d03ab969 |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: rmd160.h,v 1.1 1999/09/03 08:41:12 mdw Exp $ |
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 $ |
33 | * Revision 1.1 1999/09/03 08:41:12 mdw |
34 | * Initial import. |
35 | * |
36 | */ |
37 | |
38 | /*----- Notes on the RIPEMD-160 hash function -----------------------------* |
39 | * |
40 | * RIPEMD-160 was invented by Hans Dobbertin, Antoon Bosselaers and Bart |
41 | * Preneel. It's a strengthened version of the original RIPEMD hash |
42 | * function, fixing a vulnerability discovered by Hans Dobbertin. The |
43 | * RIPEMD-160 design team appears well respected in the cryptographic |
44 | * community. The author finds them more plausible than SHA-1, which is the |
45 | * best alternative hash function. |
46 | */ |
47 | |
48 | #ifndef RMD160_H |
49 | #define RMD160_H |
50 | |
51 | #ifdef __cplusplus |
52 | extern "C" { |
53 | #endif |
54 | |
55 | /*----- Header files ------------------------------------------------------*/ |
56 | |
57 | #include <mLib/bits.h> |
58 | |
59 | /*----- Magic numbers -----------------------------------------------------*/ |
60 | |
61 | #define RMD160_BUFSZ 64 |
62 | #define RMD160_HASHSZ 20 |
63 | |
64 | /*----- Data structures ---------------------------------------------------*/ |
65 | |
66 | typedef struct rmd160_ctx { |
67 | uint32 a, b, c, d, e; /* Chaining variables */ |
68 | unsigned long count; /* Byte count so far */ |
69 | int off; /* Offset into buffer */ |
70 | octet buf[RMD160_BUFSZ]; /* Accumulation buffer */ |
71 | } rmd160_ctx; |
72 | |
73 | /*----- Functions provided ------------------------------------------------*/ |
74 | |
75 | /* --- @rmd160_compress@ --- * |
76 | * |
77 | * Arguments: @rmd160_ctx *ctx@ = pointer to context block |
78 | * @const void *sbuf@ = pointer to buffer of appropriate size |
79 | * |
80 | * Returns: --- |
81 | * |
82 | * Use: RIPEMD-160 compression function. |
83 | */ |
84 | |
85 | extern void rmd160_compress(rmd160_ctx */*ctx*/, const void */*sbuf*/); |
86 | |
87 | /* --- @rmd160_init@ --- * |
88 | * |
89 | * Arguments: @rmd160_ctx *ctx@ = pointer to context block to initialize |
90 | * |
91 | * Returns: --- |
92 | * |
93 | * Use: Initializes a context block ready for hashing. |
94 | */ |
95 | |
96 | extern void rmd160_init(rmd160_ctx */*ctx*/); |
97 | |
98 | /* --- @rmd160_set@ --- * |
99 | * |
100 | * Arguments: @rmd160_ctx *ctx@ = pointer to context block |
101 | * @const void *buf@ = pointer to state buffer |
102 | * @unsigned long count@ = current count of bytes processed |
103 | * |
104 | * Returns: --- |
105 | * |
106 | * Use: Initializes a context block from a given state. This is |
107 | * useful in cases where the initial hash state is meant to be |
108 | * secret, e.g., for NMAC and HMAC support. |
109 | */ |
110 | |
111 | extern void rmd160_set(rmd160_ctx */*ctx*/, |
112 | const void */*buf*/, unsigned long /*count*/); |
113 | |
114 | /* --- @rmd160_hash@ --- * |
115 | * |
116 | * Arguments: @rmd160_ctx *ctx@ = pointer to context block |
117 | * @const void *buf@ = buffer of data to hash |
118 | * @size_t sz@ = size of buffer to hash |
119 | * |
120 | * Returns: --- |
121 | * |
122 | * Use: Hashes a buffer of data. The buffer may be of any size and |
123 | * alignment. |
124 | */ |
125 | |
126 | extern void rmd160_hash(rmd160_ctx */*ctx*/, |
127 | const void */*buf*/, size_t /*sz*/); |
128 | |
129 | /* --- @rmd160_done@ --- * |
130 | * |
131 | * Arguments: @rmd160_ctx *ctx@ = pointer to context block |
132 | * @void *hash@ = pointer to output buffer |
133 | * |
134 | * Returns: --- |
135 | * |
136 | * Use: Returns the hash of the data read so far. |
137 | */ |
138 | |
139 | extern void rmd160_done(rmd160_ctx */*ctx*/, void */*hash*/); |
140 | |
141 | /* --- @rmd160_state@ --- * |
142 | * |
143 | * Arguments: @rmd160_ctx *ctx@ = pointer to context |
144 | * @void *state@ = pointer to buffer for current state |
145 | * |
146 | * Returns: Number of bytes written to the hash function so far. |
147 | * |
148 | * Use: Returns the current state of the hash function such that |
149 | * it can be passed to @rmd160_set@. |
150 | */ |
151 | |
152 | extern unsigned long rmd160_state(rmd160_ctx */*ctx*/, void */*state*/); |
153 | |
154 | /*----- That's all, folks -------------------------------------------------*/ |
155 | |
156 | #ifdef __cplusplus |
157 | } |
158 | #endif |
159 | |
160 | #endif |