crypto/asn1/asn1_gen.c

   1 /*
   2  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   3  * 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 "internal/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 /* Maximum number of nested sequences */
  77 #define ASN1_GEN_SEQ_MAX_DEPTH  50
  78
  79 /* Input formats */
  80
  81 /* ASCII: default */
  82 #define ASN1_GEN_FORMAT_ASCII   1
  83 /* UTF8 */
  84 #define ASN1_GEN_FORMAT_UTF8    2
  85 /* Hex */
  86 #define ASN1_GEN_FORMAT_HEX     3
  87 /* List of bits */
  88 #define ASN1_GEN_FORMAT_BITLIST 4
  89
  90 struct tag_name_st {
  91     const char *strnam;
  92     int len;
  93     int tag;
  94 };
  95
  96 typedef struct {
  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     int imp_tag;
 106     int imp_class;
 107     int utype;
 108     int format;
 109     const char *str;
 110     tag_exp_type exp_list[ASN1_FLAG_EXP_MAX];
 111     int exp_count;
 112 } tag_exp_arg;
 113
 114 static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth,
 115                               int *perr);
 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,
 119                       int exp_constructed, int exp_pad, int imp_ok);
 120 static int parse_tagging(const char *vstart, int vlen, int *ptag,
 121                          int *pclass);
 122 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf,
 123                              int depth, int *perr);
 124 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype);
 125 static int asn1_str2tag(const char *tagstr, int len);
 126
 127 ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf)
 128 {
 129     X509V3_CTX cnf;
 130
 131     if (!nconf)
 132         return ASN1_generate_v3(str, NULL);
 133
 134     X509V3_set_nconf(&cnf, nconf);
 135     return ASN1_generate_v3(str, &cnf);
 136 }
 137
 138 ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf)
 139 {
 140     int err = 0;
 141     ASN1_TYPE *ret = generate_v3(str, cnf, 0, &err);
 142     if (err)
 143         ASN1err(ASN1_F_ASN1_GENERATE_V3, err);
 144     return ret;
 145 }
 146
 147 static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth,
 148                               int *perr)
 149 {
 150     ASN1_TYPE *ret;
 151     tag_exp_arg asn1_tags;
 152     tag_exp_type *etmp;
 153
 154     int i, len;
 155
 156     unsigned char *orig_der = NULL, *new_der = NULL;
 157     const unsigned char *cpy_start;
 158     unsigned char *p;
 159     const unsigned char *cp;
 160     int cpy_len;
 161     long hdr_len = 0;
 162     int hdr_constructed = 0, hdr_tag, hdr_class;
 163     int r;
 164
 165     asn1_tags.imp_tag = -1;
 166     asn1_tags.imp_class = -1;
 167     asn1_tags.format = ASN1_GEN_FORMAT_ASCII;
 168     asn1_tags.exp_count = 0;
 169     if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0) {
 170         *perr = ASN1_R_UNKNOWN_TAG;
 171         return NULL;
 172     }
 173
 174     if ((asn1_tags.utype == V_ASN1_SEQUENCE)
 175         || (asn1_tags.utype == V_ASN1_SET)) {
 176         if (!cnf) {
 177             *perr = ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG;
 178             return NULL;
 179         }
 180         if (depth >= ASN1_GEN_SEQ_MAX_DEPTH) {
 181             *perr = ASN1_R_ILLEGAL_NESTED_TAGGING;
 182             return NULL;
 183         }
 184         ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf, depth, perr);
 185     } else
 186         ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype);
 187
 188     if (!ret)
 189         return NULL;
 190
 191     /* If no tagging return base type */
 192     if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0))
 193         return ret;
 194
 195     /* Generate the encoding */
 196     cpy_len = i2d_ASN1_TYPE(ret, &orig_der);
 197     ASN1_TYPE_free(ret);
 198     ret = NULL;
 199     /* Set point to start copying for modified encoding */
 200     cpy_start = orig_der;
 201
 202     /* Do we need IMPLICIT tagging? */
 203     if (asn1_tags.imp_tag != -1) {
 204         /* If IMPLICIT we will replace the underlying tag */
 205         /* Skip existing tag+len */
 206         r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class,
 207                             cpy_len);
 208         if (r & 0x80)
 209             goto err;
 210         /* Update copy length */
 211         cpy_len -= cpy_start - orig_der;
 212         /*
 213          * For IMPLICIT tagging the length should match the original length
 214          * and constructed flag should be consistent.
 215          */
 216         if (r & 0x1) {
 217             /* Indefinite length constructed */
 218             hdr_constructed = 2;
 219             hdr_len = 0;
 220         } else
 221             /* Just retain constructed flag */
 222             hdr_constructed = r & V_ASN1_CONSTRUCTED;
 223         /*
 224          * Work out new length with IMPLICIT tag: ignore constructed because
 225          * it will mess up if indefinite length
 226          */
 227         len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag);
 228     } else
 229         len = cpy_len;
 230
 231     /* Work out length in any EXPLICIT, starting from end */
 232
 233     for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1;
 234          i < asn1_tags.exp_count; i++, etmp--) {
 235         /* Content length: number of content octets + any padding */
 236         len += etmp->exp_pad;
 237         etmp->exp_len = len;
 238         /* Total object length: length including new header */
 239         len = ASN1_object_size(0, len, etmp->exp_tag);
 240     }
 241
 242     /* Allocate buffer for new encoding */
 243
 244     new_der = OPENSSL_malloc(len);
 245     if (new_der == NULL)
 246         goto err;
 247
 248     /* Generate tagged encoding */
 249
 250     p = new_der;
 251
 252     /* Output explicit tags first */
 253
 254     for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count;
 255          i++, etmp++) {
 256         ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len,
 257                         etmp->exp_tag, etmp->exp_class);
 258         if (etmp->exp_pad)
 259             *p++ = 0;
 260     }
 261
 262     /* If IMPLICIT, output tag */
 263
 264     if (asn1_tags.imp_tag != -1) {
 265         if (asn1_tags.imp_class == V_ASN1_UNIVERSAL
 266             && (asn1_tags.imp_tag == V_ASN1_SEQUENCE
 267                 || asn1_tags.imp_tag == V_ASN1_SET))
 268             hdr_constructed = V_ASN1_CONSTRUCTED;
 269         ASN1_put_object(&p, hdr_constructed, hdr_len,
 270                         asn1_tags.imp_tag, asn1_tags.imp_class);
 271     }
 272
 273     /* Copy across original encoding */
 274     memcpy(p, cpy_start, cpy_len);
 275
 276     cp = new_der;
 277
 278     /* Obtain new ASN1_TYPE structure */
 279     ret = d2i_ASN1_TYPE(NULL, &cp, len);
 280
 281  err:
 282     OPENSSL_free(orig_der);
 283     OPENSSL_free(new_der);
 284
 285     return ret;
 286
 287 }
 288
 289 static int asn1_cb(const char *elem, int len, void *bitstr)
 290 {
 291     tag_exp_arg *arg = bitstr;
 292     int i;
 293     int utype;
 294     int vlen = 0;
 295     const char *p, *vstart = NULL;
 296
 297     int tmp_tag, tmp_class;
 298
 299     if (elem == NULL)
 300         return -1;
 301
 302     for (i = 0, p = elem; i < len; p++, i++) {
 303         /* Look for the ':' in name value pairs */
 304         if (*p == ':') {
 305             vstart = p + 1;
 306             vlen = len - (vstart - elem);
 307             len = p - elem;
 308             break;
 309         }
 310     }
 311
 312     utype = asn1_str2tag(elem, len);
 313
 314     if (utype == -1) {
 315         ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG);
 316         ERR_add_error_data(2, "tag=", elem);
 317         return -1;
 318     }
 319
 320     /* If this is not a modifier mark end of string and exit */
 321     if (!(utype & ASN1_GEN_FLAG)) {
 322         arg->utype = utype;
 323         arg->str = vstart;
 324         /* If no value and not end of string, error */
 325         if (!vstart && elem[len]) {
 326             ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE);
 327             return -1;
 328         }
 329         return 0;
 330     }
 331
 332     switch (utype) {
 333
 334     case ASN1_GEN_FLAG_IMP:
 335         /* Check for illegal multiple IMPLICIT tagging */
 336         if (arg->imp_tag != -1) {
 337             ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING);
 338             return -1;
 339         }
 340         if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class))
 341             return -1;
 342         break;
 343
 344     case ASN1_GEN_FLAG_EXP:
 345
 346         if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class))
 347             return -1;
 348         if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0))
 349             return -1;
 350         break;
 351
 352     case ASN1_GEN_FLAG_SEQWRAP:
 353         if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1))
 354             return -1;
 355         break;
 356
 357     case ASN1_GEN_FLAG_SETWRAP:
 358         if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1))
 359             return -1;
 360         break;
 361
 362     case ASN1_GEN_FLAG_BITWRAP:
 363         if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1))
 364             return -1;
 365         break;
 366
 367     case ASN1_GEN_FLAG_OCTWRAP:
 368         if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1))
 369             return -1;
 370         break;
 371
 372     case ASN1_GEN_FLAG_FORMAT:
 373         if (!vstart) {
 374             ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_FORMAT);
 375             return -1;
 376         }
 377         if (strncmp(vstart, "ASCII", 5) == 0)
 378             arg->format = ASN1_GEN_FORMAT_ASCII;
 379         else if (strncmp(vstart, "UTF8", 4) == 0)
 380             arg->format = ASN1_GEN_FORMAT_UTF8;
 381         else if (strncmp(vstart, "HEX", 3) == 0)
 382             arg->format = ASN1_GEN_FORMAT_HEX;
 383         else if (strncmp(vstart, "BITLIST", 7) == 0)
 384             arg->format = ASN1_GEN_FORMAT_BITLIST;
 385         else {
 386             ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_FORMAT);
 387             return -1;
 388         }
 389         break;
 390
 391     }
 392
 393     return 1;
 394
 395 }
 396
 397 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass)
 398 {
 399     char erch[2];
 400     long tag_num;
 401     char *eptr;
 402     if (!vstart)
 403         return 0;
 404     tag_num = strtoul(vstart, &eptr, 10);
 405     /* Check we haven't gone past max length: should be impossible */
 406     if (eptr && *eptr && (eptr > vstart + vlen))
 407         return 0;
 408     if (tag_num < 0) {
 409         ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER);
 410         return 0;
 411     }
 412     *ptag = tag_num;
 413     /* If we have non numeric characters, parse them */
 414     if (eptr)
 415         vlen -= eptr - vstart;
 416     else
 417         vlen = 0;
 418     if (vlen) {
 419         switch (*eptr) {
 420
 421         case 'U':
 422             *pclass = V_ASN1_UNIVERSAL;
 423             break;
 424
 425         case 'A':
 426             *pclass = V_ASN1_APPLICATION;
 427             break;
 428
 429         case 'P':
 430             *pclass = V_ASN1_PRIVATE;
 431             break;
 432
 433         case 'C':
 434             *pclass = V_ASN1_CONTEXT_SPECIFIC;
 435             break;
 436
 437         default:
 438             erch[0] = *eptr;
 439             erch[1] = 0;
 440             ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER);
 441             ERR_add_error_data(2, "Char=", erch);
 442             return 0;
 443
 444         }
 445     } else
 446         *pclass = V_ASN1_CONTEXT_SPECIFIC;
 447
 448     return 1;
 449
 450 }
 451
 452 /* Handle multiple types: SET and SEQUENCE */
 453
 454 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf,
 455                              int depth, int *perr)
 456 {
 457     ASN1_TYPE *ret = NULL;
 458     STACK_OF(ASN1_TYPE) *sk = NULL;
 459     STACK_OF(CONF_VALUE) *sect = NULL;
 460     unsigned char *der = NULL;
 461     int derlen;
 462     int i;
 463     sk = sk_ASN1_TYPE_new_null();
 464     if (!sk)
 465         goto bad;
 466     if (section) {
 467         if (!cnf)
 468             goto bad;
 469         sect = X509V3_get_section(cnf, (char *)section);
 470         if (!sect)
 471             goto bad;
 472         for (i = 0; i < sk_CONF_VALUE_num(sect); i++) {
 473             ASN1_TYPE *typ =
 474                 generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf,
 475                             depth + 1, perr);
 476             if (!typ)
 477                 goto bad;
 478             if (!sk_ASN1_TYPE_push(sk, typ))
 479                 goto bad;
 480         }
 481     }
 482
 483     /*
 484      * Now we has a STACK of the components, convert to the correct form
 485      */
 486
 487     if (utype == V_ASN1_SET)
 488         derlen = i2d_ASN1_SET_ANY(sk, &der);
 489     else
 490         derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der);
 491
 492     if (derlen < 0)
 493         goto bad;
 494     if ((ret = ASN1_TYPE_new()) == NULL)
 495         goto bad;
 496     if ((ret->value.asn1_string = ASN1_STRING_type_new(utype)) == NULL)
 497         goto bad;
 498
 499     ret->type = utype;
 500     ret->value.asn1_string->data = der;
 501     ret->value.asn1_string->length = derlen;
 502
 503     der = NULL;
 504
 505  bad:
 506
 507     OPENSSL_free(der);
 508
 509     sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free);
 510     X509V3_section_free(cnf, sect);
 511
 512     return ret;
 513 }
 514
 515 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class,
 516                       int exp_constructed, int exp_pad, int imp_ok)
 517 {
 518     tag_exp_type *exp_tmp;
 519     /* Can only have IMPLICIT if permitted */
 520     if ((arg->imp_tag != -1) && !imp_ok) {
 521         ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG);
 522         return 0;
 523     }
 524
 525     if (arg->exp_count == ASN1_FLAG_EXP_MAX) {
 526         ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED);
 527         return 0;
 528     }
 529
 530     exp_tmp = &arg->exp_list[arg->exp_count++];
 531
 532     /*
 533      * If IMPLICIT set tag to implicit value then reset implicit tag since it
 534      * has been used.
 535      */
 536     if (arg->imp_tag != -1) {
 537         exp_tmp->exp_tag = arg->imp_tag;
 538         exp_tmp->exp_class = arg->imp_class;
 539         arg->imp_tag = -1;
 540         arg->imp_class = -1;
 541     } else {
 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 static int asn1_str2tag(const char *tagstr, int len)
 552 {
 553     unsigned int i;
 554     static const struct tag_name_st *tntmp, tnst[] = {
 555         ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN),
 556         ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN),
 557         ASN1_GEN_STR("NULL", V_ASN1_NULL),
 558         ASN1_GEN_STR("INT", V_ASN1_INTEGER),
 559         ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER),
 560         ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED),
 561         ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED),
 562         ASN1_GEN_STR("OID", V_ASN1_OBJECT),
 563         ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT),
 564         ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME),
 565         ASN1_GEN_STR("UTC", V_ASN1_UTCTIME),
 566         ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME),
 567         ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME),
 568         ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING),
 569         ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING),
 570         ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING),
 571         ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING),
 572         ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING),
 573         ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING),
 574         ASN1_GEN_STR("IA5", V_ASN1_IA5STRING),
 575         ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING),
 576         ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING),
 577         ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING),
 578         ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING),
 579         ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING),
 580         ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING),
 581         ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING),
 582         ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING),
 583         ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING),
 584         ASN1_GEN_STR("T61", V_ASN1_T61STRING),
 585         ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING),
 586         ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING),
 587         ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING),
 588         ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING),
 589         ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING),
 590         ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING),
 591
 592         /* Special cases */
 593         ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE),
 594         ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE),
 595         ASN1_GEN_STR("SET", V_ASN1_SET),
 596         /* type modifiers */
 597         /* Explicit tag */
 598         ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP),
 599         ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP),
 600         /* Implicit tag */
 601         ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP),
 602         ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP),
 603         /* OCTET STRING wrapper */
 604         ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP),
 605         /* SEQUENCE wrapper */
 606         ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP),
 607         /* SET wrapper */
 608         ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP),
 609         /* BIT STRING wrapper */
 610         ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP),
 611         ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT),
 612         ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT),
 613     };
 614
 615     if (len == -1)
 616         len = strlen(tagstr);
 617
 618     tntmp = tnst;
 619     for (i = 0; i < OSSL_NELEM(tnst); i++, tntmp++) {
 620         if ((len == tntmp->len) && (strncmp(tntmp->strnam, tagstr, len) == 0))
 621             return tntmp->tag;
 622     }
 623
 624     return -1;
 625 }
 626
 627 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype)
 628 {
 629     ASN1_TYPE *atmp = NULL;
 630     CONF_VALUE vtmp;
 631     unsigned char *rdata;
 632     long rdlen;
 633     int no_unused = 1;
 634
 635     if ((atmp = ASN1_TYPE_new()) == NULL) {
 636         ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 637         return NULL;
 638     }
 639
 640     if (!str)
 641         str = "";
 642
 643     switch (utype) {
 644
 645     case V_ASN1_NULL:
 646         if (str && *str) {
 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             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT);
 655             goto bad_form;
 656         }
 657         vtmp.name = NULL;
 658         vtmp.section = NULL;
 659         vtmp.value = (char *)str;
 660         if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) {
 661             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN);
 662             goto bad_str;
 663         }
 664         break;
 665
 666     case V_ASN1_INTEGER:
 667     case V_ASN1_ENUMERATED:
 668         if (format != ASN1_GEN_FORMAT_ASCII) {
 669             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT);
 670             goto bad_form;
 671         }
 672         if ((atmp->value.integer
 673                     = s2i_ASN1_INTEGER(NULL, (char *)str)) == NULL) {
 674             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER);
 675             goto bad_str;
 676         }
 677         break;
 678
 679     case V_ASN1_OBJECT:
 680         if (format != ASN1_GEN_FORMAT_ASCII) {
 681             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT);
 682             goto bad_form;
 683         }
 684         if ((atmp->value.object = OBJ_txt2obj(str, 0)) == NULL) {
 685             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT);
 686             goto bad_str;
 687         }
 688         break;
 689
 690     case V_ASN1_UTCTIME:
 691     case V_ASN1_GENERALIZEDTIME:
 692         if (format != ASN1_GEN_FORMAT_ASCII) {
 693             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT);
 694             goto bad_form;
 695         }
 696         if ((atmp->value.asn1_string = ASN1_STRING_new()) == NULL) {
 697             ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 698             goto bad_str;
 699         }
 700         if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) {
 701             ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 702             goto bad_str;
 703         }
 704         atmp->value.asn1_string->type = utype;
 705         if (!ASN1_TIME_check(atmp->value.asn1_string)) {
 706             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE);
 707             goto bad_str;
 708         }
 709
 710         break;
 711
 712     case V_ASN1_BMPSTRING:
 713     case V_ASN1_PRINTABLESTRING:
 714     case V_ASN1_IA5STRING:
 715     case V_ASN1_T61STRING:
 716     case V_ASN1_UTF8STRING:
 717     case V_ASN1_VISIBLESTRING:
 718     case V_ASN1_UNIVERSALSTRING:
 719     case V_ASN1_GENERALSTRING:
 720     case V_ASN1_NUMERICSTRING:
 721         if (format == ASN1_GEN_FORMAT_ASCII)
 722             format = MBSTRING_ASC;
 723         else if (format == ASN1_GEN_FORMAT_UTF8)
 724             format = MBSTRING_UTF8;
 725         else {
 726             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT);
 727             goto bad_form;
 728         }
 729
 730         if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str,
 731                                -1, format, ASN1_tag2bit(utype)) <= 0) {
 732             ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 733             goto bad_str;
 734         }
 735
 736         break;
 737
 738     case V_ASN1_BIT_STRING:
 739     case V_ASN1_OCTET_STRING:
 740         if ((atmp->value.asn1_string = ASN1_STRING_new()) == NULL) {
 741             ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE);
 742             goto bad_form;
 743         }
 744
 745         if (format == ASN1_GEN_FORMAT_HEX) {
 746             if ((rdata = string_to_hex((char *)str, &rdlen)) == NULL) {
 747                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX);
 748                 goto bad_str;
 749             }
 750             atmp->value.asn1_string->data = rdata;
 751             atmp->value.asn1_string->length = rdlen;
 752             atmp->value.asn1_string->type = utype;
 753         } else if (format == ASN1_GEN_FORMAT_ASCII)
 754             ASN1_STRING_set(atmp->value.asn1_string, str, -1);
 755         else if ((format == ASN1_GEN_FORMAT_BITLIST)
 756                  && (utype == V_ASN1_BIT_STRING)) {
 757             if (!CONF_parse_list
 758                 (str, ',', 1, bitstr_cb, atmp->value.bit_string)) {
 759                 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR);
 760                 goto bad_str;
 761             }
 762             no_unused = 0;
 763
 764         } else {
 765             ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT);
 766             goto bad_form;
 767         }
 768
 769         if ((utype == V_ASN1_BIT_STRING) && no_unused) {
 770             atmp->value.asn1_string->flags
 771                 &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
 772             atmp->value.asn1_string->flags |= ASN1_STRING_FLAG_BITS_LEFT;
 773         }
 774
 775         break;
 776
 777     default:
 778         ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE);
 779         goto bad_str;
 780     }
 781
 782     atmp->type = utype;
 783     return atmp;
 784
 785  bad_str:
 786     ERR_add_error_data(2, "string=", str);
 787  bad_form:
 788
 789     ASN1_TYPE_free(atmp);
 790     return NULL;
 791
 792 }
 793
 794 static int bitstr_cb(const char *elem, int len, void *bitstr)
 795 {
 796     long bitnum;
 797     char *eptr;
 798     if (!elem)
 799         return 0;
 800     bitnum = strtoul(elem, &eptr, 10);
 801     if (eptr && *eptr && (eptr != elem + len))
 802         return 0;
 803     if (bitnum < 0) {
 804         ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER);
 805         return 0;
 806     }
 807     if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) {
 808         ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE);
 809         return 0;
 810     }
 811     return 1;
 812 }
 813
 814 static int mask_cb(const char *elem, int len, void *arg)
 815 {
 816     unsigned long *pmask = arg, tmpmask;
 817     int tag;
 818     if (elem == NULL)
 819         return 0;
 820     if ((len == 3) && (strncmp(elem, "DIR", 3) == 0)) {
 821         *pmask |= B_ASN1_DIRECTORYSTRING;
 822         return 1;
 823     }
 824     tag = asn1_str2tag(elem, len);
 825     if (!tag || (tag & ASN1_GEN_FLAG))
 826         return 0;
 827     tmpmask = ASN1_tag2bit(tag);
 828     if (!tmpmask)
 829         return 0;
 830     *pmask |= tmpmask;
 831     return 1;
 832 }
 833
 834 int ASN1_str2mask(const char *str, unsigned long *pmask)
 835 {
 836     *pmask = 0;
 837     return CONF_parse_list(str, '|', 1, mask_cb, pmask);
 838 }