size_tification.
[openssl.git] / crypto / asn1 / asn1_gen.c
1 /* asn1_gen.c */
2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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
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
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         size_t 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
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
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
440 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
441         {
442         ASN1_TYPE *ret = NULL;
443         STACK_OF(ASN1_TYPE) *sk = NULL;
444         STACK_OF(CONF_VALUE) *sect = NULL;
445         unsigned char *der = NULL;
446         int derlen;
447         int i;
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                         ASN1_TYPE *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                         }
463                 }
464
465         /* Now we has a STACK of the components, convert to the correct form */
466
467         if (utype == V_ASN1_SET)
468                 derlen = i2d_ASN1_SET_ANY(sk, &der);
469         else
470                 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);
471
472         if (!(ret = ASN1_TYPE_new()))
473                 goto bad;
474
475         if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
476                 goto bad;
477
478         ret->type = utype;
479
480         ret->value.asn1_string->data = der;
481         ret->value.asn1_string->length = derlen;
482
483         der = NULL;
484
485         bad:
486
487         if (der)
488                 OPENSSL_free(der);
489
490         if (sk)
491                 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
492         if (sect)
493                 X509V3_section_free(cnf, sect);
494
495         return ret;
496         }
497
498 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok)
499         {
500         tag_exp_type *exp_tmp;
501         /* Can only have IMPLICIT if permitted */
502         if ((arg->imp_tag != -1) && !imp_ok)
503                 {
504                 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);
505                 return 0;
506                 }
507
508         if (arg->exp_count == ASN1_FLAG_EXP_MAX)
509                 {
510                 ASN1err(ASN1_F_APPEND_EXP, 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                 {
521                 exp_tmp->exp_tag = arg->imp_tag;
522                 exp_tmp->exp_class = arg->imp_class;
523                 arg->imp_tag = -1;
524                 arg->imp_class = -1;
525                 }
526         else
527                 {
528                 exp_tmp->exp_tag = exp_tag;
529                 exp_tmp->exp_class = exp_class;
530                 }
531         exp_tmp->exp_constructed = exp_constructed;
532         exp_tmp->exp_pad = exp_pad;
533
534         return 1;
535         }
536
537
538 static int asn1_str2tag(const char *tagstr, int len)
539         {
540         unsigned int i;
541         static const struct tag_name_st *tntmp, tnst [] = {
542                 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
543                 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
544                 ASN1_GEN_STR("NULL", V_ASN1_NULL),
545                 ASN1_GEN_STR("INT", V_ASN1_INTEGER),
546                 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
547                 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
548                 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
549                 ASN1_GEN_STR("OID", V_ASN1_OBJECT),
550                 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
551                 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
552                 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
553                 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
554                 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
555                 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
556                 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
557                 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
558                 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
559                 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
560                 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
561                 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
562                 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
563                 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
564                 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
565                 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
566                 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
567                 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
568                 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
569                 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
570                 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
571                 ASN1_GEN_STR("T61", V_ASN1_T61STRING),
572                 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
573                 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
574                 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
575                 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
576                 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
577                 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),
578
579                 /* Special cases */
580                 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
581                 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
582                 ASN1_GEN_STR("SET", V_ASN1_SET),
583                 /* type modifiers */
584                 /* Explicit tag */
585                 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
586                 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
587                 /* Implicit tag */
588                 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
589                 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
590                 /* OCTET STRING wrapper */
591                 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
592                 /* SEQUENCE wrapper */
593                 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
594                 /* SET wrapper */
595                 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
596                 /* BIT STRING wrapper */
597                 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
598                 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
599                 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
600         };
601
602         if (len == -1)
603                 len = strlen(tagstr);
604         
605         tntmp = tnst;   
606         for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++)
607                 {
608                 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
609                         return tntmp->tag;
610                 }
611         
612         return -1;
613         }
614
615 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
616         {
617         ASN1_TYPE *atmp = NULL;
618
619         CONF_VALUE vtmp;
620
621         unsigned char *rdata;
622         long rdlen;
623
624         int no_unused = 1;
625
626         if (!(atmp = ASN1_TYPE_new()))
627                 {
628                 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
629                 return NULL;
630                 }
631
632         if (!str)
633                 str = "";
634
635         switch(utype)
636                 {
637
638                 case V_ASN1_NULL:
639                 if (str && *str)
640                         {
641                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
642                         goto bad_form;
643                         }
644                 break;
645                 
646                 case V_ASN1_BOOLEAN:
647                 if (format != ASN1_GEN_FORMAT_ASCII)
648                         {
649                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
650                         goto bad_form;
651                         }
652                 vtmp.name = NULL;
653                 vtmp.section = NULL;
654                 vtmp.value = (char *)str;
655                 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean))
656                         {
657                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
658                         goto bad_str;
659                         }
660                 break;
661
662                 case V_ASN1_INTEGER:
663                 case V_ASN1_ENUMERATED:
664                 if (format != ASN1_GEN_FORMAT_ASCII)
665                         {
666                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
667                         goto bad_form;
668                         }
669                 if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str)))
670                         {
671                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
672                         goto bad_str;
673                         }
674                 break;
675
676                 case V_ASN1_OBJECT:
677                 if (format != ASN1_GEN_FORMAT_ASCII)
678                         {
679                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
680                         goto bad_form;
681                         }
682                 if (!(atmp->value.object = OBJ_txt2obj(str, 0)))
683                         {
684                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
685                         goto bad_str;
686                         }
687                 break;
688
689                 case V_ASN1_UTCTIME:
690                 case V_ASN1_GENERALIZEDTIME:
691                 if (format != ASN1_GEN_FORMAT_ASCII)
692                         {
693                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
694                         goto bad_form;
695                         }
696                 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
697                         {
698                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
699                         goto bad_str;
700                         }
701                 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1))
702                         {
703                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
704                         goto bad_str;
705                         }
706                 atmp->value.asn1_string->type = utype;
707                 if (!ASN1_TIME_check(atmp->value.asn1_string))
708                         {
709                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
710                         goto bad_str;
711                         }
712
713                 break;
714
715                 case V_ASN1_BMPSTRING:
716                 case V_ASN1_PRINTABLESTRING:
717                 case V_ASN1_IA5STRING:
718                 case V_ASN1_T61STRING:
719                 case V_ASN1_UTF8STRING:
720                 case V_ASN1_VISIBLESTRING:
721                 case V_ASN1_UNIVERSALSTRING:
722                 case V_ASN1_GENERALSTRING:
723                 case V_ASN1_NUMERICSTRING:
724
725                 if (format == ASN1_GEN_FORMAT_ASCII)
726                         format = MBSTRING_ASC;
727                 else if (format == ASN1_GEN_FORMAT_UTF8)
728                         format = MBSTRING_UTF8;
729                 else
730                         {
731                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
732                         goto bad_form;
733                         }
734
735
736                 if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
737                                                 -1, format, ASN1_tag2bit(utype)) <= 0)
738                         {
739                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
740                         goto bad_str;
741                         }
742                 
743
744                 break;
745
746                 case V_ASN1_BIT_STRING:
747
748                 case V_ASN1_OCTET_STRING:
749
750                 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
751                         {
752                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
753                         goto bad_form;
754                         }
755
756                 if (format == ASN1_GEN_FORMAT_HEX)
757                         {
758
759                         if (!(rdata = string_to_hex((char *)str, &rdlen)))
760                                 {
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                         }
770                 else if (format == ASN1_GEN_FORMAT_ASCII)
771                         ASN1_STRING_set(atmp->value.asn1_string, str, -1);
772                 else if ((format == ASN1_GEN_FORMAT_BITLIST) && (utype == V_ASN1_BIT_STRING))
773                         {
774                         if (!CONF_parse_list(str, ',', 1, bitstr_cb, atmp->value.bit_string))
775                                 {
776                                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
777                                 goto bad_str;
778                                 }
779                         no_unused = 0;
780                         
781                         }
782                 else 
783                         {
784                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
785                         goto bad_form;
786                         }
787
788                 if ((utype == V_ASN1_BIT_STRING) && no_unused)
789                         {
790                         atmp->value.asn1_string->flags
791                                 &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
792                         atmp->value.asn1_string->flags
793                                 |= ASN1_STRING_FLAG_BITS_LEFT;
794                         }
795
796
797                 break;
798
799                 default:
800                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
801                 goto bad_str;
802                 break;
803                 }
804
805
806         atmp->type = utype;
807         return atmp;
808
809
810         bad_str:
811         ERR_add_error_data(2, "string=", str);
812         bad_form:
813
814         ASN1_TYPE_free(atmp);
815         return NULL;
816
817         }
818
819 static int bitstr_cb(const char *elem, int len, void *bitstr)
820         {
821         long bitnum;
822         char *eptr;
823         if (!elem)
824                 return 0;
825         bitnum = strtoul(elem, &eptr, 10);
826         if (eptr && *eptr && (eptr != elem + len))
827                 return 0;
828         if (bitnum < 0)
829                 {
830                 ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
831                 return 0;
832                 }
833         if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1))
834                 {
835                 ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
836                 return 0;
837                 }
838         return 1;
839         }
840