1 /* asn1_gen.c */ 2 /* Written by Dr Stephen N Henson (steve (at) 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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh (at) cryptsoft.com). 56 * 57 */ 58 59 #include "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 77 /* Input formats */ 78 79 /* ASCII: default */ 80 #define ASN1_GEN_FORMAT_ASCII 1 81 /* UTF8 */ 82 #define ASN1_GEN_FORMAT_UTF8 2 83 /* Hex */ 84 #define ASN1_GEN_FORMAT_HEX 3 85 /* List of bits */ 86 #define ASN1_GEN_FORMAT_BITLIST 4 87 88 89 struct tag_name_st 90 { 91 const char *strnam; 92 int len; 93 int tag; 94 }; 95 96 typedef struct 97 { 98 int exp_tag; 99 int exp_class; 100 int exp_constructed; 101 int exp_pad; 102 long exp_len; 103 } tag_exp_type; 104 105 typedef struct 106 { 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, int exp_constructed, int exp_pad, int imp_ok); 119 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass); 120 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf); 121 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype); 122 static int asn1_str2tag(const char *tagstr, int len); 123 124 ASN1_TYPE *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 *ASN1_generate_v3(char *str, X509V3_CTX *cnf) 136 { 137 ASN1_TYPE *ret; 138 tag_exp_arg asn1_tags; 139 tag_exp_type *etmp; 140 141 int i, len; 142 143 unsigned char *orig_der = NULL, *new_der = NULL; 144 const unsigned char *cpy_start; 145 unsigned char *p; 146 const unsigned char *cp; 147 int cpy_len; 148 long hdr_len; 149 int hdr_constructed = 0, hdr_tag, hdr_class; 150 int r; 151 152 asn1_tags.imp_tag = -1; 153 asn1_tags.imp_class = -1; 154 asn1_tags.format = ASN1_GEN_FORMAT_ASCII; 155 asn1_tags.exp_count = 0; 156 if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0) 157 return NULL; 158 159 if ((asn1_tags.utype == V_ASN1_SEQUENCE) || (asn1_tags.utype == V_ASN1_SET)) 160 { 161 if (!cnf) 162 { 163 ASN1err(ASN1_F_ASN1_GENERATE_V3, ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG); 164 return NULL; 165 } 166 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf); 167 } 168 else 169 ret = asn1_str2type(asn1_tags.str, asn1_tags.format, 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 { 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, &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 { 201 /* Indefinite length constructed */ 202 hdr_constructed = 2; 203 hdr_len = 0; 204 } 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 } 213 else 214 len = cpy_len; 215 216 /* Work out length in any EXPLICIT, starting from end */ 217 218 for(i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1; i < asn1_tags.exp_count; i++, etmp--) 219 { 220 /* Content length: number of content octets + any padding */ 221 len += etmp->exp_pad; 222 etmp->exp_len = len; 223 /* Total object length: length including new header */ 224 len = ASN1_object_size(0, len, etmp->exp_tag); 225 } 226 227 /* Allocate buffer for new encoding */ 228 229 new_der = OPENSSL_malloc(len); 230 if (!new_der) 231 goto err; 232 233 /* Generate tagged encoding */ 234 235 p = new_der; 236 237 /* Output explicit tags first */ 238 239 for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count; i++, etmp++) 240 { 241 ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len, 242 etmp->exp_tag, etmp->exp_class); 243 if (etmp->exp_pad) 244 *p++ = 0; 245 } 246 247 /* If IMPLICIT, output tag */ 248 249 if (asn1_tags.imp_tag != -1) 250 ASN1_put_object(&p, hdr_constructed, hdr_len, 251 asn1_tags.imp_tag, asn1_tags.imp_class); 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 if (orig_der) 263 OPENSSL_free(orig_der); 264 if (new_der) 265 OPENSSL_free(new_der); 266 267 return ret; 268 269 } 270 271 static int 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 { 283 /* Look for the ':' in name value pairs */ 284 if (*p == ':') 285 { 286 vstart = p + 1; 287 vlen = len - (vstart - elem); 288 len = p - elem; 289 break; 290 } 291 } 292 293 utype = asn1_str2tag(elem, len); 294 295 if (utype == -1) 296 { 297 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG); 298 ERR_add_error_data(2, "tag=", elem); 299 return -1; 300 } 301 302 /* If this is not a modifier mark end of string and exit */ 303 if (!(utype & ASN1_GEN_FLAG)) 304 { 305 arg->utype = utype; 306 arg->str = vstart; 307 /* If no value and not end of string, error */ 308 if (!vstart && elem[len]) 309 { 310 ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE); 311 return -1; 312 } 313 return 0; 314 } 315 316 switch(utype) 317 { 318 319 case ASN1_GEN_FLAG_IMP: 320 /* Check for illegal multiple IMPLICIT tagging */ 321 if (arg->imp_tag != -1) 322 { 323 ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING); 324 return -1; 325 } 326 if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class)) 327 return -1; 328 break; 329 330 case ASN1_GEN_FLAG_EXP: 331 332 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class)) 333 return -1; 334 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0)) 335 return -1; 336 break; 337 338 case ASN1_GEN_FLAG_SEQWRAP: 339 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1)) 340 return -1; 341 break; 342 343 case ASN1_GEN_FLAG_SETWRAP: 344 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1)) 345 return -1; 346 break; 347 348 case ASN1_GEN_FLAG_BITWRAP: 349 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1)) 350 return -1; 351 break; 352 353 case ASN1_GEN_FLAG_OCTWRAP: 354 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1)) 355 return -1; 356 break; 357 358 case ASN1_GEN_FLAG_FORMAT: 359 if (!strncmp(vstart, "ASCII", 5)) 360 arg->format = ASN1_GEN_FORMAT_ASCII; 361 else if (!strncmp(vstart, "UTF8", 4)) 362 arg->format = ASN1_GEN_FORMAT_UTF8; 363 else if (!strncmp(vstart, "HEX", 3)) 364 arg->format = ASN1_GEN_FORMAT_HEX; 365 else if (!strncmp(vstart, "BITLIST", 3)) 366 arg->format = ASN1_GEN_FORMAT_BITLIST; 367 else 368 { 369 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT); 370 return -1; 371 } 372 break; 373 374 } 375 376 return 1; 377 378 } 379 380 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass) 381 { 382 char erch[2]; 383 long tag_num; 384 char *eptr; 385 if (!vstart) 386 return 0; 387 tag_num = strtoul(vstart, &eptr, 10); 388 /* Check we haven't gone past max length: should be impossible */ 389 if (eptr && *eptr && (eptr > vstart + vlen)) 390 return 0; 391 if (tag_num < 0) 392 { 393 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER); 394 return 0; 395 } 396 *ptag = tag_num; 397 /* If we have non numeric characters, parse them */ 398 if (eptr) 399 vlen -= eptr - vstart; 400 else 401 vlen = 0; 402 if (vlen) 403 { 404 switch (*eptr) 405 { 406 407 case 'U': 408 *pclass = V_ASN1_UNIVERSAL; 409 break; 410 411 case 'A': 412 *pclass = V_ASN1_APPLICATION; 413 break; 414 415 case 'P': 416 *pclass = V_ASN1_PRIVATE; 417 break; 418 419 case 'C': 420 *pclass = V_ASN1_CONTEXT_SPECIFIC; 421 break; 422 423 default: 424 erch[0] = *eptr; 425 erch[1] = 0; 426 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER); 427 ERR_add_error_data(2, "Char=", erch); 428 return 0; 429 break; 430 431 } 432 } 433 else 434 *pclass = V_ASN1_CONTEXT_SPECIFIC; 435 436 return 1; 437 438 } 439 440 /* Handle multiple types: SET and SEQUENCE */ 441 442 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf) 443 { 444 ASN1_TYPE *ret = NULL, *typ = NULL; 445 STACK_OF(ASN1_TYPE) *sk = NULL; 446 STACK_OF(CONF_VALUE) *sect = NULL; 447 unsigned char *der = NULL, *p; 448 int derlen; 449 int i, is_set; 450 sk = sk_ASN1_TYPE_new_null(); 451 if (!sk) 452 goto bad; 453 if (section) 454 { 455 if (!cnf) 456 goto bad; 457 sect = X509V3_get_section(cnf, (char *)section); 458 if (!sect) 459 goto bad; 460 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) 461 { 462 typ = ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf); 463 if (!typ) 464 goto bad; 465 if (!sk_ASN1_TYPE_push(sk, typ)) 466 goto bad; 467 typ = NULL; 468 } 469 } 470 471 /* Now we has a STACK of the components, convert to the correct form */ 472 473 if (utype == V_ASN1_SET) 474 is_set = 1; 475 else 476 is_set = 0; 477 478 479 derlen = i2d_ASN1_SET_OF_ASN1_TYPE(sk, NULL, i2d_ASN1_TYPE, utype, 480 V_ASN1_UNIVERSAL, is_set); 481 der = OPENSSL_malloc(derlen); 482 if (!der) 483 goto bad; 484 p = der; 485 i2d_ASN1_SET_OF_ASN1_TYPE(sk, &p, i2d_ASN1_TYPE, utype, 486 V_ASN1_UNIVERSAL, is_set); 487 488 if (!(ret = ASN1_TYPE_new())) 489 goto bad; 490 491 if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype))) 492 goto bad; 493 494 ret->type = utype; 495 496 ret->value.asn1_string->data = der; 497 ret->value.asn1_string->length = derlen; 498 499 der = NULL; 500 501 bad: 502 503 if (der) 504 OPENSSL_free(der); 505 506 if (sk) 507 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free); 508 if (typ) 509 ASN1_TYPE_free(typ); 510 if (sect) 511 X509V3_section_free(cnf, sect); 512 513 return ret; 514 } 515 516 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, 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 { 522 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG); 523 return 0; 524 } 525 526 if (arg->exp_count == ASN1_FLAG_EXP_MAX) 527 { 528 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED); 529 return 0; 530 } 531 532 exp_tmp = &arg->exp_list[arg->exp_count++]; 533 534 /* If IMPLICIT set tag to implicit value then 535 * reset implicit tag since it has been used. 536 */ 537 if (arg->imp_tag != -1) 538 { 539 exp_tmp->exp_tag = arg->imp_tag; 540 exp_tmp->exp_class = arg->imp_class; 541 arg->imp_tag = -1; 542 arg->imp_class = -1; 543 } 544 else 545 { 546 exp_tmp->exp_tag = exp_tag; 547 exp_tmp->exp_class = exp_class; 548 } 549 exp_tmp->exp_constructed = exp_constructed; 550 exp_tmp->exp_pad = exp_pad; 551 552 return 1; 553 } 554 555 556 static int asn1_str2tag(const char *tagstr, int len) 557 { 558 unsigned int i; 559 static struct tag_name_st *tntmp, tnst [] = { 560 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN), 561 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN), 562 ASN1_GEN_STR("NULL", V_ASN1_NULL), 563 ASN1_GEN_STR("INT", V_ASN1_INTEGER), 564 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER), 565 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED), 566 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED), 567 ASN1_GEN_STR("OID", V_ASN1_OBJECT), 568 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT), 569 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME), 570 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME), 571 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME), 572 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME), 573 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING), 574 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING), 575 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING), 576 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING), 577 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING), 578 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING), 579 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING), 580 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING), 581 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING), 582 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING), 583 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING), 584 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING), 585 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING), 586 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING), 587 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING), 588 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING), 589 ASN1_GEN_STR("T61", V_ASN1_T61STRING), 590 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING), 591 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING), 592 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING), 593 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING), 594 595 /* Special cases */ 596 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE), 597 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE), 598 ASN1_GEN_STR("SET", V_ASN1_SET), 599 /* type modifiers */ 600 /* Explicit tag */ 601 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP), 602 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP), 603 /* Implicit tag */ 604 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP), 605 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP), 606 /* OCTET STRING wrapper */ 607 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP), 608 /* SEQUENCE wrapper */ 609 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP), 610 /* SET wrapper */ 611 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP), 612 /* BIT STRING wrapper */ 613 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP), 614 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT), 615 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT), 616 }; 617 618 if (len == -1) 619 len = strlen(tagstr); 620 621 tntmp = tnst; 622 for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++) 623 { 624 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len)) 625 return tntmp->tag; 626 } 627 628 return -1; 629 } 630 631 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype) 632 { 633 ASN1_TYPE *atmp = NULL; 634 635 CONF_VALUE vtmp; 636 637 unsigned char *rdata; 638 long rdlen; 639 640 int no_unused = 1; 641 642 if (!(atmp = ASN1_TYPE_new())) 643 { 644 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 645 return NULL; 646 } 647 648 if (!str) 649 str = ""; 650 651 switch(utype) 652 { 653 654 case V_ASN1_NULL: 655 if (str && *str) 656 { 657 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE); 658 goto bad_form; 659 } 660 break; 661 662 case V_ASN1_BOOLEAN: 663 if (format != ASN1_GEN_FORMAT_ASCII) 664 { 665 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT); 666 goto bad_form; 667 } 668 vtmp.name = NULL; 669 vtmp.section = NULL; 670 vtmp.value = (char *)str; 671 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) 672 { 673 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN); 674 goto bad_str; 675 } 676 break; 677 678 case V_ASN1_INTEGER: 679 case V_ASN1_ENUMERATED: 680 if (format != ASN1_GEN_FORMAT_ASCII) 681 { 682 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT); 683 goto bad_form; 684 } 685 if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str))) 686 { 687 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER); 688 goto bad_str; 689 } 690 break; 691 692 case V_ASN1_OBJECT: 693 if (format != ASN1_GEN_FORMAT_ASCII) 694 { 695 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT); 696 goto bad_form; 697 } 698 if (!(atmp->value.object = OBJ_txt2obj(str, 0))) 699 { 700 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT); 701 goto bad_str; 702 } 703 break; 704 705 case V_ASN1_UTCTIME: 706 case V_ASN1_GENERALIZEDTIME: 707 if (format != ASN1_GEN_FORMAT_ASCII) 708 { 709 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT); 710 goto bad_form; 711 } 712 if (!(atmp->value.asn1_string = ASN1_STRING_new())) 713 { 714 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 715 goto bad_str; 716 } 717 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) 718 { 719 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 720 goto bad_str; 721 } 722 atmp->value.asn1_string->type = utype; 723 if (!ASN1_TIME_check(atmp->value.asn1_string)) 724 { 725 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE); 726 goto bad_str; 727 } 728 729 break; 730 731 case V_ASN1_BMPSTRING: 732 case V_ASN1_PRINTABLESTRING: 733 case V_ASN1_IA5STRING: 734 case V_ASN1_T61STRING: 735 case V_ASN1_UTF8STRING: 736 case V_ASN1_VISIBLESTRING: 737 case V_ASN1_UNIVERSALSTRING: 738 case V_ASN1_GENERALSTRING: 739 740 if (format == ASN1_GEN_FORMAT_ASCII) 741 format = MBSTRING_ASC; 742 else if (format == ASN1_GEN_FORMAT_UTF8) 743 format = MBSTRING_UTF8; 744 else 745 { 746 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT); 747 goto bad_form; 748 } 749 750 751 if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str, 752 -1, format, ASN1_tag2bit(utype)) <= 0) 753 { 754 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 755 goto bad_str; 756 } 757 758 759 break; 760 761 case V_ASN1_BIT_STRING: 762 763 case V_ASN1_OCTET_STRING: 764 765 if (!(atmp->value.asn1_string = ASN1_STRING_new())) 766 { 767 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 768 goto bad_form; 769 } 770 771 if (format == ASN1_GEN_FORMAT_HEX) 772 { 773 774 if (!(rdata = string_to_hex((char *)str, &rdlen))) 775 { 776 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX); 777 goto bad_str; 778 } 779 780 atmp->value.asn1_string->data = rdata; 781 atmp->value.asn1_string->length = rdlen; 782 atmp->value.asn1_string->type = utype; 783 784 } 785 else if (format == ASN1_GEN_FORMAT_ASCII) 786 ASN1_STRING_set(atmp->value.asn1_string, str, -1); 787 else if ((format == ASN1_GEN_FORMAT_BITLIST) && (utype == V_ASN1_BIT_STRING)) 788 { 789 if (!CONF_parse_list(str, ',', 1, bitstr_cb, atmp->value.bit_string)) 790 { 791 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR); 792 goto bad_str; 793 } 794 no_unused = 0; 795 796 } 797 else 798 { 799 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT); 800 goto bad_form; 801 } 802 803 if ((utype == V_ASN1_BIT_STRING) && no_unused) 804 { 805 atmp->value.asn1_string->flags 806 &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); 807 atmp->value.asn1_string->flags 808 |= ASN1_STRING_FLAG_BITS_LEFT; 809 } 810 811 812 break; 813 814 default: 815 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE); 816 goto bad_str; 817 break; 818 } 819 820 821 atmp->type = utype; 822 return atmp; 823 824 825 bad_str: 826 ERR_add_error_data(2, "string=", str); 827 bad_form: 828 829 ASN1_TYPE_free(atmp); 830 return NULL; 831 832 } 833 834 static int bitstr_cb(const char *elem, int len, void *bitstr) 835 { 836 long bitnum; 837 char *eptr; 838 if (!elem) 839 return 0; 840 bitnum = strtoul(elem, &eptr, 10); 841 if (eptr && *eptr && (eptr != elem + len)) 842 return 0; 843 if (bitnum < 0) 844 { 845 ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER); 846 return 0; 847 } 848 if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) 849 { 850 ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE); 851 return 0; 852 } 853 return 1; 854 } 855 856
