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
  78 /* Input formats */
  79
  80 /* ASCII: default */
  81 #define ASN1_GEN_FORMAT_ASCII   1
  82 /* UTF8 */
  83 #define ASN1_GEN_FORMAT_UTF8    2
  84 /* Hex */
  85 #define ASN1_GEN_FORMAT_HEX     3
  86 /* List of bits */
  87 #define ASN1_GEN_FORMAT_BITLIST 4
  88
  89 struct tag_name_st {
  90     const char *strnam;
  91     int len;
  92     int tag;
  93 };
  94
  95 typedef struct {
  96     int exp_tag;
  97     int exp_class;
  98     int exp_constructed;
  99     int exp_pad;
 100     long exp_len;
 101 } tag_exp_type;
 102
 103 typedef struct {
 104     int imp_tag;
 105     int imp_class;
 106     int utype;
 107     int format;
 108     const char *str;
 109     tag_exp_type exp_list[ASN1_FLAG_EXP_MAX];
 110     int exp_count;
 111 } tag_exp_arg;
 112
 113 static int bitstr_cb(const char *elem, int len, void *bitstr);
 114 static int asn1_cb(const char *elem, int len, void *bitstr);
 115 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
 116                       int exp_constructed, int exp_pad, int imp_ok);
 117 static int parse_tagging(const char *vstart, int vlen, int *ptag,
 118                          int *pclass);
 119 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf);
 120 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype);
 121 static int asn1_str2tag(const char *tagstr, int len);
 122
 123 ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf)
 124 {
 125     X509V3_CTX cnf;
 126
 127     if (!nconf)
 128         return ASN1_generate_v3(str, NULL);
 129
 130     X509V3_set_nconf(&cnf, nconf);
 131     return ASN1_generate_v3(str, &cnf);
 132 }
 133
 134 ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf)
 135 {
 136     ASN1_TYPE *ret;
 137     tag_exp_arg asn1_tags;
 138     tag_exp_type *etmp;
 139
 140     int i, len;
 141
 142     unsigned char *orig_der = NULL, *new_der = NULL;
 143     const unsigned char *cpy_start;
 144     unsigned char *p;
 145     const unsigned char *cp;
 146     int cpy_len;
 147     long hdr_len;
 148     int hdr_constructed = 0, hdr_tag, hdr_class;
 149     int r;
 150
 151     asn1_tags.imp_tag = -1;
 152     asn1_tags.imp_class = -1;
 153     asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
 154     asn1_tags.exp_count = 0;
 155     if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0)
 156         return NULL;
 157
 158     if ((asn1_tags.utype == V_ASN1_SEQUENCE)
 159         || (asn1_tags.utype == V_ASN1_SET)) {
 160         if (!cnf) {
 161             ASN1err(ASN1_F_ASN1_GENERATE_V3,
 162                     ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG);
 163             return NULL;
 164         }
 165         ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf);
 166     } else
 167         ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype);
 168
 169     if (!ret)
 170         return NULL;
 171
 172     /* If no tagging return base type */
 173     if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0))
 174         return ret;
 175
 176     /* Generate the encoding */
 177     cpy_len = i2d_ASN1_TYPE(ret, &orig_der);
 178     ASN1_TYPE_free(ret);
 179     ret = NULL;
 180     /* Set point to start copying for modified encoding */
 181     cpy_start = orig_der;
 182
 183     /* Do we need IMPLICIT tagging? */
 184     if (asn1_tags.imp_tag != -1) {
 185         /* If IMPLICIT we will replace the underlying tag */
 186         /* Skip existing tag+len */
 187         r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class,
 188                             cpy_len);
 189         if (r & 0x80)
 190             goto err;
 191         /* Update copy length */
 192         cpy_len -= cpy_start - orig_der;
 193         /*
 194          * For IMPLICIT tagging the length should match the original length
 195          * and constructed flag should be consistent.
 196          */
 197         if (r & 0x1) {
 198             /* Indefinite length constructed */
 199             hdr_constructed = 2;
 200             hdr_len = 0;
 201         } else
 202             /* Just retain constructed flag */
 203             hdr_constructed = r & V_ASN1_CONSTRUCTED;
 204         /*
 205          * Work out new length with IMPLICIT tag: ignore constructed because
 206          * it will mess up if indefinite length
 207          */
 208         len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag);
 209     } else
 210         len = cpy_len;
 211
 212     /* Work out length in any EXPLICIT, starting from end */
 213
 214     for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1;
 215          i < asn1_tags.exp_count; i++, etmp--) {
 216         /* Content length: number of content octets + any padding */
 217         len += etmp->exp_pad;
 218         etmp->exp_len = len;
 219         /* Total object length: length including new header */
 220         len = ASN1_object_size(0, len, etmp->exp_tag);
 221     }
 222
 223     /* Allocate buffer for new encoding */
 224
 225     new_der = OPENSSL_malloc(len);
 226     if (!new_der)
 227         goto err;
 228
 229     /* Generate tagged encoding */
 230
 231     p = new_der;
 232
 233     /* Output explicit tags first */
 234
 235     for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count;
 236          i++, etmp++) {
 237         ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,
 238                         etmp->exp_tag, etmp->exp_class);
 239         if (etmp->exp_pad)
 240             *p++ = 0;
 241     }
 242
 243     /* If IMPLICIT, output tag */
 244
 245     if (asn1_tags.imp_tag != -1)
 246         ASN1_put_object(&p, hdr_constructed, hdr_len,
 247                         asn1_tags.imp_tag, asn1_tags.imp_class);
 248
 249     /* Copy across original encoding */
 250     memcpy(p, cpy_start, cpy_len);
 251
 252     cp = new_der;
 253
 254     /* Obtain new ASN1_TYPE structure */
 255     ret = d2i_ASN1_TYPE(NULL, &cp, len);
 256
 257  err:
 258     if (orig_der)
 259         OPENSSL_free(orig_der);
 260     if (new_der)
 261         OPENSSL_free(new_der);
 262
 263     return ret;
 264
 265 }
 266
 267 static int asn1_cb(const char *elem, int len, void *bitstr)
 268 {
 269     tag_exp_arg *arg = bitstr;
 270     int i;
 271     int utype;
 272     int vlen = 0;
 273     const char *p, *vstart = NULL;
 274
 275     int tmp_tag, tmp_class;
 276
 277     for (i = 0, p = elem; i < len; p++, i++) {
 278         /* Look for the ':' in name value pairs */
 279         if (*p == ':') {
 280             vstart = p + 1;
 281             vlen = len - (vstart - elem);
 282             len = p - elem;
 283             break;
 284         }
 285     }
 286
 287     utype = asn1_str2tag(elem, len);
 288
 289     if (utype == -1) {
 290         ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG);
 291         ERR_add_error_data(2, "tag=", elem);
 292         return -1;
 293     }
 294
 295     /* If this is not a modifier mark end of string and exit */
 296     if (!(utype & ASN1_GEN_FLAG)) {
 297         arg->utype = utype;
 298         arg->str = vstart;
 299         /* If no value and not end of string, error */
 300         if (!vstart && elem[len]) {
 301             ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE);
 302             return -1;
 303         }
 304         return 0;
 305     }
 306
 307     switch (utype) {
 308
 309     case ASN1_GEN_FLAG_IMP:
 310         /* Check for illegal multiple IMPLICIT tagging */
 311         if (arg->imp_tag != -1) {
 312             ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING);
 313             return -1;
 314         }
 315         if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
 316             return -1;
 317         break;
 318
 319     case ASN1_GEN_FLAG_EXP:
 320
 321         if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
 322             return -1;
 323         if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
 324             return -1;
 325         break;
 326
 327     case ASN1_GEN_FLAG_SEQWRAP:
 328         if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
 329             return -1;
 330         break;
 331
 332     case ASN1_GEN_FLAG_SETWRAP:
 333         if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
 334             return -1;
 335         break;
 336
 337     case ASN1_GEN_FLAG_BITWRAP:
 338         if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
 339             return -1;
 340         break;
 341
 342     case ASN1_GEN_FLAG_OCTWRAP:
 343         if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
 344             return -1;
 345         break;
 346
 347     case ASN1_GEN_FLAG_FORMAT:
 348         if (!strncmp(vstart, "ASCII", 5))
 349             arg->format = ASN1_GEN_FORMAT_ASCII;
 350         else if (!strncmp(vstart, "UTF8", 4))
 351             arg->format = ASN1_GEN_FORMAT_UTF8;
 352         else if (!strncmp(vstart, "HEX", 3))
 353             arg->format = ASN1_GEN_FORMAT_HEX;
 354         else if (!strncmp(vstart, "BITLIST", 3))
 355             arg->format = ASN1_GEN_FORMAT_BITLIST;
 356         else {
 357             ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT);
 358             return -1;
 359         }
 360         break;
 361
 362     }
 363
 364     return 1;
 365
 366 }
 367
 368 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
 369 {
 370     char erch[2];
 371     long tag_num;
 372     char *eptr;
 373     if (!vstart)
 374         return 0;
 375     tag_num = strtoul(vstart, &eptr, 10);
 376     /* Check we haven't gone past max length: should be impossible */
 377     if (eptr && *eptr && (eptr > vstart + vlen))
 378         return 0;
 379     if (tag_num < 0) {
 380         ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER);
 381         return 0;
 382     }
 383     *ptag = tag_num;
 384     /* If we have non numeric characters, parse them */
 385     if (eptr)
 386         vlen -= eptr - vstart;
 387     else
 388         vlen = 0;
 389     if (vlen) {
 390         switch (*eptr) {
 391
 392         case 'U':
 393             *pclass = V_ASN1_UNIVERSAL;
 394             break;
 395
 396         case 'A':
 397             *pclass = V_ASN1_APPLICATION;
 398             break;
 399
 400         case 'P':
 401             *pclass = V_ASN1_PRIVATE;
 402             break;
 403
 404         case 'C':
 405             *pclass = V_ASN1_CONTEXT_SPECIFIC;
 406             break;
 407
 408         default:
 409             erch[0] = *eptr;
 410             erch[1] = 0;
 411             ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER);
 412             ERR_add_error_data(2, "Char=", erch);
 413             return 0;
 414             break;
 415
 416         }
 417     } else
 418         *pclass = V_ASN1_CONTEXT_SPECIFIC;
 419
 420     return 1;
 421
 422 }
 423
 424 /* Handle multiple types: SET and SEQUENCE */
 425
 426 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
 427 {
 428     ASN1_TYPE *ret = NULL, *typ = NULL;
 429     STACK_OF(ASN1_TYPE) *sk = NULL;
 430     STACK_OF(CONF_VALUE) *sect = NULL;
 431     unsigned char *der = NULL, *p;
 432     int derlen;
 433     int i, is_set;
 434     sk = sk_ASN1_TYPE_new_null();
 435     if (!sk)
 436         goto bad;
 437     if (section) {
 438         if (!cnf)
 439             goto bad;
 440         sect = X509V3_get_section(cnf, (char *)section);
 441         if (!sect)
 442             goto bad;
 443         for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
 444             typ = ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf);
 445             if (!typ)
 446                 goto bad;
 447             if (!sk_ASN1_TYPE_push(sk, typ))
 448                 goto bad;
 449             typ = NULL;
 450         }
 451     }
 452
 453     /*
 454      * Now we has a STACK of the components, convert to the correct form
 455      */
 456
 457     if (utype == V_ASN1_SET)
 458         is_set = 1;
 459     else
 460         is_set = 0;
 461
 462     derlen = i2d_ASN1_SET_OF_ASN1_TYPE(sk, NULL, i2d_ASN1_TYPE, utype,
 463                                        V_ASN1_UNIVERSAL, is_set);
 464     der = OPENSSL_malloc(derlen);
 465     if (!der)
 466         goto bad;
 467     p = der;
 468     i2d_ASN1_SET_OF_ASN1_TYPE(sk, &p, i2d_ASN1_TYPE, utype,
 469                               V_ASN1_UNIVERSAL, is_set);
 470
 471     if (!(ret = ASN1_TYPE_new()))
 472         goto bad;
 473
 474     if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
 475         goto bad;
 476
 477     ret->type = utype;
 478
 479     ret->value.asn1_string->data = der;
 480     ret->value.asn1_string->length = derlen;
 481
 482     der = NULL;
 483
 484  bad:
 485
 486     if (der)
 487         OPENSSL_free(der);
 488
 489     if (sk)
 490         sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
 491     if (typ)
 492         ASN1_TYPE_free(typ);
 493     if (sect)
 494         X509V3_section_free(cnf, sect);
 495
 496     return ret;
 497 }
 498
 499 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
 500                       int exp_constructed, int exp_pad, int imp_ok)
 501 {
 502     tag_exp_type *exp_tmp;
 503     /* Can only have IMPLICIT if permitted */
 504     if ((arg->imp_tag != -1) && !imp_ok) {
 505         ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);
 506         return 0;
 507     }
 508
 509     if (arg->exp_count == ASN1_FLAG_EXP_MAX) {
 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     /*
 517      * If IMPLICIT set tag to implicit value then reset implicit tag since it
 518      * has been used.
 519      */
 520     if (arg->imp_tag != -1) {
 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     } else {
 526         exp_tmp->exp_tag = exp_tag;
 527         exp_tmp->exp_class = exp_class;
 528     }
 529     exp_tmp->exp_constructed = exp_constructed;
 530     exp_tmp->exp_pad = exp_pad;
 531
 532     return 1;
 533 }
 534
 535 static int asn1_str2tag(const char *tagstr, int len)
 536 {
 537     unsigned int i;
 538     static struct tag_name_st *tntmp, tnst[] = {
 539         ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
 540         ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
 541         ASN1_GEN_STR("NULL", V_ASN1_NULL),
 542         ASN1_GEN_STR("INT", V_ASN1_INTEGER),
 543         ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
 544         ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
 545         ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
 546         ASN1_GEN_STR("OID", V_ASN1_OBJECT),
 547         ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
 548         ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
 549         ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
 550         ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
 551         ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
 552         ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
 553         ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
 554         ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
 555         ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
 556         ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
 557         ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
 558         ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
 559         ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
 560         ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
 561         ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
 562         ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
 563         ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
 564         ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
 565         ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
 566         ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
 567         ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
 568         ASN1_GEN_STR("T61", V_ASN1_T61STRING),
 569         ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
 570         ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
 571         ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
 572         ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
 573
 574         /* Special cases */
 575         ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
 576         ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
 577         ASN1_GEN_STR("SET", V_ASN1_SET),
 578         /* type modifiers */
 579         /* Explicit tag */
 580         ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
 581         ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
 582         /* Implicit tag */
 583         ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
 584         ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
 585         /* OCTET STRING wrapper */
 586         ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
 587         /* SEQUENCE wrapper */
 588         ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
 589         /* SET wrapper */
 590         ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
 591         /* BIT STRING wrapper */
 592         ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
 593         ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
 594         ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
 595     };
 596
 597     if (len == -1)
 598         len = strlen(tagstr);
 599
 600     tntmp = tnst;
 601     for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++) {
 602         if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
 603             return tntmp->tag;
 604     }
 605
 606     return -1;
 607 }
 608
 609 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
 610 {
 611     ASN1_TYPE *atmp = NULL;
 612
 613     CONF_VALUE vtmp;
 614
 615     unsigned char *rdata;
 616     long rdlen;
 617
 618     int no_unused = 1;
 619
 620     if (!(atmp = ASN1_TYPE_new())) {
 621         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 622         return NULL;
 623     }
 624
 625     if (!str)
 626         str = "";
 627
 628     switch (utype) {
 629
 630     case V_ASN1_NULL:
 631         if (str && *str) {
 632             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
 633             goto bad_form;
 634         }
 635         break;
 636
 637     case V_ASN1_BOOLEAN:
 638         if (format != ASN1_GEN_FORMAT_ASCII) {
 639             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
 640             goto bad_form;
 641         }
 642         vtmp.name = NULL;
 643         vtmp.section = NULL;
 644         vtmp.value = (char *)str;
 645         if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) {
 646             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
 647             goto bad_str;
 648         }
 649         break;
 650
 651     case V_ASN1_INTEGER:
 652     case V_ASN1_ENUMERATED:
 653         if (format != ASN1_GEN_FORMAT_ASCII) {
 654             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
 655             goto bad_form;
 656         }
 657         if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str))) {
 658             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
 659             goto bad_str;
 660         }
 661         break;
 662
 663     case V_ASN1_OBJECT:
 664         if (format != ASN1_GEN_FORMAT_ASCII) {
 665             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
 666             goto bad_form;
 667         }
 668         if (!(atmp->value.object = OBJ_txt2obj(str, 0))) {
 669             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
 670             goto bad_str;
 671         }
 672         break;
 673
 674     case V_ASN1_UTCTIME:
 675     case V_ASN1_GENERALIZEDTIME:
 676         if (format != ASN1_GEN_FORMAT_ASCII) {
 677             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
 678             goto bad_form;
 679         }
 680         if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
 681             ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 682             goto bad_str;
 683         }
 684         if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) {
 685             ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 686             goto bad_str;
 687         }
 688         atmp->value.asn1_string->type = utype;
 689         if (!ASN1_TIME_check(atmp->value.asn1_string)) {
 690             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
 691             goto bad_str;
 692         }
 693
 694         break;
 695
 696     case V_ASN1_BMPSTRING:
 697     case V_ASN1_PRINTABLESTRING:
 698     case V_ASN1_IA5STRING:
 699     case V_ASN1_T61STRING:
 700     case V_ASN1_UTF8STRING:
 701     case V_ASN1_VISIBLESTRING:
 702     case V_ASN1_UNIVERSALSTRING:
 703     case V_ASN1_GENERALSTRING:
 704
 705         if (format == ASN1_GEN_FORMAT_ASCII)
 706             format = MBSTRING_ASC;
 707         else if (format == ASN1_GEN_FORMAT_UTF8)
 708             format = MBSTRING_UTF8;
 709         else {
 710             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
 711             goto bad_form;
 712         }
 713
 714         if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
 715                                -1, format, ASN1_tag2bit(utype)) <= 0) {
 716             ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 717             goto bad_str;
 718         }
 719
 720         break;
 721
 722     case V_ASN1_BIT_STRING:
 723
 724     case V_ASN1_OCTET_STRING:
 725
 726         if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
 727             ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 728             goto bad_form;
 729         }
 730
 731         if (format == ASN1_GEN_FORMAT_HEX) {
 732
 733             if (!(rdata = string_to_hex((char *)str, &rdlen))) {
 734                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
 735                 goto bad_str;
 736             }
 737
 738             atmp->value.asn1_string->data = rdata;
 739             atmp->value.asn1_string->length = rdlen;
 740             atmp->value.asn1_string->type = utype;
 741
 742         } else if (format == ASN1_GEN_FORMAT_ASCII)
 743             ASN1_STRING_set(atmp->value.asn1_string, str, -1);
 744         else if ((format == ASN1_GEN_FORMAT_BITLIST)
 745                  && (utype == V_ASN1_BIT_STRING)) {
 746             if (!CONF_parse_list
 747                 (str, ',', 1, bitstr_cb, atmp->value.bit_string)) {
 748                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
 749                 goto bad_str;
 750             }
 751             no_unused = 0;
 752
 753         } else {
 754             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
 755             goto bad_form;
 756         }
 757
 758         if ((utype == V_ASN1_BIT_STRING) && no_unused) {
 759             atmp->value.asn1_string->flags
 760                 &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
 761             atmp->value.asn1_string->flags |= ASN1_STRING_FLAG_BITS_LEFT;
 762         }
 763
 764         break;
 765
 766     default:
 767         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
 768         goto bad_str;
 769         break;
 770     }
 771
 772     atmp->type = utype;
 773     return atmp;
 774
 775  bad_str:
 776     ERR_add_error_data(2, "string=", str);
 777  bad_form:
 778
 779     ASN1_TYPE_free(atmp);
 780     return NULL;
 781
 782 }
 783
 784 static int bitstr_cb(const char *elem, int len, void *bitstr)
 785 {
 786     long bitnum;
 787     char *eptr;
 788     if (!elem)
 789         return 0;
 790     bitnum = strtoul(elem, &eptr, 10);
 791     if (eptr && *eptr && (eptr != elem + len))
 792         return 0;
 793     if (bitnum < 0) {
 794         ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
 795         return 0;
 796     }
 797     if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) {
 798         ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
 799         return 0;
 800     }
 801     return 1;
 802 }