1 /* arctwo.h --- The arctwo block cipher
2 * Copyright (C) 2000, 2001, 2002, 2003, 2005 Free Software Foundation, Inc.
4 * This file is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License as published
6 * by the Free Software Foundation; either version 2.1, or (at your
7 * option) any later version.
9 * This file is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public License
15 * along with this file; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 /* Code from Libgcrypt adapted for gnulib by Simon Josefsson. */
34 #define ARCTWO_BLOCK_SIZE 8
36 /* Initialize CONTEXT using KEY of KEYLEN length. If
37 EFFECTIVE_KEYLEN, truncate the key (using a special algorithm) to
38 only be of EFFECTIVE_KEYLEN bits. Normally, you use
39 EFFECTIVE_KEYLEN of 0, but see RFC 2268 for more information. */
41 arctwo_setkey_ekb (arctwo_context
*context
,
42 size_t keylen
, const char *key
, size_t effective_keylen
);
44 #define arctwo_setkey(context,keylen,key) \
45 arctwo_setkey_ekb (context, keylen, key, 8 * (keylen))
47 /* Encrypt INBUF of size LENGTH into OUTBUF. LENGTH must be a
48 multiple of ARCTWO_BLOCK_SIZE. CONTEXT hold the encryption key,
49 and must have been initialized with arctwo_setkey or
52 arctwo_encrypt (arctwo_context
*context
, const char *inbuf
,
53 char *outbuf
, size_t length
);
55 /* Decrypt INBUF of size LENGTH into OUTBUF. LENGTH must be a
56 multiple of ARCTWO_BLOCK_SIZE. CONTEXT hold the decryption key,
57 and must have been initialized with arctwo_setkey or
60 arctwo_decrypt (arctwo_context
*context
, const char *inbuf
,
61 char *outbuf
, size_t length
);