source: EcnlProtoTool/trunk/openssl-1.1.0e/crypto/x509v3/v3_ncons.c@ 331

Last change on this file since 331 was 331, checked in by coas-nagasima, 6 years ago

prototoolに関連するプロジェクトをnewlibからmuslを使うよう変更・更新
ntshellをnewlibの下位の実装から、muslのsyscallの実装に変更・更新
以下のOSSをアップデート
・mruby-1.3.0
・musl-1.1.18
・onigmo-6.1.3
・tcc-0.9.27
以下のOSSを追加
・openssl-1.1.0e
・curl-7.57.0
・zlib-1.2.11
以下のmrbgemsを追加
・iij/mruby-digest
・iij/mruby-env
・iij/mruby-errno
・iij/mruby-iijson
・iij/mruby-ipaddr
・iij/mruby-mock
・iij/mruby-require
・iij/mruby-tls-openssl
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc
File size: 15.3 KB
Line 
1/*
2 * Copyright 2003-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10#include <stdio.h>
11#include "internal/cryptlib.h"
12#include "internal/asn1_int.h"
13#include <openssl/asn1t.h>
14#include <openssl/conf.h>
15#include <openssl/x509v3.h>
16
17#include "internal/x509_int.h"
18#include "ext_dat.h"
19
20static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
21 X509V3_CTX *ctx,
22 STACK_OF(CONF_VALUE) *nval);
23static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a,
24 BIO *bp, int ind);
25static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
26 STACK_OF(GENERAL_SUBTREE) *trees, BIO *bp,
27 int ind, const char *name);
28static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip);
29
30static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc);
31static int nc_match_single(GENERAL_NAME *sub, GENERAL_NAME *gen);
32static int nc_dn(X509_NAME *sub, X509_NAME *nm);
33static int nc_dns(ASN1_IA5STRING *sub, ASN1_IA5STRING *dns);
34static int nc_email(ASN1_IA5STRING *sub, ASN1_IA5STRING *eml);
35static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base);
36static int nc_ip(ASN1_OCTET_STRING *ip, ASN1_OCTET_STRING *base);
37
38const X509V3_EXT_METHOD v3_name_constraints = {
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
46};
47
48ASN1_SEQUENCE(GENERAL_SUBTREE) = {
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)
52} ASN1_SEQUENCE_END(GENERAL_SUBTREE)
53
54ASN1_SEQUENCE(NAME_CONSTRAINTS) = {
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),
59} ASN1_SEQUENCE_END(NAME_CONSTRAINTS)
60
61
62IMPLEMENT_ASN1_ALLOC_FUNCTIONS(GENERAL_SUBTREE)
63IMPLEMENT_ASN1_ALLOC_FUNCTIONS(NAME_CONSTRAINTS)
64
65static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method,
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;
73
74 ncons = NAME_CONSTRAINTS_new();
75 if (ncons == NULL)
76 goto memerr;
77 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
78 val = sk_CONF_VALUE_value(nval, i);
79 if (strncmp(val->name, "permitted", 9) == 0 && val->name[9]) {
80 ptree = &ncons->permittedSubtrees;
81 tval.name = val->name + 10;
82 } else if (strncmp(val->name, "excluded", 8) == 0 && val->name[8]) {
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();
91 if (sub == NULL)
92 goto memerr;
93 if (!v2i_GENERAL_NAME_ex(sub->base, method, ctx, &tval, 1))
94 goto err;
95 if (*ptree == NULL)
96 *ptree = sk_GENERAL_SUBTREE_new_null();
97 if (*ptree == NULL || !sk_GENERAL_SUBTREE_push(*ptree, sub))
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:
107 NAME_CONSTRAINTS_free(ncons);
108 GENERAL_SUBTREE_free(sub);
109
110 return NULL;
111}
112
113static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a,
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}
123
124static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method,
125 STACK_OF(GENERAL_SUBTREE) *trees,
126 BIO *bp, int ind, const char *name)
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}
143
144static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip)
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}
167
168/*-
169 * Check a certificate conforms to a specified set of constraints.
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
178 */
179
180int NAME_CONSTRAINTS_check(X509 *x, NAME_CONSTRAINTS *nc)
181{
182 int r, i;
183 X509_NAME *nm;
184
185 nm = X509_get_subject_name(x);
186
187 if (X509_NAME_entry_count(nm) > 0) {
188 GENERAL_NAME gntmp;
189 gntmp.type = GEN_DIRNAME;
190 gntmp.d.directoryName = nm;
191
192 r = nc_match(&gntmp, nc);
193
194 if (r != X509_V_OK)
195 return r;
196
197 gntmp.type = GEN_EMAIL;
198
199 /* Process any email address attributes in subject name */
200
201 for (i = -1;;) {
202 const X509_NAME_ENTRY *ne;
203
204 i = X509_NAME_get_index_by_NID(nm, NID_pkcs9_emailAddress, i);
205 if (i == -1)
206 break;
207 ne = X509_NAME_get_entry(nm, i);
208 gntmp.d.rfc822Name = X509_NAME_ENTRY_get_data(ne);
209 if (gntmp.d.rfc822Name->type != V_ASN1_IA5STRING)
210 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
211
212 r = nc_match(&gntmp, nc);
213
214 if (r != X509_V_OK)
215 return r;
216 }
217
218 }
219
220 for (i = 0; i < sk_GENERAL_NAME_num(x->altname); i++) {
221 GENERAL_NAME *gen = sk_GENERAL_NAME_value(x->altname, i);
222 r = nc_match(gen, nc);
223 if (r != X509_V_OK)
224 return r;
225 }
226
227 return X509_V_OK;
228
229}
230
231int NAME_CONSTRAINTS_check_CN(X509 *x, NAME_CONSTRAINTS *nc)
232{
233 int r, i;
234 X509_NAME *nm;
235
236 ASN1_STRING stmp;
237 GENERAL_NAME gntmp;
238 stmp.flags = 0;
239 stmp.type = V_ASN1_IA5STRING;
240 gntmp.type = GEN_DNS;
241 gntmp.d.dNSName = &stmp;
242
243 nm = X509_get_subject_name(x);
244
245 /* Process any commonName attributes in subject name */
246
247 for (i = -1;;) {
248 X509_NAME_ENTRY *ne;
249 ASN1_STRING *hn;
250 i = X509_NAME_get_index_by_NID(nm, NID_commonName, i);
251 if (i == -1)
252 break;
253 ne = X509_NAME_get_entry(nm, i);
254 hn = X509_NAME_ENTRY_get_data(ne);
255 /* Only process attributes that look like host names */
256 if (asn1_valid_host(hn)) {
257 unsigned char *h;
258 int hlen = ASN1_STRING_to_UTF8(&h, hn);
259 if (hlen <= 0)
260 return X509_V_ERR_OUT_OF_MEM;
261
262 stmp.length = hlen;
263 stmp.data = h;
264
265 r = nc_match(&gntmp, nc);
266
267 OPENSSL_free(h);
268
269 if (r != X509_V_OK)
270 return r;
271 }
272 }
273 return X509_V_OK;
274}
275
276static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc)
277{
278 GENERAL_SUBTREE *sub;
279 int i, r, match = 0;
280
281 /*
282 * Permitted subtrees: if any subtrees exist of matching the type at
283 * least one subtree must match.
284 */
285
286 for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->permittedSubtrees); i++) {
287 sub = sk_GENERAL_SUBTREE_value(nc->permittedSubtrees, i);
288 if (gen->type != sub->base->type)
289 continue;
290 if (sub->minimum || sub->maximum)
291 return X509_V_ERR_SUBTREE_MINMAX;
292 /* If we already have a match don't bother trying any more */
293 if (match == 2)
294 continue;
295 if (match == 0)
296 match = 1;
297 r = nc_match_single(gen, sub->base);
298 if (r == X509_V_OK)
299 match = 2;
300 else if (r != X509_V_ERR_PERMITTED_VIOLATION)
301 return r;
302 }
303
304 if (match == 1)
305 return X509_V_ERR_PERMITTED_VIOLATION;
306
307 /* Excluded subtrees: must not match any of these */
308
309 for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->excludedSubtrees); i++) {
310 sub = sk_GENERAL_SUBTREE_value(nc->excludedSubtrees, i);
311 if (gen->type != sub->base->type)
312 continue;
313 if (sub->minimum || sub->maximum)
314 return X509_V_ERR_SUBTREE_MINMAX;
315
316 r = nc_match_single(gen, sub->base);
317 if (r == X509_V_OK)
318 return X509_V_ERR_EXCLUDED_VIOLATION;
319 else if (r != X509_V_ERR_PERMITTED_VIOLATION)
320 return r;
321
322 }
323
324 return X509_V_OK;
325
326}
327
328static int nc_match_single(GENERAL_NAME *gen, GENERAL_NAME *base)
329{
330 switch (base->type) {
331 case GEN_DIRNAME:
332 return nc_dn(gen->d.directoryName, base->d.directoryName);
333
334 case GEN_DNS:
335 return nc_dns(gen->d.dNSName, base->d.dNSName);
336
337 case GEN_EMAIL:
338 return nc_email(gen->d.rfc822Name, base->d.rfc822Name);
339
340 case GEN_URI:
341 return nc_uri(gen->d.uniformResourceIdentifier,
342 base->d.uniformResourceIdentifier);
343
344 case GEN_IPADD:
345 return nc_ip(gen->d.iPAddress, base->d.iPAddress);
346
347 default:
348 return X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE;
349 }
350
351}
352
353/*
354 * directoryName name constraint matching. The canonical encoding of
355 * X509_NAME makes this comparison easy. It is matched if the subtree is a
356 * subset of the name.
357 */
358
359static int nc_dn(X509_NAME *nm, X509_NAME *base)
360{
361 /* Ensure canonical encodings are up to date. */
362 if (nm->modified && i2d_X509_NAME(nm, NULL) < 0)
363 return X509_V_ERR_OUT_OF_MEM;
364 if (base->modified && i2d_X509_NAME(base, NULL) < 0)
365 return X509_V_ERR_OUT_OF_MEM;
366 if (base->canon_enclen > nm->canon_enclen)
367 return X509_V_ERR_PERMITTED_VIOLATION;
368 if (memcmp(base->canon_enc, nm->canon_enc, base->canon_enclen))
369 return X509_V_ERR_PERMITTED_VIOLATION;
370 return X509_V_OK;
371}
372
373static int nc_dns(ASN1_IA5STRING *dns, ASN1_IA5STRING *base)
374{
375 char *baseptr = (char *)base->data;
376 char *dnsptr = (char *)dns->data;
377 /* Empty matches everything */
378 if (!*baseptr)
379 return X509_V_OK;
380 /*
381 * Otherwise can add zero or more components on the left so compare RHS
382 * and if dns is longer and expect '.' as preceding character.
383 */
384 if (dns->length > base->length) {
385 dnsptr += dns->length - base->length;
386 if (*baseptr != '.' && dnsptr[-1] != '.')
387 return X509_V_ERR_PERMITTED_VIOLATION;
388 }
389
390 if (strcasecmp(baseptr, dnsptr))
391 return X509_V_ERR_PERMITTED_VIOLATION;
392
393 return X509_V_OK;
394
395}
396
397static int nc_email(ASN1_IA5STRING *eml, ASN1_IA5STRING *base)
398{
399 const char *baseptr = (char *)base->data;
400 const char *emlptr = (char *)eml->data;
401
402 const char *baseat = strchr(baseptr, '@');
403 const char *emlat = strchr(emlptr, '@');
404 if (!emlat)
405 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
406 /* Special case: initial '.' is RHS match */
407 if (!baseat && (*baseptr == '.')) {
408 if (eml->length > base->length) {
409 emlptr += eml->length - base->length;
410 if (strcasecmp(baseptr, emlptr) == 0)
411 return X509_V_OK;
412 }
413 return X509_V_ERR_PERMITTED_VIOLATION;
414 }
415
416 /* If we have anything before '@' match local part */
417
418 if (baseat) {
419 if (baseat != baseptr) {
420 if ((baseat - baseptr) != (emlat - emlptr))
421 return X509_V_ERR_PERMITTED_VIOLATION;
422 /* Case sensitive match of local part */
423 if (strncmp(baseptr, emlptr, emlat - emlptr))
424 return X509_V_ERR_PERMITTED_VIOLATION;
425 }
426 /* Position base after '@' */
427 baseptr = baseat + 1;
428 }
429 emlptr = emlat + 1;
430 /* Just have hostname left to match: case insensitive */
431 if (strcasecmp(baseptr, emlptr))
432 return X509_V_ERR_PERMITTED_VIOLATION;
433
434 return X509_V_OK;
435
436}
437
438static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base)
439{
440 const char *baseptr = (char *)base->data;
441 const char *hostptr = (char *)uri->data;
442 const char *p = strchr(hostptr, ':');
443 int hostlen;
444 /* Check for foo:// and skip past it */
445 if (!p || (p[1] != '/') || (p[2] != '/'))
446 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
447 hostptr = p + 3;
448
449 /* Determine length of hostname part of URI */
450
451 /* Look for a port indicator as end of hostname first */
452
453 p = strchr(hostptr, ':');
454 /* Otherwise look for trailing slash */
455 if (!p)
456 p = strchr(hostptr, '/');
457
458 if (!p)
459 hostlen = strlen(hostptr);
460 else
461 hostlen = p - hostptr;
462
463 if (hostlen == 0)
464 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
465
466 /* Special case: initial '.' is RHS match */
467 if (*baseptr == '.') {
468 if (hostlen > base->length) {
469 p = hostptr + hostlen - base->length;
470 if (strncasecmp(p, baseptr, base->length) == 0)
471 return X509_V_OK;
472 }
473 return X509_V_ERR_PERMITTED_VIOLATION;
474 }
475
476 if ((base->length != (int)hostlen)
477 || strncasecmp(hostptr, baseptr, hostlen))
478 return X509_V_ERR_PERMITTED_VIOLATION;
479
480 return X509_V_OK;
481
482}
483
484static int nc_ip(ASN1_OCTET_STRING *ip, ASN1_OCTET_STRING *base)
485{
486 int hostlen, baselen, i;
487 unsigned char *hostptr, *baseptr, *maskptr;
488 hostptr = ip->data;
489 hostlen = ip->length;
490 baseptr = base->data;
491 baselen = base->length;
492
493 /* Invalid if not IPv4 or IPv6 */
494 if (!((hostlen == 4) || (hostlen == 16)))
495 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
496 if (!((baselen == 8) || (baselen == 32)))
497 return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
498
499 /* Do not match IPv4 with IPv6 */
500 if (hostlen * 2 != baselen)
501 return X509_V_ERR_PERMITTED_VIOLATION;
502
503 maskptr = base->data + hostlen;
504
505 /* Considering possible not aligned base ipAddress */
506 /* Not checking for wrong mask definition: i.e.: 255.0.255.0 */
507 for (i = 0; i < hostlen; i++)
508 if ((hostptr[i] & maskptr[i]) != (baseptr[i] & maskptr[i]))
509 return X509_V_ERR_PERMITTED_VIOLATION;
510
511 return X509_V_OK;
512
513}
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