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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: rmd320.h,v 1.3 2004/04/08 01:36:15 mdw Exp $ |
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4 | * |
5 | * The RIPEMD-320 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 | |
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30 | /*----- Notes on the RIPEMD-320 hash function -----------------------------* |
31 | * |
32 | * RIPEMD-320 was invented by Hans Dobbertin, Antoon Bosselaers and Bart |
33 | * Preneel. It's a double-width version of RIPEMD-160, constructed simply by |
34 | * not gluing together the two parallel computations which RIPEMD-160 usually |
35 | * does in its compression function. The authors warn that, while its output |
36 | * is twice as wide as that of RIPEMD-160, they don't expect it to offer any |
37 | * more security. |
38 | */ |
39 | |
40 | #ifndef CATACOMB_RMD320_H |
41 | #define CATACOMB_RMD320_H |
42 | |
43 | #ifdef __cplusplus |
44 | extern "C" { |
45 | #endif |
46 | |
47 | /*----- Header files ------------------------------------------------------*/ |
48 | |
49 | #include <mLib/bits.h> |
50 | |
51 | #ifndef CATACOMB_GHASH_H |
52 | # include "ghash.h" |
53 | #endif |
54 | |
55 | /*----- Magic numbers -----------------------------------------------------*/ |
56 | |
57 | #define RMD320_BUFSZ 64 |
58 | #define RMD320_HASHSZ 40 |
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59 | #define RMD320_STATESZ 40 |
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60 | |
61 | /*----- Data structures ---------------------------------------------------*/ |
62 | |
63 | typedef struct rmd320_ctx { |
64 | uint32 a, b, c, d, e; /* Chaining variables */ |
65 | uint32 A, B, C, D, E; /* More chaining variables */ |
66 | uint32 nl, nh; /* Byte count so far */ |
67 | unsigned off; /* Offset into buffer */ |
68 | octet buf[RMD320_BUFSZ]; /* Accumulation buffer */ |
69 | } rmd320_ctx; |
70 | |
71 | /*----- Functions provided ------------------------------------------------*/ |
72 | |
73 | /* --- @rmd320_compress@ --- * |
74 | * |
75 | * Arguments: @rmd320_ctx *ctx@ = pointer to context block |
76 | * @const void *sbuf@ = pointer to buffer of appropriate size |
77 | * |
78 | * Returns: --- |
79 | * |
80 | * Use: RIPEMD-320 compression function. |
81 | */ |
82 | |
83 | extern void rmd320_compress(rmd320_ctx */*ctx*/, const void */*sbuf*/); |
84 | |
85 | /* --- @rmd320_init@ --- * |
86 | * |
87 | * Arguments: @rmd320_ctx *ctx@ = pointer to context block to initialize |
88 | * |
89 | * Returns: --- |
90 | * |
91 | * Use: Initializes a context block ready for hashing. |
92 | */ |
93 | |
94 | extern void rmd320_init(rmd320_ctx */*ctx*/); |
95 | |
96 | /* --- @rmd320_set@ --- * |
97 | * |
98 | * Arguments: @rmd320_ctx *ctx@ = pointer to context block |
99 | * @const void *buf@ = pointer to state buffer |
100 | * @unsigned long count@ = current count of bytes processed |
101 | * |
102 | * Returns: --- |
103 | * |
104 | * Use: Initializes a context block from a given state. This is |
105 | * useful in cases where the initial hash state is meant to be |
106 | * secret, e.g., for NMAC and HMAC support. |
107 | */ |
108 | |
109 | extern void rmd320_set(rmd320_ctx */*ctx*/, |
110 | const void */*buf*/, unsigned long /*count*/); |
111 | |
112 | /* --- @rmd320_hash@ --- * |
113 | * |
114 | * Arguments: @rmd320_ctx *ctx@ = pointer to context block |
115 | * @const void *buf@ = buffer of data to hash |
116 | * @size_t sz@ = size of buffer to hash |
117 | * |
118 | * Returns: --- |
119 | * |
120 | * Use: Hashes a buffer of data. The buffer may be of any size and |
121 | * alignment. |
122 | */ |
123 | |
124 | extern void rmd320_hash(rmd320_ctx */*ctx*/, |
125 | const void */*buf*/, size_t /*sz*/); |
126 | |
127 | /* --- @rmd320_done@ --- * |
128 | * |
129 | * Arguments: @rmd320_ctx *ctx@ = pointer to context block |
130 | * @void *hash@ = pointer to output buffer |
131 | * |
132 | * Returns: --- |
133 | * |
134 | * Use: Returns the hash of the data read so far. |
135 | */ |
136 | |
137 | extern void rmd320_done(rmd320_ctx */*ctx*/, void */*hash*/); |
138 | |
139 | /* --- @rmd320_state@ --- * |
140 | * |
141 | * Arguments: @rmd320_ctx *ctx@ = pointer to context |
142 | * @void *state@ = pointer to buffer for current state |
143 | * |
144 | * Returns: Number of bytes written to the hash function so far. |
145 | * |
146 | * Use: Returns the current state of the hash function such that |
147 | * it can be passed to @rmd320_set@. |
148 | */ |
149 | |
150 | extern unsigned long rmd320_state(rmd320_ctx */*ctx*/, void */*state*/); |
151 | |
152 | /*----- Generic hash interface --------------------------------------------*/ |
153 | |
154 | extern const gchash rmd320; |
155 | |
156 | /*----- That's all, folks -------------------------------------------------*/ |
157 | |
158 | #ifdef __cplusplus |
159 | } |
160 | #endif |
161 | |
162 | #endif |