353 lines
12 KiB
ArmAsm
353 lines
12 KiB
ArmAsm
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/*
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* linux/arch/arm64/crypto/aes-neon.S - AES cipher for ARMv8 NEON
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*
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* Copyright (C) 2013 - 2017 Linaro Ltd. <ard.biesheuvel@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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#define AES_ENTRY(func) ENTRY(neon_ ## func)
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#define AES_ENDPROC(func) ENDPROC(neon_ ## func)
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/* multiply by polynomial 'x' in GF(2^8) */
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.macro mul_by_x, out, in, temp, const
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sshr \temp, \in, #7
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shl \out, \in, #1
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and \temp, \temp, \const
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eor \out, \out, \temp
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.endm
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/* multiply by polynomial 'x^2' in GF(2^8) */
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.macro mul_by_x2, out, in, temp, const
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ushr \temp, \in, #6
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shl \out, \in, #2
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pmul \temp, \temp, \const
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eor \out, \out, \temp
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.endm
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/* preload the entire Sbox */
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.macro prepare, sbox, shiftrows, temp
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movi v12.16b, #0x1b
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ldr_l q13, \shiftrows, \temp
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ldr_l q14, .Lror32by8, \temp
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adr_l \temp, \sbox
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ld1 {v16.16b-v19.16b}, [\temp], #64
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ld1 {v20.16b-v23.16b}, [\temp], #64
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ld1 {v24.16b-v27.16b}, [\temp], #64
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ld1 {v28.16b-v31.16b}, [\temp]
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.endm
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/* do preload for encryption */
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.macro enc_prepare, ignore0, ignore1, temp
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prepare .LForward_Sbox, .LForward_ShiftRows, \temp
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.endm
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.macro enc_switch_key, ignore0, ignore1, temp
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/* do nothing */
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.endm
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/* do preload for decryption */
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.macro dec_prepare, ignore0, ignore1, temp
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prepare .LReverse_Sbox, .LReverse_ShiftRows, \temp
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.endm
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/* apply SubBytes transformation using the the preloaded Sbox */
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.macro sub_bytes, in
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sub v9.16b, \in\().16b, v15.16b
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tbl \in\().16b, {v16.16b-v19.16b}, \in\().16b
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sub v10.16b, v9.16b, v15.16b
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tbx \in\().16b, {v20.16b-v23.16b}, v9.16b
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sub v11.16b, v10.16b, v15.16b
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tbx \in\().16b, {v24.16b-v27.16b}, v10.16b
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tbx \in\().16b, {v28.16b-v31.16b}, v11.16b
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.endm
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/* apply MixColumns transformation */
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.macro mix_columns, in, enc
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.if \enc == 0
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/* Inverse MixColumns: pre-multiply by { 5, 0, 4, 0 } */
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mul_by_x2 v8.16b, \in\().16b, v9.16b, v12.16b
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eor \in\().16b, \in\().16b, v8.16b
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rev32 v8.8h, v8.8h
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eor \in\().16b, \in\().16b, v8.16b
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.endif
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mul_by_x v9.16b, \in\().16b, v8.16b, v12.16b
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rev32 v8.8h, \in\().8h
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eor v8.16b, v8.16b, v9.16b
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eor \in\().16b, \in\().16b, v8.16b
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tbl \in\().16b, {\in\().16b}, v14.16b
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eor \in\().16b, \in\().16b, v8.16b
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.endm
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.macro do_block, enc, in, rounds, rk, rkp, i
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ld1 {v15.4s}, [\rk]
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add \rkp, \rk, #16
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mov \i, \rounds
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1111: eor \in\().16b, \in\().16b, v15.16b /* ^round key */
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movi v15.16b, #0x40
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tbl \in\().16b, {\in\().16b}, v13.16b /* ShiftRows */
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sub_bytes \in
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subs \i, \i, #1
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ld1 {v15.4s}, [\rkp], #16
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beq 2222f
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mix_columns \in, \enc
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b 1111b
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2222: eor \in\().16b, \in\().16b, v15.16b /* ^round key */
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.endm
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.macro encrypt_block, in, rounds, rk, rkp, i
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do_block 1, \in, \rounds, \rk, \rkp, \i
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.endm
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.macro decrypt_block, in, rounds, rk, rkp, i
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do_block 0, \in, \rounds, \rk, \rkp, \i
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.endm
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/*
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* Interleaved versions: functionally equivalent to the
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* ones above, but applied to 2 or 4 AES states in parallel.
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*/
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.macro sub_bytes_2x, in0, in1
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sub v8.16b, \in0\().16b, v15.16b
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tbl \in0\().16b, {v16.16b-v19.16b}, \in0\().16b
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sub v9.16b, \in1\().16b, v15.16b
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tbl \in1\().16b, {v16.16b-v19.16b}, \in1\().16b
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sub v10.16b, v8.16b, v15.16b
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tbx \in0\().16b, {v20.16b-v23.16b}, v8.16b
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sub v11.16b, v9.16b, v15.16b
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tbx \in1\().16b, {v20.16b-v23.16b}, v9.16b
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sub v8.16b, v10.16b, v15.16b
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tbx \in0\().16b, {v24.16b-v27.16b}, v10.16b
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sub v9.16b, v11.16b, v15.16b
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tbx \in1\().16b, {v24.16b-v27.16b}, v11.16b
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tbx \in0\().16b, {v28.16b-v31.16b}, v8.16b
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tbx \in1\().16b, {v28.16b-v31.16b}, v9.16b
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.endm
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.macro sub_bytes_4x, in0, in1, in2, in3
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sub v8.16b, \in0\().16b, v15.16b
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tbl \in0\().16b, {v16.16b-v19.16b}, \in0\().16b
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sub v9.16b, \in1\().16b, v15.16b
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tbl \in1\().16b, {v16.16b-v19.16b}, \in1\().16b
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sub v10.16b, \in2\().16b, v15.16b
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tbl \in2\().16b, {v16.16b-v19.16b}, \in2\().16b
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sub v11.16b, \in3\().16b, v15.16b
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tbl \in3\().16b, {v16.16b-v19.16b}, \in3\().16b
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tbx \in0\().16b, {v20.16b-v23.16b}, v8.16b
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tbx \in1\().16b, {v20.16b-v23.16b}, v9.16b
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sub v8.16b, v8.16b, v15.16b
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tbx \in2\().16b, {v20.16b-v23.16b}, v10.16b
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sub v9.16b, v9.16b, v15.16b
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tbx \in3\().16b, {v20.16b-v23.16b}, v11.16b
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sub v10.16b, v10.16b, v15.16b
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tbx \in0\().16b, {v24.16b-v27.16b}, v8.16b
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sub v11.16b, v11.16b, v15.16b
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tbx \in1\().16b, {v24.16b-v27.16b}, v9.16b
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sub v8.16b, v8.16b, v15.16b
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tbx \in2\().16b, {v24.16b-v27.16b}, v10.16b
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sub v9.16b, v9.16b, v15.16b
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tbx \in3\().16b, {v24.16b-v27.16b}, v11.16b
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sub v10.16b, v10.16b, v15.16b
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tbx \in0\().16b, {v28.16b-v31.16b}, v8.16b
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sub v11.16b, v11.16b, v15.16b
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tbx \in1\().16b, {v28.16b-v31.16b}, v9.16b
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tbx \in2\().16b, {v28.16b-v31.16b}, v10.16b
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tbx \in3\().16b, {v28.16b-v31.16b}, v11.16b
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.endm
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.macro mul_by_x_2x, out0, out1, in0, in1, tmp0, tmp1, const
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sshr \tmp0\().16b, \in0\().16b, #7
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shl \out0\().16b, \in0\().16b, #1
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sshr \tmp1\().16b, \in1\().16b, #7
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and \tmp0\().16b, \tmp0\().16b, \const\().16b
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shl \out1\().16b, \in1\().16b, #1
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and \tmp1\().16b, \tmp1\().16b, \const\().16b
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eor \out0\().16b, \out0\().16b, \tmp0\().16b
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eor \out1\().16b, \out1\().16b, \tmp1\().16b
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.endm
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.macro mul_by_x2_2x, out0, out1, in0, in1, tmp0, tmp1, const
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ushr \tmp0\().16b, \in0\().16b, #6
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shl \out0\().16b, \in0\().16b, #2
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ushr \tmp1\().16b, \in1\().16b, #6
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pmul \tmp0\().16b, \tmp0\().16b, \const\().16b
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shl \out1\().16b, \in1\().16b, #2
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pmul \tmp1\().16b, \tmp1\().16b, \const\().16b
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eor \out0\().16b, \out0\().16b, \tmp0\().16b
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eor \out1\().16b, \out1\().16b, \tmp1\().16b
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.endm
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.macro mix_columns_2x, in0, in1, enc
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.if \enc == 0
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/* Inverse MixColumns: pre-multiply by { 5, 0, 4, 0 } */
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mul_by_x2_2x v8, v9, \in0, \in1, v10, v11, v12
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eor \in0\().16b, \in0\().16b, v8.16b
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rev32 v8.8h, v8.8h
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eor \in1\().16b, \in1\().16b, v9.16b
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rev32 v9.8h, v9.8h
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eor \in0\().16b, \in0\().16b, v8.16b
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eor \in1\().16b, \in1\().16b, v9.16b
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.endif
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mul_by_x_2x v8, v9, \in0, \in1, v10, v11, v12
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rev32 v10.8h, \in0\().8h
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rev32 v11.8h, \in1\().8h
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eor v10.16b, v10.16b, v8.16b
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eor v11.16b, v11.16b, v9.16b
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eor \in0\().16b, \in0\().16b, v10.16b
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eor \in1\().16b, \in1\().16b, v11.16b
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tbl \in0\().16b, {\in0\().16b}, v14.16b
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tbl \in1\().16b, {\in1\().16b}, v14.16b
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eor \in0\().16b, \in0\().16b, v10.16b
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eor \in1\().16b, \in1\().16b, v11.16b
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.endm
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.macro do_block_2x, enc, in0, in1, rounds, rk, rkp, i
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ld1 {v15.4s}, [\rk]
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add \rkp, \rk, #16
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mov \i, \rounds
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1111: eor \in0\().16b, \in0\().16b, v15.16b /* ^round key */
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eor \in1\().16b, \in1\().16b, v15.16b /* ^round key */
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movi v15.16b, #0x40
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tbl \in0\().16b, {\in0\().16b}, v13.16b /* ShiftRows */
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tbl \in1\().16b, {\in1\().16b}, v13.16b /* ShiftRows */
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sub_bytes_2x \in0, \in1
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subs \i, \i, #1
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ld1 {v15.4s}, [\rkp], #16
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beq 2222f
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mix_columns_2x \in0, \in1, \enc
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b 1111b
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2222: eor \in0\().16b, \in0\().16b, v15.16b /* ^round key */
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eor \in1\().16b, \in1\().16b, v15.16b /* ^round key */
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.endm
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.macro do_block_4x, enc, in0, in1, in2, in3, rounds, rk, rkp, i
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ld1 {v15.4s}, [\rk]
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add \rkp, \rk, #16
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mov \i, \rounds
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1111: eor \in0\().16b, \in0\().16b, v15.16b /* ^round key */
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eor \in1\().16b, \in1\().16b, v15.16b /* ^round key */
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eor \in2\().16b, \in2\().16b, v15.16b /* ^round key */
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eor \in3\().16b, \in3\().16b, v15.16b /* ^round key */
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movi v15.16b, #0x40
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tbl \in0\().16b, {\in0\().16b}, v13.16b /* ShiftRows */
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tbl \in1\().16b, {\in1\().16b}, v13.16b /* ShiftRows */
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tbl \in2\().16b, {\in2\().16b}, v13.16b /* ShiftRows */
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tbl \in3\().16b, {\in3\().16b}, v13.16b /* ShiftRows */
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sub_bytes_4x \in0, \in1, \in2, \in3
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subs \i, \i, #1
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ld1 {v15.4s}, [\rkp], #16
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beq 2222f
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mix_columns_2x \in0, \in1, \enc
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mix_columns_2x \in2, \in3, \enc
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b 1111b
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2222: eor \in0\().16b, \in0\().16b, v15.16b /* ^round key */
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eor \in1\().16b, \in1\().16b, v15.16b /* ^round key */
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eor \in2\().16b, \in2\().16b, v15.16b /* ^round key */
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eor \in3\().16b, \in3\().16b, v15.16b /* ^round key */
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.endm
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.macro encrypt_block2x, in0, in1, rounds, rk, rkp, i
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do_block_2x 1, \in0, \in1, \rounds, \rk, \rkp, \i
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.endm
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.macro decrypt_block2x, in0, in1, rounds, rk, rkp, i
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do_block_2x 0, \in0, \in1, \rounds, \rk, \rkp, \i
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.endm
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.macro encrypt_block4x, in0, in1, in2, in3, rounds, rk, rkp, i
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do_block_4x 1, \in0, \in1, \in2, \in3, \rounds, \rk, \rkp, \i
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.endm
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.macro decrypt_block4x, in0, in1, in2, in3, rounds, rk, rkp, i
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do_block_4x 0, \in0, \in1, \in2, \in3, \rounds, \rk, \rkp, \i
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.endm
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#include "aes-modes.S"
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.section ".rodata", "a"
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.align 6
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.LForward_Sbox:
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.byte 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5
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.byte 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76
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.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
|