3 This file is part of the ARM-Crypto-Lib.
4 Copyright (C) 2006-2010 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/>.
35 void keccak_dump_state(uint64_t a[5][5]){
42 cli_hexdump_rev(&(a[i][j]), 8);
48 void keccak_dump_ctx(keccak_ctx_t* ctx){
49 keccak_dump_state(ctx->a);
50 cli_putstr("\r\nDBG: r: ");
51 cli_hexdump_rev(&(ctx->r), 2);
53 cli_hexdump_rev(&(ctx->c), 2);
55 cli_hexdump(&(ctx->d), 1);
56 cli_putstr("\t bs: ");
57 cli_hexdump(&(ctx->bs), 1);
62 static const uint64_t rc[] = {
63 0x0000000000000001LL, 0x0000000000008082LL,
64 0x800000000000808ALL, 0x8000000080008000LL,
65 0x000000000000808BLL, 0x0000000080000001LL,
66 0x8000000080008081LL, 0x8000000000008009LL,
67 0x000000000000008ALL, 0x0000000000000088LL,
68 0x0000000080008009LL, 0x000000008000000ALL,
69 0x000000008000808BLL, 0x800000000000008BLL,
70 0x8000000000008089LL, 0x8000000000008003LL,
71 0x8000000000008002LL, 0x8000000000000080LL,
72 0x000000000000800ALL, 0x800000008000000ALL,
73 0x8000000080008081LL, 0x8000000000008080LL,
74 0x0000000080000001LL, 0x8000000080008008LL
78 uint64_t rotl64(uint64_t a, uint8_t r){
79 return (a<<r)|(a>>(64-r));
82 static const uint8_t r[5][5] = {
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);
104 cli_putstr("\r\nAfter theta:");
105 keccak_dump_state(a);
110 b[(2*i+3*j)%5][j] = rotl64(a[j][i], r[i][j]);
114 cli_putstr("\r\n--- after rho & pi ---");
115 keccak_dump_state(a);
120 a[j][i] = b[j][i] ^ ((~(b[j][(i+1)%5]))&(b[j][(i+2)%5]));
124 cli_putstr("\r\nAfter chi:");
125 keccak_dump_state(a);
132 cli_putstr("\r\nAfter iota:");
133 keccak_dump_state(a);
137 void keccak_f1600(uint64_t a[5][5]){
141 cli_putstr("\r\n\r\n--- Round ");
149 void keccak_nextBlock(keccak_ctx_t* ctx, const void* block){
150 memxor(ctx->a, block, ctx->bs);
151 keccak_f1600(ctx->a);
154 void keccak_lastBlock(keccak_ctx_t* ctx, const void* block, uint16_t length_b){
155 while(length_b>=ctx->r){
156 keccak_nextBlock(ctx, block);
157 block = (uint8_t*)block + ctx->bs;
160 uint8_t tmp[ctx->bs];
162 memset(tmp, 0x00, ctx->bs);
163 memcpy(tmp, block, (length_b+7)/8);
166 /* we have some single bits */
168 t = tmp[length_b/8]>>(8-(length_b&7));
169 t |= 0x01<<(length_b&7);
172 tmp[length_b/8] = 0x01;
177 if(length_b/8+1+3<=ctx->bs){
178 memcpy(tmp+length_b/8+1, pad, 3);
180 if(length_b/8+1+2<=ctx->bs){
181 memcpy(tmp+length_b/8+1, pad, 2);
182 keccak_nextBlock(ctx, tmp);
183 memset(tmp, 0x00, ctx->bs);
186 if(length_b/8+1+1<=ctx->bs){
187 memcpy(tmp+length_b/8+1, pad, 1);
188 keccak_nextBlock(ctx, tmp);
189 memset(tmp, 0x00, ctx->bs);
193 keccak_nextBlock(ctx, tmp);
194 memset(tmp, 0x00, ctx->bs);
201 keccak_nextBlock(ctx, tmp);
204 void keccak_ctx2hash(void* dest, uint16_t length_b, keccak_ctx_t* ctx){
205 while(length_b>=ctx->r){
206 memcpy(dest, ctx->a, ctx->bs);
207 dest = (uint8_t*)dest + ctx->bs;
209 keccak_f1600(ctx->a);
211 memcpy(dest, ctx->a, (length_b+7)/8);
214 void keccak224_ctx2hash(void* dest, keccak_ctx_t* ctx){
215 keccak_ctx2hash(dest, 224, ctx);
218 void keccak256_ctx2hash(void* dest, keccak_ctx_t* ctx){
219 keccak_ctx2hash(dest, 256, ctx);
222 void keccak384_ctx2hash(void* dest, keccak_ctx_t* ctx){
223 keccak_ctx2hash(dest, 384, ctx);
226 void keccak512_ctx2hash(void* dest, keccak_ctx_t* ctx){
227 keccak_ctx2hash(dest, 512, ctx);
231 1. SHA3-224: ⌊Keccak[r = 1152, c = 448, d = 28]⌋224
232 2. SHA3-256: ⌊Keccak[r = 1088, c = 512, d = 32]⌋256
233 3. SHA3-384: ⌊Keccak[r = 832, c = 768, d = 48]⌋384
234 4. SHA3-512: ⌊Keccak[r = 576, c = 1024, d = 64]⌋512
236 void keccak_init(uint16_t r, uint16_t c, uint8_t d, keccak_ctx_t* ctx){
237 memset(ctx->a, 0x00, 5*5*8);
241 ctx->bs = (uint8_t)(r/8);
244 void keccak224_init(keccak_ctx_t* ctx){
245 keccak_init(1152, 448, 28, ctx);
248 void keccak256_init(keccak_ctx_t* ctx){
249 keccak_init(1088, 512, 32, ctx);
252 void keccak384_init(keccak_ctx_t* ctx){
253 keccak_init( 832, 768, 48, ctx);
256 void keccak512_init(keccak_ctx_t* ctx){
257 keccak_init( 576, 1024, 64, ctx);