Generic interface.

[u/mdw/catacomb] / gcipher.h

/* -*-c-*-
 *
 * $Id: gcipher.h,v 1.1 1999/12/10 23:16:01 mdw Exp $
 *
 * Generic symmetric cipher interface
 *
 * (c) 1999 Straylight/Edgeware
 */

/*----- Licensing notice --------------------------------------------------* 
 *
 * This file is part of Catacomb.
 *
 * Catacomb is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Library General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 * 
 * Catacomb is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Library General Public License for more details.
 * 
 * You should have received a copy of the GNU Library General Public
 * License along with Catacomb; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA 02111-1307, USA.
 */

/*----- Revision history --------------------------------------------------* 
 *
 * $Log: gcipher.h,v $
 * Revision 1.1  1999/12/10 23:16:01  mdw
 * Generic interface.
 *
 */

#ifndef CATACOMB_GCIPHER_H
#define CATACOMB_GCIPHER_H

#ifdef __cplusplus
  extern "C" {
#endif

/*----- Header files ------------------------------------------------------*/

#include <stddef.h>

/*----- Generic symmetric cipher interface --------------------------------*/

typedef struct gccipher_base {
  const char *name;			/* Cipher name */
  size_t keysz;				/* Preferred key size in bytes */
  size_t blksz;				/* Block size or zero if none */
} gccipher_base;

typedef struct gcipher {
  const struct gcipher_ops *ops;	/* Pointer to cipher operations */
} gcipher;

typedef struct gcipher_ops {
  const struct gccipher_base *b;	/* Pointer to basic information */
  void (*encrypt)(gcipher */*c*/, const void */*s*/,
		  void */*t*/, size_t /*sz*/);
  void (*decrypt)(gcipher */*c*/, const void */*s*/,
		  void */*t*/, size_t /*sz*/);
  void (*destroy)(gcipher */*c*/);
  void (*setiv)(gcipher */*c*/, const void */*iv*/);
  void (*bdry)(gcipher */*c*/);
} gcipher_ops;

typedef struct gccipher {
  gccipher_base b;
  gcipher *(*init)(const void */*k*/, size_t /*sz*/);
} gccipher;

/*----- That's all, folks -------------------------------------------------*/

#ifdef __cplusplus
  }
#endif

#endif