Update build for OpenSSL-1.0.0b import.
[dragonfly.git] / secure / lib / libcrypt / blowfish.h
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1/*
2 * Blowfish - a fast block cipher designed by Bruce Schneier
3 *
4 * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Niels Provos.
18 * 4. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 * $FreeBSD: src/secure/lib/libcrypt/blowfish.h,v 1.1.2.1 2001/05/24 12:20:03 markm Exp $
3eefb696 33 * $DragonFly: src/secure/lib/libcrypt/blowfish.h,v 1.3 2003/11/14 03:54:32 dillon Exp $
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34 */
35
36/*
37 * FreeBSD implementation by Paul Herman <pherman@frenchfries.net>
38 */
39
40#ifndef _BLF_H_
41#define _BLF_H_
42
43/* Schneier states the maximum key length to be 56 bytes.
44 * The way how the subkeys are initalized by the key up
45 * to (N+2)*4 i.e. 72 bytes are utilized.
46 * Warning: For normal blowfish encryption only 56 bytes
47 * of the key affect all cipherbits.
48 */
49
50#define BLF_N 16 /* Number of Subkeys */
51#define BLF_MAXKEYLEN ((BLF_N-2)*4) /* 448 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
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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);
984263bc 69void Blowfish_expandstate
3eefb696 70 (blf_ctx *, const u_int8_t *, u_int16_t, const u_int8_t *, u_int16_t);
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71
72/* Standard Blowfish */
73
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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);
984263bc 77
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78void blf_ecb_encrypt (blf_ctx *, u_int8_t *, u_int32_t);
79void blf_ecb_decrypt (blf_ctx *, u_int8_t *, u_int32_t);
984263bc 80
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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);
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83
84/* Converts u_int8_t to u_int32_t */
3eefb696 85u_int32_t Blowfish_stream2word (const u_int8_t *, u_int16_t , u_int16_t *);
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86
87#endif