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
| /*
| * linux/arch/arm64/crypto/aes-neon.S - AES cipher for ARMv8 NEON
| *
| * Copyright (C) 2013 - 2017 Linaro Ltd. <ard.biesheuvel@linaro.org>
| *
| * This program is free software; you can redistribute it and/or modify
| * it under the terms of the GNU General Public License version 2 as
| * published by the Free Software Foundation.
| */
|
| #include <linux/linkage.h>
| #include <asm/assembler.h>
|
| #define AES_ENTRY(func) ENTRY(neon_ ## func)
| #define AES_ENDPROC(func) ENDPROC(neon_ ## func)
|
| /* multiply by polynomial 'x' in GF(2^8) */
| .macro mul_by_x, out, in, temp, const
| sshr \temp, \in, #7
| shl \out, \in, #1
| and \temp, \temp, \const
| eor \out, \out, \temp
| .endm
|
| /* multiply by polynomial 'x^2' in GF(2^8) */
| .macro mul_by_x2, out, in, temp, const
| ushr \temp, \in, #6
| shl \out, \in, #2
| pmul \temp, \temp, \const
| eor \out, \out, \temp
| .endm
|
| /* preload the entire Sbox */
| .macro prepare, sbox, shiftrows, temp
| movi v12.16b, #0x1b
| ldr_l q13, \shiftrows, \temp
| ldr_l q14, .Lror32by8, \temp
| adr_l \temp, \sbox
| ld1 {v16.16b-v19.16b}, [\temp], #64
| ld1 {v20.16b-v23.16b}, [\temp], #64
| ld1 {v24.16b-v27.16b}, [\temp], #64
| ld1 {v28.16b-v31.16b}, [\temp]
| .endm
|
| /* do preload for encryption */
| .macro enc_prepare, ignore0, ignore1, temp
| prepare .LForward_Sbox, .LForward_ShiftRows, \temp
| .endm
|
| .macro enc_switch_key, ignore0, ignore1, temp
| /* do nothing */
| .endm
|
| /* do preload for decryption */
| .macro dec_prepare, ignore0, ignore1, temp
| prepare .LReverse_Sbox, .LReverse_ShiftRows, \temp
| .endm
|
| /* apply SubBytes transformation using the the preloaded Sbox */
| .macro sub_bytes, in
| sub v9.16b, \in\().16b, v15.16b
| tbl \in\().16b, {v16.16b-v19.16b}, \in\().16b
| sub v10.16b, v9.16b, v15.16b
| tbx \in\().16b, {v20.16b-v23.16b}, v9.16b
| sub v11.16b, v10.16b, v15.16b
| tbx \in\().16b, {v24.16b-v27.16b}, v10.16b
| tbx \in\().16b, {v28.16b-v31.16b}, v11.16b
| .endm
|
| /* apply MixColumns transformation */
| .macro mix_columns, in, enc
| .if \enc == 0
| /* Inverse MixColumns: pre-multiply by { 5, 0, 4, 0 } */
| mul_by_x2 v8.16b, \in\().16b, v9.16b, v12.16b
| eor \in\().16b, \in\().16b, v8.16b
| rev32 v8.8h, v8.8h
| eor \in\().16b, \in\().16b, v8.16b
| .endif
|
| mul_by_x v9.16b, \in\().16b, v8.16b, v12.16b
| rev32 v8.8h, \in\().8h
| eor v8.16b, v8.16b, v9.16b
| eor \in\().16b, \in\().16b, v8.16b
| tbl \in\().16b, {\in\().16b}, v14.16b
| eor \in\().16b, \in\().16b, v8.16b
| .endm
|
| .macro do_block, enc, in, rounds, rk, rkp, i
| ld1 {v15.4s}, [\rk]
| add \rkp, \rk, #16
| mov \i, \rounds
| 1111: eor \in\().16b, \in\().16b, v15.16b /* ^round key */
| movi v15.16b, #0x40
| tbl \in\().16b, {\in\().16b}, v13.16b /* ShiftRows */
| sub_bytes \in
| subs \i, \i, #1
| ld1 {v15.4s}, [\rkp], #16
| beq 2222f
| mix_columns \in, \enc
| b 1111b
| 2222: eor \in\().16b, \in\().16b, v15.16b /* ^round key */
| .endm
|
| .macro encrypt_block, in, rounds, rk, rkp, i
| do_block 1, \in, \rounds, \rk, \rkp, \i
| .endm
|
| .macro decrypt_block, in, rounds, rk, rkp, i
| do_block 0, \in, \rounds, \rk, \rkp, \i
| .endm
|
| /*
| * Interleaved versions: functionally equivalent to the
| * ones above, but applied to 2 or 4 AES states in parallel.
| */
|
| .macro sub_bytes_2x, in0, in1
| sub v8.16b, \in0\().16b, v15.16b
| tbl \in0\().16b, {v16.16b-v19.16b}, \in0\().16b
| sub v9.16b, \in1\().16b, v15.16b
| tbl \in1\().16b, {v16.16b-v19.16b}, \in1\().16b
| sub v10.16b, v8.16b, v15.16b
| tbx \in0\().16b, {v20.16b-v23.16b}, v8.16b
| sub v11.16b, v9.16b, v15.16b
| tbx \in1\().16b, {v20.16b-v23.16b}, v9.16b
| sub v8.16b, v10.16b, v15.16b
| tbx \in0\().16b, {v24.16b-v27.16b}, v10.16b
| sub v9.16b, v11.16b, v15.16b
| tbx \in1\().16b, {v24.16b-v27.16b}, v11.16b
| tbx \in0\().16b, {v28.16b-v31.16b}, v8.16b
| tbx \in1\().16b, {v28.16b-v31.16b}, v9.16b
| .endm
|
| .macro sub_bytes_4x, in0, in1, in2, in3
| sub v8.16b, \in0\().16b, v15.16b
| tbl \in0\().16b, {v16.16b-v19.16b}, \in0\().16b
| sub v9.16b, \in1\().16b, v15.16b
| tbl \in1\().16b, {v16.16b-v19.16b}, \in1\().16b
| sub v10.16b, \in2\().16b, v15.16b
| tbl \in2\().16b, {v16.16b-v19.16b}, \in2\().16b
| sub v11.16b, \in3\().16b, v15.16b
| tbl \in3\().16b, {v16.16b-v19.16b}, \in3\().16b
| tbx \in0\().16b, {v20.16b-v23.16b}, v8.16b
| tbx \in1\().16b, {v20.16b-v23.16b}, v9.16b
| sub v8.16b, v8.16b, v15.16b
| tbx \in2\().16b, {v20.16b-v23.16b}, v10.16b
| sub v9.16b, v9.16b, v15.16b
| tbx \in3\().16b, {v20.16b-v23.16b}, v11.16b
| sub v10.16b, v10.16b, v15.16b
| tbx \in0\().16b, {v24.16b-v27.16b}, v8.16b
| sub v11.16b, v11.16b, v15.16b
| tbx \in1\().16b, {v24.16b-v27.16b}, v9.16b
| sub v8.16b, v8.16b, v15.16b
| tbx \in2\().16b, {v24.16b-v27.16b}, v10.16b
| sub v9.16b, v9.16b, v15.16b
| tbx \in3\().16b, {v24.16b-v27.16b}, v11.16b
| sub v10.16b, v10.16b, v15.16b
| tbx \in0\().16b, {v28.16b-v31.16b}, v8.16b
| sub v11.16b, v11.16b, v15.16b
| tbx \in1\().16b, {v28.16b-v31.16b}, v9.16b
| tbx \in2\().16b, {v28.16b-v31.16b}, v10.16b
| tbx \in3\().16b, {v28.16b-v31.16b}, v11.16b
| .endm
|
| .macro mul_by_x_2x, out0, out1, in0, in1, tmp0, tmp1, const
| sshr \tmp0\().16b, \in0\().16b, #7
| shl \out0\().16b, \in0\().16b, #1
| sshr \tmp1\().16b, \in1\().16b, #7
| and \tmp0\().16b, \tmp0\().16b, \const\().16b
| shl \out1\().16b, \in1\().16b, #1
| and \tmp1\().16b, \tmp1\().16b, \const\().16b
| eor \out0\().16b, \out0\().16b, \tmp0\().16b
| eor \out1\().16b, \out1\().16b, \tmp1\().16b
| .endm
|
| .macro mul_by_x2_2x, out0, out1, in0, in1, tmp0, tmp1, const
| ushr \tmp0\().16b, \in0\().16b, #6
| shl \out0\().16b, \in0\().16b, #2
| ushr \tmp1\().16b, \in1\().16b, #6
| pmul \tmp0\().16b, \tmp0\().16b, \const\().16b
| shl \out1\().16b, \in1\().16b, #2
| pmul \tmp1\().16b, \tmp1\().16b, \const\().16b
| eor \out0\().16b, \out0\().16b, \tmp0\().16b
| eor \out1\().16b, \out1\().16b, \tmp1\().16b
| .endm
|
| .macro mix_columns_2x, in0, in1, enc
| .if \enc == 0
| /* Inverse MixColumns: pre-multiply by { 5, 0, 4, 0 } */
| mul_by_x2_2x v8, v9, \in0, \in1, v10, v11, v12
| eor \in0\().16b, \in0\().16b, v8.16b
| rev32 v8.8h, v8.8h
| eor \in1\().16b, \in1\().16b, v9.16b
| rev32 v9.8h, v9.8h
| eor \in0\().16b, \in0\().16b, v8.16b
| eor \in1\().16b, \in1\().16b, v9.16b
| .endif
|
| mul_by_x_2x v8, v9, \in0, \in1, v10, v11, v12
| rev32 v10.8h, \in0\().8h
| rev32 v11.8h, \in1\().8h
| eor v10.16b, v10.16b, v8.16b
| eor v11.16b, v11.16b, v9.16b
| eor \in0\().16b, \in0\().16b, v10.16b
| eor \in1\().16b, \in1\().16b, v11.16b
| tbl \in0\().16b, {\in0\().16b}, v14.16b
| tbl \in1\().16b, {\in1\().16b}, v14.16b
| eor \in0\().16b, \in0\().16b, v10.16b
| eor \in1\().16b, \in1\().16b, v11.16b
| .endm
|
| .macro do_block_2x, enc, in0, in1, rounds, rk, rkp, i
| ld1 {v15.4s}, [\rk]
| add \rkp, \rk, #16
| mov \i, \rounds
| 1111: eor \in0\().16b, \in0\().16b, v15.16b /* ^round key */
| eor \in1\().16b, \in1\().16b, v15.16b /* ^round key */
| movi v15.16b, #0x40
| tbl \in0\().16b, {\in0\().16b}, v13.16b /* ShiftRows */
| tbl \in1\().16b, {\in1\().16b}, v13.16b /* ShiftRows */
| sub_bytes_2x \in0, \in1
| subs \i, \i, #1
| ld1 {v15.4s}, [\rkp], #16
| beq 2222f
| mix_columns_2x \in0, \in1, \enc
| b 1111b
| 2222: eor \in0\().16b, \in0\().16b, v15.16b /* ^round key */
| eor \in1\().16b, \in1\().16b, v15.16b /* ^round key */
| .endm
|
| .macro do_block_4x, enc, in0, in1, in2, in3, rounds, rk, rkp, i
| ld1 {v15.4s}, [\rk]
| add \rkp, \rk, #16
| mov \i, \rounds
| 1111: eor \in0\().16b, \in0\().16b, v15.16b /* ^round key */
| eor \in1\().16b, \in1\().16b, v15.16b /* ^round key */
| eor \in2\().16b, \in2\().16b, v15.16b /* ^round key */
| eor \in3\().16b, \in3\().16b, v15.16b /* ^round key */
| movi v15.16b, #0x40
| tbl \in0\().16b, {\in0\().16b}, v13.16b /* ShiftRows */
| tbl \in1\().16b, {\in1\().16b}, v13.16b /* ShiftRows */
| tbl \in2\().16b, {\in2\().16b}, v13.16b /* ShiftRows */
| tbl \in3\().16b, {\in3\().16b}, v13.16b /* ShiftRows */
| sub_bytes_4x \in0, \in1, \in2, \in3
| subs \i, \i, #1
| ld1 {v15.4s}, [\rkp], #16
| beq 2222f
| mix_columns_2x \in0, \in1, \enc
| mix_columns_2x \in2, \in3, \enc
| b 1111b
| 2222: eor \in0\().16b, \in0\().16b, v15.16b /* ^round key */
| eor \in1\().16b, \in1\().16b, v15.16b /* ^round key */
| eor \in2\().16b, \in2\().16b, v15.16b /* ^round key */
| eor \in3\().16b, \in3\().16b, v15.16b /* ^round key */
| .endm
|
| .macro encrypt_block2x, in0, in1, rounds, rk, rkp, i
| do_block_2x 1, \in0, \in1, \rounds, \rk, \rkp, \i
| .endm
|
| .macro decrypt_block2x, in0, in1, rounds, rk, rkp, i
| do_block_2x 0, \in0, \in1, \rounds, \rk, \rkp, \i
| .endm
|
| .macro encrypt_block4x, in0, in1, in2, in3, rounds, rk, rkp, i
| do_block_4x 1, \in0, \in1, \in2, \in3, \rounds, \rk, \rkp, \i
| .endm
|
| .macro decrypt_block4x, in0, in1, in2, in3, rounds, rk, rkp, i
| do_block_4x 0, \in0, \in1, \in2, \in3, \rounds, \rk, \rkp, \i
| .endm
|
| #include "aes-modes.S"
|
| .section ".rodata", "a"
| .align 6
| .LForward_Sbox:
| .byte 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5
| .byte 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76
| .byte 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0
| .byte 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0
| .byte 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc
| .byte 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15
| .byte 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a
| .byte 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75
| .byte 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0
| .byte 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84
| .byte 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b
| .byte 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf
| .byte 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85
| .byte 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8
| .byte 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5
| .byte 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2
| .byte 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17
| .byte 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73
| .byte 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88
| .byte 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb
| .byte 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c
| .byte 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79
| .byte 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9
| .byte 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08
| .byte 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6
| .byte 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a
| .byte 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e
| .byte 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e
| .byte 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94
| .byte 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf
| .byte 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68
| .byte 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
|
| .LReverse_Sbox:
| .byte 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38
| .byte 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb
| .byte 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87
| .byte 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb
| .byte 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d
| .byte 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e
| .byte 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2
| .byte 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25
| .byte 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16
| .byte 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92
| .byte 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda
| .byte 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84
| .byte 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a
| .byte 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06
| .byte 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02
| .byte 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b
| .byte 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea
| .byte 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73
| .byte 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85
| .byte 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e
| .byte 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89
| .byte 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b
| .byte 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20
| .byte 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4
| .byte 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31
| .byte 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f
| .byte 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d
| .byte 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef
| .byte 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0
| .byte 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61
| .byte 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26
| .byte 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
|
| .LForward_ShiftRows:
| .octa 0x0b06010c07020d08030e09040f0a0500
|
| .LReverse_ShiftRows:
| .octa 0x0306090c0f0205080b0e0104070a0d00
|
| .Lror32by8:
| .octa 0x0c0f0e0d080b0a090407060500030201
|
|
