reactos/dll/win32/libtirpc/src/des_crypt.c

   1 /*
   2  * Copyright (c) 2009, Sun Microsystems, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  * - Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  * - Redistributions in binary form must reproduce the above copyright notice,
  10  *   this list of conditions and the following disclaimer in the documentation
  11  *   and/or other materials provided with the distribution.
  12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  13  *   contributors may be used to endorse or promote products derived
  14  *   from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28 /*
  29  * des_crypt.c, DES encryption library routines
  30  * Copyright (C) 1986, Sun Microsystems, Inc.
  31  */
  32
  33 #include <wintirpc.h>
  34 #include <sys/types.h>
  35 #include <rpc/types.h>
  36 #include <rpc/des_crypt.h>
  37 #include <rpc/des.h>
  38 #if 0
  39 #ifndef lint
  40 static char sccsid[] = "@(#)des_crypt.c 2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI";
  41 #endif
  42 #endif
  43 //#include <sys/cdefs.h>
  44
  45 static int common_crypt( char *, char *, unsigned, unsigned, struct desparams * );
  46 int (*__des_crypt_LOCAL)() = 0;
  47 extern int _des_crypt_call(char *, int, struct desparams *);
  48 /*
  49  * Copy 8 bytes
  50  */
  51 #define COPY8(src, dst) { \
  52         char *a = (char *) dst; \
  53         char *b = (char *) src; \
  54         *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
  55         *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
  56 }
  57
  58 /*
  59  * Copy multiple of 8 bytes
  60  */
  61 #define DESCOPY(src, dst, len) { \
  62         char *a = (char *) dst; \
  63         char *b = (char *) src; \
  64         int i; \
  65         for (i = (int) len; i > 0; i -= 8) { \
  66                 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
  67                 *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \
  68         } \
  69 }
  70
  71 /*
  72  * CBC mode encryption
  73  */
  74 int
  75 cbc_crypt(key, buf, len, mode, ivec)
  76         char *key;
  77         char *buf;
  78         unsigned len;
  79         unsigned mode;
  80         char *ivec;
  81 {
  82         int err;
  83         struct desparams dp;
  84
  85 #ifdef BROKEN_DES
  86         dp.UDES.UDES_buf = buf;
  87         dp.des_mode = ECB;
  88 #else
  89         dp.des_mode = CBC;
  90 #endif
  91         COPY8(ivec, dp.des_ivec);
  92         err = common_crypt(key, buf, len, mode, &dp);
  93         COPY8(dp.des_ivec, ivec);
  94         return(err);
  95 }
  96
  97
  98 /*
  99  * ECB mode encryption
 100  */
 101 int
 102 ecb_crypt(key, buf, len, mode)
 103         char *key;
 104         char *buf;
 105         unsigned len;
 106         unsigned mode;
 107 {
 108         struct desparams dp;
 109
 110 #ifdef BROKEN_DES
 111         dp.UDES.UDES_buf = buf;
 112         dp.des_mode = CBC;
 113 #else
 114         dp.des_mode = ECB;
 115 #endif
 116         return(common_crypt(key, buf, len, mode, &dp));
 117 }
 118
 119
 120
 121 /*
 122  * Common code to cbc_crypt() & ecb_crypt()
 123  */
 124 static int
 125 common_crypt(key, buf, len, mode, desp)
 126         char *key;
 127         char *buf;
 128         unsigned len;
 129         unsigned mode;
 130         struct desparams *desp;
 131 {
 132         int desdev;
 133
 134         if ((len % 8) != 0 || len > DES_MAXDATA) {
 135                 return(DESERR_BADPARAM);
 136         }
 137         desp->des_dir =
 138                 ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT;
 139
 140         desdev = mode & DES_DEVMASK;
 141         COPY8(key, desp->des_key);
 142         /*
 143          * software
 144          */
 145         if (__des_crypt_LOCAL != NULL) {
 146                 if (!__des_crypt_LOCAL(buf, len, desp)) {
 147                         return (DESERR_HWERROR);
 148                 }
 149         } else {
 150                 if (!_des_crypt_call(buf, len, desp)) {
 151                         return (DESERR_HWERROR);
 152                 }
 153         }
 154         return(desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE);
 155 }