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 */ 42 enum ieee80211_internal_key_flags { 43 KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0), 44 }; 45 46 enum ieee80211_internal_tkip_state { 47 TKIP_STATE_NOT_INIT, 48 TKIP_STATE_PHASE1_DONE, 49 TKIP_STATE_PHASE1_HW_UPLOADED, 50 }; 51 52 struct tkip_ctx { 53 u32 iv32; 54 u16 iv16; 55 u16 p1k[5]; 56 enum ieee80211_internal_tkip_state state; 57 }; 58 59 struct ieee80211_key { 60 struct ieee80211_local *local; 61 struct ieee80211_sub_if_data *sdata; 62 struct sta_info *sta; 63 64 /* for sdata list */ 65 struct list_head list; 66 67 /* protected by key mutex */ 68 unsigned int flags; 69 70 union { 71 struct { 72 /* last used TSC */ 73 struct tkip_ctx tx; 74 75 /* last received RSC */ 76 struct tkip_ctx rx[NUM_RX_DATA_QUEUES]; 77 } tkip; 78 struct { 79 u8 tx_pn[6]; 80 /* 81 * Last received packet number. The first 82 * NUM_RX_DATA_QUEUES counters are used with Data 83 * frames and the last counter is used with Robust 84 * Management frames. 85 */ 86 u8 rx_pn[NUM_RX_DATA_QUEUES + 1][6]; 87 struct crypto_cipher *tfm; 88 u32 replays; /* dot11RSNAStatsCCMPReplays */ 89 /* scratch buffers for virt_to_page() (crypto API) */ 90 #ifndef AES_BLOCK_LEN 91 #define AES_BLOCK_LEN 16 92 #endif 93 u8 tx_crypto_buf[6 * AES_BLOCK_LEN]; 94 u8 rx_crypto_buf[6 * AES_BLOCK_LEN]; 95 } ccmp; 96 struct { 97 u8 tx_pn[6]; 98 u8 rx_pn[6]; 99 struct crypto_cipher *tfm; 100 u32 replays; /* dot11RSNAStatsCMACReplays */ 101 u32 icverrors; /* dot11RSNAStatsCMACICVErrors */ 102 /* scratch buffers for virt_to_page() (crypto API) */ 103 u8 tx_crypto_buf[2 * AES_BLOCK_LEN]; 104 u8 rx_crypto_buf[2 * AES_BLOCK_LEN]; 105 } aes_cmac; 106 } u; 107 108 /* number of times this key has been used */ 109 int tx_rx_count; 110 111 #ifdef CONFIG_MAC80211_DEBUGFS 112 struct { 113 struct dentry *stalink; 114 struct dentry *dir; 115 int cnt; 116 } debugfs; 117 #endif 118 119 /* 120 * key config, must be last because it contains key 121 * material as variable length member 122 */ 123 struct ieee80211_key_conf conf; 124 }; 125 126 struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg, 127 int idx, 128 size_t key_len, 129 const u8 *key_data, 130 size_t seq_len, const u8 *seq); 131 /* 132 * Insert a key into data structures (sdata, sta if necessary) 133 * to make it used, free old key. 134 */ 135 void ieee80211_key_link(struct ieee80211_key *key, 136 struct ieee80211_sub_if_data *sdata, 137 struct sta_info *sta); 138 void ieee80211_key_free(struct ieee80211_local *local, 139 struct ieee80211_key *key); 140 void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx); 141 void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, 142 int idx); 143 void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata); 144 void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata); 145 void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata); 146 147 #endif /* IEEE80211_KEY_H */ 148