2 * EAP peer method: EAP-TLS (RFC 2716)
3 * Copyright (c) 2004-2008, 2012, 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;
29 static void * eap_tls_init(struct eap_sm *sm)
31 struct eap_tls_data *data;
32 struct eap_peer_config *config = eap_get_config(sm);
34 ((sm->init_phase2 ? config->private_key2 : config->private_key)
36 (sm->init_phase2 ? config->engine2 : config->engine) == 0)) {
37 wpa_printf(MSG_INFO, "EAP-TLS: Private key not configured");
41 data = os_zalloc(sizeof(*data));
45 data->ssl_ctx = sm->init_phase2 && sm->ssl_ctx2 ? sm->ssl_ctx2 :
48 if (eap_peer_tls_ssl_init(sm, &data->ssl, config, EAP_TYPE_TLS)) {
49 wpa_printf(MSG_INFO, "EAP-TLS: Failed to initialize SSL.");
50 eap_tls_deinit(sm, data);
52 wpa_printf(MSG_DEBUG, "EAP-TLS: Requesting Smartcard "
54 eap_sm_request_pin(sm);
56 } else if (config->private_key && !config->private_key_passwd)
58 wpa_printf(MSG_DEBUG, "EAP-TLS: Requesting private "
60 eap_sm_request_passphrase(sm);
66 data->eap_type = EAP_TYPE_TLS;
73 static void * eap_unauth_tls_init(struct eap_sm *sm)
75 struct eap_tls_data *data;
76 struct eap_peer_config *config = eap_get_config(sm);
78 data = os_zalloc(sizeof(*data));
82 data->ssl_ctx = sm->init_phase2 && sm->ssl_ctx2 ? sm->ssl_ctx2 :
85 if (eap_peer_tls_ssl_init(sm, &data->ssl, config,
86 EAP_UNAUTH_TLS_TYPE)) {
87 wpa_printf(MSG_INFO, "EAP-TLS: Failed to initialize SSL.");
88 eap_tls_deinit(sm, data);
92 data->eap_type = EAP_UNAUTH_TLS_TYPE;
96 #endif /* EAP_UNAUTH_TLS */
99 static void eap_tls_deinit(struct eap_sm *sm, void *priv)
101 struct eap_tls_data *data = priv;
104 eap_peer_tls_ssl_deinit(sm, &data->ssl);
105 os_free(data->key_data);
110 static struct wpabuf * eap_tls_failure(struct eap_sm *sm,
111 struct eap_tls_data *data,
112 struct eap_method_ret *ret, int res,
113 struct wpabuf *resp, u8 id)
115 wpa_printf(MSG_DEBUG, "EAP-TLS: TLS processing failed");
117 ret->methodState = METHOD_DONE;
118 ret->decision = DECISION_FAIL;
121 struct eap_peer_config *config = eap_get_config(sm);
124 * The TLS handshake failed. So better forget the old
125 * PIN. It may be wrong, we cannot be sure but trying
126 * the wrong one again might block it on the card--so
127 * better ask the user again.
129 os_free(config->pin);
136 * This is likely an alert message, so send it instead of just
142 return eap_peer_tls_build_ack(id, data->eap_type, 0);
146 static void eap_tls_success(struct eap_sm *sm, struct eap_tls_data *data,
147 struct eap_method_ret *ret)
149 wpa_printf(MSG_DEBUG, "EAP-TLS: Done");
151 ret->methodState = METHOD_DONE;
152 ret->decision = DECISION_UNCOND_SUCC;
154 os_free(data->key_data);
155 data->key_data = eap_peer_tls_derive_key(sm, &data->ssl,
156 "client EAP encryption",
159 if (data->key_data) {
160 wpa_hexdump_key(MSG_DEBUG, "EAP-TLS: Derived key",
161 data->key_data, EAP_TLS_KEY_LEN);
162 wpa_hexdump_key(MSG_DEBUG, "EAP-TLS: Derived EMSK",
163 data->key_data + EAP_TLS_KEY_LEN,
166 wpa_printf(MSG_INFO, "EAP-TLS: Failed to derive key");
171 static struct wpabuf * eap_tls_process(struct eap_sm *sm, void *priv,
172 struct eap_method_ret *ret,
173 const struct wpabuf *reqData)
180 struct eap_tls_data *data = priv;
182 pos = eap_peer_tls_process_init(sm, &data->ssl, data->eap_type, ret,
183 reqData, &left, &flags);
186 id = eap_get_id(reqData);
188 if (flags & EAP_TLS_FLAGS_START) {
189 wpa_printf(MSG_DEBUG, "EAP-TLS: Start");
190 left = 0; /* make sure that this frame is empty, even though it
191 * should always be, anyway */
195 res = eap_peer_tls_process_helper(sm, &data->ssl, data->eap_type, 0,
196 id, pos, left, &resp);
199 return eap_tls_failure(sm, data, ret, res, resp, id);
202 if (tls_connection_established(data->ssl_ctx, data->ssl.conn))
203 eap_tls_success(sm, data, ret);
207 return eap_peer_tls_build_ack(id, data->eap_type, 0);
214 static Boolean eap_tls_has_reauth_data(struct eap_sm *sm, void *priv)
216 struct eap_tls_data *data = priv;
217 return tls_connection_established(data->ssl_ctx, data->ssl.conn);
221 static void eap_tls_deinit_for_reauth(struct eap_sm *sm, void *priv)
226 static void * eap_tls_init_for_reauth(struct eap_sm *sm, void *priv)
228 struct eap_tls_data *data = priv;
229 os_free(data->key_data);
230 data->key_data = NULL;
231 if (eap_peer_tls_reauth_init(sm, &data->ssl)) {
239 static int eap_tls_get_status(struct eap_sm *sm, void *priv, char *buf,
240 size_t buflen, int verbose)
242 struct eap_tls_data *data = priv;
243 return eap_peer_tls_status(sm, &data->ssl, buf, buflen, verbose);
247 static Boolean eap_tls_isKeyAvailable(struct eap_sm *sm, void *priv)
249 struct eap_tls_data *data = priv;
250 return data->key_data != NULL;
254 static u8 * eap_tls_getKey(struct eap_sm *sm, void *priv, size_t *len)
256 struct eap_tls_data *data = priv;
259 if (data->key_data == NULL)
262 key = os_malloc(EAP_TLS_KEY_LEN);
266 *len = EAP_TLS_KEY_LEN;
267 os_memcpy(key, data->key_data, EAP_TLS_KEY_LEN);
273 static u8 * eap_tls_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
275 struct eap_tls_data *data = priv;
278 if (data->key_data == NULL)
281 key = os_malloc(EAP_EMSK_LEN);
286 os_memcpy(key, data->key_data + EAP_TLS_KEY_LEN, EAP_EMSK_LEN);
292 int eap_peer_tls_register(void)
294 struct eap_method *eap;
297 eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
298 EAP_VENDOR_IETF, EAP_TYPE_TLS, "TLS");
302 eap->init = eap_tls_init;
303 eap->deinit = eap_tls_deinit;
304 eap->process = eap_tls_process;
305 eap->isKeyAvailable = eap_tls_isKeyAvailable;
306 eap->getKey = eap_tls_getKey;
307 eap->get_status = eap_tls_get_status;
308 eap->has_reauth_data = eap_tls_has_reauth_data;
309 eap->deinit_for_reauth = eap_tls_deinit_for_reauth;
310 eap->init_for_reauth = eap_tls_init_for_reauth;
311 eap->get_emsk = eap_tls_get_emsk;
313 ret = eap_peer_method_register(eap);
315 eap_peer_method_free(eap);
320 #ifdef EAP_UNAUTH_TLS
321 int eap_peer_unauth_tls_register(void)
323 struct eap_method *eap;
326 eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
327 EAP_VENDOR_UNAUTH_TLS,
328 EAP_VENDOR_TYPE_UNAUTH_TLS, "UNAUTH-TLS");
332 eap->init = eap_unauth_tls_init;
333 eap->deinit = eap_tls_deinit;
334 eap->process = eap_tls_process;
335 eap->isKeyAvailable = eap_tls_isKeyAvailable;
336 eap->getKey = eap_tls_getKey;
337 eap->get_status = eap_tls_get_status;
338 eap->has_reauth_data = eap_tls_has_reauth_data;
339 eap->deinit_for_reauth = eap_tls_deinit_for_reauth;
340 eap->init_for_reauth = eap_tls_init_for_reauth;
341 eap->get_emsk = eap_tls_get_emsk;
343 ret = eap_peer_method_register(eap);
345 eap_peer_method_free(eap);
348 #endif /* EAP_UNAUTH_TLS */