crypto/openssl/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_UNKOWN_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             break;
 447
 448         }
 449     } else
 450         *pclass = V_ASN1_CONTEXT_SPECIFIC;
 451
 452     return 1;
 453
 454 }
 455
 456 /* Handle multiple types: SET and SEQUENCE */
 457
 458 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf,
 459                              int depth, int *perr)
 460 {
 461     ASN1_TYPE *ret = NULL;
 462     STACK_OF(ASN1_TYPE) *sk = NULL;
 463     STACK_OF(CONF_VALUE) *sect = NULL;
 464     unsigned char *der = NULL;
 465     int derlen;
 466     int i;
 467     sk = sk_ASN1_TYPE_new_null();
 468     if (!sk)
 469         goto bad;
 470     if (section) {
 471         if (!cnf)
 472             goto bad;
 473         sect = X509V3_get_section(cnf, (char *)section);
 474         if (!sect)
 475             goto bad;
 476         for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
 477             ASN1_TYPE *typ =
 478                 generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf,
 479                             depth + 1, perr);
 480             if (!typ)
 481                 goto bad;
 482             if (!sk_ASN1_TYPE_push(sk, typ))
 483                 goto bad;
 484         }
 485     }
 486
 487     /*
 488      * Now we has a STACK of the components, convert to the correct form
 489      */
 490
 491     if (utype == V_ASN1_SET)
 492         derlen = i2d_ASN1_SET_ANY(sk, &der);
 493     else
 494         derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);
 495
 496     if (derlen < 0)
 497         goto bad;
 498
 499     if (!(ret = ASN1_TYPE_new()))
 500         goto bad;
 501
 502     if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
 503         goto bad;
 504
 505     ret->type = utype;
 506
 507     ret->value.asn1_string->data = der;
 508     ret->value.asn1_string->length = derlen;
 509
 510     der = NULL;
 511
 512  bad:
 513
 514     if (der)
 515         OPENSSL_free(der);
 516
 517     if (sk)
 518         sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
 519     if (sect)
 520         X509V3_section_free(cnf, sect);
 521
 522     return ret;
 523 }
 524
 525 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
 526                       int exp_constructed, int exp_pad, int imp_ok)
 527 {
 528     tag_exp_type *exp_tmp;
 529     /* Can only have IMPLICIT if permitted */
 530     if ((arg->imp_tag != -1) && !imp_ok) {
 531         ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);
 532         return 0;
 533     }
 534
 535     if (arg->exp_count == ASN1_FLAG_EXP_MAX) {
 536         ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED);
 537         return 0;
 538     }
 539
 540     exp_tmp = &arg->exp_list[arg->exp_count++];
 541
 542     /*
 543      * If IMPLICIT set tag to implicit value then reset implicit tag since it
 544      * has been used.
 545      */
 546     if (arg->imp_tag != -1) {
 547         exp_tmp->exp_tag = arg->imp_tag;
 548         exp_tmp->exp_class = arg->imp_class;
 549         arg->imp_tag = -1;
 550         arg->imp_class = -1;
 551     } else {
 552         exp_tmp->exp_tag = exp_tag;
 553         exp_tmp->exp_class = exp_class;
 554     }
 555     exp_tmp->exp_constructed = exp_constructed;
 556     exp_tmp->exp_pad = exp_pad;
 557
 558     return 1;
 559 }
 560
 561 static int asn1_str2tag(const char *tagstr, int len)
 562 {
 563     unsigned int i;
 564     static const struct tag_name_st *tntmp, tnst[] = {
 565         ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
 566         ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
 567         ASN1_GEN_STR("NULL", V_ASN1_NULL),
 568         ASN1_GEN_STR("INT", V_ASN1_INTEGER),
 569         ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
 570         ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
 571         ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
 572         ASN1_GEN_STR("OID", V_ASN1_OBJECT),
 573         ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
 574         ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
 575         ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
 576         ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
 577         ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
 578         ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
 579         ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
 580         ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
 581         ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
 582         ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
 583         ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
 584         ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
 585         ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
 586         ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
 587         ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
 588         ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
 589         ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
 590         ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
 591         ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
 592         ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
 593         ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
 594         ASN1_GEN_STR("T61", V_ASN1_T61STRING),
 595         ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
 596         ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
 597         ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
 598         ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
 599         ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
 600         ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),
 601
 602         /* Special cases */
 603         ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
 604         ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
 605         ASN1_GEN_STR("SET", V_ASN1_SET),
 606         /* type modifiers */
 607         /* Explicit tag */
 608         ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
 609         ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
 610         /* Implicit tag */
 611         ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
 612         ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
 613         /* OCTET STRING wrapper */
 614         ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
 615         /* SEQUENCE wrapper */
 616         ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
 617         /* SET wrapper */
 618         ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
 619         /* BIT STRING wrapper */
 620         ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
 621         ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
 622         ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
 623     };
 624
 625     if (len == -1)
 626         len = strlen(tagstr);
 627
 628     tntmp = tnst;
 629     for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++) {
 630         if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
 631             return tntmp->tag;
 632     }
 633
 634     return -1;
 635 }
 636
 637 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
 638 {
 639     ASN1_TYPE *atmp = NULL;
 640
 641     CONF_VALUE vtmp;
 642
 643     unsigned char *rdata;
 644     long rdlen;
 645
 646     int no_unused = 1;
 647
 648     if (!(atmp = ASN1_TYPE_new())) {
 649         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 650         return NULL;
 651     }
 652
 653     if (!str)
 654         str = "";
 655
 656     switch (utype) {
 657
 658     case V_ASN1_NULL:
 659         if (str && *str) {
 660             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
 661             goto bad_form;
 662         }
 663         break;
 664
 665     case V_ASN1_BOOLEAN:
 666         if (format != ASN1_GEN_FORMAT_ASCII) {
 667             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
 668             goto bad_form;
 669         }
 670         vtmp.name = NULL;
 671         vtmp.section = NULL;
 672         vtmp.value = (char *)str;
 673         if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) {
 674             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
 675             goto bad_str;
 676         }
 677         break;
 678
 679     case V_ASN1_INTEGER:
 680     case V_ASN1_ENUMERATED:
 681         if (format != ASN1_GEN_FORMAT_ASCII) {
 682             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
 683             goto bad_form;
 684         }
 685         if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str))) {
 686             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
 687             goto bad_str;
 688         }
 689         break;
 690
 691     case V_ASN1_OBJECT:
 692         if (format != ASN1_GEN_FORMAT_ASCII) {
 693             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
 694             goto bad_form;
 695         }
 696         if (!(atmp->value.object = OBJ_txt2obj(str, 0))) {
 697             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
 698             goto bad_str;
 699         }
 700         break;
 701
 702     case V_ASN1_UTCTIME:
 703     case V_ASN1_GENERALIZEDTIME:
 704         if (format != ASN1_GEN_FORMAT_ASCII) {
 705             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
 706             goto bad_form;
 707         }
 708         if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
 709             ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 710             goto bad_str;
 711         }
 712         if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) {
 713             ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 714             goto bad_str;
 715         }
 716         atmp->value.asn1_string->type = utype;
 717         if (!ASN1_TIME_check(atmp->value.asn1_string)) {
 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     case V_ASN1_NUMERICSTRING:
 733
 734         if (format == ASN1_GEN_FORMAT_ASCII)
 735             format = MBSTRING_ASC;
 736         else if (format == ASN1_GEN_FORMAT_UTF8)
 737             format = MBSTRING_UTF8;
 738         else {
 739             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
 740             goto bad_form;
 741         }
 742
 743         if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
 744                                -1, format, ASN1_tag2bit(utype)) <= 0) {
 745             ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 746             goto bad_str;
 747         }
 748
 749         break;
 750
 751     case V_ASN1_BIT_STRING:
 752
 753     case V_ASN1_OCTET_STRING:
 754
 755         if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
 756             ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 757             goto bad_form;
 758         }
 759
 760         if (format == ASN1_GEN_FORMAT_HEX) {
 761
 762             if (!(rdata = string_to_hex((char *)str, &rdlen))) {
 763                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
 764                 goto bad_str;
 765             }
 766
 767             atmp->value.asn1_string->data = rdata;
 768             atmp->value.asn1_string->length = rdlen;
 769             atmp->value.asn1_string->type = utype;
 770
 771         } else if (format == ASN1_GEN_FORMAT_ASCII)
 772             ASN1_STRING_set(atmp->value.asn1_string, str, -1);
 773         else if ((format == ASN1_GEN_FORMAT_BITLIST)
 774                  && (utype == V_ASN1_BIT_STRING)) {
 775             if (!CONF_parse_list
 776                 (str, ',', 1, bitstr_cb, atmp->value.bit_string)) {
 777                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
 778                 goto bad_str;
 779             }
 780             no_unused = 0;
 781
 782         } else {
 783             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
 784             goto bad_form;
 785         }
 786
 787         if ((utype == V_ASN1_BIT_STRING) && no_unused) {
 788             atmp->value.asn1_string->flags
 789                 &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
 790             atmp->value.asn1_string->flags |= ASN1_STRING_FLAG_BITS_LEFT;
 791         }
 792
 793         break;
 794
 795     default:
 796         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
 797         goto bad_str;
 798         break;
 799     }
 800
 801     atmp->type = utype;
 802     return atmp;
 803
 804  bad_str:
 805     ERR_add_error_data(2, "string=", str);
 806  bad_form:
 807
 808     ASN1_TYPE_free(atmp);
 809     return NULL;
 810
 811 }
 812
 813 static int bitstr_cb(const char *elem, int len, void *bitstr)
 814 {
 815     long bitnum;
 816     char *eptr;
 817     if (!elem)
 818         return 0;
 819     bitnum = strtoul(elem, &eptr, 10);
 820     if (eptr && *eptr && (eptr != elem + len))
 821         return 0;
 822     if (bitnum < 0) {
 823         ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
 824         return 0;
 825     }
 826     if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) {
 827         ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
 828         return 0;
 829     }
 830     return 1;
 831 }