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FT: Copy MDIE and FTIE from (Re)Association Response into EAPOL-Key 2/4

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IEEE Std 802.11r-2008 requires that the message 2 includes FTIE and
MDIE from the AP's (Re)Association Response frame in the Key Data
field.
This commit is contained in:
Jouni Malinen 2010-04-10 16:48:40 +03:00
parent d3ccead325
commit 55046414b1
3 changed files with 36 additions and 3 deletions
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19
src/rsn_supp/wpa.c
View file

@ -273,8 +273,12 @@ int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst,
if (wpa_key_mgmt_ft(sm->key_mgmt)) {
int res;
/* Add PMKR1Name into RSN IE (PMKID-List) */
rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN);
/*
* Add PMKR1Name into RSN IE (PMKID-List) and add MDIE and
* FTIE from (Re)Association Response.
*/
rsn_ie_buf = os_malloc(wpa_ie_len + 2 + 2 + PMKID_LEN +
sm->assoc_resp_ies_len);
if (rsn_ie_buf == NULL)
return -1;
os_memcpy(rsn_ie_buf, wpa_ie, wpa_ie_len);
@ -284,9 +288,15 @@ int wpa_supplicant_send_2_of_4(struct wpa_sm *sm, const unsigned char *dst,
os_free(rsn_ie_buf);
return -1;
}
wpa_ie_len += res;
if (sm->assoc_resp_ies) {
os_memcpy(rsn_ie_buf + wpa_ie_len, sm->assoc_resp_ies,
sm->assoc_resp_ies_len);
wpa_ie_len += sm->assoc_resp_ies_len;
}
wpa_ie = rsn_ie_buf;
wpa_ie_len += res;
}
#endif /* CONFIG_IEEE80211R */
@ -1899,6 +1909,9 @@ void wpa_sm_deinit(struct wpa_sm *sm)
os_free(sm->ap_rsn_ie);
os_free(sm->ctx);
peerkey_deinit(sm);
#ifdef CONFIG_IEEE80211R
os_free(sm->assoc_resp_ies);
#endif /* CONFIG_IEEE80211R */
os_free(sm);
}

18
src/rsn_supp/wpa_ft.c
View file

@ -136,6 +136,24 @@ int wpa_sm_set_ft_params(struct wpa_sm *sm, const u8 *ies, size_t ies_len)
} else
os_memset(sm->r1kh_id, 0, FT_R1KH_ID_LEN);
os_free(sm->assoc_resp_ies);
sm->assoc_resp_ies = os_malloc(ft.mdie_len + 2 + ft.ftie_len + 2);
if (sm->assoc_resp_ies) {
u8 *pos = sm->assoc_resp_ies;
if (ft.mdie) {
os_memcpy(pos, ft.mdie - 2, ft.mdie_len + 2);
pos += ft.mdie_len + 2;
}
if (ft.ftie) {
os_memcpy(pos, ft.ftie - 2, ft.ftie_len + 2);
pos += ft.ftie_len + 2;
}
sm->assoc_resp_ies_len = pos - sm->assoc_resp_ies;
wpa_hexdump(MSG_DEBUG, "FT: Stored MDIE and FTIE from "
"(Re)Association Response",
sm->assoc_resp_ies, sm->assoc_resp_ies_len);
}
return 0;
}

2
src/rsn_supp/wpa_i.h
View file

@ -109,6 +109,8 @@ struct wpa_sm {
u8 target_ap[ETH_ALEN]; /* over-the-DS target AP */
int set_ptk_after_assoc;
u8 mdie_ft_capab; /* FT Capability and Policy from target AP MDIE */
u8 *assoc_resp_ies; /* MDIE and FTIE from (Re)Association Response */
size_t assoc_resp_ies_len;
#endif /* CONFIG_IEEE80211R */
};