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 { 251 if (asn1_tags.imp_class == V_ASN1_UNIVERSAL 252 && (asn1_tags.imp_tag == V_ASN1_SEQUENCE 253 || asn1_tags.imp_tag == V_ASN1_SET) ) 254 hdr_constructed = V_ASN1_CONSTRUCTED; 255 ASN1_put_object(&p, hdr_constructed, hdr_len, 256 asn1_tags.imp_tag, asn1_tags.imp_class); 257 } 258 259 /* Copy across original encoding */ 260 memcpy(p, cpy_start, cpy_len); 261 262 cp = new_der; 263 264 /* Obtain new ASN1_TYPE structure */ 265 ret = d2i_ASN1_TYPE(NULL, &cp, len); 266 267 err: 268 if (orig_der) 269 OPENSSL_free(orig_der); 270 if (new_der) 271 OPENSSL_free(new_der); 272 273 return ret; 274 275 } 276 277 static int asn1_cb(const char *elem, int len, void *bitstr) 278 { 279 tag_exp_arg *arg = bitstr; 280 int i; 281 int utype; 282 int vlen = 0; 283 const char *p, *vstart = NULL; 284 285 int tmp_tag, tmp_class; 286 287 for(i = 0, p = elem; i < len; p++, i++) 288 { 289 /* Look for the ':' in name value pairs */ 290 if (*p == ':') 291 { 292 vstart = p + 1; 293 vlen = len - (vstart - elem); 294 len = p - elem; 295 break; 296 } 297 } 298 299 utype = asn1_str2tag(elem, len); 300 301 if (utype == -1) 302 { 303 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKNOWN_TAG); 304 ERR_add_error_data(2, "tag=", elem); 305 return -1; 306 } 307 308 /* If this is not a modifier mark end of string and exit */ 309 if (!(utype & ASN1_GEN_FLAG)) 310 { 311 arg->utype = utype; 312 arg->str = vstart; 313 /* If no value and not end of string, error */ 314 if (!vstart && elem[len]) 315 { 316 ASN1err(ASN1_F_ASN1_CB, ASN1_R_MISSING_VALUE); 317 return -1; 318 } 319 return 0; 320 } 321 322 switch(utype) 323 { 324 325 case ASN1_GEN_FLAG_IMP: 326 /* Check for illegal multiple IMPLICIT tagging */ 327 if (arg->imp_tag != -1) 328 { 329 ASN1err(ASN1_F_ASN1_CB, ASN1_R_ILLEGAL_NESTED_TAGGING); 330 return -1; 331 } 332 if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class)) 333 return -1; 334 break; 335 336 case ASN1_GEN_FLAG_EXP: 337 338 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class)) 339 return -1; 340 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0)) 341 return -1; 342 break; 343 344 case ASN1_GEN_FLAG_SEQWRAP: 345 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1)) 346 return -1; 347 break; 348 349 case ASN1_GEN_FLAG_SETWRAP: 350 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1)) 351 return -1; 352 break; 353 354 case ASN1_GEN_FLAG_BITWRAP: 355 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1)) 356 return -1; 357 break; 358 359 case ASN1_GEN_FLAG_OCTWRAP: 360 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1)) 361 return -1; 362 break; 363 364 case ASN1_GEN_FLAG_FORMAT: 365 if (!strncmp(vstart, "ASCII", 5)) 366 arg->format = ASN1_GEN_FORMAT_ASCII; 367 else if (!strncmp(vstart, "UTF8", 4)) 368 arg->format = ASN1_GEN_FORMAT_UTF8; 369 else if (!strncmp(vstart, "HEX", 3)) 370 arg->format = ASN1_GEN_FORMAT_HEX; 371 else if (!strncmp(vstart, "BITLIST", 3)) 372 arg->format = ASN1_GEN_FORMAT_BITLIST; 373 else 374 { 375 ASN1err(ASN1_F_ASN1_CB, ASN1_R_UNKOWN_FORMAT); 376 return -1; 377 } 378 break; 379 380 } 381 382 return 1; 383 384 } 385 386 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass) 387 { 388 char erch[2]; 389 long tag_num; 390 char *eptr; 391 if (!vstart) 392 return 0; 393 tag_num = strtoul(vstart, &eptr, 10); 394 /* Check we haven't gone past max length: should be impossible */ 395 if (eptr && *eptr && (eptr > vstart + vlen)) 396 return 0; 397 if (tag_num < 0) 398 { 399 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_NUMBER); 400 return 0; 401 } 402 *ptag = tag_num; 403 /* If we have non numeric characters, parse them */ 404 if (eptr) 405 vlen -= eptr - vstart; 406 else 407 vlen = 0; 408 if (vlen) 409 { 410 switch (*eptr) 411 { 412 413 case 'U': 414 *pclass = V_ASN1_UNIVERSAL; 415 break; 416 417 case 'A': 418 *pclass = V_ASN1_APPLICATION; 419 break; 420 421 case 'P': 422 *pclass = V_ASN1_PRIVATE; 423 break; 424 425 case 'C': 426 *pclass = V_ASN1_CONTEXT_SPECIFIC; 427 break; 428 429 default: 430 erch[0] = *eptr; 431 erch[1] = 0; 432 ASN1err(ASN1_F_PARSE_TAGGING, ASN1_R_INVALID_MODIFIER); 433 ERR_add_error_data(2, "Char=", erch); 434 return 0; 435 break; 436 437 } 438 } 439 else 440 *pclass = V_ASN1_CONTEXT_SPECIFIC; 441 442 return 1; 443 444 } 445 446 /* Handle multiple types: SET and SEQUENCE */ 447 448 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf) 449 { 450 ASN1_TYPE *ret = NULL; 451 STACK_OF(ASN1_TYPE) *sk = NULL; 452 STACK_OF(CONF_VALUE) *sect = NULL; 453 unsigned char *der = NULL; 454 int derlen; 455 int i; 456 sk = sk_ASN1_TYPE_new_null(); 457 if (!sk) 458 goto bad; 459 if (section) 460 { 461 if (!cnf) 462 goto bad; 463 sect = X509V3_get_section(cnf, (char *)section); 464 if (!sect) 465 goto bad; 466 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) 467 { 468 ASN1_TYPE *typ = ASN1_generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf); 469 if (!typ) 470 goto bad; 471 if (!sk_ASN1_TYPE_push(sk, typ)) 472 goto bad; 473 } 474 } 475 476 /* Now we has a STACK of the components, convert to the correct form */ 477 478 if (utype == V_ASN1_SET) 479 derlen = i2d_ASN1_SET_ANY(sk, &der); 480 else 481 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der); 482 483 if (derlen < 0) 484 goto bad; 485 486 if (!(ret = ASN1_TYPE_new())) 487 goto bad; 488 489 if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype))) 490 goto bad; 491 492 ret->type = utype; 493 494 ret->value.asn1_string->data = der; 495 ret->value.asn1_string->length = derlen; 496 497 der = NULL; 498 499 bad: 500 501 if (der) 502 OPENSSL_free(der); 503 504 if (sk) 505 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free); 506 if (sect) 507 X509V3_section_free(cnf, sect); 508 509 return ret; 510 } 511 512 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, int exp_constructed, int exp_pad, int imp_ok) 513 { 514 tag_exp_type *exp_tmp; 515 /* Can only have IMPLICIT if permitted */ 516 if ((arg->imp_tag != -1) && !imp_ok) 517 { 518 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_ILLEGAL_IMPLICIT_TAG); 519 return 0; 520 } 521 522 if (arg->exp_count == ASN1_FLAG_EXP_MAX) 523 { 524 ASN1err(ASN1_F_APPEND_EXP, ASN1_R_DEPTH_EXCEEDED); 525 return 0; 526 } 527 528 exp_tmp = &arg->exp_list[arg->exp_count++]; 529 530 /* If IMPLICIT set tag to implicit value then 531 * reset implicit tag since it has been used. 532 */ 533 if (arg->imp_tag != -1) 534 { 535 exp_tmp->exp_tag = arg->imp_tag; 536 exp_tmp->exp_class = arg->imp_class; 537 arg->imp_tag = -1; 538 arg->imp_class = -1; 539 } 540 else 541 { 542 exp_tmp->exp_tag = exp_tag; 543 exp_tmp->exp_class = exp_class; 544 } 545 exp_tmp->exp_constructed = exp_constructed; 546 exp_tmp->exp_pad = exp_pad; 547 548 return 1; 549 } 550 551 552 static int asn1_str2tag(const char *tagstr, int len) 553 { 554 unsigned int i; 555 static const struct tag_name_st *tntmp, tnst [] = { 556 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN), 557 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN), 558 ASN1_GEN_STR("NULL", V_ASN1_NULL), 559 ASN1_GEN_STR("INT", V_ASN1_INTEGER), 560 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER), 561 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED), 562 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED), 563 ASN1_GEN_STR("OID", V_ASN1_OBJECT), 564 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT), 565 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME), 566 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME), 567 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME), 568 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME), 569 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING), 570 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING), 571 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING), 572 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING), 573 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING), 574 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING), 575 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING), 576 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING), 577 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING), 578 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING), 579 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING), 580 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING), 581 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING), 582 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING), 583 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING), 584 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING), 585 ASN1_GEN_STR("T61", V_ASN1_T61STRING), 586 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING), 587 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING), 588 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING), 589 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING), 590 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING), 591 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING), 592 593 /* Special cases */ 594 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE), 595 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE), 596 ASN1_GEN_STR("SET", V_ASN1_SET), 597 /* type modifiers */ 598 /* Explicit tag */ 599 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP), 600 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP), 601 /* Implicit tag */ 602 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP), 603 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP), 604 /* OCTET STRING wrapper */ 605 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP), 606 /* SEQUENCE wrapper */ 607 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP), 608 /* SET wrapper */ 609 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP), 610 /* BIT STRING wrapper */ 611 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP), 612 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT), 613 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT), 614 }; 615 616 if (len == -1) 617 len = strlen(tagstr); 618 619 tntmp = tnst; 620 for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++) 621 { 622 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len)) 623 return tntmp->tag; 624 } 625 626 return -1; 627 } 628 629 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype) 630 { 631 ASN1_TYPE *atmp = NULL; 632 633 CONF_VALUE vtmp; 634 635 unsigned char *rdata; 636 long rdlen; 637 638 int no_unused = 1; 639 640 if (!(atmp = ASN1_TYPE_new())) 641 { 642 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 643 return NULL; 644 } 645 646 if (!str) 647 str = ""; 648 649 switch(utype) 650 { 651 652 case V_ASN1_NULL: 653 if (str && *str) 654 { 655 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_NULL_VALUE); 656 goto bad_form; 657 } 658 break; 659 660 case V_ASN1_BOOLEAN: 661 if (format != ASN1_GEN_FORMAT_ASCII) 662 { 663 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_NOT_ASCII_FORMAT); 664 goto bad_form; 665 } 666 vtmp.name = NULL; 667 vtmp.section = NULL; 668 vtmp.value = (char *)str; 669 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) 670 { 671 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BOOLEAN); 672 goto bad_str; 673 } 674 break; 675 676 case V_ASN1_INTEGER: 677 case V_ASN1_ENUMERATED: 678 if (format != ASN1_GEN_FORMAT_ASCII) 679 { 680 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_INTEGER_NOT_ASCII_FORMAT); 681 goto bad_form; 682 } 683 if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str))) 684 { 685 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_INTEGER); 686 goto bad_str; 687 } 688 break; 689 690 case V_ASN1_OBJECT: 691 if (format != ASN1_GEN_FORMAT_ASCII) 692 { 693 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_OBJECT_NOT_ASCII_FORMAT); 694 goto bad_form; 695 } 696 if (!(atmp->value.object = OBJ_txt2obj(str, 0))) 697 { 698 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_OBJECT); 699 goto bad_str; 700 } 701 break; 702 703 case V_ASN1_UTCTIME: 704 case V_ASN1_GENERALIZEDTIME: 705 if (format != ASN1_GEN_FORMAT_ASCII) 706 { 707 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_TIME_NOT_ASCII_FORMAT); 708 goto bad_form; 709 } 710 if (!(atmp->value.asn1_string = ASN1_STRING_new())) 711 { 712 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 713 goto bad_str; 714 } 715 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) 716 { 717 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 718 goto bad_str; 719 } 720 atmp->value.asn1_string->type = utype; 721 if (!ASN1_TIME_check(atmp->value.asn1_string)) 722 { 723 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_TIME_VALUE); 724 goto bad_str; 725 } 726 727 break; 728 729 case V_ASN1_BMPSTRING: 730 case V_ASN1_PRINTABLESTRING: 731 case V_ASN1_IA5STRING: 732 case V_ASN1_T61STRING: 733 case V_ASN1_UTF8STRING: 734 case V_ASN1_VISIBLESTRING: 735 case V_ASN1_UNIVERSALSTRING: 736 case V_ASN1_GENERALSTRING: 737 case V_ASN1_NUMERICSTRING: 738 739 if (format == ASN1_GEN_FORMAT_ASCII) 740 format = MBSTRING_ASC; 741 else if (format == ASN1_GEN_FORMAT_UTF8) 742 format = MBSTRING_UTF8; 743 else 744 { 745 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_FORMAT); 746 goto bad_form; 747 } 748 749 750 if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str, 751 -1, format, ASN1_tag2bit(utype)) <= 0) 752 { 753 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 754 goto bad_str; 755 } 756 757 758 break; 759 760 case V_ASN1_BIT_STRING: 761 762 case V_ASN1_OCTET_STRING: 763 764 if (!(atmp->value.asn1_string = ASN1_STRING_new())) 765 { 766 ASN1err(ASN1_F_ASN1_STR2TYPE, ERR_R_MALLOC_FAILURE); 767 goto bad_form; 768 } 769 770 if (format == ASN1_GEN_FORMAT_HEX) 771 { 772 773 if (!(rdata = string_to_hex((char *)str, &rdlen))) 774 { 775 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_HEX); 776 goto bad_str; 777 } 778 779 atmp->value.asn1_string->data = rdata; 780 atmp->value.asn1_string->length = rdlen; 781 atmp->value.asn1_string->type = utype; 782 783 } 784 else if (format == ASN1_GEN_FORMAT_ASCII) 785 ASN1_STRING_set(atmp->value.asn1_string, str, -1); 786 else if ((format == ASN1_GEN_FORMAT_BITLIST) && (utype == V_ASN1_BIT_STRING)) 787 { 788 if (!CONF_parse_list(str, ',', 1, bitstr_cb, atmp->value.bit_string)) 789 { 790 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_LIST_ERROR); 791 goto bad_str; 792 } 793 no_unused = 0; 794 795 } 796 else 797 { 798 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_ILLEGAL_BITSTRING_FORMAT); 799 goto bad_form; 800 } 801 802 if ((utype == V_ASN1_BIT_STRING) && no_unused) 803 { 804 atmp->value.asn1_string->flags 805 &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); 806 atmp->value.asn1_string->flags 807 |= ASN1_STRING_FLAG_BITS_LEFT; 808 } 809 810 811 break; 812 813 default: 814 ASN1err(ASN1_F_ASN1_STR2TYPE, ASN1_R_UNSUPPORTED_TYPE); 815 goto bad_str; 816 break; 817 } 818 819 820 atmp->type = utype; 821 return atmp; 822 823 824 bad_str: 825 ERR_add_error_data(2, "string=", str); 826 bad_form: 827 828 ASN1_TYPE_free(atmp); 829 return NULL; 830 831 } 832 833 static int bitstr_cb(const char *elem, int len, void *bitstr) 834 { 835 long bitnum; 836 char *eptr; 837 if (!elem) 838 return 0; 839 bitnum = strtoul(elem, &eptr, 10); 840 if (eptr && *eptr && (eptr != elem + len)) 841 return 0; 842 if (bitnum < 0) 843 { 844 ASN1err(ASN1_F_BITSTR_CB, ASN1_R_INVALID_NUMBER); 845 return 0; 846 } 847 if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) 848 { 849 ASN1err(ASN1_F_BITSTR_CB, ERR_R_MALLOC_FAILURE); 850 return 0; 851 } 852 return 1; 853 } 854 855
