diff options
author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-22 19:54:53 (GMT) |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-22 20:01:40 (GMT) |
commit | ae19ffbadc1b2100285a5b5b3d0a4e0a11390904 (patch) | |
tree | 3c2086ab67398a019089a47ca3f362a4bc6db74f /drivers/staging/vt6656/aes_ccmp.c | |
parent | 34e84f39a27d059a3e6ec6e8b94aafa702e6f220 (diff) | |
parent | 9173a8ef24a6b1b8031507b35b8ffe5f85a87692 (diff) | |
download | linux-fsl-qoriq-ae19ffbadc1b2100285a5b5b3d0a4e0a11390904.tar.xz |
Merge branch 'master' into for-linus
Diffstat (limited to 'drivers/staging/vt6656/aes_ccmp.c')
-rw-r--r-- | drivers/staging/vt6656/aes_ccmp.c | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/drivers/staging/vt6656/aes_ccmp.c b/drivers/staging/vt6656/aes_ccmp.c new file mode 100644 index 0000000..401a7d2 --- /dev/null +++ b/drivers/staging/vt6656/aes_ccmp.c @@ -0,0 +1,402 @@ +/* + * 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, U_ETHER_ADDR_LEN); + 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, U_ETHER_ADDR_LEN); + memcpy(&(MIC_HDR1[10]), pMACHeader->abyAddr2, U_ETHER_ADDR_LEN); + + //MIC_HDR2 + memcpy(&(MIC_HDR2[0]), pMACHeader->abyAddr3, U_ETHER_ADDR_LEN); + byTmp = (BYTE)(pMACHeader->wSeqCtl & 0xff); + MIC_HDR2[6] = byTmp & 0x0f; + MIC_HDR2[7] = 0; + if ( bA4 ) { + memcpy(&(MIC_HDR2[8]), pMACHeader->abyAddr4, U_ETHER_ADDR_LEN); + } 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; + } + +} |