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.
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20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #ifndef _NETINET_SCTP_AUTH_H_
37 #define _NETINET_SCTP_AUTH_H_
41 #define SCTP_AUTH_DIGEST_LEN_SHA1 20
42 #define SCTP_AUTH_DIGEST_LEN_SHA224 28
43 #define SCTP_AUTH_DIGEST_LEN_SHA256 32
44 #define SCTP_AUTH_DIGEST_LEN_SHA384 48
45 #define SCTP_AUTH_DIGEST_LEN_SHA512 64
46 #define SCTP_AUTH_DIGEST_LEN_MAX 64
49 #define SCTP_AUTH_RANDOM_SIZE_DEFAULT 32
50 #define SCTP_AUTH_RANDOM_SIZE_REQUIRED 32
51 #define SCTP_AUTH_RANDOM_SIZE_MAX 256
53 /* union of all supported HMAC algorithm contexts */
54 typedef union sctp_hash_context {
61 } sctp_hash_context_t;
63 typedef struct sctp_key {
68 typedef struct sctp_shared_key {
69 LIST_ENTRY(sctp_shared_key) next;
70 sctp_key_t *key; /* key text */
71 uint32_t refcount; /* reference count */
72 uint16_t keyid; /* shared key ID */
73 uint8_t deactivated; /* key is deactivated */
76 LIST_HEAD(sctp_keyhead, sctp_shared_key);
78 /* authentication chunks list */
79 typedef struct sctp_auth_chklist {
82 } sctp_auth_chklist_t;
84 /* hmac algos supported list */
85 typedef struct sctp_hmaclist {
86 uint16_t max_algo; /* max algorithms allocated */
87 uint16_t num_algo; /* num algorithms used */
91 /* authentication info */
92 typedef struct sctp_authinformation {
93 sctp_key_t *random; /* local random key (concatenated) */
94 uint32_t random_len; /* local random number length for param */
95 sctp_key_t *peer_random;/* peer's random key (concatenated) */
96 sctp_key_t *assoc_key; /* cached concatenated send key */
97 sctp_key_t *recv_key; /* cached concatenated recv key */
98 uint16_t active_keyid; /* active send keyid */
99 uint16_t assoc_keyid; /* current send keyid (cached) */
100 uint16_t recv_keyid; /* last recv keyid (cached) */
108 #define sctp_auth_is_required_chunk(chunk, list) ((list == NULL) ? (0) : (list->chunks[chunk] != 0))
111 * function prototypes
114 /* socket option api functions */
115 extern sctp_auth_chklist_t *sctp_alloc_chunklist(void);
116 extern void sctp_free_chunklist(sctp_auth_chklist_t * chklist);
117 extern void sctp_clear_chunklist(sctp_auth_chklist_t * chklist);
118 extern sctp_auth_chklist_t *sctp_copy_chunklist(sctp_auth_chklist_t * chklist);
119 extern int sctp_auth_add_chunk(uint8_t chunk, sctp_auth_chklist_t * list);
120 extern int sctp_auth_delete_chunk(uint8_t chunk, sctp_auth_chklist_t * list);
121 extern size_t sctp_auth_get_chklist_size(const sctp_auth_chklist_t * list);
122 extern void sctp_auth_set_default_chunks(sctp_auth_chklist_t * list);
124 sctp_serialize_auth_chunks(const sctp_auth_chklist_t * list,
127 sctp_pack_auth_chunks(const sctp_auth_chklist_t * list,
130 sctp_unpack_auth_chunks(const uint8_t * ptr, uint8_t num_chunks,
131 sctp_auth_chklist_t * list);
134 extern sctp_key_t *sctp_alloc_key(uint32_t keylen);
135 extern void sctp_free_key(sctp_key_t * key);
136 extern void sctp_print_key(sctp_key_t * key, const char *str);
137 extern void sctp_show_key(sctp_key_t * key, const char *str);
138 extern sctp_key_t *sctp_generate_random_key(uint32_t keylen);
139 extern sctp_key_t *sctp_set_key(uint8_t * key, uint32_t keylen);
141 sctp_compute_hashkey(sctp_key_t * key1, sctp_key_t * key2,
142 sctp_key_t * shared);
144 /* shared key handling */
145 extern sctp_sharedkey_t *sctp_alloc_sharedkey(void);
146 extern void sctp_free_sharedkey(sctp_sharedkey_t * skey);
147 extern sctp_sharedkey_t *
148 sctp_find_sharedkey(struct sctp_keyhead *shared_keys,
151 sctp_insert_sharedkey(struct sctp_keyhead *shared_keys,
152 sctp_sharedkey_t * new_skey);
154 sctp_copy_skeylist(const struct sctp_keyhead *src,
155 struct sctp_keyhead *dest);
157 /* ref counts on shared keys, by key id */
158 extern void sctp_auth_key_acquire(struct sctp_tcb *stcb, uint16_t keyid);
160 sctp_auth_key_release(struct sctp_tcb *stcb, uint16_t keyid,
164 /* hmac list handling */
165 extern sctp_hmaclist_t *sctp_alloc_hmaclist(uint8_t num_hmacs);
166 extern void sctp_free_hmaclist(sctp_hmaclist_t * list);
167 extern int sctp_auth_add_hmacid(sctp_hmaclist_t * list, uint16_t hmac_id);
168 extern sctp_hmaclist_t *sctp_copy_hmaclist(sctp_hmaclist_t * list);
169 extern sctp_hmaclist_t *sctp_default_supported_hmaclist(void);
171 sctp_negotiate_hmacid(sctp_hmaclist_t * peer,
172 sctp_hmaclist_t * local);
173 extern int sctp_serialize_hmaclist(sctp_hmaclist_t * list, uint8_t * ptr);
175 sctp_verify_hmac_param(struct sctp_auth_hmac_algo *hmacs,
178 extern sctp_authinfo_t *sctp_alloc_authinfo(void);
179 extern void sctp_free_authinfo(sctp_authinfo_t * authinfo);
181 /* keyed-HMAC functions */
182 extern uint32_t sctp_get_auth_chunk_len(uint16_t hmac_algo);
183 extern uint32_t sctp_get_hmac_digest_len(uint16_t hmac_algo);
185 sctp_hmac(uint16_t hmac_algo, uint8_t * key, uint32_t keylen,
186 uint8_t * text, uint32_t textlen, uint8_t * digest);
188 sctp_verify_hmac(uint16_t hmac_algo, uint8_t * key, uint32_t keylen,
189 uint8_t * text, uint32_t textlen, uint8_t * digest, uint32_t digestlen);
191 sctp_compute_hmac(uint16_t hmac_algo, sctp_key_t * key,
192 uint8_t * text, uint32_t textlen, uint8_t * digest);
193 extern int sctp_auth_is_supported_hmac(sctp_hmaclist_t * list, uint16_t id);
197 sctp_hmac_m(uint16_t hmac_algo, uint8_t * key, uint32_t keylen,
198 struct mbuf *m, uint32_t m_offset, uint8_t * digest, uint32_t trailer);
200 sctp_compute_hmac_m(uint16_t hmac_algo, sctp_key_t * key,
201 struct mbuf *m, uint32_t m_offset, uint8_t * digest);
204 * authentication routines
206 extern void sctp_clear_cachedkeys(struct sctp_tcb *stcb, uint16_t keyid);
207 extern void sctp_clear_cachedkeys_ep(struct sctp_inpcb *inp, uint16_t keyid);
208 extern int sctp_delete_sharedkey(struct sctp_tcb *stcb, uint16_t keyid);
209 extern int sctp_delete_sharedkey_ep(struct sctp_inpcb *inp, uint16_t keyid);
210 extern int sctp_auth_setactivekey(struct sctp_tcb *stcb, uint16_t keyid);
211 extern int sctp_auth_setactivekey_ep(struct sctp_inpcb *inp, uint16_t keyid);
212 extern int sctp_deact_sharedkey(struct sctp_tcb *stcb, uint16_t keyid);
213 extern int sctp_deact_sharedkey_ep(struct sctp_inpcb *inp, uint16_t keyid);
216 sctp_auth_get_cookie_params(struct sctp_tcb *stcb, struct mbuf *m,
217 uint32_t offset, uint32_t length);
219 sctp_fill_hmac_digest_m(struct mbuf *m, uint32_t auth_offset,
220 struct sctp_auth_chunk *auth, struct sctp_tcb *stcb, uint16_t key_id);
222 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
223 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
224 struct sctp_tcb *stcb, uint8_t chunk);
226 sctp_handle_auth(struct sctp_tcb *stcb, struct sctp_auth_chunk *ch,
227 struct mbuf *m, uint32_t offset);
229 sctp_notify_authentication(struct sctp_tcb *stcb,
230 uint32_t indication, uint16_t keyid, uint16_t alt_keyid, int so_locked);
232 sctp_validate_init_auth_params(struct mbuf *m, int offset,
235 sctp_initialize_auth_params(struct sctp_inpcb *inp,
236 struct sctp_tcb *stcb);
239 #endif /* __SCTP_AUTH_H__ */