/* crypto/camellia/camellia_cbc.c -*- mode:C; c-file-style: "eay" -*- */
/* ====================================================================
* Copyright (c) 2006 The OpenSSL Project. 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. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS 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.
* ====================================================================
*
*/
#ifndef CAMELLIA_DEBUG
# ifndef NDEBUG
# define NDEBUG
# endif
#endif
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <openssl/camellia.h>
#include "cmll_locl.h"
void Camellia_cbc_encrypt(const unsigned char *in, unsigned char *out,
const unsigned long length, const CAMELLIA_KEY *key,
unsigned char *ivec, const int enc) {
unsigned long n;
unsigned long len = length;
const unsigned char *iv = ivec;
union { u32 t32[CAMELLIA_BLOCK_SIZE/sizeof(u32)];
u8 t8 [CAMELLIA_BLOCK_SIZE]; } tmp;
const union { long one; char little; } camellia_endian = {1};
assert(in && out && key && ivec);
assert((CAMELLIA_ENCRYPT == enc)||(CAMELLIA_DECRYPT == enc));
if(((size_t)in|(size_t)out|(size_t)ivec) % sizeof(u32) == 0)
{
if (CAMELLIA_ENCRYPT == enc)
{
while (len >= CAMELLIA_BLOCK_SIZE)
{
XOR4WORD2((u32 *)out,
(u32 *)in, (u32 *)iv);
if (camellia_endian.little)
SWAP4WORD((u32 *)out);
key->enc(key->rd_key, (u32 *)out);
if (camellia_endian.little)
SWAP4WORD((u32 *)out);
iv = out;
len -= CAMELLIA_BLOCK_SIZE;
in += CAMELLIA_BLOCK_SIZE;
out += CAMELLIA_BLOCK_SIZE;
}
if (len)
{
for(n=0; n < len; ++n)
out[n] = in[n] ^ iv[n];
for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
out[n] = iv[n];
if (camellia_endian.little)
SWAP4WORD((u32 *)out);
key->enc(key->rd_key, (u32 *)out);
if (camellia_endian.little)
SWAP4WORD((u32 *)out);
iv = out;
}
memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
}
else if (in != out)
{
while (len >= CAMELLIA_BLOCK_SIZE)
{
memcpy(out,in,CAMELLIA_BLOCK_SIZE);
if (camellia_endian.little)
SWAP4WORD((u32 *)out);
key->dec(key->rd_key,(u32 *)out);
if (camellia_endian.little)
SWAP4WORD((u32 *)out);
XOR4WORD((u32 *)out, (u32 *)iv);
iv = in;
len -= CAMELLIA_BLOCK_SIZE;
in += CAMELLIA_BLOCK_SIZE;
out += CAMELLIA_BLOCK_SIZE;
}
if (len)
{
memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
key->dec(key->rd_key, tmp.t32);
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
for(n=0; n < len; ++n)
out[n] = tmp.t8[n] ^ iv[n];
iv = in;
}
memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
}
else /* in == out */
{
while (len >= CAMELLIA_BLOCK_SIZE)
{
memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
if (camellia_endian.little)
SWAP4WORD((u32 *)out);
key->dec(key->rd_key, (u32 *)out);
if (camellia_endian.little)
SWAP4WORD((u32 *)out);
XOR4WORD((u32 *)out, (u32 *)ivec);
memcpy(ivec, tmp.t8, CAMELLIA_BLOCK_SIZE);
len -= CAMELLIA_BLOCK_SIZE;
in += CAMELLIA_BLOCK_SIZE;
out += CAMELLIA_BLOCK_SIZE;
}
if (len)
{
memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
if (camellia_endian.little)
SWAP4WORD((u32 *)out);
key->dec(key->rd_key,(u32 *)out);
if (camellia_endian.little)
SWAP4WORD((u32 *)out);
for(n=0; n < len; ++n)
out[n] ^= ivec[n];
for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
out[n] = tmp.t8[n];
memcpy(ivec, tmp.t8, CAMELLIA_BLOCK_SIZE);
}
}
}
else /* no aligned */
{
if (CAMELLIA_ENCRYPT == enc)
{
while (len >= CAMELLIA_BLOCK_SIZE)
{
for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)
tmp.t8[n] = in[n] ^ iv[n];
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
key->enc(key->rd_key, tmp.t32);
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
memcpy(out, tmp.t8, CAMELLIA_BLOCK_SIZE);
iv = out;
len -= CAMELLIA_BLOCK_SIZE;
in += CAMELLIA_BLOCK_SIZE;
out += CAMELLIA_BLOCK_SIZE;
}
if (len)
{
for(n=0; n < len; ++n)
tmp.t8[n] = in[n] ^ iv[n];
for(n=len; n < CAMELLIA_BLOCK_SIZE; ++n)
tmp.t8[n] = iv[n];
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
key->enc(key->rd_key, tmp.t32);
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
memcpy(out, tmp.t8, CAMELLIA_BLOCK_SIZE);
iv = out;
}
memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
}
else if (in != out)
{
while (len >= CAMELLIA_BLOCK_SIZE)
{
memcpy(tmp.t8,in,CAMELLIA_BLOCK_SIZE);
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
key->dec(key->rd_key,tmp.t32);
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)
out[n] = tmp.t8[n] ^ iv[n];
iv = in;
len -= CAMELLIA_BLOCK_SIZE;
in += CAMELLIA_BLOCK_SIZE;
out += CAMELLIA_BLOCK_SIZE;
}
if (len)
{
memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
key->dec(key->rd_key, tmp.t32);
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
for(n=0; n < len; ++n)
out[n] = tmp.t8[n] ^ iv[n];
iv = in;
}
memcpy(ivec,iv,CAMELLIA_BLOCK_SIZE);
}
else
{
while (len >= CAMELLIA_BLOCK_SIZE)
{
memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
key->dec(key->rd_key, tmp.t32);
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
for(n=0; n < CAMELLIA_BLOCK_SIZE; ++n)
tmp.t8[n] ^= ivec[n];
memcpy(ivec, in, CAMELLIA_BLOCK_SIZE);
memcpy(out, tmp.t8, CAMELLIA_BLOCK_SIZE);
len -= CAMELLIA_BLOCK_SIZE;
in += CAMELLIA_BLOCK_SIZE;
out += CAMELLIA_BLOCK_SIZE;
}
if (len)
{
memcpy(tmp.t8, in, CAMELLIA_BLOCK_SIZE);
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
key->dec(key->rd_key,tmp.t32);
if (camellia_endian.little)
SWAP4WORD(tmp.t32);
for(n=0; n < len; ++n)
tmp.t8[n] ^= ivec[n];
memcpy(ivec, in, CAMELLIA_BLOCK_SIZE);
memcpy(out,tmp.t8,len);
}
}
}
}
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