1 /*
2 * Copyright 1999-2022 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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 /* X509 v3 extension utilities */
11
12 #include "e_os.h"
13 #include "internal/cryptlib.h"
14 #include <stdio.h>
15 #include <string.h>
16 #include "crypto/ctype.h"
17 #include <openssl/conf.h>
18 #include <openssl/crypto.h>
19 #include <openssl/x509v3.h>
20 #include "crypto/x509.h"
21 #include <openssl/bn.h>
22 #include "ext_dat.h"
23 #include "x509_local.h"
24
25 static char *strip_spaces(char *name);
26 static int sk_strcmp(const char *const *a, const char *const *b);
27 static STACK_OF(OPENSSL_STRING) *get_email(const X509_NAME *name,
28 GENERAL_NAMES *gens);
29 static void str_free(OPENSSL_STRING str);
30 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk,
31 const ASN1_IA5STRING *email);
32
33 static int ipv4_from_asc(unsigned char *v4, const char *in);
34 static int ipv6_from_asc(unsigned char *v6, const char *in);
35 static int ipv6_cb(const char *elem, int len, void *usr);
36 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
37
38 /* Add a CONF_VALUE name value pair to stack */
39
x509v3_add_len_value(const char * name,const char * value,size_t vallen,STACK_OF (CONF_VALUE)** extlist)40 static int x509v3_add_len_value(const char *name, const char *value,
41 size_t vallen, STACK_OF(CONF_VALUE) **extlist)
42 {
43 CONF_VALUE *vtmp = NULL;
44 char *tname = NULL, *tvalue = NULL;
45 int sk_allocated = (*extlist == NULL);
46
47 if (name != NULL && (tname = OPENSSL_strdup(name)) == NULL)
48 goto err;
49 if (value != NULL) {
50 /* We don't allow embeded NUL characters */
51 if (memchr(value, 0, vallen) != NULL)
52 goto err;
53 tvalue = OPENSSL_strndup(value, vallen);
54 if (tvalue == NULL)
55 goto err;
56 }
57 if ((vtmp = OPENSSL_malloc(sizeof(*vtmp))) == NULL)
58 goto err;
59 if (sk_allocated && (*extlist = sk_CONF_VALUE_new_null()) == NULL)
60 goto err;
61 vtmp->section = NULL;
62 vtmp->name = tname;
63 vtmp->value = tvalue;
64 if (!sk_CONF_VALUE_push(*extlist, vtmp))
65 goto err;
66 return 1;
67 err:
68 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
69 if (sk_allocated) {
70 sk_CONF_VALUE_free(*extlist);
71 *extlist = NULL;
72 }
73 OPENSSL_free(vtmp);
74 OPENSSL_free(tname);
75 OPENSSL_free(tvalue);
76 return 0;
77 }
78
X509V3_add_value(const char * name,const char * value,STACK_OF (CONF_VALUE)** extlist)79 int X509V3_add_value(const char *name, const char *value,
80 STACK_OF(CONF_VALUE) **extlist)
81 {
82 return x509v3_add_len_value(name, value,
83 value != NULL ? strlen((const char *)value) : 0,
84 extlist);
85 }
86
X509V3_add_value_uchar(const char * name,const unsigned char * value,STACK_OF (CONF_VALUE)** extlist)87 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
88 STACK_OF(CONF_VALUE) **extlist)
89 {
90 return x509v3_add_len_value(name, (const char *)value,
91 value != NULL ? strlen((const char *)value) : 0,
92 extlist);
93 }
94
x509v3_add_len_value_uchar(const char * name,const unsigned char * value,size_t vallen,STACK_OF (CONF_VALUE)** extlist)95 int x509v3_add_len_value_uchar(const char *name, const unsigned char *value,
96 size_t vallen, STACK_OF(CONF_VALUE) **extlist)
97 {
98 return x509v3_add_len_value(name, (const char *)value, vallen, extlist);
99 }
100
101 /* Free function for STACK_OF(CONF_VALUE) */
102
X509V3_conf_free(CONF_VALUE * conf)103 void X509V3_conf_free(CONF_VALUE *conf)
104 {
105 if (!conf)
106 return;
107 OPENSSL_free(conf->name);
108 OPENSSL_free(conf->value);
109 OPENSSL_free(conf->section);
110 OPENSSL_free(conf);
111 }
112
X509V3_add_value_bool(const char * name,int asn1_bool,STACK_OF (CONF_VALUE)** extlist)113 int X509V3_add_value_bool(const char *name, int asn1_bool,
114 STACK_OF(CONF_VALUE) **extlist)
115 {
116 if (asn1_bool)
117 return X509V3_add_value(name, "TRUE", extlist);
118 return X509V3_add_value(name, "FALSE", extlist);
119 }
120
X509V3_add_value_bool_nf(const char * name,int asn1_bool,STACK_OF (CONF_VALUE)** extlist)121 int X509V3_add_value_bool_nf(const char *name, int asn1_bool,
122 STACK_OF(CONF_VALUE) **extlist)
123 {
124 if (asn1_bool)
125 return X509V3_add_value(name, "TRUE", extlist);
126 return 1;
127 }
128
bignum_to_string(const BIGNUM * bn)129 static char *bignum_to_string(const BIGNUM *bn)
130 {
131 char *tmp, *ret;
132 size_t len;
133
134 /*
135 * Display large numbers in hex and small numbers in decimal. Converting to
136 * decimal takes quadratic time and is no more useful than hex for large
137 * numbers.
138 */
139 if (BN_num_bits(bn) < 128)
140 return BN_bn2dec(bn);
141
142 tmp = BN_bn2hex(bn);
143 if (tmp == NULL)
144 return NULL;
145
146 len = strlen(tmp) + 3;
147 ret = OPENSSL_malloc(len);
148 if (ret == NULL) {
149 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
150 OPENSSL_free(tmp);
151 return NULL;
152 }
153
154 /* Prepend "0x", but place it after the "-" if negative. */
155 if (tmp[0] == '-') {
156 OPENSSL_strlcpy(ret, "-0x", len);
157 OPENSSL_strlcat(ret, tmp + 1, len);
158 } else {
159 OPENSSL_strlcpy(ret, "0x", len);
160 OPENSSL_strlcat(ret, tmp, len);
161 }
162 OPENSSL_free(tmp);
163 return ret;
164 }
165
i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD * method,const ASN1_ENUMERATED * a)166 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, const ASN1_ENUMERATED *a)
167 {
168 BIGNUM *bntmp = NULL;
169 char *strtmp = NULL;
170
171 if (!a)
172 return NULL;
173 if ((bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) == NULL
174 || (strtmp = bignum_to_string(bntmp)) == NULL)
175 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
176 BN_free(bntmp);
177 return strtmp;
178 }
179
i2s_ASN1_INTEGER(X509V3_EXT_METHOD * method,const ASN1_INTEGER * a)180 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, const ASN1_INTEGER *a)
181 {
182 BIGNUM *bntmp = NULL;
183 char *strtmp = NULL;
184
185 if (!a)
186 return NULL;
187 if ((bntmp = ASN1_INTEGER_to_BN(a, NULL)) == NULL
188 || (strtmp = bignum_to_string(bntmp)) == NULL)
189 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
190 BN_free(bntmp);
191 return strtmp;
192 }
193
s2i_ASN1_INTEGER(X509V3_EXT_METHOD * method,const char * value)194 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, const char *value)
195 {
196 BIGNUM *bn = NULL;
197 ASN1_INTEGER *aint;
198 int isneg, ishex;
199 int ret;
200
201 if (value == NULL) {
202 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_NULL_VALUE);
203 return NULL;
204 }
205 bn = BN_new();
206 if (bn == NULL) {
207 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
208 return NULL;
209 }
210 if (value[0] == '-') {
211 value++;
212 isneg = 1;
213 } else {
214 isneg = 0;
215 }
216
217 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
218 value += 2;
219 ishex = 1;
220 } else {
221 ishex = 0;
222 }
223
224 if (ishex)
225 ret = BN_hex2bn(&bn, value);
226 else
227 ret = BN_dec2bn(&bn, value);
228
229 if (!ret || value[ret]) {
230 BN_free(bn);
231 ERR_raise(ERR_LIB_X509V3, X509V3_R_BN_DEC2BN_ERROR);
232 return NULL;
233 }
234
235 if (isneg && BN_is_zero(bn))
236 isneg = 0;
237
238 aint = BN_to_ASN1_INTEGER(bn, NULL);
239 BN_free(bn);
240 if (!aint) {
241 ERR_raise(ERR_LIB_X509V3, X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
242 return NULL;
243 }
244 if (isneg)
245 aint->type |= V_ASN1_NEG;
246 return aint;
247 }
248
X509V3_add_value_int(const char * name,const ASN1_INTEGER * aint,STACK_OF (CONF_VALUE)** extlist)249 int X509V3_add_value_int(const char *name, const ASN1_INTEGER *aint,
250 STACK_OF(CONF_VALUE) **extlist)
251 {
252 char *strtmp;
253 int ret;
254
255 if (!aint)
256 return 1;
257 if ((strtmp = i2s_ASN1_INTEGER(NULL, aint)) == NULL)
258 return 0;
259 ret = X509V3_add_value(name, strtmp, extlist);
260 OPENSSL_free(strtmp);
261 return ret;
262 }
263
X509V3_get_value_bool(const CONF_VALUE * value,int * asn1_bool)264 int X509V3_get_value_bool(const CONF_VALUE *value, int *asn1_bool)
265 {
266 const char *btmp;
267
268 if ((btmp = value->value) == NULL)
269 goto err;
270 if (strcmp(btmp, "TRUE") == 0
271 || strcmp(btmp, "true") == 0
272 || strcmp(btmp, "Y") == 0
273 || strcmp(btmp, "y") == 0
274 || strcmp(btmp, "YES") == 0
275 || strcmp(btmp, "yes") == 0) {
276 *asn1_bool = 0xff;
277 return 1;
278 }
279 if (strcmp(btmp, "FALSE") == 0
280 || strcmp(btmp, "false") == 0
281 || strcmp(btmp, "N") == 0
282 || strcmp(btmp, "n") == 0
283 || strcmp(btmp, "NO") == 0
284 || strcmp(btmp, "no") == 0) {
285 *asn1_bool = 0;
286 return 1;
287 }
288 err:
289 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_BOOLEAN_STRING);
290 X509V3_conf_add_error_name_value(value);
291 return 0;
292 }
293
X509V3_get_value_int(const CONF_VALUE * value,ASN1_INTEGER ** aint)294 int X509V3_get_value_int(const CONF_VALUE *value, ASN1_INTEGER **aint)
295 {
296 ASN1_INTEGER *itmp;
297
298 if ((itmp = s2i_ASN1_INTEGER(NULL, value->value)) == NULL) {
299 X509V3_conf_add_error_name_value(value);
300 return 0;
301 }
302 *aint = itmp;
303 return 1;
304 }
305
306 #define HDR_NAME 1
307 #define HDR_VALUE 2
308
309 /*
310 * #define DEBUG
311 */
312
STACK_OF(CONF_VALUE)313 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
314 {
315 char *p, *q, c;
316 char *ntmp, *vtmp;
317 STACK_OF(CONF_VALUE) *values = NULL;
318 char *linebuf;
319 int state;
320
321 /* We are going to modify the line so copy it first */
322 linebuf = OPENSSL_strdup(line);
323 if (linebuf == NULL) {
324 ERR_raise(ERR_LIB_X509V3, ERR_R_MALLOC_FAILURE);
325 goto err;
326 }
327 state = HDR_NAME;
328 ntmp = NULL;
329 /* Go through all characters */
330 for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
331 p++) {
332
333 switch (state) {
334 case HDR_NAME:
335 if (c == ':') {
336 state = HDR_VALUE;
337 *p = 0;
338 ntmp = strip_spaces(q);
339 if (!ntmp) {
340 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_EMPTY_NAME);
341 goto err;
342 }
343 q = p + 1;
344 } else if (c == ',') {
345 *p = 0;
346 ntmp = strip_spaces(q);
347 q = p + 1;
348 if (!ntmp) {
349 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_EMPTY_NAME);
350 goto err;
351 }
352 if (!X509V3_add_value(ntmp, NULL, &values)) {
353 goto err;
354 }
355 }
356 break;
357
358 case HDR_VALUE:
359 if (c == ',') {
360 state = HDR_NAME;
361 *p = 0;
362 vtmp = strip_spaces(q);
363 if (!vtmp) {
364 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_NULL_VALUE);
365 goto err;
366 }
367 if (!X509V3_add_value(ntmp, vtmp, &values)) {
368 goto err;
369 }
370 ntmp = NULL;
371 q = p + 1;
372 }
373
374 }
375 }
376
377 if (state == HDR_VALUE) {
378 vtmp = strip_spaces(q);
379 if (!vtmp) {
380 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_NULL_VALUE);
381 goto err;
382 }
383 if (!X509V3_add_value(ntmp, vtmp, &values)) {
384 goto err;
385 }
386 } else {
387 ntmp = strip_spaces(q);
388 if (!ntmp) {
389 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_EMPTY_NAME);
390 goto err;
391 }
392 if (!X509V3_add_value(ntmp, NULL, &values)) {
393 goto err;
394 }
395 }
396 OPENSSL_free(linebuf);
397 return values;
398
399 err:
400 OPENSSL_free(linebuf);
401 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
402 return NULL;
403
404 }
405
406 /* Delete leading and trailing spaces from a string */
strip_spaces(char * name)407 static char *strip_spaces(char *name)
408 {
409 char *p, *q;
410
411 /* Skip over leading spaces */
412 p = name;
413 while (*p && ossl_isspace(*p))
414 p++;
415 if (*p == '\0')
416 return NULL;
417 q = p + strlen(p) - 1;
418 while ((q != p) && ossl_isspace(*q))
419 q--;
420 if (p != q)
421 q[1] = 0;
422 if (*p == '\0')
423 return NULL;
424 return p;
425 }
426
427
428 /*
429 * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
430 */
431
ossl_v3_name_cmp(const char * name,const char * cmp)432 int ossl_v3_name_cmp(const char *name, const char *cmp)
433 {
434 int len, ret;
435 char c;
436
437 len = strlen(cmp);
438 if ((ret = strncmp(name, cmp, len)))
439 return ret;
440 c = name[len];
441 if (!c || (c == '.'))
442 return 0;
443 return 1;
444 }
445
sk_strcmp(const char * const * a,const char * const * b)446 static int sk_strcmp(const char *const *a, const char *const *b)
447 {
448 return strcmp(*a, *b);
449 }
450
STACK_OF(OPENSSL_STRING)451 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
452 {
453 GENERAL_NAMES *gens;
454 STACK_OF(OPENSSL_STRING) *ret;
455
456 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
457 ret = get_email(X509_get_subject_name(x), gens);
458 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
459 return ret;
460 }
461
STACK_OF(OPENSSL_STRING)462 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
463 {
464 AUTHORITY_INFO_ACCESS *info;
465 STACK_OF(OPENSSL_STRING) *ret = NULL;
466 int i;
467
468 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
469 if (!info)
470 return NULL;
471 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
472 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
473 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
474 if (ad->location->type == GEN_URI) {
475 if (!append_ia5
476 (&ret, ad->location->d.uniformResourceIdentifier))
477 break;
478 }
479 }
480 }
481 AUTHORITY_INFO_ACCESS_free(info);
482 return ret;
483 }
484
STACK_OF(OPENSSL_STRING)485 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
486 {
487 GENERAL_NAMES *gens;
488 STACK_OF(X509_EXTENSION) *exts;
489 STACK_OF(OPENSSL_STRING) *ret;
490
491 exts = X509_REQ_get_extensions(x);
492 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
493 ret = get_email(X509_REQ_get_subject_name(x), gens);
494 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
495 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
496 return ret;
497 }
498
STACK_OF(OPENSSL_STRING)499 static STACK_OF(OPENSSL_STRING) *get_email(const X509_NAME *name,
500 GENERAL_NAMES *gens)
501 {
502 STACK_OF(OPENSSL_STRING) *ret = NULL;
503 X509_NAME_ENTRY *ne;
504 const ASN1_IA5STRING *email;
505 GENERAL_NAME *gen;
506 int i = -1;
507
508 /* Now add any email address(es) to STACK */
509 /* First supplied X509_NAME */
510 while ((i = X509_NAME_get_index_by_NID(name,
511 NID_pkcs9_emailAddress, i)) >= 0) {
512 ne = X509_NAME_get_entry(name, i);
513 email = X509_NAME_ENTRY_get_data(ne);
514 if (!append_ia5(&ret, email))
515 return NULL;
516 }
517 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
518 gen = sk_GENERAL_NAME_value(gens, i);
519 if (gen->type != GEN_EMAIL)
520 continue;
521 if (!append_ia5(&ret, gen->d.ia5))
522 return NULL;
523 }
524 return ret;
525 }
526
str_free(OPENSSL_STRING str)527 static void str_free(OPENSSL_STRING str)
528 {
529 OPENSSL_free(str);
530 }
531
append_ia5(STACK_OF (OPENSSL_STRING)** sk,const ASN1_IA5STRING * email)532 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk,
533 const ASN1_IA5STRING *email)
534 {
535 char *emtmp;
536
537 /* First some sanity checks */
538 if (email->type != V_ASN1_IA5STRING)
539 return 1;
540 if (email->data == NULL || email->length == 0)
541 return 1;
542 if (memchr(email->data, 0, email->length) != NULL)
543 return 1;
544 if (*sk == NULL)
545 *sk = sk_OPENSSL_STRING_new(sk_strcmp);
546 if (*sk == NULL)
547 return 0;
548
549 emtmp = OPENSSL_strndup((char *)email->data, email->length);
550 if (emtmp == NULL) {
551 X509_email_free(*sk);
552 *sk = NULL;
553 return 0;
554 }
555
556 /* Don't add duplicates */
557 if (sk_OPENSSL_STRING_find(*sk, emtmp) != -1) {
558 OPENSSL_free(emtmp);
559 return 1;
560 }
561 if (!sk_OPENSSL_STRING_push(*sk, emtmp)) {
562 OPENSSL_free(emtmp); /* free on push failure */
563 X509_email_free(*sk);
564 *sk = NULL;
565 return 0;
566 }
567 return 1;
568 }
569
X509_email_free(STACK_OF (OPENSSL_STRING)* sk)570 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
571 {
572 sk_OPENSSL_STRING_pop_free(sk, str_free);
573 }
574
575 typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len,
576 const unsigned char *subject, size_t subject_len,
577 unsigned int flags);
578
579 /* Skip pattern prefix to match "wildcard" subject */
skip_prefix(const unsigned char ** p,size_t * plen,size_t subject_len,unsigned int flags)580 static void skip_prefix(const unsigned char **p, size_t *plen,
581 size_t subject_len,
582 unsigned int flags)
583 {
584 const unsigned char *pattern = *p;
585 size_t pattern_len = *plen;
586
587 /*
588 * If subject starts with a leading '.' followed by more octets, and
589 * pattern is longer, compare just an equal-length suffix with the
590 * full subject (starting at the '.'), provided the prefix contains
591 * no NULs.
592 */
593 if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
594 return;
595
596 while (pattern_len > subject_len && *pattern) {
597 if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
598 *pattern == '.')
599 break;
600 ++pattern;
601 --pattern_len;
602 }
603
604 /* Skip if entire prefix acceptable */
605 if (pattern_len == subject_len) {
606 *p = pattern;
607 *plen = pattern_len;
608 }
609 }
610
611 /* Compare while ASCII ignoring case. */
equal_nocase(const unsigned char * pattern,size_t pattern_len,const unsigned char * subject,size_t subject_len,unsigned int flags)612 static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
613 const unsigned char *subject, size_t subject_len,
614 unsigned int flags)
615 {
616 skip_prefix(&pattern, &pattern_len, subject_len, flags);
617 if (pattern_len != subject_len)
618 return 0;
619 while (pattern_len != 0) {
620 unsigned char l = *pattern;
621 unsigned char r = *subject;
622
623 /* The pattern must not contain NUL characters. */
624 if (l == 0)
625 return 0;
626 if (l != r) {
627 if ('A' <= l && l <= 'Z')
628 l = (l - 'A') + 'a';
629 if ('A' <= r && r <= 'Z')
630 r = (r - 'A') + 'a';
631 if (l != r)
632 return 0;
633 }
634 ++pattern;
635 ++subject;
636 --pattern_len;
637 }
638 return 1;
639 }
640
641 /* Compare using memcmp. */
equal_case(const unsigned char * pattern,size_t pattern_len,const unsigned char * subject,size_t subject_len,unsigned int flags)642 static int equal_case(const unsigned char *pattern, size_t pattern_len,
643 const unsigned char *subject, size_t subject_len,
644 unsigned int flags)
645 {
646 skip_prefix(&pattern, &pattern_len, subject_len, flags);
647 if (pattern_len != subject_len)
648 return 0;
649 return !memcmp(pattern, subject, pattern_len);
650 }
651
652 /*
653 * RFC 5280, section 7.5, requires that only the domain is compared in a
654 * case-insensitive manner.
655 */
equal_email(const unsigned char * a,size_t a_len,const unsigned char * b,size_t b_len,unsigned int unused_flags)656 static int equal_email(const unsigned char *a, size_t a_len,
657 const unsigned char *b, size_t b_len,
658 unsigned int unused_flags)
659 {
660 size_t i = a_len;
661
662 if (a_len != b_len)
663 return 0;
664 /*
665 * We search backwards for the '@' character, so that we do not have to
666 * deal with quoted local-parts. The domain part is compared in a
667 * case-insensitive manner.
668 */
669 while (i > 0) {
670 --i;
671 if (a[i] == '@' || b[i] == '@') {
672 if (!equal_nocase(a + i, a_len - i, b + i, a_len - i, 0))
673 return 0;
674 break;
675 }
676 }
677 if (i == 0)
678 i = a_len;
679 return equal_case(a, i, b, i, 0);
680 }
681
682 /*
683 * Compare the prefix and suffix with the subject, and check that the
684 * characters in-between are valid.
685 */
wildcard_match(const unsigned char * prefix,size_t prefix_len,const unsigned char * suffix,size_t suffix_len,const unsigned char * subject,size_t subject_len,unsigned int flags)686 static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
687 const unsigned char *suffix, size_t suffix_len,
688 const unsigned char *subject, size_t subject_len,
689 unsigned int flags)
690 {
691 const unsigned char *wildcard_start;
692 const unsigned char *wildcard_end;
693 const unsigned char *p;
694 int allow_multi = 0;
695 int allow_idna = 0;
696
697 if (subject_len < prefix_len + suffix_len)
698 return 0;
699 if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
700 return 0;
701 wildcard_start = subject + prefix_len;
702 wildcard_end = subject + (subject_len - suffix_len);
703 if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
704 return 0;
705 /*
706 * If the wildcard makes up the entire first label, it must match at
707 * least one character.
708 */
709 if (prefix_len == 0 && *suffix == '.') {
710 if (wildcard_start == wildcard_end)
711 return 0;
712 allow_idna = 1;
713 if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
714 allow_multi = 1;
715 }
716 /* IDNA labels cannot match partial wildcards */
717 if (!allow_idna &&
718 subject_len >= 4 && OPENSSL_strncasecmp((char *)subject, "xn--", 4) == 0)
719 return 0;
720 /* The wildcard may match a literal '*' */
721 if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
722 return 1;
723 /*
724 * Check that the part matched by the wildcard contains only
725 * permitted characters and only matches a single label unless
726 * allow_multi is set.
727 */
728 for (p = wildcard_start; p != wildcard_end; ++p)
729 if (!(('0' <= *p && *p <= '9') ||
730 ('A' <= *p && *p <= 'Z') ||
731 ('a' <= *p && *p <= 'z') ||
732 *p == '-' || (allow_multi && *p == '.')))
733 return 0;
734 return 1;
735 }
736
737 #define LABEL_START (1 << 0)
738 #define LABEL_END (1 << 1)
739 #define LABEL_HYPHEN (1 << 2)
740 #define LABEL_IDNA (1 << 3)
741
valid_star(const unsigned char * p,size_t len,unsigned int flags)742 static const unsigned char *valid_star(const unsigned char *p, size_t len,
743 unsigned int flags)
744 {
745 const unsigned char *star = 0;
746 size_t i;
747 int state = LABEL_START;
748 int dots = 0;
749
750 for (i = 0; i < len; ++i) {
751 /*
752 * Locate first and only legal wildcard, either at the start
753 * or end of a non-IDNA first and not final label.
754 */
755 if (p[i] == '*') {
756 int atstart = (state & LABEL_START);
757 int atend = (i == len - 1 || p[i + 1] == '.');
758 /*-
759 * At most one wildcard per pattern.
760 * No wildcards in IDNA labels.
761 * No wildcards after the first label.
762 */
763 if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
764 return NULL;
765 /* Only full-label '*.example.com' wildcards? */
766 if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
767 && (!atstart || !atend))
768 return NULL;
769 /* No 'foo*bar' wildcards */
770 if (!atstart && !atend)
771 return NULL;
772 star = &p[i];
773 state &= ~LABEL_START;
774 } else if (('a' <= p[i] && p[i] <= 'z')
775 || ('A' <= p[i] && p[i] <= 'Z')
776 || ('0' <= p[i] && p[i] <= '9')) {
777 if ((state & LABEL_START) != 0
778 && len - i >= 4 && OPENSSL_strncasecmp((char *)&p[i], "xn--", 4) == 0)
779 state |= LABEL_IDNA;
780 state &= ~(LABEL_HYPHEN | LABEL_START);
781 } else if (p[i] == '.') {
782 if ((state & (LABEL_HYPHEN | LABEL_START)) != 0)
783 return NULL;
784 state = LABEL_START;
785 ++dots;
786 } else if (p[i] == '-') {
787 /* no domain/subdomain starts with '-' */
788 if ((state & LABEL_START) != 0)
789 return NULL;
790 state |= LABEL_HYPHEN;
791 } else {
792 return NULL;
793 }
794 }
795
796 /*
797 * The final label must not end in a hyphen or ".", and
798 * there must be at least two dots after the star.
799 */
800 if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2)
801 return NULL;
802 return star;
803 }
804
805 /* Compare using wildcards. */
equal_wildcard(const unsigned char * pattern,size_t pattern_len,const unsigned char * subject,size_t subject_len,unsigned int flags)806 static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
807 const unsigned char *subject, size_t subject_len,
808 unsigned int flags)
809 {
810 const unsigned char *star = NULL;
811
812 /*
813 * Subject names starting with '.' can only match a wildcard pattern
814 * via a subject sub-domain pattern suffix match.
815 */
816 if (!(subject_len > 1 && subject[0] == '.'))
817 star = valid_star(pattern, pattern_len, flags);
818 if (star == NULL)
819 return equal_nocase(pattern, pattern_len,
820 subject, subject_len, flags);
821 return wildcard_match(pattern, star - pattern,
822 star + 1, (pattern + pattern_len) - star - 1,
823 subject, subject_len, flags);
824 }
825
826 /*
827 * Compare an ASN1_STRING to a supplied string. If they match return 1. If
828 * cmp_type > 0 only compare if string matches the type, otherwise convert it
829 * to UTF8.
830 */
831
do_check_string(const ASN1_STRING * a,int cmp_type,equal_fn equal,unsigned int flags,const char * b,size_t blen,char ** peername)832 static int do_check_string(const ASN1_STRING *a, int cmp_type, equal_fn equal,
833 unsigned int flags, const char *b, size_t blen,
834 char **peername)
835 {
836 int rv = 0;
837
838 if (!a->data || !a->length)
839 return 0;
840 if (cmp_type > 0) {
841 if (cmp_type != a->type)
842 return 0;
843 if (cmp_type == V_ASN1_IA5STRING)
844 rv = equal(a->data, a->length, (unsigned char *)b, blen, flags);
845 else if (a->length == (int)blen && !memcmp(a->data, b, blen))
846 rv = 1;
847 if (rv > 0 && peername != NULL) {
848 *peername = OPENSSL_strndup((char *)a->data, a->length);
849 if (*peername == NULL)
850 return -1;
851 }
852 } else {
853 int astrlen;
854 unsigned char *astr;
855 astrlen = ASN1_STRING_to_UTF8(&astr, a);
856 if (astrlen < 0) {
857 /*
858 * -1 could be an internal malloc failure or a decoding error from
859 * malformed input; we can't distinguish.
860 */
861 return -1;
862 }
863 rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
864 if (rv > 0 && peername != NULL) {
865 *peername = OPENSSL_strndup((char *)astr, astrlen);
866 if (*peername == NULL) {
867 OPENSSL_free(astr);
868 return -1;
869 }
870 }
871 OPENSSL_free(astr);
872 }
873 return rv;
874 }
875
do_x509_check(X509 * x,const char * chk,size_t chklen,unsigned int flags,int check_type,char ** peername)876 static int do_x509_check(X509 *x, const char *chk, size_t chklen,
877 unsigned int flags, int check_type, char **peername)
878 {
879 GENERAL_NAMES *gens = NULL;
880 const X509_NAME *name = NULL;
881 int i;
882 int cnid = NID_undef;
883 int alt_type;
884 int san_present = 0;
885 int rv = 0;
886 equal_fn equal;
887
888 /* See below, this flag is internal-only */
889 flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
890 if (check_type == GEN_EMAIL) {
891 cnid = NID_pkcs9_emailAddress;
892 alt_type = V_ASN1_IA5STRING;
893 equal = equal_email;
894 } else if (check_type == GEN_DNS) {
895 cnid = NID_commonName;
896 /* Implicit client-side DNS sub-domain pattern */
897 if (chklen > 1 && chk[0] == '.')
898 flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
899 alt_type = V_ASN1_IA5STRING;
900 if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
901 equal = equal_nocase;
902 else
903 equal = equal_wildcard;
904 } else {
905 alt_type = V_ASN1_OCTET_STRING;
906 equal = equal_case;
907 }
908
909 if (chklen == 0)
910 chklen = strlen(chk);
911
912 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
913 if (gens) {
914 for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
915 GENERAL_NAME *gen;
916 ASN1_STRING *cstr;
917
918 gen = sk_GENERAL_NAME_value(gens, i);
919 if ((gen->type == GEN_OTHERNAME) && (check_type == GEN_EMAIL)) {
920 if (OBJ_obj2nid(gen->d.otherName->type_id) ==
921 NID_id_on_SmtpUTF8Mailbox) {
922 san_present = 1;
923
924 /*
925 * If it is not a UTF8String then that is unexpected and we
926 * treat it as no match
927 */
928 if (gen->d.otherName->value->type == V_ASN1_UTF8STRING) {
929 cstr = gen->d.otherName->value->value.utf8string;
930
931 /* Positive on success, negative on error! */
932 if ((rv = do_check_string(cstr, 0, equal, flags,
933 chk, chklen, peername)) != 0)
934 break;
935 }
936 } else
937 continue;
938 } else {
939 if ((gen->type != check_type) && (gen->type != GEN_OTHERNAME))
940 continue;
941 }
942 san_present = 1;
943 if (check_type == GEN_EMAIL)
944 cstr = gen->d.rfc822Name;
945 else if (check_type == GEN_DNS)
946 cstr = gen->d.dNSName;
947 else
948 cstr = gen->d.iPAddress;
949 /* Positive on success, negative on error! */
950 if ((rv = do_check_string(cstr, alt_type, equal, flags,
951 chk, chklen, peername)) != 0)
952 break;
953 }
954 GENERAL_NAMES_free(gens);
955 if (rv != 0)
956 return rv;
957 if (san_present && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT))
958 return 0;
959 }
960
961 /* We're done if CN-ID is not pertinent */
962 if (cnid == NID_undef || (flags & X509_CHECK_FLAG_NEVER_CHECK_SUBJECT))
963 return 0;
964
965 i = -1;
966 name = X509_get_subject_name(x);
967 while ((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0) {
968 const X509_NAME_ENTRY *ne = X509_NAME_get_entry(name, i);
969 const ASN1_STRING *str = X509_NAME_ENTRY_get_data(ne);
970
971 /* Positive on success, negative on error! */
972 if ((rv = do_check_string(str, -1, equal, flags,
973 chk, chklen, peername)) != 0)
974 return rv;
975 }
976 return 0;
977 }
978
X509_check_host(X509 * x,const char * chk,size_t chklen,unsigned int flags,char ** peername)979 int X509_check_host(X509 *x, const char *chk, size_t chklen,
980 unsigned int flags, char **peername)
981 {
982 if (chk == NULL)
983 return -2;
984 /*
985 * Embedded NULs are disallowed, except as the last character of a
986 * string of length 2 or more (tolerate caller including terminating
987 * NUL in string length).
988 */
989 if (chklen == 0)
990 chklen = strlen(chk);
991 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
992 return -2;
993 if (chklen > 1 && chk[chklen - 1] == '\0')
994 --chklen;
995 return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername);
996 }
997
X509_check_email(X509 * x,const char * chk,size_t chklen,unsigned int flags)998 int X509_check_email(X509 *x, const char *chk, size_t chklen,
999 unsigned int flags)
1000 {
1001 if (chk == NULL)
1002 return -2;
1003 /*
1004 * Embedded NULs are disallowed, except as the last character of a
1005 * string of length 2 or more (tolerate caller including terminating
1006 * NUL in string length).
1007 */
1008 if (chklen == 0)
1009 chklen = strlen((char *)chk);
1010 else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
1011 return -2;
1012 if (chklen > 1 && chk[chklen - 1] == '\0')
1013 --chklen;
1014 return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL);
1015 }
1016
X509_check_ip(X509 * x,const unsigned char * chk,size_t chklen,unsigned int flags)1017 int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
1018 unsigned int flags)
1019 {
1020 if (chk == NULL)
1021 return -2;
1022 return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL);
1023 }
1024
X509_check_ip_asc(X509 * x,const char * ipasc,unsigned int flags)1025 int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
1026 {
1027 unsigned char ipout[16];
1028 size_t iplen;
1029
1030 if (ipasc == NULL)
1031 return -2;
1032 iplen = (size_t)ossl_a2i_ipadd(ipout, ipasc);
1033 if (iplen == 0)
1034 return -2;
1035 return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL);
1036 }
1037
ossl_ipaddr_to_asc(unsigned char * p,int len)1038 char *ossl_ipaddr_to_asc(unsigned char *p, int len)
1039 {
1040 /*
1041 * 40 is enough space for the longest IPv6 address + nul terminator byte
1042 * XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX:XXXX\0
1043 */
1044 char buf[40], *out;
1045 int i = 0, remain = 0, bytes = 0;
1046
1047 switch (len) {
1048 case 4: /* IPv4 */
1049 BIO_snprintf(buf, sizeof(buf), "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
1050 break;
1051 case 16: /* IPv6 */
1052 for (out = buf, i = 8, remain = sizeof(buf);
1053 i-- > 0 && bytes >= 0;
1054 remain -= bytes, out += bytes) {
1055 const char *template = (i > 0 ? "%X:" : "%X");
1056
1057 bytes = BIO_snprintf(out, remain, template, p[0] << 8 | p[1]);
1058 p += 2;
1059 }
1060 break;
1061 default:
1062 BIO_snprintf(buf, sizeof(buf), "<invalid length=%d>", len);
1063 break;
1064 }
1065 return OPENSSL_strdup(buf);
1066 }
1067
1068 /*
1069 * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
1070 * with RFC3280.
1071 */
1072
a2i_IPADDRESS(const char * ipasc)1073 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
1074 {
1075 unsigned char ipout[16];
1076 ASN1_OCTET_STRING *ret;
1077 int iplen;
1078
1079 /* If string contains a ':' assume IPv6 */
1080
1081 iplen = ossl_a2i_ipadd(ipout, ipasc);
1082
1083 if (!iplen)
1084 return NULL;
1085
1086 ret = ASN1_OCTET_STRING_new();
1087 if (ret == NULL)
1088 return NULL;
1089 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
1090 ASN1_OCTET_STRING_free(ret);
1091 return NULL;
1092 }
1093 return ret;
1094 }
1095
a2i_IPADDRESS_NC(const char * ipasc)1096 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
1097 {
1098 ASN1_OCTET_STRING *ret = NULL;
1099 unsigned char ipout[32];
1100 char *iptmp = NULL, *p;
1101 int iplen1, iplen2;
1102
1103 p = strchr(ipasc, '/');
1104 if (p == NULL)
1105 return NULL;
1106 iptmp = OPENSSL_strdup(ipasc);
1107 if (iptmp == NULL)
1108 return NULL;
1109 p = iptmp + (p - ipasc);
1110 *p++ = 0;
1111
1112 iplen1 = ossl_a2i_ipadd(ipout, iptmp);
1113
1114 if (!iplen1)
1115 goto err;
1116
1117 iplen2 = ossl_a2i_ipadd(ipout + iplen1, p);
1118
1119 OPENSSL_free(iptmp);
1120 iptmp = NULL;
1121
1122 if (!iplen2 || (iplen1 != iplen2))
1123 goto err;
1124
1125 ret = ASN1_OCTET_STRING_new();
1126 if (ret == NULL)
1127 goto err;
1128 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
1129 goto err;
1130
1131 return ret;
1132
1133 err:
1134 OPENSSL_free(iptmp);
1135 ASN1_OCTET_STRING_free(ret);
1136 return NULL;
1137 }
1138
ossl_a2i_ipadd(unsigned char * ipout,const char * ipasc)1139 int ossl_a2i_ipadd(unsigned char *ipout, const char *ipasc)
1140 {
1141 /* If string contains a ':' assume IPv6 */
1142
1143 if (strchr(ipasc, ':')) {
1144 if (!ipv6_from_asc(ipout, ipasc))
1145 return 0;
1146 return 16;
1147 } else {
1148 if (!ipv4_from_asc(ipout, ipasc))
1149 return 0;
1150 return 4;
1151 }
1152 }
1153
ipv4_from_asc(unsigned char * v4,const char * in)1154 static int ipv4_from_asc(unsigned char *v4, const char *in)
1155 {
1156 const char *p;
1157 int a0, a1, a2, a3, n;
1158
1159 if (sscanf(in, "%d.%d.%d.%d%n", &a0, &a1, &a2, &a3, &n) != 4)
1160 return 0;
1161 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
1162 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
1163 return 0;
1164 p = in + n;
1165 if (!(*p == '\0' || ossl_isspace(*p)))
1166 return 0;
1167 v4[0] = a0;
1168 v4[1] = a1;
1169 v4[2] = a2;
1170 v4[3] = a3;
1171 return 1;
1172 }
1173
1174 typedef struct {
1175 /* Temporary store for IPV6 output */
1176 unsigned char tmp[16];
1177 /* Total number of bytes in tmp */
1178 int total;
1179 /* The position of a zero (corresponding to '::') */
1180 int zero_pos;
1181 /* Number of zeroes */
1182 int zero_cnt;
1183 } IPV6_STAT;
1184
ipv6_from_asc(unsigned char * v6,const char * in)1185 static int ipv6_from_asc(unsigned char *v6, const char *in)
1186 {
1187 IPV6_STAT v6stat;
1188
1189 v6stat.total = 0;
1190 v6stat.zero_pos = -1;
1191 v6stat.zero_cnt = 0;
1192 /*
1193 * Treat the IPv6 representation as a list of values separated by ':'.
1194 * The presence of a '::' will parse as one, two or three zero length
1195 * elements.
1196 */
1197 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
1198 return 0;
1199
1200 /* Now for some sanity checks */
1201
1202 if (v6stat.zero_pos == -1) {
1203 /* If no '::' must have exactly 16 bytes */
1204 if (v6stat.total != 16)
1205 return 0;
1206 } else {
1207 /* If '::' must have less than 16 bytes */
1208 if (v6stat.total == 16)
1209 return 0;
1210 /* More than three zeroes is an error */
1211 if (v6stat.zero_cnt > 3) {
1212 return 0;
1213 /* Can only have three zeroes if nothing else present */
1214 } else if (v6stat.zero_cnt == 3) {
1215 if (v6stat.total > 0)
1216 return 0;
1217 } else if (v6stat.zero_cnt == 2) {
1218 /* Can only have two zeroes if at start or end */
1219 if ((v6stat.zero_pos != 0)
1220 && (v6stat.zero_pos != v6stat.total))
1221 return 0;
1222 } else {
1223 /* Can only have one zero if *not* start or end */
1224 if ((v6stat.zero_pos == 0)
1225 || (v6stat.zero_pos == v6stat.total))
1226 return 0;
1227 }
1228 }
1229
1230 /* Format result */
1231
1232 if (v6stat.zero_pos >= 0) {
1233 /* Copy initial part */
1234 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
1235 /* Zero middle */
1236 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
1237 /* Copy final part */
1238 if (v6stat.total != v6stat.zero_pos)
1239 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
1240 v6stat.tmp + v6stat.zero_pos,
1241 v6stat.total - v6stat.zero_pos);
1242 } else {
1243 memcpy(v6, v6stat.tmp, 16);
1244 }
1245
1246 return 1;
1247 }
1248
ipv6_cb(const char * elem,int len,void * usr)1249 static int ipv6_cb(const char *elem, int len, void *usr)
1250 {
1251 IPV6_STAT *s = usr;
1252
1253 /* Error if 16 bytes written */
1254 if (s->total == 16)
1255 return 0;
1256 if (len == 0) {
1257 /* Zero length element, corresponds to '::' */
1258 if (s->zero_pos == -1)
1259 s->zero_pos = s->total;
1260 /* If we've already got a :: its an error */
1261 else if (s->zero_pos != s->total)
1262 return 0;
1263 s->zero_cnt++;
1264 } else {
1265 /* If more than 4 characters could be final a.b.c.d form */
1266 if (len > 4) {
1267 /* Need at least 4 bytes left */
1268 if (s->total > 12)
1269 return 0;
1270 /* Must be end of string */
1271 if (elem[len])
1272 return 0;
1273 if (!ipv4_from_asc(s->tmp + s->total, elem))
1274 return 0;
1275 s->total += 4;
1276 } else {
1277 if (!ipv6_hex(s->tmp + s->total, elem, len))
1278 return 0;
1279 s->total += 2;
1280 }
1281 }
1282 return 1;
1283 }
1284
1285 /*
1286 * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
1287 */
1288
ipv6_hex(unsigned char * out,const char * in,int inlen)1289 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
1290 {
1291 unsigned char c;
1292 unsigned int num = 0;
1293 int x;
1294
1295 if (inlen > 4)
1296 return 0;
1297 while (inlen--) {
1298 c = *in++;
1299 num <<= 4;
1300 x = OPENSSL_hexchar2int(c);
1301 if (x < 0)
1302 return 0;
1303 num |= (char)x;
1304 }
1305 out[0] = num >> 8;
1306 out[1] = num & 0xff;
1307 return 1;
1308 }
1309
X509V3_NAME_from_section(X509_NAME * nm,STACK_OF (CONF_VALUE)* dn_sk,unsigned long chtype)1310 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
1311 unsigned long chtype)
1312 {
1313 CONF_VALUE *v;
1314 int i, mval, spec_char, plus_char;
1315 char *p, *type;
1316
1317 if (!nm)
1318 return 0;
1319
1320 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
1321 v = sk_CONF_VALUE_value(dn_sk, i);
1322 type = v->name;
1323 /*
1324 * Skip past any leading X. X: X, etc to allow for multiple instances
1325 */
1326 for (p = type; *p; p++) {
1327 #ifndef CHARSET_EBCDIC
1328 spec_char = ((*p == ':') || (*p == ',') || (*p == '.'));
1329 #else
1330 spec_char = ((*p == os_toascii[':']) || (*p == os_toascii[','])
1331 || (*p == os_toascii['.']));
1332 #endif
1333 if (spec_char) {
1334 p++;
1335 if (*p)
1336 type = p;
1337 break;
1338 }
1339 }
1340 #ifndef CHARSET_EBCDIC
1341 plus_char = (*type == '+');
1342 #else
1343 plus_char = (*type == os_toascii['+']);
1344 #endif
1345 if (plus_char) {
1346 mval = -1;
1347 type++;
1348 } else {
1349 mval = 0;
1350 }
1351 if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
1352 (unsigned char *)v->value, -1, -1,
1353 mval))
1354 return 0;
1355
1356 }
1357 return 1;
1358 }
1359