3 This file is part of the AVR-Crypto-Lib.
4 Copyright (C) 2008 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/>.
22 * email: daniel.otte@rub.de
32 #define G(i) ((((*ctx)[(i)/8])>>(((i)%8)))&1)
33 #define S(i,v) ((*ctx)[(i)/8] = ((*ctx)[(i)/8] & ~(1<<((i)%8))) | ((v)<<((i)%8)))
34 uint8_t trivium_enc(trivium_ctx_t* ctx){
41 t1 ^= (G(90) & G(91)) ^ G(170);
42 t2 ^= (G(174) & G(175)) ^ G(263);
43 t3 ^= (G(285) & G(286)) ^ G(68);
45 /* shift whole state and insert ts later */
49 (*ctx)[i] = (((*ctx)[i])<<1)|c1;
60 #define KEYSIZE_B ((keysize_b+7)/8)
61 #define IVSIZE_B ((ivsize_b +7)/8)
63 void trivium_init(const void* key, uint16_t keysize_b,
64 const void* iv, uint16_t ivsize_b,
69 memset((*ctx)+KEYSIZE_B, 0, 35-KEYSIZE_B);
70 memcpy((*ctx), key, KEYSIZE_B);
71 memcpy((*ctx)+12, iv, IVSIZE_B); /* iv0 is at s96, must shift to s93 */
73 for(i=12+IVSIZE_B; i>10; --i){
75 (*ctx)[i] = (((*ctx)[i])>>3)|c1;
80 for(i=0; i<4*288; ++i){