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/*
 * Generic DES driver interface
 * Keep this file hardware independent!
 * Copyright (c) 2010, Oracle America, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *     * Neither the name of the "Oracle America, Inc." nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _DES_H
#define _DES_H

#include <sys/types.h>

#define DES_MAXLEN	65536	/* maximum # of bytes to encrypt  */
#define DES_QUICKLEN	16	/* maximum # of bytes to encrypt quickly */

enum desdir
  {
    ENCRYPT, DECRYPT
  };
enum desmode
  {
    CBC, ECB
  };

/*
 * parameters to ioctl call
 */
struct desparams
  {
    u_char des_key[8];		/* key (with low bit parity) */
    enum desdir des_dir;	/* direction */
    enum desmode des_mode;	/* mode */
    u_char des_ivec[8];		/* input vector */
    unsigned des_len;		/* number of bytes to crypt */
    union
      {
	u_char UDES_data[DES_QUICKLEN];
	u_char *UDES_buf;
      }
    UDES;
#define des_data UDES.UDES_data	/* direct data here if quick */
#define des_buf	UDES.UDES_buf	/* otherwise, pointer to data */
  };

#endif