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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 NUM_DEFAULT_KEYS 4
20#define NUM_DEFAULT_MGMT_KEYS 2
21
22struct ieee80211_local;
23struct ieee80211_sub_if_data;
24struct sta_info;
25
26/**
27 * enum ieee80211_internal_key_flags - internal key flags
28 *
29 * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
30 * in the hardware for TX crypto hardware acceleration.
31 * @KEY_FLAG_TAINTED: Key is tainted and packets should be dropped.
32 * @KEY_FLAG_CIPHER_SCHEME: This key is for a hardware cipher scheme
33 */
34enum ieee80211_internal_key_flags {
35 KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0),
36 KEY_FLAG_TAINTED = BIT(1),
37 KEY_FLAG_CIPHER_SCHEME = BIT(2),
38};
39
40enum ieee80211_internal_tkip_state {
41 TKIP_STATE_NOT_INIT,
42 TKIP_STATE_PHASE1_DONE,
43 TKIP_STATE_PHASE1_HW_UPLOADED,
44};
45
46struct tkip_ctx {
47 u16 p1k[5]; /* p1k cache */
48 u32 p1k_iv32; /* iv32 for which p1k computed */
49 enum ieee80211_internal_tkip_state state;
50};
51
52struct tkip_ctx_rx {
53 struct tkip_ctx ctx;
54 u32 iv32; /* current iv32 */
55 u16 iv16; /* current iv16 */
56};
57
58struct ieee80211_key {
59 struct ieee80211_local *local;
60 struct ieee80211_sub_if_data *sdata;
61 struct sta_info *sta;
62
63 /* for sdata list */
64 struct list_head list;
65
66 /* protected by key mutex */
67 unsigned int flags;
68
69 union {
70 struct {
71 /* protects tx context */
72 spinlock_t txlock;
73
74 /* last used TSC */
75 struct tkip_ctx tx;
76
77 /* last received RSC */
78 struct tkip_ctx_rx rx[IEEE80211_NUM_TIDS];
79
80 /* number of mic failures */
81 u32 mic_failures;
82 } tkip;
83 struct {
84 /*
85 * Last received packet number. The first
86 * IEEE80211_NUM_TIDS counters are used with Data
87 * frames and the last counter is used with Robust
88 * Management frames.
89 */
90 u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_CCMP_PN_LEN];
91 struct crypto_aead *tfm;
92 u32 replays; /* dot11RSNAStatsCCMPReplays */
93 } ccmp;
94 struct {
95 u8 rx_pn[IEEE80211_CMAC_PN_LEN];
96 struct crypto_cipher *tfm;
97 u32 replays; /* dot11RSNAStatsCMACReplays */
98 u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
99 } aes_cmac;
100 struct {
101 u8 rx_pn[IEEE80211_GMAC_PN_LEN];
102 struct crypto_aead *tfm;
103 u32 replays; /* dot11RSNAStatsCMACReplays */
104 u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
105 } aes_gmac;
106 struct {
107 /* Last received packet number. The first
108 * IEEE80211_NUM_TIDS counters are used with Data
109 * frames and the last counter is used with Robust
110 * Management frames.
111 */
112 u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_GCMP_PN_LEN];
113 struct crypto_aead *tfm;
114 u32 replays; /* dot11RSNAStatsGCMPReplays */
115 } gcmp;
116 struct {
117 /* generic cipher scheme */
118 u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_MAX_PN_LEN];
119 } gen;
120 } u;
121
122#ifdef CONFIG_MAC80211_DEBUGFS
123 struct {
124 struct dentry *stalink;
125 struct dentry *dir;
126 int cnt;
127 } debugfs;
128#endif
129
130 /*
131 * key config, must be last because it contains key
132 * material as variable length member
133 */
134 struct ieee80211_key_conf conf;
135};
136
137struct ieee80211_key *
138ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
139 const u8 *key_data,
140 size_t seq_len, const u8 *seq,
141 const struct ieee80211_cipher_scheme *cs);
142/*
143 * Insert a key into data structures (sdata, sta if necessary)
144 * to make it used, free old key. On failure, also free the new key.
145 */
146int 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, bool delay_tailroom);
150void ieee80211_key_free_unused(struct ieee80211_key *key);
151void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx,
152 bool uni, bool multi);
153void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
154 int idx);
155void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata,
156 bool force_synchronize);
157void ieee80211_free_sta_keys(struct ieee80211_local *local,
158 struct sta_info *sta);
159void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
160void ieee80211_reset_crypto_tx_tailroom(struct ieee80211_sub_if_data *sdata);
161
162#define key_mtx_dereference(local, ref) \
163 rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx)))
164
165void ieee80211_delayed_tailroom_dec(struct work_struct *wk);
166
167#endif /* 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 <linux/rcupdate.h>
17#include <net/mac80211.h>
18
19#define NUM_DEFAULT_KEYS 4
20#define NUM_DEFAULT_MGMT_KEYS 2
21
22struct ieee80211_local;
23struct ieee80211_sub_if_data;
24struct sta_info;
25
26/**
27 * enum ieee80211_internal_key_flags - internal key flags
28 *
29 * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
30 * in the hardware for TX crypto hardware acceleration.
31 * @KEY_FLAG_TAINTED: Key is tainted and packets should be dropped.
32 * @KEY_FLAG_CIPHER_SCHEME: This key is for a hardware cipher scheme
33 */
34enum ieee80211_internal_key_flags {
35 KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0),
36 KEY_FLAG_TAINTED = BIT(1),
37 KEY_FLAG_CIPHER_SCHEME = BIT(2),
38};
39
40enum ieee80211_internal_tkip_state {
41 TKIP_STATE_NOT_INIT,
42 TKIP_STATE_PHASE1_DONE,
43 TKIP_STATE_PHASE1_HW_UPLOADED,
44};
45
46struct tkip_ctx {
47 u16 p1k[5]; /* p1k cache */
48 u32 p1k_iv32; /* iv32 for which p1k computed */
49 enum ieee80211_internal_tkip_state state;
50};
51
52struct tkip_ctx_rx {
53 struct tkip_ctx ctx;
54 u32 iv32; /* current iv32 */
55 u16 iv16; /* current iv16 */
56};
57
58struct ieee80211_key {
59 struct ieee80211_local *local;
60 struct ieee80211_sub_if_data *sdata;
61 struct sta_info *sta;
62
63 /* for sdata list */
64 struct list_head list;
65
66 /* protected by key mutex */
67 unsigned int flags;
68
69 union {
70 struct {
71 /* protects tx context */
72 spinlock_t txlock;
73
74 /* last used TSC */
75 struct tkip_ctx tx;
76
77 /* last received RSC */
78 struct tkip_ctx_rx rx[IEEE80211_NUM_TIDS];
79
80 /* number of mic failures */
81 u32 mic_failures;
82 } tkip;
83 struct {
84 /*
85 * Last received packet number. The first
86 * IEEE80211_NUM_TIDS counters are used with Data
87 * frames and the last counter is used with Robust
88 * Management frames.
89 */
90 u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_CCMP_PN_LEN];
91 struct crypto_aead *tfm;
92 u32 replays; /* dot11RSNAStatsCCMPReplays */
93 } ccmp;
94 struct {
95 u8 rx_pn[IEEE80211_CMAC_PN_LEN];
96 struct crypto_shash *tfm;
97 u32 replays; /* dot11RSNAStatsCMACReplays */
98 u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
99 } aes_cmac;
100 struct {
101 u8 rx_pn[IEEE80211_GMAC_PN_LEN];
102 struct crypto_aead *tfm;
103 u32 replays; /* dot11RSNAStatsCMACReplays */
104 u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
105 } aes_gmac;
106 struct {
107 /* Last received packet number. The first
108 * IEEE80211_NUM_TIDS counters are used with Data
109 * frames and the last counter is used with Robust
110 * Management frames.
111 */
112 u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_GCMP_PN_LEN];
113 struct crypto_aead *tfm;
114 u32 replays; /* dot11RSNAStatsGCMPReplays */
115 } gcmp;
116 struct {
117 /* generic cipher scheme */
118 u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_MAX_PN_LEN];
119 } gen;
120 } u;
121
122#ifdef CONFIG_MAC80211_DEBUGFS
123 struct {
124 struct dentry *stalink;
125 struct dentry *dir;
126 int cnt;
127 } debugfs;
128#endif
129
130 /*
131 * key config, must be last because it contains key
132 * material as variable length member
133 */
134 struct ieee80211_key_conf conf;
135};
136
137struct ieee80211_key *
138ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
139 const u8 *key_data,
140 size_t seq_len, const u8 *seq,
141 const struct ieee80211_cipher_scheme *cs);
142/*
143 * Insert a key into data structures (sdata, sta if necessary)
144 * to make it used, free old key. On failure, also free the new key.
145 */
146int 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, bool delay_tailroom);
150void ieee80211_key_free_unused(struct ieee80211_key *key);
151void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx,
152 bool uni, bool multi);
153void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
154 int idx);
155void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata,
156 bool force_synchronize);
157void ieee80211_free_sta_keys(struct ieee80211_local *local,
158 struct sta_info *sta);
159void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
160void ieee80211_reset_crypto_tx_tailroom(struct ieee80211_sub_if_data *sdata);
161
162#define key_mtx_dereference(local, ref) \
163 rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx)))
164
165void ieee80211_delayed_tailroom_dec(struct work_struct *wk);
166
167#endif /* IEEE80211_KEY_H */