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1/* $OpenBSD: blf.h,v 1.7 2007/03/14 17:59:41 grunk Exp $ */
2/*
3 * Blowfish - a fast block cipher designed by Bruce Schneier
4 *
5 * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Niels Provos.
19 * 4. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#ifndef _NODE_BLF_H_
35#define _NODE_BLF_H_
36
37/* Solaris compatibility */
38#ifdef __sun
39#define u_int8_t uint8_t
40#define u_int16_t uint16_t
41#define u_int32_t uint32_t
42#define u_int64_t uint64_t
43#endif
44
45#ifdef _WIN32
46#define u_int8_t unsigned __int8
47#define u_int16_t unsigned __int16
48#define u_int32_t unsigned __int32
49#define u_int64_t unsigned __int64
50#endif
51
52#define BCRYPT_VERSION '2'
53#define BCRYPT_MAXSALT 16 /* Precomputation is just so nice */
54#define BCRYPT_BLOCKS 6 /* Ciphertext blocks */
55#define BCRYPT_MINROUNDS 16 /* we have log2(rounds) in salt */
56
57/* Schneier specifies a maximum key length of 56 bytes.
58 * This ensures that every key bit affects every cipher
59 * bit. However, the subkeys can hold up to 72 bytes.
60 * Warning: For normal blowfish encryption only 56 bytes
61 * of the key affect all cipherbits.
62 */
63
64#define BLF_N 16 /* Number of Subkeys */
65#define BLF_MAXKEYLEN ((BLF_N-2)*4) /* 448 bits */
66#define BLF_MAXUTILIZED ((BLF_N+2)*4) /* 576 bits */
67
68#define _PASSWORD_LEN 128 /* max length, not counting NUL */
69#define _SALT_LEN 32 /* max length */
70
71/* Blowfish context */
72typedef struct BlowfishContext {
73 u_int32_t S[4][256]; /* S-Boxes */
74 u_int32_t P[BLF_N + 2]; /* Subkeys */
75} blf_ctx;
76
77/* Raw access to customized Blowfish
78 * blf_key is just:
79 * Blowfish_initstate( state )
80 * Blowfish_expand0state( state, key, keylen )
81 */
82
83void Blowfish_encipher(blf_ctx *, u_int32_t *, u_int32_t *);
84void Blowfish_decipher(blf_ctx *, u_int32_t *, u_int32_t *);
85void Blowfish_initstate(blf_ctx *);
86void Blowfish_expand0state(blf_ctx *, const u_int8_t *, u_int16_t);
87void Blowfish_expandstate
88(blf_ctx *, const u_int8_t *, u_int16_t, const u_int8_t *, u_int16_t);
89
90/* Standard Blowfish */
91
92void blf_key(blf_ctx *, const u_int8_t *, u_int16_t);
93void blf_enc(blf_ctx *, u_int32_t *, u_int16_t);
94void blf_dec(blf_ctx *, u_int32_t *, u_int16_t);
95
96void blf_ecb_encrypt(blf_ctx *, u_int8_t *, u_int32_t);
97void blf_ecb_decrypt(blf_ctx *, u_int8_t *, u_int32_t);
98
99void blf_cbc_encrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t);
100void blf_cbc_decrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t);
101
102/* Converts u_int8_t to u_int32_t */
103u_int32_t Blowfish_stream2word(const u_int8_t *, u_int16_t , u_int16_t *);
104
105/* bcrypt functions*/
106void bcrypt_gensalt(char, u_int8_t, u_int8_t*, char *);
107void bcrypt(const char *, const char *, char *);
108void encode_salt(char *, u_int8_t *, char, u_int16_t, u_int8_t);
109u_int32_t bcrypt_get_rounds(const char *);
110
111#endif