331 lines
6.0 KiB
ArmAsm
331 lines
6.0 KiB
ArmAsm
/* threefish512_enc_asm.S */
|
|
/*
|
|
This file is part of the AVR-Crypto-Lib.
|
|
Copyright (C) 2009 Daniel Otte (daniel.otte@rub.de)
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/*
|
|
* \author Daniel Otte
|
|
* \email daniel.otte@rub.de
|
|
* \date 2009-03-24
|
|
* \license GPLv3 or later
|
|
*/
|
|
|
|
#include "avr-asm-macros.S"
|
|
|
|
/******************************************************************************/
|
|
/*
|
|
#define X(a) (((uint64_t*)data)[(a)])
|
|
|
|
|
|
static
|
|
void permute_inv8(void* data){
|
|
uint64_t t;
|
|
t = X(6);
|
|
X(6) = X(4);
|
|
X(4) = X(2);
|
|
X(2) = X(0);
|
|
X(0) = t;
|
|
t = X(7);
|
|
X(7) = X(3);
|
|
X(3) = t;
|
|
}
|
|
|
|
static
|
|
void add_key_8(void* data, const threefish512_ctx_t* ctx, uint8_t s){
|
|
uint8_t i;
|
|
for(i=0; i<5; ++i){
|
|
X(i) -= ctx->k[(s+i)%9];
|
|
}
|
|
X(5) -= ctx->k[(s+5)%9] + ctx->t[s%3];
|
|
X(6) -= ctx->k[(s+6)%9] + ctx->t[(s+1)%3];
|
|
X(7) -= ctx->k[(s+7)%9] + s;
|
|
}
|
|
|
|
void threefish512_dec(void* data, const threefish512_ctx_t* ctx){
|
|
uint8_t i=0,s=18;
|
|
uint8_t r0[8] = {0x41, 0x4b, 0x59, 0x41, 0x32, 0x42, 0x60, 0x5a};
|
|
uint8_t r1[8] = {0x63, 0x32, 0x33, 0x61, 0x14, 0x2a, 0x24, 0x4a};
|
|
uint8_t r2[8] = {0x59, 0x13, 0x51, 0x10, 0x72, 0x29, 0x53, 0x62};
|
|
uint8_t r3[8] = {0x43, 0x11, 0x2a, 0x52, 0x19, 0x33, 0x49, 0x7b};
|
|
do{
|
|
if(i%4==0){
|
|
add_key_8(data, ctx, s);
|
|
--s;
|
|
}
|
|
permute_inv8(data);
|
|
threefish_invmix((uint8_t*)data + 0, r0[i%8]);
|
|
threefish_invmix((uint8_t*)data + 16, r1[i%8]);
|
|
threefish_invmix((uint8_t*)data + 32, r2[i%8]);
|
|
threefish_invmix((uint8_t*)data + 48, r3[i%8]);
|
|
++i;
|
|
}while(i!=72);
|
|
add_key_8(data, ctx, s);
|
|
}
|
|
*/
|
|
I = 2
|
|
S = 3
|
|
DATA0 = 4
|
|
DATA1 = 5
|
|
CTX0 = 6
|
|
CTX1 = 7
|
|
IDX0 = 8
|
|
IDX1 = 9
|
|
IDX2 = 10
|
|
IDX3 = 11
|
|
IDX4 = 12
|
|
IDX5 = 13
|
|
IDX6 = 14
|
|
IDX7 = 15
|
|
/*
|
|
* param data: r24:r25
|
|
* param ctx: r22:r23
|
|
*/
|
|
.global threefish512_dec
|
|
threefish512_dec:
|
|
push r28
|
|
push r29
|
|
push_range 2, 17
|
|
movw DATA0, r24
|
|
movw CTX0, r22
|
|
clr I
|
|
ldi r26, 18
|
|
mov S, r26
|
|
1:
|
|
mov r30, I
|
|
andi r30, 0x03
|
|
breq 2f
|
|
rjmp 4f
|
|
2:
|
|
ldi r30, lo8(threefish512_slut9)
|
|
ldi r31, hi8(threefish512_slut9)
|
|
add r30, S
|
|
adc r31, r1
|
|
lpm IDX0, Z+
|
|
lpm IDX1, Z+
|
|
lpm IDX2, Z+
|
|
lpm IDX3, Z+
|
|
lpm IDX4, Z+
|
|
lpm IDX5, Z+
|
|
lpm IDX6, Z+
|
|
lpm IDX7, Z
|
|
movw r30, CTX0
|
|
movw r26, DATA0
|
|
add r30, IDX0
|
|
adc r31, r1
|
|
rcall sub_z_from_x8
|
|
movw r30, CTX0
|
|
add r30, IDX1
|
|
adc r31, r1
|
|
rcall sub_z_from_x8
|
|
movw r30, CTX0
|
|
add r30, IDX2
|
|
adc r31, r1
|
|
rcall sub_z_from_x8
|
|
movw r30, CTX0
|
|
add r30, IDX3
|
|
adc r31, r1
|
|
rcall sub_z_from_x8
|
|
movw r30, CTX0
|
|
add r30, IDX4
|
|
adc r31, r1
|
|
rcall sub_z_from_x8
|
|
movw r30, CTX0
|
|
add r30, IDX5
|
|
adc r31, r1
|
|
rcall sub_z_from_x8
|
|
movw r30, CTX0
|
|
add r30, IDX6
|
|
adc r31, r1
|
|
rcall sub_z_from_x8
|
|
movw r30, CTX0
|
|
add r30, IDX7
|
|
adc r31, r1
|
|
rcall sub_z_from_x8
|
|
|
|
/* now the remaining key */
|
|
sbiw r26, 3*8
|
|
ldi r30, lo8(threefish512_slut3)
|
|
ldi r31, hi8(threefish512_slut3)
|
|
add r30, S
|
|
adc r31, r1
|
|
lpm IDX0, Z+
|
|
lpm IDX1, Z
|
|
movw r30, CTX0
|
|
adiw r30, 7*8 /* make Z pointing to (extended tweak) */
|
|
adiw r30, 2*8
|
|
movw IDX2, r30
|
|
add r30, IDX0
|
|
adc r31, r1
|
|
rcall sub_z_from_x8
|
|
movw r30, IDX2
|
|
add r30, IDX1
|
|
adc r31, r1
|
|
rcall sub_z_from_x8
|
|
ld r0, X
|
|
sub r0, S
|
|
st X+, r0
|
|
ld r0, X
|
|
sbc r0, r1
|
|
st X+, r0
|
|
ld r0, X
|
|
sbc r0, r1
|
|
st X+, r0
|
|
ld r0, X
|
|
sbc r0, r1
|
|
st X+, r0
|
|
ld r0, X
|
|
sbc r0, r1
|
|
st X+, r0
|
|
ld r0, X
|
|
sbc r0, r1
|
|
st X+, r0
|
|
ld r0, X
|
|
sbc r0, r1
|
|
st X+, r0
|
|
ld r0, X
|
|
sbc r0, r1
|
|
st X+, r0
|
|
tst S
|
|
brne 3f
|
|
exit:
|
|
pop_range 2, 17
|
|
pop r29
|
|
pop r28
|
|
ret
|
|
3:
|
|
dec S
|
|
4:
|
|
/* now the permutation */
|
|
movw r26, DATA0
|
|
movw r30, DATA0
|
|
adiw r30, 6*8
|
|
rcall xchg_zx8
|
|
movw r26, DATA0
|
|
adiw r26, 6*8
|
|
movw r30, DATA0
|
|
adiw r30, 4*8
|
|
rcall xchg_zx8
|
|
movw r26, DATA0
|
|
adiw r26, 2*8
|
|
movw r30, DATA0
|
|
adiw r30, 4*8
|
|
rcall xchg_zx8
|
|
movw r26, DATA0
|
|
adiw r26, 3*8
|
|
movw r30, DATA0
|
|
adiw r30, 7*8
|
|
rcall xchg_zx8
|
|
/* call mix */
|
|
ldi r30, lo8(threefish512_rc0)
|
|
ldi r31, hi8(threefish512_rc0)
|
|
mov r26, I
|
|
andi r26, 0x07
|
|
add r30, r26
|
|
adc r31, r1
|
|
lpm r22, Z
|
|
adiw r30, 8
|
|
lpm IDX0, Z
|
|
adiw r30, 8
|
|
lpm IDX1, Z
|
|
push IDX1
|
|
adiw r30, 8
|
|
lpm IDX1, Z
|
|
|
|
movw r24, DATA0
|
|
call threefish_invmix_asm /* no rcall? */
|
|
movw r24, DATA0
|
|
adiw r24, 16
|
|
mov r22, IDX0
|
|
call threefish_invmix_asm /* no rcall? */
|
|
movw r24, DATA0
|
|
adiw r24, 32
|
|
pop r22
|
|
;mov r22, IDX0
|
|
call threefish_invmix_asm /* no rcall? */
|
|
movw r24, DATA0
|
|
adiw r24, 48
|
|
mov r22, IDX1
|
|
call threefish_invmix_asm /* no rcall? */
|
|
inc I
|
|
rjmp 1b
|
|
|
|
threefish512_slut9:
|
|
.byte 0x00, 0x08, 0x10, 0x18, 0x20, 0x28, 0x30, 0x38
|
|
.byte 0x40, 0x00, 0x08, 0x10, 0x18, 0x20, 0x28, 0x30
|
|
.byte 0x38, 0x40, 0x00, 0x08, 0x10, 0x18, 0x20, 0x28
|
|
.byte 0x30, 0x38, 0x40
|
|
threefish512_slut3:
|
|
.byte 0x00, 0x08, 0x10, 0x00, 0x08, 0x10, 0x00, 0x08
|
|
.byte 0x10, 0x00, 0x08, 0x10, 0x00, 0x08, 0x10, 0x00
|
|
.byte 0x08, 0x10, 0x00, 0x08, 0x10, 0x00, 0x08
|
|
|
|
threefish512_rc0: .byte 0x41, 0x4b, 0x59, 0x41, 0x32, 0x42, 0x60, 0x5a
|
|
threefish512_rc1: .byte 0x63, 0x32, 0x33, 0x61, 0x14, 0x2a, 0x24, 0x4a
|
|
threefish512_rc2: .byte 0x59, 0x13, 0x51, 0x10, 0x72, 0x29, 0x53, 0x62
|
|
threefish512_rc3: .byte 0x43, 0x11, 0x2a, 0x52, 0x19, 0x33, 0x49, 0x7b
|
|
|
|
sub_z_from_x8:
|
|
ld r0, Z+
|
|
ld r1, X
|
|
sub r1, r0
|
|
st X+, r1
|
|
ld r0, Z+
|
|
ld r1, X
|
|
sbc r1, r0
|
|
st X+, r1
|
|
ld r0, Z+
|
|
ld r1, X
|
|
sbc r1, r0
|
|
st X+, r1
|
|
ld r0, Z+
|
|
ld r1, X
|
|
sbc r1, r0
|
|
st X+, r1
|
|
ld r0, Z+
|
|
ld r1, X
|
|
sbc r1, r0
|
|
st X+, r1
|
|
ld r0, Z+
|
|
ld r1, X
|
|
sbc r1, r0
|
|
st X+, r1
|
|
ld r0, Z+
|
|
ld r1, X
|
|
sbc r1, r0
|
|
st X+, r1
|
|
ld r0, Z+
|
|
ld r1, X
|
|
sbc r1, r0
|
|
st X+, r1
|
|
clr r1
|
|
ret
|
|
|
|
T0 = IDX0
|
|
T1 = 0
|
|
CNT = 24
|
|
xchg_zx8:
|
|
ldi CNT, 8
|
|
1: ld T0, X
|
|
ld T1, Z
|
|
st X+, T1
|
|
st Z+, T0
|
|
dec CNT
|
|
brne 1b
|
|
ret
|
|
|
|
|
|
|