hasher.java

java kerberos implementation

/*
  Simple Implementation of Kerberos protocol v5
  Copyright (C) 2003 Thia Yeo Ching ([e-mail])

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License
  as published by the Free Software Foundation; either version 2
  of the License, or (at your option) any later version.

  This program 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 General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
package SimpleKerberos.tool;

import java.math.BigInteger;
import java.security.MessageDigest;


public class Hasher
{
  private static final String HASH_ALGO_NAME = "MD5";

  public static String hash(String s)
  {
    try
    {
      MessageDigest md = MessageDigest.getInstance(HASH_ALGO_NAME);

      // Encodes this String into a sequence of bytes
      // using the platform's default charset, storing
      // the result into a new byte array.
      byte[] sbytes = s.getBytes();
      md.update(sbytes);
      byte[] sbytesDigest = md.digest();  // get digested string
      return new BigInteger(1, sbytesDigest).toString(16);  // 16: hex
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }

    return null;
  }
}