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
  44 static int          msglevel                =MSG_LEVEL_INFO;
  45
  46 const u8 abyOUI00[4] = { 0x00, 0x50, 0xf2, 0x00 };
  47 const u8 abyOUI01[4] = { 0x00, 0x50, 0xf2, 0x01 };
  48 const u8 abyOUI02[4] = { 0x00, 0x50, 0xf2, 0x02 };
  49 const u8 abyOUI03[4] = { 0x00, 0x50, 0xf2, 0x03 };
  50 const u8 abyOUI04[4] = { 0x00, 0x50, 0xf2, 0x04 };
  51 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
  68 void
  69 WPA_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 -*/
 103 void
 104 WPA_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 -*/
 238 bool
 239 WPA_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 -*/
 298 bool
 299 WPAb_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