2 * Copyright 2002-2004, Instant802 Networks, Inc.
3 * Copyright 2005, Devicescape Software, Inc.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
10 #ifndef IEEE80211_KEY_H
11 #define IEEE80211_KEY_H
13 #include <linux/types.h>
14 #include <linux/list.h>
15 #include <linux/crypto.h>
16 #include <linux/rcupdate.h>
17 #include <net/mac80211.h>
19 #define NUM_DEFAULT_KEYS 4
20 #define NUM_DEFAULT_MGMT_KEYS 2
22 struct ieee80211_local
;
23 struct ieee80211_sub_if_data
;
27 * enum ieee80211_internal_key_flags - internal key flags
29 * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
30 * in the hardware for TX crypto hardware acceleration.
31 * @KEY_FLAG_TAINTED: Key is tainted and packets should be dropped.
33 enum ieee80211_internal_key_flags
{
34 KEY_FLAG_UPLOADED_TO_HARDWARE
= BIT(0),
35 KEY_FLAG_TAINTED
= BIT(1),
38 enum ieee80211_internal_tkip_state
{
40 TKIP_STATE_PHASE1_DONE
,
41 TKIP_STATE_PHASE1_HW_UPLOADED
,
45 u32 iv32
; /* current iv32 */
46 u16 iv16
; /* current iv16 */
47 u16 p1k
[5]; /* p1k cache */
48 u32 p1k_iv32
; /* iv32 for which p1k computed */
49 enum ieee80211_internal_tkip_state state
;
52 struct ieee80211_key
{
53 struct ieee80211_local
*local
;
54 struct ieee80211_sub_if_data
*sdata
;
58 struct list_head list
;
60 /* protected by key mutex */
65 /* protects tx context */
71 /* last received RSC */
72 struct tkip_ctx rx
[IEEE80211_NUM_TIDS
];
74 /* number of mic failures */
80 * Last received packet number. The first
81 * IEEE80211_NUM_TIDS counters are used with Data
82 * frames and the last counter is used with Robust
85 u8 rx_pn
[IEEE80211_NUM_TIDS
+ 1][IEEE80211_CCMP_PN_LEN
];
86 struct crypto_aead
*tfm
;
87 u32 replays
; /* dot11RSNAStatsCCMPReplays */
91 u8 rx_pn
[IEEE80211_CMAC_PN_LEN
];
92 struct crypto_cipher
*tfm
;
93 u32 replays
; /* dot11RSNAStatsCMACReplays */
94 u32 icverrors
; /* dot11RSNAStatsCMACICVErrors */
98 /* number of times this key has been used */
101 #ifdef CONFIG_MAC80211_DEBUGFS
103 struct dentry
*stalink
;
110 * key config, must be last because it contains key
111 * material as variable length member
113 struct ieee80211_key_conf conf
;
116 struct ieee80211_key
*ieee80211_key_alloc(u32 cipher
, int idx
, size_t key_len
,
118 size_t seq_len
, const u8
*seq
);
120 * Insert a key into data structures (sdata, sta if necessary)
121 * to make it used, free old key. On failure, also free the new key.
123 int ieee80211_key_link(struct ieee80211_key
*key
,
124 struct ieee80211_sub_if_data
*sdata
,
125 struct sta_info
*sta
);
126 void ieee80211_key_free(struct ieee80211_key
*key
, bool delay_tailroom
);
127 void ieee80211_key_free_unused(struct ieee80211_key
*key
);
128 void ieee80211_set_default_key(struct ieee80211_sub_if_data
*sdata
, int idx
,
129 bool uni
, bool multi
);
130 void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data
*sdata
,
132 void ieee80211_free_keys(struct ieee80211_sub_if_data
*sdata
);
133 void ieee80211_free_sta_keys(struct ieee80211_local
*local
,
134 struct sta_info
*sta
);
135 void ieee80211_enable_keys(struct ieee80211_sub_if_data
*sdata
);
137 #define key_mtx_dereference(local, ref) \
138 rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx)))
140 void ieee80211_delayed_tailroom_dec(struct work_struct
*wk
);
142 #endif /* IEEE80211_KEY_H */