1
2
3
4
5
6
7
8
9
10
11
12
13
14
15#include <crypto/hash.h>
16#include <linux/slab.h>
17#include <linux/types.h>
18#include <linux/scatterlist.h>
19#include <net/sctp/sctp.h>
20#include <net/sctp/auth.h>
21
22static struct sctp_hmac sctp_hmac_list[SCTP_AUTH_NUM_HMACS] = {
23 {
24
25 .hmac_id = SCTP_AUTH_HMAC_ID_RESERVED_0,
26 },
27 {
28 .hmac_id = SCTP_AUTH_HMAC_ID_SHA1,
29 .hmac_name = "hmac(sha1)",
30 .hmac_len = SCTP_SHA1_SIG_SIZE,
31 },
32 {
33
34 .hmac_id = SCTP_AUTH_HMAC_ID_RESERVED_2,
35 },
36#if IS_ENABLED(CONFIG_CRYPTO_SHA256)
37 {
38 .hmac_id = SCTP_AUTH_HMAC_ID_SHA256,
39 .hmac_name = "hmac(sha256)",
40 .hmac_len = SCTP_SHA256_SIG_SIZE,
41 }
42#endif
43};
44
45
46void sctp_auth_key_put(struct sctp_auth_bytes *key)
47{
48 if (!key)
49 return;
50
51 if (refcount_dec_and_test(&key->refcnt)) {
52 kfree_sensitive(key);
53 SCTP_DBG_OBJCNT_DEC(keys);
54 }
55}
56
57
58static struct sctp_auth_bytes *sctp_auth_create_key(__u32 key_len, gfp_t gfp)
59{
60 struct sctp_auth_bytes *key;
61
62
63 if (key_len > (INT_MAX - sizeof(struct sctp_auth_bytes)))
64 return NULL;
65
66
67 key = kmalloc(sizeof(struct sctp_auth_bytes) + key_len, gfp);
68 if (!key)
69 return NULL;
70
71 key->len = key_len;
72 refcount_set(&key->refcnt, 1);
73 SCTP_DBG_OBJCNT_INC(keys);
74
75 return key;
76}
77
78
79struct sctp_shared_key *sctp_auth_shkey_create(__u16 key_id, gfp_t gfp)
80{
81 struct sctp_shared_key *new;
82
83
84 new = kzalloc(sizeof(struct sctp_shared_key), gfp);
85 if (!new)
86 return NULL;
87
88 INIT_LIST_HEAD(&new->key_list);
89 refcount_set(&new->refcnt, 1);
90 new->key_id = key_id;
91
92 return new;
93}
94
95
96static void sctp_auth_shkey_destroy(struct sctp_shared_key *sh_key)
97{
98 BUG_ON(!list_empty(&sh_key->key_list));
99 sctp_auth_key_put(sh_key->key);
100 sh_key->key = NULL;
101 kfree(sh_key);
102}
103
104void sctp_auth_shkey_release(struct sctp_shared_key *sh_key)
105{
106 if (refcount_dec_and_test(&sh_key->refcnt))
107 sctp_auth_shkey_destroy(sh_key);
108}
109
110void sctp_auth_shkey_hold(struct sctp_shared_key *sh_key)
111{
112 refcount_inc(&sh_key->refcnt);
113}
114
115
116
117
118void sctp_auth_destroy_keys(struct list_head *keys)
119{
120 struct sctp_shared_key *ep_key;
121 struct sctp_shared_key *tmp;
122
123 if (list_empty(keys))
124 return;
125
126 key_for_each_safe(ep_key, tmp, keys) {
127 list_del_init(&ep_key->key_list);
128 sctp_auth_shkey_release(ep_key);
129 }
130}
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148static int sctp_auth_compare_vectors(struct sctp_auth_bytes *vector1,
149 struct sctp_auth_bytes *vector2)
150{
151 int diff;
152 int i;
153 const __u8 *longer;
154
155 diff = vector1->len - vector2->len;
156 if (diff) {
157 longer = (diff > 0) ? vector1->data : vector2->data;
158
159
160
161
162
163 for (i = 0; i < abs(diff); i++) {
164 if (longer[i] != 0)
165 return diff;
166 }
167 }
168
169
170 return memcmp(vector1->data, vector2->data, vector1->len);
171}
172
173
174
175
176
177
178
179
180
181
182
183
184static struct sctp_auth_bytes *sctp_auth_make_key_vector(
185 struct sctp_random_param *random,
186 struct sctp_chunks_param *chunks,
187 struct sctp_hmac_algo_param *hmacs,
188 gfp_t gfp)
189{
190 struct sctp_auth_bytes *new;
191 __u32 len;
192 __u32 offset = 0;
193 __u16 random_len, hmacs_len, chunks_len = 0;
194
195 random_len = ntohs(random->param_hdr.length);
196 hmacs_len = ntohs(hmacs->param_hdr.length);
197 if (chunks)
198 chunks_len = ntohs(chunks->param_hdr.length);
199
200 len = random_len + hmacs_len + chunks_len;
201
202 new = sctp_auth_create_key(len, gfp);
203 if (!new)
204 return NULL;
205
206 memcpy(new->data, random, random_len);
207 offset += random_len;
208
209 if (chunks) {
210 memcpy(new->data + offset, chunks, chunks_len);
211 offset += chunks_len;
212 }
213
214 memcpy(new->data + offset, hmacs, hmacs_len);
215
216 return new;
217}
218
219
220
221static struct sctp_auth_bytes *sctp_auth_make_local_vector(
222 const struct sctp_association *asoc,
223 gfp_t gfp)
224{
225 return sctp_auth_make_key_vector(
226 (struct sctp_random_param *)asoc->c.auth_random,
227 (struct sctp_chunks_param *)asoc->c.auth_chunks,
228 (struct sctp_hmac_algo_param *)asoc->c.auth_hmacs, gfp);
229}
230
231
232static struct sctp_auth_bytes *sctp_auth_make_peer_vector(
233 const struct sctp_association *asoc,
234 gfp_t gfp)
235{
236 return sctp_auth_make_key_vector(asoc->peer.peer_random,
237 asoc->peer.peer_chunks,
238 asoc->peer.peer_hmacs,
239 gfp);
240}
241
242
243
244
245
246
247
248
249
250
251
252static struct sctp_auth_bytes *sctp_auth_asoc_set_secret(
253 struct sctp_shared_key *ep_key,
254 struct sctp_auth_bytes *first_vector,
255 struct sctp_auth_bytes *last_vector,
256 gfp_t gfp)
257{
258 struct sctp_auth_bytes *secret;
259 __u32 offset = 0;
260 __u32 auth_len;
261
262 auth_len = first_vector->len + last_vector->len;
263 if (ep_key->key)
264 auth_len += ep_key->key->len;
265
266 secret = sctp_auth_create_key(auth_len, gfp);
267 if (!secret)
268 return NULL;
269
270 if (ep_key->key) {
271 memcpy(secret->data, ep_key->key->data, ep_key->key->len);
272 offset += ep_key->key->len;
273 }
274
275 memcpy(secret->data + offset, first_vector->data, first_vector->len);
276 offset += first_vector->len;
277
278 memcpy(secret->data + offset, last_vector->data, last_vector->len);
279
280 return secret;
281}
282
283
284
285
286static struct sctp_auth_bytes *sctp_auth_asoc_create_secret(
287 const struct sctp_association *asoc,
288 struct sctp_shared_key *ep_key,
289 gfp_t gfp)
290{
291 struct sctp_auth_bytes *local_key_vector;
292 struct sctp_auth_bytes *peer_key_vector;
293 struct sctp_auth_bytes *first_vector,
294 *last_vector;
295 struct sctp_auth_bytes *secret = NULL;
296 int cmp;
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311 local_key_vector = sctp_auth_make_local_vector(asoc, gfp);
312 peer_key_vector = sctp_auth_make_peer_vector(asoc, gfp);
313
314 if (!peer_key_vector || !local_key_vector)
315 goto out;
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330 cmp = sctp_auth_compare_vectors(local_key_vector,
331 peer_key_vector);
332 if (cmp < 0) {
333 first_vector = local_key_vector;
334 last_vector = peer_key_vector;
335 } else {
336 first_vector = peer_key_vector;
337 last_vector = local_key_vector;
338 }
339
340 secret = sctp_auth_asoc_set_secret(ep_key, first_vector, last_vector,
341 gfp);
342out:
343 sctp_auth_key_put(local_key_vector);
344 sctp_auth_key_put(peer_key_vector);
345
346 return secret;
347}
348
349
350
351
352
353int sctp_auth_asoc_copy_shkeys(const struct sctp_endpoint *ep,
354 struct sctp_association *asoc,
355 gfp_t gfp)
356{
357 struct sctp_shared_key *sh_key;
358 struct sctp_shared_key *new;
359
360 BUG_ON(!list_empty(&asoc->endpoint_shared_keys));
361
362 key_for_each(sh_key, &ep->endpoint_shared_keys) {
363 new = sctp_auth_shkey_create(sh_key->key_id, gfp);
364 if (!new)
365 goto nomem;
366
367 new->key = sh_key->key;
368 sctp_auth_key_hold(new->key);
369 list_add(&new->key_list, &asoc->endpoint_shared_keys);
370 }
371
372 return 0;
373
374nomem:
375 sctp_auth_destroy_keys(&asoc->endpoint_shared_keys);
376 return -ENOMEM;
377}
378
379
380
381
382
383int sctp_auth_asoc_init_active_key(struct sctp_association *asoc, gfp_t gfp)
384{
385 struct sctp_auth_bytes *secret;
386 struct sctp_shared_key *ep_key;
387 struct sctp_chunk *chunk;
388
389
390
391
392 if (!asoc->peer.auth_capable)
393 return 0;
394
395
396
397
398
399
400 ep_key = sctp_auth_get_shkey(asoc, asoc->active_key_id);
401 BUG_ON(!ep_key);
402
403 secret = sctp_auth_asoc_create_secret(asoc, ep_key, gfp);
404 if (!secret)
405 return -ENOMEM;
406
407 sctp_auth_key_put(asoc->asoc_shared_key);
408 asoc->asoc_shared_key = secret;
409 asoc->shkey = ep_key;
410
411
412
413
414 list_for_each_entry(chunk, &asoc->outqueue.out_chunk_list, list) {
415 if (sctp_auth_send_cid(chunk->chunk_hdr->type, asoc)) {
416 chunk->auth = 1;
417 if (!chunk->shkey) {
418 chunk->shkey = asoc->shkey;
419 sctp_auth_shkey_hold(chunk->shkey);
420 }
421 }
422 }
423
424 return 0;
425}
426
427
428
429struct sctp_shared_key *sctp_auth_get_shkey(
430 const struct sctp_association *asoc,
431 __u16 key_id)
432{
433 struct sctp_shared_key *key;
434
435
436 key_for_each(key, &asoc->endpoint_shared_keys) {
437 if (key->key_id == key_id) {
438 if (!key->deactivated)
439 return key;
440 break;
441 }
442 }
443
444 return NULL;
445}
446
447
448
449
450
451
452
453
454int sctp_auth_init_hmacs(struct sctp_endpoint *ep, gfp_t gfp)
455{
456 struct crypto_shash *tfm = NULL;
457 __u16 id;
458
459
460 if (ep->auth_hmacs)
461 return 0;
462
463
464 ep->auth_hmacs = kcalloc(SCTP_AUTH_NUM_HMACS,
465 sizeof(struct crypto_shash *),
466 gfp);
467 if (!ep->auth_hmacs)
468 return -ENOMEM;
469
470 for (id = 0; id < SCTP_AUTH_NUM_HMACS; id++) {
471
472
473
474
475
476
477 if (!sctp_hmac_list[id].hmac_name)
478 continue;
479
480
481 if (ep->auth_hmacs[id])
482 continue;
483
484
485 tfm = crypto_alloc_shash(sctp_hmac_list[id].hmac_name, 0, 0);
486 if (IS_ERR(tfm))
487 goto out_err;
488
489 ep->auth_hmacs[id] = tfm;
490 }
491
492 return 0;
493
494out_err:
495
496 sctp_auth_destroy_hmacs(ep->auth_hmacs);
497 ep->auth_hmacs = NULL;
498 return -ENOMEM;
499}
500
501
502void sctp_auth_destroy_hmacs(struct crypto_shash *auth_hmacs[])
503{
504 int i;
505
506 if (!auth_hmacs)
507 return;
508
509 for (i = 0; i < SCTP_AUTH_NUM_HMACS; i++) {
510 crypto_free_shash(auth_hmacs[i]);
511 }
512 kfree(auth_hmacs);
513}
514
515
516struct sctp_hmac *sctp_auth_get_hmac(__u16 hmac_id)
517{
518 return &sctp_hmac_list[hmac_id];
519}
520
521
522
523
524struct sctp_hmac *sctp_auth_asoc_get_hmac(const struct sctp_association *asoc)
525{
526 struct sctp_hmac_algo_param *hmacs;
527 __u16 n_elt;
528 __u16 id = 0;
529 int i;
530
531
532 if (asoc->default_hmac_id)
533 return &sctp_hmac_list[asoc->default_hmac_id];
534
535
536
537
538 hmacs = asoc->peer.peer_hmacs;
539 if (!hmacs)
540 return NULL;
541
542 n_elt = (ntohs(hmacs->param_hdr.length) -
543 sizeof(struct sctp_paramhdr)) >> 1;
544 for (i = 0; i < n_elt; i++) {
545 id = ntohs(hmacs->hmac_ids[i]);
546
547
548
549
550
551
552
553 if (id > SCTP_AUTH_HMAC_ID_MAX ||
554 !sctp_hmac_list[id].hmac_name) {
555 id = 0;
556 continue;
557 }
558
559 break;
560 }
561
562 if (id == 0)
563 return NULL;
564
565 return &sctp_hmac_list[id];
566}
567
568static int __sctp_auth_find_hmacid(__be16 *hmacs, int n_elts, __be16 hmac_id)
569{
570 int found = 0;
571 int i;
572
573 for (i = 0; i < n_elts; i++) {
574 if (hmac_id == hmacs[i]) {
575 found = 1;
576 break;
577 }
578 }
579
580 return found;
581}
582
583
584int sctp_auth_asoc_verify_hmac_id(const struct sctp_association *asoc,
585 __be16 hmac_id)
586{
587 struct sctp_hmac_algo_param *hmacs;
588 __u16 n_elt;
589
590 if (!asoc)
591 return 0;
592
593 hmacs = (struct sctp_hmac_algo_param *)asoc->c.auth_hmacs;
594 n_elt = (ntohs(hmacs->param_hdr.length) -
595 sizeof(struct sctp_paramhdr)) >> 1;
596
597 return __sctp_auth_find_hmacid(hmacs->hmac_ids, n_elt, hmac_id);
598}
599
600
601
602
603
604
605
606void sctp_auth_asoc_set_default_hmac(struct sctp_association *asoc,
607 struct sctp_hmac_algo_param *hmacs)
608{
609 struct sctp_endpoint *ep;
610 __u16 id;
611 int i;
612 int n_params;
613
614
615 if (asoc->default_hmac_id)
616 return;
617
618 n_params = (ntohs(hmacs->param_hdr.length) -
619 sizeof(struct sctp_paramhdr)) >> 1;
620 ep = asoc->ep;
621 for (i = 0; i < n_params; i++) {
622 id = ntohs(hmacs->hmac_ids[i]);
623
624
625 if (id > SCTP_AUTH_HMAC_ID_MAX)
626 continue;
627
628
629 if (ep->auth_hmacs[id]) {
630 asoc->default_hmac_id = id;
631 break;
632 }
633 }
634}
635
636
637
638static int __sctp_auth_cid(enum sctp_cid chunk, struct sctp_chunks_param *param)
639{
640 unsigned short len;
641 int found = 0;
642 int i;
643
644 if (!param || param->param_hdr.length == 0)
645 return 0;
646
647 len = ntohs(param->param_hdr.length) - sizeof(struct sctp_paramhdr);
648
649
650
651
652
653
654
655 for (i = 0; !found && i < len; i++) {
656 switch (param->chunks[i]) {
657 case SCTP_CID_INIT:
658 case SCTP_CID_INIT_ACK:
659 case SCTP_CID_SHUTDOWN_COMPLETE:
660 case SCTP_CID_AUTH:
661 break;
662
663 default:
664 if (param->chunks[i] == chunk)
665 found = 1;
666 break;
667 }
668 }
669
670 return found;
671}
672
673
674int sctp_auth_send_cid(enum sctp_cid chunk, const struct sctp_association *asoc)
675{
676 if (!asoc)
677 return 0;
678
679 if (!asoc->peer.auth_capable)
680 return 0;
681
682 return __sctp_auth_cid(chunk, asoc->peer.peer_chunks);
683}
684
685
686int sctp_auth_recv_cid(enum sctp_cid chunk, const struct sctp_association *asoc)
687{
688 if (!asoc)
689 return 0;
690
691 if (!asoc->peer.auth_capable)
692 return 0;
693
694 return __sctp_auth_cid(chunk,
695 (struct sctp_chunks_param *)asoc->c.auth_chunks);
696}
697
698
699
700
701
702
703
704
705
706
707void sctp_auth_calculate_hmac(const struct sctp_association *asoc,
708 struct sk_buff *skb, struct sctp_auth_chunk *auth,
709 struct sctp_shared_key *ep_key, gfp_t gfp)
710{
711 struct sctp_auth_bytes *asoc_key;
712 struct crypto_shash *tfm;
713 __u16 key_id, hmac_id;
714 unsigned char *end;
715 int free_key = 0;
716 __u8 *digest;
717
718
719
720
721
722 key_id = ntohs(auth->auth_hdr.shkey_id);
723 hmac_id = ntohs(auth->auth_hdr.hmac_id);
724
725 if (key_id == asoc->active_key_id)
726 asoc_key = asoc->asoc_shared_key;
727 else {
728
729 asoc_key = sctp_auth_asoc_create_secret(asoc, ep_key, gfp);
730 if (!asoc_key)
731 return;
732
733 free_key = 1;
734 }
735
736
737 end = skb_tail_pointer(skb);
738
739 tfm = asoc->ep->auth_hmacs[hmac_id];
740
741 digest = auth->auth_hdr.hmac;
742 if (crypto_shash_setkey(tfm, &asoc_key->data[0], asoc_key->len))
743 goto free;
744
745 crypto_shash_tfm_digest(tfm, (u8 *)auth, end - (unsigned char *)auth,
746 digest);
747
748free:
749 if (free_key)
750 sctp_auth_key_put(asoc_key);
751}
752
753
754
755
756int sctp_auth_ep_add_chunkid(struct sctp_endpoint *ep, __u8 chunk_id)
757{
758 struct sctp_chunks_param *p = ep->auth_chunk_list;
759 __u16 nchunks;
760 __u16 param_len;
761
762
763 if (__sctp_auth_cid(chunk_id, p))
764 return 0;
765
766
767 param_len = ntohs(p->param_hdr.length);
768 nchunks = param_len - sizeof(struct sctp_paramhdr);
769 if (nchunks == SCTP_NUM_CHUNK_TYPES)
770 return -EINVAL;
771
772 p->chunks[nchunks] = chunk_id;
773 p->param_hdr.length = htons(param_len + 1);
774 return 0;
775}
776
777
778int sctp_auth_ep_set_hmacs(struct sctp_endpoint *ep,
779 struct sctp_hmacalgo *hmacs)
780{
781 int has_sha1 = 0;
782 __u16 id;
783 int i;
784
785
786
787
788 for (i = 0; i < hmacs->shmac_num_idents; i++) {
789 id = hmacs->shmac_idents[i];
790
791 if (id > SCTP_AUTH_HMAC_ID_MAX)
792 return -EOPNOTSUPP;
793
794 if (SCTP_AUTH_HMAC_ID_SHA1 == id)
795 has_sha1 = 1;
796
797 if (!sctp_hmac_list[id].hmac_name)
798 return -EOPNOTSUPP;
799 }
800
801 if (!has_sha1)
802 return -EINVAL;
803
804 for (i = 0; i < hmacs->shmac_num_idents; i++)
805 ep->auth_hmacs_list->hmac_ids[i] =
806 htons(hmacs->shmac_idents[i]);
807 ep->auth_hmacs_list->param_hdr.length =
808 htons(sizeof(struct sctp_paramhdr) +
809 hmacs->shmac_num_idents * sizeof(__u16));
810 return 0;
811}
812
813
814
815
816
817int sctp_auth_set_key(struct sctp_endpoint *ep,
818 struct sctp_association *asoc,
819 struct sctp_authkey *auth_key)
820{
821 struct sctp_shared_key *cur_key, *shkey;
822 struct sctp_auth_bytes *key;
823 struct list_head *sh_keys;
824 int replace = 0;
825
826
827
828
829 if (asoc) {
830 if (!asoc->peer.auth_capable)
831 return -EACCES;
832 sh_keys = &asoc->endpoint_shared_keys;
833 } else {
834 if (!ep->auth_enable)
835 return -EACCES;
836 sh_keys = &ep->endpoint_shared_keys;
837 }
838
839 key_for_each(shkey, sh_keys) {
840 if (shkey->key_id == auth_key->sca_keynumber) {
841 replace = 1;
842 break;
843 }
844 }
845
846 cur_key = sctp_auth_shkey_create(auth_key->sca_keynumber, GFP_KERNEL);
847 if (!cur_key)
848 return -ENOMEM;
849
850
851 key = sctp_auth_create_key(auth_key->sca_keylength, GFP_KERNEL);
852 if (!key) {
853 kfree(cur_key);
854 return -ENOMEM;
855 }
856
857 memcpy(key->data, &auth_key->sca_key[0], auth_key->sca_keylength);
858 cur_key->key = key;
859
860 if (replace) {
861 list_del_init(&shkey->key_list);
862 sctp_auth_shkey_release(shkey);
863 }
864 list_add(&cur_key->key_list, sh_keys);
865
866 return 0;
867}
868
869int sctp_auth_set_active_key(struct sctp_endpoint *ep,
870 struct sctp_association *asoc,
871 __u16 key_id)
872{
873 struct sctp_shared_key *key;
874 struct list_head *sh_keys;
875 int found = 0;
876
877
878 if (asoc) {
879 if (!asoc->peer.auth_capable)
880 return -EACCES;
881 sh_keys = &asoc->endpoint_shared_keys;
882 } else {
883 if (!ep->auth_enable)
884 return -EACCES;
885 sh_keys = &ep->endpoint_shared_keys;
886 }
887
888 key_for_each(key, sh_keys) {
889 if (key->key_id == key_id) {
890 found = 1;
891 break;
892 }
893 }
894
895 if (!found || key->deactivated)
896 return -EINVAL;
897
898 if (asoc) {
899 asoc->active_key_id = key_id;
900 sctp_auth_asoc_init_active_key(asoc, GFP_KERNEL);
901 } else
902 ep->active_key_id = key_id;
903
904 return 0;
905}
906
907int sctp_auth_del_key_id(struct sctp_endpoint *ep,
908 struct sctp_association *asoc,
909 __u16 key_id)
910{
911 struct sctp_shared_key *key;
912 struct list_head *sh_keys;
913 int found = 0;
914
915
916
917
918 if (asoc) {
919 if (!asoc->peer.auth_capable)
920 return -EACCES;
921 if (asoc->active_key_id == key_id)
922 return -EINVAL;
923
924 sh_keys = &asoc->endpoint_shared_keys;
925 } else {
926 if (!ep->auth_enable)
927 return -EACCES;
928 if (ep->active_key_id == key_id)
929 return -EINVAL;
930
931 sh_keys = &ep->endpoint_shared_keys;
932 }
933
934 key_for_each(key, sh_keys) {
935 if (key->key_id == key_id) {
936 found = 1;
937 break;
938 }
939 }
940
941 if (!found)
942 return -EINVAL;
943
944
945 list_del_init(&key->key_list);
946 sctp_auth_shkey_release(key);
947
948 return 0;
949}
950
951int sctp_auth_deact_key_id(struct sctp_endpoint *ep,
952 struct sctp_association *asoc, __u16 key_id)
953{
954 struct sctp_shared_key *key;
955 struct list_head *sh_keys;
956 int found = 0;
957
958
959
960
961 if (asoc) {
962 if (!asoc->peer.auth_capable)
963 return -EACCES;
964 if (asoc->active_key_id == key_id)
965 return -EINVAL;
966
967 sh_keys = &asoc->endpoint_shared_keys;
968 } else {
969 if (!ep->auth_enable)
970 return -EACCES;
971 if (ep->active_key_id == key_id)
972 return -EINVAL;
973
974 sh_keys = &ep->endpoint_shared_keys;
975 }
976
977 key_for_each(key, sh_keys) {
978 if (key->key_id == key_id) {
979 found = 1;
980 break;
981 }
982 }
983
984 if (!found)
985 return -EINVAL;
986
987
988
989
990
991 if (asoc && !list_empty(&key->key_list) &&
992 refcount_read(&key->refcnt) == 1) {
993 struct sctp_ulpevent *ev;
994
995 ev = sctp_ulpevent_make_authkey(asoc, key->key_id,
996 SCTP_AUTH_FREE_KEY, GFP_KERNEL);
997 if (ev)
998 asoc->stream.si->enqueue_event(&asoc->ulpq, ev);
999 }
1000
1001 key->deactivated = 1;
1002
1003 return 0;
1004}
1005
1006int sctp_auth_init(struct sctp_endpoint *ep, gfp_t gfp)
1007{
1008 int err = -ENOMEM;
1009
1010
1011
1012
1013
1014 if (!ep->auth_hmacs_list) {
1015 struct sctp_hmac_algo_param *auth_hmacs;
1016
1017 auth_hmacs = kzalloc(struct_size(auth_hmacs, hmac_ids,
1018 SCTP_AUTH_NUM_HMACS), gfp);
1019 if (!auth_hmacs)
1020 goto nomem;
1021
1022
1023
1024
1025
1026 auth_hmacs->param_hdr.type = SCTP_PARAM_HMAC_ALGO;
1027 auth_hmacs->param_hdr.length =
1028 htons(sizeof(struct sctp_paramhdr) + 2);
1029 auth_hmacs->hmac_ids[0] = htons(SCTP_AUTH_HMAC_ID_SHA1);
1030 ep->auth_hmacs_list = auth_hmacs;
1031 }
1032
1033 if (!ep->auth_chunk_list) {
1034 struct sctp_chunks_param *auth_chunks;
1035
1036 auth_chunks = kzalloc(sizeof(*auth_chunks) +
1037 SCTP_NUM_CHUNK_TYPES, gfp);
1038 if (!auth_chunks)
1039 goto nomem;
1040
1041 auth_chunks->param_hdr.type = SCTP_PARAM_CHUNKS;
1042 auth_chunks->param_hdr.length =
1043 htons(sizeof(struct sctp_paramhdr));
1044 ep->auth_chunk_list = auth_chunks;
1045 }
1046
1047
1048
1049
1050 err = sctp_auth_init_hmacs(ep, gfp);
1051 if (err)
1052 goto nomem;
1053
1054 return 0;
1055
1056nomem:
1057
1058 kfree(ep->auth_hmacs_list);
1059 kfree(ep->auth_chunk_list);
1060 ep->auth_hmacs_list = NULL;
1061 ep->auth_chunk_list = NULL;
1062 return err;
1063}
1064
1065void sctp_auth_free(struct sctp_endpoint *ep)
1066{
1067 kfree(ep->auth_hmacs_list);
1068 kfree(ep->auth_chunk_list);
1069 ep->auth_hmacs_list = NULL;
1070 ep->auth_chunk_list = NULL;
1071 sctp_auth_destroy_hmacs(ep->auth_hmacs);
1072 ep->auth_hmacs = NULL;
1073}
1074