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245fc96e5f
fragattacks/src/ap/wpa_auth.h
Michael Braun 245fc96e5f FT: New RRB message format 
Convert FT RRB into a new TLV based format. Use AES-SIV as AEAD cipher
to protect the messages.

This needs at least 32 byte long keys. These can be provided either
by a config file change or letting a KDF derive the 32 byte key used
from the 16 byte key given.

This breaks backward compatibility, i.e., hostapd needs to be updated on
all APs at the same time to allow FT to remain functional.

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
2017-05-03 21:55:29 +03:00

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/*
* hostapd - IEEE 802.11i-2004 / WPA Authenticator
* Copyright (c) 2004-2017, 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_H
#define WPA_AUTH_H
#include "common/defs.h"
#include "common/eapol_common.h"
#include "common/wpa_common.h"
#include "common/ieee802_11_defs.h"
#define MAX_OWN_IE_OVERRIDE 256
#ifdef _MSC_VER
#pragma pack(push, 1)
#endif /* _MSC_VER */
/* IEEE Std 802.11r-2008, 11A.10.3 - Remote request/response frame definition
*/
struct ft_rrb_frame {
u8 frame_type; /* RSN_REMOTE_FRAME_TYPE_FT_RRB */
u8 packet_type; /* FT_PACKET_REQUEST/FT_PACKET_RESPONSE */
le16 action_length; /* little endian length of action_frame */
u8 ap_address[ETH_ALEN];
/*
* Followed by action_length bytes of FT Action frame (from Category
* field to the end of Action Frame body.
*/
} STRUCT_PACKED;
#define RSN_REMOTE_FRAME_TYPE_FT_RRB 1
#define FT_PACKET_REQUEST 0
#define FT_PACKET_RESPONSE 1
/* Vendor-specific types for R0KH-R1KH protocol; not defined in 802.11r. These
* use OUI Extended EtherType as the encapsulating format. */
#define FT_PACKET_R0KH_R1KH_PULL 0x01
#define FT_PACKET_R0KH_R1KH_RESP 0x02
#define FT_PACKET_R0KH_R1KH_PUSH 0x03
/* packet layout
* IEEE 802 extended OUI ethertype frame header
* u16 authlen (little endian)
* multiple of struct ft_rrb_tlv (authenticated only, length = authlen)
* multiple of struct ft_rrb_tlv (AES-SIV encrypted, AES-SIV needs an extra
* blocksize length)
*
* AES-SIV AAD;
* source MAC address (6)
* authenticated-only TLVs (authlen)
* subtype (1; FT_PACKET_*)
*/
#define FT_RRB_NONCE_LEN 16
#define FT_RRB_LAST_EMPTY 0 /* placeholder or padding */
#define FT_RRB_NONCE 2 /* size FT_RRB_NONCE_LEN */
#define FT_RRB_TIMESTAMP 3 /* le32 unix seconds */
#define FT_RRB_R0KH_ID 4 /* FT_R0KH_ID_MAX_LEN */
#define FT_RRB_R1KH_ID 5 /* FT_R1KH_ID_LEN */
#define FT_RRB_S1KH_ID 6 /* ETH_ALEN */
#define FT_RRB_PMK_R0_NAME 7 /* WPA_PMK_NAME_LEN */
#define FT_RRB_PMK_R0 8 /* PMK_LEN */
#define FT_RRB_PMK_R1_NAME 9 /* WPA_PMK_NAME_LEN */
#define FT_RRB_PMK_R1 10 /* PMK_LEN */
#define FT_RRB_PAIRWISE 11 /* le16 */
struct ft_rrb_tlv {
le16 type;
le16 len;
/* followed by data of length len */
} STRUCT_PACKED;
/* session TLVs:
* required: PMK_R1, PMK_R1_NAME, PAIRWISE
*
* pull frame TLVs:
* auth:
* required: NONCE, R0KH_ID, R1KH_ID
* encrypted:
* required: PMK_R0_NAME, S1KH_ID
*
* response frame TLVs:
* auth:
* required: NONCE, R0KH_ID, R1KH_ID
* encrypted:
* required: S1KH_ID, session TLVs
*
* push frame TLVs:
* auth:
* required: TIMESTAMP, R0KH_ID, R1KH_ID
* encrypted:
* required: S1KH_ID, PMK_R0_NAME, session TLVs
*/
#ifdef _MSC_VER
#pragma pack(pop)
#endif /* _MSC_VER */
/* per STA state machine data */
struct wpa_authenticator;
struct wpa_state_machine;
struct rsn_pmksa_cache_entry;
struct eapol_state_machine;
struct ft_remote_r0kh {
struct ft_remote_r0kh *next;
u8 addr[ETH_ALEN];
u8 id[FT_R0KH_ID_MAX_LEN];
size_t id_len;
u8 key[32];
};
struct ft_remote_r1kh {
struct ft_remote_r1kh *next;
u8 addr[ETH_ALEN];
u8 id[FT_R1KH_ID_LEN];
u8 key[32];
};
struct wpa_auth_config {
int wpa;
int wpa_key_mgmt;
int wpa_pairwise;
int wpa_group;
int wpa_group_rekey;
int wpa_strict_rekey;
int wpa_gmk_rekey;
int wpa_ptk_rekey;
u32 wpa_group_update_count;
u32 wpa_pairwise_update_count;
int rsn_pairwise;
int rsn_preauth;
int eapol_version;
int peerkey;
int wmm_enabled;
int wmm_uapsd;
int disable_pmksa_caching;
int okc;
int tx_status;
#ifdef CONFIG_IEEE80211W
enum mfp_options ieee80211w;
int group_mgmt_cipher;
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_IEEE80211R_AP
u8 ssid[SSID_MAX_LEN];
size_t ssid_len;
u8 mobility_domain[MOBILITY_DOMAIN_ID_LEN];
u8 r0_key_holder[FT_R0KH_ID_MAX_LEN];
size_t r0_key_holder_len;
u8 r1_key_holder[FT_R1KH_ID_LEN];
u32 r0_key_lifetime;
u32 reassociation_deadline;
struct ft_remote_r0kh *r0kh_list;
struct ft_remote_r1kh *r1kh_list;
int pmk_r1_push;
int ft_over_ds;
int ft_psk_generate_local;
#endif /* CONFIG_IEEE80211R_AP */
int disable_gtk;
int ap_mlme;
#ifdef CONFIG_TESTING_OPTIONS
double corrupt_gtk_rekey_mic_probability;
u8 own_ie_override[MAX_OWN_IE_OVERRIDE];
size_t own_ie_override_len;
#endif /* CONFIG_TESTING_OPTIONS */
#ifdef CONFIG_P2P
u8 ip_addr_go[4];
u8 ip_addr_mask[4];
u8 ip_addr_start[4];
u8 ip_addr_end[4];
#endif /* CONFIG_P2P */
#ifdef CONFIG_FILS
unsigned int fils_cache_id_set:1;
u8 fils_cache_id[FILS_CACHE_ID_LEN];
#endif /* CONFIG_FILS */
};
typedef enum {
LOGGER_DEBUG, LOGGER_INFO, LOGGER_WARNING
} logger_level;
typedef enum {
WPA_EAPOL_portEnabled, WPA_EAPOL_portValid, WPA_EAPOL_authorized,
WPA_EAPOL_portControl_Auto, WPA_EAPOL_keyRun, WPA_EAPOL_keyAvailable,
WPA_EAPOL_keyDone, WPA_EAPOL_inc_EapolFramesTx
} wpa_eapol_variable;
struct wpa_auth_callbacks {
void (*logger)(void *ctx, const u8 *addr, logger_level level,
const char *txt);
void (*disconnect)(void *ctx, const u8 *addr, u16 reason);
int (*mic_failure_report)(void *ctx, const u8 *addr);
void (*psk_failure_report)(void *ctx, const u8 *addr);
void (*set_eapol)(void *ctx, const u8 *addr, wpa_eapol_variable var,
int value);
int (*get_eapol)(void *ctx, const u8 *addr, wpa_eapol_variable var);
const u8 * (*get_psk)(void *ctx, const u8 *addr, const u8 *p2p_dev_addr,
const u8 *prev_psk);
int (*get_msk)(void *ctx, const u8 *addr, u8 *msk, size_t *len);
int (*set_key)(void *ctx, int vlan_id, enum wpa_alg alg,
const u8 *addr, int idx, u8 *key, size_t key_len);
int (*get_seqnum)(void *ctx, const u8 *addr, int idx, u8 *seq);
int (*send_eapol)(void *ctx, const u8 *addr, const u8 *data,
size_t data_len, int encrypt);
int (*for_each_sta)(void *ctx, int (*cb)(struct wpa_state_machine *sm,
void *ctx), void *cb_ctx);
int (*for_each_auth)(void *ctx, int (*cb)(struct wpa_authenticator *a,
void *ctx), void *cb_ctx);
int (*send_ether)(void *ctx, const u8 *dst, u16 proto, const u8 *data,
size_t data_len);
int (*send_oui)(void *ctx, const u8 *dst, u8 oui_suffix, const u8 *data,
size_t data_len);
#ifdef CONFIG_IEEE80211R_AP
struct wpa_state_machine * (*add_sta)(void *ctx, const u8 *sta_addr);
int (*send_ft_action)(void *ctx, const u8 *dst,
const u8 *data, size_t data_len);
int (*add_tspec)(void *ctx, const u8 *sta_addr, u8 *tspec_ie,
size_t tspec_ielen);
#endif /* CONFIG_IEEE80211R_AP */
#ifdef CONFIG_MESH
int (*start_ampe)(void *ctx, const u8 *sta_addr);
#endif /* CONFIG_MESH */
};
struct wpa_authenticator * wpa_init(const u8 *addr,
struct wpa_auth_config *conf,
const struct wpa_auth_callbacks *cb,
void *cb_ctx);
int wpa_init_keys(struct wpa_authenticator *wpa_auth);
void wpa_deinit(struct wpa_authenticator *wpa_auth);
int wpa_reconfig(struct wpa_authenticator *wpa_auth,
struct wpa_auth_config *conf);
enum {
WPA_IE_OK, WPA_INVALID_IE, WPA_INVALID_GROUP, WPA_INVALID_PAIRWISE,
WPA_INVALID_AKMP, WPA_NOT_ENABLED, WPA_ALLOC_FAIL,
WPA_MGMT_FRAME_PROTECTION_VIOLATION, WPA_INVALID_MGMT_GROUP_CIPHER,
WPA_INVALID_MDIE, WPA_INVALID_PROTO
};
int wpa_validate_wpa_ie(struct wpa_authenticator *wpa_auth,
struct wpa_state_machine *sm,
const u8 *wpa_ie, size_t wpa_ie_len,
const u8 *mdie, size_t mdie_len,
const u8 *owe_dh, size_t owe_dh_len);
int wpa_validate_osen(struct wpa_authenticator *wpa_auth,
struct wpa_state_machine *sm,
const u8 *osen_ie, size_t osen_ie_len);
int wpa_auth_uses_mfp(struct wpa_state_machine *sm);
struct wpa_state_machine *
wpa_auth_sta_init(struct wpa_authenticator *wpa_auth, const u8 *addr,
const u8 *p2p_dev_addr);
int wpa_auth_sta_associated(struct wpa_authenticator *wpa_auth,
struct wpa_state_machine *sm);
void wpa_auth_sta_no_wpa(struct wpa_state_machine *sm);
void wpa_auth_sta_deinit(struct wpa_state_machine *sm);
void wpa_receive(struct wpa_authenticator *wpa_auth,
struct wpa_state_machine *sm,
u8 *data, size_t data_len);
enum wpa_event {
WPA_AUTH, WPA_ASSOC, WPA_DISASSOC, WPA_DEAUTH, WPA_REAUTH,
WPA_REAUTH_EAPOL, WPA_ASSOC_FT, WPA_ASSOC_FILS
};
void wpa_remove_ptk(struct wpa_state_machine *sm);
int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event);
void wpa_auth_sm_notify(struct wpa_state_machine *sm);
void wpa_gtk_rekey(struct wpa_authenticator *wpa_auth);
int wpa_get_mib(struct wpa_authenticator *wpa_auth, char *buf, size_t buflen);
int wpa_get_mib_sta(struct wpa_state_machine *sm, char *buf, size_t buflen);
void wpa_auth_countermeasures_start(struct wpa_authenticator *wpa_auth);
int wpa_auth_pairwise_set(struct wpa_state_machine *sm);
int wpa_auth_get_pairwise(struct wpa_state_machine *sm);
int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm);
int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm);
int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
struct rsn_pmksa_cache_entry *entry);
struct rsn_pmksa_cache_entry *
wpa_auth_sta_get_pmksa(struct wpa_state_machine *sm);
void wpa_auth_sta_local_mic_failure_report(struct wpa_state_machine *sm);
const u8 * wpa_auth_get_wpa_ie(struct wpa_authenticator *wpa_auth,
size_t *len);
int wpa_auth_pmksa_add(struct wpa_state_machine *sm, const u8 *pmk,
unsigned int pmk_len,
int session_timeout, struct eapol_state_machine *eapol);
int wpa_auth_pmksa_add_preauth(struct wpa_authenticator *wpa_auth,
const u8 *pmk, size_t len, const u8 *sta_addr,
int session_timeout,
struct eapol_state_machine *eapol);
int wpa_auth_pmksa_add_sae(struct wpa_authenticator *wpa_auth, const u8 *addr,
const u8 *pmk, const u8 *pmkid);
void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
const u8 *sta_addr);
int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
size_t len);
void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth);
int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr,
char *buf, size_t len);
struct rsn_pmksa_cache_entry *
wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk,
const u8 *pmkid, int expiration);
int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth,
struct rsn_pmksa_cache_entry *entry);
struct rsn_pmksa_cache_entry *
wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
const u8 *pmkid);
struct rsn_pmksa_cache_entry *
wpa_auth_pmksa_get_fils_cache_id(struct wpa_authenticator *wpa_auth,
const u8 *sta_addr, const u8 *pmkid);
void wpa_auth_pmksa_set_to_sm(struct rsn_pmksa_cache_entry *pmksa,
struct wpa_state_machine *sm,
struct wpa_authenticator *wpa_auth,
u8 *pmkid, u8 *pmk);
int wpa_auth_sta_set_vlan(struct wpa_state_machine *sm, int vlan_id);
void wpa_auth_eapol_key_tx_status(struct wpa_authenticator *wpa_auth,
struct wpa_state_machine *sm, int ack);
#ifdef CONFIG_IEEE80211R_AP
u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
size_t max_len, int auth_alg,
const u8 *req_ies, size_t req_ies_len);
void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
u16 auth_transaction, const u8 *ies, size_t ies_len,
void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
u16 auth_transaction, u16 resp,
const u8 *ies, size_t ies_len),
void *ctx);
u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
size_t ies_len);
int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len);
int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
const u8 *data, size_t data_len);
void wpa_ft_rrb_oui_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
const u8 *dst_addr, u8 oui_suffix, const u8 *data,
size_t data_len);
void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr);
#endif /* CONFIG_IEEE80211R_AP */
void wpa_wnmsleep_rekey_gtk(struct wpa_state_machine *sm);
void wpa_set_wnmsleep(struct wpa_state_machine *sm, int flag);
int wpa_wnmsleep_gtk_subelem(struct wpa_state_machine *sm, u8 *pos);
int wpa_wnmsleep_igtk_subelem(struct wpa_state_machine *sm, u8 *pos);
int wpa_auth_uses_sae(struct wpa_state_machine *sm);
int wpa_auth_uses_ft_sae(struct wpa_state_machine *sm);
int wpa_auth_get_ip_addr(struct wpa_state_machine *sm, u8 *addr);
struct radius_das_attrs;
int wpa_auth_radius_das_disconnect_pmksa(struct wpa_authenticator *wpa_auth,
struct radius_das_attrs *attr);
void wpa_auth_reconfig_group_keys(struct wpa_authenticator *wpa_auth);
int wpa_auth_ensure_group(struct wpa_authenticator *wpa_auth, int vlan_id);
int wpa_auth_release_group(struct wpa_authenticator *wpa_auth, int vlan_id);
int fils_auth_pmk_to_ptk(struct wpa_state_machine *sm, const u8 *pmk,
size_t pmk_len, const u8 *snonce, const u8 *anonce);
int fils_decrypt_assoc(struct wpa_state_machine *sm, const u8 *fils_session,
const struct ieee80211_mgmt *mgmt, size_t frame_len,
u8 *pos, size_t left);
int fils_encrypt_assoc(struct wpa_state_machine *sm, u8 *buf,
size_t current_len, size_t max_len,
const struct wpabuf *hlp);
int fils_set_tk(struct wpa_state_machine *sm);
u8 * hostapd_eid_assoc_fils_session(struct wpa_state_machine *sm, u8 *eid,
const u8 *fils_session);
const u8 * wpa_fils_validate_fils_session(struct wpa_state_machine *sm,
const u8 *ies, size_t ies_len,
const u8 *fils_session);
int wpa_fils_validate_key_confirm(struct wpa_state_machine *sm, const u8 *ies,
size_t ies_len);
int wpa_auth_write_fte(struct wpa_authenticator *wpa_auth, u8 *buf, size_t len);
void wpa_auth_get_fils_aead_params(struct wpa_state_machine *sm,
u8 *fils_anonce, u8 *fils_snonce,
u8 *fils_kek, size_t *fils_kek_len);
#endif /* WPA_AUTH_H */
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