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-rw-r--r--src/lib/libcrypto/x509/x509_ncons.c569
1 files changed, 0 insertions, 569 deletions
diff --git a/src/lib/libcrypto/x509/x509_ncons.c b/src/lib/libcrypto/x509/x509_ncons.c
deleted file mode 100644
index 148a66e887..0000000000
--- a/src/lib/libcrypto/x509/x509_ncons.c
+++ /dev/null
@@ -1,569 +0,0 @@
1/* $OpenBSD: x509_ncons.c,v 1.11 2024/07/13 15:08:58 tb Exp $ */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project.
4 */
5/* ====================================================================
6 * Copyright (c) 2003 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#include <stdio.h>
60#include <string.h>
61
62#include <openssl/asn1t.h>
63#include <openssl/conf.h>
64#include <openssl/err.h>
65#include <openssl/x509v3.h>
66
67#include "x509_local.h"
68
69static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
70 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval);
71static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
72 void *a, BIO *bp, int ind);
73static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
74 STACK_OF(GENERAL_SUBTREE) *trees, BIO *bp, int ind, char *name);
75static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip);
76
77static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc);
78static int nc_match_single(GENERAL_NAME *sub, GENERAL_NAME *gen);
79static int nc_dn(X509_NAME *sub, X509_NAME *nm);
80static int nc_dns(ASN1_IA5STRING *sub, ASN1_IA5STRING *dns);
81static int nc_email(ASN1_IA5STRING *sub, ASN1_IA5STRING *eml);
82static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base);
83
84static const X509V3_EXT_METHOD x509v3_ext_name_constraints = {
85 .ext_nid = NID_name_constraints,
86 .ext_flags = 0,
87 .it = &NAME_CONSTRAINTS_it,
88 .ext_new = NULL,
89 .ext_free = NULL,
90 .d2i = NULL,
91 .i2d = NULL,
92 .i2s = NULL,
93 .s2i = NULL,
94 .i2v = NULL,
95 .v2i = v2i_NAME_CONSTRAINTS,
96 .i2r = i2r_NAME_CONSTRAINTS,
97 .r2i = NULL,
98 .usr_data = NULL,
99};
100
101const X509V3_EXT_METHOD *
102x509v3_ext_method_name_constraints(void)
103{
104 return &x509v3_ext_name_constraints;
105}
106
107static const ASN1_TEMPLATE GENERAL_SUBTREE_seq_tt[] = {
108 {
109 .flags = 0,
110 .tag = 0,
111 .offset = offsetof(GENERAL_SUBTREE, base),
112 .field_name = "base",
113 .item = &GENERAL_NAME_it,
114 },
115 {
116 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
117 .tag = 0,
118 .offset = offsetof(GENERAL_SUBTREE, minimum),
119 .field_name = "minimum",
120 .item = &ASN1_INTEGER_it,
121 },
122 {
123 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
124 .tag = 1,
125 .offset = offsetof(GENERAL_SUBTREE, maximum),
126 .field_name = "maximum",
127 .item = &ASN1_INTEGER_it,
128 },
129};
130
131const ASN1_ITEM GENERAL_SUBTREE_it = {
132 .itype = ASN1_ITYPE_SEQUENCE,
133 .utype = V_ASN1_SEQUENCE,
134 .templates = GENERAL_SUBTREE_seq_tt,
135 .tcount = sizeof(GENERAL_SUBTREE_seq_tt) / sizeof(ASN1_TEMPLATE),
136 .funcs = NULL,
137 .size = sizeof(GENERAL_SUBTREE),
138 .sname = "GENERAL_SUBTREE",
139};
140LCRYPTO_ALIAS(GENERAL_SUBTREE_it);
141
142static const ASN1_TEMPLATE NAME_CONSTRAINTS_seq_tt[] = {
143 {
144 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_OPTIONAL,
145 .tag = 0,
146 .offset = offsetof(NAME_CONSTRAINTS, permittedSubtrees),
147 .field_name = "permittedSubtrees",
148 .item = &GENERAL_SUBTREE_it,
149 },
150 {
151 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_OPTIONAL,
152 .tag = 1,
153 .offset = offsetof(NAME_CONSTRAINTS, excludedSubtrees),
154 .field_name = "excludedSubtrees",
155 .item = &GENERAL_SUBTREE_it,
156 },
157};
158
159const ASN1_ITEM NAME_CONSTRAINTS_it = {
160 .itype = ASN1_ITYPE_SEQUENCE,
161 .utype = V_ASN1_SEQUENCE,
162 .templates = NAME_CONSTRAINTS_seq_tt,
163 .tcount = sizeof(NAME_CONSTRAINTS_seq_tt) / sizeof(ASN1_TEMPLATE),
164 .funcs = NULL,
165 .size = sizeof(NAME_CONSTRAINTS),
166 .sname = "NAME_CONSTRAINTS",
167};
168LCRYPTO_ALIAS(NAME_CONSTRAINTS_it);
169
170
171GENERAL_SUBTREE *
172GENERAL_SUBTREE_new(void)
173{
174 return (GENERAL_SUBTREE*)ASN1_item_new(&GENERAL_SUBTREE_it);
175}
176LCRYPTO_ALIAS(GENERAL_SUBTREE_new);
177
178void
179GENERAL_SUBTREE_free(GENERAL_SUBTREE *a)
180{
181 ASN1_item_free((ASN1_VALUE *)a, &GENERAL_SUBTREE_it);
182}
183LCRYPTO_ALIAS(GENERAL_SUBTREE_free);
184
185NAME_CONSTRAINTS *
186NAME_CONSTRAINTS_new(void)
187{
188 return (NAME_CONSTRAINTS*)ASN1_item_new(&NAME_CONSTRAINTS_it);
189}
190LCRYPTO_ALIAS(NAME_CONSTRAINTS_new);
191
192void
193NAME_CONSTRAINTS_free(NAME_CONSTRAINTS *a)
194{
195 ASN1_item_free((ASN1_VALUE *)a, &NAME_CONSTRAINTS_it);
196}
197LCRYPTO_ALIAS(NAME_CONSTRAINTS_free);
198
199static void *
200v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
201 STACK_OF(CONF_VALUE) *nval)
202{
203 int i;
204 CONF_VALUE tval, *val;
205 STACK_OF(GENERAL_SUBTREE) **ptree = NULL;
206 NAME_CONSTRAINTS *ncons = NULL;
207 GENERAL_SUBTREE *sub = NULL;
208
209 ncons = NAME_CONSTRAINTS_new();
210 if (!ncons)
211 goto memerr;
212 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
213 val = sk_CONF_VALUE_value(nval, i);
214 if (!strncmp(val->name, "permitted", 9) && val->name[9]) {
215 ptree = &ncons->permittedSubtrees;
216 tval.name = val->name + 10;
217 } else if (!strncmp(val->name, "excluded", 8) && val->name[8]) {
218 ptree = &ncons->excludedSubtrees;
219 tval.name = val->name + 9;
220 } else {
221 X509V3error(X509V3_R_INVALID_SYNTAX);
222 goto err;
223 }
224 tval.value = val->value;
225 sub = GENERAL_SUBTREE_new();
226 if (!v2i_GENERAL_NAME_ex(sub->base, method, ctx, &tval, 1))
227 goto err;
228 if (!*ptree)
229 *ptree = sk_GENERAL_SUBTREE_new_null();
230 if (!*ptree || !sk_GENERAL_SUBTREE_push(*ptree, sub))
231 goto memerr;
232 sub = NULL;
233 }
234
235 return ncons;
236
237memerr:
238 X509V3error(ERR_R_MALLOC_FAILURE);
239err:
240 NAME_CONSTRAINTS_free(ncons);
241 GENERAL_SUBTREE_free(sub);
242 return NULL;
243}
244
245static int
246i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a, BIO *bp, int ind)
247{
248 NAME_CONSTRAINTS *ncons = a;
249
250 do_i2r_name_constraints(method, ncons->permittedSubtrees,
251 bp, ind, "Permitted");
252 do_i2r_name_constraints(method, ncons->excludedSubtrees,
253 bp, ind, "Excluded");
254 return 1;
255}
256
257static int
258do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
259 STACK_OF(GENERAL_SUBTREE) *trees, BIO *bp, int ind, char *name)
260{
261 GENERAL_SUBTREE *tree;
262 int i;
263
264 if (sk_GENERAL_SUBTREE_num(trees) > 0)
265 BIO_printf(bp, "%*s%s:\n", ind, "", name);
266 for (i = 0; i < sk_GENERAL_SUBTREE_num(trees); i++) {
267 tree = sk_GENERAL_SUBTREE_value(trees, i);
268 BIO_printf(bp, "%*s", ind + 2, "");
269 if (tree->base->type == GEN_IPADD)
270 print_nc_ipadd(bp, tree->base->d.ip);
271 else
272 GENERAL_NAME_print(bp, tree->base);
273 BIO_puts(bp, "\n");
274 }
275 return 1;
276}
277
278static int
279print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip)
280{
281 int i, len;
282 unsigned char *p;
283
284 p = ip->data;
285 len = ip->length;
286 BIO_puts(bp, "IP:");
287 if (len == 8) {
288 BIO_printf(bp, "%d.%d.%d.%d/%d.%d.%d.%d",
289 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
290 } else if (len == 32) {
291 for (i = 0; i < 16; i++) {
292 BIO_printf(bp, "%X", p[0] << 8 | p[1]);
293 p += 2;
294 if (i == 7)
295 BIO_puts(bp, "/");
296 else if (i != 15)
297 BIO_puts(bp, ":");
298 }
299 } else
300 BIO_printf(bp, "IP Address:<invalid>");
301 return 1;
302}
303
304/* Check a certificate conforms to a specified set of constraints.
305 * Return values:
306 * X509_V_OK: All constraints obeyed.
307 * X509_V_ERR_PERMITTED_VIOLATION: Permitted subtree violation.
308 * X509_V_ERR_EXCLUDED_VIOLATION: Excluded subtree violation.
309 * X509_V_ERR_SUBTREE_MINMAX: Min or max values present and matching type.
310 * X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE: Unsupported constraint type.
311 * X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: bad unsupported constraint syntax.
312 * X509_V_ERR_UNSUPPORTED_NAME_SYNTAX: bad or unsupported syntax of name
313 */
314
315int
316NAME_CONSTRAINTS_check(X509 *x, NAME_CONSTRAINTS *nc)
317{
318 int r, i;
319 X509_NAME *nm;
320
321 nm = X509_get_subject_name(x);
322
323 if (X509_NAME_entry_count(nm) > 0) {
324 GENERAL_NAME gntmp;
325 gntmp.type = GEN_DIRNAME;
326 gntmp.d.directoryName = nm;
327
328 r = nc_match(&gntmp, nc);
329
330 if (r != X509_V_OK)
331 return r;
332
333 gntmp.type = GEN_EMAIL;
334
335 /* Process any email address attributes in subject name */
336
337 for (i = -1;;) {
338 X509_NAME_ENTRY *ne;
339 i = X509_NAME_get_index_by_NID(nm,
340 NID_pkcs9_emailAddress, i);
341 if (i == -1)
342 break;
343 ne = X509_NAME_get_entry(nm, i);
344 gntmp.d.rfc822Name = X509_NAME_ENTRY_get_data(ne);
345 if (gntmp.d.rfc822Name->type != V_ASN1_IA5STRING)
346 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
347
348 r = nc_match(&gntmp, nc);
349
350 if (r != X509_V_OK)
351 return r;
352 }
353
354 }
355
356 for (i = 0; i < sk_GENERAL_NAME_num(x->altname); i++) {
357 GENERAL_NAME *gen = sk_GENERAL_NAME_value(x->altname, i);
358 r = nc_match(gen, nc);
359 if (r != X509_V_OK)
360 return r;
361 }
362 return X509_V_OK;
363}
364LCRYPTO_ALIAS(NAME_CONSTRAINTS_check);
365static int
366nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc)
367{
368 GENERAL_SUBTREE *sub;
369 int i, r, match = 0;
370
371 /* Permitted subtrees: if any subtrees exist of matching the type
372 * at least one subtree must match.
373 */
374
375 for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->permittedSubtrees); i++) {
376 sub = sk_GENERAL_SUBTREE_value(nc->permittedSubtrees, i);
377 if (gen->type != sub->base->type)
378 continue;
379 if (sub->minimum || sub->maximum)
380 return X509_V_ERR_SUBTREE_MINMAX;
381 /* If we already have a match don't bother trying any more */
382 if (match == 2)
383 continue;
384 if (match == 0)
385 match = 1;
386 r = nc_match_single(gen, sub->base);
387 if (r == X509_V_OK)
388 match = 2;
389 else if (r != X509_V_ERR_PERMITTED_VIOLATION)
390 return r;
391 }
392
393 if (match == 1)
394 return X509_V_ERR_PERMITTED_VIOLATION;
395
396 /* Excluded subtrees: must not match any of these */
397
398 for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->excludedSubtrees); i++) {
399 sub = sk_GENERAL_SUBTREE_value(nc->excludedSubtrees, i);
400 if (gen->type != sub->base->type)
401 continue;
402 if (sub->minimum || sub->maximum)
403 return X509_V_ERR_SUBTREE_MINMAX;
404
405 r = nc_match_single(gen, sub->base);
406 if (r == X509_V_OK)
407 return X509_V_ERR_EXCLUDED_VIOLATION;
408 else if (r != X509_V_ERR_PERMITTED_VIOLATION)
409 return r;
410
411 }
412
413 return X509_V_OK;
414}
415
416static int
417nc_match_single(GENERAL_NAME *gen, GENERAL_NAME *base)
418{
419 switch (base->type) {
420 case GEN_DIRNAME:
421 return nc_dn(gen->d.directoryName, base->d.directoryName);
422
423 case GEN_DNS:
424 return nc_dns(gen->d.dNSName, base->d.dNSName);
425
426 case GEN_EMAIL:
427 return nc_email(gen->d.rfc822Name, base->d.rfc822Name);
428
429 case GEN_URI:
430 return nc_uri(gen->d.uniformResourceIdentifier,
431 base->d.uniformResourceIdentifier);
432
433 default:
434 return X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE;
435 }
436}
437
438/* directoryName name constraint matching.
439 * The canonical encoding of X509_NAME makes this comparison easy. It is
440 * matched if the subtree is a subset of the name.
441 */
442
443static int
444nc_dn(X509_NAME *nm, X509_NAME *base)
445{
446 /* Ensure canonical encodings are up to date. */
447 if (nm->modified && i2d_X509_NAME(nm, NULL) < 0)
448 return X509_V_ERR_OUT_OF_MEM;
449 if (base->modified && i2d_X509_NAME(base, NULL) < 0)
450 return X509_V_ERR_OUT_OF_MEM;
451 if (base->canon_enclen > nm->canon_enclen)
452 return X509_V_ERR_PERMITTED_VIOLATION;
453 if (memcmp(base->canon_enc, nm->canon_enc, base->canon_enclen))
454 return X509_V_ERR_PERMITTED_VIOLATION;
455 return X509_V_OK;
456}
457
458static int
459nc_dns(ASN1_IA5STRING *dns, ASN1_IA5STRING *base)
460{
461 char *baseptr = (char *)base->data;
462 char *dnsptr = (char *)dns->data;
463
464 /* Empty matches everything */
465 if (!*baseptr)
466 return X509_V_OK;
467 /* Otherwise can add zero or more components on the left so
468 * compare RHS and if dns is longer and expect '.' as preceding
469 * character.
470 */
471 if (dns->length > base->length) {
472 dnsptr += dns->length - base->length;
473 if (baseptr[0] != '.' && dnsptr[-1] != '.')
474 return X509_V_ERR_PERMITTED_VIOLATION;
475 }
476
477 if (strcasecmp(baseptr, dnsptr))
478 return X509_V_ERR_PERMITTED_VIOLATION;
479
480 return X509_V_OK;
481}
482
483static int
484nc_email(ASN1_IA5STRING *eml, ASN1_IA5STRING *base)
485{
486 const char *baseptr = (char *)base->data;
487 const char *emlptr = (char *)eml->data;
488 const char *baseat = strchr(baseptr, '@');
489 const char *emlat = strchr(emlptr, '@');
490
491 if (!emlat)
492 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
493 /* Special case: initial '.' is RHS match */
494 if (!baseat && (*baseptr == '.')) {
495 if (eml->length > base->length) {
496 emlptr += eml->length - base->length;
497 if (!strcasecmp(baseptr, emlptr))
498 return X509_V_OK;
499 }
500 return X509_V_ERR_PERMITTED_VIOLATION;
501 }
502
503 /* If we have anything before '@' match local part */
504
505 if (baseat) {
506 if (baseat != baseptr) {
507 if ((baseat - baseptr) != (emlat - emlptr))
508 return X509_V_ERR_PERMITTED_VIOLATION;
509 /* Case sensitive match of local part */
510 if (strncmp(baseptr, emlptr, emlat - emlptr))
511 return X509_V_ERR_PERMITTED_VIOLATION;
512 }
513 /* Position base after '@' */
514 baseptr = baseat + 1;
515 }
516 emlptr = emlat + 1;
517 /* Just have hostname left to match: case insensitive */
518 if (strcasecmp(baseptr, emlptr))
519 return X509_V_ERR_PERMITTED_VIOLATION;
520
521 return X509_V_OK;
522}
523
524static int
525nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base)
526{
527 const char *baseptr = (char *)base->data;
528 const char *hostptr = (char *)uri->data;
529 const char *p = strchr(hostptr, ':');
530 int hostlen;
531
532 /* Check for foo:// and skip past it */
533 if (!p || (p[1] != '/') || (p[2] != '/'))
534 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
535 hostptr = p + 3;
536
537 /* Determine length of hostname part of URI */
538
539 /* Look for a port indicator as end of hostname first */
540
541 p = strchr(hostptr, ':');
542 /* Otherwise look for trailing slash */
543 if (!p)
544 p = strchr(hostptr, '/');
545
546 if (!p)
547 hostlen = strlen(hostptr);
548 else
549 hostlen = p - hostptr;
550
551 if (hostlen == 0)
552 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
553
554 /* Special case: initial '.' is RHS match */
555 if (*baseptr == '.') {
556 if (hostlen > base->length) {
557 p = hostptr + hostlen - base->length;
558 if (!strncasecmp(p, baseptr, base->length))
559 return X509_V_OK;
560 }
561 return X509_V_ERR_PERMITTED_VIOLATION;
562 }
563
564 if ((base->length != (int)hostlen) ||
565 strncasecmp(hostptr, baseptr, hostlen))
566 return X509_V_ERR_PERMITTED_VIOLATION;
567
568 return X509_V_OK;
569}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-12-23 15:15:05 +0000