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/* des-compat.h
*
* The des block cipher, libdes/openssl-style interface.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2001 Niels Möller
*
* The nettle 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.
*
* The nettle 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 the nettle library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
#ifndef NETTLE_DES_COMPAT_H_INCLUDED
#define NETTLE_DES_COMPAT_H_INCLUDED
/* According to Assar, des_set_key, des_set_key_odd_parity,
* des_is_weak_key, plus the encryption functions (des_*_encrypt and
* des_cbc_cksum) would be a pretty useful subset. */
/* NOTE: This is quite experimental, and not all functions are
* implemented. Contributions, in particular test cases are welcome. */
#include "des.h"
/* We use some name mangling, to avoid collisions with either other
* nettle functions or with libcrypto. */
#define des_ecb3_encrypt nettle_openssl_des_ecb3_encrypt
#define des_cbc_cksum nettle_openssl_des_cbc_cksum
#define des_ncbc_encrypt nettle_openssl_des_ncbc_encrypt
#define des_cbc_encrypt nettle_openssl_des_cbc_encrypt
#define des_ecb_encrypt nettle_openssl_des_ecb_encrypt
#define des_ede3_cbc_encrypt nettle_openssl_des_ede3_cbc_encrypt
#define des_set_odd_parity nettle_openssl_des_set_odd_parity
#define des_check_key nettle_openssl_des_check_key
#define des_key_sched nettle_openssl_des_key_sched
#define des_is_weak_key nettle_openssl_des_is_weak_key
/* An extra alias */
#undef des_set_key
#define des_set_key nettle_openssl_des_key_sched
enum { DES_DECRYPT = 0, DES_ENCRYPT = 1 };
/* Types */
/* NOTE: Typedef:ed arrays should be avoided, but they're used here
* for compatibility. */
typedef uint32_t DES_LONG;
typedef struct des_ctx des_key_schedule[1];
typedef uint8_t des_cblock[DES_BLOCK_SIZE];
/* Aliases */
#define des_ecb2_encrypt(i,o,k1,k2,e) \
des_ecb3_encrypt((i),(o),(k1),(k2),(k1),(e))
#define des_ede2_cbc_encrypt(i,o,l,k1,k2,iv,e) \
des_ede3_cbc_encrypt((i),(o),(l),(k1),(k2),(k1),(iv),(e))
/* Global flag */
extern int des_check_key;
/* Prototypes */
void
des_ecb3_encrypt(des_cblock *src, des_cblock *dst,
des_key_schedule k1, des_key_schedule k2,
des_key_schedule k3, int enc);
/* des_cbc_cksum in libdes returns a 32 bit integer, representing the
* latter half of the output block, using little endian byte order. */
uint32_t
des_cbc_cksum(des_cblock *src, des_cblock *dst,
long length, des_key_schedule ctx,
des_cblock *iv);
/* NOTE: Doesn't update iv. */
void
des_cbc_encrypt(des_cblock *src, des_cblock *dst, long length,
des_key_schedule ctx, des_cblock *iv,
int enc);
/* Similar, but updates iv. */
void
des_ncbc_encrypt(des_cblock *src, des_cblock *dst, long length,
des_key_schedule ctx, des_cblock *iv,
int enc);
void
des_ecb_encrypt(des_cblock *src, des_cblock *dst,
des_key_schedule ctx, int enc);
void
des_ede3_cbc_encrypt(des_cblock *src, des_cblock *dst, long length,
des_key_schedule k1,des_key_schedule k2, des_key_schedule k3,
des_cblock *iv,
int enc);
int
des_set_odd_parity(des_cblock *key);
int
des_key_sched(des_cblock *key, des_key_schedule ctx);
int
des_is_weak_key(des_cblock *key);
#endif /* NETTLE_DES_COMPAT_H_INCLUDED */
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