131 lines
3.3 KiB
ArmAsm
131 lines
3.3 KiB
ArmAsm
/*
|
|
* linux/arch/arm64/crypto/aes-ce.S - AES cipher for ARMv8 with
|
|
* Crypto Extensions
|
|
*
|
|
* 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>
|
|
#include <asm/assembler.h>
|
|
|
|
#define AES_ENTRY(func) ENTRY(ce_ ## func)
|
|
#define AES_ENDPROC(func) ENDPROC(ce_ ## func)
|
|
|
|
.arch armv8-a+crypto
|
|
|
|
/* preload all round keys */
|
|
.macro load_round_keys, rounds, rk
|
|
cmp \rounds, #12
|
|
blo 2222f /* 128 bits */
|
|
beq 1111f /* 192 bits */
|
|
ld1 {v17.16b-v18.16b}, [\rk], #32
|
|
1111: ld1 {v19.16b-v20.16b}, [\rk], #32
|
|
2222: ld1 {v21.16b-v24.16b}, [\rk], #64
|
|
ld1 {v25.16b-v28.16b}, [\rk], #64
|
|
ld1 {v29.16b-v31.16b}, [\rk]
|
|
.endm
|
|
|
|
/* prepare for encryption with key in rk[] */
|
|
.macro enc_prepare, rounds, rk, ignore
|
|
load_round_keys \rounds, \rk
|
|
.endm
|
|
|
|
/* prepare for encryption (again) but with new key in rk[] */
|
|
.macro enc_switch_key, rounds, rk, ignore
|
|
load_round_keys \rounds, \rk
|
|
.endm
|
|
|
|
/* prepare for decryption with key in rk[] */
|
|
.macro dec_prepare, rounds, rk, ignore
|
|
load_round_keys \rounds, \rk
|
|
.endm
|
|
|
|
.macro do_enc_Nx, de, mc, k, i0, i1, i2, i3
|
|
aes\de \i0\().16b, \k\().16b
|
|
aes\mc \i0\().16b, \i0\().16b
|
|
.ifnb \i1
|
|
aes\de \i1\().16b, \k\().16b
|
|
aes\mc \i1\().16b, \i1\().16b
|
|
.ifnb \i3
|
|
aes\de \i2\().16b, \k\().16b
|
|
aes\mc \i2\().16b, \i2\().16b
|
|
aes\de \i3\().16b, \k\().16b
|
|
aes\mc \i3\().16b, \i3\().16b
|
|
.endif
|
|
.endif
|
|
.endm
|
|
|
|
/* up to 4 interleaved encryption rounds with the same round key */
|
|
.macro round_Nx, enc, k, i0, i1, i2, i3
|
|
.ifc \enc, e
|
|
do_enc_Nx e, mc, \k, \i0, \i1, \i2, \i3
|
|
.else
|
|
do_enc_Nx d, imc, \k, \i0, \i1, \i2, \i3
|
|
.endif
|
|
.endm
|
|
|
|
/* up to 4 interleaved final rounds */
|
|
.macro fin_round_Nx, de, k, k2, i0, i1, i2, i3
|
|
aes\de \i0\().16b, \k\().16b
|
|
.ifnb \i1
|
|
aes\de \i1\().16b, \k\().16b
|
|
.ifnb \i3
|
|
aes\de \i2\().16b, \k\().16b
|
|
aes\de \i3\().16b, \k\().16b
|
|
.endif
|
|
.endif
|
|
eor \i0\().16b, \i0\().16b, \k2\().16b
|
|
.ifnb \i1
|
|
eor \i1\().16b, \i1\().16b, \k2\().16b
|
|
.ifnb \i3
|
|
eor \i2\().16b, \i2\().16b, \k2\().16b
|
|
eor \i3\().16b, \i3\().16b, \k2\().16b
|
|
.endif
|
|
.endif
|
|
.endm
|
|
|
|
/* up to 4 interleaved blocks */
|
|
.macro do_block_Nx, enc, rounds, i0, i1, i2, i3
|
|
cmp \rounds, #12
|
|
blo 2222f /* 128 bits */
|
|
beq 1111f /* 192 bits */
|
|
round_Nx \enc, v17, \i0, \i1, \i2, \i3
|
|
round_Nx \enc, v18, \i0, \i1, \i2, \i3
|
|
1111: round_Nx \enc, v19, \i0, \i1, \i2, \i3
|
|
round_Nx \enc, v20, \i0, \i1, \i2, \i3
|
|
2222: .irp key, v21, v22, v23, v24, v25, v26, v27, v28, v29
|
|
round_Nx \enc, \key, \i0, \i1, \i2, \i3
|
|
.endr
|
|
fin_round_Nx \enc, v30, v31, \i0, \i1, \i2, \i3
|
|
.endm
|
|
|
|
.macro encrypt_block, in, rounds, t0, t1, t2
|
|
do_block_Nx e, \rounds, \in
|
|
.endm
|
|
|
|
.macro encrypt_block2x, i0, i1, rounds, t0, t1, t2
|
|
do_block_Nx e, \rounds, \i0, \i1
|
|
.endm
|
|
|
|
.macro encrypt_block4x, i0, i1, i2, i3, rounds, t0, t1, t2
|
|
do_block_Nx e, \rounds, \i0, \i1, \i2, \i3
|
|
.endm
|
|
|
|
.macro decrypt_block, in, rounds, t0, t1, t2
|
|
do_block_Nx d, \rounds, \in
|
|
.endm
|
|
|
|
.macro decrypt_block2x, i0, i1, rounds, t0, t1, t2
|
|
do_block_Nx d, \rounds, \i0, \i1
|
|
.endm
|
|
|
|
.macro decrypt_block4x, i0, i1, i2, i3, rounds, t0, t1, t2
|
|
do_block_Nx d, \rounds, \i0, \i1, \i2, \i3
|
|
.endm
|
|
|
|
#include "aes-modes.S"
|