1 /* $OpenBSD: obj_dat.c,v 1.67 2023/12/14 14:02:57 tb Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <ctype.h> 60 #include <limits.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 65 #include <openssl/opensslconf.h> 66 67 #include <openssl/asn1.h> 68 #include <openssl/bn.h> 69 #include <openssl/err.h> 70 #include <openssl/lhash.h> 71 #include <openssl/objects.h> 72 73 #include "asn1_local.h" 74 75 /* obj_dat.h is generated from objects.h by obj_dat.pl */ 76 #include "obj_dat.h" 77 78 #define ADDED_DATA 0 79 #define ADDED_SNAME 1 80 #define ADDED_LNAME 2 81 #define ADDED_NID 3 82 83 typedef struct added_obj_st { 84 int type; 85 ASN1_OBJECT *obj; 86 } ADDED_OBJ; 87 DECLARE_LHASH_OF(ADDED_OBJ); 88 89 static int new_nid = NUM_NID; 90 static LHASH_OF(ADDED_OBJ) *added = NULL; 91 92 static unsigned long 93 added_obj_hash(const ADDED_OBJ *ca) 94 { 95 const ASN1_OBJECT *a; 96 int i; 97 unsigned long ret = 0; 98 unsigned char *p; 99 100 a = ca->obj; 101 switch (ca->type) { 102 case ADDED_DATA: 103 ret = a->length << 20L; 104 p = (unsigned char *)a->data; 105 for (i = 0; i < a->length; i++) 106 ret ^= p[i] << ((i * 3) % 24); 107 break; 108 case ADDED_SNAME: 109 ret = lh_strhash(a->sn); 110 break; 111 case ADDED_LNAME: 112 ret = lh_strhash(a->ln); 113 break; 114 case ADDED_NID: 115 ret = a->nid; 116 break; 117 default: 118 return 0; 119 } 120 ret &= 0x3fffffffL; 121 ret |= ca->type << 30L; 122 return (ret); 123 } 124 static IMPLEMENT_LHASH_HASH_FN(added_obj, ADDED_OBJ) 125 126 static int 127 added_obj_cmp(const ADDED_OBJ *ca, const ADDED_OBJ *cb) 128 { 129 const ASN1_OBJECT *a, *b; 130 int cmp; 131 132 if ((cmp = ca->type - cb->type) != 0) 133 return cmp; 134 135 a = ca->obj; 136 b = cb->obj; 137 switch (ca->type) { 138 case ADDED_DATA: 139 return OBJ_cmp(a, b); 140 case ADDED_SNAME: 141 if (a->sn == NULL) 142 return -1; 143 if (b->sn == NULL) 144 return 1; 145 return strcmp(a->sn, b->sn); 146 case ADDED_LNAME: 147 if (a->ln == NULL) 148 return -1; 149 if (b->ln == NULL) 150 return 1; 151 return strcmp(a->ln, b->ln); 152 case ADDED_NID: 153 return a->nid - b->nid; 154 default: 155 return 0; 156 } 157 } 158 static IMPLEMENT_LHASH_COMP_FN(added_obj, ADDED_OBJ) 159 160 static void 161 cleanup1_doall(ADDED_OBJ *a) 162 { 163 a->obj->nid = 0; 164 a->obj->flags |= ASN1_OBJECT_FLAG_DYNAMIC | 165 ASN1_OBJECT_FLAG_DYNAMIC_STRINGS | 166 ASN1_OBJECT_FLAG_DYNAMIC_DATA; 167 } 168 169 static void cleanup2_doall(ADDED_OBJ *a) 170 { 171 a->obj->nid++; 172 } 173 174 static void 175 cleanup3_doall(ADDED_OBJ *a) 176 { 177 if (--a->obj->nid == 0) 178 ASN1_OBJECT_free(a->obj); 179 free(a); 180 } 181 182 static IMPLEMENT_LHASH_DOALL_FN(cleanup1, ADDED_OBJ) 183 static IMPLEMENT_LHASH_DOALL_FN(cleanup2, ADDED_OBJ) 184 static IMPLEMENT_LHASH_DOALL_FN(cleanup3, ADDED_OBJ) 185 186 /* The purpose of obj_cleanup_defer is to avoid EVP_cleanup() attempting 187 * to use freed up OIDs. If necessary the actual freeing up of OIDs is 188 * delayed. 189 */ 190 191 int obj_cleanup_defer = 0; 192 193 void 194 check_defer(int nid) 195 { 196 if (!obj_cleanup_defer && nid >= NUM_NID) 197 obj_cleanup_defer = 1; 198 } 199 200 void 201 OBJ_cleanup(void) 202 { 203 if (obj_cleanup_defer) { 204 obj_cleanup_defer = 2; 205 return; 206 } 207 if (added == NULL) 208 return; 209 lh_ADDED_OBJ_down_load(added) = 0; 210 lh_ADDED_OBJ_doall(added, LHASH_DOALL_FN(cleanup1)); /* zero counters */ 211 lh_ADDED_OBJ_doall(added, LHASH_DOALL_FN(cleanup2)); /* set counters */ 212 lh_ADDED_OBJ_doall(added, LHASH_DOALL_FN(cleanup3)); /* free objects */ 213 lh_ADDED_OBJ_free(added); 214 added = NULL; 215 } 216 LCRYPTO_ALIAS(OBJ_cleanup); 217 218 int 219 OBJ_new_nid(int num) 220 { 221 int i; 222 223 i = new_nid; 224 new_nid += num; 225 return (i); 226 } 227 LCRYPTO_ALIAS(OBJ_new_nid); 228 229 int 230 OBJ_add_object(const ASN1_OBJECT *obj) 231 { 232 ASN1_OBJECT *o = NULL; 233 ADDED_OBJ *ao[4] = {NULL, NULL, NULL, NULL}, *aop; 234 int i; 235 236 if (added == NULL) 237 added = lh_ADDED_OBJ_new(); 238 if (added == NULL) 239 goto err; 240 if (obj == NULL || obj->nid == NID_undef) 241 goto err; 242 if ((o = OBJ_dup(obj)) == NULL) 243 goto err; 244 if (!(ao[ADDED_NID] = malloc(sizeof(ADDED_OBJ)))) 245 goto err2; 246 if ((o->length != 0) && (obj->data != NULL)) 247 if (!(ao[ADDED_DATA] = malloc(sizeof(ADDED_OBJ)))) 248 goto err2; 249 if (o->sn != NULL) 250 if (!(ao[ADDED_SNAME] = malloc(sizeof(ADDED_OBJ)))) 251 goto err2; 252 if (o->ln != NULL) 253 if (!(ao[ADDED_LNAME] = malloc(sizeof(ADDED_OBJ)))) 254 goto err2; 255 256 for (i = ADDED_DATA; i <= ADDED_NID; i++) { 257 if (ao[i] != NULL) { 258 ao[i]->type = i; 259 ao[i]->obj = o; 260 aop = lh_ADDED_OBJ_insert(added, ao[i]); 261 /* memory leak, but should not normally matter */ 262 free(aop); 263 } 264 } 265 o->flags &= ~(ASN1_OBJECT_FLAG_DYNAMIC | 266 ASN1_OBJECT_FLAG_DYNAMIC_STRINGS | 267 ASN1_OBJECT_FLAG_DYNAMIC_DATA); 268 269 return (o->nid); 270 271 err2: 272 OBJerror(ERR_R_MALLOC_FAILURE); 273 err: 274 for (i = ADDED_DATA; i <= ADDED_NID; i++) 275 free(ao[i]); 276 ASN1_OBJECT_free(o); 277 return (NID_undef); 278 } 279 LCRYPTO_ALIAS(OBJ_add_object); 280 281 ASN1_OBJECT * 282 OBJ_nid2obj(int n) 283 { 284 ADDED_OBJ ad, *adp; 285 ASN1_OBJECT ob; 286 287 if ((n >= 0) && (n < NUM_NID)) { 288 if ((n != NID_undef) && (nid_objs[n].nid == NID_undef)) { 289 OBJerror(OBJ_R_UNKNOWN_NID); 290 return (NULL); 291 } 292 return ((ASN1_OBJECT *)&(nid_objs[n])); 293 } else if (added == NULL) 294 return (NULL); 295 else { 296 ad.type = ADDED_NID; 297 ad.obj = &ob; 298 ob.nid = n; 299 adp = lh_ADDED_OBJ_retrieve(added, &ad); 300 if (adp != NULL) 301 return (adp->obj); 302 else { 303 OBJerror(OBJ_R_UNKNOWN_NID); 304 return (NULL); 305 } 306 } 307 } 308 LCRYPTO_ALIAS(OBJ_nid2obj); 309 310 const char * 311 OBJ_nid2sn(int nid) 312 { 313 if (nid >= 0 && nid < NUM_NID) { 314 if (nid == NID_undef || nid_objs[nid].nid != NID_undef) 315 return nid_objs[nid].sn; 316 317 goto unknown; 318 } 319 320 /* XXX - locking. */ 321 if (added != NULL) { 322 ASN1_OBJECT aobj = { 323 .nid = nid, 324 }; 325 ADDED_OBJ needle = { 326 .type = ADDED_NID, 327 .obj = &aobj, 328 }; 329 ADDED_OBJ *found; 330 331 if ((found = lh_ADDED_OBJ_retrieve(added, &needle)) != NULL) 332 return found->obj->sn; 333 } 334 335 unknown: 336 OBJerror(OBJ_R_UNKNOWN_NID); 337 338 return NULL; 339 } 340 LCRYPTO_ALIAS(OBJ_nid2sn); 341 342 const char * 343 OBJ_nid2ln(int nid) 344 { 345 if (nid >= 0 && nid < NUM_NID) { 346 if (nid == NID_undef || nid_objs[nid].nid != NID_undef) 347 return nid_objs[nid].ln; 348 349 goto unknown; 350 } 351 352 /* XXX - locking. */ 353 if (added != NULL) { 354 ASN1_OBJECT aobj = { 355 .nid = nid, 356 }; 357 ADDED_OBJ needle = { 358 .type = ADDED_NID, 359 .obj = &aobj, 360 }; 361 ADDED_OBJ *found; 362 363 if ((found = lh_ADDED_OBJ_retrieve(added, &needle)) != NULL) 364 return found->obj->ln; 365 } 366 367 unknown: 368 OBJerror(OBJ_R_UNKNOWN_NID); 369 370 return NULL; 371 } 372 LCRYPTO_ALIAS(OBJ_nid2ln); 373 374 static int 375 obj_objs_cmp(const void *aobj, const void *b) 376 { 377 const unsigned int *nid = b; 378 379 return OBJ_cmp(aobj, &nid_objs[*nid]); 380 } 381 382 int 383 OBJ_obj2nid(const ASN1_OBJECT *aobj) 384 { 385 const unsigned int *nid; 386 387 if (aobj == NULL || aobj->length == 0) 388 return NID_undef; 389 390 if (aobj->nid != NID_undef) 391 return aobj->nid; 392 393 /* XXX - locking. OpenSSL 3 moved this after built-in object lookup. */ 394 if (added != NULL) { 395 ADDED_OBJ needle = { 396 .type = ADDED_DATA, 397 .obj = (ASN1_OBJECT *)aobj, 398 }; 399 ADDED_OBJ *found; 400 401 if ((found = lh_ADDED_OBJ_retrieve(added, &needle)) != NULL) 402 return found->obj->nid; 403 } 404 405 /* obj_objs holds built-in obj NIDs in ascending OBJ_cmp() order. */ 406 nid = bsearch(aobj, obj_objs, NUM_OBJ, sizeof(unsigned int), obj_objs_cmp); 407 if (nid != NULL) 408 return *nid; 409 410 return NID_undef; 411 } 412 LCRYPTO_ALIAS(OBJ_obj2nid); 413 414 /* Convert an object name into an ASN1_OBJECT 415 * if "noname" is not set then search for short and long names first. 416 * This will convert the "dotted" form into an object: unlike OBJ_txt2nid 417 * it can be used with any objects, not just registered ones. 418 */ 419 420 ASN1_OBJECT * 421 OBJ_txt2obj(const char *s, int no_name) 422 { 423 int nid; 424 425 if (!no_name) { 426 if ((nid = OBJ_sn2nid(s)) != NID_undef || 427 (nid = OBJ_ln2nid(s)) != NID_undef) 428 return OBJ_nid2obj(nid); 429 } 430 431 return t2i_ASN1_OBJECT_internal(s); 432 } 433 LCRYPTO_ALIAS(OBJ_txt2obj); 434 435 int 436 OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *aobj, int no_name) 437 { 438 return i2t_ASN1_OBJECT_internal(aobj, buf, buf_len, no_name); 439 } 440 LCRYPTO_ALIAS(OBJ_obj2txt); 441 442 int 443 OBJ_txt2nid(const char *s) 444 { 445 ASN1_OBJECT *obj; 446 int nid; 447 448 obj = OBJ_txt2obj(s, 0); 449 nid = OBJ_obj2nid(obj); 450 ASN1_OBJECT_free(obj); 451 return nid; 452 } 453 LCRYPTO_ALIAS(OBJ_txt2nid); 454 455 static int 456 ln_objs_cmp(const void *ln, const void *b) 457 { 458 const unsigned int *nid = b; 459 460 return strcmp(ln, nid_objs[*nid].ln); 461 } 462 463 int 464 OBJ_ln2nid(const char *ln) 465 { 466 const unsigned int *nid; 467 468 /* XXX - locking. OpenSSL 3 moved this after built-in object lookup. */ 469 if (added != NULL) { 470 ASN1_OBJECT aobj = { 471 .ln = ln, 472 }; 473 ADDED_OBJ needle = { 474 .type = ADDED_LNAME, 475 .obj = &aobj, 476 }; 477 ADDED_OBJ *found; 478 479 if ((found = lh_ADDED_OBJ_retrieve(added, &needle)) != NULL) 480 return found->obj->nid; 481 } 482 483 /* ln_objs holds NIDs in ascending alphabetical order of LN. */ 484 nid = bsearch(ln, ln_objs, NUM_LN, sizeof(unsigned int), ln_objs_cmp); 485 if (nid != NULL) 486 return *nid; 487 488 return NID_undef; 489 } 490 LCRYPTO_ALIAS(OBJ_ln2nid); 491 492 static int 493 sn_objs_cmp(const void *sn, const void *b) 494 { 495 const unsigned int *nid = b; 496 497 return strcmp(sn, nid_objs[*nid].sn); 498 } 499 500 int 501 OBJ_sn2nid(const char *sn) 502 { 503 const unsigned int *nid; 504 505 /* XXX - locking. OpenSSL 3 moved this after built-in object lookup. */ 506 if (added != NULL) { 507 ASN1_OBJECT aobj = { 508 .sn = sn, 509 }; 510 ADDED_OBJ needle = { 511 .type = ADDED_SNAME, 512 .obj = &aobj, 513 }; 514 ADDED_OBJ *found; 515 516 if ((found = lh_ADDED_OBJ_retrieve(added, &needle)) != NULL) 517 return found->obj->nid; 518 } 519 520 /* sn_objs holds NIDs in ascending alphabetical order of SN. */ 521 nid = bsearch(sn, sn_objs, NUM_SN, sizeof(unsigned int), sn_objs_cmp); 522 if (nid != NULL) 523 return *nid; 524 525 return NID_undef; 526 } 527 LCRYPTO_ALIAS(OBJ_sn2nid); 528 529 const void * 530 OBJ_bsearch_(const void *key, const void *base, int num, int size, 531 int (*cmp)(const void *, const void *)) 532 { 533 return OBJ_bsearch_ex_(key, base, num, size, cmp, 0); 534 } 535 LCRYPTO_ALIAS(OBJ_bsearch_); 536 537 const void * 538 OBJ_bsearch_ex_(const void *key, const void *base_, int num, int size, 539 int (*cmp)(const void *, const void *), int flags) 540 { 541 const char *base = base_; 542 int l, h, i = 0, c = 0; 543 const char *p = NULL; 544 545 if (num == 0) 546 return (NULL); 547 l = 0; 548 h = num; 549 while (l < h) { 550 i = (l + h) / 2; 551 p = &(base[i * size]); 552 c = (*cmp)(key, p); 553 if (c < 0) 554 h = i; 555 else if (c > 0) 556 l = i + 1; 557 else 558 break; 559 } 560 if (c != 0 && !(flags & OBJ_BSEARCH_VALUE_ON_NOMATCH)) 561 p = NULL; 562 else if (c == 0 && (flags & OBJ_BSEARCH_FIRST_VALUE_ON_MATCH)) { 563 while (i > 0 && (*cmp)(key, &(base[(i - 1) * size])) == 0) 564 i--; 565 p = &(base[i * size]); 566 } 567 return (p); 568 } 569 570 int 571 OBJ_create_objects(BIO *in) 572 { 573 char buf[512]; 574 int i, num = 0; 575 char *o, *s, *l = NULL; 576 577 for (;;) { 578 s = o = NULL; 579 i = BIO_gets(in, buf, 512); 580 if (i <= 0) 581 return (num); 582 buf[i - 1] = '\0'; 583 if (!isalnum((unsigned char)buf[0])) 584 return (num); 585 o = s=buf; 586 while (isdigit((unsigned char)*s) || (*s == '.')) 587 s++; 588 if (*s != '\0') { 589 *(s++) = '\0'; 590 while (isspace((unsigned char)*s)) 591 s++; 592 if (*s == '\0') 593 s = NULL; 594 else { 595 l = s; 596 while ((*l != '\0') && 597 !isspace((unsigned char)*l)) 598 l++; 599 if (*l != '\0') { 600 *(l++) = '\0'; 601 while (isspace((unsigned char)*l)) 602 l++; 603 if (*l == '\0') 604 l = NULL; 605 } else 606 l = NULL; 607 } 608 } else 609 s = NULL; 610 if ((o == NULL) || (*o == '\0')) 611 return (num); 612 if (!OBJ_create(o, s, l)) 613 return (num); 614 num++; 615 } 616 /* return(num); */ 617 } 618 LCRYPTO_ALIAS(OBJ_create_objects); 619 620 int 621 OBJ_create(const char *oid, const char *sn, const char *ln) 622 { 623 int ok = 0; 624 ASN1_OBJECT *op = NULL; 625 unsigned char *buf; 626 int i; 627 628 i = a2d_ASN1_OBJECT(NULL, 0, oid, -1); 629 if (i <= 0) 630 return (0); 631 632 if ((buf = malloc(i)) == NULL) { 633 OBJerror(ERR_R_MALLOC_FAILURE); 634 return (0); 635 } 636 i = a2d_ASN1_OBJECT(buf, i, oid, -1); 637 if (i == 0) 638 goto err; 639 op = (ASN1_OBJECT *)ASN1_OBJECT_create(OBJ_new_nid(1), buf, i, sn, ln); 640 if (op == NULL) 641 goto err; 642 ok = OBJ_add_object(op); 643 644 err: 645 ASN1_OBJECT_free(op); 646 free(buf); 647 return (ok); 648 } 649 LCRYPTO_ALIAS(OBJ_create); 650 651 size_t 652 OBJ_length(const ASN1_OBJECT *obj) 653 { 654 if (obj == NULL) 655 return 0; 656 657 if (obj->length < 0) 658 return 0; 659 660 return obj->length; 661 } 662 LCRYPTO_ALIAS(OBJ_length); 663 664 const unsigned char * 665 OBJ_get0_data(const ASN1_OBJECT *obj) 666 { 667 if (obj == NULL) 668 return NULL; 669 670 return obj->data; 671 } 672 LCRYPTO_ALIAS(OBJ_get0_data); 673