1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57#include <openssl/x509.h>
58
59#include <string.h>
60
61#include <openssl/asn1.h>
62#include <openssl/err.h>
63#include <openssl/mem.h>
64#include <openssl/obj.h>
65#include <openssl/x509v3.h>
66
67#include "../internal.h"
68#include "../x509v3/internal.h"
69
70/*
71 * Although this file is in crypto/x509 for layering purposes, it emits
72 * errors from the ASN.1 module for OpenSSL compatibility.
73 */
74
75#define ASN1_GEN_FLAG 0x10000
76#define ASN1_GEN_FLAG_IMP (ASN1_GEN_FLAG|1)
77#define ASN1_GEN_FLAG_EXP (ASN1_GEN_FLAG|2)
78#define ASN1_GEN_FLAG_TAG (ASN1_GEN_FLAG|3)
79#define ASN1_GEN_FLAG_BITWRAP (ASN1_GEN_FLAG|4)
80#define ASN1_GEN_FLAG_OCTWRAP (ASN1_GEN_FLAG|5)
81#define ASN1_GEN_FLAG_SEQWRAP (ASN1_GEN_FLAG|6)
82#define ASN1_GEN_FLAG_SETWRAP (ASN1_GEN_FLAG|7)
83#define ASN1_GEN_FLAG_FORMAT (ASN1_GEN_FLAG|8)
84
85#define ASN1_GEN_STR(str,val) {str, sizeof(str) - 1, val}
86
87#define ASN1_FLAG_EXP_MAX 20
88/* Maximum number of nested sequences */
89#define ASN1_GEN_SEQ_MAX_DEPTH 50
90
91/* Input formats */
92
93/* ASCII: default */
94#define ASN1_GEN_FORMAT_ASCII 1
95/* UTF8 */
96#define ASN1_GEN_FORMAT_UTF8 2
97/* Hex */
98#define ASN1_GEN_FORMAT_HEX 3
99/* List of bits */
100#define ASN1_GEN_FORMAT_BITLIST 4
101
102struct tag_name_st {
103 const char *strnam;
104 int len;
105 int tag;
106};
107
108typedef struct {
109 int exp_tag;
110 int exp_class;
111 int exp_constructed;
112 int exp_pad;
113 long exp_len;
114} tag_exp_type;
115
116typedef struct {
117 int imp_tag;
118 int imp_class;
119 int utype;
120 int format;
121 const char *str;
122 tag_exp_type exp_list[ASN1_FLAG_EXP_MAX];
123 int exp_count;
124} tag_exp_arg;
125
126static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth,
127 int *perr);
128static int bitstr_cb(const char *elem, int len, void *bitstr);
129static int asn1_cb(const char *elem, int len, void *bitstr);
130static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
131 int exp_constructed, int exp_pad, int imp_ok);
132static int parse_tagging(const char *vstart, int vlen, int *ptag,
133 int *pclass);
134static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf,
135 int depth, int *perr);
136static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype);
137static int asn1_str2tag(const char *tagstr, int len);
138
139ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf)
140{
141 X509V3_CTX cnf;
142
143 if (!nconf)
144 return ASN1_generate_v3(str, NULL);
145
146 X509V3_set_nconf(&cnf, nconf);
147 return ASN1_generate_v3(str, &cnf);
148}
149
150ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf)
151{
152 int err = 0;
153 ASN1_TYPE *ret = generate_v3(str, cnf, 0, &err);
154 if (err)
155 OPENSSL_PUT_ERROR(ASN1, err);
156 return ret;
157}
158
159static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth,
160 int *perr)
161{
162 ASN1_TYPE *ret;
163 tag_exp_arg asn1_tags;
164 tag_exp_type *etmp;
165
166 int i, len;
167
168 unsigned char *orig_der = NULL, *new_der = NULL;
169 const unsigned char *cpy_start;
170 unsigned char *p;
171 const unsigned char *cp;
172 int cpy_len;
173 long hdr_len = 0;
174 int hdr_constructed = 0, hdr_tag, hdr_class;
175 int r;
176
177 asn1_tags.imp_tag = -1;
178 asn1_tags.imp_class = -1;
179 asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
180 asn1_tags.exp_count = 0;
181 if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0) {
182 *perr = ASN1_R_UNKNOWN_TAG;
183 return NULL;
184 }
185
186 if ((asn1_tags.utype == V_ASN1_SEQUENCE)
187 || (asn1_tags.utype == V_ASN1_SET)) {
188 if (!cnf) {
189 *perr = ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG;
190 return NULL;
191 }
192 if (depth >= ASN1_GEN_SEQ_MAX_DEPTH) {
193 *perr = ASN1_R_ILLEGAL_NESTED_TAGGING;
194 return NULL;
195 }
196 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf, depth, perr);
197 } else
198 ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype);
199
200 if (!ret)
201 return NULL;
202
203 /* If no tagging return base type */
204 if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0))
205 return ret;
206
207 /* Generate the encoding */
208 cpy_len = i2d_ASN1_TYPE(ret, &orig_der);
209 ASN1_TYPE_free(ret);
210 ret = NULL;
211 /* Set point to start copying for modified encoding */
212 cpy_start = orig_der;
213
214 /* Do we need IMPLICIT tagging? */
215 if (asn1_tags.imp_tag != -1) {
216 /* If IMPLICIT we will replace the underlying tag */
217 /* Skip existing tag+len */
218 r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class,
219 cpy_len);
220 if (r & 0x80)
221 goto err;
222 /* Update copy length */
223 cpy_len -= cpy_start - orig_der;
224 /*
225 * For IMPLICIT tagging the length should match the original length
226 * and constructed flag should be consistent.
227 */
228 if (r & 0x1) {
229 /* Indefinite length constructed */
230 hdr_constructed = 2;
231 hdr_len = 0;
232 } else
233 /* Just retain constructed flag */
234 hdr_constructed = r & V_ASN1_CONSTRUCTED;
235 /*
236 * Work out new length with IMPLICIT tag: ignore constructed because
237 * it will mess up if indefinite length
238 */
239 len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag);
240 } else
241 len = cpy_len;
242
243 /* Work out length in any EXPLICIT, starting from end */
244
245 for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1;
246 i < asn1_tags.exp_count; i++, etmp--) {
247 /* Content length: number of content octets + any padding */
248 len += etmp->exp_pad;
249 etmp->exp_len = len;
250 /* Total object length: length including new header */
251 len = ASN1_object_size(0, len, etmp->exp_tag);
252 }
253
254 /* Allocate buffer for new encoding */
255
256 new_der = OPENSSL_malloc(len);
257 if (!new_der)
258 goto err;
259
260 /* Generate tagged encoding */
261
262 p = new_der;
263
264 /* Output explicit tags first */
265
266 for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count;
267 i++, etmp++) {
268 ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,
269 etmp->exp_tag, etmp->exp_class);
270 if (etmp->exp_pad)
271 *p++ = 0;
272 }
273
274 /* If IMPLICIT, output tag */
275
276 if (asn1_tags.imp_tag != -1) {
277 if (asn1_tags.imp_class == V_ASN1_UNIVERSAL
278 && (asn1_tags.imp_tag == V_ASN1_SEQUENCE
279 || asn1_tags.imp_tag == V_ASN1_SET))
280 hdr_constructed = V_ASN1_CONSTRUCTED;
281 ASN1_put_object(&p, hdr_constructed, hdr_len,
282 asn1_tags.imp_tag, asn1_tags.imp_class);
283 }
284
285 /* Copy across original encoding */
286 OPENSSL_memcpy(p, cpy_start, cpy_len);
287
288 cp = new_der;
289
290 /* Obtain new ASN1_TYPE structure */
291 ret = d2i_ASN1_TYPE(NULL, &cp, len);
292
293 err:
294 if (orig_der)
295 OPENSSL_free(orig_der);
296 if (new_der)
297 OPENSSL_free(new_der);
298
299 return ret;
300
301}
302
303static int asn1_cb(const char *elem, int len, void *bitstr)
304{
305 tag_exp_arg *arg = bitstr;
306 int i;
307 int utype;
308 int vlen = 0;
309 const char *p, *vstart = NULL;
310
311 int tmp_tag, tmp_class;
312
313 if (elem == NULL)
314 return -1;
315
316 for (i = 0, p = elem; i < len; p++, i++) {
317 /* Look for the ':' in name value pairs */
318 if (*p == ':') {
319 vstart = p + 1;
320 vlen = len - (vstart - elem);
321 len = p - elem;
322 break;
323 }
324 }
325
326 utype = asn1_str2tag(elem, len);
327
328 if (utype == -1) {
329 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_TAG);
330 ERR_add_error_data(2, "tag=", elem);
331 return -1;
332 }
333
334 /* If this is not a modifier mark end of string and exit */
335 if (!(utype & ASN1_GEN_FLAG)) {
336 arg->utype = utype;
337 arg->str = vstart;
338 /* If no value and not end of string, error */
339 if (!vstart && elem[len]) {
340 OPENSSL_PUT_ERROR(ASN1, ASN1_R_MISSING_VALUE);
341 return -1;
342 }
343 return 0;
344 }
345
346 switch (utype) {
347
348 case ASN1_GEN_FLAG_IMP:
349 /* Check for illegal multiple IMPLICIT tagging */
350 if (arg->imp_tag != -1) {
351 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_NESTED_TAGGING);
352 return -1;
353 }
354 if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
355 return -1;
356 break;
357
358 case ASN1_GEN_FLAG_EXP:
359
360 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
361 return -1;
362 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
363 return -1;
364 break;
365
366 case ASN1_GEN_FLAG_SEQWRAP:
367 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
368 return -1;
369 break;
370
371 case ASN1_GEN_FLAG_SETWRAP:
372 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
373 return -1;
374 break;
375
376 case ASN1_GEN_FLAG_BITWRAP:
377 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
378 return -1;
379 break;
380
381 case ASN1_GEN_FLAG_OCTWRAP:
382 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
383 return -1;
384 break;
385
386 case ASN1_GEN_FLAG_FORMAT:
387 if (!vstart) {
388 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_FORMAT);
389 return -1;
390 }
391 if (!strncmp(vstart, "ASCII", 5))
392 arg->format = ASN1_GEN_FORMAT_ASCII;
393 else if (!strncmp(vstart, "UTF8", 4))
394 arg->format = ASN1_GEN_FORMAT_UTF8;
395 else if (!strncmp(vstart, "HEX", 3))
396 arg->format = ASN1_GEN_FORMAT_HEX;
397 else if (!strncmp(vstart, "BITLIST", 7))
398 arg->format = ASN1_GEN_FORMAT_BITLIST;
399 else {
400 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_FORMAT);
401 return -1;
402 }
403 break;
404
405 }
406
407 return 1;
408
409}
410
411static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
412{
413 char erch[2];
414 long tag_num;
415 char *eptr;
416 if (!vstart)
417 return 0;
418 tag_num = strtoul(vstart, &eptr, 10);
419 /* Check we haven't gone past max length: should be impossible */
420 if (eptr && *eptr && (eptr > vstart + vlen))
421 return 0;
422 if (tag_num < 0) {
423 OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_NUMBER);
424 return 0;
425 }
426 *ptag = tag_num;
427 /* If we have non numeric characters, parse them */
428 if (eptr)
429 vlen -= eptr - vstart;
430 else
431 vlen = 0;
432 if (vlen) {
433 switch (*eptr) {
434
435 case 'U':
436 *pclass = V_ASN1_UNIVERSAL;
437 break;
438
439 case 'A':
440 *pclass = V_ASN1_APPLICATION;
441 break;
442
443 case 'P':
444 *pclass = V_ASN1_PRIVATE;
445 break;
446
447 case 'C':
448 *pclass = V_ASN1_CONTEXT_SPECIFIC;
449 break;
450
451 default:
452 erch[0] = *eptr;
453 erch[1] = 0;
454 OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_MODIFIER);
455 ERR_add_error_data(2, "Char=", erch);
456 return 0;
457 break;
458
459 }
460 } else
461 *pclass = V_ASN1_CONTEXT_SPECIFIC;
462
463 return 1;
464
465}
466
467/* Handle multiple types: SET and SEQUENCE */
468
469static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf,
470 int depth, int *perr)
471{
472 ASN1_TYPE *ret = NULL;
473 STACK_OF(ASN1_TYPE) *sk = NULL;
474 STACK_OF(CONF_VALUE) *sect = NULL;
475 unsigned char *der = NULL;
476 int derlen;
477 size_t i;
478 sk = sk_ASN1_TYPE_new_null();
479 if (!sk)
480 goto bad;
481 if (section) {
482 if (!cnf)
483 goto bad;
484 sect = X509V3_get_section(cnf, (char *)section);
485 if (!sect)
486 goto bad;
487 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
488 ASN1_TYPE *typ =
489 generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf,
490 depth + 1, perr);
491 if (!typ)
492 goto bad;
493 if (!sk_ASN1_TYPE_push(sk, typ))
494 goto bad;
495 }
496 }
497
498 /*
499 * Now we has a STACK of the components, convert to the correct form
500 */
501
502 if (utype == V_ASN1_SET)
503 derlen = i2d_ASN1_SET_ANY(sk, &der);
504 else
505 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);
506
507 if (derlen < 0)
508 goto bad;
509
510 if (!(ret = ASN1_TYPE_new()))
511 goto bad;
512
513 if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
514 goto bad;
515
516 ret->type = utype;
517
518 ret->value.asn1_string->data = der;
519 ret->value.asn1_string->length = derlen;
520
521 der = NULL;
522
523 bad:
524
525 if (der)
526 OPENSSL_free(der);
527
528 if (sk)
529 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
530 if (sect)
531 X509V3_section_free(cnf, sect);
532
533 return ret;
534}
535
536static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
537 int exp_constructed, int exp_pad, int imp_ok)
538{
539 tag_exp_type *exp_tmp;
540 /* Can only have IMPLICIT if permitted */
541 if ((arg->imp_tag != -1) && !imp_ok) {
542 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_IMPLICIT_TAG);
543 return 0;
544 }
545
546 if (arg->exp_count == ASN1_FLAG_EXP_MAX) {
547 OPENSSL_PUT_ERROR(ASN1, ASN1_R_DEPTH_EXCEEDED);
548 return 0;
549 }
550
551 exp_tmp = &arg->exp_list[arg->exp_count++];
552
553 /*
554 * If IMPLICIT set tag to implicit value then reset implicit tag since it
555 * has been used.
556 */
557 if (arg->imp_tag != -1) {
558 exp_tmp->exp_tag = arg->imp_tag;
559 exp_tmp->exp_class = arg->imp_class;
560 arg->imp_tag = -1;
561 arg->imp_class = -1;
562 } else {
563 exp_tmp->exp_tag = exp_tag;
564 exp_tmp->exp_class = exp_class;
565 }
566 exp_tmp->exp_constructed = exp_constructed;
567 exp_tmp->exp_pad = exp_pad;
568
569 return 1;
570}
571
572static int asn1_str2tag(const char *tagstr, int len)
573{
574 unsigned int i;
575 static const struct tag_name_st *tntmp, tnst[] = {
576 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
577 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
578 ASN1_GEN_STR("NULL", V_ASN1_NULL),
579 ASN1_GEN_STR("INT", V_ASN1_INTEGER),
580 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
581 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
582 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
583 ASN1_GEN_STR("OID", V_ASN1_OBJECT),
584 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
585 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
586 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
587 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
588 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
589 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
590 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
591 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
592 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
593 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
594 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
595 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
596 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
597 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
598 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
599 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
600 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
601 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
602 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
603 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
604 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
605 ASN1_GEN_STR("T61", V_ASN1_T61STRING),
606 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
607 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
608 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
609 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
610 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
611 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),
612
613 /* Special cases */
614 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
615 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
616 ASN1_GEN_STR("SET", V_ASN1_SET),
617 /* type modifiers */
618 /* Explicit tag */
619 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
620 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
621 /* Implicit tag */
622 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
623 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
624 /* OCTET STRING wrapper */
625 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
626 /* SEQUENCE wrapper */
627 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
628 /* SET wrapper */
629 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
630 /* BIT STRING wrapper */
631 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
632 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
633 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
634 };
635
636 if (len == -1)
637 len = strlen(tagstr);
638
639 tntmp = tnst;
640 for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++) {
641 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
642 return tntmp->tag;
643 }
644
645 return -1;
646}
647
648static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
649{
650 ASN1_TYPE *atmp = NULL;
651
652 CONF_VALUE vtmp;
653
654 unsigned char *rdata;
655 long rdlen;
656
657 int no_unused = 1;
658
659 if (!(atmp = ASN1_TYPE_new())) {
660 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
661 return NULL;
662 }
663
664 if (!str)
665 str = "";
666
667 switch (utype) {
668
669 case V_ASN1_NULL:
670 if (str && *str) {
671 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_NULL_VALUE);
672 goto bad_form;
673 }
674 break;
675
676 case V_ASN1_BOOLEAN:
677 if (format != ASN1_GEN_FORMAT_ASCII) {
678 OPENSSL_PUT_ERROR(ASN1, ASN1_R_NOT_ASCII_FORMAT);
679 goto bad_form;
680 }
681 vtmp.name = NULL;
682 vtmp.section = NULL;
683 vtmp.value = (char *)str;
684 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) {
685 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_BOOLEAN);
686 goto bad_str;
687 }
688 break;
689
690 case V_ASN1_INTEGER:
691 case V_ASN1_ENUMERATED:
692 if (format != ASN1_GEN_FORMAT_ASCII) {
693 OPENSSL_PUT_ERROR(ASN1, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
694 goto bad_form;
695 }
696 if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str))) {
697 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_INTEGER);
698 goto bad_str;
699 }
700 break;
701
702 case V_ASN1_OBJECT:
703 if (format != ASN1_GEN_FORMAT_ASCII) {
704 OPENSSL_PUT_ERROR(ASN1, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
705 goto bad_form;
706 }
707 if (!(atmp->value.object = OBJ_txt2obj(str, 0))) {
708 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_OBJECT);
709 goto bad_str;
710 }
711 break;
712
713 case V_ASN1_UTCTIME:
714 case V_ASN1_GENERALIZEDTIME:
715 if (format != ASN1_GEN_FORMAT_ASCII) {
716 OPENSSL_PUT_ERROR(ASN1, ASN1_R_TIME_NOT_ASCII_FORMAT);
717 goto bad_form;
718 }
719 if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
720 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
721 goto bad_str;
722 }
723 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) {
724 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
725 goto bad_str;
726 }
727 atmp->value.asn1_string->type = utype;
728 if (!ASN1_TIME_check(atmp->value.asn1_string)) {
729 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_TIME_VALUE);
730 goto bad_str;
731 }
732
733 break;
734
735 case V_ASN1_BMPSTRING:
736 case V_ASN1_PRINTABLESTRING:
737 case V_ASN1_IA5STRING:
738 case V_ASN1_T61STRING:
739 case V_ASN1_UTF8STRING:
740 case V_ASN1_VISIBLESTRING:
741 case V_ASN1_UNIVERSALSTRING:
742 case V_ASN1_GENERALSTRING:
743 case V_ASN1_NUMERICSTRING:
744
745 if (format == ASN1_GEN_FORMAT_ASCII)
746 format = MBSTRING_ASC;
747 else if (format == ASN1_GEN_FORMAT_UTF8)
748 format = MBSTRING_UTF8;
749 else {
750 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_FORMAT);
751 goto bad_form;
752 }
753
754 if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
755 -1, format, ASN1_tag2bit(utype)) <= 0) {
756 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
757 goto bad_str;
758 }
759
760 break;
761
762 case V_ASN1_BIT_STRING:
763
764 case V_ASN1_OCTET_STRING:
765
766 if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
767 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
768 goto bad_form;
769 }
770
771 if (format == ASN1_GEN_FORMAT_HEX) {
772
773 if (!(rdata = x509v3_hex_to_bytes((char *)str, &rdlen))) {
774 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_HEX);
775 goto bad_str;
776 }
777
778 atmp->value.asn1_string->data = rdata;
779 atmp->value.asn1_string->length = rdlen;
780 atmp->value.asn1_string->type = utype;
781
782 } else if (format == ASN1_GEN_FORMAT_ASCII)
783 ASN1_STRING_set(atmp->value.asn1_string, str, -1);
784 else if ((format == ASN1_GEN_FORMAT_BITLIST)
785 && (utype == V_ASN1_BIT_STRING)) {
786 if (!CONF_parse_list
787 (str, ',', 1, bitstr_cb, atmp->value.bit_string)) {
788 OPENSSL_PUT_ERROR(ASN1, ASN1_R_LIST_ERROR);
789 goto bad_str;
790 }
791 no_unused = 0;
792
793 } else {
794 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
795 goto bad_form;
796 }
797
798 if ((utype == V_ASN1_BIT_STRING) && no_unused) {
799 atmp->value.asn1_string->flags
800 &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
801 atmp->value.asn1_string->flags |= ASN1_STRING_FLAG_BITS_LEFT;
802 }
803
804 break;
805
806 default:
807 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNSUPPORTED_TYPE);
808 goto bad_str;
809 break;
810 }
811
812 atmp->type = utype;
813 return atmp;
814
815 bad_str:
816 ERR_add_error_data(2, "string=", str);
817 bad_form:
818
819 ASN1_TYPE_free(atmp);
820 return NULL;
821
822}
823
824static int bitstr_cb(const char *elem, int len, void *bitstr)
825{
826 long bitnum;
827 char *eptr;
828 if (!elem)
829 return 0;
830 bitnum = strtoul(elem, &eptr, 10);
831 if (eptr && *eptr && (eptr != elem + len))
832 return 0;
833 if (bitnum < 0) {
834 OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_NUMBER);
835 return 0;
836 }
837 if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) {
838 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
839 return 0;
840 }
841 return 1;
842}
843