497 lines
15 KiB
ArmAsm
497 lines
15 KiB
ArmAsm
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* SM4 Cipher Algorithm, AES-NI/AVX2 optimized.
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* as specified in
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* https://tools.ietf.org/id/draft-ribose-cfrg-sm4-10.html
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*
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* Copyright (C) 2018 Markku-Juhani O. Saarinen <mjos@iki.fi>
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* Copyright (C) 2020 Jussi Kivilinna <jussi.kivilinna@iki.fi>
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* Copyright (c) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
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*/
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/* Based on SM4 AES-NI work by libgcrypt and Markku-Juhani O. Saarinen at:
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* https://github.com/mjosaarinen/sm4ni
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*/
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#include <linux/linkage.h>
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#include <linux/cfi_types.h>
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#include <asm/frame.h>
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#define rRIP (%rip)
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/* vector registers */
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#define RX0 %ymm0
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#define RX1 %ymm1
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#define MASK_4BIT %ymm2
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#define RTMP0 %ymm3
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#define RTMP1 %ymm4
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#define RTMP2 %ymm5
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#define RTMP3 %ymm6
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#define RTMP4 %ymm7
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#define RA0 %ymm8
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#define RA1 %ymm9
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#define RA2 %ymm10
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#define RA3 %ymm11
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#define RB0 %ymm12
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#define RB1 %ymm13
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#define RB2 %ymm14
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#define RB3 %ymm15
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#define RNOT %ymm0
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#define RBSWAP %ymm1
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#define RX0x %xmm0
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#define RX1x %xmm1
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#define MASK_4BITx %xmm2
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#define RNOTx %xmm0
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#define RBSWAPx %xmm1
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#define RTMP0x %xmm3
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#define RTMP1x %xmm4
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#define RTMP2x %xmm5
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#define RTMP3x %xmm6
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#define RTMP4x %xmm7
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/* helper macros */
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/* Transpose four 32-bit words between 128-bit vector lanes. */
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#define transpose_4x4(x0, x1, x2, x3, t1, t2) \
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vpunpckhdq x1, x0, t2; \
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vpunpckldq x1, x0, x0; \
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\
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vpunpckldq x3, x2, t1; \
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vpunpckhdq x3, x2, x2; \
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\
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vpunpckhqdq t1, x0, x1; \
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vpunpcklqdq t1, x0, x0; \
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\
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vpunpckhqdq x2, t2, x3; \
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vpunpcklqdq x2, t2, x2;
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/* post-SubByte transform. */
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#define transform_pre(x, lo_t, hi_t, mask4bit, tmp0) \
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vpand x, mask4bit, tmp0; \
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vpandn x, mask4bit, x; \
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vpsrld $4, x, x; \
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\
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vpshufb tmp0, lo_t, tmp0; \
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vpshufb x, hi_t, x; \
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vpxor tmp0, x, x;
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/* post-SubByte transform. Note: x has been XOR'ed with mask4bit by
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* 'vaeslastenc' instruction. */
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#define transform_post(x, lo_t, hi_t, mask4bit, tmp0) \
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vpandn mask4bit, x, tmp0; \
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vpsrld $4, x, x; \
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vpand x, mask4bit, x; \
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\
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vpshufb tmp0, lo_t, tmp0; \
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vpshufb x, hi_t, x; \
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vpxor tmp0, x, x;
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.section .rodata.cst16, "aM", @progbits, 16
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.align 16
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/*
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* Following four affine transform look-up tables are from work by
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* Markku-Juhani O. Saarinen, at https://github.com/mjosaarinen/sm4ni
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*
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* These allow exposing SM4 S-Box from AES SubByte.
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*/
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/* pre-SubByte affine transform, from SM4 field to AES field. */
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.Lpre_tf_lo_s:
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.quad 0x9197E2E474720701, 0xC7C1B4B222245157
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.Lpre_tf_hi_s:
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.quad 0xE240AB09EB49A200, 0xF052B91BF95BB012
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/* post-SubByte affine transform, from AES field to SM4 field. */
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.Lpost_tf_lo_s:
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.quad 0x5B67F2CEA19D0834, 0xEDD14478172BBE82
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.Lpost_tf_hi_s:
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.quad 0xAE7201DD73AFDC00, 0x11CDBE62CC1063BF
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/* For isolating SubBytes from AESENCLAST, inverse shift row */
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.Linv_shift_row:
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.byte 0x00, 0x0d, 0x0a, 0x07, 0x04, 0x01, 0x0e, 0x0b
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.byte 0x08, 0x05, 0x02, 0x0f, 0x0c, 0x09, 0x06, 0x03
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/* Inverse shift row + Rotate left by 8 bits on 32-bit words with vpshufb */
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.Linv_shift_row_rol_8:
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.byte 0x07, 0x00, 0x0d, 0x0a, 0x0b, 0x04, 0x01, 0x0e
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.byte 0x0f, 0x08, 0x05, 0x02, 0x03, 0x0c, 0x09, 0x06
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/* Inverse shift row + Rotate left by 16 bits on 32-bit words with vpshufb */
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.Linv_shift_row_rol_16:
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.byte 0x0a, 0x07, 0x00, 0x0d, 0x0e, 0x0b, 0x04, 0x01
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.byte 0x02, 0x0f, 0x08, 0x05, 0x06, 0x03, 0x0c, 0x09
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/* Inverse shift row + Rotate left by 24 bits on 32-bit words with vpshufb */
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.Linv_shift_row_rol_24:
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.byte 0x0d, 0x0a, 0x07, 0x00, 0x01, 0x0e, 0x0b, 0x04
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.byte 0x05, 0x02, 0x0f, 0x08, 0x09, 0x06, 0x03, 0x0c
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/* For CTR-mode IV byteswap */
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.Lbswap128_mask:
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.byte 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
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/* For input word byte-swap */
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.Lbswap32_mask:
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.byte 3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12
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.align 4
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/* 4-bit mask */
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.L0f0f0f0f:
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.long 0x0f0f0f0f
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/* 12 bytes, only for padding */
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.Lpadding_deadbeef:
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.long 0xdeadbeef, 0xdeadbeef, 0xdeadbeef
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.text
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SYM_FUNC_START_LOCAL(__sm4_crypt_blk16)
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/* input:
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* %rdi: round key array, CTX
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* RA0, RA1, RA2, RA3, RB0, RB1, RB2, RB3: sixteen parallel
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* plaintext blocks
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* output:
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* RA0, RA1, RA2, RA3, RB0, RB1, RB2, RB3: sixteen parallel
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* ciphertext blocks
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*/
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FRAME_BEGIN
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vbroadcasti128 .Lbswap32_mask rRIP, RTMP2;
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vpshufb RTMP2, RA0, RA0;
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vpshufb RTMP2, RA1, RA1;
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vpshufb RTMP2, RA2, RA2;
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vpshufb RTMP2, RA3, RA3;
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vpshufb RTMP2, RB0, RB0;
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vpshufb RTMP2, RB1, RB1;
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vpshufb RTMP2, RB2, RB2;
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vpshufb RTMP2, RB3, RB3;
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vpbroadcastd .L0f0f0f0f rRIP, MASK_4BIT;
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transpose_4x4(RA0, RA1, RA2, RA3, RTMP0, RTMP1);
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transpose_4x4(RB0, RB1, RB2, RB3, RTMP0, RTMP1);
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#define ROUND(round, s0, s1, s2, s3, r0, r1, r2, r3) \
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vpbroadcastd (4*(round))(%rdi), RX0; \
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vbroadcasti128 .Lpre_tf_lo_s rRIP, RTMP4; \
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vbroadcasti128 .Lpre_tf_hi_s rRIP, RTMP1; \
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vmovdqa RX0, RX1; \
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vpxor s1, RX0, RX0; \
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vpxor s2, RX0, RX0; \
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vpxor s3, RX0, RX0; /* s1 ^ s2 ^ s3 ^ rk */ \
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vbroadcasti128 .Lpost_tf_lo_s rRIP, RTMP2; \
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vbroadcasti128 .Lpost_tf_hi_s rRIP, RTMP3; \
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vpxor r1, RX1, RX1; \
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vpxor r2, RX1, RX1; \
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vpxor r3, RX1, RX1; /* r1 ^ r2 ^ r3 ^ rk */ \
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\
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/* sbox, non-linear part */ \
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transform_pre(RX0, RTMP4, RTMP1, MASK_4BIT, RTMP0); \
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transform_pre(RX1, RTMP4, RTMP1, MASK_4BIT, RTMP0); \
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vextracti128 $1, RX0, RTMP4x; \
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vextracti128 $1, RX1, RTMP0x; \
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vaesenclast MASK_4BITx, RX0x, RX0x; \
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vaesenclast MASK_4BITx, RTMP4x, RTMP4x; \
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vaesenclast MASK_4BITx, RX1x, RX1x; \
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vaesenclast MASK_4BITx, RTMP0x, RTMP0x; \
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vinserti128 $1, RTMP4x, RX0, RX0; \
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vbroadcasti128 .Linv_shift_row rRIP, RTMP4; \
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vinserti128 $1, RTMP0x, RX1, RX1; \
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transform_post(RX0, RTMP2, RTMP3, MASK_4BIT, RTMP0); \
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transform_post(RX1, RTMP2, RTMP3, MASK_4BIT, RTMP0); \
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\
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/* linear part */ \
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vpshufb RTMP4, RX0, RTMP0; \
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vpxor RTMP0, s0, s0; /* s0 ^ x */ \
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vpshufb RTMP4, RX1, RTMP2; \
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vbroadcasti128 .Linv_shift_row_rol_8 rRIP, RTMP4; \
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vpxor RTMP2, r0, r0; /* r0 ^ x */ \
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vpshufb RTMP4, RX0, RTMP1; \
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vpxor RTMP1, RTMP0, RTMP0; /* x ^ rol(x,8) */ \
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vpshufb RTMP4, RX1, RTMP3; \
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vbroadcasti128 .Linv_shift_row_rol_16 rRIP, RTMP4; \
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vpxor RTMP3, RTMP2, RTMP2; /* x ^ rol(x,8) */ \
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vpshufb RTMP4, RX0, RTMP1; \
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vpxor RTMP1, RTMP0, RTMP0; /* x ^ rol(x,8) ^ rol(x,16) */ \
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vpshufb RTMP4, RX1, RTMP3; \
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vbroadcasti128 .Linv_shift_row_rol_24 rRIP, RTMP4; \
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vpxor RTMP3, RTMP2, RTMP2; /* x ^ rol(x,8) ^ rol(x,16) */ \
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vpshufb RTMP4, RX0, RTMP1; \
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vpxor RTMP1, s0, s0; /* s0 ^ x ^ rol(x,24) */ \
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vpslld $2, RTMP0, RTMP1; \
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vpsrld $30, RTMP0, RTMP0; \
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vpxor RTMP0, s0, s0; \
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/* s0 ^ x ^ rol(x,2) ^ rol(x,10) ^ rol(x,18) ^ rol(x,24) */ \
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vpxor RTMP1, s0, s0; \
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vpshufb RTMP4, RX1, RTMP3; \
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vpxor RTMP3, r0, r0; /* r0 ^ x ^ rol(x,24) */ \
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vpslld $2, RTMP2, RTMP3; \
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vpsrld $30, RTMP2, RTMP2; \
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vpxor RTMP2, r0, r0; \
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/* r0 ^ x ^ rol(x,2) ^ rol(x,10) ^ rol(x,18) ^ rol(x,24) */ \
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vpxor RTMP3, r0, r0;
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leaq (32*4)(%rdi), %rax;
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.align 16
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.Lroundloop_blk8:
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ROUND(0, RA0, RA1, RA2, RA3, RB0, RB1, RB2, RB3);
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ROUND(1, RA1, RA2, RA3, RA0, RB1, RB2, RB3, RB0);
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ROUND(2, RA2, RA3, RA0, RA1, RB2, RB3, RB0, RB1);
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ROUND(3, RA3, RA0, RA1, RA2, RB3, RB0, RB1, RB2);
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leaq (4*4)(%rdi), %rdi;
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cmpq %rax, %rdi;
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jne .Lroundloop_blk8;
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#undef ROUND
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vbroadcasti128 .Lbswap128_mask rRIP, RTMP2;
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transpose_4x4(RA0, RA1, RA2, RA3, RTMP0, RTMP1);
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transpose_4x4(RB0, RB1, RB2, RB3, RTMP0, RTMP1);
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vpshufb RTMP2, RA0, RA0;
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vpshufb RTMP2, RA1, RA1;
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vpshufb RTMP2, RA2, RA2;
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vpshufb RTMP2, RA3, RA3;
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vpshufb RTMP2, RB0, RB0;
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vpshufb RTMP2, RB1, RB1;
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vpshufb RTMP2, RB2, RB2;
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vpshufb RTMP2, RB3, RB3;
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FRAME_END
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RET;
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SYM_FUNC_END(__sm4_crypt_blk16)
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#define inc_le128(x, minus_one, tmp) \
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vpcmpeqq minus_one, x, tmp; \
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vpsubq minus_one, x, x; \
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vpslldq $8, tmp, tmp; \
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vpsubq tmp, x, x;
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/*
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* void sm4_aesni_avx2_ctr_enc_blk16(const u32 *rk, u8 *dst,
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* const u8 *src, u8 *iv)
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*/
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SYM_TYPED_FUNC_START(sm4_aesni_avx2_ctr_enc_blk16)
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/* input:
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* %rdi: round key array, CTX
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* %rsi: dst (16 blocks)
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* %rdx: src (16 blocks)
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* %rcx: iv (big endian, 128bit)
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*/
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FRAME_BEGIN
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movq 8(%rcx), %rax;
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bswapq %rax;
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vzeroupper;
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vbroadcasti128 .Lbswap128_mask rRIP, RTMP3;
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vpcmpeqd RNOT, RNOT, RNOT;
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vpsrldq $8, RNOT, RNOT; /* ab: -1:0 ; cd: -1:0 */
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vpaddq RNOT, RNOT, RTMP2; /* ab: -2:0 ; cd: -2:0 */
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/* load IV and byteswap */
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vmovdqu (%rcx), RTMP4x;
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vpshufb RTMP3x, RTMP4x, RTMP4x;
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vmovdqa RTMP4x, RTMP0x;
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inc_le128(RTMP4x, RNOTx, RTMP1x);
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vinserti128 $1, RTMP4x, RTMP0, RTMP0;
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vpshufb RTMP3, RTMP0, RA0; /* +1 ; +0 */
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/* check need for handling 64-bit overflow and carry */
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cmpq $(0xffffffffffffffff - 16), %rax;
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ja .Lhandle_ctr_carry;
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/* construct IVs */
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vpsubq RTMP2, RTMP0, RTMP0; /* +3 ; +2 */
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vpshufb RTMP3, RTMP0, RA1;
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vpsubq RTMP2, RTMP0, RTMP0; /* +5 ; +4 */
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vpshufb RTMP3, RTMP0, RA2;
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vpsubq RTMP2, RTMP0, RTMP0; /* +7 ; +6 */
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vpshufb RTMP3, RTMP0, RA3;
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vpsubq RTMP2, RTMP0, RTMP0; /* +9 ; +8 */
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vpshufb RTMP3, RTMP0, RB0;
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vpsubq RTMP2, RTMP0, RTMP0; /* +11 ; +10 */
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vpshufb RTMP3, RTMP0, RB1;
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vpsubq RTMP2, RTMP0, RTMP0; /* +13 ; +12 */
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vpshufb RTMP3, RTMP0, RB2;
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vpsubq RTMP2, RTMP0, RTMP0; /* +15 ; +14 */
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vpshufb RTMP3, RTMP0, RB3;
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vpsubq RTMP2, RTMP0, RTMP0; /* +16 */
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vpshufb RTMP3x, RTMP0x, RTMP0x;
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jmp .Lctr_carry_done;
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.Lhandle_ctr_carry:
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/* construct IVs */
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inc_le128(RTMP0, RNOT, RTMP1);
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inc_le128(RTMP0, RNOT, RTMP1);
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vpshufb RTMP3, RTMP0, RA1; /* +3 ; +2 */
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inc_le128(RTMP0, RNOT, RTMP1);
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inc_le128(RTMP0, RNOT, RTMP1);
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vpshufb RTMP3, RTMP0, RA2; /* +5 ; +4 */
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inc_le128(RTMP0, RNOT, RTMP1);
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inc_le128(RTMP0, RNOT, RTMP1);
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vpshufb RTMP3, RTMP0, RA3; /* +7 ; +6 */
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inc_le128(RTMP0, RNOT, RTMP1);
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inc_le128(RTMP0, RNOT, RTMP1);
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vpshufb RTMP3, RTMP0, RB0; /* +9 ; +8 */
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inc_le128(RTMP0, RNOT, RTMP1);
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inc_le128(RTMP0, RNOT, RTMP1);
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vpshufb RTMP3, RTMP0, RB1; /* +11 ; +10 */
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inc_le128(RTMP0, RNOT, RTMP1);
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inc_le128(RTMP0, RNOT, RTMP1);
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vpshufb RTMP3, RTMP0, RB2; /* +13 ; +12 */
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inc_le128(RTMP0, RNOT, RTMP1);
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inc_le128(RTMP0, RNOT, RTMP1);
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vpshufb RTMP3, RTMP0, RB3; /* +15 ; +14 */
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inc_le128(RTMP0, RNOT, RTMP1);
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vextracti128 $1, RTMP0, RTMP0x;
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vpshufb RTMP3x, RTMP0x, RTMP0x; /* +16 */
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.align 4
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.Lctr_carry_done:
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/* store new IV */
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vmovdqu RTMP0x, (%rcx);
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call __sm4_crypt_blk16;
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vpxor (0 * 32)(%rdx), RA0, RA0;
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vpxor (1 * 32)(%rdx), RA1, RA1;
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vpxor (2 * 32)(%rdx), RA2, RA2;
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vpxor (3 * 32)(%rdx), RA3, RA3;
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vpxor (4 * 32)(%rdx), RB0, RB0;
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vpxor (5 * 32)(%rdx), RB1, RB1;
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vpxor (6 * 32)(%rdx), RB2, RB2;
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vpxor (7 * 32)(%rdx), RB3, RB3;
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vmovdqu RA0, (0 * 32)(%rsi);
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vmovdqu RA1, (1 * 32)(%rsi);
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vmovdqu RA2, (2 * 32)(%rsi);
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vmovdqu RA3, (3 * 32)(%rsi);
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vmovdqu RB0, (4 * 32)(%rsi);
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vmovdqu RB1, (5 * 32)(%rsi);
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vmovdqu RB2, (6 * 32)(%rsi);
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vmovdqu RB3, (7 * 32)(%rsi);
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vzeroall;
|
|
FRAME_END
|
|
RET;
|
|
SYM_FUNC_END(sm4_aesni_avx2_ctr_enc_blk16)
|
|
|
|
/*
|
|
* void sm4_aesni_avx2_cbc_dec_blk16(const u32 *rk, u8 *dst,
|
|
* const u8 *src, u8 *iv)
|
|
*/
|
|
SYM_TYPED_FUNC_START(sm4_aesni_avx2_cbc_dec_blk16)
|
|
/* input:
|
|
* %rdi: round key array, CTX
|
|
* %rsi: dst (16 blocks)
|
|
* %rdx: src (16 blocks)
|
|
* %rcx: iv
|
|
*/
|
|
FRAME_BEGIN
|
|
|
|
vzeroupper;
|
|
|
|
vmovdqu (0 * 32)(%rdx), RA0;
|
|
vmovdqu (1 * 32)(%rdx), RA1;
|
|
vmovdqu (2 * 32)(%rdx), RA2;
|
|
vmovdqu (3 * 32)(%rdx), RA3;
|
|
vmovdqu (4 * 32)(%rdx), RB0;
|
|
vmovdqu (5 * 32)(%rdx), RB1;
|
|
vmovdqu (6 * 32)(%rdx), RB2;
|
|
vmovdqu (7 * 32)(%rdx), RB3;
|
|
|
|
call __sm4_crypt_blk16;
|
|
|
|
vmovdqu (%rcx), RNOTx;
|
|
vinserti128 $1, (%rdx), RNOT, RNOT;
|
|
vpxor RNOT, RA0, RA0;
|
|
vpxor (0 * 32 + 16)(%rdx), RA1, RA1;
|
|
vpxor (1 * 32 + 16)(%rdx), RA2, RA2;
|
|
vpxor (2 * 32 + 16)(%rdx), RA3, RA3;
|
|
vpxor (3 * 32 + 16)(%rdx), RB0, RB0;
|
|
vpxor (4 * 32 + 16)(%rdx), RB1, RB1;
|
|
vpxor (5 * 32 + 16)(%rdx), RB2, RB2;
|
|
vpxor (6 * 32 + 16)(%rdx), RB3, RB3;
|
|
vmovdqu (7 * 32 + 16)(%rdx), RNOTx;
|
|
vmovdqu RNOTx, (%rcx); /* store new IV */
|
|
|
|
vmovdqu RA0, (0 * 32)(%rsi);
|
|
vmovdqu RA1, (1 * 32)(%rsi);
|
|
vmovdqu RA2, (2 * 32)(%rsi);
|
|
vmovdqu RA3, (3 * 32)(%rsi);
|
|
vmovdqu RB0, (4 * 32)(%rsi);
|
|
vmovdqu RB1, (5 * 32)(%rsi);
|
|
vmovdqu RB2, (6 * 32)(%rsi);
|
|
vmovdqu RB3, (7 * 32)(%rsi);
|
|
|
|
vzeroall;
|
|
FRAME_END
|
|
RET;
|
|
SYM_FUNC_END(sm4_aesni_avx2_cbc_dec_blk16)
|
|
|
|
/*
|
|
* void sm4_aesni_avx2_cfb_dec_blk16(const u32 *rk, u8 *dst,
|
|
* const u8 *src, u8 *iv)
|
|
*/
|
|
SYM_TYPED_FUNC_START(sm4_aesni_avx2_cfb_dec_blk16)
|
|
/* input:
|
|
* %rdi: round key array, CTX
|
|
* %rsi: dst (16 blocks)
|
|
* %rdx: src (16 blocks)
|
|
* %rcx: iv
|
|
*/
|
|
FRAME_BEGIN
|
|
|
|
vzeroupper;
|
|
|
|
/* Load input */
|
|
vmovdqu (%rcx), RNOTx;
|
|
vinserti128 $1, (%rdx), RNOT, RA0;
|
|
vmovdqu (0 * 32 + 16)(%rdx), RA1;
|
|
vmovdqu (1 * 32 + 16)(%rdx), RA2;
|
|
vmovdqu (2 * 32 + 16)(%rdx), RA3;
|
|
vmovdqu (3 * 32 + 16)(%rdx), RB0;
|
|
vmovdqu (4 * 32 + 16)(%rdx), RB1;
|
|
vmovdqu (5 * 32 + 16)(%rdx), RB2;
|
|
vmovdqu (6 * 32 + 16)(%rdx), RB3;
|
|
|
|
/* Update IV */
|
|
vmovdqu (7 * 32 + 16)(%rdx), RNOTx;
|
|
vmovdqu RNOTx, (%rcx);
|
|
|
|
call __sm4_crypt_blk16;
|
|
|
|
vpxor (0 * 32)(%rdx), RA0, RA0;
|
|
vpxor (1 * 32)(%rdx), RA1, RA1;
|
|
vpxor (2 * 32)(%rdx), RA2, RA2;
|
|
vpxor (3 * 32)(%rdx), RA3, RA3;
|
|
vpxor (4 * 32)(%rdx), RB0, RB0;
|
|
vpxor (5 * 32)(%rdx), RB1, RB1;
|
|
vpxor (6 * 32)(%rdx), RB2, RB2;
|
|
vpxor (7 * 32)(%rdx), RB3, RB3;
|
|
|
|
vmovdqu RA0, (0 * 32)(%rsi);
|
|
vmovdqu RA1, (1 * 32)(%rsi);
|
|
vmovdqu RA2, (2 * 32)(%rsi);
|
|
vmovdqu RA3, (3 * 32)(%rsi);
|
|
vmovdqu RB0, (4 * 32)(%rsi);
|
|
vmovdqu RB1, (5 * 32)(%rsi);
|
|
vmovdqu RB2, (6 * 32)(%rsi);
|
|
vmovdqu RB3, (7 * 32)(%rsi);
|
|
|
|
vzeroall;
|
|
FRAME_END
|
|
RET;
|
|
SYM_FUNC_END(sm4_aesni_avx2_cfb_dec_blk16)
|