2 * hostapd / EAP-GTC (RFC 3748)
3 * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
16 enum { CONTINUE, SUCCESS, FAILURE } state;
21 static void * eap_gtc_init(struct eap_sm *sm)
23 struct eap_gtc_data *data;
25 data = os_zalloc(sizeof(*data));
28 data->state = CONTINUE;
30 #ifdef EAP_SERVER_FAST
31 if (sm->m && sm->m->vendor == EAP_VENDOR_IETF &&
32 sm->m->method == EAP_TYPE_FAST) {
33 wpa_printf(MSG_DEBUG, "EAP-GTC: EAP-FAST tunnel - use prefix "
34 "with challenge/response");
37 #endif /* EAP_SERVER_FAST */
43 static void eap_gtc_reset(struct eap_sm *sm, void *priv)
45 struct eap_gtc_data *data = priv;
50 static struct wpabuf * eap_gtc_buildReq(struct eap_sm *sm, void *priv, u8 id)
52 struct eap_gtc_data *data = priv;
57 msg = data->prefix ? "CHALLENGE=Password" : "Password";
59 msg_len = os_strlen(msg);
60 req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_GTC, msg_len,
61 EAP_CODE_REQUEST, id);
63 wpa_printf(MSG_ERROR, "EAP-GTC: Failed to allocate memory for "
65 data->state = FAILURE;
69 wpabuf_put_data(req, msg, msg_len);
71 data->state = CONTINUE;
77 static Boolean eap_gtc_check(struct eap_sm *sm, void *priv,
78 struct wpabuf *respData)
83 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_GTC, respData, &len);
84 if (pos == NULL || len < 1) {
85 wpa_printf(MSG_INFO, "EAP-GTC: Invalid frame");
93 static void eap_gtc_process(struct eap_sm *sm, void *priv,
94 struct wpabuf *respData)
96 struct eap_gtc_data *data = priv;
100 pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_GTC, respData, &rlen);
101 if (pos == NULL || rlen < 1)
102 return; /* Should not happen - frame already validated */
104 wpa_hexdump_ascii_key(MSG_MSGDUMP, "EAP-GTC: Response", pos, rlen);
106 #ifdef EAP_SERVER_FAST
108 const u8 *pos2, *end;
109 /* "RESPONSE=<user>\0<password>" */
111 wpa_printf(MSG_DEBUG, "EAP-GTC: Too short response "
112 "for EAP-FAST prefix");
113 data->state = FAILURE;
120 while (pos2 < end && *pos2)
123 wpa_printf(MSG_DEBUG, "EAP-GTC: No password in "
124 "response to EAP-FAST prefix");
125 data->state = FAILURE;
129 wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-GTC: Response user",
131 if (sm->identity && sm->require_identity_match &&
132 (pos2 - pos != (int) sm->identity_len ||
133 os_memcmp(pos, sm->identity, sm->identity_len))) {
134 wpa_printf(MSG_DEBUG, "EAP-GTC: Phase 2 Identity did "
135 "not match with required Identity");
136 wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-GTC: Expected "
138 sm->identity, sm->identity_len);
139 data->state = FAILURE;
142 os_free(sm->identity);
143 sm->identity_len = pos2 - pos;
144 sm->identity = os_memdup(pos, sm->identity_len);
145 if (sm->identity == NULL) {
146 data->state = FAILURE;
151 if (eap_user_get(sm, sm->identity, sm->identity_len, 1) != 0) {
152 wpa_hexdump_ascii(MSG_DEBUG, "EAP-GTC: Phase2 "
153 "Identity not found in the user "
155 sm->identity, sm->identity_len);
156 data->state = FAILURE;
162 wpa_hexdump_ascii_key(MSG_MSGDUMP,
163 "EAP-GTC: Response password",
166 #endif /* EAP_SERVER_FAST */
168 if (sm->user == NULL || sm->user->password == NULL ||
169 sm->user->password_hash) {
170 wpa_printf(MSG_INFO, "EAP-GTC: Plaintext password not "
172 data->state = FAILURE;
176 if (rlen != sm->user->password_len ||
177 os_memcmp_const(pos, sm->user->password, rlen) != 0) {
178 wpa_printf(MSG_DEBUG, "EAP-GTC: Done - Failure");
179 data->state = FAILURE;
181 wpa_printf(MSG_DEBUG, "EAP-GTC: Done - Success");
182 data->state = SUCCESS;
187 static Boolean eap_gtc_isDone(struct eap_sm *sm, void *priv)
189 struct eap_gtc_data *data = priv;
190 return data->state != CONTINUE;
194 static Boolean eap_gtc_isSuccess(struct eap_sm *sm, void *priv)
196 struct eap_gtc_data *data = priv;
197 return data->state == SUCCESS;
201 int eap_server_gtc_register(void)
203 struct eap_method *eap;
205 eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION,
206 EAP_VENDOR_IETF, EAP_TYPE_GTC, "GTC");
210 eap->init = eap_gtc_init;
211 eap->reset = eap_gtc_reset;
212 eap->buildReq = eap_gtc_buildReq;
213 eap->check = eap_gtc_check;
214 eap->process = eap_gtc_process;
215 eap->isDone = eap_gtc_isDone;
216 eap->isSuccess = eap_gtc_isSuccess;
218 return eap_server_method_register(eap);