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/*
* hostapd / EAP-Identity
* Copyright (c) 2004-2005, Jouni Malinen <jkmaline@cc.hut.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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <netinet/in.h>
#include "hostapd.h"
#include "common.h"
#include "eap_i.h"
struct eap_identity_data {
enum { CONTINUE, SUCCESS, FAILURE } state;
int pick_up;
};
static void * eap_identity_init(struct eap_sm *sm)
{
struct eap_identity_data *data;
data = malloc(sizeof(*data));
if (data == NULL)
return data;
memset(data, 0, sizeof(*data));
data->state = CONTINUE;
return data;
}
static void * eap_identity_initPickUp(struct eap_sm *sm)
{
struct eap_identity_data *data;
data = eap_identity_init(sm);
if (data) {
data->pick_up = 1;
}
return data;
}
static void eap_identity_reset(struct eap_sm *sm, void *priv)
{
struct eap_identity_data *data = priv;
free(data);
}
static u8 * eap_identity_buildReq(struct eap_sm *sm, void *priv, int id,
size_t *reqDataLen)
{
struct eap_identity_data *data = priv;
struct eap_hdr *req;
u8 *pos;
*reqDataLen = sizeof(*req) + 1;
req = malloc(*reqDataLen);
if (req == NULL) {
wpa_printf(MSG_ERROR, "EAP-Identity: Failed to allocate "
"memory for request");
data->state = FAILURE;
return NULL;
}
req->code = EAP_CODE_REQUEST;
req->identifier = id;
req->length = htons(*reqDataLen);
pos = (u8 *) (req + 1);
*pos = EAP_TYPE_IDENTITY;
return (u8 *) req;
}
static Boolean eap_identity_check(struct eap_sm *sm, void *priv,
u8 *respData, size_t respDataLen)
{
struct eap_hdr *resp;
u8 *pos;
size_t len;
resp = (struct eap_hdr *) respData;
pos = (u8 *) (resp + 1);
if (respDataLen < sizeof(*resp) + 1 || *pos != EAP_TYPE_IDENTITY ||
(len = ntohs(resp->length)) > respDataLen) {
wpa_printf(MSG_INFO, "EAP-Identity: Invalid frame");
return TRUE;
}
return FALSE;
}
static void eap_identity_process(struct eap_sm *sm, void *priv,
u8 *respData, size_t respDataLen)
{
struct eap_identity_data *data = priv;
struct eap_hdr *resp;
u8 *pos;
int len;
if (data->pick_up) {
if (eap_identity_check(sm, data, respData, respDataLen)) {
wpa_printf(MSG_DEBUG, "EAP-Identity: failed to pick "
"up already started negotiation");
data->state = FAILURE;
return;
}
data->pick_up = 0;
}
resp = (struct eap_hdr *) respData;
len = ntohs(resp->length);
pos = (u8 *) (resp + 1);
pos++;
len -= sizeof(*resp) + 1;
if (len < 0) {
data->state = FAILURE;
return;
}
wpa_hexdump_ascii(MSG_DEBUG, "EAP-Identity: Peer identity", pos, len);
free(sm->identity);
sm->identity = malloc(len);
if (sm->identity == NULL) {
data->state = FAILURE;
} else {
memcpy(sm->identity, pos, len);
sm->identity_len = len;
data->state = SUCCESS;
}
}
static Boolean eap_identity_isDone(struct eap_sm *sm, void *priv)
{
struct eap_identity_data *data = priv;
return data->state != CONTINUE;
}
static Boolean eap_identity_isSuccess(struct eap_sm *sm, void *priv)
{
struct eap_identity_data *data = priv;
return data->state == SUCCESS;
}
const struct eap_method eap_method_identity =
{
.method = EAP_TYPE_IDENTITY,
.name = "Identity",
.init = eap_identity_init,
.initPickUp = eap_identity_initPickUp,
.reset = eap_identity_reset,
.buildReq = eap_identity_buildReq,
.check = eap_identity_check,
.process = eap_identity_process,
.isDone = eap_identity_isDone,
.isSuccess = eap_identity_isSuccess,
};
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