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[UNITSIZE];
  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) % ALIGN == 0
  80                 && ((size_t)out) % ALIGN == 0
  81                 && ((size_t)ivec) % ALIGN == 0)
  82                 {
  83                 if (CAMELLIA_ENCRYPT == enc)
  84                         {
  85                         while (len >= CAMELLIA_BLOCK_SIZE)
  86                                 {
  87                                 XOR4WORD2((u32 *)out,
  88                                         (u32 *)in, (u32 *)iv);
  89                                 if (camellia_endian.little)
  90                                         SWAP4WORD((u32 *)out);
  91                                 key->enc(key->rd_key, (u32 *)out);
  92                                 if (camellia_endian.little)
  93                                         SWAP4WORD((u32 *)out);
  94                                 iv = out;
  95                                 len -= CAMELLIA_BLOCK_SIZE;
  96                                 in += CAMELLIA_BLOCK_SIZE;
  97                                 out += CAMELLIA_BLOCK_SIZE;
  98                                 }
  99                         if (len)
 100                                 {
 101                                 for(n=0; n < len; ++n)
 102                                         out[n] = in[n] ^ iv[n];
 103                                 for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
 104                                         out[n] = iv[n];
 105                                 if (camellia_endian.little)
 106                                         SWAP4WORD((u32 *)out);
 107                                 key->enc(key->rd_key, (u32 *)out);
 108                                 if (camellia_endian.little)
 109                                         SWAP4WORD((u32 *)out);
 110                                 iv = out;
 111                                 }
 112                         memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
 113                         }
 114                 else if (in != out)
 115                         {
 116                         while (len >= CAMELLIA_BLOCK_SIZE)
 117                                 {
 118                                 memcpy(out,in,CAMELLIA_BLOCK_SIZE);
 119                                 if (camellia_endian.little)
 120                                         SWAP4WORD((u32 *)out);
 121                                 key->dec(key->rd_key,(u32 *)out);
 122                                 if (camellia_endian.little)
 123                                         SWAP4WORD((u32 *)out);
 124                                 XOR4WORD((u32 *)out, (u32 *)iv);
 125                                 iv = in;
 126                                 len -= CAMELLIA_BLOCK_SIZE;
 127                                 in  += CAMELLIA_BLOCK_SIZE;
 128                                 out += CAMELLIA_BLOCK_SIZE;
 129                                 }
 130                         if (len)
 131                                 {
 132                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 133                                 if (camellia_endian.little)
 134                                         SWAP4WORD((u32 *)tmp);
 135                                 key->dec(key->rd_key, (u32 *)tmp);
 136                                 if (camellia_endian.little)
 137                                         SWAP4WORD((u32 *)tmp);
 138                                 for(n=0; n < len; ++n)
 139                                         out[n] = tmp[n] ^ iv[n];
 140                                 iv = in;
 141                                 }
 142                         memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
 143                         }
 144                 else /* in == out */
 145                         {
 146                         while (len >= CAMELLIA_BLOCK_SIZE)
 147                                 {
 148                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 149                                 if (camellia_endian.little)
 150                                         SWAP4WORD((u32 *)out);
 151                                 key->dec(key->rd_key, (u32 *)out);
 152                                 if (camellia_endian.little)
 153                                         SWAP4WORD((u32 *)out);
 154                                 XOR4WORD((u32 *)out, (u32 *)ivec);
 155                                 memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);
 156                                 len -= CAMELLIA_BLOCK_SIZE;
 157                                 in += CAMELLIA_BLOCK_SIZE;
 158                                 out += CAMELLIA_BLOCK_SIZE;
 159                                 }
 160                         if (len)
 161                                 {
 162                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 163                                 if (camellia_endian.little)
 164                                         SWAP4WORD((u32 *)out);
 165                                 key->dec(key->rd_key,(u32 *)out);
 166                                 if (camellia_endian.little)
 167                                         SWAP4WORD((u32 *)out);
 168                                 for(n=0; n < len; ++n)
 169                                         out[n] ^= ivec[n];
 170                                 for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
 171                                         out[n] = tmp[n];
 172                                 memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);
 173                                 }
 174                         }
 175                 }
 176         else /* no aligned */
 177                 {
 178                 if (CAMELLIA_ENCRYPT == enc)
 179                         {
 180                         while (len >= CAMELLIA_BLOCK_SIZE)
 181                                 {
 182                                 for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)
 183                                         out[n] = in[n] ^ iv[n];
 184                                 memcpy(t32, out, CAMELLIA_BLOCK_SIZE);
 185                                 if (camellia_endian.little)
 186                                         SWAP4WORD(t32);
 187                                 key->enc(key->rd_key, t32);
 188                                 if (camellia_endian.little)
 189                                         SWAP4WORD(t32);
 190                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 191                                 iv = out;
 192                                 len -= CAMELLIA_BLOCK_SIZE;
 193                                 in += CAMELLIA_BLOCK_SIZE;
 194                                 out += CAMELLIA_BLOCK_SIZE;
 195                                 }
 196                         if (len)
 197                                 {
 198                                 for(n=0; n < len; ++n)
 199                                         out[n] = in[n] ^ iv[n];
 200                                 for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
 201                                         out[n] = iv[n];
 202                                 memcpy(t32, out, CAMELLIA_BLOCK_SIZE);
 203                                 if (camellia_endian.little)
 204                                         SWAP4WORD(t32);
 205                                 key->enc(key->rd_key, t32);
 206                                 if (camellia_endian.little)
 207                                         SWAP4WORD(t32);
 208                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 209                                 iv = out;
 210                                 }
 211                         memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
 212                         }
 213                 else if (in != out)
 214                         {
 215                         while (len >= CAMELLIA_BLOCK_SIZE)
 216                                 {
 217                                 memcpy(t32,in,CAMELLIA_BLOCK_SIZE);
 218                                 if (camellia_endian.little)
 219                                         SWAP4WORD(t32);
 220                                 key->dec(key->rd_key,t32);
 221                                 if (camellia_endian.little)
 222                                         SWAP4WORD(t32);
 223                                 memcpy(out,t32,CAMELLIA_BLOCK_SIZE);
 224                                 for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)
 225                                         out[n] ^= iv[n];
 226                                 iv = in;
 227                                 len -= CAMELLIA_BLOCK_SIZE;
 228                                 in  += CAMELLIA_BLOCK_SIZE;
 229                                 out += CAMELLIA_BLOCK_SIZE;
 230                                 }
 231                         if (len)
 232                                 {
 233                                 memcpy(t32, in, CAMELLIA_BLOCK_SIZE);
 234                                 if (camellia_endian.little)
 235                                         SWAP4WORD(t32);
 236                                 key->dec(key->rd_key, t32);
 237                                 if (camellia_endian.little)
 238                                         SWAP4WORD(t32);
 239                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 240                                 for(n=0; n < len; ++n)
 241                                         out[n] ^= iv[n];
 242                                 iv = in;
 243                                 }
 244                         memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
 245                         }
 246                 else
 247                         {
 248                         while (len >= CAMELLIA_BLOCK_SIZE)
 249                                 {
 250                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 251                                 memcpy(t32, in, CAMELLIA_BLOCK_SIZE);
 252                                 if (camellia_endian.little)
 253                                         SWAP4WORD(t32);
 254                                 key->dec(key->rd_key, t32);
 255                                 if (camellia_endian.little)
 256                                         SWAP4WORD(t32);
 257                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 258                                 for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)
 259                                         out[n] ^= ivec[n];
 260                                 memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);
 261                                 len -= CAMELLIA_BLOCK_SIZE;
 262                                 in += CAMELLIA_BLOCK_SIZE;
 263                                 out += CAMELLIA_BLOCK_SIZE;
 264                                 }
 265                         if (len)
 266                                 {
 267                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 268                                 memcpy(t32, in, CAMELLIA_BLOCK_SIZE);
 269                                 if (camellia_endian.little)
 270                                         SWAP4WORD(t32);
 271                                 key->dec(key->rd_key,t32);
 272                                 if (camellia_endian.little)
 273                                         SWAP4WORD(t32);
 274                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 275                                 for(n=0; n < len; ++n)
 276                                         out[n] ^= ivec[n];
 277                                 for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
 278                                         out[n] = tmp[n];
 279                                 memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);
 280                                 }
 281                         }
 282                 }
 283 }
 284