text: /* crypto/des/rpc_enc.c */
  /* Copyright (C) 1995-1997 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"
  
  #ifndef NOPROTO
  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;
  	{
  	des_key_schedule ks;
  	int enc;
  
  	des_set_key((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);	
  	}
  
  