1 /* $OpenBSD: obj_dat.c,v 1.74 2023/12/14 18:09:35 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 nid) 283 { 284 if (nid >= 0 && nid < NUM_NID) { 285 if (nid == NID_undef || nid_objs[nid].nid != NID_undef) 286 return (ASN1_OBJECT *)&nid_objs[nid]; 287 288 goto unknown; 289 } 290 291 /* XXX - locking. */ 292 if (added != NULL) { 293 ASN1_OBJECT aobj = { 294 .nid = nid, 295 }; 296 ADDED_OBJ needle = { 297 .type = ADDED_NID, 298 .obj = &aobj, 299 }; 300 ADDED_OBJ *found; 301 302 if ((found = lh_ADDED_OBJ_retrieve(added, &needle)) != NULL) 303 return found->obj; 304 } 305 306 unknown: 307 OBJerror(OBJ_R_UNKNOWN_NID); 308 309 return NULL; 310 } 311 LCRYPTO_ALIAS(OBJ_nid2obj); 312 313 const char * 314 OBJ_nid2sn(int nid) 315 { 316 ASN1_OBJECT *aobj; 317 318 if ((aobj = OBJ_nid2obj(nid)) == NULL) 319 return NULL; 320 321 return aobj->sn; 322 } 323 LCRYPTO_ALIAS(OBJ_nid2sn); 324 325 const char * 326 OBJ_nid2ln(int nid) 327 { 328 ASN1_OBJECT *aobj; 329 330 if ((aobj = OBJ_nid2obj(nid)) == NULL) 331 return NULL; 332 333 return aobj->ln; 334 } 335 LCRYPTO_ALIAS(OBJ_nid2ln); 336 337 static int 338 obj_objs_cmp(const void *aobj, const void *b) 339 { 340 const unsigned int *nid = b; 341 342 OPENSSL_assert(*nid >= 0 && *nid < NUM_NID); 343 344 return OBJ_cmp(aobj, &nid_objs[*nid]); 345 } 346 347 int 348 OBJ_obj2nid(const ASN1_OBJECT *aobj) 349 { 350 const unsigned int *nid; 351 352 if (aobj == NULL || aobj->length == 0) 353 return NID_undef; 354 355 if (aobj->nid != NID_undef) 356 return aobj->nid; 357 358 /* XXX - locking. OpenSSL 3 moved this after built-in object lookup. */ 359 if (added != NULL) { 360 ADDED_OBJ needle = { 361 .type = ADDED_DATA, 362 .obj = (ASN1_OBJECT *)aobj, 363 }; 364 ADDED_OBJ *found; 365 366 if ((found = lh_ADDED_OBJ_retrieve(added, &needle)) != NULL) 367 return found->obj->nid; 368 } 369 370 /* obj_objs holds built-in obj NIDs in ascending OBJ_cmp() order. */ 371 nid = bsearch(aobj, obj_objs, NUM_OBJ, sizeof(unsigned int), obj_objs_cmp); 372 if (nid != NULL) 373 return *nid; 374 375 return NID_undef; 376 } 377 LCRYPTO_ALIAS(OBJ_obj2nid); 378 379 static int 380 ln_objs_cmp(const void *ln, const void *b) 381 { 382 const unsigned int *nid = b; 383 384 OPENSSL_assert(*nid >= 0 && *nid < NUM_NID); 385 386 return strcmp(ln, nid_objs[*nid].ln); 387 } 388 389 int 390 OBJ_ln2nid(const char *ln) 391 { 392 const unsigned int *nid; 393 394 /* XXX - locking. OpenSSL 3 moved this after built-in object lookup. */ 395 if (added != NULL) { 396 ASN1_OBJECT aobj = { 397 .ln = ln, 398 }; 399 ADDED_OBJ needle = { 400 .type = ADDED_LNAME, 401 .obj = &aobj, 402 }; 403 ADDED_OBJ *found; 404 405 if ((found = lh_ADDED_OBJ_retrieve(added, &needle)) != NULL) 406 return found->obj->nid; 407 } 408 409 /* ln_objs holds NIDs in ascending alphabetical order of LN. */ 410 nid = bsearch(ln, ln_objs, NUM_LN, sizeof(unsigned int), ln_objs_cmp); 411 if (nid != NULL) 412 return *nid; 413 414 return NID_undef; 415 } 416 LCRYPTO_ALIAS(OBJ_ln2nid); 417 418 static int 419 sn_objs_cmp(const void *sn, const void *b) 420 { 421 const unsigned int *nid = b; 422 423 OPENSSL_assert(*nid >= 0 && *nid < NUM_NID); 424 425 return strcmp(sn, nid_objs[*nid].sn); 426 } 427 428 int 429 OBJ_sn2nid(const char *sn) 430 { 431 const unsigned int *nid; 432 433 /* XXX - locking. OpenSSL 3 moved this after built-in object lookup. */ 434 if (added != NULL) { 435 ASN1_OBJECT aobj = { 436 .sn = sn, 437 }; 438 ADDED_OBJ needle = { 439 .type = ADDED_SNAME, 440 .obj = &aobj, 441 }; 442 ADDED_OBJ *found; 443 444 if ((found = lh_ADDED_OBJ_retrieve(added, &needle)) != NULL) 445 return found->obj->nid; 446 } 447 448 /* sn_objs holds NIDs in ascending alphabetical order of SN. */ 449 nid = bsearch(sn, sn_objs, NUM_SN, sizeof(unsigned int), sn_objs_cmp); 450 if (nid != NULL) 451 return *nid; 452 453 return NID_undef; 454 } 455 LCRYPTO_ALIAS(OBJ_sn2nid); 456 457 const void * 458 OBJ_bsearch_(const void *key, const void *base, int num, int size, 459 int (*cmp)(const void *, const void *)) 460 { 461 return OBJ_bsearch_ex_(key, base, num, size, cmp, 0); 462 } 463 LCRYPTO_ALIAS(OBJ_bsearch_); 464 465 const void * 466 OBJ_bsearch_ex_(const void *key, const void *base_, int num, int size, 467 int (*cmp)(const void *, const void *), int flags) 468 { 469 const char *base = base_; 470 int l, h, i = 0, c = 0; 471 const char *p = NULL; 472 473 if (num == 0) 474 return (NULL); 475 l = 0; 476 h = num; 477 while (l < h) { 478 i = (l + h) / 2; 479 p = &(base[i * size]); 480 c = (*cmp)(key, p); 481 if (c < 0) 482 h = i; 483 else if (c > 0) 484 l = i + 1; 485 else 486 break; 487 } 488 if (c != 0 && !(flags & OBJ_BSEARCH_VALUE_ON_NOMATCH)) 489 p = NULL; 490 else if (c == 0 && (flags & OBJ_BSEARCH_FIRST_VALUE_ON_MATCH)) { 491 while (i > 0 && (*cmp)(key, &(base[(i - 1) * size])) == 0) 492 i--; 493 p = &(base[i * size]); 494 } 495 return (p); 496 } 497 498 /* Convert an object name into an ASN1_OBJECT 499 * if "noname" is not set then search for short and long names first. 500 * This will convert the "dotted" form into an object: unlike OBJ_txt2nid 501 * it can be used with any objects, not just registered ones. 502 */ 503 504 ASN1_OBJECT * 505 OBJ_txt2obj(const char *s, int no_name) 506 { 507 int nid; 508 509 if (!no_name) { 510 if ((nid = OBJ_sn2nid(s)) != NID_undef || 511 (nid = OBJ_ln2nid(s)) != NID_undef) 512 return OBJ_nid2obj(nid); 513 } 514 515 return t2i_ASN1_OBJECT_internal(s); 516 } 517 LCRYPTO_ALIAS(OBJ_txt2obj); 518 519 int 520 OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *aobj, int no_name) 521 { 522 return i2t_ASN1_OBJECT_internal(aobj, buf, buf_len, no_name); 523 } 524 LCRYPTO_ALIAS(OBJ_obj2txt); 525 526 int 527 OBJ_txt2nid(const char *s) 528 { 529 ASN1_OBJECT *obj; 530 int nid; 531 532 obj = OBJ_txt2obj(s, 0); 533 nid = OBJ_obj2nid(obj); 534 ASN1_OBJECT_free(obj); 535 return nid; 536 } 537 LCRYPTO_ALIAS(OBJ_txt2nid); 538 539 int 540 OBJ_create_objects(BIO *in) 541 { 542 char buf[512]; 543 int i, num = 0; 544 char *o, *s, *l = NULL; 545 546 for (;;) { 547 s = o = NULL; 548 i = BIO_gets(in, buf, 512); 549 if (i <= 0) 550 return (num); 551 buf[i - 1] = '\0'; 552 if (!isalnum((unsigned char)buf[0])) 553 return (num); 554 o = s=buf; 555 while (isdigit((unsigned char)*s) || (*s == '.')) 556 s++; 557 if (*s != '\0') { 558 *(s++) = '\0'; 559 while (isspace((unsigned char)*s)) 560 s++; 561 if (*s == '\0') 562 s = NULL; 563 else { 564 l = s; 565 while ((*l != '\0') && 566 !isspace((unsigned char)*l)) 567 l++; 568 if (*l != '\0') { 569 *(l++) = '\0'; 570 while (isspace((unsigned char)*l)) 571 l++; 572 if (*l == '\0') 573 l = NULL; 574 } else 575 l = NULL; 576 } 577 } else 578 s = NULL; 579 if ((o == NULL) || (*o == '\0')) 580 return (num); 581 if (!OBJ_create(o, s, l)) 582 return (num); 583 num++; 584 } 585 /* return(num); */ 586 } 587 LCRYPTO_ALIAS(OBJ_create_objects); 588 589 int 590 OBJ_create(const char *oid, const char *sn, const char *ln) 591 { 592 int ok = 0; 593 ASN1_OBJECT *op = NULL; 594 unsigned char *buf; 595 int len; 596 597 len = a2d_ASN1_OBJECT(NULL, 0, oid, -1); 598 if (len <= 0) 599 return 0; 600 601 if ((buf = malloc(len)) == NULL) { 602 OBJerror(ERR_R_MALLOC_FAILURE); 603 return 0; 604 } 605 len = a2d_ASN1_OBJECT(buf, len, oid, -1); 606 if (len == 0) 607 goto err; 608 op = ASN1_OBJECT_create(OBJ_new_nid(1), buf, len, sn, ln); 609 if (op == NULL) 610 goto err; 611 ok = OBJ_add_object(op); 612 613 err: 614 ASN1_OBJECT_free(op); 615 free(buf); 616 return ok; 617 } 618 LCRYPTO_ALIAS(OBJ_create); 619 620 size_t 621 OBJ_length(const ASN1_OBJECT *obj) 622 { 623 if (obj == NULL) 624 return 0; 625 626 if (obj->length < 0) 627 return 0; 628 629 return obj->length; 630 } 631 LCRYPTO_ALIAS(OBJ_length); 632 633 const unsigned char * 634 OBJ_get0_data(const ASN1_OBJECT *obj) 635 { 636 if (obj == NULL) 637 return NULL; 638 639 return obj->data; 640 } 641 LCRYPTO_ALIAS(OBJ_get0_data); 642