shabal/shabal512.c

   1 /* shabal512.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    shabal512.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 shabal512_iv[] PROGMEM = {
  34         /* A */
  35         0x20728DFD, 0x46C0BD53, 0xE782B699, 0x55304632,
  36         0x71B4EF90, 0x0EA9E82C, 0xDBB930F1, 0xFAD06B8B,
  37         0xBE0CAE40, 0x8BD14410, 0x76D2ADAC, 0x28ACAB7F,
  38         /* B */
  39         0xC1099CB7, 0x07B385F3, 0xE7442C26, 0xCC8AD640,
  40         0xEB6F56C7, 0x1EA81AA9, 0x73B9D314, 0x1DE85D08,
  41         0x48910A5A, 0x893B22DB, 0xC5A0DF44, 0xBBC4324E,
  42         0x72D2F240, 0x75941D99, 0x6D8BDE82, 0xA1A7502B,
  43         /* C */
  44         0xD9BF68D1, 0x58BAD750, 0x56028CB2, 0x8134F359,
  45         0xB5D469D8, 0x941A8CC2, 0x418B2A6E, 0x04052780,
  46         0x7F07D787, 0x5194358F, 0x3C60D665, 0xBE97D79A,
  47         0x950C3434, 0xAED9A06D, 0x2537DC8D, 0x7CDB5969,
  48 };
  49
  50 void shabal512_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(&(shabal512_iv[i]));
  57         }
  58         for(i=0;i<16;++i){
  59                 ctx->b[i] = pgm_read_dword(&(shabal512_iv[SHABAL_R+i]));
  60         }
  61         for(i=0;i<16;++i){
  62                 ctx->c[i] = pgm_read_dword(&(shabal512_iv[SHABAL_R+16+i]));
  63         }
  64 }
  65
  66 void shabal512_ctx2hash(void *dest, const shabal_ctx_t *ctx){
  67         shabal_ctx2hash(dest, ctx, 512);
  68 }
  69
  70 void shabal512(void *dest, void *msg, uint32_t length_b){
  71         shabal_ctx_t ctx;
  72         shabal512_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         shabal512_ctx2hash(dest, &ctx);
  80 }