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 32 struct ieee80211_local; 33 struct ieee80211_sub_if_data; 34 struct 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 * @KEY_FLAG_TODO_DEFMGMTKEY: Key is default management key and debugfs needs 50 * to be updated. 51 */ 52 enum ieee80211_internal_key_flags { 53 KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0), 54 KEY_FLAG_TODO_DELETE = BIT(1), 55 KEY_FLAG_TODO_HWACCEL_ADD = BIT(2), 56 KEY_FLAG_TODO_HWACCEL_REMOVE = BIT(3), 57 KEY_FLAG_TODO_DEFKEY = BIT(4), 58 KEY_FLAG_TODO_ADD_DEBUGFS = BIT(5), 59 KEY_FLAG_TODO_DEFMGMTKEY = BIT(6), 60 }; 61 62 enum ieee80211_internal_tkip_state { 63 TKIP_STATE_NOT_INIT, 64 TKIP_STATE_PHASE1_DONE, 65 TKIP_STATE_PHASE1_HW_UPLOADED, 66 }; 67 68 struct tkip_ctx { 69 u32 iv32; 70 u16 iv16; 71 u16 p1k[5]; 72 enum ieee80211_internal_tkip_state state; 73 }; 74 75 struct ieee80211_key { 76 struct ieee80211_local *local; 77 struct ieee80211_sub_if_data *sdata; 78 struct sta_info *sta; 79 80 /* for sdata list */ 81 struct list_head list; 82 /* for todo list */ 83 struct list_head todo; 84 85 /* protected by todo lock! */ 86 unsigned int flags; 87 88 union { 89 struct { 90 /* last used TSC */ 91 struct tkip_ctx tx; 92 93 /* last received RSC */ 94 struct tkip_ctx rx[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 struct { 109 u8 tx_pn[6]; 110 u8 rx_pn[6]; 111 struct crypto_cipher *tfm; 112 u32 replays; /* dot11RSNAStatsCMACReplays */ 113 u32 icverrors; /* dot11RSNAStatsCMACICVErrors */ 114 /* scratch buffers for virt_to_page() (crypto API) */ 115 u8 tx_crypto_buf[2 * AES_BLOCK_LEN]; 116 u8 rx_crypto_buf[2 * AES_BLOCK_LEN]; 117 } aes_cmac; 118 } u; 119 120 /* number of times this key has been used */ 121 int tx_rx_count; 122 123 #ifdef CONFIG_MAC80211_DEBUGFS 124 struct { 125 struct dentry *stalink; 126 struct dentry *dir; 127 int cnt; 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 }; 137 138 struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg, 139 int idx, 140 size_t key_len, 141 const u8 *key_data, 142 size_t seq_len, const u8 *seq); 143 /* 144 * Insert a key into data structures (sdata, sta if necessary) 145 * to make it used, free old key. 146 */ 147 void ieee80211_key_link(struct ieee80211_key *key, 148 struct ieee80211_sub_if_data *sdata, 149 struct sta_info *sta); 150 void ieee80211_key_free(struct ieee80211_key *key); 151 void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx); 152 void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, 153 int idx); 154 void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata); 155 void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata); 156 void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata); 157 158 void ieee80211_key_todo(void); 159 160 #endif /* IEEE80211_KEY_H */ 161