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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> |
14 | #include <linux/list.h> |
15 | #include <linux/crypto.h> |
16 | #include <linux/rcupdate.h> |
17 | #include <net/mac80211.h> |
18 | |
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 |
31 | |
32 | struct ieee80211_local; |
33 | struct ieee80211_sub_if_data; |
34 | struct sta_info; |
35 | |
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. |
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. |
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. |
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. |
49 | * @KEY_FLAG_TODO_DEFMGMTKEY: Key is default management key and debugfs needs |
50 | * to be updated. |
51 | */ |
52 | enum ieee80211_internal_key_flags { |
53 | KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0), |
54 | KEY_FLAG_TODO_DELETE = BIT(1), |
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), |
59 | KEY_FLAG_TODO_DEFMGMTKEY = BIT(6), |
60 | }; |
61 | |
62 | enum ieee80211_internal_tkip_state { |
63 | TKIP_STATE_NOT_INIT, |
64 | TKIP_STATE_PHASE1_DONE, |
65 | TKIP_STATE_PHASE1_HW_UPLOADED, |
66 | }; |
67 | |
68 | struct tkip_ctx { |
69 | u32 iv32; |
70 | u16 iv16; |
71 | u16 p1k[5]; |
72 | enum ieee80211_internal_tkip_state state; |
73 | }; |
74 | |
75 | struct ieee80211_key { |
76 | struct ieee80211_local *local; |
77 | struct ieee80211_sub_if_data *sdata; |
78 | struct sta_info *sta; |
79 | |
80 | /* for sdata list */ |
81 | struct list_head list; |
82 | /* for todo list */ |
83 | struct list_head todo; |
84 | |
85 | /* protected by todo lock! */ |
86 | unsigned int flags; |
87 | |
88 | union { |
89 | struct { |
90 | /* last used TSC */ |
91 | struct tkip_ctx tx; |
92 | |
93 | /* last received RSC */ |
94 | struct tkip_ctx rx[NUM_RX_DATA_QUEUES]; |
95 | } tkip; |
96 | struct { |
97 | u8 tx_pn[6]; |
98 | u8 rx_pn[NUM_RX_DATA_QUEUES][6]; |
99 | struct crypto_cipher *tfm; |
100 | u32 replays; /* dot11RSNAStatsCCMPReplays */ |
101 | /* scratch buffers for virt_to_page() (crypto API) */ |
102 | #ifndef AES_BLOCK_LEN |
103 | #define AES_BLOCK_LEN 16 |
104 | #endif |
105 | u8 tx_crypto_buf[6 * AES_BLOCK_LEN]; |
106 | u8 rx_crypto_buf[6 * AES_BLOCK_LEN]; |
107 | } ccmp; |
108 | struct { |
109 | u8 tx_pn[6]; |
110 | u8 rx_pn[6]; |
111 | struct crypto_cipher *tfm; |
112 | u32 replays; /* dot11RSNAStatsCMACReplays */ |
113 | u32 icverrors; /* dot11RSNAStatsCMACICVErrors */ |
114 | /* scratch buffers for virt_to_page() (crypto API) */ |
115 | u8 tx_crypto_buf[2 * AES_BLOCK_LEN]; |
116 | u8 rx_crypto_buf[2 * AES_BLOCK_LEN]; |
117 | } aes_cmac; |
118 | } u; |
119 | |
120 | /* number of times this key has been used */ |
121 | int tx_rx_count; |
122 | |
123 | #ifdef CONFIG_MAC80211_DEBUGFS |
124 | struct { |
125 | struct dentry *stalink; |
126 | struct dentry *dir; |
127 | int cnt; |
128 | } debugfs; |
129 | #endif |
130 | |
131 | /* |
132 | * key config, must be last because it contains key |
133 | * material as variable length member |
134 | */ |
135 | struct ieee80211_key_conf conf; |
136 | }; |
137 | |
138 | struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg, |
139 | int idx, |
140 | size_t key_len, |
141 | const u8 *key_data, |
142 | size_t seq_len, const u8 *seq); |
143 | /* |
144 | * Insert a key into data structures (sdata, sta if necessary) |
145 | * to make it used, free old key. |
146 | */ |
147 | void ieee80211_key_link(struct ieee80211_key *key, |
148 | struct ieee80211_sub_if_data *sdata, |
149 | struct sta_info *sta); |
150 | void ieee80211_key_free(struct ieee80211_key *key); |
151 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx); |
152 | void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, |
153 | int idx); |
154 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata); |
155 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata); |
156 | void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata); |
157 | |
158 | void ieee80211_key_todo(void); |
159 | |
160 | #endif /* IEEE80211_KEY_H */ |
161 |
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