Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 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> |
Johannes Berg | 8f37171 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 14 | #include <linux/list.h> |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 15 | #include <linux/crypto.h> |
Johannes Berg | db4d116 | 2008-02-25 16:27:45 +0100 | [diff] [blame] | 16 | #include <linux/rcupdate.h> |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 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 | |
Johannes Berg | 11a843b | 2007-08-28 17:01:55 -0400 | [diff] [blame] | 45 | struct ieee80211_local; |
| 46 | struct ieee80211_sub_if_data; |
| 47 | struct sta_info; |
| 48 | |
Johannes Berg | db4d116 | 2008-02-25 16:27:45 +0100 | [diff] [blame] | 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. |
Johannes Berg | 3b96766 | 2008-04-08 17:56:52 +0200 | [diff] [blame] | 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. |
Johannes Berg | 3a24576 | 2008-04-09 16:45:37 +0200 | [diff] [blame^] | 57 | * @KEY_FLAG_TODO_HWACCEL_ADD: Key needs to be added to hardware acceleration. |
| 58 | * @KEY_FLAG_TODO_HWACCEL_REMOVE: Key needs to be removed from hardware |
| 59 | * acceleration. |
Johannes Berg | 3b96766 | 2008-04-08 17:56:52 +0200 | [diff] [blame] | 60 | * @KEY_FLAG_TODO_DEFKEY: Key is default key and debugfs needs to be updated. |
| 61 | * @KEY_FLAG_TODO_ADD_DEBUGFS: Key needs to be added to debugfs. |
Johannes Berg | db4d116 | 2008-02-25 16:27:45 +0100 | [diff] [blame] | 62 | */ |
| 63 | enum ieee80211_internal_key_flags { |
| 64 | KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0), |
Johannes Berg | 3b96766 | 2008-04-08 17:56:52 +0200 | [diff] [blame] | 65 | KEY_FLAG_TODO_DELETE = BIT(1), |
Johannes Berg | 3a24576 | 2008-04-09 16:45:37 +0200 | [diff] [blame^] | 66 | KEY_FLAG_TODO_HWACCEL_ADD = BIT(2), |
| 67 | KEY_FLAG_TODO_HWACCEL_REMOVE = BIT(3), |
| 68 | KEY_FLAG_TODO_DEFKEY = BIT(4), |
| 69 | KEY_FLAG_TODO_ADD_DEBUGFS = BIT(5), |
Johannes Berg | db4d116 | 2008-02-25 16:27:45 +0100 | [diff] [blame] | 70 | }; |
Johannes Berg | 11a843b | 2007-08-28 17:01:55 -0400 | [diff] [blame] | 71 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 72 | struct ieee80211_key { |
Johannes Berg | 11a843b | 2007-08-28 17:01:55 -0400 | [diff] [blame] | 73 | struct ieee80211_local *local; |
| 74 | struct ieee80211_sub_if_data *sdata; |
| 75 | struct sta_info *sta; |
| 76 | |
Johannes Berg | 3b96766 | 2008-04-08 17:56:52 +0200 | [diff] [blame] | 77 | /* for sdata list */ |
Johannes Berg | 11a843b | 2007-08-28 17:01:55 -0400 | [diff] [blame] | 78 | struct list_head list; |
Johannes Berg | 3b96766 | 2008-04-08 17:56:52 +0200 | [diff] [blame] | 79 | /* for todo list */ |
| 80 | struct list_head todo; |
Johannes Berg | 11a843b | 2007-08-28 17:01:55 -0400 | [diff] [blame] | 81 | |
Johannes Berg | 3b96766 | 2008-04-08 17:56:52 +0200 | [diff] [blame] | 82 | /* protected by todo lock! */ |
Johannes Berg | 11a843b | 2007-08-28 17:01:55 -0400 | [diff] [blame] | 83 | unsigned int flags; |
| 84 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 85 | union { |
| 86 | struct { |
| 87 | /* last used TSC */ |
| 88 | u32 iv32; |
| 89 | u16 iv16; |
| 90 | u16 p1k[5]; |
| 91 | int tx_initialized; |
| 92 | |
| 93 | /* last received RSC */ |
| 94 | u32 iv32_rx[NUM_RX_DATA_QUEUES]; |
| 95 | u16 iv16_rx[NUM_RX_DATA_QUEUES]; |
| 96 | u16 p1k_rx[NUM_RX_DATA_QUEUES][5]; |
| 97 | int rx_initialized[NUM_RX_DATA_QUEUES]; |
| 98 | } tkip; |
| 99 | struct { |
| 100 | u8 tx_pn[6]; |
| 101 | u8 rx_pn[NUM_RX_DATA_QUEUES][6]; |
| 102 | struct crypto_cipher *tfm; |
| 103 | u32 replays; /* dot11RSNAStatsCCMPReplays */ |
| 104 | /* scratch buffers for virt_to_page() (crypto API) */ |
| 105 | #ifndef AES_BLOCK_LEN |
| 106 | #define AES_BLOCK_LEN 16 |
| 107 | #endif |
| 108 | u8 tx_crypto_buf[6 * AES_BLOCK_LEN]; |
| 109 | u8 rx_crypto_buf[6 * AES_BLOCK_LEN]; |
| 110 | } ccmp; |
| 111 | } u; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 112 | |
Johannes Berg | 8f20fc2 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 113 | /* number of times this key has been used */ |
| 114 | int tx_rx_count; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 115 | |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 116 | #ifdef CONFIG_MAC80211_DEBUGFS |
| 117 | struct { |
| 118 | struct dentry *stalink; |
| 119 | struct dentry *dir; |
| 120 | struct dentry *keylen; |
Johannes Berg | 8f20fc2 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 121 | struct dentry *flags; |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 122 | struct dentry *keyidx; |
| 123 | struct dentry *hw_key_idx; |
| 124 | struct dentry *tx_rx_count; |
| 125 | struct dentry *algorithm; |
| 126 | struct dentry *tx_spec; |
| 127 | struct dentry *rx_spec; |
| 128 | struct dentry *replays; |
| 129 | struct dentry *key; |
Johannes Berg | e7a64f1 | 2007-08-28 17:01:55 -0400 | [diff] [blame] | 130 | struct dentry *ifindex; |
Johannes Berg | d9c58f3 | 2008-04-08 16:46:36 -0400 | [diff] [blame] | 131 | int cnt; |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 132 | } debugfs; |
| 133 | #endif |
| 134 | |
Johannes Berg | 8f20fc2 | 2007-08-28 17:01:54 -0400 | [diff] [blame] | 135 | /* |
| 136 | * key config, must be last because it contains key |
| 137 | * material as variable length member |
| 138 | */ |
| 139 | struct ieee80211_key_conf conf; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 140 | }; |
| 141 | |
Johannes Berg | db4d116 | 2008-02-25 16:27:45 +0100 | [diff] [blame] | 142 | struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg, |
Johannes Berg | 11a843b | 2007-08-28 17:01:55 -0400 | [diff] [blame] | 143 | int idx, |
| 144 | size_t key_len, |
| 145 | const u8 *key_data); |
Johannes Berg | db4d116 | 2008-02-25 16:27:45 +0100 | [diff] [blame] | 146 | /* |
| 147 | * Insert a key into data structures (sdata, sta if necessary) |
| 148 | * to make it used, free old key. |
| 149 | */ |
| 150 | void ieee80211_key_link(struct ieee80211_key *key, |
| 151 | struct ieee80211_sub_if_data *sdata, |
| 152 | struct sta_info *sta); |
Johannes Berg | 11a843b | 2007-08-28 17:01:55 -0400 | [diff] [blame] | 153 | void ieee80211_key_free(struct ieee80211_key *key); |
| 154 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx); |
| 155 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata); |
| 156 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata); |
| 157 | void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata); |
| 158 | |
Johannes Berg | 3b96766 | 2008-04-08 17:56:52 +0200 | [diff] [blame] | 159 | void ieee80211_key_todo(void); |
| 160 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 161 | #endif /* IEEE80211_KEY_H */ |