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1 | /* -*-c-*- |
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2 | * |
3 | * The RIPEMD-128 message digest function |
4 | * |
5 | * (c) 1998 Straylight/Edgeware |
6 | */ |
7 | |
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8 | /*----- Licensing notice --------------------------------------------------* |
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9 | * |
10 | * This file is part of Catacomb. |
11 | * |
12 | * Catacomb is free software; you can redistribute it and/or modify |
13 | * it under the terms of the GNU Library General Public License as |
14 | * published by the Free Software Foundation; either version 2 of the |
15 | * License, or (at your option) any later version. |
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16 | * |
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17 | * Catacomb is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | * GNU Library General Public License for more details. |
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21 | * |
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22 | * You should have received a copy of the GNU Library General Public |
23 | * License along with Catacomb; if not, write to the Free |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
25 | * MA 02111-1307, USA. |
26 | */ |
27 | |
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28 | /*----- Notes on the RIPEMD-128 hash function -----------------------------* |
29 | * |
30 | * RIPEMD-128 was invented by Hans Dobbertin, Antoon Bosselaers and Bart |
31 | * Preneel, as a drop-in replacement for MD5 (with the same sized output). |
32 | * It's a cut-down version of RIPEMD-160, which should be used in preference. |
33 | */ |
34 | |
35 | #ifndef CATACOMB_RMD128_H |
36 | #define CATACOMB_RMD128_H |
37 | |
38 | #ifdef __cplusplus |
39 | extern "C" { |
40 | #endif |
41 | |
42 | /*----- Header files ------------------------------------------------------*/ |
43 | |
44 | #include <mLib/bits.h> |
45 | |
46 | #ifndef CATACOMB_GHASH_H |
47 | # include "ghash.h" |
48 | #endif |
49 | |
50 | /*----- Magic numbers -----------------------------------------------------*/ |
51 | |
52 | #define RMD128_BUFSZ 64 |
53 | #define RMD128_HASHSZ 16 |
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54 | #define RMD128_STATESZ 16 |
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55 | |
56 | /*----- Data structures ---------------------------------------------------*/ |
57 | |
58 | typedef struct rmd128_ctx { |
59 | uint32 a, b, c, d; /* Chaining variables */ |
60 | uint32 nl, nh; /* Byte count so far */ |
61 | unsigned off; /* Offset into buffer */ |
62 | octet buf[RMD128_BUFSZ]; /* Accumulation buffer */ |
63 | } rmd128_ctx; |
64 | |
65 | /*----- Functions provided ------------------------------------------------*/ |
66 | |
67 | /* --- @rmd128_compress@ --- * |
68 | * |
69 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block |
70 | * @const void *sbuf@ = pointer to buffer of appropriate size |
71 | * |
72 | * Returns: --- |
73 | * |
74 | * Use: RIPEMD-128 compression function. |
75 | */ |
76 | |
77 | extern void rmd128_compress(rmd128_ctx */*ctx*/, const void */*sbuf*/); |
78 | |
79 | /* --- @rmd128_init@ --- * |
80 | * |
81 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block to initialize |
82 | * |
83 | * Returns: --- |
84 | * |
85 | * Use: Initializes a context block ready for hashing. |
86 | */ |
87 | |
88 | extern void rmd128_init(rmd128_ctx */*ctx*/); |
89 | |
90 | /* --- @rmd128_set@ --- * |
91 | * |
92 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block |
93 | * @const void *buf@ = pointer to state buffer |
94 | * @unsigned long count@ = current count of bytes processed |
95 | * |
96 | * Returns: --- |
97 | * |
98 | * Use: Initializes a context block from a given state. This is |
99 | * useful in cases where the initial hash state is meant to be |
100 | * secret, e.g., for NMAC and HMAC support. |
101 | */ |
102 | |
103 | extern void rmd128_set(rmd128_ctx */*ctx*/, |
104 | const void */*buf*/, unsigned long /*count*/); |
105 | |
106 | /* --- @rmd128_hash@ --- * |
107 | * |
108 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block |
109 | * @const void *buf@ = buffer of data to hash |
110 | * @size_t sz@ = size of buffer to hash |
111 | * |
112 | * Returns: --- |
113 | * |
114 | * Use: Hashes a buffer of data. The buffer may be of any size and |
115 | * alignment. |
116 | */ |
117 | |
118 | extern void rmd128_hash(rmd128_ctx */*ctx*/, |
119 | const void */*buf*/, size_t /*sz*/); |
120 | |
121 | /* --- @rmd128_done@ --- * |
122 | * |
123 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block |
124 | * @void *hash@ = pointer to output buffer |
125 | * |
126 | * Returns: --- |
127 | * |
128 | * Use: Returns the hash of the data read so far. |
129 | */ |
130 | |
131 | extern void rmd128_done(rmd128_ctx */*ctx*/, void */*hash*/); |
132 | |
133 | /* --- @rmd128_state@ --- * |
134 | * |
135 | * Arguments: @rmd128_ctx *ctx@ = pointer to context |
136 | * @void *state@ = pointer to buffer for current state |
137 | * |
138 | * Returns: Number of bytes written to the hash function so far. |
139 | * |
140 | * Use: Returns the current state of the hash function such that |
141 | * it can be passed to @rmd128_set@. |
142 | */ |
143 | |
144 | extern unsigned long rmd128_state(rmd128_ctx */*ctx*/, void */*state*/); |
145 | |
146 | /*----- Generic hash interface --------------------------------------------*/ |
147 | |
148 | extern const gchash rmd128; |
149 | |
150 | /*----- That's all, folks -------------------------------------------------*/ |
151 | |
152 | #ifdef __cplusplus |
153 | } |
154 | #endif |
155 | |
156 | #endif |