| /* |
| * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc. |
| * All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * |
| * File: wpa2.c |
| * |
| * Purpose: Handles the Basic Service Set & Node Database functions |
| * |
| * Functions: |
| * |
| * Revision History: |
| * |
| * Author: Yiching Chen |
| * |
| * Date: Oct. 4, 2004 |
| * |
| */ |
| |
| #include "device.h" |
| #include "wpa2.h" |
| |
| static int msglevel =MSG_LEVEL_INFO; |
| //static int msglevel =MSG_LEVEL_DEBUG; |
| |
| const u8 abyOUIGK[4] = { 0x00, 0x0F, 0xAC, 0x00 }; |
| const u8 abyOUIWEP40[4] = { 0x00, 0x0F, 0xAC, 0x01 }; |
| const u8 abyOUIWEP104[4] = { 0x00, 0x0F, 0xAC, 0x05 }; |
| const u8 abyOUITKIP[4] = { 0x00, 0x0F, 0xAC, 0x02 }; |
| const u8 abyOUICCMP[4] = { 0x00, 0x0F, 0xAC, 0x04 }; |
| |
| const u8 abyOUI8021X[4] = { 0x00, 0x0F, 0xAC, 0x01 }; |
| const u8 abyOUIPSK[4] = { 0x00, 0x0F, 0xAC, 0x02 }; |
| |
| /*+ |
| * |
| * Description: |
| * Clear RSN information in BSSList. |
| * |
| * Parameters: |
| * In: |
| * pBSSNode - BSS list. |
| * Out: |
| * none |
| * |
| * Return Value: none. |
| * |
| -*/ |
| void |
| WPA2_ClearRSN ( |
| PKnownBSS pBSSNode |
| ) |
| { |
| int ii; |
| |
| pBSSNode->bWPA2Valid = false; |
| |
| pBSSNode->byCSSGK = WLAN_11i_CSS_CCMP; |
| for (ii=0; ii < 4; ii ++) |
| pBSSNode->abyCSSPK[ii] = WLAN_11i_CSS_CCMP; |
| pBSSNode->wCSSPKCount = 1; |
| for (ii=0; ii < 4; ii ++) |
| pBSSNode->abyAKMSSAuthType[ii] = WLAN_11i_AKMSS_802_1X; |
| pBSSNode->wAKMSSAuthCount = 1; |
| pBSSNode->sRSNCapObj.bRSNCapExist = false; |
| pBSSNode->sRSNCapObj.wRSNCap = 0; |
| } |
| |
| /*+ |
| * |
| * Description: |
| * Parse RSN IE. |
| * |
| * Parameters: |
| * In: |
| * pBSSNode - BSS list. |
| * pRSN - Pointer to the RSN IE. |
| * Out: |
| * none |
| * |
| * Return Value: none. |
| * |
| -*/ |
| void |
| WPA2vParseRSN ( |
| PKnownBSS pBSSNode, |
| PWLAN_IE_RSN pRSN |
| ) |
| { |
| int i, j; |
| u16 m = 0, n = 0; |
| u8 * pbyOUI; |
| bool bUseGK = false; |
| |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"WPA2_ParseRSN: [%d]\n", pRSN->len); |
| |
| WPA2_ClearRSN(pBSSNode); |
| |
| if (pRSN->len == 2) { // ver(2) |
| if ((pRSN->byElementID == WLAN_EID_RSN) && (pRSN->wVersion == 1)) { |
| pBSSNode->bWPA2Valid = true; |
| } |
| return; |
| } |
| |
| if (pRSN->len < 6) { // ver(2) + GK(4) |
| // invalid CSS, P802.11i/D10.0, p31 |
| return; |
| } |
| |
| // information element header makes sense |
| if ((pRSN->byElementID == WLAN_EID_RSN) && |
| (pRSN->wVersion == 1)) { |
| |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Legal 802.11i RSN\n"); |
| |
| pbyOUI = &(pRSN->abyRSN[0]); |
| if ( !memcmp(pbyOUI, abyOUIWEP40, 4)) |
| pBSSNode->byCSSGK = WLAN_11i_CSS_WEP40; |
| else if ( !memcmp(pbyOUI, abyOUITKIP, 4)) |
| pBSSNode->byCSSGK = WLAN_11i_CSS_TKIP; |
| else if ( !memcmp(pbyOUI, abyOUICCMP, 4)) |
| pBSSNode->byCSSGK = WLAN_11i_CSS_CCMP; |
| else if ( !memcmp(pbyOUI, abyOUIWEP104, 4)) |
| pBSSNode->byCSSGK = WLAN_11i_CSS_WEP104; |
| else if ( !memcmp(pbyOUI, abyOUIGK, 4)) { |
| // invalid CSS, P802.11i/D10.0, p32 |
| return; |
| } else |
| // any vendor checks here |
| pBSSNode->byCSSGK = WLAN_11i_CSS_UNKNOWN; |
| |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"802.11i CSS: %X\n", pBSSNode->byCSSGK); |
| |
| if (pRSN->len == 6) { |
| pBSSNode->bWPA2Valid = true; |
| return; |
| } |
| |
| if (pRSN->len >= 8) { // ver(2) + GK(4) + PK count(2) |
| pBSSNode->wCSSPKCount = *((u16 *) &(pRSN->abyRSN[4])); |
| j = 0; |
| pbyOUI = &(pRSN->abyRSN[6]); |
| |
| for (i = 0; (i < pBSSNode->wCSSPKCount) && (j < sizeof(pBSSNode->abyCSSPK)/sizeof(u8)); i++) { |
| |
| if (pRSN->len >= 8+i*4+4) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*i) |
| if ( !memcmp(pbyOUI, abyOUIGK, 4)) { |
| pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_USE_GROUP; |
| bUseGK = true; |
| } else if ( !memcmp(pbyOUI, abyOUIWEP40, 4)) { |
| // Invalid CSS, continue parsing |
| } else if ( !memcmp(pbyOUI, abyOUITKIP, 4)) { |
| if (pBSSNode->byCSSGK != WLAN_11i_CSS_CCMP) |
| pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_TKIP; |
| else |
| ; // Invalid CSS, continue parsing |
| } else if ( !memcmp(pbyOUI, abyOUICCMP, 4)) { |
| pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_CCMP; |
| } else if ( !memcmp(pbyOUI, abyOUIWEP104, 4)) { |
| // Invalid CSS, continue parsing |
| } else { |
| // any vendor checks here |
| pBSSNode->abyCSSPK[j++] = WLAN_11i_CSS_UNKNOWN; |
| } |
| pbyOUI += 4; |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"abyCSSPK[%d]: %X\n", j-1, pBSSNode->abyCSSPK[j-1]); |
| } else |
| break; |
| } //for |
| |
| if (bUseGK == true) { |
| if (j != 1) { |
| // invalid CSS, This should be only PK CSS. |
| return; |
| } |
| if (pBSSNode->byCSSGK == WLAN_11i_CSS_CCMP) { |
| // invalid CSS, If CCMP is enable , PK can't be CSSGK. |
| return; |
| } |
| } |
| if ((pBSSNode->wCSSPKCount != 0) && (j == 0)) { |
| // invalid CSS, No valid PK. |
| return; |
| } |
| pBSSNode->wCSSPKCount = (u16)j; |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wCSSPKCount: %d\n", pBSSNode->wCSSPKCount); |
| } |
| |
| m = *((u16 *) &(pRSN->abyRSN[4])); |
| |
| if (pRSN->len >= 10+m*4) { // ver(2) + GK(4) + PK count(2) + PKS(4*m) + AKMSS count(2) |
| pBSSNode->wAKMSSAuthCount = *((u16 *) &(pRSN->abyRSN[6+4*m])); |
| j = 0; |
| pbyOUI = &(pRSN->abyRSN[8+4*m]); |
| for (i = 0; (i < pBSSNode->wAKMSSAuthCount) && (j < sizeof(pBSSNode->abyAKMSSAuthType)/sizeof(u8)); i++) { |
| if (pRSN->len >= 10+(m+i)*4+4) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*m)+AKMSS(2)+AKS(4*i) |
| if ( !memcmp(pbyOUI, abyOUI8021X, 4)) |
| pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_802_1X; |
| else if ( !memcmp(pbyOUI, abyOUIPSK, 4)) |
| pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_PSK; |
| else |
| // any vendor checks here |
| pBSSNode->abyAKMSSAuthType[j++] = WLAN_11i_AKMSS_UNKNOWN; |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"abyAKMSSAuthType[%d]: %X\n", j-1, pBSSNode->abyAKMSSAuthType[j-1]); |
| } else |
| break; |
| } |
| pBSSNode->wAKMSSAuthCount = (u16)j; |
| DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"wAKMSSAuthCount: %d\n", pBSSNode->wAKMSSAuthCount); |
| |
| n = *((u16 *) &(pRSN->abyRSN[6+4*m])); |
| if (pRSN->len >= 12+4*m+4*n) { // ver(2)+GK(4)+PKCnt(2)+PKS(4*m)+AKMSSCnt(2)+AKMSS(4*n)+Cap(2) |
| pBSSNode->sRSNCapObj.bRSNCapExist = true; |
| pBSSNode->sRSNCapObj.wRSNCap = *((u16 *) &(pRSN->abyRSN[8+4*m+4*n])); |
| } |
| } |
| //ignore PMKID lists bcs only (Re)Assocrequest has this field |
| pBSSNode->bWPA2Valid = true; |
| } |
| } |
