3 This file is part of the AVR-Crypto-Lib.
4 Copyright (C) 2010 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/>.
23 #include <avr/pgmspace.h>
36 void keccak_dump_state(uint64_t a[5][5]){
39 cli_putstr_P(PSTR("\r\n"));
41 cli_putstr_P(PSTR(": "));
43 cli_hexdump_rev(&(a[i][j]), 8);
49 void keccak_dump_ctx(keccak_ctx_t* ctx){
50 keccak_dump_state(ctx->a);
51 cli_putstr_P(PSTR("\r\nDBG: r: "));
52 cli_hexdump_rev(&(ctx->r), 2);
53 cli_putstr_P(PSTR("\t c: "));
54 cli_hexdump_rev(&(ctx->c), 2);
55 cli_putstr_P(PSTR("\t d: "));
56 cli_hexdump(&(ctx->d), 1);
57 cli_putstr_P(PSTR("\t bs: "));
58 cli_hexdump(&(ctx->bs), 1);
63 static uint64_t rc[] PROGMEM = {
64 0x0000000000000001LL, 0x0000000000008082LL,
65 0x800000000000808ALL, 0x8000000080008000LL,
66 0x000000000000808BLL, 0x0000000080000001LL,
67 0x8000000080008081LL, 0x8000000000008009LL,
68 0x000000000000008ALL, 0x0000000000000088LL,
69 0x0000000080008009LL, 0x000000008000000ALL,
70 0x000000008000808BLL, 0x800000000000008BLL,
71 0x8000000000008089LL, 0x8000000000008003LL,
72 0x8000000000008002LL, 0x8000000000000080LL,
73 0x000000000000800ALL, 0x800000008000000ALL,
74 0x8000000080008081LL, 0x8000000000008080LL,
75 0x0000000080000001LL, 0x8000000080008008LL
78 uint64_t rotl64(uint64_t a, uint8_t r){
79 return (a<<r)|(a>>(64-r));
82 static uint8_t r[5][5] PROGMEM = {
85 { 62, 6, 43, 15, 61 },
86 { 28, 55, 25, 21, 56 },
90 void keccak_round(uint64_t a[5][5], uint8_t rci){
95 b[i][0] = a[0][i] ^ a[1][i] ^ a[2][i] ^ a[3][i] ^ a[4][i];
98 b[i][1] = b[(4+i)%5][0] ^ rotl64(b[(i+1)%5][0], 1);
106 cli_putstr_P(PSTR("\r\nAfter theta:"));
107 keccak_dump_state(a);
112 b[(2*i+3*j)%5][j] = rotl64(a[j][i], pgm_read_byte(&(r[i][j])));
116 cli_putstr_P(PSTR("\r\n--- after rho & pi ---"));
117 keccak_dump_state(a);
122 a[j][i] = b[j][i] ^ ((~(b[j][(i+1)%5]))&(b[j][(i+2)%5]));
126 cli_putstr_P(PSTR("\r\nAfter chi:"));
127 keccak_dump_state(a);
131 memcpy_P(&t, &(rc[rci]), 8);
134 cli_putstr_P(PSTR("\r\nAfter iota:"));
135 keccak_dump_state(a);
139 void keccak_f1600(uint64_t a[5][5]){
143 cli_putstr_P(PSTR("\r\n\r\n--- Round "));
145 cli_putstr_P(PSTR(" ---"));
151 void keccak_nextBlock(keccak_ctx_t* ctx, const void* block){
152 memxor(ctx->a, block, ctx->bs);
153 keccak_f1600(ctx->a);
156 void keccak_lastBlock(keccak_ctx_t* ctx, const void* block, uint16_t length_b){
157 while(length_b>=ctx->r){
158 keccak_nextBlock(ctx, block);
159 block = (uint8_t*)block + ctx->bs;
162 uint8_t tmp[ctx->bs];
164 memset(tmp, 0x00, ctx->bs);
165 memcpy(tmp, block, (length_b+7)/8);
168 /* we have some single bits */
170 t = tmp[length_b/8]>>(8-(length_b&7));
171 t |= 0x01<<(length_b&7);
174 tmp[length_b/8] = 0x01;
179 if(length_b/8+1+3<=ctx->bs){
180 memcpy(tmp+length_b/8+1, pad, 3);
182 if(length_b/8+1+2<=ctx->bs){
183 memcpy(tmp+length_b/8+1, pad, 2);
184 keccak_nextBlock(ctx, tmp);
185 memset(tmp, 0x00, ctx->bs);
188 if(length_b/8+1+1<=ctx->bs){
189 memcpy(tmp+length_b/8+1, pad, 1);
190 keccak_nextBlock(ctx, tmp);
191 memset(tmp, 0x00, ctx->bs);
195 keccak_nextBlock(ctx, tmp);
196 memset(tmp, 0x00, ctx->bs);
203 keccak_nextBlock(ctx, tmp);
206 void keccak_ctx2hash(void* dest, uint16_t length_b, keccak_ctx_t* ctx){
207 while(length_b>=ctx->r){
208 memcpy(dest, ctx->a, ctx->bs);
209 dest = (uint8_t*)dest + ctx->bs;
211 keccak_f1600(ctx->a);
213 memcpy(dest, ctx->a, (length_b+7)/8);
216 void keccak224_ctx2hash(void* dest, keccak_ctx_t* ctx){
217 keccak_ctx2hash(dest, 224, ctx);
220 void keccak256_ctx2hash(void* dest, keccak_ctx_t* ctx){
221 keccak_ctx2hash(dest, 256, ctx);
224 void keccak384_ctx2hash(void* dest, keccak_ctx_t* ctx){
225 keccak_ctx2hash(dest, 384, ctx);
228 void keccak512_ctx2hash(void* dest, keccak_ctx_t* ctx){
229 keccak_ctx2hash(dest, 512, ctx);
233 1. SHA3-224: ⌊Keccak[r = 1152, c = 448, d = 28]⌋224
234 2. SHA3-256: ⌊Keccak[r = 1088, c = 512, d = 32]⌋256
235 3. SHA3-384: ⌊Keccak[r = 832, c = 768, d = 48]⌋384
236 4. SHA3-512: ⌊Keccak[r = 576, c = 1024, d = 64]⌋512
238 void keccak_init(uint16_t r, uint16_t c, uint8_t d, keccak_ctx_t* ctx){
239 memset(ctx->a, 0x00, 5*5*8);
243 ctx->bs = (uint8_t)(r/8);
246 void keccak224_init(keccak_ctx_t* ctx){
247 keccak_init(1152, 448, 28, ctx);
250 void keccak256_init(keccak_ctx_t* ctx){
251 keccak_init(1088, 512, 32, ctx);
254 void keccak384_init(keccak_ctx_t* ctx){
255 keccak_init( 832, 768, 48, ctx);
258 void keccak512_init(keccak_ctx_t* ctx){
259 keccak_init( 576, 1024, 64, ctx);