Check password salt based on MD5 : MD5 Message Digest algorithm  « Security « Java Tutorial

1. Java Tutorial
2. Security
3. MD5 Message Digest algorithm

import java.security.MessageDigest;


public class MainClass {
  public static void main(String args[]) throws Exception {
    String name = "name";
    String passwd = "password";
    String salts = "12,12,12";

    String salttmp[] = salts.split(",");
    byte salt[] = new byte[salttmp.length];

    for (int i = 0; i < salt.length; i++) {
      salt[i] = Byte.parseByte(salttmp[i]);
    }
    MessageDigest m = MessageDigest.getInstance("MD5");
    m.update(salt);
    m.update("name".getBytes("UTF8"));
    byte s[] = m.digest();
    String result = "";
    for (int i = 0; i < s.length; i++) {
      result += Integer.toHexString((0x000000ff & s[i]) | 0xffffff00).substring(6);
    }
    System.out.println(result.equals(passwd));
  }
}