diff --git a/hostapd/config_file.c b/hostapd/config_file.c
index b3dc8f81a..05dc96736 100644
--- a/hostapd/config_file.c
+++ b/hostapd/config_file.c
@@ -4577,6 +4577,12 @@ static int hostapd_config_fill(struct hostapd_config *conf,
 		bss->disable_11ac = !!atoi(pos);
 	} else if (os_strcmp(buf, "disable_11ax") == 0) {
 		bss->disable_11ax = !!atoi(pos);
+#ifdef CONFIG_PASN
+#ifdef CONFIG_TESTING_OPTIONS
+	} else if (os_strcmp(buf, "force_kdk_derivation") == 0) {
+		bss->force_kdk_derivation = atoi(pos);
+#endif /* CONFIG_TESTING_OPTIONS */
+#endif /* CONFIG_PASN */
 	} else {
 		wpa_printf(MSG_ERROR,
 			   "Line %d: unknown configuration item '%s'",
diff --git a/src/ap/ap_config.h b/src/ap/ap_config.h
index f7a344e0e..4eb4ee272 100644
--- a/src/ap/ap_config.h
+++ b/src/ap/ap_config.h
@@ -862,6 +862,16 @@ struct hostapd_bss_config {
 	 */
 	u8 mka_psk_set;
 #endif /* CONFIG_MACSEC */
+
+#ifdef CONFIG_PASN
+#ifdef CONFIG_TESTING_OPTIONS
+	/*
+	 * Normally, KDK should be derived if and only if both sides support
+	 * secure LTF. Allow forcing KDK derivation for testing purposes.
+	 */
+	int force_kdk_derivation;
+#endif /* CONFIG_TESTING_OPTIONS */
+#endif /* CONFIG_PASN */
 };
 
 /**
diff --git a/src/ap/wpa_auth.c b/src/ap/wpa_auth.c
index 82a97468d..ebf35cf30 100644
--- a/src/ap/wpa_auth.c
+++ b/src/ap/wpa_auth.c
@@ -2290,7 +2290,8 @@ static int wpa_derive_ptk(struct wpa_state_machine *sm, const u8 *snonce,
 		akmp |= WPA_KEY_MGMT_PSK_SHA256;
 	return wpa_pmk_to_ptk(pmk, pmk_len, "Pairwise key expansion",
 			      sm->wpa_auth->addr, sm->addr, sm->ANonce, snonce,
-			      ptk, akmp, sm->pairwise, z, z_len);
+			      ptk, akmp, sm->pairwise, z, z_len,
+			      sm->wpa_auth->conf.kdk ? WPA_KDK_MAX_LEN : 0);
 }
 
 
diff --git a/src/ap/wpa_auth.h b/src/ap/wpa_auth.h
index 5f9df9c89..5dc3cc5c6 100644
--- a/src/ap/wpa_auth.h
+++ b/src/ap/wpa_auth.h
@@ -262,6 +262,12 @@ struct wpa_auth_config {
 #ifdef CONFIG_DPP2
 	int dpp_pfs;
 #endif /* CONFIG_DPP2 */
+
+	/*
+	 * If set Key Derivation Key should be derived as part of PMK to
+	 * PTK derivation.
+	 */
+	bool kdk;
 };
 
 typedef enum {
diff --git a/src/ap/wpa_auth_glue.c b/src/ap/wpa_auth_glue.c
index c01654f38..a829361b5 100644
--- a/src/ap/wpa_auth_glue.c
+++ b/src/ap/wpa_auth_glue.c
@@ -208,6 +208,11 @@ static void hostapd_wpa_auth_conf(struct hostapd_bss_config *conf,
 #ifdef CONFIG_DPP2
 	wconf->dpp_pfs = conf->dpp_pfs;
 #endif /* CONFIG_DPP2 */
+#ifdef CONFIG_PASN
+#ifdef CONFIG_TESTING_OPTIONS
+	wconf->kdk = conf->force_kdk_derivation;
+#endif /* CONFIG_TESTING_OPTIONS */
+#endif /* CONFIG_PASN */
 }
 
 
diff --git a/src/common/wpa_common.c b/src/common/wpa_common.c
index 3d04650d3..750a3c8c4 100644
--- a/src/common/wpa_common.c
+++ b/src/common/wpa_common.c
@@ -333,6 +333,7 @@ int wpa_eapol_key_mic(const u8 *key, size_t key_len, int akmp, int ver,
  * @ptk: Buffer for pairwise transient key
  * @akmp: Negotiated AKM
  * @cipher: Negotiated pairwise cipher
+ * @kdk_len: The length in octets that should be derived for KDK
  * Returns: 0 on success, -1 on failure
  *
  * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
@@ -348,12 +349,13 @@ int wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
 		   const u8 *addr1, const u8 *addr2,
 		   const u8 *nonce1, const u8 *nonce2,
 		   struct wpa_ptk *ptk, int akmp, int cipher,
-		   const u8 *z, size_t z_len)
+		   const u8 *z, size_t z_len, size_t kdk_len)
 {
 #define MAX_Z_LEN 66 /* with NIST P-521 */
 	u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN + MAX_Z_LEN];
 	size_t data_len = 2 * ETH_ALEN + 2 * WPA_NONCE_LEN;
-	u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN];
+	u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN +
+		WPA_KDK_MAX_LEN];
 	size_t ptk_len;
 #ifdef CONFIG_OWE
 	int owe_ptk_workaround = 0;
@@ -395,16 +397,24 @@ int wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
 		data_len += z_len;
 	}
 
+	if (kdk_len > WPA_KDK_MAX_LEN) {
+		wpa_printf(MSG_ERROR,
+			   "WPA: KDK len=%zu exceeds max supported len",
+			   kdk_len);
+		return -1;
+	}
+
 	ptk->kck_len = wpa_kck_len(akmp, pmk_len);
 	ptk->kek_len = wpa_kek_len(akmp, pmk_len);
 	ptk->tk_len = wpa_cipher_key_len(cipher);
+	ptk->kdk_len = kdk_len;
 	if (ptk->tk_len == 0) {
 		wpa_printf(MSG_ERROR,
 			   "WPA: Unsupported cipher (0x%x) used in PTK derivation",
 			   cipher);
 		return -1;
 	}
-	ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len;
+	ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len + ptk->kdk_len;
 
 	if (wpa_key_mgmt_sha384(akmp)) {
 #if defined(CONFIG_SUITEB192) || defined(CONFIG_FILS)
@@ -488,6 +498,12 @@ int wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
 	os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len);
 	wpa_hexdump_key(MSG_DEBUG, "WPA: TK", ptk->tk, ptk->tk_len);
 
+	if (kdk_len) {
+		os_memcpy(ptk->kdk, tmp + ptk->kck_len + ptk->kek_len +
+			  ptk->tk_len, ptk->kdk_len);
+		wpa_hexdump_key(MSG_DEBUG, "WPA: KDK", ptk->kdk, ptk->kdk_len);
+	}
+
 	ptk->kek2_len = 0;
 	ptk->kck2_len = 0;
 
diff --git a/src/common/wpa_common.h b/src/common/wpa_common.h
index 23e5418e6..44b803e65 100644
--- a/src/common/wpa_common.h
+++ b/src/common/wpa_common.h
@@ -216,6 +216,7 @@ struct wpa_eapol_key {
 #define WPA_KCK_MAX_LEN 32
 #define WPA_KEK_MAX_LEN 64
 #define WPA_TK_MAX_LEN 32
+#define WPA_KDK_MAX_LEN 32
 #define FILS_ICK_MAX_LEN 48
 #define FILS_FT_MAX_LEN 48
 
@@ -229,11 +230,13 @@ struct wpa_ptk {
 	u8 tk[WPA_TK_MAX_LEN]; /* Temporal Key (TK) */
 	u8 kck2[WPA_KCK_MAX_LEN]; /* FT reasoc Key Confirmation Key (KCK2) */
 	u8 kek2[WPA_KEK_MAX_LEN]; /* FT reassoc Key Encryption Key (KEK2) */
+	u8 kdk[WPA_KDK_MAX_LEN]; /* Key Derivation Key */
 	size_t kck_len;
 	size_t kek_len;
 	size_t tk_len;
 	size_t kck2_len;
 	size_t kek2_len;
+	size_t kdk_len;
 	int installed; /* 1 if key has already been installed to driver */
 };
 
@@ -383,7 +386,7 @@ int wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
 		   const u8 *addr1, const u8 *addr2,
 		   const u8 *nonce1, const u8 *nonce2,
 		   struct wpa_ptk *ptk, int akmp, int cipher,
-		   const u8 *z, size_t z_len);
+		   const u8 *z, size_t z_len, size_t kdk_len);
 int fils_rmsk_to_pmk(int akmp, const u8 *rmsk, size_t rmsk_len,
 		     const u8 *snonce, const u8 *anonce, const u8 *dh_ss,
 		     size_t dh_ss_len, u8 *pmk, size_t *pmk_len);
diff --git a/src/rsn_supp/wpa.c b/src/rsn_supp/wpa.c
index 834658324..24d7422bf 100644
--- a/src/rsn_supp/wpa.c
+++ b/src/rsn_supp/wpa.c
@@ -606,7 +606,8 @@ static int wpa_derive_ptk(struct wpa_sm *sm, const unsigned char *src_addr,
 	return wpa_pmk_to_ptk(sm->pmk, sm->pmk_len, "Pairwise key expansion",
 			      sm->own_addr, sm->bssid, sm->snonce,
 			      key->key_nonce, ptk, akmp,
-			      sm->pairwise_cipher, z, z_len);
+			      sm->pairwise_cipher, z, z_len,
+			      sm->kdk ? WPA_KDK_MAX_LEN : 0);
 }
 
 
@@ -3184,6 +3185,7 @@ void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config)
 		sm->p2p = config->p2p;
 		sm->wpa_rsc_relaxation = config->wpa_rsc_relaxation;
 		sm->owe_ptk_workaround = config->owe_ptk_workaround;
+		sm->kdk = config->kdk;
 #ifdef CONFIG_FILS
 		if (config->fils_cache_id) {
 			sm->fils_cache_id_set = 1;
@@ -3206,6 +3208,7 @@ void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config)
 		sm->wpa_rsc_relaxation = 0;
 		sm->owe_ptk_workaround = 0;
 		sm->beacon_prot = 0;
+		sm->kdk = false;
 	}
 }
 
diff --git a/src/rsn_supp/wpa.h b/src/rsn_supp/wpa.h
index 2142772d7..fda3979df 100644
--- a/src/rsn_supp/wpa.h
+++ b/src/rsn_supp/wpa.h
@@ -130,6 +130,7 @@ struct rsn_supp_config {
 	int owe_ptk_workaround;
 	const u8 *fils_cache_id;
 	int beacon_prot;
+	bool kdk;
 };
 
 #ifndef CONFIG_NO_WPA
diff --git a/src/rsn_supp/wpa_i.h b/src/rsn_supp/wpa_i.h
index 96b07fc68..1ac453c77 100644
--- a/src/rsn_supp/wpa_i.h
+++ b/src/rsn_supp/wpa_i.h
@@ -73,6 +73,12 @@ struct wpa_sm {
 			     * to be used */
 	int keyidx_active; /* Key ID for the active TK */
 
+	/*
+	 * If set Key Derivation Key should be derived as part of PMK to
+	 * PTK derivation.
+	 */
+	bool kdk;
+
 	u8 own_addr[ETH_ALEN];
 	const char *ifname;
 	const char *bridge_ifname;
diff --git a/wlantest/rx_eapol.c b/wlantest/rx_eapol.c
index 1e5d66735..cdc1fff0c 100644
--- a/wlantest/rx_eapol.c
+++ b/wlantest/rx_eapol.c
@@ -128,7 +128,7 @@ static int try_pmk(struct wlantest *wt, struct wlantest_bss *bss,
 				  "Pairwise key expansion",
 				  bss->bssid, sta->addr, sta->anonce,
 				  sta->snonce, &ptk, sta->key_mgmt,
-				  sta->pairwise_cipher, NULL, 0) < 0 ||
+				  sta->pairwise_cipher, NULL, 0, 0) < 0 ||
 		   check_mic(ptk.kck, ptk.kck_len, sta->key_mgmt, ver, data,
 			     len) < 0) {
 		return -1;
diff --git a/wpa_supplicant/config.c b/wpa_supplicant/config.c
index 4c1e42260..60129cf48 100644
--- a/wpa_supplicant/config.c
+++ b/wpa_supplicant/config.c
@@ -5149,6 +5149,11 @@ static const struct global_parse_data global_fields[] = {
 	{ INT_RANGE(extended_key_id, 0, 1), 0 },
 #endif /* CONFIG_WNM */
 	{ INT_RANGE(wowlan_disconnect_on_deinit, 0, 1), 0},
+#ifdef CONFIG_PASN
+#ifdef CONFIG_TESTING_OPTIONS
+	{ INT_RANGE(force_kdk_derivation, 0, 1), 0 },
+#endif /* CONFIG_TESTING_OPTIONS */
+#endif /* CONFIG_PASN */
 };
 
 #undef FUNC
diff --git a/wpa_supplicant/config.h b/wpa_supplicant/config.h
index 611b99318..6ce737c03 100644
--- a/wpa_supplicant/config.h
+++ b/wpa_supplicant/config.h
@@ -1608,6 +1608,16 @@ struct wpa_config {
 	 * 1 = Trigger disconnection
 	 */
 	int wowlan_disconnect_on_deinit;
+
+#ifdef CONFIG_PASN
+#ifdef CONFIG_TESTING_OPTIONS
+	/*
+	 * Normally, KDK should be derived if and only if both sides support
+	 * secure LTF. Allow forcing KDK derivation for testing purposes.
+	 */
+	int force_kdk_derivation;
+#endif /* CONFIG_TESTING_OPTIONS */
+#endif /* CONFIG_PASN*/
 };
 
 
diff --git a/wpa_supplicant/wpas_glue.c b/wpa_supplicant/wpas_glue.c
index a9a66baad..6cee1e790 100644
--- a/wpa_supplicant/wpas_glue.c
+++ b/wpa_supplicant/wpas_glue.c
@@ -1451,5 +1451,10 @@ void wpa_supplicant_rsn_supp_set_config(struct wpa_supplicant *wpa_s,
 #endif /* CONFIG_FILS */
 		conf.beacon_prot = ssid->beacon_prot;
 	}
+#ifdef CONFIG_PASN
+#ifdef CONFIG_TESTING_OPTIONS
+	conf.kdk = wpa_s->conf->force_kdk_derivation;
+#endif /* CONFIG_TESTING_OPTIONS */
+#endif /* CONFIG_PASN*/
 	wpa_sm_set_config(wpa_s->wpa, ssid ? &conf : NULL);
 }