drivers/staging/vt6655/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 #include "wmgr.h"
  37
  38 /*---------------------  Static Definitions -------------------------*/
  39 static int          msglevel                =MSG_LEVEL_INFO;
  40 //static int          msglevel                =MSG_LEVEL_DEBUG;
  41 /*---------------------  Static Classes  ----------------------------*/
  42
  43 /*---------------------  Static Variables  --------------------------*/
  44
  45 const unsigned char abyOUIGK[4]      = { 0x00, 0x0F, 0xAC, 0x00 };
  46 const unsigned char abyOUIWEP40[4]   = { 0x00, 0x0F, 0xAC, 0x01 };
  47 const unsigned char abyOUIWEP104[4]  = { 0x00, 0x0F, 0xAC, 0x05 };
  48 const unsigned char abyOUITKIP[4]    = { 0x00, 0x0F, 0xAC, 0x02 };
  49 const unsigned char abyOUICCMP[4]    = { 0x00, 0x0F, 0xAC, 0x04 };
  50
  51 const unsigned char abyOUI8021X[4]   = { 0x00, 0x0F, 0xAC, 0x01 };
  52 const unsigned char abyOUIPSK[4]     = { 0x00, 0x0F, 0xAC, 0x02 };
  53
  54
  55 /*---------------------  Static Functions  --------------------------*/
  56
  57 /*---------------------  Export Variables  --------------------------*/
  58
  59 /*---------------------  Export Functions  --------------------------*/
  60
  61 /*+
  62  *
  63  * Description:
  64  *    Clear RSN information in BSSList.
  65  *
  66  * Parameters:
  67  *  In:
  68  *      pBSSNode - BSS list.
  69  *  Out:
  70  *      none
  71  *
  72  * Return Value: none.
  73  *
  74 -*/
  75 void
  76 WPA2_ClearRSN (
  77     PKnownBSS        pBSSNode
  78     )
  79 {
  80     int ii;
  81
  82     pBSSNode->bWPA2Valid = false;
  83
  84     pBSSNode->byCSSGK = WLAN_11i_CSS_CCMP;
  85     for (ii=0; ii < 4; ii ++)
  86         pBSSNode->abyCSSPK[ii] = WLAN_11i_CSS_CCMP;
  87     pBSSNode->wCSSPKCount = 1;
  88     for (ii=0; ii < 4; ii ++)
  89         pBSSNode->abyAKMSSAuthType[ii] = WLAN_11i_AKMSS_802_1X;
  90     pBSSNode->wAKMSSAuthCount = 1;
  91     pBSSNode->sRSNCapObj.bRSNCapExist = false;
  92     pBSSNode->sRSNCapObj.wRSNCap = 0;
  93 }
  94
  95 /*+
  96  *
  97  * Description:
  98  *    Parse RSN IE.
  99  *
 100  * Parameters:
 101  *  In:
 102  *      pBSSNode - BSS list.
 103  *      pRSN - Pointer to the RSN IE.
 104  *  Out:
 105  *      none
 106  *
 107  * Return Value: none.
 108  *
 109 -*/
 110 void
 111 WPA2vParseRSN (
 112     PKnownBSS        pBSSNode,
 113     PWLAN_IE_RSN     pRSN
 114     )
 115 {
 116     int                 i, j;
 117     unsigned short m = 0, n = 0;
 118     unsigned char *pbyOUI;
 119     bool bUseGK = false;
 120
 121     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"WPA2_ParseRSN: [%d]\n", pRSN->len);
 122
 123     WPA2_ClearRSN(pBSSNode);
 124
 125     if (pRSN->len == 2) { // ver(2)
 126         if ((pRSN->byElementID == WLAN_EID_RSN) && (pRSN->wVersion == 1)) {
 127             pBSSNode->bWPA2Valid = true;
 128         }
 129         return;
 130     }
 131
 132     if (pRSN->len < 6) { // ver(2) + GK(4)
 133         // invalid CSS, P802.11i/D10.0, p31
 134         return;
 135     }
 136
 137     // information element header makes sense
 138     if ((pRSN->byElementID == WLAN_EID_RSN) &&
 139         (pRSN->wVersion == 1)) {
 140
 141         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Legal 802.11i RSN\n");
 142
 143         pbyOUI = &(pRSN->abyRSN[0]);
 144         if ( !memcmp(pbyOUI, abyOUIWEP40, 4))
 145             pBSSNode->byCSSGK = WLAN_11i_CSS_WEP40;
 146         else if ( !memcmp(pbyOUI, abyOUITKIP, 4))
 147             pBSSNode->byCSSGK = WLAN_11i_CSS_TKIP;
 148         else if ( !memcmp(pbyOUI, abyOUICCMP, 4))
 149             pBSSNode->byCSSGK = WLAN_11i_CSS_CCMP;
 150         else if ( !memcmp(pbyOUI, abyOUIWEP104, 4))
 151             pBSSNode->byCSSGK = WLAN_11i_CSS_WEP104;
 152         else if ( !memcmp(pbyOUI, abyOUIGK, 4)) {
 153             // invalid CSS, P802.11i/D10.0, p32
 154             return;
 155         } else
 156             // any vendor checks here
 157             pBSSNode->byCSSGK = WLAN_11i_CSS_UNKNOWN;
 158
 159         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"802.11i CSS: %X\n", pBSSNode->byCSSGK);
 160
 161         if (pRSN->len == 6) {
 162             pBSSNode->bWPA2Valid = true;
 163             return;
 164         }
 165
 166         if (pRSN->len >= 8) { // ver(2) + GK(4) + PK count(2)
 167             pBSSNode->wCSSPKCount = *((unsigned short *) &(pRSN->abyRSN[4]));
 168             j = 0;
 169             pbyOUI = &(pRSN->abyRSN[6]);
 170
 171             for (i = 0; (i < pBSSNode->wCSSPKCount) && (j < sizeof(pBSSNode->abyCSSPK)/sizeof(unsigned char)); i++) {
 172
 173                 if (pRSN->len >= 8+i*4+4) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*i)
 174                     if ( !memcmp(pbyOUI, abyOUIGK, 4)) {
 175                         pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_USE_GROUP;
 176                         bUseGK = true;
 177                     } else if ( !memcmp(pbyOUI, abyOUIWEP40, 4)) {
 178                         // Invialid CSS, continue to parsing
 179                     } else if ( !memcmp(pbyOUI, abyOUITKIP, 4)) {
 180                         if (pBSSNode->byCSSGK != WLAN_11i_CSS_CCMP)
 181                             pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_TKIP;
 182                         else
 183                             ; // Invialid CSS, continue to parsing
 184                     } else if ( !memcmp(pbyOUI, abyOUICCMP, 4)) {
 185                         pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_CCMP;
 186                     } else if ( !memcmp(pbyOUI, abyOUIWEP104, 4)) {
 187                         // Invialid CSS, continue to parsing
 188                     } else {
 189                         // any vendor checks here
 190                         pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_UNKNOWN;
 191                     }
 192                     pbyOUI += 4;
 193                     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"abyCSSPK[%d]: %X\n", j-1, pBSSNode->abyCSSPK[j-1]);
 194                 } else
 195                     break;
 196             } //for
 197
 198             if (bUseGK == true) {
 199                 if (j != 1) {
 200                     // invalid CSS, This should be only PK CSS.
 201                     return;
 202                 }
 203                 if (pBSSNode->byCSSGK == WLAN_11i_CSS_CCMP) {
 204                     // invalid CSS, If CCMP is enable , PK can't be CSSGK.
 205                     return;
 206                 }
 207             }
 208             if ((pBSSNode->wCSSPKCount != 0) && (j == 0)) {
 209                 // invalid CSS, No valid PK.
 210                 return;
 211             }
 212             pBSSNode->wCSSPKCount = (unsigned short)j;
 213             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wCSSPKCount: %d\n", pBSSNode->wCSSPKCount);
 214         }
 215
 216         m = *((unsigned short *) &(pRSN->abyRSN[4]));
 217
 218         if (pRSN->len >= 10+m*4) { // ver(2) + GK(4) + PK count(2) + PKS(4*m) + AKMSS count(2)
 219             pBSSNode->wAKMSSAuthCount = *((unsigned short *) &(pRSN->abyRSN[6+4*m]));
 220             j = 0;
 221             pbyOUI = &(pRSN->abyRSN[8+4*m]);
 222             for (i = 0; (i < pBSSNode->wAKMSSAuthCount) && (j < sizeof(pBSSNode->abyAKMSSAuthType)/sizeof(unsigned char)); i++) {
 223                 if (pRSN->len >= 10+(m+i)*4+4) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*m)+AKMSS(2)+AKS(4*i)
 224                     if ( !memcmp(pbyOUI, abyOUI8021X, 4))
 225                         pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_802_1X;
 226                     else if ( !memcmp(pbyOUI, abyOUIPSK, 4))
 227                         pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_PSK;
 228                     else
 229                         // any vendor checks here
 230                         pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_UNKNOWN;
 231                     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"abyAKMSSAuthType[%d]: %X\n", j-1, pBSSNode->abyAKMSSAuthType[j-1]);
 232                 } else
 233                     break;
 234             }
 235             pBSSNode->wAKMSSAuthCount = (unsigned short)j;
 236             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAKMSSAuthCount: %d\n", pBSSNode->wAKMSSAuthCount);
 237
 238             n = *((unsigned short *) &(pRSN->abyRSN[6+4*m]));
 239             if (pRSN->len >= 12+4*m+4*n) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*m)+AKMSSCnt(2)+AKMSS(4*n)+Cap(2)
 240                 pBSSNode->sRSNCapObj.bRSNCapExist = true;
 241                 pBSSNode->sRSNCapObj.wRSNCap = *((unsigned short *) &(pRSN->abyRSN[8+4*m+4*n]));
 242             }
 243         }
 244         //ignore PMKID lists bcs only (Re)Assocrequest has this field
 245         pBSSNode->bWPA2Valid = true;
 246     }
 247 }
 248
 249
 250 /*+
 251  *
 252  * Description:
 253  *    Set WPA IEs
 254  *
 255  * Parameters:
 256  *  In:
 257  *      pMgmtHandle - Pointer to management object
 258  *  Out:
 259  *      pRSNIEs     - Pointer to the RSN IE to set.
 260  *
 261  * Return Value: length of IEs.
 262  *
 263 -*/
 264 unsigned int
 265 WPA2uSetIEs(
 266     void *pMgmtHandle,
 267     PWLAN_IE_RSN pRSNIEs
 268     )
 269 {
 270     PSMgmtObject    pMgmt = (PSMgmtObject) pMgmtHandle;
 271     unsigned char *pbyBuffer = NULL;
 272     unsigned int ii = 0;
 273     unsigned short *pwPMKID = NULL;
 274
 275     if (pRSNIEs == NULL) {
 276         return(0);
 277     }
 278     if (((pMgmt->eAuthenMode == WMAC_AUTH_WPA2) ||
 279          (pMgmt->eAuthenMode == WMAC_AUTH_WPA2PSK)) &&
 280         (pMgmt->pCurrBSS != NULL)) {
 281         /* WPA2 IE */
 282         pbyBuffer = (unsigned char *) pRSNIEs;
 283         pRSNIEs->byElementID = WLAN_EID_RSN;
 284         pRSNIEs->len = 6; //Version(2)+GK(4)
 285         pRSNIEs->wVersion = 1;
 286         //Group Key Cipher Suite
 287         pRSNIEs->abyRSN[0] = 0x00;
 288         pRSNIEs->abyRSN[1] = 0x0F;
 289         pRSNIEs->abyRSN[2] = 0xAC;
 290         if (pMgmt->byCSSGK == KEY_CTL_WEP) {
 291             pRSNIEs->abyRSN[3] = pMgmt->pCurrBSS->byCSSGK;
 292         } else if (pMgmt->byCSSGK == KEY_CTL_TKIP) {
 293             pRSNIEs->abyRSN[3] = WLAN_11i_CSS_TKIP;
 294         } else if (pMgmt->byCSSGK == KEY_CTL_CCMP) {
 295             pRSNIEs->abyRSN[3] = WLAN_11i_CSS_CCMP;
 296         } else {
 297             pRSNIEs->abyRSN[3] = WLAN_11i_CSS_UNKNOWN;
 298         }
 299
 300         // Pairwise Key Cipher Suite
 301         pRSNIEs->abyRSN[4] = 1;
 302         pRSNIEs->abyRSN[5] = 0;
 303         pRSNIEs->abyRSN[6] = 0x00;
 304         pRSNIEs->abyRSN[7] = 0x0F;
 305         pRSNIEs->abyRSN[8] = 0xAC;
 306         if (pMgmt->byCSSPK == KEY_CTL_TKIP) {
 307             pRSNIEs->abyRSN[9] = WLAN_11i_CSS_TKIP;
 308         } else if (pMgmt->byCSSPK == KEY_CTL_CCMP) {
 309             pRSNIEs->abyRSN[9] = WLAN_11i_CSS_CCMP;
 310         } else if (pMgmt->byCSSPK == KEY_CTL_NONE) {
 311             pRSNIEs->abyRSN[9] = WLAN_11i_CSS_USE_GROUP;
 312         } else {
 313             pRSNIEs->abyRSN[9] = WLAN_11i_CSS_UNKNOWN;
 314         }
 315         pRSNIEs->len += 6;
 316
 317         // Auth Key Management Suite
 318         pRSNIEs->abyRSN[10] = 1;
 319         pRSNIEs->abyRSN[11] = 0;
 320         pRSNIEs->abyRSN[12] = 0x00;
 321         pRSNIEs->abyRSN[13] = 0x0F;
 322         pRSNIEs->abyRSN[14] = 0xAC;
 323         if (pMgmt->eAuthenMode == WMAC_AUTH_WPA2PSK) {
 324             pRSNIEs->abyRSN[15] = WLAN_11i_AKMSS_PSK;
 325         } else if (pMgmt->eAuthenMode == WMAC_AUTH_WPA2) {
 326             pRSNIEs->abyRSN[15] = WLAN_11i_AKMSS_802_1X;
 327         } else {
 328             pRSNIEs->abyRSN[15] = WLAN_11i_AKMSS_UNKNOWN;
 329         }
 330         pRSNIEs->len +=6;
 331
 332         // RSN Capabilites
 333         if (pMgmt->pCurrBSS->sRSNCapObj.bRSNCapExist == true) {
 334             memcpy(&pRSNIEs->abyRSN[16], &pMgmt->pCurrBSS->sRSNCapObj.wRSNCap, 2);
 335         } else {
 336             pRSNIEs->abyRSN[16] = 0;
 337             pRSNIEs->abyRSN[17] = 0;
 338         }
 339         pRSNIEs->len +=2;
 340
 341         if ((pMgmt->gsPMKIDCache.BSSIDInfoCount > 0) &&
 342             (pMgmt->bRoaming == true) &&
 343             (pMgmt->eAuthenMode == WMAC_AUTH_WPA2)) {
 344             // RSN PMKID
 345             pwPMKID = (unsigned short *)(&pRSNIEs->abyRSN[18]);  // Point to PMKID count
 346             *pwPMKID = 0;                               // Initialize PMKID count
 347             pbyBuffer = &pRSNIEs->abyRSN[20];           // Point to PMKID list
 348             for (ii = 0; ii < pMgmt->gsPMKIDCache.BSSIDInfoCount; ii++) {
 349                 if ( !memcmp(&pMgmt->gsPMKIDCache.BSSIDInfo[ii].abyBSSID[0], pMgmt->abyCurrBSSID, ETH_ALEN)) {
 350                     (*pwPMKID) ++;
 351                     memcpy(pbyBuffer, pMgmt->gsPMKIDCache.BSSIDInfo[ii].abyPMKID, 16);
 352                     pbyBuffer += 16;
 353                 }
 354             }
 355             if (*pwPMKID != 0) {
 356                 pRSNIEs->len += (2 + (*pwPMKID)*16);
 357             } else {
 358                 pbyBuffer = &pRSNIEs->abyRSN[18];
 359             }
 360         }
 361         return(pRSNIEs->len + WLAN_IEHDR_LEN);
 362     }
 363     return(0);
 364 }