112 lines
2.6 KiB
C
112 lines
2.6 KiB
C
/*
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* WPA Supplicant / EAP-OTP (RFC 3748)
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* Copyright (c) 2004-2005, Jouni Malinen <jkmaline@cc.hut.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "common.h"
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#include "eap_i.h"
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#include "wpa_supplicant.h"
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#include "config_ssid.h"
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static void * eap_otp_init(struct eap_sm *sm)
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{
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return (void *) 1;
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}
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static void eap_otp_deinit(struct eap_sm *sm, void *priv)
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{
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}
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static u8 * eap_otp_process(struct eap_sm *sm, void *priv,
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struct eap_method_ret *ret,
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const u8 *reqData, size_t reqDataLen,
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size_t *respDataLen)
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{
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struct wpa_ssid *config = eap_get_config(sm);
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const struct eap_hdr *req;
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struct eap_hdr *resp;
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const u8 *pos, *password;
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u8 *rpos;
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size_t password_len, len;
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pos = eap_hdr_validate(EAP_TYPE_OTP, reqData, reqDataLen, &len);
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if (pos == NULL) {
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ret->ignore = TRUE;
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return NULL;
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}
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req = (const struct eap_hdr *) reqData;
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wpa_hexdump_ascii(MSG_MSGDUMP, "EAP-OTP: Request message",
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pos, len);
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if (config == NULL ||
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(config->password == NULL && config->otp == NULL)) {
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wpa_printf(MSG_INFO, "EAP-OTP: Password not configured");
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eap_sm_request_otp(sm, config, (const char *) pos, len);
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ret->ignore = TRUE;
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return NULL;
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}
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if (config->otp) {
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password = config->otp;
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password_len = config->otp_len;
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} else {
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password = config->password;
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password_len = config->password_len;
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}
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ret->ignore = FALSE;
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ret->methodState = METHOD_DONE;
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ret->decision = DECISION_COND_SUCC;
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ret->allowNotifications = FALSE;
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*respDataLen = sizeof(struct eap_hdr) + 1 + password_len;
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resp = malloc(*respDataLen);
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if (resp == NULL)
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return NULL;
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resp->code = EAP_CODE_RESPONSE;
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resp->identifier = req->identifier;
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resp->length = host_to_be16(*respDataLen);
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rpos = (u8 *) (resp + 1);
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*rpos++ = EAP_TYPE_OTP;
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memcpy(rpos, password, password_len);
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wpa_hexdump_ascii_key(MSG_MSGDUMP, "EAP-OTP: Response",
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password, password_len);
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if (config->otp) {
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wpa_printf(MSG_DEBUG, "EAP-OTP: Forgetting used password");
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memset(config->otp, 0, config->otp_len);
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free(config->otp);
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config->otp = NULL;
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config->otp_len = 0;
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}
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return (u8 *) resp;
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}
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const struct eap_method eap_method_otp =
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{
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.method = EAP_TYPE_OTP,
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.name = "OTP",
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.init = eap_otp_init,
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.deinit = eap_otp_deinit,
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.process = eap_otp_process,
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};
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