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hostap/src/rsn_supp/wpa.h
Max Stepanov 73ed03f333 wpa_supplicant: Add GTK RSC relaxation workaround 
Some APs may send RSC octets in EAPOL-Key message 3 of 4-Way Handshake
or in EAPOL-Key message 1 of Group Key Handshake in the opposite byte
order (or by some other corrupted way). Thus, after a successful
EAPOL-Key exchange the TSC values of received multicast packets, such as
DHCP, don't match the RSC one and as a result these packets are dropped
on replay attack TSC verification. An example of such AP is Sapido
RB-1732.

Work around this by setting RSC octets to 0 on GTK installation if the
AP RSC value is identified as a potentially having the byte order issue.
This may open a short window during which older (but valid)
group-addressed frames could be replayed. However, the local receive
counter will be updated on the first received group-addressed frame and
the workaround is enabled only if the common invalid cases are detected,
so this workaround is acceptable as not decreasing security
significantly. The wpa_rsc_relaxation global configuration property
allows the GTK RSC workaround to be disabled if it's not needed.

Signed-off-by: Max Stepanov <Max.Stepanov@intel.com>
2015-11-01 21:00:22 +02:00

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/*
* wpa_supplicant - WPA definitions
* Copyright (c) 2003-2015, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#ifndef WPA_H
#define WPA_H
#include "common/defs.h"
#include "common/eapol_common.h"
#include "common/wpa_common.h"
#include "common/ieee802_11_defs.h"
struct wpa_sm;
struct eapol_sm;
struct wpa_config_blob;
struct hostapd_freq_params;
struct wpa_sm_ctx {
void *ctx; /* pointer to arbitrary upper level context */
void *msg_ctx; /* upper level context for wpa_msg() calls */
void (*set_state)(void *ctx, enum wpa_states state);
enum wpa_states (*get_state)(void *ctx);
void (*deauthenticate)(void * ctx, int reason_code);
int (*set_key)(void *ctx, enum wpa_alg alg,
const u8 *addr, int key_idx, int set_tx,
const u8 *seq, size_t seq_len,
const u8 *key, size_t key_len);
void * (*get_network_ctx)(void *ctx);
int (*get_bssid)(void *ctx, u8 *bssid);
int (*ether_send)(void *ctx, const u8 *dest, u16 proto, const u8 *buf,
size_t len);
int (*get_beacon_ie)(void *ctx);
void (*cancel_auth_timeout)(void *ctx);
u8 * (*alloc_eapol)(void *ctx, u8 type, const void *data, u16 data_len,
size_t *msg_len, void **data_pos);
int (*add_pmkid)(void *ctx, const u8 *bssid, const u8 *pmkid);
int (*remove_pmkid)(void *ctx, const u8 *bssid, const u8 *pmkid);
void (*set_config_blob)(void *ctx, struct wpa_config_blob *blob);
const struct wpa_config_blob * (*get_config_blob)(void *ctx,
const char *name);
int (*mlme_setprotection)(void *ctx, const u8 *addr,
int protection_type, int key_type);
int (*update_ft_ies)(void *ctx, const u8 *md, const u8 *ies,
size_t ies_len);
int (*send_ft_action)(void *ctx, u8 action, const u8 *target_ap,
const u8 *ies, size_t ies_len);
int (*mark_authenticated)(void *ctx, const u8 *target_ap);
#ifdef CONFIG_TDLS
int (*tdls_get_capa)(void *ctx, int *tdls_supported,
int *tdls_ext_setup, int *tdls_chan_switch);
int (*send_tdls_mgmt)(void *ctx, const u8 *dst,
u8 action_code, u8 dialog_token,
u16 status_code, u32 peer_capab,
int initiator, const u8 *buf, size_t len);
int (*tdls_oper)(void *ctx, int oper, const u8 *peer);
int (*tdls_peer_addset)(void *ctx, const u8 *addr, int add, u16 aid,
u16 capability, const u8 *supp_rates,
size_t supp_rates_len,
const struct ieee80211_ht_capabilities *ht_capab,
const struct ieee80211_vht_capabilities *vht_capab,
u8 qosinfo, int wmm, const u8 *ext_capab,
size_t ext_capab_len, const u8 *supp_channels,
size_t supp_channels_len,
const u8 *supp_oper_classes,
size_t supp_oper_classes_len);
int (*tdls_enable_channel_switch)(
void *ctx, const u8 *addr, u8 oper_class,
const struct hostapd_freq_params *params);
int (*tdls_disable_channel_switch)(void *ctx, const u8 *addr);
#endif /* CONFIG_TDLS */
void (*set_rekey_offload)(void *ctx, const u8 *kek, size_t kek_len,
const u8 *kck, size_t kck_len,
const u8 *replay_ctr);
int (*key_mgmt_set_pmk)(void *ctx, const u8 *pmk, size_t pmk_len);
};
enum wpa_sm_conf_params {
RSNA_PMK_LIFETIME /* dot11RSNAConfigPMKLifetime */,
RSNA_PMK_REAUTH_THRESHOLD /* dot11RSNAConfigPMKReauthThreshold */,
RSNA_SA_TIMEOUT /* dot11RSNAConfigSATimeout */,
WPA_PARAM_PROTO,
WPA_PARAM_PAIRWISE,
WPA_PARAM_GROUP,
WPA_PARAM_KEY_MGMT,
WPA_PARAM_MGMT_GROUP,
WPA_PARAM_RSN_ENABLED,
WPA_PARAM_MFP
};
struct rsn_supp_config {
void *network_ctx;
int peerkey_enabled;
int allowed_pairwise_cipher; /* bitfield of WPA_CIPHER_* */
int proactive_key_caching;
int eap_workaround;
void *eap_conf_ctx;
const u8 *ssid;
size_t ssid_len;
int wpa_ptk_rekey;
int p2p;
int wpa_rsc_relaxation;
};
#ifndef CONFIG_NO_WPA
struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx);
void wpa_sm_deinit(struct wpa_sm *sm);
void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid);
void wpa_sm_notify_disassoc(struct wpa_sm *sm);
void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk, size_t pmk_len,
const u8 *bssid);
void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm);
void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth);
void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx);
void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config);
void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr);
void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname,
const char *bridge_ifname);
void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol);
int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len);
int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm, u8 *wpa_ie,
size_t *wpa_ie_len);
int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie, size_t len);
int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie, size_t len);
int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen);
int wpa_sm_set_param(struct wpa_sm *sm, enum wpa_sm_conf_params param,
unsigned int value);
int wpa_sm_get_status(struct wpa_sm *sm, char *buf, size_t buflen,
int verbose);
int wpa_sm_pmf_enabled(struct wpa_sm *sm);
void wpa_sm_key_request(struct wpa_sm *sm, int error, int pairwise);
int wpa_parse_wpa_ie(const u8 *wpa_ie, size_t wpa_ie_len,
struct wpa_ie_data *data);
void wpa_sm_aborted_cached(struct wpa_sm *sm);
int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr,
const u8 *buf, size_t len);
int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data);
int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len);
void wpa_sm_drop_sa(struct wpa_sm *sm);
int wpa_sm_has_ptk(struct wpa_sm *sm);
void wpa_sm_update_replay_ctr(struct wpa_sm *sm, const u8 *replay_ctr);
void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm, void *network_ctx);
int wpa_sm_get_p2p_ip_addr(struct wpa_sm *sm, u8 *buf);
void wpa_sm_set_rx_replay_ctr(struct wpa_sm *sm, const u8 *rx_replay_counter);
void wpa_sm_set_ptk_kck_kek(struct wpa_sm *sm,
const u8 *ptk_kck, size_t ptk_kck_len,
const u8 *ptk_kek, size_t ptk_kek_len);
#else /* CONFIG_NO_WPA */
static inline struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx)
{
return (struct wpa_sm *) 1;
}
static inline void wpa_sm_deinit(struct wpa_sm *sm)
{
}
static inline void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
{
}
static inline void wpa_sm_notify_disassoc(struct wpa_sm *sm)
{
}
static inline void wpa_sm_set_pmk(struct wpa_sm *sm, const u8 *pmk,
size_t pmk_len)
{
}
static inline void wpa_sm_set_pmk_from_pmksa(struct wpa_sm *sm)
{
}
static inline void wpa_sm_set_fast_reauth(struct wpa_sm *sm, int fast_reauth)
{
}
static inline void wpa_sm_set_scard_ctx(struct wpa_sm *sm, void *scard_ctx)
{
}
static inline void wpa_sm_set_config(struct wpa_sm *sm,
struct rsn_supp_config *config)
{
}
static inline void wpa_sm_set_own_addr(struct wpa_sm *sm, const u8 *addr)
{
}
static inline void wpa_sm_set_ifname(struct wpa_sm *sm, const char *ifname,
const char *bridge_ifname)
{
}
static inline void wpa_sm_set_eapol(struct wpa_sm *sm, struct eapol_sm *eapol)
{
}
static inline int wpa_sm_set_assoc_wpa_ie(struct wpa_sm *sm, const u8 *ie,
size_t len)
{
return -1;
}
static inline int wpa_sm_set_assoc_wpa_ie_default(struct wpa_sm *sm,
u8 *wpa_ie,
size_t *wpa_ie_len)
{
return -1;
}
static inline int wpa_sm_set_ap_wpa_ie(struct wpa_sm *sm, const u8 *ie,
size_t len)
{
return -1;
}
static inline int wpa_sm_set_ap_rsn_ie(struct wpa_sm *sm, const u8 *ie,
size_t len)
{
return -1;
}
static inline int wpa_sm_get_mib(struct wpa_sm *sm, char *buf, size_t buflen)
{
return 0;
}
static inline int wpa_sm_set_param(struct wpa_sm *sm,
enum wpa_sm_conf_params param,
unsigned int value)
{
return -1;
}
static inline int wpa_sm_get_status(struct wpa_sm *sm, char *buf,
size_t buflen, int verbose)
{
return 0;
}
static inline int wpa_sm_pmf_enabled(struct wpa_sm *sm)
{
return 0;
}
static inline void wpa_sm_key_request(struct wpa_sm *sm, int error,
int pairwise)
{
}
static inline int wpa_parse_wpa_ie(const u8 *wpa_ie, size_t wpa_ie_len,
struct wpa_ie_data *data)
{
return -1;
}
static inline void wpa_sm_aborted_cached(struct wpa_sm *sm)
{
}
static inline int wpa_sm_rx_eapol(struct wpa_sm *sm, const u8 *src_addr,
const u8 *buf, size_t len)
{
return -1;
}
static inline int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm,
struct wpa_ie_data *data)
{
return -1;
}
static inline int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf,
size_t len)
{
return -1;
}
static inline void wpa_sm_drop_sa(struct wpa_sm *sm)
{
}
static inline int wpa_sm_has_ptk(struct wpa_sm *sm)
{
return 0;
}
static inline void wpa_sm_update_replay_ctr(struct wpa_sm *sm,
const u8 *replay_ctr)
{
}
static inline void wpa_sm_pmksa_cache_flush(struct wpa_sm *sm,
void *network_ctx)
{
}
static inline void wpa_sm_set_rx_replay_ctr(struct wpa_sm *sm,
const u8 *rx_replay_counter)
{
}
static inline void wpa_sm_set_ptk_kck_kek(struct wpa_sm *sm, const u8 *ptk_kck,
const u8 *ptk_kek)
{
}
#endif /* CONFIG_NO_WPA */
#ifdef CONFIG_PEERKEY
int wpa_sm_stkstart(struct wpa_sm *sm, const u8 *peer);
int wpa_sm_rx_eapol_peerkey(struct wpa_sm *sm, const u8 *src_addr,
const u8 *buf, size_t len);
#else /* CONFIG_PEERKEY */
static inline int wpa_sm_stkstart(struct wpa_sm *sm, const u8 *peer)
{
return -1;
}
static inline int wpa_sm_rx_eapol_peerkey(struct wpa_sm *sm, const u8 *src_addr,
const u8 *buf, size_t len)
{
return 0;
}
#endif /* CONFIG_PEERKEY */
#ifdef CONFIG_IEEE80211R
int wpa_sm_set_ft_params(struct wpa_sm *sm, const u8 *ies, size_t ies_len);
int wpa_ft_prepare_auth_request(struct wpa_sm *sm, const u8 *mdie);
int wpa_ft_process_response(struct wpa_sm *sm, const u8 *ies, size_t ies_len,
int ft_action, const u8 *target_ap,
const u8 *ric_ies, size_t ric_ies_len);
int wpa_ft_is_completed(struct wpa_sm *sm);
void wpa_reset_ft_completed(struct wpa_sm *sm);
int wpa_ft_validate_reassoc_resp(struct wpa_sm *sm, const u8 *ies,
size_t ies_len, const u8 *src_addr);
int wpa_ft_start_over_ds(struct wpa_sm *sm, const u8 *target_ap,
const u8 *mdie);
#else /* CONFIG_IEEE80211R */
static inline int
wpa_sm_set_ft_params(struct wpa_sm *sm, const u8 *ies, size_t ies_len)
{
return 0;
}
static inline int wpa_ft_prepare_auth_request(struct wpa_sm *sm,
const u8 *mdie)
{
return 0;
}
static inline int
wpa_ft_process_response(struct wpa_sm *sm, const u8 *ies, size_t ies_len,
int ft_action, const u8 *target_ap)
{
return 0;
}
static inline int wpa_ft_is_completed(struct wpa_sm *sm)
{
return 0;
}
static inline void wpa_reset_ft_completed(struct wpa_sm *sm)
{
}
static inline int
wpa_ft_validate_reassoc_resp(struct wpa_sm *sm, const u8 *ies, size_t ies_len,
const u8 *src_addr)
{
return -1;
}
#endif /* CONFIG_IEEE80211R */
/* tdls.c */
void wpa_tdls_ap_ies(struct wpa_sm *sm, const u8 *ies, size_t len);
void wpa_tdls_assoc_resp_ies(struct wpa_sm *sm, const u8 *ies, size_t len);
int wpa_tdls_start(struct wpa_sm *sm, const u8 *addr);
void wpa_tdls_remove(struct wpa_sm *sm, const u8 *addr);
int wpa_tdls_teardown_link(struct wpa_sm *sm, const u8 *addr, u16 reason_code);
int wpa_tdls_send_discovery_request(struct wpa_sm *sm, const u8 *addr);
int wpa_tdls_init(struct wpa_sm *sm);
void wpa_tdls_teardown_peers(struct wpa_sm *sm);
void wpa_tdls_deinit(struct wpa_sm *sm);
void wpa_tdls_enable(struct wpa_sm *sm, int enabled);
void wpa_tdls_disable_unreachable_link(struct wpa_sm *sm, const u8 *addr);
const char * wpa_tdls_get_link_status(struct wpa_sm *sm, const u8 *addr);
int wpa_tdls_is_external_setup(struct wpa_sm *sm);
int wpa_tdls_enable_chan_switch(struct wpa_sm *sm, const u8 *addr,
u8 oper_class,
struct hostapd_freq_params *freq_params);
int wpa_tdls_disable_chan_switch(struct wpa_sm *sm, const u8 *addr);
int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf);
#endif /* WPA_H */
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