/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Blowfish Cipher Algorithm (x86_64)
*
* Copyright (C) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
*/
#include <linux/linkage.h>
.file "blowfish-x86_64-asm.S"
.text
/* structure of crypto context */
#define p 0
#define s0 ((16 + 2 ) * 4 )
#define s1 ((16 + 2 + (1 * 256 )) * 4 )
#define s2 ((16 + 2 + (2 * 256 )) * 4 )
#define s3 ((16 + 2 + (3 * 256 )) * 4 )
/* register macros */
#define CTX %r12
#define RIO %rsi
#define RX0 %rax
#define RX1 %rbx
#define RX2 %rcx
#define RX3 %rdx
#define RX0d %eax
#define RX1d %ebx
#define RX2d %ecx
#define RX3d %edx
#define RX0bl %al
#define RX1bl %bl
#define RX2bl %cl
#define RX3bl %dl
#define RX0bh %ah
#define RX1bh %bh
#define RX2bh %ch
#define RX3bh %dh
#define RT0 %rdi
#define RT1 %rsi
#define RT2 %r8
#define RT3 %r9
#define RT0d %edi
#define RT1d %esi
#define RT2d %r8d
#define RT3d %r9d
#define RKEY %r10
/***********************************************************************
* 1-way blowfish
***********************************************************************/
#define F() \
rorq $16 , RX0; \
movzbl RX0bh, RT0d; \
movzbl RX0bl, RT1d; \
rolq $16 , RX0; \
movl s0(CTX,RT0,4 ), RT0d; \
addl s1(CTX,RT1,4 ), RT0d; \
movzbl RX0bh, RT1d; \
movzbl RX0bl, RT2d; \
rolq $32 , RX0; \
xorl s2(CTX,RT1,4 ), RT0d; \
addl s3(CTX,RT2,4 ), RT0d; \
xorq RT0, RX0;
#define add_roundkey_enc(n) \
xorq p+4 *(n)(CTX), RX0;
#define round_enc(n) \
add_roundkey_enc(n); \
\
F(); \
F();
#define add_roundkey_dec(n) \
movq p+4 *(n-1 )(CTX), RT0; \
rorq $32 , RT0; \
xorq RT0, RX0;
#define round_dec(n) \
add_roundkey_dec(n); \
\
F(); \
F(); \
#define read_block() \
movq (RIO), RX0; \
rorq $32 , RX0; \
bswapq RX0;
#define write_block() \
bswapq RX0; \
movq RX0, (RIO);
SYM_FUNC_START(blowfish_enc_blk)
/* input:
* %rdi: ctx
* %rsi: dst
* %rdx: src
*/
movq %r12, %r11;
movq %rdi, CTX;
movq %rsi, %r10;
movq %rdx, RIO;
read_block();
round_enc(0 );
round_enc(2 );
round_enc(4 );
round_enc(6 );
round_enc(8 );
round_enc(10 );
round_enc(12 );
round_enc(14 );
add_roundkey_enc(16 );
movq %r11, %r12;
movq %r10, RIO;
write_block();
RET;
SYM_FUNC_END(blowfish_enc_blk)
SYM_FUNC_START(blowfish_dec_blk)
/* input:
* %rdi: ctx
* %rsi: dst
* %rdx: src
*/
movq %r12, %r11;
movq %rdi, CTX;
movq %rsi, %r10;
movq %rdx, RIO;
read_block();
round_dec(17 );
round_dec(15 );
round_dec(13 );
round_dec(11 );
round_dec(9 );
round_dec(7 );
round_dec(5 );
round_dec(3 );
add_roundkey_dec(1 );
movq %r10, RIO;
write_block();
movq %r11, %r12;
RET;
SYM_FUNC_END(blowfish_dec_blk)
/**********************************************************************
4-way blowfish, four blocks parallel
**********************************************************************/
/* F() for 4-way. Slower when used alone/1-way, but faster when used
* parallel/4-way (tested on AMD Phenom II & Intel Xeon E7330).
*/
#define F4(x) \
movzbl x ## bh, RT1d; \
movzbl x ## bl, RT3d; \
rorq $16 , x; \
movzbl x ## bh, RT0d; \
movzbl x ## bl, RT2d; \
rorq $16 , x; \
movl s0(CTX,RT0,4 ), RT0d; \
addl s1(CTX,RT2,4 ), RT0d; \
xorl s2(CTX,RT1,4 ), RT0d; \
addl s3(CTX,RT3,4 ), RT0d; \
xorq RT0, x;
#define add_preloaded_roundkey4() \
xorq RKEY, RX0; \
xorq RKEY, RX1; \
xorq RKEY, RX2; \
xorq RKEY, RX3;
#define preload_roundkey_enc(n) \
movq p+4 *(n)(CTX), RKEY;
#define add_roundkey_enc4(n) \
add_preloaded_roundkey4(); \
preload_roundkey_enc(n + 2 );
#define round_enc4(n) \
add_roundkey_enc4(n); \
\
F4(RX0); \
F4(RX1); \
F4(RX2); \
F4(RX3); \
\
F4(RX0); \
F4(RX1); \
F4(RX2); \
F4(RX3);
#define preload_roundkey_dec(n) \
movq p+4 *((n)-1 )(CTX), RKEY; \
rorq $32 , RKEY;
#define add_roundkey_dec4(n) \
add_preloaded_roundkey4(); \
preload_roundkey_dec(n - 2 );
#define round_dec4(n) \
add_roundkey_dec4(n); \
\
F4(RX0); \
F4(RX1); \
F4(RX2); \
F4(RX3); \
\
F4(RX0); \
F4(RX1); \
F4(RX2); \
F4(RX3);
#define read_block4() \
movq (RIO), RX0; \
rorq $32 , RX0; \
bswapq RX0; \
\
movq 8 (RIO), RX1; \
rorq $32 , RX1; \
bswapq RX1; \
\
movq 16 (RIO), RX2; \
rorq $32 , RX2; \
bswapq RX2; \
\
movq 24 (RIO), RX3; \
rorq $32 , RX3; \
bswapq RX3;
#define write_block4() \
bswapq RX0; \
movq RX0, (RIO); \
\
bswapq RX1; \
movq RX1, 8 (RIO); \
\
bswapq RX2; \
movq RX2, 16 (RIO); \
\
bswapq RX3; \
movq RX3, 24 (RIO);
#define xor_block4() \
movq (RIO), RT0; \
bswapq RT0; \
xorq RT0, RX1; \
\
movq 8 (RIO), RT2; \
bswapq RT2; \
xorq RT2, RX2; \
\
movq 16 (RIO), RT3; \
bswapq RT3; \
xorq RT3, RX3;
SYM_FUNC_START(blowfish_enc_blk_4way)
/* input:
* %rdi: ctx
* %rsi: dst
* %rdx: src
*/
pushq %r12;
pushq %rbx;
movq %rdi, CTX
movq %rsi, %r11;
movq %rdx, RIO;
preload_roundkey_enc(0 );
read_block4();
round_enc4(0 );
round_enc4(2 );
round_enc4(4 );
round_enc4(6 );
round_enc4(8 );
round_enc4(10 );
round_enc4(12 );
round_enc4(14 );
add_preloaded_roundkey4();
movq %r11, RIO;
write_block4();
popq %rbx;
popq %r12;
RET;
SYM_FUNC_END(blowfish_enc_blk_4way)
SYM_FUNC_START(__blowfish_dec_blk_4way)
/* input:
* %rdi: ctx
* %rsi: dst
* %rdx: src
* %rcx: cbc (bool)
*/
pushq %r12;
pushq %rbx;
pushq %rcx;
pushq %rdx;
movq %rdi, CTX;
movq %rsi, %r11;
movq %rdx, RIO;
preload_roundkey_dec(17 );
read_block4();
round_dec4(17 );
round_dec4(15 );
round_dec4(13 );
round_dec4(11 );
round_dec4(9 );
round_dec4(7 );
round_dec4(5 );
round_dec4(3 );
add_preloaded_roundkey4();
popq RIO;
popq %r12;
testq %r12, %r12;
jz .L_no_cbc_xor;
xor_block4();
.L_no_cbc_xor:
movq %r11, RIO;
write_block4();
popq %rbx;
popq %r12;
RET;
SYM_FUNC_END(__blowfish_dec_blk_4way)
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