/*
 * 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: wpactl.c
 *
 * Purpose: handle wpa supplicant ioctl input/out functions
 *
 * Author: Lyndon Chen
 *
 * Date: July 28, 2006
 *
 * Functions:
 *
 * Revision History:
 *
 */

#include "wpactl.h"
#include "key.h"
#include "mac.h"
#include "device.h"
#include "wmgr.h"
#include "iocmd.h"
#include "iowpa.h"
#include "control.h"
#include "rndis.h"
#include "rf.h"

static int msglevel = MSG_LEVEL_INFO;

/*
 * Description:
 *      Set WPA algorithm & keys
 *
 * Parameters:
 *  In:
 *      pDevice -
 *      param -
 *  Out:
 *
 * Return Value:
 *
 */
int wpa_set_keys(struct vnt_private *pDevice, void *ctx)
{
	struct viawget_wpa_param *param = ctx;
	struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
	u32 dwKeyIndex = 0;
	u8 abyKey[MAX_KEY_LEN];
	u8 abySeq[MAX_KEY_LEN];
	u64 KeyRSC;
	u8 byKeyDecMode = KEY_CTL_WEP;
	int ret = 0;
	int uu;
	int ii;

	if (param->u.wpa_key.alg_name > WPA_ALG_CCMP)
		return -EINVAL;

	DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "param->u.wpa_key.alg_name = %d \n",
		param->u.wpa_key.alg_name);
	if (param->u.wpa_key.alg_name == WPA_ALG_NONE) {
		pDevice->eEncryptionStatus = Ndis802_11EncryptionDisabled;
		pDevice->bEncryptionEnable = false;
		pDevice->byKeyIndex = 0;
		pDevice->bTransmitKey = false;
		for (uu=0; uu<MAX_KEY_TABLE; uu++) {
			MACvDisableKeyEntry(pDevice, uu);
		}
		return ret;
	}

	if (param->u.wpa_key.key_len > sizeof(abyKey))
		return -EINVAL;

	memcpy(&abyKey[0], param->u.wpa_key.key, param->u.wpa_key.key_len);

	dwKeyIndex = (u32)(param->u.wpa_key.key_index);

	if (param->u.wpa_key.alg_name == WPA_ALG_WEP) {
		if (dwKeyIndex > 3) {
			return -EINVAL;
		} else {
			if (param->u.wpa_key.set_tx) {
				pDevice->byKeyIndex = (u8)dwKeyIndex;
				pDevice->bTransmitKey = true;
				dwKeyIndex |= (1 << 31);
			}
			KeybSetDefaultKey(  pDevice,
					&(pDevice->sKey),
					dwKeyIndex & ~(BIT30 | USE_KEYRSC),
					param->u.wpa_key.key_len,
					NULL,
					abyKey,
					KEY_CTL_WEP
				);

		}
		pDevice->eEncryptionStatus = Ndis802_11Encryption1Enabled;
		pDevice->bEncryptionEnable = true;
		return ret;
	}

	if (param->u.wpa_key.seq && param->u.wpa_key.seq_len > sizeof(abySeq))
		return -EINVAL;

	memcpy(&abySeq[0], param->u.wpa_key.seq, param->u.wpa_key.seq_len);

	if (param->u.wpa_key.seq_len > 0) {
		for (ii = 0 ; ii < param->u.wpa_key.seq_len ; ii++) {
			if (ii < 4)
				KeyRSC |= (abySeq[ii] << (ii * 8));
			else
				KeyRSC |= (abySeq[ii] << ((ii-4) * 8));
		}
		dwKeyIndex |= 1 << 29;
	}

	if (param->u.wpa_key.key_index >= MAX_GROUP_KEY) {
		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "return  dwKeyIndex > 3\n");
		return -EINVAL;
	}

	if (param->u.wpa_key.alg_name == WPA_ALG_TKIP) {
		pDevice->eEncryptionStatus = Ndis802_11Encryption2Enabled;
	}

	if (param->u.wpa_key.alg_name == WPA_ALG_CCMP) {
		pDevice->eEncryptionStatus = Ndis802_11Encryption3Enabled;
	}

	if (param->u.wpa_key.set_tx)
		dwKeyIndex |= (1 << 31);

	if (pDevice->eEncryptionStatus == Ndis802_11Encryption3Enabled)
		byKeyDecMode = KEY_CTL_CCMP;
	else if (pDevice->eEncryptionStatus == Ndis802_11Encryption2Enabled)
		byKeyDecMode = KEY_CTL_TKIP;
	else
		byKeyDecMode = KEY_CTL_WEP;

	// Fix HCT test that set 256 bits KEY and Ndis802_11Encryption3Enabled
	if (pDevice->eEncryptionStatus == Ndis802_11Encryption3Enabled) {
		if (param->u.wpa_key.key_len == MAX_KEY_LEN)
			byKeyDecMode = KEY_CTL_TKIP;
		else if (param->u.wpa_key.key_len == WLAN_WEP40_KEYLEN)
			byKeyDecMode = KEY_CTL_WEP;
		else if (param->u.wpa_key.key_len == WLAN_WEP104_KEYLEN)
			byKeyDecMode = KEY_CTL_WEP;
	} else if (pDevice->eEncryptionStatus == Ndis802_11Encryption2Enabled) {
		if (param->u.wpa_key.key_len == WLAN_WEP40_KEYLEN)
			byKeyDecMode = KEY_CTL_WEP;
		else if (param->u.wpa_key.key_len == WLAN_WEP104_KEYLEN)
			byKeyDecMode = KEY_CTL_WEP;
	}

	// Check TKIP key length
	if ((byKeyDecMode == KEY_CTL_TKIP) &&
		(param->u.wpa_key.key_len != MAX_KEY_LEN)) {
		// TKIP Key must be 256 bits
		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "return - TKIP Key must be 256 bits!\n");
		return -EINVAL;
    }
	// Check AES key length
	if ((byKeyDecMode == KEY_CTL_CCMP) &&
		(param->u.wpa_key.key_len != AES_KEY_LEN)) {
		// AES Key must be 128 bits
		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "return - AES Key must be 128 bits\n");
		return -EINVAL;
	}

	if (is_broadcast_ether_addr(&param->addr[0]) || (param->addr == NULL)) {
		/* if broadcast, set the key as every key entry's group key */
		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Groupe Key Assign.\n");

		if ((KeybSetAllGroupKey(pDevice, &(pDevice->sKey), dwKeyIndex,
							param->u.wpa_key.key_len,
							&KeyRSC,
							(u8 *)abyKey,
							byKeyDecMode
					) == true) &&
			(KeybSetDefaultKey(pDevice,
					&(pDevice->sKey),
					dwKeyIndex,
					param->u.wpa_key.key_len,
					&KeyRSC,
					(u8 *)abyKey,
					byKeyDecMode
				) == true) ) {
			DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "GROUP Key Assign.\n");
		} else {
			return -EINVAL;
		}
	} else {
		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Pairwise Key Assign.\n");
		// BSSID not 0xffffffffffff
		// Pairwise Key can't be WEP
		if (byKeyDecMode == KEY_CTL_WEP) {
			DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Pairwise Key can't be WEP\n");
			return -EINVAL;
		}
		dwKeyIndex |= (1 << 30); // set pairwise key
		if (pMgmt->eConfigMode == WMAC_CONFIG_IBSS_STA) {
			//DBG_PRN_WLAN03(("return NDIS_STATUS_INVALID_DATA - WMAC_CONFIG_IBSS_STA\n"));
			return -EINVAL;
		}
		if (KeybSetKey(pDevice, &(pDevice->sKey), &param->addr[0],
				dwKeyIndex, param->u.wpa_key.key_len,
				&KeyRSC, (u8 *)abyKey, byKeyDecMode
				) == true) {
			DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Pairwise Key Set\n");
		} else {
			// Key Table Full
			if (ether_addr_equal(param->addr, pDevice->abyBSSID)) {
				//DBG_PRN_WLAN03(("return NDIS_STATUS_INVALID_DATA -Key Table Full.2\n"));
				return -EINVAL;
			} else {
				// Save Key and configure just before associate/reassociate to BSSID
				// we do not implement now
				return -EINVAL;
			}
		}
	} // BSSID not 0xffffffffffff
	if ((ret == 0) && ((param->u.wpa_key.set_tx) != 0)) {
		pDevice->byKeyIndex = (u8)param->u.wpa_key.key_index;
		pDevice->bTransmitKey = true;
	}
	pDevice->bEncryptionEnable = true;

	return ret;
}