1/*
2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include "crypto/ctype.h"
12#include <limits.h>
13#include "internal/cryptlib.h"
14#include <openssl/lhash.h>
15#include <openssl/asn1.h>
16#include "crypto/objects.h"
17#include <openssl/bn.h>
18#include "crypto/asn1.h"
19#include "obj_local.h"
20
21/* obj_dat.h is generated from objects.h by obj_dat.pl */
22#include "obj_dat.h"
23
24DECLARE_OBJ_BSEARCH_CMP_FN(const ASN1_OBJECT *, unsigned int, sn);
25DECLARE_OBJ_BSEARCH_CMP_FN(const ASN1_OBJECT *, unsigned int, ln);
26DECLARE_OBJ_BSEARCH_CMP_FN(const ASN1_OBJECT *, unsigned int, obj);
27
28#define ADDED_DATA 0
29#define ADDED_SNAME 1
30#define ADDED_LNAME 2
31#define ADDED_NID 3
32
33struct added_obj_st {
34 int type;
35 ASN1_OBJECT *obj;
36};
37
38static int new_nid = NUM_NID;
39static LHASH_OF(ADDED_OBJ) *added = NULL;
40
41static int sn_cmp(const ASN1_OBJECT *const *a, const unsigned int *b)
42{
43 return strcmp((*a)->sn, nid_objs[*b].sn);
44}
45
46IMPLEMENT_OBJ_BSEARCH_CMP_FN(const ASN1_OBJECT *, unsigned int, sn);
47
48static int ln_cmp(const ASN1_OBJECT *const *a, const unsigned int *b)
49{
50 return strcmp((*a)->ln, nid_objs[*b].ln);
51}
52
53IMPLEMENT_OBJ_BSEARCH_CMP_FN(const ASN1_OBJECT *, unsigned int, ln);
54
55static unsigned long added_obj_hash(const ADDED_OBJ *ca)
56{
57 const ASN1_OBJECT *a;
58 int i;
59 unsigned long ret = 0;
60 unsigned char *p;
61
62 a = ca->obj;
63 switch (ca->type) {
64 case ADDED_DATA:
65 ret = a->length << 20L;
66 p = (unsigned char *)a->data;
67 for (i = 0; i < a->length; i++)
68 ret ^= p[i] << ((i * 3) % 24);
69 break;
70 case ADDED_SNAME:
71 ret = OPENSSL_LH_strhash(a->sn);
72 break;
73 case ADDED_LNAME:
74 ret = OPENSSL_LH_strhash(a->ln);
75 break;
76 case ADDED_NID:
77 ret = a->nid;
78 break;
79 default:
80 /* abort(); */
81 return 0;
82 }
83 ret &= 0x3fffffffL;
84 ret |= ((unsigned long)ca->type) << 30L;
85 return ret;
86}
87
88static int added_obj_cmp(const ADDED_OBJ *ca, const ADDED_OBJ *cb)
89{
90 ASN1_OBJECT *a, *b;
91 int i;
92
93 i = ca->type - cb->type;
94 if (i)
95 return i;
96 a = ca->obj;
97 b = cb->obj;
98 switch (ca->type) {
99 case ADDED_DATA:
100 i = (a->length - b->length);
101 if (i)
102 return i;
103 return memcmp(a->data, b->data, (size_t)a->length);
104 case ADDED_SNAME:
105 if (a->sn == NULL)
106 return -1;
107 else if (b->sn == NULL)
108 return 1;
109 else
110 return strcmp(a->sn, b->sn);
111 case ADDED_LNAME:
112 if (a->ln == NULL)
113 return -1;
114 else if (b->ln == NULL)
115 return 1;
116 else
117 return strcmp(a->ln, b->ln);
118 case ADDED_NID:
119 return a->nid - b->nid;
120 default:
121 /* abort(); */
122 return 0;
123 }
124}
125
126static int init_added(void)
127{
128 if (added != NULL)
129 return 1;
130 added = lh_ADDED_OBJ_new(added_obj_hash, added_obj_cmp);
131 return added != NULL;
132}
133
134static void cleanup1_doall(ADDED_OBJ *a)
135{
136 a->obj->nid = 0;
137 a->obj->flags |= ASN1_OBJECT_FLAG_DYNAMIC |
138 ASN1_OBJECT_FLAG_DYNAMIC_STRINGS | ASN1_OBJECT_FLAG_DYNAMIC_DATA;
139}
140
141static void cleanup2_doall(ADDED_OBJ *a)
142{
143 a->obj->nid++;
144}
145
146static void cleanup3_doall(ADDED_OBJ *a)
147{
148 if (--a->obj->nid == 0)
149 ASN1_OBJECT_free(a->obj);
150 OPENSSL_free(a);
151}
152
153void obj_cleanup_int(void)
154{
155 if (added == NULL)
156 return;
157 lh_ADDED_OBJ_set_down_load(added, 0);
158 lh_ADDED_OBJ_doall(added, cleanup1_doall); /* zero counters */
159 lh_ADDED_OBJ_doall(added, cleanup2_doall); /* set counters */
160 lh_ADDED_OBJ_doall(added, cleanup3_doall); /* free objects */
161 lh_ADDED_OBJ_free(added);
162 added = NULL;
163}
164
165int OBJ_new_nid(int num)
166{
167 int i;
168
169 i = new_nid;
170 new_nid += num;
171 return i;
172}
173
174int OBJ_add_object(const ASN1_OBJECT *obj)
175{
176 ASN1_OBJECT *o;
177 ADDED_OBJ *ao[4] = { NULL, NULL, NULL, NULL }, *aop;
178 int i;
179
180 if (added == NULL)
181 if (!init_added())
182 return 0;
183 if ((o = OBJ_dup(obj)) == NULL)
184 goto err;
185 if ((ao[ADDED_NID] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL)
186 goto err2;
187 if ((o->length != 0) && (obj->data != NULL))
188 if ((ao[ADDED_DATA] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL)
189 goto err2;
190 if (o->sn != NULL)
191 if ((ao[ADDED_SNAME] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL)
192 goto err2;
193 if (o->ln != NULL)
194 if ((ao[ADDED_LNAME] = OPENSSL_malloc(sizeof(*ao[0]))) == NULL)
195 goto err2;
196
197 for (i = ADDED_DATA; i <= ADDED_NID; i++) {
198 if (ao[i] != NULL) {
199 ao[i]->type = i;
200 ao[i]->obj = o;
201 aop = lh_ADDED_OBJ_insert(added, ao[i]);
202 /* memory leak, but should not normally matter */
203 OPENSSL_free(aop);
204 }
205 }
206 o->flags &=
207 ~(ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
208 ASN1_OBJECT_FLAG_DYNAMIC_DATA);
209
210 return o->nid;
211 err2:
212 OBJerr(OBJ_F_OBJ_ADD_OBJECT, ERR_R_MALLOC_FAILURE);
213 err:
214 for (i = ADDED_DATA; i <= ADDED_NID; i++)
215 OPENSSL_free(ao[i]);
216 ASN1_OBJECT_free(o);
217 return NID_undef;
218}
219
220ASN1_OBJECT *OBJ_nid2obj(int n)
221{
222 ADDED_OBJ ad, *adp;
223 ASN1_OBJECT ob;
224
225 if ((n >= 0) && (n < NUM_NID)) {
226 if ((n != NID_undef) && (nid_objs[n].nid == NID_undef)) {
227 OBJerr(OBJ_F_OBJ_NID2OBJ, OBJ_R_UNKNOWN_NID);
228 return NULL;
229 }
230 return (ASN1_OBJECT *)&(nid_objs[n]);
231 }
232
233 /* Make sure we've loaded config before checking for any "added" objects */
234 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
235
236 if (added == NULL)
237 return NULL;
238
239 ad.type = ADDED_NID;
240 ad.obj = &ob;
241 ob.nid = n;
242 adp = lh_ADDED_OBJ_retrieve(added, &ad);
243 if (adp != NULL)
244 return adp->obj;
245
246 OBJerr(OBJ_F_OBJ_NID2OBJ, OBJ_R_UNKNOWN_NID);
247 return NULL;
248}
249
250const char *OBJ_nid2sn(int n)
251{
252 ADDED_OBJ ad, *adp;
253 ASN1_OBJECT ob;
254
255 if ((n >= 0) && (n < NUM_NID)) {
256 if ((n != NID_undef) && (nid_objs[n].nid == NID_undef)) {
257 OBJerr(OBJ_F_OBJ_NID2SN, OBJ_R_UNKNOWN_NID);
258 return NULL;
259 }
260 return nid_objs[n].sn;
261 }
262
263 /* Make sure we've loaded config before checking for any "added" objects */
264 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
265
266 if (added == NULL)
267 return NULL;
268
269 ad.type = ADDED_NID;
270 ad.obj = &ob;
271 ob.nid = n;
272 adp = lh_ADDED_OBJ_retrieve(added, &ad);
273 if (adp != NULL)
274 return adp->obj->sn;
275
276 OBJerr(OBJ_F_OBJ_NID2SN, OBJ_R_UNKNOWN_NID);
277 return NULL;
278}
279
280const char *OBJ_nid2ln(int n)
281{
282 ADDED_OBJ ad, *adp;
283 ASN1_OBJECT ob;
284
285 if ((n >= 0) && (n < NUM_NID)) {
286 if ((n != NID_undef) && (nid_objs[n].nid == NID_undef)) {
287 OBJerr(OBJ_F_OBJ_NID2LN, OBJ_R_UNKNOWN_NID);
288 return NULL;
289 }
290 return nid_objs[n].ln;
291 }
292
293 /* Make sure we've loaded config before checking for any "added" objects */
294 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
295
296 if (added == NULL)
297 return NULL;
298
299 ad.type = ADDED_NID;
300 ad.obj = &ob;
301 ob.nid = n;
302 adp = lh_ADDED_OBJ_retrieve(added, &ad);
303 if (adp != NULL)
304 return adp->obj->ln;
305
306 OBJerr(OBJ_F_OBJ_NID2LN, OBJ_R_UNKNOWN_NID);
307 return NULL;
308}
309
310static int obj_cmp(const ASN1_OBJECT *const *ap, const unsigned int *bp)
311{
312 int j;
313 const ASN1_OBJECT *a = *ap;
314 const ASN1_OBJECT *b = &nid_objs[*bp];
315
316 j = (a->length - b->length);
317 if (j)
318 return j;
319 if (a->length == 0)
320 return 0;
321 return memcmp(a->data, b->data, a->length);
322}
323
324IMPLEMENT_OBJ_BSEARCH_CMP_FN(const ASN1_OBJECT *, unsigned int, obj);
325
326int OBJ_obj2nid(const ASN1_OBJECT *a)
327{
328 const unsigned int *op;
329 ADDED_OBJ ad, *adp;
330
331 if (a == NULL)
332 return NID_undef;
333 if (a->nid != 0)
334 return a->nid;
335
336 if (a->length == 0)
337 return NID_undef;
338
339 /* Make sure we've loaded config before checking for any "added" objects */
340 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
341
342 if (added != NULL) {
343 ad.type = ADDED_DATA;
344 ad.obj = (ASN1_OBJECT *)a; /* XXX: ugly but harmless */
345 adp = lh_ADDED_OBJ_retrieve(added, &ad);
346 if (adp != NULL)
347 return adp->obj->nid;
348 }
349 op = OBJ_bsearch_obj(&a, obj_objs, NUM_OBJ);
350 if (op == NULL)
351 return NID_undef;
352 return nid_objs[*op].nid;
353}
354
355/*
356 * Convert an object name into an ASN1_OBJECT if "noname" is not set then
357 * search for short and long names first. This will convert the "dotted" form
358 * into an object: unlike OBJ_txt2nid it can be used with any objects, not
359 * just registered ones.
360 */
361
362ASN1_OBJECT *OBJ_txt2obj(const char *s, int no_name)
363{
364 int nid = NID_undef;
365 ASN1_OBJECT *op;
366 unsigned char *buf;
367 unsigned char *p;
368 const unsigned char *cp;
369 int i, j;
370
371 if (!no_name) {
372 if (((nid = OBJ_sn2nid(s)) != NID_undef) ||
373 ((nid = OBJ_ln2nid(s)) != NID_undef))
374 return OBJ_nid2obj(nid);
375 }
376
377 /* Work out size of content octets */
378 i = a2d_ASN1_OBJECT(NULL, 0, s, -1);
379 if (i <= 0) {
380 /* Don't clear the error */
381 /*
382 * ERR_clear_error();
383 */
384 return NULL;
385 }
386 /* Work out total size */
387 j = ASN1_object_size(0, i, V_ASN1_OBJECT);
388 if (j < 0)
389 return NULL;
390
391 if ((buf = OPENSSL_malloc(j)) == NULL) {
392 OBJerr(OBJ_F_OBJ_TXT2OBJ, ERR_R_MALLOC_FAILURE);
393 return NULL;
394 }
395
396 p = buf;
397 /* Write out tag+length */
398 ASN1_put_object(&p, 0, i, V_ASN1_OBJECT, V_ASN1_UNIVERSAL);
399 /* Write out contents */
400 a2d_ASN1_OBJECT(p, i, s, -1);
401
402 cp = buf;
403 op = d2i_ASN1_OBJECT(NULL, &cp, j);
404 OPENSSL_free(buf);
405 return op;
406}
407
408int OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *a, int no_name)
409{
410 int i, n = 0, len, nid, first, use_bn;
411 BIGNUM *bl;
412 unsigned long l;
413 const unsigned char *p;
414 char tbuf[DECIMAL_SIZE(i) + DECIMAL_SIZE(l) + 2];
415
416 /* Ensure that, at every state, |buf| is NUL-terminated. */
417 if (buf && buf_len > 0)
418 buf[0] = '\0';
419
420 if ((a == NULL) || (a->data == NULL))
421 return 0;
422
423 if (!no_name && (nid = OBJ_obj2nid(a)) != NID_undef) {
424 const char *s;
425 s = OBJ_nid2ln(nid);
426 if (s == NULL)
427 s = OBJ_nid2sn(nid);
428 if (s) {
429 if (buf)
430 OPENSSL_strlcpy(buf, s, buf_len);
431 n = strlen(s);
432 return n;
433 }
434 }
435
436 len = a->length;
437 p = a->data;
438
439 first = 1;
440 bl = NULL;
441
442 while (len > 0) {
443 l = 0;
444 use_bn = 0;
445 for (;;) {
446 unsigned char c = *p++;
447 len--;
448 if ((len == 0) && (c & 0x80))
449 goto err;
450 if (use_bn) {
451 if (!BN_add_word(bl, c & 0x7f))
452 goto err;
453 } else
454 l |= c & 0x7f;
455 if (!(c & 0x80))
456 break;
457 if (!use_bn && (l > (ULONG_MAX >> 7L))) {
458 if (bl == NULL && (bl = BN_new()) == NULL)
459 goto err;
460 if (!BN_set_word(bl, l))
461 goto err;
462 use_bn = 1;
463 }
464 if (use_bn) {
465 if (!BN_lshift(bl, bl, 7))
466 goto err;
467 } else
468 l <<= 7L;
469 }
470
471 if (first) {
472 first = 0;
473 if (l >= 80) {
474 i = 2;
475 if (use_bn) {
476 if (!BN_sub_word(bl, 80))
477 goto err;
478 } else
479 l -= 80;
480 } else {
481 i = (int)(l / 40);
482 l -= (long)(i * 40);
483 }
484 if (buf && (buf_len > 1)) {
485 *buf++ = i + '0';
486 *buf = '\0';
487 buf_len--;
488 }
489 n++;
490 }
491
492 if (use_bn) {
493 char *bndec;
494 bndec = BN_bn2dec(bl);
495 if (!bndec)
496 goto err;
497 i = strlen(bndec);
498 if (buf) {
499 if (buf_len > 1) {
500 *buf++ = '.';
501 *buf = '\0';
502 buf_len--;
503 }
504 OPENSSL_strlcpy(buf, bndec, buf_len);
505 if (i > buf_len) {
506 buf += buf_len;
507 buf_len = 0;
508 } else {
509 buf += i;
510 buf_len -= i;
511 }
512 }
513 n++;
514 n += i;
515 OPENSSL_free(bndec);
516 } else {
517 BIO_snprintf(tbuf, sizeof(tbuf), ".%lu", l);
518 i = strlen(tbuf);
519 if (buf && (buf_len > 0)) {
520 OPENSSL_strlcpy(buf, tbuf, buf_len);
521 if (i > buf_len) {
522 buf += buf_len;
523 buf_len = 0;
524 } else {
525 buf += i;
526 buf_len -= i;
527 }
528 }
529 n += i;
530 l = 0;
531 }
532 }
533
534 BN_free(bl);
535 return n;
536
537 err:
538 BN_free(bl);
539 return -1;
540}
541
542int OBJ_txt2nid(const char *s)
543{
544 ASN1_OBJECT *obj;
545 int nid;
546 obj = OBJ_txt2obj(s, 0);
547 nid = OBJ_obj2nid(obj);
548 ASN1_OBJECT_free(obj);
549 return nid;
550}
551
552int OBJ_ln2nid(const char *s)
553{
554 ASN1_OBJECT o;
555 const ASN1_OBJECT *oo = &o;
556 ADDED_OBJ ad, *adp;
557 const unsigned int *op;
558
559 /* Make sure we've loaded config before checking for any "added" objects */
560 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
561
562 o.ln = s;
563 if (added != NULL) {
564 ad.type = ADDED_LNAME;
565 ad.obj = &o;
566 adp = lh_ADDED_OBJ_retrieve(added, &ad);
567 if (adp != NULL)
568 return adp->obj->nid;
569 }
570 op = OBJ_bsearch_ln(&oo, ln_objs, NUM_LN);
571 if (op == NULL)
572 return NID_undef;
573 return nid_objs[*op].nid;
574}
575
576int OBJ_sn2nid(const char *s)
577{
578 ASN1_OBJECT o;
579 const ASN1_OBJECT *oo = &o;
580 ADDED_OBJ ad, *adp;
581 const unsigned int *op;
582
583 /* Make sure we've loaded config before checking for any "added" objects */
584 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
585
586 o.sn = s;
587 if (added != NULL) {
588 ad.type = ADDED_SNAME;
589 ad.obj = &o;
590 adp = lh_ADDED_OBJ_retrieve(added, &ad);
591 if (adp != NULL)
592 return adp->obj->nid;
593 }
594 op = OBJ_bsearch_sn(&oo, sn_objs, NUM_SN);
595 if (op == NULL)
596 return NID_undef;
597 return nid_objs[*op].nid;
598}
599
600const void *OBJ_bsearch_(const void *key, const void *base, int num, int size,
601 int (*cmp) (const void *, const void *))
602{
603 return OBJ_bsearch_ex_(key, base, num, size, cmp, 0);
604}
605
606const void *OBJ_bsearch_ex_(const void *key, const void *base, int num,
607 int size,
608 int (*cmp) (const void *, const void *),
609 int flags)
610{
611 const char *p = ossl_bsearch(key, base, num, size, cmp, flags);
612
613#ifdef CHARSET_EBCDIC
614 /*
615 * THIS IS A KLUDGE - Because the *_obj is sorted in ASCII order, and I
616 * don't have perl (yet), we revert to a *LINEAR* search when the object
617 * wasn't found in the binary search.
618 */
619 if (p == NULL) {
620 const char *base_ = base;
621 int l, h, i = 0, c = 0;
622
623 for (i = 0; i < num; ++i) {
624 p = &(base_[i * size]);
625 c = (*cmp) (key, p);
626 if (c == 0
627 || (c < 0 && (flags & OBJ_BSEARCH_VALUE_ON_NOMATCH)))
628 return p;
629 }
630 }
631#endif
632 return p;
633}
634
635/*
636 * Parse a BIO sink to create some extra oid's objects.
637 * Line format:<OID:isdigit or '.']><isspace><SN><isspace><LN>
638 */
639int OBJ_create_objects(BIO *in)
640{
641 char buf[512];
642 int i, num = 0;
643 char *o, *s, *l = NULL;
644
645 for (;;) {
646 s = o = NULL;
647 i = BIO_gets(in, buf, 512);
648 if (i <= 0)
649 return num;
650 buf[i - 1] = '\0';
651 if (!ossl_isalnum(buf[0]))
652 return num;
653 o = s = buf;
654 while (ossl_isdigit(*s) || *s == '.')
655 s++;
656 if (*s != '\0') {
657 *(s++) = '\0';
658 while (ossl_isspace(*s))
659 s++;
660 if (*s == '\0') {
661 s = NULL;
662 } else {
663 l = s;
664 while (*l != '\0' && !ossl_isspace(*l))
665 l++;
666 if (*l != '\0') {
667 *(l++) = '\0';
668 while (ossl_isspace(*l))
669 l++;
670 if (*l == '\0') {
671 l = NULL;
672 }
673 } else {
674 l = NULL;
675 }
676 }
677 } else {
678 s = NULL;
679 }
680 if (*o == '\0')
681 return num;
682 if (!OBJ_create(o, s, l))
683 return num;
684 num++;
685 }
686}
687
688int OBJ_create(const char *oid, const char *sn, const char *ln)
689{
690 ASN1_OBJECT *tmpoid = NULL;
691 int ok = 0;
692
693 /* Check to see if short or long name already present */
694 if ((sn != NULL && OBJ_sn2nid(sn) != NID_undef)
695 || (ln != NULL && OBJ_ln2nid(ln) != NID_undef)) {
696 OBJerr(OBJ_F_OBJ_CREATE, OBJ_R_OID_EXISTS);
697 return 0;
698 }
699
700 /* Convert numerical OID string to an ASN1_OBJECT structure */
701 tmpoid = OBJ_txt2obj(oid, 1);
702 if (tmpoid == NULL)
703 return 0;
704
705 /* If NID is not NID_undef then object already exists */
706 if (OBJ_obj2nid(tmpoid) != NID_undef) {
707 OBJerr(OBJ_F_OBJ_CREATE, OBJ_R_OID_EXISTS);
708 goto err;
709 }
710
711 tmpoid->nid = OBJ_new_nid(1);
712 tmpoid->sn = (char *)sn;
713 tmpoid->ln = (char *)ln;
714
715 ok = OBJ_add_object(tmpoid);
716
717 tmpoid->sn = NULL;
718 tmpoid->ln = NULL;
719
720 err:
721 ASN1_OBJECT_free(tmpoid);
722 return ok;
723}
724
725size_t OBJ_length(const ASN1_OBJECT *obj)
726{
727 if (obj == NULL)
728 return 0;
729 return obj->length;
730}
731
732const unsigned char *OBJ_get0_data(const ASN1_OBJECT *obj)
733{
734 if (obj == NULL)
735 return NULL;
736 return obj->data;
737}
738