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1/* crypto/bf/blowfish.h */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#ifndef HEADER_BLOWFISH_H
60#define HEADER_BLOWFISH_H
61
62#ifdef __cplusplus
63extern "C" {
64#endif
65
66#ifdef NO_BF
67#error BF is disabled.
68#endif
69
70#define BF_ENCRYPT 1
71#define BF_DECRYPT 0
72
73/*
74 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
75 * ! BF_LONG has to be at least 32 bits wide. If it's wider, then !
76 * ! BF_LONG_LOG2 has to be defined along. !
77 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
78 */
79
80#if defined(WIN16) || defined(__LP32__)
81#define BF_LONG unsigned long
82#elif defined(_CRAY) || defined(__ILP64__)
83#define BF_LONG unsigned long
84#define BF_LONG_LOG2 3
85/*
86 * _CRAY note. I could declare short, but I have no idea what impact
87 * does it have on performance on none-T3E machines. I could declare
88 * int, but at least on C90 sizeof(int) can be chosen at compile time.
89 * So I've chosen long...
90 * <appro@fy.chalmers.se>
91 */
92#else
93#define BF_LONG unsigned int
94#endif
95
96#define BF_ROUNDS 16
97#define BF_BLOCK 8
98
99typedef struct bf_key_st
100 {
101 BF_LONG P[BF_ROUNDS+2];
102 BF_LONG S[4*256];
103 } BF_KEY;
104
105
106void BF_set_key(BF_KEY *key, int len, unsigned char *data);
107void BF_ecb_encrypt(unsigned char *in,unsigned char *out,BF_KEY *key,
108 int enc);
109void BF_encrypt(BF_LONG *data,BF_KEY *key);
110void BF_decrypt(BF_LONG *data,BF_KEY *key);
111void BF_cbc_encrypt(unsigned char *in, unsigned char *out, long length,
112 BF_KEY *ks, unsigned char *iv, int enc);
113void BF_cfb64_encrypt(unsigned char *in, unsigned char *out, long length,
114 BF_KEY *schedule, unsigned char *ivec, int *num, int enc);
115void BF_ofb64_encrypt(unsigned char *in, unsigned char *out, long length,
116 BF_KEY *schedule, unsigned char *ivec, int *num);
117const char *BF_options(void);
118
119#ifdef __cplusplus
120}
121#endif
122
123#endif