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. On failure, also free the new key.
134 int 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, bool delay_tailroom);
138 void ieee80211_key_free_unused(struct ieee80211_key *key);
139 void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx,
140 bool uni, bool multi);
141 void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
143 void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata);
144 void ieee80211_free_sta_keys(struct ieee80211_local *local,
145 struct sta_info *sta);
146 void ieee80211_enable_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 void ieee80211_delayed_tailroom_dec(struct work_struct *wk);
153 #endif /* IEEE80211_KEY_H */