diff options
Diffstat (limited to 'source/n/wpa_supplicant/2017-1/rebased-v2.6-0001-hostapd-Avoid-key-reinstallation-in-FT-handshake.patch')
| -rw-r--r-- | source/n/wpa_supplicant/2017-1/rebased-v2.6-0001-hostapd-Avoid-key-reinstallation-in-FT-handshake.patch | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/source/n/wpa_supplicant/2017-1/rebased-v2.6-0001-hostapd-Avoid-key-reinstallation-in-FT-handshake.patch b/source/n/wpa_supplicant/2017-1/rebased-v2.6-0001-hostapd-Avoid-key-reinstallation-in-FT-handshake.patch deleted file mode 100644 index 72768486..00000000 --- a/source/n/wpa_supplicant/2017-1/rebased-v2.6-0001-hostapd-Avoid-key-reinstallation-in-FT-handshake.patch +++ /dev/null @@ -1,174 +0,0 @@ -From cf4cab804c7afd5c45505528a8d16e46163243a2 Mon Sep 17 00:00:00 2001 -From: Mathy Vanhoef <Mathy.Vanhoef@cs.kuleuven.be> -Date: Fri, 14 Jul 2017 15:15:35 +0200 -Subject: [PATCH 1/8] hostapd: Avoid key reinstallation in FT handshake - -Do not reinstall TK to the driver during Reassociation Response frame -processing if the first attempt of setting the TK succeeded. This avoids -issues related to clearing the TX/RX PN that could result in reusing -same PN values for transmitted frames (e.g., due to CCM nonce reuse and -also hitting replay protection on the receiver) and accepting replayed -frames on RX side. - -This issue was introduced by the commit -0e84c25434e6a1f283c7b4e62e483729085b78d2 ('FT: Fix PTK configuration in -authenticator') which allowed wpa_ft_install_ptk() to be called multiple -times with the same PTK. While the second configuration attempt is -needed with some drivers, it must be done only if the first attempt -failed. - -Signed-off-by: Mathy Vanhoef <Mathy.Vanhoef@cs.kuleuven.be> ---- - src/ap/ieee802_11.c | 16 +++++++++++++--- - src/ap/wpa_auth.c | 11 +++++++++++ - src/ap/wpa_auth.h | 3 ++- - src/ap/wpa_auth_ft.c | 10 ++++++++++ - src/ap/wpa_auth_i.h | 1 + - 5 files changed, 37 insertions(+), 4 deletions(-) - -diff --git a/src/ap/ieee802_11.c b/src/ap/ieee802_11.c -index 4e04169..333035f 100644 ---- a/src/ap/ieee802_11.c -+++ b/src/ap/ieee802_11.c -@@ -1841,6 +1841,7 @@ static int add_associated_sta(struct hostapd_data *hapd, - { - struct ieee80211_ht_capabilities ht_cap; - struct ieee80211_vht_capabilities vht_cap; -+ int set = 1; - - /* - * Remove the STA entry to ensure the STA PS state gets cleared and -@@ -1848,9 +1849,18 @@ static int add_associated_sta(struct hostapd_data *hapd, - * FT-over-the-DS, where a station re-associates back to the same AP but - * skips the authentication flow, or if working with a driver that - * does not support full AP client state. -+ * -+ * Skip this if the STA has already completed FT reassociation and the -+ * TK has been configured since the TX/RX PN must not be reset to 0 for -+ * the same key. - */ -- if (!sta->added_unassoc) -+ if (!sta->added_unassoc && -+ (!(sta->flags & WLAN_STA_AUTHORIZED) || -+ !wpa_auth_sta_ft_tk_already_set(sta->wpa_sm))) { - hostapd_drv_sta_remove(hapd, sta->addr); -+ wpa_auth_sm_event(sta->wpa_sm, WPA_DRV_STA_REMOVED); -+ set = 0; -+ } - - #ifdef CONFIG_IEEE80211N - if (sta->flags & WLAN_STA_HT) -@@ -1873,11 +1883,11 @@ static int add_associated_sta(struct hostapd_data *hapd, - sta->flags & WLAN_STA_VHT ? &vht_cap : NULL, - sta->flags | WLAN_STA_ASSOC, sta->qosinfo, - sta->vht_opmode, sta->p2p_ie ? 1 : 0, -- sta->added_unassoc)) { -+ set)) { - hostapd_logger(hapd, sta->addr, - HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_NOTICE, - "Could not %s STA to kernel driver", -- sta->added_unassoc ? "set" : "add"); -+ set ? "set" : "add"); - - if (sta->added_unassoc) { - hostapd_drv_sta_remove(hapd, sta->addr); -diff --git a/src/ap/wpa_auth.c b/src/ap/wpa_auth.c -index 3587086..707971d 100644 ---- a/src/ap/wpa_auth.c -+++ b/src/ap/wpa_auth.c -@@ -1745,6 +1745,9 @@ int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event) - #else /* CONFIG_IEEE80211R */ - break; - #endif /* CONFIG_IEEE80211R */ -+ case WPA_DRV_STA_REMOVED: -+ sm->tk_already_set = FALSE; -+ return 0; - } - - #ifdef CONFIG_IEEE80211R -@@ -3250,6 +3253,14 @@ int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm) - } - - -+int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm) -+{ -+ if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt)) -+ return 0; -+ return sm->tk_already_set; -+} -+ -+ - int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm, - struct rsn_pmksa_cache_entry *entry) - { -diff --git a/src/ap/wpa_auth.h b/src/ap/wpa_auth.h -index 0de8d97..97461b0 100644 ---- a/src/ap/wpa_auth.h -+++ b/src/ap/wpa_auth.h -@@ -267,7 +267,7 @@ void wpa_receive(struct wpa_authenticator *wpa_auth, - 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_REAUTH_EAPOL, WPA_ASSOC_FT, WPA_DRV_STA_REMOVED - }; - void wpa_remove_ptk(struct wpa_state_machine *sm); - int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event); -@@ -280,6 +280,7 @@ 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_ft_tk_already_set(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 * -diff --git a/src/ap/wpa_auth_ft.c b/src/ap/wpa_auth_ft.c -index 42242a5..e63b99a 100644 ---- a/src/ap/wpa_auth_ft.c -+++ b/src/ap/wpa_auth_ft.c -@@ -780,6 +780,14 @@ void wpa_ft_install_ptk(struct wpa_state_machine *sm) - return; - } - -+ if (sm->tk_already_set) { -+ /* Must avoid TK reconfiguration to prevent clearing of TX/RX -+ * PN in the driver */ -+ wpa_printf(MSG_DEBUG, -+ "FT: Do not re-install same PTK to the driver"); -+ return; -+ } -+ - /* FIX: add STA entry to kernel/driver here? The set_key will fail - * most likely without this.. At the moment, STA entry is added only - * after association has been completed. This function will be called -@@ -792,6 +800,7 @@ void wpa_ft_install_ptk(struct wpa_state_machine *sm) - - /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */ - sm->pairwise_set = TRUE; -+ sm->tk_already_set = TRUE; - } - - -@@ -898,6 +907,7 @@ static int wpa_ft_process_auth_req(struct wpa_state_machine *sm, - - sm->pairwise = pairwise; - sm->PTK_valid = TRUE; -+ sm->tk_already_set = FALSE; - wpa_ft_install_ptk(sm); - - buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) + -diff --git a/src/ap/wpa_auth_i.h b/src/ap/wpa_auth_i.h -index 72b7eb3..7fd8f05 100644 ---- a/src/ap/wpa_auth_i.h -+++ b/src/ap/wpa_auth_i.h -@@ -65,6 +65,7 @@ struct wpa_state_machine { - struct wpa_ptk PTK; - Boolean PTK_valid; - Boolean pairwise_set; -+ Boolean tk_already_set; - int keycount; - Boolean Pair; - struct wpa_key_replay_counter { --- -2.7.4 - |