LXR linux/drivers/staging/vt6656/wpa.c

   1/*
   2 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   3 * All rights reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License as published by
   7 * the Free Software Foundation; either version 2 of the License, or
   8 * (at your option) any later version.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License along
  16 * with this program; if not, write to the Free Software Foundation, Inc.,
  17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 *
  19 *
  20 * File: wpa.c
  21 *
  22 * Purpose: Handles the Basic Service Set & Node Database functions
  23 *
  24 * Functions:
  25 *      WPA_ParseRSN - Parse RSN IE.
  26 *
  27 * Revision History:
  28 *
  29 * Author: Kyle Hsu
  30 *
  31 * Date: July 14, 2003
  32 *
  33 */
  34
  35#include "tmacro.h"
  36#include "tether.h"
  37#include "device.h"
  38#include "80211hdr.h"
  39#include "bssdb.h"
  40#include "wmgr.h"
  41#include "wpa.h"
  42#include "80211mgr.h"
  43
  44static int          msglevel                =MSG_LEVEL_INFO;
  45
  46static const u8 abyOUI00[4] = { 0x00, 0x50, 0xf2, 0x00 };
  47static const u8 abyOUI01[4] = { 0x00, 0x50, 0xf2, 0x01 };
  48static const u8 abyOUI02[4] = { 0x00, 0x50, 0xf2, 0x02 };
  49static const u8 abyOUI03[4] = { 0x00, 0x50, 0xf2, 0x03 };
  50static const u8 abyOUI04[4] = { 0x00, 0x50, 0xf2, 0x04 };
  51static const u8 abyOUI05[4] = { 0x00, 0x50, 0xf2, 0x05 };
  52
  53/*+
  54 *
  55 * Description:
  56 *    Clear RSN information in BSSList.
  57 *
  58 * Parameters:
  59 *  In:
  60 *      pBSSList - BSS list.
  61 *  Out:
  62 *      none
  63 *
  64 * Return Value: none.
  65 *
  66-*/
  67
  68void
  69WPA_ClearRSN(
  70     PKnownBSS        pBSSList
  71    )
  72{
  73    int ii;
  74    pBSSList->byGKType = WPA_TKIP;
  75    for (ii=0; ii < 4; ii ++)
  76        pBSSList->abyPKType[ii] = WPA_TKIP;
  77    pBSSList->wPKCount = 0;
  78    for (ii=0; ii < 4; ii ++)
  79        pBSSList->abyAuthType[ii] = WPA_AUTH_IEEE802_1X;
  80    pBSSList->wAuthCount = 0;
  81    pBSSList->byDefaultK_as_PK = 0;
  82    pBSSList->byReplayIdx = 0;
  83    pBSSList->sRSNCapObj.bRSNCapExist = false;
  84    pBSSList->sRSNCapObj.wRSNCap = 0;
  85    pBSSList->bWPAValid = false;
  86}
  87
  88/*+
  89 *
  90 * Description:
  91 *    Parse RSN IE.
  92 *
  93 * Parameters:
  94 *  In:
  95 *      pBSSList - BSS list.
  96 *      pRSN - Pointer to the RSN IE.
  97 *  Out:
  98 *      none
  99 *
 100 * Return Value: none.
 101 *
 102-*/
 103void
 104WPA_ParseRSN(
 105     PKnownBSS        pBSSList,
 106     PWLAN_IE_RSN_EXT pRSN
 107    )
 108{
 109    PWLAN_IE_RSN_AUTH  pIE_RSN_Auth = NULL;
 110    int                i, j, m, n = 0;
 111    u8 *              pbyCaps;
 112
 113    WPA_ClearRSN(pBSSList);
 114
 115    DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"WPA_ParseRSN: [%d]\n", pRSN->len);
 116
 117    // information element header makes sense
 118    if ((pRSN->len >= 6) // oui1(4)+ver(2)
 119         && (pRSN->byElementID == WLAN_EID_RSN_WPA) &&  !memcmp(pRSN->abyOUI, abyOUI01, 4)
 120         && (pRSN->wVersion == 1)) {
 121
 122        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Legal RSN\n");
 123        // update each variable if pRSN is long enough to contain the variable
 124        if (pRSN->len >= 10) //oui1(4)+ver(2)+GKSuite(4)
 125        {
 126            if ( !memcmp(pRSN->abyMulticast, abyOUI01, 4))
 127                pBSSList->byGKType = WPA_WEP40;
 128            else if ( !memcmp(pRSN->abyMulticast, abyOUI02, 4))
 129                pBSSList->byGKType = WPA_TKIP;
 130            else if ( !memcmp(pRSN->abyMulticast, abyOUI03, 4))
 131                pBSSList->byGKType = WPA_AESWRAP;
 132            else if ( !memcmp(pRSN->abyMulticast, abyOUI04, 4))
 133                pBSSList->byGKType = WPA_AESCCMP;
 134            else if ( !memcmp(pRSN->abyMulticast, abyOUI05, 4))
 135                pBSSList->byGKType = WPA_WEP104;
 136            else
 137                // any vendor checks here
 138                pBSSList->byGKType = WPA_NONE;
 139
 140            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"byGKType: %x\n", pBSSList->byGKType);
 141        }
 142
 143        if (pRSN->len >= 12) //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)
 144        {
 145            j = 0;
 146            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wPKCount: %d, sizeof(pBSSList->abyPKType): %zu\n", pRSN->wPKCount, sizeof(pBSSList->abyPKType));
 147            for (i = 0; (i < pRSN->wPKCount) &&
 148                   (j < ARRAY_SIZE(pBSSList->abyPKType)); i++) {
 149                if(pRSN->len >= 12+i*4+4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*i)
 150                    if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI00, 4))
 151                        pBSSList->abyPKType[j++] = WPA_NONE;
 152                    else if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI02, 4))
 153                        pBSSList->abyPKType[j++] = WPA_TKIP;
 154                    else if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI03, 4))
 155                        pBSSList->abyPKType[j++] = WPA_AESWRAP;
 156                    else if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI04, 4))
 157                        pBSSList->abyPKType[j++] = WPA_AESCCMP;
 158                    else
 159                        // any vendor checks here
 160                        ;
 161                }
 162                else
 163                    break;
 164                //DBG_PRN_GRP14(("abyPKType[%d]: %X\n", j-1, pBSSList->abyPKType[j-1]));
 165            } //for
 166            pBSSList->wPKCount = (u16)j;
 167            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wPKCount: %d\n", pBSSList->wPKCount);
 168        }
 169
 170        m = pRSN->wPKCount;
 171        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"m: %d\n", m);
 172        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"14+m*4: %d\n", 14+m*4);
 173
 174        if (pRSN->len >= 14+m*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)
 175            // overlay IE_RSN_Auth structure into correct place
 176            pIE_RSN_Auth = (PWLAN_IE_RSN_AUTH) pRSN->PKSList[m].abyOUI;
 177            j = 0;
 178            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAuthCount: %d, sizeof(pBSSList->abyAuthType): %zu\n",
 179                          pIE_RSN_Auth->wAuthCount, sizeof(pBSSList->abyAuthType));
 180            for (i = 0; (i < pIE_RSN_Auth->wAuthCount) &&
 181                   (j < ARRAY_SIZE(pBSSList->abyAuthType)); i++) {
 182                if(pRSN->len >= 14+4+(m+i)*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)+AKS(4*i)
 183                    if ( !memcmp(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI01, 4))
 184                        pBSSList->abyAuthType[j++] = WPA_AUTH_IEEE802_1X;
 185                    else if ( !memcmp(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI02, 4))
 186                        pBSSList->abyAuthType[j++] = WPA_AUTH_PSK;
 187                    else
 188                    // any vendor checks here
 189                    ;
 190                }
 191                else
 192                    break;
 193                //DBG_PRN_GRP14(("abyAuthType[%d]: %X\n", j-1, pBSSList->abyAuthType[j-1]));
 194            }
 195            if(j > 0)
 196                pBSSList->wAuthCount = (u16)j;
 197            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAuthCount: %d\n", pBSSList->wAuthCount);
 198        }
 199
 200        if (pIE_RSN_Auth != NULL) {
 201
 202            n = pIE_RSN_Auth->wAuthCount;
 203
 204            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"n: %d\n", n);
 205            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"14+4+(m+n)*4: %d\n", 14+4+(m+n)*4);
 206
 207            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)
 208                pbyCaps = (u8 *)pIE_RSN_Auth->AuthKSList[n].abyOUI;
 209                pBSSList->byDefaultK_as_PK = (*pbyCaps) & WPA_GROUPFLAG;
 210                pBSSList->byReplayIdx = 2 << ((*pbyCaps >> WPA_REPLAYBITSSHIFT) & WPA_REPLAYBITS);
 211                pBSSList->sRSNCapObj.bRSNCapExist = true;
 212                pBSSList->sRSNCapObj.wRSNCap = *(u16 *)pbyCaps;
 213                //DBG_PRN_GRP14(("pbyCaps: %X\n", *pbyCaps));
 214                //DBG_PRN_GRP14(("byDefaultK_as_PK: %X\n", pBSSList->byDefaultK_as_PK));
 215                //DBG_PRN_GRP14(("byReplayIdx: %X\n", pBSSList->byReplayIdx));
 216            }
 217        }
 218        pBSSList->bWPAValid = true;
 219    }
 220}
 221
 222/*+
 223 *
 224 * Description:
 225 *    Search RSN information in BSSList.
 226 *
 227 * Parameters:
 228 *  In:
 229 *      byCmd    - Search type
 230 *      byEncrypt- Encrypt Type
 231 *      pBSSList - BSS list
 232 *  Out:
 233 *      none
 234 *
 235 * Return Value: none.
 236 *
 237-*/
 238bool
 239WPA_SearchRSN(
 240    u8                byCmd,
 241    u8                byEncrypt,
 242     PKnownBSS        pBSSList
 243    )
 244{
 245    int ii;
 246    u8 byPKType = WPA_NONE;
 247
 248    if (pBSSList->bWPAValid == false)
 249        return false;
 250
 251    switch(byCmd) {
 252    case 0:
 253
 254        if (byEncrypt != pBSSList->byGKType)
 255            return false;
 256
 257        if (pBSSList->wPKCount > 0) {
 258            for (ii = 0; ii < pBSSList->wPKCount; ii ++) {
 259                if (pBSSList->abyPKType[ii] == WPA_AESCCMP)
 260                    byPKType = WPA_AESCCMP;
 261                else if ((pBSSList->abyPKType[ii] == WPA_TKIP) && (byPKType != WPA_AESCCMP))
 262                     byPKType = WPA_TKIP;
 263                else if ((pBSSList->abyPKType[ii] == WPA_WEP40) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP))
 264                     byPKType = WPA_WEP40;
 265                else if ((pBSSList->abyPKType[ii] == WPA_WEP104) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP))
 266                     byPKType = WPA_WEP104;
 267            }
 268            if (byEncrypt != byPKType)
 269                return false;
 270        }
 271        return true;
 272//        if (pBSSList->wAuthCount > 0)
 273//            for (ii=0; ii < pBSSList->wAuthCount; ii ++)
 274//                if (byAuth == pBSSList->abyAuthType[ii])
 275//                    break;
 276        break;
 277
 278    default:
 279        break;
 280    }
 281    return false;
 282}
 283
 284/*+
 285 *
 286 * Description:
 287 *    Check if RSN IE makes sense.
 288 *
 289 * Parameters:
 290 *  In:
 291 *      pRSN - Pointer to the RSN IE.
 292 *  Out:
 293 *      none
 294 *
 295 * Return Value: none.
 296 *
 297-*/
 298bool
 299WPAb_Is_RSN(
 300     PWLAN_IE_RSN_EXT pRSN
 301    )
 302{
 303    if (pRSN == NULL)
 304        return false;
 305
 306    if ((pRSN->len >= 6) && // oui1(4)+ver(2)
 307        (pRSN->byElementID == WLAN_EID_RSN_WPA) &&  !memcmp(pRSN->abyOUI, abyOUI01, 4) &&
 308        (pRSN->wVersion == 1)) {
 309        return true;
 310    }
 311    else
 312        return false;
 313}
 314
 315