3 * $Id: rmd160.h,v 1.2 1999/12/10 23:20:03 mdw Exp $
5 * The RIPEMD-160 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 1999/12/10 23:20:03 mdw
34 * New hash interface requirements.
36 * Revision 1.1 1999/09/03 08:41:12 mdw
41 /*----- Notes on the RIPEMD-160 hash function -----------------------------*
43 * RIPEMD-160 was invented by Hans Dobbertin, Antoon Bosselaers and Bart
44 * Preneel. It's a strengthened version of the original RIPEMD hash
45 * function, fixing a vulnerability discovered by Hans Dobbertin. The
46 * RIPEMD-160 design team appears well respected in the cryptographic
47 * community. The author finds them more plausible than SHA-1, which is the
48 * best alternative hash function.
51 #ifndef CATACOMB_RMD160_H
52 #define CATACOMB_RMD160_H
58 /*----- Header files ------------------------------------------------------*/
60 #include <mLib/bits.h>
62 #ifndef CATACOMB_GHASH_H
66 /*----- Magic numbers -----------------------------------------------------*/
68 #define RMD160_BUFSZ 64
69 #define RMD160_HASHSZ 20
71 /*----- Data structures ---------------------------------------------------*/
73 typedef struct rmd160_ctx
{
74 uint32 a
, b
, c
, d
, e
; /* Chaining variables */
75 uint32 nl
, nh
; /* Byte count so far */
76 int off
; /* Offset into buffer */
77 octet buf
[RMD160_BUFSZ
]; /* Accumulation buffer */
80 /*----- Functions provided ------------------------------------------------*/
82 /* --- @rmd160_compress@ --- *
84 * Arguments: @rmd160_ctx *ctx@ = pointer to context block
85 * @const void *sbuf@ = pointer to buffer of appropriate size
89 * Use: RIPEMD-160 compression function.
92 extern void rmd160_compress(rmd160_ctx */
*ctx*/
, const void */
*sbuf*/
);
94 /* --- @rmd160_init@ --- *
96 * Arguments: @rmd160_ctx *ctx@ = pointer to context block to initialize
100 * Use: Initializes a context block ready for hashing.
103 extern void rmd160_init(rmd160_ctx */
*ctx*/
);
105 /* --- @rmd160_set@ --- *
107 * Arguments: @rmd160_ctx *ctx@ = pointer to context block
108 * @const void *buf@ = pointer to state buffer
109 * @unsigned long count@ = current count of bytes processed
113 * Use: Initializes a context block from a given state. This is
114 * useful in cases where the initial hash state is meant to be
115 * secret, e.g., for NMAC and HMAC support.
118 extern void rmd160_set(rmd160_ctx */
*ctx*/
,
119 const void */
*buf*/
, unsigned long /*count*/);
121 /* --- @rmd160_hash@ --- *
123 * Arguments: @rmd160_ctx *ctx@ = pointer to context block
124 * @const void *buf@ = buffer of data to hash
125 * @size_t sz@ = size of buffer to hash
129 * Use: Hashes a buffer of data. The buffer may be of any size and
133 extern void rmd160_hash(rmd160_ctx */
*ctx*/
,
134 const void */
*buf*/
, size_t /*sz*/);
136 /* --- @rmd160_done@ --- *
138 * Arguments: @rmd160_ctx *ctx@ = pointer to context block
139 * @void *hash@ = pointer to output buffer
143 * Use: Returns the hash of the data read so far.
146 extern void rmd160_done(rmd160_ctx */
*ctx*/
, void */
*hash*/
);
148 /* --- @rmd160_state@ --- *
150 * Arguments: @rmd160_ctx *ctx@ = pointer to context
151 * @void *state@ = pointer to buffer for current state
153 * Returns: Number of bytes written to the hash function so far.
155 * Use: Returns the current state of the hash function such that
156 * it can be passed to @rmd160_set@.
159 extern unsigned long rmd160_state(rmd160_ctx */
*ctx*/
, void */
*state*/
);
161 /*----- Generic hash interface --------------------------------------------*/
163 extern const gchash rmd160
;
165 /*----- That's all, folks -------------------------------------------------*/