crypto/openssl-0.9/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         uint32_t t32[UNITSIZE];
  73
  74
  75         assert(in && out && key && ivec);
  76         assert((CAMELLIA_ENCRYPT == enc)||(CAMELLIA_DECRYPT == enc));
  77
  78         if(((size_t)in) % ALIGN == 0
  79                 && ((size_t)out) % ALIGN == 0
  80                 && ((size_t)ivec) % ALIGN == 0)
  81                 {
  82                 if (CAMELLIA_ENCRYPT == enc)
  83                         {
  84                         while (len >= CAMELLIA_BLOCK_SIZE)
  85                                 {
  86                                 XOR4WORD2((uint32_t *)out,
  87                                         (uint32_t *)in, (uint32_t *)iv);
  88                                 key->enc(key->rd_key, (uint32_t *)out);
  89                                 iv = out;
  90                                 len -= CAMELLIA_BLOCK_SIZE;
  91                                 in += CAMELLIA_BLOCK_SIZE;
  92                                 out += CAMELLIA_BLOCK_SIZE;
  93                                 }
  94                         if (len)
  95                                 {
  96                                 for(n=0; n < len; ++n)
  97                                         out[n] = in[n] ^ iv[n];
  98                                 for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
  99                                         out[n] = iv[n];
 100                                 key->enc(key->rd_key, (uint32_t *)out);
 101                                 iv = out;
 102                                 }
 103                         memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
 104                         }
 105                 else if (in != out)
 106                         {
 107                         while (len >= CAMELLIA_BLOCK_SIZE)
 108                                 {
 109                                 memcpy(out,in,CAMELLIA_BLOCK_SIZE);
 110                                 key->dec(key->rd_key,(uint32_t *)out);
 111                                 XOR4WORD((uint32_t *)out, (uint32_t *)iv);
 112                                 iv = in;
 113                                 len -= CAMELLIA_BLOCK_SIZE;
 114                                 in  += CAMELLIA_BLOCK_SIZE;
 115                                 out += CAMELLIA_BLOCK_SIZE;
 116                                 }
 117                         if (len)
 118                                 {
 119                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 120                                 key->dec(key->rd_key, (uint32_t *)tmp);
 121                                 for(n=0; n < len; ++n)
 122                                         out[n] = tmp[n] ^ iv[n];
 123                                 iv = in;
 124                                 }
 125                         memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
 126                         }
 127                 else /* in == out */
 128                         {
 129                         while (len >= CAMELLIA_BLOCK_SIZE)
 130                                 {
 131                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 132                                 key->dec(key->rd_key, (uint32_t *)out);
 133                                 XOR4WORD((uint32_t *)out, (uint32_t *)ivec);
 134                                 memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);
 135                                 len -= CAMELLIA_BLOCK_SIZE;
 136                                 in += CAMELLIA_BLOCK_SIZE;
 137                                 out += CAMELLIA_BLOCK_SIZE;
 138                                 }
 139                         if (len)
 140                                 {
 141                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 142                                 key->dec(key->rd_key,(uint32_t *)out);
 143                                 for(n=0; n < len; ++n)
 144                                         out[n] ^= ivec[n];
 145                                 for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
 146                                         out[n] = tmp[n];
 147                                 memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);
 148                                 }
 149                         }
 150                 }
 151         else /* no aligned */
 152                 {
 153                 if (CAMELLIA_ENCRYPT == enc)
 154                         {
 155                         while (len >= CAMELLIA_BLOCK_SIZE)
 156                                 {
 157                                 for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)
 158                                         out[n] = in[n] ^ iv[n];
 159                                 memcpy(t32, out, CAMELLIA_BLOCK_SIZE);
 160                                 key->enc(key->rd_key, t32);
 161                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 162                                 iv = out;
 163                                 len -= CAMELLIA_BLOCK_SIZE;
 164                                 in += CAMELLIA_BLOCK_SIZE;
 165                                 out += CAMELLIA_BLOCK_SIZE;
 166                                 }
 167                         if (len)
 168                                 {
 169                                 for(n=0; n < len; ++n)
 170                                         out[n] = in[n] ^ iv[n];
 171                                 for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
 172                                         out[n] = iv[n];
 173                                 key->enc(key->rd_key, (uint32_t *)out);
 174                                 iv = out;
 175                                 }
 176                         memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
 177                         }
 178                 else if (in != out)
 179                         {
 180                         while (len >= CAMELLIA_BLOCK_SIZE)
 181                                 {
 182                                 memcpy(t32,in,CAMELLIA_BLOCK_SIZE);
 183                                 key->dec(key->rd_key,t32);
 184                                 memcpy(out,t32,CAMELLIA_BLOCK_SIZE);
 185                                 for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)
 186                                         out[n] ^= iv[n];
 187                                 iv = in;
 188                                 len -= CAMELLIA_BLOCK_SIZE;
 189                                 in  += CAMELLIA_BLOCK_SIZE;
 190                                 out += CAMELLIA_BLOCK_SIZE;
 191                                 }
 192                         if (len)
 193                                 {
 194                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 195                                 memcpy(t32, in, CAMELLIA_BLOCK_SIZE);
 196                                 key->dec(key->rd_key, t32);
 197                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 198                                 for(n=0; n < len; ++n)
 199                                         out[n] = tmp[n] ^ iv[n];
 200                                 iv = in;
 201                                 }
 202                         memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
 203                         }
 204                 else
 205                         {
 206                         while (len >= CAMELLIA_BLOCK_SIZE)
 207                                 {
 208                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 209                                 memcpy(t32, in, CAMELLIA_BLOCK_SIZE);
 210                                 key->dec(key->rd_key, t32);
 211                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 212                                 for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)
 213                                         out[n] ^= ivec[n];
 214                                 memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);
 215                                 len -= CAMELLIA_BLOCK_SIZE;
 216                                 in += CAMELLIA_BLOCK_SIZE;
 217                                 out += CAMELLIA_BLOCK_SIZE;
 218                                 }
 219                         if (len)
 220                                 {
 221                                 memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
 222                                 memcpy(t32, in, CAMELLIA_BLOCK_SIZE);
 223                                 key->dec(key->rd_key,t32);
 224                                 memcpy(out, t32, CAMELLIA_BLOCK_SIZE);
 225                                 for(n=0; n < len; ++n)
 226                                         out[n] ^= ivec[n];
 227                                 for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
 228                                         out[n] = tmp[n];
 229                                 memcpy(ivec, tmp, CAMELLIA_BLOCK_SIZE);
 230                                 }
 231                         }
 232                 }
 233 }
 234