3 * $Id: rmd128.h,v 1.1 2000/07/09 21:30:31 mdw Exp $
5 * The RIPEMD-128 message digest function
7 * (c) 1998 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
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.
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.
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,
30 /*----- Revision history --------------------------------------------------*
33 * Revision 1.1 2000/07/09 21:30:31 mdw
34 * New RIPEMD variants.
38 /*----- Notes on the RIPEMD-128 hash function -----------------------------*
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.
45 #ifndef CATACOMB_RMD128_H
46 #define CATACOMB_RMD128_H
52 /*----- Header files ------------------------------------------------------*/
54 #include <mLib/bits.h>
56 #ifndef CATACOMB_GHASH_H
60 /*----- Magic numbers -----------------------------------------------------*/
62 #define RMD128_BUFSZ 64
63 #define RMD128_HASHSZ 16
65 /*----- Data structures ---------------------------------------------------*/
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 */
74 /*----- Functions provided ------------------------------------------------*/
76 /* --- @rmd128_compress@ --- *
78 * Arguments: @rmd128_ctx *ctx@ = pointer to context block
79 * @const void *sbuf@ = pointer to buffer of appropriate size
83 * Use: RIPEMD-128 compression function.
86 extern void rmd128_compress(rmd128_ctx */
*ctx*/
, const void */
*sbuf*/
);
88 /* --- @rmd128_init@ --- *
90 * Arguments: @rmd128_ctx *ctx@ = pointer to context block to initialize
94 * Use: Initializes a context block ready for hashing.
97 extern void rmd128_init(rmd128_ctx */
*ctx*/
);
99 /* --- @rmd128_set@ --- *
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
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.
112 extern void rmd128_set(rmd128_ctx */
*ctx*/
,
113 const void */
*buf*/
, unsigned long /*count*/);
115 /* --- @rmd128_hash@ --- *
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
123 * Use: Hashes a buffer of data. The buffer may be of any size and
127 extern void rmd128_hash(rmd128_ctx */
*ctx*/
,
128 const void */
*buf*/
, size_t /*sz*/);
130 /* --- @rmd128_done@ --- *
132 * Arguments: @rmd128_ctx *ctx@ = pointer to context block
133 * @void *hash@ = pointer to output buffer
137 * Use: Returns the hash of the data read so far.
140 extern void rmd128_done(rmd128_ctx */
*ctx*/
, void */
*hash*/
);
142 /* --- @rmd128_state@ --- *
144 * Arguments: @rmd128_ctx *ctx@ = pointer to context
145 * @void *state@ = pointer to buffer for current state
147 * Returns: Number of bytes written to the hash function so far.
149 * Use: Returns the current state of the hash function such that
150 * it can be passed to @rmd128_set@.
153 extern unsigned long rmd128_state(rmd128_ctx */
*ctx*/
, void */
*state*/
);
155 /*----- Generic hash interface --------------------------------------------*/
157 extern const gchash rmd128
;
159 /*----- That's all, folks -------------------------------------------------*/