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Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
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>
Johannes Berg8f371712007-08-28 17:01:54 -040014#include <linux/list.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070015#include <linux/crypto.h>
Johannes Bergdb4d1162008-02-25 16:27:45 +010016#include <linux/rcupdate.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070017#include <net/mac80211.h>
18
Luis R. Rodriguezffd78912008-06-21 10:02:46 -040019#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
Jiri Bencf0706e82007-05-05 11:45:53 -070029
Luis R. Rodriguezffd78912008-06-21 10:02:46 -040030#define NUM_RX_DATA_QUEUES 17
Jiri Bencf0706e82007-05-05 11:45:53 -070031
Johannes Berg11a843b2007-08-28 17:01:55 -040032struct ieee80211_local;
33struct ieee80211_sub_if_data;
34struct sta_info;
35
Johannes Bergdb4d1162008-02-25 16:27:45 +010036/**
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.
Johannes Berg3b967662008-04-08 17:56:52 +020041 * @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.
Johannes Berg3a245762008-04-09 16:45:37 +020044 * @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.
Johannes Berg3b967662008-04-08 17:56:52 +020047 * @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.
Johannes Bergdb4d1162008-02-25 16:27:45 +010049 */
50enum ieee80211_internal_key_flags {
51 KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0),
Johannes Berg3b967662008-04-08 17:56:52 +020052 KEY_FLAG_TODO_DELETE = BIT(1),
Johannes Berg3a245762008-04-09 16:45:37 +020053 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),
Johannes Bergdb4d1162008-02-25 16:27:45 +010057};
Johannes Berg11a843b2007-08-28 17:01:55 -040058
Harvey Harrisonb0f76b32008-05-14 16:26:19 -070059struct tkip_ctx {
60 u32 iv32;
61 u16 iv16;
62 u16 p1k[5];
63 int initialized;
64};
65
Jiri Bencf0706e82007-05-05 11:45:53 -070066struct ieee80211_key {
Johannes Berg11a843b2007-08-28 17:01:55 -040067 struct ieee80211_local *local;
68 struct ieee80211_sub_if_data *sdata;
69 struct sta_info *sta;
70
Johannes Berg3b967662008-04-08 17:56:52 +020071 /* for sdata list */
Johannes Berg11a843b2007-08-28 17:01:55 -040072 struct list_head list;
Johannes Berg3b967662008-04-08 17:56:52 +020073 /* for todo list */
74 struct list_head todo;
Johannes Berg11a843b2007-08-28 17:01:55 -040075
Johannes Berg3b967662008-04-08 17:56:52 +020076 /* protected by todo lock! */
Johannes Berg11a843b2007-08-28 17:01:55 -040077 unsigned int flags;
78
Jiri Bencf0706e82007-05-05 11:45:53 -070079 union {
80 struct {
81 /* last used TSC */
Harvey Harrisonb0f76b32008-05-14 16:26:19 -070082 struct tkip_ctx tx;
Jiri Bencf0706e82007-05-05 11:45:53 -070083
84 /* last received RSC */
Harvey Harrisonb0f76b32008-05-14 16:26:19 -070085 struct tkip_ctx rx[NUM_RX_DATA_QUEUES];
Jiri Bencf0706e82007-05-05 11:45:53 -070086 } 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;
Jiri Bencf0706e82007-05-05 11:45:53 -0700100
Johannes Berg8f20fc22007-08-28 17:01:54 -0400101 /* number of times this key has been used */
102 int tx_rx_count;
Jiri Bencf0706e82007-05-05 11:45:53 -0700103
Jiri Bence9f207f2007-05-05 11:46:38 -0700104#ifdef CONFIG_MAC80211_DEBUGFS
105 struct {
106 struct dentry *stalink;
107 struct dentry *dir;
108 struct dentry *keylen;
Johannes Berg8f20fc22007-08-28 17:01:54 -0400109 struct dentry *flags;
Jiri Bence9f207f2007-05-05 11:46:38 -0700110 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;
Johannes Berge7a64f12007-08-28 17:01:55 -0400118 struct dentry *ifindex;
Johannes Bergd9c58f32008-04-08 16:46:36 -0400119 int cnt;
Jiri Bence9f207f2007-05-05 11:46:38 -0700120 } debugfs;
121#endif
122
Johannes Berg8f20fc22007-08-28 17:01:54 -0400123 /*
124 * key config, must be last because it contains key
125 * material as variable length member
126 */
127 struct ieee80211_key_conf conf;
Jiri Bencf0706e82007-05-05 11:45:53 -0700128};
129
Johannes Bergdb4d1162008-02-25 16:27:45 +0100130struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
Johannes Berg11a843b2007-08-28 17:01:55 -0400131 int idx,
132 size_t key_len,
133 const u8 *key_data);
Johannes Bergdb4d1162008-02-25 16:27:45 +0100134/*
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);
Johannes Berg11a843b2007-08-28 17:01:55 -0400141void 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
Johannes Berg3b967662008-04-08 17:56:52 +0200147void ieee80211_key_todo(void);
148
Jiri Bencf0706e82007-05-05 11:45:53 -0700149#endif /* IEEE80211_KEY_H */