107 lines
2.6 KiB
C
107 lines
2.6 KiB
C
/*
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* Copyright 2002-2004, Instant802 Networks, Inc.
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* Copyright 2005, Devicescape Software, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef IEEE80211_KEY_H
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#define IEEE80211_KEY_H
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#include <linux/types.h>
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#include <linux/kref.h>
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#include <linux/crypto.h>
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#include <net/mac80211.h>
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/* ALG_TKIP
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* struct ieee80211_key::key is encoded as a 256-bit (32 byte) data block:
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* Temporal Encryption Key (128 bits)
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* Temporal Authenticator Tx MIC Key (64 bits)
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* Temporal Authenticator Rx MIC Key (64 bits)
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*/
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#define WEP_IV_LEN 4
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#define WEP_ICV_LEN 4
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#define ALG_TKIP_KEY_LEN 32
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/* Starting offsets for each key */
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#define ALG_TKIP_TEMP_ENCR_KEY 0
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#define ALG_TKIP_TEMP_AUTH_TX_MIC_KEY 16
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#define ALG_TKIP_TEMP_AUTH_RX_MIC_KEY 24
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#define TKIP_IV_LEN 8
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#define TKIP_ICV_LEN 4
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#define ALG_CCMP_KEY_LEN 16
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#define CCMP_HDR_LEN 8
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#define CCMP_MIC_LEN 8
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#define CCMP_TK_LEN 16
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#define CCMP_PN_LEN 6
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#define NUM_RX_DATA_QUEUES 17
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struct ieee80211_key {
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struct kref kref;
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int hw_key_idx; /* filled and used by low-level driver */
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ieee80211_key_alg alg;
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union {
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struct {
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/* last used TSC */
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u32 iv32;
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u16 iv16;
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u16 p1k[5];
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int tx_initialized;
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/* last received RSC */
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u32 iv32_rx[NUM_RX_DATA_QUEUES];
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u16 iv16_rx[NUM_RX_DATA_QUEUES];
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u16 p1k_rx[NUM_RX_DATA_QUEUES][5];
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int rx_initialized[NUM_RX_DATA_QUEUES];
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} tkip;
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struct {
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u8 tx_pn[6];
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u8 rx_pn[NUM_RX_DATA_QUEUES][6];
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struct crypto_cipher *tfm;
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u32 replays; /* dot11RSNAStatsCCMPReplays */
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/* scratch buffers for virt_to_page() (crypto API) */
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#ifndef AES_BLOCK_LEN
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#define AES_BLOCK_LEN 16
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#endif
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u8 tx_crypto_buf[6 * AES_BLOCK_LEN];
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u8 rx_crypto_buf[6 * AES_BLOCK_LEN];
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} ccmp;
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} u;
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int tx_rx_count; /* number of times this key has been used */
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int keylen;
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/* if the low level driver can provide hardware acceleration it should
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* clear this flag */
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unsigned int force_sw_encrypt:1;
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unsigned int default_tx_key:1; /* This key is the new default TX key
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* (used only for broadcast keys). */
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s8 keyidx; /* WEP key index */
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#ifdef CONFIG_MAC80211_DEBUGFS
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struct {
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struct dentry *stalink;
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struct dentry *dir;
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struct dentry *keylen;
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struct dentry *force_sw_encrypt;
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struct dentry *keyidx;
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struct dentry *hw_key_idx;
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struct dentry *tx_rx_count;
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struct dentry *algorithm;
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struct dentry *tx_spec;
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struct dentry *rx_spec;
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struct dentry *replays;
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struct dentry *key;
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} debugfs;
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#endif
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u8 key[0];
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};
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#endif /* IEEE80211_KEY_H */
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