eapol: do not parse RSN for WPA1 in 1 of 4

A recent change checked the return value of ie_parse_rsne_from_data inside the ptk 1/4 handler. This seemed safe, but actually caused the eapol unit test to fail.

The reason was because eapol was parsing the IEs assuming they were an RSN, when they could be a WPA IE (WPA1 not WPA2). The WPA case does not end up using the rsn_info at all, so having rsn_info uninitialized did not pose a problem. After adding the return value check it was found this fails every time for WPA1.

Since the rsn_info is not needed for WPA1 we can only do the RSN parse for WPA2 and leave rsn_info uninitialized.

---
 src/eapol.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

index 6f04dbc5..349e824f 100644
@@ -1106,8 +1106,11 @@ static void eapol_handle_ptk_1_of_4(struct eapol_sm *sm,
 	pmkid = handshake_util_find_pmkid_kde(EAPOL_KEY_DATA(ek, sm->mic_len),
 					EAPOL_KEY_DATA_LEN(ek, sm->mic_len));
 
-	if (ie_parse_rsne_from_data(own_ie, own_ie[1] + 2, &rsn_info) < 0)
-		goto error_unspecified;
+	if (!sm->handshake->wpa_ie) {
+		if (ie_parse_rsne_from_data(own_ie, own_ie[1] + 2,
+						&rsn_info) < 0)
+			goto error_unspecified;
+	}
 
 	/*
 	 * Require the PMKID KDE whenever we've sent a list of PMKIDs in

2.17.1

Hi James,

applied, thanks.

Regards,
-Denis