crypto/camellia/cmll_cbc.c

   1 /* crypto/camellia/camellia_cbc.c -*- mode:C; c-file-style: "eay" -*- */
   2 /* ====================================================================
   3  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the
  15  *    distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this
  18  *    software must display the following acknowledgment:
  19  *    "This product includes software developed by the OpenSSL Project
  20  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  21  *
  22  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  23  *    endorse or promote products derived from this software without
  24  *    prior written permission. For written permission, please contact
  25  *    openssl-core@openssl.org.
  26  *
  27  * 5. Products derived from this software may not be called "OpenSSL"
  28  *    nor may "OpenSSL" appear in their names without prior written
  29  *    permission of the OpenSSL Project.
  30  *
  31  * 6. Redistributions of any form whatsoever must retain the following
  32  *    acknowledgment:
  33  *    "This product includes software developed by the OpenSSL Project
  34  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  37  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  39  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  42  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  43  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  44  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  45  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  46  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  47  * OF THE POSSIBILITY OF SUCH DAMAGE.
  48  * ====================================================================
  49  *
  50  */
  51
  52 #ifndef CAMELLIA_DEBUG
  53 # ifndef NDEBUG
  54 #  define NDEBUG
  55 # endif
  56 #endif
  57 #include <assert.h>
  58 #include <stdio.h>
  59 #include <string.h>
  60
  61 #include <openssl/camellia.h>
  62 #include "cmll_locl.h"
  63
  64 void Camellia_cbc_encrypt(const unsigned char *in, unsigned char *out,
  65                      const unsigned long length, const CAMELLIA_KEY *key,
  66                      unsigned char *ivec, const int enc) {
  67
  68         unsigned long n;
  69         unsigned long len = length;
  70         unsigned char tmp[CAMELLIA_BLOCK_SIZE];
  71         const unsigned char *iv = ivec;
  72         u32 t32[CAMELLIA_BLOCK_SIZE/sizeof(u32)];
  73         const union { long one; char little; } camellia_endian = {1};
  74
  75
  76         assert(in && out && key && ivec);
  77         assert((CAMELLIA_ENCRYPT == enc)||(CAMELLIA_DECRYPT == enc));
  78
  79         if(((size_t)in|(size_t)out|(size_t)ivec) % sizeof(u32) == 0)
  80                 {
  81                 if (CAMELLIA_ENCRYPT == enc)
  82                         {
  83                         while (len >= CAMELLIA_BLOCK_SIZE)
  84                                 {
  85                                 XOR4WORD2((u32 *)out,
  86                                         (u32 *)in, (u32 *)iv);
  87                                 if (camellia_endian.little)
  88                                         SWAP4WORD((u32 *)out);
  89                                 key->enc(key->rd_key, (u32 *)out);
  90                                 if (camellia_endian.little)
  91                                         SWAP4WORD((u32 *)out);
  92                                 iv = out;
  93                                 len -= CAMELLIA_BLOCK_SIZE;
  94                                 in += CAMELLIA_BLOCK_SIZE;
  95                                 out += CAMELLIA_BLOCK_SIZE;
  96                                 }
  97                         if (len)
  98                                 {
  99                                 for(n=0; n < len; ++n)
 100                                         out[n] = in[n] ^ iv[n];
 101                                 for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
 102                                         out[n] = iv[n];
 103                                 if (camellia_endian.little)
 104                                         SWAP4WORD((u32 *)out);
 105                                 key->enc(key->rd_key, (u32 *)out);
 106                                 if (camellia_endian.little)
 107                                         SWAP4WORD((u32 *)out);
 108                                 iv = out;
 109                                 }
 110                         memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
 111                         }
 112                 else if (in != out)
 113                         {
 114                         while (len >= CAMELLIA_BLOCK_SIZE)
 115                                 {
 116                                 memcpy(out,in,CAMELLIA_BLOCK_SIZE);
 117                                 if (camellia_endian.little)
 118                                         SWAP4WORD((u32 *)out);
 119                                 key->dec(key->rd_key,(u32 *)out);
 120                                 if (camellia_endian.little)
 121                                         SWAP4WORD((u32 *)out);
 122                                 XOR4WORD((u32 *)out, (u32 *)iv);
 123                                 iv = in;
 124                                 len -= CAMELLIA_BLOCK_SIZE;
 125                                 in  += CAMELLIA_BLOCK_SIZE;
 126                                 out += CAMELLIA_BLOCK_SIZE;
 127                                 }
 128                         if (len)
 129                                 {
 130                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 131                                 if (camellia_endian.little)
 132                                         SWAP4WORD((u32 *)tmp);
 133                                 key->dec(key->rd_key, (u32 *)tmp);
 134                                 if (camellia_endian.little)
 135                                         SWAP4WORD((u32 *)tmp);
 136                                 for(n=0; n < len; ++n)
 137                                         out[n] = tmp[n] ^ iv[n];
 138                                 iv = in;
 139                                 }
 140                         memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
 141                         }
 142                 else /* in == out */
 143                         {
 144                         while (len >= CAMELLIA_BLOCK_SIZE)
 145                                 {
 146                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 147                                 if (camellia_endian.little)
 148                                         SWAP4WORD((u32 *)out);
 149                                 key->dec(key->rd_key, (u32 *)out);
 150                                 if (camellia_endian.little)
 151                                         SWAP4WORD((u32 *)out);
 152                                 XOR4WORD((u32 *)out, (u32 *)ivec);
 153                                 memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);
 154                                 len -= CAMELLIA_BLOCK_SIZE;
 155                                 in += CAMELLIA_BLOCK_SIZE;
 156                                 out += CAMELLIA_BLOCK_SIZE;
 157                                 }
 158                         if (len)
 159                                 {
 160                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 161                                 if (camellia_endian.little)
 162                                         SWAP4WORD((u32 *)out);
 163                                 key->dec(key->rd_key,(u32 *)out);
 164                                 if (camellia_endian.little)
 165                                         SWAP4WORD((u32 *)out);
 166                                 for(n=0; n < len; ++n)
 167                                         out[n] ^= ivec[n];
 168                                 for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
 169                                         out[n] = tmp[n];
 170                                 memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);
 171                                 }
 172                         }
 173                 }
 174         else /* no aligned */
 175                 {
 176                 if (CAMELLIA_ENCRYPT == enc)
 177                         {
 178                         while (len >= CAMELLIA_BLOCK_SIZE)
 179                                 {
 180                                 for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)
 181                                         out[n] = in[n] ^ iv[n];
 182                                 memcpy(t32, out, CAMELLIA_BLOCK_SIZE);
 183                                 if (camellia_endian.little)
 184                                         SWAP4WORD(t32);
 185                                 key->enc(key->rd_key, t32);
 186                                 if (camellia_endian.little)
 187                                         SWAP4WORD(t32);
 188                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 189                                 iv = out;
 190                                 len -= CAMELLIA_BLOCK_SIZE;
 191                                 in += CAMELLIA_BLOCK_SIZE;
 192                                 out += CAMELLIA_BLOCK_SIZE;
 193                                 }
 194                         if (len)
 195                                 {
 196                                 for(n=0; n < len; ++n)
 197                                         out[n] = in[n] ^ iv[n];
 198                                 for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
 199                                         out[n] = iv[n];
 200                                 memcpy(t32, out, CAMELLIA_BLOCK_SIZE);
 201                                 if (camellia_endian.little)
 202                                         SWAP4WORD(t32);
 203                                 key->enc(key->rd_key, t32);
 204                                 if (camellia_endian.little)
 205                                         SWAP4WORD(t32);
 206                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 207                                 iv = out;
 208                                 }
 209                         memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
 210                         }
 211                 else if (in != out)
 212                         {
 213                         while (len >= CAMELLIA_BLOCK_SIZE)
 214                                 {
 215                                 memcpy(t32,in,CAMELLIA_BLOCK_SIZE);
 216                                 if (camellia_endian.little)
 217                                         SWAP4WORD(t32);
 218                                 key->dec(key->rd_key,t32);
 219                                 if (camellia_endian.little)
 220                                         SWAP4WORD(t32);
 221                                 memcpy(out,t32,CAMELLIA_BLOCK_SIZE);
 222                                 for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)
 223                                         out[n] ^= iv[n];
 224                                 iv = in;
 225                                 len -= CAMELLIA_BLOCK_SIZE;
 226                                 in  += CAMELLIA_BLOCK_SIZE;
 227                                 out += CAMELLIA_BLOCK_SIZE;
 228                                 }
 229                         if (len)
 230                                 {
 231                                 memcpy(t32, in, CAMELLIA_BLOCK_SIZE);
 232                                 if (camellia_endian.little)
 233                                         SWAP4WORD(t32);
 234                                 key->dec(key->rd_key, t32);
 235                                 if (camellia_endian.little)
 236                                         SWAP4WORD(t32);
 237                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 238                                 for(n=0; n < len; ++n)
 239                                         out[n] ^= iv[n];
 240                                 iv = in;
 241                                 }
 242                         memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
 243                         }
 244                 else
 245                         {
 246                         while (len >= CAMELLIA_BLOCK_SIZE)
 247                                 {
 248                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 249                                 memcpy(t32, in, CAMELLIA_BLOCK_SIZE);
 250                                 if (camellia_endian.little)
 251                                         SWAP4WORD(t32);
 252                                 key->dec(key->rd_key, t32);
 253                                 if (camellia_endian.little)
 254                                         SWAP4WORD(t32);
 255                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 256                                 for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)
 257                                         out[n] ^= ivec[n];
 258                                 memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);
 259                                 len -= CAMELLIA_BLOCK_SIZE;
 260                                 in += CAMELLIA_BLOCK_SIZE;
 261                                 out += CAMELLIA_BLOCK_SIZE;
 262                                 }
 263                         if (len)
 264                                 {
 265                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 266                                 memcpy(t32, in, CAMELLIA_BLOCK_SIZE);
 267                                 if (camellia_endian.little)
 268                                         SWAP4WORD(t32);
 269                                 key->dec(key->rd_key,t32);
 270                                 if (camellia_endian.little)
 271                                         SWAP4WORD(t32);
 272                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 273                                 for(n=0; n < len; ++n)
 274                                         out[n] ^= ivec[n];
 275                                 for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
 276                                         out[n] = tmp[n];
 277                                 memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);
 278                                 }
 279                         }
 280                 }
 281 }