blake/blake_large.c

   1 /* blake_large.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    blake_large.c
  21  * \author  Daniel Otte
  22  * \email   daniel.otte@rub.de
  23  * \date    2009-05-08
  24  * \license GPLv3 or later
  25  *
  26  */
  27
  28 #include <stdint.h>
  29 #include <string.h>
  30 #include <avr/pgmspace.h>
  31 #include "memxor.h"
  32 #include "blake_large.h"
  33 #include "blake_common.h"
  34
  35 #include "cli.h"
  36
  37 #define BUG_3 0 /* bug compatibility with reference code */
  38 #define BUG_4 0 /* bug compatibility with reference code */
  39
  40 uint64_t pgm_read_qword(void* p){
  41         union{
  42                 uint64_t v64;
  43                 uint32_t v32[2];
  44         }r;
  45         r.v32[0] = pgm_read_dword(p);
  46         r.v32[1] = pgm_read_dword((uint8_t*)p+4);
  47         return r.v64;
  48 }
  49
  50 static
  51 uint64_t blake_c[] PROGMEM = {
  52    0x243F6A8885A308D3LL, 0x13198A2E03707344LL,
  53    0xA4093822299F31D0LL, 0x082EFA98EC4E6C89LL,
  54    0x452821E638D01377LL, 0xBE5466CF34E90C6CLL,
  55    0xC0AC29B7C97C50DDLL, 0x3F84D5B5B5470917LL,
  56    0x9216D5D98979FB1BLL, 0xD1310BA698DFB5ACLL,
  57    0x2FFD72DBD01ADFB7LL, 0xB8E1AFED6A267E96LL,
  58    0xBA7C9045F12C7F99LL, 0x24A19947B3916CF7LL,
  59    0x0801F2E2858EFC16LL, 0x636920D871574E69LL
  60 };
  61
  62
  63
  64 #define ROTL64(a, n) (((a)<<(n))|((a)>>(64-(n))))
  65 #define ROTR64(a, n) (((a)>>(n))|((a)<<(64-(n))))
  66 #define CHANGE_ENDIAN32(a) (((a)<<24)| \
  67                             ((0x0000ff00&(a))<<8)| \
  68                                                     ((0x00ff0000&(a))>>8)| \
  69                                                     (a)>>24 )
  70
  71 void blake_large_expand(uint64_t* v, const blake_large_ctx_t* ctx){
  72         uint8_t i;
  73         memcpy(v, ctx->h, 8*8);
  74         for(i=0; i<8; ++i){
  75                 v[8+i] = pgm_read_qword(&(blake_c[i]));
  76         }
  77         memxor((uint8_t*)v+8, ctx->s, 4*8);
  78
  79 }
  80
  81 void blake_large_changeendian(void* dest, const void* src){
  82         uint8_t i;
  83         uint32_t tmp;
  84         for(i=0; i<32; i+=2){
  85                 tmp = CHANGE_ENDIAN32(((uint32_t*)src)[i]);
  86                 ((uint32_t*)dest)[i] = CHANGE_ENDIAN32(((uint32_t*)src)[i+1]);
  87                 ((uint32_t*)dest)[i+1] = tmp;
  88         }
  89 }
  90
  91 void blake_large_compress(uint64_t* v,const void* m){
  92         uint8_t r,i;
  93         uint8_t a,b,c,d, s0, s1;
  94 //      cli_putstr_P(PSTR("\r\nblock:"));
  95 //      cli_hexdump_block(m, 128, 5, 8);
  96         for(r=0; r<14; ++r){
  97                 for(i=0; i<8; ++i){
  98         //              blake_large_g(r%10, i, v, (uint64_t*)m);
  99                         a = pgm_read_byte(blake_index_lut+4*i+0);
 100                         b = pgm_read_byte(blake_index_lut+4*i+1);
 101                         c = pgm_read_byte(blake_index_lut+4*i+2);
 102                         d = pgm_read_byte(blake_index_lut+4*i+3);
 103                         s0 = pgm_read_byte(blake_sigma+16*r+2*i+0);
 104                         s1 = pgm_read_byte(blake_sigma+16*r+2*i+1);
 105                         v[a] += v[b] + (((uint64_t*)m)[s0] ^ pgm_read_qword(&(blake_c[s1])));
 106                         v[d]  = ROTR64(v[d]^v[a], 32);
 107                         v[c] += v[d];
 108                         v[b]  = ROTR64(v[b]^v[c], 25);
 109                         v[a] += v[b] + (((uint64_t*)m)[s1] ^ pgm_read_qword(&(blake_c[s0])));
 110                         v[d]  = ROTR64(v[d]^v[a], 16);
 111                         v[c] += v[d];
 112                         v[b]  = ROTR64(v[b]^v[c], 11);
 113                 }
 114 /*
 115                 cli_putstr_P(PSTR("\r\nv:"));
 116                 for(i=0; i<16; ++i){
 117                         if(i%4==0)
 118                                 cli_putstr_P(PSTR("\r\n    "));
 119                         cli_hexdump_rev(&(v[i]), 8);
 120                         cli_putc(' ');
 121                 }
 122 */
 123         }
 124 }
 125
 126 void blake_large_collapse(blake_large_ctx_t* ctx, uint64_t* v){
 127         uint8_t i;
 128         for(i=0; i<8; ++i){
 129                 ctx->h[i] ^= ctx->s[i%4] ^ v[i] ^ v[8+i];
 130         }
 131 }
 132
 133 void blake_large_nextBlock(blake_large_ctx_t* ctx, const void* msg){
 134         uint64_t v[16];
 135         uint64_t m[16];
 136         union {
 137                 uint64_t v64;
 138                 uint32_t v32[2];
 139         }ctr;
 140         blake_large_expand(v,ctx);
 141         ctx->counter++;
 142         ctr.v64 = ctx->counter*1024;
 143         v[12] ^= ctr.v64;
 144         v[13] ^= ctr.v64;
 145         blake_large_changeendian(m, msg);
 146         blake_large_compress(v, m);
 147         blake_large_collapse(ctx, v);
 148 }
 149
 150 void blake_large_lastBlock(blake_large_ctx_t* ctx, const void* msg, uint16_t length_b){
 151         while(length_b>=BLAKE_LARGE_BLOCKSIZE){
 152                 blake_large_nextBlock(ctx, msg);
 153                 msg = (uint8_t*)msg + BLAKE_LARGE_BLOCKSIZE_B;
 154                 length_b -= BLAKE_LARGE_BLOCKSIZE;
 155         }
 156         uint8_t buffer[128];
 157         uint64_t v[16];
 158         uint64_t ctr;
 159         ctr = ctx->counter*1024+length_b;
 160         memset(buffer, 0, 128);
 161         memcpy(buffer, msg, (length_b+7)/8);
 162         buffer[length_b/8] |= 0x80 >> (length_b&0x7);
 163         blake_large_changeendian(buffer, buffer);
 164         blake_large_expand(v, ctx);
 165 #if BUG_3
 166         uint8_t x=0;
 167         if(length_b%1024<895 && length_b%8)
 168                 x=0x40;
 169         v[12] ^= ctr + x;
 170         v[13] ^= ctr + x;
 171
 172 #else
 173         if(length_b){
 174                 v[12] ^= ctr;
 175                 v[13] ^= ctr;
 176         }
 177 #endif
 178         if(length_b>1024-128-2){
 179 #if BUG_4
 180                 if(length_b<1017){
 181                         blake_large_compress(v, buffer);
 182                         blake_large_collapse(ctx, v);
 183                 }
 184 #else
 185                 blake_large_compress(v, buffer);
 186                 blake_large_collapse(ctx, v);
 187 #endif
 188                 memset(buffer, 0, 128-8);
 189                 blake_large_expand(v, ctx);
 190         }
 191         if(ctx->appendone)
 192                 buffer[128-16-8] |= 0x01;
 193         *((uint64_t*)(&(buffer[128-8]))) = ctr;
 194         blake_large_compress(v, buffer);
 195         blake_large_collapse(ctx, v);
 196
 197 }
 198
 199 uint64_t blake64_iv[] PROGMEM = {
 200     0x6A09E667F3BCC908LL, 0xBB67AE8584CAA73BLL,
 201     0x3C6EF372FE94F82BLL, 0xA54FF53A5F1D36F1LL,
 202     0x510E527FADE682D1LL, 0x9B05688C2B3E6C1FLL,
 203     0x1F83D9ABFB41BD6BLL, 0x5BE0CD19137E2179LL
 204 };
 205
 206 void blake64_init(blake64_ctx_t* ctx){
 207         uint8_t i;
 208         for(i=0; i<8; ++i){
 209                 ctx->h[i] = pgm_read_qword(&(blake64_iv[i]));
 210         }
 211         memset(ctx->s, 0, 4*8);
 212         ctx->counter = 0;
 213         ctx->appendone = 1;
 214 }
 215
 216 uint64_t blake48_iv[] PROGMEM = {
 217     0xCBBB9D5DC1059ED8LL, 0x629A292A367CD507LL,
 218     0x9159015A3070DD17LL, 0x152FECD8F70E5939LL,
 219     0x67332667FFC00B31LL, 0x8EB44A8768581511LL,
 220     0xDB0C2E0D64F98FA7LL, 0x47B5481DBEFA4FA4LL
 221 };
 222
 223 void blake48_init(blake48_ctx_t* ctx){
 224         uint8_t i;
 225         for(i=0; i<8; ++i){
 226                 ctx->h[i] = pgm_read_qword(&(blake48_iv[i]));
 227         }
 228         memset(ctx->s, 0, 4*8);
 229         ctx->counter = 0;
 230         ctx->appendone = 0;
 231 }
 232
 233 void blake64_ctx2hash(void* dest, const blake64_ctx_t* ctx){
 234         uint8_t i;
 235         for(i=0; i<8; ++i){
 236                 ((uint32_t*)dest)[2*i+0] = CHANGE_ENDIAN32((ctx->h[i])>>32);
 237                 ((uint32_t*)dest)[2*i+1] = CHANGE_ENDIAN32((uint32_t)ctx->h[i]);
 238         }
 239 }
 240
 241 void blake48_ctx2hash(void* dest, const blake48_ctx_t* ctx){
 242         uint8_t i;
 243         for(i=0; i<6; ++i){
 244                 ((uint32_t*)dest)[2*i+0] = CHANGE_ENDIAN32((ctx->h[i])>>32);
 245                 ((uint32_t*)dest)[2*i+1] = CHANGE_ENDIAN32((uint32_t)ctx->h[i]);
 246         }
 247 }
 248
 249 void blake64_nextBlock(blake64_ctx_t* ctx, const void* block){
 250         blake_large_nextBlock(ctx, block);
 251 }
 252
 253 void blake48_nextBlock(blake48_ctx_t* ctx, const void* block){
 254         blake_large_nextBlock(ctx, block);
 255 }
 256
 257 void blake64_lastBlock(blake64_ctx_t* ctx, const void* block, uint16_t length_b){
 258         blake_large_lastBlock(ctx, block, length_b);
 259 }
 260
 261 void blake48_lastBlock(blake48_ctx_t* ctx, const void* block, uint16_t length_b){
 262         blake_large_lastBlock(ctx, block, length_b);
 263 }
 264
 265 void blake64(void* dest, const void* msg, uint32_t length_b){
 266         blake_large_ctx_t ctx;
 267         blake64_init(&ctx);
 268         while(length_b>=BLAKE_LARGE_BLOCKSIZE){
 269                 blake_large_nextBlock(&ctx, msg);
 270                 msg = (uint8_t*)msg + BLAKE_LARGE_BLOCKSIZE_B;
 271                 length_b -= BLAKE_LARGE_BLOCKSIZE;
 272         }
 273         blake_large_lastBlock(&ctx, msg, length_b);
 274         blake64_ctx2hash(dest, &ctx);
 275 }
 276
 277 void blake48(void* dest, const void* msg, uint32_t length_b){
 278         blake_large_ctx_t ctx;
 279         blake48_init(&ctx);
 280         while(length_b>=BLAKE_LARGE_BLOCKSIZE){
 281                 blake_large_nextBlock(&ctx, msg);
 282                 msg = (uint8_t*)msg + BLAKE_LARGE_BLOCKSIZE_B;
 283                 length_b -= BLAKE_LARGE_BLOCKSIZE;
 284         }
 285         blake_large_lastBlock(&ctx, msg, length_b);
 286         blake48_ctx2hash(dest, &ctx);
 287 }