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/*
 * @(#)des_crypt.h	2.1 88/08/11 4.0 RPCSRC
 *
 * des_crypt.h, des library routine interface
 * 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_CRYPT_H__
#define __DES_CRYPT_H__ 1

#include <features.h>

__BEGIN_DECLS

#define DES_MAXDATA 8192	/* max bytes encrypted in one call */
#define DES_DIRMASK (1 << 0)
#define DES_ENCRYPT (0*DES_DIRMASK)	/* Encrypt */
#define DES_DECRYPT (1*DES_DIRMASK)	/* Decrypt */

#define DES_DEVMASK (1 << 1)
#define	DES_HW (0*DES_DEVMASK)	/* Use hardware device */
#define DES_SW (1*DES_DEVMASK)	/* Use software device */

#define DESERR_NONE 0	/* succeeded */
#define DESERR_NOHWDEVICE 1	/* succeeded, but hw device not available */
#define DESERR_HWERROR 2	/* failed, hardware/driver error */
#define DESERR_BADPARAM 3	/* failed, bad parameter to call */

#define DES_FAILED(err) \
	((err) > DESERR_NOHWDEVICE)

/*
 * cbc_crypt()
 * ecb_crypt()
 *
 * Encrypt (or decrypt) len bytes of a buffer buf.
 * The length must be a multiple of eight.
 * The key should have odd parity in the low bit of each byte.
 * ivec is the input vector, and is updated to the new one (cbc only).
 * The mode is created by oring together the appropriate parameters.
 * DESERR_NOHWDEVICE is returned if DES_HW was specified but
 * there was no hardware to do it on (the data will still be
 * encrypted though, in software).
 */

/*
 * Cipher Block Chaining mode
 */
extern int cbc_crypt (char *__key, char *__buf, unsigned __len,
		      unsigned __mode, char *__ivec) __THROW;

/*
 * Electronic Code Book mode
 */
extern int ecb_crypt (char *__key, char *__buf, unsigned __len,
		      unsigned __mode) __THROW;

/*
 * Set des parity for a key.
 * DES parity is odd and in the low bit of each byte
 */
extern void des_setparity (char *__key) __THROW;

__END_DECLS

#endif

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