mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-24 12:44:11 +08:00
1b069597c2
Delete the redundant word 'the'. Signed-off-by: Jilin Yuan <yuanjilin@cdjrlc.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
251 lines
7.4 KiB
ArmAsm
251 lines
7.4 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* linux/arch/arm64/crypto/aes-neon.S - AES cipher for ARMv8 NEON
|
|
*
|
|
* Copyright (C) 2013 - 2017 Linaro Ltd. <ard.biesheuvel@linaro.org>
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
#include <asm/assembler.h>
|
|
|
|
#define AES_FUNC_START(func) SYM_FUNC_START(neon_ ## func)
|
|
#define AES_FUNC_END(func) SYM_FUNC_END(neon_ ## func)
|
|
|
|
xtsmask .req v7
|
|
cbciv .req v7
|
|
vctr .req v4
|
|
|
|
.macro xts_reload_mask, tmp
|
|
xts_load_mask \tmp
|
|
.endm
|
|
|
|
/* special case for the neon-bs driver calling into this one for CTS */
|
|
.macro xts_cts_skip_tw, reg, lbl
|
|
tbnz \reg, #1, \lbl
|
|
.endm
|
|
|
|
/* 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 crypto_aes_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 crypto_aes_inv_sbox, .LReverse_ShiftRows, \temp
|
|
.endm
|
|
|
|
/* apply SubBytes transformation using 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 AES states in parallel.
|
|
*/
|
|
|
|
.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_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_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 4
|
|
.LForward_ShiftRows:
|
|
.octa 0x0b06010c07020d08030e09040f0a0500
|
|
|
|
.LReverse_ShiftRows:
|
|
.octa 0x0306090c0f0205080b0e0104070a0d00
|
|
|
|
.Lror32by8:
|
|
.octa 0x0c0f0e0d080b0a090407060500030201
|