1 /* asn1_gen.c */
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 "cryptlib.h"
60 #include <openssl/asn1.h>
61 #include <openssl/x509v3.h>
62
63 #define ASN1_GEN_FLAG 0x10000
64 #define ASN1_GEN_FLAG_IMP (ASN1_GEN_FLAG|1)
65 #define ASN1_GEN_FLAG_EXP (ASN1_GEN_FLAG|2)
66 #define ASN1_GEN_FLAG_TAG (ASN1_GEN_FLAG|3)
67 #define ASN1_GEN_FLAG_BITWRAP (ASN1_GEN_FLAG|4)
68 #define ASN1_GEN_FLAG_OCTWRAP (ASN1_GEN_FLAG|5)
69 #define ASN1_GEN_FLAG_SEQWRAP (ASN1_GEN_FLAG|6)
70 #define ASN1_GEN_FLAG_SETWRAP (ASN1_GEN_FLAG|7)
71 #define ASN1_GEN_FLAG_FORMAT (ASN1_GEN_FLAG|8)
72
73 #define ASN1_GEN_STR(str,val) {str, sizeof(str) - 1, val}
74
75 #define ASN1_FLAG_EXP_MAX 20
76
77 /* Input formats */
78
79 /* ASCII: default */
80 #define ASN1_GEN_FORMAT_ASCII 1
81 /* UTF8 */
82 #define ASN1_GEN_FORMAT_UTF8 2
83 /* Hex */
84 #define ASN1_GEN_FORMAT_HEX 3
85 /* List of bits */
86 #define ASN1_GEN_FORMAT_BITLIST 4
87
88
89 struct tag_name_st
90 {
91 const char *strnam;
92 int len;
93 int tag;
94 };
95
96 typedef struct
97 {
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 {
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, int exp_constructed, int exp_pad, int imp_ok);
119 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass);
120 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf);
121 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype);
122 static int asn1_str2tag(const char *tagstr, int len);
123
ASN1_generate_nconf(char * str,CONF * nconf)124 ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf)
125 {
126 X509V3_CTX cnf;
127
128 if (!nconf)
129 return ASN1_generate_v3(str, NULL);
130
131 X509V3_set_nconf(&cnf, nconf);
132 return ASN1_generate_v3(str, &cnf);
133 }
134
ASN1_generate_v3(char * str,X509V3_CTX * cnf)135 ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf)
136 {
137 ASN1_TYPE *ret;
138 tag_exp_arg asn1_tags;
139 tag_exp_type *etmp;
140
141 int i, len;
142
143 unsigned char *orig_der = NULL, *new_der = NULL;
144 const unsigned char *cpy_start;
145 unsigned char *p;
146 const unsigned char *cp;
147 int cpy_len;
148 long hdr_len;
149 int hdr_constructed = 0, hdr_tag, hdr_class;
150 int r;
151
152 asn1_tags.imp_tag = -1;
153 asn1_tags.imp_class = -1;
154 asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
155 asn1_tags.exp_count = 0;
156 if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0)
157 return NULL;
158
159 if ((asn1_tags.utype == V_ASN1_SEQUENCE) || (asn1_tags.utype == V_ASN1_SET))
160 {
161 if (!cnf)
162 {
163 ASN1err(ASN1_F_ASN1_GENERATE_V3, ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG);
164 return NULL;
165 }
166 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf);
167 }
168 else
169 ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype);
170
171 if (!ret)
172 return NULL;
173
174 /* If no tagging return base type */
175 if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0))
176 return ret;
177
178 /* Generate the encoding */
179 cpy_len = i2d_ASN1_TYPE(ret, &orig_der);
180 ASN1_TYPE_free(ret);
181 ret = NULL;
182 /* Set point to start copying for modified encoding */
183 cpy_start = orig_der;
184
185 /* Do we need IMPLICIT tagging? */
186 if (asn1_tags.imp_tag != -1)
187 {
188 /* If IMPLICIT we will replace the underlying tag */
189 /* Skip existing tag+len */
190 r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class, cpy_len);
191 if (r & 0x80)
192 goto err;
193 /* Update copy length */
194 cpy_len -= cpy_start - orig_der;
195 /* For IMPLICIT tagging the length should match the
196 * original length and constructed flag should be
197 * consistent.
198 */
199 if (r & 0x1)
200 {
201 /* Indefinite length constructed */
202 hdr_constructed = 2;
203 hdr_len = 0;
204 }
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 }
213 else
214 len = cpy_len;
215
216 /* Work out length in any EXPLICIT, starting from end */
217
218 for(i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1; i < asn1_tags.exp_count; i++, etmp--)
219 {
220 /* Content length: number of content octets + any padding */
221 len += etmp->exp_pad;
222 etmp->exp_len = len;
223 /* Total object length: length including new header */
224 len = ASN1_object_size(0, len, etmp->exp_tag);
225 }
226
227 /* Allocate buffer for new encoding */
228
229 new_der = OPENSSL_malloc(len);
230
231 /* Generate tagged encoding */
232
233 p = new_der;
234
235 /* Output explicit tags first */
236
237 for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count; i++, etmp++)
238 {
239 ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,
240 etmp->exp_tag, etmp->exp_class);
241 if (etmp->exp_pad)
242 *p++ = 0;
243 }
244
245 /* If IMPLICIT, output tag */
246
247 if (asn1_tags.imp_tag != -1)
248 ASN1_put_object(&p, hdr_constructed, hdr_len,
249 asn1_tags.imp_tag, asn1_tags.imp_class);
250
251 /* Copy across original encoding */
252 memcpy(p, cpy_start, cpy_len);
253
254 cp = new_der;
255
256 /* Obtain new ASN1_TYPE structure */
257 ret = d2i_ASN1_TYPE(NULL, &cp, len);
258
259 err:
260 if (orig_der)
261 OPENSSL_free(orig_der);
262 if (new_der)
263 OPENSSL_free(new_der);
264
265 return ret;
266
267 }
268
asn1_cb(const char * elem,int len,void * bitstr)269 static int asn1_cb(const char *elem, int len, void *bitstr)
270 {
271 tag_exp_arg *arg = bitstr;
272 int i;
273 int utype;
274 int vlen = 0;
275 const char *p, *vstart = NULL;
276
277 int tmp_tag, tmp_class;
278
279 for(i = 0, p = elem; i < len; p++, i++)
280 {
281 /* Look for the ':' in name value pairs */
282 if (*p == ':')
283 {
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 {
295 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG);
296 ERR_add_error_data(2, "tag=", elem);
297 return -1;
298 }
299
300 /* If this is not a modifier mark end of string and exit */
301 if (!(utype & ASN1_GEN_FLAG))
302 {
303 arg->utype = utype;
304 arg->str = vstart;
305 /* If no value and not end of string, error */
306 if (!vstart && elem[len])
307 {
308 ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE);
309 return -1;
310 }
311 return 0;
312 }
313
314 switch(utype)
315 {
316
317 case ASN1_GEN_FLAG_IMP:
318 /* Check for illegal multiple IMPLICIT tagging */
319 if (arg->imp_tag != -1)
320 {
321 ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING);
322 return -1;
323 }
324 if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
325 return -1;
326 break;
327
328 case ASN1_GEN_FLAG_EXP:
329
330 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
331 return -1;
332 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
333 return -1;
334 break;
335
336 case ASN1_GEN_FLAG_SEQWRAP:
337 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
338 return -1;
339 break;
340
341 case ASN1_GEN_FLAG_SETWRAP:
342 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
343 return -1;
344 break;
345
346 case ASN1_GEN_FLAG_BITWRAP:
347 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
348 return -1;
349 break;
350
351 case ASN1_GEN_FLAG_OCTWRAP:
352 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
353 return -1;
354 break;
355
356 case ASN1_GEN_FLAG_FORMAT:
357 if (!strncmp(vstart, "ASCII", 5))
358 arg->format = ASN1_GEN_FORMAT_ASCII;
359 else if (!strncmp(vstart, "UTF8", 4))
360 arg->format = ASN1_GEN_FORMAT_UTF8;
361 else if (!strncmp(vstart, "HEX", 3))
362 arg->format = ASN1_GEN_FORMAT_HEX;
363 else if (!strncmp(vstart, "BITLIST", 3))
364 arg->format = ASN1_GEN_FORMAT_BITLIST;
365 else
366 {
367 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT);
368 return -1;
369 }
370 break;
371
372 }
373
374 return 1;
375
376 }
377
parse_tagging(const char * vstart,int vlen,int * ptag,int * pclass)378 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
379 {
380 char erch[2];
381 long tag_num;
382 char *eptr;
383 if (!vstart)
384 return 0;
385 tag_num = strtoul(vstart, &eptr, 10);
386 /* Check we haven't gone past max length: should be impossible */
387 if (eptr && *eptr && (eptr > vstart + vlen))
388 return 0;
389 if (tag_num < 0)
390 {
391 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER);
392 return 0;
393 }
394 *ptag = tag_num;
395 /* If we have non numeric characters, parse them */
396 if (eptr)
397 vlen -= eptr - vstart;
398 else
399 vlen = 0;
400 if (vlen)
401 {
402 switch (*eptr)
403 {
404
405 case 'U':
406 *pclass = V_ASN1_UNIVERSAL;
407 break;
408
409 case 'A':
410 *pclass = V_ASN1_APPLICATION;
411 break;
412
413 case 'P':
414 *pclass = V_ASN1_PRIVATE;
415 break;
416
417 case 'C':
418 *pclass = V_ASN1_CONTEXT_SPECIFIC;
419 break;
420
421 default:
422 erch[0] = *eptr;
423 erch[1] = 0;
424 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER);
425 ERR_add_error_data(2, "Char=", erch);
426 return 0;
427 break;
428
429 }
430 }
431 else
432 *pclass = V_ASN1_CONTEXT_SPECIFIC;
433
434 return 1;
435
436 }
437
438 /* Handle multiple types: SET and SEQUENCE */
439
asn1_multi(int utype,const char * section,X509V3_CTX * cnf)440 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
441 {
442 ASN1_TYPE *ret = NULL, *typ = NULL;
443 STACK_OF(ASN1_TYPE) *sk = NULL;
444 STACK_OF(CONF_VALUE) *sect = NULL;
445 unsigned char *der = NULL, *p;
446 int derlen;
447 int i, is_set;
448 sk = sk_ASN1_TYPE_new_null();
449 if (section)
450 {
451 if (!cnf)
452 goto bad;
453 sect = X509V3_get_section(cnf, (char *)section);
454 if (!sect)
455 goto bad;
456 for (i = 0; i < sk_CONF_VALUE_num(sect); i++)
457 {
458 typ = ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf);
459 if (!typ)
460 goto bad;
461 sk_ASN1_TYPE_push(sk, typ);
462 typ = NULL;
463 }
464 }
465
466 /* Now we has a STACK of the components, convert to the correct form */
467
468 if (utype == V_ASN1_SET)
469 is_set = 1;
470 else
471 is_set = 0;
472
473
474 derlen = i2d_ASN1_SET_OF_ASN1_TYPE(sk, NULL, i2d_ASN1_TYPE, utype,
475 V_ASN1_UNIVERSAL, is_set);
476 der = OPENSSL_malloc(derlen);
477 p = der;
478 i2d_ASN1_SET_OF_ASN1_TYPE(sk, &p, i2d_ASN1_TYPE, utype,
479 V_ASN1_UNIVERSAL, is_set);
480
481 if (!(ret = ASN1_TYPE_new()))
482 goto bad;
483
484 if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
485 goto bad;
486
487 ret->type = utype;
488
489 ret->value.asn1_string->data = der;
490 ret->value.asn1_string->length = derlen;
491
492 der = NULL;
493
494 bad:
495
496 if (der)
497 OPENSSL_free(der);
498
499 if (sk)
500 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
501 if (typ)
502 ASN1_TYPE_free(typ);
503 if (sect)
504 X509V3_section_free(cnf, sect);
505
506 return ret;
507 }
508
append_exp(tag_exp_arg * arg,int exp_tag,int exp_class,int exp_constructed,int exp_pad,int imp_ok)509 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok)
510 {
511 tag_exp_type *exp_tmp;
512 /* Can only have IMPLICIT if permitted */
513 if ((arg->imp_tag != -1) && !imp_ok)
514 {
515 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);
516 return 0;
517 }
518
519 if (arg->exp_count == ASN1_FLAG_EXP_MAX)
520 {
521 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED);
522 return 0;
523 }
524
525 exp_tmp = &arg->exp_list[arg->exp_count++];
526
527 /* If IMPLICIT set tag to implicit value then
528 * reset implicit tag since it has been used.
529 */
530 if (arg->imp_tag != -1)
531 {
532 exp_tmp->exp_tag = arg->imp_tag;
533 exp_tmp->exp_class = arg->imp_class;
534 arg->imp_tag = -1;
535 arg->imp_class = -1;
536 }
537 else
538 {
539 exp_tmp->exp_tag = exp_tag;
540 exp_tmp->exp_class = exp_class;
541 }
542 exp_tmp->exp_constructed = exp_constructed;
543 exp_tmp->exp_pad = exp_pad;
544
545 return 1;
546 }
547
548
asn1_str2tag(const char * tagstr,int len)549 static int asn1_str2tag(const char *tagstr, int len)
550 {
551 unsigned int i;
552 static struct tag_name_st *tntmp, tnst [] = {
553 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
554 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
555 ASN1_GEN_STR("NULL", V_ASN1_NULL),
556 ASN1_GEN_STR("INT", V_ASN1_INTEGER),
557 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
558 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
559 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
560 ASN1_GEN_STR("OID", V_ASN1_OBJECT),
561 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
562 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
563 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
564 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
565 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
566 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
567 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
568 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
569 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
570 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
571 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
572 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
573 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
574 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
575 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
576 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
577 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
578 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
579 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
580 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
581 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
582 ASN1_GEN_STR("T61", V_ASN1_T61STRING),
583 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
584 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
585 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
586 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
587
588 /* Special cases */
589 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
590 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
591 ASN1_GEN_STR("SET", V_ASN1_SET),
592 /* type modifiers */
593 /* Explicit tag */
594 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
595 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
596 /* Implicit tag */
597 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
598 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
599 /* OCTET STRING wrapper */
600 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
601 /* SEQUENCE wrapper */
602 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
603 /* SET wrapper */
604 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
605 /* BIT STRING wrapper */
606 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
607 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
608 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
609 };
610
611 if (len == -1)
612 len = strlen(tagstr);
613
614 tntmp = tnst;
615 for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++)
616 {
617 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
618 return tntmp->tag;
619 }
620
621 return -1;
622 }
623
asn1_str2type(const char * str,int format,int utype)624 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
625 {
626 ASN1_TYPE *atmp = NULL;
627
628 CONF_VALUE vtmp;
629
630 unsigned char *rdata;
631 long rdlen;
632
633 int no_unused = 1;
634
635 if (!(atmp = ASN1_TYPE_new()))
636 {
637 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
638 return NULL;
639 }
640
641 if (!str)
642 str = "";
643
644 switch(utype)
645 {
646
647 case V_ASN1_NULL:
648 if (str && *str)
649 {
650 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
651 goto bad_form;
652 }
653 break;
654
655 case V_ASN1_BOOLEAN:
656 if (format != ASN1_GEN_FORMAT_ASCII)
657 {
658 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
659 goto bad_form;
660 }
661 vtmp.name = NULL;
662 vtmp.section = NULL;
663 vtmp.value = (char *)str;
664 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean))
665 {
666 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
667 goto bad_str;
668 }
669 break;
670
671 case V_ASN1_INTEGER:
672 case V_ASN1_ENUMERATED:
673 if (format != ASN1_GEN_FORMAT_ASCII)
674 {
675 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
676 goto bad_form;
677 }
678 if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str)))
679 {
680 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
681 goto bad_str;
682 }
683 break;
684
685 case V_ASN1_OBJECT:
686 if (format != ASN1_GEN_FORMAT_ASCII)
687 {
688 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
689 goto bad_form;
690 }
691 if (!(atmp->value.object = OBJ_txt2obj(str, 0)))
692 {
693 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
694 goto bad_str;
695 }
696 break;
697
698 case V_ASN1_UTCTIME:
699 case V_ASN1_GENERALIZEDTIME:
700 if (format != ASN1_GEN_FORMAT_ASCII)
701 {
702 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
703 goto bad_form;
704 }
705 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
706 {
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 {
712 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
713 goto bad_str;
714 }
715 atmp->value.asn1_string->type = utype;
716 if (!ASN1_TIME_check(atmp->value.asn1_string))
717 {
718 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
719 goto bad_str;
720 }
721
722 break;
723
724 case V_ASN1_BMPSTRING:
725 case V_ASN1_PRINTABLESTRING:
726 case V_ASN1_IA5STRING:
727 case V_ASN1_T61STRING:
728 case V_ASN1_UTF8STRING:
729 case V_ASN1_VISIBLESTRING:
730 case V_ASN1_UNIVERSALSTRING:
731 case V_ASN1_GENERALSTRING:
732
733 if (format == ASN1_GEN_FORMAT_ASCII)
734 format = MBSTRING_ASC;
735 else if (format == ASN1_GEN_FORMAT_UTF8)
736 format = MBSTRING_UTF8;
737 else
738 {
739 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
740 goto bad_form;
741 }
742
743
744 if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
745 -1, format, ASN1_tag2bit(utype)) <= 0)
746 {
747 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
748 goto bad_str;
749 }
750
751
752 break;
753
754 case V_ASN1_BIT_STRING:
755
756 case V_ASN1_OCTET_STRING:
757
758 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
759 {
760 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
761 goto bad_form;
762 }
763
764 if (format == ASN1_GEN_FORMAT_HEX)
765 {
766
767 if (!(rdata = string_to_hex((char *)str, &rdlen)))
768 {
769 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
770 goto bad_str;
771 }
772
773 atmp->value.asn1_string->data = rdata;
774 atmp->value.asn1_string->length = rdlen;
775 atmp->value.asn1_string->type = utype;
776
777 }
778 else if (format == ASN1_GEN_FORMAT_ASCII)
779 ASN1_STRING_set(atmp->value.asn1_string, str, -1);
780 else if ((format == ASN1_GEN_FORMAT_BITLIST) && (utype == V_ASN1_BIT_STRING))
781 {
782 if (!CONF_parse_list(str, ',', 1, bitstr_cb, atmp->value.bit_string))
783 {
784 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
785 goto bad_str;
786 }
787 no_unused = 0;
788
789 }
790 else
791 {
792 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
793 goto bad_form;
794 }
795
796 if ((utype == V_ASN1_BIT_STRING) && no_unused)
797 {
798 atmp->value.asn1_string->flags
799 &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
800 atmp->value.asn1_string->flags
801 |= ASN1_STRING_FLAG_BITS_LEFT;
802 }
803
804
805 break;
806
807 default:
808 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
809 goto bad_str;
810 break;
811 }
812
813
814 atmp->type = utype;
815 return atmp;
816
817
818 bad_str:
819 ERR_add_error_data(2, "string=", str);
820 bad_form:
821
822 ASN1_TYPE_free(atmp);
823 return NULL;
824
825 }
826
bitstr_cb(const char * elem,int len,void * bitstr)827 static int bitstr_cb(const char *elem, int len, void *bitstr)
828 {
829 long bitnum;
830 char *eptr;
831 if (!elem)
832 return 0;
833 bitnum = strtoul(elem, &eptr, 10);
834 if (eptr && *eptr && (eptr != elem + len))
835 return 0;
836 if (bitnum < 0)
837 {
838 ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
839 return 0;
840 }
841 if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1))
842 {
843 ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
844 return 0;
845 }
846 return 1;
847 }
848
849