/* * Copyright 2002-2004, Instant802 Networks, Inc. * Copyright 2005, Devicescape Software, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef IEEE80211_KEY_H #define IEEE80211_KEY_H #include <linux/types.h> #include <linux/list.h> #include <linux/crypto.h> #include <linux/rcupdate.h> #include <net/mac80211.h> #define NUM_DEFAULT_KEYS 4 #define NUM_DEFAULT_MGMT_KEYS 2 struct ieee80211_local; struct ieee80211_sub_if_data; struct sta_info; /** * enum ieee80211_internal_key_flags - internal key flags * * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present * in the hardware for TX crypto hardware acceleration. * @KEY_FLAG_TAINTED: Key is tainted and packets should be dropped. */ enum ieee80211_internal_key_flags { KEY_FLAG_UPLOADED_TO_HARDWARE = BIT(0), KEY_FLAG_TAINTED = BIT(1), }; enum ieee80211_internal_tkip_state { TKIP_STATE_NOT_INIT, TKIP_STATE_PHASE1_DONE, TKIP_STATE_PHASE1_HW_UPLOADED, }; struct tkip_ctx { u32 iv32; /* current iv32 */ u16 iv16; /* current iv16 */ u16 p1k[5]; /* p1k cache */ u32 p1k_iv32; /* iv32 for which p1k computed */ enum ieee80211_internal_tkip_state state; }; struct ieee80211_key { struct ieee80211_local *local; struct ieee80211_sub_if_data *sdata; struct sta_info *sta; /* for sdata list */ struct list_head list; /* protected by key mutex */ unsigned int flags; union { struct { /* protects tx context */ spinlock_t txlock; /* last used TSC */ struct tkip_ctx tx; /* last received RSC */ struct tkip_ctx rx[IEEE80211_NUM_TIDS]; /* number of mic failures */ u32 mic_failures; } tkip; struct { atomic64_t tx_pn; /* * Last received packet number. The first * IEEE80211_NUM_TIDS counters are used with Data * frames and the last counter is used with Robust * Management frames. */ u8 rx_pn[IEEE80211_NUM_TIDS + 1][IEEE80211_CCMP_PN_LEN]; struct crypto_cipher *tfm; u32 replays; /* dot11RSNAStatsCCMPReplays */ } ccmp; struct { atomic64_t tx_pn; u8 rx_pn[IEEE80211_CMAC_PN_LEN]; struct crypto_cipher *tfm; u32 replays; /* dot11RSNAStatsCMACReplays */ u32 icverrors; /* dot11RSNAStatsCMACICVErrors */ } aes_cmac; } u; /* number of times this key has been used */ int tx_rx_count; #ifdef CONFIG_MAC80211_DEBUGFS struct { struct dentry *stalink; struct dentry *dir; int cnt; } debugfs; #endif /* * key config, must be last because it contains key * material as variable length member */ struct ieee80211_key_conf conf; }; struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len, const u8 *key_data, size_t seq_len, const u8 *seq); /* * Insert a key into data structures (sdata, sta if necessary) * to make it used, free old key. On failure, also free the new key. */ int ieee80211_key_link(struct ieee80211_key *key, struct ieee80211_sub_if_data *sdata, struct sta_info *sta); void ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom); void ieee80211_key_free_unused(struct ieee80211_key *key); void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx, bool uni, bool multi); void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, int idx); void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata); void ieee80211_free_sta_keys(struct ieee80211_local *local, struct sta_info *sta); void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata); #define key_mtx_dereference(local, ref) \ rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx))) void ieee80211_delayed_tailroom_dec(struct work_struct *wk); #endif /* IEEE80211_KEY_H */