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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 | |
21 | ||
11a843b7 JB |
22 | struct ieee80211_local; |
23 | struct ieee80211_sub_if_data; | |
24 | struct sta_info; | |
25 | ||
db4d1169 JB |
26 | /** |
27 | * enum ieee80211_internal_key_flags - internal key flags | |
28 | * | |
29 | * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present | |
30 | * in the hardware for TX crypto hardware acceleration. | |
95acac61 | 31 | * @KEY_FLAG_TAINTED: Key is tainted and packets should be dropped. |
db4d1169 JB |
32 | */ |
33 | enum ieee80211_internal_key_flags { | |
34 | KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0), | |
95acac61 | 35 | KEY_FLAG_TAINTED = BIT(1), |
db4d1169 | 36 | }; |
11a843b7 | 37 | |
ca99861d | 38 | enum ieee80211_internal_tkip_state { |
39 | TKIP_STATE_NOT_INIT, | |
40 | TKIP_STATE_PHASE1_DONE, | |
41 | TKIP_STATE_PHASE1_HW_UPLOADED, | |
42 | }; | |
43 | ||
b0f76b33 | 44 | struct tkip_ctx { |
523b02ea JB |
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 */ | |
ca99861d | 49 | enum ieee80211_internal_tkip_state state; |
b0f76b33 HH |
50 | }; |
51 | ||
f0706e82 | 52 | struct ieee80211_key { |
11a843b7 JB |
53 | struct ieee80211_local *local; |
54 | struct ieee80211_sub_if_data *sdata; | |
55 | struct sta_info *sta; | |
56 | ||
3b96766f | 57 | /* for sdata list */ |
11a843b7 JB |
58 | struct list_head list; |
59 | ||
ad0e2b5a | 60 | /* protected by key mutex */ |
11a843b7 JB |
61 | unsigned int flags; |
62 | ||
f0706e82 JB |
63 | union { |
64 | struct { | |
523b02ea JB |
65 | /* protects tx context */ |
66 | spinlock_t txlock; | |
67 | ||
f0706e82 | 68 | /* last used TSC */ |
b0f76b33 | 69 | struct tkip_ctx tx; |
f0706e82 JB |
70 | |
71 | /* last received RSC */ | |
5a306f58 | 72 | struct tkip_ctx rx[IEEE80211_NUM_TIDS]; |
b98ea058 S |
73 | |
74 | /* number of mic failures */ | |
75 | u32 mic_failures; | |
f0706e82 JB |
76 | } tkip; |
77 | struct { | |
aba83a0b | 78 | atomic64_t tx_pn; |
9190252c JM |
79 | /* |
80 | * Last received packet number. The first | |
5a306f58 | 81 | * IEEE80211_NUM_TIDS counters are used with Data |
9190252c JM |
82 | * frames and the last counter is used with Robust |
83 | * Management frames. | |
84 | */ | |
4325f6ca | 85 | u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_CCMP_PN_LEN]; |
f0706e82 JB |
86 | struct crypto_cipher *tfm; |
87 | u32 replays; /* dot11RSNAStatsCCMPReplays */ | |
f0706e82 | 88 | } ccmp; |
765cb46a | 89 | struct { |
75396ae6 | 90 | atomic64_t tx_pn; |
4325f6ca | 91 | u8 rx_pn[IEEE80211_CMAC_PN_LEN]; |
765cb46a JM |
92 | struct crypto_cipher *tfm; |
93 | u32 replays; /* dot11RSNAStatsCMACReplays */ | |
94 | u32 icverrors; /* dot11RSNAStatsCMACICVErrors */ | |
765cb46a | 95 | } aes_cmac; |
f0706e82 | 96 | } u; |
f0706e82 | 97 | |
8f20fc24 JB |
98 | /* number of times this key has been used */ |
99 | int tx_rx_count; | |
f0706e82 | 100 | |
e9f207f0 JB |
101 | #ifdef CONFIG_MAC80211_DEBUGFS |
102 | struct { | |
103 | struct dentry *stalink; | |
104 | struct dentry *dir; | |
d9c58f30 | 105 | int cnt; |
e9f207f0 JB |
106 | } debugfs; |
107 | #endif | |
108 | ||
8f20fc24 JB |
109 | /* |
110 | * key config, must be last because it contains key | |
111 | * material as variable length member | |
112 | */ | |
113 | struct ieee80211_key_conf conf; | |
f0706e82 JB |
114 | }; |
115 | ||
97359d12 | 116 | struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len, |
faa8fdc8 JM |
117 | const u8 *key_data, |
118 | size_t seq_len, const u8 *seq); | |
db4d1169 JB |
119 | /* |
120 | * Insert a key into data structures (sdata, sta if necessary) | |
79cf2dfa | 121 | * to make it used, free old key. On failure, also free the new key. |
db4d1169 | 122 | */ |
79cf2dfa JB |
123 | int ieee80211_key_link(struct ieee80211_key *key, |
124 | struct ieee80211_sub_if_data *sdata, | |
125 | struct sta_info *sta); | |
3b8d9c29 | 126 | void ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom); |
79cf2dfa | 127 | void ieee80211_key_free_unused(struct ieee80211_key *key); |
f7e0104c JB |
128 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx, |
129 | bool uni, bool multi); | |
3cfcf6ac JM |
130 | void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, |
131 | int idx); | |
11a843b7 | 132 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata); |
6d10e46b JB |
133 | void ieee80211_free_sta_keys(struct ieee80211_local *local, |
134 | struct sta_info *sta); | |
11a843b7 | 135 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata); |
11a843b7 | 136 | |
40b275b6 JB |
137 | #define key_mtx_dereference(local, ref) \ |
138 | rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx))) | |
139 | ||
8d1f7ecd JB |
140 | void ieee80211_delayed_tailroom_dec(struct work_struct *wk); |
141 | ||
f0706e82 | 142 | #endif /* IEEE80211_KEY_H */ |