78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/*
|
|
*
|
|
* Wireless daemon for Linux
|
|
*
|
|
* Copyright (C) 2013-2014 Intel Corporation. All rights reserved.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <ell/ell.h>
|
|
|
|
#include "eapolutil.h"
|
|
|
|
const struct eapol_key *eapol_key_validate(const uint8_t *frame, size_t len)
|
|
{
|
|
const struct eapol_key *ek;
|
|
uint16_t key_data_len;
|
|
|
|
if (len < sizeof(struct eapol_key))
|
|
return NULL;
|
|
|
|
ek = (const struct eapol_key *) frame;
|
|
|
|
switch (ek->header.protocol_version) {
|
|
case EAPOL_PROTOCOL_VERSION_2001:
|
|
case EAPOL_PROTOCOL_VERSION_2004:
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
|
|
if (ek->header.packet_type != 3)
|
|
return NULL;
|
|
|
|
switch (ek->descriptor_type) {
|
|
case EAPOL_DESCRIPTOR_TYPE_RC4:
|
|
case EAPOL_DESCRIPTOR_TYPE_80211:
|
|
case EAPOL_DESCRIPTOR_TYPE_WPA:
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
|
|
switch (ek->key_descriptor_version) {
|
|
case EAPOL_KEY_DESCRIPTOR_VERSION_HMAC_MD5_ARC4:
|
|
case EAPOL_KEY_DESCRIPTOR_VERSION_HMAC_SHA1_AES:
|
|
case EAPOL_KEY_DESCRIPTOR_VERSION_AES_128_CMAC_AES:
|
|
case EAPOL_KEY_DESCRIPTOR_VERSION_AKM_DEFINED:
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
|
|
key_data_len = L_BE16_TO_CPU(ek->key_data_len);
|
|
if (len < sizeof(struct eapol_key) + key_data_len)
|
|
return NULL;
|
|
|
|
return ek;
|
|
}
|