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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: rmd128.h,v 1.2 2000/10/15 19:09:20 mdw Exp $ |
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4 | * |
5 | * The RIPEMD-128 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: rmd128.h,v $ |
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33 | * Revision 1.2 2000/10/15 19:09:20 mdw |
34 | * Support HMAC mode for hash functions which need to store more state than |
35 | * the hash output size. |
36 | * |
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37 | * Revision 1.1 2000/07/09 21:30:31 mdw |
38 | * New RIPEMD variants. |
39 | * |
40 | */ |
41 | |
42 | /*----- Notes on the RIPEMD-128 hash function -----------------------------* |
43 | * |
44 | * RIPEMD-128 was invented by Hans Dobbertin, Antoon Bosselaers and Bart |
45 | * Preneel, as a drop-in replacement for MD5 (with the same sized output). |
46 | * It's a cut-down version of RIPEMD-160, which should be used in preference. |
47 | */ |
48 | |
49 | #ifndef CATACOMB_RMD128_H |
50 | #define CATACOMB_RMD128_H |
51 | |
52 | #ifdef __cplusplus |
53 | extern "C" { |
54 | #endif |
55 | |
56 | /*----- Header files ------------------------------------------------------*/ |
57 | |
58 | #include <mLib/bits.h> |
59 | |
60 | #ifndef CATACOMB_GHASH_H |
61 | # include "ghash.h" |
62 | #endif |
63 | |
64 | /*----- Magic numbers -----------------------------------------------------*/ |
65 | |
66 | #define RMD128_BUFSZ 64 |
67 | #define RMD128_HASHSZ 16 |
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68 | #define RMD128_STATESZ 16 |
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69 | |
70 | /*----- Data structures ---------------------------------------------------*/ |
71 | |
72 | typedef struct rmd128_ctx { |
73 | uint32 a, b, c, d; /* Chaining variables */ |
74 | uint32 nl, nh; /* Byte count so far */ |
75 | unsigned off; /* Offset into buffer */ |
76 | octet buf[RMD128_BUFSZ]; /* Accumulation buffer */ |
77 | } rmd128_ctx; |
78 | |
79 | /*----- Functions provided ------------------------------------------------*/ |
80 | |
81 | /* --- @rmd128_compress@ --- * |
82 | * |
83 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block |
84 | * @const void *sbuf@ = pointer to buffer of appropriate size |
85 | * |
86 | * Returns: --- |
87 | * |
88 | * Use: RIPEMD-128 compression function. |
89 | */ |
90 | |
91 | extern void rmd128_compress(rmd128_ctx */*ctx*/, const void */*sbuf*/); |
92 | |
93 | /* --- @rmd128_init@ --- * |
94 | * |
95 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block to initialize |
96 | * |
97 | * Returns: --- |
98 | * |
99 | * Use: Initializes a context block ready for hashing. |
100 | */ |
101 | |
102 | extern void rmd128_init(rmd128_ctx */*ctx*/); |
103 | |
104 | /* --- @rmd128_set@ --- * |
105 | * |
106 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block |
107 | * @const void *buf@ = pointer to state buffer |
108 | * @unsigned long count@ = current count of bytes processed |
109 | * |
110 | * Returns: --- |
111 | * |
112 | * Use: Initializes a context block from a given state. This is |
113 | * useful in cases where the initial hash state is meant to be |
114 | * secret, e.g., for NMAC and HMAC support. |
115 | */ |
116 | |
117 | extern void rmd128_set(rmd128_ctx */*ctx*/, |
118 | const void */*buf*/, unsigned long /*count*/); |
119 | |
120 | /* --- @rmd128_hash@ --- * |
121 | * |
122 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block |
123 | * @const void *buf@ = buffer of data to hash |
124 | * @size_t sz@ = size of buffer to hash |
125 | * |
126 | * Returns: --- |
127 | * |
128 | * Use: Hashes a buffer of data. The buffer may be of any size and |
129 | * alignment. |
130 | */ |
131 | |
132 | extern void rmd128_hash(rmd128_ctx */*ctx*/, |
133 | const void */*buf*/, size_t /*sz*/); |
134 | |
135 | /* --- @rmd128_done@ --- * |
136 | * |
137 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block |
138 | * @void *hash@ = pointer to output buffer |
139 | * |
140 | * Returns: --- |
141 | * |
142 | * Use: Returns the hash of the data read so far. |
143 | */ |
144 | |
145 | extern void rmd128_done(rmd128_ctx */*ctx*/, void */*hash*/); |
146 | |
147 | /* --- @rmd128_state@ --- * |
148 | * |
149 | * Arguments: @rmd128_ctx *ctx@ = pointer to context |
150 | * @void *state@ = pointer to buffer for current state |
151 | * |
152 | * Returns: Number of bytes written to the hash function so far. |
153 | * |
154 | * Use: Returns the current state of the hash function such that |
155 | * it can be passed to @rmd128_set@. |
156 | */ |
157 | |
158 | extern unsigned long rmd128_state(rmd128_ctx */*ctx*/, void */*state*/); |
159 | |
160 | /*----- Generic hash interface --------------------------------------------*/ |
161 | |
162 | extern const gchash rmd128; |
163 | |
164 | /*----- That's all, folks -------------------------------------------------*/ |
165 | |
166 | #ifdef __cplusplus |
167 | } |
168 | #endif |
169 | |
170 | #endif |