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 "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 BYTE abyOUI00[4] = { 0x00, 0x50, 0xf2, 0x00 };
  49 const BYTE abyOUI01[4] = { 0x00, 0x50, 0xf2, 0x01 };
  50 const BYTE abyOUI02[4] = { 0x00, 0x50, 0xf2, 0x02 };
  51 const BYTE abyOUI03[4] = { 0x00, 0x50, 0xf2, 0x03 };
  52 const BYTE abyOUI04[4] = { 0x00, 0x50, 0xf2, 0x04 };
  53 const BYTE 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     PBYTE              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) &&
 152                    (j < sizeof(pBSSList->abyPKType)/sizeof(BYTE)); i++) {
 153                 if(pRSN->len >= 12+i*4+4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*i)
 154                     if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI00, 4))
 155                         pBSSList->abyPKType[j++] = WPA_NONE;
 156                     else if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI02, 4))
 157                         pBSSList->abyPKType[j++] = WPA_TKIP;
 158                     else if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI03, 4))
 159                         pBSSList->abyPKType[j++] = WPA_AESWRAP;
 160                     else if ( !memcmp(pRSN->PKSList[i].abyOUI, abyOUI04, 4))
 161                         pBSSList->abyPKType[j++] = WPA_AESCCMP;
 162                     else
 163                         // any vendor checks here
 164                         ;
 165                 }
 166                 else
 167                     break;
 168                 //DBG_PRN_GRP14(("abyPKType[%d]: %X\n", j-1, pBSSList->abyPKType[j-1]));
 169             } //for
 170             pBSSList->wPKCount = (WORD)j;
 171             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wPKCount: %d\n", pBSSList->wPKCount);
 172         }
 173
 174         m = pRSN->wPKCount;
 175         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"m: %d\n", m);
 176         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"14+m*4: %d\n", 14+m*4);
 177
 178         if (pRSN->len >= 14+m*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)
 179             // overlay IE_RSN_Auth structure into correct place
 180             pIE_RSN_Auth = (PWLAN_IE_RSN_AUTH) pRSN->PKSList[m].abyOUI;
 181             j = 0;
 182             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAuthCount: %d, sizeof(pBSSList->abyAuthType): %zu\n",
 183                           pIE_RSN_Auth->wAuthCount, sizeof(pBSSList->abyAuthType));
 184             for (i = 0; (i < pIE_RSN_Auth->wAuthCount) &&
 185                    (j < sizeof(pBSSList->abyAuthType)/sizeof(BYTE)); i++) {
 186                 if(pRSN->len >= 14+4+(m+i)*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)+AKS(4*i)
 187                     if ( !memcmp(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI01, 4))
 188                         pBSSList->abyAuthType[j++] = WPA_AUTH_IEEE802_1X;
 189                     else if ( !memcmp(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI02, 4))
 190                         pBSSList->abyAuthType[j++] = WPA_AUTH_PSK;
 191                     else
 192                     // any vendor checks here
 193                     ;
 194                 }
 195                 else
 196                     break;
 197                 //DBG_PRN_GRP14(("abyAuthType[%d]: %X\n", j-1, pBSSList->abyAuthType[j-1]));
 198             }
 199             if(j > 0)
 200                 pBSSList->wAuthCount = (WORD)j;
 201             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAuthCount: %d\n", pBSSList->wAuthCount);
 202         }
 203
 204         if (pIE_RSN_Auth != NULL) {
 205
 206             n = pIE_RSN_Auth->wAuthCount;
 207
 208             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"n: %d\n", n);
 209             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"14+4+(m+n)*4: %d\n", 14+4+(m+n)*4);
 210
 211             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)
 212                 pbyCaps = (PBYTE)pIE_RSN_Auth->AuthKSList[n].abyOUI;
 213                 pBSSList->byDefaultK_as_PK = (*pbyCaps) & WPA_GROUPFLAG;
 214                 pBSSList->byReplayIdx = 2 << ((*pbyCaps >> WPA_REPLAYBITSSHIFT) & WPA_REPLAYBITS);
 215                 pBSSList->sRSNCapObj.bRSNCapExist = TRUE;
 216                 pBSSList->sRSNCapObj.wRSNCap = *(PWORD)pbyCaps;
 217                 //DBG_PRN_GRP14(("pbyCaps: %X\n", *pbyCaps));
 218                 //DBG_PRN_GRP14(("byDefaultK_as_PK: %X\n", pBSSList->byDefaultK_as_PK));
 219                 //DBG_PRN_GRP14(("byReplayIdx: %X\n", pBSSList->byReplayIdx));
 220             }
 221         }
 222         pBSSList->bWPAValid = TRUE;
 223     }
 224 }
 225
 226 /*+
 227  *
 228  * Description:
 229  *    Search RSN information in BSSList.
 230  *
 231  * Parameters:
 232  *  In:
 233  *      byCmd    - Search type
 234  *      byEncrypt- Encrcypt Type
 235  *      pBSSList - BSS list
 236  *  Out:
 237  *      none
 238  *
 239  * Return Value: none.
 240  *
 241 -*/
 242 BOOL
 243 WPA_SearchRSN(
 244     BYTE                byCmd,
 245     BYTE                byEncrypt,
 246      PKnownBSS        pBSSList
 247     )
 248 {
 249     int ii;
 250     BYTE byPKType = WPA_NONE;
 251
 252     if (pBSSList->bWPAValid == FALSE)
 253         return FALSE;
 254
 255     switch(byCmd) {
 256     case 0:
 257
 258         if (byEncrypt != pBSSList->byGKType)
 259             return FALSE;
 260
 261         if (pBSSList->wPKCount > 0) {
 262             for (ii = 0; ii < pBSSList->wPKCount; ii ++) {
 263                 if (pBSSList->abyPKType[ii] == WPA_AESCCMP)
 264                     byPKType = WPA_AESCCMP;
 265                 else if ((pBSSList->abyPKType[ii] == WPA_TKIP) && (byPKType != WPA_AESCCMP))
 266                      byPKType = WPA_TKIP;
 267                 else if ((pBSSList->abyPKType[ii] == WPA_WEP40) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP))
 268                      byPKType = WPA_WEP40;
 269                 else if ((pBSSList->abyPKType[ii] == WPA_WEP104) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP))
 270                      byPKType = WPA_WEP104;
 271             }
 272             if (byEncrypt != byPKType)
 273                 return FALSE;
 274         }
 275         return TRUE;
 276 //        if (pBSSList->wAuthCount > 0)
 277 //            for (ii=0; ii < pBSSList->wAuthCount; ii ++)
 278 //                if (byAuth == pBSSList->abyAuthType[ii])
 279 //                    break;
 280         break;
 281
 282     default:
 283         break;
 284     }
 285     return FALSE;
 286 }
 287
 288 /*+
 289  *
 290  * Description:
 291  *    Check if RSN IE makes sense.
 292  *
 293  * Parameters:
 294  *  In:
 295  *      pRSN - Pointer to the RSN IE.
 296  *  Out:
 297  *      none
 298  *
 299  * Return Value: none.
 300  *
 301 -*/
 302 BOOL
 303 WPAb_Is_RSN(
 304      PWLAN_IE_RSN_EXT pRSN
 305     )
 306 {
 307     if (pRSN == NULL)
 308         return FALSE;
 309
 310     if ((pRSN->len >= 6) && // oui1(4)+ver(2)
 311         (pRSN->byElementID == WLAN_EID_RSN_WPA) &&  !memcmp(pRSN->abyOUI, abyOUI01, 4) &&
 312         (pRSN->wVersion == 1)) {
 313         return TRUE;
 314     }
 315     else
 316         return FALSE;
 317 }
 318