summaryrefslogtreecommitdiffstats
path: root/arch/x86/crypto/blowfish-x86_64-asm_64.S
blob: 4a43e072d2d1d9f3fe194eac8a42d5fe18b72e6f (plain)
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
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Blowfish Cipher Algorithm (x86_64)
 *
 * Copyright (C) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
 */

#include <linux/linkage.h>
#include <linux/cfi_types.h>

.file "blowfish-x86_64-asm.S"
.text

/* structure of crypto context */
#define p	0
#define s0	((16 + 2) * 4)
#define s1	((16 + 2 + (1 * 256)) * 4)
#define s2	((16 + 2 + (2 * 256)) * 4)
#define s3	((16 + 2 + (3 * 256)) * 4)

/* register macros */
#define CTX %r12
#define RIO %rsi

#define RX0 %rax
#define RX1 %rbx
#define RX2 %rcx
#define RX3 %rdx

#define RX0d %eax
#define RX1d %ebx
#define RX2d %ecx
#define RX3d %edx

#define RX0bl %al
#define RX1bl %bl
#define RX2bl %cl
#define RX3bl %dl

#define RX0bh %ah
#define RX1bh %bh
#define RX2bh %ch
#define RX3bh %dh

#define RT0 %rdi
#define RT1 %rsi
#define RT2 %r8
#define RT3 %r9

#define RT0d %edi
#define RT1d %esi
#define RT2d %r8d
#define RT3d %r9d

#define RKEY %r10

/***********************************************************************
 * 1-way blowfish
 ***********************************************************************/
#define F() \
	rorq $16,		RX0; \
	movzbl RX0bh,		RT0d; \
	movzbl RX0bl,		RT1d; \
	rolq $16,		RX0; \
	movl s0(CTX,RT0,4),	RT0d; \
	addl s1(CTX,RT1,4),	RT0d; \
	movzbl RX0bh,		RT1d; \
	movzbl RX0bl,		RT2d; \
	rolq $32,		RX0; \
	xorl s2(CTX,RT1,4),	RT0d; \
	addl s3(CTX,RT2,4),	RT0d; \
	xorq RT0,		RX0;

#define add_roundkey_enc(n) \
	xorq p+4*(n)(CTX), 	RX0;

#define round_enc(n) \
	add_roundkey_enc(n); \
	\
	F(); \
	F();

#define add_roundkey_dec(n) \
	movq p+4*(n-1)(CTX),	RT0; \
	rorq $32,		RT0; \
	xorq RT0,		RX0;

#define round_dec(n) \
	add_roundkey_dec(n); \
	\
	F(); \
	F(); \

#define read_block() \
	movq (RIO), 		RX0; \
	rorq $32, 		RX0; \
	bswapq 			RX0;

#define write_block() \
	bswapq 			RX0; \
	movq RX0, 		(RIO);

#define xor_block() \
	bswapq 			RX0; \
	xorq RX0, 		(RIO);

SYM_FUNC_START(__blowfish_enc_blk)
	/* input:
	 *	%rdi: ctx
	 *	%rsi: dst
	 *	%rdx: src
	 *	%rcx: bool, if true: xor output
	 */
	movq %r12, %r11;

	movq %rdi, CTX;
	movq %rsi, %r10;
	movq %rdx, RIO;

	read_block();

	round_enc(0);
	round_enc(2);
	round_enc(4);
	round_enc(6);
	round_enc(8);
	round_enc(10);
	round_enc(12);
	round_enc(14);
	add_roundkey_enc(16);

	movq %r11, %r12;

	movq %r10, RIO;
	test %cl, %cl;
	jnz .L__enc_xor;

	write_block();
	RET;
.L__enc_xor:
	xor_block();
	RET;
SYM_FUNC_END(__blowfish_enc_blk)

SYM_TYPED_FUNC_START(blowfish_dec_blk)
	/* input:
	 *	%rdi: ctx
	 *	%rsi: dst
	 *	%rdx: src
	 */
	movq %r12, %r11;

	movq %rdi, CTX;
	movq %rsi, %r10;
	movq %rdx, RIO;

	read_block();

	round_dec(17);
	round_dec(15);
	round_dec(13);
	round_dec(11);
	round_dec(9);
	round_dec(7);
	round_dec(5);
	round_dec(3);
	add_roundkey_dec(1);

	movq %r10, RIO;
	write_block();

	movq %r11, %r12;

	RET;
SYM_FUNC_END(blowfish_dec_blk)

/**********************************************************************
  4-way blowfish, four blocks parallel
 **********************************************************************/

/* F() for 4-way. Slower when used alone/1-way, but faster when used
 * parallel/4-way (tested on AMD Phenom II & Intel Xeon E7330).
 */
#define F4(x) \
	movzbl x ## bh,		RT1d; \
	movzbl x ## bl,		RT3d; \
	rorq $16,		x; \
	movzbl x ## bh,		RT0d; \
	movzbl x ## bl,		RT2d; \
	rorq $16,		x; \
	movl s0(CTX,RT0,4),	RT0d; \
	addl s1(CTX,RT2,4),	RT0d; \
	xorl s2(CTX,RT1,4),	RT0d; \
	addl s3(CTX,RT3,4),	RT0d; \
	xorq RT0,		x;

#define add_preloaded_roundkey4() \
	xorq RKEY,		RX0; \
	xorq RKEY,		RX1; \
	xorq RKEY,		RX2; \
	xorq RKEY,		RX3;

#define preload_roundkey_enc(n) \
	movq p+4*(n)(CTX),	RKEY;

#define add_roundkey_enc4(n) \
	add_preloaded_roundkey4(); \
	preload_roundkey_enc(n + 2);

#define round_enc4(n) \
	add_roundkey_enc4(n); \
	\
	F4(RX0); \
	F4(RX1); \
	F4(RX2); \
	F4(RX3); \
	\
	F4(RX0); \
	F4(RX1); \
	F4(RX2); \
	F4(RX3);

#define preload_roundkey_dec(n) \
	movq p+4*((n)-1)(CTX),	RKEY; \
	rorq $32,		RKEY;

#define add_roundkey_dec4(n) \
	add_preloaded_roundkey4(); \
	preload_roundkey_dec(n - 2);

#define round_dec4(n) \
	add_roundkey_dec4(n); \
	\
	F4(RX0); \
	F4(RX1); \
	F4(RX2); \
	F4(RX3); \
	\
	F4(RX0); \
	F4(RX1); \
	F4(RX2); \
	F4(RX3);

#define read_block4() \
	movq (RIO),		RX0; \
	rorq $32,		RX0; \
	bswapq 			RX0; \
	\
	movq 8(RIO),		RX1; \
	rorq $32,		RX1; \
	bswapq 			RX1; \
	\
	movq 16(RIO),		RX2; \
	rorq $32,		RX2; \
	bswapq 			RX2; \
	\
	movq 24(RIO),		RX3; \
	rorq $32,		RX3; \
	bswapq 			RX3;

#define write_block4() \
	bswapq 			RX0; \
	movq RX0,		(RIO); \
	\
	bswapq 			RX1; \
	movq RX1,		8(RIO); \
	\
	bswapq 			RX2; \
	movq RX2,		16(RIO); \
	\
	bswapq 			RX3; \
	movq RX3,		24(RIO);

#define xor_block4() \
	bswapq 			RX0; \
	xorq RX0,		(RIO); \
	\
	bswapq 			RX1; \
	xorq RX1,		8(RIO); \
	\
	bswapq 			RX2; \
	xorq RX2,		16(RIO); \
	\
	bswapq 			RX3; \
	xorq RX3,		24(RIO);

SYM_FUNC_START(__blowfish_enc_blk_4way)
	/* input:
	 *	%rdi: ctx
	 *	%rsi: dst
	 *	%rdx: src
	 *	%rcx: bool, if true: xor output
	 */
	pushq %r12;
	pushq %rbx;
	pushq %rcx;

	movq %rdi, CTX
	movq %rsi, %r11;
	movq %rdx, RIO;

	preload_roundkey_enc(0);

	read_block4();

	round_enc4(0);
	round_enc4(2);
	round_enc4(4);
	round_enc4(6);
	round_enc4(8);
	round_enc4(10);
	round_enc4(12);
	round_enc4(14);
	add_preloaded_roundkey4();

	popq %r12;
	movq %r11, RIO;

	test %r12b, %r12b;
	jnz .L__enc_xor4;

	write_block4();

	popq %rbx;
	popq %r12;
	RET;

.L__enc_xor4:
	xor_block4();

	popq %rbx;
	popq %r12;
	RET;
SYM_FUNC_END(__blowfish_enc_blk_4way)

SYM_TYPED_FUNC_START(blowfish_dec_blk_4way)
	/* input:
	 *	%rdi: ctx
	 *	%rsi: dst
	 *	%rdx: src
	 */
	pushq %r12;
	pushq %rbx;

	movq %rdi, CTX;
	movq %rsi, %r11
	movq %rdx, RIO;

	preload_roundkey_dec(17);
	read_block4();

	round_dec4(17);
	round_dec4(15);
	round_dec4(13);
	round_dec4(11);
	round_dec4(9);
	round_dec4(7);
	round_dec4(5);
	round_dec4(3);
	add_preloaded_roundkey4();

	movq %r11, RIO;
	write_block4();

	popq %rbx;
	popq %r12;

	RET;
SYM_FUNC_END(blowfish_dec_blk_4way)