crypto/openssl/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
  69     unsigned long n;
  70     unsigned long len = length;
  71     const unsigned char *iv = ivec;
  72     union {
  73         u32 t32[CAMELLIA_BLOCK_SIZE / sizeof(u32)];
  74         u8 t8[CAMELLIA_BLOCK_SIZE];
  75     } tmp;
  76     const union {
  77         long one;
  78         char little;
  79     } camellia_endian = {
  80         1
  81     };
  82
  83     assert(in && out && key && ivec);
  84     assert((CAMELLIA_ENCRYPT == enc) || (CAMELLIA_DECRYPT == enc));
  85
  86     if (((size_t)in | (size_t)out | (size_t)ivec) % sizeof(u32) == 0) {
  87         if (CAMELLIA_ENCRYPT == enc) {
  88             while (len >= CAMELLIA_BLOCK_SIZE) {
  89                 XOR4WORD2((u32 *)out, (u32 *)in, (u32 *)iv);
  90                 if (camellia_endian.little)
  91                     SWAP4WORD((u32 *)out);
  92                 key->enc(key->rd_key, (u32 *)out);
  93                 if (camellia_endian.little)
  94                     SWAP4WORD((u32 *)out);
  95                 iv = out;
  96                 len -= CAMELLIA_BLOCK_SIZE;
  97                 in += CAMELLIA_BLOCK_SIZE;
  98                 out += CAMELLIA_BLOCK_SIZE;
  99             }
 100             if (len) {
 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         } else if (in != out) {
 114             while (len >= CAMELLIA_BLOCK_SIZE) {
 115                 memcpy(out, in, CAMELLIA_BLOCK_SIZE);
 116                 if (camellia_endian.little)
 117                     SWAP4WORD((u32 *)out);
 118                 key->dec(key->rd_key, (u32 *)out);
 119                 if (camellia_endian.little)
 120                     SWAP4WORD((u32 *)out);
 121                 XOR4WORD((u32 *)out, (u32 *)iv);
 122                 iv = in;
 123                 len -= CAMELLIA_BLOCK_SIZE;
 124                 in += CAMELLIA_BLOCK_SIZE;
 125                 out += CAMELLIA_BLOCK_SIZE;
 126             }
 127             if (len) {
 128                 memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
 129                 if (camellia_endian.little)
 130                     SWAP4WORD(tmp.t32);
 131                 key->dec(key->rd_key, tmp.t32);
 132                 if (camellia_endian.little)
 133                     SWAP4WORD(tmp.t32);
 134                 for (n = 0; n < len; ++n)
 135                     out[n] = tmp.t8[n] ^ iv[n];
 136                 iv = in;
 137             }
 138             memcpy(ivec, iv, CAMELLIA_BLOCK_SIZE);
 139         } else {                /* in == out */
 140
 141             while (len >= CAMELLIA_BLOCK_SIZE) {
 142                 memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
 143                 if (camellia_endian.little)
 144                     SWAP4WORD((u32 *)out);
 145                 key->dec(key->rd_key, (u32 *)out);
 146                 if (camellia_endian.little)
 147                     SWAP4WORD((u32 *)out);
 148                 XOR4WORD((u32 *)out, (u32 *)ivec);
 149                 memcpy(ivec, tmp.t8, CAMELLIA_BLOCK_SIZE);
 150                 len -= CAMELLIA_BLOCK_SIZE;
 151                 in += CAMELLIA_BLOCK_SIZE;
 152                 out += CAMELLIA_BLOCK_SIZE;
 153             }
 154             if (len) {
 155                 memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
 156                 if (camellia_endian.little)
 157                     SWAP4WORD((u32 *)out);
 158                 key->dec(key->rd_key, (u32 *)out);
 159                 if (camellia_endian.little)
 160                     SWAP4WORD((u32 *)out);
 161                 for (n = 0; n < len; ++n)
 162                     out[n] ^= ivec[n];
 163                 for (n = len; n < CAMELLIA_BLOCK_SIZE; ++n)
 164                     out[n] = tmp.t8[n];
 165                 memcpy(ivec, tmp.t8, CAMELLIA_BLOCK_SIZE);
 166             }
 167         }
 168     } else {                    /* no aligned */
 169
 170         if (CAMELLIA_ENCRYPT == enc) {
 171             while (len >= CAMELLIA_BLOCK_SIZE) {
 172                 for (n = 0; n < CAMELLIA_BLOCK_SIZE; ++n)
 173                     tmp.t8[n] = in[n] ^ iv[n];
 174                 if (camellia_endian.little)
 175                     SWAP4WORD(tmp.t32);
 176                 key->enc(key->rd_key, tmp.t32);
 177                 if (camellia_endian.little)
 178                     SWAP4WORD(tmp.t32);
 179                 memcpy(out, tmp.t8, CAMELLIA_BLOCK_SIZE);
 180                 iv = out;
 181                 len -= CAMELLIA_BLOCK_SIZE;
 182                 in += CAMELLIA_BLOCK_SIZE;
 183                 out += CAMELLIA_BLOCK_SIZE;
 184             }
 185             if (len) {
 186                 for (n = 0; n < len; ++n)
 187                     tmp.t8[n] = in[n] ^ iv[n];
 188                 for (n = len; n < CAMELLIA_BLOCK_SIZE; ++n)
 189                     tmp.t8[n] = iv[n];
 190                 if (camellia_endian.little)
 191                     SWAP4WORD(tmp.t32);
 192                 key->enc(key->rd_key, tmp.t32);
 193                 if (camellia_endian.little)
 194                     SWAP4WORD(tmp.t32);
 195                 memcpy(out, tmp.t8, CAMELLIA_BLOCK_SIZE);
 196                 iv = out;
 197             }
 198             memcpy(ivec, iv, CAMELLIA_BLOCK_SIZE);
 199         } else if (in != out) {
 200             while (len >= CAMELLIA_BLOCK_SIZE) {
 201                 memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
 202                 if (camellia_endian.little)
 203                     SWAP4WORD(tmp.t32);
 204                 key->dec(key->rd_key, tmp.t32);
 205                 if (camellia_endian.little)
 206                     SWAP4WORD(tmp.t32);
 207                 for (n = 0; n < CAMELLIA_BLOCK_SIZE; ++n)
 208                     out[n] = tmp.t8[n] ^ iv[n];
 209                 iv = in;
 210                 len -= CAMELLIA_BLOCK_SIZE;
 211                 in += CAMELLIA_BLOCK_SIZE;
 212                 out += CAMELLIA_BLOCK_SIZE;
 213             }
 214             if (len) {
 215                 memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
 216                 if (camellia_endian.little)
 217                     SWAP4WORD(tmp.t32);
 218                 key->dec(key->rd_key, tmp.t32);
 219                 if (camellia_endian.little)
 220                     SWAP4WORD(tmp.t32);
 221                 for (n = 0; n < len; ++n)
 222                     out[n] = tmp.t8[n] ^ iv[n];
 223                 iv = in;
 224             }
 225             memcpy(ivec, iv, CAMELLIA_BLOCK_SIZE);
 226         } else {
 227             while (len >= CAMELLIA_BLOCK_SIZE) {
 228                 memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
 229                 if (camellia_endian.little)
 230                     SWAP4WORD(tmp.t32);
 231                 key->dec(key->rd_key, tmp.t32);
 232                 if (camellia_endian.little)
 233                     SWAP4WORD(tmp.t32);
 234                 for (n = 0; n < CAMELLIA_BLOCK_SIZE; ++n)
 235                     tmp.t8[n] ^= ivec[n];
 236                 memcpy(ivec, in, CAMELLIA_BLOCK_SIZE);
 237                 memcpy(out, tmp.t8, CAMELLIA_BLOCK_SIZE);
 238                 len -= CAMELLIA_BLOCK_SIZE;
 239                 in += CAMELLIA_BLOCK_SIZE;
 240                 out += CAMELLIA_BLOCK_SIZE;
 241             }
 242             if (len) {
 243                 memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
 244                 if (camellia_endian.little)
 245                     SWAP4WORD(tmp.t32);
 246                 key->dec(key->rd_key, tmp.t32);
 247                 if (camellia_endian.little)
 248                     SWAP4WORD(tmp.t32);
 249                 for (n = 0; n < len; ++n)
 250                     tmp.t8[n] ^= ivec[n];
 251                 memcpy(ivec, in, CAMELLIA_BLOCK_SIZE);
 252                 memcpy(out, tmp.t8, len);
 253             }
 254         }
 255     }
 256 }