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_FORMAT    (ASN1_GEN_FLAG|7)
  71
  72 #define ASN1_GEN_STR(str,val)   {str, sizeof(str) - 1, val}
  73
  74 #define ASN1_FLAG_EXP_MAX       20
  75
  76 /* Input formats */
  77
  78 /* ASCII: default */
  79 #define ASN1_GEN_FORMAT_ASCII   1
  80 /* UTF8 */
  81 #define ASN1_GEN_FORMAT_UTF8    2
  82 /* Hex */
  83 #define ASN1_GEN_FORMAT_HEX     3
  84 /* List of bits */
  85 #define ASN1_GEN_FORMAT_BITLIST 4
  86
  87
  88 struct tag_name_st
  89         {
  90         char *strnam;
  91         int len;
  92         int tag;
  93         };
  94
  95 typedef struct
  96         {
  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         {
 106         int imp_tag;
 107         int imp_class;
 108         int utype;
 109         int format;
 110         const char *str;
 111         tag_exp_type exp_list[ASN1_FLAG_EXP_MAX];
 112         int exp_count;
 113         } tag_exp_arg;
 114
 115 static int bitstr_cb(const char *elem, int len, void *bitstr);
 116 static int asn1_cb(const char *elem, int len, void *bitstr);
 117 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, 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 *ASN1_generate_nconf(char *str, CONF *nconf)
 124         {
 125         X509V3_CTX cnf;
 126
 127         if (!nconf)
 128                 return ASN1_generate_v3(str, NULL);
 129
 130         X509V3_set_nconf(&cnf, nconf);
 131         return ASN1_generate_v3(str, &cnf);
 132         }
 133
 134 ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf)
 135         {
 136         ASN1_TYPE *ret;
 137         tag_exp_arg asn1_tags;
 138         tag_exp_type *etmp;
 139
 140         int i, len;
 141
 142         unsigned char *orig_der = NULL, *new_der = NULL;
 143         unsigned char *cpy_start, *p;
 144         int cpy_len;
 145         long hdr_len;
 146         int hdr_constructed, hdr_tag, hdr_class;
 147         int r;
 148
 149         asn1_tags.imp_tag = -1;
 150         asn1_tags.imp_class = -1;
 151         asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
 152         asn1_tags.exp_count = 0;
 153         if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0)
 154                 return NULL;
 155
 156         if ((asn1_tags.utype == V_ASN1_SEQUENCE) || (asn1_tags.utype == V_ASN1_SET))
 157                 {
 158                 if (!cnf)
 159                         {
 160                         ASN1err(ASN1_F_ASN1_GENERATE_V3, ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG);
 161                         return NULL;
 162                         }
 163                 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf);
 164                 }
 165         else
 166                 ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype);
 167
 168         if (!ret)
 169                 return NULL;
 170
 171         /* If no tagging return base type */
 172         if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0))
 173                 return ret;
 174
 175         /* Generate the encoding */
 176         cpy_len = i2d_ASN1_TYPE(ret, &orig_der);
 177         ASN1_TYPE_free(ret);
 178         ret = NULL;
 179         /* Set point to start copying for modified encoding */
 180         cpy_start = orig_der;
 181
 182         /* Do we need IMPLICIT tagging? */
 183         if (asn1_tags.imp_tag != -1)
 184                 {
 185                 /* If IMPLICIT we will replace the underlying tag */
 186                 /* Skip existing tag+len */
 187                 r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class, cpy_len);
 188                 if (r & 0x80)
 189                         goto err;
 190                 /* Update copy length */
 191                 cpy_len -= cpy_start - orig_der;
 192                 /* For IMPLICIT tagging the length should match the
 193                  * original length and constructed flag should be
 194                  * consistent.
 195                  */
 196                 if (r & 0x1)
 197                         {
 198                         /* Indefinite length constructed */
 199                         hdr_constructed = 2;
 200                         hdr_len = 0;
 201                         }
 202                 else
 203                         /* Just retain constructed flag */
 204                         hdr_constructed = r & V_ASN1_CONSTRUCTED;
 205                 /* Work out new length with IMPLICIT tag: ignore constructed
 206                  * because it will mess up if indefinite length
 207                  */
 208                 len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag);
 209                 }
 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; i < asn1_tags.exp_count; i++, etmp--)
 216                 {
 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 = OPENSSL_malloc(len);
 227
 228         /* Generate tagged encoding */
 229
 230         p = new_der;
 231
 232         /* Output explicit tags first */
 233
 234         for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count; i++, etmp++)
 235                 {
 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                 ASN1_put_object(&p, hdr_constructed, hdr_len,
 246                                         asn1_tags.imp_tag, asn1_tags.imp_class);
 247
 248         /* Copy across original encoding */
 249         memcpy(p, cpy_start, cpy_len);
 250
 251         p = new_der;
 252
 253         /* Obtain new ASN1_TYPE structure */
 254         ret = d2i_ASN1_TYPE(NULL, &p, len);
 255
 256         err:
 257         if (orig_der)
 258                 OPENSSL_free(orig_der);
 259         if (new_der)
 260                 OPENSSL_free(new_der);
 261
 262         return ret;
 263
 264         }
 265
 266 static int asn1_cb(const char *elem, int len, void *bitstr)
 267         {
 268         tag_exp_arg *arg = bitstr;
 269         int i;
 270         int utype;
 271         int vlen;
 272         const char *p, *vstart = NULL;
 273
 274         int tmp_tag, tmp_class;
 275
 276         for(i = 0, p = elem; i < len; p++, i++)
 277                 {
 278                 /* Look for the ':' in name value pairs */
 279                 if (*p == ':')
 280                         {
 281                         vstart = p + 1;
 282                         vlen = len - (vstart - elem);
 283                         len = p - elem;
 284                         break;
 285                         }
 286                 }
 287
 288         utype = asn1_str2tag(elem, len);
 289
 290         if (utype == -1)
 291                 {
 292                 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG);
 293                 ERR_add_error_data(2, "tag=", 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                 {
 300                 arg->utype = utype;
 301                 arg->str = vstart;
 302                 /* If no value and not end of string, error */
 303                 if (!vstart && elem[len])
 304                         {
 305                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE);
 306                         return -1;
 307                         }
 308                 return 0;
 309                 }
 310
 311         switch(utype)
 312                 {
 313
 314                 case ASN1_GEN_FLAG_IMP:
 315                 /* Check for illegal multiple IMPLICIT tagging */
 316                 if (arg->imp_tag != -1)
 317                         {
 318                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING);
 319                         return -1;
 320                         }
 321                 if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
 322                         return -1;
 323                 break;
 324
 325                 case ASN1_GEN_FLAG_EXP:
 326
 327                 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
 328                         return -1;
 329                 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
 330                         return -1;
 331                 break;
 332
 333                 case ASN1_GEN_FLAG_SEQWRAP:
 334                 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
 335                         return -1;
 336                 break;
 337
 338                 case ASN1_GEN_FLAG_BITWRAP:
 339                 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
 340                         return -1;
 341                 break;
 342
 343                 case ASN1_GEN_FLAG_OCTWRAP:
 344                 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
 345                         return -1;
 346                 break;
 347
 348                 case ASN1_GEN_FLAG_FORMAT:
 349                 if (!strncmp(vstart, "ASCII", 5))
 350                         arg->format = ASN1_GEN_FORMAT_ASCII;
 351                 else if (!strncmp(vstart, "UTF8", 4))
 352                         arg->format = ASN1_GEN_FORMAT_UTF8;
 353                 else if (!strncmp(vstart, "HEX", 3))
 354                         arg->format = ASN1_GEN_FORMAT_HEX;
 355                 else if (!strncmp(vstart, "BITLIST", 3))
 356                         arg->format = ASN1_GEN_FORMAT_BITLIST;
 357                 else
 358                         {
 359                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT);
 360                         return -1;
 361                         }
 362                 break;
 363
 364                 }
 365
 366         return 1;
 367
 368         }
 369
 370 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
 371         {
 372         char erch[2];
 373         long tag_num;
 374         char *eptr;
 375         if (!vstart)
 376                 return 0;
 377         tag_num = strtoul(vstart, &eptr, 10);
 378         /* Check we haven't gone past max length: should be impossible */
 379         if (eptr && *eptr && (eptr > vstart + vlen))
 380                 return 0;
 381         if (tag_num < 0)
 382                 {
 383                 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER);
 384                 return 0;
 385                 }
 386         *ptag = tag_num;
 387         /* If we have non numeric characters, parse them */
 388         if (eptr)
 389                 vlen -= eptr - vstart;
 390         else
 391                 vlen = 0;
 392         if (vlen)
 393                 {
 394                 switch (*eptr)
 395                         {
 396
 397                         case 'U':
 398                         *pclass = V_ASN1_UNIVERSAL;
 399                         break;
 400
 401                         case 'A':
 402                         *pclass = V_ASN1_APPLICATION;
 403                         break;
 404
 405                         case 'P':
 406                         *pclass = V_ASN1_PRIVATE;
 407                         break;
 408
 409                         case 'C':
 410                         *pclass = V_ASN1_CONTEXT_SPECIFIC;
 411                         break;
 412
 413                         default:
 414                         erch[0] = *eptr;
 415                         erch[1] = 0;
 416                         ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER);
 417                         ERR_add_error_data(2, "Char=", erch);
 418                         return 0;
 419                         break;
 420
 421                         }
 422                 }
 423         else
 424                 *pclass = V_ASN1_CONTEXT_SPECIFIC;
 425
 426         return 1;
 427
 428         }
 429
 430 /* Handle multiple types: SET and SEQUENCE */
 431
 432 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
 433         {
 434         ASN1_TYPE *ret = NULL, *typ = NULL;
 435         STACK_OF(ASN1_TYPE) *sk = NULL;
 436         STACK_OF(CONF_VALUE) *sect = NULL;
 437         unsigned char *der = NULL, *p;
 438         int derlen;
 439         int i, is_set;
 440         sk = sk_ASN1_TYPE_new_null();
 441         if (section)
 442                 {
 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                         {
 450                         typ = ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf);
 451                         if (!typ)
 452                                 goto bad;
 453                         sk_ASN1_TYPE_push(sk, typ);
 454                         typ = NULL;
 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                 is_set = 1;
 462         else
 463                 is_set = 0;
 464
 465
 466         derlen = i2d_ASN1_SET((STACK *)sk, NULL, i2d_ASN1_TYPE, utype, V_ASN1_UNIVERSAL, is_set);
 467         der = OPENSSL_malloc(derlen);
 468         p = der;
 469         i2d_ASN1_SET((STACK *)sk, &p, i2d_ASN1_TYPE, utype, V_ASN1_UNIVERSAL, is_set);
 470
 471         if (!(ret = ASN1_TYPE_new()))
 472                 goto bad;
 473
 474         if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
 475                 goto bad;
 476
 477         ret->type = utype;
 478
 479         ret->value.asn1_string->data = der;
 480         ret->value.asn1_string->length = derlen;
 481
 482         der = NULL;
 483
 484         bad:
 485
 486         if (der)
 487                 OPENSSL_free(der);
 488
 489         if (sk)
 490                 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
 491         if (typ)
 492                 ASN1_TYPE_free(typ);
 493         if (sect)
 494                 X509V3_section_free(cnf, sect);
 495
 496         return ret;
 497         }
 498
 499 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok)
 500         {
 501         tag_exp_type *exp_tmp;
 502         /* Can only have IMPLICIT if permitted */
 503         if ((arg->imp_tag != -1) && !imp_ok)
 504                 {
 505                 ASN1err(ASN1_F_APPEND_TAG, ASN1_R_ILLEGAL_IMPLICIT_TAG);
 506                 return 0;
 507                 }
 508
 509         if (arg->exp_count == ASN1_FLAG_EXP_MAX)
 510                 {
 511                 ASN1err(ASN1_F_APPEND_TAG, ASN1_R_DEPTH_EXCEEDED);
 512                 return 0;
 513                 }
 514
 515         exp_tmp = &arg->exp_list[arg->exp_count++];
 516
 517         /* If IMPLICIT set tag to implicit value then
 518          * reset implicit tag since it has been used.
 519          */
 520         if (arg->imp_tag != -1)
 521                 {
 522                 exp_tmp->exp_tag = arg->imp_tag;
 523                 exp_tmp->exp_class = arg->imp_class;
 524                 arg->imp_tag = -1;
 525                 arg->imp_class = -1;
 526                 }
 527         else
 528                 {
 529                 exp_tmp->exp_tag = exp_tag;
 530                 exp_tmp->exp_class = exp_class;
 531                 }
 532         exp_tmp->exp_constructed = exp_constructed;
 533         exp_tmp->exp_pad = exp_pad;
 534
 535         return 1;
 536         }
 537
 538
 539 static int asn1_str2tag(const char *tagstr, int len)
 540         {
 541         int i;
 542         static struct tag_name_st *tntmp, tnst [] = {
 543                 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
 544                 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
 545                 ASN1_GEN_STR("NULL", V_ASN1_NULL),
 546                 ASN1_GEN_STR("INT", V_ASN1_INTEGER),
 547                 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
 548                 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
 549                 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
 550                 ASN1_GEN_STR("OID", V_ASN1_OBJECT),
 551                 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
 552                 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
 553                 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
 554                 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
 555                 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
 556                 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
 557                 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
 558                 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
 559                 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
 560                 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
 561                 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
 562                 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
 563                 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
 564                 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
 565                 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
 566                 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
 567                 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
 568                 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
 569                 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
 570                 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
 571                 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
 572                 ASN1_GEN_STR("T61", V_ASN1_T61STRING),
 573                 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
 574                 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
 575
 576                 /* Special cases */
 577                 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
 578                 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
 579                 ASN1_GEN_STR("SET", V_ASN1_SET),
 580                 /* type modifiers */
 581                 /* Explicit tag */
 582                 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
 583                 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
 584                 /* Implicit tag */
 585                 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
 586                 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
 587                 /* OCTET STRING wrapper */
 588                 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
 589                 /* SEQUENCE wrapper */
 590                 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
 591                 /* BIT STRING wrapper */
 592                 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
 593                 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
 594                 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
 595         };
 596
 597         if (len == -1)
 598                 len = strlen(tagstr);
 599
 600         tntmp = tnst;
 601         for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++)
 602                 {
 603                 if (!strncmp(tntmp->strnam, tagstr, tntmp->len))
 604                         return tntmp->tag;
 605                 }
 606
 607         return -1;
 608         }
 609
 610 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
 611         {
 612         ASN1_TYPE *atmp = NULL;
 613
 614         CONF_VALUE vtmp;
 615
 616         unsigned char *rdata;
 617         long rdlen;
 618
 619         int no_unused = 1;
 620
 621         if (!(atmp = ASN1_TYPE_new()))
 622                 {
 623                 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 624                 return NULL;
 625                 }
 626
 627         if (!str)
 628                 str = "";
 629
 630         switch(utype)
 631                 {
 632
 633                 case V_ASN1_NULL:
 634                 if (str && *str)
 635                         {
 636                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
 637                         goto bad_form;
 638                         }
 639                 break;
 640
 641                 case V_ASN1_BOOLEAN:
 642                 if (format != ASN1_GEN_FORMAT_ASCII)
 643                         {
 644                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
 645                         goto bad_form;
 646                         }
 647                 vtmp.value = (char *)str;
 648                 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean))
 649                         {
 650                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
 651                         goto bad_str;
 652                         }
 653                 break;
 654
 655                 case V_ASN1_INTEGER:
 656                 case V_ASN1_ENUMERATED:
 657                 if (format != ASN1_GEN_FORMAT_ASCII)
 658                         {
 659                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
 660                         goto bad_form;
 661                         }
 662                 if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str)))
 663                         {
 664                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
 665                         goto bad_str;
 666                         }
 667                 break;
 668
 669                 case V_ASN1_OBJECT:
 670                 if (format != ASN1_GEN_FORMAT_ASCII)
 671                         {
 672                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
 673                         goto bad_form;
 674                         }
 675                 if (!(atmp->value.object = OBJ_txt2obj(str, 0)))
 676                         {
 677                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
 678                         goto bad_str;
 679                         }
 680                 break;
 681
 682                 case V_ASN1_UTCTIME:
 683                 case V_ASN1_GENERALIZEDTIME:
 684                 if (format != ASN1_GEN_FORMAT_ASCII)
 685                         {
 686                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
 687                         goto bad_form;
 688                         }
 689                 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
 690                         {
 691                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 692                         goto bad_str;
 693                         }
 694                 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1))
 695                         {
 696                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 697                         goto bad_str;
 698                         }
 699                 atmp->value.asn1_string->type = utype;
 700                 if (!ASN1_TIME_check(atmp->value.asn1_string))
 701                         {
 702                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
 703                         goto bad_str;
 704                         }
 705
 706                 break;
 707
 708                 case V_ASN1_BMPSTRING:
 709                 case V_ASN1_PRINTABLESTRING:
 710                 case V_ASN1_IA5STRING:
 711                 case V_ASN1_T61STRING:
 712                 case V_ASN1_UTF8STRING:
 713                 case V_ASN1_VISIBLESTRING:
 714                 case V_ASN1_UNIVERSALSTRING:
 715
 716                 if (format == ASN1_GEN_FORMAT_ASCII)
 717                         format = MBSTRING_ASC;
 718                 else if (format == ASN1_GEN_FORMAT_UTF8)
 719                         format = MBSTRING_UTF8;
 720                 else
 721                         {
 722                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
 723                         goto bad_form;
 724                         }
 725
 726
 727                 if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
 728                                                 -1, format, ASN1_tag2bit(utype)) <= 0)
 729                         {
 730                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 731                         goto bad_str;
 732                         }
 733
 734
 735                 break;
 736
 737                 case V_ASN1_BIT_STRING:
 738
 739                 case V_ASN1_OCTET_STRING:
 740
 741                 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
 742                         {
 743                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 744                         goto bad_form;
 745                         }
 746
 747                 if (format == ASN1_GEN_FORMAT_HEX)
 748                         {
 749
 750                         if (!(rdata = string_to_hex((char *)str, &rdlen)))
 751                                 {
 752                                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
 753                                 goto bad_str;
 754                                 }
 755
 756                         atmp->value.asn1_string->data = rdata;
 757                         atmp->value.asn1_string->length = rdlen;
 758                         atmp->value.asn1_string->type = utype;
 759
 760                         }
 761                 else if (format == ASN1_GEN_FORMAT_ASCII)
 762                         ASN1_STRING_set(atmp->value.asn1_string, str, -1);
 763                 else if ((format == ASN1_GEN_FORMAT_BITLIST) && (utype == V_ASN1_BIT_STRING))
 764                         {
 765                         if (!CONF_parse_list(str, ',', 1, bitstr_cb, atmp->value.bit_string))
 766                                 {
 767                                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
 768                                 goto bad_str;
 769                                 }
 770                         no_unused = 0;
 771
 772                         }
 773                 else
 774                         {
 775                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
 776                         goto bad_form;
 777                         }
 778
 779                 if ((utype == V_ASN1_BIT_STRING) && no_unused)
 780                         {
 781                         atmp->value.asn1_string->flags
 782                                 &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 783                         atmp->value.asn1_string->flags
 784                                 |= ASN1_STRING_FLAG_BITS_LEFT;
 785                         }
 786
 787
 788                 break;
 789
 790                 default:
 791                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
 792                 goto bad_str;
 793                 break;
 794                 }
 795
 796
 797         atmp->type = utype;
 798         return atmp;
 799
 800
 801         bad_str:
 802         ERR_add_error_data(2, "string=", str);
 803         bad_form:
 804
 805         ASN1_TYPE_free(atmp);
 806         return NULL;
 807
 808         }
 809
 810 static int bitstr_cb(const char *elem, int len, void *bitstr)
 811         {
 812         long bitnum;
 813         char *eptr;
 814         if (!elem)
 815                 return 0;
 816         bitnum = strtoul(elem, &eptr, 10);
 817         if (eptr && *eptr && (eptr != elem + len))
 818                 return 0;
 819         if (bitnum < 0)
 820                 {
 821                 ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
 822                 return 0;
 823                 }
 824         if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1))
 825                 {
 826                 ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
 827                 return 0;
 828                 }
 829         return 1;
 830         }
 831