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Merge commit '3ff195b011d7decf501a4d55aeed312731094796' into for-linus
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / staging / vt6656 / aes_ccmp.c
CommitLineData
92b96797
FB		 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: aes_ccmp.c
21 *
22 * Purpose: AES_CCMP decryption
23 *
24 * Author: Warren Hsu
25 *
26 * Date: Feb 15, 2005
27 *
28 * Functions:
29 * AESbGenCCMP - Parsing RX-packet
30 *
31 *
32 * Revision History:
33 *
34 */
35
92b96797 36#include "device.h"
92b96797 37#include "80211hdr.h"
92b96797
FB		 38
39/*--------------------- Static Definitions -------------------------*/
40
41/*--------------------- Static Classes ----------------------------*/
42
43/*--------------------- Static Variables --------------------------*/
44
45/*
46 * SBOX Table
47 */
48
49BYTE sbox_table[256] =
50{
510x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
520xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
530xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
540x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
550x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
560x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
570xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
580x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
590xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
600x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
610xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
620xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
630xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
640x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
650xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
660x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
67};
68
69BYTE dot2_table[256] = {
700x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
710x20, 0x22, 0x24, 0x26, 0x28, 0x2a, 0x2c, 0x2e, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e,
720x40, 0x42, 0x44, 0x46, 0x48, 0x4a, 0x4c, 0x4e, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e,
730x60, 0x62, 0x64, 0x66, 0x68, 0x6a, 0x6c, 0x6e, 0x70, 0x72, 0x74, 0x76, 0x78, 0x7a, 0x7c, 0x7e,
740x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c, 0x8e, 0x90, 0x92, 0x94, 0x96, 0x98, 0x9a, 0x9c, 0x9e,
750xa0, 0xa2, 0xa4, 0xa6, 0xa8, 0xaa, 0xac, 0xae, 0xb0, 0xb2, 0xb4, 0xb6, 0xb8, 0xba, 0xbc, 0xbe,
760xc0, 0xc2, 0xc4, 0xc6, 0xc8, 0xca, 0xcc, 0xce, 0xd0, 0xd2, 0xd4, 0xd6, 0xd8, 0xda, 0xdc, 0xde,
770xe0, 0xe2, 0xe4, 0xe6, 0xe8, 0xea, 0xec, 0xee, 0xf0, 0xf2, 0xf4, 0xf6, 0xf8, 0xfa, 0xfc, 0xfe,
780x1b, 0x19, 0x1f, 0x1d, 0x13, 0x11, 0x17, 0x15, 0x0b, 0x09, 0x0f, 0x0d, 0x03, 0x01, 0x07, 0x05,
790x3b, 0x39, 0x3f, 0x3d, 0x33, 0x31, 0x37, 0x35, 0x2b, 0x29, 0x2f, 0x2d, 0x23, 0x21, 0x27, 0x25,
800x5b, 0x59, 0x5f, 0x5d, 0x53, 0x51, 0x57, 0x55, 0x4b, 0x49, 0x4f, 0x4d, 0x43, 0x41, 0x47, 0x45,
810x7b, 0x79, 0x7f, 0x7d, 0x73, 0x71, 0x77, 0x75, 0x6b, 0x69, 0x6f, 0x6d, 0x63, 0x61, 0x67, 0x65,
820x9b, 0x99, 0x9f, 0x9d, 0x93, 0x91, 0x97, 0x95, 0x8b, 0x89, 0x8f, 0x8d, 0x83, 0x81, 0x87, 0x85,
830xbb, 0xb9, 0xbf, 0xbd, 0xb3, 0xb1, 0xb7, 0xb5, 0xab, 0xa9, 0xaf, 0xad, 0xa3, 0xa1, 0xa7, 0xa5,
840xdb, 0xd9, 0xdf, 0xdd, 0xd3, 0xd1, 0xd7, 0xd5, 0xcb, 0xc9, 0xcf, 0xcd, 0xc3, 0xc1, 0xc7, 0xc5,
850xfb, 0xf9, 0xff, 0xfd, 0xf3, 0xf1, 0xf7, 0xf5, 0xeb, 0xe9, 0xef, 0xed, 0xe3, 0xe1, 0xe7, 0xe5
86};
87
88BYTE dot3_table[256] = {
890x00, 0x03, 0x06, 0x05, 0x0c, 0x0f, 0x0a, 0x09, 0x18, 0x1b, 0x1e, 0x1d, 0x14, 0x17, 0x12, 0x11,
900x30, 0x33, 0x36, 0x35, 0x3c, 0x3f, 0x3a, 0x39, 0x28, 0x2b, 0x2e, 0x2d, 0x24, 0x27, 0x22, 0x21,
910x60, 0x63, 0x66, 0x65, 0x6c, 0x6f, 0x6a, 0x69, 0x78, 0x7b, 0x7e, 0x7d, 0x74, 0x77, 0x72, 0x71,
920x50, 0x53, 0x56, 0x55, 0x5c, 0x5f, 0x5a, 0x59, 0x48, 0x4b, 0x4e, 0x4d, 0x44, 0x47, 0x42, 0x41,
930xc0, 0xc3, 0xc6, 0xc5, 0xcc, 0xcf, 0xca, 0xc9, 0xd8, 0xdb, 0xde, 0xdd, 0xd4, 0xd7, 0xd2, 0xd1,
940xf0, 0xf3, 0xf6, 0xf5, 0xfc, 0xff, 0xfa, 0xf9, 0xe8, 0xeb, 0xee, 0xed, 0xe4, 0xe7, 0xe2, 0xe1,
950xa0, 0xa3, 0xa6, 0xa5, 0xac, 0xaf, 0xaa, 0xa9, 0xb8, 0xbb, 0xbe, 0xbd, 0xb4, 0xb7, 0xb2, 0xb1,
960x90, 0x93, 0x96, 0x95, 0x9c, 0x9f, 0x9a, 0x99, 0x88, 0x8b, 0x8e, 0x8d, 0x84, 0x87, 0x82, 0x81,
970x9b, 0x98, 0x9d, 0x9e, 0x97, 0x94, 0x91, 0x92, 0x83, 0x80, 0x85, 0x86, 0x8f, 0x8c, 0x89, 0x8a,
980xab, 0xa8, 0xad, 0xae, 0xa7, 0xa4, 0xa1, 0xa2, 0xb3, 0xb0, 0xb5, 0xb6, 0xbf, 0xbc, 0xb9, 0xba,
990xfb, 0xf8, 0xfd, 0xfe, 0xf7, 0xf4, 0xf1, 0xf2, 0xe3, 0xe0, 0xe5, 0xe6, 0xef, 0xec, 0xe9, 0xea,
1000xcb, 0xc8, 0xcd, 0xce, 0xc7, 0xc4, 0xc1, 0xc2, 0xd3, 0xd0, 0xd5, 0xd6, 0xdf, 0xdc, 0xd9, 0xda,
1010x5b, 0x58, 0x5d, 0x5e, 0x57, 0x54, 0x51, 0x52, 0x43, 0x40, 0x45, 0x46, 0x4f, 0x4c, 0x49, 0x4a,
1020x6b, 0x68, 0x6d, 0x6e, 0x67, 0x64, 0x61, 0x62, 0x73, 0x70, 0x75, 0x76, 0x7f, 0x7c, 0x79, 0x7a,
1030x3b, 0x38, 0x3d, 0x3e, 0x37, 0x34, 0x31, 0x32, 0x23, 0x20, 0x25, 0x26, 0x2f, 0x2c, 0x29, 0x2a,
1040x0b, 0x08, 0x0d, 0x0e, 0x07, 0x04, 0x01, 0x02, 0x13, 0x10, 0x15, 0x16, 0x1f, 0x1c, 0x19, 0x1a
105};
106
107/*--------------------- Static Functions --------------------------*/
108
109/*--------------------- Export Variables --------------------------*/
110
111/*--------------------- Export Functions --------------------------*/
112
113void xor_128(BYTE *a, BYTE *b, BYTE *out)
114{
115PDWORD dwPtrA = (PDWORD) a;
116PDWORD dwPtrB = (PDWORD) b;
117PDWORD dwPtrOut =(PDWORD) out;
118
119 (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++);
120 (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++);
121 (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++);
122 (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++);
123}
124
125
126void xor_32(BYTE *a, BYTE *b, BYTE *out)
127{
128PDWORD dwPtrA = (PDWORD) a;
129PDWORD dwPtrB = (PDWORD) b;
130PDWORD dwPtrOut =(PDWORD) out;
131
132 (*dwPtrOut++) = (*dwPtrA++) ^ (*dwPtrB++);
133}
134
135void AddRoundKey(BYTE *key, int round)
136{
137BYTE sbox_key[4];
138BYTE rcon_table[10] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36};
139
140 sbox_key[0] = sbox_table[key[13]];
141 sbox_key[1] = sbox_table[key[14]];
142 sbox_key[2] = sbox_table[key[15]];
143 sbox_key[3] = sbox_table[key[12]];
144
145 key[0] = key[0] ^ rcon_table[round];
146 xor_32(&key[0], sbox_key, &key[0]);
147
148 xor_32(&key[4], &key[0], &key[4]);
149 xor_32(&key[8], &key[4], &key[8]);
150 xor_32(&key[12], &key[8], &key[12]);
151}
152
153void SubBytes(BYTE *in, BYTE *out)
154{
155int i;
156
157 for (i=0; i< 16; i++)
158 {
159 out[i] = sbox_table[in[i]];
160 }
161}
162
163void ShiftRows(BYTE *in, BYTE *out)
164{
165 out[0] = in[0];
166 out[1] = in[5];
167 out[2] = in[10];
168 out[3] = in[15];
169 out[4] = in[4];
170 out[5] = in[9];
171 out[6] = in[14];
172 out[7] = in[3];
173 out[8] = in[8];
174 out[9] = in[13];
175 out[10] = in[2];
176 out[11] = in[7];
177 out[12] = in[12];
178 out[13] = in[1];
179 out[14] = in[6];
180 out[15] = in[11];
181}
182
183void MixColumns(BYTE *in, BYTE *out)
184{
185
186 out[0] = dot2_table[in[0]] ^ dot3_table[in[1]] ^ in[2] ^ in[3];
187 out[1] = in[0] ^ dot2_table[in[1]] ^ dot3_table[in[2]] ^ in[3];
188 out[2] = in[0] ^ in[1] ^ dot2_table[in[2]] ^ dot3_table[in[3]];
189 out[3] = dot3_table[in[0]] ^ in[1] ^ in[2] ^ dot2_table[in[3]];
190}
191
192
193void AESv128(BYTE *key, BYTE *data, BYTE *ciphertext)
194{
195int i;
196int round;
197BYTE TmpdataA[16];
198BYTE TmpdataB[16];
199BYTE abyRoundKey[16];
200
201 for(i=0; i<16; i++)
202 abyRoundKey[i] = key[i];
203
204 for (round = 0; round < 11; round++)
205 {
206 if (round == 0)
207 {
208 xor_128(abyRoundKey, data, ciphertext);
209 AddRoundKey(abyRoundKey, round);
210 }
211 else if (round == 10)
212 {
213 SubBytes(ciphertext, TmpdataA);
214 ShiftRows(TmpdataA, TmpdataB);
215 xor_128(TmpdataB, abyRoundKey, ciphertext);
216 }
217 else // round 1 ~ 9
218 {
219 SubBytes(ciphertext, TmpdataA);
220 ShiftRows(TmpdataA, TmpdataB);
221 MixColumns(&TmpdataB[0], &TmpdataA[0]);
222 MixColumns(&TmpdataB[4], &TmpdataA[4]);
223 MixColumns(&TmpdataB[8], &TmpdataA[8]);
224 MixColumns(&TmpdataB[12], &TmpdataA[12]);
225 xor_128(TmpdataA, abyRoundKey, ciphertext);
226 AddRoundKey(abyRoundKey, round);
227 }
228 }
229
230}
231
232/*
233 * Description: AES decryption
234 *
235 * Parameters:
236 * In:
237 * pbyRxKey - The key used to decrypt
238 * pbyFrame - Starting address of packet header
239 * wFrameSize - Total packet size including CRC
240 * Out:
241 * none
242 *
243 * Return Value: MIC compare result
244 *
245 */
246BOOL AESbGenCCMP(PBYTE pbyRxKey, PBYTE pbyFrame, WORD wFrameSize)
247{
248BYTE abyNonce[13];
249BYTE MIC_IV[16];
250BYTE MIC_HDR1[16];
251BYTE MIC_HDR2[16];
252BYTE abyMIC[16];
253BYTE abyCTRPLD[16];
254BYTE abyTmp[16];
255BYTE abyPlainText[16];
256BYTE abyLastCipher[16];
257
258PS802_11Header pMACHeader = (PS802_11Header) pbyFrame;
259PBYTE pbyIV;
260PBYTE pbyPayload;
261WORD wHLen = 22;
262WORD wPayloadSize = wFrameSize - 8 - 8 - 4 - WLAN_HDR_ADDR3_LEN;//8 is IV, 8 is MIC, 4 is CRC
263BOOL bA4 = FALSE;
264BYTE byTmp;
265WORD wCnt;
266int ii,jj,kk;
267
268
269 pbyIV = pbyFrame + WLAN_HDR_ADDR3_LEN;
270 if ( WLAN_GET_FC_TODS(*(PWORD)pbyFrame) &&
271 WLAN_GET_FC_FROMDS(*(PWORD)pbyFrame) ) {
272 bA4 = TRUE;
273 pbyIV += 6; // 6 is 802.11 address4
274 wHLen += 6;
275 wPayloadSize -= 6;
276 }
277 pbyPayload = pbyIV + 8; //IV-length
278
279 abyNonce[0] = 0x00; //now is 0, if Qos here will be priority
3e362598 280 memcpy(&(abyNonce[1]), pMACHeader->abyAddr2, U_ETHER_ADDR_LEN);
92b96797
FB		 281 abyNonce[7] = pbyIV[7];
282 abyNonce[8] = pbyIV[6];
283 abyNonce[9] = pbyIV[5];
284 abyNonce[10] = pbyIV[4];
285 abyNonce[11] = pbyIV[1];
286 abyNonce[12] = pbyIV[0];
287
288 //MIC_IV
289 MIC_IV[0] = 0x59;
3e362598 290 memcpy(&(MIC_IV[1]), &(abyNonce[0]), 13);
92b96797
FB		 291 MIC_IV[14] = (BYTE)(wPayloadSize >> 8);
292 MIC_IV[15] = (BYTE)(wPayloadSize & 0xff);
293
294 //MIC_HDR1
295 MIC_HDR1[0] = (BYTE)(wHLen >> 8);
296 MIC_HDR1[1] = (BYTE)(wHLen & 0xff);
297 byTmp = (BYTE)(pMACHeader->wFrameCtl & 0xff);
298 MIC_HDR1[2] = byTmp & 0x8f;
299 byTmp = (BYTE)(pMACHeader->wFrameCtl >> 8);
300 byTmp &= 0x87;
301 MIC_HDR1[3] = byTmp | 0x40;
3e362598
JL		 302 memcpy(&(MIC_HDR1[4]), pMACHeader->abyAddr1, U_ETHER_ADDR_LEN);
303 memcpy(&(MIC_HDR1[10]), pMACHeader->abyAddr2, U_ETHER_ADDR_LEN);
92b96797
FB		 304
305 //MIC_HDR2
3e362598 306 memcpy(&(MIC_HDR2[0]), pMACHeader->abyAddr3, U_ETHER_ADDR_LEN);
92b96797
FB		 307 byTmp = (BYTE)(pMACHeader->wSeqCtl & 0xff);
308 MIC_HDR2[6] = byTmp & 0x0f;
309 MIC_HDR2[7] = 0;
310 if ( bA4 ) {
3e362598 311 memcpy(&(MIC_HDR2[8]), pMACHeader->abyAddr4, U_ETHER_ADDR_LEN);
92b96797
FB		 312 } else {
313 MIC_HDR2[8] = 0x00;
314 MIC_HDR2[9] = 0x00;
315 MIC_HDR2[10] = 0x00;
316 MIC_HDR2[11] = 0x00;
317 MIC_HDR2[12] = 0x00;
318 MIC_HDR2[13] = 0x00;
319 }
320 MIC_HDR2[14] = 0x00;
321 MIC_HDR2[15] = 0x00;
322
323 //CCMP
324 AESv128(pbyRxKey,MIC_IV,abyMIC);
325 for ( kk=0; kk<16; kk++ ) {
326 abyTmp[kk] = MIC_HDR1[kk] ^ abyMIC[kk];
327 }
328 AESv128(pbyRxKey,abyTmp,abyMIC);
329 for ( kk=0; kk<16; kk++ ) {
330 abyTmp[kk] = MIC_HDR2[kk] ^ abyMIC[kk];
331 }
332 AESv128(pbyRxKey,abyTmp,abyMIC);
333
334 wCnt = 1;
335 abyCTRPLD[0] = 0x01;
3e362598 336 memcpy(&(abyCTRPLD[1]), &(abyNonce[0]), 13);
92b96797
FB		 337
338 for(jj=wPayloadSize; jj>16; jj=jj-16) {
339
340 abyCTRPLD[14] = (BYTE) (wCnt >> 8);
341 abyCTRPLD[15] = (BYTE) (wCnt & 0xff);
342
343 AESv128(pbyRxKey,abyCTRPLD,abyTmp);
344
345 for ( kk=0; kk<16; kk++ ) {
346 abyPlainText[kk] = abyTmp[kk] ^ pbyPayload[kk];
347 }
348 for ( kk=0; kk<16; kk++ ) {
349 abyTmp[kk] = abyMIC[kk] ^ abyPlainText[kk];
350 }
351 AESv128(pbyRxKey,abyTmp,abyMIC);
352
3e362598 353 memcpy(pbyPayload, abyPlainText, 16);
92b96797
FB		 354 wCnt++;
355 pbyPayload += 16;
356 } //for wPayloadSize
357
358 //last payload
3e362598 359 memcpy(&(abyLastCipher[0]), pbyPayload, jj);
92b96797
FB		 360 for ( ii=jj; ii<16; ii++ ) {
361 abyLastCipher[ii] = 0x00;
362 }
363
364 abyCTRPLD[14] = (BYTE) (wCnt >> 8);
365 abyCTRPLD[15] = (BYTE) (wCnt & 0xff);
366
367 AESv128(pbyRxKey,abyCTRPLD,abyTmp);
368 for ( kk=0; kk<16; kk++ ) {
369 abyPlainText[kk] = abyTmp[kk] ^ abyLastCipher[kk];
370 }
3e362598 371 memcpy(pbyPayload, abyPlainText, jj);
92b96797
FB		 372 pbyPayload += jj;
373
374 //for MIC calculation
375 for ( ii=jj; ii<16; ii++ ) {
376 abyPlainText[ii] = 0x00;
377 }
378 for ( kk=0; kk<16; kk++ ) {
379 abyTmp[kk] = abyMIC[kk] ^ abyPlainText[kk];
380 }
381 AESv128(pbyRxKey,abyTmp,abyMIC);
382
383 //=>above is the calculate MIC
384 //--------------------------------------------
385
386 wCnt = 0;
387 abyCTRPLD[14] = (BYTE) (wCnt >> 8);
388 abyCTRPLD[15] = (BYTE) (wCnt & 0xff);
389 AESv128(pbyRxKey,abyCTRPLD,abyTmp);
390 for ( kk=0; kk<8; kk++ ) {
391 abyTmp[kk] = abyTmp[kk] ^ pbyPayload[kk];
392 }
393 //=>above is the dec-MIC from packet
394 //--------------------------------------------
395
3e362598 396 if ( !memcmp(abyMIC,abyTmp,8) ) {
92b96797
FB		 397 return TRUE;
398 } else {
399 return FALSE;
400 }
401
402}
kernel source for telekom puls (alcatel/mediatek)