add git checkout support
[openwrt/openwrt.git] / package / mac80211 / src / mac80211 / ieee80211_key.h
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 <net/mac80211.h>
17
18 /* ALG_TKIP
19 * struct ieee80211_key::key is encoded as a 256-bit (32 byte) data block:
20 * Temporal Encryption Key (128 bits)
21 * Temporal Authenticator Tx MIC Key (64 bits)
22 * Temporal Authenticator Rx MIC Key (64 bits)
23 */
24
25 #define WEP_IV_LEN 4
26 #define WEP_ICV_LEN 4
27
28 #define ALG_TKIP_KEY_LEN 32
29 /* Starting offsets for each key */
30 #define ALG_TKIP_TEMP_ENCR_KEY 0
31 #define ALG_TKIP_TEMP_AUTH_TX_MIC_KEY 16
32 #define ALG_TKIP_TEMP_AUTH_RX_MIC_KEY 24
33 #define TKIP_IV_LEN 8
34 #define TKIP_ICV_LEN 4
35
36 #define ALG_CCMP_KEY_LEN 16
37 #define CCMP_HDR_LEN 8
38 #define CCMP_MIC_LEN 8
39 #define CCMP_TK_LEN 16
40 #define CCMP_PN_LEN 6
41
42 #define NUM_RX_DATA_QUEUES 17
43
44 struct ieee80211_local;
45 struct ieee80211_sub_if_data;
46 struct sta_info;
47
48 #define KEY_FLAG_UPLOADED_TO_HARDWARE (1<<0)
49
50 struct ieee80211_key {
51 struct ieee80211_local *local;
52 struct ieee80211_sub_if_data *sdata;
53 struct sta_info *sta;
54
55 struct list_head list;
56
57 unsigned int flags;
58
59 union {
60 struct {
61 /* last used TSC */
62 u32 iv32;
63 u16 iv16;
64 u16 p1k[5];
65 int tx_initialized;
66
67 /* last received RSC */
68 u32 iv32_rx[NUM_RX_DATA_QUEUES];
69 u16 iv16_rx[NUM_RX_DATA_QUEUES];
70 u16 p1k_rx[NUM_RX_DATA_QUEUES][5];
71 int rx_initialized[NUM_RX_DATA_QUEUES];
72 } tkip;
73 struct {
74 u8 tx_pn[6];
75 u8 rx_pn[NUM_RX_DATA_QUEUES][6];
76 struct crypto_cipher *tfm;
77 u32 replays; /* dot11RSNAStatsCCMPReplays */
78 /* scratch buffers for virt_to_page() (crypto API) */
79 #ifndef AES_BLOCK_LEN
80 #define AES_BLOCK_LEN 16
81 #endif
82 u8 tx_crypto_buf[6 * AES_BLOCK_LEN];
83 u8 rx_crypto_buf[6 * AES_BLOCK_LEN];
84 } ccmp;
85 } u;
86
87 /* number of times this key has been used */
88 int tx_rx_count;
89
90 #ifdef CONFIG_MAC80211_DEBUGFS
91 struct {
92 struct dentry *stalink;
93 struct dentry *dir;
94 struct dentry *keylen;
95 struct dentry *flags;
96 struct dentry *keyidx;
97 struct dentry *hw_key_idx;
98 struct dentry *tx_rx_count;
99 struct dentry *algorithm;
100 struct dentry *tx_spec;
101 struct dentry *rx_spec;
102 struct dentry *replays;
103 struct dentry *key;
104 struct dentry *ifindex;
105 } debugfs;
106 #endif
107
108 /*
109 * key config, must be last because it contains key
110 * material as variable length member
111 */
112 struct ieee80211_key_conf conf;
113 };
114
115 struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata,
116 struct sta_info *sta,
117 enum ieee80211_key_alg alg,
118 int idx,
119 size_t key_len,
120 const u8 *key_data);
121 void ieee80211_key_free(struct ieee80211_key *key);
122 void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx);
123 void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata);
124 void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
125 void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata);
126
127 #endif /* IEEE80211_KEY_H */