2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD: head/sys/netinet/sctp_auth.h 269858 2014-08-12 11:30:16Z tuexen $");
38 #ifndef _NETINET_SCTP_AUTH_H_
39 #define _NETINET_SCTP_AUTH_H_
41 #include <netinet/sctp_os.h>
44 #define SCTP_AUTH_DIGEST_LEN_SHA1 20
45 #define SCTP_AUTH_DIGEST_LEN_SHA256 32
46 #define SCTP_AUTH_DIGEST_LEN_MAX SCTP_AUTH_DIGEST_LEN_SHA256
49 #define SCTP_AUTH_RANDOM_SIZE_DEFAULT 32
50 #define SCTP_AUTH_RANDOM_SIZE_REQUIRED 32
52 /* union of all supported HMAC algorithm contexts */
53 typedef union sctp_hash_context {
55 #if defined(SCTP_SUPPORT_HMAC_SHA256)
56 SCTP_SHA256_CTX sha256;
58 } sctp_hash_context_t;
60 typedef struct sctp_key {
65 typedef struct sctp_shared_key {
66 LIST_ENTRY(sctp_shared_key) next;
67 sctp_key_t *key; /* key text */
68 uint32_t refcount; /* reference count */
69 uint16_t keyid; /* shared key ID */
70 uint8_t deactivated; /* key is deactivated */
73 LIST_HEAD(sctp_keyhead, sctp_shared_key);
75 /* authentication chunks list */
76 typedef struct sctp_auth_chklist {
79 } sctp_auth_chklist_t;
81 /* hmac algos supported list */
82 typedef struct sctp_hmaclist {
83 uint16_t max_algo; /* max algorithms allocated */
84 uint16_t num_algo; /* num algorithms used */
88 /* authentication info */
89 typedef struct sctp_authinformation {
90 sctp_key_t *random; /* local random key (concatenated) */
91 uint32_t random_len; /* local random number length for param */
92 sctp_key_t *peer_random;/* peer's random key (concatenated) */
93 sctp_key_t *assoc_key; /* cached concatenated send key */
94 sctp_key_t *recv_key; /* cached concatenated recv key */
95 uint16_t active_keyid; /* active send keyid */
96 uint16_t assoc_keyid; /* current send keyid (cached) */
97 uint16_t recv_keyid; /* last recv keyid (cached) */
105 #define sctp_auth_is_required_chunk(chunk, list) ((list == NULL) ? (0) : (list->chunks[chunk] != 0))
108 * function prototypes
111 /* socket option api functions */
112 extern sctp_auth_chklist_t *sctp_alloc_chunklist(void);
113 extern void sctp_free_chunklist(sctp_auth_chklist_t *chklist);
114 extern void sctp_clear_chunklist(sctp_auth_chklist_t *chklist);
115 extern sctp_auth_chklist_t *sctp_copy_chunklist(sctp_auth_chklist_t *chklist);
116 extern int sctp_auth_add_chunk(uint8_t chunk, sctp_auth_chklist_t *list);
117 extern int sctp_auth_delete_chunk(uint8_t chunk, sctp_auth_chklist_t *list);
118 extern size_t sctp_auth_get_chklist_size(const sctp_auth_chklist_t *list);
119 extern int sctp_serialize_auth_chunks(const sctp_auth_chklist_t *list,
121 extern int sctp_pack_auth_chunks(const sctp_auth_chklist_t *list,
123 extern int sctp_unpack_auth_chunks(const uint8_t *ptr, uint8_t num_chunks,
124 sctp_auth_chklist_t *list);
127 extern sctp_key_t *sctp_alloc_key(uint32_t keylen);
128 extern void sctp_free_key(sctp_key_t *key);
129 extern void sctp_print_key(sctp_key_t *key, const char *str);
130 extern void sctp_show_key(sctp_key_t *key, const char *str);
131 extern sctp_key_t *sctp_generate_random_key(uint32_t keylen);
132 extern sctp_key_t *sctp_set_key(uint8_t *key, uint32_t keylen);
133 extern sctp_key_t *sctp_compute_hashkey(sctp_key_t *key1, sctp_key_t *key2,
136 /* shared key handling */
137 extern sctp_sharedkey_t *sctp_alloc_sharedkey(void);
138 extern void sctp_free_sharedkey(sctp_sharedkey_t *skey);
139 extern sctp_sharedkey_t *sctp_find_sharedkey(struct sctp_keyhead *shared_keys,
141 extern int sctp_insert_sharedkey(struct sctp_keyhead *shared_keys,
142 sctp_sharedkey_t *new_skey);
143 extern int sctp_copy_skeylist(const struct sctp_keyhead *src,
144 struct sctp_keyhead *dest);
145 /* ref counts on shared keys, by key id */
146 extern void sctp_auth_key_acquire(struct sctp_tcb *stcb, uint16_t keyid);
147 extern void sctp_auth_key_release(struct sctp_tcb *stcb, uint16_t keyid,
151 /* hmac list handling */
152 extern sctp_hmaclist_t *sctp_alloc_hmaclist(uint8_t num_hmacs);
153 extern void sctp_free_hmaclist(sctp_hmaclist_t *list);
154 extern int sctp_auth_add_hmacid(sctp_hmaclist_t *list, uint16_t hmac_id);
155 extern sctp_hmaclist_t *sctp_copy_hmaclist(sctp_hmaclist_t *list);
156 extern sctp_hmaclist_t *sctp_default_supported_hmaclist(void);
157 extern uint16_t sctp_negotiate_hmacid(sctp_hmaclist_t *peer,
158 sctp_hmaclist_t *local);
159 extern int sctp_serialize_hmaclist(sctp_hmaclist_t *list, uint8_t *ptr);
160 extern int sctp_verify_hmac_param(struct sctp_auth_hmac_algo *hmacs,
163 extern sctp_authinfo_t *sctp_alloc_authinfo(void);
164 extern void sctp_free_authinfo(sctp_authinfo_t *authinfo);
166 /* keyed-HMAC functions */
167 extern uint32_t sctp_get_auth_chunk_len(uint16_t hmac_algo);
168 extern uint32_t sctp_get_hmac_digest_len(uint16_t hmac_algo);
169 extern uint32_t sctp_hmac(uint16_t hmac_algo, uint8_t *key, uint32_t keylen,
170 uint8_t *text, uint32_t textlen, uint8_t *digest);
171 extern int sctp_verify_hmac(uint16_t hmac_algo, uint8_t *key, uint32_t keylen,
172 uint8_t *text, uint32_t textlen, uint8_t *digest, uint32_t digestlen);
173 extern uint32_t sctp_compute_hmac(uint16_t hmac_algo, sctp_key_t *key,
174 uint8_t *text, uint32_t textlen, uint8_t *digest);
175 extern int sctp_auth_is_supported_hmac(sctp_hmaclist_t *list, uint16_t id);
178 extern uint32_t sctp_hmac_m(uint16_t hmac_algo, uint8_t *key, uint32_t keylen,
179 struct mbuf *m, uint32_t m_offset, uint8_t *digest, uint32_t trailer);
180 extern uint32_t sctp_compute_hmac_m(uint16_t hmac_algo, sctp_key_t *key,
181 struct mbuf *m, uint32_t m_offset, uint8_t *digest);
184 * authentication routines
186 extern void sctp_clear_cachedkeys(struct sctp_tcb *stcb, uint16_t keyid);
187 extern void sctp_clear_cachedkeys_ep(struct sctp_inpcb *inp, uint16_t keyid);
188 extern int sctp_delete_sharedkey(struct sctp_tcb *stcb, uint16_t keyid);
189 extern int sctp_delete_sharedkey_ep(struct sctp_inpcb *inp, uint16_t keyid);
190 extern int sctp_auth_setactivekey(struct sctp_tcb *stcb, uint16_t keyid);
191 extern int sctp_auth_setactivekey_ep(struct sctp_inpcb *inp, uint16_t keyid);
192 extern int sctp_deact_sharedkey(struct sctp_tcb *stcb, uint16_t keyid);
193 extern int sctp_deact_sharedkey_ep(struct sctp_inpcb *inp, uint16_t keyid);
195 extern void sctp_auth_get_cookie_params(struct sctp_tcb *stcb, struct mbuf *m,
196 uint32_t offset, uint32_t length);
197 extern void sctp_fill_hmac_digest_m(struct mbuf *m, uint32_t auth_offset,
198 struct sctp_auth_chunk *auth, struct sctp_tcb *stcb, uint16_t key_id);
199 extern struct mbuf *sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
200 struct sctp_auth_chunk **auth_ret, uint32_t *offset,
201 struct sctp_tcb *stcb, uint8_t chunk);
202 extern int sctp_handle_auth(struct sctp_tcb *stcb, struct sctp_auth_chunk *ch,
203 struct mbuf *m, uint32_t offset);
204 extern void sctp_notify_authentication(struct sctp_tcb *stcb,
205 uint32_t indication, uint16_t keyid, uint16_t alt_keyid, int so_locked);
206 extern int sctp_validate_init_auth_params(struct mbuf *m, int offset,
208 extern void sctp_initialize_auth_params(struct sctp_inpcb *inp,
209 struct sctp_tcb *stcb);
212 #ifdef SCTP_HMAC_TEST
213 extern void sctp_test_hmac_sha1(void);
214 extern void sctp_test_authkey(void);
216 #endif /* __SCTP_AUTH_H__ */