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      1 /* crypto/des/rpc_enc.c */
      2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com)
      3  * All rights reserved.
      4  *
      5  * This package is an SSL implementation written
      6  * by Eric Young (eay (at) cryptsoft.com).
      7  * The implementation was written so as to conform with Netscapes SSL.
      8  *
      9  * This library is free for commercial and non-commercial use as long as
     10  * the following conditions are aheared to.  The following conditions
     11  * apply to all code found in this distribution, be it the RC4, RSA,
     12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
     13  * included with this distribution is covered by the same copyright terms
     14  * except that the holder is Tim Hudson (tjh (at) cryptsoft.com).
     15  *
     16  * Copyright remains Eric Young's, and as such any Copyright notices in
     17  * the code are not to be removed.
     18  * If this package is used in a product, Eric Young should be given attribution
     19  * as the author of the parts of the library used.
     20  * This can be in the form of a textual message at program startup or
     21  * in documentation (online or textual) provided with the package.
     22  *
     23  * Redistribution and use in source and binary forms, with or without
     24  * modification, are permitted provided that the following conditions
     25  * are met:
     26  * 1. Redistributions of source code must retain the copyright
     27  *    notice, this list of conditions and the following disclaimer.
     28  * 2. Redistributions in binary form must reproduce the above copyright
     29  *    notice, this list of conditions and the following disclaimer in the
     30  *    documentation and/or other materials provided with the distribution.
     31  * 3. All advertising materials mentioning features or use of this software
     32  *    must display the following acknowledgement:
     33  *    "This product includes cryptographic software written by
     34  *     Eric Young (eay (at) cryptsoft.com)"
     35  *    The word 'cryptographic' can be left out if the rouines from the library
     36  *    being used are not cryptographic related :-).
     37  * 4. If you include any Windows specific code (or a derivative thereof) from
     38  *    the apps directory (application code) you must include an acknowledgement:
     39  *    "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)"
     40  *
     41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
     42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     51  * SUCH DAMAGE.
     52  *
     53  * The licence and distribution terms for any publically available version or
     54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
     55  * copied and put under another distribution licence
     56  * [including the GNU Public Licence.]
     57  */
     58 
     59 #include "rpc_des.h"
     60 #include "des_locl.h"
     61 
     62 int _des_crypt(char *buf,int len,struct desparams *desp);
     63 int _des_crypt(char *buf, int len, struct desparams *desp)
     64 	{
     65 	des_key_schedule ks;
     66 	int enc;
     67 
     68 	des_set_key_unchecked(&desp->des_key,ks);
     69 	enc=(desp->des_dir == ENCRYPT)?DES_ENCRYPT:DES_DECRYPT;
     70 
     71 	if (desp->des_mode == CBC)
     72 		des_ecb_encrypt((const_des_cblock *)desp->UDES.UDES_buf,
     73 				(des_cblock *)desp->UDES.UDES_buf,ks,
     74 				enc);
     75 	else
     76 		{
     77 		des_ncbc_encrypt(desp->UDES.UDES_buf,desp->UDES.UDES_buf,
     78 				len,ks,&desp->des_ivec,enc);
     79 #ifdef undef
     80 		/* len will always be %8 if called from common_crypt
     81 		 * in secure_rpc.
     82 		 * Libdes's cbc encrypt does not copy back the iv,
     83 		 * so we have to do it here. */
     84 		/* It does now :-) eay 20/09/95 */
     85 
     86 		a=(char *)&(desp->UDES.UDES_buf[len-8]);
     87 		b=(char *)&(desp->des_ivec[0]);
     88 
     89 		*(a++)= *(b++); *(a++)= *(b++);
     90 		*(a++)= *(b++); *(a++)= *(b++);
     91 		*(a++)= *(b++); *(a++)= *(b++);
     92 		*(a++)= *(b++); *(a++)= *(b++);
     93 #endif
     94 		}
     95 	return(1);
     96 	}
     97 
     98