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
|
/*
*************************************************************************
* Ralink Tech Inc.
* 5F., No.36, Taiyuan St., Jhubei City,
* Hsinchu County 302,
* Taiwan, R.O.C.
*
* (c) Copyright 2002-2007, Ralink Technology, Inc.
*
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
*************************************************************************
Module Name:
wpa.c
Abstract:
Revision History:
Who When What
-------- ---------- ----------------------------------------------
Jan Lee 03-07-22 Initial
Paul Lin 03-11-28 Modify for supplicant
*/
#include "../rt_config.h"
// WPA OUI
UCHAR OUI_WPA_NONE_AKM[4] = {0x00, 0x50, 0xF2, 0x00};
UCHAR OUI_WPA_VERSION[4] = {0x00, 0x50, 0xF2, 0x01};
#ifndef RT30xx
UCHAR OUI_WPA_WEP40[4] = {0x00, 0x50, 0xF2, 0x01};
#endif
UCHAR OUI_WPA_TKIP[4] = {0x00, 0x50, 0xF2, 0x02};
UCHAR OUI_WPA_CCMP[4] = {0x00, 0x50, 0xF2, 0x04};
#ifndef RT30xx
UCHAR OUI_WPA_WEP104[4] = {0x00, 0x50, 0xF2, 0x05};
#endif
UCHAR OUI_WPA_8021X_AKM[4] = {0x00, 0x50, 0xF2, 0x01};
UCHAR OUI_WPA_PSK_AKM[4] = {0x00, 0x50, 0xF2, 0x02};
// WPA2 OUI
UCHAR OUI_WPA2_WEP40[4] = {0x00, 0x0F, 0xAC, 0x01};
UCHAR OUI_WPA2_TKIP[4] = {0x00, 0x0F, 0xAC, 0x02};
UCHAR OUI_WPA2_CCMP[4] = {0x00, 0x0F, 0xAC, 0x04};
UCHAR OUI_WPA2_8021X_AKM[4] = {0x00, 0x0F, 0xAC, 0x01};
UCHAR OUI_WPA2_PSK_AKM[4] = {0x00, 0x0F, 0xAC, 0x02};
#ifndef RT30xx
UCHAR OUI_WPA2_WEP104[4] = {0x00, 0x0F, 0xAC, 0x05};
#endif
// MSA OUI
UCHAR OUI_MSA_8021X_AKM[4] = {0x00, 0x0F, 0xAC, 0x05}; // Not yet final - IEEE 802.11s-D1.06
UCHAR OUI_MSA_PSK_AKM[4] = {0x00, 0x0F, 0xAC, 0x06}; // Not yet final - IEEE 802.11s-D1.06
/*
========================================================================
Routine Description:
The pseudo-random function(PRF) that hashes various inputs to
derive a pseudo-random value. To add liveness to the pseudo-random
value, a nonce should be one of the inputs.
It is used to generate PTK, GTK or some specific random value.
Arguments:
UCHAR *key, - the key material for HMAC_SHA1 use
INT key_len - the length of key
UCHAR *prefix - a prefix label
INT prefix_len - the length of the label
UCHAR *data - a specific data with variable length
INT data_len - the length of a specific data
INT len - the output lenght
Return Value:
UCHAR *output - the calculated result
Note:
802.11i-2004 Annex H.3
========================================================================
*/
VOID PRF(
IN UCHAR *key,
IN INT key_len,
IN UCHAR *prefix,
IN INT prefix_len,
IN UCHAR *data,
IN INT data_len,
OUT UCHAR *output,
IN INT len)
{
INT i;
UCHAR *input;
INT currentindex = 0;
INT total_len;
// Allocate memory for input
os_alloc_mem(NULL, (PUCHAR *)&input, 1024);
if (input == NULL)
{
DBGPRINT(RT_DEBUG_ERROR, ("!!!PRF: no memory!!!\n"));
return;
}
// Generate concatenation input
NdisMoveMemory(input, prefix, prefix_len);
// Concatenate a single octet containing 0
input[prefix_len] = 0;
// Concatenate specific data
NdisMoveMemory(&input[prefix_len + 1], data, data_len);
total_len = prefix_len + 1 + data_len;
// Concatenate a single octet containing 0
// This octet shall be update later
input[total_len] = 0;
total_len++;
// Iterate to calculate the result by hmac-sha-1
// Then concatenate to last result
for (i = 0; i < (len + 19) / 20; i++)
{
HMAC_SHA1(input, total_len, key, key_len, &output[currentindex]);
currentindex += 20;
// update the last octet
input[total_len - 1]++;
}
os_free_mem(NULL, input);
}
/*
========================================================================
Routine Description:
It utilizes PRF-384 or PRF-512 to derive session-specific keys from a PMK.
It shall be called by 4-way handshake processing.
Arguments:
pAd - pointer to our pAdapter context
PMK - pointer to PMK
ANonce - pointer to ANonce
AA - pointer to Authenticator Address
SNonce - pointer to SNonce
SA - pointer to Supplicant Address
len - indicate the length of PTK (octet)
Return Value:
Output pointer to the PTK
Note:
Refer to IEEE 802.11i-2004 8.5.1.2
========================================================================
*/
VOID WpaCountPTK(
IN PRTMP_ADAPTER pAd,
IN UCHAR *PMK,
IN UCHAR *ANonce,
IN UCHAR *AA,
IN UCHAR *SNonce,
IN UCHAR *SA,
OUT UCHAR *output,
IN UINT len)
{
UCHAR concatenation[76];
UINT CurrPos = 0;
UCHAR temp[32];
UCHAR Prefix[] = {'P', 'a', 'i', 'r', 'w', 'i', 's', 'e', ' ', 'k', 'e', 'y', ' ',
'e', 'x', 'p', 'a', 'n', 's', 'i', 'o', 'n'};
// initiate the concatenation input
NdisZeroMemory(temp, sizeof(temp));
NdisZeroMemory(concatenation, 76);
// Get smaller address
if (RTMPCompareMemory(SA, AA, 6) == 1)
NdisMoveMemory(concatenation, AA, 6);
else
NdisMoveMemory(concatenation, SA, 6);
CurrPos += 6;
// Get larger address
if (RTMPCompareMemory(SA, AA, 6) == 1)
NdisMoveMemory(&concatenation[CurrPos], SA, 6);
else
NdisMoveMemory(&concatenation[CurrPos], AA, 6);
// store the larger mac address for backward compatible of
// ralink proprietary STA-key issue
NdisMoveMemory(temp, &concatenation[CurrPos], MAC_ADDR_LEN);
CurrPos += 6;
// Get smaller Nonce
if (RTMPCompareMemory(ANonce, SNonce, 32) == 0)
NdisMoveMemory(&concatenation[CurrPos], temp, 32); // patch for ralink proprietary STA-key issue
else if (RTMPCompareMemory(ANonce, SNonce, 32) == 1)
NdisMoveMemory(&concatenation[CurrPos], SNonce, 32);
else
NdisMoveMemory(&concatenation[CurrPos], ANonce, 32);
CurrPos += 32;
// Get larger Nonce
if (RTMPCompareMemory(ANonce, SNonce, 32) == 0)
NdisMoveMemory(&concatenation[CurrPos], temp, 32); // patch for ralink proprietary STA-key issue
else if (RTMPCompareMemory(ANonce, SNonce, 32) == 1)
NdisMoveMemory(&concatenation[CurrPos], ANonce, 32);
else
NdisMoveMemory(&concatenation[CurrPos], SNonce, 32);
CurrPos += 32;
hex_dump("concatenation=", concatenation, 76);
// Use PRF to generate PTK
PRF(PMK, LEN_MASTER_KEY, Prefix, 22, concatenation, 76, output, len);
}
/*
========================================================================
Routine Description:
Generate random number by software.
Arguments:
pAd - pointer to our pAdapter context
macAddr - pointer to local MAC address
Return Value:
Note:
802.1ii-2004 Annex H.5
========================================================================
*/
VOID GenRandom(
IN PRTMP_ADAPTER pAd,
IN UCHAR *macAddr,
OUT UCHAR *random)
{
INT i, curr;
UCHAR local[80], KeyCounter[32];
UCHAR result[80];
ULONG CurrentTime;
UCHAR prefix[] = {'I', 'n', 'i', 't', ' ', 'C', 'o', 'u', 'n', 't', 'e', 'r'};
// Zero the related information
NdisZeroMemory(result, 80);
NdisZeroMemory(local, 80);
NdisZeroMemory(KeyCounter, 32);
for (i = 0; i < 32; i++)
{
// copy the local MAC address
COPY_MAC_ADDR(local, macAddr);
curr = MAC_ADDR_LEN;
// concatenate the current time
NdisGetSystemUpTime(&CurrentTime);
NdisMoveMemory(&local[curr], &CurrentTime, sizeof(CurrentTime));
curr += sizeof(CurrentTime);
// concatenate the last result
NdisMoveMemory(&local[curr], result, 32);
curr += 32;
// concatenate a variable
NdisMoveMemory(&local[curr], &i, 2);
curr += 2;
// calculate the result
PRF(KeyCounter, 32, prefix,12, local, curr, result, 32);
}
NdisMoveMemory(random, result, 32);
}
/*
========================================================================
Routine Description:
Build cipher suite in RSN-IE.
It only shall be called by RTMPMakeRSNIE.
Arguments:
pAd - pointer to our pAdapter context
ElementID - indicate the WPA1 or WPA2
WepStatus - indicate the encryption type
bMixCipher - a boolean to indicate the pairwise cipher and group
cipher are the same or not
Return Value:
Note:
========================================================================
*/
static VOID RTMPInsertRsnIeCipher(
IN PRTMP_ADAPTER pAd,
IN UCHAR ElementID,
IN UINT WepStatus,
IN BOOLEAN bMixCipher,
IN UCHAR FlexibleCipher,
OUT PUCHAR pRsnIe,
OUT UCHAR *rsn_len)
{
UCHAR PairwiseCnt;
*rsn_len = 0;
// decide WPA2 or WPA1
if (ElementID == Wpa2Ie)
{
RSNIE2 *pRsnie_cipher = (RSNIE2*)pRsnIe;
// Assign the verson as 1
pRsnie_cipher->version = 1;
switch (WepStatus)
{
// TKIP mode
case Ndis802_11Encryption2Enabled:
NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA2_TKIP, 4);
pRsnie_cipher->ucount = 1;
NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA2_TKIP, 4);
*rsn_len = sizeof(RSNIE2);
break;
// AES mode
case Ndis802_11Encryption3Enabled:
if (bMixCipher)
NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA2_TKIP, 4);
else
NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA2_CCMP, 4);
pRsnie_cipher->ucount = 1;
NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA2_CCMP, 4);
*rsn_len = sizeof(RSNIE2);
break;
// TKIP-AES mix mode
case Ndis802_11Encryption4Enabled:
NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA2_TKIP, 4);
PairwiseCnt = 1;
// Insert WPA2 TKIP as the first pairwise cipher
if (MIX_CIPHER_WPA2_TKIP_ON(FlexibleCipher))
{
NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA2_TKIP, 4);
// Insert WPA2 AES as the secondary pairwise cipher
if (MIX_CIPHER_WPA2_AES_ON(FlexibleCipher))
{
NdisMoveMemory(pRsnie_cipher->ucast[0].oui + 4, OUI_WPA2_CCMP, 4);
PairwiseCnt = 2;
}
}
else
{
// Insert WPA2 AES as the first pairwise cipher
NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA2_CCMP, 4);
}
pRsnie_cipher->ucount = PairwiseCnt;
*rsn_len = sizeof(RSNIE2) + (4 * (PairwiseCnt - 1));
break;
}
#ifndef RT30xx
if ((pAd->OpMode == OPMODE_STA) &&
(pAd->StaCfg.GroupCipher != Ndis802_11Encryption2Enabled) &&
(pAd->StaCfg.GroupCipher != Ndis802_11Encryption3Enabled))
{
UINT GroupCipher = pAd->StaCfg.GroupCipher;
switch(GroupCipher)
{
case Ndis802_11GroupWEP40Enabled:
NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA2_WEP40, 4);
break;
case Ndis802_11GroupWEP104Enabled:
NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA2_WEP104, 4);
break;
}
}
#endif
// swap for big-endian platform
pRsnie_cipher->version = cpu2le16(pRsnie_cipher->version);
pRsnie_cipher->ucount = cpu2le16(pRsnie_cipher->ucount);
}
else
{
RSNIE *pRsnie_cipher = (RSNIE*)pRsnIe;
// Assign OUI and version
NdisMoveMemory(pRsnie_cipher->oui, OUI_WPA_VERSION, 4);
pRsnie_cipher->version = 1;
switch (WepStatus)
{
// TKIP mode
case Ndis802_11Encryption2Enabled:
NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA_TKIP, 4);
pRsnie_cipher->ucount = 1;
NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA_TKIP, 4);
*rsn_len = sizeof(RSNIE);
break;
// AES mode
case Ndis802_11Encryption3Enabled:
if (bMixCipher)
NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA_TKIP, 4);
else
NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA_CCMP, 4);
pRsnie_cipher->ucount = 1;
NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA_CCMP, 4);
*rsn_len = sizeof(RSNIE);
break;
// TKIP-AES mix mode
case Ndis802_11Encryption4Enabled:
NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA_TKIP, 4);
PairwiseCnt = 1;
// Insert WPA TKIP as the first pairwise cipher
if (MIX_CIPHER_WPA_TKIP_ON(FlexibleCipher))
{
NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA_TKIP, 4);
// Insert WPA AES as the secondary pairwise cipher
if (MIX_CIPHER_WPA_AES_ON(FlexibleCipher))
{
NdisMoveMemory(pRsnie_cipher->ucast[0].oui + 4, OUI_WPA_CCMP, 4);
PairwiseCnt = 2;
}
}
else
{
// Insert WPA AES as the first pairwise cipher
NdisMoveMemory(pRsnie_cipher->ucast[0].oui, OUI_WPA_CCMP, 4);
}
pRsnie_cipher->ucount = PairwiseCnt;
*rsn_len = sizeof(RSNIE) + (4 * (PairwiseCnt - 1));
break;
}
#ifndef RT30xx
if ((pAd->OpMode == OPMODE_STA) &&
(pAd->StaCfg.GroupCipher != Ndis802_11Encryption2Enabled) &&
(pAd->StaCfg.GroupCipher != Ndis802_11Encryption3Enabled))
{
UINT GroupCipher = pAd->StaCfg.GroupCipher;
switch(GroupCipher)
{
case Ndis802_11GroupWEP40Enabled:
NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA_WEP40, 4);
break;
case Ndis802_11GroupWEP104Enabled:
NdisMoveMemory(pRsnie_cipher->mcast, OUI_WPA_WEP104, 4);
break;
}
}
#endif
// swap for big-endian platform
pRsnie_cipher->version = cpu2le16(pRsnie_cipher->version);
pRsnie_cipher->ucount = cpu2le16(pRsnie_cipher->ucount);
}
}
/*
========================================================================
Routine Description:
Build AKM suite in RSN-IE.
It only shall be called by RTMPMakeRSNIE.
Arguments:
pAd - pointer to our pAdapter context
ElementID - indicate the WPA1 or WPA2
AuthMode - indicate the authentication mode
apidx - indicate the interface index
Return Value:
Note:
========================================================================
*/
static VOID RTMPInsertRsnIeAKM(
IN PRTMP_ADAPTER pAd,
IN UCHAR ElementID,
IN UINT AuthMode,
IN UCHAR apidx,
OUT PUCHAR pRsnIe,
OUT UCHAR *rsn_len)
{
RSNIE_AUTH *pRsnie_auth;
pRsnie_auth = (RSNIE_AUTH*)(pRsnIe + (*rsn_len));
// decide WPA2 or WPA1
if (ElementID == Wpa2Ie)
{
switch (AuthMode)
{
case Ndis802_11AuthModeWPA2:
case Ndis802_11AuthModeWPA1WPA2:
pRsnie_auth->acount = 1;
NdisMoveMemory(pRsnie_auth->auth[0].oui, OUI_WPA2_8021X_AKM, 4);
break;
case Ndis802_11AuthModeWPA2PSK:
case Ndis802_11AuthModeWPA1PSKWPA2PSK:
pRsnie_auth->acount = 1;
NdisMoveMemory(pRsnie_auth->auth[0].oui, OUI_WPA2_PSK_AKM, 4);
break;
}
}
else
{
switch (AuthMode)
{
case Ndis802_11AuthModeWPA:
case Ndis802_11AuthModeWPA1WPA2:
pRsnie_auth->acount = 1;
NdisMoveMemory(pRsnie_auth->auth[0].oui, OUI_WPA_8021X_AKM, 4);
break;
case Ndis802_11AuthModeWPAPSK:
case Ndis802_11AuthModeWPA1PSKWPA2PSK:
pRsnie_auth->acount = 1;
NdisMoveMemory(pRsnie_auth->auth[0].oui, OUI_WPA_PSK_AKM, 4);
break;
case Ndis802_11AuthModeWPANone:
pRsnie_auth->acount = 1;
NdisMoveMemory(pRsnie_auth->auth[0].oui, OUI_WPA_NONE_AKM, 4);
break;
}
}
pRsnie_auth->acount = cpu2le16(pRsnie_auth->acount);
(*rsn_len) += sizeof(RSNIE_AUTH); // update current RSNIE length
}
/*
========================================================================
Routine Description:
Build capability in RSN-IE.
It only shall be called by RTMPMakeRSNIE.
Arguments:
pAd - pointer to our pAdapter context
ElementID - indicate the WPA1 or WPA2
apidx - indicate the interface index
Return Value:
Note:
========================================================================
*/
static VOID RTMPInsertRsnIeCap(
IN PRTMP_ADAPTER pAd,
IN UCHAR ElementID,
IN UCHAR apidx,
OUT PUCHAR pRsnIe,
OUT UCHAR *rsn_len)
{
RSN_CAPABILITIES *pRSN_Cap;
// it could be ignored in WPA1 mode
if (ElementID == WpaIe)
return;
pRSN_Cap = (RSN_CAPABILITIES*)(pRsnIe + (*rsn_len));
pRSN_Cap->word = cpu2le16(pRSN_Cap->word);
(*rsn_len) += sizeof(RSN_CAPABILITIES); // update current RSNIE length
}
/*
========================================================================
Routine Description:
Build RSN IE context. It is not included element-ID and length.
Arguments:
pAd - pointer to our pAdapter context
AuthMode - indicate the authentication mode
WepStatus - indicate the encryption type
apidx - indicate the interface index
Return Value:
Note:
========================================================================
*/
VOID RTMPMakeRSNIE(
IN PRTMP_ADAPTER pAd,
IN UINT AuthMode,
IN UINT WepStatus,
IN UCHAR apidx)
{
PUCHAR pRsnIe = NULL; // primary RSNIE
UCHAR *rsnielen_cur_p = 0; // the length of the primary RSNIE
UCHAR *rsnielen_ex_cur_p = 0; // the length of the secondary RSNIE
UCHAR PrimaryRsnie;
BOOLEAN bMixCipher = FALSE; // indicate the pairwise and group cipher are different
UCHAR p_offset;
WPA_MIX_PAIR_CIPHER FlexibleCipher = WPA_TKIPAES_WPA2_TKIPAES; // it provide the more flexible cipher combination in WPA-WPA2 and TKIPAES mode
rsnielen_cur_p = NULL;
rsnielen_ex_cur_p = NULL;
{
{
if (pAd->StaCfg.WpaSupplicantUP != WPA_SUPPLICANT_DISABLE)
{
if (AuthMode < Ndis802_11AuthModeWPA)
return;
}
else
{
// Support WPAPSK or WPA2PSK in STA-Infra mode
// Support WPANone in STA-Adhoc mode
if ((AuthMode != Ndis802_11AuthModeWPAPSK) &&
(AuthMode != Ndis802_11AuthModeWPA2PSK) &&
(AuthMode != Ndis802_11AuthModeWPANone)
)
return;
}
DBGPRINT(RT_DEBUG_TRACE,("==> RTMPMakeRSNIE(STA)\n"));
// Zero RSNIE context
pAd->StaCfg.RSNIE_Len = 0;
NdisZeroMemory(pAd->StaCfg.RSN_IE, MAX_LEN_OF_RSNIE);
// Pointer to RSNIE
rsnielen_cur_p = &pAd->StaCfg.RSNIE_Len;
pRsnIe = pAd->StaCfg.RSN_IE;
bMixCipher = pAd->StaCfg.bMixCipher;
}
}
// indicate primary RSNIE as WPA or WPA2
if ((AuthMode == Ndis802_11AuthModeWPA) ||
(AuthMode == Ndis802_11AuthModeWPAPSK) ||
(AuthMode == Ndis802_11AuthModeWPANone) ||
(AuthMode == Ndis802_11AuthModeWPA1WPA2) ||
(AuthMode == Ndis802_11AuthModeWPA1PSKWPA2PSK))
PrimaryRsnie = WpaIe;
else
PrimaryRsnie = Wpa2Ie;
{
// Build the primary RSNIE
// 1. insert cipher suite
RTMPInsertRsnIeCipher(pAd, PrimaryRsnie, WepStatus, bMixCipher, FlexibleCipher, pRsnIe, &p_offset);
// 2. insert AKM
RTMPInsertRsnIeAKM(pAd, PrimaryRsnie, AuthMode, apidx, pRsnIe, &p_offset);
// 3. insert capability
RTMPInsertRsnIeCap(pAd, PrimaryRsnie, apidx, pRsnIe, &p_offset);
}
// 4. update the RSNIE length
*rsnielen_cur_p = p_offset;
hex_dump("The primary RSNIE", pRsnIe, (*rsnielen_cur_p));
}
/*
==========================================================================
Description:
Check whether the received frame is EAP frame.
Arguments:
pAd - pointer to our pAdapter context
pEntry - pointer to active entry
pData - the received frame
DataByteCount - the received frame's length
FromWhichBSSID - indicate the interface index
Return:
TRUE - This frame is EAP frame
FALSE - otherwise
==========================================================================
*/
BOOLEAN RTMPCheckWPAframe(
IN PRTMP_ADAPTER pAd,
IN PMAC_TABLE_ENTRY pEntry,
IN PUCHAR pData,
IN ULONG DataByteCount,
IN UCHAR FromWhichBSSID)
{
ULONG Body_len;
BOOLEAN Cancelled;
if(DataByteCount < (LENGTH_802_1_H + LENGTH_EAPOL_H))
return FALSE;
// Skip LLC header
if (NdisEqualMemory(SNAP_802_1H, pData, 6) ||
// Cisco 1200 AP may send packet with SNAP_BRIDGE_TUNNEL
NdisEqualMemory(SNAP_BRIDGE_TUNNEL, pData, 6))
{
pData += 6;
}
// Skip 2-bytes EAPoL type
if (NdisEqualMemory(EAPOL, pData, 2))
{
pData += 2;
}
else
return FALSE;
switch (*(pData+1))
{
case EAPPacket:
Body_len = (*(pData+2)<<8) | (*(pData+3));
DBGPRINT(RT_DEBUG_TRACE, ("Receive EAP-Packet frame, TYPE = 0, Length = %ld\n", Body_len));
break;
case EAPOLStart:
DBGPRINT(RT_DEBUG_TRACE, ("Receive EAPOL-Start frame, TYPE = 1 \n"));
if (pEntry->EnqueueEapolStartTimerRunning != EAPOL_START_DISABLE)
{
DBGPRINT(RT_DEBUG_TRACE, ("Cancel the EnqueueEapolStartTimerRunning \n"));
RTMPCancelTimer(&pEntry->EnqueueStartForPSKTimer, &Cancelled);
pEntry->EnqueueEapolStartTimerRunning = EAPOL_START_DISABLE;
}
break;
case EAPOLLogoff:
DBGPRINT(RT_DEBUG_TRACE, ("Receive EAPOLLogoff frame, TYPE = 2 \n"));
break;
case EAPOLKey:
Body_len = (*(pData+2)<<8) | (*(pData+3));
DBGPRINT(RT_DEBUG_TRACE, ("Receive EAPOL-Key frame, TYPE = 3, Length = %ld\n", Body_len));
break;
case EAPOLASFAlert:
DBGPRINT(RT_DEBUG_TRACE, ("Receive EAPOLASFAlert frame, TYPE = 4 \n"));
break;
default:
return FALSE;
}
return TRUE;
}
/*
========================================================================
Routine Description:
Misc function to decrypt AES body
Arguments:
Return Value:
Note:
This function references to RFC 3394 for aes key unwrap algorithm.
========================================================================
*/
VOID AES_GTK_KEY_UNWRAP(
IN UCHAR *key,
OUT UCHAR *plaintext,
IN UCHAR c_len,
IN UCHAR *ciphertext)
{
UCHAR A[8], BIN[16], BOUT[16];
UCHAR xor;
INT i, j;
aes_context aesctx;
UCHAR *R;
INT num_blocks = c_len/8; // unit:64bits
os_alloc_mem(NULL, (PUCHAR *)&R, 512);
if (R == NULL)
{
DBGPRINT(RT_DEBUG_ERROR, ("!!!AES_GTK_KEY_UNWRAP: no memory!!!\n"));
return;
} /* End of if */
// Initialize
NdisMoveMemory(A, ciphertext, 8);
//Input plaintext
for(i = 0; i < (c_len-8); i++)
{
R[ i] = ciphertext[i + 8];
}
rtmp_aes_set_key(&aesctx, key, 128);
for(j = 5; j >= 0; j--)
{
for(i = (num_blocks-1); i > 0; i--)
{
xor = (num_blocks -1 )* j + i;
NdisMoveMemory(BIN, A, 8);
BIN[7] = A[7] ^ xor;
NdisMoveMemory(&BIN[8], &R[(i-1)*8], 8);
rtmp_aes_decrypt(&aesctx, BIN, BOUT);
NdisMoveMemory(A, &BOUT[0], 8);
NdisMoveMemory(&R[(i-1)*8], &BOUT[8], 8);
}
}
// OUTPUT
for(i = 0; i < c_len; i++)
{
plaintext[i] = R[i];
}
os_free_mem(NULL, R);
}
|