+++ /dev/null
-/* camellia_C.c */
-/*
- This file is part of the AVR-Crypto-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 <http://www.gnu.org/licenses/>.
-*/
-/**
- *
- *
- *
- *
- */
-
-#include <stdint.h>
-#include <avr/io.h>
-#include <avr/pgmspace.h>
-#include "camellia.h"
-#if 0
- #include "cli.h"
- #include "debug.h"
- #include <util/delay.h>
-#endif
-/*****************************************************************************/
-
-uint8_t rol(uint8_t a, uint8_t n){return ((a<<n) | (a>>(8-n)));}
-
-/*****************************************************************************/
-
-uint8_t ror(uint8_t a, uint8_t n){return ((a<<(8-n)) | (a>>n));}
-
-/*****************************************************************************/
-
-uint32_t rol32(uint32_t a, uint8_t n){
- return ((a<<n)|(a>>(32-n)));
-}
-
-/*****************************************************************************/
-
-uint64_t rol64(uint64_t a, uint8_t n){
- return ((a<<n)|(a>>(64-n)));
-}
-
-/*****************************************************************************/
-
-uint8_t camellia_s1_table[256] PROGMEM = {
- 112, 130, 44, 236, 179, 39, 192, 229, 228, 133, 87, 53, 234, 12, 174, 65,
- 35, 239, 107, 147, 69, 25, 165, 33, 237, 14, 79, 78, 29, 101, 146, 189,
- 134, 184, 175, 143, 124, 235, 31, 206, 62, 48, 220, 95, 94, 197, 11, 26,
- 166, 225, 57, 202, 213, 71, 93, 61, 217, 1, 90, 214, 81, 86, 108, 77,
- 139, 13, 154, 102, 251, 204, 176, 45, 116, 18, 43, 32, 240, 177, 132, 153,
- 223, 76, 203, 194, 52, 126, 118, 5, 109, 183, 169, 49, 209, 23, 4, 215,
- 20, 88, 58, 97, 222, 27, 17, 28, 50, 15, 156, 22, 83, 24, 242, 34,
- 254, 68, 207, 178, 195, 181, 122, 145, 36, 8, 232, 168, 96, 252, 105, 80,
- 170, 208, 160, 125, 161, 137, 98, 151, 84, 91, 30, 149, 224, 255, 100, 210,
- 16, 196, 0, 72, 163, 247, 117, 219, 138, 3, 230, 218, 9, 63, 221, 148,
- 135, 92, 131, 2, 205, 74, 144, 51, 115, 103, 246, 243, 157, 127, 191, 226,
- 82, 155, 216, 38, 200, 55, 198, 59, 129, 150, 111, 75, 19, 190, 99, 46,
- 233, 121, 167, 140, 159, 110, 188, 142, 41, 245, 249, 182, 47, 253, 180, 89,
- 120, 152, 6, 106, 231, 70, 113, 186, 212, 37, 171, 66, 136, 162, 141, 250,
- 114, 7, 185, 85, 248, 238, 172, 10, 54, 73, 42, 104, 60, 56, 241, 164,
- 64, 40, 211, 123, 187, 201, 67, 193, 21, 227, 173, 244, 119, 199, 128, 158
-};
-
-/*****************************************************************************/
-
-uint8_t camellia_s1(uint8_t b){
- return pgm_read_byte_near(&(camellia_s1_table[b]));
-}
-
-/*****************************************************************************/
-
-uint8_t camellia_s2(uint8_t b){
- return rol(pgm_read_byte_near(&(camellia_s1_table[b])),1);
-}
-
-/*****************************************************************************/
-
-uint8_t camellia_s3(uint8_t b){
- return ror(pgm_read_byte_near(&(camellia_s1_table[b])),1);
-}
-
-/*****************************************************************************/
-
-uint8_t camellia_s4(uint8_t b){
- return pgm_read_byte_near(&(camellia_s1_table[rol(b,1)]));
-}
-
-/*****************************************************************************/
-
-uint64_t camellia_s(uint64_t d){
-// cli_putstr("\n\r S von "); cli_hexdump(&(d), 8);
- #define D ((uint8_t*)(&d))
- D[7] = camellia_s1(D[7]);
- D[6] = camellia_s2(D[6]);
- D[5] = camellia_s3(D[5]);
- D[4] = camellia_s4(D[4]);
-
- D[3] = camellia_s2(D[3]);
- D[2] = camellia_s3(D[2]);
- D[1] = camellia_s4(D[1]);
- D[0] = camellia_s1(D[0]);
- #undef D
-// cli_putstr(" ist "); cli_hexdump(&(d), 8);
- return d;
-}
-
-/*****************************************************************************/
-
-uint64_t camellia_p(uint64_t d){
- uint64_t z=0;
- #define D ((uint8_t*)(&d))
- #define Z ((uint8_t*)(&z))
-/*
- Z[0] = D[4] ^ D[3] ^ D[1];
- Z[1] = D[5] ^ D[0] ^ D[2];
- Z[2] = D[6] ^ D[1] ^ D[3];
- Z[3] = D[7] ^ D[2] ^ D[0];
- Z[4] = D[0] ^ D[6] ^ D[5];
- Z[5] = D[1] ^ D[7] ^ D[6];
- Z[6] = D[2] ^ D[4] ^ D[7];
- Z[7] = D[3] ^ D[5] ^ D[4];
-*/
-// Z[7] = z1 z3 z4 z6 z7 z8
-// cli_putstr("\n\r P von "); cli_hexdump(&(d), 8);
-
- Z[7] = D[7] ^ D[5] ^ D[4] ^ D[2] ^ D[1] ^ D[0];
- Z[6] = D[7] ^ D[6] ^ D[4] ^ D[3] ^ D[1] ^ D[0];
- Z[5] = D[7] ^ D[6] ^ D[5] ^ D[3] ^ D[2] ^ D[0];
- Z[4] = D[6] ^ D[5] ^ D[4] ^ D[3] ^ D[2] ^ D[1] ;
- Z[3] = D[7] ^ D[6] ^ D[2] ^ D[1] ^ D[0];
- Z[2] = D[6] ^ D[5] ^ D[3] ^ D[1] ^ D[0];
- Z[1] = D[5] ^ D[4] ^ D[3] ^ D[2] ^ D[0];
- Z[0] = D[7] ^ D[4] ^ D[3] ^ D[2] ^ D[1] ;
-
-// cli_putstr(" ist "); cli_hexdump(&(z), 8);
-
- #undef Z
- #undef D
- return z;
-}
-
-/*****************************************************************************/
-
-uint64_t camellia_f(uint64_t x, uint64_t k){
- uint64_t y;
- y = camellia_p(camellia_s(x ^ k));
- return y;
-}
-
-/*****************************************************************************/
-
-uint64_t camellia_fl(uint64_t x, uint64_t k){
-// uint64_t lx, lk, y;
- uint32_t lx[2], lk[2], yr, yl;
- lx[0]=(uint32_t)x;
- lx[1]=(uint32_t)(x>>32);
- lk[0]=(uint32_t)k;
- lk[1]=(uint32_t)(k>>32);
- #define Y ((uint32_t*)y)
- #define X ((uint32_t*)lx)
- #define K ((uint32_t*)lk)
-
- yr = rol32((X[1]) & (K[1]) ,1) ^ (X[0]); /* Yr */
- yl = (yr | K[0]) ^ (X[1]); /* Yl */
-
-/*
- cli_putstr("\r\nFL(");
- cli_hexdump(&(x), 8);
- cli_putstr(", ");
- cli_hexdump(&(k), 8);
- cli_putstr(") = ");
- cli_hexdump(y, 8);
-*/
- #undef K
- #undef X
- #undef Y
- return (((uint64_t)yl)<<32 | yr);
-}
-
-/*****************************************************************************/
-
-uint64_t camellia_fl_inv(uint64_t y, uint64_t k){
-//volatile uint32_t xl, xr;
- uint32_t ly[2], lk[2], x[2];
- ly[0]=(uint32_t)y;
- ly[1]=(uint32_t)(y>>32);
- lk[0]=(uint32_t)k;
- lk[1]=(uint32_t)(k>>32);
- #define Y ((uint32_t*)ly)
- #define X ((uint32_t*)x)
- #define K ((uint32_t*)lk)
-
- X[1]=(Y[0] | K[0]) ^ Y[1];
- X[0]=rol32((X[1] & K[1]),1) ^ Y[0];
-
-/*
- cli_putstr("\r\nFL_inv(");
- cli_hexdump(&(y), 8);
- cli_putstr(", ");
- cli_hexdump(&(k), 8);
- cli_putstr(") = ");
-*/
- #undef K
- #undef X
- #undef Y
- return ((uint64_t)(x[1]))<<32 | x[0];
-}
-
-/*****************************************************************************/
-
-uint64_t camellia_sigma[6]={
- 0xA09E667F3BCC908BLL,
- 0xB67AE8584CAA73B2LL,
- 0xC6EF372FE94F82BELL,
- 0x54FF53A5F1D36F1CLL,
- 0x10E527FADE682D1DLL,
- 0xB05688C2B3E6C1FDLL
-};
-
-/*****************************************************************************/
-#if 0
-void camellia128_ctx_dump(camellia128_ctx_t *s){
- cli_putstr("\r\n==State Dump==");
- cli_putstr("\n\rKAl: "); cli_hexdump(&(s->kal), 8);
- cli_putstr("\n\rKAr: "); cli_hexdump(&(s->kar), 8);
- cli_putstr("\n\rKLl: "); cli_hexdump(&(s->kll), 8);
- cli_putstr("\n\rKLr: "); cli_hexdump(&(s->klr), 8);
- return;
-}
-#endif
-/*****************************************************************************/
-
-void camellia128_init(const void* 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 |= *((uint8_t*)key);
- key = (uint8_t*)key+1;
- }
- for(i=0; i<8; ++i){
- s->klr <<= 8;
- s->klr |= *((uint8_t*)key);
- key = (uint8_t*)key+1;
- }
-
- s->kal = s->kll;
- s->kar = s->klr;
-
- s->kar ^= camellia_f(s->kal, camellia_sigma[0]);
- s->kal ^= camellia_f(s->kar, camellia_sigma[1]);
-
- s->kal ^= s->kll;
- s->kar ^= s->klr;
-
- s->kar ^= camellia_f(s->kal, camellia_sigma[2]);
- s->kal ^= camellia_f(s->kar, camellia_sigma[3]);
- /**/
-// cli_putstr("\n\r----------------init finished--------------------");
-}
-
-/*****************************************************************************/
-
-void camellia128_keyop(camellia128_ctx_t* s, int8_t q){
- /* first we do 16 bit left-rols for kl and ka (128bit each) */
- uint32_t temp;
-
- temp = (s->kal)>>(64-16-q);
- s->kal = s->kal<<(16+q) | s->kar>>(64-16-q);
- s->kar = s->kar<<(16+q) | temp;
-
- temp = (s->kll)>>(64-16-q);
- s->kll = s->kll<<(16+q) | s->klr>>(64-16-q);
- s->klr = s->klr<<(16+q) | temp;
- /* after doing the 16-bit rol we have to rol 1 bit left or rigth depending on q */
-}
-
-/*****************************************************************************/
-
-void camellia128_keyop_inv(camellia128_ctx_t* s, int8_t q){
- /* first we do 16 bit right-rols for kl and ka (128bit each) */
- uint32_t temp;
-
- temp = (s->kar)&(0xffffff>>(24-16-q));
- s->kar = s->kar>>(16+q) | s->kal<<(64-16-q);
- s->kal = s->kal>>(16+q) | ((uint64_t)temp)<<(64-16-q);
-
- temp = (s->klr)&(0xffffff>>(24-16-q));
- s->klr = s->klr>>(16+q) | s->kll<<(64-16-q);
- s->kll = s->kll>>(16+q) | ((uint64_t)temp)<<(64-16-q);
- /* after doing the 16-bit rol we have to rol 1 bit left or rigth depending on 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(const camellia128_ctx_t* s, uint64_t* bl, uint64_t* br, uint8_t roundop, uint8_t keychoice){
- uint8_t i;
- uint64_t* k[4];
- k[0] = &(((camellia128_ctx_t*)s)->kll);
- k[1] = &(((camellia128_ctx_t*)s)->klr);
- k[2] = &(((camellia128_ctx_t*)s)->kal);
- k[3] = &(((camellia128_ctx_t*)s)->kar);
- for(i=0; i<3; ++i){ /* each cycle */
- br[0] ^= camellia_f(bl[0],*(k[(keychoice&1)*2+((roundop&KEY_DIR)?1:0)]));
- keychoice >>= 1;
-
- if((i == 1) && (roundop&KEY_INC2)){
- ((roundop&KEY_DIR)?camellia128_keyop_inv:camellia128_keyop)(((camellia128_ctx_t*)s),(roundop&KEY_AMMOUNT)?1:-1);
- }
-
- bl[0] ^= camellia_f(br[0],*(k[(keychoice&1)*2+((roundop&KEY_DIR)?0:1)]));
- keychoice >>= 1;
-
- /* check if we should do some keyop */
- if((i == (roundop&1)) && (!(roundop&KEY_INC2)) ){
- ((roundop&KEY_DIR)?camellia128_keyop_inv:camellia128_keyop)(((camellia128_ctx_t*)s),(roundop&KEY_AMMOUNT)?1:-1);
- /* isn't it fuckin nice what we can do in C?! */
- }
- }
-}
-
-/*****************************************************************************/
-
-void change_endian(void* data, uint8_t length){
- uint8_t i,a;
- for(i=0; i<length/2; ++i){
- a = ((uint8_t*)data)[i];
- ((uint8_t*)data)[i] = ((uint8_t*)data)[length-i-1];
- ((uint8_t*)data)[length-i-1] = a;
- }
-}
-
-/*****************************************************************************/
-
-void camellia128_enc(void* block, const 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((camellia128_ctx_t*)s, -1);
- BL = camellia_fl(BL, s->kal);
- BR = camellia_fl_inv(BR, s->kar);
- camellia128_keyop((camellia128_ctx_t*)s, -1);
- /* middle 6 */
- camellia_6rounds(s, &BL, &BR, KEY_ROL15 | KEY_DIR_NORM | KEY_INC2 , 0x34);
- /* FL injection */
- camellia128_keyop((camellia128_ctx_t*)s, 1);
- BL = camellia_fl(BL, s->kll);
- BR = camellia_fl_inv(BR, s->klr);
- camellia128_keyop((camellia128_ctx_t*)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((camellia128_ctx_t*)s,1);
-
- change_endian(&BL, 64/8);
- change_endian(&BR, 64/8);
-
- #undef BL
- #undef BR
-}
-
-/*****************************************************************************/
-
-void camellia128_dec(void* block, const 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((camellia128_ctx_t*)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((camellia128_ctx_t*)s, 1);
- BR = camellia_fl(BR, s->klr);
- BL = camellia_fl_inv(BL, s->kll);
- camellia128_keyop_inv((camellia128_ctx_t*)s, 1);
- /* middle 6 */
- camellia_6rounds(s, &BR, &BL, KEY_ROL15 | KEY_DIR_INV | KEY_INC2 , 0x0B);
- /* FL injection */
- camellia128_keyop_inv((camellia128_ctx_t*)s, -1);
- BR = camellia_fl(BR, s->kar);
- BL = camellia_fl_inv(BL, s->kal);
- camellia128_keyop_inv((camellia128_ctx_t*)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 */
projects / avr-crypto-lib.git / blobdiff