3 * $Id: rmd160.h,v 1.1 1999/09/03 08:41:12 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 1.1 1999/09/03 08:41:12 mdw
38 /*----- Notes on the RIPEMD-160 hash function -----------------------------*
40 * RIPEMD-160 was invented by Hans Dobbertin, Antoon Bosselaers and Bart
41 * Preneel. It's a strengthened version of the original RIPEMD hash
42 * function, fixing a vulnerability discovered by Hans Dobbertin. The
43 * RIPEMD-160 design team appears well respected in the cryptographic
44 * community. The author finds them more plausible than SHA-1, which is the
45 * best alternative hash function.
55 /*----- Header files ------------------------------------------------------*/
57 #include <mLib/bits.h>
59 /*----- Magic numbers -----------------------------------------------------*/
61 #define RMD160_BUFSZ 64
62 #define RMD160_HASHSZ 20
64 /*----- Data structures ---------------------------------------------------*/
66 typedef struct rmd160_ctx
{
67 uint32 a
, b
, c
, d
, e
; /* Chaining variables */
68 unsigned long count
; /* Byte count so far */
69 int off
; /* Offset into buffer */
70 octet buf
[RMD160_BUFSZ
]; /* Accumulation buffer */
73 /*----- Functions provided ------------------------------------------------*/
75 /* --- @rmd160_compress@ --- *
77 * Arguments: @rmd160_ctx *ctx@ = pointer to context block
78 * @const void *sbuf@ = pointer to buffer of appropriate size
82 * Use: RIPEMD-160 compression function.
85 extern void rmd160_compress(rmd160_ctx */
*ctx*/
, const void */
*sbuf*/
);
87 /* --- @rmd160_init@ --- *
89 * Arguments: @rmd160_ctx *ctx@ = pointer to context block to initialize
93 * Use: Initializes a context block ready for hashing.
96 extern void rmd160_init(rmd160_ctx */
*ctx*/
);
98 /* --- @rmd160_set@ --- *
100 * Arguments: @rmd160_ctx *ctx@ = pointer to context block
101 * @const void *buf@ = pointer to state buffer
102 * @unsigned long count@ = current count of bytes processed
106 * Use: Initializes a context block from a given state. This is
107 * useful in cases where the initial hash state is meant to be
108 * secret, e.g., for NMAC and HMAC support.
111 extern void rmd160_set(rmd160_ctx */
*ctx*/
,
112 const void */
*buf*/
, unsigned long /*count*/);
114 /* --- @rmd160_hash@ --- *
116 * Arguments: @rmd160_ctx *ctx@ = pointer to context block
117 * @const void *buf@ = buffer of data to hash
118 * @size_t sz@ = size of buffer to hash
122 * Use: Hashes a buffer of data. The buffer may be of any size and
126 extern void rmd160_hash(rmd160_ctx */
*ctx*/
,
127 const void */
*buf*/
, size_t /*sz*/);
129 /* --- @rmd160_done@ --- *
131 * Arguments: @rmd160_ctx *ctx@ = pointer to context block
132 * @void *hash@ = pointer to output buffer
136 * Use: Returns the hash of the data read so far.
139 extern void rmd160_done(rmd160_ctx */
*ctx*/
, void */
*hash*/
);
141 /* --- @rmd160_state@ --- *
143 * Arguments: @rmd160_ctx *ctx@ = pointer to context
144 * @void *state@ = pointer to buffer for current state
146 * Returns: Number of bytes written to the hash function so far.
148 * Use: Returns the current state of the hash function such that
149 * it can be passed to @rmd160_set@.
152 extern unsigned long rmd160_state(rmd160_ctx */
*ctx*/
, void */
*state*/
);
154 /*----- That's all, folks -------------------------------------------------*/