crypto/des/rpc_enc.c

   1 /* crypto/des/rpc_enc.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@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@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@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@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 #include "des_ver.h"
  62
  63 int _des_crypt(char *buf, int len, struct desparams *desp);
  64 int _des_crypt(char *buf, int len, struct desparams *desp)
  65 {
  66     DES_key_schedule ks;
  67     int enc;
  68
  69     DES_set_key_unchecked(&desp->des_key, &ks);
  70     enc = (desp->des_dir == ENCRYPT) ? DES_ENCRYPT : DES_DECRYPT;
  71
  72     if (desp->des_mode == CBC)
  73         DES_ecb_encrypt((const_DES_cblock *)desp->UDES.UDES_buf,
  74                         (DES_cblock *)desp->UDES.UDES_buf, &ks, enc);
  75     else {
  76         DES_ncbc_encrypt(desp->UDES.UDES_buf, desp->UDES.UDES_buf,
  77                          len, &ks, &desp->des_ivec, enc);
  78 #ifdef undef
  79         /*
  80          * len will always be %8 if called from common_crypt in secure_rpc.
  81          * Libdes's cbc encrypt does not copy back the iv, so we have to do
  82          * it here.
  83          */
  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++);
  90         *(a++) = *(b++);
  91         *(a++) = *(b++);
  92         *(a++) = *(b++);
  93         *(a++) = *(b++);
  94         *(a++) = *(b++);
  95         *(a++) = *(b++);
  96         *(a++) = *(b++);
  97 #endif
  98     }
  99     return (1);
 100 }