1/*	$NetBSD: blf.h,v 1.2 2018/04/06 18:58:59 christos Exp $	*/
2/* $OpenBSD: blf.h,v 1.7 2007/03/14 17:59:41 grunk Exp $ */
3/*
4 * Blowfish - a fast block cipher designed by Bruce Schneier
5 *
6 * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *      This product includes software developed by Niels Provos.
20 * 4. The name of the author may not be used to endorse or promote products
21 *    derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#ifndef _BLF_H_
36#define _BLF_H_
37
38#include "includes.h"
39
40#if !defined(HAVE_BCRYPT_PBKDF) && !defined(HAVE_BLH_H)
41
42/* Schneier specifies a maximum key length of 56 bytes.
43 * This ensures that every key bit affects every cipher
44 * bit.  However, the subkeys can hold up to 72 bytes.
45 * Warning: For normal blowfish encryption only 56 bytes
46 * of the key affect all cipherbits.
47 */
48
49#define BLF_N	16			/* Number of Subkeys */
50#define BLF_MAXKEYLEN ((BLF_N-2)*4)	/* 448 bits */
51#define BLF_MAXUTILIZED ((BLF_N+2)*4)	/* 576 bits */
52
53/* Blowfish context */
54typedef struct BlowfishContext {
55	u_int32_t S[4][256];	/* S-Boxes */
56	u_int32_t P[BLF_N + 2];	/* Subkeys */
57} blf_ctx;
58
59/* Raw access to customized Blowfish
60 *	blf_key is just:
61 *	Blowfish_initstate( state )
62 *	Blowfish_expand0state( state, key, keylen )
63 */
64
65void Blowfish_encipher(blf_ctx *, u_int32_t *, u_int32_t *);
66void Blowfish_decipher(blf_ctx *, u_int32_t *, u_int32_t *);
67void Blowfish_initstate(blf_ctx *);
68void Blowfish_expand0state(blf_ctx *, const u_int8_t *, u_int16_t);
69void Blowfish_expandstate
70(blf_ctx *, const u_int8_t *, u_int16_t, const u_int8_t *, u_int16_t);
71
72/* Standard Blowfish */
73
74void blf_key(blf_ctx *, const u_int8_t *, u_int16_t);
75void blf_enc(blf_ctx *, u_int32_t *, u_int16_t);
76void blf_dec(blf_ctx *, u_int32_t *, u_int16_t);
77
78void blf_ecb_encrypt(blf_ctx *, u_int8_t *, u_int32_t);
79void blf_ecb_decrypt(blf_ctx *, u_int8_t *, u_int32_t);
80
81void blf_cbc_encrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t);
82void blf_cbc_decrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t);
83
84/* Converts u_int8_t to u_int32_t */
85u_int32_t Blowfish_stream2word(const u_int8_t *, u_int16_t , u_int16_t *);
86
87#endif /* !defined(HAVE_BCRYPT_PBKDF) && !defined(HAVE_BLH_H) */
88#endif /* _BLF_H */
89
90