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520b76ff | 1 | /* v3_ncons.c */ |
2e597528 | 2 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
520b76ff DSH |
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 | ||
60 | #include <stdio.h> | |
61 | #include "cryptlib.h" | |
62 | #include <openssl/asn1t.h> | |
63 | #include <openssl/conf.h> | |
64 | #include <openssl/x509v3.h> | |
65 | ||
babb3798 BL |
66 | static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, |
67 | X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval); | |
68 | static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, | |
520b76ff | 69 | void *a, BIO *bp, int ind); |
babb3798 BL |
70 | static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method, |
71 | STACK_OF(GENERAL_SUBTREE) *trees, | |
72 | BIO *bp, int ind, char *name); | |
520b76ff DSH |
73 | static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip); |
74 | ||
e9746e03 DSH |
75 | static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc); |
76 | static int nc_match_single(GENERAL_NAME *sub, GENERAL_NAME *gen); | |
77 | static int nc_dn(X509_NAME *sub, X509_NAME *nm); | |
78 | static int nc_dns(ASN1_IA5STRING *sub, ASN1_IA5STRING *dns); | |
79 | static int nc_email(ASN1_IA5STRING *sub, ASN1_IA5STRING *eml); | |
80 | static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base); | |
dd36fce0 | 81 | static int nc_ip(ASN1_OCTET_STRING *ip, ASN1_OCTET_STRING *base); |
e9746e03 | 82 | |
560b79cb | 83 | const X509V3_EXT_METHOD v3_name_constraints = { |
520b76ff DSH |
84 | NID_name_constraints, 0, |
85 | ASN1_ITEM_ref(NAME_CONSTRAINTS), | |
86 | 0,0,0,0, | |
87 | 0,0, | |
88 | 0, v2i_NAME_CONSTRAINTS, | |
89 | i2r_NAME_CONSTRAINTS,0, | |
90 | NULL | |
91 | }; | |
92 | ||
93 | ASN1_SEQUENCE(GENERAL_SUBTREE) = { | |
94 | ASN1_SIMPLE(GENERAL_SUBTREE, base, GENERAL_NAME), | |
95 | ASN1_IMP_OPT(GENERAL_SUBTREE, minimum, ASN1_INTEGER, 0), | |
96 | ASN1_IMP_OPT(GENERAL_SUBTREE, maximum, ASN1_INTEGER, 1) | |
97 | } ASN1_SEQUENCE_END(GENERAL_SUBTREE) | |
98 | ||
99 | ASN1_SEQUENCE(NAME_CONSTRAINTS) = { | |
100 | ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, permittedSubtrees, | |
101 | GENERAL_SUBTREE, 0), | |
102 | ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, excludedSubtrees, | |
103 | GENERAL_SUBTREE, 1), | |
104 | } ASN1_SEQUENCE_END(NAME_CONSTRAINTS) | |
105 | ||
106 | ||
107 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(GENERAL_SUBTREE) | |
108 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(NAME_CONSTRAINTS) | |
109 | ||
babb3798 BL |
110 | static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, |
111 | X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval) | |
520b76ff DSH |
112 | { |
113 | int i; | |
114 | CONF_VALUE tval, *val; | |
115 | STACK_OF(GENERAL_SUBTREE) **ptree = NULL; | |
116 | NAME_CONSTRAINTS *ncons = NULL; | |
117 | GENERAL_SUBTREE *sub = NULL; | |
118 | ncons = NAME_CONSTRAINTS_new(); | |
119 | if (!ncons) | |
120 | goto memerr; | |
121 | for(i = 0; i < sk_CONF_VALUE_num(nval); i++) | |
122 | { | |
123 | val = sk_CONF_VALUE_value(nval, i); | |
124 | if (!strncmp(val->name, "permitted", 9) && val->name[9]) | |
125 | { | |
126 | ptree = &ncons->permittedSubtrees; | |
127 | tval.name = val->name + 10; | |
128 | } | |
129 | else if (!strncmp(val->name, "excluded", 8) && val->name[8]) | |
130 | { | |
131 | ptree = &ncons->excludedSubtrees; | |
132 | tval.name = val->name + 9; | |
133 | } | |
134 | else | |
135 | { | |
136 | X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS, X509V3_R_INVALID_SYNTAX); | |
137 | goto err; | |
138 | } | |
139 | tval.value = val->value; | |
140 | sub = GENERAL_SUBTREE_new(); | |
141 | if (!v2i_GENERAL_NAME_ex(sub->base, method, ctx, &tval, 1)) | |
142 | goto err; | |
143 | if (!*ptree) | |
144 | *ptree = sk_GENERAL_SUBTREE_new_null(); | |
145 | if (!*ptree || !sk_GENERAL_SUBTREE_push(*ptree, sub)) | |
146 | goto memerr; | |
147 | sub = NULL; | |
148 | } | |
149 | ||
150 | return ncons; | |
151 | ||
152 | memerr: | |
153 | X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS, ERR_R_MALLOC_FAILURE); | |
154 | err: | |
155 | if (ncons) | |
156 | NAME_CONSTRAINTS_free(ncons); | |
157 | if (sub) | |
158 | GENERAL_SUBTREE_free(sub); | |
159 | ||
160 | return NULL; | |
161 | } | |
162 | ||
163 | ||
164 | ||
165 | ||
babb3798 BL |
166 | static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a, |
167 | BIO *bp, int ind) | |
520b76ff DSH |
168 | { |
169 | NAME_CONSTRAINTS *ncons = a; | |
170 | do_i2r_name_constraints(method, ncons->permittedSubtrees, | |
171 | bp, ind, "Permitted"); | |
172 | do_i2r_name_constraints(method, ncons->excludedSubtrees, | |
173 | bp, ind, "Excluded"); | |
174 | return 1; | |
175 | } | |
176 | ||
babb3798 BL |
177 | static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method, |
178 | STACK_OF(GENERAL_SUBTREE) *trees, | |
179 | BIO *bp, int ind, char *name) | |
520b76ff DSH |
180 | { |
181 | GENERAL_SUBTREE *tree; | |
182 | int i; | |
183 | if (sk_GENERAL_SUBTREE_num(trees) > 0) | |
184 | BIO_printf(bp, "%*s%s:\n", ind, "", name); | |
185 | for(i = 0; i < sk_GENERAL_SUBTREE_num(trees); i++) | |
186 | { | |
187 | tree = sk_GENERAL_SUBTREE_value(trees, i); | |
188 | BIO_printf(bp, "%*s", ind + 2, ""); | |
189 | if (tree->base->type == GEN_IPADD) | |
190 | print_nc_ipadd(bp, tree->base->d.ip); | |
191 | else | |
192 | GENERAL_NAME_print(bp, tree->base); | |
520b76ff DSH |
193 | BIO_puts(bp, "\n"); |
194 | } | |
195 | return 1; | |
196 | } | |
197 | ||
198 | static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip) | |
199 | { | |
200 | int i, len; | |
201 | unsigned char *p; | |
202 | p = ip->data; | |
203 | len = ip->length; | |
204 | BIO_puts(bp, "IP:"); | |
205 | if(len == 8) | |
206 | { | |
207 | BIO_printf(bp, "%d.%d.%d.%d/%d.%d.%d.%d", | |
208 | p[0], p[1], p[2], p[3], | |
209 | p[4], p[5], p[6], p[7]); | |
210 | } | |
211 | else if(len == 32) | |
212 | { | |
213 | for (i = 0; i < 16; i++) | |
214 | { | |
215 | BIO_printf(bp, "%X", p[0] << 8 | p[1]); | |
216 | p += 2; | |
217 | if (i == 7) | |
218 | BIO_puts(bp, "/"); | |
219 | else if (i != 15) | |
220 | BIO_puts(bp, ":"); | |
221 | } | |
222 | } | |
223 | else | |
224 | BIO_printf(bp, "IP Address:<invalid>"); | |
225 | return 1; | |
226 | } | |
227 | ||
e9746e03 DSH |
228 | /* Check a certificate conforms to a specified set of constraints. |
229 | * Return values: | |
230 | * X509_V_OK: All constraints obeyed. | |
231 | * X509_V_ERR_PERMITTED_VIOLATION: Permitted subtree violation. | |
232 | * X509_V_ERR_EXCLUDED_VIOLATION: Excluded subtree violation. | |
233 | * X509_V_ERR_SUBTREE_MINMAX: Min or max values present and matching type. | |
234 | * X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE: Unsupported constraint type. | |
235 | * X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: bad unsupported constraint syntax. | |
236 | * X509_V_ERR_UNSUPPORTED_NAME_SYNTAX: bad or unsupported syntax of name | |
237 | ||
238 | */ | |
239 | ||
240 | int NAME_CONSTRAINTS_check(X509 *x, NAME_CONSTRAINTS *nc) | |
241 | { | |
242 | int r, i; | |
243 | X509_NAME *nm; | |
244 | ||
245 | nm = X509_get_subject_name(x); | |
246 | ||
247 | if (X509_NAME_entry_count(nm) > 0) | |
248 | { | |
249 | GENERAL_NAME gntmp; | |
250 | gntmp.type = GEN_DIRNAME; | |
251 | gntmp.d.directoryName = nm; | |
252 | ||
253 | r = nc_match(&gntmp, nc); | |
254 | ||
255 | if (r != X509_V_OK) | |
256 | return r; | |
257 | ||
258 | gntmp.type = GEN_EMAIL; | |
259 | ||
260 | ||
261 | /* Process any email address attributes in subject name */ | |
262 | ||
263 | for (i = -1;;) | |
264 | { | |
265 | X509_NAME_ENTRY *ne; | |
266 | i = X509_NAME_get_index_by_NID(nm, | |
267 | NID_pkcs9_emailAddress, | |
268 | i); | |
269 | if (i == -1) | |
270 | break; | |
271 | ne = X509_NAME_get_entry(nm, i); | |
272 | gntmp.d.rfc822Name = X509_NAME_ENTRY_get_data(ne); | |
273 | if (gntmp.d.rfc822Name->type != V_ASN1_IA5STRING) | |
274 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; | |
275 | ||
276 | r = nc_match(&gntmp, nc); | |
277 | ||
278 | if (r != X509_V_OK) | |
279 | return r; | |
280 | } | |
281 | ||
282 | } | |
283 | ||
284 | for (i = 0; i < sk_GENERAL_NAME_num(x->altname); i++) | |
285 | { | |
286 | GENERAL_NAME *gen = sk_GENERAL_NAME_value(x->altname, i); | |
287 | r = nc_match(gen, nc); | |
288 | if (r != X509_V_OK) | |
289 | return r; | |
290 | } | |
291 | ||
292 | return X509_V_OK; | |
293 | ||
294 | } | |
295 | ||
296 | static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc) | |
297 | { | |
298 | GENERAL_SUBTREE *sub; | |
299 | int i, r, match = 0; | |
300 | ||
301 | /* Permitted subtrees: if any subtrees exist of matching the type | |
302 | * at least one subtree must match. | |
303 | */ | |
304 | ||
305 | for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->permittedSubtrees); i++) | |
306 | { | |
307 | sub = sk_GENERAL_SUBTREE_value(nc->permittedSubtrees, i); | |
308 | if (gen->type != sub->base->type) | |
309 | continue; | |
310 | if (sub->minimum || sub->maximum) | |
311 | return X509_V_ERR_SUBTREE_MINMAX; | |
312 | /* If we already have a match don't bother trying any more */ | |
313 | if (match == 2) | |
314 | continue; | |
315 | if (match == 0) | |
316 | match = 1; | |
317 | r = nc_match_single(gen, sub->base); | |
318 | if (r == X509_V_OK) | |
319 | match = 2; | |
320 | else if (r != X509_V_ERR_PERMITTED_VIOLATION) | |
321 | return r; | |
322 | } | |
323 | ||
324 | if (match == 1) | |
325 | return X509_V_ERR_PERMITTED_VIOLATION; | |
326 | ||
327 | /* Excluded subtrees: must not match any of these */ | |
328 | ||
329 | for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->excludedSubtrees); i++) | |
330 | { | |
331 | sub = sk_GENERAL_SUBTREE_value(nc->excludedSubtrees, i); | |
332 | if (gen->type != sub->base->type) | |
333 | continue; | |
334 | if (sub->minimum || sub->maximum) | |
335 | return X509_V_ERR_SUBTREE_MINMAX; | |
336 | ||
337 | r = nc_match_single(gen, sub->base); | |
338 | if (r == X509_V_OK) | |
339 | return X509_V_ERR_EXCLUDED_VIOLATION; | |
340 | else if (r != X509_V_ERR_PERMITTED_VIOLATION) | |
341 | return r; | |
342 | ||
343 | } | |
344 | ||
345 | return X509_V_OK; | |
346 | ||
347 | } | |
348 | ||
349 | static int nc_match_single(GENERAL_NAME *gen, GENERAL_NAME *base) | |
350 | { | |
351 | switch(base->type) | |
352 | { | |
353 | case GEN_DIRNAME: | |
354 | return nc_dn(gen->d.directoryName, base->d.directoryName); | |
355 | ||
356 | case GEN_DNS: | |
357 | return nc_dns(gen->d.dNSName, base->d.dNSName); | |
358 | ||
359 | case GEN_EMAIL: | |
360 | return nc_email(gen->d.rfc822Name, base->d.rfc822Name); | |
361 | ||
362 | case GEN_URI: | |
363 | return nc_uri(gen->d.uniformResourceIdentifier, | |
364 | base->d.uniformResourceIdentifier); | |
365 | ||
dd36fce0 LADL |
366 | case GEN_IPADD: |
367 | return nc_ip(gen->d.iPAddress, base->d.iPAddress); | |
368 | ||
e9746e03 DSH |
369 | default: |
370 | return X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE; | |
371 | } | |
372 | ||
373 | } | |
374 | ||
375 | /* directoryName name constraint matching. | |
376 | * The canonical encoding of X509_NAME makes this comparison easy. It is | |
377 | * matched if the subtree is a subset of the name. | |
378 | */ | |
379 | ||
380 | static int nc_dn(X509_NAME *nm, X509_NAME *base) | |
381 | { | |
8132d3ac DSH |
382 | /* Ensure canonical encodings are up to date. */ |
383 | if (nm->modified && i2d_X509_NAME(nm, NULL) < 0) | |
384 | return X509_V_ERR_OUT_OF_MEM; | |
385 | if (base->modified && i2d_X509_NAME(base, NULL) < 0) | |
386 | return X509_V_ERR_OUT_OF_MEM; | |
e9746e03 DSH |
387 | if (base->canon_enclen > nm->canon_enclen) |
388 | return X509_V_ERR_PERMITTED_VIOLATION; | |
389 | if (memcmp(base->canon_enc, nm->canon_enc, base->canon_enclen)) | |
390 | return X509_V_ERR_PERMITTED_VIOLATION; | |
391 | return X509_V_OK; | |
392 | } | |
393 | ||
394 | static int nc_dns(ASN1_IA5STRING *dns, ASN1_IA5STRING *base) | |
395 | { | |
396 | char *baseptr = (char *)base->data; | |
397 | char *dnsptr = (char *)dns->data; | |
398 | /* Empty matches everything */ | |
399 | if (!*baseptr) | |
400 | return X509_V_OK; | |
401 | /* Otherwise can add zero or more components on the left so | |
402 | * compare RHS and if dns is longer and expect '.' as preceding | |
403 | * character. | |
404 | */ | |
405 | if (dns->length > base->length) | |
406 | { | |
407 | dnsptr += dns->length - base->length; | |
408 | if (dnsptr[-1] != '.') | |
409 | return X509_V_ERR_PERMITTED_VIOLATION; | |
410 | } | |
411 | ||
412 | if (strcasecmp(baseptr, dnsptr)) | |
413 | return X509_V_ERR_PERMITTED_VIOLATION; | |
414 | ||
415 | return X509_V_OK; | |
416 | ||
417 | } | |
418 | ||
419 | static int nc_email(ASN1_IA5STRING *eml, ASN1_IA5STRING *base) | |
420 | { | |
421 | const char *baseptr = (char *)base->data; | |
422 | const char *emlptr = (char *)eml->data; | |
423 | ||
424 | const char *baseat = strchr(baseptr, '@'); | |
425 | const char *emlat = strchr(emlptr, '@'); | |
426 | if (!emlat) | |
427 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; | |
428 | /* Special case: inital '.' is RHS match */ | |
429 | if (!baseat && (*baseptr == '.')) | |
430 | { | |
431 | if (eml->length > base->length) | |
432 | { | |
433 | emlptr += eml->length - base->length; | |
434 | if (!strcasecmp(baseptr, emlptr)) | |
435 | return X509_V_OK; | |
436 | } | |
437 | return X509_V_ERR_PERMITTED_VIOLATION; | |
438 | } | |
439 | ||
440 | /* If we have anything before '@' match local part */ | |
441 | ||
442 | if (baseat) | |
443 | { | |
444 | if (baseat != baseptr) | |
445 | { | |
446 | if ((baseat - baseptr) != (emlat - emlptr)) | |
447 | return X509_V_ERR_PERMITTED_VIOLATION; | |
448 | /* Case sensitive match of local part */ | |
449 | if (strncmp(baseptr, emlptr, emlat - emlptr)) | |
450 | return X509_V_ERR_PERMITTED_VIOLATION; | |
451 | } | |
452 | /* Position base after '@' */ | |
453 | baseptr = baseat + 1; | |
454 | } | |
455 | emlptr = emlat + 1; | |
456 | /* Just have hostname left to match: case insensitive */ | |
457 | if (strcasecmp(baseptr, emlptr)) | |
458 | return X509_V_ERR_PERMITTED_VIOLATION; | |
459 | ||
460 | return X509_V_OK; | |
461 | ||
462 | } | |
463 | ||
464 | static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base) | |
465 | { | |
466 | const char *baseptr = (char *)base->data; | |
467 | const char *hostptr = (char *)uri->data; | |
468 | const char *p = strchr(hostptr, ':'); | |
fa0f834c | 469 | int hostlen; |
e9746e03 DSH |
470 | /* Check for foo:// and skip past it */ |
471 | if (!p || (p[1] != '/') || (p[2] != '/')) | |
472 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; | |
473 | hostptr = p + 3; | |
474 | ||
475 | /* Determine length of hostname part of URI */ | |
476 | ||
477 | /* Look for a port indicator as end of hostname first */ | |
478 | ||
479 | p = strchr(hostptr, ':'); | |
480 | /* Otherwise look for trailing slash */ | |
481 | if (!p) | |
482 | p = strchr(hostptr, '/'); | |
483 | ||
484 | if (!p) | |
485 | hostlen = strlen(hostptr); | |
486 | else | |
487 | hostlen = p - hostptr; | |
488 | ||
489 | if (hostlen == 0) | |
490 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; | |
491 | ||
492 | /* Special case: inital '.' is RHS match */ | |
493 | if (*baseptr == '.') | |
494 | { | |
495 | if (hostlen > base->length) | |
496 | { | |
497 | p = hostptr + hostlen - base->length; | |
498 | if (!strncasecmp(p, baseptr, base->length)) | |
499 | return X509_V_OK; | |
500 | } | |
501 | return X509_V_ERR_PERMITTED_VIOLATION; | |
502 | } | |
503 | ||
fa0f834c | 504 | if ((base->length != (int)hostlen) || strncasecmp(hostptr, baseptr, hostlen)) |
e9746e03 DSH |
505 | return X509_V_ERR_PERMITTED_VIOLATION; |
506 | ||
507 | return X509_V_OK; | |
508 | ||
509 | } | |
dd36fce0 LADL |
510 | |
511 | static int nc_ip(ASN1_OCTET_STRING *ip, ASN1_OCTET_STRING *base) | |
512 | { | |
513 | int hostlen, baselen, i; | |
514 | unsigned char *hostptr, *baseptr, *maskptr; | |
515 | hostptr = ip->data; | |
516 | hostlen = ip->length; | |
517 | baseptr = base->data; | |
518 | baselen = base->length; | |
519 | ||
520 | /* Invalid if not IPv4 or IPv6 */ | |
521 | if (! ((hostlen == 4) || (hostlen==16)) ) | |
522 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; | |
523 | if (! ((baselen == 8) || (baselen==32)) ) | |
524 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; | |
525 | ||
526 | /* Do not match IPv4 with IPv6 */ | |
527 | if (hostlen*2 != baselen) | |
528 | return X509_V_ERR_PERMITTED_VIOLATION; | |
529 | ||
530 | maskptr = base->data + hostlen; | |
531 | ||
532 | /* Considering possible not aligned base ipAddress */ | |
533 | /* Not checking for wrong mask definition: i.e.: 255.0.255.0*/ | |
534 | for (i = 0; i < hostlen; i++) | |
535 | if ((hostptr[i] & maskptr[i]) != (baseptr[i] & maskptr[i])) | |
536 | return X509_V_ERR_PERMITTED_VIOLATION; | |
537 | ||
538 | return X509_V_OK; | |
539 | ||
540 | } |