wpa_supplicant: Add SAE handshake support for WPA3-PSK

Under WPA3-Personal, SAE authentication is used to derive PMK
which is more secure and immune to offline dictionary attacks.
1. Add modules to generate SAE commit/confirm for the handshake
2. Add modules that build and parse SAE data in Auth frames
3. Add WPA3 association and key mgmt definitions
4. Invert y-bit while solving for ECC co-ordinate -
     Once an X co-ordinate is obtained, solving for Y co-ordinate
     using an elliptical curve equation results in 2 possible values,
     Y and (P - Y), where p is the prime number. The co-ordinates are
     used for deriving keys in SAE handshake. As par the 802.11 spec
     if LSB of X is same as LSB of Y then Y is chosen, (P - Y) otherwise.
     This is not what is implemented, so fix this behavior to obtain the
     correct Y co-ordinate.

components/wpa_supplicant/src/rsn_supp/wpa.c

@@ -2077,6 +2077,10 @@ void wpa_set_profile(u32 wpa_proto, u8 auth_mode)
         sm->key_mgmt = WPA_KEY_MGMT_PSK;  /* fixed to PSK for now */
     } else if (auth_mode == WPA2_AUTH_PSK_SHA256) {
         sm->key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
+    } else if (auth_mode == WPA3_AUTH_PSK) {
+         sm->key_mgmt = WPA_KEY_MGMT_SAE; /* for WPA3 PSK */
+    } else {
+        sm->key_mgmt = WPA_KEY_MGMT_PSK;  /* fixed to PSK for now */
     }
 }
 
@@ -2142,6 +2146,8 @@ wpa_set_passphrase(char * passphrase, u8 *ssid, size_t ssid_len)
      *  Here only handle passphrase string.  Need extra step to handle 32B, 64Hex raw
      *    PMK.
      */
+    if (sm->key_mgmt == WPA_KEY_MGMT_SAE)
+	return;
 
     /* This is really SLOW, so just re cacl while reset param */
     if (esp_wifi_sta_get_reset_param_internal() != 0) {