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>
38 void keccak_dump_state(uint64_t a[5][5]){
41 cli_putstr_P(PSTR("\r\n"));
43 cli_putstr_P(PSTR(": "));
45 cli_hexdump_rev(&(a[i][j]), 8);
51 void keccak_dump_ctx(keccak_ctx_t* ctx){
52 keccak_dump_state(ctx->a);
53 cli_putstr_P(PSTR("\r\nDBG: r: "));
54 cli_hexdump_rev(&(ctx->r), 2);
55 cli_putstr_P(PSTR("\t c: "));
56 cli_hexdump_rev(&(ctx->c), 2);
57 cli_putstr_P(PSTR("\t d: "));
58 cli_hexdump(&(ctx->d), 1);
59 cli_putstr_P(PSTR("\t bs: "));
60 cli_hexdump(&(ctx->bs), 1);
66 const uint64_t rc[] PROGMEM = {
67 0x0000000000000001LL, 0x0000000000008082LL,
68 0x800000000000808ALL, 0x8000000080008000LL,
69 0x000000000000808BLL, 0x0000000080000001LL,
70 0x8000000080008081LL, 0x8000000000008009LL,
71 0x000000000000008ALL, 0x0000000000000088LL,
72 0x0000000080008009LL, 0x000000008000000ALL,
73 0x000000008000808BLL, 0x800000000000008BLL,
74 0x8000000000008089LL, 0x8000000000008003LL,
75 0x8000000000008002LL, 0x8000000000000080LL,
76 0x000000000000800ALL, 0x800000008000000ALL,
77 0x8000000080008081LL, 0x8000000000008080LL,
78 0x0000000080000001LL, 0x8000000080008008LL
82 const static uint8_t rc_comp[] PROGMEM = {
83 0x01, 0x92, 0xda, 0x70,
84 0x9b, 0x21, 0xf1, 0x59,
85 0x8a, 0x88, 0x39, 0x2a,
86 0xbb, 0xcb, 0xd9, 0x53,
87 0x52, 0xc0, 0x1a, 0x6a,
88 0xf1, 0xd0, 0x21, 0x78,
91 const static uint8_t r[5][5] PROGMEM = {
92 { ROT_CODE( 0), ROT_CODE(36), ROT_CODE( 3), ROT_CODE(41), ROT_CODE(18) },
93 { ROT_CODE( 1), ROT_CODE(44), ROT_CODE(10), ROT_CODE(45), ROT_CODE( 2) },
94 { ROT_CODE(62), ROT_CODE( 6), ROT_CODE(43), ROT_CODE(15), ROT_CODE(61) },
95 { ROT_CODE(28), ROT_CODE(55), ROT_CODE(25), ROT_CODE(21), ROT_CODE(56) },
96 { ROT_CODE(27), ROT_CODE(20), ROT_CODE(39), ROT_CODE( 8), ROT_CODE(14) }
99 void keccak_theta(uint64_t *a, uint64_t *b);
102 void keccak_round(uint64_t a[5][5], uint8_t rci){
111 printf_P(PSTR("\npre-theta(1):"));
112 keccak_dump_state(b);
114 keccak_theta((uint64_t*)a, (uint64_t*)b);
116 printf_P(PSTR("\npost-theta(1):"));
117 keccak_dump_state(b);
119 for(i = 0; i < 5; ++i){
120 for(j = 0; j < 5; ++j){
121 a[j][i] ^= rotate64_1bit_left(b[(i + 1) % 5][0]);
125 cli_putstr_P(PSTR("\r\nAfter theta:"));
126 keccak_dump_state(a);
129 for(i = 0; i < 5; ++i){
130 for(j = 0; j < 5; ++j){
131 b[(2 * i + 3 * j) % 5][j] = rotate64left_code(a[j][i], pgm_read_byte(&(r[i][j])));
135 cli_putstr_P(PSTR("\r\n--- after rho & pi ---"));
136 keccak_dump_state(a);
139 for(i = 0; i < 5; ++i){
140 for(j = 0; j < 5; ++j){
141 a[j][i] = b[j][i] ^ ((~(b[j][(i + 1) % 5])) & (b[j][(i + 2) % 5]));
145 cli_putstr_P(PSTR("\r\nAfter chi:"));
146 keccak_dump_state(a);
150 // memcpy_P(&t, &(rc_comp[rci]), 8);
152 t.v8[0] = pgm_read_byte(&(rc_comp[rci]));
166 cli_putstr_P(PSTR("\r\nAfter iota:"));
167 keccak_dump_state(a);
171 void keccak_f1600(uint64_t a[5][5]){
175 cli_putstr_P(PSTR("\r\n\r\n--- Round "));
177 cli_putstr_P(PSTR(" ---"));
183 void keccak_nextBlock(keccak_ctx_t* ctx, const void* block){
184 memxor(ctx->a, block, ctx->bs);
185 keccak_f1600(ctx->a);
188 void keccak_lastBlock(keccak_ctx_t* ctx, const void* block, uint16_t length_b){
189 while(length_b>=ctx->r){
190 keccak_nextBlock(ctx, block);
191 block = (uint8_t*)block + ctx->bs;
194 uint8_t tmp[ctx->bs];
196 memset(tmp, 0x00, ctx->bs);
197 memcpy(tmp, block, (length_b+7)/8);
200 /* we have some single bits */
202 t = tmp[length_b / 8] >> (8 - (length_b & 7));
203 t |= 0x01 << (length_b & 7);
204 tmp[length_b / 8] = t;
206 tmp[length_b / 8] = 0x01;
211 if(length_b / 8 + 1 + 3 <= ctx->bs){
212 memcpy(tmp + length_b / 8 + 1, pad, 3);
214 if(length_b / 8 + 1 + 2 <= ctx->bs){
215 memcpy(tmp+length_b/8+1, pad, 2);
216 keccak_nextBlock(ctx, tmp);
217 memset(tmp, 0x00, ctx->bs);
220 if(length_b/8+1+1 <= ctx->bs){
221 memcpy(tmp + length_b / 8 + 1, pad, 1);
222 keccak_nextBlock(ctx, tmp);
223 memset(tmp, 0x00, ctx->bs);
227 keccak_nextBlock(ctx, tmp);
228 memset(tmp, 0x00, ctx->bs);
235 keccak_nextBlock(ctx, tmp);
238 void keccak_ctx2hash(void* dest, uint16_t length_b, keccak_ctx_t* ctx){
239 while(length_b>=ctx->r){
240 memcpy(dest, ctx->a, ctx->bs);
241 dest = (uint8_t*)dest + ctx->bs;
243 keccak_f1600(ctx->a);
245 memcpy(dest, ctx->a, (length_b+7)/8);
248 void keccak224_ctx2hash(void* dest, keccak_ctx_t* ctx){
249 keccak_ctx2hash(dest, 224, ctx);
252 void keccak256_ctx2hash(void* dest, keccak_ctx_t* ctx){
253 keccak_ctx2hash(dest, 256, ctx);
256 void keccak384_ctx2hash(void* dest, keccak_ctx_t* ctx){
257 keccak_ctx2hash(dest, 384, ctx);
260 void keccak512_ctx2hash(void* dest, keccak_ctx_t* ctx){
261 keccak_ctx2hash(dest, 512, ctx);
265 1. SHA3-224: ⌊Keccak[r = 1152, c = 448, d = 28]⌋224
266 2. SHA3-256: ⌊Keccak[r = 1088, c = 512, d = 32]⌋256
267 3. SHA3-384: ⌊Keccak[r = 832, c = 768, d = 48]⌋384
268 4. SHA3-512: ⌊Keccak[r = 576, c = 1024, d = 64]⌋512
270 void keccak_init(uint16_t r, uint16_t c, uint8_t d, keccak_ctx_t* ctx){
271 memset(ctx->a, 0x00, 5 * 5 * 8);
275 ctx->bs = (uint8_t)(r / 8);
278 void keccak224_init(keccak_ctx_t* ctx){
279 keccak_init(1152, 448, 28, ctx);
282 void keccak256_init(keccak_ctx_t* ctx){
283 keccak_init(1088, 512, 32, ctx);
286 void keccak384_init(keccak_ctx_t* ctx){
287 keccak_init( 832, 768, 48, ctx);
290 void keccak512_init(keccak_ctx_t* ctx){
291 keccak_init( 576, 1024, 64, ctx);