Linux kernel mirror (for testing)
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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
32struct ieee80211_local;
33struct ieee80211_sub_if_data;
34struct 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 */
50enum ieee80211_internal_key_flags {
51 KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0),
52 KEY_FLAG_TODO_DELETE = BIT(1),
53 KEY_FLAG_TODO_HWACCEL_ADD = BIT(2),
54 KEY_FLAG_TODO_HWACCEL_REMOVE = BIT(3),
55 KEY_FLAG_TODO_DEFKEY = BIT(4),
56 KEY_FLAG_TODO_ADD_DEBUGFS = BIT(5),
57};
58
59struct tkip_ctx {
60 u32 iv32;
61 u16 iv16;
62 u16 p1k[5];
63 int initialized;
64};
65
66struct ieee80211_key {
67 struct ieee80211_local *local;
68 struct ieee80211_sub_if_data *sdata;
69 struct sta_info *sta;
70
71 /* for sdata list */
72 struct list_head list;
73 /* for todo list */
74 struct list_head todo;
75
76 /* protected by todo lock! */
77 unsigned int flags;
78
79 union {
80 struct {
81 /* last used TSC */
82 struct tkip_ctx tx;
83
84 /* last received RSC */
85 struct tkip_ctx rx[NUM_RX_DATA_QUEUES];
86 } tkip;
87 struct {
88 u8 tx_pn[6];
89 u8 rx_pn[NUM_RX_DATA_QUEUES][6];
90 struct crypto_cipher *tfm;
91 u32 replays; /* dot11RSNAStatsCCMPReplays */
92 /* scratch buffers for virt_to_page() (crypto API) */
93#ifndef AES_BLOCK_LEN
94#define AES_BLOCK_LEN 16
95#endif
96 u8 tx_crypto_buf[6 * AES_BLOCK_LEN];
97 u8 rx_crypto_buf[6 * AES_BLOCK_LEN];
98 } ccmp;
99 } u;
100
101 /* number of times this key has been used */
102 int tx_rx_count;
103
104#ifdef CONFIG_MAC80211_DEBUGFS
105 struct {
106 struct dentry *stalink;
107 struct dentry *dir;
108 struct dentry *keylen;
109 struct dentry *flags;
110 struct dentry *keyidx;
111 struct dentry *hw_key_idx;
112 struct dentry *tx_rx_count;
113 struct dentry *algorithm;
114 struct dentry *tx_spec;
115 struct dentry *rx_spec;
116 struct dentry *replays;
117 struct dentry *key;
118 struct dentry *ifindex;
119 int cnt;
120 } debugfs;
121#endif
122
123 /*
124 * key config, must be last because it contains key
125 * material as variable length member
126 */
127 struct ieee80211_key_conf conf;
128};
129
130struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
131 int idx,
132 size_t key_len,
133 const u8 *key_data);
134/*
135 * Insert a key into data structures (sdata, sta if necessary)
136 * to make it used, free old key.
137 */
138void ieee80211_key_link(struct ieee80211_key *key,
139 struct ieee80211_sub_if_data *sdata,
140 struct sta_info *sta);
141void ieee80211_key_free(struct ieee80211_key *key);
142void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx);
143void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata);
144void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
145void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata);
146
147void ieee80211_key_todo(void);
148
149#endif /* IEEE80211_KEY_H */