3 * The des block cipher. And triple des.
6 /* nettle, low-level cryptographics library
8 * Copyright (C) 1992, 2001, Dana L. How, Niels Möller
10 * The nettle library is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 of the License, or (at your
13 * option) any later version.
15 * The nettle library is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
17 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
18 * License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with the nettle library; see the file COPYING.LIB. If not, write to
22 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
27 * des - fast & portable DES encryption & decryption.
28 * Copyright (C) 1992 Dana L. How
29 * Please see the file `../lib/descore.README' for the complete copyright
32 * Slightly edited by Niels Möller, 1997
35 #ifndef NETTLE_DES_H_INCLUDED
36 #define NETTLE_DES_H_INCLUDED
38 #include "nettle-types.h"
44 /* Namespace mangling */
45 #define des_set_key nettle_des_set_key
46 #define des_encrypt nettle_des_encrypt
47 #define des_decrypt nettle_des_decrypt
48 #define des_check_parity nettle_des_check_parity
49 #define des_fix_parity nettle_des_fix_parity
50 #define des3_set_key nettle_des3_set_key
51 #define des3_encrypt nettle_des3_encrypt
52 #define des3_decrypt nettle_des3_decrypt
54 #define DES_KEY_SIZE 8
55 #define DES_BLOCK_SIZE 8
57 /* Expanded key length */
58 #define _DES_KEY_LENGTH 32
61 uint32_t key
[_DES_KEY_LENGTH
];
64 /* Returns 1 for good keys and 0 for weak keys. */
66 des_set_key(struct des_ctx
*ctx
, const uint8_t * key
);
69 des_encrypt(const struct des_ctx
*ctx
,
70 unsigned length
, uint8_t * dst
, const uint8_t * src
);
72 des_decrypt(const struct des_ctx
*ctx
,
73 unsigned length
, uint8_t * dst
, const uint8_t * src
);
76 des_check_parity(unsigned length
, const uint8_t * key
);
79 des_fix_parity(unsigned length
, uint8_t * dst
,
82 #define DES3_KEY_SIZE 24
83 #define DES3_BLOCK_SIZE DES_BLOCK_SIZE
86 struct des_ctx des
[3];
90 /* Returns 1 for good keys and 0 for weak keys. */
92 des3_set_key(struct des3_ctx
*ctx
, const uint8_t * key
);
95 des3_encrypt(const struct des3_ctx
*ctx
,
96 unsigned length
, uint8_t * dst
, const uint8_t * src
);
98 des3_decrypt(const struct des3_ctx
*ctx
,
99 unsigned length
, uint8_t * dst
, const uint8_t * src
);
104 #endif /* NETTLE_DES_H_INCLUDED */