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freebsd-skq/sys/netinet/sctp_auth.h
Randall Stewart 42551e993f - Sysctl's move to seperate file 
- moved away from ifn/ifa access to sctp_ifa/sctp_ifn
  built and managed by the add-ip code.
- cleaned up add-ip code to use the iterator
- made iterator be a thread, which enables auto-asconf now.
- rewrote and cleaned up source address selection (also
  made it use new structures).
- Fixed a couple of memory leaks.
- DACK now settable as to how many packets to delay as
  well as time.
- connectx() to latest socket API, new associd arg.
- Fixed issue with revoking and loosing potential to
  send when we inflate the flight size. We now inflate
  the cwnd too and deflate it later when the revoked
  chunk is sent or acked.
- Got rid of some temp debug code
- src addr selection moved to a common file (sctp_output.c)
- Support for simple VRF's (we have support for multi-vfr
  via compile switch that is scrubbed from BSD but we won't
  need multi-vrf until we first get VRF :-D)
- Rest of mib work for address information now done
- Limit number of addresses in INIT/INIT-ACK to
  a #def (30).

Reviewed by:	gnn
2007-03-15 11:27:14 +00:00

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/*-
* Copyright (c) 2001-2007, Cisco Systems, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* a) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* b) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the distribution.
*
* c) Neither the name of Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifndef __SCTP_AUTH_H__
#define __SCTP_AUTH_H__
/* digest lengths */
#define SCTP_AUTH_DIGEST_LEN_SHA1 20
#define SCTP_AUTH_DIGEST_LEN_MD5 16
#define SCTP_AUTH_DIGEST_LEN_SHA224 28
#define SCTP_AUTH_DIGEST_LEN_SHA256 32
#define SCTP_AUTH_DIGEST_LEN_SHA384 48
#define SCTP_AUTH_DIGEST_LEN_SHA512 64
#define SCTP_AUTH_DIGEST_LEN_MAX 64
/* random sizes */
#define SCTP_AUTH_RANDOM_SIZE_DEFAULT 32
#define SCTP_AUTH_RANDOM_SIZE_REQUIRED 32
#define SCTP_AUTH_RANDOM_SIZE_MAX 256
/* union of all supported HMAC algorithm contexts */
typedef union sctp_hash_context {
SHA1_CTX sha1;
MD5_CTX md5;
#ifdef HAVE_SHA2
SHA256_CTX sha256;
SHA384_CTX sha384;
SHA512_CTX sha512;
#endif
} sctp_hash_context_t;
typedef struct sctp_key {
uint32_t keylen;
uint8_t key[0];
} sctp_key_t;
typedef struct sctp_shared_key {
LIST_ENTRY(sctp_shared_key) next;
sctp_key_t *key; /* key text */
uint16_t keyid; /* shared key ID */
} sctp_sharedkey_t;
LIST_HEAD(sctp_keyhead, sctp_shared_key);
/* authentication chunks list */
typedef struct sctp_auth_chklist {
uint8_t chunks[256];
uint8_t num_chunks;
} sctp_auth_chklist_t;
/* hmac algos supported list */
typedef struct sctp_hmaclist {
uint16_t max_algo; /* max algorithms allocated */
uint16_t num_algo; /* num algorithms used */
uint16_t hmac[0];
} sctp_hmaclist_t;
/* authentication info */
typedef struct sctp_authinfo {
sctp_key_t *random; /* local random key (concatenated) */
uint32_t random_len; /* local random number length for param */
sctp_key_t *peer_random;/* peer's random key (concatenated) */
uint16_t assoc_keyid; /* current send keyid (cached) */
uint16_t recv_keyid; /* last recv keyid (cached) */
sctp_key_t *assoc_key; /* cached send key */
sctp_key_t *recv_key; /* cached recv key */
} sctp_authinfo_t;
/*
* Macros
*/
#define sctp_auth_is_required_chunk(chunk, list) ((list == NULL) ? (0) : (list->chunks[chunk] != 0))
/*
* function prototypes
*/
/* socket option api functions */
extern sctp_auth_chklist_t *sctp_alloc_chunklist(void);
extern void sctp_free_chunklist(sctp_auth_chklist_t * chklist);
extern void sctp_clear_chunklist(sctp_auth_chklist_t * chklist);
extern sctp_auth_chklist_t *sctp_copy_chunklist(sctp_auth_chklist_t * chklist);
extern int sctp_auth_add_chunk(uint8_t chunk, sctp_auth_chklist_t * list);
extern int sctp_auth_delete_chunk(uint8_t chunk, sctp_auth_chklist_t * list);
extern size_t sctp_auth_get_chklist_size(const sctp_auth_chklist_t * list);
extern void sctp_auth_set_default_chunks(sctp_auth_chklist_t * list);
extern int
sctp_serialize_auth_chunks(const sctp_auth_chklist_t * list, uint8_t * ptr);
extern int sctp_pack_auth_chunks(const sctp_auth_chklist_t * list, uint8_t * ptr);
extern int
sctp_unpack_auth_chunks(const uint8_t * ptr, uint8_t num_chunks,
sctp_auth_chklist_t * list);
/* key handling */
extern sctp_key_t *sctp_alloc_key(uint32_t keylen);
extern void sctp_free_key(sctp_key_t * key);
extern void sctp_print_key(sctp_key_t * key, const char *str);
extern void sctp_show_key(sctp_key_t * key, const char *str);
extern sctp_key_t *sctp_generate_random_key(uint32_t keylen);
extern sctp_key_t *sctp_set_key(uint8_t * key, uint32_t keylen);
extern sctp_key_t *
sctp_compute_hashkey(sctp_key_t * key1, sctp_key_t * key2,
sctp_key_t * shared);
/* shared key handling */
extern sctp_sharedkey_t *sctp_alloc_sharedkey(void);
extern void sctp_free_sharedkey(sctp_sharedkey_t * skey);
extern sctp_sharedkey_t *
sctp_find_sharedkey(struct sctp_keyhead *shared_keys, uint16_t key_id);
extern void
sctp_insert_sharedkey(struct sctp_keyhead *shared_keys,
sctp_sharedkey_t * new_skey);
extern int
sctp_copy_skeylist(const struct sctp_keyhead *src,
struct sctp_keyhead *dest);
/* hmac list handling */
extern sctp_hmaclist_t *sctp_alloc_hmaclist(uint8_t num_hmacs);
extern void sctp_free_hmaclist(sctp_hmaclist_t * list);
extern int sctp_auth_add_hmacid(sctp_hmaclist_t * list, uint16_t hmac_id);
extern sctp_hmaclist_t *sctp_copy_hmaclist(sctp_hmaclist_t * list);
extern sctp_hmaclist_t *sctp_default_supported_hmaclist(void);
extern uint16_t
sctp_negotiate_hmacid(sctp_hmaclist_t * peer,
sctp_hmaclist_t * local);
extern int sctp_serialize_hmaclist(sctp_hmaclist_t * list, uint8_t * ptr);
extern int
sctp_verify_hmac_param(struct sctp_auth_hmac_algo *hmacs,
uint32_t num_hmacs);
extern sctp_authinfo_t *sctp_alloc_authinfo(void);
extern void sctp_free_authinfo(sctp_authinfo_t * authinfo);
/* keyed-HMAC functions */
extern uint32_t sctp_get_auth_chunk_len(uint16_t hmac_algo);
extern uint32_t sctp_get_hmac_digest_len(uint16_t hmac_algo);
extern uint32_t
sctp_hmac(uint16_t hmac_algo, uint8_t * key, uint32_t keylen,
uint8_t * text, uint32_t textlen, uint8_t * digest);
extern int
sctp_verify_hmac(uint16_t hmac_algo, uint8_t * key, uint32_t keylen,
uint8_t * text, uint32_t textlen, uint8_t * digest,
uint32_t digestlen);
extern uint32_t
sctp_compute_hmac(uint16_t hmac_algo, sctp_key_t * key,
uint8_t * text, uint32_t textlen, uint8_t * digest);
extern int sctp_auth_is_supported_hmac(sctp_hmaclist_t * list, uint16_t id);
/* mbuf versions */
extern uint32_t
sctp_hmac_m(uint16_t hmac_algo, uint8_t * key, uint32_t keylen,
struct mbuf *m, uint32_t m_offset, uint8_t * digest);
extern uint32_t
sctp_compute_hmac_m(uint16_t hmac_algo, sctp_key_t * key, struct mbuf *m,
uint32_t m_offset, uint8_t * digest);
/*
* authentication routines
*/
extern void sctp_clear_cachedkeys(struct sctp_tcb *stcb, uint16_t keyid);
extern void sctp_clear_cachedkeys_ep(struct sctp_inpcb *inp, uint16_t keyid);
extern int sctp_delete_sharedkey(struct sctp_tcb *stcb, uint16_t keyid);
extern int sctp_delete_sharedkey_ep(struct sctp_inpcb *inp, uint16_t keyid);
extern int sctp_auth_setactivekey(struct sctp_tcb *stcb, uint16_t keyid);
extern int sctp_auth_setactivekey_ep(struct sctp_inpcb *inp, uint16_t keyid);
extern void
sctp_auth_get_cookie_params(struct sctp_tcb *stcb, struct mbuf *m,
uint32_t offset, uint32_t length);
extern void
sctp_fill_hmac_digest_m(struct mbuf *m, uint32_t auth_offset,
struct sctp_auth_chunk *auth,
struct sctp_tcb *stcb);
extern struct mbuf *
sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
struct sctp_auth_chunk **auth_ret,
uint32_t * offset, struct sctp_tcb *stcb,
uint8_t chunk);
extern int
sctp_handle_auth(struct sctp_tcb *stcb, struct sctp_auth_chunk *ch,
struct mbuf *m, uint32_t offset);
extern void
sctp_notify_authentication(struct sctp_tcb *stcb,
uint32_t indication, uint16_t keyid,
uint16_t alt_keyid);
extern int
sctp_validate_init_auth_params(struct mbuf *m, int offset, int limit);
extern void
sctp_initialize_auth_params(struct sctp_inpcb *inp, struct sctp_tcb *stcb);
/* test functions */
extern void sctp_test_hmac_sha1(void);
extern void sctp_test_hmac_md5(void);
extern void sctp_test_authkey(void);
#endif /* __SCTP_AUTH_H__ */
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