/* crypto/des/rpc_enc.c */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 * 

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 * 

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library 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 cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from 

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 * 

 * 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 "rpc_des.h"

#include "des_locl.h"

#include "des_ver.h"

EXPORT_C int _des_crypt(char *buf,int len,struct desparams *desp);

EXPORT_C int _des_crypt(char *buf, int len, struct desparams *desp)

	{

	DES_key_schedule ks;

	int enc;

	DES_set_key_unchecked(&desp->des_key,&ks);

	enc=(desp->des_dir == ENCRYPT)?DES_ENCRYPT:DES_DECRYPT;

	if (desp->des_mode == CBC)

		DES_ecb_encrypt((const_DES_cblock *)desp->UDES.UDES_buf,

				(DES_cblock *)desp->UDES.UDES_buf,&ks,

				enc);

	else

		{

		DES_ncbc_encrypt(desp->UDES.UDES_buf,desp->UDES.UDES_buf,

				len,&ks,&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);	

	}