crypto/heimdal-0.6.3/lib/des/rpc_enc.c

   1 /* crypto/des/rpc_enc.c */
   2 /* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@mincom.oz.au).
   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@mincom.oz.au).
  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@mincom.oz.au)"
  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@mincom.oz.au)"
  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 #include "des_ver.h"
  62
  63 #ifndef NOPROTO
  64 int _des_crypt(char *buf,int len,struct desparams *desp);
  65 #else
  66 int _des_crypt();
  67 #endif
  68
  69 int _des_crypt(buf, len, desp)
  70 char *buf;
  71 int len;
  72 struct desparams *desp;
  73         {
  74         des_key_schedule ks;
  75         int enc;
  76
  77         des_set_key((des_cblock *)desp->des_key,ks);
  78         enc=(desp->des_dir == ENCRYPT)?DES_ENCRYPT:DES_DECRYPT;
  79
  80         if (desp->des_mode == CBC)
  81                 des_ecb_encrypt((des_cblock *)desp->UDES.UDES_buf,
  82                                 (des_cblock *)desp->UDES.UDES_buf,ks,enc);
  83         else
  84                 {
  85                 des_ncbc_encrypt((des_cblock *)desp->UDES.UDES_buf,
  86                                 (des_cblock *)desp->UDES.UDES_buf,
  87                                 (long)len,ks,
  88                                 (des_cblock *)desp->des_ivec,enc);
  89 #ifdef undef
  90                 /* len will always be %8 if called from common_crypt
  91                  * in secure_rpc.
  92                  * Libdes's cbc encrypt does not copy back the iv,
  93                  * so we have to do it here. */
  94                 /* It does now :-) eay 20/09/95 */
  95
  96                 a=(char *)&(desp->UDES.UDES_buf[len-8]);
  97                 b=(char *)&(desp->des_ivec[0]);
  98
  99                 *(a++)= *(b++); *(a++)= *(b++);
 100                 *(a++)= *(b++); *(a++)= *(b++);
 101                 *(a++)= *(b++); *(a++)= *(b++);
 102                 *(a++)= *(b++); *(a++)= *(b++);
 103 #endif
 104                 }
 105         return(1);
 106         }
 107