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
|
// salsa.cpp - written and placed in the public domain by Wei Dai
// use "cl /EP /P /DCRYPTOPP_GENERATE_X64_MASM salsa.cpp" to generate MASM code
#include "pch.h"
#ifndef CRYPTOPP_GENERATE_X64_MASM
#include "salsa.h"
#include "misc.h"
#include "argnames.h"
#include "cpu.h"
NAMESPACE_BEGIN(CryptoPP)
void Salsa20_TestInstantiations()
{
Salsa20::Encryption x;
}
void Salsa20_Policy::CipherSetKey(const NameValuePairs ¶ms, const byte *key, size_t length)
{
m_rounds = params.GetIntValueWithDefault(Name::Rounds(), 20);
if (!(m_rounds == 8 || m_rounds == 12 || m_rounds == 20))
throw InvalidRounds(Salsa20::StaticAlgorithmName(), m_rounds);
// m_state is reordered for SSE2
GetBlock<word32, LittleEndian> get1(key);
get1(m_state[13])(m_state[10])(m_state[7])(m_state[4]);
GetBlock<word32, LittleEndian> get2(key + length - 16);
get2(m_state[15])(m_state[12])(m_state[9])(m_state[6]);
// "expand 16-byte k" or "expand 32-byte k"
m_state[0] = 0x61707865;
m_state[1] = (length == 16) ? 0x3120646e : 0x3320646e;
m_state[2] = (length == 16) ? 0x79622d36 : 0x79622d32;
m_state[3] = 0x6b206574;
}
void Salsa20_Policy::CipherResynchronize(byte *keystreamBuffer, const byte *IV, size_t length)
{
assert(length==8);
GetBlock<word32, LittleEndian> get(IV);
get(m_state[14])(m_state[11]);
m_state[8] = m_state[5] = 0;
}
void Salsa20_Policy::SeekToIteration(lword iterationCount)
{
m_state[8] = (word32)iterationCount;
m_state[5] = (word32)SafeRightShift<32>(iterationCount);
}
#if CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X64
unsigned int Salsa20_Policy::GetAlignment() const
{
#if CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE
if (HasSSE2())
return 16;
else
#endif
return GetAlignmentOf<word32>();
}
unsigned int Salsa20_Policy::GetOptimalBlockSize() const
{
#if CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE
if (HasSSE2())
return 4*BYTES_PER_ITERATION;
else
#endif
return BYTES_PER_ITERATION;
}
#endif
#ifdef CRYPTOPP_X64_MASM_AVAILABLE
extern "C" {
void Salsa20_OperateKeystream(byte *output, const byte *input, size_t iterationCount, int rounds, void *state);
}
#endif
#pragma warning(disable: 4731) // frame pointer register 'ebp' modified by inline assembly code
void Salsa20_Policy::OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount)
{
#endif // #ifdef CRYPTOPP_GENERATE_X64_MASM
#ifdef CRYPTOPP_X64_MASM_AVAILABLE
Salsa20_OperateKeystream(output, input, iterationCount, m_rounds, m_state.data());
return;
#endif
#if CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE
#ifdef CRYPTOPP_GENERATE_X64_MASM
ALIGN 8
Salsa20_OperateKeystream PROC FRAME
mov r10, [rsp + 5*8] ; state
alloc_stack(10*16 + 32*16 + 8)
save_xmm128 xmm6, 0200h
save_xmm128 xmm7, 0210h
save_xmm128 xmm8, 0220h
save_xmm128 xmm9, 0230h
save_xmm128 xmm10, 0240h
save_xmm128 xmm11, 0250h
save_xmm128 xmm12, 0260h
save_xmm128 xmm13, 0270h
save_xmm128 xmm14, 0280h
save_xmm128 xmm15, 0290h
.endprolog
#define REG_output rcx
#define REG_input rdx
#define REG_iterationCount r8
#define REG_state r10
#define REG_rounds e9d
#define REG_roundsLeft eax
#define REG_temp32 r11d
#define REG_temp r11
#define SSE2_WORKSPACE rsp
#else
if (HasSSE2())
{
#if CRYPTOPP_BOOL_X64
#define REG_output %4
#define REG_input %1
#define REG_iterationCount %2
#define REG_state %3
#define REG_rounds %0
#define REG_roundsLeft eax
#define REG_temp32 edx
#define REG_temp rdx
#define SSE2_WORKSPACE %5
FixedSizeAlignedSecBlock<byte, 32*16> workspace;
#else
#define REG_output edi
#define REG_input eax
#define REG_iterationCount ecx
#define REG_state esi
#define REG_rounds edx
#define REG_roundsLeft ebx
#define REG_temp32 ebp
#define REG_temp ebp
#define SSE2_WORKSPACE esp + WORD_SZ
#endif
#ifdef __GNUC__
__asm__ __volatile__
(
".intel_syntax noprefix;"
AS_PUSH_IF86( bx)
#else
void *s = m_state.data();
word32 r = m_rounds;
AS2( mov REG_iterationCount, iterationCount)
AS2( mov REG_input, input)
AS2( mov REG_output, output)
AS2( mov REG_state, s)
AS2( mov REG_rounds, r)
#endif
#endif // #ifndef CRYPTOPP_GENERATE_X64_MASM
AS_PUSH_IF86( bp)
AS2( cmp REG_iterationCount, 4)
ASJ( jl, 5, f)
#if CRYPTOPP_BOOL_X86
AS2( mov ebx, esp)
AS2( and esp, -16)
AS2( sub esp, 32*16)
AS1( push ebx)
#endif
#define SSE2_EXPAND_S(i, j) \
ASS( pshufd xmm4, xmm##i, j, j, j, j) \
AS2( movdqa [SSE2_WORKSPACE + (i*4+j)*16 + 256], xmm4)
AS2( movdqa xmm0, [REG_state + 0*16])
AS2( movdqa xmm1, [REG_state + 1*16])
AS2( movdqa xmm2, [REG_state + 2*16])
AS2( movdqa xmm3, [REG_state + 3*16])
SSE2_EXPAND_S(0, 0)
SSE2_EXPAND_S(0, 1)
SSE2_EXPAND_S(0, 2)
SSE2_EXPAND_S(0, 3)
SSE2_EXPAND_S(1, 0)
SSE2_EXPAND_S(1, 2)
SSE2_EXPAND_S(1, 3)
SSE2_EXPAND_S(2, 1)
SSE2_EXPAND_S(2, 2)
SSE2_EXPAND_S(2, 3)
SSE2_EXPAND_S(3, 0)
SSE2_EXPAND_S(3, 1)
SSE2_EXPAND_S(3, 2)
SSE2_EXPAND_S(3, 3)
#define SSE2_EXPAND_S85(i) \
AS2( mov dword ptr [SSE2_WORKSPACE + 8*16 + i*4 + 256], REG_roundsLeft) \
AS2( mov dword ptr [SSE2_WORKSPACE + 5*16 + i*4 + 256], REG_temp32) \
AS2( add REG_roundsLeft, 1) \
AS2( adc REG_temp32, 0)
ASL(1)
AS2( mov REG_roundsLeft, dword ptr [REG_state + 8*4])
AS2( mov REG_temp32, dword ptr [REG_state + 5*4])
SSE2_EXPAND_S85(0)
SSE2_EXPAND_S85(1)
SSE2_EXPAND_S85(2)
SSE2_EXPAND_S85(3)
AS2( mov dword ptr [REG_state + 8*4], REG_roundsLeft)
AS2( mov dword ptr [REG_state + 5*4], REG_temp32)
#define SSE2_QUARTER_ROUND(a, b, d, i) \
AS2( movdqa xmm4, xmm##d) \
AS2( paddd xmm4, xmm##a) \
AS2( movdqa xmm5, xmm4) \
AS2( pslld xmm4, i) \
AS2( psrld xmm5, 32-i) \
AS2( pxor xmm##b, xmm4) \
AS2( pxor xmm##b, xmm5)
#define L01(A,B,C,D,a,b,c,d,i) AS2( movdqa xmm##A, [SSE2_WORKSPACE + d*16 + i*256]) /* y3 */
#define L02(A,B,C,D,a,b,c,d,i) AS2( movdqa xmm##C, [SSE2_WORKSPACE + a*16 + i*256]) /* y0 */
#define L03(A,B,C,D,a,b,c,d,i) AS2( paddd xmm##A, xmm##C) /* y0+y3 */
#define L04(A,B,C,D,a,b,c,d,i) AS2( movdqa xmm##B, xmm##A)
#define L05(A,B,C,D,a,b,c,d,i) AS2( pslld xmm##A, 7)
#define L06(A,B,C,D,a,b,c,d,i) AS2( psrld xmm##B, 32-7)
#define L07(A,B,C,D,a,b,c,d,i) AS2( pxor xmm##A, [SSE2_WORKSPACE + b*16 + i*256])
#define L08(A,B,C,D,a,b,c,d,i) AS2( pxor xmm##A, xmm##B) /* z1 */
#define L09(A,B,C,D,a,b,c,d,i) AS2( movdqa [SSE2_WORKSPACE + b*16], xmm##A)
#define L10(A,B,C,D,a,b,c,d,i) AS2( movdqa xmm##B, xmm##A)
#define L11(A,B,C,D,a,b,c,d,i) AS2( paddd xmm##A, xmm##C) /* z1+y0 */
#define L12(A,B,C,D,a,b,c,d,i) AS2( movdqa xmm##D, xmm##A)
#define L13(A,B,C,D,a,b,c,d,i) AS2( pslld xmm##A, 9)
#define L14(A,B,C,D,a,b,c,d,i) AS2( psrld xmm##D, 32-9)
#define L15(A,B,C,D,a,b,c,d,i) AS2( pxor xmm##A, [SSE2_WORKSPACE + c*16 + i*256])
#define L16(A,B,C,D,a,b,c,d,i) AS2( pxor xmm##A, xmm##D) /* z2 */
#define L17(A,B,C,D,a,b,c,d,i) AS2( movdqa [SSE2_WORKSPACE + c*16], xmm##A)
#define L18(A,B,C,D,a,b,c,d,i) AS2( movdqa xmm##D, xmm##A)
#define L19(A,B,C,D,a,b,c,d,i) AS2( paddd xmm##A, xmm##B) /* z2+z1 */
#define L20(A,B,C,D,a,b,c,d,i) AS2( movdqa xmm##B, xmm##A)
#define L21(A,B,C,D,a,b,c,d,i) AS2( pslld xmm##A, 13)
#define L22(A,B,C,D,a,b,c,d,i) AS2( psrld xmm##B, 32-13)
#define L23(A,B,C,D,a,b,c,d,i) AS2( pxor xmm##A, [SSE2_WORKSPACE + d*16 + i*256])
#define L24(A,B,C,D,a,b,c,d,i) AS2( pxor xmm##A, xmm##B) /* z3 */
#define L25(A,B,C,D,a,b,c,d,i) AS2( movdqa [SSE2_WORKSPACE + d*16], xmm##A)
#define L26(A,B,C,D,a,b,c,d,i) AS2( paddd xmm##A, xmm##D) /* z3+z2 */
#define L27(A,B,C,D,a,b,c,d,i) AS2( movdqa xmm##D, xmm##A)
#define L28(A,B,C,D,a,b,c,d,i) AS2( pslld xmm##A, 18)
#define L29(A,B,C,D,a,b,c,d,i) AS2( psrld xmm##D, 32-18)
#define L30(A,B,C,D,a,b,c,d,i) AS2( pxor xmm##A, xmm##C) /* xor y0 */
#define L31(A,B,C,D,a,b,c,d,i) AS2( pxor xmm##A, xmm##D) /* z0 */
#define L32(A,B,C,D,a,b,c,d,i) AS2( movdqa [SSE2_WORKSPACE + a*16], xmm##A)
#define SSE2_QUARTER_ROUND_X8(i, a, b, c, d, e, f, g, h) \
L01(0,1,2,3, a,b,c,d, i) L01(4,5,6,7, e,f,g,h, i) \
L02(0,1,2,3, a,b,c,d, i) L02(4,5,6,7, e,f,g,h, i) \
L03(0,1,2,3, a,b,c,d, i) L03(4,5,6,7, e,f,g,h, i) \
L04(0,1,2,3, a,b,c,d, i) L04(4,5,6,7, e,f,g,h, i) \
L05(0,1,2,3, a,b,c,d, i) L05(4,5,6,7, e,f,g,h, i) \
L06(0,1,2,3, a,b,c,d, i) L06(4,5,6,7, e,f,g,h, i) \
L07(0,1,2,3, a,b,c,d, i) L07(4,5,6,7, e,f,g,h, i) \
L08(0,1,2,3, a,b,c,d, i) L08(4,5,6,7, e,f,g,h, i) \
L09(0,1,2,3, a,b,c,d, i) L09(4,5,6,7, e,f,g,h, i) \
L10(0,1,2,3, a,b,c,d, i) L10(4,5,6,7, e,f,g,h, i) \
L11(0,1,2,3, a,b,c,d, i) L11(4,5,6,7, e,f,g,h, i) \
L12(0,1,2,3, a,b,c,d, i) L12(4,5,6,7, e,f,g,h, i) \
L13(0,1,2,3, a,b,c,d, i) L13(4,5,6,7, e,f,g,h, i) \
L14(0,1,2,3, a,b,c,d, i) L14(4,5,6,7, e,f,g,h, i) \
L15(0,1,2,3, a,b,c,d, i) L15(4,5,6,7, e,f,g,h, i) \
L16(0,1,2,3, a,b,c,d, i) L16(4,5,6,7, e,f,g,h, i) \
L17(0,1,2,3, a,b,c,d, i) L17(4,5,6,7, e,f,g,h, i) \
L18(0,1,2,3, a,b,c,d, i) L18(4,5,6,7, e,f,g,h, i) \
L19(0,1,2,3, a,b,c,d, i) L19(4,5,6,7, e,f,g,h, i) \
L20(0,1,2,3, a,b,c,d, i) L20(4,5,6,7, e,f,g,h, i) \
L21(0,1,2,3, a,b,c,d, i) L21(4,5,6,7, e,f,g,h, i) \
L22(0,1,2,3, a,b,c,d, i) L22(4,5,6,7, e,f,g,h, i) \
L23(0,1,2,3, a,b,c,d, i) L23(4,5,6,7, e,f,g,h, i) \
L24(0,1,2,3, a,b,c,d, i) L24(4,5,6,7, e,f,g,h, i) \
L25(0,1,2,3, a,b,c,d, i) L25(4,5,6,7, e,f,g,h, i) \
L26(0,1,2,3, a,b,c,d, i) L26(4,5,6,7, e,f,g,h, i) \
L27(0,1,2,3, a,b,c,d, i) L27(4,5,6,7, e,f,g,h, i) \
L28(0,1,2,3, a,b,c,d, i) L28(4,5,6,7, e,f,g,h, i) \
L29(0,1,2,3, a,b,c,d, i) L29(4,5,6,7, e,f,g,h, i) \
L30(0,1,2,3, a,b,c,d, i) L30(4,5,6,7, e,f,g,h, i) \
L31(0,1,2,3, a,b,c,d, i) L31(4,5,6,7, e,f,g,h, i) \
L32(0,1,2,3, a,b,c,d, i) L32(4,5,6,7, e,f,g,h, i)
#define SSE2_QUARTER_ROUND_X16(i, a, b, c, d, e, f, g, h, A, B, C, D, E, F, G, H) \
L01(0,1,2,3, a,b,c,d, i) L01(4,5,6,7, e,f,g,h, i) L01(8,9,10,11, A,B,C,D, i) L01(12,13,14,15, E,F,G,H, i) \
L02(0,1,2,3, a,b,c,d, i) L02(4,5,6,7, e,f,g,h, i) L02(8,9,10,11, A,B,C,D, i) L02(12,13,14,15, E,F,G,H, i) \
L03(0,1,2,3, a,b,c,d, i) L03(4,5,6,7, e,f,g,h, i) L03(8,9,10,11, A,B,C,D, i) L03(12,13,14,15, E,F,G,H, i) \
L04(0,1,2,3, a,b,c,d, i) L04(4,5,6,7, e,f,g,h, i) L04(8,9,10,11, A,B,C,D, i) L04(12,13,14,15, E,F,G,H, i) \
L05(0,1,2,3, a,b,c,d, i) L05(4,5,6,7, e,f,g,h, i) L05(8,9,10,11, A,B,C,D, i) L05(12,13,14,15, E,F,G,H, i) \
L06(0,1,2,3, a,b,c,d, i) L06(4,5,6,7, e,f,g,h, i) L06(8,9,10,11, A,B,C,D, i) L06(12,13,14,15, E,F,G,H, i) \
L07(0,1,2,3, a,b,c,d, i) L07(4,5,6,7, e,f,g,h, i) L07(8,9,10,11, A,B,C,D, i) L07(12,13,14,15, E,F,G,H, i) \
L08(0,1,2,3, a,b,c,d, i) L08(4,5,6,7, e,f,g,h, i) L08(8,9,10,11, A,B,C,D, i) L08(12,13,14,15, E,F,G,H, i) \
L09(0,1,2,3, a,b,c,d, i) L09(4,5,6,7, e,f,g,h, i) L09(8,9,10,11, A,B,C,D, i) L09(12,13,14,15, E,F,G,H, i) \
L10(0,1,2,3, a,b,c,d, i) L10(4,5,6,7, e,f,g,h, i) L10(8,9,10,11, A,B,C,D, i) L10(12,13,14,15, E,F,G,H, i) \
L11(0,1,2,3, a,b,c,d, i) L11(4,5,6,7, e,f,g,h, i) L11(8,9,10,11, A,B,C,D, i) L11(12,13,14,15, E,F,G,H, i) \
L12(0,1,2,3, a,b,c,d, i) L12(4,5,6,7, e,f,g,h, i) L12(8,9,10,11, A,B,C,D, i) L12(12,13,14,15, E,F,G,H, i) \
L13(0,1,2,3, a,b,c,d, i) L13(4,5,6,7, e,f,g,h, i) L13(8,9,10,11, A,B,C,D, i) L13(12,13,14,15, E,F,G,H, i) \
L14(0,1,2,3, a,b,c,d, i) L14(4,5,6,7, e,f,g,h, i) L14(8,9,10,11, A,B,C,D, i) L14(12,13,14,15, E,F,G,H, i) \
L15(0,1,2,3, a,b,c,d, i) L15(4,5,6,7, e,f,g,h, i) L15(8,9,10,11, A,B,C,D, i) L15(12,13,14,15, E,F,G,H, i) \
L16(0,1,2,3, a,b,c,d, i) L16(4,5,6,7, e,f,g,h, i) L16(8,9,10,11, A,B,C,D, i) L16(12,13,14,15, E,F,G,H, i) \
L17(0,1,2,3, a,b,c,d, i) L17(4,5,6,7, e,f,g,h, i) L17(8,9,10,11, A,B,C,D, i) L17(12,13,14,15, E,F,G,H, i) \
L18(0,1,2,3, a,b,c,d, i) L18(4,5,6,7, e,f,g,h, i) L18(8,9,10,11, A,B,C,D, i) L18(12,13,14,15, E,F,G,H, i) \
L19(0,1,2,3, a,b,c,d, i) L19(4,5,6,7, e,f,g,h, i) L19(8,9,10,11, A,B,C,D, i) L19(12,13,14,15, E,F,G,H, i) \
L20(0,1,2,3, a,b,c,d, i) L20(4,5,6,7, e,f,g,h, i) L20(8,9,10,11, A,B,C,D, i) L20(12,13,14,15, E,F,G,H, i) \
L21(0,1,2,3, a,b,c,d, i) L21(4,5,6,7, e,f,g,h, i) L21(8,9,10,11, A,B,C,D, i) L21(12,13,14,15, E,F,G,H, i) \
L22(0,1,2,3, a,b,c,d, i) L22(4,5,6,7, e,f,g,h, i) L22(8,9,10,11, A,B,C,D, i) L22(12,13,14,15, E,F,G,H, i) \
L23(0,1,2,3, a,b,c,d, i) L23(4,5,6,7, e,f,g,h, i) L23(8,9,10,11, A,B,C,D, i) L23(12,13,14,15, E,F,G,H, i) \
L24(0,1,2,3, a,b,c,d, i) L24(4,5,6,7, e,f,g,h, i) L24(8,9,10,11, A,B,C,D, i) L24(12,13,14,15, E,F,G,H, i) \
L25(0,1,2,3, a,b,c,d, i) L25(4,5,6,7, e,f,g,h, i) L25(8,9,10,11, A,B,C,D, i) L25(12,13,14,15, E,F,G,H, i) \
L26(0,1,2,3, a,b,c,d, i) L26(4,5,6,7, e,f,g,h, i) L26(8,9,10,11, A,B,C,D, i) L26(12,13,14,15, E,F,G,H, i) \
L27(0,1,2,3, a,b,c,d, i) L27(4,5,6,7, e,f,g,h, i) L27(8,9,10,11, A,B,C,D, i) L27(12,13,14,15, E,F,G,H, i) \
L28(0,1,2,3, a,b,c,d, i) L28(4,5,6,7, e,f,g,h, i) L28(8,9,10,11, A,B,C,D, i) L28(12,13,14,15, E,F,G,H, i) \
L29(0,1,2,3, a,b,c,d, i) L29(4,5,6,7, e,f,g,h, i) L29(8,9,10,11, A,B,C,D, i) L29(12,13,14,15, E,F,G,H, i) \
L30(0,1,2,3, a,b,c,d, i) L30(4,5,6,7, e,f,g,h, i) L30(8,9,10,11, A,B,C,D, i) L30(12,13,14,15, E,F,G,H, i) \
L31(0,1,2,3, a,b,c,d, i) L31(4,5,6,7, e,f,g,h, i) L31(8,9,10,11, A,B,C,D, i) L31(12,13,14,15, E,F,G,H, i) \
L32(0,1,2,3, a,b,c,d, i) L32(4,5,6,7, e,f,g,h, i) L32(8,9,10,11, A,B,C,D, i) L32(12,13,14,15, E,F,G,H, i)
#if CRYPTOPP_BOOL_X64
SSE2_QUARTER_ROUND_X16(1, 0, 4, 8, 12, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15)
#else
SSE2_QUARTER_ROUND_X8(1, 2, 6, 10, 14, 3, 7, 11, 15)
SSE2_QUARTER_ROUND_X8(1, 0, 4, 8, 12, 1, 5, 9, 13)
#endif
AS2( mov REG_roundsLeft, REG_rounds)
ASJ( jmp, 2, f)
ASL(SSE2_Salsa_Output)
AS2( movdqa xmm0, xmm4)
AS2( punpckldq xmm4, xmm5)
AS2( movdqa xmm1, xmm6)
AS2( punpckldq xmm6, xmm7)
AS2( movdqa xmm2, xmm4)
AS2( punpcklqdq xmm4, xmm6) // e
AS2( punpckhqdq xmm2, xmm6) // f
AS2( punpckhdq xmm0, xmm5)
AS2( punpckhdq xmm1, xmm7)
AS2( movdqa xmm6, xmm0)
AS2( punpcklqdq xmm0, xmm1) // g
AS2( punpckhqdq xmm6, xmm1) // h
AS_XMM_OUTPUT4(SSE2_Salsa_Output_A, REG_input, REG_output, 4, 2, 0, 6, 1, 0, 4, 8, 12, 1)
AS1( ret)
ASL(6)
#if CRYPTOPP_BOOL_X64
SSE2_QUARTER_ROUND_X16(0, 0, 4, 8, 12, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15)
ASL(2)
SSE2_QUARTER_ROUND_X16(0, 0, 13, 10, 7, 1, 14, 11, 4, 2, 15, 8, 5, 3, 12, 9, 6)
#else
SSE2_QUARTER_ROUND_X8(0, 2, 6, 10, 14, 3, 7, 11, 15)
SSE2_QUARTER_ROUND_X8(0, 0, 4, 8, 12, 1, 5, 9, 13)
ASL(2)
SSE2_QUARTER_ROUND_X8(0, 2, 15, 8, 5, 3, 12, 9, 6)
SSE2_QUARTER_ROUND_X8(0, 0, 13, 10, 7, 1, 14, 11, 4)
#endif
AS2( sub REG_roundsLeft, 2)
ASJ( jnz, 6, b)
#define SSE2_OUTPUT_4(a, b, c, d) \
AS2( movdqa xmm4, [SSE2_WORKSPACE + a*16 + 256])\
AS2( paddd xmm4, [SSE2_WORKSPACE + a*16])\
AS2( movdqa xmm5, [SSE2_WORKSPACE + b*16 + 256])\
AS2( paddd xmm5, [SSE2_WORKSPACE + b*16])\
AS2( movdqa xmm6, [SSE2_WORKSPACE + c*16 + 256])\
AS2( paddd xmm6, [SSE2_WORKSPACE + c*16])\
AS2( movdqa xmm7, [SSE2_WORKSPACE + d*16 + 256])\
AS2( paddd xmm7, [SSE2_WORKSPACE + d*16])\
ASC( call, SSE2_Salsa_Output)
SSE2_OUTPUT_4(0, 13, 10, 7)
SSE2_OUTPUT_4(4, 1, 14, 11)
SSE2_OUTPUT_4(8, 5, 2, 15)
SSE2_OUTPUT_4(12, 9, 6, 3)
AS2( test REG_input, REG_input)
ASJ( jz, 9, f)
AS2( add REG_input, 12*16)
ASL(9)
AS2( add REG_output, 12*16)
AS2( sub REG_iterationCount, 4)
AS2( cmp REG_iterationCount, 4)
ASJ( jge, 1, b)
AS_POP_IF86( sp)
ASL(5)
AS2( sub REG_iterationCount, 1)
ASJ( jl, 4, f)
AS2( movdqa xmm0, [REG_state + 0*16])
AS2( movdqa xmm1, [REG_state + 1*16])
AS2( movdqa xmm2, [REG_state + 2*16])
AS2( movdqa xmm3, [REG_state + 3*16])
AS2( mov REG_roundsLeft, REG_rounds)
ASL(0)
SSE2_QUARTER_ROUND(0, 1, 3, 7)
SSE2_QUARTER_ROUND(1, 2, 0, 9)
SSE2_QUARTER_ROUND(2, 3, 1, 13)
SSE2_QUARTER_ROUND(3, 0, 2, 18)
ASS( pshufd xmm1, xmm1, 2, 1, 0, 3)
ASS( pshufd xmm2, xmm2, 1, 0, 3, 2)
ASS( pshufd xmm3, xmm3, 0, 3, 2, 1)
SSE2_QUARTER_ROUND(0, 3, 1, 7)
SSE2_QUARTER_ROUND(3, 2, 0, 9)
SSE2_QUARTER_ROUND(2, 1, 3, 13)
SSE2_QUARTER_ROUND(1, 0, 2, 18)
ASS( pshufd xmm1, xmm1, 0, 3, 2, 1)
ASS( pshufd xmm2, xmm2, 1, 0, 3, 2)
ASS( pshufd xmm3, xmm3, 2, 1, 0, 3)
AS2( sub REG_roundsLeft, 2)
ASJ( jnz, 0, b)
AS2( paddd xmm0, [REG_state + 0*16])
AS2( paddd xmm1, [REG_state + 1*16])
AS2( paddd xmm2, [REG_state + 2*16])
AS2( paddd xmm3, [REG_state + 3*16])
AS2( add dword ptr [REG_state + 8*4], 1)
AS2( adc dword ptr [REG_state + 5*4], 0)
AS2( pcmpeqb xmm6, xmm6) // all ones
AS2( psrlq xmm6, 32) // lo32 mask
ASS( pshufd xmm7, xmm6, 0, 1, 2, 3) // hi32 mask
AS2( movdqa xmm4, xmm0)
AS2( movdqa xmm5, xmm3)
AS2( pand xmm0, xmm7)
AS2( pand xmm4, xmm6)
AS2( pand xmm3, xmm6)
AS2( pand xmm5, xmm7)
AS2( por xmm4, xmm5) // 0,13,2,15
AS2( movdqa xmm5, xmm1)
AS2( pand xmm1, xmm7)
AS2( pand xmm5, xmm6)
AS2( por xmm0, xmm5) // 4,1,6,3
AS2( pand xmm6, xmm2)
AS2( pand xmm2, xmm7)
AS2( por xmm1, xmm6) // 8,5,10,7
AS2( por xmm2, xmm3) // 12,9,14,11
AS2( movdqa xmm5, xmm4)
AS2( movdqa xmm6, xmm0)
AS3( shufpd xmm4, xmm1, 2) // 0,13,10,7
AS3( shufpd xmm0, xmm2, 2) // 4,1,14,11
AS3( shufpd xmm1, xmm5, 2) // 8,5,2,15
AS3( shufpd xmm2, xmm6, 2) // 12,9,6,3
// output keystream
AS_XMM_OUTPUT4(SSE2_Salsa_Output_B, REG_input, REG_output, 4, 0, 1, 2, 3, 0, 1, 2, 3, 4)
ASJ( jmp, 5, b)
ASL(4)
AS_POP_IF86( bp)
#ifdef __GNUC__
AS_POP_IF86( bx)
".att_syntax prefix;"
:
#if CRYPTOPP_BOOL_X64
: "r" (m_rounds), "r" (input), "r" (iterationCount), "r" (m_state.data()), "r" (output), "r" (workspace.m_ptr)
: "%eax", "%edx", "memory", "cc", "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7", "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13", "%xmm14", "%xmm15"
#else
: "d" (m_rounds), "a" (input), "c" (iterationCount), "S" (m_state.data()), "D" (output)
: "memory", "cc"
#endif
);
#endif
#ifdef CRYPTOPP_GENERATE_X64_MASM
movdqa xmm6, [rsp + 0200h]
movdqa xmm7, [rsp + 0210h]
movdqa xmm8, [rsp + 0220h]
movdqa xmm9, [rsp + 0230h]
movdqa xmm10, [rsp + 0240h]
movdqa xmm11, [rsp + 0250h]
movdqa xmm12, [rsp + 0260h]
movdqa xmm13, [rsp + 0270h]
movdqa xmm14, [rsp + 0280h]
movdqa xmm15, [rsp + 0290h]
add rsp, 10*16 + 32*16 + 8
ret
Salsa20_OperateKeystream ENDP
#else
}
else
#endif
#endif
#ifndef CRYPTOPP_GENERATE_X64_MASM
{
word32 x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15;
while (iterationCount--)
{
x0 = m_state[0]; x1 = m_state[1]; x2 = m_state[2]; x3 = m_state[3];
x4 = m_state[4]; x5 = m_state[5]; x6 = m_state[6]; x7 = m_state[7];
x8 = m_state[8]; x9 = m_state[9]; x10 = m_state[10]; x11 = m_state[11];
x12 = m_state[12]; x13 = m_state[13]; x14 = m_state[14]; x15 = m_state[15];
for (int i=m_rounds; i>0; i-=2)
{
#define QUARTER_ROUND(a, b, c, d) \
b = b ^ rotlFixed(a + d, 7); \
c = c ^ rotlFixed(b + a, 9); \
d = d ^ rotlFixed(c + b, 13); \
a = a ^ rotlFixed(d + c, 18);
QUARTER_ROUND(x0, x4, x8, x12)
QUARTER_ROUND(x1, x5, x9, x13)
QUARTER_ROUND(x2, x6, x10, x14)
QUARTER_ROUND(x3, x7, x11, x15)
QUARTER_ROUND(x0, x13, x10, x7)
QUARTER_ROUND(x1, x14, x11, x4)
QUARTER_ROUND(x2, x15, x8, x5)
QUARTER_ROUND(x3, x12, x9, x6)
}
#define SALSA_OUTPUT(x) {\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 0, x0 + m_state[0]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 1, x13 + m_state[13]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 2, x10 + m_state[10]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 3, x7 + m_state[7]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 4, x4 + m_state[4]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 5, x1 + m_state[1]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 6, x14 + m_state[14]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 7, x11 + m_state[11]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 8, x8 + m_state[8]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 9, x5 + m_state[5]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 10, x2 + m_state[2]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 11, x15 + m_state[15]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 12, x12 + m_state[12]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 13, x9 + m_state[9]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 14, x6 + m_state[6]);\
CRYPTOPP_KEYSTREAM_OUTPUT_WORD(x, LITTLE_ENDIAN_ORDER, 15, x3 + m_state[3]);}
#ifndef CRYPTOPP_DOXYGEN_PROCESSING
CRYPTOPP_KEYSTREAM_OUTPUT_SWITCH(SALSA_OUTPUT, BYTES_PER_ITERATION);
#endif
if (++m_state[8] == 0)
++m_state[5];
}
}
} // see comment above if an internal compiler error occurs here
void XSalsa20_Policy::CipherSetKey(const NameValuePairs ¶ms, const byte *key, size_t length)
{
m_rounds = params.GetIntValueWithDefault(Name::Rounds(), 20);
if (!(m_rounds == 8 || m_rounds == 12 || m_rounds == 20))
throw InvalidRounds(XSalsa20::StaticAlgorithmName(), m_rounds);
GetUserKey(LITTLE_ENDIAN_ORDER, m_key.begin(), m_key.size(), key, length);
if (length == 16)
memcpy(m_key.begin()+4, m_key.begin(), 16);
// "expand 32-byte k"
m_state[0] = 0x61707865;
m_state[1] = 0x3320646e;
m_state[2] = 0x79622d32;
m_state[3] = 0x6b206574;
}
void XSalsa20_Policy::CipherResynchronize(byte *keystreamBuffer, const byte *IV, size_t length)
{
assert(length==24);
word32 x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15;
GetBlock<word32, LittleEndian> get(IV);
get(x14)(x11)(x8)(x5)(m_state[14])(m_state[11]);
x13 = m_key[0]; x10 = m_key[1]; x7 = m_key[2]; x4 = m_key[3];
x15 = m_key[4]; x12 = m_key[5]; x9 = m_key[6]; x6 = m_key[7];
x0 = m_state[0]; x1 = m_state[1]; x2 = m_state[2]; x3 = m_state[3];
for (int i=m_rounds; i>0; i-=2)
{
QUARTER_ROUND(x0, x4, x8, x12)
QUARTER_ROUND(x1, x5, x9, x13)
QUARTER_ROUND(x2, x6, x10, x14)
QUARTER_ROUND(x3, x7, x11, x15)
QUARTER_ROUND(x0, x13, x10, x7)
QUARTER_ROUND(x1, x14, x11, x4)
QUARTER_ROUND(x2, x15, x8, x5)
QUARTER_ROUND(x3, x12, x9, x6)
}
m_state[13] = x0; m_state[10] = x1; m_state[7] = x2; m_state[4] = x3;
m_state[15] = x14; m_state[12] = x11; m_state[9] = x8; m_state[6] = x5;
m_state[8] = m_state[5] = 0;
}
NAMESPACE_END
#endif // #ifndef CRYPTOPP_GENERATE_X64_MASM
|
