target/linux/package/ieee80211-dscape/src/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 /* ALG_TKIP
  14  * struct ieee80211_key::key is encoded as a 256-bit (32 byte) data block:
  15  * Temporal Encryption Key (128 bits)
  16  * Temporal Authenticator Tx MIC Key (64 bits)
  17  * Temporal Authenticator Rx MIC Key (64 bits)
  18  */
  19
  20 #define WEP_IV_LEN 4
  21 #define WEP_ICV_LEN 4
  22
  23 #define ALG_TKIP_KEY_LEN 32
  24 /* Starting offsets for each key */
  25 #define ALG_TKIP_TEMP_ENCR_KEY 0
  26 #define ALG_TKIP_TEMP_AUTH_TX_MIC_KEY 16
  27 #define ALG_TKIP_TEMP_AUTH_RX_MIC_KEY 24
  28 #define TKIP_IV_LEN 8
  29 #define TKIP_ICV_LEN 4
  30
  31 #define ALG_CCMP_KEY_LEN 16
  32 #define CCMP_HDR_LEN 8
  33 #define CCMP_MIC_LEN 8
  34 #define CCMP_TK_LEN 16
  35 #define CCMP_PN_LEN 6
  36
  37 #define NUM_RX_DATA_QUEUES 17
  38
  39 struct ieee80211_key {
  40         int hw_key_idx; /* filled and used by low-level driver */
  41         ieee80211_key_alg alg;
  42         union {
  43                 struct {
  44                         /* last used TSC */
  45                         u32 iv32;
  46                         u16 iv16;
  47                         u16 p1k[5];
  48                         int tx_initialized;
  49
  50                         /* last received RSC */
  51                         u32 iv32_rx[NUM_RX_DATA_QUEUES];
  52                         u16 iv16_rx[NUM_RX_DATA_QUEUES];
  53                         u16 p1k_rx[NUM_RX_DATA_QUEUES][5];
  54                         int rx_initialized[NUM_RX_DATA_QUEUES];
  55                 } tkip;
  56                 struct {
  57                         u8 tx_pn[6];
  58                         /* TODO: for WME make this replay counter per AC */
  59                         u8 rx_pn[NUM_RX_DATA_QUEUES][6];
  60 #ifndef AES_STATE_LEN
  61 #define AES_STATE_LEN 44
  62 #endif
  63                         u32 aes_state[AES_STATE_LEN];
  64                         u32 replays; /* dot11RSNAStatsCCMPReplays */
  65                 } ccmp;
  66         } u;
  67         int tx_rx_count; /* number of times this key has been used */
  68         int keylen;
  69
  70         /* if the low level driver can provide hardware acceleration it should
  71          * clear this flag */
  72         int force_sw_encrypt:1;
  73         int keyidx:8; /* WEP key index */
  74         int default_tx_key:1; /* This key is the new default TX key
  75                                * (used only for broadcast keys). */
  76
  77         u8 key[0];
  78 };
  79
  80 #endif /* IEEE80211_KEY_H */