3 * $Id: has160.h,v 1.2 2004/04/08 01:36:15 mdw Exp $
5 * The HAS160 message digest function
7 * (c) 2004 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 /*----- Notes on the HAS160 hash function ---------------------------------*
32 * HAS160 was designed by Chae Hoon Lim and the Korean Information Security
33 * Agency (KISA). It's recommended for use with KCDSA (though I think I'm
34 * happer with RIPEMD-160 or SHA1). It's here so I can check KCDSA test
38 #ifndef CATACOMB_HAS160_H
39 #define CATACOMB_HAS160_H
45 /*----- Header files ------------------------------------------------------*/
47 #include <mLib/bits.h>
49 #ifndef CATACOMB_GHASH_H
53 /*----- Magic numbers -----------------------------------------------------*/
55 #define HAS160_BUFSZ 64
56 #define HAS160_HASHSZ 20
57 #define HAS160_STATESZ 20
59 /*----- Data structures ---------------------------------------------------*/
61 typedef struct has160_ctx {
62 uint32 a, b, c, d, e; /* Chaining variables */
63 uint32 nl, nh; /* Byte count so far */
64 unsigned off; /* Offset into buffer */
65 octet buf[HAS160_BUFSZ]; /* Accumulation buffer */
68 /*----- Functions provided ------------------------------------------------*/
70 /* --- @has160_compress@ --- *
72 * Arguments: @has160_ctx *ctx@ = pointer to context block
73 * @const void *sbuf@ = pointer to buffer of appropriate size
77 * Use: HAS160 compression function.
80 extern void has160_compress(has160_ctx */*ctx*/, const void */*sbuf*/);
82 /* --- @has160_init@ --- *
84 * Arguments: @has160_ctx *ctx@ = pointer to context block to initialize
88 * Use: Initializes a context block ready for hashing.
91 extern void has160_init(has160_ctx */*ctx*/);
93 /* --- @has160_set@ --- *
95 * Arguments: @has160_ctx *ctx@ = pointer to context block
96 * @const void *buf@ = pointer to state buffer
97 * @unsigned long count@ = current count of bytes processed
101 * Use: Initializes a context block from a given state. This is
102 * useful in cases where the initial hash state is meant to be
103 * secret, e.g., for NMAC and HMAC support.
106 extern void has160_set(has160_ctx */*ctx*/, const void */*buf*/,
107 unsigned long /*count*/);
109 /* --- @has160_hash@ --- *
111 * Arguments: @has160_ctx *ctx@ = pointer to context block
112 * @const void *buf@ = buffer of data to hash
113 * @size_t sz@ = size of buffer to hash
117 * Use: Hashes a buffer of data. The buffer may be of any size and
121 extern void has160_hash(has160_ctx */*ctx*/,
122 const void */*buf*/, size_t /*sz*/);
124 /* --- @has160_done@ --- *
126 * Arguments: @has160_ctx *ctx@ = pointer to context block
127 * @void *hash@ = pointer to output buffer
131 * Use: Returns the hash of the data read so far.
134 extern void has160_done(has160_ctx */*ctx*/, void */*hash*/);
136 /* --- @has160_state@ --- *
138 * Arguments: @has160_ctx *ctx@ = pointer to context
139 * @void *state@ = pointer to buffer for current state
141 * Returns: Number of bytes written to the hash function so far.
143 * Use: Returns the current state of the hash function such that
144 * it can be passed to @has160_set@.
147 extern unsigned long has160_state(has160_ctx */*ctx*/, void */*state*/);
149 /*----- Generic hash interface --------------------------------------------*/
151 extern const gchash has160;
153 /*----- That's all, folks -------------------------------------------------*/