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Diffstat (limited to 'include/net/sctp/auth.h')
| -rw-r--r-- | include/net/sctp/auth.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/include/net/sctp/auth.h b/include/net/sctp/auth.h new file mode 100644 index 000000000..687e7f800 --- /dev/null +++ b/include/net/sctp/auth.h @@ -0,0 +1,126 @@ +/* SCTP kernel implementation + * (C) Copyright 2007 Hewlett-Packard Development Company, L.P. + * + * This file is part of the SCTP kernel implementation + * + * This SCTP implementation is free software; + * you can redistribute it and/or modify it under the terms of + * the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This SCTP implementation is distributed in the hope that it + * will be useful, but WITHOUT ANY WARRANTY; without even the implied + * ************************ + * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU CC; see the file COPYING. If not, see + * <http://www.gnu.org/licenses/>. + * + * Please send any bug reports or fixes you make to the + * email address(es): + * lksctp developers <linux-sctp@vger.kernel.org> + * + * Written or modified by: + * Vlad Yasevich <vladislav.yasevich@hp.com> + */ + +#ifndef __sctp_auth_h__ +#define __sctp_auth_h__ + +#include <linux/list.h> +#include <linux/refcount.h> + +struct sctp_endpoint; +struct sctp_association; +struct sctp_authkey; +struct sctp_hmacalgo; +struct crypto_shash; + +/* + * Define a generic struct that will hold all the info + * necessary for an HMAC transform + */ +struct sctp_hmac { + __u16 hmac_id; /* one of the above ids */ + char *hmac_name; /* name for loading */ + __u16 hmac_len; /* length of the signature */ +}; + +/* This is generic structure that containst authentication bytes used + * as keying material. It's a what is referred to as byte-vector all + * over SCTP-AUTH + */ +struct sctp_auth_bytes { + refcount_t refcnt; + __u32 len; + __u8 data[]; +}; + +/* Definition for a shared key, weather endpoint or association */ +struct sctp_shared_key { + struct list_head key_list; + struct sctp_auth_bytes *key; + refcount_t refcnt; + __u16 key_id; + __u8 deactivated; +}; + +#define key_for_each(__key, __list_head) \ + list_for_each_entry(__key, __list_head, key_list) + +#define key_for_each_safe(__key, __tmp, __list_head) \ + list_for_each_entry_safe(__key, __tmp, __list_head, key_list) + +static inline void sctp_auth_key_hold(struct sctp_auth_bytes *key) +{ + if (!key) + return; + + refcount_inc(&key->refcnt); +} + +void sctp_auth_key_put(struct sctp_auth_bytes *key); +struct sctp_shared_key *sctp_auth_shkey_create(__u16 key_id, gfp_t gfp); +void sctp_auth_destroy_keys(struct list_head *keys); +int sctp_auth_asoc_init_active_key(struct sctp_association *asoc, gfp_t gfp); +struct sctp_shared_key *sctp_auth_get_shkey( + const struct sctp_association *asoc, + __u16 key_id); +int sctp_auth_asoc_copy_shkeys(const struct sctp_endpoint *ep, + struct sctp_association *asoc, + gfp_t gfp); +int sctp_auth_init_hmacs(struct sctp_endpoint *ep, gfp_t gfp); +void sctp_auth_destroy_hmacs(struct crypto_shash *auth_hmacs[]); +struct sctp_hmac *sctp_auth_get_hmac(__u16 hmac_id); +struct sctp_hmac *sctp_auth_asoc_get_hmac(const struct sctp_association *asoc); +void sctp_auth_asoc_set_default_hmac(struct sctp_association *asoc, + struct sctp_hmac_algo_param *hmacs); +int sctp_auth_asoc_verify_hmac_id(const struct sctp_association *asoc, + __be16 hmac_id); +int sctp_auth_send_cid(enum sctp_cid chunk, + const struct sctp_association *asoc); +int sctp_auth_recv_cid(enum sctp_cid chunk, + const struct sctp_association *asoc); +void sctp_auth_calculate_hmac(const struct sctp_association *asoc, + struct sk_buff *skb, struct sctp_auth_chunk *auth, + struct sctp_shared_key *ep_key, gfp_t gfp); +void sctp_auth_shkey_release(struct sctp_shared_key *sh_key); +void sctp_auth_shkey_hold(struct sctp_shared_key *sh_key); + +/* API Helpers */ +int sctp_auth_ep_add_chunkid(struct sctp_endpoint *ep, __u8 chunk_id); +int sctp_auth_ep_set_hmacs(struct sctp_endpoint *ep, + struct sctp_hmacalgo *hmacs); +int sctp_auth_set_key(struct sctp_endpoint *ep, struct sctp_association *asoc, + struct sctp_authkey *auth_key); +int sctp_auth_set_active_key(struct sctp_endpoint *ep, + struct sctp_association *asoc, __u16 key_id); +int sctp_auth_del_key_id(struct sctp_endpoint *ep, + struct sctp_association *asoc, __u16 key_id); +int sctp_auth_deact_key_id(struct sctp_endpoint *ep, + struct sctp_association *asoc, __u16 key_id); + +#endif |