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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 | ||
ffd7891d LR |
22 | #define WEP_IV_LEN 4 |
23 | #define WEP_ICV_LEN 4 | |
ffd7891d LR |
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 | |
28 | #define CCMP_PN_LEN 6 | |
29 | #define TKIP_IV_LEN 8 | |
30 | #define TKIP_ICV_LEN 4 | |
3ea542d3 | 31 | #define CMAC_PN_LEN 6 |
ffd7891d | 32 | |
11a843b7 JB |
33 | struct ieee80211_local; |
34 | struct ieee80211_sub_if_data; | |
35 | struct sta_info; | |
36 | ||
db4d1169 JB |
37 | /** |
38 | * enum ieee80211_internal_key_flags - internal key flags | |
39 | * | |
40 | * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present | |
41 | * in the hardware for TX crypto hardware acceleration. | |
95acac61 | 42 | * @KEY_FLAG_TAINTED: Key is tainted and packets should be dropped. |
db4d1169 JB |
43 | */ |
44 | enum ieee80211_internal_key_flags { | |
45 | KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0), | |
95acac61 | 46 | KEY_FLAG_TAINTED = BIT(1), |
db4d1169 | 47 | }; |
11a843b7 | 48 | |
ca99861d | 49 | enum ieee80211_internal_tkip_state { |
50 | TKIP_STATE_NOT_INIT, | |
51 | TKIP_STATE_PHASE1_DONE, | |
52 | TKIP_STATE_PHASE1_HW_UPLOADED, | |
53 | }; | |
54 | ||
b0f76b33 | 55 | struct tkip_ctx { |
523b02ea JB |
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 */ | |
ca99861d | 60 | enum ieee80211_internal_tkip_state state; |
b0f76b33 HH |
61 | }; |
62 | ||
f0706e82 | 63 | struct ieee80211_key { |
11a843b7 JB |
64 | struct ieee80211_local *local; |
65 | struct ieee80211_sub_if_data *sdata; | |
66 | struct sta_info *sta; | |
67 | ||
3b96766f | 68 | /* for sdata list */ |
11a843b7 JB |
69 | struct list_head list; |
70 | ||
ad0e2b5a | 71 | /* protected by key mutex */ |
11a843b7 JB |
72 | unsigned int flags; |
73 | ||
f0706e82 JB |
74 | union { |
75 | struct { | |
523b02ea JB |
76 | /* protects tx context */ |
77 | spinlock_t txlock; | |
78 | ||
f0706e82 | 79 | /* last used TSC */ |
b0f76b33 | 80 | struct tkip_ctx tx; |
f0706e82 JB |
81 | |
82 | /* last received RSC */ | |
5a306f58 | 83 | struct tkip_ctx rx[IEEE80211_NUM_TIDS]; |
b98ea058 S |
84 | |
85 | /* number of mic failures */ | |
86 | u32 mic_failures; | |
f0706e82 JB |
87 | } tkip; |
88 | struct { | |
aba83a0b | 89 | atomic64_t tx_pn; |
9190252c JM |
90 | /* |
91 | * Last received packet number. The first | |
5a306f58 | 92 | * IEEE80211_NUM_TIDS counters are used with Data |
9190252c JM |
93 | * frames and the last counter is used with Robust |
94 | * Management frames. | |
95 | */ | |
5a306f58 | 96 | u8 rx_pn[IEEE80211_NUM_TIDS + 1][CCMP_PN_LEN]; |
f0706e82 JB |
97 | struct crypto_cipher *tfm; |
98 | u32 replays; /* dot11RSNAStatsCCMPReplays */ | |
f0706e82 | 99 | } ccmp; |
765cb46a | 100 | struct { |
75396ae6 | 101 | atomic64_t tx_pn; |
3ea542d3 | 102 | u8 rx_pn[CMAC_PN_LEN]; |
765cb46a JM |
103 | struct crypto_cipher *tfm; |
104 | u32 replays; /* dot11RSNAStatsCMACReplays */ | |
105 | u32 icverrors; /* dot11RSNAStatsCMACICVErrors */ | |
765cb46a | 106 | } aes_cmac; |
f0706e82 | 107 | } u; |
f0706e82 | 108 | |
8f20fc24 JB |
109 | /* number of times this key has been used */ |
110 | int tx_rx_count; | |
f0706e82 | 111 | |
e9f207f0 JB |
112 | #ifdef CONFIG_MAC80211_DEBUGFS |
113 | struct { | |
114 | struct dentry *stalink; | |
115 | struct dentry *dir; | |
d9c58f30 | 116 | int cnt; |
e9f207f0 JB |
117 | } debugfs; |
118 | #endif | |
119 | ||
8f20fc24 JB |
120 | /* |
121 | * key config, must be last because it contains key | |
122 | * material as variable length member | |
123 | */ | |
124 | struct ieee80211_key_conf conf; | |
f0706e82 JB |
125 | }; |
126 | ||
97359d12 | 127 | struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len, |
faa8fdc8 JM |
128 | const u8 *key_data, |
129 | size_t seq_len, const u8 *seq); | |
db4d1169 JB |
130 | /* |
131 | * Insert a key into data structures (sdata, sta if necessary) | |
132 | * to make it used, free old key. | |
133 | */ | |
3ffc2a90 JB |
134 | int __must_check ieee80211_key_link(struct ieee80211_key *key, |
135 | struct ieee80211_sub_if_data *sdata, | |
136 | struct sta_info *sta); | |
8d1f7ecd | 137 | void __ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom); |
32162a4d JM |
138 | void ieee80211_key_free(struct ieee80211_local *local, |
139 | struct ieee80211_key *key); | |
f7e0104c JB |
140 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx, |
141 | bool uni, bool multi); | |
3cfcf6ac JM |
142 | void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, |
143 | int idx); | |
11a843b7 JB |
144 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata); |
145 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata); | |
11a843b7 | 146 | |
40b275b6 JB |
147 | #define key_mtx_dereference(local, ref) \ |
148 | rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx))) | |
149 | ||
8d1f7ecd JB |
150 | void ieee80211_delayed_tailroom_dec(struct work_struct *wk); |
151 | ||
f0706e82 | 152 | #endif /* IEEE80211_KEY_H */ |