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/*
* linux/arch/arm64/crypto/aes-neon.S - AES cipher for ARMv8 NEON
*
* Copyright (C) 2013 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>
#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
add \out, \in, \in
and \temp, \temp, \const
eor \out, \out, \temp
.endm
/* preload the entire Sbox */
.macro prepare, sbox, shiftrows, temp
adr \temp, \sbox
movi v12.16b, #0x40
ldr q13, \shiftrows
movi v14.16b, #0x1b
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, v12.16b
tbl \in\().16b, {v16.16b-v19.16b}, \in\().16b
sub v10.16b, v9.16b, v12.16b
tbx \in\().16b, {v20.16b-v23.16b}, v9.16b
sub v11.16b, v10.16b, v12.16b
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
mul_by_x v10.16b, \in\().16b, v9.16b, v14.16b
rev32 v8.8h, \in\().8h
eor \in\().16b, v10.16b, \in\().16b
shl v9.4s, v8.4s, #24
shl v11.4s, \in\().4s, #24
sri v9.4s, v8.4s, #8
sri v11.4s, \in\().4s, #8
eor v9.16b, v9.16b, v8.16b
eor v10.16b, v10.16b, v9.16b
eor \in\().16b, v10.16b, v11.16b
.endm
/* Inverse MixColumns: pre-multiply by { 5, 0, 4, 0 } */
.macro inv_mix_columns, in
mul_by_x v11.16b, \in\().16b, v10.16b, v14.16b
mul_by_x v11.16b, v11.16b, v10.16b, v14.16b
eor \in\().16b, \in\().16b, v11.16b
rev32 v11.8h, v11.8h
eor \in\().16b, \in\().16b, v11.16b
mix_columns \in
.endm
.macro do_block, enc, in, rounds, rk, rkp, i
ld1 {v15.16b}, [\rk]
add \rkp, \rk, #16
mov \i, \rounds
1111: eor \in\().16b, \in\().16b, v15.16b /* ^round key */
tbl \in\().16b, {\in\().16b}, v13.16b /* ShiftRows */
sub_bytes \in
ld1 {v15.16b}, [\rkp], #16
subs \i, \i, #1
beq 2222f
.if \enc == 1
mix_columns \in
.else
inv_mix_columns \in
.endif
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, v12.16b
sub v9.16b, \in1\().16b, v12.16b
tbl \in0\().16b, {v16.16b-v19.16b}, \in0\().16b
tbl \in1\().16b, {v16.16b-v19.16b}, \in1\().16b
sub v10.16b, v8.16b, v12.16b
sub v11.16b, v9.16b, v12.16b
tbx \in0\().16b, {v20.16b-v23.16b}, v8.16b
tbx \in1\().16b, {v20.16b-v23.16b}, v9.16b
sub v8.16b, v10.16b, v12.16b
sub v9.16b, v11.16b, v12.16b
tbx \in0\().16b, {v24.16b-v27.16b}, v10.16b
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, v12.16b
tbl \in0\().16b, {v16.16b-v19.16b}, \in0\().16b
sub v9.16b, \in1\().16b, v12.16b
tbl \in1\().16b, {v16.16b-v19.16b}, \in1\().16b
sub v10.16b, \in2\().16b, v12.16b
tbl \in2\().16b, {v16.16b-v19.16b}, \in2\().16b
sub v11.16b, \in3\().16b, v12.16b
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, v12.16b
tbx \in2\().16b, {v20.16b-v23.16b}, v10.16b
sub v9.16b, v9.16b, v12.16b
tbx \in3\().16b, {v20.16b-v23.16b}, v11.16b
sub v10.16b, v10.16b, v12.16b
tbx \in0\().16b, {v24.16b-v27.16b}, v8.16b
sub v11.16b, v11.16b, v12.16b
tbx \in1\().16b, {v24.16b-v27.16b}, v9.16b
sub v8.16b, v8.16b, v12.16b
tbx \in2\().16b, {v24.16b-v27.16b}, v10.16b
sub v9.16b, v9.16b, v12.16b
tbx \in3\().16b, {v24.16b-v27.16b}, v11.16b
sub v10.16b, v10.16b, v12.16b
tbx \in0\().16b, {v28.16b-v31.16b}, v8.16b
sub v11.16b, v11.16b, v12.16b
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
add \out0\().16b, \in0\().16b, \in0\().16b
sshr \tmp1\().16b, \in1\().16b, #7
and \tmp0\().16b, \tmp0\().16b, \const\().16b
add \out1\().16b, \in1\().16b, \in1\().16b
and \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
mul_by_x_2x v8, v9, \in0, \in1, v10, v11, v14
rev32 v10.8h, \in0\().8h
rev32 v11.8h, \in1\().8h
eor \in0\().16b, v8.16b, \in0\().16b
eor \in1\().16b, v9.16b, \in1\().16b
shl v12.4s, v10.4s, #24
shl v13.4s, v11.4s, #24
eor v8.16b, v8.16b, v10.16b
sri v12.4s, v10.4s, #8
shl v10.4s, \in0\().4s, #24
eor v9.16b, v9.16b, v11.16b
sri v13.4s, v11.4s, #8
shl v11.4s, \in1\().4s, #24
sri v10.4s, \in0\().4s, #8
eor \in0\().16b, v8.16b, v12.16b
sri v11.4s, \in1\().4s, #8
eor \in1\().16b, v9.16b, v13.16b
eor \in0\().16b, v10.16b, \in0\().16b
eor \in1\().16b, v11.16b, \in1\().16b
.endm
.macro inv_mix_cols_2x, in0, in1
mul_by_x_2x v8, v9, \in0, \in1, v10, v11, v14
mul_by_x_2x v8, v9, v8, v9, v10, v11, v14
eor \in0\().16b, \in0\().16b, v8.16b
eor \in1\().16b, \in1\().16b, v9.16b
rev32 v8.8h, v8.8h
rev32 v9.8h, v9.8h
eor \in0\().16b, \in0\().16b, v8.16b
eor \in1\().16b, \in1\().16b, v9.16b
mix_columns_2x \in0, \in1
.endm
.macro inv_mix_cols_4x, in0, in1, in2, in3
mul_by_x_2x v8, v9, \in0, \in1, v10, v11, v14
mul_by_x_2x v10, v11, \in2, \in3, v12, v13, v14
mul_by_x_2x v8, v9, v8, v9, v12, v13, v14
mul_by_x_2x v10, v11, v10, v11, v12, v13, v14
eor \in0\().16b, \in0\().16b, v8.16b
eor \in1\().16b, \in1\().16b, v9.16b
eor \in2\().16b, \in2\().16b, v10.16b
eor \in3\().16b, \in3\().16b, v11.16b
rev32 v8.8h, v8.8h
rev32 v9.8h, v9.8h
rev32 v10.8h, v10.8h
rev32 v11.8h, v11.8h
eor \in0\().16b, \in0\().16b, v8.16b
eor \in1\().16b, \in1\().16b, v9.16b
eor \in2\().16b, \in2\().16b, v10.16b
eor \in3\().16b, \in3\().16b, v11.16b
mix_columns_2x \in0, \in1
mix_columns_2x \in2, \in3
.endm
.macro do_block_2x, enc, in0, in1 rounds, rk, rkp, i
ld1 {v15.16b}, [\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 */
sub_bytes_2x \in0, \in1
tbl \in0\().16b, {\in0\().16b}, v13.16b /* ShiftRows */
tbl \in1\().16b, {\in1\().16b}, v13.16b /* ShiftRows */
ld1 {v15.16b}, [\rkp], #16
subs \i, \i, #1
beq 2222f
.if \enc == 1
mix_columns_2x \in0, \in1
ldr q13, .LForward_ShiftRows
.else
inv_mix_cols_2x \in0, \in1
ldr q13, .LReverse_ShiftRows
.endif
movi v12.16b, #0x40
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 {v15.16b}, [\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 */
sub_bytes_4x \in0, \in1, \in2, \in3
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 */
ld1 {v15.16b}, [\rkp], #16
subs \i, \i, #1
beq 2222f
.if \enc == 1
mix_columns_2x \in0, \in1
mix_columns_2x \in2, \in3
ldr q13, .LForward_ShiftRows
.else
inv_mix_cols_4x \in0, \in1, \in2, \in3
ldr q13, .LReverse_ShiftRows
.endif
movi v12.16b, #0x40
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"
.text
.align 4
.LForward_ShiftRows:
.byte 0x0, 0x5, 0xa, 0xf, 0x4, 0x9, 0xe, 0x3
.byte 0x8, 0xd, 0x2, 0x7, 0xc, 0x1, 0x6, 0xb
.LReverse_ShiftRows:
.byte 0x0, 0xd, 0xa, 0x7, 0x4, 0x1, 0xe, 0xb
.byte 0x8, 0x5, 0x2, 0xf, 0xc, 0x9, 0x6, 0x3
.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
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