321 lines
7.1 KiB
ArmAsm
321 lines
7.1 KiB
ArmAsm
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/*
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* Twofish Cipher 3-way parallel algorithm (x86_64)
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*
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* Copyright (C) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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*/
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#include <linux/linkage.h>
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.file "twofish-x86_64-asm-3way.S"
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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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3-way twofish
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**********************************************************************/
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#define CTX %rdi
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#define RIO %rdx
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#define RAB0 %rax
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#define RAB1 %rbx
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#define RAB2 %rcx
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#define RAB0d %eax
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#define RAB1d %ebx
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#define RAB2d %ecx
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#define RAB0bh %ah
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#define RAB1bh %bh
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#define RAB2bh %ch
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#define RAB0bl %al
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#define RAB1bl %bl
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#define RAB2bl %cl
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#define CD0 0x0(%rsp)
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#define CD1 0x8(%rsp)
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#define CD2 0x10(%rsp)
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# used only before/after all rounds
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#define RCD0 %r8
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#define RCD1 %r9
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#define RCD2 %r10
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# used only during rounds
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#define RX0 %r8
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#define RX1 %r9
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#define RX2 %r10
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#define RX0d %r8d
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#define RX1d %r9d
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#define RX2d %r10d
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#define RY0 %r11
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#define RY1 %r12
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#define RY2 %r13
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#define RY0d %r11d
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#define RY1d %r12d
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#define RY2d %r13d
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#define RT0 %rdx
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#define RT1 %rsi
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#define RT0d %edx
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#define RT1d %esi
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#define RT1bl %sil
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#define do16bit_ror(rot, op1, op2, T0, T1, tmp1, tmp2, ab, dst) \
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movzbl ab ## bl, tmp2 ## d; \
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movzbl ab ## bh, tmp1 ## d; \
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rorq $(rot), ab; \
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op1##l T0(CTX, tmp2, 4), dst ## d; \
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op2##l T1(CTX, tmp1, 4), dst ## d;
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#define swap_ab_with_cd(ab, cd, tmp) \
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movq cd, tmp; \
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movq ab, cd; \
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movq tmp, ab;
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/*
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* Combined G1 & G2 function. Reordered with help of rotates to have moves
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* at begining.
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*/
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#define g1g2_3(ab, cd, Tx0, Tx1, Tx2, Tx3, Ty0, Ty1, Ty2, Ty3, x, y) \
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/* G1,1 && G2,1 */ \
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do16bit_ror(32, mov, xor, Tx0, Tx1, RT0, x ## 0, ab ## 0, x ## 0); \
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do16bit_ror(48, mov, xor, Ty1, Ty2, RT0, y ## 0, ab ## 0, y ## 0); \
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\
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do16bit_ror(32, mov, xor, Tx0, Tx1, RT0, x ## 1, ab ## 1, x ## 1); \
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do16bit_ror(48, mov, xor, Ty1, Ty2, RT0, y ## 1, ab ## 1, y ## 1); \
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\
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do16bit_ror(32, mov, xor, Tx0, Tx1, RT0, x ## 2, ab ## 2, x ## 2); \
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do16bit_ror(48, mov, xor, Ty1, Ty2, RT0, y ## 2, ab ## 2, y ## 2); \
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\
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/* G1,2 && G2,2 */ \
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do16bit_ror(32, xor, xor, Tx2, Tx3, RT0, RT1, ab ## 0, x ## 0); \
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do16bit_ror(16, xor, xor, Ty3, Ty0, RT0, RT1, ab ## 0, y ## 0); \
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swap_ab_with_cd(ab ## 0, cd ## 0, RT0); \
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\
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do16bit_ror(32, xor, xor, Tx2, Tx3, RT0, RT1, ab ## 1, x ## 1); \
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do16bit_ror(16, xor, xor, Ty3, Ty0, RT0, RT1, ab ## 1, y ## 1); \
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swap_ab_with_cd(ab ## 1, cd ## 1, RT0); \
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\
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do16bit_ror(32, xor, xor, Tx2, Tx3, RT0, RT1, ab ## 2, x ## 2); \
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do16bit_ror(16, xor, xor, Ty3, Ty0, RT0, RT1, ab ## 2, y ## 2); \
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swap_ab_with_cd(ab ## 2, cd ## 2, RT0);
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#define enc_round_end(ab, x, y, n) \
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addl y ## d, x ## d; \
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addl x ## d, y ## d; \
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addl k+4*(2*(n))(CTX), x ## d; \
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xorl ab ## d, x ## d; \
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addl k+4*(2*(n)+1)(CTX), y ## d; \
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shrq $32, ab; \
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roll $1, ab ## d; \
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xorl y ## d, ab ## d; \
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shlq $32, ab; \
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rorl $1, x ## d; \
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orq x, ab;
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#define dec_round_end(ba, x, y, n) \
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addl y ## d, x ## d; \
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addl x ## d, y ## d; \
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addl k+4*(2*(n))(CTX), x ## d; \
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addl k+4*(2*(n)+1)(CTX), y ## d; \
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xorl ba ## d, y ## d; \
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shrq $32, ba; \
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roll $1, ba ## d; \
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xorl x ## d, ba ## d; \
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shlq $32, ba; \
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rorl $1, y ## d; \
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orq y, ba;
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#define encrypt_round3(ab, cd, n) \
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g1g2_3(ab, cd, s0, s1, s2, s3, s0, s1, s2, s3, RX, RY); \
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\
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enc_round_end(ab ## 0, RX0, RY0, n); \
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enc_round_end(ab ## 1, RX1, RY1, n); \
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enc_round_end(ab ## 2, RX2, RY2, n);
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#define decrypt_round3(ba, dc, n) \
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g1g2_3(ba, dc, s1, s2, s3, s0, s3, s0, s1, s2, RY, RX); \
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\
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dec_round_end(ba ## 0, RX0, RY0, n); \
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dec_round_end(ba ## 1, RX1, RY1, n); \
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dec_round_end(ba ## 2, RX2, RY2, n);
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#define encrypt_cycle3(ab, cd, n) \
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encrypt_round3(ab, cd, n*2); \
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encrypt_round3(ab, cd, (n*2)+1);
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#define decrypt_cycle3(ba, dc, n) \
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decrypt_round3(ba, dc, (n*2)+1); \
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decrypt_round3(ba, dc, (n*2));
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#define push_cd() \
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pushq RCD2; \
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pushq RCD1; \
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pushq RCD0;
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#define pop_cd() \
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popq RCD0; \
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popq RCD1; \
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popq RCD2;
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#define inpack3(in, n, xy, m) \
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movq 4*(n)(in), xy ## 0; \
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xorq w+4*m(CTX), xy ## 0; \
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\
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movq 4*(4+(n))(in), xy ## 1; \
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xorq w+4*m(CTX), xy ## 1; \
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\
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movq 4*(8+(n))(in), xy ## 2; \
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xorq w+4*m(CTX), xy ## 2;
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#define outunpack3(op, out, n, xy, m) \
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xorq w+4*m(CTX), xy ## 0; \
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op ## q xy ## 0, 4*(n)(out); \
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\
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xorq w+4*m(CTX), xy ## 1; \
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op ## q xy ## 1, 4*(4+(n))(out); \
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\
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xorq w+4*m(CTX), xy ## 2; \
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op ## q xy ## 2, 4*(8+(n))(out);
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#define inpack_enc3() \
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inpack3(RIO, 0, RAB, 0); \
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inpack3(RIO, 2, RCD, 2);
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#define outunpack_enc3(op) \
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outunpack3(op, RIO, 2, RAB, 6); \
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outunpack3(op, RIO, 0, RCD, 4);
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#define inpack_dec3() \
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inpack3(RIO, 0, RAB, 4); \
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rorq $32, RAB0; \
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rorq $32, RAB1; \
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rorq $32, RAB2; \
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inpack3(RIO, 2, RCD, 6); \
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rorq $32, RCD0; \
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rorq $32, RCD1; \
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rorq $32, RCD2;
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#define outunpack_dec3() \
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rorq $32, RCD0; \
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rorq $32, RCD1; \
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rorq $32, RCD2; \
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outunpack3(mov, RIO, 0, RCD, 0); \
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rorq $32, RAB0; \
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rorq $32, RAB1; \
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rorq $32, RAB2; \
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outunpack3(mov, RIO, 2, RAB, 2);
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ENTRY(__twofish_enc_blk_3way)
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/* input:
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* %rdi: ctx, CTX
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* %rsi: dst
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* %rdx: src, RIO
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* %rcx: bool, if true: xor output
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*/
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pushq %r13;
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pushq %r12;
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pushq %rbx;
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pushq %rcx; /* bool xor */
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pushq %rsi; /* dst */
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inpack_enc3();
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push_cd();
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encrypt_cycle3(RAB, CD, 0);
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encrypt_cycle3(RAB, CD, 1);
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encrypt_cycle3(RAB, CD, 2);
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encrypt_cycle3(RAB, CD, 3);
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encrypt_cycle3(RAB, CD, 4);
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encrypt_cycle3(RAB, CD, 5);
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encrypt_cycle3(RAB, CD, 6);
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encrypt_cycle3(RAB, CD, 7);
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pop_cd();
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popq RIO; /* dst */
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popq RT1; /* bool xor */
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testb RT1bl, RT1bl;
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jnz .L__enc_xor3;
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outunpack_enc3(mov);
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popq %rbx;
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popq %r12;
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popq %r13;
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ret;
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.L__enc_xor3:
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outunpack_enc3(xor);
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popq %rbx;
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popq %r12;
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popq %r13;
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ret;
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ENDPROC(__twofish_enc_blk_3way)
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ENTRY(twofish_dec_blk_3way)
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/* input:
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* %rdi: ctx, CTX
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* %rsi: dst
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* %rdx: src, RIO
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*/
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pushq %r13;
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pushq %r12;
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pushq %rbx;
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pushq %rsi; /* dst */
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inpack_dec3();
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push_cd();
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decrypt_cycle3(RAB, CD, 7);
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decrypt_cycle3(RAB, CD, 6);
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decrypt_cycle3(RAB, CD, 5);
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decrypt_cycle3(RAB, CD, 4);
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decrypt_cycle3(RAB, CD, 3);
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decrypt_cycle3(RAB, CD, 2);
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decrypt_cycle3(RAB, CD, 1);
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decrypt_cycle3(RAB, CD, 0);
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pop_cd();
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popq RIO; /* dst */
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outunpack_dec3();
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popq %rbx;
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popq %r12;
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popq %r13;
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ret;
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ENDPROC(twofish_dec_blk_3way)
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