3 This file is part of the AVR-Crypto-Lib.
4 Copyright (C) 2009 Daniel Otte (daniel.otte@rub.de)
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 * \file groestl_small.c
22 * \email daniel.otte@rub.de
24 * \license GPLv3 or later
28 #include "groestl_small.h"
33 #include <avr/pgmspace.h>
43 void dump_m(const uint8_t* m){
46 cli_putstr_P(PSTR("\r\n"));
49 cli_hexdump(m+8*i+j, 1);
57 static const uint8_t matrix[] PROGMEM = {
58 2, 2, 3, 4, 5, 3, 5, 7,
59 7, 2, 2, 3, 4, 5, 3, 5,
60 5, 7, 2, 2, 3, 4, 5, 3,
61 3, 5, 7, 2, 2, 3, 4, 5,
62 5, 3, 5, 7, 2, 2, 3, 4,
63 4, 5, 3, 5, 7, 2, 2, 3,
64 3, 4, 5, 3, 5, 7, 2, 2,
65 2, 3, 4, 5, 3, 5, 7, 2
69 static const uint8_t p_shifts[] PROGMEM = {
70 0, 1, 2, 3, 4, 5, 6, 7
73 static const uint8_t q_shifts[] PROGMEM = {
74 1, 3, 5, 7, 0, 2, 4, 6
79 void shift_columns(uint8_t *a, PGM_VOID_P shifts){
84 s = pgm_read_byte(shifts);
85 shifts = (uint8_t*)shifts + 1;
93 a[i+((j-s+8)%8)*8] = tmp[j];
100 void groestl_small_rounds(uint8_t *m, uint8_t q){
104 cli_putstr_P(PSTR("\r\n:: BEGIN "));
108 for(r=0; r<ROUNDS; ++r){
110 for(i=0; i<8*8; ++i){
114 m[7+i*8] ^= r ^ (i<<4);
118 m[i*8] ^= r ^ (i<<4);
123 cli_putstr_P(PSTR("\r\npost add-const"));
128 m[i] = pgm_read_byte(aes_sbox+m[i]);
131 shift_columns(m, p_shifts);
133 shift_columns(m, q_shifts);
137 cli_putstr_P(PSTR("\r\npost shift-bytes"));
142 memcpy(tmp, m+8*i, 8);
144 m[j+i*8] = gf256mul(pgm_read_byte(matrix+8*j+0),tmp[0], POLYNOM)
145 ^ gf256mul(pgm_read_byte(matrix+8*j+1),tmp[1], POLYNOM)
146 ^ gf256mul(pgm_read_byte(matrix+8*j+2),tmp[2], POLYNOM)
147 ^ gf256mul(pgm_read_byte(matrix+8*j+3),tmp[3], POLYNOM)
148 ^ gf256mul(pgm_read_byte(matrix+8*j+4),tmp[4], POLYNOM)
149 ^ gf256mul(pgm_read_byte(matrix+8*j+5),tmp[5], POLYNOM)
150 ^ gf256mul(pgm_read_byte(matrix+8*j+6),tmp[6], POLYNOM)
151 ^ gf256mul(pgm_read_byte(matrix+8*j+7),tmp[7], POLYNOM);
156 cli_putstr_P(PSTR("\r\npost mix-bytes"));
163 void groestl224_init(groestl224_ctx_t* ctx){
164 memset(ctx->h, 0, 8*8);
169 void groestl256_init(groestl256_ctx_t* ctx){
170 memset(ctx->h, 0, 8*8);
175 void groestl_small_nextBlock(groestl_small_ctx_t* ctx, const void* block){
176 uint8_t tmp1[64], tmp2[64];
177 /* for(i=0; i<8; ++i){
179 tmp1[j*8+i] = ((uint8_t*)block)[i*8+j];
183 memcpy(tmp1, block, 64);
184 memcpy(tmp2, tmp1, 64);
185 memxor(tmp1, ctx->h, 64);
186 groestl_small_rounds(tmp1, 0);
187 groestl_small_rounds(tmp2, 1);
188 memxor(ctx->h, tmp1, 64);
189 memxor(ctx->h, tmp2, 64);
193 void groestl_small_lastBlock(groestl_small_ctx_t* ctx, const void* block, uint16_t length_b){
195 while(length_b>=GROESTL_SMALL_BLOCKSIZE){
196 groestl_small_nextBlock(ctx, block);
197 length_b -= GROESTL_SMALL_BLOCKSIZE;
198 block = (uint8_t*)block + GROESTL_SMALL_BLOCKSIZE_B;
200 memset(buffer, 0, 64);
201 memcpy(buffer, block, (length_b+7)/8);
202 buffer[length_b/8] |= 0x80>>(length_b&0x7);
204 groestl_small_nextBlock(ctx, buffer);
205 memset(buffer, 0, 64-4);
208 buffer[64-1] = (uint8_t)(ctx->counter);
209 buffer[64-2] = (uint8_t)((ctx->counter)>>8);
210 buffer[64-3] = (uint8_t)((ctx->counter)>>16);
211 buffer[64-4] = (uint8_t)((ctx->counter)>>24);
212 groestl_small_nextBlock(ctx, buffer);
215 void groestl_small_ctx2hash(void* dest, const groestl_small_ctx_t* ctx, uint16_t outlength_b){
217 memcpy(tmp, ctx->h, 64);
218 groestl_small_rounds(tmp, 0);
219 memxor(tmp, ctx->h, 64);
221 cli_putstr_P(PSTR("\r\npost finalisation"));
224 memcpy(dest, tmp+64-outlength_b/8, outlength_b/8);
227 void groestl224_ctx2hash(void* dest, const groestl224_ctx_t* ctx){
228 groestl_small_ctx2hash(dest, ctx, 224);
231 void groestl256_ctx2hash(void* dest, const groestl256_ctx_t* ctx){
232 groestl_small_ctx2hash(dest, ctx, 256);
235 void groestl224_nextBlock(groestl224_ctx_t* ctx, const void* block){
236 groestl_small_nextBlock(ctx, block);
239 void groestl256_nextBlock(groestl256_ctx_t* ctx, const void* block){
240 groestl_small_nextBlock(ctx, block);
243 void groestl224_lastBlock(groestl224_ctx_t* ctx, const void* block, uint16_t length_b){
244 groestl_small_lastBlock(ctx, block, length_b);
247 void groestl256_lastBlock(groestl256_ctx_t* ctx, const void* block, uint16_t length_b){
248 groestl_small_lastBlock(ctx, block, length_b);
251 void groestl224(void* dest, const void* msg, uint32_t length_b){
252 groestl_small_ctx_t ctx;
253 groestl224_init(&ctx);
254 while(length_b>=GROESTL_SMALL_BLOCKSIZE){
255 groestl_small_nextBlock(&ctx, msg);
256 length_b -= GROESTL_SMALL_BLOCKSIZE;
257 msg = (uint8_t*)msg + GROESTL_SMALL_BLOCKSIZE_B;
259 groestl_small_lastBlock(&ctx, msg, length_b);
260 groestl_small_ctx2hash(dest, &ctx, 224);
263 void groestl256(void* dest, const void* msg, uint32_t length_b){
264 groestl_small_ctx_t ctx;
265 groestl256_init(&ctx);
266 while(length_b>=GROESTL_SMALL_BLOCKSIZE){
267 groestl_small_nextBlock(&ctx, msg);
268 length_b -= GROESTL_SMALL_BLOCKSIZE;
269 msg = (uint8_t*)msg + GROESTL_SMALL_BLOCKSIZE_B;
271 groestl_small_lastBlock(&ctx, msg, length_b);
272 groestl_small_ctx2hash(dest, &ctx, 256);