shabal/shabal224.c

   1 /* shabal224.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    shabal224.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 uint32_t shabal224_iv[] PROGMEM = {
  34         /* A */
  35         0xA5201467, 0xA9B8D94A, 0xD4CED997, 0x68379D7B,
  36         0xA7FC73BA, 0xF1A2546B, 0x606782BF, 0xE0BCFD0F,
  37         0x2F25374E, 0x069A149F, 0x5E2DFF25, 0xFAECF061,
  38         /* B */
  39         0xEC9905D8, 0xF21850CF, 0xC0A746C8, 0x21DAD498,
  40         0x35156EEB, 0x088C97F2, 0x26303E40, 0x8A2D4FB5,
  41     0xFEEE44B6, 0x8A1E9573, 0x7B81111A, 0xCBC139F0,
  42         0xA3513861, 0x1D2C362E, 0x918C580E, 0xB58E1B9C,
  43         /* C */
  44         0xE4B573A1, 0x4C1A0880, 0x1E907C51, 0x04807EFD,
  45         0x3AD8CDE5, 0x16B21302, 0x02512C53, 0x2204CB18,
  46     0x99405F2D, 0xE5B648A1, 0x70AB1D43, 0xA10C25C2,
  47         0x16F1AC05, 0x38BBEB56, 0x9B01DC60, 0xB1096D83
  48 };
  49
  50 void shabal224_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(&(shabal224_iv[i]));
  57         }
  58         for(i=0;i<16;++i){
  59                 ctx->b[i] = pgm_read_dword(&(shabal224_iv[SHABAL_R+i]));
  60         }
  61         for(i=0;i<16;++i){
  62                 ctx->c[i] = pgm_read_dword(&(shabal224_iv[SHABAL_R+16+i]));
  63         }
  64 }
  65
  66 void shabal224_ctx2hash(void* dest, const shabal_ctx_t* ctx){
  67         shabal_ctx2hash(dest, ctx, 224);
  68 }
  69
  70 void shabal224(void* dest, void* msg, uint32_t length_b){
  71         shabal_ctx_t ctx;
  72         shabal224_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         shabal224_ctx2hash(dest, &ctx);
  80 }