| /* |
| * 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: aes_ccmp.c |
| * |
| * Purpose: AES_CCMP decryption |
| * |
| * Author: Warren Hsu |
| * |
| * Date: Feb 15, 2005 |
| * |
| * Functions: |
| * AESbGenCCMP - Parsing RX-packet |
| * |
| * |
| * Revision History: |
| * |
| */ |
| |
| #include "device.h" |
| #include "80211hdr.h" |
| |
| /*--------------------- Static Definitions -------------------------*/ |
| |
| /*--------------------- Static Classes ----------------------------*/ |
| |
| /*--------------------- Static Variables --------------------------*/ |
| |
| /* |
| * SBOX Table |
| */ |
| |
| BYTE sbox_table[256] = |
| { |
| 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, |
| 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, |
| 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, |
| 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, |
| 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, |
| 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, |
| 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, |
| 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, |
| 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, |
| 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, |
| 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, |
| 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, |
| 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, |
| 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, |
| 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, |
| 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 |
| }; |
| |
| BYTE dot2_table[256] = { |
| 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e, |
| 0x20, 0x22, 0x24, 0x26, 0x28, 0x2a, 0x2c, 0x2e, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e, |
| 0x40, 0x42, 0x44, 0x46, 0x48, 0x4a, 0x4c, 0x4e, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, |
| 0x60, 0x62, 0x64, 0x66, 0x68, 0x6a, 0x6c, 0x6e, 0x70, 0x72, 0x74, 0x76, 0x78, 0x7a, 0x7c, 0x7e, |
| 0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c, 0x8e, 0x90, 0x92, 0x94, 0x96, 0x98, 0x9a, 0x9c, 0x9e, |
| 0xa0, 0xa2, 0xa4, 0xa6, 0xa8, 0xaa, 0xac, 0xae, 0xb0, 0xb2, 0xb4, 0xb6, 0xb8, 0xba, 0xbc, 0xbe, |
| 0xc0, 0xc2, 0xc4, 0xc6, 0xc8, 0xca, 0xcc, 0xce, 0xd0, 0xd2, 0xd4, 0xd6, 0xd8, 0xda, 0xdc, 0xde, |
| 0xe0, 0xe2, 0xe4, 0xe6, 0xe8, 0xea, 0xec, 0xee, 0xf0, 0xf2, 0xf4, 0xf6, 0xf8, 0xfa, 0xfc, 0xfe, |
| 0x1b, 0x19, 0x1f, 0x1d, 0x13, 0x11, 0x17, 0x15, 0x0b, 0x09, 0x0f, 0x0d, 0x03, 0x01, 0x07, 0x05, |
| 0x3b, 0x39, 0x3f, 0x3d, 0x33, 0x31, 0x37, 0x35, 0x2b, 0x29, 0x2f, 0x2d, 0x23, 0x21, 0x27, 0x25, |
| 0x5b, 0x59, 0x5f, 0x5d, 0x53, 0x51, 0x57, 0x55, 0x4b, 0x49, 0x4f, 0x4d, 0x43, 0x41, 0x47, 0x45, |
| 0x7b, 0x79, 0x7f, 0x7d, 0x73, 0x71, 0x77, 0x75, 0x6b, 0x69, 0x6f, 0x6d, 0x63, 0x61, 0x67, 0x65, |
| 0x9b, 0x99, 0x9f, 0x9d, 0x93, 0x91, 0x97, 0x95, 0x8b, 0x89, 0x8f, 0x8d, 0x83, 0x81, 0x87, 0x85, |
| 0xbb, 0xb9, 0xbf, 0xbd, 0xb3, 0xb1, 0xb7, 0xb5, 0xab, 0xa9, 0xaf, 0xad, 0xa3, 0xa1, 0xa7, 0xa5, |
| 0xdb, 0xd9, 0xdf, 0xdd, 0xd3, 0xd1, 0xd7, 0xd5, 0xcb, 0xc9, 0xcf, 0xcd, 0xc3, 0xc1, 0xc7, 0xc5, |
| 0xfb, 0xf9, 0xff, 0xfd, 0xf3, 0xf1, 0xf7, 0xf5, 0xeb, 0xe9, 0xef, 0xed, 0xe3, 0xe1, 0xe7, 0xe5 |
| }; |
| |
| BYTE dot3_table[256] = { |
| 0x00, 0x03, 0x06, 0x05, 0x0c, 0x0f, 0x0a, 0x09, 0x18, 0x1b, 0x1e, 0x1d, 0x14, 0x17, 0x12, 0x11, |
| 0x30, 0x33, 0x36, 0x35, 0x3c, 0x3f, 0x3a, 0x39, 0x28, 0x2b, 0x2e, 0x2d, 0x24, 0x27, 0x22, 0x21, |
| 0x60, 0x63, 0x66, 0x65, 0x6c, 0x6f, 0x6a, 0x69, 0x78, 0x7b, 0x7e, 0x7d, 0x74, 0x77, 0x72, 0x71, |
| 0x50, 0x53, 0x56, 0x55, 0x5c, 0x5f, 0x5a, 0x59, 0x48, 0x4b, 0x4e, 0x4d, 0x44, 0x47, 0x42, 0x41, |
| 0xc0, 0xc3, 0xc6, 0xc5, 0xcc, 0xcf, 0xca, 0xc9, 0xd8, 0xdb, 0xde, 0xdd, 0xd4, 0xd7, 0xd2, 0xd1, |
| 0xf0, 0xf3, 0xf6, 0xf5, 0xfc, 0xff, 0xfa, 0xf9, 0xe8, 0xeb, 0xee, 0xed, 0xe4, 0xe7, 0xe2, 0xe1, |
| 0xa0, 0xa3, 0xa6, 0xa5, 0xac, 0xaf, 0xaa, 0xa9, 0xb8, 0xbb, 0xbe, 0xbd, 0xb4, 0xb7, 0xb2, 0xb1, |
| 0x90, 0x93, 0x96, 0x95, 0x9c, 0x9f, 0x9a, 0x99, 0x88, 0x8b, 0x8e, 0x8d, 0x84, 0x87, 0x82, 0x81, |
| 0x9b, 0x98, 0x9d, 0x9e, 0x97, 0x94, 0x91, 0x92, 0x83, 0x80, 0x85, 0x86, 0x8f, 0x8c, 0x89, 0x8a, |
| 0xab, 0xa8, 0xad, 0xae, 0xa7, 0xa4, 0xa1, 0xa2, 0xb3, 0xb0, 0xb5, 0xb6, 0xbf, 0xbc, 0xb9, 0xba, |
| 0xfb, 0xf8, 0xfd, 0xfe, 0xf7, 0xf4, 0xf1, 0xf2, 0xe3, 0xe0, 0xe5, 0xe6, 0xef, 0xec, 0xe9, 0xea, |
| 0xcb, 0xc8, 0xcd, 0xce, 0xc7, 0xc4, 0xc1, 0xc2, 0xd3, 0xd0, 0xd5, 0xd6, 0xdf, 0xdc, 0xd9, 0xda, |
| 0x5b, 0x58, 0x5d, 0x5e, 0x57, 0x54, 0x51, 0x52, 0x43, 0x40, 0x45, 0x46, 0x4f, 0x4c, 0x49, 0x4a, |
| 0x6b, 0x68, 0x6d, 0x6e, 0x67, 0x64, 0x61, 0x62, 0x73, 0x70, 0x75, 0x76, 0x7f, 0x7c, 0x79, 0x7a, |
| 0x3b, 0x38, 0x3d, 0x3e, 0x37, 0x34, 0x31, 0x32, 0x23, 0x20, 0x25, 0x26, 0x2f, 0x2c, 0x29, 0x2a, |
| 0x0b, 0x08, 0x0d, 0x0e, 0x07, 0x04, 0x01, 0x02, 0x13, 0x10, 0x15, 0x16, 0x1f, 0x1c, 0x19, 0x1a |
| }; |
| |
| /*--------------------- Static Functions --------------------------*/ |
| |
| /*--------------------- Export Variables --------------------------*/ |
| |
| /*--------------------- Export Functions --------------------------*/ |
| |
| void xor_128(BYTE *a, BYTE *b, BYTE *out) |
| { |
| PDWORD dwPtrA = (PDWORD) a; |
| PDWORD dwPtrB = (PDWORD) b; |
| PDWORD dwPtrOut =(PDWORD) out; |
| |
| (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++); |
| (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++); |
| (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++); |
| (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++); |
| } |
| |
| |
| void xor_32(BYTE *a, BYTE *b, BYTE *out) |
| { |
| PDWORD dwPtrA = (PDWORD) a; |
| PDWORD dwPtrB = (PDWORD) b; |
| PDWORD dwPtrOut =(PDWORD) out; |
| |
| (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++); |
| } |
| |
| void AddRoundKey(BYTE *key, int round) |
| { |
| BYTE sbox_key[4]; |
| BYTE rcon_table[10] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36}; |
| |
| sbox_key[0] = sbox_table[key[13]]; |
| sbox_key[1] = sbox_table[key[14]]; |
| sbox_key[2] = sbox_table[key[15]]; |
| sbox_key[3] = sbox_table[key[12]]; |
| |
| key[0] = key[0] ^ rcon_table[round]; |
| xor_32(&key[0], sbox_key, &key[0]); |
| |
| xor_32(&key[4], &key[0], &key[4]); |
| xor_32(&key[8], &key[4], &key[8]); |
| xor_32(&key[12], &key[8], &key[12]); |
| } |
| |
| void SubBytes(BYTE *in, BYTE *out) |
| { |
| int i; |
| |
| for (i=0; i< 16; i++) |
| { |
| out[i] = sbox_table[in[i]]; |
| } |
| } |
| |
| void ShiftRows(BYTE *in, BYTE *out) |
| { |
| out[0] = in[0]; |
| out[1] = in[5]; |
| out[2] = in[10]; |
| out[3] = in[15]; |
| out[4] = in[4]; |
| out[5] = in[9]; |
| out[6] = in[14]; |
| out[7] = in[3]; |
| out[8] = in[8]; |
| out[9] = in[13]; |
| out[10] = in[2]; |
| out[11] = in[7]; |
| out[12] = in[12]; |
| out[13] = in[1]; |
| out[14] = in[6]; |
| out[15] = in[11]; |
| } |
| |
| void MixColumns(BYTE *in, BYTE *out) |
| { |
| |
| out[0] = dot2_table[in[0]] ^ dot3_table[in[1]] ^ in[2] ^ in[3]; |
| out[1] = in[0] ^ dot2_table[in[1]] ^ dot3_table[in[2]] ^ in[3]; |
| out[2] = in[0] ^ in[1] ^ dot2_table[in[2]] ^ dot3_table[in[3]]; |
| out[3] = dot3_table[in[0]] ^ in[1] ^ in[2] ^ dot2_table[in[3]]; |
| } |
| |
| |
| void AESv128(BYTE *key, BYTE *data, BYTE *ciphertext) |
| { |
| int i; |
| int round; |
| BYTE TmpdataA[16]; |
| BYTE TmpdataB[16]; |
| BYTE abyRoundKey[16]; |
| |
| for(i=0; i<16; i++) |
| abyRoundKey[i] = key[i]; |
| |
| for (round = 0; round < 11; round++) |
| { |
| if (round == 0) |
| { |
| xor_128(abyRoundKey, data, ciphertext); |
| AddRoundKey(abyRoundKey, round); |
| } |
| else if (round == 10) |
| { |
| SubBytes(ciphertext, TmpdataA); |
| ShiftRows(TmpdataA, TmpdataB); |
| xor_128(TmpdataB, abyRoundKey, ciphertext); |
| } |
| else // round 1 ~ 9 |
| { |
| SubBytes(ciphertext, TmpdataA); |
| ShiftRows(TmpdataA, TmpdataB); |
| MixColumns(&TmpdataB[0], &TmpdataA[0]); |
| MixColumns(&TmpdataB[4], &TmpdataA[4]); |
| MixColumns(&TmpdataB[8], &TmpdataA[8]); |
| MixColumns(&TmpdataB[12], &TmpdataA[12]); |
| xor_128(TmpdataA, abyRoundKey, ciphertext); |
| AddRoundKey(abyRoundKey, round); |
| } |
| } |
| |
| } |
| |
| /* |
| * Description: AES decryption |
| * |
| * Parameters: |
| * In: |
| * pbyRxKey - The key used to decrypt |
| * pbyFrame - Starting address of packet header |
| * wFrameSize - Total packet size including CRC |
| * Out: |
| * none |
| * |
| * Return Value: MIC compare result |
| * |
| */ |
| BOOL AESbGenCCMP(PBYTE pbyRxKey, PBYTE pbyFrame, WORD wFrameSize) |
| { |
| BYTE abyNonce[13]; |
| BYTE MIC_IV[16]; |
| BYTE MIC_HDR1[16]; |
| BYTE MIC_HDR2[16]; |
| BYTE abyMIC[16]; |
| BYTE abyCTRPLD[16]; |
| BYTE abyTmp[16]; |
| BYTE abyPlainText[16]; |
| BYTE abyLastCipher[16]; |
| |
| PS802_11Header pMACHeader = (PS802_11Header) pbyFrame; |
| PBYTE pbyIV; |
| PBYTE pbyPayload; |
| WORD wHLen = 22; |
| WORD wPayloadSize = wFrameSize - 8 - 8 - 4 - WLAN_HDR_ADDR3_LEN;//8 is IV, 8 is MIC, 4 is CRC |
| BOOL bA4 = FALSE; |
| BYTE byTmp; |
| WORD wCnt; |
| int ii,jj,kk; |
| |
| |
| pbyIV = pbyFrame + WLAN_HDR_ADDR3_LEN; |
| if ( WLAN_GET_FC_TODS(*(PWORD)pbyFrame) && |
| WLAN_GET_FC_FROMDS(*(PWORD)pbyFrame) ) { |
| bA4 = TRUE; |
| pbyIV += 6; // 6 is 802.11 address4 |
| wHLen += 6; |
| wPayloadSize -= 6; |
| } |
| pbyPayload = pbyIV + 8; //IV-length |
| |
| abyNonce[0] = 0x00; //now is 0, if Qos here will be priority |
| memcpy(&(abyNonce[1]), pMACHeader->abyAddr2, ETH_ALEN); |
| abyNonce[7] = pbyIV[7]; |
| abyNonce[8] = pbyIV[6]; |
| abyNonce[9] = pbyIV[5]; |
| abyNonce[10] = pbyIV[4]; |
| abyNonce[11] = pbyIV[1]; |
| abyNonce[12] = pbyIV[0]; |
| |
| //MIC_IV |
| MIC_IV[0] = 0x59; |
| memcpy(&(MIC_IV[1]), &(abyNonce[0]), 13); |
| MIC_IV[14] = (BYTE)(wPayloadSize >> 8); |
| MIC_IV[15] = (BYTE)(wPayloadSize & 0xff); |
| |
| //MIC_HDR1 |
| MIC_HDR1[0] = (BYTE)(wHLen >> 8); |
| MIC_HDR1[1] = (BYTE)(wHLen & 0xff); |
| byTmp = (BYTE)(pMACHeader->wFrameCtl & 0xff); |
| MIC_HDR1[2] = byTmp & 0x8f; |
| byTmp = (BYTE)(pMACHeader->wFrameCtl >> 8); |
| byTmp &= 0x87; |
| MIC_HDR1[3] = byTmp | 0x40; |
| memcpy(&(MIC_HDR1[4]), pMACHeader->abyAddr1, ETH_ALEN); |
| memcpy(&(MIC_HDR1[10]), pMACHeader->abyAddr2, ETH_ALEN); |
| |
| //MIC_HDR2 |
| memcpy(&(MIC_HDR2[0]), pMACHeader->abyAddr3, ETH_ALEN); |
| byTmp = (BYTE)(pMACHeader->wSeqCtl & 0xff); |
| MIC_HDR2[6] = byTmp & 0x0f; |
| MIC_HDR2[7] = 0; |
| if ( bA4 ) { |
| memcpy(&(MIC_HDR2[8]), pMACHeader->abyAddr4, ETH_ALEN); |
| } else { |
| MIC_HDR2[8] = 0x00; |
| MIC_HDR2[9] = 0x00; |
| MIC_HDR2[10] = 0x00; |
| MIC_HDR2[11] = 0x00; |
| MIC_HDR2[12] = 0x00; |
| MIC_HDR2[13] = 0x00; |
| } |
| MIC_HDR2[14] = 0x00; |
| MIC_HDR2[15] = 0x00; |
| |
| //CCMP |
| AESv128(pbyRxKey,MIC_IV,abyMIC); |
| for ( kk=0; kk<16; kk++ ) { |
| abyTmp[kk] = MIC_HDR1[kk] ^ abyMIC[kk]; |
| } |
| AESv128(pbyRxKey,abyTmp,abyMIC); |
| for ( kk=0; kk<16; kk++ ) { |
| abyTmp[kk] = MIC_HDR2[kk] ^ abyMIC[kk]; |
| } |
| AESv128(pbyRxKey,abyTmp,abyMIC); |
| |
| wCnt = 1; |
| abyCTRPLD[0] = 0x01; |
| memcpy(&(abyCTRPLD[1]), &(abyNonce[0]), 13); |
| |
| for(jj=wPayloadSize; jj>16; jj=jj-16) { |
| |
| abyCTRPLD[14] = (BYTE) (wCnt >> 8); |
| abyCTRPLD[15] = (BYTE) (wCnt & 0xff); |
| |
| AESv128(pbyRxKey,abyCTRPLD,abyTmp); |
| |
| for ( kk=0; kk<16; kk++ ) { |
| abyPlainText[kk] = abyTmp[kk] ^ pbyPayload[kk]; |
| } |
| for ( kk=0; kk<16; kk++ ) { |
| abyTmp[kk] = abyMIC[kk] ^ abyPlainText[kk]; |
| } |
| AESv128(pbyRxKey,abyTmp,abyMIC); |
| |
| memcpy(pbyPayload, abyPlainText, 16); |
| wCnt++; |
| pbyPayload += 16; |
| } //for wPayloadSize |
| |
| //last payload |
| memcpy(&(abyLastCipher[0]), pbyPayload, jj); |
| for ( ii=jj; ii<16; ii++ ) { |
| abyLastCipher[ii] = 0x00; |
| } |
| |
| abyCTRPLD[14] = (BYTE) (wCnt >> 8); |
| abyCTRPLD[15] = (BYTE) (wCnt & 0xff); |
| |
| AESv128(pbyRxKey,abyCTRPLD,abyTmp); |
| for ( kk=0; kk<16; kk++ ) { |
| abyPlainText[kk] = abyTmp[kk] ^ abyLastCipher[kk]; |
| } |
| memcpy(pbyPayload, abyPlainText, jj); |
| pbyPayload += jj; |
| |
| //for MIC calculation |
| for ( ii=jj; ii<16; ii++ ) { |
| abyPlainText[ii] = 0x00; |
| } |
| for ( kk=0; kk<16; kk++ ) { |
| abyTmp[kk] = abyMIC[kk] ^ abyPlainText[kk]; |
| } |
| AESv128(pbyRxKey,abyTmp,abyMIC); |
| |
| //=>above is the calculate MIC |
| //-------------------------------------------- |
| |
| wCnt = 0; |
| abyCTRPLD[14] = (BYTE) (wCnt >> 8); |
| abyCTRPLD[15] = (BYTE) (wCnt & 0xff); |
| AESv128(pbyRxKey,abyCTRPLD,abyTmp); |
| for ( kk=0; kk<8; kk++ ) { |
| abyTmp[kk] = abyTmp[kk] ^ pbyPayload[kk]; |
| } |
| //=>above is the dec-MIC from packet |
| //-------------------------------------------- |
| |
| if ( !memcmp(abyMIC,abyTmp,8) ) { |
| return TRUE; |
| } else { |
| return FALSE; |
| } |
| |
| } |