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96ea4ae9 | 1 | /* |
b6461792 | 2 | * Copyright 2006-2024 The OpenSSL Project Authors. All Rights Reserved. |
96ea4ae9 | 3 | * |
4286ca47 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
d2e9e320 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
96ea4ae9 BL |
8 | */ |
9 | ||
10 | /* | |
11 | * Implementation of RFC 3779 section 3.2. | |
12 | */ | |
13 | ||
42d7d7dd | 14 | #include <assert.h> |
96ea4ae9 BL |
15 | #include <stdio.h> |
16 | #include <string.h> | |
b39fc560 | 17 | #include "internal/cryptlib.h" |
96ea4ae9 BL |
18 | #include <openssl/conf.h> |
19 | #include <openssl/asn1.h> | |
20 | #include <openssl/asn1t.h> | |
21 | #include <openssl/x509v3.h> | |
22 | #include <openssl/x509.h> | |
25f2138b | 23 | #include "crypto/x509.h" |
96ea4ae9 | 24 | #include <openssl/bn.h> |
df2ee0e2 | 25 | #include "ext_dat.h" |
c90c4693 | 26 | #include "x509_local.h" |
96ea4ae9 | 27 | |
47bbaa5b | 28 | #ifndef OPENSSL_NO_RFC3779 |
96ea4ae9 BL |
29 | |
30 | /* | |
31 | * OpenSSL ASN.1 template translation of RFC 3779 3.2.3. | |
32 | */ | |
33 | ||
34 | ASN1_SEQUENCE(ASRange) = { | |
35 | ASN1_SIMPLE(ASRange, min, ASN1_INTEGER), | |
36 | ASN1_SIMPLE(ASRange, max, ASN1_INTEGER) | |
37 | } ASN1_SEQUENCE_END(ASRange) | |
38 | ||
39 | ASN1_CHOICE(ASIdOrRange) = { | |
40 | ASN1_SIMPLE(ASIdOrRange, u.id, ASN1_INTEGER), | |
41 | ASN1_SIMPLE(ASIdOrRange, u.range, ASRange) | |
42 | } ASN1_CHOICE_END(ASIdOrRange) | |
43 | ||
44 | ASN1_CHOICE(ASIdentifierChoice) = { | |
45 | ASN1_SIMPLE(ASIdentifierChoice, u.inherit, ASN1_NULL), | |
46 | ASN1_SEQUENCE_OF(ASIdentifierChoice, u.asIdsOrRanges, ASIdOrRange) | |
47 | } ASN1_CHOICE_END(ASIdentifierChoice) | |
48 | ||
49 | ASN1_SEQUENCE(ASIdentifiers) = { | |
50 | ASN1_EXP_OPT(ASIdentifiers, asnum, ASIdentifierChoice, 0), | |
51 | ASN1_EXP_OPT(ASIdentifiers, rdi, ASIdentifierChoice, 1) | |
52 | } ASN1_SEQUENCE_END(ASIdentifiers) | |
53 | ||
54 | IMPLEMENT_ASN1_FUNCTIONS(ASRange) | |
55 | IMPLEMENT_ASN1_FUNCTIONS(ASIdOrRange) | |
56 | IMPLEMENT_ASN1_FUNCTIONS(ASIdentifierChoice) | |
57 | IMPLEMENT_ASN1_FUNCTIONS(ASIdentifiers) | |
58 | ||
59 | /* | |
60 | * i2r method for an ASIdentifierChoice. | |
61 | */ | |
62 | static int i2r_ASIdentifierChoice(BIO *out, | |
0f113f3e MC |
63 | ASIdentifierChoice *choice, |
64 | int indent, const char *msg) | |
96ea4ae9 | 65 | { |
0f113f3e MC |
66 | int i; |
67 | char *s; | |
68 | if (choice == NULL) | |
69 | return 1; | |
70 | BIO_printf(out, "%*s%s:\n", indent, "", msg); | |
71 | switch (choice->type) { | |
72 | case ASIdentifierChoice_inherit: | |
73 | BIO_printf(out, "%*sinherit\n", indent + 2, ""); | |
74 | break; | |
75 | case ASIdentifierChoice_asIdsOrRanges: | |
76 | for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges); i++) { | |
77 | ASIdOrRange *aor = | |
78 | sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i); | |
79 | switch (aor->type) { | |
80 | case ASIdOrRange_id: | |
81 | if ((s = i2s_ASN1_INTEGER(NULL, aor->u.id)) == NULL) | |
82 | return 0; | |
83 | BIO_printf(out, "%*s%s\n", indent + 2, "", s); | |
84 | OPENSSL_free(s); | |
85 | break; | |
86 | case ASIdOrRange_range: | |
87 | if ((s = i2s_ASN1_INTEGER(NULL, aor->u.range->min)) == NULL) | |
88 | return 0; | |
89 | BIO_printf(out, "%*s%s-", indent + 2, "", s); | |
90 | OPENSSL_free(s); | |
91 | if ((s = i2s_ASN1_INTEGER(NULL, aor->u.range->max)) == NULL) | |
92 | return 0; | |
93 | BIO_printf(out, "%s\n", s); | |
94 | OPENSSL_free(s); | |
95 | break; | |
96 | default: | |
97 | return 0; | |
98 | } | |
99 | } | |
100 | break; | |
101 | default: | |
102 | return 0; | |
96ea4ae9 | 103 | } |
0f113f3e | 104 | return 1; |
96ea4ae9 BL |
105 | } |
106 | ||
107 | /* | |
108 | * i2r method for an ASIdentifier extension. | |
109 | */ | |
2e6a7b3e | 110 | static int i2r_ASIdentifiers(const X509V3_EXT_METHOD *method, |
0f113f3e | 111 | void *ext, BIO *out, int indent) |
96ea4ae9 | 112 | { |
0f113f3e MC |
113 | ASIdentifiers *asid = ext; |
114 | return (i2r_ASIdentifierChoice(out, asid->asnum, indent, | |
115 | "Autonomous System Numbers") && | |
116 | i2r_ASIdentifierChoice(out, asid->rdi, indent, | |
117 | "Routing Domain Identifiers")); | |
96ea4ae9 BL |
118 | } |
119 | ||
120 | /* | |
0d4fb843 | 121 | * Sort comparison function for a sequence of ASIdOrRange elements. |
96ea4ae9 | 122 | */ |
0f113f3e MC |
123 | static int ASIdOrRange_cmp(const ASIdOrRange *const *a_, |
124 | const ASIdOrRange *const *b_) | |
96ea4ae9 | 125 | { |
0f113f3e | 126 | const ASIdOrRange *a = *a_, *b = *b_; |
96ea4ae9 | 127 | |
42d7d7dd MC |
128 | assert((a->type == ASIdOrRange_id && a->u.id != NULL) || |
129 | (a->type == ASIdOrRange_range && a->u.range != NULL && | |
130 | a->u.range->min != NULL && a->u.range->max != NULL)); | |
96ea4ae9 | 131 | |
42d7d7dd MC |
132 | assert((b->type == ASIdOrRange_id && b->u.id != NULL) || |
133 | (b->type == ASIdOrRange_range && b->u.range != NULL && | |
134 | b->u.range->min != NULL && b->u.range->max != NULL)); | |
96ea4ae9 | 135 | |
0f113f3e MC |
136 | if (a->type == ASIdOrRange_id && b->type == ASIdOrRange_id) |
137 | return ASN1_INTEGER_cmp(a->u.id, b->u.id); | |
96ea4ae9 | 138 | |
0f113f3e MC |
139 | if (a->type == ASIdOrRange_range && b->type == ASIdOrRange_range) { |
140 | int r = ASN1_INTEGER_cmp(a->u.range->min, b->u.range->min); | |
141 | return r != 0 ? r : ASN1_INTEGER_cmp(a->u.range->max, | |
142 | b->u.range->max); | |
143 | } | |
96ea4ae9 | 144 | |
0f113f3e MC |
145 | if (a->type == ASIdOrRange_id) |
146 | return ASN1_INTEGER_cmp(a->u.id, b->u.range->min); | |
147 | else | |
148 | return ASN1_INTEGER_cmp(a->u.range->min, b->u.id); | |
96ea4ae9 BL |
149 | } |
150 | ||
151 | /* | |
152 | * Add an inherit element. | |
153 | */ | |
9021a5df | 154 | int X509v3_asid_add_inherit(ASIdentifiers *asid, int which) |
96ea4ae9 | 155 | { |
0f113f3e MC |
156 | ASIdentifierChoice **choice; |
157 | if (asid == NULL) | |
158 | return 0; | |
159 | switch (which) { | |
160 | case V3_ASID_ASNUM: | |
161 | choice = &asid->asnum; | |
162 | break; | |
163 | case V3_ASID_RDI: | |
164 | choice = &asid->rdi; | |
165 | break; | |
166 | default: | |
167 | return 0; | |
168 | } | |
169 | if (*choice == NULL) { | |
170 | if ((*choice = ASIdentifierChoice_new()) == NULL) | |
171 | return 0; | |
49e9436a BE |
172 | if (((*choice)->u.inherit = ASN1_NULL_new()) == NULL) { |
173 | ASIdentifierChoice_free(*choice); | |
174 | *choice = NULL; | |
0f113f3e | 175 | return 0; |
49e9436a | 176 | } |
0f113f3e MC |
177 | (*choice)->type = ASIdentifierChoice_inherit; |
178 | } | |
179 | return (*choice)->type == ASIdentifierChoice_inherit; | |
96ea4ae9 BL |
180 | } |
181 | ||
182 | /* | |
183 | * Add an ID or range to an ASIdentifierChoice. | |
184 | */ | |
9021a5df RS |
185 | int X509v3_asid_add_id_or_range(ASIdentifiers *asid, |
186 | int which, ASN1_INTEGER *min, ASN1_INTEGER *max) | |
96ea4ae9 | 187 | { |
0f113f3e MC |
188 | ASIdentifierChoice **choice; |
189 | ASIdOrRange *aor; | |
190 | if (asid == NULL) | |
191 | return 0; | |
192 | switch (which) { | |
193 | case V3_ASID_ASNUM: | |
194 | choice = &asid->asnum; | |
195 | break; | |
196 | case V3_ASID_RDI: | |
197 | choice = &asid->rdi; | |
198 | break; | |
199 | default: | |
200 | return 0; | |
201 | } | |
49e9436a | 202 | if (*choice != NULL && (*choice)->type != ASIdentifierChoice_asIdsOrRanges) |
0f113f3e MC |
203 | return 0; |
204 | if (*choice == NULL) { | |
205 | if ((*choice = ASIdentifierChoice_new()) == NULL) | |
206 | return 0; | |
0f113f3e | 207 | (*choice)->u.asIdsOrRanges = sk_ASIdOrRange_new(ASIdOrRange_cmp); |
49e9436a BE |
208 | if ((*choice)->u.asIdsOrRanges == NULL) { |
209 | ASIdentifierChoice_free(*choice); | |
210 | *choice = NULL; | |
0f113f3e | 211 | return 0; |
49e9436a | 212 | } |
0f113f3e MC |
213 | (*choice)->type = ASIdentifierChoice_asIdsOrRanges; |
214 | } | |
215 | if ((aor = ASIdOrRange_new()) == NULL) | |
216 | return 0; | |
49e9436a BE |
217 | if (!sk_ASIdOrRange_reserve((*choice)->u.asIdsOrRanges, 1)) |
218 | goto err; | |
0f113f3e MC |
219 | if (max == NULL) { |
220 | aor->type = ASIdOrRange_id; | |
221 | aor->u.id = min; | |
222 | } else { | |
223 | aor->type = ASIdOrRange_range; | |
224 | if ((aor->u.range = ASRange_new()) == NULL) | |
225 | goto err; | |
226 | ASN1_INTEGER_free(aor->u.range->min); | |
227 | aor->u.range->min = min; | |
228 | ASN1_INTEGER_free(aor->u.range->max); | |
229 | aor->u.range->max = max; | |
230 | } | |
49e9436a BE |
231 | /* Cannot fail due to the reservation above */ |
232 | if (!ossl_assert(sk_ASIdOrRange_push((*choice)->u.asIdsOrRanges, aor))) | |
0f113f3e MC |
233 | goto err; |
234 | return 1; | |
96ea4ae9 BL |
235 | |
236 | err: | |
0f113f3e MC |
237 | ASIdOrRange_free(aor); |
238 | return 0; | |
96ea4ae9 BL |
239 | } |
240 | ||
241 | /* | |
242 | * Extract min and max values from an ASIdOrRange. | |
243 | */ | |
42d7d7dd MC |
244 | static int extract_min_max(ASIdOrRange *aor, |
245 | ASN1_INTEGER **min, ASN1_INTEGER **max) | |
96ea4ae9 | 246 | { |
638c2dd0 | 247 | if (!ossl_assert(aor != NULL)) |
42d7d7dd | 248 | return 0; |
0f113f3e MC |
249 | switch (aor->type) { |
250 | case ASIdOrRange_id: | |
251 | *min = aor->u.id; | |
252 | *max = aor->u.id; | |
42d7d7dd | 253 | return 1; |
0f113f3e MC |
254 | case ASIdOrRange_range: |
255 | *min = aor->u.range->min; | |
256 | *max = aor->u.range->max; | |
42d7d7dd | 257 | return 1; |
0f113f3e | 258 | } |
42d7d7dd MC |
259 | |
260 | return 0; | |
96ea4ae9 BL |
261 | } |
262 | ||
263 | /* | |
264 | * Check whether an ASIdentifierChoice is in canonical form. | |
265 | */ | |
266 | static int ASIdentifierChoice_is_canonical(ASIdentifierChoice *choice) | |
267 | { | |
0f113f3e | 268 | ASN1_INTEGER *a_max_plus_one = NULL; |
f28bc7d3 | 269 | ASN1_INTEGER *orig; |
0f113f3e MC |
270 | BIGNUM *bn = NULL; |
271 | int i, ret = 0; | |
96ea4ae9 | 272 | |
0f113f3e MC |
273 | /* |
274 | * Empty element or inheritance is canonical. | |
275 | */ | |
276 | if (choice == NULL || choice->type == ASIdentifierChoice_inherit) | |
277 | return 1; | |
96ea4ae9 BL |
278 | |
279 | /* | |
0f113f3e | 280 | * If not a list, or if empty list, it's broken. |
96ea4ae9 | 281 | */ |
0f113f3e MC |
282 | if (choice->type != ASIdentifierChoice_asIdsOrRanges || |
283 | sk_ASIdOrRange_num(choice->u.asIdsOrRanges) == 0) | |
284 | return 0; | |
96ea4ae9 BL |
285 | |
286 | /* | |
0f113f3e | 287 | * It's a list, check it. |
96ea4ae9 | 288 | */ |
0f113f3e MC |
289 | for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; i++) { |
290 | ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i); | |
291 | ASIdOrRange *b = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i + 1); | |
292 | ASN1_INTEGER *a_min = NULL, *a_max = NULL, *b_min = NULL, *b_max = | |
293 | NULL; | |
294 | ||
42d7d7dd MC |
295 | if (!extract_min_max(a, &a_min, &a_max) |
296 | || !extract_min_max(b, &b_min, &b_max)) | |
297 | goto done; | |
0f113f3e MC |
298 | |
299 | /* | |
300 | * Punt misordered list, overlapping start, or inverted range. | |
301 | */ | |
302 | if (ASN1_INTEGER_cmp(a_min, b_min) >= 0 || | |
303 | ASN1_INTEGER_cmp(a_min, a_max) > 0 || | |
304 | ASN1_INTEGER_cmp(b_min, b_max) > 0) | |
305 | goto done; | |
306 | ||
307 | /* | |
308 | * Calculate a_max + 1 to check for adjacency. | |
309 | */ | |
310 | if ((bn == NULL && (bn = BN_new()) == NULL) || | |
311 | ASN1_INTEGER_to_BN(a_max, bn) == NULL || | |
f28bc7d3 | 312 | !BN_add_word(bn, 1)) { |
e077455e | 313 | ERR_raise(ERR_LIB_X509V3, ERR_R_BN_LIB); |
f28bc7d3 BE |
314 | goto done; |
315 | } | |
316 | ||
317 | if ((a_max_plus_one = | |
318 | BN_to_ASN1_INTEGER(bn, orig = a_max_plus_one)) == NULL) { | |
319 | a_max_plus_one = orig; | |
e077455e | 320 | ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB); |
0f113f3e MC |
321 | goto done; |
322 | } | |
323 | ||
324 | /* | |
325 | * Punt if adjacent or overlapping. | |
326 | */ | |
327 | if (ASN1_INTEGER_cmp(a_max_plus_one, b_min) >= 0) | |
328 | goto done; | |
96ea4ae9 | 329 | } |
0f113f3e | 330 | |
96ea4ae9 | 331 | /* |
0f113f3e | 332 | * Check for inverted range. |
96ea4ae9 | 333 | */ |
0f113f3e MC |
334 | i = sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; |
335 | { | |
336 | ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i); | |
337 | ASN1_INTEGER *a_min, *a_max; | |
338 | if (a != NULL && a->type == ASIdOrRange_range) { | |
42d7d7dd MC |
339 | if (!extract_min_max(a, &a_min, &a_max) |
340 | || ASN1_INTEGER_cmp(a_min, a_max) > 0) | |
0f113f3e MC |
341 | goto done; |
342 | } | |
ef570cc8 | 343 | } |
ef570cc8 | 344 | |
0f113f3e | 345 | ret = 1; |
96ea4ae9 BL |
346 | |
347 | done: | |
0f113f3e MC |
348 | ASN1_INTEGER_free(a_max_plus_one); |
349 | BN_free(bn); | |
350 | return ret; | |
96ea4ae9 BL |
351 | } |
352 | ||
353 | /* | |
354 | * Check whether an ASIdentifier extension is in canonical form. | |
355 | */ | |
9021a5df | 356 | int X509v3_asid_is_canonical(ASIdentifiers *asid) |
96ea4ae9 | 357 | { |
0f113f3e MC |
358 | return (asid == NULL || |
359 | (ASIdentifierChoice_is_canonical(asid->asnum) && | |
360 | ASIdentifierChoice_is_canonical(asid->rdi))); | |
96ea4ae9 BL |
361 | } |
362 | ||
363 | /* | |
364 | * Whack an ASIdentifierChoice into canonical form. | |
365 | */ | |
366 | static int ASIdentifierChoice_canonize(ASIdentifierChoice *choice) | |
367 | { | |
0f113f3e | 368 | ASN1_INTEGER *a_max_plus_one = NULL; |
f28bc7d3 | 369 | ASN1_INTEGER *orig; |
0f113f3e MC |
370 | BIGNUM *bn = NULL; |
371 | int i, ret = 0; | |
96ea4ae9 BL |
372 | |
373 | /* | |
0f113f3e | 374 | * Nothing to do for empty element or inheritance. |
96ea4ae9 | 375 | */ |
0f113f3e MC |
376 | if (choice == NULL || choice->type == ASIdentifierChoice_inherit) |
377 | return 1; | |
96ea4ae9 | 378 | |
ef570cc8 | 379 | /* |
0f113f3e | 380 | * If not a list, or if empty list, it's broken. |
ef570cc8 | 381 | */ |
0f113f3e MC |
382 | if (choice->type != ASIdentifierChoice_asIdsOrRanges || |
383 | sk_ASIdOrRange_num(choice->u.asIdsOrRanges) == 0) { | |
9311d0c4 | 384 | ERR_raise(ERR_LIB_X509V3, X509V3_R_EXTENSION_VALUE_ERROR); |
0f113f3e MC |
385 | return 0; |
386 | } | |
ef570cc8 | 387 | |
96ea4ae9 | 388 | /* |
0f113f3e | 389 | * We have a non-empty list. Sort it. |
96ea4ae9 | 390 | */ |
0f113f3e | 391 | sk_ASIdOrRange_sort(choice->u.asIdsOrRanges); |
96ea4ae9 BL |
392 | |
393 | /* | |
0f113f3e MC |
394 | * Now check for errors and suboptimal encoding, rejecting the |
395 | * former and fixing the latter. | |
96ea4ae9 | 396 | */ |
0f113f3e MC |
397 | for (i = 0; i < sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; i++) { |
398 | ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i); | |
399 | ASIdOrRange *b = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i + 1); | |
400 | ASN1_INTEGER *a_min = NULL, *a_max = NULL, *b_min = NULL, *b_max = | |
401 | NULL; | |
402 | ||
42d7d7dd MC |
403 | if (!extract_min_max(a, &a_min, &a_max) |
404 | || !extract_min_max(b, &b_min, &b_max)) | |
405 | goto done; | |
0f113f3e MC |
406 | |
407 | /* | |
408 | * Make sure we're properly sorted (paranoia). | |
409 | */ | |
42d7d7dd MC |
410 | if (!ossl_assert(ASN1_INTEGER_cmp(a_min, b_min) <= 0)) |
411 | goto done; | |
0f113f3e MC |
412 | |
413 | /* | |
414 | * Punt inverted ranges. | |
415 | */ | |
416 | if (ASN1_INTEGER_cmp(a_min, a_max) > 0 || | |
417 | ASN1_INTEGER_cmp(b_min, b_max) > 0) | |
418 | goto done; | |
419 | ||
420 | /* | |
421 | * Check for overlaps. | |
422 | */ | |
423 | if (ASN1_INTEGER_cmp(a_max, b_min) >= 0) { | |
9311d0c4 | 424 | ERR_raise(ERR_LIB_X509V3, X509V3_R_EXTENSION_VALUE_ERROR); |
0f113f3e MC |
425 | goto done; |
426 | } | |
427 | ||
428 | /* | |
429 | * Calculate a_max + 1 to check for adjacency. | |
430 | */ | |
431 | if ((bn == NULL && (bn = BN_new()) == NULL) || | |
432 | ASN1_INTEGER_to_BN(a_max, bn) == NULL || | |
f28bc7d3 | 433 | !BN_add_word(bn, 1)) { |
e077455e | 434 | ERR_raise(ERR_LIB_X509V3, ERR_R_BN_LIB); |
f28bc7d3 BE |
435 | goto done; |
436 | } | |
437 | ||
438 | if ((a_max_plus_one = | |
439 | BN_to_ASN1_INTEGER(bn, orig = a_max_plus_one)) == NULL) { | |
440 | a_max_plus_one = orig; | |
e077455e | 441 | ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB); |
0f113f3e MC |
442 | goto done; |
443 | } | |
444 | ||
445 | /* | |
446 | * If a and b are adjacent, merge them. | |
447 | */ | |
448 | if (ASN1_INTEGER_cmp(a_max_plus_one, b_min) == 0) { | |
449 | ASRange *r; | |
450 | switch (a->type) { | |
451 | case ASIdOrRange_id: | |
e077455e | 452 | if ((r = OPENSSL_malloc(sizeof(*r))) == NULL) |
0f113f3e | 453 | goto done; |
0f113f3e MC |
454 | r->min = a_min; |
455 | r->max = b_max; | |
456 | a->type = ASIdOrRange_range; | |
457 | a->u.range = r; | |
458 | break; | |
459 | case ASIdOrRange_range: | |
460 | ASN1_INTEGER_free(a->u.range->max); | |
461 | a->u.range->max = b_max; | |
462 | break; | |
463 | } | |
464 | switch (b->type) { | |
465 | case ASIdOrRange_id: | |
466 | b->u.id = NULL; | |
467 | break; | |
468 | case ASIdOrRange_range: | |
469 | b->u.range->max = NULL; | |
470 | break; | |
471 | } | |
472 | ASIdOrRange_free(b); | |
473 | (void)sk_ASIdOrRange_delete(choice->u.asIdsOrRanges, i + 1); | |
474 | i--; | |
475 | continue; | |
476 | } | |
96ea4ae9 | 477 | } |
0f113f3e | 478 | |
96ea4ae9 | 479 | /* |
0f113f3e | 480 | * Check for final inverted range. |
96ea4ae9 | 481 | */ |
0f113f3e MC |
482 | i = sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1; |
483 | { | |
484 | ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i); | |
485 | ASN1_INTEGER *a_min, *a_max; | |
486 | if (a != NULL && a->type == ASIdOrRange_range) { | |
42d7d7dd MC |
487 | if (!extract_min_max(a, &a_min, &a_max) |
488 | || ASN1_INTEGER_cmp(a_min, a_max) > 0) | |
0f113f3e MC |
489 | goto done; |
490 | } | |
96ea4ae9 | 491 | } |
ef570cc8 | 492 | |
42d7d7dd MC |
493 | /* Paranoia */ |
494 | if (!ossl_assert(ASIdentifierChoice_is_canonical(choice))) | |
495 | goto done; | |
96ea4ae9 | 496 | |
0f113f3e | 497 | ret = 1; |
96ea4ae9 BL |
498 | |
499 | done: | |
0f113f3e MC |
500 | ASN1_INTEGER_free(a_max_plus_one); |
501 | BN_free(bn); | |
502 | return ret; | |
96ea4ae9 BL |
503 | } |
504 | ||
505 | /* | |
506 | * Whack an ASIdentifier extension into canonical form. | |
507 | */ | |
9021a5df | 508 | int X509v3_asid_canonize(ASIdentifiers *asid) |
96ea4ae9 | 509 | { |
0f113f3e MC |
510 | return (asid == NULL || |
511 | (ASIdentifierChoice_canonize(asid->asnum) && | |
512 | ASIdentifierChoice_canonize(asid->rdi))); | |
96ea4ae9 BL |
513 | } |
514 | ||
515 | /* | |
516 | * v2i method for an ASIdentifier extension. | |
517 | */ | |
2e6a7b3e | 518 | static void *v2i_ASIdentifiers(const struct v3_ext_method *method, |
0f113f3e MC |
519 | struct v3_ext_ctx *ctx, |
520 | STACK_OF(CONF_VALUE) *values) | |
96ea4ae9 | 521 | { |
0f113f3e MC |
522 | ASN1_INTEGER *min = NULL, *max = NULL; |
523 | ASIdentifiers *asid = NULL; | |
524 | int i; | |
96ea4ae9 | 525 | |
0f113f3e | 526 | if ((asid = ASIdentifiers_new()) == NULL) { |
e077455e | 527 | ERR_raise(ERR_LIB_X509V3, ERR_R_X509V3_LIB); |
0f113f3e | 528 | return NULL; |
96ea4ae9 BL |
529 | } |
530 | ||
0f113f3e MC |
531 | for (i = 0; i < sk_CONF_VALUE_num(values); i++) { |
532 | CONF_VALUE *val = sk_CONF_VALUE_value(values, i); | |
4c9b0a03 | 533 | int i1 = 0, i2 = 0, i3 = 0, is_range = 0, which = 0; |
0f113f3e MC |
534 | |
535 | /* | |
536 | * Figure out whether this is an AS or an RDI. | |
537 | */ | |
47864aea | 538 | if (!ossl_v3_name_cmp(val->name, "AS")) { |
0f113f3e | 539 | which = V3_ASID_ASNUM; |
47864aea | 540 | } else if (!ossl_v3_name_cmp(val->name, "RDI")) { |
0f113f3e MC |
541 | which = V3_ASID_RDI; |
542 | } else { | |
9311d0c4 | 543 | ERR_raise(ERR_LIB_X509V3, X509V3_R_EXTENSION_NAME_ERROR); |
c90c4693 | 544 | X509V3_conf_add_error_name_value(val); |
0f113f3e MC |
545 | goto err; |
546 | } | |
547 | ||
bac7e687 NH |
548 | if (val->value == NULL) { |
549 | ERR_raise(ERR_LIB_X509V3, X509V3_R_EXTENSION_VALUE_ERROR); | |
550 | goto err; | |
551 | } | |
552 | ||
0f113f3e MC |
553 | /* |
554 | * Handle inheritance. | |
555 | */ | |
86885c28 | 556 | if (strcmp(val->value, "inherit") == 0) { |
9021a5df | 557 | if (X509v3_asid_add_inherit(asid, which)) |
0f113f3e | 558 | continue; |
9311d0c4 | 559 | ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_INHERITANCE); |
c90c4693 | 560 | X509V3_conf_add_error_name_value(val); |
0f113f3e MC |
561 | goto err; |
562 | } | |
563 | ||
564 | /* | |
565 | * Number, range, or mistake, pick it apart and figure out which. | |
566 | */ | |
567 | i1 = strspn(val->value, "0123456789"); | |
568 | if (val->value[i1] == '\0') { | |
569 | is_range = 0; | |
570 | } else { | |
571 | is_range = 1; | |
572 | i2 = i1 + strspn(val->value + i1, " \t"); | |
573 | if (val->value[i2] != '-') { | |
9311d0c4 | 574 | ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_ASNUMBER); |
c90c4693 | 575 | X509V3_conf_add_error_name_value(val); |
0f113f3e MC |
576 | goto err; |
577 | } | |
578 | i2++; | |
579 | i2 = i2 + strspn(val->value + i2, " \t"); | |
580 | i3 = i2 + strspn(val->value + i2, "0123456789"); | |
581 | if (val->value[i3] != '\0') { | |
9311d0c4 | 582 | ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_ASRANGE); |
c90c4693 | 583 | X509V3_conf_add_error_name_value(val); |
0f113f3e MC |
584 | goto err; |
585 | } | |
586 | } | |
587 | ||
588 | /* | |
589 | * Syntax is ok, read and add it. | |
590 | */ | |
591 | if (!is_range) { | |
592 | if (!X509V3_get_value_int(val, &min)) { | |
e077455e | 593 | ERR_raise(ERR_LIB_X509V3, ERR_R_X509V3_LIB); |
0f113f3e MC |
594 | goto err; |
595 | } | |
596 | } else { | |
7644a9ae | 597 | char *s = OPENSSL_strdup(val->value); |
e077455e | 598 | if (s == NULL) |
0f113f3e | 599 | goto err; |
0f113f3e MC |
600 | s[i1] = '\0'; |
601 | min = s2i_ASN1_INTEGER(NULL, s); | |
602 | max = s2i_ASN1_INTEGER(NULL, s + i2); | |
603 | OPENSSL_free(s); | |
604 | if (min == NULL || max == NULL) { | |
e077455e | 605 | ERR_raise(ERR_LIB_X509V3, ERR_R_X509V3_LIB); |
0f113f3e MC |
606 | goto err; |
607 | } | |
608 | if (ASN1_INTEGER_cmp(min, max) > 0) { | |
9311d0c4 | 609 | ERR_raise(ERR_LIB_X509V3, X509V3_R_EXTENSION_VALUE_ERROR); |
0f113f3e MC |
610 | goto err; |
611 | } | |
612 | } | |
9021a5df | 613 | if (!X509v3_asid_add_id_or_range(asid, which, min, max)) { |
e077455e | 614 | ERR_raise(ERR_LIB_X509V3, ERR_R_X509V3_LIB); |
0f113f3e MC |
615 | goto err; |
616 | } | |
617 | min = max = NULL; | |
96ea4ae9 BL |
618 | } |
619 | ||
620 | /* | |
0f113f3e | 621 | * Canonize the result, then we're done. |
96ea4ae9 | 622 | */ |
9021a5df | 623 | if (!X509v3_asid_canonize(asid)) |
0f113f3e MC |
624 | goto err; |
625 | return asid; | |
96ea4ae9 BL |
626 | |
627 | err: | |
0f113f3e MC |
628 | ASIdentifiers_free(asid); |
629 | ASN1_INTEGER_free(min); | |
630 | ASN1_INTEGER_free(max); | |
631 | return NULL; | |
96ea4ae9 BL |
632 | } |
633 | ||
634 | /* | |
635 | * OpenSSL dispatch. | |
636 | */ | |
47864aea | 637 | const X509V3_EXT_METHOD ossl_v3_asid = { |
0f113f3e MC |
638 | NID_sbgp_autonomousSysNum, /* nid */ |
639 | 0, /* flags */ | |
640 | ASN1_ITEM_ref(ASIdentifiers), /* template */ | |
641 | 0, 0, 0, 0, /* old functions, ignored */ | |
642 | 0, /* i2s */ | |
643 | 0, /* s2i */ | |
644 | 0, /* i2v */ | |
645 | v2i_ASIdentifiers, /* v2i */ | |
646 | i2r_ASIdentifiers, /* i2r */ | |
647 | 0, /* r2i */ | |
648 | NULL /* extension-specific data */ | |
96ea4ae9 BL |
649 | }; |
650 | ||
651 | /* | |
652 | * Figure out whether extension uses inheritance. | |
653 | */ | |
9021a5df | 654 | int X509v3_asid_inherits(ASIdentifiers *asid) |
96ea4ae9 | 655 | { |
0f113f3e MC |
656 | return (asid != NULL && |
657 | ((asid->asnum != NULL && | |
658 | asid->asnum->type == ASIdentifierChoice_inherit) || | |
659 | (asid->rdi != NULL && | |
660 | asid->rdi->type == ASIdentifierChoice_inherit))); | |
96ea4ae9 BL |
661 | } |
662 | ||
663 | /* | |
664 | * Figure out whether parent contains child. | |
665 | */ | |
666 | static int asid_contains(ASIdOrRanges *parent, ASIdOrRanges *child) | |
667 | { | |
0f113f3e MC |
668 | ASN1_INTEGER *p_min = NULL, *p_max = NULL, *c_min = NULL, *c_max = NULL; |
669 | int p, c; | |
670 | ||
671 | if (child == NULL || parent == child) | |
672 | return 1; | |
673 | if (parent == NULL) | |
674 | return 0; | |
675 | ||
676 | p = 0; | |
677 | for (c = 0; c < sk_ASIdOrRange_num(child); c++) { | |
42d7d7dd MC |
678 | if (!extract_min_max(sk_ASIdOrRange_value(child, c), &c_min, &c_max)) |
679 | return 0; | |
0f113f3e MC |
680 | for (;; p++) { |
681 | if (p >= sk_ASIdOrRange_num(parent)) | |
682 | return 0; | |
cb1c3d1a MC |
683 | if (!extract_min_max(sk_ASIdOrRange_value(parent, p), &p_min, |
684 | &p_max)) | |
685 | return 0; | |
0f113f3e MC |
686 | if (ASN1_INTEGER_cmp(p_max, c_max) < 0) |
687 | continue; | |
688 | if (ASN1_INTEGER_cmp(p_min, c_min) > 0) | |
689 | return 0; | |
690 | break; | |
691 | } | |
96ea4ae9 | 692 | } |
96ea4ae9 | 693 | |
0f113f3e | 694 | return 1; |
96ea4ae9 BL |
695 | } |
696 | ||
697 | /* | |
0d4fb843 | 698 | * Test whether a is a subset of b. |
96ea4ae9 | 699 | */ |
9021a5df | 700 | int X509v3_asid_subset(ASIdentifiers *a, ASIdentifiers *b) |
96ea4ae9 | 701 | { |
01fc9b6b MC |
702 | int subset; |
703 | ||
704 | if (a == NULL || a == b) | |
705 | return 1; | |
706 | ||
707 | if (b == NULL) | |
708 | return 0; | |
709 | ||
710 | if (X509v3_asid_inherits(a) || X509v3_asid_inherits(b)) | |
711 | return 0; | |
712 | ||
713 | subset = a->asnum == NULL | |
714 | || (b->asnum != NULL | |
715 | && asid_contains(b->asnum->u.asIdsOrRanges, | |
716 | a->asnum->u.asIdsOrRanges)); | |
717 | if (!subset) | |
718 | return 0; | |
719 | ||
720 | return a->rdi == NULL | |
721 | || (b->rdi != NULL | |
722 | && asid_contains(b->rdi->u.asIdsOrRanges, | |
723 | a->rdi->u.asIdsOrRanges)); | |
96ea4ae9 BL |
724 | } |
725 | ||
726 | /* | |
727 | * Validation error handling via callback. | |
728 | */ | |
c73ad690 | 729 | #define validation_err(_err_) \ |
0f113f3e MC |
730 | do { \ |
731 | if (ctx != NULL) { \ | |
732 | ctx->error = _err_; \ | |
733 | ctx->error_depth = i; \ | |
734 | ctx->current_cert = x; \ | |
735 | ret = ctx->verify_cb(0, ctx); \ | |
736 | } else { \ | |
737 | ret = 0; \ | |
738 | } \ | |
739 | if (!ret) \ | |
740 | goto done; \ | |
96ea4ae9 BL |
741 | } while (0) |
742 | ||
743 | /* | |
744 | * Core code for RFC 3779 3.3 path validation. | |
745 | */ | |
9021a5df RS |
746 | static int asid_validate_path_internal(X509_STORE_CTX *ctx, |
747 | STACK_OF(X509) *chain, | |
748 | ASIdentifiers *ext) | |
96ea4ae9 | 749 | { |
0f113f3e MC |
750 | ASIdOrRanges *child_as = NULL, *child_rdi = NULL; |
751 | int i, ret = 1, inherit_as = 0, inherit_rdi = 0; | |
752 | X509 *x; | |
753 | ||
42d7d7dd MC |
754 | if (!ossl_assert(chain != NULL && sk_X509_num(chain) > 0) |
755 | || !ossl_assert(ctx != NULL || ext != NULL) | |
756 | || !ossl_assert(ctx == NULL || ctx->verify_cb != NULL)) { | |
757 | if (ctx != NULL) | |
758 | ctx->error = X509_V_ERR_UNSPECIFIED; | |
759 | return 0; | |
760 | } | |
761 | ||
0f113f3e MC |
762 | |
763 | /* | |
764 | * Figure out where to start. If we don't have an extension to | |
765 | * check, we're done. Otherwise, check canonical form and | |
766 | * set up for walking up the chain. | |
767 | */ | |
768 | if (ext != NULL) { | |
769 | i = -1; | |
770 | x = NULL; | |
771 | } else { | |
772 | i = 0; | |
773 | x = sk_X509_value(chain, i); | |
0f113f3e MC |
774 | if ((ext = x->rfc3779_asid) == NULL) |
775 | goto done; | |
96ea4ae9 | 776 | } |
9021a5df | 777 | if (!X509v3_asid_is_canonical(ext)) |
0f113f3e MC |
778 | validation_err(X509_V_ERR_INVALID_EXTENSION); |
779 | if (ext->asnum != NULL) { | |
780 | switch (ext->asnum->type) { | |
781 | case ASIdentifierChoice_inherit: | |
782 | inherit_as = 1; | |
783 | break; | |
784 | case ASIdentifierChoice_asIdsOrRanges: | |
785 | child_as = ext->asnum->u.asIdsOrRanges; | |
786 | break; | |
787 | } | |
96ea4ae9 | 788 | } |
0f113f3e MC |
789 | if (ext->rdi != NULL) { |
790 | switch (ext->rdi->type) { | |
791 | case ASIdentifierChoice_inherit: | |
792 | inherit_rdi = 1; | |
793 | break; | |
794 | case ASIdentifierChoice_asIdsOrRanges: | |
795 | child_rdi = ext->rdi->u.asIdsOrRanges; | |
796 | break; | |
797 | } | |
96ea4ae9 | 798 | } |
0f113f3e MC |
799 | |
800 | /* | |
801 | * Now walk up the chain. Extensions must be in canonical form, no | |
802 | * cert may list resources that its parent doesn't list. | |
803 | */ | |
804 | for (i++; i < sk_X509_num(chain); i++) { | |
805 | x = sk_X509_value(chain, i); | |
42d7d7dd MC |
806 | if (!ossl_assert(x != NULL)) { |
807 | if (ctx != NULL) | |
808 | ctx->error = X509_V_ERR_UNSPECIFIED; | |
809 | return 0; | |
810 | } | |
0f113f3e MC |
811 | if (x->rfc3779_asid == NULL) { |
812 | if (child_as != NULL || child_rdi != NULL) | |
813 | validation_err(X509_V_ERR_UNNESTED_RESOURCE); | |
814 | continue; | |
815 | } | |
9021a5df | 816 | if (!X509v3_asid_is_canonical(x->rfc3779_asid)) |
0f113f3e MC |
817 | validation_err(X509_V_ERR_INVALID_EXTENSION); |
818 | if (x->rfc3779_asid->asnum == NULL && child_as != NULL) { | |
819 | validation_err(X509_V_ERR_UNNESTED_RESOURCE); | |
820 | child_as = NULL; | |
821 | inherit_as = 0; | |
822 | } | |
823 | if (x->rfc3779_asid->asnum != NULL && | |
824 | x->rfc3779_asid->asnum->type == | |
825 | ASIdentifierChoice_asIdsOrRanges) { | |
826 | if (inherit_as | |
827 | || asid_contains(x->rfc3779_asid->asnum->u.asIdsOrRanges, | |
828 | child_as)) { | |
829 | child_as = x->rfc3779_asid->asnum->u.asIdsOrRanges; | |
830 | inherit_as = 0; | |
831 | } else { | |
832 | validation_err(X509_V_ERR_UNNESTED_RESOURCE); | |
833 | } | |
834 | } | |
835 | if (x->rfc3779_asid->rdi == NULL && child_rdi != NULL) { | |
836 | validation_err(X509_V_ERR_UNNESTED_RESOURCE); | |
837 | child_rdi = NULL; | |
838 | inherit_rdi = 0; | |
839 | } | |
840 | if (x->rfc3779_asid->rdi != NULL && | |
841 | x->rfc3779_asid->rdi->type == ASIdentifierChoice_asIdsOrRanges) { | |
842 | if (inherit_rdi || | |
843 | asid_contains(x->rfc3779_asid->rdi->u.asIdsOrRanges, | |
844 | child_rdi)) { | |
845 | child_rdi = x->rfc3779_asid->rdi->u.asIdsOrRanges; | |
846 | inherit_rdi = 0; | |
847 | } else { | |
848 | validation_err(X509_V_ERR_UNNESTED_RESOURCE); | |
849 | } | |
850 | } | |
96ea4ae9 | 851 | } |
0f113f3e MC |
852 | |
853 | /* | |
854 | * Trust anchor can't inherit. | |
855 | */ | |
42d7d7dd MC |
856 | if (!ossl_assert(x != NULL)) { |
857 | if (ctx != NULL) | |
858 | ctx->error = X509_V_ERR_UNSPECIFIED; | |
859 | return 0; | |
860 | } | |
0f113f3e MC |
861 | if (x->rfc3779_asid != NULL) { |
862 | if (x->rfc3779_asid->asnum != NULL && | |
863 | x->rfc3779_asid->asnum->type == ASIdentifierChoice_inherit) | |
864 | validation_err(X509_V_ERR_UNNESTED_RESOURCE); | |
865 | if (x->rfc3779_asid->rdi != NULL && | |
866 | x->rfc3779_asid->rdi->type == ASIdentifierChoice_inherit) | |
867 | validation_err(X509_V_ERR_UNNESTED_RESOURCE); | |
96ea4ae9 | 868 | } |
96ea4ae9 BL |
869 | |
870 | done: | |
0f113f3e | 871 | return ret; |
96ea4ae9 BL |
872 | } |
873 | ||
c73ad690 | 874 | #undef validation_err |
96ea4ae9 BL |
875 | |
876 | /* | |
877 | * RFC 3779 3.3 path validation -- called from X509_verify_cert(). | |
878 | */ | |
9021a5df | 879 | int X509v3_asid_validate_path(X509_STORE_CTX *ctx) |
96ea4ae9 | 880 | { |
42d7d7dd MC |
881 | if (ctx->chain == NULL |
882 | || sk_X509_num(ctx->chain) == 0 | |
88809830 MC |
883 | || ctx->verify_cb == NULL) { |
884 | ctx->error = X509_V_ERR_UNSPECIFIED; | |
42d7d7dd | 885 | return 0; |
88809830 | 886 | } |
9021a5df | 887 | return asid_validate_path_internal(ctx, ctx->chain, NULL); |
96ea4ae9 BL |
888 | } |
889 | ||
890 | /* | |
891 | * RFC 3779 3.3 path validation of an extension. | |
892 | * Test whether chain covers extension. | |
893 | */ | |
9021a5df RS |
894 | int X509v3_asid_validate_resource_set(STACK_OF(X509) *chain, |
895 | ASIdentifiers *ext, int allow_inheritance) | |
96ea4ae9 | 896 | { |
0f113f3e MC |
897 | if (ext == NULL) |
898 | return 1; | |
899 | if (chain == NULL || sk_X509_num(chain) == 0) | |
900 | return 0; | |
9021a5df | 901 | if (!allow_inheritance && X509v3_asid_inherits(ext)) |
0f113f3e | 902 | return 0; |
9021a5df | 903 | return asid_validate_path_internal(NULL, chain, ext); |
96ea4ae9 | 904 | } |
47bbaa5b DW |
905 | |
906 | #endif /* OPENSSL_NO_RFC3779 */ |