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authorVlad Yasevich <vladislav.yasevich@hp.com>2007-10-09 04:15:59 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 19:51:29 -0400
commit1f485649f52929d9937b346a920a522a7363e202 (patch)
tree663ac69ba7fff641e243306d7aad5b95378e4d6d /include/net/sctp/auth.h
parentf7b0e93ba1a484700bd1b0e36bdaddaf4eb51b0b (diff)
[SCTP]: Implement SCTP-AUTH internals
This patch implements the internals operations of the AUTH, such as key computation and storage. It also adds necessary variables to the SCTP data structures. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/sctp/auth.h')
-rw-r--r--include/net/sctp/auth.h112
1 files changed, 112 insertions, 0 deletions
diff --git a/include/net/sctp/auth.h b/include/net/sctp/auth.h
new file mode 100644
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+++ b/include/net/sctp/auth.h
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1/* SCTP kernel reference Implementation
2 * (C) Copyright 2007 Hewlett-Packard Development Company, L.P.
3 *
4 * This file is part of the SCTP kernel reference Implementation
5 *
6 * The SCTP reference implementation is free software;
7 * you can redistribute it and/or modify it under the terms of
8 * the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * The SCTP reference implementation is distributed in the hope that it
13 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
14 * ************************
15 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16 * See the GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with GNU CC; see the file COPYING. If not, write to
20 * the Free Software Foundation, 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
22 *
23 * Please send any bug reports or fixes you make to the
24 * email address(es):
25 * lksctp developers <lksctp-developers@lists.sourceforge.net>
26 *
27 * Or submit a bug report through the following website:
28 * http://www.sf.net/projects/lksctp
29 *
30 * Written or modified by:
31 * Vlad Yasevich <vladislav.yasevich@hp.com>
32 *
33 * Any bugs reported given to us we will try to fix... any fixes shared will
34 * be incorporated into the next SCTP release.
35 */
36
37#ifndef __sctp_auth_h__
38#define __sctp_auth_h__
39
40#include <linux/list.h>
41#include <linux/crypto.h>
42
43struct sctp_endpoint;
44struct sctp_association;
45struct sctp_authkey;
46
47/*
48 * Define a generic struct that will hold all the info
49 * necessary for an HMAC transform
50 */
51struct sctp_hmac {
52 __u16 hmac_id; /* one of the above ids */
53 char *hmac_name; /* name for loading */
54 __u16 hmac_len; /* length of the signature */
55};
56
57/* This is generic structure that containst authentication bytes used
58 * as keying material. It's a what is referred to as byte-vector all
59 * over SCTP-AUTH
60 */
61struct sctp_auth_bytes {
62 atomic_t refcnt;
63 __u32 len;
64 __u8 data[];
65};
66
67/* Definition for a shared key, weather endpoint or association */
68struct sctp_shared_key {
69 struct list_head key_list;
70 __u16 key_id;
71 struct sctp_auth_bytes *key;
72};
73
74#define key_for_each(__key, __list_head) \
75 list_for_each_entry(__key, __list_head, key_list)
76
77#define key_for_each_safe(__key, __tmp, __list_head) \
78 list_for_each_entry_safe(__key, __tmp, __list_head, key_list)
79
80static inline void sctp_auth_key_hold(struct sctp_auth_bytes *key)
81{
82 if (!key)
83 return;
84
85 atomic_inc(&key->refcnt);
86}
87
88void sctp_auth_key_put(struct sctp_auth_bytes *key);
89struct sctp_shared_key *sctp_auth_shkey_create(__u16 key_id, gfp_t gfp);
90void sctp_auth_shkey_free(struct sctp_shared_key *sh_key);
91void sctp_auth_destroy_keys(struct list_head *keys);
92int sctp_auth_asoc_init_active_key(struct sctp_association *asoc, gfp_t gfp);
93struct sctp_shared_key *sctp_auth_get_shkey(
94 const struct sctp_association *asoc,
95 __u16 key_id);
96int sctp_auth_asoc_copy_shkeys(const struct sctp_endpoint *ep,
97 struct sctp_association *asoc,
98 gfp_t gfp);
99int sctp_auth_init_hmacs(struct sctp_endpoint *ep, gfp_t gfp);
100void sctp_auth_destroy_hmacs(struct crypto_hash *auth_hmacs[]);
101struct sctp_hmac *sctp_auth_get_hmac(__u16 hmac_id);
102struct sctp_hmac *sctp_auth_asoc_get_hmac(const struct sctp_association *asoc);
103void sctp_auth_asoc_set_default_hmac(struct sctp_association *asoc,
104 struct sctp_hmac_algo_param *hmacs);
105int sctp_auth_asoc_verify_hmac_id(const struct sctp_association *asoc,
106 __u16 hmac_id);
107int sctp_auth_send_cid(sctp_cid_t chunk, const struct sctp_association *asoc);
108int sctp_auth_recv_cid(sctp_cid_t chunk, const struct sctp_association *asoc);
109void sctp_auth_calculate_hmac(const struct sctp_association *asoc,
110 struct sk_buff *skb,
111 struct sctp_auth_chunk *auth, gfp_t gfp);
112#endif