3cfcf6ac6d
Add mechanism for managing BIP keys (IGTK) and integrate BIP into the TX/RX paths. Signed-off-by: Jouni Malinen <j@w1.fi> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
165 lines
4.4 KiB
C
165 lines
4.4 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/list.h>
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#include <linux/crypto.h>
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#include <linux/rcupdate.h>
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#include <net/mac80211.h>
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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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#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 TKIP_IV_LEN 8
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#define TKIP_ICV_LEN 4
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#define NUM_RX_DATA_QUEUES 17
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struct ieee80211_local;
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struct ieee80211_sub_if_data;
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struct sta_info;
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/**
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* enum ieee80211_internal_key_flags - internal key flags
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*
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* @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
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* in the hardware for TX crypto hardware acceleration.
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* @KEY_FLAG_TODO_DELETE: Key is marked for deletion and will, after an
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* RCU grace period, no longer be reachable other than from the
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* todo list.
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* @KEY_FLAG_TODO_HWACCEL_ADD: Key needs to be added to hardware acceleration.
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* @KEY_FLAG_TODO_HWACCEL_REMOVE: Key needs to be removed from hardware
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* acceleration.
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* @KEY_FLAG_TODO_DEFKEY: Key is default key and debugfs needs to be updated.
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* @KEY_FLAG_TODO_ADD_DEBUGFS: Key needs to be added to debugfs.
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* @KEY_FLAG_TODO_DEFMGMTKEY: Key is default management key and debugfs needs
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* to be updated.
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*/
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enum ieee80211_internal_key_flags {
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KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0),
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KEY_FLAG_TODO_DELETE = BIT(1),
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KEY_FLAG_TODO_HWACCEL_ADD = BIT(2),
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KEY_FLAG_TODO_HWACCEL_REMOVE = BIT(3),
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KEY_FLAG_TODO_DEFKEY = BIT(4),
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KEY_FLAG_TODO_ADD_DEBUGFS = BIT(5),
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KEY_FLAG_TODO_DEFMGMTKEY = BIT(6),
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};
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struct tkip_ctx {
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u32 iv32;
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u16 iv16;
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u16 p1k[5];
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int initialized;
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};
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struct ieee80211_key {
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struct ieee80211_local *local;
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struct ieee80211_sub_if_data *sdata;
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struct sta_info *sta;
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/* for sdata list */
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struct list_head list;
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/* for todo list */
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struct list_head todo;
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/* protected by todo lock! */
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unsigned int flags;
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union {
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struct {
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/* last used TSC */
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struct tkip_ctx tx;
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/* last received RSC */
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struct tkip_ctx rx[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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struct {
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u8 tx_pn[6];
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u8 rx_pn[6];
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struct crypto_cipher *tfm;
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u32 replays; /* dot11RSNAStatsCMACReplays */
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u32 icverrors; /* dot11RSNAStatsCMACICVErrors */
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/* scratch buffers for virt_to_page() (crypto API) */
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u8 tx_crypto_buf[2 * AES_BLOCK_LEN];
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u8 rx_crypto_buf[2 * AES_BLOCK_LEN];
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} aes_cmac;
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} u;
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/* number of times this key has been used */
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int tx_rx_count;
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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 *flags;
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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 *icverrors;
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struct dentry *key;
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struct dentry *ifindex;
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int cnt;
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} debugfs;
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#endif
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/*
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* key config, must be last because it contains key
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* material as variable length member
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*/
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struct ieee80211_key_conf conf;
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};
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struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
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int idx,
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size_t key_len,
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const u8 *key_data);
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/*
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* Insert a key into data structures (sdata, sta if necessary)
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* to make it used, free old key.
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*/
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void ieee80211_key_link(struct ieee80211_key *key,
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struct ieee80211_sub_if_data *sdata,
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struct sta_info *sta);
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void ieee80211_key_free(struct ieee80211_key *key);
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void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx);
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void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata,
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int idx);
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void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata);
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void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
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void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata);
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void ieee80211_key_todo(void);
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#endif /* IEEE80211_KEY_H */
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