1 /* $OpenBSD: asn1_gen.c,v 1.17 2018/04/25 11:48:21 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 #define ASN1_GEN_FLAG 0x10000 66 #define ASN1_GEN_FLAG_IMP (ASN1_GEN_FLAG|1) 67 #define ASN1_GEN_FLAG_EXP (ASN1_GEN_FLAG|2) 68 #define ASN1_GEN_FLAG_TAG (ASN1_GEN_FLAG|3) 69 #define ASN1_GEN_FLAG_BITWRAP (ASN1_GEN_FLAG|4) 70 #define ASN1_GEN_FLAG_OCTWRAP (ASN1_GEN_FLAG|5) 71 #define ASN1_GEN_FLAG_SEQWRAP (ASN1_GEN_FLAG|6) 72 #define ASN1_GEN_FLAG_SETWRAP (ASN1_GEN_FLAG|7) 73 #define ASN1_GEN_FLAG_FORMAT (ASN1_GEN_FLAG|8) 74 75 #define ASN1_GEN_STR(str,val){str, sizeof(str) - 1, val} 76 77 #define ASN1_FLAG_EXP_MAX 20 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 int bitstr_cb(const char *elem, int len, void *bitstr); 115 static int asn1_cb(const char *elem, int len, void *bitstr); 116 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, 117 int exp_constructed, int exp_pad, int imp_ok); 118 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass); 119 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf); 120 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype); 121 static int asn1_str2tag(const char *tagstr, int len); 122 123 ASN1_TYPE * 124 ASN1_generate_nconf(const 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 * 136 ASN1_generate_v3(const char *str, X509V3_CTX *cnf) 137 { 138 ASN1_TYPE *ret; 139 tag_exp_arg asn1_tags; 140 tag_exp_type *etmp; 141 142 int i, len; 143 144 unsigned char *orig_der = NULL, *new_der = NULL; 145 const unsigned char *cpy_start; 146 unsigned char *p; 147 const unsigned char *cp; 148 int cpy_len; 149 long hdr_len = 0; 150 int hdr_constructed = 0, hdr_tag, hdr_class; 151 int r; 152 153 asn1_tags.imp_tag = -1; 154 asn1_tags.imp_class = -1; 155 asn1_tags.format = ASN1_GEN_FORMAT_ASCII; 156 asn1_tags.exp_count = 0; 157 if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0) 158 return NULL; 159 160 if ((asn1_tags.utype == V_ASN1_SEQUENCE) || 161 (asn1_tags.utype == V_ASN1_SET)) { 162 if (!cnf) { 163 ASN1error(ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG); 164 return NULL; 165 } 166 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf); 167 } else 168 ret = asn1_str2type(asn1_tags.str, asn1_tags.format, 169 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 /* If IMPLICIT we will replace the underlying tag */ 188 /* Skip existing tag+len */ 189 r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, 190 &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 /* Indefinite length constructed */ 201 hdr_constructed = 2; 202 hdr_len = 0; 203 } else 204 /* Just retain constructed flag */ 205 hdr_constructed = r & V_ASN1_CONSTRUCTED; 206 /* Work out new length with IMPLICIT tag: ignore constructed 207 * because it will mess up if indefinite length 208 */ 209 len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag); 210 } else 211 len = cpy_len; 212 213 /* Work out length in any EXPLICIT, starting from end */ 214 215 for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1; 216 i < asn1_tags.exp_count; i++, etmp--) { 217 /* Content length: number of content octets + any padding */ 218 len += etmp->exp_pad; 219 etmp->exp_len = len; 220 /* Total object length: length including new header */ 221 len = ASN1_object_size(0, len, etmp->exp_tag); 222 } 223 224 /* Allocate buffer for new encoding */ 225 226 new_der = malloc(len); 227 if (!new_der) 228 goto err; 229 230 /* Generate tagged encoding */ 231 p = new_der; 232 233 /* Output explicit tags first */ 234 for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count; 235 i++, etmp++) { 236 ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len, 237 etmp->exp_tag, etmp->exp_class); 238 if (etmp->exp_pad) 239 *p++ = 0; 240 } 241 242 /* If IMPLICIT, output tag */ 243 244 if (asn1_tags.imp_tag != -1) { 245 if (asn1_tags.imp_class == V_ASN1_UNIVERSAL && 246 (asn1_tags.imp_tag == V_ASN1_SEQUENCE || 247 asn1_tags.imp_tag == V_ASN1_SET)) 248 hdr_constructed = V_ASN1_CONSTRUCTED; 249 ASN1_put_object(&p, hdr_constructed, hdr_len, 250 asn1_tags.imp_tag, asn1_tags.imp_class); 251 } 252 253 /* Copy across original encoding */ 254 memcpy(p, cpy_start, cpy_len); 255 256 cp = new_der; 257 258 /* Obtain new ASN1_TYPE structure */ 259 ret = d2i_ASN1_TYPE(NULL, &cp, len); 260 261 err: 262 free(orig_der); 263 free(new_der); 264 265 return ret; 266 } 267 268 static int 269 asn1_cb(const char *elem, int len, void *bitstr) 270 { 271 tag_exp_arg *arg = bitstr; 272 int i; 273 int utype; 274 int vlen = 0; 275 const char *p, *vstart = NULL; 276 277 int tmp_tag, tmp_class; 278 279 for (i = 0, p = elem; i < len; p++, i++) { 280 /* Look for the ':' in name value pairs */ 281 if (*p == ':') { 282 vstart = p + 1; 283 vlen = len - (vstart - elem); 284 len = p - elem; 285 break; 286 } 287 } 288 289 utype = asn1_str2tag(elem, len); 290 291 if (utype == -1) { 292 ASN1error(ASN1_R_UNKNOWN_TAG); 293 ERR_asprintf_error_data("tag=%s", elem); 294 return -1; 295 } 296 297 /* If this is not a modifier mark end of string and exit */ 298 if (!(utype & ASN1_GEN_FLAG)) { 299 arg->utype = utype; 300 arg->str = vstart; 301 /* If no value and not end of string, error */ 302 if (!vstart && elem[len]) { 303 ASN1error(ASN1_R_MISSING_VALUE); 304 return -1; 305 } 306 return 0; 307 } 308 309 switch (utype) { 310 311 case ASN1_GEN_FLAG_IMP: 312 /* Check for illegal multiple IMPLICIT tagging */ 313 if (arg->imp_tag != -1) { 314 ASN1error(ASN1_R_ILLEGAL_NESTED_TAGGING); 315 return -1; 316 } 317 if (!parse_tagging(vstart, vlen, &arg->imp_tag, 318 &arg->imp_class)) 319 return -1; 320 break; 321 322 case ASN1_GEN_FLAG_EXP: 323 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class)) 324 return -1; 325 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0)) 326 return -1; 327 break; 328 329 case ASN1_GEN_FLAG_SEQWRAP: 330 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1)) 331 return -1; 332 break; 333 334 case ASN1_GEN_FLAG_SETWRAP: 335 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1)) 336 return -1; 337 break; 338 339 case ASN1_GEN_FLAG_BITWRAP: 340 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1)) 341 return -1; 342 break; 343 344 case ASN1_GEN_FLAG_OCTWRAP: 345 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1)) 346 return -1; 347 break; 348 349 case ASN1_GEN_FLAG_FORMAT: 350 if (vstart == NULL) { 351 ASN1error(ASN1_R_ILLEGAL_FORMAT); 352 return -1; 353 } 354 if (!strncmp(vstart, "ASCII", 5)) 355 arg->format = ASN1_GEN_FORMAT_ASCII; 356 else if (!strncmp(vstart, "UTF8", 4)) 357 arg->format = ASN1_GEN_FORMAT_UTF8; 358 else if (!strncmp(vstart, "HEX", 3)) 359 arg->format = ASN1_GEN_FORMAT_HEX; 360 else if (!strncmp(vstart, "BITLIST", 7)) 361 arg->format = ASN1_GEN_FORMAT_BITLIST; 362 else { 363 ASN1error(ASN1_R_UNKOWN_FORMAT); 364 return -1; 365 } 366 break; 367 368 } 369 370 return 1; 371 } 372 373 static int 374 parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass) 375 { 376 long tag_num; 377 char *eptr; 378 379 if (!vstart) 380 return 0; 381 tag_num = strtoul(vstart, &eptr, 10); 382 /* Check we haven't gone past max length: should be impossible */ 383 if (eptr && *eptr && (eptr > vstart + vlen)) 384 return 0; 385 if (tag_num < 0) { 386 ASN1error(ASN1_R_INVALID_NUMBER); 387 return 0; 388 } 389 *ptag = tag_num; 390 /* If we have non numeric characters, parse them */ 391 if (eptr) 392 vlen -= eptr - vstart; 393 else 394 vlen = 0; 395 if (vlen) { 396 switch (*eptr) { 397 398 case 'U': 399 *pclass = V_ASN1_UNIVERSAL; 400 break; 401 402 case 'A': 403 *pclass = V_ASN1_APPLICATION; 404 break; 405 406 case 'P': 407 *pclass = V_ASN1_PRIVATE; 408 break; 409 410 case 'C': 411 *pclass = V_ASN1_CONTEXT_SPECIFIC; 412 break; 413 414 default: 415 ASN1error(ASN1_R_INVALID_MODIFIER); 416 ERR_asprintf_error_data("Char=%c", *eptr); 417 return 0; 418 break; 419 420 } 421 } else 422 *pclass = V_ASN1_CONTEXT_SPECIFIC; 423 424 return 1; 425 426 } 427 428 /* Handle multiple types: SET and SEQUENCE */ 429 430 static ASN1_TYPE * 431 asn1_multi(int utype, const char *section, X509V3_CTX *cnf) 432 { 433 ASN1_TYPE *ret = NULL; 434 STACK_OF(ASN1_TYPE) *sk = NULL; 435 STACK_OF(CONF_VALUE) *sect = NULL; 436 unsigned char *der = NULL; 437 int derlen; 438 int i; 439 sk = sk_ASN1_TYPE_new_null(); 440 if (!sk) 441 goto bad; 442 if (section) { 443 if (!cnf) 444 goto bad; 445 sect = X509V3_get_section(cnf, (char *)section); 446 if (!sect) 447 goto bad; 448 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) { 449 ASN1_TYPE *typ = ASN1_generate_v3( 450 sk_CONF_VALUE_value(sect, i)->value, cnf); 451 if (!typ) 452 goto bad; 453 if (!sk_ASN1_TYPE_push(sk, typ)) 454 goto bad; 455 } 456 } 457 458 /* Now we has a STACK of the components, convert to the correct form */ 459 460 if (utype == V_ASN1_SET) 461 derlen = i2d_ASN1_SET_ANY(sk, &der); 462 else 463 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der); 464 465 if (derlen < 0) 466 goto bad; 467 468 if (!(ret = ASN1_TYPE_new())) 469 goto bad; 470 471 if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype))) 472 goto bad; 473 474 ret->type = utype; 475 476 ret->value.asn1_string->data = der; 477 ret->value.asn1_string->length = derlen; 478 479 der = NULL; 480 481 bad: 482 free(der); 483 if (sk) 484 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free); 485 if (sect) 486 X509V3_section_free(cnf, sect); 487 488 return ret; 489 } 490 491 static int 492 append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, 493 int exp_pad, int imp_ok) 494 { 495 tag_exp_type *exp_tmp; 496 497 /* Can only have IMPLICIT if permitted */ 498 if ((arg->imp_tag != -1) && !imp_ok) { 499 ASN1error(ASN1_R_ILLEGAL_IMPLICIT_TAG); 500 return 0; 501 } 502 503 if (arg->exp_count == ASN1_FLAG_EXP_MAX) { 504 ASN1error(ASN1_R_DEPTH_EXCEEDED); 505 return 0; 506 } 507 508 exp_tmp = &arg->exp_list[arg->exp_count++]; 509 510 /* If IMPLICIT set tag to implicit value then 511 * reset implicit tag since it has been used. 512 */ 513 if (arg->imp_tag != -1) { 514 exp_tmp->exp_tag = arg->imp_tag; 515 exp_tmp->exp_class = arg->imp_class; 516 arg->imp_tag = -1; 517 arg->imp_class = -1; 518 } else { 519 exp_tmp->exp_tag = exp_tag; 520 exp_tmp->exp_class = exp_class; 521 } 522 exp_tmp->exp_constructed = exp_constructed; 523 exp_tmp->exp_pad = exp_pad; 524 525 return 1; 526 } 527 528 static int 529 asn1_str2tag(const char *tagstr, int len) 530 { 531 unsigned int i; 532 static const struct tag_name_st *tntmp, tnst [] = { 533 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN), 534 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN), 535 ASN1_GEN_STR("NULL", V_ASN1_NULL), 536 ASN1_GEN_STR("INT", V_ASN1_INTEGER), 537 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER), 538 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED), 539 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED), 540 ASN1_GEN_STR("OID", V_ASN1_OBJECT), 541 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT), 542 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME), 543 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME), 544 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME), 545 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME), 546 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING), 547 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING), 548 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING), 549 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING), 550 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING), 551 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING), 552 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING), 553 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING), 554 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING), 555 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING), 556 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING), 557 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING), 558 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING), 559 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING), 560 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING), 561 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING), 562 ASN1_GEN_STR("T61", V_ASN1_T61STRING), 563 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING), 564 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING), 565 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING), 566 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING), 567 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING), 568 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING), 569 570 /* Special cases */ 571 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE), 572 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE), 573 ASN1_GEN_STR("SET", V_ASN1_SET), 574 /* type modifiers */ 575 /* Explicit tag */ 576 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP), 577 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP), 578 /* Implicit tag */ 579 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP), 580 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP), 581 /* OCTET STRING wrapper */ 582 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP), 583 /* SEQUENCE wrapper */ 584 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP), 585 /* SET wrapper */ 586 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP), 587 /* BIT STRING wrapper */ 588 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP), 589 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT), 590 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT), 591 }; 592 593 if (len == -1) 594 len = strlen(tagstr); 595 596 tntmp = tnst; 597 for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); 598 i++, tntmp++) { 599 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len)) 600 return tntmp->tag; 601 } 602 603 return -1; 604 } 605 606 static ASN1_TYPE * 607 asn1_str2type(const char *str, int format, int utype) 608 { 609 ASN1_TYPE *atmp = NULL; 610 CONF_VALUE vtmp; 611 unsigned char *rdata; 612 long rdlen; 613 int no_unused = 1; 614 615 if (!(atmp = ASN1_TYPE_new())) { 616 ASN1error(ERR_R_MALLOC_FAILURE); 617 return NULL; 618 } 619 620 if (!str) 621 str = ""; 622 623 switch (utype) { 624 625 case V_ASN1_NULL: 626 if (str && *str) { 627 ASN1error(ASN1_R_ILLEGAL_NULL_VALUE); 628 goto bad_form; 629 } 630 break; 631 632 case V_ASN1_BOOLEAN: 633 if (format != ASN1_GEN_FORMAT_ASCII) { 634 ASN1error(ASN1_R_NOT_ASCII_FORMAT); 635 goto bad_form; 636 } 637 vtmp.name = NULL; 638 vtmp.section = NULL; 639 vtmp.value = (char *)str; 640 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) { 641 ASN1error(ASN1_R_ILLEGAL_BOOLEAN); 642 goto bad_str; 643 } 644 break; 645 646 case V_ASN1_INTEGER: 647 case V_ASN1_ENUMERATED: 648 if (format != ASN1_GEN_FORMAT_ASCII) { 649 ASN1error(ASN1_R_INTEGER_NOT_ASCII_FORMAT); 650 goto bad_form; 651 } 652 if (!(atmp->value.integer = 653 s2i_ASN1_INTEGER(NULL, (char *)str))) { 654 ASN1error(ASN1_R_ILLEGAL_INTEGER); 655 goto bad_str; 656 } 657 break; 658 659 case V_ASN1_OBJECT: 660 if (format != ASN1_GEN_FORMAT_ASCII) { 661 ASN1error(ASN1_R_OBJECT_NOT_ASCII_FORMAT); 662 goto bad_form; 663 } 664 if (!(atmp->value.object = OBJ_txt2obj(str, 0))) { 665 ASN1error(ASN1_R_ILLEGAL_OBJECT); 666 goto bad_str; 667 } 668 break; 669 670 case V_ASN1_UTCTIME: 671 case V_ASN1_GENERALIZEDTIME: 672 if (format != ASN1_GEN_FORMAT_ASCII) { 673 ASN1error(ASN1_R_TIME_NOT_ASCII_FORMAT); 674 goto bad_form; 675 } 676 if (!(atmp->value.asn1_string = ASN1_STRING_new())) { 677 ASN1error(ERR_R_MALLOC_FAILURE); 678 goto bad_str; 679 } 680 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) { 681 ASN1error(ERR_R_MALLOC_FAILURE); 682 goto bad_str; 683 } 684 atmp->value.asn1_string->type = utype; 685 if (!ASN1_TIME_check(atmp->value.asn1_string)) { 686 ASN1error(ASN1_R_ILLEGAL_TIME_VALUE); 687 goto bad_str; 688 } 689 break; 690 691 case V_ASN1_BMPSTRING: 692 case V_ASN1_PRINTABLESTRING: 693 case V_ASN1_IA5STRING: 694 case V_ASN1_T61STRING: 695 case V_ASN1_UTF8STRING: 696 case V_ASN1_VISIBLESTRING: 697 case V_ASN1_UNIVERSALSTRING: 698 case V_ASN1_GENERALSTRING: 699 case V_ASN1_NUMERICSTRING: 700 701 if (format == ASN1_GEN_FORMAT_ASCII) 702 format = MBSTRING_ASC; 703 else if (format == ASN1_GEN_FORMAT_UTF8) 704 format = MBSTRING_UTF8; 705 else { 706 ASN1error(ASN1_R_ILLEGAL_FORMAT); 707 goto bad_form; 708 } 709 710 if (ASN1_mbstring_copy(&atmp->value.asn1_string, 711 (unsigned char *)str, -1, format, 712 ASN1_tag2bit(utype)) <= 0) { 713 ASN1error(ERR_R_MALLOC_FAILURE); 714 goto bad_str; 715 } 716 break; 717 718 case V_ASN1_BIT_STRING: 719 case V_ASN1_OCTET_STRING: 720 if (!(atmp->value.asn1_string = ASN1_STRING_new())) { 721 ASN1error(ERR_R_MALLOC_FAILURE); 722 goto bad_form; 723 } 724 725 if (format == ASN1_GEN_FORMAT_HEX) { 726 727 if (!(rdata = string_to_hex((char *)str, &rdlen))) { 728 ASN1error(ASN1_R_ILLEGAL_HEX); 729 goto bad_str; 730 } 731 732 atmp->value.asn1_string->data = rdata; 733 atmp->value.asn1_string->length = rdlen; 734 atmp->value.asn1_string->type = utype; 735 736 } else if (format == ASN1_GEN_FORMAT_ASCII) { 737 if (ASN1_STRING_set(atmp->value.asn1_string, str, 738 -1) == 0) { 739 ASN1error(ERR_R_MALLOC_FAILURE); 740 goto bad_str; 741 } 742 } else if ((format == ASN1_GEN_FORMAT_BITLIST) && 743 (utype == V_ASN1_BIT_STRING)) { 744 if (!CONF_parse_list(str, ',', 1, bitstr_cb, 745 atmp->value.bit_string)) { 746 ASN1error(ASN1_R_LIST_ERROR); 747 goto bad_str; 748 } 749 no_unused = 0; 750 751 } else { 752 ASN1error(ASN1_R_ILLEGAL_BITSTRING_FORMAT); 753 goto bad_form; 754 } 755 756 if ((utype == V_ASN1_BIT_STRING) && no_unused) { 757 atmp->value.asn1_string->flags &= 758 ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); 759 atmp->value.asn1_string->flags |= 760 ASN1_STRING_FLAG_BITS_LEFT; 761 } 762 763 break; 764 765 default: 766 ASN1error(ASN1_R_UNSUPPORTED_TYPE); 767 goto bad_str; 768 break; 769 } 770 771 atmp->type = utype; 772 return atmp; 773 774 bad_str: 775 ERR_asprintf_error_data("string=%s", str); 776 bad_form: 777 ASN1_TYPE_free(atmp); 778 return NULL; 779 } 780 781 static int 782 bitstr_cb(const char *elem, int len, void *bitstr) 783 { 784 long bitnum; 785 char *eptr; 786 787 if (!elem) 788 return 0; 789 bitnum = strtoul(elem, &eptr, 10); 790 if (eptr && *eptr && (eptr != elem + len)) 791 return 0; 792 if (bitnum < 0) { 793 ASN1error(ASN1_R_INVALID_NUMBER); 794 return 0; 795 } 796 if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) { 797 ASN1error(ERR_R_MALLOC_FAILURE); 798 return 0; 799 } 800 return 1; 801 } 802