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
| /* SPDX-License-Identifier: GPL-2.0-only */
| /*
| * Accelerated GHASH implementation with ARMv8 PMULL instructions.
| *
| * Copyright (C) 2014 - 2018 Linaro Ltd. <ard.biesheuvel@linaro.org>
| */
|
| #include <linux/linkage.h>
| #include <asm/assembler.h>
|
| SHASH .req v0
| SHASH2 .req v1
| T1 .req v2
| T2 .req v3
| MASK .req v4
| XM .req v5
| XL .req v6
| XH .req v7
| IN1 .req v7
|
| k00_16 .req v8
| k32_48 .req v9
|
| t3 .req v10
| t4 .req v11
| t5 .req v12
| t6 .req v13
| t7 .req v14
| t8 .req v15
| t9 .req v16
|
| perm1 .req v17
| perm2 .req v18
| perm3 .req v19
|
| sh1 .req v20
| sh2 .req v21
| sh3 .req v22
| sh4 .req v23
|
| ss1 .req v24
| ss2 .req v25
| ss3 .req v26
| ss4 .req v27
|
| XL2 .req v8
| XM2 .req v9
| XH2 .req v10
| XL3 .req v11
| XM3 .req v12
| XH3 .req v13
| TT3 .req v14
| TT4 .req v15
| HH .req v16
| HH3 .req v17
| HH4 .req v18
| HH34 .req v19
|
| .text
| .arch armv8-a+crypto
|
| .macro __pmull_p64, rd, rn, rm
| pmull \rd\().1q, \rn\().1d, \rm\().1d
| .endm
|
| .macro __pmull2_p64, rd, rn, rm
| pmull2 \rd\().1q, \rn\().2d, \rm\().2d
| .endm
|
| .macro __pmull_p8, rq, ad, bd
| ext t3.8b, \ad\().8b, \ad\().8b, #1 // A1
| ext t5.8b, \ad\().8b, \ad\().8b, #2 // A2
| ext t7.8b, \ad\().8b, \ad\().8b, #3 // A3
|
| __pmull_p8_\bd \rq, \ad
| .endm
|
| .macro __pmull2_p8, rq, ad, bd
| tbl t3.16b, {\ad\().16b}, perm1.16b // A1
| tbl t5.16b, {\ad\().16b}, perm2.16b // A2
| tbl t7.16b, {\ad\().16b}, perm3.16b // A3
|
| __pmull2_p8_\bd \rq, \ad
| .endm
|
| .macro __pmull_p8_SHASH, rq, ad
| __pmull_p8_tail \rq, \ad\().8b, SHASH.8b, 8b,, sh1, sh2, sh3, sh4
| .endm
|
| .macro __pmull_p8_SHASH2, rq, ad
| __pmull_p8_tail \rq, \ad\().8b, SHASH2.8b, 8b,, ss1, ss2, ss3, ss4
| .endm
|
| .macro __pmull2_p8_SHASH, rq, ad
| __pmull_p8_tail \rq, \ad\().16b, SHASH.16b, 16b, 2, sh1, sh2, sh3, sh4
| .endm
|
| .macro __pmull_p8_tail, rq, ad, bd, nb, t, b1, b2, b3, b4
| pmull\t t3.8h, t3.\nb, \bd // F = A1*B
| pmull\t t4.8h, \ad, \b1\().\nb // E = A*B1
| pmull\t t5.8h, t5.\nb, \bd // H = A2*B
| pmull\t t6.8h, \ad, \b2\().\nb // G = A*B2
| pmull\t t7.8h, t7.\nb, \bd // J = A3*B
| pmull\t t8.8h, \ad, \b3\().\nb // I = A*B3
| pmull\t t9.8h, \ad, \b4\().\nb // K = A*B4
| pmull\t \rq\().8h, \ad, \bd // D = A*B
|
| eor t3.16b, t3.16b, t4.16b // L = E + F
| eor t5.16b, t5.16b, t6.16b // M = G + H
| eor t7.16b, t7.16b, t8.16b // N = I + J
|
| uzp1 t4.2d, t3.2d, t5.2d
| uzp2 t3.2d, t3.2d, t5.2d
| uzp1 t6.2d, t7.2d, t9.2d
| uzp2 t7.2d, t7.2d, t9.2d
|
| // t3 = (L) (P0 + P1) << 8
| // t5 = (M) (P2 + P3) << 16
| eor t4.16b, t4.16b, t3.16b
| and t3.16b, t3.16b, k32_48.16b
|
| // t7 = (N) (P4 + P5) << 24
| // t9 = (K) (P6 + P7) << 32
| eor t6.16b, t6.16b, t7.16b
| and t7.16b, t7.16b, k00_16.16b
|
| eor t4.16b, t4.16b, t3.16b
| eor t6.16b, t6.16b, t7.16b
|
| zip2 t5.2d, t4.2d, t3.2d
| zip1 t3.2d, t4.2d, t3.2d
| zip2 t9.2d, t6.2d, t7.2d
| zip1 t7.2d, t6.2d, t7.2d
|
| ext t3.16b, t3.16b, t3.16b, #15
| ext t5.16b, t5.16b, t5.16b, #14
| ext t7.16b, t7.16b, t7.16b, #13
| ext t9.16b, t9.16b, t9.16b, #12
|
| eor t3.16b, t3.16b, t5.16b
| eor t7.16b, t7.16b, t9.16b
| eor \rq\().16b, \rq\().16b, t3.16b
| eor \rq\().16b, \rq\().16b, t7.16b
| .endm
|
| .macro __pmull_pre_p64
| add x8, x3, #16
| ld1 {HH.2d-HH4.2d}, [x8]
|
| trn1 SHASH2.2d, SHASH.2d, HH.2d
| trn2 T1.2d, SHASH.2d, HH.2d
| eor SHASH2.16b, SHASH2.16b, T1.16b
|
| trn1 HH34.2d, HH3.2d, HH4.2d
| trn2 T1.2d, HH3.2d, HH4.2d
| eor HH34.16b, HH34.16b, T1.16b
|
| movi MASK.16b, #0xe1
| shl MASK.2d, MASK.2d, #57
| .endm
|
| .macro __pmull_pre_p8
| ext SHASH2.16b, SHASH.16b, SHASH.16b, #8
| eor SHASH2.16b, SHASH2.16b, SHASH.16b
|
| // k00_16 := 0x0000000000000000_000000000000ffff
| // k32_48 := 0x00000000ffffffff_0000ffffffffffff
| movi k32_48.2d, #0xffffffff
| mov k32_48.h[2], k32_48.h[0]
| ushr k00_16.2d, k32_48.2d, #32
|
| // prepare the permutation vectors
| mov_q x5, 0x080f0e0d0c0b0a09
| movi T1.8b, #8
| dup perm1.2d, x5
| eor perm1.16b, perm1.16b, T1.16b
| ushr perm2.2d, perm1.2d, #8
| ushr perm3.2d, perm1.2d, #16
| ushr T1.2d, perm1.2d, #24
| sli perm2.2d, perm1.2d, #56
| sli perm3.2d, perm1.2d, #48
| sli T1.2d, perm1.2d, #40
|
| // precompute loop invariants
| tbl sh1.16b, {SHASH.16b}, perm1.16b
| tbl sh2.16b, {SHASH.16b}, perm2.16b
| tbl sh3.16b, {SHASH.16b}, perm3.16b
| tbl sh4.16b, {SHASH.16b}, T1.16b
| ext ss1.8b, SHASH2.8b, SHASH2.8b, #1
| ext ss2.8b, SHASH2.8b, SHASH2.8b, #2
| ext ss3.8b, SHASH2.8b, SHASH2.8b, #3
| ext ss4.8b, SHASH2.8b, SHASH2.8b, #4
| .endm
|
| //
| // PMULL (64x64->128) based reduction for CPUs that can do
| // it in a single instruction.
| //
| .macro __pmull_reduce_p64
| pmull T2.1q, XL.1d, MASK.1d
| eor XM.16b, XM.16b, T1.16b
|
| mov XH.d[0], XM.d[1]
| mov XM.d[1], XL.d[0]
|
| eor XL.16b, XM.16b, T2.16b
| ext T2.16b, XL.16b, XL.16b, #8
| pmull XL.1q, XL.1d, MASK.1d
| .endm
|
| //
| // Alternative reduction for CPUs that lack support for the
| // 64x64->128 PMULL instruction
| //
| .macro __pmull_reduce_p8
| eor XM.16b, XM.16b, T1.16b
|
| mov XL.d[1], XM.d[0]
| mov XH.d[0], XM.d[1]
|
| shl T1.2d, XL.2d, #57
| shl T2.2d, XL.2d, #62
| eor T2.16b, T2.16b, T1.16b
| shl T1.2d, XL.2d, #63
| eor T2.16b, T2.16b, T1.16b
| ext T1.16b, XL.16b, XH.16b, #8
| eor T2.16b, T2.16b, T1.16b
|
| mov XL.d[1], T2.d[0]
| mov XH.d[0], T2.d[1]
|
| ushr T2.2d, XL.2d, #1
| eor XH.16b, XH.16b, XL.16b
| eor XL.16b, XL.16b, T2.16b
| ushr T2.2d, T2.2d, #6
| ushr XL.2d, XL.2d, #1
| .endm
|
| .macro __pmull_ghash, pn
| ld1 {SHASH.2d}, [x3]
| ld1 {XL.2d}, [x1]
|
| __pmull_pre_\pn
|
| /* do the head block first, if supplied */
| cbz x4, 0f
| ld1 {T1.2d}, [x4]
| mov x4, xzr
| b 3f
|
| 0: .ifc \pn, p64
| tbnz w0, #0, 2f // skip until #blocks is a
| tbnz w0, #1, 2f // round multiple of 4
|
| 1: ld1 {XM3.16b-TT4.16b}, [x2], #64
|
| sub w0, w0, #4
|
| rev64 T1.16b, XM3.16b
| rev64 T2.16b, XH3.16b
| rev64 TT4.16b, TT4.16b
| rev64 TT3.16b, TT3.16b
|
| ext IN1.16b, TT4.16b, TT4.16b, #8
| ext XL3.16b, TT3.16b, TT3.16b, #8
|
| eor TT4.16b, TT4.16b, IN1.16b
| pmull2 XH2.1q, SHASH.2d, IN1.2d // a1 * b1
| pmull XL2.1q, SHASH.1d, IN1.1d // a0 * b0
| pmull XM2.1q, SHASH2.1d, TT4.1d // (a1 + a0)(b1 + b0)
|
| eor TT3.16b, TT3.16b, XL3.16b
| pmull2 XH3.1q, HH.2d, XL3.2d // a1 * b1
| pmull XL3.1q, HH.1d, XL3.1d // a0 * b0
| pmull2 XM3.1q, SHASH2.2d, TT3.2d // (a1 + a0)(b1 + b0)
|
| ext IN1.16b, T2.16b, T2.16b, #8
| eor XL2.16b, XL2.16b, XL3.16b
| eor XH2.16b, XH2.16b, XH3.16b
| eor XM2.16b, XM2.16b, XM3.16b
|
| eor T2.16b, T2.16b, IN1.16b
| pmull2 XH3.1q, HH3.2d, IN1.2d // a1 * b1
| pmull XL3.1q, HH3.1d, IN1.1d // a0 * b0
| pmull XM3.1q, HH34.1d, T2.1d // (a1 + a0)(b1 + b0)
|
| eor XL2.16b, XL2.16b, XL3.16b
| eor XH2.16b, XH2.16b, XH3.16b
| eor XM2.16b, XM2.16b, XM3.16b
|
| ext IN1.16b, T1.16b, T1.16b, #8
| ext TT3.16b, XL.16b, XL.16b, #8
| eor XL.16b, XL.16b, IN1.16b
| eor T1.16b, T1.16b, TT3.16b
|
| pmull2 XH.1q, HH4.2d, XL.2d // a1 * b1
| eor T1.16b, T1.16b, XL.16b
| pmull XL.1q, HH4.1d, XL.1d // a0 * b0
| pmull2 XM.1q, HH34.2d, T1.2d // (a1 + a0)(b1 + b0)
|
| eor XL.16b, XL.16b, XL2.16b
| eor XH.16b, XH.16b, XH2.16b
| eor XM.16b, XM.16b, XM2.16b
|
| eor T2.16b, XL.16b, XH.16b
| ext T1.16b, XL.16b, XH.16b, #8
| eor XM.16b, XM.16b, T2.16b
|
| __pmull_reduce_p64
|
| eor T2.16b, T2.16b, XH.16b
| eor XL.16b, XL.16b, T2.16b
|
| cbz w0, 5f
| b 1b
| .endif
|
| 2: ld1 {T1.2d}, [x2], #16
| sub w0, w0, #1
|
| 3: /* multiply XL by SHASH in GF(2^128) */
| CPU_LE( rev64 T1.16b, T1.16b )
|
| ext T2.16b, XL.16b, XL.16b, #8
| ext IN1.16b, T1.16b, T1.16b, #8
| eor T1.16b, T1.16b, T2.16b
| eor XL.16b, XL.16b, IN1.16b
|
| __pmull2_\pn XH, XL, SHASH // a1 * b1
| eor T1.16b, T1.16b, XL.16b
| __pmull_\pn XL, XL, SHASH // a0 * b0
| __pmull_\pn XM, T1, SHASH2 // (a1 + a0)(b1 + b0)
|
| 4: eor T2.16b, XL.16b, XH.16b
| ext T1.16b, XL.16b, XH.16b, #8
| eor XM.16b, XM.16b, T2.16b
|
| __pmull_reduce_\pn
|
| eor T2.16b, T2.16b, XH.16b
| eor XL.16b, XL.16b, T2.16b
|
| cbnz w0, 0b
|
| 5: st1 {XL.2d}, [x1]
| ret
| .endm
|
| /*
| * void pmull_ghash_update(int blocks, u64 dg[], const char *src,
| * struct ghash_key const *k, const char *head)
| */
| SYM_FUNC_START(pmull_ghash_update_p64)
| __pmull_ghash p64
| SYM_FUNC_END(pmull_ghash_update_p64)
|
| SYM_FUNC_START(pmull_ghash_update_p8)
| __pmull_ghash p8
| SYM_FUNC_END(pmull_ghash_update_p8)
|
| KS0 .req v8
| KS1 .req v9
| KS2 .req v10
| KS3 .req v11
|
| INP0 .req v21
| INP1 .req v22
| INP2 .req v23
| INP3 .req v24
|
| K0 .req v25
| K1 .req v26
| K2 .req v27
| K3 .req v28
| K4 .req v12
| K5 .req v13
| K6 .req v4
| K7 .req v5
| K8 .req v14
| K9 .req v15
| KK .req v29
| KL .req v30
| KM .req v31
|
| .macro load_round_keys, rounds, rk, tmp
| add \tmp, \rk, #64
| ld1 {K0.4s-K3.4s}, [\rk]
| ld1 {K4.4s-K5.4s}, [\tmp]
| add \tmp, \rk, \rounds, lsl #4
| sub \tmp, \tmp, #32
| ld1 {KK.4s-KM.4s}, [\tmp]
| .endm
|
| .macro enc_round, state, key
| aese \state\().16b, \key\().16b
| aesmc \state\().16b, \state\().16b
| .endm
|
| .macro enc_qround, s0, s1, s2, s3, key
| enc_round \s0, \key
| enc_round \s1, \key
| enc_round \s2, \key
| enc_round \s3, \key
| .endm
|
| .macro enc_block, state, rounds, rk, tmp
| add \tmp, \rk, #96
| ld1 {K6.4s-K7.4s}, [\tmp], #32
| .irp key, K0, K1, K2, K3, K4 K5
| enc_round \state, \key
| .endr
|
| tbnz \rounds, #2, .Lnot128_\@
| .Lout256_\@:
| enc_round \state, K6
| enc_round \state, K7
|
| .Lout192_\@:
| enc_round \state, KK
| aese \state\().16b, KL.16b
| eor \state\().16b, \state\().16b, KM.16b
|
| .subsection 1
| .Lnot128_\@:
| ld1 {K8.4s-K9.4s}, [\tmp], #32
| enc_round \state, K6
| enc_round \state, K7
| ld1 {K6.4s-K7.4s}, [\tmp]
| enc_round \state, K8
| enc_round \state, K9
| tbz \rounds, #1, .Lout192_\@
| b .Lout256_\@
| .previous
| .endm
|
| .align 6
| .macro pmull_gcm_do_crypt, enc
| stp x29, x30, [sp, #-32]!
| mov x29, sp
| str x19, [sp, #24]
|
| load_round_keys x7, x6, x8
|
| ld1 {SHASH.2d}, [x3], #16
| ld1 {HH.2d-HH4.2d}, [x3]
|
| trn1 SHASH2.2d, SHASH.2d, HH.2d
| trn2 T1.2d, SHASH.2d, HH.2d
| eor SHASH2.16b, SHASH2.16b, T1.16b
|
| trn1 HH34.2d, HH3.2d, HH4.2d
| trn2 T1.2d, HH3.2d, HH4.2d
| eor HH34.16b, HH34.16b, T1.16b
|
| ld1 {XL.2d}, [x4]
|
| cbz x0, 3f // tag only?
|
| ldr w8, [x5, #12] // load lower counter
| CPU_LE( rev w8, w8 )
|
| 0: mov w9, #4 // max blocks per round
| add x10, x0, #0xf
| lsr x10, x10, #4 // remaining blocks
|
| subs x0, x0, #64
| csel w9, w10, w9, mi
| add w8, w8, w9
|
| bmi 1f
| ld1 {INP0.16b-INP3.16b}, [x2], #64
| .subsection 1
| /*
| * Populate the four input registers right to left with up to 63 bytes
| * of data, using overlapping loads to avoid branches.
| *
| * INP0 INP1 INP2 INP3
| * 1 byte | | | |x |
| * 16 bytes | | | |xxxxxxxx|
| * 17 bytes | | |xxxxxxxx|x |
| * 47 bytes | |xxxxxxxx|xxxxxxxx|xxxxxxx |
| * etc etc
| *
| * Note that this code may read up to 15 bytes before the start of
| * the input. It is up to the calling code to ensure this is safe if
| * this happens in the first iteration of the loop (i.e., when the
| * input size is < 16 bytes)
| */
| 1: mov x15, #16
| ands x19, x0, #0xf
| csel x19, x19, x15, ne
| adr_l x17, .Lpermute_table + 16
|
| sub x11, x15, x19
| add x12, x17, x11
| sub x17, x17, x11
| ld1 {T1.16b}, [x12]
| sub x10, x1, x11
| sub x11, x2, x11
|
| cmp x0, #-16
| csel x14, x15, xzr, gt
| cmp x0, #-32
| csel x15, x15, xzr, gt
| cmp x0, #-48
| csel x16, x19, xzr, gt
| csel x1, x1, x10, gt
| csel x2, x2, x11, gt
|
| ld1 {INP0.16b}, [x2], x14
| ld1 {INP1.16b}, [x2], x15
| ld1 {INP2.16b}, [x2], x16
| ld1 {INP3.16b}, [x2]
| tbl INP3.16b, {INP3.16b}, T1.16b
| b 2f
| .previous
|
| 2: .if \enc == 0
| bl pmull_gcm_ghash_4x
| .endif
|
| bl pmull_gcm_enc_4x
|
| tbnz x0, #63, 6f
| st1 {INP0.16b-INP3.16b}, [x1], #64
| .if \enc == 1
| bl pmull_gcm_ghash_4x
| .endif
| bne 0b
|
| 3: ldp x19, x10, [sp, #24]
| cbz x10, 5f // output tag?
|
| ld1 {INP3.16b}, [x10] // load lengths[]
| mov w9, #1
| bl pmull_gcm_ghash_4x
|
| mov w11, #(0x1 << 24) // BE '1U'
| ld1 {KS0.16b}, [x5]
| mov KS0.s[3], w11
|
| enc_block KS0, x7, x6, x12
|
| ext XL.16b, XL.16b, XL.16b, #8
| rev64 XL.16b, XL.16b
| eor XL.16b, XL.16b, KS0.16b
|
| .if \enc == 1
| st1 {XL.16b}, [x10] // store tag
| .else
| ldp x11, x12, [sp, #40] // load tag pointer and authsize
| adr_l x17, .Lpermute_table
| ld1 {KS0.16b}, [x11] // load supplied tag
| add x17, x17, x12
| ld1 {KS1.16b}, [x17] // load permute vector
|
| cmeq XL.16b, XL.16b, KS0.16b // compare tags
| mvn XL.16b, XL.16b // -1 for fail, 0 for pass
| tbl XL.16b, {XL.16b}, KS1.16b // keep authsize bytes only
| sminv b0, XL.16b // signed minimum across XL
| smov w0, v0.b[0] // return b0
| .endif
|
| 4: ldp x29, x30, [sp], #32
| ret
|
| 5:
| CPU_LE( rev w8, w8 )
| str w8, [x5, #12] // store lower counter
| st1 {XL.2d}, [x4]
| b 4b
|
| 6: ld1 {T1.16b-T2.16b}, [x17], #32 // permute vectors
| sub x17, x17, x19, lsl #1
|
| cmp w9, #1
| beq 7f
| .subsection 1
| 7: ld1 {INP2.16b}, [x1]
| tbx INP2.16b, {INP3.16b}, T1.16b
| mov INP3.16b, INP2.16b
| b 8f
| .previous
|
| st1 {INP0.16b}, [x1], x14
| st1 {INP1.16b}, [x1], x15
| st1 {INP2.16b}, [x1], x16
| tbl INP3.16b, {INP3.16b}, T1.16b
| tbx INP3.16b, {INP2.16b}, T2.16b
| 8: st1 {INP3.16b}, [x1]
|
| .if \enc == 1
| ld1 {T1.16b}, [x17]
| tbl INP3.16b, {INP3.16b}, T1.16b // clear non-data bits
| bl pmull_gcm_ghash_4x
| .endif
| b 3b
| .endm
|
| /*
| * void pmull_gcm_encrypt(int blocks, u8 dst[], const u8 src[],
| * struct ghash_key const *k, u64 dg[], u8 ctr[],
| * int rounds, u8 tag)
| */
| SYM_FUNC_START(pmull_gcm_encrypt)
| pmull_gcm_do_crypt 1
| SYM_FUNC_END(pmull_gcm_encrypt)
|
| /*
| * void pmull_gcm_decrypt(int blocks, u8 dst[], const u8 src[],
| * struct ghash_key const *k, u64 dg[], u8 ctr[],
| * int rounds, u8 tag)
| */
| SYM_FUNC_START(pmull_gcm_decrypt)
| pmull_gcm_do_crypt 0
| SYM_FUNC_END(pmull_gcm_decrypt)
|
| SYM_FUNC_START_LOCAL(pmull_gcm_ghash_4x)
| movi MASK.16b, #0xe1
| shl MASK.2d, MASK.2d, #57
|
| rev64 T1.16b, INP0.16b
| rev64 T2.16b, INP1.16b
| rev64 TT3.16b, INP2.16b
| rev64 TT4.16b, INP3.16b
|
| ext XL.16b, XL.16b, XL.16b, #8
|
| tbz w9, #2, 0f // <4 blocks?
| .subsection 1
| 0: movi XH2.16b, #0
| movi XM2.16b, #0
| movi XL2.16b, #0
|
| tbz w9, #0, 1f // 2 blocks?
| tbz w9, #1, 2f // 1 block?
|
| eor T2.16b, T2.16b, XL.16b
| ext T1.16b, T2.16b, T2.16b, #8
| b .Lgh3
|
| 1: eor TT3.16b, TT3.16b, XL.16b
| ext T2.16b, TT3.16b, TT3.16b, #8
| b .Lgh2
|
| 2: eor TT4.16b, TT4.16b, XL.16b
| ext IN1.16b, TT4.16b, TT4.16b, #8
| b .Lgh1
| .previous
|
| eor T1.16b, T1.16b, XL.16b
| ext IN1.16b, T1.16b, T1.16b, #8
|
| pmull2 XH2.1q, HH4.2d, IN1.2d // a1 * b1
| eor T1.16b, T1.16b, IN1.16b
| pmull XL2.1q, HH4.1d, IN1.1d // a0 * b0
| pmull2 XM2.1q, HH34.2d, T1.2d // (a1 + a0)(b1 + b0)
|
| ext T1.16b, T2.16b, T2.16b, #8
| .Lgh3: eor T2.16b, T2.16b, T1.16b
| pmull2 XH.1q, HH3.2d, T1.2d // a1 * b1
| pmull XL.1q, HH3.1d, T1.1d // a0 * b0
| pmull XM.1q, HH34.1d, T2.1d // (a1 + a0)(b1 + b0)
|
| eor XH2.16b, XH2.16b, XH.16b
| eor XL2.16b, XL2.16b, XL.16b
| eor XM2.16b, XM2.16b, XM.16b
|
| ext T2.16b, TT3.16b, TT3.16b, #8
| .Lgh2: eor TT3.16b, TT3.16b, T2.16b
| pmull2 XH.1q, HH.2d, T2.2d // a1 * b1
| pmull XL.1q, HH.1d, T2.1d // a0 * b0
| pmull2 XM.1q, SHASH2.2d, TT3.2d // (a1 + a0)(b1 + b0)
|
| eor XH2.16b, XH2.16b, XH.16b
| eor XL2.16b, XL2.16b, XL.16b
| eor XM2.16b, XM2.16b, XM.16b
|
| ext IN1.16b, TT4.16b, TT4.16b, #8
| .Lgh1: eor TT4.16b, TT4.16b, IN1.16b
| pmull XL.1q, SHASH.1d, IN1.1d // a0 * b0
| pmull2 XH.1q, SHASH.2d, IN1.2d // a1 * b1
| pmull XM.1q, SHASH2.1d, TT4.1d // (a1 + a0)(b1 + b0)
|
| eor XH.16b, XH.16b, XH2.16b
| eor XL.16b, XL.16b, XL2.16b
| eor XM.16b, XM.16b, XM2.16b
|
| eor T2.16b, XL.16b, XH.16b
| ext T1.16b, XL.16b, XH.16b, #8
| eor XM.16b, XM.16b, T2.16b
|
| __pmull_reduce_p64
|
| eor T2.16b, T2.16b, XH.16b
| eor XL.16b, XL.16b, T2.16b
|
| ret
| SYM_FUNC_END(pmull_gcm_ghash_4x)
|
| SYM_FUNC_START_LOCAL(pmull_gcm_enc_4x)
| ld1 {KS0.16b}, [x5] // load upper counter
| sub w10, w8, #4
| sub w11, w8, #3
| sub w12, w8, #2
| sub w13, w8, #1
| rev w10, w10
| rev w11, w11
| rev w12, w12
| rev w13, w13
| mov KS1.16b, KS0.16b
| mov KS2.16b, KS0.16b
| mov KS3.16b, KS0.16b
| ins KS0.s[3], w10 // set lower counter
| ins KS1.s[3], w11
| ins KS2.s[3], w12
| ins KS3.s[3], w13
|
| add x10, x6, #96 // round key pointer
| ld1 {K6.4s-K7.4s}, [x10], #32
| .irp key, K0, K1, K2, K3, K4, K5
| enc_qround KS0, KS1, KS2, KS3, \key
| .endr
|
| tbnz x7, #2, .Lnot128
| .subsection 1
| .Lnot128:
| ld1 {K8.4s-K9.4s}, [x10], #32
| .irp key, K6, K7
| enc_qround KS0, KS1, KS2, KS3, \key
| .endr
| ld1 {K6.4s-K7.4s}, [x10]
| .irp key, K8, K9
| enc_qround KS0, KS1, KS2, KS3, \key
| .endr
| tbz x7, #1, .Lout192
| b .Lout256
| .previous
|
| .Lout256:
| .irp key, K6, K7
| enc_qround KS0, KS1, KS2, KS3, \key
| .endr
|
| .Lout192:
| enc_qround KS0, KS1, KS2, KS3, KK
|
| aese KS0.16b, KL.16b
| aese KS1.16b, KL.16b
| aese KS2.16b, KL.16b
| aese KS3.16b, KL.16b
|
| eor KS0.16b, KS0.16b, KM.16b
| eor KS1.16b, KS1.16b, KM.16b
| eor KS2.16b, KS2.16b, KM.16b
| eor KS3.16b, KS3.16b, KM.16b
|
| eor INP0.16b, INP0.16b, KS0.16b
| eor INP1.16b, INP1.16b, KS1.16b
| eor INP2.16b, INP2.16b, KS2.16b
| eor INP3.16b, INP3.16b, KS3.16b
|
| ret
| SYM_FUNC_END(pmull_gcm_enc_4x)
|
| .section ".rodata", "a"
| .align 6
| .Lpermute_table:
| .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
| .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
| .byte 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7
| .byte 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf
| .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
| .byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
| .byte 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7
| .byte 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf
| .previous
|
|
