457 lines
10 KiB
ArmAsm
457 lines
10 KiB
ArmAsm
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Twofish Cipher 8-way parallel algorithm (AVX/x86_64)
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*
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* Copyright (C) 2012 Johannes Goetzfried
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* <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
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*
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* Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
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*/
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#include <linux/linkage.h>
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#include <asm/frame.h>
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#include "glue_helper-asm-avx.S"
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.file "twofish-avx-x86_64-asm_64.S"
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.section .rodata.cst16.bswap128_mask, "aM", @progbits, 16
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.align 16
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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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.section .rodata.cst16.xts_gf128mul_and_shl1_mask, "aM", @progbits, 16
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.align 16
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.Lxts_gf128mul_and_shl1_mask:
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.byte 0x87, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0
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.text
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/* structure of crypto context */
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#define s0 0
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#define s1 1024
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#define s2 2048
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#define s3 3072
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#define w 4096
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#define k 4128
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/**********************************************************************
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8-way AVX twofish
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**********************************************************************/
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#define CTX %rdi
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#define RA1 %xmm0
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#define RB1 %xmm1
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#define RC1 %xmm2
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#define RD1 %xmm3
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#define RA2 %xmm4
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#define RB2 %xmm5
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#define RC2 %xmm6
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#define RD2 %xmm7
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#define RX0 %xmm8
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#define RY0 %xmm9
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#define RX1 %xmm10
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#define RY1 %xmm11
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#define RK1 %xmm12
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#define RK2 %xmm13
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#define RT %xmm14
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#define RR %xmm15
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#define RID1 %r13
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#define RID1d %r13d
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#define RID2 %rsi
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#define RID2d %esi
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#define RGI1 %rdx
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#define RGI1bl %dl
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#define RGI1bh %dh
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#define RGI2 %rcx
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#define RGI2bl %cl
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#define RGI2bh %ch
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#define RGI3 %rax
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#define RGI3bl %al
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#define RGI3bh %ah
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#define RGI4 %rbx
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#define RGI4bl %bl
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#define RGI4bh %bh
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#define RGS1 %r8
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#define RGS1d %r8d
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#define RGS2 %r9
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#define RGS2d %r9d
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#define RGS3 %r10
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#define RGS3d %r10d
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#define lookup_32bit(t0, t1, t2, t3, src, dst, interleave_op, il_reg) \
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movzbl src ## bl, RID1d; \
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movzbl src ## bh, RID2d; \
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shrq $16, src; \
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movl t0(CTX, RID1, 4), dst ## d; \
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movl t1(CTX, RID2, 4), RID2d; \
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movzbl src ## bl, RID1d; \
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xorl RID2d, dst ## d; \
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movzbl src ## bh, RID2d; \
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interleave_op(il_reg); \
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xorl t2(CTX, RID1, 4), dst ## d; \
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xorl t3(CTX, RID2, 4), dst ## d;
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#define dummy(d) /* do nothing */
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#define shr_next(reg) \
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shrq $16, reg;
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#define G(gi1, gi2, x, t0, t1, t2, t3) \
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lookup_32bit(t0, t1, t2, t3, ##gi1, RGS1, shr_next, ##gi1); \
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lookup_32bit(t0, t1, t2, t3, ##gi2, RGS3, shr_next, ##gi2); \
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\
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lookup_32bit(t0, t1, t2, t3, ##gi1, RGS2, dummy, none); \
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shlq $32, RGS2; \
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orq RGS1, RGS2; \
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lookup_32bit(t0, t1, t2, t3, ##gi2, RGS1, dummy, none); \
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shlq $32, RGS1; \
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orq RGS1, RGS3;
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#define round_head_2(a, b, x1, y1, x2, y2) \
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vmovq b ## 1, RGI3; \
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vpextrq $1, b ## 1, RGI4; \
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\
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G(RGI1, RGI2, x1, s0, s1, s2, s3); \
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vmovq a ## 2, RGI1; \
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vpextrq $1, a ## 2, RGI2; \
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vmovq RGS2, x1; \
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vpinsrq $1, RGS3, x1, x1; \
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\
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G(RGI3, RGI4, y1, s1, s2, s3, s0); \
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vmovq b ## 2, RGI3; \
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vpextrq $1, b ## 2, RGI4; \
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vmovq RGS2, y1; \
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vpinsrq $1, RGS3, y1, y1; \
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\
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G(RGI1, RGI2, x2, s0, s1, s2, s3); \
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vmovq RGS2, x2; \
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vpinsrq $1, RGS3, x2, x2; \
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\
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G(RGI3, RGI4, y2, s1, s2, s3, s0); \
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vmovq RGS2, y2; \
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vpinsrq $1, RGS3, y2, y2;
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#define encround_tail(a, b, c, d, x, y, prerotate) \
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vpaddd x, y, x; \
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vpaddd x, RK1, RT;\
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prerotate(b); \
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vpxor RT, c, c; \
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vpaddd y, x, y; \
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vpaddd y, RK2, y; \
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vpsrld $1, c, RT; \
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vpslld $(32 - 1), c, c; \
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vpor c, RT, c; \
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vpxor d, y, d; \
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#define decround_tail(a, b, c, d, x, y, prerotate) \
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vpaddd x, y, x; \
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vpaddd x, RK1, RT;\
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prerotate(a); \
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vpxor RT, c, c; \
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vpaddd y, x, y; \
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vpaddd y, RK2, y; \
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vpxor d, y, d; \
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vpsrld $1, d, y; \
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vpslld $(32 - 1), d, d; \
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vpor d, y, d; \
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#define rotate_1l(x) \
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vpslld $1, x, RR; \
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vpsrld $(32 - 1), x, x; \
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vpor x, RR, x;
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#define preload_rgi(c) \
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vmovq c, RGI1; \
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vpextrq $1, c, RGI2;
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#define encrypt_round(n, a, b, c, d, preload, prerotate) \
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vbroadcastss (k+4*(2*(n)))(CTX), RK1; \
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vbroadcastss (k+4*(2*(n)+1))(CTX), RK2; \
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round_head_2(a, b, RX0, RY0, RX1, RY1); \
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encround_tail(a ## 1, b ## 1, c ## 1, d ## 1, RX0, RY0, prerotate); \
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preload(c ## 1); \
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encround_tail(a ## 2, b ## 2, c ## 2, d ## 2, RX1, RY1, prerotate);
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#define decrypt_round(n, a, b, c, d, preload, prerotate) \
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vbroadcastss (k+4*(2*(n)))(CTX), RK1; \
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vbroadcastss (k+4*(2*(n)+1))(CTX), RK2; \
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round_head_2(a, b, RX0, RY0, RX1, RY1); \
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decround_tail(a ## 1, b ## 1, c ## 1, d ## 1, RX0, RY0, prerotate); \
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preload(c ## 1); \
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decround_tail(a ## 2, b ## 2, c ## 2, d ## 2, RX1, RY1, prerotate);
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#define encrypt_cycle(n) \
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encrypt_round((2*n), RA, RB, RC, RD, preload_rgi, rotate_1l); \
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encrypt_round(((2*n) + 1), RC, RD, RA, RB, preload_rgi, rotate_1l);
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#define encrypt_cycle_last(n) \
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encrypt_round((2*n), RA, RB, RC, RD, preload_rgi, rotate_1l); \
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encrypt_round(((2*n) + 1), RC, RD, RA, RB, dummy, dummy);
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#define decrypt_cycle(n) \
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decrypt_round(((2*n) + 1), RC, RD, RA, RB, preload_rgi, rotate_1l); \
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decrypt_round((2*n), RA, RB, RC, RD, preload_rgi, rotate_1l);
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#define decrypt_cycle_last(n) \
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decrypt_round(((2*n) + 1), RC, RD, RA, RB, preload_rgi, rotate_1l); \
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decrypt_round((2*n), RA, RB, RC, RD, dummy, dummy);
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#define transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
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vpunpckldq x1, x0, t0; \
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vpunpckhdq x1, x0, t2; \
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vpunpckldq x3, x2, t1; \
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vpunpckhdq x3, x2, x3; \
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\
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vpunpcklqdq t1, t0, x0; \
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vpunpckhqdq t1, t0, x1; \
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vpunpcklqdq x3, t2, x2; \
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vpunpckhqdq x3, t2, x3;
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#define inpack_blocks(x0, x1, x2, x3, wkey, t0, t1, t2) \
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vpxor x0, wkey, x0; \
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vpxor x1, wkey, x1; \
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vpxor x2, wkey, x2; \
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vpxor x3, wkey, x3; \
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\
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transpose_4x4(x0, x1, x2, x3, t0, t1, t2)
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#define outunpack_blocks(x0, x1, x2, x3, wkey, t0, t1, t2) \
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transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
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\
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vpxor x0, wkey, x0; \
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vpxor x1, wkey, x1; \
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vpxor x2, wkey, x2; \
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vpxor x3, wkey, x3;
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.align 8
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__twofish_enc_blk8:
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/* input:
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* %rdi: ctx, CTX
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* RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: blocks
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* output:
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* RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2: encrypted blocks
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*/
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vmovdqu w(CTX), RK1;
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pushq %r13;
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pushq %rbx;
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pushq %rcx;
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inpack_blocks(RA1, RB1, RC1, RD1, RK1, RX0, RY0, RK2);
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preload_rgi(RA1);
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rotate_1l(RD1);
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inpack_blocks(RA2, RB2, RC2, RD2, RK1, RX0, RY0, RK2);
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rotate_1l(RD2);
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encrypt_cycle(0);
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encrypt_cycle(1);
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encrypt_cycle(2);
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encrypt_cycle(3);
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encrypt_cycle(4);
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encrypt_cycle(5);
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encrypt_cycle(6);
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encrypt_cycle_last(7);
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vmovdqu (w+4*4)(CTX), RK1;
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popq %rcx;
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popq %rbx;
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popq %r13;
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outunpack_blocks(RC1, RD1, RA1, RB1, RK1, RX0, RY0, RK2);
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outunpack_blocks(RC2, RD2, RA2, RB2, RK1, RX0, RY0, RK2);
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ret;
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ENDPROC(__twofish_enc_blk8)
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.align 8
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__twofish_dec_blk8:
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/* input:
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* %rdi: ctx, CTX
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* RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2: encrypted blocks
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* output:
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* RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: decrypted blocks
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*/
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vmovdqu (w+4*4)(CTX), RK1;
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pushq %r13;
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pushq %rbx;
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inpack_blocks(RC1, RD1, RA1, RB1, RK1, RX0, RY0, RK2);
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preload_rgi(RC1);
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rotate_1l(RA1);
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inpack_blocks(RC2, RD2, RA2, RB2, RK1, RX0, RY0, RK2);
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rotate_1l(RA2);
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decrypt_cycle(7);
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decrypt_cycle(6);
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decrypt_cycle(5);
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decrypt_cycle(4);
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decrypt_cycle(3);
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decrypt_cycle(2);
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decrypt_cycle(1);
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decrypt_cycle_last(0);
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vmovdqu (w)(CTX), RK1;
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popq %rbx;
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popq %r13;
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outunpack_blocks(RA1, RB1, RC1, RD1, RK1, RX0, RY0, RK2);
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outunpack_blocks(RA2, RB2, RC2, RD2, RK1, RX0, RY0, RK2);
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ret;
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ENDPROC(__twofish_dec_blk8)
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ENTRY(twofish_ecb_enc_8way)
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/* input:
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* %rdi: ctx, CTX
|
|||
|
|
* %rsi: dst
|
|||
|
|
* %rdx: src
|
|||
|
|
*/
|
|||
|
|
FRAME_BEGIN
|
|||
|
|
|
|||
|
|
movq %rsi, %r11;
|
|||
|
|
|
|||
|
|
load_8way(%rdx, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
|
|||
|
|
|
|||
|
|
call __twofish_enc_blk8;
|
|||
|
|
|
|||
|
|
store_8way(%r11, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
|
|||
|
|
|
|||
|
|
FRAME_END
|
|||
|
|
ret;
|
|||
|
|
ENDPROC(twofish_ecb_enc_8way)
|
|||
|
|
|
|||
|
|
ENTRY(twofish_ecb_dec_8way)
|
|||
|
|
/* input:
|
|||
|
|
* %rdi: ctx, CTX
|
|||
|
|
* %rsi: dst
|
|||
|
|
* %rdx: src
|
|||
|
|
*/
|
|||
|
|
FRAME_BEGIN
|
|||
|
|
|
|||
|
|
movq %rsi, %r11;
|
|||
|
|
|
|||
|
|
load_8way(%rdx, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
|
|||
|
|
|
|||
|
|
call __twofish_dec_blk8;
|
|||
|
|
|
|||
|
|
store_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
|
|||
|
|
|
|||
|
|
FRAME_END
|
|||
|
|
ret;
|
|||
|
|
ENDPROC(twofish_ecb_dec_8way)
|
|||
|
|
|
|||
|
|
ENTRY(twofish_cbc_dec_8way)
|
|||
|
|
/* input:
|
|||
|
|
* %rdi: ctx, CTX
|
|||
|
|
* %rsi: dst
|
|||
|
|
* %rdx: src
|
|||
|
|
*/
|
|||
|
|
FRAME_BEGIN
|
|||
|
|
|
|||
|
|
pushq %r12;
|
|||
|
|
|
|||
|
|
movq %rsi, %r11;
|
|||
|
|
movq %rdx, %r12;
|
|||
|
|
|
|||
|
|
load_8way(%rdx, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
|
|||
|
|
|
|||
|
|
call __twofish_dec_blk8;
|
|||
|
|
|
|||
|
|
store_cbc_8way(%r12, %r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
|
|||
|
|
|
|||
|
|
popq %r12;
|
|||
|
|
|
|||
|
|
FRAME_END
|
|||
|
|
ret;
|
|||
|
|
ENDPROC(twofish_cbc_dec_8way)
|
|||
|
|
|
|||
|
|
ENTRY(twofish_ctr_8way)
|
|||
|
|
/* input:
|
|||
|
|
* %rdi: ctx, CTX
|
|||
|
|
* %rsi: dst
|
|||
|
|
* %rdx: src
|
|||
|
|
* %rcx: iv (little endian, 128bit)
|
|||
|
|
*/
|
|||
|
|
FRAME_BEGIN
|
|||
|
|
|
|||
|
|
pushq %r12;
|
|||
|
|
|
|||
|
|
movq %rsi, %r11;
|
|||
|
|
movq %rdx, %r12;
|
|||
|
|
|
|||
|
|
load_ctr_8way(%rcx, .Lbswap128_mask, RA1, RB1, RC1, RD1, RA2, RB2, RC2,
|
|||
|
|
RD2, RX0, RX1, RY0);
|
|||
|
|
|
|||
|
|
call __twofish_enc_blk8;
|
|||
|
|
|
|||
|
|
store_ctr_8way(%r12, %r11, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
|
|||
|
|
|
|||
|
|
popq %r12;
|
|||
|
|
|
|||
|
|
FRAME_END
|
|||
|
|
ret;
|
|||
|
|
ENDPROC(twofish_ctr_8way)
|
|||
|
|
|
|||
|
|
ENTRY(twofish_xts_enc_8way)
|
|||
|
|
/* input:
|
|||
|
|
* %rdi: ctx, CTX
|
|||
|
|
* %rsi: dst
|
|||
|
|
* %rdx: src
|
|||
|
|
* %rcx: iv (t ⊕ αⁿ ∈ GF(2¹²⁸))
|
|||
|
|
*/
|
|||
|
|
FRAME_BEGIN
|
|||
|
|
|
|||
|
|
movq %rsi, %r11;
|
|||
|
|
|
|||
|
|
/* regs <= src, dst <= IVs, regs <= regs xor IVs */
|
|||
|
|
load_xts_8way(%rcx, %rdx, %rsi, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2,
|
|||
|
|
RX0, RX1, RY0, .Lxts_gf128mul_and_shl1_mask);
|
|||
|
|
|
|||
|
|
call __twofish_enc_blk8;
|
|||
|
|
|
|||
|
|
/* dst <= regs xor IVs(in dst) */
|
|||
|
|
store_xts_8way(%r11, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
|
|||
|
|
|
|||
|
|
FRAME_END
|
|||
|
|
ret;
|
|||
|
|
ENDPROC(twofish_xts_enc_8way)
|
|||
|
|
|
|||
|
|
ENTRY(twofish_xts_dec_8way)
|
|||
|
|
/* input:
|
|||
|
|
* %rdi: ctx, CTX
|
|||
|
|
* %rsi: dst
|
|||
|
|
* %rdx: src
|
|||
|
|
* %rcx: iv (t ⊕ αⁿ ∈ GF(2¹²⁸))
|
|||
|
|
*/
|
|||
|
|
FRAME_BEGIN
|
|||
|
|
|
|||
|
|
movq %rsi, %r11;
|
|||
|
|
|
|||
|
|
/* regs <= src, dst <= IVs, regs <= regs xor IVs */
|
|||
|
|
load_xts_8way(%rcx, %rdx, %rsi, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2,
|
|||
|
|
RX0, RX1, RY0, .Lxts_gf128mul_and_shl1_mask);
|
|||
|
|
|
|||
|
|
call __twofish_dec_blk8;
|
|||
|
|
|
|||
|
|
/* dst <= regs xor IVs(in dst) */
|
|||
|
|
store_xts_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
|
|||
|
|
|
|||
|
|
FRAME_END
|
|||
|
|
ret;
|
|||
|
|
ENDPROC(twofish_xts_dec_8way)
|