3 * $Id: ghash-def.h,v 1.5 2001/01/25 21:39:58 mdw Exp $
5 * Definitions for generic hash 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 /*----- Revision history --------------------------------------------------*
32 * $Log: ghash-def.h,v $
33 * Revision 1.5 2001/01/25 21:39:58 mdw
34 * Burn the hash context when it's done with, for paranoia's sake.
36 * Revision 1.4 2000/07/15 10:00:58 mdw
37 * New generic hash operation for copying hash contexts.
39 * Revision 1.3 2000/07/02 18:27:42 mdw
40 * (ghash->ops->done): Interface change. Passing in a null buffer pointer
41 * uses a buffer internal to the ghash object. The operation returns the
42 * address of the buffer it used. Clients of generic hashes no longer need
43 * to use dynamically allocated memory for hash results.
45 * Revision 1.2 2000/06/17 11:22:03 mdw
46 * Use secure arena for memory allocation. Minor changes in the generic
49 * Revision 1.1 1999/12/10 23:21:37 mdw
54 #ifndef CATACOMB_GHASH_DEF_H
55 #define CATACOMB_GHASH_DEF_H
61 /*----- Header files ------------------------------------------------------*/
63 #include <mLib/bits.h>
66 #ifndef CATACOMB_ARENA_H
70 #ifndef CATACOMB_GHASH_H
74 #ifndef CATACOMB_PARANOIA_H
75 # include "paranoia.h"
78 /*----- Generic hash function interface -----------------------------------*/
80 /* --- @GHASH_DEF@ --- *
82 * Arguments: @PRE, pre@ = prefixes for hash function
84 * Use: Defines the generic hash instance.
87 #define GHASH_DEF(PRE, pre) \
89 static const ghash_ops gops; \
91 typedef struct gctx { \
94 octet buf[PRE##_HASHSZ]; \
97 static ghash *ghinit(void) \
99 gctx *g = S_CREATE(gctx); \
105 static void ghhash(ghash *h, const void *p, size_t sz) \
107 gctx *g = (gctx *)h; \
108 pre##_hash(&g->c, p, sz); \
111 static octet *ghdone(ghash *h, void *buf) \
113 gctx *g = (gctx *)h; \
116 pre##_done(&g->c, buf); \
120 static void ghdestroy(ghash *h) \
122 gctx *g = (gctx *)h; \
127 static ghash *ghcopy(ghash *h) \
129 gctx *g = (gctx *)h; \
130 gctx *gg = S_CREATE(gctx); \
131 memcpy(gg, g, sizeof(gctx)); \
135 static const ghash_ops gops = \
136 { &pre, ghhash, ghdone, ghdestroy, ghcopy }; \
137 const gchash pre = { #pre, PRE##_HASHSZ, ghinit };
139 /*----- That's all, folks -------------------------------------------------*/