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Commit | Line | Data |
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0f113f3e | 1 | /* |
d2e9e320 | 2 | * Copyright 2003-2016 The OpenSSL Project Authors. All Rights Reserved. |
520b76ff | 3 | * |
d2e9e320 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
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 | |
520b76ff DSH |
8 | */ |
9 | ||
520b76ff | 10 | #include <stdio.h> |
b39fc560 | 11 | #include "internal/cryptlib.h" |
5bd5dcd4 | 12 | #include "internal/asn1_int.h" |
520b76ff DSH |
13 | #include <openssl/asn1t.h> |
14 | #include <openssl/conf.h> | |
15 | #include <openssl/x509v3.h> | |
16 | ||
2743e38c | 17 | #include "internal/x509_int.h" |
df2ee0e2 | 18 | #include "ext_dat.h" |
2743e38c | 19 | |
babb3798 | 20 | static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, |
0f113f3e MC |
21 | X509V3_CTX *ctx, |
22 | STACK_OF(CONF_VALUE) *nval); | |
23 | static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a, | |
24 | BIO *bp, int ind); | |
babb3798 | 25 | static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method, |
0f113f3e | 26 | STACK_OF(GENERAL_SUBTREE) *trees, BIO *bp, |
c8f717fe | 27 | int ind, const char *name); |
520b76ff DSH |
28 | static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip); |
29 | ||
e9746e03 DSH |
30 | static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc); |
31 | static int nc_match_single(GENERAL_NAME *sub, GENERAL_NAME *gen); | |
32 | static int nc_dn(X509_NAME *sub, X509_NAME *nm); | |
33 | static int nc_dns(ASN1_IA5STRING *sub, ASN1_IA5STRING *dns); | |
34 | static int nc_email(ASN1_IA5STRING *sub, ASN1_IA5STRING *eml); | |
35 | static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base); | |
dd36fce0 | 36 | static int nc_ip(ASN1_OCTET_STRING *ip, ASN1_OCTET_STRING *base); |
e9746e03 | 37 | |
560b79cb | 38 | const X509V3_EXT_METHOD v3_name_constraints = { |
0f113f3e MC |
39 | NID_name_constraints, 0, |
40 | ASN1_ITEM_ref(NAME_CONSTRAINTS), | |
41 | 0, 0, 0, 0, | |
42 | 0, 0, | |
43 | 0, v2i_NAME_CONSTRAINTS, | |
44 | i2r_NAME_CONSTRAINTS, 0, | |
45 | NULL | |
520b76ff DSH |
46 | }; |
47 | ||
48 | ASN1_SEQUENCE(GENERAL_SUBTREE) = { | |
0f113f3e MC |
49 | ASN1_SIMPLE(GENERAL_SUBTREE, base, GENERAL_NAME), |
50 | ASN1_IMP_OPT(GENERAL_SUBTREE, minimum, ASN1_INTEGER, 0), | |
51 | ASN1_IMP_OPT(GENERAL_SUBTREE, maximum, ASN1_INTEGER, 1) | |
520b76ff DSH |
52 | } ASN1_SEQUENCE_END(GENERAL_SUBTREE) |
53 | ||
54 | ASN1_SEQUENCE(NAME_CONSTRAINTS) = { | |
0f113f3e MC |
55 | ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, permittedSubtrees, |
56 | GENERAL_SUBTREE, 0), | |
57 | ASN1_IMP_SEQUENCE_OF_OPT(NAME_CONSTRAINTS, excludedSubtrees, | |
58 | GENERAL_SUBTREE, 1), | |
520b76ff | 59 | } ASN1_SEQUENCE_END(NAME_CONSTRAINTS) |
0f113f3e | 60 | |
520b76ff DSH |
61 | |
62 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(GENERAL_SUBTREE) | |
63 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(NAME_CONSTRAINTS) | |
64 | ||
babb3798 | 65 | static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, |
0f113f3e MC |
66 | X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval) |
67 | { | |
68 | int i; | |
69 | CONF_VALUE tval, *val; | |
70 | STACK_OF(GENERAL_SUBTREE) **ptree = NULL; | |
71 | NAME_CONSTRAINTS *ncons = NULL; | |
72 | GENERAL_SUBTREE *sub = NULL; | |
86885c28 | 73 | |
0f113f3e | 74 | ncons = NAME_CONSTRAINTS_new(); |
90945fa3 | 75 | if (ncons == NULL) |
0f113f3e MC |
76 | goto memerr; |
77 | for (i = 0; i < sk_CONF_VALUE_num(nval); i++) { | |
78 | val = sk_CONF_VALUE_value(nval, i); | |
86885c28 | 79 | if (strncmp(val->name, "permitted", 9) == 0 && val->name[9]) { |
0f113f3e MC |
80 | ptree = &ncons->permittedSubtrees; |
81 | tval.name = val->name + 10; | |
86885c28 | 82 | } else if (strncmp(val->name, "excluded", 8) == 0 && val->name[8]) { |
0f113f3e MC |
83 | ptree = &ncons->excludedSubtrees; |
84 | tval.name = val->name + 9; | |
85 | } else { | |
86 | X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS, X509V3_R_INVALID_SYNTAX); | |
87 | goto err; | |
88 | } | |
89 | tval.value = val->value; | |
90 | sub = GENERAL_SUBTREE_new(); | |
90945fa3 MC |
91 | if (sub == NULL) |
92 | goto memerr; | |
0f113f3e MC |
93 | if (!v2i_GENERAL_NAME_ex(sub->base, method, ctx, &tval, 1)) |
94 | goto err; | |
90945fa3 | 95 | if (*ptree == NULL) |
0f113f3e | 96 | *ptree = sk_GENERAL_SUBTREE_new_null(); |
90945fa3 | 97 | if (*ptree == NULL || !sk_GENERAL_SUBTREE_push(*ptree, sub)) |
0f113f3e MC |
98 | goto memerr; |
99 | sub = NULL; | |
100 | } | |
101 | ||
102 | return ncons; | |
103 | ||
104 | memerr: | |
105 | X509V3err(X509V3_F_V2I_NAME_CONSTRAINTS, ERR_R_MALLOC_FAILURE); | |
106 | err: | |
895cba19 RS |
107 | NAME_CONSTRAINTS_free(ncons); |
108 | GENERAL_SUBTREE_free(sub); | |
0f113f3e MC |
109 | |
110 | return NULL; | |
111 | } | |
520b76ff | 112 | |
babb3798 | 113 | static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a, |
0f113f3e MC |
114 | BIO *bp, int ind) |
115 | { | |
116 | NAME_CONSTRAINTS *ncons = a; | |
117 | do_i2r_name_constraints(method, ncons->permittedSubtrees, | |
118 | bp, ind, "Permitted"); | |
119 | do_i2r_name_constraints(method, ncons->excludedSubtrees, | |
120 | bp, ind, "Excluded"); | |
121 | return 1; | |
122 | } | |
520b76ff | 123 | |
babb3798 | 124 | static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method, |
0f113f3e | 125 | STACK_OF(GENERAL_SUBTREE) *trees, |
c8f717fe | 126 | BIO *bp, int ind, const char *name) |
0f113f3e MC |
127 | { |
128 | GENERAL_SUBTREE *tree; | |
129 | int i; | |
130 | if (sk_GENERAL_SUBTREE_num(trees) > 0) | |
131 | BIO_printf(bp, "%*s%s:\n", ind, "", name); | |
132 | for (i = 0; i < sk_GENERAL_SUBTREE_num(trees); i++) { | |
133 | tree = sk_GENERAL_SUBTREE_value(trees, i); | |
134 | BIO_printf(bp, "%*s", ind + 2, ""); | |
135 | if (tree->base->type == GEN_IPADD) | |
136 | print_nc_ipadd(bp, tree->base->d.ip); | |
137 | else | |
138 | GENERAL_NAME_print(bp, tree->base); | |
139 | BIO_puts(bp, "\n"); | |
140 | } | |
141 | return 1; | |
142 | } | |
520b76ff DSH |
143 | |
144 | static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip) | |
0f113f3e MC |
145 | { |
146 | int i, len; | |
147 | unsigned char *p; | |
148 | p = ip->data; | |
149 | len = ip->length; | |
150 | BIO_puts(bp, "IP:"); | |
151 | if (len == 8) { | |
152 | BIO_printf(bp, "%d.%d.%d.%d/%d.%d.%d.%d", | |
153 | p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]); | |
154 | } else if (len == 32) { | |
155 | for (i = 0; i < 16; i++) { | |
156 | BIO_printf(bp, "%X", p[0] << 8 | p[1]); | |
157 | p += 2; | |
158 | if (i == 7) | |
159 | BIO_puts(bp, "/"); | |
160 | else if (i != 15) | |
161 | BIO_puts(bp, ":"); | |
162 | } | |
163 | } else | |
164 | BIO_printf(bp, "IP Address:<invalid>"); | |
165 | return 1; | |
166 | } | |
520b76ff | 167 | |
1d97c843 TH |
168 | /*- |
169 | * Check a certificate conforms to a specified set of constraints. | |
e9746e03 DSH |
170 | * Return values: |
171 | * X509_V_OK: All constraints obeyed. | |
172 | * X509_V_ERR_PERMITTED_VIOLATION: Permitted subtree violation. | |
173 | * X509_V_ERR_EXCLUDED_VIOLATION: Excluded subtree violation. | |
174 | * X509_V_ERR_SUBTREE_MINMAX: Min or max values present and matching type. | |
175 | * X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE: Unsupported constraint type. | |
176 | * X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: bad unsupported constraint syntax. | |
177 | * X509_V_ERR_UNSUPPORTED_NAME_SYNTAX: bad or unsupported syntax of name | |
e9746e03 DSH |
178 | */ |
179 | ||
180 | int NAME_CONSTRAINTS_check(X509 *x, NAME_CONSTRAINTS *nc) | |
0f113f3e MC |
181 | { |
182 | int r, i; | |
183 | X509_NAME *nm; | |
e9746e03 | 184 | |
0f113f3e | 185 | nm = X509_get_subject_name(x); |
e9746e03 | 186 | |
0f113f3e MC |
187 | if (X509_NAME_entry_count(nm) > 0) { |
188 | GENERAL_NAME gntmp; | |
189 | gntmp.type = GEN_DIRNAME; | |
190 | gntmp.d.directoryName = nm; | |
e9746e03 | 191 | |
0f113f3e | 192 | r = nc_match(&gntmp, nc); |
e9746e03 | 193 | |
0f113f3e MC |
194 | if (r != X509_V_OK) |
195 | return r; | |
e9746e03 | 196 | |
0f113f3e | 197 | gntmp.type = GEN_EMAIL; |
e9746e03 | 198 | |
0f113f3e | 199 | /* Process any email address attributes in subject name */ |
e9746e03 | 200 | |
0f113f3e MC |
201 | for (i = -1;;) { |
202 | X509_NAME_ENTRY *ne; | |
203 | i = X509_NAME_get_index_by_NID(nm, NID_pkcs9_emailAddress, i); | |
204 | if (i == -1) | |
205 | break; | |
206 | ne = X509_NAME_get_entry(nm, i); | |
207 | gntmp.d.rfc822Name = X509_NAME_ENTRY_get_data(ne); | |
208 | if (gntmp.d.rfc822Name->type != V_ASN1_IA5STRING) | |
209 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; | |
e9746e03 | 210 | |
0f113f3e | 211 | r = nc_match(&gntmp, nc); |
e9746e03 | 212 | |
0f113f3e MC |
213 | if (r != X509_V_OK) |
214 | return r; | |
215 | } | |
e9746e03 | 216 | |
0f113f3e | 217 | } |
e9746e03 | 218 | |
0f113f3e MC |
219 | for (i = 0; i < sk_GENERAL_NAME_num(x->altname); i++) { |
220 | GENERAL_NAME *gen = sk_GENERAL_NAME_value(x->altname, i); | |
221 | r = nc_match(gen, nc); | |
222 | if (r != X509_V_OK) | |
223 | return r; | |
224 | } | |
e9746e03 | 225 | |
0f113f3e | 226 | return X509_V_OK; |
e9746e03 | 227 | |
0f113f3e | 228 | } |
e9746e03 | 229 | |
5bd5dcd4 DSH |
230 | int NAME_CONSTRAINTS_check_CN(X509 *x, NAME_CONSTRAINTS *nc) |
231 | { | |
232 | int r, i; | |
233 | X509_NAME *nm; | |
234 | ||
235 | ASN1_STRING stmp; | |
236 | GENERAL_NAME gntmp; | |
237 | stmp.flags = 0; | |
238 | stmp.type = V_ASN1_IA5STRING; | |
239 | gntmp.type = GEN_DNS; | |
240 | gntmp.d.dNSName = &stmp; | |
241 | ||
242 | nm = X509_get_subject_name(x); | |
243 | ||
244 | /* Process any commonName attributes in subject name */ | |
245 | ||
246 | for (i = -1;;) { | |
247 | X509_NAME_ENTRY *ne; | |
248 | ASN1_STRING *hn; | |
249 | i = X509_NAME_get_index_by_NID(nm, NID_commonName, i); | |
250 | if (i == -1) | |
251 | break; | |
252 | ne = X509_NAME_get_entry(nm, i); | |
253 | hn = X509_NAME_ENTRY_get_data(ne); | |
254 | /* Only process attributes that look like host names */ | |
255 | if (asn1_valid_host(hn)) { | |
256 | unsigned char *h; | |
257 | int hlen = ASN1_STRING_to_UTF8(&h, hn); | |
258 | if (hlen <= 0) | |
259 | return X509_V_ERR_OUT_OF_MEM; | |
260 | ||
261 | stmp.length = hlen; | |
262 | stmp.data = h; | |
263 | ||
264 | r = nc_match(&gntmp, nc); | |
265 | ||
266 | OPENSSL_free(h); | |
267 | ||
268 | if (r != X509_V_OK) | |
269 | return r; | |
270 | } | |
271 | } | |
272 | return X509_V_OK; | |
273 | } | |
274 | ||
e9746e03 | 275 | static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc) |
0f113f3e MC |
276 | { |
277 | GENERAL_SUBTREE *sub; | |
278 | int i, r, match = 0; | |
279 | ||
280 | /* | |
281 | * Permitted subtrees: if any subtrees exist of matching the type at | |
282 | * least one subtree must match. | |
283 | */ | |
284 | ||
285 | for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->permittedSubtrees); i++) { | |
286 | sub = sk_GENERAL_SUBTREE_value(nc->permittedSubtrees, i); | |
287 | if (gen->type != sub->base->type) | |
288 | continue; | |
289 | if (sub->minimum || sub->maximum) | |
290 | return X509_V_ERR_SUBTREE_MINMAX; | |
291 | /* If we already have a match don't bother trying any more */ | |
292 | if (match == 2) | |
293 | continue; | |
294 | if (match == 0) | |
295 | match = 1; | |
296 | r = nc_match_single(gen, sub->base); | |
297 | if (r == X509_V_OK) | |
298 | match = 2; | |
299 | else if (r != X509_V_ERR_PERMITTED_VIOLATION) | |
300 | return r; | |
301 | } | |
302 | ||
303 | if (match == 1) | |
304 | return X509_V_ERR_PERMITTED_VIOLATION; | |
305 | ||
306 | /* Excluded subtrees: must not match any of these */ | |
307 | ||
308 | for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->excludedSubtrees); i++) { | |
309 | sub = sk_GENERAL_SUBTREE_value(nc->excludedSubtrees, i); | |
310 | if (gen->type != sub->base->type) | |
311 | continue; | |
312 | if (sub->minimum || sub->maximum) | |
313 | return X509_V_ERR_SUBTREE_MINMAX; | |
314 | ||
315 | r = nc_match_single(gen, sub->base); | |
316 | if (r == X509_V_OK) | |
317 | return X509_V_ERR_EXCLUDED_VIOLATION; | |
318 | else if (r != X509_V_ERR_PERMITTED_VIOLATION) | |
319 | return r; | |
320 | ||
321 | } | |
322 | ||
323 | return X509_V_OK; | |
324 | ||
325 | } | |
e9746e03 DSH |
326 | |
327 | static int nc_match_single(GENERAL_NAME *gen, GENERAL_NAME *base) | |
0f113f3e MC |
328 | { |
329 | switch (base->type) { | |
330 | case GEN_DIRNAME: | |
331 | return nc_dn(gen->d.directoryName, base->d.directoryName); | |
e9746e03 | 332 | |
0f113f3e MC |
333 | case GEN_DNS: |
334 | return nc_dns(gen->d.dNSName, base->d.dNSName); | |
e9746e03 | 335 | |
0f113f3e MC |
336 | case GEN_EMAIL: |
337 | return nc_email(gen->d.rfc822Name, base->d.rfc822Name); | |
e9746e03 | 338 | |
0f113f3e MC |
339 | case GEN_URI: |
340 | return nc_uri(gen->d.uniformResourceIdentifier, | |
341 | base->d.uniformResourceIdentifier); | |
e9746e03 | 342 | |
0f113f3e MC |
343 | case GEN_IPADD: |
344 | return nc_ip(gen->d.iPAddress, base->d.iPAddress); | |
dd36fce0 | 345 | |
0f113f3e MC |
346 | default: |
347 | return X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE; | |
348 | } | |
e9746e03 | 349 | |
0f113f3e | 350 | } |
e9746e03 | 351 | |
0f113f3e MC |
352 | /* |
353 | * directoryName name constraint matching. The canonical encoding of | |
354 | * X509_NAME makes this comparison easy. It is matched if the subtree is a | |
355 | * subset of the name. | |
e9746e03 DSH |
356 | */ |
357 | ||
358 | static int nc_dn(X509_NAME *nm, X509_NAME *base) | |
0f113f3e MC |
359 | { |
360 | /* Ensure canonical encodings are up to date. */ | |
361 | if (nm->modified && i2d_X509_NAME(nm, NULL) < 0) | |
362 | return X509_V_ERR_OUT_OF_MEM; | |
363 | if (base->modified && i2d_X509_NAME(base, NULL) < 0) | |
364 | return X509_V_ERR_OUT_OF_MEM; | |
365 | if (base->canon_enclen > nm->canon_enclen) | |
366 | return X509_V_ERR_PERMITTED_VIOLATION; | |
367 | if (memcmp(base->canon_enc, nm->canon_enc, base->canon_enclen)) | |
368 | return X509_V_ERR_PERMITTED_VIOLATION; | |
369 | return X509_V_OK; | |
370 | } | |
e9746e03 DSH |
371 | |
372 | static int nc_dns(ASN1_IA5STRING *dns, ASN1_IA5STRING *base) | |
0f113f3e MC |
373 | { |
374 | char *baseptr = (char *)base->data; | |
375 | char *dnsptr = (char *)dns->data; | |
376 | /* Empty matches everything */ | |
377 | if (!*baseptr) | |
378 | return X509_V_OK; | |
379 | /* | |
380 | * Otherwise can add zero or more components on the left so compare RHS | |
381 | * and if dns is longer and expect '.' as preceding character. | |
382 | */ | |
383 | if (dns->length > base->length) { | |
384 | dnsptr += dns->length - base->length; | |
385 | if (*baseptr != '.' && dnsptr[-1] != '.') | |
386 | return X509_V_ERR_PERMITTED_VIOLATION; | |
387 | } | |
388 | ||
389 | if (strcasecmp(baseptr, dnsptr)) | |
390 | return X509_V_ERR_PERMITTED_VIOLATION; | |
391 | ||
392 | return X509_V_OK; | |
393 | ||
394 | } | |
e9746e03 DSH |
395 | |
396 | static int nc_email(ASN1_IA5STRING *eml, ASN1_IA5STRING *base) | |
0f113f3e MC |
397 | { |
398 | const char *baseptr = (char *)base->data; | |
399 | const char *emlptr = (char *)eml->data; | |
400 | ||
401 | const char *baseat = strchr(baseptr, '@'); | |
402 | const char *emlat = strchr(emlptr, '@'); | |
403 | if (!emlat) | |
404 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; | |
0d4fb843 | 405 | /* Special case: initial '.' is RHS match */ |
0f113f3e MC |
406 | if (!baseat && (*baseptr == '.')) { |
407 | if (eml->length > base->length) { | |
408 | emlptr += eml->length - base->length; | |
86885c28 | 409 | if (strcasecmp(baseptr, emlptr) == 0) |
0f113f3e MC |
410 | return X509_V_OK; |
411 | } | |
412 | return X509_V_ERR_PERMITTED_VIOLATION; | |
413 | } | |
414 | ||
415 | /* If we have anything before '@' match local part */ | |
416 | ||
417 | if (baseat) { | |
418 | if (baseat != baseptr) { | |
419 | if ((baseat - baseptr) != (emlat - emlptr)) | |
420 | return X509_V_ERR_PERMITTED_VIOLATION; | |
421 | /* Case sensitive match of local part */ | |
422 | if (strncmp(baseptr, emlptr, emlat - emlptr)) | |
423 | return X509_V_ERR_PERMITTED_VIOLATION; | |
424 | } | |
425 | /* Position base after '@' */ | |
426 | baseptr = baseat + 1; | |
427 | } | |
428 | emlptr = emlat + 1; | |
429 | /* Just have hostname left to match: case insensitive */ | |
430 | if (strcasecmp(baseptr, emlptr)) | |
431 | return X509_V_ERR_PERMITTED_VIOLATION; | |
432 | ||
433 | return X509_V_OK; | |
434 | ||
435 | } | |
e9746e03 DSH |
436 | |
437 | static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base) | |
0f113f3e MC |
438 | { |
439 | const char *baseptr = (char *)base->data; | |
440 | const char *hostptr = (char *)uri->data; | |
441 | const char *p = strchr(hostptr, ':'); | |
442 | int hostlen; | |
443 | /* Check for foo:// and skip past it */ | |
444 | if (!p || (p[1] != '/') || (p[2] != '/')) | |
445 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; | |
446 | hostptr = p + 3; | |
447 | ||
448 | /* Determine length of hostname part of URI */ | |
449 | ||
450 | /* Look for a port indicator as end of hostname first */ | |
451 | ||
452 | p = strchr(hostptr, ':'); | |
453 | /* Otherwise look for trailing slash */ | |
454 | if (!p) | |
455 | p = strchr(hostptr, '/'); | |
456 | ||
457 | if (!p) | |
458 | hostlen = strlen(hostptr); | |
459 | else | |
460 | hostlen = p - hostptr; | |
461 | ||
462 | if (hostlen == 0) | |
463 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; | |
464 | ||
0d4fb843 | 465 | /* Special case: initial '.' is RHS match */ |
0f113f3e MC |
466 | if (*baseptr == '.') { |
467 | if (hostlen > base->length) { | |
468 | p = hostptr + hostlen - base->length; | |
86885c28 | 469 | if (strncasecmp(p, baseptr, base->length) == 0) |
0f113f3e MC |
470 | return X509_V_OK; |
471 | } | |
472 | return X509_V_ERR_PERMITTED_VIOLATION; | |
473 | } | |
474 | ||
475 | if ((base->length != (int)hostlen) | |
476 | || strncasecmp(hostptr, baseptr, hostlen)) | |
477 | return X509_V_ERR_PERMITTED_VIOLATION; | |
478 | ||
479 | return X509_V_OK; | |
480 | ||
481 | } | |
dd36fce0 LADL |
482 | |
483 | static int nc_ip(ASN1_OCTET_STRING *ip, ASN1_OCTET_STRING *base) | |
0f113f3e MC |
484 | { |
485 | int hostlen, baselen, i; | |
486 | unsigned char *hostptr, *baseptr, *maskptr; | |
487 | hostptr = ip->data; | |
488 | hostlen = ip->length; | |
489 | baseptr = base->data; | |
490 | baselen = base->length; | |
491 | ||
492 | /* Invalid if not IPv4 or IPv6 */ | |
493 | if (!((hostlen == 4) || (hostlen == 16))) | |
494 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; | |
495 | if (!((baselen == 8) || (baselen == 32))) | |
496 | return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; | |
497 | ||
498 | /* Do not match IPv4 with IPv6 */ | |
499 | if (hostlen * 2 != baselen) | |
500 | return X509_V_ERR_PERMITTED_VIOLATION; | |
501 | ||
502 | maskptr = base->data + hostlen; | |
503 | ||
504 | /* Considering possible not aligned base ipAddress */ | |
505 | /* Not checking for wrong mask definition: i.e.: 255.0.255.0 */ | |
506 | for (i = 0; i < hostlen; i++) | |
507 | if ((hostptr[i] & maskptr[i]) != (baseptr[i] & maskptr[i])) | |
508 | return X509_V_ERR_PERMITTED_VIOLATION; | |
509 | ||
510 | return X509_V_OK; | |
511 | ||
512 | } |