-#if EAP_TTLS_VERSION > 0
- struct tls_keys keys;
- u8 *challenge, *rnd;
-#endif /* EAP_TTLS_VERSION */
-
- if (data->ttls_version == 0) {
- return eap_peer_tls_derive_key(sm, &data->ssl,
- "ttls challenge", len);
- }
-
-#if EAP_TTLS_VERSION > 0
-
- os_memset(&keys, 0, sizeof(keys));
- if (tls_connection_get_keys(sm->ssl_ctx, data->ssl.conn, &keys) ||
- keys.client_random == NULL || keys.server_random == NULL ||
- keys.inner_secret == NULL) {
- wpa_printf(MSG_INFO, "EAP-TTLS: Could not get inner secret, "
- "client random, or server random to derive "
- "implicit challenge");
- return NULL;
- }
-
- rnd = os_malloc(keys.client_random_len + keys.server_random_len);
- challenge = os_malloc(len);
- if (rnd == NULL || challenge == NULL) {
- wpa_printf(MSG_INFO, "EAP-TTLS: No memory for implicit "
- "challenge derivation");
- os_free(rnd);
- os_free(challenge);
- return NULL;
- }
- os_memcpy(rnd, keys.server_random, keys.server_random_len);
- os_memcpy(rnd + keys.server_random_len, keys.client_random,
- keys.client_random_len);
-
- if (tls_prf(keys.inner_secret, keys.inner_secret_len,
- "inner application challenge", rnd,
- keys.client_random_len + keys.server_random_len,
- challenge, len)) {
- wpa_printf(MSG_DEBUG, "EAP-TTLS: Failed to derive implicit "
- "challenge");
- os_free(rnd);
- os_free(challenge);
- return NULL;
- }
-
- os_free(rnd);
-
- wpa_hexdump_key(MSG_DEBUG, "EAP-TTLS: Derived implicit challenge",
- challenge, len);
-
- return challenge;
-
-#else /* EAP_TTLS_VERSION */
-
- return NULL;
-
-#endif /* EAP_TTLS_VERSION */
-}
-
-
-static void eap_ttlsv1_phase2_eap_finish(struct eap_sm *sm,
- struct eap_ttls_data *data,
- struct eap_method_ret *ret)
-{
-#if EAP_TTLS_VERSION > 0
- if (data->ttls_version > 0) {
- const struct eap_method *m = data->phase2_method;
- void *priv = data->phase2_priv;
-
- /* TTLSv1 requires TLS/IA FinalPhaseFinished */
- if (ret->decision == DECISION_UNCOND_SUCC)
- ret->decision = DECISION_COND_SUCC;
- ret->methodState = METHOD_CONT;
-
- if (ret->decision == DECISION_COND_SUCC &&
- m->isKeyAvailable && m->getKey &&
- m->isKeyAvailable(sm, priv)) {
- u8 *key;
- size_t key_len;
- key = m->getKey(sm, priv, &key_len);
- if (key) {
- eap_ttls_ia_permute_inner_secret(
- sm, data, key, key_len);
- os_free(key);
- }
- }
- }
-#endif /* EAP_TTLS_VERSION */