179 lines
3.8 KiB
C
179 lines
3.8 KiB
C
![]() |
/*
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* hostapd / EAP-Identity
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* Copyright (c) 2004-2006, Jouni Malinen <j@w1.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 "includes.h"
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#include "common.h"
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#include "eap_i.h"
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struct eap_identity_data {
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enum { CONTINUE, SUCCESS, FAILURE } state;
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int pick_up;
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};
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static void * eap_identity_init(struct eap_sm *sm)
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{
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struct eap_identity_data *data;
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data = os_zalloc(sizeof(*data));
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if (data == NULL)
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return NULL;
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data->state = CONTINUE;
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return data;
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}
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static void * eap_identity_initPickUp(struct eap_sm *sm)
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{
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struct eap_identity_data *data;
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data = eap_identity_init(sm);
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if (data) {
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data->pick_up = 1;
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}
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return data;
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}
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static void eap_identity_reset(struct eap_sm *sm, void *priv)
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{
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struct eap_identity_data *data = priv;
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os_free(data);
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}
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static struct wpabuf * eap_identity_buildReq(struct eap_sm *sm, void *priv,
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u8 id)
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{
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struct eap_identity_data *data = priv;
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struct wpabuf *req;
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const char *req_data;
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size_t req_data_len;
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if (sm->eapol_cb->get_eap_req_id_text) {
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req_data = sm->eapol_cb->get_eap_req_id_text(sm->eapol_ctx,
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&req_data_len);
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} else {
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req_data = NULL;
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req_data_len = 0;
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}
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req = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_IDENTITY, req_data_len,
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EAP_CODE_REQUEST, id);
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if (req == NULL) {
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wpa_printf(MSG_ERROR, "EAP-Identity: Failed to allocate "
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"memory for request");
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data->state = FAILURE;
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return NULL;
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}
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wpabuf_put_data(req, req_data, req_data_len);
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return req;
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}
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static Boolean eap_identity_check(struct eap_sm *sm, void *priv,
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struct wpabuf *respData)
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{
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const u8 *pos;
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size_t len;
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pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_IDENTITY,
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respData, &len);
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if (pos == NULL) {
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wpa_printf(MSG_INFO, "EAP-Identity: Invalid frame");
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return TRUE;
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}
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return FALSE;
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}
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static void eap_identity_process(struct eap_sm *sm, void *priv,
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struct wpabuf *respData)
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{
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struct eap_identity_data *data = priv;
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const u8 *pos;
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size_t len;
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if (data->pick_up) {
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if (eap_identity_check(sm, data, respData)) {
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wpa_printf(MSG_DEBUG, "EAP-Identity: failed to pick "
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"up already started negotiation");
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data->state = FAILURE;
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return;
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}
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data->pick_up = 0;
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}
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pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_IDENTITY,
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respData, &len);
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if (pos == NULL)
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return; /* Should not happen - frame already validated */
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wpa_hexdump_ascii(MSG_DEBUG, "EAP-Identity: Peer identity", pos, len);
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os_free(sm->identity);
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sm->identity = os_malloc(len ? len : 1);
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if (sm->identity == NULL) {
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data->state = FAILURE;
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} else {
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os_memcpy(sm->identity, pos, len);
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sm->identity_len = len;
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data->state = SUCCESS;
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}
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}
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static Boolean eap_identity_isDone(struct eap_sm *sm, void *priv)
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{
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struct eap_identity_data *data = priv;
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return data->state != CONTINUE;
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}
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static Boolean eap_identity_isSuccess(struct eap_sm *sm, void *priv)
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{
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struct eap_identity_data *data = priv;
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return data->state == SUCCESS;
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}
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int eap_server_identity_register(void)
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{
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struct eap_method *eap;
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int ret;
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eap = eap_server_method_alloc(EAP_SERVER_METHOD_INTERFACE_VERSION,
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EAP_VENDOR_IETF, EAP_TYPE_IDENTITY,
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"Identity");
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if (eap == NULL)
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return -1;
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eap->init = eap_identity_init;
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eap->initPickUp = eap_identity_initPickUp;
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eap->reset = eap_identity_reset;
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eap->buildReq = eap_identity_buildReq;
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eap->check = eap_identity_check;
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eap->process = eap_identity_process;
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eap->isDone = eap_identity_isDone;
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eap->isSuccess = eap_identity_isSuccess;
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ret = eap_server_method_register(eap);
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if (ret)
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eap_server_method_free(eap);
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return ret;
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}
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