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
  36 #if !defined(__TTYPE_H__)
  37 #include "ttype.h"
  38 #endif
  39 #if !defined(__UMEM_H__)
  40 #include "umem.h"
  41 #endif
  42 #if !defined(__TMACRO_H__)
  43 #include "tmacro.h"
  44 #endif
  45 #if !defined(__TETHER_H__)
  46 #include "tether.h"
  47 #endif
  48 #if !defined(__DEVICE_H__)
  49 #include "device.h"
  50 #endif
  51 #if !defined(__80211HDR_H__)
  52 #include "80211hdr.h"
  53 #endif
  54 #if !defined(__BSSDB_H__)
  55 #include "bssdb.h"
  56 #endif
  57 #if !defined(__WMGR_H__)
  58 #include "wmgr.h"
  59 #endif
  60 #if !defined(__WPA_H__)
  61 #include "wpa.h"
  62 #endif
  63 #if !defined(__80211MGR_H__)
  64 #include "80211mgr.h"
  65 #endif
  66
  67
  68 /*---------------------  Static Variables  --------------------------*/
  69 static int          msglevel                =MSG_LEVEL_INFO;
  70
  71 const BYTE abyOUI00[4] = { 0x00, 0x50, 0xf2, 0x00 };
  72 const BYTE abyOUI01[4] = { 0x00, 0x50, 0xf2, 0x01 };
  73 const BYTE abyOUI02[4] = { 0x00, 0x50, 0xf2, 0x02 };
  74 const BYTE abyOUI03[4] = { 0x00, 0x50, 0xf2, 0x03 };
  75 const BYTE abyOUI04[4] = { 0x00, 0x50, 0xf2, 0x04 };
  76 const BYTE abyOUI05[4] = { 0x00, 0x50, 0xf2, 0x05 };
  77
  78
  79 /*+
  80  *
  81  * Description:
  82  *    Clear RSN information in BSSList.
  83  *
  84  * Parameters:
  85  *  In:
  86  *      pBSSList - BSS list.
  87  *  Out:
  88  *      none
  89  *
  90  * Return Value: none.
  91  *
  92 -*/
  93
  94 VOID
  95 WPA_ClearRSN (
  96     IN PKnownBSS        pBSSList
  97     )
  98 {
  99     int ii;
 100     pBSSList->byGKType = WPA_TKIP;
 101     for (ii=0; ii < 4; ii ++)
 102         pBSSList->abyPKType[ii] = WPA_TKIP;
 103     pBSSList->wPKCount = 0;
 104     for (ii=0; ii < 4; ii ++)
 105         pBSSList->abyAuthType[ii] = WPA_AUTH_IEEE802_1X;
 106     pBSSList->wAuthCount = 0;
 107     pBSSList->byDefaultK_as_PK = 0;
 108     pBSSList->byReplayIdx = 0;
 109     pBSSList->sRSNCapObj.bRSNCapExist = FALSE;
 110     pBSSList->sRSNCapObj.wRSNCap = 0;
 111     pBSSList->bWPAValid = FALSE;
 112 }
 113
 114
 115 /*+
 116  *
 117  * Description:
 118  *    Parse RSN IE.
 119  *
 120  * Parameters:
 121  *  In:
 122  *      pBSSList - BSS list.
 123  *      pRSN - Pointer to the RSN IE.
 124  *  Out:
 125  *      none
 126  *
 127  * Return Value: none.
 128  *
 129 -*/
 130 VOID
 131 WPA_ParseRSN (
 132     IN PKnownBSS        pBSSList,
 133     IN PWLAN_IE_RSN_EXT pRSN
 134     )
 135 {
 136     PWLAN_IE_RSN_AUTH  pIE_RSN_Auth = NULL;
 137     int                i, j, m, n = 0;
 138     PBYTE              pbyCaps;
 139
 140     WPA_ClearRSN(pBSSList);
 141
 142     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"WPA_ParseRSN: [%d]\n", pRSN->len);
 143
 144     // information element header makes sense
 145     if ((pRSN->len >= 6) // oui1(4)+ver(2)
 146          && (pRSN->byElementID == WLAN_EID_RSN_WPA) && MEMEqualMemory(pRSN->abyOUI, abyOUI01, 4)
 147          && (pRSN->wVersion == 1)) {
 148
 149         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Legal RSN\n");
 150         // update each variable if pRSN is long enough to contain the variable
 151         if (pRSN->len >= 10) //oui1(4)+ver(2)+GKSuite(4)
 152         {
 153             if (MEMEqualMemory(pRSN->abyMulticast, abyOUI01, 4))
 154                 pBSSList->byGKType = WPA_WEP40;
 155             else if (MEMEqualMemory(pRSN->abyMulticast, abyOUI02, 4))
 156                 pBSSList->byGKType = WPA_TKIP;
 157             else if (MEMEqualMemory(pRSN->abyMulticast, abyOUI03, 4))
 158                 pBSSList->byGKType = WPA_AESWRAP;
 159             else if (MEMEqualMemory(pRSN->abyMulticast, abyOUI04, 4))
 160                 pBSSList->byGKType = WPA_AESCCMP;
 161             else if (MEMEqualMemory(pRSN->abyMulticast, abyOUI05, 4))
 162                 pBSSList->byGKType = WPA_WEP104;
 163             else
 164                 // any vendor checks here
 165                 pBSSList->byGKType = WPA_NONE;
 166
 167             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"byGKType: %x\n", pBSSList->byGKType);
 168         }
 169
 170         if (pRSN->len >= 12) //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)
 171         {
 172             j = 0;
 173             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wPKCount: %d, sizeof(pBSSList->abyPKType): %d\n", pRSN->wPKCount, sizeof(pBSSList->abyPKType));
 174             for(i = 0; (i < pRSN->wPKCount) && (j < sizeof(pBSSList->abyPKType)/sizeof(BYTE)); i++) {
 175                 if(pRSN->len >= 12+i*4+4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*i)
 176                     if (MEMEqualMemory(pRSN->PKSList[i].abyOUI, abyOUI00, 4))
 177                         pBSSList->abyPKType[j++] = WPA_NONE;
 178                     else if (MEMEqualMemory(pRSN->PKSList[i].abyOUI, abyOUI02, 4))
 179                         pBSSList->abyPKType[j++] = WPA_TKIP;
 180                     else if (MEMEqualMemory(pRSN->PKSList[i].abyOUI, abyOUI03, 4))
 181                         pBSSList->abyPKType[j++] = WPA_AESWRAP;
 182                     else if (MEMEqualMemory(pRSN->PKSList[i].abyOUI, abyOUI04, 4))
 183                         pBSSList->abyPKType[j++] = WPA_AESCCMP;
 184                     else
 185                         // any vendor checks here
 186                         ;
 187                 }
 188                 else
 189                     break;
 190                 //DBG_PRN_GRP14(("abyPKType[%d]: %X\n", j-1, pBSSList->abyPKType[j-1]));
 191             } //for
 192             pBSSList->wPKCount = (WORD)j;
 193             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wPKCount: %d\n", pBSSList->wPKCount);
 194         }
 195
 196         m = pRSN->wPKCount;
 197         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"m: %d\n", m);
 198         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"14+m*4: %d\n", 14+m*4);
 199
 200         if (pRSN->len >= 14+m*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)
 201             // overlay IE_RSN_Auth structure into correct place
 202             pIE_RSN_Auth = (PWLAN_IE_RSN_AUTH) pRSN->PKSList[m].abyOUI;
 203             j = 0;
 204             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAuthCount: %d, sizeof(pBSSList->abyAuthType): %d\n",
 205                           pIE_RSN_Auth->wAuthCount, sizeof(pBSSList->abyAuthType));
 206             for(i = 0; (i < pIE_RSN_Auth->wAuthCount) && (j < sizeof(pBSSList->abyAuthType)/sizeof(BYTE)); i++) {
 207                 if(pRSN->len >= 14+4+(m+i)*4) { //oui1(4)+ver(2)+GKS(4)+PKSCnt(2)+PKS(4*m)+AKC(2)+AKS(4*i)
 208                     if (MEMEqualMemory(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI01, 4))
 209                         pBSSList->abyAuthType[j++] = WPA_AUTH_IEEE802_1X;
 210                     else if (MEMEqualMemory(pIE_RSN_Auth->AuthKSList[i].abyOUI, abyOUI02, 4))
 211                         pBSSList->abyAuthType[j++] = WPA_AUTH_PSK;
 212                     else
 213                     // any vendor checks here
 214                     ;
 215                 }
 216                 else
 217                     break;
 218                 //DBG_PRN_GRP14(("abyAuthType[%d]: %X\n", j-1, pBSSList->abyAuthType[j-1]));
 219             }
 220             if(j > 0)
 221                 pBSSList->wAuthCount = (WORD)j;
 222             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAuthCount: %d\n", pBSSList->wAuthCount);
 223         }
 224
 225         if (pIE_RSN_Auth != NULL) {
 226
 227             n = pIE_RSN_Auth->wAuthCount;
 228
 229             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"n: %d\n", n);
 230             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"14+4+(m+n)*4: %d\n", 14+4+(m+n)*4);
 231
 232             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)
 233                 pbyCaps = (PBYTE)pIE_RSN_Auth->AuthKSList[n].abyOUI;
 234                 pBSSList->byDefaultK_as_PK = (*pbyCaps) & WPA_GROUPFLAG;
 235                 pBSSList->byReplayIdx = 2 << ((*pbyCaps >> WPA_REPLAYBITSSHIFT) & WPA_REPLAYBITS);
 236                 pBSSList->sRSNCapObj.bRSNCapExist = TRUE;
 237                 pBSSList->sRSNCapObj.wRSNCap = *(PWORD)pbyCaps;
 238                 //DBG_PRN_GRP14(("pbyCaps: %X\n", *pbyCaps));
 239                 //DBG_PRN_GRP14(("byDefaultK_as_PK: %X\n", pBSSList->byDefaultK_as_PK));
 240                 //DBG_PRN_GRP14(("byReplayIdx: %X\n", pBSSList->byReplayIdx));
 241             }
 242         }
 243         pBSSList->bWPAValid = TRUE;
 244     }
 245 }
 246
 247 /*+
 248  *
 249  * Description:
 250  *    Search RSN information in BSSList.
 251  *
 252  * Parameters:
 253  *  In:
 254  *      byCmd    - Search type
 255  *      byEncrypt- Encrcypt Type
 256  *      pBSSList - BSS list
 257  *  Out:
 258  *      none
 259  *
 260  * Return Value: none.
 261  *
 262 -*/
 263 BOOL
 264 WPA_SearchRSN (
 265     BYTE                byCmd,
 266     BYTE                byEncrypt,
 267     IN PKnownBSS        pBSSList
 268     )
 269 {
 270     int ii;
 271     BYTE byPKType = WPA_NONE;
 272
 273     if (pBSSList->bWPAValid == FALSE)
 274         return FALSE;
 275
 276     switch(byCmd) {
 277     case 0:
 278
 279         if (byEncrypt != pBSSList->byGKType)
 280             return FALSE;
 281
 282         if (pBSSList->wPKCount > 0) {
 283             for (ii = 0; ii < pBSSList->wPKCount; ii ++) {
 284                 if (pBSSList->abyPKType[ii] == WPA_AESCCMP)
 285                     byPKType = WPA_AESCCMP;
 286                 else if ((pBSSList->abyPKType[ii] == WPA_TKIP) && (byPKType != WPA_AESCCMP))
 287                      byPKType = WPA_TKIP;
 288                 else if ((pBSSList->abyPKType[ii] == WPA_WEP40) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP))
 289                      byPKType = WPA_WEP40;
 290                 else if ((pBSSList->abyPKType[ii] == WPA_WEP104) && (byPKType != WPA_AESCCMP) && (byPKType != WPA_TKIP))
 291                      byPKType = WPA_WEP104;
 292             }
 293             if (byEncrypt != byPKType)
 294                 return FALSE;
 295         }
 296         return TRUE;
 297 //        if (pBSSList->wAuthCount > 0)
 298 //            for (ii=0; ii < pBSSList->wAuthCount; ii ++)
 299 //                if (byAuth == pBSSList->abyAuthType[ii])
 300 //                    break;
 301         break;
 302
 303     default:
 304         break;
 305     }
 306     return FALSE;
 307 }
 308
 309 /*+
 310  *
 311  * Description:
 312  *    Check if RSN IE makes sense.
 313  *
 314  * Parameters:
 315  *  In:
 316  *      pRSN - Pointer to the RSN IE.
 317  *  Out:
 318  *      none
 319  *
 320  * Return Value: none.
 321  *
 322 -*/
 323 BOOL
 324 WPAb_Is_RSN (
 325     IN PWLAN_IE_RSN_EXT pRSN
 326     )
 327 {
 328     if (pRSN == NULL)
 329         return FALSE;
 330
 331     if ((pRSN->len >= 6) && // oui1(4)+ver(2)
 332         (pRSN->byElementID == WLAN_EID_RSN_WPA) && MEMEqualMemory(pRSN->abyOUI, abyOUI01, 4) &&
 333         (pRSN->wVersion == 1)) {
 334         return TRUE;
 335     }
 336     else
 337         return FALSE;
 338 }
 339