tixiv
16 years ago
15 changed files with 345 additions and 11 deletions
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//EEPPROM compatibility support for simulator
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#ifdef AVR |
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#include <avr/eeprom.h> |
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#else |
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#include <stdint.h> |
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void eeprom_write_byte (uint8_t *p, uint8_t value); |
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void eeprom_write_word (uint16_t *p, uint16_t value); |
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uint8_t eeprom_read_byte (const uint8_t *p); |
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uint16_t eeprom_read_word (const uint16_t *p); |
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#define eeprom_busy_wait() |
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#define EEMEM |
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#endif |
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@ -0,0 +1,3 @@ |
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#define sei() |
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#define cli() |
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#include <stdint.h> |
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#include "memxor.h" |
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void memxor(void* dest, const void* src, uint16_t n){ |
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while(n--){ |
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*((uint8_t*)dest) ^= *((uint8_t*)src); |
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dest = (uint8_t*)dest +1; |
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src = (uint8_t*)src +1; |
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} |
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} |
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@ -0,0 +1,199 @@ |
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/* noekeon.c */ |
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/*
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This file is part of the Crypto-avr-lib/microcrypt-lib. |
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Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de) |
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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 3 of the License, or |
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(at your option) any later version. |
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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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You should have received a copy of the GNU General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/ |
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/*
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* author: Daniel Otte |
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* email: daniel.otte@rub.de |
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* license: GPLv3 or later |
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* |
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* |
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* |
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*/ |
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#include <stdint.h> |
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#include <string.h> |
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#ifdef __AVR__ |
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#include <avr/pgmspace.h> |
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#endif |
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#include "noekeon.h" |
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// #include "uart.h"
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#define ROUND_NR 16 |
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#define RC_POS 0 |
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static |
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void gamma(uint32_t* a){ |
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uint32_t tmp; |
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a[1] ^= ~((a[3]) | (a[2])); |
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a[0] ^= a[2] & a[1]; |
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tmp=a[3]; a[3]=a[0]; a[0]=tmp; |
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a[2] ^= a[0] ^ a[1] ^ a[3]; |
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a[1] ^= ~((a[3]) | (a[2])); |
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a[0] ^= a[2] & a[1]; |
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} |
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#define ROTL32(a,n) (((a)<<n)|((a)>>(32-n))) |
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#define ROTR32(a,n) (((a)>>n)|((a)<<(32-n))) |
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static |
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void pi1(uint32_t* a){ |
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a[1] = ROTL32(a[1], 1); |
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a[2] = ROTL32(a[2], 5); |
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a[3] = ROTL32(a[3], 2); |
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} |
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static |
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void pi2(uint32_t* a){ |
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a[1] = ROTR32(a[1], 1); |
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a[2] = ROTR32(a[2], 5); |
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a[3] = ROTR32(a[3], 2); |
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} |
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static |
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void theta(const uint32_t* k, uint32_t* a){ |
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uint32_t temp; |
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temp = a[0] ^ a[2]; temp ^= ROTR32(temp, 8) ^ ROTL32(temp, 8); |
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a[1] ^= temp; |
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a[3] ^= temp; |
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a[0] ^= k[0]; |
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a[1] ^= k[1]; |
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a[2] ^= k[2]; |
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a[3] ^= k[3]; |
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temp = a[1] ^ a[3]; temp ^= ROTR32(temp, 8) ^ ROTL32(temp, 8); |
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a[0] ^= temp; |
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a[2] ^= temp; |
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} |
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static |
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void noekeon_round(uint32_t* key, uint32_t* state, uint8_t const1, uint8_t const2){ |
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((uint8_t*)state)[RC_POS] ^= const1; |
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theta(key, state); |
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((uint8_t*)state)[RC_POS] ^= const2; |
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gamma(state); |
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pi2(state); |
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pi1(state); |
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} |
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uint8_t rc_tab[] |
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#ifdef __AVR__ |
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PROGMEM |
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#endif |
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= { |
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/* 0x80, */ |
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0x1B, 0x36, 0x6C, 0xD8, 0xAB, 0x4D, 0x9A, |
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0x2F, 0x5E, 0xBC, 0x63, 0xC6, 0x97, 0x35, 0x6A, |
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0xD4 |
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}; |
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/* for more rounds
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0xD4, 0xB3, 0x7D, 0xFA, 0xEF, 0xC5, 0x91, 0x39, |
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0x72, 0xE4, 0xD3, 0xBD, 0x61, 0xC2, 0x9F, 0x25, |
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*/ |
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static |
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void changendian32(void* a){ |
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((uint8_t*)a)[0] ^= ((uint8_t*)a)[3]; |
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((uint8_t*)a)[3] ^= ((uint8_t*)a)[0]; |
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((uint8_t*)a)[0] ^= ((uint8_t*)a)[3]; |
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((uint8_t*)a)[1] ^= ((uint8_t*)a)[2]; |
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((uint8_t*)a)[2] ^= ((uint8_t*)a)[1]; |
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((uint8_t*)a)[1] ^= ((uint8_t*)a)[2]; |
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} |
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static |
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void changendian(void* a){ |
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changendian32((uint32_t*)(&(((uint32_t*)a)[0]))); |
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changendian32((uint32_t*)(&(((uint32_t*)a)[1]))); |
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changendian32((uint32_t*)(&(((uint32_t*)a)[2]))); |
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changendian32((uint32_t*)(&(((uint32_t*)a)[3]))); |
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} |
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/******************************************************************************/ |
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void noekeon_enc(void* buffer, const void* key){ |
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uint8_t rc=0x80; |
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uint8_t keyb[16]; |
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int8_t i; |
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memcpy(keyb, key, 16); |
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changendian(buffer); |
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changendian(keyb); |
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for(i=0; i<ROUND_NR; ++i){ |
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noekeon_round((uint32_t*)keyb, (uint32_t*)buffer, rc, 0); |
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#ifdef __AVR__ |
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rc = pgm_read_byte(rc_tab+i); |
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#else |
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rc = rc_tab[i]; |
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#endif |
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} |
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((uint8_t*)buffer)[RC_POS] ^= rc; |
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theta((uint32_t*)keyb, (uint32_t*)buffer); |
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changendian(buffer); |
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} |
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void noekeon_dec(void* buffer, const void* key){ |
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uint8_t rc; |
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int8_t i; |
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uint8_t nullv[16]; |
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uint8_t dkey[16]; |
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changendian(buffer); |
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memset(nullv, 0, 16); |
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memcpy(dkey, key, 16); |
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changendian(dkey); |
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theta((uint32_t*)nullv, (uint32_t*)dkey); |
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// uart_putstr_P(PSTR("\r\nTheta: "));
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// uart_hexdump(dkey, 16);
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for(i=ROUND_NR-1; i>=0; --i){ |
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#ifdef __AVR__ |
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rc = pgm_read_byte(rc_tab+i); |
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#else |
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rc = rc_tab[i]; |
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#endif |
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noekeon_round((uint32_t*)dkey, (uint32_t*)buffer, 0, rc); |
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} |
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theta((uint32_t*)dkey, (uint32_t*)buffer); |
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((uint8_t*)buffer)[RC_POS] ^= 0x80; |
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changendian(buffer); |
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} |
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void noekeon_init(const void* key, noekeon_ctx_t* ctx){ |
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uint8_t nullv[16]; |
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memset(nullv, 0, 16); |
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memcpy(ctx, key, 16); |
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noekeon_enc(ctx, nullv); |
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} |
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@ -0,0 +1,71 @@ |
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//EEPPROM compatibility support for simulator
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#include <stdint.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#define EEPROM_SIZE 1024 |
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static FILE * fp; |
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static uint8_t eemem[EEPROM_SIZE]; |
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static uint8_t inited; |
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static void init(){ |
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if(!inited){ |
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inited = 1; |
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char* filename = ".simulated_eeprom.bin"; |
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size_t size; |
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fp = fopen(filename, "r+"); |
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if(fp == 0){ |
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fp = fopen(filename, "w+"); |
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if(fp == 0){ |
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printf("Failed to open %s\n",filename ); |
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exit (1); |
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} |
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} |
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size = fread (eemem, 1, EEPROM_SIZE, fp); |
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if(size < EEPROM_SIZE){ |
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memset(eemem, 0xff, EEPROM_SIZE); |
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} |
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} |
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} |
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uint16_t conv_addr(uint8_t * p){ |
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uint16_t addr; |
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addr = (unsigned int)p; |
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if(addr >= EEPROM_SIZE){ |
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printf ("warning: eeprom write to %X\n",addr); |
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} |
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addr &= (EEPROM_SIZE-1); |
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return addr; |
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} |
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void eeprom_write_byte (uint8_t *p, uint8_t value){ |
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init(); |
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eemem[conv_addr(p)] = value; |
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fseek(fp, 0, SEEK_SET); |
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fwrite(eemem, 1, EEPROM_SIZE, fp); |
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} |
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void eeprom_write_word (uint16_t *p, uint16_t value){ |
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init(); |
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eemem[conv_addr(p) ] = value & 0xff; |
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eemem[conv_addr(p)+1] = value >> 8; |
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fseek(fp, 0, SEEK_SET); |
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fwrite(eemem, 1, EEPROM_SIZE, fp); |
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fflush(fp); |
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} |
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uint8_t eeprom_read_byte (uint8_t *p){ |
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init(); |
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return eemem[conv_addr(p)]; |
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} |
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uint16_t eeprom_read_word (uint16_t *p){ |
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init(); |
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return eemem[conv_addr(p)] | (eemem[conv_addr(p)+1]<<8); |
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} |
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