drivers/staging/vt6656/wpa2.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: wpa2.c
  21  *
  22  * Purpose: Handles the Basic Service Set & Node Database functions
  23  *
  24  * Functions:
  25  *
  26  * Revision History:
  27  *
  28  * Author: Yiching Chen
  29  *
  30  * Date: Oct. 4, 2004
  31  *
  32  */
  33
  34 #include "wpa2.h"
  35 #include "device.h"
  36
  37 /*---------------------  Static Definitions -------------------------*/
  38 static int          msglevel                =MSG_LEVEL_INFO;
  39 //static int          msglevel                =MSG_LEVEL_DEBUG;
  40 /*---------------------  Static Classes  ----------------------------*/
  41
  42 /*---------------------  Static Variables  --------------------------*/
  43
  44 const BYTE abyOUIGK[4]      = { 0x00, 0x0F, 0xAC, 0x00 };
  45 const BYTE abyOUIWEP40[4]   = { 0x00, 0x0F, 0xAC, 0x01 };
  46 const BYTE abyOUIWEP104[4]  = { 0x00, 0x0F, 0xAC, 0x05 };
  47 const BYTE abyOUITKIP[4]    = { 0x00, 0x0F, 0xAC, 0x02 };
  48 const BYTE abyOUICCMP[4]    = { 0x00, 0x0F, 0xAC, 0x04 };
  49
  50 const BYTE abyOUI8021X[4]   = { 0x00, 0x0F, 0xAC, 0x01 };
  51 const BYTE abyOUIPSK[4]     = { 0x00, 0x0F, 0xAC, 0x02 };
  52
  53
  54 /*---------------------  Static Functions  --------------------------*/
  55
  56 /*---------------------  Export Variables  --------------------------*/
  57
  58 /*---------------------  Export Functions  --------------------------*/
  59
  60 /*+
  61  *
  62  * Description:
  63  *    Clear RSN information in BSSList.
  64  *
  65  * Parameters:
  66  *  In:
  67  *      pBSSNode - BSS list.
  68  *  Out:
  69  *      none
  70  *
  71  * Return Value: none.
  72  *
  73 -*/
  74 void
  75 WPA2_ClearRSN (
  76      PKnownBSS        pBSSNode
  77     )
  78 {
  79     int ii;
  80
  81     pBSSNode->bWPA2Valid = FALSE;
  82
  83     pBSSNode->byCSSGK = WLAN_11i_CSS_CCMP;
  84     for (ii=0; ii < 4; ii ++)
  85         pBSSNode->abyCSSPK[ii] = WLAN_11i_CSS_CCMP;
  86     pBSSNode->wCSSPKCount = 1;
  87     for (ii=0; ii < 4; ii ++)
  88         pBSSNode->abyAKMSSAuthType[ii] = WLAN_11i_AKMSS_802_1X;
  89     pBSSNode->wAKMSSAuthCount = 1;
  90     pBSSNode->sRSNCapObj.bRSNCapExist = FALSE;
  91     pBSSNode->sRSNCapObj.wRSNCap = 0;
  92 }
  93
  94 /*+
  95  *
  96  * Description:
  97  *    Parse RSN IE.
  98  *
  99  * Parameters:
 100  *  In:
 101  *      pBSSNode - BSS list.
 102  *      pRSN - Pointer to the RSN IE.
 103  *  Out:
 104  *      none
 105  *
 106  * Return Value: none.
 107  *
 108 -*/
 109 void
 110 WPA2vParseRSN (
 111      PKnownBSS        pBSSNode,
 112      PWLAN_IE_RSN     pRSN
 113     )
 114 {
 115     int                 i, j;
 116     WORD                m = 0, n = 0;
 117     PBYTE               pbyOUI;
 118     BOOL                bUseGK = FALSE;
 119
 120     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"WPA2_ParseRSN: [%d]\n", pRSN->len);
 121
 122     WPA2_ClearRSN(pBSSNode);
 123
 124     if (pRSN->len == 2) { // ver(2)
 125         if ((pRSN->byElementID == WLAN_EID_RSN) && (pRSN->wVersion == 1)) {
 126             pBSSNode->bWPA2Valid = TRUE;
 127         }
 128         return;
 129     }
 130
 131     if (pRSN->len < 6) { // ver(2) + GK(4)
 132         // invalid CSS, P802.11i/D10.0, p31
 133         return;
 134     }
 135
 136     // information element header makes sense
 137     if ((pRSN->byElementID == WLAN_EID_RSN) &&
 138         (pRSN->wVersion == 1)) {
 139
 140         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Legal 802.11i RSN\n");
 141
 142         pbyOUI = &(pRSN->abyRSN[0]);
 143         if ( !memcmp(pbyOUI, abyOUIWEP40, 4))
 144             pBSSNode->byCSSGK = WLAN_11i_CSS_WEP40;
 145         else if ( !memcmp(pbyOUI, abyOUITKIP, 4))
 146             pBSSNode->byCSSGK = WLAN_11i_CSS_TKIP;
 147         else if ( !memcmp(pbyOUI, abyOUICCMP, 4))
 148             pBSSNode->byCSSGK = WLAN_11i_CSS_CCMP;
 149         else if ( !memcmp(pbyOUI, abyOUIWEP104, 4))
 150             pBSSNode->byCSSGK = WLAN_11i_CSS_WEP104;
 151         else if ( !memcmp(pbyOUI, abyOUIGK, 4)) {
 152             // invalid CSS, P802.11i/D10.0, p32
 153             return;
 154         } else
 155             // any vendor checks here
 156             pBSSNode->byCSSGK = WLAN_11i_CSS_UNKNOWN;
 157
 158         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"802.11i CSS: %X\n", pBSSNode->byCSSGK);
 159
 160         if (pRSN->len == 6) {
 161             pBSSNode->bWPA2Valid = TRUE;
 162             return;
 163         }
 164
 165         if (pRSN->len >= 8) { // ver(2) + GK(4) + PK count(2)
 166             pBSSNode->wCSSPKCount = *((PWORD) &(pRSN->abyRSN[4]));
 167             j = 0;
 168             pbyOUI = &(pRSN->abyRSN[6]);
 169
 170             for (i = 0; (i < pBSSNode->wCSSPKCount) && (j < sizeof(pBSSNode->abyCSSPK)/sizeof(BYTE)); i++) {
 171
 172                 if (pRSN->len >= 8+i*4+4) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*i)
 173                     if ( !memcmp(pbyOUI, abyOUIGK, 4)) {
 174                         pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_USE_GROUP;
 175                         bUseGK = TRUE;
 176                     } else if ( !memcmp(pbyOUI, abyOUIWEP40, 4)) {
 177                         // Invialid CSS, continue to parsing
 178                     } else if ( !memcmp(pbyOUI, abyOUITKIP, 4)) {
 179                         if (pBSSNode->byCSSGK != WLAN_11i_CSS_CCMP)
 180                             pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_TKIP;
 181                         else
 182                             ; // Invialid CSS, continue to parsing
 183                     } else if ( !memcmp(pbyOUI, abyOUICCMP, 4)) {
 184                         pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_CCMP;
 185                     } else if ( !memcmp(pbyOUI, abyOUIWEP104, 4)) {
 186                         // Invialid CSS, continue to parsing
 187                     } else {
 188                         // any vendor checks here
 189                         pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_UNKNOWN;
 190                     }
 191                     pbyOUI += 4;
 192                     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"abyCSSPK[%d]: %X\n", j-1, pBSSNode->abyCSSPK[j-1]);
 193                 } else
 194                     break;
 195             } //for
 196
 197             if (bUseGK == TRUE) {
 198                 if (j != 1) {
 199                     // invalid CSS, This should be only PK CSS.
 200                     return;
 201                 }
 202                 if (pBSSNode->byCSSGK == WLAN_11i_CSS_CCMP) {
 203                     // invalid CSS, If CCMP is enable , PK can't be CSSGK.
 204                     return;
 205                 }
 206             }
 207             if ((pBSSNode->wCSSPKCount != 0) && (j == 0)) {
 208                 // invalid CSS, No valid PK.
 209                 return;
 210             }
 211             pBSSNode->wCSSPKCount = (WORD)j;
 212             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wCSSPKCount: %d\n", pBSSNode->wCSSPKCount);
 213         }
 214
 215         m = *((PWORD) &(pRSN->abyRSN[4]));
 216
 217         if (pRSN->len >= 10+m*4) { // ver(2) + GK(4) + PK count(2) + PKS(4*m) + AKMSS count(2)
 218             pBSSNode->wAKMSSAuthCount = *((PWORD) &(pRSN->abyRSN[6+4*m]));
 219             j = 0;
 220             pbyOUI = &(pRSN->abyRSN[8+4*m]);
 221             for (i = 0; (i < pBSSNode->wAKMSSAuthCount) && (j < sizeof(pBSSNode->abyAKMSSAuthType)/sizeof(BYTE)); i++) {
 222                 if (pRSN->len >= 10+(m+i)*4+4) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*m)+AKMSS(2)+AKS(4*i)
 223                     if ( !memcmp(pbyOUI, abyOUI8021X, 4))
 224                         pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_802_1X;
 225                     else if ( !memcmp(pbyOUI, abyOUIPSK, 4))
 226                         pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_PSK;
 227                     else
 228                         // any vendor checks here
 229                         pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_UNKNOWN;
 230                     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"abyAKMSSAuthType[%d]: %X\n", j-1, pBSSNode->abyAKMSSAuthType[j-1]);
 231                 } else
 232                     break;
 233             }
 234             pBSSNode->wAKMSSAuthCount = (WORD)j;
 235             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAKMSSAuthCount: %d\n", pBSSNode->wAKMSSAuthCount);
 236
 237             n = *((PWORD) &(pRSN->abyRSN[6+4*m]));
 238             if (pRSN->len >= 12+4*m+4*n) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*m)+AKMSSCnt(2)+AKMSS(4*n)+Cap(2)
 239                 pBSSNode->sRSNCapObj.bRSNCapExist = TRUE;
 240                 pBSSNode->sRSNCapObj.wRSNCap = *((PWORD) &(pRSN->abyRSN[8+4*m+4*n]));
 241             }
 242         }
 243         //ignore PMKID lists bcs only (Re)Assocrequest has this field
 244         pBSSNode->bWPA2Valid = TRUE;
 245     }
 246 }
 247
 248
 249 /*+
 250  *
 251  * Description:
 252  *    Set WPA IEs
 253  *
 254  * Parameters:
 255  *  In:
 256  *      pMgmtHandle - Pointer to management object
 257  *  Out:
 258  *      pRSNIEs     - Pointer to the RSN IE to set.
 259  *
 260  * Return Value: length of IEs.
 261  *
 262 -*/
 263 unsigned int
 264 WPA2uSetIEs(void *pMgmtHandle,
 265      PWLAN_IE_RSN pRSNIEs
 266     )
 267 {
 268     PSMgmtObject    pMgmt = (PSMgmtObject) pMgmtHandle;
 269     PBYTE           pbyBuffer = NULL;
 270     unsigned int            ii = 0;
 271     PWORD           pwPMKID = NULL;
 272
 273     if (pRSNIEs == NULL) {
 274         return(0);
 275     }
 276     if (((pMgmt->eAuthenMode == WMAC_AUTH_WPA2) ||
 277          (pMgmt->eAuthenMode == WMAC_AUTH_WPA2PSK)) &&
 278         (pMgmt->pCurrBSS != NULL)) {
 279         /* WPA2 IE */
 280         pbyBuffer = (PBYTE) pRSNIEs;
 281         pRSNIEs->byElementID = WLAN_EID_RSN;
 282         pRSNIEs->len = 6; //Version(2)+GK(4)
 283         pRSNIEs->wVersion = 1;
 284         //Group Key Cipher Suite
 285         pRSNIEs->abyRSN[0] = 0x00;
 286         pRSNIEs->abyRSN[1] = 0x0F;
 287         pRSNIEs->abyRSN[2] = 0xAC;
 288         if (pMgmt->byCSSGK == KEY_CTL_WEP) {
 289             pRSNIEs->abyRSN[3] = pMgmt->pCurrBSS->byCSSGK;
 290         } else if (pMgmt->byCSSGK == KEY_CTL_TKIP) {
 291             pRSNIEs->abyRSN[3] = WLAN_11i_CSS_TKIP;
 292         } else if (pMgmt->byCSSGK == KEY_CTL_CCMP) {
 293             pRSNIEs->abyRSN[3] = WLAN_11i_CSS_CCMP;
 294         } else {
 295             pRSNIEs->abyRSN[3] = WLAN_11i_CSS_UNKNOWN;
 296         }
 297
 298         // Pairwise Key Cipher Suite
 299         pRSNIEs->abyRSN[4] = 1;
 300         pRSNIEs->abyRSN[5] = 0;
 301         pRSNIEs->abyRSN[6] = 0x00;
 302         pRSNIEs->abyRSN[7] = 0x0F;
 303         pRSNIEs->abyRSN[8] = 0xAC;
 304         if (pMgmt->byCSSPK == KEY_CTL_TKIP) {
 305             pRSNIEs->abyRSN[9] = WLAN_11i_CSS_TKIP;
 306         } else if (pMgmt->byCSSPK == KEY_CTL_CCMP) {
 307             pRSNIEs->abyRSN[9] = WLAN_11i_CSS_CCMP;
 308         } else if (pMgmt->byCSSPK == KEY_CTL_NONE) {
 309             pRSNIEs->abyRSN[9] = WLAN_11i_CSS_USE_GROUP;
 310         } else {
 311             pRSNIEs->abyRSN[9] = WLAN_11i_CSS_UNKNOWN;
 312         }
 313         pRSNIEs->len += 6;
 314
 315         // Auth Key Management Suite
 316         pRSNIEs->abyRSN[10] = 1;
 317         pRSNIEs->abyRSN[11] = 0;
 318         pRSNIEs->abyRSN[12] = 0x00;
 319         pRSNIEs->abyRSN[13] = 0x0F;
 320         pRSNIEs->abyRSN[14] = 0xAC;
 321         if (pMgmt->eAuthenMode == WMAC_AUTH_WPA2PSK) {
 322             pRSNIEs->abyRSN[15] = WLAN_11i_AKMSS_PSK;
 323         } else if (pMgmt->eAuthenMode == WMAC_AUTH_WPA2) {
 324             pRSNIEs->abyRSN[15] = WLAN_11i_AKMSS_802_1X;
 325         } else {
 326             pRSNIEs->abyRSN[15] = WLAN_11i_AKMSS_UNKNOWN;
 327         }
 328         pRSNIEs->len +=6;
 329
 330         // RSN Capabilites
 331         if (pMgmt->pCurrBSS->sRSNCapObj.bRSNCapExist == TRUE) {
 332             memcpy(&pRSNIEs->abyRSN[16], &pMgmt->pCurrBSS->sRSNCapObj.wRSNCap, 2);
 333         } else {
 334             pRSNIEs->abyRSN[16] = 0;
 335             pRSNIEs->abyRSN[17] = 0;
 336         }
 337         pRSNIEs->len +=2;
 338
 339         if ((pMgmt->gsPMKIDCache.BSSIDInfoCount > 0) &&
 340             (pMgmt->bRoaming == TRUE) &&
 341             (pMgmt->eAuthenMode == WMAC_AUTH_WPA2)) {
 342                 /* RSN PMKID, pointer to PMKID count */
 343                 pwPMKID = (PWORD)(&pRSNIEs->abyRSN[18]);
 344                 *pwPMKID = 0;                     /* Initialize PMKID count */
 345                 pbyBuffer = &pRSNIEs->abyRSN[20];    /* Point to PMKID list */
 346                 for (ii = 0; ii < pMgmt->gsPMKIDCache.BSSIDInfoCount; ii++) {
 347                         if (!memcmp(&pMgmt->
 348                                     gsPMKIDCache.BSSIDInfo[ii].abyBSSID[0],
 349                                     pMgmt->abyCurrBSSID,
 350                                     ETH_ALEN)) {
 351                                 (*pwPMKID)++;
 352                                 memcpy(pbyBuffer,
 353                         pMgmt->gsPMKIDCache.BSSIDInfo[ii].abyPMKID,
 354                                        16);
 355                                 pbyBuffer += 16;
 356                         }
 357                 }
 358             if (*pwPMKID != 0) {
 359                 pRSNIEs->len += (2 + (*pwPMKID)*16);
 360             } else {
 361                 pbyBuffer = &pRSNIEs->abyRSN[18];
 362             }
 363         }
 364         return(pRSNIEs->len + WLAN_IEHDR_LEN);
 365     }
 366     return(0);
 367 }