crypto/asn1/asn1_gen.c

   1 /* asn1_gen.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 2002.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2002 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include "cryptlib.h"
  60 #include <openssl/asn1.h>
  61 #include <openssl/x509v3.h>
  62
  63 #define ASN1_GEN_FLAG           0x10000
  64 #define ASN1_GEN_FLAG_IMP       (ASN1_GEN_FLAG|1)
  65 #define ASN1_GEN_FLAG_EXP       (ASN1_GEN_FLAG|2)
  66 #define ASN1_GEN_FLAG_TAG       (ASN1_GEN_FLAG|3)
  67 #define ASN1_GEN_FLAG_BITWRAP   (ASN1_GEN_FLAG|4)
  68 #define ASN1_GEN_FLAG_OCTWRAP   (ASN1_GEN_FLAG|5)
  69 #define ASN1_GEN_FLAG_SEQWRAP   (ASN1_GEN_FLAG|6)
  70 #define ASN1_GEN_FLAG_SETWRAP   (ASN1_GEN_FLAG|7)
  71 #define ASN1_GEN_FLAG_FORMAT    (ASN1_GEN_FLAG|8)
  72
  73 #define ASN1_GEN_STR(str,val)   {str, sizeof(str) - 1, val}
  74
  75 #define ASN1_FLAG_EXP_MAX       20
  76
  77 /* Input formats */
  78
  79 /* ASCII: default */
  80 #define ASN1_GEN_FORMAT_ASCII   1
  81 /* UTF8 */
  82 #define ASN1_GEN_FORMAT_UTF8    2
  83 /* Hex */
  84 #define ASN1_GEN_FORMAT_HEX     3
  85 /* List of bits */
  86 #define ASN1_GEN_FORMAT_BITLIST 4
  87
  88
  89 struct tag_name_st
  90         {
  91         const char *strnam;
  92         int len;
  93         int tag;
  94         };
  95
  96 typedef struct
  97         {
  98         int exp_tag;
  99         int exp_class;
 100         int exp_constructed;
 101         int exp_pad;
 102         long exp_len;
 103         } tag_exp_type;
 104
 105 typedef struct
 106         {
 107         int imp_tag;
 108         int imp_class;
 109         int utype;
 110         int format;
 111         const char *str;
 112         tag_exp_type exp_list[ASN1_FLAG_EXP_MAX];
 113         int exp_count;
 114         } tag_exp_arg;
 115
 116 static int bitstr_cb(const char *elem, int len, void *bitstr);
 117 static int asn1_cb(const char *elem, int len, void *bitstr);
 118 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok);
 119 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass);
 120 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf);
 121 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype);
 122 static int asn1_str2tag(const char *tagstr, int len);
 123
 124 ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf)
 125         {
 126         X509V3_CTX cnf;
 127
 128         if (!nconf)
 129                 return ASN1_generate_v3(str, NULL);
 130
 131         X509V3_set_nconf(&cnf, nconf);
 132         return ASN1_generate_v3(str, &cnf);
 133         }
 134
 135 ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf)
 136         {
 137         ASN1_TYPE *ret;
 138         tag_exp_arg asn1_tags;
 139         tag_exp_type *etmp;
 140
 141         int i, len;
 142
 143         unsigned char *orig_der = NULL, *new_der = NULL;
 144         const unsigned char *cpy_start;
 145         unsigned char *p;
 146         const unsigned char *cp;
 147         int cpy_len;
 148         long hdr_len;
 149         int hdr_constructed = 0, hdr_tag, hdr_class;
 150         int r;
 151
 152         asn1_tags.imp_tag = -1;
 153         asn1_tags.imp_class = -1;
 154         asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
 155         asn1_tags.exp_count = 0;
 156         if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0)
 157                 return NULL;
 158
 159         if ((asn1_tags.utype == V_ASN1_SEQUENCE) || (asn1_tags.utype == V_ASN1_SET))
 160                 {
 161                 if (!cnf)
 162                         {
 163                         ASN1err(ASN1_F_ASN1_GENERATE_V3, ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG);
 164                         return NULL;
 165                         }
 166                 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf);
 167                 }
 168         else
 169                 ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype);
 170
 171         if (!ret)
 172                 return NULL;
 173
 174         /* If no tagging return base type */
 175         if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0))
 176                 return ret;
 177
 178         /* Generate the encoding */
 179         cpy_len = i2d_ASN1_TYPE(ret, &orig_der);
 180         ASN1_TYPE_free(ret);
 181         ret = NULL;
 182         /* Set point to start copying for modified encoding */
 183         cpy_start = orig_der;
 184
 185         /* Do we need IMPLICIT tagging? */
 186         if (asn1_tags.imp_tag != -1)
 187                 {
 188                 /* If IMPLICIT we will replace the underlying tag */
 189                 /* Skip existing tag+len */
 190                 r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class, cpy_len);
 191                 if (r & 0x80)
 192                         goto err;
 193                 /* Update copy length */
 194                 cpy_len -= cpy_start - orig_der;
 195                 /* For IMPLICIT tagging the length should match the
 196                  * original length and constructed flag should be
 197                  * consistent.
 198                  */
 199                 if (r & 0x1)
 200                         {
 201                         /* Indefinite length constructed */
 202                         hdr_constructed = 2;
 203                         hdr_len = 0;
 204                         }
 205                 else
 206                         /* Just retain constructed flag */
 207                         hdr_constructed = r & V_ASN1_CONSTRUCTED;
 208                 /* Work out new length with IMPLICIT tag: ignore constructed
 209                  * because it will mess up if indefinite length
 210                  */
 211                 len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag);
 212                 }
 213         else
 214                 len = cpy_len;
 215
 216         /* Work out length in any EXPLICIT, starting from end */
 217
 218         for(i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1; i < asn1_tags.exp_count; i++, etmp--)
 219                 {
 220                 /* Content length: number of content octets + any padding */
 221                 len += etmp->exp_pad;
 222                 etmp->exp_len = len;
 223                 /* Total object length: length including new header */
 224                 len = ASN1_object_size(0, len, etmp->exp_tag);
 225                 }
 226
 227         /* Allocate buffer for new encoding */
 228
 229         new_der = OPENSSL_malloc(len);
 230
 231         /* Generate tagged encoding */
 232
 233         p = new_der;
 234
 235         /* Output explicit tags first */
 236
 237         for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count; i++, etmp++)
 238                 {
 239                 ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,
 240                                         etmp->exp_tag, etmp->exp_class);
 241                 if (etmp->exp_pad)
 242                         *p++ = 0;
 243                 }
 244
 245         /* If IMPLICIT, output tag */
 246
 247         if (asn1_tags.imp_tag != -1)
 248                 ASN1_put_object(&p, hdr_constructed, hdr_len,
 249                                         asn1_tags.imp_tag, asn1_tags.imp_class);
 250
 251         /* Copy across original encoding */
 252         memcpy(p, cpy_start, cpy_len);
 253
 254         cp = new_der;
 255
 256         /* Obtain new ASN1_TYPE structure */
 257         ret = d2i_ASN1_TYPE(NULL, &cp, len);
 258
 259         err:
 260         if (orig_der)
 261                 OPENSSL_free(orig_der);
 262         if (new_der)
 263                 OPENSSL_free(new_der);
 264
 265         return ret;
 266
 267         }
 268
 269 static int asn1_cb(const char *elem, int len, void *bitstr)
 270         {
 271         tag_exp_arg *arg = bitstr;
 272         int i;
 273         int utype;
 274         int vlen = 0;
 275         const char *p, *vstart = NULL;
 276
 277         int tmp_tag, tmp_class;
 278
 279         for(i = 0, p = elem; i < len; p++, i++)
 280                 {
 281                 /* Look for the ':' in name value pairs */
 282                 if (*p == ':')
 283                         {
 284                         vstart = p + 1;
 285                         vlen = len - (vstart - elem);
 286                         len = p - elem;
 287                         break;
 288                         }
 289                 }
 290
 291         utype = asn1_str2tag(elem, len);
 292
 293         if (utype == -1)
 294                 {
 295                 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG);
 296                 ERR_add_error_data(2, "tag=", elem);
 297                 return -1;
 298                 }
 299
 300         /* If this is not a modifier mark end of string and exit */
 301         if (!(utype & ASN1_GEN_FLAG))
 302                 {
 303                 arg->utype = utype;
 304                 arg->str = vstart;
 305                 /* If no value and not end of string, error */
 306                 if (!vstart && elem[len])
 307                         {
 308                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE);
 309                         return -1;
 310                         }
 311                 return 0;
 312                 }
 313
 314         switch(utype)
 315                 {
 316
 317                 case ASN1_GEN_FLAG_IMP:
 318                 /* Check for illegal multiple IMPLICIT tagging */
 319                 if (arg->imp_tag != -1)
 320                         {
 321                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING);
 322                         return -1;
 323                         }
 324                 if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
 325                         return -1;
 326                 break;
 327
 328                 case ASN1_GEN_FLAG_EXP:
 329
 330                 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
 331                         return -1;
 332                 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
 333                         return -1;
 334                 break;
 335
 336                 case ASN1_GEN_FLAG_SEQWRAP:
 337                 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
 338                         return -1;
 339                 break;
 340
 341                 case ASN1_GEN_FLAG_SETWRAP:
 342                 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
 343                         return -1;
 344                 break;
 345
 346                 case ASN1_GEN_FLAG_BITWRAP:
 347                 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
 348                         return -1;
 349                 break;
 350
 351                 case ASN1_GEN_FLAG_OCTWRAP:
 352                 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
 353                         return -1;
 354                 break;
 355
 356                 case ASN1_GEN_FLAG_FORMAT:
 357                 if (!strncmp(vstart, "ASCII", 5))
 358                         arg->format = ASN1_GEN_FORMAT_ASCII;
 359                 else if (!strncmp(vstart, "UTF8", 4))
 360                         arg->format = ASN1_GEN_FORMAT_UTF8;
 361                 else if (!strncmp(vstart, "HEX", 3))
 362                         arg->format = ASN1_GEN_FORMAT_HEX;
 363                 else if (!strncmp(vstart, "BITLIST", 3))
 364                         arg->format = ASN1_GEN_FORMAT_BITLIST;
 365                 else
 366                         {
 367                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT);
 368                         return -1;
 369                         }
 370                 break;
 371
 372                 }
 373
 374         return 1;
 375
 376         }
 377
 378 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
 379         {
 380         char erch[2];
 381         long tag_num;
 382         char *eptr;
 383         if (!vstart)
 384                 return 0;
 385         tag_num = strtoul(vstart, &eptr, 10);
 386         /* Check we haven't gone past max length: should be impossible */
 387         if (eptr && *eptr && (eptr > vstart + vlen))
 388                 return 0;
 389         if (tag_num < 0)
 390                 {
 391                 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER);
 392                 return 0;
 393                 }
 394         *ptag = tag_num;
 395         /* If we have non numeric characters, parse them */
 396         if (eptr)
 397                 vlen -= eptr - vstart;
 398         else
 399                 vlen = 0;
 400         if (vlen)
 401                 {
 402                 switch (*eptr)
 403                         {
 404
 405                         case 'U':
 406                         *pclass = V_ASN1_UNIVERSAL;
 407                         break;
 408
 409                         case 'A':
 410                         *pclass = V_ASN1_APPLICATION;
 411                         break;
 412
 413                         case 'P':
 414                         *pclass = V_ASN1_PRIVATE;
 415                         break;
 416
 417                         case 'C':
 418                         *pclass = V_ASN1_CONTEXT_SPECIFIC;
 419                         break;
 420
 421                         default:
 422                         erch[0] = *eptr;
 423                         erch[1] = 0;
 424                         ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER);
 425                         ERR_add_error_data(2, "Char=", erch);
 426                         return 0;
 427                         break;
 428
 429                         }
 430                 }
 431         else
 432                 *pclass = V_ASN1_CONTEXT_SPECIFIC;
 433
 434         return 1;
 435
 436         }
 437
 438 /* Handle multiple types: SET and SEQUENCE */
 439
 440 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
 441         {
 442         ASN1_TYPE *ret = NULL, *typ = NULL;
 443         STACK_OF(ASN1_TYPE) *sk = NULL;
 444         STACK_OF(CONF_VALUE) *sect = NULL;
 445         unsigned char *der = NULL, *p;
 446         int derlen;
 447         int i, is_set;
 448         sk = sk_ASN1_TYPE_new_null();
 449         if (section)
 450                 {
 451                 if (!cnf)
 452                         goto bad;
 453                 sect = X509V3_get_section(cnf, (char *)section);
 454                 if (!sect)
 455                         goto bad;
 456                 for (i = 0; i < sk_CONF_VALUE_num(sect); i++)
 457                         {
 458                         typ = ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf);
 459                         if (!typ)
 460                                 goto bad;
 461                         sk_ASN1_TYPE_push(sk, typ);
 462                         typ = NULL;
 463                         }
 464                 }
 465
 466         /* Now we has a STACK of the components, convert to the correct form */
 467
 468         if (utype == V_ASN1_SET)
 469                 is_set = 1;
 470         else
 471                 is_set = 0;
 472
 473
 474         derlen = i2d_ASN1_SET_OF_ASN1_TYPE(sk, NULL, i2d_ASN1_TYPE, utype,
 475                                            V_ASN1_UNIVERSAL, is_set);
 476         der = OPENSSL_malloc(derlen);
 477         p = der;
 478         i2d_ASN1_SET_OF_ASN1_TYPE(sk, &p, i2d_ASN1_TYPE, utype,
 479                                   V_ASN1_UNIVERSAL, is_set);
 480
 481         if (!(ret = ASN1_TYPE_new()))
 482                 goto bad;
 483
 484         if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
 485                 goto bad;
 486
 487         ret->type = utype;
 488
 489         ret->value.asn1_string->data = der;
 490         ret->value.asn1_string->length = derlen;
 491
 492         der = NULL;
 493
 494         bad:
 495
 496         if (der)
 497                 OPENSSL_free(der);
 498
 499         if (sk)
 500                 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
 501         if (typ)
 502                 ASN1_TYPE_free(typ);
 503         if (sect)
 504                 X509V3_section_free(cnf, sect);
 505
 506         return ret;
 507         }
 508
 509 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok)
 510         {
 511         tag_exp_type *exp_tmp;
 512         /* Can only have IMPLICIT if permitted */
 513         if ((arg->imp_tag != -1) && !imp_ok)
 514                 {
 515                 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);
 516                 return 0;
 517                 }
 518
 519         if (arg->exp_count == ASN1_FLAG_EXP_MAX)
 520                 {
 521                 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED);
 522                 return 0;
 523                 }
 524
 525         exp_tmp = &arg->exp_list[arg->exp_count++];
 526
 527         /* If IMPLICIT set tag to implicit value then
 528          * reset implicit tag since it has been used.
 529          */
 530         if (arg->imp_tag != -1)
 531                 {
 532                 exp_tmp->exp_tag = arg->imp_tag;
 533                 exp_tmp->exp_class = arg->imp_class;
 534                 arg->imp_tag = -1;
 535                 arg->imp_class = -1;
 536                 }
 537         else
 538                 {
 539                 exp_tmp->exp_tag = exp_tag;
 540                 exp_tmp->exp_class = exp_class;
 541                 }
 542         exp_tmp->exp_constructed = exp_constructed;
 543         exp_tmp->exp_pad = exp_pad;
 544
 545         return 1;
 546         }
 547
 548
 549 static int asn1_str2tag(const char *tagstr, int len)
 550         {
 551         unsigned int i;
 552         static struct tag_name_st *tntmp, tnst [] = {
 553                 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
 554                 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
 555                 ASN1_GEN_STR("NULL", V_ASN1_NULL),
 556                 ASN1_GEN_STR("INT", V_ASN1_INTEGER),
 557                 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
 558                 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
 559                 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
 560                 ASN1_GEN_STR("OID", V_ASN1_OBJECT),
 561                 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
 562                 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
 563                 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
 564                 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
 565                 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
 566                 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
 567                 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
 568                 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
 569                 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
 570                 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
 571                 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
 572                 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
 573                 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
 574                 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
 575                 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
 576                 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
 577                 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
 578                 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
 579                 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
 580                 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
 581                 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
 582                 ASN1_GEN_STR("T61", V_ASN1_T61STRING),
 583                 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
 584                 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
 585                 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
 586                 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
 587                 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
 588                 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),
 589
 590                 /* Special cases */
 591                 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
 592                 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
 593                 ASN1_GEN_STR("SET", V_ASN1_SET),
 594                 /* type modifiers */
 595                 /* Explicit tag */
 596                 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
 597                 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
 598                 /* Implicit tag */
 599                 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
 600                 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
 601                 /* OCTET STRING wrapper */
 602                 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
 603                 /* SEQUENCE wrapper */
 604                 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
 605                 /* SET wrapper */
 606                 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
 607                 /* BIT STRING wrapper */
 608                 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
 609                 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
 610                 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
 611         };
 612
 613         if (len == -1)
 614                 len = strlen(tagstr);
 615
 616         tntmp = tnst;
 617         for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++)
 618                 {
 619                 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
 620                         return tntmp->tag;
 621                 }
 622
 623         return -1;
 624         }
 625
 626 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
 627         {
 628         ASN1_TYPE *atmp = NULL;
 629
 630         CONF_VALUE vtmp;
 631
 632         unsigned char *rdata;
 633         long rdlen;
 634
 635         int no_unused = 1;
 636
 637         if (!(atmp = ASN1_TYPE_new()))
 638                 {
 639                 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 640                 return NULL;
 641                 }
 642
 643         if (!str)
 644                 str = "";
 645
 646         switch(utype)
 647                 {
 648
 649                 case V_ASN1_NULL:
 650                 if (str && *str)
 651                         {
 652                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
 653                         goto bad_form;
 654                         }
 655                 break;
 656
 657                 case V_ASN1_BOOLEAN:
 658                 if (format != ASN1_GEN_FORMAT_ASCII)
 659                         {
 660                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
 661                         goto bad_form;
 662                         }
 663                 vtmp.name = NULL;
 664                 vtmp.section = NULL;
 665                 vtmp.value = (char *)str;
 666                 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean))
 667                         {
 668                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
 669                         goto bad_str;
 670                         }
 671                 break;
 672
 673                 case V_ASN1_INTEGER:
 674                 case V_ASN1_ENUMERATED:
 675                 if (format != ASN1_GEN_FORMAT_ASCII)
 676                         {
 677                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
 678                         goto bad_form;
 679                         }
 680                 if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str)))
 681                         {
 682                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
 683                         goto bad_str;
 684                         }
 685                 break;
 686
 687                 case V_ASN1_OBJECT:
 688                 if (format != ASN1_GEN_FORMAT_ASCII)
 689                         {
 690                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
 691                         goto bad_form;
 692                         }
 693                 if (!(atmp->value.object = OBJ_txt2obj(str, 0)))
 694                         {
 695                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
 696                         goto bad_str;
 697                         }
 698                 break;
 699
 700                 case V_ASN1_UTCTIME:
 701                 case V_ASN1_GENERALIZEDTIME:
 702                 if (format != ASN1_GEN_FORMAT_ASCII)
 703                         {
 704                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
 705                         goto bad_form;
 706                         }
 707                 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
 708                         {
 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                         {
 714                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 715                         goto bad_str;
 716                         }
 717                 atmp->value.asn1_string->type = utype;
 718                 if (!ASN1_TIME_check(atmp->value.asn1_string))
 719                         {
 720                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
 721                         goto bad_str;
 722                         }
 723
 724                 break;
 725
 726                 case V_ASN1_BMPSTRING:
 727                 case V_ASN1_PRINTABLESTRING:
 728                 case V_ASN1_IA5STRING:
 729                 case V_ASN1_T61STRING:
 730                 case V_ASN1_UTF8STRING:
 731                 case V_ASN1_VISIBLESTRING:
 732                 case V_ASN1_UNIVERSALSTRING:
 733                 case V_ASN1_GENERALSTRING:
 734                 case V_ASN1_NUMERICSTRING:
 735
 736                 if (format == ASN1_GEN_FORMAT_ASCII)
 737                         format = MBSTRING_ASC;
 738                 else if (format == ASN1_GEN_FORMAT_UTF8)
 739                         format = MBSTRING_UTF8;
 740                 else
 741                         {
 742                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
 743                         goto bad_form;
 744                         }
 745
 746
 747                 if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
 748                                                 -1, format, ASN1_tag2bit(utype)) <= 0)
 749                         {
 750                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 751                         goto bad_str;
 752                         }
 753
 754
 755                 break;
 756
 757                 case V_ASN1_BIT_STRING:
 758
 759                 case V_ASN1_OCTET_STRING:
 760
 761                 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
 762                         {
 763                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 764                         goto bad_form;
 765                         }
 766
 767                 if (format == ASN1_GEN_FORMAT_HEX)
 768                         {
 769
 770                         if (!(rdata = string_to_hex((char *)str, &rdlen)))
 771                                 {
 772                                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
 773                                 goto bad_str;
 774                                 }
 775
 776                         atmp->value.asn1_string->data = rdata;
 777                         atmp->value.asn1_string->length = rdlen;
 778                         atmp->value.asn1_string->type = utype;
 779
 780                         }
 781                 else if (format == ASN1_GEN_FORMAT_ASCII)
 782                         ASN1_STRING_set(atmp->value.asn1_string, str, -1);
 783                 else if ((format == ASN1_GEN_FORMAT_BITLIST) && (utype == V_ASN1_BIT_STRING))
 784                         {
 785                         if (!CONF_parse_list(str, ',', 1, bitstr_cb, atmp->value.bit_string))
 786                                 {
 787                                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
 788                                 goto bad_str;
 789                                 }
 790                         no_unused = 0;
 791
 792                         }
 793                 else
 794                         {
 795                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
 796                         goto bad_form;
 797                         }
 798
 799                 if ((utype == V_ASN1_BIT_STRING) && no_unused)
 800                         {
 801                         atmp->value.asn1_string->flags
 802                                 &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 803                         atmp->value.asn1_string->flags
 804                                 |= ASN1_STRING_FLAG_BITS_LEFT;
 805                         }
 806
 807
 808                 break;
 809
 810                 default:
 811                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
 812                 goto bad_str;
 813                 break;
 814                 }
 815
 816
 817         atmp->type = utype;
 818         return atmp;
 819
 820
 821         bad_str:
 822         ERR_add_error_data(2, "string=", str);
 823         bad_form:
 824
 825         ASN1_TYPE_free(atmp);
 826         return NULL;
 827
 828         }
 829
 830 static int bitstr_cb(const char *elem, int len, void *bitstr)
 831         {
 832         long bitnum;
 833         char *eptr;
 834         if (!elem)
 835                 return 0;
 836         bitnum = strtoul(elem, &eptr, 10);
 837         if (eptr && *eptr && (eptr != elem + len))
 838                 return 0;
 839         if (bitnum < 0)
 840                 {
 841                 ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
 842                 return 0;
 843                 }
 844         if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1))
 845                 {
 846                 ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
 847                 return 0;
 848                 }
 849         return 1;
 850         }
 851