lib/libcrypto/asn1/asn1_gen.c

   1 /* $OpenBSD: asn1_gen.c,v 1.17 2018/04/25 11:48:21 tb Exp $ */
   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 <string.h>
  60
  61 #include <openssl/asn1.h>
  62 #include <openssl/err.h>
  63 #include <openssl/x509v3.h>
  64
  65 #define ASN1_GEN_FLAG           0x10000
  66 #define ASN1_GEN_FLAG_IMP       (ASN1_GEN_FLAG|1)
  67 #define ASN1_GEN_FLAG_EXP       (ASN1_GEN_FLAG|2)
  68 #define ASN1_GEN_FLAG_TAG       (ASN1_GEN_FLAG|3)
  69 #define ASN1_GEN_FLAG_BITWRAP   (ASN1_GEN_FLAG|4)
  70 #define ASN1_GEN_FLAG_OCTWRAP   (ASN1_GEN_FLAG|5)
  71 #define ASN1_GEN_FLAG_SEQWRAP   (ASN1_GEN_FLAG|6)
  72 #define ASN1_GEN_FLAG_SETWRAP   (ASN1_GEN_FLAG|7)
  73 #define ASN1_GEN_FLAG_FORMAT    (ASN1_GEN_FLAG|8)
  74
  75 #define ASN1_GEN_STR(str,val){str, sizeof(str) - 1, val}
  76
  77 #define ASN1_FLAG_EXP_MAX       20
  78
  79 /* Input formats */
  80
  81 /* ASCII: default */
  82 #define ASN1_GEN_FORMAT_ASCII   1
  83 /* UTF8 */
  84 #define ASN1_GEN_FORMAT_UTF8    2
  85 /* Hex */
  86 #define ASN1_GEN_FORMAT_HEX     3
  87 /* List of bits */
  88 #define ASN1_GEN_FORMAT_BITLIST 4
  89
  90 struct tag_name_st {
  91         const char *strnam;
  92         int len;
  93         int tag;
  94 };
  95
  96 typedef struct {
  97         int exp_tag;
  98         int exp_class;
  99         int exp_constructed;
 100         int exp_pad;
 101         long exp_len;
 102 } tag_exp_type;
 103
 104 typedef struct {
 105         int imp_tag;
 106         int imp_class;
 107         int utype;
 108         int format;
 109         const char *str;
 110         tag_exp_type exp_list[ASN1_FLAG_EXP_MAX];
 111         int exp_count;
 112 } tag_exp_arg;
 113
 114 static int bitstr_cb(const char *elem, int len, void *bitstr);
 115 static int asn1_cb(const char *elem, int len, void *bitstr);
 116 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
 117     int exp_constructed, int exp_pad, int imp_ok);
 118 static int parse_tagging(const char *vstart, int vlen, int *ptag, 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 *
 124 ASN1_generate_nconf(const 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 *
 136 ASN1_generate_v3(const char *str, X509V3_CTX *cnf)
 137 {
 138         ASN1_TYPE *ret;
 139         tag_exp_arg asn1_tags;
 140         tag_exp_type *etmp;
 141
 142         int i, len;
 143
 144         unsigned char *orig_der = NULL, *new_der = NULL;
 145         const unsigned char *cpy_start;
 146         unsigned char *p;
 147         const unsigned char *cp;
 148         int cpy_len;
 149         long hdr_len = 0;
 150         int hdr_constructed = 0, hdr_tag, hdr_class;
 151         int r;
 152
 153         asn1_tags.imp_tag = -1;
 154         asn1_tags.imp_class = -1;
 155         asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
 156         asn1_tags.exp_count = 0;
 157         if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0)
 158                 return NULL;
 159
 160         if ((asn1_tags.utype == V_ASN1_SEQUENCE) ||
 161             (asn1_tags.utype == V_ASN1_SET)) {
 162                 if (!cnf) {
 163                         ASN1error(ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG);
 164                         return NULL;
 165                 }
 166                 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf);
 167         } else
 168                 ret = asn1_str2type(asn1_tags.str, asn1_tags.format,
 169                     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                 /* If IMPLICIT we will replace the underlying tag */
 188                 /* Skip existing tag+len */
 189                 r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag,
 190                     &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                         /* Indefinite length constructed */
 201                         hdr_constructed = 2;
 202                         hdr_len = 0;
 203                 } else
 204                         /* Just retain constructed flag */
 205                         hdr_constructed = r & V_ASN1_CONSTRUCTED;
 206                 /* Work out new length with IMPLICIT tag: ignore constructed
 207                  * because it will mess up if indefinite length
 208                  */
 209                 len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag);
 210         } else
 211                 len = cpy_len;
 212
 213         /* Work out length in any EXPLICIT, starting from end */
 214
 215         for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1;
 216             i < asn1_tags.exp_count; i++, etmp--) {
 217                 /* Content length: number of content octets + any padding */
 218                 len += etmp->exp_pad;
 219                 etmp->exp_len = len;
 220                 /* Total object length: length including new header */
 221                 len = ASN1_object_size(0, len, etmp->exp_tag);
 222         }
 223
 224         /* Allocate buffer for new encoding */
 225
 226         new_der = malloc(len);
 227         if (!new_der)
 228                 goto err;
 229
 230         /* Generate tagged encoding */
 231         p = new_der;
 232
 233         /* Output explicit tags first */
 234         for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count;
 235             i++, etmp++) {
 236                 ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,
 237                     etmp->exp_tag, etmp->exp_class);
 238                 if (etmp->exp_pad)
 239                         *p++ = 0;
 240         }
 241
 242         /* If IMPLICIT, output tag */
 243
 244         if (asn1_tags.imp_tag != -1) {
 245                 if (asn1_tags.imp_class == V_ASN1_UNIVERSAL &&
 246                     (asn1_tags.imp_tag == V_ASN1_SEQUENCE ||
 247                     asn1_tags.imp_tag == V_ASN1_SET))
 248                         hdr_constructed = V_ASN1_CONSTRUCTED;
 249                 ASN1_put_object(&p, hdr_constructed, hdr_len,
 250                     asn1_tags.imp_tag, asn1_tags.imp_class);
 251         }
 252
 253         /* Copy across original encoding */
 254         memcpy(p, cpy_start, cpy_len);
 255
 256         cp = new_der;
 257
 258         /* Obtain new ASN1_TYPE structure */
 259         ret = d2i_ASN1_TYPE(NULL, &cp, len);
 260
 261 err:
 262         free(orig_der);
 263         free(new_der);
 264
 265         return ret;
 266 }
 267
 268 static int
 269 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                 /* Look for the ':' in name value pairs */
 281                 if (*p == ':') {
 282                         vstart = p + 1;
 283                         vlen = len - (vstart - elem);
 284                         len = p - elem;
 285                         break;
 286                 }
 287         }
 288
 289         utype = asn1_str2tag(elem, len);
 290
 291         if (utype == -1) {
 292                 ASN1error(ASN1_R_UNKNOWN_TAG);
 293                 ERR_asprintf_error_data("tag=%s", elem);
 294                 return -1;
 295         }
 296
 297         /* If this is not a modifier mark end of string and exit */
 298         if (!(utype & ASN1_GEN_FLAG)) {
 299                 arg->utype = utype;
 300                 arg->str = vstart;
 301                 /* If no value and not end of string, error */
 302                 if (!vstart && elem[len]) {
 303                         ASN1error(ASN1_R_MISSING_VALUE);
 304                         return -1;
 305                 }
 306                 return 0;
 307         }
 308
 309         switch (utype) {
 310
 311         case ASN1_GEN_FLAG_IMP:
 312                 /* Check for illegal multiple IMPLICIT tagging */
 313                 if (arg->imp_tag != -1) {
 314                         ASN1error(ASN1_R_ILLEGAL_NESTED_TAGGING);
 315                         return -1;
 316                 }
 317                 if (!parse_tagging(vstart, vlen, &arg->imp_tag,
 318                     &arg->imp_class))
 319                         return -1;
 320                 break;
 321
 322         case ASN1_GEN_FLAG_EXP:
 323                 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
 324                         return -1;
 325                 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
 326                         return -1;
 327                 break;
 328
 329         case ASN1_GEN_FLAG_SEQWRAP:
 330                 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
 331                         return -1;
 332                 break;
 333
 334         case ASN1_GEN_FLAG_SETWRAP:
 335                 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
 336                         return -1;
 337                 break;
 338
 339         case ASN1_GEN_FLAG_BITWRAP:
 340                 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
 341                         return -1;
 342                 break;
 343
 344         case ASN1_GEN_FLAG_OCTWRAP:
 345                 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
 346                         return -1;
 347                 break;
 348
 349         case ASN1_GEN_FLAG_FORMAT:
 350                 if (vstart == NULL) {
 351                         ASN1error(ASN1_R_ILLEGAL_FORMAT);
 352                         return -1;
 353                 }
 354                 if (!strncmp(vstart, "ASCII", 5))
 355                         arg->format = ASN1_GEN_FORMAT_ASCII;
 356                 else if (!strncmp(vstart, "UTF8", 4))
 357                         arg->format = ASN1_GEN_FORMAT_UTF8;
 358                 else if (!strncmp(vstart, "HEX", 3))
 359                         arg->format = ASN1_GEN_FORMAT_HEX;
 360                 else if (!strncmp(vstart, "BITLIST", 7))
 361                         arg->format = ASN1_GEN_FORMAT_BITLIST;
 362                 else {
 363                         ASN1error(ASN1_R_UNKOWN_FORMAT);
 364                         return -1;
 365                 }
 366                 break;
 367
 368         }
 369
 370         return 1;
 371 }
 372
 373 static int
 374 parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
 375 {
 376         long tag_num;
 377         char *eptr;
 378
 379         if (!vstart)
 380                 return 0;
 381         tag_num = strtoul(vstart, &eptr, 10);
 382         /* Check we haven't gone past max length: should be impossible */
 383         if (eptr && *eptr && (eptr > vstart + vlen))
 384                 return 0;
 385         if (tag_num < 0) {
 386                 ASN1error(ASN1_R_INVALID_NUMBER);
 387                 return 0;
 388         }
 389         *ptag = tag_num;
 390         /* If we have non numeric characters, parse them */
 391         if (eptr)
 392                 vlen -= eptr - vstart;
 393         else
 394                 vlen = 0;
 395         if (vlen) {
 396                 switch (*eptr) {
 397
 398                 case 'U':
 399                         *pclass = V_ASN1_UNIVERSAL;
 400                         break;
 401
 402                 case 'A':
 403                         *pclass = V_ASN1_APPLICATION;
 404                         break;
 405
 406                 case 'P':
 407                         *pclass = V_ASN1_PRIVATE;
 408                         break;
 409
 410                 case 'C':
 411                         *pclass = V_ASN1_CONTEXT_SPECIFIC;
 412                         break;
 413
 414                 default:
 415                         ASN1error(ASN1_R_INVALID_MODIFIER);
 416                         ERR_asprintf_error_data("Char=%c", *eptr);
 417                         return 0;
 418                         break;
 419
 420                 }
 421         } else
 422                 *pclass = V_ASN1_CONTEXT_SPECIFIC;
 423
 424         return 1;
 425
 426 }
 427
 428 /* Handle multiple types: SET and SEQUENCE */
 429
 430 static ASN1_TYPE *
 431 asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
 432 {
 433         ASN1_TYPE *ret = NULL;
 434         STACK_OF(ASN1_TYPE) *sk = NULL;
 435         STACK_OF(CONF_VALUE) *sect = NULL;
 436         unsigned char *der = NULL;
 437         int derlen;
 438         int i;
 439         sk = sk_ASN1_TYPE_new_null();
 440         if (!sk)
 441                 goto bad;
 442         if (section) {
 443                 if (!cnf)
 444                         goto bad;
 445                 sect = X509V3_get_section(cnf, (char *)section);
 446                 if (!sect)
 447                         goto bad;
 448                 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
 449                         ASN1_TYPE *typ = ASN1_generate_v3(
 450                             sk_CONF_VALUE_value(sect, i)->value, cnf);
 451                         if (!typ)
 452                                 goto bad;
 453                         if (!sk_ASN1_TYPE_push(sk, typ))
 454                                 goto bad;
 455                 }
 456         }
 457
 458         /* Now we has a STACK of the components, convert to the correct form */
 459
 460         if (utype == V_ASN1_SET)
 461                 derlen = i2d_ASN1_SET_ANY(sk, &der);
 462         else
 463                 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);
 464
 465         if (derlen < 0)
 466                 goto bad;
 467
 468         if (!(ret = ASN1_TYPE_new()))
 469                 goto bad;
 470
 471         if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
 472                 goto bad;
 473
 474         ret->type = utype;
 475
 476         ret->value.asn1_string->data = der;
 477         ret->value.asn1_string->length = derlen;
 478
 479         der = NULL;
 480
 481 bad:
 482         free(der);
 483         if (sk)
 484                 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
 485         if (sect)
 486                 X509V3_section_free(cnf, sect);
 487
 488         return ret;
 489 }
 490
 491 static int
 492 append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed,
 493     int exp_pad, int imp_ok)
 494 {
 495         tag_exp_type *exp_tmp;
 496
 497         /* Can only have IMPLICIT if permitted */
 498         if ((arg->imp_tag != -1) && !imp_ok) {
 499                 ASN1error(ASN1_R_ILLEGAL_IMPLICIT_TAG);
 500                 return 0;
 501         }
 502
 503         if (arg->exp_count == ASN1_FLAG_EXP_MAX) {
 504                 ASN1error(ASN1_R_DEPTH_EXCEEDED);
 505                 return 0;
 506         }
 507
 508         exp_tmp = &arg->exp_list[arg->exp_count++];
 509
 510         /* If IMPLICIT set tag to implicit value then
 511          * reset implicit tag since it has been used.
 512          */
 513         if (arg->imp_tag != -1) {
 514                 exp_tmp->exp_tag = arg->imp_tag;
 515                 exp_tmp->exp_class = arg->imp_class;
 516                 arg->imp_tag = -1;
 517                 arg->imp_class = -1;
 518         } else {
 519                 exp_tmp->exp_tag = exp_tag;
 520                 exp_tmp->exp_class = exp_class;
 521         }
 522         exp_tmp->exp_constructed = exp_constructed;
 523         exp_tmp->exp_pad = exp_pad;
 524
 525         return 1;
 526 }
 527
 528 static int
 529 asn1_str2tag(const char *tagstr, int len)
 530 {
 531         unsigned int i;
 532         static const struct tag_name_st *tntmp, tnst [] = {
 533                 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
 534                 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
 535                 ASN1_GEN_STR("NULL", V_ASN1_NULL),
 536                 ASN1_GEN_STR("INT", V_ASN1_INTEGER),
 537                 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
 538                 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
 539                 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
 540                 ASN1_GEN_STR("OID", V_ASN1_OBJECT),
 541                 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
 542                 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
 543                 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
 544                 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
 545                 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
 546                 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
 547                 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
 548                 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
 549                 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
 550                 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
 551                 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
 552                 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
 553                 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
 554                 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
 555                 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
 556                 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
 557                 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
 558                 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
 559                 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
 560                 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
 561                 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
 562                 ASN1_GEN_STR("T61", V_ASN1_T61STRING),
 563                 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
 564                 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
 565                 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
 566                 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
 567                 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
 568                 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),
 569
 570                 /* Special cases */
 571                 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
 572                 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
 573                 ASN1_GEN_STR("SET", V_ASN1_SET),
 574                 /* type modifiers */
 575                 /* Explicit tag */
 576                 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
 577                 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
 578                 /* Implicit tag */
 579                 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
 580                 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
 581                 /* OCTET STRING wrapper */
 582                 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
 583                 /* SEQUENCE wrapper */
 584                 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
 585                 /* SET wrapper */
 586                 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
 587                 /* BIT STRING wrapper */
 588                 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
 589                 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
 590                 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
 591         };
 592
 593         if (len == -1)
 594                 len = strlen(tagstr);
 595
 596         tntmp = tnst;
 597         for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st);
 598             i++, tntmp++) {
 599                 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
 600                         return tntmp->tag;
 601         }
 602
 603         return -1;
 604 }
 605
 606 static ASN1_TYPE *
 607 asn1_str2type(const char *str, int format, int utype)
 608 {
 609         ASN1_TYPE *atmp = NULL;
 610         CONF_VALUE vtmp;
 611         unsigned char *rdata;
 612         long rdlen;
 613         int no_unused = 1;
 614
 615         if (!(atmp = ASN1_TYPE_new())) {
 616                 ASN1error(ERR_R_MALLOC_FAILURE);
 617                 return NULL;
 618         }
 619
 620         if (!str)
 621                 str = "";
 622
 623         switch (utype) {
 624
 625         case V_ASN1_NULL:
 626                 if (str && *str) {
 627                         ASN1error(ASN1_R_ILLEGAL_NULL_VALUE);
 628                         goto bad_form;
 629                 }
 630                 break;
 631
 632         case V_ASN1_BOOLEAN:
 633                 if (format != ASN1_GEN_FORMAT_ASCII) {
 634                         ASN1error(ASN1_R_NOT_ASCII_FORMAT);
 635                         goto bad_form;
 636                 }
 637                 vtmp.name = NULL;
 638                 vtmp.section = NULL;
 639                 vtmp.value = (char *)str;
 640                 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) {
 641                         ASN1error(ASN1_R_ILLEGAL_BOOLEAN);
 642                         goto bad_str;
 643                 }
 644                 break;
 645
 646         case V_ASN1_INTEGER:
 647         case V_ASN1_ENUMERATED:
 648                 if (format != ASN1_GEN_FORMAT_ASCII) {
 649                         ASN1error(ASN1_R_INTEGER_NOT_ASCII_FORMAT);
 650                         goto bad_form;
 651                 }
 652                 if (!(atmp->value.integer =
 653                     s2i_ASN1_INTEGER(NULL, (char *)str))) {
 654                         ASN1error(ASN1_R_ILLEGAL_INTEGER);
 655                         goto bad_str;
 656                 }
 657                 break;
 658
 659         case V_ASN1_OBJECT:
 660                 if (format != ASN1_GEN_FORMAT_ASCII) {
 661                         ASN1error(ASN1_R_OBJECT_NOT_ASCII_FORMAT);
 662                         goto bad_form;
 663                 }
 664                 if (!(atmp->value.object = OBJ_txt2obj(str, 0))) {
 665                         ASN1error(ASN1_R_ILLEGAL_OBJECT);
 666                         goto bad_str;
 667                 }
 668                 break;
 669
 670         case V_ASN1_UTCTIME:
 671         case V_ASN1_GENERALIZEDTIME:
 672                 if (format != ASN1_GEN_FORMAT_ASCII) {
 673                         ASN1error(ASN1_R_TIME_NOT_ASCII_FORMAT);
 674                         goto bad_form;
 675                 }
 676                 if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
 677                         ASN1error(ERR_R_MALLOC_FAILURE);
 678                         goto bad_str;
 679                 }
 680                 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) {
 681                         ASN1error(ERR_R_MALLOC_FAILURE);
 682                         goto bad_str;
 683                 }
 684                 atmp->value.asn1_string->type = utype;
 685                 if (!ASN1_TIME_check(atmp->value.asn1_string)) {
 686                         ASN1error(ASN1_R_ILLEGAL_TIME_VALUE);
 687                         goto bad_str;
 688                 }
 689                 break;
 690
 691         case V_ASN1_BMPSTRING:
 692         case V_ASN1_PRINTABLESTRING:
 693         case V_ASN1_IA5STRING:
 694         case V_ASN1_T61STRING:
 695         case V_ASN1_UTF8STRING:
 696         case V_ASN1_VISIBLESTRING:
 697         case V_ASN1_UNIVERSALSTRING:
 698         case V_ASN1_GENERALSTRING:
 699         case V_ASN1_NUMERICSTRING:
 700
 701                 if (format == ASN1_GEN_FORMAT_ASCII)
 702                         format = MBSTRING_ASC;
 703                 else if (format == ASN1_GEN_FORMAT_UTF8)
 704                         format = MBSTRING_UTF8;
 705                 else {
 706                         ASN1error(ASN1_R_ILLEGAL_FORMAT);
 707                         goto bad_form;
 708                 }
 709
 710                 if (ASN1_mbstring_copy(&atmp->value.asn1_string,
 711                     (unsigned char *)str, -1, format,
 712                     ASN1_tag2bit(utype)) <= 0) {
 713                         ASN1error(ERR_R_MALLOC_FAILURE);
 714                         goto bad_str;
 715                 }
 716                 break;
 717
 718         case V_ASN1_BIT_STRING:
 719         case V_ASN1_OCTET_STRING:
 720                 if (!(atmp->value.asn1_string = ASN1_STRING_new())) {
 721                         ASN1error(ERR_R_MALLOC_FAILURE);
 722                         goto bad_form;
 723                 }
 724
 725                 if (format == ASN1_GEN_FORMAT_HEX) {
 726
 727                         if (!(rdata = string_to_hex((char *)str, &rdlen))) {
 728                                 ASN1error(ASN1_R_ILLEGAL_HEX);
 729                                 goto bad_str;
 730                         }
 731
 732                         atmp->value.asn1_string->data = rdata;
 733                         atmp->value.asn1_string->length = rdlen;
 734                         atmp->value.asn1_string->type = utype;
 735
 736                 } else if (format == ASN1_GEN_FORMAT_ASCII) {
 737                         if (ASN1_STRING_set(atmp->value.asn1_string, str,
 738                             -1) == 0) {
 739                                 ASN1error(ERR_R_MALLOC_FAILURE);
 740                                 goto bad_str;
 741                         }
 742                 } else if ((format == ASN1_GEN_FORMAT_BITLIST) &&
 743                     (utype == V_ASN1_BIT_STRING)) {
 744                         if (!CONF_parse_list(str, ',', 1, bitstr_cb,
 745                             atmp->value.bit_string)) {
 746                                 ASN1error(ASN1_R_LIST_ERROR);
 747                                 goto bad_str;
 748                         }
 749                         no_unused = 0;
 750
 751                 } else {
 752                         ASN1error(ASN1_R_ILLEGAL_BITSTRING_FORMAT);
 753                         goto bad_form;
 754                 }
 755
 756                 if ((utype == V_ASN1_BIT_STRING) && no_unused) {
 757                         atmp->value.asn1_string->flags &=
 758                             ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
 759                         atmp->value.asn1_string->flags |=
 760                             ASN1_STRING_FLAG_BITS_LEFT;
 761                 }
 762
 763                 break;
 764
 765         default:
 766                 ASN1error(ASN1_R_UNSUPPORTED_TYPE);
 767                 goto bad_str;
 768                 break;
 769         }
 770
 771         atmp->type = utype;
 772         return atmp;
 773
 774 bad_str:
 775         ERR_asprintf_error_data("string=%s", str);
 776 bad_form:
 777         ASN1_TYPE_free(atmp);
 778         return NULL;
 779 }
 780
 781 static int
 782 bitstr_cb(const char *elem, int len, void *bitstr)
 783 {
 784         long bitnum;
 785         char *eptr;
 786
 787         if (!elem)
 788                 return 0;
 789         bitnum = strtoul(elem, &eptr, 10);
 790         if (eptr && *eptr && (eptr != elem + len))
 791                 return 0;
 792         if (bitnum < 0) {
 793                 ASN1error(ASN1_R_INVALID_NUMBER);
 794                 return 0;
 795         }
 796         if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) {
 797                 ASN1error(ERR_R_MALLOC_FAILURE);
 798                 return 0;
 799         }
 800         return 1;
 801 }