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   1 /* -*-c-*-
   2  *
   3  * $Id: gmac.h,v 1.3 2004/04/04 19:42:30 mdw Exp $
   4  *
   5  * Generic MAC function interface
   6  *
   7  * (c) 1999 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of Catacomb.
  13  *
  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.
  18  *
  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.
  23  *
  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,
  27  * MA 02111-1307, USA.
  28  */
  29
  30 /*----- Revision history --------------------------------------------------*
  31  *
  32  * $Log: gmac.h,v $
  33  * Revision 1.3  2004/04/04 19:42:30  mdw
  34  * Make tables of standard encryption schemes etc.
  35  *
  36  * Revision 1.2  2000/06/17 11:22:46  mdw
  37  * Minor changes in the generic hash and MAC interfaces.
  38  *
  39  * Revision 1.1  1999/12/10 23:16:01  mdw
  40  * Generic interface.
  41  *
  42  */
  43
  44 #ifndef CATACOMB_GMAC_H
  45 #define CATACOMB_GMAC_H
  46
  47 #ifdef __cplusplus
  48   extern "C" {
  49 #endif
  50
  51 /*----- Header files ------------------------------------------------------*/
  52
  53 #include <stddef.h>
  54
  55 #ifndef CATACOMB_GCIPHER_H
  56 #  include "gcipher.h"
  57 #endif
  58
  59 #ifndef CATACOMB_GHASH_H
  60 #  include "ghash.h"
  61 #endif
  62
  63 /*----- Generic MAC function interface ------------------------------------*/
  64
  65 typedef struct gmac {
  66   const struct gmac_ops *ops;           /* Pointer to MAC operations */
  67 } gmac;
  68
  69 typedef struct gmac_ops {
  70   const struct gcmac *c;                /* Pointer to MAC class */
  71   ghash *(*init)(gmac */*m*/);          /* Create keyed hash instance */
  72   void (*destroy)(gmac */*m*/);         /* Destroy MAC key block */
  73 } gmac_ops;
  74
  75 typedef struct gcmac {
  76   const char *name;                     /* Name of the MAC function */
  77   size_t hashsz;                        /* Size of output hash */
  78   const octet *keysz;                   /* Key size options */
  79   gmac *(*key)(const void */*k*/, size_t /*sz*/); /* Create key */
  80 } gcmac;
  81
  82 #define GM_KEY(cm, k, ksz)      (cm)->key((k), (ksz))
  83 #define GM_CLASS(km)            (km)->ops->c
  84 #define GM_INIT(km)             (km)->ops->init((km))
  85 #define GM_DESTROY(km)          (km)->ops->destroy((km))
  86
  87 /*----- Tables ------------------------------------------------------------*/
  88
  89 extern const gcmac *const gmactab[];
  90
  91 /* --- @gmac_byname@ --- *
  92  *
  93  * Arguments:   @const char *p@ = pointer to name string
  94  *
  95  * Returns:     The named cipher class, or null.
  96  */
  97
  98 extern const gcmac *gmac_byname(const char */*p*/);
  99
 100 /*----- That's all, folks -------------------------------------------------*/
 101
 102 #ifdef __cplusplus
 103   }
 104 #endif
 105
 106 #endif