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/>.
21 * \email daniel.otte@rub.de
24 * \license GPLv3 or later
31 #include "cubehash_rotates.h"
37 • Add x_0jklm into x_1jklm modulo 2**32 , for each (j, k, l, m).
38 • Rotate x_0jklm upwards by 7 bits, for each (j, k, l, m).
39 • Swap x_00klm with x_01klm , for each (k, l, m).
40 • Xor x_1jklm into x_0jklm , for each (j, k, l, m).
41 • Swap x_1jk0m with x_1jk1m , for each (j, k, m).
42 • Add x_0jklm into x_1jklm modulo 2**32 , for each (j, k, l, m).
43 • Rotate x_0jklm upwards by 11 bits, for each (j, k, l, m).
44 • Swap x_0j0lm with x_0j1lm , for each (j, l, m).
45 • Xor x_1jklm into x_0jklm , for each (j, k, l, m).
46 • Swap x_1jkl0 with x_1jkl1 , for each (j, k, l).
49 static void cubehash_round(cubehash_ctx_t* ctx){
53 ctx->a[i+16] += t = ctx->a[i];
54 ctx->a[i] = rotate7left(t);
56 xchg32_array(&(ctx->a[0]), &(ctx->a[8]), 8);
60 ctx->a[i+16] = ctx->a[i+18] + t2;
61 ctx->a[i] = rotate11left(t2);
62 t2 = ctx->a[i+2] ^= ctx->a[i+18];
63 ctx->a[i+18] = t + t2;
64 ctx->a[i+2] = rotate11left(t2);
66 t2 = ctx->a[i+1] ^= t;
67 ctx->a[i+17] = ctx->a[i+19] + t2;
68 ctx->a[i+1] = rotate11left(t2);
69 t2 = ctx->a[i+3] ^= ctx->a[i+19];
70 ctx->a[i+19] = t + t2;
71 ctx->a[i+3] = rotate11left(t2);
73 xchg32_array(&(ctx->a[0]), &(ctx->a[4]), 4);
74 xchg32_array(&(ctx->a[8]), &(ctx->a[12]), 4);
76 ctx->a[i] ^= t = ctx->a[i+16];
77 ctx->a[i+1] ^= ctx->a[i+16] = ctx->a[i+17];
82 void cubehash_init(uint8_t r, uint8_t b, uint16_t h, cubehash_ctx_t* ctx){
83 memset(ctx->a, 0, 32*4);
89 for(b=0; b<10*r; ++b){
94 void cubehash_nextBlock(cubehash_ctx_t* ctx, void* block){
96 memxor(ctx->a, block, ctx->blocksize_B);
97 for(i=0; i<ctx->rounds; ++i){
102 void cubehash_lastBlock(cubehash_ctx_t* ctx, void* block, uint16_t length_b){
103 while(length_b>=ctx->blocksize_B*8){
104 cubehash_nextBlock(ctx, block);
105 block = (uint8_t*)block + ctx->blocksize_B;
106 length_b -= ctx->blocksize_B*8;
108 uint8_t buffer[ctx->blocksize_B];
110 memset(buffer, 0, ctx->blocksize_B);
111 memcpy(buffer, block, (length_b+7)/8);
112 buffer[length_b/8] |= 0x80 >> (length_b&7);
113 cubehash_nextBlock(ctx, buffer);
115 for(i=0; i<10*(ctx->rounds); ++i){
120 void cubehash_ctx2hash(void* dest, uint16_t length_b, cubehash_ctx_t* ctx){
121 memcpy(dest, ctx->a, (length_b+7)/8);
124 /******************************************************************************/
126 void cubehash224_init(cubehash_ctx_t* ctx){
127 cubehash_init(16, 32, 224, ctx);
130 void cubehash224_ctx2hash(void* dest, cubehash_ctx_t* ctx){
131 cubehash_ctx2hash(dest, 224, ctx);
134 /******************************************************************************/
136 void cubehash256_init(cubehash_ctx_t* ctx){
137 cubehash_init(16, 32, 256, ctx);
140 void cubehash256_ctx2hash(void* dest, cubehash_ctx_t* ctx){
141 cubehash_ctx2hash(dest, 256, ctx);
144 /******************************************************************************/
146 void cubehash384_init(cubehash_ctx_t* ctx){
147 cubehash_init(16, 32, 384, ctx);
150 void cubehash384_ctx2hash(void* dest, cubehash_ctx_t* ctx){
151 cubehash_ctx2hash(dest, 384, ctx);
154 /******************************************************************************/
156 void cubehash512_init(cubehash_ctx_t* ctx){
157 cubehash_init(16, 32, 512, ctx);
160 void cubehash512_ctx2hash(void* dest, cubehash_ctx_t* ctx){
161 cubehash_ctx2hash(dest, 512, ctx);