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/*
* EAP peer method: EAP-OTP (RFC 3748)
* Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "includes.h"
#include "common.h"
#include "eap_i.h"
#include "config_ssid.h"
static void * eap_otp_init(struct eap_sm *sm)
{
/* No need for private data. However, must return non-NULL to indicate
* success. */
return (void *) 1;
}
static void eap_otp_deinit(struct eap_sm *sm, void *priv)
{
}
static u8 * eap_otp_process(struct eap_sm *sm, void *priv,
struct eap_method_ret *ret,
const u8 *reqData, size_t reqDataLen,
size_t *respDataLen)
{
const struct eap_hdr *req;
struct eap_hdr *resp;
const u8 *pos, *password;
u8 *rpos;
size_t password_len, len;
int otp;
pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_OTP,
reqData, reqDataLen, &len);
if (pos == NULL) {
ret->ignore = TRUE;
return NULL;
}
req = (const struct eap_hdr *) reqData;
wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-OTP: Request message",
pos, len);
password = eap_get_config_otp(sm, &password_len);
if (password)
otp = 1;
else {
password = eap_get_config_password(sm, &password_len);
otp = 0;
}
if (password == NULL) {
wpa_printf(MSG_INFO, "EAP-OTP: Password not configured");
eap_sm_request_otp(sm, (const char *) pos, len);
ret->ignore = TRUE;
return NULL;
}
ret->ignore = FALSE;
ret->methodState = METHOD_DONE;
ret->decision = DECISION_COND_SUCC;
ret->allowNotifications = FALSE;
resp = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_OTP, respDataLen,
password_len, EAP_CODE_RESPONSE, req->identifier,
&rpos);
if (resp == NULL)
return NULL;
os_memcpy(rpos, password, password_len);
wpa_hexdump_ascii_key(MSG_MSGDUMP, "EAP-OTP: Response",
password, password_len);
if (otp) {
wpa_printf(MSG_DEBUG, "EAP-OTP: Forgetting used password");
eap_clear_config_otp(sm);
}
return (u8 *) resp;
}
int eap_peer_otp_register(void)
{
struct eap_method *eap;
int ret;
eap = eap_peer_method_alloc(EAP_PEER_METHOD_INTERFACE_VERSION,
EAP_VENDOR_IETF, EAP_TYPE_OTP, "OTP");
if (eap == NULL)
return -1;
eap->init = eap_otp_init;
eap->deinit = eap_otp_deinit;
eap->process = eap_otp_process;
ret = eap_peer_method_register(eap);
if (ret)
eap_peer_method_free(eap);
return ret;
}