key.h
3.95 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
/*
* Copyright 2002-2004, Instant802 Networks, Inc.
* Copyright 2005, Devicescape Software, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef IEEE80211_KEY_H
#define IEEE80211_KEY_H
#include <linux/types.h>
#include <linux/list.h>
#include <linux/crypto.h>
#include <linux/rcupdate.h>
#include <net/mac80211.h>
#define NUM_DEFAULT_KEYS 4
#define NUM_DEFAULT_MGMT_KEYS 2
#define MAX_PN_LEN 16
struct ieee80211_local;
struct ieee80211_sub_if_data;
struct sta_info;
/**
* enum ieee80211_internal_key_flags - internal key flags
*
* @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
* in the hardware for TX crypto hardware acceleration.
* @KEY_FLAG_TAINTED: Key is tainted and packets should be dropped.
*/
enum ieee80211_internal_key_flags {
KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0),
KEY_FLAG_TAINTED = BIT(1),
};
enum ieee80211_internal_tkip_state {
TKIP_STATE_NOT_INIT,
TKIP_STATE_PHASE1_DONE,
TKIP_STATE_PHASE1_HW_UPLOADED,
};
struct tkip_ctx {
u32 iv32; /* current iv32 */
u16 iv16; /* current iv16 */
u16 p1k[5]; /* p1k cache */
u32 p1k_iv32; /* iv32 for which p1k computed */
enum ieee80211_internal_tkip_state state;
};
struct ieee80211_key {
struct ieee80211_local *local;
struct ieee80211_sub_if_data *sdata;
struct sta_info *sta;
/* for sdata list */
struct list_head list;
/* protected by key mutex */
unsigned int flags;
union {
struct {
/* protects tx context */
spinlock_t txlock;
/* last used TSC */
struct tkip_ctx tx;
/* last received RSC */
struct tkip_ctx rx[IEEE80211_NUM_TIDS];
/* number of mic failures */
u32 mic_failures;
} tkip;
struct {
atomic64_t tx_pn;
/*
* Last received packet number. The first
* IEEE80211_NUM_TIDS counters are used with Data
* frames and the last counter is used with Robust
* Management frames.
*/
u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_CCMP_PN_LEN];
struct crypto_aead *tfm;
u32 replays; /* dot11RSNAStatsCCMPReplays */
} ccmp;
struct {
atomic64_t tx_pn;
u8 rx_pn[IEEE80211_CMAC_PN_LEN];
struct crypto_cipher *tfm;
u32 replays; /* dot11RSNAStatsCMACReplays */
u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
} aes_cmac;
struct {
/* generic cipher scheme */
u8 rx_pn[IEEE80211_NUM_TIDS + 1][MAX_PN_LEN];
} gen;
} u;
/* number of times this key has been used */
int tx_rx_count;
#ifdef CONFIG_MAC80211_DEBUGFS
struct {
struct dentry *stalink;
struct dentry *dir;
int cnt;
} debugfs;
#endif
/*
* key config, must be last because it contains key
* material as variable length member
*/
struct ieee80211_key_conf conf;
};
struct ieee80211_key *
ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
const u8 *key_data,
size_t seq_len, const u8 *seq,
const struct ieee80211_cipher_scheme *cs);
/*
* Insert a key into data structures (sdata, sta if necessary)
* to make it used, free old key. On failure, also free the new key.
*/
int ieee80211_key_link(struct ieee80211_key *key,
struct ieee80211_sub_if_data *sdata,
struct sta_info *sta);
void ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom);
void ieee80211_key_free_unused(struct ieee80211_key *key);
void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx,
bool uni, bool multi);
void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
int idx);
void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata,
bool force_synchronize);
void ieee80211_free_sta_keys(struct ieee80211_local *local,
struct sta_info *sta);
void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
#define key_mtx_dereference(local, ref) \
rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx)))
void ieee80211_delayed_tailroom_dec(struct work_struct *wk);
#endif /* IEEE80211_KEY_H */