mesh: Do not use RX MGTK as RX IGTK

The previous implementation was incorrect in forcing the MGTK to be used
as the IGTK as well. Define new variable for storing IGTK and use that,
if set, to configure IGTK to the driver. This commit does not yet fix
AMPE element parsing to fill in this information.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/ap/sta_info.h

@@ -89,6 +89,8 @@ struct sta_info {
 	size_t mtk_len;
 	u8 mgtk[WPA_TK_MAX_LEN];
 	size_t mgtk_len;
+	u8 igtk[WPA_TK_MAX_LEN];
+	size_t igtk_len;
 	u8 sae_auth_retry;
 #endif /* CONFIG_MESH */
 

wpa_supplicant/mesh_mpm.c

@@ -805,9 +805,15 @@ static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s,
 		wpa_drv_set_key(wpa_s, WPA_ALG_CCMP, sta->addr, 1, 0,
 				seq, sizeof(seq),
 				sta->mgtk, sta->mgtk_len);
-		wpa_drv_set_key(wpa_s, WPA_ALG_IGTK, sta->addr, 4, 0,
-				seq, sizeof(seq),
-				sta->mgtk, sizeof(sta->mgtk));
+
+		if (sta->igtk_len) {
+			wpa_hexdump_key(MSG_DEBUG, "RX IGTK",
+					sta->igtk, sta->igtk_len);
+			/* FIX: key index.. */
+			wpa_drv_set_key(wpa_s, WPA_ALG_IGTK, sta->addr, 4, 0,
+					seq, sizeof(seq),
+					sta->igtk, sta->igtk_len);
+		}
 	}
 
 	wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB);