| 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> |
| 14 | #include <linux/kref.h> |
| 15 | #include <linux/crypto.h> |
| 16 | #include <net/mac80211.h> |
| 17 | |
| 18 | /* ALG_TKIP |
| 19 | * struct ieee80211_key::key is encoded as a 256-bit (32 byte) data block: |
| 20 | * Temporal Encryption Key (128 bits) |
| 21 | * Temporal Authenticator Tx MIC Key (64 bits) |
| 22 | * Temporal Authenticator Rx MIC Key (64 bits) |
| 23 | */ |
| 24 | |
| 25 | #define WEP_IV_LEN 4 |
| 26 | #define WEP_ICV_LEN 4 |
| 27 | |
| 28 | #define ALG_TKIP_KEY_LEN 32 |
| 29 | /* Starting offsets for each key */ |
| 30 | #define ALG_TKIP_TEMP_ENCR_KEY 0 |
| 31 | #define ALG_TKIP_TEMP_AUTH_TX_MIC_KEY 16 |
| 32 | #define ALG_TKIP_TEMP_AUTH_RX_MIC_KEY 24 |
| 33 | #define TKIP_IV_LEN 8 |
| 34 | #define TKIP_ICV_LEN 4 |
| 35 | |
| 36 | #define ALG_CCMP_KEY_LEN 16 |
| 37 | #define CCMP_HDR_LEN 8 |
| 38 | #define CCMP_MIC_LEN 8 |
| 39 | #define CCMP_TK_LEN 16 |
| 40 | #define CCMP_PN_LEN 6 |
| 41 | |
| 42 | #define NUM_RX_DATA_QUEUES 17 |
| 43 | |
| 44 | struct ieee80211_key { |
| 45 | struct kref kref; |
| 46 | |
| 47 | int hw_key_idx; /* filled and used by low-level driver */ |
| 48 | ieee80211_key_alg alg; |
| 49 | union { |
| 50 | struct { |
| 51 | /* last used TSC */ |
| 52 | u32 iv32; |
| 53 | u16 iv16; |
| 54 | u16 p1k[5]; |
| 55 | int tx_initialized; |
| 56 | |
| 57 | /* last received RSC */ |
| 58 | u32 iv32_rx[NUM_RX_DATA_QUEUES]; |
| 59 | u16 iv16_rx[NUM_RX_DATA_QUEUES]; |
| 60 | u16 p1k_rx[NUM_RX_DATA_QUEUES][5]; |
| 61 | int rx_initialized[NUM_RX_DATA_QUEUES]; |
| 62 | } tkip; |
| 63 | struct { |
| 64 | u8 tx_pn[6]; |
| 65 | u8 rx_pn[NUM_RX_DATA_QUEUES][6]; |
| 66 | struct crypto_cipher *tfm; |
| 67 | u32 replays; /* dot11RSNAStatsCCMPReplays */ |
| 68 | /* scratch buffers for virt_to_page() (crypto API) */ |
| 69 | #ifndef AES_BLOCK_LEN |
| 70 | #define AES_BLOCK_LEN 16 |
| 71 | #endif |
| 72 | u8 tx_crypto_buf[6 * AES_BLOCK_LEN]; |
| 73 | u8 rx_crypto_buf[6 * AES_BLOCK_LEN]; |
| 74 | } ccmp; |
| 75 | } u; |
| 76 | int tx_rx_count; /* number of times this key has been used */ |
| 77 | int keylen; |
| 78 | |
| 79 | /* if the low level driver can provide hardware acceleration it should |
| 80 | * clear this flag */ |
| 81 | unsigned int force_sw_encrypt:1; |
| 82 | unsigned int default_tx_key:1; /* This key is the new default TX key |
| 83 | * (used only for broadcast keys). */ |
| 84 | s8 keyidx; /* WEP key index */ |
| 85 | |
| 86 | u8 key[0]; |
| 87 | }; |
| 88 | |
| 89 | #endif /* IEEE80211_KEY_H */ |