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| -rw-r--r-- | netwerk/sctp/src/netinet/sctp_auth.h | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/netwerk/sctp/src/netinet/sctp_auth.h b/netwerk/sctp/src/netinet/sctp_auth.h new file mode 100644 index 0000000000..718b2f5ba9 --- /dev/null +++ b/netwerk/sctp/src/netinet/sctp_auth.h @@ -0,0 +1,213 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. + * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. + * Copyright (c) 2008-2012, by Michael Tuexen. 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. + */ + +#if defined(__FreeBSD__) && !defined(__Userspace__) +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); +#endif + +#ifndef _NETINET_SCTP_AUTH_H_ +#define _NETINET_SCTP_AUTH_H_ + +#include <netinet/sctp_os.h> + +/* digest lengths */ +#define SCTP_AUTH_DIGEST_LEN_SHA1 20 +#define SCTP_AUTH_DIGEST_LEN_SHA256 32 +#define SCTP_AUTH_DIGEST_LEN_MAX SCTP_AUTH_DIGEST_LEN_SHA256 + +/* random sizes */ +#define SCTP_AUTH_RANDOM_SIZE_DEFAULT 32 +#define SCTP_AUTH_RANDOM_SIZE_REQUIRED 32 + +/* union of all supported HMAC algorithm contexts */ +typedef union sctp_hash_context { + SCTP_SHA1_CTX sha1; +#if defined(SCTP_SUPPORT_HMAC_SHA256) + SCTP_SHA256_CTX sha256; +#endif +} sctp_hash_context_t; + +typedef struct sctp_key { + uint32_t keylen; + uint8_t key[]; +} sctp_key_t; + +typedef struct sctp_shared_key { + LIST_ENTRY(sctp_shared_key) next; + sctp_key_t *key; /* key text */ + uint32_t refcount; /* reference count */ + uint16_t keyid; /* shared key ID */ + uint8_t deactivated; /* key is deactivated */ +} 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[]; +} sctp_hmaclist_t; + +/* authentication info */ +typedef struct sctp_authinformation { + 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) */ + sctp_key_t *assoc_key; /* cached concatenated send key */ + sctp_key_t *recv_key; /* cached concatenated recv key */ + uint16_t active_keyid; /* active send keyid */ + uint16_t assoc_keyid; /* current send keyid (cached) */ + uint16_t recv_keyid; /* last recv keyid (cached) */ +} 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 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 int 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); +/* ref counts on shared keys, by key id */ +extern void sctp_auth_key_acquire(struct sctp_tcb *stcb, uint16_t keyid); +extern void sctp_auth_key_release(struct sctp_tcb *stcb, uint16_t keyid, + int so_locked); + +/* hmac list handling */ +extern sctp_hmaclist_t *sctp_alloc_hmaclist(uint16_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 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, uint32_t trailer); +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 int sctp_deact_sharedkey(struct sctp_tcb *stcb, uint16_t keyid); +extern int sctp_deact_sharedkey_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, uint16_t key_id); +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, int so_locked); +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 */ +#ifdef SCTP_HMAC_TEST +extern void sctp_test_hmac_sha1(void); +extern void sctp_test_authkey(void); +#endif +#endif /* __SCTP_AUTH_H__ */ |