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 "umem.h"
  37 #include "tmacro.h"
  38 #include "tether.h"
  39 #include "device.h"
  40 #include "80211hdr.h"
  41 #include "bssdb.h"
  42 #include "wmgr.h"
  43 #include "wpa.h"
  44 #include "80211mgr.h"
  45
  46 /*---------------------  Static Variables  --------------------------*/
  47 static int          msglevel                =MSG_LEVEL_INFO;
  48
  49 const BYTE abyOUI00[4] = { 0x00, 0x50, 0xf2, 0x00 };
  50 const BYTE abyOUI01[4] = { 0x00, 0x50, 0xf2, 0x01 };
  51 const BYTE abyOUI02[4] = { 0x00, 0x50, 0xf2, 0x02 };
  52 const BYTE abyOUI03[4] = { 0x00, 0x50, 0xf2, 0x03 };
  53 const BYTE abyOUI04[4] = { 0x00, 0x50, 0xf2, 0x04 };
  54 const BYTE abyOUI05[4] = { 0x00, 0x50, 0xf2, 0x05 };
  55
  56
  57 /*+
  58  *
  59  * Description:
  60  *    Clear RSN information in BSSList.
  61  *
  62  * Parameters:
  63  *  In:
  64  *      pBSSList - BSS list.
  65  *  Out:
  66  *      none
  67  *
  68  * Return Value: none.
  69  *
  70 -*/
  71
  72 VOID
  73 WPA_ClearRSN (
  74     IN PKnownBSS        pBSSList
  75     )
  76 {
  77     int ii;
  78     pBSSList->byGKType = WPA_TKIP;
  79     for (ii=0; ii < 4; ii ++)
  80         pBSSList->abyPKType[ii] = WPA_TKIP;
  81     pBSSList->wPKCount = 0;
  82     for (ii=0; ii < 4; ii ++)
  83         pBSSList->abyAuthType[ii] = WPA_AUTH_IEEE802_1X;
  84     pBSSList->wAuthCount = 0;
  85     pBSSList->byDefaultK_as_PK = 0;
  86     pBSSList->byReplayIdx = 0;
  87     pBSSList->sRSNCapObj.bRSNCapExist = FALSE;
  88     pBSSList->sRSNCapObj.wRSNCap = 0;
  89     pBSSList->bWPAValid = FALSE;
  90 }
  91
  92
  93 /*+
  94  *
  95  * Description:
  96  *    Parse RSN IE.
  97  *
  98  * Parameters:
  99  *  In:
 100  *      pBSSList - BSS list.
 101  *      pRSN - Pointer to the RSN IE.
 102  *  Out:
 103  *      none
 104  *
 105  * Return Value: none.
 106  *
 107 -*/
 108 VOID
 109 WPA_ParseRSN (
 110     IN PKnownBSS        pBSSList,
 111     IN PWLAN_IE_RSN_EXT pRSN
 112     )
 113 {
 114     PWLAN_IE_RSN_AUTH  pIE_RSN_Auth = NULL;
 115     int                i, j, m, n = 0;
 116     PBYTE              pbyCaps;
 117
 118     WPA_ClearRSN(pBSSList);
 119
 120     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"WPA_ParseRSN: [%d]\n", pRSN->len);
 121
 122     // information element header makes sense
 123     if ((pRSN->len >= 6) // oui1(4)+ver(2)
 124          && (pRSN->byElementID == WLAN_EID_RSN_WPA) && MEMEqualMemory(pRSN->abyOUI, abyOUI01, 4)
 125          && (pRSN->wVersion == 1)) {
 126
 127         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Legal RSN\n");
 128         // update each variable if pRSN is long enough to contain the variable
 129         if (pRSN->len >= 10) //oui1(4)+ver(2)+GKSuite(4)
 130         {
 131             if (MEMEqualMemory(pRSN->abyMulticast, abyOUI01, 4))
 132                 pBSSList->byGKType = WPA_WEP40;
 133             else if (MEMEqualMemory(pRSN->abyMulticast, abyOUI02, 4))
 134                 pBSSList->byGKType = WPA_TKIP;
 135             else if (MEMEqualMemory(pRSN->abyMulticast, abyOUI03, 4))
 136                 pBSSList->byGKType = WPA_AESWRAP;
 137             else if (MEMEqualMemory(pRSN->abyMulticast, abyOUI04, 4))
 138                 pBSSList->byGKType = WPA_AESCCMP;
 139             else if (MEMEqualMemory(pRSN->abyMulticast, abyOUI05, 4))
 140                 pBSSList->byGKType = WPA_WEP104;
 141             else
 142                 // any vendor checks here
 143                 pBSSList->byGKType = WPA_NONE;
 144
 145             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"byGKType: %x\n", pBSSList->byGKType);
 146         }
 147
 148         if (pRSN->len >= 12) //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)
 149         {
 150             j = 0;
 151             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wPKCount: %d, sizeof(pBSSList->abyPKType): %ld\n", pRSN->wPKCount, sizeof(pBSSList->abyPKType));
 152             for(i = 0; (i < pRSN->wPKCount) && (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 (MEMEqualMemory(pRSN->PKSList[i].abyOUI, abyOUI00, 4))
 155                         pBSSList->abyPKType[j++] = WPA_NONE;
 156                     else if (MEMEqualMemory(pRSN->PKSList[i].abyOUI, abyOUI02, 4))
 157                         pBSSList->abyPKType[j++] = WPA_TKIP;
 158                     else if (MEMEqualMemory(pRSN->PKSList[i].abyOUI, abyOUI03, 4))
 159                         pBSSList->abyPKType[j++] = WPA_AESWRAP;
 160                     else if (MEMEqualMemory(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): %ld\n",
 183                           pIE_RSN_Auth->wAuthCount, sizeof(pBSSList->abyAuthType));
 184             for(i = 0; (i < pIE_RSN_Auth->wAuthCount) && (j < sizeof(pBSSList->abyAuthType)/sizeof(BYTE)); i++) {
 185                 if(pRSN->len >= 14+4+(m+i)*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)+AKS(4*i)
 186                     if (MEMEqualMemory(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI01, 4))
 187                         pBSSList->abyAuthType[j++] = WPA_AUTH_IEEE802_1X;
 188                     else if (MEMEqualMemory(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI02, 4))
 189                         pBSSList->abyAuthType[j++] = WPA_AUTH_PSK;
 190                     else
 191                     // any vendor checks here
 192                     ;
 193                 }
 194                 else
 195                     break;
 196                 //DBG_PRN_GRP14(("abyAuthType[%d]: %X\n", j-1, pBSSList->abyAuthType[j-1]));
 197             }
 198             if(j > 0)
 199                 pBSSList->wAuthCount = (WORD)j;
 200             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAuthCount: %d\n", pBSSList->wAuthCount);
 201         }
 202
 203         if (pIE_RSN_Auth != NULL) {
 204
 205             n = pIE_RSN_Auth->wAuthCount;
 206
 207             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"n: %d\n", n);
 208             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"14+4+(m+n)*4: %d\n", 14+4+(m+n)*4);
 209
 210             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)
 211                 pbyCaps = (PBYTE)pIE_RSN_Auth->AuthKSList[n].abyOUI;
 212                 pBSSList->byDefaultK_as_PK = (*pbyCaps) & WPA_GROUPFLAG;
 213                 pBSSList->byReplayIdx = 2 << ((*pbyCaps >> WPA_REPLAYBITSSHIFT) & WPA_REPLAYBITS);
 214                 pBSSList->sRSNCapObj.bRSNCapExist = TRUE;
 215                 pBSSList->sRSNCapObj.wRSNCap = *(PWORD)pbyCaps;
 216                 //DBG_PRN_GRP14(("pbyCaps: %X\n", *pbyCaps));
 217                 //DBG_PRN_GRP14(("byDefaultK_as_PK: %X\n", pBSSList->byDefaultK_as_PK));
 218                 //DBG_PRN_GRP14(("byReplayIdx: %X\n", pBSSList->byReplayIdx));
 219             }
 220         }
 221         pBSSList->bWPAValid = TRUE;
 222     }
 223 }
 224
 225 /*+
 226  *
 227  * Description:
 228  *    Search RSN information in BSSList.
 229  *
 230  * Parameters:
 231  *  In:
 232  *      byCmd    - Search type
 233  *      byEncrypt- Encrcypt Type
 234  *      pBSSList - BSS list
 235  *  Out:
 236  *      none
 237  *
 238  * Return Value: none.
 239  *
 240 -*/
 241 BOOL
 242 WPA_SearchRSN (
 243     BYTE                byCmd,
 244     BYTE                byEncrypt,
 245     IN PKnownBSS        pBSSList
 246     )
 247 {
 248     int ii;
 249     BYTE byPKType = WPA_NONE;
 250
 251     if (pBSSList->bWPAValid == FALSE)
 252         return FALSE;
 253
 254     switch(byCmd) {
 255     case 0:
 256
 257         if (byEncrypt != pBSSList->byGKType)
 258             return FALSE;
 259
 260         if (pBSSList->wPKCount > 0) {
 261             for (ii = 0; ii < pBSSList->wPKCount; ii ++) {
 262                 if (pBSSList->abyPKType[ii] == WPA_AESCCMP)
 263                     byPKType = WPA_AESCCMP;
 264                 else if ((pBSSList->abyPKType[ii] == WPA_TKIP) && (byPKType != WPA_AESCCMP))
 265                      byPKType = WPA_TKIP;
 266                 else if ((pBSSList->abyPKType[ii] == WPA_WEP40) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP))
 267                      byPKType = WPA_WEP40;
 268                 else if ((pBSSList->abyPKType[ii] == WPA_WEP104) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP))
 269                      byPKType = WPA_WEP104;
 270             }
 271             if (byEncrypt != byPKType)
 272                 return FALSE;
 273         }
 274         return TRUE;
 275 //        if (pBSSList->wAuthCount > 0)
 276 //            for (ii=0; ii < pBSSList->wAuthCount; ii ++)
 277 //                if (byAuth == pBSSList->abyAuthType[ii])
 278 //                    break;
 279         break;
 280
 281     default:
 282         break;
 283     }
 284     return FALSE;
 285 }
 286
 287 /*+
 288  *
 289  * Description:
 290  *    Check if RSN IE makes sense.
 291  *
 292  * Parameters:
 293  *  In:
 294  *      pRSN - Pointer to the RSN IE.
 295  *  Out:
 296  *      none
 297  *
 298  * Return Value: none.
 299  *
 300 -*/
 301 BOOL
 302 WPAb_Is_RSN (
 303     IN PWLAN_IE_RSN_EXT pRSN
 304     )
 305 {
 306     if (pRSN == NULL)
 307         return FALSE;
 308
 309     if ((pRSN->len >= 6) && // oui1(4)+ver(2)
 310         (pRSN->byElementID == WLAN_EID_RSN_WPA) && MEMEqualMemory(pRSN->abyOUI, abyOUI01, 4) &&
 311         (pRSN->wVersion == 1)) {
 312         return TRUE;
 313     }
 314     else
 315         return FALSE;
 316 }
 317