blowfish block size is 8 bytes
[strongswan.git] / src / libstrongswan / plugins / blowfish / blowfish.h
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
63 extern "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 #endif
86 /*
87 * _CRAY note. I could declare short, but I have no idea what impact
88 * does it have on performance on none-T3E machines. I could declare
89 * int, but at least on C90 sizeof(int) can be chosen at compile time.
90 * So I've chosen long...
91 * <appro@fy.chalmers.se>
92 */
93
94 /* des.h-like hack <jjo-ipsec@mendoza.gov.ar> */
95 #ifndef BF_LONG
96 #ifdef __KERNEL__
97 #include <linux/types.h>
98 #else
99 #include <sys/types.h>
100 #endif
101 #define BF_LONG u_int32_t
102 #endif
103
104 #define BF_ROUNDS 16
105 #define BF_BLOCK 8
106
107 typedef struct bf_key_st
108 {
109 BF_LONG P[BF_ROUNDS+2];
110 BF_LONG S[4*256];
111 } BF_KEY;
112
113
114 void BF_set_key(BF_KEY *key, int len, const unsigned char *data);
115
116 void BF_encrypt(BF_LONG *data,const BF_KEY *key);
117 void BF_decrypt(BF_LONG *data,const BF_KEY *key);
118
119 void BF_ecb_encrypt(const unsigned char *in, unsigned char *out,
120 const BF_KEY *key, int enc);
121 void BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
122 const BF_KEY *schedule, unsigned char *ivec, int enc);
123 void BF_cfb64_encrypt(const unsigned char *in, unsigned char *out, long length,
124 const BF_KEY *schedule, unsigned char *ivec, int *num, int enc);
125 void BF_ofb64_encrypt(const unsigned char *in, unsigned char *out, long length,
126 const BF_KEY *schedule, unsigned char *ivec, int *num);
127 const char *BF_options(void);
128
129 #ifdef __cplusplus
130 }
131 #endif
132
133 #endif