1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay (at) cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] */ 56 57 #include <openssl/x509.h> 58 59 #include <string.h> 60 61 #include <openssl/asn1.h> 62 #include <openssl/err.h> 63 #include <openssl/mem.h> 64 #include <openssl/obj.h> 65 #include <openssl/x509v3.h> 66 67 #include "../internal.h" 68 69 /* 70 * Although this file is in crypto/x509 for layering purposes, it emits 71 * errors from the ASN.1 module for OpenSSL compatibility. 72 */ 73 74 #define ASN1_GEN_FLAG 0x10000 75 #define ASN1_GEN_FLAG_IMP (ASN1_GEN_FLAG|1) 76 #define ASN1_GEN_FLAG_EXP (ASN1_GEN_FLAG|2) 77 #define ASN1_GEN_FLAG_TAG (ASN1_GEN_FLAG|3) 78 #define ASN1_GEN_FLAG_BITWRAP (ASN1_GEN_FLAG|4) 79 #define ASN1_GEN_FLAG_OCTWRAP (ASN1_GEN_FLAG|5) 80 #define ASN1_GEN_FLAG_SEQWRAP (ASN1_GEN_FLAG|6) 81 #define ASN1_GEN_FLAG_SETWRAP (ASN1_GEN_FLAG|7) 82 #define ASN1_GEN_FLAG_FORMAT (ASN1_GEN_FLAG|8) 83 84 #define ASN1_GEN_STR(str,val) {str, sizeof(str) - 1, val} 85 86 #define ASN1_FLAG_EXP_MAX 20 87 /* Maximum number of nested sequences */ 88 #define ASN1_GEN_SEQ_MAX_DEPTH 50 89 90 /* Input formats */ 91 92 /* ASCII: default */ 93 #define ASN1_GEN_FORMAT_ASCII 1 94 /* UTF8 */ 95 #define ASN1_GEN_FORMAT_UTF8 2 96 /* Hex */ 97 #define ASN1_GEN_FORMAT_HEX 3 98 /* List of bits */ 99 #define ASN1_GEN_FORMAT_BITLIST 4 100 101 struct tag_name_st { 102 const char *strnam; 103 int len; 104 int tag; 105 }; 106 107 typedef struct { 108 int exp_tag; 109 int exp_class; 110 int exp_constructed; 111 int exp_pad; 112 long exp_len; 113 } tag_exp_type; 114 115 typedef struct { 116 int imp_tag; 117 int imp_class; 118 int utype; 119 int format; 120 const char *str; 121 tag_exp_type exp_list[ASN1_FLAG_EXP_MAX]; 122 int exp_count; 123 } tag_exp_arg; 124 125 static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth, 126 int *perr); 127 static int bitstr_cb(const char *elem, int len, void *bitstr); 128 static int asn1_cb(const char *elem, int len, void *bitstr); 129 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, 130 int exp_constructed, int exp_pad, int imp_ok); 131 static int parse_tagging(const char *vstart, int vlen, int *ptag, 132 int *pclass); 133 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf, 134 int depth, int *perr); 135 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype); 136 static int asn1_str2tag(const char *tagstr, int len); 137 138 ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf) 139 { 140 X509V3_CTX cnf; 141 142 if (!nconf) 143 return ASN1_generate_v3(str, NULL); 144 145 X509V3_set_nconf(&cnf, nconf); 146 return ASN1_generate_v3(str, &cnf); 147 } 148 149 ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf) 150 { 151 int err = 0; 152 ASN1_TYPE *ret = generate_v3(str, cnf, 0, &err); 153 if (err) 154 OPENSSL_PUT_ERROR(ASN1, err); 155 return ret; 156 } 157 158 static ASN1_TYPE *generate_v3(char *str, X509V3_CTX *cnf, int depth, 159 int *perr) 160 { 161 ASN1_TYPE *ret; 162 tag_exp_arg asn1_tags; 163 tag_exp_type *etmp; 164 165 int i, len; 166 167 unsigned char *orig_der = NULL, *new_der = NULL; 168 const unsigned char *cpy_start; 169 unsigned char *p; 170 const unsigned char *cp; 171 int cpy_len; 172 long hdr_len = 0; 173 int hdr_constructed = 0, hdr_tag, hdr_class; 174 int r; 175 176 asn1_tags.imp_tag = -1; 177 asn1_tags.imp_class = -1; 178 asn1_tags.format = ASN1_GEN_FORMAT_ASCII; 179 asn1_tags.exp_count = 0; 180 if (CONF_parse_list(str, ',', 1, asn1_cb, &asn1_tags) != 0) { 181 *perr = ASN1_R_UNKNOWN_TAG; 182 return NULL; 183 } 184 185 if ((asn1_tags.utype == V_ASN1_SEQUENCE) 186 || (asn1_tags.utype == V_ASN1_SET)) { 187 if (!cnf) { 188 *perr = ASN1_R_SEQUENCE_OR_SET_NEEDS_CONFIG; 189 return NULL; 190 } 191 if (depth >= ASN1_GEN_SEQ_MAX_DEPTH) { 192 *perr = ASN1_R_ILLEGAL_NESTED_TAGGING; 193 return NULL; 194 } 195 ret = asn1_multi(asn1_tags.utype, asn1_tags.str, cnf, depth, perr); 196 } else 197 ret = asn1_str2type(asn1_tags.str, asn1_tags.format, asn1_tags.utype); 198 199 if (!ret) 200 return NULL; 201 202 /* If no tagging return base type */ 203 if ((asn1_tags.imp_tag == -1) && (asn1_tags.exp_count == 0)) 204 return ret; 205 206 /* Generate the encoding */ 207 cpy_len = i2d_ASN1_TYPE(ret, &orig_der); 208 ASN1_TYPE_free(ret); 209 ret = NULL; 210 /* Set point to start copying for modified encoding */ 211 cpy_start = orig_der; 212 213 /* Do we need IMPLICIT tagging? */ 214 if (asn1_tags.imp_tag != -1) { 215 /* If IMPLICIT we will replace the underlying tag */ 216 /* Skip existing tag+len */ 217 r = ASN1_get_object(&cpy_start, &hdr_len, &hdr_tag, &hdr_class, 218 cpy_len); 219 if (r & 0x80) 220 goto err; 221 /* Update copy length */ 222 cpy_len -= cpy_start - orig_der; 223 /* 224 * For IMPLICIT tagging the length should match the original length 225 * and constructed flag should be consistent. 226 */ 227 if (r & 0x1) { 228 /* Indefinite length constructed */ 229 hdr_constructed = 2; 230 hdr_len = 0; 231 } else 232 /* Just retain constructed flag */ 233 hdr_constructed = r & V_ASN1_CONSTRUCTED; 234 /* 235 * Work out new length with IMPLICIT tag: ignore constructed because 236 * it will mess up if indefinite length 237 */ 238 len = ASN1_object_size(0, hdr_len, asn1_tags.imp_tag); 239 } else 240 len = cpy_len; 241 242 /* Work out length in any EXPLICIT, starting from end */ 243 244 for (i = 0, etmp = asn1_tags.exp_list + asn1_tags.exp_count - 1; 245 i < asn1_tags.exp_count; i++, etmp--) { 246 /* Content length: number of content octets + any padding */ 247 len += etmp->exp_pad; 248 etmp->exp_len = len; 249 /* Total object length: length including new header */ 250 len = ASN1_object_size(0, len, etmp->exp_tag); 251 } 252 253 /* Allocate buffer for new encoding */ 254 255 new_der = OPENSSL_malloc(len); 256 if (!new_der) 257 goto err; 258 259 /* Generate tagged encoding */ 260 261 p = new_der; 262 263 /* Output explicit tags first */ 264 265 for (i = 0, etmp = asn1_tags.exp_list; i < asn1_tags.exp_count; 266 i++, etmp++) { 267 ASN1_put_object(&p, etmp->exp_constructed, etmp->exp_len, 268 etmp->exp_tag, etmp->exp_class); 269 if (etmp->exp_pad) 270 *p++ = 0; 271 } 272 273 /* If IMPLICIT, output tag */ 274 275 if (asn1_tags.imp_tag != -1) { 276 if (asn1_tags.imp_class == V_ASN1_UNIVERSAL 277 && (asn1_tags.imp_tag == V_ASN1_SEQUENCE 278 || asn1_tags.imp_tag == V_ASN1_SET)) 279 hdr_constructed = V_ASN1_CONSTRUCTED; 280 ASN1_put_object(&p, hdr_constructed, hdr_len, 281 asn1_tags.imp_tag, asn1_tags.imp_class); 282 } 283 284 /* Copy across original encoding */ 285 OPENSSL_memcpy(p, cpy_start, cpy_len); 286 287 cp = new_der; 288 289 /* Obtain new ASN1_TYPE structure */ 290 ret = d2i_ASN1_TYPE(NULL, &cp, len); 291 292 err: 293 if (orig_der) 294 OPENSSL_free(orig_der); 295 if (new_der) 296 OPENSSL_free(new_der); 297 298 return ret; 299 300 } 301 302 static int asn1_cb(const char *elem, int len, void *bitstr) 303 { 304 tag_exp_arg *arg = bitstr; 305 int i; 306 int utype; 307 int vlen = 0; 308 const char *p, *vstart = NULL; 309 310 int tmp_tag, tmp_class; 311 312 if (elem == NULL) 313 return -1; 314 315 for (i = 0, p = elem; i < len; p++, i++) { 316 /* Look for the ':' in name value pairs */ 317 if (*p == ':') { 318 vstart = p + 1; 319 vlen = len - (vstart - elem); 320 len = p - elem; 321 break; 322 } 323 } 324 325 utype = asn1_str2tag(elem, len); 326 327 if (utype == -1) { 328 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_TAG); 329 ERR_add_error_data(2, "tag=", elem); 330 return -1; 331 } 332 333 /* If this is not a modifier mark end of string and exit */ 334 if (!(utype & ASN1_GEN_FLAG)) { 335 arg->utype = utype; 336 arg->str = vstart; 337 /* If no value and not end of string, error */ 338 if (!vstart && elem[len]) { 339 OPENSSL_PUT_ERROR(ASN1, ASN1_R_MISSING_VALUE); 340 return -1; 341 } 342 return 0; 343 } 344 345 switch (utype) { 346 347 case ASN1_GEN_FLAG_IMP: 348 /* Check for illegal multiple IMPLICIT tagging */ 349 if (arg->imp_tag != -1) { 350 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_NESTED_TAGGING); 351 return -1; 352 } 353 if (!parse_tagging(vstart, vlen, &arg->imp_tag, &arg->imp_class)) 354 return -1; 355 break; 356 357 case ASN1_GEN_FLAG_EXP: 358 359 if (!parse_tagging(vstart, vlen, &tmp_tag, &tmp_class)) 360 return -1; 361 if (!append_exp(arg, tmp_tag, tmp_class, 1, 0, 0)) 362 return -1; 363 break; 364 365 case ASN1_GEN_FLAG_SEQWRAP: 366 if (!append_exp(arg, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 1, 0, 1)) 367 return -1; 368 break; 369 370 case ASN1_GEN_FLAG_SETWRAP: 371 if (!append_exp(arg, V_ASN1_SET, V_ASN1_UNIVERSAL, 1, 0, 1)) 372 return -1; 373 break; 374 375 case ASN1_GEN_FLAG_BITWRAP: 376 if (!append_exp(arg, V_ASN1_BIT_STRING, V_ASN1_UNIVERSAL, 0, 1, 1)) 377 return -1; 378 break; 379 380 case ASN1_GEN_FLAG_OCTWRAP: 381 if (!append_exp(arg, V_ASN1_OCTET_STRING, V_ASN1_UNIVERSAL, 0, 0, 1)) 382 return -1; 383 break; 384 385 case ASN1_GEN_FLAG_FORMAT: 386 if (!vstart) { 387 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_FORMAT); 388 return -1; 389 } 390 if (!strncmp(vstart, "ASCII", 5)) 391 arg->format = ASN1_GEN_FORMAT_ASCII; 392 else if (!strncmp(vstart, "UTF8", 4)) 393 arg->format = ASN1_GEN_FORMAT_UTF8; 394 else if (!strncmp(vstart, "HEX", 3)) 395 arg->format = ASN1_GEN_FORMAT_HEX; 396 else if (!strncmp(vstart, "BITLIST", 7)) 397 arg->format = ASN1_GEN_FORMAT_BITLIST; 398 else { 399 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_FORMAT); 400 return -1; 401 } 402 break; 403 404 } 405 406 return 1; 407 408 } 409 410 static int parse_tagging(const char *vstart, int vlen, int *ptag, int *pclass) 411 { 412 char erch[2]; 413 long tag_num; 414 char *eptr; 415 if (!vstart) 416 return 0; 417 tag_num = strtoul(vstart, &eptr, 10); 418 /* Check we haven't gone past max length: should be impossible */ 419 if (eptr && *eptr && (eptr > vstart + vlen)) 420 return 0; 421 if (tag_num < 0) { 422 OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_NUMBER); 423 return 0; 424 } 425 *ptag = tag_num; 426 /* If we have non numeric characters, parse them */ 427 if (eptr) 428 vlen -= eptr - vstart; 429 else 430 vlen = 0; 431 if (vlen) { 432 switch (*eptr) { 433 434 case 'U': 435 *pclass = V_ASN1_UNIVERSAL; 436 break; 437 438 case 'A': 439 *pclass = V_ASN1_APPLICATION; 440 break; 441 442 case 'P': 443 *pclass = V_ASN1_PRIVATE; 444 break; 445 446 case 'C': 447 *pclass = V_ASN1_CONTEXT_SPECIFIC; 448 break; 449 450 default: 451 erch[0] = *eptr; 452 erch[1] = 0; 453 OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_MODIFIER); 454 ERR_add_error_data(2, "Char=", erch); 455 return 0; 456 break; 457 458 } 459 } else 460 *pclass = V_ASN1_CONTEXT_SPECIFIC; 461 462 return 1; 463 464 } 465 466 /* Handle multiple types: SET and SEQUENCE */ 467 468 static ASN1_TYPE *asn1_multi(int utype, const char *section, X509V3_CTX *cnf, 469 int depth, int *perr) 470 { 471 ASN1_TYPE *ret = NULL; 472 STACK_OF(ASN1_TYPE) *sk = NULL; 473 STACK_OF(CONF_VALUE) *sect = NULL; 474 unsigned char *der = NULL; 475 int derlen; 476 size_t i; 477 sk = sk_ASN1_TYPE_new_null(); 478 if (!sk) 479 goto bad; 480 if (section) { 481 if (!cnf) 482 goto bad; 483 sect = X509V3_get_section(cnf, (char *)section); 484 if (!sect) 485 goto bad; 486 for (i = 0; i < sk_CONF_VALUE_num(sect); i++) { 487 ASN1_TYPE *typ = 488 generate_v3(sk_CONF_VALUE_value(sect, i)->value, cnf, 489 depth + 1, perr); 490 if (!typ) 491 goto bad; 492 if (!sk_ASN1_TYPE_push(sk, typ)) 493 goto bad; 494 } 495 } 496 497 /* 498 * Now we has a STACK of the components, convert to the correct form 499 */ 500 501 if (utype == V_ASN1_SET) 502 derlen = i2d_ASN1_SET_ANY(sk, &der); 503 else 504 derlen = i2d_ASN1_SEQUENCE_ANY(sk, &der); 505 506 if (derlen < 0) 507 goto bad; 508 509 if (!(ret = ASN1_TYPE_new())) 510 goto bad; 511 512 if (!(ret->value.asn1_string = ASN1_STRING_type_new(utype))) 513 goto bad; 514 515 ret->type = utype; 516 517 ret->value.asn1_string->data = der; 518 ret->value.asn1_string->length = derlen; 519 520 der = NULL; 521 522 bad: 523 524 if (der) 525 OPENSSL_free(der); 526 527 if (sk) 528 sk_ASN1_TYPE_pop_free(sk, ASN1_TYPE_free); 529 if (sect) 530 X509V3_section_free(cnf, sect); 531 532 return ret; 533 } 534 535 static int append_exp(tag_exp_arg *arg, int exp_tag, int exp_class, 536 int exp_constructed, int exp_pad, int imp_ok) 537 { 538 tag_exp_type *exp_tmp; 539 /* Can only have IMPLICIT if permitted */ 540 if ((arg->imp_tag != -1) && !imp_ok) { 541 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_IMPLICIT_TAG); 542 return 0; 543 } 544 545 if (arg->exp_count == ASN1_FLAG_EXP_MAX) { 546 OPENSSL_PUT_ERROR(ASN1, ASN1_R_DEPTH_EXCEEDED); 547 return 0; 548 } 549 550 exp_tmp = &arg->exp_list[arg->exp_count++]; 551 552 /* 553 * If IMPLICIT set tag to implicit value then reset implicit tag since it 554 * has been used. 555 */ 556 if (arg->imp_tag != -1) { 557 exp_tmp->exp_tag = arg->imp_tag; 558 exp_tmp->exp_class = arg->imp_class; 559 arg->imp_tag = -1; 560 arg->imp_class = -1; 561 } else { 562 exp_tmp->exp_tag = exp_tag; 563 exp_tmp->exp_class = exp_class; 564 } 565 exp_tmp->exp_constructed = exp_constructed; 566 exp_tmp->exp_pad = exp_pad; 567 568 return 1; 569 } 570 571 static int asn1_str2tag(const char *tagstr, int len) 572 { 573 unsigned int i; 574 static const struct tag_name_st *tntmp, tnst[] = { 575 ASN1_GEN_STR("BOOL", V_ASN1_BOOLEAN), 576 ASN1_GEN_STR("BOOLEAN", V_ASN1_BOOLEAN), 577 ASN1_GEN_STR("NULL", V_ASN1_NULL), 578 ASN1_GEN_STR("INT", V_ASN1_INTEGER), 579 ASN1_GEN_STR("INTEGER", V_ASN1_INTEGER), 580 ASN1_GEN_STR("ENUM", V_ASN1_ENUMERATED), 581 ASN1_GEN_STR("ENUMERATED", V_ASN1_ENUMERATED), 582 ASN1_GEN_STR("OID", V_ASN1_OBJECT), 583 ASN1_GEN_STR("OBJECT", V_ASN1_OBJECT), 584 ASN1_GEN_STR("UTCTIME", V_ASN1_UTCTIME), 585 ASN1_GEN_STR("UTC", V_ASN1_UTCTIME), 586 ASN1_GEN_STR("GENERALIZEDTIME", V_ASN1_GENERALIZEDTIME), 587 ASN1_GEN_STR("GENTIME", V_ASN1_GENERALIZEDTIME), 588 ASN1_GEN_STR("OCT", V_ASN1_OCTET_STRING), 589 ASN1_GEN_STR("OCTETSTRING", V_ASN1_OCTET_STRING), 590 ASN1_GEN_STR("BITSTR", V_ASN1_BIT_STRING), 591 ASN1_GEN_STR("BITSTRING", V_ASN1_BIT_STRING), 592 ASN1_GEN_STR("UNIVERSALSTRING", V_ASN1_UNIVERSALSTRING), 593 ASN1_GEN_STR("UNIV", V_ASN1_UNIVERSALSTRING), 594 ASN1_GEN_STR("IA5", V_ASN1_IA5STRING), 595 ASN1_GEN_STR("IA5STRING", V_ASN1_IA5STRING), 596 ASN1_GEN_STR("UTF8", V_ASN1_UTF8STRING), 597 ASN1_GEN_STR("UTF8String", V_ASN1_UTF8STRING), 598 ASN1_GEN_STR("BMP", V_ASN1_BMPSTRING), 599 ASN1_GEN_STR("BMPSTRING", V_ASN1_BMPSTRING), 600 ASN1_GEN_STR("VISIBLESTRING", V_ASN1_VISIBLESTRING), 601 ASN1_GEN_STR("VISIBLE", V_ASN1_VISIBLESTRING), 602 ASN1_GEN_STR("PRINTABLESTRING", V_ASN1_PRINTABLESTRING), 603 ASN1_GEN_STR("PRINTABLE", V_ASN1_PRINTABLESTRING), 604 ASN1_GEN_STR("T61", V_ASN1_T61STRING), 605 ASN1_GEN_STR("T61STRING", V_ASN1_T61STRING), 606 ASN1_GEN_STR("TELETEXSTRING", V_ASN1_T61STRING), 607 ASN1_GEN_STR("GeneralString", V_ASN1_GENERALSTRING), 608 ASN1_GEN_STR("GENSTR", V_ASN1_GENERALSTRING), 609 ASN1_GEN_STR("NUMERIC", V_ASN1_NUMERICSTRING), 610 ASN1_GEN_STR("NUMERICSTRING", V_ASN1_NUMERICSTRING), 611 612 /* Special cases */ 613 ASN1_GEN_STR("SEQUENCE", V_ASN1_SEQUENCE), 614 ASN1_GEN_STR("SEQ", V_ASN1_SEQUENCE), 615 ASN1_GEN_STR("SET", V_ASN1_SET), 616 /* type modifiers */ 617 /* Explicit tag */ 618 ASN1_GEN_STR("EXP", ASN1_GEN_FLAG_EXP), 619 ASN1_GEN_STR("EXPLICIT", ASN1_GEN_FLAG_EXP), 620 /* Implicit tag */ 621 ASN1_GEN_STR("IMP", ASN1_GEN_FLAG_IMP), 622 ASN1_GEN_STR("IMPLICIT", ASN1_GEN_FLAG_IMP), 623 /* OCTET STRING wrapper */ 624 ASN1_GEN_STR("OCTWRAP", ASN1_GEN_FLAG_OCTWRAP), 625 /* SEQUENCE wrapper */ 626 ASN1_GEN_STR("SEQWRAP", ASN1_GEN_FLAG_SEQWRAP), 627 /* SET wrapper */ 628 ASN1_GEN_STR("SETWRAP", ASN1_GEN_FLAG_SETWRAP), 629 /* BIT STRING wrapper */ 630 ASN1_GEN_STR("BITWRAP", ASN1_GEN_FLAG_BITWRAP), 631 ASN1_GEN_STR("FORM", ASN1_GEN_FLAG_FORMAT), 632 ASN1_GEN_STR("FORMAT", ASN1_GEN_FLAG_FORMAT), 633 }; 634 635 if (len == -1) 636 len = strlen(tagstr); 637 638 tntmp = tnst; 639 for (i = 0; i < sizeof(tnst) / sizeof(struct tag_name_st); i++, tntmp++) { 640 if ((len == tntmp->len) && !strncmp(tntmp->strnam, tagstr, len)) 641 return tntmp->tag; 642 } 643 644 return -1; 645 } 646 647 static ASN1_TYPE *asn1_str2type(const char *str, int format, int utype) 648 { 649 ASN1_TYPE *atmp = NULL; 650 651 CONF_VALUE vtmp; 652 653 unsigned char *rdata; 654 long rdlen; 655 656 int no_unused = 1; 657 658 if (!(atmp = ASN1_TYPE_new())) { 659 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); 660 return NULL; 661 } 662 663 if (!str) 664 str = ""; 665 666 switch (utype) { 667 668 case V_ASN1_NULL: 669 if (str && *str) { 670 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_NULL_VALUE); 671 goto bad_form; 672 } 673 break; 674 675 case V_ASN1_BOOLEAN: 676 if (format != ASN1_GEN_FORMAT_ASCII) { 677 OPENSSL_PUT_ERROR(ASN1, ASN1_R_NOT_ASCII_FORMAT); 678 goto bad_form; 679 } 680 vtmp.name = NULL; 681 vtmp.section = NULL; 682 vtmp.value = (char *)str; 683 if (!X509V3_get_value_bool(&vtmp, &atmp->value.boolean)) { 684 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_BOOLEAN); 685 goto bad_str; 686 } 687 break; 688 689 case V_ASN1_INTEGER: 690 case V_ASN1_ENUMERATED: 691 if (format != ASN1_GEN_FORMAT_ASCII) { 692 OPENSSL_PUT_ERROR(ASN1, ASN1_R_INTEGER_NOT_ASCII_FORMAT); 693 goto bad_form; 694 } 695 if (!(atmp->value.integer = s2i_ASN1_INTEGER(NULL, (char *)str))) { 696 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_INTEGER); 697 goto bad_str; 698 } 699 break; 700 701 case V_ASN1_OBJECT: 702 if (format != ASN1_GEN_FORMAT_ASCII) { 703 OPENSSL_PUT_ERROR(ASN1, ASN1_R_OBJECT_NOT_ASCII_FORMAT); 704 goto bad_form; 705 } 706 if (!(atmp->value.object = OBJ_txt2obj(str, 0))) { 707 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_OBJECT); 708 goto bad_str; 709 } 710 break; 711 712 case V_ASN1_UTCTIME: 713 case V_ASN1_GENERALIZEDTIME: 714 if (format != ASN1_GEN_FORMAT_ASCII) { 715 OPENSSL_PUT_ERROR(ASN1, ASN1_R_TIME_NOT_ASCII_FORMAT); 716 goto bad_form; 717 } 718 if (!(atmp->value.asn1_string = ASN1_STRING_new())) { 719 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); 720 goto bad_str; 721 } 722 if (!ASN1_STRING_set(atmp->value.asn1_string, str, -1)) { 723 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); 724 goto bad_str; 725 } 726 atmp->value.asn1_string->type = utype; 727 if (!ASN1_TIME_check(atmp->value.asn1_string)) { 728 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_TIME_VALUE); 729 goto bad_str; 730 } 731 732 break; 733 734 case V_ASN1_BMPSTRING: 735 case V_ASN1_PRINTABLESTRING: 736 case V_ASN1_IA5STRING: 737 case V_ASN1_T61STRING: 738 case V_ASN1_UTF8STRING: 739 case V_ASN1_VISIBLESTRING: 740 case V_ASN1_UNIVERSALSTRING: 741 case V_ASN1_GENERALSTRING: 742 case V_ASN1_NUMERICSTRING: 743 744 if (format == ASN1_GEN_FORMAT_ASCII) 745 format = MBSTRING_ASC; 746 else if (format == ASN1_GEN_FORMAT_UTF8) 747 format = MBSTRING_UTF8; 748 else { 749 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_FORMAT); 750 goto bad_form; 751 } 752 753 if (ASN1_mbstring_copy(&atmp->value.asn1_string, (unsigned char *)str, 754 -1, format, ASN1_tag2bit(utype)) <= 0) { 755 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); 756 goto bad_str; 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 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); 767 goto bad_form; 768 } 769 770 if (format == ASN1_GEN_FORMAT_HEX) { 771 772 if (!(rdata = string_to_hex((char *)str, &rdlen))) { 773 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_HEX); 774 goto bad_str; 775 } 776 777 atmp->value.asn1_string->data = rdata; 778 atmp->value.asn1_string->length = rdlen; 779 atmp->value.asn1_string->type = utype; 780 781 } else if (format == ASN1_GEN_FORMAT_ASCII) 782 ASN1_STRING_set(atmp->value.asn1_string, str, -1); 783 else if ((format == ASN1_GEN_FORMAT_BITLIST) 784 && (utype == V_ASN1_BIT_STRING)) { 785 if (!CONF_parse_list 786 (str, ',', 1, bitstr_cb, atmp->value.bit_string)) { 787 OPENSSL_PUT_ERROR(ASN1, ASN1_R_LIST_ERROR); 788 goto bad_str; 789 } 790 no_unused = 0; 791 792 } else { 793 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_BITSTRING_FORMAT); 794 goto bad_form; 795 } 796 797 if ((utype == V_ASN1_BIT_STRING) && no_unused) { 798 atmp->value.asn1_string->flags 799 &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); 800 atmp->value.asn1_string->flags |= ASN1_STRING_FLAG_BITS_LEFT; 801 } 802 803 break; 804 805 default: 806 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNSUPPORTED_TYPE); 807 goto bad_str; 808 break; 809 } 810 811 atmp->type = utype; 812 return atmp; 813 814 bad_str: 815 ERR_add_error_data(2, "string=", str); 816 bad_form: 817 818 ASN1_TYPE_free(atmp); 819 return NULL; 820 821 } 822 823 static int bitstr_cb(const char *elem, int len, void *bitstr) 824 { 825 long bitnum; 826 char *eptr; 827 if (!elem) 828 return 0; 829 bitnum = strtoul(elem, &eptr, 10); 830 if (eptr && *eptr && (eptr != elem + len)) 831 return 0; 832 if (bitnum < 0) { 833 OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_NUMBER); 834 return 0; 835 } 836 if (!ASN1_BIT_STRING_set_bit(bitstr, bitnum, 1)) { 837 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); 838 return 0; 839 } 840 return 1; 841 } 842
