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/*
* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*
* File: wpa.c
*
* Purpose: Handles the Basic Service Set & Node Database functions
*
* Functions:
* WPA_ParseRSN - Parse RSN IE.
*
* Revision History:
*
* Author: Kyle Hsu
*
* Date: July 14, 2003
*
*/
#include "ttype.h"
#include "tmacro.h"
#include "tether.h"
#include "device.h"
#include "80211hdr.h"
#include "bssdb.h"
#include "wmgr.h"
#include "wpa.h"
#include "80211mgr.h"
/*--------------------- Static Variables --------------------------*/
static const unsigned char abyOUI00[4] = { 0x00, 0x50, 0xf2, 0x00 };
static const unsigned char abyOUI01[4] = { 0x00, 0x50, 0xf2, 0x01 };
static const unsigned char abyOUI02[4] = { 0x00, 0x50, 0xf2, 0x02 };
static const unsigned char abyOUI03[4] = { 0x00, 0x50, 0xf2, 0x03 };
static const unsigned char abyOUI04[4] = { 0x00, 0x50, 0xf2, 0x04 };
static const unsigned char abyOUI05[4] = { 0x00, 0x50, 0xf2, 0x05 };
/*+
*
* Description:
* Clear RSN information in BSSList.
*
* Parameters:
* In:
* pBSSList - BSS list.
* Out:
* none
*
* Return Value: none.
*
-*/
void
WPA_ClearRSN(
PKnownBSS pBSSList
)
{
int ii;
pBSSList->byGKType = WPA_TKIP;
for (ii = 0; ii < 4; ii++)
pBSSList->abyPKType[ii] = WPA_TKIP;
pBSSList->wPKCount = 0;
for (ii = 0; ii < 4; ii++)
pBSSList->abyAuthType[ii] = WPA_AUTH_IEEE802_1X;
pBSSList->wAuthCount = 0;
pBSSList->byDefaultK_as_PK = 0;
pBSSList->byReplayIdx = 0;
pBSSList->sRSNCapObj.bRSNCapExist = false;
pBSSList->sRSNCapObj.wRSNCap = 0;
pBSSList->bWPAValid = false;
}
/*+
*
* Description:
* Parse RSN IE.
*
* Parameters:
* In:
* pBSSList - BSS list.
* pRSN - Pointer to the RSN IE.
* Out:
* none
*
* Return Value: none.
*
-*/
void
WPA_ParseRSN(
PKnownBSS pBSSList,
PWLAN_IE_RSN_EXT pRSN
)
{
PWLAN_IE_RSN_AUTH pIE_RSN_Auth = NULL;
int i, j, m, n = 0;
unsigned char *pbyCaps;
WPA_ClearRSN(pBSSList);
pr_debug("WPA_ParseRSN: [%d]\n", pRSN->len);
// information element header makes sense
if ((pRSN->len >= 6) // oui1(4)+ver(2)
&& (pRSN->byElementID == WLAN_EID_RSN_WPA) && !memcmp(pRSN->abyOUI, abyOUI01, 4)
&& (pRSN->wVersion == 1)) {
pr_debug("Legal RSN\n");
// update each variable if pRSN is long enough to contain the variable
if (pRSN->len >= 10) {
//OUI1(4)+ver(2)+GKSuite(4)
if (!memcmp(pRSN->abyMulticast, abyOUI01, 4))
pBSSList->byGKType = WPA_WEP40;
else if (!memcmp(pRSN->abyMulticast, abyOUI02, 4))
pBSSList->byGKType = WPA_TKIP;
else if (!memcmp(pRSN->abyMulticast, abyOUI03, 4))
pBSSList->byGKType = WPA_AESWRAP;
else if (!memcmp(pRSN->abyMulticast, abyOUI04, 4))
pBSSList->byGKType = WPA_AESCCMP;
else if (!memcmp(pRSN->abyMulticast, abyOUI05, 4))
pBSSList->byGKType = WPA_WEP104;
else
// any vendor checks here
pBSSList->byGKType = WPA_NONE;
pr_debug("byGKType: %x\n", pBSSList->byGKType);
}
if (pRSN->len >= 12) {
//oui1(4)+ver(2)+GKS(4)+PKSCnt(2)
j = 0;
pr_debug("wPKCount: %d, sizeof(pBSSList->abyPKType): %zu\n",
pRSN->wPKCount, sizeof(pBSSList->abyPKType));
for (i = 0; (i < pRSN->wPKCount) && (j < ARRAY_SIZE(pBSSList->abyPKType)); i++) {
if (pRSN->len >= 12+i*4+4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*i)
if (!memcmp(pRSN->PKSList[i].abyOUI, abyOUI00, 4))
pBSSList->abyPKType[j++] = WPA_NONE;
else if (!memcmp(pRSN->PKSList[i].abyOUI, abyOUI02, 4))
pBSSList->abyPKType[j++] = WPA_TKIP;
else if (!memcmp(pRSN->PKSList[i].abyOUI, abyOUI03, 4))
pBSSList->abyPKType[j++] = WPA_AESWRAP;
else if (!memcmp(pRSN->PKSList[i].abyOUI, abyOUI04, 4))
pBSSList->abyPKType[j++] = WPA_AESCCMP;
else
// any vendor checks here
;
} else
break;
}
pBSSList->wPKCount = (unsigned short)j;
pr_debug("wPKCount: %d\n", pBSSList->wPKCount);
}
m = pRSN->wPKCount;
pr_debug("m: %d\n", m);
pr_debug("14+m*4: %d\n", 14+m*4);
if (pRSN->len >= 14+m*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)
// overlay IE_RSN_Auth structure into correct place
pIE_RSN_Auth = (PWLAN_IE_RSN_AUTH) pRSN->PKSList[m].abyOUI;
j = 0;
pr_debug("wAuthCount: %d, sizeof(pBSSList->abyAuthType): %zu\n",
pIE_RSN_Auth->wAuthCount,
sizeof(pBSSList->abyAuthType));
for (i = 0; (i < pIE_RSN_Auth->wAuthCount) && (j < ARRAY_SIZE(pBSSList->abyAuthType)); i++) {
if (pRSN->len >= 14+4+(m+i)*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)+AKS(4*i)
if (!memcmp(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI01, 4))
pBSSList->abyAuthType[j++] = WPA_AUTH_IEEE802_1X;
else if (!memcmp(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI02, 4))
pBSSList->abyAuthType[j++] = WPA_AUTH_PSK;
else
// any vendor checks here
;
} else
break;
}
if (j > 0)
pBSSList->wAuthCount = (unsigned short)j;
pr_debug("wAuthCount: %d\n", pBSSList->wAuthCount);
}
if (pIE_RSN_Auth != NULL) {
n = pIE_RSN_Auth->wAuthCount;
pr_debug("n: %d\n", n);
pr_debug("14+4+(m+n)*4: %d\n", 14+4+(m+n)*4);
if (pRSN->len+2 >= 14+4+(m+n)*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)+AKS(4*n)+Cap(2)
pbyCaps = (unsigned char *)pIE_RSN_Auth->AuthKSList[n].abyOUI;
pBSSList->byDefaultK_as_PK = (*pbyCaps) & WPA_GROUPFLAG;
pBSSList->byReplayIdx = 2 << ((*pbyCaps >> WPA_REPLAYBITSSHIFT) & WPA_REPLAYBITS);
pBSSList->sRSNCapObj.bRSNCapExist = true;
pBSSList->sRSNCapObj.wRSNCap = *(unsigned short *)pbyCaps;
}
}
pBSSList->bWPAValid = true;
}
}
/*+
*
* Description:
* Search RSN information in BSSList.
*
* Parameters:
* In:
* byCmd - Search type
* byEncrypt- Encrypt Type
* pBSSList - BSS list
* Out:
* none
*
* Return Value: none.
*
-*/
bool
WPA_SearchRSN(
unsigned char byCmd,
unsigned char byEncrypt,
PKnownBSS pBSSList
)
{
int ii;
unsigned char byPKType = WPA_NONE;
if (!pBSSList->bWPAValid)
return false;
switch (byCmd) {
case 0:
if (byEncrypt != pBSSList->byGKType)
return false;
if (pBSSList->wPKCount > 0) {
for (ii = 0; ii < pBSSList->wPKCount; ii++) {
if (pBSSList->abyPKType[ii] == WPA_AESCCMP)
byPKType = WPA_AESCCMP;
else if ((pBSSList->abyPKType[ii] == WPA_TKIP) && (byPKType != WPA_AESCCMP))
byPKType = WPA_TKIP;
else if ((pBSSList->abyPKType[ii] == WPA_WEP40) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP))
byPKType = WPA_WEP40;
else if ((pBSSList->abyPKType[ii] == WPA_WEP104) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP))
byPKType = WPA_WEP104;
}
if (byEncrypt != byPKType)
return false;
}
return true;
default:
break;
}
return false;
}
/*+
*
* Description:
* Check if RSN IE makes sense.
*
* Parameters:
* In:
* pRSN - Pointer to the RSN IE.
* Out:
* none
*
* Return Value: none.
*
-*/
bool
WPAb_Is_RSN(
PWLAN_IE_RSN_EXT pRSN
)
{
if (pRSN == NULL)
return false;
if ((pRSN->len >= 6) && // oui1(4)+ver(2)
(pRSN->byElementID == WLAN_EID_RSN_WPA) && !memcmp(pRSN->abyOUI, abyOUI01, 4) &&
(pRSN->wVersion == 1)) {
return true;
} else
return false;
}
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