drivers/staging/vt6655/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 "ttype.h"
  36 #include "tmacro.h"
  37 #include "tether.h"
  38 #include "device.h"
  39 #include "80211hdr.h"
  40 #include "bssdb.h"
  41 #include "wmgr.h"
  42 #include "wpa.h"
  43 #include "80211mgr.h"
  44
  45 /*---------------------  Static Variables  --------------------------*/
  46 static int          msglevel                =MSG_LEVEL_INFO;
  47
  48 const unsigned char abyOUI00[4] = { 0x00, 0x50, 0xf2, 0x00 };
  49 const unsigned char abyOUI01[4] = { 0x00, 0x50, 0xf2, 0x01 };
  50 const unsigned char abyOUI02[4] = { 0x00, 0x50, 0xf2, 0x02 };
  51 const unsigned char abyOUI03[4] = { 0x00, 0x50, 0xf2, 0x03 };
  52 const unsigned char abyOUI04[4] = { 0x00, 0x50, 0xf2, 0x04 };
  53 const unsigned char abyOUI05[4] = { 0x00, 0x50, 0xf2, 0x05 };
  54
  55
  56 /*+
  57  *
  58  * Description:
  59  *    Clear RSN information in BSSList.
  60  *
  61  * Parameters:
  62  *  In:
  63  *      pBSSList - BSS list.
  64  *  Out:
  65  *      none
  66  *
  67  * Return Value: none.
  68  *
  69 -*/
  70
  71 void
  72 WPA_ClearRSN (
  73     PKnownBSS        pBSSList
  74     )
  75 {
  76     int ii;
  77     pBSSList->byGKType = WPA_TKIP;
  78     for (ii=0; ii < 4; ii ++)
  79         pBSSList->abyPKType[ii] = WPA_TKIP;
  80     pBSSList->wPKCount = 0;
  81     for (ii=0; ii < 4; ii ++)
  82         pBSSList->abyAuthType[ii] = WPA_AUTH_IEEE802_1X;
  83     pBSSList->wAuthCount = 0;
  84     pBSSList->byDefaultK_as_PK = 0;
  85     pBSSList->byReplayIdx = 0;
  86     pBSSList->sRSNCapObj.bRSNCapExist = false;
  87     pBSSList->sRSNCapObj.wRSNCap = 0;
  88     pBSSList->bWPAValid = false;
  89 }
  90
  91
  92 /*+
  93  *
  94  * Description:
  95  *    Parse RSN IE.
  96  *
  97  * Parameters:
  98  *  In:
  99  *      pBSSList - BSS list.
 100  *      pRSN - Pointer to the RSN IE.
 101  *  Out:
 102  *      none
 103  *
 104  * Return Value: none.
 105  *
 106 -*/
 107 void
 108 WPA_ParseRSN (
 109     PKnownBSS        pBSSList,
 110     PWLAN_IE_RSN_EXT pRSN
 111     )
 112 {
 113     PWLAN_IE_RSN_AUTH  pIE_RSN_Auth = NULL;
 114     int                i, j, m, n = 0;
 115     unsigned char *pbyCaps;
 116
 117     WPA_ClearRSN(pBSSList);
 118
 119     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"WPA_ParseRSN: [%d]\n", pRSN->len);
 120
 121     // information element header makes sense
 122     if ((pRSN->len >= 6) // oui1(4)+ver(2)
 123          && (pRSN->byElementID == WLAN_EID_RSN_WPA) &&  !memcmp(pRSN->abyOUI, abyOUI01, 4)
 124          && (pRSN->wVersion == 1)) {
 125
 126         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Legal RSN\n");
 127         // update each variable if pRSN is long enough to contain the variable
 128         if (pRSN->len >= 10) //oui1(4)+ver(2)+GKSuite(4)
 129         {
 130             if ( !memcmp(pRSN->abyMulticast, abyOUI01, 4))
 131                 pBSSList->byGKType = WPA_WEP40;
 132             else if ( !memcmp(pRSN->abyMulticast, abyOUI02, 4))
 133                 pBSSList->byGKType = WPA_TKIP;
 134             else if ( !memcmp(pRSN->abyMulticast, abyOUI03, 4))
 135                 pBSSList->byGKType = WPA_AESWRAP;
 136             else if ( !memcmp(pRSN->abyMulticast, abyOUI04, 4))
 137                 pBSSList->byGKType = WPA_AESCCMP;
 138             else if ( !memcmp(pRSN->abyMulticast, abyOUI05, 4))
 139                 pBSSList->byGKType = WPA_WEP104;
 140             else
 141                 // any vendor checks here
 142                 pBSSList->byGKType = WPA_NONE;
 143
 144             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"byGKType: %x\n", pBSSList->byGKType);
 145         }
 146
 147         if (pRSN->len >= 12) //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)
 148         {
 149             j = 0;
 150             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wPKCount: %d, sizeof(pBSSList->abyPKType): %zu\n", pRSN->wPKCount, sizeof(pBSSList->abyPKType));
 151             for(i = 0; (i < pRSN->wPKCount) && (j < sizeof(pBSSList->abyPKType)/sizeof(unsigned char)); i++) {
 152                 if(pRSN->len >= 12+i*4+4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*i)
 153                     if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI00, 4))
 154                         pBSSList->abyPKType[j++] = WPA_NONE;
 155                     else if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI02, 4))
 156                         pBSSList->abyPKType[j++] = WPA_TKIP;
 157                     else if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI03, 4))
 158                         pBSSList->abyPKType[j++] = WPA_AESWRAP;
 159                     else if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI04, 4))
 160                         pBSSList->abyPKType[j++] = WPA_AESCCMP;
 161                     else
 162                         // any vendor checks here
 163                         ;
 164                 }
 165                 else
 166                     break;
 167                 //DBG_PRN_GRP14(("abyPKType[%d]: %X\n", j-1, pBSSList->abyPKType[j-1]));
 168             } //for
 169             pBSSList->wPKCount = (unsigned short)j;
 170             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wPKCount: %d\n", pBSSList->wPKCount);
 171         }
 172
 173         m = pRSN->wPKCount;
 174         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"m: %d\n", m);
 175         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"14+m*4: %d\n", 14+m*4);
 176
 177         if (pRSN->len >= 14+m*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)
 178             // overlay IE_RSN_Auth structure into correct place
 179             pIE_RSN_Auth = (PWLAN_IE_RSN_AUTH) pRSN->PKSList[m].abyOUI;
 180             j = 0;
 181             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAuthCount: %d, sizeof(pBSSList->abyAuthType): %zu\n",
 182                           pIE_RSN_Auth->wAuthCount, sizeof(pBSSList->abyAuthType));
 183             for(i = 0; (i < pIE_RSN_Auth->wAuthCount) && (j < sizeof(pBSSList->abyAuthType)/sizeof(unsigned char)); i++) {
 184                 if(pRSN->len >= 14+4+(m+i)*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)+AKS(4*i)
 185                     if ( !memcmp(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI01, 4))
 186                         pBSSList->abyAuthType[j++] = WPA_AUTH_IEEE802_1X;
 187                     else if ( !memcmp(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI02, 4))
 188                         pBSSList->abyAuthType[j++] = WPA_AUTH_PSK;
 189                     else
 190                     // any vendor checks here
 191                     ;
 192                 }
 193                 else
 194                     break;
 195                 //DBG_PRN_GRP14(("abyAuthType[%d]: %X\n", j-1, pBSSList->abyAuthType[j-1]));
 196             }
 197             if(j > 0)
 198                 pBSSList->wAuthCount = (unsigned short)j;
 199             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAuthCount: %d\n", pBSSList->wAuthCount);
 200         }
 201
 202         if (pIE_RSN_Auth != NULL) {
 203
 204             n = pIE_RSN_Auth->wAuthCount;
 205
 206             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"n: %d\n", n);
 207             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"14+4+(m+n)*4: %d\n", 14+4+(m+n)*4);
 208
 209             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)
 210                 pbyCaps = (unsigned char *)pIE_RSN_Auth->AuthKSList[n].abyOUI;
 211                 pBSSList->byDefaultK_as_PK = (*pbyCaps) & WPA_GROUPFLAG;
 212                 pBSSList->byReplayIdx = 2 << ((*pbyCaps >> WPA_REPLAYBITSSHIFT) & WPA_REPLAYBITS);
 213                 pBSSList->sRSNCapObj.bRSNCapExist = true;
 214                 pBSSList->sRSNCapObj.wRSNCap = *(unsigned short *)pbyCaps;
 215                 //DBG_PRN_GRP14(("pbyCaps: %X\n", *pbyCaps));
 216                 //DBG_PRN_GRP14(("byDefaultK_as_PK: %X\n", pBSSList->byDefaultK_as_PK));
 217                 //DBG_PRN_GRP14(("byReplayIdx: %X\n", pBSSList->byReplayIdx));
 218             }
 219         }
 220         pBSSList->bWPAValid = true;
 221     }
 222 }
 223
 224 /*+
 225  *
 226  * Description:
 227  *    Search RSN information in BSSList.
 228  *
 229  * Parameters:
 230  *  In:
 231  *      byCmd    - Search type
 232  *      byEncrypt- Encrcypt Type
 233  *      pBSSList - BSS list
 234  *  Out:
 235  *      none
 236  *
 237  * Return Value: none.
 238  *
 239 -*/
 240 bool
 241 WPA_SearchRSN (
 242     unsigned char byCmd,
 243     unsigned char byEncrypt,
 244     PKnownBSS        pBSSList
 245     )
 246 {
 247     int ii;
 248     unsigned char byPKType = WPA_NONE;
 249
 250     if (pBSSList->bWPAValid == false)
 251         return false;
 252
 253     switch(byCmd) {
 254     case 0:
 255
 256         if (byEncrypt != pBSSList->byGKType)
 257             return false;
 258
 259         if (pBSSList->wPKCount > 0) {
 260             for (ii = 0; ii < pBSSList->wPKCount; ii ++) {
 261                 if (pBSSList->abyPKType[ii] == WPA_AESCCMP)
 262                     byPKType = WPA_AESCCMP;
 263                 else if ((pBSSList->abyPKType[ii] == WPA_TKIP) && (byPKType != WPA_AESCCMP))
 264                      byPKType = WPA_TKIP;
 265                 else if ((pBSSList->abyPKType[ii] == WPA_WEP40) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP))
 266                      byPKType = WPA_WEP40;
 267                 else if ((pBSSList->abyPKType[ii] == WPA_WEP104) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP))
 268                      byPKType = WPA_WEP104;
 269             }
 270             if (byEncrypt != byPKType)
 271                 return false;
 272         }
 273         return true;
 274 //        if (pBSSList->wAuthCount > 0)
 275 //            for (ii=0; ii < pBSSList->wAuthCount; ii ++)
 276 //                if (byAuth == pBSSList->abyAuthType[ii])
 277 //                    break;
 278         break;
 279
 280     default:
 281         break;
 282     }
 283     return false;
 284 }
 285
 286 /*+
 287  *
 288  * Description:
 289  *    Check if RSN IE makes sense.
 290  *
 291  * Parameters:
 292  *  In:
 293  *      pRSN - Pointer to the RSN IE.
 294  *  Out:
 295  *      none
 296  *
 297  * Return Value: none.
 298  *
 299 -*/
 300 bool
 301 WPAb_Is_RSN (
 302     PWLAN_IE_RSN_EXT pRSN
 303     )
 304 {
 305     if (pRSN == NULL)
 306         return false;
 307
 308     if ((pRSN->len >= 6) && // oui1(4)+ver(2)
 309         (pRSN->byElementID == WLAN_EID_RSN_WPA) &&  !memcmp(pRSN->abyOUI, abyOUI01, 4) &&
 310         (pRSN->wVersion == 1)) {
 311         return true;
 312     }
 313     else
 314         return false;
 315 }
 316