1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/* $OpenBSD: blf.h,v 1.3 2001/05/15 02:40:35 deraadt Exp $ */
/*
* Blowfish - a fast block cipher designed by Bruce Schneier
*
* Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Niels Provos.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _BLF_H_
#define _BLF_H_
/* Schneier states the maximum key length to be 56 bytes.
* The way how the subkeys are initalized by the key up
* to (N+2)*4 i.e. 72 bytes are utilized.
* Warning: For normal blowfish encryption only 56 bytes
* of the key affect all cipherbits.
*/
#define BLF_N 16 /* Number of Subkeys */
#define BLF_MAXKEYLEN ((BLF_N-2)*4) /* 448 bits */
/* Blowfish context */
typedef struct BlowfishContext
{
uint32 S[4][256]; /* S-Boxes */
uint32 P[BLF_N + 2]; /* Subkeys */
} blf_ctx;
/* Raw access to customized Blowfish
* blf_key is just:
* Blowfish_initstate( state )
* Blowfish_expand0state( state, key, keylen )
*/
void Blowfish_encipher(blf_ctx *, uint32 *);
void Blowfish_decipher(blf_ctx *, uint32 *);
void Blowfish_initstate(blf_ctx *);
void Blowfish_expand0state(blf_ctx *, const uint8 *, uint16);
void Blowfish_expandstate
(blf_ctx *, const uint8 *, uint16, const uint8 *, uint16);
/* Standard Blowfish */
void blf_key(blf_ctx *, const uint8 *, uint16);
void blf_enc(blf_ctx *, uint32 *, uint16);
void blf_dec(blf_ctx *, uint32 *, uint16);
/* Converts uint8 to uint32 */
uint32 Blowfish_stream2word(const uint8 *, uint16, uint16 *);
void blf_ecb_encrypt(blf_ctx *, uint8 *, uint32);
void blf_ecb_decrypt(blf_ctx *, uint8 *, uint32);
void blf_cbc_encrypt(blf_ctx *, uint8 *, uint8 *, uint32);
void blf_cbc_decrypt(blf_ctx *, uint8 *, uint8 *, uint32);
#endif
|
