/
rtw_security.c
executable file
·3115 lines (2681 loc) · 91.4 KB
/
rtw_security.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/******************************************************************************
*
* Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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, USA
*
*
******************************************************************************/
#define _RTW_SECURITY_C_
#include <drv_conf.h>
#include <osdep_service.h>
#include <drv_types.h>
#include <wifi.h>
#include <osdep_intf.h>
//=====WEP related=====
#define CRC32_POLY 0x04c11db7
struct arc4context
{
u32 x;
u32 y;
u8 state[256];
};
static void arcfour_init(struct arc4context *parc4ctx, u8 * key,u32 key_len)
{
u32 t, u;
u32 keyindex;
u32 stateindex;
u8 * state;
u32 counter;
_func_enter_;
state = parc4ctx->state;
parc4ctx->x = 0;
parc4ctx->y = 0;
for (counter = 0; counter < 256; counter++)
state[counter] = (u8)counter;
keyindex = 0;
stateindex = 0;
for (counter = 0; counter < 256; counter++)
{
t = state[counter];
stateindex = (stateindex + key[keyindex] + t) & 0xff;
u = state[stateindex];
state[stateindex] = (u8)t;
state[counter] = (u8)u;
if (++keyindex >= key_len)
keyindex = 0;
}
_func_exit_;
}
static u32 arcfour_byte( struct arc4context *parc4ctx)
{
u32 x;
u32 y;
u32 sx, sy;
u8 * state;
_func_enter_;
state = parc4ctx->state;
x = (parc4ctx->x + 1) & 0xff;
sx = state[x];
y = (sx + parc4ctx->y) & 0xff;
sy = state[y];
parc4ctx->x = x;
parc4ctx->y = y;
state[y] = (u8)sx;
state[x] = (u8)sy;
_func_exit_;
return state[(sx + sy) & 0xff];
}
static void arcfour_encrypt( struct arc4context *parc4ctx,
u8 * dest,
u8 * src,
u32 len)
{
u32 i;
_func_enter_;
for (i = 0; i < len; i++)
dest[i] = src[i] ^ (unsigned char)arcfour_byte(parc4ctx);
_func_exit_;
}
static sint bcrc32initialized = 0;
static u32 crc32_table[256];
static u8 crc32_reverseBit( u8 data)
{
return( (u8)((data<<7)&0x80) | ((data<<5)&0x40) | ((data<<3)&0x20) | ((data<<1)&0x10) | ((data>>1)&0x08) | ((data>>3)&0x04) | ((data>>5)&0x02) | ((data>>7)&0x01) );
}
static void crc32_init(void)
{
_func_enter_;
if (bcrc32initialized == 1)
goto exit;
else{
sint i, j;
u32 c;
u8 *p=(u8 *)&c, *p1;
u8 k;
c = 0x12340000;
for (i = 0; i < 256; ++i)
{
k = crc32_reverseBit((u8)i);
for (c = ((u32)k) << 24, j = 8; j > 0; --j){
c = c & 0x80000000 ? (c << 1) ^ CRC32_POLY : (c << 1);
}
p1 = (u8 *)&crc32_table[i];
p1[0] = crc32_reverseBit(p[3]);
p1[1] = crc32_reverseBit(p[2]);
p1[2] = crc32_reverseBit(p[1]);
p1[3] = crc32_reverseBit(p[0]);
}
bcrc32initialized= 1;
}
exit:
_func_exit_;
}
static u32 getcrc32(u8 *buf, sint len)
{
u8 *p;
u32 crc;
_func_enter_;
if (bcrc32initialized == 0) crc32_init();
crc = 0xffffffff; /* preload shift register, per CRC-32 spec */
for (p = buf; len > 0; ++p, --len)
{
crc = crc32_table[ (crc ^ *p) & 0xff] ^ (crc >> 8);
}
_func_exit_;
return ~crc; /* transmit complement, per CRC-32 spec */
}
/*
Need to consider the fragment situation
*/
void rtw_wep_encrypt(_adapter *padapter, u8 *pxmitframe)
{ // exclude ICV
unsigned char crc[4];
struct arc4context mycontext;
sint curfragnum,length;
u32 keylength;
u8 *pframe, *payload,*iv; //,*wepkey
u8 wepkey[16];
struct pkt_attrib *pattrib = &((struct xmit_frame*)pxmitframe)->attrib;
struct security_priv *psecuritypriv=&padapter->securitypriv;
struct xmit_priv *pxmitpriv=&padapter->xmitpriv;
_func_enter_;
if(((struct xmit_frame*)pxmitframe)->buf_addr==NULL)
return;
#ifdef CONFIG_USB_TX_AGGREGATION
pframe = ((struct xmit_frame*)pxmitframe)->buf_addr + TXDESC_SIZE +
(((struct xmit_frame*)pxmitframe)->pkt_offset * PACKET_OFFSET_SZ);
#else
pframe = ((struct xmit_frame*)pxmitframe)->buf_addr + TXDESC_OFFSET;
#endif
//start to encrypt each fragment
if((pattrib->encrypt==_WEP40_)||(pattrib->encrypt==_WEP104_))
{
keylength=psecuritypriv->dot11DefKeylen[psecuritypriv->dot11PrivacyKeyIndex];
for(curfragnum=0;curfragnum<pattrib->nr_frags;curfragnum++)
{
iv=pframe+pattrib->hdrlen;
_rtw_memcpy(&wepkey[0], iv, 3);
_rtw_memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[psecuritypriv->dot11PrivacyKeyIndex].skey[0],keylength);
payload=pframe+pattrib->iv_len+pattrib->hdrlen;
if((curfragnum+1)==pattrib->nr_frags)
{ //the last fragment
length=pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len- pattrib->icv_len;
*((u32 *)crc)=cpu_to_le32(getcrc32(payload,length));
arcfour_init(&mycontext, wepkey,3+keylength);
arcfour_encrypt(&mycontext, payload, payload, length);
arcfour_encrypt(&mycontext, payload+length, crc, 4);
}
else
{
length=pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len ;
*((u32 *)crc)=cpu_to_le32(getcrc32(payload,length));
arcfour_init(&mycontext, wepkey,3+keylength);
arcfour_encrypt(&mycontext, payload, payload, length);
arcfour_encrypt(&mycontext, payload+length, crc, 4);
pframe+=pxmitpriv->frag_len;
pframe=(u8 *)RND4((SIZE_PTR)(pframe));
}
}
}
_func_exit_;
}
void rtw_wep_decrypt(_adapter *padapter, u8 *precvframe)
{
// exclude ICV
u8 crc[4];
struct arc4context mycontext;
sint length;
u32 keylength;
u8 *pframe, *payload,*iv,wepkey[16];
u8 keyindex;
struct rx_pkt_attrib *prxattrib = &(((union recv_frame*)precvframe)->u.hdr.attrib);
struct security_priv *psecuritypriv=&padapter->securitypriv;
_func_enter_;
pframe=(unsigned char *)((union recv_frame*)precvframe)->u.hdr.rx_data;
//start to decrypt recvframe
if((prxattrib->encrypt==_WEP40_)||(prxattrib->encrypt==_WEP104_))
{
iv=pframe+prxattrib->hdrlen;
//keyindex=(iv[3]&0x3);
keyindex = prxattrib->key_index;
keylength=psecuritypriv->dot11DefKeylen[keyindex];
_rtw_memcpy(&wepkey[0], iv, 3);
//_rtw_memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[psecuritypriv->dot11PrivacyKeyIndex].skey[0],keylength);
_rtw_memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[keyindex].skey[0],keylength);
length= ((union recv_frame *)precvframe)->u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len;
payload=pframe+prxattrib->iv_len+prxattrib->hdrlen;
//decrypt payload include icv
arcfour_init(&mycontext, wepkey,3+keylength);
arcfour_encrypt(&mycontext, payload, payload, length);
//calculate icv and compare the icv
*((u32 *)crc)=le32_to_cpu(getcrc32(payload,length-4));
if(crc[3]!=payload[length-1] || crc[2]!=payload[length-2] || crc[1]!=payload[length-3] || crc[0]!=payload[length-4])
{
RT_TRACE(_module_rtl871x_security_c_,_drv_err_,("rtw_wep_decrypt:icv error crc[3](%x)!=payload[length-1](%x) || crc[2](%x)!=payload[length-2](%x) || crc[1](%x)!=payload[length-3](%x) || crc[0](%x)!=payload[length-4](%x)\n",
crc[3],payload[length-1],crc[2],payload[length-2],crc[1],payload[length-3],crc[0],payload[length-4]));
}
}
_func_exit_;
return;
}
//3 =====TKIP related=====
static u32 secmicgetuint32( u8 * p )
// Convert from Byte[] to Us4Byte32 in a portable way
{
s32 i;
u32 res = 0;
_func_enter_;
for( i=0; i<4; i++ )
{
res |= ((u32)(*p++)) << (8*i);
}
_func_exit_;
return res;
}
static void secmicputuint32( u8 * p, u32 val )
// Convert from Us4Byte32 to Byte[] in a portable way
{
long i;
_func_enter_;
for( i=0; i<4; i++ )
{
*p++ = (u8) (val & 0xff);
val >>= 8;
}
_func_exit_;
}
static void secmicclear(struct mic_data *pmicdata)
{
// Reset the state to the empty message.
_func_enter_;
pmicdata->L = pmicdata->K0;
pmicdata->R = pmicdata->K1;
pmicdata->nBytesInM = 0;
pmicdata->M = 0;
_func_exit_;
}
void rtw_secmicsetkey(struct mic_data *pmicdata, u8 * key )
{
// Set the key
_func_enter_;
pmicdata->K0 = secmicgetuint32( key );
pmicdata->K1 = secmicgetuint32( key + 4 );
// and reset the message
secmicclear(pmicdata);
_func_exit_;
}
void rtw_secmicappendbyte(struct mic_data *pmicdata, u8 b )
{
_func_enter_;
// Append the byte to our word-sized buffer
pmicdata->M |= ((unsigned long)b) << (8*pmicdata->nBytesInM);
pmicdata->nBytesInM++;
// Process the word if it is full.
if( pmicdata->nBytesInM >= 4 )
{
pmicdata->L ^= pmicdata->M;
pmicdata->R ^= ROL32( pmicdata->L, 17 );
pmicdata->L += pmicdata->R;
pmicdata->R ^= ((pmicdata->L & 0xff00ff00) >> 8) | ((pmicdata->L & 0x00ff00ff) << 8);
pmicdata->L += pmicdata->R;
pmicdata->R ^= ROL32( pmicdata->L, 3 );
pmicdata->L += pmicdata->R;
pmicdata->R ^= ROR32( pmicdata->L, 2 );
pmicdata->L += pmicdata->R;
// Clear the buffer
pmicdata->M = 0;
pmicdata->nBytesInM = 0;
}
_func_exit_;
}
void rtw_secmicappend(struct mic_data *pmicdata, u8 * src, u32 nbytes )
{
_func_enter_;
// This is simple
while( nbytes > 0 )
{
rtw_secmicappendbyte(pmicdata, *src++ );
nbytes--;
}
_func_exit_;
}
void rtw_secgetmic(struct mic_data *pmicdata, u8 * dst )
{
_func_enter_;
// Append the minimum padding
rtw_secmicappendbyte(pmicdata, 0x5a );
rtw_secmicappendbyte(pmicdata, 0 );
rtw_secmicappendbyte(pmicdata, 0 );
rtw_secmicappendbyte(pmicdata, 0 );
rtw_secmicappendbyte(pmicdata, 0 );
// and then zeroes until the length is a multiple of 4
while( pmicdata->nBytesInM != 0 )
{
rtw_secmicappendbyte(pmicdata, 0 );
}
// The appendByte function has already computed the result.
secmicputuint32( dst, pmicdata->L );
secmicputuint32( dst+4, pmicdata->R );
// Reset to the empty message.
secmicclear(pmicdata);
_func_exit_;
}
void rtw_seccalctkipmic(u8 * key,u8 *header,u8 *data,u32 data_len,u8 *mic_code, u8 pri)
{
struct mic_data micdata;
u8 priority[4]={0x0,0x0,0x0,0x0};
_func_enter_;
rtw_secmicsetkey(&micdata, key);
priority[0]=pri;
/* Michael MIC pseudo header: DA, SA, 3 x 0, Priority */
if(header[1]&1){ //ToDS==1
rtw_secmicappend(&micdata, &header[16], 6); //DA
if(header[1]&2) //From Ds==1
rtw_secmicappend(&micdata, &header[24], 6);
else
rtw_secmicappend(&micdata, &header[10], 6);
}
else{ //ToDS==0
rtw_secmicappend(&micdata, &header[4], 6); //DA
if(header[1]&2) //From Ds==1
rtw_secmicappend(&micdata, &header[16], 6);
else
rtw_secmicappend(&micdata, &header[10], 6);
}
rtw_secmicappend(&micdata, &priority[0], 4);
rtw_secmicappend(&micdata, data, data_len);
rtw_secgetmic(&micdata,mic_code);
_func_exit_;
}
/* macros for extraction/creation of unsigned char/unsigned short values */
#define RotR1(v16) ((((v16) >> 1) & 0x7FFF) ^ (((v16) & 1) << 15))
#define Lo8(v16) ((u8)( (v16) & 0x00FF))
#define Hi8(v16) ((u8)(((v16) >> 8) & 0x00FF))
#define Lo16(v32) ((u16)( (v32) & 0xFFFF))
#define Hi16(v32) ((u16)(((v32) >>16) & 0xFFFF))
#define Mk16(hi,lo) ((lo) ^ (((u16)(hi)) << 8))
/* select the Nth 16-bit word of the temporal key unsigned char array TK[] */
#define TK16(N) Mk16(tk[2*(N)+1],tk[2*(N)])
/* S-box lookup: 16 bits --> 16 bits */
#define _S_(v16) (Sbox1[0][Lo8(v16)] ^ Sbox1[1][Hi8(v16)])
/* fixed algorithm "parameters" */
#define PHASE1_LOOP_CNT 8 /* this needs to be "big enough" */
#define TA_SIZE 6 /* 48-bit transmitter address */
#define TK_SIZE 16 /* 128-bit temporal key */
#define P1K_SIZE 10 /* 80-bit Phase1 key */
#define RC4_KEY_SIZE 16 /* 128-bit RC4KEY (104 bits unknown) */
/* 2-unsigned char by 2-unsigned char subset of the full AES S-box table */
static const unsigned short Sbox1[2][256]= /* Sbox for hash (can be in ROM) */
{ {
0xC6A5,0xF884,0xEE99,0xF68D,0xFF0D,0xD6BD,0xDEB1,0x9154,
0x6050,0x0203,0xCEA9,0x567D,0xE719,0xB562,0x4DE6,0xEC9A,
0x8F45,0x1F9D,0x8940,0xFA87,0xEF15,0xB2EB,0x8EC9,0xFB0B,
0x41EC,0xB367,0x5FFD,0x45EA,0x23BF,0x53F7,0xE496,0x9B5B,
0x75C2,0xE11C,0x3DAE,0x4C6A,0x6C5A,0x7E41,0xF502,0x834F,
0x685C,0x51F4,0xD134,0xF908,0xE293,0xAB73,0x6253,0x2A3F,
0x080C,0x9552,0x4665,0x9D5E,0x3028,0x37A1,0x0A0F,0x2FB5,
0x0E09,0x2436,0x1B9B,0xDF3D,0xCD26,0x4E69,0x7FCD,0xEA9F,
0x121B,0x1D9E,0x5874,0x342E,0x362D,0xDCB2,0xB4EE,0x5BFB,
0xA4F6,0x764D,0xB761,0x7DCE,0x527B,0xDD3E,0x5E71,0x1397,
0xA6F5,0xB968,0x0000,0xC12C,0x4060,0xE31F,0x79C8,0xB6ED,
0xD4BE,0x8D46,0x67D9,0x724B,0x94DE,0x98D4,0xB0E8,0x854A,
0xBB6B,0xC52A,0x4FE5,0xED16,0x86C5,0x9AD7,0x6655,0x1194,
0x8ACF,0xE910,0x0406,0xFE81,0xA0F0,0x7844,0x25BA,0x4BE3,
0xA2F3,0x5DFE,0x80C0,0x058A,0x3FAD,0x21BC,0x7048,0xF104,
0x63DF,0x77C1,0xAF75,0x4263,0x2030,0xE51A,0xFD0E,0xBF6D,
0x814C,0x1814,0x2635,0xC32F,0xBEE1,0x35A2,0x88CC,0x2E39,
0x9357,0x55F2,0xFC82,0x7A47,0xC8AC,0xBAE7,0x322B,0xE695,
0xC0A0,0x1998,0x9ED1,0xA37F,0x4466,0x547E,0x3BAB,0x0B83,
0x8CCA,0xC729,0x6BD3,0x283C,0xA779,0xBCE2,0x161D,0xAD76,
0xDB3B,0x6456,0x744E,0x141E,0x92DB,0x0C0A,0x486C,0xB8E4,
0x9F5D,0xBD6E,0x43EF,0xC4A6,0x39A8,0x31A4,0xD337,0xF28B,
0xD532,0x8B43,0x6E59,0xDAB7,0x018C,0xB164,0x9CD2,0x49E0,
0xD8B4,0xACFA,0xF307,0xCF25,0xCAAF,0xF48E,0x47E9,0x1018,
0x6FD5,0xF088,0x4A6F,0x5C72,0x3824,0x57F1,0x73C7,0x9751,
0xCB23,0xA17C,0xE89C,0x3E21,0x96DD,0x61DC,0x0D86,0x0F85,
0xE090,0x7C42,0x71C4,0xCCAA,0x90D8,0x0605,0xF701,0x1C12,
0xC2A3,0x6A5F,0xAEF9,0x69D0,0x1791,0x9958,0x3A27,0x27B9,
0xD938,0xEB13,0x2BB3,0x2233,0xD2BB,0xA970,0x0789,0x33A7,
0x2DB6,0x3C22,0x1592,0xC920,0x8749,0xAAFF,0x5078,0xA57A,
0x038F,0x59F8,0x0980,0x1A17,0x65DA,0xD731,0x84C6,0xD0B8,
0x82C3,0x29B0,0x5A77,0x1E11,0x7BCB,0xA8FC,0x6DD6,0x2C3A,
},
{ /* second half of table is unsigned char-reversed version of first! */
0xA5C6,0x84F8,0x99EE,0x8DF6,0x0DFF,0xBDD6,0xB1DE,0x5491,
0x5060,0x0302,0xA9CE,0x7D56,0x19E7,0x62B5,0xE64D,0x9AEC,
0x458F,0x9D1F,0x4089,0x87FA,0x15EF,0xEBB2,0xC98E,0x0BFB,
0xEC41,0x67B3,0xFD5F,0xEA45,0xBF23,0xF753,0x96E4,0x5B9B,
0xC275,0x1CE1,0xAE3D,0x6A4C,0x5A6C,0x417E,0x02F5,0x4F83,
0x5C68,0xF451,0x34D1,0x08F9,0x93E2,0x73AB,0x5362,0x3F2A,
0x0C08,0x5295,0x6546,0x5E9D,0x2830,0xA137,0x0F0A,0xB52F,
0x090E,0x3624,0x9B1B,0x3DDF,0x26CD,0x694E,0xCD7F,0x9FEA,
0x1B12,0x9E1D,0x7458,0x2E34,0x2D36,0xB2DC,0xEEB4,0xFB5B,
0xF6A4,0x4D76,0x61B7,0xCE7D,0x7B52,0x3EDD,0x715E,0x9713,
0xF5A6,0x68B9,0x0000,0x2CC1,0x6040,0x1FE3,0xC879,0xEDB6,
0xBED4,0x468D,0xD967,0x4B72,0xDE94,0xD498,0xE8B0,0x4A85,
0x6BBB,0x2AC5,0xE54F,0x16ED,0xC586,0xD79A,0x5566,0x9411,
0xCF8A,0x10E9,0x0604,0x81FE,0xF0A0,0x4478,0xBA25,0xE34B,
0xF3A2,0xFE5D,0xC080,0x8A05,0xAD3F,0xBC21,0x4870,0x04F1,
0xDF63,0xC177,0x75AF,0x6342,0x3020,0x1AE5,0x0EFD,0x6DBF,
0x4C81,0x1418,0x3526,0x2FC3,0xE1BE,0xA235,0xCC88,0x392E,
0x5793,0xF255,0x82FC,0x477A,0xACC8,0xE7BA,0x2B32,0x95E6,
0xA0C0,0x9819,0xD19E,0x7FA3,0x6644,0x7E54,0xAB3B,0x830B,
0xCA8C,0x29C7,0xD36B,0x3C28,0x79A7,0xE2BC,0x1D16,0x76AD,
0x3BDB,0x5664,0x4E74,0x1E14,0xDB92,0x0A0C,0x6C48,0xE4B8,
0x5D9F,0x6EBD,0xEF43,0xA6C4,0xA839,0xA431,0x37D3,0x8BF2,
0x32D5,0x438B,0x596E,0xB7DA,0x8C01,0x64B1,0xD29C,0xE049,
0xB4D8,0xFAAC,0x07F3,0x25CF,0xAFCA,0x8EF4,0xE947,0x1810,
0xD56F,0x88F0,0x6F4A,0x725C,0x2438,0xF157,0xC773,0x5197,
0x23CB,0x7CA1,0x9CE8,0x213E,0xDD96,0xDC61,0x860D,0x850F,
0x90E0,0x427C,0xC471,0xAACC,0xD890,0x0506,0x01F7,0x121C,
0xA3C2,0x5F6A,0xF9AE,0xD069,0x9117,0x5899,0x273A,0xB927,
0x38D9,0x13EB,0xB32B,0x3322,0xBBD2,0x70A9,0x8907,0xA733,
0xB62D,0x223C,0x9215,0x20C9,0x4987,0xFFAA,0x7850,0x7AA5,
0x8F03,0xF859,0x8009,0x171A,0xDA65,0x31D7,0xC684,0xB8D0,
0xC382,0xB029,0x775A,0x111E,0xCB7B,0xFCA8,0xD66D,0x3A2C,
}
};
/*
**********************************************************************
* Routine: Phase 1 -- generate P1K, given TA, TK, IV32
*
* Inputs:
* tk[] = temporal key [128 bits]
* ta[] = transmitter's MAC address [ 48 bits]
* iv32 = upper 32 bits of IV [ 32 bits]
* Output:
* p1k[] = Phase 1 key [ 80 bits]
*
* Note:
* This function only needs to be called every 2**16 packets,
* although in theory it could be called every packet.
*
**********************************************************************
*/
static void phase1(u16 *p1k,const u8 *tk,const u8 *ta,u32 iv32)
{
sint i;
_func_enter_;
/* Initialize the 80 bits of P1K[] from IV32 and TA[0..5] */
p1k[0] = Lo16(iv32);
p1k[1] = Hi16(iv32);
p1k[2] = Mk16(ta[1],ta[0]); /* use TA[] as little-endian */
p1k[3] = Mk16(ta[3],ta[2]);
p1k[4] = Mk16(ta[5],ta[4]);
/* Now compute an unbalanced Feistel cipher with 80-bit block */
/* size on the 80-bit block P1K[], using the 128-bit key TK[] */
for (i=0; i < PHASE1_LOOP_CNT ;i++)
{ /* Each add operation here is mod 2**16 */
p1k[0] += _S_(p1k[4] ^ TK16((i&1)+0));
p1k[1] += _S_(p1k[0] ^ TK16((i&1)+2));
p1k[2] += _S_(p1k[1] ^ TK16((i&1)+4));
p1k[3] += _S_(p1k[2] ^ TK16((i&1)+6));
p1k[4] += _S_(p1k[3] ^ TK16((i&1)+0));
p1k[4] += (unsigned short)i; /* avoid "slide attacks" */
}
_func_exit_;
}
/*
**********************************************************************
* Routine: Phase 2 -- generate RC4KEY, given TK, P1K, IV16
*
* Inputs:
* tk[] = Temporal key [128 bits]
* p1k[] = Phase 1 output key [ 80 bits]
* iv16 = low 16 bits of IV counter [ 16 bits]
* Output:
* rc4key[] = the key used to encrypt the packet [128 bits]
*
* Note:
* The value {TA,IV32,IV16} for Phase1/Phase2 must be unique
* across all packets using the same key TK value. Then, for a
* given value of TK[], this TKIP48 construction guarantees that
* the final RC4KEY value is unique across all packets.
*
* Suggested implementation optimization: if PPK[] is "overlaid"
* appropriately on RC4KEY[], there is no need for the final
* for loop below that copies the PPK[] result into RC4KEY[].
*
**********************************************************************
*/
static void phase2(u8 *rc4key,const u8 *tk,const u16 *p1k,u16 iv16)
{
sint i;
u16 PPK[6]; /* temporary key for mixing */
_func_enter_;
/* Note: all adds in the PPK[] equations below are mod 2**16 */
for (i=0;i<5;i++) PPK[i]=p1k[i]; /* first, copy P1K to PPK */
PPK[5] = p1k[4] +iv16; /* next, add in IV16 */
/* Bijective non-linear mixing of the 96 bits of PPK[0..5] */
PPK[0] += _S_(PPK[5] ^ TK16(0)); /* Mix key in each "round" */
PPK[1] += _S_(PPK[0] ^ TK16(1));
PPK[2] += _S_(PPK[1] ^ TK16(2));
PPK[3] += _S_(PPK[2] ^ TK16(3));
PPK[4] += _S_(PPK[3] ^ TK16(4));
PPK[5] += _S_(PPK[4] ^ TK16(5)); /* Total # S-box lookups == 6 */
/* Final sweep: bijective, "linear". Rotates kill LSB correlations */
PPK[0] += RotR1(PPK[5] ^ TK16(6));
PPK[1] += RotR1(PPK[0] ^ TK16(7)); /* Use all of TK[] in Phase2 */
PPK[2] += RotR1(PPK[1]);
PPK[3] += RotR1(PPK[2]);
PPK[4] += RotR1(PPK[3]);
PPK[5] += RotR1(PPK[4]);
/* Note: At this point, for a given key TK[0..15], the 96-bit output */
/* value PPK[0..5] is guaranteed to be unique, as a function */
/* of the 96-bit "input" value {TA,IV32,IV16}. That is, P1K */
/* is now a keyed permutation of {TA,IV32,IV16}. */
/* Set RC4KEY[0..3], which includes "cleartext" portion of RC4 key */
rc4key[0] = Hi8(iv16); /* RC4KEY[0..2] is the WEP IV */
rc4key[1] =(Hi8(iv16) | 0x20) & 0x7F; /* Help avoid weak (FMS) keys */
rc4key[2] = Lo8(iv16);
rc4key[3] = Lo8((PPK[5] ^ TK16(0)) >> 1);
/* Copy 96 bits of PPK[0..5] to RC4KEY[4..15] (little-endian) */
for (i=0;i<6;i++)
{
rc4key[4+2*i] = Lo8(PPK[i]);
rc4key[5+2*i] = Hi8(PPK[i]);
}
_func_exit_;
}
//The hlen isn't include the IV
u32 rtw_tkip_encrypt(_adapter *padapter, u8 *pxmitframe)
{ // exclude ICV
u16 pnl;
u32 pnh;
u8 rc4key[16];
u8 ttkey[16];
u8 crc[4];
struct arc4context mycontext;
sint curfragnum,length;
u32 prwskeylen;
u8 *pframe, *payload,*iv,*prwskey;
union pn48 dot11txpn;
struct sta_info *stainfo;
struct pkt_attrib *pattrib = &((struct xmit_frame *)pxmitframe)->attrib;
struct security_priv *psecuritypriv=&padapter->securitypriv;
struct xmit_priv *pxmitpriv=&padapter->xmitpriv;
u32 res=_SUCCESS;
_func_enter_;
if(((struct xmit_frame*)pxmitframe)->buf_addr==NULL)
return _FAIL;
#ifdef CONFIG_USB_TX_AGGREGATION
pframe = ((struct xmit_frame*)pxmitframe)->buf_addr + TXDESC_SIZE +
(((struct xmit_frame*)pxmitframe)->pkt_offset * PACKET_OFFSET_SZ);
#else
pframe = ((struct xmit_frame*)pxmitframe)->buf_addr + TXDESC_OFFSET;
#endif
//4 start to encrypt each fragment
if(pattrib->encrypt==_TKIP_){
if(pattrib->psta)
{
stainfo = pattrib->psta;
}
else
{
DBG_871X("%s, call rtw_get_stainfo()\n", __func__);
stainfo=rtw_get_stainfo(&padapter->stapriv ,&pattrib->ra[0] );
}
if (stainfo!=NULL){
if(!(stainfo->state &_FW_LINKED))
{
DBG_871X("%s, psta->state(0x%x) != _FW_LINKED\n", __func__, stainfo->state);
return _FAIL;
}
RT_TRACE(_module_rtl871x_security_c_,_drv_err_,("rtw_tkip_encrypt: stainfo!=NULL!!!\n"));
if(IS_MCAST(pattrib->ra))
{
prwskey=psecuritypriv->dot118021XGrpKey[psecuritypriv->dot118021XGrpKeyid].skey;
}
else
{
prwskey=&stainfo->dot118021x_UncstKey.skey[0];
}
prwskeylen=16;
for(curfragnum=0;curfragnum<pattrib->nr_frags;curfragnum++){
iv=pframe+pattrib->hdrlen;
payload=pframe+pattrib->iv_len+pattrib->hdrlen;
GET_TKIP_PN(iv, dot11txpn);
pnl=(u16)(dot11txpn.val);
pnh=(u32)(dot11txpn.val>>16);
phase1((u16 *)&ttkey[0],prwskey,&pattrib->ta[0],pnh);
phase2(&rc4key[0],prwskey,(u16 *)&ttkey[0],pnl);
if((curfragnum+1)==pattrib->nr_frags){ //4 the last fragment
length=pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len- pattrib->icv_len;
RT_TRACE(_module_rtl871x_security_c_,_drv_info_,("pattrib->iv_len =%x, pattrib->icv_len =%x\n", pattrib->iv_len,pattrib->icv_len));
*((u32 *)crc)=cpu_to_le32(getcrc32(payload,length));/* modified by Amy*/
arcfour_init(&mycontext, rc4key,16);
arcfour_encrypt(&mycontext, payload, payload, length);
arcfour_encrypt(&mycontext, payload+length, crc, 4);
}
else{
length=pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len ;
*((u32 *)crc)=cpu_to_le32(getcrc32(payload,length));/* modified by Amy*/
arcfour_init(&mycontext,rc4key,16);
arcfour_encrypt(&mycontext, payload, payload, length);
arcfour_encrypt(&mycontext, payload+length, crc, 4);
pframe+=pxmitpriv->frag_len;
pframe=(u8 *)RND4((SIZE_PTR)(pframe));
}
}
}
else{
RT_TRACE(_module_rtl871x_security_c_,_drv_err_,("rtw_tkip_encrypt: stainfo==NULL!!!\n"));
DBG_871X("%s, psta==NUL\n", __func__);
res=_FAIL;
}
}
_func_exit_;
return res;
}
//The hlen isn't include the IV
u32 rtw_tkip_decrypt(_adapter *padapter, u8 *precvframe)
{ // exclude ICV
u16 pnl;
u32 pnh;
u8 rc4key[16];
u8 ttkey[16];
u8 crc[4];
struct arc4context mycontext;
sint length;
u32 prwskeylen;
u8 *pframe, *payload,*iv,*prwskey;
union pn48 dot11txpn;
struct sta_info *stainfo;
struct rx_pkt_attrib *prxattrib = &((union recv_frame *)precvframe)->u.hdr.attrib;
struct security_priv *psecuritypriv=&padapter->securitypriv;
// struct recv_priv *precvpriv=&padapter->recvpriv;
u32 res=_SUCCESS;
_func_enter_;
pframe=(unsigned char *)((union recv_frame*)precvframe)->u.hdr.rx_data;
//4 start to decrypt recvframe
if(prxattrib->encrypt==_TKIP_){
stainfo=rtw_get_stainfo(&padapter->stapriv ,&prxattrib->ta[0] );
if (stainfo!=NULL){
if(IS_MCAST(prxattrib->ra))
{
static u32 start = 0;
static u32 no_gkey_bc_cnt = 0;
static u32 no_gkey_mc_cnt = 0;
if(psecuritypriv->binstallGrpkey==_FALSE)
{
res=_FAIL;
if (start == 0)
start = rtw_get_current_time();
if (is_broadcast_mac_addr(prxattrib->ra))
no_gkey_bc_cnt++;
else
no_gkey_mc_cnt++;
if (rtw_get_passing_time_ms(start) > 1000) {
if (no_gkey_bc_cnt || no_gkey_mc_cnt) {
DBG_871X_LEVEL(_drv_always_, FUNC_ADPT_FMT" no_gkey_bc_cnt:%u, no_gkey_mc_cnt:%u\n",
FUNC_ADPT_ARG(padapter), no_gkey_bc_cnt, no_gkey_mc_cnt);
}
start = rtw_get_current_time();
no_gkey_bc_cnt = 0;
no_gkey_mc_cnt = 0;
}
goto exit;
}
if (no_gkey_bc_cnt || no_gkey_mc_cnt) {
DBG_871X_LEVEL(_drv_always_, FUNC_ADPT_FMT" gkey installed. no_gkey_bc_cnt:%u, no_gkey_mc_cnt:%u\n",
FUNC_ADPT_ARG(padapter), no_gkey_bc_cnt, no_gkey_mc_cnt);
}
start = 0;
no_gkey_bc_cnt = 0;
no_gkey_mc_cnt = 0;
//DBG_871X("rx bc/mc packets, to perform sw rtw_tkip_decrypt\n");
//prwskey = psecuritypriv->dot118021XGrpKey[psecuritypriv->dot118021XGrpKeyid].skey;
prwskey = psecuritypriv->dot118021XGrpKey[prxattrib->key_index].skey;
prwskeylen=16;
}
else
{
RT_TRACE(_module_rtl871x_security_c_,_drv_err_,("rtw_tkip_decrypt: stainfo!=NULL!!!\n"));
prwskey=&stainfo->dot118021x_UncstKey.skey[0];
prwskeylen=16;
}
iv=pframe+prxattrib->hdrlen;
payload=pframe+prxattrib->iv_len+prxattrib->hdrlen;
length= ((union recv_frame *)precvframe)->u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len;
GET_TKIP_PN(iv, dot11txpn);
pnl=(u16)(dot11txpn.val);
pnh=(u32)(dot11txpn.val>>16);
phase1((u16 *)&ttkey[0],prwskey,&prxattrib->ta[0],pnh);
phase2(&rc4key[0],prwskey,(unsigned short *)&ttkey[0],pnl);
//4 decrypt payload include icv
arcfour_init(&mycontext, rc4key,16);
arcfour_encrypt(&mycontext, payload, payload, length);
*((u32 *)crc)=le32_to_cpu(getcrc32(payload,length-4));
if(crc[3]!=payload[length-1] || crc[2]!=payload[length-2] || crc[1]!=payload[length-3] || crc[0]!=payload[length-4])
{
RT_TRACE(_module_rtl871x_security_c_,_drv_err_,("rtw_wep_decrypt:icv error crc[3](%x)!=payload[length-1](%x) || crc[2](%x)!=payload[length-2](%x) || crc[1](%x)!=payload[length-3](%x) || crc[0](%x)!=payload[length-4](%x)\n",
crc[3],payload[length-1],crc[2],payload[length-2],crc[1],payload[length-3],crc[0],payload[length-4]));
res=_FAIL;
}
}
else{
RT_TRACE(_module_rtl871x_security_c_,_drv_err_,("rtw_tkip_decrypt: stainfo==NULL!!!\n"));
res=_FAIL;
}
}
_func_exit_;
exit:
return res;
}
//3 =====AES related=====
#define MAX_MSG_SIZE 2048
/*****************************/
/******** SBOX Table *********/
/*****************************/
static u8 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
};
/*****************************/
/**** Function Prototypes ****/
/*****************************/
static void bitwise_xor(u8 *ina, u8 *inb, u8 *out);
static void construct_mic_iv(
u8 *mic_header1,
sint qc_exists,
sint a4_exists,
u8 *mpdu,
uint payload_length,
u8 * pn_vector,
uint frtype);// add for CONFIG_IEEE80211W, none 11w also can use
static void construct_mic_header1(
u8 *mic_header1,
sint header_length,
u8 *mpdu,
uint frtype);// add for CONFIG_IEEE80211W, none 11w also can use
static void construct_mic_header2(
u8 *mic_header2,
u8 *mpdu,
sint a4_exists,
sint qc_exists);
static void construct_ctr_preload(
u8 *ctr_preload,
sint a4_exists,
sint qc_exists,
u8 *mpdu,
u8 *pn_vector,
sint c,
uint frtype);// add for CONFIG_IEEE80211W, none 11w also can use
static void xor_128(u8 *a, u8 *b, u8 *out);
static void xor_32(u8 *a, u8 *b, u8 *out);
static u8 sbox(u8 a);
static void next_key(u8 *key, sint round);
static void byte_sub(u8 *in, u8 *out);
static void shift_row(u8 *in, u8 *out);
static void mix_column(u8 *in, u8 *out);
#ifndef PLATFORM_FREEBSD
static void add_round_key( u8 *shiftrow_in,
u8 *mcol_in,
u8 *block_in,
sint round,
u8 *out);
#endif //PLATFORM_FREEBSD
static void aes128k128d(u8 *key, u8 *data, u8 *ciphertext);
/****************************************/
/* aes128k128d() */
/* Performs a 128 bit AES encrypt with */
/* 128 bit data. */
/****************************************/
static void xor_128(u8 *a, u8 *b, u8 *out)
{
sint i;
_func_enter_;
for (i=0;i<16; i++)
{
out[i] = a[i] ^ b[i];
}
_func_exit_;
}
static void xor_32(u8 *a, u8 *b, u8 *out)
{
sint i;
_func_enter_;
for (i=0;i<4; i++)
{
out[i] = a[i] ^ b[i];
}
_func_exit_;
}