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diff --git a/src/lib/libcrypto/x509v3/v3_asid.c b/src/lib/libcrypto/x509v3/v3_asid.c
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1/*
2 * Contributed to the OpenSSL Project by the American Registry for
3 * Internet Numbers ("ARIN").
4 */
5/* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 */
57
58/*
59 * Implementation of RFC 3779 section 3.2.
60 */
61
62#include <stdio.h>
63#include <string.h>
64#include <assert.h>
65#include "cryptlib.h"
66#include <openssl/conf.h>
67#include <openssl/asn1.h>
68#include <openssl/asn1t.h>
69#include <openssl/x509v3.h>
70#include <openssl/x509.h>
71#include <openssl/bn.h>
72
73#ifndef OPENSSL_NO_RFC3779
74
75/*
76 * OpenSSL ASN.1 template translation of RFC 3779 3.2.3.
77 */
78
79ASN1_SEQUENCE(ASRange) = {
80 ASN1_SIMPLE(ASRange, min, ASN1_INTEGER),
81 ASN1_SIMPLE(ASRange, max, ASN1_INTEGER)
82} ASN1_SEQUENCE_END(ASRange)
83
84ASN1_CHOICE(ASIdOrRange) = {
85 ASN1_SIMPLE(ASIdOrRange, u.id, ASN1_INTEGER),
86 ASN1_SIMPLE(ASIdOrRange, u.range, ASRange)
87} ASN1_CHOICE_END(ASIdOrRange)
88
89ASN1_CHOICE(ASIdentifierChoice) = {
90 ASN1_SIMPLE(ASIdentifierChoice, u.inherit, ASN1_NULL),
91 ASN1_SEQUENCE_OF(ASIdentifierChoice, u.asIdsOrRanges, ASIdOrRange)
92} ASN1_CHOICE_END(ASIdentifierChoice)
93
94ASN1_SEQUENCE(ASIdentifiers) = {
95 ASN1_EXP_OPT(ASIdentifiers, asnum, ASIdentifierChoice, 0),
96 ASN1_EXP_OPT(ASIdentifiers, rdi, ASIdentifierChoice, 1)
97} ASN1_SEQUENCE_END(ASIdentifiers)
98
99IMPLEMENT_ASN1_FUNCTIONS(ASRange)
100IMPLEMENT_ASN1_FUNCTIONS(ASIdOrRange)
101IMPLEMENT_ASN1_FUNCTIONS(ASIdentifierChoice)
102IMPLEMENT_ASN1_FUNCTIONS(ASIdentifiers)
103
104/*
105 * i2r method for an ASIdentifierChoice.
106 */
107static int i2r_ASIdentifierChoice(BIO *out,
108 ASIdentifierChoice *choice,
109 int indent,
110 const char *msg)
111{
112 int i;
113 char *s;
114 if (choice == NULL)
115 return 1;
116 BIO_printf(out, "%*s%s:\n", indent, "", msg);
117 switch (choice->type) {
118 case ASIdentifierChoice_inherit:
119 BIO_printf(out, "%*sinherit\n", indent + 2, "");
120 break;
121 case ASIdentifierChoice_asIdsOrRanges:
122 for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges); i++) {
123 ASIdOrRange *aor = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
124 switch (aor->type) {
125 case ASIdOrRange_id:
126 if ((s = i2s_ASN1_INTEGER(NULL, aor->u.id)) == NULL)
127 return 0;
128 BIO_printf(out, "%*s%s\n", indent + 2, "", s);
129 OPENSSL_free(s);
130 break;
131 case ASIdOrRange_range:
132 if ((s = i2s_ASN1_INTEGER(NULL, aor->u.range->min)) == NULL)
133 return 0;
134 BIO_printf(out, "%*s%s-", indent + 2, "", s);
135 OPENSSL_free(s);
136 if ((s = i2s_ASN1_INTEGER(NULL, aor->u.range->max)) == NULL)
137 return 0;
138 BIO_printf(out, "%s\n", s);
139 OPENSSL_free(s);
140 break;
141 default:
142 return 0;
143 }
144 }
145 break;
146 default:
147 return 0;
148 }
149 return 1;
150}
151
152/*
153 * i2r method for an ASIdentifier extension.
154 */
155static int i2r_ASIdentifiers(const X509V3_EXT_METHOD *method,
156 void *ext,
157 BIO *out,
158 int indent)
159{
160 ASIdentifiers *asid = ext;
161 return (i2r_ASIdentifierChoice(out, asid->asnum, indent,
162 "Autonomous System Numbers") &&
163 i2r_ASIdentifierChoice(out, asid->rdi, indent,
164 "Routing Domain Identifiers"));
165}
166
167/*
168 * Sort comparision function for a sequence of ASIdOrRange elements.
169 */
170static int ASIdOrRange_cmp(const ASIdOrRange * const *a_,
171 const ASIdOrRange * const *b_)
172{
173 const ASIdOrRange *a = *a_, *b = *b_;
174
175 assert((a->type == ASIdOrRange_id && a->u.id != NULL) ||
176 (a->type == ASIdOrRange_range && a->u.range != NULL &&
177 a->u.range->min != NULL && a->u.range->max != NULL));
178
179 assert((b->type == ASIdOrRange_id && b->u.id != NULL) ||
180 (b->type == ASIdOrRange_range && b->u.range != NULL &&
181 b->u.range->min != NULL && b->u.range->max != NULL));
182
183 if (a->type == ASIdOrRange_id && b->type == ASIdOrRange_id)
184 return ASN1_INTEGER_cmp(a->u.id, b->u.id);
185
186 if (a->type == ASIdOrRange_range && b->type == ASIdOrRange_range) {
187 int r = ASN1_INTEGER_cmp(a->u.range->min, b->u.range->min);
188 return r != 0 ? r : ASN1_INTEGER_cmp(a->u.range->max, b->u.range->max);
189 }
190
191 if (a->type == ASIdOrRange_id)
192 return ASN1_INTEGER_cmp(a->u.id, b->u.range->min);
193 else
194 return ASN1_INTEGER_cmp(a->u.range->min, b->u.id);
195}
196
197/*
198 * Add an inherit element.
199 */
200int v3_asid_add_inherit(ASIdentifiers *asid, int which)
201{
202 ASIdentifierChoice **choice;
203 if (asid == NULL)
204 return 0;
205 switch (which) {
206 case V3_ASID_ASNUM:
207 choice = &asid->asnum;
208 break;
209 case V3_ASID_RDI:
210 choice = &asid->rdi;
211 break;
212 default:
213 return 0;
214 }
215 if (*choice == NULL) {
216 if ((*choice = ASIdentifierChoice_new()) == NULL)
217 return 0;
218 assert((*choice)->u.inherit == NULL);
219 if (((*choice)->u.inherit = ASN1_NULL_new()) == NULL)
220 return 0;
221 (*choice)->type = ASIdentifierChoice_inherit;
222 }
223 return (*choice)->type == ASIdentifierChoice_inherit;
224}
225
226/*
227 * Add an ID or range to an ASIdentifierChoice.
228 */
229int v3_asid_add_id_or_range(ASIdentifiers *asid,
230 int which,
231 ASN1_INTEGER *min,
232 ASN1_INTEGER *max)
233{
234 ASIdentifierChoice **choice;
235 ASIdOrRange *aor;
236 if (asid == NULL)
237 return 0;
238 switch (which) {
239 case V3_ASID_ASNUM:
240 choice = &asid->asnum;
241 break;
242 case V3_ASID_RDI:
243 choice = &asid->rdi;
244 break;
245 default:
246 return 0;
247 }
248 if (*choice != NULL && (*choice)->type == ASIdentifierChoice_inherit)
249 return 0;
250 if (*choice == NULL) {
251 if ((*choice = ASIdentifierChoice_new()) == NULL)
252 return 0;
253 assert((*choice)->u.asIdsOrRanges == NULL);
254 (*choice)->u.asIdsOrRanges = sk_ASIdOrRange_new(ASIdOrRange_cmp);
255 if ((*choice)->u.asIdsOrRanges == NULL)
256 return 0;
257 (*choice)->type = ASIdentifierChoice_asIdsOrRanges;
258 }
259 if ((aor = ASIdOrRange_new()) == NULL)
260 return 0;
261 if (max == NULL) {
262 aor->type = ASIdOrRange_id;
263 aor->u.id = min;
264 } else {
265 aor->type = ASIdOrRange_range;
266 if ((aor->u.range = ASRange_new()) == NULL)
267 goto err;
268 ASN1_INTEGER_free(aor->u.range->min);
269 aor->u.range->min = min;
270 ASN1_INTEGER_free(aor->u.range->max);
271 aor->u.range->max = max;
272 }
273 if (!(sk_ASIdOrRange_push((*choice)->u.asIdsOrRanges, aor)))
274 goto err;
275 return 1;
276
277 err:
278 ASIdOrRange_free(aor);
279 return 0;
280}
281
282/*
283 * Extract min and max values from an ASIdOrRange.
284 */
285static void extract_min_max(ASIdOrRange *aor,
286 ASN1_INTEGER **min,
287 ASN1_INTEGER **max)
288{
289 assert(aor != NULL && min != NULL && max != NULL);
290 switch (aor->type) {
291 case ASIdOrRange_id:
292 *min = aor->u.id;
293 *max = aor->u.id;
294 return;
295 case ASIdOrRange_range:
296 *min = aor->u.range->min;
297 *max = aor->u.range->max;
298 return;
299 }
300}
301
302/*
303 * Check whether an ASIdentifierChoice is in canonical form.
304 */
305static int ASIdentifierChoice_is_canonical(ASIdentifierChoice *choice)
306{
307 ASN1_INTEGER *a_max_plus_one = NULL;
308 BIGNUM *bn = NULL;
309 int i, ret = 0;
310
311 /*
312 * Empty element or inheritance is canonical.
313 */
314 if (choice == NULL || choice->type == ASIdentifierChoice_inherit)
315 return 1;
316
317 /*
318 * If not a list, or if empty list, it's broken.
319 */
320 if (choice->type != ASIdentifierChoice_asIdsOrRanges ||
321 sk_ASIdOrRange_num(choice->u.asIdsOrRanges) == 0)
322 return 0;
323
324 /*
325 * It's a list, check it.
326 */
327 for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; i++) {
328 ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
329 ASIdOrRange *b = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i + 1);
330 ASN1_INTEGER *a_min, *a_max, *b_min, *b_max;
331
332 extract_min_max(a, &a_min, &a_max);
333 extract_min_max(b, &b_min, &b_max);
334
335 /*
336 * Punt misordered list, overlapping start, or inverted range.
337 */
338 if (ASN1_INTEGER_cmp(a_min, b_min) >= 0 ||
339 ASN1_INTEGER_cmp(a_min, a_max) > 0 ||
340 ASN1_INTEGER_cmp(b_min, b_max) > 0)
341 goto done;
342
343 /*
344 * Calculate a_max + 1 to check for adjacency.
345 */
346 if ((bn == NULL && (bn = BN_new()) == NULL) ||
347 ASN1_INTEGER_to_BN(a_max, bn) == NULL ||
348 !BN_add_word(bn, 1) ||
349 (a_max_plus_one = BN_to_ASN1_INTEGER(bn, a_max_plus_one)) == NULL) {
350 X509V3err(X509V3_F_ASIDENTIFIERCHOICE_IS_CANONICAL,
351 ERR_R_MALLOC_FAILURE);
352 goto done;
353 }
354
355 /*
356 * Punt if adjacent or overlapping.
357 */
358 if (ASN1_INTEGER_cmp(a_max_plus_one, b_min) >= 0)
359 goto done;
360 }
361
362 ret = 1;
363
364 done:
365 ASN1_INTEGER_free(a_max_plus_one);
366 BN_free(bn);
367 return ret;
368}
369
370/*
371 * Check whether an ASIdentifier extension is in canonical form.
372 */
373int v3_asid_is_canonical(ASIdentifiers *asid)
374{
375 return (asid == NULL ||
376 (ASIdentifierChoice_is_canonical(asid->asnum) ||
377 ASIdentifierChoice_is_canonical(asid->rdi)));
378}
379
380/*
381 * Whack an ASIdentifierChoice into canonical form.
382 */
383static int ASIdentifierChoice_canonize(ASIdentifierChoice *choice)
384{
385 ASN1_INTEGER *a_max_plus_one = NULL;
386 BIGNUM *bn = NULL;
387 int i, ret = 0;
388
389 /*
390 * Nothing to do for empty element or inheritance.
391 */
392 if (choice == NULL || choice->type == ASIdentifierChoice_inherit)
393 return 1;
394
395 /*
396 * We have a list. Sort it.
397 */
398 assert(choice->type == ASIdentifierChoice_asIdsOrRanges);
399 sk_ASIdOrRange_sort(choice->u.asIdsOrRanges);
400
401 /*
402 * Now check for errors and suboptimal encoding, rejecting the
403 * former and fixing the latter.
404 */
405 for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; i++) {
406 ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
407 ASIdOrRange *b = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i + 1);
408 ASN1_INTEGER *a_min, *a_max, *b_min, *b_max;
409
410 extract_min_max(a, &a_min, &a_max);
411 extract_min_max(b, &b_min, &b_max);
412
413 /*
414 * Make sure we're properly sorted (paranoia).
415 */
416 assert(ASN1_INTEGER_cmp(a_min, b_min) <= 0);
417
418 /*
419 * Check for overlaps.
420 */
421 if (ASN1_INTEGER_cmp(a_max, b_min) >= 0) {
422 X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
423 X509V3_R_EXTENSION_VALUE_ERROR);
424 goto done;
425 }
426
427 /*
428 * Calculate a_max + 1 to check for adjacency.
429 */
430 if ((bn == NULL && (bn = BN_new()) == NULL) ||
431 ASN1_INTEGER_to_BN(a_max, bn) == NULL ||
432 !BN_add_word(bn, 1) ||
433 (a_max_plus_one = BN_to_ASN1_INTEGER(bn, a_max_plus_one)) == NULL) {
434 X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE, ERR_R_MALLOC_FAILURE);
435 goto done;
436 }
437
438 /*
439 * If a and b are adjacent, merge them.
440 */
441 if (ASN1_INTEGER_cmp(a_max_plus_one, b_min) == 0) {
442 ASRange *r;
443 switch (a->type) {
444 case ASIdOrRange_id:
445 if ((r = OPENSSL_malloc(sizeof(ASRange))) == NULL) {
446 X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
447 ERR_R_MALLOC_FAILURE);
448 goto done;
449 }
450 r->min = a_min;
451 r->max = b_max;
452 a->type = ASIdOrRange_range;
453 a->u.range = r;
454 break;
455 case ASIdOrRange_range:
456 ASN1_INTEGER_free(a->u.range->max);
457 a->u.range->max = b_max;
458 break;
459 }
460 switch (b->type) {
461 case ASIdOrRange_id:
462 b->u.id = NULL;
463 break;
464 case ASIdOrRange_range:
465 b->u.range->max = NULL;
466 break;
467 }
468 ASIdOrRange_free(b);
469 sk_ASIdOrRange_delete(choice->u.asIdsOrRanges, i + 1);
470 i--;
471 continue;
472 }
473 }
474
475 assert(ASIdentifierChoice_is_canonical(choice)); /* Paranoia */
476
477 ret = 1;
478
479 done:
480 ASN1_INTEGER_free(a_max_plus_one);
481 BN_free(bn);
482 return ret;
483}
484
485/*
486 * Whack an ASIdentifier extension into canonical form.
487 */
488int v3_asid_canonize(ASIdentifiers *asid)
489{
490 return (asid == NULL ||
491 (ASIdentifierChoice_canonize(asid->asnum) &&
492 ASIdentifierChoice_canonize(asid->rdi)));
493}
494
495/*
496 * v2i method for an ASIdentifier extension.
497 */
498static void *v2i_ASIdentifiers(const struct v3_ext_method *method,
499 struct v3_ext_ctx *ctx,
500 STACK_OF(CONF_VALUE) *values)
501{
502 ASIdentifiers *asid = NULL;
503 int i;
504
505 if ((asid = ASIdentifiers_new()) == NULL) {
506 X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
507 return NULL;
508 }
509
510 for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
511 CONF_VALUE *val = sk_CONF_VALUE_value(values, i);
512 ASN1_INTEGER *min = NULL, *max = NULL;
513 int i1, i2, i3, is_range, which;
514
515 /*
516 * Figure out whether this is an AS or an RDI.
517 */
518 if ( !name_cmp(val->name, "AS")) {
519 which = V3_ASID_ASNUM;
520 } else if (!name_cmp(val->name, "RDI")) {
521 which = V3_ASID_RDI;
522 } else {
523 X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_EXTENSION_NAME_ERROR);
524 X509V3_conf_err(val);
525 goto err;
526 }
527
528 /*
529 * Handle inheritance.
530 */
531 if (!strcmp(val->value, "inherit")) {
532 if (v3_asid_add_inherit(asid, which))
533 continue;
534 X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_INVALID_INHERITANCE);
535 X509V3_conf_err(val);
536 goto err;
537 }
538
539 /*
540 * Number, range, or mistake, pick it apart and figure out which.
541 */
542 i1 = strspn(val->value, "0123456789");
543 if (val->value[i1] == '\0') {
544 is_range = 0;
545 } else {
546 is_range = 1;
547 i2 = i1 + strspn(val->value + i1, " \t");
548 if (val->value[i2] != '-') {
549 X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_INVALID_ASNUMBER);
550 X509V3_conf_err(val);
551 goto err;
552 }
553 i2++;
554 i2 = i2 + strspn(val->value + i2, " \t");
555 i3 = i2 + strspn(val->value + i2, "0123456789");
556 if (val->value[i3] != '\0') {
557 X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_INVALID_ASRANGE);
558 X509V3_conf_err(val);
559 goto err;
560 }
561 }
562
563 /*
564 * Syntax is ok, read and add it.
565 */
566 if (!is_range) {
567 if (!X509V3_get_value_int(val, &min)) {
568 X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
569 goto err;
570 }
571 } else {
572 char *s = BUF_strdup(val->value);
573 if (s == NULL) {
574 X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
575 goto err;
576 }
577 s[i1] = '\0';
578 min = s2i_ASN1_INTEGER(NULL, s);
579 max = s2i_ASN1_INTEGER(NULL, s + i2);
580 OPENSSL_free(s);
581 if (min == NULL || max == NULL) {
582 ASN1_INTEGER_free(min);
583 ASN1_INTEGER_free(max);
584 X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
585 goto err;
586 }
587 }
588 if (!v3_asid_add_id_or_range(asid, which, min, max)) {
589 ASN1_INTEGER_free(min);
590 ASN1_INTEGER_free(max);
591 X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
592 goto err;
593 }
594 }
595
596 /*
597 * Canonize the result, then we're done.
598 */
599 if (!v3_asid_canonize(asid))
600 goto err;
601 return asid;
602
603 err:
604 ASIdentifiers_free(asid);
605 return NULL;
606}
607
608/*
609 * OpenSSL dispatch.
610 */
611const X509V3_EXT_METHOD v3_asid = {
612 NID_sbgp_autonomousSysNum, /* nid */
613 0, /* flags */
614 ASN1_ITEM_ref(ASIdentifiers), /* template */
615 0, 0, 0, 0, /* old functions, ignored */
616 0, /* i2s */
617 0, /* s2i */
618 0, /* i2v */
619 v2i_ASIdentifiers, /* v2i */
620 i2r_ASIdentifiers, /* i2r */
621 0, /* r2i */
622 NULL /* extension-specific data */
623};
624
625/*
626 * Figure out whether extension uses inheritance.
627 */
628int v3_asid_inherits(ASIdentifiers *asid)
629{
630 return (asid != NULL &&
631 ((asid->asnum != NULL &&
632 asid->asnum->type == ASIdentifierChoice_inherit) ||
633 (asid->rdi != NULL &&
634 asid->rdi->type == ASIdentifierChoice_inherit)));
635}
636
637/*
638 * Figure out whether parent contains child.
639 */
640static int asid_contains(ASIdOrRanges *parent, ASIdOrRanges *child)
641{
642 ASN1_INTEGER *p_min, *p_max, *c_min, *c_max;
643 int p, c;
644
645 if (child == NULL || parent == child)
646 return 1;
647 if (parent == NULL)
648 return 0;
649
650 p = 0;
651 for (c = 0; c < sk_ASIdOrRange_num(child); c++) {
652 extract_min_max(sk_ASIdOrRange_value(child, c), &c_min, &c_max);
653 for (;; p++) {
654 if (p >= sk_ASIdOrRange_num(parent))
655 return 0;
656 extract_min_max(sk_ASIdOrRange_value(parent, p), &p_min, &p_max);
657 if (ASN1_INTEGER_cmp(p_max, c_max) < 0)
658 continue;
659 if (ASN1_INTEGER_cmp(p_min, c_min) > 0)
660 return 0;
661 break;
662 }
663 }
664
665 return 1;
666}
667
668/*
669 * Test whether a is a subet of b.
670 */
671int v3_asid_subset(ASIdentifiers *a, ASIdentifiers *b)
672{
673 return (a == NULL ||
674 a == b ||
675 (b != NULL &&
676 !v3_asid_inherits(a) &&
677 !v3_asid_inherits(b) &&
678 asid_contains(b->asnum->u.asIdsOrRanges,
679 a->asnum->u.asIdsOrRanges) &&
680 asid_contains(b->rdi->u.asIdsOrRanges,
681 a->rdi->u.asIdsOrRanges)));
682}
683
684/*
685 * Validation error handling via callback.
686 */
687#define validation_err(_err_) \
688 do { \
689 if (ctx != NULL) { \
690 ctx->error = _err_; \
691 ctx->error_depth = i; \
692 ctx->current_cert = x; \
693 ret = ctx->verify_cb(0, ctx); \
694 } else { \
695 ret = 0; \
696 } \
697 if (!ret) \
698 goto done; \
699 } while (0)
700
701/*
702 * Core code for RFC 3779 3.3 path validation.
703 */
704static int v3_asid_validate_path_internal(X509_STORE_CTX *ctx,
705 STACK_OF(X509) *chain,
706 ASIdentifiers *ext)
707{
708 ASIdOrRanges *child_as = NULL, *child_rdi = NULL;
709 int i, ret = 1, inherit_as = 0, inherit_rdi = 0;
710 X509 *x;
711
712 assert(chain != NULL && sk_X509_num(chain) > 0);
713 assert(ctx != NULL || ext != NULL);
714 assert(ctx == NULL || ctx->verify_cb != NULL);
715
716 /*
717 * Figure out where to start. If we don't have an extension to
718 * check, we're done. Otherwise, check canonical form and
719 * set up for walking up the chain.
720 */
721 if (ext != NULL) {
722 i = -1;
723 x = NULL;
724 } else {
725 i = 0;
726 x = sk_X509_value(chain, i);
727 assert(x != NULL);
728 if ((ext = x->rfc3779_asid) == NULL)
729 goto done;
730 }
731 if (!v3_asid_is_canonical(ext))
732 validation_err(X509_V_ERR_INVALID_EXTENSION);
733 if (ext->asnum != NULL) {
734 switch (ext->asnum->type) {
735 case ASIdentifierChoice_inherit:
736 inherit_as = 1;
737 break;
738 case ASIdentifierChoice_asIdsOrRanges:
739 child_as = ext->asnum->u.asIdsOrRanges;
740 break;
741 }
742 }
743 if (ext->rdi != NULL) {
744 switch (ext->rdi->type) {
745 case ASIdentifierChoice_inherit:
746 inherit_rdi = 1;
747 break;
748 case ASIdentifierChoice_asIdsOrRanges:
749 child_rdi = ext->rdi->u.asIdsOrRanges;
750 break;
751 }
752 }
753
754 /*
755 * Now walk up the chain. Extensions must be in canonical form, no
756 * cert may list resources that its parent doesn't list.
757 */
758 for (i++; i < sk_X509_num(chain); i++) {
759 x = sk_X509_value(chain, i);
760 assert(x != NULL);
761 if (x->rfc3779_asid == NULL) {
762 if (child_as != NULL || child_rdi != NULL)
763 validation_err(X509_V_ERR_UNNESTED_RESOURCE);
764 continue;
765 }
766 if (!v3_asid_is_canonical(x->rfc3779_asid))
767 validation_err(X509_V_ERR_INVALID_EXTENSION);
768 if (x->rfc3779_asid->asnum == NULL && child_as != NULL) {
769 validation_err(X509_V_ERR_UNNESTED_RESOURCE);
770 child_as = NULL;
771 inherit_as = 0;
772 }
773 if (x->rfc3779_asid->asnum != NULL &&
774 x->rfc3779_asid->asnum->type == ASIdentifierChoice_asIdsOrRanges) {
775 if (inherit_as ||
776 asid_contains(x->rfc3779_asid->asnum->u.asIdsOrRanges, child_as)) {
777 child_as = x->rfc3779_asid->asnum->u.asIdsOrRanges;
778 inherit_as = 0;
779 } else {
780 validation_err(X509_V_ERR_UNNESTED_RESOURCE);
781 }
782 }
783 if (x->rfc3779_asid->rdi == NULL && child_rdi != NULL) {
784 validation_err(X509_V_ERR_UNNESTED_RESOURCE);
785 child_rdi = NULL;
786 inherit_rdi = 0;
787 }
788 if (x->rfc3779_asid->rdi != NULL &&
789 x->rfc3779_asid->rdi->type == ASIdentifierChoice_asIdsOrRanges) {
790 if (inherit_rdi ||
791 asid_contains(x->rfc3779_asid->rdi->u.asIdsOrRanges, child_rdi)) {
792 child_rdi = x->rfc3779_asid->rdi->u.asIdsOrRanges;
793 inherit_rdi = 0;
794 } else {
795 validation_err(X509_V_ERR_UNNESTED_RESOURCE);
796 }
797 }
798 }
799
800 /*
801 * Trust anchor can't inherit.
802 */
803 assert(x != NULL);
804 if (x->rfc3779_asid != NULL) {
805 if (x->rfc3779_asid->asnum != NULL &&
806 x->rfc3779_asid->asnum->type == ASIdentifierChoice_inherit)
807 validation_err(X509_V_ERR_UNNESTED_RESOURCE);
808 if (x->rfc3779_asid->rdi != NULL &&
809 x->rfc3779_asid->rdi->type == ASIdentifierChoice_inherit)
810 validation_err(X509_V_ERR_UNNESTED_RESOURCE);
811 }
812
813 done:
814 return ret;
815}
816
817#undef validation_err
818
819/*
820 * RFC 3779 3.3 path validation -- called from X509_verify_cert().
821 */
822int v3_asid_validate_path(X509_STORE_CTX *ctx)
823{
824 return v3_asid_validate_path_internal(ctx, ctx->chain, NULL);
825}
826
827/*
828 * RFC 3779 3.3 path validation of an extension.
829 * Test whether chain covers extension.
830 */
831int v3_asid_validate_resource_set(STACK_OF(X509) *chain,
832 ASIdentifiers *ext,
833 int allow_inheritance)
834{
835 if (ext == NULL)
836 return 1;
837 if (chain == NULL || sk_X509_num(chain) == 0)
838 return 0;
839 if (!allow_inheritance && v3_asid_inherits(ext))
840 return 0;
841 return v3_asid_validate_path_internal(NULL, chain, ext);
842}
843
844#endif /* OPENSSL_NO_RFC3779 */
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-04-26 22:29:56 +0000