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60c778b2 | 1 | /* SCTP kernel implementation |
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2 | * (C) Copyright 2007 Hewlett-Packard Development Company, L.P. |
3 | * | |
60c778b2 | 4 | * This file is part of the SCTP kernel implementation |
1f485649 | 5 | * |
60c778b2 | 6 | * This SCTP implementation is free software; |
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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 | * | |
60c778b2 | 12 | * This SCTP implementation is distributed in the hope that it |
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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 | |
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19 | * along with GNU CC; see the file COPYING. If not, see |
20 | * <http://www.gnu.org/licenses/>. | |
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21 | * |
22 | * Please send any bug reports or fixes you make to the | |
23 | * email address(es): | |
91705c61 | 24 | * lksctp developers <linux-sctp@vger.kernel.org> |
1f485649 | 25 | * |
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26 | * Written or modified by: |
27 | * Vlad Yasevich <vladislav.yasevich@hp.com> | |
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28 | */ |
29 | ||
30 | #ifndef __sctp_auth_h__ | |
31 | #define __sctp_auth_h__ | |
32 | ||
33 | #include <linux/list.h> | |
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34 | |
35 | struct sctp_endpoint; | |
36 | struct sctp_association; | |
37 | struct sctp_authkey; | |
65b07e5d | 38 | struct sctp_hmacalgo; |
5821c769 | 39 | struct crypto_shash; |
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40 | |
41 | /* | |
42 | * Define a generic struct that will hold all the info | |
43 | * necessary for an HMAC transform | |
44 | */ | |
45 | struct sctp_hmac { | |
46 | __u16 hmac_id; /* one of the above ids */ | |
47 | char *hmac_name; /* name for loading */ | |
48 | __u16 hmac_len; /* length of the signature */ | |
49 | }; | |
50 | ||
51 | /* This is generic structure that containst authentication bytes used | |
52 | * as keying material. It's a what is referred to as byte-vector all | |
53 | * over SCTP-AUTH | |
54 | */ | |
55 | struct sctp_auth_bytes { | |
56 | atomic_t refcnt; | |
57 | __u32 len; | |
58 | __u8 data[]; | |
59 | }; | |
60 | ||
61 | /* Definition for a shared key, weather endpoint or association */ | |
62 | struct sctp_shared_key { | |
63 | struct list_head key_list; | |
64 | __u16 key_id; | |
65 | struct sctp_auth_bytes *key; | |
66 | }; | |
67 | ||
68 | #define key_for_each(__key, __list_head) \ | |
69 | list_for_each_entry(__key, __list_head, key_list) | |
70 | ||
71 | #define key_for_each_safe(__key, __tmp, __list_head) \ | |
72 | list_for_each_entry_safe(__key, __tmp, __list_head, key_list) | |
73 | ||
74 | static inline void sctp_auth_key_hold(struct sctp_auth_bytes *key) | |
75 | { | |
76 | if (!key) | |
77 | return; | |
78 | ||
79 | atomic_inc(&key->refcnt); | |
80 | } | |
81 | ||
82 | void sctp_auth_key_put(struct sctp_auth_bytes *key); | |
83 | struct sctp_shared_key *sctp_auth_shkey_create(__u16 key_id, gfp_t gfp); | |
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84 | void sctp_auth_destroy_keys(struct list_head *keys); |
85 | int sctp_auth_asoc_init_active_key(struct sctp_association *asoc, gfp_t gfp); | |
86 | struct sctp_shared_key *sctp_auth_get_shkey( | |
87 | const struct sctp_association *asoc, | |
88 | __u16 key_id); | |
89 | int sctp_auth_asoc_copy_shkeys(const struct sctp_endpoint *ep, | |
90 | struct sctp_association *asoc, | |
91 | gfp_t gfp); | |
92 | int sctp_auth_init_hmacs(struct sctp_endpoint *ep, gfp_t gfp); | |
5821c769 | 93 | void sctp_auth_destroy_hmacs(struct crypto_shash *auth_hmacs[]); |
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94 | struct sctp_hmac *sctp_auth_get_hmac(__u16 hmac_id); |
95 | struct sctp_hmac *sctp_auth_asoc_get_hmac(const struct sctp_association *asoc); | |
96 | void sctp_auth_asoc_set_default_hmac(struct sctp_association *asoc, | |
97 | struct sctp_hmac_algo_param *hmacs); | |
98 | int sctp_auth_asoc_verify_hmac_id(const struct sctp_association *asoc, | |
d06f6082 | 99 | __be16 hmac_id); |
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100 | int sctp_auth_send_cid(sctp_cid_t chunk, const struct sctp_association *asoc); |
101 | int sctp_auth_recv_cid(sctp_cid_t chunk, const struct sctp_association *asoc); | |
102 | void sctp_auth_calculate_hmac(const struct sctp_association *asoc, | |
103 | struct sk_buff *skb, | |
104 | struct sctp_auth_chunk *auth, gfp_t gfp); | |
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105 | |
106 | /* API Helpers */ | |
107 | int sctp_auth_ep_add_chunkid(struct sctp_endpoint *ep, __u8 chunk_id); | |
108 | int sctp_auth_ep_set_hmacs(struct sctp_endpoint *ep, | |
109 | struct sctp_hmacalgo *hmacs); | |
110 | int sctp_auth_set_key(struct sctp_endpoint *ep, | |
111 | struct sctp_association *asoc, | |
112 | struct sctp_authkey *auth_key); | |
113 | int sctp_auth_set_active_key(struct sctp_endpoint *ep, | |
114 | struct sctp_association *asoc, | |
115 | __u16 key_id); | |
116 | int sctp_auth_del_key_id(struct sctp_endpoint *ep, | |
117 | struct sctp_association *asoc, | |
118 | __u16 key_id); | |
119 | ||
1f485649 | 120 | #endif |