/* camellia.c */
/*
This file is part of the Crypto-avr-lib/microcrypt-lib.
Copyright (C) 2008 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 .
*/
/**
*
*
*
*
*/
#include
#include
#include
#include "camellia.h"
#include "uart.h"
#include "debug.h"
#include
/*****************************************************************************/
uint64_t camellia_f(uint64_t x, uint64_t k);
/*****************************************************************************/
uint64_t camellia_fl(uint64_t x, uint64_t k);
/*****************************************************************************/
uint64_t camellia_fl_inv(uint64_t y, uint64_t k);
/*****************************************************************************/
void change_endian(void* data, uint8_t length);
/*
uint64_t PROGMEM camellia_sigma[6]={ / * 64 byte table * /
0xA09E667F3BCC908BLL,
0xB67AE8584CAA73B2LL,
0xC6EF372FE94F82BELL,
0x54FF53A5F1D36F1CLL,
0x10E527FADE682D1DLL,
0xB05688C2B3E6C1FDLL
};
*/
uint32_t PROGMEM camellia_sigma[12]={ /* 64 byte table */
0x3BCC908BL, 0xA09E667FL,
0x4CAA73B2L, 0xB67AE858L,
0xE94F82BEL, 0xC6EF372FL,
0xF1D36F1CL, 0x54FF53A5L,
0xDE682D1DL, 0x10E527FAL,
0xB3E6C1FDL, 0xB05688C2L
};
/* an ugly macro to load an entry form the table above */
/*
#define SIGMA(p) (( ((uint64_t)(pgm_read_dword((prog_uint32_t*)camellia_sigma+2*(p)+1)))<<32) | \
((uint64_t)(pgm_read_dword((prog_uint32_t*)camellia_sigma+2*(p)+0))) )
*/
#define SIGMA(p) (( ((uint64_t)(pgm_read_dword(((prog_uint32_t*)camellia_sigma)[2*(p)+1])))<<32) | \
((uint64_t)(pgm_read_dword(((prog_uint32_t*)camellia_sigma)[2*(p)+0]))) )
/*****************************************************************************/
void camellia128_ctx_dump(camellia128_ctx_t *s){
uart_putstr_P(PSTR("\r\n==State Dump=="));
uart_putstr_P(PSTR("\n\rKAl: ")); uart_hexdump(&(s->kal), 8);
uart_putstr_P(PSTR("\n\rKAr: ")); uart_hexdump(&(s->kar), 8);
uart_putstr_P(PSTR("\n\rKLl: ")); uart_hexdump(&(s->kll), 8);
uart_putstr_P(PSTR("\n\rKLr: ")); uart_hexdump(&(s->klr), 8);
return;
}
/*****************************************************************************/
/* extern prog_uint64_t camellia_sigma[6]; */
void camellia128_init(uint8_t* key, camellia128_ctx_t* s){
uint8_t i;
s->kll = 0; /* ((uint64_t*)key)[0]; */
/* load the key, endian-adjusted, to kll,klr */
for(i=0; i<8; ++i){
s->kll <<= 8;
s->kll |= *key++;
}
for(i=0; i<8; ++i){
s->klr <<= 8;
s->klr |= *key++;
}
s->kal = s->kll;
s->kar = s->klr;
s->kar ^= camellia_f(s->kal, SIGMA(0));
s->kal ^= camellia_f(s->kar, SIGMA(1));
s->kal ^= s->kll;
s->kar ^= s->klr;
s->kar ^= camellia_f(s->kal, SIGMA(2));
s->kal ^= camellia_f(s->kar, SIGMA(3));
}
/*****************************************************************************/
void camellia128_keyop(camellia128_ctx_t* s, int8_t q);
/*****************************************************************************/
void camellia128_keyop_inv(camellia128_ctx_t* s, int8_t q);
/*****************************************************************************/
#define SEL_KA 1
#define SEL_KL 0
#define KEY_POSTC1 0x00
#define KEY_POSTC2 0x01
#define KEY_INC2 0x02
#define KEY_DIR 0x04
#define KEY_DIR_NORM 0x00
#define KEY_DIR_INV 0x04
#define KEY_AMMOUNT 0x08
#define KEY_ROL17 0x08
#define KEY_ROL15 0x00
void camellia_6rounds(camellia128_ctx_t* s, uint64_t* bl, uint64_t* br, uint8_t roundop, uint8_t keychoice);
/*****************************************************************************/
void camellia128_enc(void* block, camellia128_ctx_t* s){
#define BL (((uint64_t*)block)[0])
#define BR (((uint64_t*)block)[1])
/* endian adjustment */
/*BL*/
/* 1 2 3 4 5 6 7 8
* 8 7 6 5 4 3 2 1
*/
uint64_t temp64;
change_endian(&BL, 64/8);
change_endian(&BR, 64/8);
/* Prewhitening */
BL ^= s->kll;
BR ^= s->klr;
/* the first 6 */
camellia_6rounds(s, &BL, &BR, KEY_ROL15 | KEY_DIR_NORM | KEY_POSTC1 , 0x33);
/* FL injection */
camellia128_keyop(s, -1);
BL = camellia_fl(BL, s->kal);
BR = camellia_fl_inv(BR, s->kar);
camellia128_keyop(s, -1);
/* middle 6 */
camellia_6rounds(s, &BL, &BR, KEY_ROL15 | KEY_DIR_NORM | KEY_INC2 , 0x34);
/* FL injection */
camellia128_keyop(s, 1);
BL = camellia_fl(BL, s->kll);
BR = camellia_fl_inv(BR, s->klr);
camellia128_keyop(s, 1);
/* last 6 */
camellia_6rounds(s, &BL, &BR, KEY_ROL17 | KEY_DIR_NORM | KEY_POSTC2 , 0x0C);
/* Postwhitening */
BR ^= s->kal;
BL ^= s->kar;
temp64 = BR;
BR = BL;
BL = temp64;
camellia128_keyop(s,1);
change_endian(&BL, 64/8);
change_endian(&BR, 64/8);
#undef BL
#undef BR
}
/*****************************************************************************/
void camellia128_dec(void* block, camellia128_ctx_t* s){
#define BL (((uint64_t*)block)[1])
#define BR (((uint64_t*)block)[0])
/* endian adjustment */
/*BL*/
/* 1 2 3 4 5 6 7 8
* 8 7 6 5 4 3 2 1
*/
uint64_t temp64;
change_endian(&BL, 64/8);
change_endian(&BR, 64/8);
camellia128_keyop_inv(s, 1);
/* Prewhitening */
BR ^= s->kal; /* kw3 */
BL ^= s->kar; /* kw4 */
/* the first 6 */
camellia_6rounds(s, &BR, &BL, KEY_ROL17 | KEY_DIR_INV | KEY_POSTC1 , 0x0C);
/* FL injection */
camellia128_keyop_inv(s, 1);
BR = camellia_fl(BR, s->klr);
BL = camellia_fl_inv(BL, s->kll);
camellia128_keyop_inv(s, 1);
/* middle 6 */
camellia_6rounds(s, &BR, &BL, KEY_ROL15 | KEY_DIR_INV | KEY_INC2 , 0x0B);
/* FL injection */
camellia128_keyop_inv(s, -1);
BR = camellia_fl(BR, s->kar);
BL = camellia_fl_inv(BL, s->kal);
camellia128_keyop_inv(s, -1);
/* last 6 */
camellia_6rounds(s, &BR, &BL, KEY_ROL15 | KEY_DIR_INV | KEY_POSTC2 , 0x33);
/* Postwhitening */
BL ^= s->kll; /* kw1 */
BR ^= s->klr; /* kw2 */
temp64 = BR;
BR = BL;
BL = temp64;
change_endian(&BL, 64/8);
change_endian(&BR, 64/8);
}
/*****************************************************************************/
/*****************************************************************************/
/* EOF */