6937d41a02
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@23815 ec53bebd-3082-4978-b11e-865c3cabbd6b
119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
/*
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* Copyright (c) 2007 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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RCSID("$Id: aes.c 20466 2007-04-20 08:29:05Z lha $");
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#endif
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#ifdef KRB5
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#include <krb5-types.h>
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#endif
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#include <string.h>
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#include "camellia-ntt.h"
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#include "camellia.h"
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int
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CAMELLIA_set_key(const unsigned char *userkey,
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const int bits, CAMELLIA_KEY *key)
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{
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key->bits = bits;
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Camellia_Ekeygen(bits, userkey, key->key);
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return 1;
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}
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void
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CAMELLIA_encrypt(const unsigned char *in, unsigned char *out,
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const CAMELLIA_KEY *key)
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{
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Camellia_EncryptBlock(key->bits, in, key->key, out);
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}
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void
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CAMELLIA_decrypt(const unsigned char *in, unsigned char *out,
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const CAMELLIA_KEY *key)
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{
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Camellia_DecryptBlock(key->bits, in, key->key, out);
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}
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void
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CAMELLIA_cbc_encrypt(const unsigned char *in, unsigned char *out,
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unsigned long size, const CAMELLIA_KEY *key,
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unsigned char *iv, int mode_encrypt)
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{
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unsigned char tmp[CAMELLIA_BLOCK_SIZE];
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int i;
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if (mode_encrypt) {
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while (size >= CAMELLIA_BLOCK_SIZE) {
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for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++)
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tmp[i] = in[i] ^ iv[i];
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CAMELLIA_encrypt(tmp, out, key);
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memcpy(iv, out, CAMELLIA_BLOCK_SIZE);
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size -= CAMELLIA_BLOCK_SIZE;
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in += CAMELLIA_BLOCK_SIZE;
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out += CAMELLIA_BLOCK_SIZE;
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}
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if (size) {
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for (i = 0; i < size; i++)
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tmp[i] = in[i] ^ iv[i];
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for (i = size; i < CAMELLIA_BLOCK_SIZE; i++)
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tmp[i] = iv[i];
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CAMELLIA_encrypt(tmp, out, key);
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memcpy(iv, out, CAMELLIA_BLOCK_SIZE);
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}
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} else {
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while (size >= CAMELLIA_BLOCK_SIZE) {
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memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
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CAMELLIA_decrypt(tmp, out, key);
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for (i = 0; i < CAMELLIA_BLOCK_SIZE; i++)
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out[i] ^= iv[i];
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memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE);
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size -= CAMELLIA_BLOCK_SIZE;
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in += CAMELLIA_BLOCK_SIZE;
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out += CAMELLIA_BLOCK_SIZE;
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}
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if (size) {
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memcpy(tmp, in, CAMELLIA_BLOCK_SIZE);
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CAMELLIA_decrypt(tmp, out, key);
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for (i = 0; i < size; i++)
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out[i] ^= iv[i];
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memcpy(iv, tmp, CAMELLIA_BLOCK_SIZE);
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}
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}
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}
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