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components/wpa_supplicant/src/eap_server/eap_server_identity.c
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/*
* hostapd / EAP-Identity
* Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.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 = os_zalloc(sizeof(*data));
if (data == NULL)
return NULL;
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;
os_free(data);
}
static struct wpabuf * eap_identity_buildReq(struct eap_sm *sm, void *priv,
u8 id)
{
struct eap_identity_data *data = priv;
struct wpabuf *req;
const char *req_data;
size_t req_data_len;
if (sm->eapol_cb->get_eap_req_id_text) {
req_data = sm->eapol_cb->get_eap_req_id_text(sm->eapol_ctx,
&req_data_len);
} else {
req_data = NULL;
req_data_len = 0;
}
req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_IDENTITY, req_data_len,
EAP_CODE_REQUEST, id);
if (req == NULL) {
wpa_printf(MSG_ERROR, "EAP-Identity: Failed to allocate "
"memory for request");
data->state = FAILURE;
return NULL;
}
wpabuf_put_data(req, req_data, req_data_len);
return req;
}
static bool eap_identity_check(struct eap_sm *sm, void *priv,
struct wpabuf *respData)
{
const u8 *pos;
size_t len;
pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_IDENTITY,
respData, &len);
if (pos == NULL) {
wpa_printf(MSG_INFO, "EAP-Identity: Invalid frame");
return true;
}
return false;
}
static void eap_identity_process(struct eap_sm *sm, void *priv,
struct wpabuf *respData)
{
struct eap_identity_data *data = priv;
const u8 *pos;
size_t len;
char *buf;
if (data->pick_up) {
if (eap_identity_check(sm, data, respData)) {
wpa_printf(MSG_DEBUG, "EAP-Identity: failed to pick "
"up already started negotiation");
data->state = FAILURE;
return;
}
data->pick_up = 0;
}
pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_IDENTITY,
respData, &len);
if (pos == NULL)
return; /* Should not happen - frame already validated */
wpa_hexdump_ascii(MSG_DEBUG, "EAP-Identity: Peer identity", pos, len);
buf = os_malloc(len * 4 + 1);
if (buf) {
printf_encode(buf, len * 4 + 1, pos, len);
wpa_printf(MSG_DEBUG, "EAP-Response/Identity '%s'", buf);
os_free(buf);
}
if (sm->identity)
sm->update_user = true;
os_free(sm->identity);
sm->identity = os_malloc(len ? len : 1);
if (sm->identity == NULL) {
data->state = FAILURE;
} else {
os_memcpy(sm->identity, pos, len);
sm->identity_len = len;
data->state = SUCCESS;
}
}
static bool eap_identity_isDone(struct eap_sm *sm, void *priv)
{
struct eap_identity_data *data = priv;
return data->state != CONTINUE;
}
static bool eap_identity_isSuccess(struct eap_sm *sm, void *priv)
{
struct eap_identity_data *data = priv;
return data->state == SUCCESS;
}
int eap_server_identity_register(void)
{
struct eap_method *eap;
eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION,
EAP_VENDOR_IETF, EAP_TYPE_IDENTITY,
"Identity");
if (eap == NULL)
return -1;
eap->init = eap_identity_init;
eap->initPickUp = eap_identity_initPickUp;
eap->reset = eap_identity_reset;
eap->buildReq = eap_identity_buildReq;
eap->check = eap_identity_check;
eap->process = eap_identity_process;
eap->isDone = eap_identity_isDone;
eap->isSuccess = eap_identity_isSuccess;
return eap_server_method_register(eap);
}
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