2 * EAP peer method: EAP-TLS (RFC 2716)
3 * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
19 #include "eap_tls_common.h"
20 #include "config_ssid.h"
24 static void eap_tls_deinit(struct eap_sm *sm, void *priv);
28 struct eap_ssl_data ssl;
33 static void * eap_tls_init(struct eap_sm *sm)
35 struct eap_tls_data *data;
36 struct wpa_ssid *config = eap_get_config(sm);
38 ((sm->init_phase2 ? config->private_key2 : config->private_key)
39 == NULL && config->engine == 0)) {
40 wpa_printf(MSG_INFO, "EAP-TLS: Private key not configured");
44 data = os_zalloc(sizeof(*data));
48 if (eap_tls_ssl_init(sm, &data->ssl, config)) {
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);
70 static void eap_tls_deinit(struct eap_sm *sm, void *priv)
72 struct eap_tls_data *data = priv;
75 eap_tls_ssl_deinit(sm, &data->ssl);
76 os_free(data->key_data);
81 static u8 * eap_tls_failure(struct eap_sm *sm, struct eap_tls_data *data,
82 struct eap_method_ret *ret, int res, u8 *resp,
83 u8 id, size_t *respDataLen)
85 wpa_printf(MSG_DEBUG, "EAP-TLS: TLS processing failed");
87 ret->methodState = METHOD_DONE;
88 ret->decision = DECISION_FAIL;
91 struct wpa_ssid *config = eap_get_config(sm);
94 * The TLS handshake failed. So better forget the old
95 * PIN. It may be wrong, we cannot be sure but trying
96 * the wrong one again might block it on the card--so
97 * better ask the user again.
106 * This is likely an alert message, so send it instead of just
112 return eap_tls_build_ack(&data->ssl, respDataLen, id, EAP_TYPE_TLS, 0);
116 static void eap_tls_success(struct eap_sm *sm, struct eap_tls_data *data,
117 struct eap_method_ret *ret)
119 wpa_printf(MSG_DEBUG, "EAP-TLS: Done");
121 ret->methodState = METHOD_DONE;
122 ret->decision = DECISION_UNCOND_SUCC;
124 os_free(data->key_data);
125 data->key_data = eap_tls_derive_key(sm, &data->ssl,
126 "client EAP encryption",
127 EAP_TLS_KEY_LEN + EAP_EMSK_LEN);
128 if (data->key_data) {
129 wpa_hexdump_key(MSG_DEBUG, "EAP-TLS: Derived key",
130 data->key_data, EAP_TLS_KEY_LEN);
131 wpa_hexdump_key(MSG_DEBUG, "EAP-TLS: Derived EMSK",
132 data->key_data + EAP_TLS_KEY_LEN,
135 wpa_printf(MSG_INFO, "EAP-TLS: Failed to derive key");
140 static u8 * eap_tls_process(struct eap_sm *sm, void *priv,
141 struct eap_method_ret *ret,
142 const u8 *reqData, size_t reqDataLen,
145 const struct eap_hdr *req;
150 struct eap_tls_data *data = priv;
152 pos = eap_tls_process_init(sm, &data->ssl, EAP_TYPE_TLS, ret,
153 reqData, reqDataLen, &left, &flags);
156 req = (const struct eap_hdr *) reqData;
157 id = req->identifier;
159 if (flags & EAP_TLS_FLAGS_START) {
160 wpa_printf(MSG_DEBUG, "EAP-TLS: Start");
161 left = 0; /* make sure that this frame is empty, even though it
162 * should always be, anyway */
166 res = eap_tls_process_helper(sm, &data->ssl, EAP_TYPE_TLS, 0, id, pos,
167 left, &resp, respDataLen);
170 return eap_tls_failure(sm, data, ret, res, resp, id,
174 if (tls_connection_established(sm->ssl_ctx, data->ssl.conn))
175 eap_tls_success(sm, data, ret);
178 return eap_tls_build_ack(&data->ssl, respDataLen, id,
186 static Boolean eap_tls_has_reauth_data(struct eap_sm *sm, void *priv)
188 struct eap_tls_data *data = priv;
189 return tls_connection_established(sm->ssl_ctx, data->ssl.conn);
193 static void eap_tls_deinit_for_reauth(struct eap_sm *sm, void *priv)
198 static void * eap_tls_init_for_reauth(struct eap_sm *sm, void *priv)
200 struct eap_tls_data *data = priv;
201 os_free(data->key_data);
202 data->key_data = NULL;
203 if (eap_tls_reauth_init(sm, &data->ssl)) {
211 static int eap_tls_get_status(struct eap_sm *sm, void *priv, char *buf,
212 size_t buflen, int verbose)
214 struct eap_tls_data *data = priv;
215 return eap_tls_status(sm, &data->ssl, buf, buflen, verbose);
219 static Boolean eap_tls_isKeyAvailable(struct eap_sm *sm, void *priv)
221 struct eap_tls_data *data = priv;
222 return data->key_data != NULL;
226 static u8 * eap_tls_getKey(struct eap_sm *sm, void *priv, size_t *len)
228 struct eap_tls_data *data = priv;
231 if (data->key_data == NULL)
234 key = os_malloc(EAP_TLS_KEY_LEN);
238 *len = EAP_TLS_KEY_LEN;
239 os_memcpy(key, data->key_data, EAP_TLS_KEY_LEN);
245 static u8 * eap_tls_get_emsk(struct eap_sm *sm, void *priv, size_t *len)
247 struct eap_tls_data *data = priv;
250 if (data->key_data == NULL)
253 key = os_malloc(EAP_EMSK_LEN);
258 os_memcpy(key, data->key_data + EAP_TLS_KEY_LEN, EAP_EMSK_LEN);
264 int eap_peer_tls_register(void)
266 struct eap_method *eap;
269 eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
270 EAP_VENDOR_IETF, EAP_TYPE_TLS, "TLS");
274 eap->init = eap_tls_init;
275 eap->deinit = eap_tls_deinit;
276 eap->process = eap_tls_process;
277 eap->isKeyAvailable = eap_tls_isKeyAvailable;
278 eap->getKey = eap_tls_getKey;
279 eap->get_status = eap_tls_get_status;
280 eap->has_reauth_data = eap_tls_has_reauth_data;
281 eap->deinit_for_reauth = eap_tls_deinit_for_reauth;
282 eap->init_for_reauth = eap_tls_init_for_reauth;
283 eap->get_emsk = eap_tls_get_emsk;
285 ret = eap_peer_method_register(eap);
287 eap_peer_method_free(eap);