crypto/openssl/crypto/asn1/asn1_gen.c

   1 /* asn1_gen.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project 2002.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2002 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include "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         if (!new_der)
 231                 goto err;
 232
 233         /* Generate tagged encoding */
 234
 235         p = new_der;
 236
 237         /* Output explicit tags first */
 238
 239         for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count; i++, etmp++)
 240                 {
 241                 ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,
 242                                         etmp->exp_tag, etmp->exp_class);
 243                 if (etmp->exp_pad)
 244                         *p++ = 0;
 245                 }
 246
 247         /* If IMPLICIT, output tag */
 248
 249         if (asn1_tags.imp_tag != -1)
 250                 {
 251                 if (asn1_tags.imp_class == V_ASN1_UNIVERSAL
 252                     && (asn1_tags.imp_tag == V_ASN1_SEQUENCE
 253                      || asn1_tags.imp_tag == V_ASN1_SET) )
 254                         hdr_constructed = V_ASN1_CONSTRUCTED;
 255                 ASN1_put_object(&p, hdr_constructed, hdr_len,
 256                                         asn1_tags.imp_tag, asn1_tags.imp_class);
 257                 }
 258
 259         /* Copy across original encoding */
 260         memcpy(p, cpy_start, cpy_len);
 261
 262         cp = new_der;
 263
 264         /* Obtain new ASN1_TYPE structure */
 265         ret = d2i_ASN1_TYPE(NULL, &cp, len);
 266
 267         err:
 268         if (orig_der)
 269                 OPENSSL_free(orig_der);
 270         if (new_der)
 271                 OPENSSL_free(new_der);
 272
 273         return ret;
 274
 275         }
 276
 277 static int asn1_cb(const char *elem, int len, void *bitstr)
 278         {
 279         tag_exp_arg *arg = bitstr;
 280         int i;
 281         int utype;
 282         int vlen = 0;
 283         const char *p, *vstart = NULL;
 284
 285         int tmp_tag, tmp_class;
 286
 287         for(i = 0, p = elem; i < len; p++, i++)
 288                 {
 289                 /* Look for the ':' in name value pairs */
 290                 if (*p == ':')
 291                         {
 292                         vstart = p + 1;
 293                         vlen = len - (vstart - elem);
 294                         len = p - elem;
 295                         break;
 296                         }
 297                 }
 298
 299         utype = asn1_str2tag(elem, len);
 300
 301         if (utype == -1)
 302                 {
 303                 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG);
 304                 ERR_add_error_data(2, "tag=", elem);
 305                 return -1;
 306                 }
 307
 308         /* If this is not a modifier mark end of string and exit */
 309         if (!(utype & ASN1_GEN_FLAG))
 310                 {
 311                 arg->utype = utype;
 312                 arg->str = vstart;
 313                 /* If no value and not end of string, error */
 314                 if (!vstart && elem[len])
 315                         {
 316                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE);
 317                         return -1;
 318                         }
 319                 return 0;
 320                 }
 321
 322         switch(utype)
 323                 {
 324
 325                 case ASN1_GEN_FLAG_IMP:
 326                 /* Check for illegal multiple IMPLICIT tagging */
 327                 if (arg->imp_tag != -1)
 328                         {
 329                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING);
 330                         return -1;
 331                         }
 332                 if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
 333                         return -1;
 334                 break;
 335
 336                 case ASN1_GEN_FLAG_EXP:
 337
 338                 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
 339                         return -1;
 340                 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
 341                         return -1;
 342                 break;
 343
 344                 case ASN1_GEN_FLAG_SEQWRAP:
 345                 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
 346                         return -1;
 347                 break;
 348
 349                 case ASN1_GEN_FLAG_SETWRAP:
 350                 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
 351                         return -1;
 352                 break;
 353
 354                 case ASN1_GEN_FLAG_BITWRAP:
 355                 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
 356                         return -1;
 357                 break;
 358
 359                 case ASN1_GEN_FLAG_OCTWRAP:
 360                 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
 361                         return -1;
 362                 break;
 363
 364                 case ASN1_GEN_FLAG_FORMAT:
 365                 if (!strncmp(vstart, "ASCII", 5))
 366                         arg->format = ASN1_GEN_FORMAT_ASCII;
 367                 else if (!strncmp(vstart, "UTF8", 4))
 368                         arg->format = ASN1_GEN_FORMAT_UTF8;
 369                 else if (!strncmp(vstart, "HEX", 3))
 370                         arg->format = ASN1_GEN_FORMAT_HEX;
 371                 else if (!strncmp(vstart, "BITLIST", 3))
 372                         arg->format = ASN1_GEN_FORMAT_BITLIST;
 373                 else
 374                         {
 375                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT);
 376                         return -1;
 377                         }
 378                 break;
 379
 380                 }
 381
 382         return 1;
 383
 384         }
 385
 386 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
 387         {
 388         char erch[2];
 389         long tag_num;
 390         char *eptr;
 391         if (!vstart)
 392                 return 0;
 393         tag_num = strtoul(vstart, &eptr, 10);
 394         /* Check we haven't gone past max length: should be impossible */
 395         if (eptr && *eptr && (eptr > vstart + vlen))
 396                 return 0;
 397         if (tag_num < 0)
 398                 {
 399                 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER);
 400                 return 0;
 401                 }
 402         *ptag = tag_num;
 403         /* If we have non numeric characters, parse them */
 404         if (eptr)
 405                 vlen -= eptr - vstart;
 406         else
 407                 vlen = 0;
 408         if (vlen)
 409                 {
 410                 switch (*eptr)
 411                         {
 412
 413                         case 'U':
 414                         *pclass = V_ASN1_UNIVERSAL;
 415                         break;
 416
 417                         case 'A':
 418                         *pclass = V_ASN1_APPLICATION;
 419                         break;
 420
 421                         case 'P':
 422                         *pclass = V_ASN1_PRIVATE;
 423                         break;
 424
 425                         case 'C':
 426                         *pclass = V_ASN1_CONTEXT_SPECIFIC;
 427                         break;
 428
 429                         default:
 430                         erch[0] = *eptr;
 431                         erch[1] = 0;
 432                         ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER);
 433                         ERR_add_error_data(2, "Char=", erch);
 434                         return 0;
 435                         break;
 436
 437                         }
 438                 }
 439         else
 440                 *pclass = V_ASN1_CONTEXT_SPECIFIC;
 441
 442         return 1;
 443
 444         }
 445
 446 /* Handle multiple types: SET and SEQUENCE */
 447
 448 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
 449         {
 450         ASN1_TYPE *ret = NULL;
 451         STACK_OF(ASN1_TYPE) *sk = NULL;
 452         STACK_OF(CONF_VALUE) *sect = NULL;
 453         unsigned char *der = NULL;
 454         int derlen;
 455         int i;
 456         sk = sk_ASN1_TYPE_new_null();
 457         if (!sk)
 458                 goto bad;
 459         if (section)
 460                 {
 461                 if (!cnf)
 462                         goto bad;
 463                 sect = X509V3_get_section(cnf, (char *)section);
 464                 if (!sect)
 465                         goto bad;
 466                 for (i = 0; i < sk_CONF_VALUE_num(sect); i++)
 467                         {
 468                         ASN1_TYPE *typ = ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf);
 469                         if (!typ)
 470                                 goto bad;
 471                         if (!sk_ASN1_TYPE_push(sk, typ))
 472                                 goto bad;
 473                         }
 474                 }
 475
 476         /* Now we has a STACK of the components, convert to the correct form */
 477
 478         if (utype == V_ASN1_SET)
 479                 derlen = i2d_ASN1_SET_ANY(sk, &der);
 480         else
 481                 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);
 482
 483         if (derlen < 0)
 484                 goto bad;
 485
 486         if (!(ret = ASN1_TYPE_new()))
 487                 goto bad;
 488
 489         if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
 490                 goto bad;
 491
 492         ret->type = utype;
 493
 494         ret->value.asn1_string->data = der;
 495         ret->value.asn1_string->length = derlen;
 496
 497         der = NULL;
 498
 499         bad:
 500
 501         if (der)
 502                 OPENSSL_free(der);
 503
 504         if (sk)
 505                 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
 506         if (sect)
 507                 X509V3_section_free(cnf, sect);
 508
 509         return ret;
 510         }
 511
 512 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok)
 513         {
 514         tag_exp_type *exp_tmp;
 515         /* Can only have IMPLICIT if permitted */
 516         if ((arg->imp_tag != -1) && !imp_ok)
 517                 {
 518                 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);
 519                 return 0;
 520                 }
 521
 522         if (arg->exp_count == ASN1_FLAG_EXP_MAX)
 523                 {
 524                 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED);
 525                 return 0;
 526                 }
 527
 528         exp_tmp = &arg->exp_list[arg->exp_count++];
 529
 530         /* If IMPLICIT set tag to implicit value then
 531          * reset implicit tag since it has been used.
 532          */
 533         if (arg->imp_tag != -1)
 534                 {
 535                 exp_tmp->exp_tag = arg->imp_tag;
 536                 exp_tmp->exp_class = arg->imp_class;
 537                 arg->imp_tag = -1;
 538                 arg->imp_class = -1;
 539                 }
 540         else
 541                 {
 542                 exp_tmp->exp_tag = exp_tag;
 543                 exp_tmp->exp_class = exp_class;
 544                 }
 545         exp_tmp->exp_constructed = exp_constructed;
 546         exp_tmp->exp_pad = exp_pad;
 547
 548         return 1;
 549         }
 550
 551
 552 static int asn1_str2tag(const char *tagstr, int len)
 553         {
 554         unsigned int i;
 555         static const struct tag_name_st *tntmp, tnst [] = {
 556                 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
 557                 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
 558                 ASN1_GEN_STR("NULL", V_ASN1_NULL),
 559                 ASN1_GEN_STR("INT", V_ASN1_INTEGER),
 560                 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
 561                 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
 562                 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
 563                 ASN1_GEN_STR("OID", V_ASN1_OBJECT),
 564                 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
 565                 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
 566                 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
 567                 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
 568                 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
 569                 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
 570                 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
 571                 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
 572                 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
 573                 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
 574                 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
 575                 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
 576                 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
 577                 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
 578                 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
 579                 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
 580                 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
 581                 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
 582                 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
 583                 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
 584                 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
 585                 ASN1_GEN_STR("T61", V_ASN1_T61STRING),
 586                 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
 587                 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
 588                 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
 589                 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
 590                 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
 591                 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),
 592
 593                 /* Special cases */
 594                 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
 595                 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
 596                 ASN1_GEN_STR("SET", V_ASN1_SET),
 597                 /* type modifiers */
 598                 /* Explicit tag */
 599                 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
 600                 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
 601                 /* Implicit tag */
 602                 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
 603                 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
 604                 /* OCTET STRING wrapper */
 605                 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
 606                 /* SEQUENCE wrapper */
 607                 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
 608                 /* SET wrapper */
 609                 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
 610                 /* BIT STRING wrapper */
 611                 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
 612                 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
 613                 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
 614         };
 615
 616         if (len == -1)
 617                 len = strlen(tagstr);
 618
 619         tntmp = tnst;
 620         for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++)
 621                 {
 622                 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
 623                         return tntmp->tag;
 624                 }
 625
 626         return -1;
 627         }
 628
 629 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
 630         {
 631         ASN1_TYPE *atmp = NULL;
 632
 633         CONF_VALUE vtmp;
 634
 635         unsigned char *rdata;
 636         long rdlen;
 637
 638         int no_unused = 1;
 639
 640         if (!(atmp = ASN1_TYPE_new()))
 641                 {
 642                 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 643                 return NULL;
 644                 }
 645
 646         if (!str)
 647                 str = "";
 648
 649         switch(utype)
 650                 {
 651
 652                 case V_ASN1_NULL:
 653                 if (str && *str)
 654                         {
 655                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
 656                         goto bad_form;
 657                         }
 658                 break;
 659
 660                 case V_ASN1_BOOLEAN:
 661                 if (format != ASN1_GEN_FORMAT_ASCII)
 662                         {
 663                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
 664                         goto bad_form;
 665                         }
 666                 vtmp.name = NULL;
 667                 vtmp.section = NULL;
 668                 vtmp.value = (char *)str;
 669                 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean))
 670                         {
 671                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
 672                         goto bad_str;
 673                         }
 674                 break;
 675
 676                 case V_ASN1_INTEGER:
 677                 case V_ASN1_ENUMERATED:
 678                 if (format != ASN1_GEN_FORMAT_ASCII)
 679                         {
 680                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
 681                         goto bad_form;
 682                         }
 683                 if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str)))
 684                         {
 685                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
 686                         goto bad_str;
 687                         }
 688                 break;
 689
 690                 case V_ASN1_OBJECT:
 691                 if (format != ASN1_GEN_FORMAT_ASCII)
 692                         {
 693                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
 694                         goto bad_form;
 695                         }
 696                 if (!(atmp->value.object = OBJ_txt2obj(str, 0)))
 697                         {
 698                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
 699                         goto bad_str;
 700                         }
 701                 break;
 702
 703                 case V_ASN1_UTCTIME:
 704                 case V_ASN1_GENERALIZEDTIME:
 705                 if (format != ASN1_GEN_FORMAT_ASCII)
 706                         {
 707                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
 708                         goto bad_form;
 709                         }
 710                 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
 711                         {
 712                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 713                         goto bad_str;
 714                         }
 715                 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1))
 716                         {
 717                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 718                         goto bad_str;
 719                         }
 720                 atmp->value.asn1_string->type = utype;
 721                 if (!ASN1_TIME_check(atmp->value.asn1_string))
 722                         {
 723                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
 724                         goto bad_str;
 725                         }
 726
 727                 break;
 728
 729                 case V_ASN1_BMPSTRING:
 730                 case V_ASN1_PRINTABLESTRING:
 731                 case V_ASN1_IA5STRING:
 732                 case V_ASN1_T61STRING:
 733                 case V_ASN1_UTF8STRING:
 734                 case V_ASN1_VISIBLESTRING:
 735                 case V_ASN1_UNIVERSALSTRING:
 736                 case V_ASN1_GENERALSTRING:
 737                 case V_ASN1_NUMERICSTRING:
 738
 739                 if (format == ASN1_GEN_FORMAT_ASCII)
 740                         format = MBSTRING_ASC;
 741                 else if (format == ASN1_GEN_FORMAT_UTF8)
 742                         format = MBSTRING_UTF8;
 743                 else
 744                         {
 745                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
 746                         goto bad_form;
 747                         }
 748
 749
 750                 if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
 751                                                 -1, format, ASN1_tag2bit(utype)) <= 0)
 752                         {
 753                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 754                         goto bad_str;
 755                         }
 756
 757
 758                 break;
 759
 760                 case V_ASN1_BIT_STRING:
 761
 762                 case V_ASN1_OCTET_STRING:
 763
 764                 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
 765                         {
 766                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 767                         goto bad_form;
 768                         }
 769
 770                 if (format == ASN1_GEN_FORMAT_HEX)
 771                         {
 772
 773                         if (!(rdata = string_to_hex((char *)str, &rdlen)))
 774                                 {
 775                                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
 776                                 goto bad_str;
 777                                 }
 778
 779                         atmp->value.asn1_string->data = rdata;
 780                         atmp->value.asn1_string->length = rdlen;
 781                         atmp->value.asn1_string->type = utype;
 782
 783                         }
 784                 else if (format == ASN1_GEN_FORMAT_ASCII)
 785                         ASN1_STRING_set(atmp->value.asn1_string, str, -1);
 786                 else if ((format == ASN1_GEN_FORMAT_BITLIST) && (utype == V_ASN1_BIT_STRING))
 787                         {
 788                         if (!CONF_parse_list(str, ',', 1, bitstr_cb, atmp->value.bit_string))
 789                                 {
 790                                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
 791                                 goto bad_str;
 792                                 }
 793                         no_unused = 0;
 794
 795                         }
 796                 else
 797                         {
 798                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
 799                         goto bad_form;
 800                         }
 801
 802                 if ((utype == V_ASN1_BIT_STRING) && no_unused)
 803                         {
 804                         atmp->value.asn1_string->flags
 805                                 &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 806                         atmp->value.asn1_string->flags
 807                                 |= ASN1_STRING_FLAG_BITS_LEFT;
 808                         }
 809
 810
 811                 break;
 812
 813                 default:
 814                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
 815                 goto bad_str;
 816                 break;
 817                 }
 818
 819
 820         atmp->type = utype;
 821         return atmp;
 822
 823
 824         bad_str:
 825         ERR_add_error_data(2, "string=", str);
 826         bad_form:
 827
 828         ASN1_TYPE_free(atmp);
 829         return NULL;
 830
 831         }
 832
 833 static int bitstr_cb(const char *elem, int len, void *bitstr)
 834         {
 835         long bitnum;
 836         char *eptr;
 837         if (!elem)
 838                 return 0;
 839         bitnum = strtoul(elem, &eptr, 10);
 840         if (eptr && *eptr && (eptr != elem + len))
 841                 return 0;
 842         if (bitnum < 0)
 843                 {
 844                 ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
 845                 return 0;
 846                 }
 847         if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1))
 848                 {
 849                 ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
 850                 return 0;
 851                 }
 852         return 1;
 853         }
 854