1 /* $OpenBSD: asn1_gen.c,v 1.14 2015/07/18 14:40:59 miod 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 = 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 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 (vstart == NULL) { 352 ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_FORMAT); 353 return -1; 354 } 355 if (!strncmp(vstart, "ASCII", 5)) 356 arg->format = ASN1_GEN_FORMAT_ASCII; 357 else if (!strncmp(vstart, "UTF8", 4)) 358 arg->format = ASN1_GEN_FORMAT_UTF8; 359 else if (!strncmp(vstart, "HEX", 3)) 360 arg->format = ASN1_GEN_FORMAT_HEX; 361 else if (!strncmp(vstart, "BITLIST", 7)) 362 arg->format = ASN1_GEN_FORMAT_BITLIST; 363 else { 364 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT); 365 return -1; 366 } 367 break; 368 369 } 370 371 return 1; 372 } 373 374 static int 375 parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass) 376 { 377 long tag_num; 378 char *eptr; 379 380 if (!vstart) 381 return 0; 382 tag_num = strtoul(vstart, &eptr, 10); 383 /* Check we haven't gone past max length: should be impossible */ 384 if (eptr && *eptr && (eptr > vstart + vlen)) 385 return 0; 386 if (tag_num < 0) { 387 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER); 388 return 0; 389 } 390 *ptag = tag_num; 391 /* If we have non numeric characters, parse them */ 392 if (eptr) 393 vlen -= eptr - vstart; 394 else 395 vlen = 0; 396 if (vlen) { 397 switch (*eptr) { 398 399 case 'U': 400 *pclass = V_ASN1_UNIVERSAL; 401 break; 402 403 case 'A': 404 *pclass = V_ASN1_APPLICATION; 405 break; 406 407 case 'P': 408 *pclass = V_ASN1_PRIVATE; 409 break; 410 411 case 'C': 412 *pclass = V_ASN1_CONTEXT_SPECIFIC; 413 break; 414 415 default: 416 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER); 417 ERR_asprintf_error_data("Char=%c", *eptr); 418 return 0; 419 break; 420 421 } 422 } else 423 *pclass = V_ASN1_CONTEXT_SPECIFIC; 424 425 return 1; 426 427 } 428 429 /* Handle multiple types: SET and SEQUENCE */ 430 431 static ASN1_TYPE * 432 asn1_multi(int utype, const char *section, X509V3_CTX *cnf) 433 { 434 ASN1_TYPE *ret = NULL; 435 STACK_OF(ASN1_TYPE) *sk = NULL; 436 STACK_OF(CONF_VALUE) *sect = NULL; 437 unsigned char *der = NULL; 438 int derlen; 439 int i; 440 sk = sk_ASN1_TYPE_new_null(); 441 if (!sk) 442 goto bad; 443 if (section) { 444 if (!cnf) 445 goto bad; 446 sect = X509V3_get_section(cnf, (char *)section); 447 if (!sect) 448 goto bad; 449 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) { 450 ASN1_TYPE *typ = ASN1_generate_v3( 451 sk_CONF_VALUE_value(sect, i)->value, cnf); 452 if (!typ) 453 goto bad; 454 if (!sk_ASN1_TYPE_push(sk, typ)) 455 goto bad; 456 } 457 } 458 459 /* Now we has a STACK of the components, convert to the correct form */ 460 461 if (utype == V_ASN1_SET) 462 derlen = i2d_ASN1_SET_ANY(sk, &der); 463 else 464 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der); 465 466 if (derlen < 0) 467 goto bad; 468 469 if (!(ret = ASN1_TYPE_new())) 470 goto bad; 471 472 if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype))) 473 goto bad; 474 475 ret->type = utype; 476 477 ret->value.asn1_string->data = der; 478 ret->value.asn1_string->length = derlen; 479 480 der = NULL; 481 482 bad: 483 free(der); 484 if (sk) 485 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free); 486 if (sect) 487 X509V3_section_free(cnf, sect); 488 489 return ret; 490 } 491 492 static int 493 append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, 494 int exp_pad, int imp_ok) 495 { 496 tag_exp_type *exp_tmp; 497 498 /* Can only have IMPLICIT if permitted */ 499 if ((arg->imp_tag != -1) && !imp_ok) { 500 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG); 501 return 0; 502 } 503 504 if (arg->exp_count == ASN1_FLAG_EXP_MAX) { 505 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED); 506 return 0; 507 } 508 509 exp_tmp = &arg->exp_list[arg->exp_count++]; 510 511 /* If IMPLICIT set tag to implicit value then 512 * reset implicit tag since it has been used. 513 */ 514 if (arg->imp_tag != -1) { 515 exp_tmp->exp_tag = arg->imp_tag; 516 exp_tmp->exp_class = arg->imp_class; 517 arg->imp_tag = -1; 518 arg->imp_class = -1; 519 } else { 520 exp_tmp->exp_tag = exp_tag; 521 exp_tmp->exp_class = exp_class; 522 } 523 exp_tmp->exp_constructed = exp_constructed; 524 exp_tmp->exp_pad = exp_pad; 525 526 return 1; 527 } 528 529 static int 530 asn1_str2tag(const char *tagstr, int len) 531 { 532 unsigned int i; 533 static const struct tag_name_st *tntmp, tnst [] = { 534 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN), 535 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN), 536 ASN1_GEN_STR("NULL", V_ASN1_NULL), 537 ASN1_GEN_STR("INT", V_ASN1_INTEGER), 538 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER), 539 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED), 540 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED), 541 ASN1_GEN_STR("OID", V_ASN1_OBJECT), 542 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT), 543 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME), 544 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME), 545 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME), 546 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME), 547 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING), 548 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING), 549 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING), 550 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING), 551 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING), 552 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING), 553 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING), 554 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING), 555 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING), 556 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING), 557 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING), 558 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING), 559 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING), 560 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING), 561 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING), 562 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING), 563 ASN1_GEN_STR("T61", V_ASN1_T61STRING), 564 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING), 565 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING), 566 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING), 567 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING), 568 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING), 569 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING), 570 571 /* Special cases */ 572 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE), 573 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE), 574 ASN1_GEN_STR("SET", V_ASN1_SET), 575 /* type modifiers */ 576 /* Explicit tag */ 577 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP), 578 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP), 579 /* Implicit tag */ 580 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP), 581 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP), 582 /* OCTET STRING wrapper */ 583 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP), 584 /* SEQUENCE wrapper */ 585 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP), 586 /* SET wrapper */ 587 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP), 588 /* BIT STRING wrapper */ 589 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP), 590 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT), 591 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT), 592 }; 593 594 if (len == -1) 595 len = strlen(tagstr); 596 597 tntmp = tnst; 598 for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); 599 i++, tntmp++) { 600 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len)) 601 return tntmp->tag; 602 } 603 604 return -1; 605 } 606 607 static ASN1_TYPE * 608 asn1_str2type(const char *str, int format, int utype) 609 { 610 ASN1_TYPE *atmp = NULL; 611 CONF_VALUE vtmp; 612 unsigned char *rdata; 613 long rdlen; 614 int no_unused = 1; 615 616 if (!(atmp = ASN1_TYPE_new())) { 617 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 618 return NULL; 619 } 620 621 if (!str) 622 str = ""; 623 624 switch (utype) { 625 626 case V_ASN1_NULL: 627 if (str && *str) { 628 ASN1err(ASN1_F_ASN1_STR2TYPE, 629 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 ASN1err(ASN1_F_ASN1_STR2TYPE, 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 ASN1err(ASN1_F_ASN1_STR2TYPE, 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 ASN1err(ASN1_F_ASN1_STR2TYPE, 652 ASN1_R_INTEGER_NOT_ASCII_FORMAT); 653 goto bad_form; 654 } 655 if (!(atmp->value.integer = 656 s2i_ASN1_INTEGER(NULL, (char *)str))) { 657 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER); 658 goto bad_str; 659 } 660 break; 661 662 case V_ASN1_OBJECT: 663 if (format != ASN1_GEN_FORMAT_ASCII) { 664 ASN1err(ASN1_F_ASN1_STR2TYPE, 665 ASN1_R_OBJECT_NOT_ASCII_FORMAT); 666 goto bad_form; 667 } 668 if (!(atmp->value.object = OBJ_txt2obj(str, 0))) { 669 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT); 670 goto bad_str; 671 } 672 break; 673 674 case V_ASN1_UTCTIME: 675 case V_ASN1_GENERALIZEDTIME: 676 if (format != ASN1_GEN_FORMAT_ASCII) { 677 ASN1err(ASN1_F_ASN1_STR2TYPE, 678 ASN1_R_TIME_NOT_ASCII_FORMAT); 679 goto bad_form; 680 } 681 if (!(atmp->value.asn1_string = ASN1_STRING_new())) { 682 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 683 goto bad_str; 684 } 685 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) { 686 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 687 goto bad_str; 688 } 689 atmp->value.asn1_string->type = utype; 690 if (!ASN1_TIME_check(atmp->value.asn1_string)) { 691 ASN1err(ASN1_F_ASN1_STR2TYPE, 692 ASN1_R_ILLEGAL_TIME_VALUE); 693 goto bad_str; 694 } 695 break; 696 697 case V_ASN1_BMPSTRING: 698 case V_ASN1_PRINTABLESTRING: 699 case V_ASN1_IA5STRING: 700 case V_ASN1_T61STRING: 701 case V_ASN1_UTF8STRING: 702 case V_ASN1_VISIBLESTRING: 703 case V_ASN1_UNIVERSALSTRING: 704 case V_ASN1_GENERALSTRING: 705 case V_ASN1_NUMERICSTRING: 706 707 if (format == ASN1_GEN_FORMAT_ASCII) 708 format = MBSTRING_ASC; 709 else if (format == ASN1_GEN_FORMAT_UTF8) 710 format = MBSTRING_UTF8; 711 else { 712 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT); 713 goto bad_form; 714 } 715 716 if (ASN1_mbstring_copy(&atmp->value.asn1_string, 717 (unsigned char *)str, -1, format, 718 ASN1_tag2bit(utype)) <= 0) { 719 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 720 goto bad_str; 721 } 722 break; 723 724 case V_ASN1_BIT_STRING: 725 case V_ASN1_OCTET_STRING: 726 if (!(atmp->value.asn1_string = ASN1_STRING_new())) { 727 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 728 goto bad_form; 729 } 730 731 if (format == ASN1_GEN_FORMAT_HEX) { 732 733 if (!(rdata = string_to_hex((char *)str, &rdlen))) { 734 ASN1err(ASN1_F_ASN1_STR2TYPE, 735 ASN1_R_ILLEGAL_HEX); 736 goto bad_str; 737 } 738 739 atmp->value.asn1_string->data = rdata; 740 atmp->value.asn1_string->length = rdlen; 741 atmp->value.asn1_string->type = utype; 742 743 } else if (format == ASN1_GEN_FORMAT_ASCII) { 744 if (ASN1_STRING_set(atmp->value.asn1_string, str, 745 -1) == 0) { 746 ASN1err(ASN1_F_ASN1_STR2TYPE, 747 ERR_R_MALLOC_FAILURE); 748 goto bad_str; 749 } 750 } else if ((format == ASN1_GEN_FORMAT_BITLIST) && 751 (utype == V_ASN1_BIT_STRING)) { 752 if (!CONF_parse_list(str, ',', 1, bitstr_cb, 753 atmp->value.bit_string)) { 754 ASN1err(ASN1_F_ASN1_STR2TYPE, 755 ASN1_R_LIST_ERROR); 756 goto bad_str; 757 } 758 no_unused = 0; 759 760 } else { 761 ASN1err(ASN1_F_ASN1_STR2TYPE, 762 ASN1_R_ILLEGAL_BITSTRING_FORMAT); 763 goto bad_form; 764 } 765 766 if ((utype == V_ASN1_BIT_STRING) && no_unused) { 767 atmp->value.asn1_string->flags &= 768 ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); 769 atmp->value.asn1_string->flags |= 770 ASN1_STRING_FLAG_BITS_LEFT; 771 } 772 773 break; 774 775 default: 776 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE); 777 goto bad_str; 778 break; 779 } 780 781 atmp->type = utype; 782 return atmp; 783 784 bad_str: 785 ERR_asprintf_error_data("string=%s", str); 786 bad_form: 787 ASN1_TYPE_free(atmp); 788 return NULL; 789 } 790 791 static int 792 bitstr_cb(const char *elem, int len, void *bitstr) 793 { 794 long bitnum; 795 char *eptr; 796 797 if (!elem) 798 return 0; 799 bitnum = strtoul(elem, &eptr, 10); 800 if (eptr && *eptr && (eptr != elem + len)) 801 return 0; 802 if (bitnum < 0) { 803 ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER); 804 return 0; 805 } 806 if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) { 807 ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE); 808 return 0; 809 } 810 return 1; 811 } 812