2 * EAP peer method: EAP-TLS (RFC 2716)
3 * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
12 #include "crypto/tls.h"
14 #include "eap_tls_common.h"
15 #include "eap_config.h"
18 static void eap_tls_deinit(struct eap_sm *sm, void *priv);
22 struct eap_ssl_data ssl;
27 static void * eap_tls_init(struct eap_sm *sm)
29 struct eap_tls_data *data;
30 struct eap_peer_config *config = eap_get_config(sm);
32 ((sm->init_phase2 ? config->private_key2 : config->private_key)
34 (sm->init_phase2 ? config->engine2 : config->engine) == 0)) {
35 wpa_printf(MSG_INFO, "EAP-TLS: Private key not configured");
39 data = os_zalloc(sizeof(*data));
43 if (eap_peer_tls_ssl_init(sm, &data->ssl, config)) {
44 wpa_printf(MSG_INFO, "EAP-TLS: Failed to initialize SSL.");
45 eap_tls_deinit(sm, data);
47 wpa_printf(MSG_DEBUG, "EAP-TLS: Requesting Smartcard "
49 eap_sm_request_pin(sm);
51 } else if (config->private_key && !config->private_key_passwd)
53 wpa_printf(MSG_DEBUG, "EAP-TLS: Requesting private "
55 eap_sm_request_passphrase(sm);
65 static void eap_tls_deinit(struct eap_sm *sm, void *priv)
67 struct eap_tls_data *data = priv;
70 eap_peer_tls_ssl_deinit(sm, &data->ssl);
71 os_free(data->key_data);
76 static struct wpabuf * eap_tls_failure(struct eap_sm *sm,
77 struct eap_tls_data *data,
78 struct eap_method_ret *ret, int res,
79 struct wpabuf *resp, u8 id)
81 wpa_printf(MSG_DEBUG, "EAP-TLS: TLS processing failed");
83 ret->methodState = METHOD_DONE;
84 ret->decision = DECISION_FAIL;
87 struct eap_peer_config *config = eap_get_config(sm);
90 * The TLS handshake failed. So better forget the old
91 * PIN. It may be wrong, we cannot be sure but trying
92 * the wrong one again might block it on the card--so
93 * better ask the user again.
102 * This is likely an alert message, so send it instead of just
108 return eap_peer_tls_build_ack(id, EAP_TYPE_TLS, 0);
112 static void eap_tls_success(struct eap_sm *sm, struct eap_tls_data *data,
113 struct eap_method_ret *ret)
115 wpa_printf(MSG_DEBUG, "EAP-TLS: Done");
117 ret->methodState = METHOD_DONE;
118 ret->decision = DECISION_UNCOND_SUCC;
120 os_free(data->key_data);
121 data->key_data = eap_peer_tls_derive_key(sm, &data->ssl,
122 "client EAP encryption",
125 if (data->key_data) {
126 wpa_hexdump_key(MSG_DEBUG, "EAP-TLS: Derived key",
127 data->key_data, EAP_TLS_KEY_LEN);
128 wpa_hexdump_key(MSG_DEBUG, "EAP-TLS: Derived EMSK",
129 data->key_data + EAP_TLS_KEY_LEN,
132 wpa_printf(MSG_INFO, "EAP-TLS: Failed to derive key");
137 static struct wpabuf * eap_tls_process(struct eap_sm *sm, void *priv,
138 struct eap_method_ret *ret,
139 const struct wpabuf *reqData)
146 struct eap_tls_data *data = priv;
148 pos = eap_peer_tls_process_init(sm, &data->ssl, EAP_TYPE_TLS, ret,
149 reqData, &left, &flags);
152 id = eap_get_id(reqData);
154 if (flags & EAP_TLS_FLAGS_START) {
155 wpa_printf(MSG_DEBUG, "EAP-TLS: Start");
156 left = 0; /* make sure that this frame is empty, even though it
157 * should always be, anyway */
161 res = eap_peer_tls_process_helper(sm, &data->ssl, EAP_TYPE_TLS, 0, id,
165 return eap_tls_failure(sm, data, ret, res, resp, id);
168 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn))
169 eap_tls_success(sm, data, ret);
173 return eap_peer_tls_build_ack(id, EAP_TYPE_TLS, 0);
180 static Boolean eap_tls_has_reauth_data(struct eap_sm *sm, void *priv)
182 struct eap_tls_data *data = priv;
183 return tls_connection_established(sm->ssl_ctx, data->ssl.conn);
187 static void eap_tls_deinit_for_reauth(struct eap_sm *sm, void *priv)
192 static void * eap_tls_init_for_reauth(struct eap_sm *sm, void *priv)
194 struct eap_tls_data *data = priv;
195 os_free(data->key_data);
196 data->key_data = NULL;
197 if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
205 static int eap_tls_get_status(struct eap_sm *sm, void *priv, char *buf,
206 size_t buflen, int verbose)
208 struct eap_tls_data *data = priv;
209 return eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
213 static Boolean eap_tls_isKeyAvailable(struct eap_sm *sm, void *priv)
215 struct eap_tls_data *data = priv;
216 return data->key_data != NULL;
220 static u8 * eap_tls_getKey(struct eap_sm *sm, void *priv, size_t *len)
222 struct eap_tls_data *data = priv;
225 if (data->key_data == NULL)
228 key = os_malloc(EAP_TLS_KEY_LEN);
232 *len = EAP_TLS_KEY_LEN;
233 os_memcpy(key, data->key_data, EAP_TLS_KEY_LEN);
239 static u8 * eap_tls_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
241 struct eap_tls_data *data = priv;
244 if (data->key_data == NULL)
247 key = os_malloc(EAP_EMSK_LEN);
252 os_memcpy(key, data->key_data + EAP_TLS_KEY_LEN, EAP_EMSK_LEN);
258 int eap_peer_tls_register(void)
260 struct eap_method *eap;
263 eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
264 EAP_VENDOR_IETF, EAP_TYPE_TLS, "TLS");
268 eap->init = eap_tls_init;
269 eap->deinit = eap_tls_deinit;
270 eap->process = eap_tls_process;
271 eap->isKeyAvailable = eap_tls_isKeyAvailable;
272 eap->getKey = eap_tls_getKey;
273 eap->get_status = eap_tls_get_status;
274 eap->has_reauth_data = eap_tls_has_reauth_data;
275 eap->deinit_for_reauth = eap_tls_deinit_for_reauth;
276 eap->init_for_reauth = eap_tls_init_for_reauth;
277 eap->get_emsk = eap_tls_get_emsk;
279 ret = eap_peer_method_register(eap);
281 eap_peer_method_free(eap);