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/*
* Copyright (c) 2007 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "config.h"
#ifdef KRB5
#include <krb5-types.h>
#endif
#include <string.h>
#include "camellia-ntt.h"
#include "camellia.h"
#include <roken.h>
int
CAMELLIA_set_key(const unsigned char *userkey,
const int bits, CAMELLIA_KEY *key)
{
key->bits = bits;
Camellia_Ekeygen(bits, userkey, key->key);
return 1;
}
void
CAMELLIA_encrypt(const unsigned char *in, unsigned char *out,
const CAMELLIA_KEY *key)
{
Camellia_EncryptBlock(key->bits, in, key->key, out);
}
void
CAMELLIA_decrypt(const unsigned char *in, unsigned char *out,
const CAMELLIA_KEY *key)
{
Camellia_DecryptBlock(key->bits, in, key->key, out);
}
void
CAMELLIA_cbc_encrypt(const unsigned char *in, unsigned char *out,
unsigned long size, const CAMELLIA_KEY *key,
unsigned char *iv, int mode_encrypt)
{
unsigned char tmp[CAMELLIA_BLOCK_SIZE];
int i;
if (mode_encrypt) {
while (size >= CAMELLIA_BLOCK_SIZE) {
for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++)
tmp[i] = in[i] ^ iv[i];
CAMELLIA_encrypt(tmp, out, key);
memcpy(iv, out, CAMELLIA_BLOCK_SIZE);
size -= CAMELLIA_BLOCK_SIZE;
in += CAMELLIA_BLOCK_SIZE;
out += CAMELLIA_BLOCK_SIZE;
}
if (size) {
for (i = 0; i < size; i++)
tmp[i] = in[i] ^ iv[i];
for (i = size; i < CAMELLIA_BLOCK_SIZE; i++)
tmp[i] = iv[i];
CAMELLIA_encrypt(tmp, out, key);
memcpy(iv, out, CAMELLIA_BLOCK_SIZE);
}
} else {
while (size >= CAMELLIA_BLOCK_SIZE) {
memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
CAMELLIA_decrypt(tmp, out, key);
for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++)
out[i] ^= iv[i];
memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE);
size -= CAMELLIA_BLOCK_SIZE;
in += CAMELLIA_BLOCK_SIZE;
out += CAMELLIA_BLOCK_SIZE;
}
if (size) {
memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
CAMELLIA_decrypt(tmp, out, key);
for (i = 0; i < size; i++)
out[i] ^= iv[i];
memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE);
}
}
}
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