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hostapd/src/ap/wpa_auth_i.h
Jouni Malinen 3d6953288b Extend RESEND_* test commands to allow forcing plaintext TX 
This allows hostapd testing functionality to be forced to send out a
plaintext EAPOL-Key frame with the RESEND_* command. That can be useful
in seeing how the station behaves if an unencrypted EAPOL frame is
received when TK is already configured.

This is not really perfect since there is no convenient way of sending
out a single unencrypted frame in the current nl80211 design. The
monitor interface could likely still do this, but that's not really
supposed to be used anymore. For now, clear and restore TK during this
operation. The restore part is not really working correctly, though,
since it ends up clearing the TSC value on the AP side and that shows up
as replay protection issues on the station. Anyway, this is sufficient
to generate sniffer captures to analyze station behavior.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2017-10-19 18:32:16 +03:00

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/*
* hostapd - IEEE 802.11i-2004 / WPA Authenticator: Internal definitions
* Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#ifndef WPA_AUTH_I_H
#define WPA_AUTH_I_H
#include "utils/list.h"
/* max(dot11RSNAConfigGroupUpdateCount,dot11RSNAConfigPairwiseUpdateCount) */
#define RSNA_MAX_EAPOL_RETRIES 4
struct wpa_group;
struct wpa_state_machine {
struct wpa_authenticator *wpa_auth;
struct wpa_group *group;
u8 addr[ETH_ALEN];
u8 p2p_dev_addr[ETH_ALEN];
enum {
WPA_PTK_INITIALIZE, WPA_PTK_DISCONNECT, WPA_PTK_DISCONNECTED,
WPA_PTK_AUTHENTICATION, WPA_PTK_AUTHENTICATION2,
WPA_PTK_INITPMK, WPA_PTK_INITPSK, WPA_PTK_PTKSTART,
WPA_PTK_PTKCALCNEGOTIATING, WPA_PTK_PTKCALCNEGOTIATING2,
WPA_PTK_PTKINITNEGOTIATING, WPA_PTK_PTKINITDONE
} wpa_ptk_state;
enum {
WPA_PTK_GROUP_IDLE = 0,
WPA_PTK_GROUP_REKEYNEGOTIATING,
WPA_PTK_GROUP_REKEYESTABLISHED,
WPA_PTK_GROUP_KEYERROR
} wpa_ptk_group_state;
Boolean Init;
Boolean DeauthenticationRequest;
Boolean AuthenticationRequest;
Boolean ReAuthenticationRequest;
Boolean Disconnect;
u16 disconnect_reason; /* specific reason code to use with Disconnect */
u32 TimeoutCtr;
u32 GTimeoutCtr;
Boolean TimeoutEvt;
Boolean EAPOLKeyReceived;
Boolean EAPOLKeyPairwise;
Boolean EAPOLKeyRequest;
Boolean MICVerified;
Boolean GUpdateStationKeys;
u8 ANonce[WPA_NONCE_LEN];
u8 SNonce[WPA_NONCE_LEN];
u8 alt_SNonce[WPA_NONCE_LEN];
u8 alt_replay_counter[WPA_REPLAY_COUNTER_LEN];
u8 PMK[PMK_LEN_MAX];
unsigned int pmk_len;
struct wpa_ptk PTK;
Boolean PTK_valid;
Boolean pairwise_set;
Boolean tk_already_set;
int keycount;
Boolean Pair;
struct wpa_key_replay_counter {
u8 counter[WPA_REPLAY_COUNTER_LEN];
Boolean valid;
} key_replay[RSNA_MAX_EAPOL_RETRIES],
prev_key_replay[RSNA_MAX_EAPOL_RETRIES];
Boolean PInitAKeys; /* WPA only, not in IEEE 802.11i */
Boolean PTKRequest; /* not in IEEE 802.11i state machine */
Boolean has_GTK;
Boolean PtkGroupInit; /* init request for PTK Group state machine */
u8 *last_rx_eapol_key; /* starting from IEEE 802.1X header */
size_t last_rx_eapol_key_len;
unsigned int changed:1;
unsigned int in_step_loop:1;
unsigned int pending_deinit:1;
unsigned int started:1;
unsigned int mgmt_frame_prot:1;
unsigned int rx_eapol_key_secure:1;
unsigned int update_snonce:1;
unsigned int alt_snonce_valid:1;
#ifdef CONFIG_IEEE80211R_AP
unsigned int ft_completed:1;
unsigned int pmk_r1_name_valid:1;
#endif /* CONFIG_IEEE80211R_AP */
unsigned int is_wnmsleep:1;
u8 req_replay_counter[WPA_REPLAY_COUNTER_LEN];
int req_replay_counter_used;
u8 *wpa_ie;
size_t wpa_ie_len;
enum {
WPA_VERSION_NO_WPA = 0 /* WPA not used */,
WPA_VERSION_WPA = 1 /* WPA / IEEE 802.11i/D3.0 */,
WPA_VERSION_WPA2 = 2 /* WPA2 / IEEE 802.11i */
} wpa;
int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
int wpa_key_mgmt; /* the selected WPA_KEY_MGMT_* */
struct rsn_pmksa_cache_entry *pmksa;
u32 dot11RSNAStatsTKIPLocalMICFailures;
u32 dot11RSNAStatsTKIPRemoteMICFailures;
#ifdef CONFIG_IEEE80211R_AP
u8 xxkey[PMK_LEN]; /* PSK or the second 256 bits of MSK */
size_t xxkey_len;
u8 pmk_r1_name[WPA_PMK_NAME_LEN]; /* PMKR1Name derived from FT Auth
* Request */
u8 r0kh_id[FT_R0KH_ID_MAX_LEN]; /* R0KH-ID from FT Auth Request */
size_t r0kh_id_len;
u8 sup_pmk_r1_name[WPA_PMK_NAME_LEN]; /* PMKR1Name from EAPOL-Key
* message 2/4 */
u8 *assoc_resp_ftie;
void (*ft_pending_cb)(void *ctx, const u8 *dst, const u8 *bssid,
u16 auth_transaction, u16 status,
const u8 *ies, size_t ies_len);
void *ft_pending_cb_ctx;
struct wpabuf *ft_pending_req_ies;
u8 ft_pending_pull_nonce[FT_RRB_NONCE_LEN];
u8 ft_pending_auth_transaction;
u8 ft_pending_current_ap[ETH_ALEN];
int ft_pending_pull_left_retries;
#endif /* CONFIG_IEEE80211R_AP */
int pending_1_of_4_timeout;
#ifdef CONFIG_P2P
u8 ip_addr[4];
#endif /* CONFIG_P2P */
#ifdef CONFIG_FILS
u8 fils_key_auth_sta[FILS_MAX_KEY_AUTH_LEN];
u8 fils_key_auth_ap[FILS_MAX_KEY_AUTH_LEN];
size_t fils_key_auth_len;
unsigned int fils_completed:1;
#endif /* CONFIG_FILS */
#ifdef CONFIG_TESTING_OPTIONS
void (*eapol_status_cb)(void *ctx1, void *ctx2);
void *eapol_status_cb_ctx1;
void *eapol_status_cb_ctx2;
#endif /* CONFIG_TESTING_OPTIONS */
};
/* per group key state machine data */
struct wpa_group {
struct wpa_group *next;
int vlan_id;
Boolean GInit;
int GKeyDoneStations;
Boolean GTKReKey;
int GTK_len;
int GN, GM;
Boolean GTKAuthenticator;
u8 Counter[WPA_NONCE_LEN];
enum {
WPA_GROUP_GTK_INIT = 0,
WPA_GROUP_SETKEYS, WPA_GROUP_SETKEYSDONE,
WPA_GROUP_FATAL_FAILURE
} wpa_group_state;
u8 GMK[WPA_GMK_LEN];
u8 GTK[2][WPA_GTK_MAX_LEN];
u8 GNonce[WPA_NONCE_LEN];
Boolean changed;
Boolean first_sta_seen;
Boolean reject_4way_hs_for_entropy;
#ifdef CONFIG_IEEE80211W
u8 IGTK[2][WPA_IGTK_MAX_LEN];
int GN_igtk, GM_igtk;
#endif /* CONFIG_IEEE80211W */
/* Number of references except those in struct wpa_group->next */
unsigned int references;
unsigned int num_setup_iface;
};
struct wpa_ft_pmk_cache;
/* per authenticator data */
struct wpa_authenticator {
struct wpa_group *group;
unsigned int dot11RSNAStatsTKIPRemoteMICFailures;
u32 dot11RSNAAuthenticationSuiteSelected;
u32 dot11RSNAPairwiseCipherSelected;
u32 dot11RSNAGroupCipherSelected;
u8 dot11RSNAPMKIDUsed[PMKID_LEN];
u32 dot11RSNAAuthenticationSuiteRequested; /* FIX: update */
u32 dot11RSNAPairwiseCipherRequested; /* FIX: update */
u32 dot11RSNAGroupCipherRequested; /* FIX: update */
unsigned int dot11RSNATKIPCounterMeasuresInvoked;
unsigned int dot11RSNA4WayHandshakeFailures;
struct wpa_auth_config conf;
const struct wpa_auth_callbacks *cb;
void *cb_ctx;
u8 *wpa_ie;
size_t wpa_ie_len;
u8 addr[ETH_ALEN];
struct rsn_pmksa_cache *pmksa;
struct wpa_ft_pmk_cache *ft_pmk_cache;
#ifdef CONFIG_P2P
struct bitfield *ip_pool;
#endif /* CONFIG_P2P */
};
#ifdef CONFIG_IEEE80211R_AP
#define FT_REMOTE_SEQ_BACKLOG 16
struct ft_remote_seq_rx {
u32 dom;
struct os_reltime time_offset; /* local time - offset = remote time */
/* accepted sequence numbers: (offset ... offset + 0x40000000]
* (except those in last)
* dropped sequence numbers: (offset - 0x40000000 ... offset]
* all others trigger SEQ_REQ message (except first message)
*/
u32 last[FT_REMOTE_SEQ_BACKLOG];
unsigned int num_last;
u32 offsetidx;
struct dl_list queue; /* send nonces + rrb msgs awaiting seq resp */
};
struct ft_remote_seq_tx {
u32 dom; /* non zero if initialized */
u32 seq;
};
struct ft_remote_seq {
struct ft_remote_seq_rx rx;
struct ft_remote_seq_tx tx;
};
#endif /* CONFIG_IEEE80211R_AP */
int wpa_write_rsn_ie(struct wpa_auth_config *conf, u8 *buf, size_t len,
const u8 *pmkid);
void wpa_auth_logger(struct wpa_authenticator *wpa_auth, const u8 *addr,
logger_level level, const char *txt);
void wpa_auth_vlogger(struct wpa_authenticator *wpa_auth, const u8 *addr,
logger_level level, const char *fmt, ...);
void __wpa_send_eapol(struct wpa_authenticator *wpa_auth,
struct wpa_state_machine *sm, int key_info,
const u8 *key_rsc, const u8 *nonce,
const u8 *kde, size_t kde_len,
int keyidx, int encr, int force_version);
int wpa_auth_for_each_sta(struct wpa_authenticator *wpa_auth,
int (*cb)(struct wpa_state_machine *sm, void *ctx),
void *cb_ctx);
int wpa_auth_for_each_auth(struct wpa_authenticator *wpa_auth,
int (*cb)(struct wpa_authenticator *a, void *ctx),
void *cb_ctx);
#ifdef CONFIG_IEEE80211R_AP
int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len);
int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id,
size_t r0kh_id_len,
const u8 *anonce, const u8 *snonce,
u8 *buf, size_t len, const u8 *subelem,
size_t subelem_len);
int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
struct wpa_ptk *ptk);
struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void);
void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache);
void wpa_ft_install_ptk(struct wpa_state_machine *sm);
int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
const u8 *spa, const u8 *pmk_r0,
const u8 *pmk_r0_name, int pairwise);
#endif /* CONFIG_IEEE80211R_AP */
#endif /* WPA_AUTH_I_H */
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