/* lib/des/rpc_enc.c */
/* Copyright (C) 1995 Eric Young (eay@mincom.oz.au)
 * All rights reserved.
 * 
 * This file is part of an SSL implementation written
 * by Eric Young (eay@mincom.oz.au).
 * The implementation was written so as to conform with Netscapes SSL
 * specification.  This library and applications are
 * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
 * as long as the following conditions are aheared to.
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.  If this code is used in a product,
 * Eric Young should be given attribution as the author of the parts used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by Eric Young (eay@mincom.oz.au)
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <kerberosIV/rpc_des.h>
#include "des_locl.h"
#include "version.h"

#ifdef PROTO
int _des_crypt(char *buf,int len,struct desparams *desp);
#else
int _des_crypt();
#endif

int _des_crypt(buf, len, desp)
char *buf;
int len;
struct desparams *desp;
	{
	Key_schedule ks;
	int enc;

	des_set_key_schedule((des_cblock *)desp->des_key,ks);
	enc=(desp->des_dir == ENCRYPT)?DES_ENCRYPT:DES_DECRYPT;

	if (desp->des_mode == CBC)
		des_ecb_encrypt((des_cblock *)desp->UDES.UDES_buf,
				(des_cblock *)desp->UDES.UDES_buf,ks,enc);
	else
		{
		des_ncbc_encrypt((des_cblock *)desp->UDES.UDES_buf,
				(des_cblock *)desp->UDES.UDES_buf,
				(long)len,ks,
				(des_cblock *)desp->des_ivec,enc);
#ifdef undef
		/* len will always be %8 if called from common_crypt
		 * in secure_rpc.
		 * Libdes's cbc encrypt does not copy back the iv,
		 * so we have to do it here. */
		/* It does now :-) eay 20/09/95 */

		a=(char *)&(desp->UDES.UDES_buf[len-8]);
		b=(char *)&(desp->des_ivec[0]);

		*(a++)= *(b++); *(a++)= *(b++);
		*(a++)= *(b++); *(a++)= *(b++);
		*(a++)= *(b++); *(a++)= *(b++);
		*(a++)= *(b++); *(a++)= *(b++);
#endif
		}
	return(1);	
	}