willi
7 * Copyright (C) 2008 Tobias Brunner
8 * Hochschule fuer Technik Rapperswil
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
17 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 * for more details.
19 */
20
21 #define _GNU_SOURCE
22
23 #include "x509_cert.h"
24
25 #include <sys/stat.h>
26 #include <time.h>
27 #include <unistd.h>
28 #include <string.h>
29 #include <stdio.h>
30
31 #include <library.h>
32 #include <debug.h>
33 #include <asn1/oid.h>
34 #include <asn1/asn1.h>
35 #include <asn1/asn1_parser.h>
36 #include <crypto/hashers/hasher.h>
37 #include <credentials/keys/private_key.h>
38 #include <utils/linked_list.h>
39 #include <utils/identification.h>
40 #include <selectors/traffic_selector.h>
41
42 /**
43 * Different kinds of generalNames
44 */
45 typedef enum {
46 GN_OTHER_NAME = 0,
47 GN_RFC822_NAME = 1,
48 GN_DNS_NAME = 2,
49 GN_X400_ADDRESS = 3,
50 GN_DIRECTORY_NAME = 4,
51 GN_EDI_PARTY_NAME = 5,
52 GN_URI = 6,
53 GN_IP_ADDRESS = 7,
54 GN_REGISTERED_ID = 8,
55 } generalNames_t;
56
57
58 typedef struct private_x509_cert_t private_x509_cert_t;
59
60 /**
61 * Private data of a x509_cert_t object.
62 */
63 struct private_x509_cert_t {
64 /**
65 * Public interface for this certificate.
66 */
67 x509_cert_t public;
68
69 /**
70 * X.509 certificate encoding in ASN.1 DER format
71 */
72 chunk_t encoding;
73
74 /**
75 * SHA1 hash of the DER encoding of this X.509 certificate
76 */
77 chunk_t encoding_hash;
78
79 /**
80 * X.509 certificate body over which signature is computed
81 */
82 chunk_t tbsCertificate;
83
84 /**
85 * Version of the X.509 certificate
86 */
87 u_int version;
88
89 /**
90 * Serial number of the X.509 certificate
91 */
92 chunk_t serialNumber;
93
94 /**
95 * ID representing the certificate issuer
96 */
97 identification_t *issuer;
98
99 /**
100 * Start time of certificate validity
101 */
102 time_t notBefore;
103
104 /**
105 * End time of certificate validity
106 */
107 time_t notAfter;
108
109 /**
110 * ID representing the certificate subject
111 */
112 identification_t *subject;
113
114 /**
115 * List of subjectAltNames as identification_t
116 */
117 linked_list_t *subjectAltNames;
118
119 /**
120 * List of crlDistributionPoints as x509_cdp_t*
121 */
122 linked_list_t *crl_uris;
123
124 /**
125 * List of ocspAccessLocations as allocated char*
126 */
127 linked_list_t *ocsp_uris;
128
129 /**
130 * List of ipAddrBlocks as traffic_selector_t
131 */
132 linked_list_t *ipAddrBlocks;
133
134 /**
135 * List of permitted name constraints
136 */
137 linked_list_t *permitted_names;
138
139 /**
140 * List of exluced name constraints
141 */
142 linked_list_t *excluded_names;
143
144 /**
145 * List of certificatePolicies, as x509_cert_policy_t
146 */
147 linked_list_t *cert_policies;
148
149 /**
150 * List of policyMappings, as x509_policy_mapping_t
151 */
152 linked_list_t *policy_mappings;
153
154 /**
155 * certificate's embedded public key
156 */
157 public_key_t *public_key;
158
159 /**
160 * Subject Key Identifier
161 */
162 chunk_t subjectKeyIdentifier;
163
164 /**
165 * Authority Key Identifier
166 */
167 chunk_t authKeyIdentifier;
168
169 /**
170 * Authority Key Serial Number
171 */
172 chunk_t authKeySerialNumber;
173
174 /**
175 * Path Length Constraint
176 */
177 u_char pathLenConstraint;
178
179 /**
180 * requireExplicitPolicy Constraint
181 */
182 u_char require_explicit;
183
184 /**
185 * inhibitPolicyMapping Constraint
186 */
187 u_char inhibit_mapping;
188
189 /**
190 * inhibitAnyPolicy Constraint
191 */
192 u_char inhibit_any;
193
194 /**
195 * x509 constraints and other flags
196 */
197 x509_flag_t flags;
198
199 /**
200 * Signature algorithm
201 */
202 int algorithm;
203
204 /**
205 * Signature
206 */
207 chunk_t signature;
208
209 /**
210 * Certificate parsed from blob/file?
211 */
212 bool parsed;
213
214 /**
215 * reference count
216 */
217 refcount_t ref;
218 };
219
220 static const chunk_t ASN1_subjectAltName_oid = chunk_from_chars(
221 0x06, 0x03, 0x55, 0x1D, 0x11
222 );
223
224 /**
225 * Destroy a CertificateDistributionPoint
226 */
227 static void crl_uri_destroy(x509_cdp_t *this)
228 {
229 free(this->uri);
230 DESTROY_IF(this->issuer);
231 free(this);
232 }
233
234 /**
235 * Destroy a CertificatePolicy
236 */
237 static void cert_policy_destroy(x509_cert_policy_t *this)
238 {
239 free(this->oid.ptr);
240 free(this->cps_uri);
241 free(this->unotice_text);
242 free(this);
243 }
244
245 /**
246 * Free policy mapping
247 */
248 static void policy_mapping_destroy(x509_policy_mapping_t *mapping)
249 {
250 free(mapping->issuer.ptr);
251 free(mapping->subject.ptr);
252 free(mapping);
253 }
254
255 /**
256 * Parse a length constraint from an unwrapped integer
257 */
258 static u_int parse_constraint(chunk_t object)
259 {
260 switch (object.len)
261 {
262 case 0:
263 return 0;
264 case 1:
265 return (object.ptr[0] & 0x80) ? X509_NO_CONSTRAINT : object.ptr[0];
266 default:
267 return X509_NO_CONSTRAINT;
268 }
269 }
270
271 /**
272 * ASN.1 definition of a basicConstraints extension
273 */
274 static const asn1Object_t basicConstraintsObjects[] = {
275 { 0, "basicConstraints", ASN1_SEQUENCE, ASN1_NONE }, /* 0 */
276 { 1, "CA", ASN1_BOOLEAN, ASN1_DEF|ASN1_BODY }, /* 1 */
277 { 1, "pathLenConstraint", ASN1_INTEGER, ASN1_OPT|ASN1_BODY }, /* 2 */
278 { 1, "end opt", ASN1_EOC, ASN1_END }, /* 3 */
279 { 0, "exit", ASN1_EOC, ASN1_EXIT }
280 };
281 #define BASIC_CONSTRAINTS_CA 1
282 #define BASIC_CONSTRAINTS_PATH_LEN 2
283
284 /**
285 * Extracts the basicConstraints extension
286 */
287 static void parse_basicConstraints(chunk_t blob, int level0,
288 private_x509_cert_t *this)
289 {
290 asn1_parser_t *parser;
291 chunk_t object;
292 int objectID;
293 bool isCA = FALSE;
294
295 parser = asn1_parser_create(basicConstraintsObjects, blob);
296 parser->set_top_level(parser, level0);
297
298 while (parser->iterate(parser, &objectID, &object))
299 {
300 switch (objectID)
301 {
302 case BASIC_CONSTRAINTS_CA:
303 isCA = object.len && *object.ptr;
304 DBG2(DBG_ASN, " %s", isCA ? "TRUE" : "FALSE");
305 if (isCA)
306 {
307 this->flags |= X509_CA;
308 }
309 break;
310 case BASIC_CONSTRAINTS_PATH_LEN:
311 if (isCA)
312 {
313 this->pathLenConstraint = parse_constraint(object);
314 }
315 break;
316 default:
317 break;
318 }
319 }
320 parser->destroy(parser);
321 }
322
323 /**
324 * ASN.1 definition of otherName
325 */
326 static const asn1Object_t otherNameObjects[] = {
327 {0, "type-id", ASN1_OID, ASN1_BODY }, /* 0 */
328 {0, "value", ASN1_CONTEXT_C_0, ASN1_BODY }, /* 1 */
329 {0, "exit", ASN1_EOC, ASN1_EXIT }
330 };
331 #define ON_OBJ_ID_TYPE 0
332 #define ON_OBJ_VALUE 1
333
334 /**
335 * Extracts an otherName
336 */
337 static bool parse_otherName(chunk_t *blob, int level0, id_type_t *type)
338 {
339 asn1_parser_t *parser;
340 chunk_t object;
341 int objectID;
342 int oid = OID_UNKNOWN;
343 bool success = FALSE;
344
345 parser = asn1_parser_create(otherNameObjects, *blob);
346 parser->set_top_level(parser, level0);
347
348 while (parser->iterate(parser, &objectID, &object))
349 {
350 switch (objectID)
351 {
352 case ON_OBJ_ID_TYPE:
353 oid = asn1_known_oid(object);
354 break;
355 case ON_OBJ_VALUE:
356 switch (oid)
357 {
358 case OID_XMPP_ADDR:
359 if (!asn1_parse_simple_object(&object, ASN1_UTF8STRING,
360 parser->get_level(parser)+1, "xmppAddr"))
361 {
362 goto end;
363 }
364 break;
365 case OID_USER_PRINCIPAL_NAME:
366 if (asn1_parse_simple_object(&object, ASN1_UTF8STRING,
367 parser->get_level(parser)+1, "msUPN"))
368 { /* we handle UPNs as RFC822 addr */
369 *blob = object;
370 *type = ID_RFC822_ADDR;
371 }
372 else
373 {
374 goto end;
375 }
376 break;
377 }
378 break;
379 default:
380 break;
381 }
382 }
383 success = parser->success(parser);
384
385 end:
386 parser->destroy(parser);
387 return success;
388 }
389
390 /**
391 * ASN.1 definition of generalName
392 */
393 static const asn1Object_t generalNameObjects[] = {
394 { 0, "otherName", ASN1_CONTEXT_C_0, ASN1_OPT|ASN1_BODY }, /* 0 */
395 { 0, "end choice", ASN1_EOC, ASN1_END }, /* 1 */
396 { 0, "rfc822Name", ASN1_CONTEXT_S_1, ASN1_OPT|ASN1_BODY }, /* 2 */
397 { 0, "end choice", ASN1_EOC, ASN1_END }, /* 3 */
398 { 0, "dnsName", ASN1_CONTEXT_S_2, ASN1_OPT|ASN1_BODY }, /* 4 */
399 { 0, "end choice", ASN1_EOC, ASN1_END }, /* 5 */
400 { 0, "x400Address", ASN1_CONTEXT_S_3, ASN1_OPT|ASN1_BODY }, /* 6 */
401 { 0, "end choice", ASN1_EOC, ASN1_END }, /* 7 */
402 { 0, "directoryName", ASN1_CONTEXT_C_4, ASN1_OPT|ASN1_BODY }, /* 8 */
403 { 0, "end choice", ASN1_EOC, ASN1_END }, /* 9 */
404 { 0, "ediPartyName", ASN1_CONTEXT_C_5, ASN1_OPT|ASN1_BODY }, /* 10 */
405 { 0, "end choice", ASN1_EOC, ASN1_END }, /* 11 */
406 { 0, "URI", ASN1_CONTEXT_S_6, ASN1_OPT|ASN1_BODY }, /* 12 */
407 { 0, "end choice", ASN1_EOC, ASN1_END }, /* 13 */
408 { 0, "ipAddress", ASN1_CONTEXT_S_7, ASN1_OPT|ASN1_BODY }, /* 14 */
409 { 0, "end choice", ASN1_EOC, ASN1_END }, /* 15 */
410 { 0, "registeredID", ASN1_CONTEXT_S_8, ASN1_OPT|ASN1_BODY }, /* 16 */
411 { 0, "end choice", ASN1_EOC, ASN1_END }, /* 17 */
412 { 0, "exit", ASN1_EOC, ASN1_EXIT }
413 };
414 #define GN_OBJ_OTHER_NAME 0
415 #define GN_OBJ_RFC822_NAME 2
416 #define GN_OBJ_DNS_NAME 4
417 #define GN_OBJ_X400_ADDRESS 6
418 #define GN_OBJ_DIRECTORY_NAME 8
419 #define GN_OBJ_EDI_PARTY_NAME 10
420 #define GN_OBJ_URI 12
421 #define GN_OBJ_IP_ADDRESS 14
422 #define GN_OBJ_REGISTERED_ID 16
423
424 /**
425 * Extracts a generalName
426 */
427 static identification_t *parse_generalName(chunk_t blob, int level0)
428 {
429 asn1_parser_t *parser;
430 chunk_t object;
431 int objectID ;
432
433 identification_t *gn = NULL;
434
435 parser = asn1_parser_create(generalNameObjects, blob);
436 parser->set_top_level(parser, level0);
437
438 while (parser->iterate(parser, &objectID, &object))
439 {
440 id_type_t id_type = ID_ANY;
441
442 switch (objectID)
443 {
444 case GN_OBJ_RFC822_NAME:
445 id_type = ID_RFC822_ADDR;
446 break;
447 case GN_OBJ_DNS_NAME:
448 id_type = ID_FQDN;
449 break;
450 case GN_OBJ_URI:
451 id_type = ID_DER_ASN1_GN_URI;
452 break;
453 case GN_OBJ_DIRECTORY_NAME:
454 id_type = ID_DER_ASN1_DN;
455 break;
456 case GN_OBJ_IP_ADDRESS:
457 switch (object.len)
458 {
459 case 4:
460 id_type = ID_IPV4_ADDR;
461 break;
462 case 16:
463 id_type = ID_IPV6_ADDR;
464 break;
465 default:
466 break;
467 }
468 break;
469 case GN_OBJ_OTHER_NAME:
470 if (!parse_otherName(&object, parser->get_level(parser)+1,
471 &id_type))
472 {
473 goto end;
474 }
475 break;
476 case GN_OBJ_X400_ADDRESS:
477 case GN_OBJ_EDI_PARTY_NAME:
478 case GN_OBJ_REGISTERED_ID:
479 default:
480 break;
481 }
482 if (id_type != ID_ANY)
483 {
484 gn = identification_create_from_encoding(id_type, object);
485 DBG2(DBG_ASN, " '%Y'", gn);
486 goto end;
487 }
488 }
489
490 end:
491 parser->destroy(parser);
492 return gn;
493 }
494
495 /**
496 * ASN.1 definition of generalNames
497 */
498 static const asn1Object_t generalNamesObjects[] = {
499 { 0, "generalNames", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
500 { 1, "generalName", ASN1_EOC, ASN1_RAW }, /* 1 */
501 { 0, "end loop", ASN1_EOC, ASN1_END }, /* 2 */
502 { 0, "exit", ASN1_EOC, ASN1_EXIT }
503 };
504 #define GENERAL_NAMES_GN 1
505
506 /**
507 * Extracts one or several GNs and puts them into a chained list
508 */
509 void x509_parse_generalNames(chunk_t blob, int level0, bool implicit, linked_list_t *list)
510 {
511 asn1_parser_t *parser;
512 chunk_t object;
513 int objectID;
514
515 parser = asn1_parser_create(generalNamesObjects, blob);
516 parser->set_top_level(parser, level0);
517 parser->set_flags(parser, implicit, FALSE);
518
519 while (parser->iterate(parser, &objectID, &object))
520 {
521 if (objectID == GENERAL_NAMES_GN)
522 {
523 identification_t *gn = parse_generalName(object,
524 parser->get_level(parser)+1);
525
526 if (gn)
527 {
528 list->insert_last(list, (void *)gn);
529 }
530 }
531 }
532 parser->destroy(parser);
533 }
534
535 /**
536 * ASN.1 definition of a authorityKeyIdentifier extension
537 */
538 static const asn1Object_t authKeyIdentifierObjects[] = {
539 { 0, "authorityKeyIdentifier", ASN1_SEQUENCE, ASN1_NONE }, /* 0 */
540 { 1, "keyIdentifier", ASN1_CONTEXT_S_0, ASN1_OPT|ASN1_BODY }, /* 1 */
541 { 1, "end opt", ASN1_EOC, ASN1_END }, /* 2 */
542 { 1, "authorityCertIssuer", ASN1_CONTEXT_C_1, ASN1_OPT|ASN1_OBJ }, /* 3 */
543 { 1, "end opt", ASN1_EOC, ASN1_END }, /* 4 */
544 { 1, "authorityCertSerialNumber", ASN1_CONTEXT_S_2, ASN1_OPT|ASN1_BODY }, /* 5 */
545 { 1, "end opt", ASN1_EOC, ASN1_END }, /* 6 */
546 { 0, "exit", ASN1_EOC, ASN1_EXIT }
547 };
548 #define AUTH_KEY_ID_KEY_ID 1
549 #define AUTH_KEY_ID_CERT_ISSUER 3
550 #define AUTH_KEY_ID_CERT_SERIAL 5
551
552 /**
553 * Extracts an authoritykeyIdentifier
554 */
555 chunk_t x509_parse_authorityKeyIdentifier(chunk_t blob, int level0,
556 chunk_t *authKeySerialNumber)
557 {
558 asn1_parser_t *parser;
559 chunk_t object;
560 int objectID;
561 chunk_t authKeyIdentifier = chunk_empty;
562
563 *authKeySerialNumber = chunk_empty;
564
565 parser = asn1_parser_create(authKeyIdentifierObjects, blob);
566 parser->set_top_level(parser, level0);
567
568 while (parser->iterate(parser, &objectID, &object))
569 {
570 switch (objectID)
571 {
572 case AUTH_KEY_ID_KEY_ID:
573 authKeyIdentifier = chunk_clone(object);
574 break;
575 case AUTH_KEY_ID_CERT_ISSUER:
576 /* TODO: x509_parse_generalNames(object, level+1, TRUE); */
577 break;
578 case AUTH_KEY_ID_CERT_SERIAL:
579 *authKeySerialNumber = object;
580 break;
581 default:
582 break;
583 }
584 }
585 parser->destroy(parser);
586 return authKeyIdentifier;
587 }
588
589 /**
590 * ASN.1 definition of a authorityInfoAccess extension
591 */
592 static const asn1Object_t authInfoAccessObjects[] = {
593 { 0, "authorityInfoAccess", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
594 { 1, "accessDescription", ASN1_SEQUENCE, ASN1_NONE }, /* 1 */
595 { 2, "accessMethod", ASN1_OID, ASN1_BODY }, /* 2 */
596 { 2, "accessLocation", ASN1_EOC, ASN1_RAW }, /* 3 */
597 { 0, "end loop", ASN1_EOC, ASN1_END }, /* 4 */
598 { 0, "exit", ASN1_EOC, ASN1_EXIT }
599 };
600 #define AUTH_INFO_ACCESS_METHOD 2
601 #define AUTH_INFO_ACCESS_LOCATION 3
602
603 /**
604 * Extracts an authorityInfoAcess location
605 */
606 static void parse_authorityInfoAccess(chunk_t blob, int level0,
607 private_x509_cert_t *this)
608 {
609 asn1_parser_t *parser;
610 chunk_t object;
611 int objectID;
612 int accessMethod = OID_UNKNOWN;
613
614 parser = asn1_parser_create(authInfoAccessObjects, blob);
615 parser->set_top_level(parser, level0);
616
617 while (parser->iterate(parser, &objectID, &object))
618 {
619 switch (objectID)
620 {
621 case AUTH_INFO_ACCESS_METHOD:
622 accessMethod = asn1_known_oid(object);
623 break;
624 case AUTH_INFO_ACCESS_LOCATION:
625 {
626 switch (accessMethod)
627 {
628 case OID_OCSP:
629 case OID_CA_ISSUERS:
630 {
631 identification_t *id;
632 char *uri;
633
634 id = parse_generalName(object,
635 parser->get_level(parser)+1);
636 if (id == NULL)
637 {
638 /* parsing went wrong - abort */
639 goto end;
640 }
641 DBG2(DBG_ASN, " '%Y'", id);
642 if (accessMethod == OID_OCSP &&
643 asprintf(&uri, "%Y", id) > 0)
644 {
645 this->ocsp_uris->insert_last(this->ocsp_uris, uri);
646 }
647 id->destroy(id);
648 }
649 break;
650 default:
651 /* unknown accessMethod, ignoring */
652 break;
653 }
654 break;
655 }
656 default:
657 break;
658 }
659 }
660
661 end:
662 parser->destroy(parser);
663 }
664
665 /**
666 * Extract KeyUsage flags
667 */
668 static void parse_keyUsage(chunk_t blob, private_x509_cert_t *this)
669 {
670 enum {
671 KU_DIGITAL_SIGNATURE = 0,
672 KU_NON_REPUDIATION = 1,
673 KU_KEY_ENCIPHERMENT = 2,
674 KU_DATA_ENCIPHERMENT = 3,
675 KU_KEY_AGREEMENT = 4,
676 KU_KEY_CERT_SIGN = 5,
677 KU_CRL_SIGN = 6,
678 KU_ENCIPHER_ONLY = 7,
679 KU_DECIPHER_ONLY = 8,
680 };
681
682 if (asn1_unwrap(&blob, &blob) == ASN1_BIT_STRING && blob.len)
683 {
684 int bit, byte, unused = blob.ptr[0];
685
686 blob = chunk_skip(blob, 1);
687 for (byte = 0; byte < blob.len; byte++)
688 {
689 for (bit = 0; bit < 8; bit++)
690 {
691 if (byte == blob.len - 1 && bit > (7 - unused))
692 {
693 break;
694 }
695 if (blob.ptr[byte] & 1 << (7 - bit))
696 {
697 switch (byte * 8 + bit)
698 {
699 case KU_CRL_SIGN:
700 this->flags |= X509_CRL_SIGN;
701 break;
702 case KU_KEY_CERT_SIGN:
703 /* we use the caBasicConstraint, MUST be set */
704 case KU_DIGITAL_SIGNATURE:
705 case KU_NON_REPUDIATION:
706 case KU_KEY_ENCIPHERMENT:
707 case KU_DATA_ENCIPHERMENT:
708 case KU_KEY_AGREEMENT:
709 case KU_ENCIPHER_ONLY:
710 case KU_DECIPHER_ONLY:
711 break;
712 }
713 }
714 }
715 }
716 }
717 }
718
719 /**
720 * ASN.1 definition of a extendedKeyUsage extension
721 */
722 static const asn1Object_t extendedKeyUsageObjects[] = {
723 { 0, "extendedKeyUsage", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
724 { 1, "keyPurposeID", ASN1_OID, ASN1_BODY }, /* 1 */
725 { 0, "end loop", ASN1_EOC, ASN1_END }, /* 2 */
726 { 0, "exit", ASN1_EOC, ASN1_EXIT }
727 };
728 #define EXT_KEY_USAGE_PURPOSE_ID 1
729
730 /**
731 * Extracts extendedKeyUsage OIDs
732 */
733 static void parse_extendedKeyUsage(chunk_t blob, int level0,
734 private_x509_cert_t *this)
735 {
736 asn1_parser_t *parser;
737 chunk_t object;
738 int objectID;
739
740 parser = asn1_parser_create(extendedKeyUsageObjects, blob);
741 parser->set_top_level(parser, level0);
742
743 while (parser->iterate(parser, &objectID, &object))
744 {
745 if (objectID == EXT_KEY_USAGE_PURPOSE_ID)
746 {
747 switch (asn1_known_oid(object))
748 {
749 case OID_SERVER_AUTH:
750 this->flags |= X509_SERVER_AUTH;
751 break;
752 case OID_CLIENT_AUTH:
753 this->flags |= X509_CLIENT_AUTH;
754 break;
755 case OID_OCSP_SIGNING:
756 this->flags |= X509_OCSP_SIGNER;
757 break;
758 default:
759 break;
760 }
761 }
762 }
763 parser->destroy(parser);
764 }
765
766 /**
767 * ASN.1 definition of crlDistributionPoints
768 */
769 static const asn1Object_t crlDistributionPointsObjects[] = {
770 { 0, "crlDistributionPoints", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
771 { 1, "DistributionPoint", ASN1_SEQUENCE, ASN1_NONE }, /* 1 */
772 { 2, "distributionPoint", ASN1_CONTEXT_C_0, ASN1_OPT|ASN1_LOOP }, /* 2 */
773 { 3, "fullName", ASN1_CONTEXT_C_0, ASN1_OPT|ASN1_OBJ }, /* 3 */
774 { 3, "end choice", ASN1_EOC, ASN1_END }, /* 4 */
775 { 3, "nameRelToCRLIssuer",ASN1_CONTEXT_C_1, ASN1_OPT|ASN1_BODY }, /* 5 */
776 { 3, "end choice", ASN1_EOC, ASN1_END }, /* 6 */
777 { 2, "end opt", ASN1_EOC, ASN1_END }, /* 7 */
778 { 2, "reasons", ASN1_CONTEXT_C_1, ASN1_OPT|ASN1_BODY }, /* 8 */
779 { 2, "end opt", ASN1_EOC, ASN1_END }, /* 9 */
780 { 2, "crlIssuer", ASN1_CONTEXT_C_2, ASN1_OPT|ASN1_OBJ }, /* 10 */
781 { 2, "end opt", ASN1_EOC, ASN1_END }, /* 11 */
782 { 0, "end loop", ASN1_EOC, ASN1_END }, /* 12 */
783 { 0, "exit", ASN1_EOC, ASN1_EXIT }
784 };
785 #define CRL_DIST_POINTS 1
786 #define CRL_DIST_POINTS_FULLNAME 3
787 #define CRL_DIST_POINTS_ISSUER 10
788
789 /**
790 * Add entry to the list of each pairing of URI and Issuer
791 */
792 static void add_cdps(linked_list_t *list, linked_list_t *uris,
793 linked_list_t *issuers)
794 {
795 identification_t *issuer, *id;
796 enumerator_t *enumerator;
797 x509_cdp_t *cdp;
798 char *uri;
799
800 while (uris->remove_last(uris, (void**)&id) == SUCCESS)
801 {
802 if (asprintf(&uri, "%Y", id) > 0)
803 {
804 if (issuers->get_count(issuers))
805 {
806 enumerator = issuers->create_enumerator(issuers);
807 while (enumerator->enumerate(enumerator, &issuer))
808 {
809 INIT(cdp,
810 .uri = strdup(uri),
811 .issuer = issuer->clone(issuer),
812 );
813 list->insert_last(list, cdp);
814 }
815 enumerator->destroy(enumerator);
816 free(uri);
817 }
818 else
819 {
820 INIT(cdp,
821 .uri = uri,
822 );
823 list->insert_last(list, cdp);
824 }
825 }
826 id->destroy(id);
827 }
828 while (issuers->remove_last(issuers, (void**)&id) == SUCCESS)
829 {
830 id->destroy(id);
831 }
832 }
833
834 /**
835 * Extracts one or several crlDistributionPoints into a list
836 */
837 void x509_parse_crlDistributionPoints(chunk_t blob, int level0,
838 linked_list_t *list)
839 {
840 linked_list_t *uris, *issuers;
841 asn1_parser_t *parser;
842 chunk_t object;
843 int objectID;
844
845 uris = linked_list_create();
846 issuers = linked_list_create();
847 parser = asn1_parser_create(crlDistributionPointsObjects, blob);
848 parser->set_top_level(parser, level0);
849
850 while (parser->iterate(parser, &objectID, &object))
851 {
852 switch (objectID)
853 {
854 case CRL_DIST_POINTS:
855 add_cdps(list, uris, issuers);
856 break;
857 case CRL_DIST_POINTS_FULLNAME:
858 x509_parse_generalNames(object, parser->get_level(parser) + 1,
859 TRUE, uris);
860 break;
861 case CRL_DIST_POINTS_ISSUER:
862 x509_parse_generalNames(object, parser->get_level(parser) + 1,
863 TRUE, issuers);
864 break;
865 default:
866 break;
867 }
868 }
869 parser->destroy(parser);
870
871 add_cdps(list, uris, issuers);
872
873 uris->destroy(uris);
874 issuers->destroy(issuers);
875 }
876
877 /**
878 * ASN.1 definition of nameConstraints
879 */
880 static const asn1Object_t nameConstraintsObjects[] = {
881 { 0, "nameConstraints", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
882 { 1, "permittedSubtrees", ASN1_CONTEXT_C_0, ASN1_OPT|ASN1_LOOP }, /* 1 */
883 { 2, "generalSubtree", ASN1_SEQUENCE, ASN1_BODY }, /* 2 */
884 { 1, "end loop", ASN1_EOC, ASN1_END }, /* 3 */
885 { 1, "excludedSubtrees", ASN1_CONTEXT_C_1, ASN1_OPT|ASN1_LOOP }, /* 4 */
886 { 2, "generalSubtree", ASN1_SEQUENCE, ASN1_BODY }, /* 5 */
887 { 1, "end loop", ASN1_EOC, ASN1_END }, /* 6 */
888 { 0, "end loop", ASN1_EOC, ASN1_END }, /* 7 */
889 { 0, "exit", ASN1_EOC, ASN1_EXIT }
890 };
891 #define NAME_CONSTRAINT_PERMITTED 2
892 #define NAME_CONSTRAINT_EXCLUDED 5
893
894 /**
895 * Parse permitted/excluded nameConstraints
896 */
897 static void parse_nameConstraints(chunk_t blob, int level0,
898 private_x509_cert_t *this)
899 {
900 asn1_parser_t *parser;
901 identification_t *id;
902 chunk_t object;
903 int objectID;
904
905 parser = asn1_parser_create(nameConstraintsObjects, blob);
906 parser->set_top_level(parser, level0);
907
908 while (parser->iterate(parser, &objectID, &object))
909 {
910 switch (objectID)
911 {
912 case NAME_CONSTRAINT_PERMITTED:
913 id = parse_generalName(object, parser->get_level(parser) + 1);
914 if (id)
915 {
916 this->permitted_names->insert_last(this->permitted_names, id);
917 }
918 break;
919 case NAME_CONSTRAINT_EXCLUDED:
920 id = parse_generalName(object, parser->get_level(parser) + 1);
921 if (id)
922 {
923 this->excluded_names->insert_last(this->excluded_names, id);
924 }
925 break;
926 default:
927 break;
928 }
929 }
930 parser->destroy(parser);
931 }
932
933 /**
934 * ASN.1 definition of a certificatePolicies extension
935 */
936 static const asn1Object_t certificatePoliciesObject[] = {
937 { 0, "certificatePolicies", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
938 { 1, "policyInformation", ASN1_SEQUENCE, ASN1_NONE }, /* 1 */
939 { 2, "policyId", ASN1_OID, ASN1_BODY }, /* 2 */
940 { 2, "qualifiers", ASN1_SEQUENCE, ASN1_OPT|ASN1_LOOP }, /* 3 */
941 { 3, "qualifierInfo", ASN1_SEQUENCE, ASN1_NONE }, /* 4 */
942 { 4, "qualifierId", ASN1_OID, ASN1_BODY }, /* 5 */
943 { 4, "cPSuri", ASN1_IA5STRING, ASN1_OPT|ASN1_BODY }, /* 6 */
944 { 4, "end choice", ASN1_EOC, ASN1_END }, /* 7 */
945 { 4, "userNotice", ASN1_SEQUENCE, ASN1_OPT|ASN1_BODY }, /* 8 */
946 { 5, "explicitText", ASN1_EOC, ASN1_RAW }, /* 9 */
947 { 4, "end choice", ASN1_EOC, ASN1_END }, /* 10 */
948 { 2, "end opt/loop", ASN1_EOC, ASN1_END }, /* 12 */
949 { 0, "end loop", ASN1_EOC, ASN1_END }, /* 13 */
950 { 0, "exit", ASN1_EOC, ASN1_EXIT }
951 };
952 #define CERT_POLICY_ID 2
953 #define CERT_POLICY_QUALIFIER_ID 5
954 #define CERT_POLICY_CPS_URI 6
955 #define CERT_POLICY_EXPLICIT_TEXT 9
956
957 /**
958 * Parse certificatePolicies
959 */
960 static void parse_certificatePolicies(chunk_t blob, int level0,
961 private_x509_cert_t *this)
962 {
963 x509_cert_policy_t *policy = NULL;
964 asn1_parser_t *parser;
965 chunk_t object;
966 int objectID, qualifier = OID_UNKNOWN;
967
968 parser = asn1_parser_create(certificatePoliciesObject, blob);
969 parser->set_top_level(parser, level0);
970
971 while (parser->iterate(parser, &objectID, &object))
972 {
973 switch (objectID)
974 {
975 case CERT_POLICY_ID:
976 INIT(policy,
977 .oid = chunk_clone(object),
978 );
979 this->cert_policies->insert_last(this->cert_policies, policy);
980 break;
981 case CERT_POLICY_QUALIFIER_ID:
982 qualifier = asn1_known_oid(object);
983 break;
984 case CERT_POLICY_CPS_URI:
985 if (policy && !policy->cps_uri && object.len &&
986 qualifier == OID_POLICY_QUALIFIER_CPS &&
987 chunk_printable(object, NULL, 0))
988 {
989 policy->cps_uri = strndup(object.ptr, object.len);
990 }
991 break;
992 case CERT_POLICY_EXPLICIT_TEXT:
993 /* TODO */
994 break;
995 default:
996 break;
997 }
998 }
999 parser->destroy(parser);
1000 }
1001
1002 /**
1003 * ASN.1 definition of a policyMappings extension
1004 */
1005 static const asn1Object_t policyMappingsObjects[] = {
1006 { 0, "policyMappings", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
1007 { 1, "policyMapping", ASN1_SEQUENCE, ASN1_NONE }, /* 1 */
1008 { 2, "issuerPolicy", ASN1_OID, ASN1_BODY }, /* 2 */
1009 { 2, "subjectPolicy", ASN1_OID, ASN1_BODY }, /* 3 */
1010 { 0, "end loop", ASN1_EOC, ASN1_END }, /* 4 */
1011 { 0, "exit", ASN1_EOC, ASN1_EXIT }
1012 };
1013 #define POLICY_MAPPING 1
1014 #define POLICY_MAPPING_ISSUER 2
1015 #define POLICY_MAPPING_SUBJECT 3
1016
1017 /**
1018 * Parse policyMappings
1019 */
1020 static void parse_policyMappings(chunk_t blob, int level0,
1021 private_x509_cert_t *this)
1022 {
1023 x509_policy_mapping_t *map = NULL;
1024 asn1_parser_t *parser;
1025 chunk_t object;
1026 int objectID;
1027
1028 parser = asn1_parser_create(policyMappingsObjects, blob);
1029 parser->set_top_level(parser, level0);
1030
1031 while (parser->iterate(parser, &objectID, &object))
1032 {
1033 switch (objectID)
1034 {
1035 case POLICY_MAPPING:
1036 INIT(map);
1037 this->policy_mappings->insert_last(this->policy_mappings, map);
1038 break;
1039 case POLICY_MAPPING_ISSUER:
1040 if (map && !map->issuer.len)
1041 {
1042 map->issuer = chunk_clone(object);
1043 }
1044 break;
1045 case POLICY_MAPPING_SUBJECT:
1046 if (map && !map->subject.len)
1047 {
1048 map->subject = chunk_clone(object);
1049 }
1050 break;
1051 default:
1052 break;
1053 }
1054 }
1055 parser->destroy(parser);
1056 }
1057
1058 /**
1059 * ASN.1 definition of a policyConstraints extension
1060 */
1061 static const asn1Object_t policyConstraintsObjects[] = {
1062 { 0, "policyConstraints", ASN1_SEQUENCE, ASN1_NONE }, /* 0 */
1063 { 1, "requireExplicitPolicy", ASN1_CONTEXT_C_0, ASN1_OPT|ASN1_NONE }, /* 1 */
1064 { 2, "SkipCerts", ASN1_INTEGER, ASN1_BODY }, /* 2 */
1065 { 1, "end opt", ASN1_EOC, ASN1_END }, /* 3 */
1066 { 1, "inhibitPolicyMapping", ASN1_CONTEXT_C_1, ASN1_OPT|ASN1_NONE }, /* 4 */
1067 { 2, "SkipCerts", ASN1_INTEGER, ASN1_BODY }, /* 5 */
1068 { 1, "end opt", ASN1_EOC, ASN1_END }, /* 6 */
1069 { 0, "exit", ASN1_EOC, ASN1_EXIT }
1070 };
1071 #define POLICY_CONSTRAINT_EXPLICIT 2
1072 #define POLICY_CONSTRAINT_INHIBIT 5
1073
1074 /**
1075 * Parse policyConstraints
1076 */
1077 static void parse_policyConstraints(chunk_t blob, int level0,
1078 private_x509_cert_t *this)
1079 {
1080 asn1_parser_t *parser;
1081 chunk_t object;
1082 int objectID;
1083
1084 parser = asn1_parser_create(policyConstraintsObjects, blob);
1085 parser->set_top_level(parser, level0);
1086
1087 while (parser->iterate(parser, &objectID, &object))
1088 {
1089 switch (objectID)
1090 {
1091 case POLICY_CONSTRAINT_EXPLICIT:
1092 this->require_explicit = parse_constraint(object);
1093 break;
1094 case POLICY_CONSTRAINT_INHIBIT:
1095 this->inhibit_mapping = parse_constraint(object);
1096 break;
1097 default:
1098 break;
1099 }
1100 }
1101 parser->destroy(parser);
1102 }
1103
1104 /**
1105 * ASN.1 definition of ipAddrBlocks according to RFC 3779
1106 */
1107 static const asn1Object_t ipAddrBlocksObjects[] = {
1108 { 0, "ipAddrBlocks", ASN1_SEQUENCE, ASN1_LOOP }, /* 0 */
1109 { 1, "ipAddressFamily", ASN1_SEQUENCE, ASN1_NONE }, /* 1 */
1110 { 2, "addressFamily", ASN1_OCTET_STRING, ASN1_BODY }, /* 2 */
1111 { 2, "inherit", ASN1_NULL, ASN1_OPT|ASN1_NONE }, /* 3 */
1112 { 2, "end choice", ASN1_EOC, ASN1_END }, /* 4 */
1113 { 2, "addressesOrRanges", ASN1_SEQUENCE, ASN1_OPT|ASN1_LOOP }, /* 5 */
1114 { 3, "addressPrefix", ASN1_BIT_STRING, ASN1_OPT|ASN1_BODY }, /* 6 */
1115 { 3, "end choice", ASN1_EOC, ASN1_END }, /* 7 */
1116 { 3, "addressRange", ASN1_SEQUENCE, ASN1_OPT|ASN1_NONE }, /* 8 */
1117 { 4, "min", ASN1_BIT_STRING, ASN1_BODY }, /* 9 */
1118 { 4, "max", ASN1_BIT_STRING, ASN1_BODY }, /* 10 */
1119 { 3, "end choice", ASN1_EOC, ASN1_END }, /* 11 */
1120 { 2, "end opt/loop", ASN1_EOC, ASN1_END }, /* 12 */
1121 { 0, "end loop", ASN1_EOC, ASN1_END }, /* 13 */
1122 { 0, "exit", ASN1_EOC, ASN1_EXIT }
1123 };
1124 #define IP_ADDR_BLOCKS_FAMILY 2
1125 #define IP_ADDR_BLOCKS_INHERIT 3
1126 #define IP_ADDR_BLOCKS_PREFIX 6
1127 #define IP_ADDR_BLOCKS_MIN 9
1128 #define IP_ADDR_BLOCKS_MAX 10
1129
1130 static bool check_address_object(ts_type_t ts_type, chunk_t object)
1131 {
1132 switch (ts_type)
1133 {
1134 case TS_IPV4_ADDR_RANGE:
1135 if (object.len > 5)
1136 {
1137 DBG1(DBG_ASN, "IPv4 address object is larger than 5 octets");
1138 return FALSE;
1139 }
1140 break;
1141 case TS_IPV6_ADDR_RANGE:
1142 if (object.len > 17)
1143 {
1144 DBG1(DBG_ASN, "IPv6 address object is larger than 17 octets");
1145 return FALSE;
1146 }
1147 break;
1148 default:
1149 DBG1(DBG_ASN, "unknown address family");
1150 return FALSE;
1151 }
1152 if (object.len == 0)
1153 {
1154 DBG1(DBG_ASN, "An ASN.1 bit string must contain at least the "
1155 "initial octet");
1156 return FALSE;
1157 }
1158 if (object.len == 1 && object.ptr[0] != 0)
1159 {
1160 DBG1(DBG_ASN, "An empty ASN.1 bit string must contain a zero "
1161 "initial octet");
1162 return FALSE;
1163 }
1164 if (object.ptr[0] > 7)
1165 {
1166 DBG1(DBG_ASN, "number of unused bits is too large");
1167 return FALSE;
1168 }
1169 return TRUE;
1170 }
1171
1172 static void parse_ipAddrBlocks(chunk_t blob, int level0,
1173 private_x509_cert_t *this)
1174 {
1175 asn1_parser_t *parser;
1176 chunk_t object, min_object;
1177 ts_type_t ts_type = 0;
1178 traffic_selector_t *ts;
1179 int objectID;
1180
1181 parser = asn1_parser_create(ipAddrBlocksObjects, blob);
1182 parser->set_top_level(parser, level0);
1183
1184 while (parser->iterate(parser, &objectID, &object))
1185 {
1186 switch (objectID)
1187 {
1188 case IP_ADDR_BLOCKS_FAMILY:
1189 ts_type = 0;
1190 if (object.len == 2 && object.ptr[0] == 0)
1191 {
1192 if (object.ptr[1] == 1)
1193 {
1194 ts_type = TS_IPV4_ADDR_RANGE;
1195 }
1196 else if (object.ptr[1] == 2)
1197 {
1198 ts_type = TS_IPV6_ADDR_RANGE;
1199 }
1200 else
1201 {
1202 break;
1203 }
1204 DBG2(DBG_ASN, " %N", ts_type_name, ts_type);
1205 }
1206 break;
1207 case IP_ADDR_BLOCKS_INHERIT:
1208 DBG1(DBG_ASN, "inherit choice is not supported");
1209 break;
1210 case IP_ADDR_BLOCKS_PREFIX:
1211 if (!check_address_object(ts_type, object))
1212 {
1213 goto end;
1214 }
1215 ts = traffic_selector_create_from_rfc3779_format(ts_type,
1216 object, object);
1217 DBG2(DBG_ASN, " %R", ts);
1218 this->ipAddrBlocks->insert_last(this->ipAddrBlocks, ts);
1219 break;
1220 case IP_ADDR_BLOCKS_MIN:
1221 if (!check_address_object(ts_type, object))
1222 {
1223 goto end;
1224 }
1225 min_object = object;
1226 break;
1227 case IP_ADDR_BLOCKS_MAX:
1228 if (!check_address_object(ts_type, object))
1229 {
1230 goto end;
1231 }
1232 ts = traffic_selector_create_from_rfc3779_format(ts_type,
1233 min_object, object);
1234 DBG2(DBG_ASN, " %R", ts);
1235 this->ipAddrBlocks->insert_last(this->ipAddrBlocks, ts);
1236 break;
1237 default:
1238 break;
1239 }
1240 }
1241 this->flags |= X509_IP_ADDR_BLOCKS;
1242
1243 end:
1244 parser->destroy(parser);
1245 }
1246
1247 /**
1248 * ASN.1 definition of an X.509v3 x509_cert
1249 */
1250 static const asn1Object_t certObjects[] = {
1251 { 0, "x509", ASN1_SEQUENCE, ASN1_OBJ }, /* 0 */
1252 { 1, "tbsCertificate", ASN1_SEQUENCE, ASN1_OBJ }, /* 1 */
1253 { 2, "DEFAULT v1", ASN1_CONTEXT_C_0, ASN1_DEF }, /* 2 */
1254 { 3, "version", ASN1_INTEGER, ASN1_BODY }, /* 3 */
1255 { 2, "serialNumber", ASN1_INTEGER, ASN1_BODY }, /* 4 */
1256 { 2, "signature", ASN1_EOC, ASN1_RAW }, /* 5 */
1257 { 2, "issuer", ASN1_SEQUENCE, ASN1_OBJ }, /* 6 */
1258 { 2, "validity", ASN1_SEQUENCE, ASN1_NONE }, /* 7 */
1259 { 3, "notBefore", ASN1_EOC, ASN1_RAW }, /* 8 */
1260 { 3, "notAfter", ASN1_EOC, ASN1_RAW }, /* 9 */
1261 { 2, "subject", ASN1_SEQUENCE, ASN1_OBJ }, /* 10 */
1262 { 2, "subjectPublicKeyInfo",ASN1_SEQUENCE, ASN1_RAW }, /* 11 */
1263 { 2, "issuerUniqueID", ASN1_CONTEXT_C_1, ASN1_OPT }, /* 12 */
1264 { 2, "end opt", ASN1_EOC, ASN1_END }, /* 13 */
1265 { 2, "subjectUniqueID", ASN1_CONTEXT_C_2, ASN1_OPT }, /* 14 */
1266 { 2, "end opt", ASN1_EOC, ASN1_END }, /* 15 */
1267 { 2, "optional extensions", ASN1_CONTEXT_C_3, ASN1_OPT }, /* 16 */
1268 { 3, "extensions", ASN1_SEQUENCE, ASN1_LOOP }, /* 17 */
1269 { 4, "extension", ASN1_SEQUENCE, ASN1_NONE }, /* 18 */
1270 { 5, "extnID", ASN1_OID, ASN1_BODY }, /* 19 */
1271 { 5, "critical", ASN1_BOOLEAN, ASN1_DEF|ASN1_BODY }, /* 20 */
1272 { 5, "extnValue", ASN1_OCTET_STRING, ASN1_BODY }, /* 21 */
1273 { 3, "end loop", ASN1_EOC, ASN1_END }, /* 22 */
1274 { 2, "end opt", ASN1_EOC, ASN1_END }, /* 23 */
1275 { 1, "signatureAlgorithm", ASN1_EOC, ASN1_RAW }, /* 24 */
1276 { 1, "signatureValue", ASN1_BIT_STRING, ASN1_BODY }, /* 25 */
1277 { 0, "exit", ASN1_EOC, ASN1_EXIT }
1278 };
1279 #define X509_OBJ_TBS_CERTIFICATE 1
1280 #define X509_OBJ_VERSION 3
1281 #define X509_OBJ_SERIAL_NUMBER 4
1282 #define X509_OBJ_SIG_ALG 5
1283 #define X509_OBJ_ISSUER 6
1284 #define X509_OBJ_NOT_BEFORE 8
1285 #define X509_OBJ_NOT_AFTER 9
1286 #define X509_OBJ_SUBJECT 10
1287 #define X509_OBJ_SUBJECT_PUBLIC_KEY_INFO 11
1288 #define X509_OBJ_OPTIONAL_EXTENSIONS 16
1289 #define X509_OBJ_EXTN_ID 19
1290 #define X509_OBJ_CRITICAL 20
1291 #define X509_OBJ_EXTN_VALUE 21
1292 #define X509_OBJ_ALGORITHM 24
1293 #define X509_OBJ_SIGNATURE 25
1294
1295 /**
1296 * Parses an X.509v3 certificate
1297 */
1298 static bool parse_certificate(private_x509_cert_t *this)
1299 {
1300 asn1_parser_t *parser;
1301 chunk_t object;
1302 int objectID;
1303 int extn_oid = OID_UNKNOWN;
1304 int sig_alg = OID_UNKNOWN;
1305 bool success = FALSE;
1306 bool critical = FALSE;
1307
1308 parser = asn1_parser_create(certObjects, this->encoding);
1309
1310 while (parser->iterate(parser, &objectID, &object))
1311 {
1312 u_int level = parser->get_level(parser)+1;
1313
1314 switch (objectID)
1315 {
1316 case X509_OBJ_TBS_CERTIFICATE:
1317 this->tbsCertificate = object;
1318 break;
1319 case X509_OBJ_VERSION:
1320 this->version = (object.len) ? (1+(u_int)*object.ptr) : 1;
1321 if (this->version < 1 || this->version > 3)
1322 {
1323 DBG1(DBG_ASN, "X.509v%d not supported", this->version);
1324 goto end;
1325 }
1326 else
1327 {
1328 DBG2(DBG_ASN, " X.509v%d", this->version);
1329 }
1330 break;
1331 case X509_OBJ_SERIAL_NUMBER:
1332 this->serialNumber = object;
1333 break;
1334 case X509_OBJ_SIG_ALG:
1335 sig_alg = asn1_parse_algorithmIdentifier(object, level, NULL);
1336 break;
1337 case X509_OBJ_ISSUER:
1338 this->issuer = identification_create_from_encoding(ID_DER_ASN1_DN, object);
1339 DBG2(DBG_ASN, " '%Y'", this->issuer);
1340 break;
1341 case X509_OBJ_NOT_BEFORE:
1342 this->notBefore = asn1_parse_time(object, level);
1343 break;
1344 case X509_OBJ_NOT_AFTER:
1345 this->notAfter = asn1_parse_time(object, level);
1346 break;
1347 case X509_OBJ_SUBJECT:
1348 this->subject = identification_create_from_encoding(ID_DER_ASN1_DN, object);
1349 DBG2(DBG_ASN, " '%Y'", this->subject);
1350 break;
1351 case X509_OBJ_SUBJECT_PUBLIC_KEY_INFO:
1352 DBG2(DBG_ASN, "-- > --");
1353 this->public_key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY,
1354 KEY_ANY, BUILD_BLOB_ASN1_DER, object, BUILD_END);
1355 DBG2(DBG_ASN, "-- < --");
1356 if (this->public_key == NULL)
1357 {
1358 goto end;
1359 }
1360 break;
1361 case X509_OBJ_OPTIONAL_EXTENSIONS:
1362 if (this->version != 3)
1363 {
1364 DBG1(DBG_ASN, "Only X.509v3 certificates have extensions");
1365 goto end;
1366 }
1367 break;
1368 case X509_OBJ_EXTN_ID:
1369 extn_oid = asn1_known_oid(object);
1370 break;
1371 case X509_OBJ_CRITICAL:
1372 critical = object.len && *object.ptr;
1373 DBG2(DBG_ASN, " %s", critical ? "TRUE" : "FALSE");
1374 break;
1375 case X509_OBJ_EXTN_VALUE:
1376 {
1377 switch (extn_oid)
1378 {
1379 case OID_SUBJECT_KEY_ID:
1380 if (!asn1_parse_simple_object(&object, ASN1_OCTET_STRING,
1381 level, "keyIdentifier"))
1382 {
1383 goto end;
1384 }
1385 this->subjectKeyIdentifier = object;
1386 break;
1387 case OID_SUBJECT_ALT_NAME:
1388 x509_parse_generalNames(object, level, FALSE,
1389 this->subjectAltNames);
1390 break;
1391 case OID_BASIC_CONSTRAINTS:
1392 parse_basicConstraints(object, level, this);
1393 break;
1394 case OID_CRL_DISTRIBUTION_POINTS:
1395 x509_parse_crlDistributionPoints(object, level,
1396 this->crl_uris);
1397 break;
1398 case OID_AUTHORITY_KEY_ID:
1399 this->authKeyIdentifier = x509_parse_authorityKeyIdentifier(object,
1400 level, &this->authKeySerialNumber);
1401 break;
1402 case OID_AUTHORITY_INFO_ACCESS:
1403 parse_authorityInfoAccess(object, level, this);
1404 break;
1405 case OID_KEY_USAGE:
1406 parse_keyUsage(object, this);
1407 break;
1408 case OID_EXTENDED_KEY_USAGE:
1409 parse_extendedKeyUsage(object, level, this);
1410 break;
1411 case OID_IP_ADDR_BLOCKS:
1412 parse_ipAddrBlocks(object, level, this);
1413 break;
1414 case OID_NAME_CONSTRAINTS:
1415 parse_nameConstraints(object, level, this);
1416 break;
1417 case OID_CERTIFICATE_POLICIES:
1418 parse_certificatePolicies(object, level, this);
1419 break;
1420 case OID_POLICY_MAPPINGS:
1421 parse_policyMappings(object, level, this);
1422 break;
1423 case OID_POLICY_CONSTRAINTS:
1424 parse_policyConstraints(object, level, this);
1425 break;
1426 case OID_INHIBIT_ANY_POLICY:
1427 if (!asn1_parse_simple_object(&object, ASN1_INTEGER,
1428 level, "inhibitAnyPolicy"))
1429 {
1430 goto end;
1431 }
1432 this->inhibit_any = parse_constraint(object);
1433 break;
1434 case OID_NS_REVOCATION_URL:
1435 case OID_NS_CA_REVOCATION_URL:
1436 case OID_NS_CA_POLICY_URL:
1437 case OID_NS_COMMENT:
1438 if (!asn1_parse_simple_object(&object, ASN1_IA5STRING,
1439 level, oid_names[extn_oid].name))
1440 {
1441 goto end;
1442 }
1443 break;
1444 default:
1445 if (critical && lib->settings->get_bool(lib->settings,
1446 "libstrongswan.x509.enforce_critical", TRUE))
1447 {
1448 DBG1(DBG_ASN, "critical '%s' extension not supported",
1449 (extn_oid == OID_UNKNOWN) ? "unknown" :
1450 (char*)oid_names[extn_oid].name);
1451 goto end;
1452 }
1453 break;
1454 }
1455 break;
1456 }
1457 case X509_OBJ_ALGORITHM:
1458 this->algorithm = asn1_parse_algorithmIdentifier(object, level, NULL);
1459 if (this->algorithm != sig_alg)
1460 {
1461 DBG1(DBG_ASN, " signature algorithms do not agree");
1462 goto end;
1463 }
1464 break;
1465 case X509_OBJ_SIGNATURE:
1466 this->signature = object;
1467 break;
1468 default:
1469 break;
1470 }
1471 }
1472 success = parser->success(parser);
1473
1474 end:
1475 parser->destroy(parser);
1476 if (success)
1477 {
1478 hasher_t *hasher;
1479
1480 /* check if the certificate is self-signed */
1481 if (this->public.interface.interface.issued_by(
1482 &this->public.interface.interface,
1483 &this->public.interface.interface))
1484 {
1485 this->flags |= X509_SELF_SIGNED;
1486 }
1487 /* create certificate hash */
1488 hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
1489 if (hasher == NULL)
1490 {
1491 DBG1(DBG_ASN, " unable to create hash of certificate, SHA1 not supported");
1492 return NULL;
1493 }
1494 hasher->allocate_hash(hasher, this->encoding, &this->encoding_hash);
1495 hasher->destroy(hasher);
1496 }
1497 return success;
1498 }
1499
1500 METHOD(certificate_t, get_type, certificate_type_t,
1501 private_x509_cert_t *this)
1502 {
1503 return CERT_X509;
1504 }
1505
1506 METHOD(certificate_t, get_subject, identification_t*,
1507 private_x509_cert_t *this)
1508 {
1509 return this->subject;
1510 }
1511
1512 METHOD(certificate_t, get_issuer, identification_t*,
1513 private_x509_cert_t *this)
1514 {
1515 return this->issuer;
1516 }
1517
1518 METHOD(certificate_t, has_subject, id_match_t,
1519 private_x509_cert_t *this, identification_t *subject)
1520 {
1521 identification_t *current;
1522 enumerator_t *enumerator;
1523 id_match_t match, best;
1524 chunk_t encoding;
1525
1526 if (subject->get_type(subject) == ID_KEY_ID)
1527 {
1528 encoding = subject->get_encoding(subject);
1529
1530 if (this->encoding_hash.len &&
1531 chunk_equals(this->encoding_hash, encoding))
1532 {
1533 return ID_MATCH_PERFECT;
1534 }
1535 if (this->subjectKeyIdentifier.len &&
1536 chunk_equals(this->subjectKeyIdentifier, encoding))
1537 {
1538 return ID_MATCH_PERFECT;
1539 }
1540 if (this->public_key &&
1541 this->public_key->has_fingerprint(this->public_key, encoding))
1542 {
1543 return ID_MATCH_PERFECT;
1544 }
1545 }
1546 best = this->subject->matches(this->subject, subject);
1547 enumerator = this->subjectAltNames->create_enumerator(this->subjectAltNames);
1548 while (enumerator->enumerate(enumerator, &current))
1549 {
1550 match = current->matches(current, subject);
1551 if (match > best)
1552 {
1553 best = match;
1554 }
1555 }
1556 enumerator->destroy(enumerator);
1557 return best;
1558 }
1559
1560 METHOD(certificate_t, has_issuer, id_match_t,
1561 private_x509_cert_t *this, identification_t *issuer)
1562 {
1563 /* issuerAltNames currently not supported */
1564 return this->issuer->matches(this->issuer, issuer);
1565 }
1566
1567 METHOD(certificate_t, issued_by, bool,
1568 private_x509_cert_t *this, certificate_t *issuer)
1569 {
1570 public_key_t *key;
1571 signature_scheme_t scheme;
1572 bool valid;
1573 x509_t *x509 = (x509_t*)issuer;
1574
1575 if (&this->public.interface.interface == issuer)
1576 {
1577 if (this->flags & X509_SELF_SIGNED)
1578 {
1579 return TRUE;
1580 }
1581 }
1582 else
1583 {
1584 if (issuer->get_type(issuer) != CERT_X509)
1585 {
1586 return FALSE;
1587 }
1588 if (!(x509->get_flags(x509) & X509_CA))
1589 {
1590 return FALSE;
1591 }
1592 }
1593 if (!this->issuer->equals(this->issuer, issuer->get_subject(issuer)))
1594 {
1595 return FALSE;
1596 }
1597
1598 /* determine signature scheme */
1599 scheme = signature_scheme_from_oid(this->algorithm);
1600 if (scheme == SIGN_UNKNOWN)
1601 {
1602 return FALSE;
1603 }
1604 /* get the public key of the issuer */
1605 key = issuer->get_public_key(issuer);
1606 if (!key)
1607 {
1608 return FALSE;
1609 }
1610 valid = key->verify(key, scheme, this->tbsCertificate, this->signature);
1611 key->destroy(key);
1612 return valid;
1613 }
1614
1615 METHOD(certificate_t, get_public_key, public_key_t*,
1616 private_x509_cert_t *this)
1617 {
1618 this->public_key->get_ref(this->public_key);
1619 return this->public_key;
1620 }
1621
1622 METHOD(certificate_t, get_ref, certificate_t*,
1623 private_x509_cert_t *this)
1624 {
1625 ref_get(&this->ref);
1626 return &this->public.interface.interface;
1627 }
1628
1629 METHOD(certificate_t, get_validity, bool,
1630 private_x509_cert_t *this, time_t *when, time_t *not_before,
1631 time_t *not_after)
1632 {
1633 time_t t = when ? *when : time(NULL);
1634
1635 if (not_before)
1636 {
1637 *not_before = this->notBefore;
1638 }
1639 if (not_after)
1640 {
1641 *not_after = this->notAfter;
1642 }
1643 return (t >= this->notBefore && t <= this->notAfter);
1644 }
1645
1646 METHOD(certificate_t, get_encoding, bool,
1647 private_x509_cert_t *this, cred_encoding_type_t type, chunk_t *encoding)
1648 {
1649 if (type == CERT_ASN1_DER)
1650 {
1651 *encoding = chunk_clone(this->encoding);
1652 return TRUE;
1653 }
1654 return lib->encoding->encode(lib->encoding, type, NULL, encoding,
1655 CRED_PART_X509_ASN1_DER, this->encoding, CRED_PART_END);
1656 }
1657
1658 METHOD(certificate_t, equals, bool,
1659 private_x509_cert_t *this, certificate_t *other)
1660 {
1661 chunk_t encoding;
1662 bool equal;
1663
1664 if (this == (private_x509_cert_t*)other)
1665 {
1666 return TRUE;
1667 }
1668 if (other->get_type(other) != CERT_X509)
1669 {
1670 return FALSE;
1671 }
1672 if (other->equals == (void*)equals)
1673 { /* skip allocation if we have the same implementation */
1674 return chunk_equals(this->encoding, ((private_x509_cert_t*)other)->encoding);
1675 }
1676 if (!other->get_encoding(other, CERT_ASN1_DER, &encoding))
1677 {
1678 return FALSE;
1679 }
1680 equal = chunk_equals(this->encoding, encoding);
1681 free(encoding.ptr);
1682 return equal;
1683 }
1684
1685 METHOD(x509_t, get_flags, x509_flag_t,
1686 private_x509_cert_t *this)
1687 {
1688 return this->flags;
1689 }
1690
1691 METHOD(x509_t, get_serial, chunk_t,
1692 private_x509_cert_t *this)
1693 {
1694 return this->serialNumber;
1695 }
1696
1697 METHOD(x509_t, get_subjectKeyIdentifier, chunk_t,
1698 private_x509_cert_t *this)
1699 {
1700 if (this->subjectKeyIdentifier.ptr)
1701 {
1702 return this->subjectKeyIdentifier;
1703 }
1704 else
1705 {
1706 chunk_t fingerprint;
1707
1708 if (this->public_key->get_fingerprint(this->public_key,
1709 KEYID_PUBKEY_SHA1, &fingerprint))
1710 {
1711 return fingerprint;
1712 }
1713 else
1714 {
1715 return chunk_empty;
1716 }
1717 }
1718 }
1719
1720 METHOD(x509_t, get_authKeyIdentifier, chunk_t,
1721 private_x509_cert_t *this)
1722 {
1723 return this->authKeyIdentifier;
1724 }
1725
1726 METHOD(x509_t, get_constraint, u_int,
1727 private_x509_cert_t *this, x509_constraint_t type)
1728 {
1729 switch (type)
1730 {
1731 case X509_PATH_LEN:
1732 return this->pathLenConstraint;
1733 case X509_REQUIRE_EXPLICIT_POLICY:
1734 return this->require_explicit;
1735 case X509_INHIBIT_POLICY_MAPPING:
1736 return this->inhibit_mapping;
1737 case X509_INHIBIT_ANY_POLICY:
1738 return this->inhibit_any;
1739 default:
1740 return X509_NO_CONSTRAINT;
1741 }
1742 }
1743
1744 METHOD(x509_t, create_subjectAltName_enumerator, enumerator_t*,
1745 private_x509_cert_t *this)
1746 {
1747 return this->subjectAltNames->create_enumerator(this->subjectAltNames);
1748 }
1749
1750 METHOD(x509_t, create_ocsp_uri_enumerator, enumerator_t*,
1751 private_x509_cert_t *this)
1752 {
1753 return this->ocsp_uris->create_enumerator(this->ocsp_uris);
1754 }
1755
1756 METHOD(x509_t, create_crl_uri_enumerator, enumerator_t*,
1757 private_x509_cert_t *this)
1758 {
1759 return this->crl_uris->create_enumerator(this->crl_uris);
1760 }
1761
1762 METHOD(x509_t, create_ipAddrBlock_enumerator, enumerator_t*,
1763 private_x509_cert_t *this)
1764 {
1765 return this->ipAddrBlocks->create_enumerator(this->ipAddrBlocks);
1766 }
1767
1768 METHOD(x509_t, create_name_constraint_enumerator, enumerator_t*,
1769 private_x509_cert_t *this, bool perm)
1770 {
1771 if (perm)
1772 {
1773 return this->permitted_names->create_enumerator(this->permitted_names);
1774 }
1775 return this->excluded_names->create_enumerator(this->excluded_names);
1776 }
1777
1778 METHOD(x509_t, create_cert_policy_enumerator, enumerator_t*,
1779 private_x509_cert_t *this)
1780 {
1781 return this->cert_policies->create_enumerator(this->cert_policies);
1782 }
1783
1784 METHOD(x509_t, create_policy_mapping_enumerator, enumerator_t*,
1785 private_x509_cert_t *this)
1786 {
1787 return this->policy_mappings->create_enumerator(this->policy_mappings);
1788 }
1789
1790 METHOD(certificate_t, destroy, void,
1791 private_x509_cert_t *this)
1792 {
1793 if (ref_put(&this->ref))
1794 {
1795 this->subjectAltNames->destroy_offset(this->subjectAltNames,
1796 offsetof(identification_t, destroy));
1797 this->crl_uris->destroy_function(this->crl_uris, (void*)crl_uri_destroy);
1798 this->ocsp_uris->destroy_function(this->ocsp_uris, free);
1799 this->ipAddrBlocks->destroy_offset(this->ipAddrBlocks,
1800 offsetof(traffic_selector_t, destroy));
1801 this->permitted_names->destroy_offset(this->permitted_names,
1802 offsetof(identification_t, destroy));
1803 this->excluded_names->destroy_offset(this->excluded_names,
1804 offsetof(identification_t, destroy));
1805 this->cert_policies->destroy_function(this->cert_policies,
1806 (void*)cert_policy_destroy);
1807 this->policy_mappings->destroy_function(this->policy_mappings,
1808 (void*)policy_mapping_destroy);
1809 DESTROY_IF(this->issuer);
1810 DESTROY_IF(this->subject);
1811 DESTROY_IF(this->public_key);
1812 chunk_free(&this->authKeyIdentifier);
1813 chunk_free(&this->encoding);
1814 chunk_free(&this->encoding_hash);
1815 if (!this->parsed)
1816 { /* only parsed certificates point these fields to "encoded" */
1817 chunk_free(&this->signature);
1818 chunk_free(&this->serialNumber);
1819 chunk_free(&this->tbsCertificate);
1820 }
1821 free(this);
1822 }
1823 }
1824
1825 /**
1826 * create an empty but initialized X.509 certificate
1827 */
1828 static private_x509_cert_t* create_empty(void)
1829 {
1830 private_x509_cert_t *this;
1831
1832 INIT(this,
1833 .public = {
1834 .interface = {
1835 .interface = {
1836 .get_type = _get_type,
1837 .get_subject = _get_subject,
1838 .get_issuer = _get_issuer,
1839 .has_subject = _has_subject,
1840 .has_issuer = _has_issuer,
1841 .issued_by = _issued_by,
1842 .get_public_key = _get_public_key,
1843 .get_validity = _get_validity,
1844 .get_encoding = _get_encoding,
1845 .equals = _equals,
1846 .get_ref = _get_ref,
1847 .destroy = _destroy,
1848 },
1849 .get_flags = _get_flags,
1850 .get_serial = _get_serial,
1851 .get_subjectKeyIdentifier = _get_subjectKeyIdentifier,
1852 .get_authKeyIdentifier = _get_authKeyIdentifier,
1853 .get_constraint = _get_constraint,
1854 .create_subjectAltName_enumerator = _create_subjectAltName_enumerator,
1855 .create_crl_uri_enumerator = _create_crl_uri_enumerator,
1856 .create_ocsp_uri_enumerator = _create_ocsp_uri_enumerator,
1857 .create_ipAddrBlock_enumerator = _create_ipAddrBlock_enumerator,
1858 .create_name_constraint_enumerator = _create_name_constraint_enumerator,
1859 .create_cert_policy_enumerator = _create_cert_policy_enumerator,
1860 .create_policy_mapping_enumerator = _create_policy_mapping_enumerator,
1861 },
1862 },
1863 .version = 1,
1864 .subjectAltNames = linked_list_create(),
1865 .crl_uris = linked_list_create(),
1866 .ocsp_uris = linked_list_create(),
1867 .ipAddrBlocks = linked_list_create(),
1868 .permitted_names = linked_list_create(),
1869 .excluded_names = linked_list_create(),
1870 .cert_policies = linked_list_create(),
1871 .policy_mappings = linked_list_create(),
1872 .pathLenConstraint = X509_NO_CONSTRAINT,
1873 .require_explicit = X509_NO_CONSTRAINT,
1874 .inhibit_mapping = X509_NO_CONSTRAINT,
1875 .inhibit_any = X509_NO_CONSTRAINT,
1876 .ref = 1,
1877 );
1878 return this;
1879 }
1880
1881 /**
1882 * Build a generalName from an id
1883 */
1884 chunk_t build_generalName(identification_t *id)
1885 {
1886 int context;
1887
1888 switch (id->get_type(id))
1889 {
1890 case ID_RFC822_ADDR:
1891 context = ASN1_CONTEXT_S_1;
1892 break;
1893 case ID_FQDN:
1894 context = ASN1_CONTEXT_S_2;
1895 break;
1896 case ID_DER_ASN1_DN:
1897 context = ASN1_CONTEXT_C_4;
1898 break;
1899 case ID_IPV4_ADDR:
1900 case ID_IPV6_ADDR:
1901 context = ASN1_CONTEXT_S_7;
1902 break;
1903 default:
1904 DBG1(DBG_ASN, "encoding %N as generalName not supported",
1905 id_type_names, id->get_type(id));
1906 return chunk_empty;
1907 }
1908 return asn1_wrap(context, "c", id->get_encoding(id));
1909 }
1910
1911 /**
1912 * Encode a linked list of subjectAltNames
1913 */
1914 chunk_t x509_build_subjectAltNames(linked_list_t *list)
1915 {
1916 chunk_t subjectAltNames = chunk_empty, name;
1917 enumerator_t *enumerator;
1918 identification_t *id;
1919
1920 if (list->get_count(list) == 0)
1921 {
1922 return chunk_empty;
1923 }
1924
1925 enumerator = list->create_enumerator(list);
1926 while (enumerator->enumerate(enumerator, &id))
1927 {
1928 name = build_generalName(id);
1929 subjectAltNames = chunk_cat("mm", subjectAltNames, name);
1930 }
1931 enumerator->destroy(enumerator);
1932
1933 return asn1_wrap(ASN1_SEQUENCE, "mm",
1934 asn1_build_known_oid(OID_SUBJECT_ALT_NAME),
1935 asn1_wrap(ASN1_OCTET_STRING, "m",
1936 asn1_wrap(ASN1_SEQUENCE, "m", subjectAltNames)
1937 )
1938 );
1939 }
1940
1941 /**
1942 * Encode CRL distribution points extension from a x509_cdp_t list
1943 */
1944 chunk_t x509_build_crlDistributionPoints(linked_list_t *list, int extn)
1945 {
1946 chunk_t crlDistributionPoints = chunk_empty;
1947 enumerator_t *enumerator;
1948 x509_cdp_t *cdp;
1949
1950 if (list->get_count(list) == 0)
1951 {
1952 return chunk_empty;
1953 }
1954
1955 enumerator = list->create_enumerator(list);
1956 while (enumerator->enumerate(enumerator, &cdp))
1957 {
1958 chunk_t distributionPoint, crlIssuer = chunk_empty;
1959
1960 if (cdp->issuer)
1961 {
1962 crlIssuer = asn1_wrap(ASN1_CONTEXT_C_2, "m",
1963 build_generalName(cdp->issuer));
1964 }
1965 distributionPoint = asn1_wrap(ASN1_SEQUENCE, "mm",
1966 asn1_wrap(ASN1_CONTEXT_C_0, "m",
1967 asn1_wrap(ASN1_CONTEXT_C_0, "m",
1968 asn1_wrap(ASN1_CONTEXT_S_6, "c",
1969 chunk_create(cdp->uri, strlen(cdp->uri))))),
1970 crlIssuer);
1971 crlDistributionPoints = chunk_cat("mm", crlDistributionPoints,
1972 distributionPoint);
1973 }
1974 enumerator->destroy(enumerator);
1975
1976 return asn1_wrap(ASN1_SEQUENCE, "mm",
1977 asn1_build_known_oid(extn),
1978 asn1_wrap(ASN1_OCTET_STRING, "m",
1979 asn1_wrap(ASN1_SEQUENCE, "m", crlDistributionPoints)));
1980 }
1981
1982 /**
1983 * Generate and sign a new certificate
1984 */
1985 static bool generate(private_x509_cert_t *cert, certificate_t *sign_cert,
1986 private_key_t *sign_key, int digest_alg)
1987 {
1988 chunk_t extensions = chunk_empty, extendedKeyUsage = chunk_empty;
1989 chunk_t serverAuth = chunk_empty, clientAuth = chunk_empty;
1990 chunk_t ocspSigning = chunk_empty, certPolicies = chunk_empty;
1991 chunk_t basicConstraints = chunk_empty, nameConstraints = chunk_empty;
1992 chunk_t keyUsage = chunk_empty, keyUsageBits = chunk_empty;
1993 chunk_t subjectAltNames = chunk_empty, policyMappings = chunk_empty;
1994 chunk_t subjectKeyIdentifier = chunk_empty, authKeyIdentifier = chunk_empty;
1995 chunk_t crlDistributionPoints = chunk_empty, authorityInfoAccess = chunk_empty;
1996 chunk_t policyConstraints = chunk_empty, inhibitAnyPolicy = chunk_empty;
1997 identification_t *issuer, *subject;
1998 chunk_t key_info;
1999 signature_scheme_t scheme;
2000 hasher_t *hasher;
2001 enumerator_t *enumerator;
2002 char *uri;
2003
2004 subject = cert->subject;
2005 if (sign_cert)
2006 {
2007 issuer = sign_cert->get_subject(sign_cert);
2008 if (!cert->public_key)
2009 {
2010 return FALSE;
2011 }
2012 }
2013 else
2014 { /* self signed */
2015 issuer = subject;
2016 if (!cert->public_key)
2017 {
2018 cert->public_key = sign_key->get_public_key(sign_key);
2019 }
2020 cert->flags |= X509_SELF_SIGNED;
2021 }
2022 cert->issuer = issuer->clone(issuer);
2023 if (!cert->notBefore)
2024 {
2025 cert->notBefore = time(NULL);
2026 }
2027 if (!cert->notAfter)
2028 { /* defaults to 1 year from now */
2029 cert->notAfter = cert->notBefore + 60 * 60 * 24 * 365;
2030 }
2031
2032 /* select signature scheme */
2033 cert->algorithm = hasher_signature_algorithm_to_oid(digest_alg,
2034 sign_key->get_type(sign_key));
2035 if (cert->algorithm == OID_UNKNOWN)
2036 {
2037 return FALSE;
2038 }
2039 scheme = signature_scheme_from_oid(cert->algorithm);
2040
2041 if (!cert->public_key->get_encoding(cert->public_key,
2042 PUBKEY_SPKI_ASN1_DER, &key_info))
2043 {
2044 return FALSE;
2045 }
2046
2047 /* encode subjectAltNames */
2048 subjectAltNames = x509_build_subjectAltNames(cert->subjectAltNames);
2049
2050 crlDistributionPoints = x509_build_crlDistributionPoints(cert->crl_uris,
2051 OID_CRL_DISTRIBUTION_POINTS);
2052
2053 /* encode OCSP URIs in authorityInfoAccess extension */
2054 enumerator = cert->ocsp_uris->create_enumerator(cert->ocsp_uris);
2055 while (enumerator->enumerate(enumerator, &uri))
2056 {
2057 chunk_t accessDescription;
2058
2059 accessDescription = asn1_wrap(ASN1_SEQUENCE, "mm",
2060 asn1_build_known_oid(OID_OCSP),
2061 asn1_wrap(ASN1_CONTEXT_S_6, "c",
2062 chunk_create(uri, strlen(uri))));
2063 authorityInfoAccess = chunk_cat("mm", authorityInfoAccess,
2064 accessDescription);
2065 }
2066 enumerator->destroy(enumerator);
2067 if (authorityInfoAccess.ptr)
2068 {
2069 authorityInfoAccess = asn1_wrap(ASN1_SEQUENCE, "mm",
2070 asn1_build_known_oid(OID_AUTHORITY_INFO_ACCESS),
2071 asn1_wrap(ASN1_OCTET_STRING, "m",
2072 asn1_wrap(ASN1_SEQUENCE, "m", authorityInfoAccess)));
2073 }
2074
2075 /* build CA basicConstraint and keyUsage flags for CA certificates */
2076 if (cert->flags & X509_CA)
2077 {
2078 chunk_t pathLenConstraint = chunk_empty;
2079
2080 if (cert->pathLenConstraint != X509_NO_CONSTRAINT)
2081 {
2082 pathLenConstraint = asn1_integer("c",
2083 chunk_from_thing(cert->pathLenConstraint));
2084 }
2085 basicConstraints = asn1_wrap(ASN1_SEQUENCE, "mmm",
2086 asn1_build_known_oid(OID_BASIC_CONSTRAINTS),
2087 asn1_wrap(ASN1_BOOLEAN, "c",
2088 chunk_from_chars(0xFF)),
2089 asn1_wrap(ASN1_OCTET_STRING, "m",
2090 asn1_wrap(ASN1_SEQUENCE, "mm",
2091 asn1_wrap(ASN1_BOOLEAN, "c",
2092 chunk_from_chars(0xFF)),
2093 pathLenConstraint)));
2094 /* set CertificateSign and implicitly CRLsign */
2095 keyUsageBits = chunk_from_chars(0x01, 0x06);
2096 }
2097 else if (cert->flags & X509_CRL_SIGN)
2098 {
2099 keyUsageBits = chunk_from_chars(0x01, 0x02);
2100 }
2101 if (keyUsageBits.len)
2102 {
2103 keyUsage = asn1_wrap(ASN1_SEQUENCE, "mmm",
2104 asn1_build_known_oid(OID_KEY_USAGE),
2105 asn1_wrap(ASN1_BOOLEAN, "c", chunk_from_chars(0xFF)),
2106 asn1_wrap(ASN1_OCTET_STRING, "m",
2107 asn1_wrap(ASN1_BIT_STRING, "c", keyUsageBits)));
2108 }
2109
2110 /* add serverAuth extendedKeyUsage flag */
2111 if (cert->flags & X509_SERVER_AUTH)
2112 {
2113 serverAuth = asn1_build_known_oid(OID_SERVER_AUTH);
2114 }
2115 if (cert->flags & X509_CLIENT_AUTH)
2116 {
2117 clientAuth = asn1_build_known_oid(OID_CLIENT_AUTH);
2118 }
2119
2120 /* add ocspSigning extendedKeyUsage flag */
2121 if (cert->flags & X509_OCSP_SIGNER)
2122 {
2123 ocspSigning = asn1_build_known_oid(OID_OCSP_SIGNING);
2124 }
2125
2126 if (serverAuth.ptr || clientAuth.ptr || ocspSigning.ptr)
2127 {
2128 extendedKeyUsage = asn1_wrap(ASN1_SEQUENCE, "mm",
2129 asn1_build_known_oid(OID_EXTENDED_KEY_USAGE),
2130 asn1_wrap(ASN1_OCTET_STRING, "m",
2131 asn1_wrap(ASN1_SEQUENCE, "mmm",
2132 serverAuth, clientAuth, ocspSigning)));
2133 }
2134
2135 /* add subjectKeyIdentifier to CA and OCSP signer certificates */
2136 if (cert->flags & (X509_CA | X509_OCSP_SIGNER | X509_CRL_SIGN))
2137 {
2138 chunk_t keyid;
2139
2140 if (cert->public_key->get_fingerprint(cert->public_key,
2141 KEYID_PUBKEY_SHA1, &keyid))
2142 {
2143 subjectKeyIdentifier = asn1_wrap(ASN1_SEQUENCE, "mm",
2144 asn1_build_known_oid(OID_SUBJECT_KEY_ID),
2145 asn1_wrap(ASN1_OCTET_STRING, "m",
2146 asn1_wrap(ASN1_OCTET_STRING, "c", keyid)));
2147 }
2148 }
2149
2150 /* add the keyid authKeyIdentifier for non self-signed certificates */
2151 if (sign_key)
2152 {
2153 chunk_t keyid;
2154
2155 if (sign_key->get_fingerprint(sign_key, KEYID_PUBKEY_SHA1, &keyid))
2156 {
2157 authKeyIdentifier = asn1_wrap(ASN1_SEQUENCE, "mm",
2158 asn1_build_known_oid(OID_AUTHORITY_KEY_ID),
2159 asn1_wrap(ASN1_OCTET_STRING, "m",
2160 asn1_wrap(ASN1_SEQUENCE, "m",
2161 asn1_wrap(ASN1_CONTEXT_S_0, "c", keyid))));
2162 }
2163 }
2164
2165 if (cert->permitted_names->get_count(cert->permitted_names) ||
2166 cert->excluded_names->get_count(cert->excluded_names))
2167 {
2168 chunk_t permitted = chunk_empty, excluded = chunk_empty, subtree;
2169 identification_t *id;
2170
2171 enumerator = create_name_constraint_enumerator(cert, TRUE);
2172 while (enumerator->enumerate(enumerator, &id))
2173 {
2174 subtree = asn1_wrap(ASN1_SEQUENCE, "m", build_generalName(id));
2175 permitted = chunk_cat("mm", permitted, subtree);
2176 }
2177 enumerator->destroy(enumerator);
2178 if (permitted.ptr)
2179 {
2180 permitted = asn1_wrap(ASN1_CONTEXT_C_0, "m", permitted);
2181 }
2182
2183 enumerator = create_name_constraint_enumerator(cert, FALSE);
2184 while (enumerator->enumerate(enumerator, &id))
2185 {
2186 subtree = asn1_wrap(ASN1_SEQUENCE, "m", build_generalName(id));
2187 excluded = chunk_cat("mm", excluded, subtree);
2188 }
2189 enumerator->destroy(enumerator);
2190 if (excluded.ptr)
2191 {
2192 excluded = asn1_wrap(ASN1_CONTEXT_C_1, "m", excluded);
2193 }
2194
2195 nameConstraints = asn1_wrap(ASN1_SEQUENCE, "mm",
2196 asn1_build_known_oid(OID_NAME_CONSTRAINTS),
2197 asn1_wrap(ASN1_OCTET_STRING, "m",
2198 asn1_wrap(ASN1_SEQUENCE, "mm",
2199 permitted, excluded)));
2200 }
2201
2202 if (cert->cert_policies->get_count(cert->cert_policies))
2203 {
2204 x509_cert_policy_t *policy;
2205
2206 enumerator = create_cert_policy_enumerator(cert);
2207 while (enumerator->enumerate(enumerator, &policy))
2208 {
2209 chunk_t chunk = chunk_empty, cps = chunk_empty, notice = chunk_empty;
2210
2211 if (policy->cps_uri)
2212 {
2213 cps = asn1_wrap(ASN1_SEQUENCE, "mm",
2214 asn1_build_known_oid(OID_POLICY_QUALIFIER_CPS),
2215 asn1_wrap(ASN1_IA5STRING, "c",
2216 chunk_create(policy->cps_uri,
2217 strlen(policy->cps_uri))));
2218 }
2219 if (policy->unotice_text)
2220 {
2221 notice = asn1_wrap(ASN1_SEQUENCE, "mm",
2222 asn1_build_known_oid(OID_POLICY_QUALIFIER_UNOTICE),
2223 asn1_wrap(ASN1_SEQUENCE, "m",
2224 asn1_wrap(ASN1_VISIBLESTRING, "c",
2225 chunk_create(policy->unotice_text,
2226 strlen(policy->unotice_text)))));
2227 }
2228 if (cps.len || notice.len)
2229 {
2230 chunk = asn1_wrap(ASN1_SEQUENCE, "mm", cps, notice);
2231 }
2232 chunk = asn1_wrap(ASN1_SEQUENCE, "mm",
2233 asn1_wrap(ASN1_OID, "c", policy->oid), chunk);
2234 certPolicies = chunk_cat("mm", certPolicies, chunk);
2235 }
2236 enumerator->destroy(enumerator);
2237
2238 certPolicies = asn1_wrap(ASN1_SEQUENCE, "mm",
2239 asn1_build_known_oid(OID_CERTIFICATE_POLICIES),
2240 asn1_wrap(ASN1_OCTET_STRING, "m",
2241 asn1_wrap(ASN1_SEQUENCE, "m", certPolicies)));
2242 }
2243
2244 if (cert->policy_mappings->get_count(cert->policy_mappings))
2245 {
2246 x509_policy_mapping_t *mapping;
2247
2248 enumerator = create_policy_mapping_enumerator(cert);
2249 while (enumerator->enumerate(enumerator, &mapping))
2250 {
2251 chunk_t chunk;
2252
2253 chunk = asn1_wrap(ASN1_SEQUENCE, "mm",
2254 asn1_wrap(ASN1_OID, "c", mapping->issuer),
2255 asn1_wrap(ASN1_OID, "c", mapping->subject));
2256 policyMappings = chunk_cat("mm", policyMappings, chunk);
2257 }
2258 enumerator->destroy(enumerator);
2259
2260 policyMappings = asn1_wrap(ASN1_SEQUENCE, "mm",
2261 asn1_build_known_oid(OID_POLICY_MAPPINGS),
2262 asn1_wrap(ASN1_OCTET_STRING, "m",
2263 asn1_wrap(ASN1_SEQUENCE, "m", policyMappings)));
2264 }
2265
2266 if (cert->inhibit_mapping != X509_NO_CONSTRAINT ||
2267 cert->require_explicit != X509_NO_CONSTRAINT)
2268 {
2269 chunk_t inhibit = chunk_empty, explicit = chunk_empty;
2270
2271 if (cert->require_explicit != X509_NO_CONSTRAINT)
2272 {
2273 explicit = asn1_wrap(ASN1_CONTEXT_C_0, "m",
2274 asn1_integer("c",
2275 chunk_from_thing(cert->require_explicit)));
2276 }
2277 if (cert->inhibit_mapping != X509_NO_CONSTRAINT)
2278 {
2279 inhibit = asn1_wrap(ASN1_CONTEXT_C_1, "m",
2280 asn1_integer("c",
2281 chunk_from_thing(cert->inhibit_mapping)));
2282 }
2283 policyConstraints = asn1_wrap(ASN1_SEQUENCE, "mmm",
2284 asn1_build_known_oid(OID_POLICY_CONSTRAINTS),
2285 asn1_wrap(ASN1_BOOLEAN, "c", chunk_from_chars(0xFF)),
2286 asn1_wrap(ASN1_OCTET_STRING, "m",
2287 asn1_wrap(ASN1_SEQUENCE, "mm",
2288 explicit, inhibit)));
2289 }
2290
2291 if (cert->inhibit_any != X509_NO_CONSTRAINT)
2292 {
2293 inhibitAnyPolicy = asn1_wrap(ASN1_SEQUENCE, "mmm",
2294 asn1_build_known_oid(OID_INHIBIT_ANY_POLICY),
2295 asn1_wrap(ASN1_BOOLEAN, "c", chunk_from_chars(0xFF)),
2296 asn1_wrap(ASN1_OCTET_STRING, "m",
2297 asn1_integer("c",
2298 chunk_from_thing(cert->inhibit_any))));
2299 }
2300
2301 if (basicConstraints.ptr || subjectAltNames.ptr || authKeyIdentifier.ptr ||
2302 crlDistributionPoints.ptr || nameConstraints.ptr)
2303 {
2304 extensions = asn1_wrap(ASN1_CONTEXT_C_3, "m",
2305 asn1_wrap(ASN1_SEQUENCE, "mmmmmmmmmmmmm",
2306 basicConstraints, keyUsage, subjectKeyIdentifier,
2307 authKeyIdentifier, subjectAltNames,
2308 extendedKeyUsage, crlDistributionPoints,
2309 authorityInfoAccess, nameConstraints, certPolicies,
2310 policyMappings, policyConstraints, inhibitAnyPolicy));
2311 }
2312
2313 cert->tbsCertificate = asn1_wrap(ASN1_SEQUENCE, "mmmcmcmm",
2314 asn1_simple_object(ASN1_CONTEXT_C_0, ASN1_INTEGER_2),
2315 asn1_integer("c", cert->serialNumber),
2316 asn1_algorithmIdentifier(cert->algorithm),
2317 issuer->get_encoding(issuer),
2318 asn1_wrap(ASN1_SEQUENCE, "mm",
2319 asn1_from_time(&cert->notBefore, ASN1_UTCTIME),
2320 asn1_from_time(&cert->notAfter, ASN1_UTCTIME)),
2321 subject->get_encoding(subject),
2322 key_info, extensions);
2323
2324 if (!sign_key->sign(sign_key, scheme, cert->tbsCertificate, &cert->signature))
2325 {
2326 return FALSE;
2327 }
2328 cert->encoding = asn1_wrap(ASN1_SEQUENCE, "cmm", cert->tbsCertificate,
2329 asn1_algorithmIdentifier(cert->algorithm),
2330 asn1_bitstring("c", cert->signature));
2331
2332 hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA1);
2333 if (!hasher)
2334 {
2335 return FALSE;
2336 }
2337 hasher->allocate_hash(hasher, cert->encoding, &cert->encoding_hash);
2338 hasher->destroy(hasher);
2339 return TRUE;
2340 }
2341
2342 /**
2343 * See header.
2344 */
2345 x509_cert_t *x509_cert_load(certificate_type_t type, va_list args)
2346 {
2347 x509_flag_t flags = 0;
2348 chunk_t blob = chunk_empty;
2349
2350 while (TRUE)
2351 {
2352 switch (va_arg(args, builder_part_t))
2353 {
2354 case BUILD_BLOB_ASN1_DER:
2355 blob = va_arg(args, chunk_t);
2356 continue;
2357 case BUILD_X509_FLAG:
2358 flags |= va_arg(args, x509_flag_t);
2359 continue;
2360 case BUILD_END:
2361 break;
2362 default:
2363 return NULL;
2364 }
2365 break;
2366 }
2367
2368 if (blob.ptr)
2369 {
2370 private_x509_cert_t *cert = create_empty();
2371
2372 cert->encoding = chunk_clone(blob);
2373 cert->parsed = TRUE;
2374 if (parse_certificate(cert))
2375 {
2376 cert->flags |= flags;
2377 return &cert->public;
2378 }
2379 destroy(cert);
2380 }
2381 return NULL;
2382 }
2383
2384 /**
2385 * See header.
2386 */
2387 x509_cert_t *x509_cert_gen(certificate_type_t type, va_list args)
2388 {
2389 private_x509_cert_t *cert;
2390 certificate_t *sign_cert = NULL;
2391 private_key_t *sign_key = NULL;
2392 hash_algorithm_t digest_alg = HASH_SHA1;
2393 u_int constraint;
2394
2395 cert = create_empty();
2396 while (TRUE)
2397 {
2398 switch (va_arg(args, builder_part_t))
2399 {
2400 case BUILD_X509_FLAG:
2401 cert->flags |= va_arg(args, x509_flag_t);
2402 continue;
2403 case BUILD_SIGNING_KEY:
2404 sign_key = va_arg(args, private_key_t*);
2405 continue;
2406 case BUILD_SIGNING_CERT:
2407 sign_cert = va_arg(args, certificate_t*);
2408 continue;
2409 case BUILD_PUBLIC_KEY:
2410 cert->public_key = va_arg(args, public_key_t*);
2411 cert->public_key->get_ref(cert->public_key);
2412 continue;
2413 case BUILD_SUBJECT:
2414 cert->subject = va_arg(args, identification_t*);
2415 cert->subject = cert->subject->clone(cert->subject);
2416 continue;
2417 case BUILD_SUBJECT_ALTNAMES:
2418 {
2419 enumerator_t *enumerator;
2420 identification_t *id;
2421 linked_list_t *list;
2422
2423 list = va_arg(args, linked_list_t*);
2424 enumerator = list->create_enumerator(list);
2425 while (enumerator->enumerate(enumerator, &id))
2426 {
2427 cert->subjectAltNames->insert_last(cert->subjectAltNames,
2428 id->clone(id));
2429 }
2430 enumerator->destroy(enumerator);
2431 continue;
2432 }
2433 case BUILD_CRL_DISTRIBUTION_POINTS:
2434 {
2435 enumerator_t *enumerator;
2436 linked_list_t *list;
2437 x509_cdp_t *in, *cdp;
2438
2439 list = va_arg(args, linked_list_t*);
2440 enumerator = list->create_enumerator(list);
2441 while (enumerator->enumerate(enumerator, &in))
2442 {
2443 INIT(cdp,
2444 .uri = strdup(in->uri),
2445 .issuer = in->issuer ? in->issuer->clone(in->issuer) : NULL,
2446 );
2447 cert->crl_uris->insert_last(cert->crl_uris, cdp);
2448 }
2449 enumerator->destroy(enumerator);
2450 continue;
2451 }
2452 case BUILD_OCSP_ACCESS_LOCATIONS:
2453 {
2454 enumerator_t *enumerator;
2455 linked_list_t *list;
2456 char *uri;
2457
2458 list = va_arg(args, linked_list_t*);
2459 enumerator = list->create_enumerator(list);
2460 while (enumerator->enumerate(enumerator, &uri))
2461 {
2462 cert->ocsp_uris->insert_last(cert->ocsp_uris, strdup(uri));
2463 }
2464 enumerator->destroy(enumerator);
2465 continue;
2466 }
2467 case BUILD_PATHLEN:
2468 constraint = va_arg(args, u_int);
2469 cert->pathLenConstraint = (constraint < 128) ?
2470 constraint : X509_NO_CONSTRAINT;
2471 continue;
2472 case BUILD_PERMITTED_NAME_CONSTRAINTS:
2473 {
2474 enumerator_t *enumerator;
2475 linked_list_t *list;
2476 identification_t *constraint;
2477
2478 list = va_arg(args, linked_list_t*);
2479 enumerator = list->create_enumerator(list);
2480 while (enumerator->enumerate(enumerator, &constraint))
2481 {
2482 cert->permitted_names->insert_last(cert->permitted_names,
2483 constraint->clone(constraint));
2484 }
2485 enumerator->destroy(enumerator);
2486 continue;
2487 }
2488 case BUILD_EXCLUDED_NAME_CONSTRAINTS:
2489 {
2490 enumerator_t *enumerator;
2491 linked_list_t *list;
2492 identification_t *constraint;
2493
2494 list = va_arg(args, linked_list_t*);
2495 enumerator = list->create_enumerator(list);
2496 while (enumerator->enumerate(enumerator, &constraint))
2497 {
2498 cert->excluded_names->insert_last(cert->excluded_names,
2499 constraint->clone(constraint));
2500 }
2501 enumerator->destroy(enumerator);
2502 continue;
2503 }
2504 case BUILD_CERTIFICATE_POLICIES:
2505 {
2506 enumerator_t *enumerator;
2507 linked_list_t *list;
2508 x509_cert_policy_t *policy, *in;
2509
2510 list = va_arg(args, linked_list_t*);
2511 enumerator = list->create_enumerator(list);
2512 while (enumerator->enumerate(enumerator, &in))
2513 {
2514 INIT(policy,
2515 .oid = chunk_clone(in->oid),
2516 .cps_uri = strdupnull(in->cps_uri),
2517 .unotice_text = strdupnull(in->unotice_text),
2518 );
2519 cert->cert_policies->insert_last(cert->cert_policies, policy);
2520 }
2521 enumerator->destroy(enumerator);
2522 continue;
2523 }
2524 case BUILD_POLICY_MAPPINGS:
2525 {
2526 enumerator_t *enumerator;
2527 linked_list_t *list;
2528 x509_policy_mapping_t* mapping, *in;
2529
2530 list = va_arg(args, linked_list_t*);
2531 enumerator = list->create_enumerator(list);
2532 while (enumerator->enumerate(enumerator, &in))
2533 {
2534 INIT(mapping,
2535 .issuer = chunk_clone(in->issuer),
2536 .subject = chunk_clone(in->subject),
2537 );
2538 cert->policy_mappings->insert_last(cert->policy_mappings,
2539 mapping);
2540 }
2541 enumerator->destroy(enumerator);
2542 continue;
2543 }
2544 case BUILD_POLICY_REQUIRE_EXPLICIT:
2545 constraint = va_arg(args, u_int);
2546 cert->require_explicit = (constraint < 128) ?
2547 constraint : X509_NO_CONSTRAINT;
2548 continue;
2549 case BUILD_POLICY_INHIBIT_MAPPING:
2550 constraint = va_arg(args, u_int);
2551 cert->inhibit_mapping = (constraint < 128) ?
2552 constraint : X509_NO_CONSTRAINT;
2553 continue;
2554 case BUILD_POLICY_INHIBIT_ANY:
2555 constraint = va_arg(args, u_int);
2556 cert->inhibit_any = (constraint < 128) ?
2557 constraint : X509_NO_CONSTRAINT;
2558 continue;
2559 case BUILD_NOT_BEFORE_TIME:
2560 cert->notBefore = va_arg(args, time_t);
2561 continue;
2562 case BUILD_NOT_AFTER_TIME:
2563 cert->notAfter = va_arg(args, time_t);
2564 continue;
2565 case BUILD_SERIAL:
2566 cert->serialNumber = chunk_clone(va_arg(args, chunk_t));
2567 continue;
2568 case BUILD_DIGEST_ALG:
2569 digest_alg = va_arg(args, int);
2570 continue;
2571 case BUILD_END:
2572 break;
2573 default:
2574 destroy(cert);
2575 return NULL;
2576 }
2577 break;
2578 }
2579
2580 if (sign_key && generate(cert, sign_cert, sign_key, digest_alg))
2581 {
2582 return &cert->public;
2583 }
2584 destroy(cert);
2585 return NULL;
2586 }
2587
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