d03ab969 |
1 | /* -*-c-*- |
2 | * |
1a44eacd |
3 | * $Id: rmd160.h,v 1.3 2000/06/17 11:32:52 mdw Exp $ |
d03ab969 |
4 | * |
5 | * The RIPEMD-160 message digest function |
6 | * |
7 | * (c) 1998 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of Catacomb. |
13 | * |
14 | * Catacomb is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * Catacomb 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 Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with Catacomb; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: rmd160.h,v $ |
1a44eacd |
33 | * Revision 1.3 2000/06/17 11:32:52 mdw |
34 | * Change buffer offset to be unsigned. |
35 | * |
dc2f0497 |
36 | * Revision 1.2 1999/12/10 23:20:03 mdw |
37 | * New hash interface requirements. |
38 | * |
d03ab969 |
39 | * Revision 1.1 1999/09/03 08:41:12 mdw |
40 | * Initial import. |
41 | * |
42 | */ |
43 | |
44 | /*----- Notes on the RIPEMD-160 hash function -----------------------------* |
45 | * |
46 | * RIPEMD-160 was invented by Hans Dobbertin, Antoon Bosselaers and Bart |
47 | * Preneel. It's a strengthened version of the original RIPEMD hash |
48 | * function, fixing a vulnerability discovered by Hans Dobbertin. The |
49 | * RIPEMD-160 design team appears well respected in the cryptographic |
50 | * community. The author finds them more plausible than SHA-1, which is the |
51 | * best alternative hash function. |
52 | */ |
53 | |
dc2f0497 |
54 | #ifndef CATACOMB_RMD160_H |
55 | #define CATACOMB_RMD160_H |
d03ab969 |
56 | |
57 | #ifdef __cplusplus |
58 | extern "C" { |
59 | #endif |
60 | |
61 | /*----- Header files ------------------------------------------------------*/ |
62 | |
63 | #include <mLib/bits.h> |
64 | |
dc2f0497 |
65 | #ifndef CATACOMB_GHASH_H |
66 | # include "ghash.h" |
67 | #endif |
68 | |
d03ab969 |
69 | /*----- Magic numbers -----------------------------------------------------*/ |
70 | |
71 | #define RMD160_BUFSZ 64 |
72 | #define RMD160_HASHSZ 20 |
73 | |
74 | /*----- Data structures ---------------------------------------------------*/ |
75 | |
76 | typedef struct rmd160_ctx { |
77 | uint32 a, b, c, d, e; /* Chaining variables */ |
dc2f0497 |
78 | uint32 nl, nh; /* Byte count so far */ |
1a44eacd |
79 | unsigned off; /* Offset into buffer */ |
d03ab969 |
80 | octet buf[RMD160_BUFSZ]; /* Accumulation buffer */ |
81 | } rmd160_ctx; |
82 | |
83 | /*----- Functions provided ------------------------------------------------*/ |
84 | |
85 | /* --- @rmd160_compress@ --- * |
86 | * |
87 | * Arguments: @rmd160_ctx *ctx@ = pointer to context block |
88 | * @const void *sbuf@ = pointer to buffer of appropriate size |
89 | * |
90 | * Returns: --- |
91 | * |
92 | * Use: RIPEMD-160 compression function. |
93 | */ |
94 | |
95 | extern void rmd160_compress(rmd160_ctx */*ctx*/, const void */*sbuf*/); |
96 | |
97 | /* --- @rmd160_init@ --- * |
98 | * |
99 | * Arguments: @rmd160_ctx *ctx@ = pointer to context block to initialize |
100 | * |
101 | * Returns: --- |
102 | * |
103 | * Use: Initializes a context block ready for hashing. |
104 | */ |
105 | |
106 | extern void rmd160_init(rmd160_ctx */*ctx*/); |
107 | |
108 | /* --- @rmd160_set@ --- * |
109 | * |
110 | * Arguments: @rmd160_ctx *ctx@ = pointer to context block |
111 | * @const void *buf@ = pointer to state buffer |
112 | * @unsigned long count@ = current count of bytes processed |
113 | * |
114 | * Returns: --- |
115 | * |
116 | * Use: Initializes a context block from a given state. This is |
117 | * useful in cases where the initial hash state is meant to be |
118 | * secret, e.g., for NMAC and HMAC support. |
119 | */ |
120 | |
121 | extern void rmd160_set(rmd160_ctx */*ctx*/, |
122 | const void */*buf*/, unsigned long /*count*/); |
123 | |
124 | /* --- @rmd160_hash@ --- * |
125 | * |
126 | * Arguments: @rmd160_ctx *ctx@ = pointer to context block |
127 | * @const void *buf@ = buffer of data to hash |
128 | * @size_t sz@ = size of buffer to hash |
129 | * |
130 | * Returns: --- |
131 | * |
132 | * Use: Hashes a buffer of data. The buffer may be of any size and |
133 | * alignment. |
134 | */ |
135 | |
136 | extern void rmd160_hash(rmd160_ctx */*ctx*/, |
137 | const void */*buf*/, size_t /*sz*/); |
138 | |
139 | /* --- @rmd160_done@ --- * |
140 | * |
141 | * Arguments: @rmd160_ctx *ctx@ = pointer to context block |
142 | * @void *hash@ = pointer to output buffer |
143 | * |
144 | * Returns: --- |
145 | * |
146 | * Use: Returns the hash of the data read so far. |
147 | */ |
148 | |
149 | extern void rmd160_done(rmd160_ctx */*ctx*/, void */*hash*/); |
150 | |
151 | /* --- @rmd160_state@ --- * |
152 | * |
153 | * Arguments: @rmd160_ctx *ctx@ = pointer to context |
154 | * @void *state@ = pointer to buffer for current state |
155 | * |
156 | * Returns: Number of bytes written to the hash function so far. |
157 | * |
158 | * Use: Returns the current state of the hash function such that |
159 | * it can be passed to @rmd160_set@. |
160 | */ |
161 | |
162 | extern unsigned long rmd160_state(rmd160_ctx */*ctx*/, void */*state*/); |
163 | |
dc2f0497 |
164 | /*----- Generic hash interface --------------------------------------------*/ |
165 | |
166 | extern const gchash rmd160; |
167 | |
d03ab969 |
168 | /*----- That's all, folks -------------------------------------------------*/ |
169 | |
170 | #ifdef __cplusplus |
171 | } |
172 | #endif |
173 | |
174 | #endif |