3 * $Id: ghash.h,v 1.7 2004/04/08 01:36:15 mdw Exp $
5 * Generic hash function interface
7 * (c) 1999 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 #ifndef CATACOMB_GHASH_H
31 #define CATACOMB_GHASH_H
37 /*----- Header files ------------------------------------------------------*/
41 #include <mLib/bits.h>
43 /*----- Generic hash function interface -----------------------------------*/
45 typedef struct ghash
{
46 const struct ghash_ops
*ops
; /* Pointer to hash operations */
49 typedef struct ghash_ops
{
50 const struct gchash
*c
; /* Pointer to hash class */
51 void (*hash
)(ghash */
*h*/
, const void */
*p*/
, size_t /*sz*/); /* Hash */
52 octet
*(*done
)(ghash */
*h*/
, void */
*buf*/
); /* Write result */
53 void (*destroy
)(ghash */
*h*/
); /* Destroy hash block */
54 ghash
*(*copy
)(ghash */
*h*/
); /* Make a copy of the hash context */
57 #define GH_INIT(ch) (ch)->init()
58 #define GH_CLASS(h) (h)->ops->c
59 #define GH_HASH(h, p, sz) (h)->ops->hash((h), (p), (sz))
60 #define GH_DONE(h, buf) (h)->ops->done((h), (buf))
61 #define GH_DESTROY(h) (h)->ops->destroy((h))
62 #define GH_COPY(h) (h)->ops->copy((h))
64 typedef struct gchash
{
65 const char *name
; /* Name of the hash function */
66 size_t hashsz
; /* Size of output hash */
67 ghash
*(*init
)(void); /* Create a new hash instance */
68 size_t bufsz
; /* Buffer size, or zero */
71 /*----- Tables ------------------------------------------------------------*/
73 extern const gchash
*const ghashtab
[];
75 /* --- @ghash_byname@ --- *
77 * Arguments: @const char *p@ = pointer to name string
79 * Returns: The named cipher class, or null.
82 extern const gchash
*ghash_byname(const char */
*p*/
);
84 /*----- That's all, folks -------------------------------------------------*/