xref: /freebsd/sys/netinet/sctp_auth.c (revision 588ff6c0cc9aaf10ba19080d9f8acbd8be36abf3)
1 /*-
2  * Copyright (c) 2001-2006, Cisco Systems, Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are met:
6  *
7  * a) Redistributions of source code must retain the above copyright notice,
8  *   this list of conditions and the following disclaimer.
9  *
10  * b) Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in
12  *   the documentation and/or other materials provided with the distribution.
13  *
14  * c) Neither the name of Cisco Systems, Inc. nor the names of its
15  *    contributors may be used to endorse or promote products derived
16  *    from this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28  * THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33 
34 #include <netinet/sctp_os.h>
35 #include <netinet/sctp.h>
36 #include <netinet/sctp_header.h>
37 #include <netinet/sctp_pcb.h>
38 #include <netinet/sctp_var.h>
39 #include <netinet/sctputil.h>
40 #include <netinet/sctp_indata.h>
41 #include <netinet/sctp_output.h>
42 #include <netinet/sctp_auth.h>
43 
44 #ifdef SCTP_DEBUG
45 extern uint32_t sctp_debug_on;
46 
47 #define SCTP_AUTH_DEBUG		(sctp_debug_on & SCTP_DEBUG_AUTH1)
48 #define SCTP_AUTH_DEBUG2	(sctp_debug_on & SCTP_DEBUG_AUTH2)
49 #endif				/* SCTP_DEBUG */
50 
51 
52 inline void
53 sctp_clear_chunklist(sctp_auth_chklist_t * chklist)
54 {
55 	bzero(chklist, sizeof(*chklist));
56 	/* chklist->num_chunks = 0; */
57 }
58 
59 sctp_auth_chklist_t *
60 sctp_alloc_chunklist(void)
61 {
62 	sctp_auth_chklist_t *chklist;
63 
64 	SCTP_MALLOC(chklist, sctp_auth_chklist_t *, sizeof(*chklist),
65 	    "AUTH chklist");
66 	if (chklist == NULL) {
67 #ifdef SCTP_DEBUG
68 		if (sctp_debug_on & SCTP_AUTH_DEBUG) {
69 			printf("sctp_alloc_chunklist: failed to get memory!\n");
70 		}
71 #endif				/* SCTP_DEBUG */
72 	} else {
73 		sctp_clear_chunklist(chklist);
74 	}
75 	return (chklist);
76 }
77 
78 void
79 sctp_free_chunklist(sctp_auth_chklist_t * list)
80 {
81 	if (list != NULL)
82 		SCTP_FREE(list);
83 }
84 
85 sctp_auth_chklist_t *
86 sctp_copy_chunklist(sctp_auth_chklist_t * list)
87 {
88 	sctp_auth_chklist_t *new_list;
89 
90 	if (list == NULL)
91 		return (NULL);
92 
93 	/* get a new list */
94 	new_list = sctp_alloc_chunklist();
95 	if (new_list == NULL)
96 		return (NULL);
97 	/* copy it */
98 	bcopy(list, new_list, sizeof(*new_list));
99 
100 	return (new_list);
101 }
102 
103 
104 /*
105  * add a chunk to the required chunks list
106  */
107 int
108 sctp_auth_add_chunk(uint8_t chunk, sctp_auth_chklist_t * list)
109 {
110 	if (list == NULL)
111 		return (-1);
112 
113 	/* is chunk restricted? */
114 	if ((chunk == SCTP_INITIATION) ||
115 	    (chunk == SCTP_INITIATION_ACK) ||
116 	    (chunk == SCTP_SHUTDOWN_COMPLETE) ||
117 	    (chunk == SCTP_AUTHENTICATION)) {
118 		return (-1);
119 	}
120 	if (list->chunks[chunk] == 0) {
121 		list->chunks[chunk] = 1;
122 		list->num_chunks++;
123 #ifdef SCTP_DEBUG
124 		if (SCTP_AUTH_DEBUG)
125 			printf("SCTP: added chunk %u (0x%02x) to Auth list\n",
126 			    chunk, chunk);
127 #endif
128 	}
129 	return (0);
130 }
131 
132 /*
133  * delete a chunk from the required chunks list
134  */
135 int
136 sctp_auth_delete_chunk(uint8_t chunk, sctp_auth_chklist_t * list)
137 {
138 	if (list == NULL)
139 		return (-1);
140 
141 	/* is chunk restricted? */
142 	if ((chunk == SCTP_ASCONF) ||
143 	    (chunk == SCTP_ASCONF_ACK)) {
144 		return (-1);
145 	}
146 	if (list->chunks[chunk] == 1) {
147 		list->chunks[chunk] = 0;
148 		list->num_chunks--;
149 #ifdef SCTP_DEBUG
150 		if (SCTP_AUTH_DEBUG)
151 			printf("SCTP: deleted chunk %u (0x%02x) from Auth list\n",
152 			    chunk, chunk);
153 #endif
154 	}
155 	return (0);
156 }
157 
158 inline size_t
159 sctp_auth_get_chklist_size(const sctp_auth_chklist_t * list)
160 {
161 	if (list == NULL)
162 		return (0);
163 	else
164 		return (list->num_chunks);
165 }
166 
167 /*
168  * set the default list of chunks requiring AUTH
169  */
170 void
171 sctp_auth_set_default_chunks(sctp_auth_chklist_t * list)
172 {
173 	sctp_auth_add_chunk(SCTP_ASCONF, list);
174 	sctp_auth_add_chunk(SCTP_ASCONF_ACK, list);
175 }
176 
177 /*
178  * return the current number and list of required chunks caller must
179  * guarantee ptr has space for up to 256 bytes
180  */
181 int
182 sctp_serialize_auth_chunks(const sctp_auth_chklist_t * list, uint8_t * ptr)
183 {
184 	int i, count = 0;
185 
186 	if (list == NULL)
187 		return (0);
188 
189 	for (i = 0; i < 256; i++) {
190 		if (list->chunks[i] != 0) {
191 			*ptr++ = i;
192 			count++;
193 		}
194 	}
195 	return (count);
196 }
197 
198 int
199 sctp_pack_auth_chunks(const sctp_auth_chklist_t * list, uint8_t * ptr)
200 {
201 	int i, size = 0;
202 
203 	if (list == NULL)
204 		return (0);
205 
206 	if (list->num_chunks <= 32) {
207 		/* just list them, one byte each */
208 		for (i = 0; i < 256; i++) {
209 			if (list->chunks[i] != 0) {
210 				*ptr++ = i;
211 				size++;
212 			}
213 		}
214 	} else {
215 		int index, offset;
216 
217 		/* pack into a 32 byte bitfield */
218 		for (i = 0; i < 256; i++) {
219 			if (list->chunks[i] != 0) {
220 				index = i / 8;
221 				offset = i % 8;
222 				ptr[index] |= (1 << offset);
223 			}
224 		}
225 		size = 32;
226 	}
227 	return (size);
228 }
229 
230 int
231 sctp_unpack_auth_chunks(const uint8_t * ptr, uint8_t num_chunks,
232     sctp_auth_chklist_t * list)
233 {
234 	int i;
235 	int size;
236 
237 	if (list == NULL)
238 		return (0);
239 
240 	if (num_chunks <= 32) {
241 		/* just pull them, one byte each */
242 		for (i = 0; i < num_chunks; i++) {
243 			sctp_auth_add_chunk(*ptr++, list);
244 		}
245 		size = num_chunks;
246 	} else {
247 		int index, offset;
248 
249 		/* unpack from a 32 byte bitfield */
250 		for (index = 0; index < 32; index++) {
251 			for (offset = 0; offset < 8; offset++) {
252 				if (ptr[index] & (1 << offset)) {
253 					sctp_auth_add_chunk((index * 8) + offset, list);
254 				}
255 			}
256 		}
257 		size = 32;
258 	}
259 	return (size);
260 }
261 
262 
263 /*
264  * allocate structure space for a key of length keylen
265  */
266 sctp_key_t *
267 sctp_alloc_key(uint32_t keylen)
268 {
269 	sctp_key_t *new_key;
270 
271 	SCTP_MALLOC(new_key, sctp_key_t *, sizeof(*new_key) + keylen,
272 	    "AUTH key");
273 	if (new_key == NULL) {
274 		/* out of memory */
275 		return (NULL);
276 	}
277 	new_key->keylen = keylen;
278 	return (new_key);
279 }
280 
281 void
282 sctp_free_key(sctp_key_t * key)
283 {
284 	if (key != NULL)
285 		SCTP_FREE(key);
286 }
287 
288 void
289 sctp_print_key(sctp_key_t * key, const char *str)
290 {
291 	uint32_t i;
292 
293 	if (key == NULL) {
294 		printf("%s: [Null key]\n", str);
295 		return;
296 	}
297 	printf("%s: len %u, ", str, key->keylen);
298 	if (key->keylen) {
299 		for (i = 0; i < key->keylen; i++)
300 			printf("%02x", key->key[i]);
301 		printf("\n");
302 	} else {
303 		printf("[Null key]\n");
304 	}
305 }
306 
307 void
308 sctp_show_key(sctp_key_t * key, const char *str)
309 {
310 	uint32_t i;
311 
312 	if (key == NULL) {
313 		printf("%s: [Null key]\n", str);
314 		return;
315 	}
316 	printf("%s: len %u, ", str, key->keylen);
317 	if (key->keylen) {
318 		for (i = 0; i < key->keylen; i++)
319 			printf("%02x", key->key[i]);
320 		printf("\n");
321 	} else {
322 		printf("[Null key]\n");
323 	}
324 }
325 
326 static inline uint32_t
327 sctp_get_keylen(sctp_key_t * key)
328 {
329 	if (key != NULL)
330 		return (key->keylen);
331 	else
332 		return (0);
333 }
334 
335 /*
336  * generate a new random key of length 'keylen'
337  */
338 sctp_key_t *
339 sctp_generate_random_key(uint32_t keylen)
340 {
341 	sctp_key_t *new_key;
342 
343 	/* validate keylen */
344 	if (keylen > SCTP_AUTH_RANDOM_SIZE_MAX)
345 		keylen = SCTP_AUTH_RANDOM_SIZE_MAX;
346 
347 	new_key = sctp_alloc_key(keylen);
348 	if (new_key == NULL) {
349 		/* out of memory */
350 		return (NULL);
351 	}
352 	SCTP_READ_RANDOM(new_key->key, keylen);
353 	new_key->keylen = keylen;
354 	return (new_key);
355 }
356 
357 sctp_key_t *
358 sctp_set_key(uint8_t * key, uint32_t keylen)
359 {
360 	sctp_key_t *new_key;
361 
362 	new_key = sctp_alloc_key(keylen);
363 	if (new_key == NULL) {
364 		/* out of memory */
365 		return (NULL);
366 	}
367 	bcopy(key, new_key->key, keylen);
368 	return (new_key);
369 }
370 
371 /*
372  * given two keys of variable size, compute which key is "larger/smaller"
373  * returns: 1 if key1 > key2 -1 if key1 < key2 0 if key1 = key2
374  */
375 static int
376 sctp_compare_key(sctp_key_t * key1, sctp_key_t * key2)
377 {
378 	uint32_t maxlen;
379 	uint32_t i;
380 	uint32_t key1len, key2len;
381 	uint8_t *key_1, *key_2;
382 	uint8_t temp[SCTP_AUTH_RANDOM_SIZE_MAX];
383 
384 	/* sanity/length check */
385 	key1len = sctp_get_keylen(key1);
386 	key2len = sctp_get_keylen(key2);
387 	if ((key1len == 0) && (key2len == 0))
388 		return (0);
389 	else if (key1len == 0)
390 		return (-1);
391 	else if (key2len == 0)
392 		return (1);
393 
394 	if (key1len != key2len) {
395 		if (key1len >= key2len)
396 			maxlen = key1len;
397 		else
398 			maxlen = key2len;
399 		bzero(temp, maxlen);
400 		if (key1len < maxlen) {
401 			/* prepend zeroes to key1 */
402 			bcopy(key1->key, temp + (maxlen - key1len), key1len);
403 			key_1 = temp;
404 			key_2 = key2->key;
405 		} else {
406 			/* prepend zeroes to key2 */
407 			bcopy(key2->key, temp + (maxlen - key2len), key2len);
408 			key_1 = key1->key;
409 			key_2 = temp;
410 		}
411 	} else {
412 		maxlen = key1len;
413 		key_1 = key1->key;
414 		key_2 = key2->key;
415 	}
416 
417 	for (i = 0; i < maxlen; i++) {
418 		if (*key_1 > *key_2)
419 			return (1);
420 		else if (*key_1 < *key_2)
421 			return (-1);
422 		key_1++;
423 		key_2++;
424 	}
425 
426 	/* keys are equal value, so check lengths */
427 	if (key1len == key2len)
428 		return (0);
429 	else if (key1len < key2len)
430 		return (-1);
431 	else
432 		return (1);
433 }
434 
435 /*
436  * generate the concatenated keying material based on the two keys and the
437  * shared key (if available). draft-ietf-tsvwg-auth specifies the specific
438  * order for concatenation
439  */
440 sctp_key_t *
441 sctp_compute_hashkey(sctp_key_t * key1, sctp_key_t * key2, sctp_key_t * shared)
442 {
443 	uint32_t keylen;
444 	sctp_key_t *new_key;
445 	uint8_t *key_ptr;
446 
447 	keylen = sctp_get_keylen(key1) + sctp_get_keylen(key2) +
448 	    sctp_get_keylen(shared);
449 
450 	if (keylen > 0) {
451 		/* get space for the new key */
452 		new_key = sctp_alloc_key(keylen);
453 		if (new_key == NULL) {
454 			/* out of memory */
455 			return (NULL);
456 		}
457 		new_key->keylen = keylen;
458 		key_ptr = new_key->key;
459 	} else {
460 		/* all keys empty/null?! */
461 		return (NULL);
462 	}
463 
464 	/* concatenate the keys */
465 	if (sctp_compare_key(key1, key2) <= 0) {
466 		/* key is key1 + shared + key2 */
467 		if (sctp_get_keylen(key1)) {
468 			bcopy(key1->key, key_ptr, key1->keylen);
469 			key_ptr += key1->keylen;
470 		}
471 		if (sctp_get_keylen(shared)) {
472 			bcopy(shared->key, key_ptr, shared->keylen);
473 			key_ptr += shared->keylen;
474 		}
475 		if (sctp_get_keylen(key2)) {
476 			bcopy(key2->key, key_ptr, key2->keylen);
477 			key_ptr += key2->keylen;
478 		}
479 	} else {
480 		/* key is key2 + shared + key1 */
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(shared)) {
486 			bcopy(shared->key, key_ptr, shared->keylen);
487 			key_ptr += shared->keylen;
488 		}
489 		if (sctp_get_keylen(key1)) {
490 			bcopy(key1->key, key_ptr, key1->keylen);
491 			key_ptr += key1->keylen;
492 		}
493 	}
494 	return (new_key);
495 }
496 
497 
498 sctp_sharedkey_t *
499 sctp_alloc_sharedkey(void)
500 {
501 	sctp_sharedkey_t *new_key;
502 
503 	SCTP_MALLOC(new_key, sctp_sharedkey_t *, sizeof(*new_key),
504 	    "AUTH skey");
505 	if (new_key == NULL) {
506 		/* out of memory */
507 		return (NULL);
508 	}
509 	new_key->keyid = 0;
510 	new_key->key = NULL;
511 	return (new_key);
512 }
513 
514 void
515 sctp_free_sharedkey(sctp_sharedkey_t * skey)
516 {
517 	if (skey != NULL) {
518 		if (skey->key != NULL)
519 			sctp_free_key(skey->key);
520 		SCTP_FREE(skey);
521 	}
522 }
523 
524 sctp_sharedkey_t *
525 sctp_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) {
530 		if (skey->keyid == key_id)
531 			return (skey);
532 	}
533 	return (NULL);
534 }
535 
536 void
537 sctp_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) || (new_skey == NULL))
543 		return;
544 
545 	/* insert into an empty list? */
546 	if (SCTP_LIST_EMPTY(shared_keys)) {
547 		LIST_INSERT_HEAD(shared_keys, new_skey, next);
548 		return;
549 	}
550 	/* insert into the existing list, ordered by key id */
551 	LIST_FOREACH(skey, shared_keys, next) {
552 		if (new_skey->keyid < skey->keyid) {
553 			/* insert it before here */
554 			LIST_INSERT_BEFORE(skey, new_skey, next);
555 			return;
556 		} else if (new_skey->keyid == skey->keyid) {
557 			/* replace the existing key */
558 #ifdef SCTP_DEBUG
559 			if (SCTP_AUTH_DEBUG)
560 				printf("replacing shared key id %u\n", new_skey->keyid);
561 #endif
562 			LIST_INSERT_BEFORE(skey, new_skey, next);
563 			LIST_REMOVE(skey, next);
564 			sctp_free_sharedkey(skey);
565 			return;
566 		}
567 		if (LIST_NEXT(skey, next) == NULL) {
568 			/* belongs at the end of the list */
569 			LIST_INSERT_AFTER(skey, new_skey, next);
570 			return;
571 		}
572 	}
573 }
574 
575 static sctp_sharedkey_t *
576 sctp_copy_sharedkey(const sctp_sharedkey_t * skey)
577 {
578 	sctp_sharedkey_t *new_skey;
579 
580 	if (skey == NULL)
581 		return (NULL);
582 	new_skey = sctp_alloc_sharedkey();
583 	if (new_skey == NULL)
584 		return (NULL);
585 	if (skey->key != NULL)
586 		new_skey->key = sctp_set_key(skey->key->key, skey->key->keylen);
587 	else
588 		new_skey->key = NULL;
589 	new_skey->keyid = skey->keyid;
590 	return (new_skey);
591 }
592 
593 int
594 sctp_copy_skeylist(const struct sctp_keyhead *src, struct sctp_keyhead *dest)
595 {
596 	sctp_sharedkey_t *skey, *new_skey;
597 	int count = 0;
598 
599 	if ((src == NULL) || (dest == NULL))
600 		return (0);
601 	LIST_FOREACH(skey, src, next) {
602 		new_skey = sctp_copy_sharedkey(skey);
603 		if (new_skey != NULL) {
604 			sctp_insert_sharedkey(dest, new_skey);
605 			count++;
606 		}
607 	}
608 	return (count);
609 }
610 
611 
612 sctp_hmaclist_t *
613 sctp_alloc_hmaclist(uint8_t num_hmacs)
614 {
615 	sctp_hmaclist_t *new_list;
616 	int alloc_size;
617 
618 	alloc_size = sizeof(*new_list) + num_hmacs * sizeof(new_list->hmac[0]);
619 	SCTP_MALLOC(new_list, sctp_hmaclist_t *, alloc_size,
620 	    "AUTH HMAC list");
621 	if (new_list == NULL) {
622 		/* out of memory */
623 		return (NULL);
624 	}
625 	new_list->max_algo = num_hmacs;
626 	new_list->num_algo = 0;
627 	return (new_list);
628 }
629 
630 void
631 sctp_free_hmaclist(sctp_hmaclist_t * list)
632 {
633 	if (list != NULL) {
634 		SCTP_FREE(list);
635 		list = NULL;
636 	}
637 }
638 
639 int
640 sctp_auth_add_hmacid(sctp_hmaclist_t * list, uint16_t hmac_id)
641 {
642 	if (list == NULL)
643 		return (-1);
644 	if (list->num_algo == list->max_algo) {
645 #ifdef SCTP_DEBUG
646 		if (SCTP_AUTH_DEBUG)
647 			printf("SCTP: HMAC id list full, ignoring add %u\n", hmac_id);
648 #endif
649 		return (-1);
650 	}
651 	if ((hmac_id != SCTP_AUTH_HMAC_ID_SHA1) &&
652 #ifdef HAVE_SHA224
653 	    (hmac_id != SCTP_AUTH_HMAC_ID_SHA224) &&
654 #endif
655 #ifdef HAVE_SHA2
656 	    (hmac_id != SCTP_AUTH_HMAC_ID_SHA256) &&
657 	    (hmac_id != SCTP_AUTH_HMAC_ID_SHA384) &&
658 	    (hmac_id != SCTP_AUTH_HMAC_ID_SHA512) &&
659 #endif
660 	    (hmac_id != SCTP_AUTH_HMAC_ID_MD5)) {
661 		return (-1);
662 	}
663 #ifdef SCTP_DEBUG
664 	if (SCTP_AUTH_DEBUG)
665 		printf("SCTP: add HMAC id %u to list\n", hmac_id);
666 #endif
667 	list->hmac[list->num_algo++] = hmac_id;
668 	return (0);
669 }
670 
671 sctp_hmaclist_t *
672 sctp_copy_hmaclist(sctp_hmaclist_t * list)
673 {
674 	sctp_hmaclist_t *new_list;
675 	int i;
676 
677 	if (list == NULL)
678 		return (NULL);
679 	/* get a new list */
680 	new_list = sctp_alloc_hmaclist(list->max_algo);
681 	if (new_list == NULL)
682 		return (NULL);
683 	/* copy it */
684 	new_list->max_algo = list->max_algo;
685 	new_list->num_algo = list->num_algo;
686 	for (i = 0; i < list->num_algo; i++)
687 		new_list->hmac[i] = list->hmac[i];
688 	return (new_list);
689 }
690 
691 sctp_hmaclist_t *
692 sctp_default_supported_hmaclist(void)
693 {
694 	sctp_hmaclist_t *new_list;
695 
696 	new_list = sctp_alloc_hmaclist(2);
697 	if (new_list == NULL)
698 		return (NULL);
699 	sctp_auth_add_hmacid(new_list, SCTP_AUTH_HMAC_ID_SHA1);
700 	sctp_auth_add_hmacid(new_list, SCTP_AUTH_HMAC_ID_SHA256);
701 	return (new_list);
702 }
703 
704 /*
705  * HMAC algos are listed in priority/preference order find the best HMAC id
706  * to use for the peer based on local support
707  */
708 uint16_t
709 sctp_negotiate_hmacid(sctp_hmaclist_t * peer, sctp_hmaclist_t * local)
710 {
711 	int i, j;
712 
713 	if ((local == NULL) || (peer == NULL))
714 		return (SCTP_AUTH_HMAC_ID_RSVD);
715 
716 	for (i = 0; i < peer->num_algo; i++) {
717 		for (j = 0; j < local->num_algo; j++) {
718 			if (peer->hmac[i] == local->hmac[j]) {
719 #ifndef SCTP_AUTH_DRAFT_04
720 				/* "skip" MD5 as it's been deprecated */
721 				if (peer->hmac[i] == SCTP_AUTH_HMAC_ID_MD5)
722 					continue;
723 #endif
724 
725 				/* found the "best" one */
726 #ifdef SCTP_DEBUG
727 				if (SCTP_AUTH_DEBUG)
728 					printf("SCTP: negotiated peer HMAC id %u\n", peer->hmac[i]);
729 #endif
730 				return (peer->hmac[i]);
731 			}
732 		}
733 	}
734 	/* didn't find one! */
735 	return (SCTP_AUTH_HMAC_ID_RSVD);
736 }
737 
738 /*
739  * serialize the HMAC algo list and return space used caller must guarantee
740  * ptr has appropriate space
741  */
742 int
743 sctp_serialize_hmaclist(sctp_hmaclist_t * list, uint8_t * ptr)
744 {
745 	int i;
746 	uint16_t hmac_id;
747 
748 	if (list == NULL)
749 		return (0);
750 
751 	for (i = 0; i < list->num_algo; i++) {
752 		hmac_id = htons(list->hmac[i]);
753 		bcopy(&hmac_id, ptr, sizeof(hmac_id));
754 		ptr += sizeof(hmac_id);
755 	}
756 	return (list->num_algo * sizeof(hmac_id));
757 }
758 
759 int
760 sctp_verify_hmac_param(struct sctp_auth_hmac_algo *hmacs, uint32_t num_hmacs)
761 {
762 	uint32_t i;
763 	uint16_t hmac_id;
764 	uint32_t sha1_supported = 0;
765 
766 	for (i = 0; i < num_hmacs; i++) {
767 		hmac_id = ntohs(hmacs->hmac_ids[i]);
768 		if (hmac_id == SCTP_AUTH_HMAC_ID_SHA1)
769 			sha1_supported = 1;
770 	}
771 	/* all HMAC id's are supported */
772 	if (sha1_supported == 0)
773 		return (-1);
774 	else
775 		return (0);
776 }
777 
778 sctp_authinfo_t *
779 sctp_alloc_authinfo(void)
780 {
781 	sctp_authinfo_t *new_authinfo;
782 
783 	SCTP_MALLOC(new_authinfo, sctp_authinfo_t *, sizeof(*new_authinfo),
784 	    "AUTH info");
785 	if (new_authinfo == NULL) {
786 		/* out of memory */
787 		return (NULL);
788 	}
789 	bzero(&new_authinfo, sizeof(*new_authinfo));
790 	return (new_authinfo);
791 }
792 
793 void
794 sctp_free_authinfo(sctp_authinfo_t * authinfo)
795 {
796 	if (authinfo == NULL)
797 		return;
798 
799 	if (authinfo->random != NULL)
800 		sctp_free_key(authinfo->random);
801 	if (authinfo->peer_random != NULL)
802 		sctp_free_key(authinfo->peer_random);
803 	if (authinfo->assoc_key != NULL)
804 		sctp_free_key(authinfo->assoc_key);
805 	if (authinfo->recv_key != NULL)
806 		sctp_free_key(authinfo->recv_key);
807 
808 	/* We are NOT dynamically allocating authinfo's right now... */
809 	/* SCTP_FREE(authinfo); */
810 }
811 
812 
813 inline uint32_t
814 sctp_get_auth_chunk_len(uint16_t hmac_algo)
815 {
816 	int size;
817 
818 	size = sizeof(struct sctp_auth_chunk) + sctp_get_hmac_digest_len(hmac_algo);
819 	return (SCTP_SIZE32(size));
820 }
821 
822 uint32_t
823 sctp_get_hmac_digest_len(uint16_t hmac_algo)
824 {
825 	switch (hmac_algo) {
826 	case SCTP_AUTH_HMAC_ID_SHA1:
827 		return (SCTP_AUTH_DIGEST_LEN_SHA1);
828 	case SCTP_AUTH_HMAC_ID_MD5:
829 		return (SCTP_AUTH_DIGEST_LEN_MD5);
830 #ifdef HAVE_SHA224
831 	case SCTP_AUTH_HMAC_ID_SHA224:
832 		return (SCTP_AUTH_DIGEST_LEN_SHA224);
833 #endif
834 #ifdef HAVE_SHA2
835 	case SCTP_AUTH_HMAC_ID_SHA256:
836 		return (SCTP_AUTH_DIGEST_LEN_SHA256);
837 	case SCTP_AUTH_HMAC_ID_SHA384:
838 		return (SCTP_AUTH_DIGEST_LEN_SHA384);
839 	case SCTP_AUTH_HMAC_ID_SHA512:
840 		return (SCTP_AUTH_DIGEST_LEN_SHA512);
841 #endif
842 	default:
843 		/* unknown HMAC algorithm: can't do anything */
844 		return (0);
845 	}			/* end switch */
846 }
847 
848 static inline int
849 sctp_get_hmac_block_len(uint16_t hmac_algo)
850 {
851 	switch (hmac_algo) {
852 		case SCTP_AUTH_HMAC_ID_SHA1:
853 		case SCTP_AUTH_HMAC_ID_MD5:
854 #ifdef HAVE_SHA224
855 		case SCTP_AUTH_HMAC_ID_SHA224:
856 		return (64);
857 #endif
858 #ifdef HAVE_SHA2
859 	case SCTP_AUTH_HMAC_ID_SHA256:
860 		return (64);
861 	case SCTP_AUTH_HMAC_ID_SHA384:
862 	case SCTP_AUTH_HMAC_ID_SHA512:
863 		return (128);
864 #endif
865 	case SCTP_AUTH_HMAC_ID_RSVD:
866 	default:
867 		/* unknown HMAC algorithm: can't do anything */
868 		return (0);
869 	}			/* end switch */
870 }
871 
872 static void
873 sctp_hmac_init(uint16_t hmac_algo, sctp_hash_context_t * ctx)
874 {
875 	switch (hmac_algo) {
876 		case SCTP_AUTH_HMAC_ID_SHA1:
877 		SHA1_Init(&ctx->sha1);
878 		break;
879 	case SCTP_AUTH_HMAC_ID_MD5:
880 		MD5_Init(&ctx->md5);
881 		break;
882 #ifdef HAVE_SHA224
883 	case SCTP_AUTH_HMAC_ID_SHA224:
884 		break;
885 #endif
886 #ifdef HAVE_SHA2
887 	case SCTP_AUTH_HMAC_ID_SHA256:
888 		SHA256_Init(&ctx->sha256);
889 		break;
890 	case SCTP_AUTH_HMAC_ID_SHA384:
891 		SHA384_Init(&ctx->sha384);
892 		break;
893 	case SCTP_AUTH_HMAC_ID_SHA512:
894 		SHA512_Init(&ctx->sha512);
895 		break;
896 #endif
897 	case SCTP_AUTH_HMAC_ID_RSVD:
898 	default:
899 		/* unknown HMAC algorithm: can't do anything */
900 		return;
901 	}			/* end switch */
902 }
903 
904 static void
905 sctp_hmac_update(uint16_t hmac_algo, sctp_hash_context_t * ctx,
906     uint8_t * text, uint32_t textlen)
907 {
908 	switch (hmac_algo) {
909 		case SCTP_AUTH_HMAC_ID_SHA1:
910 		SHA1_Update(&ctx->sha1, text, textlen);
911 		break;
912 	case SCTP_AUTH_HMAC_ID_MD5:
913 		MD5_Update(&ctx->md5, text, textlen);
914 		break;
915 #ifdef HAVE_SHA224
916 	case SCTP_AUTH_HMAC_ID_SHA224:
917 		break;
918 #endif
919 #ifdef HAVE_SHA2
920 	case SCTP_AUTH_HMAC_ID_SHA256:
921 		SHA256_Update(&ctx->sha256, text, textlen);
922 		break;
923 	case SCTP_AUTH_HMAC_ID_SHA384:
924 		SHA384_Update(&ctx->sha384, text, textlen);
925 		break;
926 	case SCTP_AUTH_HMAC_ID_SHA512:
927 		SHA512_Update(&ctx->sha512, text, textlen);
928 		break;
929 #endif
930 	case SCTP_AUTH_HMAC_ID_RSVD:
931 	default:
932 		/* unknown HMAC algorithm: can't do anything */
933 		return;
934 	}			/* end switch */
935 }
936 
937 static void
938 sctp_hmac_final(uint16_t hmac_algo, sctp_hash_context_t * ctx,
939     uint8_t * digest)
940 {
941 	switch (hmac_algo) {
942 		case SCTP_AUTH_HMAC_ID_SHA1:
943 		SHA1_Final(digest, &ctx->sha1);
944 		break;
945 	case SCTP_AUTH_HMAC_ID_MD5:
946 		MD5_Final(digest, &ctx->md5);
947 		break;
948 #ifdef HAVE_SHA224
949 	case SCTP_AUTH_HMAC_ID_SHA224:
950 		break;
951 #endif
952 #ifdef HAVE_SHA2
953 	case SCTP_AUTH_HMAC_ID_SHA256:
954 		SHA256_Final(digest, &ctx->sha256);
955 		break;
956 	case SCTP_AUTH_HMAC_ID_SHA384:
957 		/* SHA384 is truncated SHA512 */
958 		SHA384_Final(digest, &ctx->sha384);
959 		break;
960 	case SCTP_AUTH_HMAC_ID_SHA512:
961 		SHA512_Final(digest, &ctx->sha512);
962 		break;
963 #endif
964 	case SCTP_AUTH_HMAC_ID_RSVD:
965 	default:
966 		/* unknown HMAC algorithm: can't do anything */
967 		return;
968 	}			/* end switch */
969 }
970 
971 /*
972  * Keyed-Hashing for Message Authentication: FIPS 198 (RFC 2104)
973  *
974  * Compute the HMAC digest using the desired hash key, text, and HMAC
975  * algorithm.  Resulting digest is placed in 'digest' and digest length
976  * is returned, if the HMAC was performed.
977  *
978  * WARNING: it is up to the caller to supply sufficient space to hold the
979  * resultant digest.
980  */
981 uint32_t
982 sctp_hmac(uint16_t hmac_algo, uint8_t * key, uint32_t keylen,
983     uint8_t * text, uint32_t textlen, uint8_t * digest)
984 {
985 	uint32_t digestlen;
986 	uint32_t blocklen;
987 	sctp_hash_context_t ctx;
988 	uint8_t ipad[128], opad[128];	/* keyed hash inner/outer pads */
989 	uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX];
990 	uint32_t i;
991 
992 	/* sanity check the material and length */
993 	if ((key == NULL) || (keylen == 0) || (text == NULL) ||
994 	    (textlen == 0) || (digest == NULL)) {
995 		/* can't do HMAC with empty key or text or digest store */
996 		return (0);
997 	}
998 	/* validate the hmac algo and get the digest length */
999 	digestlen = sctp_get_hmac_digest_len(hmac_algo);
1000 	if (digestlen == 0)
1001 		return (0);
1002 
1003 	/* hash the key if it is longer than the hash block size */
1004 	blocklen = sctp_get_hmac_block_len(hmac_algo);
1005 	if (keylen > blocklen) {
1006 		sctp_hmac_init(hmac_algo, &ctx);
1007 		sctp_hmac_update(hmac_algo, &ctx, key, keylen);
1008 		sctp_hmac_final(hmac_algo, &ctx, temp);
1009 		/* set the hashed key as the key */
1010 		keylen = digestlen;
1011 		key = temp;
1012 	}
1013 	/* initialize the inner/outer pads with the key and "append" zeroes */
1014 	bzero(ipad, blocklen);
1015 	bzero(opad, blocklen);
1016 	bcopy(key, ipad, keylen);
1017 	bcopy(key, opad, keylen);
1018 
1019 	/* XOR the key with ipad and opad values */
1020 	for (i = 0; i < blocklen; i++) {
1021 		ipad[i] ^= 0x36;
1022 		opad[i] ^= 0x5c;
1023 	}
1024 
1025 	/* perform inner hash */
1026 	sctp_hmac_init(hmac_algo, &ctx);
1027 	sctp_hmac_update(hmac_algo, &ctx, ipad, blocklen);
1028 	sctp_hmac_update(hmac_algo, &ctx, text, textlen);
1029 	sctp_hmac_final(hmac_algo, &ctx, temp);
1030 
1031 	/* perform outer hash */
1032 	sctp_hmac_init(hmac_algo, &ctx);
1033 	sctp_hmac_update(hmac_algo, &ctx, opad, blocklen);
1034 	sctp_hmac_update(hmac_algo, &ctx, temp, digestlen);
1035 	sctp_hmac_final(hmac_algo, &ctx, digest);
1036 
1037 	return (digestlen);
1038 }
1039 
1040 /* mbuf version */
1041 uint32_t
1042 sctp_hmac_m(uint16_t hmac_algo, uint8_t * key, uint32_t keylen,
1043     struct mbuf *m, uint32_t m_offset, uint8_t * digest)
1044 {
1045 	uint32_t digestlen;
1046 	uint32_t blocklen;
1047 	sctp_hash_context_t ctx;
1048 	uint8_t ipad[128], opad[128];	/* keyed hash inner/outer pads */
1049 	uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX];
1050 	uint32_t i;
1051 	struct mbuf *m_tmp;
1052 
1053 	/* sanity check the material and length */
1054 	if ((key == NULL) || (keylen == 0) || (m == NULL) || (digest == NULL)) {
1055 		/* can't do HMAC with empty key or text or digest store */
1056 		return (0);
1057 	}
1058 	/* validate the hmac algo and get the digest length */
1059 	digestlen = sctp_get_hmac_digest_len(hmac_algo);
1060 	if (digestlen == 0)
1061 		return (0);
1062 
1063 	/* hash the key if it is longer than the hash block size */
1064 	blocklen = sctp_get_hmac_block_len(hmac_algo);
1065 	if (keylen > blocklen) {
1066 		sctp_hmac_init(hmac_algo, &ctx);
1067 		sctp_hmac_update(hmac_algo, &ctx, key, keylen);
1068 		sctp_hmac_final(hmac_algo, &ctx, temp);
1069 		/* set the hashed key as the key */
1070 		keylen = digestlen;
1071 		key = temp;
1072 	}
1073 	/* initialize the inner/outer pads with the key and "append" zeroes */
1074 	bzero(ipad, blocklen);
1075 	bzero(opad, blocklen);
1076 	bcopy(key, ipad, keylen);
1077 	bcopy(key, opad, keylen);
1078 
1079 	/* XOR the key with ipad and opad values */
1080 	for (i = 0; i < blocklen; i++) {
1081 		ipad[i] ^= 0x36;
1082 		opad[i] ^= 0x5c;
1083 	}
1084 
1085 	/* perform inner hash */
1086 	sctp_hmac_init(hmac_algo, &ctx);
1087 	sctp_hmac_update(hmac_algo, &ctx, ipad, blocklen);
1088 	/* find the correct starting mbuf and offset (get start of text) */
1089 	m_tmp = m;
1090 	while ((m_tmp != NULL) && (m_offset >= (uint32_t) SCTP_BUF_LEN(m_tmp))) {
1091 		m_offset -= SCTP_BUF_LEN(m_tmp);
1092 		m_tmp = SCTP_BUF_NEXT(m_tmp);
1093 	}
1094 	/* now use the rest of the mbuf chain for the text */
1095 	while (m_tmp != NULL) {
1096 		sctp_hmac_update(hmac_algo, &ctx, mtod(m_tmp, uint8_t *) + m_offset,
1097 		    SCTP_BUF_LEN(m_tmp) - m_offset);
1098 
1099 		/* clear the offset since it's only for the first mbuf */
1100 		m_offset = 0;
1101 		m_tmp = SCTP_BUF_NEXT(m_tmp);
1102 	}
1103 	sctp_hmac_final(hmac_algo, &ctx, temp);
1104 
1105 	/* perform outer hash */
1106 	sctp_hmac_init(hmac_algo, &ctx);
1107 	sctp_hmac_update(hmac_algo, &ctx, opad, blocklen);
1108 	sctp_hmac_update(hmac_algo, &ctx, temp, digestlen);
1109 	sctp_hmac_final(hmac_algo, &ctx, digest);
1110 
1111 	return (digestlen);
1112 }
1113 
1114 /*
1115  * verify the HMAC digest using the desired hash key, text, and HMAC
1116  * algorithm. Returns -1 on error, 0 on success.
1117  */
1118 int
1119 sctp_verify_hmac(uint16_t hmac_algo, uint8_t * key, uint32_t keylen,
1120     uint8_t * text, uint32_t textlen,
1121     uint8_t * digest, uint32_t digestlen)
1122 {
1123 	uint32_t len;
1124 	uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX];
1125 
1126 	/* sanity check the material and length */
1127 	if ((key == NULL) || (keylen == 0) ||
1128 	    (text == NULL) || (textlen == 0) || (digest == NULL)) {
1129 		/* can't do HMAC with empty key or text or digest */
1130 		return (-1);
1131 	}
1132 	len = sctp_get_hmac_digest_len(hmac_algo);
1133 	if ((len == 0) || (digestlen != len))
1134 		return (-1);
1135 
1136 	/* compute the expected hash */
1137 	if (sctp_hmac(hmac_algo, key, keylen, text, textlen, temp) != len)
1138 		return (-1);
1139 
1140 	if (memcmp(digest, temp, digestlen) != 0)
1141 		return (-1);
1142 	else
1143 		return (0);
1144 }
1145 
1146 
1147 /*
1148  * computes the requested HMAC using a key struct (which may be modified if
1149  * the keylen exceeds the HMAC block len).
1150  */
1151 uint32_t
1152 sctp_compute_hmac(uint16_t hmac_algo, sctp_key_t * key, uint8_t * text,
1153     uint32_t textlen, uint8_t * digest)
1154 {
1155 	uint32_t digestlen;
1156 	uint32_t blocklen;
1157 	sctp_hash_context_t ctx;
1158 	uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX];
1159 
1160 	/* sanity check */
1161 	if ((key == NULL) || (text == NULL) || (textlen == 0) ||
1162 	    (digest == NULL)) {
1163 		/* can't do HMAC with empty key or text or digest store */
1164 		return (0);
1165 	}
1166 	/* validate the hmac algo and get the digest length */
1167 	digestlen = sctp_get_hmac_digest_len(hmac_algo);
1168 	if (digestlen == 0)
1169 		return (0);
1170 
1171 	/* hash the key if it is longer than the hash block size */
1172 	blocklen = sctp_get_hmac_block_len(hmac_algo);
1173 	if (key->keylen > blocklen) {
1174 		sctp_hmac_init(hmac_algo, &ctx);
1175 		sctp_hmac_update(hmac_algo, &ctx, key->key, key->keylen);
1176 		sctp_hmac_final(hmac_algo, &ctx, temp);
1177 		/* save the hashed key as the new key */
1178 		key->keylen = digestlen;
1179 		bcopy(temp, key->key, key->keylen);
1180 	}
1181 	return (sctp_hmac(hmac_algo, key->key, key->keylen, text, textlen,
1182 	    digest));
1183 }
1184 
1185 /* mbuf version */
1186 uint32_t
1187 sctp_compute_hmac_m(uint16_t hmac_algo, sctp_key_t * key, struct mbuf *m,
1188     uint32_t m_offset, uint8_t * digest)
1189 {
1190 	uint32_t digestlen;
1191 	uint32_t blocklen;
1192 	sctp_hash_context_t ctx;
1193 	uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX];
1194 
1195 	/* sanity check */
1196 	if ((key == NULL) || (m == NULL) || (digest == NULL)) {
1197 		/* can't do HMAC with empty key or text or digest store */
1198 		return (0);
1199 	}
1200 	/* validate the hmac algo and get the digest length */
1201 	digestlen = sctp_get_hmac_digest_len(hmac_algo);
1202 	if (digestlen == 0)
1203 		return (0);
1204 
1205 	/* hash the key if it is longer than the hash block size */
1206 	blocklen = sctp_get_hmac_block_len(hmac_algo);
1207 	if (key->keylen > blocklen) {
1208 		sctp_hmac_init(hmac_algo, &ctx);
1209 		sctp_hmac_update(hmac_algo, &ctx, key->key, key->keylen);
1210 		sctp_hmac_final(hmac_algo, &ctx, temp);
1211 		/* save the hashed key as the new key */
1212 		key->keylen = digestlen;
1213 		bcopy(temp, key->key, key->keylen);
1214 	}
1215 	return (sctp_hmac_m(hmac_algo, key->key, key->keylen, m, m_offset, digest));
1216 }
1217 
1218 int
1219 sctp_auth_is_supported_hmac(sctp_hmaclist_t * list, uint16_t id)
1220 {
1221 	int i;
1222 
1223 	if ((list == NULL) || (id == SCTP_AUTH_HMAC_ID_RSVD))
1224 		return (0);
1225 
1226 	for (i = 0; i < list->num_algo; i++)
1227 		if (list->hmac[i] == id)
1228 			return (1);
1229 
1230 	/* not in the list */
1231 	return (0);
1232 }
1233 
1234 
1235 /*
1236  * clear any cached key(s) if they match the given key id on an association
1237  * the cached key(s) will be recomputed and re-cached at next use. ASSUMES
1238  * TCB_LOCK is already held
1239  */
1240 void
1241 sctp_clear_cachedkeys(struct sctp_tcb *stcb, uint16_t keyid)
1242 {
1243 	if (stcb == NULL)
1244 		return;
1245 
1246 	if (keyid == stcb->asoc.authinfo.assoc_keyid) {
1247 		sctp_free_key(stcb->asoc.authinfo.assoc_key);
1248 		stcb->asoc.authinfo.assoc_key = NULL;
1249 	}
1250 	if (keyid == stcb->asoc.authinfo.recv_keyid) {
1251 		sctp_free_key(stcb->asoc.authinfo.recv_key);
1252 		stcb->asoc.authinfo.recv_key = NULL;
1253 	}
1254 }
1255 
1256 /*
1257  * clear any cached key(s) if they match the given key id for all assocs on
1258  * an association ASSUMES INP_WLOCK is already held
1259  */
1260 void
1261 sctp_clear_cachedkeys_ep(struct sctp_inpcb *inp, uint16_t keyid)
1262 {
1263 	struct sctp_tcb *stcb;
1264 
1265 	if (inp == NULL)
1266 		return;
1267 
1268 	/* clear the cached keys on all assocs on this instance */
1269 	LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
1270 		SCTP_TCB_LOCK(stcb);
1271 		sctp_clear_cachedkeys(stcb, keyid);
1272 		SCTP_TCB_UNLOCK(stcb);
1273 	}
1274 }
1275 
1276 /*
1277  * delete a shared key from an association ASSUMES TCB_LOCK is already held
1278  */
1279 int
1280 sctp_delete_sharedkey(struct sctp_tcb *stcb, uint16_t keyid)
1281 {
1282 	sctp_sharedkey_t *skey;
1283 
1284 	if (stcb == NULL)
1285 		return (-1);
1286 
1287 	/* is the keyid the assoc active sending key */
1288 	if (keyid == stcb->asoc.authinfo.assoc_keyid)
1289 		return (-1);
1290 
1291 	/* does the key exist? */
1292 	skey = sctp_find_sharedkey(&stcb->asoc.shared_keys, keyid);
1293 	if (skey == NULL)
1294 		return (-1);
1295 
1296 	/* remove it */
1297 	LIST_REMOVE(skey, next);
1298 	sctp_free_sharedkey(skey);	/* frees skey->key as well */
1299 
1300 	/* clear any cached keys */
1301 	sctp_clear_cachedkeys(stcb, keyid);
1302 	return (0);
1303 }
1304 
1305 /*
1306  * deletes a shared key from the endpoint ASSUMES INP_WLOCK is already held
1307  */
1308 int
1309 sctp_delete_sharedkey_ep(struct sctp_inpcb *inp, uint16_t keyid)
1310 {
1311 	sctp_sharedkey_t *skey;
1312 	struct sctp_tcb *stcb;
1313 
1314 	if (inp == NULL)
1315 		return (-1);
1316 
1317 	/* is the keyid the active sending key on the endpoint or any assoc */
1318 	if (keyid == inp->sctp_ep.default_keyid)
1319 		return (-1);
1320 	LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
1321 		SCTP_TCB_LOCK(stcb);
1322 		if (keyid == stcb->asoc.authinfo.assoc_keyid) {
1323 			SCTP_TCB_UNLOCK(stcb);
1324 			return (-1);
1325 		}
1326 		SCTP_TCB_UNLOCK(stcb);
1327 	}
1328 
1329 	/* does the key exist? */
1330 	skey = sctp_find_sharedkey(&inp->sctp_ep.shared_keys, keyid);
1331 	if (skey == NULL)
1332 		return (-1);
1333 
1334 	/* remove it */
1335 	LIST_REMOVE(skey, next);
1336 	sctp_free_sharedkey(skey);	/* frees skey->key as well */
1337 
1338 	/* clear any cached keys */
1339 	sctp_clear_cachedkeys_ep(inp, keyid);
1340 	return (0);
1341 }
1342 
1343 /*
1344  * set the active key on an association ASSUME TCB_LOCK is already held
1345  */
1346 int
1347 sctp_auth_setactivekey(struct sctp_tcb *stcb, uint16_t keyid)
1348 {
1349 	sctp_sharedkey_t *skey = NULL;
1350 	sctp_key_t *key = NULL;
1351 	int using_ep_key = 0;
1352 
1353 	/* find the key on the assoc */
1354 	skey = sctp_find_sharedkey(&stcb->asoc.shared_keys, keyid);
1355 	if (skey == NULL) {
1356 		/* if not on the assoc, find the key on the endpoint */
1357 		SCTP_INP_RLOCK(stcb->sctp_ep);
1358 		skey = sctp_find_sharedkey(&stcb->sctp_ep->sctp_ep.shared_keys,
1359 		    keyid);
1360 		using_ep_key = 1;
1361 	}
1362 	if (skey == NULL) {
1363 		/* that key doesn't exist */
1364 		if (using_ep_key)
1365 			SCTP_INP_RUNLOCK(stcb->sctp_ep);
1366 		return (-1);
1367 	}
1368 	/* get the shared key text */
1369 	key = skey->key;
1370 
1371 	/* free any existing cached key */
1372 	if (stcb->asoc.authinfo.assoc_key != NULL)
1373 		sctp_free_key(stcb->asoc.authinfo.assoc_key);
1374 	/* compute a new assoc key and cache it */
1375 	stcb->asoc.authinfo.assoc_key =
1376 	    sctp_compute_hashkey(stcb->asoc.authinfo.random,
1377 	    stcb->asoc.authinfo.peer_random, key);
1378 	stcb->asoc.authinfo.assoc_keyid = keyid;
1379 #ifdef SCTP_DEBUG
1380 	if (SCTP_AUTH_DEBUG)
1381 		sctp_print_key(stcb->asoc.authinfo.assoc_key, "Assoc Key");
1382 #endif
1383 
1384 	if (using_ep_key)
1385 		SCTP_INP_RUNLOCK(stcb->sctp_ep);
1386 	return (0);
1387 }
1388 
1389 /*
1390  * set the active key on an endpoint ASSUMES INP_WLOCK is already held
1391  */
1392 int
1393 sctp_auth_setactivekey_ep(struct sctp_inpcb *inp, uint16_t keyid)
1394 {
1395 	sctp_sharedkey_t *skey;
1396 
1397 	/* find the key */
1398 	skey = sctp_find_sharedkey(&inp->sctp_ep.shared_keys, keyid);
1399 	if (skey == NULL) {
1400 		/* that key doesn't exist */
1401 		return (-1);
1402 	}
1403 	inp->sctp_ep.default_keyid = keyid;
1404 	return (0);
1405 }
1406 
1407 /*
1408  * get local authentication parameters from cookie (from INIT-ACK)
1409  */
1410 void
1411 sctp_auth_get_cookie_params(struct sctp_tcb *stcb, struct mbuf *m,
1412     uint32_t offset, uint32_t length)
1413 {
1414 	struct sctp_paramhdr *phdr, tmp_param;
1415 	uint16_t plen, ptype;
1416 	uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
1417 	struct sctp_auth_random *random = NULL;
1418 	uint16_t random_len = 0;
1419 	uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
1420 	struct sctp_auth_hmac_algo *hmacs = NULL;
1421 	uint16_t hmacs_len = 0;
1422 	uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
1423 	struct sctp_auth_chunk_list *chunks = NULL;
1424 	uint16_t num_chunks = 0;
1425 	sctp_key_t *new_key;
1426 	uint32_t keylen;
1427 
1428 	/* convert to upper bound */
1429 	length += offset;
1430 
1431 	phdr = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
1432 	    sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
1433 	while (phdr != NULL) {
1434 		ptype = ntohs(phdr->param_type);
1435 		plen = ntohs(phdr->param_length);
1436 
1437 		if ((plen == 0) || (offset + plen > length))
1438 			break;
1439 
1440 		if (ptype == SCTP_RANDOM) {
1441 			if (plen > sizeof(random_store))
1442 				break;
1443 			phdr = sctp_get_next_param(m, offset,
1444 			    (struct sctp_paramhdr *)random_store, plen);
1445 			if (phdr == NULL)
1446 				return;
1447 			/* save the random and length for the key */
1448 			random = (struct sctp_auth_random *)phdr;
1449 			random_len = plen - sizeof(*random);
1450 		} else if (ptype == SCTP_HMAC_LIST) {
1451 			int num_hmacs;
1452 			int i;
1453 
1454 			if (plen > sizeof(hmacs_store))
1455 				break;
1456 			phdr = sctp_get_next_param(m, offset,
1457 			    (struct sctp_paramhdr *)hmacs_store, plen);
1458 			if (phdr == NULL)
1459 				return;
1460 			/* save the hmacs list and num for the key */
1461 			hmacs = (struct sctp_auth_hmac_algo *)phdr;
1462 			hmacs_len = plen - sizeof(*hmacs);
1463 			num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
1464 			if (stcb->asoc.local_hmacs != NULL)
1465 				sctp_free_hmaclist(stcb->asoc.local_hmacs);
1466 			stcb->asoc.local_hmacs = sctp_alloc_hmaclist(num_hmacs);
1467 			if (stcb->asoc.local_hmacs != NULL) {
1468 				for (i = 0; i < num_hmacs; i++) {
1469 					sctp_auth_add_hmacid(stcb->asoc.local_hmacs,
1470 					    ntohs(hmacs->hmac_ids[i]));
1471 				}
1472 			}
1473 		} else if (ptype == SCTP_CHUNK_LIST) {
1474 			int i;
1475 
1476 			if (plen > sizeof(chunks_store))
1477 				break;
1478 			phdr = sctp_get_next_param(m, offset,
1479 			    (struct sctp_paramhdr *)chunks_store, plen);
1480 			if (phdr == NULL)
1481 				return;
1482 			chunks = (struct sctp_auth_chunk_list *)phdr;
1483 			num_chunks = plen - sizeof(*chunks);
1484 			/* save chunks list and num for the key */
1485 			if (stcb->asoc.local_auth_chunks != NULL)
1486 				sctp_clear_chunklist(stcb->asoc.local_auth_chunks);
1487 			else
1488 				stcb->asoc.local_auth_chunks = sctp_alloc_chunklist();
1489 			for (i = 0; i < num_chunks; i++) {
1490 				sctp_auth_add_chunk(chunks->chunk_types[i],
1491 				    stcb->asoc.local_auth_chunks);
1492 			}
1493 		}
1494 		/* get next parameter */
1495 		offset += SCTP_SIZE32(plen);
1496 		if (offset + sizeof(struct sctp_paramhdr) > length)
1497 			break;
1498 		phdr = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
1499 		    (uint8_t *) & tmp_param);
1500 	}
1501 	/* concatenate the full random key */
1502 #ifdef SCTP_AUTH_DRAFT_04
1503 	keylen = random_len;
1504 	new_key = sctp_alloc_key(keylen);
1505 	if (new_key != NULL) {
1506 		/* copy in the RANDOM */
1507 		if (random != NULL)
1508 			bcopy(random->random_data, new_key->key, random_len);
1509 	}
1510 #else
1511 	keylen = sizeof(*random) + random_len + sizeof(*chunks) + num_chunks +
1512 	    sizeof(*hmacs) + hmacs_len;
1513 	new_key = sctp_alloc_key(keylen);
1514 	if (new_key != NULL) {
1515 		/* copy in the RANDOM */
1516 		if (random != NULL) {
1517 			keylen = sizeof(*random) + random_len;
1518 			bcopy(random, new_key->key, keylen);
1519 		}
1520 		/* append in the AUTH chunks */
1521 		if (chunks != NULL) {
1522 			bcopy(chunks, new_key->key + keylen,
1523 			    sizeof(*chunks) + num_chunks);
1524 			keylen += sizeof(*chunks) + num_chunks;
1525 		}
1526 		/* append in the HMACs */
1527 		if (hmacs != NULL) {
1528 			bcopy(hmacs, new_key->key + keylen,
1529 			    sizeof(*hmacs) + hmacs_len);
1530 		}
1531 	}
1532 #endif
1533 	if (stcb->asoc.authinfo.random != NULL)
1534 		sctp_free_key(stcb->asoc.authinfo.random);
1535 	stcb->asoc.authinfo.random = new_key;
1536 	stcb->asoc.authinfo.random_len = random_len;
1537 #ifdef SCTP_AUTH_DRAFT_04
1538 	/* don't include the chunks and hmacs for draft -04 */
1539 	stcb->asoc.authinfo.random->keylen = random_len;
1540 #endif
1541 	sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
1542 	sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
1543 
1544 	/* negotiate what HMAC to use for the peer */
1545 	stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
1546 	    stcb->asoc.local_hmacs);
1547 	/* copy defaults from the endpoint */
1548 	/* FIX ME: put in cookie? */
1549 	stcb->asoc.authinfo.assoc_keyid = stcb->sctp_ep->sctp_ep.default_keyid;
1550 }
1551 
1552 /*
1553  * compute and fill in the HMAC digest for a packet
1554  */
1555 void
1556 sctp_fill_hmac_digest_m(struct mbuf *m, uint32_t auth_offset,
1557     struct sctp_auth_chunk *auth, struct sctp_tcb *stcb)
1558 {
1559 	uint32_t digestlen;
1560 	sctp_sharedkey_t *skey;
1561 	sctp_key_t *key;
1562 
1563 	if ((stcb == NULL) || (auth == NULL))
1564 		return;
1565 
1566 	/* zero the digest + chunk padding */
1567 	digestlen = sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
1568 	bzero(auth->hmac, SCTP_SIZE32(digestlen));
1569 	/* is an assoc key cached? */
1570 	if (stcb->asoc.authinfo.assoc_key == NULL) {
1571 		skey = sctp_find_sharedkey(&stcb->asoc.shared_keys,
1572 		    stcb->asoc.authinfo.assoc_keyid);
1573 		if (skey == NULL) {
1574 			/* not in the assoc list, so check the endpoint list */
1575 			skey = sctp_find_sharedkey(&stcb->sctp_ep->sctp_ep.shared_keys,
1576 			    stcb->asoc.authinfo.assoc_keyid);
1577 		}
1578 		/* the only way skey is NULL is if null key id 0 is used */
1579 		if (skey != NULL)
1580 			key = skey->key;
1581 		else
1582 			key = NULL;
1583 		/* compute a new assoc key and cache it */
1584 		stcb->asoc.authinfo.assoc_key =
1585 		    sctp_compute_hashkey(stcb->asoc.authinfo.random,
1586 		    stcb->asoc.authinfo.peer_random, key);
1587 #ifdef SCTP_DEBUG
1588 		if (SCTP_AUTH_DEBUG) {
1589 			printf("caching key id %u\n",
1590 			    stcb->asoc.authinfo.assoc_keyid);
1591 			sctp_print_key(stcb->asoc.authinfo.assoc_key, "Assoc Key");
1592 		}
1593 #endif
1594 	}
1595 	/* set in the active key id */
1596 	auth->shared_key_id = htons(stcb->asoc.authinfo.assoc_keyid);
1597 
1598 	/* compute and fill in the digest */
1599 	(void)sctp_compute_hmac_m(stcb->asoc.peer_hmac_id,
1600 	    stcb->asoc.authinfo.assoc_key,
1601 	    m, auth_offset, auth->hmac);
1602 }
1603 
1604 
1605 static void
1606 sctp_bzero_m(struct mbuf *m, uint32_t m_offset, uint32_t size)
1607 {
1608 	struct mbuf *m_tmp;
1609 	uint8_t *data;
1610 
1611 	/* sanity check */
1612 	if (m == NULL)
1613 		return;
1614 
1615 	/* find the correct starting mbuf and offset (get start position) */
1616 	m_tmp = m;
1617 	while ((m_tmp != NULL) && (m_offset >= (uint32_t) SCTP_BUF_LEN(m_tmp))) {
1618 		m_offset -= SCTP_BUF_LEN(m_tmp);
1619 		m_tmp = SCTP_BUF_NEXT(m_tmp);
1620 	}
1621 	/* now use the rest of the mbuf chain */
1622 	while ((m_tmp != NULL) && (size > 0)) {
1623 		data = mtod(m_tmp, uint8_t *) + m_offset;
1624 		if (size > (uint32_t) SCTP_BUF_LEN(m_tmp)) {
1625 			bzero(data, SCTP_BUF_LEN(m_tmp));
1626 			size -= SCTP_BUF_LEN(m_tmp);
1627 		} else {
1628 			bzero(data, size);
1629 			size = 0;
1630 		}
1631 		/* clear the offset since it's only for the first mbuf */
1632 		m_offset = 0;
1633 		m_tmp = SCTP_BUF_NEXT(m_tmp);
1634 	}
1635 }
1636 
1637 /*
1638  * process the incoming Authentication chunk return codes: -1 on any
1639  * authentication error 0 on authentication verification
1640  */
1641 int
1642 sctp_handle_auth(struct sctp_tcb *stcb, struct sctp_auth_chunk *auth,
1643     struct mbuf *m, uint32_t offset)
1644 {
1645 	uint16_t chunklen;
1646 	uint16_t shared_key_id;
1647 	uint16_t hmac_id;
1648 	sctp_sharedkey_t *skey;
1649 	uint32_t digestlen;
1650 	uint8_t digest[SCTP_AUTH_DIGEST_LEN_MAX];
1651 	uint8_t computed_digest[SCTP_AUTH_DIGEST_LEN_MAX];
1652 
1653 	/* auth is checked for NULL by caller */
1654 	chunklen = ntohs(auth->ch.chunk_length);
1655 	if (chunklen < sizeof(*auth)) {
1656 		SCTP_STAT_INCR(sctps_recvauthfailed);
1657 		return (-1);
1658 	}
1659 	SCTP_STAT_INCR(sctps_recvauth);
1660 
1661 	/* get the auth params */
1662 	shared_key_id = ntohs(auth->shared_key_id);
1663 	hmac_id = ntohs(auth->hmac_id);
1664 #ifdef SCTP_DEBUG
1665 	if (SCTP_AUTH_DEBUG)
1666 		printf("SCTP AUTH Chunk: shared key %u, HMAC id %u\n",
1667 		    shared_key_id, hmac_id);
1668 #endif
1669 
1670 	/* is the indicated HMAC supported? */
1671 	if (!sctp_auth_is_supported_hmac(stcb->asoc.local_hmacs, hmac_id)) {
1672 		struct mbuf *m_err;
1673 		struct sctp_auth_invalid_hmac *err;
1674 
1675 		SCTP_STAT_INCR(sctps_recvivalhmacid);
1676 #ifdef SCTP_DEBUG
1677 		if (SCTP_AUTH_DEBUG)
1678 			printf("SCTP Auth: unsupported HMAC id %u\n", hmac_id);
1679 #endif
1680 		/*
1681 		 * report this in an Error Chunk: Unsupported HMAC
1682 		 * Identifier
1683 		 */
1684 		m_err = sctp_get_mbuf_for_msg(sizeof(*err), 0, M_DONTWAIT, 1, MT_HEADER);
1685 		if (m_err != NULL) {
1686 			/* pre-reserve some space */
1687 			SCTP_BUF_RESV_UF(m_err, sizeof(struct sctp_chunkhdr));
1688 			/* fill in the error */
1689 			err = mtod(m_err, struct sctp_auth_invalid_hmac *);
1690 			bzero(err, sizeof(*err));
1691 			err->ph.param_type = htons(SCTP_CAUSE_UNSUPPORTED_HMACID);
1692 			err->ph.param_length = htons(sizeof(*err));
1693 			err->hmac_id = ntohs(hmac_id);
1694 			SCTP_BUF_LEN(m_err) = sizeof(*err);
1695 			/* queue it */
1696 			sctp_queue_op_err(stcb, m_err);
1697 		}
1698 		return (-1);
1699 	}
1700 	/* get the indicated shared key, if available */
1701 	if ((stcb->asoc.authinfo.recv_key == NULL) ||
1702 	    (stcb->asoc.authinfo.recv_keyid != shared_key_id)) {
1703 		/* find the shared key on the assoc first */
1704 		skey = sctp_find_sharedkey(&stcb->asoc.shared_keys, shared_key_id);
1705 		if (skey == NULL) {
1706 			/* if not on the assoc, find it on the endpoint */
1707 			skey = sctp_find_sharedkey(&stcb->sctp_ep->sctp_ep.shared_keys,
1708 			    shared_key_id);
1709 		}
1710 		/* if the shared key isn't found, discard the chunk */
1711 		if (skey == NULL) {
1712 			SCTP_STAT_INCR(sctps_recvivalkeyid);
1713 #ifdef SCTP_DEBUG
1714 			if (SCTP_AUTH_DEBUG)
1715 				printf("SCTP Auth: unknown key id %u\n",
1716 				    shared_key_id);
1717 #endif
1718 			return (-1);
1719 		}
1720 		/* generate a notification if this is a new key id */
1721 		if (stcb->asoc.authinfo.recv_keyid != shared_key_id)
1722 			/*
1723 			 * sctp_ulp_notify(SCTP_NOTIFY_AUTH_NEW_KEY, stcb,
1724 			 * shared_key_id, (void
1725 			 * *)stcb->asoc.authinfo.recv_keyid);
1726 			 */
1727 			sctp_notify_authentication(stcb, SCTP_AUTH_NEWKEY,
1728 			    shared_key_id, stcb->asoc.authinfo.recv_keyid);
1729 		/* compute a new recv assoc key and cache it */
1730 		if (stcb->asoc.authinfo.recv_key != NULL)
1731 			sctp_free_key(stcb->asoc.authinfo.recv_key);
1732 		stcb->asoc.authinfo.recv_key =
1733 		    sctp_compute_hashkey(stcb->asoc.authinfo.random,
1734 		    stcb->asoc.authinfo.peer_random, skey->key);
1735 		stcb->asoc.authinfo.recv_keyid = shared_key_id;
1736 #ifdef SCTP_DEBUG
1737 		if (SCTP_AUTH_DEBUG)
1738 			sctp_print_key(stcb->asoc.authinfo.recv_key, "Recv Key");
1739 #endif
1740 	}
1741 	/* validate the digest length */
1742 	digestlen = sctp_get_hmac_digest_len(hmac_id);
1743 	if (chunklen < (sizeof(*auth) + digestlen)) {
1744 		/* invalid digest length */
1745 		SCTP_STAT_INCR(sctps_recvauthfailed);
1746 #ifdef SCTP_DEBUG
1747 		if (SCTP_AUTH_DEBUG)
1748 			printf("SCTP Auth: chunk too short for HMAC\n");
1749 #endif
1750 		return (-1);
1751 	}
1752 	/* save a copy of the digest, zero the pseudo header, and validate */
1753 	bcopy(auth->hmac, digest, digestlen);
1754 	sctp_bzero_m(m, offset + sizeof(*auth), SCTP_SIZE32(digestlen));
1755 	(void)sctp_compute_hmac_m(hmac_id, stcb->asoc.authinfo.recv_key,
1756 	    m, offset, computed_digest);
1757 
1758 	/* compare the computed digest with the one in the AUTH chunk */
1759 	if (memcmp(digest, computed_digest, digestlen) != 0) {
1760 		SCTP_STAT_INCR(sctps_recvauthfailed);
1761 #ifdef SCTP_DEBUG
1762 		if (SCTP_AUTH_DEBUG)
1763 			printf("SCTP Auth: HMAC digest check failed\n");
1764 #endif
1765 		return (-1);
1766 	}
1767 	return (0);
1768 }
1769 
1770 /*
1771  * Generate NOTIFICATION
1772  */
1773 void
1774 sctp_notify_authentication(struct sctp_tcb *stcb, uint32_t indication,
1775     uint16_t keyid, uint16_t alt_keyid)
1776 {
1777 	struct mbuf *m_notify;
1778 	struct sctp_authkey_event *auth;
1779 	struct sctp_queued_to_read *control;
1780 
1781 	if (sctp_is_feature_off(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTHEVNT))
1782 		/* event not enabled */
1783 		return;
1784 
1785 	m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_authkey_event),
1786 	    0, M_DONTWAIT, 1, MT_HEADER);
1787 	if (m_notify == NULL)
1788 		/* no space left */
1789 		return;
1790 
1791 	SCTP_BUF_LEN(m_notify) = 0;
1792 	auth = mtod(m_notify, struct sctp_authkey_event *);
1793 	auth->auth_type = SCTP_AUTHENTICATION_EVENT;
1794 	auth->auth_flags = 0;
1795 	auth->auth_length = sizeof(*auth);
1796 	auth->auth_keynumber = keyid;
1797 	auth->auth_altkeynumber = alt_keyid;
1798 	auth->auth_indication = indication;
1799 	auth->auth_assoc_id = sctp_get_associd(stcb);
1800 
1801 	SCTP_BUF_LEN(m_notify) = sizeof(*auth);
1802 	SCTP_BUF_NEXT(m_notify) = NULL;
1803 
1804 	/* append to socket */
1805 	control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
1806 	    0, 0, 0, 0, 0, 0, m_notify);
1807 	if (control == NULL) {
1808 		/* no memory */
1809 		sctp_m_freem(m_notify);
1810 		return;
1811 	}
1812 	control->spec_flags = M_NOTIFICATION;
1813 	control->length = SCTP_BUF_LEN(m_notify);
1814 	/* not that we need this */
1815 	control->tail_mbuf = m_notify;
1816 	sctp_add_to_readq(stcb->sctp_ep, stcb, control,
1817 	    &stcb->sctp_socket->so_rcv, 1);
1818 }
1819 
1820 
1821 /*
1822  * validates the AUTHentication related parameters in an INIT/INIT-ACK
1823  * Note: currently only used for INIT as INIT-ACK is handled inline
1824  * with sctp_load_addresses_from_init()
1825  */
1826 int
1827 sctp_validate_init_auth_params(struct mbuf *m, int offset, int limit)
1828 {
1829 	struct sctp_paramhdr *phdr, parm_buf;
1830 	uint16_t ptype, plen;
1831 	int peer_supports_asconf = 0;
1832 	int peer_supports_auth = 0;
1833 	int got_random = 0, got_hmacs = 0;
1834 
1835 	/* go through each of the params. */
1836 	phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
1837 	while (phdr) {
1838 		ptype = ntohs(phdr->param_type);
1839 		plen = ntohs(phdr->param_length);
1840 
1841 		if (offset + plen > limit) {
1842 			break;
1843 		}
1844 		if (plen == 0) {
1845 			break;
1846 		}
1847 		if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
1848 			/* A supported extension chunk */
1849 			struct sctp_supported_chunk_types_param *pr_supported;
1850 			uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
1851 			int num_ent, i;
1852 
1853 			phdr = sctp_get_next_param(m, offset,
1854 			    (struct sctp_paramhdr *)&local_store, plen);
1855 			if (phdr == NULL) {
1856 				return (-1);
1857 			}
1858 			pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
1859 			num_ent = plen - sizeof(struct sctp_paramhdr);
1860 			for (i = 0; i < num_ent; i++) {
1861 				switch (pr_supported->chunk_types[i]) {
1862 				case SCTP_ASCONF:
1863 				case SCTP_ASCONF_ACK:
1864 					peer_supports_asconf = 1;
1865 					break;
1866 				case SCTP_AUTHENTICATION:
1867 					peer_supports_auth = 1;
1868 					break;
1869 				default:
1870 					/* one we don't care about */
1871 					break;
1872 				}
1873 			}
1874 		} else if (ptype == SCTP_RANDOM) {
1875 			got_random = 1;
1876 			/* enforce the random length */
1877 			if (plen != (sizeof(struct sctp_auth_random) +
1878 			    SCTP_AUTH_RANDOM_SIZE_REQUIRED)) {
1879 #ifdef SCTP_DEBUG
1880 				if (sctp_debug_on & SCTP_DEBUG_AUTH1)
1881 					printf("SCTP: invalid RANDOM len\n");
1882 #endif
1883 				return (-1);
1884 			}
1885 		} else if (ptype == SCTP_HMAC_LIST) {
1886 			uint8_t store[SCTP_PARAM_BUFFER_SIZE];
1887 			struct sctp_auth_hmac_algo *hmacs;
1888 			int num_hmacs;
1889 
1890 			if (plen > sizeof(store))
1891 				break;
1892 			phdr = sctp_get_next_param(m, offset,
1893 			    (struct sctp_paramhdr *)store, plen);
1894 			if (phdr == NULL)
1895 				return (-1);
1896 			hmacs = (struct sctp_auth_hmac_algo *)phdr;
1897 			num_hmacs = (plen - sizeof(*hmacs)) /
1898 			    sizeof(hmacs->hmac_ids[0]);
1899 			/* validate the hmac list */
1900 			if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
1901 #ifdef SCTP_DEBUG
1902 				if (sctp_debug_on & SCTP_DEBUG_AUTH1)
1903 					printf("SCTP: invalid HMAC param\n");
1904 #endif
1905 				return (-1);
1906 			}
1907 			got_hmacs = 1;
1908 		}
1909 		offset += SCTP_SIZE32(plen);
1910 		if (offset >= limit) {
1911 			break;
1912 		}
1913 		phdr = sctp_get_next_param(m, offset, &parm_buf,
1914 		    sizeof(parm_buf));
1915 	}
1916 	/* validate authentication required parameters */
1917 	if (got_random && got_hmacs) {
1918 		peer_supports_auth = 1;
1919 	} else {
1920 		peer_supports_auth = 0;
1921 	}
1922 	if (!sctp_asconf_auth_nochk && peer_supports_asconf &&
1923 	    !peer_supports_auth) {
1924 #ifdef SCTP_DEBUG
1925 		if (sctp_debug_on & SCTP_DEBUG_AUTH1)
1926 			printf("SCTP: peer supports ASCONF but not AUTH\n");
1927 #endif
1928 		return (-1);
1929 	}
1930 	return (0);
1931 }
1932 
1933 void
1934 sctp_initialize_auth_params(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
1935 {
1936 	uint16_t chunks_len = 0;
1937 	uint16_t hmacs_len = 0;
1938 	uint16_t random_len = sctp_auth_random_len;
1939 	sctp_key_t *new_key;
1940 	uint16_t keylen;
1941 
1942 	/* initialize hmac list from endpoint */
1943 	stcb->asoc.local_hmacs = sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
1944 	if (stcb->asoc.local_hmacs != NULL) {
1945 		hmacs_len = stcb->asoc.local_hmacs->num_algo *
1946 		    sizeof(stcb->asoc.local_hmacs->hmac[0]);
1947 	}
1948 	/* initialize auth chunks list from endpoint */
1949 	stcb->asoc.local_auth_chunks =
1950 	    sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
1951 	if (stcb->asoc.local_auth_chunks != NULL) {
1952 		int i;
1953 
1954 		for (i = 0; i < 256; i++) {
1955 			if (stcb->asoc.local_auth_chunks->chunks[i])
1956 				chunks_len++;
1957 		}
1958 	}
1959 	/* copy defaults from the endpoint */
1960 	stcb->asoc.authinfo.assoc_keyid = inp->sctp_ep.default_keyid;
1961 
1962 	/* now set the concatenated key (random + chunks + hmacs) */
1963 #ifdef SCTP_AUTH_DRAFT_04
1964 	/* don't include the chunks and hmacs for draft -04 */
1965 	keylen = random_len;
1966 	new_key = sctp_generate_random_key(keylen);
1967 #else
1968 	/* key includes parameter headers */
1969 	keylen = (3 * sizeof(struct sctp_paramhdr)) + random_len + chunks_len +
1970 	    hmacs_len;
1971 	new_key = sctp_alloc_key(keylen);
1972 	if (new_key != NULL) {
1973 		struct sctp_paramhdr *ph;
1974 		int plen;
1975 
1976 		/* generate and copy in the RANDOM */
1977 		ph = (struct sctp_paramhdr *)new_key->key;
1978 		ph->param_type = htons(SCTP_RANDOM);
1979 		plen = sizeof(*ph) + random_len;
1980 		ph->param_length = htons(plen);
1981 		SCTP_READ_RANDOM(new_key->key + sizeof(*ph), random_len);
1982 		keylen = plen;
1983 
1984 		/* append in the AUTH chunks */
1985 		/* NOTE: currently we always have chunks to list */
1986 		ph = (struct sctp_paramhdr *)(new_key->key + keylen);
1987 		ph->param_type = htons(SCTP_CHUNK_LIST);
1988 		plen = sizeof(*ph) + chunks_len;
1989 		ph->param_length = htons(plen);
1990 		keylen += sizeof(*ph);
1991 		if (stcb->asoc.local_auth_chunks) {
1992 			int i;
1993 
1994 			for (i = 0; i < 256; i++) {
1995 				if (stcb->asoc.local_auth_chunks->chunks[i])
1996 					new_key->key[keylen++] = i;
1997 			}
1998 		}
1999 		/* append in the HMACs */
2000 		ph = (struct sctp_paramhdr *)(new_key->key + keylen);
2001 		ph->param_type = htons(SCTP_HMAC_LIST);
2002 		plen = sizeof(*ph) + hmacs_len;
2003 		ph->param_length = htons(plen);
2004 		keylen += sizeof(*ph);
2005 		sctp_serialize_hmaclist(stcb->asoc.local_hmacs,
2006 		    new_key->key + keylen);
2007 	}
2008 #endif
2009 	if (stcb->asoc.authinfo.random != NULL)
2010 		sctp_free_key(stcb->asoc.authinfo.random);
2011 	stcb->asoc.authinfo.random = new_key;
2012 	stcb->asoc.authinfo.random_len = random_len;
2013 }
2014 
2015 
2016 #ifdef SCTP_HMAC_TEST
2017 /*
2018  * HMAC and key concatenation tests
2019  */
2020 static void
2021 sctp_print_digest(uint8_t * digest, uint32_t digestlen, const char *str)
2022 {
2023 	uint32_t i;
2024 
2025 	printf("\n%s: 0x", str);
2026 	if (digest == NULL)
2027 		return;
2028 
2029 	for (i = 0; i < digestlen; i++)
2030 		printf("%02x", digest[i]);
2031 }
2032 
2033 static int
2034 sctp_test_hmac(const char *str, uint16_t hmac_id, uint8_t * key,
2035     uint32_t keylen, uint8_t * text, uint32_t textlen,
2036     uint8_t * digest, uint32_t digestlen)
2037 {
2038 	uint8_t computed_digest[SCTP_AUTH_DIGEST_LEN_MAX];
2039 
2040 	printf("\n%s:", str);
2041 	sctp_hmac(hmac_id, key, keylen, text, textlen, computed_digest);
2042 	sctp_print_digest(digest, digestlen, "Expected digest");
2043 	sctp_print_digest(computed_digest, digestlen, "Computed digest");
2044 	if (memcmp(digest, computed_digest, digestlen) != 0) {
2045 		printf("\nFAILED");
2046 		return (-1);
2047 	} else {
2048 		printf("\nPASSED");
2049 		return (0);
2050 	}
2051 }
2052 
2053 
2054 /*
2055  * RFC 2202: HMAC-SHA1 test cases
2056  */
2057 void
2058 sctp_test_hmac_sha1(void)
2059 {
2060 	uint8_t *digest;
2061 	uint8_t key[128];
2062 	uint32_t keylen;
2063 	uint8_t text[128];
2064 	uint32_t textlen;
2065 	uint32_t digestlen = 20;
2066 	int failed = 0;
2067 
2068 	/*
2069 	 * test_case =     1 key =
2070 	 * 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b key_len =       20
2071 	 * data =          "Hi There" data_len =      8 digest =
2072 	 * 0xb617318655057264e28bc0b6fb378c8ef146be00
2073 	 */
2074 	keylen = 20;
2075 	memset(key, 0x0b, keylen);
2076 	textlen = 8;
2077 	strcpy(text, "Hi There");
2078 	digest = "\xb6\x17\x31\x86\x55\x05\x72\x64\xe2\x8b\xc0\xb6\xfb\x37\x8c\x8e\xf1\x46\xbe\x00";
2079 	if (sctp_test_hmac("SHA1 test case 1", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
2080 	    text, textlen, digest, digestlen) < 0)
2081 		failed++;
2082 
2083 	/*
2084 	 * test_case =     2 key =           "Jefe" key_len =       4 data =
2085 	 * "what do ya want for nothing?" data_len =      28 digest =
2086 	 * 0xeffcdf6ae5eb2fa2d27416d5f184df9c259a7c79
2087 	 */
2088 	keylen = 4;
2089 	strcpy(key, "Jefe");
2090 	textlen = 28;
2091 	strcpy(text, "what do ya want for nothing?");
2092 	digest = "\xef\xfc\xdf\x6a\xe5\xeb\x2f\xa2\xd2\x74\x16\xd5\xf1\x84\xdf\x9c\x25\x9a\x7c\x79";
2093 	if (sctp_test_hmac("SHA1 test case 2", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
2094 	    text, textlen, digest, digestlen) < 0)
2095 		failed++;
2096 
2097 	/*
2098 	 * test_case =     3 key =
2099 	 * 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa key_len =       20
2100 	 * data =          0xdd repeated 50 times data_len =      50 digest
2101 	 * = 0x125d7342b9ac11cd91a39af48aa17b4f63f175d3
2102 	 */
2103 	keylen = 20;
2104 	memset(key, 0xaa, keylen);
2105 	textlen = 50;
2106 	memset(text, 0xdd, textlen);
2107 	digest = "\x12\x5d\x73\x42\xb9\xac\x11\xcd\x91\xa3\x9a\xf4\x8a\xa1\x7b\x4f\x63\xf1\x75\xd3";
2108 	if (sctp_test_hmac("SHA1 test case 3", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
2109 	    text, textlen, digest, digestlen) < 0)
2110 		failed++;
2111 
2112 	/*
2113 	 * test_case =     4 key =
2114 	 * 0x0102030405060708090a0b0c0d0e0f10111213141516171819 key_len = 25
2115 	 * data =          0xcd repeated 50 times data_len =      50 digest
2116 	 * =        0x4c9007f4026250c6bc8414f9bf50c86c2d7235da
2117 	 */
2118 	keylen = 25;
2119 	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);
2120 	textlen = 50;
2121 	memset(text, 0xcd, textlen);
2122 	digest = "\x4c\x90\x07\xf4\x02\x62\x50\xc6\xbc\x84\x14\xf9\xbf\x50\xc8\x6c\x2d\x72\x35\xda";
2123 	if (sctp_test_hmac("SHA1 test case 4", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
2124 	    text, textlen, digest, digestlen) < 0)
2125 		failed++;
2126 
2127 	/*
2128 	 * test_case =     5 key =
2129 	 * 0x0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c key_len =       20
2130 	 * data =          "Test With Truncation" data_len =      20 digest
2131 	 * = 0x4c1a03424b55e07fe7f27be1d58bb9324a9a5a04 digest-96 =
2132 	 * 0x4c1a03424b55e07fe7f27be1
2133 	 */
2134 	keylen = 20;
2135 	memset(key, 0x0c, keylen);
2136 	textlen = 20;
2137 	strcpy(text, "Test With Truncation");
2138 	digest = "\x4c\x1a\x03\x42\x4b\x55\xe0\x7f\xe7\xf2\x7b\xe1\xd5\x8b\xb9\x32\x4a\x9a\x5a\x04";
2139 	if (sctp_test_hmac("SHA1 test case 5", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
2140 	    text, textlen, digest, digestlen) < 0)
2141 		failed++;
2142 
2143 	/*
2144 	 * test_case =     6 key =           0xaa repeated 80 times key_len
2145 	 * = 80 data =          "Test Using Larger Than Block-Size Key -
2146 	 * Hash Key First" data_len =      54 digest =
2147 	 * 0xaa4ae5e15272d00e95705637ce8a3b55ed402112
2148 	 */
2149 	keylen = 80;
2150 	memset(key, 0xaa, keylen);
2151 	textlen = 54;
2152 	strcpy(text, "Test Using Larger Than Block-Size Key - Hash Key First");
2153 	digest = "\xaa\x4a\xe5\xe1\x52\x72\xd0\x0e\x95\x70\x56\x37\xce\x8a\x3b\x55\xed\x40\x21\x12";
2154 	if (sctp_test_hmac("SHA1 test case 6", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
2155 	    text, textlen, digest, digestlen) < 0)
2156 		failed++;
2157 
2158 	/*
2159 	 * test_case =     7 key =           0xaa repeated 80 times key_len
2160 	 * = 80 data =          "Test Using Larger Than Block-Size Key and
2161 	 * Larger Than One Block-Size Data" data_len =      73 digest =
2162 	 * 0xe8e99d0f45237d786d6bbaa7965c7808bbff1a91
2163 	 */
2164 	keylen = 80;
2165 	memset(key, 0xaa, keylen);
2166 	textlen = 73;
2167 	strcpy(text, "Test Using Larger Than Block-Size Key and Larger Than One Block-Size Data");
2168 	digest = "\xe8\xe9\x9d\x0f\x45\x23\x7d\x78\x6d\x6b\xba\xa7\x96\x5c\x78\x08\xbb\xff\x1a\x91";
2169 	if (sctp_test_hmac("SHA1 test case 7", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
2170 	    text, textlen, digest, digestlen) < 0)
2171 		failed++;
2172 
2173 	/* done with all tests */
2174 	if (failed)
2175 		printf("\nSHA1 test results: %d cases failed", failed);
2176 	else
2177 		printf("\nSHA1 test results: all test cases passed");
2178 }
2179 
2180 /*
2181  * RFC 2202: HMAC-MD5 test cases
2182  */
2183 void
2184 sctp_test_hmac_md5(void)
2185 {
2186 	uint8_t *digest;
2187 	uint8_t key[128];
2188 	uint32_t keylen;
2189 	uint8_t text[128];
2190 	uint32_t textlen;
2191 	uint32_t digestlen = 16;
2192 	int failed = 0;
2193 
2194 	/*
2195 	 * test_case =     1 key = 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b
2196 	 * key_len =       16 data = "Hi There" data_len =      8 digest =
2197 	 * 0x9294727a3638bb1c13f48ef8158bfc9d
2198 	 */
2199 	keylen = 16;
2200 	memset(key, 0x0b, keylen);
2201 	textlen = 8;
2202 	strcpy(text, "Hi There");
2203 	digest = "\x92\x94\x72\x7a\x36\x38\xbb\x1c\x13\xf4\x8e\xf8\x15\x8b\xfc\x9d";
2204 	if (sctp_test_hmac("MD5 test case 1", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
2205 	    text, textlen, digest, digestlen) < 0)
2206 		failed++;
2207 
2208 	/*
2209 	 * test_case =     2 key =           "Jefe" key_len =       4 data =
2210 	 * "what do ya want for nothing?" data_len =      28 digest =
2211 	 * 0x750c783e6ab0b503eaa86e310a5db738
2212 	 */
2213 	keylen = 4;
2214 	strcpy(key, "Jefe");
2215 	textlen = 28;
2216 	strcpy(text, "what do ya want for nothing?");
2217 	digest = "\x75\x0c\x78\x3e\x6a\xb0\xb5\x03\xea\xa8\x6e\x31\x0a\x5d\xb7\x38";
2218 	if (sctp_test_hmac("MD5 test case 2", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
2219 	    text, textlen, digest, digestlen) < 0)
2220 		failed++;
2221 
2222 	/*
2223 	 * test_case =     3 key = 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
2224 	 * key_len =       16 data = 0xdd repeated 50 times data_len = 50
2225 	 * digest = 0x56be34521d144c88dbb8c733f0e8b3f6
2226 	 */
2227 	keylen = 16;
2228 	memset(key, 0xaa, keylen);
2229 	textlen = 50;
2230 	memset(text, 0xdd, textlen);
2231 	digest = "\x56\xbe\x34\x52\x1d\x14\x4c\x88\xdb\xb8\xc7\x33\xf0\xe8\xb3\xf6";
2232 	if (sctp_test_hmac("MD5 test case 3", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
2233 	    text, textlen, digest, digestlen) < 0)
2234 		failed++;
2235 
2236 	/*
2237 	 * test_case =     4 key =
2238 	 * 0x0102030405060708090a0b0c0d0e0f10111213141516171819 key_len = 25
2239 	 * data =          0xcd repeated 50 times data_len =      50 digest
2240 	 * =        0x697eaf0aca3a3aea3a75164746ffaa79
2241 	 */
2242 	keylen = 25;
2243 	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);
2244 	textlen = 50;
2245 	memset(text, 0xcd, textlen);
2246 	digest = "\x69\x7e\xaf\x0a\xca\x3a\x3a\xea\x3a\x75\x16\x47\x46\xff\xaa\x79";
2247 	if (sctp_test_hmac("MD5 test case 4", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
2248 	    text, textlen, digest, digestlen) < 0)
2249 		failed++;
2250 
2251 	/*
2252 	 * test_case =     5 key = 0x0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c
2253 	 * key_len =       16 data = "Test With Truncation" data_len = 20
2254 	 * digest = 0x56461ef2342edc00f9bab995690efd4c digest-96
2255 	 * 0x56461ef2342edc00f9bab995
2256 	 */
2257 	keylen = 16;
2258 	memset(key, 0x0c, keylen);
2259 	textlen = 20;
2260 	strcpy(text, "Test With Truncation");
2261 	digest = "\x56\x46\x1e\xf2\x34\x2e\xdc\x00\xf9\xba\xb9\x95\x69\x0e\xfd\x4c";
2262 	if (sctp_test_hmac("MD5 test case 5", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
2263 	    text, textlen, digest, digestlen) < 0)
2264 		failed++;
2265 
2266 	/*
2267 	 * test_case =     6 key =           0xaa repeated 80 times key_len
2268 	 * = 80 data =          "Test Using Larger Than Block-Size Key -
2269 	 * Hash Key First" data_len =      54 digest =
2270 	 * 0x6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd
2271 	 */
2272 	keylen = 80;
2273 	memset(key, 0xaa, keylen);
2274 	textlen = 54;
2275 	strcpy(text, "Test Using Larger Than Block-Size Key - Hash Key First");
2276 	digest = "\x6b\x1a\xb7\xfe\x4b\xd7\xbf\x8f\x0b\x62\xe6\xce\x61\xb9\xd0\xcd";
2277 	if (sctp_test_hmac("MD5 test case 6", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
2278 	    text, textlen, digest, digestlen) < 0)
2279 		failed++;
2280 
2281 	/*
2282 	 * test_case =     7 key =           0xaa repeated 80 times key_len
2283 	 * = 80 data =          "Test Using Larger Than Block-Size Key and
2284 	 * Larger Than One Block-Size Data" data_len =      73 digest =
2285 	 * 0x6f630fad67cda0ee1fb1f562db3aa53e
2286 	 */
2287 	keylen = 80;
2288 	memset(key, 0xaa, keylen);
2289 	textlen = 73;
2290 	strcpy(text, "Test Using Larger Than Block-Size Key and Larger Than One Block-Size Data");
2291 	digest = "\x6f\x63\x0f\xad\x67\xcd\xa0\xee\x1f\xb1\xf5\x62\xdb\x3a\xa5\x3e";
2292 	if (sctp_test_hmac("MD5 test case 7", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
2293 	    text, textlen, digest, digestlen) < 0)
2294 		failed++;
2295 
2296 	/* done with all tests */
2297 	if (failed)
2298 		printf("\nMD5 test results: %d cases failed", failed);
2299 	else
2300 		printf("\nMD5 test results: all test cases passed");
2301 }
2302 
2303 /*
2304  * test assoc key concatenation
2305  */
2306 static int
2307 sctp_test_key_concatenation(sctp_key_t * key1, sctp_key_t * key2,
2308     sctp_key_t * expected_key)
2309 {
2310 	sctp_key_t *key;
2311 	int ret_val;
2312 
2313 	sctp_show_key(key1, "\nkey1");
2314 	sctp_show_key(key2, "\nkey2");
2315 	key = sctp_compute_hashkey(key1, key2, NULL);
2316 	sctp_show_key(expected_key, "\nExpected");
2317 	sctp_show_key(key, "\nComputed");
2318 	if (memcmp(key, expected_key, expected_key->keylen) != 0) {
2319 		printf("\nFAILED");
2320 		ret_val = -1;
2321 	} else {
2322 		printf("\nPASSED");
2323 		ret_val = 0;
2324 	}
2325 	sctp_free_key(key1);
2326 	sctp_free_key(key2);
2327 	sctp_free_key(expected_key);
2328 	sctp_free_key(key);
2329 	return (ret_val);
2330 }
2331 
2332 
2333 void
2334 sctp_test_authkey(void)
2335 {
2336 	sctp_key_t *key1, *key2, *expected_key;
2337 	int failed = 0;
2338 
2339 	/* test case 1 */
2340 	key1 = sctp_set_key("\x01\x01\x01\x01", 4);
2341 	key2 = sctp_set_key("\x01\x02\x03\x04", 4);
2342 	expected_key = sctp_set_key("\x01\x01\x01\x01\x01\x02\x03\x04", 8);
2343 	if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2344 		failed++;
2345 
2346 	/* test case 2 */
2347 	key1 = sctp_set_key("\x00\x00\x00\x01", 4);
2348 	key2 = sctp_set_key("\x02", 1);
2349 	expected_key = sctp_set_key("\x00\x00\x00\x01\x02", 5);
2350 	if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2351 		failed++;
2352 
2353 	/* test case 3 */
2354 	key1 = sctp_set_key("\x01", 1);
2355 	key2 = sctp_set_key("\x00\x00\x00\x02", 4);
2356 	expected_key = sctp_set_key("\x01\x00\x00\x00\x02", 5);
2357 	if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2358 		failed++;
2359 
2360 	/* test case 4 */
2361 	key1 = sctp_set_key("\x00\x00\x00\x01", 4);
2362 	key2 = sctp_set_key("\x01", 1);
2363 	expected_key = sctp_set_key("\x01\x00\x00\x00\x01", 5);
2364 	if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2365 		failed++;
2366 
2367 	/* test case 5 */
2368 	key1 = sctp_set_key("\x01", 1);
2369 	key2 = sctp_set_key("\x00\x00\x00\x01", 4);
2370 	expected_key = sctp_set_key("\x01\x00\x00\x00\x01", 5);
2371 	if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2372 		failed++;
2373 
2374 	/* test case 6 */
2375 	key1 = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x07", 11);
2376 	key2 = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x08", 11);
2377 	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);
2378 	if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2379 		failed++;
2380 
2381 	/* test case 7 */
2382 	key1 = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x08", 11);
2383 	key2 = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x07", 11);
2384 	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);
2385 	if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
2386 		failed++;
2387 
2388 	/* done with all tests */
2389 	if (failed)
2390 		printf("\nKey concatenation test results: %d cases failed", failed);
2391 	else
2392 		printf("\nKey concatenation test results: all test cases passed");
2393 }
2394 
2395 
2396 #if defined(STANDALONE_HMAC_TEST)
2397 int
2398 main(void)
2399 {
2400 	sctp_test_hmac_sha1();
2401 	sctp_test_hmac_md5();
2402 	sctp_test_authkey();
2403 }
2404 
2405 #endif				/* STANDALONE_HMAC_TEST */
2406 
2407 #endif				/* SCTP_HMAC_TEST */
2408