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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: blowfish.h,v 1.3 1997/08/07 09:43:20 mdw Exp $ |
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4 | * |
5 | * Blowfish encryption routines |
6 | * |
7 | * (c) 1997 Mark Wooding |
8 | */ |
9 | |
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10 | /*----- Licensing notice --------------------------------------------------* |
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11 | * |
12 | * This file is part of `become' |
13 | * |
14 | * `Become' is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU General Public License as published by |
16 | * the Free Software Foundation; either version 2 of the License, or |
17 | * (at your option) any later version. |
18 | * |
19 | * `Become' is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU General Public License |
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25 | * along with `become'; if not, write to the Free Software Foundation, |
26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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27 | */ |
28 | |
29 | /*----- Revision history --------------------------------------------------* |
30 | * |
31 | * $Log: blowfish.h,v $ |
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32 | * Revision 1.3 1997/08/07 09:43:20 mdw |
33 | * Fix address of the FSF. |
34 | * |
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35 | * Revision 1.2 1997/08/04 10:24:20 mdw |
36 | * Sources placed under CVS control. |
37 | * |
38 | * Revision 1.1 1997/07/21 13:47:53 mdw |
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39 | * Initial revision |
40 | * |
41 | */ |
42 | |
43 | #ifndef BLOWFISH_H |
44 | #define BLOWFISH_H |
45 | |
46 | #ifdef __cplusplus |
47 | extern "C" { |
48 | #endif |
49 | |
50 | /*----- Type definitions --------------------------------------------------*/ |
51 | |
52 | /* --- A blowfish expanded key --- */ |
53 | |
54 | typedef struct blowfish_key { |
55 | uint_32 p[18]; |
56 | uint_32 s0[256]; |
57 | uint_32 s1[256]; |
58 | uint_32 s2[256]; |
59 | uint_32 s3[256]; |
60 | } blowfish_key; |
61 | |
62 | /*----- Functions provided ------------------------------------------------*/ |
63 | |
64 | /* --- @blowfish_encrypt@ --- * |
65 | * |
66 | * Arguments: @const blowfish_key *k@ = pointer to key block |
67 | * @const voic *from@ = block to encrypt from |
68 | * @void *to@ = block to encrypt to |
69 | * |
70 | * Returns: --- |
71 | * |
72 | * Use: Encrypts a block using the Blowfish algorithm. |
73 | */ |
74 | |
75 | extern void blowfish_encrypt(const blowfish_key */*k*/, |
76 | const void */*from*/, void */*to*/); |
77 | |
78 | |
79 | /* --- @blowfish_decrypt@ --- * |
80 | * |
81 | * Arguments: @const blowfish_key *k@ = pointer to key block |
82 | * @const void *from@ = block to decrypt from |
83 | * @void *to@ = block to decrypt to |
84 | * |
85 | * Returns: --- |
86 | * |
87 | * Use: Decrypts a block using the Blowfish algorithm. |
88 | */ |
89 | |
90 | extern void blowfish_decrypt(const blowfish_key */*k*/, |
91 | const void */*from*/, void */*to*/); |
92 | |
93 | /* --- @blowfish_setKey@ --- * |
94 | * |
95 | * Arguments: @blowfish_key *kb@ = pointer to key block to fill |
96 | * @void *k@ = pointer to key data |
97 | * @size_t sz@ = length of data in bytes |
98 | * |
99 | * Returns: --- |
100 | * |
101 | * Use: Expands a key which isn't represented as a number of whole |
102 | * words. This is a nonstandard extension, although it can be |
103 | * used to support 40-bit keys, which some governments might |
104 | * find more palatable than 160-bit (or 448-bit!) keys. |
105 | */ |
106 | |
107 | extern void blowfish_setKey(blowfish_key */*kb*/, |
108 | const void */*k*/, size_t /*sz*/); |
109 | |
110 | /*----- That's all, folks -------------------------------------------------*/ |
111 | |
112 | #ifdef __cplusplus |
113 | } |
114 | #endif |
115 | |
116 | #endif |