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
24 #define ALG_CCMP_KEY_LEN 16
25 #define CCMP_HDR_LEN 8
26 #define CCMP_MIC_LEN 8
27 #define CCMP_TK_LEN 16
30 #define TKIP_ICV_LEN 4
33 struct ieee80211_local
;
34 struct ieee80211_sub_if_data
;
38 * enum ieee80211_internal_key_flags - internal key flags
40 * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
41 * in the hardware for TX crypto hardware acceleration.
42 * @KEY_FLAG_TAINTED: Key is tainted and packets should be dropped.
44 enum ieee80211_internal_key_flags
{
45 KEY_FLAG_UPLOADED_TO_HARDWARE
= BIT(0),
46 KEY_FLAG_TAINTED
= BIT(1),
49 enum ieee80211_internal_tkip_state
{
51 TKIP_STATE_PHASE1_DONE
,
52 TKIP_STATE_PHASE1_HW_UPLOADED
,
56 u32 iv32
; /* current iv32 */
57 u16 iv16
; /* current iv16 */
58 u16 p1k
[5]; /* p1k cache */
59 u32 p1k_iv32
; /* iv32 for which p1k computed */
60 enum ieee80211_internal_tkip_state state
;
63 struct ieee80211_key
{
64 struct ieee80211_local
*local
;
65 struct ieee80211_sub_if_data
*sdata
;
69 struct list_head list
;
71 /* protected by key mutex */
76 /* protects tx context */
82 /* last received RSC */
83 struct tkip_ctx rx
[IEEE80211_NUM_TIDS
];
85 /* number of mic failures */
91 * Last received packet number. The first
92 * IEEE80211_NUM_TIDS counters are used with Data
93 * frames and the last counter is used with Robust
96 u8 rx_pn
[IEEE80211_NUM_TIDS
+ 1][CCMP_PN_LEN
];
97 struct crypto_cipher
*tfm
;
98 u32 replays
; /* dot11RSNAStatsCCMPReplays */
102 u8 rx_pn
[CMAC_PN_LEN
];
103 struct crypto_cipher
*tfm
;
104 u32 replays
; /* dot11RSNAStatsCMACReplays */
105 u32 icverrors
; /* dot11RSNAStatsCMACICVErrors */
109 /* number of times this key has been used */
112 #ifdef CONFIG_MAC80211_DEBUGFS
114 struct dentry
*stalink
;
121 * key config, must be last because it contains key
122 * material as variable length member
124 struct ieee80211_key_conf conf
;
127 struct ieee80211_key
*ieee80211_key_alloc(u32 cipher
, int idx
, size_t key_len
,
129 size_t seq_len
, const u8
*seq
);
131 * Insert a key into data structures (sdata, sta if necessary)
132 * to make it used, free old key.
134 int __must_check
ieee80211_key_link(struct ieee80211_key
*key
,
135 struct ieee80211_sub_if_data
*sdata
,
136 struct sta_info
*sta
);
137 void __ieee80211_key_free(struct ieee80211_key
*key
);
138 void ieee80211_key_free(struct ieee80211_local
*local
,
139 struct ieee80211_key
*key
);
140 void ieee80211_set_default_key(struct ieee80211_sub_if_data
*sdata
, int idx
,
141 bool uni
, bool multi
);
142 void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data
*sdata
,
144 void ieee80211_free_keys(struct ieee80211_sub_if_data
*sdata
);
145 void ieee80211_enable_keys(struct ieee80211_sub_if_data
*sdata
);
146 void ieee80211_disable_keys(struct ieee80211_sub_if_data
*sdata
);
148 #define key_mtx_dereference(local, ref) \
149 rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx)))
151 #endif /* IEEE80211_KEY_H */