2 * IEEE 802.1X-2010 KaY Interface
3 * Copyright (c) 2013-2014, Qualcomm Atheros, Inc.
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
8 #include <openssl/ssl.h>
9 #include "utils/includes.h"
11 #include "utils/common.h"
12 #include "eap_peer/eap.h"
13 #include "eap_peer/eap_i.h"
14 #include "eapol_supp/eapol_supp_sm.h"
15 #include "pae/ieee802_1x_key.h"
16 #include "pae/ieee802_1x_kay.h"
17 #include "wpa_supplicant_i.h"
19 #include "config_ssid.h"
24 #define DEFAULT_KEY_LEN 16
25 /* secure Connectivity Association Key Name (CKN) */
26 #define DEFAULT_CKN_LEN 16
29 static int wpas_macsec_init(void *priv
, struct macsec_init_params
*params
)
31 return wpa_drv_macsec_init(priv
, params
);
35 static int wpas_macsec_deinit(void *priv
)
37 return wpa_drv_macsec_deinit(priv
);
41 static int wpas_enable_protect_frames(void *wpa_s
, Boolean enabled
)
43 return wpa_drv_enable_protect_frames(wpa_s
, enabled
);
47 static int wpas_set_replay_protect(void *wpa_s
, Boolean enabled
, u32 window
)
49 return wpa_drv_set_replay_protect(wpa_s
, enabled
, window
);
53 static int wpas_set_current_cipher_suite(void *wpa_s
, const u8
*cs
,
56 return wpa_drv_set_current_cipher_suite(wpa_s
, cs
, cs_len
);
60 static int wpas_enable_controlled_port(void *wpa_s
, Boolean enabled
)
62 return wpa_drv_enable_controlled_port(wpa_s
, enabled
);
66 static int wpas_get_receive_lowest_pn(void *wpa_s
, u32 channel
,
67 u8 an
, u32
*lowest_pn
)
69 return wpa_drv_get_receive_lowest_pn(wpa_s
, channel
, an
, lowest_pn
);
73 static int wpas_get_transmit_next_pn(void *wpa_s
, u32 channel
,
76 return wpa_drv_get_transmit_next_pn(wpa_s
, channel
, an
, next_pn
);
80 static int wpas_set_transmit_next_pn(void *wpa_s
, u32 channel
,
83 return wpa_drv_set_transmit_next_pn(wpa_s
, channel
, an
, next_pn
);
87 static int wpas_get_available_receive_sc(void *wpa_s
, u32
*channel
)
89 return wpa_drv_get_available_receive_sc(wpa_s
, channel
);
93 static unsigned int conf_offset_val(enum confidentiality_offset co
)
96 case CONFIDENTIALITY_OFFSET_30
:
99 case CONFIDENTIALITY_OFFSET_50
:
107 static int wpas_create_receive_sc(void *wpa_s
, u32 channel
,
108 struct ieee802_1x_mka_sci
*sci
,
109 enum validate_frames vf
,
110 enum confidentiality_offset co
)
112 return wpa_drv_create_receive_sc(wpa_s
, channel
, sci
->addr
, sci
->port
,
113 conf_offset_val(co
), vf
);
117 static int wpas_delete_receive_sc(void *wpa_s
, u32 channel
)
119 return wpa_drv_delete_receive_sc(wpa_s
, channel
);
123 static int wpas_create_receive_sa(void *wpa_s
, u32 channel
, u8 an
,
124 u32 lowest_pn
, const u8
*sak
)
126 return wpa_drv_create_receive_sa(wpa_s
, channel
, an
, lowest_pn
, sak
);
130 static int wpas_enable_receive_sa(void *wpa_s
, u32 channel
, u8 an
)
132 return wpa_drv_enable_receive_sa(wpa_s
, channel
, an
);
136 static int wpas_disable_receive_sa(void *wpa_s
, u32 channel
, u8 an
)
138 return wpa_drv_disable_receive_sa(wpa_s
, channel
, an
);
142 static int wpas_get_available_transmit_sc(void *wpa_s
, u32
*channel
)
144 return wpa_drv_get_available_transmit_sc(wpa_s
, channel
);
149 wpas_create_transmit_sc(void *wpa_s
, u32 channel
,
150 const struct ieee802_1x_mka_sci
*sci
,
151 enum confidentiality_offset co
)
153 return wpa_drv_create_transmit_sc(wpa_s
, channel
, sci
->addr
, sci
->port
,
154 conf_offset_val(co
));
158 static int wpas_delete_transmit_sc(void *wpa_s
, u32 channel
)
160 return wpa_drv_delete_transmit_sc(wpa_s
, channel
);
164 static int wpas_create_transmit_sa(void *wpa_s
, u32 channel
, u8 an
,
165 u32 next_pn
, Boolean confidentiality
,
168 return wpa_drv_create_transmit_sa(wpa_s
, channel
, an
, next_pn
,
169 confidentiality
, sak
);
173 static int wpas_enable_transmit_sa(void *wpa_s
, u32 channel
, u8 an
)
175 return wpa_drv_enable_transmit_sa(wpa_s
, channel
, an
);
179 static int wpas_disable_transmit_sa(void *wpa_s
, u32 channel
, u8 an
)
181 return wpa_drv_disable_transmit_sa(wpa_s
, channel
, an
);
185 int ieee802_1x_alloc_kay_sm(struct wpa_supplicant
*wpa_s
, struct wpa_ssid
*ssid
)
187 struct ieee802_1x_kay_ctx
*kay_ctx
;
188 struct ieee802_1x_kay
*res
= NULL
;
189 enum macsec_policy policy
;
191 ieee802_1x_dealloc_kay_sm(wpa_s
);
193 if (!ssid
|| ssid
->macsec_policy
== 0)
196 policy
= ssid
->macsec_policy
== 1 ? SHOULD_SECURE
: DO_NOT_SECURE
;
198 kay_ctx
= os_zalloc(sizeof(*kay_ctx
));
202 kay_ctx
->ctx
= wpa_s
;
204 kay_ctx
->macsec_init
= wpas_macsec_init
;
205 kay_ctx
->macsec_deinit
= wpas_macsec_deinit
;
206 kay_ctx
->enable_protect_frames
= wpas_enable_protect_frames
;
207 kay_ctx
->set_replay_protect
= wpas_set_replay_protect
;
208 kay_ctx
->set_current_cipher_suite
= wpas_set_current_cipher_suite
;
209 kay_ctx
->enable_controlled_port
= wpas_enable_controlled_port
;
210 kay_ctx
->get_receive_lowest_pn
= wpas_get_receive_lowest_pn
;
211 kay_ctx
->get_transmit_next_pn
= wpas_get_transmit_next_pn
;
212 kay_ctx
->set_transmit_next_pn
= wpas_set_transmit_next_pn
;
213 kay_ctx
->get_available_receive_sc
= wpas_get_available_receive_sc
;
214 kay_ctx
->create_receive_sc
= wpas_create_receive_sc
;
215 kay_ctx
->delete_receive_sc
= wpas_delete_receive_sc
;
216 kay_ctx
->create_receive_sa
= wpas_create_receive_sa
;
217 kay_ctx
->enable_receive_sa
= wpas_enable_receive_sa
;
218 kay_ctx
->disable_receive_sa
= wpas_disable_receive_sa
;
219 kay_ctx
->get_available_transmit_sc
= wpas_get_available_transmit_sc
;
220 kay_ctx
->create_transmit_sc
= wpas_create_transmit_sc
;
221 kay_ctx
->delete_transmit_sc
= wpas_delete_transmit_sc
;
222 kay_ctx
->create_transmit_sa
= wpas_create_transmit_sa
;
223 kay_ctx
->enable_transmit_sa
= wpas_enable_transmit_sa
;
224 kay_ctx
->disable_transmit_sa
= wpas_disable_transmit_sa
;
226 res
= ieee802_1x_kay_init(kay_ctx
, policy
, wpa_s
->ifname
,
239 void ieee802_1x_dealloc_kay_sm(struct wpa_supplicant
*wpa_s
)
244 ieee802_1x_kay_deinit(wpa_s
->kay
);
249 static int ieee802_1x_auth_get_session_id(struct wpa_supplicant
*wpa_s
,
250 const u8
*addr
, u8
*sid
, size_t *len
)
252 const u8
*session_id
;
253 size_t id_len
, need_len
;
255 session_id
= eapol_sm_get_session_id(wpa_s
->eapol
, &id_len
);
256 if (session_id
== NULL
) {
257 wpa_printf(MSG_DEBUG
,
258 "Failed to get SessionID from EAPOL state machines");
262 need_len
= 1 + 2 * SSL3_RANDOM_SIZE
;
263 if (need_len
> id_len
) {
264 wpa_printf(MSG_DEBUG
, "EAP Session-Id not long enough");
268 os_memcpy(sid
, session_id
, need_len
);
275 static int ieee802_1x_auth_get_msk(struct wpa_supplicant
*wpa_s
, const u8
*addr
,
276 u8
*msk
, size_t *len
)
287 keylen
= EAP_MSK_LEN
;
288 res
= eapol_sm_get_key(sm
, key
, keylen
);
290 wpa_printf(MSG_DEBUG
,
291 "Failed to get MSK from EAPOL state machines");
297 os_memcpy(msk
, key
, keylen
);
304 void * ieee802_1x_notify_create_actor(struct wpa_supplicant
*wpa_s
,
308 size_t sid_len
= 128;
309 struct mka_key_name
*ckn
;
314 if (!wpa_s
->kay
|| wpa_s
->kay
->policy
== DO_NOT_SECURE
)
317 wpa_printf(MSG_DEBUG
,
318 "IEEE 802.1X: External notification - Create MKA for "
319 MACSTR
, MAC2STR(peer_addr
));
321 msk
= os_zalloc(sizeof(*msk
));
322 sid
= os_zalloc(sid_len
);
323 ckn
= os_zalloc(sizeof(*ckn
));
324 cak
= os_zalloc(sizeof(*cak
));
325 if (!msk
|| !sid
|| !ckn
|| !cak
)
328 msk
->len
= DEFAULT_KEY_LEN
;
329 if (ieee802_1x_auth_get_msk(wpa_s
, wpa_s
->bssid
, msk
->key
, &msk
->len
)) {
330 wpa_printf(MSG_ERROR
, "IEEE 802.1X: Could not get MSK");
334 if (ieee802_1x_auth_get_session_id(wpa_s
, wpa_s
->bssid
, sid
, &sid_len
))
336 wpa_printf(MSG_ERROR
,
337 "IEEE 802.1X: Could not get EAP Session Id");
341 /* Derive CAK from MSK */
342 cak
->len
= DEFAULT_KEY_LEN
;
343 if (ieee802_1x_cak_128bits_aes_cmac(msk
->key
, wpa_s
->own_addr
,
344 peer_addr
, cak
->key
)) {
345 wpa_printf(MSG_ERROR
,
346 "IEEE 802.1X: Deriving CAK failed");
349 wpa_hexdump_key(MSG_DEBUG
, "Derived CAK", cak
->key
, cak
->len
);
351 /* Derive CKN from MSK */
352 ckn
->len
= DEFAULT_CKN_LEN
;
353 if (ieee802_1x_ckn_128bits_aes_cmac(msk
->key
, wpa_s
->own_addr
,
354 peer_addr
, sid
, sid_len
,
356 wpa_printf(MSG_ERROR
,
357 "IEEE 802.1X: Deriving CKN failed");
360 wpa_hexdump(MSG_DEBUG
, "Derived CKN", ckn
->name
, ckn
->len
);
362 res
= ieee802_1x_kay_create_mka(wpa_s
->kay
, ckn
, cak
, 0,
363 EAP_EXCHANGE
, FALSE
);
367 os_memset(msk
, 0, sizeof(*msk
));
373 os_memset(cak
, 0, sizeof(*cak
));