1 /* threefish1024_enc.c */
3 This file is part of the AVR-Crypto-Lib.
4 Copyright (C) 2009 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/>.
21 * \email daniel.otte@rub.de
23 * \license GPLv3 or later
31 #include "threefish.h"
33 #define X(a) (((uint64_t*)data)[(a)])
36 void permute_inv16(void* data){
59 void add_key_16(void* data, const threefish1024_ctx_t* ctx, uint8_t s){
62 X(i) -= ctx->k[(s+i)%17];
64 X(13) -= ctx->k[(s+13)%17] + ctx->t[s%3];
65 X(14) -= ctx->k[(s+14)%17] + ctx->t[(s+1)%3];
66 X(15) -= ctx->k[(s+15)%17] + s;
69 void threefish1024_dec(void* data, const threefish1024_ctx_t* ctx){
71 uint8_t r0[8] = {0x69, 0x72, 0x21, 0x34, 0x42, 0x41, 0x31, 0x79};
72 uint8_t r1[8] = {0x61, 0x19, 0x1a, 0x19, 0x53, 0x10, 0x31, 0x53};
73 uint8_t r2[8] = {0x33, 0x40, 0x22, 0x69, 0x31, 0x22, 0x6a, 0x5b};
74 uint8_t r3[8] = {0x72, 0x6b, 0x31, 0x60, 0x74, 0x71, 0x2b, 0x50};
75 uint8_t r4[8] = {0x5b, 0x23, 0x53, 0x63, 0x54, 0x3b, 0x2a, 0x20};
76 uint8_t r5[8] = {0x60, 0x22, 0x52, 0x11, 0x11, 0x14, 0x2b, 0x3a};
77 uint8_t r6[8] = {0x7b, 0x02, 0x50, 0x43, 0x73, 0x40, 0x64, 0x5a};
78 uint8_t r7[8] = {0x70, 0x70, 0x29, 0x51, 0x42, 0x7a, 0x71, 0x14};
82 add_key_16(data, ctx, s);
86 threefish_invmix((uint8_t*)data + 0, r0[i%8]);
87 threefish_invmix((uint8_t*)data + 16, r1[i%8]);
88 threefish_invmix((uint8_t*)data + 32, r2[i%8]);
89 threefish_invmix((uint8_t*)data + 48, r3[i%8]);
90 threefish_invmix((uint8_t*)data + 64, r4[i%8]);
91 threefish_invmix((uint8_t*)data + 80, r5[i%8]);
92 threefish_invmix((uint8_t*)data + 96, r6[i%8]);
93 threefish_invmix((uint8_t*)data +112, r7[i%8]);
96 add_key_16(data, ctx, s);