shabal/shabal256.c

   1 /* shabal256.c */
   2 /*
   3     This file is part of the AVR-Crypto-Lib.
   4     Copyright (C) 2009  Daniel Otte (daniel.otte@rub.de)
   5
   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.
  10
  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.
  15
  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/>.
  18 */
  19 /*
  20  * \file    shabal256.c
  21  * \author  Daniel Otte
  22  * \email   daniel.otte@rub.de
  23  * \date    2009-04-27
  24  * \license GPLv3 or later
  25  *
  26  */
  27
  28 #include <stdint.h>
  29 #include "shabal.h"
  30 #include <avr/pgmspace.h>
  31 #include <string.h>
  32
  33 const uint32_t shabal256_iv[] PROGMEM = {
  34         /* A */
  35         0x52F84552, 0xE54B7999, 0x2D8EE3EC, 0xB9645191,
  36         0xE0078B86, 0xBB7C44C9, 0xD2B5C1CA, 0xB0D2EB8C,
  37         0x14CE5A45, 0x22AF50DC, 0xEFFDBC6B, 0xEB21B74A,
  38         /* B */
  39         0xB555C6EE, 0x3E710596, 0xA72A652F, 0x9301515F,
  40         0xDA28C1FA, 0x696FD868, 0x9CB6BF72, 0x0AFE4002,
  41     0xA6E03615, 0x5138C1D4, 0xBE216306, 0xB38B8890,
  42         0x3EA8B96B, 0x3299ACE4, 0x30924DD4, 0x55CB34A5,
  43         /* C */
  44         0xB405F031, 0xC4233EBA, 0xB3733979, 0xC0DD9D55,
  45         0xC51C28AE, 0xA327B8E1, 0x56C56167, 0xED614433,
  46         0x88B59D60, 0x60E2CEBA, 0x758B4B8B, 0x83E82A7F,
  47         0xBC968828, 0xE6E00BF7, 0xBA839E55, 0x9B491C60
  48 };
  49
  50 void shabal256_init(shabal_ctx_t *ctx){
  51         uint8_t i;
  52         ctx->b = ctx->b_buffer;
  53         ctx->c = ctx->c_buffer;
  54         ctx->w.w64 = 1LL;
  55         for(i=0;i<SHABAL_R;++i){
  56                 ctx->a[i] = pgm_read_dword(&(shabal256_iv[i]));
  57         }
  58         for(i=0;i<16;++i){
  59                 ctx->b[i] = pgm_read_dword(&(shabal256_iv[SHABAL_R+i]));
  60         }
  61         for(i=0;i<16;++i){
  62                 ctx->c[i] = pgm_read_dword(&(shabal256_iv[SHABAL_R+16+i]));
  63         }
  64 }
  65
  66 void shabal256_ctx2hash(void *dest, const shabal_ctx_t *ctx){
  67         shabal_ctx2hash(dest, ctx, 256);
  68 }
  69
  70 void shabal256(void *dest, void *msg, uint32_t length_b){
  71         shabal_ctx_t ctx;
  72         shabal256_init(&ctx);
  73         while(length_b>=SHABAL_BLOCKSIZE){
  74                 shabal_nextBlock(&ctx, msg);
  75                 msg = (uint8_t*)msg+SHABAL_BLOCKSIZE_B;
  76                 length_b -= SHABAL_BLOCKSIZE;
  77         }
  78         shabal_lastBlock(&ctx, msg, length_b);
  79         shabal256_ctx2hash(dest, &ctx);
  80 }