glibc/sunrpc/des_soft.c

#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)des_soft.c	2.2 88/08/10 4.0 RPCSRC; from 1.13 88/02/08 SMI";
#endif
/*
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Sun Microsystems, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "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
 *   COPYRIGHT HOLDER 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.
 */

#include <rpc/des_crypt.h>
/*
 * Table giving odd parity in the low bit for ASCII characters
 */
static const char partab[128] =
{
  0x01, 0x01, 0x02, 0x02, 0x04, 0x04, 0x07, 0x07,
  0x08, 0x08, 0x0b, 0x0b, 0x0d, 0x0d, 0x0e, 0x0e,
  0x10, 0x10, 0x13, 0x13, 0x15, 0x15, 0x16, 0x16,
  0x19, 0x19, 0x1a, 0x1a, 0x1c, 0x1c, 0x1f, 0x1f,
  0x20, 0x20, 0x23, 0x23, 0x25, 0x25, 0x26, 0x26,
  0x29, 0x29, 0x2a, 0x2a, 0x2c, 0x2c, 0x2f, 0x2f,
  0x31, 0x31, 0x32, 0x32, 0x34, 0x34, 0x37, 0x37,
  0x38, 0x38, 0x3b, 0x3b, 0x3d, 0x3d, 0x3e, 0x3e,
  0x40, 0x40, 0x43, 0x43, 0x45, 0x45, 0x46, 0x46,
  0x49, 0x49, 0x4a, 0x4a, 0x4c, 0x4c, 0x4f, 0x4f,
  0x51, 0x51, 0x52, 0x52, 0x54, 0x54, 0x57, 0x57,
  0x58, 0x58, 0x5b, 0x5b, 0x5d, 0x5d, 0x5e, 0x5e,
  0x61, 0x61, 0x62, 0x62, 0x64, 0x64, 0x67, 0x67,
  0x68, 0x68, 0x6b, 0x6b, 0x6d, 0x6d, 0x6e, 0x6e,
  0x70, 0x70, 0x73, 0x73, 0x75, 0x75, 0x76, 0x76,
  0x79, 0x79, 0x7a, 0x7a, 0x7c, 0x7c, 0x7f, 0x7f,
};

/*
 * Add odd parity to low bit of 8 byte key
 */
void
des_setparity (char *p)
{
  int i;

  for (i = 0; i < 8; i++)
    {
      *p = partab[*p & 0x7f];
      p++;
    }
}
libc_hidden_def (des_setparity)