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         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         unsigned char *cpy_start, *p;
 145         int cpy_len;
 146         long hdr_len;
 147         int hdr_constructed = 0, hdr_tag, hdr_class;
 148         int r;
 149
 150         asn1_tags.imp_tag = -1;
 151         asn1_tags.imp_class = -1;
 152         asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
 153         asn1_tags.exp_count = 0;
 154         if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0)
 155                 return NULL;
 156
 157         if ((asn1_tags.utype == V_ASN1_SEQUENCE) || (asn1_tags.utype == V_ASN1_SET))
 158                 {
 159                 if (!cnf)
 160                         {
 161                         ASN1err(ASN1_F_ASN1_GENERATE_V3, ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG);
 162                         return NULL;
 163                         }
 164                 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf);
 165                 }
 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                 {
 186                 /* If IMPLICIT we will replace the underlying tag */
 187                 /* Skip existing tag+len */
 188                 r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class, cpy_len);
 189                 if (r & 0x80)
 190                         goto err;
 191                 /* Update copy length */
 192                 cpy_len -= cpy_start - orig_der;
 193                 /* For IMPLICIT tagging the length should match the
 194                  * original length and constructed flag should be
 195                  * consistent.
 196                  */
 197                 if (r & 0x1)
 198                         {
 199                         /* Indefinite length constructed */
 200                         hdr_constructed = 2;
 201                         hdr_len = 0;
 202                         }
 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                 }
 211         else
 212                 len = cpy_len;
 213
 214         /* Work out length in any EXPLICIT, starting from end */
 215
 216         for(i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1; i < asn1_tags.exp_count; i++, etmp--)
 217                 {
 218                 /* Content length: number of content octets + any padding */
 219                 len += etmp->exp_pad;
 220                 etmp->exp_len = len;
 221                 /* Total object length: length including new header */
 222                 len = ASN1_object_size(0, len, etmp->exp_tag);
 223                 }
 224
 225         /* Allocate buffer for new encoding */
 226
 227         new_der = OPENSSL_malloc(len);
 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; i++, etmp++)
 236                 {
 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         p = new_der;
 253
 254         /* Obtain new ASN1_TYPE structure */
 255         ret = d2i_ASN1_TYPE(NULL, &p, 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                 {
 279                 /* Look for the ':' in name value pairs */
 280                 if (*p == ':')
 281                         {
 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                 {
 293                 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG);
 294                 ERR_add_error_data(2, "tag=", elem);
 295                 return -1;
 296                 }
 297
 298         /* If this is not a modifier mark end of string and exit */
 299         if (!(utype & ASN1_GEN_FLAG))
 300                 {
 301                 arg->utype = utype;
 302                 arg->str = vstart;
 303                 /* If no value and not end of string, error */
 304                 if (!vstart && elem[len])
 305                         {
 306                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE);
 307                         return -1;
 308                         }
 309                 return 0;
 310                 }
 311
 312         switch(utype)
 313                 {
 314
 315                 case ASN1_GEN_FLAG_IMP:
 316                 /* Check for illegal multiple IMPLICIT tagging */
 317                 if (arg->imp_tag != -1)
 318                         {
 319                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING);
 320                         return -1;
 321                         }
 322                 if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
 323                         return -1;
 324                 break;
 325
 326                 case ASN1_GEN_FLAG_EXP:
 327
 328                 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
 329                         return -1;
 330                 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
 331                         return -1;
 332                 break;
 333
 334                 case ASN1_GEN_FLAG_SEQWRAP:
 335                 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
 336                         return -1;
 337                 break;
 338
 339                 case ASN1_GEN_FLAG_SETWRAP:
 340                 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
 341                         return -1;
 342                 break;
 343
 344                 case ASN1_GEN_FLAG_BITWRAP:
 345                 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
 346                         return -1;
 347                 break;
 348
 349                 case ASN1_GEN_FLAG_OCTWRAP:
 350                 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
 351                         return -1;
 352                 break;
 353
 354                 case ASN1_GEN_FLAG_FORMAT:
 355                 if (!strncmp(vstart, "ASCII", 5))
 356                         arg->format = ASN1_GEN_FORMAT_ASCII;
 357                 else if (!strncmp(vstart, "UTF8", 4))
 358                         arg->format = ASN1_GEN_FORMAT_UTF8;
 359                 else if (!strncmp(vstart, "HEX", 3))
 360                         arg->format = ASN1_GEN_FORMAT_HEX;
 361                 else if (!strncmp(vstart, "BITLIST", 3))
 362                         arg->format = ASN1_GEN_FORMAT_BITLIST;
 363                 else
 364                         {
 365                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT);
 366                         return -1;
 367                         }
 368                 break;
 369
 370                 }
 371
 372         return 1;
 373
 374         }
 375
 376 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
 377         {
 378         char erch[2];
 379         long tag_num;
 380         char *eptr;
 381         if (!vstart)
 382                 return 0;
 383         tag_num = strtoul(vstart, &eptr, 10);
 384         /* Check we haven't gone past max length: should be impossible */
 385         if (eptr && *eptr && (eptr > vstart + vlen))
 386                 return 0;
 387         if (tag_num < 0)
 388                 {
 389                 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER);
 390                 return 0;
 391                 }
 392         *ptag = tag_num;
 393         /* If we have non numeric characters, parse them */
 394         if (eptr)
 395                 vlen -= eptr - vstart;
 396         else
 397                 vlen = 0;
 398         if (vlen)
 399                 {
 400                 switch (*eptr)
 401                         {
 402
 403                         case 'U':
 404                         *pclass = V_ASN1_UNIVERSAL;
 405                         break;
 406
 407                         case 'A':
 408                         *pclass = V_ASN1_APPLICATION;
 409                         break;
 410
 411                         case 'P':
 412                         *pclass = V_ASN1_PRIVATE;
 413                         break;
 414
 415                         case 'C':
 416                         *pclass = V_ASN1_CONTEXT_SPECIFIC;
 417                         break;
 418
 419                         default:
 420                         erch[0] = *eptr;
 421                         erch[1] = 0;
 422                         ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER);
 423                         ERR_add_error_data(2, "Char=", erch);
 424                         return 0;
 425                         break;
 426
 427                         }
 428                 }
 429         else
 430                 *pclass = V_ASN1_CONTEXT_SPECIFIC;
 431
 432         return 1;
 433
 434         }
 435
 436 /* Handle multiple types: SET and SEQUENCE */
 437
 438 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
 439         {
 440         ASN1_TYPE *ret = NULL, *typ = NULL;
 441         STACK_OF(ASN1_TYPE) *sk = NULL;
 442         STACK_OF(CONF_VALUE) *sect = NULL;
 443         unsigned char *der = NULL, *p;
 444         int derlen;
 445         int i, is_set;
 446         sk = sk_ASN1_TYPE_new_null();
 447         if (section)
 448                 {
 449                 if (!cnf)
 450                         goto bad;
 451                 sect = X509V3_get_section(cnf, (char *)section);
 452                 if (!sect)
 453                         goto bad;
 454                 for (i = 0; i < sk_CONF_VALUE_num(sect); i++)
 455                         {
 456                         typ = ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf);
 457                         if (!typ)
 458                                 goto bad;
 459                         sk_ASN1_TYPE_push(sk, typ);
 460                         typ = NULL;
 461                         }
 462                 }
 463
 464         /* Now we has a STACK of the components, convert to the correct form */
 465
 466         if (utype == V_ASN1_SET)
 467                 is_set = 1;
 468         else
 469                 is_set = 0;
 470
 471
 472         derlen = i2d_ASN1_SET((STACK *)sk, NULL, i2d_ASN1_TYPE, utype, V_ASN1_UNIVERSAL, is_set);
 473         der = OPENSSL_malloc(derlen);
 474         p = der;
 475         i2d_ASN1_SET((STACK *)sk, &p, i2d_ASN1_TYPE, utype, V_ASN1_UNIVERSAL, is_set);
 476
 477         if (!(ret = ASN1_TYPE_new()))
 478                 goto bad;
 479
 480         if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
 481                 goto bad;
 482
 483         ret->type = utype;
 484
 485         ret->value.asn1_string->data = der;
 486         ret->value.asn1_string->length = derlen;
 487
 488         der = NULL;
 489
 490         bad:
 491
 492         if (der)
 493                 OPENSSL_free(der);
 494
 495         if (sk)
 496                 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
 497         if (typ)
 498                 ASN1_TYPE_free(typ);
 499         if (sect)
 500                 X509V3_section_free(cnf, sect);
 501
 502         return ret;
 503         }
 504
 505 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok)
 506         {
 507         tag_exp_type *exp_tmp;
 508         /* Can only have IMPLICIT if permitted */
 509         if ((arg->imp_tag != -1) && !imp_ok)
 510                 {
 511                 ASN1err(ASN1_F_APPEND_TAG, ASN1_R_ILLEGAL_IMPLICIT_TAG);
 512                 return 0;
 513                 }
 514
 515         if (arg->exp_count == ASN1_FLAG_EXP_MAX)
 516                 {
 517                 ASN1err(ASN1_F_APPEND_TAG, ASN1_R_DEPTH_EXCEEDED);
 518                 return 0;
 519                 }
 520
 521         exp_tmp = &arg->exp_list[arg->exp_count++];
 522
 523         /* If IMPLICIT set tag to implicit value then
 524          * reset implicit tag since it has been used.
 525          */
 526         if (arg->imp_tag != -1)
 527                 {
 528                 exp_tmp->exp_tag = arg->imp_tag;
 529                 exp_tmp->exp_class = arg->imp_class;
 530                 arg->imp_tag = -1;
 531                 arg->imp_class = -1;
 532                 }
 533         else
 534                 {
 535                 exp_tmp->exp_tag = exp_tag;
 536                 exp_tmp->exp_class = exp_class;
 537                 }
 538         exp_tmp->exp_constructed = exp_constructed;
 539         exp_tmp->exp_pad = exp_pad;
 540
 541         return 1;
 542         }
 543
 544
 545 static int asn1_str2tag(const char *tagstr, int len)
 546         {
 547         int i;
 548         static struct tag_name_st *tntmp, tnst [] = {
 549                 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
 550                 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
 551                 ASN1_GEN_STR("NULL", V_ASN1_NULL),
 552                 ASN1_GEN_STR("INT", V_ASN1_INTEGER),
 553                 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
 554                 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
 555                 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
 556                 ASN1_GEN_STR("OID", V_ASN1_OBJECT),
 557                 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
 558                 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
 559                 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
 560                 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
 561                 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
 562                 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
 563                 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
 564                 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
 565                 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
 566                 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
 567                 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
 568                 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
 569                 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
 570                 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
 571                 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
 572                 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
 573                 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
 574                 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
 575                 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
 576                 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
 577                 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
 578                 ASN1_GEN_STR("T61", V_ASN1_T61STRING),
 579                 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
 580                 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
 581                 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
 582                 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
 583
 584                 /* Special cases */
 585                 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
 586                 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
 587                 ASN1_GEN_STR("SET", V_ASN1_SET),
 588                 /* type modifiers */
 589                 /* Explicit tag */
 590                 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
 591                 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
 592                 /* Implicit tag */
 593                 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
 594                 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
 595                 /* OCTET STRING wrapper */
 596                 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
 597                 /* SEQUENCE wrapper */
 598                 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
 599                 /* SET wrapper */
 600                 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SEQWRAP),
 601                 /* BIT STRING wrapper */
 602                 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
 603                 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
 604                 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
 605         };
 606
 607         if (len == -1)
 608                 len = strlen(tagstr);
 609
 610         tntmp = tnst;
 611         for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++)
 612                 {
 613                 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
 614                         return tntmp->tag;
 615                 }
 616
 617         return -1;
 618         }
 619
 620 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
 621         {
 622         ASN1_TYPE *atmp = NULL;
 623
 624         CONF_VALUE vtmp;
 625
 626         unsigned char *rdata;
 627         long rdlen;
 628
 629         int no_unused = 1;
 630
 631         if (!(atmp = ASN1_TYPE_new()))
 632                 {
 633                 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 634                 return NULL;
 635                 }
 636
 637         if (!str)
 638                 str = "";
 639
 640         switch(utype)
 641                 {
 642
 643                 case V_ASN1_NULL:
 644                 if (str && *str)
 645                         {
 646                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
 647                         goto bad_form;
 648                         }
 649                 break;
 650
 651                 case V_ASN1_BOOLEAN:
 652                 if (format != ASN1_GEN_FORMAT_ASCII)
 653                         {
 654                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
 655                         goto bad_form;
 656                         }
 657                 vtmp.value = (char *)str;
 658                 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean))
 659                         {
 660                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
 661                         goto bad_str;
 662                         }
 663                 break;
 664
 665                 case V_ASN1_INTEGER:
 666                 case V_ASN1_ENUMERATED:
 667                 if (format != ASN1_GEN_FORMAT_ASCII)
 668                         {
 669                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
 670                         goto bad_form;
 671                         }
 672                 if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str)))
 673                         {
 674                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
 675                         goto bad_str;
 676                         }
 677                 break;
 678
 679                 case V_ASN1_OBJECT:
 680                 if (format != ASN1_GEN_FORMAT_ASCII)
 681                         {
 682                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
 683                         goto bad_form;
 684                         }
 685                 if (!(atmp->value.object = OBJ_txt2obj(str, 0)))
 686                         {
 687                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
 688                         goto bad_str;
 689                         }
 690                 break;
 691
 692                 case V_ASN1_UTCTIME:
 693                 case V_ASN1_GENERALIZEDTIME:
 694                 if (format != ASN1_GEN_FORMAT_ASCII)
 695                         {
 696                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
 697                         goto bad_form;
 698                         }
 699                 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
 700                         {
 701                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 702                         goto bad_str;
 703                         }
 704                 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1))
 705                         {
 706                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 707                         goto bad_str;
 708                         }
 709                 atmp->value.asn1_string->type = utype;
 710                 if (!ASN1_TIME_check(atmp->value.asn1_string))
 711                         {
 712                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
 713                         goto bad_str;
 714                         }
 715
 716                 break;
 717
 718                 case V_ASN1_BMPSTRING:
 719                 case V_ASN1_PRINTABLESTRING:
 720                 case V_ASN1_IA5STRING:
 721                 case V_ASN1_T61STRING:
 722                 case V_ASN1_UTF8STRING:
 723                 case V_ASN1_VISIBLESTRING:
 724                 case V_ASN1_UNIVERSALSTRING:
 725
 726                 if (format == ASN1_GEN_FORMAT_ASCII)
 727                         format = MBSTRING_ASC;
 728                 else if (format == ASN1_GEN_FORMAT_UTF8)
 729                         format = MBSTRING_UTF8;
 730                 else
 731                         {
 732                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
 733                         goto bad_form;
 734                         }
 735
 736
 737                 if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
 738                                                 -1, format, ASN1_tag2bit(utype)) <= 0)
 739                         {
 740                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 741                         goto bad_str;
 742                         }
 743
 744
 745                 break;
 746
 747                 case V_ASN1_BIT_STRING:
 748
 749                 case V_ASN1_OCTET_STRING:
 750
 751                 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
 752                         {
 753                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 754                         goto bad_form;
 755                         }
 756
 757                 if (format == ASN1_GEN_FORMAT_HEX)
 758                         {
 759
 760                         if (!(rdata = string_to_hex((char *)str, &rdlen)))
 761                                 {
 762                                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
 763                                 goto bad_str;
 764                                 }
 765
 766                         atmp->value.asn1_string->data = rdata;
 767                         atmp->value.asn1_string->length = rdlen;
 768                         atmp->value.asn1_string->type = utype;
 769
 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) && (utype == V_ASN1_BIT_STRING))
 774                         {
 775                         if (!CONF_parse_list(str, ',', 1, bitstr_cb, atmp->value.bit_string))
 776                                 {
 777                                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
 778                                 goto bad_str;
 779                                 }
 780                         no_unused = 0;
 781
 782                         }
 783                 else
 784                         {
 785                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
 786                         goto bad_form;
 787                         }
 788
 789                 if ((utype == V_ASN1_BIT_STRING) && no_unused)
 790                         {
 791                         atmp->value.asn1_string->flags
 792                                 &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 793                         atmp->value.asn1_string->flags
 794                                 |= ASN1_STRING_FLAG_BITS_LEFT;
 795                         }
 796
 797
 798                 break;
 799
 800                 default:
 801                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
 802                 goto bad_str;
 803                 break;
 804                 }
 805
 806
 807         atmp->type = utype;
 808         return atmp;
 809
 810
 811         bad_str:
 812         ERR_add_error_data(2, "string=", str);
 813         bad_form:
 814
 815         ASN1_TYPE_free(atmp);
 816         return NULL;
 817
 818         }
 819
 820 static int bitstr_cb(const char *elem, int len, void *bitstr)
 821         {
 822         long bitnum;
 823         char *eptr;
 824         if (!elem)
 825                 return 0;
 826         bitnum = strtoul(elem, &eptr, 10);
 827         if (eptr && *eptr && (eptr != elem + len))
 828                 return 0;
 829         if (bitnum < 0)
 830                 {
 831                 ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
 832                 return 0;
 833                 }
 834         if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1))
 835                 {
 836                 ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
 837                 return 0;
 838                 }
 839         return 1;
 840         }
 841