2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
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 SCTP_SHA256_CTX sha256;
56 } sctp_hash_context_t;
58 typedef struct sctp_key {
63 typedef struct sctp_shared_key {
64 LIST_ENTRY(sctp_shared_key) next;
65 sctp_key_t *key; /* key text */
66 uint32_t refcount; /* reference count */
67 uint16_t keyid; /* shared key ID */
68 uint8_t deactivated; /* key is deactivated */
71 LIST_HEAD(sctp_keyhead, sctp_shared_key);
73 /* authentication chunks list */
74 typedef struct sctp_auth_chklist {
77 } sctp_auth_chklist_t;
79 /* hmac algos supported list */
80 typedef struct sctp_hmaclist {
81 uint16_t max_algo; /* max algorithms allocated */
82 uint16_t num_algo; /* num algorithms used */
86 /* authentication info */
87 typedef struct sctp_authinformation {
88 sctp_key_t *random; /* local random key (concatenated) */
89 uint32_t random_len; /* local random number length for param */
90 sctp_key_t *peer_random; /* peer's random key (concatenated) */
91 sctp_key_t *assoc_key; /* cached concatenated send key */
92 sctp_key_t *recv_key; /* cached concatenated recv key */
93 uint16_t active_keyid; /* active send keyid */
94 uint16_t assoc_keyid; /* current send keyid (cached) */
95 uint16_t recv_keyid; /* last recv keyid (cached) */
103 #define sctp_auth_is_required_chunk(chunk, list) ((list == NULL) ? (0) : (list->chunks[chunk] != 0))
106 * function prototypes
109 /* socket option api functions */
110 extern sctp_auth_chklist_t *sctp_alloc_chunklist(void);
111 extern void sctp_free_chunklist(sctp_auth_chklist_t *chklist);
112 extern void sctp_clear_chunklist(sctp_auth_chklist_t *chklist);
113 extern sctp_auth_chklist_t *sctp_copy_chunklist(sctp_auth_chklist_t *chklist);
114 extern int sctp_auth_add_chunk(uint8_t chunk, sctp_auth_chklist_t *list);
115 extern int sctp_auth_delete_chunk(uint8_t chunk, sctp_auth_chklist_t *list);
116 extern size_t sctp_auth_get_chklist_size(const sctp_auth_chklist_t *list);
118 sctp_serialize_auth_chunks(const sctp_auth_chklist_t *list,
121 sctp_pack_auth_chunks(const sctp_auth_chklist_t *list,
124 sctp_unpack_auth_chunks(const uint8_t *ptr, uint8_t num_chunks,
125 sctp_auth_chklist_t *list);
128 extern sctp_key_t *sctp_alloc_key(uint32_t keylen);
129 extern void sctp_free_key(sctp_key_t *key);
130 extern void sctp_print_key(sctp_key_t *key, const char *str);
131 extern void sctp_show_key(sctp_key_t *key, const char *str);
132 extern sctp_key_t *sctp_generate_random_key(uint32_t keylen);
133 extern sctp_key_t *sctp_set_key(uint8_t *key, uint32_t keylen);
135 sctp_compute_hashkey(sctp_key_t *key1, sctp_key_t *key2,
138 /* shared key handling */
139 extern sctp_sharedkey_t *sctp_alloc_sharedkey(void);
140 extern void sctp_free_sharedkey(sctp_sharedkey_t *skey);
141 extern sctp_sharedkey_t *
142 sctp_find_sharedkey(struct sctp_keyhead *shared_keys,
145 sctp_insert_sharedkey(struct sctp_keyhead *shared_keys,
146 sctp_sharedkey_t *new_skey);
148 sctp_copy_skeylist(const struct sctp_keyhead *src,
149 struct sctp_keyhead *dest);
151 /* ref counts on shared keys, by key id */
152 extern void sctp_auth_key_acquire(struct sctp_tcb *stcb, uint16_t keyid);
154 sctp_auth_key_release(struct sctp_tcb *stcb, uint16_t keyid,
158 /* hmac list handling */
159 extern sctp_hmaclist_t *sctp_alloc_hmaclist(uint16_t num_hmacs);
160 extern void sctp_free_hmaclist(sctp_hmaclist_t *list);
161 extern int sctp_auth_add_hmacid(sctp_hmaclist_t *list, uint16_t hmac_id);
162 extern sctp_hmaclist_t *sctp_copy_hmaclist(sctp_hmaclist_t *list);
163 extern sctp_hmaclist_t *sctp_default_supported_hmaclist(void);
165 sctp_negotiate_hmacid(sctp_hmaclist_t *peer,
166 sctp_hmaclist_t *local);
167 extern int sctp_serialize_hmaclist(sctp_hmaclist_t *list, uint8_t *ptr);
169 sctp_verify_hmac_param(struct sctp_auth_hmac_algo *hmacs,
172 extern sctp_authinfo_t *sctp_alloc_authinfo(void);
173 extern void sctp_free_authinfo(sctp_authinfo_t *authinfo);
175 /* keyed-HMAC functions */
176 extern uint32_t sctp_get_auth_chunk_len(uint16_t hmac_algo);
177 extern uint32_t sctp_get_hmac_digest_len(uint16_t hmac_algo);
179 sctp_hmac(uint16_t hmac_algo, uint8_t *key, uint32_t keylen,
180 uint8_t *text, uint32_t textlen, uint8_t *digest);
182 sctp_compute_hmac(uint16_t hmac_algo, sctp_key_t *key,
183 uint8_t *text, uint32_t textlen, uint8_t *digest);
184 extern int sctp_auth_is_supported_hmac(sctp_hmaclist_t *list, uint16_t id);
188 sctp_hmac_m(uint16_t hmac_algo, uint8_t *key, uint32_t keylen,
189 struct mbuf *m, uint32_t m_offset, uint8_t *digest, uint32_t trailer);
191 sctp_compute_hmac_m(uint16_t hmac_algo, sctp_key_t *key,
192 struct mbuf *m, uint32_t m_offset, uint8_t *digest);
195 * authentication routines
197 extern void sctp_clear_cachedkeys(struct sctp_tcb *stcb, uint16_t keyid);
198 extern void sctp_clear_cachedkeys_ep(struct sctp_inpcb *inp, uint16_t keyid);
199 extern int sctp_delete_sharedkey(struct sctp_tcb *stcb, uint16_t keyid);
200 extern int sctp_delete_sharedkey_ep(struct sctp_inpcb *inp, uint16_t keyid);
201 extern int sctp_auth_setactivekey(struct sctp_tcb *stcb, uint16_t keyid);
202 extern int sctp_auth_setactivekey_ep(struct sctp_inpcb *inp, uint16_t keyid);
203 extern int sctp_deact_sharedkey(struct sctp_tcb *stcb, uint16_t keyid);
204 extern int sctp_deact_sharedkey_ep(struct sctp_inpcb *inp, uint16_t keyid);
207 sctp_auth_get_cookie_params(struct sctp_tcb *stcb, struct mbuf *m,
208 uint32_t offset, uint32_t length);
210 sctp_fill_hmac_digest_m(struct mbuf *m, uint32_t auth_offset,
211 struct sctp_auth_chunk *auth, struct sctp_tcb *stcb, uint16_t key_id);
213 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
214 struct sctp_auth_chunk **auth_ret, uint32_t *offset,
215 struct sctp_tcb *stcb, uint8_t chunk);
217 sctp_handle_auth(struct sctp_tcb *stcb, struct sctp_auth_chunk *ch,
218 struct mbuf *m, uint32_t offset);
220 sctp_notify_authentication(struct sctp_tcb *stcb,
221 uint32_t indication, uint16_t keyid, uint16_t alt_keyid, int so_locked);
223 sctp_validate_init_auth_params(struct mbuf *m, int offset,
226 sctp_initialize_auth_params(struct sctp_inpcb *inp,
227 struct sctp_tcb *stcb);
230 #endif /* __SCTP_AUTH_H__ */