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-rw-r--r--net/mac80211/key.h157
1 files changed, 157 insertions, 0 deletions
diff --git a/net/mac80211/key.h b/net/mac80211/key.h
new file mode 100644
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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/* ALG_TKIP
20 * struct ieee80211_key::key is encoded as a 256-bit (32 byte) data block:
21 * Temporal Encryption Key (128 bits)
22 * Temporal Authenticator Tx MIC Key (64 bits)
23 * Temporal Authenticator Rx MIC Key (64 bits)
24 */
25
26#define WEP_IV_LEN 4
27#define WEP_ICV_LEN 4
28
29#define ALG_TKIP_KEY_LEN 32
30/* Starting offsets for each key */
31#define ALG_TKIP_TEMP_ENCR_KEY 0
32#define ALG_TKIP_TEMP_AUTH_TX_MIC_KEY 16
33#define ALG_TKIP_TEMP_AUTH_RX_MIC_KEY 24
34#define TKIP_IV_LEN 8
35#define TKIP_ICV_LEN 4
36
37#define ALG_CCMP_KEY_LEN 16
38#define CCMP_HDR_LEN 8
39#define CCMP_MIC_LEN 8
40#define CCMP_TK_LEN 16
41#define CCMP_PN_LEN 6
42
43#define NUM_RX_DATA_QUEUES 17
44
45struct ieee80211_local;
46struct ieee80211_sub_if_data;
47struct sta_info;
48
49/**
50 * enum ieee80211_internal_key_flags - internal key flags
51 *
52 * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
53 * in the hardware for TX crypto hardware acceleration.
54 * @KEY_FLAG_TODO_DELETE: Key is marked for deletion and will, after an
55 * RCU grace period, no longer be reachable other than from the
56 * todo list.
57 * @KEY_FLAG_TODO_HWACCEL: Key needs to be added to hardware acceleration.
58 * @KEY_FLAG_TODO_DEFKEY: Key is default key and debugfs needs to be updated.
59 * @KEY_FLAG_TODO_ADD_DEBUGFS: Key needs to be added to debugfs.
60 */
61enum ieee80211_internal_key_flags {
62 KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0),
63 KEY_FLAG_TODO_DELETE = BIT(1),
64 KEY_FLAG_TODO_HWACCEL = BIT(2),
65 KEY_FLAG_TODO_DEFKEY = BIT(3),
66 KEY_FLAG_TODO_ADD_DEBUGFS = BIT(4),
67};
68
69struct ieee80211_key {
70 struct ieee80211_local *local;
71 struct ieee80211_sub_if_data *sdata;
72 struct sta_info *sta;
73
74 /* for sdata list */
75 struct list_head list;
76 /* for todo list */
77 struct list_head todo;
78
79 /* protected by todo lock! */
80 unsigned int flags;
81
82 union {
83 struct {
84 /* last used TSC */
85 u32 iv32;
86 u16 iv16;
87 u16 p1k[5];
88 int tx_initialized;
89
90 /* last received RSC */
91 u32 iv32_rx[NUM_RX_DATA_QUEUES];
92 u16 iv16_rx[NUM_RX_DATA_QUEUES];
93 u16 p1k_rx[NUM_RX_DATA_QUEUES][5];
94 int rx_initialized[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 } u;
109
110 /* number of times this key has been used */
111 int tx_rx_count;
112
113#ifdef CONFIG_MAC80211_DEBUGFS
114 struct {
115 struct dentry *stalink;
116 struct dentry *dir;
117 struct dentry *keylen;
118 struct dentry *flags;
119 struct dentry *keyidx;
120 struct dentry *hw_key_idx;
121 struct dentry *tx_rx_count;
122 struct dentry *algorithm;
123 struct dentry *tx_spec;
124 struct dentry *rx_spec;
125 struct dentry *replays;
126 struct dentry *key;
127 struct dentry *ifindex;
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
138struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
139 int idx,
140 size_t key_len,
141 const u8 *key_data);
142/*
143 * Insert a key into data structures (sdata, sta if necessary)
144 * to make it used, free old key.
145 */
146void ieee80211_key_link(struct ieee80211_key *key,
147 struct ieee80211_sub_if_data *sdata,
148 struct sta_info *sta);
149void ieee80211_key_free(struct ieee80211_key *key);
150void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx);
151void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata);
152void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
153void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata);
154
155void ieee80211_key_todo(void);
156
157#endif /* IEEE80211_KEY_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 14:24:22 -0500