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 uint8_t keccak_rc_comp[] PROGMEM = {
67 0x01, 0x92, 0xda, 0x70,
68 0x9b, 0x21, 0xf1, 0x59,
69 0x8a, 0x88, 0x39, 0x2a,
70 0xbb, 0xcb, 0xd9, 0x53,
71 0x52, 0xc0, 0x1a, 0x6a,
72 0xf1, 0xd0, 0x21, 0x78,
75 const uint8_t keccak_rotate_codes[5][5] PROGMEM = {
76 { ROT_CODE( 0), ROT_CODE( 1), ROT_CODE(62), ROT_CODE(28), ROT_CODE(27) },
77 { ROT_CODE(36), ROT_CODE(44), ROT_CODE( 6), ROT_CODE(55), ROT_CODE(20) },
78 { ROT_CODE( 3), ROT_CODE(10), ROT_CODE(43), ROT_CODE(25), ROT_CODE(39) },
79 { ROT_CODE(41), ROT_CODE(45), ROT_CODE(15), ROT_CODE(21), ROT_CODE( 8) },
80 { ROT_CODE(18), ROT_CODE( 2), ROT_CODE(61), ROT_CODE(56), ROT_CODE(14) }
83 void keccak_f1600(uint64_t a[5][5]);
85 void keccak_nextBlock(keccak_ctx_t* ctx, const void* block){
86 memxor(ctx->a, block, ctx->bs);
90 void keccak_lastBlock(keccak_ctx_t* ctx, const void* block, uint16_t length_b){
91 while(length_b >= ctx->r){
92 keccak_nextBlock(ctx, block);
93 block = (uint8_t*)block + ctx->bs;
96 memxor(ctx->a, block, (length_b)/8);
99 /* we have some single bits */
101 t = ((uint8_t*)block)[length_b / 8] >> (8 - (length_b & 7));
102 t |= 0x01 << (length_b & 7);
103 ((uint8_t*)ctx->a)[length_b / 8] ^= t;
105 ((uint8_t*)ctx->a)[length_b / 8] ^= 0x01;
107 if(length_b / 8 + 1 + 3 <= ctx->bs){
108 *((uint8_t*)ctx->a + length_b / 8 + 1) ^= ctx->d;
109 *((uint8_t*)ctx->a + length_b / 8 + 2) ^= ctx->bs;
110 *((uint8_t*)ctx->a + length_b / 8 + 3) ^= 1;
112 if(length_b / 8 + 1 + 2 <= ctx->bs){
113 *((uint8_t*)ctx->a + length_b / 8 + 1) ^= ctx->d;
114 *((uint8_t*)ctx->a + length_b / 8 + 2) ^= ctx->bs;
115 keccak_f1600(ctx->a);
116 ((uint8_t*)ctx->a)[0] ^= 0x01;
118 if(length_b/8+1+1 <= ctx->bs){
119 *((uint8_t*)ctx->a + length_b / 8 + 1) ^= ctx->d;
120 keccak_f1600(ctx->a);
121 ((uint8_t*)ctx->a)[0] ^= ctx->bs;
122 ((uint8_t*)ctx->a)[1] ^= 0x01;
124 keccak_f1600(ctx->a);
125 ((uint8_t*)ctx->a)[0] ^= ctx->d;
126 ((uint8_t*)ctx->a)[1] ^= ctx->bs;
127 ((uint8_t*)ctx->a)[2] ^= 0x01;
131 keccak_f1600(ctx->a);
134 void keccak_ctx2hash(void* dest, uint16_t length_b, keccak_ctx_t* ctx){
135 while(length_b>=ctx->r){
136 memcpy(dest, ctx->a, ctx->bs);
137 dest = (uint8_t*)dest + ctx->bs;
139 keccak_f1600(ctx->a);
141 memcpy(dest, ctx->a, (length_b+7)/8);
144 void keccak224_ctx2hash(void* dest, keccak_ctx_t* ctx){
145 keccak_ctx2hash(dest, 224, ctx);
148 void keccak256_ctx2hash(void* dest, keccak_ctx_t* ctx){
149 keccak_ctx2hash(dest, 256, ctx);
152 void keccak384_ctx2hash(void* dest, keccak_ctx_t* ctx){
153 keccak_ctx2hash(dest, 384, ctx);
156 void keccak512_ctx2hash(void* dest, keccak_ctx_t* ctx){
157 keccak_ctx2hash(dest, 512, ctx);
161 1. SHA3-224: ⌊Keccak[r = 1152, c = 448, d = 28]⌋224
162 2. SHA3-256: ⌊Keccak[r = 1088, c = 512, d = 32]⌋256
163 3. SHA3-384: ⌊Keccak[r = 832, c = 768, d = 48]⌋384
164 4. SHA3-512: ⌊Keccak[r = 576, c = 1024, d = 64]⌋512
166 void keccak_init(uint16_t r, uint16_t c, uint8_t d, keccak_ctx_t* ctx){
167 memset(ctx->a, 0x00, 5 * 5 * 8);
171 ctx->bs = (uint8_t)(r / 8);
174 void keccak224_init(keccak_ctx_t* ctx){
175 keccak_init(1152, 448, 28, ctx);
178 void keccak256_init(keccak_ctx_t* ctx){
179 keccak_init(1088, 512, 32, ctx);
182 void keccak384_init(keccak_ctx_t* ctx){
183 keccak_init( 832, 768, 48, ctx);
186 void keccak512_init(keccak_ctx_t* ctx){
187 keccak_init( 576, 1024, 64, ctx);