The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netinet/sctp_auth.c

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    1 /*-
    2  * Copyright (c) 2001-2007, by 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/sctp_sysctl.h>
   40 #include <netinet/sctputil.h>
   41 #include <netinet/sctp_indata.h>
   42 #include <netinet/sctp_output.h>
   43 #include <netinet/sctp_auth.h>
   44 
   45 #ifdef SCTP_DEBUG
   46 #define SCTP_AUTH_DEBUG         (sctp_debug_on & SCTP_DEBUG_AUTH1)
   47 #define SCTP_AUTH_DEBUG2        (sctp_debug_on & SCTP_DEBUG_AUTH2)
   48 #endif                          /* SCTP_DEBUG */
   49 
   50 
   51 void
   52 sctp_clear_chunklist(sctp_auth_chklist_t * chklist)
   53 {
   54         bzero(chklist, sizeof(*chklist));
   55         /* chklist->num_chunks = 0; */
   56 }
   57 
   58 sctp_auth_chklist_t *
   59 sctp_alloc_chunklist(void)
   60 {
   61         sctp_auth_chklist_t *chklist;
   62 
   63         SCTP_MALLOC(chklist, sctp_auth_chklist_t *, sizeof(*chklist),
   64             SCTP_M_AUTH_CL);
   65         if (chklist == NULL) {
   66                 SCTPDBG(SCTP_DEBUG_AUTH1, "sctp_alloc_chunklist: failed to get memory!\n");
   67         } else {
   68                 sctp_clear_chunklist(chklist);
   69         }
   70         return (chklist);
   71 }
   72 
   73 void
   74 sctp_free_chunklist(sctp_auth_chklist_t * list)
   75 {
   76         if (list != NULL)
   77                 SCTP_FREE(list, SCTP_M_AUTH_CL);
   78 }
   79 
   80 sctp_auth_chklist_t *
   81 sctp_copy_chunklist(sctp_auth_chklist_t * list)
   82 {
   83         sctp_auth_chklist_t *new_list;
   84 
   85         if (list == NULL)
   86                 return (NULL);
   87 
   88         /* get a new list */
   89         new_list = sctp_alloc_chunklist();
   90         if (new_list == NULL)
   91                 return (NULL);
   92         /* copy it */
   93         bcopy(list, new_list, sizeof(*new_list));
   94 
   95         return (new_list);
   96 }
   97 
   98 
   99 /*
  100  * add a chunk to the required chunks list
  101  */
  102 int
  103 sctp_auth_add_chunk(uint8_t chunk, sctp_auth_chklist_t * list)
  104 {
  105         if (list == NULL)
  106                 return (-1);
  107 
  108         /* is chunk restricted? */
  109         if ((chunk == SCTP_INITIATION) ||
  110             (chunk == SCTP_INITIATION_ACK) ||
  111             (chunk == SCTP_SHUTDOWN_COMPLETE) ||
  112             (chunk == SCTP_AUTHENTICATION)) {
  113                 return (-1);
  114         }
  115         if (list->chunks[chunk] == 0) {
  116                 list->chunks[chunk] = 1;
  117                 list->num_chunks++;
  118                 SCTPDBG(SCTP_DEBUG_AUTH1,
  119                     "SCTP: added chunk %u (0x%02x) to Auth list\n",
  120                     chunk, chunk);
  121         }
  122         return (0);
  123 }
  124 
  125 /*
  126  * delete a chunk from the required chunks list
  127  */
  128 int
  129 sctp_auth_delete_chunk(uint8_t chunk, sctp_auth_chklist_t * list)
  130 {
  131         if (list == NULL)
  132                 return (-1);
  133 
  134         /* is chunk restricted? */
  135         if ((chunk == SCTP_ASCONF) ||
  136             (chunk == SCTP_ASCONF_ACK)) {
  137                 return (-1);
  138         }
  139         if (list->chunks[chunk] == 1) {
  140                 list->chunks[chunk] = 0;
  141                 list->num_chunks--;
  142                 SCTPDBG(SCTP_DEBUG_AUTH1,
  143                     "SCTP: deleted chunk %u (0x%02x) from Auth list\n",
  144                     chunk, chunk);
  145         }
  146         return (0);
  147 }
  148 
  149 size_t
  150 sctp_auth_get_chklist_size(const sctp_auth_chklist_t * list)
  151 {
  152         if (list == NULL)
  153                 return (0);
  154         else
  155                 return (list->num_chunks);
  156 }
  157 
  158 /*
  159  * set the default list of chunks requiring AUTH
  160  */
  161 void
  162 sctp_auth_set_default_chunks(sctp_auth_chklist_t * list)
  163 {
  164         (void)sctp_auth_add_chunk(SCTP_ASCONF, list);
  165         (void)sctp_auth_add_chunk(SCTP_ASCONF_ACK, list);
  166 }
  167 
  168 /*
  169  * return the current number and list of required chunks caller must
  170  * guarantee ptr has space for up to 256 bytes
  171  */
  172 int
  173 sctp_serialize_auth_chunks(const sctp_auth_chklist_t * list, uint8_t * ptr)
  174 {
  175         int i, count = 0;
  176 
  177         if (list == NULL)
  178                 return (0);
  179 
  180         for (i = 0; i < 256; i++) {
  181                 if (list->chunks[i] != 0) {
  182                         *ptr++ = i;
  183                         count++;
  184                 }
  185         }
  186         return (count);
  187 }
  188 
  189 int
  190 sctp_pack_auth_chunks(const sctp_auth_chklist_t * list, uint8_t * ptr)
  191 {
  192         int i, size = 0;
  193 
  194         if (list == NULL)
  195                 return (0);
  196 
  197         if (list->num_chunks <= 32) {
  198                 /* just list them, one byte each */
  199                 for (i = 0; i < 256; i++) {
  200                         if (list->chunks[i] != 0) {
  201                                 *ptr++ = i;
  202                                 size++;
  203                         }
  204                 }
  205         } else {
  206                 int index, offset;
  207 
  208                 /* pack into a 32 byte bitfield */
  209                 for (i = 0; i < 256; i++) {
  210                         if (list->chunks[i] != 0) {
  211                                 index = i / 8;
  212                                 offset = i % 8;
  213                                 ptr[index] |= (1 << offset);
  214                         }
  215                 }
  216                 size = 32;
  217         }
  218         return (size);
  219 }
  220 
  221 int
  222 sctp_unpack_auth_chunks(const uint8_t * ptr, uint8_t num_chunks,
  223     sctp_auth_chklist_t * list)
  224 {
  225         int i;
  226         int size;
  227 
  228         if (list == NULL)
  229                 return (0);
  230 
  231         if (num_chunks <= 32) {
  232                 /* just pull them, one byte each */
  233                 for (i = 0; i < num_chunks; i++) {
  234                         (void)sctp_auth_add_chunk(*ptr++, list);
  235                 }
  236                 size = num_chunks;
  237         } else {
  238                 int index, offset;
  239 
  240                 /* unpack from a 32 byte bitfield */
  241                 for (index = 0; index < 32; index++) {
  242                         for (offset = 0; offset < 8; offset++) {
  243                                 if (ptr[index] & (1 << offset)) {
  244                                         (void)sctp_auth_add_chunk((index * 8) + offset, list);
  245                                 }
  246                         }
  247                 }
  248                 size = 32;
  249         }
  250         return (size);
  251 }
  252 
  253 
  254 /*
  255  * allocate structure space for a key of length keylen
  256  */
  257 sctp_key_t *
  258 sctp_alloc_key(uint32_t keylen)
  259 {
  260         sctp_key_t *new_key;
  261 
  262         SCTP_MALLOC(new_key, sctp_key_t *, sizeof(*new_key) + keylen,
  263             SCTP_M_AUTH_KY);
  264         if (new_key == NULL) {
  265                 /* out of memory */
  266                 return (NULL);
  267         }
  268         new_key->keylen = keylen;
  269         return (new_key);
  270 }
  271 
  272 void
  273 sctp_free_key(sctp_key_t * key)
  274 {
  275         if (key != NULL)
  276                 SCTP_FREE(key, SCTP_M_AUTH_KY);
  277 }
  278 
  279 void
  280 sctp_print_key(sctp_key_t * key, const char *str)
  281 {
  282         uint32_t i;
  283 
  284         if (key == NULL) {
  285                 printf("%s: [Null key]\n", str);
  286                 return;
  287         }
  288         printf("%s: len %u, ", str, key->keylen);
  289         if (key->keylen) {
  290                 for (i = 0; i < key->keylen; i++)
  291                         printf("%02x", key->key[i]);
  292                 printf("\n");
  293         } else {
  294                 printf("[Null key]\n");
  295         }
  296 }
  297 
  298 void
  299 sctp_show_key(sctp_key_t * key, const char *str)
  300 {
  301         uint32_t i;
  302 
  303         if (key == NULL) {
  304                 printf("%s: [Null key]\n", str);
  305                 return;
  306         }
  307         printf("%s: len %u, ", str, key->keylen);
  308         if (key->keylen) {
  309                 for (i = 0; i < key->keylen; i++)
  310                         printf("%02x", key->key[i]);
  311                 printf("\n");
  312         } else {
  313                 printf("[Null key]\n");
  314         }
  315 }
  316 
  317 static uint32_t
  318 sctp_get_keylen(sctp_key_t * key)
  319 {
  320         if (key != NULL)
  321                 return (key->keylen);
  322         else
  323                 return (0);
  324 }
  325 
  326 /*
  327  * generate a new random key of length 'keylen'
  328  */
  329 sctp_key_t *
  330 sctp_generate_random_key(uint32_t keylen)
  331 {
  332         sctp_key_t *new_key;
  333 
  334         /* validate keylen */
  335         if (keylen > SCTP_AUTH_RANDOM_SIZE_MAX)
  336                 keylen = SCTP_AUTH_RANDOM_SIZE_MAX;
  337 
  338         new_key = sctp_alloc_key(keylen);
  339         if (new_key == NULL) {
  340                 /* out of memory */
  341                 return (NULL);
  342         }
  343         SCTP_READ_RANDOM(new_key->key, keylen);
  344         new_key->keylen = keylen;
  345         return (new_key);
  346 }
  347 
  348 sctp_key_t *
  349 sctp_set_key(uint8_t * key, uint32_t keylen)
  350 {
  351         sctp_key_t *new_key;
  352 
  353         new_key = sctp_alloc_key(keylen);
  354         if (new_key == NULL) {
  355                 /* out of memory */
  356                 return (NULL);
  357         }
  358         bcopy(key, new_key->key, keylen);
  359         return (new_key);
  360 }
  361 
  362 /*
  363  * given two keys of variable size, compute which key is "larger/smaller"
  364  * returns: 1 if key1 > key2 -1 if key1 < key2 0 if key1 = key2
  365  */
  366 static int
  367 sctp_compare_key(sctp_key_t * key1, sctp_key_t * key2)
  368 {
  369         uint32_t maxlen;
  370         uint32_t i;
  371         uint32_t key1len, key2len;
  372         uint8_t *key_1, *key_2;
  373         uint8_t temp[SCTP_AUTH_RANDOM_SIZE_MAX];
  374 
  375         /* sanity/length check */
  376         key1len = sctp_get_keylen(key1);
  377         key2len = sctp_get_keylen(key2);
  378         if ((key1len == 0) && (key2len == 0))
  379                 return (0);
  380         else if (key1len == 0)
  381                 return (-1);
  382         else if (key2len == 0)
  383                 return (1);
  384 
  385         if (key1len != key2len) {
  386                 if (key1len >= key2len)
  387                         maxlen = key1len;
  388                 else
  389                         maxlen = key2len;
  390                 bzero(temp, maxlen);
  391                 if (key1len < maxlen) {
  392                         /* prepend zeroes to key1 */
  393                         bcopy(key1->key, temp + (maxlen - key1len), key1len);
  394                         key_1 = temp;
  395                         key_2 = key2->key;
  396                 } else {
  397                         /* prepend zeroes to key2 */
  398                         bcopy(key2->key, temp + (maxlen - key2len), key2len);
  399                         key_1 = key1->key;
  400                         key_2 = temp;
  401                 }
  402         } else {
  403                 maxlen = key1len;
  404                 key_1 = key1->key;
  405                 key_2 = key2->key;
  406         }
  407 
  408         for (i = 0; i < maxlen; i++) {
  409                 if (*key_1 > *key_2)
  410                         return (1);
  411                 else if (*key_1 < *key_2)
  412                         return (-1);
  413                 key_1++;
  414                 key_2++;
  415         }
  416 
  417         /* keys are equal value, so check lengths */
  418         if (key1len == key2len)
  419                 return (0);
  420         else if (key1len < key2len)
  421                 return (-1);
  422         else
  423                 return (1);
  424 }
  425 
  426 /*
  427  * generate the concatenated keying material based on the two keys and the
  428  * shared key (if available). draft-ietf-tsvwg-auth specifies the specific
  429  * order for concatenation
  430  */
  431 sctp_key_t *
  432 sctp_compute_hashkey(sctp_key_t * key1, sctp_key_t * key2, sctp_key_t * shared)
  433 {
  434         uint32_t keylen;
  435         sctp_key_t *new_key;
  436         uint8_t *key_ptr;
  437 
  438         keylen = sctp_get_keylen(key1) + sctp_get_keylen(key2) +
  439             sctp_get_keylen(shared);
  440 
  441         if (keylen > 0) {
  442                 /* get space for the new key */
  443                 new_key = sctp_alloc_key(keylen);
  444                 if (new_key == NULL) {
  445                         /* out of memory */
  446                         return (NULL);
  447                 }
  448                 new_key->keylen = keylen;
  449                 key_ptr = new_key->key;
  450         } else {
  451                 /* all keys empty/null?! */
  452                 return (NULL);
  453         }
  454 
  455         /* concatenate the keys */
  456         if (sctp_compare_key(key1, key2) <= 0) {
  457 #ifdef SCTP_AUTH_DRAFT_04
  458                 /* key is key1 + shared + key2 */
  459                 if (sctp_get_keylen(key1)) {
  460                         bcopy(key1->key, key_ptr, key1->keylen);
  461                         key_ptr += key1->keylen;
  462                 }
  463                 if (sctp_get_keylen(shared)) {
  464                         bcopy(shared->key, key_ptr, shared->keylen);
  465                         key_ptr += shared->keylen;
  466                 }
  467                 if (sctp_get_keylen(key2)) {
  468                         bcopy(key2->key, key_ptr, key2->keylen);
  469                         key_ptr += key2->keylen;
  470                 }
  471 #else
  472                 /* key is shared + key1 + key2 */
  473                 if (sctp_get_keylen(shared)) {
  474                         bcopy(shared->key, key_ptr, shared->keylen);
  475                         key_ptr += shared->keylen;
  476                 }
  477                 if (sctp_get_keylen(key1)) {
  478                         bcopy(key1->key, key_ptr, key1->keylen);
  479                         key_ptr += key1->keylen;
  480                 }
  481                 if (sctp_get_keylen(key2)) {
  482                         bcopy(key2->key, key_ptr, key2->keylen);
  483                         key_ptr += key2->keylen;
  484                 }
  485 #endif
  486         } else {
  487 #ifdef SCTP_AUTH_DRAFT_04
  488                 /* key is key2 + shared + key1 */
  489                 if (sctp_get_keylen(key2)) {
  490                         bcopy(key2->key, key_ptr, key2->keylen);
  491                         key_ptr += key2->keylen;
  492                 }
  493                 if (sctp_get_keylen(shared)) {
  494                         bcopy(shared->key, key_ptr, shared->keylen);
  495                         key_ptr += shared->keylen;
  496                 }
  497                 if (sctp_get_keylen(key1)) {
  498                         bcopy(key1->key, key_ptr, key1->keylen);
  499                         key_ptr += key1->keylen;
  500                 }
  501 #else
  502                 /* key is shared + key2 + key1 */
  503                 if (sctp_get_keylen(shared)) {
  504                         bcopy(shared->key, key_ptr, shared->keylen);
  505                         key_ptr += shared->keylen;
  506                 }
  507                 if (sctp_get_keylen(key2)) {
  508                         bcopy(key2->key, key_ptr, key2->keylen);
  509                         key_ptr += key2->keylen;
  510                 }
  511                 if (sctp_get_keylen(key1)) {
  512                         bcopy(key1->key, key_ptr, key1->keylen);
  513                         key_ptr += key1->keylen;
  514                 }
  515 #endif
  516         }
  517         return (new_key);
  518 }
  519 
  520 
  521 sctp_sharedkey_t *
  522 sctp_alloc_sharedkey(void)
  523 {
  524         sctp_sharedkey_t *new_key;
  525 
  526         SCTP_MALLOC(new_key, sctp_sharedkey_t *, sizeof(*new_key),
  527             SCTP_M_AUTH_KY);
  528         if (new_key == NULL) {
  529                 /* out of memory */
  530                 return (NULL);
  531         }
  532         new_key->keyid = 0;
  533         new_key->key = NULL;
  534         return (new_key);
  535 }
  536 
  537 void
  538 sctp_free_sharedkey(sctp_sharedkey_t * skey)
  539 {
  540         if (skey != NULL) {
  541                 if (skey->key != NULL)
  542                         sctp_free_key(skey->key);
  543                 SCTP_FREE(skey, SCTP_M_AUTH_KY);
  544         }
  545 }
  546 
  547 sctp_sharedkey_t *
  548 sctp_find_sharedkey(struct sctp_keyhead *shared_keys, uint16_t key_id)
  549 {
  550         sctp_sharedkey_t *skey;
  551 
  552         LIST_FOREACH(skey, shared_keys, next) {
  553                 if (skey->keyid == key_id)
  554                         return (skey);
  555         }
  556         return (NULL);
  557 }
  558 
  559 void
  560 sctp_insert_sharedkey(struct sctp_keyhead *shared_keys,
  561     sctp_sharedkey_t * new_skey)
  562 {
  563         sctp_sharedkey_t *skey;
  564 
  565         if ((shared_keys == NULL) || (new_skey == NULL))
  566                 return;
  567 
  568         /* insert into an empty list? */
  569         if (SCTP_LIST_EMPTY(shared_keys)) {
  570                 LIST_INSERT_HEAD(shared_keys, new_skey, next);
  571                 return;
  572         }
  573         /* insert into the existing list, ordered by key id */
  574         LIST_FOREACH(skey, shared_keys, next) {
  575                 if (new_skey->keyid < skey->keyid) {
  576                         /* insert it before here */
  577                         LIST_INSERT_BEFORE(skey, new_skey, next);
  578                         return;
  579                 } else if (new_skey->keyid == skey->keyid) {
  580                         /* replace the existing key */
  581                         SCTPDBG(SCTP_DEBUG_AUTH1,
  582                             "replacing shared key id %u\n",
  583                             new_skey->keyid);
  584                         LIST_INSERT_BEFORE(skey, new_skey, next);
  585                         LIST_REMOVE(skey, next);
  586                         sctp_free_sharedkey(skey);
  587                         return;
  588                 }
  589                 if (LIST_NEXT(skey, next) == NULL) {
  590                         /* belongs at the end of the list */
  591                         LIST_INSERT_AFTER(skey, new_skey, next);
  592                         return;
  593                 }
  594         }
  595 }
  596 
  597 static sctp_sharedkey_t *
  598 sctp_copy_sharedkey(const sctp_sharedkey_t * skey)
  599 {
  600         sctp_sharedkey_t *new_skey;
  601 
  602         if (skey == NULL)
  603                 return (NULL);
  604         new_skey = sctp_alloc_sharedkey();
  605         if (new_skey == NULL)
  606                 return (NULL);
  607         if (skey->key != NULL)
  608                 new_skey->key = sctp_set_key(skey->key->key, skey->key->keylen);
  609         else
  610                 new_skey->key = NULL;
  611         new_skey->keyid = skey->keyid;
  612         return (new_skey);
  613 }
  614 
  615 int
  616 sctp_copy_skeylist(const struct sctp_keyhead *src, struct sctp_keyhead *dest)
  617 {
  618         sctp_sharedkey_t *skey, *new_skey;
  619         int count = 0;
  620 
  621         if ((src == NULL) || (dest == NULL))
  622                 return (0);
  623         LIST_FOREACH(skey, src, next) {
  624                 new_skey = sctp_copy_sharedkey(skey);
  625                 if (new_skey != NULL) {
  626                         sctp_insert_sharedkey(dest, new_skey);
  627                         count++;
  628                 }
  629         }
  630         return (count);
  631 }
  632 
  633 
  634 sctp_hmaclist_t *
  635 sctp_alloc_hmaclist(uint8_t num_hmacs)
  636 {
  637         sctp_hmaclist_t *new_list;
  638         int alloc_size;
  639 
  640         alloc_size = sizeof(*new_list) + num_hmacs * sizeof(new_list->hmac[0]);
  641         SCTP_MALLOC(new_list, sctp_hmaclist_t *, alloc_size,
  642             SCTP_M_AUTH_HL);
  643         if (new_list == NULL) {
  644                 /* out of memory */
  645                 return (NULL);
  646         }
  647         new_list->max_algo = num_hmacs;
  648         new_list->num_algo = 0;
  649         return (new_list);
  650 }
  651 
  652 void
  653 sctp_free_hmaclist(sctp_hmaclist_t * list)
  654 {
  655         if (list != NULL) {
  656                 SCTP_FREE(list, SCTP_M_AUTH_HL);
  657                 list = NULL;
  658         }
  659 }
  660 
  661 int
  662 sctp_auth_add_hmacid(sctp_hmaclist_t * list, uint16_t hmac_id)
  663 {
  664         int i;
  665 
  666         if (list == NULL)
  667                 return (-1);
  668         if (list->num_algo == list->max_algo) {
  669                 SCTPDBG(SCTP_DEBUG_AUTH1,
  670                     "SCTP: HMAC id list full, ignoring add %u\n", hmac_id);
  671                 return (-1);
  672         }
  673         if ((hmac_id != SCTP_AUTH_HMAC_ID_SHA1) &&
  674 #ifdef HAVE_SHA224
  675             (hmac_id != SCTP_AUTH_HMAC_ID_SHA224) &&
  676 #endif
  677 #ifdef HAVE_SHA2
  678             (hmac_id != SCTP_AUTH_HMAC_ID_SHA256) &&
  679             (hmac_id != SCTP_AUTH_HMAC_ID_SHA384) &&
  680             (hmac_id != SCTP_AUTH_HMAC_ID_SHA512) &&
  681 #endif
  682             (hmac_id != SCTP_AUTH_HMAC_ID_MD5)) {
  683                 return (-1);
  684         }
  685         /* Now is it already in the list */
  686         for (i = 0; i < list->num_algo; i++) {
  687                 if (list->hmac[i] == hmac_id) {
  688                         /* already in list */
  689                         return (-1);
  690                 }
  691         }
  692         SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: add HMAC id %u to list\n", hmac_id);
  693         list->hmac[list->num_algo++] = hmac_id;
  694         return (0);
  695 }
  696 
  697 sctp_hmaclist_t *
  698 sctp_copy_hmaclist(sctp_hmaclist_t * list)
  699 {
  700         sctp_hmaclist_t *new_list;
  701         int i;
  702 
  703         if (list == NULL)
  704                 return (NULL);
  705         /* get a new list */
  706         new_list = sctp_alloc_hmaclist(list->max_algo);
  707         if (new_list == NULL)
  708                 return (NULL);
  709         /* copy it */
  710         new_list->max_algo = list->max_algo;
  711         new_list->num_algo = list->num_algo;
  712         for (i = 0; i < list->num_algo; i++)
  713                 new_list->hmac[i] = list->hmac[i];
  714         return (new_list);
  715 }
  716 
  717 sctp_hmaclist_t *
  718 sctp_default_supported_hmaclist(void)
  719 {
  720         sctp_hmaclist_t *new_list;
  721 
  722         new_list = sctp_alloc_hmaclist(2);
  723         if (new_list == NULL)
  724                 return (NULL);
  725         (void)sctp_auth_add_hmacid(new_list, SCTP_AUTH_HMAC_ID_SHA1);
  726         (void)sctp_auth_add_hmacid(new_list, SCTP_AUTH_HMAC_ID_SHA256);
  727         return (new_list);
  728 }
  729 
  730 /*
  731  * HMAC algos are listed in priority/preference order find the best HMAC id
  732  * to use for the peer based on local support
  733  */
  734 uint16_t
  735 sctp_negotiate_hmacid(sctp_hmaclist_t * peer, sctp_hmaclist_t * local)
  736 {
  737         int i, j;
  738 
  739         if ((local == NULL) || (peer == NULL))
  740                 return (SCTP_AUTH_HMAC_ID_RSVD);
  741 
  742         for (i = 0; i < peer->num_algo; i++) {
  743                 for (j = 0; j < local->num_algo; j++) {
  744                         if (peer->hmac[i] == local->hmac[j]) {
  745 #ifndef SCTP_AUTH_DRAFT_04
  746                                 /* "skip" MD5 as it's been deprecated */
  747                                 if (peer->hmac[i] == SCTP_AUTH_HMAC_ID_MD5)
  748                                         continue;
  749 #endif
  750 
  751                                 /* found the "best" one */
  752                                 SCTPDBG(SCTP_DEBUG_AUTH1,
  753                                     "SCTP: negotiated peer HMAC id %u\n",
  754                                     peer->hmac[i]);
  755                                 return (peer->hmac[i]);
  756                         }
  757                 }
  758         }
  759         /* didn't find one! */
  760         return (SCTP_AUTH_HMAC_ID_RSVD);
  761 }
  762 
  763 /*
  764  * serialize the HMAC algo list and return space used caller must guarantee
  765  * ptr has appropriate space
  766  */
  767 int
  768 sctp_serialize_hmaclist(sctp_hmaclist_t * list, uint8_t * ptr)
  769 {
  770         int i;
  771         uint16_t hmac_id;
  772 
  773         if (list == NULL)
  774                 return (0);
  775 
  776         for (i = 0; i < list->num_algo; i++) {
  777                 hmac_id = htons(list->hmac[i]);
  778                 bcopy(&hmac_id, ptr, sizeof(hmac_id));
  779                 ptr += sizeof(hmac_id);
  780         }
  781         return (list->num_algo * sizeof(hmac_id));
  782 }
  783 
  784 int
  785 sctp_verify_hmac_param(struct sctp_auth_hmac_algo *hmacs, uint32_t num_hmacs)
  786 {
  787         uint32_t i;
  788         uint16_t hmac_id;
  789         uint32_t sha1_supported = 0;
  790 
  791         for (i = 0; i < num_hmacs; i++) {
  792                 hmac_id = ntohs(hmacs->hmac_ids[i]);
  793                 if (hmac_id == SCTP_AUTH_HMAC_ID_SHA1)
  794                         sha1_supported = 1;
  795         }
  796         /* all HMAC id's are supported */
  797         if (sha1_supported == 0)
  798                 return (-1);
  799         else
  800                 return (0);
  801 }
  802 
  803 sctp_authinfo_t *
  804 sctp_alloc_authinfo(void)
  805 {
  806         sctp_authinfo_t *new_authinfo;
  807 
  808         SCTP_MALLOC(new_authinfo, sctp_authinfo_t *, sizeof(*new_authinfo),
  809             SCTP_M_AUTH_IF);
  810 
  811         if (new_authinfo == NULL) {
  812                 /* out of memory */
  813                 return (NULL);
  814         }
  815         bzero(new_authinfo, sizeof(*new_authinfo));
  816         return (new_authinfo);
  817 }
  818 
  819 void
  820 sctp_free_authinfo(sctp_authinfo_t * authinfo)
  821 {
  822         if (authinfo == NULL)
  823                 return;
  824 
  825         if (authinfo->random != NULL)
  826                 sctp_free_key(authinfo->random);
  827         if (authinfo->peer_random != NULL)
  828                 sctp_free_key(authinfo->peer_random);
  829         if (authinfo->assoc_key != NULL)
  830                 sctp_free_key(authinfo->assoc_key);
  831         if (authinfo->recv_key != NULL)
  832                 sctp_free_key(authinfo->recv_key);
  833 
  834         /* We are NOT dynamically allocating authinfo's right now... */
  835         /* SCTP_FREE(authinfo, SCTP_M_AUTH_??); */
  836 }
  837 
  838 
  839 uint32_t
  840 sctp_get_auth_chunk_len(uint16_t hmac_algo)
  841 {
  842         int size;
  843 
  844         size = sizeof(struct sctp_auth_chunk) + sctp_get_hmac_digest_len(hmac_algo);
  845         return (SCTP_SIZE32(size));
  846 }
  847 
  848 uint32_t
  849 sctp_get_hmac_digest_len(uint16_t hmac_algo)
  850 {
  851         switch (hmac_algo) {
  852         case SCTP_AUTH_HMAC_ID_SHA1:
  853                 return (SCTP_AUTH_DIGEST_LEN_SHA1);
  854         case SCTP_AUTH_HMAC_ID_MD5:
  855                 return (SCTP_AUTH_DIGEST_LEN_MD5);
  856 #ifdef HAVE_SHA224
  857         case SCTP_AUTH_HMAC_ID_SHA224:
  858                 return (SCTP_AUTH_DIGEST_LEN_SHA224);
  859 #endif
  860 #ifdef HAVE_SHA2
  861         case SCTP_AUTH_HMAC_ID_SHA256:
  862                 return (SCTP_AUTH_DIGEST_LEN_SHA256);
  863         case SCTP_AUTH_HMAC_ID_SHA384:
  864                 return (SCTP_AUTH_DIGEST_LEN_SHA384);
  865         case SCTP_AUTH_HMAC_ID_SHA512:
  866                 return (SCTP_AUTH_DIGEST_LEN_SHA512);
  867 #endif
  868         default:
  869                 /* unknown HMAC algorithm: can't do anything */
  870                 return (0);
  871         }                       /* end switch */
  872 }
  873 
  874 static inline int
  875 sctp_get_hmac_block_len(uint16_t hmac_algo)
  876 {
  877         switch (hmac_algo) {
  878                 case SCTP_AUTH_HMAC_ID_SHA1:
  879                 case SCTP_AUTH_HMAC_ID_MD5:
  880 #ifdef HAVE_SHA224
  881                 case SCTP_AUTH_HMAC_ID_SHA224:
  882 #endif
  883                 return (64);
  884 #ifdef HAVE_SHA2
  885         case SCTP_AUTH_HMAC_ID_SHA256:
  886                 return (64);
  887         case SCTP_AUTH_HMAC_ID_SHA384:
  888         case SCTP_AUTH_HMAC_ID_SHA512:
  889                 return (128);
  890 #endif
  891         case SCTP_AUTH_HMAC_ID_RSVD:
  892         default:
  893                 /* unknown HMAC algorithm: can't do anything */
  894                 return (0);
  895         }                       /* end switch */
  896 }
  897 
  898 static void
  899 sctp_hmac_init(uint16_t hmac_algo, sctp_hash_context_t * ctx)
  900 {
  901         switch (hmac_algo) {
  902                 case SCTP_AUTH_HMAC_ID_SHA1:
  903                 SHA1_Init(&ctx->sha1);
  904                 break;
  905         case SCTP_AUTH_HMAC_ID_MD5:
  906                 MD5_Init(&ctx->md5);
  907                 break;
  908 #ifdef HAVE_SHA224
  909         case SCTP_AUTH_HMAC_ID_SHA224:
  910                 break;
  911 #endif
  912 #ifdef HAVE_SHA2
  913         case SCTP_AUTH_HMAC_ID_SHA256:
  914                 SHA256_Init(&ctx->sha256);
  915                 break;
  916         case SCTP_AUTH_HMAC_ID_SHA384:
  917                 SHA384_Init(&ctx->sha384);
  918                 break;
  919         case SCTP_AUTH_HMAC_ID_SHA512:
  920                 SHA512_Init(&ctx->sha512);
  921                 break;
  922 #endif
  923         case SCTP_AUTH_HMAC_ID_RSVD:
  924         default:
  925                 /* unknown HMAC algorithm: can't do anything */
  926                 return;
  927         }                       /* end switch */
  928 }
  929 
  930 static void
  931 sctp_hmac_update(uint16_t hmac_algo, sctp_hash_context_t * ctx,
  932     uint8_t * text, uint32_t textlen)
  933 {
  934         switch (hmac_algo) {
  935                 case SCTP_AUTH_HMAC_ID_SHA1:
  936                 SHA1_Update(&ctx->sha1, text, textlen);
  937                 break;
  938         case SCTP_AUTH_HMAC_ID_MD5:
  939                 MD5_Update(&ctx->md5, text, textlen);
  940                 break;
  941 #ifdef HAVE_SHA224
  942         case SCTP_AUTH_HMAC_ID_SHA224:
  943                 break;
  944 #endif
  945 #ifdef HAVE_SHA2
  946         case SCTP_AUTH_HMAC_ID_SHA256:
  947                 SHA256_Update(&ctx->sha256, text, textlen);
  948                 break;
  949         case SCTP_AUTH_HMAC_ID_SHA384:
  950                 SHA384_Update(&ctx->sha384, text, textlen);
  951                 break;
  952         case SCTP_AUTH_HMAC_ID_SHA512:
  953                 SHA512_Update(&ctx->sha512, text, textlen);
  954                 break;
  955 #endif
  956         case SCTP_AUTH_HMAC_ID_RSVD:
  957         default:
  958                 /* unknown HMAC algorithm: can't do anything */
  959                 return;
  960         }                       /* end switch */
  961 }
  962 
  963 static void
  964 sctp_hmac_final(uint16_t hmac_algo, sctp_hash_context_t * ctx,
  965     uint8_t * digest)
  966 {
  967         switch (hmac_algo) {
  968                 case SCTP_AUTH_HMAC_ID_SHA1:
  969                 SHA1_Final(digest, &ctx->sha1);
  970                 break;
  971         case SCTP_AUTH_HMAC_ID_MD5:
  972                 MD5_Final(digest, &ctx->md5);
  973                 break;
  974 #ifdef HAVE_SHA224
  975         case SCTP_AUTH_HMAC_ID_SHA224:
  976                 break;
  977 #endif
  978 #ifdef HAVE_SHA2
  979         case SCTP_AUTH_HMAC_ID_SHA256:
  980                 SHA256_Final(digest, &ctx->sha256);
  981                 break;
  982         case SCTP_AUTH_HMAC_ID_SHA384:
  983                 /* SHA384 is truncated SHA512 */
  984                 SHA384_Final(digest, &ctx->sha384);
  985                 break;
  986         case SCTP_AUTH_HMAC_ID_SHA512:
  987                 SHA512_Final(digest, &ctx->sha512);
  988                 break;
  989 #endif
  990         case SCTP_AUTH_HMAC_ID_RSVD:
  991         default:
  992                 /* unknown HMAC algorithm: can't do anything */
  993                 return;
  994         }                       /* end switch */
  995 }
  996 
  997 /*
  998  * Keyed-Hashing for Message Authentication: FIPS 198 (RFC 2104)
  999  *
 1000  * Compute the HMAC digest using the desired hash key, text, and HMAC
 1001  * algorithm.  Resulting digest is placed in 'digest' and digest length
 1002  * is returned, if the HMAC was performed.
 1003  *
 1004  * WARNING: it is up to the caller to supply sufficient space to hold the
 1005  * resultant digest.
 1006  */
 1007 uint32_t
 1008 sctp_hmac(uint16_t hmac_algo, uint8_t * key, uint32_t keylen,
 1009     uint8_t * text, uint32_t textlen, uint8_t * digest)
 1010 {
 1011         uint32_t digestlen;
 1012         uint32_t blocklen;
 1013         sctp_hash_context_t ctx;
 1014         uint8_t ipad[128], opad[128];   /* keyed hash inner/outer pads */
 1015         uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX];
 1016         uint32_t i;
 1017 
 1018         /* sanity check the material and length */
 1019         if ((key == NULL) || (keylen == 0) || (text == NULL) ||
 1020             (textlen == 0) || (digest == NULL)) {
 1021                 /* can't do HMAC with empty key or text or digest store */
 1022                 return (0);
 1023         }
 1024         /* validate the hmac algo and get the digest length */
 1025         digestlen = sctp_get_hmac_digest_len(hmac_algo);
 1026         if (digestlen == 0)
 1027                 return (0);
 1028 
 1029         /* hash the key if it is longer than the hash block size */
 1030         blocklen = sctp_get_hmac_block_len(hmac_algo);
 1031         if (keylen > blocklen) {
 1032                 sctp_hmac_init(hmac_algo, &ctx);
 1033                 sctp_hmac_update(hmac_algo, &ctx, key, keylen);
 1034                 sctp_hmac_final(hmac_algo, &ctx, temp);
 1035                 /* set the hashed key as the key */
 1036                 keylen = digestlen;
 1037                 key = temp;
 1038         }
 1039         /* initialize the inner/outer pads with the key and "append" zeroes */
 1040         bzero(ipad, blocklen);
 1041         bzero(opad, blocklen);
 1042         bcopy(key, ipad, keylen);
 1043         bcopy(key, opad, keylen);
 1044 
 1045         /* XOR the key with ipad and opad values */
 1046         for (i = 0; i < blocklen; i++) {
 1047                 ipad[i] ^= 0x36;
 1048                 opad[i] ^= 0x5c;
 1049         }
 1050 
 1051         /* perform inner hash */
 1052         sctp_hmac_init(hmac_algo, &ctx);
 1053         sctp_hmac_update(hmac_algo, &ctx, ipad, blocklen);
 1054         sctp_hmac_update(hmac_algo, &ctx, text, textlen);
 1055         sctp_hmac_final(hmac_algo, &ctx, temp);
 1056 
 1057         /* perform outer hash */
 1058         sctp_hmac_init(hmac_algo, &ctx);
 1059         sctp_hmac_update(hmac_algo, &ctx, opad, blocklen);
 1060         sctp_hmac_update(hmac_algo, &ctx, temp, digestlen);
 1061         sctp_hmac_final(hmac_algo, &ctx, digest);
 1062 
 1063         return (digestlen);
 1064 }
 1065 
 1066 /* mbuf version */
 1067 uint32_t
 1068 sctp_hmac_m(uint16_t hmac_algo, uint8_t * key, uint32_t keylen,
 1069     struct mbuf *m, uint32_t m_offset, uint8_t * digest, uint32_t trailer)
 1070 {
 1071         uint32_t digestlen;
 1072         uint32_t blocklen;
 1073         sctp_hash_context_t ctx;
 1074         uint8_t ipad[128], opad[128];   /* keyed hash inner/outer pads */
 1075         uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX];
 1076         uint32_t i;
 1077         struct mbuf *m_tmp;
 1078 
 1079         /* sanity check the material and length */
 1080         if ((key == NULL) || (keylen == 0) || (m == NULL) || (digest == NULL)) {
 1081                 /* can't do HMAC with empty key or text or digest store */
 1082                 return (0);
 1083         }
 1084         /* validate the hmac algo and get the digest length */
 1085         digestlen = sctp_get_hmac_digest_len(hmac_algo);
 1086         if (digestlen == 0)
 1087                 return (0);
 1088 
 1089         /* hash the key if it is longer than the hash block size */
 1090         blocklen = sctp_get_hmac_block_len(hmac_algo);
 1091         if (keylen > blocklen) {
 1092                 sctp_hmac_init(hmac_algo, &ctx);
 1093                 sctp_hmac_update(hmac_algo, &ctx, key, keylen);
 1094                 sctp_hmac_final(hmac_algo, &ctx, temp);
 1095                 /* set the hashed key as the key */
 1096                 keylen = digestlen;
 1097                 key = temp;
 1098         }
 1099         /* initialize the inner/outer pads with the key and "append" zeroes */
 1100         bzero(ipad, blocklen);
 1101         bzero(opad, blocklen);
 1102         bcopy(key, ipad, keylen);
 1103         bcopy(key, opad, keylen);
 1104 
 1105         /* XOR the key with ipad and opad values */
 1106         for (i = 0; i < blocklen; i++) {
 1107                 ipad[i] ^= 0x36;
 1108                 opad[i] ^= 0x5c;
 1109         }
 1110 
 1111         /* perform inner hash */
 1112         sctp_hmac_init(hmac_algo, &ctx);
 1113         sctp_hmac_update(hmac_algo, &ctx, ipad, blocklen);
 1114         /* find the correct starting mbuf and offset (get start of text) */
 1115         m_tmp = m;
 1116         while ((m_tmp != NULL) && (m_offset >= (uint32_t) SCTP_BUF_LEN(m_tmp))) {
 1117                 m_offset -= SCTP_BUF_LEN(m_tmp);
 1118                 m_tmp = SCTP_BUF_NEXT(m_tmp);
 1119         }
 1120         /* now use the rest of the mbuf chain for the text */
 1121         while (m_tmp != NULL) {
 1122                 if ((SCTP_BUF_NEXT(m_tmp) == NULL) && trailer) {
 1123                         sctp_hmac_update(hmac_algo, &ctx, mtod(m_tmp, uint8_t *) + m_offset,
 1124                             SCTP_BUF_LEN(m_tmp) - (trailer + m_offset));
 1125                 } else {
 1126                         sctp_hmac_update(hmac_algo, &ctx, mtod(m_tmp, uint8_t *) + m_offset,
 1127                             SCTP_BUF_LEN(m_tmp) - m_offset);
 1128                 }
 1129 
 1130                 /* clear the offset since it's only for the first mbuf */
 1131                 m_offset = 0;
 1132                 m_tmp = SCTP_BUF_NEXT(m_tmp);
 1133         }
 1134         sctp_hmac_final(hmac_algo, &ctx, temp);
 1135 
 1136         /* perform outer hash */
 1137         sctp_hmac_init(hmac_algo, &ctx);
 1138         sctp_hmac_update(hmac_algo, &ctx, opad, blocklen);
 1139         sctp_hmac_update(hmac_algo, &ctx, temp, digestlen);
 1140         sctp_hmac_final(hmac_algo, &ctx, digest);
 1141 
 1142         return (digestlen);
 1143 }
 1144 
 1145 /*
 1146  * verify the HMAC digest using the desired hash key, text, and HMAC
 1147  * algorithm. Returns -1 on error, 0 on success.
 1148  */
 1149 int
 1150 sctp_verify_hmac(uint16_t hmac_algo, uint8_t * key, uint32_t keylen,
 1151     uint8_t * text, uint32_t textlen,
 1152     uint8_t * digest, uint32_t digestlen)
 1153 {
 1154         uint32_t len;
 1155         uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX];
 1156 
 1157         /* sanity check the material and length */
 1158         if ((key == NULL) || (keylen == 0) ||
 1159             (text == NULL) || (textlen == 0) || (digest == NULL)) {
 1160                 /* can't do HMAC with empty key or text or digest */
 1161                 return (-1);
 1162         }
 1163         len = sctp_get_hmac_digest_len(hmac_algo);
 1164         if ((len == 0) || (digestlen != len))
 1165                 return (-1);
 1166 
 1167         /* compute the expected hash */
 1168         if (sctp_hmac(hmac_algo, key, keylen, text, textlen, temp) != len)
 1169                 return (-1);
 1170 
 1171         if (memcmp(digest, temp, digestlen) != 0)
 1172                 return (-1);
 1173         else
 1174                 return (0);
 1175 }
 1176 
 1177 
 1178 /*
 1179  * computes the requested HMAC using a key struct (which may be modified if
 1180  * the keylen exceeds the HMAC block len).
 1181  */
 1182 uint32_t
 1183 sctp_compute_hmac(uint16_t hmac_algo, sctp_key_t * key, uint8_t * text,
 1184     uint32_t textlen, uint8_t * digest)
 1185 {
 1186         uint32_t digestlen;
 1187         uint32_t blocklen;
 1188         sctp_hash_context_t ctx;
 1189         uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX];
 1190 
 1191         /* sanity check */
 1192         if ((key == NULL) || (text == NULL) || (textlen == 0) ||
 1193             (digest == NULL)) {
 1194                 /* can't do HMAC with empty key or text or digest store */
 1195                 return (0);
 1196         }
 1197         /* validate the hmac algo and get the digest length */
 1198         digestlen = sctp_get_hmac_digest_len(hmac_algo);
 1199         if (digestlen == 0)
 1200                 return (0);
 1201 
 1202         /* hash the key if it is longer than the hash block size */
 1203         blocklen = sctp_get_hmac_block_len(hmac_algo);
 1204         if (key->keylen > blocklen) {
 1205                 sctp_hmac_init(hmac_algo, &ctx);
 1206                 sctp_hmac_update(hmac_algo, &ctx, key->key, key->keylen);
 1207                 sctp_hmac_final(hmac_algo, &ctx, temp);
 1208                 /* save the hashed key as the new key */
 1209                 key->keylen = digestlen;
 1210                 bcopy(temp, key->key, key->keylen);
 1211         }
 1212         return (sctp_hmac(hmac_algo, key->key, key->keylen, text, textlen,
 1213             digest));
 1214 }
 1215 
 1216 /* mbuf version */
 1217 uint32_t
 1218 sctp_compute_hmac_m(uint16_t hmac_algo, sctp_key_t * key, struct mbuf *m,
 1219     uint32_t m_offset, uint8_t * digest)
 1220 {
 1221         uint32_t digestlen;
 1222         uint32_t blocklen;
 1223         sctp_hash_context_t ctx;
 1224         uint8_t temp[SCTP_AUTH_DIGEST_LEN_MAX];
 1225 
 1226         /* sanity check */
 1227         if ((key == NULL) || (m == NULL) || (digest == NULL)) {
 1228                 /* can't do HMAC with empty key or text or digest store */
 1229                 return (0);
 1230         }
 1231         /* validate the hmac algo and get the digest length */
 1232         digestlen = sctp_get_hmac_digest_len(hmac_algo);
 1233         if (digestlen == 0)
 1234                 return (0);
 1235 
 1236         /* hash the key if it is longer than the hash block size */
 1237         blocklen = sctp_get_hmac_block_len(hmac_algo);
 1238         if (key->keylen > blocklen) {
 1239                 sctp_hmac_init(hmac_algo, &ctx);
 1240                 sctp_hmac_update(hmac_algo, &ctx, key->key, key->keylen);
 1241                 sctp_hmac_final(hmac_algo, &ctx, temp);
 1242                 /* save the hashed key as the new key */
 1243                 key->keylen = digestlen;
 1244                 bcopy(temp, key->key, key->keylen);
 1245         }
 1246         return (sctp_hmac_m(hmac_algo, key->key, key->keylen, m, m_offset, digest, 0));
 1247 }
 1248 
 1249 int
 1250 sctp_auth_is_supported_hmac(sctp_hmaclist_t * list, uint16_t id)
 1251 {
 1252         int i;
 1253 
 1254         if ((list == NULL) || (id == SCTP_AUTH_HMAC_ID_RSVD))
 1255                 return (0);
 1256 
 1257         for (i = 0; i < list->num_algo; i++)
 1258                 if (list->hmac[i] == id)
 1259                         return (1);
 1260 
 1261         /* not in the list */
 1262         return (0);
 1263 }
 1264 
 1265 
 1266 /*
 1267  * clear any cached key(s) if they match the given key id on an association
 1268  * the cached key(s) will be recomputed and re-cached at next use. ASSUMES
 1269  * TCB_LOCK is already held
 1270  */
 1271 void
 1272 sctp_clear_cachedkeys(struct sctp_tcb *stcb, uint16_t keyid)
 1273 {
 1274         if (stcb == NULL)
 1275                 return;
 1276 
 1277         if (keyid == stcb->asoc.authinfo.assoc_keyid) {
 1278                 sctp_free_key(stcb->asoc.authinfo.assoc_key);
 1279                 stcb->asoc.authinfo.assoc_key = NULL;
 1280         }
 1281         if (keyid == stcb->asoc.authinfo.recv_keyid) {
 1282                 sctp_free_key(stcb->asoc.authinfo.recv_key);
 1283                 stcb->asoc.authinfo.recv_key = NULL;
 1284         }
 1285 }
 1286 
 1287 /*
 1288  * clear any cached key(s) if they match the given key id for all assocs on
 1289  * an association ASSUMES INP_WLOCK is already held
 1290  */
 1291 void
 1292 sctp_clear_cachedkeys_ep(struct sctp_inpcb *inp, uint16_t keyid)
 1293 {
 1294         struct sctp_tcb *stcb;
 1295 
 1296         if (inp == NULL)
 1297                 return;
 1298 
 1299         /* clear the cached keys on all assocs on this instance */
 1300         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 1301                 SCTP_TCB_LOCK(stcb);
 1302                 sctp_clear_cachedkeys(stcb, keyid);
 1303                 SCTP_TCB_UNLOCK(stcb);
 1304         }
 1305 }
 1306 
 1307 /*
 1308  * delete a shared key from an association ASSUMES TCB_LOCK is already held
 1309  */
 1310 int
 1311 sctp_delete_sharedkey(struct sctp_tcb *stcb, uint16_t keyid)
 1312 {
 1313         sctp_sharedkey_t *skey;
 1314 
 1315         if (stcb == NULL)
 1316                 return (-1);
 1317 
 1318         /* is the keyid the assoc active sending key */
 1319         if (keyid == stcb->asoc.authinfo.assoc_keyid)
 1320                 return (-1);
 1321 
 1322         /* does the key exist? */
 1323         skey = sctp_find_sharedkey(&stcb->asoc.shared_keys, keyid);
 1324         if (skey == NULL)
 1325                 return (-1);
 1326 
 1327         /* remove it */
 1328         LIST_REMOVE(skey, next);
 1329         sctp_free_sharedkey(skey);      /* frees skey->key as well */
 1330 
 1331         /* clear any cached keys */
 1332         sctp_clear_cachedkeys(stcb, keyid);
 1333         return (0);
 1334 }
 1335 
 1336 /*
 1337  * deletes a shared key from the endpoint ASSUMES INP_WLOCK is already held
 1338  */
 1339 int
 1340 sctp_delete_sharedkey_ep(struct sctp_inpcb *inp, uint16_t keyid)
 1341 {
 1342         sctp_sharedkey_t *skey;
 1343         struct sctp_tcb *stcb;
 1344 
 1345         if (inp == NULL)
 1346                 return (-1);
 1347 
 1348         /* is the keyid the active sending key on the endpoint or any assoc */
 1349         if (keyid == inp->sctp_ep.default_keyid)
 1350                 return (-1);
 1351         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
 1352                 SCTP_TCB_LOCK(stcb);
 1353                 if (keyid == stcb->asoc.authinfo.assoc_keyid) {
 1354                         SCTP_TCB_UNLOCK(stcb);
 1355                         return (-1);
 1356                 }
 1357                 SCTP_TCB_UNLOCK(stcb);
 1358         }
 1359 
 1360         /* does the key exist? */
 1361         skey = sctp_find_sharedkey(&inp->sctp_ep.shared_keys, keyid);
 1362         if (skey == NULL)
 1363                 return (-1);
 1364 
 1365         /* remove it */
 1366         LIST_REMOVE(skey, next);
 1367         sctp_free_sharedkey(skey);      /* frees skey->key as well */
 1368 
 1369         /* clear any cached keys */
 1370         sctp_clear_cachedkeys_ep(inp, keyid);
 1371         return (0);
 1372 }
 1373 
 1374 /*
 1375  * set the active key on an association ASSUME TCB_LOCK is already held
 1376  */
 1377 int
 1378 sctp_auth_setactivekey(struct sctp_tcb *stcb, uint16_t keyid)
 1379 {
 1380         sctp_sharedkey_t *skey = NULL;
 1381         sctp_key_t *key = NULL;
 1382         int using_ep_key = 0;
 1383 
 1384         /* find the key on the assoc */
 1385         skey = sctp_find_sharedkey(&stcb->asoc.shared_keys, keyid);
 1386         if (skey == NULL) {
 1387                 /* if not on the assoc, find the key on the endpoint */
 1388                 atomic_add_int(&stcb->asoc.refcnt, 1);
 1389                 SCTP_TCB_UNLOCK(stcb);
 1390                 SCTP_INP_RLOCK(stcb->sctp_ep);
 1391                 SCTP_TCB_LOCK(stcb);
 1392                 atomic_add_int(&stcb->asoc.refcnt, -1);
 1393                 skey = sctp_find_sharedkey(&stcb->sctp_ep->sctp_ep.shared_keys,
 1394                     keyid);
 1395                 using_ep_key = 1;
 1396         }
 1397         if (skey == NULL) {
 1398                 /* that key doesn't exist */
 1399                 if (using_ep_key) {
 1400                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
 1401                 }
 1402                 return (-1);
 1403         }
 1404         /* get the shared key text */
 1405         key = skey->key;
 1406 
 1407         /* free any existing cached key */
 1408         if (stcb->asoc.authinfo.assoc_key != NULL)
 1409                 sctp_free_key(stcb->asoc.authinfo.assoc_key);
 1410         /* compute a new assoc key and cache it */
 1411         stcb->asoc.authinfo.assoc_key =
 1412             sctp_compute_hashkey(stcb->asoc.authinfo.random,
 1413             stcb->asoc.authinfo.peer_random, key);
 1414         stcb->asoc.authinfo.assoc_keyid = keyid;
 1415 #ifdef SCTP_DEBUG
 1416         if (SCTP_AUTH_DEBUG)
 1417                 sctp_print_key(stcb->asoc.authinfo.assoc_key, "Assoc Key");
 1418 #endif
 1419 
 1420         if (using_ep_key) {
 1421                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
 1422         }
 1423         return (0);
 1424 }
 1425 
 1426 /*
 1427  * set the active key on an endpoint ASSUMES INP_WLOCK is already held
 1428  */
 1429 int
 1430 sctp_auth_setactivekey_ep(struct sctp_inpcb *inp, uint16_t keyid)
 1431 {
 1432         sctp_sharedkey_t *skey;
 1433 
 1434         /* find the key */
 1435         skey = sctp_find_sharedkey(&inp->sctp_ep.shared_keys, keyid);
 1436         if (skey == NULL) {
 1437                 /* that key doesn't exist */
 1438                 return (-1);
 1439         }
 1440         inp->sctp_ep.default_keyid = keyid;
 1441         return (0);
 1442 }
 1443 
 1444 /*
 1445  * get local authentication parameters from cookie (from INIT-ACK)
 1446  */
 1447 void
 1448 sctp_auth_get_cookie_params(struct sctp_tcb *stcb, struct mbuf *m,
 1449     uint32_t offset, uint32_t length)
 1450 {
 1451         struct sctp_paramhdr *phdr, tmp_param;
 1452         uint16_t plen, ptype;
 1453         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
 1454         struct sctp_auth_random *p_random = NULL;
 1455         uint16_t random_len = 0;
 1456         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
 1457         struct sctp_auth_hmac_algo *hmacs = NULL;
 1458         uint16_t hmacs_len = 0;
 1459         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
 1460         struct sctp_auth_chunk_list *chunks = NULL;
 1461         uint16_t num_chunks = 0;
 1462         sctp_key_t *new_key;
 1463         uint32_t keylen;
 1464 
 1465         /* convert to upper bound */
 1466         length += offset;
 1467 
 1468         phdr = (struct sctp_paramhdr *)sctp_m_getptr(m, offset,
 1469             sizeof(struct sctp_paramhdr), (uint8_t *) & tmp_param);
 1470         while (phdr != NULL) {
 1471                 ptype = ntohs(phdr->param_type);
 1472                 plen = ntohs(phdr->param_length);
 1473 
 1474                 if ((plen == 0) || (offset + plen > length))
 1475                         break;
 1476 
 1477                 if (ptype == SCTP_RANDOM) {
 1478                         if (plen > sizeof(random_store))
 1479                                 break;
 1480                         phdr = sctp_get_next_param(m, offset,
 1481                             (struct sctp_paramhdr *)random_store, min(plen, sizeof(random_store)));
 1482                         if (phdr == NULL)
 1483                                 return;
 1484                         /* save the random and length for the key */
 1485                         p_random = (struct sctp_auth_random *)phdr;
 1486                         random_len = plen - sizeof(*p_random);
 1487                 } else if (ptype == SCTP_HMAC_LIST) {
 1488                         int num_hmacs;
 1489                         int i;
 1490 
 1491                         if (plen > sizeof(hmacs_store))
 1492                                 break;
 1493                         phdr = sctp_get_next_param(m, offset,
 1494                             (struct sctp_paramhdr *)hmacs_store, min(plen, sizeof(hmacs_store)));
 1495                         if (phdr == NULL)
 1496                                 return;
 1497                         /* save the hmacs list and num for the key */
 1498                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
 1499                         hmacs_len = plen - sizeof(*hmacs);
 1500                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
 1501                         if (stcb->asoc.local_hmacs != NULL)
 1502                                 sctp_free_hmaclist(stcb->asoc.local_hmacs);
 1503                         stcb->asoc.local_hmacs = sctp_alloc_hmaclist(num_hmacs);
 1504                         if (stcb->asoc.local_hmacs != NULL) {
 1505                                 for (i = 0; i < num_hmacs; i++) {
 1506                                         (void)sctp_auth_add_hmacid(stcb->asoc.local_hmacs,
 1507                                             ntohs(hmacs->hmac_ids[i]));
 1508                                 }
 1509                         }
 1510                 } else if (ptype == SCTP_CHUNK_LIST) {
 1511                         int i;
 1512 
 1513                         if (plen > sizeof(chunks_store))
 1514                                 break;
 1515                         phdr = sctp_get_next_param(m, offset,
 1516                             (struct sctp_paramhdr *)chunks_store, min(plen, sizeof(chunks_store)));
 1517                         if (phdr == NULL)
 1518                                 return;
 1519                         chunks = (struct sctp_auth_chunk_list *)phdr;
 1520                         num_chunks = plen - sizeof(*chunks);
 1521                         /* save chunks list and num for the key */
 1522                         if (stcb->asoc.local_auth_chunks != NULL)
 1523                                 sctp_clear_chunklist(stcb->asoc.local_auth_chunks);
 1524                         else
 1525                                 stcb->asoc.local_auth_chunks = sctp_alloc_chunklist();
 1526                         for (i = 0; i < num_chunks; i++) {
 1527                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
 1528                                     stcb->asoc.local_auth_chunks);
 1529                         }
 1530                 }
 1531                 /* get next parameter */
 1532                 offset += SCTP_SIZE32(plen);
 1533                 if (offset + sizeof(struct sctp_paramhdr) > length)
 1534                         break;
 1535                 phdr = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(struct sctp_paramhdr),
 1536                     (uint8_t *) & tmp_param);
 1537         }
 1538         /* concatenate the full random key */
 1539 #ifdef SCTP_AUTH_DRAFT_04
 1540         keylen = random_len;
 1541         new_key = sctp_alloc_key(keylen);
 1542         if (new_key != NULL) {
 1543                 /* copy in the RANDOM */
 1544                 if (p_random != NULL)
 1545                         bcopy(p_random->random_data, new_key->key, random_len);
 1546         }
 1547 #else
 1548         keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
 1549             sizeof(*hmacs) + hmacs_len;
 1550         new_key = sctp_alloc_key(keylen);
 1551         if (new_key != NULL) {
 1552                 /* copy in the RANDOM */
 1553                 if (p_random != NULL) {
 1554                         keylen = sizeof(*p_random) + random_len;
 1555                         bcopy(p_random, new_key->key, keylen);
 1556                 }
 1557                 /* append in the AUTH chunks */
 1558                 if (chunks != NULL) {
 1559                         bcopy(chunks, new_key->key + keylen,
 1560                             sizeof(*chunks) + num_chunks);
 1561                         keylen += sizeof(*chunks) + num_chunks;
 1562                 }
 1563                 /* append in the HMACs */
 1564                 if (hmacs != NULL) {
 1565                         bcopy(hmacs, new_key->key + keylen,
 1566                             sizeof(*hmacs) + hmacs_len);
 1567                 }
 1568         }
 1569 #endif
 1570         if (stcb->asoc.authinfo.random != NULL)
 1571                 sctp_free_key(stcb->asoc.authinfo.random);
 1572         stcb->asoc.authinfo.random = new_key;
 1573         stcb->asoc.authinfo.random_len = random_len;
 1574 #ifdef SCTP_AUTH_DRAFT_04
 1575         /* don't include the chunks and hmacs for draft -04 */
 1576         stcb->asoc.authinfo.random->keylen = random_len;
 1577 #endif
 1578         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
 1579         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
 1580 
 1581         /* negotiate what HMAC to use for the peer */
 1582         stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
 1583             stcb->asoc.local_hmacs);
 1584         /* copy defaults from the endpoint */
 1585         /* FIX ME: put in cookie? */
 1586         stcb->asoc.authinfo.assoc_keyid = stcb->sctp_ep->sctp_ep.default_keyid;
 1587 }
 1588 
 1589 /*
 1590  * compute and fill in the HMAC digest for a packet
 1591  */
 1592 void
 1593 sctp_fill_hmac_digest_m(struct mbuf *m, uint32_t auth_offset,
 1594     struct sctp_auth_chunk *auth, struct sctp_tcb *stcb)
 1595 {
 1596         uint32_t digestlen;
 1597         sctp_sharedkey_t *skey;
 1598         sctp_key_t *key;
 1599 
 1600         if ((stcb == NULL) || (auth == NULL))
 1601                 return;
 1602 
 1603         /* zero the digest + chunk padding */
 1604         digestlen = sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
 1605         bzero(auth->hmac, SCTP_SIZE32(digestlen));
 1606         /* is an assoc key cached? */
 1607         if (stcb->asoc.authinfo.assoc_key == NULL) {
 1608                 skey = sctp_find_sharedkey(&stcb->asoc.shared_keys,
 1609                     stcb->asoc.authinfo.assoc_keyid);
 1610                 if (skey == NULL) {
 1611                         /* not in the assoc list, so check the endpoint list */
 1612                         skey = sctp_find_sharedkey(&stcb->sctp_ep->sctp_ep.shared_keys,
 1613                             stcb->asoc.authinfo.assoc_keyid);
 1614                 }
 1615                 /* the only way skey is NULL is if null key id 0 is used */
 1616                 if (skey != NULL)
 1617                         key = skey->key;
 1618                 else
 1619                         key = NULL;
 1620                 /* compute a new assoc key and cache it */
 1621                 stcb->asoc.authinfo.assoc_key =
 1622                     sctp_compute_hashkey(stcb->asoc.authinfo.random,
 1623                     stcb->asoc.authinfo.peer_random, key);
 1624                 SCTPDBG(SCTP_DEBUG_AUTH1, "caching key id %u\n",
 1625                     stcb->asoc.authinfo.assoc_keyid);
 1626 #ifdef SCTP_DEBUG
 1627                 if (SCTP_AUTH_DEBUG)
 1628                         sctp_print_key(stcb->asoc.authinfo.assoc_key,
 1629                             "Assoc Key");
 1630 #endif
 1631         }
 1632         /* set in the active key id */
 1633         auth->shared_key_id = htons(stcb->asoc.authinfo.assoc_keyid);
 1634 
 1635         /* compute and fill in the digest */
 1636         (void)sctp_compute_hmac_m(stcb->asoc.peer_hmac_id,
 1637             stcb->asoc.authinfo.assoc_key,
 1638             m, auth_offset, auth->hmac);
 1639 }
 1640 
 1641 
 1642 static void
 1643 sctp_bzero_m(struct mbuf *m, uint32_t m_offset, uint32_t size)
 1644 {
 1645         struct mbuf *m_tmp;
 1646         uint8_t *data;
 1647 
 1648         /* sanity check */
 1649         if (m == NULL)
 1650                 return;
 1651 
 1652         /* find the correct starting mbuf and offset (get start position) */
 1653         m_tmp = m;
 1654         while ((m_tmp != NULL) && (m_offset >= (uint32_t) SCTP_BUF_LEN(m_tmp))) {
 1655                 m_offset -= SCTP_BUF_LEN(m_tmp);
 1656                 m_tmp = SCTP_BUF_NEXT(m_tmp);
 1657         }
 1658         /* now use the rest of the mbuf chain */
 1659         while ((m_tmp != NULL) && (size > 0)) {
 1660                 data = mtod(m_tmp, uint8_t *) + m_offset;
 1661                 if (size > (uint32_t) SCTP_BUF_LEN(m_tmp)) {
 1662                         bzero(data, SCTP_BUF_LEN(m_tmp));
 1663                         size -= SCTP_BUF_LEN(m_tmp);
 1664                 } else {
 1665                         bzero(data, size);
 1666                         size = 0;
 1667                 }
 1668                 /* clear the offset since it's only for the first mbuf */
 1669                 m_offset = 0;
 1670                 m_tmp = SCTP_BUF_NEXT(m_tmp);
 1671         }
 1672 }
 1673 
 1674 /*
 1675  * process the incoming Authentication chunk return codes: -1 on any
 1676  * authentication error 0 on authentication verification
 1677  */
 1678 int
 1679 sctp_handle_auth(struct sctp_tcb *stcb, struct sctp_auth_chunk *auth,
 1680     struct mbuf *m, uint32_t offset)
 1681 {
 1682         uint16_t chunklen;
 1683         uint16_t shared_key_id;
 1684         uint16_t hmac_id;
 1685         sctp_sharedkey_t *skey;
 1686         uint32_t digestlen;
 1687         uint8_t digest[SCTP_AUTH_DIGEST_LEN_MAX];
 1688         uint8_t computed_digest[SCTP_AUTH_DIGEST_LEN_MAX];
 1689 
 1690         /* auth is checked for NULL by caller */
 1691         chunklen = ntohs(auth->ch.chunk_length);
 1692         if (chunklen < sizeof(*auth)) {
 1693                 SCTP_STAT_INCR(sctps_recvauthfailed);
 1694                 return (-1);
 1695         }
 1696         SCTP_STAT_INCR(sctps_recvauth);
 1697 
 1698         /* get the auth params */
 1699         shared_key_id = ntohs(auth->shared_key_id);
 1700         hmac_id = ntohs(auth->hmac_id);
 1701         SCTPDBG(SCTP_DEBUG_AUTH1,
 1702             "SCTP AUTH Chunk: shared key %u, HMAC id %u\n",
 1703             shared_key_id, hmac_id);
 1704 
 1705         /* is the indicated HMAC supported? */
 1706         if (!sctp_auth_is_supported_hmac(stcb->asoc.local_hmacs, hmac_id)) {
 1707                 struct mbuf *m_err;
 1708                 struct sctp_auth_invalid_hmac *err;
 1709 
 1710                 SCTP_STAT_INCR(sctps_recvivalhmacid);
 1711                 SCTPDBG(SCTP_DEBUG_AUTH1,
 1712                     "SCTP Auth: unsupported HMAC id %u\n",
 1713                     hmac_id);
 1714                 /*
 1715                  * report this in an Error Chunk: Unsupported HMAC
 1716                  * Identifier
 1717                  */
 1718                 m_err = sctp_get_mbuf_for_msg(sizeof(*err), 0, M_DONTWAIT,
 1719                     1, MT_HEADER);
 1720                 if (m_err != NULL) {
 1721                         /* pre-reserve some space */
 1722                         SCTP_BUF_RESV_UF(m_err, sizeof(struct sctp_chunkhdr));
 1723                         /* fill in the error */
 1724                         err = mtod(m_err, struct sctp_auth_invalid_hmac *);
 1725                         bzero(err, sizeof(*err));
 1726                         err->ph.param_type = htons(SCTP_CAUSE_UNSUPPORTED_HMACID);
 1727                         err->ph.param_length = htons(sizeof(*err));
 1728                         err->hmac_id = ntohs(hmac_id);
 1729                         SCTP_BUF_LEN(m_err) = sizeof(*err);
 1730                         /* queue it */
 1731                         sctp_queue_op_err(stcb, m_err);
 1732                 }
 1733                 return (-1);
 1734         }
 1735         /* get the indicated shared key, if available */
 1736         if ((stcb->asoc.authinfo.recv_key == NULL) ||
 1737             (stcb->asoc.authinfo.recv_keyid != shared_key_id)) {
 1738                 /* find the shared key on the assoc first */
 1739                 skey = sctp_find_sharedkey(&stcb->asoc.shared_keys, shared_key_id);
 1740                 if (skey == NULL) {
 1741                         /* if not on the assoc, find it on the endpoint */
 1742                         skey = sctp_find_sharedkey(&stcb->sctp_ep->sctp_ep.shared_keys,
 1743                             shared_key_id);
 1744                 }
 1745                 /* if the shared key isn't found, discard the chunk */
 1746                 if (skey == NULL) {
 1747                         SCTP_STAT_INCR(sctps_recvivalkeyid);
 1748                         SCTPDBG(SCTP_DEBUG_AUTH1,
 1749                             "SCTP Auth: unknown key id %u\n",
 1750                             shared_key_id);
 1751                         return (-1);
 1752                 }
 1753                 /* generate a notification if this is a new key id */
 1754                 if (stcb->asoc.authinfo.recv_keyid != shared_key_id)
 1755                         /*
 1756                          * sctp_ulp_notify(SCTP_NOTIFY_AUTH_NEW_KEY, stcb,
 1757                          * shared_key_id, (void
 1758                          * *)stcb->asoc.authinfo.recv_keyid);
 1759                          */
 1760                         sctp_notify_authentication(stcb, SCTP_AUTH_NEWKEY,
 1761                             shared_key_id, stcb->asoc.authinfo.recv_keyid);
 1762                 /* compute a new recv assoc key and cache it */
 1763                 if (stcb->asoc.authinfo.recv_key != NULL)
 1764                         sctp_free_key(stcb->asoc.authinfo.recv_key);
 1765                 stcb->asoc.authinfo.recv_key =
 1766                     sctp_compute_hashkey(stcb->asoc.authinfo.random,
 1767                     stcb->asoc.authinfo.peer_random, skey->key);
 1768                 stcb->asoc.authinfo.recv_keyid = shared_key_id;
 1769 #ifdef SCTP_DEBUG
 1770                 if (SCTP_AUTH_DEBUG)
 1771                         sctp_print_key(stcb->asoc.authinfo.recv_key, "Recv Key");
 1772 #endif
 1773         }
 1774         /* validate the digest length */
 1775         digestlen = sctp_get_hmac_digest_len(hmac_id);
 1776         if (chunklen < (sizeof(*auth) + digestlen)) {
 1777                 /* invalid digest length */
 1778                 SCTP_STAT_INCR(sctps_recvauthfailed);
 1779                 SCTPDBG(SCTP_DEBUG_AUTH1,
 1780                     "SCTP Auth: chunk too short for HMAC\n");
 1781                 return (-1);
 1782         }
 1783         /* save a copy of the digest, zero the pseudo header, and validate */
 1784         bcopy(auth->hmac, digest, digestlen);
 1785         sctp_bzero_m(m, offset + sizeof(*auth), SCTP_SIZE32(digestlen));
 1786         (void)sctp_compute_hmac_m(hmac_id, stcb->asoc.authinfo.recv_key,
 1787             m, offset, computed_digest);
 1788 
 1789         /* compare the computed digest with the one in the AUTH chunk */
 1790         if (memcmp(digest, computed_digest, digestlen) != 0) {
 1791                 SCTP_STAT_INCR(sctps_recvauthfailed);
 1792                 SCTPDBG(SCTP_DEBUG_AUTH1,
 1793                     "SCTP Auth: HMAC digest check failed\n");
 1794                 return (-1);
 1795         }
 1796         return (0);
 1797 }
 1798 
 1799 /*
 1800  * Generate NOTIFICATION
 1801  */
 1802 void
 1803 sctp_notify_authentication(struct sctp_tcb *stcb, uint32_t indication,
 1804     uint16_t keyid, uint16_t alt_keyid)
 1805 {
 1806         struct mbuf *m_notify;
 1807         struct sctp_authkey_event *auth;
 1808         struct sctp_queued_to_read *control;
 1809 
 1810         if ((stcb == NULL) ||
 1811             (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
 1812             (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
 1813             (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET)
 1814             ) {
 1815                 /* If the socket is gone we are out of here */
 1816                 return;
 1817         }
 1818         if (sctp_is_feature_off(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTHEVNT))
 1819                 /* event not enabled */
 1820                 return;
 1821 
 1822         m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_authkey_event),
 1823             0, M_DONTWAIT, 1, MT_HEADER);
 1824         if (m_notify == NULL)
 1825                 /* no space left */
 1826                 return;
 1827 
 1828         SCTP_BUF_LEN(m_notify) = 0;
 1829         auth = mtod(m_notify, struct sctp_authkey_event *);
 1830         auth->auth_type = SCTP_AUTHENTICATION_EVENT;
 1831         auth->auth_flags = 0;
 1832         auth->auth_length = sizeof(*auth);
 1833         auth->auth_keynumber = keyid;
 1834         auth->auth_altkeynumber = alt_keyid;
 1835         auth->auth_indication = indication;
 1836         auth->auth_assoc_id = sctp_get_associd(stcb);
 1837 
 1838         SCTP_BUF_LEN(m_notify) = sizeof(*auth);
 1839         SCTP_BUF_NEXT(m_notify) = NULL;
 1840 
 1841         /* append to socket */
 1842         control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
 1843             0, 0, 0, 0, 0, 0, m_notify);
 1844         if (control == NULL) {
 1845                 /* no memory */
 1846                 sctp_m_freem(m_notify);
 1847                 return;
 1848         }
 1849         control->spec_flags = M_NOTIFICATION;
 1850         control->length = SCTP_BUF_LEN(m_notify);
 1851         /* not that we need this */
 1852         control->tail_mbuf = m_notify;
 1853         sctp_add_to_readq(stcb->sctp_ep, stcb, control,
 1854             &stcb->sctp_socket->so_rcv, 1, SCTP_SO_NOT_LOCKED);
 1855 }
 1856 
 1857 
 1858 /*
 1859  * validates the AUTHentication related parameters in an INIT/INIT-ACK
 1860  * Note: currently only used for INIT as INIT-ACK is handled inline
 1861  * with sctp_load_addresses_from_init()
 1862  */
 1863 int
 1864 sctp_validate_init_auth_params(struct mbuf *m, int offset, int limit)
 1865 {
 1866         struct sctp_paramhdr *phdr, parm_buf;
 1867         uint16_t ptype, plen;
 1868         int peer_supports_asconf = 0;
 1869         int peer_supports_auth = 0;
 1870         int got_random = 0, got_hmacs = 0, got_chklist = 0;
 1871         uint8_t saw_asconf = 0;
 1872         uint8_t saw_asconf_ack = 0;
 1873 
 1874         /* go through each of the params. */
 1875         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
 1876         while (phdr) {
 1877                 ptype = ntohs(phdr->param_type);
 1878                 plen = ntohs(phdr->param_length);
 1879 
 1880                 if (offset + plen > limit) {
 1881                         break;
 1882                 }
 1883                 if (plen < sizeof(struct sctp_paramhdr)) {
 1884                         break;
 1885                 }
 1886                 if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
 1887                         /* A supported extension chunk */
 1888                         struct sctp_supported_chunk_types_param *pr_supported;
 1889                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
 1890                         int num_ent, i;
 1891 
 1892                         phdr = sctp_get_next_param(m, offset,
 1893                             (struct sctp_paramhdr *)&local_store, min(plen, sizeof(local_store)));
 1894                         if (phdr == NULL) {
 1895                                 return (-1);
 1896                         }
 1897                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
 1898                         num_ent = plen - sizeof(struct sctp_paramhdr);
 1899                         for (i = 0; i < num_ent; i++) {
 1900                                 switch (pr_supported->chunk_types[i]) {
 1901                                 case SCTP_ASCONF:
 1902                                 case SCTP_ASCONF_ACK:
 1903                                         peer_supports_asconf = 1;
 1904                                         break;
 1905                                 case SCTP_AUTHENTICATION:
 1906                                         peer_supports_auth = 1;
 1907                                         break;
 1908                                 default:
 1909                                         /* one we don't care about */
 1910                                         break;
 1911                                 }
 1912                         }
 1913                 } else if (ptype == SCTP_RANDOM) {
 1914                         got_random = 1;
 1915                         /* enforce the random length */
 1916                         if (plen != (sizeof(struct sctp_auth_random) +
 1917                             SCTP_AUTH_RANDOM_SIZE_REQUIRED)) {
 1918                                 SCTPDBG(SCTP_DEBUG_AUTH1,
 1919                                     "SCTP: invalid RANDOM len\n");
 1920                                 return (-1);
 1921                         }
 1922                 } else if (ptype == SCTP_HMAC_LIST) {
 1923                         uint8_t store[SCTP_PARAM_BUFFER_SIZE];
 1924                         struct sctp_auth_hmac_algo *hmacs;
 1925                         int num_hmacs;
 1926 
 1927                         if (plen > sizeof(store))
 1928                                 break;
 1929                         phdr = sctp_get_next_param(m, offset,
 1930                             (struct sctp_paramhdr *)store, min(plen, sizeof(store)));
 1931                         if (phdr == NULL)
 1932                                 return (-1);
 1933                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
 1934                         num_hmacs = (plen - sizeof(*hmacs)) /
 1935                             sizeof(hmacs->hmac_ids[0]);
 1936                         /* validate the hmac list */
 1937                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
 1938                                 SCTPDBG(SCTP_DEBUG_AUTH1,
 1939                                     "SCTP: invalid HMAC param\n");
 1940                                 return (-1);
 1941                         }
 1942                         got_hmacs = 1;
 1943                 } else if (ptype == SCTP_CHUNK_LIST) {
 1944                         int i, num_chunks;
 1945                         uint8_t chunks_store[SCTP_SMALL_CHUNK_STORE];
 1946 
 1947                         /* did the peer send a non-empty chunk list? */
 1948                         struct sctp_auth_chunk_list *chunks = NULL;
 1949 
 1950                         phdr = sctp_get_next_param(m, offset,
 1951                             (struct sctp_paramhdr *)chunks_store,
 1952                             min(plen, sizeof(chunks_store)));
 1953                         if (phdr == NULL)
 1954                                 return (-1);
 1955 
 1956                         /*-
 1957                          * Flip through the list and mark that the
 1958                          * peer supports asconf/asconf_ack.
 1959                          */
 1960                         chunks = (struct sctp_auth_chunk_list *)phdr;
 1961                         num_chunks = plen - sizeof(*chunks);
 1962                         for (i = 0; i < num_chunks; i++) {
 1963                                 /* record asconf/asconf-ack if listed */
 1964                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
 1965                                         saw_asconf = 1;
 1966                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
 1967                                         saw_asconf_ack = 1;
 1968 
 1969                         }
 1970                         if (num_chunks)
 1971                                 got_chklist = 1;
 1972                 }
 1973                 offset += SCTP_SIZE32(plen);
 1974                 if (offset >= limit) {
 1975                         break;
 1976                 }
 1977                 phdr = sctp_get_next_param(m, offset, &parm_buf,
 1978                     sizeof(parm_buf));
 1979         }
 1980         /* validate authentication required parameters */
 1981         if (got_random && got_hmacs) {
 1982                 peer_supports_auth = 1;
 1983         } else {
 1984                 peer_supports_auth = 0;
 1985         }
 1986         if (!peer_supports_auth && got_chklist) {
 1987                 SCTPDBG(SCTP_DEBUG_AUTH1,
 1988                     "SCTP: peer sent chunk list w/o AUTH\n");
 1989                 return (-1);
 1990         }
 1991         if (!sctp_asconf_auth_nochk && peer_supports_asconf &&
 1992             !peer_supports_auth) {
 1993                 SCTPDBG(SCTP_DEBUG_AUTH1,
 1994                     "SCTP: peer supports ASCONF but not AUTH\n");
 1995                 return (-1);
 1996         } else if ((peer_supports_asconf) && (peer_supports_auth) &&
 1997             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
 1998                 return (-2);
 1999         }
 2000         return (0);
 2001 }
 2002 
 2003 void
 2004 sctp_initialize_auth_params(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
 2005 {
 2006         uint16_t chunks_len = 0;
 2007         uint16_t hmacs_len = 0;
 2008         uint16_t random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT;
 2009         sctp_key_t *new_key;
 2010         uint16_t keylen;
 2011 
 2012         /* initialize hmac list from endpoint */
 2013         stcb->asoc.local_hmacs = sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
 2014         if (stcb->asoc.local_hmacs != NULL) {
 2015                 hmacs_len = stcb->asoc.local_hmacs->num_algo *
 2016                     sizeof(stcb->asoc.local_hmacs->hmac[0]);
 2017         }
 2018         /* initialize auth chunks list from endpoint */
 2019         stcb->asoc.local_auth_chunks =
 2020             sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
 2021         if (stcb->asoc.local_auth_chunks != NULL) {
 2022                 int i;
 2023 
 2024                 for (i = 0; i < 256; i++) {
 2025                         if (stcb->asoc.local_auth_chunks->chunks[i])
 2026                                 chunks_len++;
 2027                 }
 2028         }
 2029         /* copy defaults from the endpoint */
 2030         stcb->asoc.authinfo.assoc_keyid = inp->sctp_ep.default_keyid;
 2031 
 2032         /* now set the concatenated key (random + chunks + hmacs) */
 2033 #ifdef SCTP_AUTH_DRAFT_04
 2034         /* don't include the chunks and hmacs for draft -04 */
 2035         keylen = random_len;
 2036         new_key = sctp_generate_random_key(keylen);
 2037 #else
 2038         /* key includes parameter headers */
 2039         keylen = (3 * sizeof(struct sctp_paramhdr)) + random_len + chunks_len +
 2040             hmacs_len;
 2041         new_key = sctp_alloc_key(keylen);
 2042         if (new_key != NULL) {
 2043                 struct sctp_paramhdr *ph;
 2044                 int plen;
 2045 
 2046                 /* generate and copy in the RANDOM */
 2047                 ph = (struct sctp_paramhdr *)new_key->key;
 2048                 ph->param_type = htons(SCTP_RANDOM);
 2049                 plen = sizeof(*ph) + random_len;
 2050                 ph->param_length = htons(plen);
 2051                 SCTP_READ_RANDOM(new_key->key + sizeof(*ph), random_len);
 2052                 keylen = plen;
 2053 
 2054                 /* append in the AUTH chunks */
 2055                 /* NOTE: currently we always have chunks to list */
 2056                 ph = (struct sctp_paramhdr *)(new_key->key + keylen);
 2057                 ph->param_type = htons(SCTP_CHUNK_LIST);
 2058                 plen = sizeof(*ph) + chunks_len;
 2059                 ph->param_length = htons(plen);
 2060                 keylen += sizeof(*ph);
 2061                 if (stcb->asoc.local_auth_chunks) {
 2062                         int i;
 2063 
 2064                         for (i = 0; i < 256; i++) {
 2065                                 if (stcb->asoc.local_auth_chunks->chunks[i])
 2066                                         new_key->key[keylen++] = i;
 2067                         }
 2068                 }
 2069                 /* append in the HMACs */
 2070                 ph = (struct sctp_paramhdr *)(new_key->key + keylen);
 2071                 ph->param_type = htons(SCTP_HMAC_LIST);
 2072                 plen = sizeof(*ph) + hmacs_len;
 2073                 ph->param_length = htons(plen);
 2074                 keylen += sizeof(*ph);
 2075                 (void)sctp_serialize_hmaclist(stcb->asoc.local_hmacs,
 2076                     new_key->key + keylen);
 2077         }
 2078 #endif
 2079         if (stcb->asoc.authinfo.random != NULL)
 2080                 sctp_free_key(stcb->asoc.authinfo.random);
 2081         stcb->asoc.authinfo.random = new_key;
 2082         stcb->asoc.authinfo.random_len = random_len;
 2083 }
 2084 
 2085 
 2086 #ifdef SCTP_HMAC_TEST
 2087 /*
 2088  * HMAC and key concatenation tests
 2089  */
 2090 static void
 2091 sctp_print_digest(uint8_t * digest, uint32_t digestlen, const char *str)
 2092 {
 2093         uint32_t i;
 2094 
 2095         printf("\n%s: 0x", str);
 2096         if (digest == NULL)
 2097                 return;
 2098 
 2099         for (i = 0; i < digestlen; i++)
 2100                 printf("%02x", digest[i]);
 2101 }
 2102 
 2103 static int
 2104 sctp_test_hmac(const char *str, uint16_t hmac_id, uint8_t * key,
 2105     uint32_t keylen, uint8_t * text, uint32_t textlen,
 2106     uint8_t * digest, uint32_t digestlen)
 2107 {
 2108         uint8_t computed_digest[SCTP_AUTH_DIGEST_LEN_MAX];
 2109 
 2110         printf("\n%s:", str);
 2111         sctp_hmac(hmac_id, key, keylen, text, textlen, computed_digest);
 2112         sctp_print_digest(digest, digestlen, "Expected digest");
 2113         sctp_print_digest(computed_digest, digestlen, "Computed digest");
 2114         if (memcmp(digest, computed_digest, digestlen) != 0) {
 2115                 printf("\nFAILED");
 2116                 return (-1);
 2117         } else {
 2118                 printf("\nPASSED");
 2119                 return (0);
 2120         }
 2121 }
 2122 
 2123 
 2124 /*
 2125  * RFC 2202: HMAC-SHA1 test cases
 2126  */
 2127 void
 2128 sctp_test_hmac_sha1(void)
 2129 {
 2130         uint8_t *digest;
 2131         uint8_t key[128];
 2132         uint32_t keylen;
 2133         uint8_t text[128];
 2134         uint32_t textlen;
 2135         uint32_t digestlen = 20;
 2136         int failed = 0;
 2137 
 2138         /*
 2139          * test_case =     1 key =
 2140          * 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b key_len =       20
 2141          * data =          "Hi There" data_len =      8 digest =
 2142          * 0xb617318655057264e28bc0b6fb378c8ef146be00
 2143          */
 2144         keylen = 20;
 2145         memset(key, 0x0b, keylen);
 2146         textlen = 8;
 2147         strcpy(text, "Hi There");
 2148         digest = "\xb6\x17\x31\x86\x55\x05\x72\x64\xe2\x8b\xc0\xb6\xfb\x37\x8c\x8e\xf1\x46\xbe\x00";
 2149         if (sctp_test_hmac("SHA1 test case 1", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
 2150             text, textlen, digest, digestlen) < 0)
 2151                 failed++;
 2152 
 2153         /*
 2154          * test_case =     2 key =           "Jefe" key_len =       4 data =
 2155          * "what do ya want for nothing?" data_len =      28 digest =
 2156          * 0xeffcdf6ae5eb2fa2d27416d5f184df9c259a7c79
 2157          */
 2158         keylen = 4;
 2159         strcpy(key, "Jefe");
 2160         textlen = 28;
 2161         strcpy(text, "what do ya want for nothing?");
 2162         digest = "\xef\xfc\xdf\x6a\xe5\xeb\x2f\xa2\xd2\x74\x16\xd5\xf1\x84\xdf\x9c\x25\x9a\x7c\x79";
 2163         if (sctp_test_hmac("SHA1 test case 2", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
 2164             text, textlen, digest, digestlen) < 0)
 2165                 failed++;
 2166 
 2167         /*
 2168          * test_case =     3 key =
 2169          * 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa key_len =       20
 2170          * data =          0xdd repeated 50 times data_len =      50 digest
 2171          * = 0x125d7342b9ac11cd91a39af48aa17b4f63f175d3
 2172          */
 2173         keylen = 20;
 2174         memset(key, 0xaa, keylen);
 2175         textlen = 50;
 2176         memset(text, 0xdd, textlen);
 2177         digest = "\x12\x5d\x73\x42\xb9\xac\x11\xcd\x91\xa3\x9a\xf4\x8a\xa1\x7b\x4f\x63\xf1\x75\xd3";
 2178         if (sctp_test_hmac("SHA1 test case 3", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
 2179             text, textlen, digest, digestlen) < 0)
 2180                 failed++;
 2181 
 2182         /*
 2183          * test_case =     4 key =
 2184          * 0x0102030405060708090a0b0c0d0e0f10111213141516171819 key_len = 25
 2185          * data =          0xcd repeated 50 times data_len =      50 digest
 2186          * =        0x4c9007f4026250c6bc8414f9bf50c86c2d7235da
 2187          */
 2188         keylen = 25;
 2189         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);
 2190         textlen = 50;
 2191         memset(text, 0xcd, textlen);
 2192         digest = "\x4c\x90\x07\xf4\x02\x62\x50\xc6\xbc\x84\x14\xf9\xbf\x50\xc8\x6c\x2d\x72\x35\xda";
 2193         if (sctp_test_hmac("SHA1 test case 4", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
 2194             text, textlen, digest, digestlen) < 0)
 2195                 failed++;
 2196 
 2197         /*
 2198          * test_case =     5 key =
 2199          * 0x0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c key_len =       20
 2200          * data =          "Test With Truncation" data_len =      20 digest
 2201          * = 0x4c1a03424b55e07fe7f27be1d58bb9324a9a5a04 digest-96 =
 2202          * 0x4c1a03424b55e07fe7f27be1
 2203          */
 2204         keylen = 20;
 2205         memset(key, 0x0c, keylen);
 2206         textlen = 20;
 2207         strcpy(text, "Test With Truncation");
 2208         digest = "\x4c\x1a\x03\x42\x4b\x55\xe0\x7f\xe7\xf2\x7b\xe1\xd5\x8b\xb9\x32\x4a\x9a\x5a\x04";
 2209         if (sctp_test_hmac("SHA1 test case 5", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
 2210             text, textlen, digest, digestlen) < 0)
 2211                 failed++;
 2212 
 2213         /*
 2214          * test_case =     6 key =           0xaa repeated 80 times key_len
 2215          * = 80 data =          "Test Using Larger Than Block-Size Key -
 2216          * Hash Key First" data_len =      54 digest =
 2217          * 0xaa4ae5e15272d00e95705637ce8a3b55ed402112
 2218          */
 2219         keylen = 80;
 2220         memset(key, 0xaa, keylen);
 2221         textlen = 54;
 2222         strcpy(text, "Test Using Larger Than Block-Size Key - Hash Key First");
 2223         digest = "\xaa\x4a\xe5\xe1\x52\x72\xd0\x0e\x95\x70\x56\x37\xce\x8a\x3b\x55\xed\x40\x21\x12";
 2224         if (sctp_test_hmac("SHA1 test case 6", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
 2225             text, textlen, digest, digestlen) < 0)
 2226                 failed++;
 2227 
 2228         /*
 2229          * test_case =     7 key =           0xaa repeated 80 times key_len
 2230          * = 80 data =          "Test Using Larger Than Block-Size Key and
 2231          * Larger Than One Block-Size Data" data_len =      73 digest =
 2232          * 0xe8e99d0f45237d786d6bbaa7965c7808bbff1a91
 2233          */
 2234         keylen = 80;
 2235         memset(key, 0xaa, keylen);
 2236         textlen = 73;
 2237         strcpy(text, "Test Using Larger Than Block-Size Key and Larger Than One Block-Size Data");
 2238         digest = "\xe8\xe9\x9d\x0f\x45\x23\x7d\x78\x6d\x6b\xba\xa7\x96\x5c\x78\x08\xbb\xff\x1a\x91";
 2239         if (sctp_test_hmac("SHA1 test case 7", SCTP_AUTH_HMAC_ID_SHA1, key, keylen,
 2240             text, textlen, digest, digestlen) < 0)
 2241                 failed++;
 2242 
 2243         /* done with all tests */
 2244         if (failed)
 2245                 printf("\nSHA1 test results: %d cases failed", failed);
 2246         else
 2247                 printf("\nSHA1 test results: all test cases passed");
 2248 }
 2249 
 2250 /*
 2251  * RFC 2202: HMAC-MD5 test cases
 2252  */
 2253 void
 2254 sctp_test_hmac_md5(void)
 2255 {
 2256         uint8_t *digest;
 2257         uint8_t key[128];
 2258         uint32_t keylen;
 2259         uint8_t text[128];
 2260         uint32_t textlen;
 2261         uint32_t digestlen = 16;
 2262         int failed = 0;
 2263 
 2264         /*
 2265          * test_case =     1 key = 0x0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b
 2266          * key_len =       16 data = "Hi There" data_len =      8 digest =
 2267          * 0x9294727a3638bb1c13f48ef8158bfc9d
 2268          */
 2269         keylen = 16;
 2270         memset(key, 0x0b, keylen);
 2271         textlen = 8;
 2272         strcpy(text, "Hi There");
 2273         digest = "\x92\x94\x72\x7a\x36\x38\xbb\x1c\x13\xf4\x8e\xf8\x15\x8b\xfc\x9d";
 2274         if (sctp_test_hmac("MD5 test case 1", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
 2275             text, textlen, digest, digestlen) < 0)
 2276                 failed++;
 2277 
 2278         /*
 2279          * test_case =     2 key =           "Jefe" key_len =       4 data =
 2280          * "what do ya want for nothing?" data_len =      28 digest =
 2281          * 0x750c783e6ab0b503eaa86e310a5db738
 2282          */
 2283         keylen = 4;
 2284         strcpy(key, "Jefe");
 2285         textlen = 28;
 2286         strcpy(text, "what do ya want for nothing?");
 2287         digest = "\x75\x0c\x78\x3e\x6a\xb0\xb5\x03\xea\xa8\x6e\x31\x0a\x5d\xb7\x38";
 2288         if (sctp_test_hmac("MD5 test case 2", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
 2289             text, textlen, digest, digestlen) < 0)
 2290                 failed++;
 2291 
 2292         /*
 2293          * test_case =     3 key = 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
 2294          * key_len =       16 data = 0xdd repeated 50 times data_len = 50
 2295          * digest = 0x56be34521d144c88dbb8c733f0e8b3f6
 2296          */
 2297         keylen = 16;
 2298         memset(key, 0xaa, keylen);
 2299         textlen = 50;
 2300         memset(text, 0xdd, textlen);
 2301         digest = "\x56\xbe\x34\x52\x1d\x14\x4c\x88\xdb\xb8\xc7\x33\xf0\xe8\xb3\xf6";
 2302         if (sctp_test_hmac("MD5 test case 3", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
 2303             text, textlen, digest, digestlen) < 0)
 2304                 failed++;
 2305 
 2306         /*
 2307          * test_case =     4 key =
 2308          * 0x0102030405060708090a0b0c0d0e0f10111213141516171819 key_len = 25
 2309          * data =          0xcd repeated 50 times data_len =      50 digest
 2310          * =        0x697eaf0aca3a3aea3a75164746ffaa79
 2311          */
 2312         keylen = 25;
 2313         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);
 2314         textlen = 50;
 2315         memset(text, 0xcd, textlen);
 2316         digest = "\x69\x7e\xaf\x0a\xca\x3a\x3a\xea\x3a\x75\x16\x47\x46\xff\xaa\x79";
 2317         if (sctp_test_hmac("MD5 test case 4", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
 2318             text, textlen, digest, digestlen) < 0)
 2319                 failed++;
 2320 
 2321         /*
 2322          * test_case =     5 key = 0x0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c
 2323          * key_len =       16 data = "Test With Truncation" data_len = 20
 2324          * digest = 0x56461ef2342edc00f9bab995690efd4c digest-96
 2325          * 0x56461ef2342edc00f9bab995
 2326          */
 2327         keylen = 16;
 2328         memset(key, 0x0c, keylen);
 2329         textlen = 20;
 2330         strcpy(text, "Test With Truncation");
 2331         digest = "\x56\x46\x1e\xf2\x34\x2e\xdc\x00\xf9\xba\xb9\x95\x69\x0e\xfd\x4c";
 2332         if (sctp_test_hmac("MD5 test case 5", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
 2333             text, textlen, digest, digestlen) < 0)
 2334                 failed++;
 2335 
 2336         /*
 2337          * test_case =     6 key =           0xaa repeated 80 times key_len
 2338          * = 80 data =          "Test Using Larger Than Block-Size Key -
 2339          * Hash Key First" data_len =      54 digest =
 2340          * 0x6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd
 2341          */
 2342         keylen = 80;
 2343         memset(key, 0xaa, keylen);
 2344         textlen = 54;
 2345         strcpy(text, "Test Using Larger Than Block-Size Key - Hash Key First");
 2346         digest = "\x6b\x1a\xb7\xfe\x4b\xd7\xbf\x8f\x0b\x62\xe6\xce\x61\xb9\xd0\xcd";
 2347         if (sctp_test_hmac("MD5 test case 6", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
 2348             text, textlen, digest, digestlen) < 0)
 2349                 failed++;
 2350 
 2351         /*
 2352          * test_case =     7 key =           0xaa repeated 80 times key_len
 2353          * = 80 data =          "Test Using Larger Than Block-Size Key and
 2354          * Larger Than One Block-Size Data" data_len =      73 digest =
 2355          * 0x6f630fad67cda0ee1fb1f562db3aa53e
 2356          */
 2357         keylen = 80;
 2358         memset(key, 0xaa, keylen);
 2359         textlen = 73;
 2360         strcpy(text, "Test Using Larger Than Block-Size Key and Larger Than One Block-Size Data");
 2361         digest = "\x6f\x63\x0f\xad\x67\xcd\xa0\xee\x1f\xb1\xf5\x62\xdb\x3a\xa5\x3e";
 2362         if (sctp_test_hmac("MD5 test case 7", SCTP_AUTH_HMAC_ID_MD5, key, keylen,
 2363             text, textlen, digest, digestlen) < 0)
 2364                 failed++;
 2365 
 2366         /* done with all tests */
 2367         if (failed)
 2368                 printf("\nMD5 test results: %d cases failed", failed);
 2369         else
 2370                 printf("\nMD5 test results: all test cases passed");
 2371 }
 2372 
 2373 /*
 2374  * test assoc key concatenation
 2375  */
 2376 static int
 2377 sctp_test_key_concatenation(sctp_key_t * key1, sctp_key_t * key2,
 2378     sctp_key_t * expected_key)
 2379 {
 2380         sctp_key_t *key;
 2381         int ret_val;
 2382 
 2383         sctp_show_key(key1, "\nkey1");
 2384         sctp_show_key(key2, "\nkey2");
 2385         key = sctp_compute_hashkey(key1, key2, NULL);
 2386         sctp_show_key(expected_key, "\nExpected");
 2387         sctp_show_key(key, "\nComputed");
 2388         if (memcmp(key, expected_key, expected_key->keylen) != 0) {
 2389                 printf("\nFAILED");
 2390                 ret_val = -1;
 2391         } else {
 2392                 printf("\nPASSED");
 2393                 ret_val = 0;
 2394         }
 2395         sctp_free_key(key1);
 2396         sctp_free_key(key2);
 2397         sctp_free_key(expected_key);
 2398         sctp_free_key(key);
 2399         return (ret_val);
 2400 }
 2401 
 2402 
 2403 void
 2404 sctp_test_authkey(void)
 2405 {
 2406         sctp_key_t *key1, *key2, *expected_key;
 2407         int failed = 0;
 2408 
 2409         /* test case 1 */
 2410         key1 = sctp_set_key("\x01\x01\x01\x01", 4);
 2411         key2 = sctp_set_key("\x01\x02\x03\x04", 4);
 2412         expected_key = sctp_set_key("\x01\x01\x01\x01\x01\x02\x03\x04", 8);
 2413         if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
 2414                 failed++;
 2415 
 2416         /* test case 2 */
 2417         key1 = sctp_set_key("\x00\x00\x00\x01", 4);
 2418         key2 = sctp_set_key("\x02", 1);
 2419         expected_key = sctp_set_key("\x00\x00\x00\x01\x02", 5);
 2420         if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
 2421                 failed++;
 2422 
 2423         /* test case 3 */
 2424         key1 = sctp_set_key("\x01", 1);
 2425         key2 = sctp_set_key("\x00\x00\x00\x02", 4);
 2426         expected_key = sctp_set_key("\x01\x00\x00\x00\x02", 5);
 2427         if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
 2428                 failed++;
 2429 
 2430         /* test case 4 */
 2431         key1 = sctp_set_key("\x00\x00\x00\x01", 4);
 2432         key2 = sctp_set_key("\x01", 1);
 2433         expected_key = sctp_set_key("\x01\x00\x00\x00\x01", 5);
 2434         if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
 2435                 failed++;
 2436 
 2437         /* test case 5 */
 2438         key1 = sctp_set_key("\x01", 1);
 2439         key2 = sctp_set_key("\x00\x00\x00\x01", 4);
 2440         expected_key = sctp_set_key("\x01\x00\x00\x00\x01", 5);
 2441         if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
 2442                 failed++;
 2443 
 2444         /* test case 6 */
 2445         key1 = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x07", 11);
 2446         key2 = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x08", 11);
 2447         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);
 2448         if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
 2449                 failed++;
 2450 
 2451         /* test case 7 */
 2452         key1 = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x08", 11);
 2453         key2 = sctp_set_key("\x00\x00\x00\x00\x01\x02\x03\x04\x05\x06\x07", 11);
 2454         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);
 2455         if (sctp_test_key_concatenation(key1, key2, expected_key) < 0)
 2456                 failed++;
 2457 
 2458         /* done with all tests */
 2459         if (failed)
 2460                 printf("\nKey concatenation test results: %d cases failed", failed);
 2461         else
 2462                 printf("\nKey concatenation test results: all test cases passed");
 2463 }
 2464 
 2465 
 2466 #if defined(STANDALONE_HMAC_TEST)
 2467 int
 2468 main(void)
 2469 {
 2470         sctp_test_hmac_sha1();
 2471         sctp_test_hmac_md5();
 2472         sctp_test_authkey();
 2473 }
 2474 
 2475 #endif                          /* STANDALONE_HMAC_TEST */
 2476 
 2477 #endif                          /* SCTP_HMAC_TEST */

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