Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2007 Kungliga Tekniska Högskolan
       3             :  * (Royal Institute of Technology, Stockholm, Sweden).
       4             :  * All rights reserved.
       5             :  *
       6             :  * Redistribution and use in source and binary forms, with or without
       7             :  * modification, are permitted provided that the following conditions
       8             :  * are met:
       9             :  *
      10             :  * 1. Redistributions of source code must retain the above copyright
      11             :  *    notice, this list of conditions and the following disclaimer.
      12             :  *
      13             :  * 2. Redistributions in binary form must reproduce the above copyright
      14             :  *    notice, this list of conditions and the following disclaimer in the
      15             :  *    documentation and/or other materials provided with the distribution.
      16             :  *
      17             :  * 3. Neither the name of the Institute nor the names of its contributors
      18             :  *    may be used to endorse or promote products derived from this software
      19             :  *    without specific prior written permission.
      20             :  *
      21             :  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
      22             :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23             :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24             :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
      25             :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26             :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27             :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28             :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29             :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30             :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31             :  * SUCH DAMAGE.
      32             :  */
      33             : 
      34             : #include <config.h>
      35             : #include <roken.h>
      36             : 
      37             : #ifdef KRB5
      38             : #include <krb5-types.h>
      39             : #endif
      40             : 
      41             : #include "camellia-ntt.h"
      42             : #include "camellia.h"
      43             : 
      44             : int
      45           0 : CAMELLIA_set_key(const unsigned char *userkey,
      46             :                  const int bits, CAMELLIA_KEY *key)
      47             : {
      48           0 :     key->bits = bits;
      49           0 :     Camellia_Ekeygen(bits, userkey, key->key);
      50           0 :     return 1;
      51             : }
      52             : 
      53             : void
      54           0 : CAMELLIA_encrypt(const unsigned char *in, unsigned char *out,
      55             :                  const CAMELLIA_KEY *key)
      56             : {
      57           0 :     Camellia_EncryptBlock(key->bits, in, key->key, out);
      58             : 
      59           0 : }
      60             : 
      61             : void
      62           0 : CAMELLIA_decrypt(const unsigned char *in, unsigned char *out,
      63             :                  const CAMELLIA_KEY *key)
      64             : {
      65           0 :     Camellia_DecryptBlock(key->bits, in, key->key, out);
      66           0 : }
      67             : 
      68             : void
      69           0 : CAMELLIA_cbc_encrypt(const unsigned char *in, unsigned char *out,
      70             :                      unsigned long size, const CAMELLIA_KEY *key,
      71             :                      unsigned char *iv, int mode_encrypt)
      72             : {
      73           0 :     unsigned char tmp[CAMELLIA_BLOCK_SIZE];
      74           0 :     int i;
      75             : 
      76           0 :     if (mode_encrypt) {
      77           0 :         while (size >= CAMELLIA_BLOCK_SIZE) {
      78           0 :             for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++)
      79           0 :                 tmp[i] = in[i] ^ iv[i];
      80           0 :             CAMELLIA_encrypt(tmp, out, key);
      81           0 :             memcpy(iv, out, CAMELLIA_BLOCK_SIZE);
      82           0 :             size -= CAMELLIA_BLOCK_SIZE;
      83           0 :             in += CAMELLIA_BLOCK_SIZE;
      84           0 :             out += CAMELLIA_BLOCK_SIZE;
      85             :         }
      86           0 :         if (size) {
      87           0 :             for (i = 0; i < size; i++)
      88           0 :                 tmp[i] = in[i] ^ iv[i];
      89           0 :             for (i = size; i < CAMELLIA_BLOCK_SIZE; i++)
      90           0 :                 tmp[i] = iv[i];
      91           0 :             CAMELLIA_encrypt(tmp, out, key);
      92           0 :             memcpy(iv, out, CAMELLIA_BLOCK_SIZE);
      93             :         }
      94             :     } else {
      95           0 :         while (size >= CAMELLIA_BLOCK_SIZE) {
      96           0 :             memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
      97           0 :             CAMELLIA_decrypt(tmp, out, key);
      98           0 :             for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++)
      99           0 :                 out[i] ^= iv[i];
     100           0 :             memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE);
     101           0 :             size -= CAMELLIA_BLOCK_SIZE;
     102           0 :             in += CAMELLIA_BLOCK_SIZE;
     103           0 :             out += CAMELLIA_BLOCK_SIZE;
     104             :         }
     105           0 :         if (size) {
     106           0 :             memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
     107           0 :             CAMELLIA_decrypt(tmp, out, key);
     108           0 :             for (i = 0; i < size; i++)
     109           0 :                 out[i] ^= iv[i];
     110           0 :             memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE);
     111             :         }
     112             :     }
     113           0 : }