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 44struct 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#ifdef CONFIG_MAC80211_DEBUGFS 87 struct { 88 struct dentry *stalink; 89 struct dentry *dir; 90 struct dentry *keylen; 91 struct dentry *force_sw_encrypt; 92 struct dentry *keyidx; 93 struct dentry *hw_key_idx; 94 struct dentry *tx_rx_count; 95 struct dentry *algorithm; 96 struct dentry *tx_spec; 97 struct dentry *rx_spec; 98 struct dentry *replays; 99 struct dentry *key; 100 } debugfs; 101#endif 102 103 u8 key[0]; 104}; 105 106#endif /* IEEE80211_KEY_H */ 107