1c64c8e2 |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: rmd128.h,v 1.1 2000/07/09 21:30:31 mdw Exp $ |
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 $ |
33 | * Revision 1.1 2000/07/09 21:30:31 mdw |
34 | * New RIPEMD variants. |
35 | * |
36 | */ |
37 | |
38 | /*----- Notes on the RIPEMD-128 hash function -----------------------------* |
39 | * |
40 | * RIPEMD-128 was invented by Hans Dobbertin, Antoon Bosselaers and Bart |
41 | * Preneel, as a drop-in replacement for MD5 (with the same sized output). |
42 | * It's a cut-down version of RIPEMD-160, which should be used in preference. |
43 | */ |
44 | |
45 | #ifndef CATACOMB_RMD128_H |
46 | #define CATACOMB_RMD128_H |
47 | |
48 | #ifdef __cplusplus |
49 | extern "C" { |
50 | #endif |
51 | |
52 | /*----- Header files ------------------------------------------------------*/ |
53 | |
54 | #include <mLib/bits.h> |
55 | |
56 | #ifndef CATACOMB_GHASH_H |
57 | # include "ghash.h" |
58 | #endif |
59 | |
60 | /*----- Magic numbers -----------------------------------------------------*/ |
61 | |
62 | #define RMD128_BUFSZ 64 |
63 | #define RMD128_HASHSZ 16 |
64 | |
65 | /*----- Data structures ---------------------------------------------------*/ |
66 | |
67 | typedef struct rmd128_ctx { |
68 | uint32 a, b, c, d; /* Chaining variables */ |
69 | uint32 nl, nh; /* Byte count so far */ |
70 | unsigned off; /* Offset into buffer */ |
71 | octet buf[RMD128_BUFSZ]; /* Accumulation buffer */ |
72 | } rmd128_ctx; |
73 | |
74 | /*----- Functions provided ------------------------------------------------*/ |
75 | |
76 | /* --- @rmd128_compress@ --- * |
77 | * |
78 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block |
79 | * @const void *sbuf@ = pointer to buffer of appropriate size |
80 | * |
81 | * Returns: --- |
82 | * |
83 | * Use: RIPEMD-128 compression function. |
84 | */ |
85 | |
86 | extern void rmd128_compress(rmd128_ctx */*ctx*/, const void */*sbuf*/); |
87 | |
88 | /* --- @rmd128_init@ --- * |
89 | * |
90 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block to initialize |
91 | * |
92 | * Returns: --- |
93 | * |
94 | * Use: Initializes a context block ready for hashing. |
95 | */ |
96 | |
97 | extern void rmd128_init(rmd128_ctx */*ctx*/); |
98 | |
99 | /* --- @rmd128_set@ --- * |
100 | * |
101 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block |
102 | * @const void *buf@ = pointer to state buffer |
103 | * @unsigned long count@ = current count of bytes processed |
104 | * |
105 | * Returns: --- |
106 | * |
107 | * Use: Initializes a context block from a given state. This is |
108 | * useful in cases where the initial hash state is meant to be |
109 | * secret, e.g., for NMAC and HMAC support. |
110 | */ |
111 | |
112 | extern void rmd128_set(rmd128_ctx */*ctx*/, |
113 | const void */*buf*/, unsigned long /*count*/); |
114 | |
115 | /* --- @rmd128_hash@ --- * |
116 | * |
117 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block |
118 | * @const void *buf@ = buffer of data to hash |
119 | * @size_t sz@ = size of buffer to hash |
120 | * |
121 | * Returns: --- |
122 | * |
123 | * Use: Hashes a buffer of data. The buffer may be of any size and |
124 | * alignment. |
125 | */ |
126 | |
127 | extern void rmd128_hash(rmd128_ctx */*ctx*/, |
128 | const void */*buf*/, size_t /*sz*/); |
129 | |
130 | /* --- @rmd128_done@ --- * |
131 | * |
132 | * Arguments: @rmd128_ctx *ctx@ = pointer to context block |
133 | * @void *hash@ = pointer to output buffer |
134 | * |
135 | * Returns: --- |
136 | * |
137 | * Use: Returns the hash of the data read so far. |
138 | */ |
139 | |
140 | extern void rmd128_done(rmd128_ctx */*ctx*/, void */*hash*/); |
141 | |
142 | /* --- @rmd128_state@ --- * |
143 | * |
144 | * Arguments: @rmd128_ctx *ctx@ = pointer to context |
145 | * @void *state@ = pointer to buffer for current state |
146 | * |
147 | * Returns: Number of bytes written to the hash function so far. |
148 | * |
149 | * Use: Returns the current state of the hash function such that |
150 | * it can be passed to @rmd128_set@. |
151 | */ |
152 | |
153 | extern unsigned long rmd128_state(rmd128_ctx */*ctx*/, void */*state*/); |
154 | |
155 | /*----- Generic hash interface --------------------------------------------*/ |
156 | |
157 | extern const gchash rmd128; |
158 | |
159 | /*----- That's all, folks -------------------------------------------------*/ |
160 | |
161 | #ifdef __cplusplus |
162 | } |
163 | #endif |
164 | |
165 | #endif |