1 /* $OpenBSD: asn1_gen.c,v 1.19 2022/05/24 19:56:13 tb Exp $ */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2002.
4 */
5 /* ====================================================================
6 * Copyright (c) 2002 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59 #include <string.h>
60
61 #include <openssl/asn1.h>
62 #include <openssl/err.h>
63 #include <openssl/x509v3.h>
64
65 #include "asn1_locl.h"
66
67 #define ASN1_GEN_FLAG 0x10000
68 #define ASN1_GEN_FLAG_IMP (ASN1_GEN_FLAG|1)
69 #define ASN1_GEN_FLAG_EXP (ASN1_GEN_FLAG|2)
70 #define ASN1_GEN_FLAG_TAG (ASN1_GEN_FLAG|3)
71 #define ASN1_GEN_FLAG_BITWRAP (ASN1_GEN_FLAG|4)
72 #define ASN1_GEN_FLAG_OCTWRAP (ASN1_GEN_FLAG|5)
73 #define ASN1_GEN_FLAG_SEQWRAP (ASN1_GEN_FLAG|6)
74 #define ASN1_GEN_FLAG_SETWRAP (ASN1_GEN_FLAG|7)
75 #define ASN1_GEN_FLAG_FORMAT (ASN1_GEN_FLAG|8)
76
77 #define ASN1_GEN_STR(str,val){str, sizeof(str) - 1, val}
78
79 #define ASN1_FLAG_EXP_MAX 20
80
81 /* Input formats */
82
83 /* ASCII: default */
84 #define ASN1_GEN_FORMAT_ASCII 1
85 /* UTF8 */
86 #define ASN1_GEN_FORMAT_UTF8 2
87 /* Hex */
88 #define ASN1_GEN_FORMAT_HEX 3
89 /* List of bits */
90 #define ASN1_GEN_FORMAT_BITLIST 4
91
92 struct tag_name_st {
93 const char *strnam;
94 int len;
95 int tag;
96 };
97
98 typedef struct {
99 int exp_tag;
100 int exp_class;
101 int exp_constructed;
102 int exp_pad;
103 long exp_len;
104 } tag_exp_type;
105
106 typedef struct {
107 int imp_tag;
108 int imp_class;
109 int utype;
110 int format;
111 const char *str;
112 tag_exp_type exp_list[ASN1_FLAG_EXP_MAX];
113 int exp_count;
114 } tag_exp_arg;
115
116 static int bitstr_cb(const char *elem, int len, void *bitstr);
117 static int asn1_cb(const char *elem, int len, void *bitstr);
118 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
119 int exp_constructed, int exp_pad, int imp_ok);
120 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass);
121 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf);
122 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype);
123 static int asn1_str2tag(const char *tagstr, int len);
124
125 ASN1_TYPE *
ASN1_generate_nconf(const char * str,CONF * nconf)126 ASN1_generate_nconf(const char *str, CONF *nconf)
127 {
128 X509V3_CTX cnf;
129
130 if (!nconf)
131 return ASN1_generate_v3(str, NULL);
132
133 X509V3_set_nconf(&cnf, nconf);
134 return ASN1_generate_v3(str, &cnf);
135 }
136
137 ASN1_TYPE *
ASN1_generate_v3(const char * str,X509V3_CTX * cnf)138 ASN1_generate_v3(const char *str, X509V3_CTX *cnf)
139 {
140 ASN1_TYPE *ret;
141 tag_exp_arg asn1_tags;
142 tag_exp_type *etmp;
143
144 int i, len;
145
146 unsigned char *orig_der = NULL, *new_der = NULL;
147 const unsigned char *cpy_start;
148 unsigned char *p;
149 const unsigned char *cp;
150 int cpy_len;
151 long hdr_len = 0;
152 int hdr_constructed = 0, hdr_tag, hdr_class;
153 int r;
154
155 asn1_tags.imp_tag = -1;
156 asn1_tags.imp_class = -1;
157 asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
158 asn1_tags.exp_count = 0;
159 if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0)
160 return NULL;
161
162 if ((asn1_tags.utype == V_ASN1_SEQUENCE) ||
163 (asn1_tags.utype == V_ASN1_SET)) {
164 if (!cnf) {
165 ASN1error(ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG);
166 return NULL;
167 }
168 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf);
169 } else
170 ret = asn1_str2type(asn1_tags.str, asn1_tags.format,
171 asn1_tags.utype);
172
173 if (!ret)
174 return NULL;
175
176 /* If no tagging return base type */
177 if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0))
178 return ret;
179
180 /* Generate the encoding */
181 cpy_len = i2d_ASN1_TYPE(ret, &orig_der);
182 ASN1_TYPE_free(ret);
183 ret = NULL;
184 /* Set point to start copying for modified encoding */
185 cpy_start = orig_der;
186
187 /* Do we need IMPLICIT tagging? */
188 if (asn1_tags.imp_tag != -1) {
189 /* If IMPLICIT we will replace the underlying tag */
190 /* Skip existing tag+len */
191 r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag,
192 &hdr_class, cpy_len);
193 if (r & 0x80)
194 goto err;
195 /* Update copy length */
196 cpy_len -= cpy_start - orig_der;
197 /* For IMPLICIT tagging the length should match the
198 * original length and constructed flag should be
199 * consistent.
200 */
201 if (r & 0x1) {
202 /* Indefinite length constructed */
203 hdr_constructed = 2;
204 hdr_len = 0;
205 } else
206 /* Just retain constructed flag */
207 hdr_constructed = r & V_ASN1_CONSTRUCTED;
208 /* Work out new length with IMPLICIT tag: ignore constructed
209 * because it will mess up if indefinite length
210 */
211 len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag);
212 } else
213 len = cpy_len;
214
215 /* Work out length in any EXPLICIT, starting from end */
216
217 for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1;
218 i < asn1_tags.exp_count; i++, etmp--) {
219 /* Content length: number of content octets + any padding */
220 len += etmp->exp_pad;
221 etmp->exp_len = len;
222 /* Total object length: length including new header */
223 len = ASN1_object_size(0, len, etmp->exp_tag);
224 }
225
226 /* Allocate buffer for new encoding */
227
228 new_der = malloc(len);
229 if (!new_der)
230 goto err;
231
232 /* Generate tagged encoding */
233 p = new_der;
234
235 /* Output explicit tags first */
236 for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count;
237 i++, etmp++) {
238 ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,
239 etmp->exp_tag, etmp->exp_class);
240 if (etmp->exp_pad)
241 *p++ = 0;
242 }
243
244 /* If IMPLICIT, output tag */
245
246 if (asn1_tags.imp_tag != -1) {
247 if (asn1_tags.imp_class == V_ASN1_UNIVERSAL &&
248 (asn1_tags.imp_tag == V_ASN1_SEQUENCE ||
249 asn1_tags.imp_tag == V_ASN1_SET))
250 hdr_constructed = V_ASN1_CONSTRUCTED;
251 ASN1_put_object(&p, hdr_constructed, hdr_len,
252 asn1_tags.imp_tag, asn1_tags.imp_class);
253 }
254
255 /* Copy across original encoding */
256 memcpy(p, cpy_start, cpy_len);
257
258 cp = new_der;
259
260 /* Obtain new ASN1_TYPE structure */
261 ret = d2i_ASN1_TYPE(NULL, &cp, len);
262
263 err:
264 free(orig_der);
265 free(new_der);
266
267 return ret;
268 }
269
270 static int
asn1_cb(const char * elem,int len,void * bitstr)271 asn1_cb(const char *elem, int len, void *bitstr)
272 {
273 tag_exp_arg *arg = bitstr;
274 int i;
275 int utype;
276 int vlen = 0;
277 const char *p, *vstart = NULL;
278
279 int tmp_tag, tmp_class;
280
281 for (i = 0, p = elem; i < len; p++, i++) {
282 /* Look for the ':' in name value pairs */
283 if (*p == ':') {
284 vstart = p + 1;
285 vlen = len - (vstart - elem);
286 len = p - elem;
287 break;
288 }
289 }
290
291 utype = asn1_str2tag(elem, len);
292
293 if (utype == -1) {
294 ASN1error(ASN1_R_UNKNOWN_TAG);
295 ERR_asprintf_error_data("tag=%s", elem);
296 return -1;
297 }
298
299 /* If this is not a modifier mark end of string and exit */
300 if (!(utype & ASN1_GEN_FLAG)) {
301 arg->utype = utype;
302 arg->str = vstart;
303 /* If no value and not end of string, error */
304 if (!vstart && elem[len]) {
305 ASN1error(ASN1_R_MISSING_VALUE);
306 return -1;
307 }
308 return 0;
309 }
310
311 switch (utype) {
312
313 case ASN1_GEN_FLAG_IMP:
314 /* Check for illegal multiple IMPLICIT tagging */
315 if (arg->imp_tag != -1) {
316 ASN1error(ASN1_R_ILLEGAL_NESTED_TAGGING);
317 return -1;
318 }
319 if (!parse_tagging(vstart, vlen, &arg->imp_tag,
320 &arg->imp_class))
321 return -1;
322 break;
323
324 case ASN1_GEN_FLAG_EXP:
325 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
326 return -1;
327 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
328 return -1;
329 break;
330
331 case ASN1_GEN_FLAG_SEQWRAP:
332 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
333 return -1;
334 break;
335
336 case ASN1_GEN_FLAG_SETWRAP:
337 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
338 return -1;
339 break;
340
341 case ASN1_GEN_FLAG_BITWRAP:
342 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
343 return -1;
344 break;
345
346 case ASN1_GEN_FLAG_OCTWRAP:
347 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
348 return -1;
349 break;
350
351 case ASN1_GEN_FLAG_FORMAT:
352 if (vstart == NULL) {
353 ASN1error(ASN1_R_ILLEGAL_FORMAT);
354 return -1;
355 }
356 if (!strncmp(vstart, "ASCII", 5))
357 arg->format = ASN1_GEN_FORMAT_ASCII;
358 else if (!strncmp(vstart, "UTF8", 4))
359 arg->format = ASN1_GEN_FORMAT_UTF8;
360 else if (!strncmp(vstart, "HEX", 3))
361 arg->format = ASN1_GEN_FORMAT_HEX;
362 else if (!strncmp(vstart, "BITLIST", 7))
363 arg->format = ASN1_GEN_FORMAT_BITLIST;
364 else {
365 ASN1error(ASN1_R_UNKOWN_FORMAT);
366 return -1;
367 }
368 break;
369
370 }
371
372 return 1;
373 }
374
375 static int
parse_tagging(const char * vstart,int vlen,int * ptag,int * pclass)376 parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
377 {
378 long tag_num;
379 char *eptr;
380
381 if (!vstart)
382 return 0;
383 tag_num = strtoul(vstart, &eptr, 10);
384 /* Check we haven't gone past max length: should be impossible */
385 if (eptr && *eptr && (eptr > vstart + vlen))
386 return 0;
387 if (tag_num < 0) {
388 ASN1error(ASN1_R_INVALID_NUMBER);
389 return 0;
390 }
391 *ptag = tag_num;
392 /* If we have non numeric characters, parse them */
393 if (eptr)
394 vlen -= eptr - vstart;
395 else
396 vlen = 0;
397 if (vlen) {
398 switch (*eptr) {
399
400 case 'U':
401 *pclass = V_ASN1_UNIVERSAL;
402 break;
403
404 case 'A':
405 *pclass = V_ASN1_APPLICATION;
406 break;
407
408 case 'P':
409 *pclass = V_ASN1_PRIVATE;
410 break;
411
412 case 'C':
413 *pclass = V_ASN1_CONTEXT_SPECIFIC;
414 break;
415
416 default:
417 ASN1error(ASN1_R_INVALID_MODIFIER);
418 ERR_asprintf_error_data("Char=%c", *eptr);
419 return 0;
420 break;
421
422 }
423 } else
424 *pclass = V_ASN1_CONTEXT_SPECIFIC;
425
426 return 1;
427
428 }
429
430 /* Handle multiple types: SET and SEQUENCE */
431
432 static ASN1_TYPE *
asn1_multi(int utype,const char * section,X509V3_CTX * cnf)433 asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
434 {
435 ASN1_TYPE *ret = NULL;
436 STACK_OF(ASN1_TYPE) *sk = NULL;
437 STACK_OF(CONF_VALUE) *sect = NULL;
438 unsigned char *der = NULL;
439 int derlen;
440 int i;
441 sk = sk_ASN1_TYPE_new_null();
442 if (!sk)
443 goto bad;
444 if (section) {
445 if (!cnf)
446 goto bad;
447 sect = X509V3_get_section(cnf, (char *)section);
448 if (!sect)
449 goto bad;
450 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
451 ASN1_TYPE *typ = ASN1_generate_v3(
452 sk_CONF_VALUE_value(sect, i)->value, cnf);
453 if (!typ)
454 goto bad;
455 if (!sk_ASN1_TYPE_push(sk, typ))
456 goto bad;
457 }
458 }
459
460 /* Now we has a STACK of the components, convert to the correct form */
461
462 if (utype == V_ASN1_SET)
463 derlen = i2d_ASN1_SET_ANY(sk, &der);
464 else
465 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);
466
467 if (derlen < 0)
468 goto bad;
469
470 if (!(ret = ASN1_TYPE_new()))
471 goto bad;
472
473 if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
474 goto bad;
475
476 ret->type = utype;
477
478 ret->value.asn1_string->data = der;
479 ret->value.asn1_string->length = derlen;
480
481 der = NULL;
482
483 bad:
484 free(der);
485 if (sk)
486 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
487 if (sect)
488 X509V3_section_free(cnf, sect);
489
490 return ret;
491 }
492
493 static int
append_exp(tag_exp_arg * arg,int exp_tag,int exp_class,int exp_constructed,int exp_pad,int imp_ok)494 append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed,
495 int exp_pad, int imp_ok)
496 {
497 tag_exp_type *exp_tmp;
498
499 /* Can only have IMPLICIT if permitted */
500 if ((arg->imp_tag != -1) && !imp_ok) {
501 ASN1error(ASN1_R_ILLEGAL_IMPLICIT_TAG);
502 return 0;
503 }
504
505 if (arg->exp_count == ASN1_FLAG_EXP_MAX) {
506 ASN1error(ASN1_R_DEPTH_EXCEEDED);
507 return 0;
508 }
509
510 exp_tmp = &arg->exp_list[arg->exp_count++];
511
512 /* If IMPLICIT set tag to implicit value then
513 * reset implicit tag since it has been used.
514 */
515 if (arg->imp_tag != -1) {
516 exp_tmp->exp_tag = arg->imp_tag;
517 exp_tmp->exp_class = arg->imp_class;
518 arg->imp_tag = -1;
519 arg->imp_class = -1;
520 } else {
521 exp_tmp->exp_tag = exp_tag;
522 exp_tmp->exp_class = exp_class;
523 }
524 exp_tmp->exp_constructed = exp_constructed;
525 exp_tmp->exp_pad = exp_pad;
526
527 return 1;
528 }
529
530 static int
asn1_str2tag(const char * tagstr,int len)531 asn1_str2tag(const char *tagstr, int len)
532 {
533 unsigned int i;
534 static const struct tag_name_st *tntmp, tnst [] = {
535 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
536 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
537 ASN1_GEN_STR("NULL", V_ASN1_NULL),
538 ASN1_GEN_STR("INT", V_ASN1_INTEGER),
539 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
540 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
541 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
542 ASN1_GEN_STR("OID", V_ASN1_OBJECT),
543 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
544 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
545 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
546 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
547 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
548 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
549 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
550 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
551 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
552 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
553 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
554 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
555 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
556 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
557 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
558 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
559 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
560 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
561 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
562 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
563 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
564 ASN1_GEN_STR("T61", V_ASN1_T61STRING),
565 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
566 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
567 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
568 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
569 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
570 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),
571
572 /* Special cases */
573 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
574 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
575 ASN1_GEN_STR("SET", V_ASN1_SET),
576 /* type modifiers */
577 /* Explicit tag */
578 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
579 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
580 /* Implicit tag */
581 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
582 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
583 /* OCTET STRING wrapper */
584 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
585 /* SEQUENCE wrapper */
586 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
587 /* SET wrapper */
588 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
589 /* BIT STRING wrapper */
590 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
591 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
592 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
593 };
594
595 if (len == -1)
596 len = strlen(tagstr);
597
598 tntmp = tnst;
599 for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st);
600 i++, tntmp++) {
601 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
602 return tntmp->tag;
603 }
604
605 return -1;
606 }
607
608 static ASN1_TYPE *
asn1_str2type(const char * str,int format,int utype)609 asn1_str2type(const char *str, int format, int utype)
610 {
611 ASN1_TYPE *atmp = NULL;
612 CONF_VALUE vtmp;
613 unsigned char *rdata;
614 long rdlen;
615 int no_unused = 1;
616
617 if (!(atmp = ASN1_TYPE_new())) {
618 ASN1error(ERR_R_MALLOC_FAILURE);
619 return NULL;
620 }
621
622 if (!str)
623 str = "";
624
625 switch (utype) {
626
627 case V_ASN1_NULL:
628 if (str && *str) {
629 ASN1error(ASN1_R_ILLEGAL_NULL_VALUE);
630 goto bad_form;
631 }
632 break;
633
634 case V_ASN1_BOOLEAN:
635 if (format != ASN1_GEN_FORMAT_ASCII) {
636 ASN1error(ASN1_R_NOT_ASCII_FORMAT);
637 goto bad_form;
638 }
639 vtmp.name = NULL;
640 vtmp.section = NULL;
641 vtmp.value = (char *)str;
642 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) {
643 ASN1error(ASN1_R_ILLEGAL_BOOLEAN);
644 goto bad_str;
645 }
646 break;
647
648 case V_ASN1_INTEGER:
649 case V_ASN1_ENUMERATED:
650 if (format != ASN1_GEN_FORMAT_ASCII) {
651 ASN1error(ASN1_R_INTEGER_NOT_ASCII_FORMAT);
652 goto bad_form;
653 }
654 if (!(atmp->value.integer =
655 s2i_ASN1_INTEGER(NULL, (char *)str))) {
656 ASN1error(ASN1_R_ILLEGAL_INTEGER);
657 goto bad_str;
658 }
659 break;
660
661 case V_ASN1_OBJECT:
662 if (format != ASN1_GEN_FORMAT_ASCII) {
663 ASN1error(ASN1_R_OBJECT_NOT_ASCII_FORMAT);
664 goto bad_form;
665 }
666 if (!(atmp->value.object = OBJ_txt2obj(str, 0))) {
667 ASN1error(ASN1_R_ILLEGAL_OBJECT);
668 goto bad_str;
669 }
670 break;
671
672 case V_ASN1_UTCTIME:
673 case V_ASN1_GENERALIZEDTIME:
674 if (format != ASN1_GEN_FORMAT_ASCII) {
675 ASN1error(ASN1_R_TIME_NOT_ASCII_FORMAT);
676 goto bad_form;
677 }
678 if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
679 ASN1error(ERR_R_MALLOC_FAILURE);
680 goto bad_str;
681 }
682 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) {
683 ASN1error(ERR_R_MALLOC_FAILURE);
684 goto bad_str;
685 }
686 atmp->value.asn1_string->type = utype;
687 if (!ASN1_TIME_check(atmp->value.asn1_string)) {
688 ASN1error(ASN1_R_ILLEGAL_TIME_VALUE);
689 goto bad_str;
690 }
691 break;
692
693 case V_ASN1_BMPSTRING:
694 case V_ASN1_PRINTABLESTRING:
695 case V_ASN1_IA5STRING:
696 case V_ASN1_T61STRING:
697 case V_ASN1_UTF8STRING:
698 case V_ASN1_VISIBLESTRING:
699 case V_ASN1_UNIVERSALSTRING:
700 case V_ASN1_GENERALSTRING:
701 case V_ASN1_NUMERICSTRING:
702
703 if (format == ASN1_GEN_FORMAT_ASCII)
704 format = MBSTRING_ASC;
705 else if (format == ASN1_GEN_FORMAT_UTF8)
706 format = MBSTRING_UTF8;
707 else {
708 ASN1error(ASN1_R_ILLEGAL_FORMAT);
709 goto bad_form;
710 }
711
712 if (ASN1_mbstring_copy(&atmp->value.asn1_string,
713 (unsigned char *)str, -1, format,
714 ASN1_tag2bit(utype)) <= 0) {
715 ASN1error(ERR_R_MALLOC_FAILURE);
716 goto bad_str;
717 }
718 break;
719
720 case V_ASN1_BIT_STRING:
721 case V_ASN1_OCTET_STRING:
722 if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
723 ASN1error(ERR_R_MALLOC_FAILURE);
724 goto bad_form;
725 }
726
727 if (format == ASN1_GEN_FORMAT_HEX) {
728
729 if (!(rdata = string_to_hex((char *)str, &rdlen))) {
730 ASN1error(ASN1_R_ILLEGAL_HEX);
731 goto bad_str;
732 }
733
734 atmp->value.asn1_string->data = rdata;
735 atmp->value.asn1_string->length = rdlen;
736 atmp->value.asn1_string->type = utype;
737
738 } else if (format == ASN1_GEN_FORMAT_ASCII) {
739 if (ASN1_STRING_set(atmp->value.asn1_string, str,
740 -1) == 0) {
741 ASN1error(ERR_R_MALLOC_FAILURE);
742 goto bad_str;
743 }
744 } else if ((format == ASN1_GEN_FORMAT_BITLIST) &&
745 (utype == V_ASN1_BIT_STRING)) {
746 if (!CONF_parse_list(str, ',', 1, bitstr_cb,
747 atmp->value.bit_string)) {
748 ASN1error(ASN1_R_LIST_ERROR);
749 goto bad_str;
750 }
751 no_unused = 0;
752
753 } else {
754 ASN1error(ASN1_R_ILLEGAL_BITSTRING_FORMAT);
755 goto bad_form;
756 }
757
758 if ((utype == V_ASN1_BIT_STRING) && no_unused) {
759 if (!asn1_abs_set_unused_bits(atmp->value.asn1_string,
760 0))
761 goto bad_str;
762 }
763
764 break;
765
766 default:
767 ASN1error(ASN1_R_UNSUPPORTED_TYPE);
768 goto bad_str;
769 break;
770 }
771
772 atmp->type = utype;
773 return atmp;
774
775 bad_str:
776 ERR_asprintf_error_data("string=%s", str);
777 bad_form:
778 ASN1_TYPE_free(atmp);
779 return NULL;
780 }
781
782 static int
bitstr_cb(const char * elem,int len,void * bitstr)783 bitstr_cb(const char *elem, int len, void *bitstr)
784 {
785 long bitnum;
786 char *eptr;
787
788 if (!elem)
789 return 0;
790 bitnum = strtoul(elem, &eptr, 10);
791 if (eptr && *eptr && (eptr != elem + len))
792 return 0;
793 if (bitnum < 0) {
794 ASN1error(ASN1_R_INVALID_NUMBER);
795 return 0;
796 }
797 if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) {
798 ASN1error(ERR_R_MALLOC_FAILURE);
799 return 0;
800 }
801 return 1;
802 }
803