hime-crypt.cpp

/* Copyright (C) 2009 Edward Der-Hua Liu, Hsin-Chu, Taiwan
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "hime-protocol.h"

static int __hime_rand__(u_int *next)
{
  *next = *next * 1103515245 + 12345;
  return((unsigned)(*next/65536) % 32768);
}

void __hime_enc_mem(u_char *p, int n,
                    HIME_PASSWD *passwd, u_int *seed)
{
  int i;

  for(i=0; i < n; i++) {
    int v = __hime_rand__(seed) % __HIME_PASSWD_N_;
    p[i]^=passwd->passwd[v];
  }
}