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
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* SM4 Cipher Algorithm for ARMv8 with Crypto Extensions
* as specified in
* https://tools.ietf.org/id/draft-ribose-cfrg-sm4-10.html
*
* Copyright (C) 2022, Alibaba Group.
* Copyright (C) 2022 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#include "sm4-ce-asm.h"
.arch armv8-a+crypto
.irp b, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, \
20, 24, 25, 26, 27, 28, 29, 30, 31
.set .Lv\b\().4s, \b
.endr
.macro sm4e, vd, vn
.inst 0xcec08400 | (.L\vn << 5) | .L\vd
.endm
.macro sm4ekey, vd, vn, vm
.inst 0xce60c800 | (.L\vm << 16) | (.L\vn << 5) | .L\vd
.endm
/* Register macros */
#define RTMP0 v16
#define RTMP1 v17
#define RTMP2 v18
#define RTMP3 v19
#define RIV v20
.align 3
SYM_FUNC_START(sm4_ce_expand_key)
/* input:
* x0: 128-bit key
* x1: rkey_enc
* x2: rkey_dec
* x3: fk array
* x4: ck array
*/
ld1 {v0.16b}, [x0];
rev32 v0.16b, v0.16b;
ld1 {v1.16b}, [x3];
/* load ck */
ld1 {v24.16b-v27.16b}, [x4], #64;
ld1 {v28.16b-v31.16b}, [x4];
/* input ^ fk */
eor v0.16b, v0.16b, v1.16b;
sm4ekey v0.4s, v0.4s, v24.4s;
sm4ekey v1.4s, v0.4s, v25.4s;
sm4ekey v2.4s, v1.4s, v26.4s;
sm4ekey v3.4s, v2.4s, v27.4s;
sm4ekey v4.4s, v3.4s, v28.4s;
sm4ekey v5.4s, v4.4s, v29.4s;
sm4ekey v6.4s, v5.4s, v30.4s;
sm4ekey v7.4s, v6.4s, v31.4s;
adr_l x5, .Lbswap128_mask
ld1 {v24.16b}, [x5]
st1 {v0.16b-v3.16b}, [x1], #64;
st1 {v4.16b-v7.16b}, [x1];
tbl v16.16b, {v7.16b}, v24.16b
tbl v17.16b, {v6.16b}, v24.16b
tbl v18.16b, {v5.16b}, v24.16b
tbl v19.16b, {v4.16b}, v24.16b
tbl v20.16b, {v3.16b}, v24.16b
tbl v21.16b, {v2.16b}, v24.16b
tbl v22.16b, {v1.16b}, v24.16b
tbl v23.16b, {v0.16b}, v24.16b
st1 {v16.16b-v19.16b}, [x2], #64
st1 {v20.16b-v23.16b}, [x2]
ret;
SYM_FUNC_END(sm4_ce_expand_key)
.align 3
SYM_FUNC_START(sm4_ce_crypt_block)
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
*/
SM4_PREPARE(x0)
ld1 {v0.16b}, [x2];
SM4_CRYPT_BLK(v0);
st1 {v0.16b}, [x1];
ret;
SYM_FUNC_END(sm4_ce_crypt_block)
.align 3
SYM_FUNC_START(sm4_ce_crypt)
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* w3: nblocks
*/
SM4_PREPARE(x0)
.Lcrypt_loop_blk:
sub w3, w3, #8;
tbnz w3, #31, .Lcrypt_tail8;
ld1 {v0.16b-v3.16b}, [x2], #64;
ld1 {v4.16b-v7.16b}, [x2], #64;
SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7);
st1 {v0.16b-v3.16b}, [x1], #64;
st1 {v4.16b-v7.16b}, [x1], #64;
cbz w3, .Lcrypt_end;
b .Lcrypt_loop_blk;
.Lcrypt_tail8:
add w3, w3, #8;
cmp w3, #4;
blt .Lcrypt_tail4;
sub w3, w3, #4;
ld1 {v0.16b-v3.16b}, [x2], #64;
SM4_CRYPT_BLK4(v0, v1, v2, v3);
st1 {v0.16b-v3.16b}, [x1], #64;
cbz w3, .Lcrypt_end;
.Lcrypt_tail4:
sub w3, w3, #1;
ld1 {v0.16b}, [x2], #16;
SM4_CRYPT_BLK(v0);
st1 {v0.16b}, [x1], #16;
cbnz w3, .Lcrypt_tail4;
.Lcrypt_end:
ret;
SYM_FUNC_END(sm4_ce_crypt)
.align 3
SYM_FUNC_START(sm4_ce_cbc_enc)
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: iv (big endian, 128 bit)
* w4: nblocks
*/
SM4_PREPARE(x0)
ld1 {RIV.16b}, [x3]
.Lcbc_enc_loop_4x:
cmp w4, #4
blt .Lcbc_enc_loop_1x
sub w4, w4, #4
ld1 {v0.16b-v3.16b}, [x2], #64
eor v0.16b, v0.16b, RIV.16b
SM4_CRYPT_BLK(v0)
eor v1.16b, v1.16b, v0.16b
SM4_CRYPT_BLK(v1)
eor v2.16b, v2.16b, v1.16b
SM4_CRYPT_BLK(v2)
eor v3.16b, v3.16b, v2.16b
SM4_CRYPT_BLK(v3)
st1 {v0.16b-v3.16b}, [x1], #64
mov RIV.16b, v3.16b
cbz w4, .Lcbc_enc_end
b .Lcbc_enc_loop_4x
.Lcbc_enc_loop_1x:
sub w4, w4, #1
ld1 {v0.16b}, [x2], #16
eor RIV.16b, RIV.16b, v0.16b
SM4_CRYPT_BLK(RIV)
st1 {RIV.16b}, [x1], #16
cbnz w4, .Lcbc_enc_loop_1x
.Lcbc_enc_end:
/* store new IV */
st1 {RIV.16b}, [x3]
ret
SYM_FUNC_END(sm4_ce_cbc_enc)
.align 3
SYM_FUNC_START(sm4_ce_cbc_dec)
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: iv (big endian, 128 bit)
* w4: nblocks
*/
SM4_PREPARE(x0)
ld1 {RIV.16b}, [x3]
.Lcbc_dec_loop_8x:
sub w4, w4, #8
tbnz w4, #31, .Lcbc_dec_4x
ld1 {v0.16b-v3.16b}, [x2], #64
ld1 {v4.16b-v7.16b}, [x2], #64
rev32 v8.16b, v0.16b
rev32 v9.16b, v1.16b
rev32 v10.16b, v2.16b
rev32 v11.16b, v3.16b
rev32 v12.16b, v4.16b
rev32 v13.16b, v5.16b
rev32 v14.16b, v6.16b
rev32 v15.16b, v7.16b
SM4_CRYPT_BLK8_BE(v8, v9, v10, v11, v12, v13, v14, v15)
eor v8.16b, v8.16b, RIV.16b
eor v9.16b, v9.16b, v0.16b
eor v10.16b, v10.16b, v1.16b
eor v11.16b, v11.16b, v2.16b
eor v12.16b, v12.16b, v3.16b
eor v13.16b, v13.16b, v4.16b
eor v14.16b, v14.16b, v5.16b
eor v15.16b, v15.16b, v6.16b
st1 {v8.16b-v11.16b}, [x1], #64
st1 {v12.16b-v15.16b}, [x1], #64
mov RIV.16b, v7.16b
cbz w4, .Lcbc_dec_end
b .Lcbc_dec_loop_8x
.Lcbc_dec_4x:
add w4, w4, #8
cmp w4, #4
blt .Lcbc_dec_loop_1x
sub w4, w4, #4
ld1 {v0.16b-v3.16b}, [x2], #64
rev32 v8.16b, v0.16b
rev32 v9.16b, v1.16b
rev32 v10.16b, v2.16b
rev32 v11.16b, v3.16b
SM4_CRYPT_BLK4_BE(v8, v9, v10, v11)
eor v8.16b, v8.16b, RIV.16b
eor v9.16b, v9.16b, v0.16b
eor v10.16b, v10.16b, v1.16b
eor v11.16b, v11.16b, v2.16b
st1 {v8.16b-v11.16b}, [x1], #64
mov RIV.16b, v3.16b
cbz w4, .Lcbc_dec_end
.Lcbc_dec_loop_1x:
sub w4, w4, #1
ld1 {v0.16b}, [x2], #16
rev32 v8.16b, v0.16b
SM4_CRYPT_BLK_BE(v8)
eor v8.16b, v8.16b, RIV.16b
st1 {v8.16b}, [x1], #16
mov RIV.16b, v0.16b
cbnz w4, .Lcbc_dec_loop_1x
.Lcbc_dec_end:
/* store new IV */
st1 {RIV.16b}, [x3]
ret
SYM_FUNC_END(sm4_ce_cbc_dec)
.align 3
SYM_FUNC_START(sm4_ce_cfb_enc)
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: iv (big endian, 128 bit)
* w4: nblocks
*/
SM4_PREPARE(x0)
ld1 {RIV.16b}, [x3]
.Lcfb_enc_loop_4x:
cmp w4, #4
blt .Lcfb_enc_loop_1x
sub w4, w4, #4
ld1 {v0.16b-v3.16b}, [x2], #64
rev32 v8.16b, RIV.16b
SM4_CRYPT_BLK_BE(v8)
eor v0.16b, v0.16b, v8.16b
rev32 v8.16b, v0.16b
SM4_CRYPT_BLK_BE(v8)
eor v1.16b, v1.16b, v8.16b
rev32 v8.16b, v1.16b
SM4_CRYPT_BLK_BE(v8)
eor v2.16b, v2.16b, v8.16b
rev32 v8.16b, v2.16b
SM4_CRYPT_BLK_BE(v8)
eor v3.16b, v3.16b, v8.16b
st1 {v0.16b-v3.16b}, [x1], #64
mov RIV.16b, v3.16b
cbz w4, .Lcfb_enc_end
b .Lcfb_enc_loop_4x
.Lcfb_enc_loop_1x:
sub w4, w4, #1
ld1 {v0.16b}, [x2], #16
SM4_CRYPT_BLK(RIV)
eor RIV.16b, RIV.16b, v0.16b
st1 {RIV.16b}, [x1], #16
cbnz w4, .Lcfb_enc_loop_1x
.Lcfb_enc_end:
/* store new IV */
st1 {RIV.16b}, [x3]
ret
SYM_FUNC_END(sm4_ce_cfb_enc)
.align 3
SYM_FUNC_START(sm4_ce_cfb_dec)
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: iv (big endian, 128 bit)
* w4: nblocks
*/
SM4_PREPARE(x0)
ld1 {RIV.16b}, [x3]
.Lcfb_dec_loop_8x:
sub w4, w4, #8
tbnz w4, #31, .Lcfb_dec_4x
ld1 {v0.16b-v3.16b}, [x2], #64
ld1 {v4.16b-v7.16b}, [x2], #64
rev32 v8.16b, RIV.16b
rev32 v9.16b, v0.16b
rev32 v10.16b, v1.16b
rev32 v11.16b, v2.16b
rev32 v12.16b, v3.16b
rev32 v13.16b, v4.16b
rev32 v14.16b, v5.16b
rev32 v15.16b, v6.16b
SM4_CRYPT_BLK8_BE(v8, v9, v10, v11, v12, v13, v14, v15)
mov RIV.16b, v7.16b
eor v0.16b, v0.16b, v8.16b
eor v1.16b, v1.16b, v9.16b
eor v2.16b, v2.16b, v10.16b
eor v3.16b, v3.16b, v11.16b
eor v4.16b, v4.16b, v12.16b
eor v5.16b, v5.16b, v13.16b
eor v6.16b, v6.16b, v14.16b
eor v7.16b, v7.16b, v15.16b
st1 {v0.16b-v3.16b}, [x1], #64
st1 {v4.16b-v7.16b}, [x1], #64
cbz w4, .Lcfb_dec_end
b .Lcfb_dec_loop_8x
.Lcfb_dec_4x:
add w4, w4, #8
cmp w4, #4
blt .Lcfb_dec_loop_1x
sub w4, w4, #4
ld1 {v0.16b-v3.16b}, [x2], #64
rev32 v8.16b, RIV.16b
rev32 v9.16b, v0.16b
rev32 v10.16b, v1.16b
rev32 v11.16b, v2.16b
SM4_CRYPT_BLK4_BE(v8, v9, v10, v11)
mov RIV.16b, v3.16b
eor v0.16b, v0.16b, v8.16b
eor v1.16b, v1.16b, v9.16b
eor v2.16b, v2.16b, v10.16b
eor v3.16b, v3.16b, v11.16b
st1 {v0.16b-v3.16b}, [x1], #64
cbz w4, .Lcfb_dec_end
.Lcfb_dec_loop_1x:
sub w4, w4, #1
ld1 {v0.16b}, [x2], #16
SM4_CRYPT_BLK(RIV)
eor RIV.16b, RIV.16b, v0.16b
st1 {RIV.16b}, [x1], #16
mov RIV.16b, v0.16b
cbnz w4, .Lcfb_dec_loop_1x
.Lcfb_dec_end:
/* store new IV */
st1 {RIV.16b}, [x3]
ret
SYM_FUNC_END(sm4_ce_cfb_dec)
.align 3
SYM_FUNC_START(sm4_ce_ctr_enc)
/* input:
* x0: round key array, CTX
* x1: dst
* x2: src
* x3: ctr (big endian, 128 bit)
* w4: nblocks
*/
SM4_PREPARE(x0)
ldp x7, x8, [x3]
rev x7, x7
rev x8, x8
.Lctr_loop_8x:
sub w4, w4, #8
tbnz w4, #31, .Lctr_4x
#define inc_le128(vctr) \
mov vctr.d[1], x8; \
mov vctr.d[0], x7; \
adds x8, x8, #1; \
rev64 vctr.16b, vctr.16b; \
adc x7, x7, xzr;
/* construct CTRs */
inc_le128(v0) /* +0 */
inc_le128(v1) /* +1 */
inc_le128(v2) /* +2 */
inc_le128(v3) /* +3 */
inc_le128(v4) /* +4 */
inc_le128(v5) /* +5 */
inc_le128(v6) /* +6 */
inc_le128(v7) /* +7 */
ld1 {v8.16b-v11.16b}, [x2], #64
ld1 {v12.16b-v15.16b}, [x2], #64
SM4_CRYPT_BLK8(v0, v1, v2, v3, v4, v5, v6, v7)
eor v0.16b, v0.16b, v8.16b
eor v1.16b, v1.16b, v9.16b
eor v2.16b, v2.16b, v10.16b
eor v3.16b, v3.16b, v11.16b
eor v4.16b, v4.16b, v12.16b
eor v5.16b, v5.16b, v13.16b
eor v6.16b, v6.16b, v14.16b
eor v7.16b, v7.16b, v15.16b
st1 {v0.16b-v3.16b}, [x1], #64
st1 {v4.16b-v7.16b}, [x1], #64
cbz w4, .Lctr_end
b .Lctr_loop_8x
.Lctr_4x:
add w4, w4, #8
cmp w4, #4
blt .Lctr_loop_1x
sub w4, w4, #4
/* construct CTRs */
inc_le128(v0) /* +0 */
inc_le128(v1) /* +1 */
inc_le128(v2) /* +2 */
inc_le128(v3) /* +3 */
ld1 {v8.16b-v11.16b}, [x2], #64
SM4_CRYPT_BLK4(v0, v1, v2, v3)
eor v0.16b, v0.16b, v8.16b
eor v1.16b, v1.16b, v9.16b
eor v2.16b, v2.16b, v10.16b
eor v3.16b, v3.16b, v11.16b
st1 {v0.16b-v3.16b}, [x1], #64
cbz w4, .Lctr_end
.Lctr_loop_1x:
sub w4, w4, #1
/* construct CTRs */
inc_le128(v0)
ld1 {v8.16b}, [x2], #16
SM4_CRYPT_BLK(v0)
eor v0.16b, v0.16b, v8.16b
st1 {v0.16b}, [x1], #16
cbnz w4, .Lctr_loop_1x
.Lctr_end:
/* store new CTR */
rev x7, x7
rev x8, x8
stp x7, x8, [x3]
ret
SYM_FUNC_END(sm4_ce_ctr_enc)
.section ".rodata", "a"
.align 4
.Lbswap128_mask:
.byte 0x0c, 0x0d, 0x0e, 0x0f, 0x08, 0x09, 0x0a, 0x0b
.byte 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03
|
