Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * Copyright 2002-2004, Instant802 Networks, Inc. | |
3 | * Copyright 2005, Devicescape Software, Inc. | |
4 | * | |
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. | |
8 | */ | |
9 | ||
10 | #ifndef IEEE80211_KEY_H | |
11 | #define IEEE80211_KEY_H | |
12 | ||
13 | #include <linux/types.h> | |
8f37171a | 14 | #include <linux/list.h> |
f0706e82 | 15 | #include <linux/crypto.h> |
db4d1169 | 16 | #include <linux/rcupdate.h> |
f0706e82 JB |
17 | #include <net/mac80211.h> |
18 | ||
e31b8213 JB |
19 | #define NUM_DEFAULT_KEYS 4 |
20 | #define NUM_DEFAULT_MGMT_KEYS 2 | |
2475b1cc | 21 | #define MAX_PN_LEN 16 |
e31b8213 | 22 | |
11a843b7 JB |
23 | struct ieee80211_local; |
24 | struct ieee80211_sub_if_data; | |
25 | struct sta_info; | |
26 | ||
db4d1169 JB |
27 | /** |
28 | * enum ieee80211_internal_key_flags - internal key flags | |
29 | * | |
30 | * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present | |
31 | * in the hardware for TX crypto hardware acceleration. | |
95acac61 | 32 | * @KEY_FLAG_TAINTED: Key is tainted and packets should be dropped. |
db4d1169 JB |
33 | */ |
34 | enum ieee80211_internal_key_flags { | |
35 | KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0), | |
95acac61 | 36 | KEY_FLAG_TAINTED = BIT(1), |
db4d1169 | 37 | }; |
11a843b7 | 38 | |
ca99861d | 39 | enum ieee80211_internal_tkip_state { |
40 | TKIP_STATE_NOT_INIT, | |
41 | TKIP_STATE_PHASE1_DONE, | |
42 | TKIP_STATE_PHASE1_HW_UPLOADED, | |
43 | }; | |
44 | ||
b0f76b33 | 45 | struct tkip_ctx { |
523b02ea JB |
46 | u32 iv32; /* current iv32 */ |
47 | u16 iv16; /* current iv16 */ | |
48 | u16 p1k[5]; /* p1k cache */ | |
49 | u32 p1k_iv32; /* iv32 for which p1k computed */ | |
ca99861d | 50 | enum ieee80211_internal_tkip_state state; |
b0f76b33 HH |
51 | }; |
52 | ||
f0706e82 | 53 | struct ieee80211_key { |
11a843b7 JB |
54 | struct ieee80211_local *local; |
55 | struct ieee80211_sub_if_data *sdata; | |
56 | struct sta_info *sta; | |
57 | ||
3b96766f | 58 | /* for sdata list */ |
11a843b7 JB |
59 | struct list_head list; |
60 | ||
ad0e2b5a | 61 | /* protected by key mutex */ |
11a843b7 JB |
62 | unsigned int flags; |
63 | ||
f0706e82 JB |
64 | union { |
65 | struct { | |
523b02ea JB |
66 | /* protects tx context */ |
67 | spinlock_t txlock; | |
68 | ||
f0706e82 | 69 | /* last used TSC */ |
b0f76b33 | 70 | struct tkip_ctx tx; |
f0706e82 JB |
71 | |
72 | /* last received RSC */ | |
5a306f58 | 73 | struct tkip_ctx rx[IEEE80211_NUM_TIDS]; |
b98ea058 S |
74 | |
75 | /* number of mic failures */ | |
76 | u32 mic_failures; | |
f0706e82 JB |
77 | } tkip; |
78 | struct { | |
aba83a0b | 79 | atomic64_t tx_pn; |
9190252c JM |
80 | /* |
81 | * Last received packet number. The first | |
5a306f58 | 82 | * IEEE80211_NUM_TIDS counters are used with Data |
9190252c JM |
83 | * frames and the last counter is used with Robust |
84 | * Management frames. | |
85 | */ | |
4325f6ca | 86 | u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_CCMP_PN_LEN]; |
7ec7c4a9 | 87 | struct crypto_aead *tfm; |
f0706e82 | 88 | u32 replays; /* dot11RSNAStatsCCMPReplays */ |
f0706e82 | 89 | } ccmp; |
765cb46a | 90 | struct { |
75396ae6 | 91 | atomic64_t tx_pn; |
4325f6ca | 92 | u8 rx_pn[IEEE80211_CMAC_PN_LEN]; |
765cb46a JM |
93 | struct crypto_cipher *tfm; |
94 | u32 replays; /* dot11RSNAStatsCMACReplays */ | |
95 | u32 icverrors; /* dot11RSNAStatsCMACICVErrors */ | |
765cb46a | 96 | } aes_cmac; |
2475b1cc MS |
97 | struct { |
98 | /* generic cipher scheme */ | |
99 | u8 rx_pn[IEEE80211_NUM_TIDS + 1][MAX_PN_LEN]; | |
100 | } gen; | |
f0706e82 | 101 | } u; |
f0706e82 | 102 | |
8f20fc24 JB |
103 | /* number of times this key has been used */ |
104 | int tx_rx_count; | |
f0706e82 | 105 | |
e9f207f0 JB |
106 | #ifdef CONFIG_MAC80211_DEBUGFS |
107 | struct { | |
108 | struct dentry *stalink; | |
109 | struct dentry *dir; | |
d9c58f30 | 110 | int cnt; |
e9f207f0 JB |
111 | } debugfs; |
112 | #endif | |
113 | ||
8f20fc24 JB |
114 | /* |
115 | * key config, must be last because it contains key | |
116 | * material as variable length member | |
117 | */ | |
118 | struct ieee80211_key_conf conf; | |
f0706e82 JB |
119 | }; |
120 | ||
2475b1cc MS |
121 | struct ieee80211_key * |
122 | ieee80211_key_alloc(u32 cipher, int idx, size_t key_len, | |
123 | const u8 *key_data, | |
124 | size_t seq_len, const u8 *seq, | |
125 | const struct ieee80211_cipher_scheme *cs); | |
db4d1169 JB |
126 | /* |
127 | * Insert a key into data structures (sdata, sta if necessary) | |
79cf2dfa | 128 | * to make it used, free old key. On failure, also free the new key. |
db4d1169 | 129 | */ |
79cf2dfa JB |
130 | int ieee80211_key_link(struct ieee80211_key *key, |
131 | struct ieee80211_sub_if_data *sdata, | |
132 | struct sta_info *sta); | |
3b8d9c29 | 133 | void ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom); |
79cf2dfa | 134 | void ieee80211_key_free_unused(struct ieee80211_key *key); |
f7e0104c JB |
135 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx, |
136 | bool uni, bool multi); | |
3cfcf6ac JM |
137 | void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, |
138 | int idx); | |
7907c7d3 JB |
139 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata, |
140 | bool force_synchronize); | |
6d10e46b JB |
141 | void ieee80211_free_sta_keys(struct ieee80211_local *local, |
142 | struct sta_info *sta); | |
11a843b7 | 143 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata); |
11a843b7 | 144 | |
40b275b6 JB |
145 | #define key_mtx_dereference(local, ref) \ |
146 | rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx))) | |
147 | ||
8d1f7ecd JB |
148 | void ieee80211_delayed_tailroom_dec(struct work_struct *wk); |
149 | ||
f0706e82 | 150 | #endif /* IEEE80211_KEY_H */ |