1 /* $OpenBSD: asn1_gen.c,v 1.24 2024/08/31 10:03:03 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_local.h"
66 #include "conf_local.h"
67 #include "x509_local.h"
68
69 #define ASN1_GEN_FLAG 0x10000
70 #define ASN1_GEN_FLAG_IMP (ASN1_GEN_FLAG|1)
71 #define ASN1_GEN_FLAG_EXP (ASN1_GEN_FLAG|2)
72 #define ASN1_GEN_FLAG_TAG (ASN1_GEN_FLAG|3)
73 #define ASN1_GEN_FLAG_BITWRAP (ASN1_GEN_FLAG|4)
74 #define ASN1_GEN_FLAG_OCTWRAP (ASN1_GEN_FLAG|5)
75 #define ASN1_GEN_FLAG_SEQWRAP (ASN1_GEN_FLAG|6)
76 #define ASN1_GEN_FLAG_SETWRAP (ASN1_GEN_FLAG|7)
77 #define ASN1_GEN_FLAG_FORMAT (ASN1_GEN_FLAG|8)
78
79 #define ASN1_GEN_STR(str,val){str, sizeof(str) - 1, val}
80
81 #define ASN1_FLAG_EXP_MAX 20
82
83 /* Input formats */
84
85 /* ASCII: default */
86 #define ASN1_GEN_FORMAT_ASCII 1
87 /* UTF8 */
88 #define ASN1_GEN_FORMAT_UTF8 2
89 /* Hex */
90 #define ASN1_GEN_FORMAT_HEX 3
91 /* List of bits */
92 #define ASN1_GEN_FORMAT_BITLIST 4
93
94 struct tag_name_st {
95 const char *strnam;
96 int len;
97 int tag;
98 };
99
100 typedef struct {
101 int exp_tag;
102 int exp_class;
103 int exp_constructed;
104 int exp_pad;
105 long exp_len;
106 } tag_exp_type;
107
108 typedef struct {
109 int imp_tag;
110 int imp_class;
111 int utype;
112 int format;
113 const char *str;
114 tag_exp_type exp_list[ASN1_FLAG_EXP_MAX];
115 int exp_count;
116 } tag_exp_arg;
117
118 static int bitstr_cb(const char *elem, int len, void *bitstr);
119 static int asn1_cb(const char *elem, int len, void *bitstr);
120 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
121 int exp_constructed, int exp_pad, int imp_ok);
122 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass);
123 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf);
124 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype);
125 static int asn1_str2tag(const char *tagstr, int len);
126
127 ASN1_TYPE *
ASN1_generate_nconf(const char * str,CONF * nconf)128 ASN1_generate_nconf(const char *str, CONF *nconf)
129 {
130 X509V3_CTX cnf;
131
132 if (!nconf)
133 return ASN1_generate_v3(str, NULL);
134
135 X509V3_set_nconf(&cnf, nconf);
136 return ASN1_generate_v3(str, &cnf);
137 }
138 LCRYPTO_ALIAS(ASN1_generate_nconf);
139
140 ASN1_TYPE *
ASN1_generate_v3(const char * str,X509V3_CTX * cnf)141 ASN1_generate_v3(const char *str, X509V3_CTX *cnf)
142 {
143 ASN1_TYPE *ret;
144 tag_exp_arg asn1_tags;
145 tag_exp_type *etmp;
146
147 int i, len;
148
149 unsigned char *orig_der = NULL, *new_der = NULL;
150 const unsigned char *cpy_start;
151 unsigned char *p;
152 const unsigned char *cp;
153 int cpy_len;
154 long hdr_len = 0;
155 int hdr_constructed = 0, hdr_tag, hdr_class;
156 int r;
157
158 asn1_tags.imp_tag = -1;
159 asn1_tags.imp_class = -1;
160 asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
161 asn1_tags.exp_count = 0;
162 if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0)
163 return NULL;
164
165 if ((asn1_tags.utype == V_ASN1_SEQUENCE) ||
166 (asn1_tags.utype == V_ASN1_SET)) {
167 if (!cnf) {
168 ASN1error(ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG);
169 return NULL;
170 }
171 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf);
172 } else
173 ret = asn1_str2type(asn1_tags.str, asn1_tags.format,
174 asn1_tags.utype);
175
176 if (!ret)
177 return NULL;
178
179 /* If no tagging return base type */
180 if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0))
181 return ret;
182
183 /* Generate the encoding */
184 cpy_len = i2d_ASN1_TYPE(ret, &orig_der);
185 ASN1_TYPE_free(ret);
186 ret = NULL;
187 /* Set point to start copying for modified encoding */
188 cpy_start = orig_der;
189
190 /* Do we need IMPLICIT tagging? */
191 if (asn1_tags.imp_tag != -1) {
192 /* If IMPLICIT we will replace the underlying tag */
193 /* Skip existing tag+len */
194 r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag,
195 &hdr_class, cpy_len);
196 if (r & 0x80)
197 goto err;
198 /* Update copy length */
199 cpy_len -= cpy_start - orig_der;
200 /* For IMPLICIT tagging the length should match the
201 * original length and constructed flag should be
202 * consistent.
203 */
204 if (r & 0x1) {
205 /* Indefinite length constructed */
206 hdr_constructed = 2;
207 hdr_len = 0;
208 } else
209 /* Just retain constructed flag */
210 hdr_constructed = r & V_ASN1_CONSTRUCTED;
211 /* Work out new length with IMPLICIT tag: ignore constructed
212 * because it will mess up if indefinite length
213 */
214 len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag);
215 } else
216 len = cpy_len;
217
218 /* Work out length in any EXPLICIT, starting from end */
219
220 for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1;
221 i < asn1_tags.exp_count; i++, etmp--) {
222 /* Content length: number of content octets + any padding */
223 len += etmp->exp_pad;
224 etmp->exp_len = len;
225 /* Total object length: length including new header */
226 len = ASN1_object_size(0, len, etmp->exp_tag);
227 }
228
229 /* Allocate buffer for new encoding */
230
231 new_der = malloc(len);
232 if (!new_der)
233 goto err;
234
235 /* Generate tagged encoding */
236 p = new_der;
237
238 /* Output explicit tags first */
239 for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count;
240 i++, etmp++) {
241 ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,
242 etmp->exp_tag, etmp->exp_class);
243 if (etmp->exp_pad)
244 *p++ = 0;
245 }
246
247 /* If IMPLICIT, output tag */
248
249 if (asn1_tags.imp_tag != -1) {
250 if (asn1_tags.imp_class == V_ASN1_UNIVERSAL &&
251 (asn1_tags.imp_tag == V_ASN1_SEQUENCE ||
252 asn1_tags.imp_tag == V_ASN1_SET))
253 hdr_constructed = V_ASN1_CONSTRUCTED;
254 ASN1_put_object(&p, hdr_constructed, hdr_len,
255 asn1_tags.imp_tag, asn1_tags.imp_class);
256 }
257
258 /* Copy across original encoding */
259 memcpy(p, cpy_start, cpy_len);
260
261 cp = new_der;
262
263 /* Obtain new ASN1_TYPE structure */
264 ret = d2i_ASN1_TYPE(NULL, &cp, len);
265
266 err:
267 free(orig_der);
268 free(new_der);
269
270 return ret;
271 }
272 LCRYPTO_ALIAS(ASN1_generate_v3);
273
274 static int
asn1_cb(const char * elem,int len,void * bitstr)275 asn1_cb(const char *elem, int len, void *bitstr)
276 {
277 tag_exp_arg *arg = bitstr;
278 int i;
279 int utype;
280 int vlen = 0;
281 const char *p, *vstart = NULL;
282
283 int tmp_tag, tmp_class;
284
285 for (i = 0, p = elem; i < len; p++, i++) {
286 /* Look for the ':' in name value pairs */
287 if (*p == ':') {
288 vstart = p + 1;
289 vlen = len - (vstart - elem);
290 len = p - elem;
291 break;
292 }
293 }
294
295 utype = asn1_str2tag(elem, len);
296
297 if (utype == -1) {
298 ASN1error(ASN1_R_UNKNOWN_TAG);
299 ERR_asprintf_error_data("tag=%s", elem);
300 return -1;
301 }
302
303 /* If this is not a modifier mark end of string and exit */
304 if (!(utype & ASN1_GEN_FLAG)) {
305 arg->utype = utype;
306 arg->str = vstart;
307 /* If no value and not end of string, error */
308 if (!vstart && elem[len]) {
309 ASN1error(ASN1_R_MISSING_VALUE);
310 return -1;
311 }
312 return 0;
313 }
314
315 switch (utype) {
316
317 case ASN1_GEN_FLAG_IMP:
318 /* Check for illegal multiple IMPLICIT tagging */
319 if (arg->imp_tag != -1) {
320 ASN1error(ASN1_R_ILLEGAL_NESTED_TAGGING);
321 return -1;
322 }
323 if (!parse_tagging(vstart, vlen, &arg->imp_tag,
324 &arg->imp_class))
325 return -1;
326 break;
327
328 case ASN1_GEN_FLAG_EXP:
329 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
330 return -1;
331 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
332 return -1;
333 break;
334
335 case ASN1_GEN_FLAG_SEQWRAP:
336 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
337 return -1;
338 break;
339
340 case ASN1_GEN_FLAG_SETWRAP:
341 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
342 return -1;
343 break;
344
345 case ASN1_GEN_FLAG_BITWRAP:
346 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
347 return -1;
348 break;
349
350 case ASN1_GEN_FLAG_OCTWRAP:
351 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
352 return -1;
353 break;
354
355 case ASN1_GEN_FLAG_FORMAT:
356 if (vstart == NULL) {
357 ASN1error(ASN1_R_ILLEGAL_FORMAT);
358 return -1;
359 }
360 if (!strncmp(vstart, "ASCII", 5))
361 arg->format = ASN1_GEN_FORMAT_ASCII;
362 else if (!strncmp(vstart, "UTF8", 4))
363 arg->format = ASN1_GEN_FORMAT_UTF8;
364 else if (!strncmp(vstart, "HEX", 3))
365 arg->format = ASN1_GEN_FORMAT_HEX;
366 else if (!strncmp(vstart, "BITLIST", 7))
367 arg->format = ASN1_GEN_FORMAT_BITLIST;
368 else {
369 ASN1error(ASN1_R_UNKOWN_FORMAT);
370 return -1;
371 }
372 break;
373
374 }
375
376 return 1;
377 }
378
379 static int
parse_tagging(const char * vstart,int vlen,int * ptag,int * pclass)380 parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
381 {
382 long tag_num;
383 char *eptr;
384
385 if (!vstart)
386 return 0;
387 tag_num = strtoul(vstart, &eptr, 10);
388 /* Check we haven't gone past max length: should be impossible */
389 if (eptr && *eptr && (eptr > vstart + vlen))
390 return 0;
391 if (tag_num < 0) {
392 ASN1error(ASN1_R_INVALID_NUMBER);
393 return 0;
394 }
395 *ptag = tag_num;
396 /* If we have non numeric characters, parse them */
397 if (eptr)
398 vlen -= eptr - vstart;
399 else
400 vlen = 0;
401 if (vlen) {
402 switch (*eptr) {
403
404 case 'U':
405 *pclass = V_ASN1_UNIVERSAL;
406 break;
407
408 case 'A':
409 *pclass = V_ASN1_APPLICATION;
410 break;
411
412 case 'P':
413 *pclass = V_ASN1_PRIVATE;
414 break;
415
416 case 'C':
417 *pclass = V_ASN1_CONTEXT_SPECIFIC;
418 break;
419
420 default:
421 ASN1error(ASN1_R_INVALID_MODIFIER);
422 ERR_asprintf_error_data("Char=%c", *eptr);
423 return 0;
424 break;
425
426 }
427 } else
428 *pclass = V_ASN1_CONTEXT_SPECIFIC;
429
430 return 1;
431
432 }
433
434 /* Handle multiple types: SET and SEQUENCE */
435
436 static ASN1_TYPE *
asn1_multi(int utype,const char * section,X509V3_CTX * cnf)437 asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
438 {
439 ASN1_TYPE *ret = NULL;
440 STACK_OF(ASN1_TYPE) *sk = NULL;
441 STACK_OF(CONF_VALUE) *sect = NULL;
442 unsigned char *der = NULL;
443 int derlen;
444 int i;
445 sk = sk_ASN1_TYPE_new_null();
446 if (!sk)
447 goto bad;
448 if (section) {
449 if (!cnf)
450 goto bad;
451 sect = X509V3_get_section(cnf, (char *)section);
452 if (!sect)
453 goto bad;
454 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
455 ASN1_TYPE *typ = ASN1_generate_v3(
456 sk_CONF_VALUE_value(sect, i)->value, cnf);
457 if (!typ)
458 goto bad;
459 if (!sk_ASN1_TYPE_push(sk, typ))
460 goto bad;
461 }
462 }
463
464 /* Now we has a STACK of the components, convert to the correct form */
465
466 if (utype == V_ASN1_SET)
467 derlen = i2d_ASN1_SET_ANY(sk, &der);
468 else
469 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);
470
471 if (derlen < 0)
472 goto bad;
473
474 if (!(ret = ASN1_TYPE_new()))
475 goto bad;
476
477 if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
478 goto bad;
479
480 ret->type = utype;
481
482 ret->value.asn1_string->data = der;
483 ret->value.asn1_string->length = derlen;
484
485 der = NULL;
486
487 bad:
488 free(der);
489 if (sk)
490 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
491 if (sect)
492 X509V3_section_free(cnf, sect);
493
494 return ret;
495 }
496
497 static int
append_exp(tag_exp_arg * arg,int exp_tag,int exp_class,int exp_constructed,int exp_pad,int imp_ok)498 append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed,
499 int exp_pad, int imp_ok)
500 {
501 tag_exp_type *exp_tmp;
502
503 /* Can only have IMPLICIT if permitted */
504 if ((arg->imp_tag != -1) && !imp_ok) {
505 ASN1error(ASN1_R_ILLEGAL_IMPLICIT_TAG);
506 return 0;
507 }
508
509 if (arg->exp_count == ASN1_FLAG_EXP_MAX) {
510 ASN1error(ASN1_R_DEPTH_EXCEEDED);
511 return 0;
512 }
513
514 exp_tmp = &arg->exp_list[arg->exp_count++];
515
516 /* If IMPLICIT set tag to implicit value then
517 * reset implicit tag since it has been used.
518 */
519 if (arg->imp_tag != -1) {
520 exp_tmp->exp_tag = arg->imp_tag;
521 exp_tmp->exp_class = arg->imp_class;
522 arg->imp_tag = -1;
523 arg->imp_class = -1;
524 } else {
525 exp_tmp->exp_tag = exp_tag;
526 exp_tmp->exp_class = exp_class;
527 }
528 exp_tmp->exp_constructed = exp_constructed;
529 exp_tmp->exp_pad = exp_pad;
530
531 return 1;
532 }
533
534 static int
asn1_str2tag(const char * tagstr,int len)535 asn1_str2tag(const char *tagstr, int len)
536 {
537 unsigned int i;
538 const struct tag_name_st *tntmp;
539 static const struct tag_name_st tnst[] = {
540 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
541 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
542 ASN1_GEN_STR("NULL", V_ASN1_NULL),
543 ASN1_GEN_STR("INT", V_ASN1_INTEGER),
544 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
545 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
546 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
547 ASN1_GEN_STR("OID", V_ASN1_OBJECT),
548 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
549 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
550 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
551 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
552 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
553 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
554 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
555 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
556 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
557 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
558 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
559 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
560 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
561 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
562 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
563 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
564 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
565 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
566 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
567 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
568 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
569 ASN1_GEN_STR("T61", V_ASN1_T61STRING),
570 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
571 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
572 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
573 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
574 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
575 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),
576
577 /* Special cases */
578 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
579 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
580 ASN1_GEN_STR("SET", V_ASN1_SET),
581 /* type modifiers */
582 /* Explicit tag */
583 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
584 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
585 /* Implicit tag */
586 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
587 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
588 /* OCTET STRING wrapper */
589 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
590 /* SEQUENCE wrapper */
591 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
592 /* SET wrapper */
593 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
594 /* BIT STRING wrapper */
595 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
596 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
597 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
598 };
599
600 if (len == -1)
601 len = strlen(tagstr);
602
603 tntmp = tnst;
604 for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st);
605 i++, tntmp++) {
606 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
607 return tntmp->tag;
608 }
609
610 return -1;
611 }
612
613 static ASN1_TYPE *
asn1_str2type(const char * str,int format,int utype)614 asn1_str2type(const char *str, int format, int utype)
615 {
616 ASN1_TYPE *atmp = NULL;
617 CONF_VALUE vtmp;
618 unsigned char *rdata;
619 long rdlen;
620 int no_unused = 1;
621
622 if (!(atmp = ASN1_TYPE_new())) {
623 ASN1error(ERR_R_MALLOC_FAILURE);
624 return NULL;
625 }
626
627 if (!str)
628 str = "";
629
630 switch (utype) {
631
632 case V_ASN1_NULL:
633 if (str && *str) {
634 ASN1error(ASN1_R_ILLEGAL_NULL_VALUE);
635 goto bad_form;
636 }
637 break;
638
639 case V_ASN1_BOOLEAN:
640 if (format != ASN1_GEN_FORMAT_ASCII) {
641 ASN1error(ASN1_R_NOT_ASCII_FORMAT);
642 goto bad_form;
643 }
644 vtmp.name = NULL;
645 vtmp.section = NULL;
646 vtmp.value = (char *)str;
647 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) {
648 ASN1error(ASN1_R_ILLEGAL_BOOLEAN);
649 goto bad_str;
650 }
651 break;
652
653 case V_ASN1_INTEGER:
654 case V_ASN1_ENUMERATED:
655 if (format != ASN1_GEN_FORMAT_ASCII) {
656 ASN1error(ASN1_R_INTEGER_NOT_ASCII_FORMAT);
657 goto bad_form;
658 }
659 if (!(atmp->value.integer =
660 s2i_ASN1_INTEGER(NULL, (char *)str))) {
661 ASN1error(ASN1_R_ILLEGAL_INTEGER);
662 goto bad_str;
663 }
664 break;
665
666 case V_ASN1_OBJECT:
667 if (format != ASN1_GEN_FORMAT_ASCII) {
668 ASN1error(ASN1_R_OBJECT_NOT_ASCII_FORMAT);
669 goto bad_form;
670 }
671 if (!(atmp->value.object = OBJ_txt2obj(str, 0))) {
672 ASN1error(ASN1_R_ILLEGAL_OBJECT);
673 goto bad_str;
674 }
675 break;
676
677 case V_ASN1_UTCTIME:
678 case V_ASN1_GENERALIZEDTIME:
679 if (format != ASN1_GEN_FORMAT_ASCII) {
680 ASN1error(ASN1_R_TIME_NOT_ASCII_FORMAT);
681 goto bad_form;
682 }
683 if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
684 ASN1error(ERR_R_MALLOC_FAILURE);
685 goto bad_str;
686 }
687 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) {
688 ASN1error(ERR_R_MALLOC_FAILURE);
689 goto bad_str;
690 }
691 atmp->value.asn1_string->type = utype;
692 if (!ASN1_TIME_check(atmp->value.asn1_string)) {
693 ASN1error(ASN1_R_ILLEGAL_TIME_VALUE);
694 goto bad_str;
695 }
696 break;
697
698 case V_ASN1_BMPSTRING:
699 case V_ASN1_PRINTABLESTRING:
700 case V_ASN1_IA5STRING:
701 case V_ASN1_T61STRING:
702 case V_ASN1_UTF8STRING:
703 case V_ASN1_VISIBLESTRING:
704 case V_ASN1_UNIVERSALSTRING:
705 case V_ASN1_GENERALSTRING:
706 case V_ASN1_NUMERICSTRING:
707
708 if (format == ASN1_GEN_FORMAT_ASCII)
709 format = MBSTRING_ASC;
710 else if (format == ASN1_GEN_FORMAT_UTF8)
711 format = MBSTRING_UTF8;
712 else {
713 ASN1error(ASN1_R_ILLEGAL_FORMAT);
714 goto bad_form;
715 }
716
717 if (ASN1_mbstring_copy(&atmp->value.asn1_string,
718 (unsigned char *)str, -1, format,
719 ASN1_tag2bit(utype)) <= 0) {
720 ASN1error(ERR_R_MALLOC_FAILURE);
721 goto bad_str;
722 }
723 break;
724
725 case V_ASN1_BIT_STRING:
726 case V_ASN1_OCTET_STRING:
727 if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
728 ASN1error(ERR_R_MALLOC_FAILURE);
729 goto bad_form;
730 }
731
732 if (format == ASN1_GEN_FORMAT_HEX) {
733
734 if (!(rdata = string_to_hex((char *)str, &rdlen))) {
735 ASN1error(ASN1_R_ILLEGAL_HEX);
736 goto bad_str;
737 }
738
739 atmp->value.asn1_string->data = rdata;
740 atmp->value.asn1_string->length = rdlen;
741 atmp->value.asn1_string->type = utype;
742
743 } else if (format == ASN1_GEN_FORMAT_ASCII) {
744 if (ASN1_STRING_set(atmp->value.asn1_string, str,
745 -1) == 0) {
746 ASN1error(ERR_R_MALLOC_FAILURE);
747 goto bad_str;
748 }
749 } else if ((format == ASN1_GEN_FORMAT_BITLIST) &&
750 (utype == V_ASN1_BIT_STRING)) {
751 if (!CONF_parse_list(str, ',', 1, bitstr_cb,
752 atmp->value.bit_string)) {
753 ASN1error(ASN1_R_LIST_ERROR);
754 goto bad_str;
755 }
756 no_unused = 0;
757
758 } else {
759 ASN1error(ASN1_R_ILLEGAL_BITSTRING_FORMAT);
760 goto bad_form;
761 }
762
763 if ((utype == V_ASN1_BIT_STRING) && no_unused) {
764 if (!asn1_abs_set_unused_bits(atmp->value.asn1_string,
765 0))
766 goto bad_str;
767 }
768
769 break;
770
771 default:
772 ASN1error(ASN1_R_UNSUPPORTED_TYPE);
773 goto bad_str;
774 break;
775 }
776
777 atmp->type = utype;
778 return atmp;
779
780 bad_str:
781 ERR_asprintf_error_data("string=%s", str);
782 bad_form:
783 ASN1_TYPE_free(atmp);
784 return NULL;
785 }
786
787 static int
bitstr_cb(const char * elem,int len,void * bitstr)788 bitstr_cb(const char *elem, int len, void *bitstr)
789 {
790 long bitnum;
791 char *eptr;
792
793 if (!elem)
794 return 0;
795 bitnum = strtoul(elem, &eptr, 10);
796 if (eptr && *eptr && (eptr != elem + len))
797 return 0;
798 if (bitnum < 0) {
799 ASN1error(ASN1_R_INVALID_NUMBER);
800 return 0;
801 }
802 if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) {
803 ASN1error(ERR_R_MALLOC_FAILURE);
804 return 0;
805 }
806 return 1;
807 }
808