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authorCy Schubert <cy@FreeBSD.org>2018-07-19 14:37:32 +0000
committerCy Schubert <cy@FreeBSD.org>2018-07-19 14:37:32 +0000
commit259b356d9792e7304ef04897eb9cc3b8df8c2771 (patch)
tree12f95473f60274222e25a1e621959a1a42f30234
parent190650c71454d2076d5103d0245f4c40b1fed5ff (diff)
downloadsrc-259b356d9792e7304ef04897eb9cc3b8df8c2771.tar.gz
src-259b356d9792e7304ef04897eb9cc3b8df8c2771.zip
Import upline security patch to prevent an alreadi in use group ke.
Obtained from: https://w1.fi/security/2017-1/\ rebased-v2.6-0002-Prevent-reinstallation-\ of-an-already-in-use-group-ke.patch
Notes
Notes: svn path=/vendor/wpa/dist/; revision=336486
-rw-r--r--src/common/wpa_common.h11
-rw-r--r--src/rsn_supp/wpa.c116
-rw-r--r--src/rsn_supp/wpa_i.h4
3 files changed, 87 insertions, 44 deletions
diff --git a/src/common/wpa_common.h b/src/common/wpa_common.h
index af1d0f0c6efb..d2002857ae86 100644
--- a/src/common/wpa_common.h
+++ b/src/common/wpa_common.h
@@ -217,6 +217,17 @@ struct wpa_ptk {
size_t tk_len;
};
+struct wpa_gtk {
+ u8 gtk[WPA_GTK_MAX_LEN];
+ size_t gtk_len;
+};
+
+#ifdef CONFIG_IEEE80211W
+struct wpa_igtk {
+ u8 igtk[WPA_IGTK_MAX_LEN];
+ size_t igtk_len;
+};
+#endif /* CONFIG_IEEE80211W */
/* WPA IE version 1
* 00-50-f2:1 (OUI:OUI type)
diff --git a/src/rsn_supp/wpa.c b/src/rsn_supp/wpa.c
index 3c4787925e20..95bd7be1e1ed 100644
--- a/src/rsn_supp/wpa.c
+++ b/src/rsn_supp/wpa.c
@@ -714,6 +714,15 @@ static int wpa_supplicant_install_gtk(struct wpa_sm *sm,
const u8 *_gtk = gd->gtk;
u8 gtk_buf[32];
+ /* Detect possible key reinstallation */
+ if (sm->gtk.gtk_len == (size_t) gd->gtk_len &&
+ os_memcmp(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len) == 0) {
+ wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
+ "WPA: Not reinstalling already in-use GTK to the driver (keyidx=%d tx=%d len=%d)",
+ gd->keyidx, gd->tx, gd->gtk_len);
+ return 0;
+ }
+
wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len);
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
"WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)",
@@ -748,6 +757,9 @@ static int wpa_supplicant_install_gtk(struct wpa_sm *sm,
}
os_memset(gtk_buf, 0, sizeof(gtk_buf));
+ sm->gtk.gtk_len = gd->gtk_len;
+ os_memcpy(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len);
+
return 0;
}
@@ -854,6 +866,48 @@ static int wpa_supplicant_pairwise_gtk(struct wpa_sm *sm,
}
+#ifdef CONFIG_IEEE80211W
+static int wpa_supplicant_install_igtk(struct wpa_sm *sm,
+ const struct wpa_igtk_kde *igtk)
+{
+ size_t len = wpa_cipher_key_len(sm->mgmt_group_cipher);
+ u16 keyidx = WPA_GET_LE16(igtk->keyid);
+
+ /* Detect possible key reinstallation */
+ if (sm->igtk.igtk_len == len &&
+ os_memcmp(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len) == 0) {
+ wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
+ "WPA: Not reinstalling already in-use IGTK to the driver (keyidx=%d)",
+ keyidx);
+ return 0;
+ }
+
+ wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
+ "WPA: IGTK keyid %d pn %02x%02x%02x%02x%02x%02x",
+ keyidx, MAC2STR(igtk->pn));
+ wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", igtk->igtk, len);
+ if (keyidx > 4095) {
+ wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
+ "WPA: Invalid IGTK KeyID %d", keyidx);
+ return -1;
+ }
+ if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher),
+ broadcast_ether_addr,
+ keyidx, 0, igtk->pn, sizeof(igtk->pn),
+ igtk->igtk, len) < 0) {
+ wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
+ "WPA: Failed to configure IGTK to the driver");
+ return -1;
+ }
+
+ sm->igtk.igtk_len = len;
+ os_memcpy(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len);
+
+ return 0;
+}
+#endif /* CONFIG_IEEE80211W */
+
+
static int ieee80211w_set_keys(struct wpa_sm *sm,
struct wpa_eapol_ie_parse *ie)
{
@@ -864,30 +918,14 @@ static int ieee80211w_set_keys(struct wpa_sm *sm,
if (ie->igtk) {
size_t len;
const struct wpa_igtk_kde *igtk;
- u16 keyidx;
+
len = wpa_cipher_key_len(sm->mgmt_group_cipher);
if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len)
return -1;
+
igtk = (const struct wpa_igtk_kde *) ie->igtk;
- keyidx = WPA_GET_LE16(igtk->keyid);
- wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d "
- "pn %02x%02x%02x%02x%02x%02x",
- keyidx, MAC2STR(igtk->pn));
- wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK",
- igtk->igtk, len);
- if (keyidx > 4095) {
- wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
- "WPA: Invalid IGTK KeyID %d", keyidx);
- return -1;
- }
- if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher),
- broadcast_ether_addr,
- keyidx, 0, igtk->pn, sizeof(igtk->pn),
- igtk->igtk, len) < 0) {
- wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
- "WPA: Failed to configure IGTK to the driver");
+ if (wpa_supplicant_install_igtk(sm, igtk) < 0)
return -1;
- }
}
return 0;
@@ -2307,7 +2345,7 @@ void wpa_sm_deinit(struct wpa_sm *sm)
*/
void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
{
- int clear_ptk = 1;
+ int clear_keys = 1;
if (sm == NULL)
return;
@@ -2333,11 +2371,11 @@ void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
/* Prepare for the next transition */
wpa_ft_prepare_auth_request(sm, NULL);
- clear_ptk = 0;
+ clear_keys = 0;
}
#endif /* CONFIG_IEEE80211R */
- if (clear_ptk) {
+ if (clear_keys) {
/*
* IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if
* this is not part of a Fast BSS Transition.
@@ -2347,6 +2385,10 @@ void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid)
os_memset(&sm->ptk, 0, sizeof(sm->ptk));
sm->tptk_set = 0;
os_memset(&sm->tptk, 0, sizeof(sm->tptk));
+ os_memset(&sm->gtk, 0, sizeof(sm->gtk));
+#ifdef CONFIG_IEEE80211W
+ os_memset(&sm->igtk, 0, sizeof(sm->igtk));
+#endif /* CONFIG_IEEE80211W */
}
#ifdef CONFIG_TDLS
@@ -2877,6 +2919,10 @@ void wpa_sm_drop_sa(struct wpa_sm *sm)
os_memset(sm->pmk, 0, sizeof(sm->pmk));
os_memset(&sm->ptk, 0, sizeof(sm->ptk));
os_memset(&sm->tptk, 0, sizeof(sm->tptk));
+ os_memset(&sm->gtk, 0, sizeof(sm->gtk));
+#ifdef CONFIG_IEEE80211W
+ os_memset(&sm->igtk, 0, sizeof(sm->igtk));
+#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_IEEE80211R
os_memset(sm->xxkey, 0, sizeof(sm->xxkey));
os_memset(sm->pmk_r0, 0, sizeof(sm->pmk_r0));
@@ -2949,29 +2995,11 @@ int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf)
os_memset(&gd, 0, sizeof(gd));
#ifdef CONFIG_IEEE80211W
} else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) {
- struct wpa_igtk_kde igd;
- u16 keyidx;
-
- os_memset(&igd, 0, sizeof(igd));
- keylen = wpa_cipher_key_len(sm->mgmt_group_cipher);
- os_memcpy(igd.keyid, buf + 2, 2);
- os_memcpy(igd.pn, buf + 4, 6);
-
- keyidx = WPA_GET_LE16(igd.keyid);
- os_memcpy(igd.igtk, buf + 10, keylen);
-
- wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)",
- igd.igtk, keylen);
- if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher),
- broadcast_ether_addr,
- keyidx, 0, igd.pn, sizeof(igd.pn),
- igd.igtk, keylen) < 0) {
- wpa_printf(MSG_DEBUG, "Failed to install the IGTK in "
- "WNM mode");
- os_memset(&igd, 0, sizeof(igd));
+ const struct wpa_igtk_kde *igtk;
+
+ igtk = (const struct wpa_igtk_kde *) (buf + 2);
+ if (wpa_supplicant_install_igtk(sm, igtk) < 0)
return -1;
- }
- os_memset(&igd, 0, sizeof(igd));
#endif /* CONFIG_IEEE80211W */
} else {
wpa_printf(MSG_DEBUG, "Unknown element id");
diff --git a/src/rsn_supp/wpa_i.h b/src/rsn_supp/wpa_i.h
index f653ba6e041d..afc9e371fa72 100644
--- a/src/rsn_supp/wpa_i.h
+++ b/src/rsn_supp/wpa_i.h
@@ -31,6 +31,10 @@ struct wpa_sm {
u8 rx_replay_counter[WPA_REPLAY_COUNTER_LEN];
int rx_replay_counter_set;
u8 request_counter[WPA_REPLAY_COUNTER_LEN];
+ struct wpa_gtk gtk;
+#ifdef CONFIG_IEEE80211W
+ struct wpa_igtk igtk;
+#endif /* CONFIG_IEEE80211W */
struct eapol_sm *eapol; /* EAPOL state machine from upper level code */