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[thirdparty/openssl.git] / crypto / asn1 / asn1_gen.c
1 /* asn1_gen.c */
2 /*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 2002.
5 */
6 /* ====================================================================
7 * Copyright (c) 2002 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60 #include "cryptlib.h"
61 #include <openssl/asn1.h>
62 #include <openssl/x509v3.h>
63
64 #define ASN1_GEN_FLAG 0x10000
65 #define ASN1_GEN_FLAG_IMP (ASN1_GEN_FLAG|1)
66 #define ASN1_GEN_FLAG_EXP (ASN1_GEN_FLAG|2)
67 #define ASN1_GEN_FLAG_TAG (ASN1_GEN_FLAG|3)
68 #define ASN1_GEN_FLAG_BITWRAP (ASN1_GEN_FLAG|4)
69 #define ASN1_GEN_FLAG_OCTWRAP (ASN1_GEN_FLAG|5)
70 #define ASN1_GEN_FLAG_SEQWRAP (ASN1_GEN_FLAG|6)
71 #define ASN1_GEN_FLAG_SETWRAP (ASN1_GEN_FLAG|7)
72 #define ASN1_GEN_FLAG_FORMAT (ASN1_GEN_FLAG|8)
73
74 #define ASN1_GEN_STR(str,val) {str, sizeof(str) - 1, val}
75
76 #define ASN1_FLAG_EXP_MAX 20
77 /* Maximum number of nested sequences */
78 #define ASN1_GEN_SEQ_MAX_DEPTH 50
79
80 /* Input formats */
81
82 /* ASCII: default */
83 #define ASN1_GEN_FORMAT_ASCII 1
84 /* UTF8 */
85 #define ASN1_GEN_FORMAT_UTF8 2
86 /* Hex */
87 #define ASN1_GEN_FORMAT_HEX 3
88 /* List of bits */
89 #define ASN1_GEN_FORMAT_BITLIST 4
90
91 struct tag_name_st {
92 const char *strnam;
93 int len;
94 int tag;
95 };
96
97 typedef struct {
98 int exp_tag;
99 int exp_class;
100 int exp_constructed;
101 int exp_pad;
102 long exp_len;
103 } tag_exp_type;
104
105 typedef struct {
106 int imp_tag;
107 int imp_class;
108 int utype;
109 int format;
110 const char *str;
111 tag_exp_type exp_list[ASN1_FLAG_EXP_MAX];
112 int exp_count;
113 } tag_exp_arg;
114
115 static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth,
116 int *perr);
117 static int bitstr_cb(const char *elem, int len, void *bitstr);
118 static int asn1_cb(const char *elem, int len, void *bitstr);
119 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
120 int exp_constructed, int exp_pad, int imp_ok);
121 static int parse_tagging(const char *vstart, int vlen, int *ptag,
122 int *pclass);
123 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf,
124 int depth, int *perr);
125 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype);
126 static int asn1_str2tag(const char *tagstr, int len);
127
128 ASN1_TYPE *ASN1_generate_nconf(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
139 ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf)
140 {
141 int err = 0;
142 ASN1_TYPE *ret = generate_v3(str, cnf, 0, &err);
143 if (err)
144 ASN1err(ASN1_F_ASN1_GENERATE_V3, err);
145 return ret;
146 }
147
148 static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth,
149 int *perr)
150 {
151 ASN1_TYPE *ret;
152 tag_exp_arg asn1_tags;
153 tag_exp_type *etmp;
154
155 int i, len;
156
157 unsigned char *orig_der = NULL, *new_der = NULL;
158 const unsigned char *cpy_start;
159 unsigned char *p;
160 const unsigned char *cp;
161 int cpy_len;
162 long hdr_len;
163 int hdr_constructed = 0, hdr_tag, hdr_class;
164 int r;
165
166 asn1_tags.imp_tag = -1;
167 asn1_tags.imp_class = -1;
168 asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
169 asn1_tags.exp_count = 0;
170 if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0) {
171 *perr = ASN1_R_UNKNOWN_TAG;
172 return NULL;
173 }
174
175 if ((asn1_tags.utype == V_ASN1_SEQUENCE)
176 || (asn1_tags.utype == V_ASN1_SET)) {
177 if (!cnf) {
178 *perr = ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG;
179 return NULL;
180 }
181 if (depth >= ASN1_GEN_SEQ_MAX_DEPTH) {
182 *perr = ASN1_R_ILLEGAL_NESTED_TAGGING;
183 return NULL;
184 }
185 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf, depth, perr);
186 } else
187 ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype);
188
189 if (!ret)
190 return NULL;
191
192 /* If no tagging return base type */
193 if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0))
194 return ret;
195
196 /* Generate the encoding */
197 cpy_len = i2d_ASN1_TYPE(ret, &orig_der);
198 ASN1_TYPE_free(ret);
199 ret = NULL;
200 /* Set point to start copying for modified encoding */
201 cpy_start = orig_der;
202
203 /* Do we need IMPLICIT tagging? */
204 if (asn1_tags.imp_tag != -1) {
205 /* If IMPLICIT we will replace the underlying tag */
206 /* Skip existing tag+len */
207 r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class,
208 cpy_len);
209 if (r & 0x80)
210 goto err;
211 /* Update copy length */
212 cpy_len -= cpy_start - orig_der;
213 /*
214 * For IMPLICIT tagging the length should match the original length
215 * and constructed flag should be consistent.
216 */
217 if (r & 0x1) {
218 /* Indefinite length constructed */
219 hdr_constructed = 2;
220 hdr_len = 0;
221 } else
222 /* Just retain constructed flag */
223 hdr_constructed = r & V_ASN1_CONSTRUCTED;
224 /*
225 * Work out new length with IMPLICIT tag: ignore constructed because
226 * it will mess up if indefinite length
227 */
228 len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag);
229 } else
230 len = cpy_len;
231
232 /* Work out length in any EXPLICIT, starting from end */
233
234 for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1;
235 i < asn1_tags.exp_count; i++, etmp--) {
236 /* Content length: number of content octets + any padding */
237 len += etmp->exp_pad;
238 etmp->exp_len = len;
239 /* Total object length: length including new header */
240 len = ASN1_object_size(0, len, etmp->exp_tag);
241 }
242
243 /* Allocate buffer for new encoding */
244
245 new_der = OPENSSL_malloc(len);
246 if (!new_der)
247 goto err;
248
249 /* Generate tagged encoding */
250
251 p = new_der;
252
253 /* Output explicit tags first */
254
255 for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count;
256 i++, etmp++) {
257 ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,
258 etmp->exp_tag, etmp->exp_class);
259 if (etmp->exp_pad)
260 *p++ = 0;
261 }
262
263 /* If IMPLICIT, output tag */
264
265 if (asn1_tags.imp_tag != -1) {
266 if (asn1_tags.imp_class == V_ASN1_UNIVERSAL
267 && (asn1_tags.imp_tag == V_ASN1_SEQUENCE
268 || asn1_tags.imp_tag == V_ASN1_SET))
269 hdr_constructed = V_ASN1_CONSTRUCTED;
270 ASN1_put_object(&p, hdr_constructed, hdr_len,
271 asn1_tags.imp_tag, asn1_tags.imp_class);
272 }
273
274 /* Copy across original encoding */
275 memcpy(p, cpy_start, cpy_len);
276
277 cp = new_der;
278
279 /* Obtain new ASN1_TYPE structure */
280 ret = d2i_ASN1_TYPE(NULL, &cp, len);
281
282 err:
283 if (orig_der)
284 OPENSSL_free(orig_der);
285 if (new_der)
286 OPENSSL_free(new_der);
287
288 return ret;
289
290 }
291
292 static int asn1_cb(const char *elem, int len, void *bitstr)
293 {
294 tag_exp_arg *arg = bitstr;
295 int i;
296 int utype;
297 int vlen = 0;
298 const char *p, *vstart = NULL;
299
300 int tmp_tag, tmp_class;
301
302 if (elem == NULL)
303 return -1;
304
305 for (i = 0, p = elem; i < len; p++, i++) {
306 /* Look for the ':' in name value pairs */
307 if (*p == ':') {
308 vstart = p + 1;
309 vlen = len - (vstart - elem);
310 len = p - elem;
311 break;
312 }
313 }
314
315 utype = asn1_str2tag(elem, len);
316
317 if (utype == -1) {
318 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG);
319 ERR_add_error_data(2, "tag=", elem);
320 return -1;
321 }
322
323 /* If this is not a modifier mark end of string and exit */
324 if (!(utype & ASN1_GEN_FLAG)) {
325 arg->utype = utype;
326 arg->str = vstart;
327 /* If no value and not end of string, error */
328 if (!vstart && elem[len]) {
329 ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE);
330 return -1;
331 }
332 return 0;
333 }
334
335 switch (utype) {
336
337 case ASN1_GEN_FLAG_IMP:
338 /* Check for illegal multiple IMPLICIT tagging */
339 if (arg->imp_tag != -1) {
340 ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING);
341 return -1;
342 }
343 if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
344 return -1;
345 break;
346
347 case ASN1_GEN_FLAG_EXP:
348
349 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
350 return -1;
351 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
352 return -1;
353 break;
354
355 case ASN1_GEN_FLAG_SEQWRAP:
356 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
357 return -1;
358 break;
359
360 case ASN1_GEN_FLAG_SETWRAP:
361 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
362 return -1;
363 break;
364
365 case ASN1_GEN_FLAG_BITWRAP:
366 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
367 return -1;
368 break;
369
370 case ASN1_GEN_FLAG_OCTWRAP:
371 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
372 return -1;
373 break;
374
375 case ASN1_GEN_FLAG_FORMAT:
376 if (!vstart) {
377 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_FORMAT);
378 return -1;
379 }
380 if (!strncmp(vstart, "ASCII", 5))
381 arg->format = ASN1_GEN_FORMAT_ASCII;
382 else if (!strncmp(vstart, "UTF8", 4))
383 arg->format = ASN1_GEN_FORMAT_UTF8;
384 else if (!strncmp(vstart, "HEX", 3))
385 arg->format = ASN1_GEN_FORMAT_HEX;
386 else if (!strncmp(vstart, "BITLIST", 7))
387 arg->format = ASN1_GEN_FORMAT_BITLIST;
388 else {
389 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_FORMAT);
390 return -1;
391 }
392 break;
393
394 }
395
396 return 1;
397
398 }
399
400 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
401 {
402 char erch[2];
403 long tag_num;
404 char *eptr;
405 if (!vstart)
406 return 0;
407 tag_num = strtoul(vstart, &eptr, 10);
408 /* Check we haven't gone past max length: should be impossible */
409 if (eptr && *eptr && (eptr > vstart + vlen))
410 return 0;
411 if (tag_num < 0) {
412 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER);
413 return 0;
414 }
415 *ptag = tag_num;
416 /* If we have non numeric characters, parse them */
417 if (eptr)
418 vlen -= eptr - vstart;
419 else
420 vlen = 0;
421 if (vlen) {
422 switch (*eptr) {
423
424 case 'U':
425 *pclass = V_ASN1_UNIVERSAL;
426 break;
427
428 case 'A':
429 *pclass = V_ASN1_APPLICATION;
430 break;
431
432 case 'P':
433 *pclass = V_ASN1_PRIVATE;
434 break;
435
436 case 'C':
437 *pclass = V_ASN1_CONTEXT_SPECIFIC;
438 break;
439
440 default:
441 erch[0] = *eptr;
442 erch[1] = 0;
443 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER);
444 ERR_add_error_data(2, "Char=", erch);
445 return 0;
446
447 }
448 } else
449 *pclass = V_ASN1_CONTEXT_SPECIFIC;
450
451 return 1;
452
453 }
454
455 /* Handle multiple types: SET and SEQUENCE */
456
457 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf,
458 int depth, int *perr)
459 {
460 ASN1_TYPE *ret = NULL;
461 STACK_OF(ASN1_TYPE) *sk = NULL;
462 STACK_OF(CONF_VALUE) *sect = NULL;
463 unsigned char *der = NULL;
464 int derlen;
465 int i;
466 sk = sk_ASN1_TYPE_new_null();
467 if (!sk)
468 goto bad;
469 if (section) {
470 if (!cnf)
471 goto bad;
472 sect = X509V3_get_section(cnf, (char *)section);
473 if (!sect)
474 goto bad;
475 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
476 ASN1_TYPE *typ =
477 generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf,
478 depth + 1, perr);
479 if (!typ)
480 goto bad;
481 if (!sk_ASN1_TYPE_push(sk, typ))
482 goto bad;
483 }
484 }
485
486 /*
487 * Now we has a STACK of the components, convert to the correct form
488 */
489
490 if (utype == V_ASN1_SET)
491 derlen = i2d_ASN1_SET_ANY(sk, &der);
492 else
493 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);
494
495 if (derlen < 0)
496 goto bad;
497
498 if (!(ret = ASN1_TYPE_new()))
499 goto bad;
500
501 if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
502 goto bad;
503
504 ret->type = utype;
505
506 ret->value.asn1_string->data = der;
507 ret->value.asn1_string->length = derlen;
508
509 der = NULL;
510
511 bad:
512
513 if (der)
514 OPENSSL_free(der);
515
516 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
517 if (sect)
518 X509V3_section_free(cnf, sect);
519
520 return ret;
521 }
522
523 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
524 int exp_constructed, int exp_pad, int imp_ok)
525 {
526 tag_exp_type *exp_tmp;
527 /* Can only have IMPLICIT if permitted */
528 if ((arg->imp_tag != -1) && !imp_ok) {
529 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);
530 return 0;
531 }
532
533 if (arg->exp_count == ASN1_FLAG_EXP_MAX) {
534 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED);
535 return 0;
536 }
537
538 exp_tmp = &arg->exp_list[arg->exp_count++];
539
540 /*
541 * If IMPLICIT set tag to implicit value then reset implicit tag since it
542 * has been used.
543 */
544 if (arg->imp_tag != -1) {
545 exp_tmp->exp_tag = arg->imp_tag;
546 exp_tmp->exp_class = arg->imp_class;
547 arg->imp_tag = -1;
548 arg->imp_class = -1;
549 } else {
550 exp_tmp->exp_tag = exp_tag;
551 exp_tmp->exp_class = exp_class;
552 }
553 exp_tmp->exp_constructed = exp_constructed;
554 exp_tmp->exp_pad = exp_pad;
555
556 return 1;
557 }
558
559 static int asn1_str2tag(const char *tagstr, int len)
560 {
561 unsigned int i;
562 static const struct tag_name_st *tntmp, tnst[] = {
563 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
564 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
565 ASN1_GEN_STR("NULL", V_ASN1_NULL),
566 ASN1_GEN_STR("INT", V_ASN1_INTEGER),
567 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
568 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
569 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
570 ASN1_GEN_STR("OID", V_ASN1_OBJECT),
571 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
572 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
573 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
574 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
575 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
576 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
577 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
578 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
579 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
580 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
581 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
582 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
583 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
584 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
585 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
586 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
587 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
588 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
589 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
590 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
591 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
592 ASN1_GEN_STR("T61", V_ASN1_T61STRING),
593 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
594 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
595 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
596 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
597 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
598 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),
599
600 /* Special cases */
601 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
602 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
603 ASN1_GEN_STR("SET", V_ASN1_SET),
604 /* type modifiers */
605 /* Explicit tag */
606 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
607 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
608 /* Implicit tag */
609 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
610 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
611 /* OCTET STRING wrapper */
612 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
613 /* SEQUENCE wrapper */
614 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
615 /* SET wrapper */
616 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
617 /* BIT STRING wrapper */
618 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
619 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
620 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
621 };
622
623 if (len == -1)
624 len = strlen(tagstr);
625
626 tntmp = tnst;
627 for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++) {
628 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
629 return tntmp->tag;
630 }
631
632 return -1;
633 }
634
635 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
636 {
637 ASN1_TYPE *atmp = NULL;
638
639 CONF_VALUE vtmp;
640
641 unsigned char *rdata;
642 long rdlen;
643
644 int no_unused = 1;
645
646 if (!(atmp = ASN1_TYPE_new())) {
647 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
648 return NULL;
649 }
650
651 if (!str)
652 str = "";
653
654 switch (utype) {
655
656 case V_ASN1_NULL:
657 if (str && *str) {
658 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
659 goto bad_form;
660 }
661 break;
662
663 case V_ASN1_BOOLEAN:
664 if (format != ASN1_GEN_FORMAT_ASCII) {
665 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
666 goto bad_form;
667 }
668 vtmp.name = NULL;
669 vtmp.section = NULL;
670 vtmp.value = (char *)str;
671 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) {
672 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
673 goto bad_str;
674 }
675 break;
676
677 case V_ASN1_INTEGER:
678 case V_ASN1_ENUMERATED:
679 if (format != ASN1_GEN_FORMAT_ASCII) {
680 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
681 goto bad_form;
682 }
683 if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str))) {
684 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
685 goto bad_str;
686 }
687 break;
688
689 case V_ASN1_OBJECT:
690 if (format != ASN1_GEN_FORMAT_ASCII) {
691 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
692 goto bad_form;
693 }
694 if (!(atmp->value.object = OBJ_txt2obj(str, 0))) {
695 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
696 goto bad_str;
697 }
698 break;
699
700 case V_ASN1_UTCTIME:
701 case V_ASN1_GENERALIZEDTIME:
702 if (format != ASN1_GEN_FORMAT_ASCII) {
703 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
704 goto bad_form;
705 }
706 if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
707 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
708 goto bad_str;
709 }
710 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) {
711 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
712 goto bad_str;
713 }
714 atmp->value.asn1_string->type = utype;
715 if (!ASN1_TIME_check(atmp->value.asn1_string)) {
716 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
717 goto bad_str;
718 }
719
720 break;
721
722 case V_ASN1_BMPSTRING:
723 case V_ASN1_PRINTABLESTRING:
724 case V_ASN1_IA5STRING:
725 case V_ASN1_T61STRING:
726 case V_ASN1_UTF8STRING:
727 case V_ASN1_VISIBLESTRING:
728 case V_ASN1_UNIVERSALSTRING:
729 case V_ASN1_GENERALSTRING:
730 case V_ASN1_NUMERICSTRING:
731
732 if (format == ASN1_GEN_FORMAT_ASCII)
733 format = MBSTRING_ASC;
734 else if (format == ASN1_GEN_FORMAT_UTF8)
735 format = MBSTRING_UTF8;
736 else {
737 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
738 goto bad_form;
739 }
740
741 if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
742 -1, format, ASN1_tag2bit(utype)) <= 0) {
743 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
744 goto bad_str;
745 }
746
747 break;
748
749 case V_ASN1_BIT_STRING:
750
751 case V_ASN1_OCTET_STRING:
752
753 if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
754 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
755 goto bad_form;
756 }
757
758 if (format == ASN1_GEN_FORMAT_HEX) {
759
760 if (!(rdata = string_to_hex((char *)str, &rdlen))) {
761 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
762 goto bad_str;
763 }
764
765 atmp->value.asn1_string->data = rdata;
766 atmp->value.asn1_string->length = rdlen;
767 atmp->value.asn1_string->type = utype;
768
769 } else if (format == ASN1_GEN_FORMAT_ASCII)
770 ASN1_STRING_set(atmp->value.asn1_string, str, -1);
771 else if ((format == ASN1_GEN_FORMAT_BITLIST)
772 && (utype == V_ASN1_BIT_STRING)) {
773 if (!CONF_parse_list
774 (str, ',', 1, bitstr_cb, atmp->value.bit_string)) {
775 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
776 goto bad_str;
777 }
778 no_unused = 0;
779
780 } else {
781 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
782 goto bad_form;
783 }
784
785 if ((utype == V_ASN1_BIT_STRING) && no_unused) {
786 atmp->value.asn1_string->flags
787 &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
788 atmp->value.asn1_string->flags |= ASN1_STRING_FLAG_BITS_LEFT;
789 }
790
791 break;
792
793 default:
794 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
795 goto bad_str;
796 }
797
798 atmp->type = utype;
799 return atmp;
800
801 bad_str:
802 ERR_add_error_data(2, "string=", str);
803 bad_form:
804
805 ASN1_TYPE_free(atmp);
806 return NULL;
807
808 }
809
810 static int bitstr_cb(const char *elem, int len, void *bitstr)
811 {
812 long bitnum;
813 char *eptr;
814 if (!elem)
815 return 0;
816 bitnum = strtoul(elem, &eptr, 10);
817 if (eptr && *eptr && (eptr != elem + len))
818 return 0;
819 if (bitnum < 0) {
820 ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
821 return 0;
822 }
823 if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) {
824 ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
825 return 0;
826 }
827 return 1;
828 }
829
830 static int mask_cb(const char *elem, int len, void *arg)
831 {
832 unsigned long *pmask = arg, tmpmask;
833 int tag;
834 if (elem == NULL)
835 return 0;
836 if (len == 3 && !strncmp(elem, "DIR", 3)) {
837 *pmask |= B_ASN1_DIRECTORYSTRING;
838 return 1;
839 }
840 tag = asn1_str2tag(elem, len);
841 if (!tag || (tag & ASN1_GEN_FLAG))
842 return 0;
843 tmpmask = ASN1_tag2bit(tag);
844 if (!tmpmask)
845 return 0;
846 *pmask |= tmpmask;
847 return 1;
848 }
849
850 int ASN1_str2mask(const char *str, unsigned long *pmask)
851 {
852 *pmask = 0;
853 return CONF_parse_list(str, '|', 1, mask_cb, pmask);
854 }
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