3 * $Id: rmd128.h,v 1.2 2000/10/15 19:09:20 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 1.2 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.
37 * Revision 1.1 2000/07/09 21:30:31 mdw
38 * New RIPEMD variants.
42 /*----- Notes on the RIPEMD-128 hash function -----------------------------*
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.
49 #ifndef CATACOMB_RMD128_H
50 #define CATACOMB_RMD128_H
56 /*----- Header files ------------------------------------------------------*/
58 #include <mLib/bits.h>
60 #ifndef CATACOMB_GHASH_H
64 /*----- Magic numbers -----------------------------------------------------*/
66 #define RMD128_BUFSZ 64
67 #define RMD128_HASHSZ 16
68 #define RMD128_STATESZ 16
70 /*----- Data structures ---------------------------------------------------*/
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 */
79 /*----- Functions provided ------------------------------------------------*/
81 /* --- @rmd128_compress@ --- *
83 * Arguments: @rmd128_ctx *ctx@ = pointer to context block
84 * @const void *sbuf@ = pointer to buffer of appropriate size
88 * Use: RIPEMD-128 compression function.
91 extern void rmd128_compress(rmd128_ctx */
*ctx*/
, const void */
*sbuf*/
);
93 /* --- @rmd128_init@ --- *
95 * Arguments: @rmd128_ctx *ctx@ = pointer to context block to initialize
99 * Use: Initializes a context block ready for hashing.
102 extern void rmd128_init(rmd128_ctx */
*ctx*/
);
104 /* --- @rmd128_set@ --- *
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
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.
117 extern void rmd128_set(rmd128_ctx */
*ctx*/
,
118 const void */
*buf*/
, unsigned long /*count*/);
120 /* --- @rmd128_hash@ --- *
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
128 * Use: Hashes a buffer of data. The buffer may be of any size and
132 extern void rmd128_hash(rmd128_ctx */
*ctx*/
,
133 const void */
*buf*/
, size_t /*sz*/);
135 /* --- @rmd128_done@ --- *
137 * Arguments: @rmd128_ctx *ctx@ = pointer to context block
138 * @void *hash@ = pointer to output buffer
142 * Use: Returns the hash of the data read so far.
145 extern void rmd128_done(rmd128_ctx */
*ctx*/
, void */
*hash*/
);
147 /* --- @rmd128_state@ --- *
149 * Arguments: @rmd128_ctx *ctx@ = pointer to context
150 * @void *state@ = pointer to buffer for current state
152 * Returns: Number of bytes written to the hash function so far.
154 * Use: Returns the current state of the hash function such that
155 * it can be passed to @rmd128_set@.
158 extern unsigned long rmd128_state(rmd128_ctx */
*ctx*/
, void */
*state*/
);
160 /*----- Generic hash interface --------------------------------------------*/
162 extern const gchash rmd128
;
164 /*----- That's all, folks -------------------------------------------------*/