60c778b259
I was notified by Randy Stewart that lksctp claims to be "the reference implementation". First of all, "the refrence implementation" was the original implementation of SCTP in usersapce written ty Randy and a few others. Second, after looking at the definiton of 'reference implementation', we don't really meet the requirements. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
128 lines
4.3 KiB
C
128 lines
4.3 KiB
C
/* SCTP kernel implementation
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* (C) Copyright 2007 Hewlett-Packard Development Company, L.P.
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*
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* This file is part of the SCTP kernel implementation
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*
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* This SCTP implementation is free software;
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* you can redistribute it and/or modify it under the terms of
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* the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This SCTP implementation is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* ************************
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU CC; see the file COPYING. If not, write to
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* the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Please send any bug reports or fixes you make to the
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* email address(es):
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* lksctp developers <lksctp-developers@lists.sourceforge.net>
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*
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* Or submit a bug report through the following website:
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* http://www.sf.net/projects/lksctp
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*
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* Written or modified by:
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* Vlad Yasevich <vladislav.yasevich@hp.com>
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*
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* Any bugs reported given to us we will try to fix... any fixes shared will
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* be incorporated into the next SCTP release.
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*/
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#ifndef __sctp_auth_h__
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#define __sctp_auth_h__
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#include <linux/list.h>
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#include <linux/crypto.h>
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struct sctp_endpoint;
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struct sctp_association;
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struct sctp_authkey;
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struct sctp_hmacalgo;
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/*
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* Define a generic struct that will hold all the info
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* necessary for an HMAC transform
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*/
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struct sctp_hmac {
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__u16 hmac_id; /* one of the above ids */
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char *hmac_name; /* name for loading */
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__u16 hmac_len; /* length of the signature */
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};
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/* This is generic structure that containst authentication bytes used
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* as keying material. It's a what is referred to as byte-vector all
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* over SCTP-AUTH
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*/
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struct sctp_auth_bytes {
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atomic_t refcnt;
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__u32 len;
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__u8 data[];
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};
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/* Definition for a shared key, weather endpoint or association */
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struct sctp_shared_key {
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struct list_head key_list;
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__u16 key_id;
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struct sctp_auth_bytes *key;
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};
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#define key_for_each(__key, __list_head) \
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list_for_each_entry(__key, __list_head, key_list)
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#define key_for_each_safe(__key, __tmp, __list_head) \
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list_for_each_entry_safe(__key, __tmp, __list_head, key_list)
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static inline void sctp_auth_key_hold(struct sctp_auth_bytes *key)
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{
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if (!key)
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return;
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atomic_inc(&key->refcnt);
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}
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void sctp_auth_key_put(struct sctp_auth_bytes *key);
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struct sctp_shared_key *sctp_auth_shkey_create(__u16 key_id, gfp_t gfp);
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void sctp_auth_destroy_keys(struct list_head *keys);
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int sctp_auth_asoc_init_active_key(struct sctp_association *asoc, gfp_t gfp);
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struct sctp_shared_key *sctp_auth_get_shkey(
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const struct sctp_association *asoc,
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__u16 key_id);
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int sctp_auth_asoc_copy_shkeys(const struct sctp_endpoint *ep,
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struct sctp_association *asoc,
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gfp_t gfp);
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int sctp_auth_init_hmacs(struct sctp_endpoint *ep, gfp_t gfp);
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void sctp_auth_destroy_hmacs(struct crypto_hash *auth_hmacs[]);
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struct sctp_hmac *sctp_auth_get_hmac(__u16 hmac_id);
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struct sctp_hmac *sctp_auth_asoc_get_hmac(const struct sctp_association *asoc);
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void sctp_auth_asoc_set_default_hmac(struct sctp_association *asoc,
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struct sctp_hmac_algo_param *hmacs);
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int sctp_auth_asoc_verify_hmac_id(const struct sctp_association *asoc,
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__be16 hmac_id);
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int sctp_auth_send_cid(sctp_cid_t chunk, const struct sctp_association *asoc);
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int sctp_auth_recv_cid(sctp_cid_t chunk, const struct sctp_association *asoc);
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void sctp_auth_calculate_hmac(const struct sctp_association *asoc,
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struct sk_buff *skb,
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struct sctp_auth_chunk *auth, gfp_t gfp);
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/* API Helpers */
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int sctp_auth_ep_add_chunkid(struct sctp_endpoint *ep, __u8 chunk_id);
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int sctp_auth_ep_set_hmacs(struct sctp_endpoint *ep,
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struct sctp_hmacalgo *hmacs);
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int sctp_auth_set_key(struct sctp_endpoint *ep,
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struct sctp_association *asoc,
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struct sctp_authkey *auth_key);
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int sctp_auth_set_active_key(struct sctp_endpoint *ep,
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struct sctp_association *asoc,
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__u16 key_id);
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int sctp_auth_del_key_id(struct sctp_endpoint *ep,
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struct sctp_association *asoc,
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__u16 key_id);
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#endif
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