wlantest: Remove unnecessary duplication of tk_len from STA entries

The length of the TK is available within struct wpa_ptk, so there is no
need to try to maintain it separately in wlantest.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

wlantest/rx_data.c

@@ -426,7 +426,7 @@ skip_replay_det:
 			decrypted = ccmp_256_decrypt(tk, hdr, data, len, &dlen);
 		else if (sta->pairwise_cipher == WPA_CIPHER_GCMP ||
 			 sta->pairwise_cipher == WPA_CIPHER_GCMP_256)
-			decrypted = gcmp_decrypt(tk, sta->tk_len, hdr, data,
+			decrypted = gcmp_decrypt(tk, sta->ptk.tk_len, hdr, data,
 						 len, &dlen);
 		else
 			decrypted = ccmp_decrypt(tk, hdr, data, len, &dlen);
@@ -440,7 +440,7 @@ skip_replay_det:
 						     len, &dlen);
 		else if (sta->pairwise_cipher == WPA_CIPHER_GCMP ||
 			 sta->pairwise_cipher == WPA_CIPHER_GCMP_256)
-			decrypted = gcmp_decrypt(sta->ptk.tk, sta->tk_len,
+			decrypted = gcmp_decrypt(sta->ptk.tk, sta->ptk.tk_len,
 						 hdr, data, len, &dlen);
 		else
 			decrypted = ccmp_decrypt(sta->ptk.tk, hdr, data, len,

wlantest/rx_eapol.c

@@ -136,7 +136,6 @@ static int try_pmk(struct wlantest *wt, struct wlantest_bss *bss,
 		return -1;
 	}
 
-	sta->tk_len = wpa_cipher_key_len(sta->pairwise_cipher);
 	wpa_printf(MSG_INFO, "Derived PTK for STA " MACSTR " BSSID " MACSTR,
 		   MAC2STR(sta->addr), MAC2STR(bss->bssid));
 	sta->counters[WLANTEST_STA_COUNTER_PTK_LEARNED]++;

wlantest/wlantest.h

@@ -72,7 +72,6 @@ struct wlantest_sta {
 	u8 anonce[32]; /* ANonce from the previous EAPOL-Key msg 1/4 or 3/4 */
 	u8 snonce[32]; /* SNonce from the previous EAPOL-Key msg 2/4 */
 	struct wpa_ptk ptk; /* Derived PTK */
-	size_t tk_len;
 	int ptk_set;
 	struct wpa_ptk tptk; /* Derived PTK during rekeying */
 	int tptk_set;