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
 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                 {
 249                 if (asn1_tags.imp_class == V_ASN1_UNIVERSAL
 250                     && (asn1_tags.imp_tag == V_ASN1_SEQUENCE
 251                      || asn1_tags.imp_tag == V_ASN1_SET) )
 252                         hdr_constructed = V_ASN1_CONSTRUCTED;
 253                 ASN1_put_object(&p, hdr_constructed, hdr_len,
 254                                         asn1_tags.imp_tag, asn1_tags.imp_class);
 255                 }
 256
 257         /* Copy across original encoding */
 258         memcpy(p, cpy_start, cpy_len);
 259
 260         cp = new_der;
 261
 262         /* Obtain new ASN1_TYPE structure */
 263         ret = d2i_ASN1_TYPE(NULL, &cp, len);
 264
 265         err:
 266         if (orig_der)
 267                 OPENSSL_free(orig_der);
 268         if (new_der)
 269                 OPENSSL_free(new_der);
 270
 271         return ret;
 272
 273         }
 274
 275 static int asn1_cb(const char *elem, int len, void *bitstr)
 276         {
 277         tag_exp_arg *arg = bitstr;
 278         int i;
 279         int utype;
 280         int vlen = 0;
 281         const char *p, *vstart = NULL;
 282
 283         int tmp_tag, tmp_class;
 284
 285         for(i = 0, p = elem; i < len; p++, i++)
 286                 {
 287                 /* Look for the ':' in name value pairs */
 288                 if (*p == ':')
 289                         {
 290                         vstart = p + 1;
 291                         vlen = len - (vstart - elem);
 292                         len = p - elem;
 293                         break;
 294                         }
 295                 }
 296
 297         utype = asn1_str2tag(elem, len);
 298
 299         if (utype == -1)
 300                 {
 301                 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG);
 302                 ERR_add_error_data(2, "tag=", elem);
 303                 return -1;
 304                 }
 305
 306         /* If this is not a modifier mark end of string and exit */
 307         if (!(utype & ASN1_GEN_FLAG))
 308                 {
 309                 arg->utype = utype;
 310                 arg->str = vstart;
 311                 /* If no value and not end of string, error */
 312                 if (!vstart && elem[len])
 313                         {
 314                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE);
 315                         return -1;
 316                         }
 317                 return 0;
 318                 }
 319
 320         switch(utype)
 321                 {
 322
 323                 case ASN1_GEN_FLAG_IMP:
 324                 /* Check for illegal multiple IMPLICIT tagging */
 325                 if (arg->imp_tag != -1)
 326                         {
 327                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING);
 328                         return -1;
 329                         }
 330                 if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
 331                         return -1;
 332                 break;
 333
 334                 case ASN1_GEN_FLAG_EXP:
 335
 336                 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
 337                         return -1;
 338                 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
 339                         return -1;
 340                 break;
 341
 342                 case ASN1_GEN_FLAG_SEQWRAP:
 343                 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
 344                         return -1;
 345                 break;
 346
 347                 case ASN1_GEN_FLAG_SETWRAP:
 348                 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
 349                         return -1;
 350                 break;
 351
 352                 case ASN1_GEN_FLAG_BITWRAP:
 353                 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
 354                         return -1;
 355                 break;
 356
 357                 case ASN1_GEN_FLAG_OCTWRAP:
 358                 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
 359                         return -1;
 360                 break;
 361
 362                 case ASN1_GEN_FLAG_FORMAT:
 363                 if (!strncmp(vstart, "ASCII", 5))
 364                         arg->format = ASN1_GEN_FORMAT_ASCII;
 365                 else if (!strncmp(vstart, "UTF8", 4))
 366                         arg->format = ASN1_GEN_FORMAT_UTF8;
 367                 else if (!strncmp(vstart, "HEX", 3))
 368                         arg->format = ASN1_GEN_FORMAT_HEX;
 369                 else if (!strncmp(vstart, "BITLIST", 3))
 370                         arg->format = ASN1_GEN_FORMAT_BITLIST;
 371                 else
 372                         {
 373                         ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT);
 374                         return -1;
 375                         }
 376                 break;
 377
 378                 }
 379
 380         return 1;
 381
 382         }
 383
 384 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
 385         {
 386         char erch[2];
 387         long tag_num;
 388         char *eptr;
 389         if (!vstart)
 390                 return 0;
 391         tag_num = strtoul(vstart, &eptr, 10);
 392         /* Check we haven't gone past max length: should be impossible */
 393         if (eptr && *eptr && (eptr > vstart + vlen))
 394                 return 0;
 395         if (tag_num < 0)
 396                 {
 397                 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER);
 398                 return 0;
 399                 }
 400         *ptag = tag_num;
 401         /* If we have non numeric characters, parse them */
 402         if (eptr)
 403                 vlen -= eptr - vstart;
 404         else
 405                 vlen = 0;
 406         if (vlen)
 407                 {
 408                 switch (*eptr)
 409                         {
 410
 411                         case 'U':
 412                         *pclass = V_ASN1_UNIVERSAL;
 413                         break;
 414
 415                         case 'A':
 416                         *pclass = V_ASN1_APPLICATION;
 417                         break;
 418
 419                         case 'P':
 420                         *pclass = V_ASN1_PRIVATE;
 421                         break;
 422
 423                         case 'C':
 424                         *pclass = V_ASN1_CONTEXT_SPECIFIC;
 425                         break;
 426
 427                         default:
 428                         erch[0] = *eptr;
 429                         erch[1] = 0;
 430                         ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER);
 431                         ERR_add_error_data(2, "Char=", erch);
 432                         return 0;
 433                         break;
 434
 435                         }
 436                 }
 437         else
 438                 *pclass = V_ASN1_CONTEXT_SPECIFIC;
 439
 440         return 1;
 441
 442         }
 443
 444 /* Handle multiple types: SET and SEQUENCE */
 445
 446 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf)
 447         {
 448         ASN1_TYPE *ret = NULL;
 449         STACK_OF(ASN1_TYPE) *sk = NULL;
 450         STACK_OF(CONF_VALUE) *sect = NULL;
 451         unsigned char *der = NULL;
 452         int derlen;
 453         int i;
 454         sk = sk_ASN1_TYPE_new_null();
 455         if (section)
 456                 {
 457                 if (!cnf)
 458                         goto bad;
 459                 sect = X509V3_get_section(cnf, (char *)section);
 460                 if (!sect)
 461                         goto bad;
 462                 for (i = 0; i < sk_CONF_VALUE_num(sect); i++)
 463                         {
 464                         ASN1_TYPE *typ = ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf);
 465                         if (!typ)
 466                                 goto bad;
 467                         sk_ASN1_TYPE_push(sk, typ);
 468                         }
 469                 }
 470
 471         /* Now we has a STACK of the components, convert to the correct form */
 472
 473         if (utype == V_ASN1_SET)
 474                 derlen = i2d_ASN1_SET_ANY(sk, &der);
 475         else
 476                 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);
 477
 478         if (!(ret = ASN1_TYPE_new()))
 479                 goto bad;
 480
 481         if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype)))
 482                 goto bad;
 483
 484         ret->type = utype;
 485
 486         ret->value.asn1_string->data = der;
 487         ret->value.asn1_string->length = derlen;
 488
 489         der = NULL;
 490
 491         bad:
 492
 493         if (der)
 494                 OPENSSL_free(der);
 495
 496         if (sk)
 497                 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
 498         if (sect)
 499                 X509V3_section_free(cnf, sect);
 500
 501         return ret;
 502         }
 503
 504 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok)
 505         {
 506         tag_exp_type *exp_tmp;
 507         /* Can only have IMPLICIT if permitted */
 508         if ((arg->imp_tag != -1) && !imp_ok)
 509                 {
 510                 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);
 511                 return 0;
 512                 }
 513
 514         if (arg->exp_count == ASN1_FLAG_EXP_MAX)
 515                 {
 516                 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED);
 517                 return 0;
 518                 }
 519
 520         exp_tmp = &arg->exp_list[arg->exp_count++];
 521
 522         /* If IMPLICIT set tag to implicit value then
 523          * reset implicit tag since it has been used.
 524          */
 525         if (arg->imp_tag != -1)
 526                 {
 527                 exp_tmp->exp_tag = arg->imp_tag;
 528                 exp_tmp->exp_class = arg->imp_class;
 529                 arg->imp_tag = -1;
 530                 arg->imp_class = -1;
 531                 }
 532         else
 533                 {
 534                 exp_tmp->exp_tag = exp_tag;
 535                 exp_tmp->exp_class = exp_class;
 536                 }
 537         exp_tmp->exp_constructed = exp_constructed;
 538         exp_tmp->exp_pad = exp_pad;
 539
 540         return 1;
 541         }
 542
 543
 544 static int asn1_str2tag(const char *tagstr, int len)
 545         {
 546         unsigned int i;
 547         static const struct tag_name_st *tntmp, tnst [] = {
 548                 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
 549                 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
 550                 ASN1_GEN_STR("NULL", V_ASN1_NULL),
 551                 ASN1_GEN_STR("INT", V_ASN1_INTEGER),
 552                 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
 553                 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
 554                 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
 555                 ASN1_GEN_STR("OID", V_ASN1_OBJECT),
 556                 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
 557                 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
 558                 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
 559                 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
 560                 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
 561                 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
 562                 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
 563                 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
 564                 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
 565                 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
 566                 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
 567                 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
 568                 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
 569                 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
 570                 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
 571                 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
 572                 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
 573                 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
 574                 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
 575                 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
 576                 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
 577                 ASN1_GEN_STR("T61", V_ASN1_T61STRING),
 578                 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
 579                 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
 580                 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
 581                 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
 582                 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
 583                 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),
 584
 585                 /* Special cases */
 586                 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
 587                 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
 588                 ASN1_GEN_STR("SET", V_ASN1_SET),
 589                 /* type modifiers */
 590                 /* Explicit tag */
 591                 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
 592                 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
 593                 /* Implicit tag */
 594                 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
 595                 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
 596                 /* OCTET STRING wrapper */
 597                 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
 598                 /* SEQUENCE wrapper */
 599                 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
 600                 /* SET wrapper */
 601                 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
 602                 /* BIT STRING wrapper */
 603                 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
 604                 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
 605                 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
 606         };
 607
 608         if (len == -1)
 609                 len = strlen(tagstr);
 610
 611         tntmp = tnst;
 612         for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++)
 613                 {
 614                 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len))
 615                         return tntmp->tag;
 616                 }
 617
 618         return -1;
 619         }
 620
 621 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
 622         {
 623         ASN1_TYPE *atmp = NULL;
 624
 625         CONF_VALUE vtmp;
 626
 627         unsigned char *rdata;
 628         long rdlen;
 629
 630         int no_unused = 1;
 631
 632         if (!(atmp = ASN1_TYPE_new()))
 633                 {
 634                 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 635                 return NULL;
 636                 }
 637
 638         if (!str)
 639                 str = "";
 640
 641         switch(utype)
 642                 {
 643
 644                 case V_ASN1_NULL:
 645                 if (str && *str)
 646                         {
 647                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE);
 648                         goto bad_form;
 649                         }
 650                 break;
 651
 652                 case V_ASN1_BOOLEAN:
 653                 if (format != ASN1_GEN_FORMAT_ASCII)
 654                         {
 655                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
 656                         goto bad_form;
 657                         }
 658                 vtmp.name = NULL;
 659                 vtmp.section = NULL;
 660                 vtmp.value = (char *)str;
 661                 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean))
 662                         {
 663                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
 664                         goto bad_str;
 665                         }
 666                 break;
 667
 668                 case V_ASN1_INTEGER:
 669                 case V_ASN1_ENUMERATED:
 670                 if (format != ASN1_GEN_FORMAT_ASCII)
 671                         {
 672                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
 673                         goto bad_form;
 674                         }
 675                 if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str)))
 676                         {
 677                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
 678                         goto bad_str;
 679                         }
 680                 break;
 681
 682                 case V_ASN1_OBJECT:
 683                 if (format != ASN1_GEN_FORMAT_ASCII)
 684                         {
 685                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
 686                         goto bad_form;
 687                         }
 688                 if (!(atmp->value.object = OBJ_txt2obj(str, 0)))
 689                         {
 690                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
 691                         goto bad_str;
 692                         }
 693                 break;
 694
 695                 case V_ASN1_UTCTIME:
 696                 case V_ASN1_GENERALIZEDTIME:
 697                 if (format != ASN1_GEN_FORMAT_ASCII)
 698                         {
 699                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
 700                         goto bad_form;
 701                         }
 702                 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
 703                         {
 704                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 705                         goto bad_str;
 706                         }
 707                 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1))
 708                         {
 709                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 710                         goto bad_str;
 711                         }
 712                 atmp->value.asn1_string->type = utype;
 713                 if (!ASN1_TIME_check(atmp->value.asn1_string))
 714                         {
 715                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
 716                         goto bad_str;
 717                         }
 718
 719                 break;
 720
 721                 case V_ASN1_BMPSTRING:
 722                 case V_ASN1_PRINTABLESTRING:
 723                 case V_ASN1_IA5STRING:
 724                 case V_ASN1_T61STRING:
 725                 case V_ASN1_UTF8STRING:
 726                 case V_ASN1_VISIBLESTRING:
 727                 case V_ASN1_UNIVERSALSTRING:
 728                 case V_ASN1_GENERALSTRING:
 729                 case V_ASN1_NUMERICSTRING:
 730
 731                 if (format == ASN1_GEN_FORMAT_ASCII)
 732                         format = MBSTRING_ASC;
 733                 else if (format == ASN1_GEN_FORMAT_UTF8)
 734                         format = MBSTRING_UTF8;
 735                 else
 736                         {
 737                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
 738                         goto bad_form;
 739                         }
 740
 741
 742                 if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
 743                                                 -1, format, ASN1_tag2bit(utype)) <= 0)
 744                         {
 745                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 746                         goto bad_str;
 747                         }
 748
 749
 750                 break;
 751
 752                 case V_ASN1_BIT_STRING:
 753
 754                 case V_ASN1_OCTET_STRING:
 755
 756                 if (!(atmp->value.asn1_string = ASN1_STRING_new()))
 757                         {
 758                         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 759                         goto bad_form;
 760                         }
 761
 762                 if (format == ASN1_GEN_FORMAT_HEX)
 763                         {
 764
 765                         if (!(rdata = string_to_hex((char *)str, &rdlen)))
 766                                 {
 767                                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
 768                                 goto bad_str;
 769                                 }
 770
 771                         atmp->value.asn1_string->data = rdata;
 772                         atmp->value.asn1_string->length = rdlen;
 773                         atmp->value.asn1_string->type = utype;
 774
 775                         }
 776                 else if (format == ASN1_GEN_FORMAT_ASCII)
 777                         ASN1_STRING_set(atmp->value.asn1_string, str, -1);
 778                 else if ((format == ASN1_GEN_FORMAT_BITLIST) && (utype == V_ASN1_BIT_STRING))
 779                         {
 780                         if (!CONF_parse_list(str, ',', 1, bitstr_cb, atmp->value.bit_string))
 781                                 {
 782                                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
 783                                 goto bad_str;
 784                                 }
 785                         no_unused = 0;
 786
 787                         }
 788                 else
 789                         {
 790                         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
 791                         goto bad_form;
 792                         }
 793
 794                 if ((utype == V_ASN1_BIT_STRING) && no_unused)
 795                         {
 796                         atmp->value.asn1_string->flags
 797                                 &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 798                         atmp->value.asn1_string->flags
 799                                 |= ASN1_STRING_FLAG_BITS_LEFT;
 800                         }
 801
 802
 803                 break;
 804
 805                 default:
 806                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
 807                 goto bad_str;
 808                 break;
 809                 }
 810
 811
 812         atmp->type = utype;
 813         return atmp;
 814
 815
 816         bad_str:
 817         ERR_add_error_data(2, "string=", str);
 818         bad_form:
 819
 820         ASN1_TYPE_free(atmp);
 821         return NULL;
 822
 823         }
 824
 825 static int bitstr_cb(const char *elem, int len, void *bitstr)
 826         {
 827         long bitnum;
 828         char *eptr;
 829         if (!elem)
 830                 return 0;
 831         bitnum = strtoul(elem, &eptr, 10);
 832         if (eptr && *eptr && (eptr != elem + len))
 833                 return 0;
 834         if (bitnum < 0)
 835                 {
 836                 ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
 837                 return 0;
 838                 }
 839         if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1))
 840                 {
 841                 ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
 842                 return 0;
 843                 }
 844         return 1;
 845         }
 846