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/* camellia.h
*
* Copyright (C) 2006,2007
* NTT (Nippon Telegraph and Telephone Corporation).
*
* Copyright (C) 2010 Niels Möller
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef NETTLE_CAMELLIA_H_INCLUDED
#define NETTLE_CAMELLIA_H_INCLUDED
#include "nettle-types.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Name mangling */
#define camellia_set_encrypt_key nettle_camellia_set_encrypt_key
#define camellia_set_decrypt_key nettle_camellia_set_decrypt_key
#define camellia_invert_key nettle_camellia_invert_key
#define camellia_crypt nettle_camellia_crypt
#define camellia_crypt nettle_camellia_crypt
#define CAMELLIA_BLOCK_SIZE 16
/* Valid key sizes are 128, 192 or 256 bits (16, 24 or 32 bytes) */
#define CAMELLIA_MIN_KEY_SIZE 16
#define CAMELLIA_MAX_KEY_SIZE 32
#define CAMELLIA_KEY_SIZE 32
struct camellia_ctx
{
/* Number of subkeys. */
unsigned nkeys;
/* For 128-bit keys, there are 18 regular rounds, pre- and
post-whitening, and two FL and FLINV rounds, using a total of 26
subkeys, each of 64 bit. For 192- and 256-bit keys, there are 6
additional regular rounds and one additional FL and FLINV, using
a total of 34 subkeys. */
/* The clever combination of subkeys imply one of the pre- and
post-whitening keys is folded with the round keys, so that subkey
#1 and the last one (#25 or #33) is not used. The result is that
we have only 24 or 32 subkeys at the end of key setup. */
uint64_t keys[32];
};
void
camellia_set_encrypt_key(struct camellia_ctx *ctx,
size_t length, const uint8_t *key);
void
camellia_set_decrypt_key(struct camellia_ctx *ctx,
size_t length, const uint8_t *key);
void
camellia_invert_key(struct camellia_ctx *dst,
const struct camellia_ctx *src);
void
camellia_crypt(const struct camellia_ctx *ctx,
size_t length, uint8_t *dst,
const uint8_t *src);
#ifdef __cplusplus
}
#endif
#endif /* NETTLE_CAMELLIA_H_INCLUDED */
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