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-rw-r--r--src/lib/libcrypto/x509v3/v3_ncons.c560
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diff --git a/src/lib/libcrypto/x509v3/v3_ncons.c b/src/lib/libcrypto/x509v3/v3_ncons.c
deleted file mode 100644
index 2af15726a8..0000000000
--- a/src/lib/libcrypto/x509v3/v3_ncons.c
+++ /dev/null
@@ -1,560 +0,0 @@
1/* $OpenBSD: v3_ncons.c,v 1.9 2015/07/29 16:13:48 jsing 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
67static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
68 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval);
69static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
70 void *a, BIO *bp, int ind);
71static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
72 STACK_OF(GENERAL_SUBTREE) *trees, BIO *bp, int ind, char *name);
73static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip);
74
75static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc);
76static int nc_match_single(GENERAL_NAME *sub, GENERAL_NAME *gen);
77static int nc_dn(X509_NAME *sub, X509_NAME *nm);
78static int nc_dns(ASN1_IA5STRING *sub, ASN1_IA5STRING *dns);
79static int nc_email(ASN1_IA5STRING *sub, ASN1_IA5STRING *eml);
80static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base);
81
82const X509V3_EXT_METHOD v3_name_constraints = {
83 .ext_nid = NID_name_constraints,
84 .ext_flags = 0,
85 .it = ASN1_ITEM_ref(NAME_CONSTRAINTS),
86 .ext_new = NULL,
87 .ext_free = NULL,
88 .d2i = NULL,
89 .i2d = NULL,
90 .i2s = NULL,
91 .s2i = NULL,
92 .i2v = NULL,
93 .v2i = v2i_NAME_CONSTRAINTS,
94 .i2r = i2r_NAME_CONSTRAINTS,
95 .r2i = NULL,
96 .usr_data = NULL,
97};
98
99static const ASN1_TEMPLATE GENERAL_SUBTREE_seq_tt[] = {
100 {
101 .flags = 0,
102 .tag = 0,
103 .offset = offsetof(GENERAL_SUBTREE, base),
104 .field_name = "base",
105 .item = &GENERAL_NAME_it,
106 },
107 {
108 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
109 .tag = 0,
110 .offset = offsetof(GENERAL_SUBTREE, minimum),
111 .field_name = "minimum",
112 .item = &ASN1_INTEGER_it,
113 },
114 {
115 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,
116 .tag = 1,
117 .offset = offsetof(GENERAL_SUBTREE, maximum),
118 .field_name = "maximum",
119 .item = &ASN1_INTEGER_it,
120 },
121};
122
123const ASN1_ITEM GENERAL_SUBTREE_it = {
124 .itype = ASN1_ITYPE_SEQUENCE,
125 .utype = V_ASN1_SEQUENCE,
126 .templates = GENERAL_SUBTREE_seq_tt,
127 .tcount = sizeof(GENERAL_SUBTREE_seq_tt) / sizeof(ASN1_TEMPLATE),
128 .funcs = NULL,
129 .size = sizeof(GENERAL_SUBTREE),
130 .sname = "GENERAL_SUBTREE",
131};
132
133static const ASN1_TEMPLATE NAME_CONSTRAINTS_seq_tt[] = {
134 {
135 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_OPTIONAL,
136 .tag = 0,
137 .offset = offsetof(NAME_CONSTRAINTS, permittedSubtrees),
138 .field_name = "permittedSubtrees",
139 .item = &GENERAL_SUBTREE_it,
140 },
141 {
142 .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_SEQUENCE_OF | ASN1_TFLG_OPTIONAL,
143 .tag = 1,
144 .offset = offsetof(NAME_CONSTRAINTS, excludedSubtrees),
145 .field_name = "excludedSubtrees",
146 .item = &GENERAL_SUBTREE_it,
147 },
148};
149
150const ASN1_ITEM NAME_CONSTRAINTS_it = {
151 .itype = ASN1_ITYPE_SEQUENCE,
152 .utype = V_ASN1_SEQUENCE,
153 .templates = NAME_CONSTRAINTS_seq_tt,
154 .tcount = sizeof(NAME_CONSTRAINTS_seq_tt) / sizeof(ASN1_TEMPLATE),
155 .funcs = NULL,
156 .size = sizeof(NAME_CONSTRAINTS),
157 .sname = "NAME_CONSTRAINTS",
158};
159
160
161GENERAL_SUBTREE *
162GENERAL_SUBTREE_new(void)
163{
164 return (GENERAL_SUBTREE*)ASN1_item_new(&GENERAL_SUBTREE_it);
165}
166
167void
168GENERAL_SUBTREE_free(GENERAL_SUBTREE *a)
169{
170 ASN1_item_free((ASN1_VALUE *)a, &GENERAL_SUBTREE_it);
171}
172
173NAME_CONSTRAINTS *
174NAME_CONSTRAINTS_new(void)
175{
176 return (NAME_CONSTRAINTS*)ASN1_item_new(&NAME_CONSTRAINTS_it);
177}
178
179void
180NAME_CONSTRAINTS_free(NAME_CONSTRAINTS *a)
181{
182 ASN1_item_free((ASN1_VALUE *)a, &NAME_CONSTRAINTS_it);
183}
184
185static void *
186v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
187 STACK_OF(CONF_VALUE) *nval)
188{
189 int i;
190 CONF_VALUE tval, *val;
191 STACK_OF(GENERAL_SUBTREE) **ptree = NULL;
192 NAME_CONSTRAINTS *ncons = NULL;
193 GENERAL_SUBTREE *sub = NULL;
194
195 ncons = NAME_CONSTRAINTS_new();
196 if (!ncons)
197 goto memerr;
198 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
199 val = sk_CONF_VALUE_value(nval, i);
200 if (!strncmp(val->name, "permitted", 9) && val->name[9]) {
201 ptree = &ncons->permittedSubtrees;
202 tval.name = val->name + 10;
203 } else if (!strncmp(val->name, "excluded", 8) && val->name[8]) {
204 ptree = &ncons->excludedSubtrees;
205 tval.name = val->name + 9;
206 } else {
207 X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS,
208 X509V3_R_INVALID_SYNTAX);
209 goto err;
210 }
211 tval.value = val->value;
212 sub = GENERAL_SUBTREE_new();
213 if (!v2i_GENERAL_NAME_ex(sub->base, method, ctx, &tval, 1))
214 goto err;
215 if (!*ptree)
216 *ptree = sk_GENERAL_SUBTREE_new_null();
217 if (!*ptree || !sk_GENERAL_SUBTREE_push(*ptree, sub))
218 goto memerr;
219 sub = NULL;
220 }
221
222 return ncons;
223
224memerr:
225 X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS, ERR_R_MALLOC_FAILURE);
226err:
227 if (ncons)
228 NAME_CONSTRAINTS_free(ncons);
229 if (sub)
230 GENERAL_SUBTREE_free(sub);
231
232 return NULL;
233}
234
235static int
236i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a, BIO *bp, int ind)
237{
238 NAME_CONSTRAINTS *ncons = a;
239
240 do_i2r_name_constraints(method, ncons->permittedSubtrees,
241 bp, ind, "Permitted");
242 do_i2r_name_constraints(method, ncons->excludedSubtrees,
243 bp, ind, "Excluded");
244 return 1;
245}
246
247static int
248do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
249 STACK_OF(GENERAL_SUBTREE) *trees, BIO *bp, int ind, char *name)
250{
251 GENERAL_SUBTREE *tree;
252 int i;
253
254 if (sk_GENERAL_SUBTREE_num(trees) > 0)
255 BIO_printf(bp, "%*s%s:\n", ind, "", name);
256 for (i = 0; i < sk_GENERAL_SUBTREE_num(trees); i++) {
257 tree = sk_GENERAL_SUBTREE_value(trees, i);
258 BIO_printf(bp, "%*s", ind + 2, "");
259 if (tree->base->type == GEN_IPADD)
260 print_nc_ipadd(bp, tree->base->d.ip);
261 else
262 GENERAL_NAME_print(bp, tree->base);
263 BIO_puts(bp, "\n");
264 }
265 return 1;
266}
267
268static int
269print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip)
270{
271 int i, len;
272 unsigned char *p;
273
274 p = ip->data;
275 len = ip->length;
276 BIO_puts(bp, "IP:");
277 if (len == 8) {
278 BIO_printf(bp, "%d.%d.%d.%d/%d.%d.%d.%d",
279 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
280 } else if (len == 32) {
281 for (i = 0; i < 16; i++) {
282 BIO_printf(bp, "%X", p[0] << 8 | p[1]);
283 p += 2;
284 if (i == 7)
285 BIO_puts(bp, "/");
286 else if (i != 15)
287 BIO_puts(bp, ":");
288 }
289 } else
290 BIO_printf(bp, "IP Address:<invalid>");
291 return 1;
292}
293
294/* Check a certificate conforms to a specified set of constraints.
295 * Return values:
296 * X509_V_OK: All constraints obeyed.
297 * X509_V_ERR_PERMITTED_VIOLATION: Permitted subtree violation.
298 * X509_V_ERR_EXCLUDED_VIOLATION: Excluded subtree violation.
299 * X509_V_ERR_SUBTREE_MINMAX: Min or max values present and matching type.
300 * X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE: Unsupported constraint type.
301 * X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: bad unsupported constraint syntax.
302 * X509_V_ERR_UNSUPPORTED_NAME_SYNTAX: bad or unsupported syntax of name
303 */
304
305int
306NAME_CONSTRAINTS_check(X509 *x, NAME_CONSTRAINTS *nc)
307{
308 int r, i;
309 X509_NAME *nm;
310
311 nm = X509_get_subject_name(x);
312
313 if (X509_NAME_entry_count(nm) > 0) {
314 GENERAL_NAME gntmp;
315 gntmp.type = GEN_DIRNAME;
316 gntmp.d.directoryName = nm;
317
318 r = nc_match(&gntmp, nc);
319
320 if (r != X509_V_OK)
321 return r;
322
323 gntmp.type = GEN_EMAIL;
324
325 /* Process any email address attributes in subject name */
326
327 for (i = -1;;) {
328 X509_NAME_ENTRY *ne;
329 i = X509_NAME_get_index_by_NID(nm,
330 NID_pkcs9_emailAddress, i);
331 if (i == -1)
332 break;
333 ne = X509_NAME_get_entry(nm, i);
334 gntmp.d.rfc822Name = X509_NAME_ENTRY_get_data(ne);
335 if (gntmp.d.rfc822Name->type != V_ASN1_IA5STRING)
336 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
337
338 r = nc_match(&gntmp, nc);
339
340 if (r != X509_V_OK)
341 return r;
342 }
343
344 }
345
346 for (i = 0; i < sk_GENERAL_NAME_num(x->altname); i++) {
347 GENERAL_NAME *gen = sk_GENERAL_NAME_value(x->altname, i);
348 r = nc_match(gen, nc);
349 if (r != X509_V_OK)
350 return r;
351 }
352
353 return X509_V_OK;
354}
355
356static int
357nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc)
358{
359 GENERAL_SUBTREE *sub;
360 int i, r, match = 0;
361
362 /* Permitted subtrees: if any subtrees exist of matching the type
363 * at least one subtree must match.
364 */
365
366 for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->permittedSubtrees); i++) {
367 sub = sk_GENERAL_SUBTREE_value(nc->permittedSubtrees, i);
368 if (gen->type != sub->base->type)
369 continue;
370 if (sub->minimum || sub->maximum)
371 return X509_V_ERR_SUBTREE_MINMAX;
372 /* If we already have a match don't bother trying any more */
373 if (match == 2)
374 continue;
375 if (match == 0)
376 match = 1;
377 r = nc_match_single(gen, sub->base);
378 if (r == X509_V_OK)
379 match = 2;
380 else if (r != X509_V_ERR_PERMITTED_VIOLATION)
381 return r;
382 }
383
384 if (match == 1)
385 return X509_V_ERR_PERMITTED_VIOLATION;
386
387 /* Excluded subtrees: must not match any of these */
388
389 for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->excludedSubtrees); i++) {
390 sub = sk_GENERAL_SUBTREE_value(nc->excludedSubtrees, i);
391 if (gen->type != sub->base->type)
392 continue;
393 if (sub->minimum || sub->maximum)
394 return X509_V_ERR_SUBTREE_MINMAX;
395
396 r = nc_match_single(gen, sub->base);
397 if (r == X509_V_OK)
398 return X509_V_ERR_EXCLUDED_VIOLATION;
399 else if (r != X509_V_ERR_PERMITTED_VIOLATION)
400 return r;
401
402 }
403
404 return X509_V_OK;
405}
406
407static int
408nc_match_single(GENERAL_NAME *gen, GENERAL_NAME *base)
409{
410 switch (base->type) {
411 case GEN_DIRNAME:
412 return nc_dn(gen->d.directoryName, base->d.directoryName);
413
414 case GEN_DNS:
415 return nc_dns(gen->d.dNSName, base->d.dNSName);
416
417 case GEN_EMAIL:
418 return nc_email(gen->d.rfc822Name, base->d.rfc822Name);
419
420 case GEN_URI:
421 return nc_uri(gen->d.uniformResourceIdentifier,
422 base->d.uniformResourceIdentifier);
423
424 default:
425 return X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE;
426 }
427}
428
429/* directoryName name constraint matching.
430 * The canonical encoding of X509_NAME makes this comparison easy. It is
431 * matched if the subtree is a subset of the name.
432 */
433
434static int
435nc_dn(X509_NAME *nm, X509_NAME *base)
436{
437 /* Ensure canonical encodings are up to date. */
438 if (nm->modified && i2d_X509_NAME(nm, NULL) < 0)
439 return X509_V_ERR_OUT_OF_MEM;
440 if (base->modified && i2d_X509_NAME(base, NULL) < 0)
441 return X509_V_ERR_OUT_OF_MEM;
442 if (base->canon_enclen > nm->canon_enclen)
443 return X509_V_ERR_PERMITTED_VIOLATION;
444 if (memcmp(base->canon_enc, nm->canon_enc, base->canon_enclen))
445 return X509_V_ERR_PERMITTED_VIOLATION;
446 return X509_V_OK;
447}
448
449static int
450nc_dns(ASN1_IA5STRING *dns, ASN1_IA5STRING *base)
451{
452 char *baseptr = (char *)base->data;
453 char *dnsptr = (char *)dns->data;
454
455 /* Empty matches everything */
456 if (!*baseptr)
457 return X509_V_OK;
458 /* Otherwise can add zero or more components on the left so
459 * compare RHS and if dns is longer and expect '.' as preceding
460 * character.
461 */
462 if (dns->length > base->length) {
463 dnsptr += dns->length - base->length;
464 if (dnsptr[-1] != '.')
465 return X509_V_ERR_PERMITTED_VIOLATION;
466 }
467
468 if (strcasecmp(baseptr, dnsptr))
469 return X509_V_ERR_PERMITTED_VIOLATION;
470
471 return X509_V_OK;
472}
473
474static int
475nc_email(ASN1_IA5STRING *eml, ASN1_IA5STRING *base)
476{
477 const char *baseptr = (char *)base->data;
478 const char *emlptr = (char *)eml->data;
479 const char *baseat = strchr(baseptr, '@');
480 const char *emlat = strchr(emlptr, '@');
481
482 if (!emlat)
483 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
484 /* Special case: inital '.' is RHS match */
485 if (!baseat && (*baseptr == '.')) {
486 if (eml->length > base->length) {
487 emlptr += eml->length - base->length;
488 if (!strcasecmp(baseptr, emlptr))
489 return X509_V_OK;
490 }
491 return X509_V_ERR_PERMITTED_VIOLATION;
492 }
493
494 /* If we have anything before '@' match local part */
495
496 if (baseat) {
497 if (baseat != baseptr) {
498 if ((baseat - baseptr) != (emlat - emlptr))
499 return X509_V_ERR_PERMITTED_VIOLATION;
500 /* Case sensitive match of local part */
501 if (strncmp(baseptr, emlptr, emlat - emlptr))
502 return X509_V_ERR_PERMITTED_VIOLATION;
503 }
504 /* Position base after '@' */
505 baseptr = baseat + 1;
506 }
507 emlptr = emlat + 1;
508 /* Just have hostname left to match: case insensitive */
509 if (strcasecmp(baseptr, emlptr))
510 return X509_V_ERR_PERMITTED_VIOLATION;
511
512 return X509_V_OK;
513}
514
515static int
516nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base)
517{
518 const char *baseptr = (char *)base->data;
519 const char *hostptr = (char *)uri->data;
520 const char *p = strchr(hostptr, ':');
521 int hostlen;
522
523 /* Check for foo:// and skip past it */
524 if (!p || (p[1] != '/') || (p[2] != '/'))
525 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
526 hostptr = p + 3;
527
528 /* Determine length of hostname part of URI */
529
530 /* Look for a port indicator as end of hostname first */
531
532 p = strchr(hostptr, ':');
533 /* Otherwise look for trailing slash */
534 if (!p)
535 p = strchr(hostptr, '/');
536
537 if (!p)
538 hostlen = strlen(hostptr);
539 else
540 hostlen = p - hostptr;
541
542 if (hostlen == 0)
543 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
544
545 /* Special case: inital '.' is RHS match */
546 if (*baseptr == '.') {
547 if (hostlen > base->length) {
548 p = hostptr + hostlen - base->length;
549 if (!strncasecmp(p, baseptr, base->length))
550 return X509_V_OK;
551 }
552 return X509_V_ERR_PERMITTED_VIOLATION;
553 }
554
555 if ((base->length != (int)hostlen) ||
556 strncasecmp(hostptr, baseptr, hostlen))
557 return X509_V_ERR_PERMITTED_VIOLATION;
558
559 return X509_V_OK;
560}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-05-07 21:23:05 +0000