Outline ![]()
Files ![]()
loading...
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
/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** NetX Crypto Component */
/** */
/** DES Encryption Standard (DES) */
/** */
/**************************************************************************/
/**************************************************************************/
#include "nx_crypto_des.h"
/* Define the eight S-box data structures used in the permutation. Keep them static,
since there is no reason to have these symbols referenced outside this file. */
static const ULONG sb1[64] =
{
0x01010400UL, 0x00000000UL, 0x00010000UL, 0x01010404UL, 0x01010004UL, 0x00010404UL, 0x00000004UL, 0x00010000UL,
0x00000400UL, 0x01010400UL, 0x01010404UL, 0x00000400UL, 0x01000404UL, 0x01010004UL, 0x01000000UL, 0x00000004UL,
0x00000404UL, 0x01000400UL, 0x01000400UL, 0x00010400UL, 0x00010400UL, 0x01010000UL, 0x01010000UL, 0x01000404UL,
0x00010004UL, 0x01000004UL, 0x01000004UL, 0x00010004UL, 0x00000000UL, 0x00000404UL, 0x00010404UL, 0x01000000UL,
0x00010000UL, 0x01010404UL, 0x00000004UL, 0x01010000UL, 0x01010400UL, 0x01000000UL, 0x01000000UL, 0x00000400UL,
0x01010004UL, 0x00010000UL, 0x00010400UL, 0x01000004UL, 0x00000400UL, 0x00000004UL, 0x01000404UL, 0x00010404UL,
0x01010404UL, 0x00010004UL, 0x01010000UL, 0x01000404UL, 0x01000004UL, 0x00000404UL, 0x00010404UL, 0x01010400UL,
0x00000404UL, 0x01000400UL, 0x01000400UL, 0x00000000UL, 0x00010004UL, 0x00010400UL, 0x00000000UL, 0x01010004UL
};
static const ULONG sb2[64] =
{
0x80108020UL, 0x80008000UL, 0x00008000UL, 0x00108020UL, 0x00100000UL, 0x00000020UL, 0x80100020UL, 0x80008020UL,
0x80000020UL, 0x80108020UL, 0x80108000UL, 0x80000000UL, 0x80008000UL, 0x00100000UL, 0x00000020UL, 0x80100020UL,
0x00108000UL, 0x00100020UL, 0x80008020UL, 0x00000000UL, 0x80000000UL, 0x00008000UL, 0x00108020UL, 0x80100000UL,
0x00100020UL, 0x80000020UL, 0x00000000UL, 0x00108000UL, 0x00008020UL, 0x80108000UL, 0x80100000UL, 0x00008020UL,
0x00000000UL, 0x00108020UL, 0x80100020UL, 0x00100000UL, 0x80008020UL, 0x80100000UL, 0x80108000UL, 0x00008000UL,
0x80100000UL, 0x80008000UL, 0x00000020UL, 0x80108020UL, 0x00108020UL, 0x00000020UL, 0x00008000UL, 0x80000000UL,
0x00008020UL, 0x80108000UL, 0x00100000UL, 0x80000020UL, 0x00100020UL, 0x80008020UL, 0x80000020UL, 0x00100020UL,
0x00108000UL, 0x00000000UL, 0x80008000UL, 0x00008020UL, 0x80000000UL, 0x80100020UL, 0x80108020UL, 0x00108000UL
};
static const ULONG sb3[64] =
{
0x00000208UL, 0x08020200UL, 0x00000000UL, 0x08020008UL, 0x08000200UL, 0x00000000UL, 0x00020208UL, 0x08000200UL,
0x00020008UL, 0x08000008UL, 0x08000008UL, 0x00020000UL, 0x08020208UL, 0x00020008UL, 0x08020000UL, 0x00000208UL,
0x08000000UL, 0x00000008UL, 0x08020200UL, 0x00000200UL, 0x00020200UL, 0x08020000UL, 0x08020008UL, 0x00020208UL,
0x08000208UL, 0x00020200UL, 0x00020000UL, 0x08000208UL, 0x00000008UL, 0x08020208UL, 0x00000200UL, 0x08000000UL,
0x08020200UL, 0x08000000UL, 0x00020008UL, 0x00000208UL, 0x00020000UL, 0x08020200UL, 0x08000200UL, 0x00000000UL,
0x00000200UL, 0x00020008UL, 0x08020208UL, 0x08000200UL, 0x08000008UL, 0x00000200UL, 0x00000000UL, 0x08020008UL,
0x08000208UL, 0x00020000UL, 0x08000000UL, 0x08020208UL, 0x00000008UL, 0x00020208UL, 0x00020200UL, 0x08000008UL,
0x08020000UL, 0x08000208UL, 0x00000208UL, 0x08020000UL, 0x00020208UL, 0x00000008UL, 0x08020008UL, 0x00020200UL
};
static const ULONG sb4[64] =
{
0x00802001UL, 0x00002081UL, 0x00002081UL, 0x00000080UL, 0x00802080UL, 0x00800081UL, 0x00800001UL, 0x00002001UL,
0x00000000UL, 0x00802000UL, 0x00802000UL, 0x00802081UL, 0x00000081UL, 0x00000000UL, 0x00800080UL, 0x00800001UL,
0x00000001UL, 0x00002000UL, 0x00800000UL, 0x00802001UL, 0x00000080UL, 0x00800000UL, 0x00002001UL, 0x00002080UL,
0x00800081UL, 0x00000001UL, 0x00002080UL, 0x00800080UL, 0x00002000UL, 0x00802080UL, 0x00802081UL, 0x00000081UL,
0x00800080UL, 0x00800001UL, 0x00802000UL, 0x00802081UL, 0x00000081UL, 0x00000000UL, 0x00000000UL, 0x00802000UL,
0x00002080UL, 0x00800080UL, 0x00800081UL, 0x00000001UL, 0x00802001UL, 0x00002081UL, 0x00002081UL, 0x00000080UL,
0x00802081UL, 0x00000081UL, 0x00000001UL, 0x00002000UL, 0x00800001UL, 0x00002001UL, 0x00802080UL, 0x00800081UL,
0x00002001UL, 0x00002080UL, 0x00800000UL, 0x00802001UL, 0x00000080UL, 0x00800000UL, 0x00002000UL, 0x00802080UL
};
static const ULONG sb5[64] =
{
0x00000100UL, 0x02080100UL, 0x02080000UL, 0x42000100UL, 0x00080000UL, 0x00000100UL, 0x40000000UL, 0x02080000UL,
0x40080100UL, 0x00080000UL, 0x02000100UL, 0x40080100UL, 0x42000100UL, 0x42080000UL, 0x00080100UL, 0x40000000UL,
0x02000000UL, 0x40080000UL, 0x40080000UL, 0x00000000UL, 0x40000100UL, 0x42080100UL, 0x42080100UL, 0x02000100UL,
0x42080000UL, 0x40000100UL, 0x00000000UL, 0x42000000UL, 0x02080100UL, 0x02000000UL, 0x42000000UL, 0x00080100UL,
0x00080000UL, 0x42000100UL, 0x00000100UL, 0x02000000UL, 0x40000000UL, 0x02080000UL, 0x42000100UL, 0x40080100UL,
0x02000100UL, 0x40000000UL, 0x42080000UL, 0x02080100UL, 0x40080100UL, 0x00000100UL, 0x02000000UL, 0x42080000UL,
0x42080100UL, 0x00080100UL, 0x42000000UL, 0x42080100UL, 0x02080000UL, 0x00000000UL, 0x40080000UL, 0x42000000UL,
0x00080100UL, 0x02000100UL, 0x40000100UL, 0x00080000UL, 0x00000000UL, 0x40080000UL, 0x02080100UL, 0x40000100UL
};
static const ULONG sb6[64] =
{
0x20000010UL, 0x20400000UL, 0x00004000UL, 0x20404010UL, 0x20400000UL, 0x00000010UL, 0x20404010UL, 0x00400000UL,
0x20004000UL, 0x00404010UL, 0x00400000UL, 0x20000010UL, 0x00400010UL, 0x20004000UL, 0x20000000UL, 0x00004010UL,
0x00000000UL, 0x00400010UL, 0x20004010UL, 0x00004000UL, 0x00404000UL, 0x20004010UL, 0x00000010UL, 0x20400010UL,
0x20400010UL, 0x00000000UL, 0x00404010UL, 0x20404000UL, 0x00004010UL, 0x00404000UL, 0x20404000UL, 0x20000000UL,
0x20004000UL, 0x00000010UL, 0x20400010UL, 0x00404000UL, 0x20404010UL, 0x00400000UL, 0x00004010UL, 0x20000010UL,
0x00400000UL, 0x20004000UL, 0x20000000UL, 0x00004010UL, 0x20000010UL, 0x20404010UL, 0x00404000UL, 0x20400000UL,
0x00404010UL, 0x20404000UL, 0x00000000UL, 0x20400010UL, 0x00000010UL, 0x00004000UL, 0x20400000UL, 0x00404010UL,
0x00004000UL, 0x00400010UL, 0x20004010UL, 0x00000000UL, 0x20404000UL, 0x20000000UL, 0x00400010UL, 0x20004010UL
};
static const ULONG sb7[64] =
{
0x00200000UL, 0x04200002UL, 0x04000802UL, 0x00000000UL, 0x00000800UL, 0x04000802UL, 0x00200802UL, 0x04200800UL,
0x04200802UL, 0x00200000UL, 0x00000000UL, 0x04000002UL, 0x00000002UL, 0x04000000UL, 0x04200002UL, 0x00000802UL,
0x04000800UL, 0x00200802UL, 0x00200002UL, 0x04000800UL, 0x04000002UL, 0x04200000UL, 0x04200800UL, 0x00200002UL,
0x04200000UL, 0x00000800UL, 0x00000802UL, 0x04200802UL, 0x00200800UL, 0x00000002UL, 0x04000000UL, 0x00200800UL,
0x04000000UL, 0x00200800UL, 0x00200000UL, 0x04000802UL, 0x04000802UL, 0x04200002UL, 0x04200002UL, 0x00000002UL,
0x00200002UL, 0x04000000UL, 0x04000800UL, 0x00200000UL, 0x04200800UL, 0x00000802UL, 0x00200802UL, 0x04200800UL,
0x00000802UL, 0x04000002UL, 0x04200802UL, 0x04200000UL, 0x00200800UL, 0x00000000UL, 0x00000002UL, 0x04200802UL,
0x00000000UL, 0x00200802UL, 0x04200000UL, 0x00000800UL, 0x04000002UL, 0x04000800UL, 0x00000800UL, 0x00200002UL
};
static const ULONG sb8[64] =
{
0x10001040UL, 0x00001000UL, 0x00040000UL, 0x10041040UL, 0x10000000UL, 0x10001040UL, 0x00000040UL, 0x10000000UL,
0x00040040UL, 0x10040000UL, 0x10041040UL, 0x00041000UL, 0x10041000UL, 0x00041040UL, 0x00001000UL, 0x00000040UL,
0x10040000UL, 0x10000040UL, 0x10001000UL, 0x00001040UL, 0x00041000UL, 0x00040040UL, 0x10040040UL, 0x10041000UL,
0x00001040UL, 0x00000000UL, 0x00000000UL, 0x10040040UL, 0x10000040UL, 0x10001000UL, 0x00041040UL, 0x00040000UL,
0x00041040UL, 0x00040000UL, 0x10041000UL, 0x00001000UL, 0x00000040UL, 0x10040040UL, 0x00001000UL, 0x00041040UL,
0x10001000UL, 0x00000040UL, 0x10000040UL, 0x10040000UL, 0x10040040UL, 0x10000000UL, 0x00040000UL, 0x10001040UL,
0x00000000UL, 0x10041040UL, 0x00040040UL, 0x10000040UL, 0x10040000UL, 0x10001000UL, 0x10001040UL, 0x00000000UL,
0x10041040UL, 0x00041000UL, 0x00041000UL, 0x00001040UL, 0x00001040UL, 0x00040040UL, 0x10000000UL, 0x10041000UL
};
/* Define the left half bit swap table. */
static const ULONG left_half_bit_swap[16] =
{
0x00000000UL, 0x00000001UL, 0x00000100UL, 0x00000101UL,
0x00010000UL, 0x00010001UL, 0x00010100UL, 0x00010101UL,
0x01000000UL, 0x01000001UL, 0x01000100UL, 0x01000101UL,
0x01010000UL, 0x01010001UL, 0x01010100UL, 0x01010101UL
};
/* Define the right half bit swap table. */
static const ULONG right_half_bit_swap[16] =
{
0x00000000UL, 0x01000000UL, 0x00010000UL, 0x01010000UL,
0x00000100UL, 0x01000100UL, 0x00010100UL, 0x01010100UL,
0x00000001UL, 0x01000001UL, 0x00010001UL, 0x01010001UL,
0x00000101UL, 0x01000101UL, 0x00010101UL, 0x01010101UL
};
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_des_key_set PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function sets up the 32 encryption keys as well as the 32 */
/* decryption keys for the DES algorithm. It must be called before */
/* either _nx_crypto_des_encrypt or _nx_crypto_des_decrypt can be */
/* called. */
/* */
/* INPUT */
/* */
/* context DES context pointer */
/* key 8-byte (64-bit) key */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* _nx_crypto_3des_key_set Set the key for 3DES */
/* _nx_crypto_method_des_init Init the method for DES */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_des_key_set(NX_CRYPTO_DES *context, UCHAR key[8])
{
ULONG left, right, temp;
ULONG *encrypt_keys_ptr;
ULONG *decrypt_keys_ptr;
UINT round;
/* Determine if the context is non-null. */
if (context == NX_CRYPTO_NULL)
{
return(NX_CRYPTO_PTR_ERROR);
}
/* First, convert the 8-byte raw key into two ULONG halves, in an endian neutral fashion. */
left = (((ULONG)key[0]) << 24) | (((ULONG)key[1]) << 16) | (((ULONG)key[2]) << 8) | ((ULONG)key[3]);
right = (((ULONG)key[4]) << 24) | (((ULONG)key[5]) << 16) | (((ULONG)key[6]) << 8) | ((ULONG)key[7]);
/* Perform permutation on the key halves. */
temp = ((right >> 4) ^ left) & 0x0F0F0F0FUL;
left = left ^ temp;
right = right ^ (temp << 4);
temp = (right ^ left) & 0x10101010;
left = left ^ temp;
right = right ^ temp;
left = (left_half_bit_swap[(left) & 0xf] << 3) | (left_half_bit_swap[(left >> 8) & 0xf] << 2) |
(left_half_bit_swap[(left >> 16) & 0xf] << 1) | (left_half_bit_swap[(left >> 24) & 0xf]) |
(left_half_bit_swap[(left >> 5) & 0xf] << 7) | (left_half_bit_swap[(left >> 13) & 0xf] << 6) |
(left_half_bit_swap[(left >> 21) & 0xf] << 5) | (left_half_bit_swap[(left >> 29) & 0xf] << 4);
left = left & 0x0fffffff;
right = (right_half_bit_swap[(right >> 1) & 0xf] << 3) | (right_half_bit_swap[(right >> 9) & 0xf] << 2) |
(right_half_bit_swap[(right >> 17) & 0xf] << 1) | (right_half_bit_swap[(right >> 25) & 0xf]) |
(right_half_bit_swap[(right >> 4) & 0xf] << 7) | (right_half_bit_swap[(right >> 12) & 0xf] << 6) |
(right_half_bit_swap[(right >> 20) & 0xf] << 5) | (right_half_bit_swap[(right >> 28) & 0xf] << 4);
right = right & 0x0fffffff;
/* Setup encryption keys pointer. */
encrypt_keys_ptr = context -> nx_des_encryption_keys;
/* Calculate the encryption keys. */
for (round = 0; round < 16; round++)
{
/* Modify the left and right portions of the keys. */
if ((round < 2) || (round == 8) || (round == 15))
{
left = ((left << 1) | (left >> 27)) & 0x0FFFFFFFUL;
right = ((right << 1) | (right >> 27)) & 0x0FFFFFFFUL;
}
else
{
left = ((left << 2) | (left >> 26)) & 0x0FFFFFFFUL;
right = ((right << 2) | (right >> 26)) & 0x0FFFFFFFUL;
}
/* Setup the key. */
*encrypt_keys_ptr++ = ((left << 4) & 0x24000000UL) | ((left << 28) & 0x10000000UL) |
((left << 14) & 0x08000000UL) | ((left << 18) & 0x02080000UL) |
((left << 6) & 0x01000000UL) | ((left << 9) & 0x00200000UL) |
((left >> 1) & 0x00100000UL) | ((left << 10) & 0x00040000UL) |
((left << 2) & 0x00020000UL) | ((left >> 10) & 0x00010000UL) |
((right >> 13) & 0x00002000UL) | ((right >> 4) & 0x00001000UL) |
((right << 6) & 0x00000800UL) | ((right >> 1) & 0x00000400UL) |
((right >> 14) & 0x00000200UL) | (right & 0x00000100UL) |
((right >> 5) & 0x00000020UL) | ((right >> 10) & 0x00000010UL) |
((right >> 3) & 0x00000008UL) | ((right >> 18) & 0x00000004UL) |
((right >> 26) & 0x00000002UL) | ((right >> 24) & 0x00000001UL);
/* Setup the next key. */
*encrypt_keys_ptr++ = ((left << 15) & 0x20000000UL) | ((left << 17) & 0x10000000UL) |
((left << 10) & 0x08000000UL) | ((left << 22) & 0x04000000UL) |
((left >> 2) & 0x02000000UL) | ((left << 1) & 0x01000000UL) |
((left << 16) & 0x00200000UL) | ((left << 11) & 0x00100000UL) |
((left << 3) & 0x00080000UL) | ((left >> 6) & 0x00040000UL) |
((left << 15) & 0x00020000UL) | ((left >> 4) & 0x00010000UL) |
((right >> 2) & 0x00002000UL) | ((right << 8) & 0x00001000UL) |
((right >> 14) & 0x00000808UL) | ((right >> 9) & 0x00000400UL) |
((right) & 0x00000200UL) | ((right << 7) & 0x00000100UL) |
((right >> 7) & 0x00000020UL) | ((right >> 3) & 0x00000011UL) |
((right << 2) & 0x00000004UL) | ((right >> 21) & 0x00000002UL);
}
/* Reposition the encryption key pointer. */
encrypt_keys_ptr = encrypt_keys_ptr - 2;
/* Setup decryption pointer. */
decrypt_keys_ptr = context -> nx_des_decryption_keys;
/* Now setup decryption keys. */
for (round = 0; round < 16; round++)
{
/* Copy the reverse of the encryption keys. */
*decrypt_keys_ptr++ = *encrypt_keys_ptr;
*decrypt_keys_ptr++ = *(encrypt_keys_ptr + 1);
/* Adjust the encryption keys pointer. */
encrypt_keys_ptr = encrypt_keys_ptr - 2;
}
#ifdef NX_SECURE_KEY_CLEAR
left = 0; right = 0; temp = 0;
#endif /* NX_SECURE_KEY_CLEAR */
/* Return successful completion. */
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_des_encrypt PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function uses the DES algorithm to encrypt 8-bytes (64-bits). */
/* The result is 8 encrypted bytes. Note that the caller must make */
/* sure the source and destination are 8-bytes in size! */
/* */
/* INPUT */
/* */
/* context DES context pointer */
/* source 8-byte source */
/* destination 8-byte destination */
/* length The length of output buffer */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_crypto_des_process_block Encrypt 8-bytes of source */
/* */
/* CALLED BY */
/* */
/* _nx_crypto_3des_encrypt Perform 3DES mode encryption */
/* _nx_crypto_3des_decrypt Perform 3DES mode decryption */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* updated constants, */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_des_encrypt(NX_CRYPTO_DES *context, UCHAR source[8], UCHAR destination[8], UINT length)
{
NX_CRYPTO_PARAMETER_NOT_USED(length);
/* Encrypt the block by supplying the encryption key set. */
_nx_crypto_des_process_block(source, destination, context -> nx_des_encryption_keys);
/* Return successful completion. */
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_des_decrypt PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function uses the DES algorithm to decrypt 8-bytes (64-bits). */
/* The result is 8 original source bytes. Note that the caller must */
/* make sure the source and destination are 8-bytes in size! */
/* */
/* INPUT */
/* */
/* context DES context pointer */
/* source 8-byte source */
/* destination 8-byte destination */
/* length The length of output buffer */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_crypto_des_process_block Decrypt 8-bytes of source */
/* */
/* CALLED BY */
/* */
/* _nx_crypto_3des_encrypt Perform 3DES mode encryption */
/* _nx_crypto_3des_decrypt Perform 3DES mode decryption */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* updated constants, */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_des_decrypt(NX_CRYPTO_DES *context, UCHAR source[8], UCHAR destination[8], UINT length)
{
NX_CRYPTO_PARAMETER_NOT_USED(length);
/* Decrypt the block by supplying the decryption key set. */
_nx_crypto_des_process_block(source, destination, context -> nx_des_decryption_keys);
/* Return successful completion. */
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_des_process_block PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function uses the DES algorithm to decrypt 8-bytes (64-bits). */
/* The result is 8 original source bytes. Note that the caller must */
/* make sure the source and destination are 8-bytes in size! */
/* */
/* INPUT */
/* */
/* source 8-byte source */
/* destination 8-byte destination */
/* keys Pointer to either the encrypt */
/* or decrypt keys */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* _nx_crypto_des_encrypt Perform DES mode encryption */
/* _nx_crypto_des_decrypt Perform DES mode decryption */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP VOID _nx_crypto_des_process_block(UCHAR source[8], UCHAR destination[8], ULONG keys[32])
{
ULONG left, right, temp;
ULONG *key_ptr;
UINT round;
/* First, convert the 8-byte source into two ULONG halves, in an endian neutral fashion. */
left = (((ULONG)source[0]) << 24) | (((ULONG)source[1]) << 16) | (((ULONG)source[2]) << 8) | ((ULONG)source[3]);
right = (((ULONG)source[4]) << 24) | (((ULONG)source[5]) << 16) | (((ULONG)source[6]) << 8) | ((ULONG)source[7]);
/* Compute the initial permutation. */
temp = ((left >> 4) ^ right) & 0x0F0F0F0FUL;
right = right ^ temp;
left = left ^ (temp << 4);
temp = ((left >> 16) ^ right) & 0x0000FFFFUL;
right = right ^ temp;
left = left ^ (temp << 16);
temp = ((right >> 2) ^ left) & 0x33333333UL;
left = left ^ temp;
right = right ^ (temp << 2);
temp = ((right >> 8) ^ left) & 0x00FF00FFUL;
left = left ^ temp;
right = right ^ (temp << 8);
right = ((right << 1) | (right >> 31)) & 0xFFFFFFFFUL;
temp = (left ^ right) & 0xAAAAAAAAUL;
right = right ^ temp;
left = left ^ temp;
left = ((left << 1) | (left >> 31)) & 0xFFFFFFFFUL;
/* Setup pointer to input keys. */
key_ptr = keys;
/* Now process the 16 rounds of the DES computation. There are two rounds per
loop. */
for (round = 0; round < 8; round++)
{
/* Calculate the left half. */
temp = *key_ptr++ ^ right;
left = left ^ sb8[temp & 0x3F] ^ sb6[(temp >> 8) & 0x3F] ^ sb4[(temp >> 16) & 0x3F] ^ sb2[(temp >> 24) & 0x3F];
temp = *key_ptr++ ^ ((right << 28) | (right >> 4));
left = left ^ sb7[temp & 0x3F] ^ sb5[(temp >> 8) & 0x3F] ^ sb3[(temp >> 16) & 0x3F] ^ sb1[(temp >> 24) & 0x3F];
/* Calculate the right half. */
temp = *key_ptr++ ^ left;
right = right ^ sb8[temp & 0x3F] ^ sb6[(temp >> 8) & 0x3F] ^ sb4[(temp >> 16) & 0x3F] ^ sb2[(temp >> 24) & 0x3F];
temp = *key_ptr++ ^ ((left << 28) | (left >> 4));
right = right ^ sb7[temp & 0x3F] ^ sb5[(temp >> 8) & 0x3F] ^ sb3[(temp >> 16) & 0x3F] ^ sb1[(temp >> 24) & 0x3F];
}
/* Now compute the final permutation. */
right = ((right << 31) | (right >> 1)) & 0xFFFFFFFFUL;
temp = (right ^ left) & 0xAAAAAAAAUL;
right = right ^ temp;
left = left ^ temp;
left = ((left << 31) | (left >> 1)) & 0xFFFFFFFFUL;
temp = ((left >> 8) ^ right) & 0x00FF00FFUL;
right = right ^ temp;
left = left ^ (temp << 8);
temp = ((left >> 2) ^ right) & 0x33333333UL;
right = right ^ temp;
left = left ^ (temp << 2);
temp = ((right >> 16) ^ left) & 0x0000FFFFUL;
left = left ^ temp;
right = right ^ (temp << 16);
temp = ((right >> 4) ^ left) & 0x0F0F0F0FUL;
left = left ^ temp;
right = right ^ (temp << 4);
/* Finally, build the output. */
destination[0] = (UCHAR)(right >> 24);
destination[1] = (UCHAR)(right >> 16);
destination[2] = (UCHAR)(right >> 8);
destination[3] = (UCHAR)(right);
destination[4] = (UCHAR)(left >> 24);
destination[5] = (UCHAR)(left >> 16);
destination[6] = (UCHAR)(left >> 8);
destination[7] = (UCHAR)(left);
#ifdef NX_SECURE_KEY_CLEAR
left = 0; right = 0; temp = 0;
#endif /* NX_SECURE_KEY_CLEAR */
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_method_des_init PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the common crypto method init callback for */
/* Microsoft supported 3DES cryptographic algorithm. */
/* */
/* INPUT */
/* */
/* method Pointer to crypto method */
/* key Pointer to key */
/* key_size_in_bits Length of key size in bits */
/* handler Returned crypto handler */
/* crypto_metadata Metadata area */
/* crypto_metadata_size Size of the metadata area */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_crypto_des_key_set Set the key for DES */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_method_des_init(struct NX_CRYPTO_METHOD_STRUCT *method,
UCHAR *key, NX_CRYPTO_KEY_SIZE key_size_in_bits, VOID **handle,
VOID *crypto_metadata,
ULONG crypto_metadata_size)
{
NX_CRYPTO_DES *des_context_ptr;
NX_CRYPTO_PARAMETER_NOT_USED(handle);
NX_CRYPTO_STATE_CHECK
/* Validate input parameters. */
if ((method == NX_CRYPTO_NULL) || (key == NX_CRYPTO_NULL) || (crypto_metadata == NX_CRYPTO_NULL))
{
return(NX_CRYPTO_PTR_ERROR);
}
if ((key_size_in_bits != NX_CRYPTO_DES_KEY_LEN_IN_BITS) || (crypto_metadata_size < sizeof(NX_CRYPTO_DES)))
{
return(NX_CRYPTO_SIZE_ERROR);
}
/* Verify the metadata addrsss is 4-byte aligned. */
if((((ULONG)crypto_metadata) & 0x3) != 0)
{
return(NX_CRYPTO_PTR_ERROR);
}
des_context_ptr = (NX_CRYPTO_DES *)(crypto_metadata);
_nx_crypto_des_key_set(des_context_ptr, key);
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_method_des_cleanup PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function cleans up the crypto metadata. */
/* */
/* INPUT */
/* */
/* crypto_metadata Crypto metadata */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* NX_CRYPTO_MEMSET Set the memory */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_method_des_cleanup(VOID *crypto_metadata)
{
NX_CRYPTO_STATE_CHECK
#ifdef NX_SECURE_KEY_CLEAR
if (!crypto_metadata)
return (NX_CRYPTO_SUCCESS);
/* Clean up the crypto metadata. */
NX_CRYPTO_MEMSET(crypto_metadata, 0, sizeof(NX_CRYPTO_DES));
#else
NX_CRYPTO_PARAMETER_NOT_USED(crypto_metadata);
#endif/* NX_SECURE_KEY_CLEAR */
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_method_des_operation PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function handles des encrpt or decrypt operations. */
/* */
/* INPUT */
/* */
/* op Operation Type */
/* Encrypt, Decrypt, Authenticate*/
/* handler Pointer to crypto context */
/* method Pointer to crypto method */
/* key Pointer to key */
/* key_size_in_bits Length of key size in bits */
/* input Input Stream */
/* input_length_in_byte Input Stream Length */
/* iv_ptr Initialized Vector */
/* output Output Stream */
/* output_length_in_byte Output Stream Length */
/* crypto_metadata Metadata area */
/* crypto_metadata_size Size of the metadata area */
/* packet_ptr Pointer to packet */
/* nx_crypto_hw_process_callback Callback function pointer */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_crypto_cbc_encrypt Perform CBC mode encryption */
/* _nx_crypto_cbc_decrypt Perform CBC mode decryption */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_method_des_operation(UINT op, /* Encrypt, Decrypt, Authenticate */
VOID *handler, /* Crypto handler */
struct NX_CRYPTO_METHOD_STRUCT *method,
UCHAR *key,
NX_CRYPTO_KEY_SIZE key_size_in_bits,
UCHAR *input,
ULONG input_length_in_byte,
UCHAR *iv_ptr,
UCHAR *output,
ULONG output_length_in_byte,
VOID *crypto_metadata,
ULONG crypto_metadata_size,
VOID *packet_ptr,
VOID (*nx_crypto_hw_process_callback)(VOID *packet_ptr, UINT status))
{
UINT status = NX_CRYPTO_NOT_SUCCESSFUL;
NX_CRYPTO_DES *context;
NX_CRYPTO_PARAMETER_NOT_USED(handler);
NX_CRYPTO_PARAMETER_NOT_USED(key);
NX_CRYPTO_PARAMETER_NOT_USED(key_size_in_bits);
NX_CRYPTO_PARAMETER_NOT_USED(output_length_in_byte);
NX_CRYPTO_PARAMETER_NOT_USED(packet_ptr);
NX_CRYPTO_PARAMETER_NOT_USED(nx_crypto_hw_process_callback);
NX_CRYPTO_STATE_CHECK
if (op == NX_CRYPTO_AUTHENTICATE)
{
/* Incorrect Operation. */
return(NX_CRYPTO_NOT_SUCCESSFUL);
}
if ((method == NX_CRYPTO_NULL) || (crypto_metadata == NX_CRYPTO_NULL))
{
return(NX_CRYPTO_PTR_ERROR);
}
/* Verify the metadata addrsss is 4-byte aligned. */
if((((ULONG)crypto_metadata) & 0x3) != 0)
{
return(NX_CRYPTO_PTR_ERROR);
}
if(crypto_metadata_size < sizeof(NX_CRYPTO_DES))
{
return(NX_CRYPTO_PTR_ERROR);
}
if (method -> nx_crypto_algorithm != NX_CRYPTO_ENCRYPTION_DES_CBC)
{
/* Incorrect method. */
return(NX_CRYPTO_NOT_SUCCESSFUL);
}
context = (NX_CRYPTO_DES *)crypto_metadata;
switch (op)
{
case NX_CRYPTO_DECRYPT:
{
status = _nx_crypto_cbc_decrypt_init(&(context -> nx_crypto_cbc_context),
iv_ptr, method -> nx_crypto_IV_size_in_bits >> 3);
if (status)
{
break;
}
status = _nx_crypto_cbc_decrypt(context, &(context -> nx_crypto_cbc_context),
(UINT (*)(VOID *, UCHAR *, UCHAR *, UINT))_nx_crypto_des_decrypt,
input, output, input_length_in_byte,
(NX_CRYPTO_DES_BLOCK_SIZE_IN_BITS >> 3));
} break;
case NX_CRYPTO_ENCRYPT:
{
status = _nx_crypto_cbc_encrypt_init(&(context -> nx_crypto_cbc_context),
iv_ptr, method -> nx_crypto_IV_size_in_bits >> 3);
if (status)
{
break;
}
status = _nx_crypto_cbc_encrypt(context, &(context -> nx_crypto_cbc_context),
(UINT (*)(VOID *, UCHAR *, UCHAR *, UINT))_nx_crypto_des_encrypt,
input, output, input_length_in_byte,
(NX_CRYPTO_DES_BLOCK_SIZE_IN_BITS >> 3));
} break;
case NX_CRYPTO_DECRYPT_INITIALIZE:
{
status = _nx_crypto_cbc_decrypt_init(&(context -> nx_crypto_cbc_context),
iv_ptr, method -> nx_crypto_IV_size_in_bits >> 3);
} break;
case NX_CRYPTO_ENCRYPT_INITIALIZE:
{
status = _nx_crypto_cbc_encrypt_init(&(context -> nx_crypto_cbc_context),
iv_ptr, method -> nx_crypto_IV_size_in_bits >> 3);
} break;
case NX_CRYPTO_DECRYPT_UPDATE:
{
status = _nx_crypto_cbc_decrypt(context, &(context -> nx_crypto_cbc_context),
(UINT (*)(VOID *, UCHAR *, UCHAR *, UINT))_nx_crypto_des_decrypt,
input, output, input_length_in_byte,
(NX_CRYPTO_DES_BLOCK_SIZE_IN_BITS >> 3));
} break;
case NX_CRYPTO_ENCRYPT_UPDATE:
{
status = _nx_crypto_cbc_encrypt(context, &(context -> nx_crypto_cbc_context),
(UINT (*)(VOID *, UCHAR *, UCHAR *, UINT))_nx_crypto_des_encrypt,
input, output, input_length_in_byte,
(NX_CRYPTO_DES_BLOCK_SIZE_IN_BITS >> 3));
} break;
case NX_CRYPTO_ENCRYPT_CALCULATE:
/* fallthrough */
case NX_CRYPTO_DECRYPT_CALCULATE:
{
/* Nothing to do. */
status = NX_CRYPTO_SUCCESS;
} break;
default:
{
status = NX_CRYPTO_INVALID_ALGORITHM;
} break;
}
return(status);
}