1 /* $OpenBSD: asn1_gen.c,v 1.12 2014/07/11 08:44:47 jsing 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(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(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; 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 ASN1err(ASN1_F_ASN1_GENERATE_V3, 164 ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG); 165 return NULL; 166 } 167 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf); 168 } else 169 ret = asn1_str2type(asn1_tags.str, asn1_tags.format, 170 asn1_tags.utype); 171 172 if (!ret) 173 return NULL; 174 175 /* If no tagging return base type */ 176 if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0)) 177 return ret; 178 179 /* Generate the encoding */ 180 cpy_len = i2d_ASN1_TYPE(ret, &orig_der); 181 ASN1_TYPE_free(ret); 182 ret = NULL; 183 /* Set point to start copying for modified encoding */ 184 cpy_start = orig_der; 185 186 /* Do we need IMPLICIT tagging? */ 187 if (asn1_tags.imp_tag != -1) { 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, 191 &hdr_class, cpy_len); 192 if (r & 0x80) 193 goto err; 194 /* Update copy length */ 195 cpy_len -= cpy_start - orig_der; 196 /* For IMPLICIT tagging the length should match the 197 * original length and constructed flag should be 198 * consistent. 199 */ 200 if (r & 0x1) { 201 /* Indefinite length constructed */ 202 hdr_constructed = 2; 203 hdr_len = 0; 204 } else 205 /* Just retain constructed flag */ 206 hdr_constructed = r & V_ASN1_CONSTRUCTED; 207 /* Work out new length with IMPLICIT tag: ignore constructed 208 * because it will mess up if indefinite length 209 */ 210 len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag); 211 } else 212 len = cpy_len; 213 214 /* Work out length in any EXPLICIT, starting from end */ 215 216 for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1; 217 i < asn1_tags.exp_count; i++, etmp--) { 218 /* Content length: number of content octets + any padding */ 219 len += etmp->exp_pad; 220 etmp->exp_len = len; 221 /* Total object length: length including new header */ 222 len = ASN1_object_size(0, len, etmp->exp_tag); 223 } 224 225 /* Allocate buffer for new encoding */ 226 227 new_der = malloc(len); 228 if (!new_der) 229 goto err; 230 231 /* Generate tagged encoding */ 232 p = new_der; 233 234 /* Output explicit tags first */ 235 for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count; 236 i++, etmp++) { 237 ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len, 238 etmp->exp_tag, etmp->exp_class); 239 if (etmp->exp_pad) 240 *p++ = 0; 241 } 242 243 /* If IMPLICIT, output tag */ 244 245 if (asn1_tags.imp_tag != -1) { 246 if (asn1_tags.imp_class == V_ASN1_UNIVERSAL && 247 (asn1_tags.imp_tag == V_ASN1_SEQUENCE || 248 asn1_tags.imp_tag == V_ASN1_SET)) 249 hdr_constructed = V_ASN1_CONSTRUCTED; 250 ASN1_put_object(&p, hdr_constructed, hdr_len, 251 asn1_tags.imp_tag, asn1_tags.imp_class); 252 } 253 254 /* Copy across original encoding */ 255 memcpy(p, cpy_start, cpy_len); 256 257 cp = new_der; 258 259 /* Obtain new ASN1_TYPE structure */ 260 ret = d2i_ASN1_TYPE(NULL, &cp, len); 261 262 err: 263 free(orig_der); 264 free(new_der); 265 266 return ret; 267 } 268 269 static int 270 asn1_cb(const char *elem, int len, void *bitstr) 271 { 272 tag_exp_arg *arg = bitstr; 273 int i; 274 int utype; 275 int vlen = 0; 276 const char *p, *vstart = NULL; 277 278 int tmp_tag, tmp_class; 279 280 for (i = 0, p = elem; i < len; p++, i++) { 281 /* Look for the ':' in name value pairs */ 282 if (*p == ':') { 283 vstart = p + 1; 284 vlen = len - (vstart - elem); 285 len = p - elem; 286 break; 287 } 288 } 289 290 utype = asn1_str2tag(elem, len); 291 292 if (utype == -1) { 293 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG); 294 ERR_asprintf_error_data("tag=%s", elem); 295 return -1; 296 } 297 298 /* If this is not a modifier mark end of string and exit */ 299 if (!(utype & ASN1_GEN_FLAG)) { 300 arg->utype = utype; 301 arg->str = vstart; 302 /* If no value and not end of string, error */ 303 if (!vstart && elem[len]) { 304 ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE); 305 return -1; 306 } 307 return 0; 308 } 309 310 switch (utype) { 311 312 case ASN1_GEN_FLAG_IMP: 313 /* Check for illegal multiple IMPLICIT tagging */ 314 if (arg->imp_tag != -1) { 315 ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING); 316 return -1; 317 } 318 if (!parse_tagging(vstart, vlen, &arg->imp_tag, 319 &arg->imp_class)) 320 return -1; 321 break; 322 323 case ASN1_GEN_FLAG_EXP: 324 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class)) 325 return -1; 326 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0)) 327 return -1; 328 break; 329 330 case ASN1_GEN_FLAG_SEQWRAP: 331 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1)) 332 return -1; 333 break; 334 335 case ASN1_GEN_FLAG_SETWRAP: 336 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1)) 337 return -1; 338 break; 339 340 case ASN1_GEN_FLAG_BITWRAP: 341 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1)) 342 return -1; 343 break; 344 345 case ASN1_GEN_FLAG_OCTWRAP: 346 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1)) 347 return -1; 348 break; 349 350 case ASN1_GEN_FLAG_FORMAT: 351 if (!strncmp(vstart, "ASCII", 5)) 352 arg->format = ASN1_GEN_FORMAT_ASCII; 353 else if (!strncmp(vstart, "UTF8", 4)) 354 arg->format = ASN1_GEN_FORMAT_UTF8; 355 else if (!strncmp(vstart, "HEX", 3)) 356 arg->format = ASN1_GEN_FORMAT_HEX; 357 else if (!strncmp(vstart, "BITLIST", 7)) 358 arg->format = ASN1_GEN_FORMAT_BITLIST; 359 else { 360 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT); 361 return -1; 362 } 363 break; 364 365 } 366 367 return 1; 368 } 369 370 static int 371 parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass) 372 { 373 long tag_num; 374 char *eptr; 375 376 if (!vstart) 377 return 0; 378 tag_num = strtoul(vstart, &eptr, 10); 379 /* Check we haven't gone past max length: should be impossible */ 380 if (eptr && *eptr && (eptr > vstart + vlen)) 381 return 0; 382 if (tag_num < 0) { 383 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER); 384 return 0; 385 } 386 *ptag = tag_num; 387 /* If we have non numeric characters, parse them */ 388 if (eptr) 389 vlen -= eptr - vstart; 390 else 391 vlen = 0; 392 if (vlen) { 393 switch (*eptr) { 394 395 case 'U': 396 *pclass = V_ASN1_UNIVERSAL; 397 break; 398 399 case 'A': 400 *pclass = V_ASN1_APPLICATION; 401 break; 402 403 case 'P': 404 *pclass = V_ASN1_PRIVATE; 405 break; 406 407 case 'C': 408 *pclass = V_ASN1_CONTEXT_SPECIFIC; 409 break; 410 411 default: 412 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER); 413 ERR_asprintf_error_data("Char=%c", *eptr); 414 return 0; 415 break; 416 417 } 418 } else 419 *pclass = V_ASN1_CONTEXT_SPECIFIC; 420 421 return 1; 422 423 } 424 425 /* Handle multiple types: SET and SEQUENCE */ 426 427 static ASN1_TYPE * 428 asn1_multi(int utype, const char *section, X509V3_CTX *cnf) 429 { 430 ASN1_TYPE *ret = NULL; 431 STACK_OF(ASN1_TYPE) *sk = NULL; 432 STACK_OF(CONF_VALUE) *sect = NULL; 433 unsigned char *der = NULL; 434 int derlen; 435 int i; 436 sk = sk_ASN1_TYPE_new_null(); 437 if (!sk) 438 goto bad; 439 if (section) { 440 if (!cnf) 441 goto bad; 442 sect = X509V3_get_section(cnf, (char *)section); 443 if (!sect) 444 goto bad; 445 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) { 446 ASN1_TYPE *typ = ASN1_generate_v3( 447 sk_CONF_VALUE_value(sect, i)->value, cnf); 448 if (!typ) 449 goto bad; 450 if (!sk_ASN1_TYPE_push(sk, typ)) 451 goto bad; 452 } 453 } 454 455 /* Now we has a STACK of the components, convert to the correct form */ 456 457 if (utype == V_ASN1_SET) 458 derlen = i2d_ASN1_SET_ANY(sk, &der); 459 else 460 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der); 461 462 if (derlen < 0) 463 goto bad; 464 465 if (!(ret = ASN1_TYPE_new())) 466 goto bad; 467 468 if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype))) 469 goto bad; 470 471 ret->type = utype; 472 473 ret->value.asn1_string->data = der; 474 ret->value.asn1_string->length = derlen; 475 476 der = NULL; 477 478 bad: 479 free(der); 480 if (sk) 481 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free); 482 if (sect) 483 X509V3_section_free(cnf, sect); 484 485 return ret; 486 } 487 488 static int 489 append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, 490 int exp_pad, int imp_ok) 491 { 492 tag_exp_type *exp_tmp; 493 494 /* Can only have IMPLICIT if permitted */ 495 if ((arg->imp_tag != -1) && !imp_ok) { 496 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG); 497 return 0; 498 } 499 500 if (arg->exp_count == ASN1_FLAG_EXP_MAX) { 501 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED); 502 return 0; 503 } 504 505 exp_tmp = &arg->exp_list[arg->exp_count++]; 506 507 /* If IMPLICIT set tag to implicit value then 508 * reset implicit tag since it has been used. 509 */ 510 if (arg->imp_tag != -1) { 511 exp_tmp->exp_tag = arg->imp_tag; 512 exp_tmp->exp_class = arg->imp_class; 513 arg->imp_tag = -1; 514 arg->imp_class = -1; 515 } else { 516 exp_tmp->exp_tag = exp_tag; 517 exp_tmp->exp_class = exp_class; 518 } 519 exp_tmp->exp_constructed = exp_constructed; 520 exp_tmp->exp_pad = exp_pad; 521 522 return 1; 523 } 524 525 static int 526 asn1_str2tag(const char *tagstr, int len) 527 { 528 unsigned int i; 529 static const struct tag_name_st *tntmp, tnst [] = { 530 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN), 531 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN), 532 ASN1_GEN_STR("NULL", V_ASN1_NULL), 533 ASN1_GEN_STR("INT", V_ASN1_INTEGER), 534 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER), 535 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED), 536 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED), 537 ASN1_GEN_STR("OID", V_ASN1_OBJECT), 538 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT), 539 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME), 540 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME), 541 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME), 542 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME), 543 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING), 544 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING), 545 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING), 546 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING), 547 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING), 548 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING), 549 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING), 550 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING), 551 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING), 552 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING), 553 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING), 554 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING), 555 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING), 556 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING), 557 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING), 558 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING), 559 ASN1_GEN_STR("T61", V_ASN1_T61STRING), 560 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING), 561 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING), 562 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING), 563 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING), 564 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING), 565 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING), 566 567 /* Special cases */ 568 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE), 569 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE), 570 ASN1_GEN_STR("SET", V_ASN1_SET), 571 /* type modifiers */ 572 /* Explicit tag */ 573 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP), 574 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP), 575 /* Implicit tag */ 576 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP), 577 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP), 578 /* OCTET STRING wrapper */ 579 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP), 580 /* SEQUENCE wrapper */ 581 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP), 582 /* SET wrapper */ 583 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP), 584 /* BIT STRING wrapper */ 585 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP), 586 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT), 587 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT), 588 }; 589 590 if (len == -1) 591 len = strlen(tagstr); 592 593 tntmp = tnst; 594 for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); 595 i++, tntmp++) { 596 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len)) 597 return tntmp->tag; 598 } 599 600 return -1; 601 } 602 603 static ASN1_TYPE * 604 asn1_str2type(const char *str, int format, int utype) 605 { 606 ASN1_TYPE *atmp = NULL; 607 CONF_VALUE vtmp; 608 unsigned char *rdata; 609 long rdlen; 610 int no_unused = 1; 611 612 if (!(atmp = ASN1_TYPE_new())) { 613 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 614 return NULL; 615 } 616 617 if (!str) 618 str = ""; 619 620 switch (utype) { 621 622 case V_ASN1_NULL: 623 if (str && *str) { 624 ASN1err(ASN1_F_ASN1_STR2TYPE, 625 ASN1_R_ILLEGAL_NULL_VALUE); 626 goto bad_form; 627 } 628 break; 629 630 case V_ASN1_BOOLEAN: 631 if (format != ASN1_GEN_FORMAT_ASCII) { 632 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT); 633 goto bad_form; 634 } 635 vtmp.name = NULL; 636 vtmp.section = NULL; 637 vtmp.value = (char *)str; 638 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) { 639 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN); 640 goto bad_str; 641 } 642 break; 643 644 case V_ASN1_INTEGER: 645 case V_ASN1_ENUMERATED: 646 if (format != ASN1_GEN_FORMAT_ASCII) { 647 ASN1err(ASN1_F_ASN1_STR2TYPE, 648 ASN1_R_INTEGER_NOT_ASCII_FORMAT); 649 goto bad_form; 650 } 651 if (!(atmp->value.integer = 652 s2i_ASN1_INTEGER(NULL, (char *)str))) { 653 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER); 654 goto bad_str; 655 } 656 break; 657 658 case V_ASN1_OBJECT: 659 if (format != ASN1_GEN_FORMAT_ASCII) { 660 ASN1err(ASN1_F_ASN1_STR2TYPE, 661 ASN1_R_OBJECT_NOT_ASCII_FORMAT); 662 goto bad_form; 663 } 664 if (!(atmp->value.object = OBJ_txt2obj(str, 0))) { 665 ASN1err(ASN1_F_ASN1_STR2TYPE, 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 ASN1err(ASN1_F_ASN1_STR2TYPE, 674 ASN1_R_TIME_NOT_ASCII_FORMAT); 675 goto bad_form; 676 } 677 if (!(atmp->value.asn1_string = ASN1_STRING_new())) { 678 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 679 goto bad_str; 680 } 681 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) { 682 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 683 goto bad_str; 684 } 685 atmp->value.asn1_string->type = utype; 686 if (!ASN1_TIME_check(atmp->value.asn1_string)) { 687 ASN1err(ASN1_F_ASN1_STR2TYPE, 688 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 ASN1err(ASN1_F_ASN1_STR2TYPE, 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 ASN1err(ASN1_F_ASN1_STR2TYPE, 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 ASN1err(ASN1_F_ASN1_STR2TYPE, 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 ASN1err(ASN1_F_ASN1_STR2TYPE, 731 ASN1_R_ILLEGAL_HEX); 732 goto bad_str; 733 } 734 735 atmp->value.asn1_string->data = rdata; 736 atmp->value.asn1_string->length = rdlen; 737 atmp->value.asn1_string->type = utype; 738 739 } else if (format == ASN1_GEN_FORMAT_ASCII) 740 ASN1_STRING_set(atmp->value.asn1_string, str, -1); 741 else if ((format == ASN1_GEN_FORMAT_BITLIST) && 742 (utype == V_ASN1_BIT_STRING)) { 743 if (!CONF_parse_list(str, ',', 1, bitstr_cb, 744 atmp->value.bit_string)) { 745 ASN1err(ASN1_F_ASN1_STR2TYPE, 746 ASN1_R_LIST_ERROR); 747 goto bad_str; 748 } 749 no_unused = 0; 750 751 } else { 752 ASN1err(ASN1_F_ASN1_STR2TYPE, 753 ASN1_R_ILLEGAL_BITSTRING_FORMAT); 754 goto bad_form; 755 } 756 757 if ((utype == V_ASN1_BIT_STRING) && no_unused) { 758 atmp->value.asn1_string->flags &= 759 ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); 760 atmp->value.asn1_string->flags |= 761 ASN1_STRING_FLAG_BITS_LEFT; 762 } 763 764 break; 765 766 default: 767 ASN1err(ASN1_F_ASN1_STR2TYPE, 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 ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER); 795 return 0; 796 } 797 if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) { 798 ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE); 799 return 0; 800 } 801 return 1; 802 } 803