Bug Summary

File:netwerk/sctp/src/netinet/sctp_auth.c
Location:line 620, column 8
Description:Use of memory after it is freed

Annotated Source Code

1/*-
2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
15 *
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#ifdef __FreeBSD__
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: head/sys/netinet/sctp_auth.c 243882 2012-12-05 08:04:20Z glebius $");
36#endif
37
38#include <netinet/sctp_os.h>
39#include <netinet/sctp.h>
40#include <netinet/sctp_header.h>
41#include <netinet/sctp_pcb.h>
42#include <netinet/sctp_var.h>
43#include <netinet/sctp_sysctl.h>
44#include <netinet/sctputil.h>
45#include <netinet/sctp_indata.h>
46#include <netinet/sctp_output.h>
47#include <netinet/sctp_auth.h>
48
49#ifdef SCTP_DEBUG1
50#define SCTP_AUTH_DEBUG(system_base_info.sctpsysctl.sctp_debug_on & 0x00000400) (SCTP_BASE_SYSCTL(sctp_debug_on)system_base_info.sctpsysctl.sctp_debug_on & SCTP_DEBUG_AUTH10x00000400)
51#define SCTP_AUTH_DEBUG2(system_base_info.sctpsysctl.sctp_debug_on & 0x00000800) (SCTP_BASE_SYSCTL(sctp_debug_on)system_base_info.sctpsysctl.sctp_debug_on & SCTP_DEBUG_AUTH20x00000800)
52#endif /* SCTP_DEBUG */
53
54
55void
56sctp_clear_chunklist(sctp_auth_chklist_t *chklist)
57{
58 bzero(chklist, sizeof(*chklist));
59 /* chklist->num_chunks = 0; */
60}
61
62sctp_auth_chklist_t *
63sctp_alloc_chunklist(void)
64{
65 sctp_auth_chklist_t *chklist;
66
67 SCTP_MALLOC(chklist, sctp_auth_chklist_t *, sizeof(*chklist),do { ((chklist) = (sctp_auth_chklist_t *)malloc((u_long)(sizeof
(*chklist)))); do { if(0x0001 & 0x0100) { memset(chklist,
0,sizeof(*chklist)); } } while (0);; } while (0)
68 SCTP_M_AUTH_CL)do { ((chklist) = (sctp_auth_chklist_t *)malloc((u_long)(sizeof
(*chklist)))); do { if(0x0001 & 0x0100) { memset(chklist,
0,sizeof(*chklist)); } } while (0);; } while (0);
69 if (chklist == NULL((void*)0)) {
70 SCTPDBG(SCTP_DEBUG_AUTH1, "sctp_alloc_chunklist: failed to get memory!\n"){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("sctp_alloc_chunklist: failed to get memory!\n"); }; } } while
(0); };
71 } else {
72 sctp_clear_chunklist(chklist);
73 }
74 return (chklist);
75}
76
77void
78sctp_free_chunklist(sctp_auth_chklist_t *list)
79{
80 if (list != NULL((void*)0))
81 SCTP_FREE(list, SCTP_M_AUTH_CL)free((list));
82}
83
84sctp_auth_chklist_t *
85sctp_copy_chunklist(sctp_auth_chklist_t *list)
86{
87 sctp_auth_chklist_t *new_list;
88
89 if (list == NULL((void*)0))
90 return (NULL((void*)0));
91
92 /* get a new list */
93 new_list = sctp_alloc_chunklist();
94 if (new_list == NULL((void*)0))
95 return (NULL((void*)0));
96 /* copy it */
97 bcopy(list, new_list, sizeof(*new_list));
98
99 return (new_list);
100}
101
102
103/*
104 * add a chunk to the required chunks list
105 */
106int
107sctp_auth_add_chunk(uint8_t chunk, sctp_auth_chklist_t *list)
108{
109 if (list == NULL((void*)0))
110 return (-1);
111
112 /* is chunk restricted? */
113 if ((chunk == SCTP_INITIATION0x01) ||
114 (chunk == SCTP_INITIATION_ACK0x02) ||
115 (chunk == SCTP_SHUTDOWN_COMPLETE0x0e) ||
116 (chunk == SCTP_AUTHENTICATION0x0f)) {
117 return (-1);
118 }
119 if (list->chunks[chunk] == 0) {
120 list->chunks[chunk] = 1;
121 list->num_chunks++;
122 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: added chunk %u (0x%02x) to Auth list\n", chunk, chunk
); }; } } while (0); }
123 "SCTP: added chunk %u (0x%02x) to Auth list\n",{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: added chunk %u (0x%02x) to Auth list\n", chunk, chunk
); }; } } while (0); }
124 chunk, chunk){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: added chunk %u (0x%02x) to Auth list\n", chunk, chunk
); }; } } while (0); };
125 }
126 return (0);
127}
128
129/*
130 * delete a chunk from the required chunks list
131 */
132int
133sctp_auth_delete_chunk(uint8_t chunk, sctp_auth_chklist_t *list)
134{
135 if (list == NULL((void*)0))
136 return (-1);
137
138 /* is chunk restricted? */
139 if ((chunk == SCTP_ASCONF0xc1) ||
140 (chunk == SCTP_ASCONF_ACK0x80)) {
141 return (-1);
142 }
143 if (list->chunks[chunk] == 1) {
144 list->chunks[chunk] = 0;
145 list->num_chunks--;
146 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: deleted chunk %u (0x%02x) from Auth list\n", chunk, chunk
); }; } } while (0); }
147 "SCTP: deleted chunk %u (0x%02x) from Auth list\n",{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: deleted chunk %u (0x%02x) from Auth list\n", chunk, chunk
); }; } } while (0); }
148 chunk, chunk){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: deleted chunk %u (0x%02x) from Auth list\n", chunk, chunk
); }; } } while (0); };
149 }
150 return (0);
151}
152
153size_t
154sctp_auth_get_chklist_size(const sctp_auth_chklist_t *list)
155{
156 if (list == NULL((void*)0))
157 return (0);
158 else
159 return (list->num_chunks);
160}
161
162/*
163 * set the default list of chunks requiring AUTH
164 */
165void
166sctp_auth_set_default_chunks(sctp_auth_chklist_t *list)
167{
168 (void)sctp_auth_add_chunk(SCTP_ASCONF0xc1, list);
169 (void)sctp_auth_add_chunk(SCTP_ASCONF_ACK0x80, list);
170}
171
172/*
173 * return the current number and list of required chunks caller must
174 * guarantee ptr has space for up to 256 bytes
175 */
176int
177sctp_serialize_auth_chunks(const sctp_auth_chklist_t *list, uint8_t *ptr)
178{
179 int i, count = 0;
180
181 if (list == NULL((void*)0))
182 return (0);
183
184 for (i = 0; i < 256; i++) {
185 if (list->chunks[i] != 0) {
186 *ptr++ = i;
187 count++;
188 }
189 }
190 return (count);
191}
192
193int
194sctp_pack_auth_chunks(const sctp_auth_chklist_t *list, uint8_t *ptr)
195{
196 int i, size = 0;
197
198 if (list == NULL((void*)0))
199 return (0);
200
201 if (list->num_chunks <= 32) {
202 /* just list them, one byte each */
203 for (i = 0; i < 256; i++) {
204 if (list->chunks[i] != 0) {
205 *ptr++ = i;
206 size++;
207 }
208 }
209 } else {
210 int index, offset;
211
212 /* pack into a 32 byte bitfield */
213 for (i = 0; i < 256; i++) {
214 if (list->chunks[i] != 0) {
215 index = i / 8;
216 offset = i % 8;
217 ptr[index] |= (1 << offset);
218 }
219 }
220 size = 32;
221 }
222 return (size);
223}
224
225int
226sctp_unpack_auth_chunks(const uint8_t *ptr, uint8_t num_chunks,
227 sctp_auth_chklist_t *list)
228{
229 int i;
230 int size;
231
232 if (list == NULL((void*)0))
233 return (0);
234
235 if (num_chunks <= 32) {
236 /* just pull them, one byte each */
237 for (i = 0; i < num_chunks; i++) {
238 (void)sctp_auth_add_chunk(*ptr++, list);
239 }
240 size = num_chunks;
241 } else {
242 int index, offset;
243
244 /* unpack from a 32 byte bitfield */
245 for (index = 0; index < 32; index++) {
246 for (offset = 0; offset < 8; offset++) {
247 if (ptr[index] & (1 << offset)) {
248 (void)sctp_auth_add_chunk((index * 8) + offset, list);
249 }
250 }
251 }
252 size = 32;
253 }
254 return (size);
255}
256
257
258/*
259 * allocate structure space for a key of length keylen
260 */
261sctp_key_t *
262sctp_alloc_key(uint32_t keylen)
263{
264 sctp_key_t *new_key;
265
266 SCTP_MALLOC(new_key, sctp_key_t *, sizeof(*new_key) + keylen,do { ((new_key) = (sctp_key_t *)malloc((u_long)(sizeof(*new_key
) + keylen))); do { if(0x0001 & 0x0100) { memset(new_key,
0,sizeof(*new_key) + keylen); } } while (0);; } while (0)
267 SCTP_M_AUTH_KY)do { ((new_key) = (sctp_key_t *)malloc((u_long)(sizeof(*new_key
) + keylen))); do { if(0x0001 & 0x0100) { memset(new_key,
0,sizeof(*new_key) + keylen); } } while (0);; } while (0);
268 if (new_key == NULL((void*)0)) {
269 /* out of memory */
270 return (NULL((void*)0));
271 }
272 new_key->keylen = keylen;
273 return (new_key);
274}
275
276void
277sctp_free_key(sctp_key_t *key)
278{
279 if (key != NULL((void*)0))
280 SCTP_FREE(key,SCTP_M_AUTH_KY)free((key));
281}
282
283void
284sctp_print_key(sctp_key_t *key, const char *str)
285{
286 uint32_t i;
287
288 if (key == NULL((void*)0)) {
289 SCTP_PRINTF("%s: [Null key]\n", str)if (system_base_info.debug_printf) { system_base_info.debug_printf
("%s: [Null key]\n", str); };
290 return;
291 }
292 SCTP_PRINTF("%s: len %u, ", str, key->keylen)if (system_base_info.debug_printf) { system_base_info.debug_printf
("%s: len %u, ", str, key->keylen); };
293 if (key->keylen) {
294 for (i = 0; i < key->keylen; i++)
295 SCTP_PRINTF("%02x", key->key[i])if (system_base_info.debug_printf) { system_base_info.debug_printf
("%02x", key->key[i]); };
296 SCTP_PRINTF("\n")if (system_base_info.debug_printf) { system_base_info.debug_printf
("\n"); };
297 } else {
298 SCTP_PRINTF("[Null key]\n")if (system_base_info.debug_printf) { system_base_info.debug_printf
("[Null key]\n"); };
299 }
300}
301
302void
303sctp_show_key(sctp_key_t *key, const char *str)
304{
305 uint32_t i;
306
307 if (key == NULL((void*)0)) {
308 SCTP_PRINTF("%s: [Null key]\n", str)if (system_base_info.debug_printf) { system_base_info.debug_printf
("%s: [Null key]\n", str); };
309 return;
310 }
311 SCTP_PRINTF("%s: len %u, ", str, key->keylen)if (system_base_info.debug_printf) { system_base_info.debug_printf
("%s: len %u, ", str, key->keylen); };
312 if (key->keylen) {
313 for (i = 0; i < key->keylen; i++)
314 SCTP_PRINTF("%02x", key->key[i])if (system_base_info.debug_printf) { system_base_info.debug_printf
("%02x", key->key[i]); };
315 SCTP_PRINTF("\n")if (system_base_info.debug_printf) { system_base_info.debug_printf
("\n"); };
316 } else {
317 SCTP_PRINTF("[Null key]\n")if (system_base_info.debug_printf) { system_base_info.debug_printf
("[Null key]\n"); };
318 }
319}
320
321static uint32_t
322sctp_get_keylen(sctp_key_t *key)
323{
324 if (key != NULL((void*)0))
325 return (key->keylen);
326 else
327 return (0);
328}
329
330/*
331 * generate a new random key of length 'keylen'
332 */
333sctp_key_t *
334sctp_generate_random_key(uint32_t keylen)
335{
336 sctp_key_t *new_key;
337
338 /* validate keylen */
339 if (keylen > SCTP_AUTH_RANDOM_SIZE_MAX256)
340 keylen = SCTP_AUTH_RANDOM_SIZE_MAX256;
341
342 new_key = sctp_alloc_key(keylen);
343 if (new_key == NULL((void*)0)) {
344 /* out of memory */
345 return (NULL((void*)0));
346 }
347 SCTP_READ_RANDOM(new_key->key, keylen)read_random(new_key->key, keylen);
348 new_key->keylen = keylen;
349 return (new_key);
350}
351
352sctp_key_t *
353sctp_set_key(uint8_t *key, uint32_t keylen)
354{
355 sctp_key_t *new_key;
356
357 new_key = sctp_alloc_key(keylen);
358 if (new_key == NULL((void*)0)) {
359 /* out of memory */
360 return (NULL((void*)0));
361 }
362 bcopy(key, new_key->key, keylen);
363 return (new_key);
364}
365
366/*-
367 * given two keys of variable size, compute which key is "larger/smaller"
368 * returns: 1 if key1 > key2
369 * -1 if key1 < key2
370 * 0 if key1 = key2
371 */
372static int
373sctp_compare_key(sctp_key_t *key1, sctp_key_t *key2)
374{
375 uint32_t maxlen;
376 uint32_t i;
377 uint32_t key1len, key2len;
378 uint8_t *key_1, *key_2;
379 uint8_t temp[SCTP_AUTH_RANDOM_SIZE_MAX256];
380
381 /* sanity/length check */
382 key1len = sctp_get_keylen(key1);
383 key2len = sctp_get_keylen(key2);
384 if ((key1len == 0) && (key2len == 0))
385 return (0);
386 else if (key1len == 0)
387 return (-1);
388 else if (key2len == 0)
389 return (1);
390
391 if (key1len != key2len) {
392 if (key1len >= key2len)
393 maxlen = key1len;
394 else
395 maxlen = key2len;
396 bzero(temp, maxlen);
397 if (key1len < maxlen) {
398 /* prepend zeroes to key1 */
399 bcopy(key1->key, temp + (maxlen - key1len), key1len);
400 key_1 = temp;
401 key_2 = key2->key;
402 } else {
403 /* prepend zeroes to key2 */
404 bcopy(key2->key, temp + (maxlen - key2len), key2len);
405 key_1 = key1->key;
406 key_2 = temp;
407 }
408 } else {
409 maxlen = key1len;
410 key_1 = key1->key;
411 key_2 = key2->key;
412 }
413
414 for (i = 0; i < maxlen; i++) {
415 if (*key_1 > *key_2)
416 return (1);
417 else if (*key_1 < *key_2)
418 return (-1);
419 key_1++;
420 key_2++;
421 }
422
423 /* keys are equal value, so check lengths */
424 if (key1len == key2len)
425 return (0);
426 else if (key1len < key2len)
427 return (-1);
428 else
429 return (1);
430}
431
432/*
433 * generate the concatenated keying material based on the two keys and the
434 * shared key (if available). draft-ietf-tsvwg-auth specifies the specific
435 * order for concatenation
436 */
437sctp_key_t *
438sctp_compute_hashkey(sctp_key_t *key1, sctp_key_t *key2, sctp_key_t *shared)
439{
440 uint32_t keylen;
441 sctp_key_t *new_key;
442 uint8_t *key_ptr;
443
444 keylen = sctp_get_keylen(key1) + sctp_get_keylen(key2) +
445 sctp_get_keylen(shared);
446
447 if (keylen > 0) {
448 /* get space for the new key */
449 new_key = sctp_alloc_key(keylen);
450 if (new_key == NULL((void*)0)) {
451 /* out of memory */
452 return (NULL((void*)0));
453 }
454 new_key->keylen = keylen;
455 key_ptr = new_key->key;
456 } else {
457 /* all keys empty/null?! */
458 return (NULL((void*)0));
459 }
460
461 /* concatenate the keys */
462 if (sctp_compare_key(key1, key2) <= 0) {
463 /* key is shared + key1 + key2 */
464 if (sctp_get_keylen(shared)) {
465 bcopy(shared->key, key_ptr, shared->keylen);
466 key_ptr += shared->keylen;
467 }
468 if (sctp_get_keylen(key1)) {
469 bcopy(key1->key, key_ptr, key1->keylen);
470 key_ptr += key1->keylen;
471 }
472 if (sctp_get_keylen(key2)) {
473 bcopy(key2->key, key_ptr, key2->keylen);
474 }
475 } else {
476 /* key is shared + key2 + key1 */
477 if (sctp_get_keylen(shared)) {
478 bcopy(shared->key, key_ptr, shared->keylen);
479 key_ptr += shared->keylen;
480 }
481 if (sctp_get_keylen(key2)) {
482 bcopy(key2->key, key_ptr, key2->keylen);
483 key_ptr += key2->keylen;
484 }
485 if (sctp_get_keylen(key1)) {
486 bcopy(key1->key, key_ptr, key1->keylen);
487 }
488 }
489 return (new_key);
490}
491
492
493sctp_sharedkey_t *
494sctp_alloc_sharedkey(void)
495{
496 sctp_sharedkey_t *new_key;
497
498 SCTP_MALLOC(new_key, sctp_sharedkey_t *, sizeof(*new_key),do { ((new_key) = (sctp_sharedkey_t *)malloc((u_long)(sizeof(
*new_key)))); do { if(0x0001 & 0x0100) { memset(new_key,0
,sizeof(*new_key)); } } while (0);; } while (0)
499 SCTP_M_AUTH_KY)do { ((new_key) = (sctp_sharedkey_t *)malloc((u_long)(sizeof(
*new_key)))); do { if(0x0001 & 0x0100) { memset(new_key,0
,sizeof(*new_key)); } } while (0);; } while (0);
500 if (new_key == NULL((void*)0)) {
501 /* out of memory */
502 return (NULL((void*)0));
503 }
504 new_key->keyid = 0;
505 new_key->key = NULL((void*)0);
506 new_key->refcount = 1;
507 new_key->deactivated = 0;
508 return (new_key);
509}
510
511void
512sctp_free_sharedkey(sctp_sharedkey_t *skey)
513{
514 if (skey == NULL((void*)0))
4
←
Taking false branch
→
515 return;
516
517 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&skey->refcount)(__sync_fetch_and_add(&skey->refcount, -1) == 1)) {
5
←
Taking true branch
→
518 if (skey->key != NULL((void*)0))
6
←
Taking false branch
→
519 sctp_free_key(skey->key);
520 SCTP_FREE(skey, SCTP_M_AUTH_KY)free((skey));
7
←
Within the expansion of the macro 'SCTP_FREE':
→
a
Memory is released
521 }
522}
523
524sctp_sharedkey_t *
525sctp_find_sharedkey(struct sctp_keyhead *shared_keys, uint16_t key_id)
526{
527 sctp_sharedkey_t *skey;
528
529 LIST_FOREACH(skey, shared_keys, next)for ((skey) = ((shared_keys)->lh_first); (skey); (skey) = (
(skey)->next.le_next)) {
530 if (skey->keyid == key_id)
531 return (skey);
532 }
533 return (NULL((void*)0));
534}
535
536int
537sctp_insert_sharedkey(struct sctp_keyhead *shared_keys,
538 sctp_sharedkey_t *new_skey)
539{
540 sctp_sharedkey_t *skey;
541
542 if ((shared_keys == NULL((void*)0)) || (new_skey == NULL((void*)0)))
543 return (EINVAL22);
544
545 /* insert into an empty list? */
546 if (LIST_EMPTY(shared_keys)((shared_keys)->lh_first == ((void*)0))) {
547 LIST_INSERT_HEAD(shared_keys, new_skey, next)do { if (((new_skey)->next.le_next = (shared_keys)->lh_first
) != ((void*)0)) (shared_keys)->lh_first->next.le_prev =
&(new_skey)->next.le_next; (shared_keys)->lh_first
= (new_skey); (new_skey)->next.le_prev = &(shared_keys
)->lh_first; } while ( 0);
548 return (0);
549 }
550 /* insert into the existing list, ordered by key id */
551 LIST_FOREACH(skey, shared_keys, next)for ((skey) = ((shared_keys)->lh_first); (skey); (skey) = (
(skey)->next.le_next)) {
552 if (new_skey->keyid < skey->keyid) {
553 /* insert it before here */
554 LIST_INSERT_BEFORE(skey, new_skey, next)do { (new_skey)->next.le_prev = (skey)->next.le_prev; (
new_skey)->next.le_next = (skey); *(skey)->next.le_prev
= (new_skey); (skey)->next.le_prev = &(new_skey)->
next.le_next; } while ( 0);
555 return (0);
556 } else if (new_skey->keyid == skey->keyid) {
557 /* replace the existing key */
558 /* verify this key *can* be replaced */
559 if ((skey->deactivated) && (skey->refcount > 1)) {
560 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("can't replace shared key id %u\n", new_skey->keyid); }; }
} while (0); }
561 "can't replace shared key id %u\n",{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("can't replace shared key id %u\n", new_skey->keyid); }; }
} while (0); }
562 new_skey->keyid){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("can't replace shared key id %u\n", new_skey->keyid); }; }
} while (0); };
563 return (EBUSY16);
564 }
565 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("replacing shared key id %u\n", new_skey->keyid); }; } } while
(0); }
566 "replacing shared key id %u\n",{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("replacing shared key id %u\n", new_skey->keyid); }; } } while
(0); }
567 new_skey->keyid){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("replacing shared key id %u\n", new_skey->keyid); }; } } while
(0); };
568 LIST_INSERT_BEFORE(skey, new_skey, next)do { (new_skey)->next.le_prev = (skey)->next.le_prev; (
new_skey)->next.le_next = (skey); *(skey)->next.le_prev
= (new_skey); (skey)->next.le_prev = &(new_skey)->
next.le_next; } while ( 0);
569 LIST_REMOVE(skey, next)do { if ((skey)->next.le_next != ((void*)0)) (skey)->next
.le_next->next.le_prev = (skey)->next.le_prev; *(skey)->
next.le_prev = (skey)->next.le_next; } while ( 0);
570 sctp_free_sharedkey(skey);
571 return (0);
572 }
573 if (LIST_NEXT(skey, next)((skey)->next.le_next) == NULL((void*)0)) {
574 /* belongs at the end of the list */
575 LIST_INSERT_AFTER(skey, new_skey, next)do { if (((new_skey)->next.le_next = (skey)->next.le_next
) != ((void*)0)) (skey)->next.le_next->next.le_prev = &
(new_skey)->next.le_next; (skey)->next.le_next = (new_skey
); (new_skey)->next.le_prev = &(skey)->next.le_next
; } while ( 0);
576 return (0);
577 }
578 }
579 /* shouldn't reach here */
580 return (0);
581}
582
583void
584sctp_auth_key_acquire(struct sctp_tcb *stcb, uint16_t key_id)
585{
586 sctp_sharedkey_t *skey;
587
588 /* find the shared key */
589 skey = sctp_find_sharedkey(&stcb->asoc.shared_keys, key_id);
590
591 /* bump the ref count */
592 if (skey) {
593 atomic_add_int(&skey->refcount, 1)(void) __sync_fetch_and_add(&skey->refcount, 1);
594 SCTPDBG(SCTP_DEBUG_AUTH2,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000800
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("%s: stcb %p key %u refcount acquire to %d\n", __FUNCTION__,
(void *)stcb, key_id, skey->refcount); }; } } while (0); }
595 "%s: stcb %p key %u refcount acquire to %d\n",{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000800
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("%s: stcb %p key %u refcount acquire to %d\n", __FUNCTION__,
(void *)stcb, key_id, skey->refcount); }; } } while (0); }
596 __FUNCTION__, (void *)stcb, key_id, skey->refcount){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000800
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("%s: stcb %p key %u refcount acquire to %d\n", __FUNCTION__,
(void *)stcb, key_id, skey->refcount); }; } } while (0); };
597 }
598}
599
600void
601sctp_auth_key_release(struct sctp_tcb *stcb, uint16_t key_id, int so_locked
602#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
603 SCTP_UNUSED__attribute__((unused))
604#endif
605)
606{
607 sctp_sharedkey_t *skey;
608
609 /* find the shared key */
610 skey = sctp_find_sharedkey(&stcb->asoc.shared_keys, key_id);
611
612 /* decrement the ref count */
613 if (skey) {
1
Assuming 'skey' is non-null
→
2
←
Taking true branch
→
614 sctp_free_sharedkey(skey);
3
←
Calling 'sctp_free_sharedkey'
→
8
←
Returning; memory was released via 1st parameter
→
615 SCTPDBG(SCTP_DEBUG_AUTH2,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000800
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("%s: stcb %p key %u refcount release to %d\n", __FUNCTION__,
(void *)stcb, key_id, skey->refcount); }; } } while (0); }
616 "%s: stcb %p key %u refcount release to %d\n",{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000800
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("%s: stcb %p key %u refcount release to %d\n", __FUNCTION__,
(void *)stcb, key_id, skey->refcount); }; } } while (0); }
617 __FUNCTION__, (void *)stcb, key_id, skey->refcount){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000800
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("%s: stcb %p key %u refcount release to %d\n", __FUNCTION__,
(void *)stcb, key_id, skey->refcount); }; } } while (0); };
618
619 /* see if a notification should be generated */
620 if ((skey->refcount <= 1) && (skey->deactivated)) {
9
←
Use of memory after it is freed
621 /* notify ULP that key is no longer used */
622 sctp_ulp_notify(SCTP_NOTIFY_AUTH_FREE_KEY24, stcb,
623 key_id, 0, so_locked);
624 SCTPDBG(SCTP_DEBUG_AUTH2,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000800
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("%s: stcb %p key %u no longer used, %d\n", __FUNCTION__, (void
*)stcb, key_id, skey->refcount); }; } } while (0); }
625 "%s: stcb %p key %u no longer used, %d\n",{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000800
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("%s: stcb %p key %u no longer used, %d\n", __FUNCTION__, (void
*)stcb, key_id, skey->refcount); }; } } while (0); }
626 __FUNCTION__, (void *)stcb, key_id, skey->refcount){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000800
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("%s: stcb %p key %u no longer used, %d\n", __FUNCTION__, (void
*)stcb, key_id, skey->refcount); }; } } while (0); };
627 }
628 }
629}
630
631static sctp_sharedkey_t *
632sctp_copy_sharedkey(const sctp_sharedkey_t *skey)
633{
634 sctp_sharedkey_t *new_skey;
635
636 if (skey == NULL((void*)0))
637 return (NULL((void*)0));
638 new_skey = sctp_alloc_sharedkey();
639 if (new_skey == NULL((void*)0))
640 return (NULL((void*)0));
641 if (skey->key != NULL((void*)0))
642 new_skey->key = sctp_set_key(skey->key->key, skey->key->keylen);
643 else
644 new_skey->key = NULL((void*)0);
645 new_skey->keyid = skey->keyid;
646 return (new_skey);
647}
648
649int
650sctp_copy_skeylist(const struct sctp_keyhead *src, struct sctp_keyhead *dest)
651{
652 sctp_sharedkey_t *skey, *new_skey;
653 int count = 0;
654
655 if ((src == NULL((void*)0)) || (dest == NULL((void*)0)))
656 return (0);
657 LIST_FOREACH(skey, src, next)for ((skey) = ((src)->lh_first); (skey); (skey) = ((skey)->
next.le_next)) {
658 new_skey = sctp_copy_sharedkey(skey);
659 if (new_skey != NULL((void*)0)) {
660 (void)sctp_insert_sharedkey(dest, new_skey);
661 count++;
662 }
663 }
664 return (count);
665}
666
667
668sctp_hmaclist_t *
669sctp_alloc_hmaclist(uint8_t num_hmacs)
670{
671 sctp_hmaclist_t *new_list;
672 int alloc_size;
673
674 alloc_size = sizeof(*new_list) + num_hmacs * sizeof(new_list->hmac[0]);
675 SCTP_MALLOC(new_list, sctp_hmaclist_t *, alloc_size,do { ((new_list) = (sctp_hmaclist_t *)malloc((u_long)(alloc_size
))); do { if(0x0001 & 0x0100) { memset(new_list,0,alloc_size
); } } while (0);; } while (0)
676 SCTP_M_AUTH_HL)do { ((new_list) = (sctp_hmaclist_t *)malloc((u_long)(alloc_size
))); do { if(0x0001 & 0x0100) { memset(new_list,0,alloc_size
); } } while (0);; } while (0);
677 if (new_list == NULL((void*)0)) {
678 /* out of memory */
679 return (NULL((void*)0));
680 }
681 new_list->max_algo = num_hmacs;
682 new_list->num_algo = 0;
683 return (new_list);
684}
685
686void
687sctp_free_hmaclist(sctp_hmaclist_t *list)
688{
689 if (list != NULL((void*)0)) {
690 SCTP_FREE(list,SCTP_M_AUTH_HL)free((list));
691 list = NULL((void*)0);
692 }
693}
694
695int
696sctp_auth_add_hmacid(sctp_hmaclist_t *list, uint16_t hmac_id)
697{
698 int i;
699 if (list == NULL((void*)0))
700 return (-1);
701 if (list->num_algo == list->max_algo) {
702 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: HMAC id list full, ignoring add %u\n", hmac_id); }; }
} while (0); }
703 "SCTP: HMAC id list full, ignoring add %u\n", hmac_id){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: HMAC id list full, ignoring add %u\n", hmac_id); }; }
} while (0); };
704 return (-1);
705 }
706 if ((hmac_id != SCTP_AUTH_HMAC_ID_SHA10x0001) &&
707#ifdef HAVE_SHA224
708 (hmac_id != SCTP_AUTH_HMAC_ID_SHA2240x0004) &&
709#endif
710#ifdef HAVE_SHA2
711 (hmac_id != SCTP_AUTH_HMAC_ID_SHA2560x0003) &&
712 (hmac_id != SCTP_AUTH_HMAC_ID_SHA3840x0005) &&
713 (hmac_id != SCTP_AUTH_HMAC_ID_SHA5120x0006) &&
714#endif
715 1) {
716 return (-1);
717 }
718 /* Now is it already in the list */
719 for (i = 0; i < list->num_algo; i++) {
720 if (list->hmac[i] == hmac_id) {
721 /* already in list */
722 return (-1);
723 }
724 }
725 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: add HMAC id %u to list\n", hmac_id){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: add HMAC id %u to list\n", hmac_id); }; } } while (0)
; };
726 list->hmac[list->num_algo++] = hmac_id;
727 return (0);
728}
729
730sctp_hmaclist_t *
731sctp_copy_hmaclist(sctp_hmaclist_t *list)
732{
733 sctp_hmaclist_t *new_list;
734 int i;
735
736 if (list == NULL((void*)0))
737 return (NULL((void*)0));
738 /* get a new list */
739 new_list = sctp_alloc_hmaclist(list->max_algo);
740 if (new_list == NULL((void*)0))
741 return (NULL((void*)0));
742 /* copy it */
743 new_list->max_algo = list->max_algo;
744 new_list->num_algo = list->num_algo;
745 for (i = 0; i < list->num_algo; i++)
746 new_list->hmac[i] = list->hmac[i];
747 return (new_list);
748}
749
750sctp_hmaclist_t *
751sctp_default_supported_hmaclist(void)
752{
753 sctp_hmaclist_t *new_list;
754
755 new_list = sctp_alloc_hmaclist(2);
756 if (new_list == NULL((void*)0))
757 return (NULL((void*)0));
758 (void)sctp_auth_add_hmacid(new_list, SCTP_AUTH_HMAC_ID_SHA10x0001);
759 (void)sctp_auth_add_hmacid(new_list, SCTP_AUTH_HMAC_ID_SHA2560x0003);
760 return (new_list);
761}
762
763/*-
764 * HMAC algos are listed in priority/preference order
765 * find the best HMAC id to use for the peer based on local support
766 */
767uint16_t
768sctp_negotiate_hmacid(sctp_hmaclist_t *peer, sctp_hmaclist_t *local)
769{
770 int i, j;
771
772 if ((local == NULL((void*)0)) || (peer == NULL((void*)0)))
773 return (SCTP_AUTH_HMAC_ID_RSVD0x0000);
774
775 for (i = 0; i < peer->num_algo; i++) {
776 for (j = 0; j < local->num_algo; j++) {
777 if (peer->hmac[i] == local->hmac[j]) {
778 /* found the "best" one */
779 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: negotiated peer HMAC id %u\n", peer->hmac[i]); }; }
} while (0); }
780 "SCTP: negotiated peer HMAC id %u\n",{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: negotiated peer HMAC id %u\n", peer->hmac[i]); }; }
} while (0); }
781 peer->hmac[i]){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: negotiated peer HMAC id %u\n", peer->hmac[i]); }; }
} while (0); };
782 return (peer->hmac[i]);
783 }
784 }
785 }
786 /* didn't find one! */
787 return (SCTP_AUTH_HMAC_ID_RSVD0x0000);
788}
789
790/*-
791 * serialize the HMAC algo list and return space used
792 * caller must guarantee ptr has appropriate space
793 */
794int
795sctp_serialize_hmaclist(sctp_hmaclist_t *list, uint8_t *ptr)
796{
797 int i;
798 uint16_t hmac_id;
799
800 if (list == NULL((void*)0))
801 return (0);
802
803 for (i = 0; i < list->num_algo; i++) {
804 hmac_id = htons(list->hmac[i])(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (list->hmac[i]); if (__builtin_constant_p (__x
)) __v = ((unsigned short int) ((((__x) >> 8) & 0xff
) | (((__x) & 0xff) << 8))); else __asm__ ("rorw $8, %w0"
: "=r" (__v) : "0" (__x) : "cc"); __v; }));
805 bcopy(&hmac_id, ptr, sizeof(hmac_id));
806 ptr += sizeof(hmac_id);
807 }
808 return (list->num_algo * sizeof(hmac_id));
809}
810
811int
812sctp_verify_hmac_param (struct sctp_auth_hmac_algo *hmacs, uint32_t num_hmacs)
813{
814 uint32_t i;
815 uint16_t hmac_id;
816 uint32_t sha1_supported = 0;
817
818 for (i = 0; i < num_hmacs; i++) {
819 hmac_id = ntohs(hmacs->hmac_ids[i])(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (hmacs->hmac_ids[i]); if (__builtin_constant_p
(__x)) __v = ((unsigned short int) ((((__x) >> 8) &
0xff) | (((__x) & 0xff) << 8))); else __asm__ ("rorw $8, %w0"
: "=r" (__v) : "0" (__x) : "cc"); __v; }));
820 if (hmac_id == SCTP_AUTH_HMAC_ID_SHA10x0001)
821 sha1_supported = 1;
822 }
823 /* all HMAC id's are supported */
824 if (sha1_supported == 0)
825 return (-1);
826 else
827 return (0);
828}
829
830sctp_authinfo_t *
831sctp_alloc_authinfo(void)
832{
833 sctp_authinfo_t *new_authinfo;
834
835 SCTP_MALLOC(new_authinfo, sctp_authinfo_t *, sizeof(*new_authinfo),do { ((new_authinfo) = (sctp_authinfo_t *)malloc((u_long)(sizeof
(*new_authinfo)))); do { if(0x0001 & 0x0100) { memset(new_authinfo
,0,sizeof(*new_authinfo)); } } while (0);; } while (0)
836 SCTP_M_AUTH_IF)do { ((new_authinfo) = (sctp_authinfo_t *)malloc((u_long)(sizeof
(*new_authinfo)))); do { if(0x0001 & 0x0100) { memset(new_authinfo
,0,sizeof(*new_authinfo)); } } while (0);; } while (0);
837
838 if (new_authinfo == NULL((void*)0)) {
839 /* out of memory */
840 return (NULL((void*)0));
841 }
842 bzero(new_authinfo, sizeof(*new_authinfo));
843 return (new_authinfo);
844}
845
846void
847sctp_free_authinfo(sctp_authinfo_t *authinfo)
848{
849 if (authinfo == NULL((void*)0))
850 return;
851
852 if (authinfo->random != NULL((void*)0))
853 sctp_free_key(authinfo->random);
854 if (authinfo->peer_random != NULL((void*)0))
855 sctp_free_key(authinfo->peer_random);
856 if (authinfo->assoc_key != NULL((void*)0))
857 sctp_free_key(authinfo->assoc_key);
858 if (authinfo->recv_key != NULL((void*)0))
859 sctp_free_key(authinfo->recv_key);
860
861 /* We are NOT dynamically allocating authinfo's right now... */
862 /* SCTP_FREE(authinfo, SCTP_M_AUTH_??); */
863}
864
865
866uint32_t
867sctp_get_auth_chunk_len(uint16_t hmac_algo)
868{
869 int size;
870
871 size = sizeof(struct sctp_auth_chunk) + sctp_get_hmac_digest_len(hmac_algo);
872 return (SCTP_SIZE32(size)((((size) + 3) >> 2) << 2));
873}
874
875uint32_t
876sctp_get_hmac_digest_len(uint16_t hmac_algo)
877{
878 switch (hmac_algo) {
879 case SCTP_AUTH_HMAC_ID_SHA10x0001:
880 return (SCTP_AUTH_DIGEST_LEN_SHA120);
881#ifdef HAVE_SHA224
882 case SCTP_AUTH_HMAC_ID_SHA2240x0004:
883 return (SCTP_AUTH_DIGEST_LEN_SHA22428);
884#endif
885#ifdef HAVE_SHA2
886 case SCTP_AUTH_HMAC_ID_SHA2560x0003:
887 return (SCTP_AUTH_DIGEST_LEN_SHA25632);
888 case SCTP_AUTH_HMAC_ID_SHA3840x0005:
889 return (SCTP_AUTH_DIGEST_LEN_SHA38448);
890 case SCTP_AUTH_HMAC_ID_SHA5120x0006:
891 return (SCTP_AUTH_DIGEST_LEN_SHA51264);
892#endif
893 default:
894 /* unknown HMAC algorithm: can't do anything */
895 return (0);
896 } /* end switch */
897}
898
899static inline int
900sctp_get_hmac_block_len(uint16_t hmac_algo)
901{
902 switch (hmac_algo) {
903 case SCTP_AUTH_HMAC_ID_SHA10x0001:
904#ifdef HAVE_SHA224
905 case SCTP_AUTH_HMAC_ID_SHA2240x0004:
906#endif
907 return (64);
908#ifdef HAVE_SHA2
909 case SCTP_AUTH_HMAC_ID_SHA2560x0003:
910 return (64);
911 case SCTP_AUTH_HMAC_ID_SHA3840x0005:
912 case SCTP_AUTH_HMAC_ID_SHA5120x0006:
913 return (128);
914#endif
915 case SCTP_AUTH_HMAC_ID_RSVD0x0000:
916 default:
917 /* unknown HMAC algorithm: can't do anything */
918 return (0);
919 } /* end switch */
920}
921
922#if defined(__Userspace__1)
923/* __Userspace__ SHA1_Init is defined in libcrypto.a (libssl-dev on Ubuntu) */
924#endif
925static void
926sctp_hmac_init(uint16_t hmac_algo, sctp_hash_context_t *ctx)
927{
928 switch (hmac_algo) {
929 case SCTP_AUTH_HMAC_ID_SHA10x0001:
930 SHA1_Init(&ctx->sha1);
931 break;
932#ifdef HAVE_SHA224
933 case SCTP_AUTH_HMAC_ID_SHA2240x0004:
934 break;
935#endif
936#ifdef HAVE_SHA2
937 case SCTP_AUTH_HMAC_ID_SHA2560x0003:
938 SHA256_Init(&ctx->sha256);
939 break;
940 case SCTP_AUTH_HMAC_ID_SHA3840x0005:
941 SHA384_Init(&ctx->sha384);
942 break;
943 case SCTP_AUTH_HMAC_ID_SHA5120x0006:
944 SHA512_Init(&ctx->sha512);
945 break;
946#endif
947 case SCTP_AUTH_HMAC_ID_RSVD0x0000:
948 default:
949 /* unknown HMAC algorithm: can't do anything */
950 return;
951 } /* end switch */
952}
953
954static void
955sctp_hmac_update(uint16_t hmac_algo, sctp_hash_context_t *ctx,
956 uint8_t *text, uint32_t textlen)
957{
958 switch (hmac_algo) {
959 case SCTP_AUTH_HMAC_ID_SHA10x0001:
960 SHA1_Update(&ctx->sha1, text, textlen);
961 break;
962#ifdef HAVE_SHA224
963 case SCTP_AUTH_HMAC_ID_SHA2240x0004:
964 break;
965#endif
966#ifdef HAVE_SHA2
967 case SCTP_AUTH_HMAC_ID_SHA2560x0003:
968 SHA256_Update(&ctx->sha256, text, textlen);
969 break;
970 case SCTP_AUTH_HMAC_ID_SHA3840x0005:
971 SHA384_Update(&ctx->sha384, text, textlen);
972 break;
973 case SCTP_AUTH_HMAC_ID_SHA5120x0006:
974 SHA512_Update(&ctx->sha512, text, textlen);
975 break;
976#endif
977 case SCTP_AUTH_HMAC_ID_RSVD0x0000:
978 default:
979 /* unknown HMAC algorithm: can't do anything */
980 return;
981 } /* end switch */
982}
983
984static void
985sctp_hmac_final(uint16_t hmac_algo, sctp_hash_context_t *ctx,
986 uint8_t *digest)
987{
988 switch (hmac_algo) {
989 case SCTP_AUTH_HMAC_ID_SHA10x0001:
990 SHA1_Final(digest, &ctx->sha1);
991 break;
992#ifdef HAVE_SHA224
993 case SCTP_AUTH_HMAC_ID_SHA2240x0004:
994 break;
995#endif
996#ifdef HAVE_SHA2
997 case SCTP_AUTH_HMAC_ID_SHA2560x0003:
998 SHA256_Final(digest, &ctx->sha256);
999 break;
1000 case SCTP_AUTH_HMAC_ID_SHA3840x0005:
1001 /* SHA384 is truncated SHA512 */
1002 SHA384_Final(digest, &ctx->sha384);
1003 break;
1004 case SCTP_AUTH_HMAC_ID_SHA5120x0006:
1005 SHA512_Final(digest, &ctx->sha512);
1006 break;
1007#endif
1008 case SCTP_AUTH_HMAC_ID_RSVD0x0000:
1009 default:
1010 /* unknown HMAC algorithm: can't do anything */
1011 return;
1012 } /* end switch */
1013}
1014
1015/*-
1016 * Keyed-Hashing for Message Authentication: FIPS 198 (RFC 2104)
1017 *
1018 * Compute the HMAC digest using the desired hash key, text, and HMAC
1019 * algorithm. Resulting digest is placed in 'digest' and digest length
1020 * is returned, if the HMAC was performed.
1021 *
1022 * WARNING: it is up to the caller to supply sufficient space to hold the
1023 * resultant digest.
1024 */
1025uint32_t
1026sctp_hmac(uint16_t hmac_algo, uint8_t *key, uint32_t keylen,
1027 uint8_t *text, uint32_t textlen, uint8_t *digest)
1028{
1029 uint32_t digestlen;
1030 uint32_t blocklen;
1031 sctp_hash_context_t ctx;
1032 uint8_t ipad[128], opad[128]; /* keyed hash inner/outer pads */
1033 uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX64];
1034 uint32_t i;
1035
1036 /* sanity check the material and length */
1037 if ((key == NULL((void*)0)) || (keylen == 0) || (text == NULL((void*)0)) ||
1038 (textlen == 0) || (digest == NULL((void*)0))) {
1039 /* can't do HMAC with empty key or text or digest store */
1040 return (0);
1041 }
1042 /* validate the hmac algo and get the digest length */
1043 digestlen = sctp_get_hmac_digest_len(hmac_algo);
1044 if (digestlen == 0)
1045 return (0);
1046
1047 /* hash the key if it is longer than the hash block size */
1048 blocklen = sctp_get_hmac_block_len(hmac_algo);
1049 if (keylen > blocklen) {
1050 sctp_hmac_init(hmac_algo, &ctx);
1051 sctp_hmac_update(hmac_algo, &ctx, key, keylen);
1052 sctp_hmac_final(hmac_algo, &ctx, temp);
1053 /* set the hashed key as the key */
1054 keylen = digestlen;
1055 key = temp;
1056 }
1057 /* initialize the inner/outer pads with the key and "append" zeroes */
1058 bzero(ipad, blocklen);
1059 bzero(opad, blocklen);
1060 bcopy(key, ipad, keylen);
1061 bcopy(key, opad, keylen);
1062
1063 /* XOR the key with ipad and opad values */
1064 for (i = 0; i < blocklen; i++) {
1065 ipad[i] ^= 0x36;
1066 opad[i] ^= 0x5c;
1067 }
1068
1069 /* perform inner hash */
1070 sctp_hmac_init(hmac_algo, &ctx);
1071 sctp_hmac_update(hmac_algo, &ctx, ipad, blocklen);
1072 sctp_hmac_update(hmac_algo, &ctx, text, textlen);
1073 sctp_hmac_final(hmac_algo, &ctx, temp);
1074
1075 /* perform outer hash */
1076 sctp_hmac_init(hmac_algo, &ctx);
1077 sctp_hmac_update(hmac_algo, &ctx, opad, blocklen);
1078 sctp_hmac_update(hmac_algo, &ctx, temp, digestlen);
1079 sctp_hmac_final(hmac_algo, &ctx, digest);
1080
1081 return (digestlen);
1082}
1083
1084/* mbuf version */
1085uint32_t
1086sctp_hmac_m(uint16_t hmac_algo, uint8_t *key, uint32_t keylen,
1087 struct mbuf *m, uint32_t m_offset, uint8_t *digest, uint32_t trailer)
1088{
1089 uint32_t digestlen;
1090 uint32_t blocklen;
1091 sctp_hash_context_t ctx;
1092 uint8_t ipad[128], opad[128]; /* keyed hash inner/outer pads */
1093 uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX64];
1094 uint32_t i;
1095 struct mbuf *m_tmp;
1096
1097 /* sanity check the material and length */
1098 if ((key == NULL((void*)0)) || (keylen == 0) || (m == NULL((void*)0)) || (digest == NULL((void*)0))) {
1099 /* can't do HMAC with empty key or text or digest store */
1100 return (0);
1101 }
1102 /* validate the hmac algo and get the digest length */
1103 digestlen = sctp_get_hmac_digest_len(hmac_algo);
1104 if (digestlen == 0)
1105 return (0);
1106
1107 /* hash the key if it is longer than the hash block size */
1108 blocklen = sctp_get_hmac_block_len(hmac_algo);
1109 if (keylen > blocklen) {
1110 sctp_hmac_init(hmac_algo, &ctx);
1111 sctp_hmac_update(hmac_algo, &ctx, key, keylen);
1112 sctp_hmac_final(hmac_algo, &ctx, temp);
1113 /* set the hashed key as the key */
1114 keylen = digestlen;
1115 key = temp;
1116 }
1117 /* initialize the inner/outer pads with the key and "append" zeroes */
1118 bzero(ipad, blocklen);
1119 bzero(opad, blocklen);
1120 bcopy(key, ipad, keylen);
1121 bcopy(key, opad, keylen);
1122
1123 /* XOR the key with ipad and opad values */
1124 for (i = 0; i < blocklen; i++) {
1125 ipad[i] ^= 0x36;
1126 opad[i] ^= 0x5c;
1127 }
1128
1129 /* perform inner hash */
1130 sctp_hmac_init(hmac_algo, &ctx);
1131 sctp_hmac_update(hmac_algo, &ctx, ipad, blocklen);
1132 /* find the correct starting mbuf and offset (get start of text) */
1133 m_tmp = m;
1134 while ((m_tmp != NULL((void*)0)) && (m_offset >= (uint32_t) SCTP_BUF_LEN(m_tmp)(m_tmp->m_hdr.mh_len))) {
1135 m_offset -= SCTP_BUF_LEN(m_tmp)(m_tmp->m_hdr.mh_len);
1136 m_tmp = SCTP_BUF_NEXT(m_tmp)(m_tmp->m_hdr.mh_next);
1137 }
1138 /* now use the rest of the mbuf chain for the text */
1139 while (m_tmp != NULL((void*)0)) {
1140 if ((SCTP_BUF_NEXT(m_tmp)(m_tmp->m_hdr.mh_next) == NULL((void*)0)) && trailer) {
1141 sctp_hmac_update(hmac_algo, &ctx, mtod(m_tmp, uint8_t *)((uint8_t *)((m_tmp)->m_hdr.mh_data)) + m_offset,
1142 SCTP_BUF_LEN(m_tmp)(m_tmp->m_hdr.mh_len) - (trailer+m_offset));
1143 } else {
1144 sctp_hmac_update(hmac_algo, &ctx, mtod(m_tmp, uint8_t *)((uint8_t *)((m_tmp)->m_hdr.mh_data)) + m_offset,
1145 SCTP_BUF_LEN(m_tmp)(m_tmp->m_hdr.mh_len) - m_offset);
1146 }
1147
1148 /* clear the offset since it's only for the first mbuf */
1149 m_offset = 0;
1150 m_tmp = SCTP_BUF_NEXT(m_tmp)(m_tmp->m_hdr.mh_next);
1151 }
1152 sctp_hmac_final(hmac_algo, &ctx, temp);
1153
1154 /* perform outer hash */
1155 sctp_hmac_init(hmac_algo, &ctx);
1156 sctp_hmac_update(hmac_algo, &ctx, opad, blocklen);
1157 sctp_hmac_update(hmac_algo, &ctx, temp, digestlen);
1158 sctp_hmac_final(hmac_algo, &ctx, digest);
1159
1160 return (digestlen);
1161}
1162
1163/*-
1164 * verify the HMAC digest using the desired hash key, text, and HMAC
1165 * algorithm.
1166 * Returns -1 on error, 0 on success.
1167 */
1168int
1169sctp_verify_hmac(uint16_t hmac_algo, uint8_t *key, uint32_t keylen,
1170 uint8_t *text, uint32_t textlen,
1171 uint8_t *digest, uint32_t digestlen)
1172{
1173 uint32_t len;
1174 uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX64];
1175
1176 /* sanity check the material and length */
1177 if ((key == NULL((void*)0)) || (keylen == 0) ||
1178 (text == NULL((void*)0)) || (textlen == 0) || (digest == NULL((void*)0))) {
1179 /* can't do HMAC with empty key or text or digest */
1180 return (-1);
1181 }
1182 len = sctp_get_hmac_digest_len(hmac_algo);
1183 if ((len == 0) || (digestlen != len))
1184 return (-1);
1185
1186 /* compute the expected hash */
1187 if (sctp_hmac(hmac_algo, key, keylen, text, textlen, temp) != len)
1188 return (-1);
1189
1190 if (memcmp(digest, temp, digestlen) != 0)
1191 return (-1);
1192 else
1193 return (0);
1194}
1195
1196
1197/*
1198 * computes the requested HMAC using a key struct (which may be modified if
1199 * the keylen exceeds the HMAC block len).
1200 */
1201uint32_t
1202sctp_compute_hmac(uint16_t hmac_algo, sctp_key_t *key, uint8_t *text,
1203 uint32_t textlen, uint8_t *digest)
1204{
1205 uint32_t digestlen;
1206 uint32_t blocklen;
1207 sctp_hash_context_t ctx;
1208 uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX64];
1209
1210 /* sanity check */
1211 if ((key == NULL((void*)0)) || (text == NULL((void*)0)) || (textlen == 0) ||
1212 (digest == NULL((void*)0))) {
1213 /* can't do HMAC with empty key or text or digest store */
1214 return (0);
1215 }
1216 /* validate the hmac algo and get the digest length */
1217 digestlen = sctp_get_hmac_digest_len(hmac_algo);
1218 if (digestlen == 0)
1219 return (0);
1220
1221 /* hash the key if it is longer than the hash block size */
1222 blocklen = sctp_get_hmac_block_len(hmac_algo);
1223 if (key->keylen > blocklen) {
1224 sctp_hmac_init(hmac_algo, &ctx);
1225 sctp_hmac_update(hmac_algo, &ctx, key->key, key->keylen);
1226 sctp_hmac_final(hmac_algo, &ctx, temp);
1227 /* save the hashed key as the new key */
1228 key->keylen = digestlen;
1229 bcopy(temp, key->key, key->keylen);
1230 }
1231 return (sctp_hmac(hmac_algo, key->key, key->keylen, text, textlen,
1232 digest));
1233}
1234
1235/* mbuf version */
1236uint32_t
1237sctp_compute_hmac_m(uint16_t hmac_algo, sctp_key_t *key, struct mbuf *m,
1238 uint32_t m_offset, uint8_t *digest)
1239{
1240 uint32_t digestlen;
1241 uint32_t blocklen;
1242 sctp_hash_context_t ctx;
1243 uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX64];
1244
1245 /* sanity check */
1246 if ((key == NULL((void*)0)) || (m == NULL((void*)0)) || (digest == NULL((void*)0))) {
1247 /* can't do HMAC with empty key or text or digest store */
1248 return (0);
1249 }
1250 /* validate the hmac algo and get the digest length */
1251 digestlen = sctp_get_hmac_digest_len(hmac_algo);
1252 if (digestlen == 0)
1253 return (0);
1254
1255 /* hash the key if it is longer than the hash block size */
1256 blocklen = sctp_get_hmac_block_len(hmac_algo);
1257 if (key->keylen > blocklen) {
1258 sctp_hmac_init(hmac_algo, &ctx);
1259 sctp_hmac_update(hmac_algo, &ctx, key->key, key->keylen);
1260 sctp_hmac_final(hmac_algo, &ctx, temp);
1261 /* save the hashed key as the new key */
1262 key->keylen = digestlen;
1263 bcopy(temp, key->key, key->keylen);
1264 }
1265 return (sctp_hmac_m(hmac_algo, key->key, key->keylen, m, m_offset, digest, 0));
1266}
1267
1268int
1269sctp_auth_is_supported_hmac(sctp_hmaclist_t *list, uint16_t id)
1270{
1271 int i;
1272
1273 if ((list == NULL((void*)0)) || (id == SCTP_AUTH_HMAC_ID_RSVD0x0000))
1274 return (0);
1275
1276 for (i = 0; i < list->num_algo; i++)
1277 if (list->hmac[i] == id)
1278 return (1);
1279
1280 /* not in the list */
1281 return (0);
1282}
1283
1284
1285/*-
1286 * clear any cached key(s) if they match the given key id on an association.
1287 * the cached key(s) will be recomputed and re-cached at next use.
1288 * ASSUMES TCB_LOCK is already held
1289 */
1290void
1291sctp_clear_cachedkeys(struct sctp_tcb *stcb, uint16_t keyid)
1292{
1293 if (stcb == NULL((void*)0))
1294 return;
1295
1296 if (keyid == stcb->asoc.authinfo.assoc_keyid) {
1297 sctp_free_key(stcb->asoc.authinfo.assoc_key);
1298 stcb->asoc.authinfo.assoc_key = NULL((void*)0);
1299 }
1300 if (keyid == stcb->asoc.authinfo.recv_keyid) {
1301 sctp_free_key(stcb->asoc.authinfo.recv_key);
1302 stcb->asoc.authinfo.recv_key = NULL((void*)0);
1303 }
1304}
1305
1306/*-
1307 * clear any cached key(s) if they match the given key id for all assocs on
1308 * an endpoint.
1309 * ASSUMES INP_WLOCK is already held
1310 */
1311void
1312sctp_clear_cachedkeys_ep(struct sctp_inpcb *inp, uint16_t keyid)
1313{
1314 struct sctp_tcb *stcb;
1315
1316 if (inp == NULL((void*)0))
1317 return;
1318
1319 /* clear the cached keys on all assocs on this instance */
1320 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist)for ((stcb) = ((&inp->sctp_asoc_list)->lh_first); (
stcb); (stcb) = ((stcb)->sctp_tcblist.le_next)) {
1321 SCTP_TCB_LOCK(stcb)do { (void)pthread_mutex_lock(&(stcb)->tcb_mtx); } while
(0);
1322 sctp_clear_cachedkeys(stcb, keyid);
1323 SCTP_TCB_UNLOCK(stcb)(void)pthread_mutex_unlock(&(stcb)->tcb_mtx);
1324 }
1325}
1326
1327/*-
1328 * delete a shared key from an association
1329 * ASSUMES TCB_LOCK is already held
1330 */
1331int
1332sctp_delete_sharedkey(struct sctp_tcb *stcb, uint16_t keyid)
1333{
1334 sctp_sharedkey_t *skey;
1335
1336 if (stcb == NULL((void*)0))
1337 return (-1);
1338
1339 /* is the keyid the assoc active sending key */
1340 if (keyid == stcb->asoc.authinfo.active_keyid)
1341 return (-1);
1342
1343 /* does the key exist? */
1344 skey = sctp_find_sharedkey(&stcb->asoc.shared_keys, keyid);
1345 if (skey == NULL((void*)0))
1346 return (-1);
1347
1348 /* are there other refcount holders on the key? */
1349 if (skey->refcount > 1)
1350 return (-1);
1351
1352 /* remove it */
1353 LIST_REMOVE(skey, next)do { if ((skey)->next.le_next != ((void*)0)) (skey)->next
.le_next->next.le_prev = (skey)->next.le_prev; *(skey)->
next.le_prev = (skey)->next.le_next; } while ( 0);
1354 sctp_free_sharedkey(skey); /* frees skey->key as well */
1355
1356 /* clear any cached keys */
1357 sctp_clear_cachedkeys(stcb, keyid);
1358 return (0);
1359}
1360
1361/*-
1362 * deletes a shared key from the endpoint
1363 * ASSUMES INP_WLOCK is already held
1364 */
1365int
1366sctp_delete_sharedkey_ep(struct sctp_inpcb *inp, uint16_t keyid)
1367{
1368 sctp_sharedkey_t *skey;
1369
1370 if (inp == NULL((void*)0))
1371 return (-1);
1372
1373 /* is the keyid the active sending key on the endpoint */
1374 if (keyid == inp->sctp_ep.default_keyid)
1375 return (-1);
1376
1377 /* does the key exist? */
1378 skey = sctp_find_sharedkey(&inp->sctp_ep.shared_keys, keyid);
1379 if (skey == NULL((void*)0))
1380 return (-1);
1381
1382 /* endpoint keys are not refcounted */
1383
1384 /* remove it */
1385 LIST_REMOVE(skey, next)do { if ((skey)->next.le_next != ((void*)0)) (skey)->next
.le_next->next.le_prev = (skey)->next.le_prev; *(skey)->
next.le_prev = (skey)->next.le_next; } while ( 0);
1386 sctp_free_sharedkey(skey); /* frees skey->key as well */
1387
1388 /* clear any cached keys */
1389 sctp_clear_cachedkeys_ep(inp, keyid);
1390 return (0);
1391}
1392
1393/*-
1394 * set the active key on an association
1395 * ASSUMES TCB_LOCK is already held
1396 */
1397int
1398sctp_auth_setactivekey(struct sctp_tcb *stcb, uint16_t keyid)
1399{
1400 sctp_sharedkey_t *skey = NULL((void*)0);
1401
1402 /* find the key on the assoc */
1403 skey = sctp_find_sharedkey(&stcb->asoc.shared_keys, keyid);
1404 if (skey == NULL((void*)0)) {
1405 /* that key doesn't exist */
1406 return (-1);
1407 }
1408 if ((skey->deactivated) && (skey->refcount > 1)) {
1409 /* can't reactivate a deactivated key with other refcounts */
1410 return (-1);
1411 }
1412
1413 /* set the (new) active key */
1414 stcb->asoc.authinfo.active_keyid = keyid;
1415 /* reset the deactivated flag */
1416 skey->deactivated = 0;
1417
1418 return (0);
1419}
1420
1421/*-
1422 * set the active key on an endpoint
1423 * ASSUMES INP_WLOCK is already held
1424 */
1425int
1426sctp_auth_setactivekey_ep(struct sctp_inpcb *inp, uint16_t keyid)
1427{
1428 sctp_sharedkey_t *skey;
1429
1430 /* find the key */
1431 skey = sctp_find_sharedkey(&inp->sctp_ep.shared_keys, keyid);
1432 if (skey == NULL((void*)0)) {
1433 /* that key doesn't exist */
1434 return (-1);
1435 }
1436 inp->sctp_ep.default_keyid = keyid;
1437 return (0);
1438}
1439
1440/*-
1441 * deactivates a shared key from the association
1442 * ASSUMES INP_WLOCK is already held
1443 */
1444int
1445sctp_deact_sharedkey(struct sctp_tcb *stcb, uint16_t keyid)
1446{
1447 sctp_sharedkey_t *skey;
1448
1449 if (stcb == NULL((void*)0))
1450 return (-1);
1451
1452 /* is the keyid the assoc active sending key */
1453 if (keyid == stcb->asoc.authinfo.active_keyid)
1454 return (-1);
1455
1456 /* does the key exist? */
1457 skey = sctp_find_sharedkey(&stcb->asoc.shared_keys, keyid);
1458 if (skey == NULL((void*)0))
1459 return (-1);
1460
1461 /* are there other refcount holders on the key? */
1462 if (skey->refcount == 1) {
1463 /* no other users, send a notification for this key */
1464 sctp_ulp_notify(SCTP_NOTIFY_AUTH_FREE_KEY24, stcb, keyid, 0,
1465 SCTP_SO_LOCKED1);
1466 }
1467
1468 /* mark the key as deactivated */
1469 skey->deactivated = 1;
1470
1471 return (0);
1472}
1473
1474/*-
1475 * deactivates a shared key from the endpoint
1476 * ASSUMES INP_WLOCK is already held
1477 */
1478int
1479sctp_deact_sharedkey_ep(struct sctp_inpcb *inp, uint16_t keyid)
1480{
1481 sctp_sharedkey_t *skey;
1482
1483 if (inp == NULL((void*)0))
1484 return (-1);
1485
1486 /* is the keyid the active sending key on the endpoint */
1487 if (keyid == inp->sctp_ep.default_keyid)
1488 return (-1);
1489
1490 /* does the key exist? */
1491 skey = sctp_find_sharedkey(&inp->sctp_ep.shared_keys, keyid);
1492 if (skey == NULL((void*)0))
1493 return (-1);
1494
1495 /* endpoint keys are not refcounted */
1496
1497 /* remove it */
1498 LIST_REMOVE(skey, next)do { if ((skey)->next.le_next != ((void*)0)) (skey)->next
.le_next->next.le_prev = (skey)->next.le_prev; *(skey)->
next.le_prev = (skey)->next.le_next; } while ( 0);
1499 sctp_free_sharedkey(skey); /* frees skey->key as well */
1500
1501 return (0);
1502}
1503
1504/*
1505 * get local authentication parameters from cookie (from INIT-ACK)
1506 */
1507void
1508sctp_auth_get_cookie_params(struct sctp_tcb *stcb, struct mbuf *m,
1509 uint32_t offset, uint32_t length)
1510{
1511 struct sctp_paramhdr *phdr, tmp_param;
1512 uint16_t plen, ptype;
1513 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE512];
1514 struct sctp_auth_random *p_random = NULL((void*)0);
1515 uint16_t random_len = 0;
1516 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE512];
1517 struct sctp_auth_hmac_algo *hmacs = NULL((void*)0);
1518 uint16_t hmacs_len = 0;
1519 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE512];
1520 struct sctp_auth_chunk_list *chunks = NULL((void*)0);
1521 uint16_t num_chunks = 0;
1522 sctp_key_t *new_key;
1523 uint32_t keylen;
1524
1525 /* convert to upper bound */
1526 length += offset;
1527
1528 phdr = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
1529 sizeof(struct sctp_paramhdr), (uint8_t *)&tmp_param);
1530 while (phdr != NULL((void*)0)) {
1531 ptype = ntohs(phdr->param_type)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (phdr->param_type); if (__builtin_constant_p (
__x)) __v = ((unsigned short int) ((((__x) >> 8) & 0xff
) | (((__x) & 0xff) << 8))); else __asm__ ("rorw $8, %w0"
: "=r" (__v) : "0" (__x) : "cc"); __v; }));
1532 plen = ntohs(phdr->param_length)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (phdr->param_length); if (__builtin_constant_p
(__x)) __v = ((unsigned short int) ((((__x) >> 8) &
0xff) | (((__x) & 0xff) << 8))); else __asm__ ("rorw $8, %w0"
: "=r" (__v) : "0" (__x) : "cc"); __v; }));
1533
1534 if ((plen == 0) || (offset + plen > length))
1535 break;
1536
1537 if (ptype == SCTP_RANDOM0x8002) {
1538 if (plen > sizeof(random_store))
1539 break;
1540 phdr = sctp_get_next_param(m, offset,
1541 (struct sctp_paramhdr *)random_store, min(plen, sizeof(random_store))((plen)>(sizeof(random_store))?(sizeof(random_store)):(plen
)));
1542 if (phdr == NULL((void*)0))
1543 return;
1544 /* save the random and length for the key */
1545 p_random = (struct sctp_auth_random *)phdr;
1546 random_len = plen - sizeof(*p_random);
1547 } else if (ptype == SCTP_HMAC_LIST0x8004) {
1548 int num_hmacs;
1549 int i;
1550
1551 if (plen > sizeof(hmacs_store))
1552 break;
1553 phdr = sctp_get_next_param(m, offset,
1554 (struct sctp_paramhdr *)hmacs_store, min(plen,sizeof(hmacs_store))((plen)>(sizeof(hmacs_store))?(sizeof(hmacs_store)):(plen)
));
1555 if (phdr == NULL((void*)0))
1556 return;
1557 /* save the hmacs list and num for the key */
1558 hmacs = (struct sctp_auth_hmac_algo *)phdr;
1559 hmacs_len = plen - sizeof(*hmacs);
1560 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
1561 if (stcb->asoc.local_hmacs != NULL((void*)0))
1562 sctp_free_hmaclist(stcb->asoc.local_hmacs);
1563 stcb->asoc.local_hmacs = sctp_alloc_hmaclist(num_hmacs);
1564 if (stcb->asoc.local_hmacs != NULL((void*)0)) {
1565 for (i = 0; i < num_hmacs; i++) {
1566 (void)sctp_auth_add_hmacid(stcb->asoc.local_hmacs,
1567 ntohs(hmacs->hmac_ids[i])(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (hmacs->hmac_ids[i]); if (__builtin_constant_p
(__x)) __v = ((unsigned short int) ((((__x) >> 8) &
0xff) | (((__x) & 0xff) << 8))); else __asm__ ("rorw $8, %w0"
: "=r" (__v) : "0" (__x) : "cc"); __v; })));
1568 }
1569 }
1570 } else if (ptype == SCTP_CHUNK_LIST0x8003) {
1571 int i;
1572
1573 if (plen > sizeof(chunks_store))
1574 break;
1575 phdr = sctp_get_next_param(m, offset,
1576 (struct sctp_paramhdr *)chunks_store, min(plen,sizeof(chunks_store))((plen)>(sizeof(chunks_store))?(sizeof(chunks_store)):(plen
)));
1577 if (phdr == NULL((void*)0))
1578 return;
1579 chunks = (struct sctp_auth_chunk_list *)phdr;
1580 num_chunks = plen - sizeof(*chunks);
1581 /* save chunks list and num for the key */
1582 if (stcb->asoc.local_auth_chunks != NULL((void*)0))
1583 sctp_clear_chunklist(stcb->asoc.local_auth_chunks);
1584 else
1585 stcb->asoc.local_auth_chunks = sctp_alloc_chunklist();
1586 for (i = 0; i < num_chunks; i++) {
1587 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
1588 stcb->asoc.local_auth_chunks);
1589 }
1590 }
1591 /* get next parameter */
1592 offset += SCTP_SIZE32(plen)((((plen) + 3) >> 2) << 2);
1593 if (offset + sizeof(struct sctp_paramhdr) > length)
1594 break;
1595 phdr = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
1596 (uint8_t *)&tmp_param);
1597 }
1598 /* concatenate the full random key */
1599 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
1600 if (chunks != NULL((void*)0)) {
1601 keylen += sizeof(*chunks) + num_chunks;
1602 }
1603 new_key = sctp_alloc_key(keylen);
1604 if (new_key != NULL((void*)0)) {
1605 /* copy in the RANDOM */
1606 if (p_random != NULL((void*)0)) {
1607 keylen = sizeof(*p_random) + random_len;
1608 bcopy(p_random, new_key->key, keylen);
1609 }
1610 /* append in the AUTH chunks */
1611 if (chunks != NULL((void*)0)) {
1612 bcopy(chunks, new_key->key + keylen,
1613 sizeof(*chunks) + num_chunks);
1614 keylen += sizeof(*chunks) + num_chunks;
1615 }
1616 /* append in the HMACs */
1617 if (hmacs != NULL((void*)0)) {
1618 bcopy(hmacs, new_key->key + keylen,
1619 sizeof(*hmacs) + hmacs_len);
1620 }
1621 }
1622 if (stcb->asoc.authinfo.random != NULL((void*)0))
1623 sctp_free_key(stcb->asoc.authinfo.random);
1624 stcb->asoc.authinfo.random = new_key;
1625 stcb->asoc.authinfo.random_len = random_len;
1626 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
1627 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
1628
1629 /* negotiate what HMAC to use for the peer */
1630 stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
1631 stcb->asoc.local_hmacs);
1632
1633 /* copy defaults from the endpoint */
1634 /* FIX ME: put in cookie? */
1635 stcb->asoc.authinfo.active_keyid = stcb->sctp_ep->sctp_ep.default_keyid;
1636 /* copy out the shared key list (by reference) from the endpoint */
1637 (void)sctp_copy_skeylist(&stcb->sctp_ep->sctp_ep.shared_keys,
1638 &stcb->asoc.shared_keys);
1639}
1640
1641/*
1642 * compute and fill in the HMAC digest for a packet
1643 */
1644void
1645sctp_fill_hmac_digest_m(struct mbuf *m, uint32_t auth_offset,
1646 struct sctp_auth_chunk *auth, struct sctp_tcb *stcb, uint16_t keyid)
1647{
1648 uint32_t digestlen;
1649 sctp_sharedkey_t *skey;
1650 sctp_key_t *key;
1651
1652 if ((stcb == NULL((void*)0)) || (auth == NULL((void*)0)))
1653 return;
1654
1655 /* zero the digest + chunk padding */
1656 digestlen = sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
1657 bzero(auth->hmac, SCTP_SIZE32(digestlen)((((digestlen) + 3) >> 2) << 2));
1658
1659 /* is the desired key cached? */
1660 if ((keyid != stcb->asoc.authinfo.assoc_keyid) ||
1661 (stcb->asoc.authinfo.assoc_key == NULL((void*)0))) {
1662 if (stcb->asoc.authinfo.assoc_key != NULL((void*)0)) {
1663 /* free the old cached key */
1664 sctp_free_key(stcb->asoc.authinfo.assoc_key);
1665 }
1666 skey = sctp_find_sharedkey(&stcb->asoc.shared_keys, keyid);
1667 /* the only way skey is NULL is if null key id 0 is used */
1668 if (skey != NULL((void*)0))
1669 key = skey->key;
1670 else
1671 key = NULL((void*)0);
1672 /* compute a new assoc key and cache it */
1673 stcb->asoc.authinfo.assoc_key =
1674 sctp_compute_hashkey(stcb->asoc.authinfo.random,
1675 stcb->asoc.authinfo.peer_random, key);
1676 stcb->asoc.authinfo.assoc_keyid = keyid;
1677 SCTPDBG(SCTP_DEBUG_AUTH1, "caching key id %u\n",{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("caching key id %u\n", stcb->asoc.authinfo.assoc_keyid); }
; } } while (0); }
1678 stcb->asoc.authinfo.assoc_keyid){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("caching key id %u\n", stcb->asoc.authinfo.assoc_keyid); }
; } } while (0); };
1679#ifdef SCTP_DEBUG1
1680 if (SCTP_AUTH_DEBUG(system_base_info.sctpsysctl.sctp_debug_on & 0x00000400))
1681 sctp_print_key(stcb->asoc.authinfo.assoc_key,
1682 "Assoc Key");
1683#endif
1684 }
1685
1686 /* set in the active key id */
1687 auth->shared_key_id = htons(keyid)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (keyid); if (__builtin_constant_p (__x)) __v = ((
unsigned short int) ((((__x) >> 8) & 0xff) | (((__x
) & 0xff) << 8))); else __asm__ ("rorw $8, %w0" : "=r"
(__v) : "0" (__x) : "cc"); __v; }));
1688
1689 /* compute and fill in the digest */
1690 (void)sctp_compute_hmac_m(stcb->asoc.peer_hmac_id, stcb->asoc.authinfo.assoc_key,
1691 m, auth_offset, auth->hmac);
1692}
1693
1694
1695static void
1696sctp_bzero_m(struct mbuf *m, uint32_t m_offset, uint32_t size)
1697{
1698 struct mbuf *m_tmp;
1699 uint8_t *data;
1700
1701 /* sanity check */
1702 if (m == NULL((void*)0))
1703 return;
1704
1705 /* find the correct starting mbuf and offset (get start position) */
1706 m_tmp = m;
1707 while ((m_tmp != NULL((void*)0)) && (m_offset >= (uint32_t) SCTP_BUF_LEN(m_tmp)(m_tmp->m_hdr.mh_len))) {
1708 m_offset -= SCTP_BUF_LEN(m_tmp)(m_tmp->m_hdr.mh_len);
1709 m_tmp = SCTP_BUF_NEXT(m_tmp)(m_tmp->m_hdr.mh_next);
1710 }
1711 /* now use the rest of the mbuf chain */
1712 while ((m_tmp != NULL((void*)0)) && (size > 0)) {
1713 data = mtod(m_tmp, uint8_t *)((uint8_t *)((m_tmp)->m_hdr.mh_data)) + m_offset;
1714 if (size > (uint32_t) SCTP_BUF_LEN(m_tmp)(m_tmp->m_hdr.mh_len)) {
1715 bzero(data, SCTP_BUF_LEN(m_tmp)(m_tmp->m_hdr.mh_len));
1716 size -= SCTP_BUF_LEN(m_tmp)(m_tmp->m_hdr.mh_len);
1717 } else {
1718 bzero(data, size);
1719 size = 0;
1720 }
1721 /* clear the offset since it's only for the first mbuf */
1722 m_offset = 0;
1723 m_tmp = SCTP_BUF_NEXT(m_tmp)(m_tmp->m_hdr.mh_next);
1724 }
1725}
1726
1727/*-
1728 * process the incoming Authentication chunk
1729 * return codes:
1730 * -1 on any authentication error
1731 * 0 on authentication verification
1732 */
1733int
1734sctp_handle_auth(struct sctp_tcb *stcb, struct sctp_auth_chunk *auth,
1735 struct mbuf *m, uint32_t offset)
1736{
1737 uint16_t chunklen;
1738 uint16_t shared_key_id;
1739 uint16_t hmac_id;
1740 sctp_sharedkey_t *skey;
1741 uint32_t digestlen;
1742 uint8_t digest[SCTP_AUTH_DIGEST_LEN_MAX64];
1743 uint8_t computed_digest[SCTP_AUTH_DIGEST_LEN_MAX64];
1744
1745 /* auth is checked for NULL by caller */
1746 chunklen = ntohs(auth->ch.chunk_length)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (auth->ch.chunk_length); if (__builtin_constant_p
(__x)) __v = ((unsigned short int) ((((__x) >> 8) &
0xff) | (((__x) & 0xff) << 8))); else __asm__ ("rorw $8, %w0"
: "=r" (__v) : "0" (__x) : "cc"); __v; }));
1747 if (chunklen < sizeof(*auth)) {
1748 SCTP_STAT_INCR(sctps_recvauthfailed)(void) __sync_fetch_and_add(&system_base_info.sctpstat.sctps_recvauthfailed
, 1);
1749 return (-1);
1750 }
1751 SCTP_STAT_INCR(sctps_recvauth)(void) __sync_fetch_and_add(&system_base_info.sctpstat.sctps_recvauth
, 1);
1752
1753 /* get the auth params */
1754 shared_key_id = ntohs(auth->shared_key_id)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (auth->shared_key_id); if (__builtin_constant_p
(__x)) __v = ((unsigned short int) ((((__x) >> 8) &
0xff) | (((__x) & 0xff) << 8))); else __asm__ ("rorw $8, %w0"
: "=r" (__v) : "0" (__x) : "cc"); __v; }));
1755 hmac_id = ntohs(auth->hmac_id)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (auth->hmac_id); if (__builtin_constant_p (__x
)) __v = ((unsigned short int) ((((__x) >> 8) & 0xff
) | (((__x) & 0xff) << 8))); else __asm__ ("rorw $8, %w0"
: "=r" (__v) : "0" (__x) : "cc"); __v; }));
1756 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP AUTH Chunk: shared key %u, HMAC id %u\n", shared_key_id
, hmac_id); }; } } while (0); }
1757 "SCTP AUTH Chunk: shared key %u, HMAC id %u\n",{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP AUTH Chunk: shared key %u, HMAC id %u\n", shared_key_id
, hmac_id); }; } } while (0); }
1758 shared_key_id, hmac_id){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP AUTH Chunk: shared key %u, HMAC id %u\n", shared_key_id
, hmac_id); }; } } while (0); };
1759
1760 /* is the indicated HMAC supported? */
1761 if (!sctp_auth_is_supported_hmac(stcb->asoc.local_hmacs, hmac_id)) {
1762 struct mbuf *m_err;
1763 struct sctp_auth_invalid_hmac *err;
1764
1765 SCTP_STAT_INCR(sctps_recvivalhmacid)(void) __sync_fetch_and_add(&system_base_info.sctpstat.sctps_recvivalhmacid
, 1);
1766 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP Auth: unsupported HMAC id %u\n", hmac_id); }; } } while
(0); }
1767 "SCTP Auth: unsupported HMAC id %u\n",{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP Auth: unsupported HMAC id %u\n", hmac_id); }; } } while
(0); }
1768 hmac_id){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP Auth: unsupported HMAC id %u\n", hmac_id); }; } } while
(0); };
1769 /*
1770 * report this in an Error Chunk: Unsupported HMAC
1771 * Identifier
1772 */
1773 m_err = sctp_get_mbuf_for_msg(sizeof(*err), 0, M_NOWAIT0x0001,
1774 1, MT_HEADER1);
1775 if (m_err != NULL((void*)0)) {
1776 /* pre-reserve some space */
1777 SCTP_BUF_RESV_UF(m_err, sizeof(struct sctp_chunkhdr))m_err->m_hdr.mh_data += sizeof(struct sctp_chunkhdr);
1778 /* fill in the error */
1779 err = mtod(m_err, struct sctp_auth_invalid_hmac *)((struct sctp_auth_invalid_hmac *)((m_err)->m_hdr.mh_data)
);
1780 bzero(err, sizeof(*err));
1781 err->ph.param_type = htons(SCTP_CAUSE_UNSUPPORTED_HMACID)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (0x0105); if (__builtin_constant_p (__x)) __v = (
(unsigned short int) ((((__x) >> 8) & 0xff) | (((__x
) & 0xff) << 8))); else __asm__ ("rorw $8, %w0" : "=r"
(__v) : "0" (__x) : "cc"); __v; }));
1782 err->ph.param_length = htons(sizeof(*err))(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (sizeof(*err)); if (__builtin_constant_p (__x)) __v
= ((unsigned short int) ((((__x) >> 8) & 0xff) | (
((__x) & 0xff) << 8))); else __asm__ ("rorw $8, %w0"
: "=r" (__v) : "0" (__x) : "cc"); __v; }));
1783 err->hmac_id = ntohs(hmac_id)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (hmac_id); if (__builtin_constant_p (__x)) __v = (
(unsigned short int) ((((__x) >> 8) & 0xff) | (((__x
) & 0xff) << 8))); else __asm__ ("rorw $8, %w0" : "=r"
(__v) : "0" (__x) : "cc"); __v; }));
1784 SCTP_BUF_LEN(m_err)(m_err->m_hdr.mh_len) = sizeof(*err);
1785 /* queue it */
1786 sctp_queue_op_err(stcb, m_err);
1787 }
1788 return (-1);
1789 }
1790 /* get the indicated shared key, if available */
1791 if ((stcb->asoc.authinfo.recv_key == NULL((void*)0)) ||
1792 (stcb->asoc.authinfo.recv_keyid != shared_key_id)) {
1793 /* find the shared key on the assoc first */
1794 skey = sctp_find_sharedkey(&stcb->asoc.shared_keys,
1795 shared_key_id);
1796 /* if the shared key isn't found, discard the chunk */
1797 if (skey == NULL((void*)0)) {
1798 SCTP_STAT_INCR(sctps_recvivalkeyid)(void) __sync_fetch_and_add(&system_base_info.sctpstat.sctps_recvivalkeyid
, 1);
1799 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP Auth: unknown key id %u\n", shared_key_id); }; } } while
(0); }
1800 "SCTP Auth: unknown key id %u\n",{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP Auth: unknown key id %u\n", shared_key_id); }; } } while
(0); }
1801 shared_key_id){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP Auth: unknown key id %u\n", shared_key_id); }; } } while
(0); };
1802 return (-1);
1803 }
1804 /* generate a notification if this is a new key id */
1805 if (stcb->asoc.authinfo.recv_keyid != shared_key_id)
1806 /*
1807 * sctp_ulp_notify(SCTP_NOTIFY_AUTH_NEW_KEY, stcb,
1808 * shared_key_id, (void
1809 * *)stcb->asoc.authinfo.recv_keyid);
1810 */
1811 sctp_notify_authentication(stcb, SCTP_AUTH_NEW_KEY0x0001,
1812 shared_key_id, stcb->asoc.authinfo.recv_keyid,
1813 SCTP_SO_NOT_LOCKED0);
1814 /* compute a new recv assoc key and cache it */
1815 if (stcb->asoc.authinfo.recv_key != NULL((void*)0))
1816 sctp_free_key(stcb->asoc.authinfo.recv_key);
1817 stcb->asoc.authinfo.recv_key =
1818 sctp_compute_hashkey(stcb->asoc.authinfo.random,
1819 stcb->asoc.authinfo.peer_random, skey->key);
1820 stcb->asoc.authinfo.recv_keyid = shared_key_id;
1821#ifdef SCTP_DEBUG1
1822 if (SCTP_AUTH_DEBUG(system_base_info.sctpsysctl.sctp_debug_on & 0x00000400))
1823 sctp_print_key(stcb->asoc.authinfo.recv_key, "Recv Key");
1824#endif
1825 }
1826 /* validate the digest length */
1827 digestlen = sctp_get_hmac_digest_len(hmac_id);
1828 if (chunklen < (sizeof(*auth) + digestlen)) {
1829 /* invalid digest length */
1830 SCTP_STAT_INCR(sctps_recvauthfailed)(void) __sync_fetch_and_add(&system_base_info.sctpstat.sctps_recvauthfailed
, 1);
1831 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP Auth: chunk too short for HMAC\n"); }; } } while (0); }
1832 "SCTP Auth: chunk too short for HMAC\n"){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP Auth: chunk too short for HMAC\n"); }; } } while (0); };
1833 return (-1);
1834 }
1835 /* save a copy of the digest, zero the pseudo header, and validate */
1836 bcopy(auth->hmac, digest, digestlen);
1837 sctp_bzero_m(m, offset + sizeof(*auth), SCTP_SIZE32(digestlen)((((digestlen) + 3) >> 2) << 2));
1838 (void)sctp_compute_hmac_m(hmac_id, stcb->asoc.authinfo.recv_key,
1839 m, offset, computed_digest);
1840
1841 /* compare the computed digest with the one in the AUTH chunk */
1842 if (memcmp(digest, computed_digest, digestlen) != 0) {
1843 SCTP_STAT_INCR(sctps_recvauthfailed)(void) __sync_fetch_and_add(&system_base_info.sctpstat.sctps_recvauthfailed
, 1);
1844 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP Auth: HMAC digest check failed\n"); }; } } while (0); }
1845 "SCTP Auth: HMAC digest check failed\n"){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP Auth: HMAC digest check failed\n"); }; } } while (0); };
1846 return (-1);
1847 }
1848 return (0);
1849}
1850
1851/*
1852 * Generate NOTIFICATION
1853 */
1854void
1855sctp_notify_authentication(struct sctp_tcb *stcb, uint32_t indication,
1856 uint16_t keyid, uint16_t alt_keyid, int so_locked
1857#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
1858 SCTP_UNUSED__attribute__((unused))
1859#endif
1860)
1861{
1862 struct mbuf *m_notify;
1863 struct sctp_authkey_event *auth;
1864 struct sctp_queued_to_read *control;
1865
1866 if ((stcb == NULL((void*)0)) ||
1867 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE0x10000000) ||
1868 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE0x20000000) ||
1869 (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET0x0100)
1870 ) {
1871 /* If the socket is gone we are out of here */
1872 return;
1873 }
1874
1875 if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_AUTHEVNT)(((stcb != ((void*)0)) && ((stcb->asoc.sctp_features
& 0x00040000) == 0)) || ((stcb == ((void*)0)) &&
(stcb->sctp_ep != ((void*)0)) && ((stcb->sctp_ep
->sctp_features & 0x00040000) == 0)) || ((stcb == ((void
*)0)) && (stcb->sctp_ep == ((void*)0)))))
1876 /* event not enabled */
1877 return;
1878
1879 m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_authkey_event),
1880 0, M_NOWAIT0x0001, 1, MT_HEADER1);
1881 if (m_notify == NULL((void*)0))
1882 /* no space left */
1883 return;
1884
1885 SCTP_BUF_LEN(m_notify)(m_notify->m_hdr.mh_len) = 0;
1886 auth = mtod(m_notify, struct sctp_authkey_event *)((struct sctp_authkey_event *)((m_notify)->m_hdr.mh_data));
1887 auth->auth_type = SCTP_AUTHENTICATION_EVENT0x0008;
1888 auth->auth_flags = 0;
1889 auth->auth_length = sizeof(*auth);
1890 auth->auth_keynumber = keyid;
1891 auth->auth_altkeynumber = alt_keyid;
1892 auth->auth_indication = indication;
1893 auth->auth_assoc_id = sctp_get_associd(stcb)((sctp_assoc_t)stcb->asoc.assoc_id);
1894
1895 SCTP_BUF_LEN(m_notify)(m_notify->m_hdr.mh_len) = sizeof(*auth);
1896 SCTP_BUF_NEXT(m_notify)(m_notify->m_hdr.mh_next) = NULL((void*)0);
1897
1898 /* append to socket */
1899 control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
1900 0, 0, stcb->asoc.context, 0, 0, 0, m_notify);
1901 if (control == NULL((void*)0)) {
1902 /* no memory */
1903 sctp_m_freemm_freem(m_notify);
1904 return;
1905 }
1906 control->spec_flags = M_NOTIFICATION0x0100;
1907 control->length = SCTP_BUF_LEN(m_notify)(m_notify->m_hdr.mh_len);
1908 /* not that we need this */
1909 control->tail_mbuf = m_notify;
1910 sctp_add_to_readq(stcb->sctp_ep, stcb, control,
1911 &stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD0, so_locked);
1912}
1913
1914
1915/*-
1916 * validates the AUTHentication related parameters in an INIT/INIT-ACK
1917 * Note: currently only used for INIT as INIT-ACK is handled inline
1918 * with sctp_load_addresses_from_init()
1919 */
1920int
1921sctp_validate_init_auth_params(struct mbuf *m, int offset, int limit)
1922{
1923 struct sctp_paramhdr *phdr, parm_buf;
1924 uint16_t ptype, plen;
1925 int peer_supports_asconf = 0;
1926 int peer_supports_auth = 0;
1927 int got_random = 0, got_hmacs = 0, got_chklist = 0;
1928 uint8_t saw_asconf = 0;
1929 uint8_t saw_asconf_ack = 0;
1930
1931 /* go through each of the params. */
1932 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1933 while (phdr) {
1934 ptype = ntohs(phdr->param_type)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (phdr->param_type); if (__builtin_constant_p (
__x)) __v = ((unsigned short int) ((((__x) >> 8) & 0xff
) | (((__x) & 0xff) << 8))); else __asm__ ("rorw $8, %w0"
: "=r" (__v) : "0" (__x) : "cc"); __v; }));
1935 plen = ntohs(phdr->param_length)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (phdr->param_length); if (__builtin_constant_p
(__x)) __v = ((unsigned short int) ((((__x) >> 8) &
0xff) | (((__x) & 0xff) << 8))); else __asm__ ("rorw $8, %w0"
: "=r" (__v) : "0" (__x) : "cc"); __v; }));
1936
1937 if (offset + plen > limit) {
1938 break;
1939 }
1940 if (plen < sizeof(struct sctp_paramhdr)) {
1941 break;
1942 }
1943 if (ptype == SCTP_SUPPORTED_CHUNK_EXT0x8008) {
1944 /* A supported extension chunk */
1945 struct sctp_supported_chunk_types_param *pr_supported;
1946 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE512];
1947 int num_ent, i;
1948
1949 phdr = sctp_get_next_param(m, offset,
1950 (struct sctp_paramhdr *)&local_store, min(plen,sizeof(local_store))((plen)>(sizeof(local_store))?(sizeof(local_store)):(plen)
));
1951 if (phdr == NULL((void*)0)) {
1952 return (-1);
1953 }
1954 pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
1955 num_ent = plen - sizeof(struct sctp_paramhdr);
1956 for (i = 0; i < num_ent; i++) {
1957 switch (pr_supported->chunk_types[i]) {
1958 case SCTP_ASCONF0xc1:
1959 case SCTP_ASCONF_ACK0x80:
1960 peer_supports_asconf = 1;
1961 break;
1962 default:
1963 /* one we don't care about */
1964 break;
1965 }
1966 }
1967 } else if (ptype == SCTP_RANDOM0x8002) {
1968 got_random = 1;
1969 /* enforce the random length */
1970 if (plen != (sizeof(struct sctp_auth_random) +
1971 SCTP_AUTH_RANDOM_SIZE_REQUIRED32)) {
1972 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: invalid RANDOM len\n"); }; } } while (0); }
1973 "SCTP: invalid RANDOM len\n"){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: invalid RANDOM len\n"); }; } } while (0); };
1974 return (-1);
1975 }
1976 } else if (ptype == SCTP_HMAC_LIST0x8004) {
1977 uint8_t store[SCTP_PARAM_BUFFER_SIZE512];
1978 struct sctp_auth_hmac_algo *hmacs;
1979 int num_hmacs;
1980
1981 if (plen > sizeof(store))
1982 break;
1983 phdr = sctp_get_next_param(m, offset,
1984 (struct sctp_paramhdr *)store, min(plen,sizeof(store))((plen)>(sizeof(store))?(sizeof(store)):(plen)));
1985 if (phdr == NULL((void*)0))
1986 return (-1);
1987 hmacs = (struct sctp_auth_hmac_algo *)phdr;
1988 num_hmacs = (plen - sizeof(*hmacs)) /
1989 sizeof(hmacs->hmac_ids[0]);
1990 /* validate the hmac list */
1991 if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
1992 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: invalid HMAC param\n"); }; } } while (0); }
1993 "SCTP: invalid HMAC param\n"){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: invalid HMAC param\n"); }; } } while (0); };
1994 return (-1);
1995 }
1996 got_hmacs = 1;
1997 } else if (ptype == SCTP_CHUNK_LIST0x8003) {
1998 int i, num_chunks;
1999 uint8_t chunks_store[SCTP_SMALL_CHUNK_STORE260];
2000 /* did the peer send a non-empty chunk list? */
2001 struct sctp_auth_chunk_list *chunks = NULL((void*)0);
2002 phdr = sctp_get_next_param(m, offset,
2003 (struct sctp_paramhdr *)chunks_store,
2004 min(plen,sizeof(chunks_store))((plen)>(sizeof(chunks_store))?(sizeof(chunks_store)):(plen
)));
2005 if (phdr == NULL((void*)0))
2006 return (-1);
2007
2008 /*-
2009 * Flip through the list and mark that the
2010 * peer supports asconf/asconf_ack.
2011 */
2012 chunks = (struct sctp_auth_chunk_list *)phdr;
2013 num_chunks = plen - sizeof(*chunks);
2014 for (i = 0; i < num_chunks; i++) {
2015 /* record asconf/asconf-ack if listed */
2016 if (chunks->chunk_types[i] == SCTP_ASCONF0xc1)
2017 saw_asconf = 1;
2018 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK0x80)
2019 saw_asconf_ack = 1;
2020
2021 }
2022 if (num_chunks)
2023 got_chklist = 1;
2024 }
2025
2026 offset += SCTP_SIZE32(plen)((((plen) + 3) >> 2) << 2);
2027 if (offset >= limit) {
2028 break;
2029 }
2030 phdr = sctp_get_next_param(m, offset, &parm_buf,
2031 sizeof(parm_buf));
2032 }
2033 /* validate authentication required parameters */
2034 if (got_random && got_hmacs) {
2035 peer_supports_auth = 1;
2036 } else {
2037 peer_supports_auth = 0;
2038 }
2039 if (!peer_supports_auth && got_chklist) {
2040 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: peer sent chunk list w/o AUTH\n"); }; } } while (0); }
2041 "SCTP: peer sent chunk list w/o AUTH\n"){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: peer sent chunk list w/o AUTH\n"); }; } } while (0); };
2042 return (-1);
2043 }
2044 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk)system_base_info.sctpsysctl.sctp_asconf_auth_nochk && peer_supports_asconf &&
2045 !peer_supports_auth) {
2046 SCTPDBG(SCTP_DEBUG_AUTH1,{ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: peer supports ASCONF but not AUTH\n"); }; } } while (
0); }
2047 "SCTP: peer supports ASCONF but not AUTH\n"){ do { if (system_base_info.sctpsysctl.sctp_debug_on & 0x00000400
) { if (system_base_info.debug_printf) { system_base_info.debug_printf
("SCTP: peer supports ASCONF but not AUTH\n"); }; } } while (
0); };
2048 return (-1);
2049 } else if ((peer_supports_asconf) && (peer_supports_auth) &&
2050 ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
2051 return (-2);
2052 }
2053 return (0);
2054}
2055
2056void
2057sctp_initialize_auth_params(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
2058{
2059 uint16_t chunks_len = 0;
2060 uint16_t hmacs_len = 0;
2061 uint16_t random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT32;
2062 sctp_key_t *new_key;
2063 uint16_t keylen;
2064
2065 /* initialize hmac list from endpoint */
2066 stcb->asoc.local_hmacs = sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
2067 if (stcb->asoc.local_hmacs != NULL((void*)0)) {
2068 hmacs_len = stcb->asoc.local_hmacs->num_algo *
2069 sizeof(stcb->asoc.local_hmacs->hmac[0]);
2070 }
2071 /* initialize auth chunks list from endpoint */
2072 stcb->asoc.local_auth_chunks =
2073 sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
2074 if (stcb->asoc.local_auth_chunks != NULL((void*)0)) {
2075 int i;
2076 for (i = 0; i < 256; i++) {
2077 if (stcb->asoc.local_auth_chunks->chunks[i])
2078 chunks_len++;
2079 }
2080 }
2081 /* copy defaults from the endpoint */
2082 stcb->asoc.authinfo.active_keyid = inp->sctp_ep.default_keyid;
2083
2084 /* copy out the shared key list (by reference) from the endpoint */
2085 (void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys,
2086 &stcb->asoc.shared_keys);
2087
2088 /* now set the concatenated key (random + chunks + hmacs) */
2089 /* key includes parameter headers */
2090 keylen = (3 * sizeof(struct sctp_paramhdr)) + random_len + chunks_len +
2091 hmacs_len;
2092 new_key = sctp_alloc_key(keylen);
2093 if (new_key != NULL((void*)0)) {
2094 struct sctp_paramhdr *ph;
2095 int plen;
2096 /* generate and copy in the RANDOM */
2097 ph = (struct sctp_paramhdr *)new_key->key;
2098 ph->param_type = htons(SCTP_RANDOM)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (0x8002); if (__builtin_constant_p (__x)) __v = (
(unsigned short int) ((((__x) >> 8) & 0xff) | (((__x
) & 0xff) << 8))); else __asm__ ("rorw $8, %w0" : "=r"
(__v) : "0" (__x) : "cc"); __v; }));
2099 plen = sizeof(*ph) + random_len;
2100 ph->param_length = htons(plen)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (plen); if (__builtin_constant_p (__x)) __v = ((unsigned
short int) ((((__x) >> 8) & 0xff) | (((__x) & 0xff
) << 8))); else __asm__ ("rorw $8, %w0" : "=r" (__v) : "0"
(__x) : "cc"); __v; }));
2101 SCTP_READ_RANDOM(new_key->key + sizeof(*ph), random_len)read_random(new_key->key + sizeof(*ph), random_len);
2102 keylen = plen;
2103
2104 /* append in the AUTH chunks */
2105 /* NOTE: currently we always have chunks to list */
2106 ph = (struct sctp_paramhdr *)(new_key->key + keylen);
2107 ph->param_type = htons(SCTP_CHUNK_LIST)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (0x8003); if (__builtin_constant_p (__x)) __v = (
(unsigned short int) ((((__x) >> 8) & 0xff) | (((__x
) & 0xff) << 8))); else __asm__ ("rorw $8, %w0" : "=r"
(__v) : "0" (__x) : "cc"); __v; }));
2108 plen = sizeof(*ph) + chunks_len;
2109 ph->param_length = htons(plen)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (plen); if (__builtin_constant_p (__x)) __v = ((unsigned
short int) ((((__x) >> 8) & 0xff) | (((__x) & 0xff
) << 8))); else __asm__ ("rorw $8, %w0" : "=r" (__v) : "0"
(__x) : "cc"); __v; }));
2110 keylen += sizeof(*ph);
2111 if (stcb->asoc.local_auth_chunks) {
2112 int i;
2113 for (i = 0; i < 256; i++) {
2114 if (stcb->asoc.local_auth_chunks->chunks[i])
2115 new_key->key[keylen++] = i;
2116 }
2117 }
2118
2119 /* append in the HMACs */
2120 ph = (struct sctp_paramhdr *)(new_key->key + keylen);
2121 ph->param_type = htons(SCTP_HMAC_LIST)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (0x8004); if (__builtin_constant_p (__x)) __v = (
(unsigned short int) ((((__x) >> 8) & 0xff) | (((__x
) & 0xff) << 8))); else __asm__ ("rorw $8, %w0" : "=r"
(__v) : "0" (__x) : "cc"); __v; }));
2122 plen = sizeof(*ph) + hmacs_len;
2123 ph->param_length = htons(plen)(__extension__ ({ register unsigned short int __v, __x = (unsigned
short int) (plen); if (__builtin_constant_p (__x)) __v = ((unsigned
short int) ((((__x) >> 8) & 0xff) | (((__x) & 0xff
) << 8))); else __asm__ ("rorw $8, %w0" : "=r" (__v) : "0"
(__x) : "cc"); __v; }));
2124 keylen += sizeof(*ph);
2125 (void)sctp_serialize_hmaclist(stcb->asoc.local_hmacs,
2126 new_key->key + keylen);
2127 }
2128 if (stcb->asoc.authinfo.random != NULL((void*)0))
2129 sctp_free_key(stcb->asoc.authinfo.random);
2130 stcb->asoc.authinfo.random = new_key;
2131 stcb->asoc.authinfo.random_len = random_len;
2132}
2133
2134
2135#ifdef SCTP_HMAC_TEST
2136/*
2137 * HMAC and key concatenation tests
2138 */
2139static void
2140sctp_print_digest(uint8_t *digest, uint32_t digestlen, const char *str)
2141{
2142 uint32_t i;
2143
2144 SCTP_PRINTF("\n%s: 0x", str)if (system_base_info.debug_printf) { system_base_info.debug_printf
("\n%s: 0x", str); };
2145 if (digest == NULL((void*)0))
2146 return;
2147
2148 for (i = 0; i < digestlen; i++)
2149 SCTP_PRINTF("%02x", digest[i])if (system_base_info.debug_printf) { system_base_info.debug_printf
("%02x", digest[i]); };
2150}
2151
2152static int
2153sctp_test_hmac(const char *str, uint16_t hmac_id, uint8_t *key,
2154 uint32_t keylen, uint8_t *text, uint32_t textlen,
2155 uint8_t *digest, uint32_t digestlen)
2156{
2157 uint8_t computed_digest[SCTP_AUTH_DIGEST_LEN_MAX64];
2158
2159 SCTP_PRINTF("\n%s:", str)if (system_base_info.debug_printf) { system_base_info.debug_printf
("\n%s:", str); };
2160 sctp_hmac(hmac_id, key, keylen, text, textlen, computed_digest);
2161 sctp_print_digest(digest, digestlen, "Expected digest");
2162 sctp_print_digest(computed_digest, digestlen, "Computed digest");
2163 if (memcmp(digest, computed_digest, digestlen) != 0) {
2164 SCTP_PRINTF("\nFAILED")if (system_base_info.debug_printf) { system_base_info.debug_printf
("\nFAILED"); };
2165 return (-1);
2166 } else {
2167 SCTP_PRINTF("\nPASSED")if (system_base_info.debug_printf) { system_base_info.debug_printf
("\nPASSED"); };
2168 return (0);
2169 }
2170}
2171
2172
2173/*
2174 * RFC 2202: HMAC-SHA1 test cases
2175 */
2176void
2177sctp_test_hmac_sha1(void)
2178{
2179 uint8_t *digest;
2180 uint8_t key[128];
2181 uint32_t keylen;
2182 uint8_t text[128];
2183 uint32_t textlen;
2184 uint32_t digestlen = 20;
2185 int failed = 0;
2186
2187 /*-
2188 * test_case = 1
2189 * key = 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b
2190 * key_len = 20
2191 * data = "Hi There"
2192 * data_len = 8
2193 * digest = 0xb617318655057264e28bc0b6fb378c8ef146be00
2194 */
2195 keylen = 20;
2196 memset(key, 0x0b, keylen);
2197 textlen = 8;
2198 strcpy(text, "Hi There");
2199 digest = "\xb6\x17\x31\x86\x55\x05\x72\x64\xe2\x8b\xc0\xb6\xfb\x37\x8c\x8e\xf1\x46\xbe\x00";
2200 if (sctp_test_hmac("SHA1 test case 1", SCTP_AUTH_HMAC_ID_SHA10x0001, key, keylen,
2201 text, textlen, digest, digestlen) < 0)
2202 failed++;
2203
2204 /*-
2205 * test_case = 2
2206 * key = "Jefe"
2207 * key_len = 4
2208 * data = "what do ya want for nothing?"
2209 * data_len = 28
2210 * digest = 0xeffcdf6ae5eb2fa2d27416d5f184df9c259a7c79
2211 */
2212 keylen = 4;
2213 strcpy(key, "Jefe");
2214 textlen = 28;
2215 strcpy(text, "what do ya want for nothing?");
2216 digest = "\xef\xfc\xdf\x6a\xe5\xeb\x2f\xa2\xd2\x74\x16\xd5\xf1\x84\xdf\x9c\x25\x9a\x7c\x79";
2217 if (sctp_test_hmac("SHA1 test case 2", SCTP_AUTH_HMAC_ID_SHA10x0001, key, keylen,
2218 text, textlen, digest, digestlen) < 0)
2219 failed++;
2220
2221 /*-
2222 * test_case = 3
2223 * key = 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
2224 * key_len = 20
2225 * data = 0xdd repeated 50 times
2226 * data_len = 50
2227 * digest = 0x125d7342b9ac11cd91a39af48aa17b4f63f175d3
2228 */
2229 keylen = 20;
2230 memset(key, 0xaa, keylen);
2231 textlen = 50;
2232 memset(text, 0xdd, textlen);
2233 digest = "\x12\x5d\x73\x42\xb9\xac\x11\xcd\x91\xa3\x9a\xf4\x8a\xa1\x7b\x4f\x63\xf1\x75\xd3";
2234 if (sctp_test_hmac("SHA1 test case 3", SCTP_AUTH_HMAC_ID_SHA10x0001, key, keylen,
2235 text, textlen, digest, digestlen) < 0)
2236 failed++;
2237
2238 /*-
2239 * test_case = 4
2240 * key = 0x0102030405060708090a0b0c0d0e0f10111213141516171819
2241 * key_len = 25
2242 * data = 0xcd repeated 50 times
2243 * data_len = 50
2244 * digest = 0x4c9007f4026250c6bc8414f9bf50c86c2d7235da
2245 */
2246 keylen = 25;
2247 memcpy(key, "\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19", keylen);
2248 textlen = 50;
2249 memset(text, 0xcd, textlen);
2250 digest = "\x4c\x90\x07\xf4\x02\x62\x50\xc6\xbc\x84\x14\xf9\xbf\x50\xc8\x6c\x2d\x72\x35\xda";
2251 if (sctp_test_hmac("SHA1 test case 4", SCTP_AUTH_HMAC_ID_SHA10x0001, key, keylen,
2252 text, textlen, digest, digestlen) < 0)
2253 failed++;
2254
2255 /*-
2256 * test_case = 5
2257 * key = 0x0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c
2258 * key_len = 20
2259 * data = "Test With Truncation"
2260 * data_len = 20
2261 * digest = 0x4c1a03424b55e07fe7f27be1d58bb9324a9a5a04
2262 * digest-96 = 0x4c1a03424b55e07fe7f27be1
2263 */
2264 keylen = 20;
2265 memset(key, 0x0c, keylen);
2266 textlen = 20;
2267 strcpy(text, "Test With Truncation");
2268 digest = "\x4c\x1a\x03\x42\x4b\x55\xe0\x7f\xe7\xf2\x7b\xe1\xd5\x8b\xb9\x32\x4a\x9a\x5a\x04";
2269 if (sctp_test_hmac("SHA1 test case 5", SCTP_AUTH_HMAC_ID_SHA10x0001, key, keylen,
2270 text, textlen, digest, digestlen) < 0)
2271 failed++;
2272
2273 /*-
2274 * test_case = 6
2275 * key = 0xaa repeated 80 times
2276 * key_len = 80
2277 * data = "Test Using Larger Than Block-Size Key - Hash Key First"
2278 * data_len = 54
2279 * digest = 0xaa4ae5e15272d00e95705637ce8a3b55ed402112
2280 */
2281 keylen = 80;
2282 memset(key, 0xaa, keylen);
2283 textlen = 54;
2284 strcpy(text, "Test Using Larger Than Block-Size Key - Hash Key First");
2285 digest = "\xaa\x4a\xe5\xe1\x52\x72\xd0\x0e\x95\x70\x56\x37\xce\x8a\x3b\x55\xed\x40\x21\x12";
2286 if (sctp_test_hmac("SHA1 test case 6", SCTP_AUTH_HMAC_ID_SHA10x0001, key, keylen,
2287 text, textlen, digest, digestlen) < 0)
2288 failed++;
2289
2290 /*-
2291 * test_case = 7
2292 * key = 0xaa repeated 80 times
2293 * key_len = 80
2294 * data = "Test Using Larger Than Block-Size Key and Larger Than One Block-Size Data"
2295 * data_len = 73
2296 * digest = 0xe8e99d0f45237d786d6bbaa7965c7808bbff1a91
2297 */
2298 keylen = 80;
2299 memset(key, 0xaa, keylen);
2300 textlen = 73;
2301 strcpy(text, "Test Using Larger Than Block-Size Key and Larger Than One Block-Size Data");
2302 digest = "\xe8\xe9\x9d\x0f\x45\x23\x7d\x78\x6d\x6b\xba\xa7\x96\x5c\x78\x08\xbb\xff\x1a\x91";
2303 if (sctp_test_hmac("SHA1 test case 7", SCTP_AUTH_HMAC_ID_SHA10x0001, key, keylen,
2304 text, textlen, digest, digestlen) < 0)
2305 failed++;
2306
2307 /* done with all tests */
2308 if (failed)
2309 SCTP_PRINTF("\nSHA1 test results: %d cases failed", failed)if (system_base_info.debug_printf) { system_base_info.debug_printf
("\nSHA1 test results: %d cases failed", failed); };
2310 else
2311 SCTP_PRINTF("\nSHA1 test results: all test cases passed")if (system_base_info.debug_printf) { system_base_info.debug_printf
("\nSHA1 test results: all test cases passed"); };
2312}
2313
2314/*
2315 * test assoc key concatenation
2316 */
2317static int
2318sctp_test_key_concatenation(sctp_key_t *key1, sctp_key_t *key2,
2319 sctp_key_t *expected_key)
2320{
2321 sctp_key_t *key;
2322 int ret_val;
2323
2324 sctp_show_key(key1, "\nkey1");
2325 sctp_show_key(key2, "\nkey2");
2326 key = sctp_compute_hashkey(key1, key2, NULL((void*)0));
2327 sctp_show_key(expected_key, "\nExpected");
2328 sctp_show_key(key, "\nComputed");
2329 if (memcmp(key, expected_key, expected_key->keylen) != 0) {
2330 SCTP_PRINTF("\nFAILED")if (system_base_info.debug_printf) { system_base_info.debug_printf
("\nFAILED"); };
2331 ret_val = -1;
2332 } else {
2333 SCTP_PRINTF("\nPASSED")if (system_base_info.debug_printf) { system_base_info.debug_printf
("\nPASSED"); };
2334 ret_val = 0;
2335 }
2336 sctp_free_key(key1);
2337 sctp_free_key(key2);
2338 sctp_free_key(expected_key);
2339 sctp_free_key(key);
2340 return (ret_val);
2341}
2342
2343
2344void
2345sctp_test_authkey(void)
2346{
2347 sctp_key_t *key1, *key2, *expected_key;
2348 int failed = 0;
2349
2350 /* test case 1 */
2351 key1 = sctp_set_key("\x01\x01\x01\x01", 4);
2352 key2 = sctp_set_key("\x01\x02\x03\x04", 4);
2353 expected_key = sctp_set_key("\x01\x01\x01\x01\x01\x02\x03\x04", 8);
2354 if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2355 failed++;
2356
2357 /* test case 2 */
2358 key1 = sctp_set_key("\x00\x00\x00\x01", 4);
2359 key2 = sctp_set_key("\x02", 1);
2360 expected_key = sctp_set_key("\x00\x00\x00\x01\x02", 5);
2361 if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2362 failed++;
2363
2364 /* test case 3 */
2365 key1 = sctp_set_key("\x01", 1);
2366 key2 = sctp_set_key("\x00\x00\x00\x02", 4);
2367 expected_key = sctp_set_key("\x01\x00\x00\x00\x02", 5);
2368 if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2369 failed++;
2370
2371 /* test case 4 */
2372 key1 = sctp_set_key("\x00\x00\x00\x01", 4);
2373 key2 = sctp_set_key("\x01", 1);
2374 expected_key = sctp_set_key("\x01\x00\x00\x00\x01", 5);
2375 if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2376 failed++;
2377
2378 /* test case 5 */
2379 key1 = sctp_set_key("\x01", 1);
2380 key2 = sctp_set_key("\x00\x00\x00\x01", 4);
2381 expected_key = sctp_set_key("\x01\x00\x00\x00\x01", 5);
2382 if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2383 failed++;
2384
2385 /* test case 6 */
2386 key1 = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x07", 11);
2387 key2 = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x08", 11);
2388 expected_key = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x07\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x08", 22);
2389 if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2390 failed++;
2391
2392 /* test case 7 */
2393 key1 = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x08", 11);
2394 key2 = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x07", 11);
2395 expected_key = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x07\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x08", 22);
2396 if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2397 failed++;
2398
2399 /* done with all tests */
2400 if (failed)
2401 SCTP_PRINTF("\nKey concatenation test results: %d cases failed", failed)if (system_base_info.debug_printf) { system_base_info.debug_printf
("\nKey concatenation test results: %d cases failed", failed)
; };
2402 else
2403 SCTP_PRINTF("\nKey concatenation test results: all test cases passed")if (system_base_info.debug_printf) { system_base_info.debug_printf
("\nKey concatenation test results: all test cases passed"); };
2404}
2405
2406
2407#if defined(STANDALONE_HMAC_TEST)
2408int
2409main(void)
2410{
2411 sctp_test_hmac_sha1();
2412 sctp_test_authkey();
2413}
2414
2415#endif /* STANDALONE_HMAC_TEST */
2416
2417#endif /* SCTP_HMAC_TEST */