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Phoebe Buckheister5d637d52014-05-16 17:46:37 +02001/*
2 * Copyright (C) 2014 Fraunhofer ITWM
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2
6 * as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * Written by:
14 * Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
15 */
16
17#ifndef MAC802154_LLSEC_H
18#define MAC802154_LLSEC_H
19
20#include <linux/slab.h>
21#include <linux/hashtable.h>
22#include <linux/crypto.h>
23#include <linux/kref.h>
24#include <linux/spinlock.h>
25#include <net/af_ieee802154.h>
26#include <net/ieee802154_netdev.h>
27
28struct mac802154_llsec_key {
29 struct ieee802154_llsec_key key;
30
31 /* one tfm for each authsize (4/8/16) */
32 struct crypto_aead *tfm[3];
33 struct crypto_blkcipher *tfm0;
34
35 struct kref ref;
36};
37
38struct mac802154_llsec_device_key {
39 struct ieee802154_llsec_device_key devkey;
40
41 struct rcu_head rcu;
42};
43
44struct mac802154_llsec_device {
45 struct ieee802154_llsec_device dev;
46
47 struct hlist_node bucket_s;
48 struct hlist_node bucket_hw;
49
50 /* protects dev.frame_counter and the elements of dev.keys */
51 spinlock_t lock;
52
53 struct rcu_head rcu;
54};
55
56struct mac802154_llsec_seclevel {
57 struct ieee802154_llsec_seclevel level;
58
59 struct rcu_head rcu;
60};
61
62struct mac802154_llsec {
63 struct ieee802154_llsec_params params;
64 struct ieee802154_llsec_table table;
65
66 DECLARE_HASHTABLE(devices_short, 6);
67 DECLARE_HASHTABLE(devices_hw, 6);
68
69 /* protects params, all other fields are fine with RCU */
70 rwlock_t lock;
71};
72
73void mac802154_llsec_init(struct mac802154_llsec *sec);
74void mac802154_llsec_destroy(struct mac802154_llsec *sec);
75
76int mac802154_llsec_get_params(struct mac802154_llsec *sec,
77 struct ieee802154_llsec_params *params);
78int mac802154_llsec_set_params(struct mac802154_llsec *sec,
79 const struct ieee802154_llsec_params *params,
80 int changed);
81
82int mac802154_llsec_key_add(struct mac802154_llsec *sec,
83 const struct ieee802154_llsec_key_id *id,
84 const struct ieee802154_llsec_key *key);
85int mac802154_llsec_key_del(struct mac802154_llsec *sec,
86 const struct ieee802154_llsec_key_id *key);
87
88int mac802154_llsec_dev_add(struct mac802154_llsec *sec,
89 const struct ieee802154_llsec_device *dev);
90int mac802154_llsec_dev_del(struct mac802154_llsec *sec,
91 __le64 device_addr);
92
93int mac802154_llsec_devkey_add(struct mac802154_llsec *sec,
94 __le64 dev_addr,
95 const struct ieee802154_llsec_device_key *key);
96int mac802154_llsec_devkey_del(struct mac802154_llsec *sec,
97 __le64 dev_addr,
98 const struct ieee802154_llsec_device_key *key);
99
100int mac802154_llsec_seclevel_add(struct mac802154_llsec *sec,
101 const struct ieee802154_llsec_seclevel *sl);
102int mac802154_llsec_seclevel_del(struct mac802154_llsec *sec,
103 const struct ieee802154_llsec_seclevel *sl);
104
Phoebe Buckheister03556e42014-05-16 17:46:38 +0200105int mac802154_llsec_encrypt(struct mac802154_llsec *sec, struct sk_buff *skb);
Phoebe Buckheister4c14a2f2014-05-16 17:46:39 +0200106int mac802154_llsec_decrypt(struct mac802154_llsec *sec, struct sk_buff *skb);
Phoebe Buckheister03556e42014-05-16 17:46:38 +0200107
Phoebe Buckheister5d637d52014-05-16 17:46:37 +0200108#endif /* MAC802154_LLSEC_H */