1 /* $OpenBSD: asn1_gen.c,v 1.19 2022/05/24 19:56:13 tb Exp $ */ 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 <string.h> 60 61 #include <openssl/asn1.h> 62 #include <openssl/err.h> 63 #include <openssl/x509v3.h> 64 65 #include "asn1_locl.h" 66 67 #define ASN1_GEN_FLAG 0x10000 68 #define ASN1_GEN_FLAG_IMP (ASN1_GEN_FLAG|1) 69 #define ASN1_GEN_FLAG_EXP (ASN1_GEN_FLAG|2) 70 #define ASN1_GEN_FLAG_TAG (ASN1_GEN_FLAG|3) 71 #define ASN1_GEN_FLAG_BITWRAP (ASN1_GEN_FLAG|4) 72 #define ASN1_GEN_FLAG_OCTWRAP (ASN1_GEN_FLAG|5) 73 #define ASN1_GEN_FLAG_SEQWRAP (ASN1_GEN_FLAG|6) 74 #define ASN1_GEN_FLAG_SETWRAP (ASN1_GEN_FLAG|7) 75 #define ASN1_GEN_FLAG_FORMAT (ASN1_GEN_FLAG|8) 76 77 #define ASN1_GEN_STR(str,val){str, sizeof(str) - 1, val} 78 79 #define ASN1_FLAG_EXP_MAX 20 80 81 /* Input formats */ 82 83 /* ASCII: default */ 84 #define ASN1_GEN_FORMAT_ASCII 1 85 /* UTF8 */ 86 #define ASN1_GEN_FORMAT_UTF8 2 87 /* Hex */ 88 #define ASN1_GEN_FORMAT_HEX 3 89 /* List of bits */ 90 #define ASN1_GEN_FORMAT_BITLIST 4 91 92 struct tag_name_st { 93 const char *strnam; 94 int len; 95 int tag; 96 }; 97 98 typedef struct { 99 int exp_tag; 100 int exp_class; 101 int exp_constructed; 102 int exp_pad; 103 long exp_len; 104 } tag_exp_type; 105 106 typedef struct { 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, 119 int exp_constructed, int exp_pad, int imp_ok); 120 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass); 121 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf); 122 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype); 123 static int asn1_str2tag(const char *tagstr, int len); 124 125 ASN1_TYPE * 126 ASN1_generate_nconf(const char *str, CONF *nconf) 127 { 128 X509V3_CTX cnf; 129 130 if (!nconf) 131 return ASN1_generate_v3(str, NULL); 132 133 X509V3_set_nconf(&cnf, nconf); 134 return ASN1_generate_v3(str, &cnf); 135 } 136 137 ASN1_TYPE * 138 ASN1_generate_v3(const char *str, X509V3_CTX *cnf) 139 { 140 ASN1_TYPE *ret; 141 tag_exp_arg asn1_tags; 142 tag_exp_type *etmp; 143 144 int i, len; 145 146 unsigned char *orig_der = NULL, *new_der = NULL; 147 const unsigned char *cpy_start; 148 unsigned char *p; 149 const unsigned char *cp; 150 int cpy_len; 151 long hdr_len = 0; 152 int hdr_constructed = 0, hdr_tag, hdr_class; 153 int r; 154 155 asn1_tags.imp_tag = -1; 156 asn1_tags.imp_class = -1; 157 asn1_tags.format = ASN1_GEN_FORMAT_ASCII; 158 asn1_tags.exp_count = 0; 159 if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0) 160 return NULL; 161 162 if ((asn1_tags.utype == V_ASN1_SEQUENCE) || 163 (asn1_tags.utype == V_ASN1_SET)) { 164 if (!cnf) { 165 ASN1error(ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG); 166 return NULL; 167 } 168 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf); 169 } else 170 ret = asn1_str2type(asn1_tags.str, asn1_tags.format, 171 asn1_tags.utype); 172 173 if (!ret) 174 return NULL; 175 176 /* If no tagging return base type */ 177 if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0)) 178 return ret; 179 180 /* Generate the encoding */ 181 cpy_len = i2d_ASN1_TYPE(ret, &orig_der); 182 ASN1_TYPE_free(ret); 183 ret = NULL; 184 /* Set point to start copying for modified encoding */ 185 cpy_start = orig_der; 186 187 /* Do we need IMPLICIT tagging? */ 188 if (asn1_tags.imp_tag != -1) { 189 /* If IMPLICIT we will replace the underlying tag */ 190 /* Skip existing tag+len */ 191 r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, 192 &hdr_class, cpy_len); 193 if (r & 0x80) 194 goto err; 195 /* Update copy length */ 196 cpy_len -= cpy_start - orig_der; 197 /* For IMPLICIT tagging the length should match the 198 * original length and constructed flag should be 199 * consistent. 200 */ 201 if (r & 0x1) { 202 /* Indefinite length constructed */ 203 hdr_constructed = 2; 204 hdr_len = 0; 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 } else 213 len = cpy_len; 214 215 /* Work out length in any EXPLICIT, starting from end */ 216 217 for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1; 218 i < asn1_tags.exp_count; i++, etmp--) { 219 /* Content length: number of content octets + any padding */ 220 len += etmp->exp_pad; 221 etmp->exp_len = len; 222 /* Total object length: length including new header */ 223 len = ASN1_object_size(0, len, etmp->exp_tag); 224 } 225 226 /* Allocate buffer for new encoding */ 227 228 new_der = malloc(len); 229 if (!new_der) 230 goto err; 231 232 /* Generate tagged encoding */ 233 p = new_der; 234 235 /* Output explicit tags first */ 236 for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count; 237 i++, etmp++) { 238 ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len, 239 etmp->exp_tag, etmp->exp_class); 240 if (etmp->exp_pad) 241 *p++ = 0; 242 } 243 244 /* If IMPLICIT, output tag */ 245 246 if (asn1_tags.imp_tag != -1) { 247 if (asn1_tags.imp_class == V_ASN1_UNIVERSAL && 248 (asn1_tags.imp_tag == V_ASN1_SEQUENCE || 249 asn1_tags.imp_tag == V_ASN1_SET)) 250 hdr_constructed = V_ASN1_CONSTRUCTED; 251 ASN1_put_object(&p, hdr_constructed, hdr_len, 252 asn1_tags.imp_tag, asn1_tags.imp_class); 253 } 254 255 /* Copy across original encoding */ 256 memcpy(p, cpy_start, cpy_len); 257 258 cp = new_der; 259 260 /* Obtain new ASN1_TYPE structure */ 261 ret = d2i_ASN1_TYPE(NULL, &cp, len); 262 263 err: 264 free(orig_der); 265 free(new_der); 266 267 return ret; 268 } 269 270 static int 271 asn1_cb(const char *elem, int len, void *bitstr) 272 { 273 tag_exp_arg *arg = bitstr; 274 int i; 275 int utype; 276 int vlen = 0; 277 const char *p, *vstart = NULL; 278 279 int tmp_tag, tmp_class; 280 281 for (i = 0, p = elem; i < len; p++, i++) { 282 /* Look for the ':' in name value pairs */ 283 if (*p == ':') { 284 vstart = p + 1; 285 vlen = len - (vstart - elem); 286 len = p - elem; 287 break; 288 } 289 } 290 291 utype = asn1_str2tag(elem, len); 292 293 if (utype == -1) { 294 ASN1error(ASN1_R_UNKNOWN_TAG); 295 ERR_asprintf_error_data("tag=%s", elem); 296 return -1; 297 } 298 299 /* If this is not a modifier mark end of string and exit */ 300 if (!(utype & ASN1_GEN_FLAG)) { 301 arg->utype = utype; 302 arg->str = vstart; 303 /* If no value and not end of string, error */ 304 if (!vstart && elem[len]) { 305 ASN1error(ASN1_R_MISSING_VALUE); 306 return -1; 307 } 308 return 0; 309 } 310 311 switch (utype) { 312 313 case ASN1_GEN_FLAG_IMP: 314 /* Check for illegal multiple IMPLICIT tagging */ 315 if (arg->imp_tag != -1) { 316 ASN1error(ASN1_R_ILLEGAL_NESTED_TAGGING); 317 return -1; 318 } 319 if (!parse_tagging(vstart, vlen, &arg->imp_tag, 320 &arg->imp_class)) 321 return -1; 322 break; 323 324 case ASN1_GEN_FLAG_EXP: 325 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class)) 326 return -1; 327 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0)) 328 return -1; 329 break; 330 331 case ASN1_GEN_FLAG_SEQWRAP: 332 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1)) 333 return -1; 334 break; 335 336 case ASN1_GEN_FLAG_SETWRAP: 337 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1)) 338 return -1; 339 break; 340 341 case ASN1_GEN_FLAG_BITWRAP: 342 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1)) 343 return -1; 344 break; 345 346 case ASN1_GEN_FLAG_OCTWRAP: 347 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1)) 348 return -1; 349 break; 350 351 case ASN1_GEN_FLAG_FORMAT: 352 if (vstart == NULL) { 353 ASN1error(ASN1_R_ILLEGAL_FORMAT); 354 return -1; 355 } 356 if (!strncmp(vstart, "ASCII", 5)) 357 arg->format = ASN1_GEN_FORMAT_ASCII; 358 else if (!strncmp(vstart, "UTF8", 4)) 359 arg->format = ASN1_GEN_FORMAT_UTF8; 360 else if (!strncmp(vstart, "HEX", 3)) 361 arg->format = ASN1_GEN_FORMAT_HEX; 362 else if (!strncmp(vstart, "BITLIST", 7)) 363 arg->format = ASN1_GEN_FORMAT_BITLIST; 364 else { 365 ASN1error(ASN1_R_UNKOWN_FORMAT); 366 return -1; 367 } 368 break; 369 370 } 371 372 return 1; 373 } 374 375 static int 376 parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass) 377 { 378 long tag_num; 379 char *eptr; 380 381 if (!vstart) 382 return 0; 383 tag_num = strtoul(vstart, &eptr, 10); 384 /* Check we haven't gone past max length: should be impossible */ 385 if (eptr && *eptr && (eptr > vstart + vlen)) 386 return 0; 387 if (tag_num < 0) { 388 ASN1error(ASN1_R_INVALID_NUMBER); 389 return 0; 390 } 391 *ptag = tag_num; 392 /* If we have non numeric characters, parse them */ 393 if (eptr) 394 vlen -= eptr - vstart; 395 else 396 vlen = 0; 397 if (vlen) { 398 switch (*eptr) { 399 400 case 'U': 401 *pclass = V_ASN1_UNIVERSAL; 402 break; 403 404 case 'A': 405 *pclass = V_ASN1_APPLICATION; 406 break; 407 408 case 'P': 409 *pclass = V_ASN1_PRIVATE; 410 break; 411 412 case 'C': 413 *pclass = V_ASN1_CONTEXT_SPECIFIC; 414 break; 415 416 default: 417 ASN1error(ASN1_R_INVALID_MODIFIER); 418 ERR_asprintf_error_data("Char=%c", *eptr); 419 return 0; 420 break; 421 422 } 423 } else 424 *pclass = V_ASN1_CONTEXT_SPECIFIC; 425 426 return 1; 427 428 } 429 430 /* Handle multiple types: SET and SEQUENCE */ 431 432 static ASN1_TYPE * 433 asn1_multi(int utype, const char *section, X509V3_CTX *cnf) 434 { 435 ASN1_TYPE *ret = NULL; 436 STACK_OF(ASN1_TYPE) *sk = NULL; 437 STACK_OF(CONF_VALUE) *sect = NULL; 438 unsigned char *der = NULL; 439 int derlen; 440 int i; 441 sk = sk_ASN1_TYPE_new_null(); 442 if (!sk) 443 goto bad; 444 if (section) { 445 if (!cnf) 446 goto bad; 447 sect = X509V3_get_section(cnf, (char *)section); 448 if (!sect) 449 goto bad; 450 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) { 451 ASN1_TYPE *typ = ASN1_generate_v3( 452 sk_CONF_VALUE_value(sect, i)->value, cnf); 453 if (!typ) 454 goto bad; 455 if (!sk_ASN1_TYPE_push(sk, typ)) 456 goto bad; 457 } 458 } 459 460 /* Now we has a STACK of the components, convert to the correct form */ 461 462 if (utype == V_ASN1_SET) 463 derlen = i2d_ASN1_SET_ANY(sk, &der); 464 else 465 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der); 466 467 if (derlen < 0) 468 goto bad; 469 470 if (!(ret = ASN1_TYPE_new())) 471 goto bad; 472 473 if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype))) 474 goto bad; 475 476 ret->type = utype; 477 478 ret->value.asn1_string->data = der; 479 ret->value.asn1_string->length = derlen; 480 481 der = NULL; 482 483 bad: 484 free(der); 485 if (sk) 486 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free); 487 if (sect) 488 X509V3_section_free(cnf, sect); 489 490 return ret; 491 } 492 493 static int 494 append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, 495 int exp_pad, int imp_ok) 496 { 497 tag_exp_type *exp_tmp; 498 499 /* Can only have IMPLICIT if permitted */ 500 if ((arg->imp_tag != -1) && !imp_ok) { 501 ASN1error(ASN1_R_ILLEGAL_IMPLICIT_TAG); 502 return 0; 503 } 504 505 if (arg->exp_count == ASN1_FLAG_EXP_MAX) { 506 ASN1error(ASN1_R_DEPTH_EXCEEDED); 507 return 0; 508 } 509 510 exp_tmp = &arg->exp_list[arg->exp_count++]; 511 512 /* If IMPLICIT set tag to implicit value then 513 * reset implicit tag since it has been used. 514 */ 515 if (arg->imp_tag != -1) { 516 exp_tmp->exp_tag = arg->imp_tag; 517 exp_tmp->exp_class = arg->imp_class; 518 arg->imp_tag = -1; 519 arg->imp_class = -1; 520 } else { 521 exp_tmp->exp_tag = exp_tag; 522 exp_tmp->exp_class = exp_class; 523 } 524 exp_tmp->exp_constructed = exp_constructed; 525 exp_tmp->exp_pad = exp_pad; 526 527 return 1; 528 } 529 530 static int 531 asn1_str2tag(const char *tagstr, int len) 532 { 533 unsigned int i; 534 static const struct tag_name_st *tntmp, tnst [] = { 535 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN), 536 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN), 537 ASN1_GEN_STR("NULL", V_ASN1_NULL), 538 ASN1_GEN_STR("INT", V_ASN1_INTEGER), 539 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER), 540 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED), 541 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED), 542 ASN1_GEN_STR("OID", V_ASN1_OBJECT), 543 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT), 544 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME), 545 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME), 546 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME), 547 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME), 548 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING), 549 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING), 550 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING), 551 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING), 552 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING), 553 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING), 554 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING), 555 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING), 556 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING), 557 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING), 558 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING), 559 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING), 560 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING), 561 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING), 562 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING), 563 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING), 564 ASN1_GEN_STR("T61", V_ASN1_T61STRING), 565 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING), 566 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING), 567 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING), 568 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING), 569 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING), 570 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING), 571 572 /* Special cases */ 573 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE), 574 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE), 575 ASN1_GEN_STR("SET", V_ASN1_SET), 576 /* type modifiers */ 577 /* Explicit tag */ 578 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP), 579 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP), 580 /* Implicit tag */ 581 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP), 582 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP), 583 /* OCTET STRING wrapper */ 584 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP), 585 /* SEQUENCE wrapper */ 586 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP), 587 /* SET wrapper */ 588 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP), 589 /* BIT STRING wrapper */ 590 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP), 591 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT), 592 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT), 593 }; 594 595 if (len == -1) 596 len = strlen(tagstr); 597 598 tntmp = tnst; 599 for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); 600 i++, tntmp++) { 601 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len)) 602 return tntmp->tag; 603 } 604 605 return -1; 606 } 607 608 static ASN1_TYPE * 609 asn1_str2type(const char *str, int format, int utype) 610 { 611 ASN1_TYPE *atmp = NULL; 612 CONF_VALUE vtmp; 613 unsigned char *rdata; 614 long rdlen; 615 int no_unused = 1; 616 617 if (!(atmp = ASN1_TYPE_new())) { 618 ASN1error(ERR_R_MALLOC_FAILURE); 619 return NULL; 620 } 621 622 if (!str) 623 str = ""; 624 625 switch (utype) { 626 627 case V_ASN1_NULL: 628 if (str && *str) { 629 ASN1error(ASN1_R_ILLEGAL_NULL_VALUE); 630 goto bad_form; 631 } 632 break; 633 634 case V_ASN1_BOOLEAN: 635 if (format != ASN1_GEN_FORMAT_ASCII) { 636 ASN1error(ASN1_R_NOT_ASCII_FORMAT); 637 goto bad_form; 638 } 639 vtmp.name = NULL; 640 vtmp.section = NULL; 641 vtmp.value = (char *)str; 642 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) { 643 ASN1error(ASN1_R_ILLEGAL_BOOLEAN); 644 goto bad_str; 645 } 646 break; 647 648 case V_ASN1_INTEGER: 649 case V_ASN1_ENUMERATED: 650 if (format != ASN1_GEN_FORMAT_ASCII) { 651 ASN1error(ASN1_R_INTEGER_NOT_ASCII_FORMAT); 652 goto bad_form; 653 } 654 if (!(atmp->value.integer = 655 s2i_ASN1_INTEGER(NULL, (char *)str))) { 656 ASN1error(ASN1_R_ILLEGAL_INTEGER); 657 goto bad_str; 658 } 659 break; 660 661 case V_ASN1_OBJECT: 662 if (format != ASN1_GEN_FORMAT_ASCII) { 663 ASN1error(ASN1_R_OBJECT_NOT_ASCII_FORMAT); 664 goto bad_form; 665 } 666 if (!(atmp->value.object = OBJ_txt2obj(str, 0))) { 667 ASN1error(ASN1_R_ILLEGAL_OBJECT); 668 goto bad_str; 669 } 670 break; 671 672 case V_ASN1_UTCTIME: 673 case V_ASN1_GENERALIZEDTIME: 674 if (format != ASN1_GEN_FORMAT_ASCII) { 675 ASN1error(ASN1_R_TIME_NOT_ASCII_FORMAT); 676 goto bad_form; 677 } 678 if (!(atmp->value.asn1_string = ASN1_STRING_new())) { 679 ASN1error(ERR_R_MALLOC_FAILURE); 680 goto bad_str; 681 } 682 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) { 683 ASN1error(ERR_R_MALLOC_FAILURE); 684 goto bad_str; 685 } 686 atmp->value.asn1_string->type = utype; 687 if (!ASN1_TIME_check(atmp->value.asn1_string)) { 688 ASN1error(ASN1_R_ILLEGAL_TIME_VALUE); 689 goto bad_str; 690 } 691 break; 692 693 case V_ASN1_BMPSTRING: 694 case V_ASN1_PRINTABLESTRING: 695 case V_ASN1_IA5STRING: 696 case V_ASN1_T61STRING: 697 case V_ASN1_UTF8STRING: 698 case V_ASN1_VISIBLESTRING: 699 case V_ASN1_UNIVERSALSTRING: 700 case V_ASN1_GENERALSTRING: 701 case V_ASN1_NUMERICSTRING: 702 703 if (format == ASN1_GEN_FORMAT_ASCII) 704 format = MBSTRING_ASC; 705 else if (format == ASN1_GEN_FORMAT_UTF8) 706 format = MBSTRING_UTF8; 707 else { 708 ASN1error(ASN1_R_ILLEGAL_FORMAT); 709 goto bad_form; 710 } 711 712 if (ASN1_mbstring_copy(&atmp->value.asn1_string, 713 (unsigned char *)str, -1, format, 714 ASN1_tag2bit(utype)) <= 0) { 715 ASN1error(ERR_R_MALLOC_FAILURE); 716 goto bad_str; 717 } 718 break; 719 720 case V_ASN1_BIT_STRING: 721 case V_ASN1_OCTET_STRING: 722 if (!(atmp->value.asn1_string = ASN1_STRING_new())) { 723 ASN1error(ERR_R_MALLOC_FAILURE); 724 goto bad_form; 725 } 726 727 if (format == ASN1_GEN_FORMAT_HEX) { 728 729 if (!(rdata = string_to_hex((char *)str, &rdlen))) { 730 ASN1error(ASN1_R_ILLEGAL_HEX); 731 goto bad_str; 732 } 733 734 atmp->value.asn1_string->data = rdata; 735 atmp->value.asn1_string->length = rdlen; 736 atmp->value.asn1_string->type = utype; 737 738 } else if (format == ASN1_GEN_FORMAT_ASCII) { 739 if (ASN1_STRING_set(atmp->value.asn1_string, str, 740 -1) == 0) { 741 ASN1error(ERR_R_MALLOC_FAILURE); 742 goto bad_str; 743 } 744 } else if ((format == ASN1_GEN_FORMAT_BITLIST) && 745 (utype == V_ASN1_BIT_STRING)) { 746 if (!CONF_parse_list(str, ',', 1, bitstr_cb, 747 atmp->value.bit_string)) { 748 ASN1error(ASN1_R_LIST_ERROR); 749 goto bad_str; 750 } 751 no_unused = 0; 752 753 } else { 754 ASN1error(ASN1_R_ILLEGAL_BITSTRING_FORMAT); 755 goto bad_form; 756 } 757 758 if ((utype == V_ASN1_BIT_STRING) && no_unused) { 759 if (!asn1_abs_set_unused_bits(atmp->value.asn1_string, 760 0)) 761 goto bad_str; 762 } 763 764 break; 765 766 default: 767 ASN1error(ASN1_R_UNSUPPORTED_TYPE); 768 goto bad_str; 769 break; 770 } 771 772 atmp->type = utype; 773 return atmp; 774 775 bad_str: 776 ERR_asprintf_error_data("string=%s", str); 777 bad_form: 778 ASN1_TYPE_free(atmp); 779 return NULL; 780 } 781 782 static int 783 bitstr_cb(const char *elem, int len, void *bitstr) 784 { 785 long bitnum; 786 char *eptr; 787 788 if (!elem) 789 return 0; 790 bitnum = strtoul(elem, &eptr, 10); 791 if (eptr && *eptr && (eptr != elem + len)) 792 return 0; 793 if (bitnum < 0) { 794 ASN1error(ASN1_R_INVALID_NUMBER); 795 return 0; 796 } 797 if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) { 798 ASN1error(ERR_R_MALLOC_FAILURE); 799 return 0; 800 } 801 return 1; 802 } 803