blake/blake_large.c

   1 /* blake_large.c */
   2 /*
   3     This file is part of the ARM-Crypto-Lib.
   4     Copyright (C) 2006-2010  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 "memxor.h"
  31 #include "blake_large.h"
  32 #include "blake_common.h"
  33
  34 static const
  35 uint64_t blake_c[]  = {
  36    0x243F6A8885A308D3LL, 0x13198A2E03707344LL,
  37    0xA4093822299F31D0LL, 0x082EFA98EC4E6C89LL,
  38    0x452821E638D01377LL, 0xBE5466CF34E90C6CLL,
  39    0xC0AC29B7C97C50DDLL, 0x3F84D5B5B5470917LL,
  40    0x9216D5D98979FB1BLL, 0xD1310BA698DFB5ACLL,
  41    0x2FFD72DBD01ADFB7LL, 0xB8E1AFED6A267E96LL,
  42    0xBA7C9045F12C7F99LL, 0x24A19947B3916CF7LL,
  43    0x0801F2E2858EFC16LL, 0x636920D871574E69LL
  44 };
  45
  46
  47
  48 #define ROTL64(a, n) (((a)<<(n))|((a)>>(64-(n))))
  49 #define ROTR64(a, n) (((a)>>(n))|((a)<<(64-(n))))
  50 #define CHANGE_ENDIAN32(a) (((a)<<24)| \
  51                             ((0x0000ff00&(a))<<8)| \
  52                                                     ((0x00ff0000&(a))>>8)| \
  53                                                     (a)>>24 )
  54
  55 static
  56 void blake_large_expand(uint64_t* v, const blake_large_ctx_t* ctx){
  57         uint8_t i;
  58         memcpy(v, ctx->h, 8*8);
  59         for(i=0; i<8; ++i){
  60                 v[8+i] = blake_c[i];
  61         }
  62         memxor((uint8_t*)v+8, ctx->s, 4*8);
  63
  64 }
  65
  66 static
  67 void blake_large_changeendian(void* dest, const void* src){
  68         uint8_t i;
  69         uint32_t tmp;
  70         for(i=0; i<32; i+=2){
  71                 tmp = CHANGE_ENDIAN32(((uint32_t*)src)[i]);
  72                 ((uint32_t*)dest)[i] = CHANGE_ENDIAN32(((uint32_t*)src)[i+1]);
  73                 ((uint32_t*)dest)[i+1] = tmp;
  74         }
  75 }
  76
  77 #define A (v[idx.v8[0]])
  78 #define B (v[idx.v8[1]])
  79 #define C (v[idx.v8[2]])
  80 #define D (v[idx.v8[3]])
  81
  82 static
  83 void blake_large_compress(uint64_t* v,const void* m){
  84         uint8_t r,i;
  85         uint16_t s, *p=(uint16_t*)blake_sigma;
  86         union {
  87                 uint32_t v32;
  88                 uint8_t v8[4];
  89         }idx;
  90         for(r=0; r<16; ++r){
  91                 for(i=0; i<8; ++i){
  92                         idx.v32 = ((uint32_t*)blake_index_lut)[i];
  93                         s = *p++;
  94                         if(p==(uint16_t*)(blake_sigma + 160)){
  95                                 p=(uint16_t*)blake_sigma;
  96                         }
  97                         A += B + (((uint64_t*)m)[s&0xff] ^ blake_c[s>>8]);
  98                         D  = ROTR64(D^A, 32);
  99                         C += D;
 100                         B  = ROTR64(B^C, 25);
 101                         A += B + (((uint64_t*)m)[s>>8] ^ blake_c[s&0xff]);
 102                         D  = ROTR64(D^A, 16);
 103                         C += D;
 104                         B  = ROTR64(B^C, 11);
 105                 }
 106         }
 107 }
 108
 109 static
 110 void blake_large_collapse(blake_large_ctx_t* ctx, uint64_t* v){
 111         uint8_t i;
 112         for(i=0; i<8; ++i){
 113                 ctx->h[i] ^= ctx->s[i%4] ^ v[i] ^ v[8+i];
 114         }
 115 }
 116
 117 void blake_large_nextBlock(blake_large_ctx_t* ctx, const void* msg){
 118         uint64_t v[16];
 119         uint64_t m[16];
 120         union {
 121                 uint64_t v64;
 122                 uint32_t v32[2];
 123         }ctr;
 124         blake_large_expand(v,ctx);
 125         ctx->counter++;
 126         ctr.v64 = ctx->counter*1024;
 127         v[12] ^= ctr.v64;
 128         v[13] ^= ctr.v64;
 129         blake_large_changeendian(m, msg);
 130         blake_large_compress(v, m);
 131         blake_large_collapse(ctx, v);
 132 }
 133
 134 void blake_large_lastBlock(blake_large_ctx_t* ctx, const void* msg, uint16_t length_b){
 135         while(length_b>=BLAKE_LARGE_BLOCKSIZE){
 136                 blake_large_nextBlock(ctx, msg);
 137                 msg = (uint8_t*)msg + BLAKE_LARGE_BLOCKSIZE_B;
 138                 length_b -= BLAKE_LARGE_BLOCKSIZE;
 139         }
 140         uint8_t buffer[128];
 141         uint64_t v[16];
 142         uint64_t ctr;
 143         ctr = ctx->counter*1024+length_b;
 144         memset(buffer, 0, 128);
 145         memcpy(buffer, msg, (length_b+7)/8);
 146         buffer[length_b/8] |= 0x80 >> (length_b&0x7);
 147         blake_large_changeendian(buffer, buffer);
 148         blake_large_expand(v, ctx);
 149         if(length_b>1024-128-2){
 150                 v[12] ^= ctr;
 151                 v[13] ^= ctr;
 152                 blake_large_compress(v, buffer);
 153                 blake_large_collapse(ctx, v);
 154                 memset(buffer, 0, 128-8);
 155                 blake_large_expand(v, ctx);
 156         } else {
 157                 if(length_b){
 158                         v[12] ^= ctr;
 159                         v[13] ^= ctr;
 160                 }
 161         }
 162         if(ctx->appendone)
 163                 buffer[128-16-8] |= 0x01;
 164         *((uint64_t*)(&(buffer[128-8]))) = ctr;
 165         blake_large_compress(v, buffer);
 166         blake_large_collapse(ctx, v);
 167
 168 }
 169
 170 static const
 171 uint64_t blake512_iv[] = {
 172     0x6A09E667F3BCC908LL, 0xBB67AE8584CAA73BLL,
 173     0x3C6EF372FE94F82BLL, 0xA54FF53A5F1D36F1LL,
 174     0x510E527FADE682D1LL, 0x9B05688C2B3E6C1FLL,
 175     0x1F83D9ABFB41BD6BLL, 0x5BE0CD19137E2179LL
 176 };
 177
 178 void blake512_init(blake512_ctx_t* ctx){
 179         uint8_t i;
 180         for(i=0; i<8; ++i){
 181                 ctx->h[i] = blake512_iv[i];
 182         }
 183         memset(ctx->s, 0, 4*8);
 184         ctx->counter = 0;
 185         ctx->appendone = 1;
 186 }
 187
 188 static const
 189 uint64_t blake384_iv[] = {
 190     0xCBBB9D5DC1059ED8LL, 0x629A292A367CD507LL,
 191     0x9159015A3070DD17LL, 0x152FECD8F70E5939LL,
 192     0x67332667FFC00B31LL, 0x8EB44A8768581511LL,
 193     0xDB0C2E0D64F98FA7LL, 0x47B5481DBEFA4FA4LL
 194 };
 195
 196 void blake384_init(blake384_ctx_t* ctx){
 197         uint8_t i;
 198         for(i=0; i<8; ++i){
 199                 ctx->h[i] = blake384_iv[i];
 200         }
 201         memset(ctx->s, 0, 4*8);
 202         ctx->counter = 0;
 203         ctx->appendone = 0;
 204 }
 205
 206 void blake512_ctx2hash(void* dest, const blake512_ctx_t* ctx){
 207         uint8_t i;
 208         for(i=0; i<8; ++i){
 209                 ((uint32_t*)dest)[2*i+0] = CHANGE_ENDIAN32((ctx->h[i])>>32);
 210                 ((uint32_t*)dest)[2*i+1] = CHANGE_ENDIAN32((uint32_t)ctx->h[i]);
 211         }
 212 }
 213
 214 void blake384_ctx2hash(void* dest, const blake384_ctx_t* ctx){
 215         uint8_t i;
 216         for(i=0; i<6; ++i){
 217                 ((uint32_t*)dest)[2*i+0] = CHANGE_ENDIAN32((ctx->h[i])>>32);
 218                 ((uint32_t*)dest)[2*i+1] = CHANGE_ENDIAN32((uint32_t)ctx->h[i]);
 219         }
 220 }
 221
 222 void blake512_nextBlock(blake512_ctx_t* ctx, const void* block){
 223         blake_large_nextBlock(ctx, block);
 224 }
 225
 226 void blake384_nextBlock(blake384_ctx_t* ctx, const void* block){
 227         blake_large_nextBlock(ctx, block);
 228 }
 229
 230 void blake512_lastBlock(blake512_ctx_t* ctx, const void* block, uint16_t length_b){
 231         blake_large_lastBlock(ctx, block, length_b);
 232 }
 233
 234 void blake384_lastBlock(blake384_ctx_t* ctx, const void* block, uint16_t length_b){
 235         blake_large_lastBlock(ctx, block, length_b);
 236 }
 237
 238 void blake512(void* dest, const void* msg, uint32_t length_b){
 239         blake_large_ctx_t ctx;
 240         blake512_init(&ctx);
 241         while(length_b>=BLAKE_LARGE_BLOCKSIZE){
 242                 blake_large_nextBlock(&ctx, msg);
 243                 msg = (uint8_t*)msg + BLAKE_LARGE_BLOCKSIZE_B;
 244                 length_b -= BLAKE_LARGE_BLOCKSIZE;
 245         }
 246         blake_large_lastBlock(&ctx, msg, length_b);
 247         blake512_ctx2hash(dest, &ctx);
 248 }
 249
 250 void blake384(void* dest, const void* msg, uint32_t length_b){
 251         blake_large_ctx_t ctx;
 252         blake384_init(&ctx);
 253         while(length_b>=BLAKE_LARGE_BLOCKSIZE){
 254                 blake_large_nextBlock(&ctx, msg);
 255                 msg = (uint8_t*)msg + BLAKE_LARGE_BLOCKSIZE_B;
 256                 length_b -= BLAKE_LARGE_BLOCKSIZE;
 257         }
 258         blake_large_lastBlock(&ctx, msg, length_b);
 259         blake384_ctx2hash(dest, &ctx);
 260 }