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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 | ||
ffd7891d LR |
19 | #define WEP_IV_LEN 4 |
20 | #define WEP_ICV_LEN 4 | |
21 | #define ALG_TKIP_KEY_LEN 32 | |
22 | #define ALG_CCMP_KEY_LEN 16 | |
23 | #define CCMP_HDR_LEN 8 | |
24 | #define CCMP_MIC_LEN 8 | |
25 | #define CCMP_TK_LEN 16 | |
26 | #define CCMP_PN_LEN 6 | |
27 | #define TKIP_IV_LEN 8 | |
28 | #define TKIP_ICV_LEN 4 | |
29 | ||
30 | #define NUM_RX_DATA_QUEUES 17 | |
f0706e82 | 31 | |
11a843b7 JB |
32 | struct ieee80211_local; |
33 | struct ieee80211_sub_if_data; | |
34 | struct sta_info; | |
35 | ||
db4d1169 JB |
36 | /** |
37 | * enum ieee80211_internal_key_flags - internal key flags | |
38 | * | |
39 | * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present | |
40 | * in the hardware for TX crypto hardware acceleration. | |
3b96766f JB |
41 | * @KEY_FLAG_TODO_DELETE: Key is marked for deletion and will, after an |
42 | * RCU grace period, no longer be reachable other than from the | |
43 | * todo list. | |
3a245766 JB |
44 | * @KEY_FLAG_TODO_HWACCEL_ADD: Key needs to be added to hardware acceleration. |
45 | * @KEY_FLAG_TODO_HWACCEL_REMOVE: Key needs to be removed from hardware | |
46 | * acceleration. | |
3b96766f JB |
47 | * @KEY_FLAG_TODO_DEFKEY: Key is default key and debugfs needs to be updated. |
48 | * @KEY_FLAG_TODO_ADD_DEBUGFS: Key needs to be added to debugfs. | |
3cfcf6ac JM |
49 | * @KEY_FLAG_TODO_DEFMGMTKEY: Key is default management key and debugfs needs |
50 | * to be updated. | |
db4d1169 JB |
51 | */ |
52 | enum ieee80211_internal_key_flags { | |
53 | KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0), | |
3b96766f | 54 | KEY_FLAG_TODO_DELETE = BIT(1), |
3a245766 JB |
55 | KEY_FLAG_TODO_HWACCEL_ADD = BIT(2), |
56 | KEY_FLAG_TODO_HWACCEL_REMOVE = BIT(3), | |
57 | KEY_FLAG_TODO_DEFKEY = BIT(4), | |
58 | KEY_FLAG_TODO_ADD_DEBUGFS = BIT(5), | |
3cfcf6ac | 59 | KEY_FLAG_TODO_DEFMGMTKEY = BIT(6), |
db4d1169 | 60 | }; |
11a843b7 | 61 | |
b0f76b33 HH |
62 | struct tkip_ctx { |
63 | u32 iv32; | |
64 | u16 iv16; | |
65 | u16 p1k[5]; | |
66 | int initialized; | |
67 | }; | |
68 | ||
f0706e82 | 69 | struct ieee80211_key { |
11a843b7 JB |
70 | struct ieee80211_local *local; |
71 | struct ieee80211_sub_if_data *sdata; | |
72 | struct sta_info *sta; | |
73 | ||
3b96766f | 74 | /* for sdata list */ |
11a843b7 | 75 | struct list_head list; |
3b96766f JB |
76 | /* for todo list */ |
77 | struct list_head todo; | |
11a843b7 | 78 | |
3b96766f | 79 | /* protected by todo lock! */ |
11a843b7 JB |
80 | unsigned int flags; |
81 | ||
f0706e82 JB |
82 | union { |
83 | struct { | |
84 | /* last used TSC */ | |
b0f76b33 | 85 | struct tkip_ctx tx; |
f0706e82 JB |
86 | |
87 | /* last received RSC */ | |
b0f76b33 | 88 | struct tkip_ctx rx[NUM_RX_DATA_QUEUES]; |
f0706e82 JB |
89 | } tkip; |
90 | struct { | |
91 | u8 tx_pn[6]; | |
92 | u8 rx_pn[NUM_RX_DATA_QUEUES][6]; | |
93 | struct crypto_cipher *tfm; | |
94 | u32 replays; /* dot11RSNAStatsCCMPReplays */ | |
95 | /* scratch buffers for virt_to_page() (crypto API) */ | |
96 | #ifndef AES_BLOCK_LEN | |
97 | #define AES_BLOCK_LEN 16 | |
98 | #endif | |
99 | u8 tx_crypto_buf[6 * AES_BLOCK_LEN]; | |
100 | u8 rx_crypto_buf[6 * AES_BLOCK_LEN]; | |
101 | } ccmp; | |
765cb46a JM |
102 | struct { |
103 | u8 tx_pn[6]; | |
104 | u8 rx_pn[6]; | |
105 | struct crypto_cipher *tfm; | |
106 | u32 replays; /* dot11RSNAStatsCMACReplays */ | |
107 | u32 icverrors; /* dot11RSNAStatsCMACICVErrors */ | |
108 | /* scratch buffers for virt_to_page() (crypto API) */ | |
109 | u8 tx_crypto_buf[2 * AES_BLOCK_LEN]; | |
110 | u8 rx_crypto_buf[2 * AES_BLOCK_LEN]; | |
111 | } aes_cmac; | |
f0706e82 | 112 | } u; |
f0706e82 | 113 | |
8f20fc24 JB |
114 | /* number of times this key has been used */ |
115 | int tx_rx_count; | |
f0706e82 | 116 | |
e9f207f0 JB |
117 | #ifdef CONFIG_MAC80211_DEBUGFS |
118 | struct { | |
119 | struct dentry *stalink; | |
120 | struct dentry *dir; | |
d9c58f30 | 121 | int cnt; |
e9f207f0 JB |
122 | } debugfs; |
123 | #endif | |
124 | ||
8f20fc24 JB |
125 | /* |
126 | * key config, must be last because it contains key | |
127 | * material as variable length member | |
128 | */ | |
129 | struct ieee80211_key_conf conf; | |
f0706e82 JB |
130 | }; |
131 | ||
db4d1169 | 132 | struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg, |
11a843b7 JB |
133 | int idx, |
134 | size_t key_len, | |
faa8fdc8 JM |
135 | const u8 *key_data, |
136 | size_t seq_len, const u8 *seq); | |
db4d1169 JB |
137 | /* |
138 | * Insert a key into data structures (sdata, sta if necessary) | |
139 | * to make it used, free old key. | |
140 | */ | |
141 | void ieee80211_key_link(struct ieee80211_key *key, | |
142 | struct ieee80211_sub_if_data *sdata, | |
143 | struct sta_info *sta); | |
11a843b7 JB |
144 | void ieee80211_key_free(struct ieee80211_key *key); |
145 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx); | |
3cfcf6ac JM |
146 | void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, |
147 | int idx); | |
11a843b7 JB |
148 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata); |
149 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata); | |
150 | void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata); | |
151 | ||
3b96766f JB |
152 | void ieee80211_key_todo(void); |
153 | ||
f0706e82 | 154 | #endif /* IEEE80211_KEY_H */ |