diff options
Diffstat (limited to 'sys/netinet/sctp_auth.h')
-rw-r--r-- | sys/netinet/sctp_auth.h | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/sys/netinet/sctp_auth.h b/sys/netinet/sctp_auth.h new file mode 100644 index 0000000..c6eb88a --- /dev/null +++ b/sys/netinet/sctp_auth.h @@ -0,0 +1,262 @@ +/*- + * Copyright (c) 2001-2006, 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("$FreeBSD$"); +#define HAVE_SHA2 + +#ifndef __SCTP_AUTH_H__ +#define __SCTP_AUTH_H__ + +#include <sys/queue.h> +#include <sys/mbuf.h> + +#ifdef USE_SCTP_SHA1 +#include <netinet/sctp_sha1.h> +#else +#include <crypto/sha1.h> +/* map standard crypto API names */ +#define SHA1_Init SHA1Init +#define SHA1_Update SHA1Update +#define SHA1_Final(x,y) SHA1Final((caddr_t)x, y) +#endif + +#if defined(HAVE_SHA2) +#include <crypto/sha2/sha2.h> +#endif + +#include <sys/md5.h> +/* map standard crypto API names */ +#define MD5_Init MD5Init +#define MD5_Update MD5Update +#define MD5_Final MD5Final + +/* 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; + + +/* + * global variables + */ +extern uint32_t sctp_asconf_auth_nochk; /* sysctl to disable ASCONF auth chk */ +extern uint32_t sctp_auth_disable; /* sysctl for temp feature interop */ +extern uint32_t sctp_auth_random_len; /* sysctl */ + +/* + * 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 int 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, + const uint8_t * text, uint32_t textlen, uint8_t * digest); +extern int +sctp_verify_hmac(uint16_t hmac_algo, uint8_t * key, uint32_t keylen, + const 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, + const 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__ */ |